private bool ProcessCode(int code, byte[] buffer, int offset, int count, ref int read)
{
if (code < this._codeTable.Count)
{
LzwDecompressStream.Sequence sequence = this._codeTable[code];
if (sequence.IsStopCode)
{
return(false);
}
if (sequence.IsClearCode)
{
this.InitCodeTable();
return(true);
}
this._remainingBytes = LzwDecompressStream.CopySequenceToBuffer(sequence.Bytes, buffer, offset, count, ref read);
if (this._prevCode >= 0)
{
this._codeTable.Add(this._codeTable[this._prevCode].Append(sequence.Bytes[0]));
}
}
else
{
LzwDecompressStream.Sequence sequence1 = this._codeTable[this._prevCode];
LzwDecompressStream.Sequence local = sequence1;
//int num = (int)local.Bytes[0];
LzwDecompressStream.Sequence sequence2 = (local).Append(/*(byte)num*/ local.Bytes[0]);
this._codeTable.Add(sequence2);
this._remainingBytes = LzwDecompressStream.CopySequenceToBuffer(sequence2.Bytes, buffer, offset, count, ref read);
}
this._prevCode = code;
return(true);
}
public void Add(LzwDecompressStream.Sequence sequence)
{
if (this._count >= this._table.Length)
{
return;
}
LzwDecompressStream.Sequence[] table = this._table;
int count = this._count;
this._count = count + 1;
int index = count;
LzwDecompressStream.Sequence sequence1 = sequence;
table[index] = sequence1;
if ((this._count & this._count - 1) != 0 || this._codeLength >= 12)
{
return;
}
this._codeLength = this._codeLength + 1;
}
public CodeTable(int minimumCodeLength)
{
this._minimumCodeLength = minimumCodeLength;
this._codeLength = this._minimumCodeLength + 1;
int num = 1 << minimumCodeLength;
this._table = new LzwDecompressStream.Sequence[4096];
for (int index1 = 0; index1 < num; ++index1)
{
LzwDecompressStream.Sequence[] table = this._table;
int count = this._count;
this._count = count + 1;
int index2 = count;
LzwDecompressStream.Sequence sequence = new LzwDecompressStream.Sequence(new byte[1] {
(byte)index1
});
table[index2] = sequence;
}
this.Add(LzwDecompressStream.Sequence.ClearCode);
this.Add(LzwDecompressStream.Sequence.StopCode);
}
private Sequence(bool isClearCode, bool isStopCode)
{
this = new LzwDecompressStream.Sequence();
this.IsClearCode = isClearCode;
this.IsStopCode = isStopCode;
}
public Sequence(byte[] bytes)
{
this = new LzwDecompressStream.Sequence();
this.Bytes = bytes;
}
