1 /* Part of CPP library.
2 Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002
3 Free Software Foundation, Inc.
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 2, or (at your option) any
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.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
19 /* This header defines all the internal data structures and functions
20 that need to be visible across files. It's called cpphash.h for
21 historical reasons. */
26 #include "hashtable.h"
28 struct directive; /* Deliberately incomplete. */
29 struct pending_option;
31 /* Test if a sign is valid within a preprocessing number. */
32 #define VALID_SIGN(c, prevc) \
33 (((c) == '+' || (c) == '-') && \
34 ((prevc) == 'e' || (prevc) == 'E' \
35 || (((prevc) == 'p' || (prevc) == 'P') \
36 && CPP_OPTION (pfile, extended_numbers))))
38 #define CPP_OPTION(PFILE, OPTION) ((PFILE)->opts.OPTION)
39 #define CPP_BUFFER(PFILE) ((PFILE)->buffer)
40 #define CPP_BUF_COLUMN(BUF, CUR) ((CUR) - (BUF)->line_base + (BUF)->col_adjust)
41 #define CPP_BUF_COL(BUF) CPP_BUF_COLUMN(BUF, (BUF)->cur)
43 /* Maximum nesting of cpp_buffers. We use a static limit, partly for
44 efficiency, and partly to limit runaway recursion. */
45 #define CPP_STACK_MAX 200
47 /* A generic memory buffer, and operations on it. */
48 typedef struct _cpp_buff _cpp_buff;
51 struct _cpp_buff *next;
52 unsigned char *base, *cur, *limit;
55 extern _cpp_buff *_cpp_get_buff PARAMS ((cpp_reader *, size_t));
56 extern void _cpp_release_buff PARAMS ((cpp_reader *, _cpp_buff *));
57 extern void _cpp_extend_buff PARAMS ((cpp_reader *, _cpp_buff **, size_t));
58 extern _cpp_buff *_cpp_append_extend_buff PARAMS ((cpp_reader *, _cpp_buff *,
60 extern void _cpp_free_buff PARAMS ((_cpp_buff *));
61 extern unsigned char *_cpp_aligned_alloc PARAMS ((cpp_reader *, size_t));
62 extern unsigned char *_cpp_unaligned_alloc PARAMS ((cpp_reader *, size_t));
64 #define BUFF_ROOM(BUFF) (size_t) ((BUFF)->limit - (BUFF)->cur)
65 #define BUFF_FRONT(BUFF) ((BUFF)->cur)
66 #define BUFF_LIMIT(BUFF) ((BUFF)->limit)
68 /* List of directories to look for include files in. */
71 struct search_path *next;
73 /* NOTE: NAME may not be null terminated for the case of the current
77 /* We use these to tell if the directory mentioned here is a duplicate
78 of an earlier directory on the search path. */
81 /* Non-zero if it is a system include directory. */
83 /* Mapping of file names for this directory. Only used on MS-DOS
84 and related platforms. */
85 struct file_name_map *name_map;
89 enum include_type {IT_INCLUDE, IT_INCLUDE_NEXT, IT_IMPORT, IT_CMDLINE};
93 const cpp_token *token;
94 const cpp_token **ptoken;
97 /* A "run" of tokens; part of a chain of runs. */
98 typedef struct tokenrun tokenrun;
101 tokenrun *next, *prev;
102 cpp_token *base, *limit;
105 typedef struct cpp_context cpp_context;
108 /* Doubly-linked list. */
109 cpp_context *next, *prev;
111 /* Contexts other than the base context are contiguous tokens.
112 e.g. macro expansions, expanded argument tokens. */
116 /* If non-NULL, a buffer used for storage related to this context.
