unofficial mirror of bug-gnu-emacs@gnu.org 
 help / color / mirror / code / Atom feed
blob 99c014e310e4113c8f8a7479a5e255e583706db0 130841 bytes (raw)
name: lisp/international/mule-cmds.el 	 # 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
 
;;; mule-cmds.el --- commands for multilingual environment  -*- lexical-binding:t -*-

;; Copyright (C) 1997-2020 Free Software Foundation, Inc.
;; Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
;;   2005, 2006, 2007, 2008, 2009, 2010, 2011
;;   National Institute of Advanced Industrial Science and Technology (AIST)
;;   Registration Number H14PRO021
;; Copyright (C) 2003
;;   National Institute of Advanced Industrial Science and Technology (AIST)
;;   Registration Number H13PRO009

;; Keywords: mule, i18n

;; 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/>.

;;; Commentary:

;;; Code:

(eval-when-compile (require 'cl-lib))

(defvar dos-codepage)
(autoload 'widget-value "wid-edit")

;;; MULE related key bindings and menus.

(defvar mule-keymap
  (let ((map (make-sparse-keymap)))
    (define-key map "f" 'set-buffer-file-coding-system)
    (define-key map "r" 'revert-buffer-with-coding-system)
    (define-key map "F" 'set-file-name-coding-system)
    (define-key map "t" 'set-terminal-coding-system)
    (define-key map "k" 'set-keyboard-coding-system)
    (define-key map "p" 'set-buffer-process-coding-system)
    (define-key map "x" 'set-selection-coding-system)
    (define-key map "X" 'set-next-selection-coding-system)
    (define-key map "\C-\\" 'set-input-method)
    (define-key map "c" 'universal-coding-system-argument)
    (define-key map "l" 'set-language-environment)
    map)
  "Keymap for Mule (Multilingual environment) specific commands.")

;; Keep "C-x C-m ..." for mule specific commands.
(define-key ctl-x-map "\C-m" mule-keymap)
(define-key ctl-x-map "\\" 'activate-transient-input-method)

(defvar describe-language-environment-map
  (let ((map (make-sparse-keymap "Describe Language Environment")))
    (bindings--define-key map
      [Default] '(menu-item "Default" describe-specified-language-support))
    map))

(defvar setup-language-environment-map
  (let ((map (make-sparse-keymap "Set Language Environment")))
    (bindings--define-key map
      [Default] '(menu-item "Default" setup-specified-language-environment))
    map))

(defvar set-coding-system-map
  (let ((map (make-sparse-keymap "Set Coding System")))
    (bindings--define-key map [set-buffer-process-coding-system]
      '(menu-item "For I/O with Subprocess" set-buffer-process-coding-system
        :visible (fboundp 'make-process)
        :enable (get-buffer-process (current-buffer))
        :help "How to en/decode I/O from/to subprocess connected to this buffer"))
    (bindings--define-key map [set-next-selection-coding-system]
      '(menu-item "For Next X Selection" set-next-selection-coding-system
        :visible (display-selections-p)
        :help "How to en/decode next selection/clipboard operation"))
    (bindings--define-key map [set-selection-coding-system]
      '(menu-item "For X Selections/Clipboard" set-selection-coding-system
        :visible (display-selections-p)
        :help "How to en/decode data to/from selection/clipboard"))

    (bindings--define-key map [separator-3] menu-bar-separator)
    (bindings--define-key map [set-terminal-coding-system]
      '(menu-item "For Terminal" set-terminal-coding-system
        :enable (null (memq initial-window-system '(x w32 ns)))
        :help "How to encode terminal output"))
    (bindings--define-key map [set-keyboard-coding-system]
      '(menu-item "For Keyboard" set-keyboard-coding-system
        :help "How to decode keyboard input"))

    (bindings--define-key map [separator-2] menu-bar-separator)
    (bindings--define-key map [set-file-name-coding-system]
      '(menu-item "For File Name" set-file-name-coding-system
        :help "How to decode/encode file names"))
    (bindings--define-key map [revert-buffer-with-coding-system]
      '(menu-item "For Reverting This File Now"
        revert-buffer-with-coding-system
        :enable buffer-file-name
        :help "Revisit this file immediately using specified coding system"))
    (bindings--define-key map [set-buffer-file-coding-system]
      '(menu-item "For Saving This Buffer" set-buffer-file-coding-system
        :help "How to encode this buffer when saved"))
    (bindings--define-key map [separator-1] menu-bar-separator)
    (bindings--define-key map [universal-coding-system-argument]
      '(menu-item "For Next Command" universal-coding-system-argument
        :help "Coding system to be used by next command"))
    map))

(defvar mule-menu-keymap
  (let ((map (make-sparse-keymap "Mule (Multilingual Environment)")))
    (bindings--define-key map [mule-diag]
      '(menu-item "Show All Multilingual Settings" mule-diag
        :help "Display multilingual environment settings"))
    (bindings--define-key map [list-character-sets]
      '(menu-item "List Character Sets" list-character-sets
        :help "Show table of available character sets"))
    (bindings--define-key map [describe-coding-system]
      '(menu-item "Describe Coding System..." describe-coding-system))
    (bindings--define-key map [describe-input-method]
      '(menu-item "Describe Input Method..." describe-input-method
        :help "Keyboard layout for a specific input method"))
    (bindings--define-key map [describe-language-environment]
      `(menu-item "Describe Language Environment"
            ,describe-language-environment-map
            :help "Show multilingual settings for a specific language"))

    (bindings--define-key map [separator-coding-system] menu-bar-separator)
    (bindings--define-key map [view-hello-file]
      '(menu-item "Show Multilingual Sample Text" view-hello-file
        :enable (file-readable-p
                 (expand-file-name "HELLO" data-directory))
        :help "Demonstrate various character sets"))
    (bindings--define-key map [set-various-coding-system]
      `(menu-item "Set Coding Systems" ,set-coding-system-map))

    (bindings--define-key map [separator-input-method] menu-bar-separator)
    (bindings--define-key map [activate-transient-input-method]
      '(menu-item "Transient Input Method" activate-transient-input-method))
    (bindings--define-key map [set-input-method]
      '(menu-item "Select Input Method..." set-input-method))
    (bindings--define-key map [toggle-input-method]
      '(menu-item "Toggle Input Method" toggle-input-method))

    (bindings--define-key map [separator-mule] menu-bar-separator)
    (bindings--define-key map [set-language-environment]
      `(menu-item  "Set Language Environment" ,setup-language-environment-map))
    map)
  "Keymap for Mule (Multilingual environment) menu specific commands.")

;; This should be a single character key binding because users use it
;; very frequently while editing multilingual text.  Now we can use
;; only two such keys: "\C-\\" and "\C-^", but the latter is not
;; convenient because it requires shifting on most keyboards.  An
;; alternative is "\C-]" which is now bound to `abort-recursive-edit'
;; but it won't be used that frequently.
(define-key global-map "\C-\\" 'toggle-input-method)

;; This is no good because people often type Shift-SPC
;; meaning to type SPC.  -- rms.
;; ;; Here's an alternative key binding for X users (Shift-SPACE).
;; (define-key global-map [?\S- ] 'toggle-input-method)

;;; Mule related hyperlinks.
(defconst help-xref-mule-regexp-template
  (purecopy (concat "\\(\\<\\("
		    "\\(coding system\\)\\|"
		    "\\(input method\\)\\|"
		    "\\(character set\\)\\|"
		    "\\(charset\\)"
		    "\\)\\s-+\\)?"
		    ;; Note starting with word-syntax character:
		    "['`‘]\\(\\sw\\(\\sw\\|\\s_\\)+\\)['’]")))

(defun coding-system-change-eol-conversion (coding-system eol-type)
  "Return a coding system which differs from CODING-SYSTEM in EOL conversion.
The returned coding system converts end-of-line by EOL-TYPE
but text as the same way as CODING-SYSTEM.
EOL-TYPE should be `unix', `dos', `mac', or nil.
If EOL-TYPE is nil, the returned coding system detects
how end-of-line is formatted automatically while decoding.

EOL-TYPE can be specified by an integer 0, 1, or 2.
They means `unix', `dos', and `mac' respectively."
  (if (symbolp eol-type)
      (setq eol-type (cond ((eq eol-type 'unix) 0)
			   ((eq eol-type 'dos) 1)
			   ((eq eol-type 'mac) 2)
			   (t eol-type))))
  ;; We call `coding-system-base' before `coding-system-eol-type',
  ;; because the coding-system may not be initialized until then.
  (let* ((base (coding-system-base coding-system))
	 (orig-eol-type (coding-system-eol-type coding-system)))
    (cond ((vectorp orig-eol-type)
	   (if (not eol-type)
	       coding-system
	     (aref orig-eol-type eol-type)))
	  ((not eol-type)
	   base)
	  ((= eol-type orig-eol-type)
	   coding-system)
	  ((progn (setq orig-eol-type (coding-system-eol-type base))
		  (vectorp orig-eol-type))
	   (aref orig-eol-type eol-type)))))

(defun coding-system-change-text-conversion (coding-system coding)
  "Return a coding system which differs from CODING-SYSTEM in text conversion.
The returned coding system converts text by CODING
but end-of-line as the same way as CODING-SYSTEM.
If CODING is nil, the returned coding system detects
how text is formatted automatically while decoding."
  (let ((eol-type (coding-system-eol-type coding-system)))
    (coding-system-change-eol-conversion
     (if coding coding 'undecided)
     (if (numberp eol-type) (aref [unix dos mac] eol-type)))))

;; Canonicalize the coding system name NAME by removing some prefixes
;; and delimiter characters.  Support function of
;; coding-system-from-name.
(defun canonicalize-coding-system-name (name)
  (if (string-match "^\\(ms\\|ibm\\|windows-\\)\\([0-9]+\\)$" name)
      ;; "ms950", "ibm950", "windows-950" -> "cp950"
      (concat "cp" (match-string 2 name))
    (if (string-match "^iso[-_ ]?[0-9]" name)
	;; "iso-8859-1" -> "8859-1", "iso-2022-jp" ->"2022-jp"
	(setq name (substring name (1- (match-end 0)))))
    (let ((idx (string-match "[-_ /]" name)))
      ;; Delete "-", "_", " ", "/" but do distinguish "16-be" and "16be".
      (while idx
	(if (and (>= idx 2)
		 (eq (string-match "16-[lb]e$" name (- idx 2))
		     (- idx 2)))
	    (setq idx (string-match "[-_ /]" name (match-end 0)))
	  (setq name (concat (substring name 0 idx) (substring name (1+ idx)))
		idx (string-match "[-_ /]" name idx))))
      name)))

(defun coding-system-from-name (name)
  "Return a coding system whose name matches with NAME (string or symbol)."
  (let (sym)
    (if (stringp name) (setq sym (intern name))
      (setq sym name name (symbol-name name)))
    (if (coding-system-p sym)
	sym
      (let ((eol-type
	     (if (string-match "-\\(unix\\|dos\\|mac\\)$" name)
		 (prog1 (intern (match-string 1 name))
		   (setq name (substring name 0 (match-beginning 0)))))))
	(setq name (canonicalize-coding-system-name (downcase name)))
	(catch 'tag
	  (dolist (elt (coding-system-list))
	    (if (string= (canonicalize-coding-system-name (symbol-name elt))
			 name)
		(throw 'tag (if eol-type (coding-system-change-eol-conversion
					  elt eol-type)
			      elt)))))))))

(defun toggle-enable-multibyte-characters (&optional arg)
  "Change whether this buffer uses multibyte characters.
With ARG, use multibyte characters if the ARG is positive.

Note that this command does not convert the byte contents of
the buffer; it only changes the way those bytes are interpreted.
In general, therefore, this command *changes* the sequence of
characters that the current buffer contains.

We suggest you avoid using this command unless you know what you are
doing.  If you use it by mistake, and the buffer is now displayed
wrong, use this command again to toggle back to the right mode."
  (interactive "P")
  (let ((new-flag
	 (if (null arg) (null enable-multibyte-characters)
	   (> (prefix-numeric-value arg) 0))))
    (set-buffer-multibyte new-flag))
  (force-mode-line-update))

(defun view-hello-file ()
  "Display the HELLO file, which lists many languages and characters."
  (interactive)
  (view-file (expand-file-name "HELLO" data-directory)))

(defvar mule-cmds--prefixed-command-next-coding-system nil)
(defvar mule-cmds--prefixed-command-last-coding-system nil)

(defun mule-cmds--prefixed-command-pch ()
  (if (not mule-cmds--prefixed-command-next-coding-system)
      (progn
        (remove-hook 'pre-command-hook #'mule-cmds--prefixed-command-pch)
        (remove-hook 'prefix-command-echo-keystrokes-functions
                     #'mule-cmds--prefixed-command-echo)
        (remove-hook 'prefix-command-preserve-state-hook
                     #'mule-cmds--prefixed-command-preserve))
    (setq this-command
          (let ((cmd this-command)
                (coding-system mule-cmds--prefixed-command-next-coding-system))
            (lambda ()
              (interactive)
              (setq this-command cmd)
              (let ((coding-system-for-read coding-system)
	            (coding-system-for-write coding-system)
	            (coding-system-require-warning t))
	        (call-interactively cmd)))))
    (setq mule-cmds--prefixed-command-last-coding-system
          mule-cmds--prefixed-command-next-coding-system)
    (setq mule-cmds--prefixed-command-next-coding-system nil)))

(defun mule-cmds--prefixed-command-echo ()
  (when mule-cmds--prefixed-command-next-coding-system
    (format "With coding-system %S"
            mule-cmds--prefixed-command-next-coding-system)))

(defun mule-cmds--prefixed-command-preserve ()
  (setq mule-cmds--prefixed-command-next-coding-system
        mule-cmds--prefixed-command-last-coding-system))

(defun universal-coding-system-argument (coding-system)
  "Execute an I/O command using the specified CODING-SYSTEM."
  (interactive
   (let ((default (and buffer-file-coding-system
		       (not (eq (coding-system-type buffer-file-coding-system)
				'undecided))
		       buffer-file-coding-system)))
     (list (read-coding-system
            (format-prompt "Coding system for following command" default)
	    default))))
  (prefix-command-preserve-state)
  (setq mule-cmds--prefixed-command-next-coding-system coding-system)
  (add-hook 'pre-command-hook #'mule-cmds--prefixed-command-pch)
  (add-hook 'prefix-command-echo-keystrokes-functions
            #'mule-cmds--prefixed-command-echo)
  (add-hook 'prefix-command-preserve-state-hook
            #'mule-cmds--prefixed-command-preserve))

(defun set-default-coding-systems (coding-system)
  "Set default value of various coding systems to CODING-SYSTEM.
This sets the following coding systems:
  o coding system of a newly created buffer
  o default coding system for subprocess I/O
This also sets the following values:
  o default value used as `file-name-coding-system' for converting file names
      if CODING-SYSTEM is ASCII-compatible
  o default value for the command `set-terminal-coding-system'
  o default value for the command `set-keyboard-coding-system'
      if CODING-SYSTEM is ASCII-compatible"
  (check-coding-system coding-system)
  (setq-default buffer-file-coding-system coding-system)

  (if (eq system-type 'darwin)
      ;; The file-name coding system on Darwin systems is always utf-8.
      (setq default-file-name-coding-system 'utf-8-unix)
    (if (and (or (not coding-system)
		 (coding-system-get coding-system 'ascii-compatible-p)))
	(setq default-file-name-coding-system
	      (coding-system-change-eol-conversion coding-system 'unix))))
  (setq default-terminal-coding-system coding-system)
  ;; Prevent default-terminal-coding-system from converting ^M to ^J.
  (setq default-keyboard-coding-system
	(coding-system-change-eol-conversion coding-system 'unix))
  ;; Preserve eol-type from existing default-process-coding-systems.
  ;; On non-unix-like systems in particular, these may have been set
  ;; carefully by the user, or by the startup code, to deal with the
  ;; users shell appropriately, so should not be altered by changing
  ;; language environment.
  (let ((output-coding
	 (coding-system-change-text-conversion
	  (car default-process-coding-system) coding-system))
	(input-coding
	 (coding-system-change-text-conversion
	  (cdr default-process-coding-system) coding-system)))
    (setq default-process-coding-system
	  (cons output-coding input-coding))))

(defun prefer-coding-system (coding-system)
  "Add CODING-SYSTEM at the front of the priority list for automatic detection.
This also sets the following coding systems:
  o coding system of a newly created buffer
  o default coding system for subprocess I/O
This also sets the following values:
  o default value used as `file-name-coding-system' for converting file names
  o default value for the command `set-terminal-coding-system'
  o default value for the command `set-keyboard-coding-system'

If CODING-SYSTEM specifies a certain type of EOL conversion, the coding
systems set by this function will use that type of EOL conversion.

