src/getargs.c

   1 /* Parse command line arguments for bison.
   2    Copyright 1984, 1986, 1989, 1992, 2000, 2001, 2002
   3    Free Software Foundation, Inc.
   4
   5    This file is part of Bison, the GNU Compiler Compiler.
   6
   7    Bison is free software; you can redistribute it and/or modify it
   8    under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2, or (at your option)
  10    any later version.
  11
  12    Bison is distributed in the hope that it will be useful, but
  13    WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15    General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with Bison; see the file COPYING.  If not, write to the Free
  19    Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  20    02111-1307, USA.  */
  21
  22 #include <stdio.h>
  23 #include "getopt.h"
  24 #include "system.h"
  25 #include "files.h"
  26 #include "complain.h"
  27 #include "getargs.h"
  28 #include "xalloc.h"
  29 #include "options.h"
  30
  31 int debug_flag = 0;
  32 int defines_flag = 0;
  33 int locations_flag = 0;
  34 int no_lines_flag = 0;
  35 int no_parser_flag = 0;
  36 int token_table_flag = 0;
  37 int verbose_flag = 0;
  38 int yacc_flag = 0;      /* for -y */
  39 int graph_flag = 0;
  40 int trace_flag = 0;
  41
  42 const char *skeleton = NULL;
  43 const char *include = NULL;
  44
  45 extern char *program_name;
  46
  47 /*---------------------------.
  48 | Display the help message.  |
  49 `---------------------------*/
  50
  51 static void
  52 usage (FILE *stream)
  53 {
  54   /* Some efforts were made to ease the translators' task, please
  55      continue.  */
  56   fputs (_("\
  57 GNU bison generates parsers for LALR(1) grammars.\n"), stream);
  58   putc ('\n', stream);
  59
  60   fprintf (stream, _("\
  61 Usage: %s [OPTION]... FILE\n"), program_name);
  62   putc ('\n', stream);
  63
  64   fputs (_("\
  65 If a long option shows an argument as mandatory, then it is mandatory\n\
  66 for the equivalent short option also.  Similarly for optional arguments.\n"),
  67          stream);
  68   putc ('\n', stream);
  69
  70   fputs (_("\
  71 Operation modes:\n\
  72   -h, --help      display this help and exit\n\
  73   -V, --version   output version information and exit\n\
  74   -y, --yacc      emulate POSIX yacc\n"), stream);
  75   putc ('\n', stream);
  76
  77   fputs (_("\
  78 Parser:\n\
  79   -S, --skeleton=FILE        specify the skeleton to use\n\
  80   -t, --debug                instrument the parser for debugging\n\
  81       --locations            enable locations computation\n\
  82   -p, --name-prefix=PREFIX   prepend PREFIX to the external symbols\n\
  83   -l, --no-lines             don't generate `#line' directives\n\
  84   -n, --no-parser            generate the tables only\n\
  85   -k, --token-table          include a table of token names\n\
  86 "), stream);
  87   putc ('\n', stream);
  88
  89   fputs (_("\
  90 Output:\n\
  91   -d, --defines              also produce a header file\n\
  92   -v, --verbose              also produce an explanation of the automaton\n\
  93   -b, --file-prefix=PREFIX   specify a PREFIX for output files\n\
  94   -o, --output=FILE          leave output to FILE\n\
  95   -g, --graph                also produce a VCG description of the automaton\n\
  96 "), stream);
  97   putc ('\n', stream);
  98
  99   fputs (_("\
 100 Report bugs to <bug-bison@gnu.org>.\n"), stream);
 101 }
 102
 103
 104 /*------------------------------.
 105 | Display the version message.  |
 106 `------------------------------*/
 107
 108 static void
 109 version (FILE *stream)
 110 {
 111   /* Some efforts were made to ease the translators' task, please
 112      continue.  */
 113   fprintf (stream, _("bison (GNU Bison) %s"), VERSION);
 114   putc ('\n', stream);
 115   fputs (_("Written by Robert Corbett and Richard Stallman.\n"), stream);
 116   putc ('\n', stream);
 117
 118   fprintf (stream,
 119            _("Copyright (C) %d Free Software Foundation, Inc.\n"), 2002);
 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 /* Under DOS, there is no difference on the case.  This can be
 134    troublesome when looking for `.tab' etc.  */
 135 #ifdef MSDOS
 136 # define AS_FILE_NAME(File) (strlwr (File), (File))
 137 #else
 138 # define AS_FILE_NAME(File) (File)
 139 #endif
 140
 141 void
 142 getargs (int argc, char *argv[])
 143 {
 144   int c;
 145
 146   struct option *longopts = long_option_table_new ();
 147   while ((c = getopt_long (argc, argv, shortopts, longopts, NULL)) != EOF)
 148     switch (c)
 149       {
 150       case 0:
 151         /* Certain long options cause getopt_long to return 0.  */
 152         break;
 153
 154       case 'y':
 155         yacc_flag = 1;
 156         break;
 157
 158       case 'h':
 159         usage (stdout);
 160         exit (0);
 161
 162       case 'V':
 163         version (stdout);
 164         exit (0);
 165
 166       case 'g':
 167         /* Here, the -g and --graph=FILE options are differentiated.  */
 168         graph_flag = 1;
 169         spec_graph_file = AS_FILE_NAME (optarg);
 170         break;
 171
 172       case 'v':
 173         verbose_flag = 1;
 174         break;
 175
 176       case 'S':
 177         skeleton = AS_FILE_NAME (optarg);
 178         break;
 179
 180       case 'I':
 181         include = AS_FILE_NAME (optarg);
 182         break;
 183
 184       case 'd':
 185         /* Here, the -d and --defines options are differentiated.  */
 186         defines_flag = 1;
 187         if (optarg)
 188           spec_defines_file = AS_FILE_NAME (optarg);
 189         break;
 190
 191       case 'l':
 192         no_lines_flag = 1;
 193         break;
 194
 195       case 'k':
 196         token_table_flag = 1;
 197         break;
 198
 199       case 'r':
 200         fatal (_("`%s' is no longer supported"), "--raw");
 201         break;
 202
 203       case 'n':
 204         no_parser_flag = 1;
 205         break;
 206
 207       case 't':
 208         debug_flag = 1;
 209         break;
 210
 211       case 'o':
 212         spec_outfile = AS_FILE_NAME (optarg);
 213         break;
 214
 215       case 'b':
 216         spec_file_prefix = AS_FILE_NAME (optarg);
 217         break;
 218
 219       case 'p':
 220         spec_name_prefix = optarg;
 221         break;
 222
 223       default:
 224         fprintf (stderr, _("Try `%s --help' for more information.\n"),
 225                  program_name);
 226         exit (1);
 227       }
 228
 229   free (longopts);
 230
 231   if (optind == argc)
 232     {
 233       fprintf (stderr, _("%s: no grammar file given\n"), program_name);
 234       exit (1);
 235     }
 236   if (optind < argc - 1)
 237     fprintf (stderr, _("%s: extra arguments ignored after `%s'\n"),
 238              program_name, argv[optind]);
 239
 240   infile = argv[optind];
 241 }