[apple/libc.git] / include / stdio.h

/*
 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this
 * file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
/*-
 * Copyright (c) 1990, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Chris Torek.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	@(#)stdio.h	8.5 (Berkeley) 4/29/95
 */

#ifndef	_STDIO_H_
#define	_STDIO_H_

#include <_types.h>
#include <sys/cdefs.h>

#ifndef _VA_LIST
#define _VA_LIST
/* DO NOT REMOVE THIS COMMENT: fixincludes needs to see:
 * __gnuc_va_list and include <stdarg.h> */
typedef __darwin_va_list	va_list;
#endif

#ifndef	_SIZE_T
#define	_SIZE_T
typedef	__darwin_size_t		size_t;
#endif

#ifndef NULL
#define NULL __DARWIN_NULL
#endif /* ! NULL */

#if !defined(_ANSI_SOURCE) && !defined(__STRICT_ANSI__)
typedef __darwin_off_t		fpos_t;
#else
typedef __int64_t		fpos_t;
#endif

#define	_FSTDIO			/* Define for new stdio with functions. */

/*
 * NB: to fit things in six character monocase externals, the stdio
 * code uses the prefix `__s' for stdio objects, typically followed
 * by a three-character attempt at a mnemonic.
 */

/* stdio buffers */
struct __sbuf {
	unsigned char	*_base;
	int		_size;
};

/* hold a buncha junk that would grow the ABI */
struct __sFILEX;

/*
 * stdio state variables.
 *
 * The following always hold:
 *
 *	if (_flags&(__SLBF|__SWR)) == (__SLBF|__SWR),
 *		_lbfsize is -_bf._size, else _lbfsize is 0
 *	if _flags&__SRD, _w is 0
 *	if _flags&__SWR, _r is 0
 *
 * This ensures that the getc and putc macros (or inline functions) never
 * try to write or read from a file that is in `read' or `write' mode.
 * (Moreover, they can, and do, automatically switch from read mode to
 * write mode, and back, on "r+" and "w+" files.)
 *
 * _lbfsize is used only to make the inline line-buffered output stream
 * code as compact as possible.
 *
 * _ub, _up, and _ur are used when ungetc() pushes back more characters
 * than fit in the current _bf, or when ungetc() pushes back a character
 * that does not match the previous one in _bf.  When this happens,
 * _ub._base becomes non-nil (i.e., a stream has ungetc() data iff
 * _ub._base!=NULL) and _up and _ur save the current values of _p and _r.
 *
 * NB: see WARNING above before changing the layout of this structure!
 */
typedef	struct __sFILE {
	unsigned char *_p;	/* current position in (some) buffer */
	int	_r;		/* read space left for getc() */
	int	_w;		/* write space left for putc() */
	short	_flags;		/* flags, below; this FILE is free if 0 */
	short	_file;		/* fileno, if Unix descriptor, else -1 */
	struct	__sbuf _bf;	/* the buffer (at least 1 byte, if !NULL) */
	int	_lbfsize;	/* 0 or -_bf._size, for inline putc */

	/* operations */
	void	*_cookie;	/* cookie passed to io functions */
	int	(*_close)(void *);
	int	(*_read) (void *, char *, int);
	fpos_t	(*_seek) (void *, fpos_t, int);
	int	(*_write)(void *, const char *, int);

	/* separate buffer for long sequences of ungetc() */
	struct	__sbuf _ub;	/* ungetc buffer */
	struct __sFILEX *_extra; /* additions to FILE to not break ABI */
	int	_ur;		/* saved _r when _r is counting ungetc data */

	/* tricks to meet minimum requirements even when malloc() fails */
	unsigned char _ubuf[3];	/* guarantee an ungetc() buffer */
	unsigned char _nbuf[1];	/* guarantee a getc() buffer */

	/* separate buffer for fgetln() when line crosses buffer boundary */
	struct	__sbuf _lb;	/* buffer for fgetln() */

	/* Unix stdio files get aligned to block boundaries on fseek() */
	int	_blksize;	/* stat.st_blksize (may be != _bf._size) */
	fpos_t	_offset;	/* current lseek offset (see WARNING) */
} FILE;

__BEGIN_DECLS
#if __DARWIN_UNIX03
extern FILE *__stdinp;
extern FILE *__stdoutp;
extern FILE *__stderrp;
#else /* !__DARWIN_UNIX03 */
extern FILE __sF[];
#endif /* __DARWIN_UNIX03 */
__END_DECLS