A coding system that requires automatic detection of text+encoding
\(e.g. undecided, unix) can't be preferred.

To prefer, for instance, utf-8, say the following:

  (prefer-coding-system \\='utf-8)"
  (interactive "zPrefer coding system: ")
  (if (not (and coding-system (coding-system-p coding-system)))
      (error "Invalid coding system `%s'" coding-system))
  (if (memq (coding-system-type coding-system) '(raw-text undecided))
      (error "Can't prefer the coding system `%s'" coding-system))
  (let ((base (coding-system-base coding-system))
	(eol-type (coding-system-eol-type coding-system)))
    (set-coding-system-priority base)
    (and (called-interactively-p 'interactive)
	 (or (eq base coding-system)
	     (message "Highest priority is set to %s (base of %s)"
		      base coding-system)))
    ;; If they asked for specific EOL conversion, honor that.
    (if (memq eol-type '(0 1 2))
	(setq base
	      (coding-system-change-eol-conversion base eol-type)))
    (set-default-coding-systems base)
    (if (called-interactively-p 'interactive)
	(or (eq base (coding-system-type default-file-name-coding-system))
	    (message "The default value of `file-name-coding-system' was not changed because the specified coding system is not suitable for file names.")))))

(defvar sort-coding-systems-predicate nil
  "If non-nil, a predicate function to sort coding systems.

It is called with two coding systems, and should return t if the first
one is \"less\" than the second.

The function `sort-coding-systems' use it.")

(defun sort-coding-systems (codings)
  "Sort coding system list CODINGS by a priority of each coding system.
Return the sorted list.  CODINGS is modified by side effects.

If a coding system is most preferred, it has the highest priority.
Otherwise, coding systems that correspond to MIME charsets have
higher priorities.  Among them, a coding system included in the
`coding-system' key of the current language environment has higher
priority.  See also the documentation of `language-info-alist'.

If the variable `sort-coding-systems-predicate' (which see) is
non-nil, it is used to sort CODINGS instead."
  (if sort-coding-systems-predicate
      (sort codings sort-coding-systems-predicate)
    (let* ((from-priority (coding-system-priority-list))
	   (most-preferred (car from-priority))
	   (lang-preferred (get-language-info current-language-environment
					      'coding-system))
           (func (lambda (x)
                   (let ((base (coding-system-base x)))
                     ;; We calculate the priority number 0..255 by
                     ;; using the 8 bits PMMLCEII as this:
                     ;; P: 1 if most preferred.
                     ;; MM: greater than 0 if mime-charset.
                     ;; L: 1 if one of the current lang. env.'s codings.
                     ;; C: 1 if one of codings listed in the category list.
                     ;; E: 1 if not XXX-with-esc
                     ;; II: if iso-2022 based, 0..3, else 1.
                     (logior
                      (ash (if (eq base most-preferred) 1 0) 7)
                      (ash
                       (let ((mime (coding-system-get base :mime-charset)))
                         ;; Prefer coding systems corresponding to a
                         ;; MIME charset.
                         (if mime
                             ;; Lower utf-16 priority so that we
                             ;; normally prefer utf-8 to it, and put
                             ;; x-ctext below that.
                             (cond ((string-match-p "utf-16"
                                                    (symbol-name mime))
                                    2)
                                   ((string-match-p "^x-" (symbol-name mime))
                                    1)
                                   (t 3))
                           0))
                       5)
                      (ash (if (memq base lang-preferred) 1 0) 4)
                      (ash (if (memq base from-priority) 1 0) 3)
                      (ash (if (string-match-p "-with-esc\\'"
                                               (symbol-name base))
                               0 1) 2)
                      (if (eq (coding-system-type base) 'iso-2022)
                          (let ((category (coding-system-category base)))
                            ;; For ISO based coding systems, prefer
                            ;; one that doesn't use designation nor
                            ;; locking/single shifting.
                            (cond
                             ((or (eq category 'coding-category-iso-8-1)
                                  (eq category 'coding-category-iso-8-2))
                              2)
                             ((or (eq category 'coding-category-iso-7-tight)
                                  (eq category 'coding-category-iso-7))
                              1)
                             (t
                              0)))
                        1)
                      )))))
      (sort codings (lambda (x y)
                      (> (funcall func x) (funcall func y)))))))

(defun find-coding-systems-region (from to)
  "Return a list of proper coding systems to encode a text between FROM and TO.

If FROM is a string, find coding systems in that instead of the buffer.
All coding systems in the list can safely encode any multibyte characters
in the text.

If the text contains no multibyte characters, return a list of a single
element `undecided'."
  (let ((codings (find-coding-systems-region-internal from to)))
    (if (eq codings t)
	;; The text contains only ASCII characters.  Any coding
	;; systems are safe.
	'(undecided)
      ;; We need copy-sequence because sorting will alter the argument.
      (sort-coding-systems (copy-sequence codings)))))

(defun find-coding-systems-string (string)
  "Return a list of proper coding systems to encode STRING.
All coding systems in the list can safely encode any multibyte characters
in STRING.

If STRING contains no multibyte characters, return a list of a single
element `undecided'."
  (find-coding-systems-region string nil))

(defun find-coding-systems-for-charsets (charsets)
  "Return a list of proper coding systems to encode characters of CHARSETS.
CHARSETS is a list of character sets.

This only finds coding systems of type `charset', whose
`:charset-list' property includes all of CHARSETS (plus `ascii' for
ASCII-compatible coding systems).  It was used in older versions of
Emacs, but is unlikely to be what you really want now."
  ;; Deal with aliases.
  (setq charsets (mapcar (lambda (c)
			   (get-charset-property c :name))
			 charsets))
  (cond ((or (null charsets)
	     (and (= (length charsets) 1)
		  (eq 'ascii (car charsets))))
	 '(undecided))
	((or (memq 'eight-bit-control charsets)
	     (memq 'eight-bit-graphic charsets))
	 '(raw-text utf-8-emacs))
	(t
	 (let (codings)
	   (dolist (cs (coding-system-list t))
	     (let ((cs-charsets (and (eq (coding-system-type cs) 'charset)
				     (coding-system-charset-list cs)))
		   (charsets charsets))
	       (if (coding-system-get cs :ascii-compatible-p)
		   (cl-pushnew 'ascii cs-charsets))
	       (if (catch 'ok
		     (when cs-charsets
		       (while charsets
			 (unless (memq (pop charsets) cs-charsets)
			   (throw 'ok nil)))
		       t))
		   (push cs codings))))
	   (nreverse codings)))))

(defun find-multibyte-characters (from to &optional maxcount excludes)
  "Find multibyte characters in the region specified by FROM and TO.
If FROM is a string, find multibyte characters in the string.
The return value is an alist of the following format:
  ((CHARSET COUNT CHAR ...) ...)
where
  CHARSET is a character set,
  COUNT is a number of characters,
  CHARs are the characters found from the character set.
Optional 3rd arg MAXCOUNT limits how many CHARs are put in the above list.
Optional 4th arg EXCLUDES is a list of character sets to be ignored."
  (let ((chars nil)
	charset char)
    (if (stringp from)
	(if (multibyte-string-p from)
	    (let ((idx 0))
	      (while (setq idx (string-match-p "[^\000-\177]" from idx))
		(setq char (aref from idx)
		      charset (char-charset char))
		(unless (memq charset excludes)
		  (let ((slot (assq charset chars)))
		    (if slot
			(if (not (memq char (nthcdr 2 slot)))
			    (let ((count (nth 1 slot)))
			      (setcar (cdr slot) (1+ count))
			      (if (or (not maxcount) (< count maxcount))
				  (nconc slot (list char)))))
		      (setq chars (cons (list charset 1 char) chars)))))
		(setq idx (1+ idx)))))
      (if enable-multibyte-characters
	  (save-excursion
	    (goto-char from)
	    (while (re-search-forward "[^\000-\177]" to t)
	      (setq char (preceding-char)
		    charset (char-charset char))
	      (unless (memq charset excludes)
		(let ((slot (assq charset chars)))
		  (if slot
		      (if (not (member char (nthcdr 2 slot)))
			  (let ((count (nth 1 slot)))
			    (setcar (cdr slot) (1+ count))
			    (if (or (not maxcount) (< count maxcount))
				(nconc slot (list char)))))
		    (setq chars (cons (list charset 1 char) chars)))))))))
    (nreverse chars)))

(defun search-unencodable-char (coding-system)
  "Search forward from point for a character that is not encodable.
It asks which coding system to check.
If such a character is found, set point after that character.
Otherwise, don't move point.

When called from a program, the value is the position of the unencodable
character found, or nil if all characters are encodable."
  (interactive
   (list (let ((default (or buffer-file-coding-system 'us-ascii)))
	   (read-coding-system (format-prompt "Coding-system" default)
	                       default))))
  (let ((pos (unencodable-char-position (point) (point-max) coding-system)))
    (if pos
	(goto-char (1+ pos))
      (message "All following characters are encodable by %s" coding-system))
    pos))

(defvar last-coding-system-specified nil
  "Most recent coding system explicitly specified by the user when asked.
This variable is set whenever Emacs asks the user which coding system
to use in order to write a file.  If you set it to nil explicitly,
then call `write-region', then afterward this variable will be non-nil
only if the user was explicitly asked and specified a coding system.")

(defvar select-safe-coding-system-accept-default-p nil
  "If non-nil, a function to control the behavior of coding system selection.
The meaning is the same as the argument ACCEPT-DEFAULT-P of the
function `select-safe-coding-system' (which see).  This variable
overrides that argument.")

(defun sanitize-coding-system-list (codings)
  "Return a list of coding systems presumably more user-friendly than CODINGS."
  ;; Change each safe coding system to the corresponding
  ;; mime-charset name if it is also a coding system.  Such a name
  ;; is more friendly to users.
  (setq codings
        (mapcar (lambda (cs)
                  (let ((mime-charset (coding-system-get cs 'mime-charset)))
                    (if (and mime-charset (coding-system-p mime-charset)
                             (coding-system-equal cs mime-charset))
                        mime-charset cs)))
                codings))

  ;; Don't offer variations with locking shift, which you
  ;; basically never want.
  (let (l)
    (dolist (elt codings (setq codings (nreverse l)))
      (unless (or (eq 'coding-category-iso-7-else
		      (coding-system-category elt))
		  (eq 'coding-category-iso-8-else
		      (coding-system-category elt)))
	(push elt l))))

  ;; Remove raw-text, emacs-mule and no-conversion unless nothing
  ;; else is available.
  (or (delq 'raw-text
            (delq 'emacs-mule
                  (delq 'no-conversion (copy-sequence codings))))
      codings))

(defun select-safe-coding-system-interactively (from to codings unsafe
						&optional rejected default)
  "Select interactively a coding system for the region FROM ... TO.
FROM can be a string, as in `write-region'.
CODINGS is the list of base coding systems known to be safe for this region,
  typically obtained with `find-coding-systems-region'.
UNSAFE is a list of coding systems known to be unsafe for this region.
REJECTED is a list of coding systems which were safe but for some reason
  were not recommended in the particular context.
DEFAULT is the coding system to use by default in the query."
  ;; At first, if some defaults are unsafe, record at most 11
  ;; problematic characters and their positions for them by turning
  ;;	(CODING ...)
  ;; into
  ;;	((CODING (POS . CHAR) (POS . CHAR) ...) ...)
  (if unsafe
      (setq unsafe
	    (mapcar #'(lambda (coding)
			(cons coding
			      (if (stringp from)
				  (mapcar #'(lambda (pos)
					      (cons pos (aref from pos)))
					  (unencodable-char-position
					   0 (length from) coding
					   11 from))
				(mapcar #'(lambda (pos)
					    (cons pos (char-after pos)))
					(unencodable-char-position
					 from to coding 11)))))
		    unsafe)))

  (setq codings (sanitize-coding-system-list codings))

  (let ((window-configuration (current-window-configuration))
	(bufname (buffer-name))
	coding-system)
    (save-excursion
      ;; If some defaults are unsafe, make sure the offending
      ;; buffer is displayed.
      (when (and unsafe (not (stringp from)))
	(pop-to-buffer bufname)
	(goto-char (apply #'min (mapcar (lambda (x) (or (car (cadr x)) (point-max)))
				        unsafe))))
      ;; Then ask users to select one from CODINGS while showing
      ;; the reason why none of the defaults are not used.
      (with-output-to-temp-buffer "*Warning*"
	(with-current-buffer standard-output
	  (if (and (null rejected) (null unsafe))
	      (insert "No default coding systems to try for "
		      (if (stringp from)
			  (format "string \"%s\"." from)
			(format-message "buffer `%s'." bufname)))
	    (insert
	     "These default coding systems were tried to encode"
	     (if (stringp from)
		 (concat " \"" (if (> (length from) 10)
				   (concat (substring from 0 10) "...\"")
				 (concat from "\"")))
	       (format-message " text\nin the buffer `%s'" bufname))
	     ":\n")
	    (let ((pos (point))
		  (fill-prefix "  "))
	      (dolist (x (append rejected unsafe))
		(princ "  ") (princ x))
	      (insert "\n")
	      (fill-region-as-paragraph pos (point)))
	    (when rejected
	      (insert "These safely encode the text in the buffer,
but are not recommended for encoding text in this context,
e.g., for sending an email message.\n ")
	      (dolist (x rejected)
		(princ " ") (princ x))
	      (insert "\n"))
	    (when unsafe
	      (insert (if rejected "The other coding systems"
			"However, each of them")
		      (substitute-command-keys
		       " encountered characters it couldn't encode:\n"))
	      (dolist (coding unsafe)
		(insert (format "  %s cannot encode these:" (car coding)))
		(let ((i 0)
		      (func1
		       #'(lambda (bufname pos)
			   (when (buffer-live-p (get-buffer bufname))
			     (pop-to-buffer bufname)
			     (goto-char pos))))
		      (func2
		       #'(lambda (bufname pos coding)
			   (when (buffer-live-p (get-buffer bufname))
			     (pop-to-buffer bufname)
			     (if (< (point) pos)
				 (goto-char pos)
			       (forward-char 1)
			       (search-unencodable-char coding)
			       (forward-char -1))))))
		  (dolist (elt (cdr coding))
		    (insert " ")
		    (if (stringp from)
			(insert (if (< i 10) (cdr elt) "..."))
		      (if (< i 10)
			  (insert-text-button
			   (cdr elt)
			   :type 'help-xref
			   'face 'link
			   'help-echo
			   "mouse-2, RET: jump to this character"
			   'help-function func1
			   'help-args (list bufname (car elt)))
			(insert-text-button
			 "..."
			 :type 'help-xref
			 'face 'link
			 'help-echo
			 "mouse-2, RET: next unencodable character"
			 'help-function func2
			 'help-args (list bufname (car elt)
					  (car coding)))))
		    (setq i (1+ i))))
		(insert "\n"))
	      (insert (substitute-command-keys "\

Click on a character (or switch to this window by `\\[other-window]'\n\
and select the characters by RET) to jump to the place it appears,\n\
where `\\[universal-argument] \\[what-cursor-position]' will give information about it.\n"))))
	  (insert (substitute-command-keys "\nSelect \
one of the safe coding systems listed below,\n\
or cancel the writing with \\[keyboard-quit] and edit the buffer\n\
   to remove or modify the problematic characters,\n\
or specify any other coding system (and risk losing\n\
   the problematic characters).\n\n"))
	  (let ((pos (point))
		(fill-prefix "  "))
	    (dolist (x codings)
	      (princ "  ") (princ x))
	    (insert "\n")
	    (fill-region-as-paragraph pos (point)))))

      ;; Read a coding system.
      (setq coding-system
	    (read-coding-system (format-prompt "Select coding system" default)
	                        default))
      (setq last-coding-system-specified coding-system))

    (kill-buffer "*Warning*")
    (set-window-configuration window-configuration)
    coding-system))

(defun select-safe-coding-system (from to &optional default-coding-system
				       accept-default-p file)
  "Ask a user to select a safe coding system from candidates.
The candidates of coding systems which can safely encode a text
between FROM and TO are shown in a popup window.  Among them, the most
proper one is suggested as the default.

