From bf0127d0ae7f36b30aaf0672cd936fa3ae768f1a Mon Sep 17 00:00:00 2001
From: PabloMK7 <hackyglitch2@gmail.com>
Date: Tue, 5 Mar 2024 14:07:04 +0100
Subject: [PATCH] Add HOST_TICK and BUILD_PLATFORM to svcGetSystemInfo
 CITRA_INFORMATION type (#8)

* Add HOST_TICK to svcGetSystemInfo CITRA_INFORMATION type

* Add BUILD_PLATFORM
---
 src/core/hle/kernel/svc.cpp | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/src/core/hle/kernel/svc.cpp b/src/core/hle/kernel/svc.cpp
index 4cc2c0ad01..f3204fca1e 100644
--- a/src/core/hle/kernel/svc.cpp
+++ b/src/core/hle/kernel/svc.cpp
@@ -4,6 +4,7 @@
 
 #include <algorithm>
 #include <array>
+#include <chrono>
 #include <fmt/format.h>
 #include "common/archives.h"
 #include "common/logging/log.h"
@@ -268,8 +269,10 @@ enum class SystemInfoMemUsageRegion {
  */
 enum class SystemInfoCitraInformation {
     IS_CITRA = 0,          // Always set the output to 1, signaling the app is running on Citra.
+    HOST_TICK = 1,         // Tick reference from the host in ns, unaffected by lag or cpu speed.
     BUILD_NAME = 10,       // (ie: Nightly, Canary).
     BUILD_VERSION = 11,    // Build version.
+    BUILD_PLATFORM = 12,   // Build platform, see SystemInfoCitraPlatform.
     BUILD_DATE_PART1 = 20, // Build date first 7 characters.
     BUILD_DATE_PART2 = 21, // Build date next 7 characters.
     BUILD_DATE_PART3 = 22, // Build date next 7 characters.
@@ -280,6 +283,17 @@ enum class SystemInfoCitraInformation {
     BUILD_GIT_DESCRIPTION_PART2 = 41, // Git description (commit) last 7 characters.
 };
 
+/**
+ * Current officially supported platforms.
+ */
+enum class SystemInfoCitraPlatform {
+    PLATFORM_UNKNOWN = 0,
+    PLATFORM_WINDOWS = 1,
+    PLATFORM_LINUX = 2,
+    PLATFORM_APPLE = 3,
+    PLATFORM_ANDROID = 4,
+};
+
 /**
  * Accepted by the custom svcControlProcess.
  */
@@ -1740,12 +1754,31 @@ Result SVC::GetSystemInfo(s64* out, u32 type, s32 param) {
         case SystemInfoCitraInformation::IS_CITRA:
             *out = 1;
             break;
+        case SystemInfoCitraInformation::HOST_TICK:
+            *out = static_cast<s64>(std::chrono::duration_cast<std::chrono::nanoseconds>(
+                                        std::chrono::steady_clock::now().time_since_epoch())
+                                        .count());
+            break;
         case SystemInfoCitraInformation::BUILD_NAME:
             CopyStringPart(reinterpret_cast<char*>(out), Common::g_build_name, 0, sizeof(s64));
             break;
         case SystemInfoCitraInformation::BUILD_VERSION:
             CopyStringPart(reinterpret_cast<char*>(out), Common::g_build_version, 0, sizeof(s64));
             break;
+        case SystemInfoCitraInformation::BUILD_PLATFORM: {
+#if defined(_WIN32)
+            *out = static_cast<s64>(SystemInfoCitraPlatform::PLATFORM_WINDOWS);
+#elif defined(ANDROID)
+            *out = static_cast<s64>(SystemInfoCitraPlatform::PLATFORM_ANDROID);
+#elif defined(__linux__)
+            *out = static_cast<s64>(SystemInfoCitraPlatform::PLATFORM_LINUX);
+#elif defined(__APPLE__)
+            *out = static_cast<s64>(SystemInfoCitraPlatform::PLATFORM_APPLE);
+#else
+            *out = static_cast<s64>(SystemInfoCitraPlatform::PLATFORM_UNKNOWN);
+#endif
+            break;
+        }
         case SystemInfoCitraInformation::BUILD_DATE_PART1:
             CopyStringPart(reinterpret_cast<char*>(out), Common::g_build_date,
                            (sizeof(s64) - 1) * 0, sizeof(s64));