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, 2007, 2008, 2009 Free Software 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_none;
  63
  64 static struct bison_language const valid_languages[] = {
  65   { "c", "c-skel.m4", ".c", ".h", true },
  66   { "c++", "c++-skel.m4", ".cc", ".hh", true },
  67   { "java", "java-skel.m4", ".java", ".java", false },
  68   { "", "", "", "", false }
  69 };
  70
  71 int skeleton_prio = default_prio;
  72 const char *skeleton = NULL;
  73 int language_prio = default_prio;
  74 struct bison_language const *language = &valid_languages[0];
  75 const char *include = NULL;
  76
  77 char *program_name;
  78
  79
  80 /** Decode an option's set of keys.
  81  *
  82  *  \param option   option being decoded.
  83  *  \param keys     array of valid subarguments.
  84  *  \param values   array of corresponding (int) values.
  85  *  \param flags    the flags to update
  86  *  \param args     comma separated list of effective subarguments to decode.
  87  *                  If 0, then activate all the flags.
  88  *
  89  *  If VALUE != 0 then KEY sets flags and no-KEY clears them.
  90  *  If VALUE == 0 then KEY clears all flags and no-KEY sets all flags.
  91  *  Thus no-none = all and no-all = none.
  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 no = strncmp (args, "no-", 3) == 0 ? 3 : 0;
 104           int value = XARGMATCH (option, args + no, keys, values);
 105           if (value == 0)
 106             if (no)
 107               *flags = ~0;
 108             else
 109               *flags = 0;
 110           else
 111             if (no)
 112               *flags &= ~value;
 113             else
 114               *flags |= value;
 115           args = strtok (NULL, ",");
 116         }
 117     }
 118   else
 119     *flags = ~0;
 120 }
 121
 122 /** Decode a set of sub arguments.
 123  *
 124  *  \param FlagName  the flag familly to update.
 125  *  \param Args      the effective sub arguments to decode.
 126  *
 127  *  \arg FlagName_args   the list of keys.
 128  *  \arg FlagName_types  the list of values.
 129  *  \arg FlagName_flag   the flag to update.
 130  */
 131 #define FLAGS_ARGMATCH(FlagName, Args)                                  \
 132   flags_argmatch ("--" #FlagName, FlagName ## _args, FlagName ## _types, \
 133                   &FlagName ## _flag, Args)
 134
 135
 136 /*----------------------.
 137 | --report's handling.  |
 138 `----------------------*/
 139
 140 static const char * const report_args[] =
 141 {
 142   /* In a series of synonyms, present the most meaningful first, so
 143      that argmatch_valid be more readable.  */
 144   "none",
 145   "state", "states",
 146   "itemset", "itemsets",
 147   "lookahead", "lookaheads", "look-ahead",
 148   "solved",
 149   "all",
 150   0
 151 };
 152
 153 static const int report_types[] =
 154 {
 155   report_none,
 156   report_states, report_states,
 157   report_states | report_itemsets, report_states | report_itemsets,
 158   report_states | report_lookahead_tokens,
 159   report_states | report_lookahead_tokens,
 160   report_states | report_lookahead_tokens,
 161   report_states | report_solved_conflicts,
 162   report_all
 163 };
 164
 165 ARGMATCH_VERIFY (report_args, report_types);
 166
 167
 168 /*---------------------.
