1 /* Part of CPP library. 2 Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 3 2008, 2009 Free Software Foundation, Inc. 4 5 This program is free software; you can redistribute it and/or modify it 6 under the terms of the GNU General Public License as published by the 7 Free Software Foundation; either version 3, or (at your option) any 8 later version. 9 10 This program is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 GNU General Public License for more details. 14 15 You should have received a copy of the GNU General Public License 16 along with this program; see the file COPYING3. If not see 17 <http://www.gnu.org/licenses/>. */ 18 19 /* This header defines all the internal data structures and functions 20 that need to be visible across files. It should not be used outside 21 cpplib. */ 22 23 #ifndef LIBCPP_INTERNAL_H 24 #define LIBCPP_INTERNAL_H 25 26 #include "symtab.h" 27 #include "cpp-id-data.h" 28 29 #if HAVE_ICONV 30 #include <iconv.h> 31 #else 32 #define HAVE_ICONV 0 33 typedef int iconv_t; /* dummy */ 34 #endif 35 36 #ifdef __cplusplus 37 extern "C" { 38 #endif 39 40 struct directive; /* Deliberately incomplete. */ 41 struct pending_option; 42 struct op; 43 struct _cpp_strbuf; 44 45 typedef bool (*convert_f) (iconv_t, const unsigned char *, size_t, 46 struct _cpp_strbuf *); 47 struct cset_converter 48 { 49 convert_f func; 50 iconv_t cd; 51 int width; 52 }; 53 54 #define BITS_PER_CPPCHAR_T (CHAR_BIT * sizeof (cppchar_t)) 55 56 /* Test if a sign is valid within a preprocessing number. */ 57 #define VALID_SIGN(c, prevc) \ 58 (((c) == '+' || (c) == '-') && \ 59 ((prevc) == 'e' || (prevc) == 'E' \ 60 || (((prevc) == 'p' || (prevc) == 'P') \ 61 && CPP_OPTION (pfile, extended_numbers)))) 62 63 #define CPP_OPTION(PFILE, OPTION) ((PFILE)->opts.OPTION) 64 #define CPP_BUFFER(PFILE) ((PFILE)->buffer) 65 #define CPP_BUF_COLUMN(BUF, CUR) ((CUR) - (BUF)->line_base) 66 #define CPP_BUF_COL(BUF) CPP_BUF_COLUMN(BUF, (BUF)->cur) 67 68 #define CPP_INCREMENT_LINE(PFILE, COLS_HINT) do { \ 69 const struct line_maps *line_table = PFILE->line_table; \ 70 const struct line_map *map = &line_table->maps[line_table->used-1]; \ 71 linenum_type line = SOURCE_LINE (map, line_table->highest_line); \ 72 linemap_line_start (PFILE->line_table, line + 1, COLS_HINT); \ 73 } while (0) 74 75 /* Maximum nesting of cpp_buffers. We use a static limit, partly for 76 efficiency, and partly to limit runaway recursion. */ 77 #define CPP_STACK_MAX 200 78 79 /* Host alignment handling. */ 80 struct dummy 81 { 82 char c; 83 union 84 { 85 double d; 86 int *p; 87 } u; 88 }; 89 90 #define DEFAULT_ALIGNMENT offsetof (struct dummy, u) 91 #define CPP_ALIGN2(size, align) (((size) + ((align) - 1)) & ~((align) - 1)) 92 #define CPP_ALIGN(size) CPP_ALIGN2 (size, DEFAULT_ALIGNMENT) 93 94 #define _cpp_mark_macro_used(NODE) do { \ 95 if ((NODE)->type == NT_MACRO && !((NODE)->flags & NODE_BUILTIN)) \ 96 (NODE)->value.macro->used = 1; } while (0) 97 98 /* A generic memory buffer, and operations on it. */ 99 typedef struct _cpp_buff _cpp_buff; 100 struct _cpp_buff 101 { 102 struct _cpp_buff *next; 103 unsigned char *base, *cur, *limit; 104 }; 105 106 extern _cpp_buff *_cpp_get_buff (cpp_reader *, size_t); 107 extern void _cpp_release_buff (cpp_reader *, _cpp_buff *); 108 extern void _cpp_extend_buff (cpp_reader *, _cpp_buff **, size_t); 109 extern _cpp_buff *_cpp_append_extend_buff (cpp_reader *, _cpp_buff *, size_t); 110 extern void _cpp_free_buff (_cpp_buff *); 111 extern unsigned char *_cpp_aligned_alloc (cpp_reader *, size_t); 112 extern unsigned char *_cpp_unaligned_alloc (cpp_reader *, size_t); 113 114 #define BUFF_ROOM(BUFF) (size_t) ((BUFF)->limit - (BUFF)->cur) 115 #define BUFF_FRONT(BUFF) ((BUFF)->cur) 116 #define BUFF_LIMIT(BUFF) ((BUFF)->limit) 117 118 /* #include types. */ 119 enum include_type {IT_INCLUDE, IT_INCLUDE_NEXT, IT_IMPORT, IT_CMDLINE}; 120 121 union utoken 122 { 123 const cpp_token *token; 124 const cpp_token **ptoken; 125 }; 126 127 /* A "run" of tokens; part of a chain of runs. */ 128 typedef struct tokenrun tokenrun; 129 struct tokenrun 130 { 131 tokenrun *next, *prev; 132 cpp_token *base, *limit; 133 }; 134 135 /* Accessor macros for struct cpp_context. */ 136 #define FIRST(c) ((c)->u.iso.first) 137 #define LAST(c) ((c)->u.iso.last) 138 #define CUR(c) ((c)->u.trad.cur) 139 #define RLIMIT(c) ((c)->u.trad.rlimit) 140 141 typedef struct cpp_context cpp_context; 142 struct cpp_context 143 { 144 /* Doubly-linked list. */ 145 cpp_context *next, *prev; 146 147 union 148 { 149 /* For ISO macro expansion. Contexts other than the base context 150 are contiguous tokens. e.g. macro expansions, expanded 151 argument tokens. */ 152 struct 153 { 154 union utoken first; 155 union utoken last; 156 } iso; 157 158 /* For traditional macro expansion. */ 159 struct 160 { 161 const unsigned char *cur; 162 const unsigned char *rlimit; 163 } trad; 164 } u; 165 166 /* If non-NULL, a buffer used for storage related to this context. 167 When the context is popped, the buffer is released. */ 168 _cpp_buff *buff; 169 170 /* For a macro context, the macro node, otherwise NULL. */ 171 cpp_hashnode *macro; 172 173 /* True if utoken element is token, else ptoken. */ 174 bool direct_p; 175 }; 176 177 struct lexer_state 178 { 179 /* Nonzero if first token on line is CPP_HASH. */ 180 unsigned char in_directive; 181 182 /* Nonzero if in a directive that will handle padding tokens itself. 183 #include needs this to avoid problems with computed include and 184 spacing between tokens. */ 185 unsigned char directive_wants_padding; 186 187 /* True if we are skipping a failed conditional group. */ 188 unsigned char skipping; 189 190 /* Nonzero if in a directive that takes angle-bracketed headers. */ 191 unsigned char angled_headers; 192 193 /* Nonzero if in a #if or #elif directive. */ 194 unsigned char in_expression; 195 196 /* Nonzero to save comments. Turned off if discard_comments, and in 197 all directives apart from #define. */ 198 unsigned char save_comments; 199 200 /* Nonzero if lexing __VA_ARGS__ is valid. */ 201 unsigned char va_args_ok; 202 203 /* Nonzero if lexing poisoned identifiers is valid. */ 204 unsigned char poisoned_ok; 205 206 /* Nonzero to prevent macro expansion. */ 207 unsigned char prevent_expansion; 208 209 /* Nonzero when parsing arguments to a function-like macro. */ 210 unsigned char parsing_args; 211 212 /* Nonzero if prevent_expansion is true only because output is 213 being discarded. */ 214 unsigned char discarding_output; 215 216 /* Nonzero to skip evaluating part of an expression. */ 217 unsigned int skip_eval; 218 219 /* Nonzero when handling a deferred pragma. */ 220 unsigned char in_deferred_pragma; 221 222 /* Nonzero if the deferred pragma being handled allows macro expansion. */ 223 unsigned char pragma_allow_expansion; 224 }; 225 226 /* Special nodes - identifiers with predefined significance. */ 227 struct spec_nodes 228 { 229 cpp_hashnode *n_defined; /* defined operator */ 230 cpp_hashnode *n_true; /* C++ keyword true */ 231 cpp_hashnode *n_false; /* C++ keyword false */ 232 cpp_hashnode *n__VA_ARGS__; /* C99 vararg macros */ 233 }; 234 235 typedef struct _cpp_line_note _cpp_line_note; 236 struct _cpp_line_note 237 { 238 /* Location in the clean line the note refers to. */ 239 const unsigned char *pos; 240 241 /* Type of note. The 9 'from' trigraph characters represent those 242 trigraphs, '\\' an escaped newline, ' ' an escaped newline with 243 intervening space, 0 represents a note that has already been handled, 244 and anything else is invalid. */ 245 unsigned int type; 246 }; 247 248 /* Represents the contents of a file cpplib has read in. */ 249 struct cpp_buffer 250 { 251 const unsigned char *cur; /* Current location. */ 252 const unsigned char *line_base; /* Start of current physical line. */ 253 const unsigned char *next_line; /* Start of to-be-cleaned logical line. */ 254 255 const unsigned char *buf; /* Entire character buffer. */ 256 const unsigned char *rlimit; /* Writable byte at end of file. */ 257 258 _cpp_line_note *notes; /* Array of notes. */ 259 unsigned int cur_note; /* Next note to process. */ 260 unsigned int notes_used; /* Number of notes. */ 261 unsigned int notes_cap; /* Size of allocated array. */ 262 263 struct cpp_buffer *prev; 264 265 /* Pointer into the file table; non-NULL if this is a file buffer. 266 Used for include_next and to record control macros. */ 267 struct _cpp_file *file; 268 269 /* Saved value of __TIMESTAMP__ macro - date and time of last modification 270 of the assotiated file. */ 271 const unsigned char *timestamp; 272 273 /* Value of if_stack at start of this file. 274 Used to prohibit unmatched #endif (etc) in an include file. */ 275 struct if_stack *if_stack; 276 277 /* True if we need to get the next clean line. */ 278 bool need_line; 279 280 /* True if we have already warned about C++ comments in this file. 281 The warning happens only for C89 extended mode with -pedantic on, 282 or for -Wtraditional, and only once per file (otherwise it would 283 be far too noisy). */ 284 unsigned int warned_cplusplus_comments : 1; 285 286 /* True if we don't process trigraphs and escaped newlines. True 287 for preprocessed input, command line directives, and _Pragma 288 buffers. */ 289 unsigned int from_stage3 : 1; 290 291 /* At EOF, a buffer is automatically popped. If RETURN_AT_EOF is 292 true, a CPP_EOF token is then returned. Otherwise, the next 293 token from the enclosing buffer is returned. */ 294 unsigned int return_at_eof : 1; 295 296 /* One for a system header, two for a C system header file that therefore 297 needs to be extern "C" protected in C++, and zero otherwise. */ 298 unsigned char sysp; 299 300 /* The directory of the this buffer's file. Its NAME member is not 301 allocated, so we don't need to worry about freeing it. */ 302 struct cpp_dir dir; 303 304 /* Descriptor for converting from the input character set to the 305 source character set. */ 306 struct cset_converter input_cset_desc; 307 }; 308 309 /* The list of saved macros by push_macro pragma. */ 310 struct def_pragma_macro { 311 /* Chain element to previous saved macro. */ 312 struct def_pragma_macro *next; 313 /* Name of the macro. */ 314 char *name; 315 /* The stored macro content. */ 316 cpp_macro *value; 317 }; 318 319 /* A cpp_reader encapsulates the "state" of a pre-processor run. 320 Applying cpp_get_token repeatedly yields a stream of pre-processor 321 tokens. Usually, there is only one cpp_reader object active. */ 322 struct cpp_reader 323 { 324 /* Top of buffer stack. */ 325 cpp_buffer *buffer; 326 327 /* Overlaid buffer (can be different after processing #include). */ 328 cpp_buffer *overlaid_buffer; 329 330 /* Lexer state. */ 331 struct lexer_state state; 