nuttx/libs/libc/builtin/lib_builtin_forindex.c

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/****************************************************************************
* libs/libc/builtin/lib_builtin_forindex.c
*
* Copyright (C) 2011 Uros Platise. All rights reserved.
* Copyright (C) 2011, 2016, 2019 Gregory Nutt. All rights reserved.
* Authors: Uros Platise <uros.platise@isotel.eu>
* 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 <nuttx/lib/builtin.h>
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: builtin_for_index
*
* Description:
* Returns the builtin_s structure for the selected built-in.
* If support for built-in functions is enabled in the NuttX
* configuration, then this function must be provided by the application
* code.
*
* Input Parameters:
* index, from 0 and on...
*
* Returned Value:
* Returns valid pointer pointing to the builtin_s structure if index is
* valid.
* Otherwise, NULL is returned.
*
****************************************************************************/
FAR const struct builtin_s *builtin_for_index(int index)
{
if (index < g_builtin_count)
{
return &g_builtins[index];
}
return NULL;
}