 169 | --trace's handling.  |
 170 `---------------------*/
 171
 172 static const char * const trace_args[] =
 173 {
 174   /* In a series of synonyms, present the most meaningful first, so
 175      that argmatch_valid be more readable.  */
 176   "none       - no traces",
 177   "scan       - grammar scanner traces",
 178   "parse      - grammar parser traces",
 179   "automaton  - construction of the automaton",
 180   "bitsets    - use of bitsets",
 181   "grammar    - reading, reducing the grammar",
 182   "resource   - memory consumption (where available)",
 183   "sets       - grammar sets: firsts, nullable etc.",
 184   "muscles    - m4 definitions passed to the skeleton",
 185   "tools      - m4 invocation",
 186   "m4         - m4 traces",
 187   "skeleton   - skeleton postprocessing",
 188   "time       - time consumption",
 189   "ielr       - IELR conversion",
 190   "all        - all of the above",
 191   0
 192 };
 193
 194 static const int trace_types[] =
 195 {
 196   trace_none,
 197   trace_scan,
 198   trace_parse,
 199   trace_automaton,
 200   trace_bitsets,
 201   trace_grammar,
 202   trace_resource,
 203   trace_sets,
 204   trace_muscles,
 205   trace_tools,
 206   trace_m4,
 207   trace_skeleton,
 208   trace_time,
 209   trace_ielr,
 210   trace_all
 211 };
 212
 213 ARGMATCH_VERIFY (trace_args, trace_types);
 214
 215
 216 /*------------------------.
 217 | --warnings's handling.  |
 218 `------------------------*/
 219
 220 static const char * const warnings_args[] =
 221 {
 222   /* In a series of synonyms, present the most meaningful first, so
 223      that argmatch_valid be more readable.  */
 224   "none            - no warnings",
 225   "midrule-values  - unset or unused midrule values",
 226   "yacc            - incompatibilities with POSIX Yacc",
 227   "all             - all of the above",
 228   "error           - warnings are errors",
 229   0
 230 };
 231
 232 static const int warnings_types[] =
 233 {
 234   warnings_none,
 235   warnings_midrule_values,
 236   warnings_yacc,
 237   warnings_all,
 238   warnings_error
 239 };
 240
 241 ARGMATCH_VERIFY (warnings_args, warnings_types);
 242
 243
 244 /*-------------------------------------------.
 245 | Display the help message and exit STATUS.  |
 246 `-------------------------------------------*/
 247
 248 static void usage (int) ATTRIBUTE_NORETURN;
 249
 250 static void
 251 usage (int status)
 252 {
 253   if (status != 0)
 254     fprintf (stderr, _("Try `%s --help' for more information.\n"),
 255              program_name);
 256   else
 257     {
 258       /* For ../build-aux/cross-options.pl to work, use the format:
 259                 ^  -S, --long[=ARGS] (whitespace)
 260          A --long option is required.
 261          Otherwise, add exceptions to ../build-aux/cross-options.pl.  */
 262
 263       printf (_("Usage: %s [OPTION]... FILE\n"), program_name);
 264       fputs (_("\
 265 Generate LALR(1) and GLR parsers.\n\
 266 \n\
 267 "), stdout);
 268
 269       fputs (_("\
 270 Mandatory arguments to long options are mandatory for short options too.\n\
 271 "), stdout);
 272       fputs (_("\
 273 The same is true for optional arguments.\n\
 274 "), stdout);
 275
 276       fputs (_("\
 277 \n\
 278 Operation modes:\n\
 279   -h, --help                 display this help and exit\n\
 280   -V, --version              output version information and exit\n\
 281       --print-localedir      output directory containing locale-dependent data\n\
 282       --print-datadir        output directory containing skeletons and XSLT\n\
 283   -y, --yacc                 emulate POSIX Yacc\n\
 284   -W, --warnings[=CATEGORY]  report the warnings falling in CATEGORY\n\
 285 \n\
 286 "), stdout);
 287
 288       fputs (_("\
 289 Parser:\n\
 290   -L, --language=LANGUAGE    specify the output programming language\n\
 291                              (this is an experimental feature)\n\
 292   -S, --skeleton=FILE        specify the skeleton to use\n\
 293   -t, --debug                instrument the parser for tracing\n\
 294                              same as `-Dparse.trace'\n\
 295       --locations            enable location support\n\
 296   -D, --define=NAME[=VALUE]  same as `%define NAME \"VALUE\"'\n\
