1 // Copyright (c) 2011-2020 The Bitcoin Core developers 2 // Distributed under the MIT software license, see the accompanying 3 // file COPYING or http://www.opensource.org/licenses/mit-license.php. 4 5 #include <arith_uint256.h> 6 #include <uint256.h> 7 8 #include <boost/test/unit_test.hpp> 9 10 #include <cmath> 11 #include <cstdint> 12 #include <iomanip> 13 #include <limits> 14 #include <sstream> 15 #include <string> 16 #include <vector> 17 18 BOOST_AUTO_TEST_SUITE(arith_uint256_tests) 19 20 /// Convert vector to arith_uint256, via uint256 blob 21 static inline arith_uint256 arith_uint256V(const std::vector<unsigned char>& vch) 22 { 23 return UintToArith256(uint256(vch)); 24 } 25 26 const unsigned char R1Array[] = 27 "\x9c\x52\x4a\xdb\xcf\x56\x11\x12\x2b\x29\x12\x5e\x5d\x35\xd2\xd2" 28 "\x22\x81\xaa\xb5\x33\xf0\x08\x32\xd5\x56\xb1\xf9\xea\xe5\x1d\x7d"; 29 const char R1ArrayHex[] = "7D1DE5EAF9B156D53208F033B5AA8122D2d2355d5e12292b121156cfdb4a529c"; 30 const double R1Ldouble = 0.4887374590559308955; // R1L equals roughly R1Ldouble * 2^256 31 const arith_uint256 R1L = arith_uint256V(std::vector<unsigned char>(R1Array,R1Array+32)); 32 const uint64_t R1LLow64 = 0x121156cfdb4a529cULL; 33 34 const unsigned char R2Array[] = 35 "\x70\x32\x1d\x7c\x47\xa5\x6b\x40\x26\x7e\x0a\xc3\xa6\x9c\xb6\xbf" 36 "\x13\x30\x47\xa3\x19\x2d\xda\x71\x49\x13\x72\xf0\xb4\xca\x81\xd7"; 37 const arith_uint256 R2L = arith_uint256V(std::vector<unsigned char>(R2Array,R2Array+32)); 38 39 const char R1LplusR2L[] = "549FB09FEA236A1EA3E31D4D58F1B1369288D204211CA751527CFC175767850C"; 40 41 const unsigned char ZeroArray[] = 42 "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" 43 "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"; 44 const arith_uint256 ZeroL = arith_uint256V(std::vector<unsigned char>(ZeroArray,ZeroArray+32)); 45 46 const unsigned char OneArray[] = 47 "\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" 48 "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"; 49 const arith_uint256 OneL = arith_uint256V(std::vector<unsigned char>(OneArray,OneArray+32)); 50 51 const unsigned char MaxArray[] = 52 "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff" 53 "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"; 54 const arith_uint256 MaxL = arith_uint256V(std::vector<unsigned char>(MaxArray,MaxArray+32)); 55 56 const arith_uint256 HalfL = (OneL << 255); 57 static std::string ArrayToString(const unsigned char A[], unsigned int width) 58 { 59 std::stringstream Stream; 60 Stream << std::hex; 61 for (unsigned int i = 0; i < width; ++i) 62 { 63 Stream<<std::setw(2)<<std::setfill('0')<<(unsigned int)A[width-i-1]; 64 } 65 return Stream.str(); 66 } 67 68 BOOST_AUTO_TEST_CASE( basics ) // constructors, equality, inequality 69 { 70 BOOST_CHECK(1 == 0+1); 71 // constructor arith_uint256(vector<char>): 72 