contrib/bind-9.2.4rc7/lib/isc/serial.c

   1 /*
   2  * Copyright (C) 2004  Internet Systems Consortium, Inc. ("ISC")
   3  * Copyright (C) 1999-2001  Internet Software Consortium.
   4  *
   5  * Permission to use, copy, modify, and 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 1.7.2.1 2004/03/09 06:11:51 marka Exp $ */
  19 #include <config.h>
  20
  21 #include <isc/serial.h>
  22
  23 isc_boolean_t
  24 isc_serial_lt(isc_uint32_t a, isc_uint32_t b) {
  25         /*
  26          * Undefined => ISC_FALSE
  27          */
  28         if (a == (b ^ 0x80000000U))
  29                 return (ISC_FALSE);
  30         return (((isc_int32_t)(a - b) < 0) ? ISC_TRUE : ISC_FALSE);
  31 }
  32
  33 isc_boolean_t
  34 isc_serial_gt(isc_uint32_t a, isc_uint32_t b) {
  35         return (((isc_int32_t)(a - b) > 0) ? ISC_TRUE : ISC_FALSE);
  36 }
  37
  38 isc_boolean_t
  39 isc_serial_le(isc_uint32_t a, isc_uint32_t b) {
  40         return ((a == b) ? ISC_TRUE : isc_serial_lt(a, b));
  41 }
  42
  43 isc_boolean_t
  44 isc_serial_ge(isc_uint32_t a, isc_uint32_t b) {
  45         return ((a == b) ? ISC_TRUE : isc_serial_gt(a, b));
  46 }
  47
  48 isc_boolean_t
  49 isc_serial_eq(isc_uint32_t a, isc_uint32_t b) {
  50         return ((a == b) ? ISC_TRUE : ISC_FALSE);
  51 }
  52
  53 isc_boolean_t
  54 isc_serial_ne(isc_uint32_t a, isc_uint32_t b) {
  55         return ((a != b) ? ISC_TRUE : ISC_FALSE);
  56 }