#define	__SLBF	0x0001		/* line buffered */
#define	__SNBF	0x0002		/* unbuffered */
#define	__SRD	0x0004		/* OK to read */
#define	__SWR	0x0008		/* OK to write */
	/* RD and WR are never simultaneously asserted */
#define	__SRW	0x0010		/* open for reading & writing */
#define	__SEOF	0x0020		/* found EOF */
#define	__SERR	0x0040		/* found error */
#define	__SMBF	0x0080		/* _buf is from malloc */
#define	__SAPP	0x0100		/* fdopen()ed in append mode */
#define	__SSTR	0x0200		/* this is an sprintf/snprintf string */
#define	__SOPT	0x0400		/* do fseek() optimisation */
#define	__SNPT	0x0800		/* do not do fseek() optimisation */
#define	__SOFF	0x1000		/* set iff _offset is in fact correct */
#define	__SMOD	0x2000		/* true => fgetln modified _p text */
#define __SALC  0x4000		/* allocate string space dynamically */
#define __SIGN  0x8000		/* ignore this file in _fwalk */

/*
 * The following three definitions are for ANSI C, which took them
 * from System V, which brilliantly took internal interface macros and
 * made them official arguments to setvbuf(), without renaming them.
 * Hence, these ugly _IOxxx names are *supposed* to appear in user code.
 *
 * Although numbered as their counterparts above, the implementation
 * does not rely on this.
 */
#define	_IOFBF	0		/* setvbuf should set fully buffered */
#define	_IOLBF	1		/* setvbuf should set line buffered */
#define	_IONBF	2		/* setvbuf should set unbuffered */

#define	BUFSIZ	1024		/* size of buffer used by setbuf */
#define	EOF	(-1)

/*
 * FOPEN_MAX is a minimum maximum, and is the number of streams that
 * stdio can provide without attempting to allocate further resources
 * (which could fail).  Do not use this for anything.
 */
				/* must be == _POSIX_STREAM_MAX <limits.h> */
#define	FOPEN_MAX	20	/* must be <= OPEN_MAX <sys/syslimits.h> */
#define	FILENAME_MAX	1024	/* must be <= PATH_MAX <sys/syslimits.h> */

/* System V/ANSI C; this is the wrong way to do this, do *not* use these. */
#ifndef _ANSI_SOURCE
#define	P_tmpdir	"/var/tmp/"
#endif
#define	L_tmpnam	1024	/* XXX must be == PATH_MAX */
#define	TMP_MAX		308915776

#ifndef SEEK_SET
#define	SEEK_SET	0	/* set file offset to offset */
#endif
#ifndef SEEK_CUR
#define	SEEK_CUR	1	/* set file offset to current plus offset */
#endif
#ifndef SEEK_END
#define	SEEK_END	2	/* set file offset to EOF plus offset */
#endif

#if __DARWIN_UNIX03
#define	stdin	__stdinp
#define	stdout	__stdoutp
#define	stderr	__stderrp
#else /* !__DARWIN_UNIX03 */
#define stdin	(&__sF[0])
#define stdout	(&__sF[1])
#define stderr	(&__sF[2])
#endif /* __DARWIN_UNIX03 */

