79 lines
2.2 KiB
C
79 lines
2.2 KiB
C
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/*
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** lzpriv.h - Private information for LZEXPAND.DLL.
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**
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** Author: DavidDi
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*/
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// Constants
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/////////////
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#define IN_BUF_LEN (1 + 1024) // size of input buffer
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#define EXP_BUF_LEN 1024 // size of expanded data buffer
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#define RING_BUF_LEN 4096 // size of ring buffer data area
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#define MAX_RING_BUF_LEN 4224 // total size of ring buffer
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#define MAX_CHAR_CODES 400 // maximum number of character codes
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#define MAX_LZFILES 16 // maximum number of LZFile structs
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#define LZ_TABLE_BIAS 1024 // offset of first LZFile entry in table of
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// handles, should be > 255
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// (255 == largest possible DOS file handle)
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#define STYLE_MASK 0xff0f // wStyle mask used to determine whether
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// or not to set up an LZFile information
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// struct in LZOpenFile()
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// (used to ignore SHARE bits)
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#define LZAPI PASCAL
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// Decoding bit flags used in LZFile.DecodeState.wFlags:
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#define LZF_INITIALIZED 0x00000001 // 1 ==> buffers have been initialized
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// 0 ==> not initialized yet
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// DOS Extended Error Codes
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#define DEE_FILENOTFOUND 0x02 // File not found. Awww...
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// Types
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/////////
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typedef struct tagLZFile
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{
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int dosh; /* DOS file handle of compressed file */
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BYTE byteAlgorithm; /* compression algorithm */
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WORD wFlags; /* bit flags */
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unsigned long cbulUncompSize; /* uncompressed file size */
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unsigned long cbulCompSize; /* compressed file size */
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RTL_CRITICAL_SECTION semFile; /* protect against >1 threads LZReading the same file all at once */
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long lCurSeekPos; /* expanded file pointer position */
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PLZINFO pLZI;
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} LZFile;
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// Globals
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///////////
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extern HANDLE rghLZFileTable[MAX_LZFILES];
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// Prototypes
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//////////////
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// state.c
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VOID SetGlobalBuffers(LZFile FAR *pLZFile);
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VOID SaveDecodingState(LZFile FAR *pLZFile);
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VOID RestoreDecodingState(LZFile FAR *pLZFile);
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INT ConvertWin32FHToDos(HFILE DoshSource);
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HFILE ConvertDosFHToWin32(INT DoshSource);
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