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. */
25 #include "hashtable.h"
27 struct directive; /* Deliberately incomplete. */
29 /* Test if a sign is valid within a preprocessing number. */
30 #define VALID_SIGN(c, prevc) \
31 (((c) == '+' || (c) == '-') && \
32 ((prevc) == 'e' || (prevc) == 'E' \
33 || (((prevc) == 'p' || (prevc) == 'P') \
34 && CPP_OPTION (pfile, extended_numbers))))
36 #define CPP_OPTION(PFILE, OPTION) ((PFILE)->opts.OPTION)
37 #define CPP_BUFFER(PFILE) ((PFILE)->buffer)
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, *first;
70 unsigned char *pos; /* Current position. */
74 /* A generic memory buffer. */
76 typedef struct _cpp_buff _cpp_buff;
79 struct _cpp_buff *next;
80 unsigned char *base, *cur, *limit;
83 extern _cpp_buff *_cpp_get_buff PARAMS ((cpp_reader *, size_t));
84 extern void _cpp_release_buff PARAMS ((cpp_reader *, _cpp_buff *));
85 extern _cpp_buff *_cpp_extend_buff PARAMS ((cpp_reader *, _cpp_buff *,
87 extern void _cpp_free_buff PARAMS ((_cpp_buff *));
88 extern unsigned char *_cpp_unaligned_alloc PARAMS ((cpp_reader *, size_t));
89 #define BUFF_ROOM(BUFF) ((BUFF)->limit - (BUFF)->cur)
90 #define BUFF_FRONT(BUFF) ((BUFF)->cur)
91 #define BUFF_LIMIT(BUFF) ((BUFF)->limit)
93 /* List of directories to look for include files in. */
96 struct search_path *next;
98 /* NOTE: NAME may not be null terminated for the case of the current
102 /* We use these to tell if the directory mentioned here is a duplicate
103 of an earlier directory on the search path. */
106 /* Non-zero if it is a system include directory. */
108 /* Mapping of file names for this directory. Only used on MS-DOS
109 and related platforms. */
110 struct file_name_map *name_map;
113 /* #include types. */
114 enum include_type {IT_INCLUDE, IT_INCLUDE_NEXT, IT_IMPORT, IT_CMDLINE};
118 const cpp_token *token;
119 const cpp_token **ptoken;
122 typedef struct tokenrun tokenrun;
125 tokenrun *next, *prev;
126 cpp_token *base, *limit;
129 typedef struct cpp_context cpp_context;
132 /* Doubly-linked list. */
133 cpp_context *next, *prev;
135 /* Contexts other than the base context are contiguous tokens.
136 e.g. macro expansions, expanded argument tokens. */
140 /* If non-NULL, a buffer used for storage related to this context.
141 When the context is popped, the buffer is released. */
144 /* For a macro context, these are the macro and its arguments. */
147 /* True if utoken element is token, else ptoken. */
153 /* Nonzero if first token on line is CPP_HASH. */
154 unsigned char in_directive;
156 /* True if we are skipping a failed conditional group. */
157 unsigned char skipping;
159 /* Nonzero if in a directive that takes angle-bracketed headers. */
160 unsigned char angled_headers;
162 /* Nonzero to save comments. Turned off if discard_comments, and in
163 all directives apart from #define. */
164 unsigned char save_comments;
166 /* Nonzero if we're mid-comment. */
167 unsigned char lexing_comment;
169 /* Nonzero if lexing __VA_ARGS__ is valid. */
170 unsigned char va_args_ok;
172 /* Nonzero if lexing poisoned identifiers is valid. */
173 unsigned char poisoned_ok;
175 /* Nonzero to prevent macro expansion. */
176 unsigned char prevent_expansion;
178 /* Nonzero when parsing arguments to a function-like macro. */
179 unsigned char parsing_args;
181 /* Nonzero when in a # NUMBER directive. */
182 unsigned char line_extension;
185 /* Special nodes - identifiers with predefined significance. */
188 cpp_hashnode *n_L; /* L"str" */
189 cpp_hashnode *n_defined; /* defined operator */
190 cpp_hashnode *n_true; /* C++ keyword true */
191 cpp_hashnode *n_false; /* C++ keyword false */
192 cpp_hashnode *n__Pragma; /* _Pragma operator */
193 cpp_hashnode *n__STRICT_ANSI__; /* STDC_0_IN_SYSTEM_HEADERS */
194 cpp_hashnode *n__CHAR_UNSIGNED__; /* plain char is unsigned */
195 cpp_hashnode *n__VA_ARGS__; /* C99 vararg macros */
200 const unsigned char *cur; /* current position */
201 const unsigned char *rlimit; /* end of valid data */
202 const unsigned char *line_base; /* start of current line */
203 cppchar_t read_ahead; /* read ahead character */
204 cppchar_t extra_char; /* extra read-ahead for long tokens. */
206 struct cpp_buffer *prev;
208 const unsigned char *buf; /* Entire buffer. */
210 /* Pointer into the include table; non-NULL if this is a file
211 buffer. Used for include_next and to record control macros. */
212 struct include_file *inc;
214 /* Value of if_stack at start of this file.
