include/stdio.h

   1 /*-
   2  * Copyright (c) 1990, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * This code is derived from software contributed to Berkeley by
   6  * Chris Torek.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. Neither the name of the University nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  *
  32  *      @(#)stdio.h     8.5 (Berkeley) 4/29/95
  33  * $FreeBSD$
  34  */
  35
  36 #ifndef _STDIO_H_
  37 #define _STDIO_H_
  38
  39 #include <sys/cdefs.h>
  40 #include <sys/_null.h>
  41 #include <sys/_types.h>
  42
  43 typedef __off_t         fpos_t;
  44
  45 #ifndef _SIZE_T_DECLARED
  46 typedef __size_t        size_t;
  47 #define _SIZE_T_DECLARED
  48 #endif
  49
  50 #if __POSIX_VISIBLE >= 200809
  51 #ifndef _OFF_T_DECLARED
  52 #define _OFF_T_DECLARED
  53 typedef __off_t         off_t;
  54 #endif
  55 #ifndef _SSIZE_T_DECLARED
  56 #define _SSIZE_T_DECLARED
  57 typedef __ssize_t       ssize_t;
  58 #endif
  59 #endif
  60
  61 #ifndef _OFF64_T_DECLARED
  62 #define _OFF64_T_DECLARED
  63 typedef __off64_t       off64_t;
  64 #endif
  65
  66 #if __POSIX_VISIBLE >= 200112 || __XSI_VISIBLE
  67 #ifndef _VA_LIST_DECLARED
  68 typedef __va_list       va_list;
  69 #define _VA_LIST_DECLARED
  70 #endif
  71 #endif
  72
  73 #define _FSTDIO                 /* Define for new stdio with functions. */
  74
  75 /*
  76  * NB: to fit things in six character monocase externals, the stdio
  77  * code uses the prefix `__s' for stdio objects, typically followed
  78  * by a three-character attempt at a mnemonic.
  79  */
  80
  81 /* stdio buffers */
  82 struct __sbuf {
  83         unsigned char *_base;
  84         int     _size;
  85 };
  86
  87 /*
  88  * stdio state variables.
  89  *
  90  * The following always hold:
  91  *
  92  *      if (_flags&(__SLBF|__SWR)) == (__SLBF|__SWR),
  93  *              _lbfsize is -_bf._size, else _lbfsize is 0
  94  *      if _flags&__SRD, _w is 0
  95  *      if _flags&__SWR, _r is 0
  96  *
  97  * This ensures that the getc and putc macros (or inline functions) never
  98  * try to write or read from a file that is in `read' or `write' mode.
  99  * (Moreover, they can, and do, automatically switch from read mode to
 100  * write mode, and back, on "r+" and "w+" files.)
 101  *
 102  * _lbfsize is used only to make the inline line-buffered output stream
 103  * code as compact as possible.
 104  *
 105  * _ub, _up, and _ur are used when ungetc() pushes back more characters
 106  * than fit in the current _bf, or when ungetc() pushes back a character
 107  * that does not match the previous one in _bf.  When this happens,
 108  * _ub._base becomes non-nil (i.e., a stream has ungetc() data iff
 109  * _ub._base!=NULL) and _up and _ur save the current values of _p and _r.
 110  *
 111  * Certain members of __sFILE are accessed directly via macros or
 112  * inline functions.  To preserve ABI compat, these members must not
 113  * be disturbed.  These members are marked below with (*).
