timezone_unix.cpp

This software aims to create an applet and panel tools to manage a wireless interface card, such as

//
// Timezone_UNIX.cpp
//
// $Id: //poco/Main/Foundation/src/Timezone_UNIX.cpp#5 $
//
// Copyright (c) 2004, Guenter Obiltschnig/Applied Informatics.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
//
// 1. Redistributions of source code must retain the above copyright
//    notice, this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright
//    notice, this list of conditions and the following disclaimer in the
//    documentation and/or other materials provided with the distribution.
//
// 3. Redistributions in any form must be accompanied by information on
//    how to obtain complete source code for this software and any
//    accompanying software that uses this software.  The source code
//    must either be included in the distribution or be available for no
//    more than the cost of distribution plus a nominal fee, and must be
//    freely redistributable under reasonable conditions.  For an
//    executable file, complete source code means the source code for all
//    modules it contains.  It does not include source code for modules or
//    files that typically accompany the major components of the operating
//    system on which the executable file runs.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
// COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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// POSSIBILITY OF SUCH DAMAGE.
//


#include "Foundation/Timezone.h"
#include <time.h>


Foundation_BEGIN


class TZInfo
{
public:
	TZInfo()
	{
		tzset();
	}
	
	int timeZone()
	{
	#if defined(__APPLE__) // no timezone global var
		time_t now = time(NULL);
		struct tm t;
		gmtime_r(&now, &t);
		time_t utc = mktime(&t);
		return now - utc;
	#else
		return timezone;
	#endif
	}
	
	const char* name(bool dst)
	{
		return tzname[dst ? 1 : 0];
	}
};


static TZInfo tzInfo;


int Timezone::utcOffset()
{
	return tzInfo.timeZone();
}

	
int Timezone::dst()
{
	time_t now = time(NULL);
	struct tm t;
	localtime_r(&now, &t);
	return t.tm_isdst == 1 ? -3600 : 0;
}


bool Timezone::isDst(const Timestamp& timestamp)
{
	time_t time = timestamp.epochTime();
	struct tm* tms = localtime(&time);
	return tms->tm_isdst > 0;
}

	
std::string Timezone::name()
{
	return std::string(tzInfo.name(dst() != 0));
}

	
std::string Timezone::standardName()
{
	return std::string(tzInfo.name(false));
}

	
std::string Timezone::dstName()
{
	return std::string(tzInfo.name(true));
}


Foundation_END