/*
 * Functions defined in ANSI C standard.
 */
__BEGIN_DECLS
void	 clearerr(FILE *);
int	 fclose(FILE *);
int	 feof(FILE *);
int	 ferror(FILE *);
int	 fflush(FILE *);
int	 fgetc(FILE *);
int	 fgetpos(FILE * __restrict, fpos_t *);
char	*fgets(char * __restrict, int, FILE *);
FILE	*fopen(const char * __restrict, const char * __restrict);
int	 fprintf(FILE * __restrict, const char * __restrict, ...) __DARWIN_LDBL_COMPAT(fprintf);
int	 fputc(int, FILE *);
int	 fputs(const char * __restrict, FILE * __restrict);
size_t	 fread(void * __restrict, size_t, size_t, FILE * __restrict);
FILE	*freopen(const char * __restrict, const char * __restrict,
	    FILE * __restrict) __DARWIN_ALIAS(freopen);
int	 fscanf(FILE * __restrict, const char * __restrict, ...) __DARWIN_LDBL_COMPAT(fscanf);
int	 fseek(FILE *, long, int);
int	 fsetpos(FILE *, const fpos_t *);
long	 ftell(FILE *);
size_t	 fwrite(const void * __restrict, size_t, size_t, FILE * __restrict) __DARWIN_ALIAS(fwrite);
int	 getc(FILE *);
int	 getchar(void);
char	*gets(char *);
#if !defined(_ANSI_SOURCE) && !defined(_POSIX_C_SOURCE)
extern __const int sys_nerr;		/* perror(3) external variables */
extern __const char *__const sys_errlist[];
#endif
void	 perror(const char *);
int	 printf(const char * __restrict, ...) __DARWIN_LDBL_COMPAT(printf);
int	 putc(int, FILE *);
int	 putchar(int);
int	 puts(const char *);
int	 remove(const char *);
int	 rename (const char *, const char *);
void	 rewind(FILE *);
int	 scanf(const char * __restrict, ...) __DARWIN_LDBL_COMPAT(scanf);
void	 setbuf(FILE * __restrict, char * __restrict);
int	 setvbuf(FILE * __restrict, char * __restrict, int, size_t);
int	 sprintf(char * __restrict, const char * __restrict, ...) __DARWIN_LDBL_COMPAT(sprintf);
int	 sscanf(const char * __restrict, const char * __restrict, ...) __DARWIN_LDBL_COMPAT(sscanf);
FILE	*tmpfile(void);
char	*tmpnam(char *);
int	 ungetc(int, FILE *);
int	 vfprintf(FILE * __restrict, const char * __restrict, va_list) __DARWIN_LDBL_COMPAT(vfprintf);
int	 vprintf(const char * __restrict, va_list) __DARWIN_LDBL_COMPAT(vprintf);
int	 vsprintf(char * __restrict, const char * __restrict, va_list) __DARWIN_LDBL_COMPAT(vsprintf);
#if !defined(_ANSI_SOURCE) && !defined(_POSIX_C_SOURCE)
int	 asprintf(char **, const char *, ...) __DARWIN_LDBL_COMPAT(asprintf);
int	 vasprintf(char **, const char *, va_list) __DARWIN_LDBL_COMPAT(vasprintf);
#endif
__END_DECLS

/*
 * Functions defined in POSIX 1003.1.
 */
#ifndef _ANSI_SOURCE
#define	L_cuserid	9	/* size for cuserid(); UT_NAMESIZE + 1 */
#define	L_ctermid	1024	/* size for ctermid(); PATH_MAX */

__BEGIN_DECLS
char	*ctermid(char *);
#ifndef _POSIX_C_SOURCE
char	*ctermid_r(char *);
#endif /* not POSIX */
FILE	*fdopen(int, const char *);
#ifndef _POSIX_C_SOURCE
char	*fgetln(FILE *, size_t *);
#endif /* not POSIX */
int	 fileno(FILE *);
void	 flockfile(FILE *);
#ifndef _POSIX_C_SOURCE
__const char 
	*fmtcheck(const char *, const char *);
int	 fpurge(FILE *);
#endif /* not POSIX */
int	 fseeko(FILE *, fpos_t, int);
fpos_t	 ftello(FILE *);
int	 ftrylockfile(FILE *);
void	 funlockfile(FILE *);
int	 getc_unlocked(FILE *);
int	 getchar_unlocked(void);
#ifndef _POSIX_C_SOURCE
int	 getw(FILE *);
#endif /* not POSIX */
int	 pclose(FILE *);
FILE	*popen(const char *, const char *);
int	 putc_unlocked(int, FILE *);
int	 putchar_unlocked(int);
#ifndef _POSIX_C_SOURCE
int	 putw(int, FILE *);
void	 setbuffer(FILE *, char *, int);
int	 setlinebuf(FILE *);
#endif /* not POSIX */
int	 snprintf(char * __restrict, size_t, const char * __restrict, ...) __DARWIN_LDBL_COMPAT(snprintf);
char	*tempnam(const char *, const char *);
int	 vfscanf(FILE * __restrict, const char * __restrict, va_list) __DARWIN_LDBL_COMPAT(vfscanf);
int	 vscanf(const char * __restrict, va_list) __DARWIN_LDBL_COMPAT(vscanf);
int	 vsnprintf(char * __restrict, size_t, const char * __restrict, va_list) __DARWIN_LDBL_COMPAT(vsnprintf);
int	 vsscanf(const char * __restrict, const char * __restrict, va_list) __DARWIN_LDBL_COMPAT(vsscanf);
#ifndef _POSIX_C_SOURCE
FILE	*zopen(const char *, const char *, int);
#endif /* not POSIX */
__END_DECLS

/*
 * Stdio function-access interface.
 */
#ifndef _POSIX_C_SOURCE
__BEGIN_DECLS
FILE	*funopen(const void *,
		int (*)(void *, char *, int),
		int (*)(void *, const char *, int),
		fpos_t (*)(void *, fpos_t, int),
		int (*)(void *));
__END_DECLS
#define	fropen(cookie, fn) funopen(cookie, fn, 0, 0, 0)
#define	fwopen(cookie, fn) funopen(cookie, 0, fn, 0, 0)
#endif /* not POSIX */
#endif /* not ANSI */

