1 /* $OpenBSD: main.c,v 1.28 2021/06/23 02:53:44 deraadt Exp $ */ 2 3 /* flex - tool to generate fast lexical analyzers */ 4 5 /* Copyright (c) 1990 The Regents of the University of California. */ 6 /* All rights reserved. */ 7 8 /* This code is derived from software contributed to Berkeley by */ 9 /* Vern Paxson. */ 10 11 /* The United States Government has rights in this work pursuant */ 12 /* to contract no. DE-AC03-76SF00098 between the United States */ 13 /* Department of Energy and the University of California. */ 14 15 /* This file is part of flex. */ 16 17 /* Redistribution and use in source and binary forms, with or without */ 18 /* modification, are permitted provided that the following conditions */ 19 /* are met: */ 20 21 /* 1. Redistributions of source code must retain the above copyright */ 22 /* notice, this list of conditions and the following disclaimer. */ 23 /* 2. Redistributions in binary form must reproduce the above copyright */ 24 /* notice, this list of conditions and the following disclaimer in the */ 25 /* documentation and/or other materials provided with the distribution. */ 26 27 /* Neither the name of the University nor the names of its contributors */ 28 /* may be used to endorse or promote products derived from this software */ 29 /* without specific prior written permission. */ 30 31 /* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR */ 32 /* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED */ 33 /* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR */ 34 /* PURPOSE. */ 35 36 37 38 #include "flexdef.h" 39 #include "version.h" 40 #include "options.h" 41 #include "tables.h" 42 43 static char flex_version[] = FLEX_VERSION; 44 45 /* declare functions that have forward references */ 46 47 void flexinit PROTO((int, char **)); 48 void readin PROTO((void)); 49 void set_up_initial_allocations PROTO((void)); 50 static char *basename2 PROTO((char *path, int should_strip_ext)); 51 52 53 /* these globals are all defined and commented in flexdef.h */ 54 int printstats, syntaxerror, eofseen, ddebug, trace, nowarn, spprdflt; 55 int interactive, lex_compat, posix_compat, do_yylineno, useecs, fulltbl, 56 usemecs; 57 int fullspd, gen_line_dirs, performance_report, backing_up_report; 58 int C_plus_plus, long_align, use_read, yytext_is_array, do_yywrap, csize; 59 int reentrant, bison_bridge_lval, bison_bridge_lloc; 60 int yymore_used, reject, real_reject, continued_action, in_rule; 61 int yymore_really_used, reject_really_used; 62 int datapos, dataline, linenum; 63 FILE *skelfile = NULL; 64 int skel_ind = 0; 65 char *action_array; 66 int action_size, defs1_offset, prolog_offset, action_offset, action_index; 67 char *infilename = NULL, *outfilename = NULL, *headerfilename = NULL; 68 int did_outfilename; 69 char *prefix, *yyclass, *extra_type = NULL; 70 int do_stdinit, use_stdout; 71 int onestate[ONE_STACK_SIZE], onesym[ONE_STACK_SIZE]; 72 int onenext[ONE_STACK_SIZE], onedef[ONE_STACK_SIZE], onesp; 73 int maximum_mns, current_mns, current_max_rules; 74 int num_rules, num_eof_rules, default_rule, lastnfa; 75 int *firstst, *lastst, *finalst, *transchar, *trans1, *trans2; 76 int *accptnum, *assoc_rule, *state_type; 77 int *rule_type, *rule_linenum, *rule_useful; 78 int current_state_type; 79 int variable_trailing_context_rules; 80 int numtemps, numprots, protprev[MSP], protnext[MSP], prottbl[MSP]; 81 int protcomst[MSP], firstprot, lastprot, protsave[PROT_SAVE_SIZE]; 82 int numecs, nextecm[CSIZE + 1], ecgroup[CSIZE + 1], nummecs, tecfwd[CSIZE + 1]; 83 int tecbck[CSIZE + 1]; 84 int lastsc, *scset, *scbol, *scxclu, *sceof; 85 int current_max_scs; 86 char **scname; 87 int current_max_dfa_size, current_max_xpairs; 88 int current_max_template_xpairs, current_max_dfas; 89 int lastdfa, *nxt, *chk, *tnxt; 90 int *base, *def, *nultrans, NUL_ec, tblend, firstfree, **dss, *dfasiz; 91 union dfaacc_union *dfaacc; 92 int *accsiz, *dhash, numas; 93 int numsnpairs, jambase, jamstate; 94 int lastccl, *cclmap, *ccllen, *cclng, cclreuse; 95 int current_maxccls, current_max_ccl_tbl_size; 96 u_char *ccltbl; 97 char nmstr[MAXLINE]; 98 int sectnum, nummt, hshcol, dfaeql, numeps, eps2, num_reallocs; 99 int tmpuses, totnst, peakpairs, numuniq, numdup, hshsave; 100 int num_backing_up, bol_needed; 101 FILE *backing_up_file; 102 int end_of_buffer_state; 103 char **input_files; 104 int num_input_files; 105 jmp_buf flex_main_jmp_buf; 106 bool *rule_has_nl, *ccl_has_nl; 107 int nlch = '\n'; 108 bool ansi_func_defs, ansi_func_protos; 109 110 bool tablesext, tablesverify, gentables; 111 char *tablesfilename = 0, *tablesname = 0; 112 struct yytbl_writer tableswr; 113 114 /* Make sure program_name is initialized so we don't crash if writing 115 * out an error message before getting the program name from argv[0]. 116 */ 117 char *program_name = "flex"; 118 119 static const char *outfile_template = "lex.%s.%s"; 120 static const char *backing_name = "lex.backup"; 121 static const char *tablesfile_template = "lex.%s.tables"; 122 123 /* From scan.l */ 124 extern FILE *yyout; 125 126 static char outfile_path[MAXLINE]; 127 static int outfile_created = 0; 128 static char *skelname = NULL; 129 static int _stdout_closed = 0; /* flag to prevent double-fclose() on stdout. */ 130 const char *escaped_qstart = "[[]]M4_YY_NOOP[M4_YY_NOOP[M4_YY_NOOP[[]]"; 131 const char *escaped_qend = "[[]]M4_YY_NOOP]M4_YY_NOOP]M4_YY_NOOP[[]]"; 132 133 /* For debugging. The max number of filters to apply to skeleton. */ 134 static int preproc_level = 1000; 135 136 int flex_main PROTO((int argc, char *argv[])); 137 int main PROTO((int argc, char *argv[])); 138 139 int 140 flex_main(argc, argv) 141 int argc; 142 char *argv[]; 143 { 144 int i, exit_status, child_status; 145 146 /* 147 * Set a longjmp target. Yes, I know it's a hack, but it gets worse: 148 * The return value of setjmp, if non-zero, is the desired exit code 149 * PLUS ONE. For example, if you want 'main' to return with code '2', 150 * then call longjmp() with an argument of 3. This is because it is 151 * invalid to specify a value of 0 to longjmp. FLEX_EXIT(n) should be 152 * used instead of exit(n); 153 */ 154 exit_status = setjmp(flex_main_jmp_buf); 155 if (exit_status) { 156 if (stdout && !