/// <summary>
/// Returns lengths of paths that are needed to encode exactly <paramref name="symbolCount"/> symbols.
/// If <paramref name="symbolCount"/> equals 4, another bit is consumed from the <paramref name="reader"/> to determine the correct lengths.
/// </summary>
private static byte[] DetermineSimpleCodeLengths(IMarkedBitReader reader, int symbolCount)
{
return(symbolCount switch {
1 => new byte[] { 0 },
2 => new byte[] { 1, 1 },
3 => new byte[] { 1, 2, 2 },
4 => reader.NextBit("tree-select") ? new byte[] { 1, 2, 3, 3 } : new byte[] { 2, 2, 2, 2 },
_ => throw new ArgumentOutOfRangeException(nameof(symbolCount), "The amount of symbols in a simple code must be in the range [1; 4]."),
});
// Marking overloads
public static bool NextBit(this IMarkedBitReader reader, string name)
{
reader.MarkStart();
bool result = reader.NextBit();
reader.MarkEndValue(name, result);
return(result);
}
