gcc/cpplib.h

   1 /* Definitions for CPP library.
   2    Copyright (C) 1995, 96-99, 2000 Free Software Foundation, Inc.
   3    Written by Per Bothner, 1994-95.
   4
   5 This program is free software; you can redistribute it and/or modify it
   6 under the terms of the GNU General Public License as published by the
   7 Free Software Foundation; either version 2, or (at your option) any
   8 later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program; if not, write to the Free Software
  17 Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  18
  19  In other words, you are welcome to use, share and improve this program.
  20  You are forbidden to forbid anyone else to use, share and improve
  21  what you give them.   Help stamp out software-hoarding!  */
  22 #ifndef __GCC_CPPLIB__
  23 #define __GCC_CPPLIB__
  24
  25 #include <sys/types.h>
  26
  27 #ifdef __cplusplus
  28 extern "C" {
  29 #endif
  30
  31 typedef struct cpp_reader cpp_reader;
  32 typedef struct cpp_buffer cpp_buffer;
  33 typedef struct cpp_options cpp_options;
  34 typedef struct cpp_printer cpp_printer;
  35 typedef struct cpp_token cpp_token;
  36 typedef struct cpp_toklist cpp_toklist;
  37 typedef struct cpp_name cpp_name;
  38
  39 /* The first two groups, apart from '=', can appear in preprocessor
  40    expressions.  This allows a lookup table to be implemented in
  41    _cpp_parse_expr.
  42
  43    The first group, to CPP_LAST_EQ, can be immediately followed by an
  44    '='.  The lexer needs operators ending in '=', like ">>=", to be in
  45    the same order as their counterparts without the '=', like ">>".  */
  46
  47 /* Positions in the table.  */
  48 #define CPP_LAST_EQ CPP_LSHIFT
  49 #define CPP_FIRST_DIGRAPH CPP_HASH
  50
  51 #define TTYPE_TABLE                             \
  52   T(CPP_EQ = 0,         "=")                    \
  53   T(CPP_NOT,            "!")                    \
  54   T(CPP_GREATER,        ">")    /* compare */   \
  55   T(CPP_LESS,           "<")                    \
  56   T(CPP_PLUS,           "+")    /* math */      \
  57   T(CPP_MINUS,          "-")                    \
  58   T(CPP_MULT,           "*")                    \
  59   T(CPP_DIV,            "/")                    \
  60   T(CPP_MOD,            "%")                    \
  61   T(CPP_AND,            "&")    /* bit ops */   \
  62   T(CPP_OR,             "|")                    \
  63   T(CPP_XOR,            "^")                    \
  64   T(CPP_RSHIFT,         ">>")                   \
  65   T(CPP_LSHIFT,         "<<")                   \
  66 \
  67   T(CPP_COMPL,          "~")                    \
  68   T(CPP_AND_AND,        "&&")   /* logical */   \
  69   T(CPP_OR_OR,          "||")                   \
  70   T(CPP_QUERY,          "?")                    \
  71   T(CPP_COLON,          ":")                    \
  72   T(CPP_COMMA,          ",")    /* grouping */  \
  73   T(CPP_OPEN_PAREN,     "(")                    \
  74   T(CPP_CLOSE_PAREN,    ")")                    \
  75   T(CPP_EQ_EQ,          "==")   /* compare */   \
  76   T(CPP_NOT_EQ,         "!=")                   \
  77   T(CPP_GREATER_EQ,     ">=")                   \
  78   T(CPP_LESS_EQ,        "<=")                   \
  79 \
  80   T(CPP_PLUS_EQ,        "+=")   /* math */      \
  81   T(CPP_MINUS_EQ,       "-=")                   \
  82   T(CPP_MULT_EQ,        "*=")                   \
  83   T(CPP_DIV_EQ,         "/=")                   \
  84   T(CPP_MOD_EQ,         "%=")                   \
  85   T(CPP_AND_EQ,         "&=")   /* bit ops */   \
  86   T(CPP_OR_EQ,          "|=")                   \
  87   T(CPP_XOR_EQ,         "^=")                   \
  88   T(CPP_RSHIFT_EQ,      ">>=")                  \
