Function qrAlphaNum

src/qrcode.js:1445–1499

(data)

  // ---------------------------------------------------------------------

  var qrAlphaNum = function (data) {
    var _mode = QRMode.MODE_ALPHA_NUM
    var _data = data

    var _this = {}

    _this.getMode = function () {
      return _mode
    }

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

    _this.write = function (buffer) {
      var s = _data

      var i = 0

      while (i + 1 < s.length) {
        buffer.put(
          getCode(s.charAt(i)) * 45 +
          getCode(s.charAt(i + 1)), 11)
        i += 2
      }

      if (i < s.length) {
        buffer.put(getCode(s.charAt(i)), 6)
      }
    }

    var getCode = function (c) {
      if (c >= '0' && c <= '9') {
        return c.charCodeAt(0) - '0'.charCodeAt(0)
      } else if (c >= 'A' && c <= 'Z') {
        return c.charCodeAt(0) - 'A'.charCodeAt(0) + 10
      } else {
        switch (c) {
          case ' ' : return 36
          case '$' : return 37
          case '%' : return 38
          case '*' : return 39
          case '+' : return 40
          case '-' : return 41
          case '.' : return 42
          case '/' : return 43
          case ':' : return 44
          default :
            throw 'illegal char :' + c
        }
      }
    }

    return _this
  }

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