contrib/bind-9.5.2/lib/isc/serial.c

   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
  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
  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
  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
  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
  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
  57 isc_serial_ne(isc_uint32_t a, isc_uint32_t b) {
  58         return ((a != b) ? ISC_TRUE : ISC_FALSE);
  59 }