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_COMPL,          "~")                    \
  65   T(CPP_RSHIFT,         ">>")                   \
  66   T(CPP_LSHIFT,         "<<")                   \
  67 \
  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_COMPL_EQ,       "~=")                   \
  89   T(CPP_RSHIFT_EQ,      ">>=")                  \
  90   T(CPP_LSHIFT_EQ,      "<<=")                  \
  91   /* Digraphs together, beginning with CPP_FIRST_DIGRAPH.  */   \
  92   T(CPP_HASH,           "#")    /* digraphs */  \
  93   T(CPP_PASTE,          "##")                   \
  94   T(CPP_OPEN_SQUARE,    "[")                    \
  95   T(CPP_CLOSE_SQUARE,   "]")                    \
  96   T(CPP_OPEN_BRACE,     "{")                    \
  97   T(CPP_CLOSE_BRACE,    "}")                    \
  98   /* The remainder of the punctuation.  Order is not significant. */    \
  99   T(CPP_SEMICOLON,      ";")    /* structure */ \
 100   T(CPP_ELLIPSIS,       "...")                  \
 101   T(CPP_BACKSLASH,      "\\")                   \
 102   T(CPP_PLUS_PLUS,      "++")   /* increment */ \
 103   T(CPP_MINUS_MINUS,    "--")                   \
 104   T(CPP_DEREF,          "->")   /* accessors */ \
 105   T(CPP_DOT,            ".")                    \
 106   T(CPP_SCOPE,          "::")                   \
 107   T(CPP_DEREF_STAR,     "->*")                  \
 108   T(CPP_DOT_STAR,       ".*")                   \
 109   T(CPP_MIN,            "<?")   /* extension */ \
 110   T(CPP_MAX,            ">?")                   \
 111   H(CPP_OTHER,          spell_other) /* stray punctuation */ \
 112 \
 113   H(CPP_NAME,           spell_name)     /* word */      \
 114   N(CPP_INT,            0)              /* 23 */        \
 115   N(CPP_FLOAT,          0)              /* 3.14159 */   \
 116   H(CPP_NUMBER,         spell_name)     /* 34_be+ta  */ \
 117   H(CPP_CHAR,           spell_char)     /* 'char' */    \
 118   H(CPP_WCHAR,          spell_char)     /* L'char' */   \
 119   H(CPP_STRING,         spell_string)   /* "string" */  \
 120   H(CPP_WSTRING,        spell_string)   /* L"string" */ \
 121 \
 122   H(CPP_C_COMMENT,      spell_comment)  /* Only if output comments.  */ \
 123   H(CPP_CPP_COMMENT,    spell_comment)  /* Only if output comments.  */ \
 124   H(CPP_CHILL_COMMENT,  spell_comment)  /* Only if output comments.  */ \
 125   N(CPP_MACRO_ARG,      0)              /* Macro argument.  */          \
 126   N(CPP_SUBLIST,        0)              /* Sublist.  */                 \
 127   E(CPP_VSPACE,         "\n")           /* End of line.  */             \
 128   N(CPP_EOF,            0)              /* End of file.  */             \
 129   N(CPP_HEADER_NAME,    0)              /* <stdio.h> in #include */     \
 130   N(CPP_ASSERTION,      0)              /* (...) in #assert */          \
 131 \
 132   /* Obsolete - will be removed when no code uses them still.  */       \
 133   H(CPP_COMMENT,        0)              /* Only if output comments.  */ \
 134   N(CPP_HSPACE,         0)              /* Horizontal white space.  */  \
 135   N(CPP_POP,            0)              /* End of buffer.  */           \
 136   N(CPP_DIRECTIVE,      0)              /* #define and the like */      \
 137   N(CPP_MACRO,          0)              /* Like a NAME, but expanded.  */
 138
 139 #define T(e, s) e,
 140 #define H(e, s) e,
 141 #define N(e, s) e,
 142 #define E(e, s) e,
 143 enum cpp_ttype
 144 {
 145   TTYPE_TABLE
 146   N_TTYPES
 147 };
 148 #undef T
 149 #undef H
 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 typedef int (*parse_cleanup_t) PARAMS ((cpp_buffer *, cpp_reader *));
 195
 196 struct cpp_toklist
 197 {
 198   cpp_token *tokens;            /* actual tokens as an array */
 199   unsigned int tokens_used;     /* tokens used */
 200   unsigned int tokens_cap;      /* tokens allocated */
 201
 202   unsigned char *namebuf;       /* names buffer */
