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
  29 #ifdef __cplusplus
  30 extern "C" {
  31 #endif
  32
  33 /* For complex reasons, cpp_reader is also typedefed in c-pragma.h.  */
  34 #ifndef GCC_C_PRAGMA_H
  35 typedef struct cpp_reader cpp_reader;
  36 #endif
  37 typedef struct cpp_buffer cpp_buffer;
  38 typedef struct cpp_options cpp_options;
  39 typedef struct cpp_token cpp_token;
  40 typedef struct cpp_string cpp_string;
  41 typedef struct cpp_hashnode cpp_hashnode;
  42 typedef struct cpp_macro cpp_macro;
  43 typedef struct cpp_lexer_pos cpp_lexer_pos;
  44 typedef struct cpp_lookahead cpp_lookahead;
  45 typedef struct cpp_callbacks cpp_callbacks;
  46
  47 struct answer;
  48 struct file_name_map_list;
  49 struct ht;
  50
  51 /* The first two groups, apart from '=', can appear in preprocessor
  52    expressions.  This allows a lookup table to be implemented in
  53    _cpp_parse_expr.
  54
  55    The first group, to CPP_LAST_EQ, can be immediately followed by an
  56    '='.  The lexer needs operators ending in '=', like ">>=", to be in
  57    the same order as their counterparts without the '=', like ">>".  */
  58
  59 /* Positions in the table.  */
  60 #define CPP_LAST_EQ CPP_MAX
  61 #define CPP_FIRST_DIGRAPH CPP_HASH
  62 #define CPP_LAST_PUNCTUATOR CPP_DOT_STAR
  63
  64 #define TTYPE_TABLE                             \
  65   OP(CPP_EQ = 0,        "=")                    \
  66   OP(CPP_NOT,           "!")                    \
  67   OP(CPP_GREATER,       ">")    /* compare */   \
  68   OP(CPP_LESS,          "<")                    \
  69   OP(CPP_PLUS,          "+")    /* math */      \
  70   OP(CPP_MINUS,         "-")                    \
  71   OP(CPP_MULT,          "*")                    \
  72   OP(CPP_DIV,           "/")                    \
  73   OP(CPP_MOD,           "%")                    \
  74   OP(CPP_AND,           "&")    /* bit ops */   \
  75   OP(CPP_OR,            "|")                    \
  76   OP(CPP_XOR,           "^")                    \
  77   OP(CPP_RSHIFT,        ">>")                   \
  78   OP(CPP_LSHIFT,        "<<")                   \
  79   OP(CPP_MIN,           "<?")   /* extension */ \
  80   OP(CPP_MAX,           ">?")                   \
  81 \
  82   OP(CPP_COMPL,         "~")                    \
  83   OP(CPP_AND_AND,       "&&")   /* logical */   \
  84   OP(CPP_OR_OR,         "||")                   \
  85   OP(CPP_QUERY,         "?")                    \
  86   OP(CPP_COLON,         ":")                    \
  87   OP(CPP_COMMA,         ",")    /* grouping */  \
  88   OP(CPP_OPEN_PAREN,    "(")                    \
  89   OP(CPP_CLOSE_PAREN,   ")")                    \
  90   OP(CPP_EQ_EQ,         "==")   /* compare */   \
  91   OP(CPP_NOT_EQ,        "!=")                   \
  92   OP(CPP_GREATER_EQ,    ">=")                   \
  93   OP(CPP_LESS_EQ,       "<=")                   \
  94 \
  95   OP(CPP_PLUS_EQ,       "+=")   /* math */      \
  96   OP(CPP_MINUS_EQ,      "-=")                   \
  97   OP(CPP_MULT_EQ,       "*=")                   \
  98   OP(CPP_DIV_EQ,        "/=")                   \
  99   OP(CPP_MOD_EQ,        "%=")                   \
 100   OP(CPP_AND_EQ,        "&=")   /* bit ops */   \
 101   OP(CPP_OR_EQ,         "|=")                   \
 102   OP(CPP_XOR_EQ,        "^=")                   \
 103   OP(CPP_RSHIFT_EQ,     ">>=")                  \
 104   OP(CPP_LSHIFT_EQ,     "<<=")                  \
 105   OP(CPP_MIN_EQ,        "<?=")  /* extension */ \
 106   OP(CPP_MAX_EQ,        ">?=")                  \
 107   /* Digraphs together, beginning with CPP_FIRST_DIGRAPH.  */   \
 108   OP(CPP_HASH,          "#")    /* digraphs */  \
 109   OP(CPP_PASTE,         "##")                   \
 110   OP(CPP_OPEN_SQUARE,   "[")                    \
 111   OP(CPP_CLOSE_SQUARE,  "]")                    \
 112   OP(CPP_OPEN_BRACE,    "{")                    \
 113   OP(CPP_CLOSE_BRACE,   "}")                    \
