FileFinder.cpp

   1 //
   2 // Copyright 2011 The Android Open Source Project
   3 //
   4
   5 // File Finder implementation.
   6 // Implementation for the functions declared and documented in FileFinder.h
   7
   8 #include <utils/Vector.h>
   9 #include <utils/String8.h>
  10 #include <utils/KeyedVector.h>
  11
  12
  13 #include <iostream>
  14
  15 #include "DirectoryWalker.h"
  16 #include "FileFinder.h"
  17
  18 //#define DEBUG
  19
  20 using android::String8;
  21 using std::cout;
  22 using std::endl;
  23
  24 bool SystemFileFinder::findFiles(String8 basePath, Vector<String8>& extensions,
  25                                  KeyedVector<String8,time_t>& fileStore,
  26                                  DirectoryWalker* dw)
  27 {
  28     // Scan the directory pointed to by basePath
  29     // check files and recurse into subdirectories.
  30     if (!dw->openDir(basePath)) {
  31         return false;
  32     }
  33 #ifdef DEBUG
  34     cout << "FileFinder looking in " << basePath << endl;
  35 #endif // DEBUG
  36     /*
  37      *  Go through all directory entries. Check each file using checkAndAddFile
  38      *  and recurse into sub-directories.
  39      */
  40     struct dirent* entry;
  41     while ((entry = dw->nextEntry()) != NULL) {
  42         String8 entryName(entry->d_name);
  43         if (entry->d_name[0] == '.') // Skip hidden files and directories
  44             continue;
  45
  46         String8 fullPath = basePath.appendPathCopy(entryName);
  47         // If this entry is a directory we'll recurse into it
  48         if (entry->d_type == DT_DIR) {
  49             DirectoryWalker* copy = dw->clone();
  50             findFiles(fullPath, extensions, fileStore,copy);
  51             delete copy;
  52         }
  53
  54         // If this entry is a file, we'll pass it over to checkAndAddFile
  55         if (entry->d_type == DT_REG) {
  56             checkAndAddFile(fullPath,dw->entryStats(),extensions,fileStore);
  57         }
  58     }
  59
  60     // Clean up
  61     dw->closeDir();
  62
  63     return true;
  64 }
  65
  66 void SystemFileFinder::checkAndAddFile(String8 path, const struct stat* stats,
  67                                        Vector<String8>& extensions,
  68                                        KeyedVector<String8,time_t>& fileStore)
  69 {
  70 #ifdef DEBUG
  71     cout << "Checking file " << path << "...";
  72 #endif // DEBUG
  73     // Loop over the extensions, checking for a match
  74     bool done = false;
  75     String8 ext(path.getPathExtension());
  76     ext.toLower();
  77     for (size_t i = 0; i < extensions.size() && !done; ++i) {
  78         String8 ext2 = extensions[i].getPathExtension();
  79         ext2.toLower();
  80         // Compare the extensions. If a match is found, add to storage.
  81         if (ext == ext2) {
  82 #ifdef DEBUG
  83             cout << "Match";
  84 #endif // DEBUG
  85             done = true;
  86             fileStore.add(path,stats->st_mtime);
  87         }
  88     }
  89 #ifdef DEBUG
  90     cout << endl;
  91 #endif //DEBUG
  92 }