arith__uint256__tests_8cpp_source.html

// Copyright (c) 2011-2020 The Bitcoin Core developers

// Distributed under the MIT software license, see the accompanying

// file COPYING or http://www.opensource.org/licenses/mit-license.php.


#include <arith_uint256.h>

#include <uint256.h>


#include <boost/test/unit_test.hpp>


#include <cmath>

#include <cstdint>

#include <iomanip>

#include <limits>

#include <sstream>

#include <string>

#include <vector>


BOOST_AUTO_TEST_SUITE(arith_uint256_tests)


static inline arith_uint256 arith_uint256V(const std::vector<unsigned char>& vch)

{

    return UintToArith256(uint256(vch));

}


const unsigned char R1Array[] =

    "\x9c\x52\x4a\xdb\xcf\x56\x11\x12\x2b\x29\x12\x5e\x5d\x35\xd2\xd2"

    "\x22\x81\xaa\xb5\x33\xf0\x08\x32\xd5\x56\xb1\xf9\xea\xe5\x1d\x7d";

const char R1ArrayHex[] = "7D1DE5EAF9B156D53208F033B5AA8122D2d2355d5e12292b121156cfdb4a529c";

const double R1Ldouble = 0.4887374590559308955; // R1L equals roughly R1Ldouble * 2^256

const arith_uint256 R1L = arith_uint256V(std::vector<unsigned char>(R1Array,R1Array+32));

const uint64_t R1LLow64 = 0x121156cfdb4a529cULL;


const unsigned char R2Array[] =

    "\x70\x32\x1d\x7c\x47\xa5\x6b\x40\x26\x7e\x0a\xc3\xa6\x9c\xb6\xbf"

    "\x13\x30\x47\xa3\x19\x2d\xda\x71\x49\x13\x72\xf0\xb4\xca\x81\xd7";

const arith_uint256 R2L = arith_uint256V(std::vector<unsigned char>(R2Array,R2Array+32));


const char R1LplusR2L[] = "549FB09FEA236A1EA3E31D4D58F1B1369288D204211CA751527CFC175767850C";


const unsigned char ZeroArray[] =

    "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"

    "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00";

const arith_uint256 ZeroL = arith_uint256V(std::vector<unsigned char>(ZeroArray,ZeroArray+32));


const unsigned char OneArray[] =

    "\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"

    "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00";

const arith_uint256 OneL = arith_uint256V(std::vector<unsigned char>(OneArray,OneArray+32));


const unsigned char MaxArray[] =

    "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"

    "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff";

const arith_uint256 MaxL = arith_uint256V(std::vector<unsigned char>(MaxArray,MaxArray+32));


const arith_uint256 HalfL = (OneL << 255);

static std::string ArrayToString(const unsigned char A[], unsigned int width)

{

    std::stringstream Stream;

    Stream << std::hex;

    for (unsigned int i = 0; i < width; ++i)

    {

        Stream<<std::setw(2)<<std::setfill('0')<<(unsigned int)A[width-i-1];

    }

    return Stream.str();

}


BOOST_AUTO_TEST_CASE( basics ) // constructors, equality, inequality

{

    BOOST_CHECK(1 == 0+1);

    // constructor arith_uint256(vector<char>):

    BOOST_CHECK(R1L.ToString() == ArrayToString(R1Array,32));

    BOOST_CHECK(R2L.ToString() == ArrayToString(R2Array,32));

    BOOST_CHECK(ZeroL.ToString() == ArrayToString(ZeroArray,32));

    BOOST_CHECK(OneL.ToString() == ArrayToString(OneArray,32));

    BOOST_CHECK(MaxL.ToString() == ArrayToString(MaxArray,32));

    BOOST_CHECK(OneL.ToString() != ArrayToString(ZeroArray,32));


    // == and !=

    BOOST_CHECK(R1L != R2L);

    BOOST_CHECK(ZeroL != OneL);

    BOOST_CHECK(OneL != ZeroL);

    BOOST_CHECK(MaxL != ZeroL);

    BOOST_CHECK(~MaxL == ZeroL);

    BOOST_CHECK( ((R1L ^ R2L) ^ R1L) == R2L);


    uint64_t Tmp64 = 0xc4dab720d9c7acaaULL;

    for (unsigned int i = 0; i < 256; ++i)

    {

        BOOST_CHECK(ZeroL != (OneL << i));

        BOOST_CHECK((OneL << i) != ZeroL);

        BOOST_CHECK(R1L != (R1L ^ (OneL << i)));

        BOOST_CHECK(((arith_uint256(Tmp64) ^ (OneL << i) ) != Tmp64 ));

    }

    BOOST_CHECK(ZeroL == (OneL << 256));


    // String Constructor and Copy Constructor

    BOOST_CHECK(arith_uint256("0x"+R1L.ToString()) == R1L);

