1 /* Definitions for CPP library.
2 Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
3 2004, 2005, 2007, 2008, 2009, 2010, 2011
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 process r/R raw strings. If this is set, uliterals
319 must be set as well. */
320 unsigned char rliterals;
322 /* Nonzero means print names of header files (-H). */
323 unsigned char print_include_names;
325 /* Nonzero means complain about deprecated features. */
326 unsigned char cpp_warn_deprecated;
328 /* Nonzero means warn if slash-star appears in a comment. */
329 unsigned char warn_comments;
331 /* Nonzero means warn if a user-supplied include directory does not
333 unsigned char warn_missing_include_dirs;
335 /* Nonzero means warn if there are any trigraphs. */
336 unsigned char warn_trigraphs;
338 /* Nonzero means warn about multicharacter charconsts. */
339 unsigned char warn_multichar;
341 /* Nonzero means warn about various incompatibilities with
343 unsigned char cpp_warn_traditional;
345 /* Nonzero means warn about long long numeric constants. */
346 unsigned char cpp_warn_long_long;
348 /* Nonzero means warn about text after an #endif (or #else). */
349 unsigned char warn_endif_labels;
351 /* Nonzero means warn about implicit sign changes owing to integer
353 unsigned char warn_num_sign_change;
355 /* Zero means don't warn about __VA_ARGS__ usage in c89 pedantic mode.
356 Presumably the usage is protected by the appropriate #ifdef. */
357 unsigned char warn_variadic_macros;
359 /* Nonzero means warn about builtin macros that are redefined or
360 explicitly undefined. */
361 unsigned char warn_builtin_macro_redefined;
363 /* Nonzero means we should look for header.gcc files that remap file
367 /* Zero means dollar signs are punctuation. */
368 unsigned char dollars_in_ident;
370 /* Nonzero means UCNs are accepted in identifiers. */
371 unsigned char extended_identifiers;
373 /* True if we should warn about dollars in identifiers or numbers
374 for this translation unit. */
375 unsigned char warn_dollars;
377 /* Nonzero means warn if undefined identifiers are evaluated in an #if. */
378 unsigned char warn_undef;
380 /* Nonzero means warn of unused macros from the main file. */
381 unsigned char warn_unused_macros;
383 /* Nonzero for the 1999 C Standard, including corrigenda and amendments. */
386 /* Nonzero if we are conforming to a specific C or C++ standard. */
389 /* Nonzero means give all the error messages the ANSI standard requires. */
390 unsigned char cpp_pedantic;
392 /* Nonzero means we're looking at already preprocessed code, so don't
393 bother trying to do macro expansion and whatnot. */
394 unsigned char preprocessed;
396 /* Nonzero means handle C++ alternate operator names. */
397 unsigned char operator_names;
399 /* Nonzero means warn about use of C++ alternate operator names. */
400 unsigned char warn_cxx_operator_names;
402 /* True for traditional preprocessing. */
403 unsigned char traditional;
405 /* Holds the name of the target (execution) character set. */
406 const char *narrow_charset;
408 /* Holds the name of the target wide character set. */
409 const char *wide_charset;
411 /* Holds the name of the input character set. */
412 const char *input_charset;
414 /* The minimum permitted level of normalization before a warning
416 enum cpp_normalize_level warn_normalize;
418 /* True to warn about precompiled header files we couldn't use. */
419 bool warn_invalid_pch;
421 /* True if dependencies should be restored from a precompiled header. */
422 bool restore_pch_deps;
424 /* Dependency generation. */
427 /* Style of header dependencies to generate. */
428 enum cpp_deps_style style;
430 /* Assume missing files are generated files. */
433 /* Generate phony targets for each dependency apart from the first
437 /* If true, no dependency is generated on the main file. */
438 bool ignore_main_file;
440 /* If true, intend to use the preprocessor output (e.g., for compilation)
441 in addition to the dependency info. */
442 bool need_preprocessor_output;
445 /* Target-specific features set by the front end or client. */
447 /* Precision for target CPP arithmetic, target characters, target
448 ints and target wide characters, respectively. */
449 size_t precision, char_precision, int_precision, wchar_precision;
451 /* True means chars (wide chars) are unsigned. */
452 bool unsigned_char, unsigned_wchar;
454 /* True if the most significant byte in a word has the lowest
455 address in memory. */
456 bool bytes_big_endian;
458 /* Nonzero means __STDC__ should have the value 0 in system headers. */
459 unsigned char stdc_0_in_system_headers;
461 /* True disables tokenization outside of preprocessing directives. */
462 bool directives_only;
465 /* Callback for header lookup for HEADER, which is the name of a
466 source file. It is used as a method of last resort to find headers
467 that are not otherwise found during the normal include processing.
