libcpp/include/cpplib.h

   1 /* Definitions for CPP library.
   2    Copyright (C) 1995-2014 Free Software Foundation, Inc.
   3    Written by Per Bothner, 1994-95.
   4
   5 This program is free software; you can redistribute it and/or modify it
   6 under the terms of the GNU General Public License as published by the
   7 Free Software Foundation; either version 3, or (at your option) any
   8 later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program; see the file COPYING3.  If not see
  17 <http://www.gnu.org/licenses/>.
  18
  19  In other words, you are welcome to use, share and improve this program.
  20  You are forbidden to forbid anyone else to use, share and improve
  21  what you give them.   Help stamp out software-hoarding!  */
  22 #ifndef LIBCPP_CPPLIB_H
  23 #define LIBCPP_CPPLIB_H
  24
  25 #include <sys/types.h>
  26 #include "symtab.h"
  27 #include "line-map.h"
  28
  29 typedef struct cpp_reader cpp_reader;
  30 typedef struct cpp_buffer cpp_buffer;
  31 typedef struct cpp_options cpp_options;
  32 typedef struct cpp_token cpp_token;
  33 typedef struct cpp_string cpp_string;
  34 typedef struct cpp_hashnode cpp_hashnode;
  35 typedef struct cpp_macro cpp_macro;
  36 typedef struct cpp_callbacks cpp_callbacks;
  37 typedef struct cpp_dir cpp_dir;
  38
  39 struct answer;
  40 struct _cpp_file;
  41
  42 /* The first three groups, apart from '=', can appear in preprocessor
  43    expressions (+= and -= are used to indicate unary + and - resp.).
  44    This allows a lookup table to be implemented in _cpp_parse_expr.
  45
  46    The first group, to CPP_LAST_EQ, can be immediately followed by an
  47    '='.  The lexer needs operators ending in '=', like ">>=", to be in
  48    the same order as their counterparts without the '=', like ">>".
  49
  50    See the cpp_operator table optab in expr.c if you change the order or
  51    add or remove anything in the first group.  */
  52
  53 #define TTYPE_TABLE                                                     \
  54   OP(EQ,                "=")                                            \
  55   OP(NOT,               "!")                                            \
  56   OP(GREATER,           ">")    /* compare */                           \
  57   OP(LESS,              "<")                                            \
  58   OP(PLUS,              "+")    /* math */                              \
  59   OP(MINUS,             "-")                                            \
  60   OP(MULT,              "*")                                            \
  61   OP(DIV,               "/")                                            \
  62   OP(MOD,               "%")                                            \
  63   OP(AND,               "&")    /* bit ops */                           \
  64   OP(OR,                "|")                                            \
  65   OP(XOR,               "^")                                            \
  66   OP(RSHIFT,            ">>")                                           \
  67   OP(LSHIFT,            "<<")                                           \
  68                                                                         \
  69   OP(COMPL,             "~")                                            \
  70   OP(AND_AND,           "&&")   /* logical */                           \
  71   OP(OR_OR,             "||")                                           \
  72   OP(QUERY,             "?")                                            \
  73   OP(COLON,             ":")                                            \
  74   OP(COMMA,             ",")    /* grouping */                          \
  75   OP(OPEN_PAREN,        "(")                                            \
  76   OP(CLOSE_PAREN,       ")")                                            \
  77   TK(EOF,               NONE)                                           \
  78   OP(EQ_EQ,             "==")   /* compare */                           \
  79   OP(NOT_EQ,            "!=")                                           \
  80   OP(GREATER_EQ,        ">=")                                           \
  81   OP(LESS_EQ,           "<=")                                           \
  82                                                                         \
  83   /* These two are unary + / - in preprocessor expressions.  */         \
  84   OP(PLUS_EQ,           "+=")   /* math */                              \
  85   OP(MINUS_EQ,          "-=")                                           \
  86                                                                         \
  87   OP(MULT_EQ,           "*=")                                           \
  88   OP(DIV_EQ,            "/=")                                           \
  89   OP(MOD_EQ,            "%=")                                           \
  90   OP(AND_EQ,            "&=")   /* bit ops */                           \
  91   OP(OR_EQ,             "|=")                                           \
  92   OP(XOR_EQ,            "^=")                                           \
  93   OP(RSHIFT_EQ,         ">>=")                                          \
  94   OP(LSHIFT_EQ,         "<<=")                                          \
  95   /* Digraphs together, beginning with CPP_FIRST_DIGRAPH.  */           \
  96   OP(HASH,              "#")    /* digraphs */                          \
  97   OP(PASTE,             "##")                                           \
  98   OP(OPEN_SQUARE,       "[")                                            \
  99   OP(CLOSE_SQUARE,      "]")                                            \
 100   OP(OPEN_BRACE,        "{")                                            \
 101   OP(CLOSE_BRACE,       "}")                                            \
 102   /* The remainder of the punctuation.  Order is not significant.  */   \
 103   OP(SEMICOLON,         ";")    /* structure */                         \
 104   OP(ELLIPSIS,          "...")                                          \
 105   OP(PLUS_PLUS,         "++")   /* increment */                         \
 106   OP(MINUS_MINUS,       "--")                                           \
 107   OP(DEREF,             "->")   /* accessors */                         \
 108   OP(DOT,               ".")                                            \
 109   OP(SCOPE,             "::")                                           \
 110   OP(DEREF_STAR,        "->*")                                          \
 111   OP(DOT_STAR,          ".*")                                           \
 112   OP(ATSIGN,            "@")  /* used in Objective-C */                 \
 113                                                                         \
 114   TK(NAME,              IDENT)   /* word */                             \
 115   TK(AT_NAME,           IDENT)   /* @word - Objective-C */              \