 297   -p, --name-prefix=PREFIX   prepend PREFIX to the external symbols\n\
 298   -l, --no-lines             don't generate `#line' directives\n\
 299   -k, --token-table          include a table of token names\n\
 300 \n\
 301 "), stdout);
 302
 303       /* Keep -d and --defines separate so that ../build-aux/cross-options.pl
 304        * won't assume that -d also takes an argument.  */
 305       fputs (_("\
 306 Output:\n\
 307       --defines[=FILE]       also produce a header file\n\
 308   -d                         likewise but cannot specify FILE (for POSIX Yacc)\n\
 309   -r, --report=THINGS        also produce details on the automaton\n\
 310       --report-file=FILE     write report to FILE\n\
 311   -v, --verbose              same as `--report=state'\n\
 312   -b, --file-prefix=PREFIX   specify a PREFIX for output files\n\
 313   -o, --output=FILE          leave output to FILE\n\
 314   -g, --graph[=FILE]         also output a graph of the automaton\n\
 315   -x, --xml[=FILE]           also output an XML report of the automaton\n\
 316                              (the XML schema is experimental)\n\
 317 \n\
 318 "), stdout);
 319
 320       fputs (_("\
 321 Warning categories include:\n\
 322   `midrule-values'  unset or unused midrule values\n\
 323   `yacc'            incompatibilities with POSIX Yacc\n\
 324   `all'             all the warnings\n\
 325   `no-CATEGORY'     turn off warnings in CATEGORY\n\
 326   `none'            turn off all the warnings\n\
 327   `error'           treat warnings as errors\n\
 328 \n\
 329 "), stdout);
 330
 331       fputs (_("\
 332 THINGS is a list of comma separated words that can include:\n\
 333   `state'        describe the states\n\
 334   `itemset'      complete the core item sets with their closure\n\
 335   `lookahead'    explicitly associate lookahead tokens to items\n\
 336   `solved'       describe shift/reduce conflicts solving\n\
 337   `all'          include all the above information\n\
 338   `none'         disable the report\n\
 339 "), stdout);
 340
 341       printf (_("\nReport bugs to <%s>.\n"), PACKAGE_BUGREPORT);
 342     }
 343
 344   exit (status);
 345 }
 346
 347
 348 /*------------------------------.
 349 | Display the version message.  |
 350 `------------------------------*/
 351
 352 static void
 353 version (void)
 354 {
 355   /* Some efforts were made to ease the translators' task, please
 356      continue.  */
 357   printf (_("bison (GNU Bison) %s"), VERSION);
 358   putc ('\n', stdout);
 359   fputs (_("Written by Robert Corbett and Richard Stallman.\n"), stdout);
 360   putc ('\n', stdout);
 361
 362   fprintf (stdout,
 363            _("Copyright (C) %d Free Software Foundation, Inc.\n"),
 364            PACKAGE_COPYRIGHT_YEAR);
 365
 366   fputs (_("\
 367 This is free software; see the source for copying conditions.  There is NO\n\
 368 warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\
 369 "),
 370          stdout);
 371 }
 372
 373
 374 /*-------------------------------------.
 375 | --skeleton and --language handling.  |
 376 `--------------------------------------*/
 377
 378 void
 379 skeleton_arg (char const *arg, int prio, location loc)
 380 {
 381   if (prio < skeleton_prio)
 382     {
 383       skeleton_prio = prio;
 384       skeleton = arg;
 385     }
 386   else if (prio == skeleton_prio)
 387     {
 388       char const *msg =
 389         _("multiple skeleton declarations are invalid");
 390       complain_at (loc, msg);
 391     }
 392 }
 393
 394 void
 395 language_argmatch (char const *arg, int prio, location loc)
 396 {
 397   char const *msg;
 398
 399   if (prio < language_prio)
 400     {
 401       int i;
 402       for (i = 0; valid_languages[i].language[0]; i++)
 403         if (c_strcasecmp (arg, valid_languages[i].language) == 0)
 404           {
 405             language_prio = prio;
 406             language = &valid_languages[i];
 407             return;
 408           }
 409       msg = _("invalid language `%s'");
 410     }
 411   else if (language_prio == prio)
 412     msg = _("multiple language declarations are invalid");
 413   else
 414     return;
 415
 416   complain_at (loc, msg, arg);
 417 }
 418
 419 /*----------------------.
