include/stdio.h

   1 /*
   2  * Copyright (c) 2000, 2005, 2007, 2009, 2010 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23 /*-
  24  * Copyright (c) 1990, 1993
  25  *      The Regents of the University of California.  All rights reserved.
  26  *
  27  * This code is derived from software contributed to Berkeley by
  28  * Chris Torek.
  29  *
  30  * Redistribution and use in source and binary forms, with or without
  31  * modification, are permitted provided that the following conditions
  32  * are met:
  33  * 1. Redistributions of source code must retain the above copyright
  34  *    notice, this list of conditions and the following disclaimer.
  35  * 2. Redistributions in binary form must reproduce the above copyright
  36  *    notice, this list of conditions and the following disclaimer in the
  37  *    documentation and/or other materials provided with the distribution.
  38  * 3. All advertising materials mentioning features or use of this software
  39  *    must display the following acknowledgement:
  40  *      This product includes software developed by the University of
  41  *      California, Berkeley and its contributors.
  42  * 4. Neither the name of the University nor the names of its contributors
  43  *    may be used to endorse or promote products derived from this software
  44  *    without specific prior written permission.
  45  *
  46  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  47  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  48  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  49  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  50  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  51  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  52  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  53  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  54  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  55  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  56  * SUCH DAMAGE.
  57  *
  58  *      @(#)stdio.h     8.5 (Berkeley) 4/29/95
  59  */
  60
  61 #ifndef _STDIO_H_
  62 #define _STDIO_H_
  63
  64 #include <sys/cdefs.h>
  65 #include <Availability.h>
  66
  67 #include <_types.h>
  68
  69 #ifndef _VA_LIST
  70 #define _VA_LIST
  71 /* DO NOT REMOVE THIS COMMENT: fixincludes needs to see:
  72  * __gnuc_va_list and include <stdarg.h> */
  73 typedef __darwin_va_list        va_list;
  74 #endif
  75
  76 #ifndef _SIZE_T
  77 #define _SIZE_T
  78 typedef __darwin_size_t         size_t;
  79 #endif
  80
  81 #ifndef NULL
  82 #define NULL __DARWIN_NULL
  83 #endif /* ! NULL */
  84
  85 typedef __darwin_off_t          fpos_t;
  86
  87 #define _FSTDIO                 /* Define for new stdio with functions. */
  88
  89 /*
  90  * NB: to fit things in six character monocase externals, the stdio
  91  * code uses the prefix `__s' for stdio objects, typically followed
  92  * by a three-character attempt at a mnemonic.
  93  */
  94
  95 /* stdio buffers */
  96 struct __sbuf {
  97         unsigned char   *_base;
  98         int             _size;
  99 };
 100
 101 /* hold a buncha junk that would grow the ABI */
 102 struct __sFILEX;
 103
 104 /*
 105  * stdio state variables.
 106  *
 107  * The following always hold:
 108  *
 109  *      if (_flags&(__SLBF|__SWR)) == (__SLBF|__SWR),
 110  *              _lbfsize is -_bf._size, else _lbfsize is 0
 111  *      if _flags&__SRD, _w is 0
 112  *      if _flags&__SWR, _r is 0
 113  *
 114  * This ensures that the getc and putc macros (or inline functions) never
 115  * try to write or read from a file that is in `read' or `write' mode.
 116  * (Moreover, they can, and do, automatically switch from read mode to
 117  * write mode, and back, on "r+" and "w+" files.)
 118  *
 119  * _lbfsize is used only to make the inline line-buffered output stream
 120  * code as compact as possible.
 121  *
 122  * _ub, _up, and _ur are used when ungetc() pushes back more characters
 123  * than fit in the current _bf, or when ungetc() pushes back a character
 124  * that does not match the previous one in _bf.  When this happens,
 125  * _ub._base becomes non-nil (i.e., a stream has ungetc() data iff
 126  * _ub._base!=NULL) and _up and _ur save the current values of _p and _r.
 127  *
 128  * NB: see WARNING above before changing the layout of this structure!