/*
 * Functions internal to the implementation.
 */
__BEGIN_DECLS
int	__srget(FILE *);
int	__svfscanf(FILE *, const char *, va_list) __DARWIN_LDBL_COMPAT(__svfscanf);
int	__swbuf(int, FILE *);
__END_DECLS

/*
 * The __sfoo macros are here so that we can 
 * define function versions in the C library.
 */
#define	__sgetc(p) (--(p)->_r < 0 ? __srget(p) : (int)(*(p)->_p++))
#if defined(__GNUC__) && defined(__STDC__)
static __inline int __sputc(int _c, FILE *_p) {
	if (--_p->_w >= 0 || (_p->_w >= _p->_lbfsize && (char)_c != '\n'))
		return (*_p->_p++ = _c);
	else
		return (__swbuf(_c, _p));
}
#else
/*
 * This has been tuned to generate reasonable code on the vax using pcc.
 */
#define	__sputc(c, p) \
	(--(p)->_w < 0 ? \
		(p)->_w >= (p)->_lbfsize ? \
			(*(p)->_p = (c)), *(p)->_p != '\n' ? \
				(int)*(p)->_p++ : \
				__swbuf('\n', p) : \
			__swbuf((int)(c), p) : \
		(*(p)->_p = (c), (int)*(p)->_p++))
#endif

#define	__sfeof(p)	(((p)->_flags & __SEOF) != 0)
#define	__sferror(p)	(((p)->_flags & __SERR) != 0)
#define	__sclearerr(p)	((void)((p)->_flags &= ~(__SERR|__SEOF)))
#define	__sfileno(p)	((p)->_file)

#ifndef _ANSI_SOURCE
#ifndef _POSIX_C_SOURCE
#define	feof_unlocked(p)	__sfeof(p)
#define	ferror_unlocked(p)	__sferror(p)
#define	clearerr_unlocked(p)	__sclearerr(p)
#define	fileno_unlocked(p)	__sfileno(p)
#endif /* not POSIX */

#ifndef lint
#define	getc_unlocked(fp)	__sgetc(fp)
#define putc_unlocked(x, fp)	__sputc(x, fp)
#endif /* lint */

#define	getchar_unlocked()	getc_unlocked(stdin)
#define	putchar_unlocked(x)	putc_unlocked(x, stdout)
#endif /* not ANSI */

#ifdef _USE_EXTENDED_LOCALES_
#include <xlocale/_stdio.h>
#endif /* _USE_EXTENDED_LOCALES_ */

