unofficial mirror of bug-gnu-emacs@gnu.org 
 help / color / mirror / code / Atom feed
blob 81ff9df153d0e6e2d69486c2b3cc39f220e7db9a 395380 bytes (raw)
name: src/keyboard.c 	 # note: path name is non-authoritative(*)

    1
    2
    3
    4
    5
    6
    7
    8
    9
   10
   11
   12
   13
   14
   15
   16
   17
   18
   19
   20
   21
   22
   23
   24
   25
   26
   27
   28
   29
   30
   31
   32
   33
   34
   35
   36
   37
   38
   39
   40
   41
   42
   43
   44
   45
   46
   47
   48
   49
   50
   51
   52
   53
   54
   55
   56
   57
   58
   59
   60
   61
   62
   63
   64
   65
   66
   67
   68
   69
   70
   71
   72
   73
   74
   75
   76
   77
   78
   79
   80
   81
   82
   83
   84
   85
   86
   87
   88
   89
   90
   91
   92
   93
   94
   95
   96
   97
   98
   99
  100
  101
  102
  103
  104
  105
  106
  107
  108
  109
  110
  111
  112
  113
  114
  115
  116
  117
  118
  119
  120
  121
  122
  123
  124
  125
  126
  127
  128
  129
  130
  131
  132
  133
  134
  135
  136
  137
  138
  139
  140
  141
  142
  143
  144
  145
  146
  147
  148
  149
  150
  151
  152
  153
  154
  155
  156
  157
  158
  159
  160
  161
  162
  163
  164
  165
  166
  167
  168
  169
  170
  171
  172
  173
  174
  175
  176
  177
  178
  179
  180
  181
  182
  183
  184
  185
  186
  187
  188
  189
  190
  191
  192
  193
  194
  195
  196
  197
  198
  199
  200
  201
  202
  203
  204
  205
  206
  207
  208
  209
  210
  211
  212
  213
  214
  215
  216
  217
  218
  219
  220
  221
  222
  223
  224
  225
  226
  227
  228
  229
  230
  231
  232
  233
  234
  235
  236
  237
  238
  239
  240
  241
  242
  243
  244
  245
  246
  247
  248
  249
  250
  251
  252
  253
  254
  255
  256
  257
  258
  259
  260
  261
  262
  263
  264
  265
  266
  267
  268
  269
  270
  271
  272
  273
  274
  275
  276
  277
  278
  279
  280
  281
  282
  283
  284
  285
  286
  287
  288
  289
  290
  291
  292
  293
  294
  295
  296
  297
  298
  299
  300
  301
  302
  303
  304
  305
  306
  307
  308
  309
  310
  311
  312
  313
  314
  315
  316
  317
  318
  319
  320
  321
  322
  323
  324
  325
  326
  327
  328
  329
  330
  331
  332
  333
  334
  335
  336
  337
  338
  339
  340
  341
  342
  343
  344
  345
  346
  347
  348
  349
  350
  351
  352
  353
  354
  355
  356
  357
  358
  359
  360
  361
  362
  363
  364
  365
  366
  367
  368
  369
  370
  371
  372
  373
  374
  375
  376
  377
  378
  379
  380
  381
  382
  383
  384
  385
  386
  387
  388
  389
  390
  391
  392
  393
  394
  395
  396
  397
  398
  399
  400
  401
  402
  403
  404
  405
  406
  407
  408
  409
  410
  411
  412
  413
  414
  415
  416
  417
  418
  419
  420
  421
  422
  423
  424
  425
  426
  427
  428
  429
  430
  431
  432
  433
  434
  435
  436
  437
  438
  439
  440
  441
  442
  443
  444
  445
  446
  447
  448
  449
  450
  451
  452
  453
  454
  455
  456
  457
  458
  459
  460
  461
  462
  463
  464
  465
  466
  467
  468
  469
  470
  471
  472
  473
  474
  475
  476
  477
  478
  479
  480
  481
  482
  483
  484
  485
  486
  487
  488
  489
  490
  491
  492
  493
  494
  495
  496
  497
  498
  499
  500
  501
  502
  503
  504
  505
  506
  507
  508
  509
  510
  511
  512
  513
  514
  515
  516
  517
  518
  519
  520
  521
  522
  523
  524
  525
  526
  527
  528
  529
  530
  531
  532
  533
  534
  535
  536
  537
  538
  539
  540
  541
  542
  543
  544
  545
  546
  547
  548
  549
  550
  551
  552
  553
  554
  555
  556
  557
  558
  559
  560
  561
  562
  563
  564
  565
  566
  567
  568
  569
  570
  571
  572
  573
  574
  575
  576
  577
  578
  579
  580
  581
  582
  583
  584
  585
  586
  587
  588
  589
  590
  591
  592
  593
  594
  595
  596
  597
  598
  599
  600
  601
  602
  603
  604
  605
  606
  607
  608
  609
  610
  611
  612
  613
  614
  615
  616
  617
  618
  619
  620
  621
  622
  623
  624
  625
  626
  627
  628
  629
  630
  631
  632
  633
  634
  635
  636
  637
  638
  639
  640
  641
  642
  643
  644
  645
  646
  647
  648
  649
  650
  651
  652
  653
  654
  655
  656
  657
  658
  659
  660
  661
  662
  663
  664
  665
  666
  667
  668
  669
  670
  671
  672
  673
  674
  675
  676
  677
  678
  679
  680
  681
  682
  683
  684
  685
  686
  687
  688
  689
  690
  691
  692
  693
  694
  695
  696
  697
  698
  699
  700
  701
  702
  703
  704
  705
  706
  707
  708
  709
  710
  711
  712
  713
  714
  715
  716
  717
  718
  719
  720
  721
  722
  723
  724
  725
  726
  727
  728
  729
  730
  731
  732
  733
  734
  735
  736
  737
  738
  739
  740
  741
  742
  743
  744
  745
  746
  747
  748
  749
  750
  751
  752
  753
  754
  755
  756
  757
  758
  759
  760
  761
  762
  763
  764
  765
  766
  767
  768
  769
  770
  771
  772
  773
  774
  775
  776
  777
  778
  779
  780
  781
  782
  783
  784
  785
  786
  787
  788
  789
  790
  791
  792
  793
  794
  795
  796
  797
  798
  799
  800
  801
  802
  803
  804
  805
  806
  807
  808
  809
  810
  811
  812
  813
  814
  815
  816
  817
  818
  819
  820
  821
  822
  823
  824
  825
  826
  827
  828
  829
  830
  831
  832
  833
  834
  835
  836
  837
  838
  839
  840
  841
  842
  843
  844
  845
  846
  847
  848
  849
  850
  851
  852
  853
  854
  855
  856
  857
  858
  859
  860
  861
  862
  863
  864
  865
  866
  867
  868
  869
  870
  871
  872
  873
  874
  875
  876
  877
  878
  879
  880
  881
  882
  883
  884
  885
  886
  887
  888
  889
  890
  891
  892
  893
  894
  895
  896
  897
  898
  899
  900
  901
  902
  903
  904
  905
  906
  907
  908
  909
  910
  911
  912
  913
  914
  915
  916
  917
  918
  919
  920
  921
  922
  923
  924
  925
  926
  927
  928
  929
  930
  931
  932
  933
  934
  935
  936
  937
  938
  939
  940
  941
  942
  943
  944
  945
  946
  947
  948
  949
  950
  951
  952
  953
  954
  955
  956
  957
  958
  959
  960
  961
  962
  963
  964
  965
  966
  967
  968
  969
  970
  971
  972
  973
  974
  975
  976
  977
  978
  979
  980
  981
  982
  983
  984
  985
  986
  987
  988
  989
  990
  991
  992
  993
  994
  995
  996
  997
  998
  999
 1000
 1001
 1002
 1003
 1004
 1005
 1006
 1007
 1008
 1009
 1010
 1011
 1012
 1013
 1014
 1015
 1016
 1017
 1018
 1019
 1020
 1021
 1022
 1023
 1024
 1025
 1026
 1027
 1028
 1029
 1030
 1031
 1032
 1033
 1034
 1035
 1036
 1037
 1038
 1039
 1040
 1041
 1042
 1043
 1044
 1045
 1046
 1047
 1048
 1049
 1050
 1051
 1052
 1053
 1054
 1055
 1056
 1057
 1058
 1059
 1060
 1061
 1062
 1063
 1064
 1065
 1066
 1067
 1068
 1069
 1070
 1071
 1072
 1073
 1074
 1075
 1076
 1077
 1078
 1079
 1080
 1081
 1082
 1083
 1084
 1085
 1086
 1087
 1088
 1089
 1090
 1091
 1092
 1093
 1094
 1095
 1096
 1097
 1098
 1099
 1100
 1101
 1102
 1103
 1104
 1105
 1106
 1107
 1108
 1109
 1110
 1111
 1112
 1113
 1114
 1115
 1116
 1117
 1118
 1119
 1120
 1121
 1122
 1123
 1124
 1125
 1126
 1127
 1128
 1129
 1130
 1131
 1132
 1133
 1134
 1135
 1136
 1137
 1138
 1139
 1140
 1141
 1142
 1143
 1144
 1145
 1146
 1147
 1148
 1149
 1150
 1151
 1152
 1153
 1154
 1155
 1156
 1157
 1158
 1159
 1160
 1161
 1162
 1163
 1164
 1165
 1166
 1167
 1168
 1169
 1170
 1171
 1172
 1173
 1174
 1175
 1176
 1177
 1178
 1179
 1180
 1181
 1182
 1183
 1184
 1185
 1186
 1187
 1188
 1189
 1190
 1191
 1192
 1193
 1194
 1195
 1196
 1197
 1198
 1199
 1200
 1201
 1202
 1203
 1204
 1205
 1206
 1207
 1208
 1209
 1210
 1211
 1212
 1213
 1214
 1215
 1216
 1217
 1218
 1219
 1220
 1221
 1222
 1223
 1224
 1225
 1226
 1227
 1228
 1229
 1230
 1231
 1232
 1233
 1234
 1235
 1236
 1237
 1238
 1239
 1240
 1241
 1242
 1243
 1244
 1245
 1246
 1247
 1248
 1249
 1250
 1251
 1252
 1253
 1254
 1255
 1256
 1257
 1258
 1259
 1260
 1261
 1262
 1263
 1264
 1265
 1266
 1267
 1268
 1269
 1270
 1271
 1272
 1273
 1274
 1275
 1276
 1277
 1278
 1279
 1280
 1281
 1282
 1283
 1284
 1285
 1286
 1287
 1288
 1289
 1290
 1291
 1292
 1293
 1294
 1295
 1296
 1297
 1298
 1299
 1300
 1301
 1302
 1303
 1304
 1305
 1306
 1307
 1308
 1309
 1310
 1311
 1312
 1313
 1314
 1315
 1316
 1317
 1318
 1319
 1320
 1321
 1322
 1323
 1324
 1325
 1326
 1327
 1328
 1329
 1330
 1331
 1332
 1333
 1334
 1335
 1336
 1337
 1338
 1339
 1340
 1341
 1342
 1343
 1344
 1345
 1346
 1347
 1348
 1349
 1350
 1351
 1352
 1353
 1354
 1355
 1356
 1357
 1358
 1359
 1360
 1361
 1362
 1363
 1364
 1365
 1366
 1367
 1368
 1369
 1370
 1371
 1372
 1373
 1374
 1375
 1376
 1377
 1378
 1379
 1380
 1381
 1382
 1383
 1384
 1385
 1386
 1387
 1388
 1389
 1390
 1391
 1392
 1393
 1394
 1395
 1396
 1397
 1398
 1399
 1400
 1401
 1402
 1403
 1404
 1405
 1406
 1407
 1408
 1409
 1410
 1411
 1412
 1413
 1414
 1415
 1416
 1417
 1418
 1419
 1420
 1421
 1422
 1423
 1424
 1425
 1426
 1427
 1428
 1429
 1430
 1431
 1432
 1433
 1434
 1435
 1436
 1437
 1438
 1439
 1440
 1441
 1442
 1443
 1444
 1445
 1446
 1447
 1448
 1449
 1450
 1451
 1452
 1453
 1454
 1455
 1456
 1457
 1458
 1459
 1460
 1461
 1462
 1463
 1464
 1465
 1466
 1467
 1468
 1469
 1470
 1471
 1472
 1473
 1474
 1475
 1476
 1477
 1478
 1479
 1480
 1481
 1482
 1483
 1484
 1485
 1486
 1487
 1488
 1489
 1490
 1491
 1492
 1493
 1494
 1495
 1496
 1497
 1498
 1499
 1500
 1501
 1502
 1503
 1504
 1505
 1506
 1507
 1508
 1509
 1510
 1511
 1512
 1513
 1514
 1515
 1516
 1517
 1518
 1519
 1520
 1521
 1522
 1523
 1524
 1525
 1526
 1527
 1528
 1529
 1530
 1531
 1532
 1533
 1534
 1535
 1536
 1537
 1538
 1539
 1540
 1541
 1542
 1543
 1544
 1545
 1546
 1547
 1548
 1549
 1550
 1551
 1552
 1553
 1554
 1555
 1556
 1557
 1558
 1559
 1560
 1561
 1562
 1563
 1564
 1565
 1566
 1567
 1568
 1569
 1570
 1571
 1572
 1573
 1574
 1575
 1576
 1577
 1578
 1579
 1580
 1581
 1582
 1583
 1584
 1585
 1586
 1587
 1588
 1589
 1590
 1591
 1592
 1593
 1594
 1595
 1596
 1597
 1598
 1599
 1600
 1601
 1602
 1603
 1604
 1605
 1606
 1607
 1608
 1609
 1610
 1611
 1612
 1613
 1614
 1615
 1616
 1617
 1618
 1619
 1620
 1621
 1622
 1623
 1624
 1625
 1626
 1627
 1628
 1629
 1630
 1631
 1632
 1633
 1634
 1635
 1636
 1637
 1638
 1639
 1640
 1641
 1642
 1643
 1644
 1645
 1646
 1647
 1648
 1649
 1650
 1651
 1652
 1653
 1654
 1655
 1656
 1657
 1658
 1659
 1660
 1661
 1662
 1663
 1664
 1665
 1666
 1667
 1668
 1669
 1670
 1671
 1672
 1673
 1674
 1675
 1676
 1677
 1678
 1679
 1680
 1681
 1682
 1683
 1684
 1685
 1686
 1687
 1688
 1689
 1690
 1691
 1692
 1693
 1694
 1695
 1696
 1697
 1698
 1699
 1700
 1701
 1702
 1703
 1704
 1705
 1706
 1707
 1708
 1709
 1710
 1711
 1712
 1713
 1714
 1715
 1716
 1717
 1718
 1719
 1720
 1721
 1722
 1723
 1724
 1725
 1726
 1727
 1728
 1729
 1730
 1731
 1732
 1733
 1734
 1735
 1736
 1737
 1738
 1739
 1740
 1741
 1742
 1743
 1744
 1745
 1746
 1747
 1748
 1749
 1750
 1751
 1752
 1753
 1754
 1755
 1756
 1757
 1758
 1759
 1760
 1761
 1762
 1763
 1764
 1765
 1766
 1767
 1768
 1769
 1770
 1771
 1772
 1773
 1774
 1775
 1776
 1777
 1778
 1779
 1780
 1781
 1782
 1783
 1784
 1785
 1786
 1787
 1788
 1789
 1790
 1791
 1792
 1793
 1794
 1795
 1796
 1797
 1798
 1799
 1800
 1801
 1802
 1803
 1804
 1805
 1806
 1807
 1808
 1809
 1810
 1811
 1812
 1813
 1814
 1815
 1816
 1817
 1818
 1819
 1820
 1821
 1822
 1823
 1824
 1825
 1826
 1827
 1828
 1829
 1830
 1831
 1832
 1833
 1834
 1835
 1836
 1837
 1838
 1839
 1840
 1841
 1842
 1843
 1844
 1845
 1846
 1847
 1848
 1849
 1850
 1851
 1852
 1853
 1854
 1855
 1856
 1857
 1858
 1859
 1860
 1861
 1862
 1863
 1864
 1865
 1866
 1867
 1868
 1869
 1870
 1871
 1872
 1873
 1874
 1875
 1876
 1877
 1878
 1879
 1880
 1881
 1882
 1883
 1884
 1885
 1886
 1887
 1888
 1889
 1890
 1891
 1892
 1893
 1894
 1895
 1896
 1897
 1898
 1899
 1900
 1901
 1902
 1903
 1904
 1905
 1906
 1907
 1908
 1909
 1910
 1911
 1912
 1913
 1914
 1915
 1916
 1917
 1918
 1919
 1920
 1921
 1922
 1923
 1924
 1925
 1926
 1927
 1928
 1929
 1930
 1931
 1932
 1933
 1934
 1935
 1936
 1937
 1938
 1939
 1940
 1941
 1942
 1943
 1944
 1945
 1946
 1947
 1948
 1949
 1950
 1951
 1952
 1953
 1954
 1955
 1956
 1957
 1958
 1959
 1960
 1961
 1962
 1963
 1964
 1965
 1966
 1967
 1968
 1969
 1970
 1971
 1972
 1973
 1974
 1975
 1976
 1977
 1978
 1979
 1980
 1981
 1982
 1983
 1984
 1985
 1986
 1987
 1988
 1989
 1990
 1991
 1992
 1993
 1994
 1995
 1996
 1997
 1998
 1999
 2000
 2001
 2002
 2003
 2004
 2005
 2006
 2007
 2008
 2009
 2010
 2011
 2012
 2013
 2014
 2015
 2016
 2017
 2018
 2019
 2020
 2021
 2022
 2023
 2024
 2025
 2026
 2027
 2028
 2029
 2030
 2031
 2032
 2033
 2034
 2035
 2036
 2037
 2038
 2039
 2040
 2041
 2042
 2043
 2044
 2045
 2046
 2047
 2048
 2049
 2050
 2051
 2052
 2053
 2054
 2055
 2056
 2057
 2058
 2059
 2060
 2061
 2062
 2063
 2064
 2065
 2066
 2067
 2068
 2069
 2070
 2071
 2072
 2073
 2074
 2075
 2076
 2077
 2078
 2079
 2080
 2081
 2082
 2083
 2084
 2085
 2086
 2087
 2088
 2089
 2090
 2091
 2092
 2093
 2094
 2095
 2096
 2097
 2098
 2099
 2100
 2101
 2102
 2103
 2104
 2105
 2106
 2107
 2108
 2109
 2110
 2111
 2112
 2113
 2114
 2115
 2116
 2117
 2118
 2119
 2120
 2121
 2122
 2123
 2124
 2125
 2126
 2127
 2128
 2129
 2130
 2131
 2132
 2133
 2134
 2135
 2136
 2137
 2138
 2139
 2140
 2141
 2142
 2143
 2144
 2145
 2146
 2147
 2148
 2149
 2150
 2151
 2152
 2153
 2154
 2155
 2156
 2157
 2158
 2159
 2160
 2161
 2162
 2163
 2164
 2165
 2166
 2167
 2168
 2169
 2170
 2171
 2172
 2173
 2174
 2175
 2176
 2177
 2178
 2179
 2180
 2181
 2182
 2183
 2184
 2185
 2186
 2187
 2188
 2189
 2190
 2191
 2192
 2193
 2194
 2195
 2196
 2197
 2198
 2199
 2200
 2201
 2202
 2203
 2204
 2205
 2206
 2207
 2208
 2209
 2210
 2211
 2212
 2213
 2214
 2215
 2216
 2217
 2218
 2219
 2220
 2221
 2222
 2223
 2224
 2225
 2226
 2227
 2228
 2229
 2230
 2231
 2232
 2233
 2234
 2235
 2236
 2237
 2238
 2239
 2240
 2241
 2242
 2243
 2244
 2245
 2246
 2247
 2248
 2249
 2250
 2251
 2252
 2253
 2254
 2255
 2256
 2257
 2258
 2259
 2260
 2261
 2262
 2263
 2264
 2265
 2266
 2267
 2268
 2269
 2270
 2271
 2272
 2273
 2274
 2275
 2276
 2277
 2278
 2279
 2280
 2281
 2282
 2283
 2284
 2285
 2286
 2287
 2288
 2289
 2290
 2291
 2292
 2293
 2294
 2295
 2296
 2297
 2298
 2299
 2300
 2301
 2302
 2303
 2304
 2305
 2306
 2307
 2308
 2309
 2310
 2311
 2312
 2313
 2314
 2315
 2316
 2317
 2318
 2319
 2320
 2321
 2322
 2323
 2324
 2325
 2326
 2327
 2328
 2329
 2330
 2331
 2332
 2333
 2334
 2335
 2336
 2337
 2338
 2339
 2340
 2341
 2342
 2343
 2344
 2345
 2346
 2347
 2348
 2349
 2350
 2351
 2352
 2353
 2354
 2355
 2356
 2357
 2358
 2359
 2360
 2361
 2362
 2363
 2364
 2365
 2366
 2367
 2368
 2369
 2370
 2371
 2372
 2373
 2374
 2375
 2376
 2377
 2378
 2379
 2380
 2381
 2382
 2383
 2384
 2385
 2386
 2387
 2388
 2389
 2390
 2391
 2392
 2393
 2394
 2395
 2396
 2397
 2398
 2399
 2400
 2401
 2402
 2403
 2404
 2405
 2406
 2407
 2408
 2409
 2410
 2411
 2412
 2413
 2414
 2415
 2416
 2417
 2418
 2419
 2420
 2421
 2422
 2423
 2424
 2425
 2426
 2427
 2428
 2429
 2430
 2431
 2432
 2433
 2434
 2435
 2436
 2437
 2438
 2439
 2440
 2441
 2442
 2443
 2444
 2445
 2446
 2447
 2448
 2449
 2450
 2451
 2452
 2453
 2454
 2455
 2456
 2457
 2458
 2459
 2460
 2461
 2462
 2463
 2464
 2465
 2466
 2467
 2468
 2469
 2470
 2471
 2472
 2473
 2474
 2475
 2476
 2477
 2478
 2479
 2480
 2481
 2482
 2483
 2484
 2485
 2486
 2487
 2488
 2489
 2490
 2491
 2492
 2493
 2494
 2495
 2496
 2497
 2498
 2499
 2500
 2501
 2502
 2503
 2504
 2505
 2506
 2507
 2508
 2509
 2510
 2511
 2512
 2513
 2514
 2515
 2516
 2517
 2518
 2519
 2520
 2521
 2522
 2523
 2524
 2525
 2526
 2527
 2528
 2529
 2530
 2531
 2532
 2533
 2534
 2535
 2536
 2537
 2538
 2539
 2540
 2541
 2542
 2543
 2544
 2545
 2546
 2547
 2548
 2549
 2550
 2551
 2552
 2553
 2554
 2555
 2556
 2557
 2558
 2559
 2560
 2561
 2562
 2563
 2564
 2565
 2566
 2567
 2568
 2569
 2570
 2571
 2572
 2573
 2574
 2575
 2576
 2577
 2578
 2579
 2580
 2581
 2582
 2583
 2584
 2585
 2586
 2587
 2588
 2589
 2590
 2591
 2592
 2593
 2594
 2595
 2596
 2597
 2598
 2599
 2600
 2601
 2602
 2603
 2604
 2605
 2606
 2607
 2608
 2609
 2610
 2611
 2612
 2613
 2614
 2615
 2616
 2617
 2618
 2619
 2620
 2621
 2622
 2623
 2624
 2625
 2626
 2627
 2628
 2629
 2630
 2631
 2632
 2633
 2634
 2635
 2636
 2637
 2638
 2639
 2640
 2641
 2642
 2643
 2644
 2645
 2646
 2647
 2648
 2649
 2650
 2651
 2652
 2653
 2654
 2655
 2656
 2657
 2658
 2659
 2660
 2661
 2662
 2663
 2664
 2665
 2666
 2667
 2668
 2669
 2670
 2671
 2672
 2673
 2674
 2675
 2676
 2677
 2678
 2679
 2680
 2681
 2682
 2683
 2684
 2685
 2686
 2687
 2688
 2689
 2690
 2691
 2692
 2693
 2694
 2695
 2696
 2697
 2698
 2699
 2700
 2701
 2702
 2703
 2704
 2705
 2706
 2707
 2708
 2709
 2710
 2711
 2712
 2713
 2714
 2715
 2716
 2717
 2718
 2719
 2720
 2721
 2722
 2723
 2724
 2725
 2726
 2727
 2728
 2729
 2730
 2731
 2732
 2733
 2734
 2735
 2736
 2737
 2738
 2739
 2740
 2741
 2742
 2743
 2744
 2745
 2746
 2747
 2748
 2749
 2750
 2751
 2752
 2753
 2754
 2755
 2756
 2757
 2758
 2759
 2760
 2761
 2762
 2763
 2764
 2765
 2766
 2767
 2768
 2769
 2770
 2771
 2772
 2773
 2774
 2775
 2776
 2777
 2778
 2779
 2780
 2781
 2782
 2783
 2784
 2785
 2786
 2787
 2788
 2789
 2790
 2791
 2792
 2793
 2794
 2795
 2796
 2797
 2798
 2799
 2800
 2801
 2802
 2803
 2804
 2805
 2806
 2807
 2808
 2809
 2810
 2811
 2812
 2813
 2814
 2815
 2816
 2817
 2818
 2819
 2820
 2821
 2822
 2823
 2824
 2825
 2826
 2827
 2828
 2829
 2830
 2831
 2832
 2833
 2834
 2835
 2836
 2837
 2838
 2839
 2840
 2841
 2842
 2843
 2844
 2845
 2846
 2847
 2848
 2849
 2850
 2851
 2852
 2853
 2854
 2855
 2856
 2857
 2858
 2859
 2860
 2861
 2862
 2863
 2864
 2865
 2866
 2867
 2868
 2869
 2870
 2871
 2872
 2873
 2874
 2875
 2876
 2877
 2878
 2879
 2880
 2881
 2882
 2883
 2884
 2885
 2886
 2887
 2888
 2889
 2890
 2891
 2892
 2893
 2894
 2895
 2896
 2897
 2898
 2899
 2900
 2901
 2902
 2903
 2904
 2905
 2906
 2907
 2908
 2909
 2910
 2911
 2912
 2913
 2914
 2915
 2916
 2917
 2918
 2919
 2920
 2921
 2922
 2923
 2924
 2925
 2926
 2927
 2928
 2929
 2930
 2931
 2932
 2933
 2934
 2935
 2936
 2937
 2938
 2939
 2940
 2941
 2942
 2943
 2944
 2945
 2946
 2947
 2948
 2949
 2950
 2951
 2952
 2953
 2954
 2955
 2956
 2957
 2958
 2959
 2960
 2961
 2962
 2963
 2964
 2965
 2966
 2967
 2968
 2969
 2970
 2971
 2972
 2973
 2974
 2975
 2976
 2977
 2978
 2979
 2980
 2981
 2982
 2983
 2984
 2985
 2986
 2987
 2988
 2989
 2990
 2991
 2992
 2993
 2994
 2995
 2996
 2997
 2998
 2999
 3000
 3001
 3002
 3003
 3004
 3005
 3006
 3007
 3008
 3009
 3010
 3011
 3012
 3013
 3014
 3015
 3016
 3017
 3018
 3019
 3020
 3021
 3022
 3023
 3024
 3025
 3026
 3027
 3028
 3029
 3030
 3031
 3032
 3033
 3034
 3035
 3036
 3037
 3038
 3039
 3040
 3041
 3042
 3043
 3044
 3045
 3046
 3047
 3048
 3049
 3050
 3051
 3052
 3053
 3054
 3055
 3056
 3057
 3058
 3059
 3060
 3061
 3062
 3063
 3064
 3065
 3066
 3067
 3068
 3069
 3070
 3071
 3072
 3073
 3074
 3075
 3076
 3077
 3078
 3079
 3080
 3081
 3082
 3083
 3084
 3085
 3086
 3087
 3088
 3089
 3090
 3091
 3092
 3093
 3094
 3095
 3096
 3097
 3098
 3099
 3100
 3101
 3102
 3103
 3104
 3105
 3106
 3107
 3108
 3109
 3110
 3111
 3112
 3113
 3114
 3115
 3116
 3117
 3118
 3119
 3120
 3121
 3122
 3123
 3124
 3125
 3126
 3127
 3128
 3129
 3130
 3131
 3132
 3133
 3134
 3135
 3136
 3137
 3138
 3139
 3140
 3141
 3142
 3143
 3144
 3145
 3146
 3147
 3148
 3149
 3150
 3151
 3152
 3153
 3154
 3155
 3156
 3157
 3158
 3159
 3160
 3161
 3162
 3163
 3164
 3165
 3166
 3167
 3168
 3169
 3170
 3171
 3172
 3173
 3174
 3175
 3176
 3177
 3178
 3179
 3180
 3181
 3182
 3183
 3184
 3185
 3186
 3187
 3188
 3189
 3190
 3191
 3192
 3193
 3194
 3195
 3196
 3197
 3198
 3199
 3200
 3201
 3202
 3203
 3204
 3205
 3206
 3207
 3208
 3209
 3210
 3211
 3212
 3213
 3214
 3215
 3216
 3217
 3218
 3219
 3220
 3221
 3222
 3223
 3224
 3225
 3226
 3227
 3228
 3229
 3230
 3231
 3232
 3233
 3234
 3235
 3236
 3237
 3238
 3239
 3240
 3241
 3242
 3243
 3244
 3245
 3246
 3247
 3248
 3249
 3250
 3251
 3252
 3253
 3254
 3255
 3256
 3257
 3258
 3259
 3260
 3261
 3262
 3263
 3264
 3265
 3266
 3267
 3268
 3269
 3270
 3271
 3272
 3273
 3274
 3275
 3276
 3277
 3278
 3279
 3280
 3281
 3282
 3283
 3284
 3285
 3286
 3287
 3288
 3289
 3290
 3291
 3292
 3293
 3294
 3295
 3296
 3297
 3298
 3299
 3300
 3301
 3302
 3303
 3304
 3305
 3306
 3307
 3308
 3309
 3310
 3311
 3312
 3313
 3314
 3315
 3316
 3317
 3318
 3319
 3320
 3321
 3322
 3323
 3324
 3325
 3326
 3327
 3328
 3329
 3330
 3331
 3332
 3333
 3334
 3335
 3336
 3337
 3338
 3339
 3340
 3341
 3342
 3343
 3344
 3345
 3346
 3347
 3348
 3349
 3350
 3351
 3352
 3353
 3354
 3355
 3356
 3357
 3358
 3359
 3360
 3361
 3362
 3363
 3364
 3365
 3366
 3367
 3368
 3369
 3370
 3371
 3372
 3373
 3374
 3375
 3376
 3377
 3378
 3379
 3380
 3381
 3382
 3383
 3384
 3385
 3386
 3387
 3388
 3389
 3390
 3391
 3392
 3393
 3394
 3395
 3396
 3397
 3398
 3399
 3400
 3401
 3402
 3403
 3404
 3405
 3406
 3407
 3408
 3409
 3410
 3411
 3412
 3413
 3414
 3415
 3416
 3417
 3418
 3419
 3420
 3421
 3422
 3423
 3424
 3425
 3426
 3427
 3428
 3429
 3430
 3431
 3432
 3433
 3434
 3435
 3436
 3437
 3438
 3439
 3440
 3441
 3442
 3443
 3444
 3445
 3446
 3447
 3448
 3449
 3450
 3451
 3452
 3453
 3454
 3455
 3456
 3457
 3458
 3459
 3460
 3461
 3462
 3463
 3464
 3465
 3466
 3467
 3468
 3469
 3470
 3471
 3472
 3473
 3474
 3475
 3476
 3477
 3478
 3479
 3480
 3481
 3482
 3483
 3484
 3485
 3486
 3487
 3488
 3489
 3490
 3491
 3492
 3493
 3494
 3495
 3496
 3497
 3498
 3499
 3500
 3501
 3502
 3503
 3504
 3505
 3506
 3507
 3508
 3509
 3510
 3511
 3512
 3513
 3514
 3515
 3516
 3517
 3518
 3519
 3520
 3521
 3522
 3523
 3524
 3525
 3526
 3527
 3528
 3529
 3530
 3531
 3532
 3533
 3534
 3535
 3536
 3537
 3538
 3539
 3540
 3541
 3542
 3543
 3544
 3545
 3546
 3547
 3548
 3549
 3550
 3551
 3552
 3553
 3554
 3555
 3556
 3557
 3558
 3559
 3560
 3561
 3562
 3563
 3564
 3565
 3566
 3567
 3568
 3569
 3570
 3571
 3572
 3573
 3574
 3575
 3576
 3577
 3578
 3579
 3580
 3581
 3582
 3583
 3584
 3585
 3586
 3587
 3588
 3589
 3590
 3591
 3592
 3593
 3594
 3595
 3596
 3597
 3598
 3599
 3600
 3601
 3602
 3603
 3604
 3605
 3606
 3607
 3608
 3609
 3610
 3611
 3612
 3613
 3614
 3615
 3616
 3617
 3618
 3619
 3620
 3621
 3622
 3623
 3624
 3625
 3626
 3627
 3628
 3629
 3630
 3631
 3632
 3633
 3634
 3635
 3636
 3637
 3638
 3639
 3640
 3641
 3642
 3643
 3644
 3645
 3646
 3647
 3648
 3649
 3650
 3651
 3652
 3653
 3654
 3655
 3656
 3657
 3658
 3659
 3660
 3661
 3662
 3663
 3664
 3665
 3666
 3667
 3668
 3669
 3670
 3671
 3672
 3673
 3674
 3675
 3676
 3677
 3678
 3679
 3680
 3681
 3682
 3683
 3684
 3685
 3686
 3687
 3688
 3689
 3690
 3691
 3692
 3693
 3694
 3695
 3696
 3697
 3698
 3699
 3700
 3701
 3702
 3703
 3704
 3705
 3706
 3707
 3708
 3709
 3710
 3711
 3712
 3713
 3714
 3715
 3716
 3717
 3718
 3719
 3720
 3721
 3722
 3723
 3724
 3725
 3726
 3727
 3728
 3729
 3730
 3731
 3732
 3733
 3734
 3735
 3736
 3737
 3738
 3739
 3740
 3741
 3742
 3743
 3744
 3745
 3746
 3747
 3748
 3749
 3750
 3751
 3752
 3753
 3754
 3755
 3756
 3757
 3758
 3759
 3760
 3761
 3762
 3763
 3764
 3765
 3766
 3767
 3768
 3769
 3770
 3771
 3772
 3773
 3774
 3775
 3776
 3777
 3778
 3779
 3780
 3781
 3782
 3783
 3784
 3785
 3786
 3787
 3788
 3789
 3790
 3791
 3792
 3793
 3794
 3795
 3796
 3797
 3798
 3799
 3800
 3801
 3802
 3803
 3804
 3805
 3806
 3807
 3808
 3809
 3810
 3811
 3812
 3813
 3814
 3815
 3816
 3817
 3818
 3819
 3820
 3821
 3822
 3823
 3824
 3825
 3826
 3827
 3828
 3829
 3830
 3831
 3832
 3833
 3834
 3835
 3836
 3837
 3838
 3839
 3840
 3841
 3842
 3843
 3844
 3845
 3846
 3847
 3848
 3849
 3850
 3851
 3852
 3853
 3854
 3855
 3856
 3857
 3858
 3859
 3860
 3861
 3862
 3863
 3864
 3865
 3866
 3867
 3868
 3869
 3870
 3871
 3872
 3873
 3874
 3875
 3876
 3877
 3878
 3879
 3880
 3881
 3882
 3883
 3884
 3885
 3886
 3887
 3888
 3889
 3890
 3891
 3892
 3893
 3894
 3895
 3896
 3897
 3898
 3899
 3900
 3901
 3902
 3903
 3904
 3905
 3906
 3907
 3908
 3909
 3910
 3911
 3912
 3913
 3914
 3915
 3916
 3917
 3918
 3919
 3920
 3921
 3922
 3923
 3924
 3925
 3926
 3927
 3928
 3929
 3930
 3931
 3932
 3933
 3934
 3935
 3936
 3937
 3938
 3939
 3940
 3941
 3942
 3943
 3944
 3945
 3946
 3947
 3948
 3949
 3950
 3951
 3952
 3953
 3954
 3955
 3956
 3957
 3958
 3959
 3960
 3961
 3962
 3963
 3964
 3965
 3966
 3967
 3968
 3969
 3970
 3971
 3972
 3973
 3974
 3975
 3976
 3977
 3978
 3979
 3980
 3981
 3982
 3983
 3984
 3985
 3986
 3987
 3988
 3989
 3990
 3991
 3992
 3993
 3994
 3995
 3996
 3997
 3998
 3999
 4000
 4001
 4002
 4003
 4004
 4005
 4006
 4007
 4008
 4009
 4010
 4011
 4012
 4013
 4014
 4015
 4016
 4017
 4018
 4019
 4020
 4021
 4022
 4023
 4024
 4025
 4026
 4027
 4028
 4029
 4030
 4031
 4032
 4033
 4034
 4035
 4036
 4037
 4038
 4039
 4040
 4041
 4042
 4043
 4044
 4045
 4046
 4047
 4048
 4049
 4050
 4051
 4052
 4053
 4054
 4055
 4056
 4057
 4058
 4059
 4060
 4061
 4062
 4063
 4064
 4065
 4066
 4067
 4068
 4069
 4070
 4071
 4072
 4073
 4074
 4075
 4076
 4077
 4078
 4079
 4080
 4081
 4082
 4083
 4084
 4085
 4086
 4087
 4088
 4089
 4090
 4091
 4092
 4093
 4094
 4095
 4096
 4097
 4098
 4099
 4100
 4101
 4102
 4103
 4104
 4105
 4106
 4107
 4108
 4109
 4110
 4111
 4112
 4113
 4114
 4115
 4116
 4117
 4118
 4119
 4120
 4121
 4122
 4123
 4124
 4125
 4126
 4127
 4128
 4129
 4130
 4131
 4132
 4133
 4134
 4135
 4136
 4137
 4138
 4139
 4140
 4141
 4142
 4143
 4144
 4145
 4146
 4147
 4148
 4149
 4150
 4151
 4152
 4153
 4154
 4155
 4156
 4157
 4158
 4159
 4160
 4161
 4162
 4163
 4164
 4165
 4166
 4167
 4168
 4169
 4170
 4171
 4172
 4173
 4174
 4175
 4176
 4177
 4178
 4179
 4180
 4181
 4182
 4183
 4184
 4185
 4186
 4187
 4188
 4189
 4190
 4191
 4192
 4193
 4194
 4195
 4196
 4197
 4198
 4199
 4200
 4201
 4202
 4203
 4204
 4205
 4206
 4207
 4208
 4209
 4210
 4211
 4212
 4213
 4214
 4215
 4216
 4217
 4218
 4219
 4220
 4221
 4222
 4223
 4224
 4225
 4226
 4227
 4228
 4229
 4230
 4231
 4232
 4233
 4234
 4235
 4236
 4237
 4238
 4239
 4240
 4241
 4242
 4243
 4244
 4245
 4246
 4247
 4248
 4249
 4250
 4251
 4252
 4253
 4254
 4255
 4256
 4257
 4258
 4259
 4260
 4261
 4262
 4263
 4264
 4265
 4266
 4267
 4268
 4269
 4270
 4271
 4272
 4273
 4274
 4275
 4276
 4277
 4278
 4279
 4280
 4281
 4282
 4283
 4284
 4285
 4286
 4287
 4288
 4289
 4290
 4291
 4292
 4293
 4294
 4295
 4296
 4297
 4298
 4299
 4300
 4301
 4302
 4303
 4304
 4305
 4306
 4307
 4308
 4309
 4310
 4311
 4312
 4313
 4314
 4315
 4316
 4317
 4318
 4319
 4320
 4321
 4322
 4323
 4324
 4325
 4326
 4327
 4328
 4329
 4330
 4331
 4332
 4333
 4334
 4335
 4336
 4337
 4338
 4339
 4340
 4341
 4342
 4343
 4344
 4345
 4346
 4347
 4348
 4349
 4350
 4351
 4352
 4353
 4354
 4355
 4356
 4357
 4358
 4359
 4360
 4361
 4362
 4363
 4364
 4365
 4366
 4367
 4368
 4369
 4370
 4371
 4372
 4373
 4374
 4375
 4376
 4377
 4378
 4379
 4380
 4381
 4382
 4383
 4384
 4385
 4386
 4387
 4388
 4389
 4390
 4391
 4392
 4393
 4394
 4395
 4396
 4397
 4398
 4399
 4400
 4401
 4402
 4403
 4404
 4405
 4406
 4407
 4408
 4409
 4410
 4411
 4412
 4413
 4414
 4415
 4416
 4417
 4418
 4419
 4420
 4421
 4422
 4423
 4424
 4425
 4426
 4427
 4428
 4429
 4430
 4431
 4432
 4433
 4434
 4435
 4436
 4437
 4438
 4439
 4440
 4441
 4442
 4443
 4444
 4445
 4446
 4447
 4448
 4449
 4450
 4451
 4452
 4453
 4454
 4455
 4456
 4457
 4458
 4459
 4460
 4461
 4462
 4463
 4464
 4465
 4466
 4467
 4468
 4469
 4470
 4471
 4472
 4473
 4474
 4475
 4476
 4477
 4478
 4479
 4480
 4481
 4482
 4483
 4484
 4485
 4486
 4487
 4488
 4489
 4490
 4491
 4492
 4493
 4494
 4495
 4496
 4497
 4498
 4499
 4500
 4501
 4502
 4503
 4504
 4505
 4506
 4507
 4508
 4509
 4510
 4511
 4512
 4513
 4514
 4515
 4516
 4517
 4518
 4519
 4520
 4521
 4522
 4523
 4524
 4525
 4526
 4527
 4528
 4529
 4530
 4531
 4532
 4533
 4534
 4535
 4536
 4537
 4538
 4539
 4540
 4541
 4542
 4543
 4544
 4545
 4546
 4547
 4548
 4549
 4550
 4551
 4552
 4553
 4554
 4555
 4556
 4557
 4558
 4559
 4560
 4561
 4562
 4563
 4564
 4565
 4566
 4567
 4568
 4569
 4570
 4571
 4572
 4573
 4574
 4575
 4576
 4577
 4578
 4579
 4580
 4581
 4582
 4583
 4584
 4585
 4586
 4587
 4588
 4589
 4590
 4591
 4592
 4593
 4594
 4595
 4596
 4597
 4598
 4599
 4600
 4601
 4602
 4603
 4604
 4605
 4606
 4607
 4608
 4609
 4610
 4611
 4612
 4613
 4614
 4615
 4616
 4617
 4618
 4619
 4620
 4621
 4622
 4623
 4624
 4625
 4626
 4627
 4628
 4629
 4630
 4631
 4632
 4633
 4634
 4635
 4636
 4637
 4638
 4639
 4640
 4641
 4642
 4643
 4644
 4645
 4646
 4647
 4648
 4649
 4650
 4651
 4652
 4653
 4654
 4655
 4656
 4657
 4658
 4659
 4660
 4661
 4662
 4663
 4664
 4665
 4666
 4667
 4668
 4669
 4670
 4671
 4672
 4673
 4674
 4675
 4676
 4677
 4678
 4679
 4680
 4681
 4682
 4683
 4684
 4685
 4686
 4687
 4688
 4689
 4690
 4691
 4692
 4693
 4694
 4695
 4696
 4697
 4698
 4699
 4700
 4701
 4702
 4703
 4704
 4705
 4706
 4707
 4708
 4709
 4710
 4711
 4712
 4713
 4714
 4715
 4716
 4717
 4718
 4719
 4720
 4721
 4722
 4723
 4724
 4725
 4726
 4727
 4728
 4729
 4730
 4731
 4732
 4733
 4734
 4735
 4736
 4737
 4738
 4739
 4740
 4741
 4742
 4743
 4744
 4745
 4746
 4747
 4748
 4749
 4750
 4751
 4752
 4753
 4754
 4755
 4756
 4757
 4758
 4759
 4760
 4761
 4762
 4763
 4764
 4765
 4766
 4767
 4768
 4769
 4770
 4771
 4772
 4773
 4774
 4775
 4776
 4777
 4778
 4779
 4780
 4781
 4782
 4783
 4784
 4785
 4786
 4787
 4788
 4789
 4790
 4791
 4792
 4793
 4794
 4795
 4796
 4797
 4798
 4799
 4800
 4801
 4802
 4803
 4804
 4805
 4806
 4807
 4808
 4809
 4810
 4811
 4812
 4813
 4814
 4815
 4816
 4817
 4818
 4819
 4820
 4821
 4822
 4823
 4824
 4825
 4826
 4827
 4828
 4829
 4830
 4831
 4832
 4833
 4834
 4835
 4836
 4837
 4838
 4839
 4840
 4841
 4842
 4843
 4844
 4845
 4846
 4847
 4848
 4849
 4850
 4851
 4852
 4853
 4854
 4855
 4856
 4857
 4858
 4859
 4860
 4861
 4862
 4863
 4864
 4865
 4866
 4867
 4868
 4869
 4870
 4871
 4872
 4873
 4874
 4875
 4876
 4877
 4878
 4879
 4880
 4881
 4882
 4883
 4884
 4885
 4886
 4887
 4888
 4889
 4890
 4891
 4892
 4893
 4894
 4895
 4896
 4897
 4898
 4899
 4900
 4901
 4902
 4903
 4904
 4905
 4906
 4907
 4908
 4909
 4910
 4911
 4912
 4913
 4914
 4915
 4916
 4917
 4918
 4919
 4920
 4921
 4922
 4923
 4924
 4925
 4926
 4927
 4928
 4929
 4930
 4931
 4932
 4933
 4934
 4935
 4936
 4937
 4938
 4939
 4940
 4941
 4942
 4943
 4944
 4945
 4946
 4947
 4948
 4949
 4950
 4951
 4952
 4953
 4954
 4955
 4956
 4957
 4958
 4959
 4960
 4961
 4962
 4963
 4964
 4965
 4966
 4967
 4968
 4969
 4970
 4971
 4972
 4973
 4974
 4975
 4976
 4977
 4978
 4979
 4980
 4981
 4982
 4983
 4984
 4985
 4986
 4987
 4988
 4989
 4990
 4991
 4992
 4993
 4994
 4995
 4996
 4997
 4998
 4999
 5000
 5001
 5002
 5003
 5004
 5005
 5006
 5007
 5008
 5009
 5010
 5011
 5012
 5013
 5014
 5015
 5016
 5017
 5018
 5019
 5020
 5021
 5022
 5023
 5024
 5025
 5026
 5027
 5028
 5029
 5030
 5031
 5032
 5033
 5034
 5035
 5036
 5037
 5038
 5039
 5040
 5041
 5042
 5043
 5044
 5045
 5046
 5047
 5048
 5049
 5050
 5051
 5052
 5053
 5054
 5055
 5056
 5057
 5058
 5059
 5060
 5061
 5062
 5063
 5064
 5065
 5066
 5067
 5068
 5069
 5070
 5071
 5072
 5073
 5074
 5075
 5076
 5077
 5078
 5079
 5080
 5081
 5082
 5083
 5084
 5085
 5086
 5087
 5088
 5089
 5090
 5091
 5092
 5093
 5094
 5095
 5096
 5097
 5098
 5099
 5100
 5101
 5102
 5103
 5104
 5105
 5106
 5107
 5108
 5109
 5110
 5111
 5112
 5113
 5114
 5115
 5116
 5117
 5118
 5119
 5120
 5121
 5122
 5123
 5124
 5125
 5126
 5127
 5128
 5129
 5130
 5131
 5132
 5133
 5134
 5135
 5136
 5137
 5138
 5139
 5140
 5141
 5142
 5143
 5144
 5145
 5146
 5147
 5148
 5149
 5150
 5151
 5152
 5153
 5154
 5155
 5156
 5157
 5158
 5159
 5160
 5161
 5162
 5163
 5164
 5165
 5166
 5167
 5168
 5169
 5170
 5171
 5172
 5173
 5174
 5175
 5176
 5177
 5178
 5179
 5180
 5181
 5182
 5183
 5184
 5185
 5186
 5187
 5188
 5189
 5190
 5191
 5192
 5193
 5194
 5195
 5196
 5197
 5198
 5199
 5200
 5201
 5202
 5203
 5204
 5205
 5206
 5207
 5208
 5209
 5210
 5211
 5212
 5213
 5214
 5215
 5216
 5217
 5218
 5219
 5220
 5221
 5222
 5223
 5224
 5225
 5226
 5227
 5228
 5229
 5230
 5231
 5232
 5233
 5234
 5235
 5236
 5237
 5238
 5239
 5240
 5241
 5242
 5243
 5244
 5245
 5246
 5247
 5248
 5249
 5250
 5251
 5252
 5253
 5254
 5255
 5256
 5257
 5258
 5259
 5260
 5261
 5262
 5263
 5264
 5265
 5266
 5267
 5268
 5269
 5270
 5271
 5272
 5273
 5274
 5275
 5276
 5277
 5278
 5279
 5280
 5281
 5282
 5283
 5284
 5285
 5286
 5287
 5288
 5289
 5290
 5291
 5292
 5293
 5294
 5295
 5296
 5297
 5298
 5299
 5300
 5301
 5302
 5303
 5304
 5305
 5306
 5307
 5308
 5309
 5310
 5311
 5312
 5313
 5314
 5315
 5316
 5317
 5318
 5319
 5320
 5321
 5322
 5323
 5324
 5325
 5326
 5327
 5328
 5329
 5330
 5331
 5332
 5333
 5334
 5335
 5336
 5337
 5338
 5339
 5340
 5341
 5342
 5343
 5344
 5345
 5346
 5347
 5348
 5349
 5350
 5351
 5352
 5353
 5354
 5355
 5356
 5357
 5358
 5359
 5360
 5361
 5362
 5363
 5364
 5365
 5366
 5367
 5368
 5369
 5370
 5371
 5372
 5373
 5374
 5375
 5376
 5377
 5378
 5379
 5380
 5381
 5382
 5383
 5384
 5385
 5386
 5387
 5388
 5389
 5390
 5391
 5392
 5393
 5394
 5395
 5396
 5397
 5398
 5399
 5400
 5401
 5402
 5403
 5404
 5405
 5406
 5407
 5408
 5409
 5410
 5411
 5412
 5413
 5414
 5415
 5416
 5417
 5418
 5419
 5420
 5421
 5422
 5423
 5424
 5425
 5426
 5427
 5428
 5429
 5430
 5431
 5432
 5433
 5434
 5435
 5436
 5437
 5438
 5439
 5440
 5441
 5442
 5443
 5444
 5445
 5446
 5447
 5448
 5449
 5450
 5451
 5452
 5453
 5454
 5455
 5456
 5457
 5458
 5459
 5460
 5461
 5462
 5463
 5464
 5465
 5466
 5467
 5468
 5469
 5470
 5471
 5472
 5473
 5474
 5475
 5476
 5477
 5478
 5479
 5480
 5481
 5482
 5483
 5484
 5485
 5486
 5487
 5488
 5489
 5490
 5491
 5492
 5493
 5494
 5495
 5496
 5497
 5498
 5499
 5500
 5501
 5502
 5503
 5504
 5505
 5506
 5507
 5508
 5509
 5510
 5511
 5512
 5513
 5514
 5515
 5516
 5517
 5518
 5519
 5520
 5521
 5522
 5523
 5524
 5525
 5526
 5527
 5528
 5529
 5530
 5531
 5532
 5533
 5534
 5535
 5536
 5537
 5538
 5539
 5540
 5541
 5542
 5543
 5544
 5545
 5546
 5547
 5548
 5549
 5550
 5551
 5552
 5553
 5554
 5555
 5556
 5557
 5558
 5559
 5560
 5561
 5562
 5563
 5564
 5565
 5566
 5567
 5568
 5569
 5570
 5571
 5572
 5573
 5574
 5575
 5576
 5577
 5578
 5579
 5580
 5581
 5582
 5583
 5584
 5585
 5586
 5587
 5588
 5589
 5590
 5591
 5592
 5593
 5594
 5595
 5596
 5597
 5598
 5599
 5600
 5601
 5602
 5603
 5604
 5605
 5606
 5607
 5608
 5609
 5610
 5611
 5612
 5613
 5614
 5615
 5616
 5617
 5618
 5619
 5620
 5621
 5622
 5623
 5624
 5625
 5626
 5627
 5628
 5629
 5630
 5631
 5632
 5633
 5634
 5635
 5636
 5637
 5638
 5639
 5640
 5641
 5642
 5643
 5644
 5645
 5646
 5647
 5648
 5649
 5650
 5651
 5652
 5653
 5654
 5655
 5656
 5657
 5658
 5659
 5660
 5661
 5662
 5663
 5664
 5665
 5666
 5667
 5668
 5669
 5670
 5671
 5672
 5673
 5674
 5675
 5676
 5677
 5678
 5679
 5680
 5681
 5682
 5683
 5684
 5685
 5686
 5687
 5688
 5689
 5690
 5691
 5692
 5693
 5694
 5695
 5696
 5697
 5698
 5699
 5700
 5701
 5702
 5703
 5704
 5705
 5706
 5707
 5708
 5709
 5710
 5711
 5712
 5713
 5714
 5715
 5716
 5717
 5718
 5719
 5720
 5721
 5722
 5723
 5724
 5725
 5726
 5727
 5728
 5729
 5730
 5731
 5732
 5733
 5734
 5735
 5736
 5737
 5738
 5739
 5740
 5741
 5742
 5743
 5744
 5745
 5746
 5747
 5748
 5749
 5750
 5751
 5752
 5753
 5754
 5755
 5756
 5757
 5758
 5759
 5760
 5761
 5762
 5763
 5764
 5765
 5766
 5767
 5768
 5769
 5770
 5771
 5772
 5773
 5774
 5775
 5776
 5777
 5778
 5779
 5780
 5781
 5782
 5783
 5784
 5785
 5786
 5787
 5788
 5789
 5790
 5791
 5792
 5793
 5794
 5795
 5796
 5797
 5798
 5799
 5800
 5801
 5802
 5803
 5804
 5805
 5806
 5807
 5808
 5809
 5810
 5811
 5812
 5813
 5814
 5815
 5816
 5817
 5818
 5819
 5820
 5821
 5822
 5823
 5824
 5825
 5826
 5827
 5828
 5829
 5830
 5831
 5832
 5833
 5834
 5835
 5836
 5837
 5838
 5839
 5840
 5841
 5842
 5843
 5844
 5845
 5846
 5847
 5848
 5849
 5850
 5851
 5852
 5853
 5854
 5855
 5856
 5857
 5858
 5859
 5860
 5861
 5862
 5863
 5864
 5865
 5866
 5867
 5868
 5869
 5870
 5871
 5872
 5873
 5874
 5875
 5876
 5877
 5878
 5879
 5880
 5881
 5882
 5883
 5884
 5885
 5886
 5887
 5888
 5889
 5890
 5891
 5892
 5893
 5894
 5895
 5896
 5897
 5898
 5899
 5900
 5901
 5902
 5903
 5904
 5905
 5906
 5907
 5908
 5909
 5910
 5911
 5912
 5913
 5914
 5915
 5916
 5917
 5918
 5919
 5920
 5921
 5922
 5923
 5924
 5925
 5926
 5927
 5928
 5929
 5930
 5931
 5932
 5933
 5934
 5935
 5936
 5937
 5938
 5939
 5940
 5941
 5942
 5943
 5944
 5945
 5946
 5947
 5948
 5949
 5950
 5951
 5952
 5953
 5954
 5955
 5956
 5957
 5958
 5959
 5960
 5961
 5962
 5963
 5964
 5965
 5966
 5967
 5968
 5969
 5970
 5971
 5972
 5973
 5974
 5975
 5976
 5977
 5978
 5979
 5980
 5981
 5982
 5983
 5984
 5985
 5986
 5987
 5988
 5989
 5990
 5991
 5992
 5993
 5994
 5995
 5996
 5997
 5998
 5999
 6000
 6001
 6002
 6003
 6004
 6005
 6006
 6007
 6008
 6009
 6010
 6011
 6012
 6013
 6014
 6015
 6016
 6017
 6018
 6019
 6020
 6021
 6022
 6023
 6024
 6025
 6026
 6027
 6028
 6029
 6030
 6031
 6032
 6033
 6034
 6035
 6036
 6037
 6038
 6039
 6040
 6041
 6042
 6043
 6044
 6045
 6046
 6047
 6048
 6049
 6050
 6051
 6052
 6053
 6054
 6055
 6056
 6057
 6058
 6059
 6060
 6061
 6062
 6063
 6064
 6065
 6066
 6067
 6068
 6069
 6070
 6071
 6072
 6073
 6074
 6075
 6076
 6077
 6078
 6079
 6080
 6081
 6082
 6083
 6084
 6085
 6086
 6087
 6088
 6089
 6090
 6091
 6092
 6093
 6094
 6095
 6096
 6097
 6098
 6099
 6100
 6101
 6102
 6103
 6104
 6105
 6106
 6107
 6108
 6109
 6110
 6111
 6112
 6113
 6114
 6115
 6116
 6117
 6118
 6119
 6120
 6121
 6122
 6123
 6124
 6125
 6126
 6127
 6128
 6129
 6130
 6131
 6132
 6133
 6134
 6135
 6136
 6137
 6138
 6139
 6140
 6141
 6142
 6143
 6144
 6145
 6146
 6147
 6148
 6149
 6150
 6151
 6152
 6153
 6154
 6155
 6156
 6157
 6158
 6159
 6160
 6161
 6162
 6163
 6164
 6165
 6166
 6167
 6168
 6169
 6170
 6171
 6172
 6173
 6174
 6175
 6176
 6177
 6178
 6179
 6180
 6181
 6182
 6183
 6184
 6185
 6186
 6187
 6188
 6189
 6190
 6191
 6192
 6193
 6194
 6195
 6196
 6197
 6198
 6199
 6200
 6201
 6202
 6203
 6204
 6205
 6206
 6207
 6208
 6209
 6210
 6211
 6212
 6213
 6214
 6215
 6216
 6217
 6218
 6219
 6220
 6221
 6222
 6223
 6224
 6225
 6226
 6227
 6228
 6229
 6230
 6231
 6232
 6233
 6234
 6235
 6236
 6237
 6238
 6239
 6240
 6241
 6242
 6243
 6244
 6245
 6246
 6247
 6248
 6249
 6250
 6251
 6252
 6253
 6254
 6255
 6256
 6257
 6258
 6259
 6260
 6261
 6262
 6263
 6264
 6265
 6266
 6267
 6268
 6269
 6270
 6271
 6272
 6273
 6274
 6275
 6276
 6277
 6278
 6279
 6280
 6281
 6282
 6283
 6284
 6285
 6286
 6287
 6288
 6289
 6290
 6291
 6292
 6293
 6294
 6295
 6296
 6297
 6298
 6299
 6300
 6301
 6302
 6303
 6304
 6305
 6306
 6307
 6308
 6309
 6310
 6311
 6312
 6313
 6314
 6315
 6316
 6317
 6318
 6319
 6320
 6321
 6322
 6323
 6324
 6325
 6326
 6327
 6328
 6329
 6330
 6331
 6332
 6333
 6334
 6335
 6336
 6337
 6338
 6339
 6340
 6341
 6342
 6343
 6344
 6345
 6346
 6347
 6348
 6349
 6350
 6351
 6352
 6353
 6354
 6355
 6356
 6357
 6358
 6359
 6360
 6361
 6362
 6363
 6364
 6365
 6366
 6367
 6368
 6369
 6370
 6371
 6372
 6373
 6374
 6375
 6376
 6377
 6378
 6379
 6380
 6381
 6382
 6383
 6384
 6385
 6386
 6387
 6388
 6389
 6390
 6391
 6392
 6393
 6394
 6395
 6396
 6397
 6398
 6399
 6400
 6401
 6402
 6403
 6404
 6405
 6406
 6407
 6408
 6409
 6410
 6411
 6412
 6413
 6414
 6415
 6416
 6417
 6418
 6419
 6420
 6421
 6422
 6423
 6424
 6425
 6426
 6427
 6428
 6429
 6430
 6431
 6432
 6433
 6434
 6435
 6436
 6437
 6438
 6439
 6440
 6441
 6442
 6443
 6444
 6445
 6446
 6447
 6448
 6449
 6450
 6451
 6452
 6453
 6454
 6455
 6456
 6457
 6458
 6459
 6460
 6461
 6462
 6463
 6464
 6465
 6466
 6467
 6468
 6469
 6470
 6471
 6472
 6473
 6474
 6475
 6476
 6477
 6478
 6479
 6480
 6481
 6482
 6483
 6484
 6485
 6486
 6487
 6488
 6489
 6490
 6491
 6492
 6493
 6494
 6495
 6496
 6497
 6498
 6499
 6500
 6501
 6502
 6503
 6504
 6505
 6506
 6507
 6508
 6509
 6510
 6511
 6512
 6513
 6514
 6515
 6516
 6517
 6518
 6519
 6520
 6521
 6522
 6523
 6524
 6525
 6526
 6527
 6528
 6529
 6530
 6531
 6532
 6533
 6534
 6535
 6536
 6537
 6538
 6539
 6540
 6541
 6542
 6543
 6544
 6545
 6546
 6547
 6548
 6549
 6550
 6551
 6552
 6553
 6554
 6555
 6556
 6557
 6558
 6559
 6560
 6561
 6562
 6563
 6564
 6565
 6566
 6567
 6568
 6569
 6570
 6571
 6572
 6573
 6574
 6575
 6576
 6577
 6578
 6579
 6580
 6581
 6582
 6583
 6584
 6585
 6586
 6587
 6588
 6589
 6590
 6591
 6592
 6593
 6594
 6595
 6596
 6597
 6598
 6599
 6600
 6601
 6602
 6603
 6604
 6605
 6606
 6607
 6608
 6609
 6610
 6611
 6612
 6613
 6614
 6615
 6616
 6617
 6618
 6619
 6620
 6621
 6622
 6623
 6624
 6625
 6626
 6627
 6628
 6629
 6630
 6631
 6632
 6633
 6634
 6635
 6636
 6637
 6638
 6639
 6640
 6641
 6642
 6643
 6644
 6645
 6646
 6647
 6648
 6649
 6650
 6651
 6652
 6653
 6654
 6655
 6656
 6657
 6658
 6659
 6660
 6661
 6662
 6663
 6664
 6665
 6666
 6667
 6668
 6669
 6670
 6671
 6672
 6673
 6674
 6675
 6676
 6677
 6678
 6679
 6680
 6681
 6682
 6683
 6684
 6685
 6686
 6687
 6688
 6689
 6690
 6691
 6692
 6693
 6694
 6695
 6696
 6697
 6698
 6699
 6700
 6701
 6702
 6703
 6704
 6705
 6706
 6707
 6708
 6709
 6710
 6711
 6712
 6713
 6714
 6715
 6716
 6717
 6718
 6719
 6720
 6721
 6722
 6723
 6724
 6725
 6726
 6727
 6728
 6729
 6730
 6731
 6732
 6733
 6734
 6735
 6736
 6737
 6738
 6739
 6740
 6741
 6742
 6743
 6744
 6745
 6746
 6747
 6748
 6749
 6750
 6751
 6752
 6753
 6754
 6755
 6756
 6757
 6758
 6759
 6760
 6761
 6762
 6763
 6764
 6765
 6766
 6767
 6768
 6769
 6770
 6771
 6772
 6773
 6774
 6775
 6776
 6777
 6778
 6779
 6780
 6781
 6782
 6783
 6784
 6785
 6786
 6787
 6788
 6789
 6790
 6791
 6792
 6793
 6794
 6795
 6796
 6797
 6798
 6799
 6800
 6801
 6802
 6803
 6804
 6805
 6806
 6807
 6808
 6809
 6810
 6811
 6812
 6813
 6814
 6815
 6816
 6817
 6818
 6819
 6820
 6821
 6822
 6823
 6824
 6825
 6826
 6827
 6828
 6829
 6830
 6831
 6832
 6833
 6834
 6835
 6836
 6837
 6838
 6839
 6840
 6841
 6842
 6843
 6844
 6845
 6846
 6847
 6848
 6849
 6850
 6851
 6852
 6853
 6854
 6855
 6856
 6857
 6858
 6859
 6860
 6861
 6862
 6863
 6864
 6865
 6866
 6867
 6868
 6869
 6870
 6871
 6872
 6873
 6874
 6875
 6876
 6877
 6878
 6879
 6880
 6881
 6882
 6883
 6884
 6885
 6886
 6887
 6888
 6889
 6890
 6891
 6892
 6893
 6894
 6895
 6896
 6897
 6898
 6899
 6900
 6901
 6902
 6903
 6904
 6905
 6906
 6907
 6908
 6909
 6910
 6911
 6912
 6913
 6914
 6915
 6916
 6917
 6918
 6919
 6920
 6921
 6922
 6923
 6924
 6925
 6926
 6927
 6928
 6929
 6930
 6931
 6932
 6933
 6934
 6935
 6936
 6937
 6938
 6939
 6940
 6941
 6942
 6943
 6944
 6945
 6946
 6947
 6948
 6949
 6950
 6951
 6952
 6953
 6954
 6955
 6956
 6957
 6958
 6959
 6960
 6961
 6962
 6963
 6964
 6965
 6966
 6967
 6968
 6969
 6970
 6971
 6972
 6973
 6974
 6975
 6976
 6977
 6978
 6979
 6980
 6981
 6982
 6983
 6984
 6985
 6986
 6987
 6988
 6989
 6990
 6991
 6992
 6993
 6994
 6995
 6996
 6997
 6998
 6999
 7000
 7001
 7002
 7003
 7004
 7005
 7006
 7007
 7008
 7009
 7010
 7011
 7012
 7013
 7014
 7015
 7016
 7017
 7018
 7019
 7020
 7021
 7022
 7023
 7024
 7025
 7026
 7027
 7028
 7029
 7030
 7031
 7032
 7033
 7034
 7035
 7036
 7037
 7038
 7039
 7040
 7041
 7042
 7043
 7044
 7045
 7046
 7047
 7048
 7049
 7050
 7051
 7052
 7053
 7054
 7055
 7056
 7057
 7058
 7059
 7060
 7061
 7062
 7063
 7064
 7065
 7066
 7067
 7068
 7069
 7070
 7071
 7072
 7073
 7074
 7075
 7076
 7077
 7078
 7079
 7080
 7081
 7082
 7083
 7084
 7085
 7086
 7087
 7088
 7089
 7090
 7091
 7092
 7093
 7094
 7095
 7096
 7097
 7098
 7099
 7100
 7101
 7102
 7103
 7104
 7105
 7106
 7107
 7108
 7109
 7110
 7111
 7112
 7113
 7114
 7115
 7116
 7117
 7118
 7119
 7120
 7121
 7122
 7123
 7124
 7125
 7126
 7127
 7128
 7129
 7130
 7131
 7132
 7133
 7134
 7135
 7136
 7137
 7138
 7139
 7140
 7141
 7142
 7143
 7144
 7145
 7146
 7147
 7148
 7149
 7150
 7151
 7152
 7153
 7154
 7155
 7156
 7157
 7158
 7159
 7160
 7161
 7162
 7163
 7164
 7165
 7166
 7167
 7168
 7169
 7170
 7171
 7172
 7173
 7174
 7175
 7176
 7177
 7178
 7179
 7180
 7181
 7182
 7183
 7184
 7185
 7186
 7187
 7188
 7189
 7190
 7191
 7192
 7193
 7194
 7195
 7196
 7197
 7198
 7199
 7200
 7201
 7202
 7203
 7204
 7205
 7206
 7207
 7208
 7209
 7210
 7211
 7212
 7213
 7214
 7215
 7216
 7217
 7218
 7219
 7220
 7221
 7222
 7223
 7224
 7225
 7226
 7227
 7228
 7229
 7230
 7231
 7232
 7233
 7234
 7235
 7236
 7237
 7238
 7239
 7240
 7241
 7242
 7243
 7244
 7245
 7246
 7247
 7248
 7249
 7250
 7251
 7252
 7253
 7254
 7255
 7256
 7257
 7258
 7259
 7260
 7261
 7262
 7263
 7264
 7265
 7266
 7267
 7268
 7269
 7270
 7271
 7272
 7273
 7274
 7275
 7276
 7277
 7278
 7279
 7280
 7281
 7282
 7283
 7284
 7285
 7286
 7287
 7288
 7289
 7290
 7291
 7292
 7293
 7294
 7295
 7296
 7297
 7298
 7299
 7300
 7301
 7302
 7303
 7304
 7305
 7306
 7307
 7308
 7309
 7310
 7311
 7312
 7313
 7314
 7315
 7316
 7317
 7318
 7319
 7320
 7321
 7322
 7323
 7324
 7325
 7326
 7327
 7328
 7329
 7330
 7331
 7332
 7333
 7334
 7335
 7336
 7337
 7338
 7339
 7340
 7341
 7342
 7343
 7344
 7345
 7346
 7347
 7348
 7349
 7350
 7351
 7352
 7353
 7354
 7355
 7356
 7357
 7358
 7359
 7360
 7361
 7362
 7363
 7364
 7365
 7366
 7367
 7368
 7369
 7370
 7371
 7372
 7373
 7374
 7375
 7376
 7377
 7378
 7379
 7380
 7381
 7382
 7383
 7384
 7385
 7386
 7387
 7388
 7389
 7390
 7391
 7392
 7393
 7394
 7395
 7396
 7397
 7398
 7399
 7400
 7401
 7402
 7403
 7404
 7405
 7406
 7407
 7408
 7409
 7410
 7411
 7412
 7413
 7414
 7415
 7416
 7417
 7418
 7419
 7420
 7421
 7422
 7423
 7424
 7425
 7426
 7427
 7428
 7429
 7430
 7431
 7432
 7433
 7434
 7435
 7436
 7437
 7438
 7439
 7440
 7441
 7442
 7443
 7444
 7445
 7446
 7447
 7448
 7449
 7450
 7451
 7452
 7453
 7454
 7455
 7456
 7457
 7458
 7459
 7460
 7461
 7462
 7463
 7464
 7465
 7466
 7467
 7468
 7469
 7470
 7471
 7472
 7473
 7474
 7475
 7476
 7477
 7478
 7479
 7480
 7481
 7482
 7483
 7484
 7485
 7486
 7487
 7488
 7489
 7490
 7491
 7492
 7493
 7494
 7495
 7496
 7497
 7498
 7499
 7500
 7501
 7502
 7503
 7504
 7505
 7506
 7507
 7508
 7509
 7510
 7511
 7512
 7513
 7514
 7515
 7516
 7517
 7518
 7519
 7520
 7521
 7522
 7523
 7524
 7525
 7526
 7527
 7528
 7529
 7530
 7531
 7532
 7533
 7534
 7535
 7536
 7537
 7538
 7539
 7540
 7541
 7542
 7543
 7544
 7545
 7546
 7547
 7548
 7549
 7550
 7551
 7552
 7553
 7554
 7555
 7556
 7557
 7558
 7559
 7560
 7561
 7562
 7563
 7564
 7565
 7566
 7567
 7568
 7569
 7570
 7571
 7572
 7573
 7574
 7575
 7576
 7577
 7578
 7579
 7580
 7581
 7582
 7583
 7584
 7585
 7586
 7587
 7588
 7589
 7590
 7591
 7592
 7593
 7594
 7595
 7596
 7597
 7598
 7599
 7600
 7601
 7602
 7603
 7604
 7605
 7606
 7607
 7608
 7609
 7610
 7611
 7612
 7613
 7614
 7615
 7616
 7617
 7618
 7619
 7620
 7621
 7622
 7623
 7624
 7625
 7626
 7627
 7628
 7629
 7630
 7631
 7632
 7633
 7634
 7635
 7636
 7637
 7638
 7639
 7640
 7641
 7642
 7643
 7644
 7645
 7646
 7647
 7648
 7649
 7650
 7651
 7652
 7653
 7654
 7655
 7656
 7657
 7658
 7659
 7660
 7661
 7662
 7663
 7664
 7665
 7666
 7667
 7668
 7669
 7670
 7671
 7672
 7673
 7674
 7675
 7676
 7677
 7678
 7679
 7680
 7681
 7682
 7683
 7684
 7685
 7686
 7687
 7688
 7689
 7690
 7691
 7692
 7693
 7694
 7695
 7696
 7697
 7698
 7699
 7700
 7701
 7702
 7703
 7704
 7705
 7706
 7707
 7708
 7709
 7710
 7711
 7712
 7713
 7714
 7715
 7716
 7717
 7718
 7719
 7720
 7721
 7722
 7723
 7724
 7725
 7726
 7727
 7728
 7729
 7730
 7731
 7732
 7733
 7734
 7735
 7736
 7737
 7738
 7739
 7740
 7741
 7742
 7743
 7744
 7745
 7746
 7747
 7748
 7749
 7750
 7751
 7752
 7753
 7754
 7755
 7756
 7757
 7758
 7759
 7760
 7761
 7762
 7763
 7764
 7765
 7766
 7767
 7768
 7769
 7770
 7771
 7772
 7773
 7774
 7775
 7776
 7777
 7778
 7779
 7780
 7781
 7782
 7783
 7784
 7785
 7786
 7787
 7788
 7789
 7790
 7791
 7792
 7793
 7794
 7795
 7796
 7797
 7798
 7799
 7800
 7801
 7802
 7803
 7804
 7805
 7806
 7807
 7808
 7809
 7810
 7811
 7812
 7813
 7814
 7815
 7816
 7817
 7818
 7819
 7820
 7821
 7822
 7823
 7824
 7825
 7826
 7827
 7828
 7829
 7830
 7831
 7832
 7833
 7834
 7835
 7836
 7837
 7838
 7839
 7840
 7841
 7842
 7843
 7844
 7845
 7846
 7847
 7848
 7849
 7850
 7851
 7852
 7853
 7854
 7855
 7856
 7857
 7858
 7859
 7860
 7861
 7862
 7863
 7864
 7865
 7866
 7867
 7868
 7869
 7870
 7871
 7872
 7873
 7874
 7875
 7876
 7877
 7878
 7879
 7880
 7881
 7882
 7883
 7884
 7885
 7886
 7887
 7888
 7889
 7890
 7891
 7892
 7893
 7894
 7895
 7896
 7897
 7898
 7899
 7900
 7901
 7902
 7903
 7904
 7905
 7906
 7907
 7908
 7909
 7910
 7911
 7912
 7913
 7914
 7915
 7916
 7917
 7918
 7919
 7920
 7921
 7922
 7923
 7924
 7925
 7926
 7927
 7928
 7929
 7930
 7931
 7932
 7933
 7934
 7935
 7936
 7937
 7938
 7939
 7940
 7941
 7942
 7943
 7944
 7945
 7946
 7947
 7948
 7949
 7950
 7951
 7952
 7953
 7954
 7955
 7956
 7957
 7958
 7959
 7960
 7961
 7962
 7963
 7964
 7965
 7966
 7967
 7968
 7969
 7970
 7971
 7972
 7973
 7974
 7975
 7976
 7977
 7978
 7979
 7980
 7981
 7982
 7983
 7984
 7985
 7986
 7987
 7988
 7989
 7990
 7991
 7992
 7993
 7994
 7995
 7996
 7997
 7998
 7999
 8000
 8001
 8002
 8003
 8004
 8005
 8006
 8007
 8008
 8009
 8010
 8011
 8012
 8013
 8014
 8015
 8016
 8017
 8018
 8019
 8020
 8021
 8022
 8023
 8024
 8025
 8026
 8027
 8028
 8029
 8030
 8031
 8032
 8033
 8034
 8035
 8036
 8037
 8038
 8039
 8040
 8041
 8042
 8043
 8044
 8045
 8046
 8047
 8048
 8049
 8050
 8051
 8052
 8053
 8054
 8055
 8056
 8057
 8058
 8059
 8060
 8061
 8062
 8063
 8064
 8065
 8066
 8067
 8068
 8069
 8070
 8071
 8072
 8073
 8074
 8075
 8076
 8077
 8078
 8079
 8080
 8081
 8082
 8083
 8084
 8085
 8086
 8087
 8088
 8089
 8090
 8091
 8092
 8093
 8094
 8095
 8096
 8097
 8098
 8099
 8100
 8101
 8102
 8103
 8104
 8105
 8106
 8107
 8108
 8109
 8110
 8111
 8112
 8113
 8114
 8115
 8116
 8117
 8118
 8119
 8120
 8121
 8122
 8123
 8124
 8125
 8126
 8127
 8128
 8129
 8130
 8131
 8132
 8133
 8134
 8135
 8136
 8137
 8138
 8139
 8140
 8141
 8142
 8143
 8144
 8145
 8146
 8147
 8148
 8149
 8150
 8151
 8152
 8153
 8154
 8155
 8156
 8157
 8158
 8159
 8160
 8161
 8162
 8163
 8164
 8165
 8166
 8167
 8168
 8169
 8170
 8171
 8172
 8173
 8174
 8175
 8176
 8177
 8178
 8179
 8180
 8181
 8182
 8183
 8184
 8185
 8186
 8187
 8188
 8189
 8190
 8191
 8192
 8193
 8194
 8195
 8196
 8197
 8198
 8199
 8200
 8201
 8202
 8203
 8204
 8205
 8206
 8207
 8208
 8209
 8210
 8211
 8212
 8213
 8214
 8215
 8216
 8217
 8218
 8219
 8220
 8221
 8222
 8223
 8224
 8225
 8226
 8227
 8228
 8229
 8230
 8231
 8232
 8233
 8234
 8235
 8236
 8237
 8238
 8239
 8240
 8241
 8242
 8243
 8244
 8245
 8246
 8247
 8248
 8249
 8250
 8251
 8252
 8253
 8254
 8255
 8256
 8257
 8258
 8259
 8260
 8261
 8262
 8263
 8264
 8265
 8266
 8267
 8268
 8269
 8270
 8271
 8272
 8273
 8274
 8275
 8276
 8277
 8278
 8279
 8280
 8281
 8282
 8283
 8284
 8285
 8286
 8287
 8288
 8289
 8290
 8291
 8292
 8293
 8294
 8295
 8296
 8297
 8298
 8299
 8300
 8301
 8302
 8303
 8304
 8305
 8306
 8307
 8308
 8309
 8310
 8311
 8312
 8313
 8314
 8315
 8316
 8317
 8318
 8319
 8320
 8321
 8322
 8323
 8324
 8325
 8326
 8327
 8328
 8329
 8330
 8331
 8332
 8333
 8334
 8335
 8336
 8337
 8338
 8339
 8340
 8341
 8342
 8343
 8344
 8345
 8346
 8347
 8348
 8349
 8350
 8351
 8352
 8353
 8354
 8355
 8356
 8357
 8358
 8359
 8360
 8361
 8362
 8363
 8364
 8365
 8366
 8367
 8368
 8369
 8370
 8371
 8372
 8373
 8374
 8375
 8376
 8377
 8378
 8379
 8380
 8381
 8382
 8383
 8384
 8385
 8386
 8387
 8388
 8389
 8390
 8391
 8392
 8393
 8394
 8395
 8396
 8397
 8398
 8399
 8400
 8401
 8402
 8403
 8404
 8405
 8406
 8407
 8408
 8409
 8410
 8411
 8412
 8413
 8414
 8415
 8416
 8417
 8418
 8419
 8420
 8421
 8422
 8423
 8424
 8425
 8426
 8427
 8428
 8429
 8430
 8431
 8432
 8433
 8434
 8435
 8436
 8437
 8438
 8439
 8440
 8441
 8442
 8443
 8444
 8445
 8446
 8447
 8448
 8449
 8450
 8451
 8452
 8453
 8454
 8455
 8456
 8457
 8458
 8459
 8460
 8461
 8462
 8463
 8464
 8465
 8466
 8467
 8468
 8469
 8470
 8471
 8472
 8473
 8474
 8475
 8476
 8477
 8478
 8479
 8480
 8481
 8482
 8483
 8484
 8485
 8486
 8487
 8488
 8489
 8490
 8491
 8492
 8493
 8494
 8495
 8496
 8497
 8498
 8499
 8500
 8501
 8502
 8503
 8504
 8505
 8506
 8507
 8508
 8509
 8510
 8511
 8512
 8513
 8514
 8515
 8516
 8517
 8518
 8519
 8520
 8521
 8522
 8523
 8524
 8525
 8526
 8527
 8528
 8529
 8530
 8531
 8532
 8533
 8534
 8535
 8536
 8537
 8538
 8539
 8540
 8541
 8542
 8543
 8544
 8545
 8546
 8547
 8548
 8549
 8550
 8551
 8552
 8553
 8554
 8555
 8556
 8557
 8558
 8559
 8560
 8561
 8562
 8563
 8564
 8565
 8566
 8567
 8568
 8569
 8570
 8571
 8572
 8573
 8574
 8575
 8576
 8577
 8578
 8579
 8580
 8581
 8582
 8583
 8584
 8585
 8586
 8587
 8588
 8589
 8590
 8591
 8592
 8593
 8594
 8595
 8596
 8597
 8598
 8599
 8600
 8601
 8602
 8603
 8604
 8605
 8606
 8607
 8608
 8609
 8610
 8611
 8612
 8613
 8614
 8615
 8616
 8617
 8618
 8619
 8620
 8621
 8622
 8623
 8624
 8625
 8626
 8627
 8628
 8629
 8630
 8631
 8632
 8633
 8634
 8635
 8636
 8637
 8638
 8639
 8640
 8641
 8642
 8643
 8644
 8645
 8646
 8647
 8648
 8649
 8650
 8651
 8652
 8653
 8654
 8655
 8656
 8657
 8658
 8659
 8660
 8661
 8662
 8663
 8664
 8665
 8666
 8667
 8668
 8669
 8670
 8671
 8672
 8673
 8674
 8675
 8676
 8677
 8678
 8679
 8680
 8681
 8682
 8683
 8684
 8685
 8686
 8687
 8688
 8689
 8690
 8691
 8692
 8693
 8694
 8695
 8696
 8697
 8698
 8699
 8700
 8701
 8702
 8703
 8704
 8705
 8706
 8707
 8708
 8709
 8710
 8711
 8712
 8713
 8714
 8715
 8716
 8717
 8718
 8719
 8720
 8721
 8722
 8723
 8724
 8725
 8726
 8727
 8728
 8729
 8730
 8731
 8732
 8733
 8734
 8735
 8736
 8737
 8738
 8739
 8740
 8741
 8742
 8743
 8744
 8745
 8746
 8747
 8748
 8749
 8750
 8751
 8752
 8753
 8754
 8755
 8756
 8757
 8758
 8759
 8760
 8761
 8762
 8763
 8764
 8765
 8766
 8767
 8768
 8769
 8770
 8771
 8772
 8773
 8774
 8775
 8776
 8777
 8778
 8779
 8780
 8781
 8782
 8783
 8784
 8785
 8786
 8787
 8788
 8789
 8790
 8791
 8792
 8793
 8794
 8795
 8796
 8797
 8798
 8799
 8800
 8801
 8802
 8803
 8804
 8805
 8806
 8807
 8808
 8809
 8810
 8811
 8812
 8813
 8814
 8815
 8816
 8817
 8818
 8819
 8820
 8821
 8822
 8823
 8824
 8825
 8826
 8827
 8828
 8829
 8830
 8831
 8832
 8833
 8834
 8835
 8836
 8837
 8838
 8839
 8840
 8841
 8842
 8843
 8844
 8845
 8846
 8847
 8848
 8849
 8850
 8851
 8852
 8853
 8854
 8855
 8856
 8857
 8858
 8859
 8860
 8861
 8862
 8863
 8864
 8865
 8866
 8867
 8868
 8869
 8870
 8871
 8872
 8873
 8874
 8875
 8876
 8877
 8878
 8879
 8880
 8881
 8882
 8883
 8884
 8885
 8886
 8887
 8888
 8889
 8890
 8891
 8892
 8893
 8894
 8895
 8896
 8897
 8898
 8899
 8900
 8901
 8902
 8903
 8904
 8905
 8906
 8907
 8908
 8909
 8910
 8911
 8912
 8913
 8914
 8915
 8916
 8917
 8918
 8919
 8920
 8921
 8922
 8923
 8924
 8925
 8926
 8927
 8928
 8929
 8930
 8931
 8932
 8933
 8934
 8935
 8936
 8937
 8938
 8939
 8940
 8941
 8942
 8943
 8944
 8945
 8946
 8947
 8948
 8949
 8950
 8951
 8952
 8953
 8954
 8955
 8956
 8957
 8958
 8959
 8960
 8961
 8962
 8963
 8964
 8965
 8966
 8967
 8968
 8969
 8970
 8971
 8972
 8973
 8974
 8975
 8976
 8977
 8978
 8979
 8980
 8981
 8982
 8983
 8984
 8985
 8986
 8987
 8988
 8989
 8990
 8991
 8992
 8993
 8994
 8995
 8996
 8997
 8998
 8999
 9000
 9001
 9002
 9003
 9004
 9005
 9006
 9007
 9008
 9009
 9010
 9011
 9012
 9013
 9014
 9015
 9016
 9017
 9018
 9019
 9020
 9021
 9022
 9023
 9024
 9025
 9026
 9027
 9028
 9029
 9030
 9031
 9032
 9033
 9034
 9035
 9036
 9037
 9038
 9039
 9040
 9041
 9042
 9043
 9044
 9045
 9046
 9047
 9048
 9049
 9050
 9051
 9052
 9053
 9054
 9055
 9056
 9057
 9058
 9059
 9060
 9061
 9062
 9063
 9064
 9065
 9066
 9067
 9068
 9069
 9070
 9071
 9072
 9073
 9074
 9075
 9076
 9077
 9078
 9079
 9080
 9081
 9082
 9083
 9084
 9085
 9086
 9087
 9088
 9089
 9090
 9091
 9092
 9093
 9094
 9095
 9096
 9097
 9098
 9099
 9100
 9101
 9102
 9103
 9104
 9105
 9106
 9107
 9108
 9109
 9110
 9111
 9112
 9113
 9114
 9115
 9116
 9117
 9118
 9119
 9120
 9121
 9122
 9123
 9124
 9125
 9126
 9127
 9128
 9129
 9130
 9131
 9132
 9133
 9134
 9135
 9136
 9137
 9138
 9139
 9140
 9141
 9142
 9143
 9144
 9145
 9146
 9147
 9148
 9149
 9150
 9151
 9152
 9153
 9154
 9155
 9156
 9157
 9158
 9159
 9160
 9161
 9162
 9163
 9164
 9165
 9166
 9167
 9168
 9169
 9170
 9171
 9172
 9173
 9174
 9175
 9176
 9177
 9178
 9179
 9180
 9181
 9182
 9183
 9184
 9185
 9186
 9187
 9188
 9189
 9190
 9191
 9192
 9193
 9194
 9195
 9196
 9197
 9198
 9199
 9200
 9201
 9202
 9203
 9204
 9205
 9206
 9207
 9208
 9209
 9210
 9211
 9212
 9213
 9214
 9215
 9216
 9217
 9218
 9219
 9220
 9221
 9222
 9223
 9224
 9225
 9226
 9227
 9228
 9229
 9230
 9231
 9232
 9233
 9234
 9235
 9236
 9237
 9238
 9239
 9240
 9241
 9242
 9243
 9244
 9245
 9246
 9247
 9248
 9249
 9250
 9251
 9252
 9253
 9254
 9255
 9256
 9257
 9258
 9259
 9260
 9261
 9262
 9263
 9264
 9265
 9266
 9267
 9268
 9269
 9270
 9271
 9272
 9273
 9274
 9275
 9276
 9277
 9278
 9279
 9280
 9281
 9282
 9283
 9284
 9285
 9286
 9287
 9288
 9289
 9290
 9291
 9292
 9293
 9294
 9295
 9296
 9297
 9298
 9299
 9300
 9301
 9302
 9303
 9304
 9305
 9306
 9307
 9308
 9309
 9310
 9311
 9312
 9313
 9314
 9315
 9316
 9317
 9318
 9319
 9320
 9321
 9322
 9323
 9324
 9325
 9326
 9327
 9328
 9329
 9330
 9331
 9332
 9333
 9334
 9335
 9336
 9337
 9338
 9339
 9340
 9341
 9342
 9343
 9344
 9345
 9346
 9347
 9348
 9349
 9350
 9351
 9352
 9353
 9354
 9355
 9356
 9357
 9358
 9359
 9360
 9361
 9362
 9363
 9364
 9365
 9366
 9367
 9368
 9369
 9370
 9371
 9372
 9373
 9374
 9375
 9376
 9377
 9378
 9379
 9380
 9381
 9382
 9383
 9384
 9385
 9386
 9387
 9388
 9389
 9390
 9391
 9392
 9393
 9394
 9395
 9396
 9397
 9398
 9399
 9400
 9401
 9402
 9403
 9404
 9405
 9406
 9407
 9408
 9409
 9410
 9411
 9412
 9413
 9414
 9415
 9416
 9417
 9418
 9419
 9420
 9421
 9422
 9423
 9424
 9425
 9426
 9427
 9428
 9429
 9430
 9431
 9432
 9433
 9434
 9435
 9436
 9437
 9438
 9439
 9440
 9441
 9442
 9443
 9444
 9445
 9446
 9447
 9448
 9449
 9450
 9451
 9452
 9453
 9454
 9455
 9456
 9457
 9458
 9459
 9460
 9461
 9462
 9463
 9464
 9465
 9466
 9467
 9468
 9469
 9470
 9471
 9472
 9473
 9474
 9475
 9476
 9477
 9478
 9479
 9480
 9481
 9482
 9483
 9484
 9485
 9486
 9487
 9488
 9489
 9490
 9491
 9492
 9493
 9494
 9495
 9496
 9497
 9498
 9499
 9500
 9501
 9502
 9503
 9504
 9505
 9506
 9507
 9508
 9509
 9510
 9511
 9512
 9513
 9514
 9515
 9516
 9517
 9518
 9519
 9520
 9521
 9522
 9523
 9524
 9525
 9526
 9527
 9528
 9529
 9530
 9531
 9532
 9533
 9534
 9535
 9536
 9537
 9538
 9539
 9540
 9541
 9542
 9543
 9544
 9545
 9546
 9547
 9548
 9549
 9550
 9551
 9552
 9553
 9554
 9555
 9556
 9557
 9558
 9559
 9560
 9561
 9562
 9563
 9564
 9565
 9566
 9567
 9568
 9569
 9570
 9571
 9572
 9573
 9574
 9575
 9576
 9577
 9578
 9579
 9580
 9581
 9582
 9583
 9584
 9585
 9586
 9587
 9588
 9589
 9590
 9591
 9592
 9593
 9594
 9595
 9596
 9597
 9598
 9599
 9600
 9601
 9602
 9603
 9604
 9605
 9606
 9607
 9608
 9609
 9610
 9611
 9612
 9613
 9614
 9615
 9616
 9617
 9618
 9619
 9620
 9621
 9622
 9623
 9624
 9625
 9626
 9627
 9628
 9629
 9630
 9631
 9632
 9633
 9634
 9635
 9636
 9637
 9638
 9639
 9640
 9641
 9642
 9643
 9644
 9645
 9646
 9647
 9648
 9649
 9650
 9651
 9652
 9653
 9654
 9655
 9656
 9657
 9658
 9659
 9660
 9661
 9662
 9663
 9664
 9665
 9666
 9667
 9668
 9669
 9670
 9671
 9672
 9673
 9674
 9675
 9676
 9677
 9678
 9679
 9680
 9681
 9682
 9683
 9684
 9685
 9686
 9687
 9688
 9689
 9690
 9691
 9692
 9693
 9694
 9695
 9696
 9697
 9698
 9699
 9700
 9701
 9702
 9703
 9704
 9705
 9706
 9707
 9708
 9709
 9710
 9711
 9712
 9713
 9714
 9715
 9716
 9717
 9718
 9719
 9720
 9721
 9722
 9723
 9724
 9725
 9726
 9727
 9728
 9729
 9730
 9731
 9732
 9733
 9734
 9735
 9736
 9737
 9738
 9739
 9740
 9741
 9742
 9743
 9744
 9745
 9746
 9747
 9748
 9749
 9750
 9751
 9752
 9753
 9754
 9755
 9756
 9757
 9758
 9759
 9760
 9761
 9762
 9763
 9764
 9765
 9766
 9767
 9768
 9769
 9770
 9771
 9772
 9773
 9774
 9775
 9776
 9777
 9778
 9779
 9780
 9781
 9782
 9783
 9784
 9785
 9786
 9787
 9788
 9789
 9790
 9791
 9792
 9793
 9794
 9795
 9796
 9797
 9798
 9799
 9800
 9801
 9802
 9803
 9804
 9805
 9806
 9807
 9808
 9809
 9810
 9811
 9812
 9813
 9814
 9815
 9816
 9817
 9818
 9819
 9820
 9821
 9822
 9823
 9824
 9825
 9826
 9827
 9828
 9829
 9830
 9831
 9832
 9833
 9834
 9835
 9836
 9837
 9838
 9839
 9840
 9841
 9842
 9843
 9844
 9845
 9846
 9847
 9848
 9849
 9850
 9851
 9852
 9853
 9854
 9855
 9856
 9857
 9858
 9859
 9860
 9861
 9862
 9863
 9864
 9865
 9866
 9867
 9868
 9869
 9870
 9871
 9872
 9873
 9874
 9875
 9876
 9877
 9878
 9879
 9880
 9881
 9882
 9883
 9884
 9885
 9886
 9887
 9888
 9889
 9890
 9891
 9892
 9893
 9894
 9895
 9896
 9897
 9898
 9899
 9900
 9901
 9902
 9903
 9904
 9905
 9906
 9907
 9908
 9909
 9910
 9911
 9912
 9913
 9914
 9915
 9916
 9917
 9918
 9919
 9920
 9921
 9922
 9923
 9924
 9925
 9926
 9927
 9928
 9929
 9930
 9931
 9932
 9933
 9934
 9935
 9936
 9937
 9938
 9939
 9940
 9941
 9942
 9943
 9944
 9945
 9946
 9947
 9948
 9949
 9950
 9951
 9952
 9953
 9954
 9955
 9956
 9957
 9958
 9959
 9960
 9961
 9962
 9963
 9964
 9965
 9966
 9967
 9968
 9969
 9970
 9971
 9972
 9973
 9974
 9975
 9976
 9977
 9978
 9979
 9980
 9981
 9982
 9983
 9984
 9985
 9986
 9987
 9988
 9989
 9990
 9991
 9992
 9993
 9994
 9995
 9996
 9997
 9998
 9999
10000
10001
10002
10003
10004
10005
10006
10007
10008
10009
10010
10011
10012
10013
10014
10015
10016
10017
10018
10019
10020
10021
10022
10023
10024
10025
10026
10027
10028
10029
10030
10031
10032
10033
10034
10035
10036
10037
10038
10039
10040
10041
10042
10043
10044
10045
10046
10047
10048
10049
10050
10051
10052
10053
10054
10055
10056
10057
10058
10059
10060
10061
10062
10063
10064
10065
10066
10067
10068
10069
10070
10071
10072
10073
10074
10075
10076
10077
10078
10079
10080
10081
10082
10083
10084
10085
10086
10087
10088
10089
10090
10091
10092
10093
10094
10095
10096
10097
10098
10099
10100
10101
10102
10103
10104
10105
10106
10107
10108
10109
10110
10111
10112
10113
10114
10115
10116
10117
10118
10119
10120
10121
10122
10123
10124
10125
10126
10127
10128
10129
10130
10131
10132
10133
10134
10135
10136
10137
10138
10139
10140
10141
10142
10143
10144
10145
10146
10147
10148
10149
10150
10151
10152
10153
10154
10155
10156
10157
10158
10159
10160
10161
10162
10163
10164
10165
10166
10167
10168
10169
10170
10171
10172
10173
10174
10175
10176
10177
10178
10179
10180
10181
10182
10183
10184
10185
10186
10187
10188
10189
10190
10191
10192
10193
10194
10195
10196
10197
10198
10199
10200
10201
10202
10203
10204
10205
10206
10207
10208
10209
10210
10211
10212
10213
10214
10215
10216
10217
10218
10219
10220
10221
10222
10223
10224
10225
10226
10227
10228
10229
10230
10231
10232
10233
10234
10235
10236
10237
10238
10239
10240
10241
10242
10243
10244
10245
10246
10247
10248
10249
10250
10251
10252
10253
10254
10255
10256
10257
10258
10259
10260
10261
10262
10263
10264
10265
10266
10267
10268
10269
10270
10271
10272
10273
10274
10275
10276
10277
10278
10279
10280
10281
10282
10283
10284
10285
10286
10287
10288
10289
10290
10291
10292
10293
10294
10295
10296
10297
10298
10299
10300
10301
10302
10303
10304
10305
10306
10307
10308
10309
10310
10311
10312
10313
10314
10315
10316
10317
10318
10319
10320
10321
10322
10323
10324
10325
10326
10327
10328
10329
10330
10331
10332
10333
10334
10335
10336
10337
10338
10339
10340
10341
10342
10343
10344
10345
10346
10347
10348
10349
10350
10351
10352
10353
10354
10355
10356
10357
10358
10359
10360
10361
10362
10363
10364
10365
10366
10367
10368
10369
10370
10371
10372
10373
10374
10375
10376
10377
10378
10379
10380
10381
10382
10383
10384
10385
10386
10387
10388
10389
10390
10391
10392
10393
10394
10395
10396
10397
10398
10399
10400
10401
10402
10403
10404
10405
10406
10407
10408
10409
10410
10411
10412
10413
10414
10415
10416
10417
10418
10419
10420
10421
10422
10423
10424
10425
10426
10427
10428
10429
10430
10431
10432
10433
10434
10435
10436
10437
10438
10439
10440
10441
10442
10443
10444
10445
10446
10447
10448
10449
10450
10451
10452
10453
10454
10455
10456
10457
10458
10459
10460
10461
10462
10463
10464
10465
10466
10467
10468
10469
10470
10471
10472
10473
10474
10475
10476
10477
10478
10479
10480
10481
10482
10483
10484
10485
10486
10487
10488
10489
10490
10491
10492
10493
10494
10495
10496
10497
10498
10499
10500
10501
10502
10503
10504
10505
10506
10507
10508
10509
10510
10511
10512
10513
10514
10515
10516
10517
10518
10519
10520
10521
10522
10523
10524
10525
10526
10527
10528
10529
10530
10531
10532
10533
10534
10535
10536
10537
10538
10539
10540
10541
10542
10543
10544
10545
10546
10547
10548
10549
10550
10551
10552
10553
10554
10555
10556
10557
10558
10559
10560
10561
10562
10563
10564
10565
10566
10567
10568
10569
10570
10571
10572
10573
10574
10575
10576
10577
10578
10579
10580
10581
10582
10583
10584
10585
10586
10587
10588
10589
10590
10591
10592
10593
10594
10595
10596
10597
10598
10599
10600
10601
10602
10603
10604
10605
10606
10607
10608
10609
10610
10611
10612
10613
10614
10615
10616
10617
10618
10619
10620
10621
10622
10623
10624
10625
10626
10627
10628
10629
10630
10631
10632
10633
10634
10635
10636
10637
10638
10639
10640
10641
10642
10643
10644
10645
10646
10647
10648
10649
10650
10651
10652
10653
10654
10655
10656
10657
10658
10659
10660
10661
10662
10663
10664
10665
10666
10667
10668
10669
10670
10671
10672
10673
10674
10675
10676
10677
10678
10679
10680
10681
10682
10683
10684
10685
10686
10687
10688
10689
10690
10691
10692
10693
10694
10695
10696
10697
10698
10699
10700
10701
10702
10703
10704
10705
10706
10707
10708
10709
10710
10711
10712
10713
10714
10715
10716
10717
10718
10719
10720
10721
10722
10723
10724
10725
10726
10727
10728
10729
10730
10731
10732
10733
10734
10735
10736
10737
10738
10739
10740
10741
10742
10743
10744
10745
10746
10747
10748
10749
10750
10751
10752
10753
10754
10755
10756
10757
10758
10759
10760
10761
10762
10763
10764
10765
10766
10767
10768
10769
10770
10771
10772
10773
10774
10775
10776
10777
10778
10779
10780
10781
10782
10783
10784
10785
10786
10787
10788
10789
10790
10791
10792
10793
10794
10795
10796
10797
10798
10799
10800
10801
10802
10803
10804
10805
10806
10807
10808
10809
10810
10811
10812
10813
10814
10815
10816
10817
10818
10819
10820
10821
10822
10823
10824
10825
10826
10827
10828
10829
10830
10831
10832
10833
10834
10835
10836
10837
10838
10839
10840
10841
10842
10843
10844
10845
10846
10847
10848
10849
10850
10851
10852
10853
10854
10855
10856
10857
10858
10859
10860
10861
10862
10863
10864
10865
10866
10867
10868
10869
10870
10871
10872
10873
10874
10875
10876
10877
10878
10879
10880
10881
10882
10883
10884
10885
10886
10887
10888
10889
10890
10891
10892
10893
10894
10895
10896
10897
10898
10899
10900
10901
10902
10903
10904
10905
10906
10907
10908
10909
10910
10911
10912
10913
10914
10915
10916
10917
10918
10919
10920
10921
10922
10923
10924
10925
10926
10927
10928
10929
10930
10931
10932
10933
10934
10935
10936
10937
10938
10939
10940
10941
10942
10943
10944
10945
10946
10947
10948
10949
10950
10951
10952
10953
10954
10955
10956
10957
10958
10959
10960
10961
10962
10963
10964
10965
10966
10967
10968
10969
10970
10971
10972
10973
10974
10975
10976
10977
10978
10979
10980
10981
10982
10983
10984
10985
10986
10987
10988
10989
10990
10991
10992
10993
10994
10995
10996
10997
10998
10999
11000
11001
11002
11003
11004
11005
11006
11007
11008
11009
11010
11011
11012
11013
11014
11015
11016
11017
11018
11019
11020
11021
11022
11023
11024
11025
11026
11027
11028
11029
11030
11031
11032
11033
11034
11035
11036
11037
11038
11039
11040
11041
11042
11043
11044
11045
11046
11047
11048
11049
11050
11051
11052
11053
11054
11055
11056
11057
11058
11059
11060
11061
11062
11063
11064
11065
11066
11067
11068
11069
11070
11071
11072
11073
11074
11075
11076
11077
11078
11079
11080
11081
11082
11083
11084
11085
11086
11087
11088
11089
11090
11091
11092
11093
11094
11095
11096
11097
11098
11099
11100
11101
11102
11103
11104
11105
11106
11107
11108
11109
11110
11111
11112
11113
11114
11115
11116
11117
11118
11119
11120
11121
11122
11123
11124
11125
11126
11127
11128
11129
11130
11131
11132
11133
11134
11135
11136
11137
11138
11139
11140
11141
11142
11143
11144
11145
11146
11147
11148
11149
11150
11151
11152
11153
11154
11155
11156
11157
11158
11159
11160
11161
11162
11163
11164
11165
11166
11167
11168
11169
11170
11171
11172
11173
11174
11175
11176
11177
11178
11179
11180
11181
11182
11183
11184
11185
11186
11187
11188
11189
11190
11191
11192
11193
11194
11195
11196
11197
11198
11199
11200
11201
11202
11203
11204
11205
11206
11207
11208
11209
11210
11211
11212
11213
11214
11215
11216
11217
11218
11219
11220
11221
11222
11223
11224
11225
11226
11227
11228
11229
11230
11231
11232
11233
11234
11235
11236
11237
11238
11239
11240
11241
11242
11243
11244
11245
11246
11247
11248
11249
11250
11251
11252
11253
11254
11255
11256
11257
11258
11259
11260
11261
11262
11263
11264
11265
11266
11267
11268
11269
11270
11271
11272
11273
11274
11275
11276
11277
11278
11279
11280
11281
11282
11283
11284
11285
11286
11287
11288
11289
11290
11291
11292
11293
11294
11295
11296
11297
11298
11299
11300
11301
11302
11303
11304
11305
11306
11307
11308
11309
11310
11311
11312
11313
11314
11315
11316
11317
11318
11319
11320
11321
11322
11323
11324
11325
11326
11327
11328
11329
11330
11331
11332
11333
11334
11335
11336
11337
11338
11339
11340
11341
11342
11343
11344
11345
11346
11347
11348
11349
11350
11351
11352
11353
11354
11355
11356
11357
11358
11359
11360
11361
11362
11363
11364
11365
11366
11367
11368
11369
11370
11371
11372
11373
11374
11375
11376
11377
11378
11379
11380
11381
11382
11383
11384
11385
11386
11387
11388
11389
11390
11391
11392
11393
11394
11395
11396
11397
11398
11399
11400
11401
11402
11403
11404
11405
11406
11407
11408
11409
11410
11411
11412
11413
11414
11415
11416
11417
11418
11419
11420
11421
11422
11423
11424
11425
11426
11427
11428
11429
11430
11431
11432
11433
11434
11435
11436
11437
11438
11439
11440
11441
11442
11443
11444
11445
11446
11447
11448
11449
11450
11451
11452
11453
11454
11455
11456
11457
11458
11459
11460
11461
11462
11463
11464
11465
11466
11467
11468
11469
11470
11471
11472
11473
11474
11475
11476
11477
11478
11479
11480
11481
11482
11483
11484
11485
11486
11487
11488
11489
11490
11491
11492
11493
11494
11495
11496
11497
11498
11499
11500
11501
11502
11503
11504
11505
11506
11507
11508
11509
11510
11511
11512
11513
11514
11515
11516
11517
11518
11519
11520
11521
11522
11523
11524
11525
11526
11527
11528
11529
11530
11531
11532
11533
11534
11535
11536
11537
11538
11539
11540
11541
11542
11543
11544
11545
11546
11547
11548
11549
11550
11551
11552
11553
11554
11555
11556
11557
11558
11559
11560
11561
11562
11563
11564
11565
11566
11567
11568
11569
11570
11571
11572
11573
11574
11575
11576
11577
11578
11579
11580
11581
11582
11583
11584
11585
11586
11587
11588
11589
11590
11591
11592
11593
11594
11595
11596
11597
11598
11599
11600
11601
11602
11603
11604
11605
11606
11607
11608
11609
11610
11611
11612
11613
11614
11615
11616
11617
11618
11619
11620
11621
11622
11623
11624
11625
11626
11627
11628
11629
11630
11631
11632
11633
11634
11635
11636
11637
11638
11639
11640
11641
11642
11643
11644
11645
11646
11647
11648
11649
11650
11651
11652
11653
11654
11655
11656
11657
11658
11659
11660
11661
11662
11663
11664
11665
11666
11667
11668
11669
11670
11671
11672
11673
11674
11675
11676
11677
11678
11679
11680
11681
11682
11683
11684
11685
11686
11687
11688
11689
11690
11691
11692
11693
11694
11695
11696
11697
11698
11699
11700
11701
11702
11703
11704
11705
11706
11707
11708
11709
11710
11711
11712
11713
11714
11715
11716
11717
11718
11719
11720
11721
11722
11723
11724
11725
11726
11727
11728
11729
11730
11731
11732
11733
11734
11735
11736
11737
11738
11739
11740
11741
11742
11743
11744
11745
11746
11747
11748
11749
11750
11751
11752
11753
11754
11755
11756
11757
11758
11759
11760
11761
11762
11763
11764
11765
11766
11767
11768
11769
11770
11771
11772
11773
11774
11775
11776
11777
11778
11779
11780
11781
11782
11783
11784
11785
11786
11787
11788
11789
11790
11791
11792
11793
11794
11795
11796
11797
11798
11799
11800
11801
11802
11803
11804
11805
11806
11807
11808
11809
11810
11811
11812
11813
11814
11815
11816
11817
11818
11819
11820
11821
11822
11823
11824
11825
11826
11827
11828
11829
11830
11831
11832
11833
11834
11835
11836
11837
11838
11839
11840
11841
11842
11843
11844
11845
11846
11847
11848
11849
11850
11851
11852
11853
11854
11855
11856
11857
11858
11859
11860
11861
11862
11863
11864
11865
11866
11867
11868
11869
11870
11871
11872
11873
11874
11875
11876
11877
11878
11879
11880
11881
11882
11883
11884
11885
11886
11887
11888
11889
11890
11891
11892
11893
11894
11895
11896
11897
11898
11899
11900
11901
11902
11903
11904
11905
11906
11907
11908
11909
11910
11911
11912
11913
11914
11915
11916
11917
11918
11919
11920
11921
11922
11923
11924
11925
11926
11927
11928
11929
11930
11931
11932
11933
11934
11935
11936
11937
11938
11939
11940
11941
11942
11943
11944
11945
11946
11947
11948
11949
11950
11951
11952
11953
11954
11955
11956
11957
11958
11959
11960
11961
11962
11963
11964
11965
11966
11967
11968
11969
11970
11971
11972
11973
11974
11975
11976
11977
11978
11979
11980
11981
11982
11983
11984
11985
11986
11987
11988
11989
11990
11991
11992
11993
11994
11995
11996
11997
11998
11999
12000
12001
12002
12003
12004
12005
12006
12007
12008
12009
12010
12011
12012
12013
12014
12015
12016
12017
12018
12019
12020
12021
12022
12023
12024
12025
12026
12027
12028
12029
12030
12031
12032
12033
12034
12035
12036
12037
12038
12039
12040
12041
12042
12043
12044
12045
12046
12047
12048
12049
12050
12051
12052
12053
12054
12055
12056
12057
12058
12059
12060
12061
12062
12063
12064
12065
12066
12067
12068
12069
12070
12071
12072
12073
12074
12075
12076
12077
12078
12079
12080
12081
12082
12083
12084
12085
12086
12087
12088
12089
12090
12091
12092
12093
12094
12095
12096
12097
12098
12099
12100
12101
12102
12103
12104
12105
12106
12107
12108
12109
12110
12111
12112
12113
12114
12115
12116
12117
12118
12119
12120
12121
12122
12123
12124
12125
12126
12127
12128
12129
12130
12131
12132
12133
12134
12135
12136
12137
12138
12139
12140
12141
12142
12143
12144
12145
12146
12147
12148
12149
12150
12151
12152
12153
12154
12155
12156
12157
12158
12159
12160
12161
12162
12163
12164
12165
12166
12167
12168
12169
12170
12171
12172
12173
12174
12175
12176
12177
12178
12179
12180
12181
12182
12183
12184
12185
12186
12187
12188
12189
12190
12191
12192
12193
12194
12195
12196
12197
12198
12199
12200
12201
12202
12203
12204
12205
12206
12207
12208
12209
12210
12211
12212
12213
12214
12215
12216
12217
12218
12219
12220
12221
12222
12223
12224
12225
12226
12227
12228
12229
12230
12231
12232
12233
12234
12235
12236
12237
12238
12239
12240
12241
12242
12243
12244
12245
12246
12247
12248
12249
12250
12251
12252
12253
12254
12255
12256
12257
12258
12259
12260
12261
12262
12263
12264
12265
12266
12267
12268
12269
12270
12271
12272
12273
12274
12275
12276
12277
12278
12279
12280
12281
12282
12283
12284
12285
12286
12287
12288
12289
12290
12291
12292
12293
12294
12295
12296
12297
12298
12299
12300
12301
12302
12303
12304
12305
12306
12307
12308
12309
12310
12311
12312
12313
12314
12315
12316
12317
12318
12319
12320
12321
12322
12323
12324
12325
12326
12327
12328
12329
12330
12331
12332
12333
12334
12335
12336
12337
12338
12339
12340
12341
12342
12343
12344
12345
12346
12347
12348
12349
12350
12351
12352
12353
12354
12355
12356
12357
12358
12359
12360
12361
12362
12363
12364
12365
12366
12367
12368
12369
12370
12371
12372
12373
12374
12375
12376
12377
12378
12379
12380
12381
12382
12383
12384
12385
12386
12387
12388
12389
12390
12391
12392
12393
12394
12395
12396
12397
12398
12399
12400
12401
12402
12403
12404
12405
12406
12407
12408
12409
12410
12411
12412
12413
12414
12415
12416
12417
12418
12419
12420
12421
12422
12423
12424
12425
12426
12427
12428
12429
12430
12431
12432
12433
12434
12435
12436
12437
12438
12439
12440
12441
12442
12443
12444
12445
12446
12447
12448
12449
12450
12451
12452
12453
12454
12455
12456
12457
12458
12459
12460
12461
12462
12463
12464
12465
12466
12467
12468
12469
12470
12471
12472
12473
12474
12475
12476
12477
12478
12479
12480
12481
12482
12483
12484
12485
12486
12487
12488
12489
12490
12491
12492
12493
12494
12495
12496
12497
12498
12499
12500
12501
12502
12503
12504
12505
12506
12507
12508
12509
12510
12511
12512
12513
12514
12515
12516
12517
12518
12519
12520
12521
12522
12523
12524
12525
12526
12527
12528
12529
12530
12531
12532
12533
12534
12535
12536
12537
12538
12539
12540
12541
12542
12543
12544
12545
12546
12547
12548
12549
12550
12551
12552
12553
12554
12555
12556
12557
12558
12559
12560
12561
12562
12563
12564
12565
12566
12567
12568
12569
12570
12571
12572
12573
12574
12575
12576
12577
12578
12579
12580
12581
12582
12583
12584
12585
12586
12587
12588
12589
12590
12591
12592
12593
12594
12595
12596
12597
12598
12599
12600
12601
12602
12603
12604
12605
12606
 