 129  */
 130 typedef struct __sFILE {
 131         unsigned char *_p;      /* current position in (some) buffer */
 132         int     _r;             /* read space left for getc() */
 133         int     _w;             /* write space left for putc() */
 134         short   _flags;         /* flags, below; this FILE is free if 0 */
 135         short   _file;          /* fileno, if Unix descriptor, else -1 */
 136         struct  __sbuf _bf;     /* the buffer (at least 1 byte, if !NULL) */
 137         int     _lbfsize;       /* 0 or -_bf._size, for inline putc */
 138
 139         /* operations */
 140         void    *_cookie;       /* cookie passed to io functions */
 141         int     (*_close)(void *);
 142         int     (*_read) (void *, char *, int);
 143         fpos_t  (*_seek) (void *, fpos_t, int);
 144         int     (*_write)(void *, const char *, int);
 145
 146         /* separate buffer for long sequences of ungetc() */
 147         struct  __sbuf _ub;     /* ungetc buffer */
 148         struct __sFILEX *_extra; /* additions to FILE to not break ABI */
 149         int     _ur;            /* saved _r when _r is counting ungetc data */
 150
 151         /* tricks to meet minimum requirements even when malloc() fails */
 152         unsigned char _ubuf[3]; /* guarantee an ungetc() buffer */
 153         unsigned char _nbuf[1]; /* guarantee a getc() buffer */
 154
 155         /* separate buffer for fgetln() when line crosses buffer boundary */
 156         struct  __sbuf _lb;     /* buffer for fgetln() */
 157
 158         /* Unix stdio files get aligned to block boundaries on fseek() */
 159         int     _blksize;       /* stat.st_blksize (may be != _bf._size) */
 160         fpos_t  _offset;        /* current lseek offset (see WARNING) */
 161 } FILE;
 162
 163 __BEGIN_DECLS
 164 extern FILE *__stdinp;
 165 extern FILE *__stdoutp;
 166 extern FILE *__stderrp;
 167 __END_DECLS
 168
 169 #define __SLBF  0x0001          /* line buffered */
 170 #define __SNBF  0x0002          /* unbuffered */
 171 #define __SRD   0x0004          /* OK to read */
 172 #define __SWR   0x0008          /* OK to write */
 173         /* RD and WR are never simultaneously asserted */
 174 #define __SRW   0x0010          /* open for reading & writing */
 175 #define __SEOF  0x0020          /* found EOF */
 176 #define __SERR  0x0040          /* found error */
 177 #define __SMBF  0x0080          /* _buf is from malloc */
 178 #define __SAPP  0x0100          /* fdopen()ed in append mode */
 179 #define __SSTR  0x0200          /* this is an sprintf/snprintf string */
 180 #define __SOPT  0x0400          /* do fseek() optimisation */
 181 #define __SNPT  0x0800          /* do not do fseek() optimisation */
 182 #define __SOFF  0x1000          /* set iff _offset is in fact correct */
 183 #define __SMOD  0x2000          /* true => fgetln modified _p text */
 184 #define __SALC  0x4000          /* allocate string space dynamically */
 185 #define __SIGN  0x8000          /* ignore this file in _fwalk */
 186
 187 /*
 188  * The following three definitions are for ANSI C, which took them
 189  * from System V, which brilliantly took internal interface macros and
 190  * made them official arguments to setvbuf(), without renaming them.
 191  * Hence, these ugly _IOxxx names are *supposed* to appear in user code.
 192  *
 193  * Although numbered as their counterparts above, the implementation
 194  * does not rely on this.
