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;
41 CPP_VSPACE, /* newlines and #line directives */
50 CPP_ASSERTION, /* #machine(a29k) */
51 CPP_STRINGIZE, /* stringize macro argument */
52 CPP_TOKPASTE, /* paste macro arg with next/prev token */
58 CPP_SEMICOLON, /* ";" */
59 CPP_3DOTS, /* "..." */
60 CPP_POP /* We're about to pop the buffer stack. */
63 typedef int (*parse_cleanup_t) PARAMS((cpp_buffer *, cpp_reader *));
67 const unsigned char *cur; /* current position */
68 const unsigned char *rlimit; /* end of valid data */
69 const unsigned char *buf; /* entire buffer */
70 const unsigned char *line_base; /* start of current line */
71 const unsigned char *mark; /* Saved position for lengthy backtrack. */
73 struct cpp_buffer *prev;
75 /* Filename specified with #line command. */
76 const char *nominal_fname;
77 /* Last filename specified with #line command. */
78 const char *last_nominal_fname;
79 /* Actual directory of this file, used only for "" includes */
80 struct file_name_list *actual_dir;
82 /* Pointer into the include hash table. Used for include_next and
83 to record control macros. */
86 long lineno; /* Line number at CPP_LINE_BASE. */
87 parse_cleanup_t cleanup;
89 /* If the buffer is the expansion of a macro, this points to the
90 macro's hash table entry. */
91 struct hashnode *macro;
93 /* Value of if_stack at start of this file.
94 Used to prohibit unmatched #endif (etc) in an include file. */
95 struct if_stack *if_stack;
97 /* True if this is a header file included using <FILENAME>. */
101 /* True if buffer contains escape sequences.
102 Currently there are two kinds:
103 "\r-" means following identifier should not be macro-expanded.
104 "\r " means a token-separator. This turns into " " in final output
105 if not stringizing and needed to separate tokens; otherwise nothing.
106 Any other two-character sequence beginning with \r is an error.
108 If this is NOT set, then \r is a one-character escape meaning backslash
109 newline. This is guaranteed not to occur in the middle of a token.
110 The two interpretations of \r do not conflict, because the two-character
111 escapes are used only in macro buffers, and backslash-newline is removed
112 from macro expansion text in collect_expansion and/or macarg. */
115 /* Used by the C++ frontend to implement redirected input (such as for
116 default argument and/or template parsing). */
119 /* True if we have already warned about C++ comments in this file.
120 The warning happens only for C89 extended mode with -pedantic on,
121 and only once per file (otherwise it would be far too noisy). */
122 char warned_cplusplus_comments;
125 struct file_name_map_list;
128 /* Maximum nesting of cpp_buffers. We use a static limit, partly for
129 efficiency, and partly to limit runaway recursion. */
130 #define CPP_STACK_MAX 200
132 /* Values for opts.dump_macros.
133 dump_only means inhibit output of the preprocessed text
134 and instead output the definitions of all user-defined
135 macros in a form suitable for use as input to cccp.
136 dump_names means pass #define and the macro name through to output.
