src/getargs.c

   1 /* Parse command line arguments for Bison.
   2
   3    Copyright (C) 1984, 1986, 1989, 1992, 2000, 2001, 2002, 2003, 2004,
   4    2005, 2006 Free Software Foundation, Inc.
   5
   6    This file is part of Bison, the GNU Compiler Compiler.
   7
   8    Bison is free software; you can redistribute it and/or modify it
   9    under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2, or (at your option)
  11    any later version.
  12
  13    Bison is distributed in the hope that it will be useful, but
  14    WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16    General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with Bison; see the file COPYING.  If not, write to the Free
  20    Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  21    02110-1301, USA.  */
  22
  23 #include <config.h>
  24 #include "system.h"
  25 #include "revision.h"
  26
  27 #include <argmatch.h>
  28 #include <error.h>
  29
  30 /* Hack to get <getopt.h> to declare getopt with a prototype.  */
  31 #if lint && ! defined __GNU_LIBRARY__
  32 # define __GNU_LIBRARY__
  33 # define HACK_FOR___GNU_LIBRARY___PROTOTYPE 1
  34 #endif
  35
  36 #include <getopt.h>
  37
  38 #ifdef HACK_FOR___GNU_LIBRARY___PROTOTYPE
  39 # undef __GNU_LIBRARY__
  40 # undef HACK_FOR___GNU_LIBRARY___PROTOTYPE
  41 #endif
  42
  43 #include "complain.h"
  44 #include "files.h"
  45 #include "getargs.h"
  46 #include "uniqstr.h"
  47
  48 bool debug_flag;
  49 bool defines_flag;
  50 bool graph_flag;
  51 bool locations_flag;
  52 bool no_lines_flag;
  53 bool no_parser_flag;
  54 bool token_table_flag;
  55 bool yacc_flag; /* for -y */
  56
  57 bool error_verbose = false;
  58
  59 bool nondeterministic_parser = false;
  60 bool glr_parser = false;
  61 bool pure_parser = false;
  62
  63 int report_flag = report_none;
  64 int trace_flag = trace_none;
  65
  66 const char *skeleton = NULL;
  67 const char *include = NULL;
  68
  69 extern char *program_name;
  70
  71
  72 /*---------------------.
  73 | --trace's handling.  |
  74 `---------------------*/
  75
  76 static const char * const trace_args[] =
  77 {
  78   /* In a series of synonyms, present the most meaningful first, so
  79      that argmatch_valid be more readable.  */
  80   "none       - no report",
  81   "scan       - grammar scanner traces",
  82   "parse      - grammar parser traces",
  83   "automaton  - contruction of the automaton",
  84   "bitsets    - use of bitsets",
  85   "grammar    - reading, reducing of the grammar",
  86   "resource   - memory consumption (where available)",
  87   "sets       - grammar sets: firsts, nullable etc.",
  88   "tools      - m4 invocation",
  89   "m4         - m4 traces",
  90   "skeleton   - skeleton postprocessing",
  91   "time       - time consumption",
  92   "all        - all of the above",
  93   0
  94 };
  95
  96 static const int trace_types[] =
  97 {
  98   trace_none,
  99   trace_scan,
 100   trace_parse,
 101   trace_automaton,
 102   trace_bitsets,
 103   trace_grammar,
 104   trace_resource,
 105   trace_sets,
 106   trace_tools,
 107   trace_m4,
 108   trace_skeleton,
 109   trace_time,
 110   trace_all
 111 };
 112
 113 ARGMATCH_VERIFY (trace_args, trace_types);
 114
 115 static void
 116 trace_argmatch (char *args)
 117 {
 118   if (args)
 119     {
 120       args = strtok (args, ",");
 121       do
 122         {
 123           int trace = XARGMATCH ("--trace", args,
 124                                  trace_args, trace_types);
 125           if (trace == trace_none)
 126             trace_flag = trace_none;
 127           else
 128             trace_flag |= trace;
 129         }
 130       while ((args = strtok (NULL, ",")));
 131     }
 132   else
 133     trace_flag = trace_all;
 134 }
 135
 136
 137 /*----------------------.
 138 | --report's handling.  |
 139 `----------------------*/
 140
 141 static const char * const report_args[] =
 142 {
 143   /* In a series of synonyms, present the most meaningful first, so
 144      that argmatch_valid be more readable.  */
 145   "none",
 146   "state", "states",
 147   "itemset", "itemsets",
 148   "look-ahead", "lookahead", "lookaheads",
 149   "solved",
 150   "all",
 151   0
 152 };
 153
 154 static const int report_types[] =
 155 {
 156   report_none,
 157   report_states, report_states,
 158   report_states | report_itemsets, report_states | report_itemsets,
 159   report_states | report_look_ahead_tokens,
 160   report_states | report_look_ahead_tokens,
 161   report_states | report_look_ahead_tokens,
 162   report_states | report_solved_conflicts,
 163   report_all
 164 };
 165
 166 ARGMATCH_VERIFY (report_args, report_types);
 167
 168 static void
 169 report_argmatch (char *args)
 170 {
 171   args = strtok (args, ",");
 172   do
 173     {
 174       int report = XARGMATCH ("--report", args,
 175                               report_args, report_types);
 176       if (report == report_none)
 177         report_flag = report_none;
 178       else
 179         report_flag |= report;
 180     }
 181   while ((args = strtok (NULL, ",")));
 182 }
 183
 184
 185 /*-------------------------------------------.