_stdout_closed && !ferror(stdout)) { 157 fflush(stdout); 158 fclose(stdout); 159 } 160 while (wait(&child_status) > 0) { 161 if (!WIFEXITED(child_status) 162 || WEXITSTATUS(child_status) != 0) { 163 /* 164 * report an error of a child 165 */ 166 if (exit_status <= 1) 167 exit_status = 2; 168 169 } 170 } 171 return exit_status - 1; 172 } 173 flexinit(argc, argv); 174 175 readin(); 176 177 skelout(); 178 /* %% [1.5] DFA */ 179 ntod(); 180 181 for (i = 1; i <= num_rules; ++i) 182 if (!rule_useful[i] && i != default_rule) 183 line_warning(_("rule cannot be matched"), 184 rule_linenum[i]); 185 186 if (spprdflt && !reject && rule_useful[default_rule]) 187 line_warning(_ 188 ("-s option given but default rule can be matched"), 189 rule_linenum[default_rule]); 190 191 /* Generate the C state transition tables from the DFA. */ 192 make_tables(); 193 194 /* 195 * Note, flexend does not return. It exits with its argument as 196 * status. 197 */ 198 flexend(0); 199 200 return 0; /* keep compilers/lint happy */ 201 } 202 203 /* Wrapper around flex_main, so flex_main can be built as a library. */ 204 int 205 main(argc, argv) 206 int argc; 207 char *argv[]; 208 { 209 #if ENABLE_NLS 210 #if HAVE_LOCALE_H 211 setlocale(LC_MESSAGES, ""); 212 setlocale(LC_CTYPE, ""); 213 textdomain(PACKAGE); 214 bindtextdomain(PACKAGE, LOCALEDIR); 215 #endif 216 #endif 217 218 if (pledge("stdio rpath wpath cpath proc exec", NULL) == -1) { 219 fprintf(stderr, _("%s: pledge\n"), 220 program_name); 221 exit(1); 222 } 223 return flex_main(argc, argv); 224 } 225 226 /* check_options - check user-specified options */ 227 228 void 229 check_options() 230 { 231 int i; 232 233 if (lex_compat) { 234 if (C_plus_plus) 235 flexerror(_("Can't use -+ with -l option")); 236 237 if (fulltbl || fullspd) 238 flexerror(_("Can't use -f or -F with -l option")); 239 240 if (reentrant || bison_bridge_lval) 241 flexerror(_ 242 ("Can't use --reentrant or --bison-bridge with -l option")); 243 244 yytext_is_array = true; 245 do_yylineno = true; 246 use_read = false; 247 } 248 #if 0 249 /* This makes no sense whatsoever. I'm removing it. */ 250 if (do_yylineno) 251 /* This should really be "maintain_backup_tables = true" */ 252 reject_really_used = true; 253 #endif 254 255 if (csize == unspecified) { 256 if ((fulltbl || fullspd) && !useecs) 257 csize = DEFAULT_CSIZE; 258 else 259 csize = CSIZE; 260 } 261 if (interactive == unspecified) { 262 if (fulltbl || fullspd) 263 interactive = false; 264 else 265 interactive = true; 266 } 267 if (fulltbl || fullspd) { 268 if (usemecs) 269 flexerror(_ 270 ("-Cf/-CF and -Cm don't make sense together")); 271 272 if (interactive) 273 flexerror(_("-Cf/-CF and -I are incompatible")); 274 275 if (lex_compat) 276 flexerror(_ 277 ("-Cf/-CF are incompatible with lex-compatibility mode")); 278 279 280 if (fulltbl && fullspd) 281 flexerror(_ 282 ("-Cf and -CF are mutually exclusive")); 283 } 284 if (C_plus_plus && fullspd) 285 flexerror(_("Can't use -+ with -CF option")); 286 287 if (C_plus_plus && yytext_is_array) { 288 warn(_("%array incompatible with -+ option")); 289 yytext_is_array = false; 290 } 291 if (C_plus_plus && (reentrant)) 292 flexerror(_("Options -+ and --reentrant are mutually exclusive.")); 293 294 if (C_plus_plus && bison_bridge_lval) 295 flexerror(_("bison bridge not supported for the C++ scanner.")); 296 297 298 if (useecs) { /* Set up doubly-linked equivalence classes. */ 299 300 /* 301 * We loop all the way up to csize, since ecgroup[csize] is 302 * the position used for NUL characters. 303 */ 304 ecgroup[1] = NIL; 305 306 for (i = 2; i <= csize; ++i) { 307 ecgroup[i] = i - 1; 308 nextecm[i - 1] = i; 309 } 310 311 nextecm[csize] = NIL; 312 } else { 313 /* Put everything in its own equivalence class. */ 314 for (i = 1; i <= csize; ++i) { 315 ecgroup[i] = i; 316 nextecm[i] = BAD_SUBSCRIPT; /* to catch errors */ 317 } 318 } 319 320 if (!ansi_func_defs) 321 buf_m4_define(&m4defs_buf, "M4_YY_NO_ANSI_FUNC_DEFS", NULL); 322 323 if (!ansi_func_protos) 324 buf_m4_define(&m4defs_buf, "M4_YY_NO_ANSI_FUNC_PROTOS", NULL); 325 326 if (extra_type) 327 buf_m4_define(&m4defs_buf, "M4_EXTRA_TYPE_DEFS", extra_type); 328 329 if (!use_stdout) { 330 FILE *prev_stdout; 331 332 if (!did_outfilename) { 333 char *suffix; 334 335 if (C_plus_plus) 336 suffix = "cc"; 337 else 338 suffix = "c"; 339 340 snprintf(outfile_path, sizeof(outfile_path), outfile_template, 341 prefix, suffix); 342 343 outfilename = outfile_path; 344 } 345 prev_stdout = freopen(outfilename, "w+", stdout); 346 347 if (prev_stdout == NULL) 348 lerrsf(_("could not create %s"), outfilename); 349 350 outfile_created = 1; 351 } 352 /* Setup the filter chain. */ 353 output_chain = filter_create_int(NULL, filter_tee_header, headerfilename); 354 filter_create_ext(output_chain, M4, "-P", 0); 355 filter_create_int(output_chain, filter_fix_linedirs, NULL); 356 357 /* For debugging, only run the requested number of filters. */ 358 if (preproc_level > 0) { 359 filter_truncate(output_chain, preproc_level); 360 filter_apply_chain(output_chain); 361 } 362 yyout = stdout; 363 364 365 /* always generate the tablesverify flag. */ 366 buf_m4_define(&m4defs_buf, "M4_YY_TABLES_VERIFY", tablesverify ? "1" : "0"); 367 if (tablesext) 368 gentables = false; 369 370 if (tablesverify) 371 /* force generation of C tables. */ 372 gentables = true; 373 374 375 if (tablesext) { 376 FILE *tablesout; 377 struct yytbl_hdr hdr; 378 char *pname = 0; 379 int nbytes = 0; 380 381 