libcpp/include/cpplib.h

   1 /* Definitions for CPP library.
   2    Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
   3    2004, 2005, 2007, 2008, 2009, 2010, 2011, 2012
   4    Free Software Foundation, Inc.
   5    Written by Per Bothner, 1994-95.
   6
   7 This program is free software; you can redistribute it and/or modify it
   8 under the terms of the GNU General Public License as published by the
   9 Free Software Foundation; either version 3, or (at your option) any
  10 later version.
  11
  12 This program is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with this program; see the file COPYING3.  If not see
  19 <http://www.gnu.org/licenses/>.
  20
  21  In other words, you are welcome to use, share and improve this program.
  22  You are forbidden to forbid anyone else to use, share and improve
  23  what you give them.   Help stamp out software-hoarding!  */
  24 #ifndef LIBCPP_CPPLIB_H
  25 #define LIBCPP_CPPLIB_H
  26
  27 #include <sys/types.h>
  28 #include "symtab.h"
  29 #include "line-map.h"
  30
  31 typedef struct cpp_reader cpp_reader;
  32 typedef struct cpp_buffer cpp_buffer;
  33 typedef struct cpp_options cpp_options;
  34 typedef struct cpp_token cpp_token;
  35 typedef struct cpp_string cpp_string;
  36 typedef struct cpp_hashnode cpp_hashnode;
  37 typedef struct cpp_macro cpp_macro;
  38 typedef struct cpp_callbacks cpp_callbacks;
  39 typedef struct cpp_dir cpp_dir;
  40
  41 struct answer;
  42 struct _cpp_file;
  43
  44 /* The first three groups, apart from '=', can appear in preprocessor
  45    expressions (+= and -= are used to indicate unary + and - resp.).
  46    This allows a lookup table to be implemented in _cpp_parse_expr.
  47
  48    The first group, to CPP_LAST_EQ, can be immediately followed by an
  49    '='.  The lexer needs operators ending in '=', like ">>=", to be in
  50    the same order as their counterparts without the '=', like ">>".
  51
  52    See the cpp_operator table optab in expr.c if you change the order or
  53    add or remove anything in the first group.  */
  54
  55 #define TTYPE_TABLE                                                     \
  56   OP(EQ,                "=")                                            \
  57   OP(NOT,               "!")                                            \
  58   OP(GREATER,           ">")    /* compare */                           \
  59   OP(LESS,              "<")                                            \
  60   OP(PLUS,              "+")    /* math */                              \
  61   OP(MINUS,             "-")                                            \
  62   OP(MULT,              "*")                                            \
  63   OP(DIV,               "/")                                            \
  64   OP(MOD,               "%")                                            \
  65   OP(AND,               "&")    /* bit ops */                           \
  66   OP(OR,                "|")                                            \
  67   OP(XOR,               "^")                                            \
  68   OP(RSHIFT,            ">>")                                           \
  69   OP(LSHIFT,            "<<")                                           \
  70                                                                         \
  71   OP(COMPL,             "~")                                            \
  72   OP(AND_AND,           "&&")   /* logical */                           \
  73   OP(OR_OR,             "||")                                           \
  74   OP(QUERY,             "?")                                            \
  75   OP(COLON,             ":")                                            \
  76   OP(COMMA,             ",")    /* grouping */                          \
  77   OP(OPEN_PAREN,        "(")                                            \
  78   OP(CLOSE_PAREN,       ")")                                            \
  79   TK(EOF,               NONE)                                           \
  80   OP(EQ_EQ,             "==")   /* compare */                           \
  81   OP(NOT_EQ,            "!=")                                           \
  82   OP(GREATER_EQ,        ">=")                                           \
  83   OP(LESS_EQ,           "<=")                                           \
  84                                                                         \
  85   /* These two are unary + / - in preprocessor expressions.  */         \
  86   OP(PLUS_EQ,           "+=")   /* math */                              \
  87   OP(MINUS_EQ,          "-=")                                           \
  88                                                                         \
  89   OP(MULT_EQ,           "*=")                                           \
  90   OP(DIV_EQ,            "/=")                                           \
  91   OP(MOD_EQ,            "%=")                                           \
  92   OP(AND_EQ,            "&=")   /* bit ops */                           \
  93   OP(OR_EQ,             "|=")                                           \
  94   OP(XOR_EQ,            "^=")                                           \
  95   OP(RSHIFT_EQ,         ">>=")                                          \
  96   OP(LSHIFT_EQ,         "<<=")                                          \
  97   /* Digraphs together, beginning with CPP_FIRST_DIGRAPH.  */           \
  98   OP(HASH,              "#")    /* digraphs */                          \
  99   OP(PASTE,             "##")                                           \
 100   OP(OPEN_SQUARE,       "[")                                            \
 101   OP(CLOSE_SQUARE,      "]")                                            \
 102   OP(OPEN_BRACE,        "{")                                            \
 103   OP(CLOSE_BRACE,       "}")                                            \
 104   /* The remainder of the punctuation.  Order is not significant.  */   \
 105   OP(SEMICOLON,         ";")    /* structure */                         \
 106   OP(ELLIPSIS,          "...")                                          \
 107   OP(PLUS_PLUS,         "++")   /* increment */                         \
 108   OP(MINUS_MINUS,       "--")                                           \
 109   OP(DEREF,             "->")   /* accessors */                         \
 110   OP(DOT,               ".")                                            \
 111   OP(SCOPE,             "::")                                           \
 112   OP(DEREF_STAR,        "->*")                                          \
 113   OP(DOT_STAR,          ".*")                                           \
 114   OP(ATSIGN,            "@")  /* used in Objective-C */                 \
 115                                                                         \
