Implement support for parsing/interacting with NCAs. (#942)

* fs: implement support for interacting with ncas.

* spl: extend to use virtual keyslots

libraries/libstratosphere/include/stratosphere/fs/fs_speed_emulation.hpp

@@ -0,0 +1,32 @@
+/*
+ * Copyright (c) 2018-2020 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/>.
+ */
+#pragma once
+#include <stratosphere/fs/fs_common.hpp>
+
+namespace ams::fs {
+
+    enum class SpeedEmulationMode {
+        None    = 0,
+        Faster  = 1,
+        Slower  = 2,
+        Random  = 3,
+    };
+
+    /* TODO */
+    /* Result SetSpeedEmulationMode(SpeedEmulationMode mode); */
+    /* Result GetSpeedEmulationMode(SpeedEmulationMode *out); */
+
+}