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__
  24 #define __GCC_CPPLIB__
  25
  26 #include <sys/types.h>
  27
  28 #ifdef __cplusplus
  29 extern "C" {
  30 #endif
  31
  32 /* For complex reasons, cpp_reader is also typedefed in c-pragma.h.  */
  33 #ifndef _C_PRAGMA_H
  34 typedef struct cpp_reader cpp_reader;
  35 #endif
  36 typedef struct cpp_buffer cpp_buffer;
  37 typedef struct cpp_options cpp_options;
  38 typedef struct cpp_token cpp_token;
  39 typedef struct cpp_string cpp_string;
  40 typedef struct cpp_hashnode cpp_hashnode;
  41 typedef struct cpp_macro cpp_macro;
  42 typedef struct cpp_lexer_pos cpp_lexer_pos;
  43 typedef struct cpp_lookahead cpp_lookahead;
  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_INT,           SPELL_STRING)   /* 23 */                        \
 126   TK(CPP_FLOAT,         SPELL_STRING)   /* 3.14159 */                   \
 127   TK(CPP_NUMBER,        SPELL_STRING)   /* 34_be+ta  */                 \
 128 \
 129   TK(CPP_CHAR,          SPELL_STRING)   /* 'char' */                    \
 130   TK(CPP_WCHAR,         SPELL_STRING)   /* L'char' */                   \
 131   TK(CPP_OTHER,         SPELL_CHAR)     /* stray punctuation */         \
 132 \
 133   TK(CPP_STRING,        SPELL_STRING)   /* "string" */                  \
 134   TK(CPP_WSTRING,       SPELL_STRING)   /* L"string" */                 \
 135   TK(CPP_HEADER_NAME,   SPELL_STRING)   /* <stdio.h> in #include */     \
 136 \
 137   TK(CPP_COMMENT,       SPELL_STRING)   /* Only if output comments.  */ \
 138   TK(CPP_MACRO_ARG,     SPELL_NONE)     /* Macro argument.  */          \
 139   OP(CPP_EOF,           "EOL")          /* 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 AVOID_LPASTE    (1 << 6) /* Check left for accidental pastes.  */
 170
 171 /* A preprocessing token.  This has been carefully packed and should
 172    occupy 12 bytes on 32-bit hosts and 16 bytes on 64-bit hosts.  */
 173 struct cpp_token
 174 {
 175   ENUM_BITFIELD(cpp_ttype) type : CHAR_BIT;  /* token type */
 176   unsigned char flags;          /* flags - see above */
 177
 178   union
 179   {
 180     struct cpp_hashnode *node;  /* An identifier.  */
 181     struct cpp_string str;      /* A string, or number.  */
 182     unsigned int arg_no;        /* Argument no. for a CPP_MACRO_ARG.  */
 183     unsigned char c;            /* Character represented by CPP_OTHER.  */
 184   } val;
 185 };
 186
 187 /* The position of a token in the current file.  */
 188 struct cpp_lexer_pos
 189 {
 190   unsigned int line;
 191   unsigned int output_line;
 192   unsigned short col;
 193 };
 194
 195 typedef struct cpp_token_with_pos cpp_token_with_pos;
 196 struct cpp_token_with_pos
 197 {
 198   cpp_token token;
 199   cpp_lexer_pos pos;
 200 };
 201
 202 /* Token lookahead.  */
 203 struct cpp_lookahead
 204 {
 205   struct cpp_lookahead *next;
 206   cpp_token_with_pos *tokens;
 207   cpp_lexer_pos pos;
 208   unsigned int cur, count, cap;
 209 };
 210
 211 /* A standalone character.  We may want to make it unsigned for the
 212    same reason we use unsigned char - to avoid signedness issues.  */
 213 typedef int cppchar_t;
 214
 215 /* Values for opts.dump_macros.
 216   dump_only means inhibit output of the preprocessed text
 217              and instead output the definitions of all user-defined
 218              macros in a form suitable for use as input to cpp.
