send/app/qrcode.js

//---------------------------------------------------------------------
//
// QR Code Generator for JavaScript
//
// Copyright (c) 2009 Kazuhiko Arase
//
// URL: http://www.d-project.com/
//
// Licensed under the MIT license:
//  http://www.opensource.org/licenses/mit-license.php
//
// The word 'QR Code' is registered trademark of
// DENSO WAVE INCORPORATED
//  http://www.denso-wave.com/qrcode/faqpatent-e.html
//
//---------------------------------------------------------------------

var qrcode = (function() {
  //---------------------------------------------------------------------
  // qrcode
  //---------------------------------------------------------------------

  /**
   * qrcode
   * @param typeNumber 1 to 40
   * @param errorCorrectionLevel 'L','M','Q','H'
   */
  var qrcode = function(typeNumber, errorCorrectionLevel) {
    var PAD0 = 0xec;
    var PAD1 = 0x11;

    var _typeNumber = typeNumber;
    var _errorCorrectionLevel = QRErrorCorrectionLevel[errorCorrectionLevel];
    var _modules = null;
    var _moduleCount = 0;
    var _dataCache = null;
    var _dataList = [];

    var _this = {};

    var makeImpl = function(test, maskPattern) {
      _moduleCount = _typeNumber * 4 + 17;
      _modules = (function(moduleCount) {
        var modules = new Array(moduleCount);
        for (var row = 0; row < moduleCount; row += 1) {
          modules[row] = new Array(moduleCount);
          for (var col = 0; col < moduleCount; col += 1) {
            modules[row][col] = null;
          }
        }
        return modules;
      })(_moduleCount);

      setupPositionProbePattern(0, 0);
      setupPositionProbePattern(_moduleCount - 7, 0);
      setupPositionProbePattern(0, _moduleCount - 7);
      setupPositionAdjustPattern();
      setupTimingPattern();
      setupTypeInfo(test, maskPattern);

      if (_typeNumber >= 7) {
        // setupTypeNumber(test);
      }

      if (_dataCache == null) {
        _dataCache = createData(_typeNumber, _errorCorrectionLevel, _dataList);
      }

      mapData(_dataCache, maskPattern);
    };

    var setupPositionProbePattern = function(row, col) {
      for (var r = -1; r <= 7; r += 1) {
        if (row + r <= -1 || _moduleCount <= row + r) continue;

        for (var c = -1; c <= 7; c += 1) {
          if (col + c <= -1 || _moduleCount <= col + c) continue;

          if (
            (0 <= r && r <= 6 && (c == 0 || c == 6)) ||
            (0 <= c && c <= 6 && (r == 0 || r == 6)) ||
            (2 <= r && r <= 4 && 2 <= c && c <= 4)
          ) {
            _modules[row + r][col + c] = true;
          } else {
            _modules[row + r][col + c] = false;
          }
        }
      }
    };

    var getBestMaskPattern = function() {
      var minLostPoint = 0;
      var pattern = 0;

      for (var i = 0; i < 8; i += 1) {
        makeImpl(true, i);

        var lostPoint = QRUtil.getLostPoint(_this);

        if (i == 0 || minLostPoint > lostPoint) {
          minLostPoint = lostPoint;
          pattern = i;
        }
      }

      return pattern;
    };

    var setupTimingPattern = function() {
      for (var r = 8; r < _moduleCount - 8; r += 1) {
        if (_modules[r][6] != null) {
          continue;
        }
        _modules[r][6] = r % 2 == 0;
      }

      for (var c = 8; c < _moduleCount - 8; c += 1) {
        if (_modules[6][c] != null) {
          continue;
        }
        _modules[6][c] = c % 2 == 0;
      }
    };

    var setupPositionAdjustPattern = function() {
      var pos = QRUtil.getPatternPosition(_typeNumber);

      for (var i = 0; i < pos.length; i += 1) {
        for (var j = 0; j < pos.length; j += 1) {
          var row = pos[i];
          var col = pos[j];

          if (_modules[row][col] != null) {
            continue;
          }

          for (var r = -2; r <= 2; r += 1) {
            for (var c = -2; c <= 2; c += 1) {
              if (
                r == -2 ||
                r == 2 ||
                c == -2 ||
                c == 2 ||
                (r == 0 && c == 0)
              ) {
                _modules[row + r][col + c] = true;
              } else {
                _modules[row + r][col + c] = false;
              }
            }
          }
        }
      }
    };

    var setupTypeInfo = function(test, maskPattern) {
      var data = (_errorCorrectionLevel << 3) | maskPattern;
      var bits = QRUtil.getBCHTypeInfo(data);

