1 // Tencent is pleased to support the open source community by making RapidJSON available.
3 // Copyright (C) 2015 THL A29 Limited, a Tencent company, and Milo Yip. All rights reserved.
5 // Licensed under the MIT License (the "License"); you may not use this file except
6 // in compliance with the License. You may obtain a copy of the License at
8 // http://opensource.org/licenses/MIT
10 // Unless required by applicable law or agreed to in writing, software distributed
11 // under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
12 // CONDITIONS OF ANY KIND, either express or implied. See the License for the
13 // specific language governing permissions and limitations under the License.
17 #include "rapidjson/internal/biginteger.h"
19 using namespace rapidjson::internal;
21 #define BIGINTEGER_LITERAL(s) BigInteger(s, sizeof(s) - 1)
23 static const BigInteger kZero(0);
24 static const BigInteger kOne(1);
25 static const BigInteger kUint64Max = BIGINTEGER_LITERAL("18446744073709551615");
26 static const BigInteger kTwo64 = BIGINTEGER_LITERAL("18446744073709551616");
28 TEST(BigInteger, Constructor) {
29 EXPECT_TRUE(kZero.IsZero());
30 EXPECT_TRUE(kZero == kZero);
31 EXPECT_TRUE(kZero == BIGINTEGER_LITERAL("0"));
32 EXPECT_TRUE(kZero == BIGINTEGER_LITERAL("00"));
34 const BigInteger a(123);
36 EXPECT_TRUE(a == BIGINTEGER_LITERAL("123"));
37 EXPECT_TRUE(a == BIGINTEGER_LITERAL("0123"));
39 EXPECT_EQ(2u, kTwo64.GetCount());
40 EXPECT_EQ(0u, kTwo64.GetDigit(0));
41 EXPECT_EQ(1u, kTwo64.GetDigit(1));
44 TEST(BigInteger, AddUint64) {
47 EXPECT_TRUE(kZero == a);
50 EXPECT_TRUE(kOne == a);
53 EXPECT_TRUE(BigInteger(2) == a);
55 EXPECT_TRUE(BigInteger(RAPIDJSON_UINT64_C2(0xFFFFFFFF, 0xFFFFFFFF)) == kUint64Max);
56 BigInteger b = kUint64Max;
58 EXPECT_TRUE(kTwo64 == b);
59 b += RAPIDJSON_UINT64_C2(0xFFFFFFFF, 0xFFFFFFFF);
60 EXPECT_TRUE(BIGINTEGER_LITERAL("36893488147419103231") == b);
63 TEST(BigInteger, MultiplyUint64) {
65 a *= static_cast <uint64_t>(0);
66 EXPECT_TRUE(kZero == a);
67 a *= static_cast <uint64_t>(123);
68 EXPECT_TRUE(kZero == a);
71 b *= static_cast<uint64_t>(1);
72 EXPECT_TRUE(kOne == b);
73 b *= static_cast<uint64_t>(0);
74 EXPECT_TRUE(kZero == b);
77 c *= static_cast<uint64_t>(456u);
78 EXPECT_TRUE(BigInteger(123u * 456u) == c);
79 c *= RAPIDJSON_UINT64_C2(0xFFFFFFFF, 0xFFFFFFFF);
80 EXPECT_TRUE(BIGINTEGER_LITERAL("1034640981606221330982120") == c);
81 c *= RAPIDJSON_UINT64_C2(0xFFFFFFFF, 0xFFFFFFFF);
82 EXPECT_TRUE(BIGINTEGER_LITERAL("19085757395861596536664473018420572782123800") == c);
85 TEST(BigInteger, MultiplyUint32) {
87 a *= static_cast <uint32_t>(0);
88 EXPECT_TRUE(kZero == a);
89 a *= static_cast <uint32_t>(123);
90 EXPECT_TRUE(kZero == a);
93 b *= static_cast<uint32_t>(1);
94 EXPECT_TRUE(kOne == b);
95 b *= static_cast<uint32_t>(0);
96 EXPECT_TRUE(kZero == b);
99 c *= static_cast<uint32_t>(456u);
100 EXPECT_TRUE(BigInteger(123u * 456u) == c);
102 EXPECT_TRUE(BIGINTEGER_LITERAL("240896125641960") == c);
104 EXPECT_TRUE(BIGINTEGER_LITERAL("1034640981124429079698200") == c);
107 TEST(BigInteger, LeftShift) {
108 BigInteger a = kZero;
110 EXPECT_TRUE(kZero == a);
112 EXPECT_TRUE(kZero == a);
116 EXPECT_TRUE(BigInteger(123) == a);
118 EXPECT_TRUE(BigInteger(246) == a);
120 EXPECT_TRUE(BIGINTEGER_LITERAL("4537899042132549697536") == a);
122 EXPECT_TRUE(BIGINTEGER_LITERAL("2876235222267216943024851750785644982682875244576768") == a);
125 TEST(BigInteger, Compare) {
126 EXPECT_EQ(0, kZero.Compare(kZero));
127 EXPECT_EQ(1, kOne.Compare(kZero));
128 EXPECT_EQ(-1, kZero.Compare(kOne));
129 EXPECT_EQ(0, kUint64Max.Compare(kUint64Max));
130 EXPECT_EQ(0, kTwo64.Compare(kTwo64));
131 EXPECT_EQ(-1, kUint64Max.Compare(kTwo64));
132 EXPECT_EQ(1, kTwo64.Compare(kUint64Max));