The list of `buffer-file-coding-system' of the current buffer, the
default `buffer-file-coding-system', and the most preferred coding
system (if it corresponds to a MIME charset) is treated as the
default coding system list.  Among them, the first one that safely
encodes the text is normally selected silently and returned without
any user interaction.  See also the command `prefer-coding-system'.

However, the user is queried if the chosen coding system is
inconsistent with what would be selected by `find-auto-coding' from
coding cookies &c. if the contents of the region were read from a
file.  (That could lead to data corruption in a file subsequently
re-visited and edited.)

Optional 3rd arg DEFAULT-CODING-SYSTEM specifies a coding system or a
list of coding systems to be prepended to the default coding system
list.  However, if DEFAULT-CODING-SYSTEM is a list and the first
element is t, the cdr part is used as the default coding system list,
i.e. current `buffer-file-coding-system', default `buffer-file-coding-system',
and the most preferred coding system are not used.

Optional 4th arg ACCEPT-DEFAULT-P, if non-nil, is a function to
determine the acceptability of the silently selected coding system.
It is called with that coding system, and should return nil if it
should not be silently selected and thus user interaction is required.

Optional 5th arg FILE is the file name to use for this purpose.
That is different from `buffer-file-name' when handling `write-region'
\(for example).

The variable `select-safe-coding-system-accept-default-p', if non-nil,
overrides ACCEPT-DEFAULT-P.

Kludgy feature: if FROM is a string, the string is the target text,
and TO is ignored."
  (if (not (listp default-coding-system))
      (setq default-coding-system (list default-coding-system)))

  (let ((no-other-defaults nil)
	auto-cs)
    (unless (or (stringp from) find-file-literally)
      ;; Find an auto-coding that is specified for the current
      ;; buffer and file from the region FROM and TO.
      (save-excursion
	(save-restriction
	  (widen)
	  (goto-char from)
	  (setq auto-cs (find-auto-coding (or file buffer-file-name "")
					  (- to from)))
	  (if auto-cs
	      (if (coding-system-p (car auto-cs))
		  (setq auto-cs (car auto-cs))
		(display-warning
		 'mule
		 (format-message "\
Invalid coding system `%s' is specified
for the current buffer/file by the %s.
It is highly recommended to fix it before writing to a file."
			 (car auto-cs)
			 (if (eq (cdr auto-cs) :coding) ":coding tag"
			   (format-message "variable `%s'" (cdr auto-cs))))
		 :warning)
		(or (yes-or-no-p "Really proceed with writing? ")
		    (error "Save aborted"))
		(setq auto-cs nil))))))

    (if (eq (car default-coding-system) t)
	(setq no-other-defaults t
	      default-coding-system (cdr default-coding-system)))

    ;; Change elements of the list to (coding . base-coding).
    (setq default-coding-system
          (mapcar (lambda (x) (cons x (coding-system-base x)))
		  default-coding-system))

    (if (and auto-cs (not no-other-defaults))
	;; If the file has a coding cookie, use it regardless of any
	;; other setting.
	(let ((base (coding-system-base auto-cs)))
	  (unless (memq base '(nil undecided))
            ;; For encoding, no-conversion-multibyte is the same as
            ;; no-conversion.
            (if (eq base 'no-conversion-multibyte)
                (setq auto-cs 'no-conversion
                      base 'no-conversion))
            (setq default-coding-system (list (cons auto-cs base)))
            (setq no-other-defaults t))))

    (unless no-other-defaults
      ;; If buffer-file-coding-system is not nil nor undecided, append it
      ;; to the defaults.
      (if buffer-file-coding-system
	  (let ((base (coding-system-base buffer-file-coding-system)))
	    (or (eq base 'undecided)
		(rassq base default-coding-system)
		(setq default-coding-system
		      (append default-coding-system
			      (list (cons buffer-file-coding-system base)))))))

      (unless (and buffer-file-coding-system-explicit
		   (cdr buffer-file-coding-system-explicit))
	;; If default buffer-file-coding-system is not nil nor undecided,
	;; append it to the defaults.
	(when (default-value 'buffer-file-coding-system)
          (let ((base (coding-system-base
                       (default-value 'buffer-file-coding-system))))
            (or (eq base 'undecided)
                (rassq base default-coding-system)
                (setq default-coding-system
                      (append default-coding-system
                              (list (cons (default-value
                                            'buffer-file-coding-system)
                                          base)))))))

	;; If the most preferred coding system has the property mime-charset,
	;; append it to the defaults.
	(let ((preferred (coding-system-priority-list t))
	      base)
	  (and (coding-system-p preferred)
	       (setq base (coding-system-base preferred))
	       (coding-system-get preferred :mime-charset)
	       (not (rassq base default-coding-system))
	       (setq default-coding-system
		     (append default-coding-system
			     (list (cons preferred base))))))))

    (if select-safe-coding-system-accept-default-p
	(setq accept-default-p select-safe-coding-system-accept-default-p))

    ;; Decide the eol-type from the top of the default codings,
    ;; current buffer-file-coding-system, or default buffer-file-coding-system.
    (if default-coding-system
	(let ((default-eol-type (coding-system-eol-type
				 (caar default-coding-system))))
	  (if (and (vectorp default-eol-type) buffer-file-coding-system)
	      (setq default-eol-type (coding-system-eol-type
				      buffer-file-coding-system)))
	  (if (and (vectorp default-eol-type)
                   (default-value 'buffer-file-coding-system))
	      (setq default-eol-type
                    (coding-system-eol-type
                     (default-value 'buffer-file-coding-system))))
	  (if (and default-eol-type (not (vectorp default-eol-type)))
	      (dolist (elt default-coding-system)
		(setcar elt (coding-system-change-eol-conversion
			     (car elt) default-eol-type))))))

    (let ((codings (find-coding-systems-region from to))
	  (coding-system nil)
	  (tick (if (not (stringp from)) (buffer-chars-modified-tick)))
	  safe rejected unsafe)
      (if (eq (car codings) 'undecided)
	  ;; Any coding system is ok.
	  (setq coding-system (caar default-coding-system))
	;; Reverse the list so that elements are accumulated in safe,
	;; rejected, and unsafe in the correct order.
	(setq default-coding-system (nreverse default-coding-system))

	;; Classify the defaults into safe, rejected, and unsafe.
	(dolist (elt default-coding-system)
	  (if (memq (cdr elt) codings)
	      ;; This is safe.  Is it acceptable?
	      (if (and (functionp accept-default-p)
		       (not (funcall accept-default-p (cdr elt))))
		  ;; No, not acceptable.
		  (push (car elt) rejected)
		;; Yes, acceptable.
		(push (car elt) safe))
	    ;; This is not safe.
	    (push (car elt) unsafe)))
	;; If there are safe ones, the first one is what we want.
	(if safe
	    (setq coding-system (car safe))))

      ;; If all the defaults failed, ask a user.
      (when (not coding-system)
        ;; If UTF-8 is in CODINGS, but is not its first member, make
        ;; it the first one, so it is offered as the default.
        (and (memq 'utf-8 codings) (not (eq 'utf-8 (car codings)))
             (setq codings (append '(utf-8) (delq 'utf-8 codings))))

	(setq coding-system (select-safe-coding-system-interactively
			     from to codings unsafe rejected (car codings))))

      ;; Check we're not inconsistent with what `coding:' spec &c would
      ;; give when file is re-read.
      ;; But don't do this if we explicitly ignored the cookie
      ;; by using `find-file-literally'.
      (when (and auto-cs
		 (not (and
		       coding-system
		       (memq (coding-system-type coding-system) '(0 5)))))
	;; Merge coding-system and auto-cs as far as possible.
	(if (not coding-system)
	    (setq coding-system auto-cs)
	  (if (not auto-cs)
	      (setq auto-cs coding-system)
	    (let ((eol-type-1 (coding-system-eol-type coding-system))
		  (eol-type-2 (coding-system-eol-type auto-cs)))
	    (if (eq (coding-system-base coding-system) 'undecided)
		(setq coding-system (coding-system-change-text-conversion
				     coding-system auto-cs))
	      (if (eq (coding-system-base auto-cs) 'undecided)
		  (setq auto-cs (coding-system-change-text-conversion
				 auto-cs coding-system))))
	    (if (vectorp eol-type-1)
		(or (vectorp eol-type-2)
		    (setq coding-system (coding-system-change-eol-conversion
					 coding-system eol-type-2)))
	      (if (vectorp eol-type-2)
		  (setq auto-cs (coding-system-change-eol-conversion
				 auto-cs eol-type-1)))))))

	(if (and auto-cs
		 ;; Don't barf if writing a compressed file, say.
		 ;; This check perhaps isn't ideal, but is probably
		 ;; the best thing to do.
		 (not (auto-coding-alist-lookup (or file buffer-file-name "")))
		 (not (coding-system-equal coding-system auto-cs))
                 ;; coding-system-equal barfs on 'charset'.
                 (or (equal (coding-system-type auto-cs) 'charset)
                     (equal (coding-system-type coding-system) 'charset)
                     (not (coding-system-equal (coding-system-type auto-cs)
                                               (coding-system-type
                                                coding-system)))))
	    (unless (yes-or-no-p
		     (format "Selected encoding %s disagrees with \
%s specified by file contents.  Really save (else edit coding cookies \
and try again)? " coding-system auto-cs))
	      (error "Save aborted"))))
      (when (and tick (/= tick (buffer-chars-modified-tick)))
	(error "Canceled because the buffer was modified"))
      (if (and (eq (coding-system-type coding-system) 'undecided)
	       (coding-system-get coding-system :prefer-utf-8)
	       (or (multibyte-string-p from)
		   (and (number-or-marker-p from)
			(< (- to from)
			   (- (position-bytes to) (position-bytes from))))))
	  (setq coding-system
		(coding-system-change-text-conversion coding-system 'utf-8)))
      coding-system)))

(setq select-safe-coding-system-function 'select-safe-coding-system)

(defun select-message-coding-system ()
  "Return a coding system to encode the outgoing message of the current buffer.
It at first tries the first coding system found in these variables
in this order:
  (1) local value of `buffer-file-coding-system'
  (2) value of `sendmail-coding-system'
  (3) value of `default-sendmail-coding-system'
  (4) default value of `buffer-file-coding-system'
If the found coding system can't encode the current buffer,
or none of them are bound to a coding system,
it asks the user to select a proper coding system."
  (let ((coding (or (and (local-variable-p 'buffer-file-coding-system)
			  buffer-file-coding-system)
		     sendmail-coding-system
		     default-sendmail-coding-system
		     (default-value 'buffer-file-coding-system))))
    (if (eq coding 'no-conversion)
	;; We should never use no-conversion for outgoing mail.
	(setq coding nil))
    (if (fboundp select-safe-coding-system-function)
	(funcall select-safe-coding-system-function
		 (point-min) (point-max) coding
                 (lambda (x) (coding-system-get x :mime-charset)))
      coding)))
\f
;;; Language support stuff.

(defvar language-info-alist nil
  "Alist of language environment definitions.
Each element looks like:
	(LANGUAGE-NAME . ((KEY . INFO) ...))
where LANGUAGE-NAME is a string, the name of the language environment,
KEY is a symbol denoting the kind of information, and
INFO is the data associated with KEY.
Meaningful values for KEY include

  documentation      value is documentation of what this language environment
			is meant for, and how to use it.
  charset	     value is a list of the character sets mainly used
			by this language environment.
  sample-text	     value is an expression which is evalled to generate
                        a line of text written using characters appropriate
                        for this language environment.
  setup-function     value is a function to call to switch to this
			language environment.
  exit-function      value is a function to call to leave this
		        language environment.
  coding-system      value is a list of coding systems that are good for
			saving text written in this language environment.
			This list serves as suggestions to the user;
			in effect, as a kind of documentation.
  coding-priority    value is a list of coding systems for this language
			environment, in order of decreasing priority.
			This is used to set up the coding system priority
			list when you switch to this language environment.
  nonascii-translation
		     value is a charset of dimension one to use for
			converting a unibyte character to multibyte
			and vice versa.
  input-method       value is a default input method for this language
			environment.
  features           value is a list of features requested in this
			language environment.
  ctext-non-standard-encodings
		     value is a list of non-standard encoding names used
			in extended segments of CTEXT.  See the variable
			`ctext-non-standard-encodings' for more detail.

The following key takes effect only when multibyte characters are
globally disabled, i.e. the default value of `enable-multibyte-characters'
is nil (which is an obsolete and deprecated use):

  unibyte-display    value is a coding system to encode characters for
			the terminal.  Characters in the range of 160 to
			255 display not as octal escapes, but as non-ASCII
			characters in this language environment.")

(defun get-language-info (lang-env key)
  "Return information listed under KEY for language environment LANG-ENV.
KEY is a symbol denoting the kind of information.
For a list of useful values for KEY and their meanings,
see `language-info-alist'."
  (if (symbolp lang-env)
      (setq lang-env (symbol-name lang-env)))
  (let ((lang-slot (assoc-string lang-env language-info-alist t)))
    (if lang-slot
	(cdr (assq key (cdr lang-slot))))))

(defun set-language-info (lang-env key info)
  "Modify part of the definition of language environment LANG-ENV.
Specifically, this stores the information INFO under KEY
in the definition of this language environment.
KEY is a symbol denoting the kind of information.
INFO is the value for that information.

For a list of useful values for KEY and their meanings,
see `language-info-alist'."
  (if (symbolp lang-env)
      (setq lang-env (symbol-name lang-env)))
  (set-language-info-internal lang-env key info)
  (if (equal lang-env current-language-environment)
      (cond ((eq key 'coding-priority)
	     (set-language-environment-coding-systems lang-env)
	     (set-language-environment-charset lang-env))
	    ((eq key 'input-method)
	     (set-language-environment-input-method lang-env))
	    ((eq key 'nonascii-translation)
	     (set-language-environment-nonascii-translation lang-env))
	    ((eq key 'charset)
	     (set-language-environment-charset lang-env)))))

(defun set-language-info-internal (lang-env key info)
  "Internal use only.
Arguments are the same as `set-language-info'."
  (let (lang-slot key-slot)
    (setq lang-slot (assoc lang-env language-info-alist))
    (if (null lang-slot)		; If no slot for the language, add it.
	(setq lang-slot (list lang-env)
	      language-info-alist (cons lang-slot language-info-alist)))
    (setq key-slot (assq key lang-slot))
    (if (null key-slot)			; If no slot for the key, add it.
	(progn
	  (setq key-slot (list key))
	  (setcdr lang-slot (cons key-slot (cdr lang-slot)))))
    (setcdr key-slot (purecopy info))
    ;; Update the custom-type of `current-language-environment'.
    (put 'current-language-environment 'custom-type
	 (cons 'choice (mapcar
			(lambda (lang)
			  (list 'const lang))
			(sort (mapcar 'car language-info-alist) 'string<))))))

(defun set-language-info-alist (lang-env alist &optional parents)
  "Store ALIST as the definition of language environment LANG-ENV.
ALIST is an alist of KEY and INFO values.  See the documentation of
`language-info-alist' for the meanings of KEY and INFO.

