libcpp/internal.h

   1 /* Part of CPP library.
   2    Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004
   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 should not be used outside
  21    cpplib.  */
  22
  23 #ifndef LIBCPP_INTERNAL_H
  24 #define LIBCPP_INTERNAL_H
  25
  26 #include "symtab.h"
  27 #include "cpp-id-data.h"
  28
  29 #if defined HAVE_ICONV_H && defined HAVE_ICONV
  30 #include <iconv.h>
  31 #else
  32 #define HAVE_ICONV 0
  33 typedef int iconv_t;  /* dummy */
  34 #endif
  35
  36 struct directive;               /* Deliberately incomplete.  */
  37 struct pending_option;
  38 struct op;
  39 struct _cpp_strbuf;
  40
  41 typedef bool (*convert_f) (iconv_t, const unsigned char *, size_t,
  42                            struct _cpp_strbuf *);
  43 struct cset_converter
  44 {
  45   convert_f func;
  46   iconv_t cd;
  47 };
  48
  49 #define BITS_PER_CPPCHAR_T (CHAR_BIT * sizeof (cppchar_t))
  50
  51 /* Test if a sign is valid within a preprocessing number.  */
  52 #define VALID_SIGN(c, prevc) \
  53   (((c) == '+' || (c) == '-') && \
  54    ((prevc) == 'e' || (prevc) == 'E' \
  55     || (((prevc) == 'p' || (prevc) == 'P') \
  56         && CPP_OPTION (pfile, extended_numbers))))
  57
  58 #define CPP_OPTION(PFILE, OPTION) ((PFILE)->opts.OPTION)
  59 #define CPP_BUFFER(PFILE) ((PFILE)->buffer)
  60 #define CPP_BUF_COLUMN(BUF, CUR) ((CUR) - (BUF)->line_base)
  61 #define CPP_BUF_COL(BUF) CPP_BUF_COLUMN(BUF, (BUF)->cur)
  62
  63 #define CPP_INCREMENT_LINE(PFILE, COLS_HINT) do { \
  64     const struct line_maps *line_table = PFILE->line_table; \
  65     const struct line_map *map = &line_table->maps[line_table->used-1]; \
  66     unsigned int line = SOURCE_LINE (map, line_table->highest_line); \
  67     linemap_line_start (PFILE->line_table, line + 1, COLS_HINT); \
  68   } while (0)
  69
  70 /* Maximum nesting of cpp_buffers.  We use a static limit, partly for
  71    efficiency, and partly to limit runaway recursion.  */
  72 #define CPP_STACK_MAX 200
  73
  74 /* Host alignment handling.  */
  75 struct dummy
  76 {
  77   char c;
  78   union
  79   {
  80     double d;
  81     int *p;
  82   } u;
  83 };
  84
  85 #define DEFAULT_ALIGNMENT offsetof (struct dummy, u)
  86 #define CPP_ALIGN2(size, align) (((size) + ((align) - 1)) & ~((align) - 1))
  87 #define CPP_ALIGN(size) CPP_ALIGN2 (size, DEFAULT_ALIGNMENT)
  88
  89 #define _cpp_mark_macro_used(NODE) do {                                 \
  90   if ((NODE)->type == NT_MACRO && !((NODE)->flags & NODE_BUILTIN))      \
  91     (NODE)->value.macro->used = 1; } while (0)
  92
  93 /* A generic memory buffer, and operations on it.  */
  94 typedef struct _cpp_buff _cpp_buff;
  95 struct _cpp_buff
  96 {
  97   struct _cpp_buff *next;
  98   unsigned char *base, *cur, *limit;
  99 };
 100
 101 extern _cpp_buff *_cpp_get_buff (cpp_reader *, size_t);
 102 extern void _cpp_release_buff (cpp_reader *, _cpp_buff *);
 103 extern void _cpp_extend_buff (cpp_reader *, _cpp_buff **, size_t);
 104 extern _cpp_buff *_cpp_append_extend_buff (cpp_reader *, _cpp_buff *, size_t);
 105 extern void _cpp_free_buff (_cpp_buff *);
 106 extern unsigned char *_cpp_aligned_alloc (cpp_reader *, size_t);
 107 extern unsigned char *_cpp_unaligned_alloc (cpp_reader *, size_t);
 108
