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 <getopt.h>
  30 #include <progname.h>
  31
  32 #include "complain.h"
  33 #include "files.h"
  34 #include "getargs.h"
  35 #include "muscle-tab.h"
  36 #include "quote.h"
  37 #include "uniqstr.h"
  38
  39 bool defines_flag;
  40 bool graph_flag;
  41 bool xml_flag;
  42 bool no_lines_flag;
  43 bool token_table_flag;
  44 bool yacc_flag; /* for -y */
  45
  46 bool nondeterministic_parser = false;
  47 bool glr_parser = false;
  48
  49 int report_flag = report_none;
  50 int trace_flag = trace_none;
  51
  52 static struct bison_language const valid_languages[] = {
  53   { "c", "c-skel.m4", ".c", ".h", true },
  54   { "c++", "c++-skel.m4", ".cc", ".hh", true },
  55   { "java", "java-skel.m4", ".java", ".java", false },
  56   { "", "", "", "", false }
  57 };
  58
  59 int skeleton_prio = default_prio;
  60 const char *skeleton = NULL;
  61 int language_prio = default_prio;
  62 struct bison_language const *language = &valid_languages[0];
  63 const char *include = NULL;
  64
  65 /** Decode an option's key.
  66  *
  67  *  \param option   option being decoded.
  68  *  \param keys     array of valid subarguments.
  69  *  \param values   array of corresponding (int) values.
  70  *  \param all      the all value.
  71  *  \param flags    the flags to update
  72  *  \param arg      the subarguments to decode.
  73  *                  If null, then activate all the flags.
  74  *  \param no       length of the potential "no-" prefix.
  75  *                  Can be 0 or 3. If 3, negate the action of the subargument.
  76  *  \param err      length of a potential "error=".
  77  *                  Can be 0 or 6. If 6, treat the subargument as a CATEGORY
  78  *
  79  *  If VALUE != 0 then KEY sets flags and no-KEY clears them.
  80  *  If VALUE == 0 then KEY clears all flags from \c all and no-KEY sets all
  81  *  flags from \c all.  Thus no-none = all and no-all = none.
  82  */
  83 static void
  84 flag_argmatch (const char *option,
  85                const char * const keys[], const int values[],
  86                int all, int *flags, char *arg, size_t no, size_t err)
  87 {
  88   int value = 0;
  89   if (!err || arg[no + err++] != '\0')
  90     value = XARGMATCH (option, arg + no + err, keys, values);
  91
  92   if (value)
  93     {
  94       if (no)
  95         *flags &= ~value;
  96       else
  97         {
  98           if (err)
  99             warnings_flag |= value;
 100           *flags |= value;
 101         }
 102     }
 103   else
 104     {
 105       /* With a simpler 'if (no)' version, -Werror means -Werror=all
 106          (or rather, -Werror=no-none, but that syntax is invalid).
 107          The difference is:
 108          - Werror activates all errors, but not the warnings
 109          - Werror=all activates errors, and all warnings */
 110       if (no ? !err : err)
 111         *flags |= all;
 112       else
 113         *flags &= ~all;
 114     }
 115 }
 116 /** Decode an option's set of keys.
 117  *
 118  *  \param option   option being decoded.
 119  *  \param keys     array of valid subarguments.
 120  *  \param values   array of corresponding (int) values.
 121  *  \param all      the all value.
 122  *  \param flags    the flags to update
 123  *  \param args     comma separated list of effective subarguments to decode.
 124  *                  If 0, then activate all the flags.
 125  */
 126 static void
 127 flags_argmatch (const char *option,
 128                 const char * const keys[], const int values[],
 129                 int all, int *flags, char *args)
 130 {
 131   if (args)
 132     for (args = strtok (args, ","); args; args = strtok (NULL, ","))
 133       {
 134         size_t no = STRPREFIX_LIT ("no-", args) ? 3 : 0;
 135         size_t err = STRPREFIX_LIT ("error", args + no) ? 5 : 0;
 136
 137         flag_argmatch (option, keys,
 138                        values, all, err ? &errors_flag : flags,
 139                        args, no, err);
 140       }
 141   else
 142     *flags |= all;
 143 }
 144
 145 /** Decode a set of sub arguments.
 146  *
 147  *  \param FlagName  the flag familly to update.
