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   /* Non-zero if it has been expanded or had its existence tested.  */
 103   unsigned int used     : 1;
 104 };
 105
 106 #define _cpp_mark_macro_used(NODE) do {                                 \
 107   if ((NODE)->type == NT_MACRO && !((NODE)->flags & NODE_BUILTIN))      \
 108     (NODE)->value.macro->used = 1; } while (0)
 109
 110 /* A generic memory buffer, and operations on it.  */
 111 typedef struct _cpp_buff _cpp_buff;
 112 struct _cpp_buff
 113 {
 114   struct _cpp_buff *next;
 115   unsigned char *base, *cur, *limit;
 116 };
 117
 118 extern _cpp_buff *_cpp_get_buff PARAMS ((cpp_reader *, size_t));
 119 extern void _cpp_release_buff PARAMS ((cpp_reader *, _cpp_buff *));
 120 extern void _cpp_extend_buff PARAMS ((cpp_reader *, _cpp_buff **, size_t));
 121 extern _cpp_buff *_cpp_append_extend_buff PARAMS ((cpp_reader *, _cpp_buff *,
 122                                                    size_t));
 123 extern void _cpp_free_buff PARAMS ((_cpp_buff *));
 124 extern unsigned char *_cpp_aligned_alloc PARAMS ((cpp_reader *, size_t));
 125 extern unsigned char *_cpp_unaligned_alloc PARAMS ((cpp_reader *, size_t));
 126
 127 #define BUFF_ROOM(BUFF) (size_t) ((BUFF)->limit - (BUFF)->cur)
 128 #define BUFF_FRONT(BUFF) ((BUFF)->cur)
 129 #define BUFF_LIMIT(BUFF) ((BUFF)->limit)
 130
 131 /* List of directories to look for include files in.  */
 132 struct search_path
 133 {
 134   struct search_path *next;
 135
 136   /* NOTE: NAME may not be null terminated for the case of the current
 137      file's directory!  */
 138   const char *name;
 139   unsigned int len;
 140   /* We use these to tell if the directory mentioned here is a duplicate
 141      of an earlier directory on the search path.  */
 142   ino_t ino;
 143   dev_t dev;
 144   /* Non-zero if it is a system include directory.  */
 145   int sysp;
 146   /* Mapping of file names for this directory.  Only used on MS-DOS
 147      and related platforms.  */
 148   struct file_name_map *name_map;
 149 };
 150
 151 /* #include types.  */
 152 enum include_type {IT_INCLUDE, IT_INCLUDE_NEXT, IT_IMPORT, IT_CMDLINE};
 153
 154 union utoken
 155 {
 156   const cpp_token *token;
 157   const cpp_token **ptoken;
 158 };
 159
 160 /* A "run" of tokens; part of a chain of runs.  */
 161 typedef struct tokenrun tokenrun;
 162 struct tokenrun
 163 {
 164   tokenrun *next, *prev;
 165   cpp_token *base, *limit;
 166 };
 167
 168 /* Accessor macros for struct cpp_context.  */
 169 #define FIRST(c) (c->u.iso.first)
 170 #define LAST(c) (c->u.iso.last)
 171 #define CUR(c) (c->u.trad.cur)
 172 #define RLIMIT(c) (c->u.trad.rlimit)
 173
 174 typedef struct cpp_context cpp_context;
 175 struct cpp_context
 176 {
 177   /* Doubly-linked list.  */
 178   cpp_context *next, *prev;
 179
 180   union
 181   {
 182     /* For ISO macro expansion.  Contexts other than the base context
 183        are contiguous tokens.  e.g. macro expansions, expanded
 184        argument tokens.  */
 185     struct
 186     {
 187       union utoken first;
 188       union utoken last;
 189     } iso;
 190
 191     /* For traditional macro expansion.  */
 192     struct
 193     {
 194       const uchar *cur;
 195       const uchar *rlimit;
 196     } trad;
 197   } u;
 198
 199   /* If non-NULL, a buffer used for storage related to this context.