 186 | Display the help message and exit STATUS.  |
 187 `-------------------------------------------*/
 188
 189 static void usage (int) ATTRIBUTE_NORETURN;
 190
 191 static void
 192 usage (int status)
 193 {
 194   if (status != 0)
 195     fprintf (stderr, _("Try `%s --help' for more information.\n"),
 196              program_name);
 197   else
 198     {
 199       /* Some efforts were made to ease the translators' task, please
 200          continue.  */
 201       fputs (_("\
 202 GNU bison generates parsers for LALR(1) grammars.\n"), stdout);
 203       putc ('\n', stdout);
 204
 205       fprintf (stdout, _("\
 206 Usage: %s [OPTION]... FILE\n"), program_name);
 207       putc ('\n', stdout);
 208
 209       fputs (_("\
 210 If a long option shows an argument as mandatory, then it is mandatory\n\
 211 for the equivalent short option also.  Similarly for optional arguments.\n"),
 212              stdout);
 213       putc ('\n', stdout);
 214
 215       fputs (_("\
 216 Operation modes:\n\
 217   -h, --help                 display this help and exit\n\
 218   -V, --version              output version information and exit\n\
 219       --print-localedir      output directory containing locale-dependent data\n\
 220   -y, --yacc                 emulate POSIX yacc\n"), stdout);
 221       putc ('\n', stdout);
 222
 223       fputs (_("\
 224 Parser:\n\
 225   -S, --skeleton=FILE        specify the skeleton to use\n\
 226   -t, --debug                instrument the parser for debugging\n\
 227       --locations            enable locations computation\n\
 228   -p, --name-prefix=PREFIX   prepend PREFIX to the external symbols\n\
 229   -l, --no-lines             don't generate `#line' directives\n\
 230   -n, --no-parser            generate the tables only\n\
 231   -k, --token-table          include a table of token names\n\
 232 "), stdout);
 233       putc ('\n', stdout);
 234
 235       fputs (_("\
 236 Output:\n\
 237   -d, --defines              also produce a header file\n\
 238   -r, --report=THINGS        also produce details on the automaton\n\
 239   -v, --verbose              same as `--report=state'\n\
 240   -b, --file-prefix=PREFIX   specify a PREFIX for output files\n\
 241   -o, --output=FILE          leave output to FILE\n\
 242   -g, --graph                also produce a VCG description of the automaton\n\
 243 "), stdout);
 244       putc ('\n', stdout);
 245
 246       fputs (_("\
 247 THINGS is a list of comma separated words that can include:\n\
 248   `state'        describe the states\n\
 249   `itemset'      complete the core item sets with their closure\n\
 250   `look-ahead'   explicitly associate look-ahead tokens to items\n\
 251   `solved'       describe shift/reduce conflicts solving\n\
 252   `all'          include all the above information\n\
 253   `none'         disable the report\n\
 254 "), stdout);
 255       putc ('\n', stdout);
 256
 257       fputs (_("\
 258 Report bugs to <bug-bison@gnu.org>.\n"), stdout);
 259     }
 260
 261   exit (status);
 262 }
 263
 264
 265 /*------------------------------.
 266 | Display the version message.  |
 267 `------------------------------*/
 268
 269 static void
 270 version (void)
 271 {
 272   /* Some efforts were made to ease the translators' task, please
 273      continue.  */
 274   printf (_("bison (GNU Bison) %s"), VERSION);
 275   putc ('\n', stdout);
 276   printf ("%s", revision);
 277   fputs (_("Written by Robert Corbett and Richard Stallman.\n"), stdout);
 278   putc ('\n', stdout);
 279
 280   fprintf (stdout,
 281            _("Copyright (C) %d Free Software Foundation, Inc.\n"), 2006);
 282
 283   fputs (_("\
 284 This is free software; see the source for copying conditions.  There is NO\n\
 285 warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\
 286 "),
 287          stdout);
 288 }
 289
 290
 291 /*----------------------.
