libio/libio.h

   1 /* Copyright (C) 1991-1995,1997-2007,2009,2011,2012
   2    Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Written by Per Bothner <bothner@cygnus.com>.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, see
  18    <http://www.gnu.org/licenses/>.
  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 # include <sys/cdefs.h>
  62 #endif /*!__P*/
  63
  64 #define _IO_UNIFIED_JUMPTABLES 1
  65 #ifndef _G_HAVE_PRINTF_FP
  66 # define _IO_USE_DTOA 1
  67 #endif
  68
  69 #ifndef EOF
  70 # define EOF (-1)
  71 #endif
  72 #ifndef NULL
  73 # if defined __GNUG__ && \
  74     (__GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 8))
  75 #  define NULL (__null)
  76 # else
  77 #  if !defined(__cplusplus)
  78 #   define NULL ((void*)0)
  79 #  else
  80 #   define NULL (0)
  81 #  endif
  82 # endif
  83 #endif
  84
  85 #define _IOS_INPUT      1
  86 #define _IOS_OUTPUT     2
  87 #define _IOS_ATEND      4
  88 #define _IOS_APPEND     8
  89 #define _IOS_TRUNC      16
  90 #define _IOS_NOCREATE   32
  91 #define _IOS_NOREPLACE  64
  92 #define _IOS_BIN        128
  93
  94 /* Magic numbers and bits for the _flags field.
  95    The magic numbers use the high-order bits of _flags;
  96    the remaining bits are available for variable flags.
  97    Note: The magic numbers must all be negative if stdio
  98    emulation is desired. */
  99
 100 #define _IO_MAGIC 0xFBAD0000 /* Magic number */
 101 #define _OLD_STDIO_MAGIC 0xFABC0000 /* Emulate old stdio. */
 102 #define _IO_MAGIC_MASK 0xFFFF0000
 103 #define _IO_USER_BUF 1 /* User owns buffer; don't delete it on close. */
 104 #define _IO_UNBUFFERED 2
 105 #define _IO_NO_READS 4 /* Reading not allowed */
 106 #define _IO_NO_WRITES 8 /* Writing not allowd */
 107 #define _IO_EOF_SEEN 0x10
 108 #define _IO_ERR_SEEN 0x20
 109 #define _IO_DELETE_DONT_CLOSE 0x40 /* Don't call close(_fileno) on cleanup. */
 110 #define _IO_LINKED 0x80 /* Set if linked (using _chain) to streambuf::_list_all.*/
 111 #define _IO_IN_BACKUP 0x100
 112 #define _IO_LINE_BUF 0x200
 113 #define _IO_TIED_PUT_GET 0x400 /* Set if put and get pointer logicly tied. */
 114 #define _IO_CURRENTLY_PUTTING 0x800
 115 #define _IO_IS_APPENDING 0x1000
 116 #define _IO_IS_FILEBUF 0x2000
 117 #define _IO_BAD_SEEN 0x4000
 118 #define _IO_USER_LOCK 0x8000
 119
 120 #define _IO_FLAGS2_MMAP 1
 121 #define _IO_FLAGS2_NOTCANCEL 2
 122 #ifdef _LIBC
 123 # define _IO_FLAGS2_FORTIFY 4
 124 #endif
 125 #define _IO_FLAGS2_USER_WBUF 8
 126 #ifdef _LIBC
 127 # define _IO_FLAGS2_SCANF_STD 16
 128 # define _IO_FLAGS2_NOCLOSE 32
 129 # define _IO_FLAGS2_CLOEXEC 64
 130 #endif
 131
 132 /* These are "formatting flags" matching the iostream fmtflags enum values. */
 133 #define _IO_SKIPWS 01
 134 #define _IO_LEFT 02
 135 #define _IO_RIGHT 04
 136 #define _IO_INTERNAL 010
 137 #define _IO_DEC 020
 138 #define _IO_OCT 040
 139 #define _IO_HEX 0100
 140 #define _IO_SHOWBASE 0200
 141 #define _IO_SHOWPOINT 0400
 142 #define _IO_UPPERCASE 01000
 143 #define _IO_SHOWPOS 02000
 144 #define _IO_SCIENTIFIC 04000
 145 #define _IO_FIXED 010000
 146 #define _IO_UNITBUF 020000
 147 #define _IO_STDIO 040000
