gcc/cpplib.h

   1 /* Definitions for CPP library.
   2    Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001
   3    Free Software Foundation, Inc.
   4    Written by Per Bothner, 1994-95.
   5
   6 This program is free software; you can redistribute it and/or modify it
   7 under the terms of the GNU General Public License as published by the
   8 Free Software Foundation; either version 2, or (at your option) any
   9 later version.
  10
  11 This program is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with this program; if not, write to the Free Software
  18 Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  19
  20  In other words, you are welcome to use, share and improve this program.
  21  You are forbidden to forbid anyone else to use, share and improve
  22  what you give them.   Help stamp out software-hoarding!  */
  23 #ifndef GCC_CPPLIB_H
  24 #define GCC_CPPLIB_H
  25
  26 #include <sys/types.h>
  27 #include "hashtable.h"
  28 #include "line-map.h"
  29
  30 #ifdef __cplusplus
  31 extern "C" {
  32 #endif
  33
  34 /* For complex reasons, cpp_reader is also typedefed in c-pragma.h.  */
  35 #ifndef GCC_C_PRAGMA_H
  36 typedef struct cpp_reader cpp_reader;
  37 #endif
  38 typedef struct cpp_buffer cpp_buffer;
  39 typedef struct cpp_options cpp_options;
  40 typedef struct cpp_token cpp_token;
  41 typedef struct cpp_string cpp_string;
  42 typedef struct cpp_hashnode cpp_hashnode;
  43 typedef struct cpp_macro cpp_macro;
  44 typedef struct cpp_callbacks cpp_callbacks;
  45
  46 struct answer;
  47 struct file_name_map_list;
  48
  49 /* The first two groups, apart from '=', can appear in preprocessor
  50    expressions.  This allows a lookup table to be implemented in
  51    _cpp_parse_expr.
  52
  53    The first group, to CPP_LAST_EQ, can be immediately followed by an
  54    '='.  The lexer needs operators ending in '=', like ">>=", to be in
  55    the same order as their counterparts without the '=', like ">>".  */
  56
  57 /* Positions in the table.  */
  58 #define CPP_LAST_EQ CPP_MAX
  59 #define CPP_FIRST_DIGRAPH CPP_HASH
  60 #define CPP_LAST_PUNCTUATOR CPP_DOT_STAR
  61
  62 #define TTYPE_TABLE                             \
  63   OP(CPP_EQ = 0,        "=")                    \
  64   OP(CPP_NOT,           "!")                    \
  65   OP(CPP_GREATER,       ">")    /* compare */   \
  66   OP(CPP_LESS,          "<")                    \
  67   OP(CPP_PLUS,          "+")    /* math */      \
  68   OP(CPP_MINUS,         "-")                    \
  69   OP(CPP_MULT,          "*")                    \
  70   OP(CPP_DIV,           "/")                    \
  71   OP(CPP_MOD,           "%")                    \
  72   OP(CPP_AND,           "&")    /* bit ops */   \
  73   OP(CPP_OR,            "|")                    \
  74   OP(CPP_XOR,           "^")                    \
  75   OP(CPP_RSHIFT,        ">>")                   \
  76   OP(CPP_LSHIFT,        "<<")                   \
  77   OP(CPP_MIN,           "<?")   /* extension */ \
  78   OP(CPP_MAX,           ">?")                   \
  79 \
  80   OP(CPP_COMPL,         "~")                    \
  81   OP(CPP_AND_AND,       "&&")   /* logical */   \
  82   OP(CPP_OR_OR,         "||")                   \
  83   OP(CPP_QUERY,         "?")                    \
  84   OP(CPP_COLON,         ":")                    \
  85   OP(CPP_COMMA,         ",")    /* grouping */  \
  86   OP(CPP_OPEN_PAREN,    "(")                    \
  87   OP(CPP_CLOSE_PAREN,   ")")                    \
  88   OP(CPP_EQ_EQ,         "==")   /* compare */   \
  89   OP(CPP_NOT_EQ,        "!=")                   \
  90   OP(CPP_GREATER_EQ,    ">=")                   \
  91   OP(CPP_LESS_EQ,       "<=")                   \
  92 \
  93   OP(CPP_PLUS_EQ,       "+=")   /* math */      \
  94   OP(CPP_MINUS_EQ,      "-=")                   \
  95   OP(CPP_MULT_EQ,       "*=")                   \
  96   OP(CPP_DIV_EQ,        "/=")                   \
  97   OP(CPP_MOD_EQ,        "%=")                   \
  98   OP(CPP_AND_EQ,        "&=")   /* bit ops */   \
  99   OP(CPP_OR_EQ,         "|=")                   \
 100   OP(CPP_XOR_EQ,        "^=")                   \