117 When the context is popped, the buffer is released. */
120 /* For a macro context, the macro node, otherwise NULL. */
123 /* True if utoken element is token, else ptoken. */
129 /* Nonzero if first token on line is CPP_HASH. */
130 unsigned char in_directive;
132 /* True if we are skipping a failed conditional group. */
133 unsigned char skipping;
135 /* Nonzero if in a directive that takes angle-bracketed headers. */
136 unsigned char angled_headers;
138 /* Nonzero to save comments. Turned off if discard_comments, and in
139 all directives apart from #define. */
140 unsigned char save_comments;
142 /* Nonzero if we're mid-comment. */
143 unsigned char lexing_comment;
145 /* Nonzero if lexing __VA_ARGS__ is valid. */
146 unsigned char va_args_ok;
148 /* Nonzero if lexing poisoned identifiers is valid. */
149 unsigned char poisoned_ok;
151 /* Nonzero to prevent macro expansion. */
152 unsigned char prevent_expansion;
154 /* Nonzero when parsing arguments to a function-like macro. */
155 unsigned char parsing_args;
158 /* Special nodes - identifiers with predefined significance. */
161 cpp_hashnode *n_defined; /* defined operator */
162 cpp_hashnode *n_true; /* C++ keyword true */
163 cpp_hashnode *n_false; /* C++ keyword false */
164 cpp_hashnode *n__STRICT_ANSI__; /* STDC_0_IN_SYSTEM_HEADERS */
165 cpp_hashnode *n__VA_ARGS__; /* C99 vararg macros */
168 /* Represents the contents of a file cpplib has read in. */
171 const unsigned char *cur; /* current position */
172 const unsigned char *backup_to; /* if peeked character is not wanted */
173 const unsigned char *rlimit; /* end of valid data */
174 const unsigned char *line_base; /* start of current line */
176 struct cpp_buffer *prev;
178 const unsigned char *buf; /* Entire character buffer. */
180 /* Pointer into the include table; non-NULL if this is a file
181 buffer. Used for include_next and to record control macros. */
182 struct include_file *inc;
184 /* Value of if_stack at start of this file.
185 Used to prohibit unmatched #endif (etc) in an include file. */
186 struct if_stack *if_stack;
188 /* Token column position adjustment owing to tabs in whitespace. */
189 unsigned int col_adjust;
191 /* Contains PREV_WHITE and/or AVOID_LPASTE. */
192 unsigned char saved_flags;
194 /* Because of the way the lexer works, -Wtrigraphs can sometimes
195 warn twice for the same trigraph. This helps prevent that. */
196 const unsigned char *last_Wtrigraphs;
198 /* True if we have already warned about C++ comments in this file.
199 The warning happens only for C89 extended mode with -pedantic on,
200 or for -Wtraditional, and only once per file (otherwise it would
201 be far too noisy). */
202 unsigned char warned_cplusplus_comments;
204 /* True if we don't process trigraphs and escaped newlines. True
205 for preprocessed input, command line directives, and _Pragma
207 unsigned char from_stage3;
209 /* Nonzero means that the directory to start searching for ""
210 include files has been calculated and stored in "dir" below. */
211 unsigned char search_cached;
213 /* At EOF, a buffer is automatically popped. If RETURN_AT_EOF is
214 true, a CPP_EOF token is then returned. Otherwise, the next
215 token from the enclosing buffer is returned. */
218 /* The directory of the this buffer's file. Its NAME member is not
219 allocated, so we don't need to worry about freeing it. */
220 struct search_path dir;
223 /* A cpp_reader encapsulates the "state" of a pre-processor run.