 200      When the context is popped, the buffer is released.  */
 201   _cpp_buff *buff;
 202
 203   /* For a macro context, the macro node, otherwise NULL.  */
 204   cpp_hashnode *macro;
 205
 206   /* True if utoken element is token, else ptoken.  */
 207   bool direct_p;
 208 };
 209
 210 struct lexer_state
 211 {
 212   /* Nonzero if first token on line is CPP_HASH.  */
 213   unsigned char in_directive;
 214
 215   /* True if we are skipping a failed conditional group.  */
 216   unsigned char skipping;
 217
 218   /* Nonzero if in a directive that takes angle-bracketed headers.  */
 219   unsigned char angled_headers;
 220
 221   /* Nonzero if in a #if or #elif directive.  */
 222   unsigned char in_expression;
 223
 224   /* Nonzero to save comments.  Turned off if discard_comments, and in
 225      all directives apart from #define.  */
 226   unsigned char save_comments;
 227
 228   /* Nonzero if we're mid-comment.  */
 229   unsigned char lexing_comment;
 230
 231   /* Nonzero if lexing __VA_ARGS__ is valid.  */
 232   unsigned char va_args_ok;
 233
 234   /* Nonzero if lexing poisoned identifiers is valid.  */
 235   unsigned char poisoned_ok;
 236
 237   /* Nonzero to prevent macro expansion.  */
 238   unsigned char prevent_expansion;
 239
 240   /* Nonzero when parsing arguments to a function-like macro.  */
 241   unsigned char parsing_args;
 242
 243   /* Nonzero to skip evaluating part of an expression.  */
 244   unsigned int skip_eval;
 245 };
 246
 247 /* Special nodes - identifiers with predefined significance.  */
 248 struct spec_nodes
 249 {
 250   cpp_hashnode *n_defined;              /* defined operator */
 251   cpp_hashnode *n_true;                 /* C++ keyword true */
 252   cpp_hashnode *n_false;                /* C++ keyword false */
 253   cpp_hashnode *n__VA_ARGS__;           /* C99 vararg macros */
 254 };
 255
 256 /* Represents the contents of a file cpplib has read in.  */
 257 struct cpp_buffer
 258 {
 259   const unsigned char *cur;      /* current position */
 260   const unsigned char *backup_to; /* if peeked character is not wanted */
 261   const unsigned char *rlimit; /* end of valid data */
 262   const unsigned char *line_base; /* start of current line */
 263
 264   struct cpp_buffer *prev;
 265
 266   const unsigned char *buf;      /* Entire character buffer.  */
 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   /* Token column position adjustment owing to tabs in whitespace.  */
 277   unsigned int col_adjust;
 278
 279   /* Contains PREV_WHITE and/or AVOID_LPASTE.  */
 280   unsigned char saved_flags;
 281
 282   /* Because of the way the lexer works, -Wtrigraphs can sometimes
 283      warn twice for the same trigraph.  This helps prevent that.  */
 284   const unsigned char *last_Wtrigraphs;
 285
 286   /* True if we have already warned about C++ comments in this file.
 287      The warning happens only for C89 extended mode with -pedantic on,
 288      or for -Wtraditional, and only once per file (otherwise it would
 289      be far too noisy).  */
 290   unsigned char warned_cplusplus_comments;
 291
 292   /* True if we don't process trigraphs and escaped newlines.  True
 293      for preprocessed input, command line directives, and _Pragma
 294      buffers.  */
 295   unsigned char from_stage3;
 296
 297   /* Nonzero means that the directory to start searching for ""
 298      include files has been calculated and stored in "dir" below.  */
 299   unsigned char search_cached;
 300
 301   /* At EOF, a buffer is automatically popped.  If RETURN_AT_EOF is
 302      true, a CPP_EOF token is then returned.  Otherwise, the next
 303      token from the enclosing buffer is returned.  */
 304   bool return_at_eof;
 305
 306   /* The directory of the this buffer's file.  Its NAME member is not
 307      allocated, so we don't need to worry about freeing it.  */
 308   struct search_path dir;
 309
 310   /* Used for buffer overlays by cpptrad.c.  */
 311   const uchar *saved_cur, *saved_rlimit;
 312 };
 313
 314 /* A cpp_reader encapsulates the "state" of a pre-processor run.
