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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 02:42:50 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 02:42:50 +0000 |
commit | 8cb83eee5a58b1fad74c34094ce3afb9e430b5a4 (patch) | |
tree | a9b2e7baeca1be40eb734371e3c8b11b02294497 /libuuid/src/uuidP.h | |
parent | Initial commit. (diff) | |
download | util-linux-8cb83eee5a58b1fad74c34094ce3afb9e430b5a4.tar.xz util-linux-8cb83eee5a58b1fad74c34094ce3afb9e430b5a4.zip |
Adding upstream version 2.33.1.upstream/2.33.1upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'libuuid/src/uuidP.h')
-rw-r--r-- | libuuid/src/uuidP.h | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/libuuid/src/uuidP.h b/libuuid/src/uuidP.h new file mode 100644 index 0000000..78183de --- /dev/null +++ b/libuuid/src/uuidP.h @@ -0,0 +1,90 @@ +/* + * uuid.h -- private header file for uuids + * + * Copyright (C) 1996, 1997 Theodore Ts'o. + * + * %Begin-Header% + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, and the entire permission notice in its entirety, + * including the disclaimer of warranties. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote + * products derived from this software without specific prior + * written permission. + * + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ALL OF + * WHICH ARE HEREBY DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR + * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE + * USE OF THIS SOFTWARE, EVEN IF NOT ADVISED OF THE POSSIBILITY OF SUCH + * DAMAGE. + * %End-Header% + */ + +#include <inttypes.h> +#include <sys/types.h> + +#include "uuid.h" + +#define LIBUUID_CLOCK_FILE "/var/lib/libuuid/clock.txt" + +/* + * Offset between 15-Oct-1582 and 1-Jan-70 + */ +#define TIME_OFFSET_HIGH 0x01B21DD2 +#define TIME_OFFSET_LOW 0x13814000 + +/* + * Note that RFC4122 defines UUID in more details: + * + * Field Data Type Octet Note + * ------------------------------------------------- + * time_low unsigned 32 0-3 The low field of the + * bit integer timestamp + * + * time_mid unsigned 16 4-5 The middle field of the + * bit integer timestamp + * + * time_hi_and_version unsigned 16 6-7 The high field of the + * bit integer timestamp multiplexed + * with the version number + * + * clock_seq_hi_and_rese unsigned 8 8 The high field of the + * rved bit integer clock sequence + * multiplexed with the + * variant + * + * clock_seq_low unsigned 8 9 The low field of the + * bit integer clock sequence + * + * node unsigned 48 10-15 The spatially unique + * bit integer node identifier + * + * We have clock_seq_hi_and_reserved (8bit) and clock_seq_low (8bit) + * merged into clock_seq (16bit). + */ +struct uuid { + uint32_t time_low; + uint16_t time_mid; + uint16_t time_hi_and_version; + uint16_t clock_seq; + uint8_t node[6]; +}; + + +/* + * prototypes + */ +void uuid_pack(const struct uuid *uu, uuid_t ptr); +void uuid_unpack(const uuid_t in, struct uuid *uu); |