src/getargs.c

   1 /* Parse command line arguments for Bison.
   2
   3    Copyright (C) 1984, 1986, 1989, 1992, 2000, 2001, 2002, 2003, 2004, 2005
   4    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 "system.h"
  24
  25 #include <argmatch.h>
  26 #include <error.h>
  27
  28 /* Hack to get <getopt.h> to declare getopt with a prototype.  */
  29 #if lint && ! defined __GNU_LIBRARY__
  30 # define __GNU_LIBRARY__
  31 # define HACK_FOR___GNU_LIBRARY___PROTOTYPE 1
  32 #endif
  33
  34 #include <getopt.h>
  35
  36 #ifdef HACK_FOR___GNU_LIBRARY___PROTOTYPE
  37 # undef __GNU_LIBRARY__
  38 # undef HACK_FOR___GNU_LIBRARY___PROTOTYPE
  39 #endif
  40
  41 #include "complain.h"
  42 #include "files.h"
  43 #include "getargs.h"
  44 #include "uniqstr.h"
  45
  46 bool debug_flag;
  47 bool defines_flag;
  48 bool locations_flag;
  49 bool no_lines_flag;
  50 bool no_parser_flag;
  51 int report_flag = report_none;
  52 bool token_table_flag;
  53 bool yacc_flag; /* for -y */
  54 bool graph_flag;
  55 int trace_flag = trace_none;
  56
  57 bool nondeterministic_parser = false;
  58 bool glr_parser = false;
  59 bool pure_parser = false;
  60
  61 const char *skeleton = NULL;
  62 const char *include = NULL;
  63
  64 extern char *program_name;
  65
  66
  67 /*---------------------.
  68 | --trace's handling.  |
  69 `---------------------*/
  70
  71 static const char * const trace_args[] =
  72 {
  73   /* In a series of synonyms, present the most meaningful first, so
  74      that argmatch_valid be more readable.  */
  75   "none       - no report",
  76   "scan       - grammar scanner traces",
  77   "parse      - grammar parser traces",
  78   "automaton  - contruction of the automaton",
  79   "bitsets    - use of bitsets",
  80   "grammar    - reading, reducing of the grammar",
  81   "resource   - memory consumption (where available)",
  82   "sets       - grammar sets: firsts, nullable etc.",
  83   "tools      - m4 invocation and preserve the temporary file",
  84   "skeleton   - skeleton postprocessing",
  85   "time       - time consumption",
  86   "all        - all of the above",
  87   0
  88 };
  89
  90 static const int trace_types[] =
  91 {
  92   trace_none,
  93   trace_scan,
  94   trace_parse,
  95   trace_automaton,
  96   trace_bitsets,
  97   trace_grammar,
  98   trace_resource,
  99   trace_sets,
 100   trace_tools,
 101   trace_skeleton,
 102   trace_time,
 103   trace_all
 104 };
 105
 106
 107 static void
 108 trace_argmatch (char *args)
 109 {
 110   verify (trace_constraint, ARGMATCH_CONSTRAINT (trace_args, trace_types));
 111   if (args)
 112     {
 113       args = strtok (args, ",");
 114       do
 115         {
 116           int trace = XARGMATCH ("--trace", args,
 117                                  trace_args, trace_types);
 118           if (trace == trace_none)
 119             trace_flag = trace_none;
 120           else
 121             trace_flag |= trace;
 122         }
 123       while ((args = strtok (NULL, ",")));
 124     }
 125   else
 126     trace_flag = trace_all;
 127 }
 128
 129
 130 /*----------------------.
 131 | --report's handling.  |
 132 `----------------------*/
 133
 134 static const char * const report_args[] =
 135 {
 136   /* In a series of synonyms, present the most meaningful first, so
 137      that argmatch_valid be more readable.  */
 138   "none",
 139   "state", "states",
 140   "itemset", "itemsets",
 141   "look-ahead", "lookahead", "lookaheads",
 142   "solved",
 143   "all",
 144   0
 145 };
 146
 147 static const int report_types[] =
 148 {
 149   report_none,
 150   report_states, report_states,
 151   report_states | report_itemsets, report_states | report_itemsets,
 152   report_states | report_look_ahead_tokens,
 153   report_states | report_look_ahead_tokens,
 154   report_states | report_look_ahead_tokens,
 155   report_states | report_solved_conflicts,
 156   report_all
 157 };
 158
 159
 160 static void
 161 report_argmatch (char *args)
 162 {
 163   verify (report_constraint, ARGMATCH_CONSTRAINT (report_args, report_types));
 164   args = strtok (args, ",");
 165   do
 166     {
 167       int report = XARGMATCH ("--report", args,
 168                               report_args, report_types);
 169       if (report == report_none)
 170         report_flag = report_none;
 171       else
 172         report_flag |= report;
 173     }
 174   while ((args = strtok (NULL, ",")));
 175 }
 176
 177
 178 /*-------------------------------------------.
