1/* CPP Library. 2 Copyright (C) 1986, 1987, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 3 1999, 2000, 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc. 4 Contributed by Per Bothner, 1994-95. 5 Based on CCCP program by Paul Rubin, June 1986 6 Adapted to ANSI C, Richard Stallman, Jan 1987 7 8This program is free software; you can redistribute it and/or modify it 9under the terms of the GNU General Public License as published by the 10Free Software Foundation; either version 2, or (at your option) any 11later version. 12 13This program is distributed in the hope that it will be useful, 14but WITHOUT ANY WARRANTY; without even the implied warranty of 15MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16GNU General Public License for more details. 17 18You should have received a copy of the GNU General Public License 19along with this program; if not, write to the Free Software 20Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ 21 22#include "config.h" 23#include "system.h" 24#include "cpplib.h" 25#include "internal.h" 26#include "mkdeps.h" 27#include "localedir.h" 28 29static void init_library (void); 30static void mark_named_operators (cpp_reader *); 31static void read_original_filename (cpp_reader *); 32static void read_original_directory (cpp_reader *); 33static void post_options (cpp_reader *); 34 35/* If we have designated initializers (GCC >2.7) these tables can be 36 initialized, constant data. Otherwise, they have to be filled in at 37 runtime. */ 38#if HAVE_DESIGNATED_INITIALIZERS 39 40#define init_trigraph_map() /* Nothing. */ 41#define TRIGRAPH_MAP \ 42__extension__ const uchar _cpp_trigraph_map[UCHAR_MAX + 1] = { 43 44#define END }; 45#define s(p, v) [p] = v, 46 47#else 48 49#define TRIGRAPH_MAP uchar _cpp_trigraph_map[UCHAR_MAX + 1] = { 0 }; \ 50 static void init_trigraph_map (void) { \ 51 unsigned char *x = _cpp_trigraph_map; 52 53#define END } 54#define s(p, v) x[p] = v; 55 56#endif 57 58TRIGRAPH_MAP 59 s('=', '#') s(')', ']') s('!', '|') 60 s('(', '[') s('\'', '^') s('>', '}') 61 s('/', '\\') s('<', '{') s('-', '~') 62END 63 64#undef s 65#undef END 66#undef TRIGRAPH_MAP 67 68/* A set of booleans indicating what CPP features each source language 69 requires. */ 70struct lang_flags 71{ 72 char c99; 73 char cplusplus; 74 char extended_numbers; 75 char extended_identifiers; 76 char std; 77 char cplusplus_comments; 78 char digraphs; 79}; 80 81static const struct lang_flags lang_defaults[] = 82{ /* c99 c++ xnum xid std // digr */ 83 /* GNUC89 */ { 0, 0, 1, 0, 0, 1, 1 }, 84 /* GNUC99 */ { 1, 0, 1, 0, 0, 1, 1 }, 85 /* STDC89 */ { 0, 0, 0, 0, 1, 0, 0 }, 86 /* STDC94 */ { 0, 0, 0, 0, 1, 0, 1 }, 87 /* STDC99 */ { 1, 0, 1, 0, 1, 1, 1 }, 88 /* GNUCXX */ { 0, 1, 1, 0, 0, 1, 1 }, 89 /* CXX98 */ { 0, 1, 1, 0, 1, 1, 1 }, 90 /* ASM */ { 0, 0, 1, 0, 0, 1, 0 } 91 /* xid should be 1 for GNUC99, STDC99, GNUCXX and CXX98 when no 92 longer experimental (when all uses of identifiers in the compiler 93 have been audited for correct handling of extended 94 identifiers). */ 95}; 96 97/* Sets internal flags correctly for a given language. */ 98void 99cpp_set_lang (cpp_reader *pfile, enum c_lang lang) 100{ 101 const struct lang_flags *l = &lang_defaults[(int) lang]; 102 103 CPP_OPTION (pfile, lang) = lang; 104 105 CPP_OPTION (pfile, c99) = l->c99; 106 CPP_OPTION (pfile, cplusplus) = l->cplusplus; 107 CPP_OPTION (pfile, extended_numbers) = l->extended_numbers; 108 CPP_OPTION (pfile, extended_identifiers) = l->extended_identifiers; 