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cpl_vsi.h

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00001 /******************************************************************************
00002  * Copyright (c) 1998, Frank Warmerdam
00003  *
00004  * Permission is hereby granted, free of charge, to any person obtaining a
00005  * copy of this software and associated documentation files (the "Software"),
00006  * to deal in the Software without restriction, including without limitation
00007  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
00008  * and/or sell copies of the Software, and to permit persons to whom the
00009  * Software is furnished to do so, subject to the following conditions:
00010  *
00011  * The above copyright notice and this permission notice shall be included
00012  * in all copies or substantial portions of the Software.
00013  *
00014  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
00015  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
00016  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
00017  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
00018  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
00019  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
00020  * DEALINGS IN THE SOFTWARE.
00021  ******************************************************************************
00022  *
00023  * cpl_vsi.h
00024  *
00025  * Include file defining the Virtual System Interface (VSI) functions.  This
00026  * should normally be included by all translators using VSI functions for
00027  * accessing system services.  It is also used by the GDAL core, and can be
00028  * used by higher level applications which adhere to VSI use.
00029  *
00030  * Most VSI functions are direct analogs of Posix C library functions.
00031  * VSI exists to allow ``hooking'' these functions to provide application
00032  * specific checking, io redirection and so on. 
00033  * 
00034  * $Log: cpl_vsi_h-source.html,v $
00034  * Revision 1.10  2002/04/16 13:11:48  warmerda
00034  * updated
00034  *
00035  * Revision 1.11  2001/04/30 18:19:06  warmerda
00036  * avoid stat on macos_pre10
00037  *
00038  * Revision 1.10  2001/01/19 21:16:41  warmerda
00039  * expanded tabs
00040  *
00041  * Revision 1.9  2001/01/03 17:41:44  warmerda
00042  * added #define for VSIFFlushL
00043  *
00044  * Revision 1.8  2001/01/03 16:17:50  warmerda
00045  * added large file API
00046  *
00047  * Revision 1.7  2000/12/14 18:29:48  warmerda
00048  * added VSIMkdir
00049  *
00050  * Revision 1.6  2000/01/25 03:11:03  warmerda
00051  * added unlink and mkdir
00052  *
00053  * Revision 1.5  1999/05/23 02:43:57  warmerda
00054  * Added documentation block.
00055  *
00056  * Revision 1.4  1999/02/25 04:48:11  danmo
00057  * Added VSIStat() macros specific to _WIN32 (for MSVC++)
00058  *
00059  * Revision 1.3  1999/01/28 18:31:25  warmerda
00060  * Test on _WIN32 rather than WIN32.  It seems to be more reliably defined.
00061  *
00062  * Revision 1.2  1998/12/04 21:42:57  danmo
00063  * Added #ifndef WIN32 arounf #include <unistd.h>
00064  *
00065  * Revision 1.1  1998/12/03 18:26:02  warmerda
00066  * New
00067  *
00068  */
00069 
00070 #ifndef CPL_VSI_H_INCLUDED
00071 #define CPL_VSI_H_INCLUDED
00072 
00073 #include "cpl_port.h"
00093 /* -------------------------------------------------------------------- */
00094 /*      We need access to ``struct stat''.                              */
00095 /* -------------------------------------------------------------------- */
00096 #ifndef _WIN32
00097 #  include <unistd.h>
00098 #endif
00099 #if !defined(macos_pre10)
00100 #  include <sys/stat.h>
00101 #endif
00102 
00103 CPL_C_START
00104 
00105 /* ==================================================================== */
00106 /*      stdio file access functions.                                    */
00107 /* ==================================================================== */
00108 
00109 FILE CPL_DLL *  VSIFOpen( const char *, const char * );
00110 int CPL_DLL     VSIFClose( FILE * );
