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trader/lib/c-strncasecmp.c
John Zaitseff 87a840cdd4 Update all auto-generated files
These files have been created by running ./build-aux/bootstrap with
Gnulib as at commit 5bb169c3be1f80fb22ee63d51b43dfdb1ac22d2a (with a date
stamp of Mon Aug 3 12:34:38 2015 -0700), Autoconf 2.69, Automake 1.15 and
Gettext 0.19.5.
2015-08-18 09:43:46 +10:00

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1.6 KiB
C

/* c-strncasecmp.c -- case insensitive string comparator in C locale
Copyright (C) 1998-1999, 2005-2006, 2009-2015 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 3, 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, see <http://www.gnu.org/licenses/>. */
#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);
}