00001 /****************************************************************************** 00002 * $Id: cpl_vsi_virtual.h 15257 2008-08-30 21:15:54Z mloskot $ 00003 * 00004 * Project: VSI Virtual File System 00005 * Purpose: Declarations for classes related to the virtual filesystem. 00006 * These would only be normally required by applications implmenting 00007 * their own virtual file system classes which should be rare. 00008 * The class interface may be fragile through versions. 00009 * Author: Frank Warmerdam, warmerdam@pobox.com 00010 * 00011 ****************************************************************************** 00012 * Copyright (c) 2005, Frank Warmerdam <warmerdam@pobox.com> 00013 * 00014 * Permission is hereby granted, free of charge, to any person obtaining a 00015 * copy of this software and associated documentation files (the "Software"), 00016 * to deal in the Software without restriction, including without limitation 00017 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 00018 * and/or sell copies of the Software, and to permit persons to whom the 00019 * Software is furnished to do so, subject to the following conditions: 00020 * 00021 * The above copyright notice and this permission notice shall be included 00022 * in all copies or substantial portions of the Software. 00023 * 00024 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 00025 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 00026 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 00027 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 00028 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 00029 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 00030 * DEALINGS IN THE SOFTWARE. 00031 ****************************************************************************/ 00032 00033 #ifndef CPL_VSI_VIRTUAL_H_INCLUDED 00034 #define CPL_VSI_VIRTUAL_H_INCLUDED 00035 00036 #include "cpl_vsi.h" 00037 00038 #if defined(WIN32CE) 00039 # include "cpl_wince.h" 00040 # include <wce_errno.h> 00041 # pragma warning(disable:4786) /* Remove annoying warnings in eVC++ and VC++ 6.0 */ 00042 #endif 00043 00044 #include <map> 00045 #include <vector> 00046 #include <string> 00047 00048 /************************************************************************/ 00049 /* VSIVirtualHandle */ 00050 /************************************************************************/ 00051 00052 class CPL_DLL VSIVirtualHandle { 00053 public: 00054 virtual int Seek( vsi_l_offset nOffset, int nWhence ) = 0; 00055 virtual vsi_l_offset Tell() = 0; 00056 virtual size_t Read( void *pBuffer, size_t nSize, size_t nMemb ) = 0; 00057 virtual size_t Write( const void *pBuffer, size_t nSize,size_t nMemb)=0; 00058 virtual int Eof() = 0; 00059 virtual int Flush() {return 0;} 00060 virtual int Close() = 0; 00061 virtual ~VSIVirtualHandle() { } 00062 }; 00063 00064 /************************************************************************/ 00065 /* VSIFilesystemHandler */ 00066 /************************************************************************/ 00067 00068 class CPL_DLL VSIFilesystemHandler { 00069 00070 public: 00071 00072 virtual ~VSIFilesystemHandler() {} 00073 00074 virtual VSIVirtualHandle *Open( const char *pszFilename, 00075 const char *pszAccess) = 0; 00076 virtual int Stat( const char *pszFilename, VSIStatBufL *pStatBuf) = 0; 00077 virtual int Unlink( const char *pszFilename ) 00078 { errno=ENOENT; return -1; } 00079 virtual int Mkdir( const char *pszDirname, long nMode ) 00080 { errno=ENOENT; return -1; } 00081 virtual int Rmdir( const char *pszDirname ) 00082 { errno=ENOENT; return -1; } 00083 virtual char **ReadDir( const char *pszDirname ) 00084 { return NULL; } 00085 virtual int Rename( const char *oldpath, const char *newpath ) 00086 { errno=ENOENT; return -1; } 00087 }; 00088 00089 /************************************************************************/ 00090 /* VSIFileManager */ 00091 /************************************************************************/ 00092 00093 class CPL_DLL VSIFileManager 00094 { 00095 private: 00096 VSIFilesystemHandler *poDefaultHandler; 00097 std::map<std::string, VSIFilesystemHandler *> oHandlers; 00098 00099 VSIFileManager(); 00100 00101 static VSIFileManager *Get(); 00102 00103 public: 00104 ~VSIFileManager(); 00105 00106 static VSIFilesystemHandler *GetHandler( const char * ); 00107 static void InstallHandler( const std::string& osPrefix, 00108 VSIFilesystemHandler * ); 00109 static void RemoveHandler( const std::string& osPrefix ); 00110 }; 00111 00112 #endif /* ndef CPL_VSI_VIRTUAL_H_INCLUDED */
1.5.7.1.