1 /* Definitions for CPP library.
2 Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
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 2, 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; if not, write to the Free Software
19 Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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(OTHER, LITERAL) /* stray punctuation */ \
128 TK(STRING, LITERAL) /* "string" */ \
129 TK(WSTRING, LITERAL) /* L"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 /* SDCC _asm specific */ \
141 TK(ASM, LITERAL) /* _asm ... _endasm ; */
143 #define OP(e, s) CPP_ ## e,
144 #define TK(e, s) CPP_ ## e,
150 /* Positions in the table. */
151 CPP_LAST_EQ = CPP_LSHIFT,
152 CPP_FIRST_DIGRAPH = CPP_HASH,
153 CPP_LAST_PUNCTUATOR= CPP_ATSIGN,
154 CPP_LAST_CPP_OP = CPP_LESS_EQ
159 /* C language kind, used when calling cpp_create_reader. */
160 enum c_lang {CLK_GNUC89 = 0, CLK_GNUC99, CLK_STDC89, CLK_STDC94, CLK_STDC99,
161 CLK_GNUCXX, CLK_CXX98, CLK_ASM};
163 /* Payload of a NUMBER, STRING, CHAR or COMMENT token. */
164 struct cpp_string GTY(())
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,
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_PRAGMA,
192 /* A preprocessing token. This has been carefully packed and should
193 occupy 16 bytes on 32-bit hosts and 24 bytes on 64-bit hosts. */
194 struct cpp_token GTY(())
196 source_location src_loc; /* Location of first char of token. */
197 ENUM_BITFIELD(cpp_ttype) type : CHAR_BIT; /* token type */
198 unsigned char flags; /* flags - see above */
204 GTY ((nested_ptr (union tree_node,
205 "%h ? CPP_HASHNODE (GCC_IDENT_TO_HT_IDENT (%h)) : NULL",
206 "%h ? HT_IDENT_TO_GCC_IDENT (HT_NODE (%h)) : NULL"),
207 tag ("CPP_TOKEN_FLD_NODE")))
210 /* Inherit padding from this token. */
211 cpp_token * GTY ((tag ("CPP_TOKEN_FLD_SOURCE"))) source;
213 /* A string, or number. */
214 struct cpp_string GTY ((tag ("CPP_TOKEN_FLD_STR"))) str;
216 /* Argument no. for a CPP_MACRO_ARG. */
217 unsigned int GTY ((tag ("CPP_TOKEN_FLD_ARG_NO"))) arg_no;
219 /* Caller-supplied identifier for a CPP_PRAGMA. */
220 unsigned int GTY ((tag ("CPP_TOKEN_FLD_PRAGMA"))) pragma;
221 } GTY ((desc ("cpp_token_val_index (&%1)"))) val;
224 /* Say which field is in use. */
225 extern enum cpp_token_fld_kind cpp_token_val_index (cpp_token *tok);
227 /* A type wide enough to hold any multibyte source character.
228 cpplib's character constant interpreter requires an unsigned type.
229 Also, a typedef for the signed equivalent.
230 The width of this type is capped at 32 bits; there do exist targets
231 where wchar_t is 64 bits, but only in a non-default mode, and there
232 would be no meaningful interpretation for a wchar_t value greater
233 than 2^32 anyway -- the widest wide-character encoding around is
234 ISO 10646, which stops at 2^31. */
235 #if CHAR_BIT * SIZEOF_INT >= 32
236 # define CPPCHAR_SIGNED_T int
237 #elif CHAR_BIT * SIZEOF_LONG >= 32
238 # define CPPCHAR_SIGNED_T long
240 # error "Cannot find a least-32-bit signed integer type"
242 typedef unsigned CPPCHAR_SIGNED_T cppchar_t;
243 typedef CPPCHAR_SIGNED_T cppchar_signed_t;
245 /* Style of header dependencies to generate. */
246 enum cpp_deps_style { DEPS_NONE = 0, DEPS_USER, DEPS_SYSTEM };
248 /* The possible normalization levels, from most restrictive to least. */
249 enum cpp_normalize_level {
254 /* In NFC, except for subsequences where being in NFC would make
255 the identifier invalid. */
256 normalized_identifier_C,
257 /* Not normalized at all. */
261 /* This structure is nested inside struct cpp_reader, and
262 carries all the options visible to the command line. */
265 /* Characters between tab stops. */
266 unsigned int tabstop;
268 /* The language we're preprocessing. */
271 /* Nonzero means use extra default include directories for C++. */
272 unsigned char cplusplus;
274 /* Nonzero means handle cplusplus style comments. */
275 unsigned char cplusplus_comments;
277 /* Nonzero means define __OBJC__, treat @ as a special token, and
278 use the OBJC[PLUS]_INCLUDE_PATH environment variable. */
281 /* Nonzero means don't copy comments into the output file. */
282 unsigned char discard_comments;
284 /* Nonzero means don't copy comments into the output file during
286 unsigned char discard_comments_in_macro_exp;
288 /* Nonzero means process the ISO trigraph sequences. */
289 unsigned char trigraphs;
291 /* Nonzero means process the ISO digraph sequences. */
292 unsigned char digraphs;
294 /* Nonzero means to allow hexadecimal floats and LL suffixes. */
295 unsigned char extended_numbers;
297 /* Nonzero means print names of header files (-H). */
298 unsigned char print_include_names;
300 /* Nonzero means cpp_pedwarn causes a hard error. */
301 unsigned char pedantic_errors;
