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 5This program is free software; you can redistribute it and/or modify it 6under the terms of the GNU General Public License as published by the 7Free Software Foundation; either version 3, or (at your option) any 8later version. 9 10This program is distributed in the hope that it will be useful, 11but WITHOUT ANY WARRANTY; without even the implied warranty of 12MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13GNU General Public License for more details. 14 15You should have received a copy of the GNU General Public License 16along 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 33typedef int iconv_t; /* dummy */ 34#endif 35 36#ifdef __cplusplus 37extern "C" { 38#endif 39 40struct directive; /* Deliberately incomplete. */ 41struct pending_option; 42struct op; 43struct _cpp_strbuf; 44 45typedef bool (*convert_f) (iconv_t, const unsigned char *, size_t, 46 struct _cpp_strbuf *); 47struct 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. */ 80struct 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. */ 99typedef struct _cpp_buff _cpp_buff; 100struct _cpp_buff 101{ 102 struct _cpp_buff *next; 103 unsigned char *base, *cur, *limit; 104}; 105 106extern _cpp_buff *_cpp_get_buff (cpp_reader *, size_t); 107extern void _cpp_release_buff (cpp_reader *, _cpp_buff *); 108extern void _cpp_extend_buff (cpp_reader *, _cpp_buff **, size_t); 109extern _cpp_buff *_cpp_append_extend_buff (cpp_reader *, _cpp_buff *, size_t); 110extern void _cpp_free_buff (_cpp_buff *); 111extern unsigned char *_cpp_aligned_alloc (cpp_reader *, size_t); 112extern 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. */ 119enum include_type {IT_INCLUDE, IT_INCLUDE_NEXT, IT_IMPORT, IT_CMDLINE}; 120 121union 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. */ 128typedef struct tokenrun tokenrun; 129struct 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 141typedef struct cpp_context cpp_context; 142struct 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 177struct lexer_state 178{ 179 /* Nonzero if first token on line is CPP_HASH. */ 180 unsigned char in_directive; 181 182 /* Nonzero if we are collecting macro arguments */ 183 unsigned char collecting_args; 184 185 /* Nonzero if in a directive that will handle padding tokens itself. 186 #include needs this to avoid problems with computed include and 187 spacing between tokens. */ 188 unsigned char directive_wants_padding; 189 190 /* True if we are skipping a failed conditional group. */ 191 unsigned char skipping; 192 193 /* Nonzero if in a directive that takes angle-bracketed headers. */ 194 unsigned char angled_headers; 195 196 /* Nonzero if in a #if or #elif directive. */ 197 unsigned char in_expression; 198 199 /* Nonzero to save comments. Turned off if discard_comments, and in 200 all directives apart from #define. */ 201 unsigned char save_comments; 202 203 /* Nonzero if lexing __VA_ARGS__ is valid. */ 204 unsigned char va_args_ok; 205 206 /* Nonzero if lexing poisoned identifiers is valid. */ 207 unsigned char poisoned_ok; 208 209 /* Nonzero to prevent macro expansion. */ 210 unsigned char prevent_expansion; 211 212 /* Nonzero when parsing arguments to a function-like macro. */ 213 unsigned char parsing_args; 214 215 /* Nonzero if prevent_expansion is true only because output is 216 being discarded. */ 217 unsigned char discarding_output; 218 219 /* Nonzero to skip evaluating part of an expression. */ 220 unsigned int skip_eval; 221 222 /* Nonzero when handling a deferred pragma. */ 223 unsigned char in_deferred_pragma; 224 225 /* Nonzero if the deferred pragma being