 114  */
 115 struct __sFILE {
 116         unsigned char *_p;      /* (*) current position in (some) buffer */
 117         int     _r;             /* (*) read space left for getc() */
 118         int     _w;             /* (*) write space left for putc() */
 119         short   _flags;         /* (*) flags, below; this FILE is free if 0 */
 120         short   _file;          /* (*) fileno, if Unix descriptor, else -1 */
 121         struct  __sbuf _bf;     /* (*) the buffer (at least 1 byte, if !NULL) */
 122         int     _lbfsize;       /* (*) 0 or -_bf._size, for inline putc */
 123
 124         /* operations */
 125         void    *_cookie;       /* (*) cookie passed to io functions */
 126         int     (*_close)(void *);
 127         int     (*_read)(void *, char *, int);
 128         fpos_t  (*_seek)(void *, fpos_t, int);
 129         int     (*_write)(void *, const char *, int);
 130
 131         /* separate buffer for long sequences of ungetc() */
 132         struct  __sbuf _ub;     /* ungetc buffer */
 133         unsigned char   *_up;   /* saved _p when _p is doing ungetc data */
 134         int     _ur;            /* saved _r when _r is counting ungetc data */
 135
 136         /* tricks to meet minimum requirements even when malloc() fails */
 137         unsigned char _ubuf[3]; /* guarantee an ungetc() buffer */
 138         unsigned char _nbuf[1]; /* guarantee a getc() buffer */
 139
 140         /* separate buffer for fgetln() when line crosses buffer boundary */
 141         struct  __sbuf _lb;     /* buffer for fgetln() */
 142
 143         /* Unix stdio files get aligned to block boundaries on fseek() */
 144         int     _blksize;       /* stat.st_blksize (may be != _bf._size) */
 145         fpos_t  _offset;        /* current lseek offset */
 146
 147         struct pthread_mutex *_fl_mutex;        /* used for MT-safety */
 148         struct pthread *_fl_owner;      /* current owner */
 149         int     _fl_count;      /* recursive lock count */
 150         int     _orientation;   /* orientation for fwide() */
 151         __mbstate_t _mbstate;   /* multibyte conversion state */
 152         int     _flags2;        /* additional flags */
 153 };
 154 #ifndef _STDFILE_DECLARED
 155 #define _STDFILE_DECLARED
 156 typedef struct __sFILE FILE;
 157 #endif
 158 #ifndef _STDSTREAM_DECLARED
 159 __BEGIN_DECLS
 160 extern FILE *__stdinp;
 161 extern FILE *__stdoutp;
 162 extern FILE *__stderrp;
 163 __END_DECLS
 164 #define _STDSTREAM_DECLARED
 165 #endif
 166
 167 #define __SLBF  0x0001          /* line buffered */
 168 #define __SNBF  0x0002          /* unbuffered */
 169 #define __SRD   0x0004          /* OK to read */
 170 #define __SWR   0x0008          /* OK to write */
 171         /* RD and WR are never simultaneously asserted */
 172 #define __SRW   0x0010          /* open for reading & writing */
 173 #define __SEOF  0x0020          /* found EOF */
 174 #define __SERR  0x0040          /* found error */
 175 #define __SMBF  0x0080          /* _bf._base is from malloc */
 176 #define __SAPP  0x0100          /* fdopen()ed in append mode */
 177 #define __SSTR  0x0200          /* this is an sprintf/snprintf string */
 178 #define __SOPT  0x0400          /* do fseek() optimization */
 179 #define __SNPT  0x0800          /* do not do fseek() optimization */
 180 #define __SOFF  0x1000          /* set iff _offset is in fact correct */
 181 #define __SMOD  0x2000          /* true => fgetln modified _p text */
 182 #define __SALC  0x4000          /* allocate string space dynamically */
 183 #define __SIGN  0x8000          /* ignore this file in _fwalk */
 184
 185 #define __S2OAP 0x0001          /* O_APPEND mode is set */
 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 /*
 204  * FOPEN_MAX is a minimum maximum, and is the number of streams that
 205  * stdio can provide without attempting to allocate further resources
 206  * (which could fail).  Do not use this for anything.
 207  */
 208                                 /* must be == _POSIX_STREAM_MAX <limits.h> */
 209 #ifndef FOPEN_MAX
 210 #define FOPEN_MAX       20      /* must be <= OPEN_MAX <sys/syslimits.h> */
 211 #endif
 212 #define FILENAME_MAX    1024    /* must be <= PATH_MAX <sys/syslimits.h> */
 213
 214 /* System V/ANSI C; this is the wrong way to do this, do *not* use these. */
 215 #if __XSI_VISIBLE
 216 #define P_tmpdir        "/tmp/"
 217 #endif
 218 #define L_tmpnam        1024    /* XXX must be == PATH_MAX */
 219 #define TMP_MAX         308915776
 220
 221 #ifndef SEEK_SET
 222 #define SEEK_SET        0       /* set file offset to offset */
 223 #endif
 224 #ifndef SEEK_CUR
 225 #define SEEK_CUR        1       /* set file offset to current plus offset */
 226 #endif
 227 #ifndef SEEK_END
 228 #define SEEK_END        2       /* set file offset to EOF plus offset */
 229 #endif
 230
 231 #define stdin   __stdinp
 232 #define stdout  __stdoutp
 233 #define stderr  __stderrp
 234
 235 __BEGIN_DECLS
 236 #ifdef _XLOCALE_H_
 237 #include <xlocale/_stdio.h>
 238 #endif
 239 /*
 240  * Functions defined in ANSI C standard.
