diff options
Diffstat (limited to 'intl/icu/source/i18n/wintzimpl.cpp')
| -rw-r--r-- | intl/icu/source/i18n/wintzimpl.cpp | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/intl/icu/source/i18n/wintzimpl.cpp b/intl/icu/source/i18n/wintzimpl.cpp new file mode 100644 index 0000000000..8f2961f8f0 --- /dev/null +++ b/intl/icu/source/i18n/wintzimpl.cpp @@ -0,0 +1,161 @@ +// © 2016 and later: Unicode, Inc. and others. +// License & terms of use: http://www.unicode.org/copyright.html +/* +******************************************************************************** +* Copyright (C) 2009-2013, International Business Machines +* Corporation and others. All Rights Reserved. +******************************************************************************** +* +* File WINTZIMPL.CPP +* +******************************************************************************** +*/ + +#include "unicode/utypes.h" + +#if U_PLATFORM_USES_ONLY_WIN32_API && !UCONFIG_NO_FORMATTING + +#include "wintzimpl.h" + +#include "unicode/unistr.h" +#include "unicode/timezone.h" +#include "unicode/basictz.h" +#include "putilimp.h" +#include "uassert.h" +#include "cmemory.h" + +#ifndef WIN32_LEAN_AND_MEAN +# define WIN32_LEAN_AND_MEAN +#endif +# define VC_EXTRALEAN +# define NOUSER +# define NOSERVICE +# define NOIME +# define NOMCX + +#include <windows.h> + +U_NAMESPACE_USE + +static UBool getSystemTimeInformation(TimeZone *tz, SYSTEMTIME &daylightDate, SYSTEMTIME &standardDate, int32_t &bias, int32_t &daylightBias, int32_t &standardBias) { + UErrorCode status = U_ZERO_ERROR; + UBool result = true; + BasicTimeZone *btz = (BasicTimeZone*)tz; // we should check type + InitialTimeZoneRule *initial = nullptr; + AnnualTimeZoneRule *std = nullptr, *dst = nullptr; + + btz->getSimpleRulesNear(uprv_getUTCtime(), initial, std, dst, status); + if (U_SUCCESS(status)) { + if (std == nullptr || dst == nullptr) { + bias = -1 * (initial->getRawOffset()/60000); + standardBias = 0; + daylightBias = 0; + // Do not use DST. Set 0 to all stadardDate/daylightDate fields + standardDate.wYear = standardDate.wMonth = standardDate.wDayOfWeek = standardDate.wDay = + standardDate.wHour = standardDate.wMinute = standardDate.wSecond = standardDate.wMilliseconds = 0; + daylightDate.wYear = daylightDate.wMonth = daylightDate.wDayOfWeek = daylightDate.wDay = + daylightDate.wHour = daylightDate.wMinute = daylightDate.wSecond = daylightDate.wMilliseconds = 0; + } else { + U_ASSERT(std->getRule()->getDateRuleType() == DateTimeRule::DOW); + U_ASSERT(dst->getRule()->getDateRuleType() == DateTimeRule::DOW); + + bias = -1 * (std->getRawOffset()/60000); + standardBias = 0; + daylightBias = -1 * (dst->getDSTSavings()/60000); + // Always use DOW type rule + int32_t hour, min, sec, mil; + standardDate.wYear = 0; + standardDate.wMonth = static_cast<WORD>(std->getRule()->getRuleMonth()) + 1; + standardDate.wDay = static_cast<WORD>(std->getRule()->getRuleWeekInMonth()); + if (standardDate.wDay < 0) { + standardDate.wDay = 5; + } + standardDate.wDayOfWeek = static_cast<WORD>(std->getRule()->getRuleDayOfWeek()) - 1; + + mil = std->getRule()->getRuleMillisInDay(); + hour = mil/3600000; + mil %= 3600000; + min = mil/60000; + mil %= 60000; + sec = mil/1000; + mil %= 1000; + + standardDate.wHour = static_cast<WORD>(hour); + standardDate.wMinute = static_cast<WORD>(min); + standardDate.wSecond = static_cast<WORD>(sec); + standardDate.wMilliseconds = static_cast<WORD>(mil); + + daylightDate.wYear = 0; + daylightDate.wMonth = static_cast<WORD>(dst->getRule()->getRuleMonth()) + 1; + daylightDate.wDay = static_cast<WORD>(dst->getRule()->getRuleWeekInMonth()); + if (daylightDate.wDay < 0) { + daylightDate.wDay = 5; + } + daylightDate.wDayOfWeek = static_cast<WORD>(dst->getRule()->getRuleDayOfWeek()) - 1; + + mil = dst->getRule()->getRuleMillisInDay(); + hour = mil/3600000; + mil %= 3600000; + min = mil/60000; + mil %= 60000; + sec = mil/1000; + mil %= 1000; + + daylightDate.wHour = static_cast<WORD>(hour); + daylightDate.wMinute = static_cast<WORD>(min); + daylightDate.wSecond = static_cast<WORD>(sec); + daylightDate.wMilliseconds = static_cast<WORD>(mil); + } + } else { + result = false; + } + + delete initial; + delete std; + delete dst; + + return result; +} + +static UBool getWindowsTimeZoneInfo(TIME_ZONE_INFORMATION *zoneInfo, const char16_t *icuid, int32_t length) { + UBool result = false; + UnicodeString id = UnicodeString(icuid, length); + TimeZone *tz = TimeZone::createTimeZone(id); + + if (tz != nullptr) { + int32_t bias; + int32_t daylightBias; + int32_t standardBias; + SYSTEMTIME daylightDate; + SYSTEMTIME standardDate; + + if (getSystemTimeInformation(tz, daylightDate, standardDate, bias, daylightBias, standardBias)) { + uprv_memset(zoneInfo, 0, sizeof(TIME_ZONE_INFORMATION)); // We do not set standard/daylight names, so nullify first. + zoneInfo->Bias = bias; + zoneInfo->DaylightBias = daylightBias; + zoneInfo->StandardBias = standardBias; + zoneInfo->DaylightDate = daylightDate; + zoneInfo->StandardDate = standardDate; + + result = true; + } + } + + return result; +} + +/* + * Given the timezone icuid, fill in zoneInfo by calling auxiliary functions that creates a timezone and extract the + * information to put into zoneInfo. This includes bias and standard time date and daylight saving date. + */ +U_CAPI UBool U_EXPORT2 +uprv_getWindowsTimeZoneInfo(TIME_ZONE_INFORMATION *zoneInfo, const char16_t *icuid, int32_t length) +{ + if (getWindowsTimeZoneInfo(zoneInfo, icuid, length)) { + return true; + } else { + return false; + } +} + +#endif |