--- chars.c.~1.35.~	2004-04-15 10:58:00.000000000 +1000
+++ chars.c	2004-04-18 10:18:19.000000000 +1000
@@ -1,4 +1,4 @@
-/*	Copyright (C) 1995,1996,1998, 2000, 2001 Free Software Foundation, Inc.
+/*	Copyright (C) 1995,1996,1998, 2000, 2001, 2004 Free Software Foundation, Inc.
  * 
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
@@ -19,6 +19,7 @@
 
 
 #include <ctype.h>
+#include <limits.h>
 #include "libguile/_scm.h"
 #include "libguile/validate.h"
 
@@ -260,7 +261,7 @@
 #define FUNC_NAME s_scm_char_upcase
 {
   SCM_VALIDATE_CHAR (1, chr);
-  return SCM_MAKE_CHAR(scm_c_upcase (SCM_CHAR(chr)));
+  return SCM_MAKE_CHAR (toupper (SCM_CHAR (chr)));
 }
 #undef FUNC_NAME
 
@@ -271,7 +272,7 @@
 #define FUNC_NAME s_scm_char_downcase
 {
   SCM_VALIDATE_CHAR (1, chr);
-  return SCM_MAKE_CHAR(scm_c_downcase (SCM_CHAR(chr)));
+  return SCM_MAKE_CHAR (tolower (SCM_CHAR(chr)));
 }
 #undef FUNC_NAME
 
@@ -279,25 +280,6 @@
 
 
 
-static unsigned char scm_c_upcase_table[SCM_CHAR_CODE_LIMIT];
-static unsigned char scm_c_downcase_table[SCM_CHAR_CODE_LIMIT];
-static const unsigned char scm_lowers[] = "abcdefghijklmnopqrstuvwxyz";
-static const unsigned char scm_uppers[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
-
-
-void 
-scm_tables_prehistory ()
-{
-  int i;
-  for (i = 0; i < SCM_CHAR_CODE_LIMIT; i++)
-    scm_c_upcase_table[i] = scm_c_downcase_table[i] = i;
-  for (i = 0; i < (int) (sizeof scm_lowers / sizeof (scm_lowers[0])); i++)
-    {
-      scm_c_upcase_table[scm_lowers[i]] = scm_uppers[i];
-      scm_c_downcase_table[scm_uppers[i]] = scm_lowers[i];
-    }
-}
-
 /*
 TODO: change name  to scm_i_.. ? --hwn
 */
@@ -306,8 +288,8 @@
 int
 scm_c_upcase (unsigned int c)
 {
-  if (c < sizeof (scm_c_upcase_table))
-    return scm_c_upcase_table[c];
+  if (c <= UCHAR_MAX)
+    return toupper (c);
   else
     return c;
 }
@@ -316,8 +298,8 @@
 int
 scm_c_downcase (unsigned int c)
 {
-  if (c < sizeof (scm_c_downcase_table))
-    return scm_c_downcase_table[c];
+  if (c <= UCHAR_MAX)
+    return tolower (c);
   else
     return c;
 }