      // vertical
      for (var i = 0; i < 15; i += 1) {
        var mod = !test && ((bits >> i) & 1) == 1;

        if (i < 6) {
          _modules[i][8] = mod;
        } else if (i < 8) {
          _modules[i + 1][8] = mod;
        } else {
          _modules[_moduleCount - 15 + i][8] = mod;
        }
      }

      // horizontal
      for (var i = 0; i < 15; i += 1) {
        var mod = !test && ((bits >> i) & 1) == 1;

        if (i < 8) {
          _modules[8][_moduleCount - i - 1] = mod;
        } else if (i < 9) {
          _modules[8][15 - i - 1 + 1] = mod;
        } else {
          _modules[8][15 - i - 1] = mod;
        }
      }

      // fixed module
      _modules[_moduleCount - 8][8] = !test;
    };

    var mapData = function(data, maskPattern) {
      var inc = -1;
      var row = _moduleCount - 1;
      var bitIndex = 7;
      var byteIndex = 0;
      var maskFunc = QRUtil.getMaskFunction(maskPattern);

      for (var col = _moduleCount - 1; col > 0; col -= 2) {
        if (col == 6) col -= 1;

        while (true) {
          for (var c = 0; c < 2; c += 1) {
            if (_modules[row][col - c] == null) {
              var dark = false;

              if (byteIndex < data.length) {
                dark = ((data[byteIndex] >>> bitIndex) & 1) == 1;
              }

              var mask = maskFunc(row, col - c);

              if (mask) {
                dark = !dark;
              }

              _modules[row][col - c] = dark;
              bitIndex -= 1;

              if (bitIndex == -1) {
                byteIndex += 1;
                bitIndex = 7;
              }
            }
          }

          row += inc;

          if (row < 0 || _moduleCount <= row) {
            row -= inc;
            inc = -inc;
            break;
          }
        }
      }
    };

    var createBytes = function(buffer, rsBlocks) {
      var offset = 0;

      var maxDcCount = 0;
      var maxEcCount = 0;

      var dcdata = new Array(rsBlocks.length);
      var ecdata = new Array(rsBlocks.length);

      for (var r = 0; r < rsBlocks.length; r += 1) {
        var dcCount = rsBlocks[r].dataCount;
        var ecCount = rsBlocks[r].totalCount - dcCount;

        maxDcCount = Math.max(maxDcCount, dcCount);
        maxEcCount = Math.max(maxEcCount, ecCount);

        dcdata[r] = new Array(dcCount);

        for (var i = 0; i < dcdata[r].length; i += 1) {
          dcdata[r][i] = 0xff & buffer.getBuffer()[i + offset];
        }
        offset += dcCount;

        var rsPoly = QRUtil.getErrorCorrectPolynomial(ecCount);
        var rawPoly = qrPolynomial(dcdata[r], rsPoly.getLength() - 1);

        var modPoly = rawPoly.mod(rsPoly);
        ecdata[r] = new Array(rsPoly.getLength() - 1);
        for (var i = 0; i < ecdata[r].length; i += 1) {
          var modIndex = i + modPoly.getLength() - ecdata[r].length;
          ecdata[r][i] = modIndex >= 0 ? modPoly.getAt(modIndex) : 0;
        }
      }

      var totalCodeCount = 0;
      for (var i = 0; i < rsBlocks.length; i += 1) {
        totalCodeCount += rsBlocks[i].totalCount;
      }

      var data = new Array(totalCodeCount);
      var index = 0;

      for (var i = 0; i < maxDcCount; i += 1) {
        for (var r = 0; r < rsBlocks.length; r += 1) {
          if (i < dcdata[r].length) {
            data[index] = dcdata[r][i];
            index += 1;
          }
        }
      }