buf_m4_define(&m4defs_buf, "M4_YY_TABLES_EXTERNAL", NULL); 382 383 if (!tablesfilename) { 384 nbytes = strlen(prefix) + strlen(tablesfile_template) + 2; 385 tablesfilename = pname = (char *) calloc(nbytes, 1); 386 snprintf(pname, nbytes, tablesfile_template, prefix); 387 } 388 if ((tablesout = fopen(tablesfilename, "w")) == NULL) 389 lerrsf(_("could not create %s"), tablesfilename); 390 free(pname); 391 tablesfilename = 0; 392 393 yytbl_writer_init(&tableswr, tablesout); 394 395 nbytes = strlen(prefix) + strlen("tables") + 2; 396 tablesname = (char *) calloc(nbytes, 1); 397 snprintf(tablesname, nbytes, "%stables", prefix); 398 yytbl_hdr_init(&hdr, flex_version, tablesname); 399 400 if (yytbl_hdr_fwrite(&tableswr, &hdr) <= 0) 401 flexerror(_("could not write tables header")); 402 } 403 if (skelname && (skelfile = fopen(skelname, "r")) == NULL) 404 lerrsf(_("can't open skeleton file %s"), skelname); 405 406 if (reentrant) { 407 buf_m4_define(&m4defs_buf, "M4_YY_REENTRANT", NULL); 408 if (yytext_is_array) 409 buf_m4_define(&m4defs_buf, "M4_YY_TEXT_IS_ARRAY", NULL); 410 } 411 if (bison_bridge_lval) 412 buf_m4_define(&m4defs_buf, "M4_YY_BISON_LVAL", NULL); 413 414 if (bison_bridge_lloc) 415 buf_m4_define(&m4defs_buf, "<M4_YY_BISON_LLOC>", NULL); 416 417 buf_m4_define(&m4defs_buf, "M4_YY_PREFIX", prefix); 418 419 if (did_outfilename) 420 line_directive_out(stdout, 0); 421 422 if (do_yylineno) 423 buf_m4_define(&m4defs_buf, "M4_YY_USE_LINENO", NULL); 424 425 /* Create the alignment type. */ 426 buf_strdefine(&userdef_buf, "YY_INT_ALIGNED", 427 long_align ? "long int" : "short int"); 428 429 /* Define the start condition macros. */ 430 { 431 struct Buf tmpbuf; 432 buf_init(&tmpbuf, sizeof(char)); 433 for (i = 1; i <= lastsc; i++) { 434 char *str, *fmt = "#define %s %d\n"; 435 size_t strsz; 436 437 str = (char *) malloc(strsz = strlen(fmt) + strlen(scname[i]) + (int) (1 + log10(i)) + 2); 438 if (!str) 439 flexfatal(_("allocation of macro definition failed")); 440 snprintf(str, strsz, fmt, scname[i], i - 1); 441 buf_strappend(&tmpbuf, str); 442 free(str); 443 } 444 buf_m4_define(&m4defs_buf, "M4_YY_SC_DEFS", tmpbuf.elts); 445 buf_destroy(&tmpbuf); 446 } 447 448 /* This is where we begin writing to the file. */ 449 450 /* Dump the %top code. */ 451 if (top_buf.elts) 452 outn((char *) top_buf.elts); 453 454 /* Dump the m4 definitions. */ 455 buf_print_strings(&m4defs_buf, stdout); 456 m4defs_buf.nelts = 0; /* memory leak here. */ 457 458 /* Place a bogus line directive, it will be fixed in the filter. */ 459 outn("#line 0 \"M4_YY_OUTFILE_NAME\"\n"); 460 461 /* Dump the user defined preproc directives. */ 462 if (userdef_buf.elts) 463 outn((char *) (userdef_buf.elts)); 464 465 skelout(); 466 /* %% [1.0] */ 467 } 468 469 /* flexend - terminate flex 470 * 471 * note 472 * This routine does not return. 473 */ 474 475 void 476 flexend(exit_status) 477 int exit_status; 478 479 { 480 static int called_before = -1; /* prevent infinite recursion. */ 481 int tblsiz; 482 483 if (++called_before) 484 FLEX_EXIT(exit_status); 485 486 if (skelfile != NULL) { 487 if (ferror(skelfile)) 488 lerrsf(_("input error reading skeleton file %s"), 489 skelname); 490 491 else if (fclose(skelfile)) 492 lerrsf(_("error closing skeleton file %s"), 493 skelname); 494 } 495 #if 0 496 fprintf(header_out, 497 "#ifdef YY_HEADER_EXPORT_START_CONDITIONS\n"); 498 fprintf(header_out, 499 "/* Beware! Start conditions are not prefixed. */\n"); 500 501 /* Special case for "INITIAL" */ 502 fprintf(header_out, 503 "#undef INITIAL\n#define INITIAL 0\n"); 504 for (i = 2; i <= lastsc; i++) 505 fprintf(header_out, "#define %s %d\n", scname[i], i - 1); 506 fprintf(header_out, 507 "#endif /* YY_HEADER_EXPORT_START_CONDITIONS */\n\n"); 508 509 /* 510 * Kill ALL flex-related macros. This is so the user can #include 511 * more than one generated header file. 512 */ 513 fprintf(header_out, "#ifndef YY_HEADER_NO_UNDEFS\n"); 514 fprintf(header_out, 515 "/* Undefine all internal macros, etc., that do no belong in the header. */\n\n"); 516 517 { 518 const char *undef_list[] = { 519 520 "BEGIN", 521 "ECHO", 522 "EOB_ACT_CONTINUE_SCAN", 523 "EOB_ACT_END_OF_FILE", 524 "EOB_ACT_LAST_MATCH", 525 "FLEX_SCANNER", 526 "FLEX_STD", 527 "REJECT", 528 "YYFARGS0", 529 "YYFARGS1", 530 "YYFARGS2", 531 "YYFARGS3", 532 "YYLMAX", 533 "YYSTATE", 534 "YY_AT_BOL", 535 "YY_BREAK", 536 "YY_BUFFER_EOF_PENDING", 537 "YY_BUFFER_NEW", 538 "YY_BUFFER_NORMAL", 539 "YY_BUF_SIZE", 540 "M4_YY_CALL_LAST_ARG", 541 "M4_YY_CALL_ONLY_ARG", 542 "YY_CURRENT_BUFFER", 543 "YY_DECL", 544 "M4_YY_DECL_LAST_ARG", 545 "M4_YY_DEF_LAST_ARG", 546 "M4_YY_DEF_ONLY_ARG", 547 "YY_DO_BEFORE_ACTION", 548 "YY_END_OF_BUFFER", 549 "YY_END_OF_BUFFER_CHAR", 550 "YY_EXIT_FAILURE", 551 "YY_EXTRA_TYPE", 552 "YY_FATAL_ERROR", 553 "YY_FLEX_DEFINED_ECHO", 554 "YY_FLEX_LEX_COMPAT", 555 "YY_FLEX_MAJOR_VERSION", 556 "YY_FLEX_MINOR_VERSION", 557 "YY_FLEX_SUBMINOR_VERSION", 558 "YY_FLUSH_BUFFER", 559 "YY_G", 560 "YY_INPUT", 561 "YY_INTERACTIVE", 562 "YY_INT_ALIGNED", 563 "YY_LAST_ARG", 564 "YY_LESS_LINENO", 565 "YY_LEX_ARGS", 566 "YY_LEX_DECLARATION", 567 "YY_LEX_PROTO", 568 "YY_MAIN", 569 "YY_MORE_ADJ", 570 "YY_NEED_STRLEN", 571 "YY_NEW_FILE", 572 "YY_NULL", 573 "YY_NUM_RULES", 574 "YY_ONLY_ARG", 575 "YY_PARAMS", 576 "YY_PROTO", 577 "M4_YY_PROTO_LAST_ARG", 578 "M4_YY_PROTO_ONLY_ARG void", 579 "YY_READ_BUF_SIZE", 580 "YY_REENTRANT", 581 "YY_RESTORE_YY_MORE_OFFSET", 582 "YY_RULE_SETUP", 583 "YY_SC_TO_UI", 584 "YY_SKIP_YYWRAP", 585 "YY_START", 586 "YY_START_STACK_INCR", 587 "YY_STATE_EOF", 588 "YY_STDINIT", 589 "YY_TRAILING_HEAD_MASK", 590 "YY_TRAILING_MASK", 591 "YY_USER_ACTION", 592 "YY_USE_CONST", 593 "YY_USE_PROTOS", 594 "unput", 595 "yyTABLES_NAME", 596 "yy_create_buffer", 597 "yy_delete_buffer", 598 "yy_flex_debug", 599 "yy_flush_buffer", 600 "yy_init_buffer", 601 "yy_load_buffer_state", 602 "yy_new_buffer", 