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/* Functions to access FILE structure internals.
   Copyright (C) 2000, 2001, 2003 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
 
   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.
 
   The GNU C Library 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
   Lesser General Public License for more details.
 
   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */
 
/* This header contains the same definitions as the header of the same name
   on Sun's Solaris OS.  */
 
#ifndef _STDIO_EXT_H
#define _STDIO_EXT_H	1
 
#include <stdio.h>
 
enum
{
  /* Query current state of the locking status.  */
  FSETLOCKING_QUERY = 0,
#define FSETLOCKING_QUERY	FSETLOCKING_QUERY
  /* The library protects all uses of the stream functions, except for
     uses of the *_unlocked functions, by calls equivalent to flockfile().  */
  FSETLOCKING_INTERNAL,
#define FSETLOCKING_INTERNAL	FSETLOCKING_INTERNAL
  /* The user will take care of locking.  */
  FSETLOCKING_BYCALLER
#define FSETLOCKING_BYCALLER	FSETLOCKING_BYCALLER
};
 
 
__BEGIN_DECLS
 
/* Return the size of the buffer of FP in bytes currently in use by
   the given stream.  */
extern size_t __fbufsize (FILE *__fp) __THROW;
 
 
/* Return non-zero value iff the stream FP is opened readonly, or if the
   last operation on the stream was a read operation.  */
extern int __freading (FILE *__fp) __THROW;
 
/* Return non-zero value iff the stream FP is opened write-only or
   append-only, or if the last operation on the stream was a write
   operation.  */
extern int __fwriting (FILE *__fp) __THROW;
 
 
/* Return non-zero value iff stream FP is not opened write-only or
   append-only.  */
extern int __freadable (FILE *__fp) __THROW;
 
/* Return non-zero value iff stream FP is not opened read-only.  */
extern int __fwritable (FILE *__fp) __THROW;
 
 
/* Return non-zero value iff the stream FP is line-buffered.  */
extern int __flbf (FILE *__fp) __THROW;
 
 
/* Discard all pending buffered I/O on the stream FP.  */
extern void __fpurge (FILE *__fp) __THROW;
 
/* Return amount of output in bytes pending on a stream FP.  */
extern size_t __fpending (FILE *__fp) __THROW;
 
/* Flush all line-buffered files.  */
extern void _flushlbf (void);
 
 
/* Set locking status of stream FP to TYPE.  */
extern int __fsetlocking (FILE *__fp, int __type) __THROW;
 
__END_DECLS
 
#endif	/* stdio_ext.h */