Make g_date_time_format() support some useful format modifiers from
strftime(). This commit adds support for the POSIX 'O' modifier
(alternative digits), as well as the -/_/0 padding modifiers, which
are a GNU strftime() extension.
https://bugzilla.gnome.org/show_bug.cgi?id=648678
The 12h mode hour format is computed by taking the
24h mode hour format modulo 12.
The conversion results in 12 noon getting erroneously
converted to 0.
This commit makes noon get the same special handling
as midnight.
No functionality changes here.
Vastly simplify the algorithm for calculating the day of the week.
Fix the documentation (which is incorrectly stating that 1 means
Sunday) and clarify that the number we return is in line with ISO 8601
week day numbering.
If a DateTime gets modified to cross the DST state from its previous
state then we want to update the DateTime to compensate for the new
offset.
In other words, if we have a DateTime defined as:
DateTime({ y: 2009, m: 8, d: 15, hh: 3, mm: 0, tz: 'Europe/London' });
and we add six months to it, the hour must be changed to 60 minutes
behind, as the DST comes into effect.
https://bugzilla.gnome.org/show_bug.cgi?id=50076
Otherwise we'll have to do:
dt = g_date_time_new_full (Y, M, D, h, m, s, tz);
tmp = g_date_time_add_usec (dt, usec);
g_date_time_unref (dt);
dt = tmp;
With its additional allocations.
https://bugzilla.gnome.org/show_bug.cgi?id=50076
Timezone handling is complicated. Really complicated.
In order to simplify it a little bit, we need to expose the GTimeZone
structure.
First of all, we allow creating time zone information directly from the
offset and the DST state, and then pass it to the g_date_time_new_full()
constructor. We also need to clean up the mess that is UTC-vs.-localtime
for the other constructors.
We also allow creating a GTimeZone from the Olson zoneinfo database
names; a time zone created like this will be "floating": it will just
reference the zoneinfo file - which are mmap()'ed, kept in a cache and
refcounted. Once the GTimeZone has been associated with a GDateTime, it
will be "anchored" to it: the offset will be resolved, as well as the
DST state.
https://bugzilla.gnome.org/show_bug.cgi?id=50076
The current msgctxt string 'GDateTime" lead to the unability to
differentiate between the full and abbreviated name for May.
Therefore, the msgctxt strings have been changed to
'full month name'
'abbreviated month name'
'full weekday name'
'abbreviated weekday name'
This is a string change, but all translations have been updated
using an sed script.
Bug 629429
Use Proleptic Gregorian calendar instead of the Julian calendar
as the internal representation.
https://bugzilla.gnome.org/show_bug.cgi?id=50076
Signed-off-by: Emmanuele Bassi <ebassi@linux.intel.com>
Previously, the format string was iterated many times by
walking to the given offset in the string repeatedly.
This patch instead walks the string using g_utf8_next_char().
Additionally, the character for lookups was a char and could
loose content. This uses gunichar instead.
https://bugzilla.gnome.org/show_bug.cgi?id=50076
These were left over from when the inline functions where implemented
as macros. They are no longer needed and where clashing with the
global __year anyway.
https://bugzilla.gnome.org/show_bug.cgi?id=50076
The current implementation of g_date_time_add_full() creates multiple
GDateTime temporary objects and unrefs them immediately; even with the
slice allocator this could result in a performance bottleneck,
especially if the atomic integer operations fall back to slow paths.
We can isolate the components of the add_full() operation and create
internal modifiers that operate on an existing GDateTime; this brings
down the number of GDateTime copies created from six to one.
While at it, the test suite for add_full() should have more checks for
roll-over of months and days.
Signed-off-by: Emmanuele Bassi <ebassi@linux.intel.com>
GDateTime is an opaque data type containing a date and time
representation. It's immutable once created and reference
counted.
https://bugzilla.gnome.org/show_bug.cgi?id=50076
Based on the code by: Christian Hergert <chris@dronelabs.com>
Signed-off-by: Emmanuele Bassi <ebassi@linux.intel.com>