    BOOST_CHECK(arith_uint256("0x"+R2L.ToString()) == R2L);

    BOOST_CHECK(arith_uint256("0x"+ZeroL.ToString()) == ZeroL);

    BOOST_CHECK(arith_uint256("0x"+OneL.ToString()) == OneL);

    BOOST_CHECK(arith_uint256("0x"+MaxL.ToString()) == MaxL);

    BOOST_CHECK(arith_uint256(R1L.ToString()) == R1L);

    BOOST_CHECK(arith_uint256("   0x"+R1L.ToString()+"   ") == R1L);

    BOOST_CHECK(arith_uint256("") == ZeroL);

    BOOST_CHECK(R1L == arith_uint256(R1ArrayHex));

    BOOST_CHECK(arith_uint256(R1L) == R1L);

    BOOST_CHECK((arith_uint256(R1L^R2L)^R2L) == R1L);

    BOOST_CHECK(arith_uint256(ZeroL) == ZeroL);

    BOOST_CHECK(arith_uint256(OneL) == OneL);


    // uint64_t constructor

    BOOST_CHECK( (R1L & arith_uint256("0xffffffffffffffff")) == arith_uint256(R1LLow64));

    BOOST_CHECK(ZeroL == arith_uint256(0));

    BOOST_CHECK(OneL == arith_uint256(1));

    BOOST_CHECK(arith_uint256("0xffffffffffffffff") == arith_uint256(0xffffffffffffffffULL));


    // Assignment (from base_uint)

    arith_uint256 tmpL = ~ZeroL; BOOST_CHECK(tmpL == ~ZeroL);

    tmpL = ~OneL; BOOST_CHECK(tmpL == ~OneL);

    tmpL = ~R1L; BOOST_CHECK(tmpL == ~R1L);

    tmpL = ~R2L; BOOST_CHECK(tmpL == ~R2L);

    tmpL = ~MaxL; BOOST_CHECK(tmpL == ~MaxL);

}


static void shiftArrayRight(unsigned char* to, const unsigned char* from, unsigned int arrayLength, unsigned int bitsToShift)

{

    for (unsigned int T=0; T < arrayLength; ++T)

    {

        unsigned int F = (T+bitsToShift/8);

        if (F < arrayLength)

            to[T]  = from[F] >> (bitsToShift%8);

        else

            to[T] = 0;

        if (F + 1 < arrayLength)

            to[T] |= from[(F+1)] << (8-bitsToShift%8);

    }

}


static void shiftArrayLeft(unsigned char* to, const unsigned char* from, unsigned int arrayLength, unsigned int bitsToShift)

{

    for (unsigned int T=0; T < arrayLength; ++T)

    {

        if (T >= bitsToShift/8)

        {

            unsigned int F = T-bitsToShift/8;

            to[T]  = from[F] << (bitsToShift%8);

            if (T >= bitsToShift/8+1)

                to[T] |= from[F-1] >> (8-bitsToShift%8);

        }

        else {

            to[T] = 0;

        }

    }

}


BOOST_AUTO_TEST_CASE( shifts ) { // "<<"  ">>"  "<<="  ">>="

    unsigned char TmpArray[32];

    arith_uint256 TmpL;

    for (unsigned int i = 0; i < 256; ++i)

    {

        shiftArrayLeft(TmpArray, OneArray, 32, i);

        BOOST_CHECK(arith_uint256V(std::vector<unsigned char>(TmpArray,TmpArray+32)) == (OneL << i));

        TmpL = OneL; TmpL <<= i;

        BOOST_CHECK(TmpL == (OneL << i));

        BOOST_CHECK((HalfL >> (255-i)) == (OneL << i));

        TmpL = HalfL; TmpL >>= (255-i);

        BOOST_CHECK(TmpL == (OneL << i));


        shiftArrayLeft(TmpArray, R1Array, 32, i);

        BOOST_CHECK(arith_uint256V(std::vector<unsigned char>(TmpArray,TmpArray+32)) == (R1L << i));

        TmpL = R1L; TmpL <<= i;

        BOOST_CHECK(TmpL == (R1L << i));


        shiftArrayRight(TmpArray, R1Array, 32, i);

        BOOST_CHECK(arith_uint256V(std::vector<unsigned char>(TmpArray,TmpArray+32)) == (R1L >> i));

        TmpL = R1L; TmpL >>= i;

        BOOST_CHECK(TmpL == (R1L >> i));


        shiftArrayLeft(TmpArray, MaxArray, 32, i);

        BOOST_CHECK(arith_uint256V(std::vector<unsigned char>(TmpArray,TmpArray+32)) == (MaxL << i));

        TmpL = MaxL; TmpL <<= i;

        BOOST_CHECK(TmpL == (MaxL << i));


        shiftArrayRight(TmpArray, MaxArray, 32, i);

