content: /* ###
   * IP: GHIDRA
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package firmware.common;
  
  import ghidra.app.util.bin.BinaryReader;
  import ghidra.framework.Application;
  import ghidra.util.Msg;
  
  import java.io.BufferedReader;
  import java.io.File;
  import java.io.FileReader;
  import java.io.IOException;
  import java.util.HashMap;
  import java.util.UUID;
  
  /**
   * Various UUID utilities.
   */
  public class UUIDUtils {
  	private static HashMap<UUID, String> guidMap = new HashMap<>();
  
  	static {
  		try {
  			// Read the list of GUIDs to populate the GUID database.
  			File guidDbFile = Application.getModuleDataFile("guids.csv").getFile(true);
  			try (BufferedReader reader = new BufferedReader(new FileReader(guidDbFile))) {
  				for (String line; (line = reader.readLine()) != null;) {
  					String[] parsedLine = line.split(",");
  					guidMap.put(UUID.fromString(parsedLine[0]), parsedLine[1]);
  				}
  			}
  
  			Msg.debug(UUIDUtils.class, "Imported " + guidMap.size() + " GUIDs");
  		} catch (IOException e) {
  			Msg.error(UUIDUtils.class, "Failed to import GUID database");
  		}
  	}
  
  	private UUIDUtils() {}
  
  	/**
  	 * Checks if the specified UUID is present in the UUID database.
  	 *
  	 * @param  uuid the specified UUID
  	 * @return      if a UUID is present in the UUID map
  	 */
  	public static boolean dbContains(UUID uuid) {
  		return guidMap.containsKey(uuid);
  	}
  
  	/**
  	 * Constructs a UUID from a specified BinaryReader.
  	 *
  	 * @param reader the specified BinaryReader
  	 * @return       the constructed UUID
  	 */
  	public static UUID fromBinaryReader(BinaryReader reader) throws IOException {
  		boolean wasReaderLittleEndian = reader.isLittleEndian();
  
  		reader.setLittleEndian(true);
  		long guidData1 = reader.readNextUnsignedInt() << 32;
  		long guidData2 = (reader.readNextUnsignedShort() << 16) & 0xFFFFFFFFL;
  		long guidData3 = reader.readNextUnsignedShort();
  		long uuidMsb = guidData1 | guidData2 | guidData3;
  
  		reader.setLittleEndian(false);
  		long uuidLsb = reader.readNextLong();
  
  		reader.setLittleEndian(wasReaderLittleEndian);
  		return new UUID(uuidMsb, uuidLsb);
  	}
  
  	/**
  	 * Retrieves the name for a specified UUID. If no name is found, a string representation of the
  	 * UUID is returned.
  	 *
  	 * @return the name for the specified UUID
  	 */
  	public static String getName(UUID uuid) {
  		if (guidMap == null || !guidMap.containsKey(uuid)) {
  			return uuid.toString();
  		}
  
  		return guidMap.get(uuid);
  	}
  }
  