 116   TK(NUMBER,            LITERAL) /* 34_be+ta  */                        \
 117                                                                         \
 118   TK(CHAR,              LITERAL) /* 'char' */                           \
 119   TK(WCHAR,             LITERAL) /* L'char' */                          \
 120   TK(CHAR16,            LITERAL) /* u'char' */                          \
 121   TK(CHAR32,            LITERAL) /* U'char' */                          \
 122   TK(OTHER,             LITERAL) /* stray punctuation */                \
 123                                                                         \
 124   TK(STRING,            LITERAL) /* "string" */                         \
 125   TK(WSTRING,           LITERAL) /* L"string" */                        \
 126   TK(STRING16,          LITERAL) /* u"string" */                        \
 127   TK(STRING32,          LITERAL) /* U"string" */                        \
 128   TK(UTF8STRING,        LITERAL) /* u8"string" */                       \
 129   TK(OBJC_STRING,       LITERAL) /* @"string" - Objective-C */          \
 130   TK(HEADER_NAME,       LITERAL) /* <stdio.h> in #include */            \
 131                                                                         \
 132   TK(CHAR_USERDEF,      LITERAL) /* 'char'_suffix - C++-0x */           \
 133   TK(WCHAR_USERDEF,     LITERAL) /* L'char'_suffix - C++-0x */          \
 134   TK(CHAR16_USERDEF,    LITERAL) /* u'char'_suffix - C++-0x */          \
 135   TK(CHAR32_USERDEF,    LITERAL) /* U'char'_suffix - C++-0x */          \
 136   TK(STRING_USERDEF,    LITERAL) /* "string"_suffix - C++-0x */         \
 137   TK(WSTRING_USERDEF,   LITERAL) /* L"string"_suffix - C++-0x */        \
 138   TK(STRING16_USERDEF,  LITERAL) /* u"string"_suffix - C++-0x */        \
 139   TK(STRING32_USERDEF,  LITERAL) /* U"string"_suffix - C++-0x */        \
 140   TK(UTF8STRING_USERDEF,LITERAL) /* u8"string"_suffix - C++-0x */       \
 141                                                                         \
 142   TK(COMMENT,           LITERAL) /* Only if output comments.  */        \
 143                                  /* SPELL_LITERAL happens to DTRT.  */  \
 144   TK(MACRO_ARG,         NONE)    /* Macro argument.  */                 \
 145   TK(PRAGMA,            NONE)    /* Only for deferred pragmas.  */      \
 146   TK(PRAGMA_EOL,        NONE)    /* End-of-line for deferred pragmas.  */ \
 147   TK(PADDING,           NONE)    /* Whitespace for -E.  */
 148
 149 #define OP(e, s) CPP_ ## e,
 150 #define TK(e, s) CPP_ ## e,
 151 enum cpp_ttype
 152 {
 153   TTYPE_TABLE
 154   N_TTYPES,
 155
 156   /* A token type for keywords, as opposed to ordinary identifiers.  */
 157   CPP_KEYWORD,
 158
 159   /* Positions in the table.  */
 160   CPP_LAST_EQ        = CPP_LSHIFT,
 161   CPP_FIRST_DIGRAPH  = CPP_HASH,
 162   CPP_LAST_PUNCTUATOR= CPP_ATSIGN,
 163   CPP_LAST_CPP_OP    = CPP_LESS_EQ
 164 };
 165 #undef OP
 166 #undef TK
 167
 168 /* C language kind, used when calling cpp_create_reader.  */
 169 enum c_lang {CLK_GNUC89 = 0, CLK_GNUC99, CLK_GNUC11,
 170              CLK_STDC89, CLK_STDC94, CLK_STDC99, CLK_STDC11,
 171              CLK_GNUCXX, CLK_CXX98, CLK_GNUCXX11, CLK_CXX11,
 172              CLK_GNUCXX14, CLK_CXX14, CLK_GNUCXX1Z, CLK_CXX1Z, CLK_ASM};
 173
 174 /* Payload of a NUMBER, STRING, CHAR or COMMENT token.  */
 175 struct GTY(()) cpp_string {
 176   unsigned int len;
 177   const unsigned char *text;
 178 };
 179
 180 /* Flags for the cpp_token structure.  */
 181 #define PREV_WHITE      (1 << 0) /* If whitespace before this token.  */
 182 #define DIGRAPH         (1 << 1) /* If it was a digraph.  */
 183 #define STRINGIFY_ARG   (1 << 2) /* If macro argument to be stringified.  */
 184 #define PASTE_LEFT      (1 << 3) /* If on LHS of a ## operator.  */
 185 #define NAMED_OP        (1 << 4) /* C++ named operators.  */
 186 #define NO_EXPAND       (1 << 5) /* Do not macro-expand this token.  */
 187 #define BOL             (1 << 6) /* Token at beginning of line.  */
 188 #define PURE_ZERO       (1 << 7) /* Single 0 digit, used by the C++ frontend,
 189                                     set in c-lex.c.  */
 190 #define SP_DIGRAPH      (1 << 8) /* # or ## token was a digraph.  */
 191 #define SP_PREV_WHITE   (1 << 9) /* If whitespace before a ##
 192                                     operator, or before this token
 193                                     after a # operator.  */
 194
 195 /* Specify which field, if any, of the cpp_token union is used.  */
 196
 197 enum cpp_token_fld_kind {
 198   CPP_TOKEN_FLD_NODE,
 199   CPP_TOKEN_FLD_SOURCE,
 200   CPP_TOKEN_FLD_STR,
 201   CPP_TOKEN_FLD_ARG_NO,
 202   CPP_TOKEN_FLD_TOKEN_NO,
 203   CPP_TOKEN_FLD_PRAGMA,
 204   CPP_TOKEN_FLD_NONE
 205 };
 206
 207 /* A macro argument in the cpp_token union.  */
 208 struct GTY(()) cpp_macro_arg {
 209   /* Argument number.  */
 210   unsigned int arg_no;
 211 };
 212
 213 /* An identifier in the cpp_token union.  */
 214 struct GTY(()) cpp_identifier {
 215   /* The canonical (UTF-8) spelling of the identifier.  */
 216   cpp_hashnode *
 217     GTY ((nested_ptr (union tree_node,
 218                 "%h ? CPP_HASHNODE (GCC_IDENT_TO_HT_IDENT (%h)) : NULL",
 219                         "%h ? HT_IDENT_TO_GCC_IDENT (HT_NODE (%h)) : NULL")))
 220        node;
 221 };
 222
 223 /* A preprocessing token.  This has been carefully packed and should
 224    occupy 16 bytes on 32-bit hosts and 24 bytes on 64-bit hosts.  */
 225 struct GTY(()) cpp_token {
 226   source_location src_loc;      /* Location of first char of token.  */
 227   ENUM_BITFIELD(cpp_ttype) type : CHAR_BIT;  /* token type */
 228   unsigned short flags;         /* flags - see above */
 229
 230   union cpp_token_u
 231   {
 232     /* An identifier.  */
 233     struct cpp_identifier GTY ((tag ("CPP_TOKEN_FLD_NODE"))) node;
 234
 235     /* Inherit padding from this token.  */
 236     cpp_token * GTY ((tag ("CPP_TOKEN_FLD_SOURCE"))) source;
 237
 238     /* A string, or number.  */
 239     struct cpp_string GTY ((tag ("CPP_TOKEN_FLD_STR"))) str;
 240
 241     /* Argument no. for a CPP_MACRO_ARG.  */
 242     struct cpp_macro_arg GTY ((tag ("CPP_TOKEN_FLD_ARG_NO"))) macro_arg;
 243
 244     /* Original token no. for a CPP_PASTE (from a sequence of
 245        consecutive paste tokens in a macro expansion).  */
 246     unsigned int GTY ((tag ("CPP_TOKEN_FLD_TOKEN_NO"))) token_no;
 247
 248     /* Caller-supplied identifier for a CPP_PRAGMA.  */
 249     unsigned int GTY ((tag ("CPP_TOKEN_FLD_PRAGMA"))) pragma;
 250   } GTY ((desc ("cpp_token_val_index (&%1)"))) val;
 251 };
 252
 253 /* Say which field is in use.  */
 254 extern enum cpp_token_fld_kind cpp_token_val_index (const cpp_token *tok);
 255
 256 /* A type wide enough to hold any multibyte source character.
