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>
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(OBJC_STRING, LITERAL) /* @"string" - Objective-C */ \
131 TK(HEADER_NAME, LITERAL) /* <stdio.h> in #include */ \
133 TK(COMMENT, LITERAL) /* Only if output comments. */ \
134 /* SPELL_LITERAL happens to DTRT. */ \
135 TK(MACRO_ARG, NONE) /* Macro argument. */ \
136 TK(PRAGMA, NONE) /* Only for deferred pragmas. */ \
137 TK(PRAGMA_EOL, NONE) /* End-of-line for deferred pragmas. */ \
138 TK(PADDING, NONE) /* Whitespace for -E. */
140 #define OP(e, s) CPP_ ## e,
141 #define TK(e, s) CPP_ ## e,
147 /* Positions in the table. */
148 CPP_LAST_EQ = CPP_LSHIFT,
149 CPP_FIRST_DIGRAPH = CPP_HASH,
150 CPP_LAST_PUNCTUATOR= CPP_ATSIGN,
151 CPP_LAST_CPP_OP = CPP_LESS_EQ
156 /* C language kind, used when calling cpp_create_reader. */
157 enum c_lang {CLK_GNUC89 = 0, CLK_GNUC99, CLK_STDC89, CLK_STDC94, CLK_STDC99,
158 CLK_GNUCXX, CLK_CXX98, CLK_GNUCXX0X, CLK_CXX0X, CLK_ASM};
160 /* Payload of a NUMBER, STRING, CHAR or COMMENT token. */
161 struct GTY(()) cpp_string {
163 const unsigned char *text;
166 /* Flags for the cpp_token structure. */
167 #define PREV_WHITE (1 << 0) /* If whitespace before this token. */
168 #define DIGRAPH (1 << 1) /* If it was a digraph. */
169 #define STRINGIFY_ARG (1 << 2) /* If macro argument to be stringified. */
170 #define PASTE_LEFT (1 << 3) /* If on LHS of a ## operator. */
171 #define NAMED_OP (1 << 4) /* C++ named operators. */
172 #define NO_EXPAND (1 << 5) /* Do not macro-expand this token. */
173 #define BOL (1 << 6) /* Token at beginning of line. */
174 #define PURE_ZERO (1 << 7) /* Single 0 digit, used by the C++ frontend,
176 #define SP_DIGRAPH (1 << 8) /* # or ## token was a digraph. */
177 #define SP_PREV_WHITE (1 << 9) /* If whitespace before a ##
178 operator, or before this token
179 after a # operator. */
181 /* Specify which field, if any, of the cpp_token union is used. */
183 enum cpp_token_fld_kind {
185 CPP_TOKEN_FLD_SOURCE,
187 CPP_TOKEN_FLD_ARG_NO,
188 CPP_TOKEN_FLD_TOKEN_NO,
189 CPP_TOKEN_FLD_PRAGMA,
193 /* A macro argument in the cpp_token union. */
194 struct GTY(()) cpp_macro_arg {
195 /* Argument number. */
199 /* An identifier in the cpp_token union. */
200 struct GTY(()) cpp_identifier {
201 /* The canonical (UTF-8) spelling of the identifier. */
203 GTY ((nested_ptr (union tree_node,
204 "%h ? CPP_HASHNODE (GCC_IDENT_TO_HT_IDENT (%h)) : NULL",
205 "%h ? HT_IDENT_TO_GCC_IDENT (HT_NODE (%h)) : NULL")))
209 /* A preprocessing token. This has been carefully packed and should
210 occupy 16 bytes on 32-bit hosts and 24 bytes on 64-bit hosts. */
211 struct GTY(()) cpp_token {
212 source_location src_loc; /* Location of first char of token. */
213 ENUM_BITFIELD(cpp_ttype) type : CHAR_BIT; /* token type */
214 unsigned short flags; /* flags - see above */
219 struct cpp_identifier GTY ((tag ("CPP_TOKEN_FLD_NODE"))) node;
221 /* Inherit padding from this token. */
222 cpp_token * GTY ((tag ("CPP_TOKEN_FLD_SOURCE"))) source;
224 /* A string, or number. */
225 struct cpp_string GTY ((tag ("CPP_TOKEN_FLD_STR"))) str;
227 /* Argument no. for a CPP_MACRO_ARG. */
228 struct cpp_macro_arg GTY ((tag ("CPP_TOKEN_FLD_ARG_NO"))) macro_arg;
230 /* Original token no. for a CPP_PASTE (from a sequence of
231 consecutive paste tokens in a macro expansion). */
232 unsigned int GTY ((tag ("CPP_TOKEN_FLD_TOKEN_NO"))) token_no;
234 /* Caller-supplied identifier for a CPP_PRAGMA. */
235 unsigned int GTY ((tag ("CPP_TOKEN_FLD_PRAGMA"))) pragma;
236 } GTY ((desc ("cpp_token_val_index (&%1)"))) val;
239 /* Say which field is in use. */
240 extern enum cpp_token_fld_kind cpp_token_val_index (cpp_token *tok);
242 /* A type wide enough to hold any multibyte source character.
