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, write to the Free
  18    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19    02111-1307 USA.
  20
  21    As a special exception, if you link the code in this file with
  22    files compiled with a GNU compiler to produce an executable,
  23    that does not cause the resulting executable to be covered by
  24    the GNU Lesser General Public License.  This exception does not
  25    however invalidate any other reasons why the executable file
  26    might be covered by the GNU Lesser General Public License.
  27    This exception applies to code released by its copyright holders
  28    in files containing the exception.  */
  29
  30 #ifndef _IO_STDIO_H
  31 #define _IO_STDIO_H
  32
  33 #include <_G_config.h>
  34 /* ALL of these should be defined in _G_config.h */
  35 #define _IO_pos_t _G_fpos_t /* obsolete */
  36 #define _IO_fpos_t _G_fpos_t
  37 #define _IO_fpos64_t _G_fpos64_t
  38 #define _IO_size_t _G_size_t
  39 #define _IO_ssize_t _G_ssize_t
  40 #define _IO_off_t _G_off_t
  41 #define _IO_off64_t _G_off64_t
  42 #define _IO_pid_t _G_pid_t
  43 #define _IO_uid_t _G_uid_t
  44 #define _IO_iconv_t _G_iconv_t
  45 #define _IO_HAVE_SYS_WAIT _G_HAVE_SYS_WAIT
  46 #define _IO_HAVE_ST_BLKSIZE _G_HAVE_ST_BLKSIZE
  47 #define _IO_BUFSIZ _G_BUFSIZ
  48 #define _IO_va_list _G_va_list
  49 #define _IO_wint_t _G_wint_t
  50
  51 #ifdef _G_NEED_STDARG_H
  52 /* This define avoids name pollution if we're using GNU stdarg.h */
  53 # define __need___va_list
  54 # include <stdarg.h>
  55 # ifdef __GNUC_VA_LIST
  56 #  undef _IO_va_list
  57 #  define _IO_va_list __gnuc_va_list
  58 # endif /* __GNUC_VA_LIST */
  59 #endif
  60
  61 #ifndef __P
  62 # include <sys/cdefs.h>
  63 #endif /*!__P*/
  64
  65 #define _IO_UNIFIED_JUMPTABLES 1
  66 #ifndef _G_HAVE_PRINTF_FP
  67 # define _IO_USE_DTOA 1
  68 #endif
  69
  70 #ifndef EOF
  71 # define EOF (-1)
  72 #endif
  73 #ifndef NULL
  74 # if defined __GNUG__ && \
  75     (__GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 8))
  76 #  define NULL (__null)
  77 # else
  78 #  if !defined(__cplusplus)
  79 #   define NULL ((void*)0)
  80 #  else
  81 #   define NULL (0)
  82 #  endif
  83 # endif
  84 #endif
  85
  86 #define _IOS_INPUT      1
  87 #define _IOS_OUTPUT     2
  88 #define _IOS_ATEND      4
  89 #define _IOS_APPEND     8
  90 #define _IOS_TRUNC      16
  91 #define _IOS_NOCREATE   32
  92 #define _IOS_NOREPLACE  64
  93 #define _IOS_BIN        128
  94
  95 /* Magic numbers and bits for the _flags field.
  96    The magic numbers use the high-order bits of _flags;
  97    the remaining bits are available for variable flags.
