Adding some time64 API functions

libgnucash/engine/Transaction.c

@@ -2458,6 +2458,12 @@ xaccTransGetDateDueTS (const Transaction *trans, Timespec *ts)
         xaccTransGetDatePostedTS (trans, ts);
 }
 
+time64
+xaccTransRetDateDueTime64 (const Transaction *trans)
+{
+    return xaccTransRetDateDueTS (trans).tv_sec;
+}
+
 Timespec
 xaccTransRetDateDueTS (const Transaction *trans)
 {

libgnucash/engine/Transaction.h

@@ -674,6 +674,7 @@ Timespec      xaccTransRetDateEnteredTS (const Transaction *trans);
 
 /** Dates and txn-type for A/R and A/P "invoice" postings */
 Timespec      xaccTransRetDateDueTS (const Transaction *trans);
+time64        xaccTransRetDateDueTime64 (const Transaction *trans);
 /** Dates and txn-type for A/R and A/P "invoice" postings */
 void	      xaccTransGetDateDueTS (const Transaction *trans, Timespec *ts);
 /** @} */

libgnucash/engine/engine.i

@@ -208,6 +208,7 @@ SplitList * qof_query_run_subquery (QofQuery *q, const QofQuery *q);
 %include <gnc-numeric.h>
 
 Timespec timespecCanonicalDayTime(Timespec t);
+time64 time64CanonicalDayTime(time64 t);
 
 %include <gnc-budget.h>
 

libgnucash/engine/gnc-date.cpp

@@ -486,6 +486,15 @@ timespecCanonicalDayTime(Timespec t)
     return retval;
 }
 
+time64
+time64CanonicalDayTime (time64 t)
+{
+    struct tm tm;
+    gnc_localtime_r(&t, &tm);
+    gnc_tm_set_day_middle(&tm);
+    return gnc_mktime (&tm);
+}
+
 /* NB: month is 1-12, year is 0001 - 9999. */
 int gnc_date_get_last_mday (int month, int year)
 {

libgnucash/engine/gnc-date.h

@@ -335,6 +335,8 @@ Timespec timespec_abs(const Timespec *t);
  * returning a Timespec. */
 Timespec timespecCanonicalDayTime(Timespec t);
 
+time64 time64CanonicalDayTime(time64 t);
+
 /** Returns the current clock time as a Timespec, taken from time(2). */
 Timespec timespec_now (void);