69 lines
2.6 KiB
C
69 lines
2.6 KiB
C
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/*
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* Copyright (c) 2020, The OpenThread Authors.
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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
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* modification, are permitted provided that the following conditions are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the copyright holder nor the
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* names of its contributors may be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER 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
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/**
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* @file
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* This file includes macros for validating runtime conditions.
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*/
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#ifndef PLATFORM_UTILS_ENCODING_H
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#define PLATFORM_UTILS_ENCODING_H
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#include <stdint.h>
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/**
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* Converts a 64-bit unsigned integer stored as a little-endian byte
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* array to uint64_t.
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*
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* Allows for the array to be byte-aligned, so that loading the
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* uint64_t value via this function avoids a processor exception due
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* to unaligned access.
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*
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* @param[in] aSource The byte array.
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*
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* @returns The 64-bit value as a uint64_t.
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*
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*/
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static inline uint64_t otEncodingReadUint64Le(const uint8_t *aSource)
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{
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uint64_t value = 0;
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value |= (uint64_t)aSource[0];
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value |= ((uint64_t)aSource[1]) << 8;
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value |= ((uint64_t)aSource[2]) << 16;
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value |= ((uint64_t)aSource[3]) << 24;
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value |= ((uint64_t)aSource[4]) << 32;
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value |= ((uint64_t)aSource[5]) << 40;
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value |= ((uint64_t)aSource[6]) << 48;
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value |= ((uint64_t)aSource[7]) << 56;
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return value;
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}
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#endif // PLATFORM_UTILS_ENCODING_H
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