 219    dump_names means pass #define and the macro name through to output.
 220    dump_definitions means pass the whole definition (plus #define) through
 221 */
 222 enum { dump_none = 0, dump_only, dump_names, dump_definitions };
 223
 224 /* This structure is nested inside struct cpp_reader, and
 225    carries all the options visible to the command line.  */
 226 struct cpp_options
 227 {
 228   /* Name of input and output files.  */
 229   const char *in_fname;
 230   const char *out_fname;
 231
 232   /* Characters between tab stops.  */
 233   unsigned int tabstop;
 234
 235   /* Pending options - -D, -U, -A, -I, -ixxx. */
 236   struct cpp_pending *pending;
 237
 238   /* File name which deps are being written to.  This is 0 if deps are
 239      being written to stdout.  */
 240   const char *deps_file;
 241
 242   /* Search paths for include files.  */
 243   struct search_path *quote_include;    /* "" */
 244   struct search_path *bracket_include;  /* <> */
 245
 246   /* Map between header names and file names, used only on DOS where
 247      file names are limited in length.  */
 248   struct file_name_map_list *map_list;
 249
 250   /* Directory prefix that should replace `/usr/lib/gcc-lib/TARGET/VERSION'
 251      in the standard include file directories.  */
 252   const char *include_prefix;
 253   unsigned int include_prefix_len;
 254
 255   /* -fleading_underscore sets this to "_".  */
 256   const char *user_label_prefix;
 257
 258   /* The language we're preprocessing.  */
 259   enum c_lang lang;
 260
 261   /* Non-0 means -v, so print the full set of include dirs.  */
 262   unsigned char verbose;
 263
 264   /* Nonzero means use extra default include directories for C++.  */
 265   unsigned char cplusplus;
 266
 267   /* Nonzero means handle cplusplus style comments */
 268   unsigned char cplusplus_comments;
 269
 270   /* Nonzero means handle #import, for objective C.  */
 271   unsigned char objc;
 272
 273   /* Nonzero means don't copy comments into the output file.  */
 274   unsigned char discard_comments;
 275
 276   /* Nonzero means process the ISO trigraph sequences.  */
 277   unsigned char trigraphs;
 278
 279   /* Nonzero means process the ISO digraph sequences.  */
 280   unsigned char digraphs;
 281
 282   /* Nonzero means to allow hexadecimal floats and LL suffixes.  */
 283   unsigned char extended_numbers;
 284
 285   /* Nonzero means print the names of included files rather than the
 286      preprocessed output.  1 means just the #include "...", 2 means
 287      #include <...> as well.  */
 288   unsigned char print_deps;
 289
 290   /* Nonzero if phony targets are created for each header.  */
 291   unsigned char deps_phony_targets;
 292
 293   /* Nonzero if missing .h files in -M output are assumed to be
 294      generated files and not errors.  */
 295   unsigned char print_deps_missing_files;
 296
 297   /* If true, fopen (deps_file, "a") else fopen (deps_file, "w"). */
 298   unsigned char print_deps_append;
 299
 300   /* Nonzero means print names of header files (-H).  */
 301   unsigned char print_include_names;
 302
 303   /* Nonzero means cpp_pedwarn causes a hard error.  */
 304   unsigned char pedantic_errors;
 305
 306   /* Nonzero means don't print warning messages.  */
 307   unsigned char inhibit_warnings;
 308
 309   /* Nonzero means don't suppress warnings from system headers.  */
 310   unsigned char warn_system_headers;
 311
 312   /* Nonzero means don't print error messages.  Has no option to
 313      select it, but can be set by a user of cpplib (e.g. fix-header).  */
 314   unsigned char inhibit_errors;
 315
 316   /* Nonzero means warn if slash-star appears in a comment.  */
 317   unsigned char warn_comments;
 318
 319   /* Nonzero means warn if there are any trigraphs.  */
 320   unsigned char warn_trigraphs;
 321
 322   /* Nonzero means warn if #import is used.  */
 323   unsigned char warn_import;
 324
 325   /* Nonzero means warn about various incompatibilities with
 326      traditional C.  */
 327   unsigned char warn_traditional;
 328
 329   /* Nonzero means turn warnings into errors.  */
 330   unsigned char warnings_are_errors;
 331
 332   /* Nonzero causes output not to be done, but directives such as
 333      #define that have side effects are still obeyed.  */
