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 a deterministic or GLR parser employing LALR(1), IELR(1), or\n\
 266 canonical LR(1) parser tables.\n\
 267 \n\
 268 "), stdout);
 269
 270       fputs (_("\
 271 Mandatory arguments to long options are mandatory for short options too.\n\
 272 "), stdout);
 273       fputs (_("\
 274 The same is true for optional arguments.\n\
 275 "), stdout);
 276
 277       fputs (_("\
 278 \n\
 279 Operation modes:\n\
 280   -h, --help                 display this help and exit\n\
 281   -V, --version              output version information and exit\n\
 282       --print-localedir      output directory containing locale-dependent data\n\
 283       --print-datadir        output directory containing skeletons and XSLT\n\
 284   -y, --yacc                 emulate POSIX Yacc\n\
 285   -W, --warnings[=CATEGORY]  report the warnings falling in CATEGORY\n\
 286 \n\
 287 "), stdout);
 288
 289       fputs (_("\
 290 Parser:\n\
 291   -L, --language=LANGUAGE    specify the output programming language\n\
 292                              (this is an experimental feature)\n\
 293   -S, --skeleton=FILE        specify the skeleton to use\n\
 294   -t, --debug                instrument the parser for tracing\n\
 295                              same as `-Dparse.trace'\n\
 296       --locations            enable location support\n\
 297   -D, --define=NAME[=VALUE]  same as `%define NAME \"VALUE\"'\n\
 298   -p, --name-prefix=PREFIX   prepend PREFIX to the external symbols\n\
 299   -l, --no-lines             don't generate `#line' directives\n\
 300   -k, --token-table          include a table of token names\n\
 301 \n\
 302 "), stdout);
 303
 304       /* Keep -d and --defines separate so that ../build-aux/cross-options.pl
 305        * won't assume that -d also takes an argument.  */
 306       fputs (_("\
 307 Output:\n\
 308       --defines[=FILE]       also produce a header file\n\
 309   -d                         likewise but cannot specify FILE (for POSIX Yacc)\n\
 310   -r, --report=THINGS        also produce details on the automaton\n\
 311       --report-file=FILE     write report to FILE\n\
 312   -v, --verbose              same as `--report=state'\n\
 313   -b, --file-prefix=PREFIX   specify a PREFIX for output files\n\
 314   -o, --output=FILE          leave output to FILE\n\
 315   -g, --graph[=FILE]         also output a graph of the automaton\n\
 316   -x, --xml[=FILE]           also output an XML report of the automaton\n\
 317                              (the XML schema is experimental)\n\
 318 \n\
 319 "), stdout);
 320
 321       fputs (_("\
 322 Warning categories include:\n\
 323   `midrule-values'  unset or unused midrule values\n\
 324   `yacc'            incompatibilities with POSIX Yacc\n\
 325   `all'             all the warnings\n\
 326   `no-CATEGORY'     turn off warnings in CATEGORY\n\
 327   `none'            turn off all the warnings\n\
 328   `error'           treat warnings as errors\n\
 329 \n\
 330 "), stdout);
 331
 332       fputs (_("\
 333 THINGS is a list of comma separated words that can include:\n\
 334   `state'        describe the states\n\
 335   `itemset'      complete the core item sets with their closure\n\
 336   `lookahead'    explicitly associate lookahead tokens to items\n\
 337   `solved'       describe shift/reduce conflicts solving\n\
 338   `all'          include all the above information\n\
 339   `none'         disable the report\n\
 340 "), stdout);
 341
 342       printf (_("\nReport bugs to <%s>.\n"), PACKAGE_BUGREPORT);
 343     }
 344
 345   exit (status);
 346 }
 347
 348
 349 /*------------------------------.
 350 | Display the version message.  |
 351 `------------------------------*/
 352
 353 static void
 354 version (void)
 355 {
 356   /* Some efforts were made to ease the translators' task, please
 357      continue.  */
 358   printf (_("bison (GNU Bison) %s"), VERSION);
 359   putc ('\n', stdout);
 360   fputs (_("Written by Robert Corbett and Richard Stallman.\n"), stdout);
 361   putc ('\n', stdout);
 362
 363   fprintf (stdout,
 364            _("Copyright (C) %d Free Software Foundation, Inc.\n"),
 365            PACKAGE_COPYRIGHT_YEAR);
 366
 367   fputs (_("\
 368 This is free software; see the source for copying conditions.  There is NO\n\
 369 warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\
 370 "),
 371          stdout);
 372 }
 373
 374
 375 /*-------------------------------------.
