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00001 /****************************************************************************** 00002 * $Id: cpl_vsi.h 20996 2010-10-28 18:38:15Z rouault $ 00003 * 00004 * Project: CPL - Common Portability Library 00005 * Author: Frank Warmerdam, warmerdam@pobox.com 00006 * Purpose: Include file defining Virtual File System (VSI) functions, a 00007 * layer over POSIX file and other system services. 00008 * 00009 ****************************************************************************** 00010 * Copyright (c) 1998, Frank Warmerdam 00011 * 00012 * Permission is hereby granted, free of charge, to any person obtaining a 00013 * copy of this software and associated documentation files (the "Software"), 00014 * to deal in the Software without restriction, including without limitation 00015 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 00016 * and/or sell copies of the Software, and to permit persons to whom the 00017 * Software is furnished to do so, subject to the following conditions: 00018 * 00019 * The above copyright notice and this permission notice shall be included 00020 * in all copies or substantial portions of the Software. 00021 * 00022 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 00023 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 00024 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 00025 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 00026 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 00027 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 00028 * DEALINGS IN THE SOFTWARE. 00029 ****************************************************************************/ 00030 00031 #ifndef CPL_VSI_H_INCLUDED 00032 #define CPL_VSI_H_INCLUDED 00033 00034 #include "cpl_port.h" 00054 /* -------------------------------------------------------------------- */ 00055 /* We need access to ``struct stat''. */ 00056 /* -------------------------------------------------------------------- */ 00057 00058 /* Unix */ 00059 #if !defined(_WIN32) && !defined(_WIN32_WCE) 00060 # include <unistd.h> 00061 #endif 00062 00063 /* Windows */ 00064 #if !defined(macos_pre10) && !defined(_WIN32_WCE) 00065 # include <sys/stat.h> 00066 #endif 00067 00068 /* Windows CE */ 00069 #if defined(_WIN32_WCE) 00070 # include <wce_stat.h> 00071 #endif 00072 00073 CPL_C_START 00074 00075 /* ==================================================================== */ 00076 /* stdio file access functions. These may not support large */ 00077 /* files, and don't necessarily go through the virtualization */ 00078 /* API. */ 00079 /* ==================================================================== */ 00080 00081 FILE CPL_DLL * VSIFOpen( const char *, const char * ); 00082 int CPL_DLL VSIFClose( FILE * ); 00083 int CPL_DLL VSIFSeek( FILE *, long, int ); 00084 long CPL_DLL VSIFTell( FILE * ); 00085 void CPL_DLL VSIRewind( FILE * ); 00086 void CPL_DLL VSIFFlush( FILE * ); 00087 00088 size_t CPL_DLL VSIFRead( void *, size_t, size_t, FILE * ); 00089 size_t CPL_DLL VSIFWrite( const void *, size_t, size_t, FILE * ); 00090 char CPL_DLL *VSIFGets( char *, int, FILE * ); 00091 int CPL_DLL VSIFPuts( const char *, FILE * ); 00092 int CPL_DLL VSIFPrintf( FILE *, const char *, ... ) CPL_PRINT_FUNC_FORMAT(2, 3); 00093 00094 int CPL_DLL VSIFGetc( FILE * ); 00095 int CPL_DLL VSIFPutc( int, FILE * ); 00096 int CPL_DLL VSIUngetc( int, FILE * ); 00097 int CPL_DLL VSIFEof( FILE * ); 00098 00099 /* ==================================================================== */ 00100 /* VSIStat() related. */ 00101 /* ==================================================================== */ 00102 00103 typedef struct stat VSIStatBuf; 00104 int CPL_DLL VSIStat( const char *, VSIStatBuf * ); 00105 00106 #ifdef _WIN32 00107 # define VSI_ISLNK(x) ( 0 ) /* N/A on Windows */ 00108 # define VSI_ISREG(x) ((x) & S_IFREG) 00109 # define VSI_ISDIR(x) ((x) & S_IFDIR) 00110 # define VSI_ISCHR(x) ((x) & S_IFCHR) 00111 # define VSI_ISBLK(x) ( 0 ) /* N/A on Windows */ 00112 #else 00113 # define VSI_ISLNK(x) S_ISLNK(x) 00114 # define VSI_ISREG(x) S_ISREG(x) 00115 # define VSI_ISDIR(x) S_ISDIR(x) 00116 # define VSI_ISCHR(x) S_ISCHR(x) 00117 # define VSI_ISBLK(x) S_ISBLK(x) 00118 #endif 00119 00120 /* ==================================================================== */ 00121 /* 64bit stdio file access functions. If we have a big size */ 00122 /* defined, then provide protypes for the large file API, */ 00123 /* otherwise redefine to use the regular api. */ 00124 /* ==================================================================== */ 00125 typedef GUIntBig vsi_l_offset; 00126 00127 /* Make VSIL_STRICT_ENFORCE active in DEBUG builds */ 00128 #ifdef DEBUG 00129 #define VSIL_STRICT_ENFORCE 00130 #endif 00131 00132 #ifdef VSIL_STRICT_ENFORCE 00133 typedef struct _VSILFILE VSILFILE; 00134 #else 00135 typedef FILE VSILFILE; 00136 #endif 