468 The return value is the malloced name of a header to try and open,
469 if any, or NULL otherwise. This callback is called only if the
470 header is otherwise unfound. */
471 typedef const char *(*missing_header_cb)(cpp_reader *, const char *header, cpp_dir **);
473 /* Call backs to cpplib client. */
476 /* Called when a new line of preprocessed output is started. */
477 void (*line_change) (cpp_reader *, const cpp_token *, int);
479 /* Called when switching to/from a new file.
480 The line_map is for the new file. It is NULL if there is no new file.
481 (In C this happens when done with <built-in>+<command line> and also
482 when done with a main file.) This can be used for resource cleanup. */
483 void (*file_change) (cpp_reader *, const struct line_map *);
485 void (*dir_change) (cpp_reader *, const char *);
486 void (*include) (cpp_reader *, source_location, const unsigned char *,
487 const char *, int, const cpp_token **);
488 void (*define) (cpp_reader *, source_location, cpp_hashnode *);
489 void (*undef) (cpp_reader *, source_location, cpp_hashnode *);
490 void (*ident) (cpp_reader *, source_location, const cpp_string *);
491 void (*def_pragma) (cpp_reader *, source_location);
492 int (*valid_pch) (cpp_reader *, const char *, int);
493 void (*read_pch) (cpp_reader *, const char *, int, const char *);
494 missing_header_cb missing_header;
496 /* Context-sensitive macro support. Returns macro (if any) that should
498 cpp_hashnode * (*macro_to_expand) (cpp_reader *, const cpp_token *);
500 /* Called to emit a diagnostic. This callback receives the
501 translated message. */
502 bool (*error) (cpp_reader *, int, int, source_location, unsigned int,
503 const char *, va_list *)
504 ATTRIBUTE_FPTR_PRINTF(6,0);
506 /* Callbacks for when a macro is expanded, or tested (whether
507 defined or not at the time) in #ifdef, #ifndef or "defined". */
508 void (*used_define) (cpp_reader *, source_location, cpp_hashnode *);
509 void (*used_undef) (cpp_reader *, source_location, cpp_hashnode *);
510 /* Called before #define and #undef or other macro definition
511 changes are processed. */
512 void (*before_define) (cpp_reader *);
513 /* Called whenever a macro is expanded or tested.
514 Second argument is the location of the start of the current expansion. */
515 void (*used) (cpp_reader *, source_location, cpp_hashnode *);
517 /* Callback that can change a user builtin into normal macro. */
518 bool (*user_builtin_macro) (cpp_reader *, cpp_hashnode *);
522 #define INO_T_CPP ino_t ino[3]
524 #define INO_T_CPP ino_t ino
527 /* Chain of directories to look for include files in. */
530 /* NULL-terminated singly-linked list. */
531 struct cpp_dir *next;
533 /* NAME of the directory, NUL-terminated. */
537 /* One if a system header, two if a system header that has extern
538 "C" guards for C++. */
541 /* Is this a user-supplied directory? */
542 bool user_supplied_p;
544 /* The canonicalized NAME as determined by lrealpath. This field
545 is only used by hosts that lack reliable inode numbers. */
546 char *canonical_name;
548 /* Mapping of file names for this directory for MS-DOS and related
549 platforms. A NULL-terminated array of (from, to) pairs. */
550 const char **name_map;
552 /* Routine to construct pathname, given the search path name and the
553 HEADER we are trying to find, return a constructed pathname to
554 try and open. If this is NULL, the constructed pathname is as
555 constructed by append_file_to_dir. */
556 char *(*construct) (const char *header, cpp_dir *dir);
558 /* The C front end uses these to recognize duplicated
559 directories in the search path. */
564 /* The structure of a node in the hash table. The hash table has
565 entries for all identifiers: either macros defined by #define
566 commands (type NT_MACRO), assertions created with #assert
567 (NT_ASSERTION), or neither of the above (NT_VOID). Builtin macros
568 like __LINE__ are flagged NODE_BUILTIN. Poisoned identifiers are
569 flagged NODE_POISONED. NODE_OPERATOR (C++ only) indicates an
570 identifier that behaves like an operator such as "xor".
