/*----------------------------------------------------------------------
| NPT_DateTime::ToTimeStamp
+---------------------------------------------------------------------*/
NPT_Result
NPT_DateTime::ToTimeStamp(NPT_TimeStamp& timestamp) const
{
// default value
timestamp.SetNanos(0);
// check bounds
NPT_Result result = CheckDate(*this);
if (NPT_FAILED(result)) return result;
// compute the number of days elapsed since 1900
NPT_UInt32 days = ElapsedDaysSince1900(*this);
// compute the number of nanoseconds
NPT_Int64 seconds = (NPT_Int64)days * (24*60*60) +
(NPT_Int64)m_Hours * (60*60) +
(NPT_Int64)m_Minutes * (60) +
(NPT_Int64)m_Seconds;
seconds -= (NPT_Int64)m_TimeZone*60;
// adjust to the number of seconds since 1900
seconds -= (NPT_Int64)NPT_SECONDS_PER_YEAR*70 +
(NPT_Int64)(17*NPT_SECONDS_PER_DAY); // 17 leap year between 1900 and 1970
timestamp.FromNanos(seconds * 1000000000 + m_NanoSeconds);
return NPT_SUCCESS;
}
/*----------------------------------------------------------------------
| NPT_System::GetCurrentTimeStamp
+---------------------------------------------------------------------*/
NPT_Result
NPT_System::GetCurrentTimeStamp(NPT_TimeStamp& now)
{
struct timeval now_tv;
// get current time from system
if (gettimeofday(&now_tv, NULL)) {
now.SetNanos(0);
return NPT_FAILURE;
}
// convert format
now.SetNanos((NPT_UInt64)now_tv.tv_sec * 1000000000 +
(NPT_UInt64)now_tv.tv_usec * 1000);
return NPT_SUCCESS;
}
/*----------------------------------------------------------------------
| NPT_DateTime::ChangeTimeZone
+---------------------------------------------------------------------*/
NPT_Result
NPT_DateTime::ChangeTimeZone(NPT_Int32 timezone)
{
if (timezone < -12*60 || timezone > 12*60) {
return NPT_ERROR_OUT_OF_RANGE;
}
NPT_TimeStamp ts;
NPT_Result result = ToTimeStamp(ts);
if (NPT_FAILED(result)) return result;
ts.SetNanos(ts.ToNanos()+(NPT_Int64)timezone*(NPT_Int64)60*(NPT_Int64)1000000000);
result = FromTimeStamp(ts);
m_TimeZone = timezone;
return result;
}
/*----------------------------------------------------------------------
| NPT_System::GetCurrentTimeStamp
+---------------------------------------------------------------------*/
NPT_Result
NPT_System::GetCurrentTimeStamp(NPT_TimeStamp& now)
{
struct _timeb time_stamp;
#if defined(_MSC_VER) && (_MSC_VER >= 1400)
_ftime_s(&time_stamp);
#else
_ftime(&time_stamp);
#endif
now.SetNanos(((NPT_UInt64)time_stamp.time) * 1000000000UL +
((NPT_UInt64)time_stamp.millitm) * 1000000);
return NPT_SUCCESS;
}
