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_GNUCXX0X, CLK_CXX0X, 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;
464 /* True disables tokenization outside of preprocessing directives. */
465 bool directives_only;
468 /* Callback for header lookup for HEADER, which is the name of a
469 source file. It is used as a method of last resort to find headers
470 that are not otherwise found during the normal include processing.
471 The return value is the malloced name of a header to try and open,
472 if any, or NULL otherwise. This callback is called only if the
473 header is otherwise unfound. */
474 typedef const char *(*missing_header_cb)(cpp_reader *, const char *header, cpp_dir **);
476 /* Call backs to cpplib client. */
479 /* Called when a new line of preprocessed output is started. */
480 void (*line_change) (cpp_reader *, const cpp_token *, int);
482 /* Called when switching to/from a new file.
483 The line_map is for the new file. It is NULL if there is no new file.
484 (In C this happens when done with <built-in>+<command line> and also
485 when done with a main file.) This can be used for resource cleanup. */
486 void (*file_change) (cpp_reader *, const struct line_map *);
488 void (*dir_change) (cpp_reader *, const char *);
489 void (*include) (cpp_reader *, unsigned int, const unsigned char *,
490 const char *, int, const cpp_token **);
491 void (*define) (cpp_reader *, unsigned int, cpp_hashnode *);
492 void (*undef) (cpp_reader *, unsigned int, cpp_hashnode *);
493 void (*ident) (cpp_reader *, unsigned int, const cpp_string *);
494 void (*def_pragma) (cpp_reader *, unsigned int);
495 int (*valid_pch) (cpp_reader *, const char *, int);
496 void (*read_pch) (cpp_reader *, const char *, int, const char *);
497 missing_header_cb missing_header;
499 /* Called to emit a diagnostic if client_diagnostic option is true.
500 This callback receives the translated message. */
501 void (*error) (cpp_reader *, int, const char *, va_list *)
502 ATTRIBUTE_FPTR_PRINTF(3,0);
505 /* Chain of directories to look for include files in. */
508 /* NULL-terminated singly-linked list. */
509 struct cpp_dir *next;
511 /* NAME of the directory, NUL-terminated. */
515 /* One if a system header, two if a system header that has extern
516 "C" guards for C++. */
519 /* Mapping of file names for this directory for MS-DOS and related
520 platforms. A NULL-terminated array of (from, to) pairs. */
521 const char **name_map;
523 /* Routine to construct pathname, given the search path name and the
524 HEADER we are trying to find, return a constructed pathname to
525 try and open. If this is NULL, the constructed pathname is as
526 constructed by append_file_to_dir. */
527 char *(*construct) (const char *header, cpp_dir *dir);
529 /* The C front end uses these to recognize duplicated
530 directories in the search path. */
534 /* Is this a user-supplied directory? */
535 bool user_supplied_p;
538 /* Name under which this program was invoked. */
539 extern const char *progname;
541 /* The structure of a node in the hash table. The hash table has
542 entries for all identifiers: either macros defined by #define
543 commands (type NT_MACRO), assertions created with #assert
544 (NT_ASSERTION), or neither of the above (NT_VOID). Builtin macros
545 like __LINE__ are flagged NODE_BUILTIN. Poisoned identifiers are
546 flagged NODE_POISONED. NODE_OPERATOR (C++ only) indicates an
547 identifier that behaves like an operator such as "xor".