137 dump_definitions means pass the whole definition (plus #define) through
139 enum { dump_none = 0, dump_only, dump_names, dump_definitions };
141 /* This structure is nested inside struct cpp_reader, and
142 carries all the options visible to the command line. */
145 /* Name of input and output files. */
146 const char *in_fname;
147 const char *out_fname;
149 /* Pending options - -D, -U, -A, -I, -ixxx. */
150 struct cpp_pending *pending;
152 /* File name which deps are being written to. This is 0 if deps are
153 being written to stdout. */
154 const char *deps_file;
156 /* Target-name to write with the dependency information. */
159 /* Search paths for include files. */
160 struct file_name_list *quote_include; /* First dir to search for "file" */
161 struct file_name_list *bracket_include;/* First dir to search for <file> */
163 /* Map between header names and file names, used only on DOS where
164 file names are limited in length. */
165 struct file_name_map_list *map_list;
167 /* Directory prefix that should replace `/usr/lib/gcc-lib/TARGET/VERSION'
168 in the standard include file directories. */
169 const char *include_prefix;
170 unsigned int include_prefix_len;
172 /* Non-0 means -v, so print the full set of include dirs. */
173 unsigned char verbose;
175 /* Nonzero means use extra default include directories for C++. */
176 unsigned char cplusplus;
178 /* Nonzero means handle cplusplus style comments */
179 unsigned char cplusplus_comments;
181 /* Nonzero means handle #import, for objective C. */
184 /* Nonzero means this is an assembly file, so ignore unrecognized
185 directives and the "# 33" form of #line, both of which are
186 probably comments. Also, permit unbalanced ' strings (again,
187 likely to be in comments). */
188 unsigned char lang_asm;
190 /* Nonzero means this is Fortran, and we don't know where the
191 comments are, so permit unbalanced ' strings. Unlike lang_asm,
192 this does not ignore unrecognized directives. */
193 unsigned char lang_fortran;
195 /* Nonzero means handle CHILL comment syntax and output CHILL string
196 delimiters for __DATE__ etc. */
199 /* Nonzero means don't copy comments into the output file. */
200 unsigned char discard_comments;
202 /* Nonzero means process the ANSI trigraph sequences. */
203 unsigned char trigraphs;
205 /* Nonzero means print the names of included files rather than the
206 preprocessed output. 1 means just the #include "...", 2 means
207 #include <...> as well. */
208 unsigned char print_deps;
210 /* Nonzero if missing .h files in -M output are assumed to be
211 generated files and not errors. */
212 unsigned char print_deps_missing_files;
214 /* If true, fopen (deps_file, "a") else fopen (deps_file, "w"). */
215 unsigned char print_deps_append;
217 /* Nonzero means print names of header files (-H). */
218 unsigned char print_include_names;
220 /* Nonzero means cpp_pedwarn causes a hard error. */
221 unsigned char pedantic_errors;
223 /* Nonzero means don't print warning messages. */
224 unsigned char inhibit_warnings;
226 /* Nonzero means don't print error messages. Has no option to
227 select it, but can be set by a user of cpplib (e.g. fix-header). */
228 unsigned char inhibit_errors;
230 /* Nonzero means warn if slash-star appears in a comment. */
231 unsigned char warn_comments;
233 /* Nonzero means warn if there are any trigraphs. */
234 unsigned char warn_trigraphs;
236 /* Nonzero means warn if #import is used. */
237 unsigned char warn_import;
239 /* Nonzero means warn if a macro argument is (or would be)
240 stringified with -traditional, and warn about directives
241 with the # indented from the beginning of the line. */
242 unsigned char warn_traditional;
244 /* Nonzero means turn warnings into errors. */
245 unsigned char warnings_are_errors;
247 /* Nonzero causes output not to be done, but directives such as
248 #define that have side effects are still obeyed. */
249 unsigned char no_output;
251 /* Nonzero means we should look for header.gcc files that remap file
255 /* Nonzero means don't output line number information. */
256 unsigned char no_line_commands;
258 /* Nonzero means -I- has been seen, so don't look for #include "foo"
259 the source-file directory. */
260 unsigned char ignore_srcdir;
262 /* Zero means dollar signs are punctuation. */
263 unsigned char dollars_in_ident;
265 /* Nonzero means try to imitate old fashioned non-ANSI preprocessor. */
266 unsigned char traditional;
268 /* Nonzero means warn if undefined identifiers are evaluated in an #if. */
269 unsigned char warn_undef;
271 /* Nonzero for the 1989 C Standard, including corrigenda and amendments. */
274 /* Nonzero for the 1999 C Standard, including corrigenda and amendments. */
277 /* Nonzero means give all the error messages the ANSI standard requires. */
278 unsigned char pedantic;
280 /* Nonzero means we're looking at already preprocessed code, so don't
281 bother trying to do macro expansion and whatnot. */
282 unsigned char preprocessed;
284 /* Nonzero disables all the standard directories for headers. */
285 unsigned char no_standard_includes;
287 /* Nonzero disables the C++-specific standard directories for headers. */
288 unsigned char no_standard_cplusplus_includes;
290 /* Nonzero means dump macros in some fashion - see above. */
291 unsigned char dump_macros;
293 /* Nonzero means pass all #define and #undef directives which we
294 actually process through to the output stream. This feature is
295 used primarily to allow cc1 to record the #defines and #undefs
296 for the sake of debuggers which understand about preprocessor
297 macros, but it may also be useful with -E to figure out how
298 symbols are defined, and where they are defined. */
299 unsigned char debug_output;
301 /* Nonzero means pass #include lines through to the output. */
302 unsigned char dump_includes;
304 /* Print column number in error messages. */
305 unsigned char show_column;
309 /* A cpp_reader encapsulates the "state" of a pre-processor run.
