private void SetupRandPartA()
{
if (this.su_i2 <= this.last)
{
this.su_chPrev = this.su_ch2;
int num = (int)(this.data.ll8[this.su_tPos] & 255);
this.su_tPos = this.data.tt[this.su_tPos];
if (this.su_rNToGo == 0)
{
this.su_rNToGo = Rand.Rnums(this.su_rTPos) - 1;
if (++this.su_rTPos == 512)
{
this.su_rTPos = 0;
}
}
else
{
this.su_rNToGo--;
}
num = (this.su_ch2 = (num ^ ((this.su_rNToGo != 1) ? 0 : 1)));
this.su_i2++;
this.currentChar = num;
this.currentState = BZip2InputStream.CState.RAND_PART_B;
this.crc.UpdateCRC((byte)num);
}
else
{
this.EndBlock();
this.InitBlock();
this.SetupBlock();
}
}
private void InitBlock()
{
char c = this.bsGetUByte();
char c2 = this.bsGetUByte();
char c3 = this.bsGetUByte();
char c4 = this.bsGetUByte();
char c5 = this.bsGetUByte();
char c6 = this.bsGetUByte();
if (c == '\u0017' && c2 == 'r' && c3 == 'E' && c4 == '8' && c5 == 'P' && c6 == '\u0090')
{
this.complete();
}
else
{
if (c != '1' || c2 != 'A' || c3 != 'Y' || c4 != '&' || c5 != 'S' || c6 != 'Y')
{
this.currentState = BZip2InputStream.CState.EOF;
string message = string.Format("bad block header at offset 0x{0:X}", this.input.Position);
throw new IOException(message);
}
this.storedBlockCRC = this.bsGetInt();
this.blockRandomised = (this.GetBits(1) == 1);
if (this.data == null)
{
this.data = new BZip2InputStream.DecompressionState(this.blockSize100k);
}
this.getAndMoveToFrontDecode();
this.crc.Reset();
this.currentState = BZip2InputStream.CState.START_BLOCK;
}
}
private void complete()
{
this.storedCombinedCRC = this.bsGetInt();
this.currentState = BZip2InputStream.CState.EOF;
this.data = null;
if (this.storedCombinedCRC != this.computedCombinedCRC)
{
string message = string.Format("BZip2 CRC error (expected {0:X8}, computed {1:X8})", this.storedCombinedCRC, this.computedCombinedCRC);
throw new IOException(message);
}
}
private void SetupRandPartC()
{
if (this.su_j2 < (int)this.su_z)
{
this.currentChar = this.su_ch2;
this.crc.UpdateCRC((byte)this.su_ch2);
this.su_j2++;
}
else
{
this.currentState = BZip2InputStream.CState.RAND_PART_A;
this.su_i2++;
this.su_count = 0;
this.SetupRandPartA();
}
}
private void SetupNoRandPartC()
{
if (this.su_j2 < (int)this.su_z)
{
int num = this.su_ch2;
this.currentChar = num;
this.crc.UpdateCRC((byte)num);
this.su_j2++;
this.currentState = BZip2InputStream.CState.NO_RAND_PART_C;
}
else
{
this.su_i2++;
this.su_count = 0;
this.SetupNoRandPartA();
}
}
private void SetupNoRandPartA()
{
if (this.su_i2 <= this.last)
{
this.su_chPrev = this.su_ch2;
int num = (int)(this.data.ll8[this.su_tPos] & 255);
this.su_ch2 = num;
this.su_tPos = this.data.tt[this.su_tPos];
this.su_i2++;
this.currentChar = num;
this.currentState = BZip2InputStream.CState.NO_RAND_PART_B;
this.crc.UpdateCRC((byte)num);
}
else
{
this.currentState = BZip2InputStream.CState.NO_RAND_PART_A;
this.EndBlock();
this.InitBlock();
this.SetupBlock();
}
}
private void SetupRandPartB()
{
if (this.su_ch2 != this.su_chPrev)
{
this.currentState = BZip2InputStream.CState.RAND_PART_A;
this.su_count = 1;
this.SetupRandPartA();
}
else if (++this.su_count >= 4)
{
this.su_z = (char)(this.data.ll8[this.su_tPos] & 255);
this.su_tPos = this.data.tt[this.su_tPos];
if (this.su_rNToGo == 0)
{
this.su_rNToGo = Rand.Rnums(this.su_rTPos) - 1;
if (++this.su_rTPos == 512)
{
this.su_rTPos = 0;
}
}
else
{
this.su_rNToGo--;
}
this.su_j2 = 0;
this.currentState = BZip2InputStream.CState.RAND_PART_C;
if (this.su_rNToGo == 1)
{
this.su_z ^= '\u0001';
}
this.SetupRandPartC();
}
else
{
this.currentState = BZip2InputStream.CState.RAND_PART_A;
this.SetupRandPartA();
}
}