 114   /* The remainder of the punctuation.  Order is not significant.  */   \
 115   OP(CPP_SEMICOLON,     ";")    /* structure */ \
 116   OP(CPP_ELLIPSIS,      "...")                  \
 117   OP(CPP_PLUS_PLUS,     "++")   /* increment */ \
 118   OP(CPP_MINUS_MINUS,   "--")                   \
 119   OP(CPP_DEREF,         "->")   /* accessors */ \
 120   OP(CPP_DOT,           ".")                    \
 121   OP(CPP_SCOPE,         "::")                   \
 122   OP(CPP_DEREF_STAR,    "->*")                  \
 123   OP(CPP_DOT_STAR,      ".*")                   \
 124   OP(CPP_ATSIGN,        "@")  /* used in Objective C */ \
 125 \
 126   TK(CPP_NAME,          SPELL_IDENT)    /* word */                      \
 127   TK(CPP_INT,           SPELL_STRING)   /* 23 */                        \
 128   TK(CPP_FLOAT,         SPELL_STRING)   /* 3.14159 */                   \
 129   TK(CPP_NUMBER,        SPELL_STRING)   /* 34_be+ta  */                 \
 130 \
 131   TK(CPP_CHAR,          SPELL_STRING)   /* 'char' */                    \
 132   TK(CPP_WCHAR,         SPELL_STRING)   /* L'char' */                   \
 133   TK(CPP_OTHER,         SPELL_CHAR)     /* stray punctuation */         \
 134 \
 135   TK(CPP_STRING,        SPELL_STRING)   /* "string" */                  \
 136   TK(CPP_WSTRING,       SPELL_STRING)   /* L"string" */                 \
 137   TK(CPP_HEADER_NAME,   SPELL_STRING)   /* <stdio.h> in #include */     \
 138 \
 139   TK(CPP_COMMENT,       SPELL_STRING)   /* Only if output comments.  */ \
 140   TK(CPP_MACRO_ARG,     SPELL_NONE)     /* Macro argument.  */          \
 141   OP(CPP_EOF,           "EOL")          /* End of line or file.  */
 142
 143 #define OP(e, s) e,
 144 #define TK(e, s) e,
 145 enum cpp_ttype
 146 {
 147   TTYPE_TABLE
 148   N_TTYPES
 149 };
 150 #undef OP
 151 #undef TK
 152
 153 /* C language kind, used when calling cpp_reader_init.  */
 154 enum c_lang {CLK_GNUC89 = 0, CLK_GNUC99, CLK_STDC89, CLK_STDC94, CLK_STDC99,
 155              CLK_GNUCXX, CLK_CXX98, CLK_OBJC, CLK_OBJCXX, CLK_ASM};
 156
 157 /* Payload of a NUMBER, FLOAT, STRING, or COMMENT token.  */
 158 struct cpp_string
 159 {
 160   unsigned int len;
 161   const unsigned char *text;
 162 };
 163
 164 /* Flags for the cpp_token structure.  */
 165 #define PREV_WHITE      (1 << 0) /* If whitespace before this token.  */
 166 #define DIGRAPH         (1 << 1) /* If it was a digraph.  */
 167 #define STRINGIFY_ARG   (1 << 2) /* If macro argument to be stringified.  */
 168 #define PASTE_LEFT      (1 << 3) /* If on LHS of a ## operator.  */
 169 #define NAMED_OP        (1 << 4) /* C++ named operators.  */
 170 #define NO_EXPAND       (1 << 5) /* Do not macro-expand this token.  */
 171 #define AVOID_LPASTE    (1 << 6) /* Check left for accidental pastes.  */
 172
 173 /* A preprocessing token.  This has been carefully packed and should
 174    occupy 12 bytes on 32-bit hosts and 16 bytes on 64-bit hosts.  */
 175 struct cpp_token
 176 {
 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     struct cpp_string str;      /* A string, or number.  */
 184     unsigned int arg_no;        /* Argument no. for a CPP_MACRO_ARG.  */
 185     unsigned char c;            /* Character represented by CPP_OTHER.  */
 186   } val;
 187 };
 188
 189 /* The position of a token in the current file.  */
 190 struct cpp_lexer_pos
 191 {
 192   unsigned int line;
 193   unsigned int output_line;
 194   unsigned short col;
 195 };
 196
 197 typedef struct cpp_token_with_pos cpp_token_with_pos;
 198 struct cpp_token_with_pos
 199 {
 200   cpp_token token;
 201   cpp_lexer_pos pos;
 202 };
 203
 204 /* Token lookahead.  */
 205 struct cpp_lookahead
 206 {
 207   struct cpp_lookahead *next;
 208   cpp_token_with_pos *tokens;
 209   cpp_lexer_pos pos;
 210   unsigned int cur, count, cap;
 211 };
 212
 213 /* A standalone character.  We may want to make it unsigned for the
 214    same reason we use unsigned char - to avoid signedness issues.  */
 215 typedef int cppchar_t;
 216
 217 /* Values for opts.dump_macros.