109 CPP_OPTION (pfile, std) = l->std; 110 CPP_OPTION (pfile, trigraphs) = l->std; 111 CPP_OPTION (pfile, cplusplus_comments) = l->cplusplus_comments; 112 CPP_OPTION (pfile, digraphs) = l->digraphs; 113} 114 115/* Initialize library global state. */ 116static void 117init_library (void) 118{ 119 static int initialized = 0; 120 121 if (! initialized) 122 { 123 initialized = 1; 124 125 /* Set up the trigraph map. This doesn't need to do anything if 126 we were compiled with a compiler that supports C99 designated 127 initializers. */ 128 init_trigraph_map (); 129 130#ifdef ENABLE_NLS 131 (void) bindtextdomain (PACKAGE, LOCALEDIR); 132#endif 133 } 134} 135 136/* Initialize a cpp_reader structure. */ 137cpp_reader * 138cpp_create_reader (enum c_lang lang, hash_table *table, 139 struct line_maps *line_table) 140{ 141 cpp_reader *pfile; 142 143 /* Initialize this instance of the library if it hasn't been already. */ 144 init_library (); 145 146 pfile = XCNEW (cpp_reader); 147 148 cpp_set_lang (pfile, lang); 149 /* APPLE LOCAL begin -Wnewline-eof 2001-08-23 --sts */ 150 /* Suppress warnings about missing newlines at ends of files. */ 151 CPP_OPTION (pfile, warn_newline_at_eof) = 0; 152 /* APPLE LOCAL end -Wnewline-eof 2001-08-23 --sts */ 153 CPP_OPTION (pfile, warn_multichar) = 1; 154 CPP_OPTION (pfile, discard_comments) = 1; 155 CPP_OPTION (pfile, discard_comments_in_macro_exp) = 1; 156 CPP_OPTION (pfile, show_column) = 1; 157 CPP_OPTION (pfile, tabstop) = 8; 158 CPP_OPTION (pfile, operator_names) = 1; 159 CPP_OPTION (pfile, warn_trigraphs) = 2; 160 CPP_OPTION (pfile, warn_endif_labels) = 1; 161 CPP_OPTION (pfile, warn_deprecated) = 1; 162 CPP_OPTION (pfile, warn_long_long) = !CPP_OPTION (pfile, c99); 163 CPP_OPTION (pfile, dollars_in_ident) = 1; 164 CPP_OPTION (pfile, warn_dollars) = 1; 165 CPP_OPTION (pfile, warn_variadic_macros) = 1; 166 CPP_OPTION (pfile, warn_normalize) = normalized_C; 167 168 /* Default CPP arithmetic to something sensible for the host for the 169 benefit of dumb users like fix-header. */ 170 CPP_OPTION (pfile, precision) = CHAR_BIT * sizeof (long); 171 CPP_OPTION (pfile, char_precision) = CHAR_BIT; 172 CPP_OPTION (pfile, wchar_precision) = CHAR_BIT * sizeof (int); 173 CPP_OPTION (pfile, int_precision) = CHAR_BIT * sizeof (int); 174 CPP_OPTION (pfile, unsigned_char) = 0; 175 CPP_OPTION (pfile, unsigned_wchar) = 1; 176 CPP_OPTION (pfile, bytes_big_endian) = 1; /* does not matter */ 177 178 /* Default to no charset conversion. */ 179 CPP_OPTION (pfile, narrow_charset) = _cpp_default_encoding (); 180 CPP_OPTION (pfile, wide_charset) = 0; 181 182 /* Default the input character set to UTF-8. */ 183 CPP_OPTION (pfile, input_charset) = _cpp_default_encoding (); 184 185 /* A fake empty "directory" used as the starting point for files 186 looked up without a search path. Name cannot be '/' because we 187 don't want to prepend anything at all to filenames using it. All 188 other entries are correct zero-initialized. */ 189 pfile->no_search_path.name = (char *) ""; 190 191 /* Initialize the line map. */ 192 pfile->line_table = line_table; 193 194 /* Initialize lexer state. */ 195 pfile->state.save_comments = ! CPP_OPTION (pfile, discard_comments); 196 197 /* Set up static tokens. */ 198 pfile->avoid_paste.type = CPP_PADDING; 199 pfile->avoid_paste.val.source = NULL; 200 pfile->eof.type = CPP_EOF; 201 pfile->eof.flags = 0; 202 203 /* Create a token buffer for the lexer. */ 204 _cpp_init_tokenrun (&pfile->base_run, 250); 205 pfile->cur_run = &pfile->base_run; 206 pfile->cur_token = pfile->base_run.base; 207 208 /* Initialize the base context. */ 209 pfile->context = &pfile->base_context; 210 pfile->base_context.macro = 0; 211 pfile->base_context.prev = pfile->base_context.next = 0; 212 213 /* Aligned and unaligned storage. */ 214 pfile->a_buff = _cpp_get_buff (pfile, 0); 215 pfile->u_buff = _cpp_get_buff (pfile, 0); 216 217 /* The expression parser stack. */ 218 _cpp_expand_op_stack (pfile); 219 220 /* Initialize the buffer obstack. */ 221 _obstack_begin (&pfile->buffer_ob, 0, 0, 222 (void *(*) (long)) xmalloc, 223 (void (*) (void *)) free); 224 225 _cpp_init_files (pfile); 226 227 _cpp_init_hashtable (pfile, table); 228 229 return pfile; 230} 231 232/* Free resources used by PFILE. Accessing PFILE after this function 233 returns leads to undefined behavior. Returns the error count. */ 234void 235cpp_destroy (cpp_reader *pfile) 236{ 237 cpp_context *context, *contextn; 238 tokenrun *run, *runn; 239 240 free (pfile->op_stack); 241 242 while (CPP_BUFFER (pfile) != NULL) 243 _cpp_pop_buffer (pfile); 244 245 if (pfile->out.base) 246 free (pfile->out.base); 247 248 if (pfile->macro_buffer) 249 { 250 free (pfile->macro_buffer); 251 pfile->macro_buffer = NULL; 252 pfile->macro_buffer_len = 0; 253 } 254 255 if (pfile->deps) 256 deps_free (pfile->deps); 257 obstack_free (&pfile->buffer_ob, 0); 258 259 _cpp_destroy_hashtable (pfile); 260 _cpp_cleanup_files (pfile); 261 _cpp_destroy_iconv (pfile); 262 263 _cpp_free_buff (pfile->a_buff); 264 _cpp_free_buff (pfile->u_buff); 265 _cpp_free_buff (pfile->free_buffs); 266 267 for (run = &pfile->base_run; run; run = runn) 268 { 269 runn = run->next; 270 free (run->base); 271 if (run != &pfile->base_run) 272 free (run); 273 } 274 275 for (context = pfile->base_context.next; context; context = contextn) 276 { 277 contextn = context->next; 278 free (context); 279 } 280 281 free (pfile); 282} 283 284/* This structure defines one built-in identifier. A node will be 285 entered in the hash table under the name NAME, with value VALUE. 286 287 There are two tables of these. builtin_array holds all the 288 "builtin" macros: these are handled by builtin_macro() in 289 macro.c. Builtin is somewhat of a misnomer -- the property of 290 interest is that these macros require special code to compute their 291 expansions. The value is a "builtin_type" enumerator. 292 293 operator_array holds the C++ named operators. These are keywords 294 which act as aliases for punctuators. In C++, they cannot be 295 altered through #define, and #if recognizes them as operators. In 296 C, these are not entered into the hash table at all (but see 297 <iso646.h>). The value is a token-type enumerator. */ 298struct builtin 299{ 300 const uchar *name; 301 unsigned short len; 302 unsigned short value; 303}; 304 305#define B(n, t) { DSC(n), t } 306static const struct builtin builtin_array[] = 307{ 308 B("__TIMESTAMP__", BT_TIMESTAMP), 309 B("__TIME__", BT_TIME), 310 B("__DATE__", BT_DATE), 311 B("__FILE__", BT_FILE), 312 B("__BASE_FILE__", BT_BASE_FILE), 313 B("__LINE__", BT_SPECLINE), 314 B("__INCLUDE_LEVEL__", BT_INCLUDE_LEVEL), 315 B("__COUNTER__", BT_COUNTER), 316 /* Keep builtins not used for -traditional-cpp at the end, and 317 update init_builtins() if any more are added. */ 318 B("_Pragma", BT_PRAGMA), 319 B("__STDC__", BT_STDC), 320}; 321 322static const struct builtin operator_array[] = 323{ 324 B("and", CPP_AND_AND), 