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[gcc.git] / gcc / cpplib.h
1 /* Definitions for CPP library.
2 Copyright (C) 1995, 96-98, 1999 Free Software Foundation, Inc.
3 Written by Per Bothner, 1994-95.
4
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
8 later version.
9
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.
14
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.
18
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__
24
25 #include <sys/types.h>
26
27 #ifdef __cplusplus
28 extern "C" {
29 #endif
30
31 typedef unsigned char U_CHAR;
32
33 typedef struct cpp_reader cpp_reader;
34 typedef struct cpp_buffer cpp_buffer;
35 typedef struct cpp_options cpp_options;
36 typedef struct hashnode cpp_hashnode;
37
38 enum cpp_token {
39 CPP_EOF = -1,
40 CPP_OTHER = 0,
41 CPP_COMMENT = 1,
42 CPP_HSPACE,
43 CPP_VSPACE, /* newlines and #line directives */
44 CPP_NAME,
45 CPP_NUMBER,
46 CPP_CHAR,
47 CPP_STRING,
48 CPP_DIRECTIVE,
49 CPP_LPAREN, /* "(" */
50 CPP_RPAREN, /* ")" */
51 CPP_LBRACE, /* "{" */
52 CPP_RBRACE, /* "}" */
53 CPP_COMMA, /* "," */
54 CPP_SEMICOLON,/* ";" */
55 CPP_3DOTS, /* "..." */
56 #if 0
57 CPP_ANDAND, /* "&&" */
58 CPP_OROR, /* "||" */
59 CPP_LSH, /* "<<" */
60 CPP_RSH, /* ">>" */
61 CPP_EQL, /* "==" */
62 CPP_NEQ, /* "!=" */
63 CPP_LEQ, /* "<=" */
64 CPP_GEQ, /* ">=" */
65 CPP_PLPL, /* "++" */
66 CPP_MINMIN, /* "--" */
67 #endif
68 /* POP_TOKEN is returned when we've popped a cpp_buffer. */
69 CPP_POP
70 };
71
72 typedef enum cpp_token (*parse_underflow_t) PARAMS((cpp_reader *));
73 typedef int (*parse_cleanup_t) PARAMS((cpp_buffer *, cpp_reader *));
74
75 /* A parse_marker indicates a previous position,
76 which we can backtrack to. */
77
78 struct parse_marker {
79 cpp_buffer *buf;
80 struct parse_marker *next;
81 int position;
82 };
83
84 extern void parse_set_mark PARAMS ((struct parse_marker *, cpp_reader *));
85 extern void parse_clear_mark PARAMS ((struct parse_marker *));
86 extern void parse_goto_mark PARAMS((struct parse_marker *, cpp_reader *));
87 extern void parse_move_mark PARAMS((struct parse_marker *, cpp_reader *));
88
89 extern int cpp_handle_option PARAMS ((cpp_reader *, int, char **));
90 extern int cpp_handle_options PARAMS ((cpp_reader *, int, char **));
91 extern enum cpp_token cpp_get_token PARAMS ((cpp_reader *));
92 extern void cpp_skip_hspace PARAMS((cpp_reader *));
93 extern enum cpp_token cpp_get_non_space_token PARAMS ((cpp_reader *));
94
95 /* This frees resources used by PFILE. */
96 extern void cpp_cleanup PARAMS ((cpp_reader *PFILE));
97
98 /* If we have a huge buffer, may need to cache more recent counts */
99 #define CPP_LINE_BASE(BUF) ((BUF)->buf + (BUF)->line_base)
100
101 struct cpp_buffer {
102 unsigned char *buf;
103 unsigned char *cur;
104 unsigned char *rlimit; /* end of valid data */
105 unsigned char *alimit; /* end of allocated buffer */
106 unsigned char *prev; /* start of current token */
107
108 char *fname;
109 /* Filename specified with #line command. */
110 char *nominal_fname;
111 /* Actual directory of this file, used only for "" includes */
112 struct file_name_list *actual_dir;
113
114 /* Pointer into the include hash table. Used for include_next and
115 to record control macros.
