time.hpp File Reference

#include <string>
#include <chrono>

Go to the source code of this file.

Functions
const time_point	remwharead::string_to_timepoint (const string &strtime, bool sqlite=false)
	Convert ISO 8601 or SQLite time-string to time_point. More...
const string	remwharead::timepoint_to_string (const time_point &tp, bool sqlite=false)
	Convert time_point to ISO 8601 or SQLite time-string. More...

Function Documentation

string_to_timepoint()

const time_point remwharead::string_to_timepoint	(	const string &	strtime,
		bool	sqlite = false
	)

Convert ISO 8601 or SQLite time-string to time_point.

The SQLite format is YY-MM-DD hh:mm:ss instead of YY-MM-DDThh:mm:ss.

Parameters

strtime	Time string in ISO 8601 or SQLite format.
sqlite	Is the string in SQLite format?

    {
        std::stringstream sstime(strtime);
        struct std::tm tm = {};
        tm.tm_isdst = -1;           // Detect daylight saving time.
        if (sqlite)
        {
            sstime >> std::get_time(&tm, "%Y-%m-%d %T");
        }
        else
        {
            sstime >> std::get_time(&tm, "%Y-%m-%dT%T");
        }
        std::time_t time = timelocal(&tm); // Assume time is local.
        return system_clock::from_time_t(time);
    }

timepoint_to_string()

const string remwharead::timepoint_to_string	(	const time_point &	tp,
		bool	sqlite = false
	)

Convert time_point to ISO 8601 or SQLite time-string.

The SQLite format is YY-MM-DD hh:mm:ss instead of YY-MM-DDThh:mm:ss.

Parameters

time_point	The std::chrono::system_clock::time_point.
sqlite	Is the string in SQLite format?

    {
        constexpr std::uint16_t bufsize = 32;
        std::time_t time = system_clock::to_time_t(tp);
        std::tm *tm;
        tm = std::localtime(&time);

        char buffer[bufsize];
        if (sqlite)
        {
            std::strftime(buffer, bufsize, "%F %T", tm);
        }
        else
        {
            std::strftime(buffer, bufsize, "%FT%T", tm);
        }

        return static_cast<const string>(buffer);
    }