325 B("and_eq", CPP_AND_EQ), 326 B("bitand", CPP_AND), 327 B("bitor", CPP_OR), 328 B("compl", CPP_COMPL), 329 B("not", CPP_NOT), 330 B("not_eq", CPP_NOT_EQ), 331 B("or", CPP_OR_OR), 332 B("or_eq", CPP_OR_EQ), 333 B("xor", CPP_XOR), 334 B("xor_eq", CPP_XOR_EQ) 335}; 336#undef B 337 338/* Mark the C++ named operators in the hash table. */ 339static void 340mark_named_operators (cpp_reader *pfile) 341{ 342 const struct builtin *b; 343 344 for (b = operator_array; 345 b < (operator_array + ARRAY_SIZE (operator_array)); 346 b++) 347 { 348 cpp_hashnode *hp = cpp_lookup (pfile, b->name, b->len); 349 hp->flags |= NODE_OPERATOR; 350 hp->is_directive = 0; 351 hp->directive_index = b->value; 352 } 353} 354 355void 356cpp_init_special_builtins (cpp_reader *pfile) 357{ 358 const struct builtin *b; 359 size_t n = ARRAY_SIZE (builtin_array); 360 361 if (CPP_OPTION (pfile, traditional)) 362 n -= 2; 363 else if (! CPP_OPTION (pfile, stdc_0_in_system_headers) 364 || CPP_OPTION (pfile, std)) 365 n--; 366 367 for (b = builtin_array; b < builtin_array + n; b++) 368 { 369 cpp_hashnode *hp = cpp_lookup (pfile, b->name, b->len); 370 hp->type = NT_MACRO; 371 hp->flags |= NODE_BUILTIN | NODE_WARN; 372 hp->value.builtin = (enum builtin_type) b->value; 373 } 374} 375 376/* Read the builtins table above and enter them, and language-specific 377 macros, into the hash table. HOSTED is true if this is a hosted 378 environment. */ 379void 380cpp_init_builtins (cpp_reader *pfile, int hosted) 381{ 382 cpp_init_special_builtins (pfile); 383 384 if (!CPP_OPTION (pfile, traditional) 385 && (! CPP_OPTION (pfile, stdc_0_in_system_headers) 386 || CPP_OPTION (pfile, std))) 387 _cpp_define_builtin (pfile, "__STDC__ 1"); 388 389 if (CPP_OPTION (pfile, cplusplus)) 390 _cpp_define_builtin (pfile, "__cplusplus 1"); 391 else if (CPP_OPTION (pfile, lang) == CLK_ASM) 392 _cpp_define_builtin (pfile, "__ASSEMBLER__ 1"); 393 else if (CPP_OPTION (pfile, lang) == CLK_STDC94) 394 _cpp_define_builtin (pfile, "__STDC_VERSION__ 199409L"); 395 else if (CPP_OPTION (pfile, c99)) 396 _cpp_define_builtin (pfile, "__STDC_VERSION__ 199901L"); 397 398 if (hosted) 399 _cpp_define_builtin (pfile, "__STDC_HOSTED__ 1"); 400 else 401 _cpp_define_builtin (pfile, "__STDC_HOSTED__ 0"); 402 403 if (CPP_OPTION (pfile, objc)) 404 _cpp_define_builtin (pfile, "__OBJC__ 1"); 405} 406 407/* Sanity-checks are dependent on command-line options, so it is 408 called as a subroutine of cpp_read_main_file (). */ 409#if ENABLE_CHECKING 410static void sanity_checks (cpp_reader *); 411static void sanity_checks (cpp_reader *pfile) 412{ 413 cppchar_t test = 0; 414 size_t max_precision = 2 * CHAR_BIT * sizeof (cpp_num_part); 415 416 /* Sanity checks for assumptions about CPP arithmetic and target 417 type precisions made by cpplib. */ 418 test--; 419 if (test < 1) 420 cpp_error (pfile, CPP_DL_ICE, "cppchar_t must be an unsigned type"); 421 422 if (CPP_OPTION (pfile, precision) > max_precision) 423 cpp_error (pfile, CPP_DL_ICE, 424 "preprocessor arithmetic has maximum precision of %lu bits;" 425 " target requires %lu bits", 426 (unsigned long) max_precision, 427 (unsigned long) CPP_OPTION (pfile, precision)); 428 429 if (CPP_OPTION (pfile, precision) < CPP_OPTION (pfile, int_precision)) 430 cpp_error (pfile, CPP_DL_ICE, 431 "CPP arithmetic must be at least as precise as a target int"); 432 433 if (CPP_OPTION (pfile, char_precision) < 8) 434 cpp_error (pfile, CPP_DL_ICE, "target char is less than 8 bits wide"); 