handled allows macro expansion. */ 226 unsigned char pragma_allow_expansion; 227}; 228 229/* Special nodes - identifiers with predefined significance. */ 230struct spec_nodes 231{ 232 cpp_hashnode *n_defined; /* defined operator */ 233 cpp_hashnode *n_true; /* C++ keyword true */ 234 cpp_hashnode *n_false; /* C++ keyword false */ 235 cpp_hashnode *n__VA_ARGS__; /* C99 vararg macros */ 236}; 237 238typedef struct _cpp_line_note _cpp_line_note; 239struct _cpp_line_note 240{ 241 /* Location in the clean line the note refers to. */ 242 const unsigned char *pos; 243 244 /* Type of note. The 9 'from' trigraph characters represent those 245 trigraphs, '\\' an escaped newline, ' ' an escaped newline with 246 intervening space, 0 represents a note that has already been handled, 247 and anything else is invalid. */ 248 unsigned int type; 249}; 250 251/* Represents the contents of a file cpplib has read in. */ 252struct cpp_buffer 253{ 254 const unsigned char *cur; /* Current location. */ 255 const unsigned char *line_base; /* Start of current physical line. */ 256 const unsigned char *next_line; /* Start of to-be-cleaned logical line. */ 257 258 const unsigned char *buf; /* Entire character buffer. */ 259 const unsigned char *rlimit; /* Writable byte at end of file. */ 260 261 _cpp_line_note *notes; /* Array of notes. */ 262 unsigned int cur_note; /* Next note to process. */ 263 unsigned int notes_used; /* Number of notes. */ 264 unsigned int notes_cap; /* Size of allocated array. */ 265 266 struct cpp_buffer *prev; 267 268 /* Pointer into the file table; non-NULL if this is a file buffer. 269 Used for include_next and to record control macros. */ 270 struct _cpp_file *file; 271 272 /* Saved value of __TIMESTAMP__ macro - date and time of last modification 273 of the assotiated file. */ 274 const unsigned char *timestamp; 275 276 /* Value of if_stack at start of this file. 277 Used to prohibit unmatched #endif (etc) in an include file. */ 278 struct if_stack *if_stack; 279 280 /* True if we need to get the next clean line. */ 281 bool need_line; 282 283 /* True if we have already warned about C++ comments in this file. 284 The warning happens only for C89 extended mode with -pedantic on, 285 or for -Wtraditional, and only once per file (otherwise it would 286 be far too noisy). */ 287 unsigned int warned_cplusplus_comments : 1; 288 289 /* True if we don't process trigraphs and escaped newlines. True 290 for preprocessed input, command line directives, and _Pragma 291 buffers. */ 292 unsigned int from_stage3 : 1; 293 294 /* At EOF, a buffer is automatically popped. If RETURN_AT_EOF is 295 true, a CPP_EOF token is then returned. Otherwise, the next 296 token from the enclosing buffer is returned. */ 297 unsigned int return_at_eof : 1; 298 299 /* One for a system header, two for a C system header file that therefore 300 needs to be extern "C" protected in C++, and zero otherwise. */ 301 unsigned char sysp; 302 303 /* The directory of the this buffer's file. Its NAME member is not 304 allocated, so we don't need to worry about freeing it. */ 305 struct cpp_dir dir; 306 307 /* Descriptor for converting from the input character set to the 308 source character set. */ 309 struct cset_converter input_cset_desc; 310}; 311 312/* The list of saved macros by push_macro pragma. */ 313struct def_pragma_macro { 314 /* Chain element to previous saved macro. */ 315 struct def_pragma_macro *next; 316 /* Name of the macro. */ 317 char *name; 318 /* The stored macro content. */ 319 cpp_macro *value; 320}; 321 322/* A cpp_reader encapsulates the "state" of a pre-processor run. 323 Applying cpp_get_token