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 *alimit; /* end of allocated buffer */
71 const unsigned char *line_base; /* start of current line */
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 long colno; /* Column number at CPP_LINE_BASE. */
88 long mark; /* Saved position for lengthy backtrack. */
89 parse_cleanup_t cleanup;
92 /* Value of if_stack at start of this file.
93 Used to prohibit unmatched #endif (etc) in an include file. */
94 struct if_stack *if_stack;
96 /* True if this is a header file included using <FILENAME>. */
100 /* True if buffer contains escape sequences.
101 Currently there are two kinds:
102 "\r-" means following identifier should not be macro-expanded.
103 "\r " means a token-separator. This turns into " " in final output
104 if not stringizing and needed to separate tokens; otherwise nothing.
105 Any other two-character sequence beginning with \r is an error.
107 If this is NOT set, then \r is a one-character escape meaning backslash
108 newline. This is guaranteed not to occur in the middle of a token.
109 The two interpretations of \r do not conflict, because the two-character
110 escapes are used only in macro buffers, and backslash-newline is removed
111 from macro expansion text in collect_expansion and/or macarg. */
114 /* Used by the C++ frontend to implement redirected input (such as for
115 default argument and/or template parsing). */
118 /* True if we have already warned about C++ comments in this file.
119 The warning happens only for C89 extended mode with -pedantic on,
120 and only once per file (otherwise it would be far too noisy). */
121 char warned_cplusplus_comments;
124 struct file_name_map_list;
127 /* Maximum nesting of cpp_buffers. We use a static limit, partly for
128 efficiency, and partly to limit runaway recursion. */
129 #define CPP_STACK_MAX 200
131 /* Values for opts.dump_macros.
132 dump_only means inhibit output of the preprocessed text
133 and instead output the definitions of all user-defined
134 macros in a form suitable for use as input to cccp.
135 dump_names means pass #define and the macro name through to output.
136 dump_definitions means pass the whole definition (plus #define) through
138 enum { dump_none = 0, dump_only, dump_names, dump_definitions };
140 /* This structure is nested inside struct cpp_reader, and
141 carries all the options visible to the command line. */
144 /* Name of input and output files. */
145 const char *in_fname;
146 const char *out_fname;
148 /* Pending options - -D, -U, -A, -I, -ixxx. */
149 struct cpp_pending *pending;
151 /* File name which deps are being written to. This is 0 if deps are
152 being written to stdout. */
153 const char *deps_file;
155 /* Target-name to write with the dependency information. */
158 /* Search paths for include files. */
159 struct file_name_list *quote_include; /* First dir to search for "file" */
160 struct file_name_list *bracket_include;/* First dir to search for <file> */
162 /* Map between header names and file names, used only on DOS where
163 file names are limited in length. */
164 struct file_name_map_list *map_list;
166 /* Directory prefix that should replace `/usr/lib/gcc-lib/TARGET/VERSION'
167 in the standard include file directories. */
168 const char *include_prefix;
169 unsigned int include_prefix_len;
171 /* Non-0 means -v, so print the full set of include dirs. */
172 unsigned char verbose;
174 /* Nonzero means use extra default include directories for C++. */
175 unsigned char cplusplus;
177 /* Nonzero means handle cplusplus style comments */
178 unsigned char cplusplus_comments;
180 /* Nonzero means handle #import, for objective C. */
183 /* Nonzero means this is an assembly file, so ignore unrecognized
184 directives and the "# 33" form of #line, both of which are
185 probably comments. Also, permit unbalanced ' strings (again,
186 likely to be in comments). */
187 unsigned char lang_asm;
189 /* Nonzero means this is Fortran, and we don't know where the
190 comments are, so permit unbalanced ' strings. Unlike lang_asm,
191 this does not ignore unrecognized directives. */
192 unsigned char lang_fortran;
194 /* Nonzero means handle CHILL comment syntax and output CHILL string
195 delimiters for __DATE__ etc. */
198 /* Nonzero means don't copy comments into the output file. */
199 unsigned char discard_comments;
201 /* Nonzero means process the ANSI trigraph sequences. */
202 unsigned char trigraphs;
204 /* Nonzero means print the names of included files rather than the
205 preprocessed output. 1 means just the #include "...", 2 means
206 #include <...> as well. */
207 unsigned char print_deps;
209 /* Nonzero if missing .h files in -M output are assumed to be
210 generated files and not errors. */
211 unsigned char print_deps_missing_files;
213 /* If true, fopen (deps_file, "a") else fopen (deps_file, "w"). */
214 unsigned char print_deps_append;
216 /* Nonzero means print names of header files (-H). */
217 unsigned char print_include_names;
219 /* Nonzero means cpp_pedwarn causes a hard error. */
220 unsigned char pedantic_errors;
222 /* Nonzero means don't print warning messages. */
223 unsigned char inhibit_warnings;
225 /* Nonzero means don't print error messages. Has no option to
226 select it, but can be set by a user of cpplib (e.g. fix-header). */
