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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 class _Double implements double { | 5 class _Double implements double { |
6 factory _Double.fromInteger(int value) | 6 factory _Double.fromInteger(int value) |
7 native "Double_doubleFromInteger"; | 7 native "Double_doubleFromInteger"; |
8 | 8 |
9 // TODO: Make a stared static method for hashCode and _identityHashCode | 9 // TODO: Make a stared static method for hashCode and _identityHashCode |
10 // when semantics are corrected as described in: | 10 // when semantics are corrected as described in: |
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268 } else { | 268 } else { |
269 return EQUAL; | 269 return EQUAL; |
270 } | 270 } |
271 } else if (isNaN) { | 271 } else if (isNaN) { |
272 return other.isNaN ? EQUAL : GREATER; | 272 return other.isNaN ? EQUAL : GREATER; |
273 } else { | 273 } else { |
274 // Other is NaN. | 274 // Other is NaN. |
275 return LESS; | 275 return LESS; |
276 } | 276 } |
277 } | 277 } |
278 | |
279 static const int _FRACTIONAL_BITS = // Bits to keep after the decimal point. | |
280 const int.fromEnvironment("doubleFractionalBits", defaultValue: 20); | |
281 static const double _BIAS = 1.5 * (1 << (52 - _FRACTIONAL_BITS)); | |
282 | |
283 // Returns this with only _FRACTIONAL_BITS bits after the decimal point. | |
284 double get p => this + _BIAS - _BIAS; | |
285 } | 278 } |
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