Method decodeChars

src/gnu/zip/ZipFile.java:722–751

Decode chars from byte buffer using UTF8 encoding. This operation is performance-critical since a jar file contains a large number of strings for the name of each file in the archive. This routine therefore avoids using the expensive utf8Decoder when decoding is straightforward. @param buffer the

(byte[] buffer, int pos, int length)

     * @return a String that contains the decoded characters.
     */
    private String decodeChars(byte[] buffer, int pos, int length)
      throws IOException
    {
      String result;
      int i=length - 1;
      while ((i >= 0) && (buffer[i] <= 0x7f))
        {
          i--;
        }
      if (i < 0)
        {
          result = stringFromSubarray(buffer, 0, pos, length);
        }
      else
        {
          ByteBuffer bufferBuffer = ByteBuffer.wrap(buffer, pos, length);
//          if (utf8Decoder == null)
//            utf8Decoder = UTF8CHARSET.newDecoder();
//          utf8Decoder.reset();
//          char [] characters = utf8Decoder.decode(bufferBuffer).array();
//          char [] characters = utf8Decoder.decode(bufferBuffer).array();
          
          ByteArrayInputStream in = new ByteArrayInputStream(buffer);
          AlbiteStreamReader r =
                  new AlbiteStreamReader(in, Encodings.UTF_8);
          char[] characters = r.read(buffer.length);
          result = String.valueOf(characters);
        }
      return result;
    }

    String readString(int length) throws IOException
    {