227 unsigned char inhibit_errors;
229 /* Nonzero means warn if slash-star appears in a comment. */
230 unsigned char warn_comments;
232 /* Nonzero means warn if there are any trigraphs. */
233 unsigned char warn_trigraphs;
235 /* Nonzero means warn if #import is used. */
236 unsigned char warn_import;
238 /* Nonzero means warn if a macro argument is (or would be)
239 stringified with -traditional, and warn about directives
240 with the # indented from the beginning of the line. */
241 unsigned char warn_traditional;
243 /* Nonzero means turn warnings into errors. */
244 unsigned char warnings_are_errors;
246 /* Nonzero causes output not to be done, but directives such as
247 #define that have side effects are still obeyed. */
248 unsigned char no_output;
250 /* Nonzero means we should look for header.gcc files that remap file
254 /* Nonzero means don't output line number information. */
255 unsigned char no_line_commands;
257 /* Nonzero means -I- has been seen, so don't look for #include "foo"
258 the source-file directory. */
259 unsigned char ignore_srcdir;
261 /* Zero means dollar signs are punctuation. */
262 unsigned char dollars_in_ident;
264 /* Nonzero means try to imitate old fashioned non-ANSI preprocessor. */
265 unsigned char traditional;
267 /* Nonzero means warn if undefined identifiers are evaluated in an #if. */
268 unsigned char warn_undef;
270 /* Nonzero for the 1989 C Standard, including corrigenda and amendments. */
273 /* Nonzero for the 1999 C Standard, including corrigenda and amendments. */
276 /* Nonzero means give all the error messages the ANSI standard requires. */
277 unsigned char pedantic;
279 /* Nonzero means we're looking at already preprocessed code, so don't
280 bother trying to do macro expansion and whatnot. */
281 unsigned char preprocessed;
283 /* Nonzero disables all the standard directories for headers. */
284 unsigned char no_standard_includes;
286 /* Nonzero disables the C++-specific standard directories for headers. */
287 unsigned char no_standard_cplusplus_includes;
289 /* Nonzero means dump macros in some fashion - see above. */
290 unsigned char dump_macros;
292 /* Nonzero means pass all #define and #undef directives which we
293 actually process through to the output stream. This feature is
294 used primarily to allow cc1 to record the #defines and #undefs
295 for the sake of debuggers which understand about preprocessor
296 macros, but it may also be useful with -E to figure out how
297 symbols are defined, and where they are defined. */
298 unsigned char debug_output;
300 /* Nonzero means pass #include lines through to the output. */
301 unsigned char dump_includes;
303 /* Print column number in error messages. */
304 unsigned char show_column;
308 /* A cpp_reader encapsulates the "state" of a pre-processor run.
309 Applying cpp_get_token repeatedly yields a stream of pre-processor
310 tokens. Usually, there is only one cpp_reader object active. */
316 /* A buffer used for both for cpp_get_token's output, and also internally. */
317 unsigned char *token_buffer;
318 /* Allocated size of token_buffer. CPP_RESERVE allocates space. */
319 unsigned int token_buffer_size;
320 /* End of the written part of token_buffer. */
321 unsigned char *limit;
323 /* Error counter for exit code */
326 /* Line where a newline was first seen in a string constant. */
327 int multiline_string_line;
329 /* Current depth in #include directives that use <...>. */
330 int system_include_depth;
332 /* Current depth of buffer stack. */
333 int buffer_stack_depth;
335 /* Hash table of macros and assertions. See cpphash.c */
336 struct htab *hashtab;
338 /* Hash table of other included files. See cppfiles.c */
339 struct htab *all_include_files;
341 /* Chain of `actual directory' file_name_list entries,
343 struct file_name_list *actual_dirs;
345 /* Current maximum length of directory names in the search path
346 for include files. (Altered as we get more of them.) */
347 unsigned int max_include_len;
349 struct if_stack *if_stack;
355 /* Buffer of -M output. */
358 /* A buffer used only by read_and_prescan (in cppfiles.c), which is
359 allocated once per cpp_reader object to keep it off the stack. */
360 unsigned char *input_buffer;
361 size_t input_buffer_len;
363 /* User visible options. */
364 struct cpp_options opts;
366 /* Nonzero means we have printed (while error reporting) a list of
367 containing files that matches the current status. */
368 unsigned char input_stack_listing_current;
370 /* If non-zero, macros are not expanded. */
371 unsigned char no_macro_expand;
373 /* If non-zero, directives cause a hard error. Used when parsing
375 unsigned char no_directives;
377 /* We're printed a warning recommending against using #import. */
378 unsigned char import_warning;
380 /* If true, characters between '<' and '>' are a single (string) token. */
381 unsigned char parsing_include_directive;
383 /* If true, # introduces an assertion (see do_assert) */
384 unsigned char parsing_if_directive;
386 /* If true, # and ## are the STRINGIZE and TOKPASTE operators */
387 unsigned char parsing_define_directive;
389 /* True if escape sequences (as described for has_escapes in
390 parse_buffer) should be emitted. */
391 unsigned char output_escapes;
393 /* 0: Have seen non-white-space on this line.