 109 #define BUFF_ROOM(BUFF) (size_t) ((BUFF)->limit - (BUFF)->cur)
 110 #define BUFF_FRONT(BUFF) ((BUFF)->cur)
 111 #define BUFF_LIMIT(BUFF) ((BUFF)->limit)
 112
 113 /* #include types.  */
 114 enum include_type {IT_INCLUDE, IT_INCLUDE_NEXT, IT_IMPORT, IT_CMDLINE};
 115
 116 union utoken
 117 {
 118   const cpp_token *token;
 119   const cpp_token **ptoken;
 120 };
 121
 122 /* A "run" of tokens; part of a chain of runs.  */
 123 typedef struct tokenrun tokenrun;
 124 struct tokenrun
 125 {
 126   tokenrun *next, *prev;
 127   cpp_token *base, *limit;
 128 };
 129
 130 /* Accessor macros for struct cpp_context.  */
 131 #define FIRST(c) ((c)->u.iso.first)
 132 #define LAST(c) ((c)->u.iso.last)
 133 #define CUR(c) ((c)->u.trad.cur)
 134 #define RLIMIT(c) ((c)->u.trad.rlimit)
 135
 136 typedef struct cpp_context cpp_context;
 137 struct cpp_context
 138 {
 139   /* Doubly-linked list.  */
 140   cpp_context *next, *prev;
 141
 142   union
 143   {
 144     /* For ISO macro expansion.  Contexts other than the base context
 145        are contiguous tokens.  e.g. macro expansions, expanded
 146        argument tokens.  */
 147     struct
 148     {
 149       union utoken first;
 150       union utoken last;
 151     } iso;
 152
 153     /* For traditional macro expansion.  */
 154     struct
 155     {
 156       const uchar *cur;
 157       const uchar *rlimit;
 158     } trad;
 159   } u;
 160
 161   /* If non-NULL, a buffer used for storage related to this context.
 162      When the context is popped, the buffer is released.  */
 163   _cpp_buff *buff;
 164
 165   /* For a macro context, the macro node, otherwise NULL.  */
 166   cpp_hashnode *macro;
 167
 168   /* True if utoken element is token, else ptoken.  */
 169   bool direct_p;
 170 };
 171
 172 struct lexer_state
 173 {
 174   /* Nonzero if first token on line is CPP_HASH.  */
 175   unsigned char in_directive;
 176
 177   /* Nonzero if in a directive that will handle padding tokens itself.
 178      #include needs this to avoid problems with computed include and
 179      spacing between tokens.  */
 180   unsigned char directive_wants_padding;
 181
 182   /* True if we are skipping a failed conditional group.  */
 183   unsigned char skipping;
 184
 185   /* Nonzero if in a directive that takes angle-bracketed headers.  */
 186   unsigned char angled_headers;
 187
 188   /* Nonzero if in a #if or #elif directive.  */
 189   unsigned char in_expression;
 190
 191   /* Nonzero to save comments.  Turned off if discard_comments, and in
 192      all directives apart from #define.  */
 193   unsigned char save_comments;
 194
 195   /* Nonzero if lexing __VA_ARGS__ is valid.  */
 196   unsigned char va_args_ok;
 197
 198   /* Nonzero if lexing poisoned identifiers is valid.  */
 199   unsigned char poisoned_ok;
 200
 201   /* Nonzero to prevent macro expansion.  */
 202   unsigned char prevent_expansion;
 203
 204   /* Nonzero when parsing arguments to a function-like macro.  */
 205   unsigned char parsing_args;
 206
 207   /* Nonzero if prevent_expansion is true only because output is
 208      being discarded.  */
 209   unsigned char discarding_output;
 210
 211   /* Nonzero to skip evaluating part of an expression.  */
 212   unsigned int skip_eval;
 213 };
 214
 215 /* Special nodes - identifiers with predefined significance.  */
