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authorLudovic Courtès <ludo@gnu.org>2012-02-03 10:51:46 +0100
committerLudovic Courtès <ludo@gnu.org>2012-02-03 10:51:46 +0100
commiteb4a14ed47a34e03566261b02c77bfcc02b20134 (patch)
tree23d7e5a0df3aa502b1b5802a0e6c75cfbef87519 /lib/strncasecmp.c
parent1ba05158ebe033d7d0bdfcfef686eae2c9ea0103 (diff)
downloadguile-eb4a14ed47a34e03566261b02c77bfcc02b20134.tar.gz
Use Gnulib's `regex' module.
This should help with regex portability, as reported in <http://bugs.gnu.org/10684> for Darwin 8.11. * m4/gnulib-cache.m4 (gl_MODULES): Add `regex'. * configure.ac: Remove header checks for regex.h, rxposix.h, and rx/rxposix.h. Remove check for the `regcomp' function. Remove definition of `HAVE_REGCOMP'. Define `ENABLE_REGEX'. * libguile/init.c: Check for `ENABLE_REGEX' instead of `HAVE_REGCOMP'. * libguile/regex-posix.c: Always include <regex.h>. Remove #ifdefs for rxposix.h and co.
Diffstat (limited to 'lib/strncasecmp.c')
-rw-r--r--lib/strncasecmp.c63
1 files changed, 63 insertions, 0 deletions
diff --git a/lib/strncasecmp.c b/lib/strncasecmp.c
new file mode 100644
index 000000000..d330ff678
--- /dev/null
+++ b/lib/strncasecmp.c
@@ -0,0 +1,63 @@
+/* strncasecmp.c -- case insensitive string comparator
+ Copyright (C) 1998-1999, 2005-2007, 2009-2012 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 <string.h>
+
+#include <ctype.h>
+#include <limits.h>
+
+#define TOLOWER(Ch) (isupper (Ch) ? tolower (Ch) : (Ch))
+
+/* Compare no more than N bytes 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.
+ Note: This function cannot work correctly in multibyte locales. */
+
+int
+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 = TOLOWER (*p1);
+ c2 = 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);
+}