303 /* Nonzero means don't print warning messages. */
304 unsigned char inhibit_warnings;
306 /* Nonzero means complain about deprecated features. */
307 unsigned char warn_deprecated;
309 /* Nonzero means don't suppress warnings from system headers. */
310 unsigned char warn_system_headers;
312 /* Nonzero means don't print error messages. Has no option to
313 select it, but can be set by a user of cpplib (e.g. fix-header). */
314 unsigned char inhibit_errors;
316 /* Nonzero means warn if slash-star appears in a comment. */
317 unsigned char warn_comments;
319 /* Nonzero means warn if a user-supplied include directory does not
321 unsigned char warn_missing_include_dirs;
323 /* Nonzero means warn if there are any trigraphs. */
324 unsigned char warn_trigraphs;
326 /* Nonzero means warn about multicharacter charconsts. */
327 unsigned char warn_multichar;
329 /* Nonzero means warn about various incompatibilities with
331 unsigned char warn_traditional;
333 /* Nonzero means warn about long long numeric constants. */
334 unsigned char warn_long_long;
336 /* Nonzero means warn about text after an #endif (or #else). */
337 unsigned char warn_endif_labels;
339 /* Nonzero means warn about implicit sign changes owing to integer
341 unsigned char warn_num_sign_change;
343 /* Zero means don't warn about __VA_ARGS__ usage in c89 pedantic mode.
344 Presumably the usage is protected by the appropriate #ifdef. */
345 unsigned char warn_variadic_macros;
347 /* Nonzero means turn warnings into errors. */
348 unsigned char warnings_are_errors;
350 /* Nonzero means we should look for header.gcc files that remap file
354 /* Zero means dollar signs are punctuation. */
355 unsigned char dollars_in_ident;
357 /* Nonzero means UCNs are accepted in identifiers. */
358 unsigned char extended_identifiers;
360 /* True if we should warn about dollars in identifiers or numbers
361 for this translation unit. */
362 unsigned char warn_dollars;
364 /* Nonzero means warn if undefined identifiers are evaluated in an #if. */
365 unsigned char warn_undef;
367 /* Nonzero means warn of unused macros from the main file. */
368 unsigned char warn_unused_macros;
370 /* Nonzero for the 1999 C Standard, including corrigenda and amendments. */
373 /* Nonzero if we are conforming to a specific C or C++ standard. */
376 /* Nonzero means give all the error messages the ANSI standard requires. */
377 unsigned char pedantic;
379 /* Nonzero means we're looking at already preprocessed code, so don't
380 bother trying to do macro expansion and whatnot. */
381 unsigned char preprocessed;
383 /* Print column number in error messages. */
384 unsigned char show_column;
386 /* Nonzero means handle C++ alternate operator names. */
387 unsigned char operator_names;
389 /* True for traditional preprocessing. */
390 unsigned char traditional;
392 /* Holds the name of the target (execution) character set. */
393 const char *narrow_charset;
395 /* Holds the name of the target wide character set. */
396 const char *wide_charset;
398 /* Holds the name of the input character set. */
399 const char *input_charset;
401 /* The minimum permitted level of normalization before a warning
403 enum cpp_normalize_level warn_normalize;
405 /* True to warn about precompiled header files we couldn't use. */
406 bool warn_invalid_pch;
408 /* True if dependencies should be restored from a precompiled header. */
409 bool restore_pch_deps;
411 /* SDCC abuse by Kevin: allow naked '#' characters in expanded macros
412 * (see _cpp_create_definition in cppmacro.c)
414 unsigned char allow_naked_hash;
416 /* SDCC _asm specific
417 switch _asm block preprocessing on / off */
418 unsigned char preproc_asm;
421 object file exetnsion */
425 pedantic_parse_number */
426 unsigned char pedantic_parse_number;
428 /* Dependency generation. */
431 /* Style of header dependencies to generate. */
432 enum cpp_deps_style style;
434 /* Assume missing files are generated files. */
437 /* Generate phony targets for each dependency apart from the first
441 /* If true, no dependency is generated on the main file. */
442 bool ignore_main_file;
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 means error callback should be used for diagnostics. */
462 bool client_diagnostic;
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 *, unsigned int, const unsigned char *,
487 const char *, int, const cpp_token **);
488 void (*define) (cpp_reader *, unsigned int, cpp_hashnode *);
489 void (*undef) (cpp_reader *, unsigned int, cpp_hashnode *);
490 void (*ident) (cpp_reader *, unsigned int, const cpp_string *);
491 void (*def_pragma) (cpp_reader *, unsigned int);
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 /* Called to emit a diagnostic if client_diagnostic option is true.
