542 lines
19 KiB
C
542 lines
19 KiB
C
/**
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* Copyright (c) 2016 - 2020 Nordic Semiconductor ASA and Luxoft Global Operations Gmbh.
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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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*
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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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*
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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 SYS_UTILS_H_INCLUDED
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#define SYS_UTILS_H_INCLUDED
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#include <stdint.h>
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#include <stddef.h>
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#include <string.h>
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#if (defined(__GNUC__) && !defined(__SES_ARM))
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#include <strings.h>
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#endif
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#ifdef __MINGW32__
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#define ffs __builtin_ffs
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#endif
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/** @file
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* This file contains definitions of useful macros and types.
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*
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* @defgroup sys_utils System Utilities API
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* @ingroup sys_15_4
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* @{
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* @brief Module to declare System Utilities API.
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* @details The System Utilities module implements multiple useful macros and inlines for the whole stack. Including
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* this header you will get access to GET_PARENT_BY_FIELD(), FIELD_SIZE() to work with complex structures,
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* ARRAY_SIZE() for arrays, mathematics macros like IMP(), LL_MIN(), LL_MAX(), CEIL(), ROUND(), Bitmap helpers
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* and many others. The variable arguments support macros are also defined here. Some SWAP routines are implemented
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* by this module as well.
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*/
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/**@brief Returns the pointer to the data structure
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*
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* @param[in] struct_type name of the parent structure
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* @param[in] field_name name of the structure field
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* @param[in] field_pointer pointer to the structure field
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*
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* @retval Pointer to the parent structure which includes the field.
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*/
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#define GET_PARENT_BY_FIELD(struct_type, field_name, field_pointer) \
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((struct_type*)(void*)(((uint8_t*)field_pointer) - offsetof(struct_type, field_name)))
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/**@brief Returns the implication of two given expressions x and y.
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* @details The implication means: if X==TRUE then Y==TRUE.
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* The formula is: (X imp Y) = ((not X) or Y)
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*/
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#define IMP(x, y) ( !(x) || (y) )
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/**@brief Returns the minimum of two given expressions x and y.
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*/
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#define LL_MIN(x, y) ( ((x) < (y)) ? (x) : (y) )
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/**@brief Returns the maximum of two given expressions x and y.
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*/
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#define LL_MAX(x, y) ( ((x) > (y)) ? (x) : (y) )
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/**@brief Returns the quotient of a divided by b rounded upwards to the nearest
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* integer.
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*/
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#define CEIL(a, b) ((a) ? (((a) - 1U) / (b) + 1U) : 0U)
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/**@brief Returns the quotient of a divided by b rounded to the nearest integer
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* according to the standard arithmetic rules: if the fractional part of (a/b) is greater
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* or equal to 0.5 then the result is rounded upwards; if the fractional part of (a/b) is
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* less then 0.5 the result is rounded downwards.
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*
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* @note Use this formula only for unsigned arguments. The formula is not compatible with
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* the signed arguments: when a and b have different signs it gives incorrect result.
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*/
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#define ROUND(a, b) ( ((a) + ((b) >> 1)) / (b) )
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/**@brief Declares a long bitmap named name of size bits. The size is rounded
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* upwards to come a multiple of 8.
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*/
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#define BITMAP_DECLARE(name, size) uint8_t name[CEIL(size, 8)]
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/**@brief Clears all bits in given bitmap.
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*/
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#define BITMAP_RESET(name) memset((name), 0U, sizeof(name))
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/**@brief Returns the value of a bit at position bit in the long bitmap named name.
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*/
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#define BITMAP_ISSET(name, bit) ( 0 != ((name)[(bit) >> 3] & (1 << ((bit) & 0x7))) )
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/**@brief Sets the bit at position bit in the long bitmap named name.
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*/
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#define BITMAP_SET(name, bit) (name)[(bit) >> 3] |= (1 << ((bit) & 0x7))
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/**@brief Clears the bit at position bit in the long bitmap named name.
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*/
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#define BITMAP_CLR(name, bit) (name)[(bit) >> 3] &= ~(1 << ((bit) & 0x7))
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/**@brief Assigns the given bitmap with the second bitmap.
