Method ZipFile

classpath/java/util/zip/ZipFile.java:27–56

(String name)

  private final Map<String,Integer> index = new HashMap();

  public ZipFile(String name) throws IOException {
    file = new RandomAccessFile(name, "r");
    window = new Window(file, 4096);
    
    int fileLength = (int) file.length();
    int pointer = fileLength - 22;
    byte[] magic = new byte[] { 0x50, 0x4B, 0x05, 0x06 };
    while (pointer > 0) {
      if (equal(window.data, window.seek(pointer, magic.length),
                magic, 0, magic.length))
      {
        pointer = directoryOffset(window, pointer);

        magic = new byte[] { 0x50, 0x4B, 0x01, 0x02 };
        while (pointer < fileLength) {
          if (equal(window.data, window.seek(pointer, magic.length),
                    magic, 0, magic.length))
          {
            index.put(entryName(window, pointer), pointer);
            pointer = entryEnd(window, pointer);
          } else {
            pointer = fileLength;
          }
        }
        pointer = 0;
      } else {
        -- pointer;
      }
    }
  }

  public ZipFile(File file) throws IOException {
    this(file.getAbsolutePath());