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stdio.h revision 1.93
      1 /*	$NetBSD: stdio.h,v 1.93 2015/01/20 17:29:00 christos Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1990, 1993
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * This code is derived from software contributed to Berkeley by
      8  * Chris Torek.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  * 3. Neither the name of the University nor the names of its contributors
     19  *    may be used to endorse or promote products derived from this software
     20  *    without specific prior written permission.
     21  *
     22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     32  * SUCH DAMAGE.
     33  *
     34  *	@(#)stdio.h	8.5 (Berkeley) 4/29/95
     35  */
     36 
     37 #ifndef	_STDIO_H_
     38 #define	_STDIO_H_
     39 
     40 #include <sys/cdefs.h>
     41 #include <sys/featuretest.h>
     42 #include <sys/ansi.h>
     43 
     44 #ifdef	_BSD_SIZE_T_
     45 typedef	_BSD_SIZE_T_	size_t;
     46 #undef	_BSD_SIZE_T_
     47 #endif
     48 #ifdef	_BSD_SSIZE_T_
     49 typedef	_BSD_SSIZE_T_	ssize_t;
     50 #undef	_BSD_SSIZE_T_
     51 #endif
     52 
     53 #if defined(_POSIX_C_SOURCE)
     54 #ifndef __VA_LIST_DECLARED
     55 typedef __va_list va_list;
     56 #define __VA_LIST_DECLARED
     57 #endif
     58 #endif
     59 
     60 #include <sys/null.h>
     61 
     62 /*
     63  * This is fairly grotesque, but pure ANSI code must not inspect the
     64  * innards of an fpos_t anyway.  The library internally uses off_t,
     65  * which we assume is exactly as big as eight chars.
     66  */
     67 typedef struct __sfpos {
     68 	__off_t _pos;
     69 	__mbstate_t _mbstate_in, _mbstate_out;
     70 } fpos_t;
     71 
     72 #define	_FSTDIO			/* Define for new stdio with functions. */
     73 
     74 /*
     75  * NB: to fit things in six character monocase externals, the stdio
     76  * code uses the prefix `__s' for stdio objects, typically followed
     77  * by a three-character attempt at a mnemonic.
     78  */
     79 
     80 /* stdio buffers */
     81 struct __sbuf {
     82 	unsigned char *_base;
     83 	int	_size;
     84 };
     85 
     86 /*
     87  * stdio state variables.
     88  *
     89  * The following always hold:
     90  *
     91  *	if (_flags&(__SLBF|__SWR)) == (__SLBF|__SWR),
     92  *		_lbfsize is -_bf._size, else _lbfsize is 0
     93  *	if _flags&__SRD, _w is 0
     94  *	if _flags&__SWR, _r is 0
     95  *
     96  * This ensures that the getc and putc macros (or inline functions) never
     97  * try to write or read from a file that is in `read' or `write' mode.
     98  * (Moreover, they can, and do, automatically switch from read mode to
     99  * write mode, and back, on "r+" and "w+" files.)
    100  *
    101  * _lbfsize is used only to make the inline line-buffered output stream
    102  * code as compact as possible.
    103  *
    104  * _ub, _up, and _ur are used when ungetc() pushes back more characters
    105  * than fit in the current _bf, or when ungetc() pushes back a character
    106  * that does not match the previous one in _bf.  When this happens,
    107  * _ub._base becomes non-nil (i.e., a stream has ungetc() data iff
    108  * _ub._base!=NULL) and _up and _ur save the current values of _p and _r.
    109  *
    110  * NB: see WARNING above before changing the layout of this structure!