 334   unsigned char no_output;
 335
 336   /* Nonzero means we should look for header.gcc files that remap file
 337      names.  */
 338   unsigned char remap;
 339
 340   /* Nonzero means don't output line number information.  */
 341   unsigned char no_line_commands;
 342
 343   /* Nonzero means -I- has been seen, so don't look for #include "foo"
 344      the source-file directory.  */
 345   unsigned char ignore_srcdir;
 346
 347   /* Zero means dollar signs are punctuation. */
 348   unsigned char dollars_in_ident;
 349
 350   /* Nonzero means warn if undefined identifiers are evaluated in an #if.  */
 351   unsigned char warn_undef;
 352
 353   /* Nonzero for the 1999 C Standard, including corrigenda and amendments.  */
 354   unsigned char c99;
 355
 356   /* Nonzero means give all the error messages the ANSI standard requires.  */
 357   unsigned char pedantic;
 358
 359   /* Nonzero means we're looking at already preprocessed code, so don't
 360      bother trying to do macro expansion and whatnot.  */
 361   unsigned char preprocessed;
 362
 363   /* Nonzero disables all the standard directories for headers.  */
 364   unsigned char no_standard_includes;
 365
 366   /* Nonzero disables the C++-specific standard directories for headers.  */
 367   unsigned char no_standard_cplusplus_includes;
 368
 369   /* Nonzero means dump macros in some fashion - see above.  */
 370   unsigned char dump_macros;
 371
 372   /* Nonzero means pass #include lines through to the output.  */
 373   unsigned char dump_includes;
 374
 375   /* Print column number in error messages.  */
 376   unsigned char show_column;
 377
 378   /* Treat C++ alternate operator names special.  */
 379   unsigned char operator_names;
 380
 381   /* True if --help, --version or --target-help appeared in the
 382      options.  Stand-alone CPP should then bail out after option
 383      parsing; drivers might want to continue printing help.  */
 384   unsigned char help_only;
 385 };
 386
 387 /* This structure is passed to the call back when changing file.  */
 388 enum cpp_fc_reason {FC_ENTER = 0, FC_LEAVE, FC_RENAME};
 389
 390 struct cpp_file_loc
 391 {
 392   const char *filename;
 393   unsigned int lineno;
 394 };
 395
 396 typedef struct cpp_file_change cpp_file_change;
 397 struct cpp_file_change
 398 {
 399   struct cpp_file_loc from;     /* Line of #include or #line.  */
 400   struct cpp_file_loc to;       /* Line after #include or #line, or start.  */
 401   enum cpp_fc_reason reason;    /* Reason for change.  */
 402   unsigned char sysp;           /* Nonzero if system header.  */
 403   unsigned char externc;        /* Nonzero if wrapper needed.  */
 404 };
 405
 406 /* Call backs.  */
 407 struct cpp_callbacks
 408 {
 409     void (*file_change) PARAMS ((cpp_reader *, const cpp_file_change *));
 410     void (*include) PARAMS ((cpp_reader *, const unsigned char *,
 411                              const cpp_token *));
 412     void (*define) PARAMS ((cpp_reader *, cpp_hashnode *));
 413     void (*undef) PARAMS ((cpp_reader *, cpp_hashnode *));
 414     void (*poison) PARAMS ((cpp_reader *));
 415     void (*ident) PARAMS ((cpp_reader *, const cpp_string *));
 416     void (*def_pragma) PARAMS ((cpp_reader *));
 417 };
 418
 419 #define CPP_FATAL_LIMIT 1000
 420 /* True if we have seen a "fatal" error. */
 421 #define CPP_FATAL_ERRORS(PFILE) (cpp_errors (PFILE) >= CPP_FATAL_LIMIT)
 422
 423 /* Name under which this program was invoked.  */
 424 extern const char *progname;
 425
 426 /* Where does this buffer come from?  A faked include, a source file,
 427    a builtin macro, a command-line option, or a _Pragma operator.  */
 428 enum cpp_buffer_type {BUF_FAKE, BUF_FILE, BUF_BUILTIN,
 429                       BUF_CL_OPTION, BUF_PRAGMA};
 430
 431 /* The structure of a node in the hash table.  The hash table has
 432    entries for all identifiers: either macros defined by #define
 433    commands (type NT_MACRO), assertions created with #assert
 434    (NT_ASSERTION), or neither of the above (NT_VOID).  Builtin macros
 435    like __LINE__ are flagged NODE_BUILTIN.  Poisioned identifiers are
 436    flagged NODE_POISONED.  NODE_OPERATOR (C++ only) indicates an
 437    identifier that behaves like an operator such as "xor".
