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/* Copyright (c) 2000 TXT DataKonsult Ab & Monty Program Ab
Copyright (c) 2009-2011, Monty Program Ab
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must the following disclaimer in
the documentation and/or other materials provided with the
distribution.
THIS SOFTWARE IS PROVIDED BY <COPYRIGHT HOLDER> ``AS IS'' AND ANY
EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> OR
CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE.
*/
/* memcmp(lhs, rhs, len)
compares the two memory areas lhs[0..len-1] ?? rhs[0..len-1]. It
returns an integer less than, equal to, or greater than 0 according
as lhs[-] is lexicographically less than, equal to, or greater than
rhs[-]. Note that this is not at all the same as bcmp, which tells
you *where* the difference is but not what.
Note: suppose we have int x, y; then memcmp(&x, &y, sizeof x) need
not bear any relation to x-y. This is because byte order is machine
dependent, and also, some machines have integer representations that
are shorter than a machine word and two equal integers might have
different values in the spare bits. On a ones complement machine,
-0 == 0, but the bit patterns are different.
*/
#include "strings.h"
#if !defined(HAVE_MEMCPY)
int memcmp(lhs, rhs, len)
register char *lhs, *rhs;
register int len;
{
while (--len >= 0)
if (*lhs++ != *rhs++) return (uchar) lhs[-1] - (uchar) rhs[-1];
return 0;
}
#endif
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