www.pudn.com > mitab.rar > cpl_vsi.h
/****************************************************************************** * Copyright (c) 1998, Frank Warmerdam * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included * in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER * DEALINGS IN THE SOFTWARE. ****************************************************************************** * * cpl_vsi.h * * Include file defining the Virtual System Interface (VSI) functions. This * should normally be included by all translators using VSI functions for * accessing system services. It is also used by the GDAL core, and can be * used by higher level applications which adhere to VSI use. * * Most VSI functions are direct analogs of Posix C library functions. * VSI exists to allow ``hooking'' these functions to provide application * specific checking, io redirection and so on. * * $Log: cpl_vsi.h,v $ * Revision 1.20 2005/04/12 03:51:11 fwarmerdam * Fixed stat64 problem. * * Revision 1.19 2005/04/12 00:27:39 fwarmerdam * added macos large file support * * Revision 1.18 2003/09/10 19:44:36 warmerda * added VSIStrerrno() * * Revision 1.17 2003/09/08 08:11:40 dron * Added VSIGMTime() and VSILocalTime(). * * Revision 1.16 2003/05/27 20:44:40 warmerda * added VSI io debugging macros * * Revision 1.15 2002/06/17 14:10:14 warmerda * no stat64 on Win32 * * Revision 1.14 2002/06/17 14:00:16 warmerda * segregate VSIStatL() and VSIStatBufL. * * Revision 1.13 2002/06/15 02:13:13 aubin * remove debug test for 64bit compile * * Revision 1.12 2002/06/15 00:07:23 aubin * mods to enable 64bit file i/o * * Revision 1.11 2001/04/30 18:19:06 warmerda * avoid stat on macos_pre10 * * Revision 1.10 2001/01/19 21:16:41 warmerda * expanded tabs * * Revision 1.9 2001/01/03 17:41:44 warmerda * added #define for VSIFFlushL * * Revision 1.8 2001/01/03 16:17:50 warmerda * added large file API * * Revision 1.7 2000/12/14 18:29:48 warmerda * added VSIMkdir * * Revision 1.6 2000/01/25 03:11:03 warmerda * added unlink and mkdir * * Revision 1.5 1999/05/23 02:43:57 warmerda * Added documentation block. * * Revision 1.4 1999/02/25 04:48:11 danmo * Added VSIStat() macros specific to _WIN32 (for MSVC++) * * Revision 1.3 1999/01/28 18:31:25 warmerda * Test on _WIN32 rather than WIN32. It seems to be more reliably defined. * * Revision 1.2 1998/12/04 21:42:57 danmo * Added #ifndef WIN32 arounf #include* * Revision 1.1 1998/12/03 18:26:02 warmerda * New * */ #ifndef CPL_VSI_H_INCLUDED #define CPL_VSI_H_INCLUDED #include "cpl_port.h" /** * \file cpl_vsi.h * * Standard C Covers * * The VSI functions are intended to be hookable aliases for Standard C * I/O, memory allocation and other system functions. They are intended * to allow virtualization of disk I/O so that non file data sources * can be made to appear as files, and so that additional error trapping * and reporting can be interested. The memory access API is aliased * so that special application memory management services can be used. * * Is is intended that each of these functions retains exactly the same * calling pattern as the original Standard C functions they relate to. * This means we don't have to provide custom documentation, and also means * that the default implementation is very simple. */ /* -------------------------------------------------------------------- */ /* We need access to ``struct stat''. */ /* -------------------------------------------------------------------- */ #ifndef _WIN32 # include #endif #if !defined(macos_pre10) # include #endif CPL_C_START /* ==================================================================== */ /* stdio file access functions. */ /* ==================================================================== */ FILE CPL_DLL * VSIFOpen( const char *, const char * ); int CPL_DLL VSIFClose( FILE * ); int CPL_DLL VSIFSeek( FILE *, long, int ); long CPL_DLL VSIFTell( FILE * ); void CPL_DLL VSIRewind( FILE * ); void CPL_DLL VSIFFlush( FILE * ); size_t CPL_DLL VSIFRead( void *, size_t, size_t, FILE * ); size_t CPL_DLL VSIFWrite( void *, size_t, size_t, FILE * ); char CPL_DLL *VSIFGets( char *, int, FILE * ); int CPL_DLL