/* Keyboard and mouse input; editor command loop.

Copyright (C) 1985-1989, 1993-1997, 1999-2021 Free Software Foundation,
Inc.

This file is part of GNU Emacs.

GNU Emacs is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or (at
your option) any later version.

GNU Emacs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.  */

#include <config.h>

#include <sys/stat.h>

#include "lisp.h"
#include "coding.h"
#include "termchar.h"
#include "termopts.h"
#include "frame.h"
#include "termhooks.h"
#include "macros.h"
#include "keyboard.h"
#include "window.h"
#include "commands.h"
#include "character.h"
#include "buffer.h"
#include "dispextern.h"
#include "syntax.h"
#include "intervals.h"
#include "keymap.h"
#include "blockinput.h"
#include "sysstdio.h"
#include "systime.h"
#include "atimer.h"
#include "process.h"
#include "menu.h"
#include <errno.h>

#ifdef HAVE_PTHREAD
#include <pthread.h>
#endif
#ifdef MSDOS
#include "msdos.h"
#include <time.h>
#else /* not MSDOS */
#include <sys/ioctl.h>
#endif /* not MSDOS */

#if defined USABLE_FIONREAD && defined USG5_4
# include <sys/filio.h>
#endif

#include "syssignal.h"

#include <sys/types.h>
#include <unistd.h>
#include <fcntl.h>

#include <ignore-value.h>

#include "pdumper.h"

#ifdef HAVE_WINDOW_SYSTEM
#include TERM_HEADER
#endif /* HAVE_WINDOW_SYSTEM */

/* Work around GCC bug 54561.  */
#if GNUC_PREREQ (4, 3, 0)
# pragma GCC diagnostic ignored "-Wclobbered"
#endif

#ifdef WINDOWSNT
char const DEV_TTY[] = "CONOUT$";
#else
char const DEV_TTY[] = "/dev/tty";
#endif

/* Variables for blockinput.h:  */

/* Positive if interrupt input is blocked right now.  */
volatile int interrupt_input_blocked;

/* True means an input interrupt or alarm signal has arrived.
   The maybe_quit function checks this.  */
volatile bool pending_signals;

enum { KBD_BUFFER_SIZE = 4096 };

KBOARD *initial_kboard;
KBOARD *current_kboard;
static KBOARD *all_kboards;

/* True in the single-kboard state, false in the any-kboard state.  */
static bool single_kboard;

/* Minimum allowed size of the recent_keys vector.  */
#define MIN_NUM_RECENT_KEYS (100)

/* Index for storing next element into recent_keys.  */
static int recent_keys_index;

/* Total number of elements stored into recent_keys.  */
static int total_keys;

/* Size of the recent_keys vector.  */
static int lossage_limit = 3 * MIN_NUM_RECENT_KEYS;

/* This vector holds the last lossage_limit keystrokes.  */
static Lisp_Object recent_keys;

/* Vector holding the key sequence that invoked the current command.
   It is reused for each command, and it may be longer than the current
   sequence; this_command_key_count indicates how many elements
   actually mean something.
   It's easier to staticpro a single Lisp_Object than an array.  */
Lisp_Object this_command_keys;
ptrdiff_t this_command_key_count;

/* This vector is used as a buffer to record the events that were actually read
   by read_key_sequence.  */
static Lisp_Object raw_keybuf;
static int raw_keybuf_count;

#define GROW_RAW_KEYBUF							\
 if (raw_keybuf_count == ASIZE (raw_keybuf))				\
   raw_keybuf = larger_vector (raw_keybuf, 1, -1)

/* Number of elements of this_command_keys
   that precede this key sequence.  */
static ptrdiff_t this_single_command_key_start;

#ifdef HAVE_STACK_OVERFLOW_HANDLING

/* For longjmp to recover from C stack overflow.  */
sigjmp_buf return_to_command_loop;

/* Message displayed by Vtop_level when recovering from C stack overflow.  */
static Lisp_Object recover_top_level_message;

#endif /* HAVE_STACK_OVERFLOW_HANDLING */

/* Message normally displayed by Vtop_level.  */
static Lisp_Object regular_top_level_message;

/* True while displaying for echoing.   Delays C-g throwing.  */

static bool echoing;

/* Non-null means we can start echoing at the next input pause even
   though there is something in the echo area.  */

static struct kboard *ok_to_echo_at_next_pause;

/* The kboard last echoing, or null for none.  Reset to 0 in
   cancel_echoing.  If non-null, and a current echo area message
   exists, and echo_message_buffer is eq to the current message
   buffer, we know that the message comes from echo_kboard.  */

struct kboard *echo_kboard;

/* The buffer used for echoing.  Set in echo_now, reset in
   cancel_echoing.  */

Lisp_Object echo_message_buffer;

/* Character that causes a quit.  Normally C-g.

   If we are running on an ordinary terminal, this must be an ordinary
   ASCII char, since we want to make it our interrupt character.

   If we are not running on an ordinary terminal, it still needs to be
   an ordinary ASCII char.  This character needs to be recognized in
   the input interrupt handler.  At this point, the keystroke is
   represented as a struct input_event, while the desired quit
   character is specified as a lispy event.  The mapping from struct
   input_events to lispy events cannot run in an interrupt handler,
   and the reverse mapping is difficult for anything but ASCII
   keystrokes.

   FOR THESE ELABORATE AND UNSATISFYING REASONS, quit_char must be an
   ASCII character.  */
int quit_char;

/* Current depth in recursive edits.  */
EMACS_INT command_loop_level;

/* If not Qnil, this is a switch-frame event which we decided to put
   off until the end of a key sequence.  This should be read as the
   next command input, after any unread_command_events.

   read_key_sequence uses this to delay switch-frame events until the
   end of the key sequence; Fread_char uses it to put off switch-frame
   events until a non-ASCII event is acceptable as input.  */
Lisp_Object unread_switch_frame;

/* Last size recorded for a current buffer which is not a minibuffer.  */
static ptrdiff_t last_non_minibuf_size;

uintmax_t num_input_events;
ptrdiff_t point_before_last_command_or_undo;
struct buffer *buffer_before_last_command_or_undo;

/* Value of num_nonmacro_input_events as of last auto save.  */

static intmax_t last_auto_save;

/* The value of point when the last command was started. */
static ptrdiff_t last_point_position;

/* The frame in which the last input event occurred, or Qmacro if the
   last event came from a macro.  We use this to determine when to
   generate switch-frame events.  This may be cleared by functions
   like Fselect_frame, to make sure that a switch-frame event is
   generated by the next character.

   FIXME: This is modified by a signal handler so it should be volatile.
   It's exported to Lisp, though, so it can't simply be marked
   'volatile' here.  */
Lisp_Object internal_last_event_frame;

/* `read_key_sequence' stores here the command definition of the
   key sequence that it reads.  */
static Lisp_Object read_key_sequence_cmd;
static Lisp_Object read_key_sequence_remapped;

/* File in which we write all commands we read.  */
static FILE *dribble;

/* True if input is available.  */
bool input_pending;

/* True if more input was available last time we read an event.

   Since redisplay can take a significant amount of time and is not
   indispensable to perform the user's commands, when input arrives
   "too fast", Emacs skips redisplay.  More specifically, if the next
   command has already been input when we finish the previous command,
   we skip the intermediate redisplay.

   This is useful to try and make sure Emacs keeps up with fast input
   rates, such as auto-repeating keys.  But in some cases, this proves
   too conservative: we may end up disabling redisplay for the whole
   duration of a key repetition, even though we could afford to
   redisplay every once in a while.

   So we "sample" the input_pending flag before running a command and
   use *that* value after running the command to decide whether to
   skip redisplay or not.  This way, we only skip redisplay if we
   really can't keep up with the repeat rate.

   This only makes a difference if the next input arrives while running the
   command, which is very unlikely if the command is executed quickly.
   IOW this tends to avoid skipping redisplay after a long running command
   (which is a case where skipping redisplay is not very useful since the
   redisplay time is small compared to the time it took to run the command).

   A typical use case is when scrolling.  Scrolling time can be split into:
   - Time to do jit-lock on the newly displayed portion of buffer.
   - Time to run the actual scroll command.
   - Time to perform the redisplay.
   Jit-lock can happen either during the command or during the redisplay.
   In the most painful cases, the jit-lock time is the one that dominates.
   Also jit-lock can be tweaked (via jit-lock-defer) to delay its job, at the
   cost of temporary inaccuracy in display and scrolling.
   So without input_was_pending, what typically happens is the following:
   - when the command starts, there's no pending input (yet).
   - the scroll command triggers jit-lock.
   - during the long jit-lock time the next input arrives.
   - at the end of the command, we check input_pending and hence decide to
     skip redisplay.
   - we read the next input and start over.
   End result: all the hard work of jit-locking is "wasted" since redisplay
   doesn't actually happens (at least not before the input rate slows down).
   With input_was_pending redisplay is still skipped if Emacs can't keep up
   with the input rate, but if it can keep up just enough that there's no
   input_pending when we begin the command, then redisplay is not skipped
   which results in better feedback to the user.  */
bool input_was_pending;

/* Circular buffer for pre-read keyboard input.  */

static union buffered_input_event kbd_buffer[KBD_BUFFER_SIZE];

/* Pointer to next available character in kbd_buffer.
   If kbd_fetch_ptr == kbd_store_ptr, the buffer is empty.  */
static union buffered_input_event *kbd_fetch_ptr;

/* Pointer to next place to store character in kbd_buffer.  */
static union buffered_input_event *kbd_store_ptr;

/* The above pair of variables forms a "queue empty" flag.  When we
   enqueue a non-hook event, we increment kbd_store_ptr.  When we
   dequeue a non-hook event, we increment kbd_fetch_ptr.  We say that
   there is input available if the two pointers are not equal.

   Why not just have a flag set and cleared by the enqueuing and
   dequeuing functions?  The code is a bit simpler this way.  */

static void recursive_edit_unwind (Lisp_Object buffer);
static Lisp_Object command_loop (void);

static void echo_now (void);
static ptrdiff_t echo_length (void);

/* Incremented whenever a timer is run.  */
unsigned timers_run;

/* Address (if not 0) of struct timespec to zero out if a SIGIO interrupt
   happens.  */
struct timespec *input_available_clear_time;

/* True means use SIGIO interrupts; false means use CBREAK mode.
   Default is true if INTERRUPT_INPUT is defined.  */
bool interrupt_input;

/* Nonzero while interrupts are temporarily deferred during redisplay.  */
bool interrupts_deferred;

/* The time when Emacs started being idle.  */

static struct timespec timer_idleness_start_time;

/* After Emacs stops being idle, this saves the last value
   of timer_idleness_start_time from when it was idle.  */

static struct timespec timer_last_idleness_start_time;

\f
/* Global variable declarations.  */

/* Flags for readable_events.  */
#define READABLE_EVENTS_DO_TIMERS_NOW		(1 << 0)
#define READABLE_EVENTS_FILTER_EVENTS		(1 << 1)
#define READABLE_EVENTS_IGNORE_SQUEEZABLES	(1 << 2)

/* Function for init_keyboard to call with no args (if nonzero).  */
static void (*keyboard_init_hook) (void);

static bool get_input_pending (int);
static bool readable_events (int);
static Lisp_Object read_char_x_menu_prompt (Lisp_Object,
                                            Lisp_Object, bool *);
static Lisp_Object read_char_minibuf_menu_prompt (int, Lisp_Object);
static Lisp_Object make_lispy_event (struct input_event *);
static Lisp_Object make_lispy_movement (struct frame *, Lisp_Object,
                                        enum scroll_bar_part,
                                        Lisp_Object, Lisp_Object,
					Time);
static Lisp_Object modify_event_symbol (ptrdiff_t, int, Lisp_Object,
                                        Lisp_Object, const char *const *,
                                        Lisp_Object *, ptrdiff_t);
static Lisp_Object make_lispy_switch_frame (Lisp_Object);
static Lisp_Object make_lispy_focus_in (Lisp_Object);
static Lisp_Object make_lispy_focus_out (Lisp_Object);
static bool help_char_p (Lisp_Object);
static void save_getcjmp (sys_jmp_buf);
static void restore_getcjmp (void *);
static Lisp_Object apply_modifiers (int, Lisp_Object);
static void restore_kboard_configuration (int);
static void handle_interrupt (bool);
static AVOID quit_throw_to_read_char (bool);
static void timer_start_idle (void);
static void timer_stop_idle (void);
static void timer_resume_idle (void);
static void deliver_user_signal (int);
static char *find_user_signal_name (int);
static void store_user_signal_events (void);

/* Advance or retreat a buffered input event pointer.  */

static union buffered_input_event *
next_kbd_event (union buffered_input_event *ptr)
{
  return ptr == kbd_buffer + KBD_BUFFER_SIZE - 1 ? kbd_buffer : ptr + 1;
}

#ifdef HAVE_X11
static union buffered_input_event *
prev_kbd_event (union buffered_input_event *ptr)
{
  return ptr == kbd_buffer ? kbd_buffer + KBD_BUFFER_SIZE - 1 : ptr - 1;
}
#endif

/* Like EVENT_START, but assume EVENT is an event.
   This pacifies gcc -Wnull-dereference, which might otherwise
   complain about earlier checks that EVENT is indeed an event.  */
static Lisp_Object
xevent_start (Lisp_Object event)
{
  return XCAR (XCDR (event));
}

/* These setters are used only in this file, so they can be private.  */
static void
kset_echo_string (struct kboard *kb, Lisp_Object val)
{
  kb->echo_string_ = val;
}
static void
kset_echo_prompt (struct kboard *kb, Lisp_Object val)
{
  kb->echo_prompt_ = val;
}
static void
kset_kbd_queue (struct kboard *kb, Lisp_Object val)
{
  kb->kbd_queue_ = val;
}
static void
kset_keyboard_translate_table (struct kboard *kb, Lisp_Object val)
{
  kb->Vkeyboard_translate_table_ = val;
}
static void
kset_last_prefix_arg (struct kboard *kb, Lisp_Object val)
{
  kb->Vlast_prefix_arg_ = val;
}
static void
kset_last_repeatable_command (struct kboard *kb, Lisp_Object val)
{
  kb->Vlast_repeatable_command_ = val;
}
static void
kset_local_function_key_map (struct kboard *kb, Lisp_Object val)
{
  kb->Vlocal_function_key_map_ = val;
}
static void
kset_overriding_terminal_local_map (struct kboard *kb, Lisp_Object val)
{
  kb->Voverriding_terminal_local_map_ = val;
}
static void
kset_real_last_command (struct kboard *kb, Lisp_Object val)
{
  kb->Vreal_last_command_ = val;
}
static void
kset_system_key_syms (struct kboard *kb, Lisp_Object val)
{
  kb->system_key_syms_ = val;
}

\f
static bool
echo_keystrokes_p (void)
{
  return (FLOATP (Vecho_keystrokes) ? XFLOAT_DATA (Vecho_keystrokes) > 0.0
	  : FIXNUMP (Vecho_keystrokes) ? XFIXNUM (Vecho_keystrokes) > 0
          : false);
}

/* Add C to the echo string, without echoing it immediately.  C can be
   a character, which is pretty-printed, or a symbol, whose name is
   printed.  */

static void
echo_add_key (Lisp_Object c)
{
  char initbuf[KEY_DESCRIPTION_SIZE + 100];
  ptrdiff_t size = sizeof initbuf;
  char *buffer = initbuf;
  char *ptr = buffer;
  Lisp_Object echo_string = KVAR (current_kboard, echo_string);
  USE_SAFE_ALLOCA;

  if (STRINGP (echo_string) && SCHARS (echo_string) > 0)
    /* Add a space at the end as a separator between keys.  */
    ptr++[0] = ' ';

  /* If someone has passed us a composite event, use its head symbol.  */
  c = EVENT_HEAD (c);

  if (FIXNUMP (c))
    ptr = push_key_description (XFIXNUM (c), ptr);
  else if (SYMBOLP (c))
    {
      Lisp_Object name = SYMBOL_NAME (c);
      ptrdiff_t nbytes = SBYTES (name);

      if (size - (ptr - buffer) < nbytes)
	{
	  ptrdiff_t offset = ptr - buffer;
	  size = max (2 * size, size + nbytes);
	  buffer = SAFE_ALLOCA (size);
	  ptr = buffer + offset;
	}

      ptr += copy_text (SDATA (name), (unsigned char *) ptr, nbytes,
			STRING_MULTIBYTE (name), 1);
    }

  if ((NILP (echo_string) || SCHARS (echo_string) == 0)
      && help_char_p (c))
    {
      static const char text[] = " (Type ? for further options)";
      int len = sizeof text - 1;

      if (size - (ptr - buffer) < len)
	{
	  ptrdiff_t offset = ptr - buffer;
	  size += len;
	  buffer = SAFE_ALLOCA (size);
	  ptr = buffer + offset;
	}

      memcpy (ptr, text, len);
      ptr += len;
    }

  kset_echo_string
    (current_kboard,
     concat2 (echo_string, make_string (buffer, ptr - buffer)));
  SAFE_FREE ();
}

/* Temporarily add a dash to the end of the echo string if it's not
   empty, so that it serves as a mini-prompt for the very next
   character.  */

static void
echo_dash (void)
{
  /* Do nothing if not echoing at all.  */
  if (NILP (KVAR (current_kboard, echo_string)))
    return;

  if (!current_kboard->immediate_echo
      && SCHARS (KVAR (current_kboard, echo_string)) == 0)
    return;

  /* Do nothing if we just printed a prompt.  */
  if (STRINGP (KVAR (current_kboard, echo_prompt))
      && (SCHARS (KVAR (current_kboard, echo_prompt))
	  == SCHARS (KVAR (current_kboard, echo_string))))
    return;

  /* Do nothing if we have already put a dash at the end.  */
  if (SCHARS (KVAR (current_kboard, echo_string)) > 1)
    {
      Lisp_Object last_char, prev_char, idx;

      idx = make_fixnum (SCHARS (KVAR (current_kboard, echo_string)) - 2);
      prev_char = Faref (KVAR (current_kboard, echo_string), idx);

      idx = make_fixnum (SCHARS (KVAR (current_kboard, echo_string)) - 1);
      last_char = Faref (KVAR (current_kboard, echo_string), idx);

      if (XFIXNUM (last_char) == '-' && XFIXNUM (prev_char) != ' ')
	return;
    }

  /* Put a dash at the end of the buffer temporarily,
     but make it go away when the next character is added.  */
  AUTO_STRING (dash, "-");
  kset_echo_string (current_kboard,
		    concat2 (KVAR (current_kboard, echo_string), dash));
  echo_now ();
}

static void
echo_update (void)
{
  if (current_kboard->immediate_echo)
    {
      ptrdiff_t i;
      Lisp_Object prompt = KVAR (current_kboard, echo_prompt);
      Lisp_Object prefix = call0 (Qinternal_echo_keystrokes_prefix);
      kset_echo_string (current_kboard,
			NILP (prompt) ? prefix
			: NILP (prefix) ? prompt
			: concat2 (prompt, prefix));

      for (i = 0; i < this_command_key_count; i++)
	{
	  Lisp_Object c;

	  c = AREF (this_command_keys, i);
	  if (! (EVENT_HAS_PARAMETERS (c)
		 && EQ (EVENT_HEAD_KIND (EVENT_HEAD (c)), Qmouse_movement)))
	    echo_add_key (c);
	}

      echo_now ();
    }
}

/* Display the current echo string, and begin echoing if not already
   doing so.  */

static void
echo_now (void)
{
  if (!current_kboard->immediate_echo
      /* This test breaks calls that use `echo_now' to display the echo_prompt.
         && echo_keystrokes_p () */)
    {
      current_kboard->immediate_echo = true;
      echo_update ();
      /* Put a dash at the end to invite the user to type more.  */
      echo_dash ();
    }

  echoing = true;
  /* FIXME: Use call (Qmessage) so it can be advised (e.g. emacspeak).  */
  message3_nolog (KVAR (current_kboard, echo_string));
  echoing = false;

  /* Record in what buffer we echoed, and from which kboard.  */
  echo_message_buffer = echo_area_buffer[0];
  echo_kboard = current_kboard;

  if (waiting_for_input && !NILP (Vquit_flag))
    quit_throw_to_read_char (0);
}

/* Turn off echoing, for the start of a new command.  */

void
cancel_echoing (void)
{
  current_kboard->immediate_echo = false;
  kset_echo_prompt (current_kboard, Qnil);
  kset_echo_string (current_kboard, Qnil);
  ok_to_echo_at_next_pause = NULL;
  echo_kboard = NULL;
  echo_message_buffer = Qnil;
}

/* Return the length of the current echo string.  */

static ptrdiff_t
echo_length (void)
{
  return (STRINGP (KVAR (current_kboard, echo_string))
	  ? SCHARS (KVAR (current_kboard, echo_string))
	  : 0);
}

/* Truncate the current echo message to its first LEN chars.
   This and echo_char get used by read_key_sequence when the user
   switches frames while entering a key sequence.  */

static void
echo_truncate (ptrdiff_t nchars)
{
  Lisp_Object es = KVAR (current_kboard, echo_string);
  if (STRINGP (es) && SCHARS (es) > nchars)
    kset_echo_string (current_kboard,
		      Fsubstring (KVAR (current_kboard, echo_string),
				  make_fixnum (0), make_fixnum (nchars)));
  truncate_echo_area (nchars);
}

\f
/* Functions for manipulating this_command_keys.  */
static void
add_command_key (Lisp_Object key)
{
  if (this_command_key_count >= ASIZE (this_command_keys))
    this_command_keys = larger_vector (this_command_keys, 1, -1);

  ASET (this_command_keys, this_command_key_count, key);
  ++this_command_key_count;
}

\f
Lisp_Object
recursive_edit_1 (void)
{
  ptrdiff_t count = SPECPDL_INDEX ();
  Lisp_Object val;

  if (command_loop_level > 0)
    {
      specbind (Qstandard_output, Qt);
      specbind (Qstandard_input, Qt);
    }

#ifdef HAVE_WINDOW_SYSTEM
  /* The command loop has started an hourglass timer, so we have to
     cancel it here, otherwise it will fire because the recursive edit
     can take some time.  Do not check for display_hourglass_p here,
     because it could already be nil.  */
    cancel_hourglass ();
#endif

  /* This function may have been called from a debugger called from
     within redisplay, for instance by Edebugging a function called
     from fontification-functions.  We want to allow redisplay in
     the debugging session.

