| Denis Vlasenko | c4f623e | 2006-12-26 01:30:59 +0000 | [diff] [blame] | 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 | |
| 43 | int 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 | } |