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NetBSD/include/stdio.h
christos 9fa41d7348 add missing attributes to the remaining calls, even the ones that gcc has 
builtin attributes for (for symmetry and consistency). In the future this
might change to use compiler-neutral macros. On the other hand I don't
know of any other compiler that provides other macros with similar
functionality, so why bother?
2008-09-21 16:59:46 +00:00

502 lines
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/* $NetBSD: stdio.h,v 1.73 2008/09/21 16:59:46 christos Exp $ */
/*-
* 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/cdefs.h>
#include <sys/featuretest.h>
#include <sys/ansi.h>
#include <machine/ansi.h>
#ifdef _BSD_SIZE_T_
typedef _BSD_SIZE_T_ size_t;
#undef _BSD_SIZE_T_
#endif
#include <sys/null.h>
/*
* 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.
*/
#if (!defined(_ANSI_SOURCE) && !defined(__STRICT_ANSI__)) || defined(_LIBC)
typedef __off_t fpos_t;
#else
typedef struct __sfpos {
__off_t _pos;
} 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() */
unsigned 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);
/* file extension */
struct __sbuf _ext;
/* separate buffer for long sequences of ungetc() */
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 */
} 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. */
#if defined(_XOPEN_SOURCE) || defined(_NETBSD_SOURCE)
#define P_tmpdir "/var/tmp/"
#endif
#define L_tmpnam 1024 /* XXX must be == PATH_MAX */
/* Always ensure that this is consistent with <limits.h> */
#ifndef TMP_MAX
#define TMP_MAX 308915776 /* Legacy */
#endif
/* Always ensure that these are consistent with <fcntl.h> and <unistd.h>! */
#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(FILE *);
int fclose(FILE *);
int feof(FILE *);
int ferror(FILE *);
int fflush(FILE *);
int fgetc(FILE *);
int fgetpos(FILE * __restrict, fpos_t * __restrict);
char *fgets(char * __restrict, int, FILE * __restrict);
FILE *fopen(const char * __restrict , const char * __restrict);
int fprintf(FILE * __restrict , const char * __restrict, ...)
__attribute__((__format__(__printf__, 2, 3)));
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);
int fscanf(FILE * __restrict, const char * __restrict, ...)
__attribute__((__format__(__scanf__, 2, 3)));
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);
int getc(FILE *);
int getchar(void);
void perror(const char *);
int printf(const char * __restrict, ...)
__attribute__((__format__(__printf__, 1, 2)));
int putc(int, FILE *);
int putchar(int);
int puts(const char *);
int remove(const char *);
void rewind(FILE *);
int scanf(const char * __restrict, ...)
__attribute__((__format__(__scanf__, 1, 2)));
void setbuf(FILE * __restrict, char * __restrict);
int setvbuf(FILE * __restrict, char * __restrict, int, size_t);
int sscanf(const char * __restrict, const char * __restrict, ...)
__attribute__((__format__(__scanf__, 2, 3)));
FILE *tmpfile(void);
int ungetc(int, FILE *);
int vfprintf(FILE * __restrict, const char * __restrict, _BSD_VA_LIST_)
__attribute__((__format__(__printf__, 2, 0)));
int vprintf(const char * __restrict, _BSD_VA_LIST_)
__attribute__((__format__(__printf__, 1, 0)));
#ifndef __AUDIT__
char *gets(char *);
int sprintf(char * __restrict, const char * __restrict, ...)
__attribute__((__format__(__printf__, 2, 3)));
char *tmpnam(char *);
int vsprintf(char * __restrict, const char * __restrict,
_BSD_VA_LIST_)
__attribute__((__format__(__printf__, 2, 0)));
#endif
#if defined(_POSIX_C_SOURCE) || defined(_XOPEN_SOURCE)
int rename (const char *, const char *) __RENAME(__posix_rename);
#else
int rename (const char *, const char *);
#endif
__END_DECLS
/*
* IEEE Std 1003.1-90
*/
#if defined(_POSIX_C_SOURCE) || defined(_XOPEN_SOURCE) || \
defined(_NETBSD_SOURCE)
#define L_ctermid 1024 /* size for ctermid(); PATH_MAX */
#define L_cuserid 9 /* size for cuserid(); UT_NAMESIZE + 1 */
__BEGIN_DECLS
char *ctermid(char *);
#ifndef __CUSERID_DECLARED
#define __CUSERID_DECLARED
/* also declared in unistd.h */
char *cuserid(char *);
#endif /* __CUSERID_DECLARED */
FILE *fdopen(int, const char *);
int fileno(FILE *);
__END_DECLS
#endif /* not ANSI */
/*
* IEEE Std 1003.1c-95, also adopted by X/Open CAE Spec Issue 5 Version 2
*/
#if (_POSIX_C_SOURCE - 0) >= 199506L || (_XOPEN_SOURCE - 0) >= 500 || \
defined(_REENTRANT) || defined(_NETBSD_SOURCE)
__BEGIN_DECLS
void flockfile(FILE *);
int ftrylockfile(FILE *);
void funlockfile(FILE *);
int getc_unlocked(FILE *);
int getchar_unlocked(void);
int putc_unlocked(int, FILE *);
int putchar_unlocked(int);
__END_DECLS
#endif /* _POSIX_C_SOURCE >= 1995056 || _XOPEN_SOURCE >= 500 || ... */
/*
* Functions defined in POSIX 1003.2 and XPG2 or later.
