1 /* Part of CPP library.
2 Copyright (C) 1997, 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
4 This program is free software; you can redistribute it and/or modify it
5 under the terms of the GNU General Public License as published by the
6 Free Software Foundation; either version 2, or (at your option) any
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
18 /* This header defines all the internal data structures and functions
19 that need to be visible across files. It's called cpphash.h for
20 historical reasons. */
22 #ifndef __GCC_CPPHASH__
23 #define __GCC_CPPHASH__
25 struct directive; /* These are deliberately incomplete. */
28 /* Test if a sign is valid within a preprocessing number. */
29 #define VALID_SIGN(c, prevc) \
30 (((c) == '+' || (c) == '-') && \
31 ((prevc) == 'e' || (prevc) == 'E' \
32 || (((prevc) == 'p' || (prevc) == 'P') \
33 && CPP_OPTION (pfile, extended_numbers))))
35 #define CPP_OPTION(PFILE, OPTION) ((PFILE)->opts.OPTION)
36 #define CPP_BUFFER(PFILE) ((PFILE)->buffer)
37 #define CPP_BUF_LINE(BUF) ((BUF)->lineno)
38 #define CPP_BUF_COLUMN(BUF, CUR) ((CUR) - (BUF)->line_base + (BUF)->col_adjust)
39 #define CPP_BUF_COL(BUF) CPP_BUF_COLUMN(BUF, (BUF)->cur)
41 /* Maximum nesting of cpp_buffers. We use a static limit, partly for
42 efficiency, and partly to limit runaway recursion. */
43 #define CPP_STACK_MAX 200
46 #define POOL_ALIGN(size, align) (((size) + ((align) - 1)) & ~((align) - 1))
47 #define POOL_FRONT(p) ((p)->cur->front)
48 #define POOL_LIMIT(p) ((p)->cur->limit)
49 #define POOL_BASE(p) ((p)->cur->base)
50 #define POOL_SIZE(p) ((p)->cur->limit - (p)->cur->base)
51 #define POOL_ROOM(p) ((p)->cur->limit - (p)->cur->front)
52 #define POOL_USED(p) ((p)->cur->front - (p)->cur->base)
53 #define POOL_COMMIT(p, len) do {\
54 ((p)->cur->front += POOL_ALIGN (len, (p)->align));\
55 if ((p)->cur->front > (p)->cur->limit) abort ();} while (0)
57 typedef struct cpp_chunk cpp_chunk;
66 typedef struct cpp_pool cpp_pool;
69 struct cpp_chunk *cur, *locked;
70 unsigned char *pos; /* Current position. */
75 /* List of directories to look for include files in. */
78 struct file_name_list *next;
79 struct file_name_list *alloc; /* for the cache of
80 current directory entries */
83 /* We use these to tell if the directory mentioned here is a duplicate
84 of an earlier directory on the search path. */
87 /* If the following is nonzero, it is a C-language system include
90 /* Mapping of file names for this directory.
91 Only used on MS-DOS and related platforms. */
92 struct file_name_map *name_map;
95 /* Multiple-include optimisation. */
96 enum mi_state {MI_FAILED = 0, MI_OUTSIDE};
97 enum mi_ind {MI_IND_NONE = 0, MI_IND_NOT};
99 typedef struct toklist toklist;
106 typedef struct cpp_context cpp_context;
109 /* Doubly-linked list. */
110 cpp_context *next, *prev;
112 /* Contexts other than the base context are contiguous tokens.
