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- /* Implement classes and message passing for Objective C.
- Copyright (C) 1992 Free Software Foundation, Inc.
- Author: Steve Naroff.
-
- This file is part of GNU CC.
-
- GNU CC 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.
-
- GNU CC 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 GNU CC; see the file COPYING. If not, write to
- the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- /*
- * Purpose: This module implements the Objective-C 4.0 language.
- *
- * compatibility issues (with the Stepstone translator):
- *
- * - does not recognize the following 3.3 constructs.
- * @requires, @classes, @messages, = (...)
- * - methods with variable arguments must conform to ANSI standard.
- * - tagged structure definitions that appear in BOTH the interface
- * and implementation are not allowed.
- * - public/private: all instance variables are public within the
- * context of the implementation...I consider this to be a bug in
- * the translator.
- * - statically allocated objects are not supported. the user will
- * receive an error if this service is requested.
- *
- * code generation `options':
- *
- * - OBJC_INT_SELECTORS, OBJC_SELECTORS_WITHOUT_LABELS, NEXT_OBJC_RUNTIME
- */
-
- #include <stdio.h>
- #include "config.h"
- #include "tree.h"
- #include "c-tree.h"
- #include "c-lex.h"
- #include "flags.h"
- #include "objc-actions.h"
- #include "input.h"
-
- /* The GNU run time requires the selectors in a vector
- so it can store the operation numbers in them. */
- #ifndef NEXT_OBJC_RUNTIME
- #define OBJC_SELECTORS_WITHOUT_LABELS
- #endif
-
- /* Define the special tree codes that we use. */
-
- /* Table indexed by tree code giving a string containing a character
- classifying the tree code. Possibilities are
- t, d, s, c, r, <, 1 and 2. See objc-tree.def for details. */
-
- #define DEFTREECODE(SYM, NAME, TYPE, LENGTH) TYPE,
-
- char *objc_tree_code_type[] = {
- "x",
- #include "objc-tree.def"
- };
- #undef DEFTREECODE
-
- /* Table indexed by tree code giving number of expression
- operands beyond the fixed part of the node structure.
- Not used for types or decls. */
-
- #define DEFTREECODE(SYM, NAME, TYPE, LENGTH) LENGTH,
-
- int objc_tree_code_length[] = {
- 0,
- #include "objc-tree.def"
- };
- #undef DEFTREECODE
-
- /* Names of tree components.
- Used for printing out the tree and error messages. */
- #define DEFTREECODE(SYM, NAME, TYPE, LEN) NAME,
-
- char *objc_tree_code_name[] = {
- "@@dummy",
- #include "objc-tree.def"
- };
- #undef DEFTREECODE
-
- /* Set up for use of obstacks. */
-
- #include "obstack.h"
-
- #define obstack_chunk_alloc xmalloc
- #define obstack_chunk_free free
-
- /* This obstack is used to accumulate the encoding of a data type. */
- static struct obstack util_obstack;
- /* This points to the beginning of obstack contents,
- so we can free the whole contents. */
- char *util_firstobj;
-
- /* for encode_method_def */
- #include "rtl.h"
-
- #define OBJC_VERSION 2
-
- #define NULLT (tree) 0
-
- #define OBJC_ENCODE_INLINE_DEFS 0
- #define OBJC_ENCODE_DONT_INLINE_DEFS 1
-
- /*** Private Interface (procedures) ***/
-
- /* code generation */
-
- static void synth_module_prologue ();
- static char *build_module_descriptor ();
- static tree init_module_descriptor ();
- static void build_module_entry ();
- static tree build_objc_method_call ();
- static void build_message_selector_pool ();
- static void build_selector_translation_table ();
- static tree build_ivar_chain ();
-
- static tree build_ivar_template ();
- static tree build_method_template ();
- static tree build_private_template ();
- static void build_class_template ();
- static void build_category_template ();
- static tree build_super_template ();
-
- static void synth_forward_declarations ();
- static void generate_ivar_lists ();
- static void generate_dispatch_tables ();
- static void generate_shared_structures ();
-
- static tree build_msg_pool_reference ();
- static tree init_selector ();
- static tree build_keword_selector ();
- static tree synth_id_with_class_suffix ();
-
- /* misc. bookkeeping */
-
- typedef struct hashedEntry *hash;
- typedef struct hashedAttribute *attr;
-
- struct hashedAttribute {
- attr next;
- tree value;
- };
- struct hashedEntry {
- attr list;
- hash next;
- tree key;
- };
- static void hash_init ();
- static void hash_enter ();
- static hash hash_lookup ();
- static void hash_add_attr ();
- static tree lookup_method ();
- static tree lookup_instance_method_static ();
- static tree lookup_class_method_static ();
- static tree add_class ();
- static int add_selector_reference ();
- static void add_class_reference ();
- static int add_objc_string ();
-
- /* type encoding */
-
- static void encode_aggregate ();
- static void encode_bitfield ();
- static void encode_type ();
- static void encode_field_decl ();
-
- static void really_start_method ();
- static int comp_method_with_proto ();
- static int comp_proto_with_proto ();
- static tree get_arg_type_list ();
- static tree expr_last ();
-
- /* utilities for debugging and error diagnostics: */
-
- static void warn_with_method ();
- static void error_with_method ();
- static void error_with_ivar ();
- static char *gen_method_decl ();
- static char *gen_declaration ();
- static char *gen_declarator ();
- static int is_complex_decl ();
- static void adorn_decl ();
- static void dump_interfaces ();
-
- /*** Private Interface (data) ***/
-
- /* reserved tag definitions: */
-
- #define TYPE_ID "id"
- #define TAG_OBJECT "objc_object"
- #define TAG_CLASS "objc_class"
- #define TAG_SUPER "objc_super"
- #define TAG_SELECTOR "objc_selector"
-
- #define _TAG_CLASS "_objc_class"
- #define _TAG_IVAR "_objc_ivar"
- #define _TAG_IVAR_LIST "_objc_ivar_list"
- #define _TAG_METHOD "_objc_method"
- #define _TAG_METHOD_LIST "_objc_method_list"
- #define _TAG_CATEGORY "_objc_category"
- #define _TAG_MODULE "_objc_module"
- #define _TAG_SYMTAB "_objc_symtab"
- #define _TAG_SUPER "_objc_super"
-
- /* set by `continue_class ()' and checked by `is_public ()' */
-
- #define TREE_STATIC_TEMPLATE(record_type) (TREE_PUBLIC(record_type))
- #define TYPED_OBJECT(type) \
- (TREE_CODE (type) == RECORD_TYPE && TREE_STATIC_TEMPLATE (type))
-
- /* some commonly used instances of "identifier_node". */
-
- static tree self_id, _cmd_id;
-
- static tree self_decl, _msg_decl, _msgSuper_decl;
- static tree objc_getClass_decl, objc_getMetaClass_decl;
-
- static tree super_type, selector_type, id_type, class_type;
- static tree instance_type;
-
- static tree interface_chain = NULLT;
-
- /* chains to manage selectors that are referenced and defined in the module */
-
- static tree cls_ref_chain = NULLT; /* classes referenced */
- static tree sel_ref_chain = NULLT; /* selectors referenced */
- static tree sel_refdef_chain = NULLT; /* selectors references & defined */
- static int max_selector_index; /* total # of selector referenced */
-
- /* hash tables to manage the global pool of method prototypes */
-
- static hash *nst_method_hash_list = 0;
- static hash *cls_method_hash_list = 0;
-
- /* the following are used when compiling a class implementation.
- *
- * implementation_template will normally be an anInterface, however if
- * none exists this will be equal to implementation_context...it is
- * set in start_class.
- */
-
- /* backend data declarations */
-
- static tree _OBJC_SYMBOLS_decl;
- static tree _OBJC_INSTANCE_VARIABLES_decl, _OBJC_CLASS_VARIABLES_decl;
- static tree _OBJC_INSTANCE_METHODS_decl, _OBJC_CLASS_METHODS_decl;
- static tree _OBJC_CLASS_decl, _OBJC_METACLASS_decl;
- #ifdef OBJC_SELECTORS_WITHOUT_LABELS
- static tree _OBJC_SELECTOR_REFERENCES_decl;
- #endif
- static tree _OBJC_MODULES_decl;
- static tree _OBJC_STRINGS_decl;
-
- static tree implementation_context = NULLT,
- implementation_template = NULLT;
-
- struct imp_entry {
- struct imp_entry *next;
- tree imp_context;
- tree imp_template;
- tree class_decl; /* _OBJC_CLASS_<my_name>; */
- tree meta_decl; /* _OBJC_METACLASS_<my_name>; */
- };
- static struct imp_entry *imp_list = 0;
- static int imp_count = 0; /* `@implementation' */
- static int cat_count = 0; /* `@category' */
-
- static tree objc_class_template, objc_category_template, _PRIVATE_record;
- static tree _clsSuper_ref, __clsSuper_ref;
-
- static tree objc_method_template, objc_ivar_template;
- static tree objc_symtab_template, objc_module_template;
- static tree objc_super_template, objc_object_reference;
-
- static tree objc_object_id, objc_class_id;
- static tree _OBJC_SUPER_decl;
-
- static tree method_context = NULLT;
- static int method_slot = 0; /* used by start_method_def */
-
- #define BUFSIZE 512
-
- static char *errbuf; /* a buffer for error diagnostics */
-
- extern char *strcpy (), *strcat ();
-
- extern tree groktypename_in_parm_context ();
-
- extern struct obstack permanent_obstack, *current_obstack, *rtl_obstack;
-
- /* data imported from toplev.c */
-
- extern char *dump_base_name;
-
- /* Open and close the file for outputting class declarations, if requested. */
-
- int flag_gen_declaration = 0;
-
- FILE *gen_declaration_file;
-
- /* Warn if multiple methods are seen for the same selector, but with
- different argument types. */
-
- int warn_selector = 0;
-
- void
- lang_init ()
- {
- /* the beginning of the file is a new line; check for # */
- /* With luck, we discover the real source file's name from that
- and put it in input_filename. */
- ungetc (check_newline (), finput);
-
- /* If gen_declaration desired, open the output file. */
- if (flag_gen_declaration)
- {
- int dump_base_name_length = strlen (dump_base_name);
- register char *dumpname = (char *) xmalloc (dump_base_name_length + 7);
- strcpy (dumpname, dump_base_name);
- strcat (dumpname, ".decl");
- gen_declaration_file = fopen (dumpname, "w");
- if (gen_declaration_file == 0)
- pfatal_with_name (dumpname);
- }
-
- if (doing_objc_thang)
- init_objc ();
- }
-
- void
- objc_finish ()
- {
- if (doing_objc_thang)
- finish_objc (); /* Objective-C finalization */
-
- if (gen_declaration_file)
- fclose (gen_declaration_file);
- }
-
- void
- lang_finish ()
- {
- }
-
- int
- lang_decode_option (p)
- char *p;
- {
- if (!strcmp (p, "-lang-objc"))
- doing_objc_thang = 1;
- else if (!strcmp (p, "-gen-decls"))
- flag_gen_declaration = 1;
- else if (!strcmp (p, "-Wselector"))
- warn_selector = 1;
- else if (!strcmp (p, "-Wno-selector"))
- warn_selector = 0;
- else
- return c_decode_option (p);
-
- return 1;
- }
-
- static tree
- define_decl (declarator, declspecs)
- tree declarator;
- tree declspecs;
- {
- tree decl = start_decl (declarator, declspecs, 0);
- finish_decl (decl, NULLT, NULLT);
- return decl;
- }
-
- /*
- * rules for statically typed objects...called from `c-typeck.comptypes'.
- *
- * an assignment of the form `a' = `b' is permitted if:
- *
- * - `a' is of type "id".
- * - `a' and `b' are the same class type.
- * - `a' and `b' are of class types A and B such that B is a descendant
- * of A.
- */
-
- int
- maybe_objc_comptypes (lhs, rhs)
- tree lhs, rhs;
- {
- if (doing_objc_thang)
- return objc_comptypes (lhs, rhs);
- return 0;
- }
-
- int
- objc_comptypes (lhs, rhs)
- tree lhs;
- tree rhs;
- {
- /* `id' = `<class> *', `<class> *' = `id' */
-
- if ((TYPE_NAME (lhs) == objc_object_id && TYPED_OBJECT (rhs))
- || (TYPED_OBJECT (lhs) && TYPE_NAME (rhs) == objc_object_id))
- return 1;
-
- /* `id' = `Class', `Class' = `id' */
-
-
- else if ((TYPE_NAME (lhs) == objc_object_id &&
- TYPE_NAME (rhs) == objc_class_id) ||
- (TYPE_NAME (lhs) == objc_class_id &&
- TYPE_NAME (rhs) == objc_object_id))
- return 1;
-
- /* `<class> *' = `<class> *' */
-
- else if (TYPED_OBJECT (lhs) && TYPED_OBJECT (rhs))
- {
- tree lname = TYPE_NAME (lhs), rname = TYPE_NAME (rhs);
-
- if (lname == rname)
- return 1;
- else
- {
- /* if the left hand side is a super class of the right hand side,
- allow it...
- */
- tree rinter = lookup_interface (rname);
-
- while (rinter)
- {
- if (lname == CLASS_SUPER_NAME (rinter))
- return 1;
-
- rinter = lookup_interface (CLASS_SUPER_NAME (rinter));
- }
-
- return 0;
- }
- }
- else
- return 0;
- }
-
- /* Called from c-decl.c before all calls to rest_of_decl_compilation. */
-
- void
- maybe_objc_check_decl (decl)
- tree decl;
- {
- if (doing_objc_thang)
- objc_check_decl (decl);
- }
-
- void
- objc_check_decl (decl)
- tree decl;
- {
- tree type = TREE_TYPE (decl);
- static int alreadyWarned = 0;
-
- if (TREE_CODE (type) == RECORD_TYPE && TREE_STATIC_TEMPLATE (type))
- {
- if (!alreadyWarned)
- {
- error ("GNU compiler does not support statically allocated objects");
- alreadyWarned = 1;
- }
- error_with_decl (decl, "`%s' cannot be statically allocated");
- }
- }
-
- /* implement static typing. at this point, we know we have an interface... */
-
- tree
- get_static_reference (interface)
- tree interface;
- {
- return xref_tag (RECORD_TYPE, CLASS_NAME (interface));
- }
-
- /* Create and push a decl for a built-in external variable or field NAME.
- CODE says which.
- TYPE is its data type. */
-
- static tree
- create_builtin_decl (code, type, name)
- enum tree_code code;
- tree type;
- char *name;
- {
- tree decl = build_decl (code, get_identifier (name), type);
- if (code == VAR_DECL)
- {
- TREE_STATIC (decl) = 1;
- make_decl_rtl (decl, 0, 1);
- pushdecl (decl);
- }
- return decl;
- }
-
- /*
- * purpose: "play" parser, creating/installing representations
- * of the declarations that are required by Objective-C.
- *
- * model:
- *
- * type_spec--------->sc_spec
- * (tree_list) (tree_list)
- * | |
- * | |
- * identifier_node identifier_node
- */
- static void
- synth_module_prologue ()
- {
- tree expr_decl, temp_type;
-
- /* defined in `objc.h' */
- objc_object_id = get_identifier (TAG_OBJECT);
-
- objc_object_reference = xref_tag (RECORD_TYPE, objc_object_id);
-
- id_type = build_pointer_type (objc_object_reference);
-
- objc_class_id = get_identifier (TAG_CLASS);
-
- class_type = build_pointer_type (xref_tag (RECORD_TYPE, objc_class_id));
-
- /* Declare type of selector-objects that represent an operation name. */
-
- #ifdef OBJC_INT_SELECTORS
- /* `unsigned int' */
- selector_type = unsigned_type_node;
- #else
- /* `struct objc_selector *' */
- selector_type
- = build_pointer_type (xref_tag (RECORD_TYPE,
- get_identifier (TAG_SELECTOR)));
- #endif /* not OBJC_INT_SELECTORS */
-
- /* struct objc_object *objc_msgSend (id, SEL, ...); */
-
- temp_type
- = build_function_type (id_type,
- tree_cons (NULL_TREE, id_type,
- tree_cons (NULLT, selector_type, NULLT)));
-
- _msg_decl = builtin_function ("objc_msgSend", temp_type, NOT_BUILT_IN, 0);
-
- /* struct objc_object *objc_msgSendSuper (void *, SEL, ...); */
-
- temp_type
- = build_function_type (id_type,
- tree_cons (NULL_TREE, ptr_type_node,
- tree_cons (NULLT, selector_type, NULLT)));
-
- _msgSuper_decl = builtin_function ("objc_msgSendSuper",
- temp_type, NOT_BUILT_IN, 0);
-
- /* id objc_getClass (); */
-
- temp_type = build_function_type (id_type, NULLT);
-
- objc_getClass_decl
- = builtin_function ("objc_getClass", temp_type, NOT_BUILT_IN, 0);
-
- /* id objc_getMetaClass (); */
-
- objc_getMetaClass_decl
- = builtin_function ("objc_getMetaClass", temp_type, NOT_BUILT_IN, 0);
-
- /* extern SEL _OBJC_SELECTOR_REFERENCES[]; */
-
- #ifdef OBJC_SELECTORS_WITHOUT_LABELS
- _OBJC_SELECTOR_REFERENCES_decl
- = create_builtin_decl (VAR_DECL, build_array_type (selector_type, NULLT),
- "_OBJC_SELECTOR_REFERENCES");
- #endif
- }
-
- /*
- * custom "build_string ()" which sets TREE_TYPE!
- */
- static tree
- my_build_string (len, str)
- int len;
- char *str;
- {
- int wide_flag = 0;
- tree aString = build_string (len, str);
- /*
- * some code from "combine_strings ()", which is local to c-parse.y.
- */
- if (TREE_TYPE (aString) == int_array_type_node)
- wide_flag = 1;
-
- TREE_TYPE (aString) =
- build_array_type (wide_flag ? integer_type_node : char_type_node,
- build_index_type (build_int_2 (len - 1, 0)));
-
- TREE_CONSTANT (aString) = 1; /* puts string in the ".text" segment */
- TREE_STATIC (aString) = 1;
-
- return aString;
- }
-
- /* Take care of defining and initializing _OBJC_SYMBOLS. */
-
- /* Predefine the following data type:
-
- struct _objc_symtab {
- long sel_ref_cnt;
- SEL *refs;
- short cls_def_cnt;
- short cat_def_cnt;
- void *defs[cls_def_cnt + cat_def_cnt];
- }; */
-
- static void
- build_objc_symtab_template ()
- {
- tree field_decl, field_decl_chain, index;
-
- objc_symtab_template = start_struct (RECORD_TYPE, get_identifier (_TAG_SYMTAB));
-
- /* long sel_ref_cnt; */
-
- field_decl = create_builtin_decl (FIELD_DECL,
- long_integer_type_node,
- "sel_ref_cnt");
- field_decl_chain = field_decl;
-
- /* SEL *refs; */
-
- field_decl = create_builtin_decl (FIELD_DECL,
- build_pointer_type (selector_type),
- "refs");
- chainon (field_decl_chain, field_decl);
-
- /* short cls_def_cnt; */
-
- field_decl = create_builtin_decl (FIELD_DECL,
- short_integer_type_node,
- "cls_def_cnt");
- chainon (field_decl_chain, field_decl);
-
- /* short cat_def_cnt; */
-
- field_decl = create_builtin_decl (FIELD_DECL,
- short_integer_type_node,
- "cat_def_cnt");
- chainon (field_decl_chain, field_decl);
-
- /* void *defs[cls_def_cnt + cat_def_cnt]; */
-
- index = build_index_type (build_int_2 (imp_count + cat_count - 1, 0));
- field_decl = create_builtin_decl (FIELD_DECL,
- build_array_type (ptr_type_node, index),
- "defs");
- chainon (field_decl_chain, field_decl);
-
- finish_struct (objc_symtab_template, field_decl_chain);
- }
-
- /* Create the initial value for the `defs' field of _objc_symtab.