#endif /* _STDIO_H_ */
Commit	Line	Data
5b2abdfb A	1	/*
	2	* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
734aad71 A	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
5b2abdfb A	15	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
5b2abdfb A	16	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
734aad71 A	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.
5b2abdfb A	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
59e0d9fe	64	#include <_types.h>
5b2abdfb A	65	#include <sys/cdefs.h>
5b2abdfb A	66
3d9156a7 A	67	#ifndef _VA_LIST
	68	#define _VA_LIST
	69	/* DO NOT REMOVE THIS COMMENT: fixincludes needs to see:
	70	* __gnuc_va_list and include <stdarg.h> */
	71	typedef __darwin_va_list va_list;
	72	#endif
	73
	74	#ifndef _SIZE_T
	75	#define _SIZE_T
	76	typedef __darwin_size_t size_t;
5b2abdfb A	77	#endif
	78
	79	#ifndef NULL
3d9156a7	80	#define NULL __DARWIN_NULL
59e0d9fe	81	#endif /* ! NULL */
5b2abdfb	82
5b2abdfb	83	#if !defined(_ANSI_SOURCE) && !defined(__STRICT_ANSI__)
3d9156a7	84	typedef __darwin_off_t fpos_t;
5b2abdfb	85	#else
3d9156a7	86	typedef __int64_t fpos_t;
5b2abdfb A	87	#endif
	88
	89	#define _FSTDIO /* Define for new stdio with functions. */
	90
	91	/*
	92	* NB: to fit things in six character monocase externals, the stdio
	93	* code uses the prefix `__s' for stdio objects, typically followed
	94	* by a three-character attempt at a mnemonic.
	95	*/
	96
	97	/* stdio buffers */
	98	struct __sbuf {
3d9156a7 A	99	unsigned char *_base;
3d9156a7 A	100	int _size;
5b2abdfb A	101	};
5b2abdfb A	102
9385eb3d A	103	/* hold a buncha junk that would grow the ABI */
	104	struct __sFILEX;
	105
5b2abdfb A	106	/*
	107	* stdio state variables.
	108	*
	109	* The following always hold:
	110	*
	111	* if (_flags&(__SLBF\|__SWR)) == (__SLBF\|__SWR),
	112	* _lbfsize is -_bf._size, else _lbfsize is 0
	113	* if _flags&__SRD, _w is 0
	114	* if _flags&__SWR, _r is 0
	115	*
	116	* This ensures that the getc and putc macros (or inline functions) never
	117	* try to write or read from a file that is in `read' or `write' mode.
	118	* (Moreover, they can, and do, automatically switch from read mode to
	119	* write mode, and back, on "r+" and "w+" files.)
	120	*
	121	* _lbfsize is used only to make the inline line-buffered output stream
	122	* code as compact as possible.
	123	*
	124	* _ub, _up, and _ur are used when ungetc() pushes back more characters
	125	* than fit in the current _bf, or when ungetc() pushes back a character
	126	* that does not match the previous one in _bf. When this happens,
	127	* _ub._base becomes non-nil (i.e., a stream has ungetc() data iff
	128	* _ub._base!=NULL) and _up and _ur save the current values of _p and _r.
	129	*
	130	* NB: see WARNING above before changing the layout of this structure!
	131	*/
	132	typedef struct __sFILE {
	133	unsigned char _p; / current position in (some) buffer */
	134	int _r; /* read space left for getc() */
	135	int _w; /* write space left for putc() */
	136	short _flags; /* flags, below; this FILE is free if 0 */
	137	short _file; /* fileno, if Unix descriptor, else -1 */
	138	struct __sbuf _bf; /* the buffer (at least 1 byte, if !NULL) */
	139	int _lbfsize; /* 0 or -_bf._size, for inline putc */
	140
	141	/* operations */
	142	void _cookie; / cookie passed to io functions */
9385eb3d A	143	int (_close)(void );
	144	int (_read) (void , char *, int);
	145	fpos_t (_seek) (void , fpos_t, int);
	146	int (_write)(void , const char *, int);
5b2abdfb A	147
	148	/* separate buffer for long sequences of ungetc() */
	149	struct __sbuf _ub; /* ungetc buffer */
9385eb3d	150	struct __sFILEX _extra; / additions to FILE to not break ABI */
5b2abdfb A	151	int _ur; /* saved _r when _r is counting ungetc data */
	152
	153	/* tricks to meet minimum requirements even when malloc() fails */
