WalshFunction.h

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#ifndef CARMA_UTIL_WALSHFUNCTION_H
#define CARMA_UTIL_WALSHFUNCTION_H


#include <vector>

   
namespace carma {
    namespace util {

class WalshFunction
{
 
public:
    WalshFunction(int nStates);
    
    virtual ~WalshFunction();
    
    bool getValue(int function, int value) const; 

    void dump(bool whitespace = true) const; 

    void graph() const; 
   
private:
    // Hide default constructor
    WalshFunction();
    int nStates_ ;
    std::vector<bool> val_;
    int width_;
    // The generation algorithm requires a function that returns +1, -1
    // and zero when the index is out of range
    int getValueTriState(int function, int value) const; 
};


} }  // End namespace carma::util 



#endif  // CARMA_UTIL_WALSHFUNCTION_H