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152 lines
4.2 KiB
C
152 lines
4.2 KiB
C
/*
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* LZ Decompression functions
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*
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* Copyright 1996 Marcus Meissner
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include <stdarg.h>
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#include "windef.h"
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#include "winbase.h"
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#include "lzexpand.h"
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#include "wine/winbase16.h"
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#include "wine/debug.h"
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WINE_DEFAULT_DEBUG_CHANNEL(file);
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#define MAX_LZSTATES 16
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#define IS_LZ_HANDLE(h) (((h) >= 0x400) && ((h) < 0x400+MAX_LZSTATES))
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/***********************************************************************
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* LZStart (LZEXPAND.7)
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*/
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INT16 WINAPI LZStart16(void)
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{
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TRACE("(void)\n");
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return 1;
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}
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/***********************************************************************
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* LZInit (LZEXPAND.3)
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*/
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HFILE16 WINAPI LZInit16( HFILE16 hfSrc )
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{
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HFILE ret = LZInit( (HFILE)DosFileHandleToWin32Handle(hfSrc) );
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if (IS_LZ_HANDLE(ret)) return ret;
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if ((INT)ret <= 0) return ret;
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return hfSrc;
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}
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/***********************************************************************
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* GetExpandedName (LZEXPAND.10)
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*/
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INT16 WINAPI GetExpandedName16( LPSTR in, LPSTR out )
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{
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return (INT16)GetExpandedNameA( in, out );
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}
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/***********************************************************************
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* LZRead (LZEXPAND.5)
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*/
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INT16 WINAPI LZRead16( HFILE16 fd, LPVOID buf, UINT16 toread )
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{
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if (IS_LZ_HANDLE(fd)) return LZRead( fd, buf, toread );
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return _lread( (HFILE)DosFileHandleToWin32Handle(fd), buf, toread );
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}
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/***********************************************************************
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* LZSeek (LZEXPAND.4)
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*/
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LONG WINAPI LZSeek16( HFILE16 fd, LONG off, INT16 type )
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{
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if (IS_LZ_HANDLE(fd)) return LZSeek( fd, off, type );
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return _llseek( (HFILE)DosFileHandleToWin32Handle(fd), off, type );
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}
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/***********************************************************************
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* LZCopy (LZEXPAND.1)
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*
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*/
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LONG WINAPI LZCopy16( HFILE16 src, HFILE16 dest )
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{
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/* already a LZ handle? */
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if (IS_LZ_HANDLE(src)) return LZCopy( src, (HFILE)DosFileHandleToWin32Handle(dest) );
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/* no, try to open one */
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src = LZInit16(src);
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if ((INT16)src <= 0) return 0;
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if (IS_LZ_HANDLE(src))
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{
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LONG ret = LZCopy( src, (HFILE)DosFileHandleToWin32Handle(dest) );
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LZClose( src );
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return ret;
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}
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/* it was not a compressed file */
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return LZCopy( (HFILE)DosFileHandleToWin32Handle(src), (HFILE)DosFileHandleToWin32Handle(dest) );
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}
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/***********************************************************************
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* LZOpenFile (LZEXPAND.2)
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*/
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HFILE16 WINAPI LZOpenFile16( LPSTR fn, LPOFSTRUCT ofs, UINT16 mode )
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{
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HFILE hfret = LZOpenFileA( fn, ofs, mode );
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/* return errors and LZ handles unmodified */
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if ((INT)hfret <= 0) return hfret;
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if (IS_LZ_HANDLE(hfret)) return hfret;
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/* but allocate a dos handle for 'normal' files */
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return Win32HandleToDosFileHandle((HANDLE)hfret);
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}
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/***********************************************************************
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* LZClose (LZEXPAND.6)
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*/
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void WINAPI LZClose16( HFILE16 fd )
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{
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if (IS_LZ_HANDLE(fd)) LZClose( fd );
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else DisposeLZ32Handle( DosFileHandleToWin32Handle((HFILE)fd) );
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}
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/***********************************************************************
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* CopyLZFile (LZEXPAND.8)
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*/
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LONG WINAPI CopyLZFile16( HFILE16 src, HFILE16 dest )
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{
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TRACE("(%d,%d)\n",src,dest);
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return LZCopy16(src,dest);
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}
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/***********************************************************************
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* LZDone (LZEXPAND.9)
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*/
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void WINAPI LZDone16(void)
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{
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TRACE("(void)\n");
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}
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