forked from Archive/PX4-Autopilot
91 lines
3.5 KiB
C
91 lines
3.5 KiB
C
/****************************************************************************
|
|
* libc/stdio/lib_ferror.c
|
|
*
|
|
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
|
|
* Author: Gregory Nutt <gnutt@nuttx.org>
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in
|
|
* the documentation and/or other materials provided with the
|
|
* distribution.
|
|
* 3. Neither the name NuttX nor the names of its contributors may be
|
|
* used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
|
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
|
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
|
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
|
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
|
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
|
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
|
|
#include <stdio.h>
|
|
#include <errno.h>
|
|
|
|
#include <nuttx/fs/fs.h>
|
|
|
|
#if CONFIG_NFILE_STREAMS > 0
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: ferror
|
|
*
|
|
* Description:
|
|
* This function will test if the last operation resulted in an eror. This
|
|
* is used to disambiguate EOF and error conditions.
|
|
*
|
|
* Return Value:
|
|
* A non-zero value is returned to indicate the error condition.
|
|
*
|
|
****************************************************************************/
|
|
|
|
int ferror(FILE *stream)
|
|
{
|
|
#if 0
|
|
/* If an error is encountered by any of the C-buffered I/O functions, they
|
|
* should set the __FS_FLAG_ERROR in the fs_flags field of struct
|
|
* file_struct.
|
|
*/
|
|
|
|
return (stream->fs_flags & __FS_FLAG_ERROR) != 0;
|
|
#else
|
|
/* However, nothing currenlty sets the __FS_FLAG_ERROR flag (that is a job
|
|
* for another day). The __FS_FLAG_EOF is set by operations that perform
|
|
* read operations. Since ferror() is probably only called to disambiguate
|
|
* the meaning of other functions that return EOF, to indicate either EOF or
|
|
* an error, just testing for not EOF is probably sufficient for now.
|
|
*
|
|
* This approach would not work if ferror() is called in other contexts. In
|
|
* those cases, ferror() will always report an error.
|
|
*/
|
|
|
|
return (stream->fs_flags & __FS_FLAG_EOF) == 0;
|
|
#endif
|
|
}
|
|
|
|
#endif /* CONFIG_NFILE_STREAMS */
|
|
|