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/* SPDX-License-Identifier: BSD-2-Clause */
/**
* @file
*
* @brief RTEMS File System Data
*
* @ingroup rtems_rfs
*
* RTEMS File System Data.
*
* Access data in the correct byte order for the specific target we are running
* on.
*
* @todo Make direct access on matching byte ordered targets.
*/
/*
* COPYRIGHT (c) 2010 Chris Johns <chrisj@rtems.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.
*
* 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.
*/
#if !defined (_RTEMS_RFS_DATA_H_)
#define _RTEMS_RFS_DATA_H_
#include <stdint.h>
/**
* Helper function to make sure we have a byte pointer.
*/
#define rtems_rfs_data_ptr(_d) ((uint8_t*)(_d))
/**
* Helper function to get the data shifted in the correctly sized type.
*/
#define rtems_rfs_data_get(_d, _t, _o, _s) \
(((_t)(rtems_rfs_data_ptr (_d)[_o])) << (_s))
/**
* RFS Read Unsigned 8bit Integer
*/
#define rtems_rfs_read_u8(_d) \
(*rtems_rfs_data_ptr (_d))
/**
* RFS Read Unsigned 16bit Integer
*/
#define rtems_rfs_read_u16(_d) \
(rtems_rfs_data_get (_d, uint16_t, 0, 8) | \
rtems_rfs_data_get (_d, uint16_t, 1, 0))
/**
* RFS Read Unsigned 32bit Integer
*/
#define rtems_rfs_read_u32(_d) \
(rtems_rfs_data_get (_d, uint32_t, 0, 24) | \
rtems_rfs_data_get (_d, uint32_t, 1, 16) | \
rtems_rfs_data_get (_d, uint32_t, 2, 8) | \
rtems_rfs_data_get (_d, uint32_t, 3, 0))
/**
* RFS Write Unsigned 8bit Integer
*/
#define rtems_rfs_write_u8(_d, _v) \
(*rtems_rfs_data_ptr (_d) = (uint8_t)(_v))
/**
* RFS Write Unsigned 16bit Integer
*/
#define rtems_rfs_write_u16(_d, _v) \
do { \
rtems_rfs_data_ptr (_d)[0] = (uint8_t)(((uint16_t)(_v)) >> 8); \
rtems_rfs_data_ptr (_d)[1] = (uint8_t)((_v)); \
} while (0)
/**
* RFS Write Unsigned 32bit Integer
*/
#define rtems_rfs_write_u32(_d, _v) \
do { \
rtems_rfs_data_ptr (_d)[0] = (uint8_t)(((uint32_t)(_v)) >> 24); \
rtems_rfs_data_ptr (_d)[1] = (uint8_t)(((uint32_t)(_v)) >> 16); \
rtems_rfs_data_ptr (_d)[2] = (uint8_t)(((uint32_t)(_v)) >> 8); \
rtems_rfs_data_ptr (_d)[3] = (uint8_t)((uint32_t)(_v)); \
} while (0)
#endif
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