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/* Functions to access FILE structure internals.
Copyright (C) 2000-2022 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, see
<https://www.gnu.org/licenses/>. */
/* 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 */
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