objc-act.h

gcc的组件

/* Declarations for objc-act.c.
   Copyright (C) 1990, 2000, 2001, 2002, 2003, 2004, 2005
   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, 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.  */

#ifndef GCC_OBJC_ACT_H
#define GCC_OBJC_ACT_H

/* For enum gimplify_status */
#include "tree-gimple.h"

/*** Language hooks ***/

bool objc_init (void);
const char *objc_printable_name (tree, int);
tree objc_get_callee_fndecl (tree);
void objc_finish_file (void);
tree objc_fold_obj_type_ref (tree, tree);
enum gimplify_status objc_gimplify_expr (tree *, tree *, tree *);

/* NB: The remaining public functions are prototyped in c-common.h, for the
   benefit of stub-objc.c and objc-act.c.  */

/* Objective-C structures */

#define CLASS_LANG_SLOT_ELTS		5
#define PROTOCOL_LANG_SLOT_ELTS		2
#define OBJC_INFO_SLOT_ELTS		2

/* KEYWORD_DECL */
#define KEYWORD_KEY_NAME(DECL) ((DECL)->decl_minimal.name)
#define KEYWORD_ARG_NAME(DECL) ((DECL)->decl_non_common.arguments)

/* INSTANCE_METHOD_DECL, CLASS_METHOD_DECL */
#define METHOD_SEL_NAME(DECL) ((DECL)->decl_minimal.name)
#define METHOD_SEL_ARGS(DECL) ((DECL)->decl_non_common.arguments)
#define METHOD_ADD_ARGS(DECL) ((DECL)->decl_non_common.result)
#define METHOD_ADD_ARGS_ELLIPSIS_P(DECL) ((DECL)->decl_common.lang_flag_0)
#define METHOD_DEFINITION(DECL) ((DECL)->decl_common.initial)
#define METHOD_ENCODING(DECL) ((DECL)->decl_minimal.context)

/* CLASS_INTERFACE_TYPE, CLASS_IMPLEMENTATION_TYPE,
   CATEGORY_INTERFACE_TYPE, CATEGORY_IMPLEMENTATION_TYPE,
   PROTOCOL_INTERFACE_TYPE */
#define CLASS_NAME(CLASS) ((CLASS)->type.name)
#define CLASS_SUPER_NAME(CLASS) (TYPE_CHECK (CLASS)->type.context)
#define CLASS_IVARS(CLASS) TREE_VEC_ELT (TYPE_LANG_SLOT_1 (CLASS), 0)
#define CLASS_RAW_IVARS(CLASS) TREE_VEC_ELT (TYPE_LANG_SLOT_1 (CLASS), 1)
#define CLASS_NST_METHODS(CLASS) ((CLASS)->type.minval)
#define CLASS_CLS_METHODS(CLASS) ((CLASS)->type.maxval)
#define CLASS_STATIC_TEMPLATE(CLASS) TREE_VEC_ELT (TYPE_LANG_SLOT_1 (CLASS), 2)
#define CLASS_CATEGORY_LIST(CLASS) TREE_VEC_ELT (TYPE_LANG_SLOT_1 (CLASS), 3)
#define CLASS_PROTOCOL_LIST(CLASS) TREE_VEC_ELT (TYPE_LANG_SLOT_1 (CLASS), 4)
#define PROTOCOL_NAME(CLASS) ((CLASS)->type.name)
#define PROTOCOL_LIST(CLASS) TREE_VEC_ELT (TYPE_LANG_SLOT_1 (CLASS), 0)
#define PROTOCOL_NST_METHODS(CLASS) ((CLASS)->type.minval)
#define PROTOCOL_CLS_METHODS(CLASS) ((CLASS)->type.maxval)
#define PROTOCOL_FORWARD_DECL(CLASS) TREE_VEC_ELT (TYPE_LANG_SLOT_1 (CLASS), 1)
#define PROTOCOL_DEFINED(CLASS) TREE_USED (CLASS)

/* ObjC-specific information pertaining to RECORD_TYPEs are stored in
   the LANG_SPECIFIC structures, which may itself need allocating first.  */

/* The following three macros must be overridden (in objcp/objcp-decl.h)
   for Objective-C++.  */
#define TYPE_OBJC_INFO(TYPE) TYPE_LANG_SPECIFIC (TYPE)->objc_info
#define SIZEOF_OBJC_TYPE_LANG_SPECIFIC sizeof (struct lang_type)
#define ALLOC_OBJC_TYPE_LANG_SPECIFIC(NODE)				\
  do {									\
    TYPE_LANG_SPECIFIC (NODE) = GGC_CNEW (struct lang_type);		\
  } while (0)

#define TYPE_HAS_OBJC_INFO(TYPE)				\
	(TYPE_LANG_SPECIFIC (TYPE) && TYPE_OBJC_INFO (TYPE))
#define TYPE_OBJC_INTERFACE(TYPE) TREE_VEC_ELT (TYPE_OBJC_INFO (TYPE), 0)
#define TYPE_OBJC_PROTOCOL_LIST(TYPE) TREE_VEC_ELT (TYPE_OBJC_INFO (TYPE), 1)


