usr.bin/lex/main.c

   1 /* flex - tool to generate fast lexical analyzers */
   2
   3 /*-
   4  * Copyright (c) 1990 The Regents of the University of California.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to Berkeley by
   8  * Vern Paxson.
   9  *
  10  * The United States Government has rights in this work pursuant
  11  * to contract no. DE-AC03-76SF00098 between the United States
  12  * Department of Energy and the University of California.
  13  *
  14  * Redistribution and use in source and binary forms are permitted provided
  15  * that: (1) source distributions retain this entire copyright notice and
  16  * comment, and (2) distributions including binaries display the following
  17  * acknowledgement:  ``This product includes software developed by the
  18  * University of California, Berkeley and its contributors'' in the
  19  * documentation or other materials provided with the distribution and in
  20  * all advertising materials mentioning features or use of this software.
  21  * Neither the name of the University nor the names of its contributors may
  22  * be used to endorse or promote products derived from this software without
  23  * specific prior written permission.
  24  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
  25  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
  26  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  27  */
  28
  29 #ifndef lint
  30 char copyright[] =
  31 "@(#) Copyright (c) 1990 The Regents of the University of California.\n\
  32  All rights reserved.\n";
  33 #endif /* not lint */
  34
  35 /* $Header: /home/daffy/u0/vern/flex/RCS/main.c,v 2.64 96/05/25 20:42:42 vern Exp $ */
  36 #include <sys/cdefs.h>
  37 __FBSDID("$FreeBSD$");
  38
  39
  40 #include "flexdef.h"
  41 #include "version.h"
  42
  43 static char flex_version[] = FLEX_VERSION;
  44
  45
  46 /* declare functions that have forward references */
  47
  48 void flexinit PROTO((int, char**));
  49 void readin PROTO((void));
  50 void set_up_initial_allocations PROTO((void));
  51
  52 #ifdef NEED_ARGV_FIXUP
  53 extern void argv_fixup PROTO((int *, char ***));
  54 #endif
  55
  56
  57 /* these globals are all defined and commented in flexdef.h */
  58 int printstats, syntaxerror, eofseen, ddebug, trace, nowarn, spprdflt;
  59 int interactive, caseins, lex_compat, do_yylineno, useecs, fulltbl, usemecs;
  60 int fullspd, gen_line_dirs, performance_report, backing_up_report;
  61 int C_plus_plus, long_align, use_read, yytext_is_array, do_yywrap, csize;
  62 int yymore_used, reject, real_reject, continued_action, in_rule;
  63 int yymore_really_used, reject_really_used;
  64 int datapos, dataline, linenum, out_linenum;
  65 FILE *skelfile = NULL;
  66 int skel_ind = 0;
  67 char *action_array;
  68 int action_size, defs1_offset, prolog_offset, action_offset, action_index;
  69 char *infilename = NULL, *outfilename = NULL;
  70 int did_outfilename;
  71 char *prefix, *yyclass;
  72 int do_stdinit, use_stdout;
  73 int onestate[ONE_STACK_SIZE], onesym[ONE_STACK_SIZE];
  74 int onenext[ONE_STACK_SIZE], onedef[ONE_STACK_SIZE], onesp;
  75 int current_mns, current_max_rules;
  76 int num_rules, num_eof_rules, default_rule, lastnfa;
  77 int *firstst, *lastst, *finalst, *transchar, *trans1, *trans2;
  78 int *accptnum, *assoc_rule, *state_type;
  79 int *rule_type, *rule_linenum, *rule_useful;
  80 int current_state_type;
  81 int variable_trailing_context_rules;
  82 int numtemps, numprots, protprev[MSP], protnext[MSP], prottbl[MSP];
  83 int protcomst[MSP], firstprot, lastprot, protsave[PROT_SAVE_SIZE];
  84 int numecs, nextecm[CSIZE + 1], ecgroup[CSIZE + 1], nummecs, tecfwd[CSIZE + 1];
  85 int tecbck[CSIZE + 1];
  86 int lastsc, *scset, *scbol, *scxclu, *sceof;
  87 int current_max_scs;
  88 char **scname;
  89 int current_max_dfa_size, current_max_xpairs;
  90 int current_max_template_xpairs, current_max_dfas;
  91 int lastdfa, *nxt, *chk, *tnxt;
  92 int *base, *def, *nultrans, NUL_ec, tblend, firstfree, **dss, *dfasiz;
  93 union dfaacc_union *dfaacc;
  94 int *accsiz, *dhash, numas;
  95 int numsnpairs, jambase, jamstate;
  96 int lastccl, *cclmap, *ccllen, *cclng, cclreuse;
  97 int current_maxccls, current_max_ccl_tbl_size;
  98 Char *ccltbl;
  99 char nmstr[MAXLINE];
 100 int sectnum, nummt, hshcol, dfaeql, numeps, eps2, num_reallocs;
 101 int tmpuses, totnst, peakpairs, numuniq, numdup, hshsave;
 102 int num_backing_up, bol_needed;
 103 FILE *backing_up_file;
 104 int end_of_buffer_state;
 105 char **input_files;
 106 int num_input_files;
 107
 108 /* Make sure program_name is initialized so we don't crash if writing
 109  * out an error message before getting the program name from argv[0].
