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journal: add preliminary incomplete implementation
[thirdparty/systemd.git] / src / sd-id128.h
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1/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
2
3#ifndef fooid128hfoo
4#define fooid128hfoo
5
6/***
7 This file is part of systemd.
8
9 Copyright 2011 Lennart Poettering
10
11 systemd is free software; you can redistribute it and/or modify it
12 under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 2 of the License, or
14 (at your option) any later version.
15
16 systemd is distributed in the hope that it will be useful, but
17 WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 General Public License for more details.
20
21 You should have received a copy of the GNU General Public License
22 along with systemd; If not, see <http://www.gnu.org/licenses/>.
23***/
24
25#include <inttypes.h>
26#include <stdbool.h>
27#include <string.h>
28
29typedef union sd_id128 sd_id128_t;
30
31union sd_id128 {
32 uint8_t bytes[16];
33 uint64_t qwords[2];
34};
35
36char *sd_id128_to_string(sd_id128_t id, char s[33]);
37
38int sd_id128_from_string(const char s[33], sd_id128_t *ret);
39
40int sd_id128_randomize(sd_id128_t *ret);
41
42sd_id128_t sd_id128_make_v4_uuid(sd_id128_t id);
43
44int sd_id128_get_machine(sd_id128_t *ret);
45
46int sd_id128_get_boot(sd_id128_t *ret);
47
48#define SD_ID128_MAKE(v0, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15) \
49 ((sd_id128_t) { .bytes = { 0x##v0, 0x##v1, 0x##v2, 0x##v3, 0x##v4, 0x##v5, 0x##v6, 0x##v7, \
50 0x##v8, 0x##v9, 0x##v10, 0x##v11, 0x##v12, 0x##v13, 0x##v14, 0x##v15 }})
51
52static inline bool sd_id128_equal(sd_id128_t a, sd_id128_t b) {
53 return memcmp(&a, &b, 16) == 0;
54}
55
56#endif