libio/libio.h

   1 /* Copyright (C) 1991-1995, 1997-2003, 2004 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Written by Per Bothner <bothner@cygnus.com>.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library 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 GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.
  19
  20    As a special exception, if you link the code in this file with
  21    files compiled with a GNU compiler to produce an executable,
  22    that does not cause the resulting executable to be covered by
  23    the GNU Lesser General Public License.  This exception does not
  24    however invalidate any other reasons why the executable file
  25    might be covered by the GNU Lesser General Public License.
  26    This exception applies to code released by its copyright holders
  27    in files containing the exception.  */
  28
  29 #ifndef _IO_STDIO_H
  30 #define _IO_STDIO_H
  31
  32 #include <_G_config.h>
  33 /* ALL of these should be defined in _G_config.h */
  34 #define _IO_pos_t _G_fpos_t /* obsolete */
  35 #define _IO_fpos_t _G_fpos_t
  36 #define _IO_fpos64_t _G_fpos64_t
  37 #define _IO_size_t _G_size_t
  38 #define _IO_ssize_t _G_ssize_t
  39 #define _IO_off_t _G_off_t
  40 #define _IO_off64_t _G_off64_t
  41 #define _IO_pid_t _G_pid_t
  42 #define _IO_uid_t _G_uid_t
  43 #define _IO_iconv_t _G_iconv_t
  44 #define _IO_HAVE_SYS_WAIT _G_HAVE_SYS_WAIT
  45 #define _IO_HAVE_ST_BLKSIZE _G_HAVE_ST_BLKSIZE
  46 #define _IO_BUFSIZ _G_BUFSIZ
  47 #define _IO_va_list _G_va_list
  48 #define _IO_wint_t _G_wint_t
  49
  50 #ifdef _G_NEED_STDARG_H
  51 /* This define avoids name pollution if we're using GNU stdarg.h */
  52 # define __need___va_list
  53 # include <stdarg.h>
  54 # ifdef __GNUC_VA_LIST
  55 #  undef _IO_va_list
  56 #  define _IO_va_list __gnuc_va_list
  57 # endif /* __GNUC_VA_LIST */
  58 #endif
  59
  60 #ifndef __P
  61 # if _G_HAVE_SYS_CDEFS
  62 #  include <sys/cdefs.h>
  63 # else
  64 #  ifdef __STDC__
  65 #   define __P(p) p
  66 #   define __PMT(p) p
  67 #  else
  68 #   define __P(p) ()
  69 #   define __PMT(p) ()
  70 #  endif
  71 # endif
  72 #endif /*!__P*/
  73
  74 /* For backward compatibility */
  75 #ifndef _PARAMS
  76 # define _PARAMS(protos) __P(protos)
  77 #endif /*!_PARAMS*/
  78
  79 #ifndef __STDC__
  80 # ifndef const
  81 #  define const
  82 # endif
  83 #endif
  84 #define _IO_UNIFIED_JUMPTABLES 1
  85 #ifndef _G_HAVE_PRINTF_FP
  86 # define _IO_USE_DTOA 1
  87 #endif
  88
  89 #ifndef EOF
  90 # define EOF (-1)
  91 #endif
  92 #ifndef NULL
  93 # if defined __GNUG__ && \
  94     (__GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 8))
  95 #  define NULL (__null)
  96 # else
  97 #  if !defined(__cplusplus)
  98 #   define NULL ((void*)0)
  99 #  else
 100 #   define NULL (0)
 101 #  endif
 102 # endif
 103 #endif
 104
 105 #define _IOS_INPUT      1
 106 #define _IOS_OUTPUT     2
 107 #define _IOS_ATEND      4
 108 #define _IOS_APPEND     8
 109 #define _IOS_TRUNC      16
 110 #define _IOS_NOCREATE   32
 111 #define _IOS_NOREPLACE  64
 112 #define _IOS_BIN        128
 113
 114 /* Magic numbers and bits for the _flags field.
 115    The magic numbers use the high-order bits of _flags;
 116    the remaining bits are available for variable flags.
