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115 lines
5.2 KiB
115 lines
5.2 KiB
/*===========================================================================*\
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* *
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* OpenFlipper *
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* Copyright (C) 2001-2011 by Computer Graphics Group, RWTH Aachen *
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* www.openflipper.org *
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* *
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*---------------------------------------------------------------------------*
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* This file is part of OpenFlipper. *
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* *
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* OpenFlipper is free software: you can redistribute it and/or modify *
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* it under the terms of the GNU Lesser General Public License as *
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* published by the Free Software Foundation, either version 3 of *
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* the License, or (at your option) any later version with the *
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* following exceptions: *
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* *
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* If other files instantiate templates or use macros *
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* or inline functions from this file, or you compile this file and *
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* link it with other files to produce an executable, this file does *
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* not by itself cause the resulting executable to be covered by the *
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* GNU Lesser General Public License. This exception does not however *
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* invalidate any other reasons why the executable file might be *
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* covered by the GNU Lesser General Public License. *
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* *
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* OpenFlipper is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU Lesser General Public License for more details. *
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* *
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* You should have received a copy of the GNU LesserGeneral Public *
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* License along with OpenFlipper. If not, *
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* see <http://www.gnu.org/licenses/>. *
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* *
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\*===========================================================================*/
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/*===========================================================================*\
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* *
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* $Revision: 10745 $ *
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* $Author: moebius $ *
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* $Date: 2011-01-26 10:23:50 +0100 (Mi, 26. Jan 2011) $ *
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* *
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\*===========================================================================*/
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//=============================================================================
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//
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// CLASS NumLimitsT
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//
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//=============================================================================
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#ifndef ACG_NUMLIMITS_HH
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#define ACG_NUMLIMITS_HH
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//#ifndef WIN32
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# undef min
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# undef max
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//#endif
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//== INCLUDES =================================================================
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#include <limits.h>
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#include <float.h>
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//== NAMESPEACES ==============================================================
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namespace ACG {
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//== CLASS DEFINITION =========================================================
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/** \class NumLimitsT NumLimitsT.hh <ACG/Utils/NumLimitsT.hh
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This class provides the maximum and minimum values a certain
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scalar type (\c int, \c float, or \c double) can store. You can
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use it like this:
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\code
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#include <ACG/Utils/NumLimitsT.hh>
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int float_min = ACG::NumLimitsT<float>::min();
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float double_max = ACG::NumLimitsT<double>::max();
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\endcode
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\note This functionality should be provided by
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std::numeric_limits. This template does not exist on gcc <=
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2.95.3. The class template NumLimitsT is just a workaround.
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**/
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template <typename Scalar>
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class NumLimitsT
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{
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public:
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/// Return the smallest \em absolte value a scalar type can store.
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static inline Scalar min() { return 0; }
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/// Return the maximum \em absolte value a scalar type can store.
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static inline Scalar max() { return 0; }
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};
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template<> inline int NumLimitsT<int>::min() { return INT_MIN; }
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template<> inline int NumLimitsT<int>::max() { return INT_MAX; }
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template<> inline float NumLimitsT<float>::min() { return FLT_MIN; }
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template<> inline float NumLimitsT<float>::max() { return FLT_MAX; }
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template<> inline double NumLimitsT<double>::min() { return DBL_MIN; }
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template<> inline double NumLimitsT<double>::max() { return DBL_MAX; }
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//=============================================================================
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} // namespace ACG
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//=============================================================================
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#endif // ACG_NUMLIMITS_HH defined
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//=============================================================================
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