1 /* Definitions for CPP library. 2 Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002 3 Free Software Foundation, Inc. 4 Written by Per Bothner, 1994-95. 5 6 This program is free software; you can redistribute it and/or modify it 7 under the terms of the GNU General Public License as published by the 8 Free Software Foundation; either version 2, or (at your option) any 9 later version. 10 11 This program is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 GNU General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with this program; if not, write to the Free Software 18 Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 19 20 In other words, you are welcome to use, share and improve this program. 21 You are forbidden to forbid anyone else to use, share and improve 22 what you give them. Help stamp out software-hoarding! */ 23 #ifndef GCC_CPPLIB_H 24 #define GCC_CPPLIB_H 25 26 #include <sys/types.h> 27 #include "hashtable.h" 28 #include "line-map.h" 29 30 #ifdef __cplusplus 31 extern "C" { 32 #endif 33 34 /* For complex reasons, cpp_reader is also typedefed in c-pragma.h. */ 35 #ifndef GCC_C_PRAGMA_H 36 typedef struct cpp_reader cpp_reader; 37 #endif 38 typedef struct cpp_buffer cpp_buffer; 39 typedef struct cpp_options cpp_options; 40 typedef struct cpp_token cpp_token; 41 typedef struct cpp_string cpp_string; 42 typedef struct cpp_hashnode cpp_hashnode; 43 typedef struct cpp_macro cpp_macro; 44 typedef struct cpp_callbacks cpp_callbacks; 45 46 struct answer; 47 struct file_name_map_list; 48 49 /* The first three groups, apart from '=', can appear in preprocessor 50 expressions (+= and -= are used to indicate unary + and - resp.). 51 This allows a lookup table to be implemented in _cpp_parse_expr. 52 53 The first group, to CPP_LAST_EQ, can be immediately followed by an 54 '='. The lexer needs operators ending in '=', like ">>=", to be in 55 the same order as their counterparts without the '=', like ">>". */ 56 57 /* Positions in the table. */ 58 #define CPP_LAST_EQ CPP_MAX 59 #define CPP_FIRST_DIGRAPH CPP_HASH 60 #define CPP_LAST_PUNCTUATOR CPP_DOT_STAR 61 #define CPP_LAST_CPP_OP CPP_LESS_EQ 62 63 #define TTYPE_TABLE \ 64 OP(CPP_EQ = 0, "=") \ 65 OP(CPP_NOT, "!") \ 66 OP(CPP_GREATER, ">") /* compare */ \ 67 OP(CPP_LESS, "<") \ 68 OP(CPP_PLUS, "+") /* math */ \ 69 OP(CPP_MINUS, "-") \ 70 OP(CPP_MULT, "*") \ 71 OP(CPP_DIV, "/") \ 72 OP(CPP_MOD, "%") \ 73 OP(CPP_AND, "&") /* bit ops */ \ 74 OP(CPP_OR, "|") \ 75 OP(CPP_XOR, "^") \ 76 OP(CPP_RSHIFT, ">>") \ 77 OP(CPP_LSHIFT, "<<") \ 78 OP(CPP_MIN, "<?") /* extension */ \ 79 OP(CPP_MAX, ">?") \ 80 \ 81 OP(CPP_COMPL, "~") \ 82 OP(CPP_AND_AND, "&&") /* logical */ \ 83 OP(CPP_OR_OR, "||") \ 84 OP(CPP_QUERY, "?") \ 85 OP(CPP_COLON, ":") \ 86 OP(CPP_COMMA, ",") /* grouping */ \ 87 OP(CPP_OPEN_PAREN, "(") \ 88 OP(CPP_CLOSE_PAREN, ")") \ 89 TK(CPP_EOF, SPELL_NONE) \ 90 OP(CPP_EQ_EQ, "==") /* compare */ \ 91 OP(CPP_NOT_EQ, "!=") \ 92 OP(CPP_GREATER_EQ, ">=") \ 93 OP(CPP_LESS_EQ, "<=") \ 94 \ 95 /* These two are unary + / - in preprocessor expressions. */ \ 96 OP(CPP_PLUS_EQ, "+=") /* math */ \ 97 OP(CPP_MINUS_EQ, "-=") \ 98 \ 99 OP(CPP_MULT_EQ, "*=") \ 100 OP(CPP_DIV_EQ, "/=") \ 101 OP(CPP_MOD_EQ, "%=") \ 102 OP(CPP_AND_EQ, "&=") /* bit ops */ \ 103 OP(CPP_OR_EQ, "|=") \ 104 OP(CPP_XOR_EQ, "^=") \ 105 OP(CPP_RSHIFT_EQ, ">>=") \ 106 OP(CPP_LSHIFT_EQ, "<<=") \ 107 OP(CPP_MIN_EQ, "<?=") /* extension */ \ 108 OP(CPP_MAX_EQ, ">?