target.def (pragma_parse): Use DEFHOOK.
[gcc.git] / libcpp / internal.h
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 */