serial.c

来自「非常好的dns解析软件」· C语言 代码 · 共 60 行

/*
 * Copyright (C) 2004, 2005  Internet Systems Consortium, Inc. ("ISC")
 * Copyright (C) 1999-2001  Internet Software Consortium.
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
 * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 * PERFORMANCE OF THIS SOFTWARE.
 */

/* $Id: serial.c,v 1.8.18.2 2005/04/29 00:16:49 marka Exp $ */

/*! \file */

#include <config.h>

#include <isc/serial.h>

isc_boolean_t
isc_serial_lt(isc_uint32_t a, isc_uint32_t b) {
	/*
	 * Undefined => ISC_FALSE
	 */
	if (a == (b ^ 0x80000000U))
		return (ISC_FALSE);
	return (((isc_int32_t)(a - b) < 0) ? ISC_TRUE : ISC_FALSE);
}

isc_boolean_t
isc_serial_gt(isc_uint32_t a, isc_uint32_t b) {
	return (((isc_int32_t)(a - b) > 0) ? ISC_TRUE : ISC_FALSE);
}

isc_boolean_t
isc_serial_le(isc_uint32_t a, isc_uint32_t b) {
	return ((a == b) ? ISC_TRUE : isc_serial_lt(a, b));
}

isc_boolean_t
isc_serial_ge(isc_uint32_t a, isc_uint32_t b) {
	return ((a == b) ? ISC_TRUE : isc_serial_gt(a, b));
}

isc_boolean_t
isc_serial_eq(isc_uint32_t a, isc_uint32_t b) {
	return ((a == b) ? ISC_TRUE : ISC_FALSE);
}

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