Optional arg PARENTS is a list of parent menu names; it specifies
where to put this language environment in the
Describe Language Environment and Set Language Environment menus.
For example, (\"European\") means to put this language environment
in the European submenu in each of those two menus."
  (cond ((symbolp lang-env)
	 (setq lang-env (symbol-name lang-env)))
	((stringp lang-env)
	 (setq lang-env (purecopy lang-env))))
  (let ((describe-map describe-language-environment-map)
	(setup-map setup-language-environment-map))
    (if parents
	(let ((l parents)
	      map parent-symbol parent prompt)
	  (while l
	    (if (symbolp (setq parent-symbol (car l)))
		(setq parent (symbol-name parent))
	      (setq parent parent-symbol parent-symbol (intern parent)))
	    (setq map (lookup-key describe-map (vector parent-symbol)))
	    ;; This prompt string is for define-prefix-command, so
	    ;; that the map it creates will be suitable for a menu.
	    (or map (setq prompt (format "%s Environment" parent)))
	    (if (not map)
		(progn
		  (setq map (intern (format "describe-%s-environment-map"
					    (downcase parent))))
		  (define-prefix-command map nil prompt)
		  (define-key-after describe-map (vector parent-symbol)
		    (cons parent map))))
	    (setq describe-map (symbol-value map))
	    (setq map (lookup-key setup-map (vector parent-symbol)))
	    (if (not map)
		(progn
		  (setq map (intern (format "setup-%s-environment-map"
					    (downcase parent))))
		  (define-prefix-command map nil prompt)
		  (define-key-after setup-map (vector parent-symbol)
		    (cons parent map))))
	    (setq setup-map (symbol-value map))
	    (setq l (cdr l)))))

    ;; Set up menu items for this language env.
    (let ((doc (assq 'documentation alist)))
      (when doc
	(define-key-after describe-map (vector (intern lang-env))
	  (cons lang-env 'describe-specified-language-support))))
    (define-key-after setup-map (vector (intern lang-env))
      (cons lang-env 'setup-specified-language-environment))

    (dolist (elt alist)
      (set-language-info-internal lang-env (car elt) (cdr elt)))

    (if (equal lang-env current-language-environment)
	(set-language-environment lang-env))))

(defun read-language-name (key prompt &optional default)
  "Read a language environment name which has information for KEY.
If KEY is nil, read any language environment.
Prompt with PROMPT.  DEFAULT is the default choice of language environment.
This returns a language environment name as a string."
  (let* ((completion-ignore-case t)
	 (name (completing-read prompt
				language-info-alist
				(and key
                                     (lambda (elm) (and (listp elm) (assq key elm))))
				t nil nil default)))
    (if (and (> (length name) 0)
	     (or (not key)
		 (get-language-info name key)))
	name)))
\f
;;; Multilingual input methods.
(defgroup leim nil
  "LEIM: Libraries of Emacs Input Methods."
  :group 'mule)

(defconst leim-list-file-name "leim-list.el"
  "Name of LEIM list file.
This file contains a list of libraries of Emacs input methods (LEIM)
in the format of Lisp expression for registering each input method.
Emacs loads this file at startup time.")

(defconst leim-list-header (format-message
";;; %s -- list of LEIM (Library of Emacs Input Method) -*-coding: utf-8;-*-
;;
;; This file is automatically generated.
;;
;; This file contains a list of LEIM (Library of Emacs Input Method)
;; methods in the same directory as this file.  Loading this file
;; registers all the input methods in Emacs.
;;
;; Each entry has the form:
;;   (register-input-method
;;    INPUT-METHOD LANGUAGE-NAME ACTIVATE-FUNC
;;    TITLE DESCRIPTION
;;    ARG ...)
;; See the function `register-input-method' for the meanings of the arguments.
;;
;; If this directory is included in `load-path', Emacs automatically
;; loads this file at startup time.

"
				 leim-list-file-name)
  "Header to be inserted in LEIM list file.")

(defconst leim-list-entry-regexp "^(register-input-method"
  "Regexp matching head of each entry in LEIM list file.
See also the variable `leim-list-header'.")

(defvar update-leim-list-functions
  '(quail-update-leim-list-file)
  "List of functions to call to update LEIM list file.
Each function is called with one arg, LEIM directory name.")

(defun update-leim-list-file (&rest dirs)
  "Update LEIM list file in directories DIRS."
  (dolist (function update-leim-list-functions)
    (apply function dirs)))

(defvar current-input-method nil
  "The current input method for multilingual text.
If nil, that means no input method is activated now.")
(make-variable-buffer-local 'current-input-method)
(put 'current-input-method 'permanent-local t)

(defvar current-input-method-title nil
  "Title string of the current input method shown in mode line.")
(make-variable-buffer-local 'current-input-method-title)
(put 'current-input-method-title 'permanent-local t)

(define-widget 'mule-input-method-string 'string
  "String widget with completion for input method."
  :completions
  (lambda (string pred action)
    (let ((completion-ignore-case t))
      (complete-with-action action input-method-alist string pred)))
  :prompt-history 'input-method-history)

(defcustom default-input-method nil
  "Default input method for multilingual text (a string).
This is the input method activated automatically by the command
`toggle-input-method' (\\[toggle-input-method])."
  :link  '(custom-manual "(emacs)Input Methods")
  :group 'mule
  :type '(choice (const nil)
                 mule-input-method-string)
  :set-after '(current-language-environment))

(defcustom default-transient-input-method nil
  "Default transient input method.
This is the input method activated by the command
`activate-transient-input-method' (\\[activate-transient-input-method])."
  :link  '(custom-manual "(emacs)Input Methods")
  :group 'mule
  :type '(choice (const nil)
                 mule-input-method-string)
  :set-after '(current-language-environment)
  :version "28.1")

(defvar current-transient-input-method nil
  "Input method temporarily enabled by `activate-transient-input-method'.
If nil, that means no transient input method is active now.")
(make-variable-buffer-local 'current-transient-input-method)
(put 'current-transient-input-method 'permanent-local t)

(defvar previous-transient-input-method nil
  "The input method that was active before enabling the transient input method.
If nil, that means no previous input method was active.")
(make-variable-buffer-local 'previous-transient-input-method)
(put 'previous-transient-input-method 'permanent-local t)

(put 'input-method-function 'permanent-local t)

(defvar input-method-history nil
  "History list of input methods read from the minibuffer.

Maximum length of the history list is determined by the value
of `history-length', which see.")
(make-variable-buffer-local 'input-method-history)
(put 'input-method-history 'permanent-local t)

(define-obsolete-variable-alias
  'inactivate-current-input-method-function
  'deactivate-current-input-method-function "24.3")
(defvar deactivate-current-input-method-function nil
  "Function to call for deactivating the current input method.
Every input method should set this to an appropriate value when activated.
This function is called with no argument.

This function should never change the value of `current-input-method'.
It is set to nil by the function `deactivate-input-method'.")
(make-variable-buffer-local 'deactivate-current-input-method-function)
(put 'deactivate-current-input-method-function 'permanent-local t)

(defvar describe-current-input-method-function nil
  "Function to call for describing the current input method.
This function is called with no argument.")
(make-variable-buffer-local 'describe-current-input-method-function)
(put 'describe-current-input-method-function 'permanent-local t)

(defvar input-method-alist nil
  "Alist of input method names vs how to use them.
Each element has the form:
   (INPUT-METHOD LANGUAGE-ENV ACTIVATE-FUNC TITLE DESCRIPTION ARGS...)
See the function `register-input-method' for the meanings of the elements.")
;;;###autoload
(put 'input-method-alist 'risky-local-variable t)

(defun register-input-method (input-method lang-env &rest args)
  "Register INPUT-METHOD as an input method for language environment LANG-ENV.

INPUT-METHOD and LANG-ENV are symbols or strings.
ACTIVATE-FUNC is a function to call to activate this method.
TITLE is a string to show in the mode line when this method is active.
DESCRIPTION is a string describing this method and what it is good for.
The ARGS, if any, are passed as arguments to ACTIVATE-FUNC.
All told, the arguments to ACTIVATE-FUNC are INPUT-METHOD and the ARGS.

This function is mainly used in the file \"leim-list.el\" which is
created at Emacs build time, registering all Quail input methods
contained in the Emacs distribution.

In case you want to register a new Quail input method by yourself, be
careful to use the same input method title as given in the third
parameter of `quail-define-package'.  (If the values are different, the
string specified in this function takes precedence.)

The commands `describe-input-method' and `list-input-methods' need
these duplicated values to show some information about input methods
without loading the relevant Quail packages.
\n(fn INPUT-METHOD LANG-ENV ACTIVATE-FUNC TITLE DESCRIPTION &rest ARGS)"
  (setq lang-env (if (symbolp lang-env)
                     (symbol-name lang-env)
                   (purecopy lang-env)))
  (setq input-method (if (symbolp input-method)
                         (symbol-name input-method)
                       (purecopy input-method)))
  (setq args (mapcar #'purecopy args))
  (let ((info (cons lang-env args))
	(slot (assoc input-method input-method-alist)))
    (if slot
	(setcdr slot info)
      (setq slot (cons input-method info))
      (setq input-method-alist (cons slot input-method-alist)))))

(defun read-input-method-name (prompt &optional default inhibit-null)
  "Read a name of input method from a minibuffer prompting with PROMPT.
If DEFAULT is non-nil, use that as the default,
and substitute it into PROMPT at the first `%s'.
If INHIBIT-NULL is non-nil, null input signals an error.

The return value is a string."
  (if default
      (setq prompt (format prompt default)))
  (let* ((completion-ignore-case t)
	 ;; As it is quite normal to change input method in the
	 ;; minibuffer, we must enable it even if
	 ;; enable-recursive-minibuffers is currently nil.
	 (enable-recursive-minibuffers t)
	 ;; This binding is necessary because input-method-history is
	 ;; buffer local.
	 (input-method (completing-read prompt input-method-alist
					nil t nil 'input-method-history
					(if (and default (symbolp default))
                                            (symbol-name default)
                                          default))))
    (if (and input-method (symbolp input-method))
	(setq input-method (symbol-name input-method)))
    (if (> (length input-method) 0)
	input-method
      (if inhibit-null
	  (error "No valid input method is specified")))))

(defun activate-input-method (input-method)
  "Switch to input method INPUT-METHOD for the current buffer.
If some other input method is already active, turn it off first.
If INPUT-METHOD is nil, deactivate any current input method."
  (if (and input-method (symbolp input-method))
      (setq input-method (symbol-name input-method)))
  (if (and current-input-method
	   (not (string= current-input-method input-method)))
      (deactivate-input-method))
  (unless (or current-input-method (null input-method))
    (let ((slot (assoc input-method input-method-alist)))
      (if (null slot)
	  (error "Can't activate input method `%s'" input-method))
      (setq current-input-method-title nil)
      (let ((func (nth 2 slot)))
	(if (functionp func)
	    (apply (nth 2 slot) input-method (nthcdr 5 slot))
	  (if (and (consp func) (symbolp (car func)) (symbolp (cdr func)))
	      (progn
		(require (cdr func))
		(apply (car func) input-method (nthcdr 5 slot)))
	    (error "Can't activate input method `%s'" input-method))))
      (setq current-input-method input-method)
      (or (stringp current-input-method-title)
	  (setq current-input-method-title (nth 3 slot)))
      (unwind-protect
	  (run-hooks 'input-method-activate-hook)
	(force-mode-line-update)))))

(defun deactivate-input-method ()
  "Turn off the current input method."
  (when current-input-method
    (unless current-transient-input-method
      (add-to-history 'input-method-history current-input-method))
    (unwind-protect
	(progn
	  (setq input-method-function nil
		current-input-method-title nil)
	  (funcall deactivate-current-input-method-function))
      (unwind-protect
	  (run-hooks 'input-method-deactivate-hook)
	(setq current-input-method nil)
	(force-mode-line-update)))))

(define-obsolete-function-alias
  'inactivate-input-method
  'deactivate-input-method "24.3")

(defun set-input-method (input-method &optional interactive)
  "Select and activate input method INPUT-METHOD for the current buffer.
This also sets the default input method to the one you specify.
If INPUT-METHOD is nil, this function turns off the input method, and
also causes you to be prompted for a name of an input method the next
time you invoke \\[toggle-input-method].
When called interactively, the optional arg INTERACTIVE is non-nil,
which marks the variable `default-input-method' as set for Custom buffers.

To deactivate the input method interactively, use \\[toggle-input-method].
To deactivate it programmatically, use `deactivate-input-method'."
  (interactive
   (let* ((default (or (car input-method-history) default-input-method)))
     (list (read-input-method-name
	    (if default "Select input method (default %s): " "Select input method: ")
	    default t)
	   t)))
  (activate-input-method input-method)
  (setq default-input-method input-method)
  (when interactive
    (customize-mark-as-set 'default-input-method))
  default-input-method)

(defvar toggle-input-method-active nil
  "Non-nil inside `toggle-input-method'.")

(defun toggle-input-method (&optional arg interactive)
  "Enable or disable multilingual text input method for the current buffer.
Only one input method can be enabled at any time in a given buffer.

The normal action is to enable an input method if none was enabled,
and disable the current one otherwise.  Which input method to enable
can be determined in various ways--either the one most recently used,
or the one specified by `default-input-method', or as a last resort
by reading the name of an input method in the minibuffer.

With a prefix argument ARG, read an input method name with the minibuffer
and enable that one.  The default is the most recent input method specified
\(not including the currently active input method, if any).

When called interactively, the optional argument INTERACTIVE is non-nil,
which marks the variable `default-input-method' as set for Custom buffers."

  (interactive "P\np")
  (if toggle-input-method-active
      (error "Recursive use of `toggle-input-method'"))
  (if (and current-input-method (not arg))
      (if current-transient-input-method
          (deactivate-transient-input-method)
        (deactivate-input-method))
    (let ((toggle-input-method-active t)
	  (default (or (car input-method-history) default-input-method)))
      (if (and arg default (equal current-input-method default)
	       (> (length input-method-history) 1))
	  (setq default (nth 1 input-method-history)))
      (activate-input-method
       (if (or arg (not default))
	   (progn
	     (read-input-method-name
	      (if default "Input method (default %s): " "Input method: " )
	      default t))
	 default))
      (unless default-input-method
	(prog1
	    (setq default-input-method current-input-method)
	  (when interactive
	    (customize-mark-as-set 'default-input-method)))))))

(defun activate-transient-input-method (&optional arg interactive)
  "Select and enable a transient input method for the current buffer.
If `default-transient-input-method' was not yet defined, prompt for it."
  (interactive "P\np")
  (when (or arg (not default-transient-input-method))
    (let* ((default (or (car input-method-history) default-input-method))
           (input-method
            (read-input-method-name
             (format-prompt "Transient input method" default)
             default t)))
      (setq default-transient-input-method input-method)
      (when interactive
        (customize-mark-as-set 'default-transient-input-method))))
  (let* ((clearfun (make-symbol "clear-transient-input-method"))
         (exitfun
          (lambda ()
            (deactivate-transient-input-method)
            (remove-hook 'input-method-after-insert-chunk-hook clearfun))))
    (fset clearfun (lambda () (funcall exitfun)))
    (add-hook 'input-method-after-insert-chunk-hook clearfun)
    (setq previous-transient-input-method current-input-method)
    (when previous-transient-input-method
      (deactivate-input-method))
    (activate-input-method default-transient-input-method)
    (setq current-transient-input-method default-transient-input-method)
    exitfun))

(defun deactivate-transient-input-method ()
  "Disable currently active transient input method for the current buffer."
  (when current-transient-input-method
    (deactivate-input-method)
    (when previous-transient-input-method
      (activate-input-method previous-transient-input-method)
      (setq previous-transient-input-method nil))
    (setq current-transient-input-method nil)))

(autoload 'help-buffer "help-mode")

(defun describe-input-method (input-method)
  "Describe input method INPUT-METHOD."
  (interactive
   (list (read-input-method-name
	  "Describe input method (default current choice): ")))
  (if (and input-method (symbolp input-method))
      (setq input-method (symbol-name input-method)))
  (help-setup-xref (list #'describe-input-method
			 (or input-method current-input-method))
		   (called-interactively-p 'interactive))

  (if (null input-method)
      (describe-current-input-method)
    (let ((current current-input-method))
      (condition-case nil
	  (progn
	    (save-excursion
	      (activate-input-method input-method)
	      (describe-current-input-method))
	    (activate-input-method current))
	(error
	 (activate-input-method current)
	 (help-setup-xref (list #'describe-input-method input-method)
			  (called-interactively-p 'interactive))
	 (with-output-to-temp-buffer (help-buffer)
	   (let ((elt (assoc input-method input-method-alist)))
	     (princ (format-message
		     "Input method: %s (`%s' in mode line) for %s\n  %s\n"
		     input-method (nth 3 elt) (nth 1 elt) (nth 4 elt))))))))))

(defun describe-current-input-method ()
  "Describe the input method currently in use.
This is a subroutine for `describe-input-method'."
  (if current-input-method
      (if (and (symbolp describe-current-input-method-function)
	       (fboundp describe-current-input-method-function))
	  (funcall describe-current-input-method-function)
	(message "No way to describe the current input method `%s'"
		 current-input-method)
	(ding))
    (error "No input method is activated now")))

(defun read-multilingual-string (prompt &optional initial-input input-method)
  "Read a multilingual string from minibuffer, prompting with string PROMPT.
The input method selected last time is activated in minibuffer.
If optional second argument INITIAL-INPUT is non-nil, insert it in the
minibuffer initially.
Optional 3rd argument INPUT-METHOD specifies the input method to be activated
instead of the one selected last time.  It is a symbol or a string."
  (setq input-method
	(or input-method
	    current-input-method
	    default-input-method
	    (read-input-method-name "Input method: " nil t)))
  (if (and input-method (symbolp input-method))
      (setq input-method (symbol-name input-method)))
  (let ((prev-input-method current-input-method))
    (unwind-protect
	(progn
	  (activate-input-method input-method)
	  (read-string prompt initial-input nil nil t))
      (activate-input-method prev-input-method))))

;; Variables to control behavior of input methods.  All input methods
;; should react to these variables.

