Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

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