libio/libio.h

   1 /* Copyright (C) 1991-2015 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, see
  17    <http://www.gnu.org/licenses/>.
  18
  19    As a special exception, if you link the code in this file with
  20    files compiled with a GNU compiler to produce an executable,
  21    that does not cause the resulting executable to be covered by
  22    the GNU Lesser General Public License.  This exception does not
  23    however invalidate any other reasons why the executable file
  24    might be covered by the GNU Lesser General Public License.
  25    This exception applies to code released by its copyright holders
  26    in files containing the exception.  */
  27
  28 #ifndef _IO_STDIO_H
  29 #define _IO_STDIO_H
  30
  31 #include <_G_config.h>
  32 /* ALL of these should be defined in _G_config.h */
  33 #define _IO_fpos_t _G_fpos_t
  34 #define _IO_fpos64_t _G_fpos64_t
  35 #define _IO_size_t size_t
  36 #define _IO_ssize_t __ssize_t
  37 #define _IO_off_t __off_t
  38 #define _IO_off64_t __off64_t
  39 #define _IO_pid_t __pid_t
  40 #define _IO_uid_t __uid_t
  41 #define _IO_iconv_t _G_iconv_t
  42 #define _IO_HAVE_ST_BLKSIZE _G_HAVE_ST_BLKSIZE
  43 #define _IO_BUFSIZ _G_BUFSIZ
  44 #define _IO_va_list _G_va_list
  45 #define _IO_wint_t wint_t
  46
  47 /* This define avoids name pollution if we're using GNU stdarg.h */
  48 #define __need___va_list
  49 #include <stdarg.h>
  50 #ifdef __GNUC_VA_LIST
  51 # undef _IO_va_list
  52 # define _IO_va_list __gnuc_va_list
  53 #endif /* __GNUC_VA_LIST */
  54
  55 #ifndef __P
  56 # include <sys/cdefs.h>
  57 #endif /*!__P*/
  58
  59 #define _IO_UNIFIED_JUMPTABLES 1
  60
  61 #ifndef EOF
  62 # define EOF (-1)
  63 #endif
  64 #ifndef NULL
  65 # if defined __GNUG__ && \
  66     (__GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 8))
  67 #  define NULL (__null)
  68 # else
  69 #  if !defined(__cplusplus)
  70 #   define NULL ((void*)0)
  71 #  else
  72 #   define NULL (0)
  73 #  endif
  74 # endif
  75 #endif
  76
  77 #define _IOS_INPUT      1
  78 #define _IOS_OUTPUT     2
  79 #define _IOS_ATEND      4
  80 #define _IOS_APPEND     8
  81 #define _IOS_TRUNC      16
  82 #define _IOS_NOCREATE   32
  83 #define _IOS_NOREPLACE  64
  84 #define _IOS_BIN        128
  85
  86 /* Magic numbers and bits for the _flags field.
  87    The magic numbers use the high-order bits of _flags;
  88    the remaining bits are available for variable flags.