 420 | Process the options.  |
 421 `----------------------*/
 422
 423 /* Shorts options.
 424    Should be computed from long_options.  */
 425 static char const short_options[] =
 426   "D:"
 427   "L:"
 428   "S:"
 429   "T::"
 430   "V"
 431   "W::"
 432   "b:"
 433   "d"
 434   "e"
 435   "g::"
 436   "h"
 437   "k"
 438   "l"
 439   "n"
 440   "o:"
 441   "p:"
 442   "r:"
 443   "t"
 444   "v"
 445   "x::"
 446   "y"
 447   ;
 448
 449 /* Values for long options that do not have single-letter equivalents.  */
 450 enum
 451 {
 452   LOCATIONS_OPTION = CHAR_MAX + 1,
 453   PRINT_LOCALEDIR_OPTION,
 454   PRINT_DATADIR_OPTION,
 455   REPORT_FILE_OPTION
 456 };
 457
 458 static struct option const long_options[] =
 459 {
 460   /* Operation modes. */
 461   { "help",            no_argument,       0,   'h' },
 462   { "version",         no_argument,       0,   'V' },
 463   { "print-localedir", no_argument,       0,   PRINT_LOCALEDIR_OPTION },
 464   { "print-datadir",   no_argument,       0,   PRINT_DATADIR_OPTION   },
 465   { "warnings",        optional_argument, 0,   'W' },
 466
 467   /* Parser. */
 468   { "name-prefix",   required_argument,   0,   'p' },
 469   { "include",       required_argument,   0,   'I' },
 470
 471   /* Output. */
 472   { "file-prefix", required_argument,   0,   'b' },
 473   { "output",      required_argument,   0,   'o' },
 474   { "output-file", required_argument,   0,   'o' },
 475   { "graph",       optional_argument,   0,   'g' },
 476   { "xml",         optional_argument,   0,   'x' },
 477   { "report",      required_argument,   0,   'r' },
 478   { "report-file", required_argument,   0,   REPORT_FILE_OPTION },
 479   { "verbose",     no_argument,         0,   'v' },
 480
 481   /* Hidden. */
 482   { "trace",         optional_argument,   0,     'T' },
 483
 484   /* Output.  */
 485   { "defines",     optional_argument,   0,   'd' },
 486
 487   /* Operation modes.  */
 488   { "fixed-output-files", no_argument,  0,   'y' },
 489   { "yacc",               no_argument,  0,   'y' },
 490
 491   /* Parser.  */
 492   { "debug",          no_argument,               0,   't' },
 493   { "define",         required_argument,         0,   'D' },
 494   { "locations",      no_argument,               0, LOCATIONS_OPTION },
 495   { "no-lines",       no_argument,               0,   'l' },
 496   { "raw",            no_argument,               0,     0 },
 497   { "skeleton",       required_argument,         0,   'S' },
 498   { "language",       required_argument,         0,   'L' },
 499   { "token-table",    no_argument,               0,   'k' },
 500
 501   {0, 0, 0, 0}
 502 };
 503
 504 /* Under DOS, there is no difference on the case.  This can be
 505    troublesome when looking for `.tab' etc.  */
 506 #ifdef MSDOS
 507 # define AS_FILE_NAME(File) (strlwr (File), (File))
 508 #else
 509 # define AS_FILE_NAME(File) (File)
 510 #endif
 511
 512 /* Build a location for the current command line argument. */
 513 static
 514 location
 515 command_line_location (void)
 516 {
 517   location res;
 518   /* "<command line>" is used in GCC's messages about -D. */
 519   boundary_set (&res.start, uniqstr_new ("<command line>"), optind, -1);
 520   res.end = res.start;
 521   return res;
 522 }
 523
 524
 525 void
 526 getargs (int argc, char *argv[])
 527 {
 528   int c;
 529
 530   while ((c = getopt_long (argc, argv, short_options, long_options, NULL))
 531          != -1)
 532     switch (c)
 533       {
 534         /* ASCII Sorting for short options (i.e., upper case then
 535            lower case), and then long-only options.  */
 536
 537       case 0:
 538         /* Certain long options cause getopt_long to return 0.  */
 539         break;
 540
