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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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150 String _toStringAsFixed(int fractionDigits) native "Double_toStringAsFixed"; | 150 String _toStringAsFixed(int fractionDigits) native "Double_toStringAsFixed"; |
151 | 151 |