 218   dump_only means inhibit output of the preprocessed text
 219              and instead output the definitions of all user-defined
 220              macros in a form suitable for use as input to cpp.
 221    dump_names means pass #define and the macro name through to output.
 222    dump_definitions means pass the whole definition (plus #define) through
 223 */
 224 enum { dump_none = 0, dump_only, dump_names, dump_definitions };
 225
 226 /* This structure is nested inside struct cpp_reader, and
 227    carries all the options visible to the command line.  */
 228 struct cpp_options
 229 {
 230   /* Name of input and output files.  */
 231   const char *in_fname;
 232   const char *out_fname;
 233
 234   /* Characters between tab stops.  */
 235   unsigned int tabstop;
 236
 237   /* Pending options - -D, -U, -A, -I, -ixxx. */
 238   struct cpp_pending *pending;
 239
 240   /* File name which deps are being written to.  This is 0 if deps are
 241      being written to stdout.  */
 242   const char *deps_file;
 243
 244   /* Search paths for include files.  */
 245   struct search_path *quote_include;    /* "" */
 246   struct search_path *bracket_include;  /* <> */
 247
 248   /* Map between header names and file names, used only on DOS where
 249      file names are limited in length.  */
 250   struct file_name_map_list *map_list;
 251
 252   /* Directory prefix that should replace `/usr/lib/gcc-lib/TARGET/VERSION'
 253      in the standard include file directories.  */
 254   const char *include_prefix;
 255   unsigned int include_prefix_len;
 256
 257   /* -fleading_underscore sets this to "_".  */
 258   const char *user_label_prefix;
 259
 260   /* The language we're preprocessing.  */
 261   enum c_lang lang;
 262
 263   /* Non-0 means -v, so print the full set of include dirs.  */
 264   unsigned char verbose;
 265
 266   /* Nonzero means use extra default include directories for C++.  */
 267   unsigned char cplusplus;
 268
 269   /* Nonzero means handle cplusplus style comments */
 270   unsigned char cplusplus_comments;
 271
 272   /* Nonzero means handle #import, for objective C.  */
 273   unsigned char objc;
 274
 275   /* Nonzero means don't copy comments into the output file.  */
 276   unsigned char discard_comments;
 277
 278   /* Nonzero means process the ISO trigraph sequences.  */
 279   unsigned char trigraphs;
 280
 281   /* Nonzero means process the ISO digraph sequences.  */
 282   unsigned char digraphs;
 283
 284   /* Nonzero means to allow hexadecimal floats and LL suffixes.  */
 285   unsigned char extended_numbers;
 286
 287   /* Nonzero means print the names of included files rather than the
 288      preprocessed output.  1 means just the #include "...", 2 means
 289      #include <...> as well.  */
 290   unsigned char print_deps;
 291
 292   /* Nonzero if phony targets are created for each header.  */
 293   unsigned char deps_phony_targets;
 294
 295   /* Nonzero if missing .h files in -M output are assumed to be
 296      generated files and not errors.  */
 297   unsigned char print_deps_missing_files;
 298
 299   /* If true, fopen (deps_file, "a") else fopen (deps_file, "w"). */
 300   unsigned char print_deps_append;
 301
 302   /* Nonzero means print names of header files (-H).  */
 303   unsigned char print_include_names;
 304
 305   /* Nonzero means cpp_pedwarn causes a hard error.  */
 306   unsigned char pedantic_errors;
 307
 308   /* Nonzero means don't print warning messages.  */
 309   unsigned char inhibit_warnings;
 310
 311   /* Nonzero means don't suppress warnings from system headers.  */
 312   unsigned char warn_system_headers;
 313
 314   /* Nonzero means don't print error messages.  Has no option to
 315      select it, but can be set by a user of cpplib (e.g. fix-header).  */
 316   unsigned char inhibit_errors;
 317
