region.c revision 290001 
1/*
2 * Copyright (C) 2004, 2005, 2007  Internet Systems Consortium, Inc. ("ISC")
3 * Copyright (C) 2002  Internet Software Consortium.
4 *
5 * Permission to use, copy, modify, and/or distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
10 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
11 * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
12 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
13 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
14 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
15 * PERFORMANCE OF THIS SOFTWARE.
16 */
17
18/* $Id: region.c,v 1.7 2007/06/19 23:47:17 tbox Exp $ */
19
20/*! \file */
21
22#include <config.h>
23
24#include <stdlib.h>
25#include <string.h>
26
27#include <isc/region.h>
28#include <isc/util.h>
29
30int
31isc_region_compare(isc_region_t *r1, isc_region_t *r2) {
32	unsigned int l;
33	int result;
34
35	REQUIRE(r1 != NULL);
36	REQUIRE(r2 != NULL);
37
38	l = (r1->length < r2->length) ? r1->length : r2->length;
39
40	if ((result = memcmp(r1->base, r2->base, l)) != 0)
41		return ((result < 0) ? -1 : 1);
42	else
43		return ((r1->length == r2->length) ? 0 :
44			(r1->length < r2->length) ? -1 : 1);
45}
46