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f5e91c6fbae7dc0377dd382814ace063f50e2741
bitcoin/src/test/arith_uint256_tests.cpp
rustaceanrob e8691056c0 test: Unroll && conditions in macros 
Using `&&` in `BOOST_CHECK` is problematic as failures will not indicate
which condition failed. By unrolling these checks, the user knows
exactly which expression is the failing case.

As an example, here is a line that would be particularly hard to debug
if it failed:

```
src/test/net_tests.cpp

BOOST_CHECK((*ret)[1] && (*ret)[1]->m_type == "headers" && std::ranges::equal((*ret)[1]->m_recv, MakeByteSpan(msg_data_2)));
```

If any one of these conditions fail, the whole expression fails, with no
values printed or indication as to which condition failed.

This is also required when using test macros that support value
decomposition, which requires `&&` and `||` are `delete`. Examples
include `BOOST_TEST`, doctest, Catch2, etc.

ref: https://catch2-temp.readthedocs.io/en/latest/assertions.html#other-limitations
ref: https://fekir.info/post/decomposing-an-expression/
2026-08-03 11:10:13 +01:00

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// Copyright (c) 2011-present 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 <test/util/common.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)
/// Convert vector to arith_uint256, via uint256 blob
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 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));
// Construct from hex string
BOOST_CHECK_EQUAL(UintToArith256(uint256::FromHex(R1L.ToString()).value()), R1L);
BOOST_CHECK_EQUAL(UintToArith256(uint256::FromHex(R2L.ToString()).value()), R2L);
BOOST_CHECK_EQUAL(UintToArith256(uint256::FromHex(ZeroL.ToString()).value()), ZeroL);
BOOST_CHECK_EQUAL(UintToArith256(uint256::FromHex(OneL.ToString()).value()), OneL);
BOOST_CHECK_EQUAL(UintToArith256(uint256::FromHex(MaxL.ToString()).value()), MaxL);
BOOST_CHECK_EQUAL(UintToArith256(uint256::FromHex(R1ArrayHex).value()), R1L);
// Copy constructor
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_EQUAL(R1L & arith_uint256{0xffffffffffffffff}, arith_uint256{R1LLow64});
BOOST_CHECK_EQUAL(ZeroL, arith_uint256{0});
BOOST_CHECK_EQUAL(OneL, arith_uint256{1});
BOOST_CHECK_EQUAL(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] = uint8_t(from[F] >> (bitsToShift % 8));
else
to[T] = 0;
if (F + 1 < arrayLength)
to[T] |= uint8_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] = uint8_t(from[F] << (bitsToShift % 8));
if (T >= bitsToShift/8+1)
to[T] |= uint8_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] = uint8_t(~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] = uint8_t(_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);
BOOST_CHECK(TmpL > ZeroL);
BOOST_CHECK(ZeroL < TmpL);
BOOST_CHECK(ZeroL <= TmpL);
BOOST_CHECK(TmpL >= 0);
BOOST_CHECK(TmpL > 0);
BOOST_CHECK(0 < TmpL);
BOOST_CHECK(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_CHECK_LT(ZeroL,
OneL);
}
BOOST_AUTO_TEST_CASE( plusMinus )
{
arith_uint256 TmpL = 0;
BOOST_CHECK_EQUAL(R1L + R2L, UintToArith256(uint256{"549fb09fea236a1ea3e31d4d58f1b1369288d204211ca751527cfc175767850c"}));
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{UintToArith256(uint256{"00000000000000000000000000000000000000000000000ad7133ac1977fa2b7"})};
arith_uint256 D2L{UintToArith256(uint256{"0000000000000000000000000000000000000000000000000000000ecd751716"})};
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)
{
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 = R2L;
BOOST_CHECK(TmpL == R2L);
TmpL = ZeroL;
BOOST_CHECK(TmpL == 0);
TmpL = HalfL;
BOOST_CHECK(TmpL == HalfL);
TmpL = R1L;
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_CASE(conversion)
{
for (const arith_uint256& arith : {ZeroL, OneL, R1L, R2L}) {
const auto u256{uint256::FromHex(arith.GetHex()).value()};
BOOST_CHECK_EQUAL(UintToArith256(ArithToUint256(arith)), arith);
BOOST_CHECK_EQUAL(UintToArith256(u256), arith);
BOOST_CHECK_EQUAL(u256, ArithToUint256(arith));
BOOST_CHECK_EQUAL(ArithToUint256(arith).GetHex(), UintToArith256(u256).GetHex());
}
for (uint8_t num : {0, 1, 0xff}) {
BOOST_CHECK_EQUAL(UintToArith256(uint256{num}), arith_uint256{num});
BOOST_CHECK_EQUAL(uint256{num}, ArithToUint256(arith_uint256{num}));
BOOST_CHECK_EQUAL(UintToArith256(uint256{num}), num);
}
}
BOOST_AUTO_TEST_CASE(operator_with_self)
{
arith_uint256 v{2};
v *= v;
BOOST_CHECK_EQUAL(v, arith_uint256{4});
v /= v;
BOOST_CHECK_EQUAL(v, arith_uint256{1});
v += v;
BOOST_CHECK_EQUAL(v, arith_uint256{2});
v -= v;
BOOST_CHECK_EQUAL(v, arith_uint256{0});
}
BOOST_AUTO_TEST_SUITE_END()
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