 148 #define _IO_DONT_CLOSE 0100000
 149 #define _IO_BOOLALPHA 0200000
 150
 151
 152 struct _IO_jump_t;  struct _IO_FILE;
 153
 154 /* Handle lock.  */
 155 #ifdef _IO_MTSAFE_IO
 156 # if defined __GLIBC__ && __GLIBC__ >= 2
 157 #  include <bits/stdio-lock.h>
 158 # else
 159 /*# include <comthread.h>*/
 160 # endif
 161 #else
 162 typedef void _IO_lock_t;
 163 #endif
 164
 165
 166 /* A streammarker remembers a position in a buffer. */
 167
 168 struct _IO_marker {
 169   struct _IO_marker *_next;
 170   struct _IO_FILE *_sbuf;
 171   /* If _pos >= 0
 172  it points to _buf->Gbase()+_pos. FIXME comment */
 173   /* if _pos < 0, it points to _buf->eBptr()+_pos. FIXME comment */
 174   int _pos;
 175 #if 0
 176     void set_streampos(streampos sp) { _spos = sp; }
 177     void set_offset(int offset) { _pos = offset; _spos = (streampos)(-2); }
 178   public:
 179     streammarker(streambuf *sb);
 180     ~streammarker();
 181     int saving() { return  _spos == -2; }
 182     int delta(streammarker&);
 183     int delta();
 184 #endif
 185 };
 186
 187 /* This is the structure from the libstdc++ codecvt class.  */
 188 enum __codecvt_result
 189 {
 190   __codecvt_ok,
 191   __codecvt_partial,
 192   __codecvt_error,
 193   __codecvt_noconv
 194 };
 195
 196 #if defined _LIBC || defined _GLIBCPP_USE_WCHAR_T
 197 /* The order of the elements in the following struct must match the order
 198    of the virtual functions in the libstdc++ codecvt class.  */
 199 struct _IO_codecvt
 200 {
 201   void (*__codecvt_destr) (struct _IO_codecvt *);
 202   enum __codecvt_result (*__codecvt_do_out) (struct _IO_codecvt *,
 203                                              __mbstate_t *,
 204                                              const wchar_t *,
 205                                              const wchar_t *,
 206                                              const wchar_t **, char *,
 207                                              char *, char **);
 208   enum __codecvt_result (*__codecvt_do_unshift) (struct _IO_codecvt *,
 209                                                  __mbstate_t *, char *,
 210                                                  char *, char **);
 211   enum __codecvt_result (*__codecvt_do_in) (struct _IO_codecvt *,
 212                                             __mbstate_t *,
 213                                             const char *, const char *,
 214                                             const char **, wchar_t *,
 215                                             wchar_t *, wchar_t **);
 216   int (*__codecvt_do_encoding) (struct _IO_codecvt *);
 217   int (*__codecvt_do_always_noconv) (struct _IO_codecvt *);
 218   int (*__codecvt_do_length) (struct _IO_codecvt *, __mbstate_t *,
 219                               const char *, const char *, _IO_size_t);
 220   int (*__codecvt_do_max_length) (struct _IO_codecvt *);
 221
 222   _IO_iconv_t __cd_in;
 223   _IO_iconv_t __cd_out;
 224 };
 225
 226 /* Extra data for wide character streams.  */
 227 struct _IO_wide_data
 228 {
 229   wchar_t *_IO_read_ptr;        /* Current read pointer */
 230   wchar_t *_IO_read_end;        /* End of get area. */
