1 /* Definitions for CPP library.
2 Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
3 2004, 2005, 2007, 2008, 2009
4 Free Software Foundation, Inc.
5 Written by Per Bothner, 1994-95.
7 This program is free software; you can redistribute it and/or modify it
8 under the terms of the GNU General Public License as published by the
9 Free Software Foundation; either version 3, or (at your option) any
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>.
21 In other words, you are welcome to use, share and improve this program.
22 You are forbidden to forbid anyone else to use, share and improve
23 what you give them. Help stamp out software-hoarding! */
24 #ifndef LIBCPP_CPPLIB_H
25 #define LIBCPP_CPPLIB_H
27 #include <sys/types.h>
35 typedef struct cpp_reader cpp_reader;
36 typedef struct cpp_buffer cpp_buffer;
37 typedef struct cpp_options cpp_options;
38 typedef struct cpp_token cpp_token;
39 typedef struct cpp_string cpp_string;
40 typedef struct cpp_hashnode cpp_hashnode;
41 typedef struct cpp_macro cpp_macro;
42 typedef struct cpp_callbacks cpp_callbacks;
43 typedef struct cpp_dir cpp_dir;
48 /* The first three groups, apart from '=', can appear in preprocessor
49 expressions (+= and -= are used to indicate unary + and - resp.).
50 This allows a lookup table to be implemented in _cpp_parse_expr.
52 The first group, to CPP_LAST_EQ, can be immediately followed by an
53 '='. The lexer needs operators ending in '=', like ">>=", to be in
54 the same order as their counterparts without the '=', like ">>".
56 See the cpp_operator table optab in expr.c if you change the order or
57 add or remove anything in the first group. */
62 OP(GREATER, ">") /* compare */ \
64 OP(PLUS, "+") /* math */ \
69 OP(AND, "&") /* bit ops */ \
76 OP(AND_AND, "&&") /* logical */ \
80 OP(COMMA, ",") /* grouping */ \
82 OP(CLOSE_PAREN, ")") \
84 OP(EQ_EQ, "==") /* compare */ \
86 OP(GREATER_EQ, ">=") \
89 /* These two are unary + / - in preprocessor expressions. */ \
90 OP(PLUS_EQ, "+=") /* math */ \
96 OP(AND_EQ, "&=") /* bit ops */ \
99 OP(RSHIFT_EQ, ">>=") \
100 OP(LSHIFT_EQ, "<<=") \
101 /* Digraphs together, beginning with CPP_FIRST_DIGRAPH. */ \
102 OP(HASH, "#") /* digraphs */ \
104 OP(OPEN_SQUARE, "[") \
105 OP(CLOSE_SQUARE, "]") \
106 OP(OPEN_BRACE, "{") \
107 OP(CLOSE_BRACE, "}") \
108 /* The remainder of the punctuation. Order is not significant. */ \
109 OP(SEMICOLON, ";") /* structure */ \
110 OP(ELLIPSIS, "...") \
111 OP(PLUS_PLUS, "++") /* increment */ \
112 OP(MINUS_MINUS, "--") \
113 OP(DEREF, "->") /* accessors */ \
116 OP(DEREF_STAR, "->*") \
118 OP(ATSIGN, "@") /* used in Objective-C */ \
120 TK(NAME, IDENT) /* word */ \
121 TK(AT_NAME, IDENT) /* @word - Objective-C */ \
122 TK(NUMBER, LITERAL) /* 34_be+ta */ \
124 TK(CHAR, LITERAL) /* 'char' */ \
125 TK(WCHAR, LITERAL) /* L'char' */ \
126 TK(CHAR16, LITERAL) /* u'char' */ \
127 TK(CHAR32, LITERAL) /* U'char' */ \
128 TK(OTHER, LITERAL) /* stray punctuation */ \
130 TK(STRING, LITERAL) /* "string" */ \
131 TK(WSTRING, LITERAL) /* L"string" */ \
132 TK(STRING16, LITERAL) /* u"string" */ \
133 TK(STRING32, LITERAL) /* U"string" */ \
134 TK(OBJC_STRING, LITERAL) /* @"string" - Objective-C */ \
