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 statistics_flag = 0;
  38 int yacc_flag = 0;      /* for -y */
  39 int graph_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=FILE     leave output to FILE\n"), stream);
  93   putc ('\n', stream);
  94
  95   fputs (_("\
  96 Report bugs to <bug-bison@gnu.org>.\n"), stream);
  97 }
  98
  99
 100 /*------------------------------.
 101 | Display the version message.  |
 102 `------------------------------*/
 103
 104 static void
 105 version (FILE *stream)
 106 {
 107   /* Some efforts were made to ease the translators' task, please
 108      continue.  */
 109   fprintf (stream, _("\
 110 bison (GNU Bison) %s"), VERSION);
 111   putc ('\n', stream);
 112   putc ('\n', stream);
 113
 114   fputs (_("\
 115 Copyright 1984, 1986, 1989, 1992, 2000, 2001 Free Software Foundation, Inc.\n"),
 116          stream);
 117
 118   fputs (_("\
 119 This is free software; see the source for copying conditions.  There is NO\n\
 120 warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\
 121 "),
 122          stream);
 123 }
 124
 125
 126 /*----------------------.
 127 | Process the options.  |
 128 `----------------------*/
 129
 130 void
 131 getargs (int argc, char *argv[])
 132 {
 133   int c;
 134
 135   create_long_option_table ();
 136   while ((c = getopt_long (argc, argv, shortopts, longopts, NULL)) != EOF)
 137     switch (c)
 138       {
 139       case 0:
 140         /* Certain long options cause getopt_long to return 0.  */
 141         break;
 142
 143       case 'y':
 144         yacc_flag = 1;
 145         break;
 146
 147       case 'h':
 148         usage (stdout);
 149         exit (0);
 150
 151       case 'V':
 152         version (stdout);
 153         exit (0);
 154
 155       case 'g':
 156         graph_flag = 1;
 157         break;
 158
 159       case 'v':
 160         verbose_flag = 1;
 161         break;
 162
 163       case 'S':
 164         skeleton = optarg;
 165         break;
 166
 167       case 'd':
 168         defines_flag = 1;
 169         break;
 170
 171       case 'l':
 172         no_lines_flag = 1;
 173         break;
 174
 175       case 'k':
 176         token_table_flag = 1;
 177         break;
 178
 179       case 'r':
 180         fatal (_("`%s' is no longer supported"), "--raw");
 181         break;
 182
 183       case 'n':
 184         no_parser_flag = 1;
 185         break;
 186
 187       case 't':
 188         debug_flag = 1;
 189         break;
 190
 191       case 'o':
 192         spec_outfile = optarg;
 193         break;
 194
 195       case 'b':
 196         spec_file_prefix = optarg;
 197         break;
 198
 199       case 'p':
 200         spec_name_prefix = optarg;
 201         break;
 202
 203       default:
 204         fprintf (stderr, _("Try `%s --help' for more information.\n"),
 205                  program_name);
 206         exit (1);
 207       }
 208
 209   XFREE (longopts);
 210   if (optind == argc)
 211     {
 212       fprintf (stderr, _("%s: no grammar file given\n"), program_name);
 213       exit (1);
 214     }
 215   if (optind < argc - 1)
 216     fprintf (stderr, _("%s: extra arguments ignored after `%s'\n"),
 217              program_name, argv[optind]);
 218
 219   infile = argv[optind];
 220 }