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/DynBlock.h
+++ b/Eigen/src/Core/DynBlock.h
@@ -0,0 +1,126 @@
+// 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_DYNBLOCK_H
+#define EIGEN_DYNBLOCK_H
+
+/** \class DynBlock
+  *
+  * \brief Expression of a dynamic-size block
+  *
+  * \param MatrixType the type of the object in which we are taking a block
+  *
+  * This class represents an expression of a dynamic-size block. It is the return
+  * type of MatrixBase::dynBlock() and most of the time this is the only way it
+  * is used.
+  *
+  * However, if you want to directly maniputate dynamic-size block 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_DynBlock.cpp
+  * Output: \verbinclude class_DynBlock.out
+  *
+  * \sa MatrixBase::dynBlock()
+  */
+template<typename MatrixType> class DynBlock
+  : public MatrixBase<typename MatrixType::Scalar, DynBlock<MatrixType> >
+{
+  public:
+    typedef typename MatrixType::Scalar Scalar;
+    typedef typename MatrixType::Ref MatRef;
+    friend class MatrixBase<Scalar, DynBlock<MatrixType> >;
+    
+    DynBlock(const MatRef& matrix,
+          int startRow, int startCol,
+          int blockRows, int blockCols)
+      : m_matrix(matrix), m_startRow(startRow), m_startCol(startCol),
+                          m_blockRows(blockRows), m_blockCols(blockCols)
+    {
+      assert(startRow >= 0 && blockRows >= 1 && startRow + blockRows <= matrix.rows()
+          && startCol >= 0 && blockCols >= 1 && startCol + blockCols <= matrix.cols());
+    }
+    
+    DynBlock(const DynBlock& other)
+      : m_matrix(other.m_matrix),
+        m_startRow(other.m_startRow), m_startCol(other.m_startCol),
+        m_blockRows(other.m_blockRows), m_blockCols(other.m_blockCols) {}
+    
+    EIGEN_INHERIT_ASSIGNMENT_OPERATORS(DynBlock)
+    
+  private:
+    static const int
+      _RowsAtCompileTime = MatrixType::RowsAtCompileTime == 1 ? 1 : Dynamic,
+      _ColsAtCompileTime = MatrixType::ColsAtCompileTime == 1 ? 1 : Dynamic;
+
+    const DynBlock& _ref() const { return *this; }
+    int _rows() const { return m_blockRows; }
+    int _cols() const { return m_blockCols; }
+    
+    Scalar& _coeffRef(int row, int col)
+    {
+      return m_matrix.coeffRef(row + m_startRow, col + m_startCol);
+    }
+    
+    Scalar _coeff(int row, int col) const
+    {
+      return m_matrix.coeff(row + m_startRow, col + m_startCol);
+    }
+    
+  protected:
+    MatRef m_matrix;
+    const int m_startRow, m_startCol, m_blockRows, m_blockCols;
+};
+
+/** \returns a dynamic-size expression of a block in *this.
+  *
+  * \param startRow the first row in the block
+  * \param startCol the first column in the block
+  * \param blockRows the number of rows in the block
+  * \param blockCols the number of columns in the block
+  *
+  * Example: \include MatrixBase_dynBlock.cpp
+  * Output: \verbinclude MatrixBase_dynBlock.out
+  *
+  * \sa class DynBlock, block()
+  */
+template<typename Scalar, typename Derived>
+DynBlock<Derived> MatrixBase<Scalar, Derived>
+  ::dynBlock(int startRow, int startCol, int blockRows, int blockCols)
+{
+  return DynBlock<Derived>(ref(), startRow, startCol, blockRows, blockCols);
+}
+
+/** This is the const version of dynBlock(). */
+template<typename Scalar, typename Derived>
+const DynBlock<Derived> MatrixBase<Scalar, Derived>
+  ::dynBlock(int startRow, int startCol, int blockRows, int blockCols) const
+{
+  return DynBlock<Derived>(ref(), startRow, startCol, blockRows, blockCols);
+}
+
+
+#endif // EIGEN_DYNBLOCK_H