1 /* Definitions for CPP library.
2 Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
3 2004, 2005, 2007, 2008, 2009, 2010
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>
31 typedef struct cpp_reader cpp_reader;
32 typedef struct cpp_buffer cpp_buffer;
33 typedef struct cpp_options cpp_options;
34 typedef struct cpp_token cpp_token;
35 typedef struct cpp_string cpp_string;
36 typedef struct cpp_hashnode cpp_hashnode;
37 typedef struct cpp_macro cpp_macro;
38 typedef struct cpp_callbacks cpp_callbacks;
39 typedef struct cpp_dir cpp_dir;
44 /* The first three groups, apart from '=', can appear in preprocessor
45 expressions (+= and -= are used to indicate unary + and - resp.).
46 This allows a lookup table to be implemented in _cpp_parse_expr.
48 The first group, to CPP_LAST_EQ, can be immediately followed by an
49 '='. The lexer needs operators ending in '=', like ">>=", to be in
50 the same order as their counterparts without the '=', like ">>".
52 See the cpp_operator table optab in expr.c if you change the order or
53 add or remove anything in the first group. */
58 OP(GREATER, ">") /* compare */ \
60 OP(PLUS, "+") /* math */ \
65 OP(AND, "&") /* bit ops */ \
72 OP(AND_AND, "&&") /* logical */ \
76 OP(COMMA, ",") /* grouping */ \
78 OP(CLOSE_PAREN, ")") \
80 OP(EQ_EQ, "==") /* compare */ \
82 OP(GREATER_EQ, ">=") \
85 /* These two are unary + / - in preprocessor expressions. */ \
86 OP(PLUS_EQ, "+=") /* math */ \
92 OP(AND_EQ, "&=") /* bit ops */ \
95 OP(RSHIFT_EQ, ">>=") \
96 OP(LSHIFT_EQ, "<<=") \
97 /* Digraphs together, beginning with CPP_FIRST_DIGRAPH. */ \
98 OP(HASH, "#") /* digraphs */ \
100 OP(OPEN_SQUARE, "[") \
101 OP(CLOSE_SQUARE, "]") \
102 OP(OPEN_BRACE, "{") \
103 OP(CLOSE_BRACE, "}") \
104 /* The remainder of the punctuation. Order is not significant. */ \
105 OP(SEMICOLON, ";") /* structure */ \
106 OP(ELLIPSIS, "...") \
107 OP(PLUS_PLUS, "++") /* increment */ \
108 OP(MINUS_MINUS, "--") \
109 OP(DEREF, "->") /* accessors */ \
112 OP(DEREF_STAR, "->*") \
114 OP(ATSIGN, "@") /* used in Objective-C */ \
116 TK(NAME, IDENT) /* word */ \
117 TK(AT_NAME, IDENT) /* @word - Objective-C */ \
118 TK(NUMBER, LITERAL) /* 34_be+ta */ \
120 TK(CHAR, LITERAL) /* 'char' */ \
121 TK(WCHAR, LITERAL) /* L'char' */ \
122 TK(CHAR16, LITERAL) /* u'char' */ \
123 TK(CHAR32, LITERAL) /* U'char' */ \
124 TK(OTHER, LITERAL) /* stray punctuation */ \
126 TK(STRING, LITERAL) /* "string" */ \
127 TK(WSTRING, LITERAL) /* L"string" */ \
128 TK(STRING16, LITERAL) /* u"string" */ \
129 TK(STRING32, LITERAL) /* U"string" */ \
130 TK(UTF8STRING, LITERAL) /* u8"string" */ \
131 TK(OBJC_STRING, LITERAL) /* @"string" - Objective-C */ \
132 TK(HEADER_NAME, LITERAL) /* <stdio.h> in #include */ \
134 TK(COMMENT, LITERAL) /* Only if output comments. */ \
135 /* SPELL_LITERAL happens to DTRT. */ \
136 TK(MACRO_ARG, NONE) /* Macro argument. */ \
137 TK(PRAGMA, NONE) /* Only for deferred pragmas. */ \
138 TK(PRAGMA_EOL, NONE) /* End-of-line for deferred pragmas. */ \
139 TK(PADDING, NONE) /* Whitespace for -E. */
141 #define OP(e, s) CPP_ ## e,
142 #define TK(e, s) CPP_ ## e,
148 /* Positions in the table. */
149 CPP_LAST_EQ = CPP_LSHIFT,
