1/* Basic data types for Objective C.
2 Copyright (C) 1993, 1995, 1996, 2004 Free Software Foundation, Inc.
3 4This file is part of GCC.
5 6GCC is free software; you can redistribute it and/or modify
7it under the terms of the GNU General Public License as published by
8the Free Software Foundation; either version 2, or (at your option)
9any later version.
10 11GCC is distributed in the hope that it will be useful,
12but WITHOUT ANY WARRANTY; without even the implied warranty of
13MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14GNU General Public License for more details.
15 16You should have received a copy of the GNU General Public License
17along with GCC; see the file COPYING. If not, write to
18the Free Software Foundation, 59 Temple Place - Suite 330,
19Boston, MA 02111-1307, USA. */ 20 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. */ 26 27#ifndef __objc_INCLUDE_GNU
28#define __objc_INCLUDE_GNU
29 30#ifdef __cplusplus
31extern"C" {
32#endif 33 34 #include <stddef.h>
35 36/* 37** Definition of the boolean type.
38*/ 39#ifdef __vxworks
40 typedef int BOOL;
41#else 42 typedef unsigned char BOOL;
43#endif 44#define YES (BOOL)1
45#define NO (BOOL)0
46 47/* 48** Definition of a selector. Selectors themselves are not unique, but
49** the sel_id is a unique identifier.
50*/ 51 typedef conststruct objc_selector
52{
53void *sel_id;
54constchar *sel_types;
55 } *SEL;
56 57 inline static BOOL
58sel_eq (SEL s1, SEL s2)
59{
60if (s1 == 0 || s2 == 0)
61return s1 == s2;
62else 63return s1->sel_id == s2->sel_id;
64}
65 66 67/* 68** ObjC uses this typedef for untyped instances.
69*/ 70 typedef struct objc_object {
71struct objc_class* class_pointer;
72 } *id;
73 74/* 75** Definition of method type. When retrieving the implementation of a
76** method, this is type of the pointer returned. The idea of the
77** definition of IMP is to represent a 'pointer to a general function
78** taking an id, a SEL, followed by other unspecified arguments'. You
79** must always cast an IMP to a pointer to a function taking the
80** appropriate, specific types for that function, before calling it -
81** to make sure the appropriate arguments are passed to it. The code
82** generated by the compiler to perform method calls automatically
83** does this cast inside method calls.
84*/ 85 typedef id (*IMP)(id, SEL, ...);
86 87/* 88** More simple types...
89*/ 90#define nil (id)0 /* id of Nil instance */
91#define Nil (Class)0 /* id of Nil class */
92 typedef char *STR; /* String alias */ 93 94/* 95** The compiler generates one of these structures for each class.
96**
97** This structure is the definition for classes.
98**
99** This structure is generated by the compiler in the executable and used by
100** the run-time during normal messaging operations. Therefore some members
101** change type. The compiler generates "char* const" and places a string in
102** the following member variables: super_class.
103*/104 typedef struct objc_class *MetaClass;
105 typedef struct objc_class *Class;
106struct objc_class {
107 MetaClass class_pointer; /* Pointer to the class's
108 meta class. */109struct objc_class* super_class; /* Pointer to the super
110 class. NULL for class
111 Object. */112constchar* name; /* Name of the class. */113long version; /* Unknown. */114 unsigned long info; /* Bit mask. See class masks
115 defined above. */116long instance_size; /* Size in bytes of the class.
117 The sum of the class
118 definition and all super
119 class definitions. */120struct objc_ivar_list* ivars; /* Pointer to a structure that
121 describes the instance
122 variables in the class
123 definition. NULL indicates
124 no instance variables. Does
125 not include super class
126 variables. */127struct objc_method_list* methods; /* Linked list of instance
128 methods defined for the
129 class. */130struct sarray * dtable; /* Pointer to instance
131 method dispatch table. */132struct objc_class* subclass_list; /* Subclasses */133struct objc_class* sibling_class;
134135struct objc_protocol_list *protocols; /* Protocols conformed to */136void* gc_object_type;
137};
138139#ifndef __OBJC__
140 typedef struct objc_protocol {
141struct objc_class* class_pointer;
142char *protocol_name;
143struct objc_protocol_list *protocol_list;
144struct objc_method_description_list *instance_methods, *class_methods;
145} Protocol;
146147#else /* __OBJC__ */
148@class Protocol;
149#endif150151 typedef void* retval_t; /* return value */152 typedef void(*apply_t)(void); /* function pointer */153typedef union arglist {
154char *arg_ptr;
155char arg_regs[sizeof (char*)];
156 } *arglist_t; /* argument frame */157158159 IMP objc_msg_lookup(id receiver, SEL op);
160161#ifdef __cplusplus
162}
163#endif164165#endif /* not __objc_INCLUDE_GNU */