 318   /* Nonzero means warn if slash-star appears in a comment.  */
 319   unsigned char warn_comments;
 320
 321   /* Nonzero means warn if there are any trigraphs.  */
 322   unsigned char warn_trigraphs;
 323
 324   /* Nonzero means warn if #import is used.  */
 325   unsigned char warn_import;
 326
 327   /* Nonzero means warn about various incompatibilities with
 328      traditional C.  */
 329   unsigned char warn_traditional;
 330
 331   /* Nonzero means turn warnings into errors.  */
 332   unsigned char warnings_are_errors;
 333
 334   /* Nonzero causes output not to be done, but directives such as
 335      #define that have side effects are still obeyed.  */
 336   unsigned char no_output;
 337
 338   /* Nonzero means we should look for header.gcc files that remap file
 339      names.  */
 340   unsigned char remap;
 341
 342   /* Nonzero means don't output line number information.  */
 343   unsigned char no_line_commands;
 344
 345   /* Nonzero means -I- has been seen, so don't look for #include "foo"
 346      the source-file directory.  */
 347   unsigned char ignore_srcdir;
 348
 349   /* Zero means dollar signs are punctuation. */
 350   unsigned char dollars_in_ident;
 351
 352   /* Nonzero means warn if undefined identifiers are evaluated in an #if.  */
 353   unsigned char warn_undef;
 354
 355   /* Nonzero for the 1999 C Standard, including corrigenda and amendments.  */
 356   unsigned char c99;
 357
 358   /* Nonzero means give all the error messages the ANSI standard requires.  */
 359   unsigned char pedantic;
 360
 361   /* Nonzero means we're looking at already preprocessed code, so don't
 362      bother trying to do macro expansion and whatnot.  */
 363   unsigned char preprocessed;
 364
 365   /* Nonzero disables all the standard directories for headers.  */
 366   unsigned char no_standard_includes;
 367
 368   /* Nonzero disables the C++-specific standard directories for headers.  */
 369   unsigned char no_standard_cplusplus_includes;
 370
 371   /* Nonzero means dump macros in some fashion - see above.  */
 372   unsigned char dump_macros;
 373
 374   /* Nonzero means pass #include lines through to the output.  */
 375   unsigned char dump_includes;
 376
 377   /* Print column number in error messages.  */
 378   unsigned char show_column;
 379
 380   /* Treat C++ alternate operator names special.  */
 381   unsigned char operator_names;
 382
 383   /* True if --help, --version or --target-help appeared in the
 384      options.  Stand-alone CPP should then bail out after option
 385      parsing; drivers might want to continue printing help.  */
 386   unsigned char help_only;
 387 };
 388
 389 /* This structure is passed to the call back when changing file.  */
 390 enum cpp_fc_reason {FC_ENTER = 0, FC_LEAVE, FC_RENAME};
 391
 392 struct cpp_file_loc
 393 {
 394   const char *filename;
 395   unsigned int lineno;
 396 };
 397
 398 typedef struct cpp_file_change cpp_file_change;
 399 struct cpp_file_change
 400 {
 401   struct cpp_file_loc from;     /* Line of #include or #line.  */
 402   struct cpp_file_loc to;       /* Line after #include or #line, or start.  */
 403   enum cpp_fc_reason reason;    /* Reason for change.  */
 404   unsigned char sysp;           /* Nonzero if system header.  */
 405   unsigned char externc;        /* Nonzero if wrapper needed.  */
 406 };
 407
 408 /* Call backs.  */
 409 struct cpp_callbacks
 410 {
 411     void (*file_change) PARAMS ((cpp_reader *, const cpp_file_change *));
 412     void (*include) PARAMS ((cpp_reader *, const unsigned char *,
 413                              const cpp_token *));
 414     void (*define) PARAMS ((cpp_reader *, cpp_hashnode *));
 415     void (*undef) PARAMS ((cpp_reader *, cpp_hashnode *));
 416     void (*poison) PARAMS ((cpp_reader *));