 203   unsigned int name_used;       /* _bytes_ used */
 204   unsigned int name_cap;        /* _bytes_ allocated */
 205
 206   unsigned int line;            /* starting line number */
 207
 208   /* Comment copying.  */
 209   cpp_token *comments;          /* comment tokens.  */
 210   unsigned int comments_used;   /* comment tokens used.  */
 211   unsigned int comments_cap;    /* comment token capacity.  */
 212
 213   /* Only used if tokens[0].type == CPP_DIRECTIVE.  This is the
 214      handler to call after lexing the rest of this line.  The flags
 215      indicate whether the rest of the line gets special treatment
 216      during lexing (#include, #if, #assert, #unassert).  */
 217   directive_handler dir_handler;
 218   unsigned short dir_flags;
 219 };
 220
 221 struct cpp_buffer
 222 {
 223   const unsigned char *cur;      /* current position */
 224   const unsigned char *rlimit; /* end of valid data */
 225   const unsigned char *buf;      /* entire buffer */
 226   const unsigned char *line_base; /* start of current line */
 227   const unsigned char *mark;  /* Saved position for lengthy backtrack. */
 228
 229   struct cpp_buffer *prev;
 230
 231   /* Filename specified with #line command.  */
 232   const char *nominal_fname;
 233   /* Actual directory of this file, used only for "" includes */
 234   struct file_name_list *actual_dir;
 235
 236   /* Pointer into the include hash table.  Used for include_next and
 237      to record control macros. */
 238   struct ihash *ihash;
 239
 240   parse_cleanup_t cleanup;
 241
 242   /* If the buffer is the expansion of a macro, this points to the
 243      macro's hash table entry.  */
 244   struct hashnode *macro;
 245
 246   /* Value of if_stack at start of this file.
 247      Used to prohibit unmatched #endif (etc) in an include file.  */
 248   struct if_stack *if_stack;
 249
 250   /* Line number at line_base (above). */
 251   unsigned int lineno;
 252
 253   /* True if this is a header file included using <FILENAME>.  */
 254   char system_header_p;
 255
 256   /* True if end-of-file has already been hit once in this buffer.  */
 257   char seen_eof;
 258
 259   /* True if buffer contains escape sequences.
 260      Currently there are two kinds:
 261      "\r-" means following identifier should not be macro-expanded.
 262      "\r " means a token-separator.  This turns into " " in final output
 263           if not stringizing and needed to separate tokens; otherwise nothing.
 264      Any other two-character sequence beginning with \r is an error.
 265
 266      If this is NOT set, then \r is a one-character escape meaning backslash
 267      newline.  This is guaranteed not to occur in the middle of a token.
 268      The two interpretations of \r do not conflict, because the two-character
 269      escapes are used only in macro buffers, and backslash-newline is removed
 270      from macro expansion text in collect_expansion and/or macarg.  */
 271   char has_escapes;
 272
 273   /* Used by the C++ frontend to implement redirected input (such as for
 274      default argument and/or template parsing).  */
 275   char manual_pop;
 276
 277   /* True if we have already warned about C++ comments in this file.
 278      The warning happens only for C89 extended mode with -pedantic on,
 279      and only once per file (otherwise it would be far too noisy).  */
 280   char warned_cplusplus_comments;
 281 };
 282
 283 struct file_name_map_list;
 284 struct htab;
 285
 286 /* Maximum nesting of cpp_buffers.  We use a static limit, partly for
 287    efficiency, and partly to limit runaway recursion.  */
 288 #define CPP_STACK_MAX 200
 289
 290 /* Values for opts.dump_macros.
 291   dump_only means inhibit output of the preprocessed text
 292              and instead output the definitions of all user-defined
 293              macros in a form suitable for use as input to cpp.
 294    dump_names means pass #define and the macro name through to output.
