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 Free Software Foundation, Inc.
   5
   6    This file is part of Bison, the GNU Compiler Compiler.
   7
   8    Bison is free software; you can redistribute it and/or modify it
   9    under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2, or (at your option)
  11    any later version.
  12
  13    Bison is distributed in the hope that it will be useful, but
  14    WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16    General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with Bison; see the file COPYING.  If not, write to the Free
  20    Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  21    02110-1301, USA.  */
  22
  23 #include <config.h>
  24 #include "system.h"
  25 #include "revision.h"
  26
  27 #include <argmatch.h>
  28 #include <configmake.h>
  29 #include <error.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 "uniqstr.h"
  48
  49 bool debug_flag;
  50 bool defines_flag;
  51 bool graph_flag;
  52 bool locations_flag;
  53 bool no_lines_flag;
  54 bool no_parser_flag;
  55 bool token_table_flag;
  56 bool yacc_flag; /* for -y */
  57
  58 bool error_verbose = false;
  59
  60 bool nondeterministic_parser = false;
  61 bool glr_parser = false;
  62 bool pure_parser = false;
  63 bool push_parser = false;
  64
  65 int report_flag = report_none;
  66 int trace_flag = trace_none;
  67 int warnings_flag = warnings_none;
  68
  69 const char *skeleton = NULL;
  70 const char *include = NULL;
  71
  72 extern char *program_name;
  73
  74
  75 /** Decode an option's set of keys.
  76  *
  77  *  \param option   option being decoded.
  78  *  \paran keys     array of valid subarguments.
  79  *  \param values   array of corresponding (int) values.
  80  *  \param flag     the flags to update
  81  *  \param args     colon separated list of effective subarguments to decode.
  82  *                  If 0, then activate all the flags.
  83  *
  84  *  The special value 0 resets the flags to 0.
  85  */
  86 static void
  87 flags_argmatch (const char *option,
  88                 const char * const keys[], const int values[],
  89                 int *flags, char *args)
  90 {
  91   if (args)
  92     {
  93       args = strtok (args, ",");
  94       while (args)
  95         {
  96           int value = XARGMATCH (option, args, keys, values);
  97           if (value == 0)
  98             *flags = 0;
  99           else
 100             *flags |= value;
 101           args = strtok (NULL, ",");
 102         }
 103     }
 104   else
 105     *flags = ~0;
 106 }
 107
 108 /** Decode a set of sub arguments.
 109  *
 110  *  \param FlagName  the flag familly to update.
 111  *  \param args      the effective sub arguments to decode.
 112  *
 113  *  \arg FlagName_args   the list of keys.
 114  *  \arg FlagName_types  the list of values.
 115  *  \arg FlagName_flag   the flag to update.
 116  */
 117 #define FLAGS_ARGMATCH(FlagName, Args)                                  \
 118   flags_argmatch ("--" #FlagName, FlagName ## _args, FlagName ## _types, \
 119                   &FlagName ## _flag, Args)
 120
 121
 122 /*----------------------.
 123 | --report's handling.  |
 124 `----------------------*/
 125
 126 static const char * const report_args[] =
 127 {
 128   /* In a series of synonyms, present the most meaningful first, so
 129      that argmatch_valid be more readable.  */
 130   "none",
 131   "state", "states",
 132   "itemset", "itemsets",
 133   "lookahead", "lookaheads", "look-ahead",
 134   "solved",
 135   "all",
 136   0
 137 };
 138
 139 static const int report_types[] =
 140 {
 141   report_none,
 142   report_states, report_states,
 143   report_states | report_itemsets, report_states | report_itemsets,
 144   report_states | report_lookahead_tokens,
 145   report_states | report_lookahead_tokens,
 146   report_states | report_lookahead_tokens,
 147   report_states | report_solved_conflicts,
 148   report_all
 149 };
 150
 151 ARGMATCH_VERIFY (report_args, report_types);
 152
 153
 154 /*---------------------.
 155 | --trace's handling.  |
 156 `---------------------*/
 157
 158 static const char * const trace_args[] =
 159 {
 160   /* In a series of synonyms, present the most meaningful first, so
 161      that argmatch_valid be more readable.  */
 162   "none       - no traces",
 163   "scan       - grammar scanner traces",
 164   "parse      - grammar parser traces",
 165   "automaton  - construction of the automaton",
 166   "bitsets    - use of bitsets",
 167   "grammar    - reading, reducing the grammar",
 168   "resource   - memory consumption (where available)",
 169   "sets       - grammar sets: firsts, nullable etc.",
 170   "tools      - m4 invocation",
 171   "m4         - m4 traces",
 172   "skeleton   - skeleton postprocessing",
 173   "time       - time consumption",
 174   "all        - all of the above",
 175   0
 176 };
 177
 178 static const int trace_types[] =
 179 {
 180   trace_none,
 181   trace_scan,
 182   trace_parse,
 183   trace_automaton,
 184   trace_bitsets,
 185   trace_grammar,
 186   trace_resource,
 187   trace_sets,
 188   trace_tools,
 189   trace_m4,
 190   trace_skeleton,
 191   trace_time,
 192   trace_all
 193 };
 194
 195 ARGMATCH_VERIFY (trace_args, trace_types);
 196
 197
 198 /*------------------------.
