libcpp/include/cpplib.h

   1 /* Definitions for CPP library.
   2    Copyright (C) 1995-2013 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   /* Positions in the table.  */
 157   CPP_LAST_EQ        = CPP_LSHIFT,
 158   CPP_FIRST_DIGRAPH  = CPP_HASH,
 159   CPP_LAST_PUNCTUATOR= CPP_ATSIGN,
 160   CPP_LAST_CPP_OP    = CPP_LESS_EQ
 161 };
 162 #undef OP
 163 #undef TK
 164
 165 /* C language kind, used when calling cpp_create_reader.  */
 166 enum c_lang {CLK_GNUC89 = 0, CLK_GNUC99, CLK_GNUC11,
 167              CLK_STDC89, CLK_STDC94, CLK_STDC99, CLK_STDC11,
 168              CLK_GNUCXX, CLK_CXX98, CLK_GNUCXX11, CLK_CXX11,
 169              CLK_GNUCXX1Y, CLK_CXX1Y, CLK_ASM};
 170
 171 /* Payload of a NUMBER, STRING, CHAR or COMMENT token.  */
 172 struct GTY(()) cpp_string {
 173   unsigned int len;
 174   const unsigned char *text;
 175 };
 176
 177 /* Flags for the cpp_token structure.  */
 178 #define PREV_WHITE      (1 << 0) /* If whitespace before this token.  */
 179 #define DIGRAPH         (1 << 1) /* If it was a digraph.  */
 180 #define STRINGIFY_ARG   (1 << 2) /* If macro argument to be stringified.  */
 181 #define PASTE_LEFT      (1 << 3) /* If on LHS of a ## operator.  */
 182 #define NAMED_OP        (1 << 4) /* C++ named operators.  */
 183 #define NO_EXPAND       (1 << 5) /* Do not macro-expand this token.  */
 184 #define BOL             (1 << 6) /* Token at beginning of line.  */
 185 #define PURE_ZERO       (1 << 7) /* Single 0 digit, used by the C++ frontend,
 186                                     set in c-lex.c.  */
 187 #define SP_DIGRAPH      (1 << 8) /* # or ## token was a digraph.  */
 188 #define SP_PREV_WHITE   (1 << 9) /* If whitespace before a ##
 189                                     operator, or before this token
 190                                     after a # operator.  */
 191
 192 /* Specify which field, if any, of the cpp_token union is used.  */
 193
 194 enum cpp_token_fld_kind {
 195   CPP_TOKEN_FLD_NODE,
 196   CPP_TOKEN_FLD_SOURCE,
 197   CPP_TOKEN_FLD_STR,
 198   CPP_TOKEN_FLD_ARG_NO,
 199   CPP_TOKEN_FLD_TOKEN_NO,
 200   CPP_TOKEN_FLD_PRAGMA,
 201   CPP_TOKEN_FLD_NONE
 202 };
 203
 204 /* A macro argument in the cpp_token union.  */
 205 struct GTY(()) cpp_macro_arg {
 206   /* Argument number.  */
 207   unsigned int arg_no;
 208 };
 209
 210 /* An identifier in the cpp_token union.  */
 211 struct GTY(()) cpp_identifier {
 212   /* The canonical (UTF-8) spelling of the identifier.  */
 213   cpp_hashnode *
 214     GTY ((nested_ptr (union tree_node,
 215                 "%h ? CPP_HASHNODE (GCC_IDENT_TO_HT_IDENT (%h)) : NULL",
 216                         "%h ? HT_IDENT_TO_GCC_IDENT (HT_NODE (%h)) : NULL")))
 217        node;
 218 };
 219
 220 /* A preprocessing token.  This has been carefully packed and should
 221    occupy 16 bytes on 32-bit hosts and 24 bytes on 64-bit hosts.  */
 222 struct GTY(()) cpp_token {
 223   source_location src_loc;      /* Location of first char of token.  */
 224   ENUM_BITFIELD(cpp_ttype) type : CHAR_BIT;  /* token type */
 225   unsigned short flags;         /* flags - see above */
 226
 227   union cpp_token_u
 228   {
 229     /* An identifier.  */
 230     struct cpp_identifier GTY ((tag ("CPP_TOKEN_FLD_NODE"))) node;
 231
 232     /* Inherit padding from this token.  */
 233     cpp_token * GTY ((tag ("CPP_TOKEN_FLD_SOURCE"))) source;
 234
 235     /* A string, or number.  */
 236     struct cpp_string GTY ((tag ("CPP_TOKEN_FLD_STR"))) str;
 237
 238     /* Argument no. for a CPP_MACRO_ARG.  */
 239     struct cpp_macro_arg GTY ((tag ("CPP_TOKEN_FLD_ARG_NO"))) macro_arg;
 240
 241     /* Original token no. for a CPP_PASTE (from a sequence of
 242        consecutive paste tokens in a macro expansion).  */
 243     unsigned int GTY ((tag ("CPP_TOKEN_FLD_TOKEN_NO"))) token_no;
 244
 245     /* Caller-supplied identifier for a CPP_PRAGMA.  */
 246     unsigned int GTY ((tag ("CPP_TOKEN_FLD_PRAGMA"))) pragma;
 247   } GTY ((desc ("cpp_token_val_index (&%1)"))) val;
 248 };
 249
 250 /* Say which field is in use.  */
 251 extern enum cpp_token_fld_kind cpp_token_val_index (const cpp_token *tok);
 252
 253 /* A type wide enough to hold any multibyte source character.
 254    cpplib's character constant interpreter requires an unsigned type.