603 "yy_scan_buffer", 604 "yy_scan_bytes", 605 "yy_scan_string", 606 "yy_set_bol", 607 "yy_set_interactive", 608 "yy_switch_to_buffer", 609 "yypush_buffer_state", 610 "yypop_buffer_state", 611 "yyensure_buffer_stack", 612 "yyalloc", 613 "yyconst", 614 "yyextra", 615 "yyfree", 616 "yyget_debug", 617 "yyget_extra", 618 "yyget_in", 619 "yyget_leng", 620 "yyget_lineno", 621 "yyget_lloc", 622 "yyget_lval", 623 "yyget_out", 624 "yyget_text", 625 "yyin", 626 "yyleng", 627 "yyless", 628 "yylex", 629 "yylex_destroy", 630 "yylex_init", 631 "yylex_init_extra", 632 "yylineno", 633 "yylloc", 634 "yylval", 635 "yymore", 636 "yyout", 637 "yyrealloc", 638 "yyrestart", 639 "yyset_debug", 640 "yyset_extra", 641 "yyset_in", 642 "yyset_lineno", 643 "yyset_lloc", 644 "yyset_lval", 645 "yyset_out", 646 "yytables_destroy", 647 "yytables_fload", 648 "yyterminate", 649 "yytext", 650 "yytext_ptr", 651 "yywrap", 652 653 /* must be null-terminated */ 654 NULL}; 655 656 657 for (i = 0; undef_list[i] != NULL; i++) 658 fprintf(header_out, "#undef %s\n", undef_list[i]); 659 } 660 661 /* undef any of the auto-generated symbols. */ 662 for (i = 0; i < defs_buf.nelts; i++) { 663 664 /* don't undef start conditions */ 665 if (sclookup(((char **) defs_buf.elts)[i]) > 0) 666 continue; 667 fprintf(header_out, "#undef %s\n", 668 ((char **) defs_buf.elts)[i]); 669 } 670 671 fprintf(header_out, 672 "#endif /* !YY_HEADER_NO_UNDEFS */\n"); 673 fprintf(header_out, "\n"); 674 fprintf(header_out, "#undef %sIN_HEADER\n", prefix); 675 fprintf(header_out, "#endif /* %sHEADER_H */\n", prefix); 676 677 if (ferror(header_out)) 678 lerrsf(_("error creating header file %s"), 679 headerfilename); 680 fflush(header_out); 681 fclose(header_out); 682 #endif 683 684 if (exit_status != 0 && outfile_created) { 685 if (ferror(stdout)) 686 lerrsf(_("error writing output file %s"), 687 outfilename); 688 689 else if ((_stdout_closed = 1) && fclose(stdout)) 690 lerrsf(_("error closing output file %s"), 691 outfilename); 692 693 else if (unlink(outfilename)) 694 lerrsf(_("error deleting output file %s"), 695 outfilename); 696 } 697 if (backing_up_report && backing_up_file) { 698 if (num_backing_up == 0) 699 fprintf(backing_up_file, _("No backing up.\n")); 700 else if (fullspd || fulltbl) 701 fprintf(backing_up_file, 702 _ 703 ("%d backing up (non-accepting) states.\n"), 704 num_backing_up); 705 else 706 fprintf(backing_up_file, 707 _("Compressed tables always back up.\n")); 708 709 if (ferror(backing_up_file)) 710 lerrsf(_("error writing backup file %s"), 711 backing_name); 712 713 else if (fclose(backing_up_file)) 714 lerrsf(_("error closing backup file %s"), 715 backing_name); 716 } 717 if (printstats) { 718 fprintf(stderr, _("%s version %s usage statistics:\n"), 719 program_name, flex_version); 720 721 fprintf(stderr, _(" scanner options: -")); 722 723 if (C_plus_plus) 724 putc('+', stderr); 725 if (backing_up_report) 726 putc('b', stderr); 727 if (ddebug) 728 putc('d', stderr); 729 if (sf_case_ins()) 730 putc('i', stderr); 731 if (lex_compat) 732 putc('l', stderr); 733 if (posix_compat) 734 putc('X', stderr); 735 if (performance_report > 0) 736 putc('p', stderr); 737 if (performance_report > 1) 738 putc('p', stderr); 739 if (spprdflt) 740 putc('s', stderr); 741 if (reentrant) 742 fputs("--reentrant", stderr); 743 if (bison_bridge_lval) 744 fputs("--bison-bridge", stderr); 745 if (bison_bridge_lloc) 746 fputs("--bison-locations", stderr); 747 if (use_stdout) 748 putc('t', stderr); 749 if (printstats) 750 putc('v', stderr); /* always true! */ 751 if (nowarn) 752 putc('w', stderr); 753 if (interactive == false) 754 putc('B', stderr); 755 if (interactive == true) 756 putc('I', stderr); 757 if (!gen_line_dirs) 758 putc('L', stderr); 759 if (trace) 760 putc('T', stderr); 761 762 if (csize == unspecified) 763 /* 764 * We encountered an error fairly early on, so csize 765 * never got specified. Define it now, to prevent 766 * bogus table sizes being written out below. 767 */ 768 csize = 256; 769 770 if (csize == 128) 771 putc('7', stderr); 772 else 773 putc('8', stderr); 774 775 fprintf(stderr, " -C"); 776 777 if (long_align) 778 putc('a', stderr); 779 if (fulltbl) 780 putc('f', stderr); 781 if (fullspd) 782 putc('F', stderr); 783 if (useecs) 784 putc('e', stderr); 785 if (usemecs) 786 putc('m', stderr); 787 if (use_read) 788 putc('r', stderr); 789 790 if (did_outfilename) 791 fprintf(stderr, " -o%s", outfilename); 792 793 if (skelname) 794 fprintf(stderr, " -S%s", skelname); 795 796 if (strcmp(prefix, "yy")) 797 fprintf(stderr, " -P%s", prefix); 798 799 putc('\n', stderr); 800 801 fprintf(stderr, _(" %d/%d NFA states\n"), 802 lastnfa, current_mns); 803 fprintf(stderr, _(" %d/%d DFA states (%d words)\n"), 804 lastdfa, current_max_dfas, totnst); 805 fprintf(stderr, _(" %d rules\n"), 806 num_rules + num_eof_rules - 807 1 /* - 1 for def. rule */ ); 808 809 if (num_backing_up == 0) 810 fprintf(stderr, _(" No backing up\n")); 811 else if (fullspd || fulltbl) 812 fprintf(stderr, 813 _ 814 (" %d backing-up (non-accepting) states\n"), 815 num_backing_up); 816 else 817 fprintf(stderr, 818 _ 819 (" Compressed tables always back-up\n")); 820 821 if (bol_needed) 822 fprintf(stderr, 823 _(" Beginning-of-line patterns used\n")); 824 825 fprintf(stderr, _(" %d/%d start conditions\n"), lastsc, 826 current_max_scs); 827 fprintf(stderr, 828 _ 829 (" %d epsilon states, %d double epsilon states\n"), 830 numeps, eps2); 831 832 if (lastccl == 0) 833 fprintf(stderr, _(" no character classes\n")); 834 else 835 fprintf(stderr, 836 _ 837 (" %d/%d character classes needed %d/%d words of storage, %d reused\n"), 838 lastccl, current_maxccls, 839 cclmap[lastccl] + ccllen[lastccl], 840 current_max_ccl_tbl_size, cclreuse); 841 842 fprintf(stderr, _(" %d state/nextstate pairs created\n"), 843 numsnpairs); 844 fprintf(stderr, 845 _(" %d/%d