92 lines
2.2 KiB
C
92 lines
2.2 KiB
C
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//
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// UNIT : JAM_IO.h
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//
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// FUNCTION : General defines, prototypes, typedefs used in all the
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// supported compression techniques used in JAMPAK Ver x.x
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//
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//
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#ifndef _ID_HEADS_H_
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typedef enum boolean {false,true} boolean;
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#endif
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//==========================================================================
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//
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// PARAMETER PASSING TYPES
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//
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//
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// SOURCE PARAMS (LO BYTE)
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#define SRC_FILE (0x0001) // GE Buffered IO
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#define SRC_FFILE (0x0002) // Stdio File IO (fwrite etc.)
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#define SRC_MEM (0x0004) // Std void ptr (alloc etc)
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#define SRC_BFILE (0x0008) // Buffered File I/O
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#define SRC_TYPES (SRC_FILE | SRC_FFILE | SRC_MEM | SRC_BFILE)
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// DESTINATION PARAMS (HI BYTE)
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#define DEST_FILE (0x0100) // GE Buffered IO
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#define DEST_FFILE (0x0200) // Stdio File IO (fwrite etc.)
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#define DEST_MEM (0x0400) // Std void ptr (alloc etc)
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#define DEST_IMEM (0x0800) // ID Memory alloc
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#define DEST_TYPES (DEST_FILE | DEST_FFILE | DEST_MEM | DEST_IMEM)
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//=========================================================================
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//
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// FILE CHUNK IDs
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//
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// NOTE: The only reason for changing from COMP to CMP1 and having multi
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// comp header structs is for downward compatablity.
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//
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#define COMP ("COMP") // Comp type is ct_LZW ALWAYS!
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#define JAMP ("JAMP") // New Version different from SOFTDISK.
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//
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// COMPRESSION TYPES
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//
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typedef enum ct_TYPES
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{
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ct_NONE = 0, // No compression - Just data..Rarely used!
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ct_LZW, // LZW data compression
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ct_LZH,
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} ct_TYPES;
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//
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// FILE CHUNK HEADER FORMATS
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//
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struct COMPStruct
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{
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unsigned long DecompLen;
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};
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struct JAMPHeader
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{
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unsigned long OrginalLen; // Orginal FileLength of compressed Data.
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ct_TYPES CompType; // SEE: ct_TYPES above for list of pos.
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unsigned long CompressLen; // Length of data after compression (A MUST for LZHUFF!)
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};
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//---------------------------------------------------------------------------
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//
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// FUNCTION PROTOTYPEING
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//
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//---------------------------------------------------------------------------
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char WritePtr(long outfile, unsigned char data, unsigned PtrType);
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int ReadPtr(long infile, unsigned PtrType);
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