bind/lib/isc/serial.c

/*
 * Copyright (C) 1999, 2000  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 INTERNET SOFTWARE CONSORTIUM
 * DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL
 * INTERNET SOFTWARE CONSORTIUM 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 1.5 2000/07/27 09:51:11 tale Exp $ */
#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);
}