224 Applying cpp_get_token repeatedly yields a stream of pre-processor
225 tokens. Usually, there is only one cpp_reader object active. */
228 /* Top of buffer stack. */
232 struct lexer_state state;
234 /* Source line tracking. */
235 struct line_maps line_maps;
236 const struct line_map *map;
239 /* The line of the '#' of the current directive. */
240 unsigned int directive_line;
242 /* Memory buffers. */
243 _cpp_buff *a_buff; /* Aligned permanent storage. */
244 _cpp_buff *u_buff; /* Unaligned permanent storage. */
245 _cpp_buff *free_buffs; /* Free buffer chain. */
248 struct cpp_context base_context;
249 struct cpp_context *context;
251 /* If in_directive, the directive if known. */
252 const struct directive *directive;
254 /* The next -include-d file; NULL if they all are done. If it
255 points to NULL, the last one is in progress, and
256 _cpp_maybe_push_include_file has yet to restore the line map. */
257 struct pending_option **next_include_file;
259 /* Multiple inlcude optimisation. */
260 const cpp_hashnode *mi_cmacro;
261 const cpp_hashnode *mi_ind_cmacro;
265 cpp_token *cur_token;
266 tokenrun base_run, *cur_run;
267 unsigned int lookaheads;
269 /* Non-zero prevents the lexer from re-using the token runs. */
270 unsigned int keep_tokens;
272 /* Error counter for exit code. */
275 /* Buffer to hold macro definition string. */
276 unsigned char *macro_buffer;
277 unsigned int macro_buffer_len;
279 /* Tree of other included files. See cppfiles.c. */
280 struct splay_tree_s *all_include_files;
282 /* Current maximum length of directory names in the search path
283 for include files. (Altered as we get more of them.) */
284 unsigned int max_include_len;
286 /* Date and time tokens. Calculated together if either is requested. */
290 /* EOF token, and a token forcing paste avoidance. */
291 cpp_token avoid_paste;
294 /* Opaque handle to the dependencies of mkdeps.c. Used by -M etc. */
297 /* Obstack holding all macro hash nodes. This never shrinks.
299 struct obstack hash_ob;
301 /* Obstack holding buffer and conditional structures. This is a
302 real stack. See cpplib.c. */
303 struct obstack buffer_ob;
305 /* Pragma table - dynamic, because a library user can add to the
306 list of recognized pragmas. */
307 struct pragma_entry *pragmas;
310 struct cpp_callbacks cb;
312 /* Identifier hash table. */
313 struct ht *hash_table;
315 /* User visible options. */
316 struct cpp_options opts;
318 /* Special nodes - identifiers with predefined significance to the
320 struct spec_nodes spec_nodes;
322 /* Whether to print our version number. Done this way so
323 we don't get it twice for -v -version. */
324 unsigned char print_version;
326 /* Whether cpplib owns the hashtable. */
327 unsigned char our_hashtable;
330 /* Character classes. Based on the more primitive macros in safe-ctype.h.
331 If the definition of `numchar' looks odd to you, please look up the
332 definition of a pp-number in the C standard [section 6.4.8 of C99].
334 In the unlikely event that characters other than \r and \n enter
335 the set is_vspace, the macro handle_newline() in cpplex.c must be
337 #define _dollar_ok(x) ((x) == '$' && CPP_OPTION (pfile, dollars_in_ident))
339 #define is_idchar(x) (ISIDNUM(x) || _dollar_ok(x))
340 #define is_numchar(x) ISIDNUM(x)
341 #define is_idstart(x) (ISIDST(x) || _dollar_ok(x))
342 #define is_numstart(x) ISDIGIT(x)
343 #define is_hspace(x) ISBLANK(x)
344 #define is_vspace(x) IS_VSPACE(x)
345 #define is_nvspace(x) IS_NVSPACE(x)
346 #define is_space(x) IS_SPACE_OR_NUL(x)
348 /* This table is constant if it can be initialized at compile time,
349 which is the case if cpp was compiled with GCC >=2.7, or another
350 compiler that supports C99. */
351 #if HAVE_DESIGNATED_INITIALIZERS
352 extern const unsigned char _cpp_trigraph_map[UCHAR_MAX + 1];