 241  */
 242 void     clearerr(FILE *);
 243 int      fclose(FILE *);
 244 int      feof(FILE *);
 245 int      ferror(FILE *);
 246 int      fflush(FILE *);
 247 int      fgetc(FILE *);
 248 int      fgetpos(FILE * __restrict, fpos_t * __restrict);
 249 char    *fgets(char * __restrict, int, FILE * __restrict);
 250 FILE    *fopen(const char * __restrict, const char * __restrict);
 251 int      fprintf(FILE * __restrict, const char * __restrict, ...);
 252 int      fputc(int, FILE *);
 253 int      fputs(const char * __restrict, FILE * __restrict);
 254 size_t   fread(void * __restrict, size_t, size_t, FILE * __restrict);
 255 FILE    *freopen(const char * __restrict, const char * __restrict, FILE * __restrict);
 256 int      fscanf(FILE * __restrict, const char * __restrict, ...);
 257 int      fseek(FILE *, long, int);
 258 int      fsetpos(FILE *, const fpos_t *);
 259 long     ftell(FILE *);
 260 size_t   fwrite(const void * __restrict, size_t, size_t, FILE * __restrict);
 261 int      getc(FILE *);
 262 int      getchar(void);
 263 char    *gets(char *);
 264 void     perror(const char *);
 265 int      printf(const char * __restrict, ...);
 266 int      putc(int, FILE *);
 267 int      putchar(int);
 268 int      puts(const char *);
 269 int      remove(const char *);
 270 int      rename(const char *, const char *);
 271 void     rewind(FILE *);
 272 int      scanf(const char * __restrict, ...);
 273 void     setbuf(FILE * __restrict, char * __restrict);
 274 int      setvbuf(FILE * __restrict, char * __restrict, int, size_t);
 275 int      sprintf(char * __restrict, const char * __restrict, ...);
 276 int      sscanf(const char * __restrict, const char * __restrict, ...);
 277 FILE    *tmpfile(void);
 278 char    *tmpnam(char *);
 279 int      ungetc(int, FILE *);
 280 int      vfprintf(FILE * __restrict, const char * __restrict,
 281             __va_list);
 282 int      vprintf(const char * __restrict, __va_list);
 283 int      vsprintf(char * __restrict, const char * __restrict,
 284             __va_list);
 285
 286 #if __ISO_C_VISIBLE >= 1999
 287 int      snprintf(char * __restrict, size_t, const char * __restrict,
 288             ...) __printflike(3, 4);
 289 int      vfscanf(FILE * __restrict, const char * __restrict, __va_list)
 290             __scanflike(2, 0);
 291 int      vscanf(const char * __restrict, __va_list) __scanflike(1, 0);
 292 int      vsnprintf(char * __restrict, size_t, const char * __restrict,
 293             __va_list) __printflike(3, 0);
 294 int      vsscanf(const char * __restrict, const char * __restrict, __va_list)
 295             __scanflike(2, 0);
 296 #endif
 297
 298 /*
 299  * Functions defined in all versions of POSIX 1003.1.
 300  */
 301 #if __BSD_VISIBLE || (__POSIX_VISIBLE && __POSIX_VISIBLE <= 199506)
 302 #define L_cuserid       17      /* size for cuserid(3); MAXLOGNAME, legacy */
 303 #endif
 304
 305 #if __POSIX_VISIBLE
 306 #define L_ctermid       1024    /* size for ctermid(3); PATH_MAX */
 307
 308 char    *ctermid(char *);
 309 FILE    *fdopen(int, const char *);
 310 int      fileno(FILE *);
 311 #endif /* __POSIX_VISIBLE */
 312
 313 #if __POSIX_VISIBLE >= 199209
 314 int      pclose(FILE *);
 315 FILE    *popen(const char *, const char *);
 316 #endif
 317
 318 #if __POSIX_VISIBLE >= 199506
 319 int      ftrylockfile(FILE *);
 320 void     flockfile(FILE *);
 321 void     funlockfile(FILE *);
 322
 323 /*
 324  * These are normally used through macros as defined below, but POSIX
 325  * requires functions as well.