 148  *  \param Args      the effective sub arguments to decode.
 149  *  \param All       the "all" value.
 150  *
 151  *  \arg FlagName_args   the list of keys.
 152  *  \arg FlagName_types  the list of values.
 153  *  \arg FlagName_flag   the flag to update.
 154  */
 155 #define FLAGS_ARGMATCH(FlagName, Args, All)                             \
 156   flags_argmatch ("--" #FlagName, FlagName ## _args, FlagName ## _types, \
 157                   All, &FlagName ## _flag, Args)
 158
 159
 160 /*----------------------.
 161 | --report's handling.  |
 162 `----------------------*/
 163
 164 static const char * const report_args[] =
 165 {
 166   /* In a series of synonyms, present the most meaningful first, so
 167      that argmatch_valid be more readable.  */
 168   "none",
 169   "state", "states",
 170   "itemset", "itemsets",
 171   "lookahead", "lookaheads", "look-ahead",
 172   "solved",
 173   "all",
 174   0
 175 };
 176
 177 static const int report_types[] =
 178 {
 179   report_none,
 180   report_states, report_states,
 181   report_states | report_itemsets, report_states | report_itemsets,
 182   report_states | report_lookahead_tokens,
 183   report_states | report_lookahead_tokens,
 184   report_states | report_lookahead_tokens,
 185   report_states | report_solved_conflicts,
 186   report_all
 187 };
 188
 189 ARGMATCH_VERIFY (report_args, report_types);
 190
 191
 192 /*---------------------.
 193 | --trace's handling.  |
 194 `---------------------*/
 195
 196 static const char * const trace_args[] =
 197 {
 198   /* In a series of synonyms, present the most meaningful first, so
 199      that argmatch_valid be more readable.  */
 200   "none       - no traces",
 201   "scan       - grammar scanner traces",
 202   "parse      - grammar parser traces",
 203   "automaton  - construction of the automaton",
 204   "bitsets    - use of bitsets",
 205   "grammar    - reading, reducing the grammar",
 206   "resource   - memory consumption (where available)",
 207   "sets       - grammar sets: firsts, nullable etc.",
 208   "muscles    - m4 definitions passed to the skeleton",
 209   "tools      - m4 invocation",
 210   "m4         - m4 traces",
 211   "skeleton   - skeleton postprocessing",
 212   "time       - time consumption",
 213   "ielr       - IELR conversion",
 214   "all        - all of the above",
 215   0
 216 };
 217
 218 static const int trace_types[] =
 219 {
 220   trace_none,
 221   trace_scan,
 222   trace_parse,
 223   trace_automaton,
 224   trace_bitsets,
 225   trace_grammar,
 226   trace_resource,
 227   trace_sets,
 228   trace_muscles,
 229   trace_tools,
 230   trace_m4,
 231   trace_skeleton,
 232   trace_time,
 233   trace_ielr,
 234   trace_all
 235 };
 236
 237 ARGMATCH_VERIFY (trace_args, trace_types);
 238
 239
 240 /*------------------------.
 241 | --warnings's handling.  |
 242 `------------------------*/
 243
 244 static const char * const warnings_args[] =
 245 {
 246   /* In a series of synonyms, present the most meaningful first, so
 247      that argmatch_valid be more readable.  */
 248   "none            - no warnings",
 249   "midrule-values  - unset or unused midrule values",
 250   "yacc            - incompatibilities with POSIX Yacc",
 251   "conflicts-sr    - S/R conflicts",
 252   "conflicts-rr    - R/R conflicts",
 253   "deprecated      - obsolete constructs",
 254   "other           - all other warnings",
 255   "all             - all of the above",
 256   "error           - warnings are errors",
 257   0
 258 };
 259
 260 static const int warnings_types[] =
 261 {
 262   Wnone,
 263   Wmidrule_values,
 264   Wyacc,
 265   Wconflicts_sr,
 266   Wconflicts_rr,
 267   Wdeprecated,
 268   Wother,
 269   Wall,
 270   Werror
 271 };
 272
 273 ARGMATCH_VERIFY (warnings_args, warnings_types);
 274
 275 /*-------------------------------------------.
