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 unsigned char U_CHAR;
33 typedef struct cpp_reader cpp_reader;
34 typedef struct cpp_buffer cpp_buffer;
35 typedef struct cpp_options cpp_options;
43 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 enum cpp_token (*parse_underflow_t) PARAMS((cpp_reader *));
65 typedef int (*parse_cleanup_t) PARAMS((cpp_buffer *, cpp_reader *));
67 extern int cpp_handle_option PARAMS ((cpp_reader *, int, char **));
68 extern int cpp_handle_options PARAMS ((cpp_reader *, int, char **));
69 extern enum cpp_token cpp_get_token PARAMS ((cpp_reader *));
70 extern enum cpp_token cpp_get_non_space_token PARAMS ((cpp_reader *));
71 extern enum cpp_token get_directive_token PARAMS ((cpp_reader *));
73 /* This frees resources used by PFILE. */
74 extern void cpp_cleanup PARAMS ((cpp_reader *PFILE));
78 unsigned char *cur; /* current position */
79 unsigned char *rlimit; /* end of valid data */
80 unsigned char *buf; /* entire buffer */
81 unsigned char *alimit; /* end of allocated buffer */
82 unsigned char *line_base; /* start of current line */
84 struct cpp_buffer *prev;
86 /* Real filename. (Alias to ->ihash->fname, obsolete). */
88 /* Filename specified with #line command. */
89 const char *nominal_fname;
90 /* Last filename specified with #line command. */
91 const char *last_nominal_fname;
92 /* Actual directory of this file, used only for "" includes */
93 struct file_name_list *actual_dir;
95 /* Pointer into the include hash table. Used for include_next and
96 to record control macros. */
97 struct include_hash *ihash;
99 long lineno; /* Line number at CPP_LINE_BASE. */
100 long colno; /* Column number at CPP_LINE_BASE. */
101 long mark; /* Saved position for lengthy backtrack. */
102 parse_underflow_t underflow;
103 parse_cleanup_t cleanup;
106 /* Value of if_stack at start of this file.
107 Used to prohibit unmatched #endif (etc) in an include file. */
108 struct if_stack *if_stack;
110 /* True if this is a header file included using <FILENAME>. */
111 char system_header_p;
114 /* True if buffer contains escape sequences.
115 Currently there are two kinds:
116 "\r-" means following identifier should not be macro-expanded.
117 "\r " means a token-separator. This turns into " " in final output
118 if not stringizing and needed to separate tokens; otherwise nothing.
119 Any other two-character sequence beginning with \r is an error.
121 If this is NOT set, then \r is a one-character escape meaning backslash
122 newline. This is guaranteed not to occur in the middle of a token.
123 The two interpretations of \r do not conflict, because the two-character
124 escapes are used only in macro buffers, and backslash-newline is removed
125 from macro expansion text in collect_expansion and/or macarg. */
128 /* Used by the C++ frontend to implement redirected input (such as for
129 default argument and/or template parsing). */
132 /* True if we have already warned about C++ comments in this file.
133 The warning happens only for C89 extended mode with -pedantic on,
134 and only once per file (otherwise it would be far too noisy). */
135 char warned_cplusplus_comments;
138 struct file_name_map_list;
140 /* Maximum nesting of cpp_buffers. We use a static limit, partly for
141 efficiency, and partly to limit runaway recursion. */
142 #define CPP_STACK_MAX 200
144 /* A cpp_reader encapsulates the "state" of a pre-processor run.