=") \ 109 /* Digraphs together, beginning with CPP_FIRST_DIGRAPH. */ \ 110 OP(CPP_HASH, "#") /* digraphs */ \ 111 OP(CPP_PASTE, "##") \ 112 OP(CPP_OPEN_SQUARE, "[") \ 113 OP(CPP_CLOSE_SQUARE, "]") \ 114 OP(CPP_OPEN_BRACE, "{") \ 115 OP(CPP_CLOSE_BRACE, "}") \ 116 /* The remainder of the punctuation. Order is not significant. */ \ 117 OP(CPP_SEMICOLON, ";") /* structure */ \ 118 OP(CPP_ELLIPSIS, "...") \ 119 OP(CPP_PLUS_PLUS, "++") /* increment */ \ 120 OP(CPP_MINUS_MINUS, "--") \ 121 OP(CPP_DEREF, "->") /* accessors */ \ 122 OP(CPP_DOT, ".") \ 123 OP(CPP_SCOPE, "::") \ 124 OP(CPP_DEREF_STAR, "->*") \ 125 OP(CPP_DOT_STAR, ".*") \ 126 OP(CPP_ATSIGN, "@") /* used in Objective-C */ \ 127 \ 128 TK(CPP_NAME, SPELL_IDENT) /* word */ \ 129 TK(CPP_NUMBER, SPELL_NUMBER) /* 34_be+ta */ \ 130 \ 131 TK(CPP_CHAR, SPELL_STRING) /* 'char' */ \ 132 TK(CPP_WCHAR, SPELL_STRING) /* L'char' */ \ 133 TK(CPP_OTHER, SPELL_CHAR) /* stray punctuation */ \ 134 \ 135 TK(CPP_STRING, SPELL_STRING) /* "string" */ \ 136 TK(CPP_WSTRING, SPELL_STRING) /* L"string" */ \ 137 TK(CPP_HEADER_NAME, SPELL_STRING) /* <stdio.h> in #include */ \ 138 \ 139 TK(CPP_COMMENT, SPELL_NUMBER) /* Only if output comments. */ \ 140 /* SPELL_NUMBER happens to DTRT. */ \ 141 TK(CPP_MACRO_ARG, SPELL_NONE) /* Macro argument. */ \ 142 TK(CPP_PADDING, SPELL_NONE) /* Whitespace for cpp0. */ 143 144 #define OP(e, s) e, 145 #define TK(e, s) e, 146 enum cpp_ttype 147 { 148 TTYPE_TABLE 149 N_TTYPES 150 }; 151 #undef OP 152 #undef TK 153 154 /* C language kind, used when calling cpp_reader_init. */ 155 enum c_lang {CLK_GNUC89 = 0, CLK_GNUC99, CLK_STDC89, CLK_STDC94, CLK_STDC99, 156 CLK_GNUCXX, CLK_CXX98, CLK_ASM}; 157 158 /* Payload of a NUMBER, STRING, CHAR or COMMENT token. */ 159 struct cpp_string 160 { 161 unsigned int len; 162 const unsigned char *text; 163 }; 164 165 /* Flags for the cpp_token structure. */ 166 #define PREV_WHITE (1 << 0) /* If whitespace before this token. */ 167 #define DIGRAPH (1 << 1) /* If it was a digraph. */ 168 #define STRINGIFY_ARG (1 << 2) /* If macro argument to be stringified. */ 169 #define PASTE_LEFT (1 << 3) /* If on LHS of a ## operator. */ 170 #define NAMED_OP (1 << 4) /* C++ named operators. */ 171 #define NO_EXPAND (1 << 5) /* Do not macro-expand this token. */ 172 #define BOL (1 << 6) /* Token at beginning of line. */ 173 174 /* A preprocessing token. This has been carefully packed and should 175 occupy 16 bytes on 32-bit hosts and 24 bytes on 64-bit hosts. */ 176 struct cpp_token 177 { 178 unsigned int line; /* Logical line of first char of token. */ 179 unsigned short col; /* Column of first char of token. */ 180 ENUM_BITFIELD(cpp_ttype) type : CHAR_BIT; /* token type */ 181 unsigned char flags; /* flags - see above */ 182 183 union 184 { 185 cpp_hashnode *node; /* An identifier. */ 186 const cpp_token *source; /* Inherit padding from this token. */ 187 struct cpp_string str; /* A string, or number. */ 188 unsigned int arg_no; /* Argument no. for a CPP_MACRO_ARG. */ 189 unsigned char c; /* Character represented by CPP_OTHER. */ 190 } val; 191 }; 192 193 /* A type wide enough to hold any multibyte source character. 194 cpplib's character constant interpreter requires an unsigned type. 195 Also, a typedef for the signed equivalent. */ 196 #ifndef MAX_WCHAR_TYPE_SIZE 197 # define MAX_WCHAR_TYPE_SIZE WCHAR_TYPE_SIZE 198 #endif 199 #if CHAR_BIT * SIZEOF_INT >= MAX_WCHAR_TYPE_SIZE 200 # define CPPCHAR_SIGNED_T int 201 #else 202 # if CHAR_BIT * SIZEOF_LONG >= MAX_WCHAR_TYPE_SIZE || !HAVE_LONG_LONG 203 # define CPPCHAR_SIGNED_T long 204 # else 205 # define CPPCHAR_SIGNED_T long long 206 # endif 207 #endif 208 typedef unsigned CPPCHAR_SIGNED_T cppchar_t; 209 typedef CPPCHAR_SIGNED_T cppchar_signed_t; 210 211 /* Values for opts.dump_macros. 