BOOST_CHECK(R1L.ToString() == ArrayToString(R1Array,32)); 73 BOOST_CHECK(R2L.ToString() == ArrayToString(R2Array,32)); 74 BOOST_CHECK(ZeroL.ToString() == ArrayToString(ZeroArray,32)); 75 BOOST_CHECK(OneL.ToString() == ArrayToString(OneArray,32)); 76 BOOST_CHECK(MaxL.ToString() == ArrayToString(MaxArray,32)); 77 BOOST_CHECK(OneL.ToString() != ArrayToString(ZeroArray,32)); 78 79 // == and != 80 BOOST_CHECK(R1L != R2L); 81 BOOST_CHECK(ZeroL != OneL); 82 BOOST_CHECK(OneL != ZeroL); 83 BOOST_CHECK(MaxL != ZeroL); 84 BOOST_CHECK(~MaxL == ZeroL); 85 BOOST_CHECK( ((R1L ^ R2L) ^ R1L) == R2L); 86 87 uint64_t Tmp64 = 0xc4dab720d9c7acaaULL; 88 for (unsigned int i = 0; i < 256; ++i) 89 { 90 BOOST_CHECK(ZeroL != (OneL << i)); 91 BOOST_CHECK((OneL << i) != ZeroL); 92 BOOST_CHECK(R1L != (R1L ^ (OneL << i))); 93 BOOST_CHECK(((arith_uint256(Tmp64) ^ (OneL << i) ) != Tmp64 )); 94 } 95 BOOST_CHECK(ZeroL == (OneL << 256)); 96 97 // String Constructor and Copy Constructor 98 BOOST_CHECK(arith_uint256("0x"+R1L.ToString()) == R1L); 99 BOOST_CHECK(arith_uint256("0x"+R2L.ToString()) == R2L); 100 BOOST_CHECK(arith_uint256("0x"+ZeroL.ToString()) == ZeroL); 101 BOOST_CHECK(arith_uint256("0x"+OneL.ToString()) == OneL); 102 BOOST_CHECK(arith_uint256("0x"+MaxL.ToString()) == MaxL); 103 BOOST_CHECK(arith_uint256(R1L.ToString()) == R1L); 104 BOOST_CHECK(arith_uint256(" 0x"+R1L.ToString()+" ") == R1L); 105 BOOST_CHECK(arith_uint256("") == ZeroL); 106 BOOST_CHECK(R1L == arith_uint256(R1ArrayHex)); 107 BOOST_CHECK(arith_uint256(R1L) == R1L); 108 BOOST_CHECK((arith_uint256(R1L^R2L)^R2L) == R1L); 109 BOOST_CHECK(arith_uint256(ZeroL) == ZeroL); 110 BOOST_CHECK(arith_uint256(OneL) == OneL); 111 112 // uint64_t constructor 113 BOOST_CHECK( (R1L & arith_uint256("0xffffffffffffffff")) == arith_uint256(R1LLow64)); 114 BOOST_CHECK(ZeroL == arith_uint256(0)); 115 BOOST_CHECK(OneL == arith_uint256(1)); 116 BOOST_CHECK(arith_uint256("0xffffffffffffffff") == arith_uint256(0xffffffffffffffffULL)); 117 118 // Assignment (from base_uint) 119 arith_uint256 tmpL = ~ZeroL; BOOST_CHECK(tmpL == ~ZeroL); 120 tmpL = ~OneL; BOOST_CHECK(tmpL == ~OneL); 121 tmpL = ~R1L; BOOST_CHECK(tmpL == ~R1L); 122 tmpL = ~R2L; BOOST_CHECK(tmpL == ~R2L); 123 tmpL = ~MaxL; BOOST_CHECK(tmpL == ~MaxL); 124 } 125 126 static void shiftArrayRight(unsigned char* to, const unsigned char* from, unsigned int arrayLength, unsigned int bitsToShift) 127 { 128 for (unsigned int T=0; T < arrayLength; ++T) 129 { 130 unsigned int F = (T+bitsToShift/8); 131 if (F < arrayLength) 132 to[T] = from[F] >> (bitsToShift%8); 133 else 134 to[T] = 0; 135 if (F + 1 < arrayLength) 136 to[T] |= from[(F+1)] << (8-bitsToShift%8); 137 } 138 } 139 140 static void shiftArrayLeft(unsigned char* to, const unsigned char* from, unsigned int arrayLength, unsigned int bitsToShift) 141 { 142 for (unsigned int T=0; T < arrayLength; ++T) 143 { 144 if (T >= bitsToShift/8) 145 { 146 unsigned int F = T-bitsToShift/8; 147 to[T] = from[F] << (bitsToShift%8); 148 if (T >= bitsToShift/8+1) 149 to[T] |= from[F-1] >> (8-bitsToShift%8); 150 } 151 else { 152 to[T] = 0; 153 } 154 } 155 } 156 157 BOOST_AUTO_TEST_CASE( shifts ) { // "<<" ">>" "<<=" ">>=" 158 unsigned char TmpArray[32]; 159 arith_uint256 TmpL; 160 for (unsigned int i = 0; i < 256; ++i) 161 { 162 shiftArrayLeft(TmpArray, OneArray, 32, i); 163 BOOST_CHECK(arith_uint256V(std::vector<unsigned char>(TmpArray,TmpArray+32)) == (OneL << i)); 164 TmpL = OneL; TmpL <<= i; 165 BOOST_CHECK(TmpL == (OneL << i)); 166 BOOST_CHECK((HalfL >> (255-i)) == (OneL << i)); 167 TmpL = HalfL; TmpL >>= (255-i); 168 BOOST_CHECK(TmpL == (OneL << i)); 169 170 shiftArrayLeft(TmpArray, R1Array, 32, i); 171 BOOST_CHECK(arith_uint256V(std::vector<unsigned char>(TmpArray,TmpArray+32)) == (R1L << i)); 172 TmpL = R1L; TmpL <<= i; 173 BOOST_CHECK(TmpL == (R1L << i)); 174 175 shiftArrayRight(TmpArray, R1Array, 32, i); 176 BOOST_CHECK(arith_uint256V(std::vector<unsigned char>(TmpArray,TmpArray+32)) == (R1L >> i)); 177 TmpL = R1L; TmpL >>= i; 178 BOOST_CHECK(TmpL == (R1L >> i)); 179 180 shiftArrayLeft(TmpArray, MaxArray, 32, i); 181 BOOST_CHECK(arith_uint256V(std::vector<unsigned char>(TmpArray,TmpArray+32)) == (MaxL << i)); 182 TmpL = MaxL; TmpL <<= i; 183 BOOST_CHECK(TmpL == (MaxL << i)); 184 185 shiftArrayRight(TmpArray, MaxArray, 32, i); 186 BOOST_CHECK(arith_uint256V(std::vector<unsigned char>(TmpArray,TmpArray+32)) == (MaxL >> i)); 187 TmpL = MaxL; TmpL >>= i; 188 BOOST_CHECK(TmpL == (MaxL >> i)); 189 } 190 arith_uint256 c1L = arith_uint256(0x0123456789abcdefULL); 191 arith_uint256 c2L = c1L << 128; 192 for (unsigned int i = 0; i < 128; ++i) { 193 BOOST_CHECK((c1L << i) == (c2L >> (128-i))); 194 } 195 for (unsigned int i = 128; i < 256; ++i) { 196 BOOST_CHECK((c1L << i) == (c2L << (i-128))); 197 } 198 } 199 200 BOOST_AUTO_TEST_CASE( unaryOperators ) // ! ~ - 201 { 202 BOOST_CHECK(~ZeroL == MaxL); 203 204 unsigned char TmpArray[32]; 205 for (unsigned int i = 0; i < 32; ++i) { TmpArray[i] = ~R1Array[i]; } 206 BOOST_CHECK(arith_uint256V(std::vector<unsigned char>(TmpArray,TmpArray+32)) == (~R1L)); 207 208 BOOST_CHECK(-ZeroL == ZeroL); 209 BOOST_CHECK(-R1L == (~R1L)+1); 210 for (unsigned int i = 0; i < 256; ++i) 211 BOOST_CHECK(-(OneL<<i) == (MaxL << i)); 212 } 213 214 215 // Check if doing _A_ _OP_ _B_ results in the same as applying _OP_ onto each 216 // element of Aarray and Barray, and then converting the result into an arith_uint256. 