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*/
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#define BITMAP_ASSIGN(nameDst, nameSrc) memcpy((nameDst), (nameSrc), sizeof(nameDst))
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/**@brief Compares two bitmaps and returns zero if they are equal.
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*/
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#define BITMAP_EQUAL(name1, name2) ((sizeof(name1) == sizeof(name2)) && \
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(memcmp((name1), (name2), sizeof(name1)) == 0))
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/**@brief Checks number. Return true if number is power of two.
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*/
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#define LL_IS_POWER_OF_TWO(name) ((0 != (name)) && (0 == ((name)&(name - 1))))
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/**@brief Return True if mask is fully included into a given set and False otherwise
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*/
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#define IS_SUBSET_OF(mask, set) ((mask) == ((set) & (mask)))
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/**@brief Creates a bit mask with single set bit on the specified position.
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*/
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#define BIT(pos) (1UL << (pos))
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/**@brief Gets the given bit in the given value
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*/
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#define BIT_GET(val, pos) ((((uint32_t)val) & BIT(pos)) != 0)
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/**@brief Sets or clears the given bit in the given value
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*/
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#define BIT_SET(val, pos, bit) { \
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if (bit) \
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{ \
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val |= BIT(pos); \
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} \
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else \
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{ \
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val &= ~BIT(pos); \
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} \
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}
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/**@brief Returns two to the income power.*/
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#define POWER2(n) (1ULL << (n))
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/**@brief Creates a bit mask of specified length.
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*/
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#define BIT_MASK(len) (BIT(len) - 1UL)
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/**@brief Creates a bit field mask of specified length and start position.
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*/
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#define BIT_FIELD_MASK(start, len) (BIT_MASK(len) << (start))
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/**@brief Creates a bit field mask of specified length, start position and value.
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*/
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#define BIT_FIELD_VALUE(value, start, len) (((value) & BIT_MASK(len)) << (start))
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/**@brief Extracts a bit field value of specified start position and length.
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*/
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#define GET_BITFIELD_VALUE(bitmask, start, len) (((bitmask) >> (start)) & BIT_MASK(len))
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/**@brief Inserts a bit field value with specified start position and length.
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*/
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#define SET_BITFIELD_VALUE(bitmask, start, len, value) \
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(bitmask = (bitmask & ~BIT_FIELD_MASK(start, len)) | BIT_FIELD_VALUE(value, start, len))
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/**@brief Extracts a mask from a BITMAP.
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* BITMAP MUST be aligned and mask length MUST be one of 2, 4, 8, 16, 32.
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*/
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#define BITMAP_MASK_GET(bitmap, bit, len) \
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GET_BITFIELD_VALUE(((uint32_t*)(bitmap))[(bit) >> 5], (bit) & 0x1F, len)
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/**@brief Sets up a mask to a BITMAP.
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* BITMAP MUST be aligned and mask length MUST be one of 2, 4, 8, 16, 32.
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*/
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#define BITMAP_MASK_SET(bitmap, bit, len, value) \
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SET_BITFIELD_VALUE(((uint32_t*)(bitmap))[(bit) >> 5], (bit) & 0x1F, len, value)
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/**@brief Gets amount of the arguments.
