mtime.cpp
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- /* ***** BEGIN LICENSE BLOCK *****
- * Source last modified: $Id: mtime.cpp,v 1.2.36.3 2004/07/09 01:43:21 hubbe Exp $
- *
- * Portions Copyright (c) 1995-2004 RealNetworks, Inc. All Rights Reserved.
- *
- * The contents of this file, and the files included with this file,
- * are subject to the current version of the RealNetworks Public
- * Source License (the "RPSL") available at
- * http://www.helixcommunity.org/content/rpsl unless you have licensed
- * the file under the current version of the RealNetworks Community
- * Source License (the "RCSL") available at
- * http://www.helixcommunity.org/content/rcsl, in which case the RCSL
- * will apply. You may also obtain the license terms directly from
- * RealNetworks. You may not use this file except in compliance with
- * the RPSL or, if you have a valid RCSL with RealNetworks applicable
- * to this file, the RCSL. Please see the applicable RPSL or RCSL for
- * the rights, obligations and limitations governing use of the
- * contents of the file.
- *
- * Alternatively, the contents of this file may be used under the
- * terms of the GNU General Public License Version 2 or later (the
- * "GPL") in which case the provisions of the GPL are applicable
- * instead of those above. If you wish to allow use of your version of
- * this file only under the terms of the GPL, and not to allow others
- * to use your version of this file under the terms of either the RPSL
- * or RCSL, indicate your decision by deleting the provisions above
- * and replace them with the notice and other provisions required by
- * the GPL. If you do not delete the provisions above, a recipient may
- * use your version of this file under the terms of any one of the
- * RPSL, the RCSL or the GPL.
- *
- * This file is part of the Helix DNA Technology. RealNetworks is the
- * developer of the Original Code and owns the copyrights in the
- * portions it created.
- *
- * This file, and the files included with this file, is distributed
- * and made available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY
- * KIND, EITHER EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS
- * ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES
- * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET
- * ENJOYMENT OR NON-INFRINGEMENT.
- *
- * Technology Compatibility Kit Test Suite(s) Location:
- * http://www.helixcommunity.org/content/tck
- *
- * Contributor(s):
- *
- * ***** END LICENSE BLOCK ***** */
- #include "hxtypes.h"
- #include "hxtime.h"
- #include "hxassert.h"
- #include <limits.h>
- #ifndef _MAC_MACHO
- #include <Timer.h>
- #endif
- #include <time.h>
- #define kMaxMicroSecondComponent ULONG_MAX
- #define kLoMicroSecondsPerSecond 1000000
- #define kSecondsPerHiMicroSecond ( kMaxMicroSecondComponent / kLoMicroSecondsPerSecond )
- #define kLoMicroSecondsRoundOff ( kMaxMicroSecondComponent % kLoMicroSecondsPerSecond )
- static BOOL gHasCalculatedReferenceTime = FALSE;
- static time_t gReferenceTime;
- static UnsignedWide gReferenceMicroSeconds;
- int gettimeofday(HXTime* pTime, void* unused)
- {
- // (?) Warning: Overflow not currently checked.