 257    cpplib's character constant interpreter requires an unsigned type.
 258    Also, a typedef for the signed equivalent.
 259    The width of this type is capped at 32 bits; there do exist targets
 260    where wchar_t is 64 bits, but only in a non-default mode, and there
 261    would be no meaningful interpretation for a wchar_t value greater
 262    than 2^32 anyway -- the widest wide-character encoding around is
 263    ISO 10646, which stops at 2^31.  */
 264 #if CHAR_BIT * SIZEOF_INT >= 32
 265 # define CPPCHAR_SIGNED_T int
 266 #elif CHAR_BIT * SIZEOF_LONG >= 32
 267 # define CPPCHAR_SIGNED_T long
 268 #else
 269 # error "Cannot find a least-32-bit signed integer type"
 270 #endif
 271 typedef unsigned CPPCHAR_SIGNED_T cppchar_t;
 272 typedef CPPCHAR_SIGNED_T cppchar_signed_t;
 273
 274 /* Style of header dependencies to generate.  */
 275 enum cpp_deps_style { DEPS_NONE = 0, DEPS_USER, DEPS_SYSTEM };
 276
 277 /* The possible normalization levels, from most restrictive to least.  */
 278 enum cpp_normalize_level {
 279   /* In NFKC.  */
 280   normalized_KC = 0,
 281   /* In NFC.  */
 282   normalized_C,
 283   /* In NFC, except for subsequences where being in NFC would make
 284      the identifier invalid.  */
 285   normalized_identifier_C,
 286   /* Not normalized at all.  */
 287   normalized_none
 288 };
 289
 290 /* This structure is nested inside struct cpp_reader, and
 291    carries all the options visible to the command line.  */
 292 struct cpp_options
 293 {
 294   /* Characters between tab stops.  */
 295   unsigned int tabstop;
 296
 297   /* The language we're preprocessing.  */
 298   enum c_lang lang;
 299
 300   /* Nonzero means use extra default include directories for C++.  */
 301   unsigned char cplusplus;
 302
 303   /* Nonzero means handle cplusplus style comments.  */
 304   unsigned char cplusplus_comments;
 305
 306   /* Nonzero means define __OBJC__, treat @ as a special token, use
 307      the OBJC[PLUS]_INCLUDE_PATH environment variable, and allow
 308      "#import".  */
 309   unsigned char objc;
 310
 311   /* Nonzero means don't copy comments into the output file.  */
 312   unsigned char discard_comments;
 313
 314   /* Nonzero means don't copy comments into the output file during
 315      macro expansion.  */
 316   unsigned char discard_comments_in_macro_exp;
 317
 318   /* Nonzero means process the ISO trigraph sequences.  */
 319   unsigned char trigraphs;
 320
 321   /* Nonzero means process the ISO digraph sequences.  */
 322   unsigned char digraphs;
 323
 324   /* Nonzero means to allow hexadecimal floats and LL suffixes.  */
 325   unsigned char extended_numbers;
 326
 327   /* Nonzero means process u/U prefix literals (UTF-16/32).  */
 328   unsigned char uliterals;
 329
 330   /* Nonzero means process r/R raw strings.  If this is set, uliterals
 331      must be set as well.  */
 332   unsigned char rliterals;
 333
 334   /* Nonzero means print names of header files (-H).  */
 335   unsigned char print_include_names;
 336
 337   /* Nonzero means complain about deprecated features.  */
 338   unsigned char cpp_warn_deprecated;
 339
 340   /* Nonzero means warn if slash-star appears in a comment.  */
 341   unsigned char warn_comments;
 342
 343   /* Nonzero means to warn about __DATA__, __TIME__ and __TIMESTAMP__ usage.   */
 344   unsigned char warn_date_time;
 345
 346   /* Nonzero means warn if a user-supplied include directory does not
 347      exist.  */
 348   unsigned char warn_missing_include_dirs;
 349
 350   /* Nonzero means warn if there are any trigraphs.  */
 351   unsigned char warn_trigraphs;
 352
 353   /* Nonzero means warn about multicharacter charconsts.  */
 354   unsigned char warn_multichar;
 355
 356   /* Nonzero means warn about various incompatibilities with
 357      traditional C.  */
 358   unsigned char cpp_warn_traditional;
 359
 360   /* Nonzero means warn about long long numeric constants.  */
 361   unsigned char cpp_warn_long_long;
 362
 363   /* Nonzero means warn about text after an #endif (or #else).  */
 364   unsigned char warn_endif_labels;
 365
 366   /* Nonzero means warn about implicit sign changes owing to integer
 367      promotions.  */
 368   unsigned char warn_num_sign_change;
 369
 370   /* Zero means don't warn about __VA_ARGS__ usage in c89 pedantic mode.