 117    Note: The magic numbers must all be negative if stdio
 118    emulation is desired. */
 119
 120 #define _IO_MAGIC 0xFBAD0000 /* Magic number */
 121 #define _OLD_STDIO_MAGIC 0xFABC0000 /* Emulate old stdio. */
 122 #define _IO_MAGIC_MASK 0xFFFF0000
 123 #define _IO_USER_BUF 1 /* User owns buffer; don't delete it on close. */
 124 #define _IO_UNBUFFERED 2
 125 #define _IO_NO_READS 4 /* Reading not allowed */
 126 #define _IO_NO_WRITES 8 /* Writing not allowd */
 127 #define _IO_EOF_SEEN 0x10
 128 #define _IO_ERR_SEEN 0x20
 129 #define _IO_DELETE_DONT_CLOSE 0x40 /* Don't call close(_fileno) on cleanup. */
 130 #define _IO_LINKED 0x80 /* Set if linked (using _chain) to streambuf::_list_all.*/
 131 #define _IO_IN_BACKUP 0x100
 132 #define _IO_LINE_BUF 0x200
 133 #define _IO_TIED_PUT_GET 0x400 /* Set if put and get pointer logicly tied. */
 134 #define _IO_CURRENTLY_PUTTING 0x800
 135 #define _IO_IS_APPENDING 0x1000
 136 #define _IO_IS_FILEBUF 0x2000
 137 #define _IO_BAD_SEEN 0x4000
 138 #define _IO_USER_LOCK 0x8000
 139
 140 #define _IO_FLAGS2_MMAP 1
 141 #define _IO_FLAGS2_NOTCANCEL 2
 142
 143 /* These are "formatting flags" matching the iostream fmtflags enum values. */
 144 #define _IO_SKIPWS 01
 145 #define _IO_LEFT 02
 146 #define _IO_RIGHT 04
 147 #define _IO_INTERNAL 010
 148 #define _IO_DEC 020
 149 #define _IO_OCT 040
 150 #define _IO_HEX 0100
 151 #define _IO_SHOWBASE 0200
 152 #define _IO_SHOWPOINT 0400
 153 #define _IO_UPPERCASE 01000
 154 #define _IO_SHOWPOS 02000
 155 #define _IO_SCIENTIFIC 04000
 156 #define _IO_FIXED 010000
 157 #define _IO_UNITBUF 020000
 158 #define _IO_STDIO 040000
 159 #define _IO_DONT_CLOSE 0100000
 160 #define _IO_BOOLALPHA 0200000
 161
 162
 163 struct _IO_jump_t;  struct _IO_FILE;
 164
 165 /* Handle lock.  */
 166 #ifdef _IO_MTSAFE_IO
 167 # if defined __GLIBC__ && __GLIBC__ >= 2
 168 #  include <bits/stdio-lock.h>
 169 # else
 170 /*# include <comthread.h>*/
 171 # endif
 172 #else
 173 typedef void _IO_lock_t;
 174 #endif
 175
 176
 177 /* A streammarker remembers a position in a buffer. */
 178
 179 struct _IO_marker {
 180   struct _IO_marker *_next;
 181   struct _IO_FILE *_sbuf;
 182   /* If _pos >= 0
 183  it points to _buf->Gbase()+_pos. FIXME comment */
 184   /* if _pos < 0, it points to _buf->eBptr()+_pos. FIXME comment */
 185   int _pos;
 186 #if 0
 187     void set_streampos(streampos sp) { _spos = sp; }
 188     void set_offset(int offset) { _pos = offset; _spos = (streampos)(-2); }
 189   public:
 190     streammarker(streambuf *sb);
 191     ~streammarker();
 192     int saving() { return  _spos == -2; }
 193     int delta(streammarker&);
 194     int delta();
 195 #endif
 196 };
 197
 198 /* This is the structure from the libstdc++ codecvt class.  */
 199 enum __codecvt_result
 200 {
 201   __codecvt_ok,
 202   __codecvt_partial,
 203   __codecvt_error,
 204   __codecvt_noconv
 205 };
 206
 207 #if defined _LIBC || defined _GLIBCPP_USE_WCHAR_T
 208 /* The order of the elements in the following struct must match the order
 209    of the virtual functions in the libstdc++ codecvt class.  */
 210 struct _IO_codecvt
 211 {
 212   void (*__codecvt_destr) (struct _IO_codecvt *);