212 dump_only means inhibit output of the preprocessed text 213 and instead output the definitions of all user-defined 214 macros in a form suitable for use as input to cpp. 215 dump_names means pass #define and the macro name through to output. 216 dump_definitions means pass the whole definition (plus #define) through 217 */ 218 enum { dump_none = 0, dump_only, dump_names, dump_definitions }; 219 220 /* This structure is nested inside struct cpp_reader, and 221 carries all the options visible to the command line. */ 222 struct cpp_options 223 { 224 /* Characters between tab stops. */ 225 unsigned int tabstop; 226 227 /* Pending options - -D, -U, -A, -I, -ixxx. */ 228 struct cpp_pending *pending; 229 230 /* Search paths for include files. */ 231 struct search_path *quote_include; /* "" */ 232 struct search_path *bracket_include; /* <> */ 233 234 /* Map between header names and file names, used only on DOS where 235 file names are limited in length. */ 236 struct file_name_map_list *map_list; 237 238 /* Directory prefix that should replace `/usr/lib/gcc-lib/TARGET/VERSION' 239 in the standard include file directories. */ 240 const char *include_prefix; 241 unsigned int include_prefix_len; 242 243 /* Directory prefix for system include directories in the standard search 244 path. */ 245 const char *sysroot; 246 247 /* The language we're preprocessing. */ 248 enum c_lang lang; 249 250 /* Non-0 means -v, so print the full set of include dirs. */ 251 unsigned char verbose; 252 253 /* Nonzero means use extra default include directories for C++. */ 254 unsigned char cplusplus; 255 256 /* Nonzero means handle cplusplus style comments */ 257 unsigned char cplusplus_comments; 258 259 /* Nonzero means define __OBJC__, treat @ as a special token, and 260 use the OBJC[PLUS]_INCLUDE_PATH environment variable. */ 261 unsigned char objc; 262 263 /* Nonzero means don't copy comments into the output file. */ 264 unsigned char discard_comments; 265 266 /* Nonzero means don't copy comments into the output file during 267 macro expansion. */ 268 unsigned char discard_comments_in_macro_exp; 269 270 /* Nonzero means process the ISO trigraph sequences. */ 271 unsigned char trigraphs; 272 273 /* Nonzero means process the ISO digraph sequences. */ 274 unsigned char digraphs; 275 276 /* Nonzero means to allow hexadecimal floats and LL suffixes. */ 277 unsigned char extended_numbers; 278 279 /* Nonzero means print names of header files (-H). */ 280 unsigned char print_include_names; 281 282 /* Nonzero means cpp_pedwarn causes a hard error. */ 283 unsigned char pedantic_errors; 284 285 /* Nonzero means don't print warning messages. */ 286 unsigned char inhibit_warnings; 287 288 /* Nonzero means don't suppress warnings from system headers. */ 289 unsigned char warn_system_headers; 290 291 /* Nonzero means don't print error messages. Has no option to 292 select it, but can be set by a user of cpplib (e.g. fix-header). */ 293 unsigned char inhibit_errors; 294 295 /* Nonzero means warn if slash-star appears in a comment. */ 296 unsigned char warn_comments; 297 298 /* Nonzero means warn if there are any trigraphs. */ 299 unsigned char warn_trigraphs; 300 301 /* Nonzero means warn if #import is used. */ 302 unsigned char warn_import; 303 304 /* Nonzero means warn about multicharacter charconsts. */ 305 unsigned char warn_multichar; 306 307 /* Nonzero means warn