 371      Presumably the usage is protected by the appropriate #ifdef.  */
 372   unsigned char warn_variadic_macros;
 373
 374   /* Nonzero means warn about builtin macros that are redefined or
 375      explicitly undefined.  */
 376   unsigned char warn_builtin_macro_redefined;
 377
 378   /* Nonzero means we should look for header.gcc files that remap file
 379      names.  */
 380   unsigned char remap;
 381
 382   /* Zero means dollar signs are punctuation.  */
 383   unsigned char dollars_in_ident;
 384
 385   /* Nonzero means UCNs are accepted in identifiers.  */
 386   unsigned char extended_identifiers;
 387
 388   /* True if we should warn about dollars in identifiers or numbers
 389      for this translation unit.  */
 390   unsigned char warn_dollars;
 391
 392   /* Nonzero means warn if undefined identifiers are evaluated in an #if.  */
 393   unsigned char warn_undef;
 394
 395   /* Nonzero means warn of unused macros from the main file.  */
 396   unsigned char warn_unused_macros;
 397
 398   /* Nonzero for the 1999 C Standard, including corrigenda and amendments.  */
 399   unsigned char c99;
 400
 401   /* Nonzero if we are conforming to a specific C or C++ standard.  */
 402   unsigned char std;
 403
 404   /* Nonzero means give all the error messages the ANSI standard requires.  */
 405   unsigned char cpp_pedantic;
 406
 407   /* Nonzero means we're looking at already preprocessed code, so don't
 408      bother trying to do macro expansion and whatnot.  */
 409   unsigned char preprocessed;
 410
 411   /* Nonzero means we are going to emit debugging logs during
 412      preprocessing.  */
 413   unsigned char debug;
 414
 415   /* Nonzero means we are tracking locations of tokens involved in
 416      macro expansion. 1 Means we track the location in degraded mode
 417      where we do not track locations of tokens resulting from the
 418      expansion of arguments of function-like macro.  2 Means we do
 419      track all macro expansions. This last option is the one that
 420      consumes the highest amount of memory.  */
 421   unsigned char track_macro_expansion;
 422
 423   /* Nonzero means handle C++ alternate operator names.  */
 424   unsigned char operator_names;
 425
 426   /* Nonzero means warn about use of C++ alternate operator names.  */
 427   unsigned char warn_cxx_operator_names;
 428
 429   /* True for traditional preprocessing.  */
 430   unsigned char traditional;
 431
 432   /* Nonzero for C++ 2011 Standard user-defined literals.  */
 433   unsigned char user_literals;
 434
 435   /* Nonzero means warn when a string or character literal is followed by a
 436      ud-suffix which does not beging with an underscore.  */
 437   unsigned char warn_literal_suffix;
 438
 439   /* Nonzero means interpret imaginary, fixed-point, or other gnu extension
 440      literal number suffixes as user-defined literal number suffixes.  */
 441   unsigned char ext_numeric_literals;
 442
 443   /* Nonzero means extended identifiers allow the characters specified
 444      in C11 and C++11.  */
 445   unsigned char c11_identifiers;
 446
 447   /* Nonzero for C++ 2014 Standard binary constants.  */
 448   unsigned char binary_constants;
 449
 450   /* Nonzero for C++ 2014 Standard digit separators.  */
 451   unsigned char digit_separators;
 452
 453   /* Holds the name of the target (execution) character set.  */
 454   const char *narrow_charset;
 455
 456   /* Holds the name of the target wide character set.  */
 457   const char *wide_charset;
 458
 459   /* Holds the name of the input character set.  */
 460   const char *input_charset;
 461
 462   /* The minimum permitted level of normalization before a warning
 463      is generated.  See enum cpp_normalize_level.  */
 464   int warn_normalize;
 465
 466   /* True to warn about precompiled header files we couldn't use.  */
 467   bool warn_invalid_pch;
 468
 469   /* True if dependencies should be restored from a precompiled header.  */
 470   bool restore_pch_deps;
 471
 472   /* True if warn about differences between C90 and C99.  */
 473   signed char cpp_warn_c90_c99_compat;
 474
 475   /* Dependency generation.  */
 476   struct
 477   {
 478     /* Style of header dependencies to generate.  */
 479     enum cpp_deps_style style;
 480
 481     /* Assume missing files are generated files.  */
 482     bool missing_files;
 483
 484     /* Generate phony targets for each dependency apart from the first
 485        one.  */
 486     bool phony_targets;
 487
 488     /* If true, no dependency is generated on the main file.  */
 489     bool ignore_main_file;
 490
 491     /* If true, intend to use the preprocessor output (e.g., for compilation)
 492        in addition to the dependency info.  */
 493     bool need_preprocessor_output;
 494   } deps;
 495
 496   /* Target-specific features set by the front end or client.  */
 497
 498   /* Precision for target CPP arithmetic, target characters, target
 499      ints and target wide characters, respectively.  */
 500   size_t precision, char_precision, int_precision, wchar_precision;
 501
 502   /* True means chars (wide chars) are unsigned.  */
 503   bool unsigned_char, unsigned_wchar;
 504
 505   /* True if the most significant byte in a word has the lowest
 506      address in memory.  */
 507   bool bytes_big_endian;
 508
 509   /* Nonzero means __STDC__ should have the value 0 in system headers.  */
 510   unsigned char stdc_0_in_system_headers;
 511
 512   /* True disables tokenization outside of preprocessing directives. */
 513   bool directives_only;
 514
 515   /* True enables canonicalization of system header file paths. */
 516   bool canonical_system_headers;
 517 };
 518
 519 /* Callback for header lookup for HEADER, which is the name of a
 520    source file.  It is used as a method of last resort to find headers
 521    that are not otherwise found during the normal include processing.
 522    The return value is the malloced name of a header to try and open,
 523    if any, or NULL otherwise.  This callback is called only if the
 524    header is otherwise unfound.  */
 525 typedef const char *(*missing_header_cb)(cpp_reader *, const char *header, cpp_dir **);
 526
 527 /* Call backs to cpplib client.  */
 528 struct cpp_callbacks
 529 {
 530   /* Called when a new line of preprocessed output is started.  */
 531   void (*line_change) (cpp_reader *, const cpp_token *, int);
 532
 533   /* Called when switching to/from a new file.
 534      The line_map is for the new file.  It is NULL if there is no new file.
 535      (In C this happens when done with <built-in>+<command line> and also
 536      when done with a main file.)  This can be used for resource cleanup.  */
 537   void (*file_change) (cpp_reader *, const struct line_map *);
 538
 539   void (*dir_change) (cpp_reader *, const char *);
 540   void (*include) (cpp_reader *, source_location, const unsigned char *,
 541                    const char *, int, const cpp_token **);
 542   void (*define) (cpp_reader *, source_location, cpp_hashnode *);
 543   void (*undef) (cpp_reader *, source_location, cpp_hashnode *);
 544   void (*ident) (cpp_reader *, source_location, const cpp_string *);
 545   void (*def_pragma) (cpp_reader *, source_location);
 546   int (*valid_pch) (cpp_reader *, const char *, int);
 547   void (*read_pch) (cpp_reader *, const char *, int, const char *);
 548   missing_header_cb missing_header;
 549
 550   /* Context-sensitive macro support.  Returns macro (if any) that should
 551      be expanded.  */
 552   cpp_hashnode * (*macro_to_expand) (cpp_reader *, const cpp_token *);
 553
 554   /* Called to emit a diagnostic.  This callback receives the
 555      translated message.  */
 556   bool (*error) (cpp_reader *, int, int, source_location, unsigned int,
 557                  const char *, va_list *)
 558        ATTRIBUTE_FPTR_PRINTF(6,0);
 559
 560   /* Callbacks for when a macro is expanded, or tested (whether
 561      defined or not at the time) in #ifdef, #ifndef or "defined".  */
 562   void (*used_define) (cpp_reader *, source_location, cpp_hashnode *);
 563   void (*used_undef) (cpp_reader *, source_location, cpp_hashnode *);
 564   /* Called before #define and #undef or other macro definition
 565      changes are processed.  */
 566   void (*before_define) (cpp_reader *);
 567   /* Called whenever a macro is expanded or tested.