- This is a CONSTRUCTOR. */
-
- static tree
- init_def_list ()
- {
- tree expr, initlist = NULLT;
- struct imp_entry *impent;
-
- if (imp_count)
- for (impent = imp_list; impent; impent = impent->next)
- {
- if (TREE_CODE (impent->imp_context) == IMPLEMENTATION_TYPE)
- {
- expr = build_unary_op (ADDR_EXPR, impent->class_decl, 0);
- initlist = tree_cons (NULLT, expr, initlist);
- }
- }
-
- if (cat_count)
- for (impent = imp_list; impent; impent = impent->next)
- {
- if (TREE_CODE (impent->imp_context) == CATEGORY_TYPE)
- {
- expr = build_unary_op (ADDR_EXPR, impent->class_decl, 0);
- initlist = tree_cons (NULLT, expr, initlist);
- }
- }
- return build_nt (CONSTRUCTOR, NULLT, nreverse (initlist));
- }
-
- /* Construct the initial value for all of _objc_symtab. */
-
- static tree
- init_objc_symtab ()
- {
- tree initlist;
-
- /* sel_ref_cnt = { ..., 5, ... } */
-
- if (sel_ref_chain)
- initlist = build_tree_list (NULLT, build_int_2 (max_selector_index, 0));
- else
- initlist = build_tree_list (NULLT, build_int_2 (0, 0));
-
- /* refs = { ..., _OBJC_SELECTOR_REFERENCES, ... } */
-
- #ifndef OBJC_SELECTORS_WITHOUT_LABELS
- initlist = tree_cons (NULLT, build_int_2 (0, 0), initlist);
- #else
- if (sel_ref_chain)
- initlist = tree_cons (NULLT, _OBJC_SELECTOR_REFERENCES_decl, initlist);
- else
- initlist = tree_cons (NULLT, build_int_2 (0, 0), initlist);
- #endif
-
- /* cls_def_cnt = { ..., 5, ... } */
-
- initlist = tree_cons (NULLT, build_int_2 (imp_count, 0), initlist);
-
- /* cat_def_cnt = { ..., 5, ... } */
-
- initlist = tree_cons (NULLT, build_int_2 (cat_count, 0), initlist);
-
- /* cls_def = { ..., { &Foo, &Bar, ...}, ... } */
-
- if (imp_count || cat_count)
- initlist = tree_cons (NULLT, init_def_list (), initlist);
-
- return build_nt (CONSTRUCTOR, NULLT, nreverse (initlist));
- }
-
- /* Push forward-declarations of all the categories
- so that init_def_list can use them in a CONSTRUCTOR. */
-
- static void
- forward_declare_categories ()
- {
- struct imp_entry *impent;
- tree sav = implementation_context;
- for (impent = imp_list; impent; impent = impent->next)
- {
- if (TREE_CODE (impent->imp_context) == CATEGORY_TYPE)
- {
- /* Set an invisible arg to synth_id_with_class_suffix. */
- implementation_context = impent->imp_context;
- impent->class_decl
- = create_builtin_decl (VAR_DECL, objc_category_template,
- IDENTIFIER_POINTER (synth_id_with_class_suffix ("_OBJC_CATEGORY")));
- }
- }
- implementation_context = sav;
- }
-
- /* Create the declaration of _OBJC_SYMBOLS, with type `strict _objc_symtab'
- and initialized appropriately. */
-
- static void
- generate_objc_symtab_decl ()
- {
- tree sc_spec;
-
- if (!objc_category_template)
- build_category_template ();
-
- /* forward declare categories */
- if (cat_count)
- forward_declare_categories ();
-
- if (!objc_symtab_template)
- build_objc_symtab_template ();
-
- sc_spec = build_tree_list (NULLT, ridpointers[(int) RID_STATIC]);
-
- _OBJC_SYMBOLS_decl = start_decl (get_identifier ("_OBJC_SYMBOLS"),
- tree_cons (NULLT, objc_symtab_template, sc_spec), 1);
-
- finish_decl (_OBJC_SYMBOLS_decl, init_objc_symtab (), NULLT);
- }
-
- /*
- * tree_node------->tree_node----->...
- * | |
- * | (value) | (value)
- * | |
- * expr expr
- */
- static tree
- init_module_descriptor ()
- {
- tree initlist, expr;
-
- /* version = { 1, ... } */
-
- expr = build_int_2 (OBJC_VERSION, 0);
- initlist = build_tree_list (NULLT, expr);
-
- /* size = { ..., sizeof (struct objc_module), ... } */
-
- expr = build_int_2 (TREE_INT_CST_LOW (TYPE_SIZE (objc_module_template)) /
- BITS_PER_UNIT, 0);
- initlist = tree_cons (NULLT, expr, initlist);
-
- /* name = { ..., "foo.m", ... } */
-
- expr = build_msg_pool_reference (
- add_objc_string (get_identifier (input_filename)));
- initlist = tree_cons (NULLT, expr, initlist);
-
- /* symtab = { ..., _OBJC_SYMBOLS, ... } */
-
- if (_OBJC_SYMBOLS_decl)
- expr = build_unary_op (ADDR_EXPR, _OBJC_SYMBOLS_decl, 0);
- else
- expr = build_int_2 (0, 0);
- initlist = tree_cons (NULLT, expr, initlist);
-
- return build_nt (CONSTRUCTOR, NULLT, nreverse (initlist));
- }
-
- /* Write out the data structures to describe Objective C classes defined.
- If appropriate, compile and output a setup function to initialize them.
- Return a string which is the name of a function to call to initialize
- the Objective C data structures for this file (and perhaps for other files
- also). */
-
- static char *
- build_module_descriptor ()
- {
- tree decl_specs, field_decl, field_decl_chain;
-
- objc_module_template = start_struct (RECORD_TYPE, get_identifier (_TAG_MODULE));
-
- /* long version; */
-
- decl_specs = build_tree_list (NULLT, ridpointers[(int) RID_LONG]);
- field_decl = get_identifier ("version");
- field_decl = grokfield (input_filename, lineno, field_decl, decl_specs, NULLT);
- field_decl_chain = field_decl;
-
- /* long size; */
-
- decl_specs = build_tree_list (NULLT, ridpointers[(int) RID_LONG]);
- field_decl = get_identifier ("size");
- field_decl = grokfield (input_filename, lineno, field_decl, decl_specs, NULLT);
- chainon (field_decl_chain, field_decl);
-
- /* char *name; */
-
- decl_specs = build_tree_list (NULLT, ridpointers[(int) RID_CHAR]);
- field_decl = build1 (INDIRECT_REF, NULLT, get_identifier ("name"));
- field_decl = grokfield (input_filename, lineno, field_decl, decl_specs, NULLT);
- chainon (field_decl_chain, field_decl);
-
- /* struct objc_symtab *symtab; */
-
- decl_specs = get_identifier (_TAG_SYMTAB);
- decl_specs = build_tree_list (NULLT, xref_tag (RECORD_TYPE, decl_specs));
- field_decl = build1 (INDIRECT_REF, NULLT, get_identifier ("symtab"));
- field_decl = grokfield (input_filename, lineno, field_decl, decl_specs, NULLT);
- chainon (field_decl_chain, field_decl);
-
- finish_struct (objc_module_template, field_decl_chain);
-
- /* create an instance of "objc_module" */
-
- decl_specs = tree_cons (NULLT, objc_module_template,
- build_tree_list (NULLT, ridpointers[(int) RID_STATIC]));
-
- _OBJC_MODULES_decl = start_decl (get_identifier ("_OBJC_MODULES"),
- decl_specs, 1);
-
- finish_decl (_OBJC_MODULES_decl, init_module_descriptor (), NULLT);
-
- /* Mark the decl to avoid "defined but not used" warning. */
- DECL_IN_SYSTEM_HEADER (_OBJC_MODULES_decl) = 1;
-
- /* Generate a constructor call for the module descriptor.
- This code was generated by reading the grammar rules
- of c-parse.y; Therefore, it may not be the most efficient
- way of generating the requisite code. */
- #ifndef NEXT_OBJC_RUNTIME
- {
- tree parms, function_decl, decelerator, void_list_node;
- tree function_type;
- char *buf;
- char *global_object_name = 0;
- tree t;
-
- /* Use a global object (which is already required to be unique over
- the program) rather than the file name (which imposes extra
- constraints). -- Raeburn@MIT.EDU, 10 Jan 1990. */
-
- /* Find the name of some global object defined in this file. */
- for (t = getdecls (); t; t = TREE_CHAIN (t))
- if (TREE_PUBLIC (t) && !DECL_EXTERNAL (t) && DECL_INITIAL (t) != 0)
- {
- global_object_name = IDENTIFIER_POINTER (DECL_NAME (t));
- break;
- }
-
- /* If none, use the name of the file. */
- if (!global_object_name)
- {
- char *p, *q;
- global_object_name
- = (char *) alloca (strlen (main_input_filename) + 1);
-
- p = main_input_filename;
- q = global_object_name;
-
- /* Replace any weird characters in the file name. */
- for (; *p; p++)
- if (! ((*p >= '0' && *p <= '9')
- || (*p >= 'A' && *p <= 'Z')
- || (*p >= 'a' && *p <= 'z')))
- *q++ = '_';
- else
- *q++ = *p;
- *q = 0;
- }
-
- /* Make the constructor name from the name we have found. */
- buf = (char *) xmalloc (sizeof (CONSTRUCTOR_NAME_FORMAT)
- + strlen (global_object_name));
- sprintf (buf, CONSTRUCTOR_NAME_FORMAT, global_object_name);
-
- /* Declare void __objc_execClass (void*); */
-
- void_list_node = build_tree_list (NULL_TREE, void_type_node);
- function_type
- = build_function_type (void_type_node,
- tree_cons (NULL_TREE, ptr_type_node,
- void_list_node));
- function_decl = build_decl (FUNCTION_DECL,
- get_identifier ("__objc_execClass"),
- function_type);
- DECL_EXTERNAL (function_decl) = 1;
- TREE_PUBLIC (function_decl) = 1;
- pushdecl (function_decl);
- rest_of_decl_compilation (function_decl, 0, 0, 0);
-
- parms
- = build_tree_list (NULLT,
- build_unary_op (ADDR_EXPR, _OBJC_MODULES_decl, 0));
- decelerator = build_function_call (function_decl, parms);
-
- /* void __objc_file_init () {objc_execClass(&L_OBJC_MODULES);} */
-
- start_function (void_list_node,
- build_parse_node (CALL_EXPR, get_identifier (buf),
- /* This has the format of the output
- of get_parm_info. */
- tree_cons (NULL_TREE, NULL_TREE,
- void_list_node),
- NULL_TREE),
- 0, 0);
- #if 0 /* This should be turned back on later
- for the systems where collect is not needed. */
- /* Make these functions nonglobal
- so each file can use the same name. */
- TREE_PUBLIC (current_function_decl) = 0;
- #endif
- TREE_USED (current_function_decl) = 1;
- store_parm_decls ();
-
- assemble_external (function_decl);
- c_expand_expr_stmt (decelerator);
-
- finish_function (0);
-
- /* Return the name of the constructor function. */
- return buf;
- }
- #else /* NEXT_OBJC_RUNTIME */
- return 0;
- #endif /* NEXT_OBJC_RUNTIME */
- }
-
- /* extern const char _OBJC_STRINGS[]; */
-
- static void
- generate_forward_declaration_to_string_table ()
- {
- tree sc_spec, decl_specs, expr_decl;
-
- sc_spec = tree_cons (NULLT, ridpointers[(int) RID_EXTERN], NULLT);
- decl_specs = tree_cons (NULLT, ridpointers[(int) RID_CHAR], sc_spec);
-
- expr_decl = build_nt (ARRAY_REF, get_identifier ("_OBJC_STRINGS"), NULLT);
-
- _OBJC_STRINGS_decl = define_decl (expr_decl, decl_specs);
- }
-
- /* static char _OBJC_STRINGS[] = "..."; */
-
- static void
- build_message_selector_pool ()
- {
- tree sc_spec, decl_specs, expr_decl;
- tree chain, string_expr;
- int goolengthtmp = 0, msg_pool_size = 0;
- char *string_goo;
-
- sc_spec = tree_cons (NULLT, ridpointers[(int) RID_STATIC], NULLT);
- decl_specs = tree_cons (NULLT, ridpointers[(int) RID_CHAR], sc_spec);
-
- expr_decl = build_nt (ARRAY_REF, get_identifier ("_OBJC_STRINGS"), NULLT);
-
- _OBJC_STRINGS_decl = start_decl (expr_decl, decl_specs, 1);
-
- for (chain = sel_refdef_chain; chain; chain = TREE_CHAIN (chain))
- msg_pool_size += IDENTIFIER_LENGTH (TREE_VALUE (chain)) + 1;
-
- msg_pool_size++;
-
- string_goo = (char *)xmalloc (msg_pool_size);
- bzero (string_goo, msg_pool_size);
-
- for (chain = sel_refdef_chain; chain; chain = TREE_CHAIN (chain))
- {
- strcpy (string_goo + goolengthtmp, IDENTIFIER_POINTER (TREE_VALUE (chain)));
- goolengthtmp += IDENTIFIER_LENGTH (TREE_VALUE (chain)) + 1;
- }
-
- string_expr = my_build_string (msg_pool_size, string_goo);
-
- finish_decl (_OBJC_STRINGS_decl, string_expr, NULLT);
- }
-
- /*
- * synthesize the following expr: (char *)&_OBJC_STRINGS[<offset>]
- *
- * the cast stops the compiler from issuing the following message:
- *
- * grok.m: warning: initialization of non-const * pointer from const *
- * grok.m: warning: initialization between incompatible pointer types
- */
- static tree
- build_msg_pool_reference (offset)
- int offset;
- {
- tree expr = build_int_2 (offset, 0);
- tree cast;
-
- expr = build_array_ref (_OBJC_STRINGS_decl, expr);
- expr = build_unary_op (ADDR_EXPR, expr, 0);
-
- cast = build_tree_list (build_tree_list (NULLT, ridpointers[(int) RID_CHAR]),
- build1 (INDIRECT_REF, NULLT, NULLT));
- TREE_TYPE (expr) = groktypename (cast);
- return expr;
- }
-
- #ifndef OBJC_SELECTORS_WITHOUT_LABELS
- static tree
- build_selector_reference (idx)
- int idx;
- {
- tree ref, decl, name, ident;
- char buf[256];
- struct obstack *save_current_obstack = current_obstack;
- struct obstack *save_rtl_obstack = rtl_obstack;
-
- sprintf (buf, "_OBJC_SELECTOR_REFERENCES_%d", idx);
-
- /* new stuff */
- rtl_obstack = current_obstack = &permanent_obstack;
- ident = get_identifier (buf);
-
- if (IDENTIFIER_GLOBAL_VALUE (ident))
- decl = IDENTIFIER_GLOBAL_VALUE (ident); /* set by pushdecl() */
- else
- {
- decl = build_decl (VAR_DECL, ident, selector_type);
- DECL_EXTERNAL (decl) = 1;
- TREE_PUBLIC (decl) = 1;
- TREE_USED (decl) = 1;
-
- make_decl_rtl (decl, 0, 1); /* usually called from `rest_of_decl_compilation' */
- pushdecl_top_level (decl); /* our `extended/custom' pushdecl in c-decl.c */
- }
- current_obstack = save_current_obstack;
- rtl_obstack = save_rtl_obstack;
-
- return decl;
- }
- #endif
-
- static tree
- init_selector (offset)
- int offset;
- {
- tree expr = build_msg_pool_reference (offset);
- TREE_TYPE (expr) = selector_type; /* cast */
- return expr;
- }
-
- static void
- build_selector_translation_table ()
- {
- tree sc_spec, decl_specs, expr_decl;
- tree chain, initlist = NULLT;
- int offset = 0;
- #ifndef OBJC_SELECTORS_WITHOUT_LABELS
- tree decl, var_decl;
- int idx = 0;
- char buf[256];
- #else
- /* The corresponding pop_obstacks is in finish_decl,
- called at the end of this function. */
- push_obstacks_nochange ();
- #endif
-
- for (chain = sel_ref_chain; chain; chain = TREE_CHAIN (chain))
- {
- tree expr;
-
- #ifndef OBJC_SELECTORS_WITHOUT_LABELS
- sprintf (buf, "_OBJC_SELECTOR_REFERENCES_%d", idx);
- sc_spec = build_tree_list (NULLT, ridpointers[(int) RID_STATIC]);
-
- /* static SEL _OBJC_SELECTOR_REFERENCES_n = ...; */
- decl_specs = tree_cons (NULLT, selector_type, sc_spec);
- var_decl = get_identifier (buf);
-
- /* the `decl' that is returned from start_decl is the one that we
- * forward declared in `build_selector_reference()'
- */
- decl = start_decl (var_decl, decl_specs, 1);
- #endif
-
- expr = init_selector (offset);
-
- /* add one for the '\0' character */
- offset += IDENTIFIER_LENGTH (TREE_VALUE (chain)) + 1;
-
- #ifndef OBJC_SELECTORS_WITHOUT_LABELS
- finish_decl (decl, expr, NULLT);
- idx++;
- #else
- initlist = tree_cons (NULLT, expr, initlist);
- #endif
- }
-
- #ifdef OBJC_SELECTORS_WITHOUT_LABELS
- /* Cause the variable and its initial value to be actually output. */
- DECL_EXTERNAL (_OBJC_SELECTOR_REFERENCES_decl) = 0;
- TREE_STATIC (_OBJC_SELECTOR_REFERENCES_decl) = 1;
- /* NULL terminate the list and fix the decl for output. */
- initlist = tree_cons (NULLT, build_int_2 (0, 0), initlist);
- DECL_INITIAL (_OBJC_SELECTOR_REFERENCES_decl) = (tree) 1;
- initlist = build_nt (CONSTRUCTOR, NULLT, nreverse (initlist));
- finish_decl (_OBJC_SELECTOR_REFERENCES_decl, initlist, NULLT);
- #endif
- }
-
- static void
- add_class_reference (ident)
- tree ident;
- {
- tree chain;
-
- if (chain = cls_ref_chain)
- {
- tree tail;
- do
- {
- if (ident == TREE_VALUE (chain))
- return;
-
- tail = chain;
- chain = TREE_CHAIN (chain);
- }
- while (chain);
-
- /* append to the end of the list */
- TREE_CHAIN (tail) = perm_tree_cons (NULLT, ident, NULLT);
- }
- else
- cls_ref_chain = perm_tree_cons (NULLT, ident, NULLT);
- }
-
- /*
- * sel_ref_chain is a list whose "value" fields will be instances of
- * identifier_node that represent the selector.
- */
- static int
- add_selector_reference (ident)
- tree ident;
- {
- tree chain;
- int index = 0;
-
- /* this adds it to sel_refdef_chain, the global pool of selectors */
- add_objc_string (ident);
-
- if (chain = sel_ref_chain)
- {
- tree tail;
- do
- {
- if (ident == TREE_VALUE (chain))
- return index;
-
- index++;
- tail = chain;
- chain = TREE_CHAIN (chain);
- }
- while (chain);
-
- /* append to the end of the list */
- TREE_CHAIN (tail) = perm_tree_cons (NULLT, ident, NULLT);
- }
- else
- sel_ref_chain = perm_tree_cons (NULLT, ident, NULLT);
-
- max_selector_index++;
- return index;
- }
-
- /*
- * sel_refdef_chain is a list whose "value" fields will be instances of
- * identifier_node that represent the selector. It returns the offset of
- * the selector from the beginning of the _OBJC_STRINGS pool. This offset
- * is typically used by "init_selector ()" during code generation.
- */
- static int
- add_objc_string (ident)
- tree ident;
- {
- tree chain;
- int offset = 0;
-
- if (chain = sel_refdef_chain)
- {
- tree tail;
- do
- {
- if (ident == TREE_VALUE (chain))
- return offset;
-
- /* add one for the '\0' character */
- offset += IDENTIFIER_LENGTH (TREE_VALUE (chain)) + 1;
- tail = chain;
- chain = TREE_CHAIN (chain);
- }
- while (chain);
-
- /* append to the end of the list */
- TREE_CHAIN (tail) = perm_tree_cons (NULLT, ident, NULLT);
- }
- else
- sel_refdef_chain = perm_tree_cons (NULLT, ident, NULLT);
-
- return offset;
- }
-
- tree
- lookup_interface (ident)
- tree ident;
- {
- tree chain;
-
- for (chain = interface_chain; chain; chain = TREE_CHAIN (chain))
- {
- if (ident == CLASS_NAME (chain))
- return chain;
- }
- return NULLT;
- }
-
- static tree
- objc_copy_list (list, head)
- tree list;
- tree *head;
- {
- tree newlist = NULL_TREE, tail = NULL_TREE;
-
- while (list)
- {
- tail = copy_node (list);
-
- /* the following statement fixes a bug when inheriting instance
- variables that are declared to be bitfields. finish_struct () expects
- to find the width of the bitfield in DECL_INITIAL (), which it
- nulls out after processing the decl of the super class...rather
- than change the way finish_struct () works (which is risky),
- I create the situation it expects...s.naroff (7/23/89).
- */
- if (DECL_BIT_FIELD (tail) && DECL_INITIAL (tail) == 0)
- DECL_INITIAL (tail) = build_int_2 (DECL_FIELD_SIZE (tail), 0);
-
- newlist = chainon (newlist, tail);
- list = TREE_CHAIN (list);
- }
- *head = newlist;
- return tail;
- }
-
- /* used by:
- * build_private_template (), get_class_ivars (), and get_static_reference ().