     The recursive edit is left with a `(throw exit ...)'.  The `exit'
     tag is not caught anywhere in redisplay, i.e. when we leave the
     recursive edit, the original redisplay leading to the recursive
     edit will be unwound.  The outcome should therefore be safe.  */
  specbind (Qinhibit_redisplay, Qnil);
  redisplaying_p = 0;

  /* This variable stores buffers that have changed so that an undo
     boundary can be added. specbind this so that changes in the
     recursive edit will not result in undo boundaries in buffers
     changed before we entered there recursive edit.
     See Bug #23632.
  */
  specbind (Qundo_auto__undoably_changed_buffers, Qnil);

  val = command_loop ();
  if (EQ (val, Qt))
    quit ();
  /* Handle throw from read_minibuf when using minibuffer
     while it's active but we're in another window.  */
  if (STRINGP (val))
    xsignal1 (Qerror, val);

  if (FUNCTIONP (val))
    call0 (val);

  return unbind_to (count, Qnil);
}

/* When an auto-save happens, record the "time", and don't do again soon.  */

void
record_auto_save (void)
{
  last_auto_save = num_nonmacro_input_events;
}

/* Make an auto save happen as soon as possible at command level.  */

#ifdef SIGDANGER
void
force_auto_save_soon (void)
{
  last_auto_save = - auto_save_interval - 1;
}
#endif
\f
DEFUN ("recursive-edit", Frecursive_edit, Srecursive_edit, 0, 0, "",
       doc: /* Invoke the editor command loop recursively.
To get out of the recursive edit, a command can throw to `exit' -- for
instance (throw \\='exit nil).
If you throw a value other than t, `recursive-edit' returns normally
to the function that called it.  Throwing a t value causes
`recursive-edit' to quit, so that control returns to the command loop
one level up.

This function is called by the editor initialization to begin editing.  */)
  (void)
{
  ptrdiff_t count = SPECPDL_INDEX ();
  Lisp_Object buffer;

  /* If we enter while input is blocked, don't lock up here.
     This may happen through the debugger during redisplay.  */
  if (input_blocked_p ())
    return Qnil;

  if (command_loop_level >= 0
      && current_buffer != XBUFFER (XWINDOW (selected_window)->contents))
    buffer = Fcurrent_buffer ();
  else
    buffer = Qnil;

  /* Don't do anything interesting between the increment and the
     record_unwind_protect!  Otherwise, we could get distracted and
     never decrement the counter again.  */
  command_loop_level++;
  update_mode_lines = 17;
  record_unwind_protect (recursive_edit_unwind, buffer);

  /* If we leave recursive_edit_1 below with a `throw' for instance,
     like it is done in the splash screen display, we have to
     make sure that we restore single_kboard as command_loop_1
     would have done if it were left normally.  */
  if (command_loop_level > 0)
    temporarily_switch_to_single_kboard (SELECTED_FRAME ());

  recursive_edit_1 ();
  return unbind_to (count, Qnil);
}

void
recursive_edit_unwind (Lisp_Object buffer)
{
  if (BUFFERP (buffer))
    Fset_buffer (buffer);

  command_loop_level--;
  update_mode_lines = 18;
}

\f

/* If we're in single_kboard state for kboard KBOARD,
   get out of it.  */

void
not_single_kboard_state (KBOARD *kboard)
{
  if (kboard == current_kboard)
    single_kboard = false;
}

/* Maintain a stack of kboards, so other parts of Emacs
   can switch temporarily to the kboard of a given frame
   and then revert to the previous status.  */

struct kboard_stack
{
  KBOARD *kboard;
  struct kboard_stack *next;
};

static struct kboard_stack *kboard_stack;

void
push_kboard (struct kboard *k)
{
  struct kboard_stack *p = xmalloc (sizeof *p);

  p->next = kboard_stack;
  p->kboard = current_kboard;
  kboard_stack = p;

  current_kboard = k;
}

void
pop_kboard (void)
{
  struct terminal *t;
  struct kboard_stack *p = kboard_stack;
  bool found = false;
  for (t = terminal_list; t; t = t->next_terminal)
    {
      if (t->kboard == p->kboard)
        {
          current_kboard = p->kboard;
          found = true;
          break;
        }
    }
  if (!found)
    {
      /* The terminal we remembered has been deleted.  */
      current_kboard = FRAME_KBOARD (SELECTED_FRAME ());
      single_kboard = false;
    }
  kboard_stack = p->next;
  xfree (p);
}

/* Switch to single_kboard mode, making current_kboard the only KBOARD
  from which further input is accepted.  If F is non-nil, set its
  KBOARD as the current keyboard.

  This function uses record_unwind_protect_int to return to the previous
  state later.

  If Emacs is already in single_kboard mode, and F's keyboard is
  locked, then this function will throw an error.  */

void
temporarily_switch_to_single_kboard (struct frame *f)
{
  bool was_locked = single_kboard;
  if (was_locked)
    {
      if (f != NULL && FRAME_KBOARD (f) != current_kboard)
        /* We can not switch keyboards while in single_kboard mode.
           In rare cases, Lisp code may call `recursive-edit' (or
           `read-minibuffer' or `y-or-n-p') after it switched to a
           locked frame.  For example, this is likely to happen
           when server.el connects to a new terminal while Emacs is in
           single_kboard mode.  It is best to throw an error instead
           of presenting the user with a frozen screen.  */
        error ("Terminal %d is locked, cannot read from it",
               FRAME_TERMINAL (f)->id);
      else
        /* This call is unnecessary, but helps
           `restore_kboard_configuration' discover if somebody changed
           `current_kboard' behind our back.  */
        push_kboard (current_kboard);
    }
  else if (f != NULL)
    current_kboard = FRAME_KBOARD (f);
  single_kboard = true;
  record_unwind_protect_int (restore_kboard_configuration, was_locked);
}

static void
restore_kboard_configuration (int was_locked)
{
  single_kboard = was_locked;
  if (was_locked)
    {
      struct kboard *prev = current_kboard;
      pop_kboard ();
      /* The pop should not change the kboard.  */
      if (single_kboard && current_kboard != prev)
        emacs_abort ();
    }
}

\f
/* Handle errors that are not handled at inner levels
   by printing an error message and returning to the editor command loop.  */

static Lisp_Object
cmd_error (Lisp_Object data)
{
  Lisp_Object old_level, old_length;
  ptrdiff_t count = SPECPDL_INDEX ();
  Lisp_Object conditions;
  char macroerror[sizeof "After..kbd macro iterations: "
		  + INT_STRLEN_BOUND (EMACS_INT)];

#ifdef HAVE_WINDOW_SYSTEM
  if (display_hourglass_p)
    cancel_hourglass ();
#endif

  if (!NILP (executing_kbd_macro))
    {
      if (executing_kbd_macro_iterations == 1)
	sprintf (macroerror, "After 1 kbd macro iteration: ");
      else
	sprintf (macroerror, "After %"pI"d kbd macro iterations: ",
		 executing_kbd_macro_iterations);
    }
  else
    *macroerror = 0;

  conditions = Fget (XCAR (data), Qerror_conditions);
  if (NILP (Fmemq (Qminibuffer_quit, conditions)))
    {
      Vexecuting_kbd_macro = Qnil;
      executing_kbd_macro = Qnil;
    }

  specbind (Qstandard_output, Qt);
  specbind (Qstandard_input, Qt);
  kset_prefix_arg (current_kboard, Qnil);
  kset_last_prefix_arg (current_kboard, Qnil);
  cancel_echoing ();

  /* Avoid unquittable loop if data contains a circular list.  */
  old_level = Vprint_level;
  old_length = Vprint_length;
  XSETFASTINT (Vprint_level, 10);
  XSETFASTINT (Vprint_length, 10);
  cmd_error_internal (data, macroerror);
  Vprint_level = old_level;
  Vprint_length = old_length;

  Vquit_flag = Qnil;
  Vinhibit_quit = Qnil;

  unbind_to (count, Qnil);
  return make_fixnum (0);
}

/* Take actions on handling an error.  DATA is the data that describes
   the error.

   CONTEXT is a C-string containing ASCII characters only which
   describes the context in which the error happened.  If we need to
   generalize CONTEXT to allow multibyte characters, make it a Lisp
   string.  */

void
cmd_error_internal (Lisp_Object data, const char *context)
{
  /* The immediate context is not interesting for Quits,
     since they are asynchronous.  */
  if (signal_quit_p (XCAR (data)))
    Vsignaling_function = Qnil;

  Vquit_flag = Qnil;
  Vinhibit_quit = Qt;

  /* Use user's specified output function if any.  */
  if (!NILP (Vcommand_error_function))
    call3 (Vcommand_error_function, data,
	   context ? build_string (context) : empty_unibyte_string,
	   Vsignaling_function);

  Vsignaling_function = Qnil;
}

DEFUN ("command-error-default-function", Fcommand_error_default_function,
       Scommand_error_default_function, 3, 3, 0,
       doc: /* Produce default output for unhandled error message.
Default value of `command-error-function'.  */)
  (Lisp_Object data, Lisp_Object context, Lisp_Object signal)
{
  struct frame *sf = SELECTED_FRAME ();
  Lisp_Object conditions;

  CHECK_STRING (context);

  /* If the window system or terminal frame hasn't been initialized
     yet, or we're not interactive, write the message to stderr and exit.  */
  if (!sf->glyphs_initialized_p
	   /* The initial frame is a special non-displaying frame. It
	      will be current in daemon mode when there are no frames
	      to display, and in non-daemon mode before the real frame
	      has finished initializing.  If an error is thrown in the
	      latter case while creating the frame, then the frame
	      will never be displayed, so the safest thing to do is
	      write to stderr and quit.  In daemon mode, there are
	      many other potential errors that do not prevent frames
	      from being created, so continuing as normal is better in
	      that case.  */
	   || (!IS_DAEMON && FRAME_INITIAL_P (sf))
	   || noninteractive)
    {
      print_error_message (data, Qexternal_debugging_output,
			   SSDATA (context), signal);
      Fterpri (Qexternal_debugging_output, Qnil);
      Fkill_emacs (make_fixnum (-1));
    }
  else
    {
      conditions = Fget (XCAR (data), Qerror_conditions);

      clear_message (1, 0);
      message_log_maybe_newline ();

      if (!NILP (Fmemq (Qminibuffer_quit, conditions)))
	{
	  Fding (Qt);
	}
      else
	{
	  Fdiscard_input ();
	  bitch_at_user ();
	}

      print_error_message (data, Qt, SSDATA (context), signal);
    }
  return Qnil;
}

static Lisp_Object command_loop_1 (void);
static Lisp_Object top_level_1 (Lisp_Object);

/* Entry to editor-command-loop.
   This level has the catches for exiting/returning to editor command loop.
   It returns nil to exit recursive edit, t to abort it.  */

Lisp_Object
command_loop (void)
{
#ifdef HAVE_STACK_OVERFLOW_HANDLING
  /* At least on GNU/Linux, saving signal mask is important here.  */
  if (sigsetjmp (return_to_command_loop, 1) != 0)
    {
      /* Comes here from handle_sigsegv (see sysdep.c) and
	 stack_overflow_handler (see w32fns.c).  */
#ifdef WINDOWSNT
      w32_reset_stack_overflow_guard ();
#endif
      init_eval ();
      Vinternal__top_level_message = recover_top_level_message;
    }
  else
    Vinternal__top_level_message = regular_top_level_message;
#endif /* HAVE_STACK_OVERFLOW_HANDLING */
  if (command_loop_level > 0 || minibuf_level > 0)
    {
      Lisp_Object val;
      val = internal_catch (Qexit, command_loop_2, Qerror);
      executing_kbd_macro = Qnil;
      return val;
    }
  else
    while (1)
      {
	internal_catch (Qtop_level, top_level_1, Qnil);
	internal_catch (Qtop_level, command_loop_2, Qerror);
	executing_kbd_macro = Qnil;

	/* End of file in -batch run causes exit here.  */
	if (noninteractive)
	  Fkill_emacs (Qt);
      }
}

/* Here we catch errors in execution of commands within the
   editing loop, and reenter the editing loop.
   When there is an error, cmd_error runs and returns a non-nil
   value to us.  A value of nil means that command_loop_1 itself
   returned due to end of file (or end of kbd macro).  HANDLERS is a
   list of condition names, passed to internal_condition_case.  */

Lisp_Object
command_loop_2 (Lisp_Object handlers)
{
  register Lisp_Object val;

  do
    val = internal_condition_case (command_loop_1, handlers, cmd_error);
  while (!NILP (val));

  return Qnil;
}

static Lisp_Object
top_level_2 (void)
{
  return Feval (Vtop_level, Qnil);
}

static Lisp_Object
top_level_1 (Lisp_Object ignore)
{
  /* On entry to the outer level, run the startup file.  */
  if (!NILP (Vtop_level))
    internal_condition_case (top_level_2, Qerror, cmd_error);
  else if (!NILP (Vpurify_flag))
    message1 ("Bare impure Emacs (standard Lisp code not loaded)");
  else
    message1 ("Bare Emacs (standard Lisp code not loaded)");
  return Qnil;
}

DEFUN ("top-level", Ftop_level, Stop_level, 0, 0, "",
       doc: /* Exit all recursive editing levels.
This also exits all active minibuffers.  */
       attributes: noreturn)
  (void)
{
#ifdef HAVE_WINDOW_SYSTEM
  if (display_hourglass_p)
    cancel_hourglass ();
#endif

  /* Unblock input if we enter with input blocked.  This may happen if
     redisplay traps e.g. during tool-bar update with input blocked.  */
  totally_unblock_input ();

  Fthrow (Qtop_level, Qnil);
}

static AVOID
user_error (const char *msg)
{
  xsignal1 (Quser_error, build_string (msg));
}

DEFUN ("exit-recursive-edit", Fexit_recursive_edit, Sexit_recursive_edit, 0, 0, "",
       doc: /* Exit from the innermost recursive edit or minibuffer.  */
       attributes: noreturn)
  (void)
{
  if (command_loop_level > 0 || minibuf_level > 0)
    Fthrow (Qexit, Qnil);

  user_error ("No recursive edit is in progress");
}

DEFUN ("abort-recursive-edit", Fabort_recursive_edit, Sabort_recursive_edit, 0, 0, "",
       doc: /* Abort the command that requested this recursive edit or minibuffer input.  */
       attributes: noreturn)
  (void)
{
  if (command_loop_level > 0 || minibuf_level > 0)
    Fthrow (Qexit, Qt);

  user_error ("No recursive edit is in progress");
}
\f
/* Restore mouse tracking enablement.  See Finternal_track_mouse for
   the only use of this function.  */

static void
tracking_off (Lisp_Object old_track_mouse)
{
  track_mouse = old_track_mouse;
  if (NILP (old_track_mouse))
    {
      /* Redisplay may have been preempted because there was input
	 available, and it assumes it will be called again after the
	 input has been processed.  If the only input available was
	 the sort that we have just disabled, then we need to call
	 redisplay.  */
      if (!readable_events (READABLE_EVENTS_DO_TIMERS_NOW))
	{
	  redisplay_preserve_echo_area (6);
	  get_input_pending (READABLE_EVENTS_DO_TIMERS_NOW);
	}
    }
}

DEFUN ("internal--track-mouse", Finternal_track_mouse, Sinternal_track_mouse,
       1, 1, 0,
       doc: /* Call BODYFUN with mouse movement events enabled.  */)
  (Lisp_Object bodyfun)
{
  ptrdiff_t count = SPECPDL_INDEX ();
  Lisp_Object val;

  record_unwind_protect (tracking_off, track_mouse);

  track_mouse = Qt;

  val = call0 (bodyfun);
  return unbind_to (count, val);
}

/* If mouse has moved on some frame and we are tracking the mouse,
   return one of those frames.  Return NULL otherwise.

   If ignore_mouse_drag_p is non-zero, ignore (implicit) mouse movement
   after resizing the tool-bar window.  */

bool ignore_mouse_drag_p;

static struct frame *
some_mouse_moved (void)
{
  Lisp_Object tail, frame;

  if (NILP (track_mouse) || ignore_mouse_drag_p)
    return NULL;

  FOR_EACH_FRAME (tail, frame)
    {
      if (XFRAME (frame)->mouse_moved)
	return XFRAME (frame);
    }

  return NULL;
}

\f
/* This is the actual command reading loop,
   sans error-handling encapsulation.  */

enum { READ_KEY_ELTS = 30 };
static int read_key_sequence (Lisp_Object *, Lisp_Object,
                              bool, bool, bool, bool);
static void adjust_point_for_property (ptrdiff_t, bool);

static Lisp_Object
command_loop_1 (void)
{
  modiff_count prev_modiff = 0;
  struct buffer *prev_buffer = NULL;
  bool already_adjusted = 0;

  kset_prefix_arg (current_kboard, Qnil);
  kset_last_prefix_arg (current_kboard, Qnil);
  Vdeactivate_mark = Qnil;
  waiting_for_input = false;
  cancel_echoing ();

  this_command_key_count = 0;
  this_single_command_key_start = 0;

  if (NILP (Vmemory_full))
    {
      /* Make sure this hook runs after commands that get errors and
	 throw to top level.  */
      /* Note that the value cell will never directly contain nil
	 if the symbol is a local variable.  */
      if (!NILP (Vpost_command_hook) && !NILP (Vrun_hooks))
	safe_run_hooks (Qpost_command_hook);

      /* If displaying a message, resize the echo area window to fit
	 that message's size exactly.  */
      if (!NILP (echo_area_buffer[0]))
	resize_echo_area_exactly ();

      /* If there are warnings waiting, process them.  */
      if (!NILP (Vdelayed_warnings_list))
        safe_run_hooks (Qdelayed_warnings_hook);

      if (!NILP (Vdeferred_action_list))
	safe_run_hooks (Qdeferred_action_function);
    }

  /* Do this after running Vpost_command_hook, for consistency.  */
  kset_last_command (current_kboard, Vthis_command);
  kset_real_last_command (current_kboard, Vreal_this_command);
  if (!CONSP (last_command_event))
    kset_last_repeatable_command (current_kboard, Vreal_this_command);

  while (true)
    {
      Lisp_Object cmd;

      if (! FRAME_LIVE_P (XFRAME (selected_frame)))
	Fkill_emacs (Qnil);

      /* Make sure the current window's buffer is selected.  */
      set_buffer_internal (XBUFFER (XWINDOW (selected_window)->contents));

      /* Display any malloc warning that just came out.  Use while because
	 displaying one warning can cause another.  */

      while (pending_malloc_warning)
	display_malloc_warning ();

      Vdeactivate_mark = Qnil;

      /* Don't ignore mouse movements for more than a single command
	 loop.  (This flag is set in xdisp.c whenever the tool bar is
	 resized, because the resize moves text up or down, and would
	 generate false mouse drag events if we don't ignore them.)  */
      ignore_mouse_drag_p = false;

      /* If minibuffer on and echo area in use,
	 wait a short time and redraw minibuffer.  */

      if (minibuf_level
	  && !NILP (echo_area_buffer[0])
	  && EQ (minibuf_window, echo_area_window)
	  && NUMBERP (Vminibuffer_message_timeout))
	{
	  /* Bind inhibit-quit to t so that C-g gets read in
	     rather than quitting back to the minibuffer.  */
	  ptrdiff_t count = SPECPDL_INDEX ();
	  specbind (Qinhibit_quit, Qt);

	  sit_for (Vminibuffer_message_timeout, 0, 2);

	  /* Clear the echo area.  */
	  message1 (0);
	  safe_run_hooks (Qecho_area_clear_hook);

	  /* We cleared the echo area, and the minibuffer will now
	     show, so resize the mini-window in case the minibuffer
	     needs more or less space than the echo area.  */
	  resize_mini_window (XWINDOW (minibuf_window), false);

	  unbind_to (count, Qnil);

	  /* If a C-g came in before, treat it as input now.  */
	  if (!NILP (Vquit_flag))
	    {
	      Vquit_flag = Qnil;
	      Vunread_command_events = list1i (quit_char);
	    }
	}

      /* If it has changed current-menubar from previous value,
	 really recompute the menubar from the value.  */
      if (! NILP (Vlucid_menu_bar_dirty_flag)
	  && !NILP (Ffboundp (Qrecompute_lucid_menubar)))
	call0 (Qrecompute_lucid_menubar);

      Vthis_command = Qnil;
      Vreal_this_command = Qnil;
      Vthis_original_command = Qnil;
      Vthis_command_keys_shift_translated = Qnil;

      /* Read next key sequence; i gets its length.  */
      raw_keybuf_count = 0;
      Lisp_Object keybuf[READ_KEY_ELTS];
      int i = read_key_sequence (keybuf, Qnil, false, true, true, false);

      /* A filter may have run while we were reading the input.  */
      if (! FRAME_LIVE_P (XFRAME (selected_frame)))
	Fkill_emacs (Qnil);
      set_buffer_internal (XBUFFER (XWINDOW (selected_window)->contents));

      ++num_input_keys;

      /* Now we have read a key sequence of length I,
	 or else I is 0 and we found end of file.  */

      if (i == 0)		/* End of file -- happens only in */
	return Qnil;		/* a kbd macro, at the end.  */
      /* -1 means read_key_sequence got a menu that was rejected.
	 Just loop around and read another command.  */
      if (i == -1)
	{
	  cancel_echoing ();
	  this_command_key_count = 0;
	  this_single_command_key_start = 0;
	  goto finalize;
	}

      last_command_event = keybuf[i - 1];

      /* If the previous command tried to force a specific window-start,
	 forget about that, in case this command moves point far away
	 from that position.  But also throw away beg_unchanged and
	 end_unchanged information in that case, so that redisplay will
	 update the whole window properly.  */
      if (XWINDOW (selected_window)->force_start)
	{
	  struct buffer *b;
	  XWINDOW (selected_window)->force_start = 0;
	  b = XBUFFER (XWINDOW (selected_window)->contents);
	  BUF_BEG_UNCHANGED (b) = BUF_END_UNCHANGED (b) = 0;
	}

      cmd = read_key_sequence_cmd;
      if (!NILP (Vexecuting_kbd_macro))
	{
	  if (!NILP (Vquit_flag))
	    {
	      Vexecuting_kbd_macro = Qt;
	      maybe_quit ();	/* Make some noise.  */
				/* Will return since macro now empty.  */
	    }
	}

      /* Do redisplay processing after this command except in special
	 cases identified below.  */
      prev_buffer = current_buffer;
      prev_modiff = MODIFF;
      last_point_position = PT;

      /* By default, we adjust point to a boundary of a region that
         has such a property that should be treated intangible
         (e.g. composition, display).  But, some commands will set
         this variable differently.  */
      Vdisable_point_adjustment = Qnil;

      /* Process filters and timers may have messed with deactivate-mark.
	 reset it before we execute the command.  */
      Vdeactivate_mark = Qnil;

      /* Remap command through active keymaps.  */
      Vthis_original_command = cmd;
      if (!NILP (read_key_sequence_remapped))
	cmd = read_key_sequence_remapped;

      /* Execute the command.  */

      {
	total_keys += total_keys < lossage_limit;
	ASET (recent_keys, recent_keys_index,
	      Fcons (Qnil, cmd));
	if (++recent_keys_index >= lossage_limit)
	  recent_keys_index = 0;
      }
      Vthis_command = cmd;
      Vreal_this_command = cmd;
      safe_run_hooks (Qpre_command_hook);

      already_adjusted = 0;

      if (NILP (Vthis_command))
	/* nil means key is undefined.  */
	call0 (Qundefined);
      else
	{
	  /* Here for a command that isn't executed directly.  */

#ifdef HAVE_WINDOW_SYSTEM
            ptrdiff_t scount = SPECPDL_INDEX ();

            if (display_hourglass_p
                && NILP (Vexecuting_kbd_macro))
              {
                record_unwind_protect_void (cancel_hourglass);
                start_hourglass ();
              }
#endif

            /* Ensure that we have added appropriate undo-boundaries as a
               result of changes from the last command. */
            call0 (Qundo_auto__add_boundary);

            /* Record point and buffer, so we can put point into the undo
               information if necessary. */
            point_before_last_command_or_undo = PT;
            buffer_before_last_command_or_undo = current_buffer;

            call1 (Qcommand_execute, Vthis_command);

#ifdef HAVE_WINDOW_SYSTEM
	  /* Do not check display_hourglass_p here, because
	     `command-execute' could change it, but we should cancel
	     hourglass cursor anyway.
	     But don't cancel the hourglass within a macro
	     just because a command in the macro finishes.  */
	  if (NILP (Vexecuting_kbd_macro))
            unbind_to (scount, Qnil);
#endif
          }
      kset_last_prefix_arg (current_kboard, Vcurrent_prefix_arg);

      safe_run_hooks (Qpost_command_hook);

      /* If displaying a message, resize the echo area window to fit
	 that message's size exactly.  Do this only if the echo area
	 window is the minibuffer window of the selected frame.  See
	 Bug#34317.  */
      if (!NILP (echo_area_buffer[0])
	  && (EQ (echo_area_window,
		  FRAME_MINIBUF_WINDOW (XFRAME (selected_frame)))))
	resize_echo_area_exactly ();

      /* If there are warnings waiting, process them.  */
      if (!NILP (Vdelayed_warnings_list))
        safe_run_hooks (Qdelayed_warnings_hook);

      safe_run_hooks (Qdeferred_action_function);

      kset_last_command (current_kboard, Vthis_command);
      kset_real_last_command (current_kboard, Vreal_this_command);
      if (!CONSP (last_command_event))
	kset_last_repeatable_command (current_kboard, Vreal_this_command);

      this_command_key_count = 0;
      this_single_command_key_start = 0;

      if (current_kboard->immediate_echo
	  && !NILP (call0 (Qinternal_echo_keystrokes_prefix)))
	{
	  current_kboard->immediate_echo = false;
	  /* Refresh the echo message.  */
	  echo_now ();
	}
      else
	cancel_echoing ();

      if (!NILP (BVAR (current_buffer, mark_active))
	  && !NILP (Vrun_hooks))
	{
	  /* In Emacs 22, setting transient-mark-mode to `only' was a
	     way of turning it on for just one command.  This usage is
	     obsolete, but support it anyway.  */
	  if (EQ (Vtransient_mark_mode, Qidentity))
	    Vtransient_mark_mode = Qnil;
	  else if (EQ (Vtransient_mark_mode, Qonly))
	    Vtransient_mark_mode = Qidentity;

	  if (!NILP (Vdeactivate_mark))
	    /* If `select-active-regions' is non-nil, this call to
	       `deactivate-mark' also sets the PRIMARY selection.  */
	    call0 (Qdeactivate_mark);
	  else
	    {
	      /* Even if not deactivating the mark, set PRIMARY if
		 `select-active-regions' is non-nil.  */
	      if (!NILP (Fwindow_system (Qnil))
		  /* Even if mark_active is non-nil, the actual buffer
		     marker may not have been set yet (Bug#7044).  */
		  && XMARKER (BVAR (current_buffer, mark))->buffer
		  && (EQ (Vselect_active_regions, Qonly)
		      ? EQ (CAR_SAFE (Vtransient_mark_mode), Qonly)
		      : (!NILP (Vselect_active_regions)
			 && !NILP (Vtransient_mark_mode)))
		  && NILP (Fmemq (Vthis_command,
				  Vselection_inhibit_update_commands)))
		{
		  Lisp_Object txt
		    = call1 (Vregion_extract_function, Qnil);
		  if (XFIXNUM (Flength (txt)) > 0)
		    /* Don't set empty selections.  */
		    call2 (Qgui_set_selection, QPRIMARY, txt);
		}

	      if (current_buffer != prev_buffer || MODIFF != prev_modiff)
		run_hook (intern ("activate-mark-hook"));
	    }

	  Vsaved_region_selection = Qnil;
	}

    finalize:

      if (current_buffer == prev_buffer
	  && XBUFFER (XWINDOW (selected_window)->contents) == current_buffer
	  && last_point_position != PT
	  && NILP (Vdisable_point_adjustment)
	  && NILP (Vglobal_disable_point_adjustment))
	{
	  if (last_point_position > BEGV
	      && last_point_position < ZV
	      && (composition_adjust_point (last_point_position,
					    last_point_position)
		  != last_point_position))
	    /* The last point was temporarily set within a grapheme
	       cluster to prevent automatic composition.  To recover
	       the automatic composition, we must update the
	       display.  */
	    windows_or_buffers_changed = 21;
	  if (!already_adjusted)
	    adjust_point_for_property (last_point_position,
				       MODIFF != prev_modiff);
	}

      /* Install chars successfully executed in kbd macro.  */

      if (!NILP (KVAR (current_kboard, defining_kbd_macro))
	  && NILP (KVAR (current_kboard, Vprefix_arg)))
	finalize_kbd_macro_chars ();
    }
}

Lisp_Object
read_menu_command (void)
{
  ptrdiff_t count = SPECPDL_INDEX ();

  /* We don't want to echo the keystrokes while navigating the
     menus.  */
  specbind (Qecho_keystrokes, make_fixnum (0));

  Lisp_Object keybuf[READ_KEY_ELTS];
  int i = read_key_sequence (keybuf, Qnil, false, true, true, true);

  unbind_to (count, Qnil);

  if (! FRAME_LIVE_P (XFRAME (selected_frame)))
    Fkill_emacs (Qnil);
  if (i == 0 || i == -1)
    return Qt;

  return read_key_sequence_cmd;
}

/* Adjust point to a boundary of a region that has such a property
   that should be treated intangible.  For the moment, we check
   `composition', `display' and `invisible' properties.
   LAST_PT is the last position of point.  */

static void
adjust_point_for_property (ptrdiff_t last_pt, bool modified)
{
  ptrdiff_t beg, end;
  Lisp_Object val, overlay, tmp;
  /* When called after buffer modification, we should temporarily
     suppress the point adjustment for automatic composition so that a
     user can keep inserting another character at point or keep
     deleting characters around point.  */
  bool check_composition = ! modified;
  bool check_display = true, check_invisible = true;
  ptrdiff_t orig_pt = PT;

  eassert (XBUFFER (XWINDOW (selected_window)->contents) == current_buffer);

  /* FIXME: cycling is probably not necessary because these properties
     can't be usefully combined anyway.  */
  while (check_composition || check_display || check_invisible)
    {
      /* FIXME: check `intangible'.  */
      if (check_composition
	  && PT > BEGV && PT < ZV
	  && (beg = composition_adjust_point (last_pt, PT)) != PT)
	{
	  SET_PT (beg);
	  check_display = check_invisible = true;
	}
      check_composition = false;
      if (check_display
	  && PT > BEGV && PT < ZV
	  && !NILP (val = get_char_property_and_overlay
		              (make_fixnum (PT), Qdisplay, selected_window,
			       &overlay))
	  && display_prop_intangible_p (val, overlay, PT, PT_BYTE)
	  && (!OVERLAYP (overlay)
	      ? get_property_and_range (PT, Qdisplay, &val, &beg, &end, Qnil)
	      : (beg = OVERLAY_POSITION (OVERLAY_START (overlay)),
		 end = OVERLAY_POSITION (OVERLAY_END (overlay))))
	  && (beg < PT /* && end > PT   <- It's always the case.  */
	      || (beg <= PT && STRINGP (val) && SCHARS (val) == 0)))
	{
	  eassert (end > PT);
	  SET_PT (PT < last_pt
		  ? (STRINGP (val) && SCHARS (val) == 0
		     ? max (beg - 1, BEGV)
		     : beg)
		  : end);
	  check_composition = check_invisible = true;
	}
      check_display = false;
      if (check_invisible && PT > BEGV && PT < ZV)
	{
	  int inv;
	  bool ellipsis = false;
	  beg = end = PT;

	  /* Find boundaries `beg' and `end' of the invisible area, if any.  */
	  while (end < ZV
#if 0
		 /* FIXME: We should stop if we find a spot between
		    two runs of `invisible' where inserted text would
		    be visible.  This is important when we have two
		    invisible boundaries that enclose an area: if the
		    area is empty, we need this test in order to make
		    it possible to place point in the middle rather
		    than skip both boundaries.  However, this code
		    also stops anywhere in a non-sticky text-property,
		    which breaks (e.g.) Org mode.  */
		 && (val = Fget_pos_property (make_fixnum (end),
					      Qinvisible, Qnil),
		     TEXT_PROP_MEANS_INVISIBLE (val))
#endif
		 && !NILP (val = get_char_property_and_overlay
		           (make_fixnum (end), Qinvisible, Qnil, &overlay))
		 && (inv = TEXT_PROP_MEANS_INVISIBLE (val)))
	    {
	      ellipsis = ellipsis || inv > 1
		|| (OVERLAYP (overlay)
		    && (!NILP (Foverlay_get (overlay, Qafter_string))
			|| !NILP (Foverlay_get (overlay, Qbefore_string))));
	      tmp = Fnext_single_char_property_change
		(make_fixnum (end), Qinvisible, Qnil, Qnil);
	      end = FIXNATP (tmp) ? XFIXNAT (tmp) : ZV;
	    }
	  while (beg > BEGV
#if 0
		 && (val = Fget_pos_property (make_fixnum (beg),
					      Qinvisible, Qnil),
		     TEXT_PROP_MEANS_INVISIBLE (val))
#endif
		 && !NILP (val = get_char_property_and_overlay
		           (make_fixnum (beg - 1), Qinvisible, Qnil, &overlay))
		 && (inv = TEXT_PROP_MEANS_INVISIBLE (val)))
	    {
	      ellipsis = ellipsis || inv > 1
		|| (OVERLAYP (overlay)
		    && (!NILP (Foverlay_get (overlay, Qafter_string))
			|| !NILP (Foverlay_get (overlay, Qbefore_string))));
	      tmp = Fprevious_single_char_property_change
		(make_fixnum (beg), Qinvisible, Qnil, Qnil);
	      beg = FIXNATP (tmp) ? XFIXNAT (tmp) : BEGV;
	    }

	  /* Move away from the inside area.  */
	  if (beg < PT && end > PT)
	    {
	      SET_PT ((orig_pt == PT && (last_pt < beg || last_pt > end))
		      /* We haven't moved yet (so we don't need to fear
			 infinite-looping) and we were outside the range
			 before (so either end of the range still corresponds
			 to a move in the right direction): pretend we moved
			 less than we actually did, so that we still have
			 more freedom below in choosing which end of the range
			 to go to.  */
		      ? (orig_pt = -1, PT < last_pt ? end : beg)
		      /* We either have moved already or the last point
			 was already in the range: we don't get to choose
			 which end of the range we have to go to.  */
		      : (PT < last_pt ? beg : end));
	      check_composition = check_display = true;
	    }
#if 0 /* This assertion isn't correct, because SET_PT may end up setting
	 the point to something other than its argument, due to
	 point-motion hooks, intangibility, etc.  */
	  eassert (PT == beg || PT == end);
#endif

	  /* Pretend the area doesn't exist if the buffer is not
	     modified.  */
	  if (!modified && !ellipsis && beg < end)
	    {
	      if (last_pt == beg && PT == end && end < ZV)
		(check_composition = check_display = true, SET_PT (end + 1));
	      else if (last_pt == end && PT == beg && beg > BEGV)
		(check_composition = check_display = true, SET_PT (beg - 1));
	      else if (PT == ((PT < last_pt) ? beg : end))
		/* We've already moved as far as we can.  Trying to go
		   to the other end would mean moving backwards and thus
		   could lead to an infinite loop.  */
		;
	      else if (val = Fget_pos_property (make_fixnum (PT),
						Qinvisible, Qnil),
		       TEXT_PROP_MEANS_INVISIBLE (val)
		       && (val = (Fget_pos_property
				  (make_fixnum (PT == beg ? end : beg),
				   Qinvisible, Qnil)),
			   !TEXT_PROP_MEANS_INVISIBLE (val)))
		(check_composition = check_display = true,
		 SET_PT (PT == beg ? end : beg));
	    }
	}
      check_invisible = false;
    }
}

/* Subroutine for safe_run_hooks: run the hook, which is ARGS[1].  */

static Lisp_Object
safe_run_hooks_1 (ptrdiff_t nargs, Lisp_Object *args)
{
  eassert (nargs == 2);
  return call0 (args[1]);
}

/* Subroutine for safe_run_hooks: handle an error by clearing out the function
   from the hook.  */

static Lisp_Object
safe_run_hooks_error (Lisp_Object error, ptrdiff_t nargs, Lisp_Object *args)
{
  eassert (nargs == 2);
  AUTO_STRING (format, "Error in %s (%S): %S");
  Lisp_Object hook = args[0];
  Lisp_Object fun = args[1];
  CALLN (Fmessage, format, hook, fun, error);

  if (SYMBOLP (hook))
    {
      bool found = false;
      Lisp_Object newval = Qnil;
      Lisp_Object val = find_symbol_value (hook);
      FOR_EACH_TAIL (val)
	if (EQ (fun, XCAR (val)))
	  found = true;
	else
	  newval = Fcons (XCAR (val), newval);
      if (found)
	return Fset (hook, Fnreverse (newval));
      /* Not found in the local part of the hook.  Let's look at the global
	 part.  */
      newval = Qnil;
      val = NILP (Fdefault_boundp (hook)) ? Qnil : Fdefault_value (hook);
      FOR_EACH_TAIL (val)
	if (EQ (fun, XCAR (val)))
	  found = true;
	else
	  newval = Fcons (XCAR (val), newval);
      if (found)
	return Fset_default (hook, Fnreverse (newval));
    }
  return Qnil;
}

static Lisp_Object
safe_run_hook_funcall (ptrdiff_t nargs, Lisp_Object *args)
{
  eassert (nargs == 2);
  /* Yes, run_hook_with_args works with args in the other order.  */
  internal_condition_case_n (safe_run_hooks_1,
			     2, ((Lisp_Object []) {args[1], args[0]}),
			     Qt, safe_run_hooks_error);
  return Qnil;
}

/* If we get an error while running the hook, cause the hook variable
   to be nil.  Also inhibit quits, so that C-g won't cause the hook
   to mysteriously evaporate.  */

void
safe_run_hooks (Lisp_Object hook)
{
  ptrdiff_t count = SPECPDL_INDEX ();

  specbind (Qinhibit_quit, Qt);
  run_hook_with_args (2, ((Lisp_Object []) {hook, hook}), safe_run_hook_funcall);
  unbind_to (count, Qnil);
}

\f
/* Nonzero means polling for input is temporarily suppressed.  */

int poll_suppress_count;


#ifdef POLL_FOR_INPUT

/* Asynchronous timer for polling.  */

static struct atimer *poll_timer;

#if defined CYGWIN || defined DOS_NT
/* Poll for input, so that we catch a C-g if it comes in.  */
void
poll_for_input_1 (void)
{
  if (! input_blocked_p ()
      && !waiting_for_input)
    gobble_input ();
}
#endif

/* Timer callback function for poll_timer.  TIMER is equal to
   poll_timer.  */

static void
poll_for_input (struct atimer *timer)
{
  if (poll_suppress_count == 0)
    pending_signals = true;
}

#endif /* POLL_FOR_INPUT */

/* Begin signals to poll for input, if they are appropriate.
   This function is called unconditionally from various places.  */

void
start_polling (void)
{
#ifdef POLL_FOR_INPUT
  /* XXX This condition was (read_socket_hook && !interrupt_input),
     but read_socket_hook is not global anymore.  Let's pretend that
     it's always set.  */
  if (!interrupt_input)
    {
      /* Turn alarm handling on unconditionally.  It might have
	 been turned off in process.c.  */
      turn_on_atimers (1);

      /* If poll timer doesn't exist, or we need one with
	 a different interval, start a new one.  */
      if (poll_timer == NULL
	  || poll_timer->interval.tv_sec != polling_period)
	{
	  time_t period = max (1, min (polling_period, TYPE_MAXIMUM (time_t)));
	  struct timespec interval = make_timespec (period, 0);

	  if (poll_timer)
	    cancel_atimer (poll_timer);

	  poll_timer = start_atimer (ATIMER_CONTINUOUS, interval,
				     poll_for_input, NULL);
	}

      /* Let the timer's callback function poll for input
	 if this becomes zero.  */
      --poll_suppress_count;
    }
#endif
}

#if defined CYGWIN || defined DOS_NT
/* True if we are using polling to handle input asynchronously.  */

bool
input_polling_used (void)
{
# ifdef POLL_FOR_INPUT
  /* XXX This condition was (read_socket_hook && !interrupt_input),
     but read_socket_hook is not global anymore.  Let's pretend that
     it's always set.  */
  return !interrupt_input;
# else
  return false;
# endif
}
#endif

/* Turn off polling.  */

void
stop_polling (void)
{
#ifdef POLL_FOR_INPUT
  /* XXX This condition was (read_socket_hook && !interrupt_input),
     but read_socket_hook is not global anymore.  Let's pretend that
     it's always set.  */
  if (!interrupt_input)
    ++poll_suppress_count;
#endif
}

/* Set the value of poll_suppress_count to COUNT
   and start or stop polling accordingly.  */

void
set_poll_suppress_count (int count)
{
#ifdef POLL_FOR_INPUT
  if (count == 0 && poll_suppress_count != 0)
    {
      poll_suppress_count = 1;
      start_polling ();
    }
  else if (count != 0 && poll_suppress_count == 0)
    {
      stop_polling ();
    }
  poll_suppress_count = count;
#endif
}

/* Bind polling_period to a value at least N.
   But don't decrease it.  */

void
bind_polling_period (int n)
{
#ifdef POLL_FOR_INPUT
  intmax_t new = polling_period;

  if (n > new)
    new = n;

  stop_other_atimers (poll_timer);
  stop_polling ();
  specbind (Qpolling_period, make_int (new));
  /* Start a new alarm with the new period.  */
  start_polling ();
#endif
}
\f
/* Apply the control modifier to CHARACTER.  */

int
make_ctrl_char (int c)
{
  /* Save the upper bits here.  */
  int upper = c & ~0177;

  if (! ASCII_CHAR_P (c))
    return c |= ctrl_modifier;

  c &= 0177;

  /* Everything in the columns containing the upper-case letters
     denotes a control character.  */
  if (c >= 0100 && c < 0140)
    {
      int oc = c;
      c &= ~0140;
      /* Set the shift modifier for a control char
	 made from a shifted letter.  But only for letters!  */
      if (oc >= 'A' && oc <= 'Z')
	c |= shift_modifier;
    }

  /* The lower-case letters denote control characters too.  */
  else if (c >= 'a' && c <= 'z')
    c &= ~0140;

  /* Include the bits for control and shift
     only if the basic ASCII code can't indicate them.  */
  else if (c >= ' ')
    c |= ctrl_modifier;

  /* Replace the high bits.  */
  c |= (upper & ~ctrl_modifier);

  return c;
}

/* Substitute key descriptions and quotes in HELP, unless its first
   character has a non-nil help-echo-inhibit-substitution property.  */

static Lisp_Object
help_echo_substitute_command_keys (Lisp_Object help)
{
  if (STRINGP (help)
      && SCHARS (help) > 0
      && !NILP (Fget_text_property (make_fixnum (0),
                                    Qhelp_echo_inhibit_substitution,
                                    help)))
    return help;

  return call1 (Qsubstitute_command_keys, help);
}

/* Display the help-echo property of the character after the mouse pointer.
   Either show it in the echo area, or call show-help-function to display
   it by other means (maybe in a tooltip).

   If HELP is nil, that means clear the previous help echo.

   If HELP is a string, display that string.  If HELP is a function,
   call it with OBJECT and POS as arguments; the function should
   return a help string or nil for none.  For all other types of HELP,
   evaluate it to obtain a string.

   WINDOW is the window in which the help was generated, if any.
   It is nil if not in a window.

   If OBJECT is a buffer, POS is the position in the buffer where the
   `help-echo' text property was found.

   If OBJECT is an overlay, that overlay has a `help-echo' property,
   and POS is the position in the overlay's buffer under the mouse.

   If OBJECT is a string (an overlay string or a string displayed with
   the `display' property).  POS is the position in that string under
   the mouse.

   Note: this function may only be called with HELP nil or a string
   from X code running asynchronously.  */

void
show_help_echo (Lisp_Object help, Lisp_Object window, Lisp_Object object,
		Lisp_Object pos)
{
  if (!NILP (help) && !STRINGP (help))
    {
      if (FUNCTIONP (help))
	help = safe_call (4, help, window, object, pos);
      else
	help = safe_eval (help);

      if (!STRINGP (help))
	return;
    }

  if (!noninteractive && STRINGP (help))
    {
      /* The mouse-fixup-help-message Lisp function can call
	 mouse_position_hook, which resets the mouse_moved flags.
	 This causes trouble if we are trying to read a mouse motion
	 event (i.e., if we are inside a `track-mouse' form), so we
	 restore the mouse_moved flag.  */
      struct frame *f = some_mouse_moved ();

      help = call1 (Qmouse_fixup_help_message, help);
      if (f)
	f->mouse_moved = true;
    }

  if (STRINGP (help) || NILP (help))
    {
      if (!NILP (Vshow_help_function))
	call1 (Vshow_help_function, help_echo_substitute_command_keys (help));
      help_echo_showing_p = STRINGP (help);
    }
}


\f
/* Input of single characters from keyboard.  */

static Lisp_Object kbd_buffer_get_event (KBOARD **kbp, bool *used_mouse_menu,
					 struct timespec *end_time);
static void record_char (Lisp_Object c);

static Lisp_Object help_form_saved_window_configs;
static void
read_char_help_form_unwind (void)
{
  Lisp_Object window_config = XCAR (help_form_saved_window_configs);
  help_form_saved_window_configs = XCDR (help_form_saved_window_configs);
  if (!NILP (window_config))
    Fset_window_configuration (window_config, Qnil, Qnil);
}

#define STOP_POLLING					\
do { if (! polling_stopped_here) stop_polling ();	\
       polling_stopped_here = true; } while (0)

#define RESUME_POLLING					\
do { if (polling_stopped_here) start_polling ();	\
       polling_stopped_here = false; } while (0)

static Lisp_Object
read_event_from_main_queue (struct timespec *end_time,
                            sys_jmp_buf local_getcjmp,
                            bool *used_mouse_menu)
{
  Lisp_Object c = Qnil;
  sys_jmp_buf save_jump;
  KBOARD *kb;

 start:

  /* Read from the main queue, and if that gives us something we can't use yet,
     we put it on the appropriate side queue and try again.  */

  if (end_time && timespec_cmp (*end_time, current_timespec ()) <= 0)
    return c;

  /* Actually read a character, waiting if necessary.  */
  ptrdiff_t count = SPECPDL_INDEX ();
  save_getcjmp (save_jump);
  record_unwind_protect_ptr (restore_getcjmp, save_jump);
  restore_getcjmp (local_getcjmp);
  if (!end_time)
    timer_start_idle ();
  c = kbd_buffer_get_event (&kb, used_mouse_menu, end_time);
  unbind_to (count, Qnil);

  if (! NILP (c) && (kb != current_kboard))
    {
      Lisp_Object last = KVAR (kb, kbd_queue);
      if (CONSP (last))
        {
          while (CONSP (XCDR (last)))
	    last = XCDR (last);
          if (!NILP (XCDR (last)))
	    emacs_abort ();
        }
      if (!CONSP (last))
        kset_kbd_queue (kb, list1 (c));
      else
        XSETCDR (last, list1 (c));
      kb->kbd_queue_has_data = true;
      c = Qnil;
      if (single_kboard)
        goto start;
      current_kboard = kb;
      return make_fixnum (-2);
    }

  /* Terminate Emacs in batch mode if at eof.  */
  if (noninteractive && FIXNUMP (c) && XFIXNUM (c) < 0)
    Fkill_emacs (make_fixnum (1));

  if (FIXNUMP (c))
    {
      /* Add in any extra modifiers, where appropriate.  */
      if ((extra_keyboard_modifiers & CHAR_CTL)
	  || ((extra_keyboard_modifiers & 0177) < ' '
	      && (extra_keyboard_modifiers & 0177) != 0))
	XSETINT (c, make_ctrl_char (XFIXNUM (c)));

      /* Transfer any other modifier bits directly from
	 extra_keyboard_modifiers to c.  Ignore the actual character code
	 in the low 16 bits of extra_keyboard_modifiers.  */
      XSETINT (c, XFIXNUM (c) | (extra_keyboard_modifiers & ~0xff7f & ~CHAR_CTL));
    }

  return c;
}



/* Like `read_event_from_main_queue' but applies keyboard-coding-system
   to tty input.  */
static Lisp_Object
read_decoded_event_from_main_queue (struct timespec *end_time,
                                    sys_jmp_buf local_getcjmp,
                                    Lisp_Object prev_event,
                                    bool *used_mouse_menu)
{
#ifndef WINDOWSNT
#define MAX_ENCODED_BYTES 16
  Lisp_Object events[MAX_ENCODED_BYTES];
  int n = 0;
#endif
  while (true)
    {
      Lisp_Object nextevt
        = read_event_from_main_queue (end_time, local_getcjmp,
                                      used_mouse_menu);
#ifdef WINDOWSNT
      /* w32_console already returns decoded events.  It either reads
	 Unicode characters from the Windows keyboard input, or
	 converts characters encoded in the current codepage into
	 Unicode.  See w32inevt.c:key_event, near its end.  */
      return nextevt;
#else
      struct frame *frame = XFRAME (selected_frame);
      struct terminal *terminal = frame->terminal;
      if (!((FRAME_TERMCAP_P (frame) || FRAME_MSDOS_P (frame))
            /* Don't apply decoding if we're just reading a raw event
               (e.g. reading bytes sent by the xterm to specify the position
               of a mouse click).  */
            && (!EQ (prev_event, Qt))
	    && (TERMINAL_KEYBOARD_CODING (terminal)->common_flags
		& CODING_REQUIRE_DECODING_MASK)))
	return nextevt;		/* No decoding needed.  */
      else
	{
	  int meta_key = terminal->display_info.tty->meta_key;
	  eassert (n < MAX_ENCODED_BYTES);
	  events[n++] = nextevt;
	  if (FIXNATP (nextevt)
	      && XFIXNUM (nextevt) < (meta_key == 1 ? 0x80 : 0x100))
	    { /* An encoded byte sequence, let's try to decode it.  */
	      struct coding_system *coding
		= TERMINAL_KEYBOARD_CODING (terminal);

	      if (raw_text_coding_system_p (coding))
		{
		  int i;
		  if (meta_key != 2)
		    {
		      for (i = 0; i < n; i++)
			{
			  int c = XFIXNUM (events[i]);
			  int modifier =
			    (meta_key == 3 && c < 0x100 && (c & 0x80))
			    ? meta_modifier
			    : 0;
			  events[i] = make_fixnum ((c & ~0x80) | modifier);
			}
		    }
		}
	      else
		{
		  unsigned char src[MAX_ENCODED_BYTES];
		  unsigned char dest[MAX_ENCODED_BYTES * MAX_MULTIBYTE_LENGTH];
		  int i;
		  for (i = 0; i < n; i++)
		    src[i] = XFIXNUM (events[i]);
		  if (meta_key < 2) /* input-meta-mode is t or nil */
		    for (i = 0; i < n; i++)
		      src[i] &= ~0x80;
		  coding->destination = dest;
		  coding->dst_bytes = sizeof dest;
		  decode_coding_c_string (coding, src, n, Qnil);
		  eassert (coding->produced_char <= n);
		  if (coding->produced_char == 0)
		    { /* The encoded sequence is incomplete.  */
		      if (n < MAX_ENCODED_BYTES) /* Avoid buffer overflow.  */
			continue;		     /* Read on!  */
		    }
		  else
		    {
		      const unsigned char *p = coding->destination;
		      eassert (coding->carryover_bytes == 0);
		      n = 0;
		      while (n < coding->produced_char)
			{
			  int c = string_char_advance (&p);
			  if (meta_key == 3)
			    {
			      int modifier
				= (c < 0x100 && (c & 0x80)
				   ? meta_modifier
				   : 0);
			      c = (c & ~0x80) | modifier;
			    }
			  events[n++] = make_fixnum (c);
			}
		    }
		}
	    }
	  /* Now `events' should hold decoded events.
	     Normally, n should be equal to 1, but better not rely on it.
	     We can only return one event here, so return the first we
	     had and keep the others (if any) for later.  */
	  while (n > 1)
	    Vunread_command_events
	      = Fcons (events[--n], Vunread_command_events);
	  return events[0];
	}
#endif
    }
}

/* Read a character from the keyboard; call the redisplay if needed.  */
/* commandflag 0 means do not autosave, but do redisplay.
   -1 means do not redisplay, but do autosave.
   -2 means do neither.
   1 means do both.

   The argument MAP is a keymap for menu prompting.

   PREV_EVENT is the previous input event, or nil if we are reading
   the first event of a key sequence (or not reading a key sequence).
   If PREV_EVENT is t, that is a "magic" value that says
   not to run input methods, but in other respects to act as if
   not reading a key sequence.

   If USED_MOUSE_MENU is non-null, then set *USED_MOUSE_MENU to true
   if we used a mouse menu to read the input, or false otherwise.  If
   USED_MOUSE_MENU is null, don't dereference it.

   Value is -2 when we find input on another keyboard.  A second call
   to read_char will read it.

   If END_TIME is non-null, it is a pointer to a struct timespec
   specifying the maximum time to wait until.  If no input arrives by
   that time, stop waiting and return nil.

   Value is t if we showed a menu and the user rejected it.  */

Lisp_Object
read_char (int commandflag, Lisp_Object map,
	   Lisp_Object prev_event,
	   bool *used_mouse_menu, struct timespec *end_time)
{
  Lisp_Object c;
  ptrdiff_t jmpcount;
  sys_jmp_buf local_getcjmp;
  sys_jmp_buf save_jump;
  Lisp_Object tem, save;
  volatile Lisp_Object previous_echo_area_message;
  volatile Lisp_Object also_record;
  volatile bool reread, recorded;
  bool volatile polling_stopped_here = false;
  struct kboard *orig_kboard = current_kboard;

  also_record = Qnil;

  c = Qnil;
  previous_echo_area_message = Qnil;

 retry:

  recorded = false;

  if (CONSP (Vunread_post_input_method_events))
    {
      c = XCAR (Vunread_post_input_method_events);
      Vunread_post_input_method_events
	= XCDR (Vunread_post_input_method_events);

      /* Undo what read_char_x_menu_prompt did when it unread
	 additional keys returned by Fx_popup_menu.  */
      if (CONSP (c)
	  && (SYMBOLP (XCAR (c)) || FIXNUMP (XCAR (c)))
	  && NILP (XCDR (c)))
	c = XCAR (c);

      reread = true;
      goto reread_first;
    }
  else
    reread = false;


  if (CONSP (Vunread_command_events))
    {
      bool was_disabled = false;

      c = XCAR (Vunread_command_events);
      Vunread_command_events = XCDR (Vunread_command_events);

      /* Undo what sit-for did when it unread additional keys
	 inside universal-argument.  */

      if (CONSP (c) && EQ (XCAR (c), Qt))
	c = XCDR (c);
      else
	{
	  if (CONSP (c) && EQ (XCAR (c), Qno_record))
	    {
	      c = XCDR (c);
	      recorded = true;
	    }
	  reread = true;
	}

      /* Undo what read_char_x_menu_prompt did when it unread
	 additional keys returned by Fx_popup_menu.  */
      if (CONSP (c)
	  && EQ (XCDR (c), Qdisabled)
	  && (SYMBOLP (XCAR (c)) || FIXNUMP (XCAR (c))))
	{
	  was_disabled = true;
	  c = XCAR (c);
	}

      /* If the queued event is something that used the mouse,
         set used_mouse_menu accordingly.  */
      if (used_mouse_menu
	  /* Also check was_disabled so last-nonmenu-event won't return
	     a bad value when submenus are involved.  (Bug#447)  */
	  && (EQ (c, Qtool_bar) || EQ (c, Qtab_bar) || EQ (c, Qmenu_bar)
	      || was_disabled))
	*used_mouse_menu = true;

      goto reread_for_input_method;
    }

  if (CONSP (Vunread_input_method_events))
    {
      c = XCAR (Vunread_input_method_events);
      Vunread_input_method_events = XCDR (Vunread_input_method_events);

      /* Undo what read_char_x_menu_prompt did when it unread
	 additional keys returned by Fx_popup_menu.  */
      if (CONSP (c)
	  && (SYMBOLP (XCAR (c)) || FIXNUMP (XCAR (c)))
	  && NILP (XCDR (c)))
	c = XCAR (c);
      reread = true;
      goto reread_for_input_method;
    }

  if (!NILP (Vexecuting_kbd_macro))
    {
      /* We set this to Qmacro; since that's not a frame, nobody will
	 try to switch frames on us, and the selected window will
	 remain unchanged.

         Since this event came from a macro, it would be misleading to
	 leave internal_last_event_frame set to wherever the last
	 real event came from.  Normally, a switch-frame event selects
	 internal_last_event_frame after each command is read, but
	 events read from a macro should never cause a new frame to be
	 selected.  */
      Vlast_event_frame = internal_last_event_frame = Qmacro;

      /* Exit the macro if we are at the end.
	 Also, some things replace the macro with t
	 to force an early exit.  */
      if (EQ (Vexecuting_kbd_macro, Qt)
	  || executing_kbd_macro_index >= XFIXNAT (Flength (Vexecuting_kbd_macro)))
	{
	  XSETINT (c, -1);
	  goto exit;
	}

      c = Faref (Vexecuting_kbd_macro, make_int (executing_kbd_macro_index));
      if (STRINGP (Vexecuting_kbd_macro)
	  && (XFIXNAT (c) & 0x80) && (XFIXNAT (c) <= 0xff))
	XSETFASTINT (c, CHAR_META | (XFIXNAT (c) & ~0x80));

      executing_kbd_macro_index++;

      goto from_macro;
    }

  if (!NILP (unread_switch_frame))
    {
      c = unread_switch_frame;
      unread_switch_frame = Qnil;

      /* This event should make it into this_command_keys, and get echoed
	 again, so we do not set `reread'.  */
      goto reread_first;
    }

  /* If redisplay was requested.  */
  if (commandflag >= 0)
    {
      bool echo_current = EQ (echo_message_buffer, echo_area_buffer[0]);

	/* If there is pending input, process any events which are not
	   user-visible, such as X selection_request events.  */
      if (input_pending
	  || detect_input_pending_run_timers (0))
	swallow_events (false);		/* May clear input_pending.  */

      /* Redisplay if no pending input.  */
      while (!(input_pending
	       && (input_was_pending || !redisplay_dont_pause)))
	{
	  input_was_pending = input_pending;
	  if (help_echo_showing_p && !EQ (selected_window, minibuf_window))
	    redisplay_preserve_echo_area (5);
	  else
	    redisplay ();

	  if (!input_pending)
	    /* Normal case: no input arrived during redisplay.  */
	    break;

	  /* Input arrived and pre-empted redisplay.
	     Process any events which are not user-visible.  */
	  swallow_events (false);
	  /* If that cleared input_pending, try again to redisplay.  */
	}

      /* Prevent the redisplay we just did
	 from messing up echoing of the input after the prompt.  */
      if (commandflag == 0 && echo_current)
	echo_message_buffer = echo_area_buffer[0];

    }

  /* Message turns off echoing unless more keystrokes turn it on again.

     The code in 20.x for the condition was

     1. echo_area_glyphs && *echo_area_glyphs
     2. && echo_area_glyphs != current_kboard->echobuf
     3. && ok_to_echo_at_next_pause != echo_area_glyphs

     (1) means there's a current message displayed

     (2) means it's not the message from echoing from the current
     kboard.

     (3) There's only one place in 20.x where ok_to_echo_at_next_pause
     is set to a non-null value.  This is done in read_char and it is
     set to echo_area_glyphs.  That means
     ok_to_echo_at_next_pause is either null or
     current_kboard->echobuf with the appropriate current_kboard at
     that time.

     So, condition (3) means in clear text ok_to_echo_at_next_pause
     must be either null, or the current message isn't from echoing at
     all, or it's from echoing from a different kboard than the
     current one.  */

  if (/* There currently is something in the echo area.  */
      !NILP (echo_area_buffer[0])
      && (/* It's an echo from a different kboard.  */
	  echo_kboard != current_kboard
	  /* Or we explicitly allow overwriting whatever there is.  */
	  || ok_to_echo_at_next_pause == NULL))
    cancel_echoing ();
  else
    echo_dash ();

  /* Try reading a character via menu prompting in the minibuf.
     Try this before the sit-for, because the sit-for
     would do the wrong thing if we are supposed to do
     menu prompting. If EVENT_HAS_PARAMETERS then we are reading
     after a mouse event so don't try a minibuf menu.  */
  c = Qnil;
  if (KEYMAPP (map) && INTERACTIVE
      && !NILP (prev_event) && ! EVENT_HAS_PARAMETERS (prev_event)
      /* Don't bring up a menu if we already have another event.  */
      && !CONSP (Vunread_command_events)
      && !detect_input_pending_run_timers (0))
    {
      c = read_char_minibuf_menu_prompt (commandflag, map);

      if (FIXNUMP (c) && XFIXNUM (c) == -2)
        return c;               /* wrong_kboard_jmpbuf */

      if (! NILP (c))
	goto exit;
    }

  /* Make a longjmp point for quits to use, but don't alter getcjmp just yet.
     We will do that below, temporarily for short sections of code,
     when appropriate.  local_getcjmp must be in effect
     around any call to sit_for or kbd_buffer_get_event;
     it *must not* be in effect when we call redisplay.  */

  jmpcount = SPECPDL_INDEX ();
  if (sys_setjmp (local_getcjmp))
    {
      /* Handle quits while reading the keyboard.  */
      /* We must have saved the outer value of getcjmp here,
	 so restore it now.  */
      restore_getcjmp (save_jump);
      pthread_sigmask (SIG_SETMASK, &empty_mask, 0);
      unbind_to (jmpcount, Qnil);
      /* If we are in while-no-input, don't trigger C-g, as that will
	 quit instead of letting while-no-input do its thing.  */
      if (!EQ (Vquit_flag, Vthrow_on_input))
	XSETINT (c, quit_char);
      internal_last_event_frame = selected_frame;
      Vlast_event_frame = internal_last_event_frame;
      /* If we report the quit char as an event,
	 don't do so more than once.  */
      if (!NILP (Vinhibit_quit))
	Vquit_flag = Qnil;

      {
	KBOARD *kb = FRAME_KBOARD (XFRAME (selected_frame));
	if (kb != current_kboard)
	  {
	    Lisp_Object last = KVAR (kb, kbd_queue);
	    /* We shouldn't get here if we were in single-kboard mode!  */
	    if (single_kboard)
	      emacs_abort ();
	    if (CONSP (last))
	      {
		while (CONSP (XCDR (last)))
		  last = XCDR (last);
		if (!NILP (XCDR (last)))
		  emacs_abort ();
	      }
	    if (!CONSP (last))
	      kset_kbd_queue (kb, list1 (c));
	    else
	      XSETCDR (last, list1 (c));
	    kb->kbd_queue_has_data = true;
	    current_kboard = kb;
            return make_fixnum (-2); /* wrong_kboard_jmpbuf */
	  }
      }
      goto non_reread;
    }

  /* Start idle timers if no time limit is supplied.  We don't do it
     if a time limit is supplied to avoid an infinite recursion in the
     situation where an idle timer calls `sit-for'.  */

  if (!end_time)
    timer_start_idle ();

  /* If in middle of key sequence and minibuffer not active,
     start echoing if enough time elapses.  */

  if (minibuf_level == 0
      && !end_time
      && !current_kboard->immediate_echo
      && (this_command_key_count > 0
	  || !NILP (call0 (Qinternal_echo_keystrokes_prefix)))
      && ! noninteractive
      && echo_keystrokes_p ()
      && (/* No message.  */
	  NILP (echo_area_buffer[0])
	  /* Or empty message.  */
	  || (BUF_BEG (XBUFFER (echo_area_buffer[0]))
	      == BUF_Z (XBUFFER (echo_area_buffer[0])))
	  /* Or already echoing from same kboard.  */
	  || (echo_kboard && ok_to_echo_at_next_pause == echo_kboard)
	  /* Or not echoing before and echoing allowed.  */
	  || (!echo_kboard && ok_to_echo_at_next_pause)))
    {
      /* After a mouse event, start echoing right away.
	 This is because we are probably about to display a menu,
	 and we don't want to delay before doing so.  */
      if (EVENT_HAS_PARAMETERS (prev_event))
	echo_now ();
      else
	{
	  Lisp_Object tem0;

	  ptrdiff_t count = SPECPDL_INDEX ();
	  save_getcjmp (save_jump);
	  record_unwind_protect_ptr (restore_getcjmp, save_jump);
	  restore_getcjmp (local_getcjmp);
	  tem0 = sit_for (Vecho_keystrokes, 1, 1);
	  unbind_to (count, Qnil);
	  if (EQ (tem0, Qt)
	      && ! CONSP (Vunread_command_events))
	    echo_now ();
	}
    }

  /* Maybe auto save due to number of keystrokes.  */

  if (commandflag != 0 && commandflag != -2
      && auto_save_interval > 0
      && num_nonmacro_input_events - last_auto_save > max (auto_save_interval, 20)
      && !detect_input_pending_run_timers (0))
    {
      Fdo_auto_save (auto_save_no_message ? Qt : Qnil, Qnil);
      /* Hooks can actually change some buffers in auto save.  */
      redisplay ();
    }

  /* Try reading using an X menu.
     This is never confused with reading using the minibuf
     because the recursive call of read_char in read_char_minibuf_menu_prompt
     does not pass on any keymaps.  */

  if (KEYMAPP (map) && INTERACTIVE
      && !NILP (prev_event)
      && EVENT_HAS_PARAMETERS (prev_event)
      && !EQ (XCAR (prev_event), Qmenu_bar)
      && !EQ (XCAR (prev_event), Qtab_bar)
      && !EQ (XCAR (prev_event), Qtool_bar)
      /* Don't bring up a menu if we already have another event.  */
      && !CONSP (Vunread_command_events))
    {
      c = read_char_x_menu_prompt (map, prev_event, used_mouse_menu);

      /* Now that we have read an event, Emacs is not idle.  */
      if (!end_time)
	timer_stop_idle ();

      goto exit;
    }

  /* Maybe autosave and/or garbage collect due to idleness.  */

  if (INTERACTIVE && NILP (c))
    {
      int delay_level;
      ptrdiff_t buffer_size;

      /* Slow down auto saves logarithmically in size of current buffer,
	 and garbage collect while we're at it.  */
      if (! MINI_WINDOW_P (XWINDOW (selected_window)))
	last_non_minibuf_size = Z - BEG;
      buffer_size = (last_non_minibuf_size >> 8) + 1;
      delay_level = 0;
      while (buffer_size > 64)
	delay_level++, buffer_size -= buffer_size >> 2;
      if (delay_level < 4) delay_level = 4;
      /* delay_level is 4 for files under around 50k, 7 at 100k,
	 9 at 200k, 11 at 300k, and 12 at 500k.  It is 15 at 1 meg.  */

      /* Auto save if enough time goes by without input.  */
      if (commandflag != 0 && commandflag != -2
	  && num_nonmacro_input_events > last_auto_save
	  && FIXNUMP (Vauto_save_timeout)
	  && XFIXNUM (Vauto_save_timeout) > 0)
	{
	  Lisp_Object tem0;
	  EMACS_INT timeout = XFIXNAT (Vauto_save_timeout);

	  timeout = min (timeout, MOST_POSITIVE_FIXNUM / delay_level * 4);
	  timeout = delay_level * timeout / 4;
	  ptrdiff_t count1 = SPECPDL_INDEX ();
	  save_getcjmp (save_jump);
	  record_unwind_protect_ptr (restore_getcjmp, save_jump);
	  restore_getcjmp (local_getcjmp);
	  tem0 = sit_for (make_fixnum (timeout), 1, 1);
	  unbind_to (count1, Qnil);

	  if (EQ (tem0, Qt)
	      && ! CONSP (Vunread_command_events))
	    {
	      Fdo_auto_save (auto_save_no_message ? Qt : Qnil, Qnil);
	      redisplay ();
	    }
	}

      /* If there is still no input available, ask for GC.  */
      if (!detect_input_pending_run_timers (0))
	maybe_gc ();
    }

  /* Notify the caller if an autosave hook, or a timer, sentinel or
     filter in the sit_for calls above have changed the current
     kboard.  This could happen if they use the minibuffer or start a
     recursive edit, like the fancy splash screen in server.el's
     filter.  If this longjmp wasn't here, read_key_sequence would
     interpret the next key sequence using the wrong translation
     tables and function keymaps.  */
  if (NILP (c) && current_kboard != orig_kboard)
    return make_fixnum (-2);  /* wrong_kboard_jmpbuf */

  /* If this has become non-nil here, it has been set by a timer
     or sentinel or filter.  */
  if (CONSP (Vunread_command_events))
    {
      c = XCAR (Vunread_command_events);
      Vunread_command_events = XCDR (Vunread_command_events);

      if (CONSP (c) && EQ (XCAR (c), Qt))
	c = XCDR (c);
      else
	{
	  if (CONSP (c) && EQ (XCAR (c), Qno_record))
	    {
	      c = XCDR (c);
	      recorded = true;
	    }
	  reread = true;
	}
    }

  /* Read something from current KBOARD's side queue, if possible.  */

  if (NILP (c))
    {
      if (current_kboard->kbd_queue_has_data)
	{
	  if (!CONSP (KVAR (current_kboard, kbd_queue)))
	    emacs_abort ();
	  c = XCAR (KVAR (current_kboard, kbd_queue));
	  kset_kbd_queue (current_kboard,
			  XCDR (KVAR (current_kboard, kbd_queue)));
	  if (NILP (KVAR (current_kboard, kbd_queue)))
	    current_kboard->kbd_queue_has_data = false;
	  input_pending = readable_events (0);
	  if (EVENT_HAS_PARAMETERS (c)
	      && EQ (EVENT_HEAD_KIND (EVENT_HEAD (c)), Qswitch_frame))
	    internal_last_event_frame = XCAR (XCDR (c));
	  Vlast_event_frame = internal_last_event_frame;
	}
    }

  /* If current_kboard's side queue is empty check the other kboards.
     If one of them has data that we have not yet seen here,
     switch to it and process the data waiting for it.

