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_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     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 #define CPP_HASHNODE(HNODE)     ((cpp_hashnode *) (HNODE))
 470 #define HT_NODE(NODE)           ((ht_identifier *) (NODE))
 471 #define NODE_LEN(NODE)          HT_LEN (&(NODE)->ident)
 472 #define NODE_NAME(NODE)         HT_STR (&(NODE)->ident)
 473
 474 /* The common part of an identifier node shared amongst all 3 C front
 475    ends.  Also used to store CPP identifiers, which are a superset of
 476    identifiers in the grammatical sense.  */
 477 struct cpp_hashnode
 478 {
 479   struct ht_identifier ident;
 480   unsigned short arg_index;             /* Macro argument index.  */
 481   unsigned char directive_index;        /* Index into directive table.  */
 482   unsigned char rid_code;               /* Rid code - for front ends.  */
 483   ENUM_BITFIELD(node_type) type : 8;    /* CPP node type.  */
 484   unsigned char flags;                  /* CPP flags.  */
 485
 486   union
 487   {
 488     cpp_macro *macro;                   /* If a macro.  */
 489     struct answer *answers;             /* Answers to an assertion.  */
 490     enum cpp_ttype operator;            /* Code for a named operator.  */
 491     enum builtin_type builtin;          /* Code for a builtin macro.  */
 492   } value;
 493 };
 494
 495 /* Call this first to get a handle to pass to other functions.  If you
 496    want cpplib to manage its own hashtable, pass in a NULL pointer.
 497    Or you can pass in an initialised hash table that cpplib will use;
 498    this technique is used by the C front ends.  */
 499 extern cpp_reader *cpp_create_reader PARAMS ((struct ht *,
 500                                               enum c_lang));
 501
 502 /* Call this to release the handle.  Any use of the handle after this
 503    function returns is invalid.  Returns cpp_errors (pfile).  */
 504 extern int cpp_destroy PARAMS ((cpp_reader *));
 505
 506 /* Call these to get pointers to the options and callback structures
 507    for a given reader.  These pointers are good until you call
 508    cpp_finish on that reader.  You can either edit the callbacks
 509    through the pointer returned from cpp_get_callbacks, or set them
 510    with cpp_set_callbacks.  */
 511 extern cpp_options *cpp_get_options PARAMS ((cpp_reader *));
 512 extern cpp_callbacks *cpp_get_callbacks PARAMS ((cpp_reader *));
 513 extern void cpp_set_callbacks PARAMS ((cpp_reader *, cpp_callbacks *));
 514
 515 /* Now call cpp_handle_option[s] to handle 1[or more] switches.  The
 516    return value is the number of arguments used.  If
 517    cpp_handle_options returns without using all arguments, it couldn't
 518    understand the next switch.  When there are no switches left, you
 519    must call cpp_post_options before calling cpp_start_read.  Only
 520    after cpp_post_options are the contents of the cpp_options
 521    structure reliable.  */
 522 extern int cpp_handle_options PARAMS ((cpp_reader *, int, char **));
 523 extern int cpp_handle_option PARAMS ((cpp_reader *, int, char **));
 524 extern void cpp_post_options PARAMS ((cpp_reader *));
 525
 526 /* Error count.  */
 527 extern unsigned int cpp_errors PARAMS ((cpp_reader *));
 528
 529 extern unsigned int cpp_token_len PARAMS ((const cpp_token *));
 530 extern unsigned char *cpp_token_as_text PARAMS ((cpp_reader *,
 531                                                  const cpp_token *));
 532 extern unsigned char *cpp_spell_token PARAMS ((cpp_reader *, const cpp_token *,
 533                                                unsigned char *));
 534 extern void cpp_register_pragma PARAMS ((cpp_reader *,
 535                                          const char *, const char *,
 536                                          void (*) PARAMS ((cpp_reader *))));
 537 extern void cpp_register_pragma_space PARAMS ((cpp_reader *, const char *));
 538
 539 extern int cpp_start_read PARAMS ((cpp_reader *, const char *));
 540 extern void cpp_finish PARAMS ((cpp_reader *));
 541 extern int cpp_avoid_paste PARAMS ((cpp_reader *, const cpp_token *,
 542                                     const cpp_token *));
 543 extern enum cpp_ttype cpp_can_paste PARAMS ((cpp_reader *, const cpp_token *,
 544                                              const cpp_token *, int *));
 545 extern void cpp_get_token PARAMS ((cpp_reader *, cpp_token *));
 546 extern const cpp_lexer_pos *cpp_get_line PARAMS ((cpp_reader *));
 547 extern const unsigned char *cpp_macro_definition PARAMS ((cpp_reader *,
 548                                                   const cpp_hashnode *));
 549
 550 /* Evaluate a CPP_CHAR or CPP_WCHAR token.  */
 551 extern HOST_WIDE_INT
 552 cpp_interpret_charconst PARAMS ((cpp_reader *, const cpp_token *,
 553                                  int, int, unsigned int *));
 554
 555 extern void cpp_define PARAMS ((cpp_reader *, const char *));
 556 extern void cpp_assert PARAMS ((cpp_reader *, const char *));
 557 extern void cpp_undef  PARAMS ((cpp_reader *, const char *));
 558 extern void cpp_unassert PARAMS ((cpp_reader *, const char *));
 559
 560 extern cpp_buffer *cpp_push_buffer PARAMS ((cpp_reader *,
 561                                             const unsigned char *, size_t,
 562                                             enum cpp_buffer_type,
 563                                             const char *));
 564 extern cpp_buffer *cpp_pop_buffer PARAMS ((cpp_reader *));
 565 extern int cpp_defined PARAMS ((cpp_reader *, const unsigned char *, int));
 566
 567 /* N.B. The error-message-printer prototypes have not been nicely
 568    formatted because exgettext needs to see 'msgid' on the same line
 569    as the name of the function in order to work properly.  Only the
 570    string argument gets a name in an effort to keep the lines from
 571    getting ridiculously oversized.  */
 572
 573 extern void cpp_ice PARAMS ((cpp_reader *, const char *msgid, ...))