	154	unsigned char _ubuf[3]; /* guarantee an ungetc() buffer */
	155	unsigned char _nbuf[1]; /* guarantee a getc() buffer */
	156
	157	/* separate buffer for fgetln() when line crosses buffer boundary */
	158	struct __sbuf _lb; /* buffer for fgetln() */
	159
	160	/* Unix stdio files get aligned to block boundaries on fseek() */
	161	int _blksize; /* stat.st_blksize (may be != _bf._size) */
	162	fpos_t _offset; /* current lseek offset (see WARNING) */
	163	} FILE;
	164
	165	__BEGIN_DECLS
3d9156a7 A	166	#if __DARWIN_UNIX03
	167	extern FILE *__stdinp;
	168	extern FILE *__stdoutp;
	169	extern FILE *__stderrp;
	170	#else /* !__DARWIN_UNIX03 */
5b2abdfb	171	extern FILE __sF[];
3d9156a7	172	#endif /* __DARWIN_UNIX03 */
5b2abdfb A	173	__END_DECLS
	174
	175	#define __SLBF 0x0001 /* line buffered */
	176	#define __SNBF 0x0002 /* unbuffered */
	177	#define __SRD 0x0004 /* OK to read */
	178	#define __SWR 0x0008 /* OK to write */
	179	/* RD and WR are never simultaneously asserted */
	180	#define __SRW 0x0010 /* open for reading & writing */
	181	#define __SEOF 0x0020 /* found EOF */
	182	#define __SERR 0x0040 /* found error */
	183	#define __SMBF 0x0080 /* _buf is from malloc */
	184	#define __SAPP 0x0100 /* fdopen()ed in append mode */
	185	#define __SSTR 0x0200 /* this is an sprintf/snprintf string */
	186	#define __SOPT 0x0400 /* do fseek() optimisation */
	187	#define __SNPT 0x0800 /* do not do fseek() optimisation */
	188	#define __SOFF 0x1000 /* set iff _offset is in fact correct */
	189	#define __SMOD 0x2000 /* true => fgetln modified _p text */
	190	#define __SALC 0x4000 /* allocate string space dynamically */
9385eb3d	191	#define __SIGN 0x8000 /* ignore this file in _fwalk */
5b2abdfb A	192
	193	/*
	194	* The following three definitions are for ANSI C, which took them
	195	* from System V, which brilliantly took internal interface macros and
	196	* made them official arguments to setvbuf(), without renaming them.
	197	* Hence, these ugly _IOxxx names are supposed to appear in user code.
	198	*
	199	* Although numbered as their counterparts above, the implementation
	200	* does not rely on this.
	201	*/
	202	#define _IOFBF 0 /* setvbuf should set fully buffered */
	203	#define _IOLBF 1 /* setvbuf should set line buffered */
	204	#define _IONBF 2 /* setvbuf should set unbuffered */
	205
	206	#define BUFSIZ 1024 /* size of buffer used by setbuf */
	207	#define EOF (-1)
	208
	209	/*
	210	* FOPEN_MAX is a minimum maximum, and is the number of streams that
	211	* stdio can provide without attempting to allocate further resources
	212	* (which could fail). Do not use this for anything.
	213	*/
	214	/* must be == _POSIX_STREAM_MAX <limits.h> */
	215	#define FOPEN_MAX 20 /* must be <= OPEN_MAX <sys/syslimits.h> */
	216	#define FILENAME_MAX 1024 /* must be <= PATH_MAX <sys/syslimits.h> */
	217
	218	/* System V/ANSI C; this is the wrong way to do this, do not use these. */
	219	#ifndef _ANSI_SOURCE
	220	#define P_tmpdir "/var/tmp/"
	221	#endif
	222	#define L_tmpnam 1024 /* XXX must be == PATH_MAX */
	223	#define TMP_MAX 308915776
	224
	225	#ifndef SEEK_SET
	226	#define SEEK_SET 0 /* set file offset to offset */
	227	#endif
	228	#ifndef SEEK_CUR
	229	#define SEEK_CUR 1 /* set file offset to current plus offset */
	230	#endif
	231	#ifndef SEEK_END
	232	#define SEEK_END 2 /* set file offset to EOF plus offset */
	233	#endif
	234
3d9156a7 A	235	#if __DARWIN_UNIX03
	236	#define stdin __stdinp
	237	#define stdout __stdoutp
	238	#define stderr __stderrp
	239	#else /* !__DARWIN_UNIX03 */
59e0d9fe A	240	#define stdin (&__sF[0])
	241	#define stdout (&__sF[1])
	242	#define stderr (&__sF[2])
3d9156a7	243	#endif /* __DARWIN_UNIX03 */
5b2abdfb A	244
	245	/*
	246	* Functions defined in ANSI C standard.
	247	*/
	248	__BEGIN_DECLS
9385eb3d A	249	void clearerr(FILE *);
