[unix-history] / usr / src / include / stdio.h

/*-
 * Copyright (c) 1990 The Regents of the University of California.
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Chris Torek.
 *
 * %sccs.include.redist.c%
 *
 *	@(#)stdio.h	5.15 (Berkeley) %G%
 */

#ifndef	_STDIO_H_
#define	_STDIO_H_

#include <sys/cdefs.h>

#include <machine/ansi.h>
#ifdef	_SIZE_T_
typedef	_SIZE_T_	size_t;
#undef	_SIZE_T_
#endif

#ifndef NULL
#define	NULL	0
#endif

typedef long fpos_t;		/* Must match off_t <sys/types.h> */

#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;
};

/*
 * 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.
 */
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) __P((void *));
	int	(*_read)  __P((void *, char *, int));
	fpos_t	(*_seek)  __P((void *, fpos_t, int));
	int	(*_write) __P((void *, const char *, int));

	/* separate buffer for long sequences of ungetc() */
	struct	__sbuf _ub;	/* ungetc buffer */
	unsigned char *_up;	/* saved _p when _p is doing ungetc data */
	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 fgetline() when line crosses buffer boundary */
	struct	__sbuf _lb;	/* buffer for fgetline() */

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

__BEGIN_DECLS
extern FILE __sF[];
__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 => fgetline modified _p text */

/*
 * 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 should be the number of descriptors
 * that the kernel can provide without allocation of a resource that can
 * fail without the process sleeping.  Do not use this for anything.
 */
#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

#define	stdin	(&__sF[0])
#define	stdout	(&__sF[1])
#define	stderr	(&__sF[2])

/*
 * Functions defined in ANSI C standard.
 */
__BEGIN_DECLS
void	 clearerr __P((FILE *));
int	 fclose __P((FILE *));
int	 feof __P((FILE *));
int	 ferror __P((FILE *));
int	 fflush __P((FILE *));
int	 fgetc __P((FILE *));
int	 fgetpos __P((FILE *, fpos_t *));
char	*fgets __P((char *, size_t, FILE *));
FILE	*fopen __P((const char *, const char *));
int	 fprintf __P((FILE *, const char *, ...));
int	 fputc __P((int, FILE *));
int	 fputs __P((const char *, FILE *));
int	 fread __P((void *, size_t, size_t, FILE *));
FILE	*freopen __P((const char *, const char *, FILE *));
int	 fscanf __P((FILE *, const char *, ...));
int	 fseek __P((FILE *, long, int));
int	 fsetpos __P((FILE *, const fpos_t *));
long	 ftell __P((const FILE *));
int	 fwrite __P((const void *, size_t, size_t, FILE *));
int	 getc __P((FILE *));
int	 getchar __P((void));
char	*gets __P((char *));
void	 perror __P((const char *));
int	 printf __P((const char *, ...));
int	 putc __P((int, FILE *));
int	 putchar __P((int));
int	 puts __P((const char *));
int	 remove __P((const char *));
int	 rename  __P((const char *, const char *));
void	 rewind __P((FILE *));
int	 scanf __P((const char *, ...));
void	 setbuf __P((FILE *, char *));
int	 setvbuf __P((FILE *, char *, int, size_t));
int	 sprintf __P((char *, const char *, ...));
int	 sscanf __P((char *, const char *, ...));
FILE	*tmpfile __P((void));
char	*tmpnam __P((char *));
int	 ungetc __P((int, FILE *));
int	 vfprintf __P((FILE *, const char *, _VA_LIST_));
int	 vprintf __P((const char *, _VA_LIST_));
int	 vsprintf __P((char *, const char *, _VA_LIST_));
__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 __P((char *));
FILE	*fdopen __P((int, const char *));
int	 fileno __P((FILE *));
__END_DECLS
#endif /* not ANSI */

/*
 * Routines that are purely local.
 */
#if !defined (_ANSI_SOURCE) && !defined(_POSIX_SOURCE)
__BEGIN_DECLS
char	*fgetline __P((FILE *, size_t *));
int	 fpurge __P((FILE *));
int	 getw __P((FILE *));
int	 pclose __P((FILE *));
FILE	*popen __P((const char *, const char *));
int	 putw __P((int, FILE *));
void	 setbuffer __P((FILE *, char *, int));
int	 setlinebuf __P((FILE *));
char	*tempnam __P((const char *, const char *));
int	 snprintf __P((char *, size_t, const char *, ...));
int	 vsnprintf __P((char *, size_t, const char *, _VA_LIST_));
__END_DECLS

