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#include <stdio.h>
#include <stdlib.h>
#import "runtime.h"
#import "runtime-private.h"
#import "macros.h"
IMP (*objc_forward_handler)(id, SEL) = NULL;
IMP (*objc_forward_handler_stret)(id, SEL) = NULL;
common_not_found_handler(id obj, SEL sel, IMP (*lookup)(id, SEL),
common_method_not_found(id obj, SEL sel, IMP (*lookup)(id, SEL), void *forward)
IMP (*forward_handler)(id, SEL))
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* The reason for this is that a call to super is not possible
* before a message to the class has been sent and it thus has
* been initialized together with its superclasses.
*/
return lookup(obj, sel);
}
/* Try resolveClassMethod:/resolveInstanceMethod: */
if (class_isMetaClass(object_getClass(obj))) {
Class cls = object_getClass(obj);
if (class_respondsToSelector(cls,
@selector(resolveClassMethod:)) &&
[obj resolveClassMethod: sel]) {
if (!class_respondsToSelector(cls, sel))
OBJC_ERROR("[%s resolveClassMethod: %s] "
"returned true without adding the method!",
class_getName(obj), sel_getName(sel));
return lookup(obj, sel);
}
} else {
Class cls = object_getClass(obj);
Class metacls = object_getClass(cls);
if (class_respondsToSelector(metacls,
@selector(resolveInstanceMethod:)) &&
[cls resolveInstanceMethod: sel]) {
if (!class_respondsToSelector(cls, sel))
OBJC_ERROR("[%s resolveInstanceMethod: %s] "
"returned true without adding the method!",
class_getName(object_getClass(obj)),
sel_getName(sel));
return lookup(obj, sel);
}
}
if (forward_handler != NULL)
return forward_handler(obj, sel);
if (forward != NULL)
return forward;
OBJC_ERROR("Selector %c[%s] is not implemented for class %s!",
(is_class ? '+' : '-'), sel_getName(sel), object_getClassName(obj));
}
IMP
objc_not_found_handler(id obj, SEL sel)
objc_method_not_found(id obj, SEL sel)
{
return common_not_found_handler(obj, sel, objc_msg_lookup,
objc_forward_handler);
return common_method_not_found(obj, sel, objc_msg_lookup,
forward_handler);
}
IMP
objc_not_found_handler_stret(id obj, SEL sel)
objc_method_not_found_stret(id obj, SEL sel)
{
return common_not_found_handler(obj, sel, objc_msg_lookup_stret,
objc_forward_handler_stret);
return common_method_not_found(obj, sel, objc_msg_lookup_stret,
forward_handler_stret);
}
void
objc_setForwardHandler(void *forward, void *forward_stret)
{
forward_handler = forward;
forward_handler_stret = forward_stret;
}
bool
class_respondsToSelector(Class cls, SEL sel)
{
if (cls == Nil)
return false;
return (objc_sparsearray_get(cls->dtable, (uint32_t)sel->uid) != NULL);
}
#ifndef OF_ASM_LOOKUP
static id
nil_method(id self, SEL _cmd)
{
return nil;
}
static OF_INLINE IMP
common_lookup(id obj, SEL sel, IMP (*not_found_handler)(id, SEL))
common_lookup(id obj, SEL sel, IMP (*not_found)(id, SEL))
{
IMP imp;
if (obj == nil)
return (IMP)nil_method;
imp = objc_sparsearray_get(object_getClass(obj)->dtable,
(uint32_t)sel->uid);
if (imp == NULL)
return not_found_handler(obj, sel);
return not_found(obj, sel);
return imp;
}
IMP
objc_msg_lookup(id obj, SEL sel)
{
return common_lookup(obj, sel, objc_not_found_handler);
return common_lookup(obj, sel, objc_method_not_found);
}
IMP
objc_msg_lookup_stret(id obj, SEL sel)
{
return common_lookup(obj, sel, objc_not_found_handler_stret);
return common_lookup(obj, sel, objc_method_not_found_stret);
}
static OF_INLINE IMP
common_lookup_super(struct objc_super *super, SEL sel,
IMP (*not_found_handler)(id, SEL))
IMP (*not_found)(id, SEL))
{
IMP imp;
if (super->self == nil)
return (IMP)nil_method;
imp = objc_sparsearray_get(super->cls->dtable, (uint32_t)sel->uid);
if (imp == NULL)
return not_found_handler(super->self, sel);
return not_found(super->self, sel);
return imp;
}
IMP
objc_msg_lookup_super(struct objc_super *super, SEL sel)
{
return common_lookup_super(super, sel, objc_not_found_handler);
return common_lookup_super(super, sel, objc_method_not_found);
}
IMP
objc_msg_lookup_super_stret(struct objc_super *super, SEL sel)
{
return common_lookup_super(super, sel, objc_not_found_handler_stret);
return common_lookup_super(super, sel, objc_method_not_found_stret);
}
#endif
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