- if ( !gHasCalculatedReferenceTime )
- {
- // convert to Windows time ( secs since 1/1/70 )
- struct tm the1970Time = { 0, 0, 0, 0, 0, 0, 0, 0, 0 };
- the1970Time.tm_year = 70;
- the1970Time.tm_mday = 1;
- the1970Time.tm_mon = 0;
- time_t theWinTime = mktime( &the1970Time );
- time_t theMacTime;
-
- UnsignedWide theRefMicroSecs1, theRefMicroSecs2;
- Microseconds( &theRefMicroSecs1 );
- time( &theMacTime ); // mac time in secs since 1/1/00
- Microseconds( &theRefMicroSecs2 );
- /* Calculate the average of theRefMicroSecs1 and theRefMicroSecs2
- to correspond with the time calculated with time(). */
- gReferenceTime = theMacTime - theWinTime;
- gReferenceMicroSeconds.lo = ( theRefMicroSecs1.lo >> 1 ) + ( theRefMicroSecs2.lo >> 1 ) +
- ( ( ( theRefMicroSecs1.lo & 1 ) + ( theRefMicroSecs2.lo & 1 ) ) >> 1 );
- gReferenceMicroSeconds.hi = ( theRefMicroSecs1.hi >> 1 ) + ( theRefMicroSecs2.hi >> 1 ) +
- ( ( ( theRefMicroSecs1.hi & 1 ) + ( theRefMicroSecs2.hi & 1 ) ) >> 1 );
-
- pTime->tv_sec = gReferenceTime;
- pTime->tv_usec = 0;
-
- gHasCalculatedReferenceTime = TRUE;
- }
- else
- {
- UnsignedWide theCurrentMicroSecs, theDifferenceMicroSecs;
- Microseconds( &theCurrentMicroSecs );
- HX_ASSERT( ( theCurrentMicroSecs.hi > gReferenceMicroSeconds.hi ) ||
- ( ( theCurrentMicroSecs.hi == gReferenceMicroSeconds.hi ) &&
- ( theCurrentMicroSecs.lo >= gReferenceMicroSeconds.lo ) ) );
-
- // Calculate theDifferenceMicroSecs = theCurrentMicroSecs - gReferenceMicroSeconds;
- BOOL hasLoComponentRolledOver;
- if ( theCurrentMicroSecs.lo >= gReferenceMicroSeconds.lo )
- {
- theDifferenceMicroSecs.lo = theCurrentMicroSecs.lo - gReferenceMicroSeconds.lo;
- hasLoComponentRolledOver = FALSE;
- }
- else
- {
- theDifferenceMicroSecs.lo = kMaxMicroSecondComponent - gReferenceMicroSeconds.lo + theCurrentMicroSecs.lo;
- hasLoComponentRolledOver = TRUE;
- }
- theDifferenceMicroSecs.hi = theCurrentMicroSecs.hi - gReferenceMicroSeconds.hi;
- if ( hasLoComponentRolledOver )
- {
- theDifferenceMicroSecs.hi--;
- }
-
- // Return Seconds and Microseconds portions of theDifferenceMicroSecs added to the gReferenceTime.
- pTime->tv_sec = gReferenceTime + ( theDifferenceMicroSecs.lo / kLoMicroSecondsPerSecond );
- pTime->tv_usec = theDifferenceMicroSecs.lo % kLoMicroSecondsPerSecond;
- if ( theDifferenceMicroSecs.hi > 0 )
- {
- ULONG32 theMicroSecondRoundOff = theDifferenceMicroSecs.hi * kLoMicroSecondsRoundOff;
- pTime->tv_sec += theDifferenceMicroSecs.hi * kSecondsPerHiMicroSecond;
- pTime->tv_sec += theMicroSecondRoundOff / kLoMicroSecondsPerSecond;
- pTime->tv_usec += theMicroSecondRoundOff % kLoMicroSecondsPerSecond;
- pTime->tv_sec += pTime->tv_usec / kLoMicroSecondsPerSecond;
- pTime->tv_usec %= kLoMicroSecondsPerSecond;
- }
- }
- return 0;
-
- }
- time_t WinToMacTime(time_t timeT)
- {
- // convert to Mac time (secs since 1/1/04)
- struct tm t1970 = {0,0,0,0,0,0,0,0,0};
- t1970.tm_year=70;
- t1970.tm_mday=1;
- t1970.tm_mon=0;
- time_t macT = mktime(&t1970);
- return (macT+timeT);
- }
- time_t MacToWinTime(time_t timeT)
- {
- // convert to Win time (secs since 1/1/70)
- struct tm t1970 = {0,0,0,0,0,0,0,0,0};
- t1970.tm_year=70;
- t1970.tm_mday=1;
- t1970.tm_mon=0;
- time_t winT = mktime(&t1970);
- return (timeT-winT);
- }