    111  */
    112 typedef	struct __sFILE {
    113 	unsigned char *_p;	/* current position in (some) buffer */
    114 	int	_r;		/* read space left for getc() */
    115 	int	_w;		/* write space left for putc() */
    116 	unsigned short _flags;	/* flags, below; this FILE is free if 0 */
    117 	short	_file;		/* fileno, if Unix descriptor, else -1 */
    118 	struct	__sbuf _bf;	/* the buffer (at least 1 byte, if !NULL) */
    119 	int	_lbfsize;	/* 0 or -_bf._size, for inline putc */
    120 
    121 	/* operations */
    122 	void	*_cookie;	/* cookie passed to io functions */
    123 	int	(*_close)(void *);
    124 	ssize_t	(*_read) (void *, void *, size_t);
    125 	__off_t	(*_seek) (void *, __off_t, int);
    126 	ssize_t	(*_write)(void *, const void *, size_t);
    127 
    128 	/* file extension */
    129 	struct	__sbuf _ext;
    130 
    131 	/* separate buffer for long sequences of ungetc() */
    132 	unsigned char *_up;	/* saved _p when _p is doing ungetc data */
    133 	int	_ur;		/* saved _r when _r is counting ungetc data */
    134 
    135 	/* tricks to meet minimum requirements even when malloc() fails */
    136 	unsigned char _ubuf[3];	/* guarantee an ungetc() buffer */
    137 	unsigned char _nbuf[1];	/* guarantee a getc() buffer */
    138 
    139 	int	(*_flush)(void *);
    140 	/* Formerly used by fgetln/fgetwln; kept for binary compatibility */
    141 	char	_lb_unused[sizeof(struct __sbuf) - sizeof(int (*)(void *))];
    142 
    143 	/* Unix stdio files get aligned to block boundaries on fseek() */
    144 	int	_blksize;	/* stat.st_blksize (may be != _bf._size) */
    145 	__off_t	_offset;	/* current lseek offset */
    146 } FILE;
    147 
    148 __BEGIN_DECLS
    149 extern FILE __sF[3];
    150 __END_DECLS
    151 
    152 #define	__SLBF	0x0001		/* line buffered */
    153 #define	__SNBF	0x0002		/* unbuffered */
    154 #define	__SRD	0x0004		/* OK to read */
    155 #define	__SWR	0x0008		/* OK to write */
    156 	/* RD and WR are never simultaneously asserted */
    157 #define	__SRW	0x0010		/* open for reading & writing */
    158 #define	__SEOF	0x0020		/* found EOF */
    159 #define	__SERR	0x0040		/* found error */
    160 #define	__SMBF	0x0080		/* _buf is from malloc */
    161 #define	__SAPP	0x0100		/* fdopen()ed in append mode */
    162 #define	__SSTR	0x0200		/* this is an sprintf/snprintf string */
    163 #define	__SOPT	0x0400		/* do fseek() optimization */
    164 #define	__SNPT	0x0800		/* do not do fseek() optimization */
    165 #define	__SOFF	0x1000		/* set iff _offset is in fact correct */
    166 #define	__SMOD	0x2000		/* true => fgetln modified _p text */
    167 #define	__SALC	0x4000		/* allocate string space dynamically */
    168 
    169 /*
    170  * The following three definitions are for ANSI C, which took them
    171  * from System V, which brilliantly took internal interface macros and
    172  * made them official arguments to setvbuf(), without renaming them.
    173  * Hence, these ugly _IOxxx names are *supposed* to appear in user code.
    174  *
    175  * Although numbered as their counterparts above, the implementation
    176  * does not rely on this.
    177  */
    178 #define	_IOFBF	0		/* setvbuf should set fully buffered */
    179 #define	_IOLBF	1		/* setvbuf should set line buffered */
    180 #define	_IONBF	2		/* setvbuf should set unbuffered */
    181 
    182 #define	BUFSIZ	1024		/* size of buffer used by setbuf */
    183 #define	EOF	(-1)
    184 
    185 /*
    186  * FOPEN_MAX is a minimum maximum, and is the number of streams that
    187  * stdio can provide without attempting to allocate further resources
    188  * (which could fail).  Do not use this for anything.