  98    Note: The magic numbers must all be negative if stdio
  99    emulation is desired. */
 100
 101 #define _IO_MAGIC 0xFBAD0000 /* Magic number */
 102 #define _OLD_STDIO_MAGIC 0xFABC0000 /* Emulate old stdio. */
 103 #define _IO_MAGIC_MASK 0xFFFF0000
 104 #define _IO_USER_BUF 1 /* User owns buffer; don't delete it on close. */
 105 #define _IO_UNBUFFERED 2
 106 #define _IO_NO_READS 4 /* Reading not allowed */
 107 #define _IO_NO_WRITES 8 /* Writing not allowd */
 108 #define _IO_EOF_SEEN 0x10
 109 #define _IO_ERR_SEEN 0x20
 110 #define _IO_DELETE_DONT_CLOSE 0x40 /* Don't call close(_fileno) on cleanup. */
 111 #define _IO_LINKED 0x80 /* Set if linked (using _chain) to streambuf::_list_all.*/
 112 #define _IO_IN_BACKUP 0x100
 113 #define _IO_LINE_BUF 0x200
 114 #define _IO_TIED_PUT_GET 0x400 /* Set if put and get pointer logicly tied. */
 115 #define _IO_CURRENTLY_PUTTING 0x800
 116 #define _IO_IS_APPENDING 0x1000
 117 #define _IO_IS_FILEBUF 0x2000
 118 #define _IO_BAD_SEEN 0x4000
 119 #define _IO_USER_LOCK 0x8000
 120
 121 #define _IO_FLAGS2_MMAP 1
 122 #define _IO_FLAGS2_NOTCANCEL 2
 123 #ifdef _LIBC
 124 # define _IO_FLAGS2_FORTIFY 4
 125 #endif
 126 #define _IO_FLAGS2_USER_WBUF 8
 127 #ifdef _LIBC
 128 # define _IO_FLAGS2_SCANF_STD 16
 129 # define _IO_FLAGS2_NOCLOSE 32
 130 # define _IO_FLAGS2_CLOEXEC 64
 131 #endif
 132
 133 /* These are "formatting flags" matching the iostream fmtflags enum values. */
 134 #define _IO_SKIPWS 01
 135 #define _IO_LEFT 02
 136 #define _IO_RIGHT 04
 137 #define _IO_INTERNAL 010
 138 #define _IO_DEC 020
 139 #define _IO_OCT 040
 140 #define _IO_HEX 0100
 141 #define _IO_SHOWBASE 0200
 142 #define _IO_SHOWPOINT 0400
 143 #define _IO_UPPERCASE 01000
 144 #define _IO_SHOWPOS 02000
 145 #define _IO_SCIENTIFIC 04000
 146 #define _IO_FIXED 010000
 147 #define _IO_UNITBUF 020000
 148 #define _IO_STDIO 040000
 149 #define _IO_DONT_CLOSE 0100000
 150 #define _IO_BOOLALPHA 0200000
 151
 152
 153 struct _IO_jump_t;  struct _IO_FILE;
 154
 155 /* Handle lock.  */
 156 #ifdef _IO_MTSAFE_IO
 157 # if defined __GLIBC__ && __GLIBC__ >= 2
 158 #  include <bits/stdio-lock.h>
 159 # else
 160 /*# include <comthread.h>*/
 161 # endif
 162 #else
 163 typedef void _IO_lock_t;
 164 #endif
 165
 166
 167 /* A streammarker remembers a position in a buffer. */
 168
 169 struct _IO_marker {
 170   struct _IO_marker *_next;
 171   struct _IO_FILE *_sbuf;
 172   /* If _pos >= 0
 173  it points to _buf->Gbase()+_pos. FIXME comment */
 174   /* if _pos < 0, it points to _buf->eBptr()+_pos. FIXME comment */
 175   int _pos;
 176 #if 0
 177     void set_streampos(streampos sp) { _spos = sp; }
 178     void set_offset(int offset) { _pos = offset; _spos = (streampos)(-2); }
 179   public:
 180     streammarker(streambuf *sb);
 181     ~streammarker();
 182     int saving() { return  _spos == -2; }
 183     int delta(streammarker&);
 184     int delta();
 185 #endif
 186 };
 187
 188 /* This is the structure from the libstdc++ codecvt class.  */
 189 enum __codecvt_result
 190 {
 191   __codecvt_ok,
 192   __codecvt_partial,
 193   __codecvt_error,
 194   __codecvt_noconv
 195 };
 196
 197 #if defined _LIBC || defined _GLIBCPP_USE_WCHAR_T
 198 /* The order of the elements in the following struct must match the order
 199    of the virtual functions in the libstdc++ codecvt class.  */
 200 struct _IO_codecvt
