src/getargs.c

   1 /* Parse command line arguments for Bison.
   2
   3    Copyright (C) 1984, 1986, 1989, 1992, 2000-2010 Free Software
   4    Foundation, Inc.
   5
   6    This file is part of Bison, the GNU Compiler Compiler.
   7
   8    This program is free software: you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation, either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  20
  21 #include <config.h>
  22 #include "system.h"
  23 #include "output.h"
  24
  25 #include <argmatch.h>
  26 #include <c-strcase.h>
  27 #include <configmake.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 xml_flag;
  52 bool locations_flag;
  53 bool no_lines_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
  62 int report_flag = report_none;
  63 int trace_flag = trace_none;
  64 int warnings_flag = warnings_none;
  65
  66 static struct bison_language const valid_languages[] = {
  67   { "c", "c-skel.m4", ".c", ".h", true },
  68   { "c++", "c++-skel.m4", ".cc", ".hh", true },
  69   { "java", "java-skel.m4", ".java", ".java", false },
  70   { "", "", "", "", false }
  71 };
  72
  73 int skeleton_prio = default_prio;
  74 const char *skeleton = NULL;
  75 int language_prio = default_prio;
  76 struct bison_language const *language = &valid_languages[0];
  77 const char *include = NULL;
  78
  79 char *program_name;
  80
  81
  82 /** Decode an option's set of keys.
  83  *
  84  *  \param option   option being decoded.
  85  *  \param keys     array of valid subarguments.
  86  *  \param values   array of corresponding (int) values.
  87  *  \param flags    the flags to update
  88  *  \param args     colon separated list of effective subarguments to decode.
  89  *                  If 0, then activate all the flags.
  90  *
  91  *  The special value 0 resets the flags to 0.
  92  */
  93 static void
  94 flags_argmatch (const char *option,
  95                 const char * const keys[], const int values[],
  96                 int *flags, char *args)
  97 {
  98   if (args)
  99     {
 100       args = strtok (args, ",");
 101       while (args)
 102         {
 103           int value = XARGMATCH (option, args, keys, values);
 104           if (value == 0)
 105             *flags = 0;
 106           else
 107             *flags |= value;
 108           args = strtok (NULL, ",");
 109         }
 110     }
 111   else
 112     *flags = ~0;
 113 }
 114
 115 /** Decode a set of sub arguments.
 116  *
 117  *  \param FlagName  the flag familly to update.
 118  *  \param Args      the effective sub arguments to decode.
 119  *
 120  *  \arg FlagName_args   the list of keys.
 121  *  \arg FlagName_types  the list of values.
 122  *  \arg FlagName_flag   the flag to update.
 123  */
 124 #define FLAGS_ARGMATCH(FlagName, Args)                                  \
 125   flags_argmatch ("--" #FlagName, FlagName ## _args, FlagName ## _types, \
 126                   &FlagName ## _flag, Args)
 127
 128
 129 /*----------------------.
 130 | --report's handling.  |
 131 `----------------------*/
 132
 133 static const char * const report_args[] =
 134 {
 135   /* In a series of synonyms, present the most meaningful first, so
 136      that argmatch_valid be more readable.  */
 137   "none",
 138   "state", "states",
 139   "itemset", "itemsets",
 140   "lookahead", "lookaheads", "look-ahead",
 141   "solved",
 142   "all",
 143   0
 144 };
 145
 146 static const int report_types[] =
 147 {
 148   report_none,
 149   report_states, report_states,
 150   report_states | report_itemsets, report_states | report_itemsets,
 151   report_states | report_lookahead_tokens,
 152   report_states | report_lookahead_tokens,
 153   report_states | report_lookahead_tokens,
 154   report_states | report_solved_conflicts,
 155   report_all
 156 };
 157
 158 ARGMATCH_VERIFY (report_args, report_types);
 159
 160
 161 /*---------------------.
 162 | --trace's handling.  |
 163 `---------------------*/
 164
 165 static const char * const trace_args[] =
 166 {
 167   /* In a series of synonyms, present the most meaningful first, so
 168      that argmatch_valid be more readable.  */
 169   "none       - no traces",
 170   "scan       - grammar scanner traces",
 171   "parse      - grammar parser traces",
 172   "automaton  - construction of the automaton",
 173   "bitsets    - use of bitsets",
 174   "grammar    - reading, reducing the grammar",
 175   "resource   - memory consumption (where available)",
 176   "sets       - grammar sets: firsts, nullable etc.",
 177   "tools      - m4 invocation",
 178   "m4         - m4 traces",
 179   "skeleton   - skeleton postprocessing",
 180   "time       - time consumption",
 181   "all        - all of the above",
 182   0
 183 };
 184
 185 static const int trace_types[] =
 186 {
 187   trace_none,
 188   trace_scan,
 189   trace_parse,
 190   trace_automaton,
 191   trace_bitsets,
 192   trace_grammar,
 193   trace_resource,
 194   trace_sets,
 195   trace_tools,
 196   trace_m4,
 197   trace_skeleton,
 198   trace_time,
 199   trace_all
 200 };
 201
 202 ARGMATCH_VERIFY (trace_args, trace_types);
 203
 204
 205 /*------------------------.