310 Applying cpp_get_token repeatedly yields a stream of pre-processor
311 tokens. Usually, there is only one cpp_reader object active. */
317 /* A buffer used for both for cpp_get_token's output, and also internally. */
318 unsigned char *token_buffer;
319 /* Allocated size of token_buffer. CPP_RESERVE allocates space. */
320 unsigned int token_buffer_size;
321 /* End of the written part of token_buffer. */
322 unsigned char *limit;
324 /* Error counter for exit code */
327 /* Line where a newline was first seen in a string constant. */
328 int multiline_string_line;
330 /* Current depth in #include directives that use <...>. */
331 int system_include_depth;
333 /* Current depth of buffer stack. */
334 int buffer_stack_depth;
336 /* Hash table of macros and assertions. See cpphash.c */
337 struct htab *hashtab;
339 /* Hash table of other included files. See cppfiles.c */
340 struct htab *all_include_files;
342 /* Chain of `actual directory' file_name_list entries,
344 struct file_name_list *actual_dirs;
346 /* Current maximum length of directory names in the search path
347 for include files. (Altered as we get more of them.) */
348 unsigned int max_include_len;
350 struct if_stack *if_stack;
351 const unsigned char *potential_control_macro;
357 /* Buffer of -M output. */
360 /* A buffer used only by read_and_prescan (in cppfiles.c), which is
361 allocated once per cpp_reader object to keep it off the stack. */
362 unsigned char *input_buffer;
363 size_t input_buffer_len;
365 /* User visible options. */
366 struct cpp_options opts;
368 /* Nonzero means we have printed (while error reporting) a list of
369 containing files that matches the current status. */
370 unsigned char input_stack_listing_current;
372 /* If non-zero, macros are not expanded. */
373 unsigned char no_macro_expand;
375 /* If non-zero, directives cause a hard error. Used when parsing
377 unsigned char no_directives;
379 /* We're printed a warning recommending against using #import. */
380 unsigned char import_warning;
382 /* If true, characters between '<' and '>' are a single (string) token. */
383 unsigned char parsing_include_directive;
385 /* If true, # introduces an assertion (see do_assert) */
386 unsigned char parsing_if_directive;
388 /* If true, # and ## are the STRINGIZE and TOKPASTE operators */
389 unsigned char parsing_define_directive;
391 /* True if escape sequences (as described for has_escapes in
392 parse_buffer) should be emitted. */
393 unsigned char output_escapes;
395 /* 0: Have seen non-white-space on this line.
396 1: Only seen white space so far on this line.
