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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 int get hashCode { | 8 int get hashCode { |
9 try { | 9 try { |
10 return toInt(); | 10 return toInt(); |
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107 double floor() native "Double_floor"; | 107 double floor() native "Double_floor"; |
108 double ceil () native "Double_ceil"; | 108 double ceil () native "Double_ceil"; |
109 double truncate() native "Double_truncate"; | 109 double truncate() native "Double_truncate"; |
110 int toInt() native "Double_toInt"; | 110 int toInt() native "Double_toInt"; |
111 double toDouble() { return this; } | 111 double toDouble() { return this; } |
112 | 112 |
113 double pow(num exponent) { | 113 double pow(num exponent) { |
114 if (exponent == 0) { | 114 if (exponent == 0) { |
115 return 1.0; // ECMA-262 15.8.2.13 | 115 return 1.0; // ECMA-262 15.8.2.13 |
116 } | 116 } |
117 if (exponent is! num) { | 117 // Throw NullPointerException if exponent is null. |
118 throw new ArgumentError(null); | |
119 } | |
120 double doubleExponent = exponent.toDouble(); | 118 double doubleExponent = exponent.toDouble(); |
121 if (isNaN || exponent.isNaN) { | 119 if (isNaN || exponent.isNaN) { |
122 return double.NAN; | 120 return double.NAN; |
123 } | 121 } |
124 return _pow(doubleExponent); | 122 return _pow(doubleExponent); |
125 } | 123 } |
126 double _pow(double exponent) native "Double_pow"; | 124 double _pow(double exponent) native "Double_pow"; |
127 | 125 |
128 String toStringAsFixed(int fractionDigits) { | 126 String toStringAsFixed(int fractionDigits) { |
129 // See ECMAScript-262, 15.7.4.5 for details. | 127 // See ECMAScript-262, 15.7.4.5 for details. |
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223 return EQUAL; | 221 return EQUAL; |
224 } | 222 } |
225 } else if (isNaN) { | 223 } else if (isNaN) { |
226 return other.isNaN ? EQUAL : GREATER; | 224 return other.isNaN ? EQUAL : GREATER; |
227 } else { | 225 } else { |
228 // Other is NaN. | 226 // Other is NaN. |
229 return LESS; | 227 return LESS; |
230 } | 228 } |
231 } | 229 } |
232 } | 230 } |
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