/****************************************************************************
 * libs/libc/stream/lib_nullinstream.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 <stdio.h>
#include <errno.h>

#include "libc.h"

/****************************************************************************
 * Private Functions
 ****************************************************************************/

static int nullinstream_getc(FAR struct lib_instream_s *self)
{
  UNUSED(self);
  return EOF;
}

static int nullinstream_gets(FAR struct lib_instream_s *self,
                             FAR void *buffer, int len)
{
  UNUSED(buffer);
  UNUSED(len);
  return EOF;
}

/****************************************************************************
 * Public Functions
 ****************************************************************************/

/****************************************************************************
 * Name: lib_nullinstream
 *
 * Description:
 *   Initializes a NULL stream. The initialized stream will  will return only
 *   EOF.
 *
 * Input Parameters:
 *   stream  - User allocated, uninitialized instance of struct
 *             lib_instream_s to be initialized.
 *
 * Returned Value:
 *   None (User allocated instance initialized).
 *
 ****************************************************************************/

void lib_nullinstream(FAR struct lib_instream_s *stream)
{
  stream->getc = nullinstream_getc;
  stream->gets = nullinstream_gets;
  stream->nget = 0;
}