     Note: if the events queued up for another kboard
     have already been seen here, and therefore are not a complete command,
     the kbd_queue_has_data field is 0, so we skip that kboard here.
     That's to avoid an infinite loop switching between kboards here.  */
  if (NILP (c) && !single_kboard)
    {
      KBOARD *kb;
      for (kb = all_kboards; kb; kb = kb->next_kboard)
	if (kb->kbd_queue_has_data)
	  {
	    current_kboard = kb;
            return make_fixnum (-2); /* wrong_kboard_jmpbuf */
	  }
    }

 wrong_kboard:

  STOP_POLLING;

  if (NILP (c))
    {
      c = read_decoded_event_from_main_queue (end_time, local_getcjmp,
                                              prev_event, used_mouse_menu);
      if (NILP (c) && end_time
	  && timespec_cmp (*end_time, current_timespec ()) <= 0)
        {
          goto exit;
        }

      if (EQ (c, make_fixnum (-2)))
	return c;

      if (CONSP (c) && EQ (XCAR (c), Qt))
	c = XCDR (c);
      else if (CONSP (c) && EQ (XCAR (c), Qno_record))
	{
	  c = XCDR (c);
	  recorded = true;
	}
  }

 non_reread:

  if (!end_time)
    timer_stop_idle ();
  RESUME_POLLING;

  if (NILP (c))
    {
      if (commandflag >= 0
	  && !input_pending && !detect_input_pending_run_timers (0))
	redisplay ();

      goto wrong_kboard;
    }

  /* Buffer switch events are only for internal wakeups
     so don't show them to the user.
     Also, don't record a key if we already did.  */
  if (BUFFERP (c))
    goto exit;

  /* Process special events within read_char
     and loop around to read another event.  */
  save = Vquit_flag;
  Vquit_flag = Qnil;
  tem = access_keymap (get_keymap (Vspecial_event_map, 0, 1), c, 0, 0, 1);
  Vquit_flag = save;

  if (!NILP (tem))
    {
      struct buffer *prev_buffer = current_buffer;
      last_input_event = c;
      call4 (Qcommand_execute, tem, Qnil, Fvector (1, &last_input_event), Qt);

      if (CONSP (c)
          && (EQ (XCAR (c), Qselect_window)
              || EQ (XCAR (c), Qfocus_out)
#ifdef HAVE_DBUS
	      || EQ (XCAR (c), Qdbus_event)
#endif
#ifdef USE_FILE_NOTIFY
	      || EQ (XCAR (c), Qfile_notify)
#endif
#ifdef THREADS_ENABLED
	      || EQ (XCAR (c), Qthread_event)
#endif
	      || EQ (XCAR (c), Qconfig_changed_event))
          && !end_time)
	/* We stopped being idle for this event; undo that.  This
	   prevents automatic window selection (under
	   mouse-autoselect-window) from acting as a real input event, for
	   example banishing the mouse under mouse-avoidance-mode.  */
	timer_resume_idle ();

#ifdef HAVE_NS
      if (CONSP (c)
          && (EQ (XCAR (c), intern ("ns-unput-working-text"))))
        input_was_pending = input_pending;
#endif

      if (current_buffer != prev_buffer)
	{
	  /* The command may have changed the keymaps.  Pretend there
	     is input in another keyboard and return.  This will
	     recalculate keymaps.  */
	  c = make_fixnum (-2);
	  goto exit;
	}
      else
	goto retry;
    }

  /* Handle things that only apply to characters.  */
  if (FIXNUMP (c))
    {
      /* If kbd_buffer_get_event gave us an EOF, return that.  */
      if (XFIXNUM (c) == -1)
	goto exit;

      if ((STRINGP (KVAR (current_kboard, Vkeyboard_translate_table))
	   && XFIXNAT (c) < SCHARS (KVAR (current_kboard,
					  Vkeyboard_translate_table)))
	  || (VECTORP (KVAR (current_kboard, Vkeyboard_translate_table))
	      && XFIXNAT (c) < ASIZE (KVAR (current_kboard,
					    Vkeyboard_translate_table)))
	  || (CHAR_TABLE_P (KVAR (current_kboard, Vkeyboard_translate_table))
	      && CHARACTERP (c)))
	{
	  Lisp_Object d;
	  d = Faref (KVAR (current_kboard, Vkeyboard_translate_table), c);
	  /* nil in keyboard-translate-table means no translation.  */
	  if (!NILP (d))
	    c = d;
	}
    }

  /* If this event is a mouse click in the menu bar,
     return just menu-bar for now.  Modify the mouse click event
     so we won't do this twice, then queue it up.  */
  if (EVENT_HAS_PARAMETERS (c)
      && CONSP (XCDR (c))
      && CONSP (xevent_start (c))
      && CONSP (XCDR (xevent_start (c))))
    {
      Lisp_Object posn;

      posn = POSN_POSN (xevent_start (c));
      /* Handle menu-bar events:
	 insert the dummy prefix event `menu-bar'.  */
      if (EQ (posn, Qmenu_bar) || EQ (posn, Qtab_bar) || EQ (posn, Qtool_bar))
	{
	  /* Change menu-bar to (menu-bar) as the event "position".  */
	  POSN_SET_POSN (xevent_start (c), list1 (posn));

	  also_record = c;
	  Vunread_command_events = Fcons (c, Vunread_command_events);
	  c = posn;
	}
    }

  /* Store these characters into recent_keys, the dribble file if any,
     and the keyboard macro being defined, if any.  */
  record_char (c);
  recorded = true;
  if (! NILP (also_record))
    record_char (also_record);

  /* Wipe the echo area.
     But first, if we are about to use an input method,
     save the echo area contents for it to refer to.  */
  if (FIXNUMP (c)
      && ! NILP (Vinput_method_function)
      && ' ' <= XFIXNUM (c) && XFIXNUM (c) < 256 && XFIXNUM (c) != 127)
    {
      previous_echo_area_message = Fcurrent_message ();
      Vinput_method_previous_message = previous_echo_area_message;
    }

  /* Now wipe the echo area, except for help events which do their
     own stuff with the echo area.  */
  if (!CONSP (c)
      || (!(EQ (Qhelp_echo, XCAR (c)))
	  && !(EQ (Qswitch_frame, XCAR (c)))
	  /* Don't wipe echo area for select window events: These might
	     get delayed via `mouse-autoselect-window' (Bug#11304).  */
	  && !(EQ (Qselect_window, XCAR (c)))))
    {
      if (!NILP (echo_area_buffer[0]))
	{
	  safe_run_hooks (Qecho_area_clear_hook);
	  clear_message (1, 0);
	  /* If we were showing the echo-area message on top of an
	     active minibuffer, resize the mini-window, since the
	     minibuffer may need more or less space than the echo area
	     we've just wiped.  */
	  if (minibuf_level
	      && EQ (minibuf_window, echo_area_window)
	      /* The case where minibuffer-message-timeout is a number
		 was already handled near the beginning of command_loop_1.  */
	      && !NUMBERP (Vminibuffer_message_timeout))
	    resize_mini_window (XWINDOW (minibuf_window), false);
	}
      else if (FUNCTIONP (Vclear_message_function))
        clear_message (1, 0);
    }

 reread_for_input_method:
 from_macro:
  /* Pass this to the input method, if appropriate.  */
  if (FIXNUMP (c)
      && ! NILP (Vinput_method_function)
      /* Don't run the input method within a key sequence,
	 after the first event of the key sequence.  */
      && NILP (prev_event)
      && ' ' <= XFIXNUM (c) && XFIXNUM (c) < 256 && XFIXNUM (c) != 127)
    {
      Lisp_Object keys;
      ptrdiff_t key_count;
      ptrdiff_t command_key_start;
      ptrdiff_t count = SPECPDL_INDEX ();

      /* Save the echo status.  */
      bool saved_immediate_echo = current_kboard->immediate_echo;
      struct kboard *saved_ok_to_echo = ok_to_echo_at_next_pause;
      Lisp_Object saved_echo_string = KVAR (current_kboard, echo_string);
      Lisp_Object saved_echo_prompt = KVAR (current_kboard, echo_prompt);

      /* Save the this_command_keys status.  */
      key_count = this_command_key_count;
      command_key_start = this_single_command_key_start;

      if (key_count > 0)
	keys = Fcopy_sequence (this_command_keys);
      else
	keys = Qnil;

      /* Clear out this_command_keys.  */
      this_command_key_count = 0;
      this_single_command_key_start = 0;

      /* Now wipe the echo area.  */
      if (!NILP (echo_area_buffer[0]))
	safe_run_hooks (Qecho_area_clear_hook);
      clear_message (1, 0);
      echo_truncate (0);

      /* If we are not reading a key sequence,
	 never use the echo area.  */
      if (!KEYMAPP (map))
	{
	  specbind (Qinput_method_use_echo_area, Qt);
	}

      /* Call the input method.  */
      tem = call1 (Vinput_method_function, c);

      tem = unbind_to (count, tem);

      /* Restore the saved echoing state
	 and this_command_keys state.  */
      this_command_key_count = key_count;
      this_single_command_key_start = command_key_start;
      if (key_count > 0)
	this_command_keys = keys;

      cancel_echoing ();
      ok_to_echo_at_next_pause = saved_ok_to_echo;
      kset_echo_string (current_kboard, saved_echo_string);
      kset_echo_prompt (current_kboard, saved_echo_prompt);
      if (saved_immediate_echo)
	echo_now ();

      /* The input method can return no events.  */
      if (! CONSP (tem))
	{
	  /* Bring back the previous message, if any.  */
	  if (! NILP (previous_echo_area_message))
	    message_with_string ("%s", previous_echo_area_message, 0);
	  goto retry;
	}
      /* It returned one event or more.  */
      c = XCAR (tem);
      Vunread_post_input_method_events
	= nconc2 (XCDR (tem), Vunread_post_input_method_events);
    }
  /* When we consume events from the various unread-*-events lists, we
     bypass the code that records input, so record these events now if
     they were not recorded already.  */
  if (!recorded)
    {
      record_char (c);
      recorded = true;
    }

 reread_first:

  /* Display help if not echoing.  */
  if (CONSP (c) && EQ (XCAR (c), Qhelp_echo))
    {
      /* (help-echo FRAME HELP WINDOW OBJECT POS).  */
      Lisp_Object help, object, position, window, htem;

      htem = Fcdr (XCDR (c));
      help = Fcar (htem);
      htem = Fcdr (htem);
      window = Fcar (htem);
      htem = Fcdr (htem);
      object = Fcar (htem);
      htem = Fcdr (htem);
      position = Fcar (htem);

      show_help_echo (help, window, object, position);

      /* We stopped being idle for this event; undo that.  */
      if (!end_time)
	timer_resume_idle ();
      goto retry;
    }

  if ((! reread || this_command_key_count == 0)
      && !end_time)
    {

      /* Don't echo mouse motion events.  */
      if (! (EVENT_HAS_PARAMETERS (c)
	     && EQ (EVENT_HEAD_KIND (EVENT_HEAD (c)), Qmouse_movement)))
	/* Once we reread a character, echoing can happen
	   the next time we pause to read a new one.  */
	ok_to_echo_at_next_pause = current_kboard;

      /* Record this character as part of the current key.  */
      add_command_key (c);
      if (! NILP (also_record))
	add_command_key (also_record);

      echo_update ();
    }

  last_input_event = c;
  num_input_events++;

  /* Process the help character specially if enabled.  */
  if (!NILP (Vhelp_form) && help_char_p (c))
    {
      ptrdiff_t count = SPECPDL_INDEX ();

      help_form_saved_window_configs
	= Fcons (Fcurrent_window_configuration (Qnil),
		 help_form_saved_window_configs);
      record_unwind_protect_void (read_char_help_form_unwind);
      call0 (Qhelp_form_show);

      cancel_echoing ();
      do
	{
	  c = read_char (0, Qnil, Qnil, 0, NULL);
	  if (EVENT_HAS_PARAMETERS (c)
	      && EQ (EVENT_HEAD_KIND (EVENT_HEAD (c)), Qmouse_click))
	    XSETCAR (help_form_saved_window_configs, Qnil);
	}
      while (BUFFERP (c));
      /* Remove the help from the frame.  */
      unbind_to (count, Qnil);

      redisplay ();
      if (EQ (c, make_fixnum (040)))
	{
	  cancel_echoing ();
	  do
	    c = read_char (0, Qnil, Qnil, 0, NULL);
	  while (BUFFERP (c));
	}
    }

 exit:
  RESUME_POLLING;
  input_was_pending = input_pending;
  return c;
}

/* Record a key that came from a mouse menu.
   Record it for echoing, for this-command-keys, and so on.  */

static void
record_menu_key (Lisp_Object c)
{
  /* Wipe the echo area.  */
  clear_message (1, 0);

  record_char (c);

  /* Once we reread a character, echoing can happen
     the next time we pause to read a new one.  */
  ok_to_echo_at_next_pause = NULL;

  /* Record this character as part of the current key.  */
  add_command_key (c);
  echo_update ();

  /* Re-reading in the middle of a command.  */
  last_input_event = c;
  num_input_events++;
}

/* Return true if should recognize C as "the help character".  */

static bool
help_char_p (Lisp_Object c)
{
  if (EQ (c, Vhelp_char))
    return true;
  Lisp_Object tail = Vhelp_event_list;
  FOR_EACH_TAIL_SAFE (tail)
    if (EQ (c, XCAR (tail)))
      return true;
  return false;
}

/* Record the input event C in various ways.  */

static void
record_char (Lisp_Object c)
{
  int recorded = 0;

  if (CONSP (c) && (EQ (XCAR (c), Qhelp_echo) || EQ (XCAR (c), Qmouse_movement)))
    {
      /* To avoid filling recent_keys with help-echo and mouse-movement
	 events, we filter out repeated help-echo events, only store the
	 first and last in a series of mouse-movement events, and don't
	 store repeated help-echo events which are only separated by
	 mouse-movement events.  */

      Lisp_Object ev1, ev2, ev3;
      int ix1, ix2, ix3;

      if ((ix1 = recent_keys_index - 1) < 0)
	ix1 = lossage_limit - 1;
      ev1 = AREF (recent_keys, ix1);

      if ((ix2 = ix1 - 1) < 0)
	ix2 = lossage_limit - 1;
      ev2 = AREF (recent_keys, ix2);

      if ((ix3 = ix2 - 1) < 0)
	ix3 = lossage_limit - 1;
      ev3 = AREF (recent_keys, ix3);

      if (EQ (XCAR (c), Qhelp_echo))
	{
	  /* Don't record `help-echo' in recent_keys unless it shows some help
	     message, and a different help than the previously recorded
	     event.  */
	  Lisp_Object help, last_help;

	  help = Fcar_safe (Fcdr_safe (XCDR (c)));
	  if (!STRINGP (help))
	    recorded = 1;
	  else if (CONSP (ev1) && EQ (XCAR (ev1), Qhelp_echo)
		   && (last_help = Fcar_safe (Fcdr_safe (XCDR (ev1))), EQ (last_help, help)))
	    recorded = 1;
	  else if (CONSP (ev1) && EQ (XCAR (ev1), Qmouse_movement)
		   && CONSP (ev2) && EQ (XCAR (ev2), Qhelp_echo)
		   && (last_help = Fcar_safe (Fcdr_safe (XCDR (ev2))), EQ (last_help, help)))
	    recorded = -1;
	  else if (CONSP (ev1) && EQ (XCAR (ev1), Qmouse_movement)
		   && CONSP (ev2) && EQ (XCAR (ev2), Qmouse_movement)
		   && CONSP (ev3) && EQ (XCAR (ev3), Qhelp_echo)
		   && (last_help = Fcar_safe (Fcdr_safe (XCDR (ev3))), EQ (last_help, help)))
	    recorded = -2;
	}
      else if (EQ (XCAR (c), Qmouse_movement))
	{
	  /* Only record one pair of `mouse-movement' on a window in recent_keys.
	     So additional mouse movement events replace the last element.  */
	  Lisp_Object last_window, window;

	  window = Fcar_safe (Fcar_safe (XCDR (c)));
	  if (CONSP (ev1) && EQ (XCAR (ev1), Qmouse_movement)
	      && (last_window = Fcar_safe (Fcar_safe (XCDR (ev1))), EQ (last_window, window))
	      && CONSP (ev2) && EQ (XCAR (ev2), Qmouse_movement)
	      && (last_window = Fcar_safe (Fcar_safe (XCDR (ev2))), EQ (last_window, window)))
	    {
	      ASET (recent_keys, ix1, c);
	      recorded = 1;
	    }
	}
    }
  else if (NILP (Vexecuting_kbd_macro))
    store_kbd_macro_char (c);

  /* recent_keys should not include events from keyboard macros.  */
  if (NILP (Vexecuting_kbd_macro))
    {
      if (!recorded)
	{
	  total_keys += total_keys < lossage_limit;
	  ASET (recent_keys, recent_keys_index,
                /* Copy the event, in case it gets modified by side-effect
                   by some remapping function (bug#30955).  */
                CONSP (c) ? Fcopy_sequence (c) : c);
	  if (++recent_keys_index >= lossage_limit)
	    recent_keys_index = 0;
	}
      else if (recorded < 0)
	{
	  /* We need to remove one or two events from recent_keys.
	     To do this, we simply put nil at those events and move the
	     recent_keys_index backwards over those events.  Usually,
	     users will never see those nil events, as they will be
	     overwritten by the command keys entered to see recent_keys
	     (e.g. C-h l).  */

	  while (recorded++ < 0 && total_keys > 0)
	    {
	      if (total_keys < lossage_limit)
		total_keys--;
	      if (--recent_keys_index < 0)
		recent_keys_index = lossage_limit - 1;
	      ASET (recent_keys, recent_keys_index, Qnil);
	    }
	}

      num_nonmacro_input_events++;
    }

  /* Write c to the dribble file.  If c is a lispy event, write
     the event's symbol to the dribble file, in <brackets>.  Bleaugh.
     If you, dear reader, have a better idea, you've got the source.  :-) */
  if (dribble && NILP (Vexecuting_kbd_macro))
    {
      block_input ();
      if (FIXNUMP (c))
	{
	  if (XUFIXNUM (c) < 0x100)
	    putc (XUFIXNUM (c), dribble);
	  else
	    fprintf (dribble, " 0x%"pI"x", XUFIXNUM (c));
	}
      else
	{
	  Lisp_Object dribblee;

	  /* If it's a structured event, take the event header.  */
	  dribblee = EVENT_HEAD (c);

	  if (SYMBOLP (dribblee))
	    {
	      putc ('<', dribble);
	      fwrite (SDATA (SYMBOL_NAME (dribblee)), sizeof (char),
		      SBYTES (SYMBOL_NAME (dribblee)), dribble);
	      putc ('>', dribble);
	    }
	}

      fflush (dribble);
      unblock_input ();
    }
}

/* Copy out or in the info on where C-g should throw to.
   This is used when running Lisp code from within get_char,
   in case get_char is called recursively.
   See read_process_output.  */

static void
save_getcjmp (sys_jmp_buf temp)
{
  memcpy (temp, getcjmp, sizeof getcjmp);
}

static void
restore_getcjmp (void *temp)
{
  memcpy (getcjmp, temp, sizeof getcjmp);
}
\f
/* Low level keyboard/mouse input.
   kbd_buffer_store_event places events in kbd_buffer, and
   kbd_buffer_get_event retrieves them.  */

/* Return true if there are any events in the queue that read-char
   would return.  If this returns false, a read-char would block.  */
static bool
readable_events (int flags)
{
  if (flags & READABLE_EVENTS_DO_TIMERS_NOW)
    timer_check ();

  /* If the buffer contains only FOCUS_IN/OUT_EVENT events, and
     READABLE_EVENTS_FILTER_EVENTS is set, report it as empty.  */
  if (kbd_fetch_ptr != kbd_store_ptr)
    {
      if (flags & (READABLE_EVENTS_FILTER_EVENTS
#ifdef USE_TOOLKIT_SCROLL_BARS
		   | READABLE_EVENTS_IGNORE_SQUEEZABLES
#endif
		   ))
        {
          union buffered_input_event *event = kbd_fetch_ptr;

	  do
	    {
	      if (!(
#ifdef USE_TOOLKIT_SCROLL_BARS
		    (flags & READABLE_EVENTS_FILTER_EVENTS) &&
#endif
		    (event->kind == FOCUS_IN_EVENT
                     || event->kind == FOCUS_OUT_EVENT))
#ifdef USE_TOOLKIT_SCROLL_BARS
		  && !((flags & READABLE_EVENTS_IGNORE_SQUEEZABLES)
		       && (event->kind == SCROLL_BAR_CLICK_EVENT
			   || event->kind == HORIZONTAL_SCROLL_BAR_CLICK_EVENT)
		       && event->ie.part == scroll_bar_handle
		       && event->ie.modifiers == 0)
#endif
		 )
		return 1;
	      event = next_kbd_event (event);
	    }
	  while (event != kbd_store_ptr);
        }
      else
	return 1;
    }

  if (!(flags & READABLE_EVENTS_IGNORE_SQUEEZABLES) && some_mouse_moved ())
    return 1;
  if (single_kboard)
    {
      if (current_kboard->kbd_queue_has_data)
	return 1;
    }
  else
    {
      KBOARD *kb;
      for (kb = all_kboards; kb; kb = kb->next_kboard)
	if (kb->kbd_queue_has_data)
	  return 1;
    }
  return 0;
}

/* Set this for debugging, to have a way to get out */
int stop_character EXTERNALLY_VISIBLE;

static KBOARD *
event_to_kboard (struct input_event *event)
{
  /* Not applicable for these special events.  */
  if (event->kind == SELECTION_REQUEST_EVENT
      || event->kind == SELECTION_CLEAR_EVENT)
    return NULL;
  else
    {
      Lisp_Object obj = event->frame_or_window;
      /* There are some events that set this field to nil or string.  */
      if (WINDOWP (obj))
	obj = WINDOW_FRAME (XWINDOW (obj));
      /* Also ignore dead frames here.  */
      return ((FRAMEP (obj) && FRAME_LIVE_P (XFRAME (obj)))
	      ? FRAME_KBOARD (XFRAME (obj)) : NULL);
    }
}

#ifdef subprocesses
/* Return the number of slots occupied in kbd_buffer.  */

static int
kbd_buffer_nr_stored (void)
{
  int n = kbd_store_ptr - kbd_fetch_ptr;
  return n + (n < 0 ? KBD_BUFFER_SIZE : 0);
}
#endif	/* Store an event obtained at interrupt level into kbd_buffer, fifo */

void
kbd_buffer_store_event (register struct input_event *event)
{
  kbd_buffer_store_event_hold (event, 0);
}

/* Store EVENT obtained at interrupt level into kbd_buffer, fifo.

   If HOLD_QUIT is 0, just stuff EVENT into the fifo.
   Else, if HOLD_QUIT.kind != NO_EVENT, discard EVENT.
   Else, if EVENT is a quit event, store the quit event
   in HOLD_QUIT, and return (thus ignoring further events).

   This is used to postpone the processing of the quit event until all
   subsequent input events have been parsed (and discarded).  */

void
kbd_buffer_store_buffered_event (union buffered_input_event *event,
				 struct input_event *hold_quit)
{
  if (event->kind == NO_EVENT)
    emacs_abort ();

  if (hold_quit && hold_quit->kind != NO_EVENT)
    return;

  if (event->kind == ASCII_KEYSTROKE_EVENT)
    {
      int c = event->ie.code & 0377;

      if (event->ie.modifiers & ctrl_modifier)
	c = make_ctrl_char (c);

      c |= (event->ie.modifiers
	    & (meta_modifier | alt_modifier
	       | hyper_modifier | super_modifier));

      if (c == quit_char)
	{
	  KBOARD *kb = FRAME_KBOARD (XFRAME (event->ie.frame_or_window));

	  if (single_kboard && kb != current_kboard)
	    {
	      kset_kbd_queue
		(kb, list2 (make_lispy_switch_frame (event->ie.frame_or_window),
			    make_fixnum (c)));
	      kb->kbd_queue_has_data = true;

	      for (union buffered_input_event *sp = kbd_fetch_ptr;
		   sp != kbd_store_ptr; sp = next_kbd_event (sp))
		{
		  if (event_to_kboard (&sp->ie) == kb)
		    {
		      sp->ie.kind = NO_EVENT;
		      sp->ie.frame_or_window = Qnil;
		      sp->ie.arg = Qnil;
		    }
		}
	      return;
	    }

	  if (hold_quit)
	    {
	      *hold_quit = event->ie;
	      return;
	    }

	  /* If this results in a quit_char being returned to Emacs as
	     input, set Vlast_event_frame properly.  If this doesn't
	     get returned to Emacs as an event, the next event read
	     will set Vlast_event_frame again, so this is safe to do.  */
	  {
	    Lisp_Object focus;

	    focus = FRAME_FOCUS_FRAME (XFRAME (event->ie.frame_or_window));
	    if (NILP (focus))
	      focus = event->ie.frame_or_window;
	    internal_last_event_frame = focus;
	    Vlast_event_frame = focus;
	  }

	  handle_interrupt (0);
	  return;
	}

      if (c && c == stop_character)
	{
	  sys_suspend ();
	  return;
	}
    }

  /* Don't let the very last slot in the buffer become full,
     since that would make the two pointers equal,
     and that is indistinguishable from an empty buffer.
     Discard the event if it would fill the last slot.  */
  union buffered_input_event *next_slot = next_kbd_event (kbd_store_ptr);
  if (kbd_fetch_ptr != next_slot)
    {
      *kbd_store_ptr = *event;
      kbd_store_ptr = next_slot;
#ifdef subprocesses
      if (kbd_buffer_nr_stored () > KBD_BUFFER_SIZE / 2
	  && ! kbd_on_hold_p ())
        {
          /* Don't read keyboard input until we have processed kbd_buffer.
             This happens when pasting text longer than KBD_BUFFER_SIZE/2.  */
          hold_keyboard_input ();
          unrequest_sigio ();
          stop_polling ();
        }
#endif	/* subprocesses */
    }

  Lisp_Object ignore_event;

  switch (event->kind)
    {
    case FOCUS_IN_EVENT: ignore_event = Qfocus_in; break;
    case FOCUS_OUT_EVENT: ignore_event = Qfocus_out; break;
    case HELP_EVENT: ignore_event = Qhelp_echo; break;
    case ICONIFY_EVENT: ignore_event = Qiconify_frame; break;
    case DEICONIFY_EVENT: ignore_event = Qmake_frame_visible; break;
    case SELECTION_REQUEST_EVENT: ignore_event = Qselection_request; break;
#ifdef USE_FILE_NOTIFY
    case FILE_NOTIFY_EVENT: ignore_event = Qfile_notify; break;
#endif
#ifdef HAVE_DBUS
    case DBUS_EVENT: ignore_event = Qdbus_event; break;
#endif
    default: ignore_event = Qnil; break;
    }

  /* If we're inside while-no-input, and this event qualifies
     as input, set quit-flag to cause an interrupt.  */
  if (!NILP (Vthrow_on_input)
      && NILP (Fmemq (ignore_event, Vwhile_no_input_ignore_events)))
    Vquit_flag = Vthrow_on_input;
}


#ifdef HAVE_X11

/* Put a selection input event back in the head of the event queue.  */

void
kbd_buffer_unget_event (struct selection_input_event *event)
{
  /* Don't let the very last slot in the buffer become full,  */
  union buffered_input_event *kp = prev_kbd_event (kbd_fetch_ptr);
  if (kp != kbd_store_ptr)
    {
      kp->sie = *event;
      kbd_fetch_ptr = kp;
    }
}

#endif

/* Limit help event positions to this range, to avoid overflow problems.  */
#define INPUT_EVENT_POS_MAX \
  ((ptrdiff_t) min (PTRDIFF_MAX, min (TYPE_MAXIMUM (Time) / 2, \
				      MOST_POSITIVE_FIXNUM)))
#define INPUT_EVENT_POS_MIN (PTRDIFF_MIN < -INPUT_EVENT_POS_MAX \
			     ? -1 - INPUT_EVENT_POS_MAX : PTRDIFF_MIN)

/* Return a Time that encodes position POS.  POS must be in range.  */

static Time
position_to_Time (ptrdiff_t pos)
{
  eassert (INPUT_EVENT_POS_MIN <= pos && pos <= INPUT_EVENT_POS_MAX);
  return pos;
}

/* Return the position that ENCODED_POS encodes.
   Avoid signed integer overflow.  */

static ptrdiff_t
Time_to_position (Time encoded_pos)
{
  if (encoded_pos <= INPUT_EVENT_POS_MAX)
    return encoded_pos;
  Time encoded_pos_min = INPUT_EVENT_POS_MIN;
  eassert (encoded_pos_min <= encoded_pos);
  ptrdiff_t notpos = -1 - encoded_pos;
  return -1 - notpos;
}

/* Generate a HELP_EVENT input_event and store it in the keyboard
   buffer.

   HELP is the help form.

   FRAME and WINDOW are the frame and window where the help is
   generated.  OBJECT is the Lisp object where the help was found (a
   buffer, a string, an overlay, or nil if neither from a string nor
   from a buffer).  POS is the position within OBJECT where the help
   was found.  */

void
gen_help_event (Lisp_Object help, Lisp_Object frame, Lisp_Object window,
		Lisp_Object object, ptrdiff_t pos)
{
  struct input_event event;

  event.kind = HELP_EVENT;
  event.frame_or_window = frame;
  event.arg = object;
  event.x = WINDOWP (window) ? window : frame;
  event.y = help;
  event.timestamp = position_to_Time (pos);
  kbd_buffer_store_event (&event);
}


/* Store HELP_EVENTs for HELP on FRAME in the input queue.  */

void
kbd_buffer_store_help_event (Lisp_Object frame, Lisp_Object help)
{
  struct input_event event;

  event.kind = HELP_EVENT;
  event.frame_or_window = frame;
  event.arg = Qnil;
  event.x = Qnil;
  event.y = help;
  event.timestamp = 0;
  kbd_buffer_store_event (&event);
}

\f
/* Discard any mouse events in the event buffer by setting them to
   NO_EVENT.  */
void
discard_mouse_events (void)
{
  for (union buffered_input_event *sp = kbd_fetch_ptr;
       sp != kbd_store_ptr; sp = next_kbd_event (sp))
    {
      if (sp->kind == MOUSE_CLICK_EVENT
	  || sp->kind == WHEEL_EVENT
          || sp->kind == HORIZ_WHEEL_EVENT
	  || sp->kind == SCROLL_BAR_CLICK_EVENT
	  || sp->kind == HORIZONTAL_SCROLL_BAR_CLICK_EVENT)
	{
	  sp->kind = NO_EVENT;
	}
    }
}


/* Return true if there are any real events waiting in the event
   buffer, not counting `NO_EVENT's.

   Discard NO_EVENT events at the front of the input queue, possibly
   leaving the input queue empty if there are no real input events.  */

bool
kbd_buffer_events_waiting (void)
{
  for (union buffered_input_event *sp = kbd_fetch_ptr;
       ; sp = next_kbd_event (sp))
    if (sp == kbd_store_ptr || sp->kind != NO_EVENT)
      {
	kbd_fetch_ptr = sp;
	return sp != kbd_store_ptr && sp->kind != NO_EVENT;
      }
}

\f
/* Clear input event EVENT.  */

static void
clear_event (struct input_event *event)
{
  event->kind = NO_EVENT;
}


/* Read one event from the event buffer, waiting if necessary.
   The value is a Lisp object representing the event.
   The value is nil for an event that should be ignored,
   or that was handled here.
   We always read and discard one event.  */

static Lisp_Object
kbd_buffer_get_event (KBOARD **kbp,
                      bool *used_mouse_menu,
                      struct timespec *end_time)
{
  Lisp_Object obj;

#ifdef subprocesses
  if (kbd_on_hold_p () && kbd_buffer_nr_stored () < KBD_BUFFER_SIZE / 4)
    {
      /* Start reading input again because we have processed enough to
         be able to accept new events again.  */
      unhold_keyboard_input ();
      request_sigio ();
      start_polling ();
    }
#endif	/* subprocesses */

#if !defined HAVE_DBUS && !defined USE_FILE_NOTIFY && !defined THREADS_ENABLED
  if (noninteractive
      /* In case we are running as a daemon, only do this before
	 detaching from the terminal.  */
      || (IS_DAEMON && DAEMON_RUNNING))
    {
      int c = getchar ();
      XSETINT (obj, c);
      *kbp = current_kboard;
      return obj;
    }
#endif	/* !defined HAVE_DBUS && !defined USE_FILE_NOTIFY && !defined THREADS_ENABLED  */

  /* Wait until there is input available.  */
  for (;;)
    {
      /* Break loop if there's an unread command event.  Needed in
	 moused window autoselection which uses a timer to insert such
	 events.  */
      if (CONSP (Vunread_command_events))
	break;

      if (kbd_fetch_ptr != kbd_store_ptr)
	break;
      if (some_mouse_moved ())
	break;

      /* If the quit flag is set, then read_char will return
	 quit_char, so that counts as "available input."  */
      if (!NILP (Vquit_flag))
	quit_throw_to_read_char (0);

      /* One way or another, wait until input is available; then, if
	 interrupt handlers have not read it, read it now.  */

#ifdef USABLE_SIGIO
      gobble_input ();
#endif
      if (kbd_fetch_ptr != kbd_store_ptr)
	break;
      if (some_mouse_moved ())
	break;
      if (end_time)
	{
	  struct timespec now = current_timespec ();
	  if (timespec_cmp (*end_time, now) <= 0)
	    return Qnil;	/* Finished waiting.  */
	  else
	    {
	      struct timespec duration = timespec_sub (*end_time, now);
	      wait_reading_process_output (min (duration.tv_sec,
						WAIT_READING_MAX),
					   duration.tv_nsec,
					   -1, 1, Qnil, NULL, 0);
	    }
	}
      else
	{
	  bool do_display = true;

	  if (FRAME_TERMCAP_P (SELECTED_FRAME ()))
	    {
	      struct tty_display_info *tty = CURTTY ();

	      /* When this TTY is displaying a menu, we must prevent
		 any redisplay, because we modify the frame's glyph
		 matrix behind the back of the display engine.  */
	      if (tty->showing_menu)
		do_display = false;
	    }

	  wait_reading_process_output (0, 0, -1, do_display, Qnil, NULL, 0);
	}

      if (!interrupt_input && kbd_fetch_ptr == kbd_store_ptr)
	gobble_input ();
    }

  if (CONSP (Vunread_command_events))
    {
      Lisp_Object first;
      first = XCAR (Vunread_command_events);
      Vunread_command_events = XCDR (Vunread_command_events);
      *kbp = current_kboard;
      return first;
    }

  /* At this point, we know that there is a readable event available
     somewhere.  If the event queue is empty, then there must be a
     mouse movement enabled and available.  */
  if (kbd_fetch_ptr != kbd_store_ptr)
    {
      union buffered_input_event *event = kbd_fetch_ptr;

      *kbp = event_to_kboard (&event->ie);
      if (*kbp == 0)
	*kbp = current_kboard;  /* Better than returning null ptr?  */

      obj = Qnil;

      /* These two kinds of events get special handling
	 and don't actually appear to the command loop.
	 We return nil for them.  */
      switch (event->kind)
      {
      case SELECTION_REQUEST_EVENT:
      case SELECTION_CLEAR_EVENT:
	{
#ifdef HAVE_X11
	  /* Remove it from the buffer before processing it,
	     since otherwise swallow_events will see it
	     and process it again.  */
	  struct selection_input_event copy = event->sie;
	  kbd_fetch_ptr = next_kbd_event (event);
	  input_pending = readable_events (0);
	  x_handle_selection_event (&copy);
#else
	  /* We're getting selection request events, but we don't have
             a window system.  */
	  emacs_abort ();
#endif
	}
        break;

#ifdef HAVE_EXT_MENU_BAR
      case MENU_BAR_ACTIVATE_EVENT:
	{
          struct frame *f;
	  kbd_fetch_ptr = next_kbd_event (event);
	  input_pending = readable_events (0);
          f = (XFRAME (event->ie.frame_or_window));
	  if (FRAME_LIVE_P (f) && FRAME_TERMINAL (f)->activate_menubar_hook)
	    FRAME_TERMINAL (f)->activate_menubar_hook (f);
	}
        break;
#endif
#if defined (HAVE_NS)
      case NS_TEXT_EVENT:
	if (used_mouse_menu)
	  *used_mouse_menu = true;
	FALLTHROUGH;
#endif
#ifdef HAVE_NTGUI
      case END_SESSION_EVENT:
      case LANGUAGE_CHANGE_EVENT:
#endif
#ifdef HAVE_WINDOW_SYSTEM
      case DELETE_WINDOW_EVENT:
      case ICONIFY_EVENT:
      case DEICONIFY_EVENT:
      case MOVE_FRAME_EVENT:
#endif
#ifdef USE_FILE_NOTIFY
      case FILE_NOTIFY_EVENT:
#endif
#ifdef HAVE_DBUS
      case DBUS_EVENT:
#endif
#ifdef THREADS_ENABLED
      case THREAD_EVENT:
#endif
#ifdef HAVE_XWIDGETS
      case XWIDGET_EVENT:
#endif
      case SAVE_SESSION_EVENT:
      case NO_EVENT:
      case HELP_EVENT:
      case FOCUS_IN_EVENT:
      case CONFIG_CHANGED_EVENT:
      case FOCUS_OUT_EVENT:
      case SELECT_WINDOW_EVENT:
        {
          obj = make_lispy_event (&event->ie);
          kbd_fetch_ptr = next_kbd_event (event);
        }
        break;
      default:
	{
	  /* If this event is on a different frame, return a
	     switch-frame this time, and leave the event in the queue
	     for next time.  */
	  Lisp_Object frame;
	  Lisp_Object focus;

	  frame = event->ie.frame_or_window;
	  if (CONSP (frame))
	    frame = XCAR (frame);
	  else if (WINDOWP (frame))
	    frame = WINDOW_FRAME (XWINDOW (frame));

	  focus = FRAME_FOCUS_FRAME (XFRAME (frame));
	  if (! NILP (focus))
	    frame = focus;

	  if (!EQ (frame, internal_last_event_frame)
	      && !EQ (frame, selected_frame))
	    obj = make_lispy_switch_frame (frame);
	  internal_last_event_frame = frame;

	  /* If we didn't decide to make a switch-frame event, go ahead
	     and build a real event from the queue entry.  */
	  if (NILP (obj))
	    {
	      obj = make_lispy_event (&event->ie);

#ifdef HAVE_EXT_MENU_BAR
	      /* If this was a menu selection, then set the flag to inhibit
		 writing to last_nonmenu_event.  Don't do this if the event
		 we're returning is (menu-bar), though; that indicates the
		 beginning of the menu sequence, and we might as well leave
		 that as the `event with parameters' for this selection.  */
	      if (used_mouse_menu
		  && !EQ (event->ie.frame_or_window, event->ie.arg)
		  && (event->kind == MENU_BAR_EVENT
		      || event->kind == TAB_BAR_EVENT
		      || event->kind == TOOL_BAR_EVENT))
		*used_mouse_menu = true;
#endif
#ifdef HAVE_NS
	      /* Certain system events are non-key events.  */
	      if (used_mouse_menu
                  && event->kind == NS_NONKEY_EVENT)
		*used_mouse_menu = true;
#endif

	      /* Wipe out this event, to catch bugs.  */
	      clear_event (&event->ie);
	      kbd_fetch_ptr = next_kbd_event (event);
	    }
	}
      }
    }
  /* Try generating a mouse motion event.  */
  else if (some_mouse_moved ())
    {
      struct frame *f = some_mouse_moved ();
      Lisp_Object bar_window;
      enum scroll_bar_part part;
      Lisp_Object x, y;
      Time t;

      *kbp = current_kboard;
      /* Note that this uses F to determine which terminal to look at.
	 If there is no valid info, it does not store anything
	 so x remains nil.  */
      x = Qnil;

      /* XXX Can f or mouse_position_hook be NULL here?  */
      if (f && FRAME_TERMINAL (f)->mouse_position_hook)
        (*FRAME_TERMINAL (f)->mouse_position_hook) (&f, 0, &bar_window,
                                                    &part, &x, &y, &t);

      obj = Qnil;

      /* Decide if we should generate a switch-frame event.  Don't
	 generate switch-frame events for motion outside of all Emacs
	 frames.  */
      if (!NILP (x) && f)
	{
	  Lisp_Object frame;

	  frame = FRAME_FOCUS_FRAME (f);
	  if (NILP (frame))
	    XSETFRAME (frame, f);

	  if (!EQ (frame, internal_last_event_frame)
	      && !EQ (frame, selected_frame))
	    obj = make_lispy_switch_frame (frame);
	  internal_last_event_frame = frame;
	}

      /* If we didn't decide to make a switch-frame event, go ahead and
	 return a mouse-motion event.  */
      if (!NILP (x) && NILP (obj))
	obj = make_lispy_movement (f, bar_window, part, x, y, t);
    }
  else
    /* We were promised by the above while loop that there was
       something for us to read!  */
    emacs_abort ();

  input_pending = readable_events (0);

  Vlast_event_frame = internal_last_event_frame;

  return (obj);
}
\f
/* Process any non-user-visible events (currently X selection events),
   without reading any user-visible events.  */

static void
process_special_events (void)
{
  for (union buffered_input_event *event = kbd_fetch_ptr;
       event != kbd_store_ptr; event = next_kbd_event (event))
    {
      /* If we find a stored X selection request, handle it now.  */
      if (event->kind == SELECTION_REQUEST_EVENT
	  || event->kind == SELECTION_CLEAR_EVENT)
	{
#ifdef HAVE_X11

	  /* Remove the event from the fifo buffer before processing;
	     otherwise swallow_events called recursively could see it
	     and process it again.  To do this, we move the events
	     between kbd_fetch_ptr and EVENT one slot to the right,
	     cyclically.  */

	  struct selection_input_event copy = event->sie;
	  int moved_events;

	  if (event < kbd_fetch_ptr)
	    {
	      memmove (kbd_buffer + 1, kbd_buffer,
		       (event - kbd_buffer) * sizeof *kbd_buffer);
	      kbd_buffer[0] = kbd_buffer[KBD_BUFFER_SIZE - 1];
	      moved_events = kbd_buffer + KBD_BUFFER_SIZE - 1 - kbd_fetch_ptr;
	    }
	  else
	    moved_events = event - kbd_fetch_ptr;

	  memmove (kbd_fetch_ptr + 1, kbd_fetch_ptr,
		   moved_events * sizeof *kbd_fetch_ptr);
	  kbd_fetch_ptr = next_kbd_event (kbd_fetch_ptr);
	  input_pending = readable_events (0);
	  x_handle_selection_event (&copy);
#else
	  /* We're getting selection request events, but we don't have
             a window system.  */
	  emacs_abort ();
#endif
	}
    }
}

/* Process any events that are not user-visible, run timer events that
   are ripe, and return, without reading any user-visible events.  */

void
swallow_events (bool do_display)
{
  unsigned old_timers_run;

  process_special_events ();

  old_timers_run = timers_run;
  get_input_pending (READABLE_EVENTS_DO_TIMERS_NOW);

  if (!input_pending && timers_run != old_timers_run && do_display)
    redisplay_preserve_echo_area (7);
}
\f
/* Record the start of when Emacs is idle,
   for the sake of running idle-time timers.  */

static void
timer_start_idle (void)
{
  /* If we are already in the idle state, do nothing.  */
  if (timespec_valid_p (timer_idleness_start_time))
    return;

  timer_idleness_start_time = current_timespec ();
  timer_last_idleness_start_time = timer_idleness_start_time;

  /* Mark all idle-time timers as once again candidates for running.  */
  call0 (intern ("internal-timer-start-idle"));
}

/* Record that Emacs is no longer idle, so stop running idle-time timers.  */

static void
timer_stop_idle (void)
{
  timer_idleness_start_time = invalid_timespec ();
}

/* Resume idle timer from last idle start time.  */

static void
timer_resume_idle (void)
{
  if (timespec_valid_p (timer_idleness_start_time))
    return;

  timer_idleness_start_time = timer_last_idleness_start_time;
}

/* List of elisp functions to call, delayed because they were generated in
   a context where Elisp could not be safely run (e.g. redisplay, signal,
   ...).  Each element has the form (FUN . ARGS).  */
Lisp_Object pending_funcalls;

/* Return true if TIMER is a valid timer, placing its value into *RESULT.  */
static bool
decode_timer (Lisp_Object timer, struct timespec *result)
{
  Lisp_Object *vec;

  if (! (VECTORP (timer) && ASIZE (timer) == 10))
    return false;
  vec = XVECTOR (timer)->contents;
  if (! NILP (vec[0]))
    return false;
  if (! FIXNUMP (vec[2]))
    return false;
  return list4_to_timespec (vec[1], vec[2], vec[3], vec[8], result);
}


/* Check whether a timer has fired.  To prevent larger problems we simply
   disregard elements that are not proper timers.  Do not make a circular
   timer list for the time being.

   Returns the time to wait until the next timer fires.  If a
   timer is triggering now, return zero.
   If no timer is active, return -1.

   If a timer is ripe, we run it, with quitting turned off.
   In that case we return 0 to indicate that a new timer_check_2 call
   should be done.  */

static struct timespec
timer_check_2 (Lisp_Object timers, Lisp_Object idle_timers)
{
  struct timespec nexttime;
  struct timespec now;
  struct timespec idleness_now;
  Lisp_Object chosen_timer;

  nexttime = invalid_timespec ();

  chosen_timer = Qnil;

  /* First run the code that was delayed.  */
  while (CONSP (pending_funcalls))
    {
      Lisp_Object funcall = XCAR (pending_funcalls);
      pending_funcalls = XCDR (pending_funcalls);
      safe_call2 (Qapply, XCAR (funcall), XCDR (funcall));
    }

  if (CONSP (timers) || CONSP (idle_timers))
    {
      now = current_timespec ();
      idleness_now = (timespec_valid_p (timer_idleness_start_time)
		      ? timespec_sub (now, timer_idleness_start_time)
		      : make_timespec (0, 0));
    }

  while (CONSP (timers) || CONSP (idle_timers))
    {
      Lisp_Object timer = Qnil, idle_timer = Qnil;
      struct timespec timer_time, idle_timer_time;
      struct timespec difference;
      struct timespec timer_difference = invalid_timespec ();
      struct timespec idle_timer_difference = invalid_timespec ();
      bool ripe, timer_ripe = 0, idle_timer_ripe = 0;

      /* Set TIMER and TIMER_DIFFERENCE
	 based on the next ordinary timer.
	 TIMER_DIFFERENCE is the distance in time from NOW to when
	 this timer becomes ripe.
         Skip past invalid timers and timers already handled.  */
      if (CONSP (timers))
	{
	  timer = XCAR (timers);
	  if (! decode_timer (timer, &timer_time))
	    {
	      timers = XCDR (timers);
	      continue;
	    }

	  timer_ripe = timespec_cmp (timer_time, now) <= 0;
	  timer_difference = (timer_ripe
			      ? timespec_sub (now, timer_time)
			      : timespec_sub (timer_time, now));
	}

      /* Likewise for IDLE_TIMER and IDLE_TIMER_DIFFERENCE
	 based on the next idle timer.  */
      if (CONSP (idle_timers))
	{
	  idle_timer = XCAR (idle_timers);
	  if (! decode_timer (idle_timer, &idle_timer_time))
	    {
	      idle_timers = XCDR (idle_timers);
	      continue;
	    }

	  idle_timer_ripe = timespec_cmp (idle_timer_time, idleness_now) <= 0;
	  idle_timer_difference
	    = (idle_timer_ripe
	       ? timespec_sub (idleness_now, idle_timer_time)
	       : timespec_sub (idle_timer_time, idleness_now));
	}

      /* Decide which timer is the next timer,
	 and set CHOSEN_TIMER, DIFFERENCE, and RIPE accordingly.
	 Also step down the list where we found that timer.  */

      if (timespec_valid_p (timer_difference)
	  && (! timespec_valid_p (idle_timer_difference)
	      || idle_timer_ripe < timer_ripe
	      || (idle_timer_ripe == timer_ripe
		  && ((timer_ripe
		       ? timespec_cmp (idle_timer_difference,
				       timer_difference)
		       : timespec_cmp (timer_difference,
				       idle_timer_difference))
		      < 0))))
	{
	  chosen_timer = timer;
	  timers = XCDR (timers);
	  difference = timer_difference;
	  ripe = timer_ripe;
	}
      else
	{
	  chosen_timer = idle_timer;
	  idle_timers = XCDR (idle_timers);
	  difference = idle_timer_difference;
	  ripe = idle_timer_ripe;
	}

      /* If timer is ripe, run it if it hasn't been run.  */
      if (ripe)
	{
	  if (NILP (AREF (chosen_timer, 0)))
	    {
	      ptrdiff_t count = SPECPDL_INDEX ();
	      Lisp_Object old_deactivate_mark = Vdeactivate_mark;

	      /* Mark the timer as triggered to prevent problems if the lisp
		 code fails to reschedule it right.  */
	      ASET (chosen_timer, 0, Qt);

	      specbind (Qinhibit_quit, Qt);

	      call1 (Qtimer_event_handler, chosen_timer);
	      Vdeactivate_mark = old_deactivate_mark;
	      timers_run++;
	      unbind_to (count, Qnil);

	      /* Since we have handled the event,
		 we don't need to tell the caller to wake up and do it.  */
              /* But the caller must still wait for the next timer, so
                 return 0 to indicate that.  */
	    }

	  nexttime = make_timespec (0, 0);
          break;
	}
      else
	/* When we encounter a timer that is still waiting,
	   return the amount of time to wait before it is ripe.  */
	{
	  return difference;
	}
    }

  /* No timers are pending in the future.  */
  /* Return 0 if we generated an event, and -1 if not.  */
  return nexttime;
}


/* Check whether a timer has fired.  To prevent larger problems we simply
   disregard elements that are not proper timers.  Do not make a circular
   timer list for the time being.

   Returns the time to wait until the next timer fires.
   If no timer is active, return an invalid value.

   As long as any timer is ripe, we run it.  */

struct timespec
timer_check (void)
{
  struct timespec nexttime;
  Lisp_Object timers, idle_timers;

  Lisp_Object tem = Vinhibit_quit;
  Vinhibit_quit = Qt;

  /* We use copies of the timers' lists to allow a timer to add itself
     again, without locking up Emacs if the newly added timer is
     already ripe when added.  */

  /* Always consider the ordinary timers.  */
  timers = Fcopy_sequence (Vtimer_list);
  /* Consider the idle timers only if Emacs is idle.  */
  if (timespec_valid_p (timer_idleness_start_time))
    idle_timers = Fcopy_sequence (Vtimer_idle_list);
  else
    idle_timers = Qnil;

  Vinhibit_quit = tem;

  do
    {
      nexttime = timer_check_2 (timers, idle_timers);
    }
  while (nexttime.tv_sec == 0 && nexttime.tv_nsec == 0);

  return nexttime;
}

DEFUN ("current-idle-time", Fcurrent_idle_time, Scurrent_idle_time, 0, 0, 0,
       doc: /* Return the current length of Emacs idleness, or nil.
The value when Emacs is idle is a Lisp timestamp in the style of
`current-time'.

The value when Emacs is not idle is nil.

PSEC is a multiple of the system clock resolution.  */)
  (void)
{
  if (timespec_valid_p (timer_idleness_start_time))
    return make_lisp_time (timespec_sub (current_timespec (),
					 timer_idleness_start_time));

  return Qnil;
}
\f
/* Caches for modify_event_symbol.  */
static Lisp_Object accent_key_syms;
static Lisp_Object func_key_syms;
static Lisp_Object mouse_syms;
static Lisp_Object wheel_syms;
static Lisp_Object drag_n_drop_syms;

/* This is a list of keysym codes for special "accent" characters.
   It parallels lispy_accent_keys.  */

static const int lispy_accent_codes[] =
{
#ifdef XK_dead_circumflex
  XK_dead_circumflex,
#else
  0,
#endif
#ifdef XK_dead_grave
  XK_dead_grave,
#else
  0,
#endif
#ifdef XK_dead_tilde
  XK_dead_tilde,
#else
  0,
#endif
#ifdef XK_dead_diaeresis
  XK_dead_diaeresis,
#else
  0,
#endif
#ifdef XK_dead_macron
  XK_dead_macron,
#else
  0,
#endif
#ifdef XK_dead_degree
  XK_dead_degree,
#else
  0,
#endif
#ifdef XK_dead_acute
  XK_dead_acute,
#else
  0,
#endif
#ifdef XK_dead_cedilla
  XK_dead_cedilla,
#else
  0,
#endif
#ifdef XK_dead_breve
  XK_dead_breve,
#else
  0,
#endif
#ifdef XK_dead_ogonek
  XK_dead_ogonek,
#else
  0,
#endif
#ifdef XK_dead_caron
  XK_dead_caron,
#else
  0,
#endif
#ifdef XK_dead_doubleacute
  XK_dead_doubleacute,
#else
  0,
#endif
#ifdef XK_dead_abovedot
  XK_dead_abovedot,
#else
  0,
#endif
#ifdef XK_dead_abovering
  XK_dead_abovering,
#else
  0,
#endif
#ifdef XK_dead_iota
  XK_dead_iota,
#else
  0,
#endif
#ifdef XK_dead_belowdot
  XK_dead_belowdot,
#else
  0,
#endif
#ifdef XK_dead_voiced_sound
  XK_dead_voiced_sound,
#else
  0,
#endif
#ifdef XK_dead_semivoiced_sound
  XK_dead_semivoiced_sound,
#else
  0,
#endif
#ifdef XK_dead_hook
  XK_dead_hook,
#else
  0,
#endif
#ifdef XK_dead_horn
  XK_dead_horn,
#else
  0,
#endif
};

/* This is a list of Lisp names for special "accent" characters.
   It parallels lispy_accent_codes.  */

static const char *const lispy_accent_keys[] =
{
  "dead-circumflex",
  "dead-grave",
  "dead-tilde",
  "dead-diaeresis",
  "dead-macron",
  "dead-degree",
  "dead-acute",
  "dead-cedilla",
  "dead-breve",
  "dead-ogonek",
  "dead-caron",
  "dead-doubleacute",
  "dead-abovedot",
  "dead-abovering",
  "dead-iota",
  "dead-belowdot",
  "dead-voiced-sound",
  "dead-semivoiced-sound",
  "dead-hook",
  "dead-horn",
};

#ifdef HAVE_NTGUI
#define FUNCTION_KEY_OFFSET 0x0

const char *const lispy_function_keys[] =
  {
    0,                /* 0                      */

    0,                /* VK_LBUTTON        0x01 */
    0,                /* VK_RBUTTON        0x02 */
    "cancel",         /* VK_CANCEL         0x03 */
    0,                /* VK_MBUTTON        0x04 */

    0, 0, 0,          /*    0x05 .. 0x07        */

    "backspace",      /* VK_BACK           0x08 */
    "tab",            /* VK_TAB            0x09 */

    0, 0,             /*    0x0A .. 0x0B        */

    "clear",          /* VK_CLEAR          0x0C */
    "return",         /* VK_RETURN         0x0D */

    0, 0,             /*    0x0E .. 0x0F        */

    0,                /* VK_SHIFT          0x10 */
    0,                /* VK_CONTROL        0x11 */
    0,                /* VK_MENU           0x12 */
    "pause",          /* VK_PAUSE          0x13 */
    "capslock",       /* VK_CAPITAL        0x14 */
    "kana",           /* VK_KANA/VK_HANGUL 0x15 */
    0,                /*    0x16                */
    "junja",          /* VK_JUNJA          0x17 */
    "final",          /* VK_FINAL          0x18 */
    "kanji",          /* VK_KANJI/VK_HANJA 0x19 */
    0,                /*    0x1A                */
    "escape",         /* VK_ESCAPE         0x1B */
    "convert",        /* VK_CONVERT        0x1C */
    "non-convert",    /* VK_NONCONVERT     0x1D */
    "accept",         /* VK_ACCEPT         0x1E */
    "mode-change",    /* VK_MODECHANGE     0x1F */
    0,                /* VK_SPACE          0x20 */
    "prior",          /* VK_PRIOR          0x21 */
    "next",           /* VK_NEXT           0x22 */
    "end",            /* VK_END            0x23 */
    "home",           /* VK_HOME           0x24 */
    "left",           /* VK_LEFT           0x25 */
    "up",             /* VK_UP             0x26 */
    "right",          /* VK_RIGHT          0x27 */
    "down",           /* VK_DOWN           0x28 */
    "select",         /* VK_SELECT         0x29 */
    "print",          /* VK_PRINT          0x2A */
    "execute",        /* VK_EXECUTE        0x2B */
    "snapshot",       /* VK_SNAPSHOT       0x2C */
    "insert",         /* VK_INSERT         0x2D */
    "delete",         /* VK_DELETE         0x2E */
    "help",           /* VK_HELP           0x2F */

    /* VK_0 thru VK_9 are the same as ASCII '0' thru '9' (0x30 - 0x39) */

    0, 0, 0, 0, 0, 0, 0, 0, 0, 0,

    0, 0, 0, 0, 0, 0, 0, /* 0x3A .. 0x40       */

    /* VK_A thru VK_Z are the same as ASCII 'A' thru 'Z' (0x41 - 0x5A) */

    0, 0, 0, 0, 0, 0, 0, 0, 0,
    0, 0, 0, 0, 0, 0, 0, 0, 0,
    0, 0, 0, 0, 0, 0, 0, 0,

    "lwindow",       /* VK_LWIN           0x5B */
    "rwindow",       /* VK_RWIN           0x5C */
    "apps",          /* VK_APPS           0x5D */
    0,               /*    0x5E                */
    "sleep",
    "kp-0",          /* VK_NUMPAD0        0x60 */
    "kp-1",          /* VK_NUMPAD1        0x61 */
    "kp-2",          /* VK_NUMPAD2        0x62 */
    "kp-3",          /* VK_NUMPAD3        0x63 */
    "kp-4",          /* VK_NUMPAD4        0x64 */
    "kp-5",          /* VK_NUMPAD5        0x65 */
    "kp-6",          /* VK_NUMPAD6        0x66 */
    "kp-7",          /* VK_NUMPAD7        0x67 */
    "kp-8",          /* VK_NUMPAD8        0x68 */
    "kp-9",          /* VK_NUMPAD9        0x69 */
    "kp-multiply",   /* VK_MULTIPLY       0x6A */
    "kp-add",        /* VK_ADD            0x6B */
    "kp-separator",  /* VK_SEPARATOR      0x6C */
    "kp-subtract",   /* VK_SUBTRACT       0x6D */
    "kp-decimal",    /* VK_DECIMAL        0x6E */
    "kp-divide",     /* VK_DIVIDE         0x6F */
    "f1",            /* VK_F1             0x70 */
    "f2",            /* VK_F2             0x71 */
    "f3",            /* VK_F3             0x72 */
    "f4",            /* VK_F4             0x73 */
    "f5",            /* VK_F5             0x74 */
    "f6",            /* VK_F6             0x75 */
    "f7",            /* VK_F7             0x76 */
    "f8",            /* VK_F8             0x77 */
    "f9",            /* VK_F9             0x78 */
    "f10",           /* VK_F10            0x79 */
    "f11",           /* VK_F11            0x7A */
    "f12",           /* VK_F12            0x7B */
    "f13",           /* VK_F13            0x7C */
    "f14",           /* VK_F14            0x7D */
    "f15",           /* VK_F15            0x7E */
    "f16",           /* VK_F16            0x7F */
    "f17",           /* VK_F17            0x80 */
    "f18",           /* VK_F18            0x81 */
    "f19",           /* VK_F19            0x82 */
    "f20",           /* VK_F20            0x83 */
    "f21",           /* VK_F21            0x84 */
    "f22",           /* VK_F22            0x85 */
    "f23",           /* VK_F23            0x86 */
    "f24",           /* VK_F24            0x87 */

    0, 0, 0, 0,      /*    0x88 .. 0x8B        */
    0, 0, 0, 0,      /*    0x8C .. 0x8F        */

    "kp-numlock",    /* VK_NUMLOCK        0x90 */
    "scroll",        /* VK_SCROLL         0x91 */
    /* Not sure where the following block comes from.
       Windows headers have NEC and Fujitsu specific keys in
       this block, but nothing generic.  */
    "kp-space",	     /* VK_NUMPAD_CLEAR   0x92 */
    "kp-enter",	     /* VK_NUMPAD_ENTER   0x93 */
    "kp-prior",	     /* VK_NUMPAD_PRIOR   0x94 */
    "kp-next",	     /* VK_NUMPAD_NEXT    0x95 */
    "kp-end",	     /* VK_NUMPAD_END     0x96 */
    "kp-home",	     /* VK_NUMPAD_HOME    0x97 */
    "kp-left",	     /* VK_NUMPAD_LEFT    0x98 */
    "kp-up",	     /* VK_NUMPAD_UP      0x99 */
    "kp-right",	     /* VK_NUMPAD_RIGHT   0x9A */
    "kp-down",	     /* VK_NUMPAD_DOWN    0x9B */
    "kp-insert",     /* VK_NUMPAD_INSERT  0x9C */
    "kp-delete",     /* VK_NUMPAD_DELETE  0x9D */

    0, 0,	     /*    0x9E .. 0x9F        */

    /*
     * VK_L* & VK_R* - left and right Alt, Ctrl and Shift virtual keys.
     * Used only as parameters to GetAsyncKeyState and GetKeyState.
     * No other API or message will distinguish left and right keys this way.
     * 0xA0 .. 0xA5
     */
    0, 0, 0, 0, 0, 0,

    /* Multimedia keys. These are handled as WM_APPCOMMAND, which allows us
       to enable them selectively, and gives access to a few more functions.
       See lispy_multimedia_keys below.  */
    0, 0, 0, 0, 0, 0, 0, /* 0xA6 .. 0xAC        Browser */
    0, 0, 0,             /* 0xAD .. 0xAF         Volume */
    0, 0, 0, 0,          /* 0xB0 .. 0xB3          Media */
    0, 0, 0, 0,          /* 0xB4 .. 0xB7           Apps */

    /* 0xB8 .. 0xC0 "OEM" keys - all seem to be punctuation.  */
    0, 0, 0, 0, 0, 0, 0, 0, 0,

    /* 0xC1 - 0xDA unallocated, 0xDB-0xDF more OEM keys */
    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,

    0,               /* 0xE0                   */
    "ax",            /* VK_OEM_AX         0xE1 */
    0,               /* VK_OEM_102        0xE2 */
    "ico-help",      /* VK_ICO_HELP       0xE3 */
    "ico-00",        /* VK_ICO_00         0xE4 */
    0,               /* VK_PROCESSKEY     0xE5 - used by IME */
    "ico-clear",     /* VK_ICO_CLEAR      0xE6 */
    0,               /* VK_PACKET         0xE7  - used to pass Unicode chars */
    0,               /*                   0xE8 */
    "reset",         /* VK_OEM_RESET      0xE9 */
    "jump",          /* VK_OEM_JUMP       0xEA */
    "oem-pa1",       /* VK_OEM_PA1        0xEB */
    "oem-pa2",       /* VK_OEM_PA2        0xEC */
    "oem-pa3",       /* VK_OEM_PA3        0xED */
    "wsctrl",        /* VK_OEM_WSCTRL     0xEE */
    "cusel",         /* VK_OEM_CUSEL      0xEF */
    "oem-attn",      /* VK_OEM_ATTN       0xF0 */
    "finish",        /* VK_OEM_FINISH     0xF1 */
    "copy",          /* VK_OEM_COPY       0xF2 */
    "auto",          /* VK_OEM_AUTO       0xF3 */
    "enlw",          /* VK_OEM_ENLW       0xF4 */
    "backtab",       /* VK_OEM_BACKTAB    0xF5 */
    "attn",          /* VK_ATTN           0xF6 */
    "crsel",         /* VK_CRSEL          0xF7 */
    "exsel",         /* VK_EXSEL          0xF8 */
    "ereof",         /* VK_EREOF          0xF9 */
    "play",          /* VK_PLAY           0xFA */
    "zoom",          /* VK_ZOOM           0xFB */
    "noname",        /* VK_NONAME         0xFC */
    "pa1",           /* VK_PA1            0xFD */
    "oem_clear",     /* VK_OEM_CLEAR      0xFE */
    0 /* 0xFF */
  };

/* Some of these duplicate the "Media keys" on newer keyboards,
   but they are delivered to the application in a different way.  */
static const char *const lispy_multimedia_keys[] =
  {
    0,
    "browser-back",
    "browser-forward",
    "browser-refresh",
    "browser-stop",
    "browser-search",
    "browser-favorites",
    "browser-home",
    "volume-mute",
    "volume-down",
    "volume-up",
    "media-next",
    "media-previous",
    "media-stop",
    "media-play-pause",
    "mail",
    "media-select",
    "app-1",
    "app-2",
    "bass-down",
    "bass-boost",
    "bass-up",
    "treble-down",
    "treble-up",
    "mic-volume-mute",
    "mic-volume-down",
    "mic-volume-up",
    "help",
    "find",
    "new",
    "open",
    "close",
    "save",
    "print",
    "undo",
    "redo",
    "copy",
    "cut",
    "paste",
    "mail-reply",
    "mail-forward",
    "mail-send",
    "spell-check",
    "toggle-dictate-command",
    "mic-toggle",
    "correction-list",
    "media-play",
    "media-pause",
    "media-record",
    "media-fast-forward",
    "media-rewind",
    "media-channel-up",
    "media-channel-down"
  };

#else /* not HAVE_NTGUI */

/* This should be dealt with in XTread_socket now, and that doesn't
   depend on the client system having the Kana syms defined.  See also
   the XK_kana_A case below.  */
#if 0
#ifdef XK_kana_A
static const char *const lispy_kana_keys[] =
  {
    /* X Keysym value */
    0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,	/* 0x400 .. 0x40f */
    0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,	/* 0x410 .. 0x41f */
    0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,	/* 0x420 .. 0x42f */
    0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,	/* 0x430 .. 0x43f */
    0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,	/* 0x440 .. 0x44f */
    0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,	/* 0x450 .. 0x45f */
    0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,	/* 0x460 .. 0x46f */
    0,0,0,0,0,0,0,0,0,0,0,0,0,0,"overline",0,
    0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,	/* 0x480 .. 0x48f */
    0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,	/* 0x490 .. 0x49f */
    0, "kana-fullstop", "kana-openingbracket", "kana-closingbracket",
    "kana-comma", "kana-conjunctive", "kana-WO", "kana-a",
    "kana-i", "kana-u", "kana-e", "kana-o",
    "kana-ya", "kana-yu", "kana-yo", "kana-tsu",
    "prolongedsound", "kana-A", "kana-I", "kana-U",
    "kana-E", "kana-O", "kana-KA", "kana-KI",
    "kana-KU", "kana-KE", "kana-KO", "kana-SA",
    "kana-SHI", "kana-SU", "kana-SE", "kana-SO",
    "kana-TA", "kana-CHI", "kana-TSU", "kana-TE",
    "kana-TO", "kana-NA", "kana-NI", "kana-NU",
    "kana-NE", "kana-NO", "kana-HA", "kana-HI",
    "kana-FU", "kana-HE", "kana-HO", "kana-MA",
    "kana-MI", "kana-MU", "kana-ME", "kana-MO",
    "kana-YA", "kana-YU", "kana-YO", "kana-RA",
    "kana-RI", "kana-RU", "kana-RE", "kana-RO",
    "kana-WA", "kana-N", "voicedsound", "semivoicedsound",
    0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,	/* 0x4e0 .. 0x4ef */
    0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,	/* 0x4f0 .. 0x4ff */
  };
#endif /* XK_kana_A */
#endif /* 0 */

#define FUNCTION_KEY_OFFSET 0xff00

/* You'll notice that this table is arranged to be conveniently
   indexed by X Windows keysym values.  */
static const char *const lispy_function_keys[] =
  {
    /* X Keysym value */

    0, 0, 0, 0, 0, 0, 0, 0,			      /* 0xff00...0f */
    "backspace", "tab", "linefeed", "clear",
    0, "return", 0, 0,
    0, 0, 0, "pause",				      /* 0xff10...1f */
    0, 0, 0, 0, 0, 0, 0, "escape",
    0, 0, 0, 0,
    0, "kanji", "muhenkan", "henkan",		      /* 0xff20...2f */
    "romaji", "hiragana", "katakana", "hiragana-katakana",
    "zenkaku", "hankaku", "zenkaku-hankaku", "touroku",
    "massyo", "kana-lock", "kana-shift", "eisu-shift",
    "eisu-toggle",				      /* 0xff30...3f */
       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,   /* 0xff40...4f */

    "home", "left", "up", "right", /* 0xff50 */	/* IsCursorKey */
    "down", "prior", "next", "end",
    "begin", 0, 0, 0, 0, 0, 0, 0,
    "select",			/* 0xff60 */	/* IsMiscFunctionKey */
    "print",
    "execute",
    "insert",
    0,		/* 0xff64 */
    "undo",
    "redo",
    "menu",
    "find",
    "cancel",
    "help",
    "break",			/* 0xff6b */

    0, 0, 0, 0,
    0, 0, 0, 0, "backtab", 0, 0, 0,		/* 0xff70...  */
    0, 0, 0, 0, 0, 0, 0, "kp-numlock",		/* 0xff78...  */
    "kp-space",			/* 0xff80 */	/* IsKeypadKey */
    0, 0, 0, 0, 0, 0, 0, 0,
    "kp-tab",			/* 0xff89 */
    0, 0, 0,
    "kp-enter",			/* 0xff8d */
    0, 0, 0,
    "kp-f1",			/* 0xff91 */
    "kp-f2",
    "kp-f3",
    "kp-f4",
    "kp-home",			/* 0xff95 */
    "kp-left",
    "kp-up",
    "kp-right",
    "kp-down",
    "kp-prior",			/* kp-page-up */
    "kp-next",			/* kp-page-down */
    "kp-end",
    "kp-begin",
    "kp-insert",
    "kp-delete",
    0,				/* 0xffa0 */
    0, 0, 0, 0, 0, 0, 0, 0, 0,
    "kp-multiply",		/* 0xffaa */
    "kp-add",
    "kp-separator",
    "kp-subtract",
    "kp-decimal",
    "kp-divide",		/* 0xffaf */
    "kp-0",			/* 0xffb0 */
    "kp-1",	"kp-2",	"kp-3",	"kp-4",	"kp-5",	"kp-6",	"kp-7",	"kp-8",	"kp-9",
    0,		/* 0xffba */
    0, 0,
    "kp-equal",			/* 0xffbd */
    "f1",			/* 0xffbe */	/* IsFunctionKey */
    "f2",
    "f3", "f4", "f5", "f6", "f7", "f8",	"f9", "f10", /* 0xffc0 */
    "f11", "f12", "f13", "f14", "f15", "f16", "f17", "f18",
    "f19", "f20", "f21", "f22", "f23", "f24", "f25", "f26", /* 0xffd0 */
    "f27", "f28", "f29", "f30", "f31", "f32", "f33", "f34",
    "f35", 0, 0, 0, 0, 0, 0, 0,	/* 0xffe0 */
    0, 0, 0, 0, 0, 0, 0, 0,
    0, 0, 0, 0, 0, 0, 0, 0,     /* 0xfff0 */
    0, 0, 0, 0, 0, 0, 0, "delete"
  };

/* ISO 9995 Function and Modifier Keys; the first byte is 0xFE.  */
#define ISO_FUNCTION_KEY_OFFSET 0xfe00

static const char *const iso_lispy_function_keys[] =
  {
    0, 0, 0, 0, 0, 0, 0, 0,	/* 0xfe00 */
    0, 0, 0, 0, 0, 0, 0, 0,	/* 0xfe08 */
    0, 0, 0, 0, 0, 0, 0, 0,	/* 0xfe10 */
    0, 0, 0, 0, 0, 0, 0, 0,	/* 0xfe18 */
    "iso-lefttab",		/* 0xfe20 */
    "iso-move-line-up", "iso-move-line-down",
    "iso-partial-line-up", "iso-partial-line-down",
    "iso-partial-space-left", "iso-partial-space-right",
    "iso-set-margin-left", "iso-set-margin-right", /* 0xffe27, 28 */
    "iso-release-margin-left", "iso-release-margin-right",
    "iso-release-both-margins",
    "iso-fast-cursor-left", "iso-fast-cursor-right",
    "iso-fast-cursor-up", "iso-fast-cursor-down",
    "iso-continuous-underline", "iso-discontinuous-underline", /* 0xfe30, 31 */
    "iso-emphasize", "iso-center-object", "iso-enter", /* ... 0xfe34 */
  };

#endif /* not HAVE_NTGUI */

static Lisp_Object Vlispy_mouse_stem;

static const char *const lispy_wheel_names[] =
{
  "wheel-up", "wheel-down", "wheel-left", "wheel-right"
};

/* drag-n-drop events are generated when a set of selected files are
   dragged from another application and dropped onto an Emacs window.  */
static const char *const lispy_drag_n_drop_names[] =
{
  "drag-n-drop"
};

/* An array of symbol indexes of scroll bar parts, indexed by an enum
   scroll_bar_part value.  Note that Qnil corresponds to
   scroll_bar_nowhere and should not appear in Lisp events.  */
static short const scroll_bar_parts[] = {
  SYMBOL_INDEX (Qnil), SYMBOL_INDEX (Qabove_handle), SYMBOL_INDEX (Qhandle),
  SYMBOL_INDEX (Qbelow_handle), SYMBOL_INDEX (Qup), SYMBOL_INDEX (Qdown),
  SYMBOL_INDEX (Qtop), SYMBOL_INDEX (Qbottom), SYMBOL_INDEX (Qend_scroll),
  SYMBOL_INDEX (Qratio), SYMBOL_INDEX (Qbefore_handle),
  SYMBOL_INDEX (Qhorizontal_handle), SYMBOL_INDEX (Qafter_handle),
  SYMBOL_INDEX (Qleft), SYMBOL_INDEX (Qright), SYMBOL_INDEX (Qleftmost),
  SYMBOL_INDEX (Qrightmost), SYMBOL_INDEX (Qend_scroll), SYMBOL_INDEX (Qratio)
};

#ifdef HAVE_WINDOW_SYSTEM
/* An array of symbol indexes of internal border parts, indexed by an enum
   internal_border_part value.  Note that Qnil corresponds to
   internal_border_part_none and should not appear in Lisp events.  */
static short const internal_border_parts[] = {
  SYMBOL_INDEX (Qnil), SYMBOL_INDEX (Qleft_edge),
  SYMBOL_INDEX (Qtop_left_corner), SYMBOL_INDEX (Qtop_edge),
  SYMBOL_INDEX (Qtop_right_corner), SYMBOL_INDEX (Qright_edge),
  SYMBOL_INDEX (Qbottom_right_corner), SYMBOL_INDEX (Qbottom_edge),
  SYMBOL_INDEX (Qbottom_left_corner)
};
#endif

/* A vector, indexed by button number, giving the down-going location
   of currently depressed buttons, both scroll bar and non-scroll bar.

