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90 lines
3.0 KiB
C++
90 lines
3.0 KiB
C++
//
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// Timezone.h
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//
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// $Id: //poco/Main/Foundation/include/Poco/Timezone.h#2 $
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//
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// Library: Foundation
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// Package: DateTime
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// Module: Timezone
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//
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// Definition of the Timezone class.
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//
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// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
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// and Contributors.
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//
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// Permission is hereby granted, free of charge, to any person or organization
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// obtaining a copy of the software and accompanying documentation covered by
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// this license (the "Software") to use, reproduce, display, distribute,
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// execute, and transmit the Software, and to prepare derivative works of the
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// Software, and to permit third-parties to whom the Software is furnished to
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// do so, all subject to the following:
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//
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// The copyright notices in the Software and this entire statement, including
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// the above license grant, this restriction and the following disclaimer,
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// must be included in all copies of the Software, in whole or in part, and
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// all derivative works of the Software, unless such copies or derivative
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// works are solely in the form of machine-executable object code generated by
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// a source language processor.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
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// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
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// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
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// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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//
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#ifndef Foundation_Timezone_INCLUDED
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#define Foundation_Timezone_INCLUDED
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#include "Poco/Foundation.h"
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#include "Poco/Timestamp.h"
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namespace Poco {
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class Foundation_API Timezone
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/// This class provides information about the current timezone.
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{
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public:
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static int utcOffset();
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/// Returns the offset of local time to UTC, in seconds.
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/// local time = UTC + utcOffset().
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static int dst();
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/// Returns the daylight saving time offset in seconds if
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/// daylight saving time is in use.
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/// local time = UTC + utcOffset() + dst().
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static bool isDst(const Timestamp& timestamp);
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/// Returns true if daylight saving time is in effect
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/// for the given time. Depending on the operating system
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/// platform this might only work reliably for certain
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/// date ranges, as the C library's localtime() function
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/// is used.
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static int tzd();
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/// Returns the time zone differential for the current timezone.
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/// The timezone differential is computed as utcOffset() + dst()
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/// and is expressed in seconds.
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static std::string name();
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/// Returns the timezone name currently in effect.
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static std::string standardName();
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/// Returns the timezone name if not daylight saving time is in effect.
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static std::string dstName();
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/// Returns the timezone name if daylight saving time is in effect.
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};
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} // namespace Poco
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#endif // Foundation_Timezone_INCLUDED
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