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