px4-firmware/nuttx/graphics/nxmu/nx_kbdin.c

/****************************************************************************
 * graphics/nxmu/nx_kbdin.c
 *
 *   Copyright (C) 2008-2009, 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 <nuttx/config.h>

#include <stdint.h>
#include <stdlib.h>
#include <errno.h>
#include <debug.h>

#include <nuttx/nx/nx.h>
#include "nxfe.h"

#ifdef CONFIG_NX_KBD

/****************************************************************************
 * Pre-Processor Definitions
 ****************************************************************************/

/****************************************************************************
 * Private Types
 ****************************************************************************/

/****************************************************************************
 * Private Data
 ****************************************************************************/

/****************************************************************************
 * Public Data
 ****************************************************************************/

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

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

/****************************************************************************
 * Name: nx_kbdin
 *
 * Description:
 *   Used by a thread or interrupt handler that manages some kind of keypad
 *   hardware to report text information to the NX server.  That text
 *   data will be routed by the NX server to the appropriate window client.
 *
 ****************************************************************************/

int nx_kbdin(NXHANDLE handle, uint8_t nch, FAR const uint8_t *ch)
{
  FAR struct nxfe_conn_s *conn = (FAR struct nxfe_conn_s *)handle;
  FAR struct nxsvrmsg_kbdin_s *outmsg;
  int size;
  int ret;
  int i;

  /* Allocate a bigger message to account for the variable amount of character
   * data.
   */

  size = sizeof(struct nxsvrmsg_kbdin_s) + nch - 1;
  outmsg = (FAR struct nxsvrmsg_kbdin_s *)malloc(size);
  if (!outmsg)
    {
      errno = ENOMEM;
      return ERROR;
    }

  /* Inform the server of the new keypad data */

  outmsg->msgid = NX_SVRMSG_KBDIN;
  outmsg->nch   = nch;

  for (i = 0; i < nch; i++)
    {
      outmsg->ch[i] = ch[i];
    }

  ret = nxmu_sendserver(conn, outmsg, size);

  free(outmsg);
  return ret;
}

#endif /* CONFIG_NX_KBD */