tdf#71007: Pass also fractional seconds to/from Firebird

We know that ISC_TIME is simply in units of
seconds/ISC_TIME_SECONDS_PRECISION.

Change-Id: I2896f53c2d32a773c535e19f55dd1314abd18ec9
Reviewed-on: https://gerrit.libreoffice.org/47266Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Tor Lillqvist <tml@collabora.com>

connectivity/source/drivers/firebird/PreparedStatement.cxx

-/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
 /*
  * This file is part of the LibreOffice project.
  *
@@ -462,6 +462,10 @@ void SAL_CALL OPreparedStatement::setTime( sal_Int32 nIndex, const css::util::Ti
     ISC_TIME aISCTime;
     isc_encode_sql_time(&aCTime, &aISCTime);
 
+    // Here we "know" that ISC_TIME is simply in units of seconds/ISC_TIME_SECONDS_PRECISION with no
+    // other funkiness, so we can simply add the fraction of a second.
+    aISCTime += rTime.NanoSeconds / (1000000000 / ISC_TIME_SECONDS_PRECISION);
+
     setValue< ISC_TIME >(nIndex, aISCTime, SQL_TYPE_TIME);
 }
 
@@ -478,6 +482,9 @@ void SAL_CALL OPreparedStatement::setTimestamp(sal_Int32 nIndex, const DateTime&
     ISC_TIMESTAMP aISCTimestamp;
     isc_encode_timestamp(&aCTime, &aISCTimestamp);
 
+    // As in previous function
+    aISCTimestamp.timestamp_time += rTimestamp.NanoSeconds / (1000000000 / ISC_TIME_SECONDS_PRECISION);
+
     setValue< ISC_TIMESTAMP >(nIndex, aISCTimestamp, SQL_TIMESTAMP);
 }
 

connectivity/source/drivers/firebird/ResultSet.cxx

-/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
 /*
  * This file is part of the LibreOffice project.
  *
@@ -526,9 +526,12 @@ Time OResultSet::retrieveValue(const sal_Int32 nColumnIndex, const ISC_SHORT /*n
         struct tm aCTime;
         isc_decode_sql_time(&aISCTime, &aCTime);
 
-        // first field is nanoseconds -- not supported in firebird or struct tm.
+        // First field is nanoseconds.
         // last field denotes UTC (true) or unknown (false)
-        return Time(0, aCTime.tm_sec, aCTime.tm_min, aCTime.tm_hour, false);
+        // Here we "know" that ISC_TIME is simply in units of seconds/ISC_TIME_SECONDS_PRECISION
+        // with no other funkiness, so we can get the fractional seconds easily.
+        return Time((aISCTime % ISC_TIME_SECONDS_PRECISION) * (1000000000 / ISC_TIME_SECONDS_PRECISION),
+                    aCTime.tm_sec, aCTime.tm_min, aCTime.tm_hour, false);
     }
     else
     {
@@ -546,7 +549,8 @@ DateTime OResultSet::retrieveValue(const sal_Int32 nColumnIndex, const ISC_SHORT
         struct tm aCTime;
         isc_decode_timestamp(&aISCTimestamp, &aCTime);
 
-        return DateTime(0, //nanoseconds, not supported
+        // Ditto here, see comment in previous function about ISC_TIME and ISC_TIME_SECONDS_PRECISION.
+        return DateTime((aISCTimestamp.timestamp_time % ISC_TIME_SECONDS_PRECISION) * (1000000000 / ISC_TIME_SECONDS_PRECISION), //nanoseconds
                         aCTime.tm_sec,
                         aCTime.tm_min,
                         aCTime.tm_hour,