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authorLudovic Courtès <ludo@gnu.org>2009-05-27 16:50:40 +0200
committerLudovic Courtès <ludo@gnu.org>2009-05-28 23:12:00 +0200
commit24d56127bb0f07bcb477e2c73ccc3cac0c51ee73 (patch)
treea29b95481b40895bec74142104768f88e5320d77 /lib/c-strncasecmp.c
parent21346c4f5e30910e3950c40bc267bb4249973240 (diff)
downloadguile-24d56127bb0f07bcb477e2c73ccc3cac0c51ee73.tar.gz
Use GNU libunistring and Gnulib modules needed by R6RS bytevectors and ports.
* m4/gnulib-cache.m4 (gl_MODULES): Add `byteswap', `iconv_open-utf', `libunistring', `striconveh', and `string'.
Diffstat (limited to 'lib/c-strncasecmp.c')
-rw-r--r--lib/c-strncasecmp.c57
1 files changed, 57 insertions, 0 deletions
diff --git a/lib/c-strncasecmp.c b/lib/c-strncasecmp.c
new file mode 100644
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+++ b/lib/c-strncasecmp.c
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+/* c-strncasecmp.c -- case insensitive string comparator in C locale
+ Copyright (C) 1998-1999, 2005-2006 Free Software Foundation, Inc.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU Lesser 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 Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser 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. */
+
+#include <config.h>
+
+/* 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);
+}