/*
 * This is a #define because the function is used internally and
 * (unlike vfscanf) the name __svfscanf is guaranteed not to collide
 * with a user function when _ANSI_SOURCE or _POSIX_SOURCE is defined.
 */
#define	 vfscanf	__svfscanf

/*
 * Stdio function-access interface.
 */
__BEGIN_DECLS
FILE	*funopen __P((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 /* !_ANSI_SOURCE && !_POSIX_SOURCE */

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

#define	feof(p)		__sfeof(p)
#define	ferror(p)	__sferror(p)
#define	clearerr(p)	__sclearerr(p)

#ifndef _ANSI_SOURCE
#define	fileno(p)	__sfileno(p)
#endif

#ifndef lint
#define	getc(fp)	__sgetc(fp)
#define putc(x, fp)	__sputc(x, fp)
#endif /* lint */

#define	getchar()	getc(stdin)
#define	putchar(x)	putc(x, stdout)
#endif /* _STDIO_H_ */
Commit	Line	Data
238b8fe5 KB	1	/*-
	2	* Copyright (c) 1990 The Regents of the University of California.
	3	* All rights reserved.
	4	*
	5	* This code is derived from software contributed to Berkeley by
	6	* Chris Torek.
	7	*
	8	* %sccs.include.redist.c%
586c39b1	9	*
6124b236	10	* @(#)stdio.h 5.15 (Berkeley) %G%
586c39b1 DF	11	*/
586c39b1 DF	12
238b8fe5 KB	13	#ifndef _STDIO_H_
	14	#define _STDIO_H_
	15
5038e9e5	16	#include <sys/cdefs.h>
238b8fe5	17
6124b236	18	#include <machine/ansi.h>
238b8fe5 KB	19	#ifdef _SIZE_T_
	20	typedef _SIZE_T_ size_t;
	21	#undef _SIZE_T_
	22	#endif
	23
97b8a2b7 KB	24	#ifndef NULL
	25	#define NULL 0
	26	#endif
	27
238b8fe5 KB	28	typedef long fpos_t; /* Must match off_t <sys/types.h> */
	29
	30	#define _FSTDIO /* Define for new stdio with functions. */
	31
5038e9e5 KB	32	/*
	33	* NB: to fit things in six character monocase externals, the stdio
	34	* code uses the prefix `__s' for stdio objects, typically followed
	35	* by a three-character attempt at a mnemonic.
	36	*/
	37
238b8fe5 KB	38	/* stdio buffers */
	39	struct __sbuf {
	40	unsigned char *_base;
	41	int _size;
	42	};
	43
	44	/*
	45	* stdio state variables.
	46	*
	47	* The following always hold:
	48	*
	49	* if (_flags&(__SLBF\|__SWR)) == (__SLBF\|__SWR),
	50	* _lbfsize is -_bf._size, else _lbfsize is 0
	51	* if _flags&__SRD, _w is 0
	52	* if _flags&__SWR, _r is 0
	53	*
	54	* This ensures that the getc and putc macros (or inline functions) never
	55	* try to write or read from a file that is in `read' or `write' mode.
	56	* (Moreover, they can, and do, automatically switch from read mode to
	57	* write mode, and back, on "r+" and "w+" files.)
	58	*
	59	* _lbfsize is used only to make the inline line-buffered output stream
	60	* code as compact as possible.
	61	*
	62	* _ub, _up, and _ur are used when ungetc() pushes back more characters
	63	* than fit in the current _bf, or when ungetc() pushes back a character
	64	* that does not match the previous one in _bf. When this happens,
	65	* _ub._base becomes non-nil (i.e., a stream has ungetc() data iff
	66	* _ub._base!=NULL) and _up and _ur save the current values of _p and _r.
	67	*/
	68	typedef struct __sFILE {
	69	unsigned char _p; / current position in (some) buffer */
	70	int _r; /* read space left for getc() */
	71	int _w; /* write space left for putc() */
	72	short _flags; /* flags, below; this FILE is free if 0 */