150 CPP_FIRST_DIGRAPH = CPP_HASH,
151 CPP_LAST_PUNCTUATOR= CPP_ATSIGN,
152 CPP_LAST_CPP_OP = CPP_LESS_EQ
157 /* C language kind, used when calling cpp_create_reader. */
158 enum c_lang {CLK_GNUC89 = 0, CLK_GNUC99, CLK_GNUC1X,
159 CLK_STDC89, CLK_STDC94, CLK_STDC99, CLK_STDC1X,
160 CLK_GNUCXX, CLK_CXX98, CLK_GNUCXX0X, CLK_CXX0X, CLK_ASM};
162 /* Payload of a NUMBER, STRING, CHAR or COMMENT token. */
163 struct GTY(()) cpp_string {
165 const unsigned char *text;
168 /* Flags for the cpp_token structure. */
169 #define PREV_WHITE (1 << 0) /* If whitespace before this token. */
170 #define DIGRAPH (1 << 1) /* If it was a digraph. */
171 #define STRINGIFY_ARG (1 << 2) /* If macro argument to be stringified. */
172 #define PASTE_LEFT (1 << 3) /* If on LHS of a ## operator. */
173 #define NAMED_OP (1 << 4) /* C++ named operators. */
174 #define NO_EXPAND (1 << 5) /* Do not macro-expand this token. */
175 #define BOL (1 << 6) /* Token at beginning of line. */
176 #define PURE_ZERO (1 << 7) /* Single 0 digit, used by the C++ frontend,
178 #define SP_DIGRAPH (1 << 8) /* # or ## token was a digraph. */
179 #define SP_PREV_WHITE (1 << 9) /* If whitespace before a ##
180 operator, or before this token
181 after a # operator. */
183 /* Specify which field, if any, of the cpp_token union is used. */
185 enum cpp_token_fld_kind {
187 CPP_TOKEN_FLD_SOURCE,
189 CPP_TOKEN_FLD_ARG_NO,
190 CPP_TOKEN_FLD_TOKEN_NO,
191 CPP_TOKEN_FLD_PRAGMA,
195 /* A macro argument in the cpp_token union. */
196 struct GTY(()) cpp_macro_arg {
197 /* Argument number. */
201 /* An identifier in the cpp_token union. */
202 struct GTY(()) cpp_identifier {
203 /* The canonical (UTF-8) spelling of the identifier. */
205 GTY ((nested_ptr (union tree_node,
206 "%h ? CPP_HASHNODE (GCC_IDENT_TO_HT_IDENT (%h)) : NULL",
207 "%h ? HT_IDENT_TO_GCC_IDENT (HT_NODE (%h)) : NULL")))
211 /* A preprocessing token. This has been carefully packed and should
212 occupy 16 bytes on 32-bit hosts and 24 bytes on 64-bit hosts. */
213 struct GTY(()) cpp_token {
214 source_location src_loc; /* Location of first char of token. */
215 ENUM_BITFIELD(cpp_ttype) type : CHAR_BIT; /* token type */
216 unsigned short flags; /* flags - see above */
221 struct cpp_identifier GTY ((tag ("CPP_TOKEN_FLD_NODE"))) node;
223 /* Inherit padding from this token. */
224 cpp_token * GTY ((tag ("CPP_TOKEN_FLD_SOURCE"))) source;
226 /* A string, or number. */
227 struct cpp_string GTY ((tag ("CPP_TOKEN_FLD_STR"))) str;
229 /* Argument no. for a CPP_MACRO_ARG. */
230 struct cpp_macro_arg GTY ((tag ("CPP_TOKEN_FLD_ARG_NO"))) macro_arg;
232 /* Original token no. for a CPP_PASTE (from a sequence of
233 consecutive paste tokens in a macro expansion). */
234 unsigned int GTY ((tag ("CPP_TOKEN_FLD_TOKEN_NO"))) token_no;
236 /* Caller-supplied identifier for a CPP_PRAGMA. */
237 unsigned int GTY ((tag ("CPP_TOKEN_FLD_PRAGMA"))) pragma;
238 } GTY ((desc ("cpp_token_val_index (&%1)"))) val;
241 /* Say which field is in use. */
242 extern enum cpp_token_fld_kind cpp_token_val_index (cpp_token *tok);
244 /* A type wide enough to hold any multibyte source character.
245 cpplib's character constant interpreter requires an unsigned type.
