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 20 /* Version 4 UUID (pseudo random numbers), RFC4122 4.4. */ 21 22 typedef struct { 23 union { 24 unsigned char data[16]; 25 struct { 26 /* Generated in BE endian, can be swapped with qemu_uuid_bswap. */ 27 uint32_t time_low; 28 uint16_t time_mid; 29 uint16_t time_high_and_version; 30 uint8_t clock_seq_and_reserved; 31 uint8_t clock_seq_low; 32 uint8_t node[6]; 33 } fields; 34 }; 35 } QemuUUID; 36 37 #define UUID_FMT "%02hhx%02hhx%02hhx%02hhx-" \ 38 "%02hhx%02hhx-%02hhx%02hhx-" \ 39 "%02hhx%02hhx-" \ 40 "%02hhx%02hhx%02hhx%02hhx%02hhx%02hhx" 41 42 #define UUID_FMT_LEN 36 43 44 #define UUID_NONE "00000000-0000-0000-0000-000000000000" 45 46 void qemu_uuid_generate(QemuUUID *out); 47 48 int qemu_uuid_is_null(const QemuUUID *uu); 49 50 int qemu_uuid_is_equal(const QemuUUID *lhv, const QemuUUID *rhv); 51 52 void qemu_uuid_unparse(const QemuUUID *uuid, char *out); 53 54 char *qemu_uuid_unparse_strdup(const QemuUUID *uuid); 55 56 int qemu_uuid_parse(const char *str, QemuUUID *uuid); 57 58 QemuUUID qemu_uuid_bswap(QemuUUID uuid); 59 60 #endif 61