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/* $NetBSD: stdio.h,v 1.70 2007/08/02 21:49:09 kristerw 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, ...);
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, ...);
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, ...);
int putc(int, FILE *);
int putchar(int);
int puts(const char *);
int remove(const char *);
void rewind(FILE *);
int scanf(const char * __restrict, ...);
void setbuf(FILE * __restrict, char * __restrict);
int setvbuf(FILE * __restrict, char * __restrict, int, size_t);
int sscanf(const char * __restrict, const char * __restrict, ...);
FILE *tmpfile(void);
int ungetc(int, FILE *);
int vfprintf(FILE * __restrict, const char * __restrict, _BSD_VA_LIST_);
int vprintf(const char * __restrict, _BSD_VA_LIST_);

#ifndef __AUDIT__
char *gets(char *);
int sprintf(char * __restrict, const char * __restrict, ...);
char *tmpnam(char *);
int vsprintf(char * __restrict, const char * __restrict,
_BSD_VA_LIST_);
#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 */

/*
* 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)));
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)));
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)

#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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