/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include "lint.h"
#include "file64.h"
#include <sys/types.h>
#include <stdio.h>
#include <mtlib.h>
#include "stdiom.h"
#include <stdio_ext.h>
/*
* Returns non-zero if the file is open readonly, or if the last operation
* on the stream was a read e.g. fread() or fgetc(). Otherwise returns 0.
*/
int
__freading(FILE *stream)
{
return (stream->_flag & _IOREAD);
}
/*
* Returns non-zero if the file is open write-only or append-only, or if
* the last operation on the stream was a write e.g. fwrite() or fputc().
* Otherwise returns 0.
*/
int
__fwriting(FILE *stream)
{
return (stream->_flag & _IOWRT);
}
/*
* Returns non-zero if it is possible to read from a stream.
*/
int
__freadable(FILE *stream)
{
return (stream->_flag & (_IOREAD|_IORW));
}
/*
* Returns non-zero if it is possible to write on a stream.
*/
int
__fwritable(FILE *stream)
{
return (stream->_flag & (_IOWRT|_IORW));
}
/*
* Returns non-zero if the stream is line buffered.
*/
int
__flbf(FILE *stream)
{
return (stream->_flag & _IOLBF);
}
/*
* Discard any pending buffered I/O.
*/
void
__fpurge(FILE *stream)
{
rmutex_t *lk;
FLOCKFILE(lk, stream);
if ((stream->_ptr = stream->_base) != NULL)
stream->_cnt = 0;
FUNLOCKFILE(lk);
}
/*
* Return the amount of output pending on a stream (in bytes).
*/
size_t
__fpending(FILE *stream)
{
size_t amount;
rmutex_t *lk;
FLOCKFILE(lk, stream);
amount = stream->_ptr - stream->_base;
FUNLOCKFILE(lk);
return (amount);
}
/*
* Returns the buffer size (in bytes) currently in use by the given stream.
*/
size_t
__fbufsize(FILE *stream)
{
size_t size;
rmutex_t *lk;
FLOCKFILE(lk, stream);
size = _bufend(stream) - stream->_base;
FUNLOCKFILE(lk);
return (size);
}