548 NODE_DIAGNOSTIC is for speed in lex_token: it indicates a
549 diagnostic may be required for this node. Currently this only
550 applies to __VA_ARGS__ and poisoned identifiers. */
552 /* Hash node flags. */
553 #define NODE_OPERATOR (1 << 0) /* C++ named operator. */
554 #define NODE_POISONED (1 << 1) /* Poisoned identifier. */
555 #define NODE_BUILTIN (1 << 2) /* Builtin macro. */
556 #define NODE_DIAGNOSTIC (1 << 3) /* Possible diagnostic when lexed. */
557 #define NODE_WARN (1 << 4) /* Warn if redefined or undefined. */
558 #define NODE_DISABLED (1 << 5) /* A disabled macro. */
559 #define NODE_MACRO_ARG (1 << 6) /* Used during #define processing. */
561 /* Different flavors of hash node. */
564 NT_VOID = 0, /* No definition yet. */
565 NT_MACRO, /* A macro of some form. */
566 NT_ASSERTION /* Predicate for #assert. */
569 /* Different flavors of builtin macro. _Pragma is an operator, but we
570 handle it with the builtin code for efficiency reasons. */
573 BT_SPECLINE = 0, /* `__LINE__' */
574 BT_DATE, /* `__DATE__' */
575 BT_FILE, /* `__FILE__' */
576 BT_BASE_FILE, /* `__BASE_FILE__' */
577 BT_INCLUDE_LEVEL, /* `__INCLUDE_LEVEL__' */
578 BT_TIME, /* `__TIME__' */
579 BT_STDC, /* `__STDC__' */
580 BT_PRAGMA, /* `_Pragma' operator */
581 BT_TIMESTAMP, /* `__TIMESTAMP__' */
582 BT_COUNTER /* `__COUNTER__' */
585 #define CPP_HASHNODE(HNODE) ((cpp_hashnode *) (HNODE))
586 #define HT_NODE(NODE) ((ht_identifier *) (NODE))
587 #define NODE_LEN(NODE) HT_LEN (&(NODE)->ident)
588 #define NODE_NAME(NODE) HT_STR (&(NODE)->ident)
590 /* Specify which field, if any, of the union is used. */
600 #define CPP_HASHNODE_VALUE_IDX(HNODE) \
601 ((HNODE.flags & NODE_MACRO_ARG) ? NTV_ARGUMENT \
602 : HNODE.type == NT_MACRO ? ((HNODE.flags & NODE_BUILTIN) \
603 ? NTV_BUILTIN : NTV_MACRO) \
604 : HNODE.type == NT_ASSERTION ? NTV_ANSWER \
607 /* The common part of an identifier node shared amongst all 3 C front
608 ends. Also used to store CPP identifiers, which are a superset of
609 identifiers in the grammatical sense. */
611 union _cpp_hashnode_value GTY(())
614 cpp_macro * GTY((tag ("NTV_MACRO"))) macro;
615 /* Answers to an assertion. */
616 struct answer * GTY ((tag ("NTV_ANSWER"))) answers;
617 /* Code for a builtin macro. */
618 enum builtin_type GTY ((tag ("NTV_BUILTIN"))) builtin;
619 /* Macro argument index. */
620 unsigned short GTY ((tag ("NTV_ARGUMENT"))) arg_index;
623 struct cpp_hashnode GTY(())
625 struct ht_identifier ident;
626 unsigned int is_directive : 1;
627 unsigned int directive_index : 7; /* If is_directive,
628 then index into directive table.
629 Otherwise, a NODE_OPERATOR. */
630 unsigned char rid_code; /* Rid code - for front ends. */
631 ENUM_BITFIELD(node_type) type : 8; /* CPP node type. */
632 unsigned char flags; /* CPP flags. */
634 union _cpp_hashnode_value GTY ((desc ("CPP_HASHNODE_VALUE_IDX (%1)"))) value;
637 /* Call this first to get a handle to pass to other functions.
639 If you want cpplib to manage its own hashtable, pass in a NULL
640 pointer. Otherwise you should pass in an initialized hash table
641 that cpplib will share; this technique is used by the C front
643 extern cpp_reader *cpp_create_reader (enum c_lang, struct ht *,
646 /* Reset the cpp_reader's line_map. This is only used after reading a
648 extern void cpp_set_line_map (cpp_reader *, struct line_maps *);
650 /* Call this to change the selected language standard (e.g. because of
651 command line options). */
652 extern void cpp_set_lang (cpp_reader *, enum c_lang);
654 /* Set the include paths. */
655 extern void cpp_set_include_chains (cpp_reader *, cpp_dir *, cpp_dir *, int);
657 /* Call these to get pointers to the options, callback, and deps
658 structures for a given reader. These pointers are good until you
659 call cpp_finish on that reader. You can either edit the callbacks
660 through the pointer returned from cpp_get_callbacks, or set them
661 with cpp_set_callbacks. */
662 extern cpp_options *cpp_get_options (cpp_reader *);
663 extern cpp_callbacks *cpp_get_callbacks (cpp_reader *);
664 extern void cpp_set_callbacks (cpp_reader *, cpp_callbacks *);
665 extern struct deps *cpp_get_deps (cpp_reader *);
667 /* This function reads the file, but does not start preprocessing. It
668 returns the name of the original file; this is the same as the
669 input file, except for preprocessed input. This will generate at
670 least one file change callback, and possibly a line change callback
671 too. If there was an error opening the file, it returns NULL. */
672 extern const char *cpp_read_main_file (cpp_reader *, const char *);
674 /* Set up built-ins with special behavior. Use cpp_init_builtins()
675 instead unless your know what you are doing. */
676 extern void cpp_init_special_builtins (cpp_reader *);
678 /* Set up built-ins like __FILE__. */
679 extern void cpp_init_builtins (cpp_reader *, int);
681 /* This is called after options have been parsed, and partially
683 extern void cpp_post_options (cpp_reader *);
685 /* Set up translation to the target character set. */
686 extern void cpp_init_iconv (cpp_reader *);
688 /* Call this to finish preprocessing. If you requested dependency
689 generation, pass an open stream to write the information to,
690 otherwise NULL. It is your responsibility to close the stream.
