build/tincan.js
function EUCJPDecoder(options) {
    var fatal = options.fatal;

    // euc-jp's decoder has an associated euc-jp jis0212 flag
    // (initially unset) and euc-jp lead (initially 0x00).
    var /** @type {boolean} */ eucjp_jis0212_flag = false,
        /** @type {number} */ eucjp_lead = 0x00;

    /**
     * @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 euc-jp lead is not 0x00, set
      // euc-jp lead to 0x00, and return error.
      if (bite === end_of_stream && eucjp_lead !== 0x00) {
        eucjp_lead = 0x00;
        return decoderError(fatal);
      }

      // 2. If byte is end-of-stream and euc-jp lead is 0x00, return
      // finished.
      if (bite === end_of_stream && eucjp_lead === 0x00)
        return finished;

      // 3. If euc-jp lead is 0x8E and byte is in the range 0xA1 to
      // 0xDF, set euc-jp lead to 0x00 and return a code point whose
      // value is 0xFF61 + byte − 0xA1.
      if (eucjp_lead === 0x8E && inRange(bite, 0xA1, 0xDF)) {
        eucjp_lead = 0x00;
        return 0xFF61 + bite - 0xA1;
      }

      // 4. If euc-jp lead is 0x8F and byte is in the range 0xA1 to
      // 0xFE, set the euc-jp jis0212 flag, set euc-jp lead to byte,
      // and return continue.
      if (eucjp_lead === 0x8F && inRange(bite, 0xA1, 0xFE)) {
        eucjp_jis0212_flag = true;
        eucjp_lead = bite;
        return null;
      }

      // 5. If euc-jp lead is not 0x00, let lead be euc-jp lead, set
      // euc-jp lead to 0x00, and run these substeps:
      if (eucjp_lead !== 0x00) {
        var lead = eucjp_lead;
        eucjp_lead = 0x00;

        // 1. Let code point be null.
        var code_point = null;

        // 2. If lead and byte are both in the range 0xA1 to 0xFE, set
        // code point to the index code point for (lead − 0xA1) × 94 +
        // byte − 0xA1 in index jis0208 if the euc-jp jis0212 flag is
        // unset and in index jis0212 otherwise.
        if (inRange(lead, 0xA1, 0xFE) && inRange(bite, 0xA1, 0xFE)) {
          code_point = indexCodePointFor(
            (lead - 0xA1) * 94 + (bite - 0xA1),
            index(!eucjp_jis0212_flag ? 'jis0208' : 'jis0212'));
        }

        // 3. Unset the euc-jp jis0212 flag.
        eucjp_jis0212_flag = false;

        // 4. If byte is not in the range 0xA1 to 0xFE, prepend byte
        // to stream.
        if (!inRange(bite, 0xA1, 0xFE))
          stream.prepend(bite);

        // 5. If code point is null, return error.
        if (code_point === null)
          return decoderError(fatal);

        // 6. Return a code point whose value is code point.
        return code_point;
      }

      // 6. If byte is an ASCII byte, return a code point whose value
      // is byte.
      if (isASCIIByte(bite))
        return bite;

      // 7. If byte is 0x8E, 0x8F, or in the range 0xA1 to 0xFE, set
      // euc-jp lead to byte and return continue.
      if (bite === 0x8E || bite === 0x8F || inRange(bite, 0xA1, 0xFE)) {
        eucjp_lead = bite;
        return null;
      }

      // 8. Return error.
      return decoderError(fatal);
    };
  }
function EUCJPDecoder(options) {
    var fatal = options.fatal;

    // euc-jp's decoder has an associated euc-jp jis0212 flag
    // (initially unset) and euc-jp lead (initially 0x00).
    var /** @type {boolean} */ eucjp_jis0212_flag = false,
        /** @type {number} */ eucjp_lead = 0x00;

    /**
     * @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 euc-jp lead is not 0x00, set
      // euc-jp lead to 0x00, and return error.
      if (bite === end_of_stream && eucjp_lead !== 0x00) {
        eucjp_lead = 0x00;
        return decoderError(fatal);
      }

      // 2. If byte is end-of-stream and euc-jp lead is 0x00, return
      // finished.
      if (bite === end_of_stream && eucjp_lead === 0x00)
        return finished;

      // 3. If euc-jp lead is 0x8E and byte is in the range 0xA1 to
      // 0xDF, set euc-jp lead to 0x00 and return a code point whose
      // value is 0xFF61 + byte − 0xA1.
      if (eucjp_lead === 0x8E && inRange(bite, 0xA1, 0xDF)) {
        eucjp_lead = 0x00;
        return 0xFF61 + bite - 0xA1;
      }

      // 4. If euc-jp lead is 0x8F and byte is in the range 0xA1 to
      // 0xFE, set the euc-jp jis0212 flag, set euc-jp lead to byte,
      // and return continue.
      if (eucjp_lead === 0x8F && inRange(bite, 0xA1, 0xFE)) {
        eucjp_jis0212_flag = true;
        eucjp_lead = bite;
        return null;
      }

      // 5. If euc-jp lead is not 0x00, let lead be euc-jp lead, set
      // euc-jp lead to 0x00, and run these substeps:
      if (eucjp_lead !== 0x00) {
        var lead = eucjp_lead;
        eucjp_lead = 0x00;

