src/getargs.c

   1 /* Parse command line arguments for Bison.
   2
   3    Copyright (C) 1984, 1986, 1989, 1992, 2000, 2001, 2002
   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., 59 Temple Place - Suite 330, Boston, MA
  21    02111-1307, 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 int debug_flag = 0;
  47 int defines_flag = 0;
  48 int locations_flag = 0;
  49 int no_lines_flag = 0;
  50 int no_parser_flag = 0;
  51 int report_flag = report_none;
  52 int token_table_flag = 0;
  53 int yacc_flag = 0;      /* for -y */
  54 int graph_flag = 0;
  55 int trace_flag = trace_none;
  56
  57 const char *skeleton = NULL;
  58 const char *include = NULL;
  59
  60 extern char *program_name;
  61
  62
  63 /*---------------------.
  64 | --trace's handling.  |
  65 `---------------------*/
  66
  67 static const char * const trace_args[] =
  68 {
  69   /* In a series of synonyms, present the most meaningful first, so
  70      that argmatch_valid be more readable.  */
  71   "none       - no report",
  72   "scan       - grammar scanner traces",
  73   "parse      - grammar parser traces",
  74   "automaton  - contruction of the automaton",
  75   "bitsets    - use of bitsets",
  76   "grammar    - reading, reducing of the grammar",
  77   "resource   - memory consumption (where available)",
  78   "sets       - grammar sets: firsts, nullable etc.",
  79   "tools      - m4 invocation and preserve the temporary file",
  80   "skeleton   - skeleton postprocessing",
  81   "time       - time consumption",
  82   "all        - all of the above",
  83   0
  84 };
  85
  86 static const int trace_types[] =
  87 {
  88   trace_none,
  89   trace_scan,
  90   trace_parse,
  91   trace_automaton,
  92   trace_bitsets,
  93   trace_grammar,
  94   trace_resource,
  95   trace_sets,
  96   trace_tools,
  97   trace_skeleton,
  98   trace_time,
  99   trace_all
 100 };
 101
 102
 103 static void
 104 trace_argmatch (char *args)
 105 {
 106   verify (trace_constraint, ARGMATCH_CONSTRAINT (trace_args, trace_types));
 107   if (args)
 108     {
 109       args = strtok (args, ",");
 110       do
 111         {
 112           int trace = XARGMATCH ("--trace", args,
 113                                  trace_args, trace_types);
 114           if (trace == trace_none)
 115             trace_flag = trace_none;
 116           else
 117             trace_flag |= trace;
 118         }
 119       while ((args = strtok (NULL, ",")));
 120     }
 121   else
 122     trace_flag = trace_all;
 123 }
 124
 125
 126 /*----------------------.
 127 | --report's handling.  |
 128 `----------------------*/
 129
 130 static const char * const report_args[] =
 131 {
 132   /* In a series of synonyms, present the most meaningful first, so
 133      that argmatch_valid be more readable.  */
 134   "none",
 135   "state", "states",
 136   "itemset", "itemsets",
 137   "lookahead", "lookaheads",
 138   "solved",
 139   "all",
 140   0
 141 };
 142
 143 static const int report_types[] =
 144 {
 145   report_none,
 146   report_states, report_states,
 147   report_states | report_itemsets, report_states | report_itemsets,
 148   report_states | report_lookaheads, report_states | report_lookaheads,
 149   report_states | report_solved_conflicts,
 150   report_all
 151 };
 152
 153
 154 static void
 155 report_argmatch (char *args)
 156 {
 157   verify (report_constraint, ARGMATCH_CONSTRAINT (report_args, report_types));
 158   args = strtok (args, ",");
 159   do
 160     {
 161       int report = XARGMATCH ("--report", args,
 162                               report_args, report_types);
 163       if (report == report_none)
 164         report_flag = report_none;
 165       else
 166         report_flag |= report;
 167     }
 168   while ((args = strtok (NULL, ",")));
 169 }
 170
 171
 172 /*-------------------------------------------.