 201 {
 202   void (*__codecvt_destr) (struct _IO_codecvt *);
 203   enum __codecvt_result (*__codecvt_do_out) (struct _IO_codecvt *,
 204                                              __mbstate_t *,
 205                                              const wchar_t *,
 206                                              const wchar_t *,
 207                                              const wchar_t **, char *,
 208                                              char *, char **);
 209   enum __codecvt_result (*__codecvt_do_unshift) (struct _IO_codecvt *,
 210                                                  __mbstate_t *, char *,
 211                                                  char *, char **);
 212   enum __codecvt_result (*__codecvt_do_in) (struct _IO_codecvt *,
 213                                             __mbstate_t *,
 214                                             const char *, const char *,
 215                                             const char **, wchar_t *,
 216                                             wchar_t *, wchar_t **);
 217   int (*__codecvt_do_encoding) (struct _IO_codecvt *);
 218   int (*__codecvt_do_always_noconv) (struct _IO_codecvt *);
 219   int (*__codecvt_do_length) (struct _IO_codecvt *, __mbstate_t *,
 220                               const char *, const char *, _IO_size_t);
 221   int (*__codecvt_do_max_length) (struct _IO_codecvt *);
 222
 223   _IO_iconv_t __cd_in;
 224   _IO_iconv_t __cd_out;
 225 };
 226
 227 /* Extra data for wide character streams.  */
 228 struct _IO_wide_data
 229 {
 230   wchar_t *_IO_read_ptr;        /* Current read pointer */
 231   wchar_t *_IO_read_end;        /* End of get area. */
 232   wchar_t *_IO_read_base;       /* Start of putback+get area. */
 233   wchar_t *_IO_write_base;      /* Start of put area. */
 234   wchar_t *_IO_write_ptr;       /* Current put pointer. */
 235   wchar_t *_IO_write_end;       /* End of put area. */
 236   wchar_t *_IO_buf_base;        /* Start of reserve area. */
 237   wchar_t *_IO_buf_end;         /* End of reserve area. */
 238   /* The following fields are used to support backing up and undo. */
 239   wchar_t *_IO_save_base;       /* Pointer to start of non-current get area. */
 240   wchar_t *_IO_backup_base;     /* Pointer to first valid character of
 241                                    backup area */
 242   wchar_t *_IO_save_end;        /* Pointer to end of non-current get area. */
 243
 244   __mbstate_t _IO_state;
 245   __mbstate_t _IO_last_state;
 246   struct _IO_codecvt _codecvt;
 247
 248   wchar_t _shortbuf[1];
 249
 250   const struct _IO_jump_t *_wide_vtable;
 251 };
 252 #endif
 253
 254 struct _IO_FILE {
 255   int _flags;           /* High-order word is _IO_MAGIC; rest is flags. */
 256 #define _IO_file_flags _flags
 257
 258   /* The following pointers correspond to the C++ streambuf protocol. */
 259   /* Note:  Tk uses the _IO_read_ptr and _IO_read_end fields directly. */
 260   char* _IO_read_ptr;   /* Current read pointer */
 261   char* _IO_read_end;   /* End of get area. */
 262   char* _IO_read_base;  /* Start of putback+get area. */
 263   char* _IO_write_base; /* Start of put area. */
 264   char* _IO_write_ptr;  /* Current put pointer. */
 265   char* _IO_write_end;  /* End of put area. */
 266   char* _IO_buf_base;   /* Start of reserve area. */