497 This callback receives the translated message. */
498 void (*error) (cpp_reader *, int, const char *, va_list *)
499 ATTRIBUTE_FPTR_PRINTF(3,0);
502 /* Chain of directories to look for include files in. */
505 /* NULL-terminated singly-linked list. */
506 struct cpp_dir *next;
508 /* NAME of the directory, NUL-terminated. */
512 /* One if a system header, two if a system header that has extern
513 "C" guards for C++. */
516 /* Mapping of file names for this directory for MS-DOS and related
517 platforms. A NULL-terminated array of (from, to) pairs. */
518 const char **name_map;
520 /* Routine to construct pathname, given the search path name and the
521 HEADER we are trying to find, return a constructed pathname to
522 try and open. If this is NULL, the constructed pathname is as
523 constructed by append_file_to_dir. */
524 char *(*construct) (const char *header, cpp_dir *dir);
526 /* The C front end uses these to recognize duplicated
527 directories in the search path. */
531 /* Is this a user-supplied directory? */
532 bool user_supplied_p;
535 /* Name under which this program was invoked. */
536 extern const char *progname;
538 /* The structure of a node in the hash table. The hash table has
539 entries for all identifiers: either macros defined by #define
540 commands (type NT_MACRO), assertions created with #assert
541 (NT_ASSERTION), or neither of the above (NT_VOID). Builtin macros
542 like __LINE__ are flagged NODE_BUILTIN. Poisoned identifiers are
543 flagged NODE_POISONED. NODE_OPERATOR (C++ only) indicates an
544 identifier that behaves like an operator such as "xor".
545 NODE_DIAGNOSTIC is for speed in lex_token: it indicates a
546 diagnostic may be required for this node. Currently this only
547 applies to __VA_ARGS__ and poisoned identifiers. */
549 /* Hash node flags. */
550 #define NODE_OPERATOR (1 << 0) /* C++ named operator. */
551 #define NODE_POISONED (1 << 1) /* Poisoned identifier. */
552 #define NODE_BUILTIN (1 << 2) /* Builtin macro. */
553 #define NODE_DIAGNOSTIC (1 << 3) /* Possible diagnostic when lexed. */
554 #define NODE_WARN (1 << 4) /* Warn if redefined or undefined. */
555 #define NODE_DISABLED (1 << 5) /* A disabled macro. */
556 #define NODE_MACRO_ARG (1 << 6) /* Used during #define processing. */
558 /* Different flavors of hash node. */
561 NT_VOID = 0, /* No definition yet. */
562 NT_MACRO, /* A macro of some form. */
563 NT_ASSERTION /* Predicate for #assert. */
566 /* Different flavors of builtin macro. _Pragma is an operator, but we
567 handle it with the builtin code for efficiency reasons. */
570 BT_SPECLINE = 0, /* `__LINE__' */
571 BT_DATE, /* `__DATE__' */
572 BT_FILE, /* `__FILE__' */
573 BT_BASE_FILE, /* `__BASE_FILE__' */
574 BT_INCLUDE_LEVEL, /* `__INCLUDE_LEVEL__' */
575 BT_TIME, /* `__TIME__' */
576 BT_STDC, /* `__STDC__' */
577 BT_PRAGMA, /* `_Pragma' operator */
578 BT_TIMESTAMP /* `__TIMESTAMP__' */
581 #define CPP_HASHNODE(HNODE) ((cpp_hashnode *) (HNODE))
582 #define HT_NODE(NODE) ((ht_identifier *) (NODE))
583 #define NODE_LEN(NODE) HT_LEN (&(NODE)->ident)
584 #define NODE_NAME(NODE) HT_STR (&(NODE)->ident)
586 /* Specify which field, if any, of the union is used. */
596 #define CPP_HASHNODE_VALUE_IDX(HNODE) \
597 ((HNODE.flags & NODE_MACRO_ARG) ? NTV_ARGUMENT \