about various incompatibilities with 308 traditional C. */ 309 unsigned char warn_traditional; 310 311 /* Nonzero means warn about long long numeric constants. */ 312 unsigned char warn_long_long; 313 314 /* Nonzero means warn about text after an #endif (or #else). */ 315 unsigned char warn_endif_labels; 316 317 /* Nonzero means warn about implicit sign changes owing to integer 318 promotions. */ 319 unsigned char warn_num_sign_change; 320 321 /* Nonzero means turn warnings into errors. */ 322 unsigned char warnings_are_errors; 323 324 /* Nonzero causes output not to be done, but directives such as 325 #define that have side effects are still obeyed. */ 326 unsigned char no_output; 327 328 /* Nonzero means we should look for header.gcc files that remap file 329 names. */ 330 unsigned char remap; 331 332 /* Nonzero means don't output line number information. */ 333 unsigned char no_line_commands; 334 335 /* Nonzero means -I- has been seen, so don't look for #include "foo" 336 the source-file directory. */ 337 unsigned char ignore_srcdir; 338 339 /* Zero means dollar signs are punctuation. */ 340 unsigned char dollars_in_ident; 341 342 /* Nonzero means warn if undefined identifiers are evaluated in an #if. */ 343 unsigned char warn_undef; 344 345 /* Nonzero means warn of unused macros from the main file. */ 346 unsigned char warn_unused_macros; 347 348 /* Nonzero for the 1999 C Standard, including corrigenda and amendments. */ 349 unsigned char c99; 350 351 /* Nonzero if we are conforming to a specific C or C++ standard. */ 352 unsigned char std; 353 354 /* Nonzero means give all the error messages the ANSI standard requires. */ 355 unsigned char pedantic; 356 357 /* Nonzero means we're looking at already preprocessed code, so don't 358 bother trying to do macro expansion and whatnot. */ 359 unsigned char preprocessed; 360 361 /* Nonzero disables all the standard directories for headers. */ 362 unsigned char no_standard_includes; 363 364 /* Nonzero disables the C++-specific standard directories for headers. */ 365 unsigned char no_standard_cplusplus_includes; 366 367 /* Nonzero means dump macros in some fashion - see above. */ 368 unsigned char dump_macros; 369 370 /* Nonzero means pass #include lines through to the output. */ 371 unsigned char dump_includes; 372 373 /* Print column number in error messages. */ 374 unsigned char show_column; 375 376 /* Nonzero means handle C++ alternate operator names. */ 377 unsigned char operator_names; 378 379 /* True for traditional preprocessing. */ 380 unsigned char traditional; 381 382 /* Dependency generation. */ 383 struct 384 { 385 /* Style of header dependencies to generate. */ 386 enum {DEPS_NONE = 0, DEPS_USER, DEPS_SYSTEM } style; 387 388 /* Assume missing files are generated files. */ 389 bool missing_files; 390 391 /* Generate phony targets for each dependency apart from the first 392 one. */ 393 bool phony_targets; 394 395 /* If true, no dependency is generated on the main file. */ 396 bool ignore_main_file; 397 } deps; 398 399 /* Target-specific features set by the front end or client. */ 400 401 /* Precision for target CPP arithmetic, target characters, target 402 ints and target wide characters, respectively. */ 403 size_t precision, char_precision, int_precision, wchar_precision; 404 405 /* True means chars (wide chars) are unsigned. */ 406 bool unsigned_char, unsigned_wchar; 407 408 /* Nonzero means __STDC__ should have the value 0 in system headers. */ 409 unsigned char stdc_0_in_system_headers; 410 }; 411 412 /* Call