stringencoding/src/EUCKREncoder.js

Encode to/from Typed Array buffers

  /**
   * @constructor
   * @param {{fatal: boolean}} options
   */
  function EUCKREncoder(options) {
    var fatal = options.fatal;
    /**
     * @param {ByteOutputStream} output_byte_stream Output byte stream.
     * @param {CodePointInputStream} code_point_pointer Input stream.
     * @return {number} The last byte emitted.
     */
    this.encode = function(output_byte_stream, code_point_pointer) {
      var code_point = code_point_pointer.get();
      if (code_point === EOF_code_point) {
        return EOF_byte;
      }
      code_point_pointer.offset(1);
      if (inRange(code_point, 0x0000, 0x007F)) {
        return output_byte_stream.emit(code_point);
      }
      var pointer = indexPointerFor(code_point, indexes['euc-kr']);
      if (pointer === null) {
        return encoderError(code_point);
      }
      var lead, trail;
      if (pointer < ((26 + 26 + 126) * (0xC7 - 0x81))) {
        lead = div(pointer, (26 + 26 + 126)) + 0x81;
        trail = pointer % (26 + 26 + 126);
        var offset = trail < 26 ? 0x41 : trail < 26 + 26 ? 0x47 : 0x4D;
        return output_byte_stream.emit(lead, trail + offset);
      }
      pointer = pointer - (26 + 26 + 126) * (0xC7 - 0x81);
      lead = div(pointer, 94) + 0xC7;
      trail = pointer % 94 + 0xA1;
      return output_byte_stream.emit(lead, trail);
    };
  }