217 #define CHECKBITWISEOPERATOR(_A_,_B_,_OP_) \ 218 for (unsigned int i = 0; i < 32; ++i) { TmpArray[i] = _A_##Array[i] _OP_ _B_##Array[i]; } \ 219 BOOST_CHECK(arith_uint256V(std::vector<unsigned char>(TmpArray,TmpArray+32)) == (_A_##L _OP_ _B_##L)); 220 221 #define CHECKASSIGNMENTOPERATOR(_A_,_B_,_OP_) \ 222 TmpL = _A_##L; TmpL _OP_##= _B_##L; BOOST_CHECK(TmpL == (_A_##L _OP_ _B_##L)); 223 224 BOOST_AUTO_TEST_CASE( bitwiseOperators ) 225 { 226 unsigned char TmpArray[32]; 227 228 CHECKBITWISEOPERATOR(R1,R2,|) 229 CHECKBITWISEOPERATOR(R1,R2,^) 230 CHECKBITWISEOPERATOR(R1,R2,&) 231 CHECKBITWISEOPERATOR(R1,Zero,|) 232 CHECKBITWISEOPERATOR(R1,Zero,^) 233 CHECKBITWISEOPERATOR(R1,Zero,&) 234 CHECKBITWISEOPERATOR(R1,Max,|) 235 CHECKBITWISEOPERATOR(R1,Max,^) 236 CHECKBITWISEOPERATOR(R1,Max,&) 237 CHECKBITWISEOPERATOR(Zero,R1,|) 238 CHECKBITWISEOPERATOR(Zero,R1,^) 239 CHECKBITWISEOPERATOR(Zero,R1,&) 240 CHECKBITWISEOPERATOR(Max,R1,|) 241 CHECKBITWISEOPERATOR(Max,R1,^) 242 CHECKBITWISEOPERATOR(Max,R1,&) 243 244 arith_uint256 TmpL; 245 CHECKASSIGNMENTOPERATOR(R1,R2,|) 246 CHECKASSIGNMENTOPERATOR(R1,R2,^) 247 CHECKASSIGNMENTOPERATOR(R1,R2,&) 248 CHECKASSIGNMENTOPERATOR(R1,Zero,|) 249 CHECKASSIGNMENTOPERATOR(R1,Zero,^) 250 CHECKASSIGNMENTOPERATOR(R1,Zero,&) 251 CHECKASSIGNMENTOPERATOR(R1,Max,|) 252 CHECKASSIGNMENTOPERATOR(R1,Max,^) 253 CHECKASSIGNMENTOPERATOR(R1,Max,&) 254 CHECKASSIGNMENTOPERATOR(Zero,R1,|) 255 CHECKASSIGNMENTOPERATOR(Zero,R1,^) 256 CHECKASSIGNMENTOPERATOR(Zero,R1,&) 257 CHECKASSIGNMENTOPERATOR(Max,R1,|) 258 CHECKASSIGNMENTOPERATOR(Max,R1,^) 259 CHECKASSIGNMENTOPERATOR(Max,R1,&) 260 261 uint64_t Tmp64 = 0xe1db685c9a0b47a2ULL; 262 TmpL = R1L; TmpL |= Tmp64; BOOST_CHECK(TmpL == (R1L | arith_uint256(Tmp64))); 263 TmpL = R1L; TmpL |= 0; BOOST_CHECK(TmpL == R1L); 264 TmpL ^= 0; BOOST_CHECK(TmpL == R1L); 265 TmpL ^= Tmp64; BOOST_CHECK(TmpL == (R1L ^ arith_uint256(Tmp64))); 266 } 267 268 BOOST_AUTO_TEST_CASE( comparison ) // <= >= < > 269 { 270 arith_uint256 TmpL; 271 for (unsigned int i = 0; i < 256; ++i) { 272 TmpL= OneL<< i; 273 BOOST_CHECK( TmpL >= ZeroL && TmpL > ZeroL && ZeroL < TmpL && ZeroL <= TmpL); 274 BOOST_CHECK( TmpL >= 0 && TmpL > 0 && 0 < TmpL && 0 <= TmpL); 275 TmpL |= R1L; 276 BOOST_CHECK( TmpL >= R1L ); BOOST_CHECK( (TmpL == R1L) != (TmpL > R1L)); BOOST_CHECK( (TmpL == R1L) || !( TmpL <= R1L)); 277 BOOST_CHECK( R1L <= TmpL ); BOOST_CHECK( (R1L == TmpL) != (R1L < TmpL)); BOOST_CHECK( (TmpL == R1L) || !( R1L >= TmpL)); 278 BOOST_CHECK(! (TmpL < R1L)); BOOST_CHECK(! (R1L > TmpL)); 279 } 280 } 281 282 BOOST_AUTO_TEST_CASE( plusMinus ) 283 { 284 arith_uint256 TmpL = 0; 285 BOOST_CHECK(R1L+R2L == arith_uint256(R1LplusR2L)); 286 TmpL += R1L; 287 BOOST_CHECK(TmpL == R1L); 288 TmpL += R2L; 289 BOOST_CHECK(TmpL == R1L + R2L); 290 BOOST_CHECK(OneL+MaxL == ZeroL); 291 BOOST_CHECK(MaxL+OneL == ZeroL); 292 for (unsigned int i = 1; i < 256; ++i) { 293 BOOST_CHECK( (MaxL >> i) + OneL == (HalfL >> (i-1)) ); 294 BOOST_CHECK( OneL + (MaxL >> i) == (HalfL >> (i-1)) ); 295 TmpL = (MaxL>>i); TmpL += OneL; 296 BOOST_CHECK( TmpL == (HalfL >> (i-1)) ); 297 TmpL = (MaxL>>i); TmpL += 1; 298 BOOST_CHECK( TmpL == (HalfL >> (i-1)) ); 299 TmpL = (MaxL>>i); 300 BOOST_CHECK( TmpL++ == (MaxL>>i) ); 301 BOOST_CHECK( TmpL == (HalfL >> (i-1))); 302 } 303 BOOST_CHECK(arith_uint256(0xbedc77e27940a7ULL) + 0xee8d836fce66fbULL == arith_uint256(0xbedc77e27940a7ULL + 0xee8d836fce66fbULL)); 304 TmpL = arith_uint256(0xbedc77e27940a7ULL); TmpL += 0xee8d836fce66fbULL; 305 BOOST_CHECK(TmpL == arith_uint256(0xbedc77e27940a7ULL+0xee8d836fce66fbULL)); 306 TmpL -= 0xee8d836fce66fbULL; BOOST_CHECK(TmpL == 0xbedc77e27940a7ULL); 307 TmpL = R1L; 308 BOOST_CHECK(++TmpL == R1L+1); 309 310 BOOST_CHECK(R1L -(-R2L) == R1L+R2L); 311 BOOST_CHECK(R1L -(-OneL) == R1L+OneL); 312 BOOST_CHECK(R1L - OneL == R1L+(-OneL)); 313 for (unsigned int i = 1; i < 256; ++i) { 314 BOOST_CHECK((MaxL>>i) - (-OneL) == (HalfL >> (i-1))); 315 BOOST_CHECK((HalfL >> (i-1)) - OneL == (MaxL>>i)); 316 TmpL = (HalfL >> (i-1)); 317 BOOST_CHECK(TmpL-- == (HalfL >> (i-1))); 318 BOOST_CHECK(TmpL == (MaxL >> i)); 319 TmpL = (HalfL >> (i-1)); 320 BOOST_CHECK(--TmpL == (MaxL >> i)); 321 } 322 TmpL = R1L; 323 BOOST_CHECK(--TmpL == R1L-1); 324 } 325 326 BOOST_AUTO_TEST_CASE( multiply ) 327 { 328 BOOST_CHECK((R1L * R1L).ToString() == "62a38c0486f01e45879d7910a7761bf30d5237e9873f9bff3642a732c4d84f10"); 329 BOOST_CHECK((R1L * R2L).ToString() == "de37805e9986996cfba76ff6ba51c008df851987d9dd323f0e5de07760529c40"); 330 BOOST_CHECK((R1L * ZeroL) == ZeroL); 331 BOOST_CHECK((R1L * OneL) == R1L); 332 BOOST_CHECK((R1L * MaxL) == -R1L); 333 BOOST_CHECK((R2L * R1L) == (R1L * R2L)); 334 BOOST_CHECK((R2L * R2L).ToString() == "ac8c010096767d3cae5005dec28bb2b45a1d85ab7996ccd3e102a650f74ff100"); 335 BOOST_CHECK((R2L * ZeroL) == ZeroL); 336 BOOST_CHECK((R2L * OneL) == R2L); 337 BOOST_CHECK((R2L * MaxL) == -R2L); 338 339 BOOST_CHECK(MaxL * MaxL == OneL); 340 341 BOOST_CHECK((R1L * 0) == 0); 342 BOOST_CHECK((R1L * 1) == R1L); 343 BOOST_CHECK((R1L * 3).ToString() == "7759b1c0ed14047f961ad09b20ff83687876a0181a367b813634046f91def7d4"); 344 BOOST_CHECK((R2L * 0x87654321UL).ToString() == "23f7816e30c4ae2017257b7a0fa64d60402f5234d46e746b61c960d09a26d070"); 345 } 346 347 BOOST_AUTO_TEST_CASE( divide ) 348 { 349 arith_uint256 D1L("AD7133AC1977FA2B7"); 350 arith_uint256 D2L("ECD751716"); 351 BOOST_CHECK((R1L / D1L).ToString() == "00000000000000000b8ac01106981635d9ed112290f8895545a7654dde28fb3a"); 352 BOOST_CHECK((R1L / D2L).ToString() == "000000000873ce8efec5b67150bad3aa8c5fcb70e947586153bf2cec7c37c57a"); 353 BOOST_CHECK(R1L / OneL == R1L); 354 BOOST_CHECK(R1L / MaxL == ZeroL); 355 BOOST_CHECK(MaxL / R1L == 2); 356 BOOST_CHECK_THROW(R1L / ZeroL, uint_error); 357 BOOST_CHECK((R2L / D1L).ToString() == "000000000000000013e1665895a1cc981de6d93670105a6b3ec3b73141b3a3c5"); 358 BOOST_CHECK((R2L / D2L).ToString() == "000000000e8f0abe753bb0afe2e9437ee85d280be60882cf0bd1aaf7fa3cc2c4"); 359 BOOST_CHECK(R2L / OneL == R2L); 360 BOOST_CHECK(R2L / MaxL == ZeroL); 361 