private bool Decode()
{
int num2;
int num3;
switch (mode)
{
case 0:
return DecodeHeader();
case 1:
return DecodeDict();
case 2:
if (!isLastBlock)
{
int num = input.PeekBits(3);
if (num < 0)
{
return false;
}
input.DropBits(3);
if ((num & 1) != 0)
{
isLastBlock = true;
}
switch ((num >> 1))
{
case 0:
input.SkipToByteBoundary();
mode = 3;
goto Label_0134;
case 1:
litlenTree = InflaterHuffmanTree.defLitLenTree;
distTree = InflaterHuffmanTree.defDistTree;
mode = 7;
goto Label_0134;
case 2:
dynHeader = new InflaterDynHeader();
mode = 6;
goto Label_0134;
}
throw new SharpZipBaseException("Unknown block type " + num);
}
if (!noHeader)
{
input.SkipToByteBoundary();
neededBits = 0x20;
mode = DECODE_CHKSUM;
return true;
}
mode = FINISHED;
return false;
case 3:
uncomprLen = input.PeekBits(0x10);
if (uncomprLen >= 0)
{
input.DropBits(0x10);
mode = 4;
goto Label_0167;
}
return false;
case 4:
goto Label_0167;
case 5:
goto Label_01A9;
case 6:
if (dynHeader.Decode(input))
{
litlenTree = dynHeader.BuildLitLenTree();
distTree = dynHeader.BuildDistTree();
mode = 7;
goto Label_022D;
}
return false;
case 7:
case 8:
case 9:
case 10:
goto Label_022D;
case DECODE_CHKSUM:
return DecodeChksum();
case FINISHED:
return false;
default:
throw new SharpZipBaseException("Inflater.Decode unknown mode");
}
Label_0134:
return true;
Label_0167:
num2 = input.PeekBits(0x10);
if (num2 < 0)
{
return false;
}
input.DropBits(0x10);
if (num2 != (uncomprLen ^ 0xffff))
{
throw new SharpZipBaseException("broken uncompressed block");
}
mode = 5;
Label_01A9:
num3 = outputWindow.CopyStored(input, uncomprLen);
uncomprLen -= num3;
if (uncomprLen == 0)
{
mode = 2;
return true;
}
return !input.IsNeedingInput;
Label_022D:
return DecodeHuffman();
}
public void Reset()
{
mode = noHeader ? 2 : 0;
totalIn = 0L;
totalOut = 0L;
input.Reset();
outputWindow.Reset();
dynHeader = null;
litlenTree = null;
distTree = null;
isLastBlock = false;
adler.Reset();
}