feedc0de/date: A date and time library based on the C++11/14/17 <chrono> header - date

T

Tomasz Kamiński e1099ef3ab Implemented clock_cast function.

Added an clock_time_conversion trait, that should be specialized
with SourceClock and DestClock respectively and provide an function
that convert time_point in SourceClock to equivalent time_point
in DestClock.

This function has following specializations:
1) <sys_clock, utc_clock> - convert sys_time to utc_time
2) <utc_clock, sys_clock> - convert utc_time to sys_time
3) <Clock, sys_clock>     - calls Clock::to_sys if it returns sys_time
4) <Clock, utc_clock>     - calls Clock::to_utc if it returns utc_time
5) <sys_clock, Clock>     - calls Clock::from_sys if it returns time_point<Clock>
5) <utc_clock, Clock>     - calls Clock::from_utc if it returns time_point<Clock>

Implemented an clock_cast<DestClock>(time_point<SourceClock, Dur> st), that
works as follow:
1) If DestClock is same as SourceClock, returns std
2) Otherwise, if clock_conversion<SourceClock, DestClock> available, uses it
3) Otherwise, if tries using clock_conversion<SourceClock, CommClock>
   and clock_conversion<CommClock, DestClock> for CommClock being utc_time
   or sys_time
4) Otherwise, tries using clock_conversion<SourceClock, utc_clock>
   and clock_conversion<sys_clock, DestinationClock> or reversed (firstly
   convert to sys_clock, then to utc_clock) to convert.

2017-11-24 17:55:15 +01:00

include/date

Implemented clock_cast function.

2017-11-24 17:55:15 +01:00

src

Update to accomidate change of iana url #241

2017-11-23 20:25:00 -05:00

test

Update validation.cpp for new directory structure

2017-10-24 12:06:50 -04:00

LICENSE.txt

Add License file

2017-01-26 19:42:42 -05:00

README.md

Update C++ standards proposal status

2017-11-12 06:27:50 -05:00

README.md

Try it out on wandbox!

This is actually several separate C++11/C++14 libraries:

"date.h" is a header-only library which builds upon <chrono>. It adds some new duration types, and new time_point types. It also adds "field" types such as year_month_day which is a struct {year, month, day}. And it provides convenient means to convert between the "field" types and the time_point types.
- Documentation: http://howardhinnant.github.io/date/date.html
- Video: https://www.youtube.com/watch?v=tzyGjOm8AKo
- Slides: http://schd.ws/hosted_files/cppcon2015/43/hinnant_dates.pdf
"tz.h" / "tz.cpp" are a timezone library built on top of the "date.h" library. This timezone library is a complete parser of the IANA timezone database. It provides for an easy way to access all of the data in this database, using the types from "date.h" and <chrono>. The IANA database also includes data on leap seconds, and this library provides utilities to compute with that information as well.
"iso_week.h" is a header-only library built on top of the "date.h" library which implements the ISO week date calendar.
- Documentation: http://howardhinnant.github.io/date/iso_week.html
"julian.h" is a header-only library built on top of the "date.h" library which implements a proleptic Julian calendar which is fully interoperable with everything above.
- Documentation: http://howardhinnant.github.io/date/julian.html
"islamic.h" is a header-only library built on top of the "date.h" library which implements a proleptic Islamic calendar which is fully interoperable with everything above.
- Documentation: http://howardhinnant.github.io/date/islamic.html

"date.h" and "tz.h" are now being proposed for standardization:

Current proposal: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2017/p0355r4.html
Draft revision: http://howardhinnant.github.io/date/d0355r5.html
Status: The proposal was approved by LEWG and forwarded to LWG with the recommendation of targeting C++20 at the Albuquerque, NM meeting in Nov. 2017.

List of projects using this library:

www.safe.com
www.webtoolkit.eu/wt

If you would like your project (or product) on this list, just let me know.