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📄 abort.c(1.42 KB)
📁 amd64
📄 arp.c(7.51 KB)
📄 assert.c(1.71 KB)
📄 bcd.c(1.48 KB)
📄 bootp.c(19.71 KB)
📄 bootp.h(4.58 KB)
📄 bootparam.c(9.78 KB)
📄 bootparam.h(180 B)
📄 bzipfs.c(9.92 KB)
📄 cd9660.c(15.37 KB)
📄 cd9660read.c(9.08 KB)
📄 close.c(3.37 KB)
📄 closeall.c(3 KB)
📄 crc32_libkern.c(58 B)
📄 dev.c(1.92 KB)
📄 dosfs.c(22.02 KB)
📄 dosfs.h(4.68 KB)
📄 environment.c(5.3 KB)
📄 ether.c(4.02 KB)
📄 ext2fs.c(23.7 KB)
📄 fstat.c(2.07 KB)
📁 geli
📄 getopt.c(3.46 KB)
📄 gets.c(2.88 KB)
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📄 gpt.c(10.85 KB)
📄 gpt.h(1.62 KB)
📄 gzipfs.c(8.95 KB)
📄 hexdump.c(2.36 KB)
📁 i386
📄 in_cksum.c(2.94 KB)
📄 inet_ntoa.c(2.35 KB)
📄 ioctl.c(3.19 KB)
📄 iodesc.h(2.26 KB)
📄 ip.c(10.5 KB)
📄 libsa.3(14.32 KB)
📄 lseek.c(4.58 KB)
📁 mips
📄 net.c(6.84 KB)
📄 net.h(4.23 KB)
📄 netif.c(7.26 KB)
📄 netif.h(1.49 KB)
📄 nfs.c(18.2 KB)
📄 nfsv2.h(3.67 KB)
📄 nullfs.c(3.44 KB)
📄 open.c(4.43 KB)
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📄 panic.c(2.26 KB)
📄 pkgfs.c(17.54 KB)
📁 powerpc
📄 printf.c(11.96 KB)
📄 random.c(2.3 KB)
📄 rarp.c(5.42 KB)
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📄 readdir.c(1.8 KB)
📄 rpc.c(10.08 KB)
📄 rpc.h(2.61 KB)
📄 rpcv2.h(2.86 KB)
📄 saioctl.h(2.59 KB)
📄 sbrk.c(2.06 KB)
📄 smbios.c(13.81 KB)
📄 smbios.h(1.48 KB)
📄 splitfs.c(7.59 KB)
📄 stand.h(15.61 KB)
📄 stat.c(1.89 KB)
📄 strcasecmp.c(2.36 KB)
📄 strdup.c(2.02 KB)
📄 strerror.c(3.04 KB)
📄 tftp.c(17.16 KB)
📄 tftp.h(1.76 KB)
📄 time.c(1.49 KB)
📄 twiddle.c(2.4 KB)
📄 udp.c(4.62 KB)
📄 ufs.c(19.98 KB)
📄 ufsread.c(8.73 KB)
📄 uuid_from_string.c(3.88 KB)
📄 uuid_to_string.c(3.25 KB)
📄 write.c(3.44 KB)
📁 x86
📄 xlocale_private.h(1.52 KB)
📄 zalloc.c(9.15 KB)
📄 zalloc_defs.h(2.57 KB)
📄 zalloc_malloc.c(5.3 KB)
📄 zalloc_mem.h(1.84 KB)
📄 zalloc_protos.h(1.79 KB)
📁 zfs

Editing: uuid_from_string.c

/*-
 * Copyright (c) 2015 M. Warner Losh <imp@FreeBSD.org>
 *
 * 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;
	}
}

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Editing: uuid_from_string.c

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