571 NODE_DIAGNOSTIC is for speed in lex_token: it indicates a
572 diagnostic may be required for this node. Currently this only
573 applies to __VA_ARGS__, poisoned identifiers, and -Wc++-compat
574 warnings about NODE_OPERATOR. */
576 /* Hash node flags. */
577 #define NODE_OPERATOR (1 << 0) /* C++ named operator. */
578 #define NODE_POISONED (1 << 1) /* Poisoned identifier. */
579 #define NODE_BUILTIN (1 << 2) /* Builtin macro. */
580 #define NODE_DIAGNOSTIC (1 << 3) /* Possible diagnostic when lexed. */
581 #define NODE_WARN (1 << 4) /* Warn if redefined or undefined. */
582 #define NODE_DISABLED (1 << 5) /* A disabled macro. */
583 #define NODE_MACRO_ARG (1 << 6) /* Used during #define processing. */
584 #define NODE_USED (1 << 7) /* Dumped with -dU. */
585 #define NODE_CONDITIONAL (1 << 8) /* Conditional macro */
586 #define NODE_WARN_OPERATOR (1 << 9) /* Warn about C++ named operator. */
588 /* Different flavors of hash node. */
591 NT_VOID = 0, /* No definition yet. */
592 NT_MACRO, /* A macro of some form. */
593 NT_ASSERTION /* Predicate for #assert. */
596 /* Different flavors of builtin macro. _Pragma is an operator, but we
597 handle it with the builtin code for efficiency reasons. */
598 enum cpp_builtin_type
600 BT_SPECLINE = 0, /* `__LINE__' */
601 BT_DATE, /* `__DATE__' */
602 BT_FILE, /* `__FILE__' */
603 BT_BASE_FILE, /* `__BASE_FILE__' */
604 BT_INCLUDE_LEVEL, /* `__INCLUDE_LEVEL__' */
605 BT_TIME, /* `__TIME__' */
606 BT_STDC, /* `__STDC__' */
607 BT_PRAGMA, /* `_Pragma' operator */
608 BT_TIMESTAMP, /* `__TIMESTAMP__' */
609 BT_COUNTER, /* `__COUNTER__' */
610 BT_FIRST_USER, /* User defined builtin macros. */
611 BT_LAST_USER = BT_FIRST_USER + 31
614 #define CPP_HASHNODE(HNODE) ((cpp_hashnode *) (HNODE))
615 #define HT_NODE(NODE) ((ht_identifier *) (NODE))
616 #define NODE_LEN(NODE) HT_LEN (&(NODE)->ident)
617 #define NODE_NAME(NODE) HT_STR (&(NODE)->ident)
619 /* Specify which field, if any, of the union is used. */
629 #define CPP_HASHNODE_VALUE_IDX(HNODE) \
630 ((HNODE.flags & NODE_MACRO_ARG) ? NTV_ARGUMENT \
631 : HNODE.type == NT_MACRO ? ((HNODE.flags & NODE_BUILTIN) \
632 ? NTV_BUILTIN : NTV_MACRO) \
633 : HNODE.type == NT_ASSERTION ? NTV_ANSWER \
636 /* The common part of an identifier node shared amongst all 3 C front
637 ends. Also used to store CPP identifiers, which are a superset of
638 identifiers in the grammatical sense. */
640 union GTY(()) _cpp_hashnode_value {
642 cpp_macro * GTY((tag ("NTV_MACRO"))) macro;
643 /* Answers to an assertion. */
644 struct answer * GTY ((tag ("NTV_ANSWER"))) answers;
645 /* Code for a builtin macro. */
646 enum cpp_builtin_type GTY ((tag ("NTV_BUILTIN"))) builtin;
647 /* Macro argument index. */
648 unsigned short GTY ((tag ("NTV_ARGUMENT"))) arg_index;
651 struct GTY(()) cpp_hashnode {
652 struct ht_identifier ident;
653 unsigned int is_directive : 1;
654 unsigned int directive_index : 7; /* If is_directive,
655 then index into directive table.
656 Otherwise, a NODE_OPERATOR. */
657 unsigned char rid_code; /* Rid code - for front ends. */
658 ENUM_BITFIELD(node_type) type : 6; /* CPP node type. */
659 unsigned int flags : 10; /* CPP flags. */
661 union _cpp_hashnode_value GTY ((desc ("CPP_HASHNODE_VALUE_IDX (%1)"))) value;
664 /* Call this first to get a handle to pass to other functions.
