acsutilTimeStamp.h

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#ifndef acsutilTime_H
#define acsutilTime_H

/*******************************************************************
* ALMA - Atacama Large Millimiter Array
* (c) European Southern Observatory, 2004 
*
*This library is free software; you can redistribute it and/or
*modify it under the terms of the GNU Lesser General Public
*License as published by the Free Software Foundation; either
*version 2.1 of the License, or (at your option) any later version.
*
*This library is distributed in the hope that it will be useful,
*but WITHOUT ANY WARRANTY; without even the implied warranty of
*MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
*Lesser General Public License for more details.
*
*You should have received a copy of the GNU Lesser General Public
*License along with this library; if not, write to the Free Software
*Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA
*
* "@(#) $Id: acsutilTimeStamp.h,v 1.1 2005/12/12 19:12:29 dfugate Exp $"
*
* who       when        what
* --------  ----------  ----------------------------------------------
* msekoran  2001/03/12  modified
*/

#ifndef __cplusplus
#error This is a C++ include file and cannot be used from plain C
#endif

#include <acscommonC.h>
#include <SString.h>
#include <OS_NS_time.h>

#if defined (ACE_LACKS_LONGLONG_T)
  static const CORBA::ULongLong UTCtoUNIXTimeBaseOffset (0xD8539C80, 2);
  // (Lower 32 bits of the offset in hex, Upper 32 bits of the offset in hex)
#else
  static const CORBA::ULongLong UTCtoUNIXTimeBaseOffset = ACE_UINT64_LITERAL(0x2D8539C80);
#endif


ACS::Time getTimeStamp();

ACS::TimeInterval getTime();

ACE_CString getStringifiedTimeStamp();

inline ACE_Time_Value UTCtoACE_Time_Value(const ACS::Time &time)
{
    ACS::Time seconds = time / static_cast<ACE_UINT32>(10000000);
    ACS::Time microseconds = (time % static_cast<ACE_UINT32>(10000000)) / 10;
    return ACE_Time_Value (ACE_U64_TO_U32 (seconds),
                           ACE_U64_TO_U32 (microseconds));
}

inline ACE_CString getStringifiedUTC(ACS::TimeInterval time)
{
  ACE_TCHAR str[24];
  ACE_TCHAR ctp[20];

  // convert to UNIX time
  time -= UTCtoUNIXTimeBaseOffset * ACE_static_cast(ACE_UINT32, 10000000);

  ACE_Time_Value tv = UTCtoACE_Time_Value(time);

  time_t ut(tv.sec());
  struct tm *utc_p = ACE_OS::gmtime(&ut);
  ACE_OS::strftime(ctp, sizeof(ctp), "%Y-%m-%dT%H:%M:%S", utc_p);
  
  ACE_OS::sprintf (str, ACE_TEXT ("%s.%03ld"),
                   ctp, tv.usec () / 1000);
  
  return str;
}

#endif