(defcustom input-method-verbose-flag 'default
  "A flag to control extra guidance given by input methods.
The value should be nil, t, `complex-only', or `default'.

The extra guidance is done by showing list of available keys in echo
area.  When you use the input method in the minibuffer, the guidance
is shown at the bottom short window (split from the existing window).

If the value is t, extra guidance is always given, if the value is
nil, extra guidance is always suppressed.

If the value is `complex-only', only complex input methods such as
`chinese-py' and `japanese' give extra guidance.

If the value is `default', complex input methods always give extra
guidance, but simple input methods give it only when you are not in
the minibuffer.

See also the variable `input-method-highlight-flag'."
  :type '(choice (const :tag "Always" t) (const :tag "Never" nil)
		 (const complex-only) (const default))
  :group 'mule)

(defcustom input-method-highlight-flag t
  "If this flag is non-nil, input methods highlight partially-entered text.
For instance, while you are in the middle of a Quail input method sequence,
the text inserted so far is temporarily underlined.
The underlining goes away when you finish or abort the input method sequence.
See also the variable `input-method-verbose-flag'."
  :type 'boolean
  :group 'mule)

(defcustom input-method-activate-hook nil
  "Normal hook run just after an input method is activated.

The variable `current-input-method' keeps the input method name
just activated."
  :type 'hook
  :group 'mule)

(define-obsolete-variable-alias
  'input-method-inactivate-hook
  'input-method-deactivate-hook "24.3")

(defcustom input-method-deactivate-hook nil
  "Normal hook run just after an input method is deactivated.

The variable `current-input-method' still keeps the input method name
just deactivated."
  :type 'hook
  :group 'mule
  :version "24.3")

(defcustom input-method-after-insert-chunk-hook nil
  "Normal hook run just after an input method insert some chunk of text."
  :type 'hook
  :group 'mule)

(defvar input-method-exit-on-first-char nil
  "This flag controls when an input method returns.
Usually, the input method does not return while there's a possibility
that it may find a different translation if a user types another key.
But, if this flag is non-nil, the input method returns as soon as the
current key sequence gets long enough to have some valid translation.")

(defcustom input-method-use-echo-area nil
  "This flag controls how an input method shows an intermediate key sequence.
Usually, the input method inserts the intermediate key sequence,
or candidate translations corresponding to the sequence,
at point in the current buffer.
But, if this flag is non-nil, it displays them in echo area instead."
  :type 'boolean
  :group 'mule)

(defvar input-method-exit-on-invalid-key nil
  "This flag controls the behavior of an input method on invalid key input.
Usually, when a user types a key which doesn't start any character
handled by the input method, the key is handled by turning off the
input method temporarily.  After that key, the input method is re-enabled.
But, if this flag is non-nil, the input method is never back on.")

\f
(defcustom set-language-environment-hook nil
  "Normal hook run after some language environment is set.

When you set some hook function here, that effect usually should not
be inherited to another language environment.  So, you had better set
another function in `exit-language-environment-hook' (which see) to
cancel the effect."
  :type 'hook
  :group 'mule)

(defcustom exit-language-environment-hook nil
  "Normal hook run after exiting from some language environment.
When this hook is run, the variable `current-language-environment'
is still bound to the language environment being exited.

This hook is mainly used for canceling the effect of
`set-language-environment-hook' (which see)."
  :type 'hook
  :group 'mule)

(put 'setup-specified-language-environment 'apropos-inhibit t)

(defun setup-specified-language-environment ()
  "Switch to a specified language environment."
  (interactive)
  (let (language-name)
    (if (and (symbolp last-command-event)
	     (or (not (eq last-command-event 'Default))
		 (setq last-command-event 'English))
	     (setq language-name (symbol-name last-command-event)))
	(prog1
	    (set-language-environment language-name)
	  (customize-mark-as-set 'current-language-environment))
      (error "Bogus calling sequence"))))

(defcustom current-language-environment "English"
  "The last language environment specified with `set-language-environment'.
This variable should be set only with \\[customize], which is equivalent
to using the function `set-language-environment'."
  :link '(custom-manual "(emacs)Language Environments")
  :set (lambda (_symbol value) (set-language-environment value))
  :get (lambda (_x)
	 (or (car-safe (assoc-string
			(if (symbolp current-language-environment)
			    (symbol-name current-language-environment)
			  current-language-environment)
			language-info-alist t))
	     "English"))
  ;; custom type will be updated with `set-language-info'.
  :type (if language-info-alist
	    (cons 'choice (mapcar
			   (lambda (lang)
			     (list 'const lang))
			   (sort (mapcar 'car language-info-alist) 'string<)))
	  'string)
  :initialize 'custom-initialize-default
  :group 'mule)

(defun reset-language-environment ()
  "Reset multilingual environment of Emacs to the default status.

The default status is as follows:

  The default value of `buffer-file-coding-system' is nil.
  The default coding system for process I/O is nil.
  The default value for the command `set-terminal-coding-system' is nil.
  The default value for the command `set-keyboard-coding-system' is nil.

  The order of priorities of coding systems are as follows:
	utf-8
	iso-2022-7bit
	iso-latin-1
	iso-2022-7bit-lock
	iso-2022-8bit-ss2
	emacs-mule
	raw-text"
  (interactive)
  ;; This function formerly set default-enable-multibyte-characters to t,
  ;; but that is incorrect.  It should not alter the unibyte/multibyte choice.

  (set-coding-system-priority
   'utf-8
   'iso-2022-7bit
   'iso-latin-1
   'iso-2022-7bit-lock
   'iso-2022-8bit-ss2
   'emacs-mule
   'raw-text)

  (set-default-coding-systems nil)
  (setq default-sendmail-coding-system 'utf-8)
  (setq default-file-name-coding-system (if (memq system-type
                                                  '(window-nt ms-dos))
                                            'iso-latin-1-unix
                                          'utf-8-unix))
  ;; Preserve eol-type from existing default-process-coding-systems.
  ;; On non-unix-like systems in particular, these may have been set
  ;; carefully by the user, or by the startup code, to deal with the
  ;; users shell appropriately, so should not be altered by changing
  ;; language environment.
  (let ((output-coding
	 ;; When bootstrapping, coding-systems are not defined yet, so
	 ;; we need to catch the error from check-coding-system.
	 (condition-case nil
	     (coding-system-change-text-conversion
	      (car default-process-coding-system) 'undecided)
	   (coding-system-error 'undecided)))
	(input-coding
	 (condition-case nil
	     (coding-system-change-text-conversion
	      (cdr default-process-coding-system)
	      (if (memq system-type '(window-nt ms-dos)) 'iso-latin-1 'utf-8))
	   (coding-system-error
	    (if (memq system-type '(window-nt ms-dos)) 'iso-latin-1 'utf-8)))))
    (setq default-process-coding-system
	  (cons output-coding input-coding)))

  ;; Put the highest priority to the charset iso-8859-1 to prefer the
  ;; registry iso8859-1 over iso8859-2 in font selection.  It also
  ;; makes unibyte-display-via-language-environment to use iso-8859-1
  ;; as the unibyte charset.
  (set-charset-priority 'iso-8859-1)

  ;; Don't alter the terminal and keyboard coding systems here.
  ;; The terminal still supports the same coding system
  ;; that it supported a minute ago.
  ;; (set-terminal-coding-system-internal nil)
  ;; (set-keyboard-coding-system-internal nil)

  ;; Back in Emacs-20, it was necessary to provide some fallback implicit
  ;; conversion, because almost no packages handled coding-system issues.
  ;; Nowadays it'd just paper over bugs.
  ;; (set-unibyte-charset 'iso-8859-1)
  )

(reset-language-environment)

(defun set-display-table-and-terminal-coding-system (language-name &optional coding-system display)
  "Set up the display table and terminal coding system for LANGUAGE-NAME."
  (let ((coding (get-language-info language-name 'unibyte-display)))
    (if (and coding
	     (or (not coding-system)
		 (coding-system-equal coding coding-system)))
	(standard-display-european-internal)
      ;; The following 2 lines undo the 8-bit display that we set up
      ;; in standard-display-european-internal, which see.  This is in
      ;; case the user has used standard-display-european earlier in
      ;; this session.
      (when standard-display-table
	(dotimes (i 128)
	  (aset standard-display-table (+ i 128) nil))))
    (set-terminal-coding-system (or coding-system coding) display)))

(defun set-language-environment (language-name)
  "Set up multilingual environment for using LANGUAGE-NAME.
This sets the coding system priority and the default input method
and sometimes other things.  LANGUAGE-NAME should be a string
which is the name of a language environment.  For example, \"Latin-1\"
specifies the character set for the major languages of Western Europe.

If there is a prior value for `current-language-environment', this
runs the hook `exit-language-environment-hook'.  After setting up
the new language environment, it runs `set-language-environment-hook'."
  (interactive (list (read-language-name
		      nil
		      "Set language environment (default English): ")))
  (if language-name
      (if (symbolp language-name)
	  (setq language-name (symbol-name language-name)))
    (setq language-name "English"))
  (let ((slot (assoc-string language-name language-info-alist t)))
    (unless slot
      (error "Language environment not defined: %S" language-name))
    (setq language-name (car slot)))
  (if current-language-environment
      (let ((func (get-language-info current-language-environment
				     'exit-function)))
	(run-hooks 'exit-language-environment-hook)
	(if (functionp func) (funcall func))))

  (reset-language-environment)
  ;; The features might set up coding systems.
  (let ((required-features (get-language-info language-name 'features)))
    (while required-features
      (require (car required-features))
      (setq required-features (cdr required-features))))

  (setq current-language-environment language-name)

  (set-language-environment-coding-systems language-name)
  (set-language-environment-input-method language-name)
  (set-language-environment-nonascii-translation language-name)
  (set-language-environment-charset language-name)

  (let ((func (get-language-info language-name 'setup-function)))
    (if (functionp func)
	(funcall func)))

  (setq current-iso639-language
	(or (get-language-info language-name 'iso639-language)
	    current-iso639-language))

  (run-hooks 'set-language-environment-hook)
  (force-mode-line-update t))

(define-widget 'charset 'symbol
  "An Emacs charset."
  :tag "Charset"
  :completions
  (lambda (string pred action)
    (let ((completion-ignore-case t))
      (completion-table-with-predicate
       obarray #'charsetp 'strict string pred action)))
  :value 'ascii
  :validate (lambda (widget)
	      (unless (charsetp (widget-value widget))
		(widget-put widget :error (format "Invalid charset: %S"
						  (widget-value widget)))
		widget))
  :prompt-history 'charset-history)

(defcustom language-info-custom-alist nil
  "Customizations of language environment parameters.
Value is an alist with elements like those of `language-info-alist'.
These are used to set values in `language-info-alist' which replace
the defaults.  A typical use is replacing the default input method for
the environment.  Use \\[describe-language-environment] to find the environment's settings.

This option is intended for use at startup.  Removing items doesn't
remove them from the language info until you next restart Emacs.

Setting this variable directly does not take effect.
See `set-language-info-alist' for use in programs."
  :group 'mule
  :version "23.1"
  :set (lambda (s v)
	 (custom-set-default s v)
	 ;; Can't do this before language environments are set up.
	 (when v
	   ;; modify language-info-alist
	   (dolist (elt v)
	     (set-language-info-alist (car elt) (cdr elt)))
	   ;; re-set the environment in case its parameters changed
	   (set-language-environment current-language-environment)))
  :type '(alist
	  :key-type (string :tag "Language environment"
			    :completions
                            (lambda (string pred action)
                              (let ((completion-ignore-case t))
                                (complete-with-action
                                 action language-info-alist string pred))))
	  :value-type
	  (alist :key-type symbol
		 :options ((documentation string)
			   (charset (repeat charset))
			   (sample-text string)
			   (setup-function function)
			   (exit-function function)
			   (coding-system (repeat coding-system))
			   (coding-priority (repeat coding-system))
			   (nonascii-translation charset)
			   (input-method mule-input-method-string)
			   (features (repeat symbol))
			   (unibyte-display coding-system)))))

(declare-function x-server-vendor "xfns.c" (&optional terminal))
(declare-function x-server-version "xfns.c" (&optional terminal))

(defun standard-display-european-internal ()
  ;; Actually set up direct output of non-ASCII characters.
  (standard-display-8bit (if (eq window-system 'pc) 128 160) 255)
  ;; Most X fonts used to do the wrong thing for latin-1 code 160.
  (unless (and (eq window-system 'x)
	       ;; XFree86 4 has fixed the fonts.
	       (string= "The XFree86 Project, Inc" (x-server-vendor))
	       (> (aref (number-to-string (nth 2 (x-server-version))) 0)
		  ?3))
    ;; Make non-line-break space display as a plain space.
    (aset standard-display-table (unibyte-char-to-multibyte 160) [32]))
  ;; Most Windows programs send out apostrophes as \222.  Most X fonts
  ;; don't contain a character at that position.  Map it to the ASCII
  ;; apostrophe.  [This is actually RIGHT SINGLE QUOTATION MARK,
  ;; U+2019, normally from the windows-1252 character set.  XFree 4
  ;; fonts probably have the appropriate glyph at this position,
  ;; so they could use standard-display-8bit.  It's better to use a
  ;; proper windows-1252 coding system.  --fx]
  (aset standard-display-table (unibyte-char-to-multibyte 146) [39]))

(defun set-language-environment-coding-systems (language-name)
  "Do various coding system setups for language environment LANGUAGE-NAME."
  (let* ((priority (get-language-info language-name 'coding-priority))
	 (default-coding (car priority))
	 ;; If the default buffer-file-coding-system is nil, don't use
	 ;; coding-system-eol-type, because it treats nil as
	 ;; `no-conversion'.  The default buffer-file-coding-system is set
	 ;; to nil by reset-language-environment, and in that case we
	 ;; want to have here the native EOL type for each platform.
	 ;; FIXME: there should be a common code that runs both on
	 ;; startup and here to set the default EOL type correctly.
	 ;; Right now, DOS/Windows platforms set this on dos-w32.el,
	 ;; which works only as long as the order of loading files at
	 ;; dump time and calling functions at startup is not modified
	 ;; significantly, i.e. as long as this function is called
	 ;; _after_ the default buffer-file-coding-system was set by
	 ;; dos-w32.el.
	 (eol-type
          (coding-system-eol-type
           (or (default-value 'buffer-file-coding-system)
               (if (memq system-type '(windows-nt ms-dos)) 'dos 'unix)))))
    (when priority
      (set-default-coding-systems
       (if (memq eol-type '(0 1 2 unix dos mac))
	   (coding-system-change-eol-conversion default-coding eol-type)
	 default-coding))
      (setq default-sendmail-coding-system default-coding)
      (apply 'set-coding-system-priority priority))))

(defun set-language-environment-input-method (language-name)
  "Do various input method setups for language environment LANGUAGE-NAME."
  (let ((input-method (get-language-info language-name 'input-method)))
    (when input-method
      (setq default-input-method input-method)
      (when input-method-history
        (add-to-history 'input-method-history input-method)))))

