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Diffstat (limited to '3rdparty/rapidjson/test/unittest/strtodtest.cpp')
-rw-r--r-- | 3rdparty/rapidjson/test/unittest/strtodtest.cpp | 132 |
1 files changed, 0 insertions, 132 deletions
diff --git a/3rdparty/rapidjson/test/unittest/strtodtest.cpp b/3rdparty/rapidjson/test/unittest/strtodtest.cpp deleted file mode 100644 index a42d96e4a67..00000000000 --- a/3rdparty/rapidjson/test/unittest/strtodtest.cpp +++ /dev/null @@ -1,132 +0,0 @@ -// Tencent is pleased to support the open source community by making RapidJSON available. -// -// Copyright (C) 2015 THL A29 Limited, a Tencent company, and Milo Yip. All rights reserved. -// -// Licensed under the MIT License (the "License"); you may not use this file except -// in compliance with the License. You may obtain a copy of the License at -// -// http://opensource.org/licenses/MIT -// -// Unless required by applicable law or agreed to in writing, software distributed -// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR -// CONDITIONS OF ANY KIND, either express or implied. See the License for the -// specific language governing permissions and limitations under the License. - -#include "unittest.h" - -#include "rapidjson/internal/strtod.h" - -#ifdef __clang__ -RAPIDJSON_DIAG_PUSH -RAPIDJSON_DIAG_OFF(unreachable-code) -#endif - -#define BIGINTEGER_LITERAL(s) BigInteger(s, sizeof(s) - 1) - -using namespace rapidjson::internal; - -TEST(Strtod, CheckApproximationCase) { - static const int kSignificandSize = 52; - static const int kExponentBias = 0x3FF; - static const uint64_t kExponentMask = RAPIDJSON_UINT64_C2(0x7FF00000, 0x00000000); - static const uint64_t kSignificandMask = RAPIDJSON_UINT64_C2(0x000FFFFF, 0xFFFFFFFF); - static const uint64_t kHiddenBit = RAPIDJSON_UINT64_C2(0x00100000, 0x00000000); - - // http://www.exploringbinary.com/using-integers-to-check-a-floating-point-approximation/ - // Let b = 0x1.465a72e467d88p-149 - // = 5741268244528520 x 2^-201 - union { - double d; - uint64_t u; - }u; - u.u = 0x465a72e467d88 | ((static_cast<uint64_t>(-149 + kExponentBias)) << kSignificandSize); - const double b = u.d; - const uint64_t bInt = (u.u & kSignificandMask) | kHiddenBit; - const int bExp = ((u.u & kExponentMask) >> kSignificandSize) - kExponentBias - kSignificandSize; - EXPECT_DOUBLE_EQ(1.7864e-45, b); - EXPECT_EQ(RAPIDJSON_UINT64_C2(0x001465a7, 0x2e467d88), bInt); - EXPECT_EQ(-201, bExp); - - // Let d = 17864 x 10-49 - const char dInt[] = "17864"; - const int dExp = -49; - - // Let h = 2^(bExp-1) - const int hExp = bExp - 1; - EXPECT_EQ(-202, hExp); - - int dS_Exp2 = 0; - int dS_Exp5 = 0; - int bS_Exp2 = 0; - int bS_Exp5 = 0; - int hS_Exp2 = 0; - int hS_Exp5 = 0; - - // Adjust for decimal exponent - if (dExp >= 0) { - dS_Exp2 += dExp; - dS_Exp5 += dExp; - } - else { - bS_Exp2 -= dExp; - bS_Exp5 -= dExp; - hS_Exp2 -= dExp; - hS_Exp5 -= dExp; - } - - // Adjust for binary exponent - if (bExp >= 0) - bS_Exp2 += bExp; - else { - dS_Exp2 -= bExp; - hS_Exp2 -= bExp; - } - - // Adjust for half ulp exponent - if (hExp >= 0) - hS_Exp2 += hExp; - else { - dS_Exp2 -= hExp; - bS_Exp2 -= hExp; - } - - // Remove common power of two factor from all three scaled values - int common_Exp2 = std::min(dS_Exp2, std::min(bS_Exp2, hS_Exp2)); - dS_Exp2 -= common_Exp2; - bS_Exp2 -= common_Exp2; - hS_Exp2 -= common_Exp2; - - EXPECT_EQ(153, dS_Exp2); - EXPECT_EQ(0, dS_Exp5); - EXPECT_EQ(1, bS_Exp2); - EXPECT_EQ(49, bS_Exp5); - EXPECT_EQ(0, hS_Exp2); - EXPECT_EQ(49, hS_Exp5); - - BigInteger dS = BIGINTEGER_LITERAL(dInt); - dS.MultiplyPow5(static_cast<unsigned>(dS_Exp5)) <<= static_cast<size_t>(dS_Exp2); - - BigInteger bS(bInt); - bS.MultiplyPow5(static_cast<unsigned>(bS_Exp5)) <<= static_cast<size_t>(bS_Exp2); - - BigInteger hS(1); - hS.MultiplyPow5(static_cast<unsigned>(hS_Exp5)) <<= static_cast<size_t>(hS_Exp2); - - EXPECT_TRUE(BIGINTEGER_LITERAL("203970822259994138521801764465966248930731085529088") == dS); - EXPECT_TRUE(BIGINTEGER_LITERAL("203970822259994122305215569213032722473144531250000") == bS); - EXPECT_TRUE(BIGINTEGER_LITERAL("17763568394002504646778106689453125") == hS); - - EXPECT_EQ(1, dS.Compare(bS)); - - BigInteger delta(0); - EXPECT_FALSE(dS.Difference(bS, &delta)); - EXPECT_TRUE(BIGINTEGER_LITERAL("16216586195252933526457586554279088") == delta); - EXPECT_TRUE(bS.Difference(dS, &delta)); - EXPECT_TRUE(BIGINTEGER_LITERAL("16216586195252933526457586554279088") == delta); - - EXPECT_EQ(-1, delta.Compare(hS)); -} - -#ifdef __clang__ -RAPIDJSON_DIAG_POP -#endif |