243 cpplib's character constant interpreter requires an unsigned type.
244 Also, a typedef for the signed equivalent.
245 The width of this type is capped at 32 bits; there do exist targets
246 where wchar_t is 64 bits, but only in a non-default mode, and there
247 would be no meaningful interpretation for a wchar_t value greater
248 than 2^32 anyway -- the widest wide-character encoding around is
249 ISO 10646, which stops at 2^31. */
250 #if CHAR_BIT * SIZEOF_INT >= 32
251 # define CPPCHAR_SIGNED_T int
252 #elif CHAR_BIT * SIZEOF_LONG >= 32
253 # define CPPCHAR_SIGNED_T long
255 # error "Cannot find a least-32-bit signed integer type"
257 typedef unsigned CPPCHAR_SIGNED_T cppchar_t;
258 typedef CPPCHAR_SIGNED_T cppchar_signed_t;
260 /* Style of header dependencies to generate. */
261 enum cpp_deps_style { DEPS_NONE = 0, DEPS_USER, DEPS_SYSTEM };
263 /* The possible normalization levels, from most restrictive to least. */
264 enum cpp_normalize_level {
269 /* In NFC, except for subsequences where being in NFC would make
270 the identifier invalid. */
271 normalized_identifier_C,
272 /* Not normalized at all. */
276 /* This structure is nested inside struct cpp_reader, and
277 carries all the options visible to the command line. */
280 /* Characters between tab stops. */
281 unsigned int tabstop;
283 /* The language we're preprocessing. */
286 /* Nonzero means use extra default include directories for C++. */
287 unsigned char cplusplus;
289 /* Nonzero means handle cplusplus style comments. */
290 unsigned char cplusplus_comments;
292 /* Nonzero means define __OBJC__, treat @ as a special token, use
293 the OBJC[PLUS]_INCLUDE_PATH environment variable, and allow
297 /* Nonzero means don't copy comments into the output file. */
298 unsigned char discard_comments;
300 /* Nonzero means don't copy comments into the output file during
302 unsigned char discard_comments_in_macro_exp;
304 /* Nonzero means process the ISO trigraph sequences. */
305 unsigned char trigraphs;
307 /* Nonzero means process the ISO digraph sequences. */
308 unsigned char digraphs;
310 /* Nonzero means to allow hexadecimal floats and LL suffixes. */
311 unsigned char extended_numbers;
313 /* Nonzero means process u/U prefix literals (UTF-16/32). */
314 unsigned char uliterals;
316 /* Nonzero means print names of header files (-H). */
317 unsigned char print_include_names;
319 /* Nonzero means complain about deprecated features. */
320 unsigned char warn_deprecated;
322 /* Nonzero means warn if slash-star appears in a comment. */
323 unsigned char warn_comments;
325 /* Nonzero means warn if a user-supplied include directory does not
327 unsigned char warn_missing_include_dirs;
329 /* Nonzero means warn if there are any trigraphs. */
330 unsigned char warn_trigraphs;
332 /* Nonzero means warn about multicharacter charconsts. */
333 unsigned char warn_multichar;
335 /* Nonzero means warn about various incompatibilities with
337 unsigned char warn_traditional;
339 /* Nonzero means warn about long long numeric constants. */
340 unsigned char warn_long_long;
342 /* Nonzero means warn about text after an #endif (or #else). */
343 unsigned char warn_endif_labels;
345 /* Nonzero means warn about implicit sign changes owing to integer
347 unsigned char warn_num_sign_change;
349 /* Zero means don't warn about __VA_ARGS__ usage in c89 pedantic mode.