246 Also, a typedef for the signed equivalent.
247 The width of this type is capped at 32 bits; there do exist targets
248 where wchar_t is 64 bits, but only in a non-default mode, and there
249 would be no meaningful interpretation for a wchar_t value greater
250 than 2^32 anyway -- the widest wide-character encoding around is
251 ISO 10646, which stops at 2^31. */
252 #if CHAR_BIT * SIZEOF_INT >= 32
253 # define CPPCHAR_SIGNED_T int
254 #elif CHAR_BIT * SIZEOF_LONG >= 32
255 # define CPPCHAR_SIGNED_T long
257 # error "Cannot find a least-32-bit signed integer type"
259 typedef unsigned CPPCHAR_SIGNED_T cppchar_t;
260 typedef CPPCHAR_SIGNED_T cppchar_signed_t;
262 /* Style of header dependencies to generate. */
263 enum cpp_deps_style { DEPS_NONE = 0, DEPS_USER, DEPS_SYSTEM };
265 /* The possible normalization levels, from most restrictive to least. */
266 enum cpp_normalize_level {
271 /* In NFC, except for subsequences where being in NFC would make
272 the identifier invalid. */
273 normalized_identifier_C,
274 /* Not normalized at all. */
278 /* This structure is nested inside struct cpp_reader, and
279 carries all the options visible to the command line. */
282 /* Characters between tab stops. */
283 unsigned int tabstop;
285 /* The language we're preprocessing. */
288 /* Nonzero means use extra default include directories for C++. */
289 unsigned char cplusplus;
291 /* Nonzero means handle cplusplus style comments. */
292 unsigned char cplusplus_comments;
294 /* Nonzero means define __OBJC__, treat @ as a special token, use
295 the OBJC[PLUS]_INCLUDE_PATH environment variable, and allow
299 /* Nonzero means don't copy comments into the output file. */
300 unsigned char discard_comments;
302 /* Nonzero means don't copy comments into the output file during
304 unsigned char discard_comments_in_macro_exp;
306 /* Nonzero means process the ISO trigraph sequences. */
307 unsigned char trigraphs;
309 /* Nonzero means process the ISO digraph sequences. */
310 unsigned char digraphs;
312 /* Nonzero means to allow hexadecimal floats and LL suffixes. */
313 unsigned char extended_numbers;
315 /* Nonzero means process u/U prefix literals (UTF-16/32). */
316 unsigned char uliterals;
318 /* Nonzero means print names of header files (-H). */
319 unsigned char print_include_names;
321 /* Nonzero means complain about deprecated features. */
322 unsigned char warn_deprecated;
324 /* Nonzero means warn if slash-star appears in a comment. */
325 unsigned char warn_comments;
327 /* Nonzero means warn if a user-supplied include directory does not
329 unsigned char warn_missing_include_dirs;
331 /* Nonzero means warn if there are any trigraphs. */
332 unsigned char warn_trigraphs;
334 /* Nonzero means warn about multicharacter charconsts. */
335 unsigned char warn_multichar;
337 /* Nonzero means warn about various incompatibilities with
339 unsigned char warn_traditional;
341 /* Nonzero means warn about long long numeric constants. */
342 unsigned char warn_long_long;
344 /* Nonzero means warn about text after an #endif (or #else). */
345 unsigned char warn_endif_labels;
347 /* Nonzero means warn about implicit sign changes owing to integer
349 unsigned char warn_num_sign_change;
351 /* Zero means don't warn about __VA_ARGS__ usage in c89 pedantic mode.
352 Presumably the usage is protected by the appropriate #ifdef. */
353 unsigned char warn_variadic_macros;
355 /* Nonzero means warn about builtin macros that are redefined or
356 explicitly undefined. */
357 unsigned char warn_builtin_macro_redefined;
359 /* Nonzero means we should look for header.gcc files that remap file
363 /* Zero means dollar signs are punctuation. */
364 unsigned char dollars_in_ident;
366 /* Nonzero means UCNs are accepted in identifiers. */
367 unsigned char extended_identifiers;
369 /* True if we should warn about dollars in identifiers or numbers
370 for this translation unit. */
371 unsigned char warn_dollars;
373 /* Nonzero means warn if undefined identifiers are evaluated in an #if. */
374 unsigned char warn_undef;
376 /* Nonzero means warn of unused macros from the main file. */
377 unsigned char warn_unused_macros;
379 /* Nonzero for the 1999 C Standard, including corrigenda and amendments. */
382 /* Nonzero if we are conforming to a specific C or C++ standard. */
385 /* Nonzero means give all the error messages the ANSI standard requires. */
386 unsigned char pedantic;
388 /* Nonzero means we're looking at already preprocessed code, so don't