backs. */ 413 struct cpp_callbacks 414 { 415 /* Called when a new line of preprocessed output is started. */ 416 void (*line_change) PARAMS ((cpp_reader *, const cpp_token *, int)); 417 void (*file_change) PARAMS ((cpp_reader *, const struct line_map *)); 418 void (*include) PARAMS ((cpp_reader *, unsigned int, 419 const unsigned char *, const cpp_token *)); 420 void (*define) PARAMS ((cpp_reader *, unsigned int, cpp_hashnode *)); 421 void (*undef) PARAMS ((cpp_reader *, unsigned int, cpp_hashnode *)); 422 void (*ident) PARAMS ((cpp_reader *, unsigned int, const cpp_string *)); 423 void (*def_pragma) PARAMS ((cpp_reader *, unsigned int)); 424 /* Called when the client has a chance to properly register 425 built-ins with cpp_define() and cpp_assert(). */ 426 void (*register_builtins) PARAMS ((cpp_reader *)); 427 }; 428 429 /* Name under which this program was invoked. */ 430 extern const char *progname; 431 432 /* The structure of a node in the hash table. The hash table has 433 entries for all identifiers: either macros defined by #define 434 commands (type NT_MACRO), assertions created with #assert 435 (NT_ASSERTION), or neither of the above (NT_VOID). Builtin macros 436 like __LINE__ are flagged NODE_BUILTIN. Poisioned identifiers are 437 flagged NODE_POISONED. NODE_OPERATOR (C++ only) indicates an 438 identifier that behaves like an operator such as "xor". 439 NODE_DIAGNOSTIC is for speed in lex_token: it indicates a 440 diagnostic may be required for this node. Currently this only 441 applies to __VA_ARGS__ and poisoned identifiers. */ 442 443 /* Hash node flags. */ 444 #define NODE_OPERATOR (1 << 0) /* C++ named operator. */ 445 #define NODE_POISONED (1 << 1) /* Poisoned identifier. */ 446 #define NODE_BUILTIN (1 << 2) /* Builtin macro. */ 447 #define NODE_DIAGNOSTIC (1 << 3) /* Possible diagnostic when lexed. */ 448 #define NODE_WARN (1 << 4) /* Warn if redefined or undefined. */ 449 #define NODE_DISABLED (1 << 5) /* A disabled macro. */ 450 451 /* Different flavors of hash node. */ 452 enum node_type 453 { 454 NT_VOID = 0, /* No definition yet. */ 455 NT_MACRO, /* A macro of some form. */ 456 NT_ASSERTION /* Predicate for #assert. */ 457 }; 458 459 /* Different flavors of builtin macro. _Pragma is an operator, but we 460 handle it with the builtin code for efficiency reasons. */ 461 enum builtin_type 462 { 463 BT_SPECLINE = 0, /* `__LINE__' */ 464 BT_DATE, /* `__DATE__' */ 465 BT_FILE, /* `__FILE__' */ 466 BT_BASE_FILE, /* `__BASE_FILE__' */ 467 BT_INCLUDE_LEVEL, /* `__INCLUDE_LEVEL__' */ 468 BT_TIME, /* `__TIME__' */ 469 BT_STDC, /* `__STDC__' */ 470 BT_PRAGMA /* `_Pragma' operator */ 471 }; 472 473 #define CPP_HASHNODE(HNODE) ((cpp_hashnode *) (HNODE)) 474 #define HT_NODE(NODE) ((ht_identifier *) (NODE)) 475 #define NODE_LEN(NODE) HT_LEN (&(NODE)->ident) 476 #define NODE_NAME(NODE) HT_STR (&(NODE)->ident) 477 478 /* The common part of an identifier node shared amongst all 3 C front 479 ends. Also used to store CPP identifiers, which are a superset of 480 identifiers in the grammatical sense. */ 481 struct cpp_hashnode 482 { 483 struct ht_identifier ident; 484 unsigned short arg_index; /* Macro argument index. */ 485 unsigned char directive_index; /* Index into directive table. */ 486 unsigned char rid_code; /* Rid code - for front ends. */ 487 ENUM_BITFIELD(node_type) type : 8; /* CPP node type. */ 488 unsigned char flags; /* CPP flags. */ 489 490 union 491 { 492 cpp_macro *macro; /* If a macro. */ 493 struct answer *answers; /* Answers to an assertion. */ 494 enum