1/* $NetBSD$ */ 2 3/*- 4 * Copyright (c) 2002 Marcel Moolenaar 5 * Copyright (c) 2002 Hiten Mahesh Pandya 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD: src/lib/libc/uuid/uuid_from_string.c,v 1.2 2003/08/08 19:18:43 marcel Exp $ 30 */ 31 32#include <sys/cdefs.h> 33#if defined(LIBC_SCCS) && !defined(lint) 34__RCSID("$NetBSD$"); 35#endif 36 37#include "namespace.h" 38 39#include <stdio.h> 40#include <string.h> 41#include <uuid.h> 42 43/* 44 * uuid_from_string() - convert a string representation of an UUID into 45 * a binary representation. 46 * See also: 47 * http://www.opengroup.org/onlinepubs/009629399/uuid_from_string.htm 48 * 49 * NOTE: The sequence field is in big-endian, while the time fields are in 50 * native byte order. 51 */ 52void 53uuid_from_string(const char *s, uuid_t *u, uint32_t *status) 54{ 55 int n; 56 57 /* Short-circuit 2 special cases: NULL pointer and empty string. */ 58 if (s == NULL || *s == '\0') { 59 uuid_create_nil(u, status); 60 return; 61 } 62 63 /* Assume the worst. */ 64 if (status != NULL) 65 *status = uuid_s_invalid_string_uuid; 66 67 /* The UUID string representation has a fixed length. */ 68 if (strlen(s) != 36) 69 return; 70 71 /* 72 * We only work with "new" UUIDs. New UUIDs have the form: 73 * 01234567-89ab-cdef-0123-456789abcdef 74 * The so called "old" UUIDs, which we don't support, have the form: 75 * 0123456789ab.cd.ef.01.23.45.67.89.ab 76 */ 77 if (s[8] != '-') 78 return; 79 80 n = sscanf(s, 81 "%8x-%4hx-%4hx-%2hhx%2hhx-%2hhx%2hhx%2hhx%2hhx%2hhx%2hhx", 82 &u->time_low, &u->time_mid, &u->time_hi_and_version, 83 &u->clock_seq_hi_and_reserved, &u->clock_seq_low, &u->node[0], 84 &u->node[1], &u->node[2], &u->node[3], &u->node[4], &u->node[5]); 85 86 /* Make sure we have all conversions. */ 87 if (n != 11) 88 return; 89 90 /* We have a successful scan. Check semantics... */ 91 n = u->clock_seq_hi_and_reserved; 92 if ((n & 0x80) != 0x00 && /* variant 0? */ 93 (n & 0xc0) != 0x80 && /* variant 1? */ 94 (n & 0xe0) != 0xc0) { /* variant 2? */ 95 if (status != NULL) 96 *status = uuid_s_bad_version; 97 } else { 98 if (status != NULL) 99 *status = uuid_s_ok; 100 } 101} 102