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<hr><h1>cpl_vsil_win32.cpp</h1><div class="fragment"><pre>00001 <font class="comment">/**********************************************************************</font>
00002 <font class="comment"> * $Id: cpl_vsil_win32_cpp-source.html,v 1.5 2002/04/16 13:11:48 warmerda Exp $</font>
00003 <font class="comment"> *</font>
00004 <font class="comment"> * Project: CPL - Common Portability Library</font>
00005 <font class="comment"> * Purpose: Implement VSI large file api for Win32.</font>
00006 <font class="comment"> * Author: Frank Warmerdam, warmerdam@pobox.com</font>
00007 <font class="comment"> *</font>
00008 <font class="comment"> **********************************************************************</font>
00009 <font class="comment"> * Copyright (c) 2000, Frank Warmerdam</font>
00010 <font class="comment"> *</font>
00011 <font class="comment"> * Permission is hereby granted, free of charge, to any person obtaining a</font>
00012 <font class="comment"> * copy of this software and associated documentation files (the "Software"),</font>
00013 <font class="comment"> * to deal in the Software without restriction, including without limitation</font>
00014 <font class="comment"> * the rights to use, copy, modify, merge, publish, distribute, sublicense,</font>
00015 <font class="comment"> * and/or sell copies of the Software, and to permit persons to whom the</font>
00016 <font class="comment"> * Software is furnished to do so, subject to the following conditions:</font>
00017 <font class="comment"> * </font>
00018 <font class="comment"> * The above copyright notice and this permission notice shall be included</font>
00019 <font class="comment"> * in all copies or substantial portions of the Software.</font>
00020 <font class="comment"> * </font>
00021 <font class="comment"> * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR</font>
00022 <font class="comment"> * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,</font>
00023 <font class="comment"> * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL</font>
00024 <font class="comment"> * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER</font>
00025 <font class="comment"> * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING</font>
00026 <font class="comment"> * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER </font>
00027 <font class="comment"> * DEALINGS IN THE SOFTWARE.</font>
00028 <font class="comment"> **********************************************************************</font>
00029 <font class="comment"> *</font>
00030 <font class="comment"> * $Log: cpl_vsil_win32_cpp-source.html,v $
00030 <font class="comment"> * Revision 1.5 2002/04/16 13:11:48 warmerda
00030 <font class="comment"> * updated
00030 <font class="comment"> *</font>
00031 <font class="comment"> * Revision 1.5 2001/07/18 04:00:49 warmerda</font>
00032 <font class="comment"> * added CPL_CVSID</font>
00033 <font class="comment"> *</font>
00034 <font class="comment"> * Revision 1.4 2001/06/21 20:40:31 warmerda</font>
00035 <font class="comment"> * *** empty log message ***</font>
00036 <font class="comment"> *</font>
00037 <font class="comment"> * Revision 1.3 2001/06/11 13:47:07 warmerda</font>
00038 <font class="comment"> * initialize HighPart in VSIFTellL()</font>
00039 <font class="comment"> *</font>
00040 <font class="comment"> * Revision 1.2 2001/01/19 21:16:41 warmerda</font>
00041 <font class="comment"> * expanded tabs</font>
00042 <font class="comment"> *</font>
00043 <font class="comment"> * Revision 1.1 2001/01/03 16:16:59 warmerda</font>
00044 <font class="comment"> * New</font>
00045 <font class="comment"> *</font>
00046 <font class="comment"> */</font>
00047
00048 <font class="preprocessor">#include "<a class="code" href="cpl_vsi_h.html">cpl_vsi.h</a>"</font>
00049
00050 <font class="preprocessor">#if defined(WIN32)</font>
00051 <font class="preprocessor"></font>
00052 CPL_CVSID(<font class="stringliteral">"$Id: cpl_vsil_win32_cpp-source.html,v 1.5 2002/04/16 13:11:48 warmerda Exp $"</font>);
00053
00054 <font class="preprocessor">#include <windows.h></font>
00055
00056 <font class="comment">/************************************************************************/</font>
00057 <font class="comment">/* VSIFOpen() */</font>
00058 <font class="comment">/************************************************************************/</font>
00059
00060 FILE *VSIFOpenL( <font class="keyword">const</font> <font class="keywordtype">char</font> * pszFilename, <font class="keyword">const</font> <font class="keywordtype">char</font> * pszAccess )<font class="keyword"></font>
00061 <font class="keyword"></font>
00062 <font class="keyword"></font>{
00063 DWORD dwDesiredAccess, dwCreationDisposition;
00064 HANDLE hFile;
00065
00066 <font class="keywordflow">if</font>( strchr(pszAccess, <font class="charliteral">'+'</font>) != NULL || strchr(pszAccess, <font class="charliteral">'w'</font>) != 0 )
00067 dwDesiredAccess = GENERIC_READ | GENERIC_WRITE;
00068 <font class="keywordflow">else</font>
00069 dwDesiredAccess = GENERIC_READ;
00070
00071 <font class="keywordflow">if</font>( strstr(pszAccess, <font class="stringliteral">"w"</font>) != NULL )
00072 dwCreationDisposition = CREATE_ALWAYS;
00073 <font class="keywordflow">else</font>
00074 dwCreationDisposition = OPEN_EXISTING;
00075
00076 hFile = CreateFile( pszFilename, dwDesiredAccess,
00077 FILE_SHARE_READ | FILE_SHARE_WRITE,
00078 NULL, dwCreationDisposition,
00079 (dwDesiredAccess == GENERIC_READ) ?
