public int EndInflate()
{
if (this.istate == null)
{
throw new ZlibException("No Inflate State!");
}
int num = this.istate.End();
this.istate = null;
return(num);
}
internal int Inflate(FlushType flush)
{
int num = (int)flush;
if (this._codec.InputBuffer == null)
{
throw new ZlibException("InputBuffer is null. ");
}
int num2 = (num == 4) ? -5 : 0;
int r = -5;
Label_0027:
switch (this.mode)
{
case 0:
{
int num6;
if (this._codec.AvailableBytesIn == 0)
{
return(r);
}
r = num2;
this._codec.AvailableBytesIn--;
this._codec.TotalBytesIn += 1L;
InflateManager manager = this;
byte[] inputBuffer = this._codec.InputBuffer;
int index = this._codec.NextIn++;
manager.method = num6 = inputBuffer[index];
if ((num6 & 15) == 8)
{
if (((this.method >> 4) + 8) > this.wbits)
{
this.mode = 13;
this._codec.Message = string.Format("invalid window size ({0})", (this.method >> 4) + 8);
this.marker = 5;
goto Label_0027;
}
this.mode = 1;
break;
}
this.mode = 13;
this._codec.Message = string.Format("unknown compression method (0x{0:X2})", this.method);
this.marker = 5;
goto Label_0027;
}
case 1:
break;
case 2:
goto Label_04BA;
case 3:
goto Label_0533;
case 4:
goto Label_05B4;
case 5:
goto Label_0634;
case 6:
this.mode = 13;
this._codec.Message = "need dictionary";
this.marker = 0;
return(-2);
case 7:
r = this.blocks.Process(r);
if (r != -3)
{
if (r == 0)
{
r = num2;
}
if (r != 1)
{
return(r);
}
r = num2;
this.blocks.Reset(this.was);
if (!this.HandleRfc1950HeaderBytes)
{
this.mode = 12;
goto Label_0027;
}
this.mode = 8;
goto Label_0284;
}
this.mode = 13;
this.marker = 0;
goto Label_0027;
case 8:
goto Label_0284;
case 9:
goto Label_02FF;
case 10:
goto Label_0382;
case 11:
goto Label_0404;
case 12:
goto Label_06F1;
case 13:
throw new ZlibException(string.Format("Bad state ({0})", this._codec.Message));
default:
throw new ZlibException("Stream error.");
}
if (this._codec.AvailableBytesIn == 0)
{
return(r);
}
r = num2;
this._codec.AvailableBytesIn--;
this._codec.TotalBytesIn += 1L;
int num7 = this._codec.InputBuffer[this._codec.NextIn++] & 0xff;
if ((((this.method << 8) + num7) % 0x1f) != 0)
{
this.mode = 13;
this._codec.Message = "incorrect header check";
this.marker = 5;
}
else
{
if ((num7 & 0x20) != 0)
{
this.mode = 2;
goto Label_04BA;
}
this.mode = 7;
}
goto Label_0027;
Label_0284:
if (this._codec.AvailableBytesIn == 0)
{
return(r);
}
r = num2;
this._codec.AvailableBytesIn--;
this._codec.TotalBytesIn += 1L;
this.need = ((this._codec.InputBuffer[this._codec.NextIn++] & 0xff) << 0x18) & -16777216;
this.mode = 9;
Label_02FF:
if (this._codec.AvailableBytesIn == 0)
{
return(r);
}
r = num2;
this._codec.AvailableBytesIn--;
this._codec.TotalBytesIn += 1L;
this.need += ((this._codec.InputBuffer[this._codec.NextIn++] & 0xff) << 0x10) & 0xff0000L;
this.mode = 10;
Label_0382:
if (this._codec.AvailableBytesIn == 0)
{
return(r);
}
r = num2;
this._codec.AvailableBytesIn--;
this._codec.TotalBytesIn += 1L;
this.need += ((this._codec.InputBuffer[this._codec.NextIn++] & 0xff) << 8) & 0xff00L;
this.mode = 11;
Label_0404:
if (this._codec.AvailableBytesIn == 0)
{
return(r);
}
r = num2;
this._codec.AvailableBytesIn--;
this._codec.TotalBytesIn += 1L;
this.need += this._codec.InputBuffer[this._codec.NextIn++] & 0xffL;
if (((int)this.was[0]) == ((int)this.need))
{
this.mode = 12;
goto Label_06F1;
}
this.mode = 13;
this._codec.Message = "incorrect data check";
this.marker = 5;
goto Label_0027;
Label_04BA:
if (this._codec.AvailableBytesIn == 0)
{
return(r);
}
r = num2;
this._codec.AvailableBytesIn--;
this._codec.TotalBytesIn += 1L;
this.need = ((this._codec.InputBuffer[this._codec.NextIn++] & 0xff) << 0x18) & -16777216;
this.mode = 3;
Label_0533:
if (this._codec.AvailableBytesIn == 0)
{
return(r);
}
r = num2;
this._codec.AvailableBytesIn--;
this._codec.TotalBytesIn += 1L;
this.need += ((this._codec.InputBuffer[this._codec.NextIn++] & 0xff) << 0x10) & 0xff0000L;
this.mode = 4;
Label_05B4:
if (this._codec.AvailableBytesIn == 0)
{
return(r);
}
r = num2;
this._codec.AvailableBytesIn--;
this._codec.TotalBytesIn += 1L;
this.need += ((this._codec.InputBuffer[this._codec.NextIn++] & 0xff) << 8) & 0xff00L;
this.mode = 5;
Label_0634:
if (this._codec.AvailableBytesIn == 0)
{
return(r);
}
this._codec.AvailableBytesIn--;
this._codec.TotalBytesIn += 1L;
this.need += this._codec.InputBuffer[this._codec.NextIn++] & 0xffL;
this._codec._Adler32 = this.need;
this.mode = 6;
return(2);
Label_06F1:
return(1);
}
public int InitializeInflate(int windowBits, bool expectRfc1950Header)
{
this.WindowBits = windowBits;
this.istate = new InflateManager(expectRfc1950Header);
return(this.istate.Initialize(this, windowBits));
}