mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-20 11:11:24 +00:00
133 lines
3.9 KiB
C
133 lines
3.9 KiB
C
/*-
|
|
* Copyright (c) 2015 M. Warner Losh
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
/*
|
|
* Note: some comments taken from lib/libc/uuid/uuid_from_string.c
|
|
* Copyright (c) 2002 Marcel Moolenaar
|
|
* Copyright (c) 2002 Hiten Mahesh Pandya
|
|
*/
|
|
|
|
|
|
#include <stand.h>
|
|
#include <uuid.h>
|
|
|
|
static int
|
|
hex2int(int ch)
|
|
{
|
|
if (ch >= '0' && ch <= '9')
|
|
return ch - '0';
|
|
if (ch >= 'a' && ch <= 'f')
|
|
return 10 + ch - 'a';
|
|
if (ch >= 'A' && ch <= 'F')
|
|
return 10 + ch - 'A';
|
|
return 16;
|
|
}
|
|
|
|
static uint32_t
|
|
fromhex(const char *s, int len, int *ok)
|
|
{
|
|
uint32_t v;
|
|
int i, h;
|
|
|
|
if (!*ok)
|
|
return 0;
|
|
v = 0;
|
|
for (i = 0; i < len; i++) {
|
|
h = hex2int(s[i]);
|
|
if (h == 16) {
|
|
*ok = 0;
|
|
return v;
|
|
}
|
|
v = (v << 4) | h;
|
|
}
|
|
return v;
|
|
}
|
|
|
|
/*
|
|
* uuid_from_string() - convert a string representation of an UUID into
|
|
* a binary representation.
|
|
* See also:
|
|
* http://www.opengroup.org/onlinepubs/009629399/uuid_from_string.htm
|
|
*
|
|
* NOTE: The sequence field is in big-endian, while the time fields are in
|
|
* native byte order.
|
|
*
|
|
* 01234567-89ab-cdef-0123-456789abcdef
|
|
* 000000000011111111112222222222333333
|
|
* 012345678901234567890123456789012345
|
|
* - - - -
|
|
* hhhhhhhh-hhhh-hhhh-bbbb-bbbbbbbbbbbb
|
|
*
|
|
*/
|
|
void
|
|
uuid_from_string(const char *s, uuid_t *u, uint32_t *status)
|
|
{
|
|
int ok = 1;
|
|
int n;
|
|
|
|
if (s == NULL || *s == '\0') {
|
|
uuid_create_nil(u, status);
|
|
return;
|
|
}
|
|
|
|
if (status != NULL)
|
|
*status = uuid_s_invalid_string_uuid;
|
|
if (strlen(s) != 36)
|
|
return;
|
|
/* Only support new format, check for all the right dashes */
|
|
if (s[8] != '-' || s[13] != '-' || s[18] != '-' || s[23] != '-')
|
|
return;
|
|
/* native byte order */
|
|
u->time_low = fromhex(s , 8, &ok);
|
|
u->time_mid = fromhex(s + 9, 4, &ok);
|
|
u->time_hi_and_version = fromhex(s + 14, 4, &ok);
|
|
/* Big endian, but presented as a whole number so decode as such */
|
|
u->clock_seq_hi_and_reserved = fromhex(s + 19, 2, &ok);
|
|
u->clock_seq_low = fromhex(s + 21, 2, &ok);
|
|
u->node[0] = fromhex(s + 24, 2, &ok);
|
|
u->node[1] = fromhex(s + 26, 2, &ok);
|
|
u->node[2] = fromhex(s + 28, 2, &ok);
|
|
u->node[3] = fromhex(s + 30, 2, &ok);
|
|
u->node[4] = fromhex(s + 32, 2, &ok);
|
|
u->node[5] = fromhex(s + 34, 2, &ok);
|
|
if (!ok)
|
|
return;
|
|
|
|
/* We have a successful scan. Check semantics... */
|
|
n = u->clock_seq_hi_and_reserved;
|
|
if ((n & 0x80) != 0x00 && /* variant 0? */
|
|
(n & 0xc0) != 0x80 && /* variant 1? */
|
|
(n & 0xe0) != 0xc0) { /* variant 2? */
|
|
if (status != NULL)
|
|
*status = uuid_s_bad_version;
|
|
} else {
|
|
if (status != NULL)
|
|
*status = uuid_s_ok;
|
|
}
|
|
}
|