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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 "config.h"
38 #include "uuidP.h"
39 #include <string.h>
40 
41 #define UUCMP(u1,u2) if (u1 != u2) return((u1 < u2) ? -1 : 1);
42 
uuid_compare(const uuid_t uu1,const uuid_t uu2)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 }
56 
57