00137 00138 VSILFILE CPL_DLL * VSIFOpenL( const char *, const char * ); 00139 int CPL_DLL VSIFCloseL( VSILFILE * ); 00140 int CPL_DLL VSIFSeekL( VSILFILE *, vsi_l_offset, int ); 00141 vsi_l_offset CPL_DLL VSIFTellL( VSILFILE * ); 00142 void CPL_DLL VSIRewindL( VSILFILE * ); 00143 size_t CPL_DLL VSIFReadL( void *, size_t, size_t, VSILFILE * ); 00144 size_t CPL_DLL VSIFWriteL( const void *, size_t, size_t, VSILFILE * ); 00145 int CPL_DLL VSIFEofL( VSILFILE * ); 00146 int CPL_DLL VSIFFlushL( VSILFILE * ); 00147 int CPL_DLL VSIFPrintfL( VSILFILE *, const char *, ... ) CPL_PRINT_FUNC_FORMAT(2, 3); 00148 int CPL_DLL VSIFPutcL( int, VSILFILE * ); 00149 00150 #if defined(VSI_STAT64_T) 00151 typedef struct VSI_STAT64_T VSIStatBufL; 00152 #else 00153 #define VSIStatBufL VSIStatBuf 00154 #endif 00155 00156 int CPL_DLL VSIStatL( const char *, VSIStatBufL * ); 00157 00158 #define VSI_STAT_EXISTS_FLAG 0x1 00159 #define VSI_STAT_NATURE_FLAG 0x2 00160 #define VSI_STAT_SIZE_FLAG 0x4 00161 00162 int CPL_DLL VSIStatExL( const char * pszFilename, VSIStatBufL * psStatBuf, int nFlags ); 00163 00164 int CPL_DLL VSIIsCaseSensitiveFS( const char * pszFilename ); 00165 00166 /* ==================================================================== */ 00167 /* Memory allocation */ 00168 /* ==================================================================== */ 00169 00170 void CPL_DLL *VSICalloc( size_t, size_t ); 00171 void CPL_DLL *VSIMalloc( size_t ); 00172 void CPL_DLL VSIFree( void * ); 00173 void CPL_DLL *VSIRealloc( void *, size_t ); 00174 char CPL_DLL *VSIStrdup( const char * ); 00175 00183 void CPL_DLL *VSIMalloc2( size_t nSize1, size_t nSize2 ); 00184 00192 void CPL_DLL *VSIMalloc3( size_t nSize1, size_t nSize2, size_t nSize3 ); 00193 00194 00195 /* ==================================================================== */ 00196 /* Other... */ 00197 /* ==================================================================== */ 00198 00199 #define CPLReadDir VSIReadDir 00200 char CPL_DLL **VSIReadDir( const char * ); 00201 int CPL_DLL VSIMkdir( const char * pathname, long mode ); 00202 int CPL_DLL VSIRmdir( const char * pathname ); 00203 int CPL_DLL VSIUnlink( const char * pathname ); 00204 int CPL_DLL VSIRename( const char * oldpath, const char * newpath ); 00205 char CPL_DLL *VSIStrerror( int ); 00206 00207 /* ==================================================================== */ 00208 /* Install special file access handlers. */ 00209 /* ==================================================================== */ 00210 void CPL_DLL VSIInstallMemFileHandler(void); 00211 void CPL_DLL VSIInstallLargeFileHandler(void); 00212 void CPL_DLL VSIInstallSubFileHandler(void); 00213 void VSIInstallCurlFileHandler(void); 00214 void VSIInstallGZipFileHandler(void); /* No reason to export that */ 00215 void VSIInstallZipFileHandler(void); /* No reason to export that */ 00216 void VSIInstallStdinHandler(void); /* No reason to export that */ 00217 void VSIInstallStdoutHandler(void); /* No reason to export that */ 00218 void CPL_DLL VSIInstallSparseFileHandler(void); 00219 void VSIInstallTarFileHandler(void); /* No reason to export that */ 00220 void CPL_DLL VSICleanupFileManager(void); 00221 00222 VSILFILE CPL_DLL *VSIFileFromMemBuffer( const char *pszFilename, 00223 GByte *pabyData, 00224 vsi_l_offset nDataLength, 00225 int bTakeOwnership ); 00226 GByte CPL_DLL *VSIGetMemFileBuffer( const char *pszFilename, 00227 vsi_l_offset *pnDataLength, 00228 int bUnlinkAndSeize ); 00229 00230 /* ==================================================================== */ 00231 /* Time quering. */ 00232 /* ==================================================================== */ 00233 00234 unsigned long CPL_DLL VSITime( unsigned long * ); 00235 const char CPL_DLL *VSICTime( unsigned long ); 00236 struct tm CPL_DLL *VSIGMTime( const time_t *pnTime, 00237 struct tm *poBrokenTime ); 00238 struct tm CPL_DLL *VSILocalTime( const time_t *pnTime, 00239 struct tm *poBrokenTime ); 00240 00241 /* -------------------------------------------------------------------- */ 00242 /* the following can be turned on for detailed logging of */ 00243 /* almost all IO calls. */ 00244 /* -------------------------------------------------------------------- */ 00245 #ifdef VSI_DEBUG 00246 00247 #ifndef DEBUG 00248 # define DEBUG 00249 #endif 00250 00251 #include "cpl_error.h" 00252 00253 #define VSIDebug4(f,a1,a2,a3,a4) CPLDebug( "VSI", f, a1, a2, a3, a4 ); 00254 #define VSIDebug3( f, a1, a2, a3 ) CPLDebug( "VSI", f, a1, a2, a3 ); 00255 #define VSIDebug2( f, a1, a2 ) CPLDebug( "VSI", f, a1, a2 ); 00256 #define VSIDebug1( f, a1 ) CPLDebug( "VSI", f, a1 ); 00257 #else 00258 #define VSIDebug4( f, a1, a2, a3, a4 ) {} 00259 #define VSIDebug3( f, a1, a2, a3 ) {} 00260 #define VSIDebug2( f, a1, a2 ) {} 00261 #define VSIDebug1( f, a1 ) {} 00262 #endif 00263 00264 CPL_C_END 00265 00266 #endif /* ndef CPL_VSI_H_INCLUDED */