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//
// Implementation of inline methods of G4SurfBits
// --------------------------------------------------------------------

inline void G4SurfBits::SetBitNumber(unsigned int bitnumber, G4bool value)
{
  // set bit number 'bitnumber' to be value

  if (bitnumber >= fNBits)
  {
    unsigned int new_size = (bitnumber/8) + 1;
    if (new_size > fNBytes)
    {
      if (new_size < 100 * 1024 * 1024) { new_size *= 2; }
      unsigned char *old_location = fAllBits;
      fAllBits = new unsigned char[new_size];
      std::memcpy(fAllBits,old_location,fNBytes);
      std::memset(fAllBits+fNBytes ,0, new_size-fNBytes);
      fNBytes = new_size;
      delete [] old_location;
    }
    fNBits = bitnumber+1;
  }
  unsigned int loc = bitnumber/8;
  unsigned char bit = bitnumber%8;
  if (value)
  {
    fAllBits[loc] |= (1<<bit);
  }
  else
  {
    fAllBits[loc] &= (0xFF ^ (1<<bit));
  }
}

inline G4bool G4SurfBits::TestBitNumber(unsigned int bitnumber) const
{
  // Return the current value of the bit

  if (bitnumber >= fNBits) { return false; }
  unsigned int loc = bitnumber/8;
  unsigned char value = fAllBits[loc];
  unsigned char bit = bitnumber%8;
  G4bool result = (value & (1<<bit)) != 0;
  return result;
  // short: return 0 != (fAllBits[bitnumber/8] & (1<< (bitnumber%8)));
}

inline void G4SurfBits::ResetBitNumber(unsigned int bitnumber)
{
  SetBitNumber(bitnumber,false);
}

inline G4bool G4SurfBits::operator[](unsigned int bitnumber) const
{
  return TestBitNumber(bitnumber);
}