operator / method

dynamic operator /(Object other)

Divides this decimal by other. Division by zero returns a non-finite numeric value so calculated field validation can report the error instead of failing during calculation.

Implementation

dynamic operator /(Object other) {
  final right = _coerceOperand(other, operation: '/');
  if (right.scaledValue == BigInt.zero) {
    if (scaledValue == BigInt.zero) {
      return double.nan;
    }
    return scaledValue.isNegative ? double.negativeInfinity : double.infinity;
  }

  final resultScale = _max3(scale, right.scale, 12);
  final numerator = scaledValue * _pow10(right.scale + resultScale);
  final denominator = right.scaledValue * _pow10(scale);
  final negative =
      (numerator.isNegative && !denominator.isNegative) ||
      (!numerator.isNegative && denominator.isNegative);
  final absNumerator = numerator.abs();
  final absDenominator = denominator.abs();
  final quotient = absNumerator ~/ absDenominator;
  final remainder = absNumerator % absDenominator;
  final rounded = remainder * BigInt.from(2) >= absDenominator
      ? quotient + BigInt.one
      : quotient;
  return FdcDecimal.fromScaled(
    negative ? -rounded : rounded,
    scale: resultScale,
  );
}