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/* strcasecmp.c - case-insensitive strcmp
Copyright 2008, 2010 Karl Berry.
Copyright 1991, 1992, 1995 Free Software Foundation, Inc.
This file was part of the GNU C Library.
Modified by Karl Berry for kpathsea.
This library 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 2.1 of the License, or (at your option) any later version.
This library 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 library; if not, see <http://www.gnu.org/licenses/>. */
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <ctype.h>
/* Compare S1 and S2, ignoring case, returning less than, equal to or
greater than zero if S1 is lexiographically less than,
equal to or greater than S2. */
int
strcasecmp (s1, s2)
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 = tolower (*p1++);
c2 = tolower (*p2++);
if (c1 == '\0')
break;
}
while (c1 == c2);
return c1 - c2;
}
int
strncasecmp (s1, s2, n)
const char *s1;
const char *s2;
unsigned 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 (c1 == '\0' || c1 != c2)
return c1 - c2;
} while (--n > 0);
return c1 - c2;
}
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