private Octets Update(Octets oin)
{
var oout = new Octets();
uint ipos = 0, opos = 0;
byte[] ibuf = oin.ByteArray;
var isize = (uint)oin.Count;
uint remain = (uint)Mppc.MppcHistLen - _histptr - _legacyIn;
if (isize >= remain)
{
oout.Resize((int)(isize + _legacyIn) * 9 / 8 + 6);
byte[] obuf = oout.ByteArray;
Array.Copy(ibuf, ipos, _history, _histptr + _legacyIn, remain);
isize -= remain;
ipos += remain;
compress_block(obuf, ref opos, remain + _legacyIn);
_histptr = 0;
for (;
isize >= (uint)Mppc.MppcHistLen;
isize -= (uint)Mppc.MppcHistLen, ipos += (uint)Mppc.MppcHistLen)
{
Array.Copy(ibuf, ipos, _history, _histptr, (int)Mppc.MppcHistLen);
compress_block(obuf, ref opos, (uint)Mppc.MppcHistLen);
_histptr = 0;
}
oout.Resize((int)opos);
}
Array.Copy(ibuf, ipos, _history, _histptr + _legacyIn, isize);
_legacyIn += isize;
return(oin.Swap(oout));
}
public Octets Final(Octets oin)
{
if (oin.Count == 0 && _legacyIn == 0)
{
return(oin);
}
Octets oout = Update(oin);
int osize = oout.Count;
oout.Reserve(osize + (int)_legacyIn * 9 / 8 + 6);
byte[] obuf = oout.ByteArray;
var opos = (uint)osize;
compress_block(obuf, ref opos, _legacyIn);
oout.Resize((int)opos);
return(oin.Swap(oout));
}