 255    Also, a typedef for the signed equivalent.
 256    The width of this type is capped at 32 bits; there do exist targets
 257    where wchar_t is 64 bits, but only in a non-default mode, and there
 258    would be no meaningful interpretation for a wchar_t value greater
 259    than 2^32 anyway -- the widest wide-character encoding around is
 260    ISO 10646, which stops at 2^31.  */
 261 #if CHAR_BIT * SIZEOF_INT >= 32
 262 # define CPPCHAR_SIGNED_T int
 263 #elif CHAR_BIT * SIZEOF_LONG >= 32
 264 # define CPPCHAR_SIGNED_T long
 265 #else
 266 # error "Cannot find a least-32-bit signed integer type"
 267 #endif
 268 typedef unsigned CPPCHAR_SIGNED_T cppchar_t;
 269 typedef CPPCHAR_SIGNED_T cppchar_signed_t;
 270
 271 /* Style of header dependencies to generate.  */
 272 enum cpp_deps_style { DEPS_NONE = 0, DEPS_USER, DEPS_SYSTEM };
 273
 274 /* The possible normalization levels, from most restrictive to least.  */
 275 enum cpp_normalize_level {
 276   /* In NFKC.  */
 277   normalized_KC = 0,
 278   /* In NFC.  */
 279   normalized_C,
 280   /* In NFC, except for subsequences where being in NFC would make
 281      the identifier invalid.  */
 282   normalized_identifier_C,
 283   /* Not normalized at all.  */
 284   normalized_none
 285 };
 286
 287 /* This structure is nested inside struct cpp_reader, and
 288    carries all the options visible to the command line.  */
 289 struct cpp_options
 290 {
 291   /* Characters between tab stops.  */
 292   unsigned int tabstop;
 293
 294   /* The language we're preprocessing.  */
 295   enum c_lang lang;
 296
 297   /* Nonzero means use extra default include directories for C++.  */
 298   unsigned char cplusplus;
 299
 300   /* Nonzero means handle cplusplus style comments.  */
 301   unsigned char cplusplus_comments;
 302
 303   /* Nonzero means define __OBJC__, treat @ as a special token, use
 304      the OBJC[PLUS]_INCLUDE_PATH environment variable, and allow
 305      "#import".  */
 306   unsigned char objc;
 307
 308   /* Nonzero means don't copy comments into the output file.  */
 309   unsigned char discard_comments;
 310
 311   /* Nonzero means don't copy comments into the output file during
 312      macro expansion.  */
 313   unsigned char discard_comments_in_macro_exp;
 314
 315   /* Nonzero means process the ISO trigraph sequences.  */
 316   unsigned char trigraphs;
 317
 318   /* Nonzero means process the ISO digraph sequences.  */
 319   unsigned char digraphs;
 320
 321   /* Nonzero means to allow hexadecimal floats and LL suffixes.  */
 322   unsigned char extended_numbers;
 323
 324   /* Nonzero means process u/U prefix literals (UTF-16/32).  */
 325   unsigned char uliterals;
 326
 327   /* Nonzero means process r/R raw strings.  If this is set, uliterals
 328      must be set as well.  */
 329   unsigned char rliterals;
 330
 331   /* Nonzero means print names of header files (-H).  */
 332   unsigned char print_include_names;
 333
 334   /* Nonzero means complain about deprecated features.  */
 335   unsigned char cpp_warn_deprecated;
 336
 337   /* Nonzero means warn if slash-star appears in a comment.  */
 338   unsigned char warn_comments;
 339
 340   /* Nonzero means to warn about __DATA__, __TIME__ and __TIMESTAMP__ usage.   */
 341   unsigned char warn_date_time;
 342
 343   /* Nonzero means warn if a user-supplied include directory does not
 344      exist.  */
 345   unsigned char warn_missing_include_dirs;
 346
 347   /* Nonzero means warn if there are any trigraphs.  */
 348   unsigned char warn_trigraphs;
 349
 350   /* Nonzero means warn about multicharacter charconsts.  */
 351   unsigned char warn_multichar;
 352
 353   /* Nonzero means warn about various incompatibilities with
 354      traditional C.  */
 355   unsigned char cpp_warn_traditional;
 356
 357   /* Nonzero means warn about long long numeric constants.  */
 358   unsigned char cpp_warn_long_long;
 359
 360   /* Nonzero means warn about text after an #endif (or #else).  */
 361   unsigned char warn_endif_labels;
 362
 363   /* Nonzero means warn about implicit sign changes owing to integer
 364      promotions.  */
 365   unsigned char warn_num_sign_change;
 366
 367   /* Zero means don't warn about __VA_ARGS__ usage in c89 pedantic mode.