 195  */
 196 #define _IOFBF  0               /* setvbuf should set fully buffered */
 197 #define _IOLBF  1               /* setvbuf should set line buffered */
 198 #define _IONBF  2               /* setvbuf should set unbuffered */
 199
 200 #define BUFSIZ  1024            /* size of buffer used by setbuf */
 201 #define EOF     (-1)
 202
 203                                 /* must be == _POSIX_STREAM_MAX <limits.h> */
 204 #define FOPEN_MAX       20      /* must be <= OPEN_MAX <sys/syslimits.h> */
 205 #define FILENAME_MAX    1024    /* must be <= PATH_MAX <sys/syslimits.h> */
 206
 207 /* System V/ANSI C; this is the wrong way to do this, do *not* use these. */
 208 #ifndef _ANSI_SOURCE
 209 #define P_tmpdir        "/var/tmp/"
 210 #endif
 211 #define L_tmpnam        1024    /* XXX must be == PATH_MAX */
 212 #define TMP_MAX         308915776
 213
 214 #ifndef SEEK_SET
 215 #define SEEK_SET        0       /* set file offset to offset */
 216 #endif
 217 #ifndef SEEK_CUR
 218 #define SEEK_CUR        1       /* set file offset to current plus offset */
 219 #endif
 220 #ifndef SEEK_END
 221 #define SEEK_END        2       /* set file offset to EOF plus offset */
 222 #endif
 223
 224 #define stdin   __stdinp
 225 #define stdout  __stdoutp
 226 #define stderr  __stderrp
 227
 228 #ifdef _DARWIN_UNLIMITED_STREAMS
 229 #if defined(__IPHONE_OS_VERSION_MIN_REQUIRED) && __IPHONE_OS_VERSION_MIN_REQUIRED < __IPHONE_3_2
 230 #error "_DARWIN_UNLIMITED_STREAMS specified, but -miphoneos-version-min version does not support it."
 231 #elif defined(__MAC_OS_X_VERSION_MIN_REQUIRED) && __MAC_OS_X_VERSION_MIN_REQUIRED < __MAC_10_6
 232 #error "_DARWIN_UNLIMITED_STREAMS specified, but -mmacosx-version-min version does not support it."
 233 #endif
 234 #endif
 235
 236 /* ANSI-C */
 237
 238 __BEGIN_DECLS
 239 void     clearerr(FILE *);
 240 int      fclose(FILE *);
 241 int      feof(FILE *);
 242 int      ferror(FILE *);
 243 int      fflush(FILE *);
 244 int      fgetc(FILE *);
 245 int      fgetpos(FILE * __restrict, fpos_t *);
 246 char    *fgets(char * __restrict, int, FILE *);
 247 #if defined(_DARWIN_UNLIMITED_STREAMS) || defined(_DARWIN_C_SOURCE)
 248 FILE    *fopen(const char * __restrict, const char * __restrict) __DARWIN_ALIAS_STARTING(__MAC_10_6, __IPHONE_3_2, __DARWIN_EXTSN(fopen));
 249 #else /* !_DARWIN_UNLIMITED_STREAMS && !_DARWIN_C_SOURCE */
 250 //Begin-Libc
 251 #ifndef LIBC_ALIAS_FOPEN
 252 //End-Libc
 253 FILE    *fopen(const char * __restrict, const char * __restrict) __DARWIN_ALIAS_STARTING(__MAC_10_6, __IPHONE_2_0, __DARWIN_ALIAS(fopen));
 254 //Begin-Libc
 255 #else /* LIBC_ALIAS_FOPEN */
 256 FILE    *fopen(const char * __restrict, const char * __restrict) LIBC_ALIAS(fopen);
 257 #endif /* !LIBC_ALIAS_FOPEN */
 258 //End-Libc
 259 #endif /* (DARWIN_UNLIMITED_STREAMS || _DARWIN_C_SOURCE) */
 260 int      fprintf(FILE * __restrict, const char * __restrict, ...) __DARWIN_LDBL_COMPAT(fprintf) __printflike(2, 3);
 261 int      fputc(int, FILE *);
