* libs/libc/stream/lib_fileoutstream.c
*
* SPDX-License-Identifier: Apache-2.0
*
* 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 <unistd.h>
#include <assert.h>
#include <errno.h>
#include <nuttx/fs/fs.h>
#include "libc.h"
* Pre-processor Definitions
****************************************************************************/
#ifndef CONFIG_DISABLE_MOUNTPOINT
* Private Functions
****************************************************************************/
* Name: rawoutstream_puts
****************************************************************************/
static ssize_t fileoutstream_puts(FAR struct lib_outstream_s *self,
FAR const void *buf, size_t len)
{
FAR struct lib_fileoutstream_s *stream =
(FAR struct lib_fileoutstream_s *)self;
ssize_t nwritten;
do
{
nwritten = file_write(&stream->file, buf, len);
if (nwritten >= 0)
{
self->nput += nwritten;
return nwritten;
}
* was awakened by a signal. Zero would not be a valid return value
* from _NX_WRITE().
*/
DEBUGASSERT(nwritten < 0);
}
while (nwritten == -EINTR);
return nwritten;
}
* Name: rawoutstream_putc
****************************************************************************/
static void fileoutstream_putc(FAR struct lib_outstream_s *self, int ch)
{
char tmp = ch;
fileoutstream_puts(self, &tmp, 1);
}
* Public Functions
****************************************************************************/
* Name: lib_fileoutstream_open
*
* Description:
* Initializes a stream for use with a file descriptor.
* This function sets up the stream structure to enable writing to a file
* specified by the provide path. It initializes the necessary function
* pointers for character and string output, as well as the flush behavior.
*
* Input Parameters:
* stream - User allocated, uninitialized instance of struct
* lib_rawoutstream_s to be initialized.
* path - Path to file to open.
* oflag - Open flags.
* mode - Mode flags.
*
* Returned Value:
* 0 on success, negative error code in failure.
*
****************************************************************************/
int lib_fileoutstream_open(FAR struct lib_fileoutstream_s *stream,
FAR const char *path, int oflag, mode_t mode)
{
int ret;
ret = file_open(&stream->file, path, oflag, mode);
if (ret < 0)
{
return ret;
}
stream->common.putc = fileoutstream_putc;
stream->common.puts = fileoutstream_puts;
stream->common.flush = lib_noflush;
stream->common.nput = 0;
return 0;
}
* Name: lib_fileoutstream_close
*
* Description:
* Closes the file associated with the stream.
*
* Input Parameters:
* stream - User allocated, uninitialized instance of struct
* lib_rawoutstream_s to be initialized.
*
* Returned Value:
* None (User allocated instance initialized).
*
****************************************************************************/
void lib_fileoutstream_close(FAR struct lib_fileoutstream_s *stream)
{
if (stream != NULL)
{
file_close(&stream->file);
stream->common.nput = 0;
}
}
#endif