 213   enum __codecvt_result (*__codecvt_do_out) (struct _IO_codecvt *,
 214                                              __mbstate_t *,
 215                                              const wchar_t *,
 216                                              const wchar_t *,
 217                                              const wchar_t **, char *,
 218                                              char *, char **);
 219   enum __codecvt_result (*__codecvt_do_unshift) (struct _IO_codecvt *,
 220                                                  __mbstate_t *, char *,
 221                                                  char *, char **);
 222   enum __codecvt_result (*__codecvt_do_in) (struct _IO_codecvt *,
 223                                             __mbstate_t *,
 224                                             const char *, const char *,
 225                                             const char **, wchar_t *,
 226                                             wchar_t *, wchar_t **);
 227   int (*__codecvt_do_encoding) (struct _IO_codecvt *);
 228   int (*__codecvt_do_always_noconv) (struct _IO_codecvt *);
 229   int (*__codecvt_do_length) (struct _IO_codecvt *, __mbstate_t *,
 230                               const char *, const char *, _IO_size_t);
 231   int (*__codecvt_do_max_length) (struct _IO_codecvt *);
 232
 233   _IO_iconv_t __cd_in;
 234   _IO_iconv_t __cd_out;
 235 };
 236
 237 /* Extra data for wide character streams.  */
 238 struct _IO_wide_data
 239 {
 240   wchar_t *_IO_read_ptr;        /* Current read pointer */
 241   wchar_t *_IO_read_end;        /* End of get area. */
 242   wchar_t *_IO_read_base;       /* Start of putback+get area. */
 243   wchar_t *_IO_write_base;      /* Start of put area. */
 244   wchar_t *_IO_write_ptr;       /* Current put pointer. */
 245   wchar_t *_IO_write_end;       /* End of put area. */
 246   wchar_t *_IO_buf_base;        /* Start of reserve area. */
 247   wchar_t *_IO_buf_end;         /* End of reserve area. */
 248   /* The following fields are used to support backing up and undo. */
 249   wchar_t *_IO_save_base;       /* Pointer to start of non-current get area. */
 250   wchar_t *_IO_backup_base;     /* Pointer to first valid character of
 251                                    backup area */
 252   wchar_t *_IO_save_end;        /* Pointer to end of non-current get area. */
 253
 254   __mbstate_t _IO_state;
 255   __mbstate_t _IO_last_state;
 256   struct _IO_codecvt _codecvt;
 257
 258   wchar_t _shortbuf[1];
 259
 260   const struct _IO_jump_t *_wide_vtable;
 261 };
 262 #endif
 263
 264 struct _IO_FILE {
 265   int _flags;           /* High-order word is _IO_MAGIC; rest is flags. */
 266 #define _IO_file_flags _flags
 267
 268   /* The following pointers correspond to the C++ streambuf protocol. */
 269   /* Note:  Tk uses the _IO_read_ptr and _IO_read_end fields directly. */
 270   char* _IO_read_ptr;   /* Current read pointer */
 271   char* _IO_read_end;   /* End of get area. */
 272   char* _IO_read_base;  /* Start of putback+get area. */
 273   char* _IO_write_base; /* Start of put area. */
 274   char* _IO_write_ptr;  /* Current put pointer. */
 275   char* _IO_write_end;  /* End of put area. */
 276   char* _IO_buf_base;   /* Start of reserve area. */
