gcc/cpphash.h

   1 /* Part of CPP library.
   2    Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002
   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 typedef unsigned char uchar;
  33 #define U (const uchar *)  /* Intended use: U"string" */
  34
  35 #define BITS_PER_CPPCHAR_T (CHAR_BIT * sizeof (cppchar_t))
  36
  37 /* Test if a sign is valid within a preprocessing number.  */
  38 #define VALID_SIGN(c, prevc) \
  39   (((c) == '+' || (c) == '-') && \
  40    ((prevc) == 'e' || (prevc) == 'E' \
  41     || (((prevc) == 'p' || (prevc) == 'P') \
  42         && CPP_OPTION (pfile, extended_numbers))))
  43
  44 #define CPP_OPTION(PFILE, OPTION) ((PFILE)->opts.OPTION)
  45 #define CPP_BUFFER(PFILE) ((PFILE)->buffer)
  46 #define CPP_BUF_COLUMN(BUF, CUR) ((CUR) - (BUF)->line_base + (BUF)->col_adjust)
  47 #define CPP_BUF_COL(BUF) CPP_BUF_COLUMN(BUF, (BUF)->cur)
  48
  49 /* Maximum nesting of cpp_buffers.  We use a static limit, partly for
  50    efficiency, and partly to limit runaway recursion.  */
  51 #define CPP_STACK_MAX 200
  52
  53 /* Host alignment handling.  */
  54 struct dummy
  55 {
  56   char c;
  57   union
  58   {
  59     double d;
  60     int *p;
  61   } u;
  62 };
  63
  64 #define DEFAULT_ALIGNMENT offsetof (struct dummy, u)
  65 #define CPP_ALIGN2(size, align) (((size) + ((align) - 1)) & ~((align) - 1))
  66 #define CPP_ALIGN(size) CPP_ALIGN2 (size, DEFAULT_ALIGNMENT)
  67
  68 /* Each macro definition is recorded in a cpp_macro structure.
  69    Variadic macros cannot occur with traditional cpp.  */
  70 struct cpp_macro
  71 {
  72   /* Parameters, if any.  */
  73   cpp_hashnode **params;
  74
  75   /* Replacement tokens (ISO) or replacement text (traditional).  See
  76      comment at top of cpptrad.c for how traditional function-like
  77      macros are encoded.  */
  78   union
  79   {
  80     cpp_token *tokens;
  81     const uchar *text;
  82   } exp;
  83
  84   /* Definition line number.  */
  85   unsigned int line;
  86
  87   /* Number of tokens in expansion, or bytes for traditional macros.  */
  88   unsigned int count;
  89
  90   /* Number of parameters.  */
  91   unsigned short paramc;
  92
  93   /* If a function-like macro.  */
  94   unsigned int fun_like : 1;
  95
  96   /* If a variadic macro.  */
  97   unsigned int variadic : 1;
  98
  99   /* If macro defined in system header.  */
 100   unsigned int syshdr   : 1;
 101 };
 102
 103 /* A generic memory buffer, and operations on it.  */
 104 typedef struct _cpp_buff _cpp_buff;
 105 struct _cpp_buff
 106 {
 107   struct _cpp_buff *next;
 108   unsigned char *base, *cur, *limit;
 109 };
 110
 111 extern _cpp_buff *_cpp_get_buff PARAMS ((cpp_reader *, size_t));
 112 extern void _cpp_release_buff PARAMS ((cpp_reader *, _cpp_buff *));
 113 extern void _cpp_extend_buff PARAMS ((cpp_reader *, _cpp_buff **, size_t));
 114 extern _cpp_buff *_cpp_append_extend_buff PARAMS ((cpp_reader *, _cpp_buff *,
 115                                                    size_t));
 116 extern void _cpp_free_buff PARAMS ((_cpp_buff *));
 117 extern unsigned char *_cpp_aligned_alloc PARAMS ((cpp_reader *, size_t));
 118 extern unsigned char *_cpp_unaligned_alloc PARAMS ((cpp_reader *, size_t));
 119
 120 #define BUFF_ROOM(BUFF) (size_t) ((BUFF)->limit - (BUFF)->cur)
 121 #define BUFF_FRONT(BUFF) ((BUFF)->cur)
 122 #define BUFF_LIMIT(BUFF) ((BUFF)->limit)
 123
 124 /* List of directories to look for include files in.  */
 125 struct search_path
 126 {
 127   struct search_path *next;
 128
 129   /* NOTE: NAME may not be null terminated for the case of the current
 130      file's directory!  */
 131   const char *name;
 132   unsigned int len;
 133   /* We use these to tell if the directory mentioned here is a duplicate
 134      of an earlier directory on the search path.  */
 135   ino_t ino;
 136   dev_t dev;
 137   /* Non-zero if it is a system include directory.  */
 138   int sysp;
 139   /* Mapping of file names for this directory.  Only used on MS-DOS
