55 lines
1.3 KiB
C
55 lines
1.3 KiB
C
|
/* Copyright (C) 2001-2019 Artifex Software, Inc.
|
||
|
|
All Rights Reserved.
|
||
|
|
|
||
|
|
This software is provided AS-IS with no warranty, either express or
|
||
|
|
implied.
|
||
|
|
|
||
|
|
This software is distributed under license and may not be copied,
|
||
|
|
modified or distributed except as expressly authorized under the terms
|
||
|
|
of the license contained in the file LICENSE in this distribution.
|
||
|
|
|
||
|
|
Refer to licensing information at http://www.artifex.com or contact
|
||
|
|
Artifex Software, Inc., 1305 Grant Avenue - Suite 200, Novato,
|
||
|
|
CA 94945, U.S.A., +1(415)492-9861, for further information.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/*
|
||
|
|
jbig2dec
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifdef HAVE_CONFIG_H
|
||
|
|
#include "config.h"
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#include <stddef.h>
|
||
|
|
|
||
|
|
/* replacement for broken memcmp() */
|
||
|
|
|
||
|
|
/*
|
||
|
|
* compares two byte strings 'a' and 'b', both assumed to be 'len' bytes long
|
||
|
|
* returns zero if the two strings are identical, otherwise returns -1 or 1
|
||
|
|
* depending on the relative magnitude of the first differing elements,
|
||
|
|
* considered as unsigned chars
|
||
|
|
*/
|
||
|
|
|
||
|
|
int
|
||
|
|
memcmp(const void *b1, const void *b2, size_t len)
|
||
|
|
{
|
||
|
|
unsigned char *a, *b;
|
||
|
|
size_t i;
|
||
|
|
|
||
|
|
a = (unsigned char *)b1;
|
||
|
|
b = (unsigned char *)b2;
|
||
|
|
for (i = 0; i < len; i++) {
|
||
|
|
if (*a != *b) {
|
||
|
|
/* strings differ */
|
||
|
|
return (*a < *b) ? -1 : 1;
|
||
|
|
}
|
||
|
|
a++;
|
||
|
|
b++;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* strings match */
|
||
|
|
return 0;
|
||
|
|
}
|