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*/
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#define VA_NARGS(...) VA_NARGS_EVAL(__VA_ARGS__)
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#define VA_NARGS_EVAL(...) VA_NARGS_IMPL(__VA_ARGS__, \
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/* 255, 254, */ 253, 252, 251, 250, 249, 248, 247, 246, 245, 244, 243, 242, 241, 240, \
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239, 238, 237, 236, 235, 234, 233, 232, 231, 230, 229, 228, 227, 226, 225, 224, \
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223, 222, 221, 220, 219, 218, 217, 216, 215, 214, 213, 212, 211, 210, 209, 208, \
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207, 206, 205, 204, 203, 202, 201, 200, 199, 198, 197, 196, 195, 194, 193, 192, \
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191, 190, 189, 188, 187, 186, 185, 184, 183, 182, 181, 180, 179, 178, 177, 176, \
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175, 174, 173, 172, 171, 170, 169, 168, 167, 166, 165, 164, 163, 162, 161, 160, \
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159, 158, 157, 156, 155, 154, 153, 152, 151, 150, 149, 148, 147, 146, 145, 144, \
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143, 142, 141, 140, 139, 138, 137, 136, 135, 134, 133, 132, 131, 130, 129, 128, \
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127, 126, 125, 124, 123, 122, 121, 120, 119, 118, 117, 116, 115, 114, 113, 112, \
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111, 110, 109, 108, 107, 106, 105, 104, 103, 102, 101, 100, 99, 98, 97, 96, \
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095, 94, 93, 92, 91, 90, 89, 88, 87, 86, 85, 84, 83, 82, 81, 80, \
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079, 78, 77, 76, 75, 74, 73, 72, 71, 70, 69, 68, 67, 66, 65, 64, \
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063, 62, 61, 60, 59, 58, 57, 56, 55, 54, 53, 52, 51, 50, 49, 48, \
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047, 46, 45, 44, 43, 42, 41, 40, 39, 38, 37, 36, 35, 34, 33, 32, \
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031, 30, 29, 28, 27, 26, 25, 24, 23, 22, 21, 20, 19, 18, 17, 16, \
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015, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0)
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/**@brief Helper macro. Gets amount of the arguments.
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*/
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#define VA_NARGS_IMPL(_________1, _2, _3, _4, _5, _6, _7, \
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_8, _9, _10, _11, _12, _13, _14, _15, \
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__16, _17, _18, _19, _20, _21, _22, _23, \
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_24, _25, _26, _27, _28, _29, _30, _31, \
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__32, _33, _34, _35, _36, _37, _38, _39, \
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_40, _41, _42, _43, _44, _45, _46, _47, \
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__48, _49, _50, _51, _52, _53, _54, _55, \
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_56, _57, _58, _59, _60, _61, _62, _63, \
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__64, _65, _66, _67, _68, _69, _70, _71, \
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_72, _73, _74, _75, _76, _77, _78, _79, \
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__80, _81, _82, _83, _84, _85, _86, _87, \
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_88, _89, _90, _91, _92, _93, _94, _95, \
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__96, _97, _98, _99, _100, _101, _102, _103, \
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_104, _105, _106, _107, _108, _109, _110, _111, \
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_112, _113, _114, _115, _116, _117, _118, _119, \
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_120, _121, _122, _123, _124, _125, _126, _127, \
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_128, _129, _130, _131, _132, _133, _134, _135, \
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_136, _137, _138, _139, _140, _141, _142, _143, \
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_144, _145, _146, _147, _148, _149, _150, _151, \
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_152, _153, _154, _155, _156, _157, _158, _159, \
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_160, _161, _162, _163, _164, _165, _166, _167, \
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_168, _169, _170, _171, _172, _173, _174, _175, \
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_176, _177, _178, _179, _180, _181, _182, _183, \
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_184, _185, _186, _187, _188, _189, _190, _191, \
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_192, _193, _194, _195, _196, _197, _198, _199, \
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_200, _201, _202, _203, _204, _205, _206, _207, \
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_208, _209, _210, _211, _212, _213, _214, _215, \
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_216, _217, _218, _219, _220, _221, _222, _223, \
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_224, _225, _226, _227, _228, _229, _230, _231, \
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_232, _233, _234, _235, _236, _237, _238, _239, \
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_240, _241, _242, _243, _244, _245, _246, _247, \
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_248, _249, _250, _251, _252, _253, /* _254, _255, */\
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N, ...) N
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/**@brief Gets amount of the arguments. Execute by compiler.
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*/
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#define VA_NARGS_COMPILE_TIME(...) ((uint8_t)(sizeof((uint8_t[]){ __VA_ARGS__ })/sizeof(uint8_t)))
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/**@brief Swaps values.
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*/
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#define SWAP_XOR(a, b) \
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do \
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{ \
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(((b) ^= (a) ^= (b), (a) ^= (b))); \
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} while(0);
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/**@brief Compare two number and take care of overflow threshold limit.
