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_STRING)   /* 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_STRING)   /* Only if output comments.  */ \
 136   TK(CPP_MACRO_ARG,     SPELL_NONE)     /* Macro argument.  */          \
 137   OP(CPP_EOF,           "EOL")          /* End of line or file.  */
 138
 139 #define OP(e, s) e,
 140 #define TK(e, s) e,
 141 enum cpp_ttype
 142 {
 143   TTYPE_TABLE
 144   N_TTYPES
 145 };
 146 #undef OP
 147 #undef TK
 148
 149 /* C language kind, used when calling cpp_reader_init.  */
 150 enum c_lang {CLK_GNUC89 = 0, CLK_GNUC99, CLK_STDC89, CLK_STDC94, CLK_STDC99,
 151              CLK_GNUCXX, CLK_CXX98, CLK_OBJC, CLK_OBJCXX, CLK_ASM};
 152
 153 /* Payload of a NUMBER, FLOAT, STRING, or COMMENT token.  */
 154 struct cpp_string
 155 {
 156   unsigned int len;
 157   const unsigned char *text;
 158 };
 159
 160 /* Flags for the cpp_token structure.  */
 161 #define PREV_WHITE      (1 << 0) /* If whitespace before this token.  */
 162 #define DIGRAPH         (1 << 1) /* If it was a digraph.  */
 163 #define STRINGIFY_ARG   (1 << 2) /* If macro argument to be stringified.  */
 164 #define PASTE_LEFT      (1 << 3) /* If on LHS of a ## operator.  */
 165 #define NAMED_OP        (1 << 4) /* C++ named operators.  */
 166 #define NO_EXPAND       (1 << 5) /* Do not macro-expand this token.  */
 167 #define AVOID_LPASTE    (1 << 6) /* Check left for accidental pastes.  */
 168 #define BOL             (1 << 7) /* Token at beginning of line.  */
 169
 170 /* A preprocessing token.  This has been carefully packed and should
 171    occupy 12 bytes on 32-bit hosts and 16 bytes on 64-bit hosts.  */
 172 struct cpp_token
 173 {
 174   unsigned int line;            /* Logical line of first char of token.  */
 175   unsigned short col;           /* Column of first char of token.  */
 176   ENUM_BITFIELD(cpp_ttype) type : CHAR_BIT;  /* token type */
 177   unsigned char flags;          /* flags - see above */
 178
 179   union
 180   {
 181     cpp_hashnode *node;         /* An identifier.  */
 182     struct cpp_string str;      /* A string, or number.  */
 183     unsigned int arg_no;        /* Argument no. for a CPP_MACRO_ARG.  */
 184     unsigned char c;            /* Character represented by CPP_OTHER.  */
 185   } val;
 186 };
 187
 188 /* A standalone character.  We may want to make it unsigned for the
 189    same reason we use unsigned char - to avoid signedness issues.  */
 190 typedef int cppchar_t;
 191
 192 /* Values for opts.dump_macros.
 193   dump_only means inhibit output of the preprocessed text
 194              and instead output the definitions of all user-defined
 195              macros in a form suitable for use as input to cpp.
 196    dump_names means pass #define and the macro name through to output.
