1 /* Definitions for CPP library.
2 Copyright (C) 1995, 96-99, 2000 Free Software Foundation, Inc.
3 Written by Per Bothner, 1994-95.
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 In other words, you are welcome to use, share and improve this program.
20 You are forbidden to forbid anyone else to use, share and improve
21 what you give them. Help stamp out software-hoarding! */
22 #ifndef __GCC_CPPLIB__
23 #define __GCC_CPPLIB__
25 #include <sys/types.h>
31 typedef struct cpp_reader cpp_reader;
32 typedef struct cpp_buffer cpp_buffer;
33 typedef struct cpp_options cpp_options;
34 typedef struct cpp_printer cpp_printer;
42 CPP_VSPACE, /* newlines and #line directives */
51 CPP_ASSERTION, /* #machine(a29k) */
52 CPP_STRINGIZE, /* stringize macro argument */
53 CPP_TOKPASTE, /* paste macro arg with next/prev token */
59 CPP_SEMICOLON, /* ";" */
60 CPP_3DOTS, /* "..." */
61 CPP_POP /* We're about to pop the buffer stack. */
64 typedef int (*parse_cleanup_t) PARAMS((cpp_buffer *, cpp_reader *));
68 const unsigned char *cur; /* current position */
69 const unsigned char *rlimit; /* end of valid data */
70 const unsigned char *buf; /* entire buffer */
71 const unsigned char *line_base; /* start of current line */
72 const unsigned char *mark; /* Saved position for lengthy backtrack. */
74 struct cpp_buffer *prev;
76 /* Filename specified with #line command. */
77 const char *nominal_fname;
78 /* Actual directory of this file, used only for "" includes */
79 struct file_name_list *actual_dir;
81 /* Pointer into the include hash table. Used for include_next and
82 to record control macros. */
85 parse_cleanup_t cleanup;
87 /* If the buffer is the expansion of a macro, this points to the
88 macro's hash table entry. */
89 struct hashnode *macro;
91 /* Value of if_stack at start of this file.
92 Used to prohibit unmatched #endif (etc) in an include file. */
93 struct if_stack *if_stack;
95 /* Line number at line_base (above). */
98 /* True if this is a header file included using <FILENAME>. */
101 /* True if end-of-file has already been hit once in this buffer. */
104 /* True if buffer contains escape sequences.
105 Currently there are two kinds:
106 "\r-" means following identifier should not be macro-expanded.
107 "\r " means a token-separator. This turns into " " in final output
108 if not stringizing and needed to separate tokens; otherwise nothing.
109 Any other two-character sequence beginning with \r is an error.
111 If this is NOT set, then \r is a one-character escape meaning backslash
112 newline. This is guaranteed not to occur in the middle of a token.
113 The two interpretations of \r do not conflict, because the two-character
114 escapes are used only in macro buffers, and backslash-newline is removed
115 from macro expansion text in collect_expansion and/or macarg. */
118 /* Used by the C++ frontend to implement redirected input (such as for
119 default argument and/or template parsing). */
122 /* True if we have already warned about C++ comments in this file.
123 The warning happens only for C89 extended mode with -pedantic on,
124 and only once per file (otherwise it would be far too noisy). */
125 char warned_cplusplus_comments;
128 struct file_name_map_list;
131 /* Maximum nesting of cpp_buffers. We use a static limit, partly for
132 efficiency, and partly to limit runaway recursion. */
133 #define CPP_STACK_MAX 200
135 /* Values for opts.dump_macros.
136 dump_only means inhibit output of the preprocessed text
137 and instead output the definitions of all user-defined
138 macros in a form suitable for use as input to cccp.
139 dump_names means pass #define and the macro name through to output.