repeatedly yields a stream of pre-processor 324 tokens. Usually, there is only one cpp_reader object active. */ 325struct cpp_reader 326{ 327 /* Top of buffer stack. */ 328 cpp_buffer *buffer; 329 330 /* Overlaid buffer (can be different after processing #include). */ 331 cpp_buffer *overlaid_buffer; 332 333 /* Lexer state. */ 334 struct lexer_state state; 335 336 /* Source line tracking. */ 337 struct line_maps *line_table; 338 339 /* The line of the '#' of the current directive. */ 340 source_location directive_line; 341 342 /* Memory buffers. */ 343 _cpp_buff *a_buff; /* Aligned permanent storage. */ 344 _cpp_buff *u_buff; /* Unaligned permanent storage. */ 345 _cpp_buff *free_buffs; /* Free buffer chain. */ 346 347 /* Context stack. */ 348 struct cpp_context base_context; 349 struct cpp_context *context; 350 351 /* If in_directive, the directive if known. */ 352 const struct directive *directive; 353 354 /* Token generated while handling a directive, if any. */ 355 cpp_token directive_result; 356 357 /* When expanding a macro at top-level, this is the location of the 358 macro invocation. */ 359 source_location invocation_location; 360 361 /* True if this call to cpp_get_token should consider setting 362 invocation_location. */ 363 bool set_invocation_location; 364 365 /* Search paths for include files. */ 366 struct cpp_dir *quote_include; /* "" */ 367 struct cpp_dir *bracket_include; /* <> */ 368 struct cpp_dir no_search_path; /* No path. */ 369 370 /* Chain of all hashed _cpp_file instances. */ 371 struct _cpp_file *all_files; 372 373 struct _cpp_file *main_file; 374 375 /* File and directory hash table. */ 376 struct htab *file_hash; 377 struct htab *dir_hash; 378 struct file_hash_entry_pool *file_hash_entries; 379 380 /* Negative path lookup hash table. */ 381 struct htab *nonexistent_file_hash; 382 struct obstack nonexistent_file_ob; 383 384 /* Nonzero means don't look for #include "foo" the source-file 385 directory. */ 386 bool quote_ignores_source_dir; 387 388 /* Nonzero if any file has contained #pragma once or #import has 389 been used. */ 390 bool seen_once_only; 391 392 /* Multiple include optimization. */ 393 const cpp_hashnode *mi_cmacro; 394 const cpp_hashnode *mi_ind_cmacro; 395 bool mi_valid; 396 397 /* Lexing. */ 398 cpp_token *cur_token; 399 tokenrun base_run, *cur_run; 400 unsigned int lookaheads; 401 402 /* Nonzero prevents the lexer from re-using the token runs. */ 403 unsigned int keep_tokens; 404 405 /* Buffer to hold macro definition string. */ 406 unsigned char *macro_buffer; 407 unsigned int macro_buffer_len; 408 409 /* Descriptor for converting from the source character set to the 410 execution character set. */ 411 struct cset_converter narrow_cset_desc; 412 413 /* Descriptor for converting from the source character set to the 414 UTF-8 execution character set. */ 415 struct cset_converter utf8_cset_desc; 416 417 /* Descriptor for converting from the source character set to the 418 UTF-16 execution character set. */ 419 struct cset_converter char16_cset_desc; 420 421 /* Descriptor for converting from the source character set to the 422 UTF-32 execution character set. */ 423 struct cset_converter char32_cset_desc; 424 425 /* Descriptor for converting from the source character set to the 426 wide execution character set. */ 427 struct cset_converter wide_cset_desc; 428 429 /* Date and time text. Calculated together if either is requested. */ 430 const unsigned char *date; 431 const unsigned char *time; 432 433 /* EOF token, and a token forcing paste avoidance. */ 434 cpp_token avoid_paste; 435 cpp_token eof; 436 437 /* Opaque handle to the dependencies of mkdeps.c. */ 438 struct deps *deps; 439 440 /* Obstack holding all macro hash nodes. This never shrinks. 