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 "system.h"
  23 #include "getopt.h"
  24 #include "argmatch.h"
  25 #include "complain.h"
  26 #include "getargs.h"
  27 #include "options.h"
  28 #include "files.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 report_flag = 0;
  36 int token_table_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 | --report's handling.  |
  48 `----------------------*/
  49
  50 static const char * const report_args[] =
  51 {
  52   /* In a series of synonyms, present the most meaningful first, so
  53      that argmatch_valid be more readable.  */
  54   "none",
  55   "state", "states",
  56   "itemset", "itemsets",
  57   "lookahead", "lookaheads",
  58   "all",
  59   0
  60 };
  61
  62 static const int report_types[] =
  63 {
  64   report_none,
  65   report_states, report_states,
  66   report_states | report_itemsets, report_states | report_itemsets,
  67   report_states | report_lookaheads, report_states | report_lookaheads,
  68   report_all
  69 };
  70
  71
  72 static void
  73 report_argmatch (char *args)
  74 {
  75   ARGMATCH_ASSERT (report_args, report_types);
  76   do
  77     {
  78       int report = XARGMATCH ("--report", args,
  79                               report_args, report_types);
  80       if (report == report_none)
  81         report_flag = report_none;
  82       else
  83         report_flag |= report;
  84     }
  85   while ((args = strtok (NULL, ",")));
  86 }
  87
  88 /*---------------------------.
  89 | Display the help message.  |
  90 `---------------------------*/
  91
  92 static void
  93 usage (FILE *stream)
  94 {
  95   /* Some efforts were made to ease the translators' task, please
  96      continue.  */
  97   fputs (_("\
  98 GNU bison generates parsers for LALR(1) grammars.\n"), stream);
  99   putc ('\n', stream);
 100
 101   fprintf (stream, _("\
 102 Usage: %s [OPTION]... FILE\n"), program_name);
 103   putc ('\n', stream);
 104
 105   fputs (_("\
 106 If a long option shows an argument as mandatory, then it is mandatory\n\
 107 for the equivalent short option also.  Similarly for optional arguments.\n"),
 108          stream);
 109   putc ('\n', stream);
 110
 111   fputs (_("\
 112 Operation modes:\n\
 113   -h, --help      display this help and exit\n\
 114   -V, --version   output version information and exit\n\
 115   -y, --yacc      emulate POSIX yacc\n"), stream);
 116   putc ('\n', stream);
 117
 118   fputs (_("\
 119 Parser:\n\
 120   -S, --skeleton=FILE        specify the skeleton to use\n\
 121   -t, --debug                instrument the parser for debugging\n\
 122       --locations            enable locations computation\n\
 123   -p, --name-prefix=PREFIX   prepend PREFIX to the external symbols\n\
 124   -l, --no-lines             don't generate `#line' directives\n\
 125   -n, --no-parser            generate the tables only\n\
 126   -k, --token-table          include a table of token names\n\
 127 "), stream);
 128   putc ('\n', stream);
 129
 130   fputs (_("\
 131 Output:\n\
 132   -d, --defines              also produce a header file\n\
 133   -r, --report=THINGS        also produce details on the automaton\n\
 134   -v, --verbose              same as `--report=state'\n\
 135   -b, --file-prefix=PREFIX   specify a PREFIX for output files\n\
 136   -o, --output=FILE          leave output to FILE\n\
 137   -g, --graph                also produce a VCG description of the automaton\n\
 138 \n\
 139 THINGS is a list of comma separated words that can include:\n\
 140   `state'        describe the states\n\
 141   `itemset'      complete the core item sets with their closure\n\
 142   `lookahead'    explicitly associate lookaheads to items\n\
 143   `all'          include all the above information\n\
 144   `none'         disable the report\n\
 145 "), stream);
 146   putc ('\n', stream);
 147
 148   fputs (_("\
 149 Report bugs to <bug-bison@gnu.org>.\n"), stream);
 150 }
 151
 152
 153 /*------------------------------.