        // 1. Let code point be null.
        var code_point = null;

        // 2. If lead and byte are both in the range 0xA1 to 0xFE, set
        // code point to the index code point for (lead − 0xA1) × 94 +
        // byte − 0xA1 in index jis0208 if the euc-jp jis0212 flag is
        // unset and in index jis0212 otherwise.
        if (inRange(lead, 0xA1, 0xFE) && inRange(bite, 0xA1, 0xFE)) {
          code_point = indexCodePointFor(
            (lead - 0xA1) * 94 + (bite - 0xA1),
            index(!eucjp_jis0212_flag ? 'jis0208' : 'jis0212'));
        }

        // 3. Unset the euc-jp jis0212 flag.
        eucjp_jis0212_flag = false;

        // 4. If byte is not in the range 0xA1 to 0xFE, prepend byte
        // to stream.
        if (!inRange(bite, 0xA1, 0xFE))
          stream.prepend(bite);

        // 5. If code point is null, return error.
        if (code_point === null)
          return decoderError(fatal);

        // 6. Return a code point whose value is code point.
        return code_point;
      }

      // 6. If byte is an ASCII byte, return a code point whose value
      // is byte.
      if (isASCIIByte(bite))
        return bite;

      // 7. If byte is 0x8E, 0x8F, or in the range 0xA1 to 0xFE, set
      // euc-jp lead to byte and return continue.
      if (bite === 0x8E || bite === 0x8F || inRange(bite, 0xA1, 0xFE)) {
        eucjp_lead = bite;
        return null;
      }

      // 8. Return error.
      return decoderError(fatal);
    };
  }
function EUCJPDecoder ( options ) { var fatal = options . fatal ; // euc-jp's decoder has an associated euc-jp jis0212 flag // (initially unset) and euc-jp lead (initially 0x00). var /** @type {boolean} */ eucjp_jis0212_flag = false , /** @type {number} */ eucjp_lead = 0x00 ; /**
     * @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 euc-jp lead is not 0x00, set // euc-jp lead to 0x00, and return error. if ( bite === end_of_stream && eucjp_lead !== 0x00 ) { eucjp_lead = 0x00 ; return decoderError ( fatal ) ; } // 2. If byte is end-of-stream and euc-jp lead is 0x00, return // finished. if ( bite === end_of_stream && eucjp_lead === 0x00 ) return finished ; // 3. If euc-jp lead is 0x8E and byte is in the range 0xA1 to // 0xDF, set euc-jp lead to 0x00 and return a code point whose // value is 0xFF61 + byte − 0xA1. if ( eucjp_lead === 0x8E && inRange ( bite , 0xA1 , 0xDF ) ) { eucjp_lead = 0x00 ; return 0xFF61 + bite - 0xA1 ; } // 4. If euc-jp lead is 0x8F and byte is in the range 0xA1 to // 0xFE, set the euc-jp jis0212 flag, set euc-jp lead to byte, // and return continue. if ( eucjp_lead === 0x8F && inRange ( bite , 0xA1 , 0xFE ) ) { eucjp_jis0212_flag = true ; eucjp_lead = bite ; return null ; } // 5. If euc-jp lead is not 0x00, let lead be euc-jp lead, set // euc-jp lead to 0x00, and run these substeps: if ( eucjp_lead !== 0x00 ) { var lead = eucjp_lead ; eucjp_lead = 0x00 ; // 1. Let code point be null. var code_point = null ; // 2. If lead and byte are both in the range 0xA1 to 0xFE, set // code point to the index code point for (lead − 0xA1) × 94 + // byte − 0xA1 in index jis0208 if the euc-jp jis0212 flag is // unset and in index jis0212 otherwise. if ( inRange ( lead , 0xA1 , 0xFE ) && inRange ( bite , 0xA1 , 0xFE ) ) { code_point = indexCodePointFor ( ( lead - 0xA1 ) * 94 + ( bite - 0xA1 ) , index ( ! eucjp_jis0212_flag ? 'jis0208' : 'jis0212' ) ) ; } // 3. Unset the euc-jp jis0212 flag. eucjp_jis0212_flag = false ; // 4. If byte is not in the range 0xA1 to 0xFE, prepend byte // to stream. if ( ! inRange ( bite , 0xA1 , 0xFE ) ) stream . prepend ( bite ) ; // 5. If code point is null, return error. if ( code_point === null ) return decoderError ( fatal ) ; // 6. Return a code point whose value is code point. return code_point ; } // 6. If byte is an ASCII byte, return a code point whose value // is byte. if ( isASCIIByte ( bite ) ) return bite ; // 7. If byte is 0x8E, 0x8F, or in the range 0xA1 to 0xFE, set // euc-jp lead to byte and return continue. if ( bite === 0x8E || bite === 0x8F || inRange ( bite , 0xA1 , 0xFE ) ) { eucjp_lead = bite ; return null ; } // 8. Return error. return decoderError ( fatal ) ; } ; }
13.1.1 euc-jp decoder 
@constructor
@implements {Decoder}
@param {{fatal: boolean}} options
13 . 1 . 1 euc - jp decoder