BDate: do not use strftime

Using BDateFimeFormat avoids going through libroot and up again to ICU
throuhg the locale add-on. Moreover, it uses the Locale settings
directly instead of relying on the LC_* environment variables.

Fixes day names in Web+ history menu always showing in english. Tnaks to
Oco for noticing!

Change-Id: I0c7f321a6147e8f5ab31f82de836c5ad23bb321b
Reviewed-on: https://review.haiku-os.org/650
Reviewed-by: waddlesplash <waddlesplash@gmail.com>

HaikuDepot; date formatting and location header handling

The existing HTTP header date format handling code is employed
rather than using specific logic for HD. Also the "Location"
header handling is changed to work better for non-absolute
URLs arriving in this header value on a redirect. Both
suggestions from Adrien.

BDate: added time_t constructor.

* This class is pretty much useless as it is.

Add setters to BDate and BCalendarView

* BDate setters don't perform any validation, use with caution.
* BCalendarView setters do perform validation checks, and will adjust
the day so it fits the requested month or year.
* Add tests for the BCalendarView setters.

BDateFormat: improve API

* Use a reference rather than a pointer for the output string, removing
the need for NULL checks (which were missing, anyway)
* Adjust callers to that change
* Add new Format variant taking a BDate argument

Style fixes to Support Kit files

SetTime_t: Use the sign-fixed modulo we computed

* In C++03 and earlier, the sign of the modulo result is implementation
defined (this was fixed in C++11).
* Setting a negative time is not what we want here, so make sure we use
the proper value.

BDateTime: Time_T functions return or take a time_t

* They used an unsigned int, which led to overflows when trying to set
them to a time before January 1st, 1970 (local time)
* Some things use January 1st, 1970, GMT (or UTC) as a reference point.
In my timezone this leads to such a negative date. An example is cookie
expiration dates which are set to this date to expire them immediately.
Spotted by Opera testsuite.
* This makes the method unuseable for dates after 2036 (signed 32-bit
time_t will overflow then. This gives us just 33 years to switch to a
64-bit time_t. In te meantime, please try using other methods to set the
date and time for BDateTime objects if you need to go this far.

Fix clamping in BDate::AddMonths():
* use _DaysInMonth() instead of DaysInMonth(), as the latter only works
for valid dates, which we do not have if the day needs to be clamped
to the maximum value for the current month


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@42719 a95241bf-73f2-0310-859d-f6bbb57e9c96

Moved Easter holidays methods to a Holiday class, an hopefully better place.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@40125 a95241bf-73f2-0310-859d-f6bbb57e9c96

Ooops. Fix AscensionDay and PentecostDay.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@40117 a95241bf-73f2-0310-859d-f6bbb57e9c96

* changed some methods to static as that's what they are in the end.
* added some methods to find out easter sunday, ascension and pentecost days.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@40116 a95241bf-73f2-0310-859d-f6bbb57e9c96

* fix oversight that gmtime() and localtime() may return NULL, which would lead
to a crash


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@38143 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Added copy constructors.
* Let the AddHours(), Add*() return itself, so that they can be chained.
* Made the previous *Name() methods static and added non-static versions that
take the day/month of the object.
* Make BDateTime::Date/Time() return references (const or non-const).
* Fixed the BDateTime comparison operators.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@35894 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Indentation update in DateTime.h
* Extended BTime, BDate and BDateTime with archiving functionality.
* Adjusted code which uses these classes, since including DateTime.h
already imports the classes from the BPrivate namespace.
* Moved DateTime.h into Support Kit. It is still in the BPrivate namespace,
as I am uncertain what to do with time_type and diff_type. I'd favor
moving the constants into the classes itself. Possibly removing the B_
prefix from them. Feedback welcome.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@35772 a95241bf-73f2-0310-859d-f6bbb57e9c96

BDate: added time_t constructor.

* This class is pretty much useless as it is.

Add setters to BDate and BCalendarView

* BDate setters don't perform any validation, use with caution.
* BCalendarView setters do perform validation checks, and will adjust
the day so it fits the requested month or year.
* Add tests for the BCalendarView setters.

BDateFormat: improve API

* Use a reference rather than a pointer for the output string, removing
the need for NULL checks (which were missing, anyway)
* Adjust callers to that change
* Add new Format variant taking a BDate argument

Style fixes to Support Kit files

SetTime_t: Use the sign-fixed modulo we computed

* In C++03 and earlier, the sign of the modulo result is implementation
defined (this was fixed in C++11).
* Setting a negative time is not what we want here, so make sure we use
the proper value.

BDateTime: Time_T functions return or take a time_t

* They used an unsigned int, which led to overflows when trying to set
them to a time before January 1st, 1970 (local time)
* Some things use January 1st, 1970, GMT (or UTC) as a reference point.
In my timezone this leads to such a negative date. An example is cookie
expiration dates which are set to this date to expire them immediately.
Spotted by Opera testsuite.
* This makes the method unuseable for dates after 2036 (signed 32-bit
time_t will overflow then. This gives us just 33 years to switch to a
64-bit time_t. In te meantime, please try using other methods to set the
date and time for BDateTime objects if you need to go this far.

Fix clamping in BDate::AddMonths():
* use _DaysInMonth() instead of DaysInMonth(), as the latter only works
for valid dates, which we do not have if the day needs to be clamped
to the maximum value for the current month


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@42719 a95241bf-73f2-0310-859d-f6bbb57e9c96

Moved Easter holidays methods to a Holiday class, an hopefully better place.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@40125 a95241bf-73f2-0310-859d-f6bbb57e9c96

Ooops. Fix AscensionDay and PentecostDay.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@40117 a95241bf-73f2-0310-859d-f6bbb57e9c96

* changed some methods to static as that's what they are in the end.
* added some methods to find out easter sunday, ascension and pentecost days.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@40116 a95241bf-73f2-0310-859d-f6bbb57e9c96

* fix oversight that gmtime() and localtime() may return NULL, which would lead
to a crash


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@38143 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Added copy constructors.
* Let the AddHours(), Add*() return itself, so that they can be chained.
* Made the previous *Name() methods static and added non-static versions that
take the day/month of the object.
* Make BDateTime::Date/Time() return references (const or non-const).
* Fixed the BDateTime comparison operators.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@35894 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Indentation update in DateTime.h
* Extended BTime, BDate and BDateTime with archiving functionality.
* Adjusted code which uses these classes, since including DateTime.h
already imports the classes from the BPrivate namespace.
* Moved DateTime.h into Support Kit. It is still in the BPrivate namespace,
as I am uncertain what to do with time_type and diff_type. I'd favor
moving the constants into the classes itself. Possibly removing the B_
prefix from them. Feedback welcome.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@35772 a95241bf-73f2-0310-859d-f6bbb57e9c96