 116   TK(NAME,              IDENT)   /* word */                             \
 117   TK(AT_NAME,           IDENT)   /* @word - Objective-C */              \
 118   TK(NUMBER,            LITERAL) /* 34_be+ta  */                        \
 119                                                                         \
 120   TK(CHAR,              LITERAL) /* 'char' */                           \
 121   TK(WCHAR,             LITERAL) /* L'char' */                          \
 122   TK(CHAR16,            LITERAL) /* u'char' */                          \
 123   TK(CHAR32,            LITERAL) /* U'char' */                          \
 124   TK(OTHER,             LITERAL) /* stray punctuation */                \
 125                                                                         \
 126   TK(STRING,            LITERAL) /* "string" */                         \
 127   TK(WSTRING,           LITERAL) /* L"string" */                        \
 128   TK(STRING16,          LITERAL) /* u"string" */                        \
 129   TK(STRING32,          LITERAL) /* U"string" */                        \
 130   TK(UTF8STRING,        LITERAL) /* u8"string" */                       \
 131   TK(OBJC_STRING,       LITERAL) /* @"string" - Objective-C */          \
 132   TK(HEADER_NAME,       LITERAL) /* <stdio.h> in #include */            \
 133                                                                         \
 134   TK(CHAR_USERDEF,      LITERAL) /* 'char'_suffix - C++-0x */           \
 135   TK(WCHAR_USERDEF,     LITERAL) /* L'char'_suffix - C++-0x */          \
 136   TK(CHAR16_USERDEF,    LITERAL) /* u'char'_suffix - C++-0x */          \
 137   TK(CHAR32_USERDEF,    LITERAL) /* U'char'_suffix - C++-0x */          \
 138   TK(STRING_USERDEF,    LITERAL) /* "string"_suffix - C++-0x */         \
 139   TK(WSTRING_USERDEF,   LITERAL) /* L"string"_suffix - C++-0x */        \
 140   TK(STRING16_USERDEF,  LITERAL) /* u"string"_suffix - C++-0x */        \
 141   TK(STRING32_USERDEF,  LITERAL) /* U"string"_suffix - C++-0x */        \
 142   TK(UTF8STRING_USERDEF,LITERAL) /* u8"string"_suffix - C++-0x */       \
 143                                                                         \
 144   TK(COMMENT,           LITERAL) /* Only if output comments.  */        \
 145                                  /* SPELL_LITERAL happens to DTRT.  */  \
 146   TK(MACRO_ARG,         NONE)    /* Macro argument.  */                 \
 147   TK(PRAGMA,            NONE)    /* Only for deferred pragmas.  */      \
 148   TK(PRAGMA_EOL,        NONE)    /* End-of-line for deferred pragmas.  */ \
 149   TK(PADDING,           NONE)    /* Whitespace for -E.  */
 150
 151 #define OP(e, s) CPP_ ## e,
 152 #define TK(e, s) CPP_ ## e,
 153 enum cpp_ttype
 154 {
 155   TTYPE_TABLE
 156   N_TTYPES,
 157
 158   /* Positions in the table.  */
 159   CPP_LAST_EQ        = CPP_LSHIFT,
 160   CPP_FIRST_DIGRAPH  = CPP_HASH,
 161   CPP_LAST_PUNCTUATOR= CPP_ATSIGN,
 162   CPP_LAST_CPP_OP    = CPP_LESS_EQ
 163 };
 164 #undef OP
 165 #undef TK
 166
 167 /* C language kind, used when calling cpp_create_reader.  */
 168 enum c_lang {CLK_GNUC89 = 0, CLK_GNUC99, CLK_GNUC11,
 169              CLK_STDC89, CLK_STDC94, CLK_STDC99, CLK_STDC11,
 170              CLK_GNUCXX, CLK_CXX98, CLK_GNUCXX11, CLK_CXX11, CLK_ASM};
 171
 172 /* Payload of a NUMBER, STRING, CHAR or COMMENT token.  */
 173 struct GTY(()) cpp_string {
 174   unsigned int len;
 175   const unsigned char *text;
 176 };
 177
 178 /* Flags for the cpp_token structure.  */
 179 #define PREV_WHITE      (1 << 0) /* If whitespace before this token.  */
 180 #define DIGRAPH         (1 << 1) /* If it was a digraph.  */
 181 #define STRINGIFY_ARG   (1 << 2) /* If macro argument to be stringified.  */
 182 #define PASTE_LEFT      (1 << 3) /* If on LHS of a ## operator.  */
 183 #define NAMED_OP        (1 << 4) /* C++ named operators.  */
 184 #define NO_EXPAND       (1 << 5) /* Do not macro-expand this token.  */
 185 #define BOL             (1 << 6) /* Token at beginning of line.  */
 186 #define PURE_ZERO       (1 << 7) /* Single 0 digit, used by the C++ frontend,
 187                                     set in c-lex.c.  */
 188 #define SP_DIGRAPH      (1 << 8) /* # or ## token was a digraph.  */
 189 #define SP_PREV_WHITE   (1 << 9) /* If whitespace before a ##
 190                                     operator, or before this token
 191                                     after a # operator.  */
 192
 193 /* Specify which field, if any, of the cpp_token union is used.  */
 194
 195 enum cpp_token_fld_kind {
 196   CPP_TOKEN_FLD_NODE,
 197   CPP_TOKEN_FLD_SOURCE,
 198   CPP_TOKEN_FLD_STR,
 199   CPP_TOKEN_FLD_ARG_NO,
 200   CPP_TOKEN_FLD_TOKEN_NO,
 201   CPP_TOKEN_FLD_PRAGMA,
 202   CPP_TOKEN_FLD_NONE
 203 };
 204
 205 /* A macro argument in the cpp_token union.  */
 206 struct GTY(()) cpp_macro_arg {
 207   /* Argument number.  */
 208   unsigned int arg_no;
 209 };
 210
 211 /* An identifier in the cpp_token union.  */
 212 struct GTY(()) cpp_identifier {
 213   /* The canonical (UTF-8) spelling of the identifier.  */
 214   cpp_hashnode *
 215     GTY ((nested_ptr (union tree_node,
 216                 "%h ? CPP_HASHNODE (GCC_IDENT_TO_HT_IDENT (%h)) : NULL",
 217                         "%h ? HT_IDENT_TO_GCC_IDENT (HT_NODE (%h)) : NULL")))
 218        node;
 219 };
 220
 221 /* A preprocessing token.  This has been carefully packed and should
 222    occupy 16 bytes on 32-bit hosts and 24 bytes on 64-bit hosts.  */
 223 struct GTY(()) cpp_token {
 224   source_location src_loc;      /* Location of first char of token.  */
 225   ENUM_BITFIELD(cpp_ttype) type : CHAR_BIT;  /* token type */
 226   unsigned short flags;         /* flags - see above */
 227
 228   union cpp_token_u
 229   {
 230     /* An identifier.  */
 231     struct cpp_identifier GTY ((tag ("CPP_TOKEN_FLD_NODE"))) node;
 232
 233     /* Inherit padding from this token.  */
 234     cpp_token * GTY ((tag ("CPP_TOKEN_FLD_SOURCE"))) source;
 235
 236     /* A string, or number.  */
 237     struct cpp_string GTY ((tag ("CPP_TOKEN_FLD_STR"))) str;
 238
 239     /* Argument no. for a CPP_MACRO_ARG.  */
 240     struct cpp_macro_arg GTY ((tag ("CPP_TOKEN_FLD_ARG_NO"))) macro_arg;
 241
 242     /* Original token no. for a CPP_PASTE (from a sequence of
 243        consecutive paste tokens in a macro expansion).  */
 244     unsigned int GTY ((tag ("CPP_TOKEN_FLD_TOKEN_NO"))) token_no;
 245
 246     /* Caller-supplied identifier for a CPP_PRAGMA.  */
 247     unsigned int GTY ((tag ("CPP_TOKEN_FLD_PRAGMA"))) pragma;
 248   } GTY ((desc ("cpp_token_val_index (&%1)"))) val;
 249 };
 250
 251 /* Say which field is in use.  */
 252 extern enum cpp_token_fld_kind cpp_token_val_index (cpp_token *tok);
 253
 254 /* A type wide enough to hold any multibyte source character.