135 TK(HEADER_NAME, LITERAL) /* <stdio.h> in #include */ \
137 TK(COMMENT, LITERAL) /* Only if output comments. */ \
138 /* SPELL_LITERAL happens to DTRT. */ \
139 TK(MACRO_ARG, NONE) /* Macro argument. */ \
140 TK(PRAGMA, NONE) /* Only for deferred pragmas. */ \
141 TK(PRAGMA_EOL, NONE) /* End-of-line for deferred pragmas. */ \
142 TK(PADDING, NONE) /* Whitespace for -E. */
144 #define OP(e, s) CPP_ ## e,
145 #define TK(e, s) CPP_ ## e,
151 /* Positions in the table. */
152 CPP_LAST_EQ = CPP_LSHIFT,
153 CPP_FIRST_DIGRAPH = CPP_HASH,
154 CPP_LAST_PUNCTUATOR= CPP_ATSIGN,
155 CPP_LAST_CPP_OP = CPP_LESS_EQ
160 /* C language kind, used when calling cpp_create_reader. */
161 enum c_lang {CLK_GNUC89 = 0, CLK_GNUC99, CLK_STDC89, CLK_STDC94, CLK_STDC99,
162 CLK_GNUCXX, CLK_CXX98, CLK_GNUCXX0X, CLK_CXX0X, CLK_ASM};
164 /* Payload of a NUMBER, STRING, CHAR or COMMENT token. */
165 struct cpp_string GTY(())
168 const unsigned char *text;
171 /* Flags for the cpp_token structure. */
172 #define PREV_WHITE (1 << 0) /* If whitespace before this token. */
173 #define DIGRAPH (1 << 1) /* If it was a digraph. */
174 #define STRINGIFY_ARG (1 << 2) /* If macro argument to be stringified. */
175 #define PASTE_LEFT (1 << 3) /* If on LHS of a ## operator. */
176 #define NAMED_OP (1 << 4) /* C++ named operators. */
177 #define NO_EXPAND (1 << 5) /* Do not macro-expand this token. */
178 #define BOL (1 << 6) /* Token at beginning of line. */
179 #define PURE_ZERO (1 << 7) /* Single 0 digit, used by the C++ frontend,
181 #define SP_DIGRAPH (1 << 8) /* # or ## token was a digraph. */
182 #define SP_PREV_WHITE (1 << 9) /* If whitespace before a ##
183 operator, or before this token
184 after a # operator. */
186 /* Specify which field, if any, of the cpp_token union is used. */
188 enum cpp_token_fld_kind {
190 CPP_TOKEN_FLD_SOURCE,
192 CPP_TOKEN_FLD_ARG_NO,
193 CPP_TOKEN_FLD_PRAGMA,
197 /* A preprocessing token. This has been carefully packed and should
198 occupy 16 bytes on 32-bit hosts and 24 bytes on 64-bit hosts. */
199 struct cpp_token GTY(())
201 source_location src_loc; /* Location of first char of token. */
202 ENUM_BITFIELD(cpp_ttype) type : CHAR_BIT; /* token type */
203 unsigned short flags; /* flags - see above */
209 GTY ((nested_ptr (union tree_node,
210 "%h ? CPP_HASHNODE (GCC_IDENT_TO_HT_IDENT (%h)) : NULL",
211 "%h ? HT_IDENT_TO_GCC_IDENT (HT_NODE (%h)) : NULL"),
212 tag ("CPP_TOKEN_FLD_NODE")))
215 /* Inherit padding from this token. */
216 cpp_token * GTY ((tag ("CPP_TOKEN_FLD_SOURCE"))) source;
218 /* A string, or number. */
219 struct cpp_string GTY ((tag ("CPP_TOKEN_FLD_STR"))) str;
221 /* Argument no. for a CPP_MACRO_ARG. */
222 unsigned int GTY ((tag ("CPP_TOKEN_FLD_ARG_NO"))) arg_no;
224 /* Caller-supplied identifier for a CPP_PRAGMA. */
225 unsigned int GTY ((tag ("CPP_TOKEN_FLD_PRAGMA"))) pragma;
226 } GTY ((desc ("cpp_token_val_index (&%1)"))) val;
229 /* Say which field is in use. */
230 extern enum cpp_token_fld_kind cpp_token_val_index (cpp_token *tok);
232 /* A type wide enough to hold any multibyte source character.
233 cpplib's character constant interpreter requires an unsigned type.