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*/
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#define COMPARE_WITH_THRESHOLD(a, b, threshold) \
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(((LL_MAX((a), (b)) - LL_MIN((a), (b))) < (threshold)) ? ((a) >= (b) ? 1 : 0) : ((a) > (b) ? 0 : 1))
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#define ROUND_MASK(a) ((a) - 1)
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#define ROUND_UP(x, a) (((x) + ROUND_MASK(a)) & ~ROUND_MASK(a))
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#define ROUND_DOWN(x, a) ((x) & ~ROUND_MASK(a))
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/**@brief Dereferences input pointer \a y as a type \a x.
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*
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* @param[in] x type name.
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* @param[in] y pointer name.
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*/
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#define DEREF_VOID_PTR_AS(x, y) (*(x *)y)
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/**@brief Extends some bit value to the left extending 2's complement value
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* to 8-bit length.
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*
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* @param[out] result variable, where result is store to.
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* @param[in] x input value.
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* @param[in] sign_pos an integer in range 2..6 specifying bit position of sign bit.
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*/
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#define SIGN_EXTENSION(result, x, sign_pos) \
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do \
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{ \
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result = x & (1 << sign_pos) ? \
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x | (~((1 << (sign_pos + 1)) - 1)) : \
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x & ((1 << (sign_pos + 1)) - 1); \
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} while (0)
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/**@brief Clears some most significant bits of integer value reducing it precision.
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* Name and interface of the macro emphasizes complementary action to #SIGN_EXTENSION.
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*
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* @param[out] result variable, where result is store to.
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* @param[in] x input value.
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* @param[in] sign_pos an integer in range 2..6 specifying bit position of sign bit.
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*/
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#define SIGN_COMPRESSION(result, x, sign_pos) \
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do \
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{ \
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result = x & ((1 << (sign_pos + 1)) - 1); \
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} while (0)
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/************************* PROTOTYPES **************************************************/
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/**@brief Swaps values of two bytes.
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*
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*/
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static inline void SWAP8(uint8_t * const x, uint8_t * const y)
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{
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uint8_t _x = *x;
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*x = *y;
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*y = _x;
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}
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/**@brief Swaps values of two double words (DWORD).
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*
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*/
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static inline void SWAP32(uint32_t * const x, uint32_t * const y)
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{
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uint32_t _x = *x;
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*x = *y;
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*y = _x;
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}
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/**@brief Swaps values of two arrays.
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*
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* @param[inout] x array pointer
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* @param[inout] y array pointer
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* @param[in] length amount of bytes to swap
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*/
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static inline void SWAP_ARRAYS(void * x, void * y, uint32_t length)
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{
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uint8_t *_x = (uint8_t *)(void *)x;
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uint8_t *_y = (uint8_t *)(void *)y;
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if (0x0 == ((((size_t)_x) | ((size_t)_y)) & 0x3))
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{
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size_t len4 = length / sizeof(uint32_t);
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for (size_t i = 0; i < len4; i++)
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{
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SWAP32((uint32_t*)_x, (uint32_t*)_y);
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_x += sizeof(uint32_t);
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_y += sizeof(uint32_t);
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}
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length &= 0x3;
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}
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for (size_t i = 0; i < length; i++)
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{
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SWAP8(_x, _y);
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_x++;
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_y++;
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}
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}
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/**@brief Find the first bit of the bitmap with the given value
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* (one or zero, as specified).
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*
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* @param[in] p_bitmap Pointer to bitmap.
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* @param[in] bitmap_size Number of bits in the bitmap.
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* @param[in] bit_value The bit value to find (one or zero).
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*
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* @retval Bit position of the bit with specified value, or bitmap_size if no such bit
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* was found.
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*/
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static inline size_t bitmap_find_bit(uint8_t * p_bitmap, size_t bitmap_size, uint8_t bit_value)
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{
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#if (defined(__GNUC__) && !defined(__SES_ARM))
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if (bitmap_size <= 32)
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{
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uint32_t bitmap;
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memcpy(&bitmap, p_bitmap, sizeof(uint32_t));
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if (!bit_value)
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{
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bitmap ^= 0xFFFFFFFF;
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}
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size_t result = ffs(bitmap);
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if (result == 0 || result > bitmap_size)
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{
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return bitmap_size;
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}
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// built-in ffs implementation gives ffs(1) = 1, not 0
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return result - 1;
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}
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else
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#endif
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{
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for (size_t i = 0; i < bitmap_size; i++)
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{
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if (BITMAP_ISSET(p_bitmap, i) == bit_value)
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{
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return i;
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}
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}
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return bitmap_size;
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}
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}
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/**@brief Reverse the elements of array
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*
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* @param[in] ptr Pointer to array.