00080 FILE_ATTRIBUTE_READONLY : FILE_ATTRIBUTE_NORMAL,
00081 NULL );
00082
00083 <font class="keywordflow">if</font>( hFile == INVALID_HANDLE_VALUE )
00084 {
00085 <font class="keywordflow">return</font> NULL;
00086 }
00087 <font class="keywordflow">else</font>
00088 {
00089 <font class="keywordflow">return</font> (FILE *) hFile;
00090 }
00091 }
00092
00093 <font class="comment">/************************************************************************/</font>
00094 <font class="comment">/* VSIFCloseL() */</font>
00095 <font class="comment">/************************************************************************/</font>
00096
00097 <font class="keywordtype">int</font> VSIFCloseL( FILE * fp )<font class="keyword"></font>
00098 <font class="keyword"></font>
00099 <font class="keyword"></font>{
00100 HANDLE hFile = (HANDLE) fp;
00101
00102 <font class="keywordflow">return</font> CloseHandle( hFile ) ? 0 : -1;
00103 }
00104
00105 <font class="comment">/************************************************************************/</font>
00106 <font class="comment">/* VSIFSeekL() */</font>
00107 <font class="comment">/************************************************************************/</font>
00108
00109 <font class="keywordtype">int</font> VSIFSeekL( FILE * fp, vsi_l_offset nOffset, <font class="keywordtype">int</font> nWhence )<font class="keyword"></font>
00110 <font class="keyword"></font>
00111 <font class="keyword"></font>{
00112 HANDLE hFile = (HANDLE) fp;
00113 GUInt32 dwMoveMethod, dwMoveHigh;
00114 GUInt32 nMoveLow;
00115 LARGE_INTEGER li;
00116
00117 <font class="keywordflow">switch</font>(nWhence)
00118 {
00119 <font class="keywordflow">case</font> SEEK_CUR:
00120 dwMoveMethod = FILE_CURRENT;
00121 <font class="keywordflow">break</font>;
00122 <font class="keywordflow">case</font> SEEK_END:
00123 dwMoveMethod = FILE_END;
00124 <font class="keywordflow">break</font>;
00125 <font class="keywordflow">case</font> SEEK_SET:
00126 <font class="keywordflow">default</font>:
00127 dwMoveMethod = FILE_BEGIN;
00128 <font class="keywordflow">break</font>;
00129 }
00130
00131 li.QuadPart = nOffset;
00132 nMoveLow = li.LowPart;
00133 dwMoveHigh = li.HighPart;
00134
00135 SetLastError( 0 );
00136 SetFilePointer(hFile, (LONG) nMoveLow, (PLONG)&dwMoveHigh,
00137 dwMoveMethod);
00138
00139 <font class="keywordflow">if</font>( GetLastError() != NO_ERROR )
00140 {
00141 <font class="preprocessor">#ifdef notdef</font>
00142 <font class="preprocessor"></font> LPVOID lpMsgBuf = NULL;
00143
00144 FormatMessage( FORMAT_MESSAGE_ALLOCATE_BUFFER
00145 | FORMAT_MESSAGE_FROM_SYSTEM
00146 | FORMAT_MESSAGE_IGNORE_INSERTS,
00147 NULL, GetLastError(),
00148 MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
00149 (LPTSTR) &lpMsgBuf, 0, NULL );
00150
00151 printf( <font class="stringliteral">"[ERROR %d]\n %s\n"</font>, GetLastError(), (<font class="keywordtype">char</font> *) lpMsgBuf );
00152 printf( <font class="stringliteral">"nOffset=%u, nMoveLow=%u, dwMoveHigh=%u\n"</font>,
00153 (GUInt32) nOffset, nMoveLow, dwMoveHigh );
00154 <font class="preprocessor">#endif</font>
00155 <font class="preprocessor"></font>
00156 <font class="keywordflow">return</font> -1;
00157 }
00158 <font class="keywordflow">else</font>
00159 <font class="keywordflow">return</font> 0;
00160 }
00161
00162 <font class="comment">/************************************************************************/</font>
00163 <font class="comment">/* VSIFTellL() */</font>
00164 <font class="comment">/************************************************************************/</font>
00165
00166 vsi_l_offset VSIFTellL( FILE * fp )<font class="keyword"></font>
00167 <font class="keyword"></font>
00168 <font class="keyword"></font>{
00169 HANDLE hFile = (HANDLE) fp;
00170 DWORD dwMoveHigh=0, dwMoveLow;
