Function increment

src/array_slice.cpp:514–521

/ increment a multi-index in which n_i runs over*/ the range 0 <= n_i < nMax_i. return true if this is the increment */ that brings the multiindex to all zeros. */ /

/* that brings the multiindex to all zeros.                           */
/**********************************************************************/
bool increment(size_t *n, size_t *nMax, int rank) {
  for (rank--; rank >= 0; rank--)
    if (++n[rank] < nMax[rank])
      return false;
    else
      n[rank] = 0;
  return true;
}

// get the dimensions of reduced arrays (i.e., arrays collapsed along empty dimensions of original
// volume)