56 lines
2.1 KiB
C
56 lines
2.1 KiB
C
/*
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* compare.c --- compare whether or not two UUIDs are the same
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*
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* Returns 0 if the two UUIDs are different, and 1 if they are the same.
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*
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* Copyright (C) 1996, 1997 Theodore Ts'o.
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*
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* %Begin-Header%
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, and the entire permission notice in its entirety,
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* including the disclaimer of warranties.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote
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* products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ALL OF
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* WHICH ARE HEREBY DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
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* USE OF THIS SOFTWARE, EVEN IF NOT ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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* %End-Header%
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*/
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#include "uuidP.h"
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#include <string.h>
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#define UUCMP(u1,u2) if (u1 != u2) return((u1 < u2) ? -1 : 1);
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int uuid_compare(const uuid_t uu1, const uuid_t uu2)
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{
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struct uuid uuid1, uuid2;
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uuid_unpack(uu1, &uuid1);
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uuid_unpack(uu2, &uuid2);
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UUCMP(uuid1.time_low, uuid2.time_low);
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UUCMP(uuid1.time_mid, uuid2.time_mid);
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UUCMP(uuid1.time_hi_and_version, uuid2.time_hi_and_version);
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UUCMP(uuid1.clock_seq, uuid2.clock_seq);
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return memcmp(uuid1.node, uuid2.node, 6);
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}
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