OPeNDAP Hyrax Back End Server (BES) Updated for version 3.8.3

BESFSDir.cc

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00001 // BESFSDir.cc
00002 
00003 // This file is part of bes, A C++ back-end server implementation framework
00004 // for the OPeNDAP Data Access Protocol.
00005 
00006 // Copyright (c) 2004-2009 University Corporation for Atmospheric Research
00007 // Author: Patrick West <pwest@ucar.edu> and Jose Garcia <jgarcia@ucar.edu>
00008 //
00009 // This library is free software; you can redistribute it and/or
00010 // modify it under the terms of the GNU Lesser General Public
00011 // License as published by the Free Software Foundation; either
00012 // version 2.1 of the License, or (at your option) any later version.
00013 //
00014 // This library is distributed in the hope that it will be useful,
00015 // but WITHOUT ANY WARRANTY; without even the implied warranty of
00016 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00017 // Lesser General Public License for more details.
00018 //
00019 // You should have received a copy of the GNU Lesser General Public
00020 // License along with this library; if not, write to the Free Software
00021 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
00022 //
00023 // You can contact University Corporation for Atmospheric Research at
00024 // 3080 Center Green Drive, Boulder, CO 80301
00025 
00026 // (c) COPYRIGHT University Corporation for Atmospheric Research 2004-2005
00027 // Please read the full copyright statement in the file COPYRIGHT_UCAR.
00028 //
00029 // Authors:
00030 //      pwest       Patrick West <pwest@ucar.edu>
00031 //      jgarcia     Jose Garcia <jgarcia@ucar.edu>
00032 
00033 #include <sys/types.h>
00034 #include <sys/stat.h>
00035 #include <dirent.h>
00036 #ifdef WIN32
00037 #include <config.h>  //  for S_ISDIR macro
00038 #endif
00039 #include <stdio.h>
00040 
00041 #include "BESFSDir.h"
00042 #include "BESRegex.h"
00043 #include "BESInternalError.h"
00044 
00045 BESFSDir::BESFSDir(const string &dirName)
00046         : _dirName(dirName),
00047         _fileExpr(""),
00048         _dirLoaded(false)
00049 {}
00050 
00051 BESFSDir::BESFSDir(const string &dirName, const string &fileExpr)
00052         : _dirName(dirName),
00053         _fileExpr(fileExpr),
00054         _dirLoaded(false)
00055 {}
00056 
00057 BESFSDir::BESFSDir(const BESFSDir &copyFrom)
00058         : _dirName(copyFrom._dirName),
00059         _fileExpr(copyFrom._fileExpr),
00060         _dirLoaded(false)
00061 {}
00062 
00063 BESFSDir::~BESFSDir()
00064 {}
00065 
00066 BESFSDir::dirIterator
00067 BESFSDir::beginOfDirList()
00068 {
00069     if (_dirLoaded == false) {
00070         loadDir() ;
00071         _dirLoaded = true ;
00072     }
00073     return _dirList.begin() ;
00074 }
00075 
00076 BESFSDir::dirIterator
00077 BESFSDir::endOfDirList()
00078 {
00079     if (_dirLoaded == false) {
00080         loadDir() ;
00081         _dirLoaded = true ;
00082     }
00083     return _dirList.end() ;
00084 }
00085 
00086 BESFSDir::fileIterator
00087 BESFSDir::beginOfFileList()
00088 {
00089     if (_dirLoaded == false) {
00090         loadDir() ;
00091         _dirLoaded = true ;
00092     }
00093     return _fileList.begin() ;
00094 }
00095 
00096 BESFSDir::fileIterator
00097 BESFSDir::endOfFileList()
00098 {
00099     if (_dirLoaded == false) {
00100         loadDir() ;
00101         _dirLoaded = true ;
00102     }
00103     return _fileList.end() ;
00104 }
00105 
00106 void
00107 BESFSDir::loadDir()
00108 {
00109     DIR * dip;
00110     struct dirent *dit;
00111 
00112     // open a directory stream
00113     // make sure the directory is valid and readable
00114     if( ( dip = opendir( _dirName.c_str() ) ) == NULL )
00115     {
00116         string err_str = "ERROR: failed to open directory '" + _dirName + "'" ;
00117         throw BESInternalError( err_str, __FILE__, __LINE__ ) ;
00118     }
00119     else
00120     {
00121         // read in the files in this directory
00122         // add each filename to the list of filenames
00123         while ((dit = readdir(dip)) != NULL)
00124         {
00125             struct stat buf;
00126             string dirEntry = dit->d_name ;
00127             if (dirEntry != "." && dirEntry != "..") {
00128                 string fullPath = _dirName + "/" + dirEntry ;
00129                 stat(fullPath.c_str(), &buf) ;
00130 
00131                 // look at the mode and determine if this is a filename
00132                 // or a directory name
00133                 if (S_ISDIR(buf.st_mode)) {
00134                     _dirList.push_back(BESFSDir(fullPath)) ;
00135                 }
00136                 else {
00137                     if (_fileExpr != "") {
00138                         BESRegex reg_expr(_fileExpr.c_str()) ;
00139                         int match_ret = reg_expr.match( dirEntry.c_str(),
00140                                                         dirEntry.length() ) ;
00141                         if( match_ret == static_cast<int>(dirEntry.length()) )
00142                         {
00143                             _fileList.push_back(BESFSFile(_dirName, dirEntry));
00144                         }
00145                     }
00146                     else
00147                     {
00148                         _fileList.push_back(BESFSFile(_dirName, dirEntry)) ;
00149                     }
00150                 }
00151             }
00152         }
00153     }
00154 
00155     // close the directory
00156     closedir(dip) ;
00157 }
00158