/* Basic data types for Objective C. Copyright (C) 1993, 1995, 1996, 2004 Free Software Foundation, Inc. This file is part of GCC. GCC is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. GCC is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with GCC; see the file COPYING. If not, write to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ /* As a special exception, if you link this library with files compiled with GCC to produce an executable, this does not cause the resulting executable to be covered by the GNU General Public License. This exception does not however invalidate any other reasons why the executable file might be covered by the GNU General Public License. */ #ifndef __objc_INCLUDE_GNU #define __objc_INCLUDE_GNU #ifdef __cplusplus extern "C" { #endif #include <stddef.h> /* ** Definition of the boolean type. */ #ifdef __vxworks typedef int BOOL; #else typedef unsigned char BOOL; #endif #define YES (BOOL)1 #define NO (BOOL)0 /* ** Definition of a selector. Selectors themselves are not unique, but ** the sel_id is a unique identifier. */ typedef const struct objc_selector { void *sel_id; const char *sel_types; } *SEL; inline static BOOL sel_eq (SEL s1, SEL s2) { if (s1 == 0 || s2 == 0) return s1 == s2; else return s1->sel_id == s2->sel_id; } /* ** ObjC uses this typedef for untyped instances. */ typedef struct objc_object { struct objc_class* class_pointer; } *id; /* ** Definition of method type. When retrieving the implementation of a ** method, this is type of the pointer returned. The idea of the ** definition of IMP is to represent a 'pointer to a general function ** taking an id, a SEL, followed by other unspecified arguments'. You ** must always cast an IMP to a pointer to a function taking the ** appropriate, specific types for that function, before calling it - ** to make sure the appropriate arguments are passed to it. The code ** generated by the compiler to perform method calls automatically ** does this cast inside method calls. */ typedef id (*IMP)(id, SEL, ...); /* ** More simple types... */ #define nil (id)0 /* id of Nil instance */ #define Nil (Class)0 /* id of Nil class */ typedef char *STR; /* String alias */ /* ** The compiler generates one of these structures for each class. ** ** This structure is the definition for classes. ** ** This structure is generated by the compiler in the executable and used by ** the run-time during normal messaging operations. Therefore some members ** change type. The compiler generates "char* const" and places a string in ** the following member variables: super_class. */ typedef struct objc_class *MetaClass; typedef struct objc_class *Class; struct objc_class { MetaClass class_pointer; /* Pointer to the class's meta class. */ struct objc_class* super_class; /* Pointer to the super class. NULL for class Object. */ const char* name; /* Name of the class. */ long version; /* Unknown. */ unsigned long info; /* Bit mask. See class masks defined above. */ long instance_size; /* Size in bytes of the class. The sum of the class definition and all super class definitions. */ struct objc_ivar_list* ivars; /* Pointer to a structure that describes the instance variables in the class definition. NULL indicates no instance variables. Does not include super class variables. */ struct objc_method_list* methods; /* Linked list of instance methods defined for the class. */ struct sarray * dtable; /* Pointer to instance method dispatch table. */ struct objc_class* subclass_list; /* Subclasses */ struct objc_class* sibling_class; struct objc_protocol_list *protocols; /* Protocols conformed to */ void* gc_object_type; }; #ifndef __OBJC__ typedef struct objc_protocol { struct objc_class* class_pointer; char *protocol_name; struct objc_protocol_list *protocol_list; struct objc_method_description_list *instance_methods, *class_methods; } Protocol; #else /* __OBJC__ */ @class Protocol; #endif typedef void* retval_t; /* return value */ typedef void(*apply_t)(void); /* function pointer */ typedef union arglist { char *arg_ptr; char arg_regs[sizeof (char*)]; } *arglist_t; /* argument frame */ IMP objc_msg_lookup(id receiver, SEL op); #ifdef __cplusplus } #endif #endif /* not __objc_INCLUDE_GNU */