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