 140      and related platforms.  */
 141   struct file_name_map *name_map;
 142 };
 143
 144 /* #include types.  */
 145 enum include_type {IT_INCLUDE, IT_INCLUDE_NEXT, IT_IMPORT, IT_CMDLINE};
 146
 147 union utoken
 148 {
 149   const cpp_token *token;
 150   const cpp_token **ptoken;
 151 };
 152
 153 /* A "run" of tokens; part of a chain of runs.  */
 154 typedef struct tokenrun tokenrun;
 155 struct tokenrun
 156 {
 157   tokenrun *next, *prev;
 158   cpp_token *base, *limit;
 159 };
 160
 161 /* Accessor macros for struct cpp_context.  */
 162 #define FIRST(c) (c->u.iso.first)
 163 #define LAST(c) (c->u.iso.last)
 164 #define CUR(c) (c->u.trad.cur)
 165 #define RLIMIT(c) (c->u.trad.rlimit)
 166
 167 typedef struct cpp_context cpp_context;
 168 struct cpp_context
 169 {
 170   /* Doubly-linked list.  */
 171   cpp_context *next, *prev;
 172
 173   union
 174   {
 175     /* For ISO macro expansion.  Contexts other than the base context
 176        are contiguous tokens.  e.g. macro expansions, expanded
 177        argument tokens.  */
 178     struct
 179     {
 180       union utoken first;
 181       union utoken last;
 182     } iso;
 183
 184     /* For traditional macro expansion.  */
 185     struct
 186     {
 187       const uchar *cur;
 188       const uchar *rlimit;
 189     } trad;
 190   } u;
 191
 192   /* If non-NULL, a buffer used for storage related to this context.
 193      When the context is popped, the buffer is released.  */
 194   _cpp_buff *buff;
 195
 196   /* For a macro context, the macro node, otherwise NULL.  */
 197   cpp_hashnode *macro;
 198
 199   /* True if utoken element is token, else ptoken.  */
 200   bool direct_p;
 201 };
 202
 203 struct lexer_state
 204 {
 205   /* Nonzero if first token on line is CPP_HASH.  */
 206   unsigned char in_directive;
 207
 208   /* True if we are skipping a failed conditional group.  */
 209   unsigned char skipping;
 210
 211   /* Nonzero if in a directive that takes angle-bracketed headers.  */
 212   unsigned char angled_headers;
 213
 214   /* Nonzero if in a #if or #elif directive.  */
 215   unsigned char in_expression;
 216
 217   /* Nonzero to save comments.  Turned off if discard_comments, and in
 218      all directives apart from #define.  */
 219   unsigned char save_comments;
 220
 221   /* Nonzero if we're mid-comment.  */
 222   unsigned char lexing_comment;
 223
 224   /* Nonzero if lexing __VA_ARGS__ is valid.  */
 225   unsigned char va_args_ok;
 226
 227   /* Nonzero if lexing poisoned identifiers is valid.  */
 228   unsigned char poisoned_ok;
 229
 230   /* Nonzero to prevent macro expansion.  */
 231   unsigned char prevent_expansion;
 232
 233   /* Nonzero when parsing arguments to a function-like macro.  */
 234   unsigned char parsing_args;
 235
 236   /* Nonzero to skip evaluating part of an expression.  */
 237   unsigned int skip_eval;
 238 };
 239
 240 /* Special nodes - identifiers with predefined significance.  */
 241 struct spec_nodes
 242 {
 243   cpp_hashnode *n_defined;              /* defined operator */
 244   cpp_hashnode *n_true;                 /* C++ keyword true */
 245   cpp_hashnode *n_false;                /* C++ keyword false */
 246   cpp_hashnode *n__VA_ARGS__;           /* C99 vararg macros */
 247 };
 248
 249 /* Represents the contents of a file cpplib has read in.  */
 250 struct cpp_buffer
 251 {
 252   const unsigned char *cur;      /* current position */
 253   const unsigned char *backup_to; /* if peeked character is not wanted */
 254   const unsigned char *rlimit; /* end of valid data */
 255   const unsigned char *line_base; /* start of current line */
 256
 257   struct cpp_buffer *prev;
 258
 259   const unsigned char *buf;      /* Entire character buffer.  */
 260
 261   /* Pointer into the include table; non-NULL if this is a file
 262      buffer.  Used for include_next and to record control macros.  */
 263   struct include_file *inc;
 264
 265   /* Value of if_stack at start of this file.