 216 struct spec_nodes
 217 {
 218   cpp_hashnode *n_defined;              /* defined operator */
 219   cpp_hashnode *n_true;                 /* C++ keyword true */
 220   cpp_hashnode *n_false;                /* C++ keyword false */
 221   cpp_hashnode *n__VA_ARGS__;           /* C99 vararg macros */
 222 };
 223
 224 typedef struct _cpp_line_note _cpp_line_note;
 225 struct _cpp_line_note
 226 {
 227   /* Location in the clean line the note refers to.  */
 228   const uchar *pos;
 229
 230   /* Type of note.  The 9 'from' trigraph characters represent those
 231      trigraphs, '\\' an escaped newline, ' ' an escaped newline with
 232      intervening space, and anything else is invalid.  */
 233   unsigned int type;
 234 };
 235
 236 /* Represents the contents of a file cpplib has read in.  */
 237 struct cpp_buffer
 238 {
 239   const uchar *cur;             /* Current location.  */
 240   const uchar *line_base;       /* Start of current physical line.  */
 241   const uchar *next_line;       /* Start of to-be-cleaned logical line.  */
 242
 243   const uchar *buf;             /* Entire character buffer.  */
 244   const uchar *rlimit;          /* Writable byte at end of file.  */
 245
 246   _cpp_line_note *notes;        /* Array of notes.  */
 247   unsigned int cur_note;        /* Next note to process.  */
 248   unsigned int notes_used;      /* Number of notes.  */
 249   unsigned int notes_cap;       /* Size of allocated array.  */
 250
 251   struct cpp_buffer *prev;
 252
 253   /* Pointer into the file table; non-NULL if this is a file buffer.
 254      Used for include_next and to record control macros.  */
 255   struct _cpp_file *file;
 256
 257   /* Value of if_stack at start of this file.
 258      Used to prohibit unmatched #endif (etc) in an include file.  */
 259   struct if_stack *if_stack;
 260
 261   /* True if we need to get the next clean line.  */
 262   bool need_line;
 263
 264   /* True if we have already warned about C++ comments in this file.
 265      The warning happens only for C89 extended mode with -pedantic on,
 266      or for -Wtraditional, and only once per file (otherwise it would
 267      be far too noisy).  */
 268   unsigned int warned_cplusplus_comments : 1;
 269
 270   /* True if we don't process trigraphs and escaped newlines.  True
 271      for preprocessed input, command line directives, and _Pragma
 272      buffers.  */
 273   unsigned int from_stage3 : 1;
 274
 275   /* At EOF, a buffer is automatically popped.  If RETURN_AT_EOF is
 276      true, a CPP_EOF token is then returned.  Otherwise, the next
 277      token from the enclosing buffer is returned.  */
 278   unsigned int return_at_eof : 1;
 279
 280   /* One for a system header, two for a C system header file that therefore
 281      needs to be extern "C" protected in C++, and zero otherwise.  */
 282   unsigned char sysp;
 283
 284   /* The directory of the this buffer's file.  Its NAME member is not
 285      allocated, so we don't need to worry about freeing it.  */
 286   struct cpp_dir dir;
 287
 288   /* Descriptor for converting from the input character set to the
 289      source character set.  */
 290   struct cset_converter input_cset_desc;
 291 };
 292
 293 /* A cpp_reader encapsulates the "state" of a pre-processor run.
