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JM_CIO.H
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JM_CIO.H
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#ifndef _JM_CIO_H_
#define _JM_CIO_H_
//
// UNIT : JM_CIO.h
//
// FUNCTION : General defines, prototypes, typedefs used in all the
// supported compression techniques used in JAMPAK Ver x.x
//
//
#ifndef _ID_HEADS_H_
typedef enum boolean {false,true} boolean;
#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 JAMP ("JAMP") // New Version different from SOFTDISK.
//
// 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
//
struct COMPStruct
{
unsigned long DecompLen;
};
struct JAMPHeader
{
unsigned long OriginalLen; // Original FileLength of compressed Data.
ct_TYPES CompType; // SEE: ct_TYPES above for list of pos.
unsigned long CompressLen; // Length of data after compression (A MUST for LZHUFF!)
};
//
// Header on JAMPAKd Data
//
typedef struct
{
char NameId[4];
unsigned long OriginalLen; // Original FileLength of compressed Data.
ct_TYPES CompType; // SEE: ct_TYPES above for list of pos.
unsigned long CompressLen; // Length of data after compression (A MUST for LZHUFF!)
} CompHeader_t;
//---------------------------------------------------------------------------
//
// FUNCTION PROTOTYPEING
//
//---------------------------------------------------------------------------
char CIO_WritePtr(long outfile, unsigned char data, unsigned PtrType);
int CIO_ReadPtr(long infile, unsigned PtrType);
#endif