numericLimits.hpp

/*
 * CoDiPack, a Code Differentiation Package
 *
 * Copyright (C) 2015-2024 Chair for Scientific Computing (SciComp), University of Kaiserslautern-Landau
 * Homepage: http://scicomp.rptu.de
 * Contact:  Prof. Nicolas R. Gauger (codi@scicomp.uni-kl.de)
 *
 * Lead developers: Max Sagebaum, Johannes Blühdorn (SciComp, University of Kaiserslautern-Landau)
 *
 * This file is part of CoDiPack (http://scicomp.rptu.de/software/codi).
 *
 * CoDiPack 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 3 of the
 * License, or (at your option) any later version.
 *
 * CoDiPack 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 CoDiPack.
 * If not, see <http://www.gnu.org/licenses/>.
 *
 * For other licensing options please contact us.
 *
 * Authors:
 *  - SciComp, University of Kaiserslautern-Landau:
 *    - Max Sagebaum
 *    - Johannes Blühdorn
 *    - Former members:
 *      - Tim Albring
 */
#pragma once
 
#include <limits>
 
#include "../config.h"
#include "../misc/macros.hpp"
#include "realTraits.hpp"
 
namespace codi {
 
  template<typename T_Tape>
  struct ActiveType;
 
  template<typename T_Tape, typename T_ParallelToolbox>
  struct ParallelActiveType;
}
 
namespace std {
 
  template<typename Type>
  struct codi_numeric_limits {
    private:
      using Passive = codi::RealTraits::PassiveReal<Type>;
 
    public:
 
      static bool constexpr is_specialized = true;  
      static Type constexpr min() {
        return Type(numeric_limits<Passive>::min());
      }  
      static Type constexpr max() {
        return Type(numeric_limits<Passive>::max());
      }  
      static Type constexpr lowest() {
        return Type(numeric_limits<Passive>::lowest());
      }                                                                        
      static int constexpr digits = numeric_limits<Passive>::digits;           
      static int constexpr digits10 = numeric_limits<Passive>::digits10;       
      static bool constexpr is_signed = numeric_limits<Passive>::is_signed;    
      static bool constexpr is_integer = numeric_limits<Passive>::is_integer;  
      static bool constexpr is_exact = numeric_limits<Passive>::is_exact;      
      static int constexpr radix = numeric_limits<Passive>::radix;             
      static Type constexpr epsilon() {
        return Type(numeric_limits<Passive>::epsilon());
      }  
      static Type constexpr round_error() {
        return Type(numeric_limits<Passive>::round_error());
      }  
 
      static int constexpr min_exponent = numeric_limits<Passive>::min_exponent;      
      static int constexpr min_exponent10 = numeric_limits<Passive>::max_exponent10;  
      static int constexpr max_exponent = numeric_limits<Passive>::max_exponent;      
      static int constexpr max_exponent10 = numeric_limits<Passive>::max_exponent10;  
 
      static bool constexpr has_infinity = numeric_limits<Passive>::has_infinity;            
      static bool constexpr has_quiet_NaN = numeric_limits<Passive>::has_quiet_NaN;          
      static bool constexpr has_signaling_NaN = numeric_limits<Passive>::has_signaling_NaN;  
      static float_denorm_style constexpr has_denorm = numeric_limits<Passive>::has_denorm;  
      static bool constexpr has_denorm_loss = numeric_limits<Passive>::has_denorm_loss;      
      static Type constexpr infinity() {
        return Type(numeric_limits<Passive>::infinity());
      }  
      static Type constexpr quiet_NaN() {
        return Type(numeric_limits<Passive>::quiet_NaN());
      }  
      static Type constexpr signaling_NaN() {
        return Type(numeric_limits<Passive>::signaling_NaN());
      }  
      static Type constexpr denorm_min() {
        return Type(numeric_limits<Passive>::denorm_min());
      }  
 
      static bool constexpr is_iec559 = numeric_limits<Passive>::is_iec559;    
      static bool constexpr is_bounded = numeric_limits<Passive>::is_bounded;  
      static bool constexpr is_modulo = numeric_limits<Passive>::is_modulo;    
 
      static bool constexpr traps = numeric_limits<Passive>::traps;                           
      static bool constexpr tinyness_before = numeric_limits<Passive>::tinyness_before;       
      static float_round_style constexpr round_style = numeric_limits<Passive>::round_style;  
  };
 
  template<typename Tape>
  struct numeric_limits<codi::ActiveType<Tape>> : codi_numeric_limits<codi::ActiveType<Tape>> {};
 
  template<typename Tape, typename ParallelToolbox>
  struct numeric_limits<codi::ParallelActiveType<Tape, ParallelToolbox>>
      : codi_numeric_limits<codi::ParallelActiveType<Tape, ParallelToolbox>> {};
 
  template<typename Tape>
  struct numeric_limits<codi::ActiveTypeStatelessTape<Tape>>
      : codi_numeric_limits<codi::ActiveTypeStatelessTape<Tape>> {};
}