 294    Applying cpp_get_token repeatedly yields a stream of pre-processor
 295    tokens.  Usually, there is only one cpp_reader object active.  */
 296 struct cpp_reader
 297 {
 298   /* Top of buffer stack.  */
 299   cpp_buffer *buffer;
 300
 301   /* Overlaid buffer (can be different after processing #include).  */
 302   cpp_buffer *overlaid_buffer;
 303
 304   /* Lexer state.  */
 305   struct lexer_state state;
 306
 307   /* Source line tracking.  */
 308   struct line_maps *line_table;
 309
 310   /* The line of the '#' of the current directive.  */
 311   source_location directive_line;
 312
 313   /* Memory buffers.  */
 314   _cpp_buff *a_buff;            /* Aligned permanent storage.  */
 315   _cpp_buff *u_buff;            /* Unaligned permanent storage.  */
 316   _cpp_buff *free_buffs;        /* Free buffer chain.  */
 317
 318   /* Context stack.  */
 319   struct cpp_context base_context;
 320   struct cpp_context *context;
 321
 322   /* If in_directive, the directive if known.  */
 323   const struct directive *directive;
 324
 325   /* Search paths for include files.  */
 326   struct cpp_dir *quote_include;        /* "" */
 327   struct cpp_dir *bracket_include;      /* <> */
 328   struct cpp_dir no_search_path;        /* No path.  */
 329
 330   /* Chain of all hashed _cpp_file instances.  */
 331   struct _cpp_file *all_files;
 332
 333   struct _cpp_file *main_file;
 334
 335   /* File and directory hash table.  */
 336   struct htab *file_hash;
 337   struct htab *dir_hash;
 338   struct file_hash_entry *file_hash_entries;
 339   unsigned int file_hash_entries_allocated, file_hash_entries_used;
 340
 341   /* Nonzero means don't look for #include "foo" the source-file
 342      directory.  */
 343   bool quote_ignores_source_dir;
 344
 345   /* Nonzero if any file has contained #pragma once or #import has
 346      been used.  */
 347   bool seen_once_only;
 348
 349   /* Multiple include optimization.  */
 350   const cpp_hashnode *mi_cmacro;
 351   const cpp_hashnode *mi_ind_cmacro;
 352   bool mi_valid;
 353
 354   /* Lexing.  */
 355   cpp_token *cur_token;
 356   tokenrun base_run, *cur_run;
 357   unsigned int lookaheads;
 358
 359   /* Nonzero prevents the lexer from re-using the token runs.  */
 360   unsigned int keep_tokens;
 361
 362   /* Error counter for exit code.  */
 363   unsigned int errors;
 364
 365   /* Buffer to hold macro definition string.  */
 366   unsigned char *macro_buffer;
 367   unsigned int macro_buffer_len;
 368
 369   /* Descriptor for converting from the source character set to the
 370      execution character set.  */
 371   struct cset_converter narrow_cset_desc;
 372
 373   /* Descriptor for converting from the source character set to the
 374      wide execution character set.  */
 375   struct cset_converter wide_cset_desc;
 376
 377   /* Date and time text.  Calculated together if either is requested.  */
 378   const uchar *date;
 379   const uchar *time;
 380
 381   /* EOF token, and a token forcing paste avoidance.  */
 382   cpp_token avoid_paste;
 383   cpp_token eof;
 384
 385   /* Opaque handle to the dependencies of mkdeps.c.  */
 386   struct deps *deps;
 387
 388   /* Obstack holding all macro hash nodes.  This never shrinks.