  89    Note: The magic numbers must all be negative if stdio
  90    emulation is desired. */
  91
  92 #define _IO_MAGIC 0xFBAD0000 /* Magic number */
  93 #define _OLD_STDIO_MAGIC 0xFABC0000 /* Emulate old stdio. */
  94 #define _IO_MAGIC_MASK 0xFFFF0000
  95 #define _IO_USER_BUF 1 /* User owns buffer; don't delete it on close. */
  96 #define _IO_UNBUFFERED 2
  97 #define _IO_NO_READS 4 /* Reading not allowed */
  98 #define _IO_NO_WRITES 8 /* Writing not allowd */
  99 #define _IO_EOF_SEEN 0x10
 100 #define _IO_ERR_SEEN 0x20
 101 #define _IO_DELETE_DONT_CLOSE 0x40 /* Don't call close(_fileno) on cleanup. */
 102 #define _IO_LINKED 0x80 /* Set if linked (using _chain) to streambuf::_list_all.*/
 103 #define _IO_IN_BACKUP 0x100
 104 #define _IO_LINE_BUF 0x200
 105 #define _IO_TIED_PUT_GET 0x400 /* Set if put and get pointer logicly tied. */
 106 #define _IO_CURRENTLY_PUTTING 0x800
 107 #define _IO_IS_APPENDING 0x1000
 108 #define _IO_IS_FILEBUF 0x2000
 109 #define _IO_BAD_SEEN 0x4000
 110 #define _IO_USER_LOCK 0x8000
 111
 112 #define _IO_FLAGS2_MMAP 1
 113 #define _IO_FLAGS2_NOTCANCEL 2
 114 #ifdef _LIBC
 115 # define _IO_FLAGS2_FORTIFY 4
 116 #endif
 117 #define _IO_FLAGS2_USER_WBUF 8
 118 #ifdef _LIBC
 119 # define _IO_FLAGS2_SCANF_STD 16
 120 # define _IO_FLAGS2_NOCLOSE 32
 121 # define _IO_FLAGS2_CLOEXEC 64
 122 #endif
 123
 124 /* These are "formatting flags" matching the iostream fmtflags enum values. */
 125 #define _IO_SKIPWS 01
 126 #define _IO_LEFT 02
 127 #define _IO_RIGHT 04
 128 #define _IO_INTERNAL 010
 129 #define _IO_DEC 020
 130 #define _IO_OCT 040
 131 #define _IO_HEX 0100
 132 #define _IO_SHOWBASE 0200
 133 #define _IO_SHOWPOINT 0400
 134 #define _IO_UPPERCASE 01000
 135 #define _IO_SHOWPOS 02000
 136 #define _IO_SCIENTIFIC 04000
 137 #define _IO_FIXED 010000
 138 #define _IO_UNITBUF 020000
 139 #define _IO_STDIO 040000
 140 #define _IO_DONT_CLOSE 0100000
 141 #define _IO_BOOLALPHA 0200000
 142
 143
 144 struct _IO_jump_t;  struct _IO_FILE;
 145
 146 /* Handle lock.  */
 147 #ifdef _IO_MTSAFE_IO
 148 # if defined __GLIBC__ && __GLIBC__ >= 2
 149 #  include <bits/stdio-lock.h>
 150 # else
 151 /*# include <comthread.h>*/
 152 # endif
 153 #else
 154 typedef void _IO_lock_t;
 155 #endif
 156
 157
 158 /* A streammarker remembers a position in a buffer. */
 159
 160 struct _IO_marker {
 161   struct _IO_marker *_next;
 162   struct _IO_FILE *_sbuf;
 163   /* If _pos >= 0
 164  it points to _buf->Gbase()+_pos. FIXME comment */
 165   /* if _pos < 0, it points to _buf->eBptr()+_pos. FIXME comment */
 166   int _pos;
 167 #if 0
 168     void set_streampos(streampos sp) { _spos = sp; }
 169     void set_offset(int offset) { _pos = offset; _spos = (streampos)(-2); }
 170   public:
 171     streammarker(streambuf *sb);
 172     ~streammarker();
 173     int saving() { return  _spos == -2; }
 174     int delta(streammarker&);
 175     int delta();
 176 #endif
 177 };
 178
 179 /* This is the structure from the libstdc++ codecvt class.  */
 180 enum __codecvt_result
 181 {
 182   __codecvt_ok,
 183   __codecvt_partial,
 184   __codecvt_error,
 185   __codecvt_noconv
 186 };
 187
 188 #if defined _LIBC || defined _GLIBCPP_USE_WCHAR_T
 189 /* The order of the elements in the following struct must match the order
 190    of the virtual functions in the libstdc++ codecvt class.  */
 191 struct _IO_codecvt
 192 {
 193   void (*__codecvt_destr) (struct _IO_codecvt *);
 194   enum __codecvt_result (*__codecvt_do_out) (struct _IO_codecvt *,
 195                                              __mbstate_t *,