    189  */
    190 				/* must be == _POSIX_STREAM_MAX <limits.h> */
    191 #define	FOPEN_MAX	20	/* must be <= OPEN_MAX <sys/syslimits.h> */
    192 #define	FILENAME_MAX	1024	/* must be <= PATH_MAX <sys/syslimits.h> */
    193 
    194 /* System V/ANSI C; this is the wrong way to do this, do *not* use these. */
    195 #if defined(_XOPEN_SOURCE) || defined(_NETBSD_SOURCE)
    196 #define	P_tmpdir	"/var/tmp/"
    197 #endif
    198 #define	L_tmpnam	1024	/* XXX must be == PATH_MAX */
    199 /* Always ensure that this is consistent with <limits.h> */
    200 #ifndef TMP_MAX
    201 #define TMP_MAX			308915776	/* Legacy */
    202 #endif
    203 
    204 /* Always ensure that these are consistent with <fcntl.h> and <unistd.h>! */
    205 #ifndef SEEK_SET
    206 #define	SEEK_SET	0	/* set file offset to offset */
    207 #endif
    208 #ifndef SEEK_CUR
    209 #define	SEEK_CUR	1	/* set file offset to current plus offset */
    210 #endif
    211 #ifndef SEEK_END
    212 #define	SEEK_END	2	/* set file offset to EOF plus offset */
    213 #endif
    214 
    215 #define	stdin	(&__sF[0])
    216 #define	stdout	(&__sF[1])
    217 #define	stderr	(&__sF[2])
    218 
    219 /*
    220  * Functions defined in ANSI C standard.
    221  */
    222 __BEGIN_DECLS
    223 void	 clearerr(FILE *);
    224 int	 fclose(FILE *);
    225 int	 feof(FILE *);
    226 int	 ferror(FILE *);
    227 int	 fflush(FILE *);
    228 int	 fgetc(FILE *);
    229 char	*fgets(char * __restrict, int, FILE * __restrict);
    230 FILE	*fopen(const char * __restrict , const char * __restrict);
    231 int	 fprintf(FILE * __restrict, const char * __restrict, ...)
    232 		__printflike(2, 3);
    233 int	 fputc(int, FILE *);
    234 int	 fputs(const char * __restrict, FILE * __restrict);
    235 size_t	 fread(void * __restrict, size_t, size_t, FILE * __restrict);
    236 FILE	*freopen(const char * __restrict, const char * __restrict,
    237 	    FILE * __restrict);
    238 int	 fscanf(FILE * __restrict, const char * __restrict, ...)
    239 		__scanflike(2, 3);
    240 int	 fseek(FILE *, long, int);
    241 long	 ftell(FILE *);
    242 size_t	 fwrite(const void * __restrict, size_t, size_t, FILE * __restrict);
    243 int	 getc(FILE *);
    244 int	 getchar(void);
    245 void	 perror(const char *);
    246 int	 printf(const char * __restrict, ...)
    247 		__printflike(1, 2);
    248 int	 putc(int, FILE *);
    249 int	 putchar(int);
    250 int	 puts(const char *);
    251 int	 remove(const char *);
    252 void	 rewind(FILE *);
    253 int	 scanf(const char * __restrict, ...)
    254 		__scanflike(1, 2);
    255 void	 setbuf(FILE * __restrict, char * __restrict);
    256 int	 setvbuf(FILE * __restrict, char * __restrict, int, size_t);
    257 int	 sscanf(const char * __restrict, const char * __restrict, ...)
    258 		__scanflike(2, 3);
    259 FILE	*tmpfile(void);
    260 int	 ungetc(int, FILE *);
    261 int	 vfprintf(FILE * __restrict, const char * __restrict, __va_list)
    262 		__printflike(2, 0);
    263 int	 vprintf(const char * __restrict, __va_list)
    264 		__printflike(1, 0);
    265 
    266 #ifndef __AUDIT__
    267 char	*gets(char *);
    268 int	 sprintf(char * __restrict, const char * __restrict, ...)