 574   ATTRIBUTE_PRINTF_2;
 575 extern void cpp_fatal PARAMS ((cpp_reader *, const char *msgid, ...))
 576   ATTRIBUTE_PRINTF_2;
 577 extern void cpp_error PARAMS ((cpp_reader *, const char *msgid, ...))
 578   ATTRIBUTE_PRINTF_2;
 579 extern void cpp_warning PARAMS ((cpp_reader *, const char *msgid, ...))
 580   ATTRIBUTE_PRINTF_2;
 581 extern void cpp_pedwarn PARAMS ((cpp_reader *, const char *msgid, ...))
 582   ATTRIBUTE_PRINTF_2;
 583 extern void cpp_notice PARAMS ((cpp_reader *, const char *msgid, ...))
 584   ATTRIBUTE_PRINTF_2;
 585 extern void cpp_error_with_line PARAMS ((cpp_reader *, int, int, const char *msgid, ...))
 586   ATTRIBUTE_PRINTF_4;
 587 extern void cpp_warning_with_line PARAMS ((cpp_reader *, int, int, const char *msgid, ...))
 588   ATTRIBUTE_PRINTF_4;
 589 extern void cpp_pedwarn_with_line PARAMS ((cpp_reader *, int, int, const char *msgid, ...))
 590   ATTRIBUTE_PRINTF_4;
 591 extern void cpp_pedwarn_with_file_and_line PARAMS ((cpp_reader *, const char *, int, int, const char *msgid, ...))
 592   ATTRIBUTE_PRINTF_5;
 593 extern void cpp_error_from_errno PARAMS ((cpp_reader *, const char *));
 594 extern void cpp_notice_from_errno PARAMS ((cpp_reader *, const char *));
 595
 596 /* In cpplex.c */
 597 extern int cpp_ideq                     PARAMS ((const cpp_token *,
 598                                                  const char *));
 599 extern void cpp_output_line             PARAMS ((cpp_reader *, FILE *));
 600 extern void cpp_output_token            PARAMS ((const cpp_token *, FILE *));
 601 extern const char *cpp_type2name        PARAMS ((enum cpp_ttype));
 602 extern unsigned int cpp_parse_escape    PARAMS ((cpp_reader *,
 603                                                  const unsigned char **,
 604                                                  const unsigned char *,
 605                                                  unsigned HOST_WIDE_INT, int));
 606
 607 /* In cpphash.c */
 608
 609 /* Lookup an identifier in the hashtable.  Puts the identifier in the
 610    table if it is not already there.  */
 611 extern cpp_hashnode *cpp_lookup         PARAMS ((cpp_reader *,
 612                                                  const unsigned char *,
 613                                                  unsigned int));
 614
 615 typedef int (*cpp_cb) PARAMS ((cpp_reader *, cpp_hashnode *, void *));
 616 extern void cpp_forall_identifiers      PARAMS ((cpp_reader *,
 617                                                  cpp_cb, void *));
 618
 619 /* In cppmacro.c */
 620 extern void cpp_scan_buffer_nooutput    PARAMS ((cpp_reader *, int));
 621 extern void cpp_start_lookahead         PARAMS ((cpp_reader *));
 622 extern void cpp_stop_lookahead          PARAMS ((cpp_reader *, int));
 623 extern int  cpp_sys_macro_p             PARAMS ((cpp_reader *));
 624
 625 /* In cppfiles.c */
 626 extern int cpp_included PARAMS ((cpp_reader *, const char *));
 627 extern void cpp_make_system_header PARAMS ((cpp_reader *, int, int));
 628
 629 #ifdef __cplusplus
 630 }
 631 #endif
 632
 633 #endif /* ! GCC_CPPLIB_H */