www.pudn.com > tcpipsim.rar > stdio.h

/*- 
 * 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	8.4 (Berkeley) 1/4/94 
 */ 
 
#ifndef	_STDIO_H_ 
#define	_STDIO_H_ 
 
#if !defined(_ANSI_SOURCE) && !defined(__STRICT_ANSI__) 
#include  
#endif 
 
#include  
 
#include  
#ifdef	_BSD_SIZE_T_ 
typedef	_BSD_SIZE_T_	size_t; 
#undef	_BSD_SIZE_T_ 
#endif 
 
#ifndef NULL 
#define	NULL	0 
#endif 
 
/* 
 * This is fairly grotesque, but pure ANSI code must not inspect the 
 * innards of an fpos_t anyway.  The library internally uses off_t, 
 * which we assume is exactly as big as eight chars.  (When we switch 
 * to gcc 2.4 we will use __attribute__ here.) 
 * 
 * WARNING: the alignment constraints on an off_t and the struct below 
 * differ on (e.g.) the SPARC.  Hence, the placement of an fpos_t object 
 * in a structure will change if fpos_t's are not aligned on 8-byte 
 * boundaries.  THIS IS A CROCK, but for now there is no way around it. 
 */ 
#if !defined(_ANSI_SOURCE) && !defined(__STRICT_ANSI__) 
typedef off_t fpos_t; 
#else 
typedef struct __sfpos { 
	char	_pos[8]; 
} 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; 
}; 
 
/* 
 * 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) __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 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 
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 => fgetln 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 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  */ 
#define	FOPEN_MAX	20	/* must be <= OPEN_MAX  */ 
#define	FILENAME_MAX	1024	/* must be <= PATH_MAX  */ 
 
/* 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 *)); 
size_t	 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 *)); 
size_t	 fwrite __P((const void *, size_t, size_t, FILE *)); 
int	 getc __P((FILE *)); 
int	 getchar __P((void)); 
char	*gets __P((char *)); 
#if !defined(_ANSI_SOURCE) && !defined(_POSIX_SOURCE) 
extern int sys_nerr;			/* perror(3) external variables */ 
extern __const char *__const sys_errlist[]; 
#endif 
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((const char *, const char *, ...)); 
FILE	*tmpfile __P((void)); 
char	*tmpnam __P((char *)); 
int	 ungetc __P((int, FILE *)); 
int	 vfprintf __P((FILE *, const char *, _BSD_VA_LIST_)); 
int	 vprintf __P((const char *, _BSD_VA_LIST_)); 
int	 vsprintf __P((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 __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	*fgetln __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 *, _BSD_VA_LIST_)); 
int	 vscanf __P((const char *, _BSD_VA_LIST_)); 
int	 vsscanf __P((const char *, const char *, _BSD_VA_LIST_)); 
FILE	*zopen __P((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 
 
/* 
 * 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 *, _BSD_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_ */