/// <summary>
/// Converts a provided <see cref="NumeralString"/> to a <see cref="BitString"/>.
///
/// Numerals within the <see cref="NumeralString"/> are int (16 bits) and are converted
/// to bits and concatenated onto a <see cref="BitString"/> then returned.
/// </summary>
/// <param name="numeralString">The <see cref="NumeralString"/> to convert.</param>
/// <returns>The <see cref="BitString"/> representation of a <see cref="NumeralString"/>.</returns>
public static BitString ToBitString(NumeralString numeralString)
{
var bs = new BitString(0);
foreach (var number in numeralString.Numbers)
{
bs = bs.ConcatenateBits(BitString.To32BitString(number).GetLeastSignificantBits(16));
}
return(bs);
}
/// <summary>
/// Given a <see cref="NumeralString"/> and alphabet, ensure the values within the <see cref="NumeralString"/> are valid given the alphabet.
/// </summary>
/// <param name="alphabet"></param>
/// <param name="numeralString"></param>
/// <returns></returns>
public static bool IsNumeralStringValidWithAlphabet(string alphabet, NumeralString numeralString)
{
if (!IsAlphabetValid(alphabet))
{
return(false);
}
var maxValueFromNumeralString = numeralString.Numbers.Max();
if (maxValueFromNumeralString > alphabet.Length)
{
return(false);
}
return(true);
}
/// <summary>
/// Converts the provided <see cref="NumeralString"/> into its alphabet representation.
/// </summary>
/// <param name="alphabet">The alphabet to use for the conversion process.</param>
/// <param name="radix">The base.</param>
/// <param name="numeralStringToConvert">The <see cref="NumeralString"/> to convert to its alphabet representation.</param>
/// <returns>The string that represents the <see cref="NumeralString"/> converted to it's alphabet.</returns>
public static string ToAlphabetString(string alphabet, int radix, NumeralString numeralStringToConvert)
{
if (!IsNumeralStringValidWithAlphabet(alphabet, numeralStringToConvert))
{
return(null);
}
if (alphabet.Length != radix)
{
return(null);
}
var sb = new StringBuilder();
foreach (var number in numeralStringToConvert.Numbers)
{
sb.Append(alphabet[number]);
}
return(sb.ToString());
}
