src/getargs.c

   1 /* Parse command line arguments for Bison.
   2
   3    Copyright (C) 1984, 1986, 1989, 1992, 2000-2011 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 defines_flag;
  51 bool graph_flag;
  52 bool xml_flag;
  53 bool no_lines_flag;
  54 bool token_table_flag;
  55 bool yacc_flag; /* for -y */
  56
  57 bool nondeterministic_parser = false;
  58 bool glr_parser = false;
  59
  60 int report_flag = report_none;
  61 int trace_flag = trace_none;
  62 int warnings_flag = warnings_conflicts_sr | warnings_conflicts_rr
  63                     | warnings_other;
  64
  65 static struct bison_language const valid_languages[] = {
  66   { "c", "c-skel.m4", ".c", ".h", true },
  67   { "c++", "c++-skel.m4", ".cc", ".hh", true },
  68   { "java", "java-skel.m4", ".java", ".java", false },
  69   { "", "", "", "", false }
  70 };
  71
  72 int skeleton_prio = default_prio;
  73 const char *skeleton = NULL;
  74 int language_prio = default_prio;
  75 struct bison_language const *language = &valid_languages[0];
  76 const char *include = NULL;
  77
  78 char *program_name;
  79
  80
  81 /** Decode an option's set of keys.
  82  *
  83  *  \param option   option being decoded.
  84  *  \param keys     array of valid subarguments.
  85  *  \param values   array of corresponding (int) values.
  86  *  \param all      the all value.
  87  *  \param flags    the flags to update
  88  *  \param args     comma separated list of effective subarguments to decode.
  89  *                  If 0, then activate all the flags.
  90  *
  91  *  If VALUE != 0 then KEY sets flags and no-KEY clears them.
  92  *  If VALUE == 0 then KEY clears all flags from \c all and no-KEY sets all
  93  *  flags from \c all.  Thus no-none = all and no-all = none.
  94  */
  95 static void
  96 flags_argmatch (const char *option,
  97                 const char * const keys[], const int values[],
  98                 int all, int *flags, char *args)
  99 {
 100   if (args)
 101     {
 102       args = strtok (args, ",");
 103       while (args)
 104         {
 105           int no = strncmp (args, "no-", 3) == 0 ? 3 : 0;
 106           int value = XARGMATCH (option, args + no, keys, values);
 107           if (value == 0)
 108             {
 109               if (no)
 110                 *flags |= all;
 111               else
 112                 *flags &= ~all;
 113             }
 114           else
 115             {
 116               if (no)
 117                 *flags &= ~value;
 118               else
 119                 *flags |= value;
 120             }
 121           args = strtok (NULL, ",");
 122         }
 123     }
 124   else
 125     *flags |= all;
 126 }
 127
 128 /** Decode a set of sub arguments.
 129  *
 130  *  \param FlagName  the flag familly to update.
 131  *  \param Args      the effective sub arguments to decode.
 132  *
 133  *  \arg FlagName_args   the list of keys.
 134  *  \arg FlagName_types  the list of values.
 135  *  \arg FlagName_all    the all value.
 136  *  \arg FlagName_flag   the flag to update.
 137  */
 138 #define FLAGS_ARGMATCH(FlagName, Args)                                  \
 139   flags_argmatch ("--" #FlagName, FlagName ## _args, FlagName ## _types, \
 140                   FlagName ## _all, &FlagName ## _flag, Args)
 141
 142
 143 /*----------------------.
 144 | --report's handling.  |
 145 `----------------------*/
 146
 147 static const char * const report_args[] =
 148 {
 149   /* In a series of synonyms, present the most meaningful first, so
 150      that argmatch_valid be more readable.  */
 151   "none",
 152   "state", "states",
 153   "itemset", "itemsets",
 154   "lookahead", "lookaheads", "look-ahead",
 155   "solved",
 156   "all",
 157   0
 158 };
 159
 160 static const int report_types[] =
 161 {
 162   report_none,
 163   report_states, report_states,
 164   report_states | report_itemsets, report_states | report_itemsets,
 165   report_states | report_lookahead_tokens,
 166   report_states | report_lookahead_tokens,
 167   report_states | report_lookahead_tokens,
 168   report_states | report_solved_conflicts,
 169   report_all
 170 };
 171
 172 ARGMATCH_VERIFY (report_args, report_types);
 173
 174
 175 /*---------------------.