234 Also, a typedef for the signed equivalent.
235 The width of this type is capped at 32 bits; there do exist targets
236 where wchar_t is 64 bits, but only in a non-default mode, and there
237 would be no meaningful interpretation for a wchar_t value greater
238 than 2^32 anyway -- the widest wide-character encoding around is
239 ISO 10646, which stops at 2^31. */
240 #if CHAR_BIT * SIZEOF_INT >= 32
241 # define CPPCHAR_SIGNED_T int
242 #elif CHAR_BIT * SIZEOF_LONG >= 32
243 # define CPPCHAR_SIGNED_T long
245 # error "Cannot find a least-32-bit signed integer type"
247 typedef unsigned CPPCHAR_SIGNED_T cppchar_t;
248 typedef CPPCHAR_SIGNED_T cppchar_signed_t;
250 /* Style of header dependencies to generate. */
251 enum cpp_deps_style { DEPS_NONE = 0, DEPS_USER, DEPS_SYSTEM };
253 /* The possible normalization levels, from most restrictive to least. */
254 enum cpp_normalize_level {
259 /* In NFC, except for subsequences where being in NFC would make
260 the identifier invalid. */
261 normalized_identifier_C,
262 /* Not normalized at all. */
266 /* This structure is nested inside struct cpp_reader, and
267 carries all the options visible to the command line. */
270 /* Characters between tab stops. */
271 unsigned int tabstop;
273 /* The language we're preprocessing. */
276 /* Nonzero means use extra default include directories for C++. */
277 unsigned char cplusplus;
279 /* Nonzero means handle cplusplus style comments. */
280 unsigned char cplusplus_comments;
282 /* Nonzero means define __OBJC__, treat @ as a special token, use
283 the OBJC[PLUS]_INCLUDE_PATH environment variable, and allow
287 /* Nonzero means don't copy comments into the output file. */
288 unsigned char discard_comments;
290 /* Nonzero means don't copy comments into the output file during
292 unsigned char discard_comments_in_macro_exp;
294 /* Nonzero means process the ISO trigraph sequences. */
295 unsigned char trigraphs;
297 /* Nonzero means process the ISO digraph sequences. */
298 unsigned char digraphs;
300 /* Nonzero means to allow hexadecimal floats and LL suffixes. */
301 unsigned char extended_numbers;
303 /* Nonzero means process u/U prefix literals (UTF-16/32). */
304 unsigned char uliterals;
306 /* Nonzero means print names of header files (-H). */
307 unsigned char print_include_names;
309 /* Nonzero means complain about deprecated features. */
310 unsigned char warn_deprecated;
312 /* Nonzero means warn if slash-star appears in a comment. */
313 unsigned char warn_comments;
315 /* Nonzero means warn if a user-supplied include directory does not
317 unsigned char warn_missing_include_dirs;
319 /* Nonzero means warn if there are any trigraphs. */
320 unsigned char warn_trigraphs;
322 /* Nonzero means warn about multicharacter charconsts. */
323 unsigned char warn_multichar;
325 /* Nonzero means warn about various incompatibilities with
327 unsigned char warn_traditional;
329 /* Nonzero means warn about long long numeric constants. */
330 unsigned char warn_long_long;
332 /* Nonzero means warn about text after an #endif (or #else). */
333 unsigned char warn_endif_labels;
335 /* Nonzero means warn about implicit sign changes owing to integer
337 unsigned char warn_num_sign_change;
339 /* Zero means don't warn about __VA_ARGS__ usage in c89 pedantic mode.
340 Presumably the usage is protected by the appropriate #ifdef. */
341 unsigned char warn_variadic_macros;
343 /* Nonzero means warn about builtin macros that are redefined or
344 explicitly undefined. */
345 unsigned char warn_builtin_macro_redefined;
347 /* Nonzero means we should look for header.gcc files that remap file
351 /* Zero means dollar signs are punctuation. */
352 unsigned char dollars_in_ident;
354 /* Nonzero means UCNs are accepted in identifiers. */
355 unsigned char extended_identifiers;
357 /* True if we should warn about dollars in identifiers or numbers
358 for this translation unit. */
359 unsigned char warn_dollars;
361 /* Nonzero means warn if undefined identifiers are evaluated in an #if. */
362 unsigned char warn_undef;
364 /* Nonzero means warn of unused macros from the main file. */
365 unsigned char warn_unused_macros;
367 /* Nonzero for the 1999 C Standard, including corrigenda and amendments. */
370 /* Nonzero if we are conforming to a specific C or C++ standard. */
373 /* Nonzero means give all the error messages the ANSI standard requires. */
374 unsigned char pedantic;
376 /* Nonzero means we're looking at already preprocessed code, so don't
377 bother trying to do macro expansion and whatnot. */
378 unsigned char preprocessed;
380 /* Print column number in error messages. */
381 unsigned char show_column;
383 /* Nonzero means handle C++ alternate operator names. */
384 unsigned char operator_names;
386 /* True for traditional preprocessing. */
387 unsigned char traditional;
389 /* Holds the name of the target (execution) character set. */
390 const char *narrow_charset;
392 /* Holds the name of the target wide character set. */
393 const char *wide_charset;
395 /* Holds the name of the input character set. */
396 const char *input_charset;
398 /* The minimum permitted level of normalization before a warning
400 enum cpp_normalize_level warn_normalize;