 206 | --warnings's handling.  |
 207 `------------------------*/
 208
 209 static const char * const warnings_args[] =
 210 {
 211   /* In a series of synonyms, present the most meaningful first, so
 212      that argmatch_valid be more readable.  */
 213   "none            - no warnings",
 214   "midrule-values  - unset or unused midrule values",
 215   "yacc            - incompatibilities with POSIX YACC",
 216   "all             - all of the above",
 217   "error           - warnings are errors",
 218   0
 219 };
 220
 221 static const int warnings_types[] =
 222 {
 223   warnings_none,
 224   warnings_midrule_values,
 225   warnings_yacc,
 226   warnings_all,
 227   warnings_error
 228 };
 229
 230 ARGMATCH_VERIFY (warnings_args, warnings_types);
 231
 232
 233 /*-------------------------------------------.
 234 | Display the help message and exit STATUS.  |
 235 `-------------------------------------------*/
 236
 237 static void usage (int) ATTRIBUTE_NORETURN;
 238
 239 static void
 240 usage (int status)
 241 {
 242   if (status != 0)
 243     fprintf (stderr, _("Try `%s --help' for more information.\n"),
 244              program_name);
 245   else
 246     {
 247       printf (_("Usage: %s [OPTION]... FILE\n"), program_name);
 248       fputs (_("\
 249 Generate LALR(1) and GLR parsers.\n\
 250 \n\
 251 "), stdout);
 252
 253       fputs (_("\
 254 Mandatory arguments to long options are mandatory for short options too.\n\
 255 "), stdout);
 256       fputs (_("\
 257 The same is true for optional arguments.\n\
 258 "), stdout);
 259
 260       fputs (_("\
 261 \n\
 262 Operation modes:\n\
 263   -h, --help                 display this help and exit\n\
 264   -V, --version              output version information and exit\n\
 265       --print-localedir      output directory containing locale-dependent data\n\
 266       --print-datadir        output directory containing skeletons and XSLT\n\
 267   -y, --yacc                 emulate POSIX Yacc\n\
 268   -W, --warnings[=CATEGORY]  report the warnings falling in CATEGORY\n\
 269 \n\
 270 "), stdout);
 271
 272       fputs (_("\
 273 Parser:\n\
 274   -L, --language=LANGUAGE    specify the output programming language\n\
 275                              (this is an experimental feature)\n\
 276   -S, --skeleton=FILE        specify the skeleton to use\n\
 277   -t, --debug                instrument the parser for debugging\n\
 278       --locations            enable locations computation\n\
 279   -p, --name-prefix=PREFIX   prepend PREFIX to the external symbols\n\
 280   -l, --no-lines             don't generate `#line' directives\n\
 281   -k, --token-table          include a table of token names\n\
 282 \n\
 283 "), stdout);
 284
 285       /* Keep -d and --defines separate so that ../build-aux/cross-options.pl
 286        * won't assume that -d also takes an argument.  */
 287       fputs (_("\
 288 Output:\n\
 289       --defines[=FILE]       also produce a header file\n\
 290   -d                         likewise but cannot specify FILE (for POSIX Yacc)\n\
 291   -r, --report=THINGS        also produce details on the automaton\n\
 292       --report-file=FILE     write report to FILE\n\
 293   -v, --verbose              same as `--report=state'\n\
 294   -b, --file-prefix=PREFIX   specify a PREFIX for output files\n\
 295   -o, --output=FILE          leave output to FILE\n\
 296   -g, --graph[=FILE]         also output a graph of the automaton\n\
 297   -x, --xml[=FILE]           also output an XML report of the automaton\n\
 298                              (the XML schema is experimental)\n\
 299 \n\
 300 "), stdout);
 301
 302       fputs (_("\
 303 Warning categories include:\n\
 304   `midrule-values'  unset or unused midrule values\n\
 305   `yacc'            incompatibilities with POSIX YACC\n\
 306   `all'             all the warnings\n\
 307   `no-CATEGORY'     turn off warnings in CATEGORY\n\
 308   `none'            turn off all the warnings\n\
 309   `error'           treat warnings as errors\n\
 310 \n\
 311 "), stdout);
 312
 313       fputs (_("\
 314 THINGS is a list of comma separated words that can include:\n\
 315   `state'        describe the states\n\
 316   `itemset'      complete the core item sets with their closure\n\
 317   `lookahead'    explicitly associate lookahead tokens to items\n\
 318   `solved'       describe shift/reduce conflicts solving\n\
 319   `all'          include all the above information\n\
 320   `none'         disable the report\n\
 321 "), stdout);
 322
 323       printf (_("\nReport bugs to <%s>.\n"), PACKAGE_BUGREPORT);
 324     }
 325
 326   exit (status);
 327 }
 328
 329
 330 /*------------------------------.