        BOOST_CHECK(arith_uint256V(std::vector<unsigned char>(TmpArray,TmpArray+32)) == (MaxL >> i));

        TmpL = MaxL; TmpL >>= i;

        BOOST_CHECK(TmpL == (MaxL >> i));

    }

    arith_uint256 c1L = arith_uint256(0x0123456789abcdefULL);

    arith_uint256 c2L = c1L << 128;

    for (unsigned int i = 0; i < 128; ++i) {

        BOOST_CHECK((c1L << i) == (c2L >> (128-i)));

    }

    for (unsigned int i = 128; i < 256; ++i) {

        BOOST_CHECK((c1L << i) == (c2L << (i-128)));

    }

}


BOOST_AUTO_TEST_CASE( unaryOperators ) // !    ~    -

{

    BOOST_CHECK(~ZeroL == MaxL);


    unsigned char TmpArray[32];

    for (unsigned int i = 0; i < 32; ++i) { TmpArray[i] = ~R1Array[i]; }

    BOOST_CHECK(arith_uint256V(std::vector<unsigned char>(TmpArray,TmpArray+32)) == (~R1L));


    BOOST_CHECK(-ZeroL == ZeroL);

    BOOST_CHECK(-R1L == (~R1L)+1);

    for (unsigned int i = 0; i < 256; ++i)

        BOOST_CHECK(-(OneL<<i) == (MaxL << i));

}


// Check if doing _A_ _OP_ _B_ results in the same as applying _OP_ onto each

// element of Aarray and Barray, and then converting the result into an arith_uint256.

#define CHECKBITWISEOPERATOR(_A_,_B_,_OP_)                              \

    for (unsigned int i = 0; i < 32; ++i) { TmpArray[i] = _A_##Array[i] _OP_ _B_##Array[i]; } \

    BOOST_CHECK(arith_uint256V(std::vector<unsigned char>(TmpArray,TmpArray+32)) == (_A_##L _OP_ _B_##L));


#define CHECKASSIGNMENTOPERATOR(_A_,_B_,_OP_)                           \

    TmpL = _A_##L; TmpL _OP_##= _B_##L; BOOST_CHECK(TmpL == (_A_##L _OP_ _B_##L));


BOOST_AUTO_TEST_CASE( bitwiseOperators )

{

    unsigned char TmpArray[32];


    CHECKBITWISEOPERATOR(R1,R2,|)

    CHECKBITWISEOPERATOR(R1,R2,^)

    CHECKBITWISEOPERATOR(R1,R2,&)

    CHECKBITWISEOPERATOR(R1,Zero,|)

    CHECKBITWISEOPERATOR(R1,Zero,^)

    CHECKBITWISEOPERATOR(R1,Zero,&)

    CHECKBITWISEOPERATOR(R1,Max,|)

    CHECKBITWISEOPERATOR(R1,Max,^)

    CHECKBITWISEOPERATOR(R1,Max,&)

    CHECKBITWISEOPERATOR(Zero,R1,|)

    CHECKBITWISEOPERATOR(Zero,R1,^)

    CHECKBITWISEOPERATOR(Zero,R1,&)

    CHECKBITWISEOPERATOR(Max,R1,|)

    CHECKBITWISEOPERATOR(Max,R1,^)

    CHECKBITWISEOPERATOR(Max,R1,&)


    arith_uint256 TmpL;

    CHECKASSIGNMENTOPERATOR(R1,R2,|)

    CHECKASSIGNMENTOPERATOR(R1,R2,^)

    CHECKASSIGNMENTOPERATOR(R1,R2,&)

    CHECKASSIGNMENTOPERATOR(R1,Zero,|)

    CHECKASSIGNMENTOPERATOR(R1,Zero,^)

    CHECKASSIGNMENTOPERATOR(R1,Zero,&)

    CHECKASSIGNMENTOPERATOR(R1,Max,|)

    CHECKASSIGNMENTOPERATOR(R1,Max,^)

    CHECKASSIGNMENTOPERATOR(R1,Max,&)

    CHECKASSIGNMENTOPERATOR(Zero,R1,|)

    CHECKASSIGNMENTOPERATOR(Zero,R1,^)

    CHECKASSIGNMENTOPERATOR(Zero,R1,&)

    CHECKASSIGNMENTOPERATOR(Max,R1,|)

    CHECKASSIGNMENTOPERATOR(Max,R1,^)

    CHECKASSIGNMENTOPERATOR(Max,R1,&)


    uint64_t Tmp64 = 0xe1db685c9a0b47a2ULL;

    TmpL = R1L; TmpL |= Tmp64;  BOOST_CHECK(TmpL == (R1L | arith_uint256(Tmp64)));

    TmpL = R1L; TmpL |= 0; BOOST_CHECK(TmpL == R1L);

    TmpL ^= 0; BOOST_CHECK(TmpL == R1L);