402 /* True to warn about precompiled header files we couldn't use. */
403 bool warn_invalid_pch;
405 /* True if dependencies should be restored from a precompiled header. */
406 bool restore_pch_deps;
408 /* Dependency generation. */
411 /* Style of header dependencies to generate. */
412 enum cpp_deps_style style;
414 /* Assume missing files are generated files. */
417 /* Generate phony targets for each dependency apart from the first
421 /* If true, no dependency is generated on the main file. */
422 bool ignore_main_file;
425 /* Target-specific features set by the front end or client. */
427 /* Precision for target CPP arithmetic, target characters, target
428 ints and target wide characters, respectively. */
429 size_t precision, char_precision, int_precision, wchar_precision;
431 /* True means chars (wide chars) are unsigned. */
432 bool unsigned_char, unsigned_wchar;
434 /* True if the most significant byte in a word has the lowest
435 address in memory. */
436 bool bytes_big_endian;
438 /* Nonzero means __STDC__ should have the value 0 in system headers. */
439 unsigned char stdc_0_in_system_headers;
441 /* True disables tokenization outside of preprocessing directives. */
442 bool directives_only;
445 /* Callback for header lookup for HEADER, which is the name of a
446 source file. It is used as a method of last resort to find headers
447 that are not otherwise found during the normal include processing.
448 The return value is the malloced name of a header to try and open,
449 if any, or NULL otherwise. This callback is called only if the
450 header is otherwise unfound. */
451 typedef const char *(*missing_header_cb)(cpp_reader *, const char *header, cpp_dir **);
453 /* Call backs to cpplib client. */
456 /* Called when a new line of preprocessed output is started. */
457 void (*line_change) (cpp_reader *, const cpp_token *, int);
459 /* Called when switching to/from a new file.
460 The line_map is for the new file. It is NULL if there is no new file.
461 (In C this happens when done with <built-in>+<command line> and also
462 when done with a main file.) This can be used for resource cleanup. */
463 void (*file_change) (cpp_reader *, const struct line_map *);
465 void (*dir_change) (cpp_reader *, const char *);
466 void (*include) (cpp_reader *, unsigned int, const unsigned char *,
467 const char *, int, const cpp_token **);
468 void (*define) (cpp_reader *, unsigned int, cpp_hashnode *);
469 void (*undef) (cpp_reader *, unsigned int, cpp_hashnode *);
470 void (*ident) (cpp_reader *, unsigned int, const cpp_string *);
471 void (*def_pragma) (cpp_reader *, unsigned int);
472 int (*valid_pch) (cpp_reader *, const char *, int);
473 void (*read_pch) (cpp_reader *, const char *, int, const char *);
474 missing_header_cb missing_header;
476 /* Context-sensitive macro support. Returns macro (if any) that should
478 cpp_hashnode * (*macro_to_expand) (cpp_reader *, const cpp_token *);
480 /* Called to emit a diagnostic. This callback receives the
481 translated message. */
482 bool (*error) (cpp_reader *, int, source_location, unsigned int,
483 const char *, va_list *)
484 ATTRIBUTE_FPTR_PRINTF(5,0);
486 /* Callbacks for when a macro is expanded, or tested (whether
487 defined or not at the time) in #ifdef, #ifndef or "defined". */
488 void (*used_define) (cpp_reader *, unsigned int, cpp_hashnode *);
489 void (*used_undef) (cpp_reader *, unsigned int, cpp_hashnode *);
490 /* Called before #define and #undef or other macro definition
491 changes are processed. */
492 void (*before_define) (cpp_reader *);
495 /* Chain of directories to look for include files in. */
498 /* NULL-terminated singly-linked list. */
499 struct cpp_dir *next;
501 /* NAME of the directory, NUL-terminated. */
505 /* One if a system header, two if a system header that has extern
506 "C" guards for C++. */
509 /* Is this a user-supplied directory? */
510 bool user_supplied_p;
512 /* The canonicalized NAME as determined by lrealpath. This field
513 is only used by hosts that lack reliable inode numbers. */
514 char *canonical_name;
516 /* Mapping of file names for this directory for MS-DOS and related
517 platforms. A NULL-terminated array of (from, to) pairs. */
518 const char **name_map;
520 /* Routine to construct pathname, given the search path name and the
521 HEADER we are trying to find, return a constructed pathname to
522 try and open. If this is NULL, the constructed pathname is as
523 constructed by append_file_to_dir. */
524 char *(*construct) (const char *header, cpp_dir *dir);
526 /* The C front end uses these to recognize duplicated
527 directories in the search path. */
532 /* Name under which this program was invoked. */
533 extern const char *progname;
535 /* The structure of a node in the hash table. The hash table has
536 entries for all identifiers: either macros defined by #define
537 commands (type NT_MACRO), assertions created with #assert
538 (NT_ASSERTION), or neither of the above (NT_VOID). Builtin macros
539 like __LINE__ are flagged NODE_BUILTIN. Poisoned identifiers are
540 flagged NODE_POISONED. NODE_OPERATOR (C++ only) indicates an
541 identifier that behaves like an operator such as "xor".