 376 | --skeleton and --language handling.  |
 377 `--------------------------------------*/
 378
 379 void
 380 skeleton_arg (char const *arg, int prio, location loc)
 381 {
 382   if (prio < skeleton_prio)
 383     {
 384       skeleton_prio = prio;
 385       skeleton = arg;
 386     }
 387   else if (prio == skeleton_prio)
 388     complain_at (loc, _("multiple skeleton declarations are invalid"));
 389 }
 390
 391 void
 392 language_argmatch (char const *arg, int prio, location loc)
 393 {
 394   char const *msg;
 395
 396   if (prio < language_prio)
 397     {
 398       int i;
 399       for (i = 0; valid_languages[i].language[0]; i++)
 400         if (c_strcasecmp (arg, valid_languages[i].language) == 0)
 401           {
 402             language_prio = prio;
 403             language = &valid_languages[i];
 404             return;
 405           }
 406       msg = _("invalid language `%s'");
 407     }
 408   else if (language_prio == prio)
 409     msg = _("multiple language declarations are invalid");
 410   else
 411     return;
 412
 413   complain_at (loc, msg, arg);
 414 }
 415
 416 /*----------------------.
 417 | Process the options.  |
 418 `----------------------*/
 419
 420 /* Shorts options.
 421    Should be computed from long_options.  */
 422 static char const short_options[] =
 423   "D:"
 424   "L:"
 425   "S:"
 426   "T::"
 427   "V"
 428   "W::"
 429   "b:"
 430   "d"
 431   "e"
 432   "g::"
 433   "h"
 434   "k"
 435   "l"
 436   "n"
 437   "o:"
 438   "p:"
 439   "r:"
 440   "t"
 441   "v"
 442   "x::"
 443   "y"
 444   ;
 445
 446 /* Values for long options that do not have single-letter equivalents.  */
 447 enum
 448 {
 449   LOCATIONS_OPTION = CHAR_MAX + 1,
 450   PRINT_LOCALEDIR_OPTION,
 451   PRINT_DATADIR_OPTION,
 452   REPORT_FILE_OPTION
 453 };
 454
 455 static struct option const long_options[] =
 456 {
 457   /* Operation modes. */
 458   { "help",            no_argument,       0,   'h' },
 459   { "version",         no_argument,       0,   'V' },
 460   { "print-localedir", no_argument,       0,   PRINT_LOCALEDIR_OPTION },
 461   { "print-datadir",   no_argument,       0,   PRINT_DATADIR_OPTION   },
 462   { "warnings",        optional_argument, 0,   'W' },
 463
 464   /* Parser. */
 465   { "name-prefix",   required_argument,   0,   'p' },
 466   { "include",       required_argument,   0,   'I' },
 467
 468   /* Output. */
 469   { "file-prefix", required_argument,   0,   'b' },
 470   { "output",      required_argument,   0,   'o' },
 471   { "output-file", required_argument,   0,   'o' },
 472   { "graph",       optional_argument,   0,   'g' },
 473   { "xml",         optional_argument,   0,   'x' },
 474   { "report",      required_argument,   0,   'r' },
 475   { "report-file", required_argument,   0,   REPORT_FILE_OPTION },
 476   { "verbose",     no_argument,         0,   'v' },
 477
 478   /* Hidden. */
 479   { "trace",         optional_argument,   0,     'T' },
 480
 481   /* Output.  */
 482   { "defines",     optional_argument,   0,   'd' },
 483
 484   /* Operation modes.  */
 485   { "fixed-output-files", no_argument,  0,   'y' },
 486   { "yacc",               no_argument,  0,   'y' },
 487
 488   /* Parser.  */
 489   { "debug",          no_argument,               0,   't' },
 490   { "define",         required_argument,         0,   'D' },
 491   { "locations",      no_argument,               0, LOCATIONS_OPTION },
 492   { "no-lines",       no_argument,               0,   'l' },
 493   { "raw",            no_argument,               0,     0 },
 494   { "skeleton",       required_argument,         0,   'S' },
 495   { "language",       required_argument,         0,   'L' },
 496   { "token-table",    no_argument,               0,   'k' },
 497
 498   {0, 0, 0, 0}
 499 };
 500
 501 /* Under DOS, there is no difference on the case.  This can be
 502    troublesome when looking for `.tab' etc.  */
 503 #ifdef MSDOS
 504 # define AS_FILE_NAME(File) (strlwr (File), (File))
 505 #else
 506 # define AS_FILE_NAME(File) (File)
 507 #endif
 508
 509 /* Build a location for the current command line argument. */
 510 static
 511 location
 512 command_line_location (void)
 513 {
 514   location res;
 515   /* "<command line>" is used in GCC's messages about -D. */
 516   boundary_set (&res.start, uniqstr_new ("<command line>"), optind, -1);
 517   res.end = res.start;