 276 | Display the help message and exit STATUS.  |
 277 `-------------------------------------------*/
 278
 279 static void usage (int) ATTRIBUTE_NORETURN;
 280
 281 static void
 282 usage (int status)
 283 {
 284   if (status != 0)
 285     fprintf (stderr, _("Try `%s --help' for more information.\n"),
 286              program_name);
 287   else
 288     {
 289       /* For ../build-aux/cross-options.pl to work, use the format:
 290                 ^  -S, --long[=ARGS] (whitespace)
 291          A --long option is required.
 292          Otherwise, add exceptions to ../build-aux/cross-options.pl.  */
 293
 294       printf (_("Usage: %s [OPTION]... FILE\n"), program_name);
 295       fputs (_("\
 296 Generate a deterministic LR or generalized LR (GLR) parser employing\n\
 297 LALR(1), IELR(1), or canonical LR(1) parser tables.  IELR(1) and\n\
 298 canonical LR(1) support is experimental.\n\
 299 \n\
 300 "), stdout);
 301
 302       fputs (_("\
 303 Mandatory arguments to long options are mandatory for short options too.\n\
 304 "), stdout);
 305       fputs (_("\
 306 The same is true for optional arguments.\n\
 307 "), stdout);
 308
 309       fputs (_("\
 310 \n\
 311 Operation modes:\n\
 312   -h, --help                 display this help and exit\n\
 313   -V, --version              output version information and exit\n\
 314       --print-localedir      output directory containing locale-dependent data\n\
 315       --print-datadir        output directory containing skeletons and XSLT\n\
 316   -y, --yacc                 emulate POSIX Yacc\n\
 317   -W, --warnings[=CATEGORY]  report the warnings falling in CATEGORY\n\
 318 \n\
 319 "), stdout);
 320
 321       fputs (_("\
 322 Parser:\n\
 323   -L, --language=LANGUAGE          specify the output programming language\n\
 324                                    (this is an experimental feature)\n\
 325   -S, --skeleton=FILE              specify the skeleton to use\n\
 326   -t, --debug                      instrument the parser for tracing\n\
 327                                    same as `-Dparse.trace'\n\
 328       --locations                  enable location support\n\
 329   -D, --define=NAME[=VALUE]        similar to '%define NAME \"VALUE\"'\n\
 330   -F, --force-define=NAME[=VALUE]  override '%define NAME \"VALUE\"'\n\
 331   -p, --name-prefix=PREFIX         prepend PREFIX to the external symbols\n\
 332                                    deprecated by '-Dapi.prefix=PREFIX'\n\
 333   -l, --no-lines                   don't generate '#line' directives\n\
 334   -k, --token-table                include a table of token names\n\
 335 \n\
 336 "), stdout);
 337
 338       /* Keep -d and --defines separate so that ../build-aux/cross-options.pl
 339        * won't assume that -d also takes an argument.  */
 340       fputs (_("\
 341 Output:\n\
 342       --defines[=FILE]       also produce a header file\n\
 343   -d                         likewise but cannot specify FILE (for POSIX Yacc)\n\
 344   -r, --report=THINGS        also produce details on the automaton\n\
 345       --report-file=FILE     write report to FILE\n\
 346   -v, --verbose              same as `--report=state'\n\
 347   -b, --file-prefix=PREFIX   specify a PREFIX for output files\n\
 348   -o, --output=FILE          leave output to FILE\n\
 349   -g, --graph[=FILE]         also output a graph of the automaton\n\
 350   -x, --xml[=FILE]           also output an XML report of the automaton\n\
 351                              (the XML schema is experimental)\n\
 352 \n\
 353 "), stdout);
 354
 355       fputs (_("\
 356 Warning categories include:\n\
 357   `midrule-values'    unset or unused midrule values\n\
 358   `yacc'              incompatibilities with POSIX Yacc\n\
 359   `conflicts-sr'      S/R conflicts (enabled by default)\n\
 360   `conflicts-rr'      R/R conflicts (enabled by default)\n\
 361   `deprecated'        obsolete constructs\n\
 362   `other'             all other warnings (enabled by default)\n\
 363   `all'               all the warnings\n\
 364   `no-CATEGORY'       turn off warnings in CATEGORY\n\
 365   `none'              turn off all the warnings\n\
 366   `error[=CATEGORY]'  treat warnings as errors\n\
 367 "), stdout);
 368       putc ('\n', stdout);
 369
 370       fputs (_("\
 371 THINGS is a list of comma separated words that can include:\n\
 372   `state'        describe the states\n\
 373   `itemset'      complete the core item sets with their closure\n\
 374   `lookahead'    explicitly associate lookahead tokens to items\n\
 375   `solved'       describe shift/reduce conflicts solving\n\
 376   `all'          include all the above information\n\
 377   `none'         disable the report\n\
 378 "), stdout);
 379
 380       putc ('\n', stdout);
 381       printf (_("Report bugs to <%s>.\n"), PACKAGE_BUGREPORT);
 382       printf (_("%s home page: <%s>.\n"), PACKAGE_NAME, PACKAGE_URL);
 383       fputs (_("General help using GNU software: "
 384                "<http://www.gnu.org/gethelp/>.\n"),
 385              stdout);
 386       /* Don't output this redundant message for English locales.