542 NODE_DIAGNOSTIC is for speed in lex_token: it indicates a
543 diagnostic may be required for this node. Currently this only
544 applies to __VA_ARGS__ and poisoned identifiers. */
546 /* Hash node flags. */
547 #define NODE_OPERATOR (1 << 0) /* C++ named operator. */
548 #define NODE_POISONED (1 << 1) /* Poisoned identifier. */
549 #define NODE_BUILTIN (1 << 2) /* Builtin macro. */
550 #define NODE_DIAGNOSTIC (1 << 3) /* Possible diagnostic when lexed. */
551 #define NODE_WARN (1 << 4) /* Warn if redefined or undefined. */
552 #define NODE_DISABLED (1 << 5) /* A disabled macro. */
553 #define NODE_MACRO_ARG (1 << 6) /* Used during #define processing. */
554 #define NODE_USED (1 << 7) /* Dumped with -dU. */
555 #define NODE_CONDITIONAL (1 << 8) /* Conditional macro */
557 /* Different flavors of hash node. */
560 NT_VOID = 0, /* No definition yet. */
561 NT_MACRO, /* A macro of some form. */
562 NT_ASSERTION /* Predicate for #assert. */
565 /* Different flavors of builtin macro. _Pragma is an operator, but we
566 handle it with the builtin code for efficiency reasons. */
569 BT_SPECLINE = 0, /* `__LINE__' */
570 BT_DATE, /* `__DATE__' */
571 BT_FILE, /* `__FILE__' */
572 BT_BASE_FILE, /* `__BASE_FILE__' */
573 BT_INCLUDE_LEVEL, /* `__INCLUDE_LEVEL__' */
574 BT_TIME, /* `__TIME__' */
575 BT_STDC, /* `__STDC__' */
576 BT_PRAGMA, /* `_Pragma' operator */
577 BT_TIMESTAMP, /* `__TIMESTAMP__' */
578 BT_COUNTER /* `__COUNTER__' */
581 #define CPP_HASHNODE(HNODE) ((cpp_hashnode *) (HNODE))
582 #define HT_NODE(NODE) ((ht_identifier *) (NODE))
583 #define NODE_LEN(NODE) HT_LEN (&(NODE)->ident)
584 #define NODE_NAME(NODE) HT_STR (&(NODE)->ident)
586 /* Specify which field, if any, of the union is used. */
596 #define CPP_HASHNODE_VALUE_IDX(HNODE) \
597 ((HNODE.flags & NODE_MACRO_ARG) ? NTV_ARGUMENT \
598 : HNODE.type == NT_MACRO ? ((HNODE.flags & NODE_BUILTIN) \
599 ? NTV_BUILTIN : NTV_MACRO) \
600 : HNODE.type == NT_ASSERTION ? NTV_ANSWER \
603 /* The common part of an identifier node shared amongst all 3 C front
604 ends. Also used to store CPP identifiers, which are a superset of
605 identifiers in the grammatical sense. */
607 union _cpp_hashnode_value GTY(())
610 cpp_macro * GTY((tag ("NTV_MACRO"))) macro;
611 /* Answers to an assertion. */
612 struct answer * GTY ((tag ("NTV_ANSWER"))) answers;
613 /* Code for a builtin macro. */
614 enum builtin_type GTY ((tag ("NTV_BUILTIN"))) builtin;
615 /* Macro argument index. */
616 unsigned short GTY ((tag ("NTV_ARGUMENT"))) arg_index;
619 struct cpp_hashnode GTY(())
621 struct ht_identifier ident;
622 unsigned int is_directive : 1;
623 unsigned int directive_index : 7; /* If is_directive,
624 then index into directive table.
