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. */
240 unsigned char warn_stringify;
242 /* Nonzero means turn warnings into errors. */
243 unsigned char warnings_are_errors;
245 /* Nonzero causes output not to be done, but directives such as
246 #define that have side effects are still obeyed. */
247 unsigned char no_output;
249 /* Nonzero means we should look for header.gcc files that remap file
253 /* Nonzero means don't output line number information. */
254 unsigned char no_line_commands;
256 /* Nonzero means -I- has been seen, so don't look for #include "foo"
257 the source-file directory. */
258 unsigned char ignore_srcdir;
260 /* Zero means dollar signs are punctuation. */
261 unsigned char dollars_in_ident;
263 /* Nonzero means try to imitate old fashioned non-ANSI preprocessor. */
264 unsigned char traditional;
266 /* Nonzero means warn if undefined identifiers are evaluated in an #if. */
267 unsigned char warn_undef;
269 /* Nonzero for the 1989 C Standard, including corrigenda and amendments. */
272 /* Nonzero for the 1999 C Standard, including corrigenda and amendments. */
275 /* Nonzero means give all the error messages the ANSI standard requires. */
276 unsigned char pedantic;
278 /* Nonzero means we're looking at already preprocessed code, so don't
279 bother trying to do macro expansion and whatnot. */
280 unsigned char preprocessed;
282 /* Nonzero disables all the standard directories for headers. */
283 unsigned char no_standard_includes;
285 /* Nonzero disables the C++-specific standard directories for headers. */
286 unsigned char no_standard_cplusplus_includes;
288 /* Nonzero means dump macros in some fashion - see above. */
289 unsigned char dump_macros;
291 /* Nonzero means pass all #define and #undef directives which we
292 actually process through to the output stream. This feature is
293 used primarily to allow cc1 to record the #defines and #undefs
294 for the sake of debuggers which understand about preprocessor
295 macros, but it may also be useful with -E to figure out how
296 symbols are defined, and where they are defined. */
297 unsigned char debug_output;
299 /* Nonzero means pass #include lines through to the output. */
300 unsigned char dump_includes;
302 /* Print column number in error messages. */
303 unsigned char show_column;
307 /* A cpp_reader encapsulates the "state" of a pre-processor run.
308 Applying cpp_get_token repeatedly yields a stream of pre-processor
309 tokens. Usually, there is only one cpp_reader object active. */
315 /* A buffer used for both for cpp_get_token's output, and also internally. */
316 unsigned char *token_buffer;
317 /* Allocated size of token_buffer. CPP_RESERVE allocates space. */
318 unsigned int token_buffer_size;
319 /* End of the written part of token_buffer. */
320 unsigned char *limit;
322 /* Error counter for exit code */
325 /* Line where a newline was first seen in a string constant. */
326 int multiline_string_line;
328 /* Current depth in #include directives that use <...>. */
329 int system_include_depth;
331 /* Current depth of buffer stack. */
332 int buffer_stack_depth;
334 /* Hash table of macros and assertions. See cpphash.c */
335 struct htab *hashtab;
337 /* Hash table of other included files. See cppfiles.c */
338 struct htab *all_include_files;
340 /* Chain of `actual directory' file_name_list entries,
342 struct file_name_list *actual_dirs;
344 /* Current maximum length of directory names in the search path
345 for include files. (Altered as we get more of them.) */
346 unsigned int max_include_len;
348 struct if_stack *if_stack;
354 /* Buffer of -M output. */
357 /* A buffer used only by read_and_prescan (in cppfiles.c), which is
358 allocated once per cpp_reader object to keep it off the stack. */
359 unsigned char *input_buffer;
360 size_t input_buffer_len;
362 /* User visible options. */
363 struct cpp_options opts;
365 /* Nonzero means we have printed (while error reporting) a list of
366 containing files that matches the current status. */
367 unsigned char input_stack_listing_current;
369 /* If non-zero, macros are not expanded. */
370 unsigned char no_macro_expand;
372 /* If non-zero, directives cause a hard error. Used when parsing
374 unsigned char no_directives;
376 /* We're printed a warning recommending against using #import. */
377 unsigned char import_warning;
379 /* If true, characters between '<' and '>' are a single (string) token. */
380 unsigned char parsing_include_directive;
382 /* If true, # introduces an assertion (see do_assert) */
383 unsigned char parsing_if_directive;
385 /* If true, # and ## are the STRINGIZE and TOKPASTE operators */
386 unsigned char parsing_define_directive;
388 /* True if escape sequences (as described for has_escapes in
389 parse_buffer) should be emitted. */
390 unsigned char output_escapes;
392 /* 0: Have seen non-white-space on this line.
