scriptnum_tests.cpp raw
1 // Copyright (c) 2012-present 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 <script/script.h>
6 #include <test/scriptnum10.h>
7 #include <test/util/setup_common.h>
8
9 #include <boost/test/unit_test.hpp>
10 #include <climits>
11 #include <cstdint>
12
13 BOOST_FIXTURE_TEST_SUITE(scriptnum_tests, BasicTestingSetup)
14
15 /** A selection of numbers that do not trigger int64_t overflow
16 * when added/subtracted. */
17 static const int64_t values[] = { 0, 1, -2, 127, 128, -255, 256, (1LL << 15) - 1, -(1LL << 16), (1LL << 24) - 1, (1LL << 31), 1 - (1LL << 32), 1LL << 40 };
18
19 static const int64_t offsets[] = { 1, 0x79, 0x80, 0x81, 0xFF, 0x7FFF, 0x8000, 0xFFFF, 0x10000};
20
21 static bool verify(const CScriptNum10& bignum, const CScriptNum& scriptnum)
22 {
23 return bignum.getvch() == scriptnum.getvch() && bignum.getint() == scriptnum.getint();
24 }
25
26 static void CheckCreateVch(const int64_t& num)
27 {
28 CScriptNum10 bignum(num);
29 CScriptNum scriptnum(num);
30 BOOST_CHECK(verify(bignum, scriptnum));
31
32 CScriptNum10 bignum2(bignum.getvch(), false);
33 CScriptNum scriptnum2(scriptnum.getvch(), false);
34 BOOST_CHECK(verify(bignum2, scriptnum2));
35
36 CScriptNum10 bignum3(scriptnum2.getvch(), false);
37 CScriptNum scriptnum3(bignum2.getvch(), false);
38 BOOST_CHECK(verify(bignum3, scriptnum3));
39 }
40
41 static void CheckCreateInt(const int64_t& num)
42 {
43 CScriptNum10 bignum(num);
44 CScriptNum scriptnum(num);
45 BOOST_CHECK(verify(bignum, scriptnum));
46 BOOST_CHECK(verify(CScriptNum10(bignum.getint()), CScriptNum(scriptnum.getint())));
47 BOOST_CHECK(verify(CScriptNum10(scriptnum.getint()), CScriptNum(bignum.getint())));
48 BOOST_CHECK(verify(CScriptNum10(CScriptNum10(scriptnum.getint()).getint()), CScriptNum(CScriptNum(bignum.getint()).getint())));
49 }
50
51
52 static void CheckAdd(const int64_t& num1, const int64_t& num2)
53 {
54 const CScriptNum10 bignum1(num1);
55 const CScriptNum10 bignum2(num2);
56 const CScriptNum scriptnum1(num1);
57 const CScriptNum scriptnum2(num2);
58 CScriptNum10 bignum3(num1);
59 CScriptNum10 bignum4(num1);
60 CScriptNum scriptnum3(num1);
61 CScriptNum scriptnum4(num1);
62
63 // int64_t overflow is undefined.
64 bool invalid = (((num2 > 0) && (num1 > (std::numeric_limits<int64_t>::max() - num2))) ||
65 ((num2 < 0) && (num1 < (std::numeric_limits<int64_t>::min() - num2))));
66 if (!invalid)
67 {
68 BOOST_CHECK(verify(bignum1 + bignum2, scriptnum1 + scriptnum2));
69 BOOST_CHECK(verify(bignum1 + bignum2, scriptnum1 + num2));
70 BOOST_CHECK(verify(bignum1 + bignum2, scriptnum2 + num1));
71 }
72 }
73
74 static void CheckNegate(const int64_t& num)
75 {
76 const CScriptNum10 bignum(num);
77 const CScriptNum scriptnum(num);
78
79 // -INT64_MIN is undefined
80 if (num != std::numeric_limits<int64_t>::min())
81 BOOST_CHECK(verify(-bignum, -scriptnum));
82 }
83
84 static void CheckSubtract(const int64_t& num1, const int64_t& num2)
85 {
86 const CScriptNum10 bignum1(num1);
87 const CScriptNum10 bignum2(num2);
88 const CScriptNum scriptnum1(num1);
89 const CScriptNum scriptnum2(num2);
90
91 // int64_t overflow is undefined.
