Method update1

Libraries/unrar/model.cpp:396–407

inline void RARPPM_CONTEXT::update1(ModelPPM *Model,RARPPM_STATE* p)
{
  (Model->FoundState=p)->Freq += 4;              
  U.SummFreq += 4;
  if (p[0].Freq > p[-1].Freq) 
  {
    _PPMD_SWAP(p[0],p[-1]);                   
    Model->FoundState=--p;
    if (p->Freq > MAX_FREQ)             
      rescale(Model);
  }
}