148 lines
5.3 KiB
C
148 lines
5.3 KiB
C
/**
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* Copyright (c) 2006 - 2017, Nordic Semiconductor ASA
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form, except as embedded into a Nordic
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* Semiconductor ASA integrated circuit in a product or a software update for
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* such product, must reproduce the above copyright notice, this list of
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* conditions and the following disclaimer in the documentation and/or other
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* materials provided with the distribution.
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*
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* 3. Neither the name of Nordic Semiconductor ASA nor the names of its
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* contributors may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* 4. This software, with or without modification, must only be used with a
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* Nordic Semiconductor ASA integrated circuit.
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*
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* 5. Any software provided in binary form under this license must not be reverse
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* engineered, decompiled, modified and/or disassembled.
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*
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* THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#ifndef NRF_BITMASK_H
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#define NRF_BITMASK_H
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#include "compiler_abstraction.h"
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#include <stdint.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define BITMASK_BYTE_GET(abs_bit) ((abs_bit)/8)
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#define BITMASK_RELBIT_GET(abs_bit) ((abs_bit) & 0x00000007)
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/**
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* Function for checking if bit in the multi-byte bit mask is set.
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*
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* @param bit Bit index.
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* @param p_mask A pointer to mask with bit fields.
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*
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* @return 0 if bit is not set, positive value otherwise.
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*/
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__STATIC_INLINE uint32_t nrf_bitmask_bit_is_set(uint32_t bit, void const * p_mask)
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{
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uint8_t const * p_mask8 = (uint8_t const *)p_mask;
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uint32_t byte_idx = BITMASK_BYTE_GET(bit);
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bit = BITMASK_RELBIT_GET(bit);
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return (1 << bit) & p_mask8[byte_idx];
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}
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/**
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* Function for setting a bit in the multi-byte bit mask.
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*
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* @param bit Bit index.
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* @param p_mask A pointer to mask with bit fields.
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*/
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__STATIC_INLINE void nrf_bitmask_bit_set(uint32_t bit, void * p_mask)
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{
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uint8_t * p_mask8 = (uint8_t *)p_mask;
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uint32_t byte_idx = BITMASK_BYTE_GET(bit);
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bit = BITMASK_RELBIT_GET(bit);
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p_mask8[byte_idx] |= (1 << bit);
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}
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/**
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* Function for clearing a bit in the multi-byte bit mask.
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*
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* @param bit Bit index.
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* @param p_mask A pointer to mask with bit fields.
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*/
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__STATIC_INLINE void nrf_bitmask_bit_clear(uint32_t bit, void * p_mask)
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{
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uint8_t * p_mask8 = (uint8_t *)p_mask;
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uint32_t byte_idx = BITMASK_BYTE_GET(bit);
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bit = BITMASK_RELBIT_GET(bit);
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p_mask8[byte_idx] &= ~(1 << bit);
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}
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/**
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* Function for performing bitwise OR operation on two multi-byte bit masks.
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*
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* @param p_mask1 A pointer to the first bit mask.
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* @param p_mask2 A pointer to the second bit mask.
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* @param p_mask_out A pointer to the output bit mask.
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* @param length Length of output mask in bytes.
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*/
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__STATIC_INLINE void nrf_bitmask_masks_or(void const * p_mask1,
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void const * p_mask2,
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void * p_out_mask,
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uint32_t length)
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{
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uint8_t const * p_mask8_1 = (uint8_t const *)p_mask1;
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uint8_t const * p_mask8_2 = (uint8_t const *)p_mask2;
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uint8_t * p_mask8_out = (uint8_t *)p_out_mask;
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uint32_t i;
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for (i = 0; i < length; i++)
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{
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p_mask8_out[i] = p_mask8_1[i] | p_mask8_2[i];
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}
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}
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/**
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* Function for performing bitwise AND operation on two multi-byte bit masks.
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*
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* @param p_mask1 A pointer to the first bit mask.
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* @param p_mask2 A pointer to the second bit mask.
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* @param p_mask_out A pointer to the output bit mask.
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* @param length Length of output mask in bytes.
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*/
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__STATIC_INLINE void nrf_bitmask_masks_and(void const * p_mask1,
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void const * p_mask2,
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void * p_out_mask,
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uint32_t length)
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{
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uint8_t const * p_mask8_1 = (uint8_t const *)p_mask1;
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uint8_t const * p_mask8_2 = (uint8_t const *)p_mask2;
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uint8_t * p_mask8_out = (uint8_t *)p_out_mask;
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uint32_t i;
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for (i = 0; i < length; i++)
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{
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p_mask8_out[i] = p_mask8_1[i] & p_mask8_2[i];
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}
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}
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#ifdef __cplusplus
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}
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#endif
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#endif //NRF_BITMASK_H
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