 255    cpplib's character constant interpreter requires an unsigned type.
 256    Also, a typedef for the signed equivalent.
 257    The width of this type is capped at 32 bits; there do exist targets
 258    where wchar_t is 64 bits, but only in a non-default mode, and there
 259    would be no meaningful interpretation for a wchar_t value greater
 260    than 2^32 anyway -- the widest wide-character encoding around is
 261    ISO 10646, which stops at 2^31.  */
 262 #if CHAR_BIT * SIZEOF_INT >= 32
 263 # define CPPCHAR_SIGNED_T int
 264 #elif CHAR_BIT * SIZEOF_LONG >= 32
 265 # define CPPCHAR_SIGNED_T long
 266 #else
 267 # error "Cannot find a least-32-bit signed integer type"
 268 #endif
 269 typedef unsigned CPPCHAR_SIGNED_T cppchar_t;
 270 typedef CPPCHAR_SIGNED_T cppchar_signed_t;
 271
 272 /* Style of header dependencies to generate.  */
 273 enum cpp_deps_style { DEPS_NONE = 0, DEPS_USER, DEPS_SYSTEM };
 274
 275 /* The possible normalization levels, from most restrictive to least.  */
 276 enum cpp_normalize_level {
 277   /* In NFKC.  */
 278   normalized_KC = 0,
 279   /* In NFC.  */
 280   normalized_C,
 281   /* In NFC, except for subsequences where being in NFC would make
 282      the identifier invalid.  */
 283   normalized_identifier_C,
 284   /* Not normalized at all.  */
 285   normalized_none
 286 };
 287
 288 /* This structure is nested inside struct cpp_reader, and
 289    carries all the options visible to the command line.  */
 290 struct cpp_options
 291 {
 292   /* Characters between tab stops.  */
 293   unsigned int tabstop;
 294
 295   /* The language we're preprocessing.  */
 296   enum c_lang lang;
 297
 298   /* Nonzero means use extra default include directories for C++.  */
 299   unsigned char cplusplus;
 300
 301   /* Nonzero means handle cplusplus style comments.  */
 302   unsigned char cplusplus_comments;
 303
 304   /* Nonzero means define __OBJC__, treat @ as a special token, use
 305      the OBJC[PLUS]_INCLUDE_PATH environment variable, and allow
 306      "#import".  */
 307   unsigned char objc;
 308
 309   /* Nonzero means don't copy comments into the output file.  */
 310   unsigned char discard_comments;
 311
 312   /* Nonzero means don't copy comments into the output file during
 313      macro expansion.  */
 314   unsigned char discard_comments_in_macro_exp;
 315
 316   /* Nonzero means process the ISO trigraph sequences.  */
 317   unsigned char trigraphs;
 318
 319   /* Nonzero means process the ISO digraph sequences.  */
 320   unsigned char digraphs;
 321
 322   /* Nonzero means to allow hexadecimal floats and LL suffixes.  */
 323   unsigned char extended_numbers;
 324
 325   /* Nonzero means process u/U prefix literals (UTF-16/32).  */
 326   unsigned char uliterals;
 327
 328   /* Nonzero means process r/R raw strings.  If this is set, uliterals
 329      must be set as well.  */
 330   unsigned char rliterals;
 331
 332   /* Nonzero means print names of header files (-H).  */
 333   unsigned char print_include_names;
 334
 335   /* Nonzero means complain about deprecated features.  */
 336   unsigned char cpp_warn_deprecated;
 337
 338   /* Nonzero means warn if slash-star appears in a comment.  */
 339   unsigned char warn_comments;
 340
 341   /* Nonzero means warn if a user-supplied include directory does not
 342      exist.  */
 343   unsigned char warn_missing_include_dirs;
 344
 345   /* Nonzero means warn if there are any trigraphs.  */
 346   unsigned char warn_trigraphs;
 347
 348   /* Nonzero means warn about multicharacter charconsts.  */
 349   unsigned char warn_multichar;
 350
 351   /* Nonzero means warn about various incompatibilities with
 352      traditional C.  */
 353   unsigned char cpp_warn_traditional;
 354
 355   /* Nonzero means warn about long long numeric constants.  */
 356   unsigned char cpp_warn_long_long;
 357
 358   /* Nonzero means warn about text after an #endif (or #else).  */
 359   unsigned char warn_endif_labels;
 360
 361   /* Nonzero means warn about implicit sign changes owing to integer
 362      promotions.  */
 363   unsigned char warn_num_sign_change;
 364
 365   /* Zero means don't warn about __VA_ARGS__ usage in c89 pedantic mode.