116 ->fname is an alias to ->ihash->fname. */
117 struct include_hash *ihash;
118
119 long line_base;
120 long lineno; /* Line number at CPP_LINE_BASE. */
121 long colno; /* Column number at CPP_LINE_BASE. */
122 parse_underflow_t underflow;
123 parse_cleanup_t cleanup;
124 void *data;
125 struct parse_marker *marks;
126 /* Value of if_stack at start of this file.
127 Used to prohibit unmatched #endif (etc) in an include file. */
128 struct if_stack *if_stack;
129
130 /* True if this is a header file included using <FILENAME>. */
131 char system_header_p;
132 char seen_eof;
133
134 /* True if buffer contains escape sequences.
135 Currently there are three kinds:
136 "@-" means following identifier should not be macro-expanded.
137 "@ " means a token-separator. This turns into " " in final output
138 if not stringizing and needed to separate tokens; otherwise nothing.
139 "@@" means a normal '@'.
140 (An '@' inside a string stands for itself and is never an escape.) */
141 char has_escapes;
142 };
143
144 struct cpp_pending; /* Forward declaration - for C++. */
145 struct file_name_map_list;
146
147 /* Maximum nesting of cpp_buffers. We use a static limit, partly for
148 efficiency, and partly to limit runaway recursion. */
149 #define CPP_STACK_MAX 200
150
151 /* A cpp_reader encapsulates the "state" of a pre-processor run.
152 Applying cpp_get_token repeatedly yields a stream of pre-processor
153 tokens. Usually, there is only one cpp_reader object active. */
154
155 struct cpp_reader
156 {
157 parse_underflow_t get_token;
158 cpp_buffer *buffer;
159 cpp_options *opts;
160
161 /* A buffer used for both for cpp_get_token's output, and also internally. */
162 unsigned char *token_buffer;
163 /* Allocated size of token_buffer. CPP_RESERVE allocates space. */
164 unsigned int token_buffer_size;
165 /* End of the written part of token_buffer. */
166 unsigned char *limit;
167
168 /* Error counter for exit code */
169 int errors;
170
171 /* Line where a newline was first seen in a string constant. */
172 int multiline_string_line;
173
174 /* Current depth in #include directives that use <...>. */
175 int system_include_depth;
176
177 /* Hash table of other included files. See cppfiles.c */
178 #define ALL_INCLUDE_HASHSIZE 71
179 struct include_hash *all_include_files[ALL_INCLUDE_HASHSIZE];
180
181 /* Chain of `actual directory' file_name_list entries,
182 for "" inclusion. */
183 struct file_name_list *actual_dirs;
184
185 /* Current maximum length of directory names in the search path
186 for include files. (Altered as we get more of them.) */
187 unsigned int max_include_len;
188
189 struct if_stack *if_stack;
190
191 /* Nonzero means we are inside an IF during a -pcp run. In this mode
192 macro expansion is done, and preconditions are output for all macro
193 uses requiring them. */
194 char pcp_inside_if;
195
196 /* Nonzero means we have printed (while error reporting) a list of
197 containing files that matches the current status. */
198 char input_stack_listing_current;
199
200 /* If non-zero, macros are not expanded. */
201 char no_macro_expand;
202
203 /* Print column number in error messages. */
204 char show_column;
205
206 /* We're printed a warning recommending against using #import. */
207 char import_warning;
208
209 /* If true, character between '<' and '>' are a single (string) token. */
210 char parsing_include_directive;
211
212 /* True if escape sequences (as described for has_escapes in
213 parse_buffer) should be emitted. */
214 char output_escapes;
215
216 /* 0: Have seen non-white-space on this line.
217 1: Only seen white space so far on this line.
