void _formatFixed()

in lib/src/intl/number_format.dart [579:661]
57 lines of code
11 McCabe index (conditional complexity)

  void _formatFixed(dynamic number) {
    dynamic integerPart;
    int fractionPart;
    int extraIntegerDigits;
    var fractionDigits = maximumFractionDigits;

    var power = 0;
    int digitMultiplier;

    if (_isInfinite(number)) {
      integerPart = number.toInt();
      extraIntegerDigits = 0;
      fractionPart = 0;
    } else {
      // We have three possible pieces. First, the basic integer part. If this
      // is a percent or permille, the additional 2 or 3 digits. Finally the
      // fractional part.
      // We avoid multiplying the number because it might overflow if we have
      // a fixed-size integer type, so we extract each of the three as an
      // integer pieces.
      integerPart = _floor(number);
      var fraction = number - integerPart;
      if (fraction.toInt() != 0) {
        // If the fractional part leftover is > 1, presumbly the number
        // was too big for a fixed-size integer, so leave it as whatever
        // it was - the obvious thing is a double.
        integerPart = number;
        fraction = 0;
      }

      /// If we have significant digits, recalculate the number of fraction
      /// digits based on that.
      if (significantDigitsInUse) {
        var significantDigits = this.significantDigits!;
        var integerLength = numberOfIntegerDigits(integerPart);
        var remainingSignificantDigits =
            significantDigits - _multiplierDigits - integerLength;
        fractionDigits = _fractionDigitsAfter(remainingSignificantDigits);
        if (remainingSignificantDigits < 0) {
          // We may have to round.
          var divideBy = pow(10, integerLength - significantDigits);
          integerPart = (integerPart / divideBy).round() * divideBy;
        }
      }
      power = pow(10, fractionDigits) as int;
      digitMultiplier = power * multiplier;

      // Multiply out to the number of decimal places and the percent, then
      // round. For fixed-size integer types this should always be zero, so
      // multiplying is OK.
      var remainingDigits = _round(fraction * digitMultiplier).toInt();
      // However, in rounding we may overflow into the main digits.
      if (remainingDigits >= digitMultiplier) {
        integerPart++;
        remainingDigits -= digitMultiplier;
      }
      // Separate out the extra integer parts from the fraction part.
      extraIntegerDigits = remainingDigits ~/ power;
      fractionPart = remainingDigits % power;
    }

    var integerDigits = _integerDigits(integerPart, extraIntegerDigits);
    var digitLength = integerDigits.length;
    var fractionPresent =
        fractionDigits > 0 && (minimumFractionDigits > 0 || fractionPart > 0);

    if (_hasIntegerDigits(integerDigits)) {
      // Add the padding digits to the regular digits so that we get grouping.
      var padding = '0' * (minimumIntegerDigits - digitLength);
      integerDigits = '$padding$integerDigits';
      digitLength = integerDigits.length;
      for (var i = 0; i < digitLength; i++) {
        _addDigit(integerDigits.codeUnitAt(i));
        _group(digitLength, i);
      }
    } else if (!fractionPresent) {
      // If neither fraction nor integer part exists, just print zero.
      _addZero();
    }

    _decimalSeparator(fractionPresent);
    _formatFractionPart((fractionPart + power).toString());
  }