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
  43 extern char *program_name;
  44
  45 /*---------------------------.
  46 | Display the help message.  |
  47 `---------------------------*/
  48
  49 static void
  50 usage (FILE *stream)
  51 {
  52   /* Some efforts were made to ease the translators' task, please
  53      continue.  */
  54   fputs (_("\
  55 GNU bison generates parsers for LALR(1) grammars.\n"), stream);
  56   putc ('\n', stream);
  57
  58   fprintf (stream, _("\
  59 Usage: %s [OPTION]... FILE\n"), program_name);
  60   putc ('\n', stream);
  61
  62   fputs (_("\
  63 If a long option shows an argument as mandatory, then it is mandatory\n\
  64 for the equivalent short option also.  Similarly for optional arguments.\n"),
  65          stream);
  66   putc ('\n', stream);
  67
  68   fputs (_("\
  69 Operation modes:\n\
  70   -h, --help      display this help and exit\n\
  71   -V, --version   output version information and exit\n\
  72   -y, --yacc      emulate POSIX yacc\n"), stream);
  73   putc ('\n', stream);
  74
  75   fputs (_("\
  76 Parser:\n\
  77   -S, --skeleton=FILE        specify the skeleton to use\n\
  78   -t, --debug                instrument the parser for debugging\n\
  79       --locations            enable locations computation\n\
  80   -p, --name-prefix=PREFIX   prepend PREFIX to the external symbols\n\
  81   -l, --no-lines             don't generate `#line' directives\n\
  82   -n, --no-parser            generate the tables only\n\
  83   -k, --token-table          include a table of token names\n\
  84 "), stream);
  85   putc ('\n', stream);
  86
  87   fputs (_("\
  88 Output:\n\
  89   -d, --defines              also produce a header file\n\
  90   -v, --verbose              also produce an explanation of the automaton\n\
  91   -b, --file-prefix=PREFIX   specify a PREFIX for output files\n\
  92   -o, --output=FILE          leave output to FILE\n\
  93   -g, --graph                also produce a VCG description of the automaton\n\
  94 "), stream);
  95   putc ('\n', stream);
  96
  97   fputs (_("\
  98 Report bugs to <bug-bison@gnu.org>.\n"), stream);
  99 }
 100
 101
 102 /*------------------------------.
 103 | Display the version message.  |
 104 `------------------------------*/
 105
 106 static void
 107 version (FILE *stream)
 108 {
 109   /* Some efforts were made to ease the translators' task, please
 110      continue.  */
 111   fprintf (stream, _("\
 112 bison (GNU Bison) %s"), VERSION);
 113   putc ('\n', stream);
 114   putc ('\n', stream);
 115
 116   fputs (_("\
 117 Copyright 1984, 1986, 1989, 1992, 2000, 2001 Free Software Foundation, Inc.\n"),
 118          stream);
 119
 120   fputs (_("\
 121 This is free software; see the source for copying conditions.  There is NO\n\
 122 warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\
 123 "),
 124          stream);
 125 }
 126
 127
 128 /*----------------------.
 129 | Process the options.  |
 130 `----------------------*/
 131
 132 void
 133 getargs (int argc, char *argv[])
 134 {
 135   int c;
 136
 137   create_long_option_table ();
 138   while ((c = getopt_long (argc, argv, shortopts, longopts, NULL)) != EOF)
 139     switch (c)
 140       {
 141       case 0:
 142         /* Certain long options cause getopt_long to return 0.  */
 143         break;
 144
 145       case 'y':
 146         yacc_flag = 1;
 147         break;
 148
 149       case 'h':
 150         usage (stdout);
 151         exit (0);
 152
 153       case 'V':
 154         version (stdout);
 155         exit (0);
 156
 157       case 'g':
 158         /* Here, the -g and --graph=FILE options are differentiated.  */
 159         graph_flag = 1;
 160         spec_graph_file = optarg;
 161         break;
 162
 163       case 'v':
 164         verbose_flag = 1;
 165         break;
 166
 167       case 'S':
 168         skeleton = optarg;
 169         break;
 170
 171       case 'd':
 172         /* Here, the -d and --defines options are differentiated.  */
 173         defines_flag = 1;
 174         spec_defines_file = optarg;
 175         break;
 176
 177       case 'l':
 178         no_lines_flag = 1;
 179         break;
 180
 181       case 'k':
 182         token_table_flag = 1;
 183         break;
 184
 185       case 'r':
 186         fatal (_("`%s' is no longer supported"), "--raw");
 187         break;
 188
 189       case 'n':
 190         no_parser_flag = 1;
 191         break;
 192
 193       case 't':
 194         debug_flag = 1;
 195         break;
 196
 197       case 'o':
 198         spec_outfile = optarg;
 199         break;
 200
 201       case 'b':
 202         spec_file_prefix = optarg;
 203         break;
 204
 205       case 'p':
 206         spec_name_prefix = optarg;
 207         break;
 208
 209       default:
 210         fprintf (stderr, _("Try `%s --help' for more information.\n"),
 211                  program_name);
 212         exit (1);
 213       }
 214
 215   XFREE (longopts);
 216   if (optind == argc)
 217     {
 218       fprintf (stderr, _("%s: no grammar file given\n"), program_name);
 219       exit (1);
 220     }
 221   if (optind < argc - 1)
 222     fprintf (stderr, _("%s: extra arguments ignored after `%s'\n"),
 223              program_name, argv[optind]);
 224
 225   infile = argv[optind];
 226 }