140 dump_definitions means pass the whole definition (plus #define) through
142 enum { dump_none = 0, dump_only, dump_names, dump_definitions };
144 /* This structure is nested inside struct cpp_reader, and
145 carries all the options visible to the command line. */
148 /* Name of input and output files. */
149 const char *in_fname;
150 const char *out_fname;
152 /* Pending options - -D, -U, -A, -I, -ixxx. */
153 struct cpp_pending *pending;
155 /* File name which deps are being written to. This is 0 if deps are
156 being written to stdout. */
157 const char *deps_file;
159 /* Target-name to write with the dependency information. */
162 /* Search paths for include files. */
163 struct file_name_list *quote_include; /* First dir to search for "file" */
164 struct file_name_list *bracket_include;/* First dir to search for <file> */
166 /* Map between header names and file names, used only on DOS where
167 file names are limited in length. */
168 struct file_name_map_list *map_list;
170 /* Directory prefix that should replace `/usr/lib/gcc-lib/TARGET/VERSION'
171 in the standard include file directories. */
172 const char *include_prefix;
173 unsigned int include_prefix_len;
175 /* Non-0 means -v, so print the full set of include dirs. */
176 unsigned char verbose;
178 /* Nonzero means use extra default include directories for C++. */
179 unsigned char cplusplus;
181 /* Nonzero means handle cplusplus style comments */
182 unsigned char cplusplus_comments;
184 /* Nonzero means handle #import, for objective C. */
187 /* Nonzero means this is an assembly file, so ignore unrecognized
188 directives and the "# 33" form of #line, both of which are
189 probably comments. Also, permit unbalanced ' strings (again,
190 likely to be in comments). */
191 unsigned char lang_asm;
193 /* Nonzero means this is Fortran, and we don't know where the
194 comments are, so permit unbalanced ' strings. Unlike lang_asm,
195 this does not ignore unrecognized directives. */
196 unsigned char lang_fortran;
198 /* Nonzero means handle CHILL comment syntax and output CHILL string
199 delimiters for __DATE__ etc. */
202 /* Nonzero means don't copy comments into the output file. */
203 unsigned char discard_comments;
205 /* Nonzero means process the ANSI trigraph sequences. */
206 unsigned char trigraphs;
208 /* Nonzero means print the names of included files rather than the
209 preprocessed output. 1 means just the #include "...", 2 means
210 #include <...> as well. */
211 unsigned char print_deps;
213 /* Nonzero if missing .h files in -M output are assumed to be
214 generated files and not errors. */
215 unsigned char print_deps_missing_files;
217 /* If true, fopen (deps_file, "a") else fopen (deps_file, "w"). */
218 unsigned char print_deps_append;
220 /* Nonzero means print names of header files (-H). */
221 unsigned char print_include_names;
223 /* Nonzero means cpp_pedwarn causes a hard error. */
224 unsigned char pedantic_errors;
226 /* Nonzero means don't print warning messages. */
227 unsigned char inhibit_warnings;
229 /* Nonzero means don't print error messages. Has no option to
230 select it, but can be set by a user of cpplib (e.g. fix-header). */
231 unsigned char inhibit_errors;
233 /* Nonzero means warn if slash-star appears in a comment. */
234 unsigned char warn_comments;
236 /* Nonzero means warn if there are any trigraphs. */
237 unsigned char warn_trigraphs;
239 /* Nonzero means warn if #import is used. */
240 unsigned char warn_import;
242 /* Nonzero means warn if a macro argument is (or would be)
243 stringified with -traditional, and warn about directives
244 with the # indented from the beginning of the line. */
245 unsigned char warn_traditional;
247 /* Nonzero means turn warnings into errors. */
248 unsigned char warnings_are_errors;
250 /* Nonzero causes output not to be done, but directives such as
251 #define that have side effects are still obeyed. */
252 unsigned char no_output;
254 /* Nonzero means we should look for header.gcc files that remap file
258 /* Nonzero means don't output line number information. */
259 unsigned char no_line_commands;
261 /* Nonzero means -I- has been seen, so don't look for #include "foo"
262 the source-file directory. */
263 unsigned char ignore_srcdir;
265 /* Zero means dollar signs are punctuation. */
266 unsigned char dollars_in_ident;
268 /* Nonzero means try to imitate old fashioned non-ANSI preprocessor. */
269 unsigned char traditional;
271 /* Nonzero means warn if undefined identifiers are evaluated in an #if. */
272 unsigned char warn_undef;
274 /* Nonzero for the 1989 C Standard, including corrigenda and amendments. */
277 /* Nonzero for the 1999 C Standard, including corrigenda and amendments. */
280 /* Nonzero means give all the error messages the ANSI standard requires. */
281 unsigned char pedantic;
283 /* Nonzero means we're looking at already preprocessed code, so don't
284 bother trying to do macro expansion and whatnot. */
285 unsigned char preprocessed;
287 /* Nonzero disables all the standard directories for headers. */
288 unsigned char no_standard_includes;
290 /* Nonzero disables the C++-specific standard directories for headers. */
291 unsigned char no_standard_cplusplus_includes;
293 /* Nonzero means dump macros in some fashion - see above. */
294 unsigned char dump_macros;
296 /* Nonzero means pass all #define and #undef directives which we
297 actually process through to the output stream. This feature is
298 used primarily to allow cc1 to record the #defines and #undefs
299 for the sake of debuggers which understand about preprocessor
300 macros, but it may also be useful with -E to figure out how
301 symbols are defined, and where they are defined. */
302 unsigned char debug_output;
304 /* Nonzero means pass #include lines through to the output. */
305 unsigned char dump_includes;
307 /* Print column number in error messages. */
308 unsigned char show_column;
312 /* A cpp_reader encapsulates the "state" of a pre-processor run.
