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/* $Id: Timestamp.h $ */
/** @file
* DHCP server - timestamps
*/
/*
* Copyright (C) 2017-2023 Oracle and/or its affiliates.
*
* This file is part of VirtualBox base platform packages, as
* available from https://www.virtualbox.org.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation, in version 3 of the
* License.
*
* This program 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
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses>.
*
* SPDX-License-Identifier: GPL-3.0-only
*/
#ifndef VBOX_INCLUDED_SRC_Dhcpd_Timestamp_h
#define VBOX_INCLUDED_SRC_Dhcpd_Timestamp_h
#ifndef RT_WITHOUT_PRAGMA_ONCE
# pragma once
#endif
#include <iprt/time.h>
/**
* Wrapper around RTTIMESPEC.
*
* @note Originally wanting to use RTTimeNanoTS rather than RTTimeNow. The term
* "absolute" was used for when the RTTimeNanoTS() value was converted to
* something approximating unix epoch relative time with help of
* RTTimeNow(). Code was later changed to just wrap RTTIMESPEC and drop
* all usage of RTTimeNanoTS, ASSUMING that system time is stable.
*/
class Timestamp
{
RTTIMESPEC m_TimeSpec;
public:
Timestamp() RT_NOEXCEPT
{
RTTimeSpecSetNano(&m_TimeSpec, 0);
}
Timestamp(PCRTTIMESPEC a_pTimeSpec) RT_NOEXCEPT
{
m_TimeSpec = *a_pTimeSpec;
}
/** Get a timestamp initialized to current time. */
static Timestamp now() RT_NOEXCEPT
{
RTTIMESPEC Tmp;
return Timestamp(RTTimeNow(&Tmp));
}
/** Get a timestamp with the given value in seconds since unix epoch. */
static Timestamp absSeconds(int64_t secTimestamp) RT_NOEXCEPT
{
RTTIMESPEC Tmp;
return Timestamp(RTTimeSpecSetSeconds(&Tmp, secTimestamp));
}
Timestamp &addSeconds(int64_t cSecs) RT_NOEXCEPT
{
RTTimeSpecAddSeconds(&m_TimeSpec, cSecs);
return *this;
}
Timestamp &subSeconds(int64_t cSecs) RT_NOEXCEPT
{
RTTimeSpecSubSeconds(&m_TimeSpec, cSecs);
return *this;
}
RTTIMESPEC *getAbsTimeSpec(RTTIMESPEC *pTime) const RT_NOEXCEPT
{
*pTime = m_TimeSpec;
return pTime;
}
int64_t getAbsSeconds() const RT_NOEXCEPT
{
return RTTimeSpecGetSeconds(&m_TimeSpec);
}
/** Only for log formatting. */
size_t strFormatHelper(PFNRTSTROUTPUT pfnOutput, void *pvArgOutput) const RT_NOEXCEPT;
int compare(const Timestamp &a_rRight) const RT_NOEXCEPT
{
return RTTimeSpecCompare(&m_TimeSpec, &a_rRight.m_TimeSpec);
}
friend bool operator<( const Timestamp &, const Timestamp &) RT_NOEXCEPT;
friend bool operator>( const Timestamp &, const Timestamp &) RT_NOEXCEPT;
friend bool operator==(const Timestamp &, const Timestamp &) RT_NOEXCEPT;
friend bool operator!=(const Timestamp &, const Timestamp &) RT_NOEXCEPT;
friend bool operator<=(const Timestamp &, const Timestamp &) RT_NOEXCEPT;
friend bool operator>=(const Timestamp &, const Timestamp &) RT_NOEXCEPT;
};
inline bool operator<( const Timestamp &l, const Timestamp &r) RT_NOEXCEPT { return l.compare(r) < 0; }
inline bool operator>( const Timestamp &l, const Timestamp &r) RT_NOEXCEPT { return l.compare(r) > 0; }
inline bool operator==(const Timestamp &l, const Timestamp &r) RT_NOEXCEPT { return l.compare(r) == 0; }
inline bool operator!=(const Timestamp &l, const Timestamp &r) RT_NOEXCEPT { return l.compare(r) != 0; }
inline bool operator<=(const Timestamp &l, const Timestamp &r) RT_NOEXCEPT { return l.compare(r) <= 0; }
inline bool operator>=(const Timestamp &l, const Timestamp &r) RT_NOEXCEPT { return l.compare(r) >= 0; }
#endif /* !VBOX_INCLUDED_SRC_Dhcpd_Timestamp_h */
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