435 436 if (CPP_OPTION (pfile, wchar_precision) < CPP_OPTION (pfile, char_precision)) 437 cpp_error (pfile, CPP_DL_ICE, 438 "target wchar_t is narrower than target char"); 439 440 if (CPP_OPTION (pfile, int_precision) < CPP_OPTION (pfile, char_precision)) 441 cpp_error (pfile, CPP_DL_ICE, 442 "target int is narrower than target char"); 443 444 /* This is assumed in eval_token() and could be fixed if necessary. */ 445 if (sizeof (cppchar_t) > sizeof (cpp_num_part)) 446 cpp_error (pfile, CPP_DL_ICE, 447 "CPP half-integer narrower than CPP character"); 448 449 if (CPP_OPTION (pfile, wchar_precision) > BITS_PER_CPPCHAR_T) 450 cpp_error (pfile, CPP_DL_ICE, 451 "CPP on this host cannot handle wide character constants over" 452 " %lu bits, but the target requires %lu bits", 453 (unsigned long) BITS_PER_CPPCHAR_T, 454 (unsigned long) CPP_OPTION (pfile, wchar_precision)); 455} 456#else 457# define sanity_checks(PFILE) 458#endif 459 460/* This is called after options have been parsed, and partially 461 processed. */ 462void 463cpp_post_options (cpp_reader *pfile) 464{ 465 sanity_checks (pfile); 466 467 post_options (pfile); 468 469 /* Mark named operators before handling command line macros. */ 470 if (CPP_OPTION (pfile, cplusplus) && CPP_OPTION (pfile, operator_names)) 471 mark_named_operators (pfile); 472} 473 474/* Setup for processing input from the file named FNAME, or stdin if 475 it is the empty string. Return the original filename 476 on success (e.g. foo.i->foo.c), or NULL on failure. */ 477const char * 478cpp_read_main_file (cpp_reader *pfile, const char *fname) 479{ 480 if (CPP_OPTION (pfile, deps.style) != DEPS_NONE) 481 { 482 if (!pfile->deps) 483 pfile->deps = deps_init (); 484 485 /* Set the default target (if there is none already). */ 486 deps_add_default_target (pfile->deps, fname); 487 } 488 489 pfile->main_file 490 = _cpp_find_file (pfile, fname, &pfile->no_search_path, false, 0); 491 if (_cpp_find_failed (pfile->main_file)) 492 return NULL; 493 494 _cpp_stack_file (pfile, pfile->main_file, false); 495 496 /* For foo.i, read the original filename foo.c now, for the benefit 497 of the front ends. */ 498 if (CPP_OPTION (pfile, preprocessed)) 499 { 500 read_original_filename (pfile); 501 fname = pfile->line_table->maps[pfile->line_table->used-1].to_file; 502 } 503 return fname; 504} 505 506/* For preprocessed files, if the first tokens are of the form # NUM. 507 handle the directive so we know the original file name. This will 508 generate file_change callbacks, which the front ends must handle 509 appropriately given their state of initialization. */ 510static void 511read_original_filename (cpp_reader *pfile) 512{ 513 const cpp_token *token, *token1; 514 515 /* Lex ahead; if the first tokens are of the form # NUM, then 516 process the directive, otherwise back up. */ 517 token = _cpp_lex_direct (pfile); 518 if (token->type == CPP_HASH) 519 { 520 pfile->state.in_directive = 1; 521 token1 = _cpp_lex_direct (pfile); 522 _cpp_backup_tokens (pfile, 1); 523 pfile->state.in_directive = 0; 524 525 /* If it's a #line directive, handle it. */ 526 if (token1->type == CPP_NUMBER) 527 { 528 _cpp_handle_directive (pfile, token->flags & PREV_WHITE); 529 read_original_directory (pfile); 530 return; 531 } 532 } 533 534 /* Backup as if nothing happened. */ 535 _cpp_backup_tokens (pfile, 1); 536} 537 538/* For preprocessed files, if the tokens following the first filename 539 line is of the form # <line> "/path/name//", handle