BOOST_CHECK(MaxL / R2L == 1); 362 BOOST_CHECK_THROW(R2L / ZeroL, uint_error); 363 } 364 365 366 static bool almostEqual(double d1, double d2) 367 { 368 return fabs(d1-d2) <= 4*fabs(d1)*std::numeric_limits<double>::epsilon(); 369 } 370 371 BOOST_AUTO_TEST_CASE( methods ) // GetHex SetHex size() GetLow64 GetSerializeSize, Serialize, Unserialize 372 { 373 BOOST_CHECK(R1L.GetHex() == R1L.ToString()); 374 BOOST_CHECK(R2L.GetHex() == R2L.ToString()); 375 BOOST_CHECK(OneL.GetHex() == OneL.ToString()); 376 BOOST_CHECK(MaxL.GetHex() == MaxL.ToString()); 377 arith_uint256 TmpL(R1L); 378 BOOST_CHECK(TmpL == R1L); 379 TmpL.SetHex(R2L.ToString()); BOOST_CHECK(TmpL == R2L); 380 TmpL.SetHex(ZeroL.ToString()); BOOST_CHECK(TmpL == 0); 381 TmpL.SetHex(HalfL.ToString()); BOOST_CHECK(TmpL == HalfL); 382 383 TmpL.SetHex(R1L.ToString()); 384 BOOST_CHECK(R1L.size() == 32); 385 BOOST_CHECK(R2L.size() == 32); 386 BOOST_CHECK(ZeroL.size() == 32); 387 BOOST_CHECK(MaxL.size() == 32); 388 BOOST_CHECK(R1L.GetLow64() == R1LLow64); 389 BOOST_CHECK(HalfL.GetLow64() ==0x0000000000000000ULL); 390 BOOST_CHECK(OneL.GetLow64() ==0x0000000000000001ULL); 391 392 for (unsigned int i = 0; i < 255; ++i) 393 { 394 BOOST_CHECK((OneL << i).getdouble() == ldexp(1.0,i)); 395 } 396 BOOST_CHECK(ZeroL.getdouble() == 0.0); 397 for (int i = 256; i > 53; --i) 398 BOOST_CHECK(almostEqual((R1L>>(256-i)).getdouble(), ldexp(R1Ldouble,i))); 399 uint64_t R1L64part = (R1L>>192).GetLow64(); 400 for (int i = 53; i > 0; --i) // doubles can store all integers in {0,...,2^54-1} exactly 401 { 402 BOOST_CHECK((R1L>>(256-i)).getdouble() == (double)(R1L64part >> (64-i))); 403 } 404 } 405 406 BOOST_AUTO_TEST_CASE(bignum_SetCompact) 407 { 408 arith_uint256 num; 409 bool fNegative; 410 bool fOverflow; 411 num.SetCompact(0, &fNegative, &fOverflow); 412 BOOST_CHECK_EQUAL(num.GetHex(), "0000000000000000000000000000000000000000000000000000000000000000"); 413 BOOST_CHECK_EQUAL(num.GetCompact(), 0U); 414 BOOST_CHECK_EQUAL(fNegative, false); 415 BOOST_CHECK_EQUAL(fOverflow, false); 416 417 num.SetCompact(0x00123456, &fNegative, &fOverflow); 418 BOOST_CHECK_EQUAL(num.GetHex(), "0000000000000000000000000000000000000000000000000000000000000000"); 419 BOOST_CHECK_EQUAL(num.GetCompact(), 0U); 420 BOOST_CHECK_EQUAL(fNegative, false); 421 BOOST_CHECK_EQUAL(fOverflow, false); 422 423 num.SetCompact(0x01003456, &fNegative, &fOverflow); 424 BOOST_CHECK_EQUAL(num.GetHex(), "0000000000000000000000000000000000000000000000000000000000000000"); 425 BOOST_CHECK_EQUAL(num.GetCompact(), 0U); 426 BOOST_CHECK_EQUAL(fNegative, false); 427 BOOST_CHECK_EQUAL(fOverflow, false); 428 429 num.SetCompact(0x02000056, &fNegative, &fOverflow); 430 BOOST_CHECK_EQUAL(num.GetHex(), "0000000000000000000000000000000000000000000000000000000000000000"); 431 BOOST_CHECK_EQUAL(num.GetCompact(), 0U); 432 BOOST_CHECK_EQUAL(fNegative, false); 