OLD | NEW |
1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2012, 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 // TODO(srdjan): fix limitations. | 5 // TODO(srdjan): fix limitations. |
6 // - shift amount must be a Smi. | 6 // - shift amount must be a Smi. |
7 class IntegerImplementation { | 7 class IntegerImplementation { |
8 factory IntegerImplementation._uninstantiable() { | 8 factory IntegerImplementation._uninstantiable() { |
9 throw const UnsupportedOperationException( | 9 throw const UnsupportedOperationException( |
10 "IntegerImplementation can only be allocated by the VM"); | 10 "IntegerImplementation can only be allocated by the VM"); |
(...skipping 77 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
88 bool equalToInteger(int other) native "Integer_equalToInteger"; | 88 bool equalToInteger(int other) native "Integer_equalToInteger"; |
89 int abs() { | 89 int abs() { |
90 return this < 0 ? -this : this; | 90 return this < 0 ? -this : this; |
91 } | 91 } |
92 bool isEven() { return ((this & 1) === 0); } | 92 bool isEven() { return ((this & 1) === 0); } |
93 bool isOdd() { return !isEven(); } | 93 bool isOdd() { return !isEven(); } |
94 bool isNaN() { return false; } | 94 bool isNaN() { return false; } |
95 bool isNegative() { return this < 0; } | 95 bool isNegative() { return this < 0; } |
96 bool isInfinite() { return false; } | 96 bool isInfinite() { return false; } |
97 | 97 |
98 int compareTo(Comparable other) { | 98 int compareTo(num other) { |
99 final int EQUAL = 0, LESS = -1, GREATER = 1; | 99 final int EQUAL = 0, LESS = -1, GREATER = 1; |
| 100 if (other is double) { |
| 101 // TODO(floitsch): the following locals should be 'const'. |
| 102 int MAX_EXACT_INT_TO_DOUBLE = 9007199254740992; // 2^53. |
| 103 int MIN_EXACT_INT_TO_DOUBLE = -MAX_EXACT_INT_TO_DOUBLE; |
| 104 double d = other; |
| 105 if (d.isInfinite()) { |
| 106 return d == double.NEGATIVE_INFINITY ? GREATER : LESS; |
| 107 } |
| 108 if (d.isNaN()) { |
| 109 return LESS; |
| 110 } |
| 111 if (MIN_EXACT_INT_TO_DOUBLE <= this && this <= MAX_EXACT_INT_TO_DOUBLE) { |
| 112 // Let the double implementation deal with -0.0. |
| 113 return -(d.compareTo(this.toDouble())); |
| 114 } else { |
| 115 // If abs(other) > MAX_EXACT_INT_TO_DOUBLE, then other has an integer |
| 116 // value (no bits below the decimal point). |
| 117 other = d.toInt(); |
| 118 } |
| 119 } |
100 if (this < other) { | 120 if (this < other) { |
101 return LESS; | 121 return LESS; |
102 } else if (this > other) { | 122 } else if (this > other) { |
103 return GREATER; | 123 return GREATER; |
104 } else if (this == other) { | 124 } else { |
105 return EQUAL; | 125 return EQUAL; |
106 } else { | |
107 // Other is NaN. | |
108 return LESS; | |
109 } | 126 } |
110 } | 127 } |
111 | 128 |
112 int round() { return this; } | 129 int round() { return this; } |
113 int floor() { return this; } | 130 int floor() { return this; } |
114 int ceil() { return this; } | 131 int ceil() { return this; } |
115 int truncate() { return this; } | 132 int truncate() { return this; } |
116 | 133 |
117 int toInt() { return this; } | 134 int toInt() { return this; } |
118 double toDouble() { return new Double.fromInteger(this); } | 135 double toDouble() { return new Double.fromInteger(this); } |
(...skipping 100 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
219 } | 236 } |
220 } | 237 } |
221 int shlFromInt(int other) { | 238 int shlFromInt(int other) { |
222 throw const OutOfMemoryException(); | 239 throw const OutOfMemoryException(); |
223 } | 240 } |
224 | 241 |
225 int pow(int exponent) { | 242 int pow(int exponent) { |
226 throw "Bigint.pow not implemented"; | 243 throw "Bigint.pow not implemented"; |
227 } | 244 } |
228 } | 245 } |
OLD | NEW |