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72 lines
1.9 KiB
C++
72 lines
1.9 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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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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#ifndef js_Date_h
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#define js_Date_h
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#include "mozilla/FloatingPoint.h"
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#include "mozilla/MathAlgorithms.h"
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#include "jstypes.h"
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#include "js/Conversions.h"
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#include "js/Value.h"
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namespace JS {
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class ClippedTime
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{
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double t;
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/* ES5 15.9.1.14. */
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double timeClip(double time) {
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/* Steps 1-2. */
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const double MaxTimeMagnitude = 8.64e15;
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if (!mozilla::IsFinite(time) || mozilla::Abs(time) > MaxTimeMagnitude)
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return JS::GenericNaN();
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/* Step 3. */
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return JS::ToInteger(time) + (+0.0);
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}
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public:
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ClippedTime() : t(JS::GenericNaN()) {}
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explicit ClippedTime(double time) : t(timeClip(time)) {}
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static ClippedTime NaN() { return ClippedTime(); }
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double value() const { return t; }
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};
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inline ClippedTime
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TimeClip(double d)
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{
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return ClippedTime(d);
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}
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// Year is a year, month is 0-11, day is 1-based. The return value is
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// a number of milliseconds since the epoch. Can return NaN.
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JS_PUBLIC_API(double)
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MakeDate(double year, unsigned month, unsigned day);
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// Takes an integer number of milliseconds since the epoch and returns the
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// year. Can return NaN, and will do so if NaN is passed in.
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JS_PUBLIC_API(double)
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YearFromTime(double time);
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// Takes an integer number of milliseconds since the epoch and returns the
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// month (0-11). Can return NaN, and will do so if NaN is passed in.
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JS_PUBLIC_API(double)
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MonthFromTime(double time);
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// Takes an integer number of milliseconds since the epoch and returns the
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// day (1-based). Can return NaN, and will do so if NaN is passed in.
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JS_PUBLIC_API(double)
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DayFromTime(double time);
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} // namespace JS
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#endif /* js_Date_h */
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