 101   OP(CPP_RSHIFT_EQ,     ">>=")                  \
 102   OP(CPP_LSHIFT_EQ,     "<<=")                  \
 103   OP(CPP_MIN_EQ,        "<?=")  /* extension */ \
 104   OP(CPP_MAX_EQ,        ">?=")                  \
 105   /* Digraphs together, beginning with CPP_FIRST_DIGRAPH.  */   \
 106   OP(CPP_HASH,          "#")    /* digraphs */  \
 107   OP(CPP_PASTE,         "##")                   \
 108   OP(CPP_OPEN_SQUARE,   "[")                    \
 109   OP(CPP_CLOSE_SQUARE,  "]")                    \
 110   OP(CPP_OPEN_BRACE,    "{")                    \
 111   OP(CPP_CLOSE_BRACE,   "}")                    \
 112   /* The remainder of the punctuation.  Order is not significant.  */   \
 113   OP(CPP_SEMICOLON,     ";")    /* structure */ \
 114   OP(CPP_ELLIPSIS,      "...")                  \
 115   OP(CPP_PLUS_PLUS,     "++")   /* increment */ \
 116   OP(CPP_MINUS_MINUS,   "--")                   \
 117   OP(CPP_DEREF,         "->")   /* accessors */ \
 118   OP(CPP_DOT,           ".")                    \
 119   OP(CPP_SCOPE,         "::")                   \
 120   OP(CPP_DEREF_STAR,    "->*")                  \
 121   OP(CPP_DOT_STAR,      ".*")                   \
 122   OP(CPP_ATSIGN,        "@")  /* used in Objective C */ \
 123 \
 124   TK(CPP_NAME,          SPELL_IDENT)    /* word */                      \
 125   TK(CPP_NUMBER,        SPELL_NUMBER)   /* 34_be+ta  */                 \
 126 \
 127   TK(CPP_CHAR,          SPELL_STRING)   /* 'char' */                    \
 128   TK(CPP_WCHAR,         SPELL_STRING)   /* L'char' */                   \
 129   TK(CPP_OTHER,         SPELL_CHAR)     /* stray punctuation */         \
 130 \
 131   TK(CPP_STRING,        SPELL_STRING)   /* "string" */                  \
 132   TK(CPP_WSTRING,       SPELL_STRING)   /* L"string" */                 \
 133   TK(CPP_HEADER_NAME,   SPELL_STRING)   /* <stdio.h> in #include */     \
 134 \
 135   TK(CPP_COMMENT,       SPELL_NUMBER)   /* Only if output comments.  */ \
 136                                         /* SPELL_NUMBER happens to DTRT.  */ \
 137   TK(CPP_MACRO_ARG,     SPELL_NONE)     /* Macro argument.  */          \
 138   TK(CPP_PADDING,       SPELL_NONE)     /* Whitespace for cpp0.  */     \
 139   TK(CPP_EOF,           SPELL_NONE)     /* End of line or file.  */
 140
 141 #define OP(e, s) e,
 142 #define TK(e, s) e,
 143 enum cpp_ttype
 144 {
 145   TTYPE_TABLE
 146   N_TTYPES
 147 };
 148 #undef OP
 149 #undef TK
 150
 151 /* C language kind, used when calling cpp_reader_init.  */
 152 enum c_lang {CLK_GNUC89 = 0, CLK_GNUC99, CLK_STDC89, CLK_STDC94, CLK_STDC99,
 153              CLK_GNUCXX, CLK_CXX98, CLK_OBJC, CLK_OBJCXX, CLK_ASM};
 154
 155 /* Payload of a NUMBER, FLOAT, STRING, or COMMENT token.  */
 156 struct cpp_string
 157 {
 158   unsigned int len;
 159   const unsigned char *text;
 160 };
 161
 162 /* Flags for the cpp_token structure.  */
 163 #define PREV_WHITE      (1 << 0) /* If whitespace before this token.  */
 164 #define DIGRAPH         (1 << 1) /* If it was a digraph.  */
 165 #define STRINGIFY_ARG   (1 << 2) /* If macro argument to be stringified.  */
 166 #define PASTE_LEFT      (1 << 3) /* If on LHS of a ## operator.  */
 167 #define NAMED_OP        (1 << 4) /* C++ named operators.  */
 168 #define NO_EXPAND       (1 << 5) /* Do not macro-expand this token.  */
 169 #define BOL             (1 << 6) /* Token at beginning of line.  */
 170
 171 /* A preprocessing token.  This has been carefully packed and should
 172    occupy 16 bytes on 32-bit hosts and 24 bytes on 64-bit hosts.  */
 173 struct cpp_token
 174 {
 175   unsigned int line;            /* Logical line of first char of token.  */
 176   unsigned short col;           /* Column of first char of token.  */
 177   ENUM_BITFIELD(cpp_ttype) type : CHAR_BIT;  /* token type */
 178   unsigned char flags;          /* flags - see above */
 179
 180   union
 181   {
 182     cpp_hashnode *node;         /* An identifier.  */
 183     const cpp_token *source;    /* Inherit padding from this token.  */
 184     struct cpp_string str;      /* A string, or number.  */
 185     unsigned int arg_no;        /* Argument no. for a CPP_MACRO_ARG.  */