 568      Second argument is the location of the start of the current expansion.  */
 569   void (*used) (cpp_reader *, source_location, cpp_hashnode *);
 570
 571   /* Callback that can change a user builtin into normal macro.  */
 572   bool (*user_builtin_macro) (cpp_reader *, cpp_hashnode *);
 573 };
 574
 575 #ifdef VMS
 576 #define INO_T_CPP ino_t ino[3]
 577 #else
 578 #define INO_T_CPP ino_t ino
 579 #endif
 580
 581 /* Chain of directories to look for include files in.  */
 582 struct cpp_dir
 583 {
 584   /* NULL-terminated singly-linked list.  */
 585   struct cpp_dir *next;
 586
 587   /* NAME of the directory, NUL-terminated.  */
 588   char *name;
 589   unsigned int len;
 590
 591   /* One if a system header, two if a system header that has extern
 592      "C" guards for C++.  */
 593   unsigned char sysp;
 594
 595   /* Is this a user-supplied directory? */
 596   bool user_supplied_p;
 597
 598   /* The canonicalized NAME as determined by lrealpath.  This field
 599      is only used by hosts that lack reliable inode numbers.  */
 600   char *canonical_name;
 601
 602   /* Mapping of file names for this directory for MS-DOS and related
 603      platforms.  A NULL-terminated array of (from, to) pairs.  */
 604   const char **name_map;
 605
 606   /* Routine to construct pathname, given the search path name and the
 607      HEADER we are trying to find, return a constructed pathname to
 608      try and open.  If this is NULL, the constructed pathname is as
 609      constructed by append_file_to_dir.  */
 610   char *(*construct) (const char *header, cpp_dir *dir);
 611
 612   /* The C front end uses these to recognize duplicated
 613      directories in the search path.  */
 614   INO_T_CPP;
 615   dev_t dev;
 616 };
 617
 618 /* The structure of a node in the hash table.  The hash table has
 619    entries for all identifiers: either macros defined by #define
 620    commands (type NT_MACRO), assertions created with #assert
 621    (NT_ASSERTION), or neither of the above (NT_VOID).  Builtin macros
 622    like __LINE__ are flagged NODE_BUILTIN.  Poisoned identifiers are
 623    flagged NODE_POISONED.  NODE_OPERATOR (C++ only) indicates an
 624    identifier that behaves like an operator such as "xor".
 625    NODE_DIAGNOSTIC is for speed in lex_token: it indicates a
 626    diagnostic may be required for this node.  Currently this only
 627    applies to __VA_ARGS__, poisoned identifiers, and -Wc++-compat
 628    warnings about NODE_OPERATOR.  */
 629
 630 /* Hash node flags.  */
 631 #define NODE_OPERATOR   (1 << 0)        /* C++ named operator.  */
 632 #define NODE_POISONED   (1 << 1)        /* Poisoned identifier.  */
 633 #define NODE_BUILTIN    (1 << 2)        /* Builtin macro.  */
 634 #define NODE_DIAGNOSTIC (1 << 3)        /* Possible diagnostic when lexed.  */
 635 #define NODE_WARN       (1 << 4)        /* Warn if redefined or undefined.  */
 636 #define NODE_DISABLED   (1 << 5)        /* A disabled macro.  */
 637 #define NODE_MACRO_ARG  (1 << 6)        /* Used during #define processing.  */
 638 #define NODE_USED       (1 << 7)        /* Dumped with -dU.  */
 639 #define NODE_CONDITIONAL (1 << 8)       /* Conditional macro */
 640 #define NODE_WARN_OPERATOR (1 << 9)     /* Warn about C++ named operator.  */
 641
 642 /* Different flavors of hash node.  */
 643 enum node_type
 644 {
 645   NT_VOID = 0,     /* No definition yet.  */
 646   NT_MACRO,        /* A macro of some form.  */
 647   NT_ASSERTION     /* Predicate for #assert.  */
 648 };
 649
 650 /* Different flavors of builtin macro.  _Pragma is an operator, but we
 651    handle it with the builtin code for efficiency reasons.  */
 652 enum cpp_builtin_type
 653 {
 654   BT_SPECLINE = 0,              /* `__LINE__' */
 655   BT_DATE,                      /* `__DATE__' */
 656   BT_FILE,                      /* `__FILE__' */
 657   BT_BASE_FILE,                 /* `__BASE_FILE__' */
 658   BT_INCLUDE_LEVEL,             /* `__INCLUDE_LEVEL__' */
 659   BT_TIME,                      /* `__TIME__' */
 660   BT_STDC,                      /* `__STDC__' */
 661   BT_PRAGMA,                    /* `_Pragma' operator */
 662   BT_TIMESTAMP,                 /* `__TIMESTAMP__' */
 663   BT_COUNTER,                   /* `__COUNTER__' */
 664   BT_FIRST_USER,                /* User defined builtin macros.  */
 665   BT_LAST_USER = BT_FIRST_USER + 31
 666 };
 667
 668 #define CPP_HASHNODE(HNODE)     ((cpp_hashnode *) (HNODE))
 669 #define HT_NODE(NODE)           ((ht_identifier *) (NODE))
 670 #define NODE_LEN(NODE)          HT_LEN (&(NODE)->ident)
 671 #define NODE_NAME(NODE)         HT_STR (&(NODE)->ident)
 672
 673 /* Specify which field, if any, of the union is used.  */
 674
 675 enum {
 676   NTV_MACRO,
 677   NTV_ANSWER,
 678   NTV_BUILTIN,
 679   NTV_ARGUMENT,
 680   NTV_NONE
 681 };
 682
 683 #define CPP_HASHNODE_VALUE_IDX(HNODE)                           \
 684   ((HNODE.flags & NODE_MACRO_ARG) ? NTV_ARGUMENT                \
 685    : HNODE.type == NT_MACRO ? ((HNODE.flags & NODE_BUILTIN)     \
 686                                ? NTV_BUILTIN : NTV_MACRO)       \
 687    : HNODE.type == NT_ASSERTION ? NTV_ANSWER                    \
 688    : NTV_NONE)
 689
 690 /* The common part of an identifier node shared amongst all 3 C front
 691    ends.  Also used to store CPP identifiers, which are a superset of
 692    identifiers in the grammatical sense.  */
 693
 694 union GTY(()) _cpp_hashnode_value {
 695   /* If a macro.  */
 696   cpp_macro * GTY((tag ("NTV_MACRO"))) macro;
 697   /* Answers to an assertion.  */
 698   struct answer * GTY ((tag ("NTV_ANSWER"))) answers;
 699   /* Code for a builtin macro.  */
 700   enum cpp_builtin_type GTY ((tag ("NTV_BUILTIN"))) builtin;
 701   /* Macro argument index.  */
 702   unsigned short GTY ((tag ("NTV_ARGUMENT"))) arg_index;
 703 };
 704
 705 struct GTY(()) cpp_hashnode {
 706   struct ht_identifier ident;
 707   unsigned int is_directive : 1;
 708   unsigned int directive_index : 7;     /* If is_directive,
 709                                            then index into directive table.
