gcc/cpphash.h

   1 /* Part of CPP library.
   2    Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003
   3    Free Software Foundation, Inc.
   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 /* This header defines all the internal data structures and functions
  20    that need to be visible across files.  It's called cpphash.h for
  21    historical reasons.  */
  22
  23 #ifndef GCC_CPPHASH_H
  24 #define GCC_CPPHASH_H
  25
  26 #include "hashtable.h"
  27
  28 struct directive;               /* Deliberately incomplete.  */
  29 struct pending_option;
  30 struct op;
  31
  32 #ifndef HAVE_UCHAR
  33 typedef unsigned char uchar;
  34 #endif
  35 #define U (const uchar *)  /* Intended use: U"string" */
  36
  37 #define BITS_PER_CPPCHAR_T (CHAR_BIT * sizeof (cppchar_t))
  38
  39 /* Test if a sign is valid within a preprocessing number.  */
  40 #define VALID_SIGN(c, prevc) \
  41   (((c) == '+' || (c) == '-') && \
  42    ((prevc) == 'e' || (prevc) == 'E' \
  43     || (((prevc) == 'p' || (prevc) == 'P') \
  44         && CPP_OPTION (pfile, extended_numbers))))
  45
  46 #define CPP_OPTION(PFILE, OPTION) ((PFILE)->opts.OPTION)
  47 #define CPP_BUFFER(PFILE) ((PFILE)->buffer)
  48 #define CPP_BUF_COLUMN(BUF, CUR) ((CUR) - (BUF)->line_base)
  49 #define CPP_BUF_COL(BUF) CPP_BUF_COLUMN(BUF, (BUF)->cur)
  50
  51 /* Maximum nesting of cpp_buffers.  We use a static limit, partly for
  52    efficiency, and partly to limit runaway recursion.  */
  53 #define CPP_STACK_MAX 200
  54
  55 /* Host alignment handling.  */
  56 struct dummy
  57 {
  58   char c;
  59   union
  60   {
  61     double d;
  62     int *p;
  63   } u;
  64 };
  65
  66 #define DEFAULT_ALIGNMENT offsetof (struct dummy, u)
  67 #define CPP_ALIGN2(size, align) (((size) + ((align) - 1)) & ~((align) - 1))
  68 #define CPP_ALIGN(size) CPP_ALIGN2 (size, DEFAULT_ALIGNMENT)
  69
  70 /* Each macro definition is recorded in a cpp_macro structure.
  71    Variadic macros cannot occur with traditional cpp.  */
  72 struct cpp_macro
  73 {
  74   /* Parameters, if any.  */
  75   cpp_hashnode **params;
  76
  77   /* Replacement tokens (ISO) or replacement text (traditional).  See
  78      comment at top of cpptrad.c for how traditional function-like
  79      macros are encoded.  */
  80   union
  81   {
  82     cpp_token *tokens;
  83     const uchar *text;
  84   } exp;
  85
  86   /* Definition line number.  */
  87   unsigned int line;
  88
  89   /* Number of tokens in expansion, or bytes for traditional macros.  */
  90   unsigned int count;
  91
  92   /* Number of parameters.  */
  93   unsigned short paramc;
  94
  95   /* If a function-like macro.  */
  96   unsigned int fun_like : 1;
  97
  98   /* If a variadic macro.  */
  99   unsigned int variadic : 1;
 100
 101   /* If macro defined in system header.  */
 102   unsigned int syshdr   : 1;
 103
 104   /* Nonzero if it has been expanded or had its existence tested.  */
