1 /* vi: set sw=4 ts=4: */
3 * compare.c --- compare whether or not two UUID's are the same
5 * Returns 0 if the two UUID's are different, and 1 if they are the same.
7 * Copyright (C) 1996, 1997 Theodore Ts'o.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
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
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
41 #define UUCMP(u1,u2) if (u1 != u2) return (u1 < u2) ? -1 : 1;
43 int uuid_compare(const uuid_t uu1
, const uuid_t uu2
)
45 struct uuid uuid1
, uuid2
;
47 uuid_unpack(uu1
, &uuid1
);
48 uuid_unpack(uu2
, &uuid2
);
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);