  89   T(CPP_LSHIFT_EQ,      "<<=")                  \
  90   /* Digraphs together, beginning with CPP_FIRST_DIGRAPH.  */   \
  91   T(CPP_HASH,           "#")    /* digraphs */  \
  92   T(CPP_PASTE,          "##")                   \
  93   T(CPP_OPEN_SQUARE,    "[")                    \
  94   T(CPP_CLOSE_SQUARE,   "]")                    \
  95   T(CPP_OPEN_BRACE,     "{")                    \
  96   T(CPP_CLOSE_BRACE,    "}")                    \
  97   /* The remainder of the punctuation.  Order is not significant. */    \
  98   T(CPP_SEMICOLON,      ";")    /* structure */ \
  99   T(CPP_ELLIPSIS,       "...")                  \
 100   T(CPP_BACKSLASH,      "\\")                   \
 101   T(CPP_PLUS_PLUS,      "++")   /* increment */ \
 102   T(CPP_MINUS_MINUS,    "--")                   \
 103   T(CPP_DEREF,          "->")   /* accessors */ \
 104   T(CPP_DOT,            ".")                    \
 105   T(CPP_SCOPE,          "::")                   \
 106   T(CPP_DEREF_STAR,     "->*")                  \
 107   T(CPP_DOT_STAR,       ".*")                   \
 108   T(CPP_MIN,            "<?")   /* extension */ \
 109   T(CPP_MAX,            ">?")                   \
 110   C(CPP_OTHER,          0)      /* stray punctuation */ \
 111 \
 112   H(CPP_NAME,           spell_name)     /* word */      \
 113   N(CPP_INT,            0)              /* 23 */        \
 114   N(CPP_FLOAT,          0)              /* 3.14159 */   \
 115   H(CPP_NUMBER,         spell_name)     /* 34_be+ta  */ \
 116   H(CPP_CHAR,           spell_string)   /* 'char' */    \
 117   H(CPP_WCHAR,          spell_string)   /* L'char' */   \
 118   H(CPP_STRING,         spell_string)   /* "string" */  \
 119   H(CPP_WSTRING,        spell_string)   /* L"string" */ \
 120 \
 121   H(CPP_C_COMMENT,      spell_comment)  /* Only if output comments.  */ \
 122   H(CPP_CPP_COMMENT,    spell_comment)  /* Only if output comments.  */ \
 123   H(CPP_CHILL_COMMENT,  spell_comment)  /* Only if output comments.  */ \
 124   N(CPP_MACRO_ARG,      0)              /* Macro argument.  */          \
 125   N(CPP_SUBLIST,        0)              /* Sublist.  */                 \
 126   E(CPP_VSPACE,         "\n")           /* End of line.  */             \
 127   N(CPP_EOF,            0)              /* End of file.  */             \
 128   N(CPP_HEADER_NAME,    0)              /* <stdio.h> in #include */     \
 129   N(CPP_ASSERTION,      0)              /* (...) in #assert */          \
 130 \
 131   /* Obsolete - will be removed when no code uses them still.  */       \
 132   H(CPP_COMMENT,        0)              /* Only if output comments.  */ \
 133   N(CPP_HSPACE,         0)              /* Horizontal white space.  */  \
 134   N(CPP_DIRECTIVE,      0)              /* #define and the like */      \
 135   N(CPP_MACRO,          0)              /* Like a NAME, but expanded.  */
 136
 137 #define T(e, s) e,
 138 #define H(e, s) e,
 139 #define C(e, s) e,
 140 #define N(e, s) e,
 141 #define E(e, s) e,
 142 enum cpp_ttype
 143 {
 144   TTYPE_TABLE
 145   N_TTYPES
 146 };
 147 #undef T
 148 #undef H
 149 #undef C
 150 #undef N
 151 #undef E
 152
 153 /* Payload of a NAME, NUMBER, FLOAT, STRING, or COMMENT token.  */
 154 struct cpp_name
 155 {
 156   unsigned int len;
 157   unsigned int offset;          /* from list->namebuf */
 158 };
 159
 160 #define TOK_NAME(list, token) ((list)->namebuf + (token)->val.name.offset)
 161
 162 /* Flags for the cpp_token structure.  */
 163 #define PREV_WHITESPACE     1   /* If whitespace before this token.  */
 164 #define DIGRAPH             2   /* If it was a digraph.  */
 165 #define UNSIGNED_INT        4   /* If int preprocessing token unsigned.  */
 166
 167 /* A preprocessing token.
