76e95daa08
Co-authored-by: Pierre-Anthony Lemieux <pal@palemieux.com> Signed-off-by: Zane van Iperen <zane@zanevaniperen.com>
142 lines
4.2 KiB
C
142 lines
4.2 KiB
C
/*
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* Copyright (c) 2022 Pierre-Anthony Lemieux <pal@palemieux.com>
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* Zane van Iperen <zane@zanevaniperen.com>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/*
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* Copyright (C) 1996, 1997 Theodore Ts'o.
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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, and the entire permission notice in its entirety,
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* including the disclaimer of warranties.
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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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* 3. The name of the author may not be used to endorse or promote
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* products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ALL OF
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* WHICH ARE HEREBY DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
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* USE OF THIS SOFTWARE, EVEN IF NOT ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*/
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/**
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* @file
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* UUID parsing and serialization utilities.
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* The library treat the UUID as an opaque sequence of 16 unsigned bytes,
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* i.e. ignoring the internal layout of the UUID, which depends on the type
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* of the UUID.
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*
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* @author Pierre-Anthony Lemieux <pal@palemieux.com>
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* @author Zane van Iperen <zane@zanevaniperen.com>
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*/
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#include "uuid.h"
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#include "error.h"
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#include "avstring.h"
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int av_uuid_parse(const char *in, AVUUID uu)
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{
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if (strlen(in) != 36)
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return AVERROR(EINVAL);
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return av_uuid_parse_range(in, in + 36, uu);
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}
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static int xdigit_to_int(char c)
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{
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c = av_tolower(c);
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if (c >= 'a' && c <= 'f')
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return c - 'a' + 10;
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if (c >= '0' && c <= '9')
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return c - '0';
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return -1;
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}
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int av_uuid_parse_range(const char *in_start, const char *in_end, AVUUID uu)
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{
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int i;
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const char *cp;
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if ((in_end - in_start) != 36)
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return AVERROR(EINVAL);
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for (i = 0, cp = in_start; i < 16; i++) {
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int hi;
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int lo;
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if (i == 4 || i == 6 || i == 8 || i == 10)
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cp++;
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hi = xdigit_to_int(*cp++);
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lo = xdigit_to_int(*cp++);
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if (hi == -1 || lo == -1)
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return AVERROR(EINVAL);
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uu[i] = (hi << 4) + lo;
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}
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return 0;
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}
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static const char hexdigits_lower[16] = "0123456789abcdef";
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void av_uuid_unparse(const AVUUID uuid, char *out)
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{
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char *p = out;
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for (int i = 0; i < 16; i++) {
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uint8_t tmp;
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if (i == 4 || i == 6 || i == 8 || i == 10)
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*p++ = '-';
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tmp = uuid[i];
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*p++ = hexdigits_lower[tmp >> 4];
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*p++ = hexdigits_lower[tmp & 15];
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}
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*p = '\0';
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}
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int av_uuid_urn_parse(const char *in, AVUUID uu)
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{
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if (av_stristr(in, "urn:uuid:") != in)
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return AVERROR(EINVAL);
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return av_uuid_parse(in + 9, uu);
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}
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