 368      Presumably the usage is protected by the appropriate #ifdef.  */
 369   unsigned char warn_variadic_macros;
 370
 371   /* Nonzero means warn about builtin macros that are redefined or
 372      explicitly undefined.  */
 373   unsigned char warn_builtin_macro_redefined;
 374
 375   /* Nonzero means we should look for header.gcc files that remap file
 376      names.  */
 377   unsigned char remap;
 378
 379   /* Zero means dollar signs are punctuation.  */
 380   unsigned char dollars_in_ident;
 381
 382   /* Nonzero means UCNs are accepted in identifiers.  */
 383   unsigned char extended_identifiers;
 384
 385   /* True if we should warn about dollars in identifiers or numbers
 386      for this translation unit.  */
 387   unsigned char warn_dollars;
 388
 389   /* Nonzero means warn if undefined identifiers are evaluated in an #if.  */
 390   unsigned char warn_undef;
 391
 392   /* Nonzero means warn of unused macros from the main file.  */
 393   unsigned char warn_unused_macros;
 394
 395   /* Nonzero for the 1999 C Standard, including corrigenda and amendments.  */
 396   unsigned char c99;
 397
 398   /* Nonzero if we are conforming to a specific C or C++ standard.  */
 399   unsigned char std;
 400
 401   /* Nonzero means give all the error messages the ANSI standard requires.  */
 402   unsigned char cpp_pedantic;
 403
 404   /* Nonzero means we're looking at already preprocessed code, so don't
 405      bother trying to do macro expansion and whatnot.  */
 406   unsigned char preprocessed;
 407
 408   /* Nonzero means we are going to emit debugging logs during
 409      preprocessing.  */
 410   unsigned char debug;
 411
 412   /* Nonzero means we are tracking locations of tokens involved in
 413      macro expansion. 1 Means we track the location in degraded mode
 414      where we do not track locations of tokens resulting from the
 415      expansion of arguments of function-like macro.  2 Means we do
 416      track all macro expansions. This last option is the one that
 417      consumes the highest amount of memory.  */
 418   unsigned char track_macro_expansion;
 419
 420   /* Nonzero means handle C++ alternate operator names.  */
 421   unsigned char operator_names;
 422
 423   /* Nonzero means warn about use of C++ alternate operator names.  */
 424   unsigned char warn_cxx_operator_names;
 425
 426   /* True for traditional preprocessing.  */
 427   unsigned char traditional;
 428
 429   /* Nonzero for C++ 2011 Standard user-defined literals.  */
 430   unsigned char user_literals;
 431
 432   /* Nonzero means warn when a string or character literal is followed by a
 433      ud-suffix which does not beging with an underscore.  */
 434   unsigned char warn_literal_suffix;
 435
 436   /* Nonzero means interpret imaginary, fixed-point, or other gnu extension
 437      literal number suffixes as user-defined literal number suffixes.  */
 438   unsigned char ext_numeric_literals;
 439
 440   /* Nonzero means extended identifiers allow the characters specified
 441      in C11 and C++11.  */
 442   unsigned char c11_identifiers;
 443
 444   /* Nonzero for C++ 2014 Standard binary constants.  */
 445   unsigned char binary_constants;
 446
 447   /* Nonzero for C++ 2014 Standard digit separators.  */
 448   unsigned char digit_separators;
 449
 450   /* Holds the name of the target (execution) character set.  */
 451   const char *narrow_charset;
 452
 453   /* Holds the name of the target wide character set.  */
 454   const char *wide_charset;
 455
 456   /* Holds the name of the input character set.  */
 457   const char *input_charset;
 458
 459   /* The minimum permitted level of normalization before a warning
 460      is generated.  */
 461   enum cpp_normalize_level warn_normalize;
 462
 463   /* True to warn about precompiled header files we couldn't use.  */
 464   bool warn_invalid_pch;
 465
 466   /* True if dependencies should be restored from a precompiled header.  */
 467   bool restore_pch_deps;
 468
 469   /* Dependency generation.  */
 470   struct
 471   {
 472     /* Style of header dependencies to generate.  */
 473     enum cpp_deps_style style;
 474
 475     /* Assume missing files are generated files.  */
 476     bool missing_files;
 477
 478     /* Generate phony targets for each dependency apart from the first
 479        one.  */
 480     bool phony_targets;
 481
 482     /* If true, no dependency is generated on the main file.  */
 483     bool ignore_main_file;
 484
 485     /* If true, intend to use the preprocessor output (e.g., for compilation)
 486        in addition to the dependency info.  */
 487     bool need_preprocessor_output;
 488   } deps;
 489
 490   /* Target-specific features set by the front end or client.  */
 491
 492   /* Precision for target CPP arithmetic, target characters, target
 493      ints and target wide characters, respectively.  */
 494   size_t precision, char_precision, int_precision, wchar_precision;
 495
 496   /* True means chars (wide chars) are unsigned.  */
 497   bool unsigned_char, unsigned_wchar;
 498
 499   /* True if the most significant byte in a word has the lowest
 500      address in memory.  */
 501   bool bytes_big_endian;
 502
 503   /* Nonzero means __STDC__ should have the value 0 in system headers.  */
 504   unsigned char stdc_0_in_system_headers;
 505
 506   /* True disables tokenization outside of preprocessing directives. */
 507   bool directives_only;
 508
 509   /* True enables canonicalization of system header file paths. */
 510   bool canonical_system_headers;
 511 };
 512
 513 /* Callback for header lookup for HEADER, which is the name of a
 514    source file.  It is used as a method of last resort to find headers
 515    that are not otherwise found during the normal include processing.
 516    The return value is the malloced name of a header to try and open,
 517    if any, or NULL otherwise.  This callback is called only if the
 518    header is otherwise unfound.  */
 519 typedef const char *(*missing_header_cb)(cpp_reader *, const char *header, cpp_dir **);
 520
 521 /* Call backs to cpplib client.  */
 522 struct cpp_callbacks
 523 {
 524   /* Called when a new line of preprocessed output is started.  */
 525   void (*line_change) (cpp_reader *, const cpp_token *, int);
 526
 527   /* Called when switching to/from a new file.