      for (var i = 0; i < maxEcCount; i += 1) {
        for (var r = 0; r < rsBlocks.length; r += 1) {
          if (i < ecdata[r].length) {
            data[index] = ecdata[r][i];
            index += 1;
          }
        }
      }

      return data;
    };

    var createData = function(typeNumber, errorCorrectionLevel, dataList) {
      var rsBlocks = QRRSBlock.getRSBlocks(typeNumber, errorCorrectionLevel);

      var buffer = qrBitBuffer();

      for (var i = 0; i < dataList.length; i += 1) {
        var data = dataList[i];
        buffer.put(data.getMode(), 4);
        buffer.put(
          data.getLength(),
          QRUtil.getLengthInBits(data.getMode(), typeNumber)
        );
        data.write(buffer);
      }

      // calc num max data.
      var totalDataCount = 0;
      for (var i = 0; i < rsBlocks.length; i += 1) {
        totalDataCount += rsBlocks[i].dataCount;
      }

      if (buffer.getLengthInBits() > totalDataCount * 8) {
        throw 'code length overflow. (' +
          buffer.getLengthInBits() +
          '>' +
          totalDataCount * 8 +
          ')';
      }

      // end code
      if (buffer.getLengthInBits() + 4 <= totalDataCount * 8) {
        buffer.put(0, 4);
      }

      // padding
      while (buffer.getLengthInBits() % 8 != 0) {
        buffer.putBit(false);
      }

      // padding
      while (true) {
        if (buffer.getLengthInBits() >= totalDataCount * 8) {
          break;
        }
        buffer.put(PAD0, 8);

        if (buffer.getLengthInBits() >= totalDataCount * 8) {
          break;
        }
        buffer.put(PAD1, 8);
      }

      return createBytes(buffer, rsBlocks);
    };

    _this.addData = function(data) {
      var newData = qr8BitByte(data);
      _dataList.push(newData);
      _dataCache = null;
    };

    _this.isDark = function(row, col) {
      if (row < 0 || _moduleCount <= row || col < 0 || _moduleCount <= col) {
        throw row + ',' + col;
      }
      return _modules[row][col];
    };

    _this.getModuleCount = function() {
      return _moduleCount;
    };

    _this.make = function() {
      makeImpl(false, getBestMaskPattern());
    };

    _this.createSvgTag = function(cellSize, margin, alt, title) {
      var opts = {};
      if (typeof arguments[0] == 'object') {
        // Called by options.
        opts = arguments[0];
        // overwrite cellSize and margin.
        cellSize = opts.cellSize;
        margin = opts.margin;
        alt = opts.alt;
        title = opts.title;
      }

      cellSize = cellSize || 2;
      margin = typeof margin == 'undefined' ? cellSize * 4 : margin;

      // Compose alt property surrogate
      alt = typeof alt === 'string' ? { text: alt } : alt || {};
      alt.text = alt.text || null;
      alt.id = alt.text ? alt.id || 'qrcode-description' : null;

      // Compose title property surrogate
      title = typeof title === 'string' ? { text: title } : title || {};
      title.text = title.text || null;
      title.id = title.text ? title.id || 'qrcode-title' : null;

      var size = _this.getModuleCount() * cellSize + margin * 2;
      var c,
        mc,
        r,
        mr,
        qrSvg = '',
        rect;

      rect =
        'l' +
        cellSize +
        ',0 0,' +
        cellSize +
        ' -' +
        cellSize +
        ',0 0,-' +
        cellSize +
        'z ';

      qrSvg += '<svg version="1.1" xmlns="http://www.w3.org/2000/svg"';
      qrSvg += !opts.scalable
        ? ' width="' + size + 'px" height="' + size + 'px"'
        : '';
      qrSvg += ' viewBox="0 0 ' + size + ' ' + size + '" ';
      qrSvg += ' preserveAspectRatio="xMinYMin meet"';
      qrSvg +=
        title.text || alt.text
          ? ' role="img" aria-labelledby="' +
            escapeXml([title.id, alt.id].join(' ').trim()) +
            '"'
          : '';
      qrSvg += '>';
      qrSvg += title.text
        ? '<title id="' +
          escapeXml(title.id) +
          '">' +
          escapeXml(title.text) +
          '</title>'
        : '';
      qrSvg += alt.text
        ? '<description id="' +
          escapeXml(alt.id) +
          '">' +
          escapeXml(alt.text) +
          '</description>'
        : '';
      qrSvg += '<rect width="100%" height="100%" fill="white" cx="0" cy="0"/>';
      qrSvg += '<path d="';

