src/getargs.c

   1 /* Parse command line arguments for Bison.
   2
   3    Copyright (C) 1984, 1986, 1989, 1992, 2000-2012 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 #include <quotearg.h>
  30
  31 /* Hack to get <getopt.h> to declare getopt with a prototype.  */
  32 #if lint && ! defined __GNU_LIBRARY__
  33 # define __GNU_LIBRARY__
  34 # define HACK_FOR___GNU_LIBRARY___PROTOTYPE 1
  35 #endif
  36
  37 #include <getopt.h>
  38
  39 #ifdef HACK_FOR___GNU_LIBRARY___PROTOTYPE
  40 # undef __GNU_LIBRARY__
  41 # undef HACK_FOR___GNU_LIBRARY___PROTOTYPE
  42 #endif
  43
  44 #include "complain.h"
  45 #include "files.h"
  46 #include "getargs.h"
  47 #include "muscle-tab.h"
  48 #include "uniqstr.h"
  49
  50 bool debug_flag;
  51 bool defines_flag;
  52 bool graph_flag;
  53 bool xml_flag;
  54 bool locations_flag;
  55 bool no_lines_flag;
  56 bool token_table_flag;
  57 bool yacc_flag; /* for -y */
  58
  59 bool error_verbose = false;
  60
  61 bool nondeterministic_parser = false;
  62 bool glr_parser = false;
  63
  64 int report_flag = report_none;
  65 int trace_flag = trace_none;
  66 int warnings_flag = warnings_conflicts_sr | warnings_conflicts_rr
  67                     | warnings_other;
  68
  69 static struct bison_language const valid_languages[] = {
  70   { "c", "c-skel.m4", ".c", ".h", true },
  71   { "c++", "c++-skel.m4", ".cc", ".hh", true },
  72   { "java", "java-skel.m4", ".java", ".java", false },
  73   { "", "", "", "", false }
  74 };
  75
  76 int skeleton_prio = default_prio;
  77 const char *skeleton = NULL;
  78 int language_prio = default_prio;
  79 struct bison_language const *language = &valid_languages[0];
  80 const char *include = NULL;
  81
  82 char *program_name;
  83
  84
  85 /** Decode an option's set of keys.
  86  *
  87  *  \param option   option being decoded.
  88  *  \param keys     array of valid subarguments.
  89  *  \param values   array of corresponding (int) values.
  90  *  \param all      the all value.
  91  *  \param flags    the flags to update
  92  *  \param args     comma separated list of effective subarguments to decode.
  93  *                  If 0, then activate all the flags.
  94  *
  95  *  If VALUE != 0 then KEY sets flags and no-KEY clears them.
  96  *  If VALUE == 0 then KEY clears all flags from \c all and no-KEY sets all
  97  *  flags from \c all.  Thus no-none = all and no-all = none.
  98  */
  99 static void
 100 flags_argmatch (const char *option,
 101                 const char * const keys[], const int values[],
 102                 int all, int *flags, char *args)
 103 {
 104   if (args)
 105     {
 106       args = strtok (args, ",");
 107       while (args)
 108         {
 109           int no = strncmp (args, "no-", 3) == 0 ? 3 : 0;
 110           int value = XARGMATCH (option, args + no, keys, values);
 111           if (value == 0)
 112             {
 113               if (no)
 114                 *flags |= all;
 115               else
 116                 *flags &= ~all;
 117             }
 118           else
 119             {
 120               if (no)
 121                 *flags &= ~value;
 122               else
 123                 *flags |= value;
 124             }
 125           args = strtok (NULL, ",");
 126         }
 127     }
 128   else
 129     *flags |= all;
 130 }
 131
 132 /** Decode a set of sub arguments.
 133  *
 134  *  \param FlagName  the flag familly to update.
 135  *  \param Args      the effective sub arguments to decode.
 136  *
 137  *  \arg FlagName_args   the list of keys.
 138  *  \arg FlagName_types  the list of values.
 139  *  \arg FlagName_all    the all value.
 140  *  \arg FlagName_flag   the flag to update.
 141  */
 142 #define FLAGS_ARGMATCH(FlagName, Args)                                  \
 143   flags_argmatch ("--" #FlagName, FlagName ## _args, FlagName ## _types, \
 144                   FlagName ## _all, &FlagName ## _flag, Args)
 145
 146
 147 /*----------------------.