 710                                            Otherwise, a NODE_OPERATOR.  */
 711   unsigned char rid_code;               /* Rid code - for front ends.  */
 712   ENUM_BITFIELD(node_type) type : 6;    /* CPP node type.  */
 713   unsigned int flags : 10;              /* CPP flags.  */
 714
 715   union _cpp_hashnode_value GTY ((desc ("CPP_HASHNODE_VALUE_IDX (%1)"))) value;
 716 };
 717
 718 /* Call this first to get a handle to pass to other functions.
 719
 720    If you want cpplib to manage its own hashtable, pass in a NULL
 721    pointer.  Otherwise you should pass in an initialized hash table
 722    that cpplib will share; this technique is used by the C front
 723    ends.  */
 724 extern cpp_reader *cpp_create_reader (enum c_lang, struct ht *,
 725                                       struct line_maps *);
 726
 727 /* Reset the cpp_reader's line_map.  This is only used after reading a
 728    PCH file.  */
 729 extern void cpp_set_line_map (cpp_reader *, struct line_maps *);
 730
 731 /* Call this to change the selected language standard (e.g. because of
 732    command line options).  */
 733 extern void cpp_set_lang (cpp_reader *, enum c_lang);
 734
 735 /* Set the include paths.  */
 736 extern void cpp_set_include_chains (cpp_reader *, cpp_dir *, cpp_dir *, int);
 737
 738 /* Call these to get pointers to the options, callback, and deps
 739    structures for a given reader.  These pointers are good until you
 740    call cpp_finish on that reader.  You can either edit the callbacks
 741    through the pointer returned from cpp_get_callbacks, or set them
 742    with cpp_set_callbacks.  */
 743 extern cpp_options *cpp_get_options (cpp_reader *);
 744 extern cpp_callbacks *cpp_get_callbacks (cpp_reader *);
 745 extern void cpp_set_callbacks (cpp_reader *, cpp_callbacks *);
 746 extern struct deps *cpp_get_deps (cpp_reader *);
 747
 748 /* This function reads the file, but does not start preprocessing.  It
 749    returns the name of the original file; this is the same as the
 750    input file, except for preprocessed input.  This will generate at
 751    least one file change callback, and possibly a line change callback
 752    too.  If there was an error opening the file, it returns NULL.  */
 753 extern const char *cpp_read_main_file (cpp_reader *, const char *);
 754
 755 /* Set up built-ins with special behavior.  Use cpp_init_builtins()
 756    instead unless your know what you are doing.  */
 757 extern void cpp_init_special_builtins (cpp_reader *);
 758
 759 /* Set up built-ins like __FILE__.  */
 760 extern void cpp_init_builtins (cpp_reader *, int);
 761
 762 /* This is called after options have been parsed, and partially
 763    processed.  */
 764 extern void cpp_post_options (cpp_reader *);
 765
 766 /* Set up translation to the target character set.  */
 767 extern void cpp_init_iconv (cpp_reader *);
 768
 769 /* Call this to finish preprocessing.  If you requested dependency
 770    generation, pass an open stream to write the information to,
 771    otherwise NULL.  It is your responsibility to close the stream.  */
 772 extern void cpp_finish (cpp_reader *, FILE *deps_stream);
 773
 774 /* Call this to release the handle at the end of preprocessing.  Any
 775    use of the handle after this function returns is invalid.  */
 776 extern void cpp_destroy (cpp_reader *);
 777
 778 extern unsigned int cpp_token_len (const cpp_token *);
 779 extern unsigned char *cpp_token_as_text (cpp_reader *, const cpp_token *);
 780 extern unsigned char *cpp_spell_token (cpp_reader *, const cpp_token *,
 781                                        unsigned char *, bool);
 782 extern void cpp_register_pragma (cpp_reader *, const char *, const char *,
 783                                  void (*) (cpp_reader *), bool);
 784 extern void cpp_register_deferred_pragma (cpp_reader *, const char *,
 785                                           const char *, unsigned, bool, bool);
 786 extern int cpp_avoid_paste (cpp_reader *, const cpp_token *,
 787                             const cpp_token *);
 788 extern const cpp_token *cpp_get_token (cpp_reader *);
 789 extern const cpp_token *cpp_get_token_with_location (cpp_reader *,
 790                                                      source_location *);
 791 extern const unsigned char *cpp_macro_definition (cpp_reader *,
 792                                                   cpp_hashnode *);
 793 extern void _cpp_backup_tokens (cpp_reader *, unsigned int);
 794 extern const cpp_token *cpp_peek_token (cpp_reader *, int);
 795
 796 /* Evaluate a CPP_*CHAR* token.  */
 797 extern cppchar_t cpp_interpret_charconst (cpp_reader *, const cpp_token *,
 798                                           unsigned int *, int *);
 799 /* Evaluate a vector of CPP_*STRING* tokens.  */
 800 extern bool cpp_interpret_string (cpp_reader *,
 801                                   const cpp_string *, size_t,
 802                                   cpp_string *, enum cpp_ttype);
 803 extern bool cpp_interpret_string_notranslate (cpp_reader *,
 804                                               const cpp_string *, size_t,
 805                                               cpp_string *, enum cpp_ttype);
 806
 807 /* Convert a host character constant to the execution character set.  */
 808 extern cppchar_t cpp_host_to_exec_charset (cpp_reader *, cppchar_t);
 809
 810 /* Used to register macros and assertions, perhaps from the command line.