 196                                              const wchar_t *,
 197                                              const wchar_t *,
 198                                              const wchar_t **, char *,
 199                                              char *, char **);
 200   enum __codecvt_result (*__codecvt_do_unshift) (struct _IO_codecvt *,
 201                                                  __mbstate_t *, char *,
 202                                                  char *, char **);
 203   enum __codecvt_result (*__codecvt_do_in) (struct _IO_codecvt *,
 204                                             __mbstate_t *,
 205                                             const char *, const char *,
 206                                             const char **, wchar_t *,
 207                                             wchar_t *, wchar_t **);
 208   int (*__codecvt_do_encoding) (struct _IO_codecvt *);
 209   int (*__codecvt_do_always_noconv) (struct _IO_codecvt *);
 210   int (*__codecvt_do_length) (struct _IO_codecvt *, __mbstate_t *,
 211                               const char *, const char *, _IO_size_t);
 212   int (*__codecvt_do_max_length) (struct _IO_codecvt *);
 213
 214   _IO_iconv_t __cd_in;
 215   _IO_iconv_t __cd_out;
 216 };
 217
 218 /* Extra data for wide character streams.  */
 219 struct _IO_wide_data
 220 {
 221   wchar_t *_IO_read_ptr;        /* Current read pointer */
 222   wchar_t *_IO_read_end;        /* End of get area. */
 223   wchar_t *_IO_read_base;       /* Start of putback+get area. */
 224   wchar_t *_IO_write_base;      /* Start of put area. */
 225   wchar_t *_IO_write_ptr;       /* Current put pointer. */
 226   wchar_t *_IO_write_end;       /* End of put area. */
 227   wchar_t *_IO_buf_base;        /* Start of reserve area. */
 228   wchar_t *_IO_buf_end;         /* End of reserve area. */
 229   /* The following fields are used to support backing up and undo. */
 230   wchar_t *_IO_save_base;       /* Pointer to start of non-current get area. */
 231   wchar_t *_IO_backup_base;     /* Pointer to first valid character of
 232                                    backup area */
 233   wchar_t *_IO_save_end;        /* Pointer to end of non-current get area. */
 234
 235   __mbstate_t _IO_state;
 236   __mbstate_t _IO_last_state;
 237   struct _IO_codecvt _codecvt;
 238
 239   wchar_t _shortbuf[1];
 240
 241   const struct _IO_jump_t *_wide_vtable;
 242 };
 243 #endif
 244
 245 struct _IO_FILE {
 246   int _flags;           /* High-order word is _IO_MAGIC; rest is flags. */
 247 #define _IO_file_flags _flags
 248
 249   /* The following pointers correspond to the C++ streambuf protocol. */
 250   /* Note:  Tk uses the _IO_read_ptr and _IO_read_end fields directly. */
 251   char* _IO_read_ptr;   /* Current read pointer */
 252   char* _IO_read_end;   /* End of get area. */
 253   char* _IO_read_base;  /* Start of putback+get area. */
 254   char* _IO_write_base; /* Start of put area. */
 255   char* _IO_write_ptr;  /* Current put pointer. */
 256   char* _IO_write_end;  /* End of put area. */
 257   char* _IO_buf_base;   /* Start of reserve area. */
 258   char* _IO_buf_end;    /* End of reserve area. */
 259   /* The following fields are used to support backing up and undo. */
 260   char *_IO_save_base; /* Pointer to start of non-current get area. */
 261   char *_IO_backup_base;  /* Pointer to first valid character of backup area */
 262   char *_IO_save_end; /* Pointer to end of non-current get area. */
 263
 264   struct _IO_marker *_markers;
 265
 266   struct _IO_FILE *_chain;
 267
 268   int _fileno;