666 If you want cpplib to manage its own hashtable, pass in a NULL
667 pointer. Otherwise you should pass in an initialized hash table
668 that cpplib will share; this technique is used by the C front
670 extern cpp_reader *cpp_create_reader (enum c_lang, struct ht *,
673 /* Reset the cpp_reader's line_map. This is only used after reading a
675 extern void cpp_set_line_map (cpp_reader *, struct line_maps *);
677 /* Call this to change the selected language standard (e.g. because of
678 command line options). */
679 extern void cpp_set_lang (cpp_reader *, enum c_lang);
681 /* Set the include paths. */
682 extern void cpp_set_include_chains (cpp_reader *, cpp_dir *, cpp_dir *, int);
684 /* Call these to get pointers to the options, callback, and deps
685 structures for a given reader. These pointers are good until you
686 call cpp_finish on that reader. You can either edit the callbacks
687 through the pointer returned from cpp_get_callbacks, or set them
688 with cpp_set_callbacks. */
689 extern cpp_options *cpp_get_options (cpp_reader *);
690 extern cpp_callbacks *cpp_get_callbacks (cpp_reader *);
691 extern void cpp_set_callbacks (cpp_reader *, cpp_callbacks *);
692 extern struct deps *cpp_get_deps (cpp_reader *);
694 /* This function reads the file, but does not start preprocessing. It
695 returns the name of the original file; this is the same as the
696 input file, except for preprocessed input. This will generate at
697 least one file change callback, and possibly a line change callback
698 too. If there was an error opening the file, it returns NULL. */
699 extern const char *cpp_read_main_file (cpp_reader *, const char *);
701 /* Set up built-ins with special behavior. Use cpp_init_builtins()
702 instead unless your know what you are doing. */
703 extern void cpp_init_special_builtins (cpp_reader *);
705 /* Set up built-ins like __FILE__. */
706 extern void cpp_init_builtins (cpp_reader *, int);
708 /* This is called after options have been parsed, and partially
710 extern void cpp_post_options (cpp_reader *);
712 /* Set up translation to the target character set. */
713 extern void cpp_init_iconv (cpp_reader *);
715 /* Call this to finish preprocessing. If you requested dependency
716 generation, pass an open stream to write the information to,
717 otherwise NULL. It is your responsibility to close the stream. */
718 extern void cpp_finish (cpp_reader *, FILE *deps_stream);
720 /* Call this to release the handle at the end of preprocessing. Any
721 use of the handle after this function returns is invalid. */
722 extern void cpp_destroy (cpp_reader *);
724 extern unsigned int cpp_token_len (const cpp_token *);
725 extern unsigned char *cpp_token_as_text (cpp_reader *, const cpp_token *);
726 extern unsigned char *cpp_spell_token (cpp_reader *, const cpp_token *,
727 unsigned char *, bool);
728 extern void cpp_register_pragma (cpp_reader *, const char *, const char *,
729 void (*) (cpp_reader *), bool);
730 extern void cpp_register_deferred_pragma (cpp_reader *, const char *,
731 const char *, unsigned, bool, bool);
732 extern int cpp_avoid_paste (cpp_reader *, const cpp_token *,
734 extern const cpp_token *cpp_get_token (cpp_reader *);
735 extern const cpp_token *cpp_get_token_with_location (cpp_reader *,
737 extern const unsigned char *cpp_macro_definition (cpp_reader *,
739 extern void _cpp_backup_tokens (cpp_reader *, unsigned int);
740 extern const cpp_token *cpp_peek_token (cpp_reader *, int);
742 /* Evaluate a CPP_*CHAR* token. */
743 extern cppchar_t cpp_interpret_charconst (cpp_reader *, const cpp_token *,
744 unsigned int *, int *);
745 /* Evaluate a vector of CPP_*STRING* tokens. */
746 extern bool cpp_interpret_string (cpp_reader *,
747 const cpp_string *, size_t,
748 cpp_string *, enum cpp_ttype);
749 extern bool cpp_interpret_string_notranslate (cpp_reader *,
750 const cpp_string *, size_t,
751 cpp_string *, enum cpp_ttype);
753 /* Convert a host character constant to the execution character set. */
754 extern cppchar_t cpp_host_to_exec_charset (cpp_reader *, cppchar_t);
756 /* Used to register macros and assertions, perhaps from the command line.