625 Otherwise, a NODE_OPERATOR. */
626 unsigned char rid_code; /* Rid code - for front ends. */
627 ENUM_BITFIELD(node_type) type : 7; /* CPP node type. */
628 unsigned int flags : 9; /* CPP flags. */
630 union _cpp_hashnode_value GTY ((desc ("CPP_HASHNODE_VALUE_IDX (%1)"))) value;
633 /* Call this first to get a handle to pass to other functions.
635 If you want cpplib to manage its own hashtable, pass in a NULL
636 pointer. Otherwise you should pass in an initialized hash table
637 that cpplib will share; this technique is used by the C front
639 extern cpp_reader *cpp_create_reader (enum c_lang, struct ht *,
642 /* Reset the cpp_reader's line_map. This is only used after reading a
644 extern void cpp_set_line_map (cpp_reader *, struct line_maps *);
646 /* Call this to change the selected language standard (e.g. because of
647 command line options). */
648 extern void cpp_set_lang (cpp_reader *, enum c_lang);
650 /* Set the include paths. */
651 extern void cpp_set_include_chains (cpp_reader *, cpp_dir *, cpp_dir *, int);
653 /* Call these to get pointers to the options, callback, and deps
654 structures for a given reader. These pointers are good until you
655 call cpp_finish on that reader. You can either edit the callbacks
656 through the pointer returned from cpp_get_callbacks, or set them
657 with cpp_set_callbacks. */
658 extern cpp_options *cpp_get_options (cpp_reader *);
659 extern cpp_callbacks *cpp_get_callbacks (cpp_reader *);
660 extern void cpp_set_callbacks (cpp_reader *, cpp_callbacks *);
661 extern struct deps *cpp_get_deps (cpp_reader *);
663 /* This function reads the file, but does not start preprocessing. It
664 returns the name of the original file; this is the same as the
665 input file, except for preprocessed input. This will generate at
666 least one file change callback, and possibly a line change callback
667 too. If there was an error opening the file, it returns NULL. */
668 extern const char *cpp_read_main_file (cpp_reader *, const char *);
670 /* Set up built-ins with special behavior. Use cpp_init_builtins()
671 instead unless your know what you are doing. */
672 extern void cpp_init_special_builtins (cpp_reader *);
674 /* Set up built-ins like __FILE__. */
675 extern void cpp_init_builtins (cpp_reader *, int);
677 /* This is called after options have been parsed, and partially
679 extern void cpp_post_options (cpp_reader *);
681 /* Set up translation to the target character set. */
682 extern void cpp_init_iconv (cpp_reader *);
684 /* Call this to finish preprocessing. If you requested dependency
685 generation, pass an open stream to write the information to,
686 otherwise NULL. It is your responsibility to close the stream. */
687 extern void cpp_finish (cpp_reader *, FILE *deps_stream);
689 /* Call this to release the handle at the end of preprocessing. Any
690 use of the handle after this function returns is invalid. */
691 extern void cpp_destroy (cpp_reader *);
693 extern unsigned int cpp_token_len (const cpp_token *);
694 extern unsigned char *cpp_token_as_text (cpp_reader *, const cpp_token *);
695 extern unsigned char *cpp_spell_token (cpp_reader *, const cpp_token *,
696 unsigned char *, bool);
697 extern void cpp_register_pragma (cpp_reader *, const char *, const char *,
698 void (*) (cpp_reader *), bool);
699 extern void cpp_register_deferred_pragma (cpp_reader *, const char *,
700 const char *, unsigned, bool, bool);
701 extern int cpp_avoid_paste (cpp_reader *, const cpp_token *,
703 extern const cpp_token *cpp_get_token (cpp_reader *);
704 extern const cpp_token *cpp_get_token_with_location (cpp_reader *,
706 extern const unsigned char *cpp_macro_definition (cpp_reader *,
707 const cpp_hashnode *);
708 extern void _cpp_backup_tokens (cpp_reader *, unsigned int);
709 extern const cpp_token *cpp_peek_token (cpp_reader *, int);
711 /* Evaluate a CPP_CHAR or CPP_WCHAR token. */
712 extern cppchar_t cpp_interpret_charconst (cpp_reader *, const cpp_token *,
713 unsigned int *, int *);
714 /* Evaluate a vector of CPP_STRING or CPP_WSTRING tokens. */
715 extern bool cpp_interpret_string (cpp_reader *,
716 const cpp_string *, size_t,
717 cpp_string *, enum cpp_ttype);
718 extern bool cpp_interpret_string_notranslate (cpp_reader *,
719 const cpp_string *, size_t,
720 cpp_string *, enum cpp_ttype);
722 /* Convert a host character constant to the execution character set. */
723 extern cppchar_t cpp_host_to_exec_charset (cpp_reader *, cppchar_t);
725 /* Used to register macros and assertions, perhaps from the command line.
