69 lines
2.0 KiB
C
69 lines
2.0 KiB
C
/* $NetBSD: strcasecmp.c,v 1.1.1.1 2003/01/26 00:43:15 wiz Exp $ */
|
|
|
|
/* strcasecmp.c -- case insensitive string comparator
|
|
Copyright (C) 1998, 1999 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 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 General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software Foundation,
|
|
Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
|
|
|
|
#if HAVE_CONFIG_H
|
|
# include <config.h>
|
|
#endif
|
|
|
|
#ifdef LENGTH_LIMIT
|
|
# define STRXCASECMP_FUNCTION strncasecmp
|
|
# define STRXCASECMP_DECLARE_N , size_t n
|
|
# define LENGTH_LIMIT_EXPR(Expr) Expr
|
|
#else
|
|
# define STRXCASECMP_FUNCTION strcasecmp
|
|
# define STRXCASECMP_DECLARE_N /* empty */
|
|
# define LENGTH_LIMIT_EXPR(Expr) 0
|
|
#endif
|
|
|
|
#include <sys/types.h>
|
|
#include <ctype.h>
|
|
|
|
#define TOLOWER(Ch) (isupper (Ch) ? tolower (Ch) : (Ch))
|
|
|
|
/* Compare {{no more than N characters 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. */
|
|
|
|
int
|
|
STRXCASECMP_FUNCTION (const char *s1, const char *s2 STRXCASECMP_DECLARE_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 || LENGTH_LIMIT_EXPR (n == 0))
|
|
return 0;
|
|
|
|
do
|
|
{
|
|
c1 = TOLOWER (*p1);
|
|
c2 = TOLOWER (*p2);
|
|
|
|
if (LENGTH_LIMIT_EXPR (--n == 0) || c1 == '\0')
|
|
break;
|
|
|
|
++p1;
|
|
++p2;
|
|
}
|
|
while (c1 == c2);
|
|
|
|
return c1 - c2;
|
|
}
|