	73	short _file; /* fileno, if Unix descriptor, else -1 */
	74	struct __sbuf _bf; /* the buffer (at least 1 byte, if !NULL) */
	75	int _lbfsize; /* 0 or -_bf._size, for inline putc */
	76
	77	/* operations */
	78	void _cookie; / cookie passed to io functions */
4b22ff03 DS	79	int (_close) __P((void ));
	80	int (_read) __P((void , char *, int));
	81	fpos_t (_seek) __P((void , fpos_t, int));
	82	int (_write) __P((void , const char *, int));
238b8fe5 KB	83
	84	/* separate buffer for long sequences of ungetc() */
	85	struct __sbuf _ub; /* ungetc buffer */
	86	unsigned char _up; / saved _p when _p is doing ungetc data */
	87	int _ur; /* saved _r when _r is counting ungetc data */
	88
	89	/* tricks to meet minimum requirements even when malloc() fails */
	90	unsigned char _ubuf[3]; /* guarantee an ungetc() buffer */
	91	unsigned char _nbuf[1]; /* guarantee a getc() buffer */
	92
	93	/* separate buffer for fgetline() when line crosses buffer boundary */
	94	struct __sbuf _lb; /* buffer for fgetline() */
	95
	96	/* Unix stdio files get aligned to block boundaries on fseek() */
	97	int _blksize; /* stat.st_blksize (may be != _bf._size) */
	98	int _offset; /* current lseek offset */
	99	} FILE;
	100
d9f57e12	101	__BEGIN_DECLS
238b8fe5	102	extern FILE __sF[];
d9f57e12	103	__END_DECLS
238b8fe5 KB	104
	105	#define __SLBF 0x0001 /* line buffered */
	106	#define __SNBF 0x0002 /* unbuffered */
	107	#define __SRD 0x0004 /* OK to read */
	108	#define __SWR 0x0008 /* OK to write */
	109	/* RD and WR are never simultaneously asserted */
	110	#define __SRW 0x0010 /* open for reading & writing */
	111	#define __SEOF 0x0020 /* found EOF */
	112	#define __SERR 0x0040 /* found error */
	113	#define __SMBF 0x0080 /* _buf is from malloc */
	114	#define __SAPP 0x0100 /* fdopen()ed in append mode */
	115	#define __SSTR 0x0200 /* this is an sprintf/snprintf string */
	116	#define __SOPT 0x0400 /* do fseek() optimisation */
	117	#define __SNPT 0x0800 /* do not do fseek() optimisation */
	118	#define __SOFF 0x1000 /* set iff _offset is in fact correct */
	119	#define __SMOD 0x2000 /* true => fgetline modified _p text */
	120
	121	/*
	122	* The following three definitions are for ANSI C, which took them
	123	* from System V, which brilliantly took internal interface macros and
	124	* made them official arguments to setvbuf(), without renaming them.
	125	* Hence, these ugly _IOxxx names are supposed to appear in user code.
	126	*
	127	* Although numbered as their counterparts above, the implementation
	128	* does not rely on this.
	129	*/
	130	#define _IOFBF 0 /* setvbuf should set fully buffered */
	131	#define _IOLBF 1 /* setvbuf should set line buffered */
	132	#define _IONBF 2 /* setvbuf should set unbuffered */
	133
	134	#define BUFSIZ 1024 /* size of buffer used by setbuf */
7002c7bd MT	135	#define EOF (-1)
7002c7bd MT	136
238b8fe5 KB	137	/*
	138	* FOPEN_MAX is a minimum maximum, and should be the number of descriptors
	139	* that the kernel can provide without allocation of a resource that can
	140	* fail without the process sleeping. Do not use this for anything.
	141	*/
	142	#define FOPEN_MAX 20 /* must be <= OPEN_MAX <sys/syslimits.h> */
