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Annotation of GNUtools/cc/objc/objects.c, revision 1.1

1.1     ! root        1: /* GNU Objective C Runtime class related functions
        !             2:    Copyright (C) 1993 Free Software Foundation, Inc.
        !             3: 
        !             4: Author: Kresten Krab Thorup
        !             5: 
        !             6: This file is part of GNU CC.
        !             7: 
        !             8: GNU CC is free software; you can redistribute it and/or modify it under the
        !             9:    terms of the GNU General Public License as published by the Free Software
        !            10:    Foundation; either version 2, or (at your option) any later version.
        !            11: 
        !            12: GNU CC is distributed in the hope that it will be useful, but WITHOUT ANY
        !            13:    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
        !            14:    FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
        !            15:    details.
        !            16: 
        !            17: You should have received a copy of the GNU General Public License along with
        !            18:    GNU CC; see the file COPYING.  If not, write to the Free Software
        !            19:    Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
        !            20: 
        !            21: /* As a special exception, if you link this library with files compiled with
        !            22:    GCC to produce an executable, this does not cause the resulting executable
        !            23:    to be covered by the GNU General Public License. This exception does not
        !            24:    however invalidate any other reasons why the executable file might be
        !            25:    covered by the GNU General Public License.  */
        !            26: 
        !            27: #include "../tconfig.h"         /* include defs of bzero for target */
        !            28: #include "runtime.h"           /* the kitchen sink */
        !            29: 
        !            30: id __objc_object_alloc(Class*);
        !            31: id __objc_object_dispose(id);
        !            32: id __objc_object_copy(id);
        !            33: 
        !            34: id (*_objc_object_alloc)(Class*) = __objc_object_alloc;
        !            35: id (*_objc_object_dispose)(id)    = __objc_object_dispose;
        !            36: id (*_objc_object_copy)(id)       = __objc_object_copy;
        !            37: 
        !            38: id
        !            39: class_create_instance(Class* class)
        !            40: {
        !            41:   id new = nil;
        !            42:   if (CLS_ISCLASS(class))
        !            43:     new = (*_objc_object_alloc)(class);
        !            44:   if (new!=nil)
        !            45:     {
        !            46:       memchr (new, 0, class->instance_size);
        !            47:       new->class_pointer = class;
        !            48:     }
        !            49:   return new;
        !            50: }
        !            51: 
        !            52: id
        !            53: object_copy(id object)
        !            54: {
        !            55:   if ((object!=nil)&&CLS_ISCLASS(object->class_pointer))
        !            56:     return (*_objc_object_copy)(object);
        !            57:   else
        !            58:     return nil;
        !            59: }
        !            60: 
        !            61: id
        !            62: object_dispose(id object)
        !            63: {
        !            64:   if ((object!=nil)&&CLS_ISCLASS(object->class_pointer))
        !            65:     {
        !            66:       if (_objc_object_dispose)
        !            67:         (*_objc_object_dispose)(object);
        !            68:       else
        !            69:         free(object);
        !            70:     }
        !            71:   return nil;
        !            72: }
        !            73: 
        !            74: id __objc_object_alloc(Class* class)
        !            75: {
        !            76:   return (id)__objc_xmalloc(class->instance_size);
        !            77: }
        !            78: 
        !            79: id __objc_object_dispose(id object) 
        !            80: {
        !            81:   free(object);
        !            82:   return 0;
        !            83: }
        !            84: 
        !            85: id __objc_object_copy(id object)
        !            86: {
        !            87:   id copy = class_create_instance(object->class_pointer);
        !            88:   memcpy(copy, object, object->class_pointer->instance_size);
        !            89:   return copy;
        !            90: }
        !            91: 
        !            92: 

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