 417     void (*ident) PARAMS ((cpp_reader *, const cpp_string *));
 418     void (*def_pragma) PARAMS ((cpp_reader *));
 419 };
 420
 421 #define CPP_FATAL_LIMIT 1000
 422 /* True if we have seen a "fatal" error. */
 423 #define CPP_FATAL_ERRORS(PFILE) (cpp_errors (PFILE) >= CPP_FATAL_LIMIT)
 424
 425 /* Name under which this program was invoked.  */
 426 extern const char *progname;
 427
 428 /* Where does this buffer come from?  A faked include, a source file,
 429    a builtin macro, a command-line option, or a _Pragma operator.  */
 430 enum cpp_buffer_type {BUF_FAKE, BUF_FILE, BUF_BUILTIN,
 431                       BUF_CL_OPTION, BUF_PRAGMA};
 432
 433 /* The structure of a node in the hash table.  The hash table has
 434    entries for all identifiers: either macros defined by #define
 435    commands (type NT_MACRO), assertions created with #assert
 436    (NT_ASSERTION), or neither of the above (NT_VOID).  Builtin macros
 437    like __LINE__ are flagged NODE_BUILTIN.  Poisioned identifiers are
 438    flagged NODE_POISONED.  NODE_OPERATOR (C++ only) indicates an
 439    identifier that behaves like an operator such as "xor".
 440    NODE_DIAGNOSTIC is for speed in lex_token: it indicates a
 441    diagnostic may be required for this node.  Currently this only
 442    applies to __VA_ARGS__ and poisoned identifiers.  */
 443
 444 /* Hash node flags.  */
 445 #define NODE_OPERATOR   (1 << 0)        /* C++ named operator.  */
 446 #define NODE_POISONED   (1 << 1)        /* Poisoned identifier.  */
 447 #define NODE_BUILTIN    (1 << 2)        /* Builtin macro.  */
 448 #define NODE_DIAGNOSTIC (1 << 3)        /* Possible diagnostic when lexed.  */
 449 #define NODE_WARN       (1 << 4)        /* Warn if redefined or undefined.  */
 450
 451 /* Different flavors of hash node.  */
 452 enum node_type
 453 {
 454   NT_VOID = 0,     /* No definition yet.  */
 455   NT_MACRO,        /* A macro of some form.  */
 456   NT_ASSERTION     /* Predicate for #assert.  */
 457 };
 458
 459 /* Different flavors of builtin macro.  */
 460 enum builtin_type
 461 {
 462   BT_SPECLINE = 0,              /* `__LINE__' */
 463   BT_DATE,                      /* `__DATE__' */
 464   BT_FILE,                      /* `__FILE__' */
 465   BT_BASE_FILE,                 /* `__BASE_FILE__' */
 466   BT_INCLUDE_LEVEL,             /* `__INCLUDE_LEVEL__' */
 467   BT_TIME,                      /* `__TIME__' */
 468   BT_STDC                       /* `__STDC__' */
 469 };
 470
 471 #define CPP_HASHNODE(HNODE)     ((cpp_hashnode *) (HNODE))
 472 #define HT_NODE(NODE)           ((ht_identifier *) (NODE))
 473 #define NODE_LEN(NODE)          HT_LEN (&(NODE)->ident)
 474 #define NODE_NAME(NODE)         HT_STR (&(NODE)->ident)
 475
 476 /* The common part of an identifier node shared amongst all 3 C front
 477    ends.  Also used to store CPP identifiers, which are a superset of
 478    identifiers in the grammatical sense.  */
 479 struct cpp_hashnode
 480 {
 481   struct ht_identifier ident;
 482   unsigned short arg_index;             /* Macro argument index.  */
 483   unsigned char directive_index;        /* Index into directive table.  */
 484   unsigned char rid_code;               /* Rid code - for front ends.  */
 485   ENUM_BITFIELD(node_type) type : 8;    /* CPP node type.  */
 486   unsigned char flags;                  /* CPP flags.  */
 487
 488   union
 489   {
 490     cpp_macro *macro;                   /* If a macro.  */
 491     struct answer *answers;             /* Answers to an assertion.  */
 492     enum cpp_ttype operator;            /* Code for a named operator.  */
 493     enum builtin_type builtin;          /* Code for a builtin macro.  */
 494   } value;
 495 };
 496
 497 /* Call this first to get a handle to pass to other functions.  If you
 498    want cpplib to manage its own hashtable, pass in a NULL pointer.