	250	int fclose(FILE *);
	251	int feof(FILE *);
	252	int ferror(FILE *);
	253	int fflush(FILE *);
	254	int fgetc(FILE *);
59e0d9fe A	255	int fgetpos(FILE * __restrict, fpos_t *);
	256	char fgets(char __restrict, int, FILE *);
	257	FILE fopen(const char __restrict, const char * __restrict);
3d9156a7	258	int fprintf(FILE * __restrict, const char * __restrict, ...) __DARWIN_LDBL_COMPAT(fprintf);
9385eb3d	259	int fputc(int, FILE *);
59e0d9fe A	260	int fputs(const char * __restrict, FILE * __restrict);
	261	size_t fread(void * __restrict, size_t, size_t, FILE * __restrict);
	262	FILE freopen(const char __restrict, const char * __restrict,
3d9156a7 A	263	FILE * __restrict) __DARWIN_ALIAS(freopen);
3d9156a7 A	264	int fscanf(FILE * __restrict, const char * __restrict, ...) __DARWIN_LDBL_COMPAT(fscanf);
9385eb3d A	265	int fseek(FILE *, long, int);
	266	int fsetpos(FILE , const fpos_t );
	267	long ftell(FILE *);
3d9156a7	268	size_t fwrite(const void * __restrict, size_t, size_t, FILE * __restrict) __DARWIN_ALIAS(fwrite);
9385eb3d A	269	int getc(FILE *);
	270	int getchar(void);
	271	char gets(char );
3d9156a7	272	#if !defined(_ANSI_SOURCE) && !defined(_POSIX_C_SOURCE)
5b2abdfb A	273	extern __const int sys_nerr; /* perror(3) external variables */
	274	extern __const char *__const sys_errlist[];
	275	#endif
9385eb3d	276	void perror(const char *);
3d9156a7	277	int printf(const char * __restrict, ...) __DARWIN_LDBL_COMPAT(printf);
9385eb3d A	278	int putc(int, FILE *);
	279	int putchar(int);
	280	int puts(const char *);
	281	int remove(const char *);
	282	int rename (const char , const char );
	283	void rewind(FILE *);
3d9156a7	284	int scanf(const char * __restrict, ...) __DARWIN_LDBL_COMPAT(scanf);
59e0d9fe A	285	void setbuf(FILE * __restrict, char * __restrict);
59e0d9fe A	286	int setvbuf(FILE * __restrict, char * __restrict, int, size_t);
3d9156a7 A	287	int sprintf(char * __restrict, const char * __restrict, ...) __DARWIN_LDBL_COMPAT(sprintf);
3d9156a7 A	288	int sscanf(const char * __restrict, const char * __restrict, ...) __DARWIN_LDBL_COMPAT(sscanf);
9385eb3d A	289	FILE *tmpfile(void);
	290	char tmpnam(char );
	291	int ungetc(int, FILE *);
3d9156a7 A	292	int vfprintf(FILE * __restrict, const char * __restrict, va_list) __DARWIN_LDBL_COMPAT(vfprintf);
	293	int vprintf(const char * __restrict, va_list) __DARWIN_LDBL_COMPAT(vprintf);
	294	int vsprintf(char * __restrict, const char * __restrict, va_list) __DARWIN_LDBL_COMPAT(vsprintf);
	295	#if !defined(_ANSI_SOURCE) && !defined(_POSIX_C_SOURCE)
	296	int asprintf(char *, const char , ...) __DARWIN_LDBL_COMPAT(asprintf);
	297	int vasprintf(char *, const char , va_list) __DARWIN_LDBL_COMPAT(vasprintf);
59e0d9fe	298	#endif
5b2abdfb A	299	__END_DECLS
	300
	301	/*
	302	* Functions defined in POSIX 1003.1.
	303	*/
	304	#ifndef _ANSI_SOURCE
	305	#define L_cuserid 9 /* size for cuserid(); UT_NAMESIZE + 1 */
	306	#define L_ctermid 1024 /* size for ctermid(); PATH_MAX */
	307
	308	__BEGIN_DECLS
9385eb3d	309	char ctermid(char );
3d9156a7	310	#ifndef _POSIX_C_SOURCE
9385eb3d	311	char ctermid_r(char );
59e0d9fe	312	#endif /* not POSIX */
9385eb3d	313	FILE fdopen(int, const char );
3d9156a7	314	#ifndef _POSIX_C_SOURCE
9385eb3d	315	char fgetln(FILE , size_t *);
59e0d9fe A	316	#endif /* not POSIX */
59e0d9fe A	317	int fileno(FILE *);
9385eb3d	318	void flockfile(FILE *);
3d9156a7	319	#ifndef _POSIX_C_SOURCE
9385eb3d A	320	__const char
	321	fmtcheck(const char , const char *);
	322	int fpurge(FILE *);
59e0d9fe	323	#endif /* not POSIX */
9385eb3d A	324	int fseeko(FILE *, fpos_t, int);
	325	fpos_t ftello(FILE *);
	326	int ftrylockfile(FILE *);
	327	void funlockfile(FILE *);
	328	int getc_unlocked(FILE *);
	329	int getchar_unlocked(void);
3d9156a7	330	#ifndef _POSIX_C_SOURCE
9385eb3d	331	int getw(FILE *);
59e0d9fe	332	#endif /* not POSIX */