 148 | --report's handling.  |
 149 `----------------------*/
 150
 151 static const char * const report_args[] =
 152 {
 153   /* In a series of synonyms, present the most meaningful first, so
 154      that argmatch_valid be more readable.  */
 155   "none",
 156   "state", "states",
 157   "itemset", "itemsets",
 158   "lookahead", "lookaheads", "look-ahead",
 159   "solved",
 160   "all",
 161   0
 162 };
 163
 164 static const int report_types[] =
 165 {
 166   report_none,
 167   report_states, report_states,
 168   report_states | report_itemsets, report_states | report_itemsets,
 169   report_states | report_lookahead_tokens,
 170   report_states | report_lookahead_tokens,
 171   report_states | report_lookahead_tokens,
 172   report_states | report_solved_conflicts,
 173   report_all
 174 };
 175
 176 ARGMATCH_VERIFY (report_args, report_types);
 177
 178
 179 /*---------------------.
 180 | --trace's handling.  |
 181 `---------------------*/
 182
 183 static const char * const trace_args[] =
 184 {
 185   /* In a series of synonyms, present the most meaningful first, so
 186      that argmatch_valid be more readable.  */
 187   "none       - no traces",
 188   "scan       - grammar scanner traces",
 189   "parse      - grammar parser traces",
 190   "automaton  - construction of the automaton",
 191   "bitsets    - use of bitsets",
 192   "grammar    - reading, reducing the grammar",
 193   "resource   - memory consumption (where available)",
 194   "sets       - grammar sets: firsts, nullable etc.",
 195   "muscles    - m4 definitions passed to the skeleton",
 196   "tools      - m4 invocation",
 197   "m4         - m4 traces",
 198   "skeleton   - skeleton postprocessing",
 199   "time       - time consumption",
 200   "ielr       - IELR conversion",
 201   "all        - all of the above",
 202   0
 203 };
 204
 205 static const int trace_types[] =
 206 {
 207   trace_none,
 208   trace_scan,
 209   trace_parse,
 210   trace_automaton,
 211   trace_bitsets,
 212   trace_grammar,
 213   trace_resource,
 214   trace_sets,
 215   trace_muscles,
 216   trace_tools,
 217   trace_m4,
 218   trace_skeleton,
 219   trace_time,
 220   trace_ielr,
 221   trace_all
 222 };
 223
 224 ARGMATCH_VERIFY (trace_args, trace_types);
 225
 226
 227 /*------------------------.
 228 | --warnings's handling.  |
 229 `------------------------*/
 230
 231 static const char * const warnings_args[] =
 232 {
 233   /* In a series of synonyms, present the most meaningful first, so
 234      that argmatch_valid be more readable.  */
 235   "none            - no warnings",
 236   "midrule-values  - unset or unused midrule values",
 237   "yacc            - incompatibilities with POSIX Yacc",
 238   "conflicts-sr    - S/R conflicts",
 239   "conflicts-rr    - R/R conflicts",
 240   "other           - all other warnings",
 241   "all             - all of the above",
 242   "error           - warnings are errors",
 243   0
 244 };
 245
 246 static const int warnings_types[] =
 247 {
 248   warnings_none,
 249   warnings_midrule_values,
 250   warnings_yacc,
 251   warnings_conflicts_sr,
 252   warnings_conflicts_rr,
 253   warnings_other,
 254   warnings_all,
 255   warnings_error
 256 };
 257
 258 ARGMATCH_VERIFY (warnings_args, warnings_types);
 259
 260
 261 /*-------------------------------------------.
 262 | Display the help message and exit STATUS.  |
 263 `-------------------------------------------*/
 264
 265 static void usage (int) ATTRIBUTE_NORETURN;
 266
 267 static void
 268 usage (int status)
 269 {
 270   if (status != 0)
 271     fprintf (stderr, _("Try `%s --help' for more information.\n"),
 272              program_name);
 273   else
 274     {
 275       /* For ../build-aux/cross-options.pl to work, use the format:
 276                 ^  -S, --long[=ARGS] (whitespace)