 179 | Display the help message and exit STATUS.  |
 180 `-------------------------------------------*/
 181
 182 static void usage (int) ATTRIBUTE_NORETURN;
 183
 184 static void
 185 usage (int status)
 186 {
 187   if (status != 0)
 188     fprintf (stderr, _("Try `%s --help' for more information.\n"),
 189              program_name);
 190   else
 191     {
 192       /* Some efforts were made to ease the translators' task, please
 193          continue.  */
 194       fputs (_("\
 195 GNU bison generates parsers for LALR(1) grammars.\n"), stdout);
 196       putc ('\n', stdout);
 197
 198       fprintf (stdout, _("\
 199 Usage: %s [OPTION]... FILE\n"), program_name);
 200       putc ('\n', stdout);
 201
 202       fputs (_("\
 203 If a long option shows an argument as mandatory, then it is mandatory\n\
 204 for the equivalent short option also.  Similarly for optional arguments.\n"),
 205              stdout);
 206       putc ('\n', stdout);
 207
 208       fputs (_("\
 209 Operation modes:\n\
 210   -h, --help                 display this help and exit\n\
 211   -V, --version              output version information and exit\n\
 212       --print-localedir      output directory containing locale-dependent data\n\
 213   -y, --yacc                 emulate POSIX yacc\n"), stdout);
 214       putc ('\n', stdout);
 215
 216       fputs (_("\
 217 Parser:\n\
 218   -S, --skeleton=FILE        specify the skeleton to use\n\
 219   -t, --debug                instrument the parser for debugging\n\
 220       --locations            enable locations computation\n\
 221   -p, --name-prefix=PREFIX   prepend PREFIX to the external symbols\n\
 222   -l, --no-lines             don't generate `#line' directives\n\
 223   -n, --no-parser            generate the tables only\n\
 224   -k, --token-table          include a table of token names\n\
 225 "), stdout);
 226       putc ('\n', stdout);
 227
 228       fputs (_("\
 229 Output:\n\
 230   -d, --defines              also produce a header file\n\
 231   -r, --report=THINGS        also produce details on the automaton\n\
 232   -v, --verbose              same as `--report=state'\n\
 233   -b, --file-prefix=PREFIX   specify a PREFIX for output files\n\
 234   -o, --output=FILE          leave output to FILE\n\
 235   -g, --graph                also produce a VCG description of the automaton\n\
 236 "), stdout);
 237       putc ('\n', stdout);
 238
 239       fputs (_("\
 240 THINGS is a list of comma separated words that can include:\n\
 241   `state'        describe the states\n\
 242   `itemset'      complete the core item sets with their closure\n\
 243   `look-ahead'   explicitly associate look-ahead tokens to items\n\
 244   `solved'       describe shift/reduce conflicts solving\n\
 245   `all'          include all the above information\n\
 246   `none'         disable the report\n\
 247 "), stdout);
 248       putc ('\n', stdout);
 249
 250       fputs (_("\
 251 Report bugs to <bug-bison@gnu.org>.\n"), stdout);
 252     }
 253
 254   exit (status);
 255 }
 256
 257
 258 /*------------------------------.
 259 | Display the version message.  |
 260 `------------------------------*/
 261
 262 static void
 263 version (void)
 264 {
 265   /* Some efforts were made to ease the translators' task, please
 266      continue.  */
 267   printf (_("bison (GNU Bison) %s"), VERSION);
 268   putc ('\n', stdout);
 269   fputs (_("Written by Robert Corbett and Richard Stallman.\n"), stdout);
 270   putc ('\n', stdout);
 271
 272   fprintf (stdout,
 273            _("Copyright (C) %d Free Software Foundation, Inc.\n"), 2005);
 274
 275   fputs (_("\
 276 This is free software; see the source for copying conditions.  There is NO\n\
 277 warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\
 278 "),
 279          stdout);
 280 }
 281
 282
 283 /*----------------------.
