eigensparseaddon.hh

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// SPDX-FileCopyrightText: 2021-2024 The Ikarus Developers mueller@ibb.uni-stuttgart.de
// SPDX-License-Identifier: LGPL-3.0-or-later
 
#pragma once
 
inline Index getLinearIndex(Index row, Index col) const {
  eigen_assert(row >= 0 && row < rows() && col >= 0 && col < cols());
 
  const Index outer = IsRowMajor ? row : col;
  const Index inner = IsRowMajor ? col : row;
 
  Index start = m_outerIndex[outer];
  Index end   = m_innerNonZeros ? m_outerIndex[outer] + m_innerNonZeros[outer] : m_outerIndex[outer + 1];
  eigen_assert(end >= start && "you probably called coeffRef on a non finalized matrix");
 
  Index p = m_data.searchLowerIndex(start, end - 1, StorageIndex(inner));
  return p;
}