/*
 * Copyright (C) 2007-2023 Xagasoft, All rights reserved.
 *
 * This file is part of the libbu++ library and is released under the
 * terms of the license contained in the file LICENSE.
 */

#include "bu/pearsonhash.h"
#include "bu/stream.h"

uint8_t Bu::PearsonHash::aSBox[] = {
    251, 175, 119, 215, 81, 14, 79, 191, 103, 49, 181, 143, 186, 157, 0,
    232, 31, 32, 55, 60, 152, 58, 17, 237, 174, 70, 160, 144, 220, 90, 57,
    223, 59, 3, 18, 140, 111, 166, 203, 196, 134, 243, 124, 95, 222, 179,
    197, 65, 180, 48, 36, 15, 107, 46, 233, 130, 165, 30, 123, 161, 209, 23,
    97, 16, 40, 91, 219, 61, 100, 10, 210, 109, 250, 127, 22, 138, 29, 108,
    244, 67, 207, 9, 178, 204, 74, 98, 126, 249, 167, 116, 34, 77, 193,
    200, 121, 5, 20, 113, 71, 35, 128, 13, 182, 94, 25, 226, 227, 199, 75,
    27, 41, 245, 230, 224, 43, 225, 177, 26, 155, 150, 212, 142, 218, 115,
    241, 73, 88, 105, 39, 114, 62, 255, 192, 201, 145, 214, 168, 158, 221,
    148, 154, 122, 12, 84, 82, 163, 44, 139, 228, 236, 205, 242, 217, 11,
    187, 146, 159, 64, 86, 239, 195, 42, 106, 198, 118, 112, 184, 172, 87,
    2, 173, 117, 176, 229, 247, 253, 137, 185, 99, 164, 102, 147, 45, 66,
    231, 52, 141, 211, 194, 206, 246, 238, 56, 110, 78, 248, 63, 240, 189,
    93, 92, 51, 53, 183, 19, 171, 72, 50, 33, 104, 101, 69, 8, 252, 83, 120,
    76, 135, 85, 54, 202, 125, 188, 213, 96, 235, 136, 208, 162, 129, 190,
    132, 156, 38, 47, 1, 7, 254, 24, 4, 216, 131, 89, 21, 28, 133, 37, 153,
    149, 80, 170, 68, 6, 169, 234, 151
};

Bu::PearsonHash::PearsonHash()
{
    reset();
}

Bu::PearsonHash::~PearsonHash()
{
}

void Bu::PearsonHash::reset()
{
    iValue = 0;
}

void Bu::PearsonHash::setSalt( const Bu::String & /*sSalt*/ )
{
}

void Bu::PearsonHash::addData( const void *sData, int iSize )
{
    for( int j = 0; j < iSize; j++ )
    {
        iValue = aSBox[ iValue^((unsigned char *)sData)[j] ];
    }
}

Bu::String Bu::PearsonHash::getResult()
{
    return Bu::String((char)iValue);
}

void Bu::PearsonHash::writeResult( Stream &sOut )
{
    sOut.write( &iValue, 1 );
}