cpp_ttype operator; /* Code for a named operator. */ 495 enum builtin_type builtin; /* Code for a builtin macro. */ 496 } value; 497 }; 498 499 /* Call this first to get a handle to pass to other functions. */ 500 extern cpp_reader *cpp_create_reader PARAMS ((enum c_lang)); 501 502 /* Call this to change the selected language standard (e.g. because of 503 command line options). */ 504 extern void cpp_set_lang PARAMS ((cpp_reader *, enum c_lang)); 505 506 /* Add a dependency TARGET. Quote it for "make" if QUOTE. Can be 507 called any number of times before cpp_read_main_file(). If no 508 targets have been added before cpp_read_main_file(), then the 509 default target is used. */ 510 extern void cpp_add_dependency_target PARAMS ((cpp_reader *, 511 const char * target, 512 int quote)); 513 514 /* Call these to get pointers to the options and callback structures 515 for a given reader. These pointers are good until you call 516 cpp_finish on that reader. You can either edit the callbacks 517 through the pointer returned from cpp_get_callbacks, or set them 518 with cpp_set_callbacks. */ 519 extern cpp_options *cpp_get_options PARAMS ((cpp_reader *)); 520 extern const struct line_maps *cpp_get_line_maps PARAMS ((cpp_reader *)); 521 extern cpp_callbacks *cpp_get_callbacks PARAMS ((cpp_reader *)); 522 extern void cpp_set_callbacks PARAMS ((cpp_reader *, cpp_callbacks *)); 523 524 /* Now call cpp_handle_option[s] to handle 1[or more] switches. The 525 return value is the number of arguments used. If 526 cpp_handle_options returns without using all arguments, it couldn't 527 understand the next switch. Options processing is not completed 528 until you call cpp_finish_options. */ 529 extern int cpp_handle_options PARAMS ((cpp_reader *, int, char **)); 530 extern int cpp_handle_option PARAMS ((cpp_reader *, int, char **)); 531 532 /* This function reads the file, but does not start preprocessing. It 533 returns the name of the original file; this is the same as the 534 input file, except for preprocessed input. This will generate at 535 least one file change callback, and possibly a line change callback 536 too. If there was an error opening the file, it returns NULL. 537 538 If you want cpplib to manage its own hashtable, pass in a NULL 539 pointer. Otherise you should pass in an initialized hash table 540 that cpplib will share; this technique is used by the C front 541 ends. */ 542 extern const char *cpp_read_main_file PARAMS ((cpp_reader *, const char *, 543 struct ht *)); 544 545 /* Deferred handling of command line options that can generate debug 546 callbacks, such as -D and -imacros. Call this after 547 cpp_read_main_file. The front ends need this separation so they 548 can initialize debug output with the original file name, returned 549 from cpp_read_main_file, before they get debug callbacks. */ 550 extern void cpp_finish_options PARAMS ((cpp_reader *)); 551 552 /* Call this to finish preprocessing. If you requested dependency 553 generation, pass an open stream to write the information to, 554 otherwise NULL. It is your responsibility to close the stream. 