   The elements have the form
     (BUTTON-NUMBER MODIFIER-MASK . REST)
   where REST is the cdr of a position as it would be reported in the event.

   The make_lispy_event function stores positions here to tell the
   difference between click and drag events, and to store the starting
   location to be included in drag events.  */

static Lisp_Object button_down_location;

/* A cons recording the original frame-relative x and y coordinates of
   the down mouse event.  */
static Lisp_Object frame_relative_event_pos;

/* Information about the most recent up-going button event:  Which
   button, what location, and what time.  */

static int last_mouse_button;
static int last_mouse_x;
static int last_mouse_y;
static Time button_down_time;

/* The number of clicks in this multiple-click.  */

static int double_click_count;

/* X and Y are frame-relative coordinates for a click or wheel event.
   Return a Lisp-style event list.  */

static Lisp_Object
make_lispy_position (struct frame *f, Lisp_Object x, Lisp_Object y,
		     Time t)
{
  enum window_part part;
  Lisp_Object posn = Qnil;
  Lisp_Object extra_info = Qnil;
  /* Coordinate pixel positions to return.  */
  int xret = 0, yret = 0;
  /* The window or frame under frame pixel coordinates (x,y)  */
  Lisp_Object window_or_frame = f
    ? window_from_coordinates (f, XFIXNUM (x), XFIXNUM (y), &part, 0, 0)
    : Qnil;

  if (WINDOWP (window_or_frame))
    {
      /* It's a click in window WINDOW at frame coordinates (X,Y)  */
      struct window *w = XWINDOW (window_or_frame);
      Lisp_Object string_info = Qnil;
      ptrdiff_t textpos = 0;
      int col = -1, row = -1;
      int dx  = -1, dy  = -1;
      int width = -1, height = -1;
      Lisp_Object object = Qnil;

      /* Pixel coordinates relative to the window corner.  */
      int wx = XFIXNUM (x) - WINDOW_LEFT_EDGE_X (w);
      int wy = XFIXNUM (y) - WINDOW_TOP_EDGE_Y (w);

      /* For text area clicks, return X, Y relative to the corner of
	 this text area.  Note that dX, dY etc are set below, by
	 buffer_posn_from_coords.  */
      if (part == ON_TEXT)
	{
	  xret = XFIXNUM (x) - window_box_left (w, TEXT_AREA);
	  yret = wy - WINDOW_TAB_LINE_HEIGHT (w) - WINDOW_HEADER_LINE_HEIGHT (w);
	}
      /* For mode line and header line clicks, return X, Y relative to
	 the left window edge.  Use mode_line_string to look for a
	 string on the click position.  */
      else if (part == ON_MODE_LINE || part == ON_TAB_LINE
	       || part == ON_HEADER_LINE)
	{
	  Lisp_Object string;
	  ptrdiff_t charpos;

	  posn = (part == ON_MODE_LINE ? Qmode_line
		  : (part == ON_TAB_LINE ? Qtab_line
		     : Qheader_line));

	  /* Note that mode_line_string takes COL, ROW as pixels and
	     converts them to characters.  */
	  col = wx;
	  row = wy;
	  string = mode_line_string (w, part, &col, &row, &charpos,
				     &object, &dx, &dy, &width, &height);
	  if (STRINGP (string))
	    string_info = Fcons (string, make_fixnum (charpos));
	  textpos = -1;

	  xret = wx;
	  yret = wy;
	}
      /* For fringes and margins, Y is relative to the area's (and the
	 window's) top edge, while X is meaningless.  */
      else if (part == ON_LEFT_MARGIN || part == ON_RIGHT_MARGIN)
	{
	  Lisp_Object string;
	  ptrdiff_t charpos;

	  posn = (part == ON_LEFT_MARGIN) ? Qleft_margin : Qright_margin;
	  col = wx;
	  row = wy;
	  string = marginal_area_string (w, part, &col, &row, &charpos,
					 &object, &dx, &dy, &width, &height);
	  if (STRINGP (string))
	    string_info = Fcons (string, make_fixnum (charpos));
	  xret = wx;
	  yret = wy - WINDOW_TAB_LINE_HEIGHT (w) - WINDOW_HEADER_LINE_HEIGHT (w);
	}
      else if (part == ON_LEFT_FRINGE)
	{
	  posn = Qleft_fringe;
	  col = 0;
	  xret = wx;
	  dx = wx
	    - (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w)
	       ? 0 : window_box_width (w, LEFT_MARGIN_AREA));
	  dy = yret = wy - WINDOW_TAB_LINE_HEIGHT (w) - WINDOW_HEADER_LINE_HEIGHT (w);
	}
      else if (part == ON_RIGHT_FRINGE)
	{
	  posn = Qright_fringe;
	  col = 0;
	  xret = wx;
	  dx = wx
	    - window_box_width (w, LEFT_MARGIN_AREA)
	    - window_box_width (w, TEXT_AREA)
	    - (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w)
	       ? window_box_width (w, RIGHT_MARGIN_AREA)
	       : 0);
	  dy = yret = wy - WINDOW_TAB_LINE_HEIGHT (w) - WINDOW_HEADER_LINE_HEIGHT (w);
	}
      else if (part == ON_VERTICAL_BORDER)
	{
	  posn = Qvertical_line;
	  width = 1;
	  dx = 0;
	  xret = wx;
	  dy = yret = wy;
	}
      else if (part == ON_VERTICAL_SCROLL_BAR)
	{
	  posn = Qvertical_scroll_bar;
	  width = WINDOW_SCROLL_BAR_AREA_WIDTH (w);
	  dx = xret = wx;
	  dy = yret = wy;
	}
      else if (part == ON_HORIZONTAL_SCROLL_BAR)
	{
	  posn = Qhorizontal_scroll_bar;
	  width = WINDOW_SCROLL_BAR_AREA_HEIGHT (w);
	  dx = xret = wx;
	  dy = yret = wy;
	}
      else if (part == ON_RIGHT_DIVIDER)
	{
	  posn = Qright_divider;
	  width = WINDOW_RIGHT_DIVIDER_WIDTH (w);
	  dx = xret = wx;
	  dy = yret = wy;
	}
      else if (part == ON_BOTTOM_DIVIDER)
	{
	  posn = Qbottom_divider;
	  width = WINDOW_BOTTOM_DIVIDER_WIDTH (w);
	  dx = xret = wx;
	  dy = yret = wy;
	}

      /* For clicks in the text area, fringes, margins, or vertical
	 scroll bar, call buffer_posn_from_coords to extract TEXTPOS,
	 the buffer position nearest to the click.  */
      if (!textpos)
	{
	  Lisp_Object string2, object2 = Qnil;
	  struct display_pos p;
	  int dx2, dy2;
	  int width2, height2;
	  /* The pixel X coordinate passed to buffer_posn_from_coords
	     is the X coordinate relative to the text area for clicks
	     in text-area, right-margin/fringe and right-side vertical
	     scroll bar, zero otherwise.  */
	  int x2
	    = (part == ON_TEXT) ? xret
	    : (part == ON_RIGHT_FRINGE || part == ON_RIGHT_MARGIN
	       || (part == ON_VERTICAL_SCROLL_BAR
		   && WINDOW_HAS_VERTICAL_SCROLL_BAR_ON_RIGHT (w)))
	    ? (XFIXNUM (x) - window_box_left (w, TEXT_AREA))
	    : 0;
	  int y2 = wy;

	  string2 = buffer_posn_from_coords (w, &x2, &y2, &p,
					     &object2, &dx2, &dy2,
					     &width2, &height2);
	  textpos = CHARPOS (p.pos);
	  if (col < 0) col = x2;
	  if (row < 0) row = y2;
	  if (dx < 0) dx = dx2;
	  if (dy < 0) dy = dy2;
	  if (width < 0) width = width2;
	  if (height < 0) height = height2;

	  if (NILP (posn))
	    {
	      posn = make_fixnum (textpos);
	      if (STRINGP (string2))
		string_info = Fcons (string2,
				     make_fixnum (CHARPOS (p.string_pos)));
	    }
	  if (NILP (object))
	    object = object2;
	}

#ifdef HAVE_WINDOW_SYSTEM
      if (IMAGEP (object))
	{
	  Lisp_Object image_map, hotspot;
	  if ((image_map = Fplist_get (XCDR (object), QCmap),
	       !NILP (image_map))
	      && (hotspot = find_hot_spot (image_map, dx, dy),
		  CONSP (hotspot))
	      && (hotspot = XCDR (hotspot), CONSP (hotspot)))
	    posn = XCAR (hotspot);
	}
#endif

      /* Object info.  */
      extra_info
	= list3 (object,
		 Fcons (make_fixnum (dx), make_fixnum (dy)),
		 Fcons (make_fixnum (width), make_fixnum (height)));

      /* String info.  */
      extra_info = Fcons (string_info,
			  Fcons (textpos < 0 ? Qnil : make_fixnum (textpos),
				 Fcons (Fcons (make_fixnum (col),
					       make_fixnum (row)),
					extra_info)));
    }

  else if (f)
    {
      /* Return mouse pixel coordinates here.  */
      XSETFRAME (window_or_frame, f);
      xret = XFIXNUM (x);
      yret = XFIXNUM (y);

#ifdef HAVE_WINDOW_SYSTEM
      if (FRAME_WINDOW_P (f)
	  && FRAME_LIVE_P (f)
	  && FRAME_INTERNAL_BORDER_WIDTH (f) > 0
	  && !NILP (get_frame_param (f, Qdrag_internal_border)))
	{
	  enum internal_border_part part
	    = frame_internal_border_part (f, xret, yret);

	  posn = builtin_lisp_symbol (internal_border_parts[part]);
	}
#endif
    }

  else
    window_or_frame = Qnil;

  return Fcons (window_or_frame,
		Fcons (posn,
		       Fcons (Fcons (make_fixnum (xret),
				     make_fixnum (yret)),
			      Fcons (INT_TO_INTEGER (t),
				     extra_info))));
}

/* Return non-zero if F is a GUI frame that uses some toolkit-managed
   menu bar.  This really means that Emacs draws and manages the menu
   bar as part of its normal display, and therefore can compute its
   geometry.  */
static bool
toolkit_menubar_in_use (struct frame *f)
{
#ifdef HAVE_EXT_MENU_BAR
  return !(!FRAME_WINDOW_P (f));
#else
  return false;
#endif
}

/* Build the part of Lisp event which represents scroll bar state from
   EV.  TYPE is one of Qvertical_scroll_bar or Qhorizontal_scroll_bar.  */

static Lisp_Object
make_scroll_bar_position (struct input_event *ev, Lisp_Object type)
{
  return list5 (ev->frame_or_window, type, Fcons (ev->x, ev->y),
		INT_TO_INTEGER (ev->timestamp),
		builtin_lisp_symbol (scroll_bar_parts[ev->part]));
}

/* Given a struct input_event, build the lisp event which represents
   it.  If EVENT is 0, build a mouse movement event from the mouse
   movement buffer, which should have a movement event in it.

   Note that events must be passed to this function in the order they
   are received; this function stores the location of button presses
   in order to build drag events when the button is released.  */

static Lisp_Object
make_lispy_event (struct input_event *event)
{
  int i;

  switch (event->kind)
    {
#ifdef HAVE_WINDOW_SYSTEM
    case DELETE_WINDOW_EVENT:
      /* Make an event (delete-frame (FRAME)).  */
      return list2 (Qdelete_frame, list1 (event->frame_or_window));

    case ICONIFY_EVENT:
      /* Make an event (iconify-frame (FRAME)).  */
      return list2 (Qiconify_frame, list1 (event->frame_or_window));

    case DEICONIFY_EVENT:
      /* Make an event (make-frame-visible (FRAME)).  */
      return list2 (Qmake_frame_visible, list1 (event->frame_or_window));

    case MOVE_FRAME_EVENT:
      /* Make an event (move-frame (FRAME)).  */
      return list2 (Qmove_frame, list1 (event->frame_or_window));
#endif

    /* Just discard these, by returning nil.
       With MULTI_KBOARD, these events are used as placeholders
       when we need to randomly delete events from the queue.
       (They shouldn't otherwise be found in the buffer,
       but on some machines it appears they do show up
       even without MULTI_KBOARD.)  */
    /* On Windows NT/9X, NO_EVENT is used to delete extraneous
       mouse events during a popup-menu call.  */
    case NO_EVENT:
      return Qnil;

    case HELP_EVENT:
      {
	Lisp_Object frame = event->frame_or_window;
	Lisp_Object object = event->arg;
	Lisp_Object position
          = make_fixnum (Time_to_position (event->timestamp));
	Lisp_Object window = event->x;
	Lisp_Object help = event->y;
	clear_event (event);

	if (!WINDOWP (window))
	  window = Qnil;
	return Fcons (Qhelp_echo,
		      list5 (frame, help, window, object, position));
      }

    case FOCUS_IN_EVENT:
        return make_lispy_focus_in (event->frame_or_window);

    case FOCUS_OUT_EVENT:
        return make_lispy_focus_out (event->frame_or_window);

    /* A simple keystroke.  */
    case ASCII_KEYSTROKE_EVENT:
    case MULTIBYTE_CHAR_KEYSTROKE_EVENT:
      {
	Lisp_Object lispy_c;
	EMACS_INT c = event->code;
	if (event->kind == ASCII_KEYSTROKE_EVENT)
	  {
	    c &= 0377;
	    eassert (c == event->code);
          }

        /* Caps-lock shouldn't affect interpretation of key chords:
           Control+s should produce C-s whether caps-lock is on or
           not.  And Control+Shift+s should produce C-S-s whether
           caps-lock is on or not.  */
        if (event->modifiers & ~shift_modifier)
	  {
            /* This is a key chord: some non-shift modifier is
               depressed.  */

            if (uppercasep (c) &&
                !(event->modifiers & shift_modifier))
	      {
                /* Got a capital letter without a shift.  The caps
                   lock is on.   Un-capitalize the letter.  */
                c = downcase (c);
	      }
            else if (lowercasep (c) &&
                     (event->modifiers & shift_modifier))
	      {
                /* Got a lower-case letter even though shift is
                   depressed.  The caps lock is on.  Capitalize the
                   letter.  */
                c = upcase (c);
	      }
	  }

	if (event->kind == ASCII_KEYSTROKE_EVENT)
	  {
	    /* Turn ASCII characters into control characters
	       when proper.  */
	    if (event->modifiers & ctrl_modifier)
	      {
		c = make_ctrl_char (c);
		event->modifiers &= ~ctrl_modifier;
	      }
	  }

	/* Add in the other modifier bits.  The shift key was taken care
	   of by the X code.  */
	c |= (event->modifiers
	      & (meta_modifier | alt_modifier
		 | hyper_modifier | super_modifier | ctrl_modifier));
	/* Distinguish Shift-SPC from SPC.  */
	if ((event->code) == 040
	    && event->modifiers & shift_modifier)
	  c |= shift_modifier;
	button_down_time = 0;
	XSETFASTINT (lispy_c, c);
	return lispy_c;
      }

#ifdef HAVE_NS
    case NS_TEXT_EVENT:
      return list1 (intern (event->code == KEY_NS_PUT_WORKING_TEXT
                            ? "ns-put-working-text"
                            : "ns-unput-working-text"));

      /* NS_NONKEY_EVENTs are just like NON_ASCII_KEYSTROKE_EVENTs,
	 except that they are non-key events (last-nonmenu-event is nil).  */
    case NS_NONKEY_EVENT:
#endif

      /* A function key.  The symbol may need to have modifier prefixes
	 tacked onto it.  */
    case NON_ASCII_KEYSTROKE_EVENT:
      button_down_time = 0;

      for (i = 0; i < ARRAYELTS (lispy_accent_codes); i++)
	if (event->code == lispy_accent_codes[i])
	  return modify_event_symbol (i,
				      event->modifiers,
				      Qfunction_key, Qnil,
				      lispy_accent_keys, &accent_key_syms,
                                      ARRAYELTS (lispy_accent_keys));

#if 0
#ifdef XK_kana_A
      if (event->code >= 0x400 && event->code < 0x500)
	return modify_event_symbol (event->code - 0x400,
				    event->modifiers & ~shift_modifier,
				    Qfunction_key, Qnil,
				    lispy_kana_keys, &func_key_syms,
                                    ARRAYELTS (lispy_kana_keys));
#endif /* XK_kana_A */
#endif /* 0 */

#ifdef ISO_FUNCTION_KEY_OFFSET
      if (event->code < FUNCTION_KEY_OFFSET
	  && event->code >= ISO_FUNCTION_KEY_OFFSET)
	return modify_event_symbol (event->code - ISO_FUNCTION_KEY_OFFSET,
				    event->modifiers,
				    Qfunction_key, Qnil,
				    iso_lispy_function_keys, &func_key_syms,
                                    ARRAYELTS (iso_lispy_function_keys));
#endif

      if ((FUNCTION_KEY_OFFSET <= event->code
	   && (event->code
	       < FUNCTION_KEY_OFFSET + ARRAYELTS (lispy_function_keys)))
	  && lispy_function_keys[event->code - FUNCTION_KEY_OFFSET])
	return modify_event_symbol (event->code - FUNCTION_KEY_OFFSET,
				    event->modifiers,
				    Qfunction_key, Qnil,
				    lispy_function_keys, &func_key_syms,
				    ARRAYELTS (lispy_function_keys));

      /* Handle system-specific or unknown keysyms.
	 We need to use an alist rather than a vector as the cache
	 since we can't make a vector long enough.  */
      if (NILP (KVAR (current_kboard, system_key_syms)))
	kset_system_key_syms (current_kboard, Fcons (Qnil, Qnil));
      return modify_event_symbol (event->code,
				  event->modifiers,
				  Qfunction_key,
				  KVAR (current_kboard, Vsystem_key_alist),
				  0, &KVAR (current_kboard, system_key_syms),
				  PTRDIFF_MAX);

#ifdef HAVE_NTGUI
    case END_SESSION_EVENT:
      /* Make an event (end-session).  */
      return list1 (Qend_session);

    case LANGUAGE_CHANGE_EVENT:
      /* Make an event (language-change FRAME CODEPAGE LANGUAGE-ID).  */
      return list4 (Qlanguage_change,
		    event->frame_or_window,
		    make_fixnum (event->code),
		    make_fixnum (event->modifiers));

    case MULTIMEDIA_KEY_EVENT:
      if (event->code < ARRAYELTS (lispy_multimedia_keys)
          && event->code > 0 && lispy_multimedia_keys[event->code])
        {
          return modify_event_symbol (event->code, event->modifiers,
                                      Qfunction_key, Qnil,
                                      lispy_multimedia_keys, &func_key_syms,
                                      ARRAYELTS (lispy_multimedia_keys));
        }
      return Qnil;
#endif

      /* A mouse click.  Figure out where it is, decide whether it's
         a press, click or drag, and build the appropriate structure.  */
    case MOUSE_CLICK_EVENT:
#ifndef USE_TOOLKIT_SCROLL_BARS
    case SCROLL_BAR_CLICK_EVENT:
    case HORIZONTAL_SCROLL_BAR_CLICK_EVENT:
#endif
      {
	int button = event->code;
	bool is_double;
	Lisp_Object position;
	Lisp_Object *start_pos_ptr;
	Lisp_Object start_pos;

	position = Qnil;

	/* Build the position as appropriate for this mouse click.  */
	if (event->kind == MOUSE_CLICK_EVENT)
	  {
	    struct frame *f = XFRAME (event->frame_or_window);
	    int row, column;

	    /* Ignore mouse events that were made on frame that
	       have been deleted.  */
	    if (! FRAME_LIVE_P (f))
	      return Qnil;

	    /* EVENT->x and EVENT->y are frame-relative pixel
	       coordinates at this place.  Under old redisplay, COLUMN
	       and ROW are set to frame relative glyph coordinates
	       which are then used to determine whether this click is
	       in a menu (non-toolkit version).  */
	    if (!toolkit_menubar_in_use (f))
	      {
		pixel_to_glyph_coords (f, XFIXNUM (event->x), XFIXNUM (event->y),
				       &column, &row, NULL, 1);

		/* In the non-toolkit version, clicks on the menu bar
		   are ordinary button events in the event buffer.
		   Distinguish them, and invoke the menu.

		   (In the toolkit version, the toolkit handles the
		   menu bar and Emacs doesn't know about it until
		   after the user makes a selection.)  */
		if (row >= 0 && row < FRAME_MENU_BAR_LINES (f)
		  && (event->modifiers & down_modifier))
		  {
		    Lisp_Object items, item;

		    /* Find the menu bar item under `column'.  */
		    item = Qnil;
		    items = FRAME_MENU_BAR_ITEMS (f);
		    for (i = 0; i < ASIZE (items); i += 4)
		      {
			Lisp_Object pos, string;
			string = AREF (items, i + 1);
			pos = AREF (items, i + 3);
			if (NILP (string))
			  break;
			if (column >= XFIXNUM (pos)
			    && column < XFIXNUM (pos) + SCHARS (string))
			  {
			    item = AREF (items, i);
			    break;
			  }
		      }

		    /* ELisp manual 2.4b says (x y) are window
		       relative but code says they are
		       frame-relative.  */
		    position = list4 (event->frame_or_window,
				      Qmenu_bar,
				      Fcons (event->x, event->y),
				      INT_TO_INTEGER (event->timestamp));

		    return list2 (item, position);
		  }
	      }

	    position = make_lispy_position (f, event->x, event->y,
					    event->timestamp);
	  }
#ifndef USE_TOOLKIT_SCROLL_BARS
	else
	  /* It's a scrollbar click.  */
	  position = make_scroll_bar_position (event, Qvertical_scroll_bar);
#endif /* not USE_TOOLKIT_SCROLL_BARS */

	if (button >= ASIZE (button_down_location))
	  {
	    ptrdiff_t incr = button - ASIZE (button_down_location) + 1;
	    button_down_location = larger_vector (button_down_location,
						  incr, -1);
	    mouse_syms = larger_vector (mouse_syms, incr, -1);
	  }

	start_pos_ptr = aref_addr (button_down_location, button);
	start_pos = *start_pos_ptr;
	*start_pos_ptr = Qnil;

	{
	  /* On window-system frames, use the value of
	     double-click-fuzz as is.  On other frames, interpret it
	     as a multiple of 1/8 characters.  */
	  struct frame *f;
	  intmax_t fuzz;

	  if (WINDOWP (event->frame_or_window))
	    f = XFRAME (XWINDOW (event->frame_or_window)->frame);
	  else if (FRAMEP (event->frame_or_window))
	    f = XFRAME (event->frame_or_window);
	  else
	    emacs_abort ();

	  if (FRAME_WINDOW_P (f))
	    fuzz = double_click_fuzz;
	  else
	    fuzz = double_click_fuzz / 8;

	  is_double = (button == last_mouse_button
		       && (eabs (XFIXNUM (event->x) - last_mouse_x) <= fuzz)
		       && (eabs (XFIXNUM (event->y) - last_mouse_y) <= fuzz)
		       && button_down_time != 0
		       && (EQ (Vdouble_click_time, Qt)
			   || (FIXNATP (Vdouble_click_time)
			       && (event->timestamp - button_down_time
				   < XFIXNAT (Vdouble_click_time)))));
	}

	last_mouse_button = button;
	last_mouse_x = XFIXNUM (event->x);
	last_mouse_y = XFIXNUM (event->y);

	/* If this is a button press, squirrel away the location, so
           we can decide later whether it was a click or a drag.  */
	if (event->modifiers & down_modifier)
	  {
	    if (is_double)
	      {
		double_click_count++;
		event->modifiers |= ((double_click_count > 2)
				     ? triple_modifier
				     : double_modifier);
	      }
	    else
	      double_click_count = 1;
	    button_down_time = event->timestamp;
	    *start_pos_ptr = Fcopy_alist (position);
	    frame_relative_event_pos = Fcons (event->x, event->y);
	    ignore_mouse_drag_p = false;
	  }

	/* Now we're releasing a button - check the coordinates to
           see if this was a click or a drag.  */
	else if (event->modifiers & up_modifier)
	  {
	    /* If we did not see a down before this up, ignore the up.
	       Probably this happened because the down event chose a
	       menu item.  It would be an annoyance to treat the
	       release of the button that chose the menu item as a
	       separate event.  */

	    if (!CONSP (start_pos))
	      return Qnil;

	    unsigned click_or_drag_modifier = click_modifier;

	    if (ignore_mouse_drag_p)
	      ignore_mouse_drag_p = false;
	    else
	      {
		intmax_t xdiff = double_click_fuzz, ydiff = double_click_fuzz;

		xdiff = XFIXNUM (event->x)
		  - XFIXNUM (XCAR (frame_relative_event_pos));
		ydiff = XFIXNUM (event->y)
		  - XFIXNUM (XCDR (frame_relative_event_pos));

		if (! (0 < double_click_fuzz
		       && - double_click_fuzz < xdiff
		       && xdiff < double_click_fuzz
		       && - double_click_fuzz < ydiff
		       && ydiff < double_click_fuzz
		       /* Maybe the mouse has moved a lot, caused scrolling, and
			  eventually ended up at the same screen position (but
			  not buffer position) in which case it is a drag, not
			  a click.  */
		       /* FIXME: OTOH if the buffer position has changed
			  because of a timer or process filter rather than
			  because of mouse movement, it should be considered as
			  a click.  But mouse-drag-region completely ignores
			  this case and it hasn't caused any real problem, so
			  it's probably OK to ignore it as well.  */
		       && (EQ (Fcar (Fcdr (start_pos)),
			       Fcar (Fcdr (position))) /* Same buffer pos */
			   || !EQ (Fcar (start_pos),
				   Fcar (position))))) /* Different window */
		  {
		    /* Mouse has moved enough.  */
		    button_down_time = 0;
		    click_or_drag_modifier = drag_modifier;
		  }
		else if (((!EQ (Fcar (start_pos), Fcar (position)))
			  || (!EQ (Fcar (Fcdr (start_pos)),
				   Fcar (Fcdr (position)))))
			 /* Was the down event in a window body? */
			 && FIXNUMP (Fcar (Fcdr (start_pos)))
			 && WINDOW_LIVE_P (Fcar (start_pos))
			 && !NILP (Ffboundp (Qwindow_edges)))
		  /* If the window (etc.) at the mouse position has
		     changed between the down event and the up event,
		     we assume there's been a redisplay between the
		     two events, and we pretend the mouse is still in
		     the old window to prevent a spurious drag event
		     being generated.  */
		  {
		    Lisp_Object edges
		      = call4 (Qwindow_edges, Fcar (start_pos), Qt, Qnil, Qt);
		    int new_x = XFIXNUM (Fcar (frame_relative_event_pos));
		    int new_y = XFIXNUM (Fcdr (frame_relative_event_pos));

		    /* If the up-event is outside the down-event's
		       window, use coordinates that are within it.  */
		    if (new_x < XFIXNUM (Fcar (edges)))
		      new_x = XFIXNUM (Fcar (edges));
		    else if (new_x >= XFIXNUM (Fcar (Fcdr (Fcdr (edges)))))
		      new_x = XFIXNUM (Fcar (Fcdr (Fcdr (edges)))) - 1;
		    if (new_y < XFIXNUM (Fcar (Fcdr (edges))))
		      new_y = XFIXNUM (Fcar (Fcdr (edges)));
		    else if (new_y
			     >= XFIXNUM (Fcar (Fcdr (Fcdr (Fcdr (edges))))))
		      new_y = XFIXNUM (Fcar (Fcdr (Fcdr (Fcdr (edges))))) - 1;

		    position = make_lispy_position
		      (XFRAME (event->frame_or_window),
		       make_fixnum (new_x), make_fixnum (new_y),
		       event->timestamp);
		  }
	      }

	    /* Don't check is_double; treat this as multiple if the
	       down-event was multiple.  */
	    event->modifiers
	      = ((event->modifiers & ~up_modifier)
		 | click_or_drag_modifier
		 | (double_click_count < 2 ? 0
		    : double_click_count == 2 ? double_modifier
		    : triple_modifier));
	  }
	else
	  /* Every mouse event should either have the down_modifier or
             the up_modifier set.  */
	  emacs_abort ();

	{
	  /* Get the symbol we should use for the mouse click.  */
	  Lisp_Object head;

	  head = modify_event_symbol (button,
				      event->modifiers,
				      Qmouse_click, Vlispy_mouse_stem,
				      NULL,
				      &mouse_syms,
				      ASIZE (mouse_syms));
	  if (event->modifiers & drag_modifier)
	    return list3 (head, start_pos, position);
	  else if (event->modifiers & (double_modifier | triple_modifier))
	    return list3 (head, position, make_fixnum (double_click_count));
	  else
	    return list2 (head, position);
	}
      }

    case WHEEL_EVENT:
    case HORIZ_WHEEL_EVENT:
      {
	Lisp_Object position;
	Lisp_Object head;

	/* Build the position as appropriate for this mouse click.  */
	struct frame *f = XFRAME (event->frame_or_window);

	/* Ignore wheel events that were made on frame that have been
	   deleted.  */
	if (! FRAME_LIVE_P (f))
	  return Qnil;

	position = make_lispy_position (f, event->x, event->y,
					event->timestamp);

	/* Set double or triple modifiers to indicate the wheel speed.  */
	{
	  /* On window-system frames, use the value of
	     double-click-fuzz as is.  On other frames, interpret it
	     as a multiple of 1/8 characters.  */
	  struct frame *fr;
	  intmax_t fuzz;
	  int symbol_num;
	  bool is_double;

	  if (WINDOWP (event->frame_or_window))
	    fr = XFRAME (XWINDOW (event->frame_or_window)->frame);
	  else if (FRAMEP (event->frame_or_window))
	    fr = XFRAME (event->frame_or_window);
	  else
	    emacs_abort ();

	  fuzz = FRAME_WINDOW_P (fr)
	    ? double_click_fuzz : double_click_fuzz / 8;

	  if (event->modifiers & up_modifier)
	    {
	      /* Emit a wheel-up event.  */
	      event->modifiers &= ~up_modifier;
	      symbol_num = 0;
	    }
	  else if (event->modifiers & down_modifier)
	    {
	      /* Emit a wheel-down event.  */
	      event->modifiers &= ~down_modifier;
	      symbol_num = 1;
	    }
	  else
	    /* Every wheel event should either have the down_modifier or
	       the up_modifier set.  */
	    emacs_abort ();

          if (event->kind == HORIZ_WHEEL_EVENT)
            symbol_num += 2;

	  is_double = (last_mouse_button == - (1 + symbol_num)
		       && (eabs (XFIXNUM (event->x) - last_mouse_x) <= fuzz)
		       && (eabs (XFIXNUM (event->y) - last_mouse_y) <= fuzz)
		       && button_down_time != 0
		       && (EQ (Vdouble_click_time, Qt)
			   || (FIXNATP (Vdouble_click_time)
			       && (event->timestamp - button_down_time
				   < XFIXNAT (Vdouble_click_time)))));
	  if (is_double)
	    {
	      double_click_count++;
	      event->modifiers |= ((double_click_count > 2)
				   ? triple_modifier
				   : double_modifier);
	    }
	  else
	    {
	      double_click_count = 1;
	      event->modifiers |= click_modifier;
	    }

	  button_down_time = event->timestamp;
	  /* Use a negative value to distinguish wheel from mouse button.  */
	  last_mouse_button = - (1 + symbol_num);
	  last_mouse_x = XFIXNUM (event->x);
	  last_mouse_y = XFIXNUM (event->y);

	  /* Get the symbol we should use for the wheel event.  */
	  head = modify_event_symbol (symbol_num,
				      event->modifiers,
				      Qmouse_click,
				      Qnil,
				      lispy_wheel_names,
				      &wheel_syms,
				      ASIZE (wheel_syms));
	}

        if (NUMBERP (event->arg))
          return list4 (head, position, make_fixnum (double_click_count),
                        event->arg);
	else if (event->modifiers & (double_modifier | triple_modifier))
	  return list3 (head, position, make_fixnum (double_click_count));
	else
	  return list2 (head, position);
      }


#ifdef USE_TOOLKIT_SCROLL_BARS

      /* We don't have down and up events if using toolkit scroll bars,
	 so make this always a click event.  Store in the `part' of
	 the Lisp event a symbol which maps to the following actions:

	 `above_handle'		page up
	 `below_handle'		page down
	 `up'			line up
	 `down'			line down
	 `top'			top of buffer
	 `bottom'		bottom of buffer
	 `handle'		thumb has been dragged.
	 `end-scroll'		end of interaction with scroll bar

	 The incoming input_event contains in its `part' member an
	 index of type `enum scroll_bar_part' which we can use as an
	 index in scroll_bar_parts to get the appropriate symbol.  */

    case SCROLL_BAR_CLICK_EVENT:
      {
	Lisp_Object position, head;

	position = make_scroll_bar_position (event, Qvertical_scroll_bar);

	/* Always treat scroll bar events as clicks.  */
	event->modifiers |= click_modifier;
	event->modifiers &= ~up_modifier;

	if (event->code >= ASIZE (mouse_syms))
          mouse_syms = larger_vector (mouse_syms,
				      event->code - ASIZE (mouse_syms) + 1,
				      -1);

	/* Get the symbol we should use for the mouse click.  */
	head = modify_event_symbol (event->code,
				    event->modifiers,
				    Qmouse_click,
				    Vlispy_mouse_stem,
				    NULL, &mouse_syms,
				    ASIZE (mouse_syms));
	return list2 (head, position);
      }

    case HORIZONTAL_SCROLL_BAR_CLICK_EVENT:
      {
	Lisp_Object position, head;

	position = make_scroll_bar_position (event, Qhorizontal_scroll_bar);

	/* Always treat scroll bar events as clicks.  */
	event->modifiers |= click_modifier;
	event->modifiers &= ~up_modifier;

	if (event->code >= ASIZE (mouse_syms))
          mouse_syms = larger_vector (mouse_syms,
				      event->code - ASIZE (mouse_syms) + 1,
				      -1);

	/* Get the symbol we should use for the mouse click.  */
	head = modify_event_symbol (event->code,
				    event->modifiers,
				    Qmouse_click,
				    Vlispy_mouse_stem,
				    NULL, &mouse_syms,
				    ASIZE (mouse_syms));
	return list2 (head, position);
      }

#endif /* USE_TOOLKIT_SCROLL_BARS */

    case DRAG_N_DROP_EVENT:
      {
	struct frame *f;
	Lisp_Object head, position;
	Lisp_Object files;

	f = XFRAME (event->frame_or_window);
	files = event->arg;

	/* Ignore mouse events that were made on frames that
	   have been deleted.  */
	if (! FRAME_LIVE_P (f))
	  return Qnil;

	position = make_lispy_position (f, event->x, event->y,
					event->timestamp);

	head = modify_event_symbol (0, event->modifiers,
				    Qdrag_n_drop, Qnil,
				    lispy_drag_n_drop_names,
				    &drag_n_drop_syms, 1);
	return list3 (head, position, files);
      }

#ifdef HAVE_EXT_MENU_BAR
    case MENU_BAR_EVENT:
      if (EQ (event->arg, event->frame_or_window))
	/* This is the prefix key.  We translate this to
	   `(menu_bar)' because the code in keyboard.c for menu
	   events, which we use, relies on this.  */
	return list1 (Qmenu_bar);
      return event->arg;
#endif

    case SELECT_WINDOW_EVENT:
      /* Make an event (select-window (WINDOW)).  */
      return list2 (Qselect_window, list1 (event->frame_or_window));

    case TAB_BAR_EVENT:
    case TOOL_BAR_EVENT:
      {
	Lisp_Object res = event->arg;
	Lisp_Object location
	  = event->kind == TAB_BAR_EVENT ? Qtab_bar : Qtool_bar;
	if (SYMBOLP (res)) res = apply_modifiers (event->modifiers, res);
	return list2 (res, list2 (event->frame_or_window, location));
      }

    case USER_SIGNAL_EVENT:
      /* A user signal.  */
      {
	char *name = find_user_signal_name (event->code);
	if (!name)
	  emacs_abort ();
	return intern (name);
      }

    case SAVE_SESSION_EVENT:
      return list2 (Qsave_session, event->arg);

#ifdef HAVE_DBUS
    case DBUS_EVENT:
      {
	return Fcons (Qdbus_event, event->arg);
      }
#endif /* HAVE_DBUS */

#ifdef THREADS_ENABLED
    case THREAD_EVENT:
      {
	return Fcons (Qthread_event, event->arg);
      }
#endif /* THREADS_ENABLED */

#ifdef HAVE_XWIDGETS
    case XWIDGET_EVENT:
      {
        return Fcons (Qxwidget_event, event->arg);
      }
#endif

#ifdef USE_FILE_NOTIFY
    case FILE_NOTIFY_EVENT:
#ifdef HAVE_W32NOTIFY
      /* Make an event (file-notify (DESCRIPTOR ACTION FILE) CALLBACK).  */
      return list3 (Qfile_notify, event->arg, event->frame_or_window);
#else
      return Fcons (Qfile_notify, event->arg);
#endif
#endif /* USE_FILE_NOTIFY */

    case CONFIG_CHANGED_EVENT:
	return list3 (Qconfig_changed_event,
		      event->arg, event->frame_or_window);

      /* The 'kind' field of the event is something we don't recognize.  */
    default:
      emacs_abort ();
    }
}

static Lisp_Object
make_lispy_movement (struct frame *frame, Lisp_Object bar_window, enum scroll_bar_part part,
		     Lisp_Object x, Lisp_Object y, Time t)
{
  /* Is it a scroll bar movement?  */
  if (frame && ! NILP (bar_window))
    {
      Lisp_Object part_sym;

      part_sym = builtin_lisp_symbol (scroll_bar_parts[part]);
      return list2 (Qscroll_bar_movement,
		    list5 (bar_window,
			   Qvertical_scroll_bar,
			   Fcons (x, y),
			   make_fixnum (t),
			   part_sym));
    }
  /* Or is it an ordinary mouse movement?  */
  else
    {
      Lisp_Object position;
      position = make_lispy_position (frame, x, y, t);
      return list2 (Qmouse_movement, position);
    }
}

/* Construct a switch frame event.  */
static Lisp_Object
make_lispy_switch_frame (Lisp_Object frame)
{
  return list2 (Qswitch_frame, frame);
}

static Lisp_Object
make_lispy_focus_in (Lisp_Object frame)
{
  return list2 (Qfocus_in, frame);
}

static Lisp_Object
make_lispy_focus_out (Lisp_Object frame)
{
  return list2 (Qfocus_out, frame);
}

/* Manipulating modifiers.  */

/* Parse the name of SYMBOL, and return the set of modifiers it contains.

   If MODIFIER_END is non-zero, set *MODIFIER_END to the position in
   SYMBOL's name of the end of the modifiers; the string from this
   position is the unmodified symbol name.

   This doesn't use any caches.  */

static int
parse_modifiers_uncached (Lisp_Object symbol, ptrdiff_t *modifier_end)
{
  Lisp_Object name;
  ptrdiff_t i;
  int modifiers;

  CHECK_SYMBOL (symbol);

  modifiers = 0;
  name = SYMBOL_NAME (symbol);

  for (i = 0; i < SBYTES (name) - 1; )
    {
      ptrdiff_t this_mod_end = 0;
      int this_mod = 0;

      /* See if the name continues with a modifier word.
	 Check that the word appears, but don't check what follows it.
	 Set this_mod and this_mod_end to record what we find.  */

      switch (SREF (name, i))
	{
#define SINGLE_LETTER_MOD(BIT)				\
	  (this_mod_end = i + 1, this_mod = BIT)

	case 'A':
	  SINGLE_LETTER_MOD (alt_modifier);
	  break;

	case 'C':
	  SINGLE_LETTER_MOD (ctrl_modifier);
	  break;

	case 'H':
	  SINGLE_LETTER_MOD (hyper_modifier);
	  break;

	case 'M':
	  SINGLE_LETTER_MOD (meta_modifier);
	  break;

	case 'S':
	  SINGLE_LETTER_MOD (shift_modifier);
	  break;

	case 's':
	  SINGLE_LETTER_MOD (super_modifier);
	  break;

#undef SINGLE_LETTER_MOD

#define MULTI_LETTER_MOD(BIT, NAME, LEN)			\
	  if (i + LEN + 1 <= SBYTES (name)			\
	      && ! memcmp (SDATA (name) + i, NAME, LEN))	\
	    {							\
	      this_mod_end = i + LEN;				\
	      this_mod = BIT;					\
	    }

	case 'd':
	  MULTI_LETTER_MOD (drag_modifier, "drag", 4);
	  MULTI_LETTER_MOD (down_modifier, "down", 4);
	  MULTI_LETTER_MOD (double_modifier, "double", 6);
	  break;

	case 't':
	  MULTI_LETTER_MOD (triple_modifier, "triple", 6);
	  break;

	case 'u':
	  MULTI_LETTER_MOD (up_modifier, "up", 2);
	  break;
#undef MULTI_LETTER_MOD

	}

      /* If we found no modifier, stop looking for them.  */
      if (this_mod_end == 0)
	break;

      /* Check there is a dash after the modifier, so that it
	 really is a modifier.  */
      if (this_mod_end >= SBYTES (name)
	  || SREF (name, this_mod_end) != '-')
	break;

      /* This modifier is real; look for another.  */
      modifiers |= this_mod;
      i = this_mod_end + 1;
    }

  /* Should we include the `click' modifier?  */
  if (! (modifiers & (down_modifier | drag_modifier
		      | double_modifier | triple_modifier))
      && i + 7 == SBYTES (name)
      && memcmp (SDATA (name) + i, "mouse-", 6) == 0
      && ('0' <= SREF (name, i + 6) && SREF (name, i + 6) <= '9'))
    modifiers |= click_modifier;

  if (! (modifiers & (double_modifier | triple_modifier))
      && i + 6 < SBYTES (name)
      && memcmp (SDATA (name) + i, "wheel-", 6) == 0)
    modifiers |= click_modifier;

  if (modifier_end)
    *modifier_end = i;

  return modifiers;
}

/* Return a symbol whose name is the modifier prefixes for MODIFIERS
   prepended to the string BASE[0..BASE_LEN-1].
   This doesn't use any caches.  */
static Lisp_Object
apply_modifiers_uncached (int modifiers, char *base, int base_len, int base_len_byte)
{
  /* Since BASE could contain nulls, we can't use intern here; we have
     to use Fintern, which expects a genuine Lisp_String, and keeps a
     reference to it.  */
  char new_mods[sizeof "A-C-H-M-S-s-up-down-drag-double-triple-"];
  int mod_len;

  {
    char *p = new_mods;

    /* Mouse events should not exhibit the `up' modifier once they
       leave the event queue only accessible to C code; `up' will
       always be turned into a click or drag event before being
       presented to lisp code.  But since lisp events can be
       synthesized bypassing the event queue and pushed into
       `unread-command-events' or its companions, it's better to just
       deal with unexpected modifier combinations. */

    if (modifiers & alt_modifier)   { *p++ = 'A'; *p++ = '-'; }
    if (modifiers & ctrl_modifier)  { *p++ = 'C'; *p++ = '-'; }
    if (modifiers & hyper_modifier) { *p++ = 'H'; *p++ = '-'; }
    if (modifiers & meta_modifier)  { *p++ = 'M'; *p++ = '-'; }
    if (modifiers & shift_modifier) { *p++ = 'S'; *p++ = '-'; }
    if (modifiers & super_modifier) { *p++ = 's'; *p++ = '-'; }
    if (modifiers & double_modifier) p = stpcpy (p, "double-");
    if (modifiers & triple_modifier) p = stpcpy (p, "triple-");
    if (modifiers & up_modifier) p = stpcpy (p, "up-");
    if (modifiers & down_modifier) p = stpcpy (p, "down-");
    if (modifiers & drag_modifier) p = stpcpy (p, "drag-");
    /* The click modifier is denoted by the absence of other modifiers.  */

    *p = '\0';

    mod_len = p - new_mods;
  }

  {
    Lisp_Object new_name;

    new_name = make_uninit_multibyte_string (mod_len + base_len,
					     mod_len + base_len_byte);
    memcpy (SDATA (new_name), new_mods, mod_len);
    memcpy (SDATA (new_name) + mod_len, base, base_len_byte);

    return Fintern (new_name, Qnil);
  }
}


static const char *const modifier_names[] =
{
  "up", "down", "drag", "click", "double", "triple", 0, 0,
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  0, 0, "alt", "super", "hyper", "shift", "control", "meta"
};
#define NUM_MOD_NAMES ARRAYELTS (modifier_names)

static Lisp_Object modifier_symbols;

/* Return the list of modifier symbols corresponding to the mask MODIFIERS.  */
static Lisp_Object
lispy_modifier_list (int modifiers)
{
  Lisp_Object modifier_list;
  int i;

  modifier_list = Qnil;
  for (i = 0; (1<<i) <= modifiers && i < NUM_MOD_NAMES; i++)
    if (modifiers & (1<<i))
      modifier_list = Fcons (AREF (modifier_symbols, i),
			     modifier_list);

  return modifier_list;
}


/* Parse the modifiers on SYMBOL, and return a list like (UNMODIFIED MASK),
   where UNMODIFIED is the unmodified form of SYMBOL,
   MASK is the set of modifiers present in SYMBOL's name.
   This is similar to parse_modifiers_uncached, but uses the cache in
   SYMBOL's Qevent_symbol_element_mask property, and maintains the
   Qevent_symbol_elements property.  */

#define KEY_TO_CHAR(k) (XFIXNUM (k) & ((1 << CHARACTERBITS) - 1))

Lisp_Object
parse_modifiers (Lisp_Object symbol)
{
  Lisp_Object elements;

  if (FIXNUMP (symbol))
    return list2i (KEY_TO_CHAR (symbol), XFIXNUM (symbol) & CHAR_MODIFIER_MASK);
  else if (!SYMBOLP (symbol))
    return Qnil;

  elements = Fget (symbol, Qevent_symbol_element_mask);
  if (CONSP (elements))
    return elements;
  else
    {
      ptrdiff_t end;
      int modifiers = parse_modifiers_uncached (symbol, &end);
      Lisp_Object unmodified;
      Lisp_Object mask;

      unmodified = Fintern (make_string (SSDATA (SYMBOL_NAME (symbol)) + end,
					 SBYTES (SYMBOL_NAME (symbol)) - end),
			    Qnil);

      if (modifiers & ~INTMASK)
	emacs_abort ();
      XSETFASTINT (mask, modifiers);
      elements = list2 (unmodified, mask);

      /* Cache the parsing results on SYMBOL.  */
      Fput (symbol, Qevent_symbol_element_mask,
	    elements);
      Fput (symbol, Qevent_symbol_elements,
	    Fcons (unmodified, lispy_modifier_list (modifiers)));

      /* Since we know that SYMBOL is modifiers applied to unmodified,
	 it would be nice to put that in unmodified's cache.
	 But we can't, since we're not sure that parse_modifiers is
	 canonical.  */

      return elements;
    }
}

DEFUN ("internal-event-symbol-parse-modifiers", Fevent_symbol_parse_modifiers,
       Sevent_symbol_parse_modifiers, 1, 1, 0,
       doc: /* Parse the event symbol.  For internal use.  */)
  (Lisp_Object symbol)
{
  /* Fill the cache if needed.  */
  parse_modifiers (symbol);
  /* Ignore the result (which is stored on Qevent_symbol_element_mask)
     and use the Lispier representation stored on Qevent_symbol_elements
     instead.  */
  return Fget (symbol, Qevent_symbol_elements);
}

/* Apply the modifiers MODIFIERS to the symbol BASE.
   BASE must be unmodified.

   This is like apply_modifiers_uncached, but uses BASE's
   Qmodifier_cache property, if present.

   apply_modifiers copies the value of BASE's Qevent_kind property to
   the modified symbol.  */
static Lisp_Object
apply_modifiers (int modifiers, Lisp_Object base)
{
  Lisp_Object cache, idx, entry, new_symbol;

  /* Mask out upper bits.  We don't know where this value's been.  */
  modifiers &= INTMASK;

  if (FIXNUMP (base))
    return make_fixnum (XFIXNUM (base) | modifiers);

  /* The click modifier never figures into cache indices.  */
  cache = Fget (base, Qmodifier_cache);
  XSETFASTINT (idx, (modifiers & ~click_modifier));
  entry = assq_no_quit (idx, cache);

  if (CONSP (entry))
    new_symbol = XCDR (entry);
  else
    {
      /* We have to create the symbol ourselves.  */
      new_symbol = apply_modifiers_uncached (modifiers,
					     SSDATA (SYMBOL_NAME (base)),
					     SCHARS (SYMBOL_NAME (base)),
					     SBYTES (SYMBOL_NAME (base)));

      /* Add the new symbol to the base's cache.  */
      entry = Fcons (idx, new_symbol);
      Fput (base, Qmodifier_cache, Fcons (entry, cache));

      /* We have the parsing info now for free, so we could add it to
	 the caches:
         XSETFASTINT (idx, modifiers);
         Fput (new_symbol, Qevent_symbol_element_mask,
               list2 (base, idx));
         Fput (new_symbol, Qevent_symbol_elements,
               Fcons (base, lispy_modifier_list (modifiers)));
	 Sadly, this is only correct if `base' is indeed a base event,
	 which is not necessarily the case.  -stef  */
    }

  /* Make sure this symbol is of the same kind as BASE.

     You'd think we could just set this once and for all when we
     intern the symbol above, but reorder_modifiers may call us when
     BASE's property isn't set right; we can't assume that just
     because it has a Qmodifier_cache property it must have its
     Qevent_kind set right as well.  */
  if (NILP (Fget (new_symbol, Qevent_kind)))
    {
      Lisp_Object kind;

      kind = Fget (base, Qevent_kind);
      if (! NILP (kind))
	Fput (new_symbol, Qevent_kind, kind);
    }

  return new_symbol;
}


/* Given a symbol whose name begins with modifiers ("C-", "M-", etc),
   return a symbol with the modifiers placed in the canonical order.
   Canonical order is alphabetical, except for down and drag, which
   always come last.  The 'click' modifier is never written out.

   Fdefine_key calls this to make sure that (for example) C-M-foo
   and M-C-foo end up being equivalent in the keymap.  */

Lisp_Object
reorder_modifiers (Lisp_Object symbol)
{
  /* It's hopefully okay to write the code this way, since everything
     will soon be in caches, and no consing will be done at all.  */
  Lisp_Object parsed;

  parsed = parse_modifiers (symbol);
  return apply_modifiers (XFIXNAT (XCAR (XCDR (parsed))),
			  XCAR (parsed));
}


/* For handling events, we often want to produce a symbol whose name
   is a series of modifier key prefixes ("M-", "C-", etcetera) attached
   to some base, like the name of a function key or mouse button.
   modify_event_symbol produces symbols of this sort.

   NAME_TABLE should point to an array of strings, such that NAME_TABLE[i]
   is the name of the i'th symbol.  TABLE_SIZE is the number of elements
   in the table.

   Alternatively, NAME_ALIST_OR_STEM is either an alist mapping codes
   into symbol names, or a string specifying a name stem used to
   construct a symbol name or the form `STEM-N', where N is the decimal
   representation of SYMBOL_NUM.  NAME_ALIST_OR_STEM is used if it is
   non-nil; otherwise NAME_TABLE is used.

   SYMBOL_TABLE should be a pointer to a Lisp_Object whose value will
   persist between calls to modify_event_symbol that it can use to
   store a cache of the symbols it's generated for this NAME_TABLE
   before.  The object stored there may be a vector or an alist.

   SYMBOL_NUM is the number of the base name we want from NAME_TABLE.

   MODIFIERS is a set of modifier bits (as given in struct input_events)
   whose prefixes should be applied to the symbol name.

   SYMBOL_KIND is the value to be placed in the event_kind property of
   the returned symbol.

   The symbols we create are supposed to have an
   `event-symbol-elements' property, which lists the modifiers present
   in the symbol's name.  */

static Lisp_Object
modify_event_symbol (ptrdiff_t symbol_num, int modifiers, Lisp_Object symbol_kind,
		     Lisp_Object name_alist_or_stem, const char *const *name_table,
		     Lisp_Object *symbol_table, ptrdiff_t table_size)
{
  Lisp_Object value;
  Lisp_Object symbol_int;

  /* Get rid of the "vendor-specific" bit here.  */
  XSETINT (symbol_int, symbol_num & 0xffffff);

  /* Is this a request for a valid symbol?  */
  if (symbol_num < 0 || symbol_num >= table_size)
    return Qnil;

  if (CONSP (*symbol_table))
    value = Fcdr (assq_no_quit (symbol_int, *symbol_table));

  /* If *symbol_table doesn't seem to be initialized properly, fix that.
     *symbol_table should be a lisp vector TABLE_SIZE elements long,
     where the Nth element is the symbol for NAME_TABLE[N], or nil if
     we've never used that symbol before.  */
  else
    {
      if (! VECTORP (*symbol_table)
	  || ASIZE (*symbol_table) != table_size)
	*symbol_table = make_nil_vector (table_size);

      value = AREF (*symbol_table, symbol_num);
    }

  /* Have we already used this symbol before?  */
  if (NILP (value))
    {
      /* No; let's create it.  */
      if (CONSP (name_alist_or_stem))
	value = Fcdr_safe (Fassq (symbol_int, name_alist_or_stem));
      else if (STRINGP (name_alist_or_stem))
	{
	  char *buf;
	  ptrdiff_t len = (SBYTES (name_alist_or_stem)
			   + sizeof "-" + INT_STRLEN_BOUND (EMACS_INT));
	  USE_SAFE_ALLOCA;
	  buf = SAFE_ALLOCA (len);
	  esprintf (buf, "%s-%"pI"d", SDATA (name_alist_or_stem),
		    XFIXNUM (symbol_int) + 1);
	  value = intern (buf);
	  SAFE_FREE ();
	}
      else if (name_table != 0 && name_table[symbol_num])
	value = intern (name_table[symbol_num]);

#ifdef HAVE_WINDOW_SYSTEM
      if (NILP (value))
	{
	  char *name = get_keysym_name (symbol_num);
	  if (name)
	    value = intern (name);
	}
#endif

      if (NILP (value))
	{
	  char buf[sizeof "key-" + INT_STRLEN_BOUND (EMACS_INT)];
	  sprintf (buf, "key-%"pD"d", symbol_num);
	  value = intern (buf);
	}

      if (CONSP (*symbol_table))
        *symbol_table = Fcons (Fcons (symbol_int, value), *symbol_table);
      else
	ASET (*symbol_table, symbol_num, value);

      /* Fill in the cache entries for this symbol; this also
	 builds the Qevent_symbol_elements property, which the user
	 cares about.  */
      apply_modifiers (modifiers & click_modifier, value);
      Fput (value, Qevent_kind, symbol_kind);
    }

  /* Apply modifiers to that symbol.  */
  return apply_modifiers (modifiers, value);
}
\f
/* Convert a list that represents an event type,
   such as (ctrl meta backspace), into the usual representation of that
   event type as a number or a symbol.  */

DEFUN ("event-convert-list", Fevent_convert_list, Sevent_convert_list, 1, 1, 0,
       doc: /* Convert the event description list EVENT-DESC to an event type.
EVENT-DESC should contain one base event type (a character or symbol)
and zero or more modifier names (control, meta, hyper, super, shift, alt,
drag, down, double or triple).  The base must be last.

The return value is an event type (a character or symbol) which has
essentially the same base event type and all the specified modifiers.
(Some compatibility base types, like symbols that represent a
character, are not returned verbatim.)  */)
  (Lisp_Object event_desc)
{
  Lisp_Object base = Qnil;
  int modifiers = 0;

  FOR_EACH_TAIL_SAFE (event_desc)
    {
      Lisp_Object elt = XCAR (event_desc);
      int this = 0;

      /* Given a symbol, see if it is a modifier name.  */
      if (SYMBOLP (elt) && CONSP (XCDR (event_desc)))
	this = parse_solitary_modifier (elt);

      if (this != 0)
	modifiers |= this;
      else if (!NILP (base))
	error ("Two bases given in one event");
      else
	base = elt;
    }

  /* Let the symbol A refer to the character A.  */
  if (SYMBOLP (base) && SCHARS (SYMBOL_NAME (base)) == 1)
    XSETINT (base, SREF (SYMBOL_NAME (base), 0));

  if (FIXNUMP (base))
    {
      /* Turn (shift a) into A.  */
      if ((modifiers & shift_modifier) != 0
	  && (XFIXNUM (base) >= 'a' && XFIXNUM (base) <= 'z'))
	{
	  XSETINT (base, XFIXNUM (base) - ('a' - 'A'));
	  modifiers &= ~shift_modifier;
	}

      /* Turn (control a) into C-a.  */
      if (modifiers & ctrl_modifier)
	return make_fixnum ((modifiers & ~ctrl_modifier)
			    | make_ctrl_char (XFIXNUM (base)));
      else
	return make_fixnum (modifiers | XFIXNUM (base));
    }
  else if (SYMBOLP (base))
    return apply_modifiers (modifiers, base);
  else
    error ("Invalid base event");
}

DEFUN ("internal-handle-focus-in", Finternal_handle_focus_in,
       Sinternal_handle_focus_in, 1, 1, 0,
       doc: /* Internally handle focus-in events.
This function potentially generates an artificial switch-frame event.  */)
     (Lisp_Object event)
{
  Lisp_Object frame;
  if (!EQ (CAR_SAFE (event), Qfocus_in) ||
      !CONSP (XCDR (event)) ||
      !FRAMEP ((frame = XCAR (XCDR (event)))))
    error ("invalid focus-in event");

  /* Conceptually, the concept of window manager focus on a particular
     frame and the Emacs selected frame shouldn't be related, but for
     a long time, we automatically switched the selected frame in
     response to focus events, so let's keep doing that.  */
  bool switching = (!EQ (frame, internal_last_event_frame)
                    && !EQ (frame, selected_frame));
  internal_last_event_frame = frame;
  if (switching || !NILP (unread_switch_frame))
    unread_switch_frame = make_lispy_switch_frame (frame);

  return Qnil;
}

/* Try to recognize SYMBOL as a modifier name.
   Return the modifier flag bit, or 0 if not recognized.  */

int
parse_solitary_modifier (Lisp_Object symbol)
{
  Lisp_Object name;

  if (!SYMBOLP (symbol))
    return 0;

  name = SYMBOL_NAME (symbol);

  switch (SREF (name, 0))
    {
#define SINGLE_LETTER_MOD(BIT)				\
      if (SBYTES (name) == 1)				\
	return BIT;

#define MULTI_LETTER_MOD(BIT, NAME, LEN)		\
      if (LEN == SBYTES (name)				\
	  && ! memcmp (SDATA (name), NAME, LEN))	\
	return BIT;

    case 'A':
      SINGLE_LETTER_MOD (alt_modifier);
      break;

    case 'a':
      MULTI_LETTER_MOD (alt_modifier, "alt", 3);
      break;

    case 'C':
      SINGLE_LETTER_MOD (ctrl_modifier);
      break;

    case 'c':
      MULTI_LETTER_MOD (ctrl_modifier, "ctrl", 4);
      MULTI_LETTER_MOD (ctrl_modifier, "control", 7);
      MULTI_LETTER_MOD (click_modifier, "click", 5);
      break;

    case 'H':
      SINGLE_LETTER_MOD (hyper_modifier);
      break;

    case 'h':
      MULTI_LETTER_MOD (hyper_modifier, "hyper", 5);
      break;

    case 'M':
      SINGLE_LETTER_MOD (meta_modifier);
      break;

    case 'm':
      MULTI_LETTER_MOD (meta_modifier, "meta", 4);
      break;

    case 'S':
      SINGLE_LETTER_MOD (shift_modifier);
      break;

    case 's':
      MULTI_LETTER_MOD (shift_modifier, "shift", 5);
      MULTI_LETTER_MOD (super_modifier, "super", 5);
      SINGLE_LETTER_MOD (super_modifier);
      break;

    case 'd':
      MULTI_LETTER_MOD (drag_modifier, "drag", 4);
      MULTI_LETTER_MOD (down_modifier, "down", 4);
      MULTI_LETTER_MOD (double_modifier, "double", 6);
      break;

    case 't':
      MULTI_LETTER_MOD (triple_modifier, "triple", 6);
      break;

    case 'u':
      MULTI_LETTER_MOD (up_modifier, "up", 2);
      break;

#undef SINGLE_LETTER_MOD
#undef MULTI_LETTER_MOD
    }

  return 0;
}

/* Return true if EVENT is a list whose elements are all integers or symbols.
   Such a list is not valid as an event,
   but it can be a Lucid-style event type list.  */

bool
lucid_event_type_list_p (Lisp_Object object)
{
  if (! CONSP (object))
    return false;

  if (EQ (XCAR (object), Qhelp_echo)
      || EQ (XCAR (object), Qvertical_line)
      || EQ (XCAR (object), Qmode_line)
      || EQ (XCAR (object), Qtab_line)
      || EQ (XCAR (object), Qheader_line))
    return false;

  Lisp_Object tail = object;
  FOR_EACH_TAIL_SAFE (object)
    {
      Lisp_Object elt = XCAR (object);
      if (! (FIXNUMP (elt) || SYMBOLP (elt)))
	return false;
      tail = XCDR (object);
    }

  return NILP (tail);
}
\f
/* Return true if terminal input chars are available.
   Also, store the return value into INPUT_PENDING.