332 333 /* Source line tracking. */ 334 struct line_maps *line_table; 335 336 /* The line of the '#' of the current directive. */ 337 source_location directive_line; 338 339 /* Memory buffers. */ 340 _cpp_buff *a_buff; /* Aligned permanent storage. */ 341 _cpp_buff *u_buff; /* Unaligned permanent storage. */ 342 _cpp_buff *free_buffs; /* Free buffer chain. */ 343 344 /* Context stack. */ 345 struct cpp_context base_context; 346 struct cpp_context *context; 347 348 /* If in_directive, the directive if known. */ 349 const struct directive *directive; 350 351 /* Token generated while handling a directive, if any. */ 352 cpp_token directive_result; 353 354 /* When expanding a macro at top-level, this is the location of the 355 macro invocation. */ 356 source_location invocation_location; 357 358 /* True if this call to cpp_get_token should consider setting 359 invocation_location. */ 360 bool set_invocation_location; 361 362 /* Search paths for include files. */ 363 struct cpp_dir *quote_include; /* "" */ 364 struct cpp_dir *bracket_include; /* <> */ 365 struct cpp_dir no_search_path; /* No path. */ 366 367 /* Chain of all hashed _cpp_file instances. */ 368 struct _cpp_file *all_files; 369 370 struct _cpp_file *main_file; 371 372 /* File and directory hash table. */ 373 struct htab *file_hash; 374 struct htab *dir_hash; 375 struct file_hash_entry_pool *file_hash_entries; 376 377 /* Negative path lookup hash table. */ 378 struct htab *nonexistent_file_hash; 379 struct obstack nonexistent_file_ob; 380 381 /* Nonzero means don't look for #include "foo" the source-file 382 directory. */ 383 bool quote_ignores_source_dir; 384 385 /* Nonzero if any file has contained #pragma once or #import has 386 been used. */ 387 bool seen_once_only; 388 389 /* Multiple include optimization. */ 390 const cpp_hashnode *mi_cmacro; 391 const cpp_hashnode *mi_ind_cmacro; 392 bool mi_valid; 393 394 /* Lexing. */ 395 cpp_token *cur_token; 396 tokenrun base_run, *cur_run; 397 unsigned int lookaheads; 398 399 /* Nonzero prevents the lexer from re-using the token runs. */ 400 unsigned int keep_tokens; 401 402 /* Buffer to hold macro definition string. */ 403 unsigned char *macro_buffer; 404 unsigned int macro_buffer_len; 405 406 /* Descriptor for converting from the source character set to the 407 execution character set. */ 408 struct cset_converter narrow_cset_desc; 409 410 /* Descriptor for converting from the source character set to the 411 UTF-8 execution character set. */ 412 struct cset_converter utf8_cset_desc; 413 414 /* Descriptor for converting from the source character set to the 415 UTF-16 execution character set. */ 416 struct cset_converter char16_cset_desc; 417 418 /* Descriptor for converting from the source character set to the 419 UTF-32 execution character set. */ 420 struct cset_converter char32_cset_desc; 421 422 /* Descriptor for converting from the source character set to the 423 wide execution character set. */ 424 struct cset_converter wide_cset_desc; 425 426 /* Date and time text. Calculated together if either is requested. */ 427 const unsigned char *date; 428 const unsigned char *time; 429 430 /* EOF token, and a token forcing paste avoidance. */ 431 cpp_token avoid_paste; 432 cpp_token eof; 433 434 /* Opaque handle to the dependencies of mkdeps.c. */ 435 struct deps *deps; 436 437 /* Obstack holding all macro hash nodes. This never shrinks. 