93 lines
3.3 KiB
C
93 lines
3.3 KiB
C
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/****************************************************************************
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* libc/stdio/lib_setbuf.c
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*
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* Copyright (C) 2017 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT will THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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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 <nuttx/config.h>
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#include <stdio.h>
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#include <assert.h>
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: setbuf
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*
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* Description:
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* Except that it returns no value, the function call setbuf(stream, buf)
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* is equivalent to:
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*
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* setvbuf(stream, buf, _IOFBF, BUFSIZ)
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*
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* if buf is not a null pointer, or to:
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*
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* setvbuf(stream, buf, _IONBF, BUFSIZ)
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*
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* if buf is a null pointer.
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*
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* EXCEPTION: Currently, the NuttX setvbuf() expects the size argument to
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* be zero if the mode is __INOBF. That is a descrepancy! What would a
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* non-zero size mean in that case?
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*
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* Input Parameters:
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* stream - The stream whose buffer will be modified
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* buffer - If non-NULL, this is user allocated buffer of size BUFSIZ. If
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* NULL, setvbuf will disable buffering
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*
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* Returned Value:
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* None
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*
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****************************************************************************/
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void setbuf(FAR FILE *stream, FAR char *buf)
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{
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DEBUGASSERT(stream != NULL);
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#ifndef CONFIG_STDIO_DISABLE_BUFFERING
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if (buf != NULL)
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{
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(void)setvbuf(stream, buf, _IOFBF, BUFSIZ);
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}
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else
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{
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(void)setvbuf(stream, NULL, _IONBF, 0);
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}
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#endif
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}
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