215 Used to prohibit unmatched #endif (etc) in an include file. */
216 struct if_stack *if_stack;
218 /* Token column position adjustment owing to tabs in whitespace. */
219 unsigned int col_adjust;
221 /* Contains PREV_WHITE and/or AVOID_LPASTE. */
222 unsigned char saved_flags;
224 /* Because of the way the lexer works, -Wtrigraphs can sometimes
225 warn twice for the same trigraph. This helps prevent that. */
226 const unsigned char *last_Wtrigraphs;
228 /* True if we have already warned about C++ comments in this file.
229 The warning happens only for C89 extended mode with -pedantic on,
230 or for -Wtraditional, and only once per file (otherwise it would
231 be far too noisy). */
232 unsigned char warned_cplusplus_comments;
234 /* True if we don't process trigraphs and escaped newlines. True
235 for preprocessed input, command line directives, and _Pragma
237 unsigned char from_stage3;
239 /* Nonzero means that the directory to start searching for ""
240 include files has been calculated and stored in "dir" below. */
241 unsigned char search_cached;
243 /* At EOF, a buffer is automatically popped. If RETURN_AT_EOF is
244 true, a CPP_EOF token is then returned. Otherwise, the next
245 token from the enclosing buffer is returned. */
248 /* The directory of the this buffer's file. Its NAME member is not
249 allocated, so we don't need to worry about freeing it. */
250 struct search_path dir;
253 /* A cpp_reader encapsulates the "state" of a pre-processor run.
254 Applying cpp_get_token repeatedly yields a stream of pre-processor
255 tokens. Usually, there is only one cpp_reader object active. */
259 /* Top of buffer stack. */
263 struct lexer_state state;
265 /* Source line tracking. */
266 struct line_maps line_maps;
267 const struct line_map *map;
270 /* The line of the '#' of the current directive. */
271 unsigned int directive_line;
274 cpp_pool macro_pool; /* For macro definitions. Permanent. */
276 /* Memory buffers. */
277 _cpp_buff *u_buff; /* Unaligned permanent storage. */
278 _cpp_buff *free_buffs; /* Free buffer chain. */
281 struct cpp_context base_context;
282 struct cpp_context *context;
284 /* If in_directive, the directive if known. */
285 const struct directive *directive;
287 /* Multiple inlcude optimisation. */
288 const cpp_hashnode *mi_cmacro;
289 const cpp_hashnode *mi_ind_cmacro;
293 cpp_token *cur_token;
294 tokenrun base_run, *cur_run;
295 unsigned int lookaheads;
297 /* Non-zero prevents the lexer from re-using the token runs. */
298 unsigned int keep_tokens;
300 /* Error counter for exit code. */
303 /* Line and column where a newline was first seen in a string
304 constant (multi-line strings). */
305 unsigned int mls_line;
306 unsigned int mls_col;
308 /* Buffer to hold macro definition string. */
309 unsigned char *macro_buffer;
310 unsigned int macro_buffer_len;
312 /* Tree of other included files. See cppfiles.c. */
313 struct splay_tree_s *all_include_files;
315 /* Current maximum length of directory names in the search path
316 for include files. (Altered as we get more of them.) */
317 unsigned int max_include_len;
319 /* Date and time tokens. Calculated together if either is requested. */
323 /* EOF token, and a token forcing paste avoidance. */
324 cpp_token avoid_paste;
327 /* Opaque handle to the dependencies of mkdeps.c. Used by -M etc. */
330 /* Obstack holding all macro hash nodes. This never shrinks.