 277          A --long option is required.
 278          Otherwise, add exceptions to ../build-aux/cross-options.pl.  */
 279
 280       printf (_("Usage: %s [OPTION]... FILE\n"), program_name);
 281       fputs (_("\
 282 Generate a deterministic LR or generalized LR (GLR) parser employing\n\
 283 LALR(1), IELR(1), or canonical LR(1) parser tables.  IELR(1) and\n\
 284 canonical LR(1) support is experimental.\n\
 285 \n\
 286 "), stdout);
 287
 288       fputs (_("\
 289 Mandatory arguments to long options are mandatory for short options too.\n\
 290 "), stdout);
 291       fputs (_("\
 292 The same is true for optional arguments.\n\
 293 "), stdout);
 294
 295       fputs (_("\
 296 \n\
 297 Operation modes:\n\
 298   -h, --help                 display this help and exit\n\
 299   -V, --version              output version information and exit\n\
 300       --print-localedir      output directory containing locale-dependent data\n\
 301       --print-datadir        output directory containing skeletons and XSLT\n\
 302   -y, --yacc                 emulate POSIX Yacc\n\
 303   -W, --warnings[=CATEGORY]  report the warnings falling in CATEGORY\n\
 304 \n\
 305 "), stdout);
 306
 307       fputs (_("\
 308 Parser:\n\
 309   -L, --language=LANGUAGE          specify the output programming language\n\
 310                                    (this is an experimental feature)\n\
 311   -S, --skeleton=FILE              specify the skeleton to use\n\
 312   -t, --debug                      instrument the parser for debugging\n\
 313       --locations                  enable location support\n\
 314   -D, --define=NAME[=VALUE]        similar to `%define NAME \"VALUE\"'\n\
 315   -F, --force-define=NAME[=VALUE]  override `%define NAME \"VALUE\"'\n\
 316   -p, --name-prefix=PREFIX         prepend PREFIX to the external symbols\n\
 317   -l, --no-lines                   don't generate `#line' directives\n\
 318   -k, --token-table                include a table of token names\n\
 319 \n\
 320 "), stdout);
 321
 322       /* Keep -d and --defines separate so that ../build-aux/cross-options.pl
 323        * won't assume that -d also takes an argument.  */
 324       fputs (_("\
 325 Output:\n\
 326       --defines[=FILE]       also produce a header file\n\
 327   -d                         likewise but cannot specify FILE (for POSIX Yacc)\n\
 328   -r, --report=THINGS        also produce details on the automaton\n\
 329       --report-file=FILE     write report to FILE\n\
 330   -v, --verbose              same as `--report=state'\n\
 331   -b, --file-prefix=PREFIX   specify a PREFIX for output files\n\
 332   -o, --output=FILE          leave output to FILE\n\
 333   -g, --graph[=FILE]         also output a graph of the automaton\n\
 334   -x, --xml[=FILE]           also output an XML report of the automaton\n\
 335                              (the XML schema is experimental)\n\
 336 \n\
 337 "), stdout);
 338
 339       fputs (_("\
 340 Warning categories include:\n\
 341   `midrule-values'  unset or unused midrule values\n\
 342   `yacc'            incompatibilities with POSIX Yacc\n\
 343   `conflicts-sr'    S/R conflicts (enabled by default)\n\
 344   `conflicts-rr'    R/R conflicts (enabled by default)\n\
 345   `other'           all other warnings (enabled by default)\n\
 346   `all'             all the warnings\n\
 347   `no-CATEGORY'     turn off warnings in CATEGORY\n\
 348   `none'            turn off all the warnings\n\
 349   `error'           treat warnings as errors\n\
 350 \n\
 351 "), stdout);
 352
 353       fputs (_("\
 354 THINGS is a list of comma separated words that can include:\n\
 355   `state'        describe the states\n\
 356   `itemset'      complete the core item sets with their closure\n\
 357   `lookahead'    explicitly associate lookahead tokens to items\n\
 358   `solved'       describe shift/reduce conflicts solving\n\
 359   `all'          include all the above information\n\
 360   `none'         disable the report\n\
 361 "), stdout);
 362
 363       printf (_("\nReport bugs to <%s>.\n"), PACKAGE_BUGREPORT);
 364     }
 365
 366   exit (status);
 367 }
 368
 369
 370 /*------------------------------.
 371 | Display the version message.  |
 372 `------------------------------*/
 373
 374 static void
 375 version (void)
 376 {
 377   /* Some efforts were made to ease the translators' task, please
 378      continue.  */
 379   printf (_("bison (GNU Bison) %s"), VERSION);
 380   putc ('\n', stdout);
 381   fputs (_("Written by Robert Corbett and Richard Stallman.\n"), stdout);
 382   putc ('\n', stdout);
 383
 384   fprintf (stdout,
 385            _("Copyright (C) %d Free Software Foundation, Inc.\n"),
 386            PACKAGE_COPYRIGHT_YEAR);
 387
 388   fputs (_("\
 389 This is free software; see the source for copying conditions.  There is NO\n\
 390 warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\
 391 "),
 392          stdout);
 393 }
 394
 395
 396 /*-------------------------------------.
