build/tincan.js
function UTF16Decoder(utf16_be, options) {
    var fatal = options.fatal;
    var /** @type {?number} */ utf16_lead_byte = null,
        /** @type {?number} */ utf16_lead_surrogate = null;
    /**
     * @param {Stream} stream The stream of bytes being decoded.
     * @param {number} bite The next byte read from the stream.
     * @return {?(number|!Array.<number>)} The next code point(s)
     *     decoded, or null if not enough data exists in the input
     *     stream to decode a complete code point.
     */
    this.handler = function(stream, bite) {
      // 1. If byte is end-of-stream and either utf-16 lead byte or
      // utf-16 lead surrogate is not null, set utf-16 lead byte and
      // utf-16 lead surrogate to null, and return error.
      if (bite === end_of_stream && (utf16_lead_byte !== null ||
                                utf16_lead_surrogate !== null)) {
        return decoderError(fatal);
      }

      // 2. If byte is end-of-stream and utf-16 lead byte and utf-16
      // lead surrogate are null, return finished.
      if (bite === end_of_stream && utf16_lead_byte === null &&
          utf16_lead_surrogate === null) {
        return finished;
      }

      // 3. If utf-16 lead byte is null, set utf-16 lead byte to byte
      // and return continue.
      if (utf16_lead_byte === null) {
        utf16_lead_byte = bite;
        return null;
      }

      // 4. Let code unit be the result of:
      var code_unit;
      if (utf16_be) {
        // utf-16be decoder flag is set
        //   (utf-16 lead byte << 8) + byte.
        code_unit = (utf16_lead_byte << 8) + bite;
      } else {
        // utf-16be decoder flag is unset
        //   (byte << 8) + utf-16 lead byte.
        code_unit = (bite << 8) + utf16_lead_byte;
      }
      // Then set utf-16 lead byte to null.
      utf16_lead_byte = null;

      // 5. If utf-16 lead surrogate is not null, let lead surrogate
      // be utf-16 lead surrogate, set utf-16 lead surrogate to null,
      // and then run these substeps:
      if (utf16_lead_surrogate !== null) {
        var lead_surrogate = utf16_lead_surrogate;
        utf16_lead_surrogate = null;

        // 1. If code unit is in the range U+DC00 to U+DFFF, return a
        // code point whose value is 0x10000 + ((lead surrogate −
        // 0xD800) << 10) + (code unit − 0xDC00).
        if (inRange(code_unit, 0xDC00, 0xDFFF)) {
          return 0x10000 + (lead_surrogate - 0xD800) * 0x400 +
              (code_unit - 0xDC00);
        }

        // 2. Prepend the sequence resulting of converting code unit
        // to bytes using utf-16be decoder flag to stream and return
        // error.
        stream.prepend(convertCodeUnitToBytes(code_unit, utf16_be));
        return decoderError(fatal);
      }

      // 6. If code unit is in the range U+D800 to U+DBFF, set utf-16
      // lead surrogate to code unit and return continue.
      if (inRange(code_unit, 0xD800, 0xDBFF)) {
        utf16_lead_surrogate = code_unit;
        return null;
      }

      // 7. If code unit is in the range U+DC00 to U+DFFF, return
      // error.
      if (inRange(code_unit, 0xDC00, 0xDFFF))
        return decoderError(fatal);

      // 8. Return code point code unit.
      return code_unit;
    };
  }
function UTF16Decoder(utf16_be, options) {
    var fatal = options.fatal;
    var /** @type {?number} */ utf16_lead_byte = null,
        /** @type {?number} */ utf16_lead_surrogate = null;
    /**
     * @param {Stream} stream The stream of bytes being decoded.
     * @param {number} bite The next byte read from the stream.
     * @return {?(number|!Array.<number>)} The next code point(s)
     *     decoded, or null if not enough data exists in the input
     *     stream to decode a complete code point.
     */
    this.handler = function(stream, bite) {
      // 1. If byte is end-of-stream and either utf-16 lead byte or
      // utf-16 lead surrogate is not null, set utf-16 lead byte and
      // utf-16 lead surrogate to null, and return error.
      if (bite === end_of_stream && (utf16_lead_byte !== null ||
                                utf16_lead_surrogate !== null)) {
        return decoderError(fatal);
      }

      // 2. If byte is end-of-stream and utf-16 lead byte and utf-16
      // lead surrogate are null, return finished.
      if (bite === end_of_stream && utf16_lead_byte === null &&
          utf16_lead_surrogate === null) {
        return finished;
      }

      // 3. If utf-16 lead byte is null, set utf-16 lead byte to byte
      // and return continue.
      if (utf16_lead_byte === null) {
        utf16_lead_byte = bite;
        return null;
      }

      // 4. Let code unit be the result of:
      var code_unit;
      if (utf16_be) {
        // utf-16be decoder flag is set
        //   (utf-16 lead byte << 8) + byte.
        code_unit = (utf16_lead_byte << 8) + bite;
      } else {
        // utf-16be decoder flag is unset
        //   (byte << 8) + utf-16 lead byte.
        code_unit = (bite << 8) + utf16_lead_byte;
      }
      // Then set utf-16 lead byte to null.
      utf16_lead_byte = null;

