Reconstruction/MdcPatRec/MdcTrkRecon/MdcTrkRecon-00-03-45/MdcTrkRecon/countBits.h File Reference

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Functions
int	countbits (unsigned word)

Function Documentation

countbits()

int countbits ( unsigned  word )

inline

Definition at line 5 of file Reconstruction/MdcPatRec/MdcTrkRecon/MdcTrkRecon-00-03-45/MdcTrkRecon/countBits.h.

                                    {
   const int nbit[16] = { 0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4 };
   int nset=0;
   for (unsigned i=0;i<2*sizeof(unsigned);i++) { // assume char = 8 bits, i.e. two
       nset+=nbit[word&0xf];                // iterations per 'char' size object
       word>>=4;
   }
   return nset;
}