218 2: Only seen white space so far in this file. */
219 char only_seen_white;
220
221 /* Nonzero means this file was included with a -imacros or -include
222 command line and should not be recorded as an include file. */
223
224 int no_record_file;
225
226 long lineno;
227
228 struct tm *timebuf;
229
230 /* Buffer of -M output. */
231 char *deps_buffer;
232
233 /* Number of bytes allocated in above. */
234 int deps_allocated_size;
235
236 /* Number of bytes used. */
237 int deps_size;
238
239 /* Number of bytes since the last newline. */
240 int deps_column;
241
242 #ifdef __cplusplus
243 ~cpp_reader () { cpp_cleanup (this); }
244 #endif
245
246 cpp_buffer buffer_stack[CPP_STACK_MAX];
247 };
248
249 #define CPP_FATAL_LIMIT 1000
250 /* True if we have seen a "fatal" error. */
251 #define CPP_FATAL_ERRORS(READER) ((READER)->errors >= CPP_FATAL_LIMIT)
252
253 #define CPP_BUF_PEEK(BUFFER) \
254 ((BUFFER)->cur < (BUFFER)->rlimit ? *(BUFFER)->cur : EOF)
255 #define CPP_BUF_GET(BUFFER) \
256 ((BUFFER)->cur < (BUFFER)->rlimit ? *(BUFFER)->cur++ : EOF)
257 #define CPP_FORWARD(BUFFER, N) ((BUFFER)->cur += (N))
258
259 /* Macros for manipulating the token_buffer. */
260
261 #define CPP_OUT_BUFFER(PFILE) ((PFILE)->token_buffer)
262
263 /* Number of characters currently in PFILE's output buffer. */
264 #define CPP_WRITTEN(PFILE) ((size_t)((PFILE)->limit - (PFILE)->token_buffer))
265 #define CPP_PWRITTEN(PFILE) ((PFILE)->limit)
266
267 /* Make sure PFILE->token_buffer has space for at least N more characters. */
268 #define CPP_RESERVE(PFILE, N) \
269 (CPP_WRITTEN (PFILE) + (size_t)(N) > (PFILE)->token_buffer_size \
270 && (cpp_grow_buffer (PFILE, N), 0))
271
272 /* Append string STR (of length N) to PFILE's output buffer.
273 Assume there is enough space. */
274 #define CPP_PUTS_Q(PFILE, STR, N) \
275 (bcopy (STR, (PFILE)->limit, (N)), (PFILE)->limit += (N))
276 /* Append string STR (of length N) to PFILE's output buffer. Make space. */
277 #define CPP_PUTS(PFILE, STR, N) CPP_RESERVE(PFILE, N), CPP_PUTS_Q(PFILE, STR,N)
278 /* Append character CH to PFILE's output buffer. Assume sufficient space. */
279 #define CPP_PUTC_Q(PFILE, CH) (*(PFILE)->limit++ = (CH))
280 /* Append character CH to PFILE's output buffer. Make space if need be. */
281 #define CPP_PUTC(PFILE, CH) (CPP_RESERVE (PFILE, 1), CPP_PUTC_Q (PFILE, CH))
282 /* Make sure PFILE->limit is followed by '\0'. */
283 #define CPP_NUL_TERMINATE_Q(PFILE) (*(PFILE)->limit = 0)
284 #define CPP_NUL_TERMINATE(PFILE) (CPP_RESERVE(PFILE, 1), *(PFILE)->limit = 0)
285 #define CPP_ADJUST_WRITTEN(PFILE,DELTA) ((PFILE)->limit += (DELTA))
286 #define CPP_SET_WRITTEN(PFILE,N) ((PFILE)->limit = (PFILE)->token_buffer + (N))
287
288 #define CPP_OPTIONS(PFILE) ((PFILE)->opts)
289
290 #define CPP_BUFFER(PFILE) ((PFILE)->buffer)
291 #define CPP_PREV_BUFFER(BUFFER) ((BUFFER)+1)
292 /* The bottom of the buffer stack. */
293 #define CPP_NULL_BUFFER(PFILE) (&(PFILE)->buffer_stack[CPP_STACK_MAX])
294
295 /* Pointed to by cpp_reader.opts. */
296 struct cpp_options {
297 char *in_fname;
298
299 /* Name of output file, for error messages. */
300 char *out_fname;
301
302 struct file_name_map_list *map_list;
303
304 /* Non-0 means -v, so print the full set of include dirs. */
305 char verbose;
306
307 /* Nonzero means use extra default include directories for C++. */
308
309 char cplusplus;
310
311 /* Nonzero means handle cplusplus style comments */
312
313 char cplusplus_comments;
314
315 /* Nonzero means handle #import, for objective C. */
316
317 char objc;
318
319 /* Nonzero means this is an assembly file, and allow
320 unknown directives, which could be comments. */
321
322 int lang_asm;
323
324 /* Nonzero means turn NOTREACHED into #pragma NOTREACHED etc */
325
326 char for_lint;
327
328 /* Nonzero means handle CHILL comment syntax
329 and output CHILL string delimiter for __DATE___ etc. */
330
331 char chill;
332
333 /* Nonzero means copy comments into the output file. */
334
335 char put_out_comments;
336
337 /* Nonzero means don't process the ANSI trigraph sequences. */
338
339 char no_trigraphs;
340
341 /* Nonzero means print the names of included files rather than