 168    This has been carefully packed and should occupy 16 bytes on
 169    both 32- and 64-bit hosts.  */
 170 struct cpp_token
 171 {
 172   unsigned short col;                   /* starting column of this token */
 173 #ifdef ENUM_BITFIELDS_ARE_UNSIGNED
 174   enum cpp_ttype type : CHAR_BIT;       /* node type */
 175 #else
 176   unsigned char type;
 177 #endif
 178   unsigned char flags;                  /* flags - see above */
 179   unsigned int aux;                     /* CPP_OTHER character.  Hash of a
 180                                            NAME, or something - see uses
 181                                            in the code */
 182   union
 183   {
 184     struct cpp_name name;               /* a string */
 185     HOST_WIDEST_INT integer;            /* an integer */
 186   } val;
 187 };
 188
 189 /* Directive flags.  */
 190 #define SYNTAX_INCLUDE (1 << 8)
 191 #define SYNTAX_ASSERT  (1 << 9)
 192
 193 typedef int (*directive_handler) PARAMS ((cpp_reader *));
 194
 195 struct cpp_toklist
 196 {
 197   cpp_token *tokens;            /* actual tokens as an array */
 198   unsigned int tokens_used;     /* tokens used */
 199   unsigned int tokens_cap;      /* tokens allocated */
 200
 201   unsigned char *namebuf;       /* names buffer */
 202   unsigned int name_used;       /* _bytes_ used */
 203   unsigned int name_cap;        /* _bytes_ allocated */
 204
 205   unsigned int line;            /* starting line number */
 206
 207   /* Comment copying.  */
 208   cpp_token *comments;          /* comment tokens.  */
 209   unsigned int comments_used;   /* comment tokens used.  */
 210   unsigned int comments_cap;    /* comment token capacity.  */
 211
 212   /* Only used if tokens[0].type == CPP_DIRECTIVE.  This is the
 213      handler to call after lexing the rest of this line.  The flags
 214      indicate whether the rest of the line gets special treatment
 215      during lexing (#include, #if, #assert, #unassert).  */
 216   directive_handler dir_handler;
 217   unsigned short dir_flags;
 218 };
 219
 220 struct cpp_buffer
 221 {
 222   const unsigned char *cur;      /* current position */
 223   const unsigned char *rlimit; /* end of valid data */
 224   const unsigned char *buf;      /* entire buffer */
 225   const unsigned char *line_base; /* start of current line */
 226   const unsigned char *mark;  /* Saved position for lengthy backtrack. */
 227
 228   struct cpp_buffer *prev;
 229
 230   /* Filename specified with #line command.  */
 231   const char *nominal_fname;
 232   /* Actual directory of this file, used only for "" includes */
 233   struct file_name_list *actual_dir;
 234
 235   /* Pointer into the include hash table.  Used for include_next and
 236      to record control macros. */
 237   struct ihash *ihash;
 238
 239   /* If the buffer is the expansion of a macro, this points to the
 240      macro's hash table entry.  */
 241   struct hashnode *macro;
 242
 243   /* Value of if_stack at start of this file.
 244      Used to prohibit unmatched #endif (etc) in an include file.  */
 245   struct if_stack *if_stack;
 246
 247   /* Line number at line_base (above). */
 248   unsigned int lineno;
 249
 250   /* True if this is a header file included using <FILENAME>.  */
 251   char system_header_p;
 252
 253   /* True if buffer contains escape sequences.
 254      Currently there are two kinds:
 255      "\r-" means following identifier should not be macro-expanded.
 256      "\r " means a token-separator.  This turns into " " in final output
 257           if not stringizing and needed to separate tokens; otherwise nothing.
 258      Any other two-character sequence beginning with \r is an error.
 259
 260      If this is NOT set, then \r is a one-character escape meaning backslash
 261      newline.  This is guaranteed not to occur in the middle of a token.
 262      The two interpretations of \r do not conflict, because the two-character
 263      escapes are used only in macro buffers, and backslash-newline is removed
 264      from macro expansion text in collect_expansion and/or macarg.  */
 265   char has_escapes;
 266
 267   /* True if we have already warned about C++ comments in this file.
 268      The warning happens only for C89 extended mode with -pedantic on,
 269      or for -Wtraditional, and only once per file (otherwise it would
 270      be far too noisy).  */
 271   char warned_cplusplus_comments;
 272
 273   /* In a file buffer, true if this buffer's data is mmapped
 274      (currently never the case).  In a macro buffer, true if this
 275      buffer's data must be freed.  */
 276   char mapped;
 277 };
 278
 279 struct file_name_map_list;
 280 struct htab;
 281
 282 /* Maximum nesting of cpp_buffers.  We use a static limit, partly for
 283    efficiency, and partly to limit runaway recursion.  */
 284 #define CPP_STACK_MAX 200
 285
 286 /* Values for opts.dump_macros.