- */
- static tree
- build_ivar_chain (interface)
- tree interface;
- {
- tree my_name, super_name, ivar_chain;
-
- my_name = CLASS_NAME (interface);
- super_name = CLASS_SUPER_NAME (interface);
-
- /* "leaf" ivars never get copied...there is no reason to. */
- ivar_chain = CLASS_IVARS (interface);
-
- while (super_name)
- {
- tree op1;
- tree super_interface = lookup_interface (super_name);
-
- if (!super_interface)
- {
- /* fatal did not work with 2 args...should fix */
- error ("Cannot find interface declaration for `%s', superclass of `%s'",
- IDENTIFIER_POINTER (super_name), IDENTIFIER_POINTER (my_name));
- exit (34);
- }
- if (super_interface == interface)
- {
- fatal ("Circular inheritance in interface declaration for `%s'",
- IDENTIFIER_POINTER (super_name));
- }
- interface = super_interface;
- my_name = CLASS_NAME (interface);
- super_name = CLASS_SUPER_NAME (interface);
-
- op1 = CLASS_IVARS (interface);
- if (op1)
- {
- tree head, tail = objc_copy_list (op1, &head);
-
- /* prepend super class ivars...make a copy of the list, we
- * do not want to alter the original.
- */
- TREE_CHAIN (tail) = ivar_chain;
- ivar_chain = head;
- }
- }
- return ivar_chain;
- }
-
- /*
- * struct <classname> {
- * struct objc_class *isa;
- * ...
- * };
- */
- static tree
- build_private_template (class)
- tree class;
- {
- tree ivar_context;
-
- if (CLASS_STATIC_TEMPLATE (class))
- {
- _PRIVATE_record = CLASS_STATIC_TEMPLATE (class);
- ivar_context = TYPE_FIELDS (CLASS_STATIC_TEMPLATE (class));
- }
- else
- {
- _PRIVATE_record = start_struct (RECORD_TYPE, CLASS_NAME (class));
-
- ivar_context = build_ivar_chain (class);
-
- finish_struct (_PRIVATE_record, ivar_context);
-
- CLASS_STATIC_TEMPLATE (class) = _PRIVATE_record;
-
- /* mark this record as class template - for class type checking */
- TREE_STATIC_TEMPLATE (_PRIVATE_record) = 1;
- }
- instance_type = groktypename (
- build_tree_list (build_tree_list (NULLT, _PRIVATE_record),
- build1 (INDIRECT_REF, NULLT, NULLT)));
- return ivar_context;
- }
-
- /*
- * struct objc_category {
- * char *category_name;
- * char *class_name;
- * struct objc_method_list *instance_methods;
- * struct objc_method_list *class_methods;
- * };
- */
- static void
- build_category_template ()
- {
- tree decl_specs, field_decl, field_decl_chain;
-
- objc_category_template = start_struct (RECORD_TYPE,
- get_identifier (_TAG_CATEGORY));
- /* char *category_name; */
-
- decl_specs = build_tree_list (NULLT, ridpointers[(int) RID_CHAR]);
- field_decl = build1 (INDIRECT_REF, NULLT, get_identifier ("category_name"));
- field_decl = grokfield (input_filename, lineno, field_decl, decl_specs, NULLT);
- field_decl_chain = field_decl;
-
- /* char *class_name; */
-
- decl_specs = build_tree_list (NULLT, ridpointers[(int) RID_CHAR]);
- field_decl = build1 (INDIRECT_REF, NULLT, get_identifier ("class_name"));
- field_decl = grokfield (input_filename, lineno, field_decl, decl_specs, NULLT);
- chainon (field_decl_chain, field_decl);
-
- /* struct objc_method_list *instance_methods; */
-
- decl_specs = build_tree_list (NULLT, xref_tag (RECORD_TYPE,
- get_identifier (_TAG_METHOD_LIST)));
- field_decl = build1 (INDIRECT_REF, NULLT, get_identifier ("instance_methods"));
- field_decl = grokfield (input_filename, lineno, field_decl, decl_specs, NULLT);
- chainon (field_decl_chain, field_decl);
-
- /* struct objc_method_list *class_methods; */
-
- decl_specs = build_tree_list (NULLT, xref_tag (RECORD_TYPE,
- get_identifier (_TAG_METHOD_LIST)));
- field_decl = build1 (INDIRECT_REF, NULLT, get_identifier ("class_methods"));
- field_decl = grokfield (input_filename, lineno, field_decl, decl_specs, NULLT);
- chainon (field_decl_chain, field_decl);
-
- finish_struct (objc_category_template, field_decl_chain);
- }
-
- /*
- * struct objc_class {
- * struct objc_class *isa;
- * struct objc_class *super_class;
- * char *name;
- * long version;
- * long info;
- * long instance_size;
- * struct objc_ivar_list *ivars;
- * struct objc_method_list *methods;
- * struct objc_cache *cache;
- * };
- */
- static void
- build_class_template ()
- {
- tree decl_specs, field_decl, field_decl_chain;
-
- objc_class_template = start_struct (RECORD_TYPE, get_identifier (_TAG_CLASS));
-
- /* struct objc_class *isa; */
-
- decl_specs = build_tree_list (NULLT, objc_class_template);
- field_decl = build1 (INDIRECT_REF, NULLT, get_identifier ("isa"));
- field_decl = grokfield (input_filename, lineno, field_decl, decl_specs, NULLT);
- field_decl_chain = field_decl;
-
- /* struct objc_class *super_class; */
-
- decl_specs = build_tree_list (NULLT, objc_class_template);
- field_decl = build1 (INDIRECT_REF, NULLT, get_identifier ("super_class"));
- field_decl = grokfield (input_filename, lineno, field_decl, decl_specs, NULLT);
- chainon (field_decl_chain, field_decl);
-
- /* char *name; */
-
- decl_specs = build_tree_list (NULLT, ridpointers[(int) RID_CHAR]);
- field_decl = build1 (INDIRECT_REF, NULLT, get_identifier ("name"));
- field_decl = grokfield (input_filename, lineno, field_decl, decl_specs, NULLT);
- chainon (field_decl_chain, field_decl);
-
- /* long version; */
-
- decl_specs = build_tree_list (NULLT, ridpointers[(int) RID_LONG]);
- field_decl = get_identifier ("version");
- field_decl = grokfield (input_filename, lineno, field_decl, decl_specs, NULLT);
- chainon (field_decl_chain, field_decl);
-
- /* long info; */
-
- decl_specs = build_tree_list (NULLT, ridpointers[(int) RID_LONG]);
- field_decl = get_identifier ("info");
- field_decl = grokfield (input_filename, lineno, field_decl, decl_specs, NULLT);
- chainon (field_decl_chain, field_decl);
-
- /* long instance_size; */
-
- decl_specs = build_tree_list (NULLT, ridpointers[(int) RID_LONG]);
- field_decl = get_identifier ("instance_size");
- field_decl = grokfield (input_filename, lineno, field_decl, decl_specs, NULLT);
- chainon (field_decl_chain, field_decl);
-
- /* struct objc_ivar_list *ivars; */
-
- decl_specs = build_tree_list (NULLT, xref_tag (RECORD_TYPE,
- get_identifier (_TAG_IVAR_LIST)));
- field_decl = build1 (INDIRECT_REF, NULLT, get_identifier ("ivars"));
- field_decl = grokfield (input_filename, lineno, field_decl, decl_specs, NULLT);
- chainon (field_decl_chain, field_decl);
-
- /* struct objc_method_list *methods; */
-
- decl_specs = build_tree_list (NULLT, xref_tag (RECORD_TYPE,
- get_identifier (_TAG_METHOD_LIST)));
- field_decl = build1 (INDIRECT_REF, NULLT, get_identifier ("methods"));
- field_decl = grokfield (input_filename, lineno, field_decl, decl_specs, NULLT);
- chainon (field_decl_chain, field_decl);
-
- /* struct objc_cache *cache; */
-
- decl_specs = build_tree_list (NULLT, xref_tag (RECORD_TYPE,
- get_identifier ("objc_cache")));
- field_decl = build1 (INDIRECT_REF, NULLT, get_identifier ("cache"));
- field_decl = grokfield (input_filename, lineno, field_decl, decl_specs, NULLT);
- chainon (field_decl_chain, field_decl);
-
- finish_struct (objc_class_template, field_decl_chain);
- }
-
- /*
- * generate appropriate forward declarations for an implementation
- */
- static void
- synth_forward_declarations ()
- {
- tree sc_spec, decl_specs, factory_id, anId;
-
- /* extern struct objc_class _OBJC_CLASS_<my_name>; */
-
- anId = synth_id_with_class_suffix ("_OBJC_CLASS");
-
- sc_spec = build_tree_list (NULLT, ridpointers[(int) RID_EXTERN]);
- decl_specs = tree_cons (NULLT, objc_class_template, sc_spec);
- _OBJC_CLASS_decl = define_decl (anId, decl_specs);
-
- /* extern struct objc_class _OBJC_METACLASS_<my_name>; */
-
- anId = synth_id_with_class_suffix ("_OBJC_METACLASS");
-
- _OBJC_METACLASS_decl = define_decl (anId, decl_specs);
-
- /* pre-build the following entities - for speed/convenience. */
-
- anId = get_identifier ("super_class");
- _clsSuper_ref = build_component_ref (_OBJC_CLASS_decl, anId);
- __clsSuper_ref = build_component_ref (_OBJC_METACLASS_decl, anId);
- }
-
- static void
- error_with_ivar (message, decl, rawdecl)
- char *message;
- tree decl;
- tree rawdecl;
- {
- count_error (0);
- fprintf (stderr, "%s:%d: ",
- DECL_SOURCE_FILE (decl), DECL_SOURCE_LINE (decl));
- bzero (errbuf, BUFSIZE);
- fprintf (stderr, "%s `%s'\n", message, gen_declaration (rawdecl, errbuf));
- }
-
- #define USERTYPE(t) (TREE_CODE (t) == RECORD_TYPE || \
- TREE_CODE (t) == UNION_TYPE || \
- TREE_CODE (t) == ENUMERAL_TYPE)
-
- static void
- check_ivars (inter, imp)
- tree inter;
- tree imp;
- {
- tree intdecls = CLASS_IVARS (inter);
- tree impdecls = CLASS_IVARS (imp);
- tree rawintdecls = CLASS_RAW_IVARS (inter);
- tree rawimpdecls = CLASS_RAW_IVARS (imp);
-
- while (1)
- {
- tree t1, t2;
-
- if (intdecls == 0 && impdecls == 0)
- break;
- if (intdecls == 0 || impdecls == 0)
- {
- error ("inconsistent instance variable specification");
- break;
- }
- t1 = TREE_TYPE (intdecls); t2 = TREE_TYPE (impdecls);
-
- if (!comptypes (t1, t2))
- {
- if (DECL_NAME (intdecls) == DECL_NAME (impdecls))
- {
- error_with_ivar ("conflicting instance variable type",
- impdecls, rawimpdecls);
- error_with_ivar ("previous declaration of",
- intdecls, rawintdecls);
- }
- else /* both the type and the name don't match */
- {
- error ("inconsistent instance variable specification");
- break;
- }
- }
- else if (DECL_NAME (intdecls) != DECL_NAME (impdecls))
- {
- error_with_ivar ("conflicting instance variable name",
- impdecls, rawimpdecls);
- error_with_ivar ("previous declaration of",
- intdecls, rawintdecls);
- }
- intdecls = TREE_CHAIN (intdecls);
- impdecls = TREE_CHAIN (impdecls);
- rawintdecls = TREE_CHAIN (rawintdecls);
- rawimpdecls = TREE_CHAIN (rawimpdecls);
- }
- }
-
- /* Set super_type to the data type node for struct objc_super *,
- first defining struct objc_super itself.
- This needs to be done just once per compilation. */
-
- static tree
- build_super_template ()
- {
- tree record, decl_specs, field_decl, field_decl_chain;
-
- record = start_struct (RECORD_TYPE, get_identifier (_TAG_SUPER));
-
- /* struct objc_object *self; */
-
- decl_specs = build_tree_list (NULLT, objc_object_reference);
- field_decl = get_identifier ("self");
- field_decl = build1 (INDIRECT_REF, NULLT, field_decl);
- field_decl = grokfield (input_filename, lineno, field_decl, decl_specs, NULLT);
- field_decl_chain = field_decl;
-
- /* struct objc_class *class; */
-
- decl_specs = get_identifier (_TAG_CLASS);
- decl_specs = build_tree_list (NULLT, xref_tag (RECORD_TYPE, decl_specs));
- field_decl = build1 (INDIRECT_REF, NULLT, get_identifier ("class"));
-
- field_decl = grokfield (input_filename, lineno, field_decl, decl_specs, NULLT);
- chainon (field_decl_chain, field_decl);
-
- finish_struct (record, field_decl_chain);
-
- /* `struct objc_super *' */
- super_type = groktypename (build_tree_list (build_tree_list (NULLT, record),
- build1 (INDIRECT_REF, NULLT, NULLT)));
- return record;
- }
-
- /*
- * struct objc_ivar {
- * char *ivar_name;
- * char *ivar_type;
- * int ivar_offset;
- * };
- */
- static tree
- build_ivar_template ()
- {
- tree objc_ivar_id, objc_ivar_record;
- tree decl_specs, field_decl, field_decl_chain;
-
- objc_ivar_id = get_identifier (_TAG_IVAR);
- objc_ivar_record = start_struct (RECORD_TYPE, objc_ivar_id);
-
- /* char *ivar_name; */
-
- decl_specs = build_tree_list (NULLT, ridpointers[(int) RID_CHAR]);
- field_decl = build1 (INDIRECT_REF, NULLT, get_identifier ("ivar_name"));
-
- field_decl = grokfield (input_filename, lineno, field_decl, decl_specs, NULLT);
- field_decl_chain = field_decl;
-
- /* char *ivar_type; */
-
- decl_specs = build_tree_list (NULLT, ridpointers[(int) RID_CHAR]);
- field_decl = build1 (INDIRECT_REF, NULLT, get_identifier ("ivar_type"));
-
- field_decl = grokfield (input_filename, lineno, field_decl, decl_specs, NULLT);
- chainon (field_decl_chain, field_decl);
-
- /* int ivar_offset; */
-
- decl_specs = build_tree_list (NULLT, ridpointers[(int) RID_INT]);
- field_decl = get_identifier ("ivar_offset");
-
- field_decl = grokfield (input_filename, lineno, field_decl, decl_specs, NULLT);
- chainon (field_decl_chain, field_decl);
-
- finish_struct (objc_ivar_record, field_decl_chain);
-
- return objc_ivar_record;
- }
-
- /*
- * struct {
- * int ivar_count;
- * struct objc_ivar ivar_list[ivar_count];
- * };
- */
- static tree
- build_ivar_list_template (list_type, size)
- tree list_type;
- int size;
- {
- tree objc_ivar_list_id, objc_ivar_list_record;
- tree decl_specs, field_decl, field_decl_chain;
-
- objc_ivar_list_record = start_struct (RECORD_TYPE, NULLT);
-
- /* int ivar_count; */
-
- decl_specs = build_tree_list (NULLT, ridpointers[(int) RID_INT]);
- field_decl = get_identifier ("ivar_count");
-
- field_decl = grokfield (input_filename, lineno, field_decl, decl_specs, NULLT);
- field_decl_chain = field_decl;
-
- /* struct objc_ivar ivar_list[]; */
-
- decl_specs = build_tree_list (NULLT, list_type);
- field_decl = build_nt (ARRAY_REF, get_identifier ("ivar_list"),
- build_int_2 (size, 0));
-
- field_decl = grokfield (input_filename, lineno, field_decl, decl_specs, NULLT);
- chainon (field_decl_chain, field_decl);
-
- finish_struct (objc_ivar_list_record, field_decl_chain);
-
- return objc_ivar_list_record;
- }
-
- /*
- * struct {
- * int method_next;
- * int method_count;
- * struct objc_method method_list[method_count];
- * };
- */
- static tree
- build_method_list_template (list_type, size)
- tree list_type;
- int size;
- {
- tree objc_ivar_list_id, objc_ivar_list_record;
- tree decl_specs, field_decl, field_decl_chain;
-
- objc_ivar_list_record = start_struct (RECORD_TYPE, NULLT);
-
- /* int method_next; */
-
- decl_specs = build_tree_list (NULLT, ridpointers[(int) RID_INT]);
- field_decl = get_identifier ("method_next");
-
- field_decl = grokfield (input_filename, lineno, field_decl, decl_specs, NULLT);
- field_decl_chain = field_decl;
-
- /* int method_count; */
-
- decl_specs = build_tree_list (NULLT, ridpointers[(int) RID_INT]);
- field_decl = get_identifier ("method_count");
-
- field_decl = grokfield (input_filename, lineno, field_decl, decl_specs, NULLT);
- chainon (field_decl_chain, field_decl);
-
- /* struct objc_method method_list[]; */
-
- decl_specs = build_tree_list (NULLT, list_type);
- field_decl = build_nt (ARRAY_REF, get_identifier ("method_list"),
- build_int_2 (size, 0));
-
- field_decl = grokfield (input_filename, lineno, field_decl, decl_specs, NULLT);
- chainon (field_decl_chain, field_decl);
-
- finish_struct (objc_ivar_list_record, field_decl_chain);
-
- return objc_ivar_list_record;
- }
-
- static tree
- build_ivar_list_initializer (field_decl, size)
- tree field_decl;
- int *size;
- {
- tree initlist = NULLT;
-
- do
- {
- int offset;
-
- /* set name */
- if (DECL_NAME (field_decl))
- {
- offset = add_objc_string (DECL_NAME (field_decl));
- initlist = tree_cons (NULLT, build_msg_pool_reference (offset), initlist);
- }
- else
- {
- /* unnamed bit-field ivar (yuck). */
- initlist = tree_cons (NULLT, build_int_2 (0, 0), initlist);
- }
-
- /* set type */
- encode_field_decl (field_decl, OBJC_ENCODE_DONT_INLINE_DEFS);
- offset = add_objc_string (get_identifier (obstack_finish (&util_obstack)));
- obstack_free (&util_obstack, util_firstobj);
-
- initlist = tree_cons (NULLT, build_msg_pool_reference (offset), initlist);
-
- /* set offset */
- initlist = tree_cons (NULLT,
- build_int_2 (TREE_INT_CST_LOW (DECL_FIELD_BITPOS (field_decl)) / BITS_PER_UNIT, 0),
-
- initlist);
- (*size)++;
- field_decl = TREE_CHAIN (field_decl);
- }
- while (field_decl);
-
- return build_nt (CONSTRUCTOR, NULLT, nreverse (initlist));
- }
-
- static tree
- generate_ivars_list (type, name, size, list)
- tree type;
- char *name;
- int size;
- tree list;
- {
- tree sc_spec, decl_specs, decl, initlist;
-
- sc_spec = tree_cons (NULLT, ridpointers[(int) RID_STATIC], NULLT);
- decl_specs = tree_cons (NULLT, type, sc_spec);
-
- decl = start_decl (synth_id_with_class_suffix (name), decl_specs, 1);
-
- initlist = build_tree_list (NULLT, build_int_2 (size, 0));
- initlist = tree_cons (NULLT, list, initlist);
-
- finish_decl (decl, build_nt (CONSTRUCTOR, NULLT, nreverse (initlist)), NULLT);
-
- return decl;
- }
-
- static void
- generate_ivar_lists ()
- {
- tree initlist, ivar_list_template, chain;
- tree cast, variable_length_type;
- int size;
-
- if (!objc_ivar_template)
- objc_ivar_template = build_ivar_template ();
-
- cast = build_tree_list (build_tree_list (NULLT, xref_tag (RECORD_TYPE,
- get_identifier (_TAG_IVAR_LIST))), NULLT);
- variable_length_type = groktypename (cast);
-
- /* only generate class variables for the root of the inheritance
- hierarchy since these will be the same for every class */
-
- if (CLASS_SUPER_NAME (implementation_template) == NULLT
- && (chain = TYPE_FIELDS (objc_class_template)))
- {
- size = 0;
- initlist = build_ivar_list_initializer (chain, &size);
-
- ivar_list_template = build_ivar_list_template (objc_ivar_template, size);
-
- _OBJC_CLASS_VARIABLES_decl =
- generate_ivars_list (ivar_list_template, "_OBJC_CLASS_VARIABLES",
- size, initlist);
- /* cast! */
- TREE_TYPE (_OBJC_CLASS_VARIABLES_decl) = variable_length_type;
- }
- else
- _OBJC_CLASS_VARIABLES_decl = 0;
-
- chain = CLASS_IVARS (implementation_template);
- if (chain)
- {
- size = 0;
- initlist = build_ivar_list_initializer (chain, &size);
-
- ivar_list_template = build_ivar_list_template (objc_ivar_template, size);
-
- _OBJC_INSTANCE_VARIABLES_decl =
- generate_ivars_list (ivar_list_template, "_OBJC_INSTANCE_VARIABLES",