389 bother trying to do macro expansion and whatnot. */
390 unsigned char preprocessed;
392 /* Nonzero means handle C++ alternate operator names. */
393 unsigned char operator_names;
395 /* Nonzero means warn about use of C++ alternate operator names. */
396 unsigned char warn_cxx_operator_names;
398 /* True for traditional preprocessing. */
399 unsigned char traditional;
401 /* Holds the name of the target (execution) character set. */
402 const char *narrow_charset;
404 /* Holds the name of the target wide character set. */
405 const char *wide_charset;
407 /* Holds the name of the input character set. */
408 const char *input_charset;
410 /* The minimum permitted level of normalization before a warning
412 enum cpp_normalize_level warn_normalize;
414 /* True to warn about precompiled header files we couldn't use. */
415 bool warn_invalid_pch;
417 /* True if dependencies should be restored from a precompiled header. */
418 bool restore_pch_deps;
420 /* Dependency generation. */
423 /* Style of header dependencies to generate. */
424 enum cpp_deps_style style;
426 /* Assume missing files are generated files. */
429 /* Generate phony targets for each dependency apart from the first
433 /* If true, no dependency is generated on the main file. */
434 bool ignore_main_file;
436 /* If true, intend to use the preprocessor output (e.g., for compilation)
437 in addition to the dependency info. */
438 bool need_preprocessor_output;
441 /* Target-specific features set by the front end or client. */
443 /* Precision for target CPP arithmetic, target characters, target
444 ints and target wide characters, respectively. */
445 size_t precision, char_precision, int_precision, wchar_precision;
447 /* True means chars (wide chars) are unsigned. */
448 bool unsigned_char, unsigned_wchar;
450 /* True if the most significant byte in a word has the lowest
451 address in memory. */
452 bool bytes_big_endian;
454 /* Nonzero means __STDC__ should have the value 0 in system headers. */
455 unsigned char stdc_0_in_system_headers;
457 /* True disables tokenization outside of preprocessing directives. */
458 bool directives_only;
461 /* Callback for header lookup for HEADER, which is the name of a
462 source file. It is used as a method of last resort to find headers
463 that are not otherwise found during the normal include processing.
464 The return value is the malloced name of a header to try and open,
465 if any, or NULL otherwise. This callback is called only if the
466 header is otherwise unfound. */
467 typedef const char *(*missing_header_cb)(cpp_reader *, const char *header, cpp_dir **);
469 /* Call backs to cpplib client. */
472 /* Called when a new line of preprocessed output is started. */
473 void (*line_change) (cpp_reader *, const cpp_token *, int);
475 /* Called when switching to/from a new file.
476 The line_map is for the new file. It is NULL if there is no new file.
477 (In C this happens when done with <built-in>+<command line> and also
478 when done with a main file.) This can be used for resource cleanup. */
479 void (*file_change) (cpp_reader *, const struct line_map *);
481 void (*dir_change) (cpp_reader *, const char *);
482 void (*include) (cpp_reader *, unsigned int, const unsigned char *,
483 const char *, int, const cpp_token **);
484 void (*define) (cpp_reader *, unsigned int, cpp_hashnode *);
485 void (*undef) (cpp_reader *, unsigned int, cpp_hashnode *);
486 void (*ident) (cpp_reader *, unsigned int, const cpp_string *);
487 void (*def_pragma) (cpp_reader *, unsigned int);
488 int (*valid_pch) (cpp_reader *, const char *, int);
489 void (*read_pch) (cpp_reader *, const char *, int, const char *);
490 missing_header_cb missing_header;
492 /* Context-sensitive macro support. Returns macro (if any) that should
494 cpp_hashnode * (*macro_to_expand) (cpp_reader *, const cpp_token *);
496 /* Called to emit a diagnostic. This callback receives the
497 translated message. */
498 bool (*error) (cpp_reader *, int, int, source_location, unsigned int,
499 const char *, va_list *)
500 ATTRIBUTE_FPTR_PRINTF(6,0);
502 /* Callbacks for when a macro is expanded, or tested (whether
503 defined or not at the time) in #ifdef, #ifndef or "defined". */
504 void (*used_define) (cpp_reader *, unsigned int, cpp_hashnode *);
505 void (*used_undef) (cpp_reader *, unsigned int, cpp_hashnode *);
506 /* Called before #define and #undef or other macro definition
507 changes are processed. */
508 void (*before_define) (cpp_reader *);
509 /* Called whenever a macro is expanded or tested.