 105   unsigned int used     : 1;
 106 };
 107
 108 #define _cpp_mark_macro_used(NODE) do {                                 \
 109   if ((NODE)->type == NT_MACRO && !((NODE)->flags & NODE_BUILTIN))      \
 110     (NODE)->value.macro->used = 1; } while (0)
 111
 112 /* A generic memory buffer, and operations on it.  */
 113 typedef struct _cpp_buff _cpp_buff;
 114 struct _cpp_buff
 115 {
 116   struct _cpp_buff *next;
 117   unsigned char *base, *cur, *limit;
 118 };
 119
 120 extern _cpp_buff *_cpp_get_buff (cpp_reader *, size_t);
 121 extern void _cpp_release_buff (cpp_reader *, _cpp_buff *);
 122 extern void _cpp_extend_buff (cpp_reader *, _cpp_buff **, size_t);
 123 extern _cpp_buff *_cpp_append_extend_buff (cpp_reader *, _cpp_buff *, size_t);
 124 extern void _cpp_free_buff (_cpp_buff *);
 125 extern unsigned char *_cpp_aligned_alloc (cpp_reader *, size_t);
 126 extern unsigned char *_cpp_unaligned_alloc (cpp_reader *, size_t);
 127
 128 #define BUFF_ROOM(BUFF) (size_t) ((BUFF)->limit - (BUFF)->cur)
 129 #define BUFF_FRONT(BUFF) ((BUFF)->cur)
 130 #define BUFF_LIMIT(BUFF) ((BUFF)->limit)
 131
 132 /* #include types.  */
 133 enum include_type {IT_INCLUDE, IT_INCLUDE_NEXT, IT_IMPORT, IT_CMDLINE};
 134
 135 union utoken
 136 {
 137   const cpp_token *token;
 138   const cpp_token **ptoken;
 139 };
 140
 141 /* A "run" of tokens; part of a chain of runs.  */
 142 typedef struct tokenrun tokenrun;
 143 struct tokenrun
 144 {
 145   tokenrun *next, *prev;
 146   cpp_token *base, *limit;
 147 };
 148
 149 /* Accessor macros for struct cpp_context.  */
 150 #define FIRST(c) ((c)->u.iso.first)
 151 #define LAST(c) ((c)->u.iso.last)
 152 #define CUR(c) ((c)->u.trad.cur)
 153 #define RLIMIT(c) ((c)->u.trad.rlimit)
 154
 155 typedef struct cpp_context cpp_context;
 156 struct cpp_context
 157 {
 158   /* Doubly-linked list.  */
 159   cpp_context *next, *prev;
 160
 161   union
 162   {
 163     /* For ISO macro expansion.  Contexts other than the base context
 164        are contiguous tokens.  e.g. macro expansions, expanded
 165        argument tokens.  */
 166     struct
 167     {
 168       union utoken first;
 169       union utoken last;
 170     } iso;
 171
 172     /* For traditional macro expansion.  */
 173     struct
 174     {
 175       const uchar *cur;
 176       const uchar *rlimit;
 177     } trad;
 178   } u;
 179
 180   /* If non-NULL, a buffer used for storage related to this context.
 181      When the context is popped, the buffer is released.  */
 182   _cpp_buff *buff;
 183
 184   /* For a macro context, the macro node, otherwise NULL.  */
 185   cpp_hashnode *macro;
 186
 187   /* True if utoken element is token, else ptoken.  */
 188   bool direct_p;
 189 };
 190
 191 struct lexer_state
 192 {
 193   /* Nonzero if first token on line is CPP_HASH.  */
 194   unsigned char in_directive;
 195
 196   /* Nonzero if in a directive that will handle padding tokens itself.