 262 //Begin-Libc
 263 #ifndef LIBC_ALIAS_FPUTS
 264 //End-Libc
 265 int      fputs(const char * __restrict, FILE * __restrict) __DARWIN_ALIAS(fputs);
 266 //Begin-Libc
 267 #else /* LIBC_ALIAS_FPUTS */
 268 int      fputs(const char * __restrict, FILE * __restrict) LIBC_ALIAS(fputs);
 269 #endif /* !LIBC_ALIAS_FPUTS */
 270 //End-Libc
 271 size_t   fread(void * __restrict, size_t, size_t, FILE * __restrict);
 272 //Begin-Libc
 273 #ifndef LIBC_ALIAS_FREOPEN
 274 //End-Libc
 275 FILE    *freopen(const char * __restrict, const char * __restrict,
 276                  FILE * __restrict) __DARWIN_ALIAS(freopen);
 277 //Begin-Libc
 278 #else /* LIBC_ALIAS_FREOPEN */
 279 FILE    *freopen(const char * __restrict, const char * __restrict,
 280                  FILE * __restrict) LIBC_ALIAS(freopen);
 281 #endif /* !LIBC_ALIAS_FREOPEN */
 282 //End-Libc
 283 int      fscanf(FILE * __restrict, const char * __restrict, ...) __DARWIN_LDBL_COMPAT(fscanf) __scanflike(2, 3);
 284 int      fseek(FILE *, long, int);
 285 int      fsetpos(FILE *, const fpos_t *);
 286 long     ftell(FILE *);
 287 //Begin-Libc
 288 #ifndef LIBC_ALIAS_FWRITE
 289 //End-Libc
 290 size_t   fwrite(const void * __restrict, size_t, size_t, FILE * __restrict) __DARWIN_ALIAS(fwrite);
 291 //Begin-Libc
 292 #else /* LIBC_ALIAS_FWRITE */
 293 size_t   fwrite(const void * __restrict, size_t, size_t, FILE * __restrict) LIBC_ALIAS(fwrite);
 294 #endif /* !LIBC_ALIAS_FWRITE */
 295 //End-Libc
 296 int      getc(FILE *);
 297 int      getchar(void);
 298 char    *gets(char *);
 299 void     perror(const char *);
 300 int      printf(const char * __restrict, ...) __DARWIN_LDBL_COMPAT(printf) __printflike(1, 2);
 301 int      putc(int, FILE *);
 302 int      putchar(int);
 303 int      puts(const char *);
 304 int      remove(const char *);
 305 int      rename (const char *, const char *);
 306 void     rewind(FILE *);
 307 int      scanf(const char * __restrict, ...) __DARWIN_LDBL_COMPAT(scanf) __scanflike(1, 2);
 308 void     setbuf(FILE * __restrict, char * __restrict);
 309 int      setvbuf(FILE * __restrict, char * __restrict, int, size_t);
 310 int      sprintf(char * __restrict, const char * __restrict, ...) __DARWIN_LDBL_COMPAT(sprintf) __printflike(2, 3);
 311 int      sscanf(const char * __restrict, const char * __restrict, ...) __DARWIN_LDBL_COMPAT(sscanf) __scanflike(2, 3);
 312 FILE    *tmpfile(void);
 313 char    *tmpnam(char *);
 314 int      ungetc(int, FILE *);
 315 int      vfprintf(FILE * __restrict, const char * __restrict, va_list) __DARWIN_LDBL_COMPAT(vfprintf) __printflike(2, 0);
 316 int      vprintf(const char * __restrict, va_list) __DARWIN_LDBL_COMPAT(vprintf) __printflike(1, 0);
 317 int      vsprintf(char * __restrict, const char * __restrict, va_list) __DARWIN_LDBL_COMPAT(vsprintf) __printflike(2, 0);
 318 __END_DECLS
 319
 320
 321
 322 /* Additional functionality provided by:
 323  * POSIX.1-1988
 324  */
 325
 326 #if __DARWIN_C_LEVEL >= 198808L