354 extern unsigned char _cpp_trigraph_map[UCHAR_MAX + 1];
359 #define CPP_PRINT_DEPS(PFILE) CPP_OPTION (PFILE, print_deps)
360 #define CPP_IN_SYSTEM_HEADER(PFILE) ((PFILE)->map && (PFILE)->map->sysp)
361 #define CPP_PEDANTIC(PF) CPP_OPTION (PF, pedantic)
362 #define CPP_WTRADITIONAL(PF) CPP_OPTION (PF, warn_traditional)
365 extern int _cpp_begin_message PARAMS ((cpp_reader *, int,
366 unsigned int, unsigned int));
369 extern void _cpp_free_definition PARAMS ((cpp_hashnode *));
370 extern int _cpp_create_definition PARAMS ((cpp_reader *, cpp_hashnode *));
371 extern void _cpp_pop_context PARAMS ((cpp_reader *));
374 extern void _cpp_init_hashtable PARAMS ((cpp_reader *, hash_table *));
375 extern void _cpp_destroy_hashtable PARAMS ((cpp_reader *));
378 extern void _cpp_fake_include PARAMS ((cpp_reader *, const char *));
379 extern void _cpp_never_reread PARAMS ((struct include_file *));
380 extern char *_cpp_simplify_pathname PARAMS ((char *));
381 extern bool _cpp_read_file PARAMS ((cpp_reader *, const char *));
382 extern bool _cpp_execute_include PARAMS ((cpp_reader *,
385 extern int _cpp_compare_file_date PARAMS ((cpp_reader *,
387 extern void _cpp_report_missing_guards PARAMS ((cpp_reader *));
388 extern void _cpp_init_includes PARAMS ((cpp_reader *));
389 extern void _cpp_cleanup_includes PARAMS ((cpp_reader *));
390 extern void _cpp_pop_file_buffer PARAMS ((cpp_reader *,
391 struct include_file *));
394 extern int _cpp_parse_expr PARAMS ((cpp_reader *));
397 extern cpp_token *_cpp_temp_token PARAMS ((cpp_reader *));
398 extern const cpp_token *_cpp_lex_token PARAMS ((cpp_reader *));
399 extern cpp_token *_cpp_lex_direct PARAMS ((cpp_reader *));
400 extern int _cpp_equiv_tokens PARAMS ((const cpp_token *,
402 extern void _cpp_init_tokenrun PARAMS ((tokenrun *, unsigned int));
405 extern void _cpp_maybe_push_include_file PARAMS ((cpp_reader *));
408 extern int _cpp_test_assertion PARAMS ((cpp_reader *, int *));
409 extern int _cpp_handle_directive PARAMS ((cpp_reader *, int));
410 extern void _cpp_define_builtin PARAMS ((cpp_reader *, const char *));
411 extern void _cpp_do__Pragma PARAMS ((cpp_reader *));
412 extern void _cpp_init_directives PARAMS ((cpp_reader *));
413 extern void _cpp_init_internal_pragmas PARAMS ((cpp_reader *));
414 extern void _cpp_do_file_change PARAMS ((cpp_reader *, enum lc_reason,
416 unsigned int, unsigned int));
417 extern void _cpp_pop_buffer PARAMS ((cpp_reader *));
419 /* Utility routines and macros. */
420 #define DSC(str) (const uchar *)str, sizeof str - 1
421 #define xnew(T) (T *) xmalloc (sizeof(T))
422 #define xcnew(T) (T *) xcalloc (1, sizeof(T))
423 #define xnewvec(T, N) (T *) xmalloc (sizeof(T) * (N))
424 #define xcnewvec(T, N) (T *) xcalloc (N, sizeof(T))
425 #define xobnew(O, T) (T *) obstack_alloc (O, sizeof(T))
427 /* These are inline functions instead of macros so we can get type
429 typedef unsigned char uchar;
430 #define U (const uchar *) /* Intended use: U"string" */
432 static inline int ustrcmp PARAMS ((const uchar *, const uchar *));
433 static inline int ustrncmp PARAMS ((const uchar *, const uchar *,
435 static inline size_t ustrlen PARAMS ((const uchar *));
436 static inline uchar *uxstrdup PARAMS ((const uchar *));
437 static inline uchar *ustrchr PARAMS ((const uchar *, int));
438 static inline int ufputs PARAMS ((const uchar *, FILE *));
442 const uchar *s1, *s2;
444 return strcmp ((const char *)s1, (const char *)s2);
449 const uchar *s1, *s2;
452 return strncmp ((const char *)s1, (const char *)s2, n);
459 return strlen ((const char *)s1);
462 static inline uchar *
466 return (uchar *) xstrdup ((const char *)s1);
469 static inline uchar *
474 return (uchar *) strchr ((const char *)s1, c);
482 return fputs ((const char *)s, f);
485 #endif /* ! GCC_CPPHASH_H */