 528      The line_map is for the new file.  It is NULL if there is no new file.
 529      (In C this happens when done with <built-in>+<command line> and also
 530      when done with a main file.)  This can be used for resource cleanup.  */
 531   void (*file_change) (cpp_reader *, const struct line_map *);
 532
 533   void (*dir_change) (cpp_reader *, const char *);
 534   void (*include) (cpp_reader *, source_location, const unsigned char *,
 535                    const char *, int, const cpp_token **);
 536   void (*define) (cpp_reader *, source_location, cpp_hashnode *);
 537   void (*undef) (cpp_reader *, source_location, cpp_hashnode *);
 538   void (*ident) (cpp_reader *, source_location, const cpp_string *);
 539   void (*def_pragma) (cpp_reader *, source_location);
 540   int (*valid_pch) (cpp_reader *, const char *, int);
 541   void (*read_pch) (cpp_reader *, const char *, int, const char *);
 542   missing_header_cb missing_header;
 543
 544   /* Context-sensitive macro support.  Returns macro (if any) that should
 545      be expanded.  */
 546   cpp_hashnode * (*macro_to_expand) (cpp_reader *, const cpp_token *);
 547
 548   /* Called to emit a diagnostic.  This callback receives the
 549      translated message.  */
 550   bool (*error) (cpp_reader *, int, int, source_location, unsigned int,
 551                  const char *, va_list *)
 552        ATTRIBUTE_FPTR_PRINTF(6,0);
 553
 554   /* Callbacks for when a macro is expanded, or tested (whether
 555      defined or not at the time) in #ifdef, #ifndef or "defined".  */
 556   void (*used_define) (cpp_reader *, source_location, cpp_hashnode *);
 557   void (*used_undef) (cpp_reader *, source_location, cpp_hashnode *);
 558   /* Called before #define and #undef or other macro definition
 559      changes are processed.  */
 560   void (*before_define) (cpp_reader *);
 561   /* Called whenever a macro is expanded or tested.
 562      Second argument is the location of the start of the current expansion.  */
 563   void (*used) (cpp_reader *, source_location, cpp_hashnode *);
 564
 565   /* Callback that can change a user builtin into normal macro.  */
 566   bool (*user_builtin_macro) (cpp_reader *, cpp_hashnode *);
 567 };
 568
 569 #ifdef VMS
 570 #define INO_T_CPP ino_t ino[3]
 571 #else
 572 #define INO_T_CPP ino_t ino
 573 #endif
 574
 575 /* Chain of directories to look for include files in.  */
 576 struct cpp_dir
 577 {
 578   /* NULL-terminated singly-linked list.  */
 579   struct cpp_dir *next;
 580
 581   /* NAME of the directory, NUL-terminated.  */
 582   char *name;
 583   unsigned int len;
 584
 585   /* One if a system header, two if a system header that has extern
 586      "C" guards for C++.  */
 587   unsigned char sysp;
 588
 589   /* Is this a user-supplied directory? */
 590   bool user_supplied_p;
 591
 592   /* The canonicalized NAME as determined by lrealpath.  This field
 593      is only used by hosts that lack reliable inode numbers.  */
 594   char *canonical_name;
 595
 596   /* Mapping of file names for this directory for MS-DOS and related
 597      platforms.  A NULL-terminated array of (from, to) pairs.  */
 598   const char **name_map;
 599
 600   /* Routine to construct pathname, given the search path name and the
 601      HEADER we are trying to find, return a constructed pathname to
 602      try and open.  If this is NULL, the constructed pathname is as
 603      constructed by append_file_to_dir.  */
 604   char *(*construct) (const char *header, cpp_dir *dir);
 605
 606   /* The C front end uses these to recognize duplicated
 607      directories in the search path.  */
 608   INO_T_CPP;
 609   dev_t dev;
 610 };
 611
 612 /* The structure of a node in the hash table.  The hash table has
 613    entries for all identifiers: either macros defined by #define
 614    commands (type NT_MACRO), assertions created with #assert
 615    (NT_ASSERTION), or neither of the above (NT_VOID).  Builtin macros
 616    like __LINE__ are flagged NODE_BUILTIN.  Poisoned identifiers are
 617    flagged NODE_POISONED.  NODE_OPERATOR (C++ only) indicates an
 618    identifier that behaves like an operator such as "xor".
