Teuchos_ArrayViewDecl.hpp

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// ***********************************************************************
// 
//                    Teuchos: Common Tools Package
//                 Copyright (2004) Sandia Corporation
// 
// Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive
// license for use of this work by or on behalf of the U.S. Government.
// 
// This library is free software; you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as
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//  
// This library 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
// Lesser General Public License for more details.
//  
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
// USA
// Questions? Contact Michael A. Heroux (maherou@sandia.gov) 
// 
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#ifndef TEUCHOS_ARRAY_VIEW_DECL_HPP
#define TEUCHOS_ARRAY_VIEW_DECL_HPP


#include "Teuchos_RCPNode.hpp"
#include "Teuchos_ENull.hpp"
#include "Teuchos_NullIteratorTraits.hpp"
#include "Teuchos_ConstTypeTraits.hpp"


namespace Teuchos {


template<class T> class ArrayRCP;


template<class T>
class ArrayView {
public:


  typedef Teuchos_Index Ordinal;

  typedef T value_type;
  typedef T* pointer;
  typedef const T* const_pointer;
  typedef T& reference;
  typedef const T& const_reference;

#ifdef HAVE_TEUCHOS_ARRAY_BOUNDSCHECK

  typedef ArrayRCP<T> iterator;
#else

  typedef pointer iterator;
#endif

  typedef size_t size_type;
  typedef ptrdiff_t difference_type;




  ArrayView( ENull null_arg = null );

  ArrayView( T* p, Ordinal size );

  ArrayView(const ArrayView<T>& array);

  ArrayView(
    std::vector<typename ConstTypeTraits<T>::NonConstType>& vec
    );

  ArrayView(
    const std::vector<typename ConstTypeTraits<T>::NonConstType>& vec
    );
  
  ArrayView<T>& operator=(const ArrayView<T>& array);

  ~ArrayView();




  bool is_null() const;

  Ordinal size() const;

  std::string toString() const;




  inline T* getRawPtr() const;

  T& operator[](Ordinal i) const;

  T& front() const;

  T& back() const;




  ArrayView<T> view( Ordinal offset, Ordinal size ) const;

  ArrayView<T> operator()( Ordinal offset, Ordinal size ) const;

  const ArrayView<T>& operator()() const;

  ArrayView<const T> getConst() const;

// 2009/06/30: rabartl: Disable Intel compiler warning #597 about the function
// below not ever being called.  This is a bogus warning and if you comment
// out this function, the Teuchos unit tests for this class will not compile
// (see Trilinos bug 4457).
#ifdef __INTEL_COMPILER
#  pragma warning(disable : 597)
#endif

  operator ArrayView<const T>() const;



  void assign(const ArrayView<const T>& array) const;




  iterator begin() const;

  iterator end() const;




  const ArrayView<T>& assert_not_null() const;

  const ArrayView<T>& assert_in_range( Ordinal offset, Ordinal size ) const;


#ifdef HAVE_TEUCHOS_ARRAY_BOUNDSCHECK

  // I should make these private but templated friends are not very portable.
  // Besides, if a client directly calls this it will not compile in an
  // optimized build.

  explicit ArrayView( const ArrayRCP<T> &arcp );

  explicit ArrayView( T* p, Ordinal size, const ArrayRCP<T> &arcp );

#endif

private:

  // ///////////////////////
  // Private data members

  T *ptr_;
  int size_;
#ifdef HAVE_TEUCHOS_ARRAY_BOUNDSCHECK
  ArrayRCP<T> arcp_;
#endif

  void setUpIterators();

  // ///////////////////////
  // Private member functions

  void debug_assert_not_null() const
    {
#ifdef HAVE_TEUCHOS_ARRAY_BOUNDSCHECK
      assert_not_null();
#endif
    }

  void debug_assert_in_range( Ordinal offset, Ordinal size_in ) const
    {
      (void)offset; (void)size_in;
#ifdef HAVE_TEUCHOS_ARRAY_BOUNDSCHECK
      assert_in_range(offset, size_in);
#endif
    }

  void debug_assert_valid_ptr() const
    {
#ifdef HAVE_TEUCHOS_ARRAY_BOUNDSCHECK
      arcp_.access_private_node().assert_valid_ptr(*this);
#endif
    }

public: // Bad bad bad

  // This is a very bad breach of encapsulation but it exists to avoid
  // problems with portability of tempalted friends
  T* access_private_ptr() const
    { return ptr_; }

#ifdef HAVE_TEUCHOS_ARRAY_BOUNDSCHECK
  ArrayRCP<T> access_private_arcp() const
    { return arcp_; }
#endif

};


template<class T>
ArrayView<T> arrayView( T* p, typename ArrayView<T>::Ordinal size );


template<class T>
ArrayView<T> arrayViewFromVector( std::vector<T>& vec );


template<class T>
ArrayView<const T> arrayViewFromVector( const std::vector<T>& vec );


#ifndef __sun


// 2007/11/30: From some reason, the Sun C++ compile on sass9000 compains that
// a call to this function below is ambiguous.  However, if you just comment
// the function out, then the code on g++ (3.4.6 at least) will not compile.
// Therefore, I have no choice but to put in a hacked ifdef for the sun.


template<class T>
std::vector<T> createVector( const ArrayView<T> &av );


#endif // __sun


template<class T>
std::vector<T> createVector( const ArrayView<const T> &av );


template<class T>
bool is_null( const ArrayView<T> &av );


template<class T>
std::ostream& operator<<( std::ostream& out, const ArrayView<T>& av );


template<class T2, class T1>
ArrayView<T2> av_reinterpret_cast(const ArrayView<T1>& p1);


} // end namespace Teuchos


//
// Inline members
//


// ToDo: Fill in!


#endif  // TEUCHOS_ARRAY_VIEW_DECL_HPP

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