441 See identifiers.c */ 442 struct obstack hash_ob; 443 444 /* Obstack holding buffer and conditional structures. This is a 445 real stack. See directives.c. */ 446 struct obstack buffer_ob; 447 448 /* Pragma table - dynamic, because a library user can add to the 449 list of recognized pragmas. */ 450 struct pragma_entry *pragmas; 451 452 /* Call backs to cpplib client. */ 453 struct cpp_callbacks cb; 454 455 /* Identifier hash table. */ 456 struct ht *hash_table; 457 458 /* Expression parser stack. */ 459 struct op *op_stack, *op_limit; 460 461 /* User visible options. */ 462 struct cpp_options opts; 463 464 /* Special nodes - identifiers with predefined significance to the 465 preprocessor. */ 466 struct spec_nodes spec_nodes; 467 468 /* Whether cpplib owns the hashtable. */ 469 bool our_hashtable; 470 471 /* Traditional preprocessing output buffer (a logical line). */ 472 struct 473 { 474 unsigned char *base; 475 unsigned char *limit; 476 unsigned char *cur; 477 source_location first_line; 478 } out; 479 480 /* Used for buffer overlays by traditional.c. */ 481 const unsigned char *saved_cur, *saved_rlimit, *saved_line_base; 482 483 /* A saved list of the defined macros, for dependency checking 484 of precompiled headers. */ 485 struct cpp_savedstate *savedstate; 486 487 /* Next value of __COUNTER__ macro. */ 488 unsigned int counter; 489 490 /* Table of comments, when state.save_comments is true. */ 491 cpp_comment_table comments; 492 493 /* List of saved macros by push_macro. */ 494 struct def_pragma_macro *pushed_macros; 495}; 496 497/* Character classes. Based on the more primitive macros in safe-ctype.h. 498 If the definition of `numchar' looks odd to you, please look up the 499 definition of a pp-number in the C standard [section 6.4.8 of C99]. 500 501 In the unlikely event that characters other than \r and \n enter 502 the set is_vspace, the macro handle_newline() in lex.c must be 503 updated. */ 504#define _dollar_ok(x) ((x) == '$' && CPP_OPTION (pfile, dollars_in_ident)) 505 506#define is_idchar(x) (ISIDNUM(x) || _dollar_ok(x)) 507#define is_numchar(x) ISIDNUM(x) 508#define is_idstart(x) (ISIDST(x) || _dollar_ok(x)) 509#define is_numstart(x) ISDIGIT(x) 510#define is_hspace(x) ISBLANK(x) 511#define is_vspace(x) IS_VSPACE(x) 512#define is_nvspace(x) IS_NVSPACE(x) 513#define is_space(x) IS_SPACE_OR_NUL(x) 514 515/* This table is constant if it can be initialized at compile time, 516 which is the case if cpp was compiled with GCC >=2.7, or another 517 compiler that supports C99. */ 518#if HAVE_DESIGNATED_INITIALIZERS 519extern const unsigned char _cpp_trigraph_map[UCHAR_MAX + 1]; 520#else 521extern unsigned char _cpp_trigraph_map[UCHAR_MAX + 1]; 522#endif 523 524/* Macros. */ 525 526static inline int cpp_in_system_header (cpp_reader *); 527static inline int 528cpp_in_system_header (cpp_reader *pfile) 529{ 530 return pfile->buffer ? pfile->buffer->sysp : 0; 531} 532#define CPP_PEDANTIC(PF) CPP_OPTION (PF, pedantic) 533#define CPP_WTRADITIONAL(PF) CPP_OPTION (PF, warn_traditional) 534 535static inline int cpp_in_primary_file (cpp_reader *); 536static inline int 537cpp_in_primary_file (cpp_reader *pfile) 538{ 539 return pfile->line_table->depth == 1; 540} 541 542/* In macro.c */ 543extern void _cpp_free_definition (cpp_hashnode *); 544extern bool _cpp_create_definition (cpp_reader *, cpp_hashnode *); 545extern void _cpp_pop_context (cpp_reader *); 546extern void _cpp_push_text_context (cpp_reader *, cpp_hashnode *, 547 const unsigned char *, size_t); 548extern