 292 | Process the options.  |
 293 `----------------------*/
 294
 295 /* Shorts options.  */
 296 static char const short_options[] = "yvegdhr:ltknVo:b:p:S:T::";
 297
 298 /* Values for long options that do not have single-letter equivalents.  */
 299 enum
 300 {
 301   LOCATIONS_OPTION = CHAR_MAX + 1,
 302   PRINT_LOCALEDIR_OPTION
 303 };
 304
 305 static struct option const long_options[] =
 306 {
 307   /* Operation modes. */
 308   { "help",            no_argument,     0,   'h' },
 309   { "version",         no_argument,     0,   'V' },
 310   { "print-localedir", no_argument,     0,   PRINT_LOCALEDIR_OPTION },
 311
 312   /* Parser. */
 313   { "name-prefix",   required_argument,   0,   'p' },
 314   { "include",       required_argument,   0,   'I' },
 315
 316   /* Output. */
 317   { "file-prefix", required_argument,   0,   'b' },
 318   { "output",      required_argument,   0,   'o' },
 319   { "output-file", required_argument,   0,   'o' },
 320   { "graph",       optional_argument,   0,   'g' },
 321   { "report",      required_argument,   0,   'r' },
 322   { "verbose",     no_argument,         0,   'v' },
 323
 324   /* Hidden. */
 325   { "trace",         optional_argument,   0,     'T' },
 326
 327   /* Output.  */
 328   { "defines",     optional_argument,   0,   'd' },
 329
 330   /* Operation modes.  */
 331   { "fixed-output-files", no_argument,  0,   'y' },
 332   { "yacc",               no_argument,  0,   'y' },
 333
 334   /* Parser.  */
 335   { "debug",          no_argument,               0,   't' },
 336   { "locations",      no_argument,               0, LOCATIONS_OPTION },
 337   { "no-lines",       no_argument,               0,   'l' },
 338   { "no-parser",      no_argument,               0,   'n' },
 339   { "raw",            no_argument,               0,     0 },
 340   { "skeleton",       required_argument,         0,   'S' },
 341   { "token-table",    no_argument,               0,   'k' },
 342
 343   {0, 0, 0, 0}
 344 };
 345
 346 /* Under DOS, there is no difference on the case.  This can be
 347    troublesome when looking for `.tab' etc.  */
 348 #ifdef MSDOS
 349 # define AS_FILE_NAME(File) (strlwr (File), (File))
 350 #else
 351 # define AS_FILE_NAME(File) (File)
 352 #endif
 353
 354 void
 355 getargs (int argc, char *argv[])
 356 {
 357   int c;
 358
 359   while ((c = getopt_long (argc, argv, short_options, long_options, NULL))
 360          != -1)
 361     switch (c)
 362       {
 363       case 0:
 364         /* Certain long options cause getopt_long to return 0.  */
 365         break;
 366
 367       case 'y':
 368         yacc_flag = true;
 369         break;
 370
 371       case 'h':
 372         usage (EXIT_SUCCESS);
 373
 374       case 'V':
 375         version ();
 376         exit (EXIT_SUCCESS);
 377
 378       case PRINT_LOCALEDIR_OPTION:
 379         printf ("%s\n", LOCALEDIR);
 380         exit (EXIT_SUCCESS);
 381
 382       case 'g':
 383         /* Here, the -g and --graph=FILE options are differentiated.  */
 384         graph_flag = true;
 385         if (optarg)
 386           spec_graph_file = AS_FILE_NAME (optarg);
 387         break;
 388
 389       case 'v':
 390         report_flag |= report_states;
 391         break;
 392
 393       case 'S':
 394         skeleton = AS_FILE_NAME (optarg);
 395         break;
 396
 397       case 'I':
 398         include = AS_FILE_NAME (optarg);
 399         break;
 400
 401       case 'd':
 402         /* Here, the -d and --defines options are differentiated.  */
 403         defines_flag = true;
 404         if (optarg)
 405           spec_defines_file = AS_FILE_NAME (optarg);
 406         break;
 407
 408       case 'l':
 409         no_lines_flag = true;
 410         break;
 411
 412       case LOCATIONS_OPTION:
 413         locations_flag = true;
 414         break;
 415
 416       case 'k':
 417         token_table_flag = true;
 418         break;
 419
 420       case 'n':
 421         no_parser_flag = true;
 422         break;
 423
 424       case 't':
 425         debug_flag = true;
 426         break;
 427
 428       case 'o':
 429         spec_outfile = AS_FILE_NAME (optarg);
 430         break;
 431
 432       case 'b':
 433         spec_file_prefix = AS_FILE_NAME (optarg);
 434         break;
 435
 436       case 'p':
 437         spec_name_prefix = optarg;
 438         break;
 439
 440       case 'r':
 441         report_argmatch (optarg);
 442         break;
 443
 444       case 'T':
 445         trace_argmatch (optarg);
 446         break;
 447
 448       default:
 449         usage (EXIT_FAILURE);
 450       }
 451
 452   if (argc - optind != 1)
 453     {
 454       if (argc - optind < 1)
 455         error (0, 0, _("missing operand after `%s'"), argv[argc - 1]);
 456       else
 457         error (0, 0, _("extra operand `%s'"), argv[optind + 1]);
 458       usage (EXIT_FAILURE);
 459     }
 460
 461   current_file = grammar_file = uniqstr_new (argv[optind]);
 462 }