simmel-bootloader/lib/sdk/components/libraries/util/nrf_bitmask.h
hathach df71d3444d follow #1
seperate files from latest SDK (currently 14.2.0) from good old non-
secure bootloader sdk 11
2018-04-05 00:35:08 +07:00

148 lines
5.3 KiB
C

/**
* Copyright (c) 2006 - 2017, Nordic Semiconductor ASA
*
* All rights reserved.
*
* 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, except as embedded into a Nordic
* Semiconductor ASA integrated circuit in a product or a software update for
* such product, 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 of Nordic Semiconductor ASA nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* 4. This software, with or without modification, must only be used with a
* Nordic Semiconductor ASA integrated circuit.
*
* 5. Any software provided in binary form under this license must not be reverse
* engineered, decompiled, modified and/or disassembled.
*
* THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA 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.
*
*/
#ifndef NRF_BITMASK_H
#define NRF_BITMASK_H
#include "compiler_abstraction.h"
#include <stdint.h>
#ifdef __cplusplus
extern "C" {
#endif
#define BITMASK_BYTE_GET(abs_bit) ((abs_bit)/8)
#define BITMASK_RELBIT_GET(abs_bit) ((abs_bit) & 0x00000007)
/**
* Function for checking if bit in the multi-byte bit mask is set.
*
* @param bit Bit index.
* @param p_mask A pointer to mask with bit fields.
*
* @return 0 if bit is not set, positive value otherwise.
*/
__STATIC_INLINE uint32_t nrf_bitmask_bit_is_set(uint32_t bit, void const * p_mask)
{
uint8_t const * p_mask8 = (uint8_t const *)p_mask;
uint32_t byte_idx = BITMASK_BYTE_GET(bit);
bit = BITMASK_RELBIT_GET(bit);
return (1 << bit) & p_mask8[byte_idx];
}
/**
* Function for setting a bit in the multi-byte bit mask.
*
* @param bit Bit index.
* @param p_mask A pointer to mask with bit fields.
*/
__STATIC_INLINE void nrf_bitmask_bit_set(uint32_t bit, void * p_mask)
{
uint8_t * p_mask8 = (uint8_t *)p_mask;
uint32_t byte_idx = BITMASK_BYTE_GET(bit);
bit = BITMASK_RELBIT_GET(bit);
p_mask8[byte_idx] |= (1 << bit);
}
/**
* Function for clearing a bit in the multi-byte bit mask.
*
* @param bit Bit index.
* @param p_mask A pointer to mask with bit fields.
*/
__STATIC_INLINE void nrf_bitmask_bit_clear(uint32_t bit, void * p_mask)
{
uint8_t * p_mask8 = (uint8_t *)p_mask;
uint32_t byte_idx = BITMASK_BYTE_GET(bit);
bit = BITMASK_RELBIT_GET(bit);
p_mask8[byte_idx] &= ~(1 << bit);
}
/**
* Function for performing bitwise OR operation on two multi-byte bit masks.
*
* @param p_mask1 A pointer to the first bit mask.
* @param p_mask2 A pointer to the second bit mask.
* @param p_mask_out A pointer to the output bit mask.
* @param length Length of output mask in bytes.
*/
__STATIC_INLINE void nrf_bitmask_masks_or(void const * p_mask1,
void const * p_mask2,
void * p_out_mask,
uint32_t length)
{
uint8_t const * p_mask8_1 = (uint8_t const *)p_mask1;
uint8_t const * p_mask8_2 = (uint8_t const *)p_mask2;
uint8_t * p_mask8_out = (uint8_t *)p_out_mask;
uint32_t i;
for (i = 0; i < length; i++)
{
p_mask8_out[i] = p_mask8_1[i] | p_mask8_2[i];
}
}
/**
* Function for performing bitwise AND operation on two multi-byte bit masks.
*
* @param p_mask1 A pointer to the first bit mask.
* @param p_mask2 A pointer to the second bit mask.
* @param p_mask_out A pointer to the output bit mask.
* @param length Length of output mask in bytes.
*/
__STATIC_INLINE void nrf_bitmask_masks_and(void const * p_mask1,
void const * p_mask2,
void * p_out_mask,
uint32_t length)
{
uint8_t const * p_mask8_1 = (uint8_t const *)p_mask1;
uint8_t const * p_mask8_2 = (uint8_t const *)p_mask2;
uint8_t * p_mask8_out = (uint8_t *)p_out_mask;
uint32_t i;
for (i = 0; i < length; i++)
{
p_mask8_out[i] = p_mask8_1[i] & p_mask8_2[i];
}
}
#ifdef __cplusplus
}
#endif
#endif //NRF_BITMASK_H