- size, initlist);
- /* cast! */
- TREE_TYPE (_OBJC_INSTANCE_VARIABLES_decl) = variable_length_type;
- }
- else
- _OBJC_INSTANCE_VARIABLES_decl = 0;
- }
-
- static tree
- build_dispatch_table_initializer (entries, size)
- tree entries;
- int *size;
- {
- tree initlist = NULLT;
-
- do
- {
- int offset = add_objc_string (METHOD_SEL_NAME (entries));
-
- initlist = tree_cons (NULLT, init_selector (offset), initlist);
-
- offset = add_objc_string (METHOD_ENCODING (entries));
- initlist = tree_cons (NULLT, build_msg_pool_reference (offset), initlist);
-
- initlist = tree_cons (NULLT, METHOD_DEFINITION (entries), initlist);
-
- (*size)++;
- entries = TREE_CHAIN (entries);
- }
- while (entries);
-
- return build_nt (CONSTRUCTOR, NULLT, nreverse (initlist));
- }
-
- /*
- * To accomplish method prototyping without generating all kinds of
- * inane warnings, the definition of the dispatch table entries were
- * changed from:
- *
- * struct objc_method { SEL _cmd; id (*_imp)(); };
- * to:
- * struct objc_method { SEL _cmd; void *_imp; };
- */
- static tree
- build_method_template ()
- {
- tree _SLT_record;
- tree decl_specs, field_decl, field_decl_chain, parms;
-
- _SLT_record = start_struct (RECORD_TYPE, get_identifier (_TAG_METHOD));
-
- #ifdef OBJC_INT_SELECTORS
- /* unsigned int _cmd; */
- decl_specs = tree_cons (NULLT, ridpointers[(int) RID_UNSIGNED], NULLT);
- decl_specs = tree_cons (NULLT, ridpointers[(int) RID_INT], decl_specs);
- field_decl = get_identifier ("_cmd");
- #else /* not OBJC_INT_SELECTORS */
- /* struct objc_selector *_cmd; */
- decl_specs = tree_cons (NULLT,
- xref_tag (RECORD_TYPE,
- get_identifier (TAG_SELECTOR)),
- NULLT);
- field_decl = build1 (INDIRECT_REF, NULLT, get_identifier ("_cmd"));
- #endif /* not OBJC_INT_SELECTORS */
-
- field_decl = grokfield (input_filename, lineno, field_decl, decl_specs, NULLT);
- field_decl_chain = field_decl;
-
- decl_specs = tree_cons (NULLT, ridpointers[(int) RID_CHAR], NULLT);
- field_decl = build1 (INDIRECT_REF, NULLT, get_identifier ("method_types"));
- field_decl = grokfield (input_filename, lineno, field_decl, decl_specs, NULLT);
- chainon (field_decl_chain, field_decl);
-
- /* void *_imp; */
-
- decl_specs = tree_cons (NULLT, ridpointers[(int) RID_VOID], NULLT);
- field_decl = build1 (INDIRECT_REF, NULLT, get_identifier ("_imp"));
- field_decl = grokfield (input_filename, lineno, field_decl, decl_specs, NULLT);
- chainon (field_decl_chain, field_decl);
-
- finish_struct (_SLT_record, field_decl_chain);
-
- return _SLT_record;
- }
-
-
- static tree
- generate_dispatch_table (type, name, size, list)
- tree type;
- char *name;
- int size;
- tree list;
- {
- tree sc_spec, decl_specs, decl, initlist;
-
- sc_spec = tree_cons (NULLT, ridpointers[(int) RID_STATIC], NULLT);
- decl_specs = tree_cons (NULLT, type, sc_spec);
-
- decl = start_decl (synth_id_with_class_suffix (name), decl_specs, 1);
-
- initlist = build_tree_list (NULLT, build_int_2 (0, 0));
- initlist = tree_cons (NULLT, build_int_2 (size, 0), initlist);
- initlist = tree_cons (NULLT, list, initlist);
-
- finish_decl (decl, build_nt (CONSTRUCTOR, NULLT, nreverse (initlist)), NULLT);
-
- return decl;
- }
-
- static void
- generate_dispatch_tables ()
- {
- tree initlist, chain, method_list_template;
- tree cast, variable_length_type;
- int size;
-
- if (!objc_method_template)
- objc_method_template = build_method_template ();
-
- cast = build_tree_list (build_tree_list (NULLT, xref_tag (RECORD_TYPE,
- get_identifier (_TAG_METHOD_LIST))), NULLT);
- variable_length_type = groktypename (cast);
-
- chain = CLASS_CLS_METHODS (implementation_context);
- if (chain)
- {
- size = 0;
- initlist = build_dispatch_table_initializer (chain, &size);
-
- method_list_template = build_method_list_template (objc_method_template,
- size);
- if (TREE_CODE (implementation_context) == IMPLEMENTATION_TYPE)
- _OBJC_CLASS_METHODS_decl =
- generate_dispatch_table (method_list_template,
- "_OBJC_CLASS_METHODS",
- size, initlist);
- else
- /* we have a category */
- _OBJC_CLASS_METHODS_decl =
- generate_dispatch_table (method_list_template,
- "_OBJC_CATEGORY_CLASS_METHODS",
- size, initlist);
- /* cast! */
- TREE_TYPE (_OBJC_CLASS_METHODS_decl) = variable_length_type;
- }
- else
- _OBJC_CLASS_METHODS_decl = 0;
-
- chain = CLASS_NST_METHODS (implementation_context);
- if (chain)
- {
- size = 0;
- initlist = build_dispatch_table_initializer (chain, &size);
-
- method_list_template = build_method_list_template (objc_method_template,
- size);
- if (TREE_CODE (implementation_context) == IMPLEMENTATION_TYPE)
- _OBJC_INSTANCE_METHODS_decl =
- generate_dispatch_table (method_list_template,
- "_OBJC_INSTANCE_METHODS",
- size, initlist);
- else
- /* we have a category */
- _OBJC_INSTANCE_METHODS_decl =
- generate_dispatch_table (method_list_template,
- "_OBJC_CATEGORY_INSTANCE_METHODS",
- size, initlist);
- /* cast! */
- TREE_TYPE (_OBJC_INSTANCE_METHODS_decl) = variable_length_type;
- }
- else
- _OBJC_INSTANCE_METHODS_decl = 0;
- }
-
- static tree
- build_category_initializer (cat_name, class_name,
- instance_methods, class_methods)
- tree cat_name;
- tree class_name;
- tree instance_methods;
- tree class_methods;
- {
- tree initlist = NULLT, expr;
-
- initlist = tree_cons (NULLT, cat_name, initlist);
- initlist = tree_cons (NULLT, class_name, initlist);
-
- if (!instance_methods)
- initlist = tree_cons (NULLT, build_int_2 (0, 0), initlist);
- else
- {
- expr = build_unary_op (ADDR_EXPR, instance_methods, 0);
- initlist = tree_cons (NULLT, expr, initlist);
- }
- if (!class_methods)
- initlist = tree_cons (NULLT, build_int_2 (0, 0), initlist);
- else
- {
- expr = build_unary_op (ADDR_EXPR, class_methods, 0);
- initlist = tree_cons (NULLT, expr, initlist);
- }
- return build_nt (CONSTRUCTOR, NULLT, nreverse (initlist));
- }
-
- /*
- * struct objc_class {
- * struct objc_class *isa;
- * struct objc_class *super_class;
- * char *name;
- * long version;
- * long info;
- * long instance_size;
- * struct objc_ivar_list *ivars;
- * struct objc_method_list *methods;
- * struct objc_cache *cache;
- * };
- */
- static tree
- build_shared_structure_initializer (isa, super, name, size, status,
- dispatch_table, ivar_list)
- tree isa;
- tree super;
- tree name;
- tree size;
- int status;
- tree dispatch_table;
- tree ivar_list;
- {
- tree initlist = NULLT, expr;
-
- /* isa = */
- initlist = tree_cons (NULLT, isa, initlist);
-
- /* super_class = */
- initlist = tree_cons (NULLT, super, initlist);
-
- /* name = */
- initlist = tree_cons (NULLT, name, initlist);
-
- /* version = */
- initlist = tree_cons (NULLT, build_int_2 (0, 0), initlist);
-
- /* info = */
- initlist = tree_cons (NULLT, build_int_2 (status, 0), initlist);
-
- /* instance_size = */
- initlist = tree_cons (NULLT, size, initlist);
-
- /* objc_ivar_list = */
- if (!ivar_list)
- initlist = tree_cons (NULLT, build_int_2 (0, 0), initlist);
- else
- {
- expr = build_unary_op (ADDR_EXPR, ivar_list, 0);
- initlist = tree_cons (NULLT, expr, initlist);
- }
-
- /* objc_method_list = */
- if (!dispatch_table)
- initlist = tree_cons (NULLT, build_int_2 (0, 0), initlist);
- else
- {
- expr = build_unary_op (ADDR_EXPR, dispatch_table, 0);
- initlist = tree_cons (NULLT, expr, initlist);
- }
-
- /* method_cache = */
- initlist = tree_cons (NULLT, build_int_2 (0, 0), initlist);
-
- return build_nt (CONSTRUCTOR, NULLT, nreverse (initlist));
- }
-
- /*
- * static struct objc_category _OBJC_CATEGORY_<name> = { ... };
- */
- static void
- generate_category (cat)
- tree cat;
- {
- tree sc_spec, decl_specs, decl;
- tree initlist, cat_name_expr, class_name_expr;
- int offset;
-
- sc_spec = tree_cons (NULLT, ridpointers[(int) RID_STATIC], NULLT);
- decl_specs = tree_cons (NULLT, objc_category_template, sc_spec);
-
- decl = start_decl (synth_id_with_class_suffix ("_OBJC_CATEGORY"),
- decl_specs, 1);
-
- offset = add_objc_string (CLASS_SUPER_NAME (cat));
- cat_name_expr = build_msg_pool_reference (offset);
-
- offset = add_objc_string (CLASS_NAME (cat));
- class_name_expr = build_msg_pool_reference (offset);
-
- initlist = build_category_initializer (
- cat_name_expr, class_name_expr,
- _OBJC_INSTANCE_METHODS_decl, _OBJC_CLASS_METHODS_decl);
-
- finish_decl (decl, initlist, NULLT);
- }
-
- /*
- * static struct objc_class _OBJC_METACLASS_Foo={ ... };
- * static struct objc_class _OBJC_CLASS_Foo={ ... };
- */
- static void
- generate_shared_structures ()
- {
- tree sc_spec, decl_specs, expr_decl, decl;
- tree name_expr, super_expr, root_expr;
- tree my_root_id = NULLT, my_super_id = NULLT;
- tree cast_type, initlist;
- int offset;
-
- my_super_id = CLASS_SUPER_NAME (implementation_template);
- if (my_super_id)
- {
- add_class_reference (my_super_id);
-
- /* compute "my_root_id" - this is required for code generation.
- * the "isa" for all meta class structures points to the root of
- * the inheritance hierarchy (e.g. "__Object")...
- */
- my_root_id = my_super_id;
- do
- {
- tree my_root_int = lookup_interface (my_root_id);
-
- if (my_root_int && CLASS_SUPER_NAME (my_root_int))
- my_root_id = CLASS_SUPER_NAME (my_root_int);
- else
- break;
- }
- while (1);
- }
- else /* no super class */
- {
- my_root_id = CLASS_NAME (implementation_template);
- }
-
- cast_type = groktypename (build_tree_list (build_tree_list (NULLT,
- objc_class_template), build1 (INDIRECT_REF, NULLT, NULLT)));
-
- offset = add_objc_string (CLASS_NAME (implementation_template));
- name_expr = build_msg_pool_reference (offset);
-
- /* install class `isa' and `super' pointers at runtime */
- if (my_super_id)
- {
- offset = add_objc_string (my_super_id);
- super_expr = build_msg_pool_reference (offset);
- TREE_TYPE (super_expr) = cast_type; /* cast! */
- }
- else
- super_expr = build_int_2 (0, 0);
-
- offset = add_objc_string (my_root_id);
- root_expr = build_msg_pool_reference (offset);
- TREE_TYPE (root_expr) = cast_type; /* cast! */
-
- /* static struct objc_class _OBJC_METACLASS_Foo = { ... }; */
-
- sc_spec = build_tree_list (NULLT, ridpointers[(int) RID_STATIC]);
- decl_specs = tree_cons (NULLT, objc_class_template, sc_spec);
-
- decl = start_decl (DECL_NAME (_OBJC_METACLASS_decl), decl_specs, 1);
-
- initlist = build_shared_structure_initializer (
- root_expr, super_expr, name_expr,
- build_int_2 (TREE_INT_CST_LOW (TYPE_SIZE (objc_class_template)) / BITS_PER_UNIT, 0),
- 2 /*CLS_META*/,
- _OBJC_CLASS_METHODS_decl, _OBJC_CLASS_VARIABLES_decl);
-
- finish_decl (decl, initlist, NULLT);
-
- /* static struct objc_class _OBJC_CLASS_Foo={ ... }; */
-
- decl = start_decl (DECL_NAME (_OBJC_CLASS_decl), decl_specs, 1);
-
- initlist = build_shared_structure_initializer (
- build_unary_op (ADDR_EXPR, _OBJC_METACLASS_decl, 0),
- super_expr, name_expr,
- build_int_2 (TREE_INT_CST_LOW (TYPE_SIZE (CLASS_STATIC_TEMPLATE (implementation_template))) / BITS_PER_UNIT, 0),
- 1 /*CLS_FACTORY*/,
- _OBJC_INSTANCE_METHODS_decl, _OBJC_INSTANCE_VARIABLES_decl);
-
- finish_decl (decl, initlist, NULLT);
- }
-
- static tree
- synth_id_with_class_suffix (preamble)
- char *preamble;
- {
- char *string;
- if (TREE_CODE (implementation_context) == IMPLEMENTATION_TYPE)
- {
- string = (char *) alloca (strlen (preamble)
- + strlen (IDENTIFIER_POINTER (CLASS_NAME (implementation_context)))
- + 3);
- sprintf (string, "%s_%s", preamble,
- IDENTIFIER_POINTER (CLASS_NAME (implementation_context)));
- }
- else
- {
- /* we have a category */
- string = (char *) alloca (strlen (preamble)
- + strlen (IDENTIFIER_POINTER (CLASS_NAME (implementation_context)))
- + strlen (IDENTIFIER_POINTER (CLASS_SUPER_NAME (implementation_context)))
- + 3);
- sprintf (string, "%s_%s_%s", preamble,
- IDENTIFIER_POINTER (CLASS_NAME (implementation_context)),
- IDENTIFIER_POINTER (CLASS_SUPER_NAME (implementation_context)));
- }
- return get_identifier (string);
- }
-
- /*
- * usage:
- * keyworddecl:
- * selector ':' '(' typename ')' identifier
- *
- * purpose:
- * transform an Objective-C keyword argument into
- * the C equivalent parameter declarator.
- *
- * in: key_name, an "identifier_node" (optional).
- * arg_type, a "tree_list" (optional).
- * arg_name, an "identifier_node".
- *
- * note: it would be really nice to strongly type the preceding
- * arguments in the function prototype; however, then i
- * could not use the "accessor" macros defined in "tree.h".
- *
- * out: an instance of "keyword_decl".
- *
- */
-
- tree
- build_keyword_decl (key_name, arg_type, arg_name)
- tree key_name;
- tree arg_type;
- tree arg_name;
- {
- tree keyword_decl;
-
- /* if no type is specified, default to "id" */
- if (arg_type == NULLT)
- arg_type = build_tree_list (build_tree_list (NULLT, objc_object_reference),
- build1 (INDIRECT_REF, NULLT, NULLT));
-
- keyword_decl = make_node (KEYWORD_DECL);
-
- TREE_TYPE (keyword_decl) = arg_type;
- KEYWORD_ARG_NAME (keyword_decl) = arg_name;
- KEYWORD_KEY_NAME (keyword_decl) = key_name;
-
- return keyword_decl;
- }
-
- /*
- * given a chain of keyword_decl's, synthesize the full keyword selector.
- */
- static tree
- build_keyword_selector (selector)
- tree selector;
- {
- int len = 0;
- tree key_chain, key_name;
- char *buf;
-
- for (key_chain = selector; key_chain; key_chain = TREE_CHAIN (key_chain))
- {
- if (TREE_CODE (selector) == KEYWORD_DECL)
- key_name = KEYWORD_KEY_NAME (key_chain);
- else if (TREE_CODE (selector) == TREE_LIST)
- key_name = TREE_PURPOSE (key_chain);
-
- if (key_name)
- len += IDENTIFIER_LENGTH (key_name) + 1;
- else /* just a ':' arg */
- len++;
- }
- buf = (char *)alloca (len + 1);
- bzero (buf, len + 1);
-
- for (key_chain = selector; key_chain; key_chain = TREE_CHAIN (key_chain))
- {
- if (TREE_CODE (selector) == KEYWORD_DECL)
- key_name = KEYWORD_KEY_NAME (key_chain);
- else if (TREE_CODE (selector) == TREE_LIST)
- key_name = TREE_PURPOSE (key_chain);
-
- if (key_name)
- strcat (buf, IDENTIFIER_POINTER (key_name));
- strcat (buf, ":");
- }
- return get_identifier (buf);
- }
-
- /* used for declarations and definitions */
-
- tree
- build_method_decl (code, ret_type, selector, add_args)
- enum tree_code code;
- tree ret_type;
- tree selector;
- tree add_args;
- {
- tree method_decl;
-
- /* if no type is specified, default to "id" */
- if (ret_type == NULLT)
- ret_type = build_tree_list (build_tree_list (NULLT, objc_object_reference),
- build1 (INDIRECT_REF, NULLT, NULLT));
-
- method_decl = make_node (code);
- TREE_TYPE (method_decl) = ret_type;
-
- /*
- * if we have a keyword selector, create an identifier_node that
- * represents the full selector name (`:' included)...
- */
- if (TREE_CODE (selector) == KEYWORD_DECL)
- {
- METHOD_SEL_NAME (method_decl) = build_keyword_selector (selector);
- METHOD_SEL_ARGS (method_decl) = selector;
- METHOD_ADD_ARGS (method_decl) = add_args;
- }
- else
- {
- METHOD_SEL_NAME (method_decl) = selector;
- METHOD_SEL_ARGS (method_decl) = NULLT;
- METHOD_ADD_ARGS (method_decl) = NULLT;
- }
-
- return method_decl;
- }
-
- #define METHOD_DEF 0
- #define METHOD_REF 1
- /* Used by `build_message_expr' and `comp_method_types'.
- Return an argument list for method METH.
- CONTEXT is either METHOD_DEF or METHOD_REF,
- saying whether we are trying to define a method or call one.
- SUPERFLAG says this is for a send to super;
- this makes a difference for the NeXT calling sequence
- in which the lookup and the method call are done together. */
-
- static tree
- get_arg_type_list (meth, context, superflag)
- tree meth;
- int context;
- int superflag;
- {
- tree arglist, akey;
-
- #ifdef NEXT_OBJC_RUNTIME
- /* receiver type */
- if (superflag)
- {
- arglist = build_tree_list (NULLT, super_type);
- }
- else
- #endif
- {
- if (context == METHOD_DEF)
- arglist = build_tree_list (NULLT, TREE_TYPE (self_decl));
- else
- arglist = build_tree_list (NULLT, id_type);
- }
-
- /* selector type - will eventually change to `int' */
- chainon (arglist, build_tree_list (NULLT, selector_type));
-
- /* build a list of argument types */
- for (akey = METHOD_SEL_ARGS (meth); akey; akey = TREE_CHAIN (akey))
- {
- tree arg_decl = groktypename_in_parm_context (TREE_TYPE (akey));
- chainon (arglist, build_tree_list (NULLT, TREE_TYPE (arg_decl)));
- }
-
- if (METHOD_ADD_ARGS (meth) == (tree)1)
- /*
- * we have a `, ...' immediately following the selector,
- * finalize the arglist...simulate get_parm_info (0)
- */
- ;
- else if (METHOD_ADD_ARGS (meth))
- {
- /* we have a variable length selector */
- tree add_arg_list = TREE_CHAIN (METHOD_ADD_ARGS (meth));
- chainon (arglist, add_arg_list);
- }
- else /* finalize the arglist...simulate get_parm_info (1) */
- chainon (arglist, build_tree_list (NULLT, void_type_node));
-
- return arglist;
- }
-
- static tree
- check_duplicates (hsh)
- hash hsh;
- {
- tree meth = NULLT;
-
- if (hsh)
- {
- meth = hsh->key;
-
- if (hsh->list)
- {
- /* we have two methods with the same name and different types */
- attr loop;
- char type;
-
- type = (TREE_CODE (meth) == INSTANCE_METHOD_DECL) ? '-' : '+';
-
- warning ("multiple declarations for method `%s'",
- IDENTIFIER_POINTER (METHOD_SEL_NAME (meth)));
-
- warn_with_method ("using", type, meth);
- for (loop = hsh->list; loop; loop = loop->next)
- warn_with_method ("also found", type, loop->value);
- }
- }
- return meth;
- }
-
- static tree
- receiver_is_class_object (receiver)
- tree receiver;
- {
- /* the receiver is a function call that returns an id...
- * ...check if it is a call to objc_getClass, if so, give it
- * special treatment.