 389      See cpphash.c */
 390   struct obstack hash_ob;
 391
 392   /* Obstack holding buffer and conditional structures.  This is a
 393      real stack.  See cpplib.c.  */
 394   struct obstack buffer_ob;
 395
 396   /* Pragma table - dynamic, because a library user can add to the
 397      list of recognized pragmas.  */
 398   struct pragma_entry *pragmas;
 399
 400   /* Call backs to cpplib client.  */
 401   struct cpp_callbacks cb;
 402
 403   /* Identifier hash table.  */
 404   struct ht *hash_table;
 405
 406   /* Expression parser stack.  */
 407   struct op *op_stack, *op_limit;
 408
 409   /* User visible options.  */
 410   struct cpp_options opts;
 411
 412   /* Special nodes - identifiers with predefined significance to the
 413      preprocessor.  */
 414   struct spec_nodes spec_nodes;
 415
 416   /* Whether cpplib owns the hashtable.  */
 417   bool our_hashtable;
 418
 419   /* Traditional preprocessing output buffer (a logical line).  */
 420   struct
 421   {
 422     uchar *base;
 423     uchar *limit;
 424     uchar *cur;
 425     source_location first_line;
 426   } out;
 427
 428   /* Used for buffer overlays by cpptrad.c.  */
 429   const uchar *saved_cur, *saved_rlimit, *saved_line_base;
 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 static inline int cpp_in_system_header (cpp_reader *);
 466 static inline int
 467 cpp_in_system_header (cpp_reader *pfile)
 468 {
 469   return pfile->buffer ? pfile->buffer->sysp : 0;
 470 }
 471 #define CPP_PEDANTIC(PF) CPP_OPTION (PF, pedantic)
 472 #define CPP_WTRADITIONAL(PF) CPP_OPTION (PF, warn_traditional)
 473
 474 /* In cpperror.c  */
 475 extern int _cpp_begin_message (cpp_reader *, int,
 476                                source_location, unsigned int);
 477
 478 /* In cppmacro.c */
 479 extern void _cpp_free_definition (cpp_hashnode *);
 480 extern bool _cpp_create_definition (cpp_reader *, cpp_hashnode *);
 481 extern void _cpp_pop_context (cpp_reader *);
 482 extern void _cpp_push_text_context (cpp_reader *, cpp_hashnode *,
 483                                     const uchar *, size_t);
 484 extern bool _cpp_save_parameter (cpp_reader *, cpp_macro *, cpp_hashnode *);
 485 extern bool _cpp_arguments_ok (cpp_reader *, cpp_macro *, const cpp_hashnode *,
 486                                unsigned int);
 487 extern const uchar *_cpp_builtin_macro_text (cpp_reader *, cpp_hashnode *);
 488 int _cpp_warn_if_unused_macro (cpp_reader *, cpp_hashnode *, void *);
 489 /* In cpphash.c */
 490 extern void _cpp_init_hashtable (cpp_reader *, hash_table *);
 491 extern void _cpp_destroy_hashtable (cpp_reader *);
 492
 493 /* In cppfiles.c */
 494 typedef struct _cpp_file _cpp_file;
 495 extern _cpp_file *_cpp_find_file (cpp_reader *, const char *fname,
 496                                   cpp_dir *start_dir, bool fake);
 497 extern bool _cpp_find_failed (_cpp_file *);
 498 extern void _cpp_mark_file_once_only (cpp_reader *, struct _cpp_file *);
 499 extern void _cpp_fake_include (cpp_reader *, const char *);
 500 extern bool _cpp_stack_file (cpp_reader *, _cpp_file*, bool);
 501 extern bool _cpp_stack_include (cpp_reader *, const char *, int,
 502                                 enum include_type);
 503 extern int _cpp_compare_file_date (cpp_reader *, const char *, int);
 504 extern void _cpp_report_missing_guards (cpp_reader *);
 505 extern void _cpp_init_files (cpp_reader *);
 506 extern void _cpp_cleanup_files (cpp_reader *);
 507 extern void _cpp_pop_file_buffer (cpp_reader *, struct _cpp_file *);
 508 extern bool _cpp_save_file_entries (cpp_reader *pfile, FILE *f);
 509 extern bool _cpp_read_file_entries (cpp_reader *, FILE *);
 510
 511 /* In cppexp.c */
 512 extern bool _cpp_parse_expr (cpp_reader *);
 513 extern struct op *_cpp_expand_op_stack (cpp_reader *);
 514