	143	#define FILENAME_MAX 1024 /* must be <= PATH_MAX <sys/syslimits.h> */
7002c7bd	144
238b8fe5 KB	145	/* System V/ANSI C; this is the wrong way to do this, do not use these. */
238b8fe5 KB	146	#ifndef _ANSI_SOURCE
45c3183f	147	#define P_tmpdir "/var/tmp/"
238b8fe5 KB	148	#endif
	149	#define L_tmpnam 1024 /* XXX must be == PATH_MAX */
	150	#define TMP_MAX 308915776
	151
	152	#ifndef SEEK_SET
	153	#define SEEK_SET 0 /* set file offset to offset */
	154	#endif
	155	#ifndef SEEK_CUR
	156	#define SEEK_CUR 1 /* set file offset to current plus offset */
	157	#endif
	158	#ifndef SEEK_END
	159	#define SEEK_END 2 /* set file offset to EOF plus offset */
	160	#endif
	161
	162	#define stdin (&__sF[0])
	163	#define stdout (&__sF[1])
	164	#define stderr (&__sF[2])
	165
	166	/*
	167	* Functions defined in ANSI C standard.
	168	*/
5038e9e5 KB	169	__BEGIN_DECLS
	170	void clearerr __P((FILE *));
	171	int fclose __P((FILE *));
	172	int feof __P((FILE *));
	173	int ferror __P((FILE *));
	174	int fflush __P((FILE *));
	175	int fgetc __P((FILE *));
	176	int fgetpos __P((FILE , fpos_t ));
	177	char fgets __P((char , size_t, FILE *));
4b22ff03	178	FILE fopen __P((const char , const char *));
5038e9e5 KB	179	int fprintf __P((FILE , const char , ...));
	180	int fputc __P((int, FILE *));
	181	int fputs __P((const char , FILE ));
4b22ff03 DS	182	int fread __P((void , size_t, size_t, FILE ));
4b22ff03 DS	183	FILE freopen __P((const char , const char , FILE ));
5038e9e5 KB	184	int fscanf __P((FILE , const char , ...));
	185	int fseek __P((FILE *, long, int));
	186	int fsetpos __P((FILE , const fpos_t ));
	187	long ftell __P((const FILE *));
4b22ff03	188	int fwrite __P((const void , size_t, size_t, FILE ));
5038e9e5 KB	189	int getc __P((FILE *));
	190	int getchar __P((void));
	191	char gets __P((char ));
	192	void perror __P((const char *));
	193	int printf __P((const char *, ...));
	194	int putc __P((int, FILE *));
	195	int putchar __P((int));
	196	int puts __P((const char *));
	197	int remove __P((const char *));
4b22ff03	198	int rename __P((const char , const char ));
5038e9e5 KB	199	void rewind __P((FILE *));
	200	int scanf __P((const char *, ...));
	201	void setbuf __P((FILE , char ));
	202	int setvbuf __P((FILE , char , int, size_t));
	203	int sprintf __P((char , const char , ...));
	204	int sscanf __P((char , const char , ...));
	205	FILE *tmpfile __P((void));
	206	char tmpnam __P((char ));
	207	int ungetc __P((int, FILE *));
	208	int vfprintf __P((FILE , const char , _VA_LIST_));
	209	int vprintf __P((const char *, _VA_LIST_));
	210	int vsprintf __P((char , const char , _VA_LIST_));
	211	__END_DECLS
238b8fe5 KB	212
	213	/*
	214	* Functions defined in POSIX 1003.1.
	215	*/
	216	#ifndef _ANSI_SOURCE
	217	#define L_cuserid 9 /* size for cuserid(); UT_NAMESIZE + 1 */
	218	#define L_ctermid 1024 /* size for ctermid(); PATH_MAX */
	219
5038e9e5	220	__BEGIN_DECLS
41dd63a8	221	char ctermid __P((char ));
5038e9e5 KB	222	FILE fdopen __P((int, const char ));
	223	int fileno __P((FILE *));
	224	__END_DECLS
4b22ff03	225	#endif /* not ANSI */
238b8fe5 KB	226
	227	/*
	228	* Routines that are purely local.
	229	*/