 110  */
 111 char *program_name = "flex";
 112
 113 #ifndef SHORT_FILE_NAMES
 114 static char *outfile_template = "lex.%s.%s";
 115 static char *backing_name = "lex.backup";
 116 #else
 117 static char *outfile_template = "lex%s.%s";
 118 static char *backing_name = "lex.bck";
 119 #endif
 120
 121 #ifdef THINK_C
 122 #include <console.h>
 123 #endif
 124
 125 #ifdef MS_DOS
 126 extern unsigned _stklen = 16384;
 127 #endif
 128
 129 static char outfile_path[MAXLINE];
 130 static int outfile_created = 0;
 131 static char *skelname = NULL;
 132
 133
 134 int main( argc, argv )
 135 int argc;
 136 char **argv;
 137         {
 138         int i;
 139
 140 #ifdef THINK_C
 141         argc = ccommand( &argv );
 142 #endif
 143 #ifdef NEED_ARGV_FIXUP
 144         argv_fixup( &argc, &argv );
 145 #endif
 146
 147         flexinit( argc, argv );
 148
 149         readin();
 150
 151         ntod();
 152
 153         for ( i = 1; i <= num_rules; ++i )
 154                 if ( ! rule_useful[i] && i != default_rule )
 155                         line_warning( _( "rule cannot be matched" ),
 156                                         rule_linenum[i] );
 157
 158         if ( spprdflt && ! reject && rule_useful[default_rule] )
 159                 line_warning(
 160                         _( "-s option given but default rule can be matched" ),
 161                         rule_linenum[default_rule] );
 162
 163         /* Generate the C state transition tables from the DFA. */
 164         make_tables();
 165
 166         /* Note, flexend does not return.  It exits with its argument
 167          * as status.
 168          */
 169         flexend( 0 );
 170
 171         return 0;       /* keep compilers/lint happy */
 172         }
 173
 174
 175 /* check_options - check user-specified options */
 176
 177 void check_options()
 178         {
 179         int i;
 180
 181         if ( lex_compat )
 182                 {
 183                 if ( C_plus_plus )
 184                         flexerror( _( "Can't use -+ with -l option" ) );
 185
 186                 if ( fulltbl || fullspd )
 187                         flexerror( _( "Can't use -f or -F with -l option" ) );
 188
 189                 /* Don't rely on detecting use of yymore() and REJECT,
 190                  * just assume they'll be used.
 191                  */
 192                 yymore_really_used = reject_really_used = true;
 193
 194                 yytext_is_array = true;
 195                 do_yylineno = true;
 196                 use_read = false;
 197                 }
 198
 199         if ( do_yylineno )
 200                 /* This should really be "maintain_backup_tables = true" */
 201                 reject_really_used = true;
 202
 203         if ( csize == unspecified )
 204                 {
 205                 if ( (fulltbl || fullspd) && ! useecs )
 206                         csize = DEFAULT_CSIZE;
 207                 else
 208                         csize = CSIZE;
 209                 }
 210
 211         if ( interactive == unspecified )
 212                 {
 213                 if ( fulltbl || fullspd )
 214                         interactive = false;
 215                 else
 216                         interactive = true;
 217                 }
 218
 219         if ( fulltbl || fullspd )
 220                 {
 221                 if ( usemecs )
 222                         flexerror(
 223                         _( "-Cf/-CF and -Cm don't make sense together" ) );
 224
 225                 if ( interactive )
 226                         flexerror( _( "-Cf/-CF and -I are incompatible" ) );
 227
 228                 if ( lex_compat )
 229                         flexerror(
 230                 _( "-Cf/-CF are incompatible with lex-compatibility mode" ) );
 231
 232                 if ( do_yylineno )
 233                         flexerror(
 234                         _( "-Cf/-CF and %option yylineno are incompatible" ) );
 235
 236                 if ( fulltbl && fullspd )
 237                         flexerror( _( "-Cf and -CF are mutually exclusive" ) );
 238                 }
 239
 240         if ( C_plus_plus && fullspd )
 241                 flexerror( _( "Can't use -+ with -CF option" ) );
 242
 243         if ( C_plus_plus && yytext_is_array )
 244                 {
 245                 warn( _( "%array incompatible with -+ option" ) );
 246                 yytext_is_array = false;
 247                 }
 248
 249         if ( useecs )
 250                 { /* Set up doubly-linked equivalence classes. */
 251
 252                 /* We loop all the way up to csize, since ecgroup[csize] is
 253                  * the position used for NUL characters.