 295    dump_definitions means pass the whole definition (plus #define) through
 296 */
 297 enum { dump_none = 0, dump_only, dump_names, dump_definitions };
 298
 299 /* This structure is nested inside struct cpp_reader, and
 300    carries all the options visible to the command line.  */
 301 struct cpp_options
 302 {
 303   /* Name of input and output files.  */
 304   const char *in_fname;
 305   const char *out_fname;
 306
 307   /* Pending options - -D, -U, -A, -I, -ixxx. */
 308   struct cpp_pending *pending;
 309
 310   /* File name which deps are being written to.  This is 0 if deps are
 311      being written to stdout.  */
 312   const char *deps_file;
 313
 314   /* Target-name to write with the dependency information.  */
 315   char *deps_target;
 316
 317   /* Search paths for include files.  */
 318   struct file_name_list *quote_include;  /* First dir to search for "file" */
 319   struct file_name_list *bracket_include;/* First dir to search for <file> */
 320
 321   /* Map between header names and file names, used only on DOS where
 322      file names are limited in length.  */
 323   struct file_name_map_list *map_list;
 324
 325   /* Directory prefix that should replace `/usr/lib/gcc-lib/TARGET/VERSION'
 326      in the standard include file directories.  */
 327   const char *include_prefix;
 328   unsigned int include_prefix_len;
 329
 330   /* Non-0 means -v, so print the full set of include dirs.  */
 331   unsigned char verbose;
 332
 333   /* Nonzero means use extra default include directories for C++.  */
 334   unsigned char cplusplus;
 335
 336   /* Nonzero means handle cplusplus style comments */
 337   unsigned char cplusplus_comments;
 338
 339   /* Nonzero means handle #import, for objective C.  */
 340   unsigned char objc;
 341
 342   /* Nonzero means this is an assembly file, so ignore unrecognized
 343      directives and the "# 33" form of #line, both of which are
 344      probably comments.  Also, permit unbalanced ' strings (again,
 345      likely to be in comments).  */
 346   unsigned char lang_asm;
 347
 348   /* Nonzero means this is Fortran, and we don't know where the
 349      comments are, so permit unbalanced ' strings.  Unlike lang_asm,
 350      this does not ignore unrecognized directives.  */
 351   unsigned char lang_fortran;
 352
 353   /* Nonzero means handle CHILL comment syntax and output CHILL string
 354      delimiters for __DATE__ etc. */
 355   unsigned char chill;
 356
 357   /* Nonzero means don't copy comments into the output file.  */
 358   unsigned char discard_comments;
 359
 360   /* Nonzero means process the ANSI trigraph sequences.  */
 361   unsigned char trigraphs;
 362
 363   /* Nonzero means print the names of included files rather than the
 364      preprocessed output.  1 means just the #include "...", 2 means
 365      #include <...> as well.  */
 366   unsigned char print_deps;
 367
 368   /* Nonzero if missing .h files in -M output are assumed to be
 369      generated files and not errors.  */
 370   unsigned char print_deps_missing_files;
 371
 372   /* If true, fopen (deps_file, "a") else fopen (deps_file, "w"). */
 373   unsigned char print_deps_append;
 374
 375   /* Nonzero means print names of header files (-H).  */
 376   unsigned char print_include_names;
 377
 378   /* Nonzero means cpp_pedwarn causes a hard error.  */
 379   unsigned char pedantic_errors;
 380
 381   /* Nonzero means don't print warning messages.  */
 382   unsigned char inhibit_warnings;
 383
 384   /* Nonzero means don't print error messages.  Has no option to
 385      select it, but can be set by a user of cpplib (e.g. fix-header).  */
 386   unsigned char inhibit_errors;
 387
 388   /* Nonzero means warn if slash-star appears in a comment.  */
 389   unsigned char warn_comments;
 390
 391   /* Nonzero means warn if there are any trigraphs.  */
 392   unsigned char warn_trigraphs;
 393
