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/*
* Copyright (c) 2013-2014 - Andre Roth <neolynx@gmail.com>
*
* This program 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 version 2.1 of the License.
*
* 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser 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
* Or, point your browser to http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
*
*/
#include <libdvbv5/cat.h>
#include <libdvbv5/descriptors.h>
#include <libdvbv5/dvb-fe.h>
#if __GNUC__ >= 9
#pragma GCC diagnostic ignored "-Waddress-of-packed-member"
#endif
ssize_t dvb_table_cat_init(struct dvb_v5_fe_parms *parms, const uint8_t *buf,
ssize_t buflen, struct dvb_table_cat **table)
{
const uint8_t *p = buf, *endbuf = buf + buflen;
struct dvb_table_cat *cat;
struct dvb_desc **head_desc;
size_t size;
size = offsetof(struct dvb_table_cat, descriptor);
if (p + size > endbuf) {
dvb_logerr("%s: short read %zd/%zd bytes", __func__,
endbuf - p, size);
return -1;
}
if (buf[0] != DVB_TABLE_CAT) {
dvb_logerr("%s: invalid marker 0x%02x, should be 0x%02x",
__func__, buf[0], DVB_TABLE_CAT);
return -2;
}
if (!*table) {
*table = calloc(sizeof(struct dvb_table_cat), 1);
if (!*table) {
dvb_logerr("%s: out of memory", __func__);
return -3;
}
}
cat = *table;
memcpy(cat, p, size);
p += size;
dvb_table_header_init(&cat->header);
/* find end of current lists */
head_desc = &cat->descriptor;
while (*head_desc != NULL)
head_desc = &(*head_desc)->next;
size = cat->header.section_length + 3 - DVB_CRC_SIZE; /* plus header, minus CRC */
if (buf + size > endbuf) {
dvb_logerr("%s: short read %zd/%zd bytes", __func__,
endbuf - buf, size);
return -4;
}
endbuf = buf + size;
/* parse the descriptors */
if (endbuf > p) {
uint16_t desc_length = endbuf - p;
if (dvb_desc_parse(parms, p, desc_length,
head_desc) != 0) {
return -5;
}
p += desc_length;
}
if (endbuf - p)
dvb_logwarn("%s: %zu spurious bytes at the end",
__func__, endbuf - p);
return p - buf;
}
void dvb_table_cat_free(struct dvb_table_cat *cat)
{
dvb_desc_free((struct dvb_desc **) &cat->descriptor);
free(cat);
}
void dvb_table_cat_print(struct dvb_v5_fe_parms *parms, struct dvb_table_cat *cat)
{
dvb_loginfo("CAT");
dvb_table_header_print(parms, &cat->header);
dvb_desc_print(parms, cat->descriptor);
}
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