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, *locked;
70 unsigned char *pos; /* Current position. */
75 /* List of directories to look for include files in. */
78 struct search_path *next;
80 /* NOTE: NAME may not be null terminated for the case of the current
84 /* We use these to tell if the directory mentioned here is a duplicate
85 of an earlier directory on the search path. */
88 /* Non-zero if it is a system include directory. */
90 /* Mapping of file names for this directory. Only used on MS-DOS
91 and related platforms. */
92 struct file_name_map *name_map;
96 enum include_type {IT_INCLUDE, IT_INCLUDE_NEXT, IT_IMPORT, IT_CMDLINE};
98 typedef struct toklist toklist;
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. */
115 /* For a macro context, these are the macro and its arguments. */
121 /* Nonzero if first token on line is CPP_HASH. */
122 unsigned char in_directive;
124 /* True if we are skipping a failed conditional group. */
125 unsigned char skipping;
127 /* Nonzero if in a directive that takes angle-bracketed headers. */
128 unsigned char angled_headers;
130 /* Nonzero to save comments. Turned off if discard_comments, and in
131 all directives apart from #define. */
132 unsigned char save_comments;
134 /* Nonzero if we're mid-comment. */
135 unsigned char lexing_comment;
137 /* Nonzero if lexing __VA_ARGS__ is valid. */
138 unsigned char va_args_ok;
140 /* Nonzero if lexing poisoned identifiers is valid. */
141 unsigned char poisoned_ok;
143 /* Nonzero to prevent macro expansion. */
144 unsigned char prevent_expansion;
146 /* Nonzero when parsing arguments to a function-like macro. */
147 unsigned char parsing_args;
149 /* Nonzero when in a # NUMBER directive. */
150 unsigned char line_extension;
153 /* Special nodes - identifiers with predefined significance. */
156 cpp_hashnode *n_L; /* L"str" */
157 cpp_hashnode *n_defined; /* defined operator */
158 cpp_hashnode *n_true; /* C++ keyword true */
159 cpp_hashnode *n_false; /* C++ keyword false */
160 cpp_hashnode *n__Pragma; /* _Pragma operator */
161 cpp_hashnode *n__STRICT_ANSI__; /* STDC_0_IN_SYSTEM_HEADERS */
162 cpp_hashnode *n__CHAR_UNSIGNED__; /* plain char is unsigned */
163 cpp_hashnode *n__VA_ARGS__; /* C99 vararg macros */
168 const unsigned char *cur; /* current position */
169 const unsigned char *rlimit; /* end of valid data */
170 const unsigned char *line_base; /* start of current line */
171 cppchar_t read_ahead; /* read ahead character */
172 cppchar_t extra_char; /* extra read-ahead for long tokens. */
174 struct cpp_reader *pfile; /* Owns this buffer. */
175 struct cpp_buffer *prev;
177 const unsigned char *buf; /* entire buffer */
179 /* Filename specified with #line command. */
180 const char *nominal_fname;
182 /* Pointer into the include table. Used for include_next and
183 to record control macros. */
184 struct include_file *inc;
186 /* Value of if_stack at start of this file.
187 Used to prohibit unmatched #endif (etc) in an include file. */
188 struct if_stack *if_stack;
190 /* Token column position adjustment owing to tabs in whitespace. */
191 unsigned int col_adjust;
193 /* The line of the buffer that we return to after a #include.
194 Strictly this is redundant, since it can be calculated from the
195 line maps, but it is clearest to save it here. */
196 unsigned int return_to_line;
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 /* 1 = system header file, 2 = C system header file used for C++. */
219 /* Nonzero means that the directory to start searching for ""
220 include files has been calculated and stored in "dir" below. */
221 unsigned char search_cached;
223 /* At EOF, a buffer is automatically popped. If RETURN_AT_EOF is
224 true, a CPP_EOF token is then returned. Otherwise, the next
225 token from the enclosing buffer is returned. */
229 ENUM_BITFIELD (cpp_buffer_type) type : 8;
231 /* The directory of the this buffer's file. Its NAME member is not
232 allocated, so we don't need to worry about freeing it. */
233 struct search_path dir;
236 /* A cpp_reader encapsulates the "state" of a pre-processor run.
