/*
* parse_desc_extension.c
*
* Created by: si_desc.pl
* Created on: 20-May-2011
* Author: sdprice1
*/
// VERSION = 1.00
/*=============================================================================================*/
// USES
/*=============================================================================================*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <ctype.h>
#include <fcntl.h>
#include <inttypes.h>
#include "parse_desc_extension.h"
#include "descriptors/parse_desc.h"
/*=============================================================================================*/
// CONSTANTS
/*=============================================================================================*/
/*=============================================================================================*/
// MACROS
/*=============================================================================================*/
/*=============================================================================================*/
// FUNCTIONS
/*=============================================================================================*/
/* ----------------------------------------------------------------------- */
//
// extension_descriptor(){
// descriptor_tag 8 uimsbf
// descriptor_length 8 uimsbf
// descriptor_tag_extension 8 uimsbf
// for (i=0;i<N;i++){
// selector_byte 8 bslbf
// }
// }
/* ----------------------------------------------------------------------- */
void print_extension(struct Descriptor_extension *ed, int level)
{
struct list_head *item, *safe;
printf(" Descriptor: extension [0x%02x]\n", ed->descriptor_tag) ;
printf(" Length: %d\n", ed->descriptor_length) ;
printf(" descriptor_tag_extension = %d\n", ed->descriptor_tag_extension) ;
printf(" selector = \"%s\"\n", ed->selector) ;
}
/* ----------------------------------------------------------------------- */
struct Descriptor *parse_extension(struct TS_bits *bits, unsigned tag, unsigned len)
{
struct Descriptor_extension *ed ;
unsigned byte ;
int end_buff_len ;
ed = (struct Descriptor_extension *)malloc( sizeof(*ed) ) ;
memset(ed,0,sizeof(*ed));
//== Parse data ==
INIT_LIST_HEAD(&ed->next);
ed->descriptor_tag = tag ; // already extracted by parse_desc()
ed->descriptor_length = len ; // already extracted by parse_desc()
ed->descriptor_tag_extension = bits_get(bits, 8) ;
end_buff_len = bits_len_calc(bits, -(ed->descriptor_length - 1)) ;
ed->selector[0] = 0 ;
for (byte=0; (bits->buff_len > end_buff_len) && (byte < MAX_SELECTOR_LEN); ++byte)
{
ed->selector[byte] = bits_get(bits, 8) ;
ed->selector[byte+1] = 0 ;
}
return (struct Descriptor *)ed ;
}
/* ----------------------------------------------------------------------- */
void free_extension(struct Descriptor_extension *ed)
{
struct list_head *item, *safe;
free(ed) ;
}