Resolves: tdf#100452 class Date full (BCE,CE) proleptic Gregorian calendar

... implementing signed years with year 0 gap.
Date(31,12,-1) last day BCE
Date(1,1,1) first day CE

New class Date member functions:
* AddYears(sal_Int16) to be used instead of
aDate.SetYear(aDate.GetYear()+sal_Int16) to handle year 0 gap.
* convenience GetNextYear() to be used insted of GetYear()+1
* convenience GetPrevYear() to be used insted of GetYear()-1
* AddMonths(sal_Int32)
* operator=(const css::util::Date&)

New class DateTime member functions:
* operator=(const css::util::DateTime&)

Made some conversion ctors explicit, specifically Date(sal_Int32)

Adapted hopefully all places that used a sal_uInt16 year to use
sal_Int16 where appropriate.

Eliminated some quirks in date handling found on the fly.

Added era handling to i18npool icu calendar setting interface, which
missing was responsible for 0001-01-01 entered in Calc being set as
-0001-01-01, hence subtracting one day resulted in -0002-12-31.

Change-Id: I77b39fba9599ebd5067d7864f6c9ebe01f6f578f
Reviewed-on: https://gerrit.libreoffice.org/27049
Reviewed-by: Eike Rathke <erack@redhat.com>
Tested-by: Jenkins <ci@libreoffice.org>

1 files changed, 5 insertions, 3 deletions

diff --git a/solenv/gdb/libreoffice/tl.py b/solenv/gdb/libreoffice/tl.py
index 87e4924e0d99..2e096fc8d26c 100644
--- a/solenv/gdb/libreoffice/tl.py
+++ b/solenv/gdb/libreoffice/tl.py
@@ -112,10 +112,12 @@ class DateImpl(DateTimeImpl):
 
     @staticmethod
     def parse(val):
-        date = val['nDate']
-        d = date % 100
-        m = (date / 100) % 100
+        date = val['mnDate']
         y = date / 10000
+        if date < 0:
+            date = -date
+        m = (date / 100) % 100
+        d = date % 100
         return DateImpl(y, m, d)
 
 class DatePrinter(object):