350 Presumably the usage is protected by the appropriate #ifdef. */
351 unsigned char warn_variadic_macros;
353 /* Nonzero means warn about builtin macros that are redefined or
354 explicitly undefined. */
355 unsigned char warn_builtin_macro_redefined;
357 /* Nonzero means we should look for header.gcc files that remap file
361 /* Zero means dollar signs are punctuation. */
362 unsigned char dollars_in_ident;
364 /* Nonzero means UCNs are accepted in identifiers. */
365 unsigned char extended_identifiers;
367 /* True if we should warn about dollars in identifiers or numbers
368 for this translation unit. */
369 unsigned char warn_dollars;
371 /* Nonzero means warn if undefined identifiers are evaluated in an #if. */
372 unsigned char warn_undef;
374 /* Nonzero means warn of unused macros from the main file. */
375 unsigned char warn_unused_macros;
377 /* Nonzero for the 1999 C Standard, including corrigenda and amendments. */
380 /* Nonzero if we are conforming to a specific C or C++ standard. */
383 /* Nonzero means give all the error messages the ANSI standard requires. */
384 unsigned char pedantic;
386 /* Nonzero means we're looking at already preprocessed code, so don't
387 bother trying to do macro expansion and whatnot. */
388 unsigned char preprocessed;
390 /* Print column number in error messages. */
391 unsigned char show_column;
393 /* Nonzero means handle C++ alternate operator names. */
394 unsigned char operator_names;
396 /* Nonzero means warn about use of C++ alternate operator names. */
397 unsigned char warn_cxx_operator_names;
399 /* True for traditional preprocessing. */
400 unsigned char traditional;
402 /* Holds the name of the target (execution) character set. */
403 const char *narrow_charset;
405 /* Holds the name of the target wide character set. */
406 const char *wide_charset;
408 /* Holds the name of the input character set. */
409 const char *input_charset;
411 /* The minimum permitted level of normalization before a warning
413 enum cpp_normalize_level warn_normalize;
415 /* True to warn about precompiled header files we couldn't use. */
416 bool warn_invalid_pch;
418 /* True if dependencies should be restored from a precompiled header. */
419 bool restore_pch_deps;
421 /* Dependency generation. */
424 /* Style of header dependencies to generate. */
425 enum cpp_deps_style style;
427 /* Assume missing files are generated files. */
430 /* Generate phony targets for each dependency apart from the first
434 /* If true, no dependency is generated on the main file. */
435 bool ignore_main_file;
438 /* Target-specific features set by the front end or client. */
440 /* Precision for target CPP arithmetic, target characters, target
441 ints and target wide characters, respectively. */
442 size_t precision, char_precision, int_precision, wchar_precision;
444 /* True means chars (wide chars) are unsigned. */
445 bool unsigned_char, unsigned_wchar;
447 /* True if the most significant byte in a word has the lowest
448 address in memory. */
449 bool bytes_big_endian;
451 /* Nonzero means __STDC__ should have the value 0 in system headers. */
452 unsigned char stdc_0_in_system_headers;
454 /* True disables tokenization outside of preprocessing directives. */
455 bool directives_only;
458 /* Callback for header lookup for HEADER, which is the name of a
459 source file. It is used as a method of last resort to find headers
460 that are not otherwise found during the normal include processing.
461 The return value is the malloced name of a header to try and open,
462 if any, or NULL otherwise. This callback is called only if the
463 header is otherwise unfound. */
464 typedef const char *(*missing_header_cb)(cpp_reader *, const char *header, cpp_dir **);
466 /* Call backs to cpplib client. */
469 /* Called when a new line of preprocessed output is started. */
470 void (*line_change) (cpp_reader *, const cpp_token *, int);
472 /* Called when switching to/from a new file.