 197      #include needs this to avoid problems with computed include and
 198      spacing between tokens.  */
 199   unsigned char directive_wants_padding;
 200
 201   /* True if we are skipping a failed conditional group.  */
 202   unsigned char skipping;
 203
 204   /* Nonzero if in a directive that takes angle-bracketed headers.  */
 205   unsigned char angled_headers;
 206
 207   /* Nonzero if in a #if or #elif directive.  */
 208   unsigned char in_expression;
 209
 210   /* Nonzero to save comments.  Turned off if discard_comments, and in
 211      all directives apart from #define.  */
 212   unsigned char save_comments;
 213
 214   /* Nonzero if lexing __VA_ARGS__ is valid.  */
 215   unsigned char va_args_ok;
 216
 217   /* Nonzero if lexing poisoned identifiers is valid.  */
 218   unsigned char poisoned_ok;
 219
 220   /* Nonzero to prevent macro expansion.  */
 221   unsigned char prevent_expansion;
 222
 223   /* Nonzero when parsing arguments to a function-like macro.  */
 224   unsigned char parsing_args;
 225
 226   /* Nonzero to skip evaluating part of an expression.  */
 227   unsigned int skip_eval;
 228 };
 229
 230 /* Special nodes - identifiers with predefined significance.  */
 231 struct spec_nodes
 232 {
 233   cpp_hashnode *n_defined;              /* defined operator */
 234   cpp_hashnode *n_true;                 /* C++ keyword true */
 235   cpp_hashnode *n_false;                /* C++ keyword false */
 236   cpp_hashnode *n__VA_ARGS__;           /* C99 vararg macros */
 237 };
 238
 239 typedef struct _cpp_line_note _cpp_line_note;
 240 struct _cpp_line_note
 241 {
 242   /* Location in the clean line the note refers to.  */
 243   const uchar *pos;
 244
 245   /* Type of note.  The 9 'from' trigraph characters represent those
 246      trigraphs, '\\' an escaped newline, ' ' an escaped newline with
 247      intervening space, and anything else is invalid.  */
 248   unsigned int type;
 249 };
 250
 251 /* Represents the contents of a file cpplib has read in.  */
 252 struct cpp_buffer
 253 {
 254   const uchar *cur;             /* Current location.  */
 255   const uchar *line_base;       /* Start of current physical line.  */
 256   const uchar *next_line;       /* Start of to-be-cleaned logical line.  */
 257
 258   const uchar *buf;             /* Entire character buffer.  */
 259   const uchar *rlimit;          /* Writable byte at end of file.  */
 260
 261   _cpp_line_note *notes;        /* Array of notes.  */
 262   unsigned int cur_note;        /* Next note to process.  */
 263   unsigned int notes_used;      /* Number of notes.  */
 264   unsigned int notes_cap;       /* Size of allocated array.  */
 265
 266   struct cpp_buffer *prev;
 267
 268   /* Pointer into the include table; non-NULL if this is a file
 269      buffer.  Used for include_next and to record control macros.  */
 270   struct include_file *inc;
 271
 272   /* Value of if_stack at start of this file.
 273      Used to prohibit unmatched #endif (etc) in an include file.  */
 274   struct if_stack *if_stack;
 275
 276   /* True if we need to get the next clean line.  */
 277   bool need_line;
 278
 279   /* True if we have already warned about C++ comments in this file.
 280      The warning happens only for C89 extended mode with -pedantic on,
 281      or for -Wtraditional, and only once per file (otherwise it would
 282      be far too noisy).  */
 283   unsigned char warned_cplusplus_comments;
 284
 285   /* True if we don't process trigraphs and escaped newlines.  True
 286      for preprocessed input, command line directives, and _Pragma
 287      buffers.  */
 288   unsigned char from_stage3;
 289
 290   /* Nonzero means that the directory to start searching for ""
 291      include files has been calculated and stored in "dir" below.  */
 292   unsigned char search_cached;
 293
 294   /* At EOF, a buffer is automatically popped.  If RETURN_AT_EOF is
 295      true, a CPP_EOF token is then returned.  Otherwise, the next
 296      token from the enclosing buffer is returned.  */
 297   bool return_at_eof;
 298
 299   /* The directory of the this buffer's file.  Its NAME member is not
 300      allocated, so we don't need to worry about freeing it.  */
 301   struct cpp_path dir;
 302
 303   /* Used for buffer overlays by cpptrad.c.  */
 304   const uchar *saved_cur, *saved_rlimit;
 305 };
 306
 307 /* A cpp_reader encapsulates the "state" of a pre-processor run.