    269 		__printflike(2, 3);
    270 char	*tmpnam(char *);
    271 int	 vsprintf(char * __restrict, const char * __restrict,
    272     __va_list)
    273 		__printflike(2, 0);
    274 #endif
    275 
    276 #if defined(_POSIX_C_SOURCE) || defined(_XOPEN_SOURCE)
    277 int	 rename (const char *, const char *) __RENAME(__posix_rename);
    278 #else
    279 int	 rename (const char *, const char *);
    280 #endif
    281 __END_DECLS
    282 
    283 #ifndef __LIBC12_SOURCE__
    284 int	 fgetpos(FILE * __restrict, fpos_t * __restrict) __RENAME(__fgetpos50);
    285 int	 fsetpos(FILE *, const fpos_t *) __RENAME(__fsetpos50);
    286 #endif
    287 /*
    288  * IEEE Std 1003.1-90
    289  */
    290 #if defined(_POSIX_C_SOURCE) || defined(_XOPEN_SOURCE) || \
    291     defined(_NETBSD_SOURCE)
    292 #define	L_ctermid	1024	/* size for ctermid(); PATH_MAX */
    293 #define L_cuserid	9	/* size for cuserid(); UT_NAMESIZE + 1 */
    294 
    295 __BEGIN_DECLS
    296 char	*ctermid(char *);
    297 #ifndef __CUSERID_DECLARED
    298 #define __CUSERID_DECLARED
    299 /* also declared in unistd.h */
    300 char	*cuserid(char *);
    301 #endif /* __CUSERID_DECLARED */
    302 FILE	*fdopen(int, const char *);
    303 int	 fileno(FILE *);
    304 __END_DECLS
    305 #endif /* not ANSI */
    306 
    307 /*
    308  * IEEE Std 1003.1c-95, also adopted by X/Open CAE Spec Issue 5 Version 2
    309  */
    310 #if (_POSIX_C_SOURCE - 0) >= 199506L || (_XOPEN_SOURCE - 0) >= 500 || \
    311     defined(_REENTRANT) || defined(_NETBSD_SOURCE)
    312 __BEGIN_DECLS
    313 void	flockfile(FILE *);
    314 int	ftrylockfile(FILE *);
    315 void	funlockfile(FILE *);
    316 int	getc_unlocked(FILE *);
    317 int	getchar_unlocked(void);
    318 int	putc_unlocked(int, FILE *);
    319 int	putchar_unlocked(int);
    320 __END_DECLS
    321 #endif /* _POSIX_C_SOURCE >= 1995056 || _XOPEN_SOURCE >= 500 || ... */
    322 
    323 /*
    324  * Functions defined in POSIX 1003.2 and XPG2 or later.
    325  */
    326 #if (_POSIX_C_SOURCE - 0) >= 2 || (_XOPEN_SOURCE - 0) >= 2 || \
    327     defined(_NETBSD_SOURCE)
    328 __BEGIN_DECLS
    329 int	 pclose(FILE *);
    330 FILE	*popen(const char *, const char *);
    331 __END_DECLS
    332 #endif
    333 #ifdef _NETBSD_SOURCE
    334 FILE	*popenve(const char *, char *const *, char *const *, const char *);
    335 #endif
    336 
    337 /*
    338  * Functions defined in ISO XPG4.2, ISO C99, POSIX 1003.1-2001 or later.
    339  */
    340 #if ((__STDC_VERSION__ - 0) >= 199901L) || \
    341     ((_POSIX_C_SOURCE - 0) >= 200112L) || \
    342     (defined(_XOPEN_SOURCE) && defined(_XOPEN_SOURCE_EXTENDED)) || \
    343     ((_XOPEN_SOURCE - 0) >= 500) || \
    344     defined(_ISOC99_SOURCE) || defined(_NETBSD_SOURCE)
    345 __BEGIN_DECLS
    346 int	 snprintf(char * __restrict, size_t, const char * __restrict, ...)
    347 		__printflike(3, 4);
    348 int	 vsnprintf(char * __restrict, size_t, const char * __restrict,
    349 	    __va_list)
    350 		__printflike(3, 0);
    351 __END_DECLS
    352 #endif
    353 
    354 /*
    355  * Functions defined in XPG4.2.