473 The line_map is for the new file. It is NULL if there is no new file.
474 (In C this happens when done with <built-in>+<command line> and also
475 when done with a main file.) This can be used for resource cleanup. */
476 void (*file_change) (cpp_reader *, const struct line_map *);
478 void (*dir_change) (cpp_reader *, const char *);
479 void (*include) (cpp_reader *, unsigned int, const unsigned char *,
480 const char *, int, const cpp_token **);
481 void (*define) (cpp_reader *, unsigned int, cpp_hashnode *);
482 void (*undef) (cpp_reader *, unsigned int, cpp_hashnode *);
483 void (*ident) (cpp_reader *, unsigned int, const cpp_string *);
484 void (*def_pragma) (cpp_reader *, unsigned int);
485 int (*valid_pch) (cpp_reader *, const char *, int);
486 void (*read_pch) (cpp_reader *, const char *, int, const char *);
487 missing_header_cb missing_header;
489 /* Context-sensitive macro support. Returns macro (if any) that should
491 cpp_hashnode * (*macro_to_expand) (cpp_reader *, const cpp_token *);
493 /* Called to emit a diagnostic. This callback receives the
494 translated message. */
495 bool (*error) (cpp_reader *, int, source_location, unsigned int,
496 const char *, va_list *)
497 ATTRIBUTE_FPTR_PRINTF(5,0);
499 /* Callbacks for when a macro is expanded, or tested (whether
500 defined or not at the time) in #ifdef, #ifndef or "defined". */
501 void (*used_define) (cpp_reader *, unsigned int, cpp_hashnode *);
502 void (*used_undef) (cpp_reader *, unsigned int, cpp_hashnode *);
503 /* Called before #define and #undef or other macro definition
504 changes are processed. */
505 void (*before_define) (cpp_reader *);
508 /* Chain of directories to look for include files in. */
511 /* NULL-terminated singly-linked list. */
512 struct cpp_dir *next;
514 /* NAME of the directory, NUL-terminated. */
518 /* One if a system header, two if a system header that has extern
519 "C" guards for C++. */
522 /* Is this a user-supplied directory? */
523 bool user_supplied_p;
525 /* The canonicalized NAME as determined by lrealpath. This field
526 is only used by hosts that lack reliable inode numbers. */
527 char *canonical_name;
529 /* Mapping of file names for this directory for MS-DOS and related
530 platforms. A NULL-terminated array of (from, to) pairs. */
531 const char **name_map;
533 /* Routine to construct pathname, given the search path name and the
534 HEADER we are trying to find, return a constructed pathname to
535 try and open. If this is NULL, the constructed pathname is as
536 constructed by append_file_to_dir. */
537 char *(*construct) (const char *header, cpp_dir *dir);
539 /* The C front end uses these to recognize duplicated
540 directories in the search path. */
545 /* The structure of a node in the hash table. The hash table has
546 entries for all identifiers: either macros defined by #define
547 commands (type NT_MACRO), assertions created with #assert
548 (NT_ASSERTION), or neither of the above (NT_VOID). Builtin macros
549 like __LINE__ are flagged NODE_BUILTIN. Poisoned identifiers are
550 flagged NODE_POISONED. NODE_OPERATOR (C++ only) indicates an
551 identifier that behaves like an operator such as "xor".