 267   char* _IO_buf_end;    /* End of reserve area. */
 268   /* The following fields are used to support backing up and undo. */
 269   char *_IO_save_base; /* Pointer to start of non-current get area. */
 270   char *_IO_backup_base;  /* Pointer to first valid character of backup area */
 271   char *_IO_save_end; /* Pointer to end of non-current get area. */
 272
 273   struct _IO_marker *_markers;
 274
 275   struct _IO_FILE *_chain;
 276
 277   int _fileno;
 278 #if 0
 279   int _blksize;
 280 #else
 281   int _flags2;
 282 #endif
 283   _IO_off_t _old_offset; /* This used to be _offset but it's too small.  */
 284
 285 #define __HAVE_COLUMN /* temporary */
 286   /* 1+column number of pbase(); 0 is unknown. */
 287   unsigned short _cur_column;
 288   signed char _vtable_offset;
 289   char _shortbuf[1];
 290
 291   /*  char* _save_gptr;  char* _save_egptr; */
 292
 293   _IO_lock_t *_lock;
 294 #ifdef _IO_USE_OLD_IO_FILE
 295 };
 296
 297 struct _IO_FILE_complete
 298 {
 299   struct _IO_FILE _file;
 300 #endif
 301 #if defined _G_IO_IO_FILE_VERSION && _G_IO_IO_FILE_VERSION == 0x20001
 302   _IO_off64_t _offset;
 303 # if defined _LIBC || defined _GLIBCPP_USE_WCHAR_T
 304   /* Wide character stream stuff.  */
 305   struct _IO_codecvt *_codecvt;
 306   struct _IO_wide_data *_wide_data;
 307   struct _IO_FILE *_freeres_list;
 308   void *_freeres_buf;
 309   size_t _freeres_size;
 310 # else
 311   void *__pad1;
 312   void *__pad2;
 313   void *__pad3;
 314   void *__pad4;
 315   size_t __pad5;
 316 # endif
 317   int _mode;
 318   /* Make sure we don't get into trouble again.  */
 319   char _unused2[15 * sizeof (int) - 4 * sizeof (void *) - sizeof (size_t)];
 320 #endif
 321 };
 322
 323 #ifndef __cplusplus
 324 typedef struct _IO_FILE _IO_FILE;
 325 #endif
 326
 327 struct _IO_FILE_plus;
 328
 329 extern struct _IO_FILE_plus _IO_2_1_stdin_;
 330 extern struct _IO_FILE_plus _IO_2_1_stdout_;
 331 extern struct _IO_FILE_plus _IO_2_1_stderr_;
 332 #ifndef _LIBC
 333 #define _IO_stdin ((_IO_FILE*)(&_IO_2_1_stdin_))
 334 #define _IO_stdout ((_IO_FILE*)(&_IO_2_1_stdout_))
 335 #define _IO_stderr ((_IO_FILE*)(&_IO_2_1_stderr_))
 336 #else
 337 extern _IO_FILE *_IO_stdin attribute_hidden;
 338 extern _IO_FILE *_IO_stdout attribute_hidden;
 339 extern _IO_FILE *_IO_stderr attribute_hidden;
 340 #endif
 341
 342
 343 /* Functions to do I/O and file management for a stream.  */
 344
 345 /* Read NBYTES bytes from COOKIE into a buffer pointed to by BUF.
 346    Return number of bytes read.  */
 347 typedef __ssize_t __io_read_fn (void *__cookie, char *__buf, size_t __nbytes);
 348
 349 /* Write N bytes pointed to by BUF to COOKIE.  Write all N bytes
 350    unless there is an error.  Return number of bytes written, or -1 if
 351    there is an error without writing anything.  If the file has been
 352    opened for append (__mode.__append set), then set the file pointer
 353    to the end of the file and then do the write; if not, just write at
 354    the current file pointer.  */
 355 typedef __ssize_t __io_write_fn (void *__cookie, const char *__buf,
 356                                  size_t __n);
 357
 358 /* Move COOKIE's file position to *POS bytes from the
 359    beginning of the file (if W is SEEK_SET),
 360    the current position (if W is SEEK_CUR),
 361    or the end of the file (if W is SEEK_END).