 197    dump_definitions means pass the whole definition (plus #define) through
 198 */
 199 enum { dump_none = 0, dump_only, dump_names, dump_definitions };
 200
 201 /* This structure is nested inside struct cpp_reader, and
 202    carries all the options visible to the command line.  */
 203 struct cpp_options
 204 {
 205   /* Name of input and output files.  */
 206   const char *in_fname;
 207   const char *out_fname;
 208
 209   /* Characters between tab stops.  */
 210   unsigned int tabstop;
 211
 212   /* Pending options - -D, -U, -A, -I, -ixxx. */
 213   struct cpp_pending *pending;
 214
 215   /* File name which deps are being written to.  This is 0 if deps are
 216      being written to stdout.  */
 217   const char *deps_file;
 218
 219   /* Search paths for include files.  */
 220   struct search_path *quote_include;    /* "" */
 221   struct search_path *bracket_include;  /* <> */
 222
 223   /* Map between header names and file names, used only on DOS where
 224      file names are limited in length.  */
 225   struct file_name_map_list *map_list;
 226
 227   /* Directory prefix that should replace `/usr/lib/gcc-lib/TARGET/VERSION'
 228      in the standard include file directories.  */
 229   const char *include_prefix;
 230   unsigned int include_prefix_len;
 231
 232   /* -fleading_underscore sets this to "_".  */
 233   const char *user_label_prefix;
 234
 235   /* The language we're preprocessing.  */
 236   enum c_lang lang;
 237
 238   /* Non-0 means -v, so print the full set of include dirs.  */
 239   unsigned char verbose;
 240
 241   /* Nonzero means use extra default include directories for C++.  */
 242   unsigned char cplusplus;
 243
 244   /* Nonzero means handle cplusplus style comments */
 245   unsigned char cplusplus_comments;
 246
 247   /* Nonzero means handle #import, for objective C.  */
 248   unsigned char objc;
 249
 250   /* Nonzero means don't copy comments into the output file.  */
 251   unsigned char discard_comments;
 252
 253   /* Nonzero means process the ISO trigraph sequences.  */
 254   unsigned char trigraphs;
 255
 256   /* Nonzero means process the ISO digraph sequences.  */
 257   unsigned char digraphs;
 258
 259   /* Nonzero means to allow hexadecimal floats and LL suffixes.  */
 260   unsigned char extended_numbers;
 261
 262   /* Nonzero means print the names of included files rather than the
 263      preprocessed output.  1 means just the #include "...", 2 means
 264      #include <...> as well.  */
 265   unsigned char print_deps;
 266
 267   /* Nonzero if phony targets are created for each header.  */
 268   unsigned char deps_phony_targets;
 269
 270   /* Nonzero if missing .h files in -M output are assumed to be
 271      generated files and not errors.  */
 272   unsigned char print_deps_missing_files;
 273
 274   /* If true, fopen (deps_file, "a") else fopen (deps_file, "w"). */
 275   unsigned char print_deps_append;
 276
 277   /* Nonzero means print names of header files (-H).  */
 278   unsigned char print_include_names;
 279
 280   /* Nonzero means cpp_pedwarn causes a hard error.  */
 281   unsigned char pedantic_errors;
 282
 283   /* Nonzero means don't print warning messages.  */
 284   unsigned char inhibit_warnings;
 285
 286   /* Nonzero means don't suppress warnings from system headers.  */
 287   unsigned char warn_system_headers;
 288
 289   /* Nonzero means don't print error messages.  Has no option to
 290      select it, but can be set by a user of cpplib (e.g. fix-header).  */
 291   unsigned char inhibit_errors;
 292
 293   /* Nonzero means warn if slash-star appears in a comment.  */
 294   unsigned char warn_comments;
 295
 296   /* Nonzero means warn if there are any trigraphs.  */
 297   unsigned char warn_trigraphs;
 298
 299   /* Nonzero means warn if #import is used.  */
 300   unsigned char warn_import;
 301
 302   /* Nonzero means warn about various incompatibilities with
 303      traditional C.  */
 304   unsigned char warn_traditional;
 305
 306   /* Nonzero means turn warnings into errors.  */
 307   unsigned char warnings_are_errors;
 308
 309   /* Nonzero causes output not to be done, but directives such as
 310      #define that have side effects are still obeyed.  */
 311   unsigned char no_output;
 312
 313   /* Nonzero means we should look for header.gcc files that remap file
 314      names.  */
 315   unsigned char remap;
 316
 317   /* Nonzero means don't output line number information.  */
 318   unsigned char no_line_commands;
 319
 320   /* Nonzero means -I- has been seen, so don't look for #include "foo"
 321      the source-file directory.  */
 322   unsigned char ignore_srcdir;
 323
 324   /* Zero means dollar signs are punctuation. */
 325   unsigned char dollars_in_ident;
 326
 327   /* Nonzero means warn if undefined identifiers are evaluated in an #if.  */
 328   unsigned char warn_undef;
 329
 330   /* Nonzero for the 1999 C Standard, including corrigenda and amendments.  */
 331   unsigned char c99;
 332
 333   /* Nonzero means give all the error messages the ANSI standard requires.  */
 334   unsigned char pedantic;
 335
 336   /* Nonzero means we're looking at already preprocessed code, so don't
