public void GetBlock(DeflateInput input, OutputBuffer output, bool isFinal)
{
Debug.Assert(output != null);
Debug.Assert(output.FreeBytes >= 5);
int num = 0;
if (input != null)
{
num = Math.Min(input.Count, output.FreeBytes - 5 - output.BitsInBuffer);
if (num > 65531)
{
num = 65531;
}
}
if (isFinal)
{
output.WriteBits(3, 1U);
}
else
{
output.WriteBits(3, 0U);
}
output.FlushBits();
this.WriteLenNLen((ushort)num, output);
if (input == null || num <= 0)
{
return;
}
output.WriteBytes(input.Buffer, input.StartIndex, num);
input.ConsumeBytes(num);
}
internal static void WriteMatch(int matchLen, int matchPos, OutputBuffer output)
{
Debug.Assert(matchLen >= 3 && matchLen <= 258, "Illegal currentMatch length!");
uint num1 = FastEncoderStatics.FastEncoderLiteralCodeInfo[254 + matchLen];
int n1 = (int)num1 & 31;
Debug.Assert((uint)n1 > 0U, "Invalid Match Length!");
if (n1 <= 16)
{
output.WriteBits(n1, num1 >> 5);
}
else
{
output.WriteBits(16, num1 >> 5 & (uint)ushort.MaxValue);
output.WriteBits(n1 - 16, num1 >> 21);
}
uint num2 = FastEncoderStatics.FastEncoderDistanceCodeInfo[FastEncoderStatics.GetSlot(matchPos)];
output.WriteBits((int)num2 & 15, num2 >> 8);
int n2 = (int)(num2 >> 4) & 15;
if ((uint)n2 <= 0U)
{
return;
}
output.WriteBits(n2, (uint)matchPos & FastEncoderStatics.BitMask[n2]);
}
private void WriteEndOfBlock(OutputBuffer output)
{
uint num = FastEncoderStatics.FastEncoderLiteralCodeInfo[256];
int n = (int)num & 31;
output.WriteBits(n, num >> 5);
}
internal static void WriteDeflatePreamble(OutputBuffer output)
{
output.WriteBytes(FastEncoderStatics.FastEncoderTreeStructureData, 0, FastEncoderStatics.FastEncoderTreeStructureData.Length);
output.WriteBits(9, 34U);
}
internal static void WriteChar(byte b, OutputBuffer output)
{
uint num = FastEncoderStatics.FastEncoderLiteralCodeInfo[(int)b];
output.WriteBits((int)num & 31, num >> 5);
}