313 Applying cpp_get_token repeatedly yields a stream of pre-processor
314 tokens. Usually, there is only one cpp_reader object active. */
320 /* A buffer used for both for cpp_get_token's output, and also internally. */
321 unsigned char *token_buffer;
322 /* Allocated size of token_buffer. CPP_RESERVE allocates space. */
323 unsigned int token_buffer_size;
324 /* End of the written part of token_buffer. */
325 unsigned char *limit;
327 /* Error counter for exit code */
330 /* Line where a newline was first seen in a string constant. */
331 unsigned int multiline_string_line;
333 /* Current depth in #include directives that use <...>. */
334 unsigned int system_include_depth;
336 /* Current depth of buffer stack. */
337 unsigned int buffer_stack_depth;
339 /* Hash table of macros and assertions. See cpphash.c */
340 struct htab *hashtab;
342 /* Hash table of other included files. See cppfiles.c */
343 struct htab *all_include_files;
345 /* Chain of `actual directory' file_name_list entries,
347 struct file_name_list *actual_dirs;
349 /* Current maximum length of directory names in the search path
350 for include files. (Altered as we get more of them.) */
351 unsigned int max_include_len;
353 struct if_stack *if_stack;
354 const unsigned char *potential_control_macro;
356 /* Buffer of -M output. */
359 /* A buffer used only by read_and_prescan (in cppfiles.c), which is
360 allocated once per cpp_reader object to keep it off the stack. */
361 unsigned char *input_buffer;
362 size_t input_buffer_len;
364 /* User visible options. */
365 struct cpp_options opts;
367 /* Nonzero means we have printed (while error reporting) a list of
368 containing files that matches the current status. */
369 unsigned char input_stack_listing_current;
371 /* If non-zero, macros are not expanded. */
372 unsigned char no_macro_expand;
374 /* If non-zero, directives cause a hard error. Used when parsing
376 unsigned char no_directives;
378 /* We're printed a warning recommending against using #import. */
379 unsigned char import_warning;
381 /* If true, characters between '<' and '>' are a single (string) token. */
382 unsigned char parsing_include_directive;
384 /* If true, # introduces an assertion (see do_assert) */
385 unsigned char parsing_if_directive;
387 /* If true, # and ## are the STRINGIZE and TOKPASTE operators */
388 unsigned char parsing_define_directive;
390 /* True if escape sequences (as described for has_escapes in
391 parse_buffer) should be emitted. */
392 unsigned char output_escapes;
394 /* 0: Have seen non-white-space on this line.
395 1: Only seen white space so far on this line.
