--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2005-10-11  Bruno Haible  <bruno@clisp.org>
+
+	* modules/c-strcase: New file.
+	* MODULES.html.sh (String handling <string.h>): Add c-strcase.
+
 2005-10-11  Simon Josefsson  <jas@extundo.com>
 
 	* tests/test-crc.c: New file.

--- a/MODULES.html.sh
+++ b/MODULES.html.sh
@@ -1526,6 +1526,7 @@
   func_module memrchr
   func_module stpcpy
   func_module stpncpy
+  func_module c-strcase
   func_module strcase
   func_module strcasestr
   func_module strchrnul

--- a/lib/ChangeLog
+++ b/lib/ChangeLog
@@ -1,3 +1,9 @@
+2005-10-11  Bruno Haible  <bruno@clisp.org>
+
+	* c-strcase.h: New file, from GNU gettext.
+	* c-strcasecmp.c: New file, from GNU gettext.
+	* c-strncasecmp.c: New file, from GNU gettext.
+
 2005-10-11  Simon Josefsson  <jas@extundo.com>
 
 	* crc.h, crc.c: New files.

new file mode 100644
--- /dev/null
+++ b/lib/c-strcase.h
@@ -0,0 +1,55 @@
+/* Case-insensitive string comparison functions in C locale.
+   Copyright (C) 1995-1996, 2001, 2003, 2005 Free Software Foundation, Inc.
+
+   This program 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 2, or (at your option)
+   any later version.
+
+   This program 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 this program; if not, write to the Free Software Foundation,
+   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
+
+#ifndef C_STRCASE_H
+#define C_STRCASE_H
+
+#include <stddef.h>
+
+
+/* The functions defined in this file assume the "C" locale and a character
+   set without diacritics (ASCII-US or EBCDIC-US or something like that).
+   Even if the "C" locale on a particular system is an extension of the ASCII
+   character set (like on BeOS, where it is UTF-8, or on AmigaOS, where it
+   is ISO-8859-1), the functions in this file recognize only the ASCII
+   characters.  More precisely, one of the string arguments must be an ASCII
+   string; the other one can also contain non-ASCII characters (but then
+   the comparison result will be nonzero).  */
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+/* Compare strings S1 and S2, ignoring case, returning less than, equal to or
+   greater than zero if S1 is lexicographically less than, equal to or greater
+   than S2.  */
+extern int c_strcasecmp (const char *s1, const char *s2);
+
+/* Compare no more than N characters of strings S1 and S2, ignoring case,
+   returning less than, equal to or greater than zero if S1 is
+   lexicographically less than, equal to or greater than S2.  */
+extern int c_strncasecmp (const char *s1, const char *s2, size_t n);
+
+
+#ifdef __cplusplus
+}
+#endif
+
+
+#endif /* C_STRCASE_H */

new file mode 100644
--- /dev/null
+++ b/lib/c-strcasecmp.c
@@ -0,0 +1,59 @@
+/* c-strcasecmp.c -- case insensitive string comparator in C locale
+   Copyright (C) 1998, 1999, 2005 Free Software Foundation, Inc.
+
+   This program 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 2, or (at your option)
+   any later version.
+
+   This program 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 this program; if not, write to the Free Software Foundation,
+   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+/* Specification.  */
+#include "c-strcase.h"
+
+#include <limits.h>
+
+#include "c-ctype.h"
+
+int
+c_strcasecmp (const char *s1, const char *s2)
+{
+  register const unsigned char *p1 = (const unsigned char *) s1;
+  register const unsigned char *p2 = (const unsigned char *) s2;
+  unsigned char c1, c2;
+
+  if (p1 == p2)
+    return 0;
+
+  do
+    {
+      c1 = c_tolower (*p1);
+      c2 = c_tolower (*p2);
+
+      if (c1 == '\0')
+	break;
+
+      ++p1;
+      ++p2;
+    }
+  while (c1 == c2);
+
+  if (UCHAR_MAX <= INT_MAX)
+    return c1 - c2;
+  else
+    /* On machines where 'char' and 'int' are types of the same size, the
+       difference of two 'unsigned char' values - including the sign bit -
+       doesn't fit in an 'int'.  */
+    return (c1 > c2 ? 1 : c1 < c2 ? -1 : 0);
+}

new file mode 100644
--- /dev/null
+++ b/lib/c-strncasecmp.c
@@ -0,0 +1,59 @@
+/* c-strncasecmp.c -- case insensitive string comparator in C locale
+   Copyright (C) 1998, 1999, 2005 Free Software Foundation, Inc.
+
+   This program 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 2, or (at your option)
+   any later version.
+
+   This program 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 this program; if not, write to the Free Software Foundation,
+   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+/* Specification.  */
+#include "c-strcase.h"
+
+#include <limits.h>
+
+#include "c-ctype.h"
+
+int
+c_strncasecmp (const char *s1, const char *s2, size_t n)
+{
+  register const unsigned char *p1 = (const unsigned char *) s1;
+  register const unsigned char *p2 = (const unsigned char *) s2;
+  unsigned char c1, c2;
+
+  if (p1 == p2 || n == 0)
+    return 0;
+
+  do
+    {
+      c1 = c_tolower (*p1);
+      c2 = c_tolower (*p2);
+
+      if (--n == 0 || c1 == '\0')
+	break;
+
+      ++p1;
+      ++p2;
+    }
+  while (c1 == c2);
+
+  if (UCHAR_MAX <= INT_MAX)
+    return c1 - c2;
+  else
+    /* On machines where 'char' and 'int' are types of the same size, the
+       difference of two 'unsigned char' values - including the sign bit -
+       doesn't fit in an 'int'.  */
+    return (c1 > c2 ? 1 : c1 < c2 ? -1 : 0);
+}

new file mode 100644
--- /dev/null
+++ b/modules/c-strcase
@@ -0,0 +1,25 @@
+Description:
+Case-insensitive string comparison functions in C locale.
+
+Files:
+lib/c-strcase.h
+lib/c-strcasecmp.c
+lib/c-strncasecmp.c
+
+Depends-on:
+c-ctype
+
+configure.ac:
+
+Makefile.am:
+lib_SOURCES += c-strcase.h c-strcasecmp.c c-strncasecmp.c
+
+Include:
+"c-strcase.h"
+
+License:
+LGPL
+
+Maintainer:
+Bruno Haible
+