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/*
* Copyright (C) 2017 Pali Rohár <pali.rohar@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "libudffs.h"
const char *appname;
size_t gen_uuid_from_vol_set_ident(char uuid[17], const dstring *vol_set_ident, size_t size)
{
size_t i;
size_t len;
size_t nonhexpos;
unsigned char buf[127*4+1];
memset(buf, 0, sizeof(buf));
if (size > 0 && vol_set_ident[size-1] > 0 && vol_set_ident[size-1] < size)
len = decode_utf8((dchars *)vol_set_ident, (char *)buf, vol_set_ident[size-1], sizeof(buf));
else
len = 0;
if (len < 8)
{
uuid[0] = 0;
return (size_t)-1;
}
nonhexpos = 16;
for (i = 0; i < 16; ++i)
{
if (!isxdigit(buf[i]))
{
nonhexpos = i;
break;
}
}
if (nonhexpos < 8)
{
snprintf(uuid, 17, "%02x%02x%02x%02x%02x%02x%02x%02x",
buf[0], buf[1], buf[2], buf[3],
buf[4], buf[5], buf[6], buf[7]);
}
else if (nonhexpos < 16)
{
for (i = 0; i < 8; ++i)
uuid[i] = tolower(buf[i]);
snprintf(uuid + 8, 9, "%02x%02x%02x%02x",
buf[8], buf[9], buf[10], buf[11]);
}
else
{
for (i = 0; i < 16; ++i)
uuid[i] = tolower(buf[i]);
uuid[16] = 0;
}
if (nonhexpos < 16)
return nonhexpos;
return 16;
}
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