| # Gaudi Framework, version v22r4 |

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# PathResolver.cpp

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    00001 #include "GaudiKernel/PathResolver.h"
    00002 #include "GaudiKernel/System.h"
    00003
    00004 #ifdef WIN32
    00005 // Disable warning
    00006 //   C4996: 'std::copy': Function call with parameters that may be unsafe
    00007 // Probably coming from Boost classification.
    00008 #pragma warning(disable:4996)
    00009 #endif
    00010
    00011 #include <iostream>
    00012 #include <string>
    00013 #include <vector>
    00014 #include <stdlib.h>
    00015
    00016 #include <boost/algorithm/string/split.hpp>
    00017 #include <boost/algorithm/string/classification.hpp>
    00018 #include <boost/filesystem.hpp>
    00019
    00020 namespace bf = boost::filesystem;
    00021 using namespace std;
    00022
    00023 #ifdef _WIN32
    00024   static const char* path_separator = ",;";
    00025 #else
    00026   static const char* path_separator = ",:";
    00027 #endif
    00028
    00029 //
    00031 //
    00032
    00033 namespace System {
    00034
    00035 typedef enum {
    00036   PR_regular_file,
    00037   PR_directory
    00038 } PR_file_type;
    00039
    00040 typedef enum {
    00041   PR_local,
    00042   PR_recursive
    00043 } PR_search_type;
    00044
    00045 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
    00046
    00047 static bool
    00048 PR_find( const bf::path& file, const string& search_list,
    00049          PR_file_type file_type, PathResolver::SearchType search_type,
    00050          string& result ) {
    00051
    00052   bool found(false);
    00053
    00054   // look for file as specified first
    00055
    00056   try {
    00057     if ( ( file_type == PR_regular_file && is_regular_file( file ) ) ||
    00058          ( file_type == PR_directory && is_directory( file ) ) ) {
    00059       result = bf::complete(file).string();
    00060       return true;
    00061     }
    00062   } catch (bf::filesystem_error /*err*/) {
    00063   }
    00064
    00065   // assume that "." is always part of the search path, so check locally first
    00066
    00067   try {
    00068     bf::path local = bf::initial_path() / file;
    00069     if ( ( file_type == PR_regular_file && is_regular_file( local ) ) ||
    00070          ( file_type == PR_directory && is_directory( local ) ) ) {
    00071       result = bf::complete(file).string();
    00072       return true;
    00073     }
    00074   } catch (bf::filesystem_error /*err*/) {
    00075   }
    00076
    00077
    00078   // iterate through search list
    00079   vector<string> spv;
    00080   split(spv, search_list, boost::is_any_of( path_separator), boost::token_compress_on);
    00081   for (vector<string>::const_iterator itr = spv.begin();
    00082        itr != spv.end(); ++itr ) {
    00083
    00084     bf::path fp = *itr / file;
    00085
    00086     try {
    00087       if ( ( file_type == PR_regular_file && is_regular_file( fp ) ) ||
    00088            ( file_type == PR_directory && is_directory( fp ) ) ) {
    00089         result = bf::complete(fp).string();
    00090         return true;
    00091       }
    00092     } catch (bf::filesystem_error /*err*/) {
    00093     }
    00094
    00095
    00096     // if recursive searching requested, drill down
    00097     if (search_type == PathResolver::RecursiveSearch &&
    00098         is_directory( bf::path(*itr) ) ) {
    00099
    00100       bf::recursive_directory_iterator end_itr;
    00101       try {
    00102         for ( bf::recursive_directory_iterator ritr( *itr );
    00103               ritr != end_itr; ++ritr) {
    00104
    00105           // skip if not a directory
    00106           if (! is_directory( bf::path(*ritr) ) ) { continue; }
    00107
    00108           bf::path fp2 = bf::path(*ritr) / file;
    00109           if ( ( file_type == PR_regular_file && is_regular_file( fp2 ) ) ||
    00110                ( file_type == PR_directory && is_directory( fp2 ) ) ) {
    00111             result = bf::complete( fp2 ).string();
    00112             return true;
    00113           }
    00114         }
    00115       } catch (bf::filesystem_error /*err*/) {
    00116       }
    00117     }
    00118
    00119   }
