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