- */
- tree exp = TREE_OPERAND (receiver, 0);
-
- if (exp != 0 && (TREE_CODE (exp) == ADDR_EXPR))
- {
- exp = TREE_OPERAND (exp, 0);
- if (exp != 0
- && TREE_CODE (exp) == FUNCTION_DECL && exp == objc_getClass_decl)
- {
- /* we have a call to objc_getClass! */
- tree arg = TREE_OPERAND (receiver, 1);
-
- if (arg != 0
- && TREE_CODE (arg) == TREE_LIST
- && (arg = TREE_VALUE (arg))
- && TREE_CODE (arg) == NOP_EXPR
- && (arg = TREE_OPERAND (arg, 0))
- && TREE_CODE (arg) == ADDR_EXPR
- && (arg = TREE_OPERAND (arg, 0))
- && TREE_CODE (arg) == STRING_CST)
- /* finally, we have the class name */
- return get_identifier (TREE_STRING_POINTER (arg));
- }
- }
- return 0;
- }
-
- /* If we are currently building a message expr, this holds
- the identifier of the selector of the message. This is
- used when printing warnings about argument mismatches. */
-
- static tree building_objc_message_expr = 0;
-
- tree
- maybe_building_objc_message_expr ()
- {
- return building_objc_message_expr;
- }
-
- /* Construct an expression for sending a message.
- MESS has the object to send to in TREE_PURPOSE
- and the argument list (including selector) in TREE_VALUE. */
-
- tree
- build_message_expr (mess)
- tree mess;
- {
- tree receiver = TREE_PURPOSE (mess);
- tree selector, self_object;
- tree rtype, sel_name;
- tree args = TREE_VALUE (mess);
- tree method_params = NULLT;
- tree method_prototype = NULLT;
- int selTransTbl_index;
- tree retval;
- int statically_typed = 0, statically_allocated = 0;
- tree class_ident = 0;
-
- /* 1 if this is sending to the superclass. */
- int super;
-
- if (!doing_objc_thang)
- fatal ("Objective-C text in C source file");
-
- if (TREE_CODE (receiver) == ERROR_MARK)
- return error_mark_node;
-
- /* determine receiver type */
- rtype = TREE_TYPE (receiver);
- super = (TREE_TYPE (receiver) == super_type);
-
- if (! super)
- {
- if (TREE_STATIC_TEMPLATE (rtype))
- statically_allocated = 1;
- else if (TREE_CODE (rtype) == POINTER_TYPE
- && TREE_STATIC_TEMPLATE (TREE_TYPE (rtype)))
- statically_typed = 1;
- /* classfix -smn */
- else if (TREE_CODE (receiver) == CALL_EXPR && rtype == id_type
- && (class_ident = receiver_is_class_object (receiver)))
- ;
- else if (TYPE_MAIN_VARIANT (rtype) != TYPE_MAIN_VARIANT (id_type)
- && TYPE_MAIN_VARIANT (rtype) != TYPE_MAIN_VARIANT (class_type))
- {
- bzero (errbuf, BUFSIZE);
- warning ("invalid receiver type `%s'", gen_declaration (rtype, errbuf));
- }
- if (statically_allocated)
- receiver = build_unary_op (ADDR_EXPR, receiver, 0);
-
- /* Don't evaluate the receiver twice. */
- receiver = save_expr (receiver);
- self_object = receiver;
- }
- else
- /* If sending to `super', use current self as the object. */
- self_object = self_decl;
-
- /* Obtain the full selector name. */
-
- if (TREE_CODE (args) == IDENTIFIER_NODE)
- /* a unary selector */
- sel_name = args;
- else if (TREE_CODE (args) == TREE_LIST)
- sel_name = build_keyword_selector (args);
-
- selTransTbl_index = add_selector_reference (sel_name);
-
- /* Build the parameters list for looking up the method.
- These are the object itself and the selector. */
-
- #ifndef OBJC_SELECTORS_WITHOUT_LABELS
- selector = build_selector_reference (selTransTbl_index);
- #else
- selector = build_array_ref (_OBJC_SELECTOR_REFERENCES_decl,
- build_int_2 (selTransTbl_index, 0));
- #endif
-
- /* Build the parameter list to give to the method. */
-
- method_params = NULLT;
- if (TREE_CODE (args) == TREE_LIST)
- {
- tree chain = args, prev = NULLT;
-
- /* We have a keyword selector--check for comma expressions. */
- while (chain)
- {
- tree element = TREE_VALUE (chain);
-
- /* We have a comma expression, must collapse... */
- if (TREE_CODE (element) == TREE_LIST)
- {
- if (prev)
- TREE_CHAIN (prev) = element;
- else
- args = element;
- }
- prev = chain;
- chain = TREE_CHAIN (chain);
- }
- method_params = args;
- }
-
- /* Determine operation return type. */
-
- if (super_type != 0
- && TYPE_MAIN_VARIANT (rtype) == TYPE_MAIN_VARIANT (super_type))
- {
- tree iface;
-
- if (CLASS_SUPER_NAME (implementation_template))
- {
- iface = lookup_interface (CLASS_SUPER_NAME (implementation_template));
-
- if (TREE_CODE (method_context) == INSTANCE_METHOD_DECL)
- method_prototype = lookup_instance_method_static (iface, sel_name);
- else
- method_prototype = lookup_class_method_static (iface, sel_name);
-
- if (iface && !method_prototype)
- warning ("`%s' does not respond to `%s'",
- IDENTIFIER_POINTER (CLASS_SUPER_NAME (implementation_template)),
- IDENTIFIER_POINTER (sel_name));
- }
- else
- {
- error ("no super class declared in interface for `%s'",
- IDENTIFIER_POINTER (CLASS_NAME (implementation_template)));
- return error_mark_node;
- }
-
- }
- else if (statically_allocated)
- {
- tree iface = lookup_interface (TYPE_NAME (rtype));
-
- if (iface && !(method_prototype = lookup_instance_method_static (iface, sel_name)))
- warning ("`%s' does not respond to `%s'",
- IDENTIFIER_POINTER (TYPE_NAME (rtype)),
- IDENTIFIER_POINTER (sel_name));
- }
- else if (statically_typed)
- {
- tree ctype = TREE_TYPE (rtype);
-
- /* `self' is now statically_typed...all methods should be visible
- * within the context of the implementation...
- */
- if (implementation_context
- && CLASS_NAME (implementation_context) == TYPE_NAME (ctype))
- {
- method_prototype = lookup_instance_method_static (implementation_template, sel_name);
-
- if (!method_prototype && implementation_template != implementation_context)
- /* the method is not published in the interface...check locally */
- method_prototype = lookup_method (CLASS_NST_METHODS (implementation_context),
- sel_name);
- }
- else
- {
- tree iface;
-
- if (iface = lookup_interface (TYPE_NAME (ctype)))
- method_prototype = lookup_instance_method_static (iface, sel_name);
- }
-
- if (!method_prototype)
- warning ("`%s' does not respond to `%s'",
- IDENTIFIER_POINTER (TYPE_NAME (ctype)),
- IDENTIFIER_POINTER (sel_name));
- }
- else if (class_ident)
- {
- if (implementation_context
- && CLASS_NAME (implementation_context) == class_ident)
- {
- method_prototype
- = lookup_class_method_static (implementation_template, sel_name);
-
- if (!method_prototype
- && implementation_template != implementation_context)
- /* the method is not published in the interface...check locally */
- method_prototype
- = lookup_method (CLASS_CLS_METHODS (implementation_context),
- sel_name);
- }
- else
- {
- tree iface;
-
- if (iface = lookup_interface (class_ident))
- method_prototype = lookup_class_method_static (iface, sel_name);
- }
-
- if (!method_prototype)
- {
- warning ("cannot find class (factory) method.");
- warning ("return type for `%s' defaults to id",
- IDENTIFIER_POINTER (sel_name));
- }
- }
- else
- {
- hash hsh;
-
- /* we think we have an instance...loophole: extern id Object; */
- hsh = hash_lookup (nst_method_hash_list, sel_name);
- if (!hsh)
- /* for various loopholes...like sending messages to self in a
- factory context... */
- hsh = hash_lookup (cls_method_hash_list, sel_name);
-
- method_prototype = check_duplicates (hsh);
- if (!method_prototype)
- {
- warning ("cannot find method.");
- warning ("return type for `%s' defaults to id",
- IDENTIFIER_POINTER (sel_name));
- }
- }
-
- /* Save the selector name for printing error messages. */
- building_objc_message_expr = sel_name;
-
- retval = build_objc_method_call (super, method_prototype,
- receiver, self_object,
- selector, method_params);
-
- building_objc_message_expr = 0;
-
- return retval;
- }
-
- /* Build a tree expression to send OBJECT the operation SELECTOR,
- looking up the method on object LOOKUP_OBJECT (often same as OBJECT),
- assuming the method has prototype METHOD_PROTOTYPE.
- (That is an INSTANCE_METHOD_DECL or CLASS_METHOD_DECL.)
- Use METHOD_PARAMS as list of args to pass to the method.
- If SUPER_FLAG is nonzero, we look up the superclass's method. */
-
- static tree
- build_objc_method_call (super_flag, method_prototype, lookup_object, object,
- selector, method_params)
- int super_flag;
- tree method_prototype, lookup_object, object, selector, method_params;
- {
- tree sender = (super_flag ? _msgSuper_decl : _msg_decl);
-
- #ifdef NEXT_OBJC_RUNTIME
- if (!method_prototype)
- {
- method_params = tree_cons (NULLT, lookup_object,
- tree_cons (NULLT, selector, method_params));
- return build_function_call (sender, method_params);
- }
- else
- {
- /* This is a real kludge, but it is used only for the Next.
- Clobber the data type of SENDER temporarily to accept
- all the arguments for this operation, and to return
- whatever this operation returns. */
- tree arglist = NULLT;
- tree retval;
-
- /* Save the proper contents of SENDER's data type. */
- tree savarg = TYPE_ARG_TYPES (TREE_TYPE (sender));
- tree savret = TREE_TYPE (TREE_TYPE (sender));
-
- /* Install this method's argument types. */
- arglist = get_arg_type_list (method_prototype, METHOD_REF, super_flag);
- TYPE_ARG_TYPES (TREE_TYPE (sender)) = arglist;
-
- /* Install this method's return type. */
- TREE_TYPE (TREE_TYPE (sender))
- = groktypename (TREE_TYPE (method_prototype));
-
- /* Call SENDER with all the parameters.
- This will do type checking using the arg types for this method. */
- method_params = tree_cons (NULLT, lookup_object,
- tree_cons (NULLT, selector, method_params));
- retval = build_function_call (sender, method_params);
-
- /* Restore SENDER's return/argument types. */
- TYPE_ARG_TYPES (TREE_TYPE (sender)) = savarg;
- TREE_TYPE (TREE_TYPE (sender)) = savret;
- return retval;
- }
- #else /* not NEXT_OBJC_RUNTIME */
- /* This is the portable way.
- First call the lookup function to get a pointer to the method,
- then cast the pointer, then call it with the method arguments. */
- tree method;
-
- /* Avoid trouble since we may evaluate each of these twice. */
- object = save_expr (object);
- selector = save_expr (selector);
-
- method
- = build_function_call (sender,
- tree_cons (NULLT, lookup_object,
- tree_cons (NULLT, selector, NULLT)));
-
- /* If we have a method prototype, construct the data type this method needs,
- and cast what we got from SENDER into a pointer to that type. */
- if (method_prototype)
- {
- tree arglist = get_arg_type_list (method_prototype, METHOD_REF, super_flag);
- tree valtype = groktypename (TREE_TYPE (method_prototype));
- tree fake_function_type = build_function_type (valtype, arglist);
- TREE_TYPE (method) = build_pointer_type (fake_function_type);
- }
- else
- {
- TREE_TYPE (method)
- = build_pointer_type (build_function_type (ptr_type_node, NULLT));
- }
- /* Pass the object to the method. */
- return build_function_call (method,
- tree_cons (NULLT, object,
- tree_cons (NULLT, selector,
- method_params)));
- #endif /* not NEXT_OBJC_RUNTIME */
- }
-
- tree
- build_selector_expr (selnamelist)
- tree selnamelist;
- {
- tree selname;
- int selTransTbl_index;
-
- if (!doing_objc_thang)
- fatal ("Objective-C text in C source file");
-
- /* obtain the full selector name */
- if (TREE_CODE (selnamelist) == IDENTIFIER_NODE)
- /* a unary selector */
- selname = selnamelist;
- else if (TREE_CODE (selnamelist) == TREE_LIST)
- selname = build_keyword_selector (selnamelist);
-
- selTransTbl_index = add_selector_reference (selname);
-
- #ifndef OBJC_SELECTORS_WITHOUT_LABELS
- return build_selector_reference (selTransTbl_index);
- #else
- /* synthesize a reference into the selector translation table */
- return build_array_ref (_OBJC_SELECTOR_REFERENCES_decl,
- build_int_2 (selTransTbl_index, 0));
- #endif
- }
-
- tree
- build_encode_expr (type)
- tree type;
- {
- tree result;
- char *string;
-
- if (!doing_objc_thang)
- fatal ("Objective-C text in C source file");
-
- encode_type (type, OBJC_ENCODE_INLINE_DEFS);
- obstack_1grow (&util_obstack, 0); /* null terminate string */
- string = obstack_finish (&util_obstack);
-
- /* synthesize a string that represents the encoded struct/union */
- result = my_build_string (strlen (string) + 1, string);
- obstack_free (&util_obstack, util_firstobj);
- return result;
- }
-
- tree
- build_ivar_reference (id)
- tree id;
- {
- if (TREE_CODE (method_context) == CLASS_METHOD_DECL)
- TREE_TYPE (self_decl) = instance_type; /* cast */
-
- return build_component_ref (build_indirect_ref (self_decl, "->"), id);
- }
-
- #define HASH_ALLOC_LIST_SIZE 170
- #define ATTR_ALLOC_LIST_SIZE 170
- #define SIZEHASHTABLE 257
- #define HASHFUNCTION(key) ((int)key >> 2) /* divide by 4 */
-
- static void
- hash_init ()
- {
- nst_method_hash_list = (hash *)xmalloc (SIZEHASHTABLE * sizeof (hash));
- cls_method_hash_list = (hash *)xmalloc (SIZEHASHTABLE * sizeof (hash));
-
- if (!nst_method_hash_list || !cls_method_hash_list)
- perror ("unable to allocate space in objc-tree.c");
- else
- {
- int i;
-
- for (i = 0; i < SIZEHASHTABLE; i++)
- {
- nst_method_hash_list[i] = 0;
- cls_method_hash_list[i] = 0;
- }
- }
- }
-
- static void
- hash_enter (hashlist, method)
- hash *hashlist;
- tree method;
- {
- static hash hash_alloc_list = 0;
- static int hash_alloc_index = 0;
- hash obj;
- int slot = HASHFUNCTION (METHOD_SEL_NAME (method)) % SIZEHASHTABLE;
-
- if (!hash_alloc_list || hash_alloc_index >= HASH_ALLOC_LIST_SIZE)
- {
- hash_alloc_index = 0;
- hash_alloc_list = (hash)xmalloc (sizeof (struct hashedEntry) *
- HASH_ALLOC_LIST_SIZE);
- if (!hash_alloc_list)
- perror ("unable to allocate in objc-tree.c");
- }
- obj = &hash_alloc_list[hash_alloc_index++];
- obj->list = 0;
- obj->next = hashlist[slot];
- obj->key = method;
-
- hashlist[slot] = obj; /* append to front */
- }
-
- static hash
- hash_lookup (hashlist, sel_name)
- hash *hashlist;
- tree sel_name;
- {
- hash target;
-
- target = hashlist[HASHFUNCTION (sel_name) % SIZEHASHTABLE];
-
- while (target)
- {
- if (sel_name == METHOD_SEL_NAME (target->key))
- return target;
-
- target = target->next;
- }
- return 0;
- }
-
- static void
- hash_add_attr (entry, value)
- hash entry;
- tree value;
- {
- static attr attr_alloc_list = 0;
- static int attr_alloc_index = 0;
- attr obj;
-
- if (!attr_alloc_list || attr_alloc_index >= ATTR_ALLOC_LIST_SIZE)
- {
- attr_alloc_index = 0;
- attr_alloc_list = (attr)xmalloc (sizeof (struct hashedAttribute) *
- ATTR_ALLOC_LIST_SIZE);
- if (!attr_alloc_list)
- perror ("unable to allocate in objc-tree.c");
- }
- obj = &attr_alloc_list[attr_alloc_index++];
- obj->next = entry->list;
- obj->value = value;
-
- entry->list = obj; /* append to front */
- }
-
- static tree
- lookup_method (mchain, method)
- tree mchain;
- tree method;
- {
- tree key;
-
- if (TREE_CODE (method) == IDENTIFIER_NODE)
- key = method;
- else
- key = METHOD_SEL_NAME (method);
-
- while (mchain)
- {
- if (METHOD_SEL_NAME (mchain) == key)
- return mchain;
- mchain = TREE_CHAIN (mchain);
- }
- return NULLT;
- }
-
- static tree
- lookup_instance_method_static (interface, ident)
- tree interface;
- tree ident;
- {
- tree inter = interface;
- tree chain = CLASS_NST_METHODS (inter);
- tree meth = NULLT;
-
- do
- {
- if (meth = lookup_method (chain, ident))
- return meth;
-
- if (CLASS_CATEGORY_LIST (inter))
- {
- tree category = CLASS_CATEGORY_LIST (inter);
- chain = CLASS_NST_METHODS (category);
-
- do
- {
- if (meth = lookup_method (chain, ident))
- return meth;
-
- if (category = CLASS_CATEGORY_LIST (category))
- chain = CLASS_NST_METHODS (category);
- }
- while (category);
- }
-
- if (inter = lookup_interface (CLASS_SUPER_NAME (inter)))
- chain = CLASS_NST_METHODS (inter);
- }
- while (inter);
-
- return meth;
- }
-
- static tree
- lookup_class_method_static (interface, ident)
- tree interface;
- tree ident;
- {
- tree inter = interface;
- tree chain = CLASS_CLS_METHODS (inter);
- tree meth = NULLT;
-
- do
- {
- if (meth = lookup_method (chain, ident))
- return meth;
-
- if (CLASS_CATEGORY_LIST (inter))
- {
- tree category = CLASS_CATEGORY_LIST (inter);
- chain = CLASS_CLS_METHODS (category);
-
- do
- {
- if (meth = lookup_method (chain, ident))
- return meth;
-
- if (category = CLASS_CATEGORY_LIST (category))
- chain = CLASS_CLS_METHODS (category);
- }
- while (category);
- }
-
- if (inter = lookup_interface (CLASS_SUPER_NAME (inter)))
- chain = CLASS_CLS_METHODS (inter);
- }
- while (inter);
-
- return meth;
- }
-
- tree
- add_class_method (class, method)
- tree class;
- tree method;
- {
- tree mth;
- hash hsh;
-
- if (!(mth = lookup_method (CLASS_CLS_METHODS (class), method)))
- {
- /* put method on list in reverse order */
- TREE_CHAIN (method) = CLASS_CLS_METHODS (class);
- CLASS_CLS_METHODS (class) = method;
- }
- else
- {
- if (TREE_CODE (class) == IMPLEMENTATION_TYPE)
- error ("duplicate definition of class method `%s'.",
- IDENTIFIER_POINTER (METHOD_SEL_NAME (mth)));
- else
- {
- /* check types, if different complain */
- if (!comp_proto_with_proto (method, mth))
- error ("duplicate declaration of class method `%s'.",
- IDENTIFIER_POINTER (METHOD_SEL_NAME (mth)));
- }
- }
-
- if (!(hsh = hash_lookup (cls_method_hash_list, METHOD_SEL_NAME (method))))
- {
- /* install on a global chain */
- hash_enter (cls_method_hash_list, method);
- }
- else
- {
- /* check types, if different add to a list */
- if (!comp_proto_with_proto (method, hsh->key))
- hash_add_attr (hsh, method);
- }
- return method;
- }
-
- tree
- add_instance_method (class, method)
- tree class;
- tree method;
- {
- tree mth;
- hash hsh;
-
- if (!(mth = lookup_method (CLASS_NST_METHODS (class), method)))
- {
- /* put method on list in reverse order */
- TREE_CHAIN (method) = CLASS_NST_METHODS (class);
- CLASS_NST_METHODS (class) = method;
- }
- else
- {
- if (TREE_CODE (class) == IMPLEMENTATION_TYPE)
- error ("duplicate definition of instance method `%s'.",
- IDENTIFIER_POINTER (METHOD_SEL_NAME (mth)));
- else
- {
- /* check types, if different complain */
- if (!comp_proto_with_proto (method, mth))
- error ("duplicate declaration of instance method `%s'.",
- IDENTIFIER_POINTER (METHOD_SEL_NAME (mth)));
- }
- }
-
- if (!(hsh = hash_lookup (nst_method_hash_list, METHOD_SEL_NAME (method))))
- {
- /* install on a global chain */
- hash_enter (nst_method_hash_list, method);
- }
- else
- {
- /* check types, if different add to a list */
- if (!comp_proto_with_proto (method, hsh->key))
- hash_add_attr (hsh, method);
- }
- return method;
- }
-
- static tree
- add_class (class)
- tree class;
- {
- /* put interfaces on list in reverse order */
- TREE_CHAIN (class) = interface_chain;
- interface_chain = class;
- return interface_chain;
- }
-
- static void
- add_category (class, category)
- tree class;
- tree category;
- {
- /* put categories on list in reverse order */
- CLASS_CATEGORY_LIST (category) = CLASS_CATEGORY_LIST (class);
- CLASS_CATEGORY_LIST (class) = category;
- }
-
- /* called after parsing each instance variable declaration. Necessary to
- * preserve typedefs and implement public/private...