the 540 directive so we know the original current directory. */ 541static void 542read_original_directory (cpp_reader *pfile) 543{ 544 const cpp_token *hash, *token; 545 546 /* Lex ahead; if the first tokens are of the form # NUM, then 547 process the directive, otherwise back up. */ 548 hash = _cpp_lex_direct (pfile); 549 if (hash->type != CPP_HASH) 550 { 551 _cpp_backup_tokens (pfile, 1); 552 return; 553 } 554 555 token = _cpp_lex_direct (pfile); 556 557 if (token->type != CPP_NUMBER) 558 { 559 _cpp_backup_tokens (pfile, 2); 560 return; 561 } 562 563 token = _cpp_lex_direct (pfile); 564 565 if (token->type != CPP_STRING 566 || ! (token->val.str.len >= 5 567 && token->val.str.text[token->val.str.len-2] == '/' 568 && token->val.str.text[token->val.str.len-3] == '/')) 569 { 570 _cpp_backup_tokens (pfile, 3); 571 return; 572 } 573 574 if (pfile->cb.dir_change) 575 { 576 char *debugdir = (char *) alloca (token->val.str.len - 3); 577 578 memcpy (debugdir, (const char *) token->val.str.text + 1, 579 token->val.str.len - 4); 580 debugdir[token->val.str.len - 4] = '\0'; 581 582 pfile->cb.dir_change (pfile, debugdir); 583 } 584} 585 586/* This is called at the end of preprocessing. It pops the last 587 buffer and writes dependency output, and returns the number of 588 errors. 589 590 Maybe it should also reset state, such that you could call 591 cpp_start_read with a new filename to restart processing. */ 592int 593cpp_finish (cpp_reader *pfile, FILE *deps_stream) 594{ 595 /* Warn about unused macros before popping the final buffer. */ 596 if (CPP_OPTION (pfile, warn_unused_macros)) 597 cpp_forall_identifiers (pfile, _cpp_warn_if_unused_macro, NULL); 598 599 /* lex.c leaves the final buffer on the stack. This it so that 600 it returns an unending stream of CPP_EOFs to the client. If we 601 popped the buffer, we'd dereference a NULL buffer pointer and 602 segfault. It's nice to allow the client to do worry-free excess 603 cpp_get_token calls. */ 604 while (pfile->buffer) 605 _cpp_pop_buffer (pfile); 606 607 /* Don't write the deps file if there are errors. */ 608 if (CPP_OPTION (pfile, deps.style) != DEPS_NONE 609 && deps_stream && pfile->errors == 0) 610 { 611 deps_write (pfile->deps, deps_stream, 72); 612 613 if (CPP_OPTION (pfile, deps.phony_targets)) 614 deps_phony_targets (pfile->deps, deps_stream); 615 } 616 617 /* Report on headers that could use multiple include guards. */ 618 if (CPP_OPTION (pfile, print_include_names)) 619 _cpp_report_missing_guards (pfile); 620 621 return pfile->errors; 622} 623 624static void 625post_options (cpp_reader *pfile) 626{ 627 /* -Wtraditional is not useful in C++ mode. */ 628 if (CPP_OPTION (pfile, cplusplus)) 629 CPP_OPTION (pfile, warn_traditional) = 0; 630 631 /* Permanently disable macro expansion if we are rescanning 632 preprocessed text. Read preprocesed source in ISO mode. */ 633 if (CPP_OPTION (pfile, preprocessed)) 634 { 635 if (!CPP_OPTION (pfile, directives_only)) 636 pfile->state.prevent_expansion = 1; 637 CPP_OPTION (pfile, traditional) = 0; 638 } 639 640 if (CPP_OPTION (pfile, warn_trigraphs) == 2) 641 CPP_OPTION (pfile, warn_trigraphs) = !CPP_OPTION (pfile, trigraphs); 642 643 if (CPP_OPTION (pfile, traditional)) 644 { 645 CPP_OPTION (pfile, cplusplus_comments) = 0; 646 647 /* Traditional CPP does not accurately track column information. */ 648 CPP_OPTION (pfile, show_column) = 0; 649 CPP_OPTION (pfile, trigraphs) = 0; 650 CPP_OPTION (pfile, warn_trigraphs) = 0; 651 } 652} 653