 337      bother trying to do macro expansion and whatnot.  */
 338   unsigned char preprocessed;
 339
 340   /* Nonzero disables all the standard directories for headers.  */
 341   unsigned char no_standard_includes;
 342
 343   /* Nonzero disables the C++-specific standard directories for headers.  */
 344   unsigned char no_standard_cplusplus_includes;
 345
 346   /* Nonzero means dump macros in some fashion - see above.  */
 347   unsigned char dump_macros;
 348
 349   /* Nonzero means pass #include lines through to the output.  */
 350   unsigned char dump_includes;
 351
 352   /* Print column number in error messages.  */
 353   unsigned char show_column;
 354
 355   /* Treat C++ alternate operator names special.  */
 356   unsigned char operator_names;
 357
 358   /* True if --help, --version or --target-help appeared in the
 359      options.  Stand-alone CPP should then bail out after option
 360      parsing; drivers might want to continue printing help.  */
 361   unsigned char help_only;
 362 };
 363
 364 /* Call backs.  */
 365 struct cpp_callbacks
 366 {
 367   /* Called when a new line of preprocessed output is started.  */
 368   void (*line_change) PARAMS ((cpp_reader *, const cpp_token *, int));
 369   void (*file_change) PARAMS ((cpp_reader *, const struct line_map *));
 370   void (*include) PARAMS ((cpp_reader *, unsigned int,
 371                            const unsigned char *, const cpp_token *));
 372   void (*define) PARAMS ((cpp_reader *, unsigned int, cpp_hashnode *));
 373   void (*undef) PARAMS ((cpp_reader *, unsigned int, cpp_hashnode *));
 374   void (*ident) PARAMS ((cpp_reader *, unsigned int, const cpp_string *));
 375   void (*def_pragma) PARAMS ((cpp_reader *, unsigned int));
 376 };
 377
 378 #define CPP_FATAL_LIMIT 1000
 379 /* True if we have seen a "fatal" error. */
 380 #define CPP_FATAL_ERRORS(PFILE) (cpp_errors (PFILE) >= CPP_FATAL_LIMIT)
 381
 382 /* Name under which this program was invoked.  */
 383 extern const char *progname;
 384
 385 /* The structure of a node in the hash table.  The hash table has
 386    entries for all identifiers: either macros defined by #define
 387    commands (type NT_MACRO), assertions created with #assert
 388    (NT_ASSERTION), or neither of the above (NT_VOID).  Builtin macros
 389    like __LINE__ are flagged NODE_BUILTIN.  Poisioned identifiers are
 390    flagged NODE_POISONED.  NODE_OPERATOR (C++ only) indicates an
 391    identifier that behaves like an operator such as "xor".
 392    NODE_DIAGNOSTIC is for speed in lex_token: it indicates a
 393    diagnostic may be required for this node.  Currently this only
 394    applies to __VA_ARGS__ and poisoned identifiers.  */
 395
 396 /* Hash node flags.  */
 397 #define NODE_OPERATOR   (1 << 0)        /* C++ named operator.  */
 398 #define NODE_POISONED   (1 << 1)        /* Poisoned identifier.  */
 399 #define NODE_BUILTIN    (1 << 2)        /* Builtin macro.  */
 400 #define NODE_DIAGNOSTIC (1 << 3)        /* Possible diagnostic when lexed.  */
 401 #define NODE_WARN       (1 << 4)        /* Warn if redefined or undefined.  */
 402
 403 /* Different flavors of hash node.  */
 404 enum node_type
 405 {
 406   NT_VOID = 0,     /* No definition yet.  */
 407   NT_MACRO,        /* A macro of some form.  */
 408   NT_ASSERTION     /* Predicate for #assert.  */
 409 };
 410
 411 /* Different flavors of builtin macro.  */
 412 enum builtin_type
 413 {
 414   BT_SPECLINE = 0,              /* `__LINE__' */
 415   BT_DATE,                      /* `__DATE__' */
 416   BT_FILE,                      /* `__FILE__' */
 417   BT_BASE_FILE,                 /* `__BASE_FILE__' */
 418   BT_INCLUDE_LEVEL,             /* `__INCLUDE_LEVEL__' */
 419   BT_TIME,                      /* `__TIME__' */
 420   BT_STDC                       /* `__STDC__' */
 421 };
 422
 423 #define CPP_HASHNODE(HNODE)     ((cpp_hashnode *) (HNODE))
 424 #define HT_NODE(NODE)           ((ht_identifier *) (NODE))
 425 #define NODE_LEN(NODE)          HT_LEN (&(NODE)->ident)
 426 #define NODE_NAME(NODE)         HT_STR (&(NODE)->ident)
 427
 428 /* The common part of an identifier node shared amongst all 3 C front
 429    ends.  Also used to store CPP identifiers, which are a superset of
 430    identifiers in the grammatical sense.  */
 431 struct cpp_hashnode
 432 {
 433   struct ht_identifier ident;
 434   unsigned short arg_index;             /* Macro argument index.  */
 435   unsigned char directive_index;        /* Index into directive table.  */
 436   unsigned char rid_code;               /* Rid code - for front ends.  */
 437   ENUM_BITFIELD(node_type) type : 8;    /* CPP node type.  */
 438   unsigned char flags;                  /* CPP flags.  */
 439
 440   union
 441   {
 442     cpp_macro *macro;                   /* If a macro.  */
 443     struct answer *answers;             /* Answers to an assertion.  */
 444     enum cpp_ttype operator;            /* Code for a named operator.  */
 445     enum builtin_type builtin;          /* Code for a builtin macro.  */
 446   } value;
 447 };
 448
 449 /* Call this first to get a handle to pass to other functions.  If you
 450    want cpplib to manage its own hashtable, pass in a NULL pointer.
