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2 * uuid.h -- private header file for uuids
4 * Copyright (C) 1996, 1997 Theodore Ts'o.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, and the entire permission notice in its entirety,
12 * including the disclaimer of warranties.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. The name of the author may not be used to endorse or promote
17 * products derived from this software without specific prior
20 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
21 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ALL OF
23 * WHICH ARE HEREBY DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE
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25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
26 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
27 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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30 * USE OF THIS SOFTWARE, EVEN IF NOT ADVISED OF THE POSSIBILITY OF SUCH
34 #ifndef _UUID_UUID_PRIVATE_H
35 #define _UUID_UUID_PRIVATE_H
38 #include <sys/types.h>
42 #define LIBUUID_CLOCK_FILE "/var/lib/libuuid/clock.txt"
45 * Offset between 15-Oct-1582 and 1-Jan-70
47 #define TIME_OFFSET_HIGH 0x01B21DD2
48 #define TIME_OFFSET_LOW 0x13814000
51 * Note that RFC4122 defines UUID in more details:
53 * Field Data Type Octet Note
54 * -------------------------------------------------
55 * time_low unsigned 32 0-3 The low field of the
56 * bit integer timestamp
58 * time_mid unsigned 16 4-5 The middle field of the
59 * bit integer timestamp
61 * time_hi_and_version unsigned 16 6-7 The high field of the
62 * bit integer timestamp multiplexed
63 * with the version number
65 * clock_seq_hi_and_rese unsigned 8 8 The high field of the
66 * rved bit integer clock sequence
67 * multiplexed with the
70 * clock_seq_low unsigned 8 9 The low field of the
71 * bit integer clock sequence
73 * node unsigned 48 10-15 The spatially unique
74 * bit integer node identifier
76 * We have clock_seq_hi_and_reserved (8bit) and clock_seq_low (8bit)
77 * merged into clock_seq (16bit).
82 uint16_t time_hi_and_version
;
91 void uuid_pack(const struct uuid
*uu
, uuid_t ptr
);
92 void uuid_unpack(const uuid_t in
, struct uuid
*uu
);
94 #endif /* _UUID_UUID_PRIVATE_H */