 287   dump_only means inhibit output of the preprocessed text
 288              and instead output the definitions of all user-defined
 289              macros in a form suitable for use as input to cpp.
 290    dump_names means pass #define and the macro name through to output.
 291    dump_definitions means pass the whole definition (plus #define) through
 292 */
 293 enum { dump_none = 0, dump_only, dump_names, dump_definitions };
 294
 295 /* This structure is nested inside struct cpp_reader, and
 296    carries all the options visible to the command line.  */
 297 struct cpp_options
 298 {
 299   /* Name of input and output files.  */
 300   const char *in_fname;
 301   const char *out_fname;
 302
 303   /* Pending options - -D, -U, -A, -I, -ixxx. */
 304   struct cpp_pending *pending;
 305
 306   /* File name which deps are being written to.  This is 0 if deps are
 307      being written to stdout.  */
 308   const char *deps_file;
 309
 310   /* Target-name to write with the dependency information.  */
 311   char *deps_target;
 312
 313   /* Search paths for include files.  */
 314   struct file_name_list *quote_include;  /* First dir to search for "file" */
 315   struct file_name_list *bracket_include;/* First dir to search for <file> */
 316
 317   /* Map between header names and file names, used only on DOS where
 318      file names are limited in length.  */
 319   struct file_name_map_list *map_list;
 320
 321   /* Directory prefix that should replace `/usr/lib/gcc-lib/TARGET/VERSION'
 322      in the standard include file directories.  */
 323   const char *include_prefix;
 324   unsigned int include_prefix_len;
 325
 326   /* Non-0 means -v, so print the full set of include dirs.  */
 327   unsigned char verbose;
 328
 329   /* Nonzero means use extra default include directories for C++.  */
 330   unsigned char cplusplus;
 331
 332   /* Nonzero means handle cplusplus style comments */
 333   unsigned char cplusplus_comments;
 334
 335   /* Nonzero means handle #import, for objective C.  */
 336   unsigned char objc;
 337
 338   /* Nonzero means this is an assembly file, so ignore unrecognized
 339      directives and the "# 33" form of #line, both of which are
 340      probably comments.  Also, permit unbalanced ' strings (again,
 341      likely to be in comments).  */
 342   unsigned char lang_asm;
 343
 344   /* Nonzero means this is Fortran, and we don't know where the
 345      comments are, so permit unbalanced ' strings.  Unlike lang_asm,
 346      this does not ignore unrecognized directives.  */
 347   unsigned char lang_fortran;
 348
 349   /* Nonzero means handle CHILL comment syntax and output CHILL string
 350      delimiters for __DATE__ etc. */
 351   unsigned char chill;
 352
 353   /* Nonzero means don't copy comments into the output file.  */
 354   unsigned char discard_comments;
 355
 356   /* Nonzero means process the ANSI trigraph sequences.  */
 357   unsigned char trigraphs;
 358
 359   /* Nonzero means print the names of included files rather than the
 360      preprocessed output.  1 means just the #include "...", 2 means
 361      #include <...> as well.  */
 362   unsigned char print_deps;
 363
 364   /* Nonzero if missing .h files in -M output are assumed to be
 365      generated files and not errors.  */
 366   unsigned char print_deps_missing_files;
 367
 368   /* If true, fopen (deps_file, "a") else fopen (deps_file, "w"). */
 369   unsigned char print_deps_append;
 370
 371   /* Nonzero means print names of header files (-H).  */
 372   unsigned char print_include_names;
 373
 374   /* Nonzero means cpp_pedwarn causes a hard error.  */
 375   unsigned char pedantic_errors;
 376
 377   /* Nonzero means don't print warning messages.  */
 378   unsigned char inhibit_warnings;
 379
 380   /* Nonzero means don't print error messages.  Has no option to
 381      select it, but can be set by a user of cpplib (e.g. fix-header).  */
 382   unsigned char inhibit_errors;
 383
 384   /* Nonzero means warn if slash-star appears in a comment.  */