145 Applying cpp_get_token repeatedly yields a stream of pre-processor
146 tokens. Usually, there is only one cpp_reader object active. */
150 parse_underflow_t get_token;
154 /* A buffer used for both for cpp_get_token's output, and also internally. */
155 unsigned char *token_buffer;
156 /* Allocated size of token_buffer. CPP_RESERVE allocates space. */
157 unsigned int token_buffer_size;
158 /* End of the written part of token_buffer. */
159 unsigned char *limit;
161 /* Error counter for exit code */
164 /* Line where a newline was first seen in a string constant. */
165 int multiline_string_line;
167 /* Current depth in #include directives that use <...>. */
168 int system_include_depth;
170 /* Current depth of buffer stack. */
171 int buffer_stack_depth;
173 /* Hash table of macros and assertions. See cpphash.c */
174 #define HASHSIZE 1403
175 struct hashnode **hashtab;
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];
181 /* Chain of `actual directory' file_name_list entries,
183 struct file_name_list *actual_dirs;
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;
189 struct if_stack *if_stack;
191 /* Nonzero means we have printed (while error reporting) a list of
192 containing files that matches the current status. */
193 char input_stack_listing_current;
195 /* If non-zero, macros are not expanded. */
196 char no_macro_expand;
198 /* If non-zero, directives cause a hard error. Used when parsing
202 /* Print column number in error messages. */
205 /* We're printed a warning recommending against using #import. */
208 /* If true, character between '<' and '>' are a single (string) token. */
209 char parsing_include_directive;
211 /* If true, # introduces an assertion (see do_assert) */
212 char parsing_if_directive;
214 /* If true, # and ## are the STRINGIZE and TOKPASTE operators */
215 char parsing_define_directive;
217 /* True if escape sequences (as described for has_escapes in
218 parse_buffer) should be emitted. */
221 /* 0: Have seen non-white-space on this line.
222 1: Only seen white space so far on this line.
223 2: Only seen white space so far in this file. */
224 char only_seen_white;
230 /* Buffer of -M output. */
233 /* A buffer and a table, used only by read_and_prescan (in cppfiles.c)
234 which are allocated once per cpp_reader object to keep them off the
235 stack and avoid setup costs. */
236 U_CHAR *input_buffer;
237 U_CHAR *input_speccase;
238 size_t input_buffer_len;
241 #define CPP_FATAL_LIMIT 1000
242 /* True if we have seen a "fatal" error. */
243 #define CPP_FATAL_ERRORS(READER) ((READER)->errors >= CPP_FATAL_LIMIT)
245 #define CPP_BUF_PEEK(BUFFER) \
246 ((BUFFER)->cur < (BUFFER)->rlimit ? *(BUFFER)->cur : EOF)
247 #define CPP_BUF_GET(BUFFER) \
248 ((BUFFER)->cur < (BUFFER)->rlimit ? *(BUFFER)->cur++ : EOF)
249 #define CPP_FORWARD(BUFFER, N) ((BUFFER)->cur += (N))
251 /* Macros for manipulating the token_buffer. */
253 #define CPP_OUT_BUFFER(PFILE) ((PFILE)->token_buffer)
255 /* Number of characters currently in PFILE's output buffer. */
256 #define CPP_WRITTEN(PFILE) ((size_t)((PFILE)->limit - (PFILE)->token_buffer))
257 #define CPP_PWRITTEN(PFILE) ((PFILE)->limit)
259 /* Make sure PFILE->token_buffer has space for at least N more characters. */
260 #define CPP_RESERVE(PFILE, N) \
261 (CPP_WRITTEN (PFILE) + (size_t)(N) > (PFILE)->token_buffer_size \
262 && (cpp_grow_buffer (PFILE, N), 0))
264 /* Append string STR (of length N) to PFILE's output buffer.