 619    NODE_DIAGNOSTIC is for speed in lex_token: it indicates a
 620    diagnostic may be required for this node.  Currently this only
 621    applies to __VA_ARGS__, poisoned identifiers, and -Wc++-compat
 622    warnings about NODE_OPERATOR.  */
 623
 624 /* Hash node flags.  */
 625 #define NODE_OPERATOR   (1 << 0)        /* C++ named operator.  */
 626 #define NODE_POISONED   (1 << 1)        /* Poisoned identifier.  */
 627 #define NODE_BUILTIN    (1 << 2)        /* Builtin macro.  */
 628 #define NODE_DIAGNOSTIC (1 << 3)        /* Possible diagnostic when lexed.  */
 629 #define NODE_WARN       (1 << 4)        /* Warn if redefined or undefined.  */
 630 #define NODE_DISABLED   (1 << 5)        /* A disabled macro.  */
 631 #define NODE_MACRO_ARG  (1 << 6)        /* Used during #define processing.  */
 632 #define NODE_USED       (1 << 7)        /* Dumped with -dU.  */
 633 #define NODE_CONDITIONAL (1 << 8)       /* Conditional macro */
 634 #define NODE_WARN_OPERATOR (1 << 9)     /* Warn about C++ named operator.  */
 635
 636 /* Different flavors of hash node.  */
 637 enum node_type
 638 {
 639   NT_VOID = 0,     /* No definition yet.  */
 640   NT_MACRO,        /* A macro of some form.  */
 641   NT_ASSERTION     /* Predicate for #assert.  */
 642 };
 643
 644 /* Different flavors of builtin macro.  _Pragma is an operator, but we
 645    handle it with the builtin code for efficiency reasons.  */
 646 enum cpp_builtin_type
 647 {
 648   BT_SPECLINE = 0,              /* `__LINE__' */
 649   BT_DATE,                      /* `__DATE__' */
 650   BT_FILE,                      /* `__FILE__' */
 651   BT_BASE_FILE,                 /* `__BASE_FILE__' */
 652   BT_INCLUDE_LEVEL,             /* `__INCLUDE_LEVEL__' */
 653   BT_TIME,                      /* `__TIME__' */
 654   BT_STDC,                      /* `__STDC__' */
 655   BT_PRAGMA,                    /* `_Pragma' operator */
 656   BT_TIMESTAMP,                 /* `__TIMESTAMP__' */
 657   BT_COUNTER,                   /* `__COUNTER__' */
 658   BT_FIRST_USER,                /* User defined builtin macros.  */
 659   BT_LAST_USER = BT_FIRST_USER + 31
 660 };
 661
 662 #define CPP_HASHNODE(HNODE)     ((cpp_hashnode *) (HNODE))
 663 #define HT_NODE(NODE)           ((ht_identifier *) (NODE))
 664 #define NODE_LEN(NODE)          HT_LEN (&(NODE)->ident)
 665 #define NODE_NAME(NODE)         HT_STR (&(NODE)->ident)
 666
 667 /* Specify which field, if any, of the union is used.  */
 668
 669 enum {
 670   NTV_MACRO,
 671   NTV_ANSWER,
 672   NTV_BUILTIN,
 673   NTV_ARGUMENT,
 674   NTV_NONE
 675 };
 676
 677 #define CPP_HASHNODE_VALUE_IDX(HNODE)                           \
 678   ((HNODE.flags & NODE_MACRO_ARG) ? NTV_ARGUMENT                \
 679    : HNODE.type == NT_MACRO ? ((HNODE.flags & NODE_BUILTIN)     \
 680                                ? NTV_BUILTIN : NTV_MACRO)       \
 681    : HNODE.type == NT_ASSERTION ? NTV_ANSWER                    \
 682    : NTV_NONE)
 683
 684 /* The common part of an identifier node shared amongst all 3 C front
 685    ends.  Also used to store CPP identifiers, which are a superset of
 686    identifiers in the grammatical sense.  */
 687
 688 union GTY(()) _cpp_hashnode_value {
 689   /* If a macro.  */
 690   cpp_macro * GTY((tag ("NTV_MACRO"))) macro;
 691   /* Answers to an assertion.  */
 692   struct answer * GTY ((tag ("NTV_ANSWER"))) answers;
 693   /* Code for a builtin macro.  */
 694   enum cpp_builtin_type GTY ((tag ("NTV_BUILTIN"))) builtin;
 695   /* Macro argument index.  */
 696   unsigned short GTY ((tag ("NTV_ARGUMENT"))) arg_index;
 697 };
 698
 699 struct GTY(()) cpp_hashnode {
 700   struct ht_identifier ident;
 701   unsigned int is_directive : 1;
 702   unsigned int directive_index : 7;     /* If is_directive,
 703                                            then index into directive table.
 704                                            Otherwise, a NODE_OPERATOR.  */
 705   unsigned char rid_code;               /* Rid code - for front ends.  */
 706   ENUM_BITFIELD(node_type) type : 6;    /* CPP node type.  */
 707   unsigned int flags : 10;              /* CPP flags.  */
 708
 709   union _cpp_hashnode_value GTY ((desc ("CPP_HASHNODE_VALUE_IDX (%1)"))) value;
 710 };
 711
 712 /* Call this first to get a handle to pass to other functions.
 713
 714    If you want cpplib to manage its own hashtable, pass in a NULL
 715    pointer.  Otherwise you should pass in an initialized hash table
 716    that cpplib will share; this technique is used by the C front
 717    ends.  */
 718 extern cpp_reader *cpp_create_reader (enum c_lang, struct ht *,
 719                                       struct line_maps *);
 720
 721 /* Reset the cpp_reader's line_map.  This is only used after reading a
 722    PCH file.  */
 723 extern void cpp_set_line_map (cpp_reader *, struct line_maps *);
 724
 725 /* Call this to change the selected language standard (e.g. because of
 726    command line options).  */
 727 extern void cpp_set_lang (cpp_reader *, enum c_lang);
 728
 729 /* Set the include paths.  */
 730 extern void cpp_set_include_chains (cpp_reader *, cpp_dir *, cpp_dir *, int);
 731
 732 /* Call these to get pointers to the options, callback, and deps
 733    structures for a given reader.  These pointers are good until you