 387          Note we still output for 'C' so that it gets included in the
 388          man page.  */
 389       const char *lc_messages = setlocale (LC_MESSAGES, NULL);
 390       if (lc_messages && !STREQ (lc_messages, "en_"))
 391         /* TRANSLATORS: Replace LANG_CODE in this URL with your language
 392            code <http://translationproject.org/team/LANG_CODE.html> to
 393            form one of the URLs at http://translationproject.org/team/.
 394            Otherwise, replace the entire URL with your translation team's
 395            email address.  */
 396         fputs (_("Report translation bugs to "
 397                  "<http://translationproject.org/team/>.\n"), stdout);
 398       fputs (_("For complete documentation, run: info bison.\n"), stdout);
 399     }
 400
 401   exit (status);
 402 }
 403
 404
 405 /*------------------------------.
 406 | Display the version message.  |
 407 `------------------------------*/
 408
 409 static void
 410 version (void)
 411 {
 412   /* Some efforts were made to ease the translators' task, please
 413      continue.  */
 414   printf (_("bison (GNU Bison) %s"), VERSION);
 415   putc ('\n', stdout);
 416   fputs (_("Written by Robert Corbett and Richard Stallman.\n"), stdout);
 417   putc ('\n', stdout);
 418
 419   fprintf (stdout,
 420            _("Copyright (C) %d Free Software Foundation, Inc.\n"),
 421            PACKAGE_COPYRIGHT_YEAR);
 422
 423   fputs (_("\
 424 This is free software; see the source for copying conditions.  There is NO\n\
 425 warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\
 426 "),
 427          stdout);
 428 }
 429
 430
 431 /*-------------------------------------.
 432 | --skeleton and --language handling.  |
 433 `--------------------------------------*/
 434
 435 void
 436 skeleton_arg (char const *arg, int prio, location loc)
 437 {
 438   if (prio < skeleton_prio)
 439     {
 440       skeleton_prio = prio;
 441       skeleton = arg;
 442     }
 443   else if (prio == skeleton_prio)
 444     complain (&loc, complaint,
 445               _("multiple skeleton declarations are invalid"));
 446 }
 447
 448 void
 449 language_argmatch (char const *arg, int prio, location loc)
 450 {
 451   char const *msg;
 452
 453   if (prio < language_prio)
 454     {
 455       int i;
 456       for (i = 0; valid_languages[i].language[0]; i++)
 457         if (c_strcasecmp (arg, valid_languages[i].language) == 0)
 458           {
 459             language_prio = prio;
 460             language = &valid_languages[i];
 461             return;
 462           }
 463       msg = _("%s: invalid language");
 464     }
 465   else if (language_prio == prio)
 466     msg = _("multiple language declarations are invalid");
 467   else
 468     return;
 469
 470   complain (&loc, complaint, msg, quotearg_colon (arg));
 471 }
 472
 473 /*----------------------.
 474 | Process the options.  |
 475 `----------------------*/
 476
 477 /* Shorts options.