(defun set-language-environment-nonascii-translation (language-name)
  "Do unibyte/multibyte translation setup for language environment LANGUAGE-NAME."
  ;; Note: For DOS, we assumed that the charset cpXXX is already
  ;; defined.
  (let ((nonascii (get-language-info language-name 'nonascii-translation)))
    (if (eq window-system 'pc)
	(setq nonascii (intern (format "cp%d" dos-codepage))))
    (or (and (charsetp nonascii)
	     (get-charset-property nonascii :ascii-compatible-p))
	(setq nonascii 'iso-8859-1))
    ;; Back in Emacs-20, it was necessary to provide some fallback implicit
    ;; conversion, because almost no packages handled coding-system issues.
    ;; Nowadays it'd just paper over bugs.
    ;; (set-unibyte-charset nonascii)
    ))

(defun set-language-environment-charset (language-name)
  "Do various charset setups for language environment LANGUAGE-NAME."
  ;; Put higher priorities to such charsets that are supported by the
  ;; coding systems of higher priorities in this environment.
  (let ((charsets (get-language-info language-name 'charset)))
    (dolist (coding (get-language-info language-name 'coding-priority))
      (let ((list (coding-system-charset-list coding)))
	(if (consp list)
	    (setq charsets (append charsets list)))))
    (if charsets
	(apply 'set-charset-priority charsets))))

(defun set-language-environment-unibyte (language-name)
  "Do various unibyte-mode setups for language environment LANGUAGE-NAME."
  (set-display-table-and-terminal-coding-system language-name))

(put 'describe-specified-language-support 'apropos-inhibit t)

;; Print language-specific information such as input methods,
;; charsets, and coding systems.  This function is intended to be
;; called from the menu:
;;   [menu-bar mule describe-language-environment LANGUAGE]
;; and should not run it by `M-x describe-current-input-method-function'.
(defun describe-specified-language-support ()
  "Describe how Emacs supports the specified language environment."
  (interactive)
  (let (language-name)
    (if (not (and (symbolp last-command-event)
		  (or (not (eq last-command-event 'Default))
		      (setq last-command-event 'English))
		  (setq language-name (symbol-name last-command-event))))
	(error "This command should only be called from the menu bar"))
    (describe-language-environment language-name)))

(defun describe-language-environment (language-name)
  "Describe how Emacs supports language environment LANGUAGE-NAME."
  (interactive
   (list (read-language-name
	  'documentation
	  "Describe language environment (default current choice): ")))
  (if (null language-name)
      (setq language-name current-language-environment))
  (if (or (null language-name)
	  (null (get-language-info language-name 'documentation)))
      (error "No documentation for the specified language"))
  (if (symbolp language-name)
      (setq language-name (symbol-name language-name)))
  (dolist (feature (get-language-info language-name 'features))
    (require feature))
  (let ((doc (get-language-info language-name 'documentation)))
    (help-setup-xref (list #'describe-language-environment language-name)
		     (called-interactively-p 'interactive))
    (with-output-to-temp-buffer (help-buffer)
      (with-current-buffer standard-output
	(insert language-name " language environment\n\n")
	(if (stringp doc)
	    (insert (substitute-command-keys doc) "\n\n"))
	(condition-case nil
	    (let ((str (eval (get-language-info language-name 'sample-text))))
	      (if (stringp str)
		  (insert "Sample text:\n  "
			  (replace-regexp-in-string "\n" "\n  " str)
			  "\n\n")))
	  (error nil))
	(let ((input-method (get-language-info language-name 'input-method))
	      (l (copy-sequence input-method-alist))
	      (first t))
	  (when (and input-method
		     (setq input-method (assoc input-method l)))
	    (insert "Input methods (default " (car input-method) ")\n")
	    (setq l (cons input-method (delete input-method l))
		  first nil))
	  (dolist (elt l)
	    (when (or (eq input-method elt)
		      (eq t (compare-strings language-name nil nil
					     (nth 1 elt) nil nil t)))
	      (when first
		(insert "Input methods:\n")
		(setq first nil))
	      (insert "  " (car elt))
	      (search-backward (car elt))
	      (help-xref-button 0 'help-input-method (car elt))
	      (goto-char (point-max))
	      (insert " (\""
		      (if (stringp (nth 3 elt)) (nth 3 elt) (car (nth 3 elt)))
		      "\" in mode line)\n")))
	  (or first
	      (insert "\n")))
	(insert "Character sets:\n")
	(let ((l (get-language-info language-name 'charset)))
	  (if (null l)
	      (insert "  nothing specific to " language-name "\n")
	    (while l
	      (insert "  " (symbol-name (car l)))
	      (search-backward (symbol-name (car l)))
	      (help-xref-button 0 'help-character-set (car l))
	      (goto-char (point-max))
	      (insert ": " (charset-description (car l)) "\n")
	      (setq l (cdr l)))))
	(insert "\n")
	(insert "Coding systems:\n")
	(let ((l (get-language-info language-name 'coding-system)))
	  (if (null l)
	      (insert "  nothing specific to " language-name "\n")
	    (while l
	      (insert "  " (symbol-name (car l)))
	      (search-backward (symbol-name (car l)))
	      (help-xref-button 0 'help-coding-system (car l))
	      (goto-char (point-max))
	      (insert (substitute-command-keys " (`")
		      (coding-system-mnemonic (car l))
		      (substitute-command-keys "' in mode line):\n\t")
                      (substitute-command-keys
                       (coding-system-doc-string (car l)))
		      "\n")
	      (let ((aliases (coding-system-aliases (car l))))
		(when aliases
		  (insert "\t(alias:")
		  (while aliases
		    (insert " " (symbol-name (car aliases)))
		    (setq aliases (cdr aliases)))
		  (insert ")\n")))
	      (setq l (cdr l)))))))))
\f
;;; Locales.

(defvar locale-translation-file-name nil
  "File name for the system's file of locale-name aliases, or nil if none.")

;; The following definitions might as well be marked as constants and
;; purecopied, since they're normally used on startup, and probably
;; should reflect the facilities of the base Emacs.
(defconst locale-language-names
  (purecopy
   '(
     ;; Locale names of the form LANGUAGE[_TERRITORY][.CODESET][@MODIFIER]
     ;; as specified in the Single Unix Spec, Version 2.
     ;; LANGUAGE is a language code taken from ISO 639:1988 (E/F)
     ;; with additions from ISO 639/RA Newsletter No.1/1989;
     ;; see Internet RFC 2165 (1997-06) and
     ;; http://www.evertype.com/standards/iso639/iso639-en.html
     ;; TERRITORY is a country code taken from ISO 3166
     ;; http://www.din.de/gremien/nas/nabd/iso3166ma/codlstp1/en_listp1.html.
     ;; CODESET and MODIFIER are implementation-dependent.

     ;; Language names for which there are no locales (yet) are
     ;; commented out.

     ;; jasonr comments: MS Windows uses three letter codes for
     ;; languages instead of the two letter ISO codes that POSIX
     ;; uses.  In most cases the first two letters are the same, so
     ;; most of the regexps in locale-language-names work.  Japanese,
     ;; Chinese, and some others are exceptions, which are listed in the
     ;; non-standard section at the bottom of locale-language-names, or
     ;; in the main section, if otherwise we would pick up the wrong
     ;; entry (because the first matching entry is used).

    ("aa_DJ" . "Latin-1") ; Afar
    ("aa" . "UTF-8")
    ;; ab Abkhazian
    ("af" . "Latin-1") ; Afrikaans
    ("am" "Ethiopic" utf-8) ; Amharic
    ("an" . "Latin-9") ; Aragonese
    ("arn" . "UTF-8") ; MS-Windows Mapudungun, Mapuche
    ("ar" . "Arabic")
    ("as" . "UTF-8") ; Assamese
    ; ay Aymara
    ("az" . "UTF-8") ; Azerbaijani
    ("ba" . "UTF-8") ; Bashkir, Cyrillic script
    ("be" "Belarusian" cp1251) ; Belarusian [Byelorussian until early 1990s]
    ("bg" "Bulgarian" cp1251) ; Bulgarian
    ; bh Bihari
    ; bi Bislama
    ("bn" "Bengali" utf-8) ; Bengali, Bangla
    ("bo" . "Tibetan")
    ("br" . "Latin-1") ; Breton
    ("bs" . "Latin-2") ; Bosnian
    ("byn" . "UTF-8")  ; Bilin; Blin
    ("ca" "Catalan" iso-8859-1) ; Catalan
    ("co" . "UTF-8") ; Corsican
    ("cs" "Czech" iso-8859-2)
    ("cy" "Welsh" iso-8859-14)
    ("da" . "Latin-1") ; Danish
    ("de" "German" iso-8859-1)
    ("dv" . "UTF-8") ; Divehi
    ; dz Bhutani
    ("ee" . "Latin-4") ; Ewe
    ("el" "Greek" iso-8859-7)
    ;; Users who specify "en" explicitly typically want Latin-1, not ASCII.
    ;; That's actually what the GNU locales define, modulo things like
    ;; en_IN -- fx.
    ("en_IN" "English" utf-8) ; glibc uses utf-8 for English in India
    ("en" "English" iso-8859-1) ; English
    ("eo" . "Esperanto") ; Esperanto
    ("es" "Spanish" iso-8859-1)
    ("et" . "Latin-9") ; Estonian
    ("eu" . "Latin-1") ; Basque
    ("fa" "Persian" utf-8) ; Persian
    ("fil" . "UTF-8") ; Filipino
    ("fpo" . "UTF-8") ; MS-Windows Filipino
    ("fi" . "Latin-9") ; Finnish
    ("fj" . "Latin-1") ; Fiji
    ("fo" . "Latin-1") ; Faroese
    ("fr" "French" iso-8859-1) ; French
    ("fy" . "Latin-1") ; Frisian
    ("ga" . "Latin-1") ; Irish Gaelic (new orthography)
    ("gd" . "Latin-9") ; Scots Gaelic
    ("gez" "Ethiopic" utf-8) ; Geez
    ("gla" . "Latin-9") ; MS-Windows Scots Gaelic
    ("gl" . "Latin-1") ; Gallegan; Galician
    ; gn Guarani
    ("gu" "Gujarati" utf-8) ; Gujarati
    ("gv" . "Latin-1") ; Manx Gaelic
    ; ha Hausa
    ("he" "Hebrew" iso-8859-8)
    ("hi" "Devanagari" utf-8) ; Hindi
    ("hni_IN" . "UTF-8") ; Chhattisgarhi
    ("hr" "Croatian" iso-8859-2) ; Croatian
    ("hu" . "Latin-2") ; Hungarian
    ("hy" . "UTF-8") ;  Armenian
    ; ia Interlingua
    ("id" . "Latin-1") ; Indonesian
    ; ie Interlingue
    ("ig" . "UTF-8") ; Igbo (Nigeria)
    ("ibo" . "UTF-8") ; MS-Windows Igbo
    ; ik Inupiak, Inupiaq
    ("is" . "Latin-1") ; Icelandic
    ("it" "Italian" iso-8859-1) ; Italian
    ; iu Inuktitut
    ("iw" "Hebrew" iso-8859-8)
    ("ja" "Japanese" euc-jp)
    ; jw Javanese
    ("kal" . "Latin-1") ; MS-Windows Greenlandic
    ("ka" "Georgian" georgian-ps) ; Georgian
    ("kk" . "UTF-8") ; Kazakh
    ("kl" . "Latin-1") ; Greenlandic
    ("km" "Khmer" utf-8) ; Cambodian, Khmer
    ("knk" "Devanagari" utf-8) ; MS-Windows Konkani
    ("kok" "Devanagari" utf-8) ; Konkani
    ("kn" "Kannada" utf-8)
    ("ko" "Korean" euc-kr)
    ("ks" . "UTF-8") ; Kashmiri
    ; ku Kurdish
    ("kw" . "Latin-1") ; Cornish
    ("ky" . "UTF-8") ; Kirghiz
    ("lao" "Lao" utf-8) ; MS-Windows Lao
    ("la" . "Latin-1") ; Latin
    ("lb" . "Latin-1") ; Luxemburgish
    ("lg" . "Latin-6") ; Ganda, a.k.a. Luganda
    ; ln Lingala
    ("lo" "Lao" utf-8) ; Laothian
    ("lt" "Lithuanian" iso-8859-13)
    ("lv" "Latvian" iso-8859-13) ; Latvian, Lettish
    ; mg Malagasy
    ("mi" . "Latin-7") ; Maori
    ("mk" "Cyrillic-ISO" iso-8859-5) ; Macedonian
    ("mlt" . "Latin-3") ; MS-Windows Maltese
    ("ml" "Malayalam" utf-8)
    ("mn" . "UTF-8") ; Mongolian
    ; mo Moldavian (retired)
    ("mri" . "Latin-7") ; MS-Windows Maori
    ("mr" "Devanagari" utf-8) ; Marathi
    ("ms" . "Latin-1") ; Malay
    ("mt" . "Latin-3") ; Maltese
    ("mym" "Malayalam" utf-8) ; MS-Windows Malayalam
    ("my" "Burmese" utf-8) ; Burmese
    ; na Nauru
    ("nb" . "Latin-1") ; Norwegian
    ("ne" "Devanagari" utf-8) ; Nepali
    ("nl" "Dutch" iso-8859-1)
    ("nn" . "Latin-1") ; Norwegian Nynorsk
    ("non" . "Latin-1") ; MS-Windows Norwegian Nynorsk
    ("no" . "Latin-1") ; Norwegian
    ("nr_ZA" . "UTF-8") ; South Ndebele
    ("nso_ZA" . "UTF-8") ; Pedi
    ("oc" . "Latin-1") ; Occitan
    ("om_ET" . "UTF-8") ; (Afan) Oromo
    ("om" . "Latin-1") ; (Afan) Oromo
    ("or" "Oriya" utf-8)
    ("pa" "Punjabi" utf-8) ; Punjabi
    ("pl" "Polish" iso-8859-2) ; Polish
    ("ps" . "UTF-8") ; Pashto, Pushto
    ("pas" . "UTF-8") ; MS-Windows Pashto
    ("pt_BR" "Brazilian Portuguese" iso-8859-1) ; Brazilian Portuguese
    ("pt" . "Latin-1") ; Portuguese
    ; qu Quechua
    ("rm" . "Latin-1") ; Rhaeto-Romanic
    ; rn Kirundi
    ("ro" "Romanian" iso-8859-2)
    ("ru_RU.koi8r" "Cyrillic-KOI8" koi8-r)
    ("ru_RU" "Russian" iso-8859-5)
    ("ru_UA" "Russian" koi8-u)
    ("rw" . "UTF-8") ; Kinyarwanda
    ("sa" . "Devanagari") ; Sanskrit
    ; sd Sindhi
    ("se" . "UTF-8") ; Northern Sami
    ; sg Sangho
    ("sh" . "Latin-2") ; Serbo-Croatian
    ("si" "Sinhala" utf-8) ; Sinhalese
    ("sid" . "UTF-8") ; Sidamo
    ("sk" "Slovak" iso-8859-2)
    ("sl" "Slovenian" iso-8859-2)
    ; sm Samoan
    ; sn Shona
    ("so_ET" "UTF-8") ; Somali
    ("so" "Latin-1") ; Somali
    ("sq" . "Latin-2") ; Albanian
    ("sr" . "Latin-2") ; Serbian (Latin alphabet)
    ; ss Siswati
    ("st" . "Latin-1") ;  Sesotho
    ; su Sundanese
    ("sv" "Swedish" iso-8859-1)		; Swedish
    ("sw" . "Latin-1") ; Swahili
    ("taj" "Tajik" koi8-t) ; MS-Windows Tajik w/Cyrillic script
    ("ta" "Tamil" utf-8)
    ("te" "Telugu" utf-8) ; Telugu
    ("tg" "Tajik" koi8-t)
    ("th_TH.tis620" "Thai" tis-620)
    ("th_TH.TIS-620" "Thai" tis-620)
    ("th_TH" "Thai" iso-8859-11)
    ("th" "Thai" iso-8859-11)
    ("ti" "Ethiopic" utf-8) ; Tigrinya
    ("tig_ER" . "UTF-8") ; Tigre
    ("tk" . "Latin-5") ; Turkmen
    ("tuk" . "Latin-5") ; MS-Windows Turkmen
    ("tl" . "Latin-1") ; Tagalog
    ("tn" . "Latin-9") ; Setswana, Tswana
    ; to Tonga
    ("tr" "Turkish" iso-8859-9)
    ("tsn" . "Latin-9") ; MS-Windows Tswana
    ("ts" . "Latin-1") ; Tsonga
    ("tt" . "UTF-8") ; Tatar
    ; tw Twi
    ("ug" . "UTF-8") ; Uighur
    ("uk" "Ukrainian" koi8-u)
    ("ur" . "UTF-8") ; Urdu
    ("uz_UZ@cyrillic" . "UTF-8"); Uzbek
    ("uz" . "Latin-1") ; Uzbek
    ("ve" . "UTF-8") ; Venda
    ("vi" "Vietnamese" utf-8)
    ; vo Volapuk
    ("wa" . "Latin-1") ; Walloon
    ("wo" . "UTF-8") ; Wolof
    ("xh" . "Latin-1") ; Xhosa
    ("yi" . "Windows-1255") ; Yiddish
    ("yo" . "UTF-8") ; Yoruba
    ; za Zhuang
    ("zh_HK" . "Chinese-Big5")
    ; zh_HK/BIG5-HKSCS \
    ("zh_TW" . "Chinese-Big5")
    ("zh_CN.GB2312" "Chinese-GB")
    ("zh_CN.GBK" "Chinese-GBK")
    ("zh_CN.GB18030" "Chinese-GB18030")
    ("zh_CN.UTF-8" . "Chinese-GBK")
    ("zh_CN" . "Chinese-GB")
    ("zhh" . "Chinese-Big5") ; MS-Windows Chinese (Hong Kong S.A.R.)
    ("zhi" . "Chinese-GBK") ; MS-Windows Chinese (Singapore)
    ("zhm" . "Chinese-Big5") ; MS-Windows Chinese (Macao S.A.R.)
    ("zh" . "Chinese-GB")
    ("zu" . "Latin-1") ; Zulu