    00120
    00121   return found;
    00122 }
    00123
    00124 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
    00125
    00126 string
    00127 PathResolver::find_file(const std::string& logical_file_name,
    00128               const std::string& search_path,
    00129               SearchType search_type) {
    00130
    00131   std::string path_list;
    00132   System::getEnv(search_path, path_list);
    00133
    00134   return (find_file_from_list (logical_file_name, path_list, search_type));
    00135 }
    00136
    00137 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
    00138
    00139 std::string
    00140 PathResolver::find_file_from_list (const std::string& logical_file_name,
    00141                                    const std::string& search_list,
    00142                                    SearchType search_type)
    00143 {
    00144   std::string result("");
    00145
    00146   bf::path lfn( logical_file_name );
    00147
    00148   /* bool found = */
    00149   PR_find (lfn, search_list, PR_regular_file, search_type, result);
    00150
    00151   // The following functionality was in the original PathResolver, but I believe
    00152   // that it's WRONG. It extracts the filename of the requested item, and searches
    00153   // for that if the preceding search fails. i.e., if you're looking for "B/a.txt",
    00154   // and that fails, it will look for just "a.txt" in the search list.
    00155
    00156   // if (! found && lfn.filename() != lfn ) {
    00157   //   result = "";
    00158   //   PR_find (lfn.filename(), search_list, PR_regular_file, search_type, result);
    00159   // }
    00160
    00161   return (result);
    00162 }
    00163
    00164 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
    00165
    00166 string PathResolver::find_directory (const std::string& logical_file_name,
    00167                                      const std::string& search_path,
    00168                                      SearchType search_type)
    00169 {
    00170   std::string path_list;
    00171   System::getEnv(search_path, path_list);
    00172
    00173   return (find_directory_from_list (logical_file_name, path_list, search_type));
    00174 }
    00175
    00176 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
    00177
    00178 string
    00179 PathResolver::find_directory_from_list (const std::string& logical_file_name,
    00180                                         const std::string& search_list,
    00181                                         SearchType search_type)
    00182 {
    00183   std::string result;
    00184
    00185   if (!PR_find (logical_file_name, search_list, PR_directory, search_type, result))
    00186   {
    00187     result = "";
    00188   }
    00189
    00190   return (result);
    00191 }
    00192
    00193
    00194 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
    00195
    00196 PathResolver::SearchPathStatus
    00197 PathResolver::check_search_path (const std::string& search_path)
    00198 {
    00199   std::string path_list;
    00200   if ( ! System::getEnv(search_path, path_list) )
    00201     return (EnvironmentVariableUndefined);
    00202
    00203   vector<string> spv;
    00204   boost::split( spv, path_list, boost::is_any_of( path_separator ), boost::token_compress_on);
    00205   vector<string>::iterator itr=spv.begin();
    00206
    00207   try {
    00208     for (; itr!= spv.end(); ++itr) {
    00209       bf::path pp(*itr);
    00210       if (!is_directory(pp)) {
    00211         return (UnknownDirectory);
    00212       }
    00213     }
    00214   } catch(bf::filesystem_error /*err*/) {
    00215     return (UnknownDirectory);
    00216   }
    00217
    00218   return ( Ok );
    00219 }
    00220
    00221 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
    00222
    00223 std::string PathResolverFindXMLFile (const std::string& logical_file_name)
    00224 {
    00225   return PathResolver::find_file (logical_file_name, "XMLPATH");
    00226 }
    00227
    00228 std::string PathResolverFindDataFile (const std::string& logical_file_name)
    00229 {
    00230   return PathResolver::find_file (logical_file_name, "DATAPATH");
    00231 }
    00232
    00233 }  // System namespace

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