[BACK]Return to stdio.h CVS log [TXT][DIR] Up to [local] / prex-old / usr / include

File: [local] / prex-old / usr / include / stdio.h (download)

Revision 1.1, Tue Jun 3 09:38:47 2008 UTC (15 years, 9 months ago) by nbrk
Branch point for: MAIN

Initial revision

/*-
 * 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. 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 <sys/types.h>
#include <sys/cdefs.h>

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

#include <sys/null.h>

typedef off_t fpos_t;

#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.
 *
 * NB: see WARNING above before changing the layout of this structure!
 */
typedef	struct __sFILE {
	struct __sFILE *next;	/* file chain */
	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) */

	/* 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 */
} 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 */

/*
 * 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	512		/* 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	16	/* must be <= OPEN_MAX <sys/syslimits.h> */
#define	FILENAME_MAX	256	/* 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	255	/* XXX must be == PATH_MAX */
#define	TMP_MAX		308915776

/* access function */
#define	F_OK		0	/* test for existence of file */
#define	X_OK		0x01	/* test for execute or search permission */
#define	W_OK		0x02	/* test for write permission */
#define	R_OK		0x04	/* test for read permission */

/* whence values for lseek(2) */
#define	SEEK_SET	0	/* set file offset to offset */
#define	SEEK_CUR	1	/* set file offset to current plus offset */
#define	SEEK_END	2	/* set file offset to EOF plus offset */

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

/*
 * 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 *, fpos_t *);
char	*fgets(char *, size_t, FILE *);
FILE	*fopen(const char *, const char *);
int	 fprintf(FILE *, const char *, ...);
int	 fputc(int, FILE *);
int	 fputs(const char *, FILE *);
size_t	 fread(void *, size_t, size_t, FILE *);
FILE	*freopen(const char *, const char *, FILE *);
int	 fscanf(FILE *, const char *, ...);
int	 fseek(FILE *, long, int);
int	 fsetpos(FILE *, const fpos_t *);
long	 ftell(FILE *);
size_t	 fwrite(const void *, size_t, size_t, FILE *);
int	 getc(FILE *);
int	 getchar(void);
char	*gets(char *);
#if !defined(_ANSI_SOURCE) && !defined(_POSIX_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 *, ...);
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 *, ...);
void	 setbuf(FILE *, char *);
int	 setvbuf(FILE *, char *, int, size_t);
int	 sprintf(char *, const char *, ...);
int	 sscanf(const char *, const char *, ...);
FILE	*tmpfile(void);
char	*tmpnam(char *);
int	 ungetc(int, FILE *);
int	 vfprintf(FILE *, const char *, _BSD_VA_LIST_);
int	 vprintf(const char *, _BSD_VA_LIST_);
int	 vsprintf(char *, const char *, _BSD_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(char *);
FILE	*fdopen(int, const char *);
int	 fileno(FILE *);
__END_DECLS
#endif /* not ANSI */

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

#endif /* !_ANSI_SOURCE && !_POSIX_SOURCE */

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

/*
 * The __sfoo macros are here so that we can
 * define function versions in the C library.
 */

#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

#endif /* _STDIO_H_ */