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 InstallArea/x86_64-el9-gcc13-opt/include/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;
}