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jam_io.h
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jam_io.h
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/* Keen Dreams (SDL2/Steam Port) Source Code
* Copyright (C) 2014 Javier M. Chavez
* Copyright (C) 2015 David Gow <[email protected]>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
//
// UNIT : JAM_IO.h
//
// FUNCTION : General defines, prototypes, typedefs used in all the
// supported compression techniques used in JAMPAK Ver x.x
//
//
#include <stdint.h>
#ifndef __WIN_UTILS__
#include "win_utils.h"
#endif
//==========================================================================
//
// PARAMETER PASSING TYPES
//
//
// SOURCE PARAMS (LO BYTE)
#define SRC_FILE (0x0001) // GE Buffered IO
#define SRC_FFILE (0x0002) // Stdio File IO (fwrite etc.)
#define SRC_MEM (0x0004) // Std void ptr (alloc etc)
#define SRC_BFILE (0x0008) // Buffered File I/O
#define SRC_TYPES (SRC_FILE | SRC_FFILE | SRC_MEM | SRC_BFILE)
// DESTINATION PARAMS (HI BYTE)
#define DEST_FILE (0x0100) // GE Buffered IO
#define DEST_FFILE (0x0200) // Stdio File IO (fwrite etc.)
#define DEST_MEM (0x0400) // Std void ptr (alloc etc)
#define DEST_IMEM (0x0800) // ID Memory alloc
#define DEST_TYPES (DEST_FILE | DEST_FFILE | DEST_MEM | DEST_IMEM)
//=========================================================================
//
// FILE CHUNK IDs
//
// NOTE: The only reason for changing from COMP to CMP1 and having multi
// comp header structs is for downward compatablity.
//
#define COMP ("COMP") // Comp type is ct_LZW ALWAYS!
#define CMP1 ("CMP1") // Comp type is determined in header.
//
// COMPRESSION TYPES
//
typedef enum ct_TYPES
{
ct_NONE = 0, // No compression - Just data..Rarely used!
ct_LZW, // LZW data compression
ct_LZH,
} ct_TYPES;
//
// FILE CHUNK HEADER FORMATS
//
PACKED_notypedef(COMPStruct)
{
uint32_t DecompLen;
};
PACKED_notypedef(CMP1Header)
{
uint16_t CompType; // SEE: ct_TYPES above for list of pos.
uint32_t OrginalLen; // Orginal FileLength of compressed Data.
uint32_t CompressLen; // Length of data after compression (A MUST for LZHUFF!)
};
//---------------------------------------------------------------------------
//
// FUNCTION PROTOTYPEING
//
//---------------------------------------------------------------------------
char WritePtr(void *outfile, unsigned char data, unsigned PtrType);
int ReadPtr(void *infile, unsigned PtrType);