113 e.g. macro expansions, expanded argument tokens. */
116 /* For a macro context, these are the macro and its arguments. */
122 /* Nonzero if first token on line is CPP_HASH. */
123 unsigned char in_directive;
125 /* Nonzero if in a directive that takes angle-bracketed headers. */
126 unsigned char angled_headers;
128 /* Nonzero to save comments. Turned off if discard_comments, and in
129 all directives apart from #define. */
130 unsigned char save_comments;
132 /* If nonzero the next token is at the beginning of the line. */
133 unsigned char next_bol;
135 /* Nonzero if we're mid-comment. */
136 unsigned char lexing_comment;
138 /* Nonzero if lexing __VA_ARGS__ is valid. */
139 unsigned char va_args_ok;
141 /* Nonzero if lexing poisoned identifiers is valid. */
142 unsigned char poisoned_ok;
144 /* Nonzero to prevent macro expansion. */
145 unsigned char prevent_expansion;
147 /* Nonzero when parsing arguments to a function-like macro. */
148 unsigned char parsing_args;
150 /* Nonzero when in a # NUMBER directive. */
151 unsigned char line_extension;
154 /* Special nodes - identifiers with predefined significance. */
157 cpp_hashnode *n_L; /* L"str" */
158 cpp_hashnode *n_defined; /* defined operator */
159 cpp_hashnode *n__Pragma; /* _Pragma operator */
160 cpp_hashnode *n__STRICT_ANSI__; /* STDC_0_IN_SYSTEM_HEADERS */
161 cpp_hashnode *n__CHAR_UNSIGNED__; /* plain char is unsigned */
162 cpp_hashnode *n__VA_ARGS__; /* C99 vararg macros */
167 const unsigned char *cur; /* current position */
168 const unsigned char *rlimit; /* end of valid data */
169 const unsigned char *line_base; /* start of current line */
170 cppchar_t read_ahead; /* read ahead character */
171 cppchar_t extra_char; /* extra read-ahead for long tokens. */
173 struct cpp_reader *pfile; /* Owns this buffer. */
174 struct cpp_buffer *prev;
176 const unsigned char *buf; /* entire buffer */
178 /* Filename specified with #line command. */
179 const char *nominal_fname;
181 /* Actual directory of this file, used only for "" includes */
182 struct file_name_list *actual_dir;
184 /* Pointer into the include table. Used for include_next and
185 to record control macros. */
186 struct include_file *inc;
188 /* Value of if_stack at start of this file.
189 Used to prohibit unmatched #endif (etc) in an include file. */
190 struct if_stack *if_stack;
192 /* Token column position adjustment owing to tabs in whitespace. */
193 unsigned int col_adjust;
195 /* Line number at line_base (above). */
198 /* Contains PREV_WHITE and/or AVOID_LPASTE. */
199 unsigned char saved_flags;
201 /* Because of the way the lexer works, -Wtrigraphs can sometimes
202 warn twice for the same trigraph. This helps prevent that. */
203 const unsigned char *last_Wtrigraphs;
205 /* True if we have already warned about C++ comments in this file.
206 The warning happens only for C89 extended mode with -pedantic on,
207 or for -Wtraditional, and only once per file (otherwise it would
208 be far too noisy). */
209 unsigned char warned_cplusplus_comments;
211 /* True if we don't process trigraphs and escaped newlines. True
212 for preprocessed input, command line directives, and _Pragma
214 unsigned char from_stage3;
216 /* Temporary storage for pfile->skipping whilst in a directive. */
217 unsigned char was_skipping;
219 /* 1 = system header file, 2 = C system header file used for C++. */
222 /* Nonzero means we have printed (while error reporting) a list of
223 containing files that matches the current status. */
224 unsigned char include_stack_listed;
227 ENUM_BITFIELD (cpp_buffer_type) type : 8;
230 /* A cpp_reader encapsulates the "state" of a pre-processor run.
231 Applying cpp_get_token repeatedly yields a stream of pre-processor
232 tokens. Usually, there is only one cpp_reader object active. */
236 /* Top of buffer stack. */
240 struct lexer_state state;
242 /* The position of the last lexed token and last lexed directive. */
243 cpp_lexer_pos lexer_pos;
244 cpp_lexer_pos directive_pos;
247 cpp_pool ident_pool; /* For all identifiers, and permanent
248 numbers and strings. */
249 cpp_pool macro_pool; /* For macro definitions. Permanent. */
250 cpp_pool argument_pool; /* For macro arguments. Temporary. */
253 struct cpp_context base_context;
254 struct cpp_context *context;
256 /* If in_directive, the directive if known. */
257 const struct directive *directive;
259 /* Multiple inlcude optimisation. */
260 enum mi_state mi_state;
261 enum mi_ind mi_if_not_defined;
262 unsigned int mi_lexed;
263 const cpp_hashnode *mi_cmacro;
264 const cpp_hashnode *mi_ind_cmacro;
266 /* Token lookahead. */
267 struct cpp_lookahead *la_read; /* Read from this lookahead. */
268 struct cpp_lookahead *la_write; /* Write to this lookahead. */
269 struct cpp_lookahead *la_unused; /* Free store. */
270 struct cpp_lookahead *la_saved; /* Backup when entering directive. */
272 /* Error counter for exit code. */
275 /* Line and column where a newline was first seen in a string
276 constant (multi-line strings). */
277 cpp_lexer_pos mlstring_pos;
279 /* Buffer to hold macro definition string. */
280 unsigned char *macro_buffer;
281 unsigned int macro_buffer_len;
283 /* Current depth in #include directives that use <...>. */
284 unsigned int system_include_depth;
286 /* Current depth of buffer stack. */
287 unsigned int buffer_stack_depth;
289 /* Current depth in #include directives. */
290 unsigned int include_depth;
292 /* Hash table of macros and assertions. See cpphash.c. */
293 struct htab *hashtab;
295 /* Tree of other included files. See cppfiles.c. */
296 struct splay_tree_s *all_include_files;
298 /* Chain of `actual directory' file_name_list entries, for ""
300 struct file_name_list *actual_dirs;
302 /* Current maximum length of directory names in the search path
303 for include files. (Altered as we get more of them.) */
304 unsigned int max_include_len;
306 /* Date and time tokens. Calculated together if either is requested. */
310 /* Opaque handle to the dependencies of mkdeps.c. Used by -M etc. */
313 /* Obstack holding all macro hash nodes. This never shrinks.
