external/bsd/ntp/dist/lib/isc/serial.c

   1 /*      $NetBSD$        */
   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
  28 isc_boolean_t
  29 isc_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
  38 isc_boolean_t
  39 isc_serial_gt(isc_uint32_t a, isc_uint32_t b) {
  40         return (((isc_int32_t)(a - b) > 0) ? ISC_TRUE : ISC_FALSE);
  41 }
  42
  43 isc_boolean_t
  44 isc_serial_le(isc_uint32_t a, isc_uint32_t b) {
  45         return ((a == b) ? ISC_TRUE : isc_serial_lt(a, b));
  46 }
  47
  48 isc_boolean_t
  49 isc_serial_ge(isc_uint32_t a, isc_uint32_t b) {
  50         return ((a == b) ? ISC_TRUE : isc_serial_gt(a, b));
  51 }
  52
  53 isc_boolean_t
  54 isc_serial_eq(isc_uint32_t a, isc_uint32_t b) {
  55         return ((a == b) ? ISC_TRUE : ISC_FALSE);
  56 }
  57
  58 isc_boolean_t
  59 isc_serial_ne(isc_uint32_t a, isc_uint32_t b) {
  60         return ((a != b) ? ISC_TRUE : ISC_FALSE);
  61 }