 315    Applying cpp_get_token repeatedly yields a stream of pre-processor
 316    tokens.  Usually, there is only one cpp_reader object active.  */
 317 struct cpp_reader
 318 {
 319   /* Top of buffer stack.  */
 320   cpp_buffer *buffer;
 321
 322   /* Overlaid buffer (can be different after processing #include).  */
 323   cpp_buffer *overlaid_buffer;
 324
 325   /* Lexer state.  */
 326   struct lexer_state state;
 327
 328   /* Source line tracking.  */
 329   struct line_maps line_maps;
 330   const struct line_map *map;
 331   unsigned int line;
 332
 333   /* The line of the '#' of the current directive.  */
 334   unsigned int directive_line;
 335
 336   /* Memory buffers.  */
 337   _cpp_buff *a_buff;            /* Aligned permanent storage.  */
 338   _cpp_buff *u_buff;            /* Unaligned permanent storage.  */
 339   _cpp_buff *free_buffs;        /* Free buffer chain.  */
 340
 341   /* Context stack.  */
 342   struct cpp_context base_context;
 343   struct cpp_context *context;
 344
 345   /* If in_directive, the directive if known.  */
 346   const struct directive *directive;
 347
 348   /* The next -include-d file; NULL if they all are done.  If it
 349      points to NULL, the last one is in progress, and
 350      _cpp_maybe_push_include_file has yet to restore the line map.  */
 351   struct pending_option **next_include_file;
 352
 353   /* Multiple inlcude optimisation.  */
 354   const cpp_hashnode *mi_cmacro;
 355   const cpp_hashnode *mi_ind_cmacro;
 356   bool mi_valid;
 357
 358   /* Lexing.  */
 359   cpp_token *cur_token;
 360   tokenrun base_run, *cur_run;
 361   unsigned int lookaheads;
 362
 363   /* Non-zero prevents the lexer from re-using the token runs.  */
 364   unsigned int keep_tokens;
 365
 366   /* Error counter for exit code.  */
 367   unsigned int errors;
 368
 369   /* Buffer to hold macro definition string.  */
 370   unsigned char *macro_buffer;
 371   unsigned int macro_buffer_len;
 372
 373   /* Tree of other included files.  See cppfiles.c.  */
 374   struct splay_tree_s *all_include_files;
 375
 376   /* Current maximum length of directory names in the search path
 377      for include files.  (Altered as we get more of them.)  */
 378   unsigned int max_include_len;
 379
 380   /* Macros on or after this line are warned about if unused.  */
 381   unsigned int first_unused_line;
 382
 383   /* Date and time text.  Calculated together if either is requested.  */
 384   const uchar *date;
 385   const uchar *time;
 386
 387   /* EOF token, and a token forcing paste avoidance.  */
 388   cpp_token avoid_paste;
 389   cpp_token eof;
 390
 391   /* Opaque handle to the dependencies of mkdeps.c.  Used by -M etc.  */
 392   struct deps *deps;
 393
 394   /* Obstack holding all macro hash nodes.  This never shrinks.
 395      See cpphash.c */
 396   struct obstack hash_ob;
 397
 398   /* Obstack holding buffer and conditional structures.  This is a
 399      real stack.  See cpplib.c.  */
 400   struct obstack buffer_ob;
 401
 402   /* Pragma table - dynamic, because a library user can add to the
 403      list of recognized pragmas.  */
 404   struct pragma_entry *pragmas;
 405
 406   /* Call backs.  */
 407   struct cpp_callbacks cb;
 408
 409   /* Identifier hash table.  */
 410   struct ht *hash_table;
 411
 412   /* Expression parser stack.  */
 413   struct op *op_stack, *op_limit;
 414
 415   /* User visible options.  */
 416   struct cpp_options opts;
 417
 418   /* Special nodes - identifiers with predefined significance to the
 419      preprocessor.  */
 420   struct spec_nodes spec_nodes;
 421
 422   /* Whether cpplib owns the hashtable.  */
 423   unsigned char our_hashtable;
 424
 425   /* Traditional preprocessing output buffer (a logical line).  */
 426   struct
 427   {
 428     uchar *base;
 429     uchar *limit;
 430     uchar *cur;
 431     unsigned int first_line;
 432   } out;
 433
 434   /* Used to save the original line number during traditional
 435      preprocessing.  */
 436   unsigned int saved_line;
 437 };
 438
 439 /* Character classes.  Based on the more primitive macros in safe-ctype.h.
 440    If the definition of `numchar' looks odd to you, please look up the
 441    definition of a pp-number in the C standard [section 6.4.8 of C99].