552 NODE_DIAGNOSTIC is for speed in lex_token: it indicates a
553 diagnostic may be required for this node. Currently this only
554 applies to __VA_ARGS__, poisoned identifiers, and -Wc++-compat
555 warnings about NODE_OPERATOR. */
557 /* Hash node flags. */
558 #define NODE_OPERATOR (1 << 0) /* C++ named operator. */
559 #define NODE_POISONED (1 << 1) /* Poisoned identifier. */
560 #define NODE_BUILTIN (1 << 2) /* Builtin macro. */
561 #define NODE_DIAGNOSTIC (1 << 3) /* Possible diagnostic when lexed. */
562 #define NODE_WARN (1 << 4) /* Warn if redefined or undefined. */
563 #define NODE_DISABLED (1 << 5) /* A disabled macro. */
564 #define NODE_MACRO_ARG (1 << 6) /* Used during #define processing. */
565 #define NODE_USED (1 << 7) /* Dumped with -dU. */
566 #define NODE_CONDITIONAL (1 << 8) /* Conditional macro */
567 #define NODE_WARN_OPERATOR (1 << 9) /* Warn about C++ named operator. */
569 /* Different flavors of hash node. */
572 NT_VOID = 0, /* No definition yet. */
573 NT_MACRO, /* A macro of some form. */
574 NT_ASSERTION /* Predicate for #assert. */
577 /* Different flavors of builtin macro. _Pragma is an operator, but we
578 handle it with the builtin code for efficiency reasons. */
579 enum cpp_builtin_type
581 BT_SPECLINE = 0, /* `__LINE__' */
582 BT_DATE, /* `__DATE__' */
583 BT_FILE, /* `__FILE__' */
584 BT_BASE_FILE, /* `__BASE_FILE__' */
585 BT_INCLUDE_LEVEL, /* `__INCLUDE_LEVEL__' */
586 BT_TIME, /* `__TIME__' */
587 BT_STDC, /* `__STDC__' */
588 BT_PRAGMA, /* `_Pragma' operator */
589 BT_TIMESTAMP, /* `__TIMESTAMP__' */
590 BT_COUNTER /* `__COUNTER__' */
593 #define CPP_HASHNODE(HNODE) ((cpp_hashnode *) (HNODE))
594 #define HT_NODE(NODE) ((ht_identifier *) (NODE))
595 #define NODE_LEN(NODE) HT_LEN (&(NODE)->ident)
596 #define NODE_NAME(NODE) HT_STR (&(NODE)->ident)
598 /* Specify which field, if any, of the union is used. */
608 #define CPP_HASHNODE_VALUE_IDX(HNODE) \
609 ((HNODE.flags & NODE_MACRO_ARG) ? NTV_ARGUMENT \
610 : HNODE.type == NT_MACRO ? ((HNODE.flags & NODE_BUILTIN) \
611 ? NTV_BUILTIN : NTV_MACRO) \
612 : HNODE.type == NT_ASSERTION ? NTV_ANSWER \
615 /* The common part of an identifier node shared amongst all 3 C front
616 ends. Also used to store CPP identifiers, which are a superset of
617 identifiers in the grammatical sense. */
619 union GTY(()) _cpp_hashnode_value {
621 cpp_macro * GTY((tag ("NTV_MACRO"))) macro;
622 /* Answers to an assertion. */
623 struct answer * GTY ((tag ("NTV_ANSWER"))) answers;
624 /* Code for a builtin macro. */
625 enum cpp_builtin_type GTY ((tag ("NTV_BUILTIN"))) builtin;
626 /* Macro argument index. */
627 unsigned short GTY ((tag ("NTV_ARGUMENT"))) arg_index;
630 struct GTY(()) cpp_hashnode {
631 struct ht_identifier ident;
632 unsigned int is_directive : 1;
633 unsigned int directive_index : 7; /* If is_directive,
634 then index into directive table.
635 Otherwise, a NODE_OPERATOR. */
636 unsigned char rid_code; /* Rid code - for front ends. */
637 ENUM_BITFIELD(node_type) type : 6; /* CPP node type. */
638 unsigned int flags : 10; /* CPP flags. */
640 union _cpp_hashnode_value GTY ((desc ("CPP_HASHNODE_VALUE_IDX (%1)"))) value;
643 /* Call this first to get a handle to pass to other functions.