    ;; ISO standard locales
    ("c$" . "ASCII")
    ("posix$" . "ASCII")

    ;; The "IPA" Emacs language environment does not correspond
    ;; to any ISO 639 code, so let it stand for itself.
    ("ipa$" . "IPA")

    ;; Nonstandard or obsolete language codes
    ("cz" . "Czech") ; e.g. Solaris 2.6
    ("iw" . "Hebrew") ; e.g. X11R6.4
    ("sp" . "Cyrillic-ISO") ; Serbian (Cyrillic alphabet), e.g. X11R6.4
    ("su" . "Latin-1") ; Finnish, e.g. Solaris 2.6
    ("jp" . "Japanese") ; e.g. MS Windows
    ("chs" . "Chinese-GBK") ; MS Windows Chinese Simplified (PRC)
    ("cht" . "Chinese-BIG5") ; MS Windows Chinese Traditional (Taiwan)
    ("gbz" . "UTF-8") ; MS Windows Dari Persian
    ("div" . "UTF-8") ; MS Windows Divehi (Maldives)
    ("wee" . "Latin-2") ; MS Windows Lower Sorbian
    ("wen" . "Latin-2") ; MS Windows Upper Sorbian
    ("ind" . "Latin-1") ; MS-Windows Indonesian
    ("sme" . "UTF-8") ; MS-Windows Northern Sami (Norway)
    ("smf" . "UTF-8") ; MS-Windows Northern Sami (Sweden)
    ("smg" . "UTF-8") ; MS-Windows Northern Sami (Finland)
    ("kdi" "Kannada" utf-8) ; MS-Windows Kannada
    ("mar" "Devanagari" utf-8) ; MS-Windows Marathi
    ("khm" "Khmer" utf-8) ; MS-Windows Khmer
    ("iri" . "Latin-1") ; MS-Windows Irish Gaelic
    ; mwk  MS-Windows Mohawk (Canada)
    ("uig" . "UTF-8") ; MS-Windows Uighur
    ("kin" . "UTF-8") ;  MS-Windows Kinyarwanda
    ))
  "Alist of locale regexps vs the corresponding languages and coding systems.
Each element has this form:
  (LOCALE-REGEXP LANG-ENV CODING-SYSTEM)
The first element whose LOCALE-REGEXP matches the start of a
downcased locale specifies the LANG-ENV \(language environment)
and CODING-SYSTEM corresponding to that locale.  If there is no
appropriate language environment, the element may have this form:
  (LOCALE-REGEXP . LANG-ENV)
In this case, LANG-ENV is one of generic language environments for an
specific encoding such as \"Latin-1\" and \"UTF-8\".")

(defconst locale-charset-language-names
  (purecopy
   '((".*8859[-_]?1\\>" . "Latin-1")
     (".*8859[-_]?2\\>" . "Latin-2")
     (".*8859[-_]?3\\>" . "Latin-3")
     (".*8859[-_]?4\\>" . "Latin-4")
     (".*8859[-_]?9\\>" . "Latin-5")
     (".*8859[-_]?14\\>" . "Latin-8")
     (".*8859[-_]?15\\>" . "Latin-9")
     (".*utf\\(?:-?8\\)?\\>" . "UTF-8")
     ;; utf-8@euro exists, so put this last.  (@euro really specifies
     ;; the currency, rather than the charset.)
     (".*@euro\\>" . "Latin-9")))
  "List of pairs of locale regexps and charset language names.
The first element whose locale regexp matches the start of a downcased locale
specifies the language name whose charset corresponds to that locale.
This language name is used if the locale is not listed in
`locale-language-names'.")

(defconst locale-preferred-coding-systems
  (purecopy
   '((".*8859[-_]?1\\>" . iso-8859-1)
     (".*8859[-_]?2\\>" . iso-8859-2)
     (".*8859[-_]?3\\>" . iso-8859-3)
     (".*8859[-_]?4\\>" . iso-8859-4)
     (".*8859[-_]?9\\>" . iso-8859-9)
     (".*8859[-_]?14\\>" . iso-8859-14)
     (".*8859[-_]?15\\>" . iso-8859-15)
     (".*utf\\(?:-?8\\)?" . utf-8)
     ;; utf-8@euro exists, so put this after utf-8.  (@euro really
     ;; specifies the currency, rather than the charset.)
     (".*@euro" . iso-8859-15)
     ("koi8-?r" . koi8-r)
     ("koi8-?u" . koi8-u)
     ("tcvn" . tcvn)
     ("big5[-_]?hkscs" . big5-hkscs)
     ("big5" . big5)
     ("euc-?tw" . euc-tw)
     ("euc-?cn" . euc-cn)
     ("gb2312" . gb2312)
     ("gbk" . gbk)
     ("gb18030" . gb18030)
     ("ja.*[._]euc" . japanese-iso-8bit)
     ("ja.*[._]jis7" . iso-2022-jp)
     ("ja.*[._]pck" . japanese-shift-jis)
     ("ja.*[._]sjis" . japanese-shift-jis)
     ("jpn" . japanese-shift-jis)   ; MS-Windows uses this.
     ))
  "List of pairs of locale regexps and preferred coding systems.
The first element whose locale regexp matches the start of a downcased locale
specifies the coding system to prefer when using that locale.
This coding system is used if the locale specifies a specific charset.")

(defun locale-name-match (key alist)
  "Search for KEY in ALIST, which should be a list of regexp-value pairs.
Return the value corresponding to the first regexp that matches the
start of KEY, or nil if there is no match."
  (let (element)
    (while (and alist (not element))
      (if (string-match-p (concat "\\`\\(?:" (car (car alist)) "\\)") key)
	  (setq element (car alist)))
      (setq alist (cdr alist)))
    (cdr element)))

(defun locale-charset-match-p (charset1 charset2)
  "Whether charset names (strings) CHARSET1 and CHARSET2 are equivalent.
Matching is done ignoring case and any hyphens and underscores in the
names.  E.g. `ISO_8859-1' and `iso88591' both match `iso-8859-1'."
  (setq charset1 (replace-regexp-in-string "[-_]" "" charset1))
  (setq charset2 (replace-regexp-in-string "[-_]" "" charset2))
  (eq t (compare-strings charset1 nil nil charset2 nil nil t)))

(defvar locale-charset-alist nil
  "Coding system alist keyed on locale-style charset name.
Used by `locale-charset-to-coding-system'.")

(defun locale-charset-to-coding-system (charset)
  "Find coding system corresponding to CHARSET.
CHARSET is any sort of non-Emacs charset name, such as might be used
in a locale codeset, or elsewhere.  It is matched to a coding system
first by case-insensitive lookup in `locale-charset-alist'.  Then
matches are looked for in the coding system list, treating case and
the characters `-' and `_' as insignificant.  The coding system base
is returned.  Thus, for instance, if charset \"ISO8859-2\",
`iso-latin-2' is returned."
  (or (car (assoc-string charset locale-charset-alist t))
      (let ((cs coding-system-alist)
	    c)
	(while (and (not c) cs)
	  (if (locale-charset-match-p charset (caar cs))
	      (setq c (intern (caar cs)))
	    (pop cs)))
	(if c (coding-system-base c)))))

;; Fixme: This ought to deal with the territory part of the locale
;; too, for setting things such as calendar holidays, ps-print paper
;; size, spelling dictionary.

(declare-function w32-get-console-codepage "w32proc.c" ())
(declare-function w32-get-console-output-codepage "w32proc.c" ())

(defun locale-translate (locale)
  "Expand LOCALE according to `locale-translation-file-name', if possible.
For example, translate \"swedish\" into \"sv_SE.ISO8859-1\"."
  (if locale-translation-file-name
      (with-temp-buffer
        (set-buffer-multibyte nil)
        (insert-file-contents locale-translation-file-name)
        (if (re-search-forward
             (concat "^" (regexp-quote locale) ":?[ \t]+") nil t)
            (buffer-substring (point) (line-end-position))
          locale))
    locale))

(defun set-locale-environment (&optional locale-name frame)
  "Set up multilingual environment for using LOCALE-NAME.
This sets the language environment, the coding system priority,
the default input method and sometimes other things.

LOCALE-NAME should be a string which is the name of a locale supported
by the system.  Often it is of the form xx_XX.CODE, where xx is a
language, XX is a country, and CODE specifies a character set and
coding system.  For example, the locale name \"ja_JP.EUC\" might name
a locale for Japanese in Japan using the `japanese-iso-8bit'
coding-system.  The name may also have a modifier suffix, e.g. `@euro'
or `@cyrillic'.

If LOCALE-NAME is nil, its value is taken from the environment
variables LC_ALL, LC_CTYPE and LANG (the first one that is set).

The locale names supported by your system can typically be found in a
directory named `/usr/share/locale' or `/usr/lib/locale'.  LOCALE-NAME
will be translated according to the table specified by
`locale-translation-file-name'.

If FRAME is non-nil, only set the keyboard coding system and the
terminal coding system for the terminal of that frame, and don't
touch session-global parameters like the language environment.

See also `locale-charset-language-names', `locale-language-names',
`locale-preferred-coding-systems' and `locale-coding-system'."
  (interactive "sSet environment for locale: ")

  ;; Do this at runtime for the sake of binaries possibly transported
  ;; to a system without X.
  (setq locale-translation-file-name
	(let ((files
	       '("/usr/share/X11/locale/locale.alias" ; e.g. X11R7
		 "/usr/lib/X11/locale/locale.alias" ; e.g. X11R6.4
		 "/usr/X11R6/lib/X11/locale/locale.alias" ; XFree86, e.g. RedHat 4.2
		 "/usr/openwin/lib/locale/locale.alias" ; e.g. Solaris 2.6
		 ;;
		 ;; The following name appears after the X-related names above,
		 ;; since the X-related names are what X actually uses.
		 "/usr/share/locale/locale.alias" ; GNU/Linux sans X
		 )))
	  (while (and files (not (file-exists-p (car files))))
	    (setq files (cdr files)))
	  (car files)))

  (let ((locale locale-name))

    (unless locale
      ;; Use the first of these three environment variables
      ;; that has a nonempty value.
      (let ((vars '("LC_ALL" "LC_CTYPE" "LANG")))
	(while (and vars
		    (= 0 (length locale))) ; nil or empty string
	  (setq locale (getenv (pop vars) frame)))))

    (when locale
      (setq locale (locale-translate locale))

      ;; Leave the system locales alone if the caller did not specify
      ;; an explicit locale name, as their defaults are set from
      ;; LC_MESSAGES and LC_TIME, not LC_CTYPE, and the user might not
      ;; want to set them to the same value as LC_CTYPE.
      (when locale-name
	(setq system-messages-locale locale)
	(setq system-time-locale locale))

      (if (string-match "^[a-z][a-z]" locale)
          ;; The value of 'current-iso639-language' is matched against
          ;; the ':lang' property of font-spec objects when selecting
          ;; and prioritizing available fonts for displaying
          ;; characters; see fontset.c.
	  (setq current-iso639-language
                ;; The call to 'downcase' is for w32, where the
                ;; MS-Windows locale names are in caps, as in "ENU",
                ;; the equivalent of the Posix "en_US".  Since the
                ;; match mentioned above uses memq, and ':lang'
                ;; properties have lower-case values, the letter-case
                ;; must match exactly.
                (intern (downcase (match-string 0 locale))))))

    (setq woman-locale
          (or system-messages-locale
              (let ((msglocale (getenv "LC_MESSAGES" frame)))
                (if (zerop (length msglocale))
                    locale
                  (locale-translate msglocale)))))

    (when locale
      (setq locale (downcase locale))

      (let ((language-name
	     (locale-name-match locale locale-language-names))
	    (charset-language-name
	     (locale-name-match locale locale-charset-language-names))
	    (default-eol-type (coding-system-eol-type
			       (default-value 'buffer-file-coding-system)))
	    (coding-system
	     (or (locale-name-match locale locale-preferred-coding-systems)
		 (when locale
		   (if (string-match "\\.\\([^@]+\\)" locale)
		       (locale-charset-to-coding-system
			(match-string 1 locale)))))))

	(if (consp language-name)
	    ;; locale-language-names specify both lang-env and coding.
	    ;; But, what specified in locale-preferred-coding-systems
	    ;; has higher priority.
	    (setq coding-system (or coding-system
				    (nth 1 language-name))
		  language-name (car language-name))
	  ;; Otherwise, if locale is not listed in locale-language-names,
	  ;; use what listed in locale-charset-language-names.
	  (if (not language-name)
	      (setq language-name charset-language-name)))

	;; If a specific EOL conversion was specified in the default
	;; buffer-file-coding-system, preserve it in the coding system
	;; we will be using from now on.
	(if (and (memq default-eol-type '(0 1 2 unix dos mac))
		 coding-system
		 (coding-system-p coding-system))
	    (setq coding-system (coding-system-change-eol-conversion
				 coding-system default-eol-type)))

	(when language-name

	  ;; Set up for this character set.  This is now the right way
	  ;; to do it for both unibyte and multibyte modes.
	  (unless frame
	    (set-language-environment language-name))

	  (set-display-table-and-terminal-coding-system
	   language-name coding-system frame)

	  ;; Set the `keyboard-coding-system' if appropriate (tty
	  ;; only).  At least X and MS Windows can generate
	  ;; multilingual input.
	  ;; XXX This was disabled unless `window-system', but that
	  ;; leads to buggy behavior when a tty frame is opened
	  ;; later.  Setting the keyboard coding system has no adverse
	  ;; effect on X, so let's do it anyway. -- Lorentey
	  (let ((kcs (or coding-system
			 (car (get-language-info language-name
						 'coding-system)))))
	    (if kcs (set-keyboard-coding-system kcs frame)))

	  (unless frame
	    (setq locale-coding-system
		  (car (get-language-info language-name 'coding-priority)))))

	(when (and (not frame)
		   coding-system
		   (not (coding-system-equal coding-system
					     locale-coding-system)))
	  (prefer-coding-system coding-system)
	  ;; Fixme: perhaps prefer-coding-system should set this too.
	  ;; But it's not the time to do such a fundamental change.
	  (setq default-sendmail-coding-system coding-system)
	  (setq locale-coding-system coding-system))))

