protected DynamicContent(bool binary, int capacity)
{
if (binary)
{
bytebuf = BufferUtility.GetByteBuffer(capacity);
}
else
{
charbuf = BufferUtility.GetCharBuffer(capacity);
}
count = 0;
}
void AddByte(byte b)
{
// ensure capacity
int olen = bytebuf.Length; // old length
if (count >= olen)
{
int nlen = olen * 4; // new length
byte[] obuf = bytebuf;
bytebuf = BufferUtility.GetByteBuffer(nlen);
Array.Copy(obuf, 0, bytebuf, 0, olen);
BufferUtility.Return(obuf);
}
bytebuf[count++] = b;
// calculate checksum
ulong cs = checksum;
cs ^= b; // XOR
checksum = cs >> 57 | cs << 7; // circular left shift 7 bit
}