 394   /* Nonzero means warn if #import is used.  */
 395   unsigned char warn_import;
 396
 397   /* Nonzero means warn if a macro argument is (or would be)
 398      stringified with -traditional, and warn about directives
 399      with the # indented from the beginning of the line.  */
 400   unsigned char warn_traditional;
 401
 402   /* Nonzero means turn warnings into errors.  */
 403   unsigned char warnings_are_errors;
 404
 405   /* Nonzero causes output not to be done, but directives such as
 406      #define that have side effects are still obeyed.  */
 407   unsigned char no_output;
 408
 409   /* Nonzero means we should look for header.gcc files that remap file
 410      names.  */
 411   unsigned char remap;
 412
 413   /* Nonzero means don't output line number information.  */
 414   unsigned char no_line_commands;
 415
 416   /* Nonzero means -I- has been seen, so don't look for #include "foo"
 417      the source-file directory.  */
 418   unsigned char ignore_srcdir;
 419
 420   /* Zero means dollar signs are punctuation. */
 421   unsigned char dollars_in_ident;
 422
 423   /* Nonzero means try to imitate old fashioned non-ANSI preprocessor.  */
 424   unsigned char traditional;
 425
 426   /* Nonzero means warn if undefined identifiers are evaluated in an #if.  */
 427   unsigned char warn_undef;
 428
 429   /* Nonzero for the 1989 C Standard, including corrigenda and amendments.  */
 430   unsigned char c89;
 431
 432   /* Nonzero for the 1999 C Standard, including corrigenda and amendments.  */
 433   unsigned char c99;
 434
 435   /* Nonzero means give all the error messages the ANSI standard requires.  */
 436   unsigned char pedantic;
 437
 438   /* Nonzero means we're looking at already preprocessed code, so don't
 439      bother trying to do macro expansion and whatnot.  */
 440   unsigned char preprocessed;
 441
 442   /* Nonzero disables all the standard directories for headers.  */
 443   unsigned char no_standard_includes;
 444
 445   /* Nonzero disables the C++-specific standard directories for headers.  */
 446   unsigned char no_standard_cplusplus_includes;
 447
 448   /* Nonzero means dump macros in some fashion - see above.  */
 449   unsigned char dump_macros;
 450
 451   /* Nonzero means pass all #define and #undef directives which we
 452      actually process through to the output stream.  This feature is
 453      used primarily to allow cc1 to record the #defines and #undefs
 454      for the sake of debuggers which understand about preprocessor
 455      macros, but it may also be useful with -E to figure out how
 456      symbols are defined, and where they are defined.  */
 457   unsigned char debug_output;
 458
 459   /* Nonzero means pass #include lines through to the output.  */
 460   unsigned char dump_includes;
 461
 462   /* Print column number in error messages.  */
 463   unsigned char show_column;
 464 };
 465
 466
 467 /* A cpp_reader encapsulates the "state" of a pre-processor run.
 468    Applying cpp_get_token repeatedly yields a stream of pre-processor
 469    tokens.  Usually, there is only one cpp_reader object active. */
 470
 471 struct cpp_reader
 472 {
 473   /* Top of buffer stack.  */
 474   cpp_buffer *buffer;
 475
 476   /* Token list used by get_directive_token.  */
 477   cpp_toklist directbuf;
 478
 479   /* A buffer used for both for cpp_get_token's output, and also internally. */
 480   unsigned char *token_buffer;
 481   /* Allocated size of token_buffer.  CPP_RESERVE allocates space.  */
 482   unsigned int token_buffer_size;
 483   /* End of the written part of token_buffer. */
 484   unsigned char *limit;
 485
 486   /* Error counter for exit code */
 487   unsigned int errors;
 488
 489   /* Line where a newline was first seen in a string constant.  */
 490   unsigned int multiline_string_line;
 491
 492   /* Current depth in #include directives that use <...>.  */
