public long Get24Bits()
{
while (bufferLength < 24)
{
buffer = ((BinaryOperation.Bit32ShiftL(buffer, 8)) | (reader.Readbyte() & 0xff));
bufferLength += 8;
noOfbytesRead++;
}
return((BinaryOperation.Bit32ShiftR(buffer, (int)(bufferLength - 24))) & 0xffffff);
}
public int Get2DCode()
{
int tuple0, tuple1;
if (bufferLength == 0)
{
buffer = (reader.Readbyte() & 0xff);
bufferLength = 8;
noOfbytesRead++;
int lookup = (int)((BinaryOperation.Bit32ShiftR(buffer, 1)) & 0x7f);
tuple0 = twoDimensionalTable1[lookup, 0];
tuple1 = twoDimensionalTable1[lookup, 1];
}
else if (bufferLength == 8)
{
int lookup = (int)((BinaryOperation.Bit32ShiftR(buffer, 1)) & 0x7f);
tuple0 = twoDimensionalTable1[lookup, 0];
tuple1 = twoDimensionalTable1[lookup, 1];
}
else
{
int lookup = (int)((BinaryOperation.Bit32ShiftL(buffer, (int)(7 - bufferLength))) & 0x7f);
tuple0 = twoDimensionalTable1[lookup, 0];
tuple1 = twoDimensionalTable1[lookup, 1];
if (tuple0 < 0 || tuple0 > (int)bufferLength)
{
int right = (reader.Readbyte() & 0xff);
long left = (BinaryOperation.Bit32ShiftL(buffer, 8));
buffer = left | right;
bufferLength += 8;
noOfbytesRead++;
int look = (int)(BinaryOperation.Bit32ShiftR(buffer, (int)(bufferLength - 7)) & 0x7f);
tuple0 = twoDimensionalTable1[look, 0];
tuple1 = twoDimensionalTable1[look, 1];
}
}
if (tuple0 < 0)
{
return(0);
}
bufferLength -= tuple0;
return(tuple1);
}
public int GetBlackCode()
{
int tuple0, tuple1;
long code;
if (bufferLength == 0)
{
buffer = (reader.Readbyte() & 0xff);
bufferLength = 8;
noOfbytesRead++;
}
while (true)
{
if (bufferLength >= 6 && ((BinaryOperation.Bit32ShiftR(buffer, (int)(bufferLength - 6))) & 0x3f) == 0)
{
if (bufferLength <= 13)
{
code = BinaryOperation.Bit32ShiftL(buffer, (int)(13 - bufferLength));
}
else
{
code = BinaryOperation.Bit32ShiftR(buffer, (int)(bufferLength - 13));
}
tuple0 = blackTable1[(int)(code & 0x7f), 0];
tuple1 = blackTable1[(int)(code & 0x7f), 1];
}
else if (bufferLength >= 4 && ((buffer >> ((int)bufferLength - 4)) & 0x0f) == 0)
{
if (bufferLength <= 12)
{
code = BinaryOperation.Bit32ShiftL(buffer, (int)(12 - bufferLength));
}
else
{
code = BinaryOperation.Bit32ShiftR(buffer, (int)(bufferLength - 12));
}
int lookup = (int)((code & 0xff) - 64);
if (lookup >= 0)
{
tuple0 = blackTable2[lookup, 0];
tuple1 = blackTable2[lookup, 1];
}
else
{
tuple0 = blackTable1[blackTable1.Length + lookup, 0];
tuple1 = blackTable1[blackTable1.Length + lookup, 1];
}
}
else
{
if (bufferLength <= 6)
{
code = BinaryOperation.Bit32ShiftL(buffer, (int)(6 - bufferLength));
}
else
{
code = BinaryOperation.Bit32ShiftR(buffer, (int)(bufferLength - 6));
}
int lookup = (int)(code & 0x3f);
if (lookup >= 0)
{
tuple0 = blackTable3[lookup, 0];
tuple1 = blackTable3[lookup, 1];
}
else
{
tuple0 = blackTable2[blackTable2.Length + lookup, 0];
tuple1 = blackTable2[blackTable2.Length + lookup, 1];
}
}
if (tuple0 > 0 && tuple0 <= (int)bufferLength)
{
bufferLength -= tuple0;
return(tuple1);
}
if (bufferLength >= 13)
{
break;
}
buffer = ((BinaryOperation.Bit32ShiftL(buffer, 8)) | (reader.Readbyte() & 0xff));
bufferLength += 8;
noOfbytesRead++;
}
bufferLength--;
return(1);
}
public int GetWhiteCode()
{
int tuple0, tuple1;
long code;
if (bufferLength == 0)
{
buffer = (reader.Readbyte() & 0xff);
bufferLength = 8;
noOfbytesRead++;
}
while (true)
{
if (bufferLength >= 7 && ((BinaryOperation.Bit32ShiftR(buffer, (int)(bufferLength - 7))) & 0x7f) == 0)
{
if (bufferLength <= 12)
{
code = BinaryOperation.Bit32ShiftL(buffer, (int)(12 - bufferLength));
}
else
{
code = BinaryOperation.Bit32ShiftR(buffer, (int)(bufferLength - 12));
}
tuple0 = whiteTable1[(int)(code & 0x1f), 0];
tuple1 = whiteTable1[(int)(code & 0x1f), 1];
}
else
{
if (bufferLength <= 9)
{
code = BinaryOperation.Bit32ShiftL(buffer, (int)(9 - bufferLength));
}
else
{
code = BinaryOperation.Bit32ShiftR(buffer, (int)(bufferLength - 9));
}
int lookup = (int)(code & 0x1ff);
if (lookup >= 0)
{
tuple0 = whiteTable2[lookup, 0];
tuple1 = whiteTable2[lookup, 1];
}
else
{
tuple0 = whiteTable2[whiteTable2.Length + lookup, 0];
tuple1 = whiteTable2[whiteTable2.Length + lookup, 1];
}
}
if (tuple0 > 0 && tuple0 <= (int)bufferLength)
{
bufferLength -= tuple0;
return(tuple1);
}
if (bufferLength >= 12)
{
break;
}
buffer = ((BinaryOperation.Bit32ShiftL(buffer, 8)) | reader.Readbyte() & 0xff);
bufferLength += 8;
noOfbytesRead++;
}
bufferLength--;
return(1);
}
