/************************************************************
 * lib_rawstream.c
 *
 *   Copyright (C) 2007 Gregory Nutt. All rights reserved.
 *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
 *
 * 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 Gregory Nutt 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 <unistd.h>
#include <errno.h>
#include "lib_internal.h"

/************************************************************
 * Private Functions
 ************************************************************/

#if CONFIG_NFILE_DESCRIPTORS > 0

static void rawstream_putc(struct lib_stream_s *this, int ch)
{
  struct lib_rawstream_s *rthis = (struct lib_rawstream_s *)this;
  char buffer = ch;
  if (this && rthis->fd >= 0)
    {
      int nwritten;
      do
        {
          nwritten = write(rthis->fd, &buffer, 1);
          if (nwritten == 1)
            {
              this->nput++;
            }
        }
      while (nwritten < 0 && *get_errno_ptr() == EINTR);
    }
}

/************************************************************
 * Public Functions
 ************************************************************/

void lib_rawstream(struct lib_rawstream_s *rawstream, int fd)
{
  rawstream->public.put  = rawstream_putc;
  rawstream->public.nput = 0;
  rawstream->fd          = fd;
}

#endif /* CONFIG_NFILE_DESCRIPTORS */