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/*
* Copyright (C) 2001 Thomas Roessler <roessler@does-not-exist.org>
*
* 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 of the License, 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., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
/*
* Versions of the string comparison functions which are
* locale-insensitive.
*/
#if HAVE_CONFIG_H
# include "config.h"
#endif
#include <stdio.h>
#include <stdlib.h>
#include "ascii.h"
inline int ascii_isupper (int c)
{
return (c >= 'A') && (c <= 'Z');
}
inline int ascii_islower (int c)
{
return (c >= 'a') && (c <= 'z');
}
inline int ascii_toupper (int c)
{
if (ascii_islower (c))
return c & ~32;
return c;
}
inline int ascii_tolower (int c)
{
if (ascii_isupper (c))
return c | 32;
return c;
}
int ascii_strcasecmp (const char *a, const char *b)
{
int i;
if (a == b)
return 0;
if (a == NULL && b)
return -1;
if (b == NULL && a)
return 1;
for (;; a++, b++)
{
if ((i = ascii_tolower (*a) - ascii_tolower (*b)))
return i;
/* test for NUL here rather that in the for loop in order to detect unqual
* length strings (see http://dev.mutt.org/trac/ticket/3601)
*/
if (!*a)
break;
}
return 0;
}
int ascii_strncasecmp (const char *a, const char *b, int n)
{
int i, j;
if (a == b)
return 0;
if (a == NULL && b)
return -1;
if (b == NULL && a)
return 1;
for (j = 0; (*a || *b) && j < n; a++, b++, j++)
{
if ((i = ascii_tolower (*a) - ascii_tolower (*b)))
return i;
}
return 0;
}
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