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/Column.h
+++ b/Eigen/src/Core/Column.h
@@ -0,0 +1,111 @@
+// 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_COLUMN_H
+#define EIGEN_COLUMN_H
+
+/** \class Column
+  *
+  * \brief Expression of a column
+  *
+  * \param MatrixType the type of the object in which we are taking a column
+  *
+  * This class represents an expression of a column. It is the return
+  * type of MatrixBase::col() and most of the time this is the only way it
+  * is used.
+  *
+  * However, if you want to directly maniputate column expressions,
+  * for instance if you want to write a function returning such an expression, you
+  * will need to use this class.
+  *
+  * Here is an example illustrating this:
+  * \include class_Column.cpp
+  * Output: \verbinclude class_Column.out
+  *
+  * \sa MatrixBase::col()
+  */
+template<typename MatrixType> class Column
+  : public MatrixBase<typename MatrixType::Scalar, Column<MatrixType> >
+{
+  public:
+    typedef typename MatrixType::Scalar Scalar;
+    typedef typename MatrixType::Ref MatRef;
+    friend class MatrixBase<Scalar, Column<MatrixType> >;
+    
+    Column(const MatRef& matrix, int col)
+      : m_matrix(matrix), m_col(col)
+    {
+      assert(col >= 0 && col < matrix.cols());
+    }
+    
+    Column(const Column& other)
+      : m_matrix(other.m_matrix), m_col(other.m_col) {}
+    
+    EIGEN_INHERIT_ASSIGNMENT_OPERATORS(Column)
+    
+  private:
+    static const int _RowsAtCompileTime = MatrixType::RowsAtCompileTime,
+                     _ColsAtCompileTime = 1;
+    const Column& _ref() const { return *this; }
+    int _rows() const { return m_matrix.rows(); }
+    int _cols() const { return 1; }
+    
+    Scalar& _coeffRef(int row, int)
+    {
+      return m_matrix.coeffRef(row, m_col);
+    }
+    
+    Scalar _coeff(int row, int) const
+    {
+      return m_matrix.coeff(row, m_col);
+    }
+    
+  protected:
+    MatRef m_matrix;
+    const int m_col;
+};
+
+/** \returns an expression of the \a i-th column of *this. Note that the numbering starts at 0.
+  *
+  * Example: \include MatrixBase_column.cpp
+  * Output: \verbinclude MatrixBase_column.out
+  *
+  * \sa row(), class Column */
+template<typename Scalar, typename Derived>
+Column<Derived>
+MatrixBase<Scalar, Derived>::col(int i)
+{
+  return Column<Derived>(ref(), i);
+}
+
+/** This is the const version of col(). */
+template<typename Scalar, typename Derived>
+const Column<Derived>
+MatrixBase<Scalar, Derived>::col(int i) const
+{
+  return Column<Derived>(ref(), i);
+}
+
+#endif // EIGEN_COLUMN_H