555 556 Returns cpp_errors (pfile). */ 557 extern int cpp_finish PARAMS ((cpp_reader *, FILE *deps_stream)); 558 559 /* Call this to release the handle at the end of preprocessing. Any 560 use of the handle after this function returns is invalid. Returns 561 cpp_errors (pfile). */ 562 extern void cpp_destroy PARAMS ((cpp_reader *)); 563 564 /* Error count. */ 565 extern unsigned int cpp_errors PARAMS ((cpp_reader *)); 566 567 extern unsigned int cpp_token_len PARAMS ((const cpp_token *)); 568 extern unsigned char *cpp_token_as_text PARAMS ((cpp_reader *, 569 const cpp_token *)); 570 extern unsigned char *cpp_spell_token PARAMS ((cpp_reader *, const cpp_token *, 571 unsigned char *)); 572 extern void cpp_register_pragma PARAMS ((cpp_reader *, 573 const char *, const char *, 574 void (*) PARAMS ((cpp_reader *)))); 575 576 extern int cpp_avoid_paste PARAMS ((cpp_reader *, const cpp_token *, 577 const cpp_token *)); 578 extern const cpp_token *cpp_get_token PARAMS ((cpp_reader *)); 579 extern const unsigned char *cpp_macro_definition PARAMS ((cpp_reader *, 580 const cpp_hashnode *)); 581 extern void _cpp_backup_tokens PARAMS ((cpp_reader *, unsigned int)); 582 583 /* Evaluate a CPP_CHAR or CPP_WCHAR token. */ 584 extern cppchar_t 585 cpp_interpret_charconst PARAMS ((cpp_reader *, const cpp_token *, 586 unsigned int *, int *)); 587 588 /* Used to register builtins during the register_builtins callback. 589 The text is the same as the command line argument. */ 590 extern void cpp_define PARAMS ((cpp_reader *, const char *)); 591 extern void cpp_assert PARAMS ((cpp_reader *, const char *)); 592 extern void cpp_undef PARAMS ((cpp_reader *, const char *)); 593 extern void cpp_unassert PARAMS ((cpp_reader *, const char *)); 594 595 extern cpp_buffer *cpp_push_buffer PARAMS ((cpp_reader *, 596 const unsigned char *, size_t, 597 int, int)); 598 extern int cpp_defined PARAMS ((cpp_reader *, const unsigned char *, int)); 599 600 /* A preprocessing number. Code assumes that any unused high bits of 601 the double integer are set to zero. */ 602 typedef unsigned HOST_WIDE_INT cpp_num_part; 603 typedef struct cpp_num cpp_num; 604 struct cpp_num 605 { 606 cpp_num_part high; 607 cpp_num_part low; 608 bool unsignedp; /* True if value should be treated as unsigned. */ 609 bool overflow; /* True if the most recent calculation overflowed. */ 610 }; 611 612 /* cpplib provides two interfaces for interpretation of preprocessing 613 numbers. 614 615 cpp_classify_number categorizes numeric constants according to 616 their field (integer, floating point, or invalid), radix (decimal, 617 octal, hexadecimal), and type suffixes. */ 618 619 #define CPP_N_CATEGORY 0x000F 620 #define CPP_N_INVALID 0x0000 621 #define CPP_N_INTEGER 0x0001 622 #define CPP_N_FLOATING 0x0002 623 624 #define CPP_N_WIDTH 0x00F0 625 #define CPP_N_SMALL 0x0010 /* int, float. */ 626 #define CPP_N_MEDIUM 0x0020 /* long, double. */ 627 #define CPP_N_LARGE 0x0040 /* long long, long double. */ 628 629 #define CPP_N_RADIX 0x0F00 630 #define CPP_N_DECIMAL 0x0100 631 #define CPP_N_HEX 0x0200 632 #define CPP_N_OCTAL 0x0400 633 #define CPP_N_BINARY 0x0800 634 635 #define CPP_N_UNSIGNED 0x1000 /* Properties. */ 636 #define CPP_N_IMAGINARY 0x2000 637 638 /* Classify a CPP_NUMBER token. The return value is a combination of 639 the flags from the above sets. */ 640 extern unsigned cpp_classify_number PARAMS ((cpp_reader *, const cpp_token *)); 641 642 /* Evaluate a token classified as category CPP_N_INTEGER. */ 643 extern cpp_num cpp_interpret_integer PARAMS ((cpp_reader *, const cpp_token *, 644 unsigned int type)); 645 646 /* Sign extend a number, with PRECISION significant bits and all 647 others assumed clear, to fill out a cpp_num structure. */ 648 cpp_num cpp_num_sign_extend PARAMS ((cpp_num, size_t)); 649 650 /* Diagnostic levels. To get a dianostic without associating a 651 position in the translation unit with it, use cpp_error_with_line 652 with a line