 366      Presumably the usage is protected by the appropriate #ifdef.  */
 367   unsigned char warn_variadic_macros;
 368
 369   /* Nonzero means warn about builtin macros that are redefined or
 370      explicitly undefined.  */
 371   unsigned char warn_builtin_macro_redefined;
 372
 373   /* Nonzero means we should look for header.gcc files that remap file
 374      names.  */
 375   unsigned char remap;
 376
 377   /* Zero means dollar signs are punctuation.  */
 378   unsigned char dollars_in_ident;
 379
 380   /* Nonzero means UCNs are accepted in identifiers.  */
 381   unsigned char extended_identifiers;
 382
 383   /* True if we should warn about dollars in identifiers or numbers
 384      for this translation unit.  */
 385   unsigned char warn_dollars;
 386
 387   /* Nonzero means warn if undefined identifiers are evaluated in an #if.  */
 388   unsigned char warn_undef;
 389
 390   /* Nonzero means warn of unused macros from the main file.  */
 391   unsigned char warn_unused_macros;
 392
 393   /* Nonzero for the 1999 C Standard, including corrigenda and amendments.  */
 394   unsigned char c99;
 395
 396   /* Nonzero if we are conforming to a specific C or C++ standard.  */
 397   unsigned char std;
 398
 399   /* Nonzero means give all the error messages the ANSI standard requires.  */
 400   unsigned char cpp_pedantic;
 401
 402   /* Nonzero means we're looking at already preprocessed code, so don't
 403      bother trying to do macro expansion and whatnot.  */
 404   unsigned char preprocessed;
 405
 406   /* Nonzero means we are going to emit debugging logs during
 407      preprocessing.  */
 408   unsigned char debug;
 409
 410   /* Nonzero means we are tracking locations of tokens involved in
 411      macro expansion. 1 Means we track the location in degraded mode
 412      where we do not track locations of tokens resulting from the
 413      expansion of arguments of function-like macro.  2 Means we do
 414      track all macro expansions. This last option is the one that
 415      consumes the highest amount of memory.  */
 416   unsigned char track_macro_expansion;
 417
 418   /* Nonzero means handle C++ alternate operator names.  */
 419   unsigned char operator_names;
 420
 421   /* Nonzero means warn about use of C++ alternate operator names.  */
 422   unsigned char warn_cxx_operator_names;
 423
 424   /* True for traditional preprocessing.  */
 425   unsigned char traditional;
 426
 427   /* Nonzero for C++ 2011 Standard user-defnied literals.  */
 428   unsigned char user_literals;
 429
 430   /* Nonzero means warn when a string or character literal is followed by a
 431      ud-suffix which does not beging with an underscore.  */
 432   unsigned char warn_literal_suffix;
 433
 434   /* Nonzero means interpret imaginary, fixed-point, or other gnu extension
 435      literal number suffixes as user-defined literal number suffixes.  */
 436   unsigned char ext_numeric_literals;
 437
 438   /* Holds the name of the target (execution) character set.  */
 439   const char *narrow_charset;
 440
 441   /* Holds the name of the target wide character set.  */
 442   const char *wide_charset;
 443
 444   /* Holds the name of the input character set.  */
 445   const char *input_charset;
 446
 447   /* The minimum permitted level of normalization before a warning
 448      is generated.  */
 449   enum cpp_normalize_level warn_normalize;
 450
 451   /* True to warn about precompiled header files we couldn't use.  */
 452   bool warn_invalid_pch;
 453
 454   /* True if dependencies should be restored from a precompiled header.  */
 455   bool restore_pch_deps;
 456
 457   /* Dependency generation.  */
 458   struct
 459   {
 460     /* Style of header dependencies to generate.  */
 461     enum cpp_deps_style style;
 462
 463     /* Assume missing files are generated files.  */
 464     bool missing_files;
 465
 466     /* Generate phony targets for each dependency apart from the first
 467        one.  */
 468     bool phony_targets;
 469
 470     /* If true, no dependency is generated on the main file.  */
 471     bool ignore_main_file;
 472
 473     /* If true, intend to use the preprocessor output (e.g., for compilation)
 474        in addition to the dependency info.  */
 475     bool need_preprocessor_output;
 476   } deps;
 477
 478   /* Target-specific features set by the front end or client.  */
 479
 480   /* Precision for target CPP arithmetic, target characters, target
 481      ints and target wide characters, respectively.  */
 482   size_t precision, char_precision, int_precision, wchar_precision;
 483
 484   /* True means chars (wide chars) are unsigned.  */
 485   bool unsigned_char, unsigned_wchar;
 486
 487   /* True if the most significant byte in a word has the lowest
 488      address in memory.  */
 489   bool bytes_big_endian;
 490
 491   /* Nonzero means __STDC__ should have the value 0 in system headers.  */
 492   unsigned char stdc_0_in_system_headers;
 493
 494   /* True disables tokenization outside of preprocessing directives. */
 495   bool directives_only;
 496
 497   /* True enables canonicalization of system header file paths. */
 498   bool canonical_system_headers;
 499 };
 500
 501 /* Callback for header lookup for HEADER, which is the name of a
 502    source file.  It is used as a method of last resort to find headers
 503    that are not otherwise found during the normal include processing.
 504    The return value is the malloced name of a header to try and open,
 505    if any, or NULL otherwise.  This callback is called only if the
 506    header is otherwise unfound.  */
 507 typedef const char *(*missing_header_cb)(cpp_reader *, const char *header, cpp_dir **);
 508
 509 /* Call backs to cpplib client.  */
 510 struct cpp_callbacks
 511 {
 512   /* Called when a new line of preprocessed output is started.  */
 513   void (*line_change) (cpp_reader *, const cpp_token *, int);
 514
 515   /* Called when switching to/from a new file.
 516      The line_map is for the new file.  It is NULL if there is no new file.
 517      (In C this happens when done with <built-in>+<command line> and also
 518      when done with a main file.)  This can be used for resource cleanup.  */
 519   void (*file_change) (cpp_reader *, const struct line_map *);
 520
 521   void (*dir_change) (cpp_reader *, const char *);
 522   void (*include) (cpp_reader *, source_location, const unsigned char *,
 523                    const char *, int, const cpp_token **);
 524   void (*define) (cpp_reader *, source_location, cpp_hashnode *);
 525   void (*undef) (cpp_reader *, source_location, cpp_hashnode *);
 526   void (*ident) (cpp_reader *, source_location, const cpp_string *);
 527   void (*def_pragma) (cpp_reader *, source_location);
 528   int (*valid_pch) (cpp_reader *, const char *, int);
 529   void (*read_pch) (cpp_reader *, const char *, int, const char *);
 530   missing_header_cb missing_header;
 531
 532   /* Context-sensitive macro support.  Returns macro (if any) that should
 533      be expanded.  */
 534   cpp_hashnode * (*macro_to_expand) (cpp_reader *, const cpp_token *);
 535
 536   /* Called to emit a diagnostic.  This callback receives the
 537      translated message.  */
 538   bool (*error) (cpp_reader *, int, int, source_location, unsigned int,
 539                  const char *, va_list *)
 540        ATTRIBUTE_FPTR_PRINTF(6,0);
 541
 542   /* Callbacks for when a macro is expanded, or tested (whether
 543      defined or not at the time) in #ifdef, #ifndef or "defined".  */
 544   void (*used_define) (cpp_reader *, source_location, cpp_hashnode *);
 545   void (*used_undef) (cpp_reader *, source_location, cpp_hashnode *);
 546   /* Called before #define and #undef or other macro definition
 547      changes are processed.  */
 548   void (*before_define) (cpp_reader *);
 549   /* Called whenever a macro is expanded or tested.
