102 lines
3.4 KiB
C
102 lines
3.4 KiB
C
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/* $NetBSD: uuid_from_string.c,v 1.1 2004/09/13 21:44:54 thorpej Exp $ */
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/*-
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* Copyright (c) 2002 Marcel Moolenaar
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* Copyright (c) 2002 Hiten Mahesh Pandya
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD: src/lib/libc/uuid/uuid_from_string.c,v 1.2 2003/08/08 19:18:43 marcel Exp $
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*/
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#include <sys/cdefs.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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__RCSID("$NetBSD: uuid_from_string.c,v 1.1 2004/09/13 21:44:54 thorpej Exp $");
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#endif
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#include "namespace.h"
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#include <stdio.h>
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#include <string.h>
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#include <uuid.h>
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/*
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* uuid_from_string() - convert a string representation of an UUID into
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* a binary representation.
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* See also:
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* http://www.opengroup.org/onlinepubs/009629399/uuid_from_string.htm
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*
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* NOTE: The sequence field is in big-endian, while the time fields are in
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* native byte order.
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*/
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void
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uuid_from_string(const char *s, uuid_t *u, uint32_t *status)
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{
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int n;
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/* Short-circuit 2 special cases: NULL pointer and empty string. */
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if (s == NULL || *s == '\0') {
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uuid_create_nil(u, status);
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return;
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}
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/* Assume the worst. */
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if (status != NULL)
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*status = uuid_s_invalid_string_uuid;
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/* The UUID string representation has a fixed length. */
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if (strlen(s) != 36)
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return;
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/*
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* We only work with "new" UUIDs. New UUIDs have the form:
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* 01234567-89ab-cdef-0123-456789abcdef
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* The so called "old" UUIDs, which we don't support, have the form:
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* 0123456789ab.cd.ef.01.23.45.67.89.ab
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*/
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if (s[8] != '-')
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return;
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n = sscanf(s,
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"%8x-%4hx-%4hx-%2hhx%2hhx-%2hhx%2hhx%2hhx%2hhx%2hhx%2hhx",
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&u->time_low, &u->time_mid, &u->time_hi_and_version,
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&u->clock_seq_hi_and_reserved, &u->clock_seq_low, &u->node[0],
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&u->node[1], &u->node[2], &u->node[3], &u->node[4], &u->node[5]);
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/* Make sure we have all conversions. */
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if (n != 11)
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return;
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/* We have a successful scan. Check semantics... */
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n = u->clock_seq_hi_and_reserved;
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if ((n & 0x80) != 0x00 && /* variant 0? */
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(n & 0xc0) != 0x80 && /* variant 1? */
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(n & 0xe0) != 0xc0) { /* variant 2? */
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if (status != NULL)
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*status = uuid_s_bad_version;
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} else {
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if (status != NULL)
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*status = uuid_s_ok;
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}
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}
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