645 If you want cpplib to manage its own hashtable, pass in a NULL
646 pointer. Otherwise you should pass in an initialized hash table
647 that cpplib will share; this technique is used by the C front
649 extern cpp_reader *cpp_create_reader (enum c_lang, struct ht *,
652 /* Reset the cpp_reader's line_map. This is only used after reading a
654 extern void cpp_set_line_map (cpp_reader *, struct line_maps *);
656 /* Call this to change the selected language standard (e.g. because of
657 command line options). */
658 extern void cpp_set_lang (cpp_reader *, enum c_lang);
660 /* Set the include paths. */
661 extern void cpp_set_include_chains (cpp_reader *, cpp_dir *, cpp_dir *, int);
663 /* Call these to get pointers to the options, callback, and deps
664 structures for a given reader. These pointers are good until you
665 call cpp_finish on that reader. You can either edit the callbacks
666 through the pointer returned from cpp_get_callbacks, or set them
667 with cpp_set_callbacks. */
668 extern cpp_options *cpp_get_options (cpp_reader *);
669 extern cpp_callbacks *cpp_get_callbacks (cpp_reader *);
670 extern void cpp_set_callbacks (cpp_reader *, cpp_callbacks *);
671 extern struct deps *cpp_get_deps (cpp_reader *);
673 /* This function reads the file, but does not start preprocessing. It
674 returns the name of the original file; this is the same as the
675 input file, except for preprocessed input. This will generate at
676 least one file change callback, and possibly a line change callback
677 too. If there was an error opening the file, it returns NULL. */
678 extern const char *cpp_read_main_file (cpp_reader *, const char *);
680 /* Set up built-ins with special behavior. Use cpp_init_builtins()
681 instead unless your know what you are doing. */
682 extern void cpp_init_special_builtins (cpp_reader *);
684 /* Set up built-ins like __FILE__. */
685 extern void cpp_init_builtins (cpp_reader *, int);
687 /* This is called after options have been parsed, and partially
689 extern void cpp_post_options (cpp_reader *);
691 /* Set up translation to the target character set. */
692 extern void cpp_init_iconv (cpp_reader *);
694 /* Call this to finish preprocessing. If you requested dependency
695 generation, pass an open stream to write the information to,
696 otherwise NULL. It is your responsibility to close the stream. */
697 extern void cpp_finish (cpp_reader *, FILE *deps_stream);
699 /* Call this to release the handle at the end of preprocessing. Any
700 use of the handle after this function returns is invalid. */
701 extern void cpp_destroy (cpp_reader *);
703 extern unsigned int cpp_token_len (const cpp_token *);
704 extern unsigned char *cpp_token_as_text (cpp_reader *, const cpp_token *);
705 extern unsigned char *cpp_spell_token (cpp_reader *, const cpp_token *,
706 unsigned char *, bool);
707 extern void cpp_register_pragma (cpp_reader *, const char *, const char *,
708 void (*) (cpp_reader *), bool);
709 extern void cpp_register_deferred_pragma (cpp_reader *, const char *,
710 const char *, unsigned, bool, bool);
711 extern int cpp_avoid_paste (cpp_reader *, const cpp_token *,
713 extern const cpp_token *cpp_get_token (cpp_reader *);
714 extern const cpp_token *cpp_get_token_with_location (cpp_reader *,
716 extern const unsigned char *cpp_macro_definition (cpp_reader *,
717 const cpp_hashnode *);
718 extern void _cpp_backup_tokens (cpp_reader *, unsigned int);
719 extern const cpp_token *cpp_peek_token (cpp_reader *, int);
721 /* Evaluate a CPP_CHAR or CPP_WCHAR token. */
722 extern cppchar_t cpp_interpret_charconst (cpp_reader *, const cpp_token *,
723 unsigned int *, int *);
724 /* Evaluate a vector of CPP_STRING or CPP_WSTRING tokens. */
725 extern bool cpp_interpret_string (cpp_reader *,
726 const cpp_string *, size_t,
727 cpp_string *, enum cpp_ttype);
728 extern bool cpp_interpret_string_notranslate (cpp_reader *,
729 const cpp_string *, size_t,
730 cpp_string *, enum cpp_ttype);
732 /* Convert a host character constant to the execution character set. */
733 extern cppchar_t cpp_host_to_exec_charset (cpp_reader *, cppchar_t);
735 /* Used to register macros and assertions, perhaps from the command line.