510 Second argument is the location of the start of the current expansion. */
511 void (*used) (cpp_reader *, source_location, cpp_hashnode *);
515 #define INO_T_CPP ino_t ino[3]
517 #define INO_T_CPP ino_t ino
520 /* Chain of directories to look for include files in. */
523 /* NULL-terminated singly-linked list. */
524 struct cpp_dir *next;
526 /* NAME of the directory, NUL-terminated. */
530 /* One if a system header, two if a system header that has extern
531 "C" guards for C++. */
534 /* Is this a user-supplied directory? */
535 bool user_supplied_p;
537 /* The canonicalized NAME as determined by lrealpath. This field
538 is only used by hosts that lack reliable inode numbers. */
539 char *canonical_name;
541 /* Mapping of file names for this directory for MS-DOS and related
542 platforms. A NULL-terminated array of (from, to) pairs. */
543 const char **name_map;
545 /* Routine to construct pathname, given the search path name and the
546 HEADER we are trying to find, return a constructed pathname to
547 try and open. If this is NULL, the constructed pathname is as
548 constructed by append_file_to_dir. */
549 char *(*construct) (const char *header, cpp_dir *dir);
551 /* The C front end uses these to recognize duplicated
552 directories in the search path. */
557 /* The structure of a node in the hash table. The hash table has
558 entries for all identifiers: either macros defined by #define
559 commands (type NT_MACRO), assertions created with #assert
560 (NT_ASSERTION), or neither of the above (NT_VOID). Builtin macros
561 like __LINE__ are flagged NODE_BUILTIN. Poisoned identifiers are
562 flagged NODE_POISONED. NODE_OPERATOR (C++ only) indicates an
563 identifier that behaves like an operator such as "xor".
564 NODE_DIAGNOSTIC is for speed in lex_token: it indicates a
565 diagnostic may be required for this node. Currently this only
566 applies to __VA_ARGS__, poisoned identifiers, and -Wc++-compat
567 warnings about NODE_OPERATOR. */
569 /* Hash node flags. */
570 #define NODE_OPERATOR (1 << 0) /* C++ named operator. */
571 #define NODE_POISONED (1 << 1) /* Poisoned identifier. */
572 #define NODE_BUILTIN (1 << 2) /* Builtin macro. */
573 #define NODE_DIAGNOSTIC (1 << 3) /* Possible diagnostic when lexed. */
574 #define NODE_WARN (1 << 4) /* Warn if redefined or undefined. */
575 #define NODE_DISABLED (1 << 5) /* A disabled macro. */
576 #define NODE_MACRO_ARG (1 << 6) /* Used during #define processing. */
577 #define NODE_USED (1 << 7) /* Dumped with -dU. */
578 #define NODE_CONDITIONAL (1 << 8) /* Conditional macro */
579 #define NODE_WARN_OPERATOR (1 << 9) /* Warn about C++ named operator. */
581 /* Different flavors of hash node. */
584 NT_VOID = 0, /* No definition yet. */
585 NT_MACRO, /* A macro of some form. */
586 NT_ASSERTION /* Predicate for #assert. */
589 /* Different flavors of builtin macro. _Pragma is an operator, but we
590 handle it with the builtin code for efficiency reasons. */
591 enum cpp_builtin_type
593 BT_SPECLINE = 0, /* `__LINE__' */
594 BT_DATE, /* `__DATE__' */
595 BT_FILE, /* `__FILE__' */
596 BT_BASE_FILE, /* `__BASE_FILE__' */
597 BT_INCLUDE_LEVEL, /* `__INCLUDE_LEVEL__' */
598 BT_TIME, /* `__TIME__' */
599 BT_STDC, /* `__STDC__' */
600 BT_PRAGMA, /* `_Pragma' operator */
601 BT_TIMESTAMP, /* `__TIMESTAMP__' */
602 BT_COUNTER /* `__COUNTER__' */
605 #define CPP_HASHNODE(HNODE) ((cpp_hashnode *) (HNODE))
606 #define HT_NODE(NODE) ((ht_identifier *) (NODE))
607 #define NODE_LEN(NODE) HT_LEN (&(NODE)->ident)
608 #define NODE_NAME(NODE) HT_STR (&(NODE)->ident)
610 /* Specify which field, if any, of the union is used. */
620 #define CPP_HASHNODE_VALUE_IDX(HNODE) \
621 ((HNODE.flags & NODE_MACRO_ARG) ? NTV_ARGUMENT \
622 : HNODE.type == NT_MACRO ? ((HNODE.flags & NODE_BUILTIN) \
623 ? NTV_BUILTIN : NTV_MACRO) \
624 : HNODE.type == NT_ASSERTION ? NTV_ANSWER \
627 /* The common part of an identifier node shared amongst all 3 C front
628 ends. Also used to store CPP identifiers, which are a superset of
629 identifiers in the grammatical sense. */
631 union GTY(()) _cpp_hashnode_value {
633 cpp_macro * GTY((tag ("NTV_MACRO"))) macro;
634 /* Answers to an assertion. */
635 struct answer * GTY ((tag ("NTV_ANSWER"))) answers;
636 /* Code for a builtin macro. */
637 enum cpp_builtin_type GTY ((tag ("NTV_BUILTIN"))) builtin;
638 /* Macro argument index. */
639 unsigned short GTY ((tag ("NTV_ARGUMENT"))) arg_index;
642 struct GTY(()) cpp_hashnode {
643 struct ht_identifier ident;
644 unsigned int is_directive : 1;
645 unsigned int directive_index : 7; /* If is_directive,
646 then index into directive table.