 451    Or you can pass in an initialised hash table that cpplib will use;
 452    this technique is used by the C front ends.  */
 453 extern cpp_reader *cpp_create_reader PARAMS ((struct ht *,
 454                                               enum c_lang));
 455
 456 /* Call this to release the handle.  Any use of the handle after this
 457    function returns is invalid.  Returns cpp_errors (pfile).  */
 458 extern int cpp_destroy PARAMS ((cpp_reader *));
 459
 460 /* Call these to get pointers to the options and callback structures
 461    for a given reader.  These pointers are good until you call
 462    cpp_finish on that reader.  You can either edit the callbacks
 463    through the pointer returned from cpp_get_callbacks, or set them
 464    with cpp_set_callbacks.  */
 465 extern cpp_options *cpp_get_options PARAMS ((cpp_reader *));
 466 extern const struct line_maps *cpp_get_line_maps PARAMS ((cpp_reader *));
 467 extern cpp_callbacks *cpp_get_callbacks PARAMS ((cpp_reader *));
 468 extern void cpp_set_callbacks PARAMS ((cpp_reader *, cpp_callbacks *));
 469
 470 /* Now call cpp_handle_option[s] to handle 1[or more] switches.  The
 471    return value is the number of arguments used.  If
 472    cpp_handle_options returns without using all arguments, it couldn't
 473    understand the next switch.  When there are no switches left, you
 474    must call cpp_post_options before calling cpp_start_read.  Only
 475    after cpp_post_options are the contents of the cpp_options
 476    structure reliable.  */
 477 extern int cpp_handle_options PARAMS ((cpp_reader *, int, char **));
 478 extern int cpp_handle_option PARAMS ((cpp_reader *, int, char **));
 479 extern void cpp_post_options PARAMS ((cpp_reader *));
 480
 481 /* Error count.  */
 482 extern unsigned int cpp_errors PARAMS ((cpp_reader *));
 483
 484 extern unsigned int cpp_token_len PARAMS ((const cpp_token *));
 485 extern unsigned char *cpp_token_as_text PARAMS ((cpp_reader *,
 486                                                  const cpp_token *));
 487 extern unsigned char *cpp_spell_token PARAMS ((cpp_reader *, const cpp_token *,
 488                                                unsigned char *));
 489 extern void cpp_register_pragma PARAMS ((cpp_reader *,
 490                                          const char *, const char *,
 491                                          void (*) PARAMS ((cpp_reader *))));
 492 extern void cpp_register_pragma_space PARAMS ((cpp_reader *, const char *));
 493
 494 extern int cpp_start_read PARAMS ((cpp_reader *, const char *));
 495 extern void cpp_finish PARAMS ((cpp_reader *));
 496 extern int cpp_avoid_paste PARAMS ((cpp_reader *, const cpp_token *,
 497                                     const cpp_token *));
 498 extern enum cpp_ttype cpp_can_paste PARAMS ((cpp_reader *, const cpp_token *,
 499                                              const cpp_token *, int *));
 500 extern void cpp_get_token PARAMS ((cpp_reader *, cpp_token *));
 501 extern const unsigned char *cpp_macro_definition PARAMS ((cpp_reader *,
 502                                                   const cpp_hashnode *));
 503 extern void _cpp_backup_tokens PARAMS ((cpp_reader *, unsigned int));
 504
 505 /* Evaluate a CPP_CHAR or CPP_WCHAR token.  */
 506 extern HOST_WIDE_INT
 507 cpp_interpret_charconst PARAMS ((cpp_reader *, const cpp_token *,
 508                                  int, int, unsigned int *));
 509
 510 extern void cpp_define PARAMS ((cpp_reader *, const char *));
 511 extern void cpp_assert PARAMS ((cpp_reader *, const char *));
 512 extern void cpp_undef  PARAMS ((cpp_reader *, const char *));
 513 extern void cpp_unassert PARAMS ((cpp_reader *, const char *));
 514
 515 extern cpp_buffer *cpp_push_buffer PARAMS ((cpp_reader *,
 516                                             const unsigned char *, size_t,
 517                                             int, int));
 518 extern int cpp_defined PARAMS ((cpp_reader *, const unsigned char *, int));
 519
 520 /* N.B. The error-message-printer prototypes have not been nicely
 521    formatted because exgettext needs to see 'msgid' on the same line
 522    as the name of the function in order to work properly.  Only the
 523    string argument gets a name in an effort to keep the lines from
 524    getting ridiculously oversized.  */
 525
 526 extern void cpp_ice PARAMS ((cpp_reader *, const char *msgid, ...))
