private static string FormatFixed(BigDouble value, int places)
{
if (places < 0)
{
places = MaxSignificantDigits;
}
if (value.Exponent <= -ExpLimit || IsZero(value.Mantissa))
{
return("0" + (places > 0 ? ".".PadRight(places + 1, '0') : ""));
}
// two cases:
// 1) exponent is 17 or greater: just print out mantissa with the appropriate number of zeroes after it
// 2) exponent is 16 or less: use basic toFixed
if (value.Exponent >= MaxSignificantDigits)
{
// TODO: StringBuilder-optimizable
return(value.Mantissa
.ToString(CultureInfo.InvariantCulture)
.Replace(".", "")
.PadRight((int)value.Exponent + 1, '0')
+ (places > 0 ? ".".PadRight(places + 1, '0') : ""));
}
return(ToFixed(value.ToDouble(), places));
}
private static string FormatGeneral(BigDouble value, int places)
{
if (value.Exponent <= -ExpLimit || IsZero(value.Mantissa))
{
return("0");
}
var format = places > 0 ? $"G{places}" : "G";
if (value.Exponent < 21 && value.Exponent > -7)
{
return(value.ToDouble().ToString(format, new CultureInfo("en-US")));
}
return(value.Mantissa.ToString("F2")
+ "e" + value.Exponent.ToString(new CultureInfo("en-US")));
}
private static string FormatGeneral(BigDouble value, int places)
{
if (value.Exponent <= -ExpLimit || IsZero(value.Mantissa))
{
return("0");
}
var format = places > 0 ? $"G{places}" : "G";
if (value.Exponent < 21 && value.Exponent > -7)
{
return(value.ToDouble().ToString(format, CultureInfo.InvariantCulture));
}
return(value.Mantissa.ToString(format, CultureInfo.InvariantCulture)
+ "E" + (value.Exponent >= 0 ? "+" : "")
+ value.Exponent.ToString(CultureInfo.InvariantCulture));
}