 231   wchar_t *_IO_read_base;       /* Start of putback+get area. */
 232   wchar_t *_IO_write_base;      /* Start of put area. */
 233   wchar_t *_IO_write_ptr;       /* Current put pointer. */
 234   wchar_t *_IO_write_end;       /* End of put area. */
 235   wchar_t *_IO_buf_base;        /* Start of reserve area. */
 236   wchar_t *_IO_buf_end;         /* End of reserve area. */
 237   /* The following fields are used to support backing up and undo. */
 238   wchar_t *_IO_save_base;       /* Pointer to start of non-current get area. */
 239   wchar_t *_IO_backup_base;     /* Pointer to first valid character of
 240                                    backup area */
 241   wchar_t *_IO_save_end;        /* Pointer to end of non-current get area. */
 242
 243   __mbstate_t _IO_state;
 244   __mbstate_t _IO_last_state;
 245   struct _IO_codecvt _codecvt;
 246
 247   wchar_t _shortbuf[1];
 248
 249   const struct _IO_jump_t *_wide_vtable;
 250 };
 251 #endif
 252
 253 struct _IO_FILE {
 254   int _flags;           /* High-order word is _IO_MAGIC; rest is flags. */
 255 #define _IO_file_flags _flags
 256
 257   /* The following pointers correspond to the C++ streambuf protocol. */
 258   /* Note:  Tk uses the _IO_read_ptr and _IO_read_end fields directly. */
 259   char* _IO_read_ptr;   /* Current read pointer */
 260   char* _IO_read_end;   /* End of get area. */
 261   char* _IO_read_base;  /* Start of putback+get area. */
 262   char* _IO_write_base; /* Start of put area. */
 263   char* _IO_write_ptr;  /* Current put pointer. */
 264   char* _IO_write_end;  /* End of put area. */
 265   char* _IO_buf_base;   /* Start of reserve area. */
 266   char* _IO_buf_end;    /* End of reserve area. */
 267   /* The following fields are used to support backing up and undo. */
 268   char *_IO_save_base; /* Pointer to start of non-current get area. */
 269   char *_IO_backup_base;  /* Pointer to first valid character of backup area */
 270   char *_IO_save_end; /* Pointer to end of non-current get area. */
 271
 272   struct _IO_marker *_markers;
 273
 274   struct _IO_FILE *_chain;
 275
 276   int _fileno;
 277 #if 0
 278   int _blksize;
 279 #else
 280   int _flags2;
 281 #endif
 282   _IO_off_t _old_offset; /* This used to be _offset but it's too small.  */
 283
 284 #define __HAVE_COLUMN /* temporary */
 285   /* 1+column number of pbase(); 0 is unknown. */
 286   unsigned short _cur_column;
 287   signed char _vtable_offset;
 288   char _shortbuf[1];
 289
 290   /*  char* _save_gptr;  char* _save_egptr; */
 291
 292   _IO_lock_t *_lock;
 293 #ifdef _IO_USE_OLD_IO_FILE
 294 };
 295
 296 struct _IO_FILE_complete
 297 {
 298   struct _IO_FILE _file;
 299 #endif
 300 #if defined _G_IO_IO_FILE_VERSION && _G_IO_IO_FILE_VERSION == 0x20001
 301   _IO_off64_t _offset;
 302 # if defined _LIBC || defined _GLIBCPP_USE_WCHAR_T
 303   /* Wide character stream stuff.  */
 304   struct _IO_codecvt *_codecvt;
 305   struct _IO_wide_data *_wide_data;
 306   struct _IO_FILE *_freeres_list;
 307   void *_freeres_buf;
 308   size_t _freeres_size;
 309 # else
 310   void *__pad1;
 311   void *__pad2;
 312   void *__pad3;
 313   void *__pad4;
