void far seek_prev_4() /*sets ptr_rw_sub1_0 to position of previous op code 4*/
/*in rewrite a sub code, without changing the */
/*open_segment FILE pointer's position at all*/
{
long save_file_ptr,backwards_ptr;
backwards_ptr = save_file_ptr = my_ftell();
quit_segment = 'f';
get_our_value(8,8);
while((read_element.op_code != 4) && (quit_segment == 'f'))
{
backwards_ptr -= 1L;
if(megatek_seek(which_cseg,backwards_ptr) == FAILURE)
quit_segment = 't';
get_our_value(9,2);
}
ptr_rw_sub1_0 = backwards_ptr;
megatek_seek(which_cseg,save_file_ptr);
quit_segment = 'f';
}
// ********************************************************************************************
bool BitStream::OpenRA(const char *file_name)
{
if (file)
fclose(file);
if ((file = my_fopen(file_name, "rb")) != NULL)
mode = FILE_MODE_READ_RA;
IO_BUFFER_SIZE = BitStream::DEFAULT_IO_BUFFER_SIZE_RA;
io_buffer = new uchar[IO_BUFFER_SIZE];
io_buffer_size = IO_BUFFER_SIZE;
word_buffer_size = 8;
io_buffer_pos = IO_BUFFER_SIZE;
file_pos = 0;
if (mode == FILE_MODE_READ_RA)
{
my_fseek(file, 0, SEEK_END);
file_size = my_ftell(file);
my_fseek(file, 0, SEEK_SET);
}
return mode == FILE_MODE_READ_RA;
}
