Function join_multy_bakup_files

src/burp/split/spit.cpp:956–1009

static int join_multy_bakup_files( b_fil* file_list)
{
/********************************************************************
**
**	j o i n _ m u l t y _ b a c k u p _ f i l e s
**
*********************************************************************
**
**	Functional description:
**
**		allocates I/O buffer and walks through backup files` chain.
**		calls read_and_write_for_join routine to read data from
**		backup file and to write data to standard output file
**		which later to be processed by gbak. Finally frees up
**		I/O buffer
**
*********************************************************************
*/

	FILE_DESC output_fl_desc = GBAK_STDOUT_DESC();

	// See comment near the beginning of gen_multy_bakup_files() as it
	// also applies to read_and_write_for_join().
	UCHAR* const io_buffer = (UCHAR*) malloc(IO_BUFFER_SIZE);
	//UCHAR* io_buffer = (UCHAR*) malloc(IO_BUFFER_SIZE);

	if (io_buffer == 0)
	{
		fprintf(stderr, "I/O buffer allocation failed\n");
		return FB_FAILURE;
	}

	SLONG cnt = 0, total_int = 0;
	// Why two variables to achieve this simple loop?
	const b_fil* next_fl = NULL;
	for (const b_fil* fl_ptr = file_list; fl_ptr; fl_ptr = next_fl)
	{
		cnt++;
		next_fl = fl_ptr->b_fil_next;
		const TEXT* file_name = fl_ptr->b_fil_name;

		SLONG ret_cd = read_and_write_for_join(output_fl_desc, file_name, io_buffer, cnt, &total_int);

		if (ret_cd == FB_FAILURE)
		{
			free(io_buffer);
			return FB_FAILURE;
		}

	}							// end of for loop

	free(io_buffer);
	return FB_SUCCESS;
}


static int read_and_write_for_join(FILE_DESC output_fl_desc,