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1 // Copyright (c) 2015, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2015, the Dart project authors. Please see the AUTHORS file |
2 // for details. All rights reserved. Use of this source code is governed by a | 2 // for details. All rights reserved. Use of this source code is governed by a |
3 // BSD-style license that can be found in the LICENSE file. | 3 // BSD-style license that can be found in the LICENSE file. |
4 | 4 |
5 import "package:expect/expect.dart"; | 5 import "package:expect/expect.dart"; |
6 | 6 |
7 import "dart:math" show pow; | 7 import "dart:math" show pow; |
8 | 8 |
9 var smallNumber = 1234567890; // is 31-bit integer. | 9 var smallNumber = 1234567890; // is 31-bit integer. |
10 var mediumNumber = 1234567890123456; // is 53-bit integer | 10 var mediumNumber = 1234567890123456; // is 53-bit integer |
11 var bigNumber = 590295810358705600000; // is > 64-bit integer, exact as double. | 11 var bigNumber = 590295810358705600000; // is > 64-bit integer, exact as double. |
12 | 12 |
13 testModPow() { | 13 testModPow() { |
14 test(x, e, m, expectedResult) { | 14 test(x, e, m, expectedResult) { |
15 // Check that expected result is correct, using an unoptimized version. | 15 // Check that expected result is correct, using an unoptimized version. |
16 assert(() { | 16 assert(() { |
17 if (1 is double) return true; // Don't have bignums. | 17 if (1 is double) return true; // Don't have bignums. |
18 slowModPow(x, e, m) { | 18 slowModPow(x, e, m) { |
19 var r = 1; | 19 var r = 1; |
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111 test(19, 1234567890, 519818059); | 111 test(19, 1234567890, 519818059); |
112 test(1000000001, 1234567890, 1001100101); | 112 test(1000000001, 1234567890, 1001100101); |
113 | 113 |
114 test(12345, 12346, 12345); | 114 test(12345, 12346, 12345); |
115 test(12345, 12346, 12345); | 115 test(12345, 12346, 12345); |
116 | 116 |
117 test(smallNumber, 137, 42); | 117 test(smallNumber, 137, 42); |
118 test(137, smallNumber, 856087223); | 118 test(137, smallNumber, 856087223); |
119 test(mediumNumber, 137, 77); | 119 test(mediumNumber, 137, 77); |
120 test(137, mediumNumber, 540686667207353); | 120 test(137, mediumNumber, 540686667207353); |
121 test(bigNumber, 137, 128); /// bignum: ok | 121 test(bigNumber, 137, 128); // /// bignum: ok |
122 // Bigger numbers as modulo is tested in big_integer_arith_vm_test.dart. | 122 // Bigger numbers as modulo is tested in big_integer_arith_vm_test.dart. |
123 // Big doubles are not co-prime, so there is nothing to test for dart2js. | 123 // Big doubles are not co-prime, so there is nothing to test for dart2js. |
124 } | 124 } |
125 | 125 |
126 testGcd() { | 126 testGcd() { |
127 // Call testFunc with all combinations and orders of plus/minus | 127 // Call testFunc with all combinations and orders of plus/minus |
128 // value and other. | 128 // value and other. |
129 callCombos(value, other, testFunc) { | 129 callCombos(value, other, testFunc) { |
130 testFunc(value, other); | 130 testFunc(value, other); |
131 testFunc(value, -other); | 131 testFunc(value, -other); |
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162 callCombos(value, other, (a, b) { | 162 callCombos(value, other, (a, b) { |
163 Expect.throws(() => a.gcd(b), null, "$a.gcd($b)"); | 163 Expect.throws(() => a.gcd(b), null, "$a.gcd($b)"); |
164 }); | 164 }); |
165 } | 165 } |
166 | 166 |
167 testThrows(2.5, 5); // Not a method on double. | 167 testThrows(2.5, 5); // Not a method on double. |
168 testThrows(5, 2.5); // Not accepting non-int arguments. | 168 testThrows(5, 2.5); // Not accepting non-int arguments. |
169 | 169 |
170 // Format: | 170 // Format: |
171 // test(value1, value2, expectedResult); | 171 // test(value1, value2, expectedResult); |
172 test(1, 1, 1); // both are 1 | 172 test(1, 1, 1); // both are 1 |
173 test(1, 2, 1); // one is 1 | 173 test(1, 2, 1); // one is 1 |
174 test(3, 5, 1); // coprime. | 174 test(3, 5, 1); // coprime. |
175 test(37, 37, 37); // Same larger prime. | 175 test(37, 37, 37); // Same larger prime. |
176 | 176 |
177 test(9999, 7272, 909); // Larger numbers | 177 test(9999, 7272, 909); // Larger numbers |
178 | 178 |
179 test(0, 1000, 1000); // One operand is zero. | 179 test(0, 1000, 1000); // One operand is zero. |
180 test(0, 0, 0); // Both operands are zero. | 180 test(0, 0, 0); // Both operands are zero. |
181 | 181 |
182 // Multiplying both operands by a number multiplies result by same number. | 182 // Multiplying both operands by a number multiplies result by same number. |
183 test(693, 609, 21); | 183 test(693, 609, 21); |
184 test(693 << 5, 609 << 5, 21 << 5); | 184 test(693 << 5, 609 << 5, 21 << 5); |
185 test(693 * 937, 609 * 937, 21 * 937); | 185 test(693 * 937, 609 * 937, 21 * 937); |
186 test(693 * pow(2, 32), 609 * pow(2, 32), 21 * pow(2, 32)); | 186 test(693 * pow(2, 32), 609 * pow(2, 32), 21 * pow(2, 32)); |
187 test(693 * pow(2, 52), 609 * pow(2, 52), 21 * pow(2, 52)); | 187 test(693 * pow(2, 52), 609 * pow(2, 52), 21 * pow(2, 52)); |
188 test(693 * pow(2, 53), 609 * pow(2, 53), 21 * pow(2, 53)); // Regression. | 188 test(693 * pow(2, 53), 609 * pow(2, 53), 21 * pow(2, 53)); // Regression. |
189 test(693 * pow(2, 99), 609 * pow(2, 99), 21 * pow(2, 99)); | 189 test(693 * pow(2, 99), 609 * pow(2, 99), 21 * pow(2, 99)); |
190 | 190 |
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201 (pow(2, 26) - 1) * pow(2, 22), | 201 (pow(2, 26) - 1) * pow(2, 22), |
202 (pow(2, 26) - 1) * pow(2, 14)); | 202 (pow(2, 26) - 1) * pow(2, 14)); |
203 } | 203 } |
204 | 204 |
205 main() { | 205 main() { |
206 testModPow(); /// modPow: ok | 206 testModPow(); /// modPow: ok |
207 testModInverse(); | 207 testModInverse(); |
208 testGcd(); | 208 testGcd(); |
209 } | 209 } |
210 | 210 |
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