647 Otherwise, a NODE_OPERATOR. */
648 unsigned char rid_code; /* Rid code - for front ends. */
649 ENUM_BITFIELD(node_type) type : 6; /* CPP node type. */
650 unsigned int flags : 10; /* CPP flags. */
652 union _cpp_hashnode_value GTY ((desc ("CPP_HASHNODE_VALUE_IDX (%1)"))) value;
655 /* Call this first to get a handle to pass to other functions.
657 If you want cpplib to manage its own hashtable, pass in a NULL
658 pointer. Otherwise you should pass in an initialized hash table
659 that cpplib will share; this technique is used by the C front
661 extern cpp_reader *cpp_create_reader (enum c_lang, struct ht *,
664 /* Reset the cpp_reader's line_map. This is only used after reading a
666 extern void cpp_set_line_map (cpp_reader *, struct line_maps *);
668 /* Call this to change the selected language standard (e.g. because of
669 command line options). */
670 extern void cpp_set_lang (cpp_reader *, enum c_lang);
672 /* Set the include paths. */
673 extern void cpp_set_include_chains (cpp_reader *, cpp_dir *, cpp_dir *, int);
675 /* Call these to get pointers to the options, callback, and deps
676 structures for a given reader. These pointers are good until you
677 call cpp_finish on that reader. You can either edit the callbacks
678 through the pointer returned from cpp_get_callbacks, or set them
679 with cpp_set_callbacks. */
680 extern cpp_options *cpp_get_options (cpp_reader *);
681 extern cpp_callbacks *cpp_get_callbacks (cpp_reader *);
682 extern void cpp_set_callbacks (cpp_reader *, cpp_callbacks *);
683 extern struct deps *cpp_get_deps (cpp_reader *);
685 /* This function reads the file, but does not start preprocessing. It
686 returns the name of the original file; this is the same as the
687 input file, except for preprocessed input. This will generate at
688 least one file change callback, and possibly a line change callback
689 too. If there was an error opening the file, it returns NULL. */
690 extern const char *cpp_read_main_file (cpp_reader *, const char *);
692 /* Set up built-ins with special behavior. Use cpp_init_builtins()
693 instead unless your know what you are doing. */
694 extern void cpp_init_special_builtins (cpp_reader *);
696 /* Set up built-ins like __FILE__. */
697 extern void cpp_init_builtins (cpp_reader *, int);
699 /* This is called after options have been parsed, and partially
701 extern void cpp_post_options (cpp_reader *);
703 /* Set up translation to the target character set. */
704 extern void cpp_init_iconv (cpp_reader *);
706 /* Call this to finish preprocessing. If you requested dependency
707 generation, pass an open stream to write the information to,
708 otherwise NULL. It is your responsibility to close the stream. */
709 extern void cpp_finish (cpp_reader *, FILE *deps_stream);
711 /* Call this to release the handle at the end of preprocessing. Any
712 use of the handle after this function returns is invalid. */
713 extern void cpp_destroy (cpp_reader *);
715 extern unsigned int cpp_token_len (const cpp_token *);
716 extern unsigned char *cpp_token_as_text (cpp_reader *, const cpp_token *);
717 extern unsigned char *cpp_spell_token (cpp_reader *, const cpp_token *,
718 unsigned char *, bool);
719 extern void cpp_register_pragma (cpp_reader *, const char *, const char *,
720 void (*) (cpp_reader *), bool);
721 extern void cpp_register_deferred_pragma (cpp_reader *, const char *,
722 const char *, unsigned, bool, bool);
723 extern int cpp_avoid_paste (cpp_reader *, const cpp_token *,
725 extern const cpp_token *cpp_get_token (cpp_reader *);
726 extern const cpp_token *cpp_get_token_with_location (cpp_reader *,
728 extern const unsigned char *cpp_macro_definition (cpp_reader *,
729 const cpp_hashnode *);
730 extern void _cpp_backup_tokens (cpp_reader *, unsigned int);
731 extern const cpp_token *cpp_peek_token (cpp_reader *, int);
733 /* Evaluate a CPP_*CHAR* token. */
734 extern cppchar_t cpp_interpret_charconst (cpp_reader *, const cpp_token *,
735 unsigned int *, int *);
736 /* Evaluate a vector of CPP_*STRING* tokens. */
737 extern bool cpp_interpret_string (cpp_reader *,
738 const cpp_string *, size_t,
739 cpp_string *, enum cpp_ttype);
740 extern bool cpp_interpret_string_notranslate (cpp_reader *,
741 const cpp_string *, size_t,
742 cpp_string *, enum cpp_ttype);
744 /* Convert a host character constant to the execution character set. */
745 extern cppchar_t cpp_host_to_exec_charset (cpp_reader *, cppchar_t);
747 /* Used to register macros and assertions, perhaps from the command line.
