rm_/lib/memcmp2.c

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2020-09-02 16:47:03 +08:00
/* Compare two memory areas with possibly different lengths.
Copyright (C) 2009-2020 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 3 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, see <https://www.gnu.org/licenses/>. */
#include <config.h>
/* Specification. */
#include "memcmp2.h"
#include <string.h>
int
memcmp2 (const char *s1, size_t n1, const char *s2, size_t n2)
{
int cmp = memcmp (s1, s2, n1 <= n2 ? n1 : n2);
if (cmp == 0)
{
if (n1 < n2)
cmp = -1;
else if (n1 > n2)
cmp = 1;
}
return cmp;
}