1/* vi: set sw=4 ts=4: */ 2/* 3 * compare.c --- compare whether or not two UUID's are the same 4 * 5 * Returns 0 if the two UUID's are different, and 1 if they are the same. 6 * 7 * Copyright (C) 1996, 1997 Theodore Ts'o. 8 * 9 * %Begin-Header% 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, and the entire permission notice in its entirety, 15 * including the disclaimer of warranties. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. The name of the author may not be used to endorse or promote 20 * products derived from this software without specific prior 21 * written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ALL OF 26 * WHICH ARE HEREBY DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE 27 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 29 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 32 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE 33 * USE OF THIS SOFTWARE, EVEN IF NOT ADVISED OF THE POSSIBILITY OF SUCH 34 * DAMAGE. 35 * %End-Header% 36 */ 37 38#include "uuidP.h" 39#include <string.h> 40 41#define UUCMP(u1,u2) if (u1 != u2) return (u1 < u2) ? -1 : 1; 42 43int uuid_compare(const uuid_t uu1, const uuid_t uu2) 44{ 45 struct uuid uuid1, uuid2; 46 47 uuid_unpack(uu1, &uuid1); 48 uuid_unpack(uu2, &uuid2); 49 50 UUCMP(uuid1.time_low, uuid2.time_low); 51 UUCMP(uuid1.time_mid, uuid2.time_mid); 52 UUCMP(uuid1.time_hi_and_version, uuid2.time_hi_and_version); 53 UUCMP(uuid1.clock_seq, uuid2.clock_seq); 54 return memcmp(uuid1.node, uuid2.node, 6); 55} 56