 442
 443    In the unlikely event that characters other than \r and \n enter
 444    the set is_vspace, the macro handle_newline() in cpplex.c must be
 445    updated.  */
 446 #define _dollar_ok(x)   ((x) == '$' && CPP_OPTION (pfile, dollars_in_ident))
 447
 448 #define is_idchar(x)    (ISIDNUM(x) || _dollar_ok(x))
 449 #define is_numchar(x)   ISIDNUM(x)
 450 #define is_idstart(x)   (ISIDST(x) || _dollar_ok(x))
 451 #define is_numstart(x)  ISDIGIT(x)
 452 #define is_hspace(x)    ISBLANK(x)
 453 #define is_vspace(x)    IS_VSPACE(x)
 454 #define is_nvspace(x)   IS_NVSPACE(x)
 455 #define is_space(x)     IS_SPACE_OR_NUL(x)
 456
 457 /* This table is constant if it can be initialized at compile time,
 458    which is the case if cpp was compiled with GCC >=2.7, or another
 459    compiler that supports C99.  */
 460 #if HAVE_DESIGNATED_INITIALIZERS
 461 extern const unsigned char _cpp_trigraph_map[UCHAR_MAX + 1];
 462 #else
 463 extern unsigned char _cpp_trigraph_map[UCHAR_MAX + 1];
 464 #endif
 465
 466 /* Macros.  */
 467
 468 #define CPP_PRINT_DEPS(PFILE) CPP_OPTION (PFILE, print_deps)
 469 #define CPP_IN_SYSTEM_HEADER(PFILE) ((PFILE)->map && (PFILE)->map->sysp)
 470 #define CPP_PEDANTIC(PF) CPP_OPTION (PF, pedantic)
 471 #define CPP_WTRADITIONAL(PF) CPP_OPTION (PF, warn_traditional)
 472
 473 /* In cpperror.c  */
 474 extern int _cpp_begin_message PARAMS ((cpp_reader *, int,
 475                                        unsigned int, unsigned int));
 476
 477 /* In cppmacro.c */
 478 extern void _cpp_free_definition        PARAMS ((cpp_hashnode *));
 479 extern bool _cpp_create_definition      PARAMS ((cpp_reader *, cpp_hashnode *));
 480 extern void _cpp_pop_context            PARAMS ((cpp_reader *));
 481 extern void _cpp_push_text_context      PARAMS ((cpp_reader *, cpp_hashnode *,
 482                                                  const uchar *, size_t));
 483 extern bool _cpp_save_parameter         PARAMS ((cpp_reader *, cpp_macro *,
 484                                                  cpp_hashnode *));
 485 extern bool _cpp_arguments_ok           PARAMS ((cpp_reader *, cpp_macro *,
 486                                                  const cpp_hashnode *,
 487                                                  unsigned int));
 488 extern const uchar *_cpp_builtin_macro_text PARAMS ((cpp_reader *,
 489                                                      cpp_hashnode *));
 490 int _cpp_warn_if_unused_macro           PARAMS ((cpp_reader *, cpp_hashnode *,
 491                                                  void *));
 492 /* In cpphash.c */
 493 extern void _cpp_init_hashtable         PARAMS ((cpp_reader *, hash_table *));
 494 extern void _cpp_destroy_hashtable      PARAMS ((cpp_reader *));
 495
 496 /* In cppfiles.c */
 497 extern void _cpp_fake_include           PARAMS ((cpp_reader *, const char *));
 498 extern void _cpp_never_reread           PARAMS ((struct include_file *));
 499 extern char *_cpp_simplify_pathname     PARAMS ((char *));
 500 extern bool _cpp_read_file              PARAMS ((cpp_reader *, const char *));
 501 extern bool _cpp_execute_include        PARAMS ((cpp_reader *,
 502                                                  const cpp_token *,
 503                                                  enum include_type));
 504 extern int _cpp_compare_file_date       PARAMS ((cpp_reader *,
 505                                                  const cpp_token *));
 506 extern void _cpp_report_missing_guards  PARAMS ((cpp_reader *));
 507 extern void _cpp_init_includes          PARAMS ((cpp_reader *));
 508 extern void _cpp_cleanup_includes       PARAMS ((cpp_reader *));
 509 extern void _cpp_pop_file_buffer        PARAMS ((cpp_reader *,
 510                                                  struct include_file *));
 511
 512 /* In cppexp.c */
 513 extern bool _cpp_parse_expr             PARAMS ((cpp_reader *));
 514 extern struct op *_cpp_expand_op_stack  PARAMS ((cpp_reader *));