    TmpL ^= Tmp64;  BOOST_CHECK(TmpL == (R1L ^ arith_uint256(Tmp64)));

}


BOOST_AUTO_TEST_CASE( comparison ) // <= >= < >

{

    arith_uint256 TmpL;

    for (unsigned int i = 0; i < 256; ++i) {

        TmpL= OneL<< i;

        BOOST_CHECK( TmpL >= ZeroL && TmpL > ZeroL && ZeroL < TmpL && ZeroL <= TmpL);

        BOOST_CHECK( TmpL >= 0 && TmpL > 0 && 0 < TmpL && 0 <= TmpL);

        TmpL |= R1L;

        BOOST_CHECK( TmpL >= R1L ); BOOST_CHECK( (TmpL == R1L) != (TmpL > R1L)); BOOST_CHECK( (TmpL == R1L) || !( TmpL <= R1L));

        BOOST_CHECK( R1L <= TmpL ); BOOST_CHECK( (R1L == TmpL) != (R1L < TmpL)); BOOST_CHECK( (TmpL == R1L) || !( R1L >= TmpL));

        BOOST_CHECK(! (TmpL < R1L)); BOOST_CHECK(! (R1L > TmpL));

    }

}


BOOST_AUTO_TEST_CASE( plusMinus )

{

    arith_uint256 TmpL = 0;

    BOOST_CHECK(R1L+R2L == arith_uint256(R1LplusR2L));

    TmpL += R1L;

    BOOST_CHECK(TmpL == R1L);

    TmpL += R2L;

    BOOST_CHECK(TmpL == R1L + R2L);

    BOOST_CHECK(OneL+MaxL == ZeroL);

    BOOST_CHECK(MaxL+OneL == ZeroL);

    for (unsigned int i = 1; i < 256; ++i) {

        BOOST_CHECK( (MaxL >> i) + OneL == (HalfL >> (i-1)) );

        BOOST_CHECK( OneL + (MaxL >> i) == (HalfL >> (i-1)) );

        TmpL = (MaxL>>i); TmpL += OneL;

        BOOST_CHECK( TmpL == (HalfL >> (i-1)) );

        TmpL = (MaxL>>i); TmpL += 1;

        BOOST_CHECK( TmpL == (HalfL >> (i-1)) );

        TmpL = (MaxL>>i);

        BOOST_CHECK( TmpL++ == (MaxL>>i) );

        BOOST_CHECK( TmpL == (HalfL >> (i-1)));

    }

    BOOST_CHECK(arith_uint256(0xbedc77e27940a7ULL) + 0xee8d836fce66fbULL == arith_uint256(0xbedc77e27940a7ULL + 0xee8d836fce66fbULL));

    TmpL = arith_uint256(0xbedc77e27940a7ULL); TmpL += 0xee8d836fce66fbULL;

    BOOST_CHECK(TmpL == arith_uint256(0xbedc77e27940a7ULL+0xee8d836fce66fbULL));

    TmpL -= 0xee8d836fce66fbULL;  BOOST_CHECK(TmpL == 0xbedc77e27940a7ULL);

    TmpL = R1L;

    BOOST_CHECK(++TmpL == R1L+1);


    BOOST_CHECK(R1L -(-R2L) == R1L+R2L);

    BOOST_CHECK(R1L -(-OneL) == R1L+OneL);

    BOOST_CHECK(R1L - OneL == R1L+(-OneL));

    for (unsigned int i = 1; i < 256; ++i) {

        BOOST_CHECK((MaxL>>i) - (-OneL)  == (HalfL >> (i-1)));

        BOOST_CHECK((HalfL >> (i-1)) - OneL == (MaxL>>i));

        TmpL = (HalfL >> (i-1));

        BOOST_CHECK(TmpL-- == (HalfL >> (i-1)));

        BOOST_CHECK(TmpL == (MaxL >> i));

        TmpL = (HalfL >> (i-1));

        BOOST_CHECK(--TmpL == (MaxL >> i));

    }

    TmpL = R1L;

    BOOST_CHECK(--TmpL == R1L-1);

}


BOOST_AUTO_TEST_CASE( multiply )

{

    BOOST_CHECK((R1L * R1L).ToString() == "62a38c0486f01e45879d7910a7761bf30d5237e9873f9bff3642a732c4d84f10");

    BOOST_CHECK((R1L * R2L).ToString() == "de37805e9986996cfba76ff6ba51c008df851987d9dd323f0e5de07760529c40");

    BOOST_CHECK((R1L * ZeroL) == ZeroL);

    BOOST_CHECK((R1L * OneL) == R1L);

    BOOST_CHECK((R1L * MaxL) == -R1L);

    BOOST_CHECK((R2L * R1L) == (R1L * R2L));

