153 lines
4.7 KiB
C
153 lines
4.7 KiB
C
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/*
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** common.h - housekeeping for Lempel-Ziv compression / expansion DOS
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** command-line programs, DOS static library module, and Windows
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** DLL
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**
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** Author: DavidDi
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*/
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// Headers
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///////////
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#ifdef LZA_DLL
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#include <windows.h>
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#include <port1632.h>
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#endif
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#include <lzdos.h>
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#include "translat.h"
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// Set up type for function argument pointers.
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#ifdef LZA_DLL
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#define ARG_PTR FAR
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#else
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#define ARG_PTR // nada
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#endif
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// Constants
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/////////////
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#define chEXTENSION_CHAR '_'
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#define pszEXTENSION_STR "_"
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#define pszNULL_EXTENSION "._"
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#define NOTIFY_START_COMPRESS 0 // file processing notifications
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#define NOTIFY_START_EXPAND 1 //
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#define NOTIFY_START_COPY 2 //
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#define BLANK_ERROR 0 // error condition requiring no error
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// message display
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// Types
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/////////
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// Callback notification procedure.
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typedef BOOL (*NOTIFYPROC)(CHAR ARG_PTR *pszSource, CHAR ARG_PTR *pszDest,
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WORD wProcessFlag);
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// Flag indicating whether or not rgbyteInBuf[0], which holds the last byte
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// from the previous input buffer, should be read as the next input byte.
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// (Only used so that at least one unReadUChar() can be done at all input
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// buffer positions.)
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typedef struct tagLZI {
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BYTE *rgbyteRingBuf; // ring buffer for expansion
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BYTE *rgbyteInBuf; // input buffer for reads
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BYTE *pbyteInBufEnd; // pointer past end of rgbyteInBuf[]
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BYTE *pbyteInBuf; // pointer to next byte to read from
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BYTE *rgbyteOutBuf; // output buffer for writes
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BYTE *pbyteOutBufEnd; // pointer past end of rgbyteOutBuf[]
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BYTE *pbyteOutBuf; // pointer to last byte to write from
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// Flag indicating whether or not rgbyteInBuf[0], which holds the last byte
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// from the previous input buffer, should be read as the next input byte.
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// (Only used so that at least one unReadUChar() can be done at all input
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// buffer positions.)
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BOOL bLastUsed;
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// Actually, rgbyteInBuf[] has length (ucbInBufLen + 1) since rgbyteInBuf[0]
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// is used when bLastUsed is TRUE.
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INT cbMaxMatchLen; // longest match length for current algorithm
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LONG cblInSize, // size in bytes of input file
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cblOutSize; // size in bytes of output file
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DWORD ucbInBufLen, // length of input buffer
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ucbOutBufLen; // length of output buffer
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DWORD uFlags; // LZ decoding description byte
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INT iCurRingBufPos; // ring buffer offset
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INT *leftChild; // parents and left and right
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INT *rightChild; // children that make up the
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INT *parent; // binary search trees
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INT iCurMatch, // index of longest match (set by LZInsertNode())
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cbCurMatch; // length of longest match (set by LZInsertNode())
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} LZINFO;
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typedef LZINFO *PLZINFO;
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// Macros
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//////////
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#define FOREVER for(;;)
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#ifndef MAX
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#define MAX(a, b) (((a) > (b)) ? (a) : (b))
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#endif
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#ifndef MIN
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#define MIN(a, b) (((a) < (b)) ? (a) : (b))
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#endif
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// Prototypes
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//////////////
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// compress.c
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extern INT Compress(NOTIFYPROC pfnNotify, CHAR ARG_PTR *pszSource,
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CHAR ARG_PTR *pszDest, BYTE byteAlgorithm,
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BOOL bDoRename, PLZINFO pLZI);
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// expand.c
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extern INT Expand(NOTIFYPROC pfnNotify, CHAR ARG_PTR *pszSource,
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CHAR ARG_PTR *pszDest, BOOL bDoRename, PLZINFO pLZI);
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extern INT ExpandOrCopyFile(INT doshSource, INT doshDest, PLZINFO pLZI);
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// dosdir.asm
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extern INT GetCurDrive(VOID);
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extern INT GetCurDir(LPSTR lpszDirBuf);
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extern INT SetDrive(INT wDrive);
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extern INT SetDir(LPSTR lpszDirName);
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extern INT IsDir(LPSTR lpszDir);
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extern INT IsRemoveable(INT wDrive);
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// utils.c
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extern CHAR ARG_PTR *ExtractFileName(CHAR ARG_PTR *pszPathName);
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extern CHAR ARG_PTR *ExtractExtension(CHAR ARG_PTR *pszFileName);
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extern VOID MakePathName(CHAR ARG_PTR *pszPath, CHAR ARG_PTR *pszFileName);
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extern CHAR MakeCompressedName(CHAR ARG_PTR *pszFileName);
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extern LPWSTR ExtractFileNameW(LPWSTR pszPathName);
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extern LPWSTR ExtractExtensionW(LPWSTR pszFileName);
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extern WCHAR MakeCompressedNameW(LPWSTR pszFileName);
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extern VOID MakeExpandedName(CHAR ARG_PTR *pszFileName,
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BYTE byteExtensionChar);
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extern INT CopyDateTimeStamp(INT_PTR doshFrom, INT_PTR doshTo);
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extern BOOL LZIsCharLowerA(char cChar);
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extern BOOL LZIsCharUpperA(char cChar);
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extern LPSTR LZCharNextA(LPCSTR lpCurrentChar);
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extern LPSTR LZCharPrevA(LPCSTR lpStart, LPCSTR lpCurrentChar);
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#undef IsCharLower
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#undef IsCharUpper
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#undef CharNext
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#undef CharPrev
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#define IsCharLower LZIsCharLowerA
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#define IsCharUpper LZIsCharUpperA
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#define CharNext LZCharNextA
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#define CharPrev LZCharPrevA
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