1 files changed, 54 insertions, 4 deletions

diff --git a/src/core/hle/service/time/time.cpp b/src/core/hle/service/time/time.cpp
index 2eb37fb42..654012189 100644
--- a/src/core/hle/service/time/time.cpp
+++ b/src/core/hle/service/time/time.cpp
@@ -3,6 +3,7 @@
 // Refer to the license.txt file included.
 
 #include <chrono>
+#include <ctime>
 #include "common/logging/log.h"
 #include "core/core_timing.h"
 #include "core/hle/ipc_helpers.h"
@@ -77,7 +78,7 @@ public:
             {3, nullptr, "LoadLocationNameList"},
             {4, &ITimeZoneService::LoadTimeZoneRule, "LoadTimeZoneRule"},
             {5, nullptr, "GetTimeZoneRuleVersion"},
-            {100, nullptr, "ToCalendarTime"},
+            {100, &ITimeZoneService::ToCalendarTime, "ToCalendarTime"},
             {101, &ITimeZoneService::ToCalendarTimeWithMyRule, "ToCalendarTimeWithMyRule"},
             {200, nullptr, "ToPosixTime"},
             {201, nullptr, "ToPosixTimeWithMyRule"},
@@ -86,9 +87,11 @@ public:
     }
 
 private:
+    LocationName location_name{"UTC"};
+    TimeZoneRule my_time_zone_rule{};
+
     void GetDeviceLocationName(Kernel::HLERequestContext& ctx) {
-        NGLOG_WARNING(Service_Time, "(STUBBED) called");
-        LocationName location_name{};
+        NGLOG_DEBUG(Service_Time, "called");
         IPC::ResponseBuilder rb{ctx, (sizeof(LocationName) / 4) + 2};
         rb.Push(RESULT_SUCCESS);
         rb.PushRaw(location_name);
@@ -103,23 +106,70 @@ private:
 
     void LoadTimeZoneRule(Kernel::HLERequestContext& ctx) {
         NGLOG_WARNING(Service_Time, "(STUBBED) called");
+
+        ctx.WriteBuffer(&my_time_zone_rule, sizeof(TimeZoneRule));
+
         IPC::ResponseBuilder rb{ctx, 2};
         rb.Push(RESULT_SUCCESS);
     }
 
+    void ToCalendarTime(Kernel::HLERequestContext& ctx) {
+        IPC::RequestParser rp{ctx};
+        const u64 posix_time = rp.Pop<u64>();
+
+        NGLOG_WARNING(Service_Time, "(STUBBED) called, posix_time=0x{:016X}", posix_time);
+
+        TimeZoneRule time_zone_rule{};
+        auto buffer = ctx.ReadBuffer();
+        std::memcpy(&time_zone_rule, buffer.data(), buffer.size());
+
+        CalendarTime calendar_time{2018, 1, 1, 0, 0, 0};
+        CalendarAdditionalInfo additional_info{};
+
+        PosixToCalendar(posix_time, calendar_time, additional_info, time_zone_rule);
+
+        IPC::ResponseBuilder rb{ctx, 10};
+        rb.Push(RESULT_SUCCESS);
+        rb.PushRaw(calendar_time);
+        rb.PushRaw(additional_info);
+    }
+
     void ToCalendarTimeWithMyRule(Kernel::HLERequestContext& ctx) {
         IPC::RequestParser rp{ctx};
-        u64 posix_time = rp.Pop<u64>();
+        const u64 posix_time = rp.Pop<u64>();
 
         NGLOG_WARNING(Service_Time, "(STUBBED) called, posix_time=0x{:016X}", posix_time);
 
         CalendarTime calendar_time{2018, 1, 1, 0, 0, 0};
         CalendarAdditionalInfo additional_info{};
+
+        PosixToCalendar(posix_time, calendar_time, additional_info, my_time_zone_rule);
+
         IPC::ResponseBuilder rb{ctx, 10};
         rb.Push(RESULT_SUCCESS);
         rb.PushRaw(calendar_time);
         rb.PushRaw(additional_info);
     }
+
+    void PosixToCalendar(u64 posix_time, CalendarTime& calendar_time,
+                         CalendarAdditionalInfo& additional_info, const TimeZoneRule& /*rule*/) {
+        std::time_t t(posix_time);
+        std::tm* tm = std::localtime(&t);
+        if (!tm) {
+            return;
+        }
+        calendar_time.year = tm->tm_year + 1900;
+        calendar_time.month = tm->tm_mon + 1;
+        calendar_time.day = tm->tm_mday;
+        calendar_time.hour = tm->tm_hour;
+        calendar_time.minute = tm->tm_min;
+        calendar_time.second = tm->tm_sec;
+
+        additional_info.day_of_week = tm->tm_wday;
+        additional_info.day_of_year = tm->tm_yday;
+        std::memcpy(additional_info.name.data(), "UTC", sizeof("UTC"));
+        additional_info.utc_offset = 0;
+    }
 };
 
 void Module::Interface::GetStandardUserSystemClock(Kernel::HLERequestContext& ctx) {