   Serves the purpose of ioctl (0, FIONREAD, ...)
   but works even if FIONREAD does not exist.
   (In fact, this may actually read some input.)

   If READABLE_EVENTS_DO_TIMERS_NOW is set in FLAGS, actually run
   timer events that are ripe.
   If READABLE_EVENTS_FILTER_EVENTS is set in FLAGS, ignore internal
   events (FOCUS_IN_EVENT).
   If READABLE_EVENTS_IGNORE_SQUEEZABLES is set in FLAGS, ignore mouse
   movements and toolkit scroll bar thumb drags.  */

static bool
get_input_pending (int flags)
{
  /* First of all, have we already counted some input?  */
  input_pending = (!NILP (Vquit_flag) || readable_events (flags));

  /* If input is being read as it arrives, and we have none, there is none.  */
  if (!input_pending && (!interrupt_input || interrupts_deferred))
    {
      /* Try to read some input and see how much we get.  */
      gobble_input ();
      input_pending = (!NILP (Vquit_flag) || readable_events (flags));
    }

  return input_pending;
}

/* Read any terminal input already buffered up by the system
   into the kbd_buffer, but do not wait.

   Return the number of keyboard chars read, or -1 meaning
   this is a bad time to try to read input.  */

int
gobble_input (void)
{
  int nread = 0;
  bool err = false;
  struct terminal *t;

  /* Store pending user signal events, if any.  */
  store_user_signal_events ();

  /* Loop through the available terminals, and call their input hooks.  */
  t = terminal_list;
  while (t)
    {
      struct terminal *next = t->next_terminal;

      if (t->read_socket_hook)
        {
          int nr;
          struct input_event hold_quit;

	  if (input_blocked_p ())
	    {
	      pending_signals = true;
	      break;
	    }

          EVENT_INIT (hold_quit);
          hold_quit.kind = NO_EVENT;

          /* No need for FIONREAD or fcntl; just say don't wait.  */
	  while ((nr = (*t->read_socket_hook) (t, &hold_quit)) > 0)
	    nread += nr;

          if (nr == -1)          /* Not OK to read input now.  */
            {
              err = true;
            }
          else if (nr == -2)          /* Non-transient error.  */
            {
              /* The terminal device terminated; it should be closed.  */

              /* Kill Emacs if this was our last terminal.  */
              if (!terminal_list->next_terminal)
                /* Formerly simply reported no input, but that
                   sometimes led to a failure of Emacs to terminate.
                   SIGHUP seems appropriate if we can't reach the
                   terminal.  */
                /* ??? Is it really right to send the signal just to
                   this process rather than to the whole process
                   group?  Perhaps on systems with FIONREAD Emacs is
                   alone in its group.  */
		terminate_due_to_signal (SIGHUP, 10);

              /* XXX Is calling delete_terminal safe here?  It calls delete_frame.  */
	      {
		Lisp_Object tmp;
		XSETTERMINAL (tmp, t);
		Fdelete_terminal (tmp, Qnoelisp);
	      }
            }

	  /* If there was no error, make sure the pointer
	     is visible for all frames on this terminal.  */
	  if (nr >= 0)
	    {
	      Lisp_Object tail, frame;

	      FOR_EACH_FRAME (tail, frame)
		{
		  struct frame *f = XFRAME (frame);
		  if (FRAME_TERMINAL (f) == t)
		    frame_make_pointer_visible (f);
		}
	    }

          if (hold_quit.kind != NO_EVENT)
            kbd_buffer_store_event (&hold_quit);
        }

      t = next;
    }

  if (err && !nread)
    nread = -1;

  return nread;
}

/* This is the tty way of reading available input.

   Note that each terminal device has its own `struct terminal' object,
   and so this function is called once for each individual termcap
   terminal.  The first parameter indicates which terminal to read from.  */

int
tty_read_avail_input (struct terminal *terminal,
                      struct input_event *hold_quit)
{
  /* Using KBD_BUFFER_SIZE - 1 here avoids reading more than
     the kbd_buffer can really hold.  That may prevent loss
     of characters on some systems when input is stuffed at us.  */
  unsigned char cbuf[KBD_BUFFER_SIZE - 1];
#ifndef WINDOWSNT
  int n_to_read;
#endif
  int i;
  struct tty_display_info *tty = terminal->display_info.tty;
  int nread = 0;
#ifdef subprocesses
  int buffer_free = KBD_BUFFER_SIZE - kbd_buffer_nr_stored () - 1;

  if (kbd_on_hold_p () || buffer_free <= 0)
    return 0;
#endif	/* subprocesses */

  if (!terminal->name)		/* Don't read from a dead terminal.  */
    return 0;

  if (terminal->type != output_termcap
      && terminal->type != output_msdos_raw)
    emacs_abort ();

  /* XXX I think the following code should be moved to separate hook
     functions in system-dependent files.  */
#ifdef WINDOWSNT
  /* FIXME: AFAIK, tty_read_avail_input is not used under w32 since the non-GUI
     code sets read_socket_hook to w32_console_read_socket instead!  */
  return 0;
#else /* not WINDOWSNT */
  if (! tty->term_initted)      /* In case we get called during bootstrap.  */
    return 0;

  if (! tty->input)
    return 0;                   /* The terminal is suspended.  */

#ifdef MSDOS
  n_to_read = dos_keysns ();
  if (n_to_read == 0)
    return 0;

  cbuf[0] = dos_keyread ();
  nread = 1;

#else /* not MSDOS */
#ifdef HAVE_GPM
  if (gpm_tty == tty)
  {
      Gpm_Event event;
      int gpm, fd = gpm_fd;

      /* gpm==1 if event received.
         gpm==0 if the GPM daemon has closed the connection, in which case
                Gpm_GetEvent closes gpm_fd and clears it to -1, which is why
		we save it in `fd' so close_gpm can remove it from the
		select masks.
         gpm==-1 if a protocol error or EWOULDBLOCK; the latter is normal.  */
      while (gpm = Gpm_GetEvent (&event), gpm == 1) {
	  nread += handle_one_term_event (tty, &event);
      }
      if (gpm == 0)
	/* Presumably the GPM daemon has closed the connection.  */
	close_gpm (fd);
      if (nread)
	  return nread;
  }
#endif /* HAVE_GPM */

/* Determine how many characters we should *try* to read.  */
#ifdef USABLE_FIONREAD
  /* Find out how much input is available.  */
  if (ioctl (fileno (tty->input), FIONREAD, &n_to_read) < 0)
    {
      if (! noninteractive)
        return -2;          /* Close this terminal.  */
      else
        n_to_read = 0;
    }
  if (n_to_read == 0)
    return 0;
  if (n_to_read > sizeof cbuf)
    n_to_read = sizeof cbuf;
#elif defined USG || defined CYGWIN
  /* Read some input if available, but don't wait.  */
  n_to_read = sizeof cbuf;
  fcntl (fileno (tty->input), F_SETFL, O_NONBLOCK);
#else
# error "Cannot read without possibly delaying"
#endif

#ifdef subprocesses
  /* Don't read more than we can store.  */
  if (n_to_read > buffer_free)
    n_to_read = buffer_free;
#endif	/* subprocesses */

  /* Now read; for one reason or another, this will not block.
     NREAD is set to the number of chars read.  */
  nread = emacs_read (fileno (tty->input), (char *) cbuf, n_to_read);
  /* POSIX infers that processes which are not in the session leader's
     process group won't get SIGHUPs at logout time.  BSDI adheres to
     this part standard and returns -1 from read (0) with errno==EIO
     when the control tty is taken away.
     Jeffrey Honig <jch@bsdi.com> says this is generally safe.  */
  if (nread == -1 && errno == EIO)
    return -2;          /* Close this terminal.  */
#if defined AIX && defined _BSD
  /* The kernel sometimes fails to deliver SIGHUP for ptys.
     This looks incorrect, but it isn't, because _BSD causes
     O_NDELAY to be defined in fcntl.h as O_NONBLOCK,
     and that causes a value other than 0 when there is no input.  */
  if (nread == 0)
    return -2;          /* Close this terminal.  */
#endif

#ifndef USABLE_FIONREAD
#if defined (USG) || defined (CYGWIN)
  fcntl (fileno (tty->input), F_SETFL, 0);
#endif /* USG or CYGWIN */
#endif /* no FIONREAD */

  if (nread <= 0)
    return nread;

#endif /* not MSDOS */
#endif /* not WINDOWSNT */

  for (i = 0; i < nread; i++)
    {
      struct input_event buf;
      EVENT_INIT (buf);
      buf.kind = ASCII_KEYSTROKE_EVENT;
      buf.modifiers = 0;
      if (tty->meta_key == 1 && (cbuf[i] & 0x80))
        buf.modifiers = meta_modifier;
      if (tty->meta_key < 2)
        cbuf[i] &= ~0x80;

      buf.code = cbuf[i];
      /* Set the frame corresponding to the active tty.  Note that the
         value of selected_frame is not reliable here, redisplay tends
         to temporarily change it.  */
      buf.frame_or_window = tty->top_frame;
      buf.arg = Qnil;

      kbd_buffer_store_event (&buf);
      /* Don't look at input that follows a C-g too closely.
         This reduces lossage due to autorepeat on C-g.  */
      if (buf.kind == ASCII_KEYSTROKE_EVENT
          && buf.code == quit_char)
        break;
    }

  return nread;
}
\f
static void
handle_async_input (void)
{
#ifdef USABLE_SIGIO
  while (1)
    {
      int nread = gobble_input ();
      /* -1 means it's not ok to read the input now.
	 UNBLOCK_INPUT will read it later; now, avoid infinite loop.
	 0 means there was no keyboard input available.  */
      if (nread <= 0)
	break;
    }
#endif
}

void
process_pending_signals (void)
{
  pending_signals = false;
  handle_async_input ();
  do_pending_atimers ();
}

/* Undo any number of BLOCK_INPUT calls down to level LEVEL,
   and reinvoke any pending signal if the level is now 0 and
   a fatal error is not already in progress.  */

void
unblock_input_to (int level)
{
  interrupt_input_blocked = level;
  if (level == 0)
    {
      if (pending_signals && !fatal_error_in_progress)
	process_pending_signals ();
    }
  else if (level < 0)
    emacs_abort ();
}

/* End critical section.

   If doing signal-driven input, and a signal came in when input was
   blocked, reinvoke the signal handler now to deal with it.

   It will also process queued input, if it was not read before.
   When a longer code sequence does not use block/unblock input
   at all, the whole input gathered up to the next call to
   unblock_input will be processed inside that call. */

void
unblock_input (void)
{
  unblock_input_to (interrupt_input_blocked - 1);
}

/* Undo any number of BLOCK_INPUT calls,
   and also reinvoke any pending signal.  */

void
totally_unblock_input (void)
{
  unblock_input_to (0);
}

#ifdef USABLE_SIGIO

void
handle_input_available_signal (int sig)
{
  pending_signals = true;

  if (input_available_clear_time)
    *input_available_clear_time = make_timespec (0, 0);
}

static void
deliver_input_available_signal (int sig)
{
  deliver_process_signal (sig, handle_input_available_signal);
}
#endif /* USABLE_SIGIO */

\f
/* User signal events.  */

struct user_signal_info
{
  /* Signal number.  */
  int sig;

  /* Name of the signal.  */
  char *name;

  /* Number of pending signals.  */
  int npending;

  struct user_signal_info *next;
};

/* List of user signals.  */
static struct user_signal_info *user_signals = NULL;

void
add_user_signal (int sig, const char *name)
{
  struct sigaction action;
  struct user_signal_info *p;

  for (p = user_signals; p; p = p->next)
    if (p->sig == sig)
      /* Already added.  */
      return;

  p = xmalloc (sizeof *p);
  p->sig = sig;
  p->name = xstrdup (name);
  p->npending = 0;
  p->next = user_signals;
  user_signals = p;

  emacs_sigaction_init (&action, deliver_user_signal);
  sigaction (sig, &action, 0);
}

static void
handle_user_signal (int sig)
{
  struct user_signal_info *p;
  const char *special_event_name = NULL;

  if (SYMBOLP (Vdebug_on_event))
    special_event_name = SSDATA (SYMBOL_NAME (Vdebug_on_event));

  for (p = user_signals; p; p = p->next)
    if (p->sig == sig)
      {
        if (special_event_name
	    && strcmp (special_event_name, p->name) == 0)
          {
            /* Enter the debugger in many ways.  */
            debug_on_next_call = true;
            debug_on_quit = true;
            Vquit_flag = Qt;
            Vinhibit_quit = Qnil;

            /* Eat the event.  */
            break;
          }

	p->npending++;
#ifdef USABLE_SIGIO
	if (interrupt_input)
	  handle_input_available_signal (sig);
	else
#endif
	  {
	    /* Tell wait_reading_process_output that it needs to wake
	       up and look around.  */
	    if (input_available_clear_time)
	      *input_available_clear_time = make_timespec (0, 0);
	  }
	break;
      }
}

static void
deliver_user_signal (int sig)
{
  deliver_process_signal (sig, handle_user_signal);
}

static char *
find_user_signal_name (int sig)
{
  struct user_signal_info *p;

  for (p = user_signals; p; p = p->next)
    if (p->sig == sig)
      return p->name;

  return NULL;
}

static void
store_user_signal_events (void)
{
  struct user_signal_info *p;
  struct input_event buf;
  bool buf_initialized = false;

  for (p = user_signals; p; p = p->next)
    if (p->npending > 0)
      {
	if (! buf_initialized)
	  {
	    memset (&buf, 0, sizeof buf);
	    buf.kind = USER_SIGNAL_EVENT;
	    buf.frame_or_window = selected_frame;
	    buf_initialized = true;
	  }

	do
	  {
	    buf.code = p->sig;
	    kbd_buffer_store_event (&buf);
	    p->npending--;
	  }
	while (p->npending > 0);
      }
}

\f
static void menu_bar_item (Lisp_Object, Lisp_Object, Lisp_Object, void *);
static Lisp_Object menu_bar_one_keymap_changed_items;

/* These variables hold the vector under construction within
   menu_bar_items and its subroutines, and the current index
   for storing into that vector.  */
static Lisp_Object menu_bar_items_vector;
static int menu_bar_items_index;


static const char *separator_names[] = {
  "space",
  "no-line",
  "single-line",
  "double-line",
  "single-dashed-line",
  "double-dashed-line",
  "shadow-etched-in",
  "shadow-etched-out",
  "shadow-etched-in-dash",
  "shadow-etched-out-dash",
  "shadow-double-etched-in",
  "shadow-double-etched-out",
  "shadow-double-etched-in-dash",
  "shadow-double-etched-out-dash",
  0,
};

/* Return true if LABEL specifies a separator.  */

bool
menu_separator_name_p (const char *label)
{
  if (!label)
    return 0;
  else if (strnlen (label, 4) == 4
	   && memcmp (label, "--", 2) == 0
	   && label[2] != '-')
    {
      int i;
      label += 2;
      for (i = 0; separator_names[i]; ++i)
	if (strcmp (label, separator_names[i]) == 0)
          return 1;
    }
  else
    {
      /* It's a separator if it contains only dashes.  */
      while (*label == '-')
	++label;
      return (*label == 0);
    }

  return 0;
}


/* Return a vector of menu items for a menu bar, appropriate
   to the current buffer.  Each item has three elements in the vector:
   KEY STRING MAPLIST.

   OLD is an old vector we can optionally reuse, or nil.  */

Lisp_Object
menu_bar_items (Lisp_Object old)
{
  /* The number of keymaps we're scanning right now, and the number of
     keymaps we have allocated space for.  */
  ptrdiff_t nmaps;

  /* maps[0..nmaps-1] are the prefix definitions of KEYBUF[0..t-1]
     in the current keymaps, or nil where it is not a prefix.  */
  Lisp_Object *maps;

  Lisp_Object mapsbuf[3];
  Lisp_Object def;

  ptrdiff_t mapno;
  Lisp_Object oquit;

  USE_SAFE_ALLOCA;

  /* In order to build the menus, we need to call the keymap
     accessors.  They all call maybe_quit.  But this function is called
     during redisplay, during which a quit is fatal.  So inhibit
     quitting while building the menus.
     We do this instead of specbind because (1) errors will clear it anyway
     and (2) this avoids risk of specpdl overflow.  */
  oquit = Vinhibit_quit;
  Vinhibit_quit = Qt;

  if (!NILP (old))
    menu_bar_items_vector = old;
  else
    menu_bar_items_vector = make_nil_vector (24);
  menu_bar_items_index = 0;

  /* Build our list of keymaps.
     If we recognize a function key and replace its escape sequence in
     keybuf with its symbol, or if the sequence starts with a mouse
     click and we need to switch buffers, we jump back here to rebuild
     the initial keymaps from the current buffer.  */
  {
    Lisp_Object *tmaps;

    /* Should overriding-terminal-local-map and overriding-local-map apply?  */
    if (!NILP (Voverriding_local_map_menu_flag)
	&& !NILP (Voverriding_local_map))
      {
	/* Yes, use them (if non-nil) as well as the global map.  */
	maps = mapsbuf;
	nmaps = 0;
	if (!NILP (KVAR (current_kboard, Voverriding_terminal_local_map)))
	  maps[nmaps++] = KVAR (current_kboard, Voverriding_terminal_local_map);
	if (!NILP (Voverriding_local_map))
	  maps[nmaps++] = Voverriding_local_map;
      }
    else
      {
	/* No, so use major and minor mode keymaps and keymap property.
	   Note that menu-bar bindings in the local-map and keymap
	   properties may not work reliable, as they are only
	   recognized when the menu-bar (or mode-line) is updated,
	   which does not normally happen after every command.  */
	ptrdiff_t nminor = current_minor_maps (NULL, &tmaps);
	SAFE_NALLOCA (maps, 1, nminor + 4);
	nmaps = 0;
	Lisp_Object tem = KVAR (current_kboard, Voverriding_terminal_local_map);
	if (!NILP (tem) && !NILP (Voverriding_local_map_menu_flag))
	  maps[nmaps++] = tem;
	if (tem = get_local_map (PT, current_buffer, Qkeymap), !NILP (tem))
	  maps[nmaps++] = tem;
	if (nminor != 0)
	  {
	    memcpy (maps + nmaps, tmaps, nminor * sizeof (maps[0]));
	    nmaps += nminor;
	  }
	maps[nmaps++] = get_local_map (PT, current_buffer, Qlocal_map);
      }
    maps[nmaps++] = current_global_map;
  }

  /* Look up in each map the dummy prefix key `menu-bar'.  */

  for (mapno = nmaps - 1; mapno >= 0; mapno--)
    if (!NILP (maps[mapno]))
      {
	def = get_keymap (access_keymap (maps[mapno], Qmenu_bar, 1, 0, 1),
			  0, 1);
	if (CONSP (def))
	  {
	    menu_bar_one_keymap_changed_items = Qnil;
	    map_keymap_canonical (def, menu_bar_item, Qnil, NULL);
	  }
      }

  /* Move to the end those items that should be at the end.  */

  Lisp_Object tail = Vmenu_bar_final_items;
  FOR_EACH_TAIL (tail)
    {
      int end = menu_bar_items_index;

      for (int i = 0; i < end; i += 4)
	if (EQ (XCAR (tail), AREF (menu_bar_items_vector, i)))
	  {
	    Lisp_Object tem0, tem1, tem2, tem3;
	    /* Move the item at index I to the end,
	       shifting all the others forward.  */
	    tem0 = AREF (menu_bar_items_vector, i + 0);
	    tem1 = AREF (menu_bar_items_vector, i + 1);
	    tem2 = AREF (menu_bar_items_vector, i + 2);
	    tem3 = AREF (menu_bar_items_vector, i + 3);
	    if (end > i + 4)
	      memmove (aref_addr (menu_bar_items_vector, i),
		       aref_addr (menu_bar_items_vector, i + 4),
		       (end - i - 4) * word_size);
	    ASET (menu_bar_items_vector, end - 4, tem0);
	    ASET (menu_bar_items_vector, end - 3, tem1);
	    ASET (menu_bar_items_vector, end - 2, tem2);
	    ASET (menu_bar_items_vector, end - 1, tem3);
	    break;
	  }
    }

  /* Add nil, nil, nil, nil at the end.  */
  {
    int i = menu_bar_items_index;
    if (i + 4 > ASIZE (menu_bar_items_vector))
      menu_bar_items_vector
	= larger_vector (menu_bar_items_vector, 4, -1);
    /* Add this item.  */
    ASET (menu_bar_items_vector, i, Qnil); i++;
    ASET (menu_bar_items_vector, i, Qnil); i++;
    ASET (menu_bar_items_vector, i, Qnil); i++;
    ASET (menu_bar_items_vector, i, Qnil); i++;
    menu_bar_items_index = i;
  }

  Vinhibit_quit = oquit;
  SAFE_FREE ();
  return menu_bar_items_vector;
}
\f
/* Add one item to menu_bar_items_vector, for KEY, ITEM_STRING and DEF.
   If there's already an item for KEY, add this DEF to it.  */

Lisp_Object item_properties;

static void
menu_bar_item (Lisp_Object key, Lisp_Object item, Lisp_Object dummy1, void *dummy2)
{
  int i;
  bool parsed;
  Lisp_Object tem;

  if (EQ (item, Qundefined))
    {
      /* If a map has an explicit `undefined' as definition,
	 discard any previously made menu bar item.  */

      for (i = 0; i < menu_bar_items_index; i += 4)
	if (EQ (key, AREF (menu_bar_items_vector, i)))
	  {
	    if (menu_bar_items_index > i + 4)
	      memmove (aref_addr (menu_bar_items_vector, i),
		       aref_addr (menu_bar_items_vector, i + 4),
		       (menu_bar_items_index - i - 4) * word_size);
	    menu_bar_items_index -= 4;
	  }
    }

  /* If this keymap has already contributed to this KEY,
     don't contribute to it a second time.  */
  tem = Fmemq (key, menu_bar_one_keymap_changed_items);
  if (!NILP (tem) || NILP (item))
    return;

  menu_bar_one_keymap_changed_items
    = Fcons (key, menu_bar_one_keymap_changed_items);

  /* We add to menu_bar_one_keymap_changed_items before doing the
     parse_menu_item, so that if it turns out it wasn't a menu item,
     it still correctly hides any further menu item.  */
  parsed = parse_menu_item (item, 1);
  if (!parsed)
    return;

  item = AREF (item_properties, ITEM_PROPERTY_DEF);

  /* Find any existing item for this KEY.  */
  for (i = 0; i < menu_bar_items_index; i += 4)
    if (EQ (key, AREF (menu_bar_items_vector, i)))
      break;

  /* If we did not find this KEY, add it at the end.  */
  if (i == menu_bar_items_index)
    {
      /* If vector is too small, get a bigger one.  */
      if (i + 4 > ASIZE (menu_bar_items_vector))
	menu_bar_items_vector = larger_vector (menu_bar_items_vector, 4, -1);
      /* Add this item.  */
      ASET (menu_bar_items_vector, i, key); i++;
      ASET (menu_bar_items_vector, i,
	    AREF (item_properties, ITEM_PROPERTY_NAME)); i++;
      ASET (menu_bar_items_vector, i, list1 (item)); i++;
      ASET (menu_bar_items_vector, i, make_fixnum (0)); i++;
      menu_bar_items_index = i;
    }
  /* We did find an item for this KEY.  Add ITEM to its list of maps.  */
  else
    {
      Lisp_Object old;
      old = AREF (menu_bar_items_vector, i + 2);
      /* If the new and the old items are not both keymaps,
	 the lookup will only find `item'.  */
      item = Fcons (item, KEYMAPP (item) && KEYMAPP (XCAR (old)) ? old : Qnil);
      ASET (menu_bar_items_vector, i + 2, item);
    }
}
\f
 /* This is used as the handler when calling menu_item_eval_property.  */
static Lisp_Object
menu_item_eval_property_1 (Lisp_Object arg)
{
  /* If we got a quit from within the menu computation,
     quit all the way out of it.  This takes care of C-] in the debugger.  */
  if (CONSP (arg) && signal_quit_p (XCAR (arg)))
    quit ();

  return Qnil;
}

static Lisp_Object
eval_dyn (Lisp_Object form)
{
  return Feval (form, Qnil);
}

/* Evaluate an expression and return the result (or nil if something
   went wrong).  Used to evaluate dynamic parts of menu items.  */
Lisp_Object
menu_item_eval_property (Lisp_Object sexpr)
{
  ptrdiff_t count = SPECPDL_INDEX ();
  Lisp_Object val;
  specbind (Qinhibit_redisplay, Qt);
  val = internal_condition_case_1 (eval_dyn, sexpr, Qerror,
				   menu_item_eval_property_1);
  return unbind_to (count, val);
}

/* This function parses a menu item and leaves the result in the
   vector item_properties.
   ITEM is a key binding, a possible menu item.
   INMENUBAR is > 0 when this is considered for an entry in a menu bar
   top level.
   INMENUBAR is < 0 when this is considered for an entry in a keyboard menu.
   parse_menu_item returns true if the item is a menu item and false
   otherwise.  */

bool
parse_menu_item (Lisp_Object item, int inmenubar)
{
  Lisp_Object def, tem, item_string, start;
  Lisp_Object filter;
  Lisp_Object keyhint;
  int i;

  filter = Qnil;
  keyhint = Qnil;

  if (!CONSP (item))
    return 0;

  /* Create item_properties vector if necessary.  */
  if (NILP (item_properties))
    item_properties = make_nil_vector (ITEM_PROPERTY_ENABLE + 1);

  /* Initialize optional entries.  */
  for (i = ITEM_PROPERTY_DEF; i < ITEM_PROPERTY_ENABLE; i++)
    ASET (item_properties, i, Qnil);
  ASET (item_properties, ITEM_PROPERTY_ENABLE, Qt);

  /* Save the item here to protect it from GC.  */
  ASET (item_properties, ITEM_PROPERTY_ITEM, item);

  item_string = XCAR (item);

  start = item;
  item = XCDR (item);
  if (STRINGP (item_string))
    {
      /* Old format menu item.  */
      ASET (item_properties, ITEM_PROPERTY_NAME, item_string);

      /* Maybe help string.  */
      if (CONSP (item) && STRINGP (XCAR (item)))
	{
	  ASET (item_properties, ITEM_PROPERTY_HELP,
		help_echo_substitute_command_keys (XCAR (item)));
	  start = item;
	  item = XCDR (item);
	}

      /* Maybe an obsolete key binding cache.  */
      if (CONSP (item) && CONSP (XCAR (item))
	  && (NILP (XCAR (XCAR (item)))
	      || VECTORP (XCAR (XCAR (item)))))
	item = XCDR (item);

      /* This is the real definition--the function to run.  */
      ASET (item_properties, ITEM_PROPERTY_DEF, item);

      /* Get enable property, if any.  */
      if (SYMBOLP (item))
	{
	  tem = Fget (item, Qmenu_enable);
	  if (!NILP (Venable_disabled_menus_and_buttons))
	    ASET (item_properties, ITEM_PROPERTY_ENABLE, Qt);
	  else if (!NILP (tem))
	    ASET (item_properties, ITEM_PROPERTY_ENABLE, tem);
	}
    }
  else if (EQ (item_string, Qmenu_item) && CONSP (item))
    {
      /* New format menu item.  */
      ASET (item_properties, ITEM_PROPERTY_NAME, XCAR (item));
      start = XCDR (item);
      if (CONSP (start))
	{
	  /* We have a real binding.  */
	  ASET (item_properties, ITEM_PROPERTY_DEF, XCAR (start));

	  item = XCDR (start);
	  /* Is there an obsolete cache list with key equivalences.  */
	  if (CONSP (item) && CONSP (XCAR (item)))
	    item = XCDR (item);

	  /* Parse properties.  */
	  FOR_EACH_TAIL (item)
	    {
	      tem = XCAR (item);
	      item = XCDR (item);
	      if (!CONSP (item))
		break;

	      if (EQ (tem, QCenable))
		{
		  if (!NILP (Venable_disabled_menus_and_buttons))
		    ASET (item_properties, ITEM_PROPERTY_ENABLE, Qt);
		  else
		    ASET (item_properties, ITEM_PROPERTY_ENABLE, XCAR (item));
		}
	      else if (EQ (tem, QCvisible))
		{
		  /* If got a visible property and that evaluates to nil
		     then ignore this item.  */
		  tem = menu_item_eval_property (XCAR (item));
		  if (NILP (tem))
		    return 0;
	 	}
	      else if (EQ (tem, QChelp))
		{
		  Lisp_Object help = XCAR (item);
		  if (STRINGP (help))
		    help = help_echo_substitute_command_keys (help);
		  ASET (item_properties, ITEM_PROPERTY_HELP, help);
		}
	      else if (EQ (tem, QCfilter))
		filter = item;
	      else if (EQ (tem, QCkey_sequence))
		{
		  tem = XCAR (item);
		  if (SYMBOLP (tem) || STRINGP (tem) || VECTORP (tem))
		    /* Be GC protected. Set keyhint to item instead of tem.  */
		    keyhint = item;
		}
	      else if (EQ (tem, QCkeys))
		{
		  tem = XCAR (item);
		  if (CONSP (tem) || STRINGP (tem))
		    ASET (item_properties, ITEM_PROPERTY_KEYEQ, tem);
		}
	      else if (EQ (tem, QCbutton) && CONSP (XCAR (item)))
		{
		  Lisp_Object type;
		  tem = XCAR (item);
		  type = XCAR (tem);
		  if (EQ (type, QCtoggle) || EQ (type, QCradio))
		    {
		      ASET (item_properties, ITEM_PROPERTY_SELECTED,
			    XCDR (tem));
		      ASET (item_properties, ITEM_PROPERTY_TYPE, type);
		    }
		}
	    }
	}
      else if (inmenubar || !NILP (start))
	return 0;
    }
  else
    return 0;			/* not a menu item */

  /* If item string is not a string, evaluate it to get string.
     If we don't get a string, skip this item.  */
  item_string = AREF (item_properties, ITEM_PROPERTY_NAME);
  if (!(STRINGP (item_string)))
    {
      item_string = menu_item_eval_property (item_string);
      if (!STRINGP (item_string))
	return 0;
      ASET (item_properties, ITEM_PROPERTY_NAME, item_string);
    }

  /* If got a filter apply it on definition.  */
  def = AREF (item_properties, ITEM_PROPERTY_DEF);
  if (!NILP (filter))
    {
      def = menu_item_eval_property (list2 (XCAR (filter),
					    list2 (Qquote, def)));

      ASET (item_properties, ITEM_PROPERTY_DEF, def);
    }

  /* Enable or disable selection of item.  */
  tem = AREF (item_properties, ITEM_PROPERTY_ENABLE);
  if (!EQ (tem, Qt))
    {
      tem = menu_item_eval_property (tem);
      if (inmenubar && NILP (tem))
	return 0;		/* Ignore disabled items in menu bar.  */
      ASET (item_properties, ITEM_PROPERTY_ENABLE, tem);
    }

  /* If we got no definition, this item is just unselectable text which
     is OK in a submenu but not in the menubar.  */
  if (NILP (def))
    return (!inmenubar);

  /* See if this is a separate pane or a submenu.  */
  def = AREF (item_properties, ITEM_PROPERTY_DEF);
  tem = get_keymap (def, 0, 1);
  /* For a subkeymap, just record its details and exit.  */
  if (CONSP (tem))
    {
      ASET (item_properties, ITEM_PROPERTY_MAP, tem);
      ASET (item_properties, ITEM_PROPERTY_DEF, tem);
      return 1;
    }

  /* At the top level in the menu bar, do likewise for commands also.
     The menu bar does not display equivalent key bindings anyway.
     ITEM_PROPERTY_DEF is already set up properly.  */
  if (inmenubar > 0)
    return 1;

  { /* This is a command.  See if there is an equivalent key binding.  */
    Lisp_Object keyeq = AREF (item_properties, ITEM_PROPERTY_KEYEQ);
    AUTO_STRING (space_space, "  ");

    /* The previous code preferred :key-sequence to :keys, so we
       preserve this behavior.  */
    if (STRINGP (keyeq) && !CONSP (keyhint))
      keyeq = concat2 (space_space, call1 (Qsubstitute_command_keys, keyeq));
    else
      {
	Lisp_Object prefix = keyeq;
	Lisp_Object keys = Qnil;

	if (CONSP (prefix))
	  {
	    def = XCAR (prefix);
	    prefix = XCDR (prefix);
	  }
	else
	  def = AREF (item_properties, ITEM_PROPERTY_DEF);

	if (CONSP (keyhint) && !NILP (XCAR (keyhint)))
	  {
	    keys = XCAR (keyhint);
	    tem = Fkey_binding (keys, Qnil, Qnil, Qnil);

	    /* We have a suggested key.  Is it bound to the command?  */
	    if (NILP (tem)
		|| (!EQ (tem, def)
		    /* If the command is an alias for another
		       (such as lmenu.el set it up), check if the
		       original command matches the cached command.  */
		    && !(SYMBOLP (def)
			 && EQ (tem, XSYMBOL (def)->u.s.function))))
	      keys = Qnil;
	  }

	if (NILP (keys))
	  keys = Fwhere_is_internal (def, Qnil, Qt, Qnil, Qnil);

	if (!NILP (keys))
	  {
	    tem = Fkey_description (keys, Qnil);
	    if (CONSP (prefix))
	      {
		if (STRINGP (XCAR (prefix)))
		  tem = concat2 (XCAR (prefix), tem);
		if (STRINGP (XCDR (prefix)))
		  tem = concat2 (tem, XCDR (prefix));
	      }
	    keyeq = concat2 (space_space, tem);
	  }
	else
	  keyeq = Qnil;
      }

    /* If we have an equivalent key binding, use that.  */
    ASET (item_properties, ITEM_PROPERTY_KEYEQ, keyeq);
  }

  /* Include this when menu help is implemented.
  tem = XVECTOR (item_properties)->contents[ITEM_PROPERTY_HELP];
  if (!(NILP (tem) || STRINGP (tem)))
    {
      tem = menu_item_eval_property (tem);
      if (!STRINGP (tem))
	tem = Qnil;
      XVECTOR (item_properties)->contents[ITEM_PROPERTY_HELP] = tem;
    }
  */

  /* Handle radio buttons or toggle boxes.  */
  tem = AREF (item_properties, ITEM_PROPERTY_SELECTED);
  if (!NILP (tem))
    ASET (item_properties, ITEM_PROPERTY_SELECTED,
	  menu_item_eval_property (tem));

  return 1;
}


\f
/***********************************************************************
			       Tab-bars
 ***********************************************************************/

/* A vector holding tab bar items while they are parsed in function
   tab_bar_items. Each item occupies TAB_BAR_ITEM_NSCLOTS elements
   in the vector.  */

static Lisp_Object tab_bar_items_vector;

/* A vector holding the result of parse_tab_bar_item.  Layout is like
   the one for a single item in tab_bar_items_vector.  */

static Lisp_Object tab_bar_item_properties;

/* Next free index in tab_bar_items_vector.  */

static int ntab_bar_items;

/* Function prototypes.  */

static void init_tab_bar_items (Lisp_Object);
static void process_tab_bar_item (Lisp_Object, Lisp_Object, Lisp_Object,
				   void *);
static bool parse_tab_bar_item (Lisp_Object, Lisp_Object);
static void append_tab_bar_item (void);


/* Return a vector of tab bar items for keymaps currently in effect.
   Reuse vector REUSE if non-nil.  Return in *NITEMS the number of
   tab bar items found.  */

Lisp_Object
tab_bar_items (Lisp_Object reuse, int *nitems)
{
  Lisp_Object *maps;
  Lisp_Object mapsbuf[3];
  ptrdiff_t nmaps, i;
  Lisp_Object oquit;
  Lisp_Object *tmaps;
  USE_SAFE_ALLOCA;

  *nitems = 0;

  /* In order to build the menus, we need to call the keymap
     accessors.  They all call maybe_quit.  But this function is called
     during redisplay, during which a quit is fatal.  So inhibit
     quitting while building the menus.  We do this instead of
     specbind because (1) errors will clear it anyway and (2) this
     avoids risk of specpdl overflow.  */
  oquit = Vinhibit_quit;
  Vinhibit_quit = Qt;

  /* Initialize tab_bar_items_vector and protect it from GC.  */
  init_tab_bar_items (reuse);

  /* Build list of keymaps in maps.  Set nmaps to the number of maps
     to process.  */

  /* Should overriding-terminal-local-map and overriding-local-map apply?  */
  if (!NILP (Voverriding_local_map_menu_flag)
      && !NILP (Voverriding_local_map))
    {
      /* Yes, use them (if non-nil) as well as the global map.  */
      maps = mapsbuf;
      nmaps = 0;
      if (!NILP (KVAR (current_kboard, Voverriding_terminal_local_map)))
	maps[nmaps++] = KVAR (current_kboard, Voverriding_terminal_local_map);
      if (!NILP (Voverriding_local_map))
	maps[nmaps++] = Voverriding_local_map;
    }
  else
    {
      /* No, so use major and minor mode keymaps and keymap property.
	 Note that tab-bar bindings in the local-map and keymap
	 properties may not work reliably, as they are only
	 recognized when the tab-bar (or mode-line) is updated,
	 which does not normally happen after every command.  */
      ptrdiff_t nminor = current_minor_maps (NULL, &tmaps);
      SAFE_NALLOCA (maps, 1, nminor + 4);
      nmaps = 0;
      Lisp_Object tem = KVAR (current_kboard, Voverriding_terminal_local_map);
      if (!NILP (tem) && !NILP (Voverriding_local_map_menu_flag))
	maps[nmaps++] = tem;
      if (tem = get_local_map (PT, current_buffer, Qkeymap), !NILP (tem))
	maps[nmaps++] = tem;
      if (nminor != 0)
	{
	  memcpy (maps + nmaps, tmaps, nminor * sizeof (maps[0]));
	  nmaps += nminor;
	}
      maps[nmaps++] = get_local_map (PT, current_buffer, Qlocal_map);
    }

  /* Add global keymap at the end.  */
  maps[nmaps++] = current_global_map;

  /* Process maps in reverse order and look up in each map the prefix
     key `tab-bar'.  */
  for (i = nmaps - 1; i >= 0; --i)
    if (!NILP (maps[i]))
      {
	Lisp_Object keymap;

	keymap = get_keymap (access_keymap (maps[i], Qtab_bar, 1, 0, 1), 0, 1);
	if (CONSP (keymap))
	  map_keymap (keymap, process_tab_bar_item, Qnil, NULL, 1);
      }

  Vinhibit_quit = oquit;
  *nitems = ntab_bar_items / TAB_BAR_ITEM_NSLOTS;
  SAFE_FREE ();
  return tab_bar_items_vector;
}


/* Process the definition of KEY which is DEF.  */

static void
process_tab_bar_item (Lisp_Object key, Lisp_Object def, Lisp_Object data, void *args)
{
  int i;

  if (EQ (def, Qundefined))
    {
      /* If a map has an explicit `undefined' as definition,
	 discard any previously made item.  */
      for (i = 0; i < ntab_bar_items; i += TAB_BAR_ITEM_NSLOTS)
	{
	  Lisp_Object *v = XVECTOR (tab_bar_items_vector)->contents + i;

	  if (EQ (key, v[TAB_BAR_ITEM_KEY]))
	    {
	      if (ntab_bar_items > i + TAB_BAR_ITEM_NSLOTS)
		memmove (v, v + TAB_BAR_ITEM_NSLOTS,
			 ((ntab_bar_items - i - TAB_BAR_ITEM_NSLOTS)
			  * word_size));
	      ntab_bar_items -= TAB_BAR_ITEM_NSLOTS;
	      break;
	    }
	}
    }
  else if (parse_tab_bar_item (key, def))
    /* Append a new tab bar item to tab_bar_items_vector.  Accept
       more than one definition for the same key.  */
    append_tab_bar_item ();
}

/* Access slot with index IDX of vector tab_bar_item_properties.  */
#define PROP(IDX) AREF (tab_bar_item_properties, (IDX))
static void
set_prop_tab_bar (ptrdiff_t idx, Lisp_Object val)
{
  ASET (tab_bar_item_properties, idx, val);
}


/* Parse a tab bar item specification ITEM for key KEY and return the
   result in tab_bar_item_properties.  Value is false if ITEM is
   invalid.

   ITEM is a list `(menu-item CAPTION BINDING PROPS...)'.

   CAPTION is the caption of the item,  If it's not a string, it is
   evaluated to get a string.

   BINDING is the tab bar item's binding.  Tab-bar items with keymaps
   as binding are currently ignored.

   The following properties are recognized:

   - `:enable FORM'.

   FORM is evaluated and specifies whether the tab bar item is
   enabled or disabled.

   - `:visible FORM'

   FORM is evaluated and specifies whether the tab bar item is visible.

   - `:filter FUNCTION'

   FUNCTION is invoked with one parameter `(quote BINDING)'.  Its
   result is stored as the new binding.

   - `:button (TYPE SELECTED)'

   TYPE must be one of `:radio' or `:toggle'.  SELECTED is evaluated
   and specifies whether the button is selected (pressed) or not.

   - `:image IMAGES'

   IMAGES is either a single image specification or a vector of four
   image specifications.  See enum tab_bar_item_images.

   - `:help HELP-STRING'.

   Gives a help string to display for the tab bar item.

   - `:label LABEL-STRING'.

   A text label to show with the tab bar button if labels are enabled.  */

static bool
parse_tab_bar_item (Lisp_Object key, Lisp_Object item)
{
  Lisp_Object filter = Qnil;
  Lisp_Object caption;
  int i;

  /* Definition looks like `(menu-item CAPTION BINDING PROPS...)'.
     Rule out items that aren't lists, don't start with
     `menu-item' or whose rest following `tab-bar-item' is not a
     list.  */
  if (!CONSP (item))
    return 0;

  /* As an exception, allow old-style menu separators.  */
  if (STRINGP (XCAR (item)))
    item = list1 (XCAR (item));
  else if (!EQ (XCAR (item), Qmenu_item)
	   || (item = XCDR (item), !CONSP (item)))
    return 0;

  /* Create tab_bar_item_properties vector if necessary.  Reset it to
     defaults.  */
  if (VECTORP (tab_bar_item_properties))
    {
      for (i = 0; i < TAB_BAR_ITEM_NSLOTS; ++i)
	set_prop_tab_bar (i, Qnil);
    }
  else
    tab_bar_item_properties = make_nil_vector (TAB_BAR_ITEM_NSLOTS);

  /* Set defaults.  */
  set_prop_tab_bar (TAB_BAR_ITEM_KEY, key);
  set_prop_tab_bar (TAB_BAR_ITEM_ENABLED_P, Qt);

  /* Get the caption of the item.  If the caption is not a string,
     evaluate it to get a string.  If we don't get a string, skip this
     item.  */
  caption = XCAR (item);
  if (!STRINGP (caption))
    {
      caption = menu_item_eval_property (caption);
      if (!STRINGP (caption))
	return 0;
    }
  set_prop_tab_bar (TAB_BAR_ITEM_CAPTION, caption);

  /* If the rest following the caption is not a list, the menu item is
     either a separator, or invalid.  */
  item = XCDR (item);
  if (!CONSP (item))
    {
      if (menu_separator_name_p (SSDATA (caption)))
	{
	  set_prop_tab_bar (TAB_BAR_ITEM_ENABLED_P, Qnil);
	  set_prop_tab_bar (TAB_BAR_ITEM_SELECTED_P, Qnil);
	  set_prop_tab_bar (TAB_BAR_ITEM_CAPTION, Qnil);
	  return 1;
	}
      return 0;
    }

  /* Store the binding.  */
  set_prop_tab_bar (TAB_BAR_ITEM_BINDING, XCAR (item));
  item = XCDR (item);

  /* Ignore cached key binding, if any.  */
  if (CONSP (item) && CONSP (XCAR (item)))
    item = XCDR (item);

  /* Process the rest of the properties.  */
  FOR_EACH_TAIL (item)
    {
      Lisp_Object ikey = XCAR (item);
      item = XCDR (item);
      if (!CONSP (item))
	break;
      Lisp_Object value = XCAR (item);

      if (EQ (ikey, QCenable))
	{
	  /* `:enable FORM'.  */
	  if (!NILP (Venable_disabled_menus_and_buttons))
	    set_prop_tab_bar (TAB_BAR_ITEM_ENABLED_P, Qt);
	  else
	    set_prop_tab_bar (TAB_BAR_ITEM_ENABLED_P, value);
	}
      else if (EQ (ikey, QCvisible))
	{
	  /* `:visible FORM'.  If got a visible property and that
	     evaluates to nil then ignore this item.  */
	  if (NILP (menu_item_eval_property (value)))
	    return 0;
	}
      else if (EQ (ikey, QChelp))
        /* `:help HELP-STRING'.  */
        set_prop_tab_bar (TAB_BAR_ITEM_HELP, value);
      else if (EQ (ikey, QCfilter))
	/* ':filter FORM'.  */
	filter = value;
      else if (EQ (ikey, QCbutton) && CONSP (value))
	{
	  /* `:button (TYPE . SELECTED)'.  */
	  Lisp_Object type, selected;

	  type = XCAR (value);
	  selected = XCDR (value);
	  if (EQ (type, QCtoggle) || EQ (type, QCradio))
	    {
	      set_prop_tab_bar (TAB_BAR_ITEM_SELECTED_P, selected);
	    }
	}
    }

  /* If got a filter apply it on binding.  */
  if (!NILP (filter))
    set_prop_tab_bar (TAB_BAR_ITEM_BINDING,
	      (menu_item_eval_property
	       (list2 (filter,
		       list2 (Qquote,
			      PROP (TAB_BAR_ITEM_BINDING))))));

  /* See if the binding is a keymap.  Give up if it is.  */
  if (CONSP (get_keymap (PROP (TAB_BAR_ITEM_BINDING), 0, 1)))
    return 0;

  /* Enable or disable selection of item.  */
  if (!EQ (PROP (TAB_BAR_ITEM_ENABLED_P), Qt))
    set_prop_tab_bar (TAB_BAR_ITEM_ENABLED_P,
	      menu_item_eval_property (PROP (TAB_BAR_ITEM_ENABLED_P)));

  /* Handle radio buttons or toggle boxes.  */
  if (!NILP (PROP (TAB_BAR_ITEM_SELECTED_P)))
    set_prop_tab_bar (TAB_BAR_ITEM_SELECTED_P,
	      menu_item_eval_property (PROP (TAB_BAR_ITEM_SELECTED_P)));

  return 1;

#undef PROP
}


/* Initialize tab_bar_items_vector.  REUSE, if non-nil, is a vector
   that can be reused.  */

static void
init_tab_bar_items (Lisp_Object reuse)
{
  if (VECTORP (reuse))
    tab_bar_items_vector = reuse;
  else
    tab_bar_items_vector = make_nil_vector (64);
  ntab_bar_items = 0;
}


/* Append parsed tab bar item properties from
   tab_bar_item_properties */

static void
append_tab_bar_item (void)
{
  ptrdiff_t incr
    = (ntab_bar_items
       - (ASIZE (tab_bar_items_vector) - TAB_BAR_ITEM_NSLOTS));

  /* Enlarge tab_bar_items_vector if necessary.  */
  if (incr > 0)
    tab_bar_items_vector = larger_vector (tab_bar_items_vector, incr, -1);

  /* Append entries from tab_bar_item_properties to the end of
     tab_bar_items_vector.  */
  vcopy (tab_bar_items_vector, ntab_bar_items,
	 xvector_contents (tab_bar_item_properties), TAB_BAR_ITEM_NSLOTS);
  ntab_bar_items += TAB_BAR_ITEM_NSLOTS;
}




\f
/***********************************************************************
			       Tool-bars
 ***********************************************************************/

/* A vector holding tool bar items while they are parsed in function
   tool_bar_items. Each item occupies TOOL_BAR_ITEM_NSCLOTS elements
   in the vector.  */

static Lisp_Object tool_bar_items_vector;

/* A vector holding the result of parse_tool_bar_item.  Layout is like
   the one for a single item in tool_bar_items_vector.  */

static Lisp_Object tool_bar_item_properties;

/* Next free index in tool_bar_items_vector.  */

static int ntool_bar_items;

/* Function prototypes.  */

static void init_tool_bar_items (Lisp_Object);
static void process_tool_bar_item (Lisp_Object, Lisp_Object, Lisp_Object,
				   void *);
static bool parse_tool_bar_item (Lisp_Object, Lisp_Object);
static void append_tool_bar_item (void);


/* Return a vector of tool bar items for keymaps currently in effect.
   Reuse vector REUSE if non-nil.  Return in *NITEMS the number of
   tool bar items found.  */

Lisp_Object
tool_bar_items (Lisp_Object reuse, int *nitems)
{
  Lisp_Object *maps;
  Lisp_Object mapsbuf[3];
  ptrdiff_t nmaps, i;
  Lisp_Object oquit;
  Lisp_Object *tmaps;
  USE_SAFE_ALLOCA;

  *nitems = 0;

  /* In order to build the menus, we need to call the keymap
     accessors.  They all call maybe_quit.  But this function is called
     during redisplay, during which a quit is fatal.  So inhibit
     quitting while building the menus.  We do this instead of
     specbind because (1) errors will clear it anyway and (2) this
     avoids risk of specpdl overflow.  */
  oquit = Vinhibit_quit;
  Vinhibit_quit = Qt;

  /* Initialize tool_bar_items_vector and protect it from GC.  */
  init_tool_bar_items (reuse);

  /* Build list of keymaps in maps.  Set nmaps to the number of maps
     to process.  */

  /* Should overriding-terminal-local-map and overriding-local-map apply?  */
  if (!NILP (Voverriding_local_map_menu_flag)
      && !NILP (Voverriding_local_map))
    {
      /* Yes, use them (if non-nil) as well as the global map.  */
      maps = mapsbuf;
      nmaps = 0;
      if (!NILP (KVAR (current_kboard, Voverriding_terminal_local_map)))
	maps[nmaps++] = KVAR (current_kboard, Voverriding_terminal_local_map);
      if (!NILP (Voverriding_local_map))
	maps[nmaps++] = Voverriding_local_map;
    }
  else
    {
      /* No, so use major and minor mode keymaps and keymap property.
	 Note that tool-bar bindings in the local-map and keymap
	 properties may not work reliably, as they are only
	 recognized when the tool-bar (or mode-line) is updated,
	 which does not normally happen after every command.  */
      ptrdiff_t nminor = current_minor_maps (NULL, &tmaps);
      SAFE_NALLOCA (maps, 1, nminor + 4);
      nmaps = 0;
      Lisp_Object tem = KVAR (current_kboard, Voverriding_terminal_local_map);
      if (!NILP (tem) && !NILP (Voverriding_local_map_menu_flag))
	maps[nmaps++] = tem;
      if (tem = get_local_map (PT, current_buffer, Qkeymap), !NILP (tem))
	maps[nmaps++] = tem;
      if (nminor != 0)
	{
	  memcpy (maps + nmaps, tmaps, nminor * sizeof (maps[0]));
	  nmaps += nminor;
	}
      maps[nmaps++] = get_local_map (PT, current_buffer, Qlocal_map);
    }

  /* Add global keymap at the end.  */
  maps[nmaps++] = current_global_map;

  /* Process maps in reverse order and look up in each map the prefix
     key `tool-bar'.  */
  for (i = nmaps - 1; i >= 0; --i)
    if (!NILP (maps[i]))
      {
	Lisp_Object keymap;

	keymap = get_keymap (access_keymap (maps[i], Qtool_bar, 1, 0, 1), 0, 1);
	if (CONSP (keymap))
	  map_keymap (keymap, process_tool_bar_item, Qnil, NULL, 1);
      }

  Vinhibit_quit = oquit;
  *nitems = ntool_bar_items / TOOL_BAR_ITEM_NSLOTS;
  SAFE_FREE ();
  return tool_bar_items_vector;
}


/* Process the definition of KEY which is DEF.  */

static void
process_tool_bar_item (Lisp_Object key, Lisp_Object def, Lisp_Object data, void *args)
{
  int i;

  if (EQ (def, Qundefined))
    {
      /* If a map has an explicit `undefined' as definition,
	 discard any previously made item.  */
      for (i = 0; i < ntool_bar_items; i += TOOL_BAR_ITEM_NSLOTS)
	{
	  Lisp_Object *v = XVECTOR (tool_bar_items_vector)->contents + i;

	  if (EQ (key, v[TOOL_BAR_ITEM_KEY]))
	    {
	      if (ntool_bar_items > i + TOOL_BAR_ITEM_NSLOTS)
		memmove (v, v + TOOL_BAR_ITEM_NSLOTS,
			 ((ntool_bar_items - i - TOOL_BAR_ITEM_NSLOTS)
			  * word_size));
	      ntool_bar_items -= TOOL_BAR_ITEM_NSLOTS;
	      break;
	    }
	}
    }
  else if (parse_tool_bar_item (key, def))
    /* Append a new tool bar item to tool_bar_items_vector.  Accept
       more than one definition for the same key.  */
    append_tool_bar_item ();
}

/* Access slot with index IDX of vector tool_bar_item_properties.  */
#define PROP(IDX) AREF (tool_bar_item_properties, (IDX))
static void
set_prop (ptrdiff_t idx, Lisp_Object val)
{
  ASET (tool_bar_item_properties, idx, val);
}


/* Parse a tool bar item specification ITEM for key KEY and return the
   result in tool_bar_item_properties.  Value is false if ITEM is
   invalid.

   ITEM is a list `(menu-item CAPTION BINDING PROPS...)'.

   CAPTION is the caption of the item,  If it's not a string, it is
   evaluated to get a string.

   BINDING is the tool bar item's binding.  Tool-bar items with keymaps
   as binding are currently ignored.

   The following properties are recognized:

   - `:enable FORM'.

   FORM is evaluated and specifies whether the tool bar item is
   enabled or disabled.

   - `:visible FORM'

   FORM is evaluated and specifies whether the tool bar item is visible.

   - `:filter FUNCTION'

   FUNCTION is invoked with one parameter `(quote BINDING)'.  Its
   result is stored as the new binding.

   - `:button (TYPE SELECTED)'

   TYPE must be one of `:radio' or `:toggle'.  SELECTED is evaluated
   and specifies whether the button is selected (pressed) or not.

   - `:image IMAGES'

   IMAGES is either a single image specification or a vector of four
   image specifications.  See enum tool_bar_item_images.

   - `:help HELP-STRING'.

   Gives a help string to display for the tool bar item.

   - `:label LABEL-STRING'.

   A text label to show with the tool bar button if labels are enabled.  */

static bool
parse_tool_bar_item (Lisp_Object key, Lisp_Object item)
{
  Lisp_Object filter = Qnil;
  Lisp_Object caption;
  int i;
  bool have_label = false;

  /* Definition looks like `(menu-item CAPTION BINDING PROPS...)'.
     Rule out items that aren't lists, don't start with
     `menu-item' or whose rest following `tool-bar-item' is not a
     list.  */
  if (!CONSP (item))
    return 0;

  /* As an exception, allow old-style menu separators.  */
  if (STRINGP (XCAR (item)))
    item = list1 (XCAR (item));
  else if (!EQ (XCAR (item), Qmenu_item)
	   || (item = XCDR (item), !CONSP (item)))
    return 0;

  /* Create tool_bar_item_properties vector if necessary.  Reset it to
     defaults.  */
  if (VECTORP (tool_bar_item_properties))
    {
      for (i = 0; i < TOOL_BAR_ITEM_NSLOTS; ++i)
	set_prop (i, Qnil);
    }
  else
    tool_bar_item_properties = make_nil_vector (TOOL_BAR_ITEM_NSLOTS);

  /* Set defaults.  */
  set_prop (TOOL_BAR_ITEM_KEY, key);
  set_prop (TOOL_BAR_ITEM_ENABLED_P, Qt);

  /* Get the caption of the item.  If the caption is not a string,
     evaluate it to get a string.  If we don't get a string, skip this
     item.  */
  caption = XCAR (item);
  if (!STRINGP (caption))
    {
      caption = menu_item_eval_property (caption);
      if (!STRINGP (caption))
	return 0;
    }
  set_prop (TOOL_BAR_ITEM_CAPTION, caption);

  /* If the rest following the caption is not a list, the menu item is
     either a separator, or invalid.  */
  item = XCDR (item);
  if (!CONSP (item))
    {
      if (menu_separator_name_p (SSDATA (caption)))
	{
	  set_prop (TOOL_BAR_ITEM_TYPE, Qt);
#ifndef HAVE_EXT_TOOL_BAR
	  /* If we use build_desired_tool_bar_string to render the
	     tool bar, the separator is rendered as an image.  */
	  set_prop (TOOL_BAR_ITEM_IMAGES,
		    (menu_item_eval_property
		     (Vtool_bar_separator_image_expression)));
	  set_prop (TOOL_BAR_ITEM_ENABLED_P, Qnil);
	  set_prop (TOOL_BAR_ITEM_SELECTED_P, Qnil);
	  set_prop (TOOL_BAR_ITEM_CAPTION, Qnil);
#endif
	  return 1;
	}
      return 0;
    }

  /* Store the binding.  */
  set_prop (TOOL_BAR_ITEM_BINDING, XCAR (item));
  item = XCDR (item);

  /* Ignore cached key binding, if any.  */
  if (CONSP (item) && CONSP (XCAR (item)))
    item = XCDR (item);

  /* Process the rest of the properties.  */
  FOR_EACH_TAIL (item)
    {
      Lisp_Object ikey = XCAR (item);
      item = XCDR (item);
      if (!CONSP (item))
	break;
      Lisp_Object value = XCAR (item);

      if (EQ (ikey, QCenable))
	{
	  /* `:enable FORM'.  */
	  if (!NILP (Venable_disabled_menus_and_buttons))
	    set_prop (TOOL_BAR_ITEM_ENABLED_P, Qt);
	  else
	    set_prop (TOOL_BAR_ITEM_ENABLED_P, value);
	}
      else if (EQ (ikey, QCvisible))
	{
	  /* `:visible FORM'.  If got a visible property and that
	     evaluates to nil then ignore this item.  */
	  if (NILP (menu_item_eval_property (value)))
	    return 0;
	}
      else if (EQ (ikey, QChelp))
        /* `:help HELP-STRING'.  */
        set_prop (TOOL_BAR_ITEM_HELP, value);
      else if (EQ (ikey, QCvert_only))
        /* `:vert-only t/nil'.  */
        set_prop (TOOL_BAR_ITEM_VERT_ONLY, value);
      else if (EQ (ikey, QClabel))
        {
          const char *bad_label = "!!?GARBLED ITEM?!!";
          /* `:label LABEL-STRING'.  */
          set_prop (TOOL_BAR_ITEM_LABEL,
		    STRINGP (value) ? value : build_string (bad_label));
          have_label = true;
        }
      else if (EQ (ikey, QCfilter))
	/* ':filter FORM'.  */
	filter = value;
      else if (EQ (ikey, QCbutton) && CONSP (value))
	{
	  /* `:button (TYPE . SELECTED)'.  */
	  Lisp_Object type, selected;

	  type = XCAR (value);
	  selected = XCDR (value);
	  if (EQ (type, QCtoggle) || EQ (type, QCradio))
	    {
	      set_prop (TOOL_BAR_ITEM_SELECTED_P, selected);
	      set_prop (TOOL_BAR_ITEM_TYPE, type);
	    }
	}
      else if (EQ (ikey, QCimage)
	       && (CONSP (value)
		   || (VECTORP (value) && ASIZE (value) == 4)))
	/* Value is either a single image specification or a vector
	   of 4 such specifications for the different button states.  */
	set_prop (TOOL_BAR_ITEM_IMAGES, value);
      else if (EQ (ikey, QCrtl))
        /* ':rtl STRING' */
	set_prop (TOOL_BAR_ITEM_RTL_IMAGE, value);
    }


  if (!have_label)
    {
      /* Try to make one from caption and key.  */
      Lisp_Object tkey = PROP (TOOL_BAR_ITEM_KEY);
      Lisp_Object tcapt = PROP (TOOL_BAR_ITEM_CAPTION);
      const char *label = SYMBOLP (tkey) ? SSDATA (SYMBOL_NAME (tkey)) : "";
      const char *capt = STRINGP (tcapt) ? SSDATA (tcapt) : "";
      ptrdiff_t max_lbl_size =
	2 * max (0, min (tool_bar_max_label_size, STRING_BYTES_BOUND / 2)) + 1;
      char *buf = xmalloc (max_lbl_size);
      Lisp_Object new_lbl;
      ptrdiff_t caption_len = strnlen (capt, max_lbl_size);

      if (0 < caption_len && caption_len < max_lbl_size)
        {
          strcpy (buf, capt);
          while (caption_len > 0 && buf[caption_len - 1] == '.')
            caption_len--;
	  buf[caption_len] = '\0';
	  label = capt = buf;
        }

      ptrdiff_t label_len = strnlen (label, max_lbl_size);
      if (0 < label_len && label_len < max_lbl_size)
        {
          ptrdiff_t j;
          if (label != buf)
	    strcpy (buf, label);

          for (j = 0; buf[j] != '\0'; ++j)
	    if (buf[j] == '-')
	      buf[j] = ' ';
          label = buf;
        }
      else
	label = "";

      new_lbl = Fupcase_initials (build_string (label));
      if (SCHARS (new_lbl) <= tool_bar_max_label_size)
        set_prop (TOOL_BAR_ITEM_LABEL, new_lbl);
      else
        set_prop (TOOL_BAR_ITEM_LABEL, empty_unibyte_string);
      xfree (buf);
    }

  /* If got a filter apply it on binding.  */
  if (!NILP (filter))
    set_prop (TOOL_BAR_ITEM_BINDING,
	      (menu_item_eval_property
	       (list2 (filter,
		       list2 (Qquote,
			      PROP (TOOL_BAR_ITEM_BINDING))))));

  /* See if the binding is a keymap.  Give up if it is.  */
  if (CONSP (get_keymap (PROP (TOOL_BAR_ITEM_BINDING), 0, 1)))
    return 0;

  /* If there is a key binding, add it to the help, which will be
     displayed as a tooltip for this entry. */
  Lisp_Object binding = PROP (TOOL_BAR_ITEM_BINDING);
  Lisp_Object keys = Fwhere_is_internal (binding, Qnil, Qt, Qnil, Qnil);
  if (!NILP (keys))
    {
      AUTO_STRING (beg, "  (");
      AUTO_STRING (end, ")");
      Lisp_Object orig = PROP (TOOL_BAR_ITEM_HELP);
      Lisp_Object desc = Fkey_description (keys, Qnil);

      if (NILP (orig))
        orig = PROP (TOOL_BAR_ITEM_CAPTION);

      set_prop (TOOL_BAR_ITEM_HELP, CALLN (Fconcat, orig, beg, desc, end));
    }

  /* Enable or disable selection of item.  */
  if (!EQ (PROP (TOOL_BAR_ITEM_ENABLED_P), Qt))
    set_prop (TOOL_BAR_ITEM_ENABLED_P,
	      menu_item_eval_property (PROP (TOOL_BAR_ITEM_ENABLED_P)));

  /* Handle radio buttons or toggle boxes.  */
  if (!NILP (PROP (TOOL_BAR_ITEM_SELECTED_P)))
    set_prop (TOOL_BAR_ITEM_SELECTED_P,
	      menu_item_eval_property (PROP (TOOL_BAR_ITEM_SELECTED_P)));

  return 1;

#undef PROP
}


/* Initialize tool_bar_items_vector.  REUSE, if non-nil, is a vector
   that can be reused.  */

static void
init_tool_bar_items (Lisp_Object reuse)
{
  if (VECTORP (reuse))
    tool_bar_items_vector = reuse;
  else
    tool_bar_items_vector = make_nil_vector (64);
  ntool_bar_items = 0;
}


/* Append parsed tool bar item properties from
   tool_bar_item_properties */

static void
append_tool_bar_item (void)
{
  ptrdiff_t incr
    = (ntool_bar_items
       - (ASIZE (tool_bar_items_vector) - TOOL_BAR_ITEM_NSLOTS));

  /* Enlarge tool_bar_items_vector if necessary.  */
  if (incr > 0)
    tool_bar_items_vector = larger_vector (tool_bar_items_vector, incr, -1);

  /* Append entries from tool_bar_item_properties to the end of
     tool_bar_items_vector.  */
  vcopy (tool_bar_items_vector, ntool_bar_items,
	 xvector_contents (tool_bar_item_properties), TOOL_BAR_ITEM_NSLOTS);
  ntool_bar_items += TOOL_BAR_ITEM_NSLOTS;
}




\f
/* Read a character using menus based on the keymap MAP.
   Return nil if there are no menus in the maps.
   Return t if we displayed a menu but the user rejected it.

   PREV_EVENT is the previous input event, or nil if we are reading
   the first event of a key sequence.

   If USED_MOUSE_MENU is non-null, set *USED_MOUSE_MENU to true
   if we used a mouse menu to read the input, or false otherwise.  If
   USED_MOUSE_MENU is null, don't dereference it.

   The prompting is done based on the prompt-string of the map
   and the strings associated with various map elements.