 438    NODE_DIAGNOSTIC is for speed in lex_token: it indicates a
 439    diagnostic may be required for this node.  Currently this only
 440    applies to __VA_ARGS__ and poisoned identifiers.  */
 441
 442 /* Hash node flags.  */
 443 #define NODE_OPERATOR   (1 << 0)        /* C++ named operator.  */
 444 #define NODE_POISONED   (1 << 1)        /* Poisoned identifier.  */
 445 #define NODE_BUILTIN    (1 << 2)        /* Builtin macro.  */
 446 #define NODE_DIAGNOSTIC (1 << 3)        /* Possible diagnostic when lexed.  */
 447 #define NODE_WARN       (1 << 4)        /* Warn if redefined or undefined.  */
 448
 449 /* Different flavors of hash node.  */
 450 enum node_type
 451 {
 452   NT_VOID = 0,     /* No definition yet.  */
 453   NT_MACRO,        /* A macro of some form.  */
 454   NT_ASSERTION     /* Predicate for #assert.  */
 455 };
 456
 457 /* Different flavors of builtin macro.  */
 458 enum builtin_type
 459 {
 460   BT_SPECLINE = 0,              /* `__LINE__' */
 461   BT_DATE,                      /* `__DATE__' */
 462   BT_FILE,                      /* `__FILE__' */
 463   BT_BASE_FILE,                 /* `__BASE_FILE__' */
 464   BT_INCLUDE_LEVEL,             /* `__INCLUDE_LEVEL__' */
 465   BT_TIME,                      /* `__TIME__' */
 466   BT_STDC                       /* `__STDC__' */
 467 };
 468
 469 /* There is a slot in the hashnode for use by front ends when integrated
 470    with cpplib.  It holds a tree (see tree.h) but we mustn't drag that
 471    header into every user of cpplib.h.  cpplib does not do anything with
 472    this slot except clear it when a new node is created.  */
 473 union tree_node;
 474
 475 struct cpp_hashnode
 476 {
 477   const unsigned char *name;            /* Null-terminated name.  */
 478   unsigned int hash;                    /* Cached hash value.  */
 479   unsigned short length;                /* Length of name excluding null.  */
 480   unsigned short arg_index;             /* Macro argument index.  */
 481   unsigned char directive_index;        /* Index into directive table.  */
 482   ENUM_BITFIELD(node_type) type : 8;    /* Node type.  */
 483   unsigned char flags;                  /* Node flags.  */
 484
 485   union
 486   {
 487     cpp_macro *macro;                   /* If a macro.  */
 488     struct answer *answers;             /* Answers to an assertion.  */
 489     enum cpp_ttype operator;            /* Code for a named operator.  */
 490     enum builtin_type builtin;          /* Code for a builtin macro.  */
 491   } value;
 492 };
 493
 494 /* Call this first to get a handle to pass to other functions.  */
 495 extern cpp_reader *cpp_create_reader PARAMS ((enum c_lang));
 496
 497 /* Call this to release the handle.  Any use of the handle after this
 498    function returns is invalid.  Returns cpp_errors (pfile).  */
 499 extern int cpp_destroy PARAMS ((cpp_reader *));
 500
 501 /* Call these to get pointers to the options and callback structures
 502    for a given reader.  These pointers are good until you call
 503    cpp_finish on that reader.  You can either edit the callbacks
 504    through the pointer returned from cpp_get_callbacks, or set them
 505    with cpp_set_callbacks.  */
 506 extern cpp_options *cpp_get_options PARAMS ((cpp_reader *));
 507 extern cpp_callbacks *cpp_get_callbacks PARAMS ((cpp_reader *));
 508 extern void cpp_set_callbacks PARAMS ((cpp_reader *, cpp_callbacks *));
 509