 176 | --trace's handling.  |
 177 `---------------------*/
 178
 179 static const char * const trace_args[] =
 180 {
 181   /* In a series of synonyms, present the most meaningful first, so
 182      that argmatch_valid be more readable.  */
 183   "none       - no traces",
 184   "scan       - grammar scanner traces",
 185   "parse      - grammar parser traces",
 186   "automaton  - construction of the automaton",
 187   "bitsets    - use of bitsets",
 188   "grammar    - reading, reducing the grammar",
 189   "resource   - memory consumption (where available)",
 190   "sets       - grammar sets: firsts, nullable etc.",
 191   "muscles    - m4 definitions passed to the skeleton",
 192   "tools      - m4 invocation",
 193   "m4         - m4 traces",
 194   "skeleton   - skeleton postprocessing",
 195   "time       - time consumption",
 196   "ielr       - IELR conversion",
 197   "all        - all of the above",
 198   0
 199 };
 200
 201 static const int trace_types[] =
 202 {
 203   trace_none,
 204   trace_scan,
 205   trace_parse,
 206   trace_automaton,
 207   trace_bitsets,
 208   trace_grammar,
 209   trace_resource,
 210   trace_sets,
 211   trace_muscles,
 212   trace_tools,
 213   trace_m4,
 214   trace_skeleton,
 215   trace_time,
 216   trace_ielr,
 217   trace_all
 218 };
 219
 220 ARGMATCH_VERIFY (trace_args, trace_types);
 221
 222
 223 /*------------------------.
 224 | --warnings's handling.  |
 225 `------------------------*/
 226
 227 static const char * const warnings_args[] =
 228 {
 229   /* In a series of synonyms, present the most meaningful first, so
 230      that argmatch_valid be more readable.  */
 231   "none            - no warnings",
 232   "midrule-values  - unset or unused midrule values",
 233   "yacc            - incompatibilities with POSIX Yacc",
 234   "conflicts-sr    - S/R conflicts",
 235   "conflicts-rr    - R/R conflicts",
 236   "other           - all other warnings",
 237   "all             - all of the above",
 238   "error           - warnings are errors",
 239   0
 240 };
 241
 242 static const int warnings_types[] =
 243 {
 244   warnings_none,
 245   warnings_midrule_values,
 246   warnings_yacc,
 247   warnings_conflicts_sr,
 248   warnings_conflicts_rr,
 249   warnings_other,
 250   warnings_all,
 251   warnings_error
 252 };
 253
 254 ARGMATCH_VERIFY (warnings_args, warnings_types);
 255
 256
 257 /*-------------------------------------------.
 258 | Display the help message and exit STATUS.  |
 259 `-------------------------------------------*/
 260
 261 static void usage (int) ATTRIBUTE_NORETURN;
 262
 263 static void
 264 usage (int status)
 265 {
 266   if (status != 0)
 267     fprintf (stderr, _("Try `%s --help' for more information.\n"),
 268              program_name);
 269   else
 270     {
 271       /* For ../build-aux/cross-options.pl to work, use the format:
 272                 ^  -S, --long[=ARGS] (whitespace)