   This can be done with X menus or with menus put in the minibuf.
   These are done in different ways, depending on how the input will be read.
   Menus using X are done after auto-saving in read-char, getting the input
   event from Fx_popup_menu; menus using the minibuf use read_char recursively
   and do auto-saving in the inner call of read_char.  */

static Lisp_Object
read_char_x_menu_prompt (Lisp_Object map,
			 Lisp_Object prev_event, bool *used_mouse_menu)
{
  if (used_mouse_menu)
    *used_mouse_menu = false;

  /* Use local over global Menu maps.  */

  if (! menu_prompting)
    return Qnil;

  /* If we got to this point via a mouse click,
     use a real menu for mouse selection.  */
  if (EVENT_HAS_PARAMETERS (prev_event)
      && !EQ (XCAR (prev_event), Qmenu_bar)
      && !EQ (XCAR (prev_event), Qtab_bar)
      && !EQ (XCAR (prev_event), Qtool_bar))
    {
      /* Display the menu and get the selection.  */
      Lisp_Object value;

      value = x_popup_menu_1 (prev_event, get_keymap (map, 0, 1));
      if (CONSP (value))
	{
	  Lisp_Object tem;

	  record_menu_key (XCAR (value));

	  /* If we got multiple events, unread all but
	     the first.
	     There is no way to prevent those unread events
	     from showing up later in last_nonmenu_event.
	     So turn symbol and integer events into lists,
	     to indicate that they came from a mouse menu,
	     so that when present in last_nonmenu_event
	     they won't confuse things.  */
	  for (tem = XCDR (value); CONSP (tem); tem = XCDR (tem))
	    {
	      record_menu_key (XCAR (tem));
	      if (SYMBOLP (XCAR (tem))
		  || FIXNUMP (XCAR (tem)))
		XSETCAR (tem, Fcons (XCAR (tem), Qdisabled));
	    }

	  /* If we got more than one event, put all but the first
	     onto this list to be read later.
	     Return just the first event now.  */
	  Vunread_command_events
	    = nconc2 (XCDR (value), Vunread_command_events);
	  value = XCAR (value);
	}
      else if (NILP (value))
	value = Qt;
      if (used_mouse_menu)
	*used_mouse_menu = true;
      return value;
    }
  return Qnil ;
}

static Lisp_Object
read_char_minibuf_menu_prompt (int commandflag,
			       Lisp_Object map)
{
  Lisp_Object name;
  ptrdiff_t nlength;
  /* FIXME: Use the minibuffer's frame width.  */
  ptrdiff_t width = FRAME_COLS (SELECTED_FRAME ()) - 4;
  ptrdiff_t idx = -1;
  bool nobindings = true;
  Lisp_Object rest, vector;
  Lisp_Object prompt_strings = Qnil;

  vector = Qnil;

  if (! menu_prompting)
    return Qnil;

  map = get_keymap (map, 0, 1);
  name = Fkeymap_prompt (map);

  /* If we don't have any menus, just read a character normally.  */
  if (!STRINGP (name))
    return Qnil;

#define PUSH_C_STR(str, listvar) \
  listvar = Fcons (build_unibyte_string (str), listvar)

  /* Prompt string always starts with map's prompt, and a space.  */
  prompt_strings = Fcons (name, prompt_strings);
  PUSH_C_STR (": ", prompt_strings);
  nlength = SCHARS (name) + 2;

  rest = map;

  /* Present the documented bindings, a line at a time.  */
  while (1)
    {
      bool notfirst = false;
      Lisp_Object menu_strings = prompt_strings;
      ptrdiff_t i = nlength;
      Lisp_Object obj;
      Lisp_Object orig_defn_macro;

      /* Loop over elements of map.  */
      while (i < width)
	{
	  Lisp_Object elt;

	  /* FIXME: Use map_keymap to handle new keymap formats.  */

	  /* At end of map, wrap around if just starting,
	     or end this line if already have something on it.  */
	  if (NILP (rest))
	    {
	      if (notfirst || nobindings)
		break;
	      else
		rest = map;
	    }

	  /* Look at the next element of the map.  */
	  if (idx >= 0)
	    elt = AREF (vector, idx);
	  else
	    elt = Fcar_safe (rest);

	  if (idx < 0 && VECTORP (elt))
	    {
	      /* If we found a dense table in the keymap,
		 advanced past it, but start scanning its contents.  */
	      rest = Fcdr_safe (rest);
	      vector = elt;
	      idx = 0;
	    }
	  else
	    {
	      /* An ordinary element.  */
	      Lisp_Object event, tem;

	      if (idx < 0)
		{
		  event = Fcar_safe (elt); /* alist */
		  elt = Fcdr_safe (elt);
		}
	      else
		{
		  XSETINT (event, idx); /* vector */
		}

	      /* Ignore the element if it has no prompt string.  */
	      if (FIXNUMP (event) && parse_menu_item (elt, -1))
		{
		  /* True if the char to type matches the string.  */
		  bool char_matches;
		  Lisp_Object upcased_event, downcased_event;
		  Lisp_Object desc = Qnil;
		  Lisp_Object s
		    = AREF (item_properties, ITEM_PROPERTY_NAME);

		  upcased_event = Fupcase (event);
		  downcased_event = Fdowncase (event);
		  char_matches = (XFIXNUM (upcased_event) == SREF (s, 0)
				  || XFIXNUM (downcased_event) == SREF (s, 0));
		  if (! char_matches)
		    desc = Fsingle_key_description (event, Qnil);

#if 0  /* It is redundant to list the equivalent key bindings because
	  the prefix is what the user has already typed.  */
		  tem
		    = XVECTOR (item_properties)->contents[ITEM_PROPERTY_KEYEQ];
		  if (!NILP (tem))
		    /* Insert equivalent keybinding.  */
		    s = concat2 (s, tem);
#endif
		  tem
		    = AREF (item_properties, ITEM_PROPERTY_TYPE);
		  if (EQ (tem, QCradio) || EQ (tem, QCtoggle))
		    {
		      /* Insert button prefix.  */
		      Lisp_Object selected
			= AREF (item_properties, ITEM_PROPERTY_SELECTED);
		      AUTO_STRING (radio_yes, "(*) ");
		      AUTO_STRING (radio_no , "( ) ");
		      AUTO_STRING (check_yes, "[X] ");
		      AUTO_STRING (check_no , "[ ] ");
		      if (EQ (tem, QCradio))
			tem = NILP (selected) ? radio_yes : radio_no;
		      else
			tem = NILP (selected) ? check_yes : check_no;
		      s = concat2 (tem, s);
		    }


		  /* If we have room for the prompt string, add it to this line.
		     If this is the first on the line, always add it.  */
		  if ((SCHARS (s) + i + 2
		       + (char_matches ? 0 : SCHARS (desc) + 3))
		      < width
		      || !notfirst)
		    {
		      ptrdiff_t thiswidth;

		      /* Punctuate between strings.  */
		      if (notfirst)
			{
			  PUSH_C_STR (", ", menu_strings);
			  i += 2;
			}
		      notfirst = true;
		      nobindings = false;

		      /* If the char to type doesn't match the string's
			 first char, explicitly show what char to type.  */
		      if (! char_matches)
			{
			  /* Add as much of string as fits.  */
			  thiswidth = min (SCHARS (desc), width - i);
			  menu_strings
			    = Fcons (Fsubstring (desc, make_fixnum (0),
						 make_fixnum (thiswidth)),
				     menu_strings);
			  i += thiswidth;
			  PUSH_C_STR (" = ", menu_strings);
			  i += 3;
			}

		      /* Add as much of string as fits.  */
		      thiswidth = min (SCHARS (s), width - i);
		      menu_strings
			= Fcons (Fsubstring (s, make_fixnum (0),
					     make_fixnum (thiswidth)),
				 menu_strings);
		      i += thiswidth;
		    }
		  else
		    {
		      /* If this element does not fit, end the line now,
			 and save the element for the next line.  */
		      PUSH_C_STR ("...", menu_strings);
		      break;
		    }
		}

	      /* Move past this element.  */
	      if (idx >= 0 && idx + 1 >= ASIZE (vector))
		/* Handle reaching end of dense table.  */
		idx = -1;
	      if (idx >= 0)
		idx++;
	      else
		rest = Fcdr_safe (rest);
	    }
	}

      /* Prompt with that and read response.  */
      message3_nolog (apply1 (intern ("concat"), Fnreverse (menu_strings)));

      /* Make believe it's not a keyboard macro in case the help char
	 is pressed.  Help characters are not recorded because menu prompting
	 is not used on replay.  */
      orig_defn_macro = KVAR (current_kboard, defining_kbd_macro);
      kset_defining_kbd_macro (current_kboard, Qnil);
      do
	obj = read_char (commandflag, Qnil, Qt, 0, NULL);
      while (BUFFERP (obj));
      kset_defining_kbd_macro (current_kboard, orig_defn_macro);

      if (!FIXNUMP (obj) || XFIXNUM (obj) == -2
	  || (! EQ (obj, menu_prompt_more_char)
	      && (!FIXNUMP (menu_prompt_more_char)
		  || ! EQ (obj, make_fixnum (Ctl (XFIXNUM (menu_prompt_more_char)))))))
	{
	  if (!NILP (KVAR (current_kboard, defining_kbd_macro)))
	    store_kbd_macro_char (obj);
	  return obj;
	}
      /* Help char - go round again.  */
    }
}
\f
/* Reading key sequences.  */

static Lisp_Object
follow_key (Lisp_Object keymap, Lisp_Object key)
{
  return access_keymap (get_keymap (keymap, 0, 1),
			key, 1, 0, 1);
}

static Lisp_Object
active_maps (Lisp_Object first_event, Lisp_Object second_event)
{
  Lisp_Object position
    = EVENT_HAS_PARAMETERS (first_event) ? EVENT_START (first_event) : Qnil;
  /* The position of a click can be in the second event if the first event
     is a fake_prefixed_key like `header-line` or `mode-line`.  */
  if (SYMBOLP (first_event)
      && EVENT_HAS_PARAMETERS (second_event)
      && EQ (first_event, POSN_POSN (EVENT_START (second_event))))
    {
      eassert (NILP (position));
      position = EVENT_START (second_event);
    }
  return Fcons (Qkeymap, Fcurrent_active_maps (Qt, position));
}

/* Structure used to keep track of partial application of key remapping
   such as Vfunction_key_map and Vkey_translation_map.  */
typedef struct keyremap
{
  /* This is the map originally specified for this use.  */
  Lisp_Object parent;
  /* This is a submap reached by looking up, in PARENT,
     the events from START to END.  */
  Lisp_Object map;
  /* Positions [START, END) in the key sequence buffer
     are the key that we have scanned so far.
     Those events are the ones that we will replace
     if PARENT maps them into a key sequence.  */
  int start, end;
} keyremap;

/* Lookup KEY in MAP.
   MAP is a keymap mapping keys to key vectors or functions.
   If the mapping is a function and DO_FUNCALL is true,
   the function is called with PROMPT as parameter and its return
   value is used as the return value of this function (after checking
   that it is indeed a vector).  */

static Lisp_Object
access_keymap_keyremap (Lisp_Object map, Lisp_Object key, Lisp_Object prompt,
			bool do_funcall)
{
  Lisp_Object next;

  next = access_keymap (map, key, 1, 0, 1);

  /* Handle a symbol whose function definition is a keymap
     or an array.  */
  if (SYMBOLP (next) && !NILP (Ffboundp (next))
      && (ARRAYP (XSYMBOL (next)->u.s.function)
	  || KEYMAPP (XSYMBOL (next)->u.s.function)))
    next = Fautoload_do_load (XSYMBOL (next)->u.s.function, next, Qnil);

  /* If the keymap gives a function, not an
     array, then call the function with one arg and use
     its value instead.  */
  if (do_funcall && FUNCTIONP (next))
    {
      Lisp_Object tem;
      tem = next;

      next = call1 (next, prompt);
      /* If the function returned something invalid,
	 barf--don't ignore it.  */
      if (! (NILP (next) || VECTORP (next) || STRINGP (next)))
	error ("Function %s returns invalid key sequence",
	       SSDATA (SYMBOL_NAME (tem)));
    }
  return next;
}

/* Do one step of the key remapping used for function-key-map and
   key-translation-map:
   KEYBUF is the READ_KEY_ELTS-size buffer holding the input events.
   FKEY is a pointer to the keyremap structure to use.
   INPUT is the index of the last element in KEYBUF.
   DOIT if true says that the remapping can actually take place.
   DIFF is used to return the number of keys added/removed by the remapping.
   PARENT is the root of the keymap.
   PROMPT is the prompt to use if the remapping happens through a function.
   Return true if the remapping actually took place.  */

static bool
keyremap_step (Lisp_Object *keybuf, volatile keyremap *fkey,
	       int input, bool doit, int *diff, Lisp_Object prompt)
{
  Lisp_Object next, key;

  key = keybuf[fkey->end++];

  if (KEYMAPP (fkey->parent))
    next = access_keymap_keyremap (fkey->map, key, prompt, doit);
  else
    next = Qnil;

  /* If keybuf[fkey->start..fkey->end] is bound in the
     map and we're in a position to do the key remapping, replace it with
     the binding and restart with fkey->start at the end.  */
  if ((VECTORP (next) || STRINGP (next)) && doit)
    {
      int len = XFIXNAT (Flength (next));
      int i;

      *diff = len - (fkey->end - fkey->start);

      if (READ_KEY_ELTS - input <= *diff)
	error ("Key sequence too long");

      /* Shift the keys that follow fkey->end.  */
      if (*diff < 0)
	for (i = fkey->end; i < input; i++)
	  keybuf[i + *diff] = keybuf[i];
      else if (*diff > 0)
	for (i = input - 1; i >= fkey->end; i--)
	  keybuf[i + *diff] = keybuf[i];
      /* Overwrite the old keys with the new ones.  */
      for (i = 0; i < len; i++)
	keybuf[fkey->start + i]
	  = Faref (next, make_fixnum (i));

      fkey->start = fkey->end += *diff;
      fkey->map = fkey->parent;

      return 1;
    }

  fkey->map = get_keymap (next, 0, 1);

  /* If we no longer have a bound suffix, try a new position for
     fkey->start.  */
  if (!CONSP (fkey->map))
    {
      fkey->end = ++fkey->start;
      fkey->map = fkey->parent;
    }
  return 0;
}

static bool
test_undefined (Lisp_Object binding)
{
  return (NILP (binding)
	  || EQ (binding, Qundefined)
	  || (SYMBOLP (binding)
	      && EQ (Fcommand_remapping (binding, Qnil, Qnil), Qundefined)));
}

void init_raw_keybuf_count (void)
{
  raw_keybuf_count = 0;
}

/* Read a sequence of keys that ends with a non prefix character,
   storing it in KEYBUF, a buffer of size READ_KEY_ELTS.
   Prompt with PROMPT.
   Return the length of the key sequence stored.
   Return -1 if the user rejected a command menu.

   Echo starting immediately unless `prompt' is 0.

   If PREVENT_REDISPLAY is non-zero, avoid redisplay by calling
   read_char with a suitable COMMANDFLAG argument.

   Where a key sequence ends depends on the currently active keymaps.
   These include any minor mode keymaps active in the current buffer,
   the current buffer's local map, and the global map.

   If a key sequence has no other bindings, we check Vfunction_key_map
   to see if some trailing subsequence might be the beginning of a
   function key's sequence.  If so, we try to read the whole function
   key, and substitute its symbolic name into the key sequence.

   We ignore unbound `down-' mouse clicks.  We turn unbound `drag-' and
   `double-' events into similar click events, if that would make them
   bound.  We try to turn `triple-' events first into `double-' events,
   then into clicks.

   If we get a mouse click in a mode line, vertical divider, or other
   non-text area, we treat the click as if it were prefixed by the
   symbol denoting that area - `mode-line', `vertical-line', or
   whatever.

   If the sequence starts with a mouse click, we read the key sequence
   with respect to the buffer clicked on, not the current buffer.

   If the user switches frames in the midst of a key sequence, we put
   off the switch-frame event until later; the next call to
   read_char will return it.

   If FIX_CURRENT_BUFFER, we restore current_buffer
   from the selected window's buffer.  */

static int
read_key_sequence (Lisp_Object *keybuf, Lisp_Object prompt,
		   bool dont_downcase_last, bool can_return_switch_frame,
		   bool fix_current_buffer, bool prevent_redisplay)
{
  ptrdiff_t count = SPECPDL_INDEX ();

  /* How many keys there are in the current key sequence.  */
  int t;

  /* The length of the echo buffer when we started reading, and
     the length of this_command_keys when we started reading.  */
  ptrdiff_t echo_start UNINIT;
  ptrdiff_t keys_start;

  Lisp_Object current_binding = Qnil;

  /* Index of the first key that has no binding.
     It is useless to try fkey.start larger than that.  */
  int first_unbound;

  /* If t < mock_input, then KEYBUF[t] should be read as the next
     input key.

     We use this to recover after recognizing a function key.  Once we
     realize that a suffix of the current key sequence is actually a
     function key's escape sequence, we replace the suffix with the
     function key's binding from Vfunction_key_map.  Now keybuf
     contains a new and different key sequence, so the echo area,
     this_command_keys, and the submaps and defs arrays are wrong.  In
     this situation, we set mock_input to t, set t to 0, and jump to
     restart_sequence; the loop will read keys from keybuf up until
     mock_input, thus rebuilding the state; and then it will resume
     reading characters from the keyboard.  */
  int mock_input = 0;

  /* Whether each event in the mocked input came from a mouse menu.  */
  bool used_mouse_menu_history[READ_KEY_ELTS] = {0};

  /* If the sequence is unbound in submaps[], then
     keybuf[fkey.start..fkey.end-1] is a prefix in Vfunction_key_map,
     and fkey.map is its binding.

     These might be > t, indicating that all function key scanning
     should hold off until t reaches them.  We do this when we've just
     recognized a function key, to avoid searching for the function
     key's again in Vfunction_key_map.  */
  keyremap fkey;

  /* Likewise, for key_translation_map and input-decode-map.  */
  keyremap keytran, indec;

  /* True if we are trying to map a key by changing an upper-case
     letter to lower case, or a shifted function key to an unshifted
     one.  */
  bool shift_translated = false;

  /* If we receive a `switch-frame' or `select-window' event in the middle of
     a key sequence, we put it off for later.
     While we're reading, we keep the event here.  */
  Lisp_Object delayed_switch_frame;

  Lisp_Object original_uppercase UNINIT;
  int original_uppercase_position = -1;

  /* Gets around Microsoft compiler limitations.  */
  bool dummyflag = false;

  struct buffer *starting_buffer;

  /* List of events for which a fake prefix key has been generated.  */
  Lisp_Object fake_prefixed_keys = Qnil;

  /* raw_keybuf_count is now initialized in (most of) the callers of
     read_key_sequence.  This is so that in a recursive call (for
     mouse menus) a spurious initialization doesn't erase the contents
     of raw_keybuf created by the outer call.  */
  /* raw_keybuf_count = 0; */

  delayed_switch_frame = Qnil;

  if (INTERACTIVE)
    {
      if (!NILP (prompt))
	{
	  /* Install the string PROMPT as the beginning of the string
	     of echoing, so that it serves as a prompt for the next
	     character.  */
	  kset_echo_prompt (current_kboard, prompt);
          /* FIXME: This use of echo_now doesn't look quite right and is ugly
             since it forces us to fiddle with current_kboard->immediate_echo
             before and after.  */
	  current_kboard->immediate_echo = false;
	  echo_now ();
          if (!echo_keystrokes_p ())
	    current_kboard->immediate_echo = false;
	}
      else if (cursor_in_echo_area /* FIXME: Not sure why we test this here,
                                      maybe we should just drop this test.  */
	       && echo_keystrokes_p ())
	/* This doesn't put in a dash if the echo buffer is empty, so
	   you don't always see a dash hanging out in the minibuffer.  */
	echo_dash ();
    }

  /* Record the initial state of the echo area and this_command_keys;
     we will need to restore them if we replay a key sequence.  */
  if (INTERACTIVE)
    echo_start = echo_length ();
  keys_start = this_command_key_count;
  this_single_command_key_start = keys_start;

  /* We jump here when we need to reinitialize fkey and keytran; this
     happens if we switch keyboards between rescans.  */
 replay_entire_sequence:

  indec.map = indec.parent = KVAR (current_kboard, Vinput_decode_map);
  fkey.map = fkey.parent = KVAR (current_kboard, Vlocal_function_key_map);
  keytran.map = keytran.parent = Vkey_translation_map;
  indec.start = indec.end = 0;
  fkey.start = fkey.end = 0;
  keytran.start = keytran.end = 0;

  /* We jump here when the key sequence has been thoroughly changed, and
     we need to rescan it starting from the beginning.  When we jump here,
     keybuf[0..mock_input] holds the sequence we should reread.  */
 replay_sequence:

  starting_buffer = current_buffer;
  first_unbound = READ_KEY_ELTS + 1;
  Lisp_Object first_event = mock_input > 0 ? keybuf[0] : Qnil;
  Lisp_Object second_event = mock_input > 1 ? keybuf[1] : Qnil;

  /* Build our list of keymaps.
     If we recognize a function key and replace its escape sequence in
     keybuf with its symbol, or if the sequence starts with a mouse
     click and we need to switch buffers, we jump back here to rebuild
     the initial keymaps from the current buffer.  */
  current_binding = active_maps (first_event, second_event);

  /* Start from the beginning in keybuf.  */
  t = 0;
  last_nonmenu_event = Qnil;

  /* These are no-ops the first time through, but if we restart, they
     revert the echo area and this_command_keys to their original state.  */
  this_command_key_count = keys_start;
  if (INTERACTIVE && t < mock_input)
    echo_truncate (echo_start);

  /* If the best binding for the current key sequence is a keymap, or
     we may be looking at a function key's escape sequence, keep on
     reading.  */
  while (!NILP (current_binding)
	 /* Keep reading as long as there's a prefix binding.  */
	 ? KEYMAPP (current_binding)
	 /* Don't return in the middle of a possible function key sequence,
	    if the only bindings we found were via case conversion.
	    Thus, if ESC O a has a function-key-map translation
	    and ESC o has a binding, don't return after ESC O,
	    so that we can translate ESC O plus the next character.  */
	 : (/* indec.start < t || fkey.start < t || */ keytran.start < t))
    {
      Lisp_Object key;
      bool used_mouse_menu = false;

      /* Where the last real key started.  If we need to throw away a
         key that has expanded into more than one element of keybuf
         (say, a mouse click on the mode line which is being treated
         as [mode-line (mouse-...)], then we backtrack to this point
         of keybuf.  */
      int last_real_key_start;

      /* These variables are analogous to echo_start and keys_start;
	 while those allow us to restart the entire key sequence,
	 echo_local_start and keys_local_start allow us to throw away
	 just one key.  */
      ptrdiff_t echo_local_start UNINIT;
      int keys_local_start;
      Lisp_Object new_binding;

      eassert (indec.end == t || (indec.end > t && indec.end <= mock_input));
      eassert (indec.start <= indec.end);
      eassert (fkey.start <= fkey.end);
      eassert (keytran.start <= keytran.end);
      /* key-translation-map is applied *after* function-key-map
	 which is itself applied *after* input-decode-map.  */
      eassert (fkey.end <= indec.start);
      eassert (keytran.end <= fkey.start);

      if (/* first_unbound < indec.start && first_unbound < fkey.start && */
	  first_unbound < keytran.start)
	{ /* The prefix upto first_unbound has no binding and has
	     no translation left to do either, so we know it's unbound.
	     If we don't stop now, we risk staying here indefinitely
	     (if the user keeps entering fkey or keytran prefixes
	     like C-c ESC ESC ESC ESC ...)  */
	  int i;
	  for (i = first_unbound + 1; i < t; i++)
	    keybuf[i - first_unbound - 1] = keybuf[i];
	  mock_input = t - first_unbound - 1;
	  indec.end = indec.start -= first_unbound + 1;
	  indec.map = indec.parent;
	  fkey.end = fkey.start -= first_unbound + 1;
	  fkey.map = fkey.parent;
	  keytran.end = keytran.start -= first_unbound + 1;
	  keytran.map = keytran.parent;
	  goto replay_sequence;
	}

      if (t >= READ_KEY_ELTS)
	error ("Key sequence too long");

      if (INTERACTIVE)
	echo_local_start = echo_length ();
      keys_local_start = this_command_key_count;

    replay_key:
      /* These are no-ops, unless we throw away a keystroke below and
	 jumped back up to replay_key; in that case, these restore the
	 variables to their original state, allowing us to replay the
	 loop.  */
      if (INTERACTIVE && t < mock_input)
	echo_truncate (echo_local_start);
      this_command_key_count = keys_local_start;

      /* By default, assume each event is "real".  */
      last_real_key_start = t;

      /* Does mock_input indicate that we are re-reading a key sequence?  */
      if (t < mock_input)
	{
	  key = keybuf[t];
	  add_command_key (key);
	  if (current_kboard->immediate_echo)
	    {
	      /* Set immediate_echo to false so as to force echo_now to
		 redisplay (it will set immediate_echo right back to true).  */
	      current_kboard->immediate_echo = false;
	      echo_now ();
	    }
	  used_mouse_menu = used_mouse_menu_history[t];
	}

      /* If not, we should actually read a character.  */
      else
	{
	  {
	    KBOARD *interrupted_kboard = current_kboard;
	    struct frame *interrupted_frame = SELECTED_FRAME ();
	    /* Calling read_char with COMMANDFLAG = -2 avoids
	       redisplay in read_char and its subroutines.  */
	    key = read_char (prevent_redisplay ? -2 : NILP (prompt),
		             current_binding, last_nonmenu_event,
                             &used_mouse_menu, NULL);
	    used_mouse_menu_history[t] = used_mouse_menu;
	    if ((FIXNUMP (key) && XFIXNUM (key) == -2) /* wrong_kboard_jmpbuf */
		/* When switching to a new tty (with a new keyboard),
		   read_char returns the new buffer, rather than -2
		   (Bug#5095).  This is because `terminal-init-xterm'
		   calls read-char, which eats the wrong_kboard_jmpbuf
		   return.  Any better way to fix this? -- cyd  */
		|| (interrupted_kboard != current_kboard))
	      {
		bool found = false;
		struct kboard *k;

		for (k = all_kboards; k; k = k->next_kboard)
		  if (k == interrupted_kboard)
		    found = true;

		if (!found)
		  {
		    /* Don't touch interrupted_kboard when it's been
		       deleted.  */
		    delayed_switch_frame = Qnil;
		    goto replay_entire_sequence;
		  }

		if (!NILP (delayed_switch_frame))
		  {
		    kset_kbd_queue
		      (interrupted_kboard,
		       Fcons (delayed_switch_frame,
			      KVAR (interrupted_kboard, kbd_queue)));
		    delayed_switch_frame = Qnil;
		  }

		while (t > 0)
		  kset_kbd_queue
		    (interrupted_kboard,
		     Fcons (keybuf[--t], KVAR (interrupted_kboard, kbd_queue)));

		/* If the side queue is non-empty, ensure it begins with a
		   switch-frame, so we'll replay it in the right context.  */
		if (CONSP (KVAR (interrupted_kboard, kbd_queue))
		    && (key = XCAR (KVAR (interrupted_kboard, kbd_queue)),
			!(EVENT_HAS_PARAMETERS (key)
			  && EQ (EVENT_HEAD_KIND (EVENT_HEAD (key)),
				 Qswitch_frame))))
		  {
		    Lisp_Object frame;
		    XSETFRAME (frame, interrupted_frame);
		    kset_kbd_queue
		      (interrupted_kboard,
		       Fcons (make_lispy_switch_frame (frame),
			      KVAR (interrupted_kboard, kbd_queue)));
                   mock_input = 0;
                 }
               else
                 {
                   if (FIXNUMP (key) && XFIXNUM (key) != -2)
                     {
                       /* If interrupted while initializing terminal, we
                          need to replay the interrupting key.  See
                          Bug#5095 and Bug#37782.  */
                       mock_input = 1;
                       keybuf[0] = key;
                     }
                   else
                     {
                       mock_input = 0;
                     }
		  }
		goto replay_entire_sequence;
	      }
	  }

	  /* read_char returns t when it shows a menu and the user rejects it.
	     Just return -1.  */
	  if (EQ (key, Qt))
	    {
	      unbind_to (count, Qnil);
	      return -1;
	    }

	  /* read_char returns -1 at the end of a macro.
	     Emacs 18 handles this by returning immediately with a
	     zero, so that's what we'll do.  */
	  if (FIXNUMP (key) && XFIXNUM (key) == -1)
	    {
	      t = 0;
	      /* The Microsoft C compiler can't handle the goto that
		 would go here.  */
	      dummyflag = true;
	      break;
	    }

	  /* If the current buffer has been changed from under us, the
	     keymap may have changed, so replay the sequence.  */
	  if (BUFFERP (key))
	    {
	      timer_resume_idle ();

	      mock_input = t;
	      /* Reset the current buffer from the selected window
		 in case something changed the former and not the latter.
		 This is to be more consistent with the behavior
		 of the command_loop_1.  */
	      if (fix_current_buffer)
		{
		  if (! FRAME_LIVE_P (XFRAME (selected_frame)))
		    Fkill_emacs (Qnil);
		  if (XBUFFER (XWINDOW (selected_window)->contents)
		      != current_buffer)
		    Fset_buffer (XWINDOW (selected_window)->contents);
		}

	      goto replay_sequence;
	    }

	  /* If we have a quit that was typed in another frame, and
	     quit_throw_to_read_char switched buffers,
	     replay to get the right keymap.  */
	  if (FIXNUMP (key)
	      && XFIXNUM (key) == quit_char
	      && current_buffer != starting_buffer)
	    {
	      GROW_RAW_KEYBUF;
	      ASET (raw_keybuf, raw_keybuf_count, key);
	      raw_keybuf_count++;
	      keybuf[t++] = key;
	      mock_input = t;
	      Vquit_flag = Qnil;
	      goto replay_sequence;
	    }

	  Vquit_flag = Qnil;

	  if (EVENT_HAS_PARAMETERS (key)
	      /* Either a `switch-frame' or a `select-window' event.  */
	      && EQ (EVENT_HEAD_KIND (EVENT_HEAD (key)), Qswitch_frame))
	    {
	      /* If we're at the beginning of a key sequence, and the caller
		 says it's okay, go ahead and return this event.  If we're
		 in the midst of a key sequence, delay it until the end.  */
	      if (t > 0 || !can_return_switch_frame)
		{
		  delayed_switch_frame = key;
		  goto replay_key;
		}
	    }

	  if (NILP (first_event))
	    {
	      first_event = key;
	      /* Even if first_event does not specify a particular
		 window/position, it's important to recompute the maps here
		 since a long time might have passed since we entered
		 read_key_sequence, and a timer (or process-filter or
		 special-event-map, ...) might have switched the current buffer
		 or the selected window from under us in the mean time.  */
	      if (fix_current_buffer
		  && (XBUFFER (XWINDOW (selected_window)->contents)
		      != current_buffer))
		Fset_buffer (XWINDOW (selected_window)->contents);
	      current_binding = active_maps (first_event, Qnil);
	    }

	  GROW_RAW_KEYBUF;
	  ASET (raw_keybuf, raw_keybuf_count,
                /* Copy the event, in case it gets modified by side-effect
                   by some remapping function (bug#30955).  */
                CONSP (key) ? Fcopy_sequence (key) : key);
	  raw_keybuf_count++;
	}

      /* Clicks in non-text areas get prefixed by the symbol
	 in their CHAR-ADDRESS field.  For example, a click on
	 the mode line is prefixed by the symbol `mode-line'.

	 Furthermore, key sequences beginning with mouse clicks
	 are read using the keymaps of the buffer clicked on, not
	 the current buffer.  So we may have to switch the buffer
	 here.

	 When we turn one event into two events, we must make sure
	 that neither of the two looks like the original--so that,
	 if we replay the events, they won't be expanded again.
	 If not for this, such reexpansion could happen either here
	 or when user programs play with this-command-keys.  */
      if (EVENT_HAS_PARAMETERS (key))
	{
	  Lisp_Object kind = EVENT_HEAD_KIND (EVENT_HEAD (key));
	  if (EQ (kind, Qmouse_click))
	    {
	      Lisp_Object window = POSN_WINDOW (EVENT_START (key));
	      Lisp_Object posn = POSN_POSN (EVENT_START (key));

	      if (CONSP (posn)
		  || (!NILP (fake_prefixed_keys)
		      && !NILP (Fmemq (key, fake_prefixed_keys))))
		{
		  /* We're looking a second time at an event for which
		     we generated a fake prefix key.  Set
		     last_real_key_start appropriately.  */
		  if (t > 0)
		    last_real_key_start = t - 1;
		}

	      if (last_real_key_start == 0)
		{
		  /* Key sequences beginning with mouse clicks are
		     read using the keymaps in the buffer clicked on,
		     not the current buffer.  If we're at the
		     beginning of a key sequence, switch buffers.  */
		  if (WINDOWP (window)
		      && BUFFERP (XWINDOW (window)->contents)
		      && XBUFFER (XWINDOW (window)->contents) != current_buffer)
		    {
		      keybuf[t] = key;
		      mock_input = t + 1;

		      /* Arrange to go back to the original buffer once we're
			 done reading the key sequence.  Note that we can't
			 use save_excursion_{save,restore} here, because they
			 save point as well as the current buffer; we don't
			 want to save point, because redisplay may change it,
			 to accommodate a Fset_window_start or something.  We
			 don't want to do this at the top of the function,
			 because we may get input from a subprocess which
			 wants to change the selected window and stuff (say,
			 emacsclient).  */
		      record_unwind_current_buffer ();

		      if (! FRAME_LIVE_P (XFRAME (selected_frame)))
			Fkill_emacs (Qnil);
		      set_buffer_internal (XBUFFER (XWINDOW (window)->contents));
		      goto replay_sequence;
		    }
		}

	      /* Expand mode-line and scroll-bar events into two events:
		 use posn as a fake prefix key.  */
	      if (SYMBOLP (posn)
		  && (NILP (fake_prefixed_keys)
		      || NILP (Fmemq (key, fake_prefixed_keys))))
		{
		  if (READ_KEY_ELTS - t <= 1)
		    error ("Key sequence too long");

		  keybuf[t]     = posn;
		  keybuf[t + 1] = key;
		  mock_input    = t + 2;

		  /* Record that a fake prefix key has been generated
		     for KEY.  Don't modify the event; this would
		     prevent proper action when the event is pushed
		     back into unread-command-events.  */
		  fake_prefixed_keys = Fcons (key, fake_prefixed_keys);
		  goto replay_key;
		}
	    }
	  else if (CONSP (XCDR (key))
		   && CONSP (xevent_start (key))
		   && CONSP (XCDR (xevent_start (key))))
	    {
	      Lisp_Object posn;

	      posn = POSN_POSN (xevent_start (key));
	      /* Handle menu-bar events:
		 insert the dummy prefix event `menu-bar'.  */
	      if (EQ (posn, Qmenu_bar) || EQ (posn, Qtab_bar) || EQ (posn, Qtool_bar))
		{
		  if (READ_KEY_ELTS - t <= 1)
		    error ("Key sequence too long");
		  keybuf[t] = posn;
		  keybuf[t + 1] = key;

		  /* Zap the position in key, so we know that we've
		     expanded it, and don't try to do so again.  */
		  POSN_SET_POSN (xevent_start (key), list1 (posn));

		  mock_input = t + 2;
		  goto replay_sequence;
		}
	      else if (CONSP (posn))
		{
		  /* We're looking at the second event of a
		     sequence which we expanded before.  Set
		     last_real_key_start appropriately.  */
		  if (last_real_key_start == t && t > 0)
		    last_real_key_start = t - 1;
		}
	    }
	}

      /* We have finally decided that KEY is something we might want
	 to look up.  */
      new_binding = follow_key (current_binding, key);

      /* If KEY wasn't bound, we'll try some fallbacks.  */
      if (!NILP (new_binding))
	/* This is needed for the following scenario:
	   event 0: a down-event that gets dropped by calling replay_key.
	   event 1: some normal prefix like C-h.
	   After event 0, first_unbound is 0, after event 1 indec.start,
	   fkey.start, and keytran.start are all 1, so when we see that
	   C-h is bound, we need to update first_unbound.  */
	first_unbound = max (t + 1, first_unbound);
      else
	{
	  Lisp_Object head;

	  /* Remember the position to put an upper bound on indec.start.  */
	  first_unbound = min (t, first_unbound);

	  head = EVENT_HEAD (key);

	  if (SYMBOLP (head))
	    {
	      Lisp_Object breakdown;
	      int modifiers;

	      breakdown = parse_modifiers (head);
	      modifiers = XFIXNUM (XCAR (XCDR (breakdown)));
	      /* Attempt to reduce an unbound mouse event to a simpler
		 event that is bound:
		   Drags reduce to clicks.
		   Double-clicks reduce to clicks.
		   Triple-clicks reduce to double-clicks, then to clicks.
		   Up/Down-clicks are eliminated.
		   Double-downs reduce to downs, then are eliminated.
		   Triple-downs reduce to double-downs, then to downs,
		     then are eliminated.  */
	      if (modifiers & (up_modifier | down_modifier
			       | drag_modifier
			       | double_modifier | triple_modifier))
		{
		  while (modifiers & (up_modifier | down_modifier
				      | drag_modifier
				      | double_modifier | triple_modifier))
		    {
		      Lisp_Object new_head, new_click;
		      if (modifiers & triple_modifier)
			modifiers ^= (double_modifier | triple_modifier);
		      else if (modifiers & double_modifier)
			modifiers &= ~double_modifier;
		      else if (modifiers & drag_modifier)
			modifiers &= ~drag_modifier;
		      else
			{
			  /* Dispose of this `up/down' event by simply jumping
			     back to replay_key, to get another event.

			     Note that if this event came from mock input,
			     then just jumping back to replay_key will just
			     hand it to us again.  So we have to wipe out any
			     mock input.

			     We could delete keybuf[t] and shift everything
			     after that to the left by one spot, but we'd also
			     have to fix up any variable that points into
			     keybuf, and shifting isn't really necessary
			     anyway.

			     Adding prefixes for non-textual mouse clicks
			     creates two characters of mock input, and both
			     must be thrown away.  If we're only looking at
			     the prefix now, we can just jump back to
			     replay_key.  On the other hand, if we've already
			     processed the prefix, and now the actual click
			     itself is giving us trouble, then we've lost the
			     state of the keymaps we want to backtrack to, and
			     we need to replay the whole sequence to rebuild
			     it.

			     Beyond that, only function key expansion could
			     create more than two keys, but that should never
			     generate mouse events, so it's okay to zero
			     mock_input in that case too.

			     FIXME: The above paragraph seems just plain
			     wrong, if you consider things like
			     xterm-mouse-mode.  -stef

			     Isn't this just the most wonderful code ever?  */

			  /* If mock_input > t + 1, the above simplification
			     will actually end up dropping keys on the floor.
			     This is probably OK for now, but even
			     if mock_input <= t + 1, we need to adjust indec,
			     fkey, and keytran.
			     Typical case [header-line down-mouse-N]:
			     mock_input = 2, t = 1, fkey.end = 1,
			     last_real_key_start = 0.  */
			  if (indec.end > last_real_key_start)
			    {
			      indec.end = indec.start
				= min (last_real_key_start, indec.start);
			      indec.map = indec.parent;
			      if (fkey.end > last_real_key_start)
				{
				  fkey.end = fkey.start
				    = min (last_real_key_start, fkey.start);
				  fkey.map = fkey.parent;
				  if (keytran.end > last_real_key_start)
				    {
				      keytran.end = keytran.start
					= min (last_real_key_start, keytran.start);
				      keytran.map = keytran.parent;
				    }
				}
			    }
			  if (t == last_real_key_start)
			    {
			      mock_input = 0;
			      goto replay_key;
			    }
			  else
			    {
			      mock_input = last_real_key_start;
			      goto replay_sequence;
			    }
			}

		      new_head
			= apply_modifiers (modifiers, XCAR (breakdown));
		      new_click = list2 (new_head, EVENT_START (key));

		      /* Look for a binding for this new key.  */
		      new_binding = follow_key (current_binding, new_click);

		      /* If that click is bound, go for it.  */
		      if (!NILP (new_binding))
			{
			  current_binding = new_binding;
			  key = new_click;
			  break;
			}
		      /* Otherwise, we'll leave key set to the drag event.  */
		    }
		}
	    }
	}
      current_binding = new_binding;

      keybuf[t++] = key;
      /* Normally, last_nonmenu_event gets the previous key we read.
	 But when a mouse popup menu is being used,
	 we don't update last_nonmenu_event; it continues to hold the mouse
	 event that preceded the first level of menu.  */
      if (!used_mouse_menu)
	last_nonmenu_event = key;

      /* Record what part of this_command_keys is the current key sequence.  */
      this_single_command_key_start = this_command_key_count - t;
      /* When 'input-method-function' called above causes events to be
	 put on 'unread-post-input-method-events', and as result
	 'reread' is set to 'true', the value of 't' can become larger
	 than 'this_command_key_count', because 'add_command_key' is
	 not called to update 'this_command_key_count'.  If this
	 happens, 'this_single_command_key_start' will become negative
	 above, and any call to 'this-single-command-keys' will return
	 a garbled vector.  See bug #20223 for one such situation.
	 Here we force 'this_single_command_key_start' to never become
	 negative, to avoid that.  */
      if (this_single_command_key_start < 0)
	this_single_command_key_start = 0;

      /* Look for this sequence in input-decode-map.
	 Scan from indec.end until we find a bound suffix.  */
      while (indec.end < t)
	{
	  bool done;
	  int diff;

	  done = keyremap_step (keybuf, &indec, max (t, mock_input),
				true, &diff, prompt);
	  if (done)
	    {
	      mock_input = diff + max (t, mock_input);
	      goto replay_sequence;
	    }
	}

      if (!KEYMAPP (current_binding)
	  && !test_undefined (current_binding)
	  && indec.start >= t)
	/* There is a binding and it's not a prefix.
	   (and it doesn't have any input-decode-map translation pending).
	   There is thus no function-key in this sequence.
	   Moving fkey.start is important in this case to allow keytran.start
	   to go over the sequence before we return (since we keep the
	   invariant that keytran.end <= fkey.start).  */
	{
	  if (fkey.start < t)
	    (fkey.start = fkey.end = t, fkey.map = fkey.parent);
	}
      else
	/* If the sequence is unbound, see if we can hang a function key
	   off the end of it.  */
	/* Continue scan from fkey.end until we find a bound suffix.  */
	while (fkey.end < indec.start)
	  {
	    bool done;
	    int diff;

	    done = keyremap_step (keybuf, &fkey,
				  max (t, mock_input),
				  /* If there's a binding (i.e.
				     first_binding >= nmaps) we don't want
				     to apply this function-key-mapping.  */
				  (fkey.end + 1 == t
				   && test_undefined (current_binding)),
				  &diff, prompt);
	    if (done)
	      {
		mock_input = diff + max (t, mock_input);
		/* Adjust the input-decode-map counters.  */
		indec.end += diff;
		indec.start += diff;

		goto replay_sequence;
	      }
	  }

      /* Look for this sequence in key-translation-map.
	 Scan from keytran.end until we find a bound suffix.  */
      while (keytran.end < fkey.start)
	{
	  bool done;
	  int diff;

	  done = keyremap_step (keybuf, &keytran, max (t, mock_input),
				true, &diff, prompt);
	  if (done)
	    {
	      mock_input = diff + max (t, mock_input);
	      /* Adjust the function-key-map and input-decode-map counters.  */
	      indec.end += diff;
	      indec.start += diff;
	      fkey.end += diff;
	      fkey.start += diff;

	      goto replay_sequence;
	    }
	}

      /* If KEY is not defined in any of the keymaps,
	 and cannot be part of a function key or translation,
	 and is an upper case letter
	 use the corresponding lower-case letter instead.  */
      if (NILP (current_binding)
	  && /* indec.start >= t && fkey.start >= t && */ keytran.start >= t
	  && FIXNUMP (key))
	{
	  Lisp_Object new_key;
	  EMACS_INT k = XFIXNUM (key);

	  if (k & shift_modifier)
	    XSETINT (new_key, k & ~shift_modifier);
	  else if (CHARACTERP (make_fixnum (k & ~CHAR_MODIFIER_MASK)))
	    {
	      int dc = downcase (k & ~CHAR_MODIFIER_MASK);
	      if (dc == (k & ~CHAR_MODIFIER_MASK))
		goto not_upcase;
	      XSETINT (new_key, dc | (k & CHAR_MODIFIER_MASK));
	    }
	  else
	    goto not_upcase;

	  original_uppercase = key;
	  original_uppercase_position = t - 1;

	  /* We have to do this unconditionally, regardless of whether
	     the lower-case char is defined in the keymaps, because they
	     might get translated through function-key-map.  */
	  keybuf[t - 1] = new_key;
	  mock_input = max (t, mock_input);
	  shift_translated = true;

	  goto replay_sequence;
	}

    not_upcase:
      if (NILP (current_binding)
	  && help_char_p (EVENT_HEAD (key)) && t > 1)
	    {
	      read_key_sequence_cmd = Vprefix_help_command;
	      /* The Microsoft C compiler can't handle the goto that
		 would go here.  */
	      dummyflag = true;
	      break;
	    }

      /* If KEY is not defined in any of the keymaps,
	 and cannot be part of a function key or translation,
	 and is a shifted function key,
	 use the corresponding unshifted function key instead.  */
      if (NILP (current_binding)
	  && /* indec.start >= t && fkey.start >= t && */ keytran.start >= t)
	{
	  Lisp_Object breakdown = parse_modifiers (key);
	  int modifiers
	    = CONSP (breakdown) ? (XFIXNUM (XCAR (XCDR (breakdown)))) : 0;

	  if (modifiers & shift_modifier
	      /* Treat uppercase keys as shifted.  */
	      || (FIXNUMP (key)
		  && (KEY_TO_CHAR (key)
		      < XCHAR_TABLE (BVAR (current_buffer, downcase_table))->header.size)
		  && uppercasep (KEY_TO_CHAR (key))))
	    {
	      Lisp_Object new_key
		= (modifiers & shift_modifier
		   ? apply_modifiers (modifiers & ~shift_modifier,
				      XCAR (breakdown))
		   : make_fixnum (downcase (KEY_TO_CHAR (key)) | modifiers));

	      original_uppercase = key;
	      original_uppercase_position = t - 1;

	      /* We have to do this unconditionally, regardless of whether
		 the lower-case char is defined in the keymaps, because they
		 might get translated through function-key-map.  */
	      keybuf[t - 1] = new_key;
	      mock_input = max (t, mock_input);
	      /* Reset fkey (and consequently keytran) to apply
		 function-key-map on the result, so that S-backspace is
		 correctly mapped to DEL (via backspace).  OTOH,
		 input-decode-map doesn't need to go through it again.  */
	      fkey.start = fkey.end = 0;
	      keytran.start = keytran.end = 0;
	      shift_translated = true;

	      goto replay_sequence;
	    }
	}
    }
  if (!dummyflag)
    read_key_sequence_cmd = current_binding;
  read_key_sequence_remapped
    /* Remap command through active keymaps.
       Do the remapping here, before the unbind_to so it uses the keymaps
       of the appropriate buffer.  */
    = SYMBOLP (read_key_sequence_cmd)
    ? Fcommand_remapping (read_key_sequence_cmd, Qnil, Qnil)
    : Qnil;

  unread_switch_frame = delayed_switch_frame;
  unbind_to (count, Qnil);

  /* Don't downcase the last character if the caller says don't.
     Don't downcase it if the result is undefined, either.  */
  if ((dont_downcase_last || NILP (current_binding))
      && t > 0
      && t - 1 == original_uppercase_position)
    {
      keybuf[t - 1] = original_uppercase;
      shift_translated = false;
    }

  if (shift_translated)
    Vthis_command_keys_shift_translated = Qt;

  /* Occasionally we fabricate events, perhaps by expanding something
     according to function-key-map, or by adding a prefix symbol to a
     mouse click in the scroll bar or modeline.  In this cases, return
     the entire generated key sequence, even if we hit an unbound
     prefix or a definition before the end.  This means that you will
     be able to push back the event properly, and also means that
     read-key-sequence will always return a logical unit.

     Better ideas?  */
  for (; t < mock_input; t++)
    add_command_key (keybuf[t]);
  echo_update ();

  return t;
}

static Lisp_Object
read_key_sequence_vs (Lisp_Object prompt, Lisp_Object continue_echo,
		      Lisp_Object dont_downcase_last,
		      Lisp_Object can_return_switch_frame,
		      Lisp_Object cmd_loop, bool allow_string)
{
  ptrdiff_t count = SPECPDL_INDEX ();

  if (!NILP (prompt))
    CHECK_STRING (prompt);
  maybe_quit ();

  specbind (Qinput_method_exit_on_first_char,
	    (NILP (cmd_loop) ? Qt : Qnil));
  specbind (Qinput_method_use_echo_area,
	    (NILP (cmd_loop) ? Qt : Qnil));

  if (NILP (continue_echo))
    {
      this_command_key_count = 0;
      this_single_command_key_start = 0;
    }

#ifdef HAVE_WINDOW_SYSTEM
  if (display_hourglass_p)
    cancel_hourglass ();
#endif

  raw_keybuf_count = 0;
  Lisp_Object keybuf[READ_KEY_ELTS];
  int i = read_key_sequence (keybuf, prompt, ! NILP (dont_downcase_last),
			     ! NILP (can_return_switch_frame), false, false);

#if 0  /* The following is fine for code reading a key sequence and
	  then proceeding with a lengthy computation, but it's not good
	  for code reading keys in a loop, like an input method.  */
#ifdef HAVE_WINDOW_SYSTEM
  if (display_hourglass_p)
    start_hourglass ();
#endif
#endif

  if (i == -1)
    {
      Vquit_flag = Qt;
      maybe_quit ();
    }

  return unbind_to (count,
		    ((allow_string ? make_event_array : Fvector)
		     (i, keybuf)));
}

DEFUN ("read-key-sequence", Fread_key_sequence, Sread_key_sequence, 1, 5, 0,
       doc: /* Read a sequence of keystrokes and return as a string or vector.
The sequence is sufficient to specify a non-prefix command in the
current local and global maps.

First arg PROMPT is a prompt string.  If nil, do not prompt specially.
Second (optional) arg CONTINUE-ECHO, if non-nil, means this key echos
as a continuation of the previous key.

The third (optional) arg DONT-DOWNCASE-LAST, if non-nil, means do not
convert the last event to lower case.  (Normally any upper case event
is converted to lower case if the original event is undefined and the lower
case equivalent is defined.)  A non-nil value is appropriate for reading
a key sequence to be defined.

A C-g typed while in this function is treated like any other character,
and `quit-flag' is not set.

If the key sequence starts with a mouse click, then the sequence is read
using the keymaps of the buffer of the window clicked in, not the buffer
of the selected window as normal.

`read-key-sequence' drops unbound button-down events, since you normally
only care about the click or drag events which follow them.  If a drag
or multi-click event is unbound, but the corresponding click event would
be bound, `read-key-sequence' turns the event into a click event at the
drag's starting position.  This means that you don't have to distinguish
between click and drag, double, or triple events unless you want to.

`read-key-sequence' prefixes mouse events on mode lines, the vertical
lines separating windows, and scroll bars with imaginary keys
`mode-line', `vertical-line', and `vertical-scroll-bar'.

Optional fourth argument CAN-RETURN-SWITCH-FRAME non-nil means that this
function will process a switch-frame event if the user switches frames
before typing anything.  If the user switches frames in the middle of a
key sequence, or at the start of the sequence but CAN-RETURN-SWITCH-FRAME
is nil, then the event will be put off until after the current key sequence.

`read-key-sequence' checks `function-key-map' for function key
sequences, where they wouldn't conflict with ordinary bindings.  See
`function-key-map' for more details.

The optional fifth argument CMD-LOOP, if non-nil, means
that this key sequence is being read by something that will
read commands one after another.  It should be nil if the caller
will read just one key sequence.  */)
  (Lisp_Object prompt, Lisp_Object continue_echo, Lisp_Object dont_downcase_last, Lisp_Object can_return_switch_frame, Lisp_Object cmd_loop)
{
  return read_key_sequence_vs (prompt, continue_echo, dont_downcase_last,
			       can_return_switch_frame, cmd_loop, true);
}

DEFUN ("read-key-sequence-vector", Fread_key_sequence_vector,
       Sread_key_sequence_vector, 1, 5, 0,
       doc: /* Like `read-key-sequence' but always return a vector.  */)
  (Lisp_Object prompt, Lisp_Object continue_echo, Lisp_Object dont_downcase_last, Lisp_Object can_return_switch_frame, Lisp_Object cmd_loop)
{
  return read_key_sequence_vs (prompt, continue_echo, dont_downcase_last,
			       can_return_switch_frame, cmd_loop, false);
}
\f
/* Return true if input events are pending.  */

bool
detect_input_pending (void)
{
  return input_pending || get_input_pending (0);
}

/* Return true if input events other than mouse movements are
   pending.  */

bool
detect_input_pending_ignore_squeezables (void)
{
  return input_pending || get_input_pending (READABLE_EVENTS_IGNORE_SQUEEZABLES);
}

/* Return true if input events are pending, and run any pending timers.  */

bool
detect_input_pending_run_timers (bool do_display)
{
  unsigned old_timers_run = timers_run;

  if (!input_pending)
    get_input_pending (READABLE_EVENTS_DO_TIMERS_NOW);

  if (old_timers_run != timers_run && do_display)
    redisplay_preserve_echo_area (8);

  return input_pending;
}

/* This is called in some cases before a possible quit.
   It cases the next call to detect_input_pending to recompute input_pending.
   So calling this function unnecessarily can't do any harm.  */

void
clear_input_pending (void)
{
  input_pending = false;
}

/* Return true if there are pending requeued events.
   This isn't used yet.  The hope is to make wait_reading_process_output
   call it, and return if it runs Lisp code that unreads something.
   The problem is, kbd_buffer_get_event needs to be fixed to know what
   to do in that case.  It isn't trivial.  */

bool
requeued_events_pending_p (void)
{
  return (CONSP (Vunread_command_events));
}

DEFUN ("input-pending-p", Finput_pending_p, Sinput_pending_p, 0, 1, 0,
       doc: /* Return t if command input is currently available with no wait.
Actually, the value is nil only if we can be sure that no input is available;
if there is a doubt, the value is t.

If CHECK-TIMERS is non-nil, timers that are ready to run will do so.  */)
  (Lisp_Object check_timers)
{
  if (CONSP (Vunread_command_events)
      || !NILP (Vunread_post_input_method_events)
      || !NILP (Vunread_input_method_events))
    return (Qt);

  /* Process non-user-visible events (Bug#10195).  */
  process_special_events ();

  return (get_input_pending ((NILP (check_timers)
                              ? 0 : READABLE_EVENTS_DO_TIMERS_NOW)
			     | READABLE_EVENTS_FILTER_EVENTS)
	  ? Qt : Qnil);
}

/* Reallocate recent_keys copying the recorded keystrokes
   in the right order.  */
static void
update_recent_keys (int new_size, int kept_keys)
{
  int osize = ASIZE (recent_keys);
  eassert (recent_keys_index < osize);
  eassert (kept_keys <= min (osize, new_size));
  Lisp_Object v = make_nil_vector (new_size);
  int i, idx;
  for (i = 0; i < kept_keys; ++i)
    {
      idx = recent_keys_index - kept_keys + i;
      while (idx < 0)
        idx += osize;
      ASET (v, i, AREF (recent_keys, idx));
    }
  recent_keys = v;
  total_keys = kept_keys;
  recent_keys_index = total_keys % new_size;
  lossage_limit = new_size;

}

DEFUN ("lossage-size", Flossage_size, Slossage_size, 0, 1,
       "(list (read-number \"Set maximum keystrokes to: \" (lossage-size)))",
       doc: /* Return or set the maximum number of keystrokes to save.
If called with a non-nil ARG, set the limit to ARG and return it.
Otherwise, return the current limit.

The saved keystrokes are shown by `view-lossage'.  */)
  (Lisp_Object arg)
{
  if (NILP(arg))
    return make_fixnum (lossage_limit);

  if (!FIXNATP (arg))
    user_error ("Value must be a positive integer");
  int osize = ASIZE (recent_keys);
  eassert (lossage_limit == osize);
  int min_size = MIN_NUM_RECENT_KEYS;
  int new_size = XFIXNAT (arg);

  if (new_size == osize)
    return make_fixnum (lossage_limit);

  if (new_size < min_size)
    {
      AUTO_STRING (fmt, "Value must be >= %d");
      Fsignal (Quser_error, list1 (CALLN (Fformat, fmt, make_fixnum (min_size))));
    }

  int kept_keys = new_size > osize ? total_keys : min (new_size, total_keys);
  update_recent_keys (new_size, kept_keys);

  return make_fixnum (lossage_limit);
}

DEFUN ("recent-keys", Frecent_keys, Srecent_keys, 0, 1, 0,
       doc: /* Return vector of last few events, not counting those from keyboard macros.
If INCLUDE-CMDS is non-nil, include the commands that were run,
represented as pseudo-events of the form (nil . COMMAND).  */)
  (Lisp_Object include_cmds)
{
  bool cmds = !NILP (include_cmds);

  if (!total_keys
      || (cmds && total_keys < lossage_limit))
    return Fvector (total_keys,
		    XVECTOR (recent_keys)->contents);
  else
    {
      Lisp_Object es = Qnil;
      int i = (total_keys < lossage_limit
	       ? 0 : recent_keys_index);
      eassert (recent_keys_index < lossage_limit);
      do
	{
	  Lisp_Object e = AREF (recent_keys, i);
	  if (cmds || !CONSP (e) || !NILP (XCAR (e)))
	    es = Fcons (e, es);
	  if (++i >= lossage_limit)
	    i = 0;
	} while (i != recent_keys_index);
      es = Fnreverse (es);
      return Fvconcat (1, &es);
    }
}

DEFUN ("this-command-keys", Fthis_command_keys, Sthis_command_keys, 0, 0, 0,
       doc: /* Return the key sequence that invoked this command.
However, if the command has called `read-key-sequence', it returns
the last key sequence that has been read.
The value is a string or a vector.

See also `this-command-keys-vector'.  */)
  (void)
{
  return make_event_array (this_command_key_count,
			   XVECTOR (this_command_keys)->contents);
}

DEFUN ("set--this-command-keys", Fset__this_command_keys,
       Sset__this_command_keys, 1, 1, 0,
       doc: /* Set the vector to be returned by `this-command-keys'.
The argument KEYS must be a string.
Internal use only.  */)
  (Lisp_Object keys)
{
  CHECK_STRING (keys);

  this_command_key_count = 0;
  this_single_command_key_start = 0;

  ptrdiff_t charidx = 0, byteidx = 0;
  int key0 = fetch_string_char_advance (keys, &charidx, &byteidx);
  if (CHAR_BYTE8_P (key0))
    key0 = CHAR_TO_BYTE8 (key0);

  /* Kludge alert: this makes M-x be in the form expected by
     novice.el.  (248 is \370, a.k.a. "Meta-x".)  Any better ideas?  */
  if (key0 == 248)
    add_command_key (make_fixnum ('x' | meta_modifier));
  else
    add_command_key (make_fixnum (key0));
  for (ptrdiff_t i = 1; i < SCHARS (keys); i++)
    {
      int key_i = fetch_string_char_advance (keys, &charidx, &byteidx);
      if (CHAR_BYTE8_P (key_i))
	key_i = CHAR_TO_BYTE8 (key_i);
      add_command_key (make_fixnum (key_i));
    }
  return Qnil;
}

DEFUN ("this-command-keys-vector", Fthis_command_keys_vector, Sthis_command_keys_vector, 0, 0, 0,
       doc: /* Return the key sequence that invoked this command, as a vector.
However, if the command has called `read-key-sequence', it returns
the last key sequence that has been read.

See also `this-command-keys'.  */)
  (void)
{
  return Fvector (this_command_key_count,
		  XVECTOR (this_command_keys)->contents);
}

DEFUN ("this-single-command-keys", Fthis_single_command_keys,
       Sthis_single_command_keys, 0, 0, 0,
       doc: /* Return the key sequence that invoked this command.
More generally, it returns the last key sequence read, either by
the command loop or by `read-key-sequence'.
The value is always a vector.  */)
  (void)
{
  return Fvector (this_command_key_count
		  - this_single_command_key_start,
		  (XVECTOR (this_command_keys)->contents
		   + this_single_command_key_start));
}

DEFUN ("this-single-command-raw-keys", Fthis_single_command_raw_keys,
       Sthis_single_command_raw_keys, 0, 0, 0,
       doc: /* Return the raw events that were read for this command.
More generally, it returns the last key sequence read, either by
the command loop or by `read-key-sequence'.
Unlike `this-single-command-keys', this function's value
shows the events before all translations (except for input methods).
The value is always a vector.  */)
  (void)
{
  return Fvector (raw_keybuf_count, XVECTOR (raw_keybuf)->contents);
}

DEFUN ("clear-this-command-keys", Fclear_this_command_keys,
       Sclear_this_command_keys, 0, 1, 0,
       doc: /* Clear out the vector that `this-command-keys' returns.
Also clear the record of the last 300 input events, unless optional arg
KEEP-RECORD is non-nil.  */)
  (Lisp_Object keep_record)
{
  int i;

  this_command_key_count = 0;

  if (NILP (keep_record))
    {
      for (i = 0; i < ASIZE (recent_keys); ++i)
	ASET (recent_keys, i, Qnil);
      total_keys = 0;
      recent_keys_index = 0;
    }
  return Qnil;
}

DEFUN ("recursion-depth", Frecursion_depth, Srecursion_depth, 0, 0, 0,
       doc: /* Return the current depth in recursive edits.  */)
  (void)
{
  EMACS_INT sum;
  INT_ADD_WRAPV (command_loop_level, minibuf_level, &sum);
  return make_fixnum (sum);
}

DEFUN ("open-dribble-file", Fopen_dribble_file, Sopen_dribble_file, 1, 1,
       "FOpen dribble file: ",
       doc: /* Start writing input events to a dribble file called FILE.
Any previously open dribble file will be closed first.  If FILE is
nil, just close the dribble file, if any.

If the file is still open when Emacs exits, it will be closed then.

The events written to the file include keyboard and mouse input
events, but not events from executing keyboard macros.  The events are
written to the dribble file immediately without line buffering.

Be aware that this records ALL characters you type!
This may include sensitive information such as passwords.  */)
  (Lisp_Object file)
{
  if (dribble)
    {
      block_input ();
      fclose (dribble);
      unblock_input ();
      dribble = 0;
    }
  if (!NILP (file))
    {
      int fd;
      Lisp_Object encfile;

      file = Fexpand_file_name (file, Qnil);
      encfile = ENCODE_FILE (file);
      fd = emacs_open (SSDATA (encfile), O_WRONLY | O_CREAT | O_EXCL, 0600);
      if (fd < 0 && errno == EEXIST
	  && (unlink (SSDATA (encfile)) == 0 || errno == ENOENT))
	fd = emacs_open (SSDATA (encfile), O_WRONLY | O_CREAT | O_EXCL, 0600);
      dribble = fd < 0 ? 0 : fdopen (fd, "w");
      if (dribble == 0)
	report_file_error ("Opening dribble", file);
    }
  return Qnil;
}

DEFUN ("discard-input", Fdiscard_input, Sdiscard_input, 0, 0, 0,
       doc: /* Discard the contents of the terminal input buffer.
Also end any kbd macro being defined.  */)
  (void)
{
  if (!NILP (KVAR (current_kboard, defining_kbd_macro)))
    {
      /* Discard the last command from the macro.  */
      Fcancel_kbd_macro_events ();
      end_kbd_macro ();
    }

  Vunread_command_events = Qnil;

  discard_tty_input ();

  kbd_fetch_ptr =  kbd_store_ptr;
  input_pending = false;

  return Qnil;
}
\f
DEFUN ("suspend-emacs", Fsuspend_emacs, Ssuspend_emacs, 0, 1, "",
       doc: /* Stop Emacs and return to superior process.  You can resume later.
If `cannot-suspend' is non-nil, or if the system doesn't support job
control, run a subshell instead.

If optional arg STUFFSTRING is non-nil, its characters are stuffed
to be read as terminal input by Emacs's parent, after suspension.

Before suspending, run the normal hook `suspend-hook'.
After resumption run the normal hook `suspend-resume-hook'.

Some operating systems cannot stop the Emacs process and resume it later.
On such systems, Emacs starts a subshell instead of suspending.  */)
  (Lisp_Object stuffstring)
{
  ptrdiff_t count = SPECPDL_INDEX ();
  int old_height, old_width;
  int width, height;

  if (tty_list && tty_list->next)
    error ("There are other tty frames open; close them before suspending Emacs");

  if (!NILP (stuffstring))
    CHECK_STRING (stuffstring);

  run_hook (intern ("suspend-hook"));

  get_tty_size (fileno (CURTTY ()->input), &old_width, &old_height);
  reset_all_sys_modes ();
  /* sys_suspend can get an error if it tries to fork a subshell
     and the system resources aren't available for that.  */
  record_unwind_protect_void (init_all_sys_modes);
  stuff_buffered_input (stuffstring);
  if (cannot_suspend)
    sys_subshell ();
  else
    sys_suspend ();
  unbind_to (count, Qnil);

  /* Check if terminal/window size has changed.
     Note that this is not useful when we are running directly
     with a window system; but suspend should be disabled in that case.  */
  get_tty_size (fileno (CURTTY ()->input), &width, &height);
  if (width != old_width || height != old_height)
    change_frame_size (SELECTED_FRAME (), width, height, false, false, false);

  run_hook (intern ("suspend-resume-hook"));

  return Qnil;
}

/* If STUFFSTRING is a string, stuff its contents as pending terminal input.
   Then in any case stuff anything Emacs has read ahead and not used.  */

void
stuff_buffered_input (Lisp_Object stuffstring)
{
#ifdef SIGTSTP  /* stuff_char is defined if SIGTSTP.  */
  register unsigned char *p;

  if (STRINGP (stuffstring))
    {
      register ptrdiff_t count;

      p = SDATA (stuffstring);
      count = SBYTES (stuffstring);
      while (count-- > 0)
	stuff_char (*p++);
      stuff_char ('\n');
    }

  /* Anything we have read ahead, put back for the shell to read.  */
  /* ?? What should this do when we have multiple keyboards??
     Should we ignore anything that was typed in at the "wrong" kboard?

     rms: we should stuff everything back into the kboard
     it came from.  */
  for (; kbd_fetch_ptr != kbd_store_ptr;
       kbd_fetch_ptr = next_kbd_event (kbd_fetch_ptr))
    {

      if (kbd_fetch_ptr->kind == ASCII_KEYSTROKE_EVENT)
	stuff_char (kbd_fetch_ptr->ie.code);

      clear_event (&kbd_fetch_ptr->ie);
    }

  input_pending = false;
#endif /* SIGTSTP */
}
\f
void
set_waiting_for_input (struct timespec *time_to_clear)
{
  input_available_clear_time = time_to_clear;

  /* Tell handle_interrupt to throw back to read_char,  */
  waiting_for_input = true;

  /* If handle_interrupt was called before and buffered a C-g,
     make it run again now, to avoid timing error.  */
  if (!NILP (Vquit_flag))
    quit_throw_to_read_char (0);
}

void
clear_waiting_for_input (void)
{
  /* Tell handle_interrupt not to throw back to read_char,  */
  waiting_for_input = false;
  input_available_clear_time = 0;
}

/* The SIGINT handler.

   If we have a frame on the controlling tty, we assume that the
   SIGINT was generated by C-g, so we call handle_interrupt.
   Otherwise, tell maybe_quit to kill Emacs.  */

static void
handle_interrupt_signal (int sig)
{
  /* See if we have an active terminal on our controlling tty.  */
  struct terminal *terminal = get_named_terminal (DEV_TTY);
  if (!terminal)
    {
      /* If there are no frames there, let's pretend that we are a
         well-behaving UN*X program and quit.  We must not call Lisp
         in a signal handler, so tell maybe_quit to exit when it is
         safe.  */
      Vquit_flag = Qkill_emacs;
    }
  else
    {
      /* Otherwise, the SIGINT was probably generated by C-g.  */

      /* Set internal_last_event_frame to the top frame of the
         controlling tty, if we have a frame there.  We disable the
         interrupt key on secondary ttys, so the SIGINT must have come
         from the controlling tty.  */
      internal_last_event_frame = terminal->display_info.tty->top_frame;

      handle_interrupt (1);
    }
}

static void
deliver_interrupt_signal (int sig)
{
  deliver_process_signal (sig, handle_interrupt_signal);
}

/* Output MSG directly to standard output, without buffering.  Ignore
   failures.  This is safe in a signal handler.  */
static void
write_stdout (char const *msg)
{
  ignore_value (write (STDOUT_FILENO, msg, strlen (msg)));
}

/* Read a byte from stdin, without buffering.  Safe in signal handlers.  */
static int
read_stdin (void)
{
  char c;
  return read (STDIN_FILENO, &c, 1) == 1 ? c : EOF;
}

/* If Emacs is stuck because `inhibit-quit' is true, then keep track
   of the number of times C-g has been requested.  If C-g is pressed
   enough times, then quit anyway.  See bug#6585.  */
static int volatile force_quit_count;

/* This routine is called at interrupt level in response to C-g.

   It is called from the SIGINT handler or kbd_buffer_store_event.

   If `waiting_for_input' is non zero, then unless `echoing' is
   nonzero, immediately throw back to read_char.