598 : HNODE.type == NT_MACRO ? ((HNODE.flags & NODE_BUILTIN) \
599 ? NTV_BUILTIN : NTV_MACRO) \
600 : HNODE.type == NT_ASSERTION ? NTV_ANSWER \
603 /* The common part of an identifier node shared amongst all 3 C front
604 ends. Also used to store CPP identifiers, which are a superset of
605 identifiers in the grammatical sense. */
607 union _cpp_hashnode_value GTY(())
610 cpp_macro * GTY((tag ("NTV_MACRO"))) macro;
611 /* Answers to an assertion. */
612 struct answer * GTY ((tag ("NTV_ANSWER"))) answers;
613 /* Code for a builtin macro. */
614 enum builtin_type GTY ((tag ("NTV_BUILTIN"))) builtin;
615 /* Macro argument index. */
616 unsigned short GTY ((tag ("NTV_ARGUMENT"))) arg_index;
619 struct cpp_hashnode GTY(())
621 struct ht_identifier ident;
622 unsigned int is_directive : 1;
623 unsigned int directive_index : 7; /* If is_directive,
624 then index into directive table.
625 Otherwise, a NODE_OPERATOR. */
626 unsigned char rid_code; /* Rid code - for front ends. */
627 ENUM_BITFIELD(node_type) type : 8; /* CPP node type. */
628 unsigned char flags; /* CPP flags. */
630 union _cpp_hashnode_value GTY ((desc ("CPP_HASHNODE_VALUE_IDX (%1)"))) value;
633 /* Call this first to get a handle to pass to other functions.
635 If you want cpplib to manage its own hashtable, pass in a NULL
636 pointer. Otherwise you should pass in an initialized hash table
637 that cpplib will share; this technique is used by the C front
639 extern cpp_reader *cpp_create_reader (enum c_lang, struct ht *,
642 /* Call this to change the selected language standard (e.g. because of
643 command line options). */
644 extern void cpp_set_lang (cpp_reader *, enum c_lang);
646 /* Set the include paths. */
647 extern void cpp_set_include_chains (cpp_reader *, cpp_dir *, cpp_dir *, int);
649 /* Call these to get pointers to the options, callback, and deps
650 structures for a given reader. These pointers are good until you
651 call cpp_finish on that reader. You can either edit the callbacks
652 through the pointer returned from cpp_get_callbacks, or set them
653 with cpp_set_callbacks. */
654 extern cpp_options *cpp_get_options (cpp_reader *);
655 extern cpp_callbacks *cpp_get_callbacks (cpp_reader *);
656 extern void cpp_set_callbacks (cpp_reader *, cpp_callbacks *);
657 extern struct deps *cpp_get_deps (cpp_reader *);
659 /* This function reads the file, but does not start preprocessing. It
660 returns the name of the original file; this is the same as the
661 input file, except for preprocessed input. This will generate at
662 least one file change callback, and possibly a line change callback
663 too. If there was an error opening the file, it returns NULL. */
664 extern const char *cpp_read_main_file (cpp_reader *, const char *);
666 /* Set up built-ins like __FILE__. */
667 extern void cpp_init_builtins (cpp_reader *, int);
669 /* This is called after options have been parsed, and partially
671 extern void cpp_post_options (cpp_reader *);
673 /* Set up translation to the target character set. */
674 extern void cpp_init_iconv (cpp_reader *);
676 /* Call this to finish preprocessing. If you requested dependency
677 generation, pass an open stream to write the information to,
678 otherwise NULL. It is your responsibility to close the stream.