 308    Applying cpp_get_token repeatedly yields a stream of pre-processor
 309    tokens.  Usually, there is only one cpp_reader object active.  */
 310 struct cpp_reader
 311 {
 312   /* Top of buffer stack.  */
 313   cpp_buffer *buffer;
 314
 315   /* Overlaid buffer (can be different after processing #include).  */
 316   cpp_buffer *overlaid_buffer;
 317
 318   /* Lexer state.  */
 319   struct lexer_state state;
 320
 321   /* Source line tracking.  */
 322   struct line_maps line_maps;
 323   const struct line_map *map;
 324   unsigned int line;
 325
 326   /* The line of the '#' of the current directive.  */
 327   unsigned int directive_line;
 328
 329   /* Memory buffers.  */
 330   _cpp_buff *a_buff;            /* Aligned permanent storage.  */
 331   _cpp_buff *u_buff;            /* Unaligned permanent storage.  */
 332   _cpp_buff *free_buffs;        /* Free buffer chain.  */
 333
 334   /* Context stack.  */
 335   struct cpp_context base_context;
 336   struct cpp_context *context;
 337
 338   /* If in_directive, the directive if known.  */
 339   const struct directive *directive;
 340
 341   /* Search paths for include files.  */
 342   struct cpp_path *quote_include;       /* "" */
 343   struct cpp_path *bracket_include;     /* <> */
 344
 345   /* Multiple include optimization.  */
 346   const cpp_hashnode *mi_cmacro;
 347   const cpp_hashnode *mi_ind_cmacro;
 348   bool mi_valid;
 349
 350   /* Lexing.  */
 351   cpp_token *cur_token;
 352   tokenrun base_run, *cur_run;
 353   unsigned int lookaheads;
 354
 355   /* Nonzero prevents the lexer from re-using the token runs.  */
 356   unsigned int keep_tokens;
 357
 358   /* Error counter for exit code.  */
 359   unsigned int errors;
 360
 361   /* Buffer to hold macro definition string.  */
 362   unsigned char *macro_buffer;
 363   unsigned int macro_buffer_len;
 364
 365   /* Tree of other included files.  See cppfiles.c.  */
 366   struct splay_tree_s *all_include_files;
 367
 368   /* Current maximum length of directory names in the search path
 369      for include files.  (Altered as we get more of them.)  */
 370   unsigned int max_include_len;
 371
 372   /* Date and time text.  Calculated together if either is requested.  */
 373   const uchar *date;
 374   const uchar *time;
 375
 376   /* EOF token, and a token forcing paste avoidance.  */
 377   cpp_token avoid_paste;
 378   cpp_token eof;
 379
 380   /* Opaque handle to the dependencies of mkdeps.c.  */
 381   struct deps *deps;
 382
 383   /* Obstack holding all macro hash nodes.  This never shrinks.
 384      See cpphash.c */
 385   struct obstack hash_ob;
 386
 387   /* Obstack holding buffer and conditional structures.  This is a
 388      real stack.  See cpplib.c.  */
 389   struct obstack buffer_ob;
 390
 391   /* Pragma table - dynamic, because a library user can add to the
 392      list of recognized pragmas.  */
 393   struct pragma_entry *pragmas;
 394
 395   /* Call backs.  */
 396   struct cpp_callbacks cb;
 397
 398   /* Identifier hash table.  */
 399   struct ht *hash_table;
 400
 401   /* Expression parser stack.  */
 402   struct op *op_stack, *op_limit;
 403
 404   /* User visible options.  */
 405   struct cpp_options opts;
 406
 407   /* Special nodes - identifiers with predefined significance to the
 408      preprocessor.  */
 409   struct spec_nodes spec_nodes;
 410
 411   /* Nonzero means don't look for #include "foo" the source-file
 412      directory.  */
 413   unsigned char quote_ignores_source_dir;
 414
 415   /* Whether cpplib owns the hashtable.  */
 416   unsigned char our_hashtable;
 417
 418   /* Traditional preprocessing output buffer (a logical line).  */
 419   struct
 420   {
 421     uchar *base;
 422     uchar *limit;
 423     uchar *cur;
 424     unsigned int first_line;
 425   } out;
 426
 427   /* Used to save the original line number during traditional
 428      preprocessing.  */
 429   unsigned int saved_line;
 430
 431   /* A saved list of the defined macros, for dependency checking
 432      of precompiled headers.  */
 433   struct cpp_savedstate *savedstate;
 434 };
 435
 436 /* Character classes.  Based on the more primitive macros in safe-ctype.h.
 437    If the definition of `numchar' looks odd to you, please look up the
 438    definition of a pp-number in the C standard [section 6.4.8 of C99].