    BOOST_CHECK((R2L * R2L).ToString() == "ac8c010096767d3cae5005dec28bb2b45a1d85ab7996ccd3e102a650f74ff100");

    BOOST_CHECK((R2L * ZeroL) == ZeroL);

    BOOST_CHECK((R2L * OneL) == R2L);

    BOOST_CHECK((R2L * MaxL) == -R2L);


    BOOST_CHECK(MaxL * MaxL == OneL);


    BOOST_CHECK((R1L * 0) == 0);

    BOOST_CHECK((R1L * 1) == R1L);

    BOOST_CHECK((R1L * 3).ToString() == "7759b1c0ed14047f961ad09b20ff83687876a0181a367b813634046f91def7d4");

    BOOST_CHECK((R2L * 0x87654321UL).ToString() == "23f7816e30c4ae2017257b7a0fa64d60402f5234d46e746b61c960d09a26d070");

}


BOOST_AUTO_TEST_CASE( divide )

{

    arith_uint256 D1L("AD7133AC1977FA2B7");

    arith_uint256 D2L("ECD751716");

    BOOST_CHECK((R1L / D1L).ToString() == "00000000000000000b8ac01106981635d9ed112290f8895545a7654dde28fb3a");

    BOOST_CHECK((R1L / D2L).ToString() == "000000000873ce8efec5b67150bad3aa8c5fcb70e947586153bf2cec7c37c57a");

    BOOST_CHECK(R1L / OneL == R1L);

    BOOST_CHECK(R1L / MaxL == ZeroL);

    BOOST_CHECK(MaxL / R1L == 2);

    BOOST_CHECK_THROW(R1L / ZeroL, uint_error);

    BOOST_CHECK((R2L / D1L).ToString() == "000000000000000013e1665895a1cc981de6d93670105a6b3ec3b73141b3a3c5");

    BOOST_CHECK((R2L / D2L).ToString() == "000000000e8f0abe753bb0afe2e9437ee85d280be60882cf0bd1aaf7fa3cc2c4");

    BOOST_CHECK(R2L / OneL == R2L);

    BOOST_CHECK(R2L / MaxL == ZeroL);

    BOOST_CHECK(MaxL / R2L == 1);

    BOOST_CHECK_THROW(R2L / ZeroL, uint_error);

}


static bool almostEqual(double d1, double d2)

{

    return fabs(d1-d2) <= 4*fabs(d1)*std::numeric_limits<double>::epsilon();

}


BOOST_AUTO_TEST_CASE( methods ) // GetHex SetHex size() GetLow64 GetSerializeSize, Serialize, Unserialize

{

    BOOST_CHECK(R1L.GetHex() == R1L.ToString());

    BOOST_CHECK(R2L.GetHex() == R2L.ToString());

    BOOST_CHECK(OneL.GetHex() == OneL.ToString());

    BOOST_CHECK(MaxL.GetHex() == MaxL.ToString());

    arith_uint256 TmpL(R1L);

    BOOST_CHECK(TmpL == R1L);

    TmpL.SetHex(R2L.ToString());   BOOST_CHECK(TmpL == R2L);

    TmpL.SetHex(ZeroL.ToString()); BOOST_CHECK(TmpL == 0);

    TmpL.SetHex(HalfL.ToString()); BOOST_CHECK(TmpL == HalfL);


    TmpL.SetHex(R1L.ToString());

    BOOST_CHECK(R1L.size() == 32);

    BOOST_CHECK(R2L.size() == 32);

    BOOST_CHECK(ZeroL.size() == 32);

    BOOST_CHECK(MaxL.size() == 32);

    BOOST_CHECK(R1L.GetLow64()  == R1LLow64);

    BOOST_CHECK(HalfL.GetLow64() ==0x0000000000000000ULL);

    BOOST_CHECK(OneL.GetLow64() ==0x0000000000000001ULL);


    for (unsigned int i = 0; i < 255; ++i)

    {

        BOOST_CHECK((OneL << i).getdouble() == ldexp(1.0,i));

    }

    BOOST_CHECK(ZeroL.getdouble() == 0.0);

    for (int i = 256; i > 53; --i)

        BOOST_CHECK(almostEqual((R1L>>(256-i)).getdouble(), ldexp(R1Ldouble,i)));

    uint64_t R1L64part = (R1L>>192).GetLow64();

    for (int i = 53; i > 0; --i) // doubles can store all integers in {0,...,2^54-1} exactly

    {

        BOOST_CHECK((R1L>>(256-i)).getdouble() == (double)(R1L64part >> (64-i)));

    }

}


BOOST_AUTO_TEST_CASE(bignum_SetCompact)

{

    arith_uint256 num;

    bool fNegative;

    bool fOverflow;

    num.SetCompact(0, &fNegative, &fOverflow);

    BOOST_CHECK_EQUAL(num.GetHex(), "0000000000000000000000000000000000000000000000000000000000000000");