    356  */
    357 #if defined(_XOPEN_SOURCE) || defined(_NETBSD_SOURCE)
    358 __BEGIN_DECLS
    359 int	 getw(FILE *);
    360 int	 putw(int, FILE *);
    361 
    362 #ifndef __AUDIT__
    363 char	*tempnam(const char *, const char *);
    364 #endif
    365 __END_DECLS
    366 #endif
    367 
    368 /*
    369  * X/Open CAE Specification Issue 5 Version 2
    370  */
    371 #if (_XOPEN_SOURCE - 0) >= 500 || defined(_LARGEFILE_SOURCE) || \
    372     defined(_NETBSD_SOURCE)
    373 #ifndef	off_t
    374 typedef	__off_t		off_t;
    375 #define	off_t		__off_t
    376 #endif /* off_t */
    377 
    378 __BEGIN_DECLS
    379 int	 fseeko(FILE *, off_t, int);
    380 off_t	 ftello(FILE *);
    381 __END_DECLS
    382 #endif /* _XOPEN_SOURCE >= 500 || _LARGEFILE_SOURCE || _NETBSD_SOURCE */
    383 
    384 /*
    385  * Functions defined in ISO C99.  Still put under _NETBSD_SOURCE due to
    386  * backward compatible.
    387  */
    388 #if defined(_ISOC99_SOURCE) || defined(_NETBSD_SOURCE)
    389 __BEGIN_DECLS
    390 int	 vscanf(const char * __restrict, __va_list)
    391 		__scanflike(1, 0);
    392 int	 vfscanf(FILE * __restrict, const char * __restrict, __va_list)
    393 		__scanflike(2, 0);
    394 int	 vsscanf(const char * __restrict, const char * __restrict,
    395     __va_list)
    396     __scanflike(2, 0);
    397 __END_DECLS
    398 #endif /* _ISOC99_SOURCE || _NETBSD_SOURCE */
    399 
    400 /*
    401  * Routines that are purely local.
    402  */
    403 #if defined(_NETBSD_SOURCE)
    404 
    405 #define	FPARSELN_UNESCESC	0x01
    406 #define	FPARSELN_UNESCCONT	0x02
    407 #define	FPARSELN_UNESCCOMM	0x04
    408 #define	FPARSELN_UNESCREST	0x08
    409 #define	FPARSELN_UNESCALL	0x0f
    410 
    411 __BEGIN_DECLS
    412 int	 asprintf(char ** __restrict, const char * __restrict, ...)
    413 		__printflike(2, 3);
    414 char	*fgetln(FILE * __restrict, size_t * __restrict);
    415 char	*fparseln(FILE *, size_t *, size_t *, const char[3], int);
    416 int	 fpurge(FILE *);
    417 void	 setbuffer(FILE *, char *, int);
    418 int	 setlinebuf(FILE *);
    419 int	 vasprintf(char ** __restrict, const char * __restrict,
    420     __va_list)
    421 		__printflike(2, 0);
    422 const char *fmtcheck(const char *, const char *)
    423 		__format_arg(2);
    424 __END_DECLS
    425 
    426 /*
    427  * Stdio function-access interface.
    428  */
    429 __BEGIN_DECLS
    430 FILE	*funopen(const void *,
    431     int (*)(void *, char *, int),
    432     int (*)(void *, const char *, int),
    433     off_t (*)(void *, off_t, int),
    434     int (*)(void *));
    435 FILE	*funopen2(const void *,
    436     ssize_t (*)(void *, void *, size_t),
    437     ssize_t (*)(void *, const void *, size_t),
    438     off_t (*)(void *, off_t, int),
    439     int (*)(void *),
    440     int (*)(void *));
    441 __END_DECLS
    442 #define	fropen(cookie, fn) funopen(cookie, fn, 0, 0, 0)
    443 #define	fwopen(cookie, fn) funopen(cookie, 0, fn, 0, 0)
    444 #define	fropen2(cookie, fn) funopen2(cookie, fn, 0, 0, 0, 0)
    445 #define	fwopen2(cookie, fn) funopen2(cookie, 0, fn, 0, 0, 0)
    446 #endif /* _NETBSD_SOURCE */
    447 
    448 /*
    449  * Functions internal to the implementation.
    450  */
    451 __BEGIN_DECLS
    452 int	__srget(FILE *);
    453 int	__swbuf(int, FILE *);
    454 __END_DECLS
    455 
    456 /*
    457  * The __sfoo macros are here so that we can
    458  * define function versions in the C library.