      // 5. If utf-16 lead surrogate is not null, let lead surrogate
      // be utf-16 lead surrogate, set utf-16 lead surrogate to null,
      // and then run these substeps:
      if (utf16_lead_surrogate !== null) {
        var lead_surrogate = utf16_lead_surrogate;
        utf16_lead_surrogate = null;

        // 1. If code unit is in the range U+DC00 to U+DFFF, return a
        // code point whose value is 0x10000 + ((lead surrogate −
        // 0xD800) << 10) + (code unit − 0xDC00).
        if (inRange(code_unit, 0xDC00, 0xDFFF)) {
          return 0x10000 + (lead_surrogate - 0xD800) * 0x400 +
              (code_unit - 0xDC00);
        }

        // 2. Prepend the sequence resulting of converting code unit
        // to bytes using utf-16be decoder flag to stream and return
        // error.
        stream.prepend(convertCodeUnitToBytes(code_unit, utf16_be));
        return decoderError(fatal);
      }

      // 6. If code unit is in the range U+D800 to U+DBFF, set utf-16
      // lead surrogate to code unit and return continue.
      if (inRange(code_unit, 0xD800, 0xDBFF)) {
        utf16_lead_surrogate = code_unit;
        return null;
      }

      // 7. If code unit is in the range U+DC00 to U+DFFF, return
      // error.
      if (inRange(code_unit, 0xDC00, 0xDFFF))
        return decoderError(fatal);

      // 8. Return code point code unit.
      return code_unit;
    };
  }
function UTF16Decoder ( utf16_be , options ) { var fatal = options . fatal ; var /** @type {?number} */ utf16_lead_byte = null , /** @type {?number} */ utf16_lead_surrogate = null ; /**
     * @param {Stream} stream The stream of bytes being decoded.
     * @param {number} bite The next byte read from the stream.
     * @return {?(number|!Array.<number>)} The next code point(s)
     *     decoded, or null if not enough data exists in the input
     *     stream to decode a complete code point.
     */ this . handler = function ( stream , bite ) { // 1. If byte is end-of-stream and either utf-16 lead byte or // utf-16 lead surrogate is not null, set utf-16 lead byte and // utf-16 lead surrogate to null, and return error. if ( bite === end_of_stream && ( utf16_lead_byte !== null || utf16_lead_surrogate !== null ) ) { return decoderError ( fatal ) ; } // 2. If byte is end-of-stream and utf-16 lead byte and utf-16 // lead surrogate are null, return finished. if ( bite === end_of_stream && utf16_lead_byte === null && utf16_lead_surrogate === null ) { return finished ; } // 3. If utf-16 lead byte is null, set utf-16 lead byte to byte // and return continue. if ( utf16_lead_byte === null ) { utf16_lead_byte = bite ; return null ; } // 4. Let code unit be the result of: var code_unit ; if ( utf16_be ) { // utf-16be decoder flag is set //   (utf-16 lead byte << 8) + byte. code_unit = ( utf16_lead_byte << 8 ) + bite ; } else { // utf-16be decoder flag is unset //   (byte << 8) + utf-16 lead byte. code_unit = ( bite << 8 ) + utf16_lead_byte ; } // Then set utf-16 lead byte to null. utf16_lead_byte = null ; // 5. If utf-16 lead surrogate is not null, let lead surrogate // be utf-16 lead surrogate, set utf-16 lead surrogate to null, // and then run these substeps: if ( utf16_lead_surrogate !== null ) { var lead_surrogate = utf16_lead_surrogate ; utf16_lead_surrogate = null ; // 1. If code unit is in the range U+DC00 to U+DFFF, return a // code point whose value is 0x10000 + ((lead surrogate − // 0xD800) << 10) + (code unit − 0xDC00). if ( inRange ( code_unit , 0xDC00 , 0xDFFF ) ) { return 0x10000 + ( lead_surrogate - 0xD800 ) * 0x400 + ( code_unit - 0xDC00 ) ; } // 2. Prepend the sequence resulting of converting code unit // to bytes using utf-16be decoder flag to stream and return // error. stream . prepend ( convertCodeUnitToBytes ( code_unit , utf16_be ) ) ; return decoderError ( fatal ) ; } // 6. If code unit is in the range U+D800 to U+DBFF, set utf-16 // lead surrogate to code unit and return continue. if ( inRange ( code_unit , 0xD800 , 0xDBFF ) ) { utf16_lead_surrogate = code_unit ; return null ; } // 7. If code unit is in the range U+DC00 to U+DFFF, return // error. if ( inRange ( code_unit , 0xDC00 , 0xDFFF ) ) return decoderError ( fatal ) ; // 8. Return code point code unit. return code_unit ; } ; }
15.2.1 shared utf-16 decoder 
@constructor
@implements {Decoder}
@param {boolean} utf16_be True if big-endian, false if little-endian.
@param {{fatal: boolean}} options
15 . 2 . 1 shared utf - 16 decoder