757 The text is the same as the command line argument. */
758 extern void cpp_define (cpp_reader *, const char *);
759 extern void cpp_define_formatted (cpp_reader *pfile,
760 const char *fmt, ...) ATTRIBUTE_PRINTF_2;
761 extern void cpp_assert (cpp_reader *, const char *);
762 extern void cpp_undef (cpp_reader *, const char *);
763 extern void cpp_unassert (cpp_reader *, const char *);
765 /* Undefine all macros and assertions. */
766 extern void cpp_undef_all (cpp_reader *);
768 extern cpp_buffer *cpp_push_buffer (cpp_reader *, const unsigned char *,
770 extern int cpp_defined (cpp_reader *, const unsigned char *, int);
772 /* A preprocessing number. Code assumes that any unused high bits of
773 the double integer are set to zero. */
774 typedef unsigned HOST_WIDE_INT cpp_num_part;
775 typedef struct cpp_num cpp_num;
780 bool unsignedp; /* True if value should be treated as unsigned. */
781 bool overflow; /* True if the most recent calculation overflowed. */
784 /* cpplib provides two interfaces for interpretation of preprocessing
787 cpp_classify_number categorizes numeric constants according to
788 their field (integer, floating point, or invalid), radix (decimal,
789 octal, hexadecimal), and type suffixes. */
791 #define CPP_N_CATEGORY 0x000F
792 #define CPP_N_INVALID 0x0000
793 #define CPP_N_INTEGER 0x0001
794 #define CPP_N_FLOATING 0x0002
796 #define CPP_N_WIDTH 0x00F0
797 #define CPP_N_SMALL 0x0010 /* int, float, shrot _Fract/Accum */
798 #define CPP_N_MEDIUM 0x0020 /* long, double, long _Fract/_Accum. */
799 #define CPP_N_LARGE 0x0040 /* long long, long double,
800 long long _Fract/Accum. */
802 #define CPP_N_WIDTH_MD 0xF0000 /* machine defined. */
803 #define CPP_N_MD_W 0x10000
804 #define CPP_N_MD_Q 0x20000
806 #define CPP_N_RADIX 0x0F00
807 #define CPP_N_DECIMAL 0x0100
808 #define CPP_N_HEX 0x0200
809 #define CPP_N_OCTAL 0x0400
810 #define CPP_N_BINARY 0x0800
812 #define CPP_N_UNSIGNED 0x1000 /* Properties. */
813 #define CPP_N_IMAGINARY 0x2000
814 #define CPP_N_DFLOAT 0x4000
815 #define CPP_N_DEFAULT 0x8000
817 #define CPP_N_FRACT 0x100000 /* Fract types. */
818 #define CPP_N_ACCUM 0x200000 /* Accum types. */
820 /* Classify a CPP_NUMBER token. The return value is a combination of
821 the flags from the above sets. */
822 extern unsigned cpp_classify_number (cpp_reader *, const cpp_token *);
824 /* Evaluate a token classified as category CPP_N_INTEGER. */
825 extern cpp_num cpp_interpret_integer (cpp_reader *, const cpp_token *,
828 /* Sign extend a number, with PRECISION significant bits and all
829 others assumed clear, to fill out a cpp_num structure. */
830 cpp_num cpp_num_sign_extend (cpp_num, size_t);
832 /* Diagnostic levels. To get a diagnostic without associating a
833 position in the translation unit with it, use cpp_error_with_line
834 with a line number of zero. */
837 /* Warning, an error with -Werror. */
839 /* Same as CPP_DL_WARNING, except it is not suppressed in system headers. */
840 CPP_DL_WARNING_SYSHDR,
841 /* Warning, an error with -pedantic-errors or -Werror. */
845 /* An internal consistency check failed. Prints "internal error: ",
846 otherwise the same as CPP_DL_ERROR. */
848 /* An informative note following a warning. */
854 /* Warning reason codes. Use a reason code of zero for unclassified warnings
855 and errors that are not warnings. */
860 CPP_W_MISSING_INCLUDE_DIRS,
866 CPP_W_NUM_SIGN_CHANGE,
867 CPP_W_VARIADIC_MACROS,
868 CPP_W_BUILTIN_MACRO_REDEFINED,
872 CPP_W_CXX_OPERATOR_NAMES,
875 CPP_W_WARNING_DIRECTIVE
878 /* Output a diagnostic of some kind. */
879 extern bool cpp_error (cpp_reader *, int, const char *msgid, ...)
881 extern bool cpp_warning (cpp_reader *, int, const char *msgid, ...)