438 See identifiers.c */ 439 struct obstack hash_ob; 440 441 /* Obstack holding buffer and conditional structures. This is a 442 real stack. See directives.c. */ 443 struct obstack buffer_ob; 444 445 /* Pragma table - dynamic, because a library user can add to the 446 list of recognized pragmas. */ 447 struct pragma_entry *pragmas; 448 449 /* Call backs to cpplib client. */ 450 struct cpp_callbacks cb; 451 452 /* Identifier hash table. */ 453 struct ht *hash_table; 454 455 /* Expression parser stack. */ 456 struct op *op_stack, *op_limit; 457 458 /* User visible options. */ 459 struct cpp_options opts; 460 461 /* Special nodes - identifiers with predefined significance to the 462 preprocessor. */ 463 struct spec_nodes spec_nodes; 464 465 /* Whether cpplib owns the hashtable. */ 466 bool our_hashtable; 467 468 /* Traditional preprocessing output buffer (a logical line). */ 469 struct 470 { 471 unsigned char *base; 472 unsigned char *limit; 473 unsigned char *cur; 474 source_location first_line; 475 } out; 476 477 /* Used for buffer overlays by traditional.c. */ 478 const unsigned char *saved_cur, *saved_rlimit, *saved_line_base; 479 480 /* A saved list of the defined macros, for dependency checking 481 of precompiled headers. */ 482 struct cpp_savedstate *savedstate; 483 484 /* Next value of __COUNTER__ macro. */ 485 unsigned int counter; 486 487 /* Table of comments, when state.save_comments is true. */ 488 cpp_comment_table comments; 489 490 /* List of saved macros by push_macro. */ 491 struct def_pragma_macro *pushed_macros; 492 }; 493 494 /* Character classes. Based on the more primitive macros in safe-ctype.h. 495 If the definition of `numchar' looks odd to you, please look up the 496 definition of a pp-number in the C standard [section 6.4.8 of C99]. 497 498 In the unlikely event that characters other than \r and \n enter 499 the set is_vspace, the macro handle_newline() in lex.c must be 500 updated. */ 501 #define _dollar_ok(x) ((x) == '$' && CPP_OPTION (pfile, dollars_in_ident)) 502 503 #define is_idchar(x) (ISIDNUM(x) || _dollar_ok(x)) 504 #define is_numchar(x) ISIDNUM(x) 505 #define is_idstart(x) (ISIDST(x) || _dollar_ok(x)) 506 #define is_numstart(x) ISDIGIT(x) 507 #define is_hspace(x) ISBLANK(x) 508 #define is_vspace(x) IS_VSPACE(x) 509 #define is_nvspace(x) IS_NVSPACE(x) 510 #define is_space(x) IS_SPACE_OR_NUL(x) 511 512 /* This table is constant if it can be initialized at compile time, 513 which is the case if cpp was compiled with GCC >=2.7, or another 514 compiler that supports C99. */ 515 #if HAVE_DESIGNATED_INITIALIZERS 516 extern const unsigned char _cpp_trigraph_map[UCHAR_MAX + 1]; 517 #else 518 extern unsigned char _cpp_trigraph_map[UCHAR_MAX + 1]; 519 #endif 520 521 /* Macros. */ 522 523 static inline int cpp_in_system_header (cpp_reader *); 524 static inline int 525 cpp_in_system_header (cpp_reader *pfile) 526 { 527 return pfile->buffer ? pfile->buffer->sysp : 0; 528 } 529 #define CPP_PEDANTIC(PF) CPP_OPTION (PF, pedantic) 530 #define CPP_WTRADITIONAL(PF) CPP_OPTION (PF, warn_traditional) 531 532 static inline int cpp_in_primary_file (cpp_reader *); 533 static inline int 534 cpp_in_primary_file (cpp_reader *pfile) 535 { 536 return pfile->line_table->depth == 1; 537 } 538 539 /* In macro.c */ 540 extern void _cpp_free_definition (cpp_hashnode *); 541 extern bool _cpp_create_definition (cpp_reader *, cpp_hashnode *); 542 extern void _cpp_pop_context (cpp_reader *); 543 extern void _cpp_push_text_context (cpp_reader *, cpp_hashnode *, 544 const unsigned char *, size_t); 545 extern bool _cpp_save_parameter (cpp_reader *, cpp_macro *, cpp_hashnode *); 546 extern bool _cpp_arguments_ok (cpp_reader *, cpp_macro *, const cpp_hashnode *, 547 unsigned int); 548 extern const unsigned char *_cpp_builtin_macro_text (cpp_reader *, 549 cpp_hashnode *); 550 extern int _cpp_warn_if_unused_macro (cpp_reader *, cpp_hashnode *, void *); 551 extern void _cpp_push_token_context (cpp_reader *, cpp_hashnode *, 552 const cpp_token *, unsigned int); 553 extern void _cpp_backup_tokens_direct (cpp_reader *, unsigned int); 554 555 /* In identifiers.c */ 556 extern void _cpp_init_hashtable (cpp_reader *, hash_table *); 557 extern void _cpp_destroy_hashtable (cpp_reader *); 558 559 /* In files.c */ 560 typedef struct _cpp_file _cpp_file; 561 extern _cpp_file *_cpp_find_file (cpp_reader *, const char *, cpp_dir *, 562 bool, int); 563 extern bool _cpp_find_failed (_cpp_file *); 564 extern void _cpp_mark_file_once_only (cpp_reader *, struct _cpp_file *); 565 extern void _cpp_fake_include (cpp_reader *, const char *); 566 extern bool _cpp_stack_file (cpp_reader *, _cpp_file*, bool); 567 extern bool _cpp_stack_include (cpp_reader *, const char *, int, 568 enum include_type); 569 extern int _cpp_compare_file_date (cpp_reader *, const char *, int); 570 extern void _cpp_report_missing_guards (cpp_reader *); 571 extern void _cpp_init_files (cpp_reader *); 572 extern void _cpp_cleanup_files (cpp_reader *); 573 extern void _cpp_pop_file_buffer (cpp_reader *, struct _cpp_file *); 574 extern bool _cpp_save_file_entries (cpp_reader *pfile, FILE *f); 575 extern bool _cpp_read_file_entries (cpp_reader *, FILE *); 576 extern struct stat *_cpp_get_file_stat (_cpp_file *); 577 578 /* In expr.c */ 579 extern bool _cpp_parse_expr (cpp_reader *, bool); 580 extern struct op *_cpp_expand_op_stack (cpp_reader *); 581 582 /* In lex.c */ 583 extern void _cpp_process_line_notes (cpp_reader *, int); 584 extern void _cpp_clean_line (cpp_reader *); 585 extern bool _cpp_get_fresh_line (cpp_reader *); 586 extern bool _cpp_skip_block_comment (cpp_reader *); 587 extern cpp_token *_cpp_temp_token (cpp_reader *); 588 extern const cpp_token *_cpp_lex_token (cpp_reader *); 589 extern cpp_token *_cpp_lex_direct (cpp_reader *); 590 extern int _cpp_equiv_tokens (const cpp_token *, const cpp_token *); 591 extern void _cpp_init_tokenrun (tokenrun *, unsigned int); 592 extern cpp_hashnode *_cpp_lex_identifier (cpp_reader *, const char *); 593 594 /* In init.c. */ 595 extern void _cpp_maybe_push_include_file (cpp_reader *); 596 extern const char *cpp_named_operator2name (enum cpp_ttype type); 597 598 /* In directives.c */ 599 extern int _cpp_test_assertion (cpp_reader *, unsigned int *); 600 extern int _cpp_handle_directive (cpp_reader *, int); 601 extern void _cpp_define_builtin (cpp_reader *, const char *); 602 extern char ** _cpp_save_pragma_names (cpp_reader *); 603 extern void _cpp_restore_pragma_names (cpp_reader *, char **); 604 extern int _cpp_do__Pragma (cpp_reader *); 605 extern void _cpp_init_directives (cpp_reader *); 606 extern void _cpp_init_internal_pragmas (cpp_reader *); 607 extern void _cpp_do_file_change (cpp_reader *, enum lc_reason, const char *, 608 linenum_type, unsigned int); 609 extern void _cpp_pop_buffer (cpp_reader *); 610 611 /* In directives.c */ 612 struct _cpp_dir_only_callbacks 613 { 614 /* Called to print a block of lines. */ 615 void (*print_lines) (int, const void *, size_t); 616 void (*maybe_print_line) (source_location); 617 }; 618 619 extern void _cpp_preprocess_dir_only (cpp_reader *, 620 const struct _cpp_dir_only_callbacks *); 621 622 /* In traditional.c. */ 623 extern bool _cpp_scan_out_logical_line (cpp_reader *, cpp_macro *); 624 extern bool _cpp_read_logical_line_trad (cpp_reader *); 625 extern void _cpp_overlay_buffer (cpp_reader *pfile, const unsigned char *, 626 size_t); 627 extern void _cpp_remove_overlay (cpp_reader *); 628 extern bool _cpp_create_trad_definition (cpp_reader *, cpp_macro *); 629 extern bool _cpp_expansions_different_trad (const cpp_macro *, 630 const cpp_macro *); 631 extern unsigned char *_cpp_copy_replacement_text (const cpp_macro *, 632 unsigned char *); 633 extern size_t _cpp_replacement_text_len (const cpp_macro *); 634 635 /* In charset.c. */ 636 637 /* The normalization state at this point in the sequence. 