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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 13:14:44 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 13:14:44 +0000
commit30ff6afe596eddafacf22b1a5b2d1a3d6254ea15 (patch)
tree9b788335f92174baf7ee18f03ca8330b8c19ce2b /libuuid/src/uuidP.h
parentInitial commit. (diff)
downloadutil-linux-30ff6afe596eddafacf22b1a5b2d1a3d6254ea15.tar.xz
util-linux-30ff6afe596eddafacf22b1a5b2d1a3d6254ea15.zip
Adding upstream version 2.36.1.upstream/2.36.1upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'libuuid/src/uuidP.h')
-rw-r--r--libuuid/src/uuidP.h94
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diff --git a/libuuid/src/uuidP.h b/libuuid/src/uuidP.h
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+/*
+ * 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%
+ */
+#ifndef _UUID_UUID_PRIVATE_H
+#define _UUID_UUID_PRIVATE_H
+
+#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);
+
+#endif /* _UUID_UUID_PRIVATE_H */