/*!
 *
 * Copyright (c) 2019-2024 Diality Inc. - All Rights Reserved.
 * \copyright
 * THIS CODE MAY NOT BE COPIED OR REPRODUCED IN ANY FORM, IN PART OR IN
 * WHOLE, WITHOUT THE EXPLICIT PERMISSION OF THE COPYRIGHT OWNER.
 *
 * \file    crc.cpp
 * \author  (last)      Behrouz NematiPour
 * \date    (last)      05-Sep-2020
 * \author  (original)  Behrouz NematiPour
 * \date    (original)  16-Dec-2019
 *
 */

#include "crc.h"

/*!
 * \brief   The CRC table
 * \details This code has been borrowed from Firmware repository
 *          This should be exactly the same replica of that copy.
 *          PLEASE DO UPDATE ON ANY MODIFICATION IN FIRMWARE
 */
const unsigned char crc8_table[] = {
      0,  49,  98,  83, 196, 245, 166, 151, 185, 136, 219, 234, 125,  76,  31,  46,
     67, 114,  33,  16, 135, 182, 229, 212, 250, 203, 152, 169,  62,  15,  92, 109,
    134, 183, 228, 213,  66, 115,  32,  17,  63,  14,  93, 108, 251, 202, 153, 168,
    197, 244, 167, 150,   1,  48,  99,  82, 124,  77,  30,  47, 184, 137, 218, 235,
     61,  12,  95, 110, 249, 200, 155, 170, 132, 181, 230, 215,  64, 113,  34,  19,
    126,  79,  28,  45, 186, 139, 216, 233, 199, 246, 165, 148,   3,  50,  97,  80,
    187, 138, 217, 232, 127,  78,  29,  44,   2,  51,  96,  81, 198, 247, 164, 149,
    248, 201, 154, 171,  60,  13,  94, 111,  65, 112,  35,  18, 133, 180, 231, 214,
    122,  75,  24,  41, 190, 143, 220, 237, 195, 242, 161, 144,   7,  54, 101,  84,
     57,   8,  91, 106, 253, 204, 159, 174, 128, 177, 226, 211,  68, 117,  38,  23,
    252, 205, 158, 175,  56,   9,  90, 107,  69, 116,  39,  22, 129, 176, 227, 210,
    191, 142, 221, 236, 123,  74,  25,  40,   6,  55, 100,  85, 194, 243, 160, 145,
     71, 118,  37,  20, 131, 178, 225, 208, 254, 207, 156, 173,  58,  11,  88, 105,
      4,  53, 102,  87, 192, 241, 162, 147, 189, 140, 223, 238, 121,  72,  27,  42,
    193, 240, 163, 146,   5,  52, 103,  86, 120,  73,  26,  43, 188, 141, 222, 239,
    130, 179, 224, 209,  70, 119,  36,  21,  59,  10,  89, 104, 255, 206, 157, 172
};

/*!
 * \brief   crc8
 * \param   vData the data which to be used for crc8 generation
 * \return  a byte contains the generated crc8.
 * \note    this algorithm borrowed from Firmware repository
 *          some modification has been made to be able to work with Qt libraries.
 */
quint8 crc8(const QByteArray &vData)
{
    quint8  crc = 0;
    int     len = vData.length();
    int     i   = 0;
    while ( len-- > 0 )
    {
        crc = crc8_table[ (static_cast<quint8>(vData[i])) ^ crc ];
        i++;
    }
    return crc;
}