 331 | Display the version message.  |
 332 `------------------------------*/
 333
 334 static void
 335 version (void)
 336 {
 337   /* Some efforts were made to ease the translators' task, please
 338      continue.  */
 339   printf (_("bison (GNU Bison) %s"), VERSION);
 340   putc ('\n', stdout);
 341   fputs (_("Written by Robert Corbett and Richard Stallman.\n"), stdout);
 342   putc ('\n', stdout);
 343
 344   fprintf (stdout,
 345            _("Copyright (C) %d Free Software Foundation, Inc.\n"),
 346            PACKAGE_COPYRIGHT_YEAR);
 347
 348   fputs (_("\
 349 This is free software; see the source for copying conditions.  There is NO\n\
 350 warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\
 351 "),
 352          stdout);
 353 }
 354
 355
 356 /*-------------------------------------.
 357 | --skeleton and --language handling.  |
 358 `--------------------------------------*/
 359
 360 void
 361 skeleton_arg (char const *arg, int prio, location const *loc)
 362 {
 363   if (prio < skeleton_prio)
 364     {
 365       skeleton_prio = prio;
 366       skeleton = arg;
 367     }
 368   else if (prio == skeleton_prio)
 369     {
 370       char const *msg =
 371         _("multiple skeleton declarations are invalid");
 372       if (loc)
 373         complain_at (*loc, msg);
 374       else
 375         complain (msg);
 376     }
 377 }
 378
 379 void
 380 language_argmatch (char const *arg, int prio, location const *loc)
 381 {
 382   char const *msg;
 383
 384   if (prio < language_prio)
 385     {
 386       int i;
 387       for (i = 0; valid_languages[i].language[0]; i++)
 388         if (c_strcasecmp (arg, valid_languages[i].language) == 0)
 389           {
 390             language_prio = prio;
 391             language = &valid_languages[i];
 392             return;
 393           }
 394       msg = _("invalid language `%s'");
 395     }
 396   else if (language_prio == prio)
 397     msg = _("multiple language declarations are invalid");
 398   else
 399     return;
 400
 401   if (loc)
 402     complain_at (*loc, msg, arg);
 403   else
 404     complain (msg, arg);
 405 }
 406
 407 /*----------------------.
 408 | Process the options.  |
 409 `----------------------*/
 410
 411 /* Shorts options.
 412    Should be computed from long_options.  */
 413 static char const short_options[] =
 414   "L:"
 415   "S:"
 416   "T::"
 417   "V"
 418   "W::"
 419   "b:"
 420   "d"
 421   "e"
 422   "g::"
 423   "h"
 424   "k"
 425   "l"
 426   "n"
 427   "o:"
 428   "p:"
 429   "r:"
 430   "t"
 431   "v"
 432   "x::"
 433   "y"
 434   ;
 435
 436 /* Values for long options that do not have single-letter equivalents.  */
 437 enum
 438 {
 439   LOCATIONS_OPTION = CHAR_MAX + 1,
 440   PRINT_LOCALEDIR_OPTION,
 441   PRINT_DATADIR_OPTION,
 442   REPORT_FILE_OPTION
 443 };
 444
 445 static struct option const long_options[] =
 446 {
 447   /* Operation modes. */
 448   { "help",            no_argument,       0,   'h' },
 449   { "version",         no_argument,       0,   'V' },
 450   { "print-localedir", no_argument,       0,   PRINT_LOCALEDIR_OPTION },
 451   { "print-datadir",   no_argument,       0,   PRINT_DATADIR_OPTION   },
 452   { "warnings",        optional_argument, 0,   'W' },
 453
 454   /* Parser. */
 455   { "name-prefix",   required_argument,   0,   'p' },
 456   { "include",       required_argument,   0,   'I' },
 457
 458   /* Output. */
 459   { "file-prefix", required_argument,   0,   'b' },
 460   { "output",      required_argument,   0,   'o' },
 461   { "output-file", required_argument,   0,   'o' },
 462   { "graph",       optional_argument,   0,   'g' },
 463   { "xml",         optional_argument,   0,   'x' },
 464   { "report",      required_argument,   0,   'r' },
 465   { "report-file", required_argument,   0,   REPORT_FILE_OPTION },
 466   { "verbose",     no_argument,         0,   'v' },
 467
 468   /* Hidden. */
 469   { "trace",         optional_argument,   0,     'T' },
 470
 471   /* Output.  */
 472   { "defines",     optional_argument,   0,   'd' },
 473
 474   /* Operation modes.  */
 475   { "fixed-output-files", no_argument,  0,   'y' },