 273          A --long option is required.
 274          Otherwise, add exceptions to ../build-aux/cross-options.pl.  */
 275
 276       printf (_("Usage: %s [OPTION]... FILE\n"), program_name);
 277       fputs (_("\
 278 Generate a deterministic LR or generalized LR (GLR) parser employing\n\
 279 LALR(1), IELR(1), or canonical LR(1) parser tables.  IELR(1) and\n\
 280 canonical LR(1) support is experimental.\n\
 281 \n\
 282 "), stdout);
 283
 284       fputs (_("\
 285 Mandatory arguments to long options are mandatory for short options too.\n\
 286 "), stdout);
 287       fputs (_("\
 288 The same is true for optional arguments.\n\
 289 "), stdout);
 290
 291       fputs (_("\
 292 \n\
 293 Operation modes:\n\
 294   -h, --help                 display this help and exit\n\
 295   -V, --version              output version information and exit\n\
 296       --print-localedir      output directory containing locale-dependent data\n\
 297       --print-datadir        output directory containing skeletons and XSLT\n\
 298   -y, --yacc                 emulate POSIX Yacc\n\
 299   -W, --warnings[=CATEGORY]  report the warnings falling in CATEGORY\n\
 300 \n\
 301 "), stdout);
 302
 303       fputs (_("\
 304 Parser:\n\
 305   -L, --language=LANGUAGE          specify the output programming language\n\
 306                                    (this is an experimental feature)\n\
 307   -S, --skeleton=FILE              specify the skeleton to use\n\
 308   -t, --debug                      instrument the parser for tracing\n\
 309                                    same as `-Dparse.trace'\n\
 310       --locations                  enable location support\n\
 311   -D, --define=NAME[=VALUE]        similar to `%define NAME \"VALUE\"'\n\
 312   -F, --force-define=NAME[=VALUE]  override `%define NAME \"VALUE\"'\n\
 313   -p, --name-prefix=PREFIX         prepend PREFIX to the external symbols\n\
 314   -l, --no-lines                   don't generate `#line' directives\n\
 315   -k, --token-table                include a table of token names\n\
 316 \n\
 317 "), stdout);
 318
 319       /* Keep -d and --defines separate so that ../build-aux/cross-options.pl
 320        * won't assume that -d also takes an argument.  */
 321       fputs (_("\
 322 Output:\n\
 323       --defines[=FILE]       also produce a header file\n\
 324   -d                         likewise but cannot specify FILE (for POSIX Yacc)\n\
 325   -r, --report=THINGS        also produce details on the automaton\n\
 326       --report-file=FILE     write report to FILE\n\
 327   -v, --verbose              same as `--report=state'\n\
 328   -b, --file-prefix=PREFIX   specify a PREFIX for output files\n\
 329   -o, --output=FILE          leave output to FILE\n\
 330   -g, --graph[=FILE]         also output a graph of the automaton\n\
 331   -x, --xml[=FILE]           also output an XML report of the automaton\n\
 332                              (the XML schema is experimental)\n\
 333 \n\
 334 "), stdout);
 335
 336       fputs (_("\
 337 Warning categories include:\n\
 338   `midrule-values'  unset or unused midrule values\n\
 339   `yacc'            incompatibilities with POSIX Yacc\n\
 340   `conflicts-sr'    S/R conflicts (enabled by default)\n\
 341   `conflicts-rr'    R/R conflicts (enabled by default)\n\
 342   `other'           all other warnings (enabled by default)\n\
 343   `all'             all the warnings\n\
 344   `no-CATEGORY'     turn off warnings in CATEGORY\n\
 345   `none'            turn off all the warnings\n\
 346   `error'           treat warnings as errors\n\
 347 \n\
 348 "), stdout);
 349
 350       fputs (_("\
 351 THINGS is a list of comma separated words that can include:\n\
 352   `state'        describe the states\n\
 353   `itemset'      complete the core item sets with their closure\n\
 354   `lookahead'    explicitly associate lookahead tokens to items\n\
 355   `solved'       describe shift/reduce conflicts solving\n\
 356   `all'          include all the above information\n\
 357   `none'         disable the report\n\
 358 "), stdout);
 359
 360       printf (_("\nReport bugs to <%s>.\n"), PACKAGE_BUGREPORT);
 361     }
 362
 363   exit (status);
 364 }
 365
 366
 367 /*------------------------------.
 368 | Display the version message.  |
 369 `------------------------------*/
 370
 371 static void
 372 version (void)
 373 {
 374   /* Some efforts were made to ease the translators' task, please
 375      continue.  */
 376   printf (_("bison (GNU Bison) %s"), VERSION);
 377   putc ('\n', stdout);
 378   fputs (_("Written by Robert Corbett and Richard Stallman.\n"), stdout);
 379   putc ('\n', stdout);
 380
 381   fprintf (stdout,
 382            _("Copyright (C) %d Free Software Foundation, Inc.\n"),
 383            PACKAGE_COPYRIGHT_YEAR);
 384
 385   fputs (_("\
 386 This is free software; see the source for copying conditions.  There is NO\n\
 387 warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\
 388 "),
 389          stdout);
 390 }
 391
 392
 393 /*-------------------------------------.
