1/* Language-specific hook definitions for C front end.
2   Copyright (C) 1991, 1995, 1997, 1998 Free Software Foundation, Inc.
3
4This file is part of GNU CC.
5
6GNU CC is free software; you can redistribute it and/or modify
7it under the terms of the GNU General Public License as published by
8the Free Software Foundation; either version 2, or (at your option)
9any later version.
10
11GNU CC is distributed in the hope that it will be useful,
12but WITHOUT ANY WARRANTY; without even the implied warranty of
13MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14GNU General Public License for more details.
15
16You should have received a copy of the GNU General Public License
17along with GNU CC; see the file COPYING.  If not, write to
18the Free Software Foundation, 59 Temple Place - Suite 330,
19Boston, MA 02111-1307, USA.  */
20
21
22#include "config.h"
23#include "system.h"
24#include "tree.h"
25#include "input.h"
26#include "c-tree.h"
27#include "c-lex.h"
28#include "toplev.h"
29#include "output.h"
30
31#if USE_CPPLIB
32#include "cpplib.h"
33extern char *yy_cur;
34extern cpp_reader  parse_in;
35extern cpp_options parse_options;
36#endif
37
38/* Each of the functions defined here
39   is an alternative to a function in objc-actions.c.  */
40
41int
42lang_decode_option (argc, argv)
43     int argc;
44     char **argv;
45{
46  return c_decode_option (argc, argv);
47}
48
49void
50lang_init_options ()
51{
52#if USE_CPPLIB
53  cpp_reader_init (&parse_in);
54  parse_in.opts = &parse_options;
55  cpp_options_init (&parse_options);
56#endif
57}
58
59void
60lang_init ()
61{
62  /* the beginning of the file is a new line; check for # */
63  /* With luck, we discover the real source file's name from that
64     and put it in input_filename.  */
65#if !USE_CPPLIB
66  ungetc (check_newline (), finput);
67#else
68  check_newline ();
69  yy_cur--;
70#endif
71}
72
73void
74lang_finish ()
75{
76}
77
78char *
79lang_identify ()
80{
81  return "c";
82}
83
84void
85print_lang_statistics ()
86{
87}
88
89/* used by print-tree.c */
90
91void
92lang_print_xnode (file, node, indent)
93     FILE *file ATTRIBUTE_UNUSED;
94     tree node ATTRIBUTE_UNUSED;
95     int indent ATTRIBUTE_UNUSED;
96{
97}
98
99/* Used by c-lex.c, but only for objc.  */
100
101tree
102lookup_interface (arg)
103     tree arg ATTRIBUTE_UNUSED;
104{
105  return 0;
106}
107
108tree
109is_class_name (arg)
110    tree arg ATTRIBUTE_UNUSED;
111{
112  return 0;
113}
114
115void
116maybe_objc_check_decl (decl)
117     tree decl ATTRIBUTE_UNUSED;
118{
119}
120
121int
122maybe_objc_comptypes (lhs, rhs, reflexive)
123     tree lhs ATTRIBUTE_UNUSED;
124     tree rhs ATTRIBUTE_UNUSED;
125     int reflexive ATTRIBUTE_UNUSED;
126{
127  return -1;
128}
129
130tree
131maybe_objc_method_name (decl)
132    tree decl ATTRIBUTE_UNUSED;
133{
134  return 0;
135}
136
137tree
138maybe_building_objc_message_expr ()
139{
140  return 0;
141}
142
143int
144recognize_objc_keyword ()
145{
146  return 0;
147}
148
149tree
150build_objc_string (len, str)
151    int len ATTRIBUTE_UNUSED;
152    const char *str ATTRIBUTE_UNUSED;
153{
154  abort ();
155  return NULL_TREE;
156}
157
158/* Called at end of parsing, but before end-of-file processing.  */
159
160void
161finish_file ()
162{
163#ifndef ASM_OUTPUT_CONSTRUCTOR
164  extern tree static_ctors;
165#endif
166#ifndef ASM_OUTPUT_DESTRUCTOR
167  extern tree static_dtors;
168#endif
169  extern tree build_function_call                 PROTO((tree, tree));
170#if !defined(ASM_OUTPUT_CONSTRUCTOR) || !defined(ASM_OUTPUT_DESTRUCTOR)
171  tree void_list_node = build_tree_list (NULL_TREE, void_type_node);
172#endif
173#ifndef ASM_OUTPUT_CONSTRUCTOR
174  if (static_ctors)
175    {
176      tree fnname = get_file_function_name ('I');
177      start_function (void_list_node,
178		      build_parse_node (CALL_EXPR, fnname,
179					tree_cons (NULL_TREE, NULL_TREE,
180						   void_list_node),
181					NULL_TREE),
182		      NULL_TREE, NULL_TREE, 0);
183      fnname = DECL_ASSEMBLER_NAME (current_function_decl);
184      store_parm_decls ();
185
186      for (; static_ctors; static_ctors = TREE_CHAIN (static_ctors))
187	expand_expr_stmt (build_function_call (TREE_VALUE (static_ctors),
188					       NULL_TREE));
189
190      finish_function (0);
191
192      assemble_constructor (IDENTIFIER_POINTER (fnname));
193    }
194#endif
195#ifndef ASM_OUTPUT_DESTRUCTOR
196  if (static_dtors)
197    {
198      tree fnname = get_file_function_name ('D');
199      start_function (void_list_node,
200		      build_parse_node (CALL_EXPR, fnname,
201					tree_cons (NULL_TREE, NULL_TREE,
202						   void_list_node),
203					NULL_TREE),
204		      NULL_TREE, NULL_TREE, 0);
205      fnname = DECL_ASSEMBLER_NAME (current_function_decl);
206      store_parm_decls ();
207
208      for (; static_dtors; static_dtors = TREE_CHAIN (static_dtors))
209	expand_expr_stmt (build_function_call (TREE_VALUE (static_dtors),
210					       NULL_TREE));
211
212      finish_function (0);
213
214      assemble_destructor (IDENTIFIER_POINTER (fnname));
215    }
216#endif
217}
218