 493   unsigned int system_include_depth;
 494
 495   /* Current depth of buffer stack. */
 496   unsigned int buffer_stack_depth;
 497
 498   /* Hash table of macros and assertions.  See cpphash.c */
 499   struct htab *hashtab;
 500
 501   /* Hash table of other included files.  See cppfiles.c */
 502   struct htab *all_include_files;
 503
 504   /* Chain of `actual directory' file_name_list entries,
 505      for "" inclusion. */
 506   struct file_name_list *actual_dirs;
 507
 508   /* Current maximum length of directory names in the search path
 509      for include files.  (Altered as we get more of them.)  */
 510   unsigned int max_include_len;
 511
 512   struct if_stack *if_stack;
 513   const unsigned char *potential_control_macro;
 514
 515   /* Buffer of -M output.  */
 516   struct deps *deps;
 517
 518   /* A buffer used only by read_and_prescan (in cppfiles.c), which is
 519      allocated once per cpp_reader object to keep it off the stack.  */
 520   unsigned char *input_buffer;
 521   size_t input_buffer_len;
 522
 523   /* User visible options.  */
 524   struct cpp_options opts;
 525
 526   /* Nonzero means we have printed (while error reporting) a list of
 527      containing files that matches the current status.  */
 528   unsigned char input_stack_listing_current;
 529
 530   /* If non-zero, macros are not expanded.  */
 531   unsigned char no_macro_expand;
 532
 533   /* If non-zero, directives cause a hard error.  Used when parsing
 534      macro arguments.  */
 535   unsigned char no_directives;
 536
 537   /* We're printed a warning recommending against using #import.  */
 538   unsigned char import_warning;
 539
 540   /* If true, characters between '<' and '>' are a single (string) token.  */
 541   unsigned char parsing_include_directive;
 542
 543   /* If true, # introduces an assertion (see do_assert) */
 544   unsigned char parsing_if_directive;
 545
 546   /* If true, # and ## are the STRINGIZE and TOKPASTE operators */
 547   unsigned char parsing_define_directive;
 548
 549   /* True if escape sequences (as described for has_escapes in
 550      parse_buffer) should be emitted.  */
 551   unsigned char output_escapes;
 552
 553   /* 0: Have seen non-white-space on this line.
 554      1: Only seen white space so far on this line.
 555      2: Only seen white space so far in this file.  */
 556   unsigned char only_seen_white;
 557
 558   /* True after cpp_start_read completes.  Used to inhibit some
 559      warnings while parsing the command line.  */
 560   unsigned char done_initializing;
 561 };
 562
 563 /* struct cpp_printer encapsulates state used to convert the stream of
 564    tokens coming from cpp_get_token back into a text file.  Not
 565    everyone wants to do that, hence we separate the function.  */
 566
 567 struct cpp_printer
 568 {
 569   FILE *outf;                   /* stream to write to */
 570   const char *last_fname;       /* previous file name */
 571   unsigned int last_bsd;        /* did we just push? */
 572   unsigned int lineno;          /* line currently being written */
 573   unsigned int written;         /* low water mark in token buffer */
 574 };
 575
 576 #define CPP_FATAL_LIMIT 1000
 577 /* True if we have seen a "fatal" error. */
 578 #define CPP_FATAL_ERRORS(READER) ((READER)->errors >= CPP_FATAL_LIMIT)
 579
 580 /* Macros for manipulating the token_buffer. */
 581
 582 /* Number of characters currently in PFILE's output buffer. */
 583 #define CPP_WRITTEN(PFILE) ((size_t)((PFILE)->limit - (PFILE)->token_buffer))
 584 #define CPP_PWRITTEN(PFILE) ((PFILE)->limit)
 585 #define CPP_ADJUST_WRITTEN(PFILE,DELTA) ((PFILE)->limit += (DELTA))
 586 #define CPP_SET_WRITTEN(PFILE,N) ((PFILE)->limit = (PFILE)->token_buffer + (N))
 587
 588 #define CPP_OPTION(PFILE, OPTION) ((PFILE)->opts.OPTION)
 589 #define CPP_BUFFER(PFILE) ((PFILE)->buffer)
 590 #define CPP_BUF_LINE(BUF) ((BUF)->lineno)