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* @param[in] len Length of array.
|
|
*/
|
|
static inline void array_reverse(uint8_t * ptr, size_t len)
|
|
{
|
|
for (size_t i = 0; i < len/2; i++)
|
|
{
|
|
SWAP_XOR(ptr[i], ptr[len - 1 - i]);
|
|
}
|
|
}
|
|
|
|
/**@brief Returns least significant byte of word.
|
|
*/
|
|
#define LSB_WORD(x) ((uint8_t)(x & 0xFF))
|
|
|
|
/**@brief Returns least significant byte of halfword.
|
|
*/
|
|
#define LSB_HWORD(x) LSB_WORD(x)
|
|
|
|
/**@brief Returns most significant byte of halfword.
|
|
*/
|
|
#define MSB_HWORD(x) ((uint8_t)(x >> 8))
|
|
|
|
#define ALIGN_VALUE (sizeof(size_t))
|
|
|
|
/**@brief Compiler-independent definitions.
|
|
*/
|
|
#if defined ( __CC_ARM )
|
|
|
|
#ifndef __WEAK
|
|
#define __WEAK __weak
|
|
#endif
|
|
|
|
#ifndef PACK
|
|
#define PACK __attribute__ ((packed))
|
|
#endif
|
|
|
|
#ifndef BEGIN_PACK
|
|
#define BEGIN_PACK
|
|
#endif
|
|
|
|
#ifndef END_PACK
|
|
#define END_PACK
|
|
#endif
|
|
|
|
#ifndef __ALIGN
|
|
#define __ALIGN(n) __align(n)
|
|
#endif
|
|
|
|
#elif defined ( __ICCARM__ )
|
|
|
|
#ifndef __WEAK
|
|
#define __WEAK __weak
|
|
#endif
|
|
|
|
#ifndef PACK
|
|
#define PACK
|
|
#endif
|
|
|
|
#ifndef BEGIN_PACK
|
|
#define BEGIN_PACK _Pragma("pack(push, 1)")
|
|
#endif
|
|
|
|
#ifndef END_PACK
|
|
#define END_PACK _Pragma("pack(pop)")
|
|
#endif
|
|
|
|
#ifndef __ALIGN
|
|
#define __ALIGN(n)
|
|
#endif
|
|
|
|
#elif defined ( __GNUC__ )
|
|
|
|
#ifndef __WEAK
|
|
#define __WEAK __attribute__((weak))
|
|
#endif
|
|
|
|
#ifndef PACK
|
|
#define PACK __attribute__ ((packed))
|
|
#endif
|
|
|
|
#ifndef BEGIN_PACK
|
|
#define BEGIN_PACK _Pragma("pack(push,1)")
|
|
|
|
#endif
|
|
|
|
#ifndef END_PACK
|
|
#define END_PACK _Pragma("pack(pop)")
|
|
#endif
|
|
|
|
#ifndef __ALIGN
|
|
#define __ALIGN(n) __attribute__((aligned(n)))
|
|
#endif
|
|
|
|
#elif defined ( __TASKING__ )
|
|
|
|
#ifndef __WEAK
|
|
#define __WEAK __attribute__((weak))
|
|
#endif
|
|
|
|
#ifndef PACK
|
|
#define PACK __attribute__ ((packed))
|
|
#endif
|
|
|
|
#ifndef BEGIN_PACK
|
|
#define BEGIN_PACK
|
|
#endif
|
|
|
|
#ifndef END_PACK
|
|
#define END_PACK
|
|
#endif
|
|
|
|
#ifndef __ALIGN
|
|
#define __ALIGN(n) __align(n)
|
|
#endif
|
|
|
|
#endif
|
|
|
|
/** @} */
|
|
|
|
#endif /* SYS_UTILS_H_INCLUDED */
|