- */
- tree
- add_instance_variable (class, public, declarator, declspecs, width)
- tree class;
- int public;
- tree declarator;
- tree declspecs;
- tree width;
- {
- tree field_decl, raw_decl;
-
- raw_decl = build_tree_list (declspecs /*purpose*/, declarator/*value*/);
-
- if (CLASS_RAW_IVARS (class))
- chainon (CLASS_RAW_IVARS (class), raw_decl);
- else
- CLASS_RAW_IVARS (class) = raw_decl;
-
- field_decl = grokfield (input_filename, lineno,
- declarator, declspecs, width);
-
- /* overload the public attribute, it is not used for FIELD_DECL's */
- if (public)
- TREE_PUBLIC (field_decl) = 1;
-
- if (CLASS_IVARS (class))
- chainon (CLASS_IVARS (class), field_decl);
- else
- CLASS_IVARS (class) = field_decl;
-
- return class;
- }
-
- tree
- is_ivar (decl_chain, ident)
- tree decl_chain;
- tree ident;
- {
- for ( ; decl_chain; decl_chain = TREE_CHAIN (decl_chain))
- if (DECL_NAME (decl_chain) == ident)
- return decl_chain;
- return NULL_TREE;
- }
-
- /* we have an instance variable reference, check to see if it is public...*/
-
- int
- is_public (expr, identifier)
- tree expr;
- tree identifier;
- {
- tree basetype = TREE_TYPE (expr);
- enum tree_code code = TREE_CODE (basetype);
- tree decl;
-
- if (code == RECORD_TYPE)
- {
- if (TREE_STATIC_TEMPLATE (basetype))
- {
- if (decl = is_ivar (TYPE_FIELDS (basetype), identifier))
- {
- /* important difference between the Stepstone translator:
-
- all instance variables should be public within the context
- of the implementation...
- */
- if (implementation_context)
- {
- if ((TREE_CODE (implementation_context) == IMPLEMENTATION_TYPE
- && CLASS_NAME (implementation_context) == TYPE_NAME (basetype))
- || (TREE_CODE (implementation_context) == CATEGORY_TYPE
- && CLASS_NAME (implementation_context) == TYPE_NAME (basetype)))
- return 1;
- }
-
- if (TREE_PUBLIC (decl))
- return 1;
-
- error ("instance variable `%s' is declared private",
- IDENTIFIER_POINTER (identifier));
- return 0;
- }
- }
- else if (implementation_context && (basetype == objc_object_reference))
- {
- TREE_TYPE (expr) = _PRIVATE_record;
- if (extra_warnings)
- {
- warning ("static access to object of type `id'");
- warning ("please change to type `%s *'",
- IDENTIFIER_POINTER (CLASS_NAME (implementation_context)));
- }
- }
- }
- return 1;
- }
-
- /* implement @defs (<classname>) within struct bodies. */
-
- tree
- get_class_ivars (interface)
- tree interface;
- {
- if (!doing_objc_thang)
- fatal ("Objective-C text in C source file");
-
- return build_ivar_chain (interface);
- }
-
- tree
- get_class_reference (interface)
- tree interface;
- {
- tree params;
-
- add_class_reference (CLASS_NAME (interface));
-
- params = build_tree_list (NULLT,
- my_build_string (IDENTIFIER_LENGTH (CLASS_NAME (interface)) + 1,
- IDENTIFIER_POINTER (CLASS_NAME (interface))));
-
- return build_function_call (objc_getClass_decl, params);
- }
-
- /* make sure all entries in "chain" are also in "list" */
-
- static void
- check_methods (chain, list, mtype)
- tree chain;
- tree list;
- int mtype;
- {
- int first = 1;
-
- while (chain)
- {
- if (!lookup_method (list, chain))
- {
- if (first)
- {
- if (TREE_CODE (implementation_context) == IMPLEMENTATION_TYPE)
- warning ("incomplete implementation of class `%s'",
- IDENTIFIER_POINTER (CLASS_NAME (implementation_context)));
- else if (TREE_CODE (implementation_context) == CATEGORY_TYPE)
- warning ("incomplete implementation of category `%s'",
- IDENTIFIER_POINTER (CLASS_SUPER_NAME (implementation_context)));
- first = 0;
- }
- warning ("method definition for `%c%s' not found",
- mtype, IDENTIFIER_POINTER (METHOD_SEL_NAME (chain)));
- }
- chain = TREE_CHAIN (chain);
- }
- }
-
- /* Make sure that the class CLASS_NAME is defined
- CODE says which kind of thing CLASS_NAME ought to be.
- It can be INTERFACE_TYPE, IMPLEMENTATION_TYPE, PROTOCOL_TYPE
- or CATEGORY_TYPE.
-
- If CODE is INTERFACE_TYPE, we also do a push_obstacks_nochange
- whose matching pop is in continue_class. */
-
- tree
- start_class (code, class_name, super_name)
- enum tree_code code;
- tree class_name;
- tree super_name;
- {
- tree class;
-
- if (code == INTERFACE_TYPE)
- {
- push_obstacks_nochange ();
- end_temporary_allocation ();
- }
-
- if (!doing_objc_thang)
- fatal ("Objective-C text in C source file");
-
- class = make_node (code);
-
- CLASS_NAME (class) = class_name;
- CLASS_SUPER_NAME (class) = super_name;
- CLASS_CLS_METHODS (class) = NULL_TREE;
-
- if (code == IMPLEMENTATION_TYPE)
- {
- /* pre-build the following entities - for speed/convenience. */
- if (!self_id)
- self_id = get_identifier ("self");
- if (!_cmd_id)
- _cmd_id = get_identifier ("_cmd");
-
- if (!objc_super_template)
- objc_super_template = build_super_template ();
-
- method_slot = 0; /* reset for multiple classes per file */
-
- implementation_context = class;
-
- /* lookup the interface for this implementation. */
-
- if (!(implementation_template = lookup_interface (class_name)))
- {
- warning ("Cannot find interface declaration for `%s'",
- IDENTIFIER_POINTER (class_name));
- add_class (implementation_template = implementation_context);
- }
-
- /* if a super class has been specified in the implementation,
- insure it conforms to the one specified in the interface */
-
- if (super_name
- && (super_name != CLASS_SUPER_NAME (implementation_template)))
- {
- error ("conflicting super class name `%s'",
- IDENTIFIER_POINTER (super_name));
- error ("previous declaration of `%s'",
- IDENTIFIER_POINTER (CLASS_SUPER_NAME (implementation_template)));
- }
- }
- else if (code == INTERFACE_TYPE)
- {
- if (lookup_interface (class_name))
- warning ("duplicate interface declaration for class `%s'",
- IDENTIFIER_POINTER (class_name));
- else
- add_class (class);
- }
- else if (code == PROTOCOL_TYPE)
- {
- tree class_category_is_assoc_with;
-
- /* for a category, class_name is really the name of the class that
- the following set of methods will be associated with...we must
- find the interface so that can derive the objects template */
-
- if (!(class_category_is_assoc_with = lookup_interface (class_name)))
- {
- error ("Cannot find interface declaration for `%s'",
- IDENTIFIER_POINTER (class_name));
- exit (1);
- }
- else
- add_category (class_category_is_assoc_with, class);
- }
- else if (code == CATEGORY_TYPE)
- {
- /* pre-build the following entities - for speed/convenience. */
- if (!self_id)
- self_id = get_identifier ("self");
- if (!_cmd_id)
- _cmd_id = get_identifier ("_cmd");
-
- if (!objc_super_template)
- objc_super_template = build_super_template ();
-
- method_slot = 0; /* reset for multiple classes per file */
-
- implementation_context = class;
-
- /* for a category, class_name is really the name of the class that
- the following set of methods will be associated with...we must
- find the interface so that can derive the objects template */
-
- if (!(implementation_template = lookup_interface (class_name)))
- {
- error ("Cannot find interface declaration for `%s'",
- IDENTIFIER_POINTER (class_name));
- exit (1);
- }
- }
- return class;
- }
-
- tree
- continue_class (class)
- tree class;
- {
- if (TREE_CODE (class) == IMPLEMENTATION_TYPE
- || TREE_CODE (class) == CATEGORY_TYPE)
- {
- struct imp_entry *impEntry;
- tree ivar_context;
-
- /* check consistency of the instance variables. */
-
- if (CLASS_IVARS (class))
- check_ivars (implementation_template, class);
-
- /* code generation */
-
- ivar_context = build_private_template (implementation_template);
-
- if (!objc_class_template)
- build_class_template ();
-
- if (!(impEntry = (struct imp_entry *)xmalloc (sizeof (struct imp_entry))))
- perror ("unable to allocate in objc-tree.c");
-
- impEntry->next = imp_list;
- impEntry->imp_context = class;
- impEntry->imp_template = implementation_template;
-
- synth_forward_declarations ();
- impEntry->class_decl = _OBJC_CLASS_decl;
- impEntry->meta_decl = _OBJC_METACLASS_decl;
-
- /* append to front and increment count */
- imp_list = impEntry;
- if (TREE_CODE (class) == IMPLEMENTATION_TYPE)
- imp_count++;
- else
- cat_count++;
-
- return ivar_context;
- }
- else if (TREE_CODE (class) == INTERFACE_TYPE)
- {
- tree record = xref_tag (RECORD_TYPE, CLASS_NAME (class));
-
- if (!TYPE_FIELDS (record))
- {
- finish_struct (record, build_ivar_chain (class));
- CLASS_STATIC_TEMPLATE (class) = record;
-
- /* mark this record as a class template - for static typing */
- TREE_STATIC_TEMPLATE (record) = 1;
- }
- return NULLT;
- }
- else
- return error_mark_node;
- }
-
- /*
- * this is called once we see the "@end" in an interface/implementation.
- */
- void
- finish_class (class)
- tree class;
- {
- if (TREE_CODE (class) == IMPLEMENTATION_TYPE)
- {
- /* all code generation is done in finish_objc */
-
- if (implementation_template != implementation_context)
- {
- /* ensure that all method listed in the interface contain bodies! */
- check_methods (CLASS_CLS_METHODS (implementation_template),
- CLASS_CLS_METHODS (implementation_context), '+');
- check_methods (CLASS_NST_METHODS (implementation_template),
- CLASS_NST_METHODS (implementation_context), '-');
- }
- }
- else if (TREE_CODE (class) == CATEGORY_TYPE)
- {
- tree category = CLASS_CATEGORY_LIST (implementation_template);
-
- /* find the category interface from the class it is associated with */
- while (category)
- {
- if (CLASS_SUPER_NAME (class) == CLASS_SUPER_NAME (category))
- break;
- category = CLASS_CATEGORY_LIST (category);
- }
-
- if (category)
- {
- /* ensure that all method listed in the interface contain bodies! */
- check_methods (CLASS_CLS_METHODS (category),
- CLASS_CLS_METHODS (implementation_context), '+');
- check_methods (CLASS_NST_METHODS (category),
- CLASS_NST_METHODS (implementation_context), '-');
- }
- }
- else if (TREE_CODE (class) == INTERFACE_TYPE)
- {
- tree decl_specs;
- char *string = (char *) alloca (strlen (IDENTIFIER_POINTER (CLASS_NAME (class))) + 3);
-
- /* extern struct objc_object *_<my_name>; */
-
- sprintf (string, "_%s", IDENTIFIER_POINTER (CLASS_NAME (class)));
-
- decl_specs = build_tree_list (NULLT, ridpointers[(int) RID_EXTERN]);
- decl_specs = tree_cons (NULLT, objc_object_reference, decl_specs);
- define_decl (build1 (INDIRECT_REF, NULLT, get_identifier (string)),
- decl_specs);
- }
- }
-
- /* "Encode" a data type into a string, whichg rows in util_obstack.
- ??? What is the FORMAT? Someone please document this! */
-
- /* Encode a pointer type. */
-
- static void
- encode_pointer (type, format)
- tree type;
- int format;
- {
- tree pointer_to = TREE_TYPE (type);
-
- if (TREE_CODE (pointer_to) == RECORD_TYPE)
- {
- if (TYPE_NAME (pointer_to)
- && TREE_CODE (TYPE_NAME (pointer_to)) == IDENTIFIER_NODE)
- {
- char *name = IDENTIFIER_POINTER (TYPE_NAME (pointer_to));
-
- if ((strcmp (name, TAG_OBJECT) == 0) /* '@' */
- || TREE_STATIC_TEMPLATE (pointer_to))
- {
- obstack_1grow (&util_obstack, '@');
- return;
- }
- else if (strcmp (name, TAG_CLASS) == 0) /* '#' */
- {
- obstack_1grow (&util_obstack, '#');
- return;
- }
- #ifndef OBJC_INT_SELECTORS
- else if (strcmp (name, TAG_SELECTOR) == 0) /* ':' */
- {
- obstack_1grow (&util_obstack, ':');
- return;
- }
- #endif /* OBJC_INT_SELECTORS */
- }
- }
- else if (TREE_CODE (pointer_to) == INTEGER_TYPE
- && TYPE_MODE (pointer_to) == QImode)
- {
- obstack_1grow (&util_obstack, '*');
- return;
- }
-
- /* we have a type that does not get special treatment... */
-
- /* NeXT extension */
- obstack_1grow (&util_obstack, '^');
- encode_type (pointer_to, format);
- }
-
- static void
- encode_array (type, format)
- tree type;
- int format;
- {
- tree anIntCst = TYPE_SIZE (type);
- tree array_of = TREE_TYPE (type);
- char buffer[40];
-
- /* An incomplete array is treated like a pointer. */
- if (anIntCst == NULL)
- {
- /* split for obvious reasons. North-Keys 30 Mar 1991 */
- encode_pointer (type, format);
- return;
- }
-
- sprintf (buffer, "[%d",
- TREE_INT_CST_LOW (anIntCst)
- / TREE_INT_CST_LOW (TYPE_SIZE (array_of)));
- obstack_grow (&util_obstack, buffer, strlen (buffer));
- encode_type (array_of, format);
- obstack_1grow (&util_obstack, ']');
- return;
- }
-
- static void
- encode_aggregate (type, format)
- tree type;
- int format;
- {
- enum tree_code code = TREE_CODE (type);
-
- switch (code)
- {
- case RECORD_TYPE:
- {
- int have_pointer = 0;
-
- if (obstack_object_size (&util_obstack) > 0
- && *(obstack_next_free (&util_obstack)-1) == '^')
- have_pointer = 1;
-
- obstack_1grow (&util_obstack, '{');
- if (TYPE_NAME (type))
- {
- if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE)
- {
- obstack_grow (&util_obstack,
- IDENTIFIER_POINTER (TYPE_NAME (type)),
- strlen (IDENTIFIER_POINTER (TYPE_NAME (type))));
- }
- else /* we have an untagged structure or a typedef */
- {
- obstack_1grow (&util_obstack, '?');
- }
- }
-
- if (have_pointer
- || format == OBJC_ENCODE_DONT_INLINE_DEFS)
- {
- /* we have a pointer
- or we don't want the details. */
- obstack_1grow (&util_obstack, '}');
- }
- else
- {
- tree fields = TYPE_FIELDS (type);
- obstack_1grow (&util_obstack, '=');
- for ( ; fields; fields = TREE_CHAIN (fields))
- encode_field_decl (fields, format);
- obstack_1grow (&util_obstack, '}');
- }
- break;
- }
-
- case UNION_TYPE:
- {
- int have_pointer = 0;
-
- if (obstack_object_size (&util_obstack) > 0
- && *(obstack_next_free (&util_obstack)-1) == '^')
- have_pointer = 1;
-
- obstack_1grow (&util_obstack, '(');
- if (have_pointer && TYPE_NAME (type))
- {
- if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE)
- {
- obstack_grow (&util_obstack,
- IDENTIFIER_POINTER (TYPE_NAME (type)),
- strlen (IDENTIFIER_POINTER (TYPE_NAME (type))));
- }
- else /* we have an untagged structure or a typedef */
- {
- obstack_1grow (&util_obstack, '?');
- }
- }
-
- if (have_pointer
- || format == OBJC_ENCODE_DONT_INLINE_DEFS)
- {
- /* we have a pointer
- or we don't want the details. */
- obstack_1grow (&util_obstack, ')');
- }
- else
- {
- tree fields = TYPE_FIELDS (type);
- for ( ; fields; fields = TREE_CHAIN (fields))
- encode_field_decl (fields, format);
- obstack_1grow (&util_obstack, ')');
- }
- break;
- }
-
-
- case ENUMERAL_TYPE:
- obstack_1grow (&util_obstack, 'i');
- break;
- }
- }
-
- /*
- * support bitfields, the current version of Objective-C does not support
- * them. the string will consist of one or more "b:n"'s where n is an
- * integer describing the width of the bitfield. Currently, classes in
- * the kit implement a method "-(char *)describeBitfieldStruct:" that
- * simulates this...if they do not implement this method, the archiver
- * assumes the bitfield is 16 bits wide (padded if necessary) and packed
- * according to the GNU compiler. After looking at the "kit", it appears
- * that all classes currently rely on this default behavior, rather than
- * hand generating this string (which is tedious).
- */
- static void
- encode_bitfield (width, format)
- int width;
- int format;
- {
- char buffer[40];
- sprintf (buffer, "b%d", width);
- obstack_grow (&util_obstack, buffer, strlen (buffer));
- }
-
- /*
- * format will be:
- *
- * OBJC_ENCODE_INLINE_DEFS or OBJC_ENCODE_DONT_INLINE_DEFS
- */
- static void
- encode_type (type, format)
- tree type;
- int format;
- {
- enum tree_code code = TREE_CODE (type);
-
- if (code == INTEGER_TYPE)
- {
- if (TREE_INT_CST_LOW (TYPE_MIN_VALUE (type)) == 0)
- {
- /* unsigned integer types */
-
- if (TYPE_MODE (type) == QImode) /* 'C' */
- obstack_1grow (&util_obstack, 'C');
- else if (TYPE_MODE (type) == HImode) /* 'S' */
- obstack_1grow (&util_obstack, 'S');
- else if (TYPE_MODE (type) == SImode)
- {
- if (type == long_unsigned_type_node)
- obstack_1grow (&util_obstack, 'L'); /* 'L' */
- else
- obstack_1grow (&util_obstack, 'I'); /* 'I' */
- }
- }
- else /* signed integer types */
- {
- if (TYPE_MODE (type) == QImode) /* 'c' */
- obstack_1grow (&util_obstack, 'c');
- else if (TYPE_MODE (type) == HImode) /* 's' */
- obstack_1grow (&util_obstack, 's');
- else if (TYPE_MODE (type) == SImode) /* 'i' */
- {
- if (type == long_integer_type_node)
- obstack_1grow (&util_obstack, 'l'); /* 'l' */
- else
- obstack_1grow (&util_obstack, 'i'); /* 'i' */
- }
- }
- }
- else if (code == REAL_TYPE)
- {
- /* floating point types */
-
- if (TYPE_MODE (type) == SFmode) /* 'f' */
- obstack_1grow (&util_obstack, 'f');
- else if (TYPE_MODE (type) == DFmode
- || TYPE_MODE (type) == TFmode) /* 'd' */
- obstack_1grow (&util_obstack, 'd');
- }
-
- else if (code == VOID_TYPE) /* 'v' */
- obstack_1grow (&util_obstack, 'v');
-
- else if (code == ARRAY_TYPE)
- encode_array (type, format);
-
- else if (code == POINTER_TYPE)
- encode_pointer (type, format);
-
- else if (code == RECORD_TYPE || code == UNION_TYPE || code == ENUMERAL_TYPE)
- encode_aggregate (type, format);
-
- else if (code == FUNCTION_TYPE) /* '?' */
- obstack_1grow (&util_obstack, '?');
- }
-
- static void
- encode_field_decl (field_decl, format)
- tree field_decl;
- int format;
- {
- if (DECL_BIT_FIELD (field_decl))
- encode_bitfield (DECL_FIELD_SIZE (field_decl), format);
- else
- encode_type (TREE_TYPE (field_decl), format);
- }
-
- static tree
- expr_last (complex_expr)
- tree complex_expr;
- {
- tree next;
-
- if (complex_expr)
- while (next = TREE_OPERAND (complex_expr, 0))
- complex_expr = next;
- return complex_expr;
- }
-
- /* The selector of the current method,
- or NULL if we aren't compiling a method. */
-
- tree
- maybe_objc_method_name (decl)
- tree decl;
- {
- if (method_context)
- return METHOD_SEL_NAME (method_context);
- else
- return 0;
- }
-
- /*
- * Transform a method definition into a function definition as follows:
- *
- * - synthesize the first two arguments, "self" and "_cmd".