692 Returns cpp_errors (pfile). */
693 extern int cpp_finish (cpp_reader *, FILE *deps_stream);
695 /* Call this to release the handle at the end of preprocessing. Any
696 use of the handle after this function returns is invalid. Returns
697 cpp_errors (pfile). */
698 extern void cpp_destroy (cpp_reader *);
701 extern unsigned int cpp_errors (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);
720 /* Evaluate a CPP_CHAR or CPP_WCHAR token. */
721 extern cppchar_t cpp_interpret_charconst (cpp_reader *, const cpp_token *,
722 unsigned int *, int *);
723 /* Evaluate a vector of CPP_STRING or CPP_WSTRING tokens. */
724 extern bool cpp_interpret_string (cpp_reader *,
725 const cpp_string *, size_t,
727 extern bool cpp_interpret_string_notranslate (cpp_reader *,
728 const cpp_string *, size_t,
731 /* Convert a host character constant to the execution character set. */
732 extern cppchar_t cpp_host_to_exec_charset (cpp_reader *, cppchar_t);
734 /* Used to register macros and assertions, perhaps from the command line.
735 The text is the same as the command line argument. */
736 extern void cpp_define (cpp_reader *, const char *);
737 extern void cpp_assert (cpp_reader *, const char *);
738 extern void cpp_undef (cpp_reader *, const char *);
739 extern void cpp_unassert (cpp_reader *, const char *);
741 extern cpp_macro *cpp_push_definition (cpp_reader *, const char *);
742 extern void cpp_pop_definition (cpp_reader *, const char *, cpp_macro *);
744 /* Undefine all macros and assertions. */
745 extern void cpp_undef_all (cpp_reader *);
747 extern cpp_buffer *cpp_push_buffer (cpp_reader *, const unsigned char *,
749 extern int cpp_defined (cpp_reader *, const unsigned char *, int);
751 /* A preprocessing number. Code assumes that any unused high bits of
752 the double integer are set to zero. */
753 typedef unsigned HOST_WIDE_INT cpp_num_part;
754 typedef struct cpp_num cpp_num;
759 bool unsignedp; /* True if value should be treated as unsigned. */
760 bool overflow; /* True if the most recent calculation overflowed. */
763 /* cpplib provides two interfaces for interpretation of preprocessing
766 cpp_classify_number categorizes numeric constants according to
767 their field (integer, floating point, or invalid), radix (decimal,
768 octal, hexadecimal), and type suffixes. */
770 #define CPP_N_CATEGORY 0x000F
771 #define CPP_N_INVALID 0x0000
772 #define CPP_N_INTEGER 0x0001
773 #define CPP_N_FLOATING 0x0002
775 #define CPP_N_WIDTH 0x00F0
776 #define CPP_N_SMALL 0x0010 /* int, float, shrot _Fract/Accum */
777 #define CPP_N_MEDIUM 0x0020 /* long, double, long _Fract/_Accum. */
778 #define CPP_N_LARGE 0x0040 /* long long, long double,
779 long long _Fract/Accum. */
781 #define CPP_N_WIDTH_MD 0xF0000 /* machine defined. */
782 #define CPP_N_MD_W 0x10000
783 #define CPP_N_MD_Q 0x20000
785 #define CPP_N_RADIX 0x0F00
786 #define CPP_N_DECIMAL 0x0100
787 #define CPP_N_HEX 0x0200
788 #define CPP_N_OCTAL 0x0400
789 #define CPP_N_BINARY 0x0800
791 #define CPP_N_UNSIGNED 0x1000 /* Properties. */
792 #define CPP_N_IMAGINARY 0x2000
793 #define CPP_N_DFLOAT 0x4000
795 #define CPP_N_FRACT 0x100000 /* Fract types. */
796 #define CPP_N_ACCUM 0x200000 /* Accum types. */
798 /* Classify a CPP_NUMBER token. The return value is a combination of
799 the flags from the above sets. */
800 extern unsigned cpp_classify_number (cpp_reader *, const cpp_token *);
802 /* Evaluate a token classified as category CPP_N_INTEGER. */
803 extern cpp_num cpp_interpret_integer (cpp_reader *, const cpp_token *,
806 /* Sign extend a number, with PRECISION significant bits and all
807 others assumed clear, to fill out a cpp_num structure. */
808 cpp_num cpp_num_sign_extend (cpp_num, size_t);
810 /* Diagnostic levels. To get a diagnostic without associating a