342 the preprocessed output. 1 means just the #include "...",
343 2 means #include <...> as well. */
344
345 char print_deps;
346
347 /* Nonzero if missing .h files in -M output are assumed to be generated
348 files and not errors. */
349
350 char print_deps_missing_files;
351
352 /* If true, fopen (deps_file, "a") else fopen (deps_file, "w"). */
353 char print_deps_append;
354
355 /* Nonzero means print names of header files (-H). */
356
357 char print_include_names;
358
359 /* Nonzero means try to make failure to fit ANSI C an error. */
360
361 char pedantic_errors;
362
363 /* Nonzero means don't print warning messages. -w. */
364
365 char inhibit_warnings;
366
367 /* Nonzero means warn if slash-star appears in a comment. */
368
369 char warn_comments;
370
371 /* Nonzero means warn if there are any trigraphs. */
372
373 char warn_trigraphs;
374
375 /* Nonzero means warn if #import is used. */
376
377 char warn_import;
378
379 /* Nonzero means warn if a macro argument is (or would be)
380 stringified with -traditional. */
381
382 char warn_stringify;
383
384 /* Nonzero means turn warnings into errors. */
385
386 char warnings_are_errors;
387
388 /* Nonzero causes output not to be done,
389 but directives such as #define that have side effects
390 are still obeyed. */
391
392 char no_output;
393
394 /* Nonzero means we should look for header.gcc files that remap file
395 names. */
396 char remap;
397
398 /* Nonzero means don't output line number information. */
399
400 char no_line_commands;
401
402 /* Nonzero means output the text in failing conditionals,
403 inside #failed ... #endfailed. */
404
405 char output_conditionals;
406
407 /* Nonzero means -I- has been seen,
408 so don't look for #include "foo" the source-file directory. */
409 char ignore_srcdir;
410
411 /* Zero means dollar signs are punctuation.
412 This used to be needed for conformance to the C Standard,
413 before the C Standard was corrected. */
414 char dollars_in_ident;
415
416 /* Nonzero means try to imitate old fashioned non-ANSI preprocessor. */
417 char traditional;
418
419 /* Nonzero means warn if undefined identifiers are evaluated in an #if. */
420 char warn_undef;
421
422 /* Nonzero for the 1989 C Standard, including corrigenda and amendments. */
423 char c89;
424
425 /* Nonzero means give all the error messages the ANSI standard requires. */
426 char pedantic;
427
428 char done_initializing;
429
430 /* Search paths for include files. system_include, after_include are
431 only used during option parsing. */
432 struct file_name_list *quote_include; /* First dir to search for "file" */
433 struct file_name_list *bracket_include;/* First dir to search for <file> */
434 struct file_name_list *system_include; /* First dir with system headers */
435 struct file_name_list *after_include; /* Headers to search after system */
436
437 /* Directory prefix that should replace `/usr' in the standard
438 include file directories. */
439 char *include_prefix;
440
441 char inhibit_predefs;
442 char no_standard_includes;
443 char no_standard_cplusplus_includes;
444
445 /* dump_only means inhibit output of the preprocessed text
446 and instead output the definitions of all user-defined
447 macros in a form suitable for use as input to cccp.
448 dump_names means pass #define and the macro name through to output.
449 dump_definitions means pass the whole definition (plus #define) through
450 */
451
452 enum {dump_none = 0, dump_only, dump_names, dump_definitions}
453 dump_macros;
454
455 /* Nonzero means pass all #define and #undef directives which we actually
456 process through to the output stream. This feature is used primarily
457 to allow cc1 to record the #defines and #undefs for the sake of
458 debuggers which understand about preprocessor macros, but it may
459 also be useful with -E to figure out how symbols are defined, and
460 where they are defined. */
461 int debug_output;
462
463 /* Nonzero means pass #include lines through to the output,
464 even if they are ifdefed out. */
465 int dump_includes;
466
467 /* Pending -D, -U and -A options, in reverse order. */
468 struct cpp_pending *pending;
469
470 /* File name which deps are being written to.