 266      Used to prohibit unmatched #endif (etc) in an include file.  */
 267   struct if_stack *if_stack;
 268
 269   /* Token column position adjustment owing to tabs in whitespace.  */
 270   unsigned int col_adjust;
 271
 272   /* Contains PREV_WHITE and/or AVOID_LPASTE.  */
 273   unsigned char saved_flags;
 274
 275   /* Because of the way the lexer works, -Wtrigraphs can sometimes
 276      warn twice for the same trigraph.  This helps prevent that.  */
 277   const unsigned char *last_Wtrigraphs;
 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 search_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   /* The next -include-d file; NULL if they all are done.  If it
 342      points to NULL, the last one is in progress, and
 343      _cpp_maybe_push_include_file has yet to restore the line map.  */
 344   struct pending_option **next_include_file;
 345
 346   /* Multiple inlcude optimisation.  */
 347   const cpp_hashnode *mi_cmacro;
 348   const cpp_hashnode *mi_ind_cmacro;
 349   bool mi_valid;
 350
 351   /* Lexing.  */
 352   cpp_token *cur_token;
 353   tokenrun base_run, *cur_run;
 354   unsigned int lookaheads;
 355
 356   /* Non-zero prevents the lexer from re-using the token runs.  */
 357   unsigned int keep_tokens;
 358
 359   /* Error counter for exit code.  */
 360   unsigned int errors;
 361
 362   /* Buffer to hold macro definition string.  */
 363   unsigned char *macro_buffer;
 364   unsigned int macro_buffer_len;
 365
 366   /* Tree of other included files.  See cppfiles.c.  */
 367   struct splay_tree_s *all_include_files;
 368
 369   /* Current maximum length of directory names in the search path
 370      for include files.  (Altered as we get more of them.)  */
 371   unsigned int max_include_len;
 372
 373   /* Date and time tokens.  Calculated together if either is requested.  */
 374   cpp_token date;
 375   cpp_token time;
 376
 377   /* EOF token, and a token forcing paste avoidance.  */
 378   cpp_token avoid_paste;
 379   cpp_token eof;
 380
 381   /* Opaque handle to the dependencies of mkdeps.c.  Used by -M etc.  */
 382   struct deps *deps;
 383
 384   /* Obstack holding all macro hash nodes.  This never shrinks.
 385      See cpphash.c */
 386   struct obstack hash_ob;
 387
 388   /* Obstack holding buffer and conditional structures.  This is a
 389      real stack.  See cpplib.c.  */
 390   struct obstack buffer_ob;
 391
 392   /* Pragma table - dynamic, because a library user can add to the
 393      list of recognized pragmas.  */
 394   struct pragma_entry *pragmas;
 395
 396   /* Call backs.  */
 397   struct cpp_callbacks cb;
 398
 399   /* Identifier hash table.  */
 400   struct ht *hash_table;
 401
 402   /* Expression parser stack.  */
 403   struct op *op_stack, *op_limit;
 404
 405   /* User visible options.  */
 406   struct cpp_options opts;
 407
 408   /* Special nodes - identifiers with predefined significance to the
 409      preprocessor.  */
 410   struct spec_nodes spec_nodes;
 411
 412   /* Whether cpplib owns the hashtable.  */
 413   unsigned char our_hashtable;
 414
 415   /* Traditional preprocessing output buffer (a logical line).  */
 416   struct
 417   {
 418     uchar *base;
 419     uchar *limit;
 420     uchar *cur;
 421     unsigned int first_line;
 422   } out;
 423
 424   /* Used to save the original line number during traditional
 425      preprocessing.  */
 426   unsigned int saved_line;
 427 };
 428
 429 /* Character classes.  Based on the more primitive macros in safe-ctype.h.
 430    If the definition of `numchar' looks odd to you, please look up the
 431    definition of a pp-number in the C standard [section 6.4.8 of C99].
