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#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;
IMP
objc_not_found_handler(id obj, SEL sel)
static IMP
common_not_found_handler(id obj, SEL sel, IMP (*lookup)(id, SEL),
IMP (*forward_handler)(id, SEL))
{
bool is_class = object_getClass(obj)->info & OBJC_CLASS_INFO_METACLASS;
if (!(object_getClass(obj)->info & OBJC_CLASS_INFO_INITIALIZED)) {
Class cls = (is_class ? (Class)obj : object_getClass(obj));
objc_initialize_class(cls);
if (!(cls->info & OBJC_CLASS_INFO_SETUP)) {
if (is_class)
return objc_msg_lookup(nil, sel);
return lookup(nil, sel);
else
OBJC_ERROR("Could not dispatch message for "
"incomplete class %s!", cls->name);
}
/*
* We don't need to handle the case that super was called.
* 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 objc_msg_lookup(obj, sel);
return lookup(obj, sel);
}
if (objc_forward_handler != NULL)
return objc_forward_handler(obj, sel);
if (forward_handler != NULL)
return forward_handler(obj, sel);
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)
{
return common_not_found_handler(obj, sel, objc_msg_lookup,
objc_forward_handler);
}
IMP
objc_not_found_handler_stret(id obj, SEL sel)
{
return common_not_found_handler(obj, sel, objc_msg_lookup_stret,
objc_forward_handler_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;
}
IMP
objc_msg_lookup(id obj, SEL sel)
static OF_INLINE IMP
common_lookup(id obj, SEL sel, IMP (*not_found_handler)(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 objc_not_found_handler(obj, sel);
return not_found_handler(obj, sel);
return imp;
}
IMP
objc_msg_lookup(id obj, SEL sel)
{
return common_lookup(obj, sel, objc_not_found_handler);
}
IMP
objc_msg_lookup_stret(id obj, SEL sel)
{
return common_lookup(obj, sel, objc_not_found_handler_stret);
}
static OF_INLINE IMP
objc_msg_lookup_super(struct objc_super *super, SEL sel)
common_lookup_super(struct objc_super *super, SEL sel,
IMP (*not_found_handler)(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 objc_not_found_handler(super->self, sel);
return not_found_handler(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);
}
IMP
objc_msg_lookup_super_stret(struct objc_super *super, SEL sel)
{
return common_lookup_super(super, sel, objc_not_found_handler_stret);
}
#endif
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