75 lines
2.5 KiB
C
75 lines
2.5 KiB
C
/****************************************************************************
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* libs/libc/stream/lib_zeroinstream.c
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <stdio.h>
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#include <errno.h>
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#include "libc.h"
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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static int zeroinstream_getc(FAR struct lib_instream_s *self)
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{
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self->nget++;
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return 0;
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}
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static int zeroinstream_gets(FAR struct lib_instream_s *self,
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FAR void *buffer, int len)
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{
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self->nget += len;
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memset(buffer, 0, len);
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return len;
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: lib_zeroinstream
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*
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* Description:
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* Initializes a NULL stream. The initialized stream will return an
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* infinitely long stream of zeroes.
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*
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* Input Parameters:
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* stream - User allocated, uninitialized instance of struct
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* lib_instream_s to be initialized.
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*
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* Returned Value:
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* None (User allocated instance initialized).
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*
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****************************************************************************/
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void lib_zeroinstream(FAR struct lib_instream_s *stream)
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{
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stream->getc = zeroinstream_getc;
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stream->gets = zeroinstream_gets;
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stream->nget = 0;
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}
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