44d31f7a80
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4630 42af7a65-404d-4744-a932-0658087f49c3
131 lines
4.7 KiB
C
131 lines
4.7 KiB
C
/****************************************************************************
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* lib/stdio/lib_stdoutstream.c
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*
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* Copyright (C) 2007-2009, 2011 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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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 SHALL 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 <fcntl.h>
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#include "lib_internal.h"
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Name: stdoutstream_putc
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****************************************************************************/
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static void stdoutstream_putc(FAR struct lib_outstream_s *this, int ch)
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{
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FAR struct lib_stdoutstream_s *sthis = (FAR struct lib_stdoutstream_s *)this;
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if (this)
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{
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if (putc(ch, sthis->stream) != EOF)
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{
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this->nput++;
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}
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}
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}
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/****************************************************************************
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* Name: stdoutstream_flush
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****************************************************************************/
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#if defined(CONFIG_STDIO_LINEBUFFER) && CONFIG_STDIO_BUFFER_SIZE > 0
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int stdoutstream_flush(FAR struct lib_outstream_s *this)
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{
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FAR struct lib_stdoutstream_s *sthis = (FAR struct lib_stdoutstream_s *)this;
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return lib_fflush(sthis->stream, true);
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}
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#endif
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: lib_stdoutstream
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*
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* Description:
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* Initializes a stream for use with a FILE instance.
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*
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* Input parameters:
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* stdoutstream - User allocated, uninitialized instance of struct
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* lib_stdoutstream_s to be initialized.
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* stream - User provided stream instance (must have been opened for
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* write access).
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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_stdoutstream(FAR struct lib_stdoutstream_s *stdoutstream,
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FAR FILE *stream)
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{
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/* Select the put operation */
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stdoutstream->public.put = stdoutstream_putc;
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/* Select the correct flush operation. This flush is only called when
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* a newline is encountered in the output stream. However, we do not
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* want to support this line buffering behavior if the stream was
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* opened in binary mode. In binary mode, the newline has no special
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* meaning.
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*/
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#ifdef CONFIG_STDIO_LINEBUFFER
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#if CONFIG_STDIO_BUFFER_SIZE > 0
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if ((stream->fs_oflags & O_BINARY) == 0)
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{
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stdoutstream->public.flush = stdoutstream_flush;
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}
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else
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#endif
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{
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stdoutstream->public.flush = lib_noflush;
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}
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#endif
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/* Set the number of bytes put to zero and remember the stream */
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stdoutstream->public.nput = 0;
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stdoutstream->stream = stream;
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}
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