748 The text is the same as the command line argument. */
749 extern void cpp_define (cpp_reader *, const char *);
750 extern void cpp_define_formatted (cpp_reader *pfile,
751 const char *fmt, ...) ATTRIBUTE_PRINTF_2;
752 extern void cpp_assert (cpp_reader *, const char *);
753 extern void cpp_undef (cpp_reader *, const char *);
754 extern void cpp_unassert (cpp_reader *, const char *);
756 extern cpp_macro *cpp_push_definition (cpp_reader *, const char *);
757 extern void cpp_pop_definition (cpp_reader *, const char *, cpp_macro *);
759 /* Undefine all macros and assertions. */
760 extern void cpp_undef_all (cpp_reader *);
762 extern cpp_buffer *cpp_push_buffer (cpp_reader *, const unsigned char *,
764 extern int cpp_defined (cpp_reader *, const unsigned char *, int);
766 /* A preprocessing number. Code assumes that any unused high bits of
767 the double integer are set to zero. */
768 typedef unsigned HOST_WIDE_INT cpp_num_part;
769 typedef struct cpp_num cpp_num;
774 bool unsignedp; /* True if value should be treated as unsigned. */
775 bool overflow; /* True if the most recent calculation overflowed. */
778 /* cpplib provides two interfaces for interpretation of preprocessing
781 cpp_classify_number categorizes numeric constants according to
782 their field (integer, floating point, or invalid), radix (decimal,
783 octal, hexadecimal), and type suffixes. */
785 #define CPP_N_CATEGORY 0x000F
786 #define CPP_N_INVALID 0x0000
787 #define CPP_N_INTEGER 0x0001
788 #define CPP_N_FLOATING 0x0002
790 #define CPP_N_WIDTH 0x00F0
791 #define CPP_N_SMALL 0x0010 /* int, float, shrot _Fract/Accum */
792 #define CPP_N_MEDIUM 0x0020 /* long, double, long _Fract/_Accum. */
793 #define CPP_N_LARGE 0x0040 /* long long, long double,
794 long long _Fract/Accum. */
796 #define CPP_N_WIDTH_MD 0xF0000 /* machine defined. */
797 #define CPP_N_MD_W 0x10000
798 #define CPP_N_MD_Q 0x20000
800 #define CPP_N_RADIX 0x0F00
801 #define CPP_N_DECIMAL 0x0100
802 #define CPP_N_HEX 0x0200
803 #define CPP_N_OCTAL 0x0400
804 #define CPP_N_BINARY 0x0800
806 #define CPP_N_UNSIGNED 0x1000 /* Properties. */
807 #define CPP_N_IMAGINARY 0x2000
808 #define CPP_N_DFLOAT 0x4000
809 #define CPP_N_DEFAULT 0x8000
811 #define CPP_N_FRACT 0x100000 /* Fract types. */
812 #define CPP_N_ACCUM 0x200000 /* Accum types. */
814 /* Classify a CPP_NUMBER token. The return value is a combination of
815 the flags from the above sets. */
816 extern unsigned cpp_classify_number (cpp_reader *, const cpp_token *);
818 /* Evaluate a token classified as category CPP_N_INTEGER. */
819 extern cpp_num cpp_interpret_integer (cpp_reader *, const cpp_token *,
822 /* Sign extend a number, with PRECISION significant bits and all
823 others assumed clear, to fill out a cpp_num structure. */
824 cpp_num cpp_num_sign_extend (cpp_num, size_t);
826 /* Diagnostic levels. To get a diagnostic without associating a
827 position in the translation unit with it, use cpp_error_with_line
828 with a line number of zero. */
831 /* Warning, an error with -Werror. */
833 /* Same as CPP_DL_WARNING, except it is not suppressed in system headers. */
834 CPP_DL_WARNING_SYSHDR,
835 /* Warning, an error with -pedantic-errors or -Werror. */
839 /* An internal consistency check failed. Prints "internal error: ",
840 otherwise the same as CPP_DL_ERROR. */
842 /* An informative note following a warning. */
848 /* Warning reason codes. Use a reason code of zero for unclassified warnings
849 and errors that are not warnings. */
854 CPP_W_MISSING_INCLUDE_DIRS,
860 CPP_W_NUM_SIGN_CHANGE,
861 CPP_W_VARIADIC_MACROS,
862 CPP_W_BUILTIN_MACRO_REDEFINED,
866 CPP_W_CXX_OPERATOR_NAMES,
869 CPP_W_WARNING_DIRECTIVE
872 /* Output a diagnostic of some kind. */
873 extern bool cpp_error (cpp_reader *, int, const char *msgid, ...)