811 position in the translation unit with it, use cpp_error_with_line
812 with a line number of zero. */
814 /* Warning, an error with -Werror. */
815 #define CPP_DL_WARNING 0x00
816 /* Same as CPP_DL_WARNING, except it is not suppressed in system headers. */
817 #define CPP_DL_WARNING_SYSHDR 0x01
818 /* Warning, an error with -pedantic-errors or -Werror. */
819 #define CPP_DL_PEDWARN 0x02
821 #define CPP_DL_ERROR 0x03
822 /* An internal consistency check failed. Prints "internal error: ",
823 otherwise the same as CPP_DL_ERROR. */
824 #define CPP_DL_ICE 0x04
825 /* Extracts a diagnostic level from an int. */
826 #define CPP_DL_EXTRACT(l) (l & 0xf)
827 /* Nonzero if a diagnostic level is one of the warnings. */
828 #define CPP_DL_WARNING_P(l) (CPP_DL_EXTRACT (l) >= CPP_DL_WARNING \
829 && CPP_DL_EXTRACT (l) <= CPP_DL_PEDWARN)
831 /* Output a diagnostic of some kind. */
832 extern void cpp_error (cpp_reader *, int, const char *msgid, ...)
835 /* Output a diagnostic with "MSGID: " preceding the
836 error string of errno. No location is printed. */
837 extern void cpp_errno (cpp_reader *, int, const char *msgid);
839 /* Same as cpp_error, except additionally specifies a position as a
840 (translation unit) physical line and physical column. If the line is
841 zero, then no location is printed. */
842 extern void cpp_error_with_line (cpp_reader *, int, source_location, unsigned,
843 const char *msgid, ...) ATTRIBUTE_PRINTF_5;
846 extern int cpp_ideq (const cpp_token *, const char *);
847 extern void cpp_output_line (cpp_reader *, FILE *);
848 extern void cpp_output_token (const cpp_token *, FILE *);
849 extern const char *cpp_type2name (enum cpp_ttype);
850 /* Returns the value of an escape sequence, truncated to the correct
851 target precision. PSTR points to the input pointer, which is just
852 after the backslash. LIMIT is how much text we have. WIDE is true
853 if the escape sequence is part of a wide character constant or
854 string literal. Handles all relevant diagnostics. */
855 extern cppchar_t cpp_parse_escape (cpp_reader *, const unsigned char ** pstr,
856 const unsigned char *limit, int wide);
860 /* Lookup an identifier in the hashtable. Puts the identifier in the
861 table if it is not already there. */
862 extern cpp_hashnode *cpp_lookup (cpp_reader *, const unsigned char *,
865 typedef int (*cpp_cb) (cpp_reader *, cpp_hashnode *, void *);
866 extern void cpp_forall_identifiers (cpp_reader *, cpp_cb, void *);
869 extern void cpp_scan_nooutput (cpp_reader *);
870 extern int cpp_sys_macro_p (cpp_reader *);
871 extern unsigned char *cpp_quote_string (unsigned char *, const unsigned char *,
875 extern bool cpp_included (cpp_reader *, const char *);
876 extern bool cpp_included_before (cpp_reader *, const char *, source_location);
877 extern void cpp_make_system_header (cpp_reader *, int, int);
878 extern bool cpp_push_include (cpp_reader *, const char *);
879 extern void cpp_change_file (cpp_reader *, enum lc_reason, const char *);
880 extern const char *cpp_get_path (struct _cpp_file *);
881 extern cpp_dir *cpp_get_dir (struct _cpp_file *);
882 extern cpp_buffer *cpp_get_buffer (cpp_reader *);
883 extern struct _cpp_file *cpp_get_file (cpp_buffer *);
884 extern cpp_buffer *cpp_get_prev (cpp_buffer *);
885 extern void cpp_clear_file_cache (cpp_reader *);
888 struct save_macro_data;
889 extern int cpp_save_state (cpp_reader *, FILE *);
890 extern int cpp_write_pch_deps (cpp_reader *, FILE *);
891 extern int cpp_write_pch_state (cpp_reader *, FILE *);
892 extern int cpp_valid_state (cpp_reader *, const char *, int);
893 extern void cpp_prepare_state (cpp_reader *, struct save_macro_data **);
894 extern int cpp_read_state (cpp_reader *, const char *, FILE *,
895 struct save_macro_data *);
901 #endif /* ! LIBCPP_CPPLIB_H */