 385   unsigned char warn_comments;
 386
 387   /* Nonzero means warn if there are any trigraphs.  */
 388   unsigned char warn_trigraphs;
 389
 390   /* Nonzero means warn if #import is used.  */
 391   unsigned char warn_import;
 392
 393   /* Nonzero means warn if a macro argument is (or would be)
 394      stringified with -traditional, and warn about directives
 395      with the # indented from the beginning of the line.  */
 396   unsigned char warn_traditional;
 397
 398   /* Nonzero means turn warnings into errors.  */
 399   unsigned char warnings_are_errors;
 400
 401   /* Nonzero causes output not to be done, but directives such as
 402      #define that have side effects are still obeyed.  */
 403   unsigned char no_output;
 404
 405   /* Nonzero means we should look for header.gcc files that remap file
 406      names.  */
 407   unsigned char remap;
 408
 409   /* Nonzero means don't output line number information.  */
 410   unsigned char no_line_commands;
 411
 412   /* Nonzero means -I- has been seen, so don't look for #include "foo"
 413      the source-file directory.  */
 414   unsigned char ignore_srcdir;
 415
 416   /* Zero means dollar signs are punctuation. */
 417   unsigned char dollars_in_ident;
 418
 419   /* Nonzero means try to imitate old fashioned non-ANSI preprocessor.  */
 420   unsigned char traditional;
 421
 422   /* Nonzero means warn if undefined identifiers are evaluated in an #if.  */
 423   unsigned char warn_undef;
 424
 425   /* Nonzero for the 1989 C Standard, including corrigenda and amendments.  */
 426   unsigned char c89;
 427
 428   /* Nonzero for the 1999 C Standard, including corrigenda and amendments.  */
 429   unsigned char c99;
 430
 431   /* Nonzero means give all the error messages the ANSI standard requires.  */
 432   unsigned char pedantic;
 433
 434   /* Nonzero means we're looking at already preprocessed code, so don't
 435      bother trying to do macro expansion and whatnot.  */
 436   unsigned char preprocessed;
 437
 438   /* Nonzero disables all the standard directories for headers.  */
 439   unsigned char no_standard_includes;
 440
 441   /* Nonzero disables the C++-specific standard directories for headers.  */
 442   unsigned char no_standard_cplusplus_includes;
 443
 444   /* Nonzero means dump macros in some fashion - see above.  */
 445   unsigned char dump_macros;
 446
 447   /* Nonzero means pass all #define and #undef directives which we
 448      actually process through to the output stream.  This feature is
 449      used primarily to allow cc1 to record the #defines and #undefs
 450      for the sake of debuggers which understand about preprocessor
 451      macros, but it may also be useful with -E to figure out how
 452      symbols are defined, and where they are defined.  */
 453   unsigned char debug_output;
 454
 455   /* Nonzero means pass #include lines through to the output.  */
 456   unsigned char dump_includes;
 457
 458   /* Print column number in error messages.  */
 459   unsigned char show_column;
 460 };
 461
 462
 463 /* A cpp_reader encapsulates the "state" of a pre-processor run.
 464    Applying cpp_get_token repeatedly yields a stream of pre-processor
 465    tokens.  Usually, there is only one cpp_reader object active. */
 466
 467 struct cpp_reader
 468 {
 469   /* Top of buffer stack.  */
 470   cpp_buffer *buffer;
 471
 472   /* Token list used by get_directive_token.  */
 473   cpp_toklist directbuf;
 474
 475   /* A buffer used for both for cpp_get_token's output, and also internally. */
 476   unsigned char *token_buffer;
 477   /* Allocated size of token_buffer.  CPP_RESERVE allocates space.  */
 478   unsigned int token_buffer_size;
 479   /* End of the written part of token_buffer. */
 480   unsigned char *limit;
 481
 482   /* Error counter for exit code */
 483   unsigned int errors;
 484
 485   /* Line where a newline was first seen in a string constant.  */
 486   unsigned int multiline_string_line;
 487