 327 #define L_ctermid       1024    /* size for ctermid(); PATH_MAX */
 328
 329 __BEGIN_DECLS
 330 #ifndef __CTERMID_DEFINED
 331 /* Multiply defined in stdio.h and unistd.h by SUS */
 332 #define __CTERMID_DEFINED 1
 333 char    *ctermid(char *);
 334 #endif
 335
 336 #if defined(_DARWIN_UNLIMITED_STREAMS) || defined(_DARWIN_C_SOURCE)
 337 FILE    *fdopen(int, const char *) __DARWIN_ALIAS_STARTING(__MAC_10_6, __IPHONE_3_2, __DARWIN_EXTSN(fdopen));
 338 #else /* !_DARWIN_UNLIMITED_STREAMS && !_DARWIN_C_SOURCE */
 339 //Begin-Libc
 340 #ifndef LIBC_ALIAS_FDOPEN
 341 //End-Libc
 342 FILE    *fdopen(int, const char *) __DARWIN_ALIAS_STARTING(__MAC_10_6, __IPHONE_2_0, __DARWIN_ALIAS(fdopen));
 343 //Begin-Libc
 344 #else /* LIBC_ALIAS_FDOPEN */
 345 FILE    *fdopen(int, const char *) LIBC_ALIAS(fdopen);
 346 #endif /* !LIBC_ALIAS_FDOPEN */
 347 //End-Libc
 348 #endif /* (DARWIN_UNLIMITED_STREAMS || _DARWIN_C_SOURCE) */
 349 int      fileno(FILE *);
 350 __END_DECLS
 351 #endif /* __DARWIN_C_LEVEL >= 198808L */
 352
 353
 354 /* Additional functionality provided by:
 355  * POSIX.2-1992 C Language Binding Option
 356  */
 357
 358 #if __DARWIN_C_LEVEL >= 199209L
 359 __BEGIN_DECLS
 360 int      pclose(FILE *);
 361 #if defined(_DARWIN_UNLIMITED_STREAMS) || defined(_DARWIN_C_SOURCE)
 362 FILE    *popen(const char *, const char *) __DARWIN_ALIAS_STARTING(__MAC_10_6, __IPHONE_3_2, __DARWIN_EXTSN(popen));
 363 #else /* !_DARWIN_UNLIMITED_STREAMS && !_DARWIN_C_SOURCE */
 364 //Begin-Libc
 365 #ifndef LIBC_ALIAS_POPEN
 366 //End-Libc
 367 FILE    *popen(const char *, const char *) __DARWIN_ALIAS_STARTING(__MAC_10_6, __IPHONE_2_0, __DARWIN_ALIAS(popen));
 368 //Begin-Libc
 369 #else /* LIBC_ALIAS_POPEN */
 370 FILE    *popen(const char *, const char *) LIBC_ALIAS(popen);
 371 #endif /* !LIBC_ALIAS_POPEN */
 372 //End-Libc
 373 #endif /* (DARWIN_UNLIMITED_STREAMS || _DARWIN_C_SOURCE) */
 374 __END_DECLS
 375 #endif /* __DARWIN_C_LEVEL >= 199209L */
 376
 377
 378
 379
 380 /* Additional functionality provided by:
 381  * POSIX.1c-1995,
 382  * POSIX.1i-1995,
 383  * and the omnibus ISO/IEC 9945-1: 1996
 384  */
 385
 386 #if __DARWIN_C_LEVEL >= 199506L
 387
 388 /* Functions internal to the implementation. */
 389 __BEGIN_DECLS
 390 int     __srget(FILE *);
 391 int     __svfscanf(FILE *, const char *, va_list) __DARWIN_LDBL_COMPAT(__svfscanf) __scanflike(2, 0);
 392 int     __swbuf(int, FILE *);
 393 __END_DECLS
 394
 395 /*
 396  * The __sfoo macros are here so that we can
 397  * define function versions in the C library.
 398  */
 399 #define __sgetc(p) (--(p)->_r < 0 ? __srget(p) : (int)(*(p)->_p++))
 400 #if defined(__GNUC__) && defined(__STDC__)
 401 static __inline int __sputc(int _c, FILE *_p) {
 402         if (--_p->_w >= 0 || (_p->_w >= _p->_lbfsize && (char)_c != '\n'))
 403                 return (*_p->_p++ = _c);
 404         else
 405                 return (__swbuf(_c, _p));
 406 }
 407 #else
 408 /*
 409  * This has been tuned to generate reasonable code on the vax using pcc.
