--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/lib/C/accessor.h	Sun Jul 06 11:07:38 2014 +0100
@@ -0,0 +1,127 @@
+#ifndef __ACCESSOR_H
+#define __ACCESSOR_H
+
+#define __INITIAL_VALUE(...) __VA_ARGS__
+
+// variable declaration macros
+#define __DECLARE_VAR(type, name)\
+	__IEC_##type##_t name;
+#define __DECLARE_GLOBAL(type, domain, name)\
+	__IEC_##type##_t domain##__##name;\
+	static __IEC_##type##_t *GLOBAL__##name = &(domain##__##name);\
+	void __INIT_GLOBAL_##name(type value) {\
+		(*GLOBAL__##name).value = value;\
+	}\
+	IEC_BYTE __IS_GLOBAL_##name##_FORCED(void) {\
+		return (*GLOBAL__##name).flags & __IEC_FORCE_FLAG;\
+	}\
+	type* __GET_GLOBAL_##name(void) {\
+		return &((*GLOBAL__##name).value);\
+	}
+#define __DECLARE_GLOBAL_FB(type, domain, name)\
+	type domain##__##name;\
+	static type *GLOBAL__##name = &(domain##__##name);\
+	type* __GET_GLOBAL_##name(void) {\
+		return &(*GLOBAL__##name);\
+	}\
+	extern void type##_init__(type* data__, BOOL retain);
+#define __DECLARE_GLOBAL_LOCATION(type, location)\
+	extern type *location;
+#define __DECLARE_GLOBAL_LOCATED(type, resource, name)\
+	__IEC_##type##_p resource##__##name;\
+	static __IEC_##type##_p *GLOBAL__##name = &(resource##__##name);\
+	void __INIT_GLOBAL_##name(type value) {\
+		*((*GLOBAL__##name).value) = value;\
+	}\
+	IEC_BYTE __IS_GLOBAL_##name##_FORCED(void) {\
+		return (*GLOBAL__##name).flags & __IEC_FORCE_FLAG;\
+	}\
+	type* __GET_GLOBAL_##name(void) {\
+		return (*GLOBAL__##name).value;\
+	}
+#define __DECLARE_GLOBAL_PROTOTYPE(type, name)\
+    extern type* __GET_GLOBAL_##name(void);
+#define __DECLARE_EXTERNAL(type, name)\
+	__IEC_##type##_p name;
+#define __DECLARE_EXTERNAL_FB(type, name)\
+	type* name;
+#define __DECLARE_LOCATED(type, name)\
+	__IEC_##type##_p name;
+
+
+// variable initialization macros
+#define __INIT_RETAIN(name, retained)\
+    name.flags |= retained?__IEC_RETAIN_FLAG:0;
+#define __INIT_VAR(name, initial, retained)\
+	name.value = initial;\
+	__INIT_RETAIN(name, retained)
+#define __INIT_GLOBAL(type, name, initial, retained)\
+    {\
+	    static const type temp = initial;\
+	    __INIT_GLOBAL_##name(temp);\
+	    __INIT_RETAIN((*GLOBAL__##name), retained)\
+    }
+#define __INIT_GLOBAL_FB(type, name, retained)\
+	type##_init__(&(*GLOBAL__##name), retained);
+#define __INIT_GLOBAL_LOCATED(domain, name, location, retained)\
+	domain##__##name.value = location;\
+	__INIT_RETAIN(domain##__##name, retained)
+#define __INIT_EXTERNAL(type, global, name, retained)\
+    {\
+		name.value = __GET_GLOBAL_##global();\
+		__INIT_RETAIN(name, retained)\
+    }
+#define __INIT_EXTERNAL_FB(type, global, name, retained)\
+	name = __GET_GLOBAL_##global();
+#define __INIT_LOCATED(type, location, name, retained)\
+	{\
+		extern type *location;\
+		name.value = location;\
+		__INIT_RETAIN(name, retained)\
+    }
+#define __INIT_LOCATED_VALUE(name, initial)\
+	*(name.value) = initial;
+
+
+// variable getting macros
+#define __GET_VAR(name, ...)\
+	name.value __VA_ARGS__
+#define __GET_EXTERNAL(name, ...)\
+	((name.flags & __IEC_FORCE_FLAG) ? name.fvalue __VA_ARGS__ : (*(name.value)) __VA_ARGS__)
+#define __GET_EXTERNAL_FB(name, ...)\
+	__GET_VAR(((*name) __VA_ARGS__))
+#define __GET_LOCATED(name, ...)\
+	((name.flags & __IEC_FORCE_FLAG) ? name.fvalue __VA_ARGS__ : (*(name.value)) __VA_ARGS__)
+
+#define __GET_VAR_BY_REF(name, ...)\
+	((name.flags & __IEC_FORCE_FLAG) ? &(name.fvalue __VA_ARGS__) : &(name.value __VA_ARGS__))
+#define __GET_EXTERNAL_BY_REF(name, ...)\
+	((name.flags & __IEC_FORCE_FLAG) ? &(name.fvalue __VA_ARGS__) : &((*(name.value)) __VA_ARGS__))
+#define __GET_EXTERNAL_FB_BY_REF(name, ...)\
+	__GET_EXTERNAL_BY_REF(((*name) __VA_ARGS__))
+#define __GET_LOCATED_BY_REF(name, ...)\
+	((name.flags & __IEC_FORCE_FLAG) ? &(name.fvalue __VA_ARGS__) : &((*(name.value)) __VA_ARGS__))
+
+#define __GET_VAR_REF(name, ...)\
+	(&(name.value __VA_ARGS__))
+#define __GET_EXTERNAL_REF(name, ...)\
+	(&((*(name.value)) __VA_ARGS__))
+#define __GET_EXTERNAL_FB_REF(name, ...)\
+	(&(__GET_VAR(((*name) __VA_ARGS__))))
+#define __GET_LOCATED_REF(name, ...)\
+	(&((*(name.value)) __VA_ARGS__))
+
+
+// variable setting macros
+#define __SET_VAR(prefix, name, suffix, new_value)\
+	if (!(prefix name.flags & __IEC_FORCE_FLAG)) prefix name.value suffix = new_value
+#define __SET_EXTERNAL(prefix, name, suffix, new_value)\
+	{extern IEC_BYTE __IS_GLOBAL_##name##_FORCED();\
+    if (!(prefix name.flags & __IEC_FORCE_FLAG || __IS_GLOBAL_##name##_FORCED()))\
+		(*(prefix name.value)) suffix = new_value;}
+#define __SET_EXTERNAL_FB(prefix, name, suffix, new_value)\
+	__SET_VAR((*(prefix name)), suffix, new_value)
+#define __SET_LOCATED(prefix, name, suffix, new_value)\
+	if (!(prefix name.flags & __IEC_FORCE_FLAG)) *(prefix name.value) suffix = new_value
+
+#endif //__ACCESSOR_H