 734    call cpp_finish on that reader.  You can either edit the callbacks
 735    through the pointer returned from cpp_get_callbacks, or set them
 736    with cpp_set_callbacks.  */
 737 extern cpp_options *cpp_get_options (cpp_reader *);
 738 extern cpp_callbacks *cpp_get_callbacks (cpp_reader *);
 739 extern void cpp_set_callbacks (cpp_reader *, cpp_callbacks *);
 740 extern struct deps *cpp_get_deps (cpp_reader *);
 741
 742 /* This function reads the file, but does not start preprocessing.  It
 743    returns the name of the original file; this is the same as the
 744    input file, except for preprocessed input.  This will generate at
 745    least one file change callback, and possibly a line change callback
 746    too.  If there was an error opening the file, it returns NULL.  */
 747 extern const char *cpp_read_main_file (cpp_reader *, const char *);
 748
 749 /* Set up built-ins with special behavior.  Use cpp_init_builtins()
 750    instead unless your know what you are doing.  */
 751 extern void cpp_init_special_builtins (cpp_reader *);
 752
 753 /* Set up built-ins like __FILE__.  */
 754 extern void cpp_init_builtins (cpp_reader *, int);
 755
 756 /* This is called after options have been parsed, and partially
 757    processed.  */
 758 extern void cpp_post_options (cpp_reader *);
 759
 760 /* Set up translation to the target character set.  */
 761 extern void cpp_init_iconv (cpp_reader *);
 762
 763 /* Call this to finish preprocessing.  If you requested dependency
 764    generation, pass an open stream to write the information to,
 765    otherwise NULL.  It is your responsibility to close the stream.  */
 766 extern void cpp_finish (cpp_reader *, FILE *deps_stream);
 767
 768 /* Call this to release the handle at the end of preprocessing.  Any
 769    use of the handle after this function returns is invalid.  */
 770 extern void cpp_destroy (cpp_reader *);
 771
 772 extern unsigned int cpp_token_len (const cpp_token *);
 773 extern unsigned char *cpp_token_as_text (cpp_reader *, const cpp_token *);
 774 extern unsigned char *cpp_spell_token (cpp_reader *, const cpp_token *,
 775                                        unsigned char *, bool);
 776 extern void cpp_register_pragma (cpp_reader *, const char *, const char *,
 777                                  void (*) (cpp_reader *), bool);
 778 extern void cpp_register_deferred_pragma (cpp_reader *, const char *,
 779                                           const char *, unsigned, bool, bool);
 780 extern int cpp_avoid_paste (cpp_reader *, const cpp_token *,
 781                             const cpp_token *);
 782 extern const cpp_token *cpp_get_token (cpp_reader *);
 783 extern const cpp_token *cpp_get_token_with_location (cpp_reader *,
 784                                                      source_location *);
 785 extern const unsigned char *cpp_macro_definition (cpp_reader *,
 786                                                   cpp_hashnode *);
 787 extern void _cpp_backup_tokens (cpp_reader *, unsigned int);
 788 extern const cpp_token *cpp_peek_token (cpp_reader *, int);
 789
 790 /* Evaluate a CPP_*CHAR* token.  */
 791 extern cppchar_t cpp_interpret_charconst (cpp_reader *, const cpp_token *,
 792                                           unsigned int *, int *);
 793 /* Evaluate a vector of CPP_*STRING* tokens.  */
 794 extern bool cpp_interpret_string (cpp_reader *,
 795                                   const cpp_string *, size_t,
 796                                   cpp_string *, enum cpp_ttype);
 797 extern bool cpp_interpret_string_notranslate (cpp_reader *,
 798                                               const cpp_string *, size_t,
 799                                               cpp_string *, enum cpp_ttype);
 800
 801 /* Convert a host character constant to the execution character set.  */
 802 extern cppchar_t cpp_host_to_exec_charset (cpp_reader *, cppchar_t);
 803
 804 /* Used to register macros and assertions, perhaps from the command line.
 805    The text is the same as the command line argument.  */
 806 extern void cpp_define (cpp_reader *, const char *);
 807 extern void cpp_define_formatted (cpp_reader *pfile,
 808                                   const char *fmt, ...) ATTRIBUTE_PRINTF_2;
 809 extern void cpp_assert (cpp_reader *, const char *);
 810 extern void cpp_undef (cpp_reader *, const char *);
 811 extern void cpp_unassert (cpp_reader *, const char *);
 812
 813 /* Undefine all macros and assertions.  */
 814 extern void cpp_undef_all (cpp_reader *);
 815
 816 extern cpp_buffer *cpp_push_buffer (cpp_reader *, const unsigned char *,
 817                                     size_t, int);
 818 extern int cpp_defined (cpp_reader *, const unsigned char *, int);
 819
 820 /* A preprocessing number.  Code assumes that any unused high bits of
 821    the double integer are set to zero.  */
 822 typedef unsigned HOST_WIDE_INT cpp_num_part;
 823 typedef struct cpp_num cpp_num;
 824 struct cpp_num
 825 {
 826   cpp_num_part high;
 827   cpp_num_part low;
 828   bool unsignedp;  /* True if value should be treated as unsigned.  */
 829   bool overflow;   /* True if the most recent calculation overflowed.  */
 830 };
 831
 832 /* cpplib provides two interfaces for interpretation of preprocessing
 833    numbers.