 410  */
 411 #define __sputc(c, p) \
 412         (--(p)->_w < 0 ? \
 413                 (p)->_w >= (p)->_lbfsize ? \
 414                         (*(p)->_p = (c)), *(p)->_p != '\n' ? \
 415                                 (int)*(p)->_p++ : \
 416                                 __swbuf('\n', p) : \
 417                         __swbuf((int)(c), p) : \
 418                 (*(p)->_p = (c), (int)*(p)->_p++))
 419 #endif
 420
 421 #define __sfeof(p)      (((p)->_flags & __SEOF) != 0)
 422 #define __sferror(p)    (((p)->_flags & __SERR) != 0)
 423 #define __sclearerr(p)  ((void)((p)->_flags &= ~(__SERR|__SEOF)))
 424 #define __sfileno(p)    ((p)->_file)
 425
 426 __BEGIN_DECLS
 427 void     flockfile(FILE *);
 428 int      ftrylockfile(FILE *);
 429 void     funlockfile(FILE *);
 430 int      getc_unlocked(FILE *);
 431 int      getchar_unlocked(void);
 432 int      putc_unlocked(int, FILE *);
 433 int      putchar_unlocked(int);
 434
 435 /* Removed in Issue 6 */
 436 #if !defined(_POSIX_C_SOURCE) || _POSIX_C_SOURCE < 200112L
 437 int      getw(FILE *);
 438 int      putw(int, FILE *);
 439 #endif
 440
 441 //Begin-Libc
 442 #ifndef LIBC_ALIAS_TEMPNAM
 443 //End-Libc
 444 char    *tempnam(const char *, const char *) __DARWIN_ALIAS(tempnam);
 445 //Begin-Libc
 446 #else /* LIBC_ALIAS_TEMPNAM */
 447 char    *tempnam(const char *, const char *) LIBC_ALIAS(tempnam);
 448 #endif /* !LIBC_ALIAS_TEMPNAM */
 449 //End-Libc
 450 __END_DECLS
 451
 452 #ifndef lint
 453 #define getc_unlocked(fp)       __sgetc(fp)
 454 #define putc_unlocked(x, fp)    __sputc(x, fp)
 455 #endif /* lint */
 456
 457 #define getchar_unlocked()      getc_unlocked(stdin)
 458 #define putchar_unlocked(x)     putc_unlocked(x, stdout)
 459 #endif /* __DARWIN_C_LEVEL >= 199506L */
 460
 461
 462
 463 /* Additional functionality provided by:
 464  * POSIX.1-2001
 465  * ISO C99
 466  */
 467
 468 #if __DARWIN_C_LEVEL >= 200112L
 469 #ifndef _OFF_T
 470 #define _OFF_T
 471 typedef __darwin_off_t          off_t;
 472 #endif
 473
 474 __BEGIN_DECLS
 475 int      fseeko(FILE *, off_t, int);
 476 off_t    ftello(FILE *);
 477 __END_DECLS
 478 #endif /* __DARWIN_C_LEVEL >= 200112L */
 479
 480 #if __DARWIN_C_LEVEL >= 200112L || defined(_C99_SOURCE) || defined(__cplusplus)
 481 __BEGIN_DECLS
 482 int      snprintf(char * __restrict, size_t, const char * __restrict, ...) __DARWIN_LDBL_COMPAT(snprintf) __printflike(3, 4);
 483 int      vfscanf(FILE * __restrict, const char * __restrict, va_list) __DARWIN_LDBL_COMPAT(vfscanf) __scanflike(2, 0);
 484 int      vscanf(const char * __restrict, va_list) __DARWIN_LDBL_COMPAT(vscanf) __scanflike(1, 0);
 485 int      vsnprintf(char * __restrict, size_t, const char * __restrict, va_list) __DARWIN_LDBL_COMPAT(vsnprintf) __printflike(3, 0);
 486 int      vsscanf(const char * __restrict, const char * __restrict, va_list) __DARWIN_LDBL_COMPAT(vsscanf) __scanflike(2, 0);
