gcc/c-lang.c

   1 /* Language-specific hook definitions for C front end.
   2    Copyright (C) 1991, 1995, 1997, 1998 Free Software Foundation, Inc.
   3
   4 This file is part of GNU CC.
   5
   6 GNU CC is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2, or (at your option)
   9 any later version.
  10
  11 GNU CC is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU CC; see the file COPYING.  If not, write to
  18 the Free Software Foundation, 59 Temple Place - Suite 330,
  19 Boston, MA 02111-1307, USA.  */
  20
  21
  22 #include "config.h"
  23 #include "system.h"
  24 #include "tree.h"
  25 #include "function.h"
  26 #include "input.h"
  27 #include "c-tree.h"
  28 #include "c-lex.h"
  29 #include "toplev.h"
  30 #include "output.h"
  31 #include "ggc.h"
  32
  33 #if USE_CPPLIB
  34 #include "cpplib.h"
  35 extern char *yy_cur;
  36 extern cpp_reader  parse_in;
  37 extern cpp_options parse_options;
  38 #endif
  39
  40 /* Each of the functions defined here
  41    is an alternative to a function in objc-actions.c.  */
  42
  43 int
  44 lang_decode_option (argc, argv)
  45      int argc;
  46      char **argv;
  47 {
  48   return c_decode_option (argc, argv);
  49 }
  50
  51 void
  52 lang_init_options ()
  53 {
  54 #if USE_CPPLIB
  55   cpp_reader_init (&parse_in);
  56   parse_in.opts = &parse_options;
  57   cpp_options_init (&parse_options);
  58 #endif
  59 }
  60
  61 void
  62 lang_init ()
  63 {
  64   /* the beginning of the file is a new line; check for # */
  65   /* With luck, we discover the real source file's name from that
  66      and put it in input_filename.  */
  67 #if !USE_CPPLIB
  68   ungetc (check_newline (), finput);
  69 #else
  70   check_newline ();
  71   yy_cur--;
  72 #endif
  73
  74   save_lang_status = &push_c_function_context;
  75   restore_lang_status = &pop_c_function_context;
  76   mark_lang_status = &mark_c_function_context;
  77
  78   c_parse_init ();
  79 }
  80
  81 void
  82 lang_finish ()
  83 {
  84 }
  85
  86 const char *
  87 lang_identify ()
  88 {
  89   return "c";
  90 }
  91
  92 void
  93 print_lang_statistics ()
  94 {
  95 }
  96
  97 /* used by print-tree.c */
  98
  99 void
 100 lang_print_xnode (file, node, indent)
 101      FILE *file ATTRIBUTE_UNUSED;
 102      tree node ATTRIBUTE_UNUSED;
 103      int indent ATTRIBUTE_UNUSED;
 104 {
 105 }
 106
 107 /* Used by c-lex.c, but only for objc.  */
 108
 109 tree
 110 lookup_interface (arg)
 111      tree arg ATTRIBUTE_UNUSED;
 112 {
 113   return 0;
 114 }
 115
 116 tree
 117 is_class_name (arg)
 118     tree arg ATTRIBUTE_UNUSED;
 119 {
 120   return 0;
 121 }
 122
 123 void
 124 maybe_objc_check_decl (decl)
 125      tree decl ATTRIBUTE_UNUSED;
 126 {
 127 }
 128
 129 int
 130 maybe_objc_comptypes (lhs, rhs, reflexive)
 131      tree lhs ATTRIBUTE_UNUSED;
 132      tree rhs ATTRIBUTE_UNUSED;
 133      int reflexive ATTRIBUTE_UNUSED;
 134 {
 135   return -1;
 136 }
 137
 138 tree
 139 maybe_objc_method_name (decl)
 140     tree decl ATTRIBUTE_UNUSED;
 141 {
 142   return 0;
 143 }
 144
 145 tree
 146 maybe_building_objc_message_expr ()
 147 {
 148   return 0;
 149 }
 150
 151 int
 152 recognize_objc_keyword ()
 153 {
 154   return 0;
 155 }
 156
 157 tree
 158 build_objc_string (len, str)
 159     int len ATTRIBUTE_UNUSED;
 160     const char *str ATTRIBUTE_UNUSED;
 161 {
 162   abort ();
 163   return NULL_TREE;
 164 }
 165
 166 /* Called at end of parsing, but before end-of-file processing.  */
 167
 168 void
 169 finish_file ()
 170 {
 171 #ifndef ASM_OUTPUT_CONSTRUCTOR
 172   extern tree static_ctors;
 173 #endif
 174 #ifndef ASM_OUTPUT_DESTRUCTOR
 175   extern tree static_dtors;
 176 #endif
 177   extern tree build_function_call                 PROTO((tree, tree));
 178 #if !defined(ASM_OUTPUT_CONSTRUCTOR) || !defined(ASM_OUTPUT_DESTRUCTOR)
 179   tree void_list_node_1 = build_tree_list (NULL_TREE, void_type_node);
 180 #endif
 181 #ifndef ASM_OUTPUT_CONSTRUCTOR
 182   if (static_ctors)
 183     {
 184       tree fnname = get_file_function_name ('I');
 185       start_function (void_list_node_1,
 186                       build_parse_node (CALL_EXPR, fnname,
 187                                         tree_cons (NULL_TREE, NULL_TREE,
 188                                                    void_list_node_1),
 189                                         NULL_TREE),
 190                       NULL_TREE, NULL_TREE, 0);
 191       fnname = DECL_ASSEMBLER_NAME (current_function_decl);
 192       store_parm_decls ();
 193
 194       for (; static_ctors; static_ctors = TREE_CHAIN (static_ctors))
 195         expand_expr_stmt (build_function_call (TREE_VALUE (static_ctors),
 196                                                NULL_TREE));
 197
 198       finish_function (0);
 199
 200       assemble_constructor (IDENTIFIER_POINTER (fnname));
 201     }
 202 #endif
 203 #ifndef ASM_OUTPUT_DESTRUCTOR
 204   if (static_dtors)
 205     {
 206       tree fnname = get_file_function_name ('D');
 207       start_function (void_list_node_1,
 208                       build_parse_node (CALL_EXPR, fnname,
 209                                         tree_cons (NULL_TREE, NULL_TREE,
 210                                                    void_list_node_1),
 211                                         NULL_TREE),
 212                       NULL_TREE, NULL_TREE, 0);
 213       fnname = DECL_ASSEMBLER_NAME (current_function_decl);
 214       store_parm_decls ();
 215
 216       for (; static_dtors; static_dtors = TREE_CHAIN (static_dtors))
 217         expand_expr_stmt (build_function_call (TREE_VALUE (static_dtors),
 218                                                NULL_TREE));
 219
 220       finish_function (0);
 221
 222       assemble_destructor (IDENTIFIER_POINTER (fnname));
 223     }
 224 #endif
 225 }