1 /* Basic data types for Objective C.
2 Copyright (C) 1993, 1995 Free Software Foundation, Inc.
4 This file is part of GNU CC.
6 GNU CC is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 GNU CC is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GNU CC; see the file COPYING. If not, write to
18 the Free Software Foundation, 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
21 /* As a special exception, if you link this library with files
22 compiled with GCC to produce an executable, this does not cause
23 the resulting executable to be covered by the GNU General Public License.
24 This exception does not however invalidate any other reasons why
25 the executable file might be covered by the GNU General Public License. */
27 #ifndef __objc_INCLUDE_GNU
28 #define __objc_INCLUDE_GNU
37 ** Definition of the boolean type.
39 typedef unsigned char BOOL;
44 ** Definition of a selector. Selectors themselves are not unique, but
45 ** the sel_id is a unique identifier.
47 typedef const struct objc_selector
50 const char *sel_types;
54 sel_eq (SEL s1, SEL s2)
56 if (s1 == 0 || s2 == 0)
59 return s1->sel_id == s2->sel_id;
64 ** ObjC uses this typedef for untyped instances.
66 typedef struct objc_object {
67 struct objc_class* class_pointer;
71 ** Definition of method type. When retrieving the implementation of a
72 ** method, this is type of the pointer returned
74 typedef id (*IMP)(id, SEL, ...);
77 ** More simple types...
79 #define nil (id)0 /* id of Nil instance */
80 #define Nil (Class)0 /* id of Nil class */
81 typedef char *STR; /* String alias */
84 ** The compiler generates one of these structures for each class.
86 ** This structure is the definition for classes.
88 ** This structure is generated by the compiler in the executable and used by
89 ** the run-time during normal messaging operations. Therefore some members
90 ** change type. The compiler generates "char* const" and places a string in
91 ** the following member variables: super_class.
93 typedef struct objc_class *MetaClass;
94 typedef struct objc_class *Class;
96 MetaClass class_pointer; /* Pointer to the class's
98 struct objc_class* super_class; /* Pointer to the super
101 const char* name; /* Name of the class. */
102 long version; /* Unknown. */
103 unsigned long info; /* Bit mask. See class masks
105 long instance_size; /* Size in bytes of the class.
106 The sum of the class definition
109 struct objc_ivar_list* ivars; /* Pointer to a structure that
110 describes the instance
111 variables in the class
112 definition. NULL indicates
113 no instance variables. Does
114 not include super class
116 struct objc_method_list* methods; /* Linked list of instance
117 methods defined for the
119 struct sarray * dtable; /* Pointer to instance
120 method dispatch table. */
121 struct objc_class* subclass_list; /* Subclasses */
122 struct objc_class* sibling_class;
124 struct objc_protocol_list *protocols; /* Protocols conformed to */
128 typedef struct objc_protocol {
129 struct objc_class* class_pointer;
131 struct objc_protocol_list *protocol_list;
132 struct objc_method_description_list *instance_methods, *class_methods;
139 typedef void* retval_t; /* return value */
140 typedef void(*apply_t)(void); /* function pointer */
143 char arg_regs[sizeof (char*)];
144 } *arglist_t; /* argument frame */
147 IMP objc_msg_lookup(id receiver, SEL op);
153 #endif /* not __objc_INCLUDE_GNU */