 439
 440    In the unlikely event that characters other than \r and \n enter
 441    the set is_vspace, the macro handle_newline() in cpplex.c must be
 442    updated.  */
 443 #define _dollar_ok(x)   ((x) == '$' && CPP_OPTION (pfile, dollars_in_ident))
 444
 445 #define is_idchar(x)    (ISIDNUM(x) || _dollar_ok(x))
 446 #define is_numchar(x)   ISIDNUM(x)
 447 #define is_idstart(x)   (ISIDST(x) || _dollar_ok(x))
 448 #define is_numstart(x)  ISDIGIT(x)
 449 #define is_hspace(x)    ISBLANK(x)
 450 #define is_vspace(x)    IS_VSPACE(x)
 451 #define is_nvspace(x)   IS_NVSPACE(x)
 452 #define is_space(x)     IS_SPACE_OR_NUL(x)
 453
 454 /* This table is constant if it can be initialized at compile time,
 455    which is the case if cpp was compiled with GCC >=2.7, or another
 456    compiler that supports C99.  */
 457 #if HAVE_DESIGNATED_INITIALIZERS
 458 extern const unsigned char _cpp_trigraph_map[UCHAR_MAX + 1];
 459 #else
 460 extern unsigned char _cpp_trigraph_map[UCHAR_MAX + 1];
 461 #endif
 462
 463 /* Macros.  */
 464
 465 #define CPP_IN_SYSTEM_HEADER(PFILE) ((PFILE)->map && (PFILE)->map->sysp)
 466 #define CPP_PEDANTIC(PF) CPP_OPTION (PF, pedantic)
 467 #define CPP_WTRADITIONAL(PF) CPP_OPTION (PF, warn_traditional)
 468
 469 /* In cpperror.c  */
 470 extern int _cpp_begin_message (cpp_reader *, int, unsigned int, unsigned int);
 471
 472 /* In cppmacro.c */
 473 extern void _cpp_free_definition (cpp_hashnode *);
 474 extern bool _cpp_create_definition (cpp_reader *, cpp_hashnode *);
 475 extern void _cpp_pop_context (cpp_reader *);
 476 extern void _cpp_push_text_context (cpp_reader *, cpp_hashnode *,
 477                                     const uchar *, size_t);
 478 extern bool _cpp_save_parameter (cpp_reader *, cpp_macro *, cpp_hashnode *);
 479 extern bool _cpp_arguments_ok (cpp_reader *, cpp_macro *, const cpp_hashnode *,
 480                                unsigned int);
 481 extern const uchar *_cpp_builtin_macro_text (cpp_reader *, cpp_hashnode *);
 482 int _cpp_warn_if_unused_macro (cpp_reader *, cpp_hashnode *, void *);
 483 /* In cpphash.c */
 484 extern void _cpp_init_hashtable (cpp_reader *, hash_table *);
 485 extern void _cpp_destroy_hashtable (cpp_reader *);
 486
 487 /* In cppfiles.c */
 488 extern void _cpp_fake_include (cpp_reader *, const char *);
 489 extern void _cpp_never_reread (struct include_file *);
 490 extern bool _cpp_read_file (cpp_reader *, const char *);
 491 extern bool _cpp_execute_include (cpp_reader *, const char *, int,
 492                                   enum include_type);
 493 extern int _cpp_compare_file_date (cpp_reader *, const char *, int);
 494 extern void _cpp_report_missing_guards (cpp_reader *);
 495 extern void _cpp_init_includes (cpp_reader *);
 496 extern void _cpp_cleanup_includes (cpp_reader *);
 497 extern void _cpp_pop_file_buffer (cpp_reader *, struct include_file *);
 498
 499 /* In cppexp.c */
 500 extern bool _cpp_parse_expr (cpp_reader *);
 501 extern struct op *_cpp_expand_op_stack (cpp_reader *);
 502
 503 /* In cpplex.c */
 504 extern void _cpp_process_line_notes (cpp_reader *, int);
 505 extern void _cpp_clean_line (cpp_reader *);
 506 extern bool _cpp_get_fresh_line (cpp_reader *);
 507 extern bool _cpp_skip_block_comment (cpp_reader *);
 508 extern cpp_token *_cpp_temp_token (cpp_reader *);
 509 extern const cpp_token *_cpp_lex_token (cpp_reader *);
 510 extern cpp_token *_cpp_lex_direct (cpp_reader *);