471 This is 0 if deps are being written to stdout. */
472 char *deps_file;
473
474 /* Target-name to write with the dependency information. */
475 char *deps_target;
476 };
477
478 #define CPP_TRADITIONAL(PFILE) (CPP_OPTIONS(PFILE)-> traditional)
479 #define CPP_WARN_UNDEF(PFILE) (CPP_OPTIONS(PFILE)->warn_undef)
480 #define CPP_C89(PFILE) (CPP_OPTIONS(PFILE)->c89)
481 #define CPP_PEDANTIC(PFILE) (CPP_OPTIONS (PFILE)->pedantic)
482 #define CPP_PRINT_DEPS(PFILE) (CPP_OPTIONS (PFILE)->print_deps)
483
484 /* List of directories to look for include files in. */
485 struct file_name_list
486 {
487 struct file_name_list *next;
488 struct file_name_list *alloc; /* for the cache of
489 current directory entries */
490 char *name;
491 unsigned int nlen;
492 /* We use these to tell if the directory mentioned here is a duplicate
493 of an earlier directory on the search path. */
494 ino_t ino;
495 dev_t dev;
496 /* If the following is nonzero, it is a C-language system include
497 directory. */
498 int sysp;
499 /* Mapping of file names for this directory.
500 Only used on MS-DOS and related platforms. */
501 struct file_name_map *name_map;
502 };
503 #define ABSOLUTE_PATH ((struct file_name_list *)-1)
504
505 /* This structure is used for the table of all includes. It is
506 indexed by the `short name' (the name as it appeared in the
507 #include statement) which is stored in *nshort. */
508 struct include_hash
509 {
510 struct include_hash *next;
511 /* Next file with the same short name but a
512 different (partial) pathname). */
513 struct include_hash *next_this_file;
514
515 /* Location of the file in the include search path.
516 Used for include_next */
517 struct file_name_list *foundhere;
518 char *name; /* (partial) pathname of file */
519 char *nshort; /* name of file as referenced in #include */
520 char *control_macro; /* macro, if any, preventing reinclusion - see
521 redundant_include_p */
522 char *buf, *limit; /* for file content cache, not yet implemented */
523 };
524
525 /* If a buffer's dir field is SELF_DIR_DUMMY, it means the file was found
526 via the same directory as the file that #included it. */
527 #define SELF_DIR_DUMMY ((struct file_name_list *) (~0))
528
529
530 /* Name under which this program was invoked. */
531
532 extern char *progname;
533
534 /* The structure of a node in the hash table. The hash table
535 has entries for all tokens defined by #define commands (type T_MACRO),
536 plus some special tokens like __LINE__ (these each have their own
537 type, and the appropriate code is run when that type of node is seen.
538 It does not contain control words like "#define", which are recognized
539 by a separate piece of code. */
540
541 /* different flavors of hash nodes --- also used in keyword table */
542 enum node_type {
543 T_DEFINE = 1, /* the `#define' keyword */
544 T_INCLUDE, /* the `#include' keyword */
545 T_INCLUDE_NEXT, /* the `#include_next' keyword */
546 T_IMPORT, /* the `#import' keyword */
547 T_IFDEF, /* the `#ifdef' keyword */
548 T_IFNDEF, /* the `#ifndef' keyword */
549 T_IF, /* the `#if' keyword */
550 T_ELSE, /* `#else' */
551 T_PRAGMA, /* `#pragma' */
552 T_ELIF, /* `#elif' */
553 T_UNDEF, /* `#undef' */
554 T_LINE, /* `#line' */
555 T_ERROR, /* `#error' */
556 T_WARNING, /* `#warning' */
557 T_ENDIF, /* `#endif' */
558 T_SCCS, /* `#sccs', used on system V. */
559 T_IDENT, /* `#ident', used on system V. */
560 T_ASSERT, /* `#assert', taken from system V. */
561 T_UNASSERT, /* `#unassert', taken from system V. */
562 T_SPECLINE, /* special symbol `__LINE__' */
563 T_DATE, /* `__DATE__' */
564 T_FILE, /* `__FILE__' */
565 T_BASE_FILE, /* `__BASE_FILE__' */
566 T_INCLUDE_LEVEL, /* `__INCLUDE_LEVEL__' */
567 T_VERSION, /* `__VERSION__' */
568 T_SIZE_TYPE, /* `__SIZE_TYPE__' */
569 T_PTRDIFF_TYPE, /* `__PTRDIFF_TYPE__' */
