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epsilon-master/apps/sequence/cache_context.cpp 1.76 KB
6663b6c9   adorian   projet complet av...
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  #include "cache_context.h"
  #include <cmath>
  
  using namespace Poincare;
  
  namespace Sequence {
  
  template<typename T>
  CacheContext<T>::CacheContext(Context * parentContext) :
    VariableContext<T>('n', parentContext),
    m_values{{Approximation<T>(NAN), Approximation<T>(NAN)},
      {Approximation<T>(NAN), Approximation<T>(NAN)}}
  {
  }
  
  template<typename T>
  const Expression * CacheContext<T>::expressionForSymbol(const Symbol * symbol) {
    if (symbol->name() == Symbol::SpecialSymbols::un || symbol->name() == Symbol::SpecialSymbols::un1 ||
        symbol->name() == Symbol::SpecialSymbols::vn || symbol->name() == Symbol::SpecialSymbols::vn1) {
      return &m_values[nameIndexForSymbol(symbol)][rankIndexForSymbol(symbol)];
    }
    return VariableContext<T>::expressionForSymbol(symbol);
  }
  
  template<typename T>
  void CacheContext<T>::setValueForSymbol(T value, const Poincare::Symbol * symbol) {
    m_values[nameIndexForSymbol(symbol)][rankIndexForSymbol(symbol)] = Approximation<T>(value);
  }
  
  template<typename T>
  int CacheContext<T>::nameIndexForSymbol(const Poincare::Symbol * symbol) {
    switch (symbol->name()) {
      case Symbol::SpecialSymbols::un:
        return 0;
      case Symbol::SpecialSymbols::un1:
        return 0;
      case Symbol::SpecialSymbols::vn:
        return 1;
      case Symbol::SpecialSymbols::vn1:
        return 1;
      default:
        return 0;
    }
  }
  
  template<typename T>
  int CacheContext<T>::rankIndexForSymbol(const Poincare::Symbol * symbol) {
    switch (symbol->name()) {
      case Symbol::SpecialSymbols::un:
        return 0;
      case Symbol::SpecialSymbols::un1:
        return 1;
      case Symbol::SpecialSymbols::vn:
        return 0;
      case Symbol::SpecialSymbols::vn1:
        return 1;
      default:
        return 0;
    }
  }
  
  template class CacheContext<float>;
  template class CacheContext<double>;
  
  }