 154 | Display the version message.  |
 155 `------------------------------*/
 156
 157 static void
 158 version (FILE *stream)
 159 {
 160   /* Some efforts were made to ease the translators' task, please
 161      continue.  */
 162   fprintf (stream, _("bison (GNU Bison) %s"), VERSION);
 163   putc ('\n', stream);
 164   fputs (_("Written by Robert Corbett and Richard Stallman.\n"), stream);
 165   putc ('\n', stream);
 166
 167   fprintf (stream,
 168            _("Copyright (C) %d Free Software Foundation, Inc.\n"), 2002);
 169
 170   fputs (_("\
 171 This is free software; see the source for copying conditions.  There is NO\n\
 172 warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\
 173 "),
 174          stream);
 175 }
 176
 177
 178 /*----------------------.
 179 | Process the options.  |
 180 `----------------------*/
 181
 182 /* Under DOS, there is no difference on the case.  This can be
 183    troublesome when looking for `.tab' etc.  */
 184 #ifdef MSDOS
 185 # define AS_FILE_NAME(File) (strlwr (File), (File))
 186 #else
 187 # define AS_FILE_NAME(File) (File)
 188 #endif
 189
 190 void
 191 getargs (int argc, char *argv[])
 192 {
 193   int c;
 194
 195   struct option *longopts = long_option_table_new ();
 196   while ((c = getopt_long (argc, argv, shortopts, longopts, NULL)) != EOF)
 197     switch (c)
 198       {
 199       case 0:
 200         /* Certain long options cause getopt_long to return 0.  */
 201         break;
 202
 203       case 'y':
 204         yacc_flag = 1;
 205         break;
 206
 207       case 'h':
 208         usage (stdout);
 209         exit (0);
 210
 211       case 'V':
 212         version (stdout);
 213         exit (0);
 214
 215       case 'g':
 216         /* Here, the -g and --graph=FILE options are differentiated.  */
 217         graph_flag = 1;
 218         spec_graph_file = AS_FILE_NAME (optarg);
 219         break;
 220
 221       case 'v':
 222         report_flag |= report_states;
 223         break;
 224
 225       case 'S':
 226         skeleton = AS_FILE_NAME (optarg);
 227         break;
 228
 229       case 'I':
 230         include = AS_FILE_NAME (optarg);
 231         break;
 232
 233       case 'd':
 234         /* Here, the -d and --defines options are differentiated.  */
 235         defines_flag = 1;
 236         if (optarg)
 237           spec_defines_file = AS_FILE_NAME (optarg);
 238         break;
 239
 240       case 'l':
 241         no_lines_flag = 1;
 242         break;
 243
 244       case 'k':
 245         token_table_flag = 1;
 246         break;
 247
 248       case 'n':
 249         no_parser_flag = 1;
 250         break;
 251
 252       case 't':
 253         debug_flag = 1;
 254         break;
 255
 256       case 'o':
 257         spec_outfile = AS_FILE_NAME (optarg);
 258         break;
 259
 260       case 'b':
 261         spec_file_prefix = AS_FILE_NAME (optarg);
 262         break;
 263
 264       case 'p':
 265         spec_name_prefix = optarg;
 266         break;
 267
 268       case 'r':
 269         report_argmatch (optarg);
 270         break;
 271
 272       default:
 273         fprintf (stderr, _("Try `%s --help' for more information.\n"),
 274                  program_name);
 275         exit (1);
 276       }
 277
 278   free (longopts);
 279
 280   if (optind == argc)
 281     {
 282       fprintf (stderr, _("%s: no grammar file given\n"), program_name);
 283       exit (1);
 284     }
 285   if (optind < argc - 1)
 286     fprintf (stderr, _("%s: extra arguments ignored after `%s'\n"),
 287              program_name, argv[optind]);
 288
 289   infile = argv[optind];
 290 }