 811    The text is the same as the command line argument.  */
 812 extern void cpp_define (cpp_reader *, const char *);
 813 extern void cpp_define_formatted (cpp_reader *pfile,
 814                                   const char *fmt, ...) ATTRIBUTE_PRINTF_2;
 815 extern void cpp_assert (cpp_reader *, const char *);
 816 extern void cpp_undef (cpp_reader *, const char *);
 817 extern void cpp_unassert (cpp_reader *, const char *);
 818
 819 /* Undefine all macros and assertions.  */
 820 extern void cpp_undef_all (cpp_reader *);
 821
 822 extern cpp_buffer *cpp_push_buffer (cpp_reader *, const unsigned char *,
 823                                     size_t, int);
 824 extern int cpp_defined (cpp_reader *, const unsigned char *, int);
 825
 826 /* A preprocessing number.  Code assumes that any unused high bits of
 827    the double integer are set to zero.  */
 828
 829 /* This type has to be equal to unsigned HOST_WIDE_INT, see
 830    gcc/c-family/c-lex.c.  */
 831 typedef uint64_t cpp_num_part;
 832 typedef struct cpp_num cpp_num;
 833 struct cpp_num
 834 {
 835   cpp_num_part high;
 836   cpp_num_part low;
 837   bool unsignedp;  /* True if value should be treated as unsigned.  */
 838   bool overflow;   /* True if the most recent calculation overflowed.  */
 839 };
 840
 841 /* cpplib provides two interfaces for interpretation of preprocessing
 842    numbers.
 843
 844    cpp_classify_number categorizes numeric constants according to
 845    their field (integer, floating point, or invalid), radix (decimal,
 846    octal, hexadecimal), and type suffixes.  */
 847
 848 #define CPP_N_CATEGORY  0x000F
 849 #define CPP_N_INVALID   0x0000
 850 #define CPP_N_INTEGER   0x0001
 851 #define CPP_N_FLOATING  0x0002
 852
 853 #define CPP_N_WIDTH     0x00F0
 854 #define CPP_N_SMALL     0x0010  /* int, float, shrot _Fract/Accum  */
 855 #define CPP_N_MEDIUM    0x0020  /* long, double, long _Fract/_Accum.  */
 856 #define CPP_N_LARGE     0x0040  /* long long, long double,
 857                                    long long _Fract/Accum.  */
 858
 859 #define CPP_N_WIDTH_MD  0xF0000 /* machine defined.  */
 860 #define CPP_N_MD_W      0x10000
 861 #define CPP_N_MD_Q      0x20000
 862
 863 #define CPP_N_RADIX     0x0F00
 864 #define CPP_N_DECIMAL   0x0100
 865 #define CPP_N_HEX       0x0200
 866 #define CPP_N_OCTAL     0x0400
 867 #define CPP_N_BINARY    0x0800
 868
 869 #define CPP_N_UNSIGNED  0x1000  /* Properties.  */
 870 #define CPP_N_IMAGINARY 0x2000
 871 #define CPP_N_DFLOAT    0x4000
 872 #define CPP_N_DEFAULT   0x8000
 873
 874 #define CPP_N_FRACT     0x100000 /* Fract types.  */
 875 #define CPP_N_ACCUM     0x200000 /* Accum types.  */
 876
 877 #define CPP_N_USERDEF   0x1000000 /* C++0x user-defined literal.  */
 878
 879 /* Classify a CPP_NUMBER token.  The return value is a combination of
 880    the flags from the above sets.  */
 881 extern unsigned cpp_classify_number (cpp_reader *, const cpp_token *,
 882                                      const char **, source_location);
 883
 884 /* Return the classification flags for a float suffix.  */
 885 extern unsigned int cpp_interpret_float_suffix (cpp_reader *, const char *,
 886                                                 size_t);
 887
 888 /* Return the classification flags for an int suffix.  */
 889 extern unsigned int cpp_interpret_int_suffix (cpp_reader *, const char *,
 890                                               size_t);
 891
 892 /* Evaluate a token classified as category CPP_N_INTEGER.  */
 893 extern cpp_num cpp_interpret_integer (cpp_reader *, const cpp_token *,
 894                                       unsigned int);
 895
 896 /* Sign extend a number, with PRECISION significant bits and all
 897    others assumed clear, to fill out a cpp_num structure.  */
 898 cpp_num cpp_num_sign_extend (cpp_num, size_t);
 899
 900 /* Diagnostic levels.  To get a diagnostic without associating a
 901    position in the translation unit with it, use cpp_error_with_line
 902    with a line number of zero.  */
 903
 904 enum {
 905   /* Warning, an error with -Werror.  */
 906   CPP_DL_WARNING = 0,
 907   /* Same as CPP_DL_WARNING, except it is not suppressed in system headers.  */
 908   CPP_DL_WARNING_SYSHDR,
 909   /* Warning, an error with -pedantic-errors or -Werror.  */
 910   CPP_DL_PEDWARN,
 911   /* An error.  */
 912   CPP_DL_ERROR,
 913   /* An internal consistency check failed.  Prints "internal error: ",
 914      otherwise the same as CPP_DL_ERROR.  */
 915   CPP_DL_ICE,
 916   /* An informative note following a warning.  */
 917   CPP_DL_NOTE,
 918   /* A fatal error.  */
 919   CPP_DL_FATAL
 920 };
 921
 922 /* Warning reason codes. Use a reason code of zero for unclassified warnings
 923    and errors that are not warnings.  */
 924 enum {
 925   CPP_W_NONE = 0,
 926   CPP_W_DEPRECATED,
 927   CPP_W_COMMENTS,
 928   CPP_W_MISSING_INCLUDE_DIRS,
 929   CPP_W_TRIGRAPHS,
 930   CPP_W_MULTICHAR,
 931   CPP_W_TRADITIONAL,
 932   CPP_W_LONG_LONG,
 933   CPP_W_ENDIF_LABELS,
 934   CPP_W_NUM_SIGN_CHANGE,
 935   CPP_W_VARIADIC_MACROS,
 936   CPP_W_BUILTIN_MACRO_REDEFINED,
 937   CPP_W_DOLLARS,
 938   CPP_W_UNDEF,
 939   CPP_W_UNUSED_MACROS,
 940   CPP_W_CXX_OPERATOR_NAMES,
 941   CPP_W_NORMALIZE,
 942   CPP_W_INVALID_PCH,
 943   CPP_W_WARNING_DIRECTIVE,
 944   CPP_W_LITERAL_SUFFIX,
 945   CPP_W_DATE_TIME,
 946   CPP_W_PEDANTIC,
 947   CPP_W_C90_C99_COMPAT
 948 };
 949
 950 /* Output a diagnostic of some kind.  */
 951 extern bool cpp_error (cpp_reader *, int, const char *msgid, ...)
 952   ATTRIBUTE_PRINTF_3;
 953 extern bool cpp_warning (cpp_reader *, int, const char *msgid, ...)
