IM2_MutableMatrix_get_entries()

engine_RawRingElementArrayArrayOrNull IM2_MutableMatrix_get_entries

(

const MutableMatrix *

M

)

Definition at line 204 of file mutable-matrix.cpp.

{
  try
    {
      int ncols = M->n_cols();
      int nrows = M->n_rows();
      if(nrows < 0 || ncols < 0)
        {
          ERROR("internal error: matrix has a negative size %d by %d",
                nrows,
                ncols);
          return nullptr;
        }
      engine_RawRingElementArrayArray entries =
          getmemarraytype(engine_RawRingElementArrayArray, nrows);
      entries->len = nrows;
      for(int r = 0; r < nrows; r++)
        {
          engine_RawRingElementArray currRow =
              getmemarraytype(engine_RawRingElementArray, ncols);
          currRow->len = ncols;
          entries->array[r] = currRow;
        }
      for(int r = 0; r < nrows; r++)
        {
          for(int c = 0; c < ncols; c++)
            {
              ring_elem result;
              M->get_entry(r, c, result);
              entries->array[r]->array[c] =
                  RingElement::make_raw(M->get_ring(), result);
            }
        }
      return entries;
    } catch (const exc::engine_error& e)
    {
      ERROR(e.what());
      return nullptr;
    }
  return nullptr;
}

References ERROR, MutableMatrix::get_entry(), MutableMatrix::get_ring(), getmemarraytype, RingElement::make_raw(), MutableMatrix::n_cols(), MutableMatrix::n_rows(), and result().