public IEnumerable <Nabe> Encode()
{
while (stream.Peek() > 0)
{
foreach (var b in Encoding.UTF8.GetBytes(stream.ReadLine() + Environment.NewLine))
{
var val = b;
yield return(new Nabe((BaseNabe)(val % 3)));
do
{
yield return(Wbase59.ToNabe(val % Max));
val /= Max;
} while (val >= Max);
yield return(Wbase59.ToNabe(val));
}
}
}
/// <summary>
/// デコード本体
/// </summary>
/// <returns></returns>
public IEnumerable <byte> Decode()
{
var nextMod = 0;
var stack = new Stack <int>();
var encoding = new UnicodeEncoding(true, false);
while (stream.Peek() > 0)
{
for (var item = StringInfo.GetTextElementEnumerator(stream.ReadLine() ?? string.Empty);
item.MoveNext();)
{
var bytes = encoding.GetBytes(item.GetTextElement());
var nextNabe = Nabe.Parse(bytes.AsSpan());
if (nextNabe.Position is null)
{
if (stack.Any())
{
yield return((byte)Aggregate(stack, nextMod));
}
nextMod = (int)nextNabe.Base;
}
else
{
stack.Push(Wbase59.ToValue(nextNabe));
}
}
if (!stack.Any())
{
continue;
}
yield return((byte)Aggregate(stack, nextMod));
}
}