433 BOOST_CHECK_EQUAL(fOverflow, false); 434 435 num.SetCompact(0x03000000, &fNegative, &fOverflow); 436 BOOST_CHECK_EQUAL(num.GetHex(), "0000000000000000000000000000000000000000000000000000000000000000"); 437 BOOST_CHECK_EQUAL(num.GetCompact(), 0U); 438 BOOST_CHECK_EQUAL(fNegative, false); 439 BOOST_CHECK_EQUAL(fOverflow, false); 440 441 num.SetCompact(0x04000000, &fNegative, &fOverflow); 442 BOOST_CHECK_EQUAL(num.GetHex(), "0000000000000000000000000000000000000000000000000000000000000000"); 443 BOOST_CHECK_EQUAL(num.GetCompact(), 0U); 444 BOOST_CHECK_EQUAL(fNegative, false); 445 BOOST_CHECK_EQUAL(fOverflow, false); 446 447 num.SetCompact(0x00923456, &fNegative, &fOverflow); 448 BOOST_CHECK_EQUAL(num.GetHex(), "0000000000000000000000000000000000000000000000000000000000000000"); 449 BOOST_CHECK_EQUAL(num.GetCompact(), 0U); 450 BOOST_CHECK_EQUAL(fNegative, false); 451 BOOST_CHECK_EQUAL(fOverflow, false); 452 453 num.SetCompact(0x01803456, &fNegative, &fOverflow); 454 BOOST_CHECK_EQUAL(num.GetHex(), "0000000000000000000000000000000000000000000000000000000000000000"); 455 BOOST_CHECK_EQUAL(num.GetCompact(), 0U); 456 BOOST_CHECK_EQUAL(fNegative, false); 457 BOOST_CHECK_EQUAL(fOverflow, false); 458 459 num.SetCompact(0x02800056, &fNegative, &fOverflow); 460 BOOST_CHECK_EQUAL(num.GetHex(), "0000000000000000000000000000000000000000000000000000000000000000"); 461 BOOST_CHECK_EQUAL(num.GetCompact(), 0U); 462 BOOST_CHECK_EQUAL(fNegative, false); 463 BOOST_CHECK_EQUAL(fOverflow, false); 464 465 num.SetCompact(0x03800000, &fNegative, &fOverflow); 466 BOOST_CHECK_EQUAL(num.GetHex(), "0000000000000000000000000000000000000000000000000000000000000000"); 467 BOOST_CHECK_EQUAL(num.GetCompact(), 0U); 468 BOOST_CHECK_EQUAL(fNegative, false); 469 BOOST_CHECK_EQUAL(fOverflow, false); 470 471 num.SetCompact(0x04800000, &fNegative, &fOverflow); 472 BOOST_CHECK_EQUAL(num.GetHex(), "0000000000000000000000000000000000000000000000000000000000000000"); 473 BOOST_CHECK_EQUAL(num.GetCompact(), 0U); 474 BOOST_CHECK_EQUAL(fNegative, false); 475 BOOST_CHECK_EQUAL(fOverflow, false); 476 477 num.SetCompact(0x01123456, &fNegative, &fOverflow); 478 BOOST_CHECK_EQUAL(num.GetHex(), "0000000000000000000000000000000000000000000000000000000000000012"); 479 BOOST_CHECK_EQUAL(num.GetCompact(), 0x01120000U); 480 BOOST_CHECK_EQUAL(fNegative, false); 481 BOOST_CHECK_EQUAL(fOverflow, false); 482 483 // Make sure that we don't generate compacts with the 0x00800000 bit set 484 num = 0x80; 485 BOOST_CHECK_EQUAL(num.GetCompact(), 0x02008000U); 486 487 num.SetCompact(0x01fedcba, &fNegative, &fOverflow); 488 BOOST_CHECK_EQUAL(num.GetHex(), "000000000000000000000000000000000000000000000000000000000000007e"); 489 BOOST_CHECK_EQUAL(num.GetCompact(true), 0x01fe0000U); 490 BOOST_CHECK_EQUAL(fNegative, true); 491 BOOST_CHECK_EQUAL(fOverflow, false); 492 493 