 397 | --skeleton and --language handling.  |
 398 `--------------------------------------*/
 399
 400 void
 401 skeleton_arg (char const *arg, int prio, location loc)
 402 {
 403   if (prio < skeleton_prio)
 404     {
 405       skeleton_prio = prio;
 406       skeleton = arg;
 407     }
 408   else if (prio == skeleton_prio)
 409     complain_at (loc, _("multiple skeleton declarations are invalid"));
 410 }
 411
 412 void
 413 language_argmatch (char const *arg, int prio, location loc)
 414 {
 415   char const *msg;
 416
 417   if (prio < language_prio)
 418     {
 419       int i;
 420       for (i = 0; valid_languages[i].language[0]; i++)
 421         if (c_strcasecmp (arg, valid_languages[i].language) == 0)
 422           {
 423             language_prio = prio;
 424             language = &valid_languages[i];
 425             return;
 426           }
 427       msg = _("invalid language `%s'");
 428     }
 429   else if (language_prio == prio)
 430     msg = _("multiple language declarations are invalid");
 431   else
 432     return;
 433
 434   complain_at (loc, msg, arg);
 435 }
 436
 437 /*----------------------.
 438 | Process the options.  |
 439 `----------------------*/
 440
 441 /* Shorts options.
 442    Should be computed from long_options.  */
 443 static char const short_options[] =
 444   "D:"
 445   "F:"
 446   "L:"
 447   "S:"
 448   "T::"
 449   "V"
 450   "W::"
 451   "b:"
 452   "d"
 453   "e"
 454   "g::"
 455   "h"
 456   "k"
 457   "l"
 458   "n"
 459   "o:"
 460   "p:"
 461   "r:"
 462   "t"
 463   "v"
 464   "x::"
 465   "y"
 466   ;
 467
 468 /* Values for long options that do not have single-letter equivalents.  */
 469 enum
 470 {
 471   LOCATIONS_OPTION = CHAR_MAX + 1,
 472   PRINT_LOCALEDIR_OPTION,
 473   PRINT_DATADIR_OPTION,
 474   REPORT_FILE_OPTION
 475 };
 476
 477 static struct option const long_options[] =
 478 {
 479   /* Operation modes. */
 480   { "help",            no_argument,       0,   'h' },
 481   { "version",         no_argument,       0,   'V' },
 482   { "print-localedir", no_argument,       0,   PRINT_LOCALEDIR_OPTION },
 483   { "print-datadir",   no_argument,       0,   PRINT_DATADIR_OPTION   },
 484   { "warnings",        optional_argument, 0,   'W' },
 485
 486   /* Parser. */
 487   { "name-prefix",   required_argument,   0,   'p' },
 488   { "include",       required_argument,   0,   'I' },
 489
 490   /* Output. */
 491   { "file-prefix", required_argument,   0,   'b' },
 492   { "output",      required_argument,   0,   'o' },
 493   { "output-file", required_argument,   0,   'o' },
 494   { "graph",       optional_argument,   0,   'g' },
 495   { "xml",         optional_argument,   0,   'x' },
 496   { "report",      required_argument,   0,   'r' },
 497   { "report-file", required_argument,   0,   REPORT_FILE_OPTION },
 498   { "verbose",     no_argument,         0,   'v' },
 499
 500   /* Hidden. */
 501   { "trace",         optional_argument,   0,     'T' },
 502
 503   /* Output.  */
 504   { "defines",     optional_argument,   0,   'd' },
 505
 506   /* Operation modes.  */
 507   { "fixed-output-files", no_argument,  0,   'y' },
 508   { "yacc",               no_argument,  0,   'y' },
 509
 510   /* Parser.  */
 511   { "debug",          no_argument,               0,   't' },
 512   { "define",         required_argument,         0,   'D' },
 513   { "force-define",   required_argument,         0,   'F' },
 514   { "locations",      no_argument,               0, LOCATIONS_OPTION },
 515   { "no-lines",       no_argument,               0,   'l' },
 516   { "raw",            no_argument,               0,     0 },
 517   { "skeleton",       required_argument,         0,   'S' },
 518   { "language",       required_argument,         0,   'L' },
 519   { "token-table",    no_argument,               0,   'k' },
 520
 521   {0, 0, 0, 0}
 522 };
 523
 524 /* Under DOS, there is no difference on the case.  This can be
 525    troublesome when looking for `.tab' etc.  */
 526 #ifdef MSDOS
 527 # define AS_FILE_NAME(File) (strlwr (File), (File))
 528 #else
 529 # define AS_FILE_NAME(File) (File)
 530 #endif
 531
 532 /* Build a location for the current command line argument. */
 533 static
 534 location
 535 command_line_location (void)
 536 {
 537   location res;
 538   /* "<command line>" is used in GCC's messages about -D. */