 326  */
 327 int      getc_unlocked(FILE *);
 328 int      getchar_unlocked(void);
 329 int      putc_unlocked(int, FILE *);
 330 int      putchar_unlocked(int);
 331 #endif
 332 #if __BSD_VISIBLE
 333 void     clearerr_unlocked(FILE *);
 334 int      feof_unlocked(FILE *);
 335 int      ferror_unlocked(FILE *);
 336 int      fileno_unlocked(FILE *);
 337 #endif
 338
 339 #if __POSIX_VISIBLE >= 200112
 340 int      fseeko(FILE *, __off_t, int);
 341 __off_t  ftello(FILE *);
 342 #endif
 343
 344 #if __BSD_VISIBLE || __XSI_VISIBLE > 0 && __XSI_VISIBLE < 600
 345 int      getw(FILE *);
 346 int      putw(int, FILE *);
 347 #endif /* BSD or X/Open before issue 6 */
 348
 349 #if __XSI_VISIBLE
 350 char    *tempnam(const char *, const char *);
 351 #endif
 352
 353 #if __POSIX_VISIBLE >= 200809
 354 FILE    *fmemopen(void * __restrict, size_t, const char * __restrict);
 355 ssize_t  getdelim(char ** __restrict, size_t * __restrict, int,
 356             FILE * __restrict);
 357 FILE    *open_memstream(char **, size_t *);
 358 int      renameat(int, const char *, int, const char *);
 359 int      vdprintf(int, const char * __restrict, __va_list);
 360
 361 /*
 362  * Every programmer and his dog wrote functions called getline() and dprintf()
 363  * before POSIX.1-2008 came along and decided to usurp the names, so we
 364  * don't prototype them by default unless one of the following is true:
 365  *   a) the app has requested them specifically by defining _WITH_GETLINE or
 366  *      _WITH_DPRINTF, respectively
 367  *   b) the app has requested a POSIX.1-2008 environment via _POSIX_C_SOURCE
 368  *   c) the app defines a GNUism such as _BSD_SOURCE or _GNU_SOURCE
 369  */
 370 #ifndef _WITH_GETLINE
 371 #if defined(_BSD_SOURCE) || defined(_GNU_SOURCE)
 372 #define _WITH_GETLINE
 373 #elif defined(_POSIX_C_SOURCE)
 374 #if _POSIX_C_SOURCE >= 200809
 375 #define _WITH_GETLINE
 376 #endif
 377 #endif
 378 #endif
 379
 380 #ifdef _WITH_GETLINE
 381 ssize_t  getline(char ** __restrict, size_t * __restrict, FILE * __restrict);
 382 #endif
 383
 384 #ifndef _WITH_DPRINTF
 385 #if defined(_BSD_SOURCE) || defined(_GNU_SOURCE)
 386 #define _WITH_DPRINTF
 387 #elif defined(_POSIX_C_SOURCE)
 388 #if _POSIX_C_SOURCE >= 200809
 389 #define _WITH_DPRINTF
 390 #endif
 391 #endif
 392 #endif
 393
 394 #ifdef _WITH_DPRINTF
 395 int      (dprintf)(int, const char * __restrict, ...);
 396 #endif
 397
 398 #endif /* __POSIX_VISIBLE >= 200809 */
 399
 400 /*
 401  * Routines that are purely local.
 402  */
 403 #if __BSD_VISIBLE
 404 int      asprintf(char **, const char *, ...) __printflike(2, 3);
 405 char    *ctermid_r(char *);
 406 void     fcloseall(void);
 407 int      fdclose(FILE *, int *);
 408 char    *fgetln(FILE *, size_t *);
 409 const char *fmtcheck(const char *, const char *) __format_arg(2);
 410 int      fpurge(FILE *);
 411 void     setbuffer(FILE *, char *, int);
 412 int      setlinebuf(FILE *);
 413 int      vasprintf(char **, const char *, __va_list)
 414             __printflike(2, 0);
 415
 416 /*
 417  * The system error table contains messages for the first sys_nerr
 418  * positive errno values.  Use strerror() or strerror_r() from <string.h>
 419  * instead.
 420  */
 421 extern const int sys_nerr;
 422 extern const char * const sys_errlist[];
 423
 424 /*
 425  * Stdio function-access interface.
 426  */
 427 FILE    *funopen(const void *,
 428             int (*)(void *, char *, int),
 429             int (*)(void *, const char *, int),
 430             fpos_t (*)(void *, fpos_t, int),
 431             int (*)(void *));
 432 #define fropen(cookie, fn) funopen(cookie, fn, 0, 0, 0)
 433 #define fwopen(cookie, fn) funopen(cookie, 0, fn, 0, 0)
 434
 435 typedef __ssize_t cookie_read_function_t(void *, char *, size_t);
 436 typedef __ssize_t cookie_write_function_t(void *, const char *, size_t);
 437 typedef int cookie_seek_function_t(void *, off64_t *, int);
 438 typedef int cookie_close_function_t(void *);
 439 typedef struct {
 440         cookie_read_function_t  *read;
 441         cookie_write_function_t *write;
 442         cookie_seek_function_t  *seek;
 443         cookie_close_function_t *close;
 444 } cookie_io_functions_t;
 445 FILE    *fopencookie(void *, const char *, cookie_io_functions_t);
 446
 447 /*
 448  * Portability hacks.  See <sys/types.h>.