unique/duplicate transitions\n"), 846 numuniq, numdup); 847 848 if (fulltbl) { 849 tblsiz = lastdfa * numecs; 850 fprintf(stderr, _(" %d table entries\n"), 851 tblsiz); 852 } else { 853 tblsiz = 2 * (lastdfa + numtemps) + 2 * tblend; 854 855 fprintf(stderr, 856 _(" %d/%d base-def entries created\n"), 857 lastdfa + numtemps, current_max_dfas); 858 fprintf(stderr, 859 _ 860 (" %d/%d (peak %d) nxt-chk entries created\n"), 861 tblend, current_max_xpairs, peakpairs); 862 fprintf(stderr, 863 _ 864 (" %d/%d (peak %d) template nxt-chk entries created\n"), 865 numtemps * nummecs, 866 current_max_template_xpairs, 867 numtemps * numecs); 868 fprintf(stderr, _(" %d empty table entries\n"), 869 nummt); 870 fprintf(stderr, _(" %d protos created\n"), 871 numprots); 872 fprintf(stderr, 873 _(" %d templates created, %d uses\n"), 874 numtemps, tmpuses); 875 } 876 877 if (useecs) { 878 tblsiz = tblsiz + csize; 879 fprintf(stderr, 880 _ 881 (" %d/%d equivalence classes created\n"), 882 numecs, csize); 883 } 884 if (usemecs) { 885 tblsiz = tblsiz + numecs; 886 fprintf(stderr, 887 _ 888 (" %d/%d meta-equivalence classes created\n"), 889 nummecs, csize); 890 } 891 fprintf(stderr, 892 _ 893 (" %d (%d saved) hash collisions, %d DFAs equal\n"), 894 hshcol, hshsave, dfaeql); 895 fprintf(stderr, _(" %d sets of reallocations needed\n"), 896 num_reallocs); 897 fprintf(stderr, _(" %d total table entries needed\n"), 898 tblsiz); 899 } 900 FLEX_EXIT(exit_status); 901 } 902 903 904 /* flexinit - initialize flex */ 905 906 void 907 flexinit(argc, argv) 908 int argc; 909 char **argv; 910 { 911 int i, sawcmpflag, rv, optind; 912 char *arg; 913 scanopt_t sopt; 914 915 printstats = syntaxerror = trace = spprdflt = false; 916 lex_compat = posix_compat = C_plus_plus = backing_up_report = 917 ddebug = fulltbl = false; 918 fullspd = long_align = nowarn = yymore_used = continued_action = 919 false; 920 do_yylineno = yytext_is_array = in_rule = reject = do_stdinit = 921 false; 922 yymore_really_used = reject_really_used = unspecified; 923 interactive = csize = unspecified; 924 do_yywrap = gen_line_dirs = usemecs = useecs = true; 925 reentrant = bison_bridge_lval = bison_bridge_lloc = false; 926 performance_report = 0; 927 did_outfilename = 0; 928 prefix = "yy"; 929 yyclass = 0; 930 use_read = use_stdout = false; 931 tablesext = tablesverify = false; 932 gentables = true; 933 tablesfilename = tablesname = NULL; 934 ansi_func_defs = ansi_func_protos = true; 935 936 sawcmpflag = false; 937 938 /* Initialize dynamic array for holding the rule actions. */ 939 action_size = 2048; /* default size of action array in bytes */ 940 action_array = allocate_character_array(action_size); 941 defs1_offset = prolog_offset = action_offset = action_index = 0; 942 action_array[0] = '\0'; 943 944 /* Initialize any buffers. */ 945 buf_init(&userdef_buf, sizeof(char)); /* one long string */ 946 buf_init(&defs_buf, sizeof(char *)); /* list of strings */ 947 buf_init(&yydmap_buf, sizeof(char)); /* one long string */ 948 buf_init(&top_buf, sizeof(char)); /* one long string */ 949 950 { 951 const char *m4defs_init_str[] = {"m4_changequote\n", 952 "m4_changequote([[, ]])\n"}; 953 buf_init(&m4defs_buf, sizeof(char *)); 954 buf_append(&m4defs_buf, &m4defs_init_str, 2); 955 } 956 957 sf_init(); 958 959 /* initialize regex lib */ 960 flex_init_regex(); 961 962 /* Enable C++ if program name ends with '+'. */ 963 program_name = basename2(argv[0], 0); 964 965 if (program_name[0] != '\0' && 966 program_name[strlen(program_name) - 1] == '+') 967 C_plus_plus = true; 968 969 /* read flags */ 970 sopt = scanopt_init(flexopts, argc, argv, 0); 971 if (!sopt) { 972 /* This will only happen when flexopts array is altered. */ 973 fprintf(stderr, 974 _("Internal error. flexopts are malformed.\n")); 975 FLEX_EXIT(1); 976 } 977 while ((rv = scanopt(sopt, &arg, &optind)) != 0) { 978 979 if (rv < 0) { 980 usage(); 981 FLEX_EXIT(1); 982 } 983 switch ((enum flexopt_flag_t) rv) { 984 case OPT_CPLUSPLUS: 985 C_plus_plus = true; 986 break; 987 988 case OPT_BATCH: 989 interactive = false; 990 break; 991 992 case OPT_BACKUP: 993 backing_up_report = true; 994 break; 995 996 case OPT_DONOTHING: 997 break; 998 999 case OPT_COMPRESSION: 1000 if (!sawcmpflag) { 1001 useecs = false; 1002 usemecs = false; 1003 fulltbl = false; 1004 sawcmpflag = true; 1005 } 1006 for (i = 0; arg && arg[i] != '\0'; i++) 1007 switch (arg[i]) { 1008 case 'a': 1009 long_align = true; 1010 break; 1011 1012 case 'e': 1013 useecs = true; 1014 break; 1015 1016 case 'F': 1017 fullspd = true; 1018 break; 1019 1020 case 'f': 1021 fulltbl = true; 1022 break; 1023 1024 case 'm': 1025 usemecs = true; 1026 break; 1027 1028 case 'r': 1029 use_read = true; 1030 break; 1031 1032 default: 1033 lerrif(_ 1034 ("unknown -C option '%c'"), 1035 (int) arg[i]); 1036 break; 1037 } 1038 break; 1039 1040 case OPT_DEBUG: 1041 ddebug = true; 1042 break; 1043 1044 case OPT_NO_DEBUG: 1045 ddebug = false; 1046 break; 1047 1048 case OPT_FULL: 1049 useecs = usemecs = false; 1050 use_read = fulltbl = true; 1051 break; 1052 1053 case OPT_FAST: 1054 useecs = usemecs = false; 1055 use_read = fullspd = true; 1056 break; 1057 1058 case OPT_HELP: 1059 usage(); 1060 FLEX_EXIT(0); 1061 1062 case OPT_INTERACTIVE: 1063 interactive = true; 1064 break; 1065 1066 case OPT_CASE_INSENSITIVE: 1067 sf_set_case_ins(true); 1068 break; 1069 1070 case OPT_LEX_COMPAT: 1071 lex_compat = true; 1072 break; 1073 1074 case OPT_POSIX_COMPAT: 1075 posix_compat = true; 1076 break; 1077 1078 case OPT_PREPROC_LEVEL: 1079 preproc_level = strtol(arg, NULL, 0); 1080 break; 1081 1082 case OPT_MAIN: 1083 buf_strdefine(&userdef_buf, "YY_MAIN", "1"); 1084 do_yywrap = false; 1085 break; 1086 1087 case OPT_NO_MAIN: 1088 buf_strdefine(&userdef_buf, "YY_MAIN", "0"); 1089 break; 1090 1091 case OPT_NO_LINE: 1092 gen_line_dirs = false; 1093 break; 1094 1095 