 199 | --warnings's handling.  |
 200 `------------------------*/
 201
 202 static const char * const warnings_args[] =
 203 {
 204   /* In a series of synonyms, present the most meaningful first, so
 205      that argmatch_valid be more readable.  */
 206   "none       - no warnings",
 207   "yacc       - incompatibilities with POSIX YACC",
 208   "all        - all of the above",
 209   "error      - warnings are errors",
 210   0
 211 };
 212
 213 static const int warnings_types[] =
 214 {
 215   warnings_none,
 216   warnings_yacc,
 217   warnings_all,
 218   warnings_error
 219 };
 220
 221 ARGMATCH_VERIFY (warnings_args, warnings_types);
 222
 223
 224 /*-------------------------------------------.
 225 | Display the help message and exit STATUS.  |
 226 `-------------------------------------------*/
 227
 228 static void usage (int) ATTRIBUTE_NORETURN;
 229
 230 static void
 231 usage (int status)
 232 {
 233   if (status != 0)
 234     fprintf (stderr, _("Try `%s --help' for more information.\n"),
 235              program_name);
 236   else
 237     {
 238       printf (_("Usage: %s [OPTION]... FILE\n"), program_name);
 239       fputs (_("\
 240 Generate LALR(1) and GLR parsers.\n\
 241 \n\
 242 "), stdout);
 243
 244       fputs (_("\
 245 Mandatory arguments to long options are mandatory for short options too.\n\
 246 "), stdout);
 247
 248       fputs (_("\
 249 \n\
 250 Operation modes:\n\
 251   -h, --help                 display this help and exit\n\
 252   -V, --version              output version information and exit\n\
 253       --print-localedir      output directory containing locale-dependent data\n\
 254   -y, --yacc                 emulate POSIX Yacc\n\
 255 \n\
 256 "), stdout);
 257
 258       fputs (_("\
 259 Parser:\n\
 260   -S, --skeleton=FILE        specify the skeleton to use\n\
 261   -t, --debug                instrument the parser for debugging\n\
 262       --locations            enable locations computation\n\
 263   -p, --name-prefix=PREFIX   prepend PREFIX to the external symbols\n\
 264   -l, --no-lines             don't generate `#line' directives\n\
 265   -n, --no-parser            generate the tables only\n\
 266   -k, --token-table          include a table of token names\n\
 267 \n\
 268 "), stdout);
 269
 270       fputs (_("\
 271 Output:\n\
 272   -d, --defines              also produce a header file\n\
 273   -r, --report=THINGS        also produce details on the automaton\n\
 274   -v, --verbose              same as `--report=state'\n\
 275   -b, --file-prefix=PREFIX   specify a PREFIX for output files\n\
 276   -o, --output=FILE          leave output to FILE\n\
 277   -g, --graph                also output a graph of the automaton\n\
 278 \n\
 279 "), stdout);
 280
 281       fputs (_("\
 282 THINGS is a list of comma separated words that can include:\n\
 283   `state'        describe the states\n\
 284   `itemset'      complete the core item sets with their closure\n\
 285   `lookahead'    explicitly associate lookahead tokens to items\n\
 286   `solved'       describe shift/reduce conflicts solving\n\
 287   `all'          include all the above information\n\
 288   `none'         disable the report\n\
 289 "), stdout);
 290
 291       printf (_("\nReport bugs to <%s>.\n"), PACKAGE_BUGREPORT);
 292     }
 293
 294   exit (status);
 295 }
 296
 297
 298 /*------------------------------.
 299 | Display the version message.  |
 300 `------------------------------*/
 301
 302 static void
 303 version (void)
 304 {
 305   /* Some efforts were made to ease the translators' task, please
 306      continue.  */
 307   printf (_("bison (GNU Bison) %s"), VERSION);
 308   putc ('\n', stdout);
 309   printf ("%s", revision);
 310   fputs (_("Written by Robert Corbett and Richard Stallman.\n"), stdout);
 311   putc ('\n', stdout);
 312
 313   fprintf (stdout,
 314            _("Copyright (C) %d Free Software Foundation, Inc.\n"), 2006);
 315
 316   fputs (_("\
 317 This is free software; see the source for copying conditions.  There is NO\n\
 318 warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\
 319 "),
 320          stdout);
 321 }
 322
 323
 324 /*----------------------.