00111 int CPL_DLL     VSIFSeek( FILE *, long, int );
00112 long CPL_DLL    VSIFTell( FILE * );
00113 void CPL_DLL    VSIRewind( FILE * );
00114 void CPL_DLL    VSIFFlush( FILE * );
00115 
00116 size_t CPL_DLL  VSIFRead( void *, size_t, size_t, FILE * );
00117 size_t CPL_DLL  VSIFWrite( void *, size_t, size_t, FILE * );
00118 char CPL_DLL   *VSIFGets( char *, int, FILE * );
00119 int CPL_DLL     VSIFPuts( const char *, FILE * );
00120 int CPL_DLL     VSIFPrintf( FILE *, const char *, ... );
00121 
00122 int CPL_DLL     VSIFGetc( FILE * );
00123 int CPL_DLL     VSIFPutc( int, FILE * );
00124 int CPL_DLL     VSIUngetc( int, FILE * );
00125 int CPL_DLL     VSIFEof( FILE * );
00126 
00127 /* ==================================================================== */
00128 /*      64bit stdio file access functions.  If we have a big size       */
00129 /*      defined, then provide protypes for the large file API,          */
00130 /*      otherwise redefine to use the regular api.                      */
00131 /* ==================================================================== */
00132 #ifdef VSI_LARGE_API_SUPPORTED
00133 
00134 typedef GUIntBig vsi_l_offset;
00135 
00136 FILE CPL_DLL *  VSIFOpenL( const char *, const char * );
00137 int CPL_DLL     VSIFCloseL( FILE * );
00138 int CPL_DLL     VSIFSeekL( FILE *, vsi_l_offset, int );
00139 vsi_l_offset CPL_DLL VSIFTellL( FILE * );
00140 void CPL_DLL    VSIRewindL( FILE * );
00141 size_t CPL_DLL  VSIFReadL( void *, size_t, size_t, FILE * );
00142 size_t CPL_DLL  VSIFWriteL( void *, size_t, size_t, FILE * );
00143 int CPL_DLL     VSIFEofL( FILE * );
00144 void CPL_DLL    VSIFFlushL( FILE * );
00145 
00146 #else
00147 
00148 typedef long vsi_l_offset;
00149 
00150 #define vsi_l_offset long
00151 
00152 #define VSIFOpenL      VSIFOpen
00153 #define VSIFCloseL     VSIFClose
00154 #define VSIFSeekL      VSIFSeek
00155 #define VSIFTellL      VSIFTell
00156 #define VSIFRewindL    VSIFRewind
00157 #define VSIFReadL      VSIFRead
00158 #define VSIFWriteL     VSIFWrite
00159 #define VSIFEofL       VSIFEof
00160 #define VSIFFlushL     VSIFFlush
00161 
00162 #endif
00163 
00164 /* ==================================================================== */
00165 /*      VSIStat() related.                                              */
00166 /* ==================================================================== */
00167 
00168 typedef struct stat VSIStatBuf;
00169 int CPL_DLL     VSIStat( const char *, VSIStatBuf * );
00170 
00171 #ifdef _WIN32
00172 #  define VSI_ISLNK(x)  ( 0 )            /* N/A on Windows */
00173 #  define VSI_ISREG(x)  ((x) & S_IFREG)
00174 #  define VSI_ISDIR(x)  ((x) & S_IFDIR)
00175 #  define VSI_ISCHR(x)  ((x) & S_IFCHR)
00176 #  define VSI_ISBLK(x)  ( 0 )            /* N/A on Windows */
00177 #else
00178 #  define VSI_ISLNK(x)  S_ISLNK(x)
00179 #  define VSI_ISREG(x)  S_ISREG(x)
00180 #  define VSI_ISDIR(x)  S_ISDIR(x)
00181 #  define VSI_ISCHR(x)  S_ISCHR(x)
00182 #  define VSI_ISBLK(x)  S_ISBLK(x)
00183 #endif
00184 
00185 /* ==================================================================== */
00186 /*      Memory allocation                                               */
00187 /* ==================================================================== */
00188 
00189 void CPL_DLL   *VSICalloc( size_t, size_t );
00190 void CPL_DLL   *VSIMalloc( size_t );
00191 void CPL_DLL    VSIFree( void * );
00192 void CPL_DLL   *VSIRealloc( void *, size_t );
00193 char CPL_DLL   *VSIStrdup( const char * );
00194 
00195 /* ==================================================================== */
00196 /*      Other...                                                        */
00197 /* ==================================================================== */
00198 
00199 int CPL_DLL VSIMkdir( const char * pathname, long mode );
00200 int CPL_DLL VSIRmdir( const char * pathname );
00201 int CPL_DLL VSIUnlink( const char * pathname );
00202 
00203 CPL_C_END
00204 
00205 #endif /* ndef CPL_VSI_H_INCLUDED */

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