726 The text is the same as the command line argument. */
727 extern void cpp_define (cpp_reader *, const char *);
728 extern void cpp_define_formatted (cpp_reader *pfile,
729 const char *fmt, ...) ATTRIBUTE_PRINTF_2;
730 extern void cpp_assert (cpp_reader *, const char *);
731 extern void cpp_undef (cpp_reader *, const char *);
732 extern void cpp_unassert (cpp_reader *, const char *);
734 extern cpp_macro *cpp_push_definition (cpp_reader *, const char *);
735 extern void cpp_pop_definition (cpp_reader *, const char *, cpp_macro *);
737 /* Undefine all macros and assertions. */
738 extern void cpp_undef_all (cpp_reader *);
740 extern cpp_buffer *cpp_push_buffer (cpp_reader *, const unsigned char *,
742 extern int cpp_defined (cpp_reader *, const unsigned char *, int);
744 /* A preprocessing number. Code assumes that any unused high bits of
745 the double integer are set to zero. */
746 typedef unsigned HOST_WIDE_INT cpp_num_part;
747 typedef struct cpp_num cpp_num;
752 bool unsignedp; /* True if value should be treated as unsigned. */
753 bool overflow; /* True if the most recent calculation overflowed. */
756 /* cpplib provides two interfaces for interpretation of preprocessing
759 cpp_classify_number categorizes numeric constants according to
760 their field (integer, floating point, or invalid), radix (decimal,
761 octal, hexadecimal), and type suffixes. */
763 #define CPP_N_CATEGORY 0x000F
764 #define CPP_N_INVALID 0x0000
765 #define CPP_N_INTEGER 0x0001
766 #define CPP_N_FLOATING 0x0002
768 #define CPP_N_WIDTH 0x00F0
769 #define CPP_N_SMALL 0x0010 /* int, float, shrot _Fract/Accum */
770 #define CPP_N_MEDIUM 0x0020 /* long, double, long _Fract/_Accum. */
771 #define CPP_N_LARGE 0x0040 /* long long, long double,
772 long long _Fract/Accum. */
774 #define CPP_N_WIDTH_MD 0xF0000 /* machine defined. */
775 #define CPP_N_MD_W 0x10000
776 #define CPP_N_MD_Q 0x20000
778 #define CPP_N_RADIX 0x0F00
779 #define CPP_N_DECIMAL 0x0100
780 #define CPP_N_HEX 0x0200
781 #define CPP_N_OCTAL 0x0400
782 #define CPP_N_BINARY 0x0800
784 #define CPP_N_UNSIGNED 0x1000 /* Properties. */
785 #define CPP_N_IMAGINARY 0x2000
786 #define CPP_N_DFLOAT 0x4000
787 #define CPP_N_DEFAULT 0x8000
789 #define CPP_N_FRACT 0x100000 /* Fract types. */
790 #define CPP_N_ACCUM 0x200000 /* Accum types. */
792 /* Classify a CPP_NUMBER token. The return value is a combination of
793 the flags from the above sets. */
794 extern unsigned cpp_classify_number (cpp_reader *, const cpp_token *);
796 /* Evaluate a token classified as category CPP_N_INTEGER. */
797 extern cpp_num cpp_interpret_integer (cpp_reader *, const cpp_token *,
800 /* Sign extend a number, with PRECISION significant bits and all
801 others assumed clear, to fill out a cpp_num structure. */
802 cpp_num cpp_num_sign_extend (cpp_num, size_t);
804 /* Diagnostic levels. To get a diagnostic without associating a
805 position in the translation unit with it, use cpp_error_with_line
806 with a line number of zero. */
808 /* Warning, an error with -Werror. */
809 #define CPP_DL_WARNING 0x00
810 /* Same as CPP_DL_WARNING, except it is not suppressed in system headers. */
811 #define CPP_DL_WARNING_SYSHDR 0x01
812 /* Warning, an error with -pedantic-errors or -Werror. */
813 #define CPP_DL_PEDWARN 0x02
815 #define CPP_DL_ERROR 0x03
816 /* An internal consistency check failed. Prints "internal error: ",
817 otherwise the same as CPP_DL_ERROR. */
818 #define CPP_DL_ICE 0x04
819 /* An informative note following a warning. */
820 #define CPP_DL_NOTE 0x05
822 #define CPP_DL_FATAL 0x06
824 /* Output a diagnostic of some kind. */
825 extern bool cpp_error (cpp_reader *, int, const char *msgid, ...)