 269 #if 0
 270   int _blksize;
 271 #else
 272   int _flags2;
 273 #endif
 274   _IO_off_t _old_offset; /* This used to be _offset but it's too small.  */
 275
 276 #define __HAVE_COLUMN /* temporary */
 277   /* 1+column number of pbase(); 0 is unknown. */
 278   unsigned short _cur_column;
 279   signed char _vtable_offset;
 280   char _shortbuf[1];
 281
 282   /*  char* _save_gptr;  char* _save_egptr; */
 283
 284   _IO_lock_t *_lock;
 285 #ifdef _IO_USE_OLD_IO_FILE
 286 };
 287
 288 struct _IO_FILE_complete
 289 {
 290   struct _IO_FILE _file;
 291 #endif
 292 #if defined _G_IO_IO_FILE_VERSION && _G_IO_IO_FILE_VERSION == 0x20001
 293   _IO_off64_t _offset;
 294 # if defined _LIBC || defined _GLIBCPP_USE_WCHAR_T
 295   /* Wide character stream stuff.  */
 296   struct _IO_codecvt *_codecvt;
 297   struct _IO_wide_data *_wide_data;
 298   struct _IO_FILE *_freeres_list;
 299   void *_freeres_buf;
 300   size_t _freeres_size;
 301 # else
 302   void *__pad1;
 303   void *__pad2;
 304   void *__pad3;
 305   void *__pad4;
 306   size_t __pad5;
 307 # endif
 308   int _mode;
 309   /* Make sure we don't get into trouble again.  */
 310   char _unused2[15 * sizeof (int) - 4 * sizeof (void *) - sizeof (size_t)];
 311 #endif
 312 };
 313
 314 #ifndef __cplusplus
 315 typedef struct _IO_FILE _IO_FILE;
 316 #endif
 317
 318 struct _IO_FILE_plus;
 319
 320 extern struct _IO_FILE_plus _IO_2_1_stdin_;
 321 extern struct _IO_FILE_plus _IO_2_1_stdout_;
 322 extern struct _IO_FILE_plus _IO_2_1_stderr_;
 323 #ifndef _LIBC
 324 #define _IO_stdin ((_IO_FILE*)(&_IO_2_1_stdin_))
 325 #define _IO_stdout ((_IO_FILE*)(&_IO_2_1_stdout_))
 326 #define _IO_stderr ((_IO_FILE*)(&_IO_2_1_stderr_))
 327 #else
 328 extern _IO_FILE *_IO_stdin attribute_hidden;
 329 extern _IO_FILE *_IO_stdout attribute_hidden;
 330 extern _IO_FILE *_IO_stderr attribute_hidden;
 331 #endif
 332
 333
 334 /* Functions to do I/O and file management for a stream.  */
 335
 336 /* Read NBYTES bytes from COOKIE into a buffer pointed to by BUF.
 337    Return number of bytes read.  */
 338 typedef __ssize_t __io_read_fn (void *__cookie, char *__buf, size_t __nbytes);
 339
 340 /* Write N bytes pointed to by BUF to COOKIE.  Write all N bytes
 341    unless there is an error.  Return number of bytes written.  If
 342    there is an error, return 0 and do not write anything.  If the file
 343    has been opened for append (__mode.__append set), then set the file
 344    pointer to the end of the file and then do the write; if not, just
 345    write at the current file pointer.  */
 346 typedef __ssize_t __io_write_fn (void *__cookie, const char *__buf,
 347                                  size_t __n);
 348
 349 /* Move COOKIE's file position to *POS bytes from the
 350    beginning of the file (if W is SEEK_SET),
 351    the current position (if W is SEEK_CUR),
 352    or the end of the file (if W is SEEK_END).
 353    Set *POS to the new file position.
 354    Returns zero if successful, nonzero if not.  */
 355 typedef int __io_seek_fn (void *__cookie, _IO_off64_t *__pos, int __w);
 356
 357 /* Close COOKIE.  */
 358 typedef int __io_close_fn (void *__cookie);
 359
 360
 361 #ifdef _GNU_SOURCE
 362 /* User-visible names for the above.  */
 363 typedef __io_read_fn cookie_read_function_t;
 364 typedef __io_write_fn cookie_write_function_t;
 365 typedef __io_seek_fn cookie_seek_function_t;
 366 typedef __io_close_fn cookie_close_function_t;
 367
 368 /* The structure with the cookie function pointers.  */
 369 typedef struct
 370 {
 371   __io_read_fn *read;           /* Read bytes.  */