 314   size_t __pad5;
 315 # endif
 316   int _mode;
 317   /* Make sure we don't get into trouble again.  */
 318   char _unused2[15 * sizeof (int) - 4 * sizeof (void *) - sizeof (size_t)];
 319 #endif
 320 };
 321
 322 #ifndef __cplusplus
 323 typedef struct _IO_FILE _IO_FILE;
 324 #endif
 325
 326 struct _IO_FILE_plus;
 327
 328 extern struct _IO_FILE_plus _IO_2_1_stdin_;
 329 extern struct _IO_FILE_plus _IO_2_1_stdout_;
 330 extern struct _IO_FILE_plus _IO_2_1_stderr_;
 331 #ifndef _LIBC
 332 #define _IO_stdin ((_IO_FILE*)(&_IO_2_1_stdin_))
 333 #define _IO_stdout ((_IO_FILE*)(&_IO_2_1_stdout_))
 334 #define _IO_stderr ((_IO_FILE*)(&_IO_2_1_stderr_))
 335 #else
 336 extern _IO_FILE *_IO_stdin attribute_hidden;
 337 extern _IO_FILE *_IO_stdout attribute_hidden;
 338 extern _IO_FILE *_IO_stderr attribute_hidden;
 339 #endif
 340
 341
 342 /* Functions to do I/O and file management for a stream.  */
 343
 344 /* Read NBYTES bytes from COOKIE into a buffer pointed to by BUF.
 345    Return number of bytes read.  */
 346 typedef __ssize_t __io_read_fn (void *__cookie, char *__buf, size_t __nbytes);
 347
 348 /* Write N bytes pointed to by BUF to COOKIE.  Write all N bytes
 349    unless there is an error.  Return number of bytes written.  If
 350    there is an error, return 0 and do not write anything.  If the file
 351    has been opened for append (__mode.__append set), then set the file
 352    pointer to the end of the file and then do the write; if not, just
 353    write at the current file pointer.  */
 354 typedef __ssize_t __io_write_fn (void *__cookie, const char *__buf,
 355                                  size_t __n);
 356
 357 /* Move COOKIE's file position to *POS bytes from the
 358    beginning of the file (if W is SEEK_SET),
 359    the current position (if W is SEEK_CUR),
 360    or the end of the file (if W is SEEK_END).
 361    Set *POS to the new file position.
 362    Returns zero if successful, nonzero if not.  */
 363 typedef int __io_seek_fn (void *__cookie, _IO_off64_t *__pos, int __w);
 364
 365 /* Close COOKIE.  */
 366 typedef int __io_close_fn (void *__cookie);
 367
 368
 369 #ifdef _GNU_SOURCE
 370 /* User-visible names for the above.  */
 371 typedef __io_read_fn cookie_read_function_t;
 372 typedef __io_write_fn cookie_write_function_t;
 373 typedef __io_seek_fn cookie_seek_function_t;
 374 typedef __io_close_fn cookie_close_function_t;
 375
 376 /* The structure with the cookie function pointers.  */
 377 typedef struct
 378 {
 379   __io_read_fn *read;           /* Read bytes.  */
 380   __io_write_fn *write;         /* Write bytes.  */
 381   __io_seek_fn *seek;           /* Seek/tell file position.  */
 382   __io_close_fn *close;         /* Close file.  */
 383 } _IO_cookie_io_functions_t;
 384 typedef _IO_cookie_io_functions_t cookie_io_functions_t;
 385
 386 struct _IO_cookie_file;
 387
 388 /* Initialize one of those.  */
 389 extern void _IO_cookie_init (struct _IO_cookie_file *__cfile, int __read_write,
 390                              void *__cookie, _IO_cookie_io_functions_t __fns);
 391 #endif
 392
 393
 394 #ifdef __cplusplus
 395 extern "C" {
 396 #endif