 254                  */
 255                 ecgroup[1] = NIL;
 256
 257                 for ( i = 2; i <= csize; ++i )
 258                         {
 259                         ecgroup[i] = i - 1;
 260                         nextecm[i - 1] = i;
 261                         }
 262
 263                 nextecm[csize] = NIL;
 264                 }
 265
 266         else
 267                 {
 268                 /* Put everything in its own equivalence class. */
 269                 for ( i = 1; i <= csize; ++i )
 270                         {
 271                         ecgroup[i] = i;
 272                         nextecm[i] = BAD_SUBSCRIPT;     /* to catch errors */
 273                         }
 274                 }
 275
 276         if ( ! use_stdout )
 277                 {
 278                 FILE *prev_stdout;
 279
 280                 if ( ! did_outfilename )
 281                         {
 282                         char *suffix;
 283
 284                         if ( C_plus_plus )
 285                                 suffix = "cc";
 286                         else
 287                                 suffix = "c";
 288
 289                         sprintf( outfile_path, outfile_template,
 290                                 prefix, suffix );
 291
 292                         outfilename = outfile_path;
 293                         }
 294
 295                 prev_stdout = freopen( outfilename, "w", stdout );
 296
 297                 if ( prev_stdout == NULL )
 298                         lerrsf( _( "could not create %s" ), outfilename );
 299
 300                 outfile_created = 1;
 301                 }
 302
 303         if ( skelname && (skelfile = fopen( skelname, "r" )) == NULL )
 304                 lerrsf( _( "can't open skeleton file %s" ), skelname );
 305
 306         if ( strcmp( prefix, "yy" ) )
 307                 {
 308 #define GEN_PREFIX(name) out_str3( "#define yy%s %s%s\n", name, prefix, name )
 309                 if ( C_plus_plus )
 310                         GEN_PREFIX( "FlexLexer" );
 311                 else
 312                         {
 313                         GEN_PREFIX( "_create_buffer" );
 314                         GEN_PREFIX( "_delete_buffer" );
 315                         GEN_PREFIX( "_scan_buffer" );
 316                         GEN_PREFIX( "_scan_string" );
 317                         GEN_PREFIX( "_scan_bytes" );
 318                         GEN_PREFIX( "_flex_debug" );
 319                         GEN_PREFIX( "_init_buffer" );
 320                         GEN_PREFIX( "_flush_buffer" );
 321                         GEN_PREFIX( "_load_buffer_state" );
 322                         GEN_PREFIX( "_switch_to_buffer" );
 323                         GEN_PREFIX( "in" );
 324                         GEN_PREFIX( "leng" );
 325                         GEN_PREFIX( "lex" );
 326                         GEN_PREFIX( "out" );
 327                         GEN_PREFIX( "restart" );
 328                         GEN_PREFIX( "text" );
 329
 330                         if ( do_yylineno )
 331                                 GEN_PREFIX( "lineno" );
 332                         }
 333
 334                 if ( do_yywrap )
 335                         GEN_PREFIX( "wrap" );
 336
 337                 outn( "" );
 338                 }
 339
 340         if ( did_outfilename )
 341                 line_directive_out( stdout, 0 );
 342
 343         skelout();
 344         }
 345
 346
 347 /* flexend - terminate flex
 348  *
 349  * note
 350  *    This routine does not return.
 351  */
 352
 353 void flexend( exit_status )
 354 int exit_status;
 355
 356         {
 357         int tblsiz;
 358         int unlink();
 359
 360         if ( skelfile != NULL )
 361                 {
 362                 if ( ferror( skelfile ) )
 363                         lerrsf( _( "input error reading skeleton file %s" ),
 364                                 skelname );
 365
 366                 else if ( fclose( skelfile ) )
 367                         lerrsf( _( "error closing skeleton file %s" ),
 368                                 skelname );
 369                 }
 370
 371         if ( exit_status != 0 && outfile_created )
 372                 {
 373                 if ( ferror( stdout ) )
 374                         lerrsf( _( "error writing output file %s" ),
 375                                 outfilename );
 376
 377                 else if ( fclose( stdout ) )
 378                         lerrsf( _( "error closing output file %s" ),
 379                                 outfilename );
 380
 381                 else if ( unlink( outfilename ) )
 382                         lerrsf( _( "error deleting output file %s" ),
 383                                 outfilename );
 384                 }
 385
 386         if ( backing_up_report && backing_up_file )
 387                 {
 388                 if ( num_backing_up == 0 )
 389                         fprintf( backing_up_file, _( "No backing up.\n" ) );
 390                 else if ( fullspd || fulltbl )
 391                         fprintf( backing_up_file,
 392                                 _( "%d backing up (non-accepting) states.\n" ),
 393                                 num_backing_up );
 394                 else
 395                         fprintf( backing_up_file,
 396                                 _( "Compressed tables always back up.\n" ) );
 397
 398                 if ( ferror( backing_up_file ) )
 399                         lerrsf( _( "error writing backup file %s" ),
 400                                 backing_name );
 401
 402                 else if ( fclose( backing_up_file ) )
 403                         lerrsf( _( "error closing backup file %s" ),
 404                                 backing_name );
 405                 }
 406
 407         if ( printstats )
 408                 {
 409                 fprintf( stderr, _( "%s version %s usage statistics:\n" ),
 410                         program_name, flex_version );
 411
 412                 fprintf( stderr, _( "  scanner options: -" ) );
 413
 414                 if ( C_plus_plus )
 415                         putc( '+', stderr );
 416                 if ( backing_up_report )
 417                         putc( 'b', stderr );
 418                 if ( ddebug )
 419                         putc( 'd', stderr );
 420                 if ( caseins )
 421                         putc( 'i', stderr );
 422                 if ( lex_compat )
 423                         putc( 'l', stderr );
 424                 if ( performance_report > 0 )
 425                         putc( 'p', stderr );
 426                 if ( performance_report > 1 )
 427                         putc( 'p', stderr );
 428                 if ( spprdflt )
 429                         putc( 's', stderr );
 430                 if ( use_stdout )
 431                         putc( 't', stderr );
 432                 if ( printstats )
 433                         putc( 'v', stderr );    /* always true! */
 434                 if ( nowarn )
 435                         putc( 'w', stderr );
 436                 if ( interactive == false )
 437                         putc( 'B', stderr );
 438                 if ( interactive == true )
 439                         putc( 'I', stderr );
 440                 if ( ! gen_line_dirs )
 441                         putc( 'L', stderr );
 442                 if ( trace )
 443                         putc( 'T', stderr );
 444
 445                 if ( csize == unspecified )
 446                         /* We encountered an error fairly early on, so csize
 447                          * never got specified.  Define it now, to prevent
 448                          * bogus table sizes being written out below.