*/
#if (_POSIX_C_SOURCE - 0) >= 2 || (_XOPEN_SOURCE - 0) >= 2 || \
defined(_NETBSD_SOURCE)
__BEGIN_DECLS
int pclose(FILE *);
FILE *popen(const char *, const char *);
__END_DECLS
#endif
/*
* Functions defined in ISO XPG4.2, ISO C99, POSIX 1003.1-2001 or later.
*/
#if ((__STDC_VERSION__ - 0) >= 199901L) || \
((_POSIX_C_SOURCE - 0) >= 200112L) || \
(defined(_XOPEN_SOURCE) && defined(_XOPEN_SOURCE_EXTENDED)) || \
((_XOPEN_SOURCE - 0) >= 500) || \
defined(_ISOC99_SOURCE) || defined(_NETBSD_SOURCE)
__BEGIN_DECLS
int snprintf(char * __restrict, size_t, const char * __restrict, ...)
__attribute__((__format__(__printf__, 3, 4)));
int vsnprintf(char * __restrict, size_t, const char * __restrict,
_BSD_VA_LIST_)
__attribute__((__format__(__printf__, 3, 0)));
__END_DECLS
#endif
/*
* Functions defined in XPG4.2.
*/
#if defined(_XOPEN_SOURCE) || defined(_NETBSD_SOURCE)
__BEGIN_DECLS
int getw(FILE *);
int putw(int, FILE *);
#ifndef __AUDIT__
char *tempnam(const char *, const char *);
#endif
__END_DECLS
#endif
/*
* X/Open CAE Specification Issue 5 Version 2
*/
#if (_XOPEN_SOURCE - 0) >= 500 || defined(_LARGEFILE_SOURCE) || \
defined(_NETBSD_SOURCE)
#ifndef off_t
typedef __off_t off_t;
#define off_t __off_t
#endif /* off_t */
__BEGIN_DECLS
int fseeko(FILE *, off_t, int);
off_t ftello(FILE *);
__END_DECLS
#endif /* _XOPEN_SOURCE >= 500 || _LARGEFILE_SOURCE || _NETBSD_SOURCE */
/*
* Functions defined in ISO C99. Still put under _NETBSD_SOURCE due to
* backward compatible.
*/
#if defined(_ISOC99_SOURCE) || defined(_NETBSD_SOURCE)
__BEGIN_DECLS
int vscanf(const char * __restrict, _BSD_VA_LIST_)
__attribute__((__format__(__scanf__, 1, 0)));
int vfscanf(FILE * __restrict, const char * __restrict, _BSD_VA_LIST_)
__attribute__((__format__(__scanf__, 2, 0)));
int vsscanf(const char * __restrict, const char * __restrict,
_BSD_VA_LIST_)
__attribute__((__format__(__scanf__, 2, 0)));
__END_DECLS
#endif /* _ISOC99_SOURCE || _NETBSD_SOURCE */
/*
* Routines that are purely local.
*/
#if defined(_NETBSD_SOURCE)
#define FPARSELN_UNESCESC 0x01
#define FPARSELN_UNESCCONT 0x02
#define FPARSELN_UNESCCOMM 0x04
#define FPARSELN_UNESCREST 0x08
#define FPARSELN_UNESCALL 0x0f
__BEGIN_DECLS
int asprintf(char ** __restrict, const char * __restrict, ...)
__attribute__((__format__(__printf__, 2, 3)));
char *fgetln(FILE * __restrict, size_t * __restrict);
char *fparseln(FILE *, size_t *, size_t *, const char[3], int);
int fpurge(FILE *);
void setbuffer(FILE *, char *, int);
int setlinebuf(FILE *);
int vasprintf(char ** __restrict, const char * __restrict,
_BSD_VA_LIST_)
__attribute__((__format__(__printf__, 2, 0)));
const char *fmtcheck(const char *, const char *)
__attribute__((__format_arg__(2)));
__END_DECLS
/*
* Stdio function-access interface.
*/
__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 /* _NETBSD_SOURCE */
/*
* Functions internal to the implementation.
*/
__BEGIN_DECLS
int __srget(FILE *);
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 == -1 ? -1 : (int)(unsigned short)(p)->_file)
#ifndef __lint__
#if !defined(_REENTRANT) && !defined(_PTHREADS)
#define feof(p) __sfeof(p)
#define ferror(p) __sferror(p)
#define clearerr(p) __sclearerr(p)
#define getc(fp) __sgetc(fp)
#define putc(x, fp) __sputc(x, fp)
#endif /* !_REENTRANT && !_PTHREADS */
#endif /* __lint__ */
#define getchar() getc(stdin)
#define putchar(x) putc(x, stdout)
#if defined(_POSIX_C_SOURCE) || defined(_XOPEN_SOURCE) || \
defined(_NETBSD_SOURCE)
#if !defined(_REENTRANT) && !defined(_PTHREADS)
#define fileno(p) __sfileno(p)
#endif /* !_REENTRANT && !_PTHREADS */
#endif /* !_ANSI_SOURCE */
#if (_POSIX_C_SOURCE - 0) >= 199506L || (_XOPEN_SOURCE - 0) >= 500 || \
defined(_REENTRANT) || defined(_NETBSD_SOURCE)
#define getc_unlocked(fp) __sgetc(fp)
#define putc_unlocked(x, fp) __sputc(x, fp)
#define getchar_unlocked() getc_unlocked(stdin)
#define putchar_unlocked(x) putc_unlocked(x, stdout)
#endif /* _POSIX_C_SOURCE >= 199506 || _XOPEN_SOURCE >= 500 || _REENTRANT... */
#if _FORTIFY_SOURCE > 0
#include <ssp/stdio.h>
#endif
#endif /* _STDIO_H_ */
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