    459  */
    460 #define	__sgetc(p) (--(p)->_r < 0 ? __srget(p) : (int)(*(p)->_p++))
    461 #if defined(__GNUC__) && defined(__STDC__)
    462 static __inline int __sputc(int _c, FILE *_p) {
    463 	if (--_p->_w >= 0 || (_p->_w >= _p->_lbfsize && (char)_c != '\n'))
    464 		return *_p->_p++ = (unsigned char)_c;
    465 	else
    466 		return __swbuf(_c, _p);
    467 }
    468 #else
    469 /*
    470  * This has been tuned to generate reasonable code on the vax using pcc.
    471  */
    472 #define	__sputc(c, p) \
    473 	(--(p)->_w < 0 ? \
    474 		(p)->_w >= (p)->_lbfsize ? \
    475 			(*(p)->_p = (c)), *(p)->_p != '\n' ? \
    476 				(int)*(p)->_p++ : \
    477 				__swbuf('\n', p) : \
    478 			__swbuf((int)(c), p) : \
    479 		(*(p)->_p = (c), (int)*(p)->_p++))
    480 #endif
    481 
    482 #define	__sfeof(p)	(((p)->_flags & __SEOF) != 0)
    483 #define	__sferror(p)	(((p)->_flags & __SERR) != 0)
    484 #define	__sclearerr(p)	((void)((p)->_flags &= ~(__SERR|__SEOF)))
    485 #define	__sfileno(p)	\
    486     ((p)->_file == -1 ? -1 : (int)(unsigned short)(p)->_file)
    487 
    488 #if !defined(__lint__) && !defined(__cplusplus)
    489 #if !defined(_REENTRANT) && !defined(_PTHREADS)
    490 #define	feof(p)		__sfeof(p)
    491 #define	ferror(p)	__sferror(p)
    492 #define	clearerr(p)	__sclearerr(p)
    493 
    494 #define	getc(fp)	__sgetc(fp)
    495 #define putc(x, fp)	__sputc(x, fp)
    496 #endif /* !_REENTRANT && !_PTHREADS */
    497 
    498 #define	getchar()	getc(stdin)
    499 #define	putchar(x)	putc(x, stdout)
    500 
    501 #endif /* !__lint__ && !__cplusplus */
    502 
    503 #if (defined(_POSIX_C_SOURCE) || defined(_XOPEN_SOURCE) || \
    504     defined(_NETBSD_SOURCE)) && !defined(__cplusplus)
    505 #if !defined(_REENTRANT) && !defined(_PTHREADS)
    506 #define	fileno(p)	__sfileno(p)
    507 #endif /* !_REENTRANT && !_PTHREADS */
    508 #endif /* !_ANSI_SOURCE && !__cplusplus*/
    509 
    510 #if (_POSIX_C_SOURCE - 0) >= 200809L || defined(_NETBSD_SOURCE)
    511 __BEGIN_DECLS
    512 int	 vdprintf(int, const char * __restrict, __va_list)
    513 		__printflike(2, 0);
    514 int	 dprintf(int, const char * __restrict, ...)
