private bool Decode()
{
int num2;
int num3;
switch (this.mode)
{
case 0:
return this.DecodeHeader();
case 1:
return this.DecodeDict();
case 2:
if (!this.isLastBlock)
{
int num = this.input.PeekBits(3);
if (num < 0)
{
return false;
}
this.input.DropBits(3);
if ((num & 1) != 0)
{
this.isLastBlock = true;
}
switch ((num >> 1))
{
case 0:
this.input.SkipToByteBoundary();
this.mode = 3;
break;
case 1:
this.litlenTree = InflaterHuffmanTree.defLitLenTree;
this.distTree = InflaterHuffmanTree.defDistTree;
this.mode = 7;
break;
case 2:
this.dynHeader = new InflaterDynHeader();
this.mode = 6;
break;
}
throw new SharpZipBaseException("Unknown block type " + num);
}
if (!this.noHeader)
{
this.input.SkipToByteBoundary();
this.neededBits = 0x20;
this.mode = 11;
return true;
}
this.mode = 12;
return false;
case 3:
this.uncomprLen = this.input.PeekBits(0x10);
if (this.uncomprLen >= 0)
{
this.input.DropBits(0x10);
this.mode = 4;
goto Label_0163;
}
return false;
case 4:
goto Label_0163;
case 5:
goto Label_01A5;
case 6:
if (this.dynHeader.Decode(this.input))
{
this.litlenTree = this.dynHeader.BuildLitLenTree();
this.distTree = this.dynHeader.BuildDistTree();
this.mode = 7;
goto Label_0229;
}
return false;
case 7:
case 8:
case 9:
case 10:
goto Label_0229;
case 11:
return this.DecodeChksum();
case 12:
return false;
default:
throw new SharpZipBaseException("Inflater.Decode unknown mode");
}
return true;
Label_0163:
num2 = this.input.PeekBits(0x10);
if (num2 < 0)
{
return false;
}
this.input.DropBits(0x10);
if (num2 != (this.uncomprLen ^ 0xffff))
{
throw new SharpZipBaseException("broken uncompressed block");
}
this.mode = 5;
Label_01A5:
num3 = this.outputWindow.CopyStored(this.input, this.uncomprLen);
this.uncomprLen -= num3;
if (this.uncomprLen == 0)
{
this.mode = 2;
return true;
}
return !this.input.IsNeedingInput;
Label_0229:
return this.DecodeHuffman();
}
public void Reset()
{
this.mode = this.noHeader ? 2 : 0;
this.totalIn = this.totalOut = 0;
this.input.Reset();
this.outputWindow.Reset();
this.dynHeader = null;
this.litlenTree = null;
this.distTree = null;
this.isLastBlock = false;
this.adler.Reset();
}