396 2: Only seen white space so far in this file. */
397 unsigned char only_seen_white;
399 /* True after cpp_start_read completes. Used to inhibit some
400 warnings while parsing the command line. */
401 unsigned char done_initializing;
404 /* struct cpp_printer encapsulates state used to convert the stream of
405 tokens coming from cpp_get_token back into a text file. Not
406 everyone wants to do that, hence we separate the function. */
410 FILE *outf; /* stream to write to */
411 const char *last_fname; /* previous file name */
412 unsigned int last_bsd; /* did we just push? */
413 unsigned int lineno; /* line currently being written */
414 unsigned int written; /* low water mark in token buffer */
417 #define CPP_FATAL_LIMIT 1000
418 /* True if we have seen a "fatal" error. */
419 #define CPP_FATAL_ERRORS(READER) ((READER)->errors >= CPP_FATAL_LIMIT)
421 /* Macros for manipulating the token_buffer. */
423 /* Number of characters currently in PFILE's output buffer. */
424 #define CPP_WRITTEN(PFILE) ((size_t)((PFILE)->limit - (PFILE)->token_buffer))
425 #define CPP_PWRITTEN(PFILE) ((PFILE)->limit)
426 #define CPP_ADJUST_WRITTEN(PFILE,DELTA) ((PFILE)->limit += (DELTA))
427 #define CPP_SET_WRITTEN(PFILE,N) ((PFILE)->limit = (PFILE)->token_buffer + (N))
429 #define CPP_OPTION(PFILE, OPTION) ((PFILE)->opts.OPTION)
430 #define CPP_BUFFER(PFILE) ((PFILE)->buffer)
431 #define CPP_BUF_LINE(BUF) ((BUF)->lineno)
432 #define CPP_BUF_COL(BUF) ((BUF)->cur - (BUF)->line_base)
434 /* Name under which this program was invoked. */
435 extern const char *progname;
437 extern int cpp_handle_options PARAMS ((cpp_reader *, int, char **));
438 extern enum cpp_ttype cpp_get_token PARAMS ((cpp_reader *));
439 extern enum cpp_ttype cpp_get_non_space_token PARAMS ((cpp_reader *));
441 extern void cpp_reader_init PARAMS ((cpp_reader *));
442 extern cpp_printer *cpp_printer_init PARAMS ((cpp_reader *, cpp_printer *));
443 extern int cpp_start_read PARAMS ((cpp_reader *, cpp_printer *, const char *));
444 extern void cpp_output_tokens PARAMS ((cpp_reader *, cpp_printer *));
445 extern void cpp_finish PARAMS ((cpp_reader *, cpp_printer *));
446 extern void cpp_cleanup PARAMS ((cpp_reader *));
448 extern cpp_buffer *cpp_file_buffer PARAMS((cpp_reader *));
449 extern void cpp_define PARAMS ((cpp_reader *, const char *));
450 extern void cpp_assert PARAMS ((cpp_reader *, const char *));
451 extern void cpp_undef PARAMS ((cpp_reader *, const char *));
452 extern void cpp_unassert PARAMS ((cpp_reader *, const char *));
454 /* N.B. The error-message-printer prototypes have not been nicely
455 formatted because exgettext needs to see 'msgid' on the same line
456 as the name of the function in order to work properly. Only the
457 string argument gets a name in an effort to keep the lines from
458 getting ridiculously oversized. */
460 extern void cpp_ice PARAMS ((cpp_reader *, const char *msgid, ...))
462 extern void cpp_fatal PARAMS ((cpp_reader *, const char *msgid, ...))
464 extern void cpp_error PARAMS ((cpp_reader *, const char *msgid, ...))
466 extern void cpp_warning PARAMS ((cpp_reader *, const char *msgid, ...))
468 extern void cpp_pedwarn PARAMS ((cpp_reader *, const char *msgid, ...))
470 extern void cpp_notice PARAMS ((cpp_reader *, const char *msgid, ...))
472 extern void cpp_error_with_line PARAMS ((cpp_reader *, int, int, const char *msgid, ...))
474 extern void cpp_warning_with_line PARAMS ((cpp_reader *, int, int, const char *msgid, ...))
476 extern void cpp_pedwarn_with_line PARAMS ((cpp_reader *, int, int, const char *msgid, ...))
478 extern void cpp_pedwarn_with_file_and_line PARAMS ((cpp_reader *, const char *, int, int, const char *msgid, ...))
480 extern void cpp_error_from_errno PARAMS ((cpp_reader *, const char *));
481 extern void cpp_notice_from_errno PARAMS ((cpp_reader *, const char *));
484 extern cpp_buffer *cpp_push_buffer PARAMS ((cpp_reader *,
485 const unsigned char *, long));
486 extern cpp_buffer *cpp_pop_buffer PARAMS ((cpp_reader *));
487 extern void cpp_scan_buffer PARAMS ((cpp_reader *, cpp_printer *));
488 extern void cpp_scan_buffer_nooutput PARAMS ((cpp_reader *));
491 extern int cpp_defined PARAMS ((cpp_reader *,
492 const unsigned char *, int));
495 extern int cpp_included PARAMS ((cpp_reader *, const char *));
496 extern int cpp_read_file PARAMS ((cpp_reader *, const char *));
501 #endif /* __GCC_CPPLIB__ */