 478    Should be computed from long_options.  */
 479 static char const short_options[] =
 480   "D:"
 481   "F:"
 482   "L:"
 483   "S:"
 484   "T::"
 485   "V"
 486   "W::"
 487   "b:"
 488   "d"
 489   "e"
 490   "g::"
 491   "h"
 492   "k"
 493   "l"
 494   "n"
 495   "o:"
 496   "p:"
 497   "r:"
 498   "t"
 499   "v"
 500   "x::"
 501   "y"
 502   ;
 503
 504 /* Values for long options that do not have single-letter equivalents.  */
 505 enum
 506 {
 507   LOCATIONS_OPTION = CHAR_MAX + 1,
 508   PRINT_LOCALEDIR_OPTION,
 509   PRINT_DATADIR_OPTION,
 510   REPORT_FILE_OPTION
 511 };
 512
 513 static struct option const long_options[] =
 514 {
 515   /* Operation modes. */
 516   { "help",            no_argument,       0,   'h' },
 517   { "version",         no_argument,       0,   'V' },
 518   { "print-localedir", no_argument,       0,   PRINT_LOCALEDIR_OPTION },
 519   { "print-datadir",   no_argument,       0,   PRINT_DATADIR_OPTION   },
 520   { "warnings",        optional_argument, 0,   'W' },
 521
 522   /* Parser. */
 523   { "name-prefix",   required_argument,   0,   'p' },
 524   { "include",       required_argument,   0,   'I' },
 525
 526   /* Output. */
 527   { "file-prefix", required_argument,   0,   'b' },
 528   { "output",      required_argument,   0,   'o' },
 529   { "output-file", required_argument,   0,   'o' },
 530   { "graph",       optional_argument,   0,   'g' },
 531   { "xml",         optional_argument,   0,   'x' },
 532   { "report",      required_argument,   0,   'r' },
 533   { "report-file", required_argument,   0,   REPORT_FILE_OPTION },
 534   { "verbose",     no_argument,         0,   'v' },
 535
 536   /* Hidden. */
 537   { "trace",         optional_argument,   0,     'T' },
 538
 539   /* Output.  */
 540   { "defines",     optional_argument,   0,   'd' },
 541
 542   /* Operation modes.  */
 543   { "fixed-output-files", no_argument,  0,   'y' },
 544   { "yacc",               no_argument,  0,   'y' },
 545
 546   /* Parser.  */
 547   { "debug",          no_argument,               0,   't' },
 548   { "define",         required_argument,         0,   'D' },
 549   { "force-define",   required_argument,         0,   'F' },
 550   { "locations",      no_argument,               0, LOCATIONS_OPTION },
 551   { "no-lines",       no_argument,               0,   'l' },
 552   { "raw",            no_argument,               0,     0 },
 553   { "skeleton",       required_argument,         0,   'S' },
 554   { "language",       required_argument,         0,   'L' },
 555   { "token-table",    no_argument,               0,   'k' },
 556
 557   {0, 0, 0, 0}
 558 };
 559
 560 /* Under DOS, there is no difference on the case.  This can be
 561    troublesome when looking for `.tab' etc.  */
 562 #ifdef MSDOS
 563 # define AS_FILE_NAME(File) (strlwr (File), (File))
 564 #else
 565 # define AS_FILE_NAME(File) (File)
 566 #endif
 567
 568 /* Build a location for the current command line argument. */
 569 static
 570 location
 571 command_line_location (void)
 572 {
 573   location res;
 574   /* "<command line>" is used in GCC's messages about -D. */
 575   boundary_set (&res.start, uniqstr_new ("<command line>"), optind, -1);
 576   res.end = res.start;
 577   return res;
 578 }
 579
 580
 581 void
 582 getargs (int argc, char *argv[])
 583 {
 584   int c;
 585
 586   while ((c = getopt_long (argc, argv, short_options, long_options, NULL))
 587          != -1)
 588     switch (c)
 589       {
 590         /* ASCII Sorting for short options (i.e., upper case then
 591            lower case), and then long-only options.  */
 592
 593       case 0:
 594         /* Certain long options cause getopt_long to return 0.  */
 595         break;
 596
 597       case 'D': /* -DNAME[=VALUE]. */
 598       case 'F': /* -FNAME[=VALUE]. */
 599         {
 600           char* name = optarg;
 601           char* value = strchr (optarg, '=');
 602           if (value)
 603             *value++ = 0;
 604           muscle_percent_define_insert (name, command_line_location (),
 605                                         value ? value : "",