828 /* Output a diagnostic with "MSGID: " preceding the
829 error string of errno. No location is printed. */
830 extern bool cpp_errno (cpp_reader *, int, const char *msgid);
832 /* Same as cpp_error, except additionally specifies a position as a
833 (translation unit) physical line and physical column. If the line is
834 zero, then no location is printed. */
835 extern bool cpp_error_with_line (cpp_reader *, int, source_location, unsigned,
836 const char *msgid, ...) ATTRIBUTE_PRINTF_5;
839 extern int cpp_ideq (const cpp_token *, const char *);
840 extern void cpp_output_line (cpp_reader *, FILE *);
841 extern unsigned char *cpp_output_line_to_string (cpp_reader *,
842 const unsigned char *);
843 extern void cpp_output_token (const cpp_token *, FILE *);
844 extern const char *cpp_type2name (enum cpp_ttype, unsigned char flags);
845 /* Returns the value of an escape sequence, truncated to the correct
846 target precision. PSTR points to the input pointer, which is just
847 after the backslash. LIMIT is how much text we have. WIDE is true
848 if the escape sequence is part of a wide character constant or
849 string literal. Handles all relevant diagnostics. */
850 extern cppchar_t cpp_parse_escape (cpp_reader *, const unsigned char ** pstr,
851 const unsigned char *limit, int wide);
853 /* Structure used to hold a comment block at a given location in the
858 /* Text of the comment including the terminators. */
861 /* source location for the given comment. */
862 source_location sloc;
865 /* Structure holding all comments for a given cpp_reader. */
869 /* table of comment entries. */
870 cpp_comment *entries;
872 /* number of actual entries entered in the table. */
875 /* number of entries allocated currently. */
879 /* Returns the table of comments encountered by the preprocessor. This
880 table is only populated when pfile->state.save_comments is true. */
881 extern cpp_comment_table *cpp_get_comments (cpp_reader *);
885 /* Lookup an identifier in the hashtable. Puts the identifier in the
886 table if it is not already there. */
887 extern cpp_hashnode *cpp_lookup (cpp_reader *, const unsigned char *,
890 typedef int (*cpp_cb) (cpp_reader *, cpp_hashnode *, void *);
891 extern void cpp_forall_identifiers (cpp_reader *, cpp_cb, void *);
894 extern void cpp_scan_nooutput (cpp_reader *);
895 extern int cpp_sys_macro_p (cpp_reader *);
896 extern unsigned char *cpp_quote_string (unsigned char *, const unsigned char *,
900 extern bool cpp_included (cpp_reader *, const char *);
901 extern bool cpp_included_before (cpp_reader *, const char *, source_location);
902 extern void cpp_make_system_header (cpp_reader *, int, int);
903 extern bool cpp_push_include (cpp_reader *, const char *);
904 extern void cpp_change_file (cpp_reader *, enum lc_reason, const char *);
905 extern const char *cpp_get_path (struct _cpp_file *);
906 extern cpp_dir *cpp_get_dir (struct _cpp_file *);
907 extern cpp_buffer *cpp_get_buffer (cpp_reader *);
908 extern struct _cpp_file *cpp_get_file (cpp_buffer *);
909 extern cpp_buffer *cpp_get_prev (cpp_buffer *);
910 extern void cpp_clear_file_cache (cpp_reader *);
913 struct save_macro_data;
914 extern int cpp_save_state (cpp_reader *, FILE *);
915 extern int cpp_write_pch_deps (cpp_reader *, FILE *);
916 extern int cpp_write_pch_state (cpp_reader *, FILE *);
917 extern int cpp_valid_state (cpp_reader *, const char *, int);
918 extern void cpp_prepare_state (cpp_reader *, struct save_macro_data **);
919 extern int cpp_read_state (cpp_reader *, const char *, FILE *,
920 struct save_macro_data *);
926 #endif /* ! LIBCPP_CPPLIB_H */