      for (r = 0; r < _this.getModuleCount(); r += 1) {
        mr = r * cellSize + margin;
        for (c = 0; c < _this.getModuleCount(); c += 1) {
          if (_this.isDark(r, c)) {
            mc = c * cellSize + margin;
            qrSvg += 'M' + mc + ',' + mr + rect;
          }
        }
      }

      qrSvg += '" stroke="transparent" fill="black"/>';
      qrSvg += '</svg>';

      return qrSvg;
    };

    var escapeXml = function(s) {
      var escaped = '';
      for (var i = 0; i < s.length; i += 1) {
        var c = s.charAt(i);
        switch (c) {
          case '<':
            escaped += '&lt;';
            break;
          case '>':
            escaped += '&gt;';
            break;
          case '&':
            escaped += '&amp;';
            break;
          case '"':
            escaped += '&quot;';
            break;
          default:
            escaped += c;
            break;
        }
      }
      return escaped;
    };

    return _this;
  };

  //---------------------------------------------------------------------
  // qrcode.stringToBytes
  //---------------------------------------------------------------------

  qrcode.stringToBytesFuncs = {
    default: function(s) {
      var bytes = [];
      for (var i = 0; i < s.length; i += 1) {
        var c = s.charCodeAt(i);
        bytes.push(c & 0xff);
      }
      return bytes;
    }
  };

  qrcode.stringToBytes = qrcode.stringToBytesFuncs['default'];

  //---------------------------------------------------------------------
  // QRMode
  //---------------------------------------------------------------------

  var QRMode = {
    MODE_NUMBER: 1 << 0,
    MODE_ALPHA_NUM: 1 << 1,
    MODE_8BIT_BYTE: 1 << 2,
    MODE_KANJI: 1 << 3
  };

  //---------------------------------------------------------------------
  // QRErrorCorrectionLevel
  //---------------------------------------------------------------------

  var QRErrorCorrectionLevel = {
    L: 1,
    M: 0,
    Q: 3,
    H: 2
  };

  //---------------------------------------------------------------------
  // QRMaskPattern
  //---------------------------------------------------------------------

  var QRMaskPattern = {
    PATTERN000: 0,
    PATTERN001: 1,
    PATTERN010: 2,
    PATTERN011: 3,
    PATTERN100: 4,
    PATTERN101: 5,
    PATTERN110: 6,
    PATTERN111: 7
  };

  //---------------------------------------------------------------------
  // QRUtil
  //---------------------------------------------------------------------

  var QRUtil = (function() {
    var PATTERN_POSITION_TABLE = [
      [],
      [6, 18],
      [6, 22],
      [6, 26],
      [6, 30],
      [6, 34],
      [6, 22, 38],
      [6, 24, 42],
      [6, 26, 46]
    ];
    var G15 =
      (1 << 10) |
      (1 << 8) |
      (1 << 5) |
      (1 << 4) |
      (1 << 2) |
      (1 << 1) |
      (1 << 0);
    var G18 =
      (1 << 12) |
      (1 << 11) |
      (1 << 10) |
      (1 << 9) |
      (1 << 8) |
      (1 << 5) |
      (1 << 2) |
      (1 << 0);
    var G15_MASK = (1 << 14) | (1 << 12) | (1 << 10) | (1 << 4) | (1 << 1);

    var _this = {};

    var getBCHDigit = function(data) {
      var digit = 0;
      while (data != 0) {
        digit += 1;
        data >>>= 1;
      }
      return digit;
    };

