Cherry pick PR #1817: [UWP] Match time zone names with other platform…

…s (#1849)

Refer to the original PR: youtube/cobalt#1817

Update time_zone_get_name to match how other platforms behave.

b/304335954

Change-Id: I3862bcb6ae4118dad76b8a6687194e993927c539

Co-authored-by: Tyler Holcombe <[email protected]>

starboard/shared/uwp/time_zone_get_name.cc

@@ -0,0 +1,45 @@
+// Copyright 2023 The Cobalt Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "starboard/time_zone.h"
+
+#include <Windows.h>
+#include <string>
+
+#include "starboard/once.h"
+#include "starboard/shared/win32/wchar_utils.h"
+
+namespace {
+class TimeZoneString {
+ public:
+  static TimeZoneString* Get();
+  const char* value() const { return value_.c_str(); }
+
+ private:
+  TimeZoneString() {
+    Windows::Globalization::Calendar ^ calendar =
+        ref new Windows::Globalization::Calendar();
+    Platform::String ^ time_zone = calendar->GetTimeZone();
+    value_ = starboard::shared::win32::platformStringToString(time_zone);
+  }
+  std::string value_;
+};
+
+SB_ONCE_INITIALIZE_FUNCTION(TimeZoneString, TimeZoneString::Get);
+}  // namespace.
+
+const char* SbTimeZoneGetName() {
+  const char* output = TimeZoneString::Get()->value();
+  return output;
+}

starboard/shared/win32/time_zone_get_name.cc

@@ -28,6 +28,10 @@ class TimeZoneString {
   const char* value() const { return value_.c_str(); }
 
  private:
+  // Returns a string representing a time zone name, e.g. "EST" for Eastern
+  // Standard Time or "PDT" for Pacific Daylight Time. There isn't a native way
+  // to convert these to IANA name format on Windows without UWP, so we're
+  // making use of GetDynamicTimeZoneInformation for now.
   TimeZoneString() {
     DYNAMIC_TIME_ZONE_INFORMATION time_zone_info;
     DWORD zone_id = GetDynamicTimeZoneInformation(&time_zone_info);

starboard/win/shared/BUILD.gn

@@ -304,7 +304,6 @@ static_library("starboard_platform") {
     "//starboard/shared/win32/time_get_now.cc",
     "//starboard/shared/win32/time_utils.h",
     "//starboard/shared/win32/time_zone_get_current.cc",
-    "//starboard/shared/win32/time_zone_get_name.cc",
     "//starboard/shared/win32/video_decoder.cc",
     "//starboard/shared/win32/video_decoder.h",
     "//starboard/shared/win32/wasapi_include.h",

starboard/win/win32/BUILD.gn

@@ -59,6 +59,7 @@ static_library("starboard_platform") {
     "//starboard/shared/win32/system_get_used_cpu_memory.cc",
     "//starboard/shared/win32/system_raise_platform_error.cc",
     "//starboard/shared/win32/system_symbolize.cc",
+    "//starboard/shared/win32/time_zone_get_name.cc",
     "//starboard/shared/win32/window_create.cc",
     "//starboard/shared/win32/window_destroy.cc",
     "//starboard/shared/win32/window_get_platform_handle.cc",

starboard/xb1/BUILD.gn

@@ -134,6 +134,7 @@ static_library("starboard_platform") {
     "//starboard/shared/uwp/system_platform_error_internal.cc",
     "//starboard/shared/uwp/system_platform_error_internal.h",
     "//starboard/shared/uwp/system_raise_platform_error.cc",
+    "//starboard/shared/uwp/time_zone_get_name.cc",
     "//starboard/shared/uwp/wasapi_audio.cc",
     "//starboard/shared/uwp/wasapi_audio.h",
     "//starboard/shared/uwp/wasapi_audio_sink.cc",