    ;; On Windows, override locale-coding-system,
    ;; default-file-name-coding-system, keyboard-coding-system,
    ;; terminal-coding-system with the ANSI or console codepage.
    (when (and (eq system-type 'windows-nt)
               (boundp 'w32-ansi-code-page))
      (let* ((ansi-code-page-coding
              (intern (format "cp%d" w32-ansi-code-page)))
             (code-page-coding
              (if noninteractive
                  (intern (format "cp%d" (w32-get-console-codepage)))
                ansi-code-page-coding))
             (output-coding
              (if noninteractive
                  (intern (format "cp%d" (w32-get-console-output-codepage)))
                code-page-coding))
             (multibyte-code-page-coding
              (or (and (boundp 'w32-multibyte-code-page)
                       (not (zerop w32-multibyte-code-page))
                       (intern (format "cp%d" w32-multibyte-code-page)))
                  code-page-coding))
             (locale-coding
              (if noninteractive
                  code-page-coding
                multibyte-code-page-coding)))
	(when (and (coding-system-p code-page-coding)
                   (coding-system-p locale-coding))
          (or output-coding (setq output-coding code-page-coding))
	  (unless frame (setq locale-coding-system locale-coding))
	  (set-keyboard-coding-system code-page-coding frame)
	  (set-terminal-coding-system output-coding frame)
	  (setq default-file-name-coding-system ansi-code-page-coding))))

    (when (eq system-type 'darwin)
      ;; On Darwin, file names are always encoded in utf-8, no matter
      ;; the locale.
      (setq default-file-name-coding-system 'utf-8-unix)
      ;; macOS's Terminal.app by default uses utf-8 regardless of
      ;; the locale.
      (when (and (null window-system)
		 (equal (getenv "TERM_PROGRAM" frame) "Apple_Terminal"))
	(set-terminal-coding-system 'utf-8)
	(set-keyboard-coding-system 'utf-8)))

    ;; Default to A4 paper if we're not in a C, POSIX or US locale.
    ;; (See comments in Flocale_info.)
    (unless frame
      (let ((paper (locale-info 'paper))
            locale)
	(if paper
	    (cond
	     ((equal paper '(216 279))
	      (setq ps-paper-type 'letter))
	     ((equal paper '(210 297))
	      (setq ps-paper-type 'a4)))
	  (let ((vars '("LC_ALL" "LC_PAPER" "LANG")))
	    (while (and vars (= 0 (length locale)))
	      (setq locale (getenv (pop vars) frame))))
	  (when locale
	    ;; As of glibc 2.2.5, these are the only US Letter locales,
	    ;; and the rest are A4.
	    (setq ps-paper-type
		  (or (locale-name-match locale '(("c$" . letter)
						  ("posix$" . letter)
						  (".._us" . letter)
						  (".._pr" . letter)
						  (".._ca" . letter)
						  ("enu$" . letter) ; Windows
						  ("esu$" . letter)
						  ("enc$" . letter)
						  ("frc$" . letter)))
		      'a4)))))))
  nil)
\f
;;; Character property

(put 'char-code-property-table 'char-table-extra-slots 5)

(defun define-char-code-property (name table &optional docstring)
  "Define NAME as a character code property given by TABLE.
TABLE is a char-table of purpose `char-code-property-table' with
these extra slots:
  1st: NAME.
  2nd: Function to call to get a property value of a character.
    It is called with three arguments CHAR, VAL, and TABLE, where
    CHAR is a character, VAL is the value of (aref TABLE CHAR).
  3rd: Function to call to put a property value of a character.
    It is called with the same arguments as above.
  4th: Function to call to get a description string of a property value.
    It is called with one argument VALUE, a property value.
  5th: Data used by the above functions.

TABLE may be a name of file to load to build a char-table.  The
file should contain a call of `define-char-code-property' with a
char-table of the above format as the argument TABLE.

TABLE may also be nil, in which case no property value is pre-assigned.

Optional 3rd argument DOCSTRING is a documentation string of the property.

See also the documentation of `get-char-code-property' and
`put-char-code-property'."
  (or (symbolp name)
      (error "Not a symbol: %s" name))
  (if (char-table-p table)
      (or (and (eq (char-table-subtype table) 'char-code-property-table)
	       (eq (char-table-extra-slot table 0) name))
	  (error "Invalid char-table: %s" table))
    (or (stringp table)
	(error "Not a char-table nor a file name: %s" table)))
  (if (stringp table) (setq table (purecopy table)))
  (setf (alist-get name char-code-property-alist) table)
  (put name 'char-code-property-documentation (purecopy docstring)))

(defvar char-code-property-table
  (make-char-table 'char-code-property-table)
  "Char-table containing a property list of each character code.
This table is used for properties not listed in `char-code-property-alist'.
See also the documentation of `get-char-code-property' and
`put-char-code-property'.")

(defun get-char-code-property (char propname)
  "Return the value of CHAR's PROPNAME property."
  (let ((table (unicode-property-table-internal propname)))
    (if table
	(let ((func (char-table-extra-slot table 1)))
	  (if (functionp func)
	      (funcall func char (aref table char) table)
	    (get-unicode-property-internal table char)))
      (plist-get (aref char-code-property-table char) propname))))

(defun put-char-code-property (char propname value)
  "Store CHAR's PROPNAME property with VALUE.
It can be retrieved with `(get-char-code-property CHAR PROPNAME)'."
  (let ((table (unicode-property-table-internal propname)))
    (if table
	(let ((func (char-table-extra-slot table 2)))
	  (if (functionp func)
	      (funcall func char value table)
	    (put-unicode-property-internal table char value)))
      (let* ((plist (aref char-code-property-table char))
	     (x (plist-put plist propname value)))
	(or (eq x plist)
	    (aset char-code-property-table char x))))
    value))

(defun char-code-property-description (prop value)
  "Return a description string of character property PROP's value VALUE.
If there's no description string for VALUE, return nil."
  (let ((table (unicode-property-table-internal prop)))
    (if table
	(let ((func (char-table-extra-slot table 3)))
	  (if (functionp func)
	      (funcall func value))))))

\f
;; Pretty description of encoded string

;; Alist of ISO 2022 control code vs the corresponding mnemonic string.
(defconst iso-2022-control-alist
  '((?\x1b . "ESC")
    (?\x0e . "SO")
    (?\x0f . "SI")
    (?\x8e . "SS2")
    (?\x8f . "SS3")
    (?\x9b . "CSI")))

(defun encoded-string-description (str coding-system)
  "Return a pretty description of STR that is encoded by CODING-SYSTEM.
STR should be a unibyte string."
  (cl-assert (not (multibyte-string-p str)))
  (mapconcat
   (if (and coding-system (eq (coding-system-type coding-system) 'iso-2022))
       ;; Try to get a pretty description for ISO 2022 escape sequences.
       (lambda (x) (or (cdr (assq x iso-2022-control-alist))
                  (format "#x%02X" x)))
     (lambda (x) (format "#x%02X" x)))
   str " "))

(defun encode-coding-char (char coding-system &optional charset)
  "Encode CHAR by CODING-SYSTEM and return the resulting string.
If CODING-SYSTEM can't safely encode CHAR, return nil.
The 3rd optional argument CHARSET, if non-nil, is a charset preferred
on encoding."
  (let* ((str1 (string char))
	 (str2 (string char char))
	 (found (find-coding-systems-string str1))
	enc1 enc2 i1 i2)
    (if (eq (car-safe found) 'undecided) ;Aka (not (multibyte-string-p str1))
        ;; `char' is ASCII.
	(encode-coding-string str1 coding-system)
      (when (memq (coding-system-base coding-system) found)
	;; We must find the encoded string of CHAR.  But, just encoding
	;; CHAR will put extra control sequences (usually to designate
	;; ASCII charset) at the tail if type of CODING is ISO 2022.
	;; To exclude such tailing bytes, we at first encode one-char
	;; string and two-char string, then check how many bytes at the
	;; tail of both encoded strings are the same.

	(when charset
	  (put-text-property 0 1 'charset charset str1)
	  (put-text-property 0 2 'charset charset str2))
	(setq enc1 (encode-coding-string str1 coding-system)
	      i1 (length enc1)
	      enc2 (encode-coding-string str2 coding-system)
	      i2 (length enc2))
	(while (and (> i1 0) (= (aref enc1 (1- i1)) (aref enc2 (1- i2))))
	  (setq i1 (1- i1) i2 (1- i2)))

	;; Now (substring enc1 i1) and (substring enc2 i2) are the same,
	;; and they are the extra control sequences at the tail to
	;; exclude.
	(substring enc2 0 i2)))))

;; Backwards compatibility.  These might be better with :init-value t,
;; but that breaks loadup.
(define-minor-mode unify-8859-on-encoding-mode
  "Exists only for backwards compatibility."
  :group 'mule
  :global t)
;; Doc said "obsolete" in 23.1, this statement only added in 24.1.
(make-obsolete 'unify-8859-on-encoding-mode "don't use it." "23.1")

(define-minor-mode unify-8859-on-decoding-mode
  "Exists only for backwards compatibility."
  :group 'mule
  :global t)
;; Doc said "obsolete" in 23.1, this statement only added in 24.1.
(make-obsolete 'unify-8859-on-decoding-mode "don't use it." "23.1")

(defvar ucs-names nil
  "Hash table of cached CHAR-NAME keys to CHAR-CODE values.")

(defun ucs-names ()
  "Return table of CHAR-NAME keys and CHAR-CODE values cached in `ucs-names'."
  (or ucs-names
      (let ((ranges
	     '((#x0000 . #x33FF)
	       ;; (#x3400 . #x4DBF) CJK Ideographs Extension A
	       (#x4DC0 . #x4DFF)
	       ;; (#x4E00 . #x9FFF) CJK Unified Ideographs
	       (#xA000 . #xD7FF)
	       ;; (#xD800 . #xF8FF) Surrogate/Private
	       (#xFB00 . #x134FF)
	       ;; (#x13500 . #x143FF) unused
               (#x14400 . #x14646)
	       ;; (#x14647 . #x167FF) unused
	       (#x16800 . #x16F9F)
               (#x16FE0 . #x16FE3)
               ;; (#x17000 . #x187FF) Tangut Ideographs
               ;; (#x18800 . #x18AFF) Tangut Components
               ;; (#x18B00 . #x18CFF) Khitan Small Script
               ;; (#x18D00 . #x18D0F) Tangut Ideograph Supplement
	       ;; (#x18D10 . #x1AFFF) unused
	       (#x1B000 . #x1B11F)
               ;; (#x1B120 . #x1B14F) unused
               (#x1B150 . #x1B16F)
               (#x1B170 . #x1B2FF)
	       ;; (#x1B300 . #x1BBFF) unused
               (#x1BC00 . #x1BCAF)
	       ;; (#x1BCB0 . #x1CFFF) unused
	       (#x1D000 . #x1FFFF)
	       ;; (#x20000 . #xDFFFF) CJK Ideograph Extension A, B, etc, unused
	       (#xE0000 . #xE01FF)))
	    (gc-cons-threshold 10000000)
	    (names (make-hash-table :size 42943 :test #'equal)))
        (dolist (range ranges)
          (let ((c (car range))
	        (end (cdr range)))
	    (while (<= c end)
	      (let ((new-name (get-char-code-property c 'name))
		    (old-name (get-char-code-property c 'old-name)))
	        ;; In theory this code could end up pushing an "old-name" that
	        ;; shadows a "new-name" but in practice every time an
	        ;; `old-name' conflicts with a `new-name', the newer one has a
	        ;; higher code, so it gets pushed later!
	        (if new-name (puthash new-name c names))
	        (if old-name (puthash old-name c names))
                ;; Unicode uses the spelling "lamda" in character
                ;; names, instead of "lambda", due to "preferences
                ;; expressed by the Greek National Body" (Bug#30513).
                ;; Some characters have an old-name with the "lambda"
                ;; spelling, but others don't.  Add the traditional
                ;; spelling for more convenient completion.
                (when (and (not old-name) new-name
                           (string-match "\\<LAMDA\\>" new-name))
                  (puthash (replace-match "LAMBDA" t t new-name) c names))
	        (setq c (1+ c))))))
        ;; Special case for "BELL" which is apparently the only char which
        ;; doesn't have a new name and whose old-name is shadowed by a newer
        ;; char with that name.
        (puthash "BELL (BEL)" ?\a names)
        (setq ucs-names names))))

(defun mule--ucs-names-affixation (names)
  (mapcar (lambda (name)
            (let ((char (gethash name ucs-names)))
              (list name (concat (if char (format "%c" char) " ") "\t") "")))
          names))

(defun char-from-name (string &optional ignore-case)
  "Return a character as a number from its Unicode name STRING.
If optional IGNORE-CASE is non-nil, ignore case in STRING.
Return nil if STRING does not name a character."
  (or (gethash (if ignore-case (upcase string) string) (ucs-names))
      (let ((minus (string-match-p "-[0-9A-F]+\\'" string)))
        (when minus
          ;; Parse names like "VARIATION SELECTOR-17" and "CJK
          ;; COMPATIBILITY IDEOGRAPH-F900" that are not in ucs-names.
          (ignore-errors
            (let* ((case-fold-search ignore-case)
                   (vs (string-match-p "\\`VARIATION SELECTOR-" string))
                   (minus-num (string-to-number (substring string minus)
                                                (if vs 10 16)))
                   (vs-offset (if vs (if (< minus-num -16) #xE00EF #xFDFF) 0))
                   (code (- vs-offset minus-num))
                   (name (get-char-code-property code 'name)))
              (when (eq t (compare-strings string nil nil name nil nil
                                           ignore-case))
                code)))))))

(defun read-char-by-name (prompt)
  "Read a character by its Unicode name or hex number string.
Display PROMPT and read a string that represents a character by its
Unicode property `name' or `old-name'.

This function returns the character as a number.

You can type a few of the first letters of the Unicode name and
use completion.  If you type a substring of the Unicode name
preceded by an asterisk `*' and use completion, it will show all
the characters whose names include that substring, not necessarily
at the beginning of the name.

Accept a name like \"CIRCULATION FUNCTION\", a hexadecimal
number like \"2A10\", or a number in hash notation (e.g.,
\"#x2a10\" for hex, \"10r10768\" for decimal, or \"#o25020\" for
octal).  Treat otherwise-ambiguous strings like \"BED\" (U+1F6CF)
as names, not numbers."
  (let* ((enable-recursive-minibuffers t)
	 (completion-ignore-case t)
	 (completion-tab-width 4)
	 (input
	  (completing-read
	   prompt
	   (lambda (string pred action)
	     (if (eq action 'metadata)
		 '(metadata
		   (affixation-function . mule--ucs-names-affixation)
		   (category . unicode-name))
	       (complete-with-action action (ucs-names) string pred)))))
	 (char
          (cond
           ((char-from-name input t))
           ((string-match-p "\\`[[:xdigit:]]+\\'" input)
            (ignore-errors (string-to-number input 16)))
           ((string-match-p "\\`#\\([bBoOxX]\\|[0-9]+[rR]\\)[0-9a-zA-Z]+\\'"
                            input)
            (ignore-errors (read input))))))
    (unless (characterp char)
      (error "Invalid character"))
    char))

(define-obsolete-function-alias 'ucs-insert 'insert-char "24.3")
(define-key ctl-x-map "8\r" 'insert-char)

;;; mule-cmds.el ends here

debug log:

solving 99c014e310 ...
found 99c014e310 in https://yhetil.org/emacs-bugs/CADwFkm=pXm4PDHGXgHY+xX1BT0DGESar1EWZBcSZsA2c3gF9Mg@mail.gmail.com/
found d59f2c0ebf in https://git.savannah.gnu.org/cgit/emacs.git
preparing index
index prepared:
100644 d59f2c0ebfca4cd428b46a3682a1d9b74ce5d316	lisp/international/mule-cmds.el

applying [1/1] https://yhetil.org/emacs-bugs/CADwFkm=pXm4PDHGXgHY+xX1BT0DGESar1EWZBcSZsA2c3gF9Mg@mail.gmail.com/
diff --git a/lisp/international/mule-cmds.el b/lisp/international/mule-cmds.el
index d59f2c0ebf..99c014e310 100644

Checking patch lisp/international/mule-cmds.el...
Applied patch lisp/international/mule-cmds.el cleanly.

index at:
100644 99c014e310e4113c8f8a7479a5e255e583706db0	lisp/international/mule-cmds.el

(*) 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).