   Otherwise it sets the Lisp variable quit-flag not-nil.  This causes
   eval to throw, when it gets a chance.  If quit-flag is already
   non-nil, it stops the job right away.  */

static void
handle_interrupt (bool in_signal_handler)
{
  char c;

  cancel_echoing ();

  /* XXX This code needs to be revised for multi-tty support.  */
  if (!NILP (Vquit_flag) && get_named_terminal (DEV_TTY))
    {
      if (! in_signal_handler)
	{
	  /* If SIGINT isn't blocked, don't let us be interrupted by
	     a SIGINT.  It might be harmful due to non-reentrancy
	     in I/O functions.  */
	  sigset_t blocked;
	  sigemptyset (&blocked);
	  sigaddset (&blocked, SIGINT);
	  pthread_sigmask (SIG_BLOCK, &blocked, 0);
	  fflush (stdout);
	}

      reset_all_sys_modes ();

#ifdef SIGTSTP
/*
 * On systems which can suspend the current process and return to the original
 * shell, this command causes the user to end up back at the shell.
 * The "Auto-save" and "Abort" questions are not asked until
 * the user elects to return to emacs, at which point he can save the current
 * job and either dump core or continue.
 */
      sys_suspend ();
#else
      /* Perhaps should really fork an inferior shell?
	 But that would not provide any way to get back
	 to the original shell, ever.  */
      write_stdout ("No support for stopping a process"
		    " on this operating system;\n"
		    "you can continue or abort.\n");
#endif /* not SIGTSTP */
#ifdef MSDOS
      /* We must remain inside the screen area when the internal terminal
	 is used.  Note that [Enter] is not echoed by dos.  */
      cursor_to (SELECTED_FRAME (), 0, 0);
#endif

      write_stdout ("Emacs is resuming after an emergency escape.\n");

      /* It doesn't work to autosave while GC is in progress;
	 the code used for auto-saving doesn't cope with the mark bit.  */
      if (!gc_in_progress)
	{
	  write_stdout ("Auto-save? (y or n) ");
	  c = read_stdin ();
	  if (c == 'y' || c == 'Y')
	    {
	      Fdo_auto_save (Qt, Qnil);
#ifdef MSDOS
	      write_stdout ("\r\nAuto-save done");
#else
	      write_stdout ("Auto-save done\n");
#endif
	    }
	  while (c != '\n')
	    c = read_stdin ();
	}
      else
	{
	  /* During GC, it must be safe to reenable quitting again.  */
	  Vinhibit_quit = Qnil;
	  write_stdout
	    (
#ifdef MSDOS
	     "\r\n"
#endif
	     "Garbage collection in progress; cannot auto-save now\r\n"
	     "but will instead do a real quit"
	     " after garbage collection ends\r\n");
	}

#ifdef MSDOS
      write_stdout ("\r\nAbort?  (y or n) ");
#else
      write_stdout ("Abort (and dump core)? (y or n) ");
#endif
      c = read_stdin ();
      if (c == 'y' || c == 'Y')
	emacs_abort ();
      while (c != '\n')
	c = read_stdin ();
#ifdef MSDOS
      write_stdout ("\r\nContinuing...\r\n");
#else /* not MSDOS */
      write_stdout ("Continuing...\n");
#endif /* not MSDOS */
      init_all_sys_modes ();
    }
  else
    {
      /* Request quit when it's safe.  */
      int count = NILP (Vquit_flag) ? 1 : force_quit_count + 1;
      force_quit_count = count;
      if (count == 3)
	Vinhibit_quit = Qnil;
      Vquit_flag = Qt;
    }

  pthread_sigmask (SIG_SETMASK, &empty_mask, 0);

/* TODO: The longjmp in this call throws the NS event loop integration off,
         and it seems to do fine without this.  Probably some attention
	 needs to be paid to the setting of waiting_for_input in
         wait_reading_process_output() under HAVE_NS because of the call
         to ns_select there (needed because otherwise events aren't picked up
         outside of polling since we don't get SIGIO like X and we don't have a
         separate event loop thread like W32.  */
#ifndef HAVE_NS
#ifdef THREADS_ENABLED
  /* If we were called from a signal handler, we must be in the main
     thread, see deliver_process_signal.  So we must make sure the
     main thread holds the global lock.  */
  if (in_signal_handler)
    maybe_reacquire_global_lock ();
#endif
  if (waiting_for_input && !echoing)
    quit_throw_to_read_char (in_signal_handler);
#endif
}

/* Handle a C-g by making read_char return C-g.  */

static void
quit_throw_to_read_char (bool from_signal)
{
  /* When not called from a signal handler it is safe to call
     Lisp.  */
  if (!from_signal && EQ (Vquit_flag, Qkill_emacs))
    Fkill_emacs (Qnil);

  /* Prevent another signal from doing this before we finish.  */
  clear_waiting_for_input ();
  input_pending = false;

  Vunread_command_events = Qnil;

  if (FRAMEP (internal_last_event_frame)
      && !EQ (internal_last_event_frame, selected_frame))
    do_switch_frame (make_lispy_switch_frame (internal_last_event_frame),
		     0, 0, Qnil);

  sys_longjmp (getcjmp, 1);
}
\f
DEFUN ("set-input-interrupt-mode", Fset_input_interrupt_mode,
       Sset_input_interrupt_mode, 1, 1, 0,
       doc: /* Set interrupt mode of reading keyboard input.
If INTERRUPT is non-nil, Emacs will use input interrupts;
otherwise Emacs uses CBREAK mode.

See also `current-input-mode'.  */)
  (Lisp_Object interrupt)
{
  bool new_interrupt_input;
#ifdef USABLE_SIGIO
#ifdef HAVE_X_WINDOWS
  if (x_display_list != NULL)
    {
      /* When using X, don't give the user a real choice,
	 because we haven't implemented the mechanisms to support it.  */
      new_interrupt_input = true;
    }
  else
#endif /* HAVE_X_WINDOWS */
    new_interrupt_input = !NILP (interrupt);
#else /* not USABLE_SIGIO */
  new_interrupt_input = false;
#endif /* not USABLE_SIGIO */

  if (new_interrupt_input != interrupt_input)
    {
#ifdef POLL_FOR_INPUT
      stop_polling ();
#endif
#ifndef DOS_NT
      /* this causes startup screen to be restored and messes with the mouse */
      reset_all_sys_modes ();
      interrupt_input = new_interrupt_input;
      init_all_sys_modes ();
#else
      interrupt_input = new_interrupt_input;
#endif

#ifdef POLL_FOR_INPUT
      poll_suppress_count = 1;
      start_polling ();
#endif
    }
  return Qnil;
}

DEFUN ("set-output-flow-control", Fset_output_flow_control, Sset_output_flow_control, 1, 2, 0,
       doc: /* Enable or disable ^S/^Q flow control for output to TERMINAL.
If FLOW is non-nil, flow control is enabled and you cannot use C-s or
C-q in key sequences.

This setting only has an effect on tty terminals and only when
Emacs reads input in CBREAK mode; see `set-input-interrupt-mode'.

See also `current-input-mode'.  */)
  (Lisp_Object flow, Lisp_Object terminal)
{
  struct terminal *t = decode_tty_terminal (terminal);
  struct tty_display_info *tty;

  if (!t)
    return Qnil;
  tty = t->display_info.tty;

  if (tty->flow_control != !NILP (flow))
    {
#ifndef DOS_NT
      /* This causes startup screen to be restored and messes with the mouse.  */
      reset_sys_modes (tty);
#endif

      tty->flow_control = !NILP (flow);

#ifndef DOS_NT
      init_sys_modes (tty);
#endif
    }
  return Qnil;
}

DEFUN ("set-input-meta-mode", Fset_input_meta_mode, Sset_input_meta_mode, 1, 2, 0,
       doc: /* Enable or disable 8-bit input on TERMINAL.
If META is t, Emacs will accept 8-bit input, and interpret the 8th
bit as the Meta modifier before it decodes the characters.

If META is `encoded', Emacs will interpret the 8th bit of single-byte
characters after decoding the characters.

If META is nil, Emacs will ignore the top bit, on the assumption it is
parity.

Otherwise, Emacs will accept and pass through 8-bit input without
specially interpreting the top bit.

This setting only has an effect on tty terminal devices.

Optional parameter TERMINAL specifies the tty terminal device to use.
It may be a terminal object, a frame, or nil for the terminal used by
the currently selected frame.

See also `current-input-mode'.  */)
  (Lisp_Object meta, Lisp_Object terminal)
{
  struct terminal *t = decode_tty_terminal (terminal);
  struct tty_display_info *tty;
  int new_meta;

  if (!t)
    return Qnil;
  tty = t->display_info.tty;

  if (NILP (meta))
    new_meta = 0;
  else if (EQ (meta, Qt))
    new_meta = 1;
  else if (EQ (meta, Qencoded))
    new_meta = 3;
  else
    new_meta = 2;

  if (tty->meta_key != new_meta)
    {
#ifndef DOS_NT
      /* this causes startup screen to be restored and messes with the mouse */
      reset_sys_modes (tty);
#endif

      tty->meta_key = new_meta;

#ifndef DOS_NT
      init_sys_modes (tty);
#endif
    }
  return Qnil;
}

DEFUN ("set-quit-char", Fset_quit_char, Sset_quit_char, 1, 1, 0,
       doc: /* Specify character used for quitting.
QUIT must be an ASCII character.

This function only has an effect on the controlling tty of the Emacs
process.

See also `current-input-mode'.  */)
  (Lisp_Object quit)
{
  struct terminal *t = get_named_terminal (DEV_TTY);
  struct tty_display_info *tty;

  if (!t)
    return Qnil;
  tty = t->display_info.tty;

  if (NILP (quit) || !FIXNUMP (quit) || XFIXNUM (quit) < 0 || XFIXNUM (quit) > 0400)
    error ("QUIT must be an ASCII character");

#ifndef DOS_NT
  /* this causes startup screen to be restored and messes with the mouse */
  reset_sys_modes (tty);
#endif

  /* Don't let this value be out of range.  */
  quit_char = XFIXNUM (quit) & (tty->meta_key == 0 ? 0177 : 0377);

#ifndef DOS_NT
  init_sys_modes (tty);
#endif

  return Qnil;
}

DEFUN ("set-input-mode", Fset_input_mode, Sset_input_mode, 3, 4, 0,
       doc: /* Set mode of reading keyboard input.
First arg INTERRUPT non-nil means use input interrupts;
 nil means use CBREAK mode.
Second arg FLOW non-nil means use ^S/^Q flow control for output to terminal
 (no effect except in CBREAK mode).
Third arg META t means accept 8-bit input (for a Meta key).
 META nil means ignore the top bit, on the assumption it is parity.
 META `encoded' means accept 8-bit input and interpret Meta after
   decoding the input characters.
 Otherwise, accept 8-bit input and don't use the top bit for Meta.
Optional fourth arg QUIT if non-nil specifies character to use for quitting.
See also `current-input-mode'.  */)
  (Lisp_Object interrupt, Lisp_Object flow, Lisp_Object meta, Lisp_Object quit)
{
  Fset_input_interrupt_mode (interrupt);
  Fset_output_flow_control (flow, Qnil);
  Fset_input_meta_mode (meta, Qnil);
  if (!NILP (quit))
    Fset_quit_char (quit);
  return Qnil;
}

DEFUN ("current-input-mode", Fcurrent_input_mode, Scurrent_input_mode, 0, 0, 0,
       doc: /* Return information about the way Emacs currently reads keyboard input.
The value is a list of the form (INTERRUPT FLOW META QUIT), where
  INTERRUPT is non-nil if Emacs is using interrupt-driven input; if
    nil, Emacs is using CBREAK mode.
  FLOW is non-nil if Emacs uses ^S/^Q flow control for output to the
    terminal; this does not apply if Emacs uses interrupt-driven input.
  META is t if accepting 8-bit unencoded input with 8th bit as Meta flag.
  META is `encoded' if accepting 8-bit encoded input with 8th bit as
    Meta flag which has to be interpreted after decoding the input.
  META is nil if ignoring the top bit of input, on the assumption that
    it is a parity bit.
  META is neither t nor nil if accepting 8-bit input and using
    all 8 bits as the character code.
  QUIT is the character Emacs currently uses to quit.
The elements of this list correspond to the arguments of
`set-input-mode'.  */)
  (void)
{
  struct frame *sf = XFRAME (selected_frame);

  Lisp_Object interrupt = interrupt_input ? Qt : Qnil;
  Lisp_Object flow, meta;
  if (FRAME_TERMCAP_P (sf) || FRAME_MSDOS_P (sf))
    {
      flow = FRAME_TTY (sf)->flow_control ? Qt : Qnil;
      meta = (FRAME_TTY (sf)->meta_key == 2
	      ? make_fixnum (0)
	      : (CURTTY ()->meta_key == 1
		 ? Qt
		 : (CURTTY ()->meta_key == 3 ? Qencoded : Qnil)));
    }
  else
    {
      flow = Qnil;
      meta = Qt;
    }
  Lisp_Object quit = make_fixnum (quit_char);

  return list4 (interrupt, flow, meta, quit);
}

DEFUN ("posn-at-x-y", Fposn_at_x_y, Sposn_at_x_y, 2, 4, 0,
       doc: /* Return position information for pixel coordinates X and Y.
By default, X and Y are relative to text area of the selected window.
Optional third arg FRAME-OR-WINDOW non-nil specifies frame or window.
If optional fourth arg WHOLE is non-nil, X is relative to the left
edge of the window.

The return value is similar to a mouse click position:
   (WINDOW AREA-OR-POS (X . Y) TIMESTAMP OBJECT POS (COL . ROW)
    IMAGE (DX . DY) (WIDTH . HEIGHT))
The `posn-' functions access elements of such lists.  */)
  (Lisp_Object x, Lisp_Object y, Lisp_Object frame_or_window, Lisp_Object whole)
{
  CHECK_FIXNUM (x);
  /* We allow X of -1, for the newline in a R2L line that overflowed
     into the left fringe.  */
  if (XFIXNUM (x) != -1)
    CHECK_FIXNAT (x);
  CHECK_FIXNAT (y);

  if (NILP (frame_or_window))
    frame_or_window = selected_window;

  if (WINDOWP (frame_or_window))
    {
      struct window *w = decode_live_window (frame_or_window);

      XSETINT (x, (XFIXNUM (x)
		   + WINDOW_LEFT_EDGE_X (w)
		   + (NILP (whole)
		      ? window_box_left_offset (w, TEXT_AREA)
		      : 0)));
      XSETINT (y, WINDOW_TO_FRAME_PIXEL_Y (w, XFIXNUM (y)));
      frame_or_window = w->frame;
    }

  CHECK_LIVE_FRAME (frame_or_window);

  return make_lispy_position (XFRAME (frame_or_window), x, y, 0);
}

DEFUN ("posn-at-point", Fposn_at_point, Sposn_at_point, 0, 2, 0,
       doc: /* Return position information for buffer position POS in WINDOW.
POS defaults to point in WINDOW; WINDOW defaults to the selected window.

Return nil if POS is not visible in WINDOW.  Otherwise,
the return value is similar to that returned by `event-start' for
a mouse click at the upper left corner of the glyph corresponding
to POS:
   (WINDOW AREA-OR-POS (X . Y) TIMESTAMP OBJECT POS (COL . ROW)
    IMAGE (DX . DY) (WIDTH . HEIGHT))
The `posn-' functions access elements of such lists.  */)
  (Lisp_Object pos, Lisp_Object window)
{
  Lisp_Object tem;

  if (NILP (window))
    window = selected_window;

  tem = Fpos_visible_in_window_p (pos, window, Qt);
  if (!NILP (tem))
    {
      Lisp_Object x = XCAR (tem);
      Lisp_Object y = XCAR (XCDR (tem));
      Lisp_Object aux_info = XCDR (XCDR (tem));
      int y_coord = XFIXNUM (y);

      /* Point invisible due to hscrolling?  X can be -1 when a
	 newline in a R2L line overflows into the left fringe.  */
      if (XFIXNUM (x) < -1)
	return Qnil;
      if (!NILP (aux_info) && y_coord < 0)
	{
	  int rtop = XFIXNUM (XCAR (aux_info));

	  y = make_fixnum (y_coord + rtop);
	}
      tem = Fposn_at_x_y (x, y, window, Qnil);
    }

  return tem;
}

/* Set up a new kboard object with reasonable initial values.
   TYPE is a window system for which this keyboard is used.  */

static void
init_kboard (KBOARD *kb, Lisp_Object type)
{
  kset_overriding_terminal_local_map (kb, Qnil);
  kset_last_command (kb, Qnil);
  kset_real_last_command (kb, Qnil);
  kset_keyboard_translate_table (kb, Qnil);
  kset_last_repeatable_command (kb, Qnil);
  kset_prefix_arg (kb, Qnil);
  kset_last_prefix_arg (kb, Qnil);
  kset_kbd_queue (kb, Qnil);
  kb->kbd_queue_has_data = false;
  kb->immediate_echo = false;
  kset_echo_string (kb, Qnil);
  kset_echo_prompt (kb, Qnil);
  kb->kbd_macro_buffer = 0;
  kb->kbd_macro_bufsize = 0;
  kset_defining_kbd_macro (kb, Qnil);
  kset_last_kbd_macro (kb, Qnil);
  kb->reference_count = 0;
  kset_system_key_alist (kb, Qnil);
  kset_system_key_syms (kb, Qnil);
  kset_window_system (kb, type);
  kset_input_decode_map (kb, Fmake_sparse_keymap (Qnil));
  kset_local_function_key_map (kb, Fmake_sparse_keymap (Qnil));
  Fset_keymap_parent (KVAR (kb, Vlocal_function_key_map), Vfunction_key_map);
  kset_default_minibuffer_frame (kb, Qnil);
}

/* Allocate and basically initialize keyboard
   object to use with window system TYPE.  */

KBOARD *
allocate_kboard (Lisp_Object type)
{
  KBOARD *kb = xmalloc (sizeof *kb);

  init_kboard (kb, type);
  kb->next_kboard = all_kboards;
  all_kboards = kb;
  return kb;
}

/*
 * Destroy the contents of a kboard object, but not the object itself.
 * We use this just before deleting it, or if we're going to initialize
 * it a second time.
 */
static void
wipe_kboard (KBOARD *kb)
{
  xfree (kb->kbd_macro_buffer);
}

/* Free KB and memory referenced from it.  */

void
delete_kboard (KBOARD *kb)
{
  KBOARD **kbp;

  for (kbp = &all_kboards; *kbp != kb; kbp = &(*kbp)->next_kboard)
    if (*kbp == NULL)
      emacs_abort ();
  *kbp = kb->next_kboard;

  /* Prevent a dangling reference to KB.  */
  if (kb == current_kboard
      && FRAMEP (selected_frame)
      && FRAME_LIVE_P (XFRAME (selected_frame)))
    {
      current_kboard = FRAME_KBOARD (XFRAME (selected_frame));
      single_kboard = false;
      if (current_kboard == kb)
	emacs_abort ();
    }

  wipe_kboard (kb);
  xfree (kb);
}

void
init_keyboard (void)
{
  /* This is correct before outermost invocation of the editor loop.  */
  command_loop_level = -1;
  quit_char = Ctl ('g');
  Vunread_command_events = Qnil;
  timer_idleness_start_time = invalid_timespec ();
  total_keys = 0;
  recent_keys_index = 0;
  kbd_fetch_ptr = kbd_buffer;
  kbd_store_ptr = kbd_buffer;
  track_mouse = Qnil;
  input_pending = false;
  interrupt_input_blocked = 0;
  pending_signals = false;

  /* This means that command_loop_1 won't try to select anything the first
     time through.  */
  internal_last_event_frame = Qnil;
  Vlast_event_frame = internal_last_event_frame;

  current_kboard = initial_kboard;
  /* Re-initialize the keyboard again.  */
  wipe_kboard (current_kboard);
  /* A value of nil for Vwindow_system normally means a tty, but we also use
     it for the initial terminal since there is no window system there.  */
  init_kboard (current_kboard, Qnil);

  if (!noninteractive)
    {
      /* Before multi-tty support, these handlers used to be installed
         only if the current session was a tty session.  Now an Emacs
         session may have multiple display types, so we always handle
         SIGINT.  There is special code in handle_interrupt_signal to exit
         Emacs on SIGINT when there are no termcap frames on the
         controlling terminal.  */
      struct sigaction action;
      emacs_sigaction_init (&action, deliver_interrupt_signal);
      sigaction (SIGINT, &action, 0);
#ifndef DOS_NT
      /* For systems with SysV TERMIO, C-g is set up for both SIGINT and
	 SIGQUIT and we can't tell which one it will give us.  */
      sigaction (SIGQUIT, &action, 0);
#endif /* not DOS_NT */
    }
#ifdef USABLE_SIGIO
  if (!noninteractive)
    {
      struct sigaction action;
      emacs_sigaction_init (&action, deliver_input_available_signal);
      sigaction (SIGIO, &action, 0);
    }
#endif

/* Use interrupt input by default, if it works and noninterrupt input
   has deficiencies.  */

#ifdef INTERRUPT_INPUT
  interrupt_input = 1;
#else
  interrupt_input = 0;
#endif

  pthread_sigmask (SIG_SETMASK, &empty_mask, 0);
  dribble = 0;

  if (keyboard_init_hook)
    (*keyboard_init_hook) ();

#ifdef POLL_FOR_INPUT
  poll_timer = NULL;
  poll_suppress_count = 1;
  start_polling ();
#endif
}

/* This type's only use is in syms_of_keyboard, to put properties on the
   event header symbols.  */
struct event_head
{
  short var;
  short kind;
};

static const struct event_head head_table[] = {
  {SYMBOL_INDEX (Qmouse_movement),      SYMBOL_INDEX (Qmouse_movement)},
  {SYMBOL_INDEX (Qscroll_bar_movement), SYMBOL_INDEX (Qmouse_movement)},

  /* Some of the event heads.  */
  {SYMBOL_INDEX (Qswitch_frame),        SYMBOL_INDEX (Qswitch_frame)},

  {SYMBOL_INDEX (Qfocus_in),            SYMBOL_INDEX (Qfocus_in)},
  {SYMBOL_INDEX (Qfocus_out),           SYMBOL_INDEX (Qfocus_out)},
  {SYMBOL_INDEX (Qmove_frame),          SYMBOL_INDEX (Qmove_frame)},
  {SYMBOL_INDEX (Qdelete_frame),        SYMBOL_INDEX (Qdelete_frame)},
  {SYMBOL_INDEX (Qiconify_frame),       SYMBOL_INDEX (Qiconify_frame)},
  {SYMBOL_INDEX (Qmake_frame_visible),  SYMBOL_INDEX (Qmake_frame_visible)},
  /* `select-window' should be handled just like `switch-frame'
     in read_key_sequence.  */
  {SYMBOL_INDEX (Qselect_window),       SYMBOL_INDEX (Qswitch_frame)}
};

static void syms_of_keyboard_for_pdumper (void);

void
syms_of_keyboard (void)
{
  pending_funcalls = Qnil;
  staticpro (&pending_funcalls);

  Vlispy_mouse_stem = build_pure_c_string ("mouse");
  staticpro (&Vlispy_mouse_stem);

  regular_top_level_message = build_pure_c_string ("Back to top level");
  staticpro (&regular_top_level_message);
#ifdef HAVE_STACK_OVERFLOW_HANDLING
  recover_top_level_message
    = build_pure_c_string ("Re-entering top level after C stack overflow");
  staticpro (&recover_top_level_message);
#endif
  DEFVAR_LISP ("internal--top-level-message", Vinternal__top_level_message,
	       doc: /* Message displayed by `normal-top-level'.  */);
  Vinternal__top_level_message = regular_top_level_message;

  /* Tool-bars.  */
  DEFSYM (QCimage, ":image");
  DEFSYM (Qhelp_echo, "help-echo");
  DEFSYM (Qhelp_echo_inhibit_substitution, "help-echo-inhibit-substitution");
  DEFSYM (QCrtl, ":rtl");

  staticpro (&item_properties);
  item_properties = Qnil;

  staticpro (&tab_bar_item_properties);
  tab_bar_item_properties = Qnil;
  staticpro (&tab_bar_items_vector);
  tab_bar_items_vector = Qnil;

  staticpro (&tool_bar_item_properties);
  tool_bar_item_properties = Qnil;
  staticpro (&tool_bar_items_vector);
  tool_bar_items_vector = Qnil;

  DEFSYM (Qtimer_event_handler, "timer-event-handler");

  /* Non-nil disable property on a command means do not execute it;
     call disabled-command-function's value instead.  */
  DEFSYM (Qdisabled, "disabled");

  DEFSYM (Qundefined, "undefined");

  /* Hooks to run before and after each command.  */
  DEFSYM (Qpre_command_hook, "pre-command-hook");
  DEFSYM (Qpost_command_hook, "post-command-hook");

  DEFSYM (Qundo_auto__add_boundary, "undo-auto--add-boundary");
  DEFSYM (Qundo_auto__undoably_changed_buffers,
          "undo-auto--undoably-changed-buffers");

  DEFSYM (Qdeferred_action_function, "deferred-action-function");
  DEFSYM (Qdelayed_warnings_hook, "delayed-warnings-hook");
  DEFSYM (Qfunction_key, "function-key");

  /* The values of Qevent_kind properties.  */
  DEFSYM (Qmouse_click, "mouse-click");

  DEFSYM (Qdrag_n_drop, "drag-n-drop");
  DEFSYM (Qsave_session, "save-session");
  DEFSYM (Qconfig_changed_event, "config-changed-event");

  /* Menu and tool bar item parts.  */
  DEFSYM (Qmenu_enable, "menu-enable");

#ifdef HAVE_NTGUI
  DEFSYM (Qlanguage_change, "language-change");
  DEFSYM (Qend_session, "end-session");
#endif

#ifdef HAVE_DBUS
  DEFSYM (Qdbus_event, "dbus-event");
#endif

#ifdef THREADS_ENABLED
  DEFSYM (Qthread_event, "thread-event");
#endif

#ifdef HAVE_XWIDGETS
  DEFSYM (Qxwidget_event, "xwidget-event");
#endif

#ifdef USE_FILE_NOTIFY
  DEFSYM (Qfile_notify, "file-notify");
#endif /* USE_FILE_NOTIFY */

  /* Menu and tool bar item parts.  */
  DEFSYM (QCenable, ":enable");
  DEFSYM (QCvisible, ":visible");
  DEFSYM (QChelp, ":help");
  DEFSYM (QCfilter, ":filter");
  DEFSYM (QCbutton, ":button");
  DEFSYM (QCkeys, ":keys");
  DEFSYM (QCkey_sequence, ":key-sequence");

  /* Non-nil disable property on a command means
     do not execute it; call disabled-command-function's value instead.  */
  DEFSYM (QCtoggle, ":toggle");
  DEFSYM (QCradio, ":radio");
  DEFSYM (QClabel, ":label");
  DEFSYM (QCvert_only, ":vert-only");

  /* Symbols to use for parts of windows.  */
  DEFSYM (Qvertical_line, "vertical-line");
  DEFSYM (Qright_divider, "right-divider");
  DEFSYM (Qbottom_divider, "bottom-divider");

  DEFSYM (Qmouse_fixup_help_message, "mouse-fixup-help-message");

  DEFSYM (Qabove_handle, "above-handle");
  DEFSYM (Qhandle, "handle");
  DEFSYM (Qbelow_handle, "below-handle");
  DEFSYM (Qup, "up");
  DEFSYM (Qdown, "down");
  DEFSYM (Qtop, "top");
  DEFSYM (Qbottom, "bottom");
  DEFSYM (Qend_scroll, "end-scroll");
  DEFSYM (Qratio, "ratio");
  DEFSYM (Qbefore_handle, "before-handle");
  DEFSYM (Qhorizontal_handle, "horizontal-handle");
  DEFSYM (Qafter_handle, "after-handle");
  DEFSYM (Qleft, "left");
  DEFSYM (Qright, "right");
  DEFSYM (Qleftmost, "leftmost");
  DEFSYM (Qrightmost, "rightmost");

  /* Properties of event headers.  */
  DEFSYM (Qevent_kind, "event-kind");
  DEFSYM (Qevent_symbol_elements, "event-symbol-elements");

  /* An event header symbol HEAD may have a property named
     Qevent_symbol_element_mask, which is of the form (BASE MODIFIERS);
     BASE is the base, unmodified version of HEAD, and MODIFIERS is the
     mask of modifiers applied to it.  If present, this is used to help
     speed up parse_modifiers.  */
  DEFSYM (Qevent_symbol_element_mask, "event-symbol-element-mask");

  /* An unmodified event header BASE may have a property named
     Qmodifier_cache, which is an alist mapping modifier masks onto
     modified versions of BASE.  If present, this helps speed up
     apply_modifiers.  */
  DEFSYM (Qmodifier_cache, "modifier-cache");

  DEFSYM (Qrecompute_lucid_menubar, "recompute-lucid-menubar");
  DEFSYM (Qactivate_menubar_hook, "activate-menubar-hook");

  DEFSYM (Qpolling_period, "polling-period");

  DEFSYM (Qgui_set_selection, "gui-set-selection");

  /* The primary selection.  */
  DEFSYM (QPRIMARY, "PRIMARY");

  DEFSYM (Qhandle_switch_frame, "handle-switch-frame");
  DEFSYM (Qhandle_select_window, "handle-select-window");

  DEFSYM (Qinput_method_exit_on_first_char, "input-method-exit-on-first-char");
  DEFSYM (Qinput_method_use_echo_area, "input-method-use-echo-area");

  DEFSYM (Qhelp_form_show, "help-form-show");

  DEFSYM (Qecho_keystrokes, "echo-keystrokes");

  Fset (Qinput_method_exit_on_first_char, Qnil);
  Fset (Qinput_method_use_echo_area, Qnil);

  /* Symbols for dragging internal borders.  */
  DEFSYM (Qdrag_internal_border, "drag-internal-border");
  DEFSYM (Qleft_edge, "left-edge");
  DEFSYM (Qtop_left_corner, "top-left-corner");
  DEFSYM (Qtop_edge, "top-edge");
  DEFSYM (Qtop_right_corner, "top-right-corner");
  DEFSYM (Qright_edge, "right-edge");
  DEFSYM (Qbottom_right_corner, "bottom-right-corner");
  DEFSYM (Qbottom_edge, "bottom-edge");
  DEFSYM (Qbottom_left_corner, "bottom-left-corner");

  /* Symbols to head events.  */
  DEFSYM (Qmouse_movement, "mouse-movement");
  DEFSYM (Qscroll_bar_movement, "scroll-bar-movement");
  DEFSYM (Qswitch_frame, "switch-frame");
  DEFSYM (Qfocus_in, "focus-in");
  DEFSYM (Qfocus_out, "focus-out");
  DEFSYM (Qmove_frame, "move-frame");
  DEFSYM (Qdelete_frame, "delete-frame");
  DEFSYM (Qiconify_frame, "iconify-frame");
  DEFSYM (Qmake_frame_visible, "make-frame-visible");
  DEFSYM (Qselect_window, "select-window");
  DEFSYM (Qselection_request, "selection-request");
  DEFSYM (Qwindow_edges, "window-edges");
  {
    int i;

    for (i = 0; i < ARRAYELTS (head_table); i++)
      {
	const struct event_head *p = &head_table[i];
	Lisp_Object var = builtin_lisp_symbol (p->var);
	Lisp_Object kind = builtin_lisp_symbol (p->kind);
	Fput (var, Qevent_kind, kind);
	Fput (var, Qevent_symbol_elements, list1 (var));
      }
  }
  DEFSYM (Qno_record, "no-record");
  DEFSYM (Qencoded, "encoded");

  button_down_location = make_nil_vector (5);
  staticpro (&button_down_location);
  staticpro (&frame_relative_event_pos);
  mouse_syms = make_nil_vector (5);
  staticpro (&mouse_syms);
  wheel_syms = make_nil_vector (ARRAYELTS (lispy_wheel_names));
  staticpro (&wheel_syms);

  {
    int i;
    int len = ARRAYELTS (modifier_names);

    modifier_symbols = make_nil_vector (len);
    for (i = 0; i < len; i++)
      if (modifier_names[i])
	ASET (modifier_symbols, i, intern_c_string (modifier_names[i]));
    staticpro (&modifier_symbols);
  }

  recent_keys = make_nil_vector (lossage_limit);
  staticpro (&recent_keys);

  this_command_keys = make_nil_vector (40);
  staticpro (&this_command_keys);

  raw_keybuf = make_nil_vector (30);
  staticpro (&raw_keybuf);

  DEFSYM (Qcommand_execute, "command-execute");
  DEFSYM (Qinternal_echo_keystrokes_prefix, "internal-echo-keystrokes-prefix");

  accent_key_syms = Qnil;
  staticpro (&accent_key_syms);

  func_key_syms = Qnil;
  staticpro (&func_key_syms);

  drag_n_drop_syms = Qnil;
  staticpro (&drag_n_drop_syms);

  unread_switch_frame = Qnil;
  staticpro (&unread_switch_frame);

  internal_last_event_frame = Qnil;
  staticpro (&internal_last_event_frame);

  read_key_sequence_cmd = Qnil;
  staticpro (&read_key_sequence_cmd);
  read_key_sequence_remapped = Qnil;
  staticpro (&read_key_sequence_remapped);

  menu_bar_one_keymap_changed_items = Qnil;
  staticpro (&menu_bar_one_keymap_changed_items);

  menu_bar_items_vector = Qnil;
  staticpro (&menu_bar_items_vector);

  help_form_saved_window_configs = Qnil;
  staticpro (&help_form_saved_window_configs);

  defsubr (&Scurrent_idle_time);
  defsubr (&Sevent_symbol_parse_modifiers);
  defsubr (&Sevent_convert_list);
  defsubr (&Sinternal_handle_focus_in);
  defsubr (&Sread_key_sequence);
  defsubr (&Sread_key_sequence_vector);
  defsubr (&Srecursive_edit);
  defsubr (&Sinternal_track_mouse);
  defsubr (&Sinput_pending_p);
  defsubr (&Slossage_size);
  defsubr (&Srecent_keys);
  defsubr (&Sthis_command_keys);
  defsubr (&Sthis_command_keys_vector);
  defsubr (&Sthis_single_command_keys);
  defsubr (&Sthis_single_command_raw_keys);
  defsubr (&Sset__this_command_keys);
  defsubr (&Sclear_this_command_keys);
  defsubr (&Ssuspend_emacs);
  defsubr (&Sabort_recursive_edit);
  defsubr (&Sexit_recursive_edit);
  defsubr (&Srecursion_depth);
  defsubr (&Scommand_error_default_function);
  defsubr (&Stop_level);
  defsubr (&Sdiscard_input);
  defsubr (&Sopen_dribble_file);
  defsubr (&Sset_input_interrupt_mode);
  defsubr (&Sset_output_flow_control);
  defsubr (&Sset_input_meta_mode);
  defsubr (&Sset_quit_char);
  defsubr (&Sset_input_mode);
  defsubr (&Scurrent_input_mode);
  defsubr (&Sposn_at_point);
  defsubr (&Sposn_at_x_y);

  DEFVAR_LISP ("last-command-event", last_command_event,
		     doc: /* Last input event of a key sequence that called a command.
See Info node `(elisp)Command Loop Info'.*/);

  DEFVAR_LISP ("last-nonmenu-event", last_nonmenu_event,
	       doc: /* Last input event in a command, except for mouse menu events.
Mouse menus give back keys that don't look like mouse events;
this variable holds the actual mouse event that led to the menu,
so that you can determine whether the command was run by mouse or not.  */);

  DEFVAR_LISP ("last-input-event", last_input_event,
	       doc: /* Last input event.  */);

  DEFVAR_LISP ("unread-command-events", Vunread_command_events,
	       doc: /* List of events to be read as the command input.
These events are processed first, before actual keyboard input.
Events read from this list are not normally added to `this-command-keys',
as they will already have been added once as they were read for the first time.
An element of the form (t . EVENT) forces EVENT to be added to that list.
An element of the form (no-record . EVENT) means process EVENT, but do not
record it in the keyboard macros, recent-keys, and the dribble file.  */);
  Vunread_command_events = Qnil;

  DEFVAR_LISP ("unread-post-input-method-events", Vunread_post_input_method_events,
	       doc: /* List of events to be processed as input by input methods.
These events are processed before `unread-command-events'
and actual keyboard input, but are not given to `input-method-function'.  */);
  Vunread_post_input_method_events = Qnil;

  DEFVAR_LISP ("unread-input-method-events", Vunread_input_method_events,
	       doc: /* List of events to be processed as input by input methods.
These events are processed after `unread-command-events', but
before actual keyboard input.
If there's an active input method, the events are given to
`input-method-function'.  */);
  Vunread_input_method_events = Qnil;

  DEFVAR_LISP ("meta-prefix-char", meta_prefix_char,
	       doc: /* Meta-prefix character code.
Meta-foo as command input turns into this character followed by foo.  */);
  XSETINT (meta_prefix_char, 033);

  DEFVAR_KBOARD ("last-command", Vlast_command,
		 doc: /* The last command executed.
Normally a symbol with a function definition, but can be whatever was found
in the keymap, or whatever the variable `this-command' was set to by that
command.

The value `mode-exit' is special; it means that the previous command
read an event that told it to exit, and it did so and unread that event.
In other words, the present command is the event that made the previous
command exit.

The value `kill-region' is special; it means that the previous command
was a kill command.

`last-command' has a separate binding for each terminal device.
See Info node `(elisp)Multiple Terminals'.  */);

  DEFVAR_KBOARD ("real-last-command", Vreal_last_command,
		 doc: /* Same as `last-command', but never altered by Lisp code.
Taken from the previous value of `real-this-command'.  */);

  DEFVAR_KBOARD ("last-repeatable-command", Vlast_repeatable_command,
		 doc: /* Last command that may be repeated.
The last command executed that was not bound to an input event.
This is the command `repeat' will try to repeat.
Taken from a previous value of `real-this-command'.  */);

  DEFVAR_LISP ("this-command", Vthis_command,
	       doc: /* The command now being executed.
The command can set this variable; whatever is put here
will be in `last-command' during the following command.  */);
  Vthis_command = Qnil;

  DEFVAR_LISP ("real-this-command", Vreal_this_command,
	       doc: /* This is like `this-command', except that commands should never modify it.  */);
  Vreal_this_command = Qnil;

  DEFSYM (Qcurrent_minibuffer_command, "current-minibuffer-command");
  DEFVAR_LISP ("current-minibuffer-command", Vcurrent_minibuffer_command,
	       doc: /* This is like `this-command', but bound recursively.
Code running from (for instance) a minibuffer hook can check this variable
to see what command invoked the current minibuffer.  */);
  Vcurrent_minibuffer_command = Qnil;

  DEFVAR_LISP ("this-command-keys-shift-translated",
	       Vthis_command_keys_shift_translated,
	       doc: /* Non-nil if the key sequence activating this command was shift-translated.
Shift-translation occurs when there is no binding for the key sequence
as entered, but a binding was found by changing an upper-case letter
to lower-case, or a shifted function key to an unshifted one.  */);
  Vthis_command_keys_shift_translated = Qnil;

  DEFVAR_LISP ("this-original-command", Vthis_original_command,
	       doc: /* The command bound to the current key sequence before remapping.
It equals `this-command' if the original command was not remapped through
any of the active keymaps.  Otherwise, the value of `this-command' is the
result of looking up the original command in the active keymaps.  */);
  Vthis_original_command = Qnil;

  DEFVAR_INT ("auto-save-interval", auto_save_interval,
	      doc: /* Number of input events between auto-saves.
Zero means disable autosaving due to number of characters typed.  */);
  auto_save_interval = 300;

  DEFVAR_BOOL ("auto-save-no-message", auto_save_no_message,
	       doc: /* Non-nil means do not print any message when auto-saving. */);
  auto_save_no_message = false;

  DEFVAR_LISP ("auto-save-timeout", Vauto_save_timeout,
	       doc: /* Number of seconds idle time before auto-save.
Zero or nil means disable auto-saving due to idleness.
After auto-saving due to this many seconds of idle time,
Emacs also does a garbage collection if that seems to be warranted.  */);
  XSETFASTINT (Vauto_save_timeout, 30);

  DEFVAR_LISP ("echo-keystrokes", Vecho_keystrokes,
	       doc: /* Nonzero means echo unfinished commands after this many seconds of pause.
The value may be integer or floating point.
If the value is zero, don't echo at all.  */);
  Vecho_keystrokes = make_fixnum (1);

  DEFVAR_INT ("polling-period", polling_period,
	      doc: /* Interval between polling for input during Lisp execution.
The reason for polling is to make C-g work to stop a running program.
Polling is needed only when using X windows and SIGIO does not work.
Polling is automatically disabled in all other cases.  */);
  polling_period = 2;

  DEFVAR_LISP ("double-click-time", Vdouble_click_time,
	       doc: /* Maximum time between mouse clicks to make a double-click.
Measured in milliseconds.  The value nil means disable double-click
recognition; t means double-clicks have no time limit and are detected
by position only.  */);
  Vdouble_click_time = make_fixnum (500);

  DEFVAR_INT ("double-click-fuzz", double_click_fuzz,
	      doc: /* Maximum mouse movement between clicks to make a double-click.
On window-system frames, value is the number of pixels the mouse may have
moved horizontally or vertically between two clicks to make a double-click.
On non window-system frames, value is interpreted in units of 1/8 characters
instead of pixels.

This variable is also the threshold for motion of the mouse
to count as a drag.  */);
  double_click_fuzz = 3;

  DEFVAR_INT ("num-input-keys", num_input_keys,
	      doc: /* Number of complete key sequences read as input so far.
This includes key sequences read from keyboard macros.
The number is effectively the number of interactive command invocations.  */);
  num_input_keys = 0;

  DEFVAR_INT ("num-nonmacro-input-events", num_nonmacro_input_events,
	      doc: /* Number of input events read from the keyboard so far.
This does not include events generated by keyboard macros.  */);
  num_nonmacro_input_events = 0;

  DEFVAR_LISP ("last-event-frame", Vlast_event_frame,
	       doc: /* The frame in which the most recently read event occurred.
If the last event came from a keyboard macro, this is set to `macro'.  */);
  Vlast_event_frame = Qnil;

  /* This variable is set up in sysdep.c.  */
  DEFVAR_LISP ("tty-erase-char", Vtty_erase_char,
	       doc: /* The ERASE character as set by the user with stty.  */);

  DEFVAR_LISP ("help-char", Vhelp_char,
	       doc: /* Character to recognize as meaning Help.
When it is read, do `(eval help-form)', and display result if it's a string.
If the value of `help-form' is nil, this char can be read normally.  */);
  XSETINT (Vhelp_char, Ctl ('H'));

  DEFVAR_LISP ("help-event-list", Vhelp_event_list,
	       doc: /* List of input events to recognize as meaning Help.
These work just like the value of `help-char' (see that).  */);
  Vhelp_event_list = Qnil;

  DEFVAR_LISP ("help-form", Vhelp_form,
	       doc: /* Form to execute when character `help-char' is read.
If the form returns a string, that string is displayed.
If `help-form' is nil, the help char is not recognized.  */);
  Vhelp_form = Qnil;

  DEFVAR_LISP ("prefix-help-command", Vprefix_help_command,
	       doc: /* Command to run when `help-char' character follows a prefix key.
This command is used only when there is no actual binding
for that character after that prefix key.  */);
  Vprefix_help_command = Qnil;

  DEFVAR_LISP ("top-level", Vtop_level,
	       doc: /* Form to evaluate when Emacs starts up.
Useful to set before you dump a modified Emacs.  */);
  Vtop_level = Qnil;
  XSYMBOL (Qtop_level)->u.s.declared_special = false;

  DEFVAR_KBOARD ("keyboard-translate-table", Vkeyboard_translate_table,
                 doc: /* Translate table for local keyboard input, or nil.
If non-nil, the value should be a char-table.  Each character read
from the keyboard is looked up in this char-table.  If the value found
there is non-nil, then it is used instead of the actual input character.

The value can also be a string or vector, but this is considered obsolete.
If it is a string or vector of length N, character codes N and up are left
untranslated.  In a vector, an element which is nil means "no translation".

This is applied to the characters supplied to input methods, not their
output.  See also `translation-table-for-input'.

This variable has a separate binding for each terminal.
See Info node `(elisp)Multiple Terminals'.  */);

  DEFVAR_BOOL ("cannot-suspend", cannot_suspend,
	       doc: /* Non-nil means to always spawn a subshell instead of suspending.
\(Even if the operating system has support for stopping a process.)  */);
  cannot_suspend = false;

  DEFVAR_BOOL ("menu-prompting", menu_prompting,
	       doc: /* Non-nil means prompt with menus when appropriate.
This is done when reading from a keymap that has a prompt string,
for elements that have prompt strings.
The menu is displayed on the screen
if X menus were enabled at configuration
time and the previous event was a mouse click prefix key.
Otherwise, menu prompting uses the echo area.  */);
  menu_prompting = true;

  DEFVAR_LISP ("menu-prompt-more-char", menu_prompt_more_char,
	       doc: /* Character to see next line of menu prompt.
Type this character while in a menu prompt to rotate around the lines of it.  */);
  XSETINT (menu_prompt_more_char, ' ');

  DEFVAR_INT ("extra-keyboard-modifiers", extra_keyboard_modifiers,
	      doc: /* A mask of additional modifier keys to use with every keyboard character.
Emacs applies the modifiers of the character stored here to each keyboard
character it reads.  For example, after evaluating the expression
    (setq extra-keyboard-modifiers ?\\C-x)
all input characters will have the control modifier applied to them.

Note that the character ?\\C-@, equivalent to the integer zero, does
not count as a control character; rather, it counts as a character
with no modifiers; thus, setting `extra-keyboard-modifiers' to zero
cancels any modification.  */);
  extra_keyboard_modifiers = 0;

  DEFSYM (Qdeactivate_mark, "deactivate-mark");
  DEFVAR_LISP ("deactivate-mark", Vdeactivate_mark,
	       doc: /* If an editing command sets this to t, deactivate the mark afterward.
The command loop sets this to nil before each command,
and tests the value when the command returns.
Buffer modification stores t in this variable.  */);
  Vdeactivate_mark = Qnil;
  Fmake_variable_buffer_local (Qdeactivate_mark);

  DEFVAR_LISP ("pre-command-hook", Vpre_command_hook,
	       doc: /* Normal hook run before each command is executed.
If an unhandled error happens in running this hook,
the function in which the error occurred is unconditionally removed, since
otherwise the error might happen repeatedly and make Emacs nonfunctional.

See also `post-command-hook'.  */);
  Vpre_command_hook = Qnil;

  DEFVAR_LISP ("post-command-hook", Vpost_command_hook,
	       doc: /* Normal hook run after each command is executed.
If an unhandled error happens in running this hook,
the function in which the error occurred is unconditionally removed, since
otherwise the error might happen repeatedly and make Emacs nonfunctional.

It is a bad idea to use this hook for expensive processing.  If
unavoidable, wrap your code in `(while-no-input (redisplay) CODE)' to
avoid making Emacs unresponsive while the user types.

See also `pre-command-hook'.  */);
  Vpost_command_hook = Qnil;

#if 0
  DEFVAR_LISP ("echo-area-clear-hook", ...,
	       doc: /* Normal hook run when clearing the echo area.  */);
#endif
  DEFSYM (Qecho_area_clear_hook, "echo-area-clear-hook");
  Fset (Qecho_area_clear_hook, Qnil);

  DEFVAR_LISP ("lucid-menu-bar-dirty-flag", Vlucid_menu_bar_dirty_flag,
	       doc: /* Non-nil means menu bar, specified Lucid style, needs to be recomputed.  */);
  Vlucid_menu_bar_dirty_flag = Qnil;

  DEFVAR_LISP ("menu-bar-final-items", Vmenu_bar_final_items,
	       doc: /* List of menu bar items to move to the end of the menu bar.
The elements of the list are event types that may have menu bar
bindings.  The order of this list controls the order of the items.  */);
  Vmenu_bar_final_items = Qnil;

  DEFVAR_LISP ("tab-bar-separator-image-expression", Vtab_bar_separator_image_expression,
    doc: /* Expression evaluating to the image spec for a tab-bar separator.
This is used internally by graphical displays that do not render
tab-bar separators natively.  Otherwise it is unused (e.g. on GTK).  */);
  Vtab_bar_separator_image_expression = Qnil;

  DEFVAR_LISP ("tool-bar-separator-image-expression", Vtool_bar_separator_image_expression,
    doc: /* Expression evaluating to the image spec for a tool-bar separator.
This is used internally by graphical displays that do not render
tool-bar separators natively.  Otherwise it is unused (e.g. on GTK).  */);
  Vtool_bar_separator_image_expression = Qnil;

  DEFVAR_KBOARD ("overriding-terminal-local-map",
		 Voverriding_terminal_local_map,
		 doc: /* Per-terminal keymap that takes precedence over all other keymaps.
This variable is intended to let commands such as `universal-argument'
set up a different keymap for reading the next command.

`overriding-terminal-local-map' has a separate binding for each
terminal device.  See Info node `(elisp)Multiple Terminals'.  */);

  DEFVAR_LISP ("overriding-local-map", Voverriding_local_map,
	       doc: /* Keymap that replaces (overrides) local keymaps.
If this variable is non-nil, Emacs looks up key bindings in this
keymap INSTEAD OF `keymap' text properties, `local-map' and `keymap'
overlay properties, minor mode maps, and the buffer's local map.

Hence, the only active keymaps would be `overriding-terminal-local-map',
this keymap, and `global-keymap', in order of precedence.  */);
  Voverriding_local_map = Qnil;

  DEFVAR_LISP ("overriding-local-map-menu-flag", Voverriding_local_map_menu_flag,
	       doc: /* Non-nil means `overriding-local-map' applies to the menu bar.
Otherwise, the menu bar continues to reflect the buffer's local map
and the minor mode maps regardless of `overriding-local-map'.  */);
  Voverriding_local_map_menu_flag = Qnil;

  DEFVAR_LISP ("special-event-map", Vspecial_event_map,
	       doc: /* Keymap defining bindings for special events to execute at low level.  */);
  Vspecial_event_map = list1 (Qkeymap);

  DEFVAR_LISP ("track-mouse", track_mouse,
	       doc: /* Non-nil means generate motion events for mouse motion.
The special values `dragging' and `dropping' assert that the mouse
cursor retains its appearance during mouse motion.  Any non-nil value
but `dropping' asserts that motion events always relate to the frame
where the mouse movement started.  The value `dropping' asserts
that motion events relate to the frame where the mouse cursor is seen
when generating the event.  If there's no such frame, such motion
events relate to the frame where the mouse movement started.  */);

  DEFVAR_KBOARD ("system-key-alist", Vsystem_key_alist,
		 doc: /* Alist of system-specific X windows key symbols.
Each element should have the form (N . SYMBOL) where N is the
numeric keysym code (sans the \"system-specific\" bit 1<<28)
and SYMBOL is its name.

`system-key-alist' has a separate binding for each terminal device.
See Info node `(elisp)Multiple Terminals'.  */);

  DEFVAR_KBOARD ("local-function-key-map", Vlocal_function_key_map,
                 doc: /* Keymap that translates key sequences to key sequences during input.
This is used mainly for mapping key sequences into some preferred
key events (symbols).

The `read-key-sequence' function replaces any subsequence bound by
`local-function-key-map' with its binding.  More precisely, when the
active keymaps have no binding for the current key sequence but
`local-function-key-map' binds a suffix of the sequence to a vector or
string, `read-key-sequence' replaces the matching suffix with its
binding, and continues with the new sequence.

If the binding is a function, it is called with one argument (the prompt)
and its return value (a key sequence) is used.

The events that come from bindings in `local-function-key-map' are not
themselves looked up in `local-function-key-map'.

For example, suppose `local-function-key-map' binds `ESC O P' to [f1].
Typing `ESC O P' to `read-key-sequence' would return [f1].  Typing
`C-x ESC O P' would return [?\\C-x f1].  If [f1] were a prefix key,
typing `ESC O P x' would return [f1 x].

`local-function-key-map' has a separate binding for each terminal
device.  See Info node `(elisp)Multiple Terminals'.  If you need to
define a binding on all terminals, change `function-key-map'
instead.  Initially, `local-function-key-map' is an empty keymap that
has `function-key-map' as its parent on all terminal devices.  */);

  DEFVAR_KBOARD ("input-decode-map", Vinput_decode_map,
		 doc: /* Keymap that decodes input escape sequences.
This is used mainly for mapping ASCII function key sequences into
real Emacs function key events (symbols).

The `read-key-sequence' function replaces any subsequence bound by
`input-decode-map' with its binding.  Contrary to `function-key-map',
this map applies its rebinding regardless of the presence of an ordinary
binding.  So it is more like `key-translation-map' except that it applies
before `function-key-map' rather than after.

If the binding is a function, it is called with one argument (the prompt)
and its return value (a key sequence) is used.

The events that come from bindings in `input-decode-map' are not
themselves looked up in `input-decode-map'.  */);

  DEFVAR_LISP ("function-key-map", Vfunction_key_map,
               doc: /* The parent keymap of all `local-function-key-map' instances.
Function key definitions that apply to all terminal devices should go
here.  If a mapping is defined in both the current
`local-function-key-map' binding and this variable, then the local
definition will take precedence.  */);
  Vfunction_key_map = Fmake_sparse_keymap (Qnil);

  DEFVAR_LISP ("key-translation-map", Vkey_translation_map,
               doc: /* Keymap of key translations that can override keymaps.
This keymap works like `input-decode-map', but comes after `function-key-map'.
Another difference is that it is global rather than terminal-local.  */);
  Vkey_translation_map = Fmake_sparse_keymap (Qnil);

  DEFVAR_LISP ("deferred-action-list", Vdeferred_action_list,
	       doc: /* List of deferred actions to be performed at a later time.
The precise format isn't relevant here; we just check whether it is nil.  */);
  Vdeferred_action_list = Qnil;

  DEFVAR_LISP ("deferred-action-function", Vdeferred_action_function,
	       doc: /* Function to call to handle deferred actions, after each command.
This function is called with no arguments after each command
whenever `deferred-action-list' is non-nil.  */);
  Vdeferred_action_function = Qnil;

  DEFVAR_LISP ("delayed-warnings-list", Vdelayed_warnings_list,
               doc: /* List of warnings to be displayed after this command.
Each element must be a list (TYPE MESSAGE [LEVEL [BUFFER-NAME]]),
as per the args of `display-warning' (which see).
If this variable is non-nil, `delayed-warnings-hook' will be run
immediately after running `post-command-hook'.  */);
  Vdelayed_warnings_list = Qnil;

  DEFVAR_LISP ("timer-list", Vtimer_list,
	       doc: /* List of active absolute time timers in order of increasing time.  */);
  Vtimer_list = Qnil;

  DEFVAR_LISP ("timer-idle-list", Vtimer_idle_list,
	       doc: /* List of active idle-time timers in order of increasing time.  */);
  Vtimer_idle_list = Qnil;

  DEFVAR_LISP ("input-method-function", Vinput_method_function,
	       doc: /* If non-nil, the function that implements the current input method.
It's called with one argument, which must be a single-byte
character that was just read.  Any single-byte character is
acceptable, except the DEL character, codepoint 127 decimal, 177 octal.
Typically this function uses `read-event' to read additional events.
When it does so, it should first bind `input-method-function' to nil
so it will not be called recursively.

The function should return a list of zero or more events
to be used as input.  If it wants to put back some events
to be reconsidered, separately, by the input method,
it can add them to the beginning of `unread-command-events'.

The input method function can find in `input-method-previous-message'
the previous echo area message.

The input method function should refer to the variables
`input-method-use-echo-area' and `input-method-exit-on-first-char'
for guidance on what to do.  */);
  Vinput_method_function = Qlist;

  DEFVAR_LISP ("input-method-previous-message",
	       Vinput_method_previous_message,
	       doc: /* When `input-method-function' is called, hold the previous echo area message.
This variable exists because `read-event' clears the echo area
before running the input method.  It is nil if there was no message.  */);
  Vinput_method_previous_message = Qnil;

  DEFVAR_LISP ("show-help-function", Vshow_help_function,
	       doc: /* If non-nil, the function that implements the display of help.
It's called with one argument, the help string to display.  */);
  Vshow_help_function = Qnil;

  DEFVAR_LISP ("disable-point-adjustment", Vdisable_point_adjustment,
	       doc: /* If non-nil, suppress point adjustment after executing a command.

After a command is executed, if point moved into a region that has
special properties (e.g. composition, display), Emacs adjusts point to
the boundary of the region.  But when a command leaves this variable at
a non-nil value (e.g., with a setq), this point adjustment is suppressed.

This variable is set to nil before reading a command, and is checked
just after executing the command.  */);
  Vdisable_point_adjustment = Qnil;

  DEFVAR_LISP ("global-disable-point-adjustment",
	       Vglobal_disable_point_adjustment,
	       doc: /* If non-nil, always suppress point adjustments.

The default value is nil, in which case point adjustments are
suppressed only after special commands that leave
`disable-point-adjustment' (which see) at a non-nil value.  */);
  Vglobal_disable_point_adjustment = Qnil;

  DEFVAR_LISP ("minibuffer-message-timeout", Vminibuffer_message_timeout,
	       doc: /* How long to display an echo-area message when the minibuffer is active.
If the value is a number, it should be specified in seconds.
If the value is not a number, such messages never time out.  */);
  Vminibuffer_message_timeout = make_fixnum (2);

  DEFVAR_LISP ("throw-on-input", Vthrow_on_input,
	       doc: /* If non-nil, any keyboard input throws to this symbol.
The value of that variable is passed to `quit-flag' and later causes a
peculiar kind of quitting.  */);
  Vthrow_on_input = Qnil;

  DEFVAR_LISP ("command-error-function", Vcommand_error_function,
	       doc: /* Function to output error messages.
Called with three arguments:
- the error data, a list of the form (SIGNALED-CONDITION . SIGNAL-DATA)
  such as what `condition-case' would bind its variable to,
- the context (a string which normally goes at the start of the message),
- the Lisp function within which the error was signaled.

Also see `set-message-function' (which controls how non-error messages
are displayed).  */);
  Vcommand_error_function = intern ("command-error-default-function");

  DEFVAR_LISP ("enable-disabled-menus-and-buttons",
	       Venable_disabled_menus_and_buttons,
	       doc: /* If non-nil, don't ignore events produced by disabled menu items and tool-bar.

Help functions bind this to allow help on disabled menu items
and tool-bar buttons.  */);
  Venable_disabled_menus_and_buttons = Qnil;

  DEFVAR_LISP ("select-active-regions",
	       Vselect_active_regions,
	       doc: /* If non-nil, an active region automatically sets the primary selection.
If the value is `only', only temporarily active regions (usually made
by mouse-dragging or shift-selection) set the window selection.

This takes effect only when Transient Mark mode is enabled.  */);
  Vselect_active_regions = Qt;

  DEFVAR_LISP ("saved-region-selection",
	       Vsaved_region_selection,
	       doc: /* Contents of active region prior to buffer modification.
If `select-active-regions' is non-nil, Emacs sets this to the
text in the region before modifying the buffer.  The next call to
the function `deactivate-mark' uses this to set the window selection.  */);
  Vsaved_region_selection = Qnil;

  DEFVAR_LISP ("selection-inhibit-update-commands",
	       Vselection_inhibit_update_commands,
	       doc: /* List of commands which should not update the selection.
Normally, if `select-active-regions' is non-nil and the mark remains
active after a command (i.e. the mark was not deactivated), the Emacs
command loop sets the selection to the text in the region.  However,
if the command is in this list, the selection is not updated.  */);
  Vselection_inhibit_update_commands
    = list2 (Qhandle_switch_frame, Qhandle_select_window);

  DEFVAR_LISP ("debug-on-event",
               Vdebug_on_event,
               doc: /* Enter debugger on this event.
When Emacs receives the special event specified by this variable,
it will try to break into the debugger as soon as possible instead
of processing the event normally through `special-event-map'.

Currently, the only supported values for this
variable are `sigusr1' and `sigusr2'.  */);
  Vdebug_on_event = intern_c_string ("sigusr2");

  DEFVAR_BOOL ("attempt-stack-overflow-recovery",
               attempt_stack_overflow_recovery,
               doc: /* If non-nil, attempt to recover from C stack overflows.
This recovery is potentially unsafe and may lead to deadlocks or data
corruption, but it usually works and may preserve modified buffers
that would otherwise be lost.  If nil, treat stack overflow like any
other kind of crash or fatal error.  */);
  attempt_stack_overflow_recovery = true;

  DEFVAR_BOOL ("attempt-orderly-shutdown-on-fatal-signal",
               attempt_orderly_shutdown_on_fatal_signal,
               doc: /* If non-nil, attempt orderly shutdown on fatal signals.
By default this variable is non-nil, and Emacs attempts to perform
an orderly shutdown when it catches a fatal signal (e.g., a crash).
The orderly shutdown includes an attempt to auto-save your unsaved edits
and other useful cleanups.  These cleanups are potentially unsafe and may
lead to deadlocks or data corruption, but it usually works and may
preserve data in modified buffers that would otherwise be lost.
If nil, Emacs crashes immediately in response to fatal signals.  */);
  attempt_orderly_shutdown_on_fatal_signal = true;

  DEFVAR_LISP ("while-no-input-ignore-events",
               Vwhile_no_input_ignore_events,
               doc: /* Ignored events from while-no-input.  */);

  pdumper_do_now_and_after_load (syms_of_keyboard_for_pdumper);
}

static void
syms_of_keyboard_for_pdumper (void)
{
  /* Make sure input state is pristine when restoring from a dump.
     init_keyboard() also resets some of these, but the duplication
     doesn't hurt and makes sure that allocate_kboard and subsequent
     early init functions see the environment they expect.  */

  PDUMPER_RESET_LV (pending_funcalls, Qnil);
  PDUMPER_RESET_LV (unread_switch_frame, Qnil);
  PDUMPER_RESET_LV (internal_last_event_frame, Qnil);
  PDUMPER_RESET_LV (last_command_event, Qnil);
  PDUMPER_RESET_LV (last_nonmenu_event, Qnil);
  PDUMPER_RESET_LV (last_input_event, Qnil);
  PDUMPER_RESET_LV (Vunread_command_events, Qnil);
  PDUMPER_RESET_LV (Vunread_post_input_method_events, Qnil);
  PDUMPER_RESET_LV (Vunread_input_method_events, Qnil);
  PDUMPER_RESET_LV (Vthis_command, Qnil);
  PDUMPER_RESET_LV (Vreal_this_command, Qnil);
  PDUMPER_RESET_LV (Vthis_command_keys_shift_translated, Qnil);
  PDUMPER_RESET_LV (Vthis_original_command, Qnil);
  PDUMPER_RESET (num_input_keys, 0);
  PDUMPER_RESET (num_nonmacro_input_events, 0);
  PDUMPER_RESET_LV (Vlast_event_frame, Qnil);
  PDUMPER_RESET_LV (Vdeferred_action_list, Qnil);
  PDUMPER_RESET_LV (Vdelayed_warnings_list, Qnil);

  /* Create the initial keyboard.  Qt means 'unset'.  */
  eassert (initial_kboard == NULL);
  initial_kboard = allocate_kboard (Qt);
}

void
keys_of_keyboard (void)
{
  initial_define_lispy_key (Vspecial_event_map, "delete-frame",
			    "handle-delete-frame");
#ifdef HAVE_NTGUI
  initial_define_lispy_key (Vspecial_event_map, "end-session",
			    "kill-emacs");
#endif
  initial_define_lispy_key (Vspecial_event_map, "ns-put-working-text",
			    "ns-put-working-text");
  initial_define_lispy_key (Vspecial_event_map, "ns-unput-working-text",
			    "ns-unput-working-text");
  /* Here we used to use `ignore-event' which would simple set prefix-arg to
     current-prefix-arg, as is done in `handle-switch-frame'.
     But `handle-switch-frame is not run from the special-map.
     Commands from that map are run in a special way that automatically
     preserves the prefix-arg.  Restoring the prefix arg here is not just
     redundant but harmful:
     - C-u C-x v =
     - current-prefix-arg is set to non-nil, prefix-arg is set to nil.
     - after the first prompt, the exit-minibuffer-hook is run which may
       iconify a frame and thus push a `iconify-frame' event.
     - after running exit-minibuffer-hook, current-prefix-arg is
       restored to the non-nil value it had before the prompt.
     - we enter the second prompt.
       current-prefix-arg is non-nil, prefix-arg is nil.
     - before running the first real event, we run the special iconify-frame
       event, but we pass the `special' arg to command-execute so
       current-prefix-arg and prefix-arg are left untouched.
     - here we foolishly copy the non-nil current-prefix-arg to prefix-arg.
     - the next key event will have a spuriously non-nil current-prefix-arg.  */
  initial_define_lispy_key (Vspecial_event_map, "iconify-frame",
			    "ignore");
  initial_define_lispy_key (Vspecial_event_map, "make-frame-visible",
			    "ignore");
  /* Handling it at such a low-level causes read_key_sequence to get
   * confused because it doesn't realize that the current_buffer was
   * changed by read_char.
   *
   * initial_define_lispy_key (Vspecial_event_map, "select-window",
   * 			    "handle-select-window"); */
  initial_define_lispy_key (Vspecial_event_map, "save-session",
			    "handle-save-session");

#ifdef HAVE_DBUS
  /* Define a special event which is raised for dbus callback
     functions.  */
  initial_define_lispy_key (Vspecial_event_map, "dbus-event",
			    "dbus-handle-event");
#endif

#ifdef THREADS_ENABLED
  /* Define a special event which is raised for thread signals.  */
  initial_define_lispy_key (Vspecial_event_map, "thread-event",
			    "thread-handle-event");
#endif

#ifdef USE_FILE_NOTIFY
  /* Define a special event which is raised for notification callback
     functions.  */
  initial_define_lispy_key (Vspecial_event_map, "file-notify",
                            "file-notify-handle-event");
#endif /* USE_FILE_NOTIFY */

  initial_define_lispy_key (Vspecial_event_map, "config-changed-event",
			    "ignore");
#if defined (WINDOWSNT)
  initial_define_lispy_key (Vspecial_event_map, "language-change",
			    "ignore");
#endif
  initial_define_lispy_key (Vspecial_event_map, "focus-in",
			    "handle-focus-in");
  initial_define_lispy_key (Vspecial_event_map, "focus-out",
			    "handle-focus-out");
  initial_define_lispy_key (Vspecial_event_map, "move-frame",
			    "handle-move-frame");
}

/* Mark the pointers in the kboard objects.
   Called by Fgarbage_collect.  */
void
mark_kboards (void)
{
  for (KBOARD *kb = all_kboards; kb; kb = kb->next_kboard)
    {
      if (kb->kbd_macro_buffer)
	mark_objects (kb->kbd_macro_buffer,
		      kb->kbd_macro_ptr - kb->kbd_macro_buffer);
      mark_object (KVAR (kb, Voverriding_terminal_local_map));
      mark_object (KVAR (kb, Vlast_command));
      mark_object (KVAR (kb, Vreal_last_command));
      mark_object (KVAR (kb, Vkeyboard_translate_table));
      mark_object (KVAR (kb, Vlast_repeatable_command));
      mark_object (KVAR (kb, Vprefix_arg));
      mark_object (KVAR (kb, Vlast_prefix_arg));
      mark_object (KVAR (kb, kbd_queue));
      mark_object (KVAR (kb, defining_kbd_macro));
      mark_object (KVAR (kb, Vlast_kbd_macro));
      mark_object (KVAR (kb, Vsystem_key_alist));
      mark_object (KVAR (kb, system_key_syms));
      mark_object (KVAR (kb, Vwindow_system));
      mark_object (KVAR (kb, Vinput_decode_map));
      mark_object (KVAR (kb, Vlocal_function_key_map));
      mark_object (KVAR (kb, Vdefault_minibuffer_frame));
      mark_object (KVAR (kb, echo_string));
      mark_object (KVAR (kb, echo_prompt));
    }

  for (union buffered_input_event *event = kbd_fetch_ptr;
       event != kbd_store_ptr; event = next_kbd_event (event))
    {
      /* These two special event types have no Lisp_Objects to mark.  */
      if (event->kind != SELECTION_REQUEST_EVENT
	  && event->kind != SELECTION_CLEAR_EVENT)
	{
	  mark_object (event->ie.x);
	  mark_object (event->ie.y);
	  mark_object (event->ie.frame_or_window);
	  mark_object (event->ie.arg);
	}
    }
}

debug log:

solving 81ff9df153 ...
found 81ff9df153 in https://git.savannah.gnu.org/cgit/emacs.git

(*) Git path names are given by the tree(s) the blob belongs to.
    Blobs themselves have no identifier aside from the hash of its contents.^

Code repositories for project(s) associated with this public inbox

	https://git.savannah.gnu.org/cgit/emacs.git

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).