265 Assume there is enough space. */
266 #define CPP_PUTS_Q(PFILE, STR, N) \
267 (memcpy ((PFILE)->limit, STR, (N)), (PFILE)->limit += (N))
268 /* Append string STR (of length N) to PFILE's output buffer. Make space. */
269 #define CPP_PUTS(PFILE, STR, N) CPP_RESERVE(PFILE, N), CPP_PUTS_Q(PFILE, STR,N)
270 /* Append character CH to PFILE's output buffer. Assume sufficient space. */
271 #define CPP_PUTC_Q(PFILE, CH) (*(PFILE)->limit++ = (CH))
272 /* Append character CH to PFILE's output buffer. Make space if need be. */
273 #define CPP_PUTC(PFILE, CH) (CPP_RESERVE (PFILE, 1), CPP_PUTC_Q (PFILE, CH))
274 /* Make sure PFILE->limit is followed by '\0'. */
275 #define CPP_NUL_TERMINATE_Q(PFILE) (*(PFILE)->limit = 0)
276 #define CPP_NUL_TERMINATE(PFILE) (CPP_RESERVE(PFILE, 1), *(PFILE)->limit = 0)
277 #define CPP_ADJUST_WRITTEN(PFILE,DELTA) ((PFILE)->limit += (DELTA))
278 #define CPP_SET_WRITTEN(PFILE,N) ((PFILE)->limit = (PFILE)->token_buffer + (N))
280 /* Advance the current line by one. */
281 #define CPP_BUMP_BUFFER_LINE(PBUF) ((PBUF)->lineno++,\
282 (PBUF)->line_base = (PBUF)->cur)
283 #define CPP_BUMP_LINE(PFILE) CPP_BUMP_BUFFER_LINE(CPP_BUFFER(PFILE))
285 #define CPP_OPTIONS(PFILE) ((PFILE)->opts)
286 #define CPP_BUFFER(PFILE) ((PFILE)->buffer)
287 #define CPP_PREV_BUFFER(BUFFER) ((BUFFER)->prev)
288 /* The bottom of the buffer stack. */
289 #define CPP_NULL_BUFFER(PFILE) NULL
291 /* The `pending' structure accumulates all the options that are not
292 actually processed until we hit cpp_start_read. It consists of
293 several lists, one for each type of option. We keep both head and
294 tail pointers for quick insertion. */
297 struct pending_option *define_head, *define_tail;
298 struct pending_option *assert_head, *assert_tail;
300 struct file_name_list *quote_head, *quote_tail;
301 struct file_name_list *brack_head, *brack_tail;
302 struct file_name_list *systm_head, *systm_tail;
303 struct file_name_list *after_head, *after_tail;
305 struct pending_option *imacros_head, *imacros_tail;
306 struct pending_option *include_head, *include_tail;
309 /* Pointed to by cpp_reader.opts. */
313 /* Name of output file, for error messages. */
314 const char *out_fname;
316 struct file_name_map_list *map_list;
318 /* Non-0 means -v, so print the full set of include dirs. */
321 /* Nonzero means use extra default include directories for C++. */
325 /* Nonzero means handle cplusplus style comments */
327 char cplusplus_comments;
329 /* Nonzero means handle #import, for objective C. */
333 /* Nonzero means this is an assembly file, so ignore unrecognized
334 directives and the "# 33" form of #line, both of which are
335 probably comments. Also, permit unbalanced ' strings (again,
336 likely to be in comments). */
340 /* Nonzero means this is Fortran, and we don't know where the
341 comments are, so permit unbalanced ' strings. Unlike lang_asm,
342 this does not ignore unrecognized directives. */
346 /* Nonzero means handle CHILL comment syntax
347 and output CHILL string delimiter for __DATE___ etc. */
351 /* Nonzero means don't copy comments into the output file. */
353 char discard_comments;
355 /* Nonzero means process the ANSI trigraph sequences. */
359 /* Nonzero means print the names of included files rather than
360 the preprocessed output. 1 means just the #include "...",
361 2 means #include <...> as well. */
365 /* Nonzero if missing .h files in -M output are assumed to be generated
366 files and not errors. */
368 char print_deps_missing_files;
370 /* If true, fopen (deps_file, "a") else fopen (deps_file, "w"). */
371 char print_deps_append;
373 /* Nonzero means print names of header files (-H). */
375 char print_include_names;
377 /* Nonzero means try to make failure to fit ANSI C an error. */
379 char pedantic_errors;
381 /* Nonzero means don't print warning messages. */
383 char inhibit_warnings;
385 /* Nonzero means don't print error messages. Has no option to select it,
386 but can be set by a user of cpplib (e.g. fix-header). */
390 /* Nonzero means warn if slash-star appears in a comment. */
394 /* Nonzero means warn if there are any trigraphs. */
398 /* Nonzero means warn if #import is used. */
402 /* Nonzero means warn if a macro argument is (or would be)
403 stringified with -traditional. */
407 /* Nonzero means turn warnings into errors. */
409 char warnings_are_errors;
411 /* Nonzero causes output not to be done,
412 but directives such as #define that have side effects
417 /* Nonzero means we should look for header.gcc files that remap file
421 /* Nonzero means don't output line number information. */
422 char no_line_commands;
424 /* Nonzero means -I- has been seen,
425 so don't look for #include "foo" the source-file directory. */
428 /* Zero means dollar signs are punctuation.