00171 LARGE_INTEGER li;
00172
00173 li.HighPart = 0;
00174 li.LowPart = SetFilePointer( hFile, 0, (PLONG) &(li.HighPart),
00175 FILE_CURRENT );
00176
00177 <font class="keywordflow">return</font> li.QuadPart;
00178 }
00179
00180 <font class="comment">/************************************************************************/</font>
00181 <font class="comment">/* VSIRewindL() */</font>
00182 <font class="comment">/************************************************************************/</font>
00183
00184 <font class="keywordtype">void</font> VSIRewindL( FILE * fp )<font class="keyword"></font>
00185 <font class="keyword"></font>
00186 <font class="keyword"></font>{
00187 VSIFSeekL( fp, 0, SEEK_SET );
00188 }
00189
00190 <font class="comment">/************************************************************************/</font>
00191 <font class="comment">/* VSIFFlushL() */</font>
00192 <font class="comment">/************************************************************************/</font>
00193
00194 <font class="keywordtype">void</font> VSIFFlushL( FILE * fp )<font class="keyword"></font>
00195 <font class="keyword"></font>
00196 <font class="keyword"></font>{
00197 HANDLE hFile = (HANDLE) fp;
00198
00199 FlushFileBuffers( hFile );
00200 }
00201
00202 <font class="comment">/************************************************************************/</font>
00203 <font class="comment">/* VSIFReadL() */</font>
00204 <font class="comment">/************************************************************************/</font>
00205
00206 size_t VSIFReadL( <font class="keywordtype">void</font> * pBuffer, size_t nSize, size_t nCount, FILE * fp )<font class="keyword"></font>
00207 <font class="keyword"></font>
00208 <font class="keyword"></font>{
00209 HANDLE hFile = (HANDLE) fp;
00210 DWORD dwSizeRead;
00211
00212 <font class="keywordflow">if</font>( !ReadFile( hFile, pBuffer, nSize * nCount, &dwSizeRead, NULL ) )
00213 <font class="keywordflow">return</font> 0;
00214 <font class="keywordflow">else</font>
00215 <font class="keywordflow">return</font> dwSizeRead / nSize;
00216 }
00217
00218 <font class="comment">/************************************************************************/</font>
00219 <font class="comment">/* VSIFWriteL() */</font>
00220 <font class="comment">/************************************************************************/</font>
00221
00222 size_t VSIFWriteL( <font class="keywordtype">void</font> * pBuffer, size_t nSize, size_t nCount, FILE * fp )<font class="keyword"></font>
00223 <font class="keyword"></font>
00224 <font class="keyword"></font>{
00225 HANDLE hFile = (HANDLE) fp;
00226 DWORD dwSizeWritten;
00227
00228 <font class="keywordflow">if</font>( !WriteFile( hFile, pBuffer, nSize * nCount, &dwSizeWritten, NULL ) )
00229 <font class="keywordflow">return</font> 0;
00230 <font class="keywordflow">else</font>
00231 <font class="keywordflow">return</font> dwSizeWritten / nSize;
00232 }
00233
00234 <font class="comment">/************************************************************************/</font>
00235 <font class="comment">/* VSIFEofL() */</font>
00236 <font class="comment">/************************************************************************/</font>
00237
00238 <font class="keywordtype">int</font> VSIFEofL( FILE * fp )<font class="keyword"></font>
00239 <font class="keyword"></font>
00240 <font class="keyword"></font>{
00241 vsi_l_offset nCur, nEnd;
00242
00243 nCur = VSIFTell( fp );
00244 VSIFSeekL( fp, 0, SEEK_END );
00245 nEnd = VSIFTell( fp );
00246 VSIFSeekL( fp, nCur, SEEK_SET );
00247
00248 <font class="keywordflow">return</font> (nCur == nEnd);
00249 }
00250
00251 <font class="preprocessor">#endif </font><font class="comment">/* defined WIN32 */</font>
00252
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