num.SetCompact(0x02123456, &fNegative, &fOverflow); 494 BOOST_CHECK_EQUAL(num.GetHex(), "0000000000000000000000000000000000000000000000000000000000001234"); 495 BOOST_CHECK_EQUAL(num.GetCompact(), 0x02123400U); 496 BOOST_CHECK_EQUAL(fNegative, false); 497 BOOST_CHECK_EQUAL(fOverflow, false); 498 499 num.SetCompact(0x03123456, &fNegative, &fOverflow); 500 BOOST_CHECK_EQUAL(num.GetHex(), "0000000000000000000000000000000000000000000000000000000000123456"); 501 BOOST_CHECK_EQUAL(num.GetCompact(), 0x03123456U); 502 BOOST_CHECK_EQUAL(fNegative, false); 503 BOOST_CHECK_EQUAL(fOverflow, false); 504 505 num.SetCompact(0x04123456, &fNegative, &fOverflow); 506 BOOST_CHECK_EQUAL(num.GetHex(), "0000000000000000000000000000000000000000000000000000000012345600"); 507 BOOST_CHECK_EQUAL(num.GetCompact(), 0x04123456U); 508 BOOST_CHECK_EQUAL(fNegative, false); 509 BOOST_CHECK_EQUAL(fOverflow, false); 510 511 num.SetCompact(0x04923456, &fNegative, &fOverflow); 512 BOOST_CHECK_EQUAL(num.GetHex(), "0000000000000000000000000000000000000000000000000000000012345600"); 513 BOOST_CHECK_EQUAL(num.GetCompact(true), 0x04923456U); 514 BOOST_CHECK_EQUAL(fNegative, true); 515 BOOST_CHECK_EQUAL(fOverflow, false); 516 517 num.SetCompact(0x05009234, &fNegative, &fOverflow); 518 BOOST_CHECK_EQUAL(num.GetHex(), "0000000000000000000000000000000000000000000000000000000092340000"); 519 BOOST_CHECK_EQUAL(num.GetCompact(), 0x05009234U); 520 BOOST_CHECK_EQUAL(fNegative, false); 521 BOOST_CHECK_EQUAL(fOverflow, false); 522 523 num.SetCompact(0x20123456, &fNegative, &fOverflow); 524 BOOST_CHECK_EQUAL(num.GetHex(), "1234560000000000000000000000000000000000000000000000000000000000"); 525 BOOST_CHECK_EQUAL(num.GetCompact(), 0x20123456U); 526 BOOST_CHECK_EQUAL(fNegative, false); 527 BOOST_CHECK_EQUAL(fOverflow, false); 528 529 num.SetCompact(0xff123456, &fNegative, &fOverflow); 530 BOOST_CHECK_EQUAL(fNegative, false); 531 BOOST_CHECK_EQUAL(fOverflow, true); 532 } 533 534 535 BOOST_AUTO_TEST_CASE( getmaxcoverage ) // some more tests just to get 100% coverage 536 { 537 // ~R1L give a base_uint<256> 538 BOOST_CHECK((~~R1L >> 10) == (R1L >> 10)); 539 BOOST_CHECK((~~R1L << 10) == (R1L << 10)); 540 BOOST_CHECK(!(~~R1L < R1L)); 541 BOOST_CHECK(~~R1L <= R1L); 542 BOOST_CHECK(!(~~R1L > R1L)); 543 BOOST_CHECK(~~R1L >= R1L); 544 BOOST_CHECK(!(R1L < ~~R1L)); 545 BOOST_CHECK(R1L <= ~~R1L); 546 BOOST_CHECK(!(R1L > ~~R1L)); 547 BOOST_CHECK(R1L >= ~~R1L); 548 549 BOOST_CHECK(~~R1L + R2L == R1L + ~~R2L); 550 BOOST_CHECK(~~R1L - R2L == R1L - ~~R2L); 551 BOOST_CHECK(~R1L != R1L); BOOST_CHECK(R1L != ~R1L); 552 unsigned char TmpArray[32]; 553 CHECKBITWISEOPERATOR(~R1,R2,|) 554 CHECKBITWISEOPERATOR(~R1,R2,^) 555 CHECKBITWISEOPERATOR(~R1,R2,&) 556 CHECKBITWISEOPERATOR(R1,~R2,|) 557 CHECKBITWISEOPERATOR(R1,~R2,^) 558 CHECKBITWISEOPERATOR(R1,~R2,&) 559 } 560 561 BOOST_AUTO_TEST_SUITE_END() 562