VSIFPuts( const char *, FILE * ); int CPL_DLL VSIFPrintf( FILE *, const char *, ... ); int CPL_DLL VSIFGetc( FILE * ); int CPL_DLL VSIFPutc( int, FILE * ); int CPL_DLL VSIUngetc( int, FILE * ); int CPL_DLL VSIFEof( FILE * ); /* ==================================================================== */ /* VSIStat() related. */ /* ==================================================================== */ typedef struct stat VSIStatBuf; int CPL_DLL VSIStat( const char *, VSIStatBuf * ); #ifdef _WIN32 # define VSI_ISLNK(x) ( 0 ) /* N/A on Windows */ # define VSI_ISREG(x) ((x) & S_IFREG) # define VSI_ISDIR(x) ((x) & S_IFDIR) # define VSI_ISCHR(x) ((x) & S_IFCHR) # define VSI_ISBLK(x) ( 0 ) /* N/A on Windows */ #else # define VSI_ISLNK(x) S_ISLNK(x) # define VSI_ISREG(x) S_ISREG(x) # define VSI_ISDIR(x) S_ISDIR(x) # define VSI_ISCHR(x) S_ISCHR(x) # define VSI_ISBLK(x) S_ISBLK(x) #endif /* ==================================================================== */ /* 64bit stdio file access functions. If we have a big size */ /* defined, then provide protypes for the large file API, */ /* otherwise redefine to use the regular api. */ /* ==================================================================== */ #ifdef VSI_LARGE_API_SUPPORTED typedef GUIntBig vsi_l_offset; FILE CPL_DLL * VSIFOpenL( const char *, const char * ); int CPL_DLL VSIFCloseL( FILE * ); int CPL_DLL VSIFSeekL( FILE *, vsi_l_offset, int ); vsi_l_offset CPL_DLL VSIFTellL( FILE * ); void CPL_DLL VSIRewindL( FILE * ); size_t CPL_DLL VSIFReadL( void *, size_t, size_t, FILE * ); size_t CPL_DLL VSIFWriteL( void *, size_t, size_t, FILE * ); int CPL_DLL VSIFEofL( FILE * ); void CPL_DLL VSIFFlushL( FILE * ); #ifndef WIN32 typedef struct VSI_STAT64_T VSIStatBufL; int CPL_DLL VSIStatL( const char *, VSIStatBufL * ); #else #define VSIStatBufL VSIStatBuf #define VSIStatL VSIStat #endif #else typedef long vsi_l_offset; #define vsi_l_offset long #define VSIFOpenL VSIFOpen #define VSIFCloseL VSIFClose #define VSIFSeekL VSIFSeek #define VSIFTellL VSIFTell #define VSIFRewindL VSIFRewind #define VSIFReadL VSIFRead #define VSIFWriteL VSIFWrite #define VSIFEofL VSIFEof #define VSIFFlushL VSIFFlush #define VSIStatBufL VSIStatBuf #define VSIStatL VSIStat #endif /* ==================================================================== */ /* Memory allocation */ /* ==================================================================== */ void CPL_DLL *VSICalloc( size_t, size_t ); void CPL_DLL *VSIMalloc( size_t ); void CPL_DLL VSIFree( void * ); void CPL_DLL *VSIRealloc( void *, size_t ); char CPL_DLL *VSIStrdup( const char * ); /* ==================================================================== */ /* Other... */ /* ==================================================================== */ int CPL_DLL VSIMkdir( const char * pathname, long mode ); int CPL_DLL VSIRmdir( const char * pathname ); int CPL_DLL VSIUnlink( const char * pathname ); char CPL_DLL *VSIStrerror( int ); /* ==================================================================== */ /* Time quering. */ /* ==================================================================== */ unsigned long CPL_DLL VSITime( unsigned long * ); const char CPL_DLL *VSICTime( unsigned long ); struct tm CPL_DLL *VSIGMTime( const time_t *pnTime, struct tm *poBrokenTime ); struct tm CPL_DLL *VSILocalTime( const time_t *pnTime, struct tm *poBrokenTime ); /* -------------------------------------------------------------------- */ /* the following can be turned on for detailed logging of */ /* almost all IO calls. */ /* -------------------------------------------------------------------- */ #ifdef VSI_DEBUG #ifndef DEBUG # define DEBUG #endif #include "cpl_error.h" #define VSIDebug4(f,a1,a2,a3,a4) CPLDebug( "VSI", f, a1, a2, a3, a4 ); #define VSIDebug3( f, a1, a2, a3 ) CPLDebug( "VSI", f, a1, a2, a3 ); #define VSIDebug2( f, a1, a2 ) CPLDebug( "VSI", f, a1, a2 ); #define VSIDebug1( f, a1 ) CPLDebug( "VSI", f, a1 ); #else #define VSIDebug4( f, a1, a2, a3, a4 ) {} #define VSIDebug3( f, a1, a2, a3 ) {} #define VSIDebug2( f, a1, a2 ) {} #define VSIDebug1( f, a1 ) {} #endif CPL_C_END #endif /* ndef CPL_VSI_H_INCLUDED */