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-rw-r--r--nuttx/libc/stdio/lib_meminstream.c104
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diff --git a/nuttx/libc/stdio/lib_meminstream.c b/nuttx/libc/stdio/lib_meminstream.c
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-/****************************************************************************
- * libc/stdio/lib_meminstream.c
- *
- * Copyright (C) 2007-2009, 2011-2012 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 <assert.h>
-
-#include "lib_internal.h"
-
-/****************************************************************************
- * Private Functions
- ****************************************************************************/
-
-/****************************************************************************
- * Name: meminstream_getc
- ****************************************************************************/
-
-static int meminstream_getc(FAR struct lib_instream_s *this)
-{
- FAR struct lib_meminstream_s *mthis = (FAR struct lib_meminstream_s *)this;
- int ret;
-
- DEBUGASSERT(this);
-
- /* Get the next character (if any) from the buffer */
-
- if (this->nget < mthis->buflen)
- {
- ret = mthis->buffer[this->nget];
- this->nget++;
- }
- else
- {
- ret = EOF;
- }
-
- return ret;
-}
-
-/****************************************************************************
- * Public Functions
- ****************************************************************************/
-
-/****************************************************************************
- * Name: lib_meminstream
- *
- * Description:
- * Initializes a stream for use with a fixed-size memory buffer.
- *
- * Input parameters:
- * meminstream - User allocated, uninitialized instance of struct
- * lib_meminstream_s to be initialized.
- * bufstart - Address of the beginning of the fixed-size memory buffer
- * buflen - Size of the fixed-sized memory buffer in bytes
- *
- * Returned Value:
- * None (meminstream initialized).
- *
- ****************************************************************************/
-
-void lib_meminstream(FAR struct lib_meminstream_s *meminstream,
- FAR const char *bufstart, int buflen)
-{
- meminstream->public.get = meminstream_getc;
- meminstream->public.nget = 0; /* Will be buffer index */
- meminstream->buffer = bufstart; /* Start of buffer */
- meminstream->buflen = buflen; /* Length of the buffer */
-}
-
-