- */
-
- void
- start_method_def (method)
- tree method;
- {
- tree decl_specs;
-
- /* required to implement _msgSuper () */
- method_context = method;
- _OBJC_SUPER_decl = NULLT;
-
- pushlevel (0); /* must be called BEFORE "start_function ()" */
-
- /* generate prototype declarations for arguments..."new-style" */
-
- if (TREE_CODE (method_context) == INSTANCE_METHOD_DECL)
- decl_specs = build_tree_list (NULLT, _PRIVATE_record);
- else
- /* really a `struct objc_class *'...however we allow people to
- assign to self...which changes its type midstream.
- */
- decl_specs = build_tree_list (NULLT, objc_object_reference);
-
- push_parm_decl (build_tree_list (decl_specs,
- build1 (INDIRECT_REF, NULLT, self_id)));
-
- #ifdef OBJC_INT_SELECTORS
- decl_specs = build_tree_list (NULLT, ridpointers[(int) RID_UNSIGNED]);
- decl_specs = tree_cons (NULLT, ridpointers[(int) RID_INT], decl_specs);
- push_parm_decl (build_tree_list (decl_specs, _cmd_id));
- #else /* not OBJC_INT_SELECTORS */
- decl_specs = build_tree_list (NULLT,
- xref_tag (RECORD_TYPE,
- get_identifier (TAG_SELECTOR)));
- push_parm_decl (build_tree_list (decl_specs,
- build1 (INDIRECT_REF, NULLT, _cmd_id)));
- #endif /* not OBJC_INT_SELECTORS */
-
- /* generate argument declarations if a keyword_decl */
- if (METHOD_SEL_ARGS (method))
- {
- tree arglist = METHOD_SEL_ARGS (method);
- do
- {
- tree arg_spec = TREE_PURPOSE (TREE_TYPE (arglist));
- tree arg_decl = TREE_VALUE (TREE_TYPE (arglist));
-
- if (arg_decl)
- {
- tree last_expr = expr_last (arg_decl);
-
- /* unite the abstract decl with its name */
- TREE_OPERAND (last_expr, 0) = KEYWORD_ARG_NAME (arglist);
- push_parm_decl (build_tree_list (arg_spec, arg_decl));
- /* unhook...restore the abstract declarator */
- TREE_OPERAND (last_expr, 0) = NULLT;
- }
- else
- push_parm_decl (build_tree_list (arg_spec, KEYWORD_ARG_NAME (arglist)));
-
- arglist = TREE_CHAIN (arglist);
- }
- while (arglist);
- }
-
- if (METHOD_ADD_ARGS (method) > (tree)1)
- {
- /* we have a variable length selector - in "prototype" format */
- tree akey = TREE_PURPOSE (METHOD_ADD_ARGS (method));
- while (akey)
- {
- /* this must be done prior to calling pushdecl (). pushdecl () is
- * going to change our chain on us...
- */
- tree nextkey = TREE_CHAIN (akey);
- pushdecl (akey);
- akey = nextkey;
- }
- }
- }
-
- static void
- error_with_method (message, mtype, method)
- char *message;
- char mtype;
- tree method;
- {
- count_error (0);
- fprintf (stderr, "%s:%d: ",
- DECL_SOURCE_FILE (method), DECL_SOURCE_LINE (method));
- bzero (errbuf, BUFSIZE);
- fprintf (stderr, "%s `%c%s'\n", message, mtype, gen_method_decl (method, errbuf));
- }
-
- static void
- warn_with_method (message, mtype, method)
- char *message;
- char mtype;
- tree method;
- {
- count_error (1);
- fprintf (stderr, "%s:%d: ",
- DECL_SOURCE_FILE (method), DECL_SOURCE_LINE (method));
- bzero (errbuf, BUFSIZE);
- fprintf (stderr, "%s `%c%s'\n", message, mtype, gen_method_decl (method, errbuf));
- }
-
- /* return 1 if `method' is consistent with `proto' */
-
- static int
- comp_method_with_proto (method, proto)
- tree method, proto;
- {
- static tree function_type = 0;
-
- /* create a function_type node once */
- if (!function_type)
- {
- struct obstack *ambient_obstack = current_obstack;
-
- current_obstack = &permanent_obstack;
- function_type = make_node (FUNCTION_TYPE);
- current_obstack = ambient_obstack;
- }
-
- /* install argument types - normally set by "build_function_type ()". */
- TYPE_ARG_TYPES (function_type) = get_arg_type_list (proto, METHOD_DEF, 0);
-
- /* install return type */
- TREE_TYPE (function_type) = groktypename (TREE_TYPE (proto));
-
- return comptypes (TREE_TYPE (METHOD_DEFINITION (method)), function_type);
- }
-
- /* return 1 if `proto1' is consistent with `proto2' */
-
- static int
- comp_proto_with_proto (proto1, proto2)
- tree proto1, proto2;
- {
- static tree function_type1 = 0, function_type2 = 0;
-
- /* create a couple function_type node's once */
- if (!function_type1)
- {
- struct obstack *ambient_obstack = current_obstack;
-
- current_obstack = &permanent_obstack;
- function_type1 = make_node (FUNCTION_TYPE);
- function_type2 = make_node (FUNCTION_TYPE);
- current_obstack = ambient_obstack;
- }
-
- /* install argument types - normally set by "build_function_type ()". */
- TYPE_ARG_TYPES (function_type1) = get_arg_type_list (proto1, METHOD_REF, 0);
- TYPE_ARG_TYPES (function_type2) = get_arg_type_list (proto2, METHOD_REF, 0);
-
- /* install return type */
- TREE_TYPE (function_type1) = groktypename (TREE_TYPE (proto1));
- TREE_TYPE (function_type2) = groktypename (TREE_TYPE (proto2));
-
- return comptypes (function_type1, function_type2);
- }
-
- /*
- * - generate an identifier for the function. the format is "_n_cls",
- * where 1 <= n <= nMethods, and cls is the name the implementation we
- * are processing.
- * - install the return type from the method declaration.
- * - if we have a prototype, check for type consistency.
- */
- static void
- really_start_method (method, parmlist)
- tree method, parmlist;
- {
- tree sc_spec, ret_spec, ret_decl, decl_specs;
- tree method_decl, method_id;
- char *buf;
-
- /* synth the storage class & assemble the return type */
- sc_spec = tree_cons (NULLT, ridpointers[(int) RID_STATIC], NULLT);
- ret_spec = TREE_PURPOSE (TREE_TYPE (method));
- decl_specs = chainon (sc_spec, ret_spec);
-
- if (TREE_CODE (implementation_context) == IMPLEMENTATION_TYPE)
- {
- /* Make sure this is big enough for any plausible method label. */
- buf = (char *) alloca (50
- + strlen (IDENTIFIER_POINTER (METHOD_SEL_NAME (method)))
- + strlen (IDENTIFIER_POINTER (CLASS_NAME (implementation_context))));
- #ifdef OBJC_GEN_METHOD_LABEL
- OBJC_GEN_METHOD_LABEL (buf,
- TREE_CODE (method) == INSTANCE_METHOD_DECL,
- IDENTIFIER_POINTER (CLASS_NAME (implementation_context)),
- NULL,
- IDENTIFIER_POINTER (METHOD_SEL_NAME (method)));
- #else
- sprintf (buf, "_%d_%s", ++method_slot,
- IDENTIFIER_POINTER (CLASS_NAME (implementation_context)));
- #endif
- }
- else /* we have a category */
- {
- /* Make sure this is big enough for any plausible method label. */
- buf = (char *) alloca (50
- + strlen (IDENTIFIER_POINTER (METHOD_SEL_NAME (method)))
- + strlen (IDENTIFIER_POINTER (CLASS_SUPER_NAME (implementation_context)))
- + strlen (IDENTIFIER_POINTER (CLASS_NAME (implementation_context))));
- #ifdef OBJC_GEN_METHOD_LABEL
- OBJC_GEN_METHOD_LABEL (buf,
- TREE_CODE (method) == INSTANCE_METHOD_DECL,
- IDENTIFIER_POINTER (CLASS_NAME (implementation_context)),
- IDENTIFIER_POINTER (CLASS_SUPER_NAME (implementation_context)),
- IDENTIFIER_POINTER (METHOD_SEL_NAME (method)));
- #else
- sprintf (buf, "_%d_%s_%s", ++method_slot,
- IDENTIFIER_POINTER (CLASS_NAME (implementation_context)),
- IDENTIFIER_POINTER (CLASS_SUPER_NAME (implementation_context)));
- #endif
- }
-
- method_id = get_identifier (buf);
-
- method_decl = build_nt (CALL_EXPR, method_id, parmlist, NULLT);
-
- /* check the declarator portion of the return type for the method */
- if (ret_decl = TREE_VALUE (TREE_TYPE (method)))
- {
- /*
- * unite the complex decl (specified in the abstract decl) with the
- * function decl just synthesized...(int *), (int (*)()), (int (*)[]).
- */
- tree save_expr = expr_last (ret_decl);
-
- TREE_OPERAND (save_expr, 0) = method_decl;
- method_decl = ret_decl;
- /* fool the parser into thinking it is starting a function */
- start_function (decl_specs, method_decl, 0);
- /* unhook...this has the effect of restoring the abstract declarator */
- TREE_OPERAND (save_expr, 0) = NULLT;
- }
- else
- {
- TREE_VALUE (TREE_TYPE (method)) = method_decl;
- /* fool the parser into thinking it is starting a function */
- start_function (decl_specs, method_decl, 0);
- /* unhook...this has the effect of restoring the abstract declarator */
- TREE_VALUE (TREE_TYPE (method)) = NULLT;
- }
-
- METHOD_DEFINITION (method) = current_function_decl;
-
- /* check consistency...start_function (), pushdecl (), duplicate_decls (). */
-
- if (implementation_template != implementation_context)
- {
- tree chain, proto;
-
- if (TREE_CODE (method) == INSTANCE_METHOD_DECL)
- chain = CLASS_NST_METHODS (implementation_template);
- else
- chain = CLASS_CLS_METHODS (implementation_template);
-
- if (proto = lookup_method (chain, METHOD_SEL_NAME (method)))
- {
- if (!comp_method_with_proto (method, proto))
- {
- fprintf (stderr, "%s: In method `%s'\n", input_filename,
- IDENTIFIER_POINTER (METHOD_SEL_NAME (method)));
- if (TREE_CODE (method) == INSTANCE_METHOD_DECL)
- {
- error_with_method ("conflicting types for", '-', method);
- error_with_method ("previous declaration of", '-', proto);
- }
- else
- {
- error_with_method ("conflicting types for", '+', method);
- error_with_method ("previous declaration of", '+', proto);
- }
- }
- }
- }
- }
-
- /*
- * the following routine is always called...this "architecture" is to
- * accommodate "old-style" variable length selectors.
- *
- * - a:a b:b // prototype ; id c; id d; // old-style
- */
- void
- continue_method_def ()
- {
- tree parmlist;
-
- if (METHOD_ADD_ARGS (method_context) == (tree)1)
- /*
- * we have a `, ...' immediately following the selector.
- */
- parmlist = get_parm_info (0);
- else
- parmlist = get_parm_info (1); /* place a `void_at_end' */
-
- /* set self_decl from the first argument...this global is used by
- * build_ivar_reference ().build_indirect_ref ().
- */
- self_decl = TREE_PURPOSE (parmlist);
-
- poplevel (0, 0, 0); /* must be called BEFORE "start_function ()" */
-
- really_start_method (method_context, parmlist);
-
- store_parm_decls (); /* must be called AFTER "start_function ()" */
- }
-
- void
- add_objc_decls ()
- {
- if (!_OBJC_SUPER_decl)
- _OBJC_SUPER_decl = start_decl (get_identifier (_TAG_SUPER),
- build_tree_list (NULLT, objc_super_template), 0);
-
- /* this prevents `unused variable' warnings when compiling with `-Wall' */
- DECL_IN_SYSTEM_HEADER (_OBJC_SUPER_decl) = 1;
- }
-
- /*
- * _n_Method (id self, SEL sel, ...)
- * {
- * struct objc_super _S;
- *
- * _msgSuper ((_S.self = self, _S.class = _cls, &_S), ...);
- * }
- */
- tree
- get_super_receiver ()
- {
- if (method_context)
- {
- tree super_expr, super_expr_list;
-
- /* set receiver to self */
- super_expr = build_component_ref (_OBJC_SUPER_decl, self_id);
- super_expr = build_modify_expr (super_expr, NOP_EXPR, self_decl);
- super_expr_list = build_tree_list (NULLT, super_expr);
-
- /* set class to begin searching */
- super_expr = build_component_ref (_OBJC_SUPER_decl, get_identifier ("class"));
-
- if (TREE_CODE (implementation_context) == IMPLEMENTATION_TYPE)
- {
- /* [_cls, __cls]Super are "pre-built" in synth_foward_declarations () */
-
- if (TREE_CODE (method_context) == INSTANCE_METHOD_DECL)
- super_expr = build_modify_expr (super_expr, NOP_EXPR, _clsSuper_ref);
- else
- super_expr = build_modify_expr (super_expr, NOP_EXPR, __clsSuper_ref);
- }
- else /* we have a category... */
- {
- tree params, super_name = CLASS_SUPER_NAME (implementation_template);
- tree funcCall;
-
- if (!super_name) /* Barf if super used in a category of Object. */
- {
- error("no super class declared in interface for `%s'",
- IDENTIFIER_POINTER (CLASS_NAME (implementation_template)));
- return error_mark_node;
- }
-
- add_class_reference (super_name);
-
- params = build_tree_list (NULLT,
- my_build_string (IDENTIFIER_LENGTH (super_name) + 1,
- IDENTIFIER_POINTER (super_name)));
-
- if (TREE_CODE (method_context) == INSTANCE_METHOD_DECL)
- funcCall = build_function_call (objc_getClass_decl, params);
- else
- funcCall = build_function_call (objc_getMetaClass_decl, params);
-
- /* cast! */
- TREE_TYPE (funcCall) = TREE_TYPE (_clsSuper_ref);
- super_expr = build_modify_expr (super_expr, NOP_EXPR, funcCall);
- }
- chainon (super_expr_list, build_tree_list (NULL_TREE, super_expr));
-
- super_expr = build_unary_op (ADDR_EXPR, _OBJC_SUPER_decl, 0);
- chainon (super_expr_list, build_tree_list (NULL_TREE, super_expr));
-
- return build_compound_expr (super_expr_list);
- }
- else
- {
- error ("[super ...] must appear in a method context");
- return error_mark_node;
- }
- }
-
- static tree
- encode_method_def (func_decl)
- tree func_decl;
- {
- tree parms;
- int stack_size = 0;
- char buffer[40];
- tree result;
-
- /* return type */
- encode_type (TREE_TYPE (TREE_TYPE (func_decl)),
- OBJC_ENCODE_DONT_INLINE_DEFS);
- /* stack size */
- for (parms = DECL_ARGUMENTS (func_decl); parms;
- parms = TREE_CHAIN (parms))
- stack_size += TREE_INT_CST_LOW (TYPE_SIZE (DECL_ARG_TYPE (parms)))
- / BITS_PER_UNIT;
-
- sprintf (buffer, "%d", stack_size);
- obstack_grow (&util_obstack, buffer, strlen (buffer));
-
- /* argument types */
- for (parms = DECL_ARGUMENTS (func_decl); parms;
- parms = TREE_CHAIN (parms))
- {
- int offset_in_bytes;
-
- /* type */
- encode_type (TREE_TYPE (parms), OBJC_ENCODE_DONT_INLINE_DEFS);
-
- /* compute offset */
- if (GET_CODE (DECL_INCOMING_RTL (parms)) == MEM)
- {
- rtx addr = XEXP (DECL_INCOMING_RTL (parms), 0);
-
- /* ??? Here we assume that the parm address is indexed
- off the frame pointer or arg pointer.
