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