429 This used to be needed for conformance to the C Standard,
430 before the C Standard was corrected. */
431 char dollars_in_ident;
433 /* Nonzero means try to imitate old fashioned non-ANSI preprocessor. */
436 /* Nonzero means warn if undefined identifiers are evaluated in an #if. */
439 /* Nonzero for the 1989 C Standard, including corrigenda and amendments. */
442 /* Nonzero for the 1999 C Standard, including corrigenda and amendments. */
445 /* Nonzero means give all the error messages the ANSI standard requires. */
448 /* Nonzero means we're looking at already preprocessed code, so don't
449 bother trying to do macro expansion and whatnot. */
452 char done_initializing;
454 /* Search paths for include files. */
455 struct file_name_list *quote_include; /* First dir to search for "file" */
456 struct file_name_list *bracket_include;/* First dir to search for <file> */
458 /* Directory prefix that should replace `/usr/lib/gcc-lib/TARGET/VERSION'
459 in the standard include file directories. */
460 char *include_prefix;
461 int include_prefix_len;
463 char no_standard_includes;
464 char no_standard_cplusplus_includes;
466 /* dump_only means inhibit output of the preprocessed text
467 and instead output the definitions of all user-defined
468 macros in a form suitable for use as input to cccp.
469 dump_names means pass #define and the macro name through to output.
470 dump_definitions means pass the whole definition (plus #define) through
473 enum {dump_none = 0, dump_only, dump_names, dump_definitions}
476 /* Nonzero means pass all #define and #undef directives which we actually
477 process through to the output stream. This feature is used primarily
478 to allow cc1 to record the #defines and #undefs for the sake of
479 debuggers which understand about preprocessor macros, but it may
480 also be useful with -E to figure out how symbols are defined, and
481 where they are defined. */
484 /* Nonzero means pass #include lines through to the output,
485 even if they are ifdefed out. */
488 /* Pending options - -D, -U, -A, -I, -ixxx. */
489 struct cpp_pending *pending;
491 /* File name which deps are being written to.
492 This is 0 if deps are being written to stdout. */
495 /* Target-name to write with the dependency information. */
499 #define CPP_TRADITIONAL(PFILE) (CPP_OPTIONS(PFILE)-> traditional)
500 #define CPP_WARN_UNDEF(PFILE) (CPP_OPTIONS(PFILE)->warn_undef)
501 #define CPP_C89(PFILE) (CPP_OPTIONS(PFILE)->c89)
502 #define CPP_PREPROCESSED(PFILE) (CPP_OPTIONS (PFILE)->preprocessed)
503 #define CPP_PRINT_DEPS(PFILE) (CPP_OPTIONS (PFILE)->print_deps)
505 #define CPP_PEDANTIC(PFILE) \
506 (CPP_OPTIONS (PFILE)->pedantic && !CPP_BUFFER (pfile)->system_header_p)
508 /* List of directories to look for include files in. */
509 struct file_name_list
511 struct file_name_list *next;
512 struct file_name_list *alloc; /* for the cache of
513 current directory entries */
516 /* We use these to tell if the directory mentioned here is a duplicate
517 of an earlier directory on the search path. */
520 /* If the following is nonzero, it is a C-language system include
523 /* Mapping of file names for this directory.
524 Only used on MS-DOS and related platforms. */
525 struct file_name_map *name_map;
527 #define ABSOLUTE_PATH ((struct file_name_list *)-1)
529 /* This structure is used for the table of all includes. It is
530 indexed by the `short name' (the name as it appeared in the
531 #include statement) which is stored in *nshort. */
534 struct include_hash *next;
535 /* Next file with the same short name but a
536 different (partial) pathname). */
537 struct include_hash *next_this_file;
539 /* Location of the file in the include search path.
