3f1b80218e
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@107 42af7a65-404d-4744-a932-0658087f49c3
83 lines
2.9 KiB
C
83 lines
2.9 KiB
C
/************************************************************
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* lib_rawstream.c
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*
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* Copyright (C) 2007 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 Gregory Nutt 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 <unistd.h>
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#include <errno.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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#if CONFIG_NFILE_DESCRIPTORS > 0
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static void rawstream_putc(struct lib_stream_s *this, int ch)
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{
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struct lib_rawstream_s *rthis = (struct lib_rawstream_s *)this;
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char buffer = ch;
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if (this && rthis->fd >= 0)
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{
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int nwritten;
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do
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{
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nwritten = write(rthis->fd, &buffer, 1);
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if (nwritten == 1)
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{
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this->nput++;
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}
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}
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while (nwritten < 0 && *get_errno_ptr() == EINTR);
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}
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}
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/************************************************************
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* Public Functions
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************************************************************/
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void lib_rawstream(struct lib_rawstream_s *rawstream, int fd)
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{
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rawstream->public.put = rawstream_putc;
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rawstream->public.nput = 0;
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rawstream->fd = fd;
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}
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#endif /* CONFIG_NFILE_DESCRIPTORS */
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