4b22ff03	230	#if !defined (_ANSI_SOURCE) && !defined(_POSIX_SOURCE)
5038e9e5 KB	231	__BEGIN_DECLS
	232	char fgetline __P((FILE , size_t *));
	233	int fpurge __P((FILE *));
	234	int getw __P((FILE *));
	235	int pclose __P((FILE *));
4b22ff03	236	FILE popen __P((const char , const char *));
5038e9e5 KB	237	int putw __P((int, FILE *));
	238	void setbuffer __P((FILE , char , int));
	239	int setlinebuf __P((FILE *));
45c3183f	240	char tempnam __P((const char , const char *));
5038e9e5 KB	241	int snprintf __P((char , size_t, const char , ...));
	242	int vsnprintf __P((char , size_t, const char , _VA_LIST_));
	243	__END_DECLS
cede253f	244
6b5bab0e DS	245	/*
	246	* This is a #define because the function is used internally and
	247	* (unlike vfscanf) the name __svfscanf is guaranteed not to collide
	248	* with a user function when _ANSI_SOURCE or _POSIX_SOURCE is defined.
	249	*/
	250	#define vfscanf __svfscanf
	251
238b8fe5 KB	252	/*
	253	* Stdio function-access interface.
	254	*/
5038e9e5	255	__BEGIN_DECLS
4b22ff03 DS	256	FILE funopen __P((const void ,
	257	int ()(void , char *, int),
	258	int ()(void , const char *, int),
	259	fpos_t ()(void , fpos_t, int),
	260	int ()(void )));
5038e9e5	261	__END_DECLS
238b8fe5 KB	262	#define fropen(cookie, fn) funopen(cookie, fn, 0, 0, 0)
238b8fe5 KB	263	#define fwopen(cookie, fn) funopen(cookie, 0, fn, 0, 0)
d9f57e12	264	#endif /* !_ANSI_SOURCE && !_POSIX_SOURCE */
238b8fe5 KB	265
	266	/*
	267	* Functions internal to the implementation.
	268	*/
d9f57e12	269	__BEGIN_DECLS
5038e9e5	270	int __srget __P((FILE *));
6b5bab0e	271	int __svfscanf __P((FILE , const char , _VA_LIST_));
5038e9e5	272	int __swbuf __P((int, FILE *));
d9f57e12	273	__END_DECLS
238b8fe5 KB	274
	275	/*
	276	* The __sfoo macros are here so that we can
	277	* define function versions in the C library.
	278	*/
	279	#define __sgetc(p) (--(p)->_r < 0 ? __srget(p) : (int)(*(p)->_p++))
6b5bab0e DS	280	#if defined(__GNUC__) && defined(__STDC__)
6b5bab0e DS	281	static inline int __sputc(int _c, FILE *_p) {
238b8fe5 KB	282	if (--_p->_w >= 0 \|\| (_p->_w >= _p->_lbfsize && (char)_c != '\n'))
	283	return (*_p->_p++ = _c);
	284	else
	285	return (__swbuf(_c, _p));
	286	}
	287	#else
	288	/*
	289	* This has been tuned to generate reasonable code on the vax using pcc.
	290	*/
	291	#define __sputc(c, p) \
	292	(--(p)->_w < 0 ? \
	293	(p)->_w >= (p)->_lbfsize ? \
	294	((p)->_p = (c)), (p)->_p != '\n' ? \
	295	(int)*(p)->_p++ : \
	296	__swbuf('\n', p) : \
	297	__swbuf((int)(c), p) : \
	298	((p)->_p = (c), (int)(p)->_p++))
	299	#endif
	300
	301	#define __sfeof(p) (((p)->_flags & __SEOF) != 0)
	302	#define __sferror(p) (((p)->_flags & __SERR) != 0)
	303	#define __sclearerr(p) ((void)((p)->_flags &= ~(__SERR\|__SEOF)))
	304	#define __sfileno(p) ((p)->_file)
	305
	306	#define feof(p) __sfeof(p)
	307	#define ferror(p) __sferror(p)
	308	#define clearerr(p) __sclearerr(p)
	309
	310	#ifndef _ANSI_SOURCE
	311	#define fileno(p) __sfileno(p)
	312	#endif
	313
	314	#ifndef lint
	315	#define getc(fp) __sgetc(fp)
	316	#define putc(x, fp) __sputc(x, fp)
	317	#endif /* lint */
	318
	319	#define getchar() getc(stdin)
	320	#define putchar(x) putc(x, stdout)
	321	#endif /* _STDIO_H_ */