 397
 398 extern int __underflow (_IO_FILE *);
 399 extern int __uflow (_IO_FILE *);
 400 extern int __overflow (_IO_FILE *, int);
 401 #if defined _LIBC || defined _GLIBCPP_USE_WCHAR_T
 402 extern _IO_wint_t __wunderflow (_IO_FILE *);
 403 extern _IO_wint_t __wuflow (_IO_FILE *);
 404 extern _IO_wint_t __woverflow (_IO_FILE *, _IO_wint_t);
 405 #endif
 406
 407 #if  __GNUC__ >= 3
 408 # define _IO_BE(expr, res) __builtin_expect ((expr), res)
 409 #else
 410 # define _IO_BE(expr, res) (expr)
 411 #endif
 412
 413 #define _IO_getc_unlocked(_fp) \
 414        (_IO_BE ((_fp)->_IO_read_ptr >= (_fp)->_IO_read_end, 0) \
 415         ? __uflow (_fp) : *(unsigned char *) (_fp)->_IO_read_ptr++)
 416 #define _IO_peekc_unlocked(_fp) \
 417        (_IO_BE ((_fp)->_IO_read_ptr >= (_fp)->_IO_read_end, 0) \
 418           && __underflow (_fp) == EOF ? EOF \
 419         : *(unsigned char *) (_fp)->_IO_read_ptr)
 420 #define _IO_putc_unlocked(_ch, _fp) \
 421    (_IO_BE ((_fp)->_IO_write_ptr >= (_fp)->_IO_write_end, 0) \
 422     ? __overflow (_fp, (unsigned char) (_ch)) \
 423     : (unsigned char) (*(_fp)->_IO_write_ptr++ = (_ch)))
 424
 425 #if defined _LIBC || defined _GLIBCPP_USE_WCHAR_T
 426 # define _IO_getwc_unlocked(_fp) \
 427   (_IO_BE ((_fp)->_wide_data == NULL                                    \
 428            || ((_fp)->_wide_data->_IO_read_ptr                          \
 429                >= (_fp)->_wide_data->_IO_read_end), 0)                  \
 430    ? __wuflow (_fp) : (_IO_wint_t) *(_fp)->_wide_data->_IO_read_ptr++)
 431 # define _IO_putwc_unlocked(_wch, _fp) \
 432   (_IO_BE ((_fp)->_wide_data == NULL                                    \
 433            || ((_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 #endif
 438
 439 #define _IO_feof_unlocked(__fp) (((__fp)->_flags & _IO_EOF_SEEN) != 0)
 440 #define _IO_ferror_unlocked(__fp) (((__fp)->_flags & _IO_ERR_SEEN) != 0)
 441
 442 extern int _IO_getc (_IO_FILE *__fp);
 443 extern int _IO_putc (int __c, _IO_FILE *__fp);
 444 extern int _IO_feof (_IO_FILE *__fp) __THROW;
 445 extern int _IO_ferror (_IO_FILE *__fp) __THROW;
 446
 447 extern int _IO_peekc_locked (_IO_FILE *__fp);
 448
 449 /* This one is for Emacs. */
 450 #define _IO_PENDING_OUTPUT_COUNT(_fp)   \
 451         ((_fp)->_IO_write_ptr - (_fp)->_IO_write_base)
 452
 453 extern void _IO_flockfile (_IO_FILE *) __THROW;
 454 extern void _IO_funlockfile (_IO_FILE *) __THROW;
 455 extern int _IO_ftrylockfile (_IO_FILE *) __THROW;
 456
 457 #ifdef _IO_MTSAFE_IO
 458 # define _IO_peekc(_fp) _IO_peekc_locked (_fp)
 459 # define _IO_flockfile(_fp) \
 460   if (((_fp)->_flags & _IO_USER_LOCK) == 0) _IO_flockfile (_fp)
 461 # define _IO_funlockfile(_fp) \
 462   if (((_fp)->_flags & _IO_USER_LOCK) == 0) _IO_funlockfile (_fp)
 463 #else
 464 # define _IO_peekc(_fp) _IO_peekc_unlocked (_fp)
 465 # define _IO_flockfile(_fp) /**/
 466 # define _IO_funlockfile(_fp) /**/
 467 # define _IO_ftrylockfile(_fp) /**/
 468 # define _IO_cleanup_region_start(_fct, _fp) /**/
 469 # define _IO_cleanup_region_end(_Doit) /**/
 470 #endif /* !_IO_MTSAFE_IO */
 471
 472 extern int _IO_vfscanf (_IO_FILE * __restrict, const char * __restrict,