bool _cpp_save_parameter (cpp_reader *, cpp_macro *, cpp_hashnode *); 549extern bool _cpp_arguments_ok (cpp_reader *, cpp_macro *, const cpp_hashnode *, 550 unsigned int); 551extern const unsigned char *_cpp_builtin_macro_text (cpp_reader *, 552 cpp_hashnode *); 553extern int _cpp_warn_if_unused_macro (cpp_reader *, cpp_hashnode *, void *); 554extern void _cpp_push_token_context (cpp_reader *, cpp_hashnode *, 555 const cpp_token *, unsigned int); 556extern void _cpp_backup_tokens_direct (cpp_reader *, unsigned int); 557 558/* In identifiers.c */ 559extern void _cpp_init_hashtable (cpp_reader *, hash_table *); 560extern void _cpp_destroy_hashtable (cpp_reader *); 561 562/* In files.c */ 563typedef struct _cpp_file _cpp_file; 564extern _cpp_file *_cpp_find_file (cpp_reader *, const char *, cpp_dir *, 565 bool, int); 566extern bool _cpp_find_failed (_cpp_file *); 567extern void _cpp_mark_file_once_only (cpp_reader *, struct _cpp_file *); 568extern void _cpp_fake_include (cpp_reader *, const char *); 569extern bool _cpp_stack_file (cpp_reader *, _cpp_file*, bool); 570extern bool _cpp_stack_include (cpp_reader *, const char *, int, 571 enum include_type); 572extern int _cpp_compare_file_date (cpp_reader *, const char *, int); 573extern void _cpp_report_missing_guards (cpp_reader *); 574extern void _cpp_init_files (cpp_reader *); 575extern void _cpp_cleanup_files (cpp_reader *); 576extern void _cpp_pop_file_buffer (cpp_reader *, struct _cpp_file *); 577extern bool _cpp_save_file_entries (cpp_reader *pfile, FILE *f); 578extern bool _cpp_read_file_entries (cpp_reader *, FILE *); 579extern struct stat *_cpp_get_file_stat (_cpp_file *); 580 581/* In expr.c */ 582extern bool _cpp_parse_expr (cpp_reader *, bool); 583extern struct op *_cpp_expand_op_stack (cpp_reader *); 584 585/* In lex.c */ 586extern void _cpp_process_line_notes (cpp_reader *, int); 587extern void _cpp_clean_line (cpp_reader *); 588extern bool _cpp_get_fresh_line (cpp_reader *); 589extern bool _cpp_skip_block_comment (cpp_reader *); 590extern cpp_token *_cpp_temp_token (cpp_reader *); 591extern const cpp_token *_cpp_lex_token (cpp_reader *); 592extern cpp_token *_cpp_lex_direct (cpp_reader *); 593extern int _cpp_equiv_tokens (const cpp_token *, const cpp_token *); 594extern void _cpp_init_tokenrun (tokenrun *, unsigned int); 595extern cpp_hashnode *_cpp_lex_identifier (cpp_reader *, const char *); 596 597/* In init.c. */ 598extern void _cpp_maybe_push_include_file (cpp_reader *); 599extern const char *cpp_named_operator2name (enum cpp_ttype type); 600 601/* In directives.c */ 602extern int _cpp_test_assertion (cpp_reader *, unsigned int *); 603extern int _cpp_handle_directive (cpp_reader *, int); 604extern void _cpp_define_builtin (cpp_reader *, const char *); 605extern char ** _cpp_save_pragma_names (cpp_reader *); 606extern void _cpp_restore_pragma_names (cpp_reader *, char **); 607extern int _cpp_do__Pragma (cpp_reader *); 608extern void _cpp_init_directives (cpp_reader *); 609extern void _cpp_init_internal_pragmas (cpp_reader *); 610extern void _cpp_do_file_change (cpp_reader *, enum lc_reason, const char *, 611 linenum_type, unsigned int); 612extern void _cpp_pop_buffer (cpp_reader *); 613 614/* In directives.c */ 615struct _cpp_dir_only_callbacks 616{ 617 /* Called to print a block of lines. */ 618 void (*print_lines) (int, const void *, size_t); 619 void (*maybe_print_line) (source_location); 620}; 621 622extern void _cpp_preprocess_dir_only (cpp_reader *, 623 const struct _cpp_dir_only_callbacks *); 624 625/* In traditional.c. */ 626extern bool _cpp_scan_out_logical_line (cpp_reader *, cpp_macro *); 627extern