Teuchos_OrdinalTraits.hpp

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// @HEADER
// ***********************************************************************
//
//                    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
// published by the Free Software Foundation; either version 2.1 of the
// License, or (at your option) any later version.
//
// 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)
//
// ***********************************************************************
// @HEADER

// Kris
// 07.08.03 -- Move into Teuchos package/namespace

#ifndef _TEUCHOS_ORDINALTRAITS_HPP_
#define _TEUCHOS_ORDINALTRAITS_HPP_

#include "Teuchos_ConfigDefs.hpp"
#include <limits>

/* This is the default structure used by OrdinalTraits<T> to produce a compile time
   error when the specialization does not exist for type <tt>T</tt>.
*/
namespace Teuchos {

template<class T>
struct UndefinedOrdinalTraits
{
  static inline T notDefined() { return T::this_type_is_missing_a_specialization(); }
};
  
template<class T>
struct OrdinalTraits {

  static const bool hasMachineParameters = false;
    
  static inline T zero()                     { return UndefinedOrdinalTraits<T>::notDefined(); }

  static inline T one()                      { return UndefinedOrdinalTraits<T>::notDefined(); }


  static inline T max()                  { return UndefinedOrdinalTraits<T>::notDefined(); }

  static inline T invalid()                  { return UndefinedOrdinalTraits<T>::notDefined(); }

  static inline std::string name()           { return UndefinedOrdinalTraits<T>::notDefined(); }
};
  
#ifndef DOXYGEN_SHOULD_SKIP_THIS

template<>
struct OrdinalTraits<char> {
  static const bool hasMachineParameters = false;
  static inline char zero()                   {return(0);}
  static inline char one()                    {return(1);}
  static inline char invalid()                {return(-1);}
  static inline char max()                    {return(std::numeric_limits<char>::max());}
  static inline std::string name()            {return("char");}
};

template<>
struct OrdinalTraits<short int> {
  static const bool hasMachineParameters = false;
  static inline short int zero()              {return(0);}
  static inline short int one()               {return(1);}
  static inline short int invalid()           {return(-1);}
  static inline short int max()               {return(std::numeric_limits<short int>::max());}
  static inline std::string name()            {return("short int");}
};

template<>
struct OrdinalTraits<int> {
  static const bool hasMachineParameters = false;
  static inline int zero()                   {return(0);}
  static inline int one()                    {return(1);}
  static inline int invalid()                {return(-1);}
  static inline int max()                    {return(std::numeric_limits<int>::max());}
  static inline std::string name()           {return("int");}
};

template<>
struct OrdinalTraits<unsigned int> {
  static const bool hasMachineParameters = false;
  static inline unsigned int zero()                   {return(0);}
  static inline unsigned int one()                    {return(1);}
  static inline unsigned int invalid()                {return(std::numeric_limits<unsigned int>::max());}
  static inline unsigned int max()                    {return(std::numeric_limits<unsigned int>::max()-1);}
  static inline std::string name()           {return("unsigned int");}
};

template<>
struct OrdinalTraits<long int> {
  static const bool hasMachineParameters = false;
  static inline long int zero()              {return(static_cast<long int>(0));}
  static inline long int one()               {return(static_cast<long int>(1));}
  static inline long int invalid()           {return(static_cast<long int>(-1));}
  static inline long int max()               {return(std::numeric_limits<long int>::max());}
  static inline std::string name()           {return("long int");}
};

template<>
struct OrdinalTraits<long unsigned int> {
  static const bool hasMachineParameters = false;
  static inline long unsigned int zero()              {return(static_cast<long unsigned int>(0));}
  static inline long unsigned int one()               {return(static_cast<long unsigned int>(1));}
  static inline long unsigned int invalid()           {return(std::numeric_limits<long unsigned int>::max());}
  static inline long unsigned int max()               {return(std::numeric_limits<long unsigned int>::max()-1);}
  static inline std::string name()           {return("long unsigned int");}
};

#ifdef HAVE_TEUCHOS_LONG_LONG_INT
template<>
struct OrdinalTraits<long long int> {
  static const bool hasMachineParameters = false;
  static inline long long int zero()          {return(static_cast<long long int>(0));}
  static inline long long int one()           {return(static_cast<long long int>(1));}
  static inline long long int invalid()       {return(static_cast<long long int>(-1));}
  static inline long long int max()           {return(LLONG_MAX);}
  static inline std::string name()            {return("long long int");}
};
#endif // HAVE_TEUCHOS_LONG_LONG_INT

#endif // DOXYGEN_SHOULD_SKIP_THIS

} // namespace Teuchos

#endif // _TEUCHOS_ORDINALTRAITS_HPP_