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 "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"
  33 extern char *yy_cur;
  34 extern cpp_reader  parse_in;
  35 extern 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
  41 int
  42 lang_decode_option (argc, argv)
  43      int argc;
  44      char **argv;
  45 {
  46   return c_decode_option (argc, argv);
  47 }
  48
  49 void
  50 lang_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
  59 void
  60 lang_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
  73 void
  74 lang_finish ()
  75 {
  76 }
  77
  78 char *
  79 lang_identify ()
  80 {
  81   return "c";
  82 }
  83
  84 void
  85 print_lang_statistics ()
  86 {
  87 }
  88
  89 /* used by print-tree.c */
  90
  91 void
  92 lang_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
 101 tree
 102 lookup_interface (arg)
 103      tree arg ATTRIBUTE_UNUSED;
 104 {
 105   return 0;
 106 }
 107
 108 tree
 109 is_class_name (arg)
 110     tree arg ATTRIBUTE_UNUSED;
 111 {
 112   return 0;
 113 }
 114
 115 void
 116 maybe_objc_check_decl (decl)
 117      tree decl ATTRIBUTE_UNUSED;
 118 {
 119 }
 120
 121 int
 122 maybe_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
 130 tree
 131 maybe_objc_method_name (decl)
 132     tree decl ATTRIBUTE_UNUSED;
 133 {
 134   return 0;
 135 }
 136
 137 tree
 138 maybe_building_objc_message_expr ()
 139 {
 140   return 0;
 141 }
 142
 143 int
 144 recognize_objc_keyword ()
 145 {
 146   return 0;
 147 }
 148
 149 tree
 150 build_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
 160 void
 161 finish_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, void_list_node,
 179                                         NULL_TREE),
 180                       NULL_TREE, NULL_TREE, 0);
 181       fnname = DECL_ASSEMBLER_NAME (current_function_decl);
 182       store_parm_decls ();
 183
 184       for (; static_ctors; static_ctors = TREE_CHAIN (static_ctors))
 185         expand_expr_stmt (build_function_call (TREE_VALUE (static_ctors),
 186                                                NULL_TREE));
 187
 188       finish_function (0);
 189
 190       assemble_constructor (IDENTIFIER_POINTER (fnname));
 191     }
 192 #endif
 193 #ifndef ASM_OUTPUT_DESTRUCTOR
 194   if (static_dtors)
 195     {
 196       tree fnname = get_file_function_name ('D');
 197       start_function (void_list_node,
 198                       build_parse_node (CALL_EXPR, fnname, void_list_node,
 199                                         NULL_TREE),
 200                       NULL_TREE, NULL_TREE, 0);
 201       fnname = DECL_ASSEMBLER_NAME (current_function_decl);
 202       store_parm_decls ();
 203
 204       for (; static_dtors; static_dtors = TREE_CHAIN (static_dtors))
 205         expand_expr_stmt (build_function_call (TREE_VALUE (static_dtors),
 206                                                NULL_TREE));
 207
 208       finish_function (0);
 209
 210       assemble_destructor (IDENTIFIER_POINTER (fnname));
 211     }
 212 #endif
 213 }