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/* Compare at most N characters of two strings without taking care for
the case.
Copyright (C) 1992, 1996, 1997 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <string.h>
#include <ctype.h>
#ifndef weak_alias
# define __strncasecmp strncasecmp
# define TOLOWER(Ch) tolower (Ch)
#else
# ifdef USE_IN_EXTENDED_LOCALE_MODEL
# define __strncasecmp __strncasecmp_l
# define TOLOWER(Ch) __tolower_l ((Ch), loc)
# else
# define TOLOWER(Ch) tolower (Ch)
# endif
#endif
#ifdef USE_IN_EXTENDED_LOCALE_MODEL
# define LOCALE_PARAM , loc
# define LOCALE_PARAM_DECL __locale_t loc;
#else
# define LOCALE_PARAM
# define LOCALE_PARAM_DECL
#endif
/* Compare no more than N characters of 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. */
int
__strncasecmp (s1, s2, n LOCALE_PARAM)
const char *s1;
const char *s2;
size_t n;
LOCALE_PARAM_DECL
{
const unsigned char *p1 = (const unsigned char *) s1;
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;
}
#ifndef __strncasecmp
weak_alias (__strncasecmp, strncasecmp)
#endif
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