92 bool invalid = ((num2 > 0 && num1 < std::numeric_limits<int64_t>::min() + num2) ||
93 (num2 < 0 && num1 > std::numeric_limits<int64_t>::max() + num2));
94 if (!invalid)
95 {
96 BOOST_CHECK(verify(bignum1 - bignum2, scriptnum1 - scriptnum2));
97 BOOST_CHECK(verify(bignum1 - bignum2, scriptnum1 - num2));
98 }
99
100 invalid = ((num1 > 0 && num2 < std::numeric_limits<int64_t>::min() + num1) ||
101 (num1 < 0 && num2 > std::numeric_limits<int64_t>::max() + num1));
102 if (!invalid)
103 {
104 BOOST_CHECK(verify(bignum2 - bignum1, scriptnum2 - scriptnum1));
105 BOOST_CHECK(verify(bignum2 - bignum1, scriptnum2 - num1));
106 }
107 }
108
109 static void CheckCompare(const int64_t& num1, const int64_t& num2)
110 {
111 const CScriptNum10 bignum1(num1);
112 const CScriptNum10 bignum2(num2);
113 const CScriptNum scriptnum1(num1);
114 const CScriptNum scriptnum2(num2);
115
116 BOOST_CHECK((bignum1 == bignum1) == (scriptnum1 == scriptnum1));
117 BOOST_CHECK((bignum1 != bignum1) == (scriptnum1 != scriptnum1));
118 BOOST_CHECK((bignum1 < bignum1) == (scriptnum1 < scriptnum1));
119 BOOST_CHECK((bignum1 > bignum1) == (scriptnum1 > scriptnum1));
120 BOOST_CHECK((bignum1 >= bignum1) == (scriptnum1 >= scriptnum1));
121 BOOST_CHECK((bignum1 <= bignum1) == (scriptnum1 <= scriptnum1));
122
123 BOOST_CHECK((bignum1 == bignum1) == (scriptnum1 == num1));
124 BOOST_CHECK((bignum1 != bignum1) == (scriptnum1 != num1));
125 BOOST_CHECK((bignum1 < bignum1) == (scriptnum1 < num1));
126 BOOST_CHECK((bignum1 > bignum1) == (scriptnum1 > num1));
127 BOOST_CHECK((bignum1 >= bignum1) == (scriptnum1 >= num1));
128 BOOST_CHECK((bignum1 <= bignum1) == (scriptnum1 <= num1));
129
130 BOOST_CHECK((bignum1 == bignum2) == (scriptnum1 == scriptnum2));
131 BOOST_CHECK((bignum1 != bignum2) == (scriptnum1 != scriptnum2));
132 BOOST_CHECK((bignum1 < bignum2) == (scriptnum1 < scriptnum2));
133 BOOST_CHECK((bignum1 > bignum2) == (scriptnum1 > scriptnum2));
134 BOOST_CHECK((bignum1 >= bignum2) == (scriptnum1 >= scriptnum2));
135 BOOST_CHECK((bignum1 <= bignum2) == (scriptnum1 <= scriptnum2));
136
137 BOOST_CHECK((bignum1 == bignum2) == (scriptnum1 == num2));
138 BOOST_CHECK((bignum1 != bignum2) == (scriptnum1 != num2));
139 BOOST_CHECK((bignum1 < bignum2) == (scriptnum1 < num2));
140 BOOST_CHECK((bignum1 > bignum2) == (scriptnum1 > num2));
141 BOOST_CHECK((bignum1 >= bignum2) == (scriptnum1 >= num2));
142 BOOST_CHECK((bignum1 <= bignum2) == (scriptnum1 <= num2));
143 }
144
145 static void RunCreate(const int64_t& num)
146 {
147 CheckCreateInt(num);
148 CScriptNum scriptnum(num);
149 if (scriptnum.getvch().size() <= CScriptNum::nDefaultMaxNumSize)
150 CheckCreateVch(num);
151 else
152 {
153 BOOST_CHECK_THROW (CheckCreateVch(num), scriptnum10_error);
154 }
155 }
156
157 static void RunOperators(const int64_t& num1, const int64_t& num2)
158 {
159 CheckAdd(num1, num2);
160 CheckSubtract(num1, num2);
161 CheckNegate(num1);
162 CheckCompare(num1, num2);
163 }
164
165 BOOST_AUTO_TEST_CASE(creation)
166 {
167 for(size_t i = 0; i < std::size(values); ++i)
168 {
169 for(size_t j = 0; j < std::size(offsets); ++j)
170 {
171 RunCreate(values[i]);
172 RunCreate(values[i] + offsets[j]);
173 RunCreate(values[i] - offsets[j]);
174 }
175 }
176 }
177
178 BOOST_AUTO_TEST_CASE(operators)
179 {
180 for(size_t i = 0; i < std::size(values); ++i)
181 {
182 for(size_t j = 0; j < std::size(offsets); ++j)
183 {
184 RunOperators(values[i], values[i]);
185 RunOperators(values[i], -values[i]);
186 RunOperators(values[i], values[j]);
187 RunOperators(values[i], -values[j]);
188 RunOperators(values[i] + values[j], values[j]);
189 RunOperators(values[i] + values[j], -values[j]);
190 RunOperators(values[i] - values[j], values[j]);
191 RunOperators(values[i] - values[j], -values[j]);
192 RunOperators(values[i] + values[j], values[i] + values[j]);
193 RunOperators(values[i] + values[j], values[i] - values[j]);
194 RunOperators(values[i] - values[j], values[i] + values[j]);
195 RunOperators(values[i] - values[j], values[i] - values[j]);
196 }
197 }
198 }
199
200 BOOST_AUTO_TEST_SUITE_END()
201