public static string FromBigInteger(this NumeralSystem system, BigInteger value, int fixedLength = 0, int groupSize = 0, string groupSeparator = " ")
{
var chars = new char[20];
var charcount = 0;
do
{
chars[chars.Length - charcount - 1] = system.GetSymbolFor((int)(value % system.Base));
value = value / system.Base;
charcount++;
if (charcount >= chars.Length)
{
var oldchars = chars;
chars = new char[oldchars.Length + 30];
Array.Copy(oldchars, 0, chars, 30, oldchars.Length);
}
} while (value > 0);
var result = new String(chars, chars.Length - charcount, charcount);
if (result.Length < fixedLength)
{
result = new String(system.GetSymbolFor(0), fixedLength - result.Length) + result;
}
if (result.Length > groupSize && groupSize > 0 && !String.IsNullOrEmpty(groupSeparator))
{
return(String.Join(groupSeparator, result.Chunked(groupSize, true)));
}
return(result);
}
public static BigInteger ParseBigInteger(this NumeralSystem system, string s)
{
s = system.PrepareForParse(s);
var result = new BigInteger();
foreach (var c in s)
{
var value = system.GetValueForSymbol(c);
if (value == -1)
{
continue;
}
result = (result * system.Base) + value;
}
return(result);
}
/// <summary>
/// Converts a value expressed in the current numeral system into another numeral system. Can handle values of any size.
/// </summary>
/// <param name="targetNumeralSystem">The numeral system to convert to.</param>
/// <param name="value">The value expressed in the current numeral system.</param>
/// <param name="fixedLength">If given, result will have at least the given length, padded with '0' symbols on the left.</param>
/// <param name="groupSize">To group symbols together, give a groupSize.</param>
/// <param name="groupSeparator">String to separate groups.</param>
/// <returns>The value converted to the target numeral system.</returns>
public string ConvertBigTo(NumeralSystem targetNumeralSystem, string value, int fixedLength = 0, int groupSize = 0, string groupSeparator = " ")
{
return(targetNumeralSystem.FromBigInteger(this.ParseBigInteger(value), fixedLength, groupSize, groupSeparator));
}
/// <summary>
/// Creates a numeral value.
/// </summary>
public NumeralValue(NumeralSystem system, string value)
{
this.Value = value;
this.System = system;
}
/// <summary>
/// Creates a numeral value.
/// </summary>
public NumeralValue(NumeralSystem system, long value)
: this(system, system.From(value))
{
}