393 1: Only seen white space so far on this line.
394 2: Only seen white space so far in this file. */
395 unsigned char only_seen_white;
397 /* True after cpp_start_read completes. Used to inhibit some
398 warnings while parsing the command line. */
399 unsigned char done_initializing;
402 #define CPP_FATAL_LIMIT 1000
403 /* True if we have seen a "fatal" error. */
404 #define CPP_FATAL_ERRORS(READER) ((READER)->errors >= CPP_FATAL_LIMIT)
406 /* Macros for manipulating the token_buffer. */
408 /* Number of characters currently in PFILE's output buffer. */
409 #define CPP_WRITTEN(PFILE) ((size_t)((PFILE)->limit - (PFILE)->token_buffer))
410 #define CPP_PWRITTEN(PFILE) ((PFILE)->limit)
411 #define CPP_ADJUST_WRITTEN(PFILE,DELTA) ((PFILE)->limit += (DELTA))
412 #define CPP_SET_WRITTEN(PFILE,N) ((PFILE)->limit = (PFILE)->token_buffer + (N))
414 #define CPP_OPTION(PFILE, OPTION) ((PFILE)->opts.OPTION)
415 #define CPP_BUFFER(PFILE) ((PFILE)->buffer)
417 /* Name under which this program was invoked. */
418 extern const char *progname;
420 extern int cpp_handle_options PARAMS ((cpp_reader *, int, char **));
421 extern enum cpp_token cpp_get_token PARAMS ((cpp_reader *));
422 extern enum cpp_token cpp_get_non_space_token PARAMS ((cpp_reader *));
424 extern void cpp_reader_init PARAMS ((cpp_reader *));
425 extern int cpp_start_read PARAMS ((cpp_reader *, const char *));
426 extern void cpp_finish PARAMS ((cpp_reader *));
427 extern void cpp_cleanup PARAMS ((cpp_reader *PFILE));
429 extern void cpp_buf_line_and_col PARAMS((cpp_buffer *, long *, long *));
430 extern cpp_buffer *cpp_file_buffer PARAMS((cpp_reader *));
431 extern void cpp_define PARAMS ((cpp_reader *, const char *));
432 extern void cpp_assert PARAMS ((cpp_reader *, const char *));
433 extern void cpp_undef PARAMS ((cpp_reader *, const char *));
434 extern void cpp_unassert PARAMS ((cpp_reader *, const char *));
436 /* N.B. The error-message-printer prototypes have not been nicely
437 formatted because exgettext needs to see 'msgid' on the same line
438 as the name of the function in order to work properly. Only the
439 string argument gets a name in an effort to keep the lines from
440 getting ridiculously oversized. */
442 extern void cpp_ice PARAMS ((cpp_reader *, const char *msgid, ...))
444 extern void cpp_fatal PARAMS ((cpp_reader *, const char *msgid, ...))
446 extern void cpp_error PARAMS ((cpp_reader *, const char *msgid, ...))
448 extern void cpp_warning PARAMS ((cpp_reader *, const char *msgid, ...))
450 extern void cpp_pedwarn PARAMS ((cpp_reader *, const char *msgid, ...))
452 extern void cpp_notice PARAMS ((cpp_reader *, const char *msgid, ...))
454 extern void cpp_error_with_line PARAMS ((cpp_reader *, int, int, const char *msgid, ...))
456 extern void cpp_warning_with_line PARAMS ((cpp_reader *, int, int, const char *msgid, ...))
458 extern void cpp_pedwarn_with_line PARAMS ((cpp_reader *, int, int, const char *msgid, ...))
460 extern void cpp_pedwarn_with_file_and_line PARAMS ((cpp_reader *, const char *, int, int, const char *msgid, ...))
462 extern void cpp_error_from_errno PARAMS ((cpp_reader *, const char *));
463 extern void cpp_notice_from_errno PARAMS ((cpp_reader *, const char *));
465 extern cpp_buffer *cpp_push_buffer PARAMS ((cpp_reader *,
466 const unsigned char *, long));
467 extern cpp_buffer *cpp_pop_buffer PARAMS ((cpp_reader *));
468 extern int cpp_defined PARAMS ((cpp_reader *, const unsigned char *, int));
470 extern void cpp_expand_to_buffer PARAMS ((cpp_reader *,
471 const unsigned char *, int));
472 extern void cpp_scan_buffer PARAMS ((cpp_reader *));
475 extern int cpp_included PARAMS ((cpp_reader *, const char *));
476 extern int cpp_read_file PARAMS ((cpp_reader *, const char *));
481 #endif /* __GCC_CPPLIB__ */