 372   __io_write_fn *write;         /* Write bytes.  */
 373   __io_seek_fn *seek;           /* Seek/tell file position.  */
 374   __io_close_fn *close;         /* Close file.  */
 375 } _IO_cookie_io_functions_t;
 376 typedef _IO_cookie_io_functions_t cookie_io_functions_t;
 377
 378 struct _IO_cookie_file;
 379
 380 /* Initialize one of those.  */
 381 extern void _IO_cookie_init (struct _IO_cookie_file *__cfile, int __read_write,
 382                              void *__cookie, _IO_cookie_io_functions_t __fns);
 383 #endif
 384
 385
 386 #ifdef __cplusplus
 387 extern "C" {
 388 #endif
 389
 390 extern int __underflow (_IO_FILE *);
 391 extern int __uflow (_IO_FILE *);
 392 extern int __overflow (_IO_FILE *, int);
 393 #if defined _LIBC || defined _GLIBCPP_USE_WCHAR_T
 394 extern _IO_wint_t __wunderflow (_IO_FILE *);
 395 extern _IO_wint_t __wuflow (_IO_FILE *);
 396 extern _IO_wint_t __woverflow (_IO_FILE *, _IO_wint_t);
 397 #endif
 398
 399 #if  __GNUC__ >= 3
 400 # define _IO_BE(expr, res) __builtin_expect ((expr), res)
 401 #else
 402 # define _IO_BE(expr, res) (expr)
 403 #endif
 404
 405 #define _IO_getc_unlocked(_fp) \
 406        (_IO_BE ((_fp)->_IO_read_ptr >= (_fp)->_IO_read_end, 0) \
 407         ? __uflow (_fp) : *(unsigned char *) (_fp)->_IO_read_ptr++)
 408 #define _IO_peekc_unlocked(_fp) \
 409        (_IO_BE ((_fp)->_IO_read_ptr >= (_fp)->_IO_read_end, 0) \
 410           && __underflow (_fp) == EOF ? EOF \
 411         : *(unsigned char *) (_fp)->_IO_read_ptr)
 412 #define _IO_putc_unlocked(_ch, _fp) \
 413    (_IO_BE ((_fp)->_IO_write_ptr >= (_fp)->_IO_write_end, 0) \
 414     ? __overflow (_fp, (unsigned char) (_ch)) \
 415     : (unsigned char) (*(_fp)->_IO_write_ptr++ = (_ch)))
 416
 417 #if defined _LIBC || defined _GLIBCPP_USE_WCHAR_T
 418 # define _IO_getwc_unlocked(_fp) \
 419   (_IO_BE ((_fp)->_wide_data == NULL                                    \
 420            || ((_fp)->_wide_data->_IO_read_ptr                          \
 421                >= (_fp)->_wide_data->_IO_read_end), 0)                  \
 422    ? __wuflow (_fp) : (_IO_wint_t) *(_fp)->_wide_data->_IO_read_ptr++)
 423 # define _IO_putwc_unlocked(_wch, _fp) \
 424   (_IO_BE ((_fp)->_wide_data == NULL                                    \
 425            || ((_fp)->_wide_data->_IO_write_ptr                         \
 426                >= (_fp)->_wide_data->_IO_write_end), 0)                 \
 427    ? __woverflow (_fp, _wch)                                            \
 428    : (_IO_wint_t) (*(_fp)->_wide_data->_IO_write_ptr++ = (_wch)))
 429 #endif
 430
 431 #define _IO_feof_unlocked(__fp) (((__fp)->_flags & _IO_EOF_SEEN) != 0)
 432 #define _IO_ferror_unlocked(__fp) (((__fp)->_flags & _IO_ERR_SEEN) != 0)
 433
 434 extern int _IO_getc (_IO_FILE *__fp);
 435 extern int _IO_putc (int __c, _IO_FILE *__fp);
 436 extern int _IO_feof (_IO_FILE *__fp) __THROW;
 437 extern int _IO_ferror (_IO_FILE *__fp) __THROW;
 438
 439 extern int _IO_peekc_locked (_IO_FILE *__fp);
 440
 441 /* This one is for Emacs. */
 442 #define _IO_PENDING_OUTPUT_COUNT(_fp)   \
 443         ((_fp)->_IO_write_ptr - (_fp)->_IO_write_base)
 444
 445 extern void _IO_flockfile (_IO_FILE *) __THROW;
 446 extern void _IO_funlockfile (_IO_FILE *) __THROW;
 447 extern int _IO_ftrylockfile (_IO_FILE *) __THROW;
 448
 449 #ifdef _IO_MTSAFE_IO
 450 # define _IO_peekc(_fp) _IO_peekc_locked (_fp)
 451 # define _IO_flockfile(_fp) \
 452   if (((_fp)->_flags & _IO_USER_LOCK) == 0) _IO_flockfile (_fp)
 453 # define _IO_funlockfile(_fp) \
