ntptime.cpp
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上传日期:2007-06-06
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- /* ***** BEGIN LICENSE BLOCK *****
- * Version: RCSL 1.0/RPSL 1.0
- *
- * Portions Copyright (c) 1995-2002 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
- * Version 1.0 (the "RPSL") available at
- * http://www.helixcommunity.org/content/rpsl unless you have licensed
- * the file under the RealNetworks Community Source License Version 1.0
- * (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.
- *
- * 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 "hlxclib/stdio.h"
- #include "hlxclib/stdlib.h"
- #include "hxtypes.h"
- #include "hxstring.h"
- #include "hxtime.h"
- #include "timeval.h"
- #include "ntptime.h"
- #ifdef _DEBUG
- #undef HX_THIS_FILE
- static const char HX_THIS_FILE[] = __FILE__;
- #endif
- NTPTime::NTPTime()
- {
- // default to now
- Timeval now;
- gettimeofday(&now, 0);
- fromTimeval(now);
- }
- NTPTime::NTPTime(UINT32 ulSec, UINT32 ulFrac):
- m_ulSecond(ulSec),
- m_ulFraction(ulFrac)
- {
- }
- NTPTime::NTPTime(UINT32 mSec)
- {
- fromMSec(mSec);
- }
- NTPTime::NTPTime(Timeval tv)
- {
- fromTimeval(tv);
- }
- NTPTime::NTPTime(const NTPTime& lhs)
- {
- m_ulSecond = lhs.m_ulSecond;
- m_ulFraction = lhs.m_ulFraction;
- }
- NTPTime&
- NTPTime::operator=(const NTPTime& lhs)
- {
- m_ulSecond = lhs.m_ulSecond;
- m_ulFraction = lhs.m_ulFraction;
- return *this;
- }
- INT32
- NTPTime::compare(const NTPTime& lhs) const
- {
- // I'm sure there's a better way to do this...
- if(m_ulSecond > lhs.m_ulSecond)
- {
- return 1;
- }
- else if(m_ulSecond == lhs.m_ulSecond)
- {
- return (INT32) ((m_ulFraction >> 1) - (lhs.m_ulFraction >> 1));
- }
- return -1;
- }
- UINT32
- NTPTime::toMSec()
- {
- // no checking for overflow
- double ms = (m_ulSecond * 1000.0);
- ms += ((double) m_ulFraction / (double) MAX_UINT32) * 1000.0;
- return (UINT32) ms;
- }
- void
- NTPTime::fromMSec(INT32 mSec)
- {
- Timeval tv;
- tv.tv_sec = mSec / 1000;
- tv.tv_usec = (mSec % 1000) * 1000;
- fromTimeval(tv);
- }
- NTPTime::operator UINT32()
- {
- return toMSec();
- }
- NTPTime&
- NTPTime::operator+=(const NTPTime& lhs)
- {
- m_ulSecond += lhs.m_ulSecond;
- if ((MAX_UINT32 - m_ulFraction + 1) <= lhs.m_ulFraction)
- {
- // No overflow checking
- m_ulSecond++;
- m_ulFraction = lhs.m_ulFraction - (MAX_UINT32 - m_ulFraction + 1);
- }
- else
- {
- m_ulFraction += lhs.m_ulFraction;
- }
-
- return *this;
- }
- NTPTime&
- NTPTime::operator-=(const NTPTime& lhs)
- {
- m_ulSecond -= lhs.m_ulSecond;
- if (m_ulFraction < lhs.m_ulFraction)
- {
- // No underflow checking
- m_ulSecond--;
- }
- m_ulFraction = m_ulFraction - lhs.m_ulFraction;
-
- return *this;
- }
- NTPTime
- NTPTime::operator+(const NTPTime& lhs)
- {
- NTPTime tmpTime(*this);
- tmpTime += lhs;
- return tmpTime;
- }
- NTPTime
- NTPTime::operator-(const NTPTime& lhs)
- {
- NTPTime tmpTime(*this);
- tmpTime -= lhs;
- return tmpTime;
- }