 488   /* Current depth in #include directives that use <...>.  */
 489   unsigned int system_include_depth;
 490
 491   /* Current depth of buffer stack. */
 492   unsigned int buffer_stack_depth;
 493
 494   /* Hash table of macros and assertions.  See cpphash.c */
 495   struct htab *hashtab;
 496
 497   /* Hash table of other included files.  See cppfiles.c */
 498   struct htab *all_include_files;
 499
 500   /* Chain of `actual directory' file_name_list entries,
 501      for "" inclusion. */
 502   struct file_name_list *actual_dirs;
 503
 504   /* Current maximum length of directory names in the search path
 505      for include files.  (Altered as we get more of them.)  */
 506   unsigned int max_include_len;
 507
 508   struct if_stack *if_stack;
 509   const unsigned char *potential_control_macro;
 510
 511   /* Buffer of -M output.  */
 512   struct deps *deps;
 513
 514   /* A buffer used only by read_and_prescan (in cppfiles.c), which is
 515      allocated once per cpp_reader object to keep it off the stack.  */
 516   unsigned char *input_buffer;
 517   size_t input_buffer_len;
 518
 519   /* User visible options.  */
 520   struct cpp_options opts;
 521
 522   /* Nonzero means we have printed (while error reporting) a list of
 523      containing files that matches the current status.  */
 524   unsigned char input_stack_listing_current;
 525
 526   /* If non-zero, macros are not expanded.  */
 527   unsigned char no_macro_expand;
 528
 529   /* If non-zero, directives cause a hard error.  Used when parsing
 530      macro arguments.  */
 531   unsigned char no_directives;
 532
 533   /* We're printed a warning recommending against using #import.  */
 534   unsigned char import_warning;
 535
 536   /* If true, characters between '<' and '>' are a single (string) token.  */
 537   unsigned char parsing_include_directive;
 538
 539   /* If true, # introduces an assertion (see do_assert) */
 540   unsigned char parsing_if_directive;
 541
 542   /* If true, # and ## are the STRINGIZE and TOKPASTE operators */
 543   unsigned char parsing_define_directive;
 544
 545   /* True if escape sequences (as described for has_escapes in
 546      parse_buffer) should be emitted.  */
 547   unsigned char output_escapes;
 548
 549   /* 0: Have seen non-white-space on this line.
 550      1: Only seen white space so far on this line.
 551      2: Only seen white space so far in this file.  */
 552   unsigned char only_seen_white;
 553
 554   /* True after cpp_start_read completes.  Used to inhibit some
 555      warnings while parsing the command line.  */
 556   unsigned char done_initializing;
 557 };
 558
 559 /* struct cpp_printer encapsulates state used to convert the stream of
 560    tokens coming from cpp_get_token back into a text file.  Not
 561    everyone wants to do that, hence we separate the function.  */
 562
 563 struct cpp_printer
 564 {
 565   FILE *outf;                   /* stream to write to */
 566   const char *last_fname;       /* previous file name */
 567   unsigned int last_bsd;        /* did we just push? */
 568   unsigned int lineno;          /* line currently being written */
 569   unsigned int written;         /* low water mark in token buffer */
 570 };
 571
 572 #define CPP_FATAL_LIMIT 1000
 573 /* True if we have seen a "fatal" error. */
 574 #define CPP_FATAL_ERRORS(READER) ((READER)->errors >= CPP_FATAL_LIMIT)
 575
 576 /* Macros for manipulating the token_buffer. */
 577
 578 /* Number of characters currently in PFILE's output buffer. */
 579 #define CPP_WRITTEN(PFILE) ((size_t)((PFILE)->limit - (PFILE)->token_buffer))
 580 #define CPP_PWRITTEN(PFILE) ((PFILE)->limit)
 581 #define CPP_ADJUST_WRITTEN(PFILE,DELTA) ((PFILE)->limit += (DELTA))
 582 #define CPP_SET_WRITTEN(PFILE,N) ((PFILE)->limit = (PFILE)->token_buffer + (N))
 583
 584 #define CPP_OPTION(PFILE, OPTION) ((PFILE)->opts.OPTION)
 585 #define CPP_BUFFER(PFILE) ((PFILE)->buffer)
 586 #define CPP_BUF_LINE(BUF) ((BUF)->lineno)
 587 #define CPP_BUF_COL(BUF) ((BUF)->cur - (BUF)->line_base)