number of zero. */ 653 654 /* Warning, an error with -Werror. */ 655 #define DL_WARNING 0x00 656 /* Same as DL_WARNING, except it is not suppressed in system headers. */ 657 #define DL_WARNING_SYSHDR 0x01 658 /* Warning, an error with -pedantic-errors or -Werror. */ 659 #define DL_PEDWARN 0x02 660 /* An error. */ 661 #define DL_ERROR 0x03 662 /* An internal consistency check failed. Prints "internal error: ", 663 otherwise the same as DL_ERROR. */ 664 #define DL_ICE 0x04 665 /* Extracts a diagnostic level from an int. */ 666 #define DL_EXTRACT(l) (l & 0xf) 667 /* Nonzero if a diagnostic level is one of the warnings. */ 668 #define DL_WARNING_P(l) (DL_EXTRACT (l) >= DL_WARNING \ 669 && DL_EXTRACT (l) <= DL_PEDWARN) 670 671 /* N.B. The error-message-printer prototypes have not been nicely 672 formatted because exgettext needs to see 'msgid' on the same line 673 as the name of the function in order to work properly. Only the 674 string argument gets a name in an effort to keep the lines from 675 getting ridiculously oversized. */ 676 677 /* Output a diagnostic of some kind. */ 678 extern void cpp_error PARAMS ((cpp_reader *, int, const char *msgid, ...)) 679 ATTRIBUTE_PRINTF_3; 680 681 /* Output a diagnostic of severity LEVEL, with "MSG: " preceding the 682 error string of errno. No location is printed. */ 683 extern void cpp_errno PARAMS ((cpp_reader *, int level, const char *msg)); 684 685 /* Same as cpp_error, except additionally specifies a position as a 686 (translation unit) physical line and physical column. If the line is 687 zero, then no location is printed. */ 688 extern void cpp_error_with_line PARAMS ((cpp_reader *, int, unsigned, unsigned, const char *msgid, ...)) 689 ATTRIBUTE_PRINTF_5; 690 691 /* In cpplex.c */ 692 extern int cpp_ideq PARAMS ((const cpp_token *, 693 const char *)); 694 extern void cpp_output_line PARAMS ((cpp_reader *, FILE *)); 695 extern void cpp_output_token PARAMS ((const cpp_token *, FILE *)); 696 extern const char *cpp_type2name PARAMS ((enum cpp_ttype)); 697 /* Returns the value of an escape sequence, truncated to the correct 698 target precision. PSTR points to the input pointer, which is just 699 after the backslash. LIMIT is how much text we have. WIDE is true 700 if the escape sequence is part of a wide character constant or 701 string literal. Handles all relevant diagnostics. */ 702 extern cppchar_t cpp_parse_escape PARAMS ((cpp_reader *, 703 const unsigned char ** pstr, 704 const unsigned char *limit, 705 int wide)); 706 707 /* In cpphash.c */ 708 709 /* Lookup an identifier in the hashtable. Puts the identifier in the 710 table if it is not already there. */ 711 extern cpp_hashnode *cpp_lookup PARAMS ((cpp_reader *, 712 const unsigned char *, 713 unsigned int)); 714 715 typedef int (*cpp_cb) PARAMS ((cpp_reader *, cpp_hashnode *, void *)); 716 extern void cpp_forall_identifiers PARAMS ((cpp_reader *, 717 cpp_cb, void *)); 718 719 /* In cppmacro.c */ 720 extern void cpp_scan_nooutput PARAMS ((cpp_reader *)); 721 extern int cpp_sys_macro_p PARAMS ((cpp_reader *)); 722 extern unsigned char *cpp_quote_string PARAMS ((unsigned char *, 723 const unsigned char *, 724 unsigned int)); 725 726 /* In cppfiles.c */ 727 extern int cpp_included PARAMS ((cpp_reader *, const char *)); 728 extern void cpp_make_system_header PARAMS ((cpp_reader *, int, int)); 729 730 /* In cppmain.c */ 731 extern void cpp_preprocess_file PARAMS ((cpp_reader *, const char *, FILE *)); 732 733 #ifdef __cplusplus 734 } 735 #endif 736 737 #endif /* ! GCC_CPPLIB_H */ 738