    _this.getBCHTypeInfo = function(data) {
      var d = data << 10;
      while (getBCHDigit(d) - getBCHDigit(G15) >= 0) {
        d ^= G15 << (getBCHDigit(d) - getBCHDigit(G15));
      }
      return ((data << 10) | d) ^ G15_MASK;
    };

    _this.getBCHTypeNumber = function(data) {
      var d = data << 12;
      while (getBCHDigit(d) - getBCHDigit(G18) >= 0) {
        d ^= G18 << (getBCHDigit(d) - getBCHDigit(G18));
      }
      return (data << 12) | d;
    };

    _this.getPatternPosition = function(typeNumber) {
      return PATTERN_POSITION_TABLE[typeNumber - 1];
    };

    _this.getMaskFunction = function(maskPattern) {
      switch (maskPattern) {
        case QRMaskPattern.PATTERN000:
          return function(i, j) {
            return (i + j) % 2 == 0;
          };
        case QRMaskPattern.PATTERN001:
          return function(i, j) {
            return i % 2 == 0;
          };
        case QRMaskPattern.PATTERN010:
          return function(i, j) {
            return j % 3 == 0;
          };
        case QRMaskPattern.PATTERN011:
          return function(i, j) {
            return (i + j) % 3 == 0;
          };
        case QRMaskPattern.PATTERN100:
          return function(i, j) {
            return (Math.floor(i / 2) + Math.floor(j / 3)) % 2 == 0;
          };
        case QRMaskPattern.PATTERN101:
          return function(i, j) {
            return ((i * j) % 2) + ((i * j) % 3) == 0;
          };
        case QRMaskPattern.PATTERN110:
          return function(i, j) {
            return (((i * j) % 2) + ((i * j) % 3)) % 2 == 0;
          };
        case QRMaskPattern.PATTERN111:
          return function(i, j) {
            return (((i * j) % 3) + ((i + j) % 2)) % 2 == 0;
          };

        default:
          throw 'bad maskPattern:' + maskPattern;
      }
    };

    _this.getErrorCorrectPolynomial = function(errorCorrectLength) {
      var a = qrPolynomial([1], 0);
      for (var i = 0; i < errorCorrectLength; i += 1) {
        a = a.multiply(qrPolynomial([1, QRMath.gexp(i)], 0));
      }
      return a;
    };

    _this.getLengthInBits = function(mode, type) {
      if (1 <= type && type < 10) {
        // 1 - 9

        switch (mode) {
          case QRMode.MODE_NUMBER:
            return 10;
          case QRMode.MODE_ALPHA_NUM:
            return 9;
          case QRMode.MODE_8BIT_BYTE:
            return 8;
          case QRMode.MODE_KANJI:
            return 8;
          default:
            throw 'mode:' + mode;
        }
      } else {
        throw 'type:' + type;
      }
    };

    _this.getLostPoint = function(qrcode) {
      var moduleCount = qrcode.getModuleCount();

      var lostPoint = 0;

      // LEVEL1

      for (var row = 0; row < moduleCount; row += 1) {
        for (var col = 0; col < moduleCount; col += 1) {
          var sameCount = 0;
          var dark = qrcode.isDark(row, col);

          for (var r = -1; r <= 1; r += 1) {
            if (row + r < 0 || moduleCount <= row + r) {
              continue;
            }

            for (var c = -1; c <= 1; c += 1) {
              if (col + c < 0 || moduleCount <= col + c) {
                continue;
              }

              if (r == 0 && c == 0) {
                continue;
              }

              if (dark == qrcode.isDark(row + r, col + c)) {
                sameCount += 1;
              }
            }
          }

          if (sameCount > 5) {
            lostPoint += 3 + sameCount - 5;
          }
        }
      }

      // LEVEL2

      for (var row = 0; row < moduleCount - 1; row += 1) {
        for (var col = 0; col < moduleCount - 1; col += 1) {
          var count = 0;
          if (qrcode.isDark(row, col)) count += 1;
          if (qrcode.isDark(row + 1, col)) count += 1;
          if (qrcode.isDark(row, col + 1)) count += 1;
          if (qrcode.isDark(row + 1, col + 1)) count += 1;
          if (count == 0 || count == 4) {
            lostPoint += 3;
          }
        }
      }