 449                          */
 450                         csize = 256;
 451
 452                 if ( csize == 128 )
 453                         putc( '7', stderr );
 454                 else
 455                         putc( '8', stderr );
 456
 457                 fprintf( stderr, " -C" );
 458
 459                 if ( long_align )
 460                         putc( 'a', stderr );
 461                 if ( fulltbl )
 462                         putc( 'f', stderr );
 463                 if ( fullspd )
 464                         putc( 'F', stderr );
 465                 if ( useecs )
 466                         putc( 'e', stderr );
 467                 if ( usemecs )
 468                         putc( 'm', stderr );
 469                 if ( use_read )
 470                         putc( 'r', stderr );
 471
 472                 if ( did_outfilename )
 473                         fprintf( stderr, " -o%s", outfilename );
 474
 475                 if ( skelname )
 476                         fprintf( stderr, " -S%s", skelname );
 477
 478                 if ( strcmp( prefix, "yy" ) )
 479                         fprintf( stderr, " -P%s", prefix );
 480
 481                 putc( '\n', stderr );
 482
 483                 fprintf( stderr, _( "  %d/%d NFA states\n" ),
 484                         lastnfa, current_mns );
 485                 fprintf( stderr, _( "  %d/%d DFA states (%d words)\n" ),
 486                         lastdfa, current_max_dfas, totnst );
 487                 fprintf( stderr, _( "  %d rules\n" ),
 488                 num_rules + num_eof_rules - 1 /* - 1 for def. rule */ );
 489
 490                 if ( num_backing_up == 0 )
 491                         fprintf( stderr, _( "  No backing up\n" ) );
 492                 else if ( fullspd || fulltbl )
 493                         fprintf( stderr,
 494                         _( "  %d backing-up (non-accepting) states\n" ),
 495                                 num_backing_up );
 496                 else
 497                         fprintf( stderr,
 498                                 _( "  Compressed tables always back-up\n" ) );
 499
 500                 if ( bol_needed )
 501                         fprintf( stderr,
 502                                 _( "  Beginning-of-line patterns used\n" ) );
 503
 504                 fprintf( stderr, _( "  %d/%d start conditions\n" ), lastsc,
 505                         current_max_scs );
 506                 fprintf( stderr,
 507                         _( "  %d epsilon states, %d double epsilon states\n" ),
 508                         numeps, eps2 );
 509
 510                 if ( lastccl == 0 )
 511                         fprintf( stderr, _( "  no character classes\n" ) );
 512                 else
 513                         fprintf( stderr,
 514 _( "  %d/%d character classes needed %d/%d words of storage, %d reused\n" ),
 515                                 lastccl, current_maxccls,
 516                                 cclmap[lastccl] + ccllen[lastccl],
 517                                 current_max_ccl_tbl_size, cclreuse );
 518
 519                 fprintf( stderr, _( "  %d state/nextstate pairs created\n" ),
 520                         numsnpairs );
 521                 fprintf( stderr, _( "  %d/%d unique/duplicate transitions\n" ),
 522                         numuniq, numdup );
 523
 524                 if ( fulltbl )
 525                         {
 526                         tblsiz = lastdfa * numecs;
 527                         fprintf( stderr, _( "  %d table entries\n" ), tblsiz );
 528                         }
 529
 530                 else
 531                         {
 532                         tblsiz = 2 * (lastdfa + numtemps) + 2 * tblend;
 533
 534                         fprintf( stderr,
 535                                 _( "  %d/%d base-def entries created\n" ),
 536                                 lastdfa + numtemps, current_max_dfas );
 537                         fprintf( stderr,
 538                         _( "  %d/%d (peak %d) nxt-chk entries created\n" ),
 539                                 tblend, current_max_xpairs, peakpairs );
 540                         fprintf( stderr,
 541                 _( "  %d/%d (peak %d) template nxt-chk entries created\n" ),
 542                                 numtemps * nummecs,
 543                                 current_max_template_xpairs,
 544                                 numtemps * numecs );
 545                         fprintf( stderr, _( "  %d empty table entries\n" ),
 546                                 nummt );
 547                         fprintf( stderr, _( "  %d protos created\n" ),
 548                                 numprots );
 549                         fprintf( stderr,
 550                                 _( "  %d templates created, %d uses\n" ),
 551                                 numtemps, tmpuses );
 552                         }
 553
 554                 if ( useecs )
 555                         {
 556                         tblsiz = tblsiz + csize;
 557                         fprintf( stderr,
 558                                 _( "  %d/%d equivalence classes created\n" ),
 559                                 numecs, csize );
 560                         }
 561
 562                 if ( usemecs )
 563                         {
 564                         tblsiz = tblsiz + numecs;
 565                         fprintf( stderr,
 566                         _( "  %d/%d meta-equivalence classes created\n" ),
 567                                 nummecs, csize );
 568                         }
 569
 570                 fprintf( stderr,
 571                 _( "  %d (%d saved) hash collisions, %d DFAs equal\n" ),
 572                         hshcol, hshsave, dfaeql );
 573                 fprintf( stderr, _( "  %d sets of reallocations needed\n" ),
 574                         num_reallocs );
 575                 fprintf( stderr, _( "  %d total table entries needed\n" ),
 576                         tblsiz );
 577                 }
 578
 579         exit( exit_status );
 580         }
 581
 582
 583 /* flexinit - initialize flex */
 584
 585 void flexinit( argc, argv )
 586 int argc;
 587 char **argv;
 588         {
 589         int i, sawcmpflag;
 590         char *arg;
 591
 592         printstats = syntaxerror = trace = spprdflt = caseins = false;
 593         lex_compat = C_plus_plus = backing_up_report = ddebug = fulltbl = false;
 594         fullspd = long_align = nowarn = yymore_used = continued_action = false;
 595         do_yylineno = yytext_is_array = in_rule = reject = do_stdinit = false;
 596         yymore_really_used = reject_really_used = unspecified;
 597         interactive = csize = unspecified;
 598         do_yywrap = gen_line_dirs = usemecs = useecs = true;
 599         performance_report = 0;
 600         did_outfilename = 0;
 601         prefix = "yy";
 602         yyclass = 0;
