1/***********************************************************************
2*                                                                      *
3*               This software is part of the ast package               *
4*          Copyright (c) 1985-2011 AT&T Intellectual Property          *
5*                      and is licensed under the                       *
6*                  Common Public License, Version 1.0                  *
7*                    by AT&T Intellectual Property                     *
8*                                                                      *
9*                A copy of the License is available at                 *
10*            http://www.opensource.org/licenses/cpl1.0.txt             *
11*         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
12*                                                                      *
13*              Information and Software Systems Research               *
14*                            AT&T Research                             *
15*                           Florham Park NJ                            *
16*                                                                      *
17*                 Glenn Fowler <gsf@research.att.com>                  *
18*                  David Korn <dgk@research.att.com>                   *
19*                   Phong Vo <kpv@research.att.com>                    *
20*                                                                      *
21***********************************************************************/
22#pragma prototyped
23
24#include <ast.h>
25
26#if _lib_memcmp
27
28NoN(memcmp)
29
30#else
31
32int
33memcmp(const void* ab1, const void* ab2, size_t n)
34{
35	register const unsigned char*	b1 = (const unsigned char*)ab1;
36	register const unsigned char*	b2 = (const unsigned char*)ab2;
37	register const unsigned char*	e = b1 + n;
38
39	while (b1 < e)
40		if (*b1++ != *b2++)
41			return(*--b1 - *--b2);
42	return(0);
43}
44
45#endif
46