 541       case 'D': /* -DNAME[=VALUE]. */
 542         {
 543           char* name = optarg;
 544           char* value = strchr (optarg, '=');
 545           if (value)
 546             *value++ = 0;
 547           muscle_percent_define_insert (name, command_line_location (),
 548                                         value ? value : "");
 549         }
 550         break;
 551
 552       case 'I':
 553         include = AS_FILE_NAME (optarg);
 554         break;
 555
 556       case 'L':
 557         language_argmatch (optarg, command_line_prio,
 558                            command_line_location ());
 559         break;
 560
 561       case 'S':
 562         skeleton_arg (AS_FILE_NAME (optarg), command_line_prio,
 563                       command_line_location ());
 564         break;
 565
 566       case 'T':
 567         FLAGS_ARGMATCH (trace, optarg);
 568         break;
 569
 570       case 'V':
 571         version ();
 572         exit (EXIT_SUCCESS);
 573
 574       case 'W':
 575         if (optarg)
 576           FLAGS_ARGMATCH (warnings, optarg);
 577         else
 578           warnings_flag |= warnings_all;
 579         break;
 580
 581       case 'b':
 582         spec_file_prefix = AS_FILE_NAME (optarg);
 583         break;
 584
 585       case 'd':
 586         /* Here, the -d and --defines options are differentiated.  */
 587         defines_flag = true;
 588         if (optarg)
 589           spec_defines_file = xstrdup (AS_FILE_NAME (optarg));
 590         break;
 591
 592       case 'g':
 593         graph_flag = true;
 594         if (optarg)
 595           spec_graph_file = xstrdup (AS_FILE_NAME (optarg));
 596         break;
 597
 598       case 'h':
 599         usage (EXIT_SUCCESS);
 600
 601       case 'k':
 602         token_table_flag = true;
 603         break;
 604
 605       case 'l':
 606         no_lines_flag = true;
 607         break;
 608
 609       case 'o':
 610         spec_outfile = AS_FILE_NAME (optarg);
 611         break;
 612
 613       case 'p':
 614         spec_name_prefix = optarg;
 615         break;
 616
 617       case 'r':
 618         FLAGS_ARGMATCH (report, optarg);
 619         break;
 620
 621       case 't':
 622         muscle_percent_define_insert ("parse.trace",
 623                                       command_line_location (), "");
 624         break;
 625
 626       case 'v':
 627         report_flag |= report_states;
 628         break;
 629
 630       case 'x':
 631         xml_flag = true;
 632         if (optarg)
 633           spec_xml_file = xstrdup (AS_FILE_NAME (optarg));
 634         break;
 635
 636       case 'y':
 637         yacc_flag = true;
 638         break;
 639
 640       case LOCATIONS_OPTION:
 641         muscle_percent_define_ensure ("locations",
 642                                       command_line_location (), true);
 643         break;
 644
 645       case PRINT_LOCALEDIR_OPTION:
 646         printf ("%s\n", LOCALEDIR);
 647         exit (EXIT_SUCCESS);
 648
 649       case PRINT_DATADIR_OPTION:
 650         printf ("%s\n", compute_pkgdatadir ());
 651         exit (EXIT_SUCCESS);
 652
 653       case REPORT_FILE_OPTION:
 654         spec_verbose_file = xstrdup (AS_FILE_NAME (optarg));
 655         break;
 656
 657       default:
 658         usage (EXIT_FAILURE);
 659       }
 660
 661   if (argc - optind != 1)
 662     {
 663       if (argc - optind < 1)
 664         error (0, 0, _("missing operand after `%s'"), argv[argc - 1]);
 665       else
 666         error (0, 0, _("extra operand `%s'"), argv[optind + 1]);
 667       usage (EXIT_FAILURE);
 668     }
 669
 670   current_file = grammar_file = uniqstr_new (argv[optind]);
 671   MUSCLE_INSERT_C_STRING ("file_name", grammar_file);
 672 }