dlls/lzexpand.dll16/lzexpand.c

   1 /*
   2  * LZ Decompression functions
   3  *
   4  * Copyright 1996 Marcus Meissner
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #include <stdarg.h>
  22
  23 #include "windef.h"
  24 #include "winbase.h"
  25 #include "lzexpand.h"
  26
  27 #include "wine/winbase16.h"
  28
  29 #include "wine/debug.h"
  30
  31 WINE_DEFAULT_DEBUG_CHANNEL(file);
  32
  33 #define MAX_LZSTATES 16
  34
  35 #define IS_LZ_HANDLE(h) (((h) >= 0x400) && ((h) < 0x400+MAX_LZSTATES))
  36
  37
  38 /***********************************************************************
  39  *           LZStart   (LZEXPAND.7)
  40  */
  41 INT16 WINAPI LZStart16(void)
  42 {
  43     TRACE("(void)\n");
  44     return 1;
  45 }
  46
  47
  48 /***********************************************************************
  49  *           LZInit   (LZEXPAND.3)
  50  */
  51 HFILE16 WINAPI LZInit16( HFILE16 hfSrc )
  52 {
  53     HFILE ret = LZInit( (HFILE)DosFileHandleToWin32Handle(hfSrc) );
  54     if (IS_LZ_HANDLE(ret)) return ret;
  55     if ((INT)ret <= 0) return ret;
  56     return hfSrc;
  57 }
  58
  59
  60 /***********************************************************************
  61  *           GetExpandedName   (LZEXPAND.10)
  62  */
  63 INT16 WINAPI GetExpandedName16( LPSTR in, LPSTR out )
  64 {
  65     return (INT16)GetExpandedNameA( in, out );
  66 }
  67
  68
  69 /***********************************************************************
  70  *           LZRead   (LZEXPAND.5)
  71  */
  72 INT16 WINAPI LZRead16( HFILE16 fd, LPVOID buf, UINT16 toread )
  73 {
  74     if (IS_LZ_HANDLE(fd)) return LZRead( fd, buf, toread );
  75     return _lread( (HFILE)DosFileHandleToWin32Handle(fd), buf, toread );
  76 }
  77
  78
  79 /***********************************************************************
  80  *           LZSeek   (LZEXPAND.4)
  81  */
  82 LONG WINAPI LZSeek16( HFILE16 fd, LONG off, INT16 type )
  83 {
  84     if (IS_LZ_HANDLE(fd)) return LZSeek( fd, off, type );
  85     return _llseek( (HFILE)DosFileHandleToWin32Handle(fd), off, type );
  86 }
  87
  88
  89 /***********************************************************************
  90  *           LZCopy   (LZEXPAND.1)
  91  *
  92  */
  93 LONG WINAPI LZCopy16( HFILE16 src, HFILE16 dest )
  94 {
  95     /* already a LZ handle? */
  96     if (IS_LZ_HANDLE(src)) return LZCopy( src, (HFILE)DosFileHandleToWin32Handle(dest) );
  97
  98     /* no, try to open one */
  99     src = LZInit16(src);
 100     if ((INT16)src <= 0) return 0;
 101     if (IS_LZ_HANDLE(src))
 102     {
 103         LONG ret = LZCopy( src, (HFILE)DosFileHandleToWin32Handle(dest) );
 104         LZClose( src );
 105         return ret;
 106     }
 107     /* it was not a compressed file */
 108     return LZCopy( (HFILE)DosFileHandleToWin32Handle(src), (HFILE)DosFileHandleToWin32Handle(dest) );
 109 }
 110
 111
 112 /***********************************************************************
 113  *           LZOpenFile   (LZEXPAND.2)
 114  */
 115 HFILE16 WINAPI LZOpenFile16( LPSTR fn, LPOFSTRUCT ofs, UINT16 mode )
 116 {
 117     HFILE hfret = LZOpenFileA( fn, ofs, mode );
 118     /* return errors and LZ handles unmodified */
 119     if ((INT)hfret <= 0) return hfret;
 120     if (IS_LZ_HANDLE(hfret)) return hfret;
 121     /* but allocate a dos handle for 'normal' files */
 122     return Win32HandleToDosFileHandle((HANDLE)hfret);
 123 }
 124
 125
 126 /***********************************************************************
 127  *           LZClose   (LZEXPAND.6)
 128  */
 129 void WINAPI LZClose16( HFILE16 fd )
 130 {
 131     if (IS_LZ_HANDLE(fd)) LZClose( fd );
 132     else DisposeLZ32Handle( DosFileHandleToWin32Handle((HFILE)fd) );
 133 }
 134
 135
 136 /***********************************************************************
 137  *           CopyLZFile   (LZEXPAND.8)
 138  */
 139 LONG WINAPI CopyLZFile16( HFILE16 src, HFILE16 dest )
 140 {
 141     TRACE("(%d,%d)\n",src,dest);
 142     return LZCopy16(src,dest);
 143 }
 144
 145
 146 /***********************************************************************
 147  *           LZDone   (LZEXPAND.9)
 148  */
 149 void WINAPI LZDone16(void)
 150 {
 151     TRACE("(void)\n");
 152 }