315 struct obstack *hash_ob;
317 /* Obstack holding buffer and conditional structures. This is a
318 real stack. See cpplib.c */
319 struct obstack *buffer_ob;
321 /* Pragma table - dynamic, because a library user can add to the
322 list of recognized pragmas. */
323 struct pragma_entry *pragmas;
326 struct cpp_callbacks cb;
328 /* User visible options. */
329 struct cpp_options opts;
331 /* Special nodes - identifiers with predefined significance to the
333 struct spec_nodes spec_nodes;
335 /* We're printed a warning recommending against using #import. */
336 unsigned char import_warning;
338 /* True after cpp_start_read completes. Used to inhibit some
339 warnings while parsing the command line. */
340 unsigned char done_initializing;
342 /* True if we are skipping a failed conditional group. */
343 unsigned char skipping;
346 /* Character classes. Based on the more primitive macros in safe-ctype.h.
347 If the definition of `numchar' looks odd to you, please look up the
348 definition of a pp-number in the C standard [section 6.4.8 of C99].
350 In the unlikely event that characters other than \r and \n enter
351 the set is_vspace, the macro handle_newline() in cpplex.c must be
353 #define _dollar_ok(x) ((x) == '$' && CPP_OPTION (pfile, dollars_in_ident))
355 #define is_idchar(x) (ISIDNUM(x) || _dollar_ok(x))
356 #define is_numchar(x) ISIDNUM(x)
357 #define is_idstart(x) (ISIDST(x) || _dollar_ok(x))
358 #define is_numstart(x) ISDIGIT(x)
359 #define is_hspace(x) ISBLANK(x)
360 #define is_vspace(x) IS_VSPACE(x)
361 #define is_nvspace(x) IS_NVSPACE(x)
362 #define is_space(x) IS_SPACE_OR_NUL(x)
364 /* This table is constant if it can be initialized at compile time,
365 which is the case if cpp was compiled with GCC >=2.7, or another
366 compiler that supports C99. */
367 #if HAVE_DESIGNATED_INITIALIZERS
368 extern const unsigned char _cpp_trigraph_map[UCHAR_MAX + 1];
370 extern unsigned char _cpp_trigraph_map[UCHAR_MAX + 1];
375 #define CPP_PREV_BUFFER(BUFFER) ((BUFFER)->prev)
376 #define CPP_PRINT_DEPS(PFILE) CPP_OPTION (PFILE, print_deps)
377 #define CPP_IN_SYSTEM_HEADER(PFILE) \
378 (CPP_BUFFER (PFILE) && CPP_BUFFER (PFILE)->sysp)
379 #define CPP_PEDANTIC(PF) CPP_OPTION (PF, pedantic)
380 #define CPP_WTRADITIONAL(PF) CPP_OPTION (PF, warn_traditional)
382 /* Hash step. The hash calculation is duplicated in cpp_lookup and
384 #define HASHSTEP(r, c) ((r) * 67 + (c - 113));
387 enum error_type { WARNING = 0, PEDWARN, ERROR, FATAL, ICE };
388 extern int _cpp_begin_message PARAMS ((cpp_reader *, enum error_type,
389 const char *, const cpp_lexer_pos *));
392 extern void _cpp_free_definition PARAMS ((cpp_hashnode *));
393 extern int _cpp_create_definition PARAMS ((cpp_reader *, cpp_hashnode *));
394 extern void _cpp_pop_context PARAMS ((cpp_reader *));
395 extern void _cpp_free_lookaheads PARAMS ((cpp_reader *));
396 extern void _cpp_release_lookahead PARAMS ((cpp_reader *));
397 extern void _cpp_push_token PARAMS ((cpp_reader *, const cpp_token *,
398 const cpp_lexer_pos *));
401 extern void _cpp_init_hashtable PARAMS ((cpp_reader *));
402 extern void _cpp_cleanup_hashtable PARAMS ((cpp_reader *));
403 extern cpp_hashnode *_cpp_lookup_with_hash PARAMS ((cpp_reader*, size_t,
