src/getargs.c

   1 /* Parse command line arguments for bison.
   2    Copyright 1984, 1986, 1989, 1992, 2000, 2001 Free Software Foundation, Inc.
   3
   4    This file is part of Bison, the GNU Compiler Compiler.
   5
   6    Bison is free software; you can redistribute it and/or modify it
   7    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    Bison is distributed in the hope that it will be useful, but
  12    WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with Bison; see the file COPYING.  If not, write to the Free
  18    Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  19    02111-1307, USA.  */
  20
  21 #include <stdio.h>
  22 #include "getopt.h"
  23 #include "system.h"
  24 #include "files.h"
  25 #include "complain.h"
  26 #include "getargs.h"
  27 #include "xalloc.h"
  28 #include "options.h"
  29
  30 int debug_flag = 0;
  31 int defines_flag = 0;
  32 int locations_flag = 0;
  33 int no_lines_flag = 0;
  34 int no_parser_flag = 0;
  35 int token_table_flag = 0;
  36 int verbose_flag = 0;
  37 int yacc_flag = 0;      /* for -y */
  38 int graph_flag = 0;
  39 int trace_flag = 0;
  40
  41 const char *skeleton = NULL;
  42 const char *include = NULL;
  43
  44 extern char *program_name;
  45
  46 /*---------------------------.
  47 | Display the help message.  |
  48 `---------------------------*/
  49
  50 static void
  51 usage (FILE *stream)
  52 {
  53   /* Some efforts were made to ease the translators' task, please
  54      continue.  */
  55   fputs (_("\
  56 GNU bison generates parsers for LALR(1) grammars.\n"), stream);
  57   putc ('\n', stream);
  58
  59   fprintf (stream, _("\
  60 Usage: %s [OPTION]... FILE\n"), program_name);
  61   putc ('\n', stream);
  62
  63   fputs (_("\
  64 If a long option shows an argument as mandatory, then it is mandatory\n\
  65 for the equivalent short option also.  Similarly for optional arguments.\n"),
  66          stream);
  67   putc ('\n', stream);
  68
  69   fputs (_("\
  70 Operation modes:\n\
  71   -h, --help      display this help and exit\n\
  72   -V, --version   output version information and exit\n\
  73   -y, --yacc      emulate POSIX yacc\n"), stream);
  74   putc ('\n', stream);
  75
  76   fputs (_("\
  77 Parser:\n\
  78   -S, --skeleton=FILE        specify the skeleton to use\n\
  79   -t, --debug                instrument the parser for debugging\n\
  80       --locations            enable locations computation\n\
  81   -p, --name-prefix=PREFIX   prepend PREFIX to the external symbols\n\
  82   -l, --no-lines             don't generate `#line' directives\n\
  83   -n, --no-parser            generate the tables only\n\
  84   -k, --token-table          include a table of token names\n\
  85 "), stream);
  86   putc ('\n', stream);
  87
  88   fputs (_("\
  89 Output:\n\
  90   -d, --defines              also produce a header file\n\
  91   -v, --verbose              also produce an explanation of the automaton\n\
  92   -b, --file-prefix=PREFIX   specify a PREFIX for output files\n\
  93   -o, --output=FILE          leave output to FILE\n\
  94   -g, --graph                also produce a VCG description of the automaton\n\
  95 "), stream);
  96   putc ('\n', stream);
  97
  98   fputs (_("\
  99 Report bugs to <bug-bison@gnu.org>.\n"), stream);
 100 }
 101
 102
 103 /*------------------------------.
 104 | Display the version message.  |
 105 `------------------------------*/
 106
 107 static void
 108 version (FILE *stream)
 109 {
 110   /* Some efforts were made to ease the translators' task, please
 111      continue.  */
 112   fprintf (stream, _("\
 113 bison (GNU Bison) %s"), VERSION);
 114   putc ('\n', stream);
 115   putc ('\n', stream);
 116
 117   fputs (_("\
 118 Copyright 1984, 1986, 1989, 1992, 2000, 2001 Free Software Foundation, Inc.\n"),
 119          stream);
 120
 121   fputs (_("\
 122 This is free software; see the source for copying conditions.  There is NO\n\
 123 warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\
 124 "),
 125          stream);
 126 }
 127
 128
 129 /*----------------------.
 130 | Process the options.  |
 131 `----------------------*/
 132
 133 void
 134 getargs (int argc, char *argv[])
 135 {
 136   int c;
 137
 138   struct option *longopts = long_option_table_new ();
 139   while ((c = getopt_long (argc, argv, shortopts, longopts, NULL)) != EOF)
 140     switch (c)
 141       {
 142       case 0:
 143         /* Certain long options cause getopt_long to return 0.  */
 144         break;
 145
 146       case 'y':
 147         yacc_flag = 1;
 148         break;
 149
 150       case 'h':
 151         usage (stdout);
 152         exit (0);
 153
 154       case 'V':
 155         version (stdout);
 156         exit (0);
 157
 158       case 'g':
 159         /* Here, the -g and --graph=FILE options are differentiated.  */
 160         graph_flag = 1;
 161         spec_graph_file = optarg;
 162         break;
 163
 164       case 'v':
 165         verbose_flag = 1;
 166         break;
 167
 168       case 'S':
 169         skeleton = optarg;
 170         break;
 171
 172       case 'I':
 173         include = optarg;
 174         break;
 175
 176       case 'd':
 177         /* Here, the -d and --defines options are differentiated.  */
 178         defines_flag = 1;
 179         spec_defines_file = optarg;
 180         break;
 181
 182       case 'l':
 183         no_lines_flag = 1;
 184         break;
 185
 186       case 'k':
 187         token_table_flag = 1;
 188         break;
 189
 190       case 'r':
 191         fatal (_("`%s' is no longer supported"), "--raw");
 192         break;
 193
 194       case 'n':
 195         no_parser_flag = 1;
 196         break;
 197
 198       case 't':
 199         debug_flag = 1;
 200         break;
 201
 202       case 'o':
 203         spec_outfile = optarg;
 204         break;
 205
 206       case 'b':
 207         spec_file_prefix = optarg;
 208         break;
 209
 210       case 'p':
 211         spec_name_prefix = optarg;
 212         break;
 213
 214       default:
 215         fprintf (stderr, _("Try `%s --help' for more information.\n"),
 216                  program_name);
 217         exit (1);
 218       }
 219
 220   free (longopts);
 221
 222   if (optind == argc)
 223     {
 224       fprintf (stderr, _("%s: no grammar file given\n"), program_name);
 225       exit (1);
 226     }
 227   if (optind < argc - 1)
 228     fprintf (stderr, _("%s: extra arguments ignored after `%s'\n"),
 229              program_name, argv[optind]);
 230
 231   infile = argv[optind];
 232 }