 394 | --skeleton and --language handling.  |
 395 `--------------------------------------*/
 396
 397 void
 398 skeleton_arg (char const *arg, int prio, location loc)
 399 {
 400   if (prio < skeleton_prio)
 401     {
 402       skeleton_prio = prio;
 403       skeleton = arg;
 404     }
 405   else if (prio == skeleton_prio)
 406     complain_at (loc, _("multiple skeleton declarations are invalid"));
 407 }
 408
 409 void
 410 language_argmatch (char const *arg, int prio, location loc)
 411 {
 412   char const *msg;
 413
 414   if (prio < language_prio)
 415     {
 416       int i;
 417       for (i = 0; valid_languages[i].language[0]; i++)
 418         if (c_strcasecmp (arg, valid_languages[i].language) == 0)
 419           {
 420             language_prio = prio;
 421             language = &valid_languages[i];
 422             return;
 423           }
 424       msg = _("invalid language `%s'");
 425     }
 426   else if (language_prio == prio)
 427     msg = _("multiple language declarations are invalid");
 428   else
 429     return;
 430
 431   complain_at (loc, msg, arg);
 432 }
 433
 434 /*----------------------.
 435 | Process the options.  |
 436 `----------------------*/
 437
 438 /* Shorts options.
 439    Should be computed from long_options.  */
 440 static char const short_options[] =
 441   "D:"
 442   "F:"
 443   "L:"
 444   "S:"
 445   "T::"
 446   "V"
 447   "W::"
 448   "b:"
 449   "d"
 450   "e"
 451   "g::"
 452   "h"
 453   "k"
 454   "l"
 455   "n"
 456   "o:"
 457   "p:"
 458   "r:"
 459   "t"
 460   "v"
 461   "x::"
 462   "y"
 463   ;
 464
 465 /* Values for long options that do not have single-letter equivalents.  */
 466 enum
 467 {
 468   LOCATIONS_OPTION = CHAR_MAX + 1,
 469   PRINT_LOCALEDIR_OPTION,
 470   PRINT_DATADIR_OPTION,
 471   REPORT_FILE_OPTION
 472 };
 473
 474 static struct option const long_options[] =
 475 {
 476   /* Operation modes. */
 477   { "help",            no_argument,       0,   'h' },
 478   { "version",         no_argument,       0,   'V' },
 479   { "print-localedir", no_argument,       0,   PRINT_LOCALEDIR_OPTION },
 480   { "print-datadir",   no_argument,       0,   PRINT_DATADIR_OPTION   },
 481   { "warnings",        optional_argument, 0,   'W' },
 482
 483   /* Parser. */
 484   { "name-prefix",   required_argument,   0,   'p' },
 485   { "include",       required_argument,   0,   'I' },
 486
 487   /* Output. */
 488   { "file-prefix", required_argument,   0,   'b' },
 489   { "output",      required_argument,   0,   'o' },
 490   { "output-file", required_argument,   0,   'o' },
 491   { "graph",       optional_argument,   0,   'g' },
 492   { "xml",         optional_argument,   0,   'x' },
 493   { "report",      required_argument,   0,   'r' },
 494   { "report-file", required_argument,   0,   REPORT_FILE_OPTION },
 495   { "verbose",     no_argument,         0,   'v' },
 496
 497   /* Hidden. */
 498   { "trace",         optional_argument,   0,     'T' },
 499
 500   /* Output.  */
 501   { "defines",     optional_argument,   0,   'd' },
 502
 503   /* Operation modes.  */
 504   { "fixed-output-files", no_argument,  0,   'y' },
 505   { "yacc",               no_argument,  0,   'y' },
 506
 507   /* Parser.  */
 508   { "debug",          no_argument,               0,   't' },
 509   { "define",         required_argument,         0,   'D' },
 510   { "force-define",   required_argument,         0,   'F' },
 511   { "locations",      no_argument,               0, LOCATIONS_OPTION },
 512   { "no-lines",       no_argument,               0,   'l' },
 513   { "raw",            no_argument,               0,     0 },
 514   { "skeleton",       required_argument,         0,   'S' },
 515   { "language",       required_argument,         0,   'L' },
 516   { "token-table",    no_argument,               0,   'k' },
 517
 518   {0, 0, 0, 0}
 519 };
 520
 521 /* Under DOS, there is no difference on the case.  This can be
 522    troublesome when looking for `.tab' etc.  */
 523 #ifdef MSDOS