407 extern void _cpp_fake_include PARAMS ((cpp_reader *, const char *));
408 extern void _cpp_never_reread PARAMS ((struct include_file *));
409 extern void _cpp_simplify_pathname PARAMS ((char *));
410 extern int _cpp_read_file PARAMS ((cpp_reader *, const char *));
411 extern void _cpp_execute_include PARAMS ((cpp_reader *,
412 const cpp_token *, int, int));
413 extern int _cpp_compare_file_date PARAMS ((cpp_reader *,
415 extern void _cpp_report_missing_guards PARAMS ((cpp_reader *));
416 extern void _cpp_init_includes PARAMS ((cpp_reader *));
417 extern void _cpp_cleanup_includes PARAMS ((cpp_reader *));
418 extern void _cpp_pop_file_buffer PARAMS ((cpp_reader *, cpp_buffer *));
421 extern int _cpp_parse_expr PARAMS ((cpp_reader *));
424 extern void _cpp_lex_token PARAMS ((cpp_reader *, cpp_token *));
425 extern int _cpp_equiv_tokens PARAMS ((const cpp_token *,
427 extern void _cpp_init_pool PARAMS ((cpp_pool *, unsigned int,
428 unsigned int, unsigned int));
429 extern void _cpp_free_pool PARAMS ((cpp_pool *));
430 extern unsigned char *_cpp_pool_reserve PARAMS ((cpp_pool *, unsigned int));
431 extern unsigned char *_cpp_pool_alloc PARAMS ((cpp_pool *, unsigned int));
432 extern unsigned char *_cpp_next_chunk PARAMS ((cpp_pool *, unsigned int,
434 extern void _cpp_lock_pool PARAMS ((cpp_pool *));
435 extern void _cpp_unlock_pool PARAMS ((cpp_pool *));
438 extern int _cpp_test_assertion PARAMS ((cpp_reader *, int *));
439 extern int _cpp_handle_directive PARAMS ((cpp_reader *, int));
440 extern void _cpp_define_builtin PARAMS ((cpp_reader *, const char *));
441 extern void _cpp_do__Pragma PARAMS ((cpp_reader *));
442 extern void _cpp_init_stacks PARAMS ((cpp_reader *));
443 extern void _cpp_cleanup_stacks PARAMS ((cpp_reader *));
444 extern void _cpp_init_internal_pragmas PARAMS ((cpp_reader *));
445 extern void _cpp_do_file_change PARAMS ((cpp_reader *, enum cpp_fc_reason,
446 const char *, unsigned int));
448 /* Utility routines and macros. */
449 #define DSC(str) (const U_CHAR *)str, sizeof str - 1
450 #define xnew(T) (T *) xmalloc (sizeof(T))
451 #define xcnew(T) (T *) xcalloc (1, sizeof(T))
452 #define xnewvec(T, N) (T *) xmalloc (sizeof(T) * (N))
453 #define xcnewvec(T, N) (T *) xcalloc (N, sizeof(T))
454 #define xobnew(O, T) (T *) obstack_alloc (O, sizeof(T))
456 /* These are inline functions instead of macros so we can get type
458 typedef unsigned char U_CHAR;
459 #define U (const U_CHAR *) /* Intended use: U"string" */
461 static inline int ustrcmp PARAMS ((const U_CHAR *, const U_CHAR *));
462 static inline int ustrncmp PARAMS ((const U_CHAR *, const U_CHAR *,
464 static inline size_t ustrlen PARAMS ((const U_CHAR *));
465 static inline U_CHAR *uxstrdup PARAMS ((const U_CHAR *));
466 static inline U_CHAR *ustrchr PARAMS ((const U_CHAR *, int));
467 static inline int ufputs PARAMS ((const U_CHAR *, FILE *));
471 const U_CHAR *s1, *s2;
473 return strcmp ((const char *)s1, (const char *)s2);
478 const U_CHAR *s1, *s2;
481 return strncmp ((const char *)s1, (const char *)s2, n);
488 return strlen ((const char *)s1);
491 static inline U_CHAR *
495 return (U_CHAR *) xstrdup ((const char *)s1);
498 static inline U_CHAR *
503 return (U_CHAR *) strchr ((const char *)s1, c);
511 return fputs ((const char *)s, f);