 277   char* _IO_buf_end;    /* End of reserve area. */
 278   /* The following fields are used to support backing up and undo. */
 279   char *_IO_save_base; /* Pointer to start of non-current get area. */
 280   char *_IO_backup_base;  /* Pointer to first valid character of backup area */
 281   char *_IO_save_end; /* Pointer to end of non-current get area. */
 282
 283   struct _IO_marker *_markers;
 284
 285   struct _IO_FILE *_chain;
 286
 287   int _fileno;
 288 #if 0
 289   int _blksize;
 290 #else
 291   int _flags2;
 292 #endif
 293   _IO_off_t _old_offset; /* This used to be _offset but it's too small.  */
 294
 295 #define __HAVE_COLUMN /* temporary */
 296   /* 1+column number of pbase(); 0 is unknown. */
 297   unsigned short _cur_column;
 298   signed char _vtable_offset;
 299   char _shortbuf[1];
 300
 301   /*  char* _save_gptr;  char* _save_egptr; */
 302
 303   _IO_lock_t *_lock;
 304 #ifdef _IO_USE_OLD_IO_FILE
 305 };
 306
 307 struct _IO_FILE_complete
 308 {
 309   struct _IO_FILE _file;
 310 #endif
 311 #if defined _G_IO_IO_FILE_VERSION && _G_IO_IO_FILE_VERSION == 0x20001
 312   _IO_off64_t _offset;
 313 # if defined _LIBC || defined _GLIBCPP_USE_WCHAR_T
 314   /* Wide character stream stuff.  */
 315   struct _IO_codecvt *_codecvt;
 316   struct _IO_wide_data *_wide_data;
 317 # else
 318   void *__pad1;
 319   void *__pad2;
 320 # endif
 321   int _mode;
 322   /* Make sure we don't get into trouble again.  */
 323   char _unused2[15 * sizeof (int) - 2 * sizeof (void *)];
 324 #endif
 325 };
 326
 327 #ifndef __cplusplus
 328 typedef struct _IO_FILE _IO_FILE;
 329 #endif
 330
 331 struct _IO_FILE_plus;
 332
 333 extern struct _IO_FILE_plus _IO_2_1_stdin_;
 334 extern struct _IO_FILE_plus _IO_2_1_stdout_;
 335 extern struct _IO_FILE_plus _IO_2_1_stderr_;
 336 #ifndef _LIBC
 337 #define _IO_stdin ((_IO_FILE*)(&_IO_2_1_stdin_))
 338 #define _IO_stdout ((_IO_FILE*)(&_IO_2_1_stdout_))
 339 #define _IO_stderr ((_IO_FILE*)(&_IO_2_1_stderr_))
 340 #else
 341 extern _IO_FILE *_IO_stdin attribute_hidden;
 342 extern _IO_FILE *_IO_stdout attribute_hidden;
 343 extern _IO_FILE *_IO_stderr attribute_hidden;
 344 #endif
 345
 346
 347 /* Functions to do I/O and file management for a stream.  */
 348
 349 /* Read NBYTES bytes from COOKIE into a buffer pointed to by BUF.
 350    Return number of bytes read.  */
 351 typedef __ssize_t __io_read_fn (void *__cookie, char *__buf, size_t __nbytes);
 352
 353 /* Write N bytes pointed to by BUF to COOKIE.  Write all N bytes
 354    unless there is an error.  Return number of bytes written, or -1 if
 355    there is an error without writing anything.  If the file has been
 356    opened for append (__mode.__append set), then set the file pointer
 357    to the end of the file and then do the write; if not, just write at
 358    the current file pointer.  */
 359 typedef __ssize_t __io_write_fn (void *__cookie, __const char *__buf,
 360                                  size_t __n);
 361
 362 /* Move COOKIE's file position to *POS bytes from the
 363    beginning of the file (if W is SEEK_SET),
 364    the current position (if W is SEEK_CUR),
 365    or the end of the file (if W is SEEK_END).
