packbits.c File Reference

Packbits compression as used in IFF etc. More...

#include <stdio.h>
#include <string.h>
#include "struct.h"
#include "io.h"
#include "gfx2log.h"
#include "packbits.h"

Include dependency graph for packbits.c:

Functions
int	PackBits_unpack_from_file (FILE *f, byte *dest, unsigned int count)
void	PackBits_pack_init (T_PackBits_data *data, FILE *f)
	init before packing More...
int	PackBits_pack_add (T_PackBits_data *data, byte b)
	Add a byte to the packbits stream. More...
int	PackBits_pack_flush (T_PackBits_data *data)
	Flush the packed data to the file. More...
int	PackBits_pack_buffer (FILE *f, const byte *buffer, size_t size)
	Pack a full buffer to FILE. More...

Detailed Description

Packbits compression as used in IFF etc.

see http://fileformats.archiveteam.org/wiki/PackBits

Function Documentation

PackBits_unpack_from_file()

int PackBits_unpack_from_file	(	FILE *	f,
		byte *	dest,
		unsigned int	count
	)

Returns

PACKBITS_UNPACK_OK or PACKBITS_UNPACK_READ_ERROR or PACKBITS_UNPACK_OVERFLOW_ERROR

References GFX2_Log(), GFX2_WARNING, PACKBITS_UNPACK_OK, PACKBITS_UNPACK_OVERFLOW_ERROR, and PACKBITS_UNPACK_READ_ERROR.

Referenced by Load_PC1(), and Test_Packbits().

PackBits_pack_init()

void PackBits_pack_init	(	T_PackBits_data *	data,
		FILE *	f
	)

init before packing

Parameters

data	storage for packbits data
f	FILE output or NULL (for no output)

References T_PackBits_data::f.

Referenced by PackBits_pack_buffer(), Save_IFF(), and Test_Packbits().

PackBits_pack_add()

int PackBits_pack_add	(	T_PackBits_data *	data,
		byte	b
	)

Add a byte to the packbits stream.

Returns

-1 for error, 0 if OK

References T_PackBits_data::list, T_PackBits_data::list_size, PackBits_pack_flush(), and T_PackBits_data::repetition_mode.

Referenced by PackBits_pack_buffer(), Save_IFF(), and Test_Packbits().

PackBits_pack_flush()

int PackBits_pack_flush

(

T_PackBits_data *

data

)

Flush the packed data to the file.

Returns

-1 for error, or the size of the packed stream so far

References T_PackBits_data::f, GFX2_ERROR, GFX2_Log(), T_PackBits_data::list, T_PackBits_data::list_size, NULL, T_PackBits_data::output_count, T_PackBits_data::repetition_mode, Write_byte(), and Write_bytes().

Referenced by PackBits_pack_add(), PackBits_pack_buffer(), Save_IFF(), and Test_Packbits().

PackBits_pack_buffer()

int PackBits_pack_buffer	(	FILE *	f,
		const byte *	buffer,
		size_t	size
	)

Pack a full buffer to FILE.

Parameters

f	FILE output or NULL (for no output)
buffer	input buffer
size	byte size of input buffer

Returns

-1 for error, or the size of the packed stream so far

References PackBits_pack_add(), PackBits_pack_flush(), and PackBits_pack_init().

Referenced by Save_PC1(), and Save_PRG().