 362    Set *POS to the new file position.
 363    Returns zero if successful, nonzero if not.  */
 364 typedef int __io_seek_fn (void *__cookie, _IO_off64_t *__pos, int __w);
 365
 366 /* Close COOKIE.  */
 367 typedef int __io_close_fn (void *__cookie);
 368
 369
 370 #ifdef _GNU_SOURCE
 371 /* User-visible names for the above.  */
 372 typedef __io_read_fn cookie_read_function_t;
 373 typedef __io_write_fn cookie_write_function_t;
 374 typedef __io_seek_fn cookie_seek_function_t;
 375 typedef __io_close_fn cookie_close_function_t;
 376
 377 /* The structure with the cookie function pointers.  */
 378 typedef struct
 379 {
 380   __io_read_fn *read;           /* Read bytes.  */
 381   __io_write_fn *write;         /* Write bytes.  */
 382   __io_seek_fn *seek;           /* Seek/tell file position.  */
 383   __io_close_fn *close;         /* Close file.  */
 384 } _IO_cookie_io_functions_t;
 385 typedef _IO_cookie_io_functions_t cookie_io_functions_t;
 386
 387 struct _IO_cookie_file;
 388
 389 /* Initialize one of those.  */
 390 extern void _IO_cookie_init (struct _IO_cookie_file *__cfile, int __read_write,
 391                              void *__cookie, _IO_cookie_io_functions_t __fns);
 392 #endif
 393
 394
 395 #ifdef __cplusplus
 396 extern "C" {
 397 #endif
 398
 399 extern int __underflow (_IO_FILE *);
 400 extern int __uflow (_IO_FILE *);
 401 extern int __overflow (_IO_FILE *, int);
 402 #if defined _LIBC || defined _GLIBCPP_USE_WCHAR_T
 403 extern _IO_wint_t __wunderflow (_IO_FILE *);
 404 extern _IO_wint_t __wuflow (_IO_FILE *);
 405 extern _IO_wint_t __woverflow (_IO_FILE *, _IO_wint_t);
 406 #endif
 407
 408 #if  __GNUC__ >= 3
 409 # define _IO_BE(expr, res) __builtin_expect ((expr), res)
 410 #else
 411 # define _IO_BE(expr, res) (expr)
 412 #endif
 413
 414 #define _IO_getc_unlocked(_fp) \
 415        (_IO_BE ((_fp)->_IO_read_ptr >= (_fp)->_IO_read_end, 0) \
 416         ? __uflow (_fp) : *(unsigned char *) (_fp)->_IO_read_ptr++)
 417 #define _IO_peekc_unlocked(_fp) \
 418        (_IO_BE ((_fp)->_IO_read_ptr >= (_fp)->_IO_read_end, 0) \
 419           && __underflow (_fp) == EOF ? EOF \
 420         : *(unsigned char *) (_fp)->_IO_read_ptr)
 421 #define _IO_putc_unlocked(_ch, _fp) \
 422    (_IO_BE ((_fp)->_IO_write_ptr >= (_fp)->_IO_write_end, 0) \
 423     ? __overflow (_fp, (unsigned char) (_ch)) \
 424     : (unsigned char) (*(_fp)->_IO_write_ptr++ = (_ch)))
 425
 426 #if defined _LIBC || defined _GLIBCPP_USE_WCHAR_T
 427 # define _IO_getwc_unlocked(_fp) \
 428   (_IO_BE ((_fp)->_wide_data == NULL                                    \
 429            || ((_fp)->_wide_data->_IO_read_ptr                          \
 430                >= (_fp)->_wide_data->_IO_read_end), 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 == NULL                                    \
 434            || ((_fp)->_wide_data->_IO_write_ptr                         \
 435                >= (_fp)->_wide_data->_IO_write_end), 0)                 \
 436    ? __woverflow (_fp, _wch)                                            \
 437    : (_IO_wint_t) (*(_fp)->_wide_data->_IO_write_ptr++ = (_wch)))
 438 #endif
 439
 440 #define _IO_feof_unlocked(__fp) (((__fp)->_flags & _IO_EOF_SEEN) != 0)
 441 #define _IO_ferror_unlocked(__fp) (((__fp)->_flags & _IO_ERR_SEEN) != 0)
 442
 443 extern int _IO_getc (_IO_FILE *__fp);
 444 extern int _IO_putc (int __c, _IO_FILE *__fp);
 445 extern int _IO_feof (_IO_FILE *__fp) __THROW;
 446 extern int _IO_ferror (_IO_FILE *__fp) __THROW;
 447
 448 extern int _IO_peekc_locked (_IO_FILE *__fp);
 449
 450 /* This one is for Emacs. */
 451 #define _IO_PENDING_OUTPUT_COUNT(_fp)   \
 452         ((_fp)->_IO_write_ptr - (_fp)->_IO_write_base)
 453
 454 extern void _IO_flockfile (_IO_FILE *) __THROW;
 455 extern void _IO_funlockfile (_IO_FILE *) __THROW;
 456 extern int _IO_ftrylockfile (_IO_FILE *) __THROW;