397 2: Only seen white space so far in this file. */
398 unsigned char only_seen_white;
400 /* True after cpp_start_read completes. Used to inhibit some
401 warnings while parsing the command line. */
402 unsigned char done_initializing;
405 #define CPP_FATAL_LIMIT 1000
406 /* True if we have seen a "fatal" error. */
407 #define CPP_FATAL_ERRORS(READER) ((READER)->errors >= CPP_FATAL_LIMIT)
409 /* Macros for manipulating the token_buffer. */
411 /* Number of characters currently in PFILE's output buffer. */
412 #define CPP_WRITTEN(PFILE) ((size_t)((PFILE)->limit - (PFILE)->token_buffer))
413 #define CPP_PWRITTEN(PFILE) ((PFILE)->limit)
414 #define CPP_ADJUST_WRITTEN(PFILE,DELTA) ((PFILE)->limit += (DELTA))
415 #define CPP_SET_WRITTEN(PFILE,N) ((PFILE)->limit = (PFILE)->token_buffer + (N))
417 #define CPP_OPTION(PFILE, OPTION) ((PFILE)->opts.OPTION)
418 #define CPP_BUFFER(PFILE) ((PFILE)->buffer)
420 /* Name under which this program was invoked. */
421 extern const char *progname;
423 extern int cpp_handle_options PARAMS ((cpp_reader *, int, char **));
424 extern enum cpp_token cpp_get_token PARAMS ((cpp_reader *));
425 extern enum cpp_token cpp_get_non_space_token PARAMS ((cpp_reader *));
427 extern void cpp_reader_init PARAMS ((cpp_reader *));
428 extern int cpp_start_read PARAMS ((cpp_reader *, const char *));
429 extern void cpp_finish PARAMS ((cpp_reader *));
430 extern void cpp_cleanup PARAMS ((cpp_reader *PFILE));
432 extern void cpp_buf_line_and_col PARAMS((cpp_buffer *, long *, long *));
433 extern cpp_buffer *cpp_file_buffer PARAMS((cpp_reader *));
434 extern void cpp_define PARAMS ((cpp_reader *, const char *));
435 extern void cpp_assert PARAMS ((cpp_reader *, const char *));
436 extern void cpp_undef PARAMS ((cpp_reader *, const char *));
437 extern void cpp_unassert PARAMS ((cpp_reader *, const char *));
439 /* N.B. The error-message-printer prototypes have not been nicely
440 formatted because exgettext needs to see 'msgid' on the same line
441 as the name of the function in order to work properly. Only the
442 string argument gets a name in an effort to keep the lines from
443 getting ridiculously oversized. */
445 extern void cpp_ice PARAMS ((cpp_reader *, const char *msgid, ...))
447 extern void cpp_fatal PARAMS ((cpp_reader *, const char *msgid, ...))
449 extern void cpp_error PARAMS ((cpp_reader *, const char *msgid, ...))
451 extern void cpp_warning PARAMS ((cpp_reader *, const char *msgid, ...))
453 extern void cpp_pedwarn PARAMS ((cpp_reader *, const char *msgid, ...))
455 extern void cpp_notice PARAMS ((cpp_reader *, const char *msgid, ...))
457 extern void cpp_error_with_line PARAMS ((cpp_reader *, int, int, const char *msgid, ...))
459 extern void cpp_warning_with_line PARAMS ((cpp_reader *, int, int, const char *msgid, ...))
461 extern void cpp_pedwarn_with_line PARAMS ((cpp_reader *, int, int, const char *msgid, ...))
463 extern void cpp_pedwarn_with_file_and_line PARAMS ((cpp_reader *, const char *, int, int, const char *msgid, ...))
465 extern void cpp_error_from_errno PARAMS ((cpp_reader *, const char *));
466 extern void cpp_notice_from_errno PARAMS ((cpp_reader *, const char *));
468 extern cpp_buffer *cpp_push_buffer PARAMS ((cpp_reader *,
469 const unsigned char *, long));
470 extern cpp_buffer *cpp_pop_buffer PARAMS ((cpp_reader *));
471 extern int cpp_defined PARAMS ((cpp_reader *, const unsigned char *, int));
473 extern void cpp_expand_to_buffer PARAMS ((cpp_reader *,
474 const unsigned char *, int));
475 extern void cpp_scan_buffer PARAMS ((cpp_reader *));
478 extern int cpp_included PARAMS ((cpp_reader *, const char *));
479 extern int cpp_read_file PARAMS ((cpp_reader *, const char *));
484 #endif /* __GCC_CPPLIB__ */