1106184Smarcel/*- 2106184Smarcel * Copyright (c) 2002 Marcel Moolenaar 3106184Smarcel * Copyright (c) 2002 Hiten Mahesh Pandya 4106184Smarcel * All rights reserved. 5106184Smarcel * 6106184Smarcel * Redistribution and use in source and binary forms, with or without 7106184Smarcel * modification, are permitted provided that the following conditions 8106184Smarcel * are met: 9106184Smarcel * 1. Redistributions of source code must retain the above copyright 10106184Smarcel * notice, this list of conditions and the following disclaimer. 11106184Smarcel * 2. Redistributions in binary form must reproduce the above copyright 12106184Smarcel * notice, this list of conditions and the following disclaimer in the 13106184Smarcel * documentation and/or other materials provided with the distribution. 14106184Smarcel * 15106184Smarcel * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16106184Smarcel * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17106184Smarcel * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18106184Smarcel * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19106184Smarcel * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20106184Smarcel * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21106184Smarcel * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22106184Smarcel * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23106184Smarcel * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24106184Smarcel * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25106184Smarcel * SUCH DAMAGE. 26106184Smarcel * 27106184Smarcel * $FreeBSD: releng/11.0/lib/libc/uuid/uuid_from_string.c 118670 2003-08-08 19:18:43Z marcel $ 28106184Smarcel */ 29106184Smarcel 30106184Smarcel#include <stdio.h> 31106184Smarcel#include <string.h> 32106184Smarcel#include <uuid.h> 33106184Smarcel 34106184Smarcel/* 35106184Smarcel * uuid_from_string() - convert a string representation of an UUID into 36106184Smarcel * a binary representation. 37106184Smarcel * See also: 38106184Smarcel * http://www.opengroup.org/onlinepubs/009629399/uuid_from_string.htm 39106184Smarcel * 40106184Smarcel * NOTE: The sequence field is in big-endian, while the time fields are in 41106184Smarcel * native byte order. 42106184Smarcel */ 43106184Smarcelvoid 44106184Smarceluuid_from_string(const char *s, uuid_t *u, uint32_t *status) 45106184Smarcel{ 46106184Smarcel int n; 47106184Smarcel 48106184Smarcel /* Short-circuit 2 special cases: NULL pointer and empty string. */ 49106184Smarcel if (s == NULL || *s == '\0') { 50106184Smarcel uuid_create_nil(u, status); 51106184Smarcel return; 52106184Smarcel } 53106184Smarcel 54106184Smarcel /* Assume the worst. */ 55106184Smarcel if (status != NULL) 56106184Smarcel *status = uuid_s_invalid_string_uuid; 57106184Smarcel 58106184Smarcel /* The UUID string representation has a fixed length. */ 59106184Smarcel if (strlen(s) != 36) 60106184Smarcel return; 61106184Smarcel 62106184Smarcel /* 63106184Smarcel * We only work with "new" UUIDs. New UUIDs have the form: 64106184Smarcel * 01234567-89ab-cdef-0123-456789abcdef 65106184Smarcel * The so called "old" UUIDs, which we don't support, have the form: 66106184Smarcel * 0123456789ab.cd.ef.01.23.45.67.89.ab 67106184Smarcel */ 68106184Smarcel if (s[8] != '-') 69106184Smarcel return; 70106184Smarcel 71106184Smarcel n = sscanf(s, 72106184Smarcel "%8x-%4hx-%4hx-%2hhx%2hhx-%2hhx%2hhx%2hhx%2hhx%2hhx%2hhx", 73106184Smarcel &u->time_low, &u->time_mid, &u->time_hi_and_version, 74106184Smarcel &u->clock_seq_hi_and_reserved, &u->clock_seq_low, &u->node[0], 75106184Smarcel &u->node[1], &u->node[2], &u->node[3], &u->node[4], &u->node[5]); 76106184Smarcel 77106184Smarcel /* Make sure we have all conversions. */ 78106184Smarcel if (n != 11) 79106184Smarcel return; 80106184Smarcel 81106184Smarcel /* We have a successful scan. Check semantics... */ 82106184Smarcel n = u->clock_seq_hi_and_reserved; 83106184Smarcel if ((n & 0x80) != 0x00 && /* variant 0? */ 84106184Smarcel (n & 0xc0) != 0x80 && /* variant 1? */ 85106184Smarcel (n & 0xe0) != 0xc0) { /* variant 2? */ 86106184Smarcel if (status != NULL) 87106184Smarcel *status = uuid_s_bad_version; 88106184Smarcel } else { 89106184Smarcel if (status != NULL) 90106184Smarcel *status = uuid_s_ok; 91106184Smarcel } 92106184Smarcel} 93