move Core/ to a src/ subdir, in preparation for following changes

2026-04-10 11:34:33 +08:00 · 2007-12-28 16:00:55 +00:00
parent e7bdbe2e6a
commit dfdad129a3
35 changed files with 0 additions and 0 deletions
--- a/Eigen/src/Core/DiagonalCoeffs.h
+++ b/Eigen/src/Core/DiagonalCoeffs.h
@@ -0,0 +1,98 @@
+// This file is part of Eigen, a lightweight C++ template library
+// for linear algebra. Eigen itself is part of the KDE project.
+//
+// Copyright (C) 2006-2007 Benoit Jacob <jacob@math.jussieu.fr>
+//
+// Eigen is free software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the Free Software
+// Foundation; either version 2 or (at your option) any later version.
+//
+// Eigen is distributed in the hope that it will be useful, but WITHOUT ANY
+// WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+// FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
+// details.
+//
+// You should have received a copy of the GNU General Public License along
+// with Eigen; if not, write to the Free Software Foundation, Inc., 51
+// Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+//
+// As a special exception, if other files instantiate templates or use macros
+// or functions from this file, or you compile this file and link it
+// with other works to produce a work based on this file, this file does not
+// by itself cause the resulting work to be covered by the GNU General Public
+// License. This exception does not invalidate any other reasons why a work
+// based on this file might be covered by the GNU General Public License.
+
+#ifndef EIGEN_DIAGONALCOEFFS_H
+#define EIGEN_DIAGONALCOEFFS_H
+
+/** \class DiagonalCoeffs
+  *
+  * \brief Expression of the main diagonal of a square matrix
+  *
+  * \param MatrixType the type of the object in which we are taking the main diagonal
+  *
+  * This class represents an expression of the main diagonal of a square matrix.
+  * It is the return type of MatrixBase::diagonal() and most of the time this is
+  * the only way it is used.
+  *
+  * \sa MatrixBase::diagonal()
+  */
+template<typename MatrixType> class DiagonalCoeffs
+  : public MatrixBase<typename MatrixType::Scalar, DiagonalCoeffs<MatrixType> >
+{
+  public:
+    typedef typename MatrixType::Scalar Scalar;
+    typedef typename MatrixType::Ref MatRef;
+    friend class MatrixBase<Scalar, DiagonalCoeffs<MatrixType> >;
+    
+    DiagonalCoeffs(const MatRef& matrix) : m_matrix(matrix) {}
+    
+    DiagonalCoeffs(const DiagonalCoeffs& other) : m_matrix(other.m_matrix) {}
+    
+    EIGEN_INHERIT_ASSIGNMENT_OPERATORS(DiagonalCoeffs)
+    
+  private:
+    static const int _RowsAtCompileTime = MatrixType::RowsAtCompileTime,
+                     _ColsAtCompileTime = 1;
+    
+    const DiagonalCoeffs& _ref() const { return *this; }
+    int _rows() const { return std::min(m_matrix.rows(), m_matrix.cols()); }
+    int _cols() const { return 1; }
+    
+    Scalar& _coeffRef(int row, int)
+    {
+      return m_matrix.coeffRef(row, row);
+    }
+    
+    Scalar _coeff(int row, int) const
+    {
+      return m_matrix.coeff(row, row);
+    }
+    
+  protected:
+    MatRef m_matrix;
+};
+
+/** \returns an expression of the main diagonal of *this, which must be a square matrix.
+  *
+  * Example: \include MatrixBase_diagonal.cpp
+  * Output: \verbinclude MatrixBase_diagonal.out
+  *
+  * \sa class DiagonalCoeffs */
+template<typename Scalar, typename Derived>
+DiagonalCoeffs<Derived>
+MatrixBase<Scalar, Derived>::diagonal()
+{
+  return DiagonalCoeffs<Derived>(ref());
+}
+
+/** This is the const version of diagonal(). */
+template<typename Scalar, typename Derived>
+const DiagonalCoeffs<Derived>
+MatrixBase<Scalar, Derived>::diagonal() const
+{
+  return DiagonalCoeffs<Derived>(ref());
+}
+
+#endif // EIGEN_DIAGONALCOEFFS_H