      // LEVEL3

      for (var row = 0; row < moduleCount; row += 1) {
        for (var col = 0; col < moduleCount - 6; col += 1) {
          if (
            qrcode.isDark(row, col) &&
            !qrcode.isDark(row, col + 1) &&
            qrcode.isDark(row, col + 2) &&
            qrcode.isDark(row, col + 3) &&
            qrcode.isDark(row, col + 4) &&
            !qrcode.isDark(row, col + 5) &&
            qrcode.isDark(row, col + 6)
          ) {
            lostPoint += 40;
          }
        }
      }

      for (var col = 0; col < moduleCount; col += 1) {
        for (var row = 0; row < moduleCount - 6; row += 1) {
          if (
            qrcode.isDark(row, col) &&
            !qrcode.isDark(row + 1, col) &&
            qrcode.isDark(row + 2, col) &&
            qrcode.isDark(row + 3, col) &&
            qrcode.isDark(row + 4, col) &&
            !qrcode.isDark(row + 5, col) &&
            qrcode.isDark(row + 6, col)
          ) {
            lostPoint += 40;
          }
        }
      }

      // LEVEL4

      var darkCount = 0;

      for (var col = 0; col < moduleCount; col += 1) {
        for (var row = 0; row < moduleCount; row += 1) {
          if (qrcode.isDark(row, col)) {
            darkCount += 1;
          }
        }
      }

      var ratio =
        Math.abs((100 * darkCount) / moduleCount / moduleCount - 50) / 5;
      lostPoint += ratio * 10;

      return lostPoint;
    };

    return _this;
  })();

  //---------------------------------------------------------------------
  // QRMath
  //---------------------------------------------------------------------

  var QRMath = (function() {
    var EXP_TABLE = new Array(256);
    var LOG_TABLE = new Array(256);

    // initialize tables
    for (var i = 0; i < 8; i += 1) {
      EXP_TABLE[i] = 1 << i;
    }
    for (var i = 8; i < 256; i += 1) {
      EXP_TABLE[i] =
        EXP_TABLE[i - 4] ^
        EXP_TABLE[i - 5] ^
        EXP_TABLE[i - 6] ^
        EXP_TABLE[i - 8];
    }
    for (var i = 0; i < 255; i += 1) {
      LOG_TABLE[EXP_TABLE[i]] = i;
    }

    var _this = {};

    _this.glog = function(n) {
      if (n < 1) {
        throw 'glog(' + n + ')';
      }

      return LOG_TABLE[n];
    };

    _this.gexp = function(n) {
      while (n < 0) {
        n += 255;
      }

      while (n >= 256) {
        n -= 255;
      }

      return EXP_TABLE[n];
    };

    return _this;
  })();

  //---------------------------------------------------------------------
  // qrPolynomial
  //---------------------------------------------------------------------

  function qrPolynomial(num, shift) {
    if (typeof num.length == 'undefined') {
      throw num.length + '/' + shift;
    }

    var _num = (function() {
      var offset = 0;
      while (offset < num.length && num[offset] == 0) {
        offset += 1;
      }
      var _num = new Array(num.length - offset + shift);
      for (var i = 0; i < num.length - offset; i += 1) {
        _num[i] = num[i + offset];
      }
      return _num;
    })();

    var _this = {};

    _this.getAt = function(index) {
      return _num[index];
    };

    _this.getLength = function() {
      return _num.length;
    };

    _this.multiply = function(e) {
      var num = new Array(_this.getLength() + e.getLength() - 1);

      for (var i = 0; i < _this.getLength(); i += 1) {
        for (var j = 0; j < e.getLength(); j += 1) {
          num[i + j] ^= QRMath.gexp(
            QRMath.glog(_this.getAt(i)) + QRMath.glog(e.getAt(j))
          );
        }
      }

      return qrPolynomial(num, 0);
    };

    _this.mod = function(e) {
      if (_this.getLength() - e.getLength() < 0) {
        return _this;
      }

      var ratio = QRMath.glog(_this.getAt(0)) - QRMath.glog(e.getAt(0));

      var num = new Array(_this.getLength());
      for (var i = 0; i < _this.getLength(); i += 1) {
        num[i] = _this.getAt(i);
      }

      for (var i = 0; i < e.getLength(); i += 1) {
        num[i] ^= QRMath.gexp(QRMath.glog(e.getAt(i)) + ratio);
      }