 186     unsigned char c;            /* Character represented by CPP_OTHER.  */
 187   } val;
 188 };
 189
 190 /* A standalone character.  We may want to make it unsigned for the
 191    same reason we use unsigned char - to avoid signedness issues.  */
 192 typedef int cppchar_t;
 193
 194 /* Values for opts.dump_macros.
 195   dump_only means inhibit output of the preprocessed text
 196              and instead output the definitions of all user-defined
 197              macros in a form suitable for use as input to cpp.
 198    dump_names means pass #define and the macro name through to output.
 199    dump_definitions means pass the whole definition (plus #define) through
 200 */
 201 enum { dump_none = 0, dump_only, dump_names, dump_definitions };
 202
 203 /* This structure is nested inside struct cpp_reader, and
 204    carries all the options visible to the command line.  */
 205 struct cpp_options
 206 {
 207   /* Name of input and output files.  */
 208   const char *in_fname;
 209   const char *out_fname;
 210
 211   /* Characters between tab stops.  */
 212   unsigned int tabstop;
 213
 214   /* Pending options - -D, -U, -A, -I, -ixxx.  */
 215   struct cpp_pending *pending;
 216
 217   /* File name which deps are being written to.  This is 0 if deps are
 218      being written to stdout.  */
 219   const char *deps_file;
 220
 221   /* Search paths for include files.  */
 222   struct search_path *quote_include;    /* "" */
 223   struct search_path *bracket_include;  /* <> */
 224
 225   /* Map between header names and file names, used only on DOS where
 226      file names are limited in length.  */
 227   struct file_name_map_list *map_list;
 228
 229   /* Directory prefix that should replace `/usr/lib/gcc-lib/TARGET/VERSION'
 230      in the standard include file directories.  */
 231   const char *include_prefix;
 232   unsigned int include_prefix_len;
 233
 234   /* -fleading_underscore sets this to "_".  */
 235   const char *user_label_prefix;
 236
 237   /* The language we're preprocessing.  */
 238   enum c_lang lang;
 239
 240   /* Non-0 means -v, so print the full set of include dirs.  */
 241   unsigned char verbose;
 242
 243   /* Nonzero means use extra default include directories for C++.  */
 244   unsigned char cplusplus;
 245
 246   /* Nonzero means handle cplusplus style comments */
 247   unsigned char cplusplus_comments;
 248
 249   /* Nonzero means handle #import, for objective C.  */
 250   unsigned char objc;
 251
 252   /* Nonzero means don't copy comments into the output file.  */
 253   unsigned char discard_comments;
 254
 255   /* Nonzero means process the ISO trigraph sequences.  */
 256   unsigned char trigraphs;
 257
 258   /* Nonzero means process the ISO digraph sequences.  */
 259   unsigned char digraphs;
 260
 261   /* Nonzero means to allow hexadecimal floats and LL suffixes.  */
 262   unsigned char extended_numbers;
 263
 264   /* Nonzero means print the names of included files rather than the
 265      preprocessed output.  1 means just the #include "...", 2 means
 266      #include <...> as well.  */
 267   unsigned char print_deps;
 268
 269   /* Nonzero if phony targets are created for each header.  */
 270   unsigned char deps_phony_targets;
 271
 272   /* Nonzero if missing .h files in -M output are assumed to be
 273      generated files and not errors.  */
 274   unsigned char print_deps_missing_files;
 275
 276   /* If true, fopen (deps_file, "a") else fopen (deps_file, "w").  */
 277   unsigned char print_deps_append;
 278
 279   /* Nonzero means print names of header files (-H).  */
 280   unsigned char print_include_names;
 281
 282   /* Nonzero means cpp_pedwarn causes a hard error.  */
 283   unsigned char pedantic_errors;
 284
 285   /* Nonzero means don't print warning messages.  */
 286   unsigned char inhibit_warnings;
 287
 288   /* Nonzero means don't suppress warnings from system headers.  */
 289   unsigned char warn_system_headers;
 290
 291   /* Nonzero means don't print error messages.  Has no option to
 292      select it, but can be set by a user of cpplib (e.g. fix-header).  */
