public StringFormatOptions(BigFloat number, NumberFormatInfo nfi)
{
Number = number;
NuberFormatInfo = nfi;
}
private void Normalize()
{
if (DigitsPart.IsVoid())
{
return;
}
if (UnchangedRounding || Exponent > DigitsPart.Length)
{
return;
}
var max = _digits[Base];
var last = DigitsPart.TakeLast(2);
if (last.Length < 2)
{
return;
}
var exp = Exponent;
string alt;
if (last[1] != '0' && last[1] != max)
{
last = last.TakeFirst();
}
if (last[0] == '0')
{
alt = DigitsPart.SkipLast().TrimEnd('0');
}
else if (last[0] == max)
{
alt = DigitsPart.SkipLast().TrimEnd(max);
if (alt.Length == 0)
{
alt = "1";
exp = Exponent + 1;
}
else if (last[0] == max)
{
var c = alt.TakeLast()[0];
max = _digits[_position[c] + 1];
alt = $"{(alt.Length > 1 ? alt.Substring(0, alt.Length - 1) : "")}{max}";
}
}
else
{
alt = DigitsPart.SkipLast();
}
var check = new BigFloat($"{SignPart}0.{alt}@{(exp >= 0 ? "+" : "-")}{Math.Abs(Exponent)}", Base, Number.Precision);
if (!check.IsEqual(Number))
{
return;
}
if (UnchangedLength)
{
alt = alt.PadRight(DigitsPart.Length, '0');
}
Exponent = exp;
DigitsPart = alt;
Value = $"{SignPart}{DigitsPart}";
}
public static bool IsNegative(BigFloat op) => op?.IsNegative() ?? false;