 603         use_read = use_stdout = false;
 604
 605         sawcmpflag = false;
 606
 607         /* Initialize dynamic array for holding the rule actions. */
 608         action_size = 2048;     /* default size of action array in bytes */
 609         action_array = allocate_character_array( action_size );
 610         defs1_offset = prolog_offset = action_offset = action_index = 0;
 611         action_array[0] = '\0';
 612
 613         program_name = argv[0];
 614
 615         if ( program_name[0] != '\0' &&
 616              program_name[strlen( program_name ) - 1] == '+' )
 617                 C_plus_plus = true;
 618
 619         /* read flags */
 620         for ( --argc, ++argv; argc ; --argc, ++argv )
 621                 {
 622                 arg = argv[0];
 623
 624                 if ( arg[0] != '-' || arg[1] == '\0' )
 625                         break;
 626
 627                 if ( arg[1] == '-' )
 628                         { /* --option */
 629                         if ( ! strcmp( arg, "--help" ) )
 630                                 arg = "-h";
 631
 632                         else if ( ! strcmp( arg, "--version" ) )
 633                                 arg = "-V";
 634
 635                         else if ( ! strcmp( arg, "--" ) )
 636                                 { /* end of options */
 637                                 --argc;
 638                                 ++argv;
 639                                 break;
 640                                 }
 641                         }
 642
 643                 for ( i = 1; arg[i] != '\0'; ++i )
 644                         switch ( arg[i] )
 645                                 {
 646                                 case '+':
 647                                         C_plus_plus = true;
 648                                         break;
 649
 650                                 case 'B':
 651                                         interactive = false;
 652                                         break;
 653
 654                                 case 'b':
 655                                         backing_up_report = true;
 656                                         break;
 657
 658                                 case 'c':
 659                                         break;
 660
 661                                 case 'C':
 662                                         if ( i != 1 )
 663                                                 flexerror(
 664                                 _( "-C flag must be given separately" ) );
 665
 666                                         if ( ! sawcmpflag )
 667                                                 {
 668                                                 useecs = false;
 669                                                 usemecs = false;
 670                                                 fulltbl = false;
 671                                                 sawcmpflag = true;
 672                                                 }
 673
 674                                         for ( ++i; arg[i] != '\0'; ++i )
 675                                                 switch ( arg[i] )
 676                                                         {
 677                                                         case 'a':
 678                                                                 long_align =
 679                                                                         true;
 680                                                                 break;
 681
 682                                                         case 'e':
 683                                                                 useecs = true;
 684                                                                 break;
 685
 686                                                         case 'F':
 687                                                                 fullspd = true;
 688                                                                 break;
 689
 690                                                         case 'f':
 691                                                                 fulltbl = true;
 692                                                                 break;
 693
 694                                                         case 'm':
 695                                                                 usemecs = true;
 696                                                                 break;
 697
 698                                                         case 'r':
 699                                                                 use_read = true;
 700                                                                 break;
 701
 702                                                         default:
 703                                                                 lerrif(
 704                                                 _( "unknown -C option '%c'" ),
 705                                                                 (int) arg[i] );
 706                                                                 break;
 707                                                         }
 708
 709                                         goto get_next_arg;
 710
 711                                 case 'd':
 712                                         ddebug = true;
 713                                         break;
 714
 715                                 case 'f':
 716                                         useecs = usemecs = false;
 717                                         use_read = fulltbl = true;
 718                                         break;
 719
 720                                 case 'F':
 721                                         useecs = usemecs = false;
 722                                         use_read = fullspd = true;
 723                                         break;
 724
 725                                 case '?':
 726                                 case 'h':
 727                                         usage();
 728                                         exit( 0 );
 729
 730                                 case 'I':
 731                                         interactive = true;
 732                                         break;
 733
 734                                 case 'i':
 735                                         caseins = true;
 736                                         break;
 737
 738                                 case 'l':
 739                                         lex_compat = true;
 740                                         break;
 741
 742                                 case 'L':
 743                                         gen_line_dirs = false;
 744                                         break;
 745
 746                                 case 'n':
 747                                         /* Stupid do-nothing deprecated
 748                                          * option.
