1 /* $NetBSD: region.c,v 1.4 2014/12/10 04:37:59 christos Exp $ */
2
3 /*
4 * Copyright (C) 2004, 2005, 2007 Internet Systems Consortium, Inc. ("ISC")
5 * Copyright (C) 2002 Internet Software Consortium.
6 *
7 * Permission to use, copy, modify, and/or distribute this software for any
8 * purpose with or without fee is hereby granted, provided that the above
9 * copyright notice and this permission notice appear in all copies.
10 *
11 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
12 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
13 * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
14 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
15 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
16 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
17 * PERFORMANCE OF THIS SOFTWARE.
18 */
19
20 /* Id: region.c,v 1.7 2007/06/19 23:47:17 tbox Exp */
21
22 /*! \file */
23
24 #include <config.h>
25
26 #include <stdlib.h>
27 #include <string.h>
28
29 #include <isc/region.h>
30 #include <isc/util.h>
31
32 int
isc_region_compare(isc_region_t * r1,isc_region_t * r2)33 isc_region_compare(isc_region_t *r1, isc_region_t *r2) {
34 unsigned int l;
35 int result;
36
37 REQUIRE(r1 != NULL);
38 REQUIRE(r2 != NULL);
39
40 l = (r1->length < r2->length) ? r1->length : r2->length;
41
42 if ((result = memcmp(r1->base, r2->base, l)) != 0)
43 return ((result < 0) ? -1 : 1);
44 else
45 return ((r1->length == r2->length) ? 0 :
46 (r1->length < r2->length) ? -1 : 1);
47 }
48