 515
 516 /* In cpplex.c */
 517 extern cpp_token *_cpp_temp_token       PARAMS ((cpp_reader *));
 518 extern const cpp_token *_cpp_lex_token  PARAMS ((cpp_reader *));
 519 extern cpp_token *_cpp_lex_direct       PARAMS ((cpp_reader *));
 520 extern int _cpp_equiv_tokens            PARAMS ((const cpp_token *,
 521                                                  const cpp_token *));
 522 extern void _cpp_init_tokenrun          PARAMS ((tokenrun *, unsigned int));
 523
 524 /* In cppinit.c.  */
 525 extern void _cpp_maybe_push_include_file PARAMS ((cpp_reader *));
 526
 527 /* In cpplib.c */
 528 extern int _cpp_test_assertion PARAMS ((cpp_reader *, unsigned int *));
 529 extern int _cpp_handle_directive PARAMS ((cpp_reader *, int));
 530 extern void _cpp_define_builtin PARAMS ((cpp_reader *, const char *));
 531 extern void _cpp_do__Pragma     PARAMS ((cpp_reader *));
 532 extern void _cpp_init_directives PARAMS ((cpp_reader *));
 533 extern void _cpp_init_internal_pragmas PARAMS ((cpp_reader *));
 534 extern void _cpp_do_file_change PARAMS ((cpp_reader *, enum lc_reason,
 535                                          const char *,
 536                                          unsigned int, unsigned int));
 537 extern void _cpp_pop_buffer PARAMS ((cpp_reader *));
 538
 539 /* In cpptrad.c.  */
 540 extern bool _cpp_read_logical_line_trad PARAMS ((cpp_reader *));
 541 extern void _cpp_overlay_buffer PARAMS ((cpp_reader *pfile, const uchar *,
 542                                          size_t));
 543 extern void _cpp_remove_overlay PARAMS ((cpp_reader *));
 544 extern bool _cpp_create_trad_definition PARAMS ((cpp_reader *, cpp_macro *));
 545 extern bool _cpp_expansions_different_trad PARAMS ((const cpp_macro *,
 546                                                     const cpp_macro *));
 547 extern uchar *_cpp_copy_replacement_text PARAMS ((const cpp_macro *, uchar *));
 548 extern size_t _cpp_replacement_text_len PARAMS ((const cpp_macro *));
 549
 550 /* Utility routines and macros.  */
 551 #define DSC(str) (const uchar *)str, sizeof str - 1
 552 #define xnew(T)         (T *) xmalloc (sizeof(T))
 553 #define xcnew(T)        (T *) xcalloc (1, sizeof(T))
 554 #define xnewvec(T, N)   (T *) xmalloc (sizeof(T) * (N))
 555 #define xcnewvec(T, N)  (T *) xcalloc (N, sizeof(T))
 556 #define xobnew(O, T)    (T *) obstack_alloc (O, sizeof(T))
 557
 558 /* These are inline functions instead of macros so we can get type
 559    checking.  */
 560 static inline int ustrcmp       PARAMS ((const uchar *, const uchar *));
 561 static inline int ustrncmp      PARAMS ((const uchar *, const uchar *,
 562                                          size_t));
 563 static inline size_t ustrlen    PARAMS ((const uchar *));
 564 static inline uchar *uxstrdup   PARAMS ((const uchar *));
 565 static inline uchar *ustrchr    PARAMS ((const uchar *, int));
 566 static inline int ufputs        PARAMS ((const uchar *, FILE *));
 567
 568 static inline int
 569 ustrcmp (s1, s2)
 570      const uchar *s1, *s2;
 571 {
 572   return strcmp ((const char *)s1, (const char *)s2);
 573 }
 574
 575 static inline int
 576 ustrncmp (s1, s2, n)
 577      const uchar *s1, *s2;
 578      size_t n;
 579 {
 580   return strncmp ((const char *)s1, (const char *)s2, n);
 581 }
 582
 583 static inline size_t
 584 ustrlen (s1)
 585      const uchar *s1;
 586 {
 587   return strlen ((const char *)s1);
 588 }
 589
 590 static inline uchar *
 591 uxstrdup (s1)
 592      const uchar *s1;
 593 {
 594   return (uchar *) xstrdup ((const char *)s1);
 595 }
 596
 597 static inline uchar *
 598 ustrchr (s1, c)
 599      const uchar *s1;
 600      int c;
 601 {
 602   return (uchar *) strchr ((const char *)s1, c);
 603 }
 604
 605 static inline int
 606 ufputs (s, f)
 607      const uchar *s;
 608      FILE *f;
 609 {
 610   return fputs ((const char *)s, f);
 611 }
 612
 613 #endif /* ! GCC_CPPHASH_H */