    BOOST_CHECK_EQUAL(num.GetCompact(), 0U);

    BOOST_CHECK_EQUAL(fNegative, false);

    BOOST_CHECK_EQUAL(fOverflow, false);


    num.SetCompact(0x00123456, &fNegative, &fOverflow);

    BOOST_CHECK_EQUAL(num.GetHex(), "0000000000000000000000000000000000000000000000000000000000000000");

    BOOST_CHECK_EQUAL(num.GetCompact(), 0U);

    BOOST_CHECK_EQUAL(fNegative, false);

    BOOST_CHECK_EQUAL(fOverflow, false);


    num.SetCompact(0x01003456, &fNegative, &fOverflow);

    BOOST_CHECK_EQUAL(num.GetHex(), "0000000000000000000000000000000000000000000000000000000000000000");

    BOOST_CHECK_EQUAL(num.GetCompact(), 0U);

    BOOST_CHECK_EQUAL(fNegative, false);

    BOOST_CHECK_EQUAL(fOverflow, false);


    num.SetCompact(0x02000056, &fNegative, &fOverflow);

    BOOST_CHECK_EQUAL(num.GetHex(), "0000000000000000000000000000000000000000000000000000000000000000");

    BOOST_CHECK_EQUAL(num.GetCompact(), 0U);

    BOOST_CHECK_EQUAL(fNegative, false);

    BOOST_CHECK_EQUAL(fOverflow, false);


    num.SetCompact(0x03000000, &fNegative, &fOverflow);

    BOOST_CHECK_EQUAL(num.GetHex(), "0000000000000000000000000000000000000000000000000000000000000000");

    BOOST_CHECK_EQUAL(num.GetCompact(), 0U);

    BOOST_CHECK_EQUAL(fNegative, false);

    BOOST_CHECK_EQUAL(fOverflow, false);


    num.SetCompact(0x04000000, &fNegative, &fOverflow);

    BOOST_CHECK_EQUAL(num.GetHex(), "0000000000000000000000000000000000000000000000000000000000000000");

    BOOST_CHECK_EQUAL(num.GetCompact(), 0U);

    BOOST_CHECK_EQUAL(fNegative, false);

    BOOST_CHECK_EQUAL(fOverflow, false);


    num.SetCompact(0x00923456, &fNegative, &fOverflow);

    BOOST_CHECK_EQUAL(num.GetHex(), "0000000000000000000000000000000000000000000000000000000000000000");

    BOOST_CHECK_EQUAL(num.GetCompact(), 0U);

    BOOST_CHECK_EQUAL(fNegative, false);

    BOOST_CHECK_EQUAL(fOverflow, false);


    num.SetCompact(0x01803456, &fNegative, &fOverflow);

    BOOST_CHECK_EQUAL(num.GetHex(), "0000000000000000000000000000000000000000000000000000000000000000");

    BOOST_CHECK_EQUAL(num.GetCompact(), 0U);

    BOOST_CHECK_EQUAL(fNegative, false);

    BOOST_CHECK_EQUAL(fOverflow, false);


    num.SetCompact(0x02800056, &fNegative, &fOverflow);

    BOOST_CHECK_EQUAL(num.GetHex(), "0000000000000000000000000000000000000000000000000000000000000000");

    BOOST_CHECK_EQUAL(num.GetCompact(), 0U);

    BOOST_CHECK_EQUAL(fNegative, false);

    BOOST_CHECK_EQUAL(fOverflow, false);


    num.SetCompact(0x03800000, &fNegative, &fOverflow);

    BOOST_CHECK_EQUAL(num.GetHex(), "0000000000000000000000000000000000000000000000000000000000000000");

    BOOST_CHECK_EQUAL(num.GetCompact(), 0U);

    BOOST_CHECK_EQUAL(fNegative, false);

    BOOST_CHECK_EQUAL(fOverflow, false);


    num.SetCompact(0x04800000, &fNegative, &fOverflow);

    BOOST_CHECK_EQUAL(num.GetHex(), "0000000000000000000000000000000000000000000000000000000000000000");

    BOOST_CHECK_EQUAL(num.GetCompact(), 0U);

    BOOST_CHECK_EQUAL(fNegative, false);

    BOOST_CHECK_EQUAL(fOverflow, false);


    num.SetCompact(0x01123456, &fNegative, &fOverflow);

    BOOST_CHECK_EQUAL(num.GetHex(), "0000000000000000000000000000000000000000000000000000000000000012");

    BOOST_CHECK_EQUAL(num.GetCompact(), 0x01120000U);

    BOOST_CHECK_EQUAL(fNegative, false);

    BOOST_CHECK_EQUAL(fOverflow, false);


    // Make sure that we don't generate compacts with the 0x00800000 bit set

    num = 0x80;