 749                                          */
 750                                         break;
 751
 752                                 case 'o':
 753                                         if ( i != 1 )
 754                                                 flexerror(
 755                                 _( "-o flag must be given separately" ) );
 756
 757                                         outfilename = arg + i + 1;
 758                                         did_outfilename = 1;
 759                                         goto get_next_arg;
 760
 761                                 case 'P':
 762                                         if ( i != 1 )
 763                                                 flexerror(
 764                                 _( "-P flag must be given separately" ) );
 765
 766                                         prefix = arg + i + 1;
 767                                         goto get_next_arg;
 768
 769                                 case 'p':
 770                                         ++performance_report;
 771                                         break;
 772
 773                                 case 'S':
 774                                         if ( i != 1 )
 775                                                 flexerror(
 776                                 _( "-S flag must be given separately" ) );
 777
 778                                         skelname = arg + i + 1;
 779                                         goto get_next_arg;
 780
 781                                 case 's':
 782                                         spprdflt = true;
 783                                         break;
 784
 785                                 case 't':
 786                                         use_stdout = true;
 787                                         break;
 788
 789                                 case 'T':
 790                                         trace = true;
 791                                         break;
 792
 793                                 case 'v':
 794                                         printstats = true;
 795                                         break;
 796
 797                                 case 'V':
 798                                         printf( _( "%s version %s\n" ),
 799                                                 program_name, flex_version );
 800                                         exit( 0 );
 801
 802                                 case 'w':
 803                                         nowarn = true;
 804                                         break;
 805
 806                                 case '7':
 807                                         csize = 128;
 808                                         break;
 809
 810                                 case '8':
 811                                         csize = CSIZE;
 812                                         break;
 813
 814                                 default:
 815                                         fprintf( stderr,
 816                 _( "%s: unknown flag '%c'.  For usage, try\n\t%s --help\n" ),
 817                                                 program_name, (int) arg[i],
 818                                                 program_name );
 819                                         exit( 1 );
 820                                 }
 821
 822                 /* Used by -C, -S, -o, and -P flags in lieu of a "continue 2"
 823                  * control.
 824                  */
 825                 get_next_arg: ;
 826                 }
 827
 828         num_input_files = argc;
 829         input_files = argv;
 830         set_input_file( num_input_files > 0 ? input_files[0] : NULL );
 831
 832         lastccl = lastsc = lastdfa = lastnfa = 0;
 833         num_rules = num_eof_rules = default_rule = 0;
 834         numas = numsnpairs = tmpuses = 0;
 835         numecs = numeps = eps2 = num_reallocs = hshcol = dfaeql = totnst = 0;
 836         numuniq = numdup = hshsave = eofseen = datapos = dataline = 0;
 837         num_backing_up = onesp = numprots = 0;
 838         variable_trailing_context_rules = bol_needed = false;
 839
 840         out_linenum = linenum = sectnum = 1;
 841         firstprot = NIL;
 842
 843         /* Used in mkprot() so that the first proto goes in slot 1
 844          * of the proto queue.
 845          */
 846         lastprot = 1;
 847
 848         set_up_initial_allocations();
 849         }
 850
 851
 852 /* readin - read in the rules section of the input file(s) */
 853
 854 void readin()
 855         {
 856         static char yy_stdinit[] = "FILE *yyin = stdin, *yyout = stdout;";
 857         static char yy_nostdinit[] =
 858                 "FILE *yyin = (FILE *) 0, *yyout = (FILE *) 0;";
 859
 860         line_directive_out( (FILE *) 0, 1 );
 861
 862         if ( yyparse() )
 863                 {
 864                 pinpoint_message( _( "fatal parse error" ) );
 865                 flexend( 1 );
 866                 }
 867
 868         if ( syntaxerror )
 869                 flexend( 1 );
 870
 871         if ( backing_up_report )
 872                 {
 873                 backing_up_file = fopen( backing_name, "w" );
 874                 if ( backing_up_file == NULL )
 875                         lerrsf(
 876                         _( "could not create backing-up info file %s" ),
 877                                 backing_name );
 878                 }
 879
 880         else
 881                 backing_up_file = NULL;
 882
 883         if ( yymore_really_used == true )
 884                 yymore_used = true;
 885         else if ( yymore_really_used == false )
 886                 yymore_used = false;
 887
 888         if ( reject_really_used == true )
 889                 reject = true;
 890         else if ( reject_really_used == false )
 891                 reject = false;
 892
 893         if ( performance_report > 0 )
 894                 {
 895                 if ( lex_compat )
 896                         {
 897                         fprintf( stderr,
