public override void Compress(BinaryReader reader, BinaryWriter writer)
{
CodeTable tb = new CodeTable(_codeLength);
tb.FillChars();
char firstChar = (char)reader.ReadByte();
string match = firstChar.ToString();
int lastPercent = 0;
while (reader.BaseStream.Position < reader.BaseStream.Length)
{
lastPercent = RaiseEvent(reader, lastPercent);
char nextChar = (char)reader.ReadByte();
string nextMatch = match + nextChar.ToString();
if (tb.Contains(nextMatch))
{
if (tb.HasSpace)
{
match = nextMatch;
}
else
{
WriteCode(writer, tb.GetCode(nextMatch));
if (reader.BaseStream.Position < reader.BaseStream.Length)
{
match = ((char)reader.ReadByte()).ToString();
}
else
{
break;
}
}
}
else
{
WriteCode(writer, tb.GetCode(match));
if (tb.HasSpace)
{
tb.AddString(nextMatch);
}
match = nextChar.ToString();
}
Debug.Assert(writer.BaseStream.Position % 2 == 0);
}
WriteCode(writer, tb.GetCode(match));
RaiseFinishEvent();
}
