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/*

 * Project: S.Ha.R.K.

 *

 * Coordinators:

 *   Giorgio Buttazzo    <giorgio@sssup.it>

 *   Paolo Gai           <pj@gandalf.sssup.it>

 *

 * Authors     :

 *   Paolo Gai           <pj@gandalf.sssup.it>

 *   Massimiliano Giorgi <massy@gandalf.sssup.it>

 *   Luca Abeni          <luca@gandalf.sssup.it>

 *   (see the web pages for full authors list)

 *

 * ReTiS Lab (Scuola Superiore S.Anna - Pisa - Italy)

 *

 * http://www.sssup.it

 * http://retis.sssup.it

 * http://shark.sssup.it

 */

/**

 ------------

 CVS :        $Id: stdio.h,v 1.1.1.1 2002-03-29 14:12:51 pj Exp $

 File:        $File$

 Revision:    $Revision: 1.1.1.1 $

 Last update: $Date: 2002-03-29 14:12:51 $

 ------------

**/

/*

 * Copyright (C) 2000 Massimiliano Giorgi

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

 *

 */

/*-

 * 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

 *      $\Id: stdio.h,v 1.8 1996/10/27 18:13:33 wosch Exp $

 */

/* MODIFIED (marked with MG)

 * -- include more file

 * -- added mutex_t to FILE structure

 * -- removed some functions and macros

 * -- machine/ansi.h moved to bits/ansi.h

 */

#ifndef _STDIO_H_

#define _STDIO_H_

/* MG */

#include <ll/stdio.h>

#include <kernel/descr.h>

#include <limits.h>

#if !defined(_ANSI_SOURCE) && !defined(__STRICT_ANSI__)

#include <sys/types.h>

#endif

#include <sys/cdefs.h>

#include <bits/ansi.h>

#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) */

        /* MG */

        mutex_t _mutex;           /* thread-safe locker */

} 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 */

/*

 * 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        "/temp/"

#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       9

//#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 *));

__END_DECLS

#endif /* not ANSI */

/*

 * Routines that are purely local.

 */

//#if !defined (_ANSI_SOURCE) && !defined(_POSIX_SOURCE)

__BEGIN_DECLS

int      asprintf __P((char **, const char *, ...));

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      vasprintf __P((char **, const char *, _BSD_VA_LIST_));

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_));

__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_ */