 898 _( "-l AT&T lex compatibility option entails a large performance penalty\n" ) );
 899                         fprintf( stderr,
 900 _( " and may be the actual source of other reported performance penalties\n" ) );
 901                         }
 902
 903                 else if ( do_yylineno )
 904                         {
 905                         fprintf( stderr,
 906         _( "%%option yylineno entails a large performance penalty\n" ) );
 907                         }
 908
 909                 if ( performance_report > 1 )
 910                         {
 911                         if ( interactive )
 912                                 fprintf( stderr,
 913         _( "-I (interactive) entails a minor performance penalty\n" ) );
 914
 915                         if ( yymore_used )
 916                                 fprintf( stderr,
 917                 _( "yymore() entails a minor performance penalty\n" ) );
 918                         }
 919
 920                 if ( reject )
 921                         fprintf( stderr,
 922                         _( "REJECT entails a large performance penalty\n" ) );
 923
 924                 if ( variable_trailing_context_rules )
 925                         fprintf( stderr,
 926 _( "Variable trailing context rules entail a large performance penalty\n" ) );
 927                 }
 928
 929         if ( reject )
 930                 real_reject = true;
 931
 932         if ( variable_trailing_context_rules )
 933                 reject = true;
 934
 935         if ( (fulltbl || fullspd) && reject )
 936                 {
 937                 if ( real_reject )
 938                         flexerror(
 939                                 _( "REJECT cannot be used with -f or -F" ) );
 940                 else if ( do_yylineno )
 941                         flexerror(
 942                         _( "%option yylineno cannot be used with -f or -F" ) );
 943                 else
 944                         flexerror(
 945         _( "variable trailing context rules cannot be used with -f or -F" ) );
 946                 }
 947
 948         if ( reject )
 949                 outn( "\n#define YY_USES_REJECT" );
 950
 951         if ( ! do_yywrap )
 952                 {
 953                 outn( "\n#define yywrap() 1" );
 954                 outn( "#define YY_SKIP_YYWRAP" );
 955                 }
 956
 957         if ( ddebug )
 958                 outn( "\n#define FLEX_DEBUG" );
 959
 960         if ( csize == 256 )
 961                 outn( "typedef unsigned char YY_CHAR;" );
 962         else
 963                 outn( "typedef char YY_CHAR;" );
 964
 965         if ( C_plus_plus )
 966                 {
 967                 outn( "#define yytext_ptr yytext" );
 968
 969                 if ( interactive )
 970                         outn( "#define YY_INTERACTIVE" );
 971                 }
 972
 973         else
 974                 {
 975                 if ( do_stdinit )
 976                         {
 977                         outn( "#ifdef VMS" );
 978                         outn( "#ifndef __VMS_POSIX" );
 979                         outn( yy_nostdinit );
 980                         outn( "#else" );
 981                         outn( yy_stdinit );
 982                         outn( "#endif" );
 983                         outn( "#else" );
 984                         outn( yy_stdinit );
 985                         outn( "#endif" );
 986                         }
 987
 988                 else
 989                         outn( yy_nostdinit );
 990                 }
 991
 992         if ( fullspd )
 993                 outn( "typedef yyconst struct yy_trans_info *yy_state_type;" );
 994         else if ( ! C_plus_plus )
 995                 outn( "typedef int yy_state_type;" );
 996
 997         if ( ddebug )
 998                 outn( "\n#define FLEX_DEBUG" );
 999
1000         if ( lex_compat )
1001                 outn( "#define YY_FLEX_LEX_COMPAT" );
1002
1003         if ( do_yylineno && ! C_plus_plus )
1004                 {
1005                 outn( "extern int yylineno;" );
1006                 outn( "int yylineno = 1;" );
1007                 }
1008
1009         if ( C_plus_plus )
1010                 {
1011                 outn( "\n#include <FlexLexer.h>" );
1012
1013                 if ( yyclass )
1014                         {
1015                         outn( "int yyFlexLexer::yylex()" );
1016                         outn( "\t{" );
1017                         outn(
1018 "\tLexerError( \"yyFlexLexer::yylex invoked but %option yyclass used\" );" );
1019                         outn( "\treturn 0;" );
1020                         outn( "\t}" );
1021
1022                         out_str( "\n#define YY_DECL int %s::yylex()\n",
1023                                 yyclass );
1024                         }
1025                 }
1026
1027         else
1028                 {
1029                 if ( yytext_is_array )
1030                         outn( "extern char yytext[];\n" );
1031
1032                 else
1033                         {
1034                         outn( "extern char *yytext;" );
1035                         outn( "#define yytext_ptr yytext" );
1036                         }
1037
1038                 if ( yyclass )
1039                         flexerror(
1040                 _( "%option yyclass only meaningful for C++ scanners" ) );
1041                 }
1042
1043         if ( useecs )
1044                 numecs = cre8ecs( nextecm, ecgroup, csize );
1045         else
1046                 numecs = csize;
1047
1048         /* Now map the equivalence class for NUL to its expected place. */
1049         ecgroup[0] = ecgroup[csize];
1050         NUL_ec = ABS( ecgroup[0] );
1051
1052         if ( useecs )
1053                 ccl2ecl();
1054         }
1055
1056
1057 /* set_up_initial_allocations - allocate memory for internal tables */
1058
1059 void set_up_initial_allocations()
1060         {
1061         current_mns = INITIAL_MNS;
1062         firstst = allocate_integer_array( current_mns );
