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/*
* Copyright (C) 1999-2000 Harri Porten (porten@kde.org)
* Copyright (C) 2006, 2007 Apple Inc. All rights reserved.
* Copyright (C) 2009 Google Inc. All rights reserved.
* Copyright (C) 2010 Research In Motion Limited. All rights reserved.
*
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla Communicator client code, released
* March 31, 1998.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. 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 MPL, the GPL or the LGPL.
*
*/
#ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_WTF_DATE_MATH_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_WTF_DATE_MATH_H_
#include <stdint.h>
#include <string.h>
#include <optional>
#include "base/time/time.h"
#include "third_party/blink/renderer/platform/wtf/text/wtf_string.h"
#include "third_party/blink/renderer/platform/wtf/wtf_export.h"
namespace WTF {
// Not really math related, but this is currently the only shared place to put
// these.
//
// TODO(tkent): Only blink::ParseDate() uses this function to parse HTTP
// header values. net::HTTPResponseHeaders::GetTimeValuedHeader() uses
// base::Time::FromUTCString() for the same purpose. We should consider
// switching to base::Time::FromUTCString() for consistency.
WTF_EXPORT std::optional<base::Time> ParseDateFromNullTerminatedCharacters(
const char* date_string);
const double kMinutesPerHour = 60.0;
const double kSecondsPerMinute = 60.0;
const double kMsPerSecond = 1000.0;
const double kMsPerMinute = 60.0 * 1000.0;
const double kMsPerHour = 60.0 * 60.0 * 1000.0;
const double kMsPerDay = 24.0 * 60.0 * 60.0 * 1000.0;
WTF_EXPORT bool IsLeapYear(int year);
// Returns the number of days from 1970-01-01 to the specified date.
WTF_EXPORT double DateToDaysFrom1970(int year, int month, int day);
WTF_EXPORT int MsToYear(double ms);
WTF_EXPORT int DayInYear(int year, int month, int day);
WTF_EXPORT int DayInYear(double ms, int year);
WTF_EXPORT int MonthFromDayInYear(int day_in_year, bool leap_year);
WTF_EXPORT int DayInMonthFromDayInYear(int day_in_year, bool leap_year);
// Returns a TimeDelta between the UNIX epoch in the local timezone and the
// specified time.
//
// For example, if the local timezone is PDT and the specified time represents
// "2019-08-09 13:00 PDT", this function returns a TimeDelta since
// "1970-01-01 00:00 PDT".
WTF_EXPORT base::TimeDelta ConvertToLocalTime(base::Time time);
} // namespace WTF
using WTF::IsLeapYear;
using WTF::DateToDaysFrom1970;
using WTF::DayInMonthFromDayInYear;
using WTF::DayInYear;
using WTF::kMinutesPerHour;
using WTF::MonthFromDayInYear;
using WTF::kMsPerDay;
using WTF::kMsPerHour;
using WTF::kMsPerMinute;
using WTF::kMsPerSecond;
using WTF::MsToYear;
using WTF::kSecondsPerMinute;
using WTF::ParseDateFromNullTerminatedCharacters;
using WTF::ConvertToLocalTime;
#endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_WTF_DATE_MATH_H_
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