 476   { "yacc",               no_argument,  0,   'y' },
 477
 478   /* Parser.  */
 479   { "debug",          no_argument,               0,   't' },
 480   { "locations",      no_argument,               0, LOCATIONS_OPTION },
 481   { "no-lines",       no_argument,               0,   'l' },
 482   { "raw",            no_argument,               0,     0 },
 483   { "skeleton",       required_argument,         0,   'S' },
 484   { "language",       required_argument,         0,   'L' },
 485   { "token-table",    no_argument,               0,   'k' },
 486
 487   {0, 0, 0, 0}
 488 };
 489
 490 /* Under DOS, there is no difference on the case.  This can be
 491    troublesome when looking for `.tab' etc.  */
 492 #ifdef MSDOS
 493 # define AS_FILE_NAME(File) (strlwr (File), (File))
 494 #else
 495 # define AS_FILE_NAME(File) (File)
 496 #endif
 497
 498 void
 499 getargs (int argc, char *argv[])
 500 {
 501   int c;
 502
 503   while ((c = getopt_long (argc, argv, short_options, long_options, NULL))
 504          != -1)
 505     switch (c)
 506       {
 507       case 0:
 508         /* Certain long options cause getopt_long to return 0.  */
 509         break;
 510
 511       case 'd':
 512         /* Here, the -d and --defines options are differentiated.  */
 513         defines_flag = true;
 514         if (optarg)
 515           spec_defines_file = xstrdup (AS_FILE_NAME (optarg));
 516         break;
 517
 518       case 'I':
 519         include = AS_FILE_NAME (optarg);
 520         break;
 521
 522       case 'L':
 523         language_argmatch (optarg, command_line_prio, NULL);
 524         break;
 525
 526       case 'S':
 527         skeleton_arg (AS_FILE_NAME (optarg), command_line_prio, NULL);
 528         break;
 529
 530       case 'T':
 531         FLAGS_ARGMATCH (trace, optarg);
 532         break;
 533
 534       case 'V':
 535         version ();
 536         exit (EXIT_SUCCESS);
 537
 538       case 'W':
 539         if (optarg)
 540           FLAGS_ARGMATCH (warnings, optarg);
 541         else
 542           warnings_flag |= warnings_all;
 543         break;
 544
 545       case 'b':
 546         spec_file_prefix = AS_FILE_NAME (optarg);
 547         break;
 548
 549       case 'g':
 550         graph_flag = true;
 551         if (optarg)
 552           spec_graph_file = xstrdup (AS_FILE_NAME (optarg));
 553         break;
 554
 555       case 'h':
 556         usage (EXIT_SUCCESS);
 557
 558       case 'k':
 559         token_table_flag = true;
 560         break;
 561
 562       case 'l':
 563         no_lines_flag = true;
 564         break;
 565
 566       case 'o':
 567         spec_outfile = AS_FILE_NAME (optarg);
 568         break;
 569
 570       case 'p':
 571         spec_name_prefix = optarg;
 572         break;
 573
 574       case 'r':
 575         FLAGS_ARGMATCH (report, optarg);
 576         break;
 577
 578       case 't':
 579         debug_flag = true;
 580         break;
 581
 582       case 'v':
 583         report_flag |= report_states;
 584         break;
 585
 586       case 'x':
 587         xml_flag = true;
 588         if (optarg)
 589           spec_xml_file = xstrdup (AS_FILE_NAME (optarg));
 590         break;
 591
 592       case 'y':
 593         yacc_flag = true;
 594         break;
 595
 596       case LOCATIONS_OPTION:
 597         locations_flag = true;
 598         break;
 599
 600       case PRINT_LOCALEDIR_OPTION:
 601         printf ("%s\n", LOCALEDIR);
 602         exit (EXIT_SUCCESS);
 603
 604       case PRINT_DATADIR_OPTION:
 605         printf ("%s\n", compute_pkgdatadir ());
 606         exit (EXIT_SUCCESS);
 607
 608       case REPORT_FILE_OPTION:
 609         spec_verbose_file = xstrdup (AS_FILE_NAME (optarg));
 610         break;
 611
 612       default:
 613         usage (EXIT_FAILURE);
 614       }
 615
 616   if (argc - optind != 1)
 617     {
 618       if (argc - optind < 1)
 619         error (0, 0, _("missing operand after `%s'"), argv[argc - 1]);
 620       else
 621         error (0, 0, _("extra operand `%s'"), argv[optind + 1]);
 622       usage (EXIT_FAILURE);
 623     }
 624
 625   current_file = grammar_file = uniqstr_new (argv[optind]);
 626 }