 834
 835    cpp_classify_number categorizes numeric constants according to
 836    their field (integer, floating point, or invalid), radix (decimal,
 837    octal, hexadecimal), and type suffixes.  */
 838
 839 #define CPP_N_CATEGORY  0x000F
 840 #define CPP_N_INVALID   0x0000
 841 #define CPP_N_INTEGER   0x0001
 842 #define CPP_N_FLOATING  0x0002
 843
 844 #define CPP_N_WIDTH     0x00F0
 845 #define CPP_N_SMALL     0x0010  /* int, float, shrot _Fract/Accum  */
 846 #define CPP_N_MEDIUM    0x0020  /* long, double, long _Fract/_Accum.  */
 847 #define CPP_N_LARGE     0x0040  /* long long, long double,
 848                                    long long _Fract/Accum.  */
 849
 850 #define CPP_N_WIDTH_MD  0xF0000 /* machine defined.  */
 851 #define CPP_N_MD_W      0x10000
 852 #define CPP_N_MD_Q      0x20000
 853
 854 #define CPP_N_RADIX     0x0F00
 855 #define CPP_N_DECIMAL   0x0100
 856 #define CPP_N_HEX       0x0200
 857 #define CPP_N_OCTAL     0x0400
 858 #define CPP_N_BINARY    0x0800
 859
 860 #define CPP_N_UNSIGNED  0x1000  /* Properties.  */
 861 #define CPP_N_IMAGINARY 0x2000
 862 #define CPP_N_DFLOAT    0x4000
 863 #define CPP_N_DEFAULT   0x8000
 864
 865 #define CPP_N_FRACT     0x100000 /* Fract types.  */
 866 #define CPP_N_ACCUM     0x200000 /* Accum types.  */
 867
 868 #define CPP_N_USERDEF   0x1000000 /* C++0x user-defined literal.  */
 869
 870 /* Classify a CPP_NUMBER token.  The return value is a combination of
 871    the flags from the above sets.  */
 872 extern unsigned cpp_classify_number (cpp_reader *, const cpp_token *,
 873                                      const char **, source_location);
 874
 875 /* Return the classification flags for a float suffix.  */
 876 extern unsigned int cpp_interpret_float_suffix (cpp_reader *, const char *,
 877                                                 size_t);
 878
 879 /* Return the classification flags for an int suffix.  */
 880 extern unsigned int cpp_interpret_int_suffix (cpp_reader *, const char *,
 881                                               size_t);
 882
 883 /* Evaluate a token classified as category CPP_N_INTEGER.  */
 884 extern cpp_num cpp_interpret_integer (cpp_reader *, const cpp_token *,
 885                                       unsigned int);
 886
 887 /* Sign extend a number, with PRECISION significant bits and all
 888    others assumed clear, to fill out a cpp_num structure.  */
 889 cpp_num cpp_num_sign_extend (cpp_num, size_t);
 890
 891 /* Diagnostic levels.  To get a diagnostic without associating a
 892    position in the translation unit with it, use cpp_error_with_line
 893    with a line number of zero.  */
 894
 895 enum {
 896   /* Warning, an error with -Werror.  */
 897   CPP_DL_WARNING = 0,
 898   /* Same as CPP_DL_WARNING, except it is not suppressed in system headers.  */
 899   CPP_DL_WARNING_SYSHDR,
 900   /* Warning, an error with -pedantic-errors or -Werror.  */
 901   CPP_DL_PEDWARN,
 902   /* An error.  */
 903   CPP_DL_ERROR,
 904   /* An internal consistency check failed.  Prints "internal error: ",
 905      otherwise the same as CPP_DL_ERROR.  */
 906   CPP_DL_ICE,
 907   /* An informative note following a warning.  */
 908   CPP_DL_NOTE,
 909   /* A fatal error.  */
 910   CPP_DL_FATAL
 911 };
 912
 913 /* Warning reason codes. Use a reason code of zero for unclassified warnings
 914    and errors that are not warnings.  */
 915 enum {
 916   CPP_W_NONE = 0,
 917   CPP_W_DEPRECATED,
 918   CPP_W_COMMENTS,
 919   CPP_W_MISSING_INCLUDE_DIRS,
 920   CPP_W_TRIGRAPHS,
 921   CPP_W_MULTICHAR,
 922   CPP_W_TRADITIONAL,
 923   CPP_W_LONG_LONG,
 924   CPP_W_ENDIF_LABELS,
 925   CPP_W_NUM_SIGN_CHANGE,
 926   CPP_W_VARIADIC_MACROS,
 927   CPP_W_BUILTIN_MACRO_REDEFINED,
 928   CPP_W_DOLLARS,
 929   CPP_W_UNDEF,
 930   CPP_W_UNUSED_MACROS,
 931   CPP_W_CXX_OPERATOR_NAMES,
 932   CPP_W_NORMALIZE,
 933   CPP_W_INVALID_PCH,
 934   CPP_W_WARNING_DIRECTIVE,
 935   CPP_W_LITERAL_SUFFIX,
 936   CPP_W_DATE_TIME
 937 };
 938
 939 /* Output a diagnostic of some kind.  */
 940 extern bool cpp_error (cpp_reader *, int, const char *msgid, ...)
 941   ATTRIBUTE_PRINTF_3;
 942 extern bool cpp_warning (cpp_reader *, int, const char *msgid, ...)
 943   ATTRIBUTE_PRINTF_3;
 944 extern bool cpp_pedwarning (cpp_reader *, int, const char *msgid, ...)
 945   ATTRIBUTE_PRINTF_3;
 946 extern bool cpp_warning_syshdr (cpp_reader *, int, const char *msgid, ...)
 947   ATTRIBUTE_PRINTF_3;
 948
 949 /* Output a diagnostic with "MSGID: " preceding the
 950    error string of errno.  No location is printed.  */
 951 extern bool cpp_errno (cpp_reader *, int, const char *msgid);
 952
 953 /* Same as cpp_error, except additionally specifies a position as a
 954    (translation unit) physical line and physical column.  If the line is
 955    zero, then no location is printed.  */
 956 extern bool cpp_error_with_line (cpp_reader *, int, source_location,
 957                                  unsigned, const char *msgid, ...)
 958   ATTRIBUTE_PRINTF_5;
 959 extern bool cpp_warning_with_line (cpp_reader *, int, source_location,
 960                                    unsigned, const char *msgid, ...)
