utils/timeutils.h

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#ifndef UTILS_TIMEUTILS_H_
#define UTILS_TIMEUTILS_H_

#include <ctime>
#include <string>

namespace utils
{

class TimeUtils
{
public:
        static std::string timeAsString(const std::string& formatString, time_t time)
        {
                const struct tm *timeinfo = localtime(&time);

                std::string buffer;
                buffer.resize(formatString.size()*2);
                size_t len = strftime(&buffer[0], buffer.size(), formatString.c_str(), timeinfo);
                while (len == 0) {
                        buffer.resize(buffer.size()*2);
                        len = strftime(&buffer[0], buffer.size(), formatString.c_str(), timeinfo);
                }
                buffer.resize(len);
                return buffer;
        }

        static std::string timeAsString(const std::string& formatString)
        {
                return timeAsString(formatString, time(0L));
        }
};

}

#endif /* UTILS_TIMEUTILS_H_ */