      // recursive call
      return qrPolynomial(num, 0).mod(e);
    };

    return _this;
  }

  //---------------------------------------------------------------------
  // QRRSBlock
  //---------------------------------------------------------------------

  var QRRSBlock = (function() {
    var RS_BLOCK_TABLE = [
      // L

      // 1
      [1, 26, 19],

      // 2
      [1, 44, 34],

      // 3
      [1, 70, 55],

      // 4
      [1, 100, 80],

      // 5
      [1, 134, 108],

      // 6
      [2, 86, 68],

      // 7
      [2, 98, 78],

      // 8
      [2, 121, 97]
    ];

    var qrRSBlock = function(totalCount, dataCount) {
      var _this = {};
      _this.totalCount = totalCount;
      _this.dataCount = dataCount;
      return _this;
    };

    var _this = {};

    var getRsBlockTable = function(typeNumber, errorCorrectionLevel) {
      switch (errorCorrectionLevel) {
        case QRErrorCorrectionLevel.L:
          return RS_BLOCK_TABLE[typeNumber - 1];
        default:
          return undefined;
      }
    };

    _this.getRSBlocks = function(typeNumber, errorCorrectionLevel) {
      var rsBlock = getRsBlockTable(typeNumber, errorCorrectionLevel);

      if (typeof rsBlock == 'undefined') {
        throw 'bad rs block @ typeNumber:' +
          typeNumber +
          '/errorCorrectionLevel:' +
          errorCorrectionLevel;
      }

      var length = rsBlock.length / 3;

      var list = [];

      for (var i = 0; i < length; i += 1) {
        var count = rsBlock[i * 3 + 0];
        var totalCount = rsBlock[i * 3 + 1];
        var dataCount = rsBlock[i * 3 + 2];

        for (var j = 0; j < count; j += 1) {
          list.push(qrRSBlock(totalCount, dataCount));
        }
      }

      return list;
    };

    return _this;
  })();

  //---------------------------------------------------------------------
  // qrBitBuffer
  //---------------------------------------------------------------------

  var qrBitBuffer = function() {
    var _buffer = [];
    var _length = 0;

    var _this = {};

    _this.getBuffer = function() {
      return _buffer;
    };

    _this.getAt = function(index) {
      var bufIndex = Math.floor(index / 8);
      return ((_buffer[bufIndex] >>> (7 - (index % 8))) & 1) == 1;
    };

    _this.put = function(num, length) {
      for (var i = 0; i < length; i += 1) {
        _this.putBit(((num >>> (length - i - 1)) & 1) == 1);
      }
    };

    _this.getLengthInBits = function() {
      return _length;
    };

    _this.putBit = function(bit) {
      var bufIndex = Math.floor(_length / 8);
      if (_buffer.length <= bufIndex) {
        _buffer.push(0);
      }

      if (bit) {
        _buffer[bufIndex] |= 0x80 >>> _length % 8;
      }

      _length += 1;
    };

    return _this;
  };

  //---------------------------------------------------------------------
  // qr8BitByte
  //---------------------------------------------------------------------

  var qr8BitByte = function(data) {
    var _mode = QRMode.MODE_8BIT_BYTE;
    var _data = data;
    var _bytes = qrcode.stringToBytes(data);

    var _this = {};

    _this.getMode = function() {
      return _mode;
    };

    _this.getLength = function(buffer) {
      return _bytes.length;
    };

    _this.write = function(buffer) {
      for (var i = 0; i < _bytes.length; i += 1) {
        buffer.put(_bytes[i], 8);
      }
    };

    return _this;
  };

  //---------------------------------------------------------------------
  // returns qrcode function.

  return qrcode;
})();

(function(factory) {
  if (typeof define === 'function' && define.amd) {
    define([], factory);
  } else if (typeof exports === 'object') {
    module.exports = factory();
  }
})(function() {
  return qrcode;
});