875 extern bool cpp_warning (cpp_reader *, int, const char *msgid, ...)
877 extern bool cpp_pedwarning (cpp_reader *, int, const char *msgid, ...)
879 extern bool cpp_warning_syshdr (cpp_reader *, int, const char *msgid, ...)
882 /* Output a diagnostic with "MSGID: " preceding the
883 error string of errno. No location is printed. */
884 extern bool cpp_errno (cpp_reader *, int, const char *msgid);
886 /* Same as cpp_error, except additionally specifies a position as a
887 (translation unit) physical line and physical column. If the line is
888 zero, then no location is printed. */
889 extern bool cpp_error_with_line (cpp_reader *, int, source_location,
890 unsigned, const char *msgid, ...)
892 extern bool cpp_warning_with_line (cpp_reader *, int, source_location,
893 unsigned, const char *msgid, ...)
895 extern bool cpp_pedwarning_with_line (cpp_reader *, int, source_location,
896 unsigned, const char *msgid, ...)
898 extern bool cpp_warning_with_line_syshdr (cpp_reader *, int, source_location,
899 unsigned, const char *msgid, ...)
903 extern int cpp_ideq (const cpp_token *, const char *);
904 extern void cpp_output_line (cpp_reader *, FILE *);
905 extern unsigned char *cpp_output_line_to_string (cpp_reader *,
906 const unsigned char *);
907 extern void cpp_output_token (const cpp_token *, FILE *);
908 extern const char *cpp_type2name (enum cpp_ttype, unsigned char flags);
909 /* Returns the value of an escape sequence, truncated to the correct
910 target precision. PSTR points to the input pointer, which is just
911 after the backslash. LIMIT is how much text we have. WIDE is true
912 if the escape sequence is part of a wide character constant or
913 string literal. Handles all relevant diagnostics. */
914 extern cppchar_t cpp_parse_escape (cpp_reader *, const unsigned char ** pstr,
915 const unsigned char *limit, int wide);
917 /* Structure used to hold a comment block at a given location in the
922 /* Text of the comment including the terminators. */
925 /* source location for the given comment. */
926 source_location sloc;
929 /* Structure holding all comments for a given cpp_reader. */
933 /* table of comment entries. */
934 cpp_comment *entries;
936 /* number of actual entries entered in the table. */
939 /* number of entries allocated currently. */
943 /* Returns the table of comments encountered by the preprocessor. This
944 table is only populated when pfile->state.save_comments is true. */
945 extern cpp_comment_table *cpp_get_comments (cpp_reader *);
949 /* Lookup an identifier in the hashtable. Puts the identifier in the
950 table if it is not already there. */
951 extern cpp_hashnode *cpp_lookup (cpp_reader *, const unsigned char *,
954 typedef int (*cpp_cb) (cpp_reader *, cpp_hashnode *, void *);
955 extern void cpp_forall_identifiers (cpp_reader *, cpp_cb, void *);
958 extern void cpp_scan_nooutput (cpp_reader *);
959 extern int cpp_sys_macro_p (cpp_reader *);
960 extern unsigned char *cpp_quote_string (unsigned char *, const unsigned char *,
964 extern bool cpp_included (cpp_reader *, const char *);
965 extern bool cpp_included_before (cpp_reader *, const char *, source_location);
966 extern void cpp_make_system_header (cpp_reader *, int, int);
967 extern bool cpp_push_include (cpp_reader *, const char *);
968 extern void cpp_change_file (cpp_reader *, enum lc_reason, const char *);
969 extern const char *cpp_get_path (struct _cpp_file *);
970 extern cpp_dir *cpp_get_dir (struct _cpp_file *);
971 extern cpp_buffer *cpp_get_buffer (cpp_reader *);
972 extern struct _cpp_file *cpp_get_file (cpp_buffer *);
973 extern cpp_buffer *cpp_get_prev (cpp_buffer *);
974 extern void cpp_clear_file_cache (cpp_reader *);
977 struct save_macro_data;
978 extern int cpp_save_state (cpp_reader *, FILE *);
979 extern int cpp_write_pch_deps (cpp_reader *, FILE *);
980 extern int cpp_write_pch_state (cpp_reader *, FILE *);
981 extern int cpp_valid_state (cpp_reader *, const char *, int);
982 extern void cpp_prepare_state (cpp_reader *, struct save_macro_data **);
983 extern int cpp_read_state (cpp_reader *, const char *, FILE *,
984 struct save_macro_data *);
986 #endif /* ! LIBCPP_CPPLIB_H */