 293   unsigned char inhibit_errors;
 294
 295   /* Nonzero means warn if slash-star appears in a comment.  */
 296   unsigned char warn_comments;
 297
 298   /* Nonzero means warn if there are any trigraphs.  */
 299   unsigned char warn_trigraphs;
 300
 301   /* Nonzero means warn if #import is used.  */
 302   unsigned char warn_import;
 303
 304   /* Nonzero means warn about various incompatibilities with
 305      traditional C.  */
 306   unsigned char warn_traditional;
 307
 308   /* Nonzero means turn warnings into errors.  */
 309   unsigned char warnings_are_errors;
 310
 311   /* Nonzero causes output not to be done, but directives such as
 312      #define that have side effects are still obeyed.  */
 313   unsigned char no_output;
 314
 315   /* Nonzero means we should look for header.gcc files that remap file
 316      names.  */
 317   unsigned char remap;
 318
 319   /* Nonzero means don't output line number information.  */
 320   unsigned char no_line_commands;
 321
 322   /* Nonzero means -I- has been seen, so don't look for #include "foo"
 323      the source-file directory.  */
 324   unsigned char ignore_srcdir;
 325
 326   /* Zero means dollar signs are punctuation.  */
 327   unsigned char dollars_in_ident;
 328
 329   /* Nonzero means warn if undefined identifiers are evaluated in an #if.  */
 330   unsigned char warn_undef;
 331
 332   /* Nonzero for the 1999 C Standard, including corrigenda and amendments.  */
 333   unsigned char c99;
 334
 335   /* Nonzero means give all the error messages the ANSI standard requires.  */
 336   unsigned char pedantic;
 337
 338   /* Nonzero means we're looking at already preprocessed code, so don't
 339      bother trying to do macro expansion and whatnot.  */
 340   unsigned char preprocessed;
 341
 342   /* Nonzero disables all the standard directories for headers.  */
 343   unsigned char no_standard_includes;
 344
 345   /* Nonzero disables the C++-specific standard directories for headers.  */
 346   unsigned char no_standard_cplusplus_includes;
 347
 348   /* Nonzero means dump macros in some fashion - see above.  */
 349   unsigned char dump_macros;
 350
 351   /* Nonzero means pass #include lines through to the output.  */
 352   unsigned char dump_includes;
 353
 354   /* Print column number in error messages.  */
 355   unsigned char show_column;
 356
 357   /* Nonzero means handle C++ alternate operator names.  */
 358   unsigned char operator_names;
 359
 360   /* True if --help, --version or --target-help appeared in the
 361      options.  Stand-alone CPP should then bail out after option
 362      parsing; drivers might want to continue printing help.  */
 363   unsigned char help_only;
 364 };
 365
 366 /* Call backs.  */
 367 struct cpp_callbacks
 368 {
 369   /* Called when a new line of preprocessed output is started.  */
 370   void (*line_change) PARAMS ((cpp_reader *, const cpp_token *, int));
 371   void (*file_change) PARAMS ((cpp_reader *, const struct line_map *));
 372   void (*include) PARAMS ((cpp_reader *, unsigned int,
 373                            const unsigned char *, const cpp_token *));
 374   void (*define) PARAMS ((cpp_reader *, unsigned int, cpp_hashnode *));
 375   void (*undef) PARAMS ((cpp_reader *, unsigned int, cpp_hashnode *));
 376   void (*ident) PARAMS ((cpp_reader *, unsigned int, const cpp_string *));
 377   void (*def_pragma) PARAMS ((cpp_reader *, unsigned int));
 378 };
 379
 380 #define CPP_FATAL_LIMIT 1000
 381 /* True if we have seen a "fatal" error.  */
 382 #define CPP_FATAL_ERRORS(PFILE) (cpp_errors (PFILE) >= CPP_FATAL_LIMIT)
 383
 384 /* Name under which this program was invoked.  */
 385 extern const char *progname;
 386
 387 /* The structure of a node in the hash table.  The hash table has
 388    entries for all identifiers: either macros defined by #define
 389    commands (type NT_MACRO), assertions created with #assert
 390    (NT_ASSERTION), or neither of the above (NT_VOID).  Builtin macros
 391    like __LINE__ are flagged NODE_BUILTIN.  Poisioned identifiers are
 392    flagged NODE_POISONED.  NODE_OPERATOR (C++ only) indicates an
 393    identifier that behaves like an operator such as "xor".