 473                         _IO_va_list, int *__restrict);
 474 extern int _IO_vfprintf (_IO_FILE *__restrict, const char *__restrict,
 475                          _IO_va_list);
 476 extern _IO_ssize_t _IO_padn (_IO_FILE *, int, _IO_ssize_t);
 477 extern _IO_size_t _IO_sgetn (_IO_FILE *, void *, _IO_size_t);
 478
 479 extern _IO_off64_t _IO_seekoff (_IO_FILE *, _IO_off64_t, int, int);
 480 extern _IO_off64_t _IO_seekpos (_IO_FILE *, _IO_off64_t, int);
 481
 482 extern void _IO_free_backup_area (_IO_FILE *) __THROW;
 483
 484 #if defined _LIBC || defined _GLIBCPP_USE_WCHAR_T
 485 extern _IO_wint_t _IO_getwc (_IO_FILE *__fp);
 486 extern _IO_wint_t _IO_putwc (wchar_t __wc, _IO_FILE *__fp);
 487 extern int _IO_fwide (_IO_FILE *__fp, int __mode) __THROW;
 488 # if __GNUC__ >= 2
 489 /* While compiling glibc we have to handle compatibility with very old
 490    versions.  */
 491 #  if defined _LIBC && defined SHARED
 492 #   include <shlib-compat.h>
 493 #   if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_1)
 494 #    define _IO_fwide_maybe_incompatible \
 495   (__builtin_expect (&_IO_stdin_used == NULL, 0))
 496 extern const int _IO_stdin_used;
 497 weak_extern (_IO_stdin_used);
 498 #   endif
 499 #  endif
 500 #  ifndef _IO_fwide_maybe_incompatible
 501 #   define _IO_fwide_maybe_incompatible (0)
 502 #  endif
 503 /* A special optimized version of the function above.  It optimizes the
 504    case of initializing an unoriented byte stream.  */
 505 #  define _IO_fwide(__fp, __mode) \
 506   ({ int __result = (__mode);                                                 \
 507      if (__result < 0 && ! _IO_fwide_maybe_incompatible)                      \
 508        {                                                                      \
 509          if ((__fp)->_mode == 0)                                              \
 510            /* We know that all we have to do is to set the flag.  */          \
 511            (__fp)->_mode = -1;                                                \
 512          __result = (__fp)->_mode;                                            \
 513        }                                                                      \
 514      else if (__builtin_constant_p (__mode) && (__mode) == 0)                 \
 515        __result = _IO_fwide_maybe_incompatible ? -1 : (__fp)->_mode;          \
 516      else                                                                     \
 517        __result = _IO_fwide (__fp, __result);                                 \
 518      __result; })
 519 # endif
 520
 521 extern int _IO_vfwscanf (_IO_FILE * __restrict, const wchar_t * __restrict,
 522                          _IO_va_list, int *__restrict);
 523 extern int _IO_vfwprintf (_IO_FILE *__restrict, const wchar_t *__restrict,
 524                           _IO_va_list);
 525 extern _IO_ssize_t _IO_wpadn (_IO_FILE *, wint_t, _IO_ssize_t);
 526 extern void _IO_free_wbackup_area (_IO_FILE *) __THROW;
 527 #endif
 528
 529 #ifdef __LDBL_COMPAT
 530 # include <bits/libio-ldbl.h>
 531 #endif
 532
 533 #ifdef __cplusplus
 534 }
 535 #endif
 536
 537 #endif /* _IO_STDIO_H */