 527   ATTRIBUTE_PRINTF_2;
 528 extern void cpp_fatal PARAMS ((cpp_reader *, const char *msgid, ...))
 529   ATTRIBUTE_PRINTF_2;
 530 extern void cpp_error PARAMS ((cpp_reader *, const char *msgid, ...))
 531   ATTRIBUTE_PRINTF_2;
 532 extern void cpp_warning PARAMS ((cpp_reader *, const char *msgid, ...))
 533   ATTRIBUTE_PRINTF_2;
 534 extern void cpp_pedwarn PARAMS ((cpp_reader *, const char *msgid, ...))
 535   ATTRIBUTE_PRINTF_2;
 536 extern void cpp_notice PARAMS ((cpp_reader *, const char *msgid, ...))
 537   ATTRIBUTE_PRINTF_2;
 538 extern void cpp_error_with_line PARAMS ((cpp_reader *, int, int, const char *msgid, ...))
 539   ATTRIBUTE_PRINTF_4;
 540 extern void cpp_warning_with_line PARAMS ((cpp_reader *, int, int, const char *msgid, ...))
 541   ATTRIBUTE_PRINTF_4;
 542 extern void cpp_pedwarn_with_line PARAMS ((cpp_reader *, int, int, const char *msgid, ...))
 543   ATTRIBUTE_PRINTF_4;
 544 extern void cpp_error_from_errno PARAMS ((cpp_reader *, const char *));
 545 extern void cpp_notice_from_errno PARAMS ((cpp_reader *, const char *));
 546
 547 /* In cpplex.c */
 548 extern int cpp_ideq                     PARAMS ((const cpp_token *,
 549                                                  const char *));
 550 extern void cpp_output_line             PARAMS ((cpp_reader *, FILE *));
 551 extern void cpp_output_token            PARAMS ((const cpp_token *, FILE *));
 552 extern const char *cpp_type2name        PARAMS ((enum cpp_ttype));
 553 extern unsigned int cpp_parse_escape    PARAMS ((cpp_reader *,
 554                                                  const unsigned char **,
 555                                                  const unsigned char *,
 556                                                  unsigned HOST_WIDE_INT, int));
 557
 558 /* In cpphash.c */
 559
 560 /* Lookup an identifier in the hashtable.  Puts the identifier in the
 561    table if it is not already there.  */
 562 extern cpp_hashnode *cpp_lookup         PARAMS ((cpp_reader *,
 563                                                  const unsigned char *,
 564                                                  unsigned int));
 565
 566 typedef int (*cpp_cb) PARAMS ((cpp_reader *, cpp_hashnode *, void *));
 567 extern void cpp_forall_identifiers      PARAMS ((cpp_reader *,
 568                                                  cpp_cb, void *));
 569
 570 /* In cppmacro.c */
 571 extern void cpp_scan_nooutput           PARAMS ((cpp_reader *));
 572 extern void cpp_start_lookahead         PARAMS ((cpp_reader *));
 573 extern void cpp_stop_lookahead          PARAMS ((cpp_reader *, int));
 574 extern int  cpp_sys_macro_p             PARAMS ((cpp_reader *));
 575
 576 /* In cppfiles.c */
 577 extern int cpp_included PARAMS ((cpp_reader *, const char *));
 578 extern void cpp_make_system_header PARAMS ((cpp_reader *, int, int));
 579
 580 #ifdef __cplusplus
 581 }
 582 #endif
 583
 584 #endif /* ! GCC_CPPLIB_H */