helper.hpp

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#ifndef RAD_HELPER_HPP
#define RAD_HELPER_HPP
 
//#include <cstring>
#include <stdio.h>
#include <sys/time.h>
#include <sstream>
#include <string>
 
namespace rad {
 
class Helper {
   public:
    static constexpr const char* INTROOT = "INTROOT";
    static constexpr const char* CFGPATH = "CFGPATH";
 
    static std::string GetHostname(const bool with_domain = false);
 
    static std::string FindFile(const std::string& filename);
    static bool FileExists(const std::string& filename);
    static std::string GetEnvVar(const std::string& key);
    static std::string CreateIdentity();
    static void SplitAddrPort(const std::string& addr_port, std::string& addr, int& port);
    static std::string GetVersion();
 
    Helper() = delete;
    Helper(const Helper&) = delete;
    Helper& operator=(const Helper&) = delete;
};
 
inline static double GetTime() {
    struct timeval tp;
    gettimeofday(&tp, nullptr);
    return (tp.tv_sec + (tp.tv_usec / 1e6));
}
 
inline static std::string ConvertToIsoTime(const double timestamp) {
    char tmp_iso_time[80];
    long seconds = timestamp;
    strftime(tmp_iso_time, 80, "%Y-%m-%dT%H:%M:%S", localtime(&seconds));
    char tmp_mus[80];
    snprintf(tmp_mus, sizeof(tmp_mus), "%.6f", (timestamp - seconds));
    char iso_time[87];
    snprintf(iso_time, sizeof(iso_time), "%s.%s", tmp_iso_time,
             std::string(tmp_mus).substr(2).c_str());
    return iso_time;
}
 
inline static std::string GetTimestamp() { return rad::ConvertToIsoTime(rad::GetTime()); }
 
}  // namespace rad
 
#endif  // RAD_HELPER_HPP