 591 #define CPP_BUF_COL(BUF) ((BUF)->cur - (BUF)->line_base)
 592
 593 /* Name under which this program was invoked.  */
 594 extern const char *progname;
 595
 596 extern void _cpp_lex_file PARAMS((cpp_reader *));
 597 extern int cpp_handle_options PARAMS ((cpp_reader *, int, char **));
 598 extern enum cpp_ttype cpp_get_token PARAMS ((cpp_reader *));
 599 extern enum cpp_ttype cpp_get_non_space_token PARAMS ((cpp_reader *));
 600
 601 extern void cpp_reader_init PARAMS ((cpp_reader *));
 602 extern cpp_printer *cpp_printer_init PARAMS ((cpp_reader *, cpp_printer *));
 603 extern int cpp_start_read PARAMS ((cpp_reader *, cpp_printer *, const char *));
 604 extern void cpp_output_tokens PARAMS ((cpp_reader *, cpp_printer *));
 605 extern void cpp_output_list PARAMS ((cpp_reader *, cpp_printer *,
 606                                      const cpp_toklist *));
 607 extern void cpp_finish PARAMS ((cpp_reader *, cpp_printer *));
 608 extern void cpp_cleanup PARAMS ((cpp_reader *));
 609
 610 extern cpp_buffer *cpp_file_buffer PARAMS((cpp_reader *));
 611 extern void cpp_define PARAMS ((cpp_reader *, const char *));
 612 extern void cpp_assert PARAMS ((cpp_reader *, const char *));
 613 extern void cpp_undef  PARAMS ((cpp_reader *, const char *));
 614 extern void cpp_unassert PARAMS ((cpp_reader *, const char *));
 615
 616 extern void cpp_free_token_list PARAMS ((cpp_toklist *));
 617
 618 /* N.B. The error-message-printer prototypes have not been nicely
 619    formatted because exgettext needs to see 'msgid' on the same line
 620    as the name of the function in order to work properly.  Only the
 621    string argument gets a name in an effort to keep the lines from
 622    getting ridiculously oversized.  */
 623
 624 extern void cpp_ice PARAMS ((cpp_reader *, const char *msgid, ...))
 625   ATTRIBUTE_PRINTF_2;
 626 extern void cpp_fatal PARAMS ((cpp_reader *, const char *msgid, ...))
 627   ATTRIBUTE_PRINTF_2;
 628 extern void cpp_error PARAMS ((cpp_reader *, const char *msgid, ...))
 629   ATTRIBUTE_PRINTF_2;
 630 extern void cpp_warning PARAMS ((cpp_reader *, const char *msgid, ...))
 631   ATTRIBUTE_PRINTF_2;
 632 extern void cpp_pedwarn PARAMS ((cpp_reader *, const char *msgid, ...))
 633   ATTRIBUTE_PRINTF_2;
 634 extern void cpp_notice PARAMS ((cpp_reader *, const char *msgid, ...))
 635   ATTRIBUTE_PRINTF_2;
 636 extern void cpp_error_with_line PARAMS ((cpp_reader *, int, int, const char *msgid, ...))
 637   ATTRIBUTE_PRINTF_4;
 638 extern void cpp_warning_with_line PARAMS ((cpp_reader *, int, int, const char *msgid, ...))
 639   ATTRIBUTE_PRINTF_4;
 640 extern void cpp_pedwarn_with_line PARAMS ((cpp_reader *, int, int, const char *msgid, ...))
 641   ATTRIBUTE_PRINTF_4;
 642 extern void cpp_pedwarn_with_file_and_line PARAMS ((cpp_reader *, const char *, int, int, const char *msgid, ...))
 643   ATTRIBUTE_PRINTF_5;
 644 extern void cpp_error_from_errno        PARAMS ((cpp_reader *, const char *));
 645 extern void cpp_notice_from_errno       PARAMS ((cpp_reader *, const char *));
 646
 647 /* In cpplex.c */
 648 extern cpp_buffer *cpp_push_buffer      PARAMS ((cpp_reader *,
 649                                                  const unsigned char *, long));
 650 extern cpp_buffer *cpp_pop_buffer       PARAMS ((cpp_reader *));
 651 extern void cpp_scan_buffer             PARAMS ((cpp_reader *, cpp_printer *));
 652 extern void cpp_scan_buffer_nooutput    PARAMS ((cpp_reader *));
 653
 654
 655
 656 /* In cpphash.c */
 657 extern int cpp_defined                  PARAMS ((cpp_reader *,
 658                                                  const unsigned char *, int));
 659
 660 /* In cppfiles.c */
 661 extern int cpp_included                 PARAMS ((cpp_reader *, const char *));
 662 extern int cpp_read_file                PARAMS ((cpp_reader *, const char *));
 663
 664 #ifdef __cplusplus
 665 }
 666 #endif
 667 #endif /* __GCC_CPPLIB__ */