 449  */
 450 #ifndef _FTRUNCATE_DECLARED
 451 #define _FTRUNCATE_DECLARED
 452 int      ftruncate(int, __off_t);
 453 #endif
 454 #ifndef _LSEEK_DECLARED
 455 #define _LSEEK_DECLARED
 456 __off_t  lseek(int, __off_t, int);
 457 #endif
 458 #ifndef _MMAP_DECLARED
 459 #define _MMAP_DECLARED
 460 void    *mmap(void *, size_t, int, int, int, __off_t);
 461 #endif
 462 #ifndef _TRUNCATE_DECLARED
 463 #define _TRUNCATE_DECLARED
 464 int      truncate(const char *, __off_t);
 465 #endif
 466 #endif /* __BSD_VISIBLE */
 467
 468 /*
 469  * Functions internal to the implementation.
 470  */
 471 int     __srget(FILE *);
 472 int     __swbuf(int, FILE *);
 473
 474 /*
 475  * The __sfoo macros are here so that we can
 476  * define function versions in the C library.
 477  */
 478 #define __sgetc(p) (--(p)->_r < 0 ? __srget(p) : (int)(*(p)->_p++))
 479 #if defined(__GNUC__) && defined(__STDC__)
 480 static __inline int __sputc(int _c, FILE *_p) {
 481         if (--_p->_w >= 0 || (_p->_w >= _p->_lbfsize && (char)_c != '\n'))
 482                 return (*_p->_p++ = _c);
 483         else
 484                 return (__swbuf(_c, _p));
 485 }
 486 #else
 487 /*
 488  * This has been tuned to generate reasonable code on the vax using pcc.
 489  */
 490 #define __sputc(c, p) \
 491         (--(p)->_w < 0 ? \
 492                 (p)->_w >= (p)->_lbfsize ? \
 493                         (*(p)->_p = (c)), *(p)->_p != '\n' ? \
 494                                 (int)*(p)->_p++ : \
 495                                 __swbuf('\n', p) : \
 496                         __swbuf((int)(c), p) : \
 497                 (*(p)->_p = (c), (int)*(p)->_p++))
 498 #endif
 499
 500 extern int __isthreaded;
 501
 502 #ifndef __cplusplus
 503
 504 #define __sfeof(p)      (((p)->_flags & __SEOF) != 0)
 505 #define __sferror(p)    (((p)->_flags & __SERR) != 0)
 506 #define __sclearerr(p)  ((void)((p)->_flags &= ~(__SERR|__SEOF)))
 507 #define __sfileno(p)    ((p)->_file)
 508
 509
 510 #define feof(p)         (!__isthreaded ? __sfeof(p) : (feof)(p))
 511 #define ferror(p)       (!__isthreaded ? __sferror(p) : (ferror)(p))
 512 #define clearerr(p)     (!__isthreaded ? __sclearerr(p) : (clearerr)(p))
 513
 514 #if __POSIX_VISIBLE
 515 #define fileno(p)       (!__isthreaded ? __sfileno(p) : (fileno)(p))
 516 #endif
 517
 518 #define getc(fp)        (!__isthreaded ? __sgetc(fp) : (getc)(fp))
 519 #define putc(x, fp)     (!__isthreaded ? __sputc(x, fp) : (putc)(x, fp))
 520
 521 #define getchar()       getc(stdin)
 522 #define putchar(x)      putc(x, stdout)
 523
 524 #if __BSD_VISIBLE
 525 /*
 526  * See ISO/IEC 9945-1 ANSI/IEEE Std 1003.1 Second Edition 1996-07-12
 527  * B.8.2.7 for the rationale behind the *_unlocked() macros.
 528  */
 529 #define feof_unlocked(p)        __sfeof(p)
 530 #define ferror_unlocked(p)      __sferror(p)
 531 #define clearerr_unlocked(p)    __sclearerr(p)
 532 #define fileno_unlocked(p)      __sfileno(p)
 533 #endif
 534 #if __POSIX_VISIBLE >= 199506
 535 #define getc_unlocked(fp)       __sgetc(fp)
 536 #define putc_unlocked(x, fp)    __sputc(x, fp)
 537
 538 #define getchar_unlocked()      getc_unlocked(stdin)
 539 #define putchar_unlocked(x)     putc_unlocked(x, stdout)
 540 #endif
 541 #endif /* __cplusplus */
 542
 543 __END_DECLS
 544 #endif /* !_STDIO_H_ */