87 lines
2.7 KiB
C
87 lines
2.7 KiB
C
|
/* 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 */
|