From fab2607c6bae25f50912b32e1cbbfb5a6191916c Mon Sep 17 00:00:00 2001
From: bunnei <bunneidev@gmail.com>
Date: Sun, 22 Dec 2019 18:10:59 -0500
Subject: service: time: Implement
 IsStandardNetworkSystemClockAccuracySufficient.

---
 src/core/hle/service/time/clock_types.h | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

(limited to 'src/core/hle/service/time/clock_types.h')

diff --git a/src/core/hle/service/time/clock_types.h b/src/core/hle/service/time/clock_types.h
index f2ef3ec53..3d5b0ff1e 100644
--- a/src/core/hle/service/time/clock_types.h
+++ b/src/core/hle/service/time/clock_types.h
@@ -4,6 +4,8 @@
 
 #pragma once
 
+#include <boost/safe_numerics/safe_integer.hpp>
+
 #include "common/common_funcs.h"
 #include "common/common_types.h"
 #include "common/uuid.h"
@@ -17,6 +19,24 @@ struct SteadyClockTimePoint {
     s64 time_point;
     Common::UUID clock_source_id;
 
+    ResultCode GetSpanBetween(SteadyClockTimePoint other, s64& span) const {
+        span = 0;
+
+        if (clock_source_id != other.clock_source_id) {
+            return ERROR_TIME_MISMATCH;
+        }
+
+        const boost::safe_numerics::safe<s64> this_time_point{time_point};
+        const boost::safe_numerics::safe<s64> other_time_point{other.time_point};
+        try {
+            span = other_time_point - this_time_point;
+        } catch (const std::exception&) {
+            return ERROR_OVERFLOW;
+        }
+
+        return RESULT_SUCCESS;
+    }
+
     static SteadyClockTimePoint GetRandom() {
         return {0, Common::UUID::Generate()};
     }
-- 
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