 366    Set *POS to the new file position.
 367    Returns zero if successful, nonzero if not.  */
 368 typedef int __io_seek_fn (void *__cookie, _IO_off64_t *__pos, int __w);
 369
 370 /* Close COOKIE.  */
 371 typedef int __io_close_fn (void *__cookie);
 372
 373
 374 #ifdef _GNU_SOURCE
 375 /* User-visible names for the above.  */
 376 typedef __io_read_fn cookie_read_function_t;
 377 typedef __io_write_fn cookie_write_function_t;
 378 typedef __io_seek_fn cookie_seek_function_t;
 379 typedef __io_close_fn cookie_close_function_t;
 380
 381 /* The structure with the cookie function pointers.  */
 382 typedef struct
 383 {
 384   __io_read_fn *read;           /* Read bytes.  */
 385   __io_write_fn *write;         /* Write bytes.  */
 386   __io_seek_fn *seek;           /* Seek/tell file position.  */
 387   __io_close_fn *close;         /* Close file.  */
 388 } _IO_cookie_io_functions_t;
 389 typedef _IO_cookie_io_functions_t cookie_io_functions_t;
 390
 391 struct _IO_cookie_file;
 392
 393 /* Initialize one of those.  */
 394 extern void _IO_cookie_init (struct _IO_cookie_file *__cfile, int __read_write,
 395                              void *__cookie, _IO_cookie_io_functions_t __fns);
 396 #endif
 397
 398
 399 #ifdef __cplusplus
 400 extern "C" {
 401 #endif
 402
 403 extern int __underflow (_IO_FILE *) __THROW;
 404 extern int __uflow (_IO_FILE *) __THROW;
 405 extern int __overflow (_IO_FILE *, int) __THROW;
 406 extern _IO_wint_t __wunderflow (_IO_FILE *) __THROW;
 407 extern _IO_wint_t __wuflow (_IO_FILE *) __THROW;
 408 extern _IO_wint_t __woverflow (_IO_FILE *, _IO_wint_t) __THROW;
 409
 410 #if  __GNUC__ >= 3
 411 # define _IO_BE(expr, res) __builtin_expect (expr, res)
 412 #else
 413 # define _IO_BE(expr, res) (expr)
 414 #endif
 415
 416 #define _IO_getc_unlocked(_fp) \
 417        (_IO_BE ((_fp)->_IO_read_ptr >= (_fp)->_IO_read_end, 0) \
 418         ? __uflow (_fp) : *(unsigned char *) (_fp)->_IO_read_ptr++)
 419 #define _IO_peekc_unlocked(_fp) \
 420        (_IO_BE ((_fp)->_IO_read_ptr >= (_fp)->_IO_read_end, 0) \
 421           && __underflow (_fp) == EOF ? EOF \
 422         : *(unsigned char *) (_fp)->_IO_read_ptr)
 423 #define _IO_putc_unlocked(_ch, _fp) \
 424    (_IO_BE ((_fp)->_IO_write_ptr >= (_fp)->_IO_write_end, 0) \
 425     ? __overflow (_fp, (unsigned char) (_ch)) \
 426     : (unsigned char) (*(_fp)->_IO_write_ptr++ = (_ch)))
 427
 428 #define _IO_getwc_unlocked(_fp) \
 429   (_IO_BE ((_fp)->_wide_data->_IO_read_ptr >= (_fp)->_wide_data->_IO_read_end,\
 430            0) \
 431    ? __wuflow (_fp) : (_IO_wint_t) *(_fp)->_wide_data->_IO_read_ptr++)
 432 #define _IO_putwc_unlocked(_wch, _fp) \
 433   (_IO_BE ((_fp)->_wide_data->_IO_write_ptr \
 434            >= (_fp)->_wide_data->_IO_write_end, 0) \
 435    ? __woverflow (_fp, _wch) \
 436    : (_IO_wint_t) (*(_fp)->_wide_data->_IO_write_ptr++ = (_wch)))
 437
 438 #define _IO_feof_unlocked(__fp) (((__fp)->_flags & _IO_EOF_SEEN) != 0)
 439 #define _IO_ferror_unlocked(__fp) (((__fp)->_flags & _IO_ERR_SEEN) != 0)
 440
 441 extern int _IO_getc (_IO_FILE *__fp) __THROW;
 442 extern int _IO_putc (int __c, _IO_FILE *__fp) __THROW;
 443 extern int _IO_feof (_IO_FILE *__fp) __THROW;
 444 extern int _IO_ferror (_IO_FILE *__fp) __THROW;
 445
 446 extern int _IO_peekc_locked (_IO_FILE *__fp) __THROW;
 447
 448 /* This one is for Emacs. */
 449 #define _IO_PENDING_OUTPUT_COUNT(_fp)   \
 450         ((_fp)->_IO_write_ptr - (_fp)->_IO_write_base)
 451
 452 extern void _IO_flockfile (_IO_FILE *) __THROW;
 453 extern void _IO_funlockfile (_IO_FILE *) __THROW;
 454 extern int _IO_ftrylockfile (_IO_FILE *) __THROW;
 455
 456 #ifdef _IO_MTSAFE_IO
 457 # define _IO_peekc(_fp) _IO_peekc_locked (_fp)
 458 # define _IO_flockfile(_fp) \