 325 | Process the options.  |
 326 `----------------------*/
 327
 328 /* Shorts options.  */
 329 static char const short_options[] = "yvegdhr:ltknVo:b:p:S:T::W";
 330
 331 /* Values for long options that do not have single-letter equivalents.  */
 332 enum
 333 {
 334   LOCATIONS_OPTION = CHAR_MAX + 1,
 335   PRINT_LOCALEDIR_OPTION
 336 };
 337
 338 static struct option const long_options[] =
 339 {
 340   /* Operation modes. */
 341   { "help",            no_argument,       0,   'h' },
 342   { "version",         no_argument,       0,   'V' },
 343   { "print-localedir", no_argument,       0,   PRINT_LOCALEDIR_OPTION },
 344   { "warnings",        optional_argument, 0,   'W' },
 345
 346   /* Parser. */
 347   { "name-prefix",   required_argument,   0,   'p' },
 348   { "include",       required_argument,   0,   'I' },
 349
 350   /* Output. */
 351   { "file-prefix", required_argument,   0,   'b' },
 352   { "output",      required_argument,   0,   'o' },
 353   { "output-file", required_argument,   0,   'o' },
 354   { "graph",       optional_argument,   0,   'g' },
 355   { "report",      required_argument,   0,   'r' },
 356   { "verbose",     no_argument,         0,   'v' },
 357
 358   /* Hidden. */
 359   { "trace",         optional_argument,   0,     'T' },
 360
 361   /* Output.  */
 362   { "defines",     optional_argument,   0,   'd' },
 363
 364   /* Operation modes.  */
 365   { "fixed-output-files", no_argument,  0,   'y' },
 366   { "yacc",               no_argument,  0,   'y' },
 367
 368   /* Parser.  */
 369   { "debug",          no_argument,               0,   't' },
 370   { "locations",      no_argument,               0, LOCATIONS_OPTION },
 371   { "no-lines",       no_argument,               0,   'l' },
 372   { "no-parser",      no_argument,               0,   'n' },
 373   { "raw",            no_argument,               0,     0 },
 374   { "skeleton",       required_argument,         0,   'S' },
 375   { "token-table",    no_argument,               0,   'k' },
 376
 377   {0, 0, 0, 0}
 378 };
 379
 380 /* Under DOS, there is no difference on the case.  This can be
 381    troublesome when looking for `.tab' etc.  */
 382 #ifdef MSDOS
 383 # define AS_FILE_NAME(File) (strlwr (File), (File))
 384 #else
 385 # define AS_FILE_NAME(File) (File)
 386 #endif
 387
 388 void
 389 getargs (int argc, char *argv[])
 390 {
 391   int c;
 392
 393   while ((c = getopt_long (argc, argv, short_options, long_options, NULL))
 394          != -1)
 395     switch (c)
 396       {
 397       case 0:
 398         /* Certain long options cause getopt_long to return 0.  */
 399         break;
 400
 401       case 'b':
 402         spec_file_prefix = AS_FILE_NAME (optarg);
 403         break;
 404
 405       case 'g':
 406         /* Here, the -g and --graph=FILE options are differentiated.  */
 407         graph_flag = true;
 408         if (optarg)
 409           spec_graph_file = AS_FILE_NAME (optarg);
 410         break;
 411
 412       case 'h':
 413         usage (EXIT_SUCCESS);
 414
 415       case 'S':
 416         skeleton = AS_FILE_NAME (optarg);
 417         break;
 418
 419       case 'I':
 420         include = AS_FILE_NAME (optarg);
 421         break;
 422
 423       case 'd':
 424         /* Here, the -d and --defines options are differentiated.  */
 425         defines_flag = true;
 426         if (optarg)
 427           spec_defines_file = AS_FILE_NAME (optarg);
 428         break;
 429
 430       case 'k':
 431         token_table_flag = true;
 432         break;
 433
 434       case 'l':
 435         no_lines_flag = true;
 436         break;
 437
 438       case 'n':
 439         no_parser_flag = true;
 440         break;
 441
 442       case 'o':
 443         spec_outfile = AS_FILE_NAME (optarg);
 444         break;
 445
 446       case 'p':
 447         spec_name_prefix = optarg;
 448         break;
 449
 450       case 'r':
 451         FLAGS_ARGMATCH (report, optarg);
 452         break;
 453
 454       case 'T':
 455         FLAGS_ARGMATCH (trace, optarg);
 456         break;
 457
 458       case 't':
 459         debug_flag = true;
 460         break;
 461
 462       case 'V':
 463         version ();
 464         exit (EXIT_SUCCESS);
 465
 466       case 'v':
 467         report_flag |= report_states;
 468         break;
 469
 470       case 'y':
 471         yacc_flag = true;
 472         break;
 473
 474       case 'W':
 475         if (optarg)
 476           FLAGS_ARGMATCH (warnings, optarg);
 477         else
 478           warnings_flag |= warnings_all;
 479         break;
 480
 481       case LOCATIONS_OPTION:
 482         locations_flag = true;
 483         break;
 484
 485       case PRINT_LOCALEDIR_OPTION:
 486         printf ("%s\n", LOCALEDIR);
 487         exit (EXIT_SUCCESS);
 488
 489       default:
 490         usage (EXIT_FAILURE);
 491       }
 492
 493   if (argc - optind != 1)
 494     {
 495       if (argc - optind < 1)
 496         error (0, 0, _("missing operand after `%s'"), argv[argc - 1]);
 497       else
 498         error (0, 0, _("extra operand `%s'"), argv[optind + 1]);
 499       usage (EXIT_FAILURE);
 500     }
 501
 502   current_file = grammar_file = uniqstr_new (argv[optind]);
 503 }