736 The text is the same as the command line argument. */
737 extern void cpp_define (cpp_reader *, const char *);
738 extern void cpp_define_formatted (cpp_reader *pfile,
739 const char *fmt, ...) ATTRIBUTE_PRINTF_2;
740 extern void cpp_assert (cpp_reader *, const char *);
741 extern void cpp_undef (cpp_reader *, const char *);
742 extern void cpp_unassert (cpp_reader *, const char *);
744 extern cpp_macro *cpp_push_definition (cpp_reader *, const char *);
745 extern void cpp_pop_definition (cpp_reader *, const char *, cpp_macro *);
747 /* Undefine all macros and assertions. */
748 extern void cpp_undef_all (cpp_reader *);
750 extern cpp_buffer *cpp_push_buffer (cpp_reader *, const unsigned char *,
752 extern int cpp_defined (cpp_reader *, const unsigned char *, int);
754 /* A preprocessing number. Code assumes that any unused high bits of
755 the double integer are set to zero. */
756 typedef unsigned HOST_WIDE_INT cpp_num_part;
757 typedef struct cpp_num cpp_num;
762 bool unsignedp; /* True if value should be treated as unsigned. */
763 bool overflow; /* True if the most recent calculation overflowed. */
766 /* cpplib provides two interfaces for interpretation of preprocessing
769 cpp_classify_number categorizes numeric constants according to
770 their field (integer, floating point, or invalid), radix (decimal,
771 octal, hexadecimal), and type suffixes. */
773 #define CPP_N_CATEGORY 0x000F
774 #define CPP_N_INVALID 0x0000
775 #define CPP_N_INTEGER 0x0001
776 #define CPP_N_FLOATING 0x0002
778 #define CPP_N_WIDTH 0x00F0
779 #define CPP_N_SMALL 0x0010 /* int, float, shrot _Fract/Accum */
780 #define CPP_N_MEDIUM 0x0020 /* long, double, long _Fract/_Accum. */
781 #define CPP_N_LARGE 0x0040 /* long long, long double,
782 long long _Fract/Accum. */
784 #define CPP_N_WIDTH_MD 0xF0000 /* machine defined. */
785 #define CPP_N_MD_W 0x10000
786 #define CPP_N_MD_Q 0x20000
788 #define CPP_N_RADIX 0x0F00
789 #define CPP_N_DECIMAL 0x0100
790 #define CPP_N_HEX 0x0200
791 #define CPP_N_OCTAL 0x0400
792 #define CPP_N_BINARY 0x0800
794 #define CPP_N_UNSIGNED 0x1000 /* Properties. */
795 #define CPP_N_IMAGINARY 0x2000
796 #define CPP_N_DFLOAT 0x4000
797 #define CPP_N_DEFAULT 0x8000
799 #define CPP_N_FRACT 0x100000 /* Fract types. */
800 #define CPP_N_ACCUM 0x200000 /* Accum types. */
802 /* Classify a CPP_NUMBER token. The return value is a combination of
803 the flags from the above sets. */
804 extern unsigned cpp_classify_number (cpp_reader *, const cpp_token *);
806 /* Evaluate a token classified as category CPP_N_INTEGER. */
807 extern cpp_num cpp_interpret_integer (cpp_reader *, const cpp_token *,
810 /* Sign extend a number, with PRECISION significant bits and all
811 others assumed clear, to fill out a cpp_num structure. */
812 cpp_num cpp_num_sign_extend (cpp_num, size_t);
814 /* Diagnostic levels. To get a diagnostic without associating a
815 position in the translation unit with it, use cpp_error_with_line
816 with a line number of zero. */
818 /* Warning, an error with -Werror. */
819 #define CPP_DL_WARNING 0x00
820 /* Same as CPP_DL_WARNING, except it is not suppressed in system headers. */
821 #define CPP_DL_WARNING_SYSHDR 0x01
822 /* Warning, an error with -pedantic-errors or -Werror. */
823 #define CPP_DL_PEDWARN 0x02
825 #define CPP_DL_ERROR 0x03
826 /* An internal consistency check failed. Prints "internal error: ",
827 otherwise the same as CPP_DL_ERROR. */
828 #define CPP_DL_ICE 0x04
829 /* An informative note following a warning. */
830 #define CPP_DL_NOTE 0x05
832 #define CPP_DL_FATAL 0x06
834 /* Output a diagnostic of some kind. */
835 extern bool cpp_error (cpp_reader *, int, const char *msgid, ...)
