source: MondoRescue/branches/stable/mindi-busybox/e2fsprogs/e2p/uuid.c @ 821

Last change on this file since 821 was 821, checked in by Bruno Cornec, 13 years ago

Addition of busybox 1.2.1 as a mindi-busybox new package
This should avoid delivering binary files in mindi not built there (Fedora and Debian are quite serious about that)

File size: 1.4 KB
Line 
1/*
2 * uuid.c -- utility routines for manipulating UUID's.
3 */
4
5#include <stdio.h>
6#include <string.h>
7#include "../ext2fs/ext2_types.h"
8
9#include "e2p.h"
10
11struct uuid {
12    __u32   time_low;
13    __u16   time_mid;
14    __u16   time_hi_and_version;
15    __u16   clock_seq;
16    __u8    node[6];
17};
18
19/* Returns 1 if the uuid is the NULL uuid */
20int e2p_is_null_uuid(void *uu)
21{
22    __u8    *cp;
23    int i;
24
25    for (i=0, cp = uu; i < 16; i++)
26        if (*cp)
27            return 0;
28    return 1;
29}
30
31static void e2p_unpack_uuid(void *in, struct uuid *uu)
32{
33    __u8    *ptr = in;
34    __u32   tmp;
35
36    tmp = *ptr++;
37    tmp = (tmp << 8) | *ptr++;
38    tmp = (tmp << 8) | *ptr++;
39    tmp = (tmp << 8) | *ptr++;
40    uu->time_low = tmp;
41
42    tmp = *ptr++;
43    tmp = (tmp << 8) | *ptr++;
44    uu->time_mid = tmp;
45
46    tmp = *ptr++;
47    tmp = (tmp << 8) | *ptr++;
48    uu->time_hi_and_version = tmp;
49
50    tmp = *ptr++;
51    tmp = (tmp << 8) | *ptr++;
52    uu->clock_seq = tmp;
53
54    memcpy(uu->node, ptr, 6);
55}
56
57void e2p_uuid_to_str(void *uu, char *out)
58{
59    struct uuid uuid;
60
61    e2p_unpack_uuid(uu, &uuid);
62    sprintf(out,
63        "%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x",
64        uuid.time_low, uuid.time_mid, uuid.time_hi_and_version,
65        uuid.clock_seq >> 8, uuid.clock_seq & 0xFF,
66        uuid.node[0], uuid.node[1], uuid.node[2],
67        uuid.node[3], uuid.node[4], uuid.node[5]);
68}
69
70const char *e2p_uuid2str(void *uu)
71{
72    static char buf[80];
73    if (e2p_is_null_uuid(uu))
74        return "<none>";
75    e2p_uuid_to_str(uu, buf);
76    return buf;
77}
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