638 It starts initialized to all zeros, and at the end 639 'level' is the normalization level of the sequence. */ 640 641 struct normalize_state 642 { 643 /* The previous character. */ 644 cppchar_t previous; 645 /* The combining class of the previous character. */ 646 unsigned char prev_class; 647 /* The lowest normalization level so far. */ 648 enum cpp_normalize_level level; 649 }; 650 #define INITIAL_NORMALIZE_STATE { 0, 0, normalized_KC } 651 #define NORMALIZE_STATE_RESULT(st) ((st)->level) 652 653 /* We saw a character that matches ISIDNUM(), update a 654 normalize_state appropriately. */ 655 #define NORMALIZE_STATE_UPDATE_IDNUM(st) \ 656 ((st)->previous = 0, (st)->prev_class = 0) 657 658 extern cppchar_t _cpp_valid_ucn (cpp_reader *, const unsigned char **, 659 const unsigned char *, int, 660 struct normalize_state *state); 661 extern void _cpp_destroy_iconv (cpp_reader *); 662 extern unsigned char *_cpp_convert_input (cpp_reader *, const char *, 663 unsigned char *, size_t, size_t, 664 const unsigned char **, off_t *); 665 extern const char *_cpp_default_encoding (void); 666 extern cpp_hashnode * _cpp_interpret_identifier (cpp_reader *pfile, 667 const unsigned char *id, 668 size_t len); 669 670 /* Utility routines and macros. */ 671 #define DSC(str) (const unsigned char *)str, sizeof str - 1 672 673 /* These are inline functions instead of macros so we can get type 674 checking. */ 675 static inline int ustrcmp (const unsigned char *, const unsigned char *); 676 static inline int ustrncmp (const unsigned char *, const unsigned char *, 677 size_t); 678 static inline size_t ustrlen (const unsigned char *); 679 static inline unsigned char *uxstrdup (const unsigned char *); 680 static inline unsigned char *ustrchr (const unsigned char *, int); 681 static inline int ufputs (const unsigned char *, FILE *); 682 683 /* Use a const char for the second parameter since it is usually a literal. */ 684 static inline int ustrcspn (const unsigned char *, const char *); 685 686 static inline int 687 ustrcmp (const unsigned char *s1, const unsigned char *s2) 688 { 689 return strcmp ((const char *)s1, (const char *)s2); 690 } 691 692 static inline int 693 ustrncmp (const unsigned char *s1, const unsigned char *s2, size_t n) 694 { 695 return strncmp ((const char *)s1, (const char *)s2, n); 696 } 697 698 static inline int 699 ustrcspn (const unsigned char *s1, const char *s2) 700 { 701 return strcspn ((const char *)s1, s2); 702 } 703 704 static inline size_t 705 ustrlen (const unsigned char *s1) 706 { 707 return strlen ((const char *)s1); 708 } 709 710 static inline unsigned char * 711 uxstrdup (const unsigned char *s1) 712 { 713 return (unsigned char *) xstrdup ((const char *)s1); 714 } 715 716 static inline unsigned char * 717 ustrchr (const unsigned char *s1, int c) 718 { 719 return (unsigned char *) strchr ((const char *)s1, c); 720 } 721 722 static inline int 723 ufputs (const unsigned char *s, FILE *f) 724 { 725 return fputs ((const char *)s, f); 726 } 727 728 #ifdef __cplusplus 729 } 730 #endif 731 732 #endif /* ! LIBCPP_INTERNAL_H */ 733