540 Used for include_next */
541 struct file_name_list *foundhere;
542 const char *name; /* (partial) pathname of file */
543 const char *nshort; /* name of file as referenced in #include */
544 const char *control_macro; /* macro, if any, preventing reinclusion -
545 see redundant_include_p */
546 char *buf, *limit; /* for file content cache,
547 not yet implemented */
550 /* Name under which this program was invoked. */
552 extern const char *progname;
554 /* The structure of a node in the hash table. The hash table
555 has entries for all tokens defined by #define commands (type T_MACRO),
556 plus some special tokens like __LINE__ (these each have their own
557 type, and the appropriate code is run when that type of node is seen.
558 It does not contain control words like "#define", which are recognized
559 by a separate piece of code. */
561 /* different flavors of hash nodes --- also used in keyword table */
563 T_DEFINE = 1, /* the `#define' keyword */
564 T_INCLUDE, /* the `#include' keyword */
565 T_INCLUDE_NEXT, /* the `#include_next' keyword */
566 T_IMPORT, /* the `#import' keyword */
567 T_IFDEF, /* the `#ifdef' keyword */
568 T_IFNDEF, /* the `#ifndef' keyword */
569 T_IF, /* the `#if' keyword */
570 T_ELSE, /* `#else' */
571 T_PRAGMA, /* `#pragma' */
572 T_ELIF, /* `#elif' */
573 T_UNDEF, /* `#undef' */
574 T_LINE, /* `#line' */
575 T_ERROR, /* `#error' */
576 T_WARNING, /* `#warning' */
577 T_ENDIF, /* `#endif' */
578 T_SCCS, /* `#sccs', used on system V. */
579 T_IDENT, /* `#ident', used on system V. */
580 T_ASSERT, /* `#assert', taken from system V. */
581 T_UNASSERT, /* `#unassert', taken from system V. */
582 T_SPECLINE, /* special symbol `__LINE__' */
583 T_DATE, /* `__DATE__' */
584 T_FILE, /* `__FILE__' */
585 T_BASE_FILE, /* `__BASE_FILE__' */
586 T_INCLUDE_LEVEL, /* `__INCLUDE_LEVEL__' */
587 T_VERSION, /* `__VERSION__' */
588 T_TIME, /* `__TIME__' */
589 T_STDC, /* `__STDC__' */
590 T_CONST, /* Constant string, used by `__SIZE_TYPE__' etc */
591 T_MACRO, /* macro defined by `#define' */
592 T_DISABLED, /* macro temporarily turned off for rescan */
593 T_POISON, /* defined with `#pragma poison' */
594 T_UNUSED /* Used for something not defined. */
597 /* Character classes.
598 If the definition of `numchar' looks odd to you, please look up the
599 definition of a pp-number in the C standard [section 6.4.8 of C99] */
600 #define ISidnum 0x01 /* a-zA-Z0-9_ */
601 #define ISidstart 0x02 /* _a-zA-Z */
602 #define ISnumstart 0x04 /* 0-9 */
603 #define IShspace 0x08 /* ' ' \t \f \v */
604 #define ISspace 0x10 /* ' ' \t \f \v \n */
606 #define _dollar_ok(x) ((x) == '$' && CPP_OPTIONS (pfile)->dollars_in_ident)
608 #define is_idchar(x) ((_cpp_IStable[x] & ISidnum) || _dollar_ok(x))
609 #define is_idstart(x) ((_cpp_IStable[x] & ISidstart) || _dollar_ok(x))
610 #define is_numchar(x) (_cpp_IStable[x] & ISidnum)
611 #define is_numstart(x) (_cpp_IStable[x] & ISnumstart)
612 #define is_hspace(x) (_cpp_IStable[x] & IShspace)
613 #define is_space(x) (_cpp_IStable[x] & ISspace)
615 /* This table is constant if it can be initialized at compile time,
616 which is the case if cpp was compiled with GCC >=2.7, or another
617 compiler that supports C99. */
618 #if (GCC_VERSION >= 2007) || (__STDC_VERSION__ >= 199901L)
619 extern const unsigned char _cpp_IStable[256];
621 extern unsigned char _cpp_IStable[256];
624 /* Stack of conditionals currently in progress
625 (including both successful and failing conditionals). */
628 struct if_stack *next; /* for chaining to the next stack frame */