 550      Second argument is the location of the start of the current expansion.  */
 551   void (*used) (cpp_reader *, source_location, cpp_hashnode *);
 552
 553   /* Callback that can change a user builtin into normal macro.  */
 554   bool (*user_builtin_macro) (cpp_reader *, cpp_hashnode *);
 555 };
 556
 557 #ifdef VMS
 558 #define INO_T_CPP ino_t ino[3]
 559 #else
 560 #define INO_T_CPP ino_t ino
 561 #endif
 562
 563 /* Chain of directories to look for include files in.  */
 564 struct cpp_dir
 565 {
 566   /* NULL-terminated singly-linked list.  */
 567   struct cpp_dir *next;
 568
 569   /* NAME of the directory, NUL-terminated.  */
 570   char *name;
 571   unsigned int len;
 572
 573   /* One if a system header, two if a system header that has extern
 574      "C" guards for C++.  */
 575   unsigned char sysp;
 576
 577   /* Is this a user-supplied directory? */
 578   bool user_supplied_p;
 579
 580   /* The canonicalized NAME as determined by lrealpath.  This field
 581      is only used by hosts that lack reliable inode numbers.  */
 582   char *canonical_name;
 583
 584   /* Mapping of file names for this directory for MS-DOS and related
 585      platforms.  A NULL-terminated array of (from, to) pairs.  */
 586   const char **name_map;
 587
 588   /* Routine to construct pathname, given the search path name and the
 589      HEADER we are trying to find, return a constructed pathname to
 590      try and open.  If this is NULL, the constructed pathname is as
 591      constructed by append_file_to_dir.  */
 592   char *(*construct) (const char *header, cpp_dir *dir);
 593
 594   /* The C front end uses these to recognize duplicated
 595      directories in the search path.  */
 596   INO_T_CPP;
 597   dev_t dev;
 598 };
 599
 600 /* The structure of a node in the hash table.  The hash table has
 601    entries for all identifiers: either macros defined by #define
 602    commands (type NT_MACRO), assertions created with #assert
 603    (NT_ASSERTION), or neither of the above (NT_VOID).  Builtin macros
 604    like __LINE__ are flagged NODE_BUILTIN.  Poisoned identifiers are
 605    flagged NODE_POISONED.  NODE_OPERATOR (C++ only) indicates an
 606    identifier that behaves like an operator such as "xor".
 607    NODE_DIAGNOSTIC is for speed in lex_token: it indicates a
 608    diagnostic may be required for this node.  Currently this only
 609    applies to __VA_ARGS__, poisoned identifiers, and -Wc++-compat
 610    warnings about NODE_OPERATOR.  */
 611
 612 /* Hash node flags.  */
 613 #define NODE_OPERATOR   (1 << 0)        /* C++ named operator.  */
 614 #define NODE_POISONED   (1 << 1)        /* Poisoned identifier.  */
 615 #define NODE_BUILTIN    (1 << 2)        /* Builtin macro.  */
 616 #define NODE_DIAGNOSTIC (1 << 3)        /* Possible diagnostic when lexed.  */
 617 #define NODE_WARN       (1 << 4)        /* Warn if redefined or undefined.  */
 618 #define NODE_DISABLED   (1 << 5)        /* A disabled macro.  */
 619 #define NODE_MACRO_ARG  (1 << 6)        /* Used during #define processing.  */
 620 #define NODE_USED       (1 << 7)        /* Dumped with -dU.  */
 621 #define NODE_CONDITIONAL (1 << 8)       /* Conditional macro */
 622 #define NODE_WARN_OPERATOR (1 << 9)     /* Warn about C++ named operator.  */
 623
 624 /* Different flavors of hash node.  */
 625 enum node_type
 626 {
 627   NT_VOID = 0,     /* No definition yet.  */
 628   NT_MACRO,        /* A macro of some form.  */
 629   NT_ASSERTION     /* Predicate for #assert.  */
 630 };
 631
 632 /* Different flavors of builtin macro.  _Pragma is an operator, but we
 633    handle it with the builtin code for efficiency reasons.  */
 634 enum cpp_builtin_type
 635 {
 636   BT_SPECLINE = 0,              /* `__LINE__' */
 637   BT_DATE,                      /* `__DATE__' */
 638   BT_FILE,                      /* `__FILE__' */
 639   BT_BASE_FILE,                 /* `__BASE_FILE__' */
 640   BT_INCLUDE_LEVEL,             /* `__INCLUDE_LEVEL__' */
 641   BT_TIME,                      /* `__TIME__' */
 642   BT_STDC,                      /* `__STDC__' */
 643   BT_PRAGMA,                    /* `_Pragma' operator */
 644   BT_TIMESTAMP,                 /* `__TIMESTAMP__' */
 645   BT_COUNTER,                   /* `__COUNTER__' */
 646   BT_FIRST_USER,                /* User defined builtin macros.  */
 647   BT_LAST_USER = BT_FIRST_USER + 31
 648 };
 649
 650 #define CPP_HASHNODE(HNODE)     ((cpp_hashnode *) (HNODE))
 651 #define HT_NODE(NODE)           ((ht_identifier *) (NODE))
 652 #define NODE_LEN(NODE)          HT_LEN (&(NODE)->ident)
 653 #define NODE_NAME(NODE)         HT_STR (&(NODE)->ident)
 654
 655 /* Specify which field, if any, of the union is used.  */
 656
 657 enum {
 658   NTV_MACRO,
 659   NTV_ANSWER,
 660   NTV_BUILTIN,
 661   NTV_ARGUMENT,
 662   NTV_NONE
 663 };
 664
 665 #define CPP_HASHNODE_VALUE_IDX(HNODE)                           \
 666   ((HNODE.flags & NODE_MACRO_ARG) ? NTV_ARGUMENT                \
 667    : HNODE.type == NT_MACRO ? ((HNODE.flags & NODE_BUILTIN)     \
 668                                ? NTV_BUILTIN : NTV_MACRO)       \
 669    : HNODE.type == NT_ASSERTION ? NTV_ANSWER                    \
 670    : NTV_NONE)
 671
 672 /* The common part of an identifier node shared amongst all 3 C front
 673    ends.  Also used to store CPP identifiers, which are a superset of
 674    identifiers in the grammatical sense.  */
 675
 676 union GTY(()) _cpp_hashnode_value {
 677   /* If a macro.  */
 678   cpp_macro * GTY((tag ("NTV_MACRO"))) macro;
 679   /* Answers to an assertion.  */
 680   struct answer * GTY ((tag ("NTV_ANSWER"))) answers;
 681   /* Code for a builtin macro.  */
 682   enum cpp_builtin_type GTY ((tag ("NTV_BUILTIN"))) builtin;
 683   /* Macro argument index.  */
 684   unsigned short GTY ((tag ("NTV_ARGUMENT"))) arg_index;
 685 };
 686
 687 struct GTY(()) cpp_hashnode {
 688   struct ht_identifier ident;
 689   unsigned int is_directive : 1;
 690   unsigned int directive_index : 7;     /* If is_directive,
 691                                            then index into directive table.