883 extern bool cpp_pedwarning (cpp_reader *, int, const char *msgid, ...)
885 extern bool cpp_warning_syshdr (cpp_reader *, int, const char *msgid, ...)
888 /* Output a diagnostic with "MSGID: " preceding the
889 error string of errno. No location is printed. */
890 extern bool cpp_errno (cpp_reader *, int, const char *msgid);
892 /* Same as cpp_error, except additionally specifies a position as a
893 (translation unit) physical line and physical column. If the line is
894 zero, then no location is printed. */
895 extern bool cpp_error_with_line (cpp_reader *, int, source_location,
896 unsigned, const char *msgid, ...)
898 extern bool cpp_warning_with_line (cpp_reader *, int, source_location,
899 unsigned, const char *msgid, ...)
901 extern bool cpp_pedwarning_with_line (cpp_reader *, int, source_location,
902 unsigned, const char *msgid, ...)
904 extern bool cpp_warning_with_line_syshdr (cpp_reader *, int, source_location,
905 unsigned, const char *msgid, ...)
909 extern int cpp_ideq (const cpp_token *, const char *);
910 extern void cpp_output_line (cpp_reader *, FILE *);
911 extern unsigned char *cpp_output_line_to_string (cpp_reader *,
912 const unsigned char *);
913 extern void cpp_output_token (const cpp_token *, FILE *);
914 extern const char *cpp_type2name (enum cpp_ttype, unsigned char flags);
915 /* Returns the value of an escape sequence, truncated to the correct
916 target precision. PSTR points to the input pointer, which is just
917 after the backslash. LIMIT is how much text we have. WIDE is true
918 if the escape sequence is part of a wide character constant or
919 string literal. Handles all relevant diagnostics. */
920 extern cppchar_t cpp_parse_escape (cpp_reader *, const unsigned char ** pstr,
921 const unsigned char *limit, int wide);
923 /* Structure used to hold a comment block at a given location in the
928 /* Text of the comment including the terminators. */
931 /* source location for the given comment. */
932 source_location sloc;
935 /* Structure holding all comments for a given cpp_reader. */
939 /* table of comment entries. */
940 cpp_comment *entries;
942 /* number of actual entries entered in the table. */
945 /* number of entries allocated currently. */
949 /* Returns the table of comments encountered by the preprocessor. This
950 table is only populated when pfile->state.save_comments is true. */
951 extern cpp_comment_table *cpp_get_comments (cpp_reader *);
955 /* Lookup an identifier in the hashtable. Puts the identifier in the
956 table if it is not already there. */
957 extern cpp_hashnode *cpp_lookup (cpp_reader *, const unsigned char *,
960 typedef int (*cpp_cb) (cpp_reader *, cpp_hashnode *, void *);
961 extern void cpp_forall_identifiers (cpp_reader *, cpp_cb, void *);
964 extern void cpp_scan_nooutput (cpp_reader *);
965 extern int cpp_sys_macro_p (cpp_reader *);
966 extern unsigned char *cpp_quote_string (unsigned char *, const unsigned char *,
970 extern bool cpp_included (cpp_reader *, const char *);
971 extern bool cpp_included_before (cpp_reader *, const char *, source_location);
972 extern void cpp_make_system_header (cpp_reader *, int, int);
973 extern bool cpp_push_include (cpp_reader *, const char *);
974 extern void cpp_change_file (cpp_reader *, enum lc_reason, const char *);
975 extern const char *cpp_get_path (struct _cpp_file *);
976 extern cpp_dir *cpp_get_dir (struct _cpp_file *);
977 extern cpp_buffer *cpp_get_buffer (cpp_reader *);
978 extern struct _cpp_file *cpp_get_file (cpp_buffer *);
979 extern cpp_buffer *cpp_get_prev (cpp_buffer *);
980 extern void cpp_clear_file_cache (cpp_reader *);
983 struct save_macro_data;
984 extern int cpp_save_state (cpp_reader *, FILE *);
985 extern int cpp_write_pch_deps (cpp_reader *, FILE *);
986 extern int cpp_write_pch_state (cpp_reader *, FILE *);
987 extern int cpp_valid_state (cpp_reader *, const char *, int);
988 extern void cpp_prepare_state (cpp_reader *, struct save_macro_data **);
989 extern int cpp_read_state (cpp_reader *, const char *, FILE *,
990 struct save_macro_data *);
992 #endif /* ! LIBCPP_CPPLIB_H */