 954   ATTRIBUTE_PRINTF_3;
 955 extern bool cpp_pedwarning (cpp_reader *, int, const char *msgid, ...)
 956   ATTRIBUTE_PRINTF_3;
 957 extern bool cpp_warning_syshdr (cpp_reader *, int, const char *msgid, ...)
 958   ATTRIBUTE_PRINTF_3;
 959
 960 /* Output a diagnostic with "MSGID: " preceding the
 961    error string of errno.  No location is printed.  */
 962 extern bool cpp_errno (cpp_reader *, int, const char *msgid);
 963
 964 /* Same as cpp_error, except additionally specifies a position as a
 965    (translation unit) physical line and physical column.  If the line is
 966    zero, then no location is printed.  */
 967 extern bool cpp_error_with_line (cpp_reader *, int, source_location,
 968                                  unsigned, const char *msgid, ...)
 969   ATTRIBUTE_PRINTF_5;
 970 extern bool cpp_warning_with_line (cpp_reader *, int, source_location,
 971                                    unsigned, const char *msgid, ...)
 972   ATTRIBUTE_PRINTF_5;
 973 extern bool cpp_pedwarning_with_line (cpp_reader *, int, source_location,
 974                                       unsigned, const char *msgid, ...)
 975   ATTRIBUTE_PRINTF_5;
 976 extern bool cpp_warning_with_line_syshdr (cpp_reader *, int, source_location,
 977                                           unsigned, const char *msgid, ...)
 978   ATTRIBUTE_PRINTF_5;
 979
 980 /* In lex.c */
 981 extern int cpp_ideq (const cpp_token *, const char *);
 982 extern void cpp_output_line (cpp_reader *, FILE *);
 983 extern unsigned char *cpp_output_line_to_string (cpp_reader *,
 984                                                  const unsigned char *);
 985 extern void cpp_output_token (const cpp_token *, FILE *);
 986 extern const char *cpp_type2name (enum cpp_ttype, unsigned char flags);
 987 /* Returns the value of an escape sequence, truncated to the correct
 988    target precision.  PSTR points to the input pointer, which is just
 989    after the backslash.  LIMIT is how much text we have.  WIDE is true
 990    if the escape sequence is part of a wide character constant or
 991    string literal.  Handles all relevant diagnostics.  */
 992 extern cppchar_t cpp_parse_escape (cpp_reader *, const unsigned char ** pstr,
 993                                    const unsigned char *limit, int wide);
 994
 995 /* Structure used to hold a comment block at a given location in the
 996    source code.  */
 997
 998 typedef struct
 999 {
1000   /* Text of the comment including the terminators.  */
1001   char *comment;
1002
1003   /* source location for the given comment.  */
1004   source_location sloc;
1005 } cpp_comment;
1006
1007 /* Structure holding all comments for a given cpp_reader.  */
1008
1009 typedef struct
1010 {
1011   /* table of comment entries.  */
1012   cpp_comment *entries;
1013
1014   /* number of actual entries entered in the table.  */
1015   int count;
1016
1017   /* number of entries allocated currently.  */
1018   int allocated;
1019 } cpp_comment_table;
1020
1021 /* Returns the table of comments encountered by the preprocessor. This
1022    table is only populated when pfile->state.save_comments is true. */
1023 extern cpp_comment_table *cpp_get_comments (cpp_reader *);
1024
1025 /* In hash.c */
1026
1027 /* Lookup an identifier in the hashtable.  Puts the identifier in the
1028    table if it is not already there.  */
1029 extern cpp_hashnode *cpp_lookup (cpp_reader *, const unsigned char *,
1030                                  unsigned int);
1031
1032 typedef int (*cpp_cb) (cpp_reader *, cpp_hashnode *, void *);
1033 extern void cpp_forall_identifiers (cpp_reader *, cpp_cb, void *);
1034
1035 /* In macro.c */
1036 extern void cpp_scan_nooutput (cpp_reader *);
1037 extern int  cpp_sys_macro_p (cpp_reader *);
1038 extern unsigned char *cpp_quote_string (unsigned char *, const unsigned char *,
1039                                         unsigned int);
1040
1041 /* In files.c */
1042 extern bool cpp_included (cpp_reader *, const char *);
1043 extern bool cpp_included_before (cpp_reader *, const char *, source_location);
1044 extern void cpp_make_system_header (cpp_reader *, int, int);
1045 extern bool cpp_push_include (cpp_reader *, const char *);
1046 extern bool cpp_push_default_include (cpp_reader *, const char *);
1047 extern void cpp_change_file (cpp_reader *, enum lc_reason, const char *);
1048 extern const char *cpp_get_path (struct _cpp_file *);
1049 extern cpp_dir *cpp_get_dir (struct _cpp_file *);
1050 extern cpp_buffer *cpp_get_buffer (cpp_reader *);
1051 extern struct _cpp_file *cpp_get_file (cpp_buffer *);
1052 extern cpp_buffer *cpp_get_prev (cpp_buffer *);
1053 extern void cpp_clear_file_cache (cpp_reader *);
1054
1055 /* In pch.c */
1056 struct save_macro_data;
1057 extern int cpp_save_state (cpp_reader *, FILE *);
1058 extern int cpp_write_pch_deps (cpp_reader *, FILE *);
1059 extern int cpp_write_pch_state (cpp_reader *, FILE *);
1060 extern int cpp_valid_state (cpp_reader *, const char *, int);
1061 extern void cpp_prepare_state (cpp_reader *, struct save_macro_data **);
1062 extern int cpp_read_state (cpp_reader *, const char *, FILE *,
1063                            struct save_macro_data *);
1064
1065 /* In lex.c */
1066 extern void cpp_force_token_locations (cpp_reader *, source_location *);
1067 extern void cpp_stop_forcing_token_locations (cpp_reader *);
1068
1069 /* In expr.c */
1070 extern enum cpp_ttype cpp_userdef_string_remove_type
1071   (enum cpp_ttype type);
1072 extern enum cpp_ttype cpp_userdef_string_add_type
1073   (enum cpp_ttype type);
1074 extern enum cpp_ttype cpp_userdef_char_remove_type
1075   (enum cpp_ttype type);
1076 extern enum cpp_ttype cpp_userdef_char_add_type
1077   (enum cpp_ttype type);
1078 extern bool cpp_userdef_string_p
1079   (enum cpp_ttype type);
1080 extern bool cpp_userdef_char_p
1081   (enum cpp_ttype type);
1082 extern const char * cpp_get_userdef_suffix
1083   (const cpp_token *);
1084
1085 #endif /* ! LIBCPP_CPPLIB_H */