    BOOST_CHECK_EQUAL(num.GetCompact(), 0x02008000U);


    num.SetCompact(0x01fedcba, &fNegative, &fOverflow);

    BOOST_CHECK_EQUAL(num.GetHex(), "000000000000000000000000000000000000000000000000000000000000007e");

    BOOST_CHECK_EQUAL(num.GetCompact(true), 0x01fe0000U);

    BOOST_CHECK_EQUAL(fNegative, true);

    BOOST_CHECK_EQUAL(fOverflow, false);


    num.SetCompact(0x02123456, &fNegative, &fOverflow);

    BOOST_CHECK_EQUAL(num.GetHex(), "0000000000000000000000000000000000000000000000000000000000001234");

    BOOST_CHECK_EQUAL(num.GetCompact(), 0x02123400U);

    BOOST_CHECK_EQUAL(fNegative, false);

    BOOST_CHECK_EQUAL(fOverflow, false);


    num.SetCompact(0x03123456, &fNegative, &fOverflow);

    BOOST_CHECK_EQUAL(num.GetHex(), "0000000000000000000000000000000000000000000000000000000000123456");

    BOOST_CHECK_EQUAL(num.GetCompact(), 0x03123456U);

    BOOST_CHECK_EQUAL(fNegative, false);

    BOOST_CHECK_EQUAL(fOverflow, false);


    num.SetCompact(0x04123456, &fNegative, &fOverflow);

    BOOST_CHECK_EQUAL(num.GetHex(), "0000000000000000000000000000000000000000000000000000000012345600");

    BOOST_CHECK_EQUAL(num.GetCompact(), 0x04123456U);

    BOOST_CHECK_EQUAL(fNegative, false);

    BOOST_CHECK_EQUAL(fOverflow, false);


    num.SetCompact(0x04923456, &fNegative, &fOverflow);

    BOOST_CHECK_EQUAL(num.GetHex(), "0000000000000000000000000000000000000000000000000000000012345600");

    BOOST_CHECK_EQUAL(num.GetCompact(true), 0x04923456U);

    BOOST_CHECK_EQUAL(fNegative, true);

    BOOST_CHECK_EQUAL(fOverflow, false);


    num.SetCompact(0x05009234, &fNegative, &fOverflow);

    BOOST_CHECK_EQUAL(num.GetHex(), "0000000000000000000000000000000000000000000000000000000092340000");

    BOOST_CHECK_EQUAL(num.GetCompact(), 0x05009234U);

    BOOST_CHECK_EQUAL(fNegative, false);

    BOOST_CHECK_EQUAL(fOverflow, false);


    num.SetCompact(0x20123456, &fNegative, &fOverflow);

    BOOST_CHECK_EQUAL(num.GetHex(), "1234560000000000000000000000000000000000000000000000000000000000");

    BOOST_CHECK_EQUAL(num.GetCompact(), 0x20123456U);

    BOOST_CHECK_EQUAL(fNegative, false);

    BOOST_CHECK_EQUAL(fOverflow, false);


    num.SetCompact(0xff123456, &fNegative, &fOverflow);

    BOOST_CHECK_EQUAL(fNegative, false);

    BOOST_CHECK_EQUAL(fOverflow, true);

}


BOOST_AUTO_TEST_CASE( getmaxcoverage ) // some more tests just to get 100% coverage

{

    // ~R1L give a base_uint<256>

    BOOST_CHECK((~~R1L >> 10) == (R1L >> 10));

    BOOST_CHECK((~~R1L << 10) == (R1L << 10));

    BOOST_CHECK(!(~~R1L < R1L));

    BOOST_CHECK(~~R1L <= R1L);

    BOOST_CHECK(!(~~R1L > R1L));

    BOOST_CHECK(~~R1L >= R1L);

    BOOST_CHECK(!(R1L < ~~R1L));

    BOOST_CHECK(R1L <= ~~R1L);

    BOOST_CHECK(!(R1L > ~~R1L));

    BOOST_CHECK(R1L >= ~~R1L);


    BOOST_CHECK(~~R1L + R2L == R1L + ~~R2L);

    BOOST_CHECK(~~R1L - R2L == R1L - ~~R2L);

    BOOST_CHECK(~R1L != R1L); BOOST_CHECK(R1L != ~R1L);

    unsigned char TmpArray[32];

    CHECKBITWISEOPERATOR(~R1,R2,|)

    CHECKBITWISEOPERATOR(~R1,R2,^)

    CHECKBITWISEOPERATOR(~R1,R2,&)

    CHECKBITWISEOPERATOR(R1,~R2,|)

    CHECKBITWISEOPERATOR(R1,~R2,^)

    CHECKBITWISEOPERATOR(R1,~R2,&)

}


BOOST_AUTO_TEST_SUITE_END()

