settings: implement KeyValueStore (#1659)

* settings: implement KeyValueStore and dependencies

* settings: update KeyValueStore for recent refactoring

* settings: address feedback

libraries/libstratosphere/source/settings/impl/settings_spl.cpp

@@ -0,0 +1,100 @@
+/*
+ * Copyright (c) Atmosphère-NX
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include <stratosphere.hpp>
+#include "settings_spl.hpp"
+
+namespace ams::settings::impl {
+
+    namespace {
+
+        struct SplConfig {
+            bool is_development;
+            SplHardwareType hardware_type;
+            bool is_quest;
+            u64 device_id_low;
+        };
+
+        constexpr SplHardwareType ConvertToSplHardwareType(spl::HardwareType type) {
+            switch (type) {
+                case spl::HardwareType::Icosa:
+                    return SplHardwareType_Icosa;
+                case spl::HardwareType::Copper:
+                    return SplHardwareType_Copper;
+                case spl::HardwareType::Hoag:
+                    return SplHardwareType_Hoag;
+                case spl::HardwareType::Iowa:
+                    return SplHardwareType_IcosaMariko;
+                case spl::HardwareType::Calcio:
+                    return SplHardwareType_Calcio;
+                case spl::HardwareType::Aula:
+                    return SplHardwareType_Aula;
+                AMS_UNREACHABLE_DEFAULT_CASE();
+            }
+        }
+
+        constexpr bool IsSplRetailInteractiveDisplayStateEnabled(spl::RetailInteractiveDisplayState quest_state) {
+            switch (quest_state) {
+                case spl::RetailInteractiveDisplayState_Disabled:
+                    return false;
+                case spl::RetailInteractiveDisplayState_Enabled:
+                    return true;
+                AMS_UNREACHABLE_DEFAULT_CASE();
+            }
+        }
+
+        SplConfig GetSplConfig() {
+            static constinit bool s_is_initialized = false;
+            static constinit SplConfig s_config;
+
+            if (!s_is_initialized) {
+                /* Initialize spl. */
+                spl::Initialize();
+                ON_SCOPE_EXIT { spl::Finalize(); };
+
+                /* Create the config. */
+                s_config = {
+                    .is_development = spl::IsDevelopment(),
+                    .hardware_type  = ConvertToSplHardwareType(spl::GetHardwareType()),
+                    .is_quest       = IsSplRetailInteractiveDisplayStateEnabled(spl::GetRetailInteractiveDisplayState()),
+                    .device_id_low  = spl::GetDeviceIdLow(),
+                };
+
+                /* Mark as initialized. */
+                s_is_initialized = true;
+            }
+
+            return s_config;
+        }
+
+    }
+
+    bool IsSplDevelopment() {
+        return GetSplConfig().is_development;
+    }
+
+    SplHardwareType GetSplHardwareType() {
+        return GetSplConfig().hardware_type;
+    }
+
+    bool IsSplRetailInteractiveDisplayStateEnabled() {
+        return GetSplConfig().is_quest;
+    }
+
+    u64 GetSplDeviceIdLow() {
+        return GetSplConfig().device_id_low;
+    }
+
+}