 284 | Process the options.  |
 285 `----------------------*/
 286
 287 /* Shorts options.  */
 288 static char const short_options[] = "yvegdhr:ltknVo:b:p:S:T::";
 289
 290 /* Values for long options that do not have single-letter equivalents.  */
 291 enum
 292 {
 293   LOCATIONS_OPTION = CHAR_MAX + 1,
 294   PRINT_LOCALEDIR_OPTION
 295 };
 296
 297 static struct option const long_options[] =
 298 {
 299   /* Operation modes. */
 300   { "help",            no_argument,     0,   'h' },
 301   { "version",         no_argument,     0,   'V' },
 302   { "print-localedir", no_argument,     0,   PRINT_LOCALEDIR_OPTION },
 303
 304   /* Parser. */
 305   { "name-prefix",   required_argument,   0,   'p' },
 306   { "include",       required_argument,   0,   'I' },
 307
 308   /* Output. */
 309   { "file-prefix", required_argument,   0,   'b' },
 310   { "output",      required_argument,   0,   'o' },
 311   { "output-file", required_argument,   0,   'o' },
 312   { "graph",       optional_argument,   0,   'g' },
 313   { "report",      required_argument,   0,   'r' },
 314   { "verbose",     no_argument,         0,   'v' },
 315
 316   /* Hidden. */
 317   { "trace",         optional_argument,   0,     'T' },
 318
 319   /* Output.  */
 320   { "defines",     optional_argument,   0,   'd' },
 321
 322   /* Operation modes.  */
 323   { "fixed-output-files", no_argument,  0,   'y' },
 324   { "yacc",               no_argument,  0,   'y' },
 325
 326   /* Parser.  */
 327   { "debug",          no_argument,               0,   't' },
 328   { "locations",      no_argument,               0, LOCATIONS_OPTION },
 329   { "no-lines",       no_argument,               0,   'l' },
 330   { "no-parser",      no_argument,               0,   'n' },
 331   { "raw",            no_argument,               0,     0 },
 332   { "skeleton",       required_argument,         0,   'S' },
 333   { "token-table",    no_argument,               0,   'k' },
 334
 335   {0, 0, 0, 0}
 336 };
 337
 338 /* Under DOS, there is no difference on the case.  This can be
 339    troublesome when looking for `.tab' etc.  */
 340 #ifdef MSDOS
 341 # define AS_FILE_NAME(File) (strlwr (File), (File))
 342 #else
 343 # define AS_FILE_NAME(File) (File)
 344 #endif
 345
 346 void
 347 getargs (int argc, char *argv[])
 348 {
 349   int c;
 350
 351   while ((c = getopt_long (argc, argv, short_options, long_options, NULL))
 352          != -1)
 353     switch (c)
 354       {
 355       case 0:
 356         /* Certain long options cause getopt_long to return 0.  */
 357         break;
 358
 359       case 'y':
 360         yacc_flag = true;
 361         break;
 362
 363       case 'h':
 364         usage (EXIT_SUCCESS);
 365
 366       case 'V':
 367         version ();
 368         exit (EXIT_SUCCESS);
 369
 370       case PRINT_LOCALEDIR_OPTION:
 371         printf ("%s\n", LOCALEDIR);
 372         exit (EXIT_SUCCESS);
 373
 374       case 'g':
 375         /* Here, the -g and --graph=FILE options are differentiated.  */
 376         graph_flag = true;
 377         if (optarg)
 378           spec_graph_file = AS_FILE_NAME (optarg);
 379         break;
 380
 381       case 'v':
 382         report_flag |= report_states;
 383         break;
 384
 385       case 'S':
 386         skeleton = AS_FILE_NAME (optarg);
 387         break;
 388
 389       case 'I':
 390         include = AS_FILE_NAME (optarg);
 391         break;
 392
 393       case 'd':
 394         /* Here, the -d and --defines options are differentiated.  */
 395         defines_flag = true;
 396         if (optarg)
 397           spec_defines_file = AS_FILE_NAME (optarg);
 398         break;
 399
 400       case 'l':
 401         no_lines_flag = true;
 402         break;
 403
 404       case LOCATIONS_OPTION:
 405         locations_flag = true;
 406         break;
 407
 408       case 'k':
 409         token_table_flag = true;
 410         break;
 411
 412       case 'n':
 413         no_parser_flag = true;
 414         break;
 415
 416       case 't':
 417         debug_flag = true;
 418         break;
 419
 420       case 'o':
 421         spec_outfile = AS_FILE_NAME (optarg);
 422         break;
 423
 424       case 'b':
 425         spec_file_prefix = AS_FILE_NAME (optarg);
 426         break;
 427
 428       case 'p':
 429         spec_name_prefix = optarg;
 430         break;
 431
 432       case 'r':
 433         report_argmatch (optarg);
 434         break;
 435
 436       case 'T':
 437         trace_argmatch (optarg);
 438         break;
 439
 440       default:
 441         usage (EXIT_FAILURE);
 442       }
 443
 444   if (argc - optind != 1)
 445     {
 446       if (argc - optind < 1)
 447         error (0, 0, _("missing operand after `%s'"), argv[argc - 1]);
 448       else
 449         error (0, 0, _("extra operand `%s'"), argv[optind + 1]);
 450       usage (EXIT_FAILURE);
 451     }
 452
 453   current_file = grammar_file = uniqstr_new (argv[optind]);
 454 }