InputParser.hpp

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#pragma once
#include <iostream>
#include <sstream>
#include "boost/regex.hpp"
#include "lib/Log.hpp"
 
namespace InputParser
{
    inline double stringToDouble(const std::string &input)
    {
        //debug output
        boost::regex number("[-\\.\\d]+");
        bool debugFlag = !boost::regex_match(input, number);
        std::string parsedString(input);
 
        boost::regex squareRoot("sqrt\\(([\\.\\d]+)\\)");
        boost::regex multDiv("([\\.\\d]+)([\\*/])([\\.\\d]+)");
        boost::smatch match;
        std::stringstream replacement;
        replacement << std::fixed << std::setprecision(20);
        //parse sqrt
        while (boost::regex_search(parsedString, match, squareRoot))
        {
            replacement.str("");
            replacement << match.prefix() << sqrt(std::stod(match.str(1))) << match.suffix();
            parsedString = replacement.str();
        }
        //parse multiplication and division
        while (boost::regex_search(parsedString, match, multDiv))
        {
            replacement.str("");
            replacement << match.prefix();
            if (match.str(2) == "*") replacement << std::stod(match.str(1)) * std::stod(match.str(3));
            else replacement << std::stod(match.str(1)) / std::stod(match.str(3));
            replacement << match.suffix();
            parsedString = replacement.str();
        }
 
        if (debugFlag) Log::log << Log::LogLevel::Debug << "parsed input string " << input << " to " << parsedString << Log::endl;
        return std::stod(parsedString);
    }
 
    inline float stringToFloat(const std::string &input)
    {
        return float(stringToDouble(input));
    }
}