 961   ATTRIBUTE_PRINTF_5;
 962 extern bool cpp_pedwarning_with_line (cpp_reader *, int, source_location,
 963                                       unsigned, const char *msgid, ...)
 964   ATTRIBUTE_PRINTF_5;
 965 extern bool cpp_warning_with_line_syshdr (cpp_reader *, int, source_location,
 966                                           unsigned, const char *msgid, ...)
 967   ATTRIBUTE_PRINTF_5;
 968
 969 /* In lex.c */
 970 extern int cpp_ideq (const cpp_token *, const char *);
 971 extern void cpp_output_line (cpp_reader *, FILE *);
 972 extern unsigned char *cpp_output_line_to_string (cpp_reader *,
 973                                                  const unsigned char *);
 974 extern void cpp_output_token (const cpp_token *, FILE *);
 975 extern const char *cpp_type2name (enum cpp_ttype, unsigned char flags);
 976 /* Returns the value of an escape sequence, truncated to the correct
 977    target precision.  PSTR points to the input pointer, which is just
 978    after the backslash.  LIMIT is how much text we have.  WIDE is true
 979    if the escape sequence is part of a wide character constant or
 980    string literal.  Handles all relevant diagnostics.  */
 981 extern cppchar_t cpp_parse_escape (cpp_reader *, const unsigned char ** pstr,
 982                                    const unsigned char *limit, int wide);
 983
 984 /* Structure used to hold a comment block at a given location in the
 985    source code.  */
 986
 987 typedef struct
 988 {
 989   /* Text of the comment including the terminators.  */
 990   char *comment;
 991
 992   /* source location for the given comment.  */
 993   source_location sloc;
 994 } cpp_comment;
 995
 996 /* Structure holding all comments for a given cpp_reader.  */
 997
 998 typedef struct
 999 {
1000   /* table of comment entries.  */
1001   cpp_comment *entries;
1002
1003   /* number of actual entries entered in the table.  */
1004   int count;
1005
1006   /* number of entries allocated currently.  */
1007   int allocated;
1008 } cpp_comment_table;
1009
1010 /* Returns the table of comments encountered by the preprocessor. This
1011    table is only populated when pfile->state.save_comments is true. */
1012 extern cpp_comment_table *cpp_get_comments (cpp_reader *);
1013
1014 /* In hash.c */
1015
1016 /* Lookup an identifier in the hashtable.  Puts the identifier in the
1017    table if it is not already there.  */
1018 extern cpp_hashnode *cpp_lookup (cpp_reader *, const unsigned char *,
1019                                  unsigned int);
1020
1021 typedef int (*cpp_cb) (cpp_reader *, cpp_hashnode *, void *);
1022 extern void cpp_forall_identifiers (cpp_reader *, cpp_cb, void *);
1023
1024 /* In macro.c */
1025 extern void cpp_scan_nooutput (cpp_reader *);
1026 extern int  cpp_sys_macro_p (cpp_reader *);
1027 extern unsigned char *cpp_quote_string (unsigned char *, const unsigned char *,
1028                                         unsigned int);
1029
1030 /* In files.c */
1031 extern bool cpp_included (cpp_reader *, const char *);
1032 extern bool cpp_included_before (cpp_reader *, const char *, source_location);
1033 extern void cpp_make_system_header (cpp_reader *, int, int);
1034 extern bool cpp_push_include (cpp_reader *, const char *);
1035 extern bool cpp_push_default_include (cpp_reader *, const char *);
1036 extern void cpp_change_file (cpp_reader *, enum lc_reason, const char *);
1037 extern const char *cpp_get_path (struct _cpp_file *);
1038 extern cpp_dir *cpp_get_dir (struct _cpp_file *);
1039 extern cpp_buffer *cpp_get_buffer (cpp_reader *);
1040 extern struct _cpp_file *cpp_get_file (cpp_buffer *);
1041 extern cpp_buffer *cpp_get_prev (cpp_buffer *);
1042 extern void cpp_clear_file_cache (cpp_reader *);
1043
1044 /* In pch.c */
1045 struct save_macro_data;
1046 extern int cpp_save_state (cpp_reader *, FILE *);
1047 extern int cpp_write_pch_deps (cpp_reader *, FILE *);
1048 extern int cpp_write_pch_state (cpp_reader *, FILE *);
1049 extern int cpp_valid_state (cpp_reader *, const char *, int);
1050 extern void cpp_prepare_state (cpp_reader *, struct save_macro_data **);
1051 extern int cpp_read_state (cpp_reader *, const char *, FILE *,
1052                            struct save_macro_data *);
1053
1054 /* In lex.c */
1055 extern void cpp_force_token_locations (cpp_reader *, source_location *);
1056 extern void cpp_stop_forcing_token_locations (cpp_reader *);
1057
1058 /* In expr.c */
1059 extern enum cpp_ttype cpp_userdef_string_remove_type
1060   (enum cpp_ttype type);
1061 extern enum cpp_ttype cpp_userdef_string_add_type
1062   (enum cpp_ttype type);
1063 extern enum cpp_ttype cpp_userdef_char_remove_type
1064   (enum cpp_ttype type);
1065 extern enum cpp_ttype cpp_userdef_char_add_type
1066   (enum cpp_ttype type);
1067 extern bool cpp_userdef_string_p
1068   (enum cpp_ttype type);
1069 extern bool cpp_userdef_char_p
1070   (enum cpp_ttype type);
1071 extern const char * cpp_get_userdef_suffix
1072   (const cpp_token *);
1073
1074 #endif /* ! LIBCPP_CPPLIB_H */