1/*	$NetBSD: serial.c,v 1.6 2020/05/25 20:47:20 christos Exp $	*/
2
3/*
4 * Copyright (C) 2004, 2005, 2007  Internet Systems Consortium, Inc. ("ISC")
5 * Copyright (C) 1999-2001  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: serial.c,v 1.12 2007/06/19 23:47:17 tbox Exp  */
21
22/*! \file */
23
24#include <config.h>
25
26#include <isc/serial.h>
27
28isc_boolean_t
29isc_serial_lt(isc_uint32_t a, isc_uint32_t b) {
30	/*
31	 * Undefined => ISC_FALSE
32	 */
33	if (a == (b ^ 0x80000000U))
34		return (ISC_FALSE);
35	return (((isc_int32_t)(a - b) < 0) ? ISC_TRUE : ISC_FALSE);
36}
37
38isc_boolean_t
39isc_serial_gt(isc_uint32_t a, isc_uint32_t b) {
40	return (((isc_int32_t)(a - b) > 0) ? ISC_TRUE : ISC_FALSE);
41}
42
43isc_boolean_t
44isc_serial_le(isc_uint32_t a, isc_uint32_t b) {
45	return ((a == b) ? ISC_TRUE : isc_serial_lt(a, b));
46}
47
48isc_boolean_t
49isc_serial_ge(isc_uint32_t a, isc_uint32_t b) {
50	return ((a == b) ? ISC_TRUE : isc_serial_gt(a, b));
51}
52
53isc_boolean_t
54isc_serial_eq(isc_uint32_t a, isc_uint32_t b) {
55	return ((a == b) ? ISC_TRUE : ISC_FALSE);
56}
57
58isc_boolean_t
59isc_serial_ne(isc_uint32_t a, isc_uint32_t b) {
60	return ((a != b) ? ISC_TRUE : ISC_FALSE);
61}
62