570 T_WCHAR_TYPE, /* `__WCHAR_TYPE__' */
571 T_USER_LABEL_PREFIX_TYPE, /* `__USER_LABEL_PREFIX__' */
572 T_REGISTER_PREFIX_TYPE, /* `__REGISTER_PREFIX__' */
573 T_TIME, /* `__TIME__' */
574 T_CONST, /* Constant value, used by `__STDC__' */
575 T_MACRO, /* macro defined by `#define' */
576 T_DISABLED, /* macro temporarily turned off for rescan */
577 T_SPEC_DEFINED, /* special `defined' macro for use in #if statements */
578 T_PCSTRING, /* precompiled string (hashval is KEYDEF *) */
579 T_UNUSED /* Used for something not defined. */
580 };
581
582 /* Structure returned by create_definition */
583 typedef struct macrodef MACRODEF;
584 struct macrodef
585 {
586 struct definition *defn;
587 unsigned char *symnam;
588 int symlen;
589 };
590
591 /* Structure allocated for every #define. For a simple replacement
592 such as
593 #define foo bar ,
594 nargs = -1, the `pattern' list is null, and the expansion is just
595 the replacement text. Nargs = 0 means a functionlike macro with no args,
596 e.g.,
597 #define getchar() getc (stdin) .
598 When there are args, the expansion is the replacement text with the
599 args squashed out, and the reflist is a list describing how to
600 build the output from the input: e.g., "3 chars, then the 1st arg,
601 then 9 chars, then the 3rd arg, then 0 chars, then the 2nd arg".
602 The chars here come from the expansion. Whatever is left of the
603 expansion after the last arg-occurrence is copied after that arg.
604 Note that the reflist can be arbitrarily long---
605 its length depends on the number of times the arguments appear in
606 the replacement text, not how many args there are. Example:
607 #define f(x) x+x+x+x+x+x+x would have replacement text "++++++" and
608 pattern list
609 { (0, 1), (1, 1), (1, 1), ..., (1, 1), NULL }
610 where (x, y) means (nchars, argno). */
611
612 typedef struct definition DEFINITION;
613 struct definition {
614 int nargs;
615 int length; /* length of expansion string */
616 int predefined; /* True if the macro was builtin or */
617 /* came from the command line */
618 unsigned char *expansion;
619 int line; /* Line number of definition */
620 char *file; /* File of definition */
621 char rest_args; /* Nonzero if last arg. absorbs the rest */
622 struct reflist {
623 struct reflist *next;
624 char stringify; /* nonzero if this arg was preceded by a
625 # operator. */
626 char raw_before; /* Nonzero if a ## operator before arg. */
627 char raw_after; /* Nonzero if a ## operator after arg. */
628 char rest_args; /* Nonzero if this arg. absorbs the rest */
629 int nchars; /* Number of literal chars to copy before
630 this arg occurrence. */
631 int argno; /* Number of arg to substitute (origin-0) */
632 } *pattern;
633 union {
634 /* Names of macro args, concatenated in reverse order
635 with comma-space between them.
636 The only use of this is that we warn on redefinition
637 if this differs between the old and new definitions. */
638 unsigned char *argnames;
639 } args;
640 };
641
642 extern unsigned char is_idchar[256];
643 extern unsigned char is_hor_space[256];
644 extern unsigned char is_space[256];
645
646 /* Stack of conditionals currently in progress
647 (including both successful and failing conditionals). */
648
649 struct if_stack {
650 struct if_stack *next; /* for chaining to the next stack frame */
651 char *fname; /* copied from input when frame is made */
652 int lineno; /* similarly */
653 int if_succeeded; /* true if a leg of this if-group
654 has been passed through rescan */
655 unsigned char *control_macro; /* For #ifndef at start of file,
656 this is the macro name tested. */
657 enum node_type type; /* type of last directive seen in this group */
658 };
659 typedef struct if_stack IF_STACK_FRAME;
660
661 /* Find the largest host integer type and set its size and type.