 457
 458 #ifdef _IO_MTSAFE_IO
 459 # define _IO_peekc(_fp) _IO_peekc_locked (_fp)
 460 # define _IO_flockfile(_fp) \
 461   if (((_fp)->_flags & _IO_USER_LOCK) == 0) _IO_flockfile (_fp)
 462 # define _IO_funlockfile(_fp) \
 463   if (((_fp)->_flags & _IO_USER_LOCK) == 0) _IO_funlockfile (_fp)
 464 #else
 465 # define _IO_peekc(_fp) _IO_peekc_unlocked (_fp)
 466 # define _IO_flockfile(_fp) /**/
 467 # define _IO_funlockfile(_fp) /**/
 468 # define _IO_ftrylockfile(_fp) /**/
 469 # define _IO_cleanup_region_start(_fct, _fp) /**/
 470 # define _IO_cleanup_region_end(_Doit) /**/
 471 #endif /* !_IO_MTSAFE_IO */
 472
 473 extern int _IO_vfscanf (_IO_FILE * __restrict, const char * __restrict,
 474                         _IO_va_list, int *__restrict);
 475 extern int _IO_vfprintf (_IO_FILE *__restrict, const char *__restrict,
 476                          _IO_va_list);
 477 extern _IO_ssize_t _IO_padn (_IO_FILE *, int, _IO_ssize_t);
 478 extern _IO_size_t _IO_sgetn (_IO_FILE *, void *, _IO_size_t);
 479
 480 extern _IO_off64_t _IO_seekoff (_IO_FILE *, _IO_off64_t, int, int);
 481 extern _IO_off64_t _IO_seekpos (_IO_FILE *, _IO_off64_t, int);
 482
 483 extern void _IO_free_backup_area (_IO_FILE *) __THROW;
 484
 485 #if defined _LIBC || defined _GLIBCPP_USE_WCHAR_T
 486 extern _IO_wint_t _IO_getwc (_IO_FILE *__fp);
 487 extern _IO_wint_t _IO_putwc (wchar_t __wc, _IO_FILE *__fp);
 488 extern int _IO_fwide (_IO_FILE *__fp, int __mode) __THROW;
 489 # if __GNUC__ >= 2
 490 /* While compiling glibc we have to handle compatibility with very old
 491    versions.  */
 492 #  if defined _LIBC && defined SHARED
 493 #   include <shlib-compat.h>
 494 #   if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_1)
 495 #    define _IO_fwide_maybe_incompatible \
 496   (__builtin_expect (&_IO_stdin_used == NULL, 0))
 497 extern const int _IO_stdin_used;
 498 weak_extern (_IO_stdin_used);
 499 #   endif
 500 #  endif
 501 #  ifndef _IO_fwide_maybe_incompatible
 502 #   define _IO_fwide_maybe_incompatible (0)
 503 #  endif
 504 /* A special optimized version of the function above.  It optimizes the
 505    case of initializing an unoriented byte stream.  */
 506 #  define _IO_fwide(__fp, __mode) \
 507   ({ int __result = (__mode);                                                 \
 508      if (__result < 0 && ! _IO_fwide_maybe_incompatible)                      \
 509        {                                                                      \
 510          if ((__fp)->_mode == 0)                                              \
 511            /* We know that all we have to do is to set the flag.  */          \
 512            (__fp)->_mode = -1;                                                \
 513          __result = (__fp)->_mode;                                            \
 514        }                                                                      \
 515      else if (__builtin_constant_p (__mode) && (__mode) == 0)                 \
 516        __result = _IO_fwide_maybe_incompatible ? -1 : (__fp)->_mode;          \
 517      else                                                                     \
 518        __result = _IO_fwide (__fp, __result);                                 \
 519      __result; })
 520 # endif
 521
 522 extern int _IO_vfwscanf (_IO_FILE * __restrict, const wchar_t * __restrict,
 523                          _IO_va_list, int *__restrict);
 524 extern int _IO_vfwprintf (_IO_FILE *__restrict, const wchar_t *__restrict,
 525                           _IO_va_list);
 526 extern _IO_ssize_t _IO_wpadn (_IO_FILE *, wint_t, _IO_ssize_t);
 527 extern void _IO_free_wbackup_area (_IO_FILE *) __THROW;
 528 #endif
 529
 530 #ifdef __LDBL_COMPAT
 531 # include <bits/libio-ldbl.h>
 532 #endif
 533
 534 #ifdef __cplusplus
 535 }
 536 #endif
 537
 538 #endif /* _IO_STDIO_H */