ObjFW  Diff

#ifndef __has_feature
# define __has_feature(x) 0
#endif

#if __has_feature(objc_arc)
# define OBJC_UNSAFE_UNRETAINED __unsafe_unretained
# define OBJC_BRIDGE __bridge
#else
# define OBJC_UNSAFE_UNRETAINED
# define OBJC_BRIDGE
#endif

typedef struct objc_class *Class;
typedef struct objc_object *id;
typedef const struct objc_selector *SEL;
typedef signed char BOOL;
typedef id (*IMP)(id, SEL, ...);

extern SEL sel_registerName(const char*);
extern const char* sel_getName(SEL);
extern BOOL sel_isEqual(SEL, SEL);
extern id objc_lookUpClass(const char*);
extern id objc_getClass(const char*);
extern id objc_getRequiredClass(const char*);

extern const char* class_getName(Class);
extern Class class_getSuperclass(Class);
extern BOOL class_isKindOfClass(Class, Class);
extern unsigned long class_getInstanceSize(Class);
extern BOOL class_respondsToSelector(Class, SEL);
extern BOOL class_conformsToProtocol(Class, Protocol*);
extern IMP class_getMethodImplementation(Class, SEL);
extern IMP class_replaceMethod(Class, SEL, IMP, const char*);
extern const char* objc_get_type_encoding(Class, SEL);



extern IMP objc_msg_lookup(id, SEL);
extern IMP objc_msg_lookup_super(struct objc_super*, SEL);
extern const char* protocol_getName(Protocol*);
extern BOOL protocol_isEqual(Protocol*, Protocol*);
extern BOOL protocol_conformsToProtocol(Protocol*, Protocol*);
extern void objc_exit(void);
extern objc_uncaught_exception_handler objc_setUncaughtExceptionHandler(
    objc_uncaught_exception_handler);
extern IMP (*objc_forward_handler)(id, SEL);
extern id objc_autorelease(id);
extern void* objc_autoreleasePoolPush(void);
extern void objc_autoreleasePoolPop(void*);
extern id _objc_rootAutorelease(id);

static inline Class
object_getClass(id obj_)
{
	struct objc_object *obj = (OBJC_BRIDGE struct objc_object*)obj_;

	return obj->isa;
}

static inline Class
object_setClass(id obj_, Class cls)
{
	struct objc_object *obj = (OBJC_BRIDGE struct objc_object*)obj_;
	Class old = obj->isa;

	obj->isa = cls;

	return old;
}

static inline const char*
object_getClassName(id obj)
{
	return class_getName(object_getClass(obj));
}

static inline BOOL
class_isMetaClass(Class cls_)
{
	struct objc_class *cls = (OBJC_BRIDGE struct objc_class*)cls_;

	return (cls->info & OBJC_CLASS_INFO_METACLASS);
}

#undef OBJC_UNSAFE_UNRETAINED
#undef OBJC_BRIDGE

#endif