629 const char *fname; /* copied from input when frame is made */
630 int lineno; /* similarly */
631 int if_succeeded; /* true if a leg of this if-group
632 has been passed through rescan */
633 unsigned char *control_macro; /* For #ifndef at start of file,
634 this is the macro name tested. */
635 enum node_type type; /* type of last directive seen in this group */
637 typedef struct if_stack IF_STACK_FRAME;
639 extern void cpp_buf_line_and_col PARAMS((cpp_buffer *, long *, long *));
640 extern cpp_buffer* cpp_file_buffer PARAMS((cpp_reader *));
641 extern void cpp_define PARAMS ((cpp_reader *, unsigned char *));
642 extern void cpp_assert PARAMS ((cpp_reader *, unsigned char *));
643 extern void cpp_undef PARAMS ((cpp_reader *, unsigned char *));
644 extern void cpp_unassert PARAMS ((cpp_reader *, unsigned char *));
646 /* N.B. The error-message-printer prototypes have not been nicely
647 formatted because exgettext needs to see 'msgid' on the same line
648 as the name of the function in order to work properly. Only the
649 string argument gets a name in an effort to keep the lines from
650 getting ridiculously oversized. */
652 extern void cpp_ice PARAMS ((cpp_reader *, const char *msgid, ...))
654 extern void cpp_fatal PARAMS ((cpp_reader *, const char *msgid, ...))
656 extern void cpp_error PARAMS ((cpp_reader *, const char *msgid, ...))
658 extern void cpp_warning PARAMS ((cpp_reader *, const char *msgid, ...))
660 extern void cpp_pedwarn PARAMS ((cpp_reader *, const char *msgid, ...))
662 extern void cpp_notice PARAMS ((cpp_reader *, const char *msgid, ...))
664 extern void cpp_error_with_line PARAMS ((cpp_reader *, int, int, const char *msgid, ...))
666 extern void cpp_warning_with_line PARAMS ((cpp_reader *, int, int, const char *msgid, ...))
668 extern void cpp_pedwarn_with_line PARAMS ((cpp_reader *, int, int, const char *msgid, ...))
670 extern void cpp_pedwarn_with_file_and_line PARAMS ((cpp_reader *, const char *, int, int, const char *msgid, ...))
672 extern void cpp_error_from_errno PARAMS ((cpp_reader *, const char *));
673 extern void cpp_notice_from_errno PARAMS ((cpp_reader *, const char *));
675 extern void cpp_grow_buffer PARAMS ((cpp_reader *, long));
676 extern cpp_buffer *cpp_push_buffer PARAMS ((cpp_reader *,
677 unsigned char *, long));
678 extern cpp_buffer *cpp_pop_buffer PARAMS ((cpp_reader *));
679 extern int cpp_defined PARAMS ((cpp_reader *, const U_CHAR *, int));
681 extern void cpp_reader_init PARAMS ((cpp_reader *));
682 extern void cpp_options_init PARAMS ((cpp_options *));
683 extern int cpp_start_read PARAMS ((cpp_reader *, char *));
684 extern void cpp_finish PARAMS ((cpp_reader *));
686 extern void quote_string PARAMS ((cpp_reader *, const char *));
687 extern void cpp_expand_to_buffer PARAMS ((cpp_reader *, const U_CHAR *,
689 extern void cpp_scan_buffer PARAMS ((cpp_reader *));
691 /* Last arg to output_line_command. */
692 enum file_change_code {same_file, rename_file, enter_file, leave_file};
693 extern void output_line_command PARAMS ((cpp_reader *,
694 enum file_change_code));
697 extern void simplify_pathname PARAMS ((char *));
698 extern void merge_include_chains PARAMS ((struct cpp_options *));
699 extern int find_include_file PARAMS ((cpp_reader *, const char *,
700 struct file_name_list *,
701 struct include_hash **,
703 extern int finclude PARAMS ((cpp_reader *, int,
704 struct include_hash *));
705 extern int cpp_read_file PARAMS ((cpp_reader *, const char *));
706 extern struct include_hash *include_hash PARAMS ((cpp_reader *, const char *, int));
711 #endif /* __GCC_CPPLIB__ */