internal virtual void WriteHeader(bool reverse, int cleanLength, int dirtyLength)
{
int cleanLengthMinus2 = cleanLength - 2;
Debug.Assert(cleanLengthMinus2 >= 0);
Debug.Assert(dirtyLength >= 0);
int token = ((cleanLengthMinus2 & 0x03) << 4) | (dirtyLength & 0x07);
if (reverse)
{
token |= 1 << 7;
}
if (cleanLengthMinus2 > 0x03)
{
token |= 1 << 6;
}
if (dirtyLength > 0x07)
{
token |= 1 << 3;
}
@out.WriteByte((byte)(sbyte)token);
if (cleanLengthMinus2 > 0x03)
{
@out.WriteVInt((int)((uint)cleanLengthMinus2 >> 2));
}
if (dirtyLength > 0x07)
{
@out.WriteVInt((int)((uint)dirtyLength >> 3));
}
}