 606                                         c == 'D' ? MUSCLE_PERCENT_DEFINE_D
 607                                                  : MUSCLE_PERCENT_DEFINE_F);
 608         }
 609         break;
 610
 611       case 'I':
 612         include = AS_FILE_NAME (optarg);
 613         break;
 614
 615       case 'L':
 616         language_argmatch (optarg, command_line_prio,
 617                            command_line_location ());
 618         break;
 619
 620       case 'S':
 621         skeleton_arg (AS_FILE_NAME (optarg), command_line_prio,
 622                       command_line_location ());
 623         break;
 624
 625       case 'T':
 626         FLAGS_ARGMATCH (trace, optarg, trace_all);
 627         break;
 628
 629       case 'V':
 630         version ();
 631         exit (EXIT_SUCCESS);
 632
 633       case 'W':
 634         FLAGS_ARGMATCH (warnings, optarg, Wall);
 635         break;
 636
 637       case 'b':
 638         spec_file_prefix = AS_FILE_NAME (optarg);
 639         break;
 640
 641       case 'd':
 642         /* Here, the -d and --defines options are differentiated.  */
 643         defines_flag = true;
 644         if (optarg)
 645           {
 646             free (spec_defines_file);
 647             spec_defines_file = xstrdup (AS_FILE_NAME (optarg));
 648           }
 649         break;
 650
 651       case 'g':
 652         graph_flag = true;
 653         if (optarg)
 654           {
 655             free (spec_graph_file);
 656             spec_graph_file = xstrdup (AS_FILE_NAME (optarg));
 657           }
 658         break;
 659
 660       case 'h':
 661         usage (EXIT_SUCCESS);
 662
 663       case 'k':
 664         token_table_flag = true;
 665         break;
 666
 667       case 'l':
 668         no_lines_flag = true;
 669         break;
 670
 671       case 'o':
 672         spec_outfile = AS_FILE_NAME (optarg);
 673         break;
 674
 675       case 'p':
 676         spec_name_prefix = optarg;
 677         break;
 678
 679       case 'r':
 680         FLAGS_ARGMATCH (report, optarg, report_all);
 681         break;
 682
 683       case 't':
 684         muscle_percent_define_insert ("parse.trace",
 685                                       command_line_location (), "",
 686                                       MUSCLE_PERCENT_DEFINE_D);
 687         break;
 688
 689       case 'v':
 690         report_flag |= report_states;
 691         break;
 692
 693       case 'x':
 694         xml_flag = true;
 695         if (optarg)
 696           {
 697             free (spec_xml_file);
 698             spec_xml_file = xstrdup (AS_FILE_NAME (optarg));
 699           }
 700         break;
 701
 702       case 'y':
 703         warnings_flag |= Wyacc;
 704         errors_flag |= Wyacc;
 705         yacc_flag = true;
 706         break;
 707
 708       case LOCATIONS_OPTION:
 709         muscle_percent_define_ensure ("locations",
 710                                       command_line_location (), true);
 711         break;
 712
 713       case PRINT_LOCALEDIR_OPTION:
 714         printf ("%s\n", LOCALEDIR);
 715         exit (EXIT_SUCCESS);
 716
 717       case PRINT_DATADIR_OPTION:
 718         printf ("%s\n", pkgdatadir ());
 719         exit (EXIT_SUCCESS);
 720
 721       case REPORT_FILE_OPTION:
 722         free (spec_verbose_file);
 723         spec_verbose_file = xstrdup (AS_FILE_NAME (optarg));
 724         break;
 725
 726       default:
 727         usage (EXIT_FAILURE);
 728       }
 729
 730   if (argc - optind != 1)
 731     {
 732       if (argc - optind < 1)
 733         error (0, 0, _("%s: missing operand"), quotearg_colon (argv[argc - 1]));
 734       else
 735         error (0, 0, _("extra operand %s"), quote (argv[optind + 1]));
 736       usage (EXIT_FAILURE);
 737     }
 738
 739   current_file = grammar_file = uniqstr_new (argv[optind]);
 740   MUSCLE_INSERT_C_STRING ("file_name", grammar_file);
 741 }
 742
 743 void
 744 tr (char *s, char from, char to)
 745 {
 746   for (; *s; s++)
 747     if (*s == from)
 748       *s = to;
 749 }