Hello, World!

This is the initial commit for Eigen2, since I restarted it from scratch on Sunday.

src/MatrixBase.h

@@ -0,0 +1,247 @@
+// 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_MATRIXBASE_H
+#define EIGEN_MATRIXBASE_H
+
+#include"Util.h"
+#include"MatrixXpr.h"
+
+namespace Eigen
+{
+
+template<typename MatrixType> class MatrixConstRef
+{
+  public:
+    typedef typename ForwardDecl<MatrixType>::Scalar Scalar;
+    
+    MatrixConstRef(const MatrixType& matrix) : m_matrix(matrix) {}
+    MatrixConstRef(const MatrixConstRef& other) : m_matrix(other.m_matrix) {}
+    ~MatrixConstRef() {}
+
+    static bool hasDynamicNumRows()
+    {
+      return MatrixType::hasDynamicNumRows();
+    }
+
+    static bool hasDynamicNumCols()
+    {
+      return MatrixType::hasDynamicNumCols();
+    }
+    
+    int rows() const { return m_matrix.rows(); }
+    int cols() const { return m_matrix.cols(); }
+
+    const Scalar& operator()(int row, int col) const
+    {
+      return m_matrix(row, col);
+    }
+
+  protected:
+    const MatrixType& m_matrix;
+};
+
+template<typename MatrixType> class MatrixRef
+{
+  public:
+    typedef typename ForwardDecl<MatrixType>::Scalar Scalar;
+    
+    MatrixRef(MatrixType& matrix) : m_matrix(matrix) {}
+    MatrixRef(const MatrixRef& other) : m_matrix(other.m_matrix) {}
+    ~MatrixRef() {}
+
+    static bool hasDynamicNumRows()
+    {
+      return MatrixType::hasDynamicNumRows();
+    }
+
+    static bool hasDynamicNumCols()
+    {
+      return MatrixType::hasDynamicNumCols();
+    }
+    
+    int rows() const { return m_matrix.rows(); }
+    int cols() const { return m_matrix.cols(); }
+
+    Scalar& operator()(int row, int col)
+    {
+      return m_matrix(row, col);
+    }
+    
+    MatrixType& matrix() { return m_matrix; }
+
+  protected:
+    MatrixType& m_matrix;
+};
+
+template<typename Derived>
+class MatrixBase
+{
+  public:
+
+    typedef typename ForwardDecl<Derived>::Scalar Scalar;
+    typedef MatrixConstRef<MatrixBase<Derived> > ConstRef;
+    typedef MatrixRef<MatrixBase<Derived> > Ref;
+    typedef MatrixConstXpr<ConstRef> ConstXpr;
+    typedef MatrixXpr<Ref> Xpr;
+
+    Ref ref()
+    {
+      return Ref(*this);
+    }
+    
+    ConstRef constRef() const
+    {
+      return ConstRef(*this);
+    }
+    
+    Xpr xpr()
+    {
+      return Xpr(ref());
+    }
+    
+    ConstXpr constXpr() const
+    {
+      return ConstXpr(constRef());
+    }
+    
+    static bool hasDynamicNumRows()
+    {
+      return Derived::_hasDynamicNumRows();
+    }
+
+    static bool hasDynamicNumCols()
+    {
+      return Derived::_hasDynamicNumCols();
+    }
+    
+    int rows() const
+    {
+      return static_cast<const Derived*>(this)->_rows();
+    }
+    
+    int cols() const
+    {
+      return static_cast<const Derived*>(this)->_cols();
+    }
+    
+    void resize(int rows, int cols)
+    {
+      static_cast<Derived*>(this)->_resize(rows, cols);
+    }
+
+    const Scalar* array() const
+    {
+      return static_cast<const Derived*>(this)->m_array;
+    }
+
+    Scalar* array()
+    {
+      return static_cast<Derived*>(this)->m_array;
+    }
+
+    const Scalar& operator()(int row, int col = 0) const
+    {
+      EIGEN_CHECK_RANGES(*this, row, col);
+      return array()[row + col * rows()];
+    }
+
+    Scalar& operator()(int row, int col = 0)
+    {
+      EIGEN_CHECK_RANGES(*this, row, col);
+      return array()[row + col * rows()];
+    }
+    
+    template<typename XprContent> 
+    void operator=(const MatrixConstXpr<XprContent> &xpr)
+    {
+      resize(xpr.rows(), xpr.cols());
+      for(int i = 0; i < rows(); i++)
+        for(int j = 0; j < cols(); j++)
+          this->operator()(i, j) = xpr(i, j);
+    }
+    
+    void operator=(const MatrixBase &other)
+    {
+      resize(other.rows(), other.cols());
+      for(int i = 0; i < rows(); i++)
+        for(int j = 0; j < cols(); j++)
+          this->operator()(i, j) = other(i, j);
+    }
+    
+    template<typename XprContent> 
+    void operator<<(const MatrixConstXpr<XprContent> &xpr)
+    {
+      Derived tmp(xpr.rows(), xpr.cols());
+      MatrixBase *ptr = static_cast<MatrixBase*>(&tmp);
+      *ptr = xpr;
+      *this = *ptr;
+    }
+    
+    MatrixConstXpr<MatrixRow<const ConstRef> > row(int i) const;
+    MatrixConstXpr<MatrixCol<const ConstRef> > col(int i) const;
+    MatrixConstXpr<MatrixMinor<const ConstRef> > minor(int row, int col) const;
+    MatrixConstXpr<MatrixBlock<const ConstRef> >
+      block(int startRow, int endRow, int startCol = 0, int endCol = 0) const;
+    
+  protected:
+  
+    MatrixBase() {};
+};
+
+template<typename Derived>
+std::ostream & operator <<
+( std::ostream & s,
+  const MatrixBase<Derived> & m )
+{
+  for( int i = 0; i < m.rows(); i++ )
+  {
+    s << m( i, 0 );
+    for (int j = 1; j < m.cols(); j++ )
+      s << " " << m( i, j );
+    if( i < m.rows() - 1)
+      s << std::endl;
+  }
+  return s;
+}
+
+template<typename Content>
+std::ostream & operator << (std::ostream & s,
+                            const MatrixConstXpr<Content>& m)
+{
+  for( int i = 0; i < m.rows(); i++ )
+  {
+    s << m( i, 0 );
+    for (int j = 1; j < m.cols(); j++ )
+      s << " " << m( i, j );
+    if( i < m.rows() - 1)
+      s << std::endl;
+  }
+  return s;
+}
+
+} // namespace Eigen
+
+#endif // EIGEN_MATRIXBASE_H