 394    NODE_DIAGNOSTIC is for speed in lex_token: it indicates a
 395    diagnostic may be required for this node.  Currently this only
 396    applies to __VA_ARGS__ and poisoned identifiers.  */
 397
 398 /* Hash node flags.  */
 399 #define NODE_OPERATOR   (1 << 0)        /* C++ named operator.  */
 400 #define NODE_POISONED   (1 << 1)        /* Poisoned identifier.  */
 401 #define NODE_BUILTIN    (1 << 2)        /* Builtin macro.  */
 402 #define NODE_DIAGNOSTIC (1 << 3)        /* Possible diagnostic when lexed.  */
 403 #define NODE_WARN       (1 << 4)        /* Warn if redefined or undefined.  */
 404 #define NODE_DISABLED   (1 << 5)        /* A disabled macro.  */
 405
 406 /* Different flavors of hash node.  */
 407 enum node_type
 408 {
 409   NT_VOID = 0,     /* No definition yet.  */
 410   NT_MACRO,        /* A macro of some form.  */
 411   NT_ASSERTION     /* Predicate for #assert.  */
 412 };
 413
 414 /* Different flavors of builtin macro.  _Pragma is an operator, but we
 415    handle it with the builtin code for efficiency reasons.  */
 416 enum builtin_type
 417 {
 418   BT_SPECLINE = 0,              /* `__LINE__' */
 419   BT_DATE,                      /* `__DATE__' */
 420   BT_FILE,                      /* `__FILE__' */
 421   BT_BASE_FILE,                 /* `__BASE_FILE__' */
 422   BT_INCLUDE_LEVEL,             /* `__INCLUDE_LEVEL__' */
 423   BT_TIME,                      /* `__TIME__' */
 424   BT_STDC,                      /* `__STDC__' */
 425   BT_PRAGMA                     /* `_Pragma' operator */
 426 };
 427
 428 #define CPP_HASHNODE(HNODE)     ((cpp_hashnode *) (HNODE))
 429 #define HT_NODE(NODE)           ((ht_identifier *) (NODE))
 430 #define NODE_LEN(NODE)          HT_LEN (&(NODE)->ident)
 431 #define NODE_NAME(NODE)         HT_STR (&(NODE)->ident)
 432
 433 /* The common part of an identifier node shared amongst all 3 C front
 434    ends.  Also used to store CPP identifiers, which are a superset of
 435    identifiers in the grammatical sense.  */
 436 struct cpp_hashnode
 437 {
 438   struct ht_identifier ident;
 439   unsigned short arg_index;             /* Macro argument index.  */
 440   unsigned char directive_index;        /* Index into directive table.  */
 441   unsigned char rid_code;               /* Rid code - for front ends.  */
 442   ENUM_BITFIELD(node_type) type : 8;    /* CPP node type.  */
 443   unsigned char flags;                  /* CPP flags.  */
 444
 445   union
 446   {
 447     cpp_macro *macro;                   /* If a macro.  */
 448     struct answer *answers;             /* Answers to an assertion.  */
 449     enum cpp_ttype operator;            /* Code for a named operator.  */
 450     enum builtin_type builtin;          /* Code for a builtin macro.  */
 451   } value;
 452 };
 453
 454 /* Call this first to get a handle to pass to other functions.  */
 455 extern cpp_reader *cpp_create_reader PARAMS ((enum c_lang));
 456
 457 /* Call these to get pointers to the options and callback structures
 458    for a given reader.  These pointers are good until you call
 459    cpp_finish on that reader.  You can either edit the callbacks
 460    through the pointer returned from cpp_get_callbacks, or set them
 461    with cpp_set_callbacks.  */
 462 extern cpp_options *cpp_get_options PARAMS ((cpp_reader *));
 463 extern const struct line_maps *cpp_get_line_maps PARAMS ((cpp_reader *));
 464 extern cpp_callbacks *cpp_get_callbacks PARAMS ((cpp_reader *));
 465 extern void cpp_set_callbacks PARAMS ((cpp_reader *, cpp_callbacks *));
 466
 467 /* Now call cpp_handle_option[s] to handle 1[or more] switches.  The
 468    return value is the number of arguments used.  If
 469    cpp_handle_options returns without using all arguments, it couldn't
 470    understand the next switch.  When there are no switches left, you
 471    must call cpp_post_options before calling cpp_read_main_file.  Only
 472    after cpp_post_options are the contents of the cpp_options
 473    structure reliable.  Options processing is not completed until you
