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freebsd-skq/include/stdio.h
Peter Wemm a4add9a9b1 $Id$ -> $FreeBSD$
1999-08-27 23:45:13 +00:00

449 lines
14 KiB
C
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/*-
* 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
* $FreeBSD$
*/
#ifndef _STDIO_H_
#define _STDIO_H_
#include <sys/cdefs.h>
#include <machine/ansi.h>
#ifdef _BSD_SIZE_T_
typedef _BSD_SIZE_T_ size_t;
#undef _BSD_SIZE_T_
#endif
#ifndef NULL
#define NULL 0
#endif
typedef _BSD_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 {
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() optimization */
#define __SNPT 0x0800 /* do not do fseek() optimization */
#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 */
/*
* 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
#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 *, int, 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((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 __const 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
/* size for cuserid(3); UT_NAMESIZE + 1, see <utmp.h> */
#define L_cuserid 17
#define L_ctermid 1024 /* size for ctermid(3); PATH_MAX */
__BEGIN_DECLS
char *ctermid __P((char *));
FILE *fdopen __P((int, const char *));
int fileno __P((FILE *));
int ftrylockfile __P((FILE *));
void flockfile __P((FILE *));
void funlockfile __P((FILE *));
__END_DECLS
#endif /* not ANSI */
/*
* Portability hacks. See <sys/types.h>.
*/
#if !defined (_ANSI_SOURCE) && !defined(_POSIX_SOURCE)
__BEGIN_DECLS
#ifndef _FTRUNCATE_DECLARED
#define _FTRUNCATE_DECLARED
int ftruncate __P((int, _BSD_OFF_T_));
#endif
#ifndef _LSEEK_DECLARED
#define _LSEEK_DECLARED
_BSD_OFF_T_ lseek __P((int, _BSD_OFF_T_, int));
#endif
#ifndef _MMAP_DECLARED
#define _MMAP_DECLARED
void *mmap __P((void *, size_t, int, int, int, _BSD_OFF_T_));
#endif
#ifndef _TRUNCATE_DECLARED
#define _TRUNCATE_DECLARED
int truncate __P((const char *, _BSD_OFF_T_));
#endif
__END_DECLS
#endif /* !_ANSI_SOURCE && !_POSIX_SOURCE */
/*
* Routines that are purely local.
*/
#if !defined (_ANSI_SOURCE) && !defined(_POSIX_SOURCE)
__BEGIN_DECLS
int asprintf __P((char **, const char *, ...)) __printflike(2, 3);
char *fgetln __P((FILE *, size_t *));
int fpurge __P((FILE *));
int fseeko __P((FILE *, _BSD_OFF_T_, int));
_BSD_OFF_T_ ftello __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 *, ...)) __printflike(3, 4);
int vasprintf __P((char **, const char *, _BSD_VA_LIST_))
__printflike(2, 0);
int vsnprintf __P((char *, size_t, const char *, _BSD_VA_LIST_))
__printflike(3, 0);
int vscanf __P((const char *, _BSD_VA_LIST_)) __scanflike(1, 0);
int vsscanf __P((const char *, const char *, _BSD_VA_LIST_))
__scanflike(2, 0);
__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)
/*
* See ISO/IEC 9945-1 ANSI/IEEE Std 1003.1 Second Edition 1996-07-12
* B.8.2.7 for the rationale behind the *_unlocked() macros.
*/
#define feof_unlocked(p) __sfeof(p)
#define ferror_unlocked(p) __sferror(p)
#define clearerr_unlocked(p) __sclearerr(p)
#ifndef _ANSI_SOURCE
#define fileno_unlocked(p) __sfileno(p)
#endif
#ifndef _THREAD_SAFE
#define feof(p) feof_unlocked(p)
#define ferror(p) ferror_unlocked(p)
#define clearerr(p) clearerr_unlocked(p)
#ifndef _ANSI_SOURCE
#define fileno(p) fileno_unlocked(p)
#endif
#endif
#ifndef lint
#define getc_unlocked(fp) __sgetc(fp)
#define putc_unlocked(x, fp) __sputc(x, fp)
#ifdef _THREAD_SAFE
void _flockfile_debug __P((FILE *, char *, int));
#ifdef _FLOCK_DEBUG
#define _FLOCKFILE(x) _flockfile_debug(x, __FILE__, __LINE__)
#else
#define _FLOCKFILE(x) flockfile(x)
#endif
static __inline int \
__getc_locked(FILE *_fp) \
{ \
extern int __isthreaded; \
int _ret; \
if (__isthreaded) \
_FLOCKFILE(_fp); \
_ret = getc_unlocked(_fp); \
if (__isthreaded) \
funlockfile(_fp); \
return (_ret); \
}
static __inline int \
__putc_locked(int _x, FILE *_fp) \
{ \
extern int __isthreaded; \
int _ret; \
if (__isthreaded) \
_FLOCKFILE(_fp); \
_ret = putc_unlocked(_x, _fp); \
if (__isthreaded) \
funlockfile(_fp); \
return (_ret); \
}
#define getc(fp) __getc_locked(fp)
#define putc(x, fp) __putc_locked(x, fp)
#else
#define getc(fp) getc_unlocked(fp)
#define putc(x, fp) putc_unlocked(x, fp)
#endif
#endif /* lint */
#define getchar() getc(stdin)
#define getchar_unlocked() getc_unlocked(stdin)
#define putchar(x) putc(x, stdout)
#define putchar_unlocked(x) putc_unlocked(x, stdout)
#endif /* !_STDIO_H_ */
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