case OPT_OUTFILE: 1096 outfilename = arg; 1097 did_outfilename = 1; 1098 break; 1099 1100 case OPT_PREFIX: 1101 prefix = arg; 1102 break; 1103 1104 case OPT_PERF_REPORT: 1105 ++performance_report; 1106 break; 1107 1108 case OPT_BISON_BRIDGE: 1109 bison_bridge_lval = true; 1110 break; 1111 1112 case OPT_BISON_BRIDGE_LOCATIONS: 1113 bison_bridge_lval = bison_bridge_lloc = true; 1114 break; 1115 1116 case OPT_REENTRANT: 1117 reentrant = true; 1118 break; 1119 1120 case OPT_NO_REENTRANT: 1121 reentrant = false; 1122 break; 1123 1124 case OPT_SKEL: 1125 skelname = arg; 1126 break; 1127 1128 case OPT_DEFAULT: 1129 spprdflt = false; 1130 break; 1131 1132 case OPT_NO_DEFAULT: 1133 spprdflt = true; 1134 break; 1135 1136 case OPT_STDOUT: 1137 use_stdout = true; 1138 break; 1139 1140 case OPT_NO_UNISTD_H: 1141 //buf_strdefine(&userdef_buf, "YY_NO_UNISTD_H", "1"); 1142 buf_m4_define(&m4defs_buf, "M4_YY_NO_UNISTD_H", 0); 1143 break; 1144 1145 case OPT_TABLES_FILE: 1146 tablesext = true; 1147 tablesfilename = arg; 1148 break; 1149 1150 case OPT_TABLES_VERIFY: 1151 tablesverify = true; 1152 break; 1153 1154 case OPT_TRACE: 1155 trace = true; 1156 break; 1157 1158 case OPT_VERBOSE: 1159 printstats = true; 1160 break; 1161 1162 case OPT_VERSION: 1163 printf(_("%s %s\n"), program_name, flex_version); 1164 FLEX_EXIT(0); 1165 1166 case OPT_WARN: 1167 nowarn = false; 1168 break; 1169 1170 case OPT_NO_WARN: 1171 nowarn = true; 1172 break; 1173 1174 case OPT_7BIT: 1175 csize = 128; 1176 break; 1177 1178 case OPT_8BIT: 1179 csize = CSIZE; 1180 break; 1181 1182 case OPT_ALIGN: 1183 long_align = true; 1184 break; 1185 1186 case OPT_NO_ALIGN: 1187 long_align = false; 1188 break; 1189 1190 case OPT_ALWAYS_INTERACTIVE: 1191 buf_m4_define(&m4defs_buf, "M4_YY_ALWAYS_INTERACTIVE", 0); 1192 break; 1193 1194 case OPT_NEVER_INTERACTIVE: 1195 buf_m4_define(&m4defs_buf, "M4_YY_NEVER_INTERACTIVE", 0); 1196 break; 1197 1198 case OPT_ARRAY: 1199 yytext_is_array = true; 1200 break; 1201 1202 case OPT_POINTER: 1203 yytext_is_array = false; 1204 break; 1205 1206 case OPT_ECS: 1207 useecs = true; 1208 break; 1209 1210 case OPT_NO_ECS: 1211 useecs = false; 1212 break; 1213 1214 case OPT_HEADER_FILE: 1215 headerfilename = arg; 1216 break; 1217 1218 case OPT_META_ECS: 1219 usemecs = true; 1220 break; 1221 1222 case OPT_NO_META_ECS: 1223 usemecs = false; 1224 break; 1225 1226 case OPT_PREPROCDEFINE: 1227 { 1228 /* arg is "symbol" or "symbol=definition". */ 1229 char *def; 1230 1231 for (def = arg; 1232 *def != '\0' && *def != '='; ++def); 1233 1234 buf_strappend(&userdef_buf, "#define "); 1235 if (*def == '\0') { 1236 buf_strappend(&userdef_buf, arg); 1237 buf_strappend(&userdef_buf, 1238 " 1\n"); 1239 } else { 1240 buf_strnappend(&userdef_buf, arg, 1241 def - arg); 1242 buf_strappend(&userdef_buf, " "); 1243 buf_strappend(&userdef_buf, 1244 def + 1); 1245 buf_strappend(&userdef_buf, "\n"); 1246 } 1247 } 1248 break; 1249 1250 case OPT_READ: 1251 use_read = true; 1252 break; 1253 1254 case OPT_STACK: 1255 //buf_strdefine(&userdef_buf, "YY_STACK_USED", "1"); 1256 buf_m4_define(&m4defs_buf, "M4_YY_STACK_USED", 0); 1257 break; 1258 1259 case OPT_STDINIT: 1260 do_stdinit = true; 1261 break; 1262 1263 case OPT_NO_STDINIT: 1264 do_stdinit = false; 1265 break; 1266 1267 case OPT_YYCLASS: 1268 yyclass = arg; 1269 break; 1270 1271 case OPT_YYLINENO: 1272 do_yylineno = true; 1273 break; 1274 1275 case OPT_NO_YYLINENO: 1276 do_yylineno = false; 1277 break; 1278 1279 case OPT_YYWRAP: 1280 do_yywrap = true; 1281 break; 1282 1283 case OPT_NO_YYWRAP: 1284 do_yywrap = false; 1285 break; 1286 1287 case OPT_YYMORE: 1288 yymore_really_used = true; 1289 break; 1290 1291 case OPT_NO_YYMORE: 1292 yymore_really_used = false; 1293 break; 1294 1295 case OPT_REJECT: 1296 reject_really_used = true; 1297 break; 1298 1299 case OPT_NO_REJECT: 1300 reject_really_used = false; 1301 break; 1302 1303 case OPT_NO_ANSI_FUNC_DEFS: 1304 ansi_func_defs = false; 1305 break; 1306 1307 case OPT_NO_ANSI_FUNC_PROTOS: 1308 ansi_func_protos = false; 1309 break; 1310 1311 case OPT_NO_YY_PUSH_STATE: 1312 //buf_strdefine(&userdef_buf, "YY_NO_PUSH_STATE", "1"); 1313 buf_m4_define(&m4defs_buf, "M4_YY_NO_PUSH_STATE", 0); 1314 break; 1315 case OPT_NO_YY_POP_STATE: 1316 //buf_strdefine(&userdef_buf, "YY_NO_POP_STATE", "1"); 1317 buf_m4_define(&m4defs_buf, "M4_YY_NO_POP_STATE", 0); 1318 break; 1319 case OPT_NO_YY_TOP_STATE: 1320 //buf_strdefine(&userdef_buf, "YY_NO_TOP_STATE", "1"); 1321 buf_m4_define(&m4defs_buf, "M4_YY_NO_TOP_STATE", 0); 1322 break; 1323 case OPT_NO_UNPUT: 1324 //buf_strdefine(&userdef_buf, "YY_NO_UNPUT", "1"); 1325 buf_m4_define(&m4defs_buf, "M4_YY_NO_UNPUT", 0); 1326 break; 1327 case OPT_NO_YY_SCAN_BUFFER: 1328 //buf_strdefine(&userdef_buf, "YY_NO_SCAN_BUFFER", "1"); 1329 buf_m4_define(&m4defs_buf, "M4_YY_NO_SCAN_BUFFER", 0); 1330 break; 1331 case OPT_NO_YY_SCAN_BYTES: 1332 //buf_strdefine(&userdef_buf, "YY_NO_SCAN_BYTES", "1"); 1333 buf_m4_define(&m4defs_buf, "M4_YY_NO_SCAN_BYTES", 0); 1334 break; 1335 case OPT_NO_YY_SCAN_STRING: 1336 //buf_strdefine(&userdef_buf, "YY_NO_SCAN_STRING", "1"); 1337 buf_m4_define(&m4defs_buf, "M4_YY_NO_SCAN_STRING", 0); 1338 break; 1339 case OPT_NO_YYGET_EXTRA: 1340 //buf_strdefine(&userdef_buf, "YY_NO_GET_EXTRA", "1"); 1341 buf_m4_define(&m4defs_buf, "M4_YY_NO_GET_EXTRA", 0); 1342 break; 1343 case OPT_NO_YYSET_EXTRA: 1344 //buf_strdefine(&userdef_buf, "YY_NO_SET_EXTRA", "1"); 1345 buf_m4_define(&m4defs_buf, "M4_YY_NO_SET_EXTRA", 0); 1346 break; 1347 case OPT_NO_YYGET_LENG: 1348 //buf_strdefine(&userdef_buf, "YY_NO_GET_LENG", "1"); 1349 buf_m4_define(&m4defs_buf, "M4_YY_NO_GET_LENG", 0); 1350 break; 1351 case OPT_NO_YYGET_TEXT: 1352 //buf_strdefine(&userdef_buf, "YY_NO_GET_TEXT", "1"); 1353 buf_m4_define(&m4defs_buf, "M4_YY_NO_GET_TEXT", 0); 1354 break; 1355 case OPT_NO_YYGET_LINENO: 1356 //buf_strdefine(&userdef_buf, "YY_NO_GET_LINENO", "1"); 1357 buf_m4_define(&m4defs_buf, "M4_YY_NO_GET_LINENO", 0); 1358 break; 1359 case OPT_NO_YYSET_LINENO: 1360 //buf_strdefine(&userdef_buf, "YY_NO_SET_LINENO", "1"); 1361 buf_m4_define(&m4defs_buf, "M4_YY_NO_SET_LINENO", 0); 1362 break; 1363 case OPT_NO_YYGET_IN: 1364 //buf_strdefine(&userdef_buf, "YY_NO_GET_IN", "1"); 1365 buf_m4_define(&m4defs_buf, "M4_YY_NO_GET_IN", 0); 1366 break; 1367 case OPT_NO_YYSET_IN: 1368 //buf_strdefine(&userdef_buf, "YY_NO_SET_IN", "1"); 1369 buf_m4_define(&m4defs_buf, "M4_YY_NO_SET_IN", 0); 1370 break; 1371 case OPT_NO_YYGET_OUT: 1372 //buf_strdefine(&userdef_buf, "YY_NO_GET_OUT", "1"); 1373 buf_m4_define(&m4defs_buf, "M4_YY_NO_GET_OUT", 0); 1374 break; 1375 case OPT_NO_YYSET_OUT: 1376 //buf_strdefine(&userdef_buf, "YY_NO_SET_OUT", "1"); 1377 buf_m4_define(&m4defs_buf, "M4_YY_NO_SET_OUT", 0); 1378 break; 1379 case OPT_NO_YYGET_LVAL: 1380 //buf_strdefine(&userdef_buf, "YY_NO_GET_LVAL", "1"); 1381 buf_m4_define(&m4defs_buf, "M4_YY_NO_GET_LVAL", 0); 1382 break; 1383 case OPT_NO_YYSET_LVAL: 1384 //buf_strdefine(&userdef_buf, "YY_NO_SET_LVAL", "1"); 1385 buf_m4_define(&m4defs_buf, "M4_YY_NO_SET_LVAL", 0); 1386 break; 1387 case OPT_NO_YYGET_LLOC: 1388 //buf_strdefine(&userdef_buf, "YY_NO_GET_LLOC", "1"); 1389 buf_m4_define(&m4defs_buf, "M4_YY_NO_GET_LLOC", 0); 1390 break; 1391 case OPT_NO_YYSET_LLOC: 1392 //buf_strdefine(&userdef_buf, "YY_NO_SET_LLOC", "1"); 1393 buf_m4_define(&m4defs_buf, "M4_YY_NO_SET_LLOC", 0); 1394 break; 1395 1396 } /* switch */ 1397 } /* while scanopt() */ 1398 1399 scanopt_destroy(sopt); 1400 1401 num_input_files = argc - optind; 1402 input_files = argv + optind; 1403 set_input_file(num_input_files > 0 ? input_files[0] : NULL); 1404 1405 lastccl = lastsc = lastdfa = lastnfa = 0; 1406 num_rules = num_eof_rules = default_rule = 0; 1407 numas = numsnpairs = tmpuses = 0; 1408 numecs = numeps = eps2 = num_reallocs = hshcol = dfaeql = totnst = 1409 0; 1410 numuniq = numdup = hshsave = eofseen = datapos = dataline = 0; 1411 num_backing_up = onesp = numprots = 0; 1412 variable_trailing_context_rules = bol_needed = false; 1413 1414 linenum = sectnum = 1; 1415 firstprot = NIL; 1416 1417 /* 1418 * Used in mkprot() so that the first proto goes in slot 1 of the 1419 * proto queue. 1420 */ 1421 lastprot = 1; 1422 1423 set_up_initial_allocations(); 1424 } 1425 1426 1427 /* readin - read in the rules section of the input file(s) */ 1428 1429 void 1430 readin() 1431 { 1432 static char yy_stdinit[] = "FILE *yyin = stdin, *yyout = stdout;"; 1433 static char yy_nostdinit[] = 1434 "FILE *yyin = (FILE *) 0, *yyout = (FILE *) 0;"; 1435 1436 line_directive_out((FILE *) 0, 1); 1437 1438 if (yyparse()) { 1439 pinpoint_message(_("fatal parse error")); 1440 flexend(1); 1441 } 1442 if (syntaxerror) 1443 flexend(1); 1444 1445 /* 1446 * If the user explicitly requested posix compatibility by specifing 1447 * the posix-compat option, then we check for conflicting options. 1448 * However, if the POSIXLY_CORRECT variable is set, then we quietly 1449 * make flex as posix-compatible as possible. This is the 1450 * recommended behavior according to the GNU Coding Standards. 1451 * 1452 * Note: The posix option was added to flex to provide the posix 1453 * behavior of the repeat operator in regular expressions, e.g., 1454 * `ab{3}' 1455 */ 1456 if (posix_compat) { 1457 /* 1458 * TODO: This is where we try to make flex behave according 1459 * to posiz, AND check for conflicting options. How far 1460 * should we go with this? Should we disable all the neat-o 1461 * flex features? 1462 */ 1463 /* 1464 * Update: Estes says no, since other flex features don't 1465 * violate posix. 1466 */ 1467 } 1468 if (getenv("POSIXLY_CORRECT")) { 1469 posix_compat = true; 1470 } 1471 if (backing_up_report) { 1472 backing_up_file = fopen(backing_name, "w"); 1473 if (backing_up_file == NULL) 1474 lerrsf(_ 1475 ("could not create backing-up info file %s"), 1476 backing_name); 1477 } else 1478 backing_up_file = NULL; 1479 1480 if (yymore_really_used == true) 1481 yymore_used = true; 1482 else if (yymore_really_used == false) 1483 yymore_used = false; 1484 1485 if (reject_really_used == true) 1486 reject = true; 1487 else if (reject_really_used == false) 1488 reject = false; 1489 1490 if (performance_report > 0) { 1491 if (lex_compat) { 1492 fprintf(stderr, 1493 _ 1494 ("-l AT&T lex compatibility option entails a large performance penalty\n")); 1495 fprintf(stderr, 1496 _ 1497 (" and may be the actual source of other reported performance penalties\n")); 1498 } else if (do_yylineno) { 1499 fprintf(stderr, 1500 _ 1501 ("%%option yylineno entails a performance penalty ONLY on rules that can match newline characters\n")); 1502 } 1503 if (performance_report > 1) { 1504 if (interactive) 1505 fprintf(stderr, 1506 _ 1507 ("-I (interactive) entails a minor performance penalty\n")); 1508 1509 if (yymore_used) 1510 fprintf(stderr, 1511 _ 1512 ("yymore() entails a minor performance penalty\n")); 1513 } 1514 if (reject) 1515 fprintf(stderr, 1516 _ 1517 ("REJECT entails a large performance penalty\n")); 1518 1519 if (variable_trailing_context_rules) 1520 fprintf(stderr, 1521 _ 1522 ("Variable trailing context rules entail a large performance penalty\n")); 1523 } 1524 if (reject) 1525 real_reject = true; 1526 1527 if (variable_trailing_context_rules) 1528 reject = true; 1529 1530 if ((fulltbl || fullspd) && reject) { 1531 if (real_reject) 1532 flexerror(_ 1533 ("REJECT cannot be used with -f or -F")); 1534 else if (do_yylineno) 1535 flexerror(_ 1536 ("%option yylineno cannot be used with REJECT")); 1537 else 1538 flexerror(_ 1539 ("variable trailing context rules cannot be used with -f or -F")); 1540 } 1541 if (reject) { 1542 out_m4_define("M4_YY_USES_REJECT", NULL); 1543 //outn("\n#define YY_USES_REJECT"); 1544 } 1545 if (!do_yywrap) { 