662 Watch out: on some crazy hosts `long' is shorter than `int'. */
663
664 #ifndef HOST_WIDE_INT
665 #include "machmode.h"
666 #endif
667
668 extern void cpp_buf_line_and_col PARAMS((cpp_buffer *, long *, long *));
669 extern cpp_buffer* cpp_file_buffer PARAMS((cpp_reader *));
670 extern void cpp_define PARAMS ((cpp_reader*, unsigned char *));
671
672 extern void cpp_error PVPROTO ((cpp_reader *, const char *, ...))
673 ATTRIBUTE_PRINTF_2;
674 extern void cpp_warning PVPROTO ((cpp_reader *, const char *, ...))
675 ATTRIBUTE_PRINTF_2;
676 extern void cpp_pedwarn PVPROTO ((cpp_reader *, const char *, ...))
677 ATTRIBUTE_PRINTF_2;
678 extern void cpp_error_with_line PVPROTO ((cpp_reader *, int, int, const char *, ...))
679 ATTRIBUTE_PRINTF_4;
680 extern void cpp_pedwarn_with_line PVPROTO ((cpp_reader *, int, int, const char *, ...))
681 ATTRIBUTE_PRINTF_4;
682 extern void cpp_pedwarn_with_file_and_line PVPROTO ((cpp_reader *, char *, int, const char *, ...))
683 ATTRIBUTE_PRINTF_4;
684 extern void cpp_message_from_errno PROTO ((cpp_reader *, int, const char *));
685 extern void cpp_error_from_errno PROTO ((cpp_reader *, const char *));
686 extern void cpp_perror_with_name PROTO ((cpp_reader *, const char *));
687 extern void v_cpp_message PROTO ((cpp_reader *, int, const char *, va_list));
688
689 extern void cpp_grow_buffer PARAMS ((cpp_reader *, long));
690 extern HOST_WIDE_INT cpp_parse_escape PARAMS ((cpp_reader *, char **, HOST_WIDE_INT));
691 extern cpp_buffer *cpp_push_buffer PARAMS ((cpp_reader *,
692 unsigned char *, long));
693 extern cpp_buffer *cpp_pop_buffer PARAMS ((cpp_reader *));
694
695 extern cpp_hashnode *cpp_lookup PARAMS ((cpp_reader *, const unsigned char *,
696 int, int));
697 extern void cpp_reader_init PARAMS ((cpp_reader *));
698 extern void cpp_options_init PARAMS ((cpp_options *));
699 extern int cpp_start_read PARAMS ((cpp_reader *, char *));
700 extern int cpp_read_check_assertion PARAMS ((cpp_reader *));
701 extern int scan_decls PARAMS ((cpp_reader *, int, char **));
702 extern void skip_rest_of_line PARAMS ((cpp_reader *));
703 extern void cpp_finish PARAMS ((cpp_reader *));
704
705 /* From cpperror.c */
706 extern void cpp_fatal PVPROTO ((cpp_reader *, const char *, ...))
707 ATTRIBUTE_PRINTF_2;
708 extern void cpp_message PVPROTO ((cpp_reader *, int, const char *, ...))
709 ATTRIBUTE_PRINTF_3;
710 extern void cpp_pfatal_with_name PROTO ((cpp_reader *, const char *));
711 extern void cpp_file_line_for_message PROTO ((cpp_reader *, char *, int, int));
712 extern void cpp_print_containing_files PROTO ((cpp_reader *));
713
714 /* In cppfiles.c */
715 extern void append_include_chain PROTO ((cpp_reader *,
716 struct file_name_list **,
717 const char *, int));
718 extern void merge_include_chains PROTO ((struct cpp_options *));
719 extern int find_include_file PROTO ((cpp_reader *, char *,
720 struct file_name_list *,
721 struct include_hash **,
722 int *));
723 extern int finclude PROTO ((cpp_reader *, int,
724 struct include_hash *));
725 extern void deps_output PROTO ((cpp_reader *, char *, int));
726 extern struct include_hash *include_hash PROTO ((cpp_reader *, char *, int));
727
728 #ifndef INCLUDE_LEN_FUDGE
729 #define INCLUDE_LEN_FUDGE 0
730 #endif
731
732
733 #ifdef __cplusplus
734 }
735 #endif
736 #endif /* __GCC_CPPLIB__ */
737