00001 /****************************************************************************** 00002 * $Id: cpl_vsi_private.h,v 1.4 2005/09/15 18:39:00 fwarmerdam Exp $ 00003 * 00004 * Project: VSI Virtual File System 00005 * Purpose: Private declarations for classes related to the virtual filesystem 00006 * Author: Frank Warmerdam, warmerdam@pobox.com 00007 * 00008 ****************************************************************************** 00009 * Copyright (c) 2005, Frank Warmerdam <warmerdam@pobox.com> 00010 * 00011 * Permission is hereby granted, free of charge, to any person obtaining a 00012 * copy of this software and associated documentation files (the "Software"), 00013 * to deal in the Software without restriction, including without limitation 00014 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 00015 * and/or sell copies of the Software, and to permit persons to whom the 00016 * Software is furnished to do so, subject to the following conditions: 00017 * 00018 * The above copyright notice and this permission notice shall be included 00019 * in all copies or substantial portions of the Software. 00020 * 00021 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 00022 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 00023 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 00024 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 00025 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 00026 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 00027 * DEALINGS IN THE SOFTWARE. 00028 ****************************************************************************** 00029 * 00030 * $Log: cpl_vsi_private.h,v $ 00031 * Revision 1.4 2005/09/15 18:39:00 fwarmerdam 00032 * fixedup filemanager cleanup 00033 * 00034 * Revision 1.3 2005/09/13 15:17:52 dron 00035 * Unneeded semicolon removed. 00036 * 00037 * Revision 1.2 2005/09/13 15:16:44 dron 00038 * Added virtual destructor to VSIVirtualHandle and VSIFilesystemHandler classes. 00039 * 00040 * Revision 1.1 2005/09/11 18:00:49 fwarmerdam 00041 * New 00042 * 00043 */ 00044 00045 #ifndef CPL_VSI_VIRTUAL_H_INCLUDED 00046 #define CPL_VSI_VIRTUAL_H_INCLUDED 00047 00048 #include "cpl_vsi.h" 00049 00050 #include <map> 00051 #include <vector> 00052 #include <string> 00053 00054 /************************************************************************/ 00055 /* VSIVirtualHandle */ 00056 /************************************************************************/ 00057 00058 class VSIVirtualHandle { 00059 public: 00060 virtual int Seek( vsi_l_offset nOffset, int nWhence ) = 0; 00061 virtual vsi_l_offset Tell() = 0; 00062 virtual size_t Read( void *pBuffer, size_t nSize, size_t nMemb ) = 0; 00063 virtual size_t Write( void *pBuffer, size_t nSize, size_t nMemb ) = 0; 00064 virtual int Eof() = 0; 00065 virtual int Flush() {return 0;} 00066 virtual int Close() = 0; 00067 virtual ~VSIVirtualHandle() { } 00068 }; 00069 00070 /************************************************************************/ 00071 /* VSIFilesystemHandler */ 00072 /************************************************************************/ 00073 00074 class VSIFilesystemHandler { 00075 00076 public: 00077 virtual VSIVirtualHandle *Open( const char *pszFilename, 00078 const char *pszAccess) = 0; 00079 virtual int Stat( const char *pszFilename, VSIStatBufL *pStatBuf) = 0; 00080 virtual int Unlink( const char *pszFilename ) 00081 { errno=ENOENT; return -1; } 00082 virtual int Mkdir( const char *pszDirname, long nMode ) 00083 { errno=ENOENT; return -1; } 00084 virtual int Rmdir( const char *pszDirname ) 00085 { errno=ENOENT; return -1; } 00086 virtual char **ReadDir( const char *pszDirname ) 00087 { return NULL; } 00088 virtual ~VSIFilesystemHandler() {} 00089 }; 00090 00091 /************************************************************************/ 00092 /* VSIFileManager */ 00093 /************************************************************************/ 00094 00095 class VSIFileManager 00096 { 00097 private: 00098 VSIFilesystemHandler *poDefaultHandler; 00099 std::map<std::string,VSIFilesystemHandler *> oHandlers; 00100 00101 VSIFileManager(); 00102 00103 static VSIFileManager *Get(); 00104 00105 public: 00106 ~VSIFileManager(); 00107 00108 static VSIFilesystemHandler *GetHandler( const char * ); 00109 static void InstallHandler( std::string osPrefix, 00110 VSIFilesystemHandler * ); 00111 static void RemoveHandler( std::string osPrefix ); 00112 }; 00113 00114 #endif /* ndef CPL_VSI_VIRTUAL_H_INCLUDED */