838 /* Output a diagnostic with "MSGID: " preceding the
839 error string of errno. No location is printed. */
840 extern bool cpp_errno (cpp_reader *, int, const char *msgid);
842 /* Same as cpp_error, except additionally specifies a position as a
843 (translation unit) physical line and physical column. If the line is
844 zero, then no location is printed. */
845 extern bool cpp_error_with_line (cpp_reader *, int, source_location, unsigned,
846 const char *msgid, ...) ATTRIBUTE_PRINTF_5;
849 extern int cpp_ideq (const cpp_token *, const char *);
850 extern void cpp_output_line (cpp_reader *, FILE *);
851 extern unsigned char *cpp_output_line_to_string (cpp_reader *,
852 const unsigned char *);
853 extern void cpp_output_token (const cpp_token *, FILE *);
854 extern const char *cpp_type2name (enum cpp_ttype, unsigned char flags);
855 /* Returns the value of an escape sequence, truncated to the correct
856 target precision. PSTR points to the input pointer, which is just
857 after the backslash. LIMIT is how much text we have. WIDE is true
858 if the escape sequence is part of a wide character constant or
859 string literal. Handles all relevant diagnostics. */
860 extern cppchar_t cpp_parse_escape (cpp_reader *, const unsigned char ** pstr,
861 const unsigned char *limit, int wide);
863 /* Structure used to hold a comment block at a given location in the
868 /* Text of the comment including the terminators. */
871 /* source location for the given comment. */
872 source_location sloc;
875 /* Structure holding all comments for a given cpp_reader. */
879 /* table of comment entries. */
880 cpp_comment *entries;
882 /* number of actual entries entered in the table. */
885 /* number of entries allocated currently. */
889 /* Returns the table of comments encountered by the preprocessor. This
890 table is only populated when pfile->state.save_comments is true. */
891 extern cpp_comment_table *cpp_get_comments (cpp_reader *);
895 /* Lookup an identifier in the hashtable. Puts the identifier in the
896 table if it is not already there. */
897 extern cpp_hashnode *cpp_lookup (cpp_reader *, const unsigned char *,
900 typedef int (*cpp_cb) (cpp_reader *, cpp_hashnode *, void *);
901 extern void cpp_forall_identifiers (cpp_reader *, cpp_cb, void *);
904 extern void cpp_scan_nooutput (cpp_reader *);
905 extern int cpp_sys_macro_p (cpp_reader *);
906 extern unsigned char *cpp_quote_string (unsigned char *, const unsigned char *,
910 extern bool cpp_included (cpp_reader *, const char *);
911 extern bool cpp_included_before (cpp_reader *, const char *, source_location);
912 extern void cpp_make_system_header (cpp_reader *, int, int);
913 extern bool cpp_push_include (cpp_reader *, const char *);
914 extern void cpp_change_file (cpp_reader *, enum lc_reason, const char *);
915 extern const char *cpp_get_path (struct _cpp_file *);
916 extern cpp_dir *cpp_get_dir (struct _cpp_file *);
917 extern cpp_buffer *cpp_get_buffer (cpp_reader *);
918 extern struct _cpp_file *cpp_get_file (cpp_buffer *);
919 extern cpp_buffer *cpp_get_prev (cpp_buffer *);
920 extern void cpp_clear_file_cache (cpp_reader *);
923 struct save_macro_data;
924 extern int cpp_save_state (cpp_reader *, FILE *);
925 extern int cpp_write_pch_deps (cpp_reader *, FILE *);
926 extern int cpp_write_pch_state (cpp_reader *, FILE *);
927 extern int cpp_valid_state (cpp_reader *, const char *, int);
928 extern void cpp_prepare_state (cpp_reader *, struct save_macro_data **);
929 extern int cpp_read_state (cpp_reader *, const char *, FILE *,
930 struct save_macro_data *);
932 #endif /* ! LIBCPP_CPPLIB_H */