237 Applying cpp_get_token repeatedly yields a stream of pre-processor
238 tokens. Usually, there is only one cpp_reader object active. */
242 /* Top of buffer stack. */
246 struct lexer_state state;
248 /* Source line tracking. */
249 struct line_maps line_maps;
250 struct line_map *map;
253 /* The position of the last lexed token and last lexed directive. */
254 cpp_lexer_pos lexer_pos;
255 cpp_lexer_pos directive_pos;
256 unsigned int directive_line;
259 cpp_pool ident_pool; /* For all identifiers, and permanent
260 numbers and strings. */
261 cpp_pool macro_pool; /* For macro definitions. Permanent. */
262 cpp_pool argument_pool; /* For macro arguments. Temporary. */
265 struct cpp_context base_context;
266 struct cpp_context *context;
268 /* If in_directive, the directive if known. */
269 const struct directive *directive;
271 /* Multiple inlcude optimisation. */
272 const cpp_hashnode *mi_cmacro;
273 const cpp_hashnode *mi_ind_cmacro;
276 /* Token lookahead. */
277 struct cpp_lookahead *la_read; /* Read from this lookahead. */
278 struct cpp_lookahead *la_write; /* Write to this lookahead. */
279 struct cpp_lookahead *la_unused; /* Free store. */
280 struct cpp_lookahead *la_saved; /* Backup when entering directive. */
282 /* Error counter for exit code. */
285 /* Line and column where a newline was first seen in a string
286 constant (multi-line strings). */
287 cpp_lexer_pos mlstring_pos;
289 /* Buffer to hold macro definition string. */
290 unsigned char *macro_buffer;
291 unsigned int macro_buffer_len;
293 /* Current depth in #include directives that use <...>. */
294 unsigned int system_include_depth;
296 /* Current depth of buffer stack. */
297 unsigned int buffer_stack_depth;
299 /* Current depth in #include directives. */
300 unsigned int include_depth;
302 /* Tree of other included files. See cppfiles.c. */
303 struct splay_tree_s *all_include_files;
305 /* Current maximum length of directory names in the search path
306 for include files. (Altered as we get more of them.) */
307 unsigned int max_include_len;
309 /* Date and time tokens. Calculated together if either is requested. */
313 /* Opaque handle to the dependencies of mkdeps.c. Used by -M etc. */
316 /* Obstack holding all macro hash nodes. This never shrinks.
318 struct obstack hash_ob;
320 /* Obstack holding buffer and conditional structures. This is a
321 real stack. See cpplib.c. */
322 struct obstack buffer_ob;
324 /* Pragma table - dynamic, because a library user can add to the
325 list of recognized pragmas. */
326 struct pragma_entry *pragmas;
329 struct cpp_callbacks cb;
331 /* Identifier hash table. */
332 struct ht *hash_table;
334 /* User visible options. */
335 struct cpp_options opts;
337 /* Special nodes - identifiers with predefined significance to the
339 struct spec_nodes spec_nodes;
341 /* Whether to print our version number. Done this way so
342 we don't get it twice for -v -version. */
343 unsigned char print_version;
345 /* Whether cpplib owns the hashtable. */
346 unsigned char our_hashtable;
349 /* Character classes. Based on the more primitive macros in safe-ctype.h.
350 If the definition of `numchar' looks odd to you, please look up the
351 definition of a pp-number in the C standard [section 6.4.8 of C99].
353 In the unlikely event that characters other than \r and \n enter
354 the set is_vspace, the macro handle_newline() in cpplex.c must be
356 #define _dollar_ok(x) ((x) == '$' && CPP_OPTION (pfile, dollars_in_ident))
358 #define is_idchar(x) (ISIDNUM(x) || _dollar_ok(x))
359 #define is_numchar(x) ISIDNUM(x)
360 #define is_idstart(x) (ISIDST(x) || _dollar_ok(x))
361 #define is_numstart(x) ISDIGIT(x)
362 #define is_hspace(x) ISBLANK(x)
363 #define is_vspace(x) IS_VSPACE(x)
364 #define is_nvspace(x) IS_NVSPACE(x)
365 #define is_space(x) IS_SPACE_OR_NUL(x)
367 /* This table is constant if it can be initialized at compile time,
368 which is the case if cpp was compiled with GCC >=2.7, or another
369 compiler that supports C99. */
370 #if HAVE_DESIGNATED_INITIALIZERS
371 extern const unsigned char _cpp_trigraph_map[UCHAR_MAX + 1];
373 extern unsigned char _cpp_trigraph_map[UCHAR_MAX + 1];
378 #define CPP_PRINT_DEPS(PFILE) CPP_OPTION (PFILE, print_deps)
