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/*
* section and descriptor parser
*
* Copyright (C) 2005 Andrew de Quincey (adq_dvb@lidskialf.net)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <string.h>
#include "libucsi/atsc/types.h"
/* GPS epoch == unix time_t at 06/Jan/1980 */
#define GPS_EPOCH 315964800
int atsc_text_validate(uint8_t *buf, int len)
{
int i;
int j;
int number_strings;
int number_segments;
int number_bytes;
int pos = 0;
if (len == 0)
return 0;
number_strings = buf[pos];
pos++;
for(i=0; i< number_strings; i++) {
if (len < (pos+4))
return -1;
number_segments = buf[pos+3];
pos+=4;
for(j=0; j < number_segments; j++) {
if (len < (pos+3))
return -1;
number_bytes = buf[pos+2];
pos+=3;
if (len < (pos + number_bytes))
return -1;
pos += number_bytes;
}
}
return 0;
}
time_t atsctime_to_unixtime(atsctime_t atsc)
{
return atsc + GPS_EPOCH;
}
atsctime_t unixtime_to_atsctime(time_t t)
{
return t - GPS_EPOCH;
}
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