UintToArith256
arith_uint256 UintToArith256(const uint256 &a)
Definition: arith_uint256.cpp:253

arith_uint256.h

shiftArrayLeft
static void shiftArrayLeft(unsigned char *to, const unsigned char *from, unsigned int arrayLength, unsigned int bitsToShift)
Definition: arith_uint256_tests.cpp:140

shiftArrayRight
static void shiftArrayRight(unsigned char *to, const unsigned char *from, unsigned int arrayLength, unsigned int bitsToShift)
Definition: arith_uint256_tests.cpp:126

OneL
const arith_uint256 OneL
Definition: arith_uint256_tests.cpp:49

CHECKBITWISEOPERATOR
#define CHECKBITWISEOPERATOR(_A_, _B_, _OP_)
Definition: arith_uint256_tests.cpp:217

MaxL
const arith_uint256 MaxL
Definition: arith_uint256_tests.cpp:54

CHECKASSIGNMENTOPERATOR
#define CHECKASSIGNMENTOPERATOR(_A_, _B_, _OP_)
Definition: arith_uint256_tests.cpp:221

R1L
const arith_uint256 R1L
Definition: arith_uint256_tests.cpp:31

ZeroArray
const unsigned char ZeroArray[]
Definition: arith_uint256_tests.cpp:41

R1LplusR2L
const char R1LplusR2L[]
Definition: arith_uint256_tests.cpp:39

R1Array
const unsigned char R1Array[]
Definition: arith_uint256_tests.cpp:26

R1LLow64
const uint64_t R1LLow64
Definition: arith_uint256_tests.cpp:32

BOOST_AUTO_TEST_CASE
BOOST_AUTO_TEST_CASE(basics)
Definition: arith_uint256_tests.cpp:68

HalfL
const arith_uint256 HalfL
Definition: arith_uint256_tests.cpp:56

OneArray
const unsigned char OneArray[]
Definition: arith_uint256_tests.cpp:46

R1ArrayHex
const char R1ArrayHex[]
Definition: arith_uint256_tests.cpp:29

almostEqual
static bool almostEqual(double d1, double d2)
Definition: arith_uint256_tests.cpp:366

R2Array
const unsigned char R2Array[]
Definition: arith_uint256_tests.cpp:34

R2L
const arith_uint256 R2L
Definition: arith_uint256_tests.cpp:37

R1Ldouble
const double R1Ldouble
Definition: arith_uint256_tests.cpp:30

ArrayToString
static std::string ArrayToString(const unsigned char A[], unsigned int width)
Definition: arith_uint256_tests.cpp:57

arith_uint256V
static arith_uint256 arith_uint256V(const std::vector< unsigned char > &vch)
Convert vector to arith_uint256, via uint256 blob.
Definition: arith_uint256_tests.cpp:21

MaxArray
const unsigned char MaxArray[]
Definition: arith_uint256_tests.cpp:51

ZeroL
const arith_uint256 ZeroL
Definition: arith_uint256_tests.cpp:44

arith_uint256
256-bit unsigned big integer.
Definition: arith_uint256.h:250

arith_uint256::SetCompact
arith_uint256 & SetCompact(uint32_t nCompact, bool *pfNegative=nullptr, bool *pfOverflow=nullptr)
The "compact" format is a representation of a whole number N using an unsigned 32bit number similar t...
Definition: arith_uint256.cpp:203

arith_uint256::GetCompact
uint32_t GetCompact(bool fNegative=false) const
Definition: arith_uint256.cpp:223

base_uint::size
unsigned int size() const
Definition: arith_uint256.h:231

base_uint::getdouble
double getdouble() const
Definition: arith_uint256.cpp:135

base_uint::ToString
std::string ToString() const
Definition: arith_uint256.cpp:165

base_uint::GetLow64
uint64_t GetLow64() const
Definition: arith_uint256.h:242

base_uint::SetHex
void SetHex(const char *psz)
Definition: arith_uint256.cpp:153

base_uint::GetHex
std::string GetHex() const
Definition: arith_uint256.cpp:147

uint256
256-bit opaque blob.
Definition: uint256.h:124

uint_error
Definition: arith_uint256.h:17

BOOST_AUTO_TEST_SUITE
BOOST_AUTO_TEST_SUITE(cuckoocache_tests)
Test Suite for CuckooCache.

BOOST_AUTO_TEST_SUITE_END
BOOST_AUTO_TEST_SUITE_END()

T
#define T(expected, seed, data)

BOOST_CHECK_THROW
#define BOOST_CHECK_THROW(stmt, excMatch)
Definition: object.cpp:19

BOOST_CHECK_EQUAL
#define BOOST_CHECK_EQUAL(v1, v2)
Definition: object.cpp:18

BOOST_CHECK
#define BOOST_CHECK(expr)
Definition: object.cpp:17

ToString
std::string ToString(const T &t)
Locale-independent version of std::to_string.
Definition: string.h:87

uint256.h