1063         lastst = allocate_integer_array( current_mns );
1064         finalst = allocate_integer_array( current_mns );
1065         transchar = allocate_integer_array( current_mns );
1066         trans1 = allocate_integer_array( current_mns );
1067         trans2 = allocate_integer_array( current_mns );
1068         accptnum = allocate_integer_array( current_mns );
1069         assoc_rule = allocate_integer_array( current_mns );
1070         state_type = allocate_integer_array( current_mns );
1071
1072         current_max_rules = INITIAL_MAX_RULES;
1073         rule_type = allocate_integer_array( current_max_rules );
1074         rule_linenum = allocate_integer_array( current_max_rules );
1075         rule_useful = allocate_integer_array( current_max_rules );
1076
1077         current_max_scs = INITIAL_MAX_SCS;
1078         scset = allocate_integer_array( current_max_scs );
1079         scbol = allocate_integer_array( current_max_scs );
1080         scxclu = allocate_integer_array( current_max_scs );
1081         sceof = allocate_integer_array( current_max_scs );
1082         scname = allocate_char_ptr_array( current_max_scs );
1083
1084         current_maxccls = INITIAL_MAX_CCLS;
1085         cclmap = allocate_integer_array( current_maxccls );
1086         ccllen = allocate_integer_array( current_maxccls );
1087         cclng = allocate_integer_array( current_maxccls );
1088
1089         current_max_ccl_tbl_size = INITIAL_MAX_CCL_TBL_SIZE;
1090         ccltbl = allocate_Character_array( current_max_ccl_tbl_size );
1091
1092         current_max_dfa_size = INITIAL_MAX_DFA_SIZE;
1093
1094         current_max_xpairs = INITIAL_MAX_XPAIRS;
1095         nxt = allocate_integer_array( current_max_xpairs );
1096         chk = allocate_integer_array( current_max_xpairs );
1097
1098         current_max_template_xpairs = INITIAL_MAX_TEMPLATE_XPAIRS;
1099         tnxt = allocate_integer_array( current_max_template_xpairs );
1100
1101         current_max_dfas = INITIAL_MAX_DFAS;
1102         base = allocate_integer_array( current_max_dfas );
1103         def = allocate_integer_array( current_max_dfas );
1104         dfasiz = allocate_integer_array( current_max_dfas );
1105         accsiz = allocate_integer_array( current_max_dfas );
1106         dhash = allocate_integer_array( current_max_dfas );
1107         dss = allocate_int_ptr_array( current_max_dfas );
1108         dfaacc = allocate_dfaacc_union( current_max_dfas );
1109
1110         nultrans = (int *) 0;
1111         }
1112
1113
1114 void usage()
1115         {
1116         FILE *f = stdout;
1117
1118         fprintf( f,
1119 _( "%s [-bcdfhilnpstvwBFILTV78+? -C[aefFmr] -ooutput -Pprefix -Sskeleton]\n" ),
1120                 program_name );
1121         fprintf( f, _( "\t[--help --version] [file ...]\n" ) );
1122
1123         fprintf( f, _( "\t-b  generate backing-up information to %s\n" ),
1124                 backing_name );
1125         fprintf( f, _( "\t-c  do-nothing POSIX option\n" ) );
1126         fprintf( f, _( "\t-d  turn on debug mode in generated scanner\n" ) );
1127         fprintf( f, _( "\t-f  generate fast, large scanner\n" ) );
1128         fprintf( f, _( "\t-h  produce this help message\n" ) );
1129         fprintf( f, _( "\t-i  generate case-insensitive scanner\n" ) );
1130         fprintf( f, _( "\t-l  maximal compatibility with original lex\n" ) );
1131         fprintf( f, _( "\t-n  do-nothing POSIX option\n" ) );
1132         fprintf( f, _( "\t-p  generate performance report to stderr\n" ) );
1133         fprintf( f,
1134                 _( "\t-s  suppress default rule to ECHO unmatched text\n" ) );
1135
1136         if ( ! did_outfilename )
1137                 {
1138                 sprintf( outfile_path, outfile_template,
1139                         prefix, C_plus_plus ? "cc" : "c" );
1140                 outfilename = outfile_path;
1141                 }
1142
1143         fprintf( f,
1144                 _( "\t-t  write generated scanner on stdout instead of %s\n" ),
1145                 outfilename );
1146
1147         fprintf( f,
1148                 _( "\t-v  write summary of scanner statistics to f\n" ) );
1149         fprintf( f, _( "\t-w  do not generate warnings\n" ) );
1150         fprintf( f, _( "\t-B  generate batch scanner (opposite of -I)\n" ) );
1151         fprintf( f,
1152                 _( "\t-F  use alternative fast scanner representation\n" ) );
1153         fprintf( f,
1154                 _( "\t-I  generate interactive scanner (opposite of -B)\n" ) );
1155         fprintf( f, _( "\t-L  suppress #line directives in scanner\n" ) );
1156         fprintf( f, _( "\t-T  %s should run in trace mode\n" ), program_name );
1157         fprintf( f, _( "\t-V  report %s version\n" ), program_name );
1158         fprintf( f, _( "\t-7  generate 7-bit scanner\n" ) );
1159         fprintf( f, _( "\t-8  generate 8-bit scanner\n" ) );
1160         fprintf( f, _( "\t-+  generate C++ scanner class\n" ) );
1161         fprintf( f, _( "\t-?  produce this help message\n" ) );
1162         fprintf( f,
1163 _( "\t-C  specify degree of table compression (default is -Cem):\n" ) );
1164         fprintf( f,
1165 _( "\t\t-Ca  trade off larger tables for better memory alignment\n" ) );
1166         fprintf( f, _( "\t\t-Ce  construct equivalence classes\n" ) );
1167         fprintf( f,
1168 _( "\t\t-Cf  do not compress scanner tables; use -f representation\n" ) );
1169         fprintf( f,
1170 _( "\t\t-CF  do not compress scanner tables; use -F representation\n" ) );
1171         fprintf( f, _( "\t\t-Cm  construct meta-equivalence classes\n" ) );
1172         fprintf( f,
1173         _( "\t\t-Cr  use read() instead of stdio for scanner input\n" ) );
1174         fprintf( f, _( "\t-o  specify output filename\n" ) );
1175         fprintf( f, _( "\t-P  specify scanner prefix other than \"yy\"\n" ) );
1176         fprintf( f, _( "\t-S  specify skeleton file\n" ) );
1177         fprintf( f, _( "\t--help     produce this help message\n" ) );
1178         fprintf( f, _( "\t--version  report %s version\n" ), program_name );
1179         }