9385eb3d A	333	int pclose(FILE *);
	334	FILE popen(const char , const char *);
	335	int putc_unlocked(int, FILE *);
	336	int putchar_unlocked(int);
3d9156a7	337	#ifndef _POSIX_C_SOURCE
9385eb3d A	338	int putw(int, FILE *);
	339	void setbuffer(FILE , char , int);
	340	int setlinebuf(FILE *);
59e0d9fe	341	#endif /* not POSIX */
3d9156a7	342	int snprintf(char * __restrict, size_t, const char * __restrict, ...) __DARWIN_LDBL_COMPAT(snprintf);
9385eb3d	343	char tempnam(const char , const char *);
3d9156a7 A	344	int vfscanf(FILE * __restrict, const char * __restrict, va_list) __DARWIN_LDBL_COMPAT(vfscanf);
	345	int vscanf(const char * __restrict, va_list) __DARWIN_LDBL_COMPAT(vscanf);
	346	int vsnprintf(char * __restrict, size_t, const char * __restrict, va_list) __DARWIN_LDBL_COMPAT(vsnprintf);
	347	int vsscanf(const char * __restrict, const char * __restrict, va_list) __DARWIN_LDBL_COMPAT(vsscanf);
	348	#ifndef _POSIX_C_SOURCE
9385eb3d	349	FILE zopen(const char , const char *, int);
59e0d9fe	350	#endif /* not POSIX */
5b2abdfb A	351	__END_DECLS
5b2abdfb A	352
5b2abdfb A	353	/*
	354	* Stdio function-access interface.
	355	*/
3d9156a7	356	#ifndef _POSIX_C_SOURCE
5b2abdfb	357	__BEGIN_DECLS
9385eb3d	358	FILE funopen(const void ,
5b2abdfb A	359	int ()(void , char *, int),
	360	int ()(void , const char *, int),
	361	fpos_t ()(void , fpos_t, int),
9385eb3d	362	int ()(void ));
5b2abdfb A	363	__END_DECLS
	364	#define fropen(cookie, fn) funopen(cookie, fn, 0, 0, 0)
	365	#define fwopen(cookie, fn) funopen(cookie, 0, fn, 0, 0)
59e0d9fe A	366	#endif /* not POSIX */
59e0d9fe A	367	#endif /* not ANSI */
5b2abdfb A	368
	369	/*
	370	* Functions internal to the implementation.
	371	*/
	372	__BEGIN_DECLS
9385eb3d	373	int __srget(FILE *);
3d9156a7	374	int __svfscanf(FILE , const char , va_list) __DARWIN_LDBL_COMPAT(__svfscanf);
9385eb3d	375	int __swbuf(int, FILE *);
5b2abdfb A	376	__END_DECLS
	377
	378	/*
	379	* The __sfoo macros are here so that we can
	380	* define function versions in the C library.
	381	*/
	382	#define __sgetc(p) (--(p)->_r < 0 ? __srget(p) : (int)(*(p)->_p++))
	383	#if defined(__GNUC__) && defined(__STDC__)
	384	static __inline int __sputc(int _c, FILE *_p) {
	385	if (--_p->_w >= 0 \|\| (_p->_w >= _p->_lbfsize && (char)_c != '\n'))
	386	return (*_p->_p++ = _c);
	387	else
	388	return (__swbuf(_c, _p));
	389	}
	390	#else
	391	/*
	392	* This has been tuned to generate reasonable code on the vax using pcc.
	393	*/
	394	#define __sputc(c, p) \
	395	(--(p)->_w < 0 ? \
	396	(p)->_w >= (p)->_lbfsize ? \
	397	((p)->_p = (c)), (p)->_p != '\n' ? \
	398	(int)*(p)->_p++ : \
	399	__swbuf('\n', p) : \
	400	__swbuf((int)(c), p) : \
	401	((p)->_p = (c), (int)(p)->_p++))
	402	#endif
	403
	404	#define __sfeof(p) (((p)->_flags & __SEOF) != 0)
	405	#define __sferror(p) (((p)->_flags & __SERR) != 0)
	406	#define __sclearerr(p) ((void)((p)->_flags &= ~(__SERR\|__SEOF)))
	407	#define __sfileno(p) ((p)->_file)
	408
59e0d9fe	409	#ifndef _ANSI_SOURCE
3d9156a7	410	#ifndef _POSIX_C_SOURCE
9385eb3d A	411	#define feof_unlocked(p) __sfeof(p)
	412	#define ferror_unlocked(p) __sferror(p)
	413	#define clearerr_unlocked(p) __sclearerr(p)
9385eb3d	414	#define fileno_unlocked(p) __sfileno(p)
59e0d9fe	415	#endif /* not POSIX */
5b2abdfb A	416
5b2abdfb A	417	#ifndef lint
9385eb3d A	418	#define getc_unlocked(fp) __sgetc(fp)
9385eb3d A	419	#define putc_unlocked(x, fp) __sputc(x, fp)
5b2abdfb A	420	#endif /* lint */
5b2abdfb A	421
9385eb3d A	422	#define getchar_unlocked() getc_unlocked(stdin)
9385eb3d A	423	#define putchar_unlocked(x) putc_unlocked(x, stdout)
59e0d9fe A	424	#endif /* not ANSI */
59e0d9fe A	425
3d9156a7 A	426	#ifdef _USE_EXTENDED_LOCALES_
	427	#include <xlocale/_stdio.h>
	428	#endif /* _USE_EXTENDED_LOCALES_ */
	429
5b2abdfb	430	#endif /* _STDIO_H_ */