- If that is not true, we produce meaningless results,
- but do not crash. */
- if (GET_CODE (addr) == PLUS
- && GET_CODE (XEXP (addr, 1)) == CONST_INT)
- offset_in_bytes = INTVAL (XEXP (addr, 1));
- else
- offset_in_bytes = 0;
-
- /* This is the case where the parm is passed as an int or double
- and it is converted to a char, short or float and stored back
- in the parmlist. In this case, describe the parm
- with the variable's declared type, and adjust the address
- if the least significant bytes (which we are using) are not
- the first ones. */
- #if BYTES_BIG_ENDIAN
- if (TREE_TYPE (parms) != DECL_ARG_TYPE (parms))
- offset_in_bytes += (GET_MODE_SIZE (TYPE_MODE (DECL_ARG_TYPE (parms)))
- - GET_MODE_SIZE (GET_MODE (DECL_RTL (parms))));
- #endif
- }
- else
- offset_in_bytes = 0;
-
- /* The "+ 4" is a total hack to account for the return pc and
- saved fp on the 68k. We should redefine this format! */
- sprintf (buffer, "%d", offset_in_bytes + 8);
- obstack_grow (&util_obstack, buffer, strlen (buffer));
- }
-
- result = get_identifier (obstack_finish (&util_obstack));
- obstack_free (&util_obstack, util_firstobj);
- return result;
- }
-
- void
- finish_method_def ()
- {
- METHOD_ENCODING (method_context) =
- encode_method_def (current_function_decl);
-
- finish_function (0);
-
- /* this must be done AFTER finish_function, since the optimizer may
- find "may be used before set" errors. */
- method_context = NULLT; /* required to implement _msgSuper () */
- }
-
- int
- lang_report_error_function (decl)
- tree decl;
- {
- if (method_context)
- {
- fprintf (stderr, "In method `%s'\n",
- IDENTIFIER_POINTER (METHOD_SEL_NAME (method_context)));
- return 1;
- }
- else
- return 0;
- }
-
- static int
- is_complex_decl (type)
- tree type;
- {
- return (TREE_CODE (type) == ARRAY_TYPE
- || TREE_CODE (type) == FUNCTION_TYPE
- || TREE_CODE (type) == POINTER_TYPE);
- }
-
-
- /* Code to convert a decl node into text for a declaration in C. */
-
- static char tmpbuf[256];
-
- static void
- adorn_decl (decl, str)
- tree decl;
- char *str;
- {
- enum tree_code code = TREE_CODE (decl);
-
- if (code == ARRAY_REF)
- {
- tree anIntCst = TREE_OPERAND (decl, 1);
-
- sprintf (str + strlen (str), "[%d]", TREE_INT_CST_LOW (anIntCst));
- }
- else if (code == ARRAY_TYPE)
- {
- tree anIntCst = TYPE_SIZE (decl);
- tree array_of = TREE_TYPE (decl);
-
- sprintf (str + strlen (str), "[%d]",
- TREE_INT_CST_LOW (anIntCst)/TREE_INT_CST_LOW (TYPE_SIZE (array_of)));
- }
- else if (code == CALL_EXPR)
- strcat (str, "()");
- else if (code == FUNCTION_TYPE)
- {
- tree chain = TYPE_ARG_TYPES (decl); /* a list of types */
- strcat (str, "(");
- while (chain && TREE_VALUE (chain) != void_type_node)
- {
- gen_declaration (TREE_VALUE (chain), str);
- chain = TREE_CHAIN (chain);
- if (chain && TREE_VALUE (chain) != void_type_node)
- strcat (str, ",");
- }
- strcat (str, ")");
- }
- else
- {
- strcpy (tmpbuf, "*"); strcat (tmpbuf, str);
- strcpy (str, tmpbuf);
- }
- }
-
- static char *
- gen_declarator (decl, buf, name)
- tree decl;
- char *buf;
- char *name;
- {
- if (decl)
- {
- enum tree_code code = TREE_CODE (decl);
- char *str;
- tree op;
- int wrap = 0;
-
- switch (code)
- {
- case ARRAY_REF: case INDIRECT_REF: case CALL_EXPR:
- {
- op = TREE_OPERAND (decl, 0);
-
- /* we have a pointer to a function or array...(*)(), (*)[] */
- if ((code == ARRAY_REF || code == CALL_EXPR) &&
- (op && TREE_CODE (op) == INDIRECT_REF))
- wrap = 1;
-
- str = gen_declarator (op, buf, name);
-
- if (wrap)
- {
- strcpy (tmpbuf, "("); strcat (tmpbuf, str); strcat (tmpbuf, ")");
- strcpy (str, tmpbuf);
- }
-
- adorn_decl (decl, str);
- break;
- }
- case ARRAY_TYPE: case FUNCTION_TYPE: case POINTER_TYPE:
- {
- str = strcpy (buf, name);
-
- /* this clause is done iteratively...rather than recursively */
- do
- {
- op = is_complex_decl (TREE_TYPE (decl))
- ? TREE_TYPE (decl)
- : NULLT;
-
- adorn_decl (decl, str);
-
- /* we have a pointer to a function or array...(*)(), (*)[] */
- if ((code == POINTER_TYPE) &&
- (op && (TREE_CODE (op) == FUNCTION_TYPE
- || TREE_CODE (op) == ARRAY_TYPE)))
- {
- strcpy (tmpbuf, "("); strcat (tmpbuf, str); strcat (tmpbuf, ")");
- strcpy (str, tmpbuf);
- }
-
- decl = is_complex_decl (TREE_TYPE (decl))
- ? TREE_TYPE (decl)
- : NULLT;
- }
- while (decl && (code = TREE_CODE (decl)));
-
- break;
- }
- case IDENTIFIER_NODE:
- /* will only happen if we are processing a "raw" expr-decl. */
- return strcpy (buf, IDENTIFIER_POINTER (decl));
- }
-
- return str;
- }
- else /* we have an abstract declarator or a _DECL node */
- {
- return strcpy (buf, name);
- }
- }
-
- static void
- gen_declspecs (declspecs, buf, raw)
- tree declspecs;
- char *buf;
- int raw;
- {
- if (raw)
- {
- tree chain;
-
- for (chain = declspecs; chain; chain = TREE_CHAIN (chain))
- {
- tree aspec = TREE_VALUE (chain);
-
- if (TREE_CODE (aspec) == IDENTIFIER_NODE)
- strcat (buf, IDENTIFIER_POINTER (aspec));
- else if (TREE_CODE (aspec) == RECORD_TYPE)
- {
- if (TYPE_NAME (aspec))
- {
- if (!TREE_STATIC_TEMPLATE (aspec))
- strcat (buf, "struct ");
- strcat (buf, IDENTIFIER_POINTER (TYPE_NAME (aspec)));
- }
- else
- strcat (buf, "untagged struct");
- }
- else if (TREE_CODE (aspec) == UNION_TYPE)
- {
- if (TYPE_NAME (aspec))
- {
- if (!TREE_STATIC_TEMPLATE (aspec))
- strcat (buf, "union ");
- strcat (buf, IDENTIFIER_POINTER (TYPE_NAME (aspec)));
- }
- else
- strcat (buf, "untagged union");
- }
- else if (TREE_CODE (aspec) == ENUMERAL_TYPE)
- {
- if (TYPE_NAME (aspec))
- {
- if (!TREE_STATIC_TEMPLATE (aspec))
- strcat (buf, "enum ");
- strcat (buf, IDENTIFIER_POINTER (TYPE_NAME (aspec)));
- }
- else
- strcat (buf, "untagged enum");
- }
- strcat (buf, " ");
- }
- }
- else
- switch (TREE_CODE (declspecs))
- {
- /* type specifiers */
-
- case INTEGER_TYPE: /* signed integer types */
-
- if (declspecs == short_integer_type_node) /* 's' */
- strcat (buf, "short int ");
- else if (declspecs == integer_type_node) /* 'i' */
- strcat (buf, "int ");
- else if (declspecs == long_integer_type_node) /* 'l' */
- strcat (buf, "long int ");
- else if (declspecs == signed_char_type_node || /* 'c' */
- declspecs == char_type_node)
- strcat (buf, "char ");
-
- /* unsigned integer types */
-
- else if (declspecs == short_unsigned_type_node) /* 'S' */
- strcat (buf, "unsigned short ");
- else if (declspecs == unsigned_type_node) /* 'I' */
- strcat (buf, "unsigned int ");
- else if (declspecs == long_unsigned_type_node) /* 'L' */
- strcat (buf, "unsigned long ");
- else if (declspecs == unsigned_char_type_node) /* 'C' */
- strcat (buf, "unsigned char ");
- break;
-
- case REAL_TYPE: /* floating point types */
-
- if (declspecs == float_type_node) /* 'f' */
- strcat (buf, "float ");
- else if (declspecs == double_type_node) /* 'd' */
- strcat (buf, "double ");
- else if (declspecs == long_double_type_node) /* 'd' */
- strcat (buf, "long double ");
- break;
-
- case RECORD_TYPE:
- if (!TREE_STATIC_TEMPLATE (declspecs))
- strcat (buf, "struct ");
- if (TYPE_NAME (declspecs) &&
- (TREE_CODE (TYPE_NAME (declspecs)) == IDENTIFIER_NODE))
- {
- strcat (buf, IDENTIFIER_POINTER (TYPE_NAME (declspecs)));
- strcat (buf, " ");
- }
- break;
- case UNION_TYPE:
- strcat (buf, "union ");
- if (TYPE_NAME (declspecs) &&
- (TREE_CODE (TYPE_NAME (declspecs)) == IDENTIFIER_NODE))
- {
- strcat (buf, IDENTIFIER_POINTER (TYPE_NAME (declspecs)));
- strcat (buf, " ");
- }
- break;
- case ENUMERAL_TYPE:
- strcat (buf, "enum ");
- if (TYPE_NAME (declspecs) &&
- (TREE_CODE (TYPE_NAME (declspecs)) == IDENTIFIER_NODE))
- {
- strcat (buf, IDENTIFIER_POINTER (TYPE_NAME (declspecs)));
- strcat (buf, " ");
- }
- break;
- case VOID_TYPE:
- strcat (buf, "void ");
- }
- }
-
- static char *
- gen_declaration (atype_or_adecl, buf)
- tree atype_or_adecl;
- char *buf;
- {
- char declbuf[256];
-
- if (TREE_CODE (atype_or_adecl) == TREE_LIST)
- {
- tree declspecs; /* "identifier_node", "record_type" */
- tree declarator; /* "array_ref", "indirect_ref", "call_expr"... */
-
- /* we have a "raw", abstract declarator (typename) */
- declarator = TREE_VALUE (atype_or_adecl);
- declspecs = TREE_PURPOSE (atype_or_adecl);
-
- gen_declspecs (declspecs, buf, 1);
- strcat (buf, gen_declarator (declarator, declbuf, ""));
- }
- else
- {
- tree atype;
- tree declspecs; /* "integer_type", "real_type", "record_type"... */
- tree declarator; /* "array_type", "function_type", "pointer_type". */
-
- if (TREE_CODE (atype_or_adecl) == FIELD_DECL
- || TREE_CODE (atype_or_adecl) == PARM_DECL
- || TREE_CODE (atype_or_adecl) == FUNCTION_DECL)
- atype = TREE_TYPE (atype_or_adecl);
- else
- atype = atype_or_adecl; /* assume we have a *_type node */
-
- if (is_complex_decl (atype))
- {
- tree chain;
-
- /* get the declaration specifier...it is at the end of the list */
- declarator = chain = atype;
- do
- chain = TREE_TYPE (chain); /* not TREE_CHAIN (chain); */
- while (is_complex_decl (chain));
- declspecs = chain;
- }
- else
- {
- declspecs = atype;
- declarator = NULLT;
- }
-
- gen_declspecs (declspecs, buf, 0);
-
- if (TREE_CODE (atype_or_adecl) == FIELD_DECL
- || TREE_CODE (atype_or_adecl) == PARM_DECL
- || TREE_CODE (atype_or_adecl) == FUNCTION_DECL)
- {
- if (declarator)
- {
- strcat (buf, gen_declarator (declarator, declbuf,
- IDENTIFIER_POINTER (DECL_NAME (atype_or_adecl))));
- }
- else
- strcat (buf, IDENTIFIER_POINTER (DECL_NAME (atype_or_adecl)));
- }
- else
- {
- strcat (buf, gen_declarator (declarator, declbuf, ""));
- }
- }
- return buf;
- }
-
- #define RAW_TYPESPEC(meth) (TREE_VALUE (TREE_PURPOSE (TREE_TYPE (meth))))
-
- static char *
- gen_method_decl (method, buf)
- tree method;
- char *buf;
- {
- tree chain;
-
- if (RAW_TYPESPEC (method) != objc_object_reference)
- {
- strcpy (buf, "(");
- gen_declaration (TREE_TYPE (method), buf);
- strcat (buf, ")");
- }
-
- chain = METHOD_SEL_ARGS (method);
- if (chain)
- { /* we have a chain of keyword_decls */
- do
- {
- if (KEYWORD_KEY_NAME (chain))
- strcat (buf, IDENTIFIER_POINTER (KEYWORD_KEY_NAME (chain)));
-
- strcat (buf, ":");
- if (RAW_TYPESPEC (chain) != objc_object_reference)
- {
- strcat (buf, "(");
- gen_declaration (TREE_TYPE (chain), buf);
- strcat (buf, ")");
- }
- strcat (buf, IDENTIFIER_POINTER (KEYWORD_ARG_NAME (chain)));
- if (chain = TREE_CHAIN (chain))
- strcat (buf, " ");
- }
- while (chain);
-
- if (METHOD_ADD_ARGS (method) == (tree)1)
- strcat (buf, ", ...");
- else if (METHOD_ADD_ARGS (method))
- { /* we have a tree list node as generate by `get_parm_info ()' */
- chain = TREE_PURPOSE (METHOD_ADD_ARGS (method));
- /* know we have a chain of parm_decls */
- while (chain)
- {
- strcat (buf, ", ");
- gen_declaration (chain, buf);
- chain = TREE_CHAIN (chain);
- }
- }
- }
- else /* we have a unary selector */
- {
- strcat (buf, IDENTIFIER_POINTER (METHOD_SEL_NAME (method)));
- }
-
- return buf;
- }
-
- void
- gen_prototype (fp, decl)
- FILE *fp;
- tree decl;
- {
- /* we have a function definition - generate prototype */
- bzero (errbuf, BUFSIZE);
- gen_declaration (decl, errbuf);
- fprintf (fp, "%s;\n", errbuf);
- }
- /*
- * debug info...
- */
- static void
- dump_interface (fp, chain)
- FILE *fp;
- tree chain;
- {
- char *buf = (char *)xmalloc (256);
- char *my_name = IDENTIFIER_POINTER (CLASS_NAME (chain));
- tree ivar_decls = CLASS_RAW_IVARS (chain);
- tree nst_methods = CLASS_NST_METHODS (chain);
- tree cls_methods = CLASS_CLS_METHODS (chain);
-
- fprintf (fp, "\n@interface %s", my_name);
-
- if (CLASS_SUPER_NAME (chain))
- {
- char *super_name = IDENTIFIER_POINTER (CLASS_SUPER_NAME (chain));
- fprintf (fp, " : %s\n", super_name);
- }
- else
- fprintf (fp, "\n");
-
- if (ivar_decls)
- {
- fprintf (fp, "{\n");
- do
- {
- bzero (buf, 256);
- fprintf (fp, "\t%s;\n", gen_declaration (ivar_decls, buf));
- ivar_decls = TREE_CHAIN (ivar_decls);
- }
- while (ivar_decls);
- fprintf (fp, "}\n");
- }
-
- while (nst_methods)
- {
- bzero (buf, 256);
- fprintf (fp, "- %s;\n", gen_method_decl (nst_methods, buf));
- nst_methods = TREE_CHAIN (nst_methods);
- }
-
- while (cls_methods)
- {
- bzero (buf, 256);
- fprintf (fp, "+ %s;\n", gen_method_decl (cls_methods, buf));
- cls_methods = TREE_CHAIN (cls_methods);
- }
- fprintf (fp, "\n@end");
- }
-
- void
- init_objc ()
- {
- /* Add the special tree codes of Objective C to the tables. */
-
- gcc_obstack_init (&util_obstack);
- util_firstobj = (char *) obstack_finish (&util_obstack);
-
- tree_code_type
- = (char **) realloc (tree_code_type,
- sizeof (char *) * LAST_OBJC_TREE_CODE);
- tree_code_length
- = (int *) realloc (tree_code_length,
- sizeof (int) * LAST_OBJC_TREE_CODE);
- tree_code_name
- = (char **) realloc (tree_code_name,
- sizeof (char *) * LAST_OBJC_TREE_CODE);
- bcopy (objc_tree_code_type,
- tree_code_type + (int) LAST_AND_UNUSED_TREE_CODE,
- (((int) LAST_OBJC_TREE_CODE - (int) LAST_AND_UNUSED_TREE_CODE)
- * sizeof (char *)));
- bcopy (objc_tree_code_length,
- tree_code_length + (int) LAST_AND_UNUSED_TREE_CODE,
- (((int) LAST_OBJC_TREE_CODE - (int) LAST_AND_UNUSED_TREE_CODE)
- * sizeof (int)));
- bcopy (objc_tree_code_name,
- tree_code_name + (int) LAST_AND_UNUSED_TREE_CODE,
- (((int) LAST_OBJC_TREE_CODE - (int) LAST_AND_UNUSED_TREE_CODE)
- * sizeof (char *)));
-
- errbuf = (char *)xmalloc (BUFSIZE);
- hash_init ();
- synth_module_prologue ();
- }
-
- void
- finish_objc ()
- {
- struct imp_entry *impent;
- tree chain;
-
- generate_forward_declaration_to_string_table ();
-
- #ifdef OBJC_PROLOGUE
- OBJC_PROLOGUE;
- #endif
-
- if (implementation_context || sel_refdef_chain)
- generate_objc_symtab_decl ();
-
- for (impent = imp_list; impent; impent = impent->next)
- {
- implementation_context = impent->imp_context;
- implementation_template = impent->imp_template;
-
- _OBJC_CLASS_decl = impent->class_decl;
- _OBJC_METACLASS_decl = impent->meta_decl;
-
- if (TREE_CODE (implementation_context) == IMPLEMENTATION_TYPE)
- {
- /* all of the following reference the string pool... */
- generate_ivar_lists ();
- generate_dispatch_tables ();
- generate_shared_structures ();
- }
- else
- {
- generate_dispatch_tables ();
- generate_category (implementation_context);
- }
- }
-
- /* If we are using an array of selectors, we must always
- finish up the array decl even if no selectors were used. */
- #ifndef OBJC_SELECTORS_WITHOUT_LABELS
- if (sel_ref_chain)
- #endif
- build_selector_translation_table ();
-
- if (implementation_context || sel_refdef_chain)
- {
- /* Arrange for Objc data structures to be initialized at run time. */
-
- char *init_name = build_module_descriptor ();
- if (init_name)
- assemble_constructor (init_name);
- }
-
- /* dump the string table last */
-
- if (sel_refdef_chain)
- {
- build_message_selector_pool ();
- }
-
- /* dump the class references...this forces the appropriate classes
- to be linked into the executable image, preserving unix archive
- semantics...this can be removed when we move to a more dynamically
- linked environment
- */
- for (chain = cls_ref_chain; chain; chain = TREE_CHAIN (chain))
- handle_class_ref (chain);
-
- for (impent = imp_list; impent; impent = impent->next)
- handle_impent (impent);
-
- #if 0 /* If GAS has such a bug, let's fix it. */
- /*** this fixes a gross bug in the assembler...it `expects' #APP to have
- *** a matching #NO_APP, or it crashes (sometimes). app_disable () will
- *** insure this is the case. 5/19/89, s.naroff.
- ***/
- if (cls_ref_chain || imp_list)
- app_disable ();
- #endif
-
- if (flag_gen_declaration)
- {
- add_class (implementation_context);
- dump_interface (gen_declaration_file, implementation_context);
- }
- if (warn_selector)
- {
- int slot;
-
- /* Run through the selector hash tables and print a warning for any
- selector which has multiple methods. */
-
- for (slot = 0; slot < SIZEHASHTABLE; slot++)
- {
- hash hsh;
-
- for (hsh = cls_method_hash_list[slot]; hsh; hsh = hsh->next)
- {
- if (hsh->list)
- {
- tree meth = hsh->key;
- char type = (TREE_CODE (meth) == INSTANCE_METHOD_DECL)
- ? '-' : '+';
- attr loop;
-
- warning ("potential selector conflict for method `%s'",
- IDENTIFIER_POINTER (METHOD_SEL_NAME (meth)));
- warn_with_method ("found", type, meth);
- for (loop = hsh->list; loop; loop = loop->next)
- warn_with_method ("found", type, loop->value);
- }
- }
- }
-
- for (slot = 0; slot < SIZEHASHTABLE; slot++)
- {
- hash hsh;
-
- for (hsh = nst_method_hash_list[slot]; hsh; hsh = hsh->next)
- {
- if (hsh->list)
- {
- tree meth = hsh->key;
- char type = (TREE_CODE (meth) == INSTANCE_METHOD_DECL)
- ? '-' : '+';
- attr loop;
-
- warning ("potential selector conflict for method `%s'",
- IDENTIFIER_POINTER (METHOD_SEL_NAME (meth)));
- warn_with_method ("found", type, meth);
- for (loop = hsh->list; loop; loop = loop->next)
- warn_with_method ("found", type, loop->value);
- }
- }
- }
- }
- }
-
- /* Subroutines of finish_objc. */
-
- handle_class_ref (chain)
- tree chain;
- {
- tree decl;
- char *string
- = (char *) alloca (strlen (IDENTIFIER_POINTER (TREE_VALUE (chain))) + 30);
-
- sprintf (string, "__objc_class_name_%s",
- IDENTIFIER_POINTER (TREE_VALUE (chain)));
-
- /* Make a decl for this name, so we can use its address in a tree. */
- decl = build_decl (VAR_DECL, get_identifier (string), char_type_node);
- DECL_EXTERNAL (decl) = 1;
- TREE_PUBLIC (decl) = 1;
-
- pushdecl (decl);
- rest_of_decl_compilation (decl, 0, 0, 0);
-
- /* Make following constant read-only (why not)? */
- text_section ();
-
- /* Output a constant to reference this address. */
- output_constant (build1 (ADDR_EXPR, string_type_node, decl),
- int_size_in_bytes (string_type_node));
- }
-
- handle_impent (impent)
- struct imp_entry *impent;
- {
- implementation_context = impent->imp_context;
- implementation_template = impent->imp_template;
-
- if (TREE_CODE (impent->imp_context) == IMPLEMENTATION_TYPE)
- {
- char *string
- = (char *) alloca (strlen (IDENTIFIER_POINTER (CLASS_NAME (impent->imp_context))) + 30);
-
- sprintf (string, "__objc_class_name_%s",
- IDENTIFIER_POINTER (CLASS_NAME (impent->imp_context)));
- assemble_global (string);
- assemble_label (string);
- }
- else if (TREE_CODE (impent->imp_context) == CATEGORY_TYPE)
- {
- char *string
- = (char *) alloca (strlen (IDENTIFIER_POINTER (CLASS_NAME (impent->imp_context)))
- + strlen (IDENTIFIER_POINTER (CLASS_SUPER_NAME (impent->imp_context)))
- + 30);
-
- /* Do the same for categories. Even though no references to these
- symbols are generated automatically by the compiler, it gives
- you a handle to pull them into an archive by hand. */
- sprintf (string, "__objc_category_name_%s_%s",
- IDENTIFIER_POINTER (CLASS_NAME (impent->imp_context)),
- IDENTIFIER_POINTER (CLASS_SUPER_NAME (impent->imp_context)));
- assemble_global (string);
- assemble_label (string);
- }
- }
-
- #ifdef DEBUG
-
- static void
- objc_debug (fp)
- FILE *fp;
- {
- char *buf = (char *)xmalloc (256);
-
- { /* dump function prototypes */
- tree loop = _OBJC_MODULES_decl;
-
- fprintf (fp, "\n\nfunction prototypes:\n");
- while (loop)
- {
- if (TREE_CODE (loop) == FUNCTION_DECL && DECL_INITIAL (loop))
- {
- /* we have a function definition - generate prototype */
- bzero (errbuf, BUFSIZE);
- gen_declaration (loop, errbuf);
- fprintf (fp, "%s;\n", errbuf);
- }
- loop = TREE_CHAIN (loop);
- }
- }
- { /* dump global chains */
- tree loop;
- int i, index = 0, offset = 0;
- hash hashlist;
-
- for (i = 0; i < SIZEHASHTABLE; i++)
- {
- if (hashlist = nst_method_hash_list[i])
- {
- fprintf (fp, "\n\nnst_method_hash_list[%d]:\n", i);
- do
- {
- bzero (buf, 256);
- fprintf (fp, "-%s;\n", gen_method_decl (hashlist->key, buf));
- hashlist = hashlist->next;
- }
- while (hashlist);
- }
- }
- for (i = 0; i < SIZEHASHTABLE; i++)
- {
- if (hashlist = cls_method_hash_list[i])
- {
- fprintf (fp, "\n\ncls_method_hash_list[%d]:\n", i);
- do
- {
- bzero (buf, 256);
- fprintf (fp, "-%s;\n", gen_method_decl (hashlist->key, buf));
- hashlist = hashlist->next;
- }
- while (hashlist);
- }
- }
- fprintf (fp, "\nsel_refdef_chain:\n");
- for (loop = sel_refdef_chain; loop; loop = TREE_CHAIN (loop))
- {
- fprintf (fp, "(index: %4d offset: %4d) %s\n", index, offset,
- IDENTIFIER_POINTER (TREE_VALUE (loop)));
- index++;
- /* add one for the '\0' character */
- offset += IDENTIFIER_LENGTH (TREE_VALUE (loop)) + 1;
- }
- fprintf (fp, "\n (max_selector_index: %4d.\n", max_selector_index);
- }
- }
- #endif
-
- void
- print_lang_statistics ()
- {
- }
-