 474    call cpp_finish_options.  */
 475 extern int cpp_handle_options PARAMS ((cpp_reader *, int, char **));
 476 extern int cpp_handle_option PARAMS ((cpp_reader *, int, char **));
 477 extern void cpp_post_options PARAMS ((cpp_reader *));
 478
 479 /* This function reads the file, but does not start preprocessing.  It
 480    returns the name of the original file; this is the same as the
 481    input file, except for preprocessed input.  This will generate at
 482    least one file change callback, and possibly a line change callback
 483    too.  If there was an error opening the file, it returns NULL.
 484
 485    If you want cpplib to manage its own hashtable, pass in a NULL
 486    pointer.  Otherise you should pass in an initialised hash table
 487    that cpplib will share; this technique is used by the C front
 488    ends.  */
 489 extern const char *cpp_read_main_file PARAMS ((cpp_reader *, const char *,
 490                                                struct ht *));
 491
 492 /* Deferred handling of command line options that can generate debug
 493    callbacks, such as -D and -imacros.  Call this after
 494    cpp_read_main_file.  The front ends need this separation so they
 495    can initialize debug output with the original file name, returned
 496    from cpp_read_main_file, before they get debug callbacks.  */
 497 extern void cpp_finish_options PARAMS ((cpp_reader *));
 498
 499 /* Call this to release the handle at the end of preprocessing.  Any
 500    use of the handle after this function returns is invalid.  Returns
 501    cpp_errors (pfile).  */
 502 extern int cpp_destroy PARAMS ((cpp_reader *));
 503
 504 /* Error count.  */
 505 extern unsigned int cpp_errors PARAMS ((cpp_reader *));
 506
 507 extern unsigned int cpp_token_len PARAMS ((const cpp_token *));
 508 extern unsigned char *cpp_token_as_text PARAMS ((cpp_reader *,
 509                                                  const cpp_token *));
 510 extern unsigned char *cpp_spell_token PARAMS ((cpp_reader *, const cpp_token *,
 511                                                unsigned char *));
 512 extern void cpp_register_pragma PARAMS ((cpp_reader *,
 513                                          const char *, const char *,
 514                                          void (*) PARAMS ((cpp_reader *))));
 515
 516 extern void cpp_finish PARAMS ((cpp_reader *));
 517 extern int cpp_avoid_paste PARAMS ((cpp_reader *, const cpp_token *,
 518                                     const cpp_token *));
 519 extern const cpp_token *cpp_get_token PARAMS ((cpp_reader *));
 520 extern const unsigned char *cpp_macro_definition PARAMS ((cpp_reader *,
 521                                                   const cpp_hashnode *));
 522 extern void _cpp_backup_tokens PARAMS ((cpp_reader *, unsigned int));
 523
 524 /* Evaluate a CPP_CHAR or CPP_WCHAR token.  */
 525 extern HOST_WIDE_INT
 526 cpp_interpret_charconst PARAMS ((cpp_reader *, const cpp_token *,
 527                                  int, int, unsigned int *));
 528
 529 extern void cpp_define PARAMS ((cpp_reader *, const char *));
 530 extern void cpp_assert PARAMS ((cpp_reader *, const char *));
 531 extern void cpp_undef  PARAMS ((cpp_reader *, const char *));
 532 extern void cpp_unassert PARAMS ((cpp_reader *, const char *));
 533
 534 extern cpp_buffer *cpp_push_buffer PARAMS ((cpp_reader *,
 535                                             const unsigned char *, size_t,
 536                                             int, int));
 537 extern int cpp_defined PARAMS ((cpp_reader *, const unsigned char *, int));
 538
 539 /* N.B. The error-message-printer prototypes have not been nicely
 540    formatted because exgettext needs to see 'msgid' on the same line
 541    as the name of the function in order to work properly.  Only the
 542    string argument gets a name in an effort to keep the lines from
 543    getting ridiculously oversized.  */
 544
 545 extern void cpp_ice PARAMS ((cpp_reader *, const char *msgid, ...))
