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