 510 /* Now call cpp_handle_option[s] to handle 1[or more] switches.  The
 511    return value is the number of arguments used.  If
 512    cpp_handle_options returns without using all arguments, it couldn't
 513    understand the next switch.  When there are no switches left, you
 514    must call cpp_post_options before calling cpp_start_read.  Only
 515    after cpp_post_options are the contents of the cpp_options
 516    structure reliable.  */
 517 extern int cpp_handle_options PARAMS ((cpp_reader *, int, char **));
 518 extern int cpp_handle_option PARAMS ((cpp_reader *, int, char **));
 519 extern void cpp_post_options PARAMS ((cpp_reader *));
 520
 521 /* Error count.  */
 522 extern unsigned int cpp_errors PARAMS ((cpp_reader *));
 523
 524 extern unsigned int cpp_token_len PARAMS ((const cpp_token *));
 525 extern unsigned char *cpp_token_as_text PARAMS ((cpp_reader *,
 526                                                  const cpp_token *));
 527 extern unsigned char *cpp_spell_token PARAMS ((cpp_reader *, const cpp_token *,
 528                                                unsigned char *));
 529 extern void cpp_register_pragma PARAMS ((cpp_reader *,
 530                                          const char *, const char *,
 531                                          void (*) PARAMS ((cpp_reader *))));
 532 extern void cpp_register_pragma_space PARAMS ((cpp_reader *, const char *));
 533
 534 extern int cpp_start_read PARAMS ((cpp_reader *, const char *));
 535 extern void cpp_finish PARAMS ((cpp_reader *));
 536 extern int cpp_avoid_paste PARAMS ((cpp_reader *, const cpp_token *,
 537                                     const cpp_token *));
 538 extern enum cpp_ttype cpp_can_paste PARAMS ((cpp_reader *, const cpp_token *,
 539                                              const cpp_token *, int *));
 540 extern void cpp_get_token PARAMS ((cpp_reader *, cpp_token *));
 541 extern const cpp_lexer_pos *cpp_get_line PARAMS ((cpp_reader *));
 542 extern const unsigned char *cpp_macro_definition PARAMS ((cpp_reader *,
 543                                                   const cpp_hashnode *));
 544
 545 /* Evaluate a CPP_CHAR or CPP_WCHAR token.  */
 546 extern HOST_WIDE_INT
 547 cpp_interpret_charconst PARAMS ((cpp_reader *, const cpp_token *,
 548                                  int, int, unsigned int *));
 549
 550 extern void cpp_define PARAMS ((cpp_reader *, const char *));
 551 extern void cpp_assert PARAMS ((cpp_reader *, const char *));
 552 extern void cpp_undef  PARAMS ((cpp_reader *, const char *));
 553 extern void cpp_unassert PARAMS ((cpp_reader *, const char *));
 554
 555 extern cpp_buffer *cpp_push_buffer PARAMS ((cpp_reader *,
 556                                             const unsigned char *, size_t,
 557                                             enum cpp_buffer_type,
 558                                             const char *));
 559 extern cpp_buffer *cpp_pop_buffer PARAMS ((cpp_reader *));
 560 extern int cpp_defined PARAMS ((cpp_reader *, const unsigned char *, int));
 561
 562 /* N.B. The error-message-printer prototypes have not been nicely
 563    formatted because exgettext needs to see 'msgid' on the same line
 564    as the name of the function in order to work properly.  Only the
 565    string argument gets a name in an effort to keep the lines from
 566    getting ridiculously oversized.  */
 567
 568 extern void cpp_ice PARAMS ((cpp_reader *, const char *msgid, ...))
