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