    515 		__printflike(2, 3);
    516 __END_DECLS
    517 #endif /* (_POSIX_C_SOURCE - 0) >= 200809L || defined(_NETBSD_SOURCE) */
    518 
    519 #if (_POSIX_C_SOURCE - 0) >= 199506L || (_XOPEN_SOURCE - 0) >= 500 || \
    520     defined(_REENTRANT) || defined(_NETBSD_SOURCE) && !defined(__cplusplus)
    521 #define getc_unlocked(fp)	__sgetc(fp)
    522 #define putc_unlocked(x, fp)	__sputc(x, fp)
    523 
    524 #define getchar_unlocked()	getc_unlocked(stdin)
    525 #define putchar_unlocked(x)	putc_unlocked(x, stdout)
    526 #endif /* _POSIX_C_SOURCE >= 199506 || _XOPEN_SOURCE >= 500 || _REENTRANT... */
    527 
    528 #if (_POSIX_C_SOURCE - 0) >= 200809L || (_XOPEN_SOURCE - 0) >= 700 || \
    529     defined(_NETBSD_SOURCE)
    530 __BEGIN_DECLS
    531 FILE *fmemopen(void * __restrict, size_t, const char * __restrict);
    532 FILE *open_memstream(char **, size_t *);
    533 ssize_t	 getdelim(char ** __restrict, size_t * __restrict, int,
    534 	    FILE * __restrict);
    535 ssize_t	 getline(char ** __restrict, size_t * __restrict, FILE * __restrict);
    536 __END_DECLS
    537 #endif
    538 
    539 #if (_POSIX_C_SOURCE - 0) >= 200809L || defined(_NETBSD_SOURCE)
    540 #  ifndef __LOCALE_T_DECLARED
    541 typedef struct _locale		*locale_t;
    542 #  define __LOCALE_T_DECLARED
    543 #  endif
    544 __BEGIN_DECLS
    545 int	 fprintf_l(FILE * __restrict, locale_t, const char * __restrict, ...)
    546 		__printflike(3, 4);
    547 int	 vfprintf_l(FILE * __restrict, locale_t, const char * __restrict,
    548 		__va_list) __printflike(3, 0);
    549 int	 printf_l(locale_t, const char * __restrict, ...)
    550 		__printflike(2, 3);
    551 int	 vprintf_l(locale_t, const char * __restrict, __va_list)
    552 		__printflike(2, 0);
    553 int	 asprintf_l(char ** __restrict, locale_t, const char * __restrict, ...)
    554 		__printflike(3, 4);
    555 int	 vasprintf_l(char ** __restrict, locale_t, const char * __restrict,
    556     __va_list)
    557 		__printflike(3, 0);
    558 int	 vdprintf_l(int, locale_t, const char * __restrict, __va_list)
    559 		__printflike(3, 0);
    560 int	 dprintf_l(int, locale_t, const char * __restrict, ...)
    561 		__printflike(3, 4);
    562 int	 snprintf_l(char * __restrict, size_t, locale_t,
    563 		    const char * __restrict, ...) __printflike(4, 5);
    564 int	 vsnprintf_l(char * __restrict, size_t, locale_t,
    565 		     const char * __restrict, __va_list) __printflike(4, 0);
    566 #ifndef __AUDIT__
    567 int	 sprintf_l(char * __restrict, locale_t, const char * __restrict, ...)
    568 		   __printflike(3, 4);
    569 int	 vsprintf_l(char * __restrict, locale_t, const char * __restrict,
    570 		    __va_list) __printflike(3, 0);
    571 #endif
    572 
    573 int	 fscanf_l(FILE * __restrict, locale_t, const char * __restrict, ...)
    574     __scanflike(3, 4);
    575 int	 scanf_l(locale_t, const char * __restrict, ...)
    576     __scanflike(2, 3);
    577 int	 sscanf_l(const char * __restrict, locale_t,
    578     const char * __restrict, ...) __scanflike(3, 4);
    579 int	 vscanf_l(locale_t, const char * __restrict, __va_list)
    580     __scanflike(2, 0);
    581 int	 vscanf_l(locale_t, const char * __restrict, __va_list)
    582     __scanflike(2, 0);
    583 int	 vfscanf_l(FILE * __restrict, locale_t, const char * __restrict,
    584     __va_list) __scanflike(3, 0);
    585 int	 vsscanf_l(const char * __restrict, locale_t, const char * __restrict,
    586     __va_list) __scanflike(3, 0);
    587 #ifdef _NETBSD_SOURCE
    588 int	snprintf_ss(char *restrict, size_t, const char * __restrict, ...)
    589     __printflike(3, 4);
    590 int	vsnprintf_ss(char *restrict, size_t, const char * __restrict, __va_list)
    591     __printflike(3, 0);
    592 #endif
    593 __END_DECLS
    594 #endif
    595 
    596 #if _FORTIFY_SOURCE > 0
    597 #include <ssp/stdio.h>
    598 #endif
    599 
    600 #endif /* _STDIO_H_ */
    601