 499    Or you can pass in an initialised hash table that cpplib will use;
 500    this technique is used by the C front ends.  */
 501 extern cpp_reader *cpp_create_reader PARAMS ((struct ht *,
 502                                               enum c_lang));
 503
 504 /* Call this to release the handle.  Any use of the handle after this
 505    function returns is invalid.  Returns cpp_errors (pfile).  */
 506 extern int cpp_destroy PARAMS ((cpp_reader *));
 507
 508 /* Call these to get pointers to the options and callback structures
 509    for a given reader.  These pointers are good until you call
 510    cpp_finish on that reader.  You can either edit the callbacks
 511    through the pointer returned from cpp_get_callbacks, or set them
 512    with cpp_set_callbacks.  */
 513 extern cpp_options *cpp_get_options PARAMS ((cpp_reader *));
 514 extern cpp_callbacks *cpp_get_callbacks PARAMS ((cpp_reader *));
 515 extern void cpp_set_callbacks PARAMS ((cpp_reader *, cpp_callbacks *));
 516
 517 /* Now call cpp_handle_option[s] to handle 1[or more] switches.  The
 518    return value is the number of arguments used.  If
 519    cpp_handle_options returns without using all arguments, it couldn't
 520    understand the next switch.  When there are no switches left, you
 521    must call cpp_post_options before calling cpp_start_read.  Only
 522    after cpp_post_options are the contents of the cpp_options
 523    structure reliable.  */
 524 extern int cpp_handle_options PARAMS ((cpp_reader *, int, char **));
 525 extern int cpp_handle_option PARAMS ((cpp_reader *, int, char **));
 526 extern void cpp_post_options PARAMS ((cpp_reader *));
 527
 528 /* Error count.  */
 529 extern unsigned int cpp_errors PARAMS ((cpp_reader *));
 530
 531 extern unsigned int cpp_token_len PARAMS ((const cpp_token *));
 532 extern unsigned char *cpp_token_as_text PARAMS ((cpp_reader *,
 533                                                  const cpp_token *));
 534 extern unsigned char *cpp_spell_token PARAMS ((cpp_reader *, const cpp_token *,
 535                                                unsigned char *));
 536 extern void cpp_register_pragma PARAMS ((cpp_reader *,
 537                                          const char *, const char *,
 538                                          void (*) PARAMS ((cpp_reader *))));
 539 extern void cpp_register_pragma_space PARAMS ((cpp_reader *, const char *));
 540
 541 extern int cpp_start_read PARAMS ((cpp_reader *, const char *));
 542 extern void cpp_finish PARAMS ((cpp_reader *));
 543 extern int cpp_avoid_paste PARAMS ((cpp_reader *, const cpp_token *,
 544                                     const cpp_token *));
 545 extern enum cpp_ttype cpp_can_paste PARAMS ((cpp_reader *, const cpp_token *,
 546                                              const cpp_token *, int *));
 547 extern void cpp_get_token PARAMS ((cpp_reader *, cpp_token *));
 548 extern const cpp_lexer_pos *cpp_get_line PARAMS ((cpp_reader *));
 549 extern const unsigned char *cpp_macro_definition PARAMS ((cpp_reader *,
 550                                                   const cpp_hashnode *));
 551
 552 /* Evaluate a CPP_CHAR or CPP_WCHAR token.  */
 553 extern HOST_WIDE_INT
 554 cpp_interpret_charconst PARAMS ((cpp_reader *, const cpp_token *,
 555                                  int, int, unsigned int *));
 556
 557 extern void cpp_define PARAMS ((cpp_reader *, const char *));
 558 extern void cpp_assert PARAMS ((cpp_reader *, const char *));
 559 extern void cpp_undef  PARAMS ((cpp_reader *, const char *));
 560 extern void cpp_unassert PARAMS ((cpp_reader *, const char *));
 561
 562 extern cpp_buffer *cpp_push_buffer PARAMS ((cpp_reader *,
 563                                             const unsigned char *, size_t,
 564                                             enum cpp_buffer_type,
 565                                             const char *));
 566 extern cpp_buffer *cpp_pop_buffer PARAMS ((cpp_reader *));
 567 extern int cpp_defined PARAMS ((cpp_reader *, const unsigned char *, int));
 568
 569 /* N.B. The error-message-printer prototypes have not been nicely
 570    formatted because exgettext needs to see 'msgid' on the same line
 571    as the name of the function in order to work properly.  Only the
 572    string argument gets a name in an effort to keep the lines from
 573    getting ridiculously oversized.  */
 574
 575 extern void cpp_ice PARAMS ((cpp_reader *, const char *msgid, ...))