bool _cpp_read_logical_line_trad (cpp_reader *); 628extern void _cpp_overlay_buffer (cpp_reader *pfile, const unsigned char *, 629 size_t); 630extern void _cpp_remove_overlay (cpp_reader *); 631extern bool _cpp_create_trad_definition (cpp_reader *, cpp_macro *); 632extern bool _cpp_expansions_different_trad (const cpp_macro *, 633 const cpp_macro *); 634extern unsigned char *_cpp_copy_replacement_text (const cpp_macro *, 635 unsigned char *); 636extern size_t _cpp_replacement_text_len (const cpp_macro *); 637 638/* In charset.c. */ 639 640/* The normalization state at this point in the sequence. 641 It starts initialized to all zeros, and at the end 642 'level' is the normalization level of the sequence. */ 643 644struct normalize_state 645{ 646 /* The previous character. */ 647 cppchar_t previous; 648 /* The combining class of the previous character. */ 649 unsigned char prev_class; 650 /* The lowest normalization level so far. */ 651 enum cpp_normalize_level level; 652}; 653#define INITIAL_NORMALIZE_STATE { 0, 0, normalized_KC } 654#define NORMALIZE_STATE_RESULT(st) ((st)->level) 655 656/* We saw a character that matches ISIDNUM(), update a 657 normalize_state appropriately. */ 658#define NORMALIZE_STATE_UPDATE_IDNUM(st) \ 659 ((st)->previous = 0, (st)->prev_class = 0) 660 661extern cppchar_t _cpp_valid_ucn (cpp_reader *, const unsigned char **, 662 const unsigned char *, int, 663 struct normalize_state *state); 664extern void _cpp_destroy_iconv (cpp_reader *); 665extern unsigned char *_cpp_convert_input (cpp_reader *, const char *, 666 unsigned char *, size_t, size_t, 667 const unsigned char **, off_t *); 668extern const char *_cpp_default_encoding (void); 669extern cpp_hashnode * _cpp_interpret_identifier (cpp_reader *pfile, 670 const unsigned char *id, 671 size_t len); 672 673/* Utility routines and macros. */ 674#define DSC(str) (const unsigned char *)str, sizeof str - 1 675 676/* These are inline functions instead of macros so we can get type 677 checking. */ 678static inline int ustrcmp (const unsigned char *, const unsigned char *); 679static inline int ustrncmp (const unsigned char *, const unsigned char *, 680 size_t); 681static inline size_t ustrlen (const unsigned char *); 682static inline unsigned char *uxstrdup (const unsigned char *); 683static inline unsigned char *ustrchr (const unsigned char *, int); 684static inline int ufputs (const unsigned char *, FILE *); 685 686/* Use a const char for the second parameter since it is usually a literal. */ 687static inline int ustrcspn (const unsigned char *, const char *); 688 689static inline int 690ustrcmp (const unsigned char *s1, const unsigned char *s2) 691{ 692 return strcmp ((const char *)s1, (const char *)s2); 693} 694 695static inline int 696ustrncmp (const unsigned char *s1, const unsigned char *s2, size_t n) 697{ 698 return strncmp ((const char *)s1, (const char *)s2, n); 699} 700 701static inline int 702ustrcspn (const unsigned char *s1, const char *s2) 703{ 704 return strcspn ((const char *)s1, s2); 705} 706 707static inline size_t 708ustrlen (const unsigned char *s1) 709{ 710 return strlen ((const char *)s1); 711} 712 713static inline unsigned char * 714uxstrdup (const unsigned char *s1) 715{ 716 return (unsigned char *) xstrdup ((const char *)s1); 717} 718 719static inline unsigned char * 720ustrchr (const unsigned char *s1, int c) 721{ 722 return (unsigned char *) strchr ((const char *)s1, c); 723} 724 725static inline int 726ufputs (const unsigned char *s, FILE *f) 727{ 728 return fputs ((const char *)s, f); 729} 730 731#ifdef __cplusplus 732} 733#endif 734 735#endif /* ! LIBCPP_INTERNAL_H */ 736