 692                                            Otherwise, a NODE_OPERATOR.  */
 693   unsigned char rid_code;               /* Rid code - for front ends.  */
 694   ENUM_BITFIELD(node_type) type : 6;    /* CPP node type.  */
 695   unsigned int flags : 10;              /* CPP flags.  */
 696
 697   union _cpp_hashnode_value GTY ((desc ("CPP_HASHNODE_VALUE_IDX (%1)"))) value;
 698 };
 699
 700 /* Call this first to get a handle to pass to other functions.
 701
 702    If you want cpplib to manage its own hashtable, pass in a NULL
 703    pointer.  Otherwise you should pass in an initialized hash table
 704    that cpplib will share; this technique is used by the C front
 705    ends.  */
 706 extern cpp_reader *cpp_create_reader (enum c_lang, struct ht *,
 707                                       struct line_maps *);
 708
 709 /* Reset the cpp_reader's line_map.  This is only used after reading a
 710    PCH file.  */
 711 extern void cpp_set_line_map (cpp_reader *, struct line_maps *);
 712
 713 /* Call this to change the selected language standard (e.g. because of
 714    command line options).  */
 715 extern void cpp_set_lang (cpp_reader *, enum c_lang);
 716
 717 /* Set the include paths.  */
 718 extern void cpp_set_include_chains (cpp_reader *, cpp_dir *, cpp_dir *, int);
 719
 720 /* Call these to get pointers to the options, callback, and deps
 721    structures for a given reader.  These pointers are good until you
 722    call cpp_finish on that reader.  You can either edit the callbacks
 723    through the pointer returned from cpp_get_callbacks, or set them
 724    with cpp_set_callbacks.  */
 725 extern cpp_options *cpp_get_options (cpp_reader *);
 726 extern cpp_callbacks *cpp_get_callbacks (cpp_reader *);
 727 extern void cpp_set_callbacks (cpp_reader *, cpp_callbacks *);
 728 extern struct deps *cpp_get_deps (cpp_reader *);
 729
 730 /* This function reads the file, but does not start preprocessing.  It
 731    returns the name of the original file; this is the same as the
 732    input file, except for preprocessed input.  This will generate at
 733    least one file change callback, and possibly a line change callback
 734    too.  If there was an error opening the file, it returns NULL.  */
 735 extern const char *cpp_read_main_file (cpp_reader *, const char *);
 736
 737 /* Set up built-ins with special behavior.  Use cpp_init_builtins()
 738    instead unless your know what you are doing.  */
 739 extern void cpp_init_special_builtins (cpp_reader *);
 740
 741 /* Set up built-ins like __FILE__.  */
 742 extern void cpp_init_builtins (cpp_reader *, int);
 743
 744 /* This is called after options have been parsed, and partially
 745    processed.  */
 746 extern void cpp_post_options (cpp_reader *);
 747
 748 /* Set up translation to the target character set.  */
 749 extern void cpp_init_iconv (cpp_reader *);
 750
 751 /* Call this to finish preprocessing.  If you requested dependency
 752    generation, pass an open stream to write the information to,
 753    otherwise NULL.  It is your responsibility to close the stream.  */
 754 extern void cpp_finish (cpp_reader *, FILE *deps_stream);
 755
 756 /* Call this to release the handle at the end of preprocessing.  Any
 757    use of the handle after this function returns is invalid.  */
 758 extern void cpp_destroy (cpp_reader *);
 759
 760 extern unsigned int cpp_token_len (const cpp_token *);
 761 extern unsigned char *cpp_token_as_text (cpp_reader *, const cpp_token *);
 762 extern unsigned char *cpp_spell_token (cpp_reader *, const cpp_token *,
 763                                        unsigned char *, bool);
 764 extern void cpp_register_pragma (cpp_reader *, const char *, const char *,
 765                                  void (*) (cpp_reader *), bool);
 766 extern void cpp_register_deferred_pragma (cpp_reader *, const char *,
 767                                           const char *, unsigned, bool, bool);
 768 extern int cpp_avoid_paste (cpp_reader *, const cpp_token *,
 769                             const cpp_token *);
 770 extern const cpp_token *cpp_get_token (cpp_reader *);
 771 extern const cpp_token *cpp_get_token_with_location (cpp_reader *,
 772                                                      source_location *);
 773 extern const unsigned char *cpp_macro_definition (cpp_reader *,
 774                                                   cpp_hashnode *);
 775 extern void _cpp_backup_tokens (cpp_reader *, unsigned int);
 776 extern const cpp_token *cpp_peek_token (cpp_reader *, int);
 777
 778 /* Evaluate a CPP_*CHAR* token.  */
 779 extern cppchar_t cpp_interpret_charconst (cpp_reader *, const cpp_token *,
 780                                           unsigned int *, int *);
 781 /* Evaluate a vector of CPP_*STRING* tokens.  */
 782 extern bool cpp_interpret_string (cpp_reader *,
 783                                   const cpp_string *, size_t,
 784                                   cpp_string *, enum cpp_ttype);
 785 extern bool cpp_interpret_string_notranslate (cpp_reader *,
 786                                               const cpp_string *, size_t,
 787                                               cpp_string *, enum cpp_ttype);
 788
 789 /* Convert a host character constant to the execution character set.  */
 790 extern cppchar_t cpp_host_to_exec_charset (cpp_reader *, cppchar_t);
 791
 792 /* Used to register macros and assertions, perhaps from the command line.