 459   if (((_fp)->_flags & _IO_USER_LOCK) == 0) _IO_flockfile (_fp)
 460 # define _IO_funlockfile(_fp) \
 461   if (((_fp)->_flags & _IO_USER_LOCK) == 0) _IO_funlockfile (_fp)
 462 #else
 463 # define _IO_peekc(_fp) _IO_peekc_unlocked (_fp)
 464 # define _IO_flockfile(_fp) /**/
 465 # define _IO_funlockfile(_fp) /**/
 466 # define _IO_ftrylockfile(_fp) /**/
 467 # define _IO_cleanup_region_start(_fct, _fp) /**/
 468 # define _IO_cleanup_region_end(_Doit) /**/
 469 #endif /* !_IO_MTSAFE_IO */
 470
 471 extern int _IO_vfscanf (_IO_FILE * __restrict, const char * __restrict,
 472                         _IO_va_list, int *__restrict) __THROW;
 473 extern int _IO_vfprintf (_IO_FILE *__restrict, const char *__restrict,
 474                          _IO_va_list) __THROW;
 475 extern _IO_ssize_t _IO_padn (_IO_FILE *, int, _IO_ssize_t) __THROW;
 476 extern _IO_size_t _IO_sgetn (_IO_FILE *, void *, _IO_size_t) __THROW;
 477
 478 extern _IO_off64_t _IO_seekoff (_IO_FILE *, _IO_off64_t, int, int) __THROW;
 479 extern _IO_off64_t _IO_seekpos (_IO_FILE *, _IO_off64_t, int) __THROW;
 480
 481 extern void _IO_free_backup_area (_IO_FILE *) __THROW;
 482
 483 #if defined _LIBC || defined _GLIBCPP_USE_WCHAR_T
 484 extern _IO_wint_t _IO_getwc (_IO_FILE *__fp) __THROW;
 485 extern _IO_wint_t _IO_putwc (wchar_t __wc, _IO_FILE *__fp) __THROW;
 486 extern int _IO_fwide (_IO_FILE *__fp, int __mode) __THROW;
 487 # if __GNUC__ >= 2
 488 /* While compiling glibc we have to handle compatibility with very old
 489    versions.  */
 490 #  if defined _LIBC && defined SHARED
 491 #   include <shlib-compat.h>
 492 #   if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_1)
 493 #    define _IO_fwide_maybe_incompatible \
 494   (__builtin_expect (&_IO_stdin_used == NULL, 0))
 495 extern const int _IO_stdin_used;
 496 weak_extern (_IO_stdin_used);
 497 #   endif
 498 #  endif
 499 #  ifndef _IO_fwide_maybe_incompatible
 500 #   define _IO_fwide_maybe_incompatible (0)
 501 #  endif
 502 /* A special optimized version of the function above.  It optimizes the
 503    case of initializing an unoriented byte stream.  */
 504 #  define _IO_fwide(__fp, __mode) \
 505   ({ int __result = (__mode);                                                 \
 506      if (__result < 0 && ! _IO_fwide_maybe_incompatible)                      \
 507        {                                                                      \
 508          if ((__fp)->_mode == 0)                                              \
 509            /* We know that all we have to do is to set the flag.  */          \
 510            (__fp)->_mode = -1;                                                \
 511          __result = (__fp)->_mode;                                            \
 512        }                                                                      \
 513      else if (__builtin_constant_p (__mode) && (__mode) == 0)                 \
 514        __result = _IO_fwide_maybe_incompatible ? -1 : (__fp)->_mode;          \
 515      else                                                                     \
 516        __result = _IO_fwide (__fp, __result);                                 \
 517      __result; })
 518 # endif
 519
 520 extern int _IO_vfwscanf (_IO_FILE * __restrict, const wchar_t * __restrict,
 521                          _IO_va_list, int *__restrict) __THROW;
 522 extern int _IO_vfwprintf (_IO_FILE *__restrict, const wchar_t *__restrict,
 523                           _IO_va_list) __THROW;
 524 extern _IO_ssize_t _IO_wpadn (_IO_FILE *, wint_t, _IO_ssize_t) __THROW;
 525 extern void _IO_free_wbackup_area (_IO_FILE *) __THROW;
 526 #endif
 527
 528 #ifdef __cplusplus
 529 }
 530 #endif
 531
 532 #endif /* _IO_STDIO_H */