 454   if (((_fp)->_flags & _IO_USER_LOCK) == 0) _IO_funlockfile (_fp)
 455 #else
 456 # define _IO_peekc(_fp) _IO_peekc_unlocked (_fp)
 457 # define _IO_flockfile(_fp) /**/
 458 # define _IO_funlockfile(_fp) /**/
 459 # define _IO_ftrylockfile(_fp) /**/
 460 # define _IO_cleanup_region_start(_fct, _fp) /**/
 461 # define _IO_cleanup_region_end(_Doit) /**/
 462 #endif /* !_IO_MTSAFE_IO */
 463
 464 extern int _IO_vfscanf (_IO_FILE * __restrict, const char * __restrict,
 465                         _IO_va_list, int *__restrict);
 466 extern int _IO_vfprintf (_IO_FILE *__restrict, const char *__restrict,
 467                          _IO_va_list);
 468 extern _IO_ssize_t _IO_padn (_IO_FILE *, int, _IO_ssize_t);
 469 extern _IO_size_t _IO_sgetn (_IO_FILE *, void *, _IO_size_t);
 470
 471 extern _IO_off64_t _IO_seekoff (_IO_FILE *, _IO_off64_t, int, int);
 472 extern _IO_off64_t _IO_seekpos (_IO_FILE *, _IO_off64_t, int);
 473
 474 extern void _IO_free_backup_area (_IO_FILE *) __THROW;
 475
 476 #if defined _LIBC || defined _GLIBCPP_USE_WCHAR_T
 477 extern _IO_wint_t _IO_getwc (_IO_FILE *__fp);
 478 extern _IO_wint_t _IO_putwc (wchar_t __wc, _IO_FILE *__fp);
 479 extern int _IO_fwide (_IO_FILE *__fp, int __mode) __THROW;
 480 # if __GNUC__ >= 2
 481 /* While compiling glibc we have to handle compatibility with very old
 482    versions.  */
 483 #  if defined _LIBC && defined SHARED
 484 #   include <shlib-compat.h>
 485 #   if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_1)
 486 #    define _IO_fwide_maybe_incompatible \
 487   (__builtin_expect (&_IO_stdin_used == NULL, 0))
 488 extern const int _IO_stdin_used;
 489 weak_extern (_IO_stdin_used);
 490 #   endif
 491 #  endif
 492 #  ifndef _IO_fwide_maybe_incompatible
 493 #   define _IO_fwide_maybe_incompatible (0)
 494 #  endif
 495 /* A special optimized version of the function above.  It optimizes the
 496    case of initializing an unoriented byte stream.  */
 497 #  define _IO_fwide(__fp, __mode) \
 498   ({ int __result = (__mode);                                                 \
 499      if (__result < 0 && ! _IO_fwide_maybe_incompatible)                      \
 500        {                                                                      \
 501          if ((__fp)->_mode == 0)                                              \
 502            /* We know that all we have to do is to set the flag.  */          \
 503            (__fp)->_mode = -1;                                                \
 504          __result = (__fp)->_mode;                                            \
 505        }                                                                      \
 506      else if (__builtin_constant_p (__mode) && (__mode) == 0)                 \
 507        __result = _IO_fwide_maybe_incompatible ? -1 : (__fp)->_mode;          \
 508      else                                                                     \
 509        __result = _IO_fwide (__fp, __result);                                 \
 510      __result; })
 511 # endif
 512
 513 extern int _IO_vfwscanf (_IO_FILE * __restrict, const wchar_t * __restrict,
 514                          _IO_va_list, int *__restrict);
 515 extern int _IO_vfwprintf (_IO_FILE *__restrict, const wchar_t *__restrict,
 516                           _IO_va_list);
 517 extern _IO_ssize_t _IO_wpadn (_IO_FILE *, wint_t, _IO_ssize_t);
 518 extern void _IO_free_wbackup_area (_IO_FILE *) __THROW;
 519 #endif
 520
 521 #ifdef __LDBL_COMPAT
 522 # include <bits/libio-ldbl.h>
 523 #endif
 524
 525 #ifdef __cplusplus
 526 }
 527 #endif
 528
 529 #endif /* _IO_STDIO_H */