Log.h

#ifndef Log_h
#define Log_h
#include "Primitive.h"
#include <cmath>
 
namespace Tree {
namespace Primitives {
 
class Log : public Primitive
{
    public:
        Log(void)
        {
            nArguments_ = 1;
            name_ = "log";
        }
 
        ~Log(void)
        { }
 
        void execute(void* result, Tree& tree)
        {
            double& arg = *(double*)result;
            getNextArgument(&arg, tree);
            if (arg > 0) {
                arg = log10(arg);
            }
            else {
                arg = 0;
            }
        }
};
 
}
}
 
#endif