 588
 589 /* Name under which this program was invoked.  */
 590 extern const char *progname;
 591
 592 extern void _cpp_lex_file PARAMS((cpp_reader *));
 593 extern int cpp_handle_options PARAMS ((cpp_reader *, int, char **));
 594 extern enum cpp_ttype cpp_get_token PARAMS ((cpp_reader *));
 595 extern enum cpp_ttype cpp_get_non_space_token PARAMS ((cpp_reader *));
 596
 597 extern void cpp_reader_init PARAMS ((cpp_reader *));
 598 extern cpp_printer *cpp_printer_init PARAMS ((cpp_reader *, cpp_printer *));
 599 extern int cpp_start_read PARAMS ((cpp_reader *, cpp_printer *, const char *));
 600 extern void cpp_output_tokens PARAMS ((cpp_reader *, cpp_printer *));
 601 extern void cpp_output_list PARAMS ((cpp_reader *, cpp_printer *,
 602                                      const cpp_toklist *));
 603 extern void cpp_finish PARAMS ((cpp_reader *, cpp_printer *));
 604 extern void cpp_cleanup PARAMS ((cpp_reader *));
 605
 606 extern cpp_buffer *cpp_file_buffer PARAMS((cpp_reader *));
 607 extern void cpp_define PARAMS ((cpp_reader *, const char *));
 608 extern void cpp_assert PARAMS ((cpp_reader *, const char *));
 609 extern void cpp_undef  PARAMS ((cpp_reader *, const char *));
 610 extern void cpp_unassert PARAMS ((cpp_reader *, const char *));
 611
 612 extern void cpp_free_token_list PARAMS ((cpp_toklist *));
 613
 614 /* N.B. The error-message-printer prototypes have not been nicely
 615    formatted because exgettext needs to see 'msgid' on the same line
 616    as the name of the function in order to work properly.  Only the
 617    string argument gets a name in an effort to keep the lines from
 618    getting ridiculously oversized.  */
 619
 620 extern void cpp_ice PARAMS ((cpp_reader *, const char *msgid, ...))
 621   ATTRIBUTE_PRINTF_2;
 622 extern void cpp_fatal PARAMS ((cpp_reader *, const char *msgid, ...))
 623   ATTRIBUTE_PRINTF_2;
 624 extern void cpp_error PARAMS ((cpp_reader *, const char *msgid, ...))
 625   ATTRIBUTE_PRINTF_2;
 626 extern void cpp_warning PARAMS ((cpp_reader *, const char *msgid, ...))
 627   ATTRIBUTE_PRINTF_2;
 628 extern void cpp_pedwarn PARAMS ((cpp_reader *, const char *msgid, ...))
 629   ATTRIBUTE_PRINTF_2;
 630 extern void cpp_notice PARAMS ((cpp_reader *, const char *msgid, ...))
 631   ATTRIBUTE_PRINTF_2;
 632 extern void cpp_error_with_line PARAMS ((cpp_reader *, int, int, const char *msgid, ...))
 633   ATTRIBUTE_PRINTF_4;
 634 extern void cpp_warning_with_line PARAMS ((cpp_reader *, int, int, const char *msgid, ...))
 635   ATTRIBUTE_PRINTF_4;
 636 extern void cpp_pedwarn_with_line PARAMS ((cpp_reader *, int, int, const char *msgid, ...))
 637   ATTRIBUTE_PRINTF_4;
 638 extern void cpp_pedwarn_with_file_and_line PARAMS ((cpp_reader *, const char *, int, int, const char *msgid, ...))
 639   ATTRIBUTE_PRINTF_5;
 640 extern void cpp_error_from_errno        PARAMS ((cpp_reader *, const char *));
 641 extern void cpp_notice_from_errno       PARAMS ((cpp_reader *, const char *));
 642
 643 /* In cpplex.c */
 644 extern cpp_buffer *cpp_push_buffer      PARAMS ((cpp_reader *,
 645                                                  const unsigned char *, long));
 646 extern cpp_buffer *cpp_pop_buffer       PARAMS ((cpp_reader *));
 647 extern void cpp_scan_buffer             PARAMS ((cpp_reader *, cpp_printer *));
 648 extern void cpp_scan_buffer_nooutput    PARAMS ((cpp_reader *));
 649 extern int cpp_idcmp                    PARAMS ((const unsigned char *,
 650                                                  size_t, const char *));
 651
 652 /* In cpphash.c */
 653 extern int cpp_defined                  PARAMS ((cpp_reader *,
 654                                                  const unsigned char *, int));
 655
 656 /* In cppfiles.c */
 657 extern int cpp_included                 PARAMS ((cpp_reader *, const char *));
 658 extern int cpp_read_file                PARAMS ((cpp_reader *, const char *));
 659
 660 #ifdef __cplusplus
 661 }
 662 #endif
 663 #endif /* __GCC_CPPLIB__ */