379 #define CPP_IN_SYSTEM_HEADER(PFILE) \
380 (CPP_BUFFER (PFILE) && CPP_BUFFER (PFILE)->sysp)
381 #define CPP_PEDANTIC(PF) CPP_OPTION (PF, pedantic)
382 #define CPP_WTRADITIONAL(PF) CPP_OPTION (PF, warn_traditional)
385 enum error_type { WARNING = 0, WARNING_SYSHDR, PEDWARN, ERROR, FATAL, ICE };
386 extern int _cpp_begin_message PARAMS ((cpp_reader *, enum error_type,
387 const char *, const cpp_lexer_pos *));
390 extern void _cpp_free_definition PARAMS ((cpp_hashnode *));
391 extern int _cpp_create_definition PARAMS ((cpp_reader *, cpp_hashnode *));
392 extern void _cpp_pop_context PARAMS ((cpp_reader *));
393 extern void _cpp_free_lookaheads PARAMS ((cpp_reader *));
394 extern void _cpp_release_lookahead PARAMS ((cpp_reader *));
395 extern void _cpp_push_token PARAMS ((cpp_reader *, const cpp_token *,
396 const cpp_lexer_pos *));
399 extern void _cpp_init_hashtable PARAMS ((cpp_reader *, hash_table *));
400 extern void _cpp_destroy_hashtable PARAMS ((cpp_reader *));
403 extern void _cpp_fake_include PARAMS ((cpp_reader *, const char *));
404 extern void _cpp_never_reread PARAMS ((struct include_file *));
405 extern char *_cpp_simplify_pathname PARAMS ((char *));
406 extern int _cpp_read_file PARAMS ((cpp_reader *, const char *));
407 extern int _cpp_execute_include PARAMS ((cpp_reader *,
410 extern int _cpp_compare_file_date PARAMS ((cpp_reader *,
412 extern void _cpp_report_missing_guards PARAMS ((cpp_reader *));
413 extern void _cpp_init_includes PARAMS ((cpp_reader *));
414 extern void _cpp_cleanup_includes PARAMS ((cpp_reader *));
415 extern void _cpp_pop_file_buffer PARAMS ((cpp_reader *, cpp_buffer *));
418 extern int _cpp_parse_expr PARAMS ((cpp_reader *));
421 extern void _cpp_lex_token PARAMS ((cpp_reader *, cpp_token *));
422 extern int _cpp_equiv_tokens PARAMS ((const cpp_token *,
424 extern void _cpp_init_pool PARAMS ((cpp_pool *, unsigned int,
425 unsigned int, unsigned int));
426 extern void _cpp_free_pool PARAMS ((cpp_pool *));
427 extern unsigned char *_cpp_pool_reserve PARAMS ((cpp_pool *, unsigned int));
428 extern unsigned char *_cpp_pool_alloc PARAMS ((cpp_pool *, unsigned int));
429 extern unsigned char *_cpp_next_chunk PARAMS ((cpp_pool *, unsigned int,
431 extern void _cpp_lock_pool PARAMS ((cpp_pool *));
432 extern void _cpp_unlock_pool PARAMS ((cpp_pool *));
435 extern int _cpp_test_assertion PARAMS ((cpp_reader *, int *));
436 extern int _cpp_handle_directive PARAMS ((cpp_reader *, int));
437 extern void _cpp_define_builtin PARAMS ((cpp_reader *, const char *));
438 extern void _cpp_do__Pragma PARAMS ((cpp_reader *));
439 extern void _cpp_init_directives PARAMS ((cpp_reader *));
440 extern void _cpp_init_internal_pragmas PARAMS ((cpp_reader *));
441 extern void _cpp_do_file_change PARAMS ((cpp_reader *, enum lc_reason,
443 extern void _cpp_pop_buffer PARAMS ((cpp_reader *));
445 /* Utility routines and macros. */
446 #define DSC(str) (const U_CHAR *)str, sizeof str - 1
447 #define xnew(T) (T *) xmalloc (sizeof(T))
448 #define xcnew(T) (T *) xcalloc (1, sizeof(T))
449 #define xnewvec(T, N) (T *) xmalloc (sizeof(T) * (N))
450 #define xcnewvec(T, N) (T *) xcalloc (N, sizeof(T))
451 #define xobnew(O, T) (T *) obstack_alloc (O, sizeof(T))
453 /* These are inline functions instead of macros so we can get type
455 typedef unsigned char U_CHAR;
456 #define U (const U_CHAR *) /* Intended use: U"string" */
458 static inline int ustrcmp PARAMS ((const U_CHAR *, const U_CHAR *));
459 static inline int ustrncmp PARAMS ((const U_CHAR *, const U_CHAR *,
461 static inline size_t ustrlen PARAMS ((const U_CHAR *));
462 static inline U_CHAR *uxstrdup PARAMS ((const U_CHAR *));
463 static inline U_CHAR *ustrchr PARAMS ((const U_CHAR *, int));
464 static inline int ufputs PARAMS ((const U_CHAR *, FILE *));
468 const U_CHAR *s1, *s2;
470 return strcmp ((const char *)s1, (const char *)s2);
475 const U_CHAR *s1, *s2;
478 return strncmp ((const char *)s1, (const char *)s2, n);
485 return strlen ((const char *)s1);
488 static inline U_CHAR *
492 return (U_CHAR *) xstrdup ((const char *)s1);
495 static inline U_CHAR *
500 return (U_CHAR *) strchr ((const char *)s1, c);
508 return fputs ((const char *)s, f);
511 #endif /* ! GCC_CPPHASH_H */