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//
// Timezone_WIN32.cpp
//
// Library: Foundation
// Package: DateTime
// Module: Timezone
//
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier: BSL-1.0
//
#include "Poco/Timezone.h"
#include "Poco/UnicodeConverter.h"
#include "Poco/Exception.h"
#include "Poco/UnWindows.h"
#include <ctime>
namespace Poco {
int Timezone::utcOffset()
{
TIME_ZONE_INFORMATION tzInfo;
/*DWORD dstFlag = */GetTimeZoneInformation(&tzInfo);
return -tzInfo.Bias*60;
}
int Timezone::dst()
{
TIME_ZONE_INFORMATION tzInfo;
DWORD dstFlag = GetTimeZoneInformation(&tzInfo);
return dstFlag == TIME_ZONE_ID_DAYLIGHT ? -tzInfo.DaylightBias*60 : 0;
}
bool Timezone::isDst(const Timestamp& timestamp)
{
std::time_t time = timestamp.epochTime();
struct std::tm* tms = std::localtime(&time);
if (!tms) throw Poco::SystemException("cannot get local time DST flag");
return tms->tm_isdst > 0;
}
std::string Timezone::name()
{
std::string result;
TIME_ZONE_INFORMATION tzInfo;
DWORD dstFlag = GetTimeZoneInformation(&tzInfo);
WCHAR* ptr = dstFlag == TIME_ZONE_ID_DAYLIGHT ? tzInfo.DaylightName : tzInfo.StandardName;
#if defined(POCO_WIN32_UTF8)
UnicodeConverter::toUTF8(ptr, result);
#else
char buffer[256];
DWORD rc = WideCharToMultiByte(CP_ACP, 0, ptr, -1, buffer, sizeof(buffer), NULL, NULL);
if (rc) result = buffer;
#endif
return result;
}
std::string Timezone::standardName()
{
std::string result;
TIME_ZONE_INFORMATION tzInfo;
/*DWORD dstFlag =*/ GetTimeZoneInformation(&tzInfo);
WCHAR* ptr = tzInfo.StandardName;
#if defined(POCO_WIN32_UTF8)
UnicodeConverter::toUTF8(ptr, result);
#else
char buffer[256];
DWORD rc = WideCharToMultiByte(CP_ACP, 0, ptr, -1, buffer, sizeof(buffer), NULL, NULL);
if (rc) result = buffer;
#endif
return result;
}
std::string Timezone::dstName()
{
std::string result;
TIME_ZONE_INFORMATION tzInfo;
/*DWORD dstFlag =*/ GetTimeZoneInformation(&tzInfo);
WCHAR* ptr = tzInfo.DaylightName;
#if defined(POCO_WIN32_UTF8)
UnicodeConverter::toUTF8(ptr, result);
#else
char buffer[256];
DWORD rc = WideCharToMultiByte(CP_ACP, 0, ptr, -1, buffer, sizeof(buffer), NULL, NULL);
if (rc) result = buffer;
#endif
return result;
}
} // namespace Poco
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