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[/] [openrisc/] [trunk/] [gnu-stable/] [gcc-4.5.1/] [libcpp/] [internal.h] - Blame information for rev 270

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1 270 jeremybenn
/* 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 */

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