 518   return res;
 519 }
 520
 521
 522 void
 523 getargs (int argc, char *argv[])
 524 {
 525   int c;
 526
 527   while ((c = getopt_long (argc, argv, short_options, long_options, NULL))
 528          != -1)
 529     switch (c)
 530       {
 531         /* ASCII Sorting for short options (i.e., upper case then
 532            lower case), and then long-only options.  */
 533
 534       case 0:
 535         /* Certain long options cause getopt_long to return 0.  */
 536         break;
 537
 538       case 'D': /* -DNAME[=VALUE]. */
 539         {
 540           char* name = optarg;
 541           char* value = strchr (optarg, '=');
 542           if (value)
 543             *value++ = 0;
 544           muscle_percent_define_insert (name, command_line_location (),
 545                                         value ? value : "");
 546         }
 547         break;
 548
 549       case 'I':
 550         include = AS_FILE_NAME (optarg);
 551         break;
 552
 553       case 'L':
 554         language_argmatch (optarg, command_line_prio,
 555                            command_line_location ());
 556         break;
 557
 558       case 'S':
 559         skeleton_arg (AS_FILE_NAME (optarg), command_line_prio,
 560                       command_line_location ());
 561         break;
 562
 563       case 'T':
 564         FLAGS_ARGMATCH (trace, optarg);
 565         break;
 566
 567       case 'V':
 568         version ();
 569         exit (EXIT_SUCCESS);
 570
 571       case 'W':
 572         if (optarg)
 573           FLAGS_ARGMATCH (warnings, optarg);
 574         else
 575           warnings_flag |= warnings_all;
 576         break;
 577
 578       case 'b':
 579         spec_file_prefix = AS_FILE_NAME (optarg);
 580         break;
 581
 582       case 'd':
 583         /* Here, the -d and --defines options are differentiated.  */
 584         defines_flag = true;
 585         if (optarg)
 586           spec_defines_file = xstrdup (AS_FILE_NAME (optarg));
 587         break;
 588
 589       case 'g':
 590         graph_flag = true;
 591         if (optarg)
 592           spec_graph_file = xstrdup (AS_FILE_NAME (optarg));
 593         break;
 594
 595       case 'h':
 596         usage (EXIT_SUCCESS);
 597
 598       case 'k':
 599         token_table_flag = true;
 600         break;
 601
 602       case 'l':
 603         no_lines_flag = true;
 604         break;
 605
 606       case 'o':
 607         spec_outfile = AS_FILE_NAME (optarg);
 608         break;
 609
 610       case 'p':
 611         spec_name_prefix = optarg;
 612         break;
 613
 614       case 'r':
 615         FLAGS_ARGMATCH (report, optarg);
 616         break;
 617
 618       case 't':
 619         muscle_percent_define_insert ("parse.trace",
 620                                       command_line_location (), "");
 621         break;
 622
 623       case 'v':
 624         report_flag |= report_states;
 625         break;
 626
 627       case 'x':
 628         xml_flag = true;
 629         if (optarg)
 630           spec_xml_file = xstrdup (AS_FILE_NAME (optarg));
 631         break;
 632
 633       case 'y':
 634         yacc_flag = true;
 635         break;
 636
 637       case LOCATIONS_OPTION:
 638         muscle_percent_define_ensure ("locations",
 639                                       command_line_location (), true);
 640         break;
 641
 642       case PRINT_LOCALEDIR_OPTION:
 643         printf ("%s\n", LOCALEDIR);
 644         exit (EXIT_SUCCESS);
 645
 646       case PRINT_DATADIR_OPTION:
 647         printf ("%s\n", compute_pkgdatadir ());
 648         exit (EXIT_SUCCESS);
 649
 650       case REPORT_FILE_OPTION:
 651         spec_verbose_file = xstrdup (AS_FILE_NAME (optarg));
 652         break;
 653
 654       default:
 655         usage (EXIT_FAILURE);
 656       }
 657
 658   if (argc - optind != 1)
 659     {
 660       if (argc - optind < 1)
 661         error (0, 0, _("missing operand after `%s'"), argv[argc - 1]);
 662       else
 663         error (0, 0, _("extra operand `%s'"), argv[optind + 1]);
 664       usage (EXIT_FAILURE);
 665     }
 666
 667   current_file = grammar_file = uniqstr_new (argv[optind]);
 668   MUSCLE_INSERT_C_STRING ("file_name", grammar_file);
 669 }
 670
 671 void
 672 tr (char *s, char from, char to)
 673 {
 674   for (; *s; s++)
 675     if (*s == from)
 676       *s = to;
 677 }