332 struct obstack hash_ob;
334 /* Obstack holding buffer and conditional structures. This is a
335 real stack. See cpplib.c. */
336 struct obstack buffer_ob;
338 /* Pragma table - dynamic, because a library user can add to the
339 list of recognized pragmas. */
340 struct pragma_entry *pragmas;
343 struct cpp_callbacks cb;
345 /* Identifier hash table. */
346 struct ht *hash_table;
348 /* User visible options. */
349 struct cpp_options opts;
351 /* Special nodes - identifiers with predefined significance to the
353 struct spec_nodes spec_nodes;
355 /* Whether to print our version number. Done this way so
356 we don't get it twice for -v -version. */
357 unsigned char print_version;
359 /* Whether cpplib owns the hashtable. */
360 unsigned char our_hashtable;
363 /* Character classes. Based on the more primitive macros in safe-ctype.h.
364 If the definition of `numchar' looks odd to you, please look up the
365 definition of a pp-number in the C standard [section 6.4.8 of C99].
367 In the unlikely event that characters other than \r and \n enter
368 the set is_vspace, the macro handle_newline() in cpplex.c must be
370 #define _dollar_ok(x) ((x) == '$' && CPP_OPTION (pfile, dollars_in_ident))
372 #define is_idchar(x) (ISIDNUM(x) || _dollar_ok(x))
373 #define is_numchar(x) ISIDNUM(x)
374 #define is_idstart(x) (ISIDST(x) || _dollar_ok(x))
375 #define is_numstart(x) ISDIGIT(x)
376 #define is_hspace(x) ISBLANK(x)
377 #define is_vspace(x) IS_VSPACE(x)
378 #define is_nvspace(x) IS_NVSPACE(x)
379 #define is_space(x) IS_SPACE_OR_NUL(x)
381 /* This table is constant if it can be initialized at compile time,
382 which is the case if cpp was compiled with GCC >=2.7, or another
383 compiler that supports C99. */
384 #if HAVE_DESIGNATED_INITIALIZERS
385 extern const unsigned char _cpp_trigraph_map[UCHAR_MAX + 1];
387 extern unsigned char _cpp_trigraph_map[UCHAR_MAX + 1];
392 #define CPP_PRINT_DEPS(PFILE) CPP_OPTION (PFILE, print_deps)
393 #define CPP_IN_SYSTEM_HEADER(PFILE) ((PFILE)->map && (PFILE)->map->sysp)
394 #define CPP_PEDANTIC(PF) CPP_OPTION (PF, pedantic)
395 #define CPP_WTRADITIONAL(PF) CPP_OPTION (PF, warn_traditional)
398 enum error_type { WARNING = 0, WARNING_SYSHDR, PEDWARN, ERROR, FATAL, ICE };
399 extern int _cpp_begin_message PARAMS ((cpp_reader *, enum error_type,
400 unsigned int, unsigned int));
403 extern void _cpp_free_definition PARAMS ((cpp_hashnode *));
404 extern int _cpp_create_definition PARAMS ((cpp_reader *, cpp_hashnode *));
405 extern void _cpp_pop_context PARAMS ((cpp_reader *));
408 extern void _cpp_init_hashtable PARAMS ((cpp_reader *, hash_table *));
409 extern void _cpp_destroy_hashtable PARAMS ((cpp_reader *));
412 extern void _cpp_fake_include PARAMS ((cpp_reader *, const char *));
413 extern void _cpp_never_reread PARAMS ((struct include_file *));
414 extern char *_cpp_simplify_pathname PARAMS ((char *));
415 extern bool _cpp_read_file PARAMS ((cpp_reader *, const char *));
416 extern bool _cpp_execute_include PARAMS ((cpp_reader *,
419 extern int _cpp_compare_file_date PARAMS ((cpp_reader *,
