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/*
* section and descriptor parser
*
* Copyright (C) 2005 Kenneth Aafloy (kenneth@linuxtv.org)
* 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
*/
#ifndef _UCSI_DVB_LOCAL_TIME_OFFSET_DESCRIPTOR
#define _UCSI_DVB_LOCAL_TIME_OFFSET_DESCRIPTOR 1
#ifdef __cplusplus
extern "C"
{
#endif
#include <libucsi/descriptor.h>
#include <libucsi/endianops.h>
#include <libucsi/types.h>
#include <libucsi/dvb/types.h>
/**
* dvb_local_time_offset_descriptor parameter.
*/
struct dvb_local_time_offset_descriptor {
struct descriptor d;
/* struct dvb_local_time_offset offsets[] */
} __ucsi_packed;
/**
* Entry in the offsets field of dvb_local_time_offset_descriptor.
*/
struct dvb_local_time_offset {
iso639country_t country_code;
EBIT3(uint8_t country_region_id : 6; ,
uint8_t reserved : 1; ,
uint8_t local_time_offset_polarity : 1; );
dvbhhmm_t local_time_offset;
dvbdate_t time_of_change;
dvbhhmm_t next_time_offset;
} __ucsi_packed;
/**
* Process a dvb_local_time_offset_descriptor.
*
* @param d Generic descriptor pointer.
* @return dvb_local_time_offset_descriptor pointer, or NULL on error.
*/
static inline struct dvb_local_time_offset_descriptor*
dvb_local_time_offset_descriptor_codec(struct descriptor* d)
{
uint32_t len = d->len;
uint32_t pos = 0;
if (len % sizeof(struct dvb_local_time_offset))
return NULL;
while(pos < len) {
pos += sizeof(struct dvb_local_time_offset);
}
return (struct dvb_local_time_offset_descriptor*) d;
}
/**
* Iterator for the offsets field of a dvb_local_time_offset_descriptor.
*
* @param d dvb_local_time_offset_descriptor pointer.
* @param pos Variable containing a pointer to the current dvb_local_time_offset.
*/
#define dvb_local_time_offset_descriptor_offsets_for_each(d, pos) \
for ((pos) = dvb_local_time_offset_descriptor_offsets_first(d); \
(pos); \
(pos) = dvb_local_time_offset_descriptor_offsets_next(d, pos))
/******************************** PRIVATE CODE ********************************/
static inline struct dvb_local_time_offset*
dvb_local_time_offset_descriptor_offsets_first(struct dvb_local_time_offset_descriptor *d)
{
if (d->d.len == 0)
return NULL;
return (struct dvb_local_time_offset *)
((uint8_t*) d + sizeof(struct dvb_local_time_offset_descriptor));
}
static inline struct dvb_local_time_offset*
dvb_local_time_offset_descriptor_offsets_next(struct dvb_local_time_offset_descriptor *d,
struct dvb_local_time_offset *pos)
{
uint8_t *end = (uint8_t*) d + 2 + d->d.len;
uint8_t *next = (uint8_t *) pos + sizeof(struct dvb_local_time_offset);
if (next >= end)
return NULL;
return (struct dvb_local_time_offset *) next;
}
#ifdef __cplusplus
}
#endif
#endif
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