 173 | Display the help message and exit STATUS.  |
 174 `-------------------------------------------*/
 175
 176 static void usage (int) ATTRIBUTE_NORETURN;
 177
 178 static void
 179 usage (int status)
 180 {
 181   if (status != 0)
 182     fprintf (stderr, _("Try `%s --help' for more information.\n"),
 183              program_name);
 184   else
 185     {
 186       /* Some efforts were made to ease the translators' task, please
 187          continue.  */
 188       fputs (_("\
 189 GNU bison generates parsers for LALR(1) grammars.\n"), stdout);
 190       putc ('\n', stdout);
 191
 192       fprintf (stdout, _("\
 193 Usage: %s [OPTION]... FILE\n"), program_name);
 194       putc ('\n', stdout);
 195
 196       fputs (_("\
 197 If a long option shows an argument as mandatory, then it is mandatory\n\
 198 for the equivalent short option also.  Similarly for optional arguments.\n"),
 199              stdout);
 200       putc ('\n', stdout);
 201
 202       fputs (_("\
 203 Operation modes:\n\
 204   -h, --help      display this help and exit\n\
 205   -V, --version   output version information and exit\n\
 206   -y, --yacc      emulate POSIX yacc\n"), stdout);
 207       putc ('\n', stdout);
 208
 209       fputs (_("\
 210 Parser:\n\
 211   -S, --skeleton=FILE        specify the skeleton to use\n\
 212   -t, --debug                instrument the parser for debugging\n\
 213       --locations            enable locations computation\n\
 214   -p, --name-prefix=PREFIX   prepend PREFIX to the external symbols\n\
 215   -l, --no-lines             don't generate `#line' directives\n\
 216   -n, --no-parser            generate the tables only\n\
 217   -k, --token-table          include a table of token names\n\
 218 "), stdout);
 219       putc ('\n', stdout);
 220
 221       fputs (_("\
 222 Output:\n\
 223   -d, --defines              also produce a header file\n\
 224   -r, --report=THINGS        also produce details on the automaton\n\
 225   -v, --verbose              same as `--report=state'\n\
 226   -b, --file-prefix=PREFIX   specify a PREFIX for output files\n\
 227   -o, --output=FILE          leave output to FILE\n\
 228   -g, --graph                also produce a VCG description of the automaton\n\
 229 "), stdout);
 230       putc ('\n', stdout);
 231
 232       fputs (_("\
 233 THINGS is a list of comma separated words that can include:\n\
 234   `state'        describe the states\n\
 235   `itemset'      complete the core item sets with their closure\n\
 236   `lookahead'    explicitly associate lookaheads to items\n\
 237   `solved'       describe shift/reduce conflicts solving\n\
 238   `all'          include all the above information\n\
 239   `none'         disable the report\n\
 240 "), stdout);
 241       putc ('\n', stdout);
 242
 243       fputs (_("\
 244 Report bugs to <bug-bison@gnu.org>.\n"), stdout);
 245     }
 246
 247   exit (status);
 248 }
 249
 250
 251 /*------------------------------.
 252 | Display the version message.  |
 253 `------------------------------*/
 254
 255 static void
 256 version (void)
 257 {
 258   /* Some efforts were made to ease the translators' task, please
 259      continue.  */
 260   printf (_("bison (GNU Bison) %s"), VERSION);
 261   putc ('\n', stdout);
 262   fputs (_("Written by Robert Corbett and Richard Stallman.\n"), stdout);
 263   putc ('\n', stdout);
 264
 265   fprintf (stdout,
 266            _("Copyright (C) %d Free Software Foundation, Inc.\n"), 2002);
 267
 268   fputs (_("\
 269 This is free software; see the source for copying conditions.  There is NO\n\
 270 warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\
 271 "),
 272          stdout);
 273 }
 274
 275
 276 /*----------------------.
