73 lines
2.3 KiB
C
73 lines
2.3 KiB
C
/****************************************************************************
|
|
* libs/libc/stdio/lib_fgetpos.c
|
|
*
|
|
* Licensed to the Apache Software Foundation (ASF) under one or more
|
|
* contributor license agreements. See the NOTICE file distributed with
|
|
* this work for additional information regarding copyright ownership. The
|
|
* ASF licenses this file to you under the Apache License, Version 2.0 (the
|
|
* "License"); you may not use this file except in compliance with the
|
|
* License. You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
* License for the specific language governing permissions and limitations
|
|
* under the License.
|
|
*
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
|
|
#include <sys/types.h>
|
|
#include <stdio.h>
|
|
#include <errno.h>
|
|
|
|
#include "libc.h"
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: fgetpos
|
|
*
|
|
* Description:
|
|
* fgetpos() function is an alternate interfaces equivalent to ftell().
|
|
* It gets the current value of the file offset and store it in the
|
|
* location referenced by pos. On some non-UNIX systems an fpos_t object
|
|
* may be a complex object and fsetpos may be the only way to portably
|
|
* reposition a stream.
|
|
*
|
|
* Returned Value:
|
|
* Zero on success; -1 on failure with errno set appropriately.
|
|
*
|
|
****************************************************************************/
|
|
|
|
int fgetpos(FAR FILE *stream, FAR fpos_t *pos)
|
|
{
|
|
off_t position;
|
|
|
|
#ifdef CONFIG_DEBUG_FEATURES
|
|
if (!stream || !pos)
|
|
{
|
|
set_errno(EINVAL);
|
|
return ERROR;
|
|
}
|
|
#endif
|
|
|
|
position = ftello(stream);
|
|
if (position == (off_t)-1)
|
|
{
|
|
return ERROR;
|
|
}
|
|
|
|
*pos = position;
|
|
return OK;
|
|
}
|