394 1: Only seen white space so far on this line.
395 2: Only seen white space so far in this file. */
396 unsigned char only_seen_white;
398 /* True after cpp_start_read completes. Used to inhibit some
399 warnings while parsing the command line. */
400 unsigned char done_initializing;
403 #define CPP_FATAL_LIMIT 1000
404 /* True if we have seen a "fatal" error. */
405 #define CPP_FATAL_ERRORS(READER) ((READER)->errors >= CPP_FATAL_LIMIT)
407 /* Macros for manipulating the token_buffer. */
409 /* Number of characters currently in PFILE's output buffer. */
410 #define CPP_WRITTEN(PFILE) ((size_t)((PFILE)->limit - (PFILE)->token_buffer))
411 #define CPP_PWRITTEN(PFILE) ((PFILE)->limit)
412 #define CPP_ADJUST_WRITTEN(PFILE,DELTA) ((PFILE)->limit += (DELTA))
413 #define CPP_SET_WRITTEN(PFILE,N) ((PFILE)->limit = (PFILE)->token_buffer + (N))
415 #define CPP_OPTION(PFILE, OPTION) ((PFILE)->opts.OPTION)
416 #define CPP_BUFFER(PFILE) ((PFILE)->buffer)
418 /* Name under which this program was invoked. */
419 extern const char *progname;
421 extern int cpp_handle_options PARAMS ((cpp_reader *, int, char **));
422 extern enum cpp_token cpp_get_token PARAMS ((cpp_reader *));
423 extern enum cpp_token cpp_get_non_space_token PARAMS ((cpp_reader *));
425 extern void cpp_reader_init PARAMS ((cpp_reader *));
426 extern int cpp_start_read PARAMS ((cpp_reader *, const char *));
427 extern void cpp_finish PARAMS ((cpp_reader *));
428 extern void cpp_cleanup PARAMS ((cpp_reader *PFILE));
430 extern void cpp_buf_line_and_col PARAMS((cpp_buffer *, long *, long *));
431 extern cpp_buffer *cpp_file_buffer PARAMS((cpp_reader *));
432 extern void cpp_define PARAMS ((cpp_reader *, const char *));
433 extern void cpp_assert PARAMS ((cpp_reader *, const char *));
434 extern void cpp_undef PARAMS ((cpp_reader *, const char *));
435 extern void cpp_unassert PARAMS ((cpp_reader *, const char *));
437 /* N.B. The error-message-printer prototypes have not been nicely
438 formatted because exgettext needs to see 'msgid' on the same line
439 as the name of the function in order to work properly. Only the
440 string argument gets a name in an effort to keep the lines from
441 getting ridiculously oversized. */
443 extern void cpp_ice PARAMS ((cpp_reader *, const char *msgid, ...))
445 extern void cpp_fatal PARAMS ((cpp_reader *, const char *msgid, ...))
447 extern void cpp_error PARAMS ((cpp_reader *, const char *msgid, ...))
449 extern void cpp_warning PARAMS ((cpp_reader *, const char *msgid, ...))
451 extern void cpp_pedwarn PARAMS ((cpp_reader *, const char *msgid, ...))
453 extern void cpp_notice PARAMS ((cpp_reader *, const char *msgid, ...))
455 extern void cpp_error_with_line PARAMS ((cpp_reader *, int, int, const char *msgid, ...))
457 extern void cpp_warning_with_line PARAMS ((cpp_reader *, int, int, const char *msgid, ...))
459 extern void cpp_pedwarn_with_line PARAMS ((cpp_reader *, int, int, const char *msgid, ...))
461 extern void cpp_pedwarn_with_file_and_line PARAMS ((cpp_reader *, const char *, int, int, const char *msgid, ...))
463 extern void cpp_error_from_errno PARAMS ((cpp_reader *, const char *));
464 extern void cpp_notice_from_errno PARAMS ((cpp_reader *, const char *));
466 extern cpp_buffer *cpp_push_buffer PARAMS ((cpp_reader *,
467 const unsigned char *, long));
468 extern cpp_buffer *cpp_pop_buffer PARAMS ((cpp_reader *));
469 extern int cpp_defined PARAMS ((cpp_reader *, const unsigned char *, int));
471 extern void cpp_expand_to_buffer PARAMS ((cpp_reader *,
472 const unsigned char *, int));
473 extern void cpp_scan_buffer PARAMS ((cpp_reader *));
476 extern int cpp_included PARAMS ((cpp_reader *, const char *));
477 extern int cpp_read_file PARAMS ((cpp_reader *, const char *));
482 #endif /* __GCC_CPPLIB__ */