680 Returns cpp_errors (pfile). */
681 extern int cpp_finish (cpp_reader *, FILE *deps_stream);
683 /* Call this to release the handle at the end of preprocessing. Any
684 use of the handle after this function returns is invalid. Returns
685 cpp_errors (pfile). */
686 extern void cpp_destroy (cpp_reader *);
689 extern unsigned int cpp_errors (cpp_reader *);
691 extern unsigned int cpp_token_len (const cpp_token *);
692 extern unsigned char *cpp_token_as_text (cpp_reader *, const cpp_token *);
693 extern unsigned char *cpp_spell_token (cpp_reader *, const cpp_token *,
694 unsigned char *, bool);
695 extern void cpp_register_pragma (cpp_reader *, const char *, const char *,
696 void (*) (cpp_reader *), bool);
697 extern void cpp_register_deferred_pragma (cpp_reader *, const char *,
698 const char *, unsigned, bool, bool);
699 extern int cpp_avoid_paste (cpp_reader *, const cpp_token *,
701 extern const cpp_token *cpp_get_token (cpp_reader *);
702 extern const unsigned char *cpp_macro_definition (cpp_reader *,
703 const cpp_hashnode *);
704 extern void _cpp_backup_tokens (cpp_reader *, unsigned int);
706 /* Evaluate a CPP_CHAR or CPP_WCHAR token. */
707 extern cppchar_t cpp_interpret_charconst (cpp_reader *, const cpp_token *,
708 unsigned int *, int *);
709 /* Evaluate a vector of CPP_STRING or CPP_WSTRING tokens. */
710 extern bool cpp_interpret_string (cpp_reader *,
711 const cpp_string *, size_t,
713 extern bool cpp_interpret_string_notranslate (cpp_reader *,
714 const cpp_string *, size_t,
717 /* Convert a host character constant to the execution character set. */
718 extern cppchar_t cpp_host_to_exec_charset (cpp_reader *, cppchar_t);
720 /* Used to register macros and assertions, perhaps from the command line.
721 The text is the same as the command line argument. */
722 extern void cpp_define (cpp_reader *, const char *);
723 extern void cpp_assert (cpp_reader *, const char *);
724 extern void cpp_undef (cpp_reader *, const char *);
725 extern void cpp_unassert (cpp_reader *, const char *);
727 /* Undefine all macros and assertions. */
728 extern void cpp_undef_all (cpp_reader *);
730 extern cpp_buffer *cpp_push_buffer (cpp_reader *, const unsigned char *,
732 extern int cpp_defined (cpp_reader *, const unsigned char *, int);
734 /* A preprocessing number. Code assumes that any unused high bits of
735 the double integer are set to zero. */
736 typedef unsigned HOST_WIDE_INT cpp_num_part;
737 typedef struct cpp_num cpp_num;
742 bool unsignedp; /* True if value should be treated as unsigned. */
743 bool overflow; /* True if the most recent calculation overflowed. */
746 /* cpplib provides two interfaces for interpretation of preprocessing
749 cpp_classify_number categorizes numeric constants according to
750 their field (integer, floating point, or invalid), radix (decimal,
751 octal, hexadecimal), and type suffixes. */
753 #define CPP_N_CATEGORY 0x000F
754 #define CPP_N_INVALID 0x0000
755 #define CPP_N_INTEGER 0x0001
756 #define CPP_N_FLOATING 0x0002
758 #define CPP_N_WIDTH 0x00F0
759 #define CPP_N_SMALL 0x0010 /* int, float. */
760 #define CPP_N_MEDIUM 0x0020 /* long, double. */
761 #define CPP_N_LARGE 0x0040 /* long long, long double. */
763 #define CPP_N_RADIX 0x0F00
764 #define CPP_N_DECIMAL 0x0100
765 #define CPP_N_HEX 0x0200
766 #define CPP_N_OCTAL 0x0400
768 #define CPP_N_UNSIGNED 0x1000 /* Properties. */
769 #define CPP_N_IMAGINARY 0x2000
770 #define CPP_N_DFLOAT 0x4000
772 /* Classify a CPP_NUMBER token. The return value is a combination of
773 the flags from the above sets. */
774 extern unsigned cpp_classify_number (cpp_reader *, const cpp_token *);
776 /* Evaluate a token classified as category CPP_N_INTEGER. */
777 extern cpp_num cpp_interpret_integer (cpp_reader *, const cpp_token *,
780 /* Sign extend a number, with PRECISION significant bits and all