1546 if (!C_plus_plus) { 1547 if (reentrant) 1548 outn("\n#define yywrap(yyscanner) 1"); 1549 else 1550 outn("\n#define yywrap() 1"); 1551 } 1552 outn("#define YY_SKIP_YYWRAP"); 1553 } 1554 if (ddebug) 1555 outn("\n#define FLEX_DEBUG"); 1556 1557 OUT_BEGIN_CODE(); 1558 if (csize == 256) 1559 outn("typedef unsigned char YY_CHAR;"); 1560 else 1561 outn("typedef char YY_CHAR;"); 1562 OUT_END_CODE(); 1563 1564 if (C_plus_plus) { 1565 outn("#define yytext_ptr yytext"); 1566 1567 if (interactive) 1568 outn("#define YY_INTERACTIVE"); 1569 } else { 1570 OUT_BEGIN_CODE(); 1571 /* In reentrant scanner, stdinit is handled in flex.skl. */ 1572 if (do_stdinit) { 1573 if (reentrant) { 1574 outn("#define YY_STDINIT"); 1575 } 1576 outn(yy_stdinit); 1577 } else { 1578 if (!reentrant) 1579 outn(yy_nostdinit); 1580 } 1581 OUT_END_CODE(); 1582 } 1583 1584 OUT_BEGIN_CODE(); 1585 if (fullspd) 1586 outn("typedef yyconst struct yy_trans_info *yy_state_type;"); 1587 else if (!C_plus_plus) 1588 outn("typedef int yy_state_type;"); 1589 OUT_END_CODE(); 1590 1591 if (lex_compat) 1592 outn("#define YY_FLEX_LEX_COMPAT"); 1593 1594 if (!C_plus_plus && !reentrant) { 1595 outn("extern int yylineno;"); 1596 OUT_BEGIN_CODE(); 1597 outn("int yylineno = 1;"); 1598 OUT_END_CODE(); 1599 } 1600 if (C_plus_plus) { 1601 outn("\n#include <FlexLexer.h>"); 1602 1603 if (!do_yywrap) { 1604 outn("\nint yyFlexLexer::yywrap() { return 1; }"); 1605 } 1606 if (yyclass) { 1607 outn("int yyFlexLexer::yylex()"); 1608 outn("\t{"); 1609 outn("\tLexerError( \"yyFlexLexer::yylex invoked but %option yyclass used\" );"); 1610 outn("\treturn 0;"); 1611 outn("\t}"); 1612 1613 out_str("\n#define YY_DECL int %s::yylex()\n", 1614 yyclass); 1615 } 1616 } else { 1617 1618 /* 1619 * Watch out: yytext_ptr is a variable when yytext is an 1620 * array, but it's a macro when yytext is a pointer. 1621 */ 1622 if (yytext_is_array) { 1623 if (!reentrant) 1624 outn("extern char yytext[];\n"); 1625 } else { 1626 if (reentrant) { 1627 outn("#define yytext_ptr yytext_r"); 1628 } else { 1629 outn("extern char *yytext;"); 1630 outn("#define yytext_ptr yytext"); 1631 } 1632 } 1633 1634 if (yyclass) 1635 flexerror(_ 1636 ("%option yyclass only meaningful for C++ scanners")); 1637 } 1638 1639 if (useecs) 1640 numecs = cre8ecs(nextecm, ecgroup, csize); 1641 else 1642 numecs = csize; 1643 1644 /* Now map the equivalence class for NUL to its expected place. */ 1645 ecgroup[0] = ecgroup[csize]; 1646 NUL_ec = ABS(ecgroup[0]); 1647 1648 if (useecs) 1649 ccl2ecl(); 1650 } 1651 1652 1653 /* set_up_initial_allocations - allocate memory for internal tables */ 1654 1655 void 1656 set_up_initial_allocations() 1657 { 1658 maximum_mns = (long_align ? MAXIMUM_MNS_LONG : MAXIMUM_MNS); 1659 current_mns = INITIAL_MNS; 1660 firstst = allocate_integer_array(current_mns); 1661 lastst = allocate_integer_array(current_mns); 1662 finalst = allocate_integer_array(current_mns); 1663 transchar = allocate_integer_array(current_mns); 1664 trans1 = allocate_integer_array(current_mns); 1665 trans2 = allocate_integer_array(current_mns); 1666 accptnum = allocate_integer_array(current_mns); 1667 assoc_rule = allocate_integer_array(current_mns); 1668 state_type = allocate_integer_array(current_mns); 1669 1670 current_max_rules = INITIAL_MAX_RULES; 1671 rule_type = allocate_integer_array(current_max_rules); 1672 rule_linenum = allocate_integer_array(current_max_rules); 1673 rule_useful = allocate_integer_array(current_max_rules); 1674 rule_has_nl = allocate_bool_array(current_max_rules); 1675 1676 current_max_scs = INITIAL_MAX_SCS; 1677 scset = allocate_integer_array(current_max_scs); 1678 scbol = allocate_integer_array(current_max_scs); 1679 scxclu = allocate_integer_array(current_max_scs); 1680 sceof = allocate_integer_array(current_max_scs); 1681 scname = allocate_char_ptr_array(current_max_scs); 1682 1683 current_maxccls = INITIAL_MAX_CCLS; 1684 cclmap = allocate_integer_array(current_maxccls); 1685 ccllen = allocate_integer_array(current_maxccls); 1686 cclng = allocate_integer_array(current_maxccls); 1687 ccl_has_nl = allocate_bool_array(current_maxccls); 1688 1689 current_max_ccl_tbl_size = INITIAL_MAX_CCL_TBL_SIZE; 1690 ccltbl = allocate_Character_array(current_max_ccl_tbl_size); 1691 1692 current_max_dfa_size = INITIAL_MAX_DFA_SIZE; 1693 1694 current_max_xpairs = INITIAL_MAX_XPAIRS; 1695 nxt = allocate_integer_array(current_max_xpairs); 1696 chk = allocate_integer_array(current_max_xpairs); 1697 1698 current_max_template_xpairs = INITIAL_MAX_TEMPLATE_XPAIRS; 1699 tnxt = allocate_integer_array(current_max_template_xpairs); 1700 1701 current_max_dfas = INITIAL_MAX_DFAS; 1702 base = allocate_integer_array(current_max_dfas); 1703 def = allocate_integer_array(current_max_dfas); 1704 dfasiz = allocate_integer_array(current_max_dfas); 1705 accsiz = allocate_integer_array(current_max_dfas); 1706 dhash = allocate_integer_array(current_max_dfas); 1707 dss = allocate_int_ptr_array(current_max_dfas); 1708 dfaacc = allocate_dfaacc_union(current_max_dfas); 1709 1710 nultrans = (int *) 0; 1711 } 1712 1713 1714 /* extracts basename from path, optionally stripping the extension "\.*" 1715 * (same concept as /bin/sh `basename`, but different handling of extension). */ 1716 static char * 1717 basename2(path, strip_ext) 1718 char *path; 1719 int strip_ext; /* boolean */ 1720 { 1721 char *b, *e = 0; 1722 1723 b = path; 1724 for (b = path; *path; path++) 1725 if (*path == '/') 1726 b = path + 1; 1727 else if (*path == '.') 1728 e = path; 1729 1730 if (strip_ext && e && e > b) 1731 *e = '\0'; 1732 return b; 1733 } 1734 1735 void 1736 usage(void) 1737 { 1738 extern char *__progname; 1739 1740 (void) fprintf(stderr, 1741 "usage: %s [-78BbFfhIiLlnpsTtVvw+?] [-C[aeFfmr]] [--help]" 1742 " [--version]\n" 1743 "\t[-ooutput] [-Pprefix] [-Sskeleton] [file ...]\n", __progname); 1744 } 1745