 432
 433    In the unlikely event that characters other than \r and \n enter
 434    the set is_vspace, the macro handle_newline() in cpplex.c must be
 435    updated.  */
 436 #define _dollar_ok(x)   ((x) == '$' && CPP_OPTION (pfile, dollars_in_ident))
 437
 438 #define is_idchar(x)    (ISIDNUM(x) || _dollar_ok(x))
 439 #define is_numchar(x)   ISIDNUM(x)
 440 #define is_idstart(x)   (ISIDST(x) || _dollar_ok(x))
 441 #define is_numstart(x)  ISDIGIT(x)
 442 #define is_hspace(x)    ISBLANK(x)
 443 #define is_vspace(x)    IS_VSPACE(x)
 444 #define is_nvspace(x)   IS_NVSPACE(x)
 445 #define is_space(x)     IS_SPACE_OR_NUL(x)
 446
 447 /* This table is constant if it can be initialized at compile time,
 448    which is the case if cpp was compiled with GCC >=2.7, or another
 449    compiler that supports C99.  */
 450 #if HAVE_DESIGNATED_INITIALIZERS
 451 extern const unsigned char _cpp_trigraph_map[UCHAR_MAX + 1];
 452 #else
 453 extern unsigned char _cpp_trigraph_map[UCHAR_MAX + 1];
 454 #endif
 455
 456 /* Macros.  */
 457
 458 #define CPP_PRINT_DEPS(PFILE) CPP_OPTION (PFILE, print_deps)
 459 #define CPP_IN_SYSTEM_HEADER(PFILE) ((PFILE)->map && (PFILE)->map->sysp)
 460 #define CPP_PEDANTIC(PF) CPP_OPTION (PF, pedantic)
 461 #define CPP_WTRADITIONAL(PF) CPP_OPTION (PF, warn_traditional)
 462
 463 /* In cpperror.c  */
 464 extern int _cpp_begin_message PARAMS ((cpp_reader *, int,
 465                                        unsigned int, unsigned int));
 466
 467 /* In cppmacro.c */
 468 extern void _cpp_free_definition        PARAMS ((cpp_hashnode *));
 469 extern bool _cpp_create_definition      PARAMS ((cpp_reader *, cpp_hashnode *));
 470 extern void _cpp_pop_context            PARAMS ((cpp_reader *));
 471 extern void _cpp_push_text_context      PARAMS ((cpp_reader *, cpp_hashnode *,
 472                                                  const uchar *, size_t));
 473 extern bool _cpp_save_parameter         PARAMS ((cpp_reader *, cpp_macro *,
 474                                                  cpp_hashnode *));
 475 extern bool _cpp_arguments_ok           PARAMS ((cpp_reader *, cpp_macro *,
 476                                                  const cpp_hashnode *,
 477                                                  unsigned int));
 478
 479 /* In cpphash.c */
 480 extern void _cpp_init_hashtable         PARAMS ((cpp_reader *, hash_table *));
 481 extern void _cpp_destroy_hashtable      PARAMS ((cpp_reader *));
 482
 483 /* In cppfiles.c */
 484 extern void _cpp_fake_include           PARAMS ((cpp_reader *, const char *));
 485 extern void _cpp_never_reread           PARAMS ((struct include_file *));
 486 extern char *_cpp_simplify_pathname     PARAMS ((char *));
 487 extern bool _cpp_read_file              PARAMS ((cpp_reader *, const char *));
 488 extern bool _cpp_execute_include        PARAMS ((cpp_reader *,
 489                                                  const cpp_token *,
 490                                                  enum include_type));
 491 extern int _cpp_compare_file_date       PARAMS ((cpp_reader *,
 492                                                  const cpp_token *));
 493 extern void _cpp_report_missing_guards  PARAMS ((cpp_reader *));
 494 extern void _cpp_init_includes          PARAMS ((cpp_reader *));
 495 extern void _cpp_cleanup_includes       PARAMS ((cpp_reader *));
 496 extern void _cpp_pop_file_buffer        PARAMS ((cpp_reader *,
 497                                                  struct include_file *));
 498
 499 /* In cppexp.c */
 500 extern bool _cpp_parse_expr             PARAMS ((cpp_reader *));
 501 extern struct op *_cpp_expand_op_stack  PARAMS ((cpp_reader *));
 502
 503 /* In cpplex.c */
 504 extern cpp_token *_cpp_temp_token       PARAMS ((cpp_reader *));