781 others assumed clear, to fill out a cpp_num structure. */
782 cpp_num cpp_num_sign_extend (cpp_num, size_t);
784 /* Diagnostic levels. To get a diagnostic without associating a
785 position in the translation unit with it, use cpp_error_with_line
786 with a line number of zero. */
788 /* Warning, an error with -Werror. */
789 #define CPP_DL_WARNING 0x00
790 /* Same as CPP_DL_WARNING, except it is not suppressed in system headers. */
791 #define CPP_DL_WARNING_SYSHDR 0x01
792 /* Warning, an error with -pedantic-errors or -Werror. */
793 #define CPP_DL_PEDWARN 0x02
795 #define CPP_DL_ERROR 0x03
796 /* An internal consistency check failed. Prints "internal error: ",
797 otherwise the same as CPP_DL_ERROR. */
798 #define CPP_DL_ICE 0x04
799 /* Extracts a diagnostic level from an int. */
800 #define CPP_DL_EXTRACT(l) (l & 0xf)
801 /* Nonzero if a diagnostic level is one of the warnings. */
802 #define CPP_DL_WARNING_P(l) (CPP_DL_EXTRACT (l) >= CPP_DL_WARNING \
803 && CPP_DL_EXTRACT (l) <= CPP_DL_PEDWARN)
805 /* Output a diagnostic of some kind. */
806 extern void cpp_error (cpp_reader *, int, const char *msgid, ...)
809 /* Output a diagnostic with "MSGID: " preceding the
810 error string of errno. No location is printed. */
811 extern void cpp_errno (cpp_reader *, int, const char *msgid);
813 /* Same as cpp_error, except additionally specifies a position as a
814 (translation unit) physical line and physical column. If the line is
815 zero, then no location is printed. */
816 extern void cpp_error_with_line (cpp_reader *, int, source_location, unsigned,
817 const char *msgid, ...) ATTRIBUTE_PRINTF_5;
820 extern int cpp_ideq (const cpp_token *, const char *);
821 extern void cpp_output_line (cpp_reader *, FILE *);
822 extern void cpp_output_token (const cpp_token *, FILE *);
823 extern const char *cpp_type2name (enum cpp_ttype);
824 /* Returns the value of an escape sequence, truncated to the correct
825 target precision. PSTR points to the input pointer, which is just
826 after the backslash. LIMIT is how much text we have. WIDE is true
827 if the escape sequence is part of a wide character constant or
828 string literal. Handles all relevant diagnostics. */
829 extern cppchar_t cpp_parse_escape (cpp_reader *, const unsigned char ** pstr,
830 const unsigned char *limit, int wide);
834 /* Lookup an identifier in the hashtable. Puts the identifier in the
835 table if it is not already there. */
836 extern cpp_hashnode *cpp_lookup (cpp_reader *, const unsigned char *,
839 typedef int (*cpp_cb) (cpp_reader *, cpp_hashnode *, void *);
840 extern void cpp_forall_identifiers (cpp_reader *, cpp_cb, void *);
843 extern void cpp_scan_nooutput (cpp_reader *);
844 extern int cpp_sys_macro_p (cpp_reader *);
845 extern unsigned char *cpp_quote_string (unsigned char *, const unsigned char *,
849 extern bool cpp_included (cpp_reader *, const char *);
850 extern void cpp_make_system_header (cpp_reader *, int, int);
851 extern bool cpp_push_include (cpp_reader *, const char *);
852 extern void cpp_change_file (cpp_reader *, enum lc_reason, const char *);
853 extern const char *cpp_get_path (struct _cpp_file *);
854 extern cpp_dir *cpp_get_dir (struct _cpp_file *);
855 extern cpp_buffer *cpp_get_buffer (cpp_reader *);
856 extern struct _cpp_file *cpp_get_file (cpp_buffer *);
857 extern cpp_buffer *cpp_get_prev (cpp_buffer *);
860 struct save_macro_data;
861 extern int cpp_save_state (cpp_reader *, FILE *);
862 extern int cpp_write_pch_deps (cpp_reader *, FILE *);
863 extern int cpp_write_pch_state (cpp_reader *, FILE *);
864 extern int cpp_valid_state (cpp_reader *, const char *, int);
865 extern void cpp_prepare_state (cpp_reader *, struct save_macro_data **);
866 extern int cpp_read_state (cpp_reader *, const char *, FILE *,
867 struct save_macro_data *);
873 #endif /* ! LIBCPP_CPPLIB_H */
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