 576   ATTRIBUTE_PRINTF_2;
 577 extern void cpp_fatal PARAMS ((cpp_reader *, const char *msgid, ...))
 578   ATTRIBUTE_PRINTF_2;
 579 extern void cpp_error PARAMS ((cpp_reader *, const char *msgid, ...))
 580   ATTRIBUTE_PRINTF_2;
 581 extern void cpp_warning PARAMS ((cpp_reader *, const char *msgid, ...))
 582   ATTRIBUTE_PRINTF_2;
 583 extern void cpp_pedwarn PARAMS ((cpp_reader *, const char *msgid, ...))
 584   ATTRIBUTE_PRINTF_2;
 585 extern void cpp_notice PARAMS ((cpp_reader *, const char *msgid, ...))
 586   ATTRIBUTE_PRINTF_2;
 587 extern void cpp_error_with_line PARAMS ((cpp_reader *, int, int, const char *msgid, ...))
 588   ATTRIBUTE_PRINTF_4;
 589 extern void cpp_warning_with_line PARAMS ((cpp_reader *, int, int, const char *msgid, ...))
 590   ATTRIBUTE_PRINTF_4;
 591 extern void cpp_pedwarn_with_line PARAMS ((cpp_reader *, int, int, const char *msgid, ...))
 592   ATTRIBUTE_PRINTF_4;
 593 extern void cpp_pedwarn_with_file_and_line PARAMS ((cpp_reader *, const char *, int, int, const char *msgid, ...))
 594   ATTRIBUTE_PRINTF_5;
 595 extern void cpp_error_from_errno PARAMS ((cpp_reader *, const char *));
 596 extern void cpp_notice_from_errno PARAMS ((cpp_reader *, const char *));
 597
 598 /* In cpplex.c */
 599 extern int cpp_ideq                     PARAMS ((const cpp_token *,
 600                                                  const char *));
 601 extern void cpp_output_line             PARAMS ((cpp_reader *, FILE *));
 602 extern void cpp_output_token            PARAMS ((const cpp_token *, FILE *));
 603 extern const char *cpp_type2name        PARAMS ((enum cpp_ttype));
 604 extern unsigned int cpp_parse_escape    PARAMS ((cpp_reader *,
 605                                                  const unsigned char **,
 606                                                  const unsigned char *,
 607                                                  unsigned HOST_WIDE_INT, int));
 608
 609 /* In cpphash.c */
 610
 611 /* Lookup an identifier in the hashtable.  Puts the identifier in the
 612    table if it is not already there.  */
 613 extern cpp_hashnode *cpp_lookup         PARAMS ((cpp_reader *,
 614                                                  const unsigned char *,
 615                                                  unsigned int));
 616
 617 typedef int (*cpp_cb) PARAMS ((cpp_reader *, cpp_hashnode *, void *));
 618 extern void cpp_forall_identifiers      PARAMS ((cpp_reader *,
 619                                                  cpp_cb, void *));
 620
 621 /* In cppmacro.c */
 622 extern void cpp_scan_buffer_nooutput    PARAMS ((cpp_reader *, int));
 623 extern void cpp_start_lookahead         PARAMS ((cpp_reader *));
 624 extern void cpp_stop_lookahead          PARAMS ((cpp_reader *, int));
 625 extern int  cpp_sys_macro_p             PARAMS ((cpp_reader *));
 626
 627 /* In cppfiles.c */
 628 extern int cpp_included PARAMS ((cpp_reader *, const char *));
 629 extern void cpp_make_system_header PARAMS ((cpp_reader *, int, int));
 630
 631 #ifdef __cplusplus
 632 }
 633 #endif
 634
 635 #endif /* ! GCC_CPPLIB_H */