 505 extern const cpp_token *_cpp_lex_token  PARAMS ((cpp_reader *));
 506 extern cpp_token *_cpp_lex_direct       PARAMS ((cpp_reader *));
 507 extern int _cpp_equiv_tokens            PARAMS ((const cpp_token *,
 508                                                  const cpp_token *));
 509 extern void _cpp_init_tokenrun          PARAMS ((tokenrun *, unsigned int));
 510
 511 /* In cppinit.c.  */
 512 extern void _cpp_maybe_push_include_file PARAMS ((cpp_reader *));
 513
 514 /* In cpplib.c */
 515 extern int _cpp_test_assertion PARAMS ((cpp_reader *, unsigned int *));
 516 extern int _cpp_handle_directive PARAMS ((cpp_reader *, int));
 517 extern void _cpp_define_builtin PARAMS ((cpp_reader *, const char *));
 518 extern void _cpp_do__Pragma     PARAMS ((cpp_reader *));
 519 extern void _cpp_init_directives PARAMS ((cpp_reader *));
 520 extern void _cpp_init_internal_pragmas PARAMS ((cpp_reader *));
 521 extern void _cpp_do_file_change PARAMS ((cpp_reader *, enum lc_reason,
 522                                          const char *,
 523                                          unsigned int, unsigned int));
 524 extern void _cpp_pop_buffer PARAMS ((cpp_reader *));
 525
 526 /* In cpptrad.c.  */
 527 extern bool _cpp_read_logical_line_trad PARAMS ((cpp_reader *));
 528 extern void _cpp_overlay_buffer PARAMS ((cpp_reader *pfile, const uchar *,
 529                                          size_t));
 530 extern void _cpp_remove_overlay PARAMS ((cpp_reader *));
 531 extern void _cpp_set_trad_context PARAMS ((cpp_reader *));
 532 extern bool _cpp_create_trad_definition PARAMS ((cpp_reader *, cpp_macro *));
 533 extern bool _cpp_expansions_different_trad PARAMS ((const cpp_macro *,
 534                                                     const cpp_macro *));
 535
 536 /* Utility routines and macros.  */
 537 #define DSC(str) (const uchar *)str, sizeof str - 1
 538 #define xnew(T)         (T *) xmalloc (sizeof(T))
 539 #define xcnew(T)        (T *) xcalloc (1, sizeof(T))
 540 #define xnewvec(T, N)   (T *) xmalloc (sizeof(T) * (N))
 541 #define xcnewvec(T, N)  (T *) xcalloc (N, sizeof(T))
 542 #define xobnew(O, T)    (T *) obstack_alloc (O, sizeof(T))
 543
 544 /* These are inline functions instead of macros so we can get type
 545    checking.  */
 546 static inline int ustrcmp       PARAMS ((const uchar *, const uchar *));
 547 static inline int ustrncmp      PARAMS ((const uchar *, const uchar *,
 548                                          size_t));
 549 static inline size_t ustrlen    PARAMS ((const uchar *));
 550 static inline uchar *uxstrdup   PARAMS ((const uchar *));
 551 static inline uchar *ustrchr    PARAMS ((const uchar *, int));
 552 static inline int ufputs        PARAMS ((const uchar *, FILE *));
 553
 554 static inline int
 555 ustrcmp (s1, s2)
 556      const uchar *s1, *s2;
 557 {
 558   return strcmp ((const char *)s1, (const char *)s2);
 559 }
 560
 561 static inline int
 562 ustrncmp (s1, s2, n)
 563      const uchar *s1, *s2;
 564      size_t n;
 565 {
 566   return strncmp ((const char *)s1, (const char *)s2, n);
 567 }
 568
 569 static inline size_t
 570 ustrlen (s1)
 571      const uchar *s1;
 572 {
 573   return strlen ((const char *)s1);
 574 }
 575
 576 static inline uchar *
 577 uxstrdup (s1)
 578      const uchar *s1;
 579 {
 580   return (uchar *) xstrdup ((const char *)s1);
 581 }
 582
 583 static inline uchar *
 584 ustrchr (s1, c)
 585      const uchar *s1;
 586      int c;
 587 {
 588   return (uchar *) strchr ((const char *)s1, c);
 589 }
 590
 591 static inline int
 592 ufputs (s, f)
 593      const uchar *s;
 594      FILE *f;
 595 {
 596   return fputs ((const char *)s, f);
 597 }
 598
 599 #endif /* ! GCC_CPPHASH_H */