421 extern void _cpp_report_missing_guards PARAMS ((cpp_reader *));
422 extern void _cpp_init_includes PARAMS ((cpp_reader *));
423 extern void _cpp_cleanup_includes PARAMS ((cpp_reader *));
424 extern void _cpp_pop_file_buffer PARAMS ((cpp_reader *,
425 struct include_file *));
428 extern int _cpp_parse_expr PARAMS ((cpp_reader *));
431 extern cpp_token *_cpp_temp_token PARAMS ((cpp_reader *));
432 extern const cpp_token *_cpp_lex_token PARAMS ((cpp_reader *));
433 extern cpp_token *_cpp_lex_direct PARAMS ((cpp_reader *));
434 extern int _cpp_equiv_tokens PARAMS ((const cpp_token *,
436 extern void _cpp_init_tokenrun PARAMS ((tokenrun *, unsigned int));
437 extern void _cpp_init_pool PARAMS ((cpp_pool *, unsigned int,
438 unsigned int, unsigned int));
439 extern void _cpp_free_pool PARAMS ((cpp_pool *));
440 extern unsigned char *_cpp_pool_reserve PARAMS ((cpp_pool *, unsigned int));
441 extern unsigned char *_cpp_pool_alloc PARAMS ((cpp_pool *, unsigned int));
442 extern unsigned char *_cpp_next_chunk PARAMS ((cpp_pool *, unsigned int,
446 extern bool _cpp_push_next_buffer PARAMS ((cpp_reader *));
449 extern int _cpp_test_assertion PARAMS ((cpp_reader *, int *));
450 extern int _cpp_handle_directive PARAMS ((cpp_reader *, int));
451 extern void _cpp_define_builtin PARAMS ((cpp_reader *, const char *));
452 extern void _cpp_do__Pragma PARAMS ((cpp_reader *));
453 extern void _cpp_init_directives PARAMS ((cpp_reader *));
454 extern void _cpp_init_internal_pragmas PARAMS ((cpp_reader *));
455 extern void _cpp_do_file_change PARAMS ((cpp_reader *, enum lc_reason,
457 unsigned int, unsigned int));
458 extern void _cpp_pop_buffer PARAMS ((cpp_reader *));
460 /* Utility routines and macros. */
461 #define DSC(str) (const U_CHAR *)str, sizeof str - 1
462 #define xnew(T) (T *) xmalloc (sizeof(T))
463 #define xcnew(T) (T *) xcalloc (1, sizeof(T))
464 #define xnewvec(T, N) (T *) xmalloc (sizeof(T) * (N))
465 #define xcnewvec(T, N) (T *) xcalloc (N, sizeof(T))
466 #define xobnew(O, T) (T *) obstack_alloc (O, sizeof(T))
468 /* These are inline functions instead of macros so we can get type
470 typedef unsigned char U_CHAR;
471 #define U (const U_CHAR *) /* Intended use: U"string" */
473 static inline int ustrcmp PARAMS ((const U_CHAR *, const U_CHAR *));
474 static inline int ustrncmp PARAMS ((const U_CHAR *, const U_CHAR *,
476 static inline size_t ustrlen PARAMS ((const U_CHAR *));
477 static inline U_CHAR *uxstrdup PARAMS ((const U_CHAR *));
478 static inline U_CHAR *ustrchr PARAMS ((const U_CHAR *, int));
479 static inline int ufputs PARAMS ((const U_CHAR *, FILE *));
483 const U_CHAR *s1, *s2;
485 return strcmp ((const char *)s1, (const char *)s2);
490 const U_CHAR *s1, *s2;
493 return strncmp ((const char *)s1, (const char *)s2, n);
500 return strlen ((const char *)s1);
503 static inline U_CHAR *
507 return (U_CHAR *) xstrdup ((const char *)s1);
510 static inline U_CHAR *
515 return (U_CHAR *) strchr ((const char *)s1, c);
523 return fputs ((const char *)s, f);
526 #endif /* ! GCC_CPPHASH_H */