 539   boundary_set (&res.start, uniqstr_new ("<command line>"), optind, -1);
 540   res.end = res.start;
 541   return res;
 542 }
 543
 544
 545 void
 546 getargs (int argc, char *argv[])
 547 {
 548   int c;
 549
 550   while ((c = getopt_long (argc, argv, short_options, long_options, NULL))
 551          != -1)
 552     switch (c)
 553       {
 554         /* ASCII Sorting for short options (i.e., upper case then
 555            lower case), and then long-only options.  */
 556
 557       case 0:
 558         /* Certain long options cause getopt_long to return 0.  */
 559         break;
 560
 561       case 'D': /* -DNAME[=VALUE]. */
 562       case 'F': /* -FNAME[=VALUE]. */
 563         {
 564           char* name = optarg;
 565           char* value = mbschr (optarg, '=');
 566           if (value)
 567             *value++ = 0;
 568           muscle_percent_define_insert (name, command_line_location (),
 569                                         value ? value : "",
 570                                         c == 'D' ? MUSCLE_PERCENT_DEFINE_D
 571                                                  : MUSCLE_PERCENT_DEFINE_F);
 572         }
 573         break;
 574
 575       case 'I':
 576         include = AS_FILE_NAME (optarg);
 577         break;
 578
 579       case 'L':
 580         language_argmatch (optarg, command_line_prio,
 581                            command_line_location ());
 582         break;
 583
 584       case 'S':
 585         skeleton_arg (AS_FILE_NAME (optarg), command_line_prio,
 586                       command_line_location ());
 587         break;
 588
 589       case 'T':
 590         FLAGS_ARGMATCH (trace, optarg);
 591         break;
 592
 593       case 'V':
 594         version ();
 595         exit (EXIT_SUCCESS);
 596
 597       case 'W':
 598         FLAGS_ARGMATCH (warnings, optarg);
 599         break;
 600
 601       case 'b':
 602         spec_file_prefix = AS_FILE_NAME (optarg);
 603         break;
 604
 605       case 'd':
 606         /* Here, the -d and --defines options are differentiated.  */
 607         defines_flag = true;
 608         if (optarg)
 609           spec_defines_file = xstrdup (AS_FILE_NAME (optarg));
 610         break;
 611
 612       case 'g':
 613         graph_flag = true;
 614         if (optarg)
 615           spec_graph_file = xstrdup (AS_FILE_NAME (optarg));
 616         break;
 617
 618       case 'h':
 619         usage (EXIT_SUCCESS);
 620
 621       case 'k':
 622         token_table_flag = true;
 623         break;
 624
 625       case 'l':
 626         no_lines_flag = true;
 627         break;
 628
 629       case 'o':
 630         spec_outfile = AS_FILE_NAME (optarg);
 631         break;
 632
 633       case 'p':
 634         spec_name_prefix = optarg;
 635         break;
 636
 637       case 'r':
 638         FLAGS_ARGMATCH (report, optarg);
 639         break;
 640
 641       case 't':
 642         debug_flag = true;
 643         break;
 644
 645       case 'v':
 646         report_flag |= report_states;
 647         break;
 648
 649       case 'x':
 650         xml_flag = true;
 651         if (optarg)
 652           spec_xml_file = xstrdup (AS_FILE_NAME (optarg));
 653         break;
 654
 655       case 'y':
 656         yacc_flag = true;
 657         break;
 658
 659       case LOCATIONS_OPTION:
 660         locations_flag = true;
 661         break;
 662
 663       case PRINT_LOCALEDIR_OPTION:
 664         printf ("%s\n", LOCALEDIR);
 665         exit (EXIT_SUCCESS);
 666
 667       case PRINT_DATADIR_OPTION:
 668         printf ("%s\n", compute_pkgdatadir ());
 669         exit (EXIT_SUCCESS);
 670
 671       case REPORT_FILE_OPTION:
 672         spec_verbose_file = xstrdup (AS_FILE_NAME (optarg));
 673         break;
 674
 675       default:
 676         usage (EXIT_FAILURE);
 677       }
 678
 679   if (argc - optind != 1)
 680     {
 681       if (argc - optind < 1)
 682         error (0, 0, _("missing operand after `%s'"), argv[argc - 1]);
 683       else
 684         error (0, 0, _("extra operand `%s'"), argv[optind + 1]);
 685       usage (EXIT_FAILURE);
 686     }
 687
 688   current_file = grammar_file = uniqstr_new (argv[optind]);
 689   MUSCLE_INSERT_C_STRING ("file_name", grammar_file);
 690 }
 691
 692 void
 693 tr (char *s, char from, char to)
 694 {
 695   for (; *s; s++)
 696     if (*s == from)
 697       *s = to;
 698 }