atmosphere: extract API version management to common folder

Makefile

@@ -18,7 +18,7 @@ include $(DEVKITPRO)/libnx/switch_rules
 TARGET		:=	$(notdir $(CURDIR))
 SOURCES		:=	source
 DATA		:=	data
-INCLUDES	:=  include
+INCLUDES	:=  include ../../common/include
 
 #---------------------------------------------------------------------------------
 # options for code generation

include/stratosphere.hpp

@@ -33,3 +33,5 @@
 
 #include "stratosphere/waitablemanager.hpp"
 #include "stratosphere/multithreadedwaitablemanager.hpp"
+
+#include "stratosphere/version_check.hpp"

include/stratosphere/version_check.hpp

@@ -0,0 +1,66 @@
+/*
+ * Copyright (c) 2018 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 <switch.h>
+#include <atmosphere/version.h>
+
+static inline void GetAtmosphereApiVersion(u32 *major, u32 *minor, u32 *micro, u32 *target_fw, u32 *mkey_rev) {
+    if (R_FAILED(splInitialize())) {
+        fatalSimple(0xCAFE << 4 | 0xD);
+    }
+    
+    /* Check for exosphere API compatibility. */
+    u64 exosphere_cfg;
+    if (R_FAILED(splGetConfig((SplConfigItem)65000, &exosphere_cfg))) {
+        fatalSimple(0xCAFE << 4 | 0xE);
+    }
+    
+    if (mkey_rev) {
+        *mkey_rev  = (u32)((exosphere_cfg >> 0x00) & 0xFF);
+    }
+    
+    if (target_fw) {
+        *target_fw = (u32)((exosphere_cfg >> 0x08) & 0xFF);
+    }
+    
+    if (micro) {
+        *micro     = (u32)((exosphere_cfg >> 0x10) & 0xFF);
+    }
+    
+    if (minor) {
+        *minor     = (u32)((exosphere_cfg >> 0x18) & 0xFF);
+    }
+    
+    if (major) {
+        *major     = (u32)((exosphere_cfg >> 0x20) & 0xFF);
+    }
+    
+    splExit();
+}
+
+static inline u32 MakeAtmosphereVersion(u32 major, u32 minor, u32 micro) {
+    return (major << 16) | (minor << 8) | micro;
+}
+
+static inline void CheckAtmosphereVersion() {
+    u32 major, minor, micro;
+    GetAtmosphereApiVersion(&major, &minor, &micro, nullptr, nullptr);
+    
+    if (MakeAtmosphereVersion(major, minor, micro) < MakeAtmosphereVersion(ATMOSPHERE_RELEASE_VERSION_MAJOR, ATMOSPHERE_RELEASE_VERSION_MINOR, ATMOSPHERE_RELEASE_VERSION_MICRO)) {
+        fatalSimple(0xCAFE << 4 | 0xF);
+    }
+}