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/*
* QEMU UUID functions
*
* Copyright 2016 Red Hat, Inc.
*
* Authors:
* Fam Zheng <famz@redhat.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
*/
#ifndef QEMU_UUID_H
#define QEMU_UUID_H
/* Version 4 UUID (pseudo random numbers), RFC4122 4.4. */
typedef struct {
union {
unsigned char data[16];
struct {
/* Generated in BE endian, can be swapped with qemu_uuid_bswap. */
uint32_t time_low;
uint16_t time_mid;
uint16_t time_high_and_version;
uint8_t clock_seq_and_reserved;
uint8_t clock_seq_low;
uint8_t node[6];
} fields;
};
} QemuUUID;
/**
* UUID_LE - converts the fields of UUID to little-endian array,
* each of parameters is the filed of UUID.
*
* @time_low: The low field of the timestamp
* @time_mid: The middle field of the timestamp
* @time_hi_and_version: The high field of the timestamp
* multiplexed with the version number
* @clock_seq_hi_and_reserved: The high field of the clock
* sequence multiplexed with the variant
* @clock_seq_low: The low field of the clock sequence
* @node0: The spatially unique node0 identifier
* @node1: The spatially unique node1 identifier
* @node2: The spatially unique node2 identifier
* @node3: The spatially unique node3 identifier
* @node4: The spatially unique node4 identifier
* @node5: The spatially unique node5 identifier
*/
#define UUID_LE(time_low, time_mid, time_hi_and_version, \
clock_seq_hi_and_reserved, clock_seq_low, node0, node1, node2, \
node3, node4, node5) \
{ (time_low) & 0xff, ((time_low) >> 8) & 0xff, ((time_low) >> 16) & 0xff, \
((time_low) >> 24) & 0xff, (time_mid) & 0xff, ((time_mid) >> 8) & 0xff, \
(time_hi_and_version) & 0xff, ((time_hi_and_version) >> 8) & 0xff, \
(clock_seq_hi_and_reserved), (clock_seq_low), (node0), (node1), (node2),\
(node3), (node4), (node5) }
#define UUID_FMT "%02hhx%02hhx%02hhx%02hhx-" \
"%02hhx%02hhx-%02hhx%02hhx-" \
"%02hhx%02hhx-" \
"%02hhx%02hhx%02hhx%02hhx%02hhx%02hhx"
#define UUID_FMT_LEN 36
#define UUID_NONE "00000000-0000-0000-0000-000000000000"
void qemu_uuid_generate(QemuUUID *out);
int qemu_uuid_is_null(const QemuUUID *uu);
int qemu_uuid_is_equal(const QemuUUID *lhv, const QemuUUID *rhv);
void qemu_uuid_unparse(const QemuUUID *uuid, char *out);
char *qemu_uuid_unparse_strdup(const QemuUUID *uuid);
int qemu_uuid_parse(const char *str, QemuUUID *uuid);
QemuUUID qemu_uuid_bswap(QemuUUID uuid);
#endif
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