Method compare

kernel/linear_algebra/Minor.cc:412–439

}

int MinorKey::compare (const MinorKey& that) const
{
  /* compare by rowKeys first; in case of equality, use columnKeys */
  if (this->getNumberOfRowBlocks() < that.getNumberOfRowBlocks())
    return -1;
  if (this->getNumberOfRowBlocks() > that.getNumberOfRowBlocks())
    return 1;
  /* Here, numbers of rows are equal. */
  for (int r = this->getNumberOfRowBlocks() - 1; r >= 0; r--)
  {
    if (this->getRowKey(r) < that.getRowKey(r)) return -1;
    if (this->getRowKey(r) > that.getRowKey(r)) return 1;
  }
  /* Here, this and that encode ecaxtly the same sets of rows.
     Now, we take a look at the columns. */
  if (this->getNumberOfColumnBlocks() < that.getNumberOfColumnBlocks())
    return -1;
  if (this->getNumberOfColumnBlocks() > that.getNumberOfColumnBlocks())
    return 1;
  /* Here, numbers of columns are equal. */
  for (int c = this->getNumberOfColumnBlocks() - 1; c >= 0; c--)
  {
    if (this->getColumnKey(c) < that.getColumnKey(c)) return -1;
    if (this->getColumnKey(c) > that.getColumnKey(c)) return 1;
  }
  /* Here, this and that encode exactly the same sets of rows and columns. */
  return 0;
}

/* just to make the compiler happy;
   this method should never be called */