1/* Basic data types for Objective C. 2 Copyright (C) 1993, 1995, 1996 Free Software Foundation, Inc. 3 4This file is part of GNU CC. 5 6GNU CC 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 11GNU CC 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 GNU CC; 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 40typedef int BOOL; 41#else 42typedef 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*/ 51typedef const struct objc_selector 52{ 53 void *sel_id; 54 const char *sel_types; 55} *SEL; 56 57inline static BOOL 58sel_eq (SEL s1, SEL s2) 59{ 60 if (s1 == 0 || s2 == 0) 61 return s1 == s2; 62 else 63 return s1->sel_id == s2->sel_id; 64} 65 66 67/* 68** ObjC uses this typedef for untyped instances. 69*/ 70typedef struct objc_object { 71 struct 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 77*/ 78typedef id (*IMP)(id, SEL, ...); 79 80/* 81** More simple types... 82*/ 83#define nil (id)0 /* id of Nil instance */ 84#define Nil (Class)0 /* id of Nil class */ 85typedef char *STR; /* String alias */ 86 87/* 88** The compiler generates one of these structures for each class. 89** 90** This structure is the definition for classes. 91** 92** This structure is generated by the compiler in the executable and used by 93** the run-time during normal messaging operations. Therefore some members 94** change type. The compiler generates "char* const" and places a string in 95** the following member variables: super_class. 96*/ 97typedef struct objc_class *MetaClass; 98typedef struct objc_class *Class; 99struct objc_class { 100 MetaClass class_pointer; /* Pointer to the class's 101 meta class. */ 102 struct objc_class* super_class; /* Pointer to the super 103 class. NULL for class 104 Object. */ 105 const char* name; /* Name of the class. */ 106 long version; /* Unknown. */ 107 unsigned long info; /* Bit mask. See class masks 108 defined above. */ 109 long instance_size; /* Size in bytes of the class. 110 The sum of the class 111 definition and all super 112 class definitions. */ 113 struct objc_ivar_list* ivars; /* Pointer to a structure that 114 describes the instance 115 variables in the class 116 definition. NULL indicates 117 no instance variables. Does 118 not include super class 119 variables. */ 120 struct objc_method_list* methods; /* Linked list of instance 121 methods defined for the 122 class. */ 123 struct sarray * dtable; /* Pointer to instance 124 method dispatch table. */ 125 struct objc_class* subclass_list; /* Subclasses */ 126 struct objc_class* sibling_class; 127 128 struct objc_protocol_list *protocols; /* Protocols conformed to */ 129 void* gc_object_type; 130}; 131 132#ifndef __OBJC__ 133typedef struct objc_protocol { 134 struct objc_class* class_pointer; 135 char *protocol_name; 136 struct objc_protocol_list *protocol_list; 137 struct objc_method_description_list *instance_methods, *class_methods; 138} Protocol; 139 140#else /* __OBJC__ */ 141@class Protocol; 142#endif 143 144typedef void* retval_t; /* return value */ 145typedef void(*apply_t)(void); /* function pointer */ 146typedef union { 147 char *arg_ptr; 148 char arg_regs[sizeof (char*)]; 149} *arglist_t; /* argument frame */ 150 151 152IMP objc_msg_lookup(id receiver, SEL op); 153 154#ifdef __cplusplus 155} 156#endif 157 158#endif /* not __objc_INCLUDE_GNU */ 159