include/qemu/uuid.h

   1 /*
   2  *  QEMU UUID functions
   3  *
   4  *  Copyright 2016 Red Hat, Inc.
   5  *
   6  *  Authors:
   7  *   Fam Zheng <famz@redhat.com>
   8  *
   9  * This program is free software; you can redistribute it and/or modify it
  10  * under the terms of the GNU General Public License as published by the Free
  11  * Software Foundation; either version 2 of the License, or (at your option)
  12  * any later version.
  13  *
  14  */
  15
  16 #ifndef QEMU_UUID_H
  17 #define QEMU_UUID_H
  18
  19 #include "qemu-common.h"
  20
  21 /* Version 4 UUID (pseudo random numbers), RFC4122 4.4. */
  22
  23 typedef struct {
  24     union {
  25         unsigned char data[16];
  26         struct {
  27             /* Generated in BE endian, can be swapped with qemu_uuid_bswap. */
  28             uint32_t time_low;
  29             uint16_t time_mid;
  30             uint16_t time_high_and_version;
  31             uint8_t  clock_seq_and_reserved;
  32             uint8_t  clock_seq_low;
  33             uint8_t  node[6];
  34         } fields;
  35     };
  36 } QemuUUID;
  37
  38 #define UUID_FMT "%02hhx%02hhx%02hhx%02hhx-" \
  39                  "%02hhx%02hhx-%02hhx%02hhx-" \
  40                  "%02hhx%02hhx-" \
  41                  "%02hhx%02hhx%02hhx%02hhx%02hhx%02hhx"
  42
  43 #define UUID_FMT_LEN 36
  44
  45 #define UUID_NONE "00000000-0000-0000-0000-000000000000"
  46
  47 void qemu_uuid_generate(QemuUUID *out);
  48
  49 int qemu_uuid_is_null(const QemuUUID *uu);
  50
  51 int qemu_uuid_is_equal(const QemuUUID *lhv, const QemuUUID *rhv);
  52
  53 void qemu_uuid_unparse(const QemuUUID *uuid, char *out);
  54
  55 char *qemu_uuid_unparse_strdup(const QemuUUID *uuid);
  56
  57 int qemu_uuid_parse(const char *str, QemuUUID *uuid);
  58
  59 void qemu_uuid_bswap(QemuUUID *uuid);
  60
  61 #endif