 524 # define AS_FILE_NAME(File) (strlwr (File), (File))
 525 #else
 526 # define AS_FILE_NAME(File) (File)
 527 #endif
 528
 529 /* Build a location for the current command line argument. */
 530 static
 531 location
 532 command_line_location (void)
 533 {
 534   location res;
 535   /* "<command line>" is used in GCC's messages about -D. */
 536   boundary_set (&res.start, uniqstr_new ("<command line>"), optind, -1);
 537   res.end = res.start;
 538   return res;
 539 }
 540
 541
 542 void
 543 getargs (int argc, char *argv[])
 544 {
 545   int c;
 546
 547   while ((c = getopt_long (argc, argv, short_options, long_options, NULL))
 548          != -1)
 549     switch (c)
 550       {
 551         /* ASCII Sorting for short options (i.e., upper case then
 552            lower case), and then long-only options.  */
 553
 554       case 0:
 555         /* Certain long options cause getopt_long to return 0.  */
 556         break;
 557
 558       case 'D': /* -DNAME[=VALUE]. */
 559       case 'F': /* -FNAME[=VALUE]. */
 560         {
 561           char* name = optarg;
 562           char* value = strchr (optarg, '=');
 563           if (value)
 564             *value++ = 0;
 565           muscle_percent_define_insert (name, command_line_location (),
 566                                         value ? value : "",
 567                                         c == 'D' ? MUSCLE_PERCENT_DEFINE_D
 568                                                  : MUSCLE_PERCENT_DEFINE_F);
 569         }
 570         break;
 571
 572       case 'I':
 573         include = AS_FILE_NAME (optarg);
 574         break;
 575
 576       case 'L':
 577         language_argmatch (optarg, command_line_prio,
 578                            command_line_location ());
 579         break;
 580
 581       case 'S':
 582         skeleton_arg (AS_FILE_NAME (optarg), command_line_prio,
 583                       command_line_location ());
 584         break;
 585
 586       case 'T':
 587         FLAGS_ARGMATCH (trace, optarg);
 588         break;
 589
 590       case 'V':
 591         version ();
 592         exit (EXIT_SUCCESS);
 593
 594       case 'W':
 595         FLAGS_ARGMATCH (warnings, optarg);
 596         break;
 597
 598       case 'b':
 599         spec_file_prefix = AS_FILE_NAME (optarg);
 600         break;
 601
 602       case 'd':
 603         /* Here, the -d and --defines options are differentiated.  */
 604         defines_flag = true;
 605         if (optarg)
 606           spec_defines_file = xstrdup (AS_FILE_NAME (optarg));
 607         break;
 608
 609       case 'g':
 610         graph_flag = true;
 611         if (optarg)
 612           spec_graph_file = xstrdup (AS_FILE_NAME (optarg));
 613         break;
 614
 615       case 'h':
 616         usage (EXIT_SUCCESS);
 617
 618       case 'k':
 619         token_table_flag = true;
 620         break;
 621
 622       case 'l':
 623         no_lines_flag = true;
 624         break;
 625
 626       case 'o':
 627         spec_outfile = AS_FILE_NAME (optarg);
 628         break;
 629
 630       case 'p':
 631         spec_name_prefix = optarg;
 632         break;
 633
 634       case 'r':
 635         FLAGS_ARGMATCH (report, optarg);
 636         break;
 637
 638       case 't':
 639         muscle_percent_define_insert ("parse.trace",
 640                                       command_line_location (), "",
 641                                       MUSCLE_PERCENT_DEFINE_D);
 642         break;
 643
 644       case 'v':
 645         report_flag |= report_states;
 646         break;
 647
 648       case 'x':
 649         xml_flag = true;
 650         if (optarg)
 651           spec_xml_file = xstrdup (AS_FILE_NAME (optarg));
 652         break;
 653
 654       case 'y':
 655         yacc_flag = true;
 656         break;
 657
 658       case LOCATIONS_OPTION:
 659         muscle_percent_define_ensure ("locations",
 660                                       command_line_location (), 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 }