 569   ATTRIBUTE_PRINTF_2;
 570 extern void cpp_fatal PARAMS ((cpp_reader *, const char *msgid, ...))
 571   ATTRIBUTE_PRINTF_2;
 572 extern void cpp_error PARAMS ((cpp_reader *, const char *msgid, ...))
 573   ATTRIBUTE_PRINTF_2;
 574 extern void cpp_warning PARAMS ((cpp_reader *, const char *msgid, ...))
 575   ATTRIBUTE_PRINTF_2;
 576 extern void cpp_pedwarn PARAMS ((cpp_reader *, const char *msgid, ...))
 577   ATTRIBUTE_PRINTF_2;
 578 extern void cpp_notice PARAMS ((cpp_reader *, const char *msgid, ...))
 579   ATTRIBUTE_PRINTF_2;
 580 extern void cpp_error_with_line PARAMS ((cpp_reader *, int, int, const char *msgid, ...))
 581   ATTRIBUTE_PRINTF_4;
 582 extern void cpp_warning_with_line PARAMS ((cpp_reader *, int, int, const char *msgid, ...))
 583   ATTRIBUTE_PRINTF_4;
 584 extern void cpp_pedwarn_with_line PARAMS ((cpp_reader *, int, int, const char *msgid, ...))
 585   ATTRIBUTE_PRINTF_4;
 586 extern void cpp_pedwarn_with_file_and_line PARAMS ((cpp_reader *, const char *, int, int, const char *msgid, ...))
 587   ATTRIBUTE_PRINTF_5;
 588 extern void cpp_error_from_errno PARAMS ((cpp_reader *, const char *));
 589 extern void cpp_notice_from_errno PARAMS ((cpp_reader *, const char *));
 590
 591 /* In cpplex.c */
 592 extern int cpp_ideq                     PARAMS ((const cpp_token *,
 593                                                  const char *));
 594 extern void cpp_output_line             PARAMS ((cpp_reader *, FILE *));
 595 extern void cpp_output_token            PARAMS ((const cpp_token *, FILE *));
 596 extern const char *cpp_type2name        PARAMS ((enum cpp_ttype));
 597
 598 /* In cpphash.c */
 599 extern cpp_hashnode *cpp_lookup         PARAMS ((cpp_reader *,
 600                                                  const unsigned char *, size_t));
 601 extern void cpp_forall_identifiers      PARAMS ((cpp_reader *,
 602                                                  int (*) PARAMS ((cpp_reader *,
 603                                                                   cpp_hashnode *,
 604                                                                   void *)),
 605                                                  void *));
 606
 607 /* In cppmacro.c */
 608 extern void cpp_scan_buffer_nooutput    PARAMS ((cpp_reader *, int));
 609 extern void cpp_start_lookahead         PARAMS ((cpp_reader *));
 610 extern void cpp_stop_lookahead          PARAMS ((cpp_reader *, int));
 611 extern int  cpp_sys_macro_p             PARAMS ((cpp_reader *));
 612
 613 /* In cppfiles.c */
 614 extern int cpp_included PARAMS ((cpp_reader *, const char *));
 615 extern void cpp_make_system_header PARAMS ((cpp_reader *, int, int));
 616
 617 #ifdef __cplusplus
 618 }
 619 #endif
 620 #endif /* __GCC_CPPLIB__ */