 511 extern int _cpp_equiv_tokens (const cpp_token *, const cpp_token *);
 512 extern void _cpp_init_tokenrun (tokenrun *, unsigned int);
 513
 514 /* In cppinit.c.  */
 515 extern void _cpp_maybe_push_include_file (cpp_reader *);
 516
 517 /* In cpplib.c */
 518 extern int _cpp_test_assertion (cpp_reader *, unsigned int *);
 519 extern int _cpp_handle_directive (cpp_reader *, int);
 520 extern void _cpp_define_builtin (cpp_reader *, const char *);
 521 extern char ** _cpp_save_pragma_names (cpp_reader *);
 522 extern void _cpp_restore_pragma_names (cpp_reader *, char **);
 523 extern void _cpp_do__Pragma (cpp_reader *);
 524 extern void _cpp_init_directives (cpp_reader *);
 525 extern void _cpp_init_internal_pragmas (cpp_reader *);
 526 extern void _cpp_do_file_change (cpp_reader *, enum lc_reason, const char *,
 527                                  unsigned int, unsigned int);
 528 extern void _cpp_pop_buffer (cpp_reader *);
 529
 530 /* In cpptrad.c.  */
 531 extern bool scan_out_logical_line (cpp_reader *, cpp_macro *);
 532 extern bool _cpp_read_logical_line_trad (cpp_reader *);
 533 extern void _cpp_overlay_buffer (cpp_reader *pfile, const uchar *, size_t);
 534 extern void _cpp_remove_overlay (cpp_reader *);
 535 extern bool _cpp_create_trad_definition (cpp_reader *, cpp_macro *);
 536 extern bool _cpp_expansions_different_trad (const cpp_macro *,
 537                                             const cpp_macro *);
 538 extern uchar *_cpp_copy_replacement_text (const cpp_macro *, uchar *);
 539 extern size_t _cpp_replacement_text_len (const cpp_macro *);
 540
 541 /* In cppcharset.c.  */
 542 cppchar_t _cpp_valid_ucn (cpp_reader *, const uchar **, int identifer_p);
 543
 544 /* Utility routines and macros.  */
 545 #define DSC(str) (const uchar *)str, sizeof str - 1
 546 #define xnew(T)         (T *) xmalloc (sizeof(T))
 547 #define xcnew(T)        (T *) xcalloc (1, sizeof(T))
 548 #define xnewvec(T, N)   (T *) xmalloc (sizeof(T) * (N))
 549 #define xcnewvec(T, N)  (T *) xcalloc (N, sizeof(T))
 550 #define xobnew(O, T)    (T *) obstack_alloc (O, sizeof(T))
 551
 552 /* These are inline functions instead of macros so we can get type
 553    checking.  */
 554 static inline int ustrcmp (const uchar *, const uchar *);
 555 static inline int ustrncmp (const uchar *, const uchar *, size_t);
 556 static inline size_t ustrlen (const uchar *);
 557 static inline uchar *uxstrdup (const uchar *);
 558 static inline uchar *ustrchr (const uchar *, int);
 559 static inline int ufputs (const uchar *, FILE *);
 560
 561 static inline int
 562 ustrcmp (const uchar *s1, const uchar *s2)
 563 {
 564   return strcmp ((const char *)s1, (const char *)s2);
 565 }
 566
 567 static inline int
 568 ustrncmp (const uchar *s1, const uchar *s2, size_t n)
 569 {
 570   return strncmp ((const char *)s1, (const char *)s2, n);
 571 }
 572
 573 static inline size_t
 574 ustrlen (const uchar *s1)
 575 {
 576   return strlen ((const char *)s1);
 577 }
 578
 579 static inline uchar *
 580 uxstrdup (const uchar *s1)
 581 {
 582   return (uchar *) xstrdup ((const char *)s1);
 583 }
 584
 585 static inline uchar *
 586 ustrchr (const uchar *s1, int c)
 587 {
 588   return (uchar *) strchr ((const char *)s1, c);
 589 }
 590
 591 static inline int
 592 ufputs (const uchar *s, FILE *f)
 593 {
 594   return fputs ((const char *)s, f);
 595 }
 596
 597 #endif /* ! GCC_CPPHASH_H */