 515 /* In cpplex.c */
 516 extern void _cpp_process_line_notes (cpp_reader *, int);
 517 extern void _cpp_clean_line (cpp_reader *);
 518 extern bool _cpp_get_fresh_line (cpp_reader *);
 519 extern bool _cpp_skip_block_comment (cpp_reader *);
 520 extern cpp_token *_cpp_temp_token (cpp_reader *);
 521 extern const cpp_token *_cpp_lex_token (cpp_reader *);
 522 extern cpp_token *_cpp_lex_direct (cpp_reader *);
 523 extern int _cpp_equiv_tokens (const cpp_token *, const cpp_token *);
 524 extern void _cpp_init_tokenrun (tokenrun *, unsigned int);
 525
 526 /* In cppinit.c.  */
 527 extern void _cpp_maybe_push_include_file (cpp_reader *);
 528
 529 /* In cpplib.c */
 530 extern int _cpp_test_assertion (cpp_reader *, unsigned int *);
 531 extern int _cpp_handle_directive (cpp_reader *, int);
 532 extern void _cpp_define_builtin (cpp_reader *, const char *);
 533 extern char ** _cpp_save_pragma_names (cpp_reader *);
 534 extern void _cpp_restore_pragma_names (cpp_reader *, char **);
 535 extern void _cpp_do__Pragma (cpp_reader *);
 536 extern void _cpp_init_directives (cpp_reader *);
 537 extern void _cpp_init_internal_pragmas (cpp_reader *);
 538 extern void _cpp_do_file_change (cpp_reader *, enum lc_reason, const char *,
 539                                  unsigned int, unsigned int);
 540 extern void _cpp_pop_buffer (cpp_reader *);
 541
 542 /* In cpptrad.c.  */
 543 extern bool _cpp_scan_out_logical_line (cpp_reader *, cpp_macro *);
 544 extern bool _cpp_read_logical_line_trad (cpp_reader *);
 545 extern void _cpp_overlay_buffer (cpp_reader *pfile, const uchar *, size_t);
 546 extern void _cpp_remove_overlay (cpp_reader *);
 547 extern bool _cpp_create_trad_definition (cpp_reader *, cpp_macro *);
 548 extern bool _cpp_expansions_different_trad (const cpp_macro *,
 549                                             const cpp_macro *);
 550 extern uchar *_cpp_copy_replacement_text (const cpp_macro *, uchar *);
 551 extern size_t _cpp_replacement_text_len (const cpp_macro *);
 552
 553 /* In cppcharset.c.  */
 554 extern cppchar_t _cpp_valid_ucn (cpp_reader *, const uchar **,
 555                                  const uchar *, int);
 556 extern void _cpp_destroy_iconv (cpp_reader *);
 557 extern uchar *_cpp_convert_input (cpp_reader *, const char *, uchar *,
 558                                   size_t, size_t, off_t *);
 559 extern const char *_cpp_default_encoding (void);
 560
 561 /* Utility routines and macros.  */
 562 #define DSC(str) (const uchar *)str, sizeof str - 1
 563
 564 /* These are inline functions instead of macros so we can get type
 565    checking.  */
 566 static inline int ustrcmp (const uchar *, const uchar *);
 567 static inline int ustrncmp (const uchar *, const uchar *, size_t);
 568 static inline size_t ustrlen (const uchar *);
 569 static inline uchar *uxstrdup (const uchar *);
 570 static inline uchar *ustrchr (const uchar *, int);
 571 static inline int ufputs (const uchar *, FILE *);
 572
 573 static inline int
 574 ustrcmp (const uchar *s1, const uchar *s2)
 575 {
 576   return strcmp ((const char *)s1, (const char *)s2);
 577 }
 578
 579 static inline int
 580 ustrncmp (const uchar *s1, const uchar *s2, size_t n)
 581 {
 582   return strncmp ((const char *)s1, (const char *)s2, n);
 583 }
 584
 585 static inline size_t
 586 ustrlen (const uchar *s1)
 587 {
 588   return strlen ((const char *)s1);
 589 }
 590
 591 static inline uchar *
 592 uxstrdup (const uchar *s1)
 593 {
 594   return (uchar *) xstrdup ((const char *)s1);
 595 }
 596
 597 static inline uchar *
 598 ustrchr (const uchar *s1, int c)
 599 {
 600   return (uchar *) strchr ((const char *)s1, c);
 601 }
 602
 603 static inline int
 604 ufputs (const uchar *s, FILE *f)
 605 {
 606   return fputs ((const char *)s, f);
 607 }
 608
 609 #endif /* ! LIBCPP_INTERNAL_H */