Method loadMetadataFromDisk

outofcore/src/outofcore_node_data.cpp:243–321

    ////////////////////////////////////////////////////////////////////////////////

    int 
    OutofcoreOctreeNodeMetadata::loadMetadataFromDisk ()
    {
      if(directory_ != metadata_filename_.parent_path ())
      {
        PCL_ERROR ("directory_ is not set correctly\n");
      }
      
      //if the file to load doesn't exist, return failure
      if (!boost::filesystem::exists (metadata_filename_))
      {
        PCL_ERROR ("[pcl::outofcore::OutofcoreOctreeNodeMetadata] Can not find index metadata at %s.\n", metadata_filename_.c_str ());
        return (0);
      }
      if(boost::filesystem::is_directory (metadata_filename_))
      {
        PCL_ERROR ("[pcl::outofcore::OutofcoreOctreeNodeMetadata] Got a directory, but no oct_idx metadata?\n");
        return (0);
      }

      //load CJSON
      std::vector<char> idx_input;
      std::uintmax_t len = boost::filesystem::file_size (metadata_filename_);
      idx_input.resize (len + 1);
      
      std::ifstream f (metadata_filename_.string ().c_str (), std::ios::in);
      f.read (&(idx_input.front ()), len);
      idx_input.back () = '\0';
      
      //Parse
      std::shared_ptr<cJSON> idx (cJSON_Parse (&(idx_input.front ())), cJSON_Delete);

      cJSON* cjson_outofcore_version = cJSON_GetObjectItem (idx.get (), "version");
      cJSON* cjson_bb_min = cJSON_GetObjectItem (idx.get (), "bb_min");
      cJSON* cjson_bb_max = cJSON_GetObjectItem (idx.get (), "bb_max");
      cJSON* cjson_bin_point_filename = cJSON_GetObjectItem (idx.get (), "bin");

      bool parse_failure = false;
      
      //Sanitize
      if (!cjson_outofcore_version)
      {
        PCL_ERROR ("[pcl::outofcore::OutofcoreOctreeNodeMetadata::%s] Failed to parse \"version\" field of node metadata %s\n", __FUNCTION__, metadata_filename_.c_str ());
        parse_failure = true;
      }
      if (!cjson_bb_min)
      {
        PCL_ERROR ("[pcl::outofcore::OutofcoreOctreeNodeMetadata::%s] Failed to parse \"bb_min\" field of node metadata %s\n", __FUNCTION__, metadata_filename_.c_str ());        
        parse_failure = true;
      }
      if (!cjson_bb_max)
      {
        PCL_ERROR ("[pcl::outofcore::OutofcoreOctreeNodeMetadata::%s] Failed to parse \"bb_max\" field of node metadata %s\n", __FUNCTION__, metadata_filename_.c_str ());
        parse_failure = true;
      }
      if (!cjson_bin_point_filename)
      {
        PCL_ERROR ("[pcl::outofcore::OutofcoreOctreeNodeMetadata::%s] Failed to parse \"bin\" field of node metadata %s\n", __FUNCTION__, metadata_filename_.c_str ());