 793    The text is the same as the command line argument.  */
 794 extern void cpp_define (cpp_reader *, const char *);
 795 extern void cpp_define_formatted (cpp_reader *pfile,
 796                                   const char *fmt, ...) ATTRIBUTE_PRINTF_2;
 797 extern void cpp_assert (cpp_reader *, const char *);
 798 extern void cpp_undef (cpp_reader *, const char *);
 799 extern void cpp_unassert (cpp_reader *, const char *);
 800
 801 /* Undefine all macros and assertions.  */
 802 extern void cpp_undef_all (cpp_reader *);
 803
 804 extern cpp_buffer *cpp_push_buffer (cpp_reader *, const unsigned char *,
 805                                     size_t, int);
 806 extern int cpp_defined (cpp_reader *, const unsigned char *, int);
 807
 808 /* A preprocessing number.  Code assumes that any unused high bits of
 809    the double integer are set to zero.  */
 810 typedef unsigned HOST_WIDE_INT cpp_num_part;
 811 typedef struct cpp_num cpp_num;
 812 struct cpp_num
 813 {
 814   cpp_num_part high;
 815   cpp_num_part low;
 816   bool unsignedp;  /* True if value should be treated as unsigned.  */
 817   bool overflow;   /* True if the most recent calculation overflowed.  */
 818 };
 819
 820 /* cpplib provides two interfaces for interpretation of preprocessing
 821    numbers.
 822
 823    cpp_classify_number categorizes numeric constants according to
 824    their field (integer, floating point, or invalid), radix (decimal,
 825    octal, hexadecimal), and type suffixes.  */
 826
 827 #define CPP_N_CATEGORY  0x000F
 828 #define CPP_N_INVALID   0x0000
 829 #define CPP_N_INTEGER   0x0001
 830 #define CPP_N_FLOATING  0x0002
 831
 832 #define CPP_N_WIDTH     0x00F0
 833 #define CPP_N_SMALL     0x0010  /* int, float, shrot _Fract/Accum  */
 834 #define CPP_N_MEDIUM    0x0020  /* long, double, long _Fract/_Accum.  */
 835 #define CPP_N_LARGE     0x0040  /* long long, long double,
 836                                    long long _Fract/Accum.  */
 837
 838 #define CPP_N_WIDTH_MD  0xF0000 /* machine defined.  */
 839 #define CPP_N_MD_W      0x10000
 840 #define CPP_N_MD_Q      0x20000
 841
 842 #define CPP_N_RADIX     0x0F00
 843 #define CPP_N_DECIMAL   0x0100
 844 #define CPP_N_HEX       0x0200
 845 #define CPP_N_OCTAL     0x0400
 846 #define CPP_N_BINARY    0x0800
 847
 848 #define CPP_N_UNSIGNED  0x1000  /* Properties.  */
 849 #define CPP_N_IMAGINARY 0x2000
 850 #define CPP_N_DFLOAT    0x4000
 851 #define CPP_N_DEFAULT   0x8000
 852
 853 #define CPP_N_FRACT     0x100000 /* Fract types.  */
 854 #define CPP_N_ACCUM     0x200000 /* Accum types.  */
 855
 856 #define CPP_N_USERDEF   0x1000000 /* C++0x user-defined literal.  */
 857
 858 /* Classify a CPP_NUMBER token.  The return value is a combination of
 859    the flags from the above sets.  */
 860 extern unsigned cpp_classify_number (cpp_reader *, const cpp_token *,
 861                                      const char **, source_location);
 862
 863 /* Return the classification flags for a float suffix.  */
 864 extern unsigned int cpp_interpret_float_suffix (cpp_reader *, const char *,
 865                                                 size_t);
 866
 867 /* Return the classification flags for an int suffix.  */
 868 extern unsigned int cpp_interpret_int_suffix (cpp_reader *, const char *,
 869                                               size_t);
 870
 871 /* Evaluate a token classified as category CPP_N_INTEGER.  */
 872 extern cpp_num cpp_interpret_integer (cpp_reader *, const cpp_token *,
 873                                       unsigned int);
 874
 875 /* Sign extend a number, with PRECISION significant bits and all
 876    others assumed clear, to fill out a cpp_num structure.  */
 877 cpp_num cpp_num_sign_extend (cpp_num, size_t);
 878
 879 /* Diagnostic levels.  To get a diagnostic without associating a
 880    position in the translation unit with it, use cpp_error_with_line
 881    with a line number of zero.  */
 882
 883 enum {
 884   /* Warning, an error with -Werror.  */
 885   CPP_DL_WARNING = 0,
 886   /* Same as CPP_DL_WARNING, except it is not suppressed in system headers.  */
 887   CPP_DL_WARNING_SYSHDR,
 888   /* Warning, an error with -pedantic-errors or -Werror.  */
 889   CPP_DL_PEDWARN,
 890   /* An error.  */
 891   CPP_DL_ERROR,
 892   /* An internal consistency check failed.  Prints "internal error: ",
 893      otherwise the same as CPP_DL_ERROR.  */
 894   CPP_DL_ICE,
 895   /* An informative note following a warning.  */
 896   CPP_DL_NOTE,
 897   /* A fatal error.  */
 898   CPP_DL_FATAL
 899 };
 900
 901 /* Warning reason codes. Use a reason code of zero for unclassified warnings
 902    and errors that are not warnings.  */
 903 enum {
 904   CPP_W_NONE = 0,
 905   CPP_W_DEPRECATED,
 906   CPP_W_COMMENTS,
 907   CPP_W_MISSING_INCLUDE_DIRS,
 908   CPP_W_TRIGRAPHS,
 909   CPP_W_MULTICHAR,
 910   CPP_W_TRADITIONAL,
 911   CPP_W_LONG_LONG,
 912   CPP_W_ENDIF_LABELS,
 913   CPP_W_NUM_SIGN_CHANGE,
 914   CPP_W_VARIADIC_MACROS,
 915   CPP_W_BUILTIN_MACRO_REDEFINED,
 916   CPP_W_DOLLARS,
 917   CPP_W_UNDEF,
 918   CPP_W_UNUSED_MACROS,
 919   CPP_W_CXX_OPERATOR_NAMES,
 920   CPP_W_NORMALIZE,
 921   CPP_W_INVALID_PCH,
 922   CPP_W_WARNING_DIRECTIVE,
 923   CPP_W_LITERAL_SUFFIX
 924 };
 925
 926 /* Output a diagnostic of some kind.  */
 927 extern bool cpp_error (cpp_reader *, int, const char *msgid, ...)
 928   ATTRIBUTE_PRINTF_3;
 929 extern bool cpp_warning (cpp_reader *, int, const char *msgid, ...)
 930   ATTRIBUTE_PRINTF_3;
 931 extern bool cpp_pedwarning (cpp_reader *, int, const char *msgid, ...)