 546   ATTRIBUTE_PRINTF_2;
 547 extern void cpp_fatal PARAMS ((cpp_reader *, const char *msgid, ...))
 548   ATTRIBUTE_PRINTF_2;
 549 extern void cpp_error PARAMS ((cpp_reader *, const char *msgid, ...))
 550   ATTRIBUTE_PRINTF_2;
 551 extern void cpp_warning PARAMS ((cpp_reader *, const char *msgid, ...))
 552   ATTRIBUTE_PRINTF_2;
 553 extern void cpp_pedwarn PARAMS ((cpp_reader *, const char *msgid, ...))
 554   ATTRIBUTE_PRINTF_2;
 555 extern void cpp_notice PARAMS ((cpp_reader *, const char *msgid, ...))
 556   ATTRIBUTE_PRINTF_2;
 557 extern void cpp_error_with_line PARAMS ((cpp_reader *, int, int, const char *msgid, ...))
 558   ATTRIBUTE_PRINTF_4;
 559 extern void cpp_warning_with_line PARAMS ((cpp_reader *, int, int, const char *msgid, ...))
 560   ATTRIBUTE_PRINTF_4;
 561 extern void cpp_pedwarn_with_line PARAMS ((cpp_reader *, int, int, const char *msgid, ...))
 562   ATTRIBUTE_PRINTF_4;
 563 extern void cpp_error_from_errno PARAMS ((cpp_reader *, const char *));
 564 extern void cpp_notice_from_errno PARAMS ((cpp_reader *, const char *));
 565
 566 /* In cpplex.c */
 567 extern int cpp_ideq                     PARAMS ((const cpp_token *,
 568                                                  const char *));
 569 extern void cpp_output_line             PARAMS ((cpp_reader *, FILE *));
 570 extern void cpp_output_token            PARAMS ((const cpp_token *, FILE *));
 571 extern const char *cpp_type2name        PARAMS ((enum cpp_ttype));
 572 extern unsigned int cpp_parse_escape    PARAMS ((cpp_reader *,
 573                                                  const unsigned char **,
 574                                                  const unsigned char *,
 575                                                  unsigned HOST_WIDE_INT, int));
 576
 577 /* In cpphash.c */
 578
 579 /* Lookup an identifier in the hashtable.  Puts the identifier in the
 580    table if it is not already there.  */
 581 extern cpp_hashnode *cpp_lookup         PARAMS ((cpp_reader *,
 582                                                  const unsigned char *,
 583                                                  unsigned int));
 584
 585 typedef int (*cpp_cb) PARAMS ((cpp_reader *, cpp_hashnode *, void *));
 586 extern void cpp_forall_identifiers      PARAMS ((cpp_reader *,
 587                                                  cpp_cb, void *));
 588
 589 /* In cppmacro.c */
 590 extern void cpp_scan_nooutput           PARAMS ((cpp_reader *));
 591 extern int  cpp_sys_macro_p             PARAMS ((cpp_reader *));
 592
 593 /* In cppfiles.c */
 594 extern int cpp_included PARAMS ((cpp_reader *, const char *));
 595 extern void cpp_make_system_header PARAMS ((cpp_reader *, int, int));
 596
 597 #ifdef __cplusplus
 598 }
 599 #endif
 600
 601 #endif /* ! GCC_CPPLIB_H */