46e672db80
... when converting from double, i.e. to 300 nanoseconds. Empirically determined.. Change-Id: I92c43b5f244923363af5d44bece9c155126ca343 Reviewed-on: https://gerrit.libreoffice.org/c/core/+/155324 Reviewed-by: Eike Rathke <erack@redhat.com> Tested-by: Jenkins
98 lines
3.7 KiB
C++
98 lines
3.7 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*/
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#pragma once
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#include <tools/time.hxx>
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class DateTime;
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namespace tools
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{
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/** Duration in days and time. Can be negative in which case days is 0 and time
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is negative or both days and time are negative.
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*/
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class SAL_WARN_UNUSED TOOLS_DLLPUBLIC Duration
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{
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public:
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Duration() {}
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/** Assumes that DateTime are normalized and there are no Time out-of-range
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field values. */
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Duration(const ::DateTime& rStart, const ::DateTime& rEnd);
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/** Time can be a limited duration as well. We don't cater for out-of-range
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minutes and seconds values here though. */
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Duration(const Time& rStart, const Time& rEnd);
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/** Difference in days, like DateTime()-DateTime().
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@param nAccuracyEpsilonNanoseconds
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Round for example by 1 nanosecond if it's just 1 off to a
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second, i.e. 0999999999 or 0000000001. This can be loosened if
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necessary. For example, if fTimeInDays is a date+time in
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"today's" range with a significant seconds resolution, an
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accuracy epsilon (=unsharpness) of ~300 is required. Hence default.
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Must be 0 <= nAccuracyEpsilonNanoseconds <= Time::nanoSecPerSec - 1.
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*/
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explicit Duration(double fTimeInDays, sal_uInt64 nAccuracyEpsilonNanoseconds = 300);
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/** Time can be a limited duration as well and can have out-of-range
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values, it will be normalized. Sign of both days and Time must be equal
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unless one is 0. */
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Duration(sal_Int32 nDays, const Time& rTime);
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/** Individual time values can be out-of-range, all will be normalized.
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Additionally, the resulting time overall hour value is not restricted
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to sal_uInt16 like it is with Time, as values >=24 flow over into days.
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For a negative duration only a negative nDays can be given, thus a
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negative duration of less than one day is not possible. */
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Duration(sal_Int32 nDays, sal_uInt32 nHours, sal_uInt32 nMinutes, sal_uInt32 nSeconds,
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sal_uInt64 nNanoseconds);
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bool IsNegative() const { return mnDays < 0 || maTime.GetTime() < 0; }
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sal_Int32 GetDays() const { return mnDays; }
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const Time& GetTime() const { return maTime; }
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double GetInDays() const { return static_cast<double>(GetDays()) + GetTime().GetTimeInDays(); }
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/** Whether a duration is set. */
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operator bool() const { return maTime.GetTime() != 0 || mnDays != 0; }
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/** Unary minus. */
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Duration operator-() const;
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/** Add a duration to this instance. */
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Duration& Add(const Duration& rDuration, bool& rbOverflow);
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/** Get multiple of duration. */
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Duration Mult(sal_Int32 nMult, bool& rbOverflow) const;
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private:
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/** Internal days and Time values. */
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Duration(sal_Int32 nDays, sal_Int64 nTime);
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/** Prerequisite: mnDays is already set. */
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void Normalize(sal_uInt64 nHours, sal_uInt64 nMinutes, sal_uInt64 nSeconds,
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sal_uInt64 nNanoseconds, bool bNegative);
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/** Prerequisite: mnDays is already correctly set and absolute value of
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nanoseconds less than one day. */
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void ApplyTime(sal_Int64 nNS);
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/** Prerequisite: mnDays is already correctly set and Time hour values
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are adjusted. */
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void SetTimeDiff(const Time& rStart, const Time& rEnd);
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private:
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Time maTime = Time(0);
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sal_Int32 mnDays = 0;
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};
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}
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/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */
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