Method DecodeNum

Libraries/unrar/unpack15.cpp:482–489

uint Unpack::DecodeNum(uint Num,uint StartPos,uint *DecTab,uint *PosTab)
{
  int I;
  for (Num&=0xfff0,I=0;DecTab[I]<=Num;I++)
    StartPos++;
  Inp.faddbits(StartPos);
  return(((Num-(I ? DecTab[I-1]:0))>>(16-StartPos))+PosTab[StartPos]);
}