 487 __END_DECLS
 488 #endif /* __DARWIN_C_LEVEL >= 200112L || defined(_C99_SOURCE) || defined(__cplusplus) */
 489
 490
 491
 492 /* Additional functionality provided by:
 493  * POSIX.1-2008
 494  */
 495
 496 #if __DARWIN_C_LEVEL >= 200809L
 497 #ifndef _SSIZE_T
 498 #define _SSIZE_T
 499 typedef __darwin_ssize_t        ssize_t;
 500 #endif
 501
 502 __BEGIN_DECLS
 503 int     dprintf(int, const char * __restrict, ...) __DARWIN_LDBL_COMPAT(dprintf) __printflike(2, 3) __OSX_AVAILABLE_STARTING(__MAC_10_7, __IPHONE_4_3);
 504 int     vdprintf(int, const char * __restrict, va_list) __DARWIN_LDBL_COMPAT(vdprintf) __printflike(2, 0) __OSX_AVAILABLE_STARTING(__MAC_10_7, __IPHONE_4_3);
 505 ssize_t getdelim(char ** __restrict, size_t * __restrict, int, FILE * __restrict) __OSX_AVAILABLE_STARTING(__MAC_10_7, __IPHONE_4_3);
 506 ssize_t getline(char ** __restrict, size_t * __restrict, FILE * __restrict) __OSX_AVAILABLE_STARTING(__MAC_10_7, __IPHONE_4_3);
 507 __END_DECLS
 508 #endif /* __DARWIN_C_LEVEL >= 200809L */
 509
 510
 511
 512 /* Darwin extensions */
 513
 514 #if __DARWIN_C_LEVEL >= __DARWIN_C_FULL
 515 __BEGIN_DECLS
 516 extern __const int sys_nerr;            /* perror(3) external variables */
 517 extern __const char *__const sys_errlist[];
 518
 519 int      asprintf(char **, const char *, ...) __DARWIN_LDBL_COMPAT(asprintf) __printflike(2, 3);
 520 char    *ctermid_r(char *);
 521 char    *fgetln(FILE *, size_t *);
 522 __const char *fmtcheck(const char *, const char *);
 523 int      fpurge(FILE *);
 524 void     setbuffer(FILE *, char *, int);
 525 int      setlinebuf(FILE *);
 526 int      vasprintf(char **, const char *, va_list) __DARWIN_LDBL_COMPAT(vasprintf) __printflike(2, 0);
 527 FILE    *zopen(const char *, const char *, int);
 528
 529
 530 /*
 531  * Stdio function-access interface.
 532  */
 533 FILE    *funopen(const void *,
 534                  int (*)(void *, char *, int),
 535                  int (*)(void *, const char *, int),
 536                  fpos_t (*)(void *, fpos_t, int),
 537                  int (*)(void *));
 538 __END_DECLS
 539 #define fropen(cookie, fn) funopen(cookie, fn, 0, 0, 0)
 540 #define fwopen(cookie, fn) funopen(cookie, 0, fn, 0, 0)
 541
 542 #define feof_unlocked(p)        __sfeof(p)
 543 #define ferror_unlocked(p)      __sferror(p)
 544 #define clearerr_unlocked(p)    __sclearerr(p)
 545 #define fileno_unlocked(p)      __sfileno(p)
 546
 547 #endif /* __DARWIN_C_LEVEL >= __DARWIN_C_FULL */
 548
 549
 550 #ifdef _USE_EXTENDED_LOCALES_
 551 #include <xlocale/_stdio.h>
 552 #endif /* _USE_EXTENDED_LOCALES_ */
 553
 554 #if defined (__GNUC__) && _FORTIFY_SOURCE > 0 && !defined (__cplusplus)
 555 /* Security checking functions.  */
 556 #include <secure/_stdio.h>
 557 #endif
 558
 559 #endif /* _STDIO_H_ */