/* GNU Objective C Runtime class related functions   Copyright (C) 1993-2026 Free Software Foundation, Inc.   Contributed by Kresten Krab Thorup This file is part of GCC. GCC is free software; you can redistribute it and/or modify it under theterms of the GNU General Public License as published by the Free SoftwareFoundation; either version 3, or (at your option) any later version. GCC is distributed in the hope that it will be useful, but WITHOUT ANYWARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESSFOR A PARTICULAR PURPOSE.  See the GNU General Public License for moredetails. Under Section 7 of GPL version 3, you are granted additionalpermissions described in the GCC Runtime Library Exception, version3.1, as published by the Free Software Foundation. You should have received a copy of the GNU General Public License anda copy of the GCC Runtime Library Exception along with this program;see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see<http://www.gnu.org/licenses/>.  */ #include "objc-private/common.h"#include "objc/runtime.h"#include "objc/thr.h"                   /* Required by objc-private/runtime.h.  */#include "objc-private/module-abi-8.h"  /* For CLS_ISCLASS and similar.  */#include "objc-private/runtime.h"	/* the kitchen sink */ #include <string.h>                     /* For memcpy()  */ #if OBJC_WITH_GC# include <gc/gc.h># include <gc/gc_typed.h>#endif /* FIXME: The semantics of extraBytes are not really clear.  */inlineidclass_createInstance (Class class, size_t extraBytes){  id new = nil; #if OBJC_WITH_GC  if (CLS_ISCLASS (class))    new = (id) GC_malloc_explicitly_typed (class->instance_size + extraBytes,					   (GC_descr)class->gc_object_type);#else  if (CLS_ISCLASS (class))    new = (id) objc_calloc (class->instance_size + extraBytes, 1);#endif   if (new != nil)    {      /* There is no need to zero the memory, since both	 GC_malloc_explicitly_typed and objc_calloc return zeroed	 memory.  */      new->class_pointer = class;    }   /* TODO: Invoke C++ constructors on all appropriate C++ instance     variables of the new object.  */   return new;} /* Traditional GNU Objective-C Runtime API.  */idobject_copy (id object, size_t extraBytes){  if ((object != nil) && CLS_ISCLASS (object->class_pointer))    {      /* TODO: How should it work with C++ constructors ? */      id copy = class_createInstance (object->class_pointer, extraBytes);      memcpy (copy, object, object->class_pointer->instance_size + extraBytes);      return copy;    }  else    return nil;} idobject_dispose (id object){  if ((object != nil) && CLS_ISCLASS (object->class_pointer))    {      /* TODO: Invoke C++ destructors on all appropriate C++ instance	 variables.  But what happens with the garbage collector ?	 Would object_dispose() be ever called in that case ?  */       objc_free (object);    }  return nil;} const char *object_getClassName (id object){  if (object != nil)    return object->class_pointer->name;  else    return "Nil";} Classobject_setClass (id object, Class class_){  if (object == nil)    return Nil;  else    {      Class old_class = object->class_pointer;       object->class_pointer = class_;      return old_class;    }}