#define INIT_TYPE_OBJC_INFO(TYPE)				\
	do							\
	  {							\
	    if (!TYPE_LANG_SPECIFIC (TYPE))			\
	      ALLOC_OBJC_TYPE_LANG_SPECIFIC(TYPE);		\
	    if (!TYPE_OBJC_INFO (TYPE))				\
	      TYPE_OBJC_INFO (TYPE)				\
		= make_tree_vec (OBJC_INFO_SLOT_ELTS);		\
	  }							\
	while (0)
#define DUP_TYPE_OBJC_INFO(DST, SRC)				\
	do							\
	  {							\
	    ALLOC_OBJC_TYPE_LANG_SPECIFIC(DST);			\
	    if (TYPE_LANG_SPECIFIC (SRC))			\
	      memcpy (TYPE_LANG_SPECIFIC (DST),			\
		      TYPE_LANG_SPECIFIC (SRC),			\
		      SIZEOF_OBJC_TYPE_LANG_SPECIFIC);		\
	    TYPE_OBJC_INFO (DST)				\
	      = make_tree_vec (OBJC_INFO_SLOT_ELTS);		\
	  }							\
	while (0)

#define TYPED_OBJECT(TYPE)					\
	(TREE_CODE (TYPE) == RECORD_TYPE			\
	 && TYPE_HAS_OBJC_INFO (TYPE)				\
	 && TYPE_OBJC_INTERFACE (TYPE))
#define OBJC_TYPE_NAME(TYPE) TYPE_NAME(TYPE)
#define OBJC_SET_TYPE_NAME(TYPE, NAME) (TYPE_NAME (TYPE) = NAME)

/* Define the Objective-C or Objective-C++ language-specific tree codes.  */

#define DEFTREECODE(SYM, NAME, TYPE, LENGTH) SYM,
enum objc_tree_code {
#if defined (GCC_CP_TREE_H)
  LAST_BASE_TREE_CODE = LAST_CPLUS_TREE_CODE,
#else 
#if defined (GCC_C_TREE_H)
  LAST_BASE_TREE_CODE = LAST_C_TREE_CODE,
#else
  #error You must include <c-tree.h> or <cp/cp-tree.h> before <objc/objc-act.h>
#endif
#endif
#include "objc-tree.def"
  LAST_OBJC_TREE_CODE
};
#undef DEFTREECODE

/* Hash tables to manage the global pool of method prototypes.  */

typedef struct hashed_entry	*hash;
typedef struct hashed_attribute	*attr;

struct hashed_attribute GTY(())
{
  attr next;
  tree value;
};
struct hashed_entry GTY(())
{
  attr list;
  hash next;
  tree key;
};

extern GTY ((length ("SIZEHASHTABLE"))) hash *nst_method_hash_list;
extern GTY ((length ("SIZEHASHTABLE"))) hash *cls_method_hash_list;

#define SIZEHASHTABLE		257

/* Objective-C/Objective-C++ @implementation list.  */

struct imp_entry GTY(())
{
  struct imp_entry *next;
  tree imp_context;
  tree imp_template;
  tree class_decl;		/* _OBJC_CLASS_<my_name>; */
  tree meta_decl;		/* _OBJC_METACLASS_<my_name>; */
  BOOL_BITFIELD has_cxx_cdtors : 1;
};

extern GTY(()) struct imp_entry *imp_list;
extern GTY(()) int imp_count;	/* `@implementation' */
extern GTY(()) int cat_count;	/* `@category' */

extern GTY(()) enum tree_code objc_inherit_code;
extern GTY(()) int objc_public_flag;

/* Objective-C/Objective-C++ global tree enumeration.  */

enum objc_tree_index
{
    OCTI_STATIC_NST,
    OCTI_STATIC_NST_DECL,
    OCTI_SELF_ID,
    OCTI_UCMD_ID,

    OCTI_SELF_DECL,
    OCTI_UMSG_DECL,
    OCTI_UMSG_FAST_DECL,
    OCTI_UMSG_SUPER_DECL,
    OCTI_UMSG_STRET_DECL,
    OCTI_UMSG_SUPER_STRET_DECL,
    OCTI_GET_CLASS_DECL,
    OCTI_GET_MCLASS_DECL,
    OCTI_SUPER_TYPE,
    OCTI_SEL_TYPE,
    OCTI_ID_TYPE,
    OCTI_CLS_TYPE,
    OCTI_NST_TYPE,
    OCTI_PROTO_TYPE,

    OCTI_CLS_CHAIN,
    OCTI_ALIAS_CHAIN,
    OCTI_INTF_CHAIN,
    OCTI_PROTO_CHAIN,
    OCTI_IMPL_CHAIN,
    OCTI_CLS_REF_CHAIN,
    OCTI_SEL_REF_CHAIN,
    OCTI_IVAR_CHAIN,
    OCTI_CLS_NAMES_CHAIN,
    OCTI_METH_VAR_NAMES_CHAIN,
    OCTI_METH_VAR_TYPES_CHAIN,

    OCTI_SYMBOLS_DECL,
    OCTI_NST_VAR_DECL,
    OCTI_CLS_VAR_DECL,
    OCTI_NST_METH_DECL,
    OCTI_CLS_METH_DECL,
    OCTI_CLS_DECL,
    OCTI_MCLS_DECL,
    OCTI_SEL_TABLE_DECL,
    OCTI_MODULES_DECL,
    OCTI_GNU_INIT_DECL,