 277 | Process the options.  |
 278 `----------------------*/
 279
 280 /* Shorts options.  */
 281 const char *short_options = "yvegdhr:ltknVo:b:p:S:T::";
 282
 283 static struct option const long_options[] =
 284 {
 285   /* Operation modes. */
 286   { "help",          no_argument,               0,   'h' },
 287   { "version",       no_argument,               0,   'V' },
 288
 289   /* Parser. */
 290   { "name-prefix",   required_argument,   0,   'p' },
 291   { "include",       required_argument,   0,   'I' },
 292
 293   /* Output. */
 294   { "file-prefix", required_argument,   0,   'b' },
 295   { "output",      required_argument,   0,   'o' },
 296   { "output-file", required_argument,   0,   'o' },
 297   { "graph",       optional_argument,   0,   'g' },
 298   { "report",      required_argument,   0,   'r' },
 299   { "verbose",     no_argument,         0,   'v' },
 300
 301   /* Hidden. */
 302   { "trace",         optional_argument,   0,     'T' },
 303
 304   /* Output.  */
 305   { "defines",     optional_argument,   0,   'd' },
 306
 307   /* Operation modes.  */
 308   { "fixed-output-files", no_argument,  0,   'y' },
 309   { "yacc",               no_argument,  0,   'y' },
 310
 311   /* Parser.  */
 312   { "debug",          no_argument,               0,   't' },
 313   { "locations",      no_argument, &locations_flag,     1 },
 314   { "no-lines",       no_argument,               0,   'l' },
 315   { "no-parser",      no_argument,               0,   'n' },
 316   { "raw",            no_argument,               0,     0 },
 317   { "skeleton",       required_argument,         0,   'S' },
 318   { "token-table",    no_argument,               0,   'k' },
 319
 320   {0, 0, 0, 0}
 321 };
 322
 323 /* Under DOS, there is no difference on the case.  This can be
 324    troublesome when looking for `.tab' etc.  */
 325 #ifdef MSDOS
 326 # define AS_FILE_NAME(File) (strlwr (File), (File))
 327 #else
 328 # define AS_FILE_NAME(File) (File)
 329 #endif
 330
 331 void
 332 getargs (int argc, char *argv[])
 333 {
 334   int c;
 335
 336   while ((c = getopt_long (argc, argv, short_options, long_options, NULL))
 337          != -1)
 338     switch (c)
 339       {
 340       case 0:
 341         /* Certain long options cause getopt_long to return 0.  */
 342         break;
 343
 344       case 'y':
 345         yacc_flag = 1;
 346         break;
 347
 348       case 'h':
 349         usage (EXIT_SUCCESS);
 350
 351       case 'V':
 352         version ();
 353         exit (EXIT_SUCCESS);
 354
 355       case 'g':
 356         /* Here, the -g and --graph=FILE options are differentiated.  */
 357         graph_flag = 1;
 358         if (optarg)
 359           spec_graph_file = AS_FILE_NAME (optarg);
 360         break;
 361
 362       case 'v':
 363         report_flag |= report_states;
 364         break;
 365
 366       case 'S':
 367         skeleton = AS_FILE_NAME (optarg);
 368         break;
 369
 370       case 'I':
 371         include = AS_FILE_NAME (optarg);
 372         break;
 373
 374       case 'd':
 375         /* Here, the -d and --defines options are differentiated.  */
 376         defines_flag = 1;
 377         if (optarg)
 378           spec_defines_file = AS_FILE_NAME (optarg);
 379         break;
 380
 381       case 'l':
 382         no_lines_flag = 1;
 383         break;
 384
 385       case 'k':
 386         token_table_flag = 1;
 387         break;
 388
 389       case 'n':
 390         no_parser_flag = 1;
 391         break;
 392
 393       case 't':
 394         debug_flag = 1;
 395         break;
 396
 397       case 'o':
 398         spec_outfile = AS_FILE_NAME (optarg);
 399         break;
 400
 401       case 'b':
 402         spec_file_prefix = AS_FILE_NAME (optarg);
 403         break;
 404
 405       case 'p':
 406         spec_name_prefix = optarg;
 407         break;
 408
 409       case 'r':
 410         report_argmatch (optarg);
 411         break;
 412
 413       case 'T':
 414         trace_argmatch (optarg);
 415         break;
 416
 417       default:
 418         usage (EXIT_FAILURE);
 419       }
 420
 421   if (argc - optind != 1)
 422     {
 423       if (argc - optind < 1)
 424         error (0, 0, _("missing operand after `%s'"), argv[argc - 1]);
 425       else
 426         error (0, 0, _("extra operand `%s'"), argv[optind + 1]);
 427       usage (EXIT_FAILURE);
 428     }
 429
 430   current_file = grammar_file = uniqstr_new (argv[optind]);
 431 }