 932   ATTRIBUTE_PRINTF_3;
 933 extern bool cpp_warning_syshdr (cpp_reader *, int, const char *msgid, ...)
 934   ATTRIBUTE_PRINTF_3;
 935
 936 /* Output a diagnostic with "MSGID: " preceding the
 937    error string of errno.  No location is printed.  */
 938 extern bool cpp_errno (cpp_reader *, int, const char *msgid);
 939
 940 /* Same as cpp_error, except additionally specifies a position as a
 941    (translation unit) physical line and physical column.  If the line is
 942    zero, then no location is printed.  */
 943 extern bool cpp_error_with_line (cpp_reader *, int, source_location,
 944                                  unsigned, const char *msgid, ...)
 945   ATTRIBUTE_PRINTF_5;
 946 extern bool cpp_warning_with_line (cpp_reader *, int, source_location,
 947                                    unsigned, const char *msgid, ...)
 948   ATTRIBUTE_PRINTF_5;
 949 extern bool cpp_pedwarning_with_line (cpp_reader *, int, source_location,
 950                                       unsigned, const char *msgid, ...)
 951   ATTRIBUTE_PRINTF_5;
 952 extern bool cpp_warning_with_line_syshdr (cpp_reader *, int, source_location,
 953                                           unsigned, const char *msgid, ...)
 954   ATTRIBUTE_PRINTF_5;
 955
 956 /* In lex.c */
 957 extern int cpp_ideq (const cpp_token *, const char *);
 958 extern void cpp_output_line (cpp_reader *, FILE *);
 959 extern unsigned char *cpp_output_line_to_string (cpp_reader *,
 960                                                  const unsigned char *);
 961 extern void cpp_output_token (const cpp_token *, FILE *);
 962 extern const char *cpp_type2name (enum cpp_ttype, unsigned char flags);
 963 /* Returns the value of an escape sequence, truncated to the correct
 964    target precision.  PSTR points to the input pointer, which is just
 965    after the backslash.  LIMIT is how much text we have.  WIDE is true
 966    if the escape sequence is part of a wide character constant or
 967    string literal.  Handles all relevant diagnostics.  */
 968 extern cppchar_t cpp_parse_escape (cpp_reader *, const unsigned char ** pstr,
 969                                    const unsigned char *limit, int wide);
 970
 971 /* Structure used to hold a comment block at a given location in the
 972    source code.  */
 973
 974 typedef struct
 975 {
 976   /* Text of the comment including the terminators.  */
 977   char *comment;
 978
 979   /* source location for the given comment.  */
 980   source_location sloc;
 981 } cpp_comment;
 982
 983 /* Structure holding all comments for a given cpp_reader.  */
 984
 985 typedef struct
 986 {
 987   /* table of comment entries.  */
 988   cpp_comment *entries;
 989
 990   /* number of actual entries entered in the table.  */
 991   int count;
 992
 993   /* number of entries allocated currently.  */
 994   int allocated;
 995 } cpp_comment_table;
 996
 997 /* Returns the table of comments encountered by the preprocessor. This
 998    table is only populated when pfile->state.save_comments is true. */
 999 extern cpp_comment_table *cpp_get_comments (cpp_reader *);
1000
1001 /* In hash.c */
1002
1003 /* Lookup an identifier in the hashtable.  Puts the identifier in the
1004    table if it is not already there.  */
1005 extern cpp_hashnode *cpp_lookup (cpp_reader *, const unsigned char *,
1006                                  unsigned int);
1007
1008 typedef int (*cpp_cb) (cpp_reader *, cpp_hashnode *, void *);
1009 extern void cpp_forall_identifiers (cpp_reader *, cpp_cb, void *);
1010
1011 /* In macro.c */
1012 extern void cpp_scan_nooutput (cpp_reader *);
1013 extern int  cpp_sys_macro_p (cpp_reader *);
1014 extern unsigned char *cpp_quote_string (unsigned char *, const unsigned char *,
1015                                         unsigned int);
1016
1017 /* In files.c */
1018 extern bool cpp_included (cpp_reader *, const char *);
1019 extern bool cpp_included_before (cpp_reader *, const char *, source_location);
1020 extern void cpp_make_system_header (cpp_reader *, int, int);
1021 extern bool cpp_push_include (cpp_reader *, const char *);
1022 extern bool cpp_push_default_include (cpp_reader *, const char *);
1023 extern void cpp_change_file (cpp_reader *, enum lc_reason, const char *);
1024 extern const char *cpp_get_path (struct _cpp_file *);
1025 extern cpp_dir *cpp_get_dir (struct _cpp_file *);
1026 extern cpp_buffer *cpp_get_buffer (cpp_reader *);
1027 extern struct _cpp_file *cpp_get_file (cpp_buffer *);
1028 extern cpp_buffer *cpp_get_prev (cpp_buffer *);
1029 extern void cpp_clear_file_cache (cpp_reader *);
1030
1031 /* In pch.c */
1032 struct save_macro_data;
1033 extern int cpp_save_state (cpp_reader *, FILE *);
1034 extern int cpp_write_pch_deps (cpp_reader *, FILE *);
1035 extern int cpp_write_pch_state (cpp_reader *, FILE *);
1036 extern int cpp_valid_state (cpp_reader *, const char *, int);
1037 extern void cpp_prepare_state (cpp_reader *, struct save_macro_data **);
1038 extern int cpp_read_state (cpp_reader *, const char *, FILE *,
1039                            struct save_macro_data *);
1040
1041 /* In lex.c */
1042 extern void cpp_force_token_locations (cpp_reader *, source_location *);
1043 extern void cpp_stop_forcing_token_locations (cpp_reader *);
1044
1045 /* In expr.c */
1046 extern enum cpp_ttype cpp_userdef_string_remove_type
1047   (enum cpp_ttype type);
1048 extern enum cpp_ttype cpp_userdef_string_add_type
1049   (enum cpp_ttype type);
1050 extern enum cpp_ttype cpp_userdef_char_remove_type
1051   (enum cpp_ttype type);
1052 extern enum cpp_ttype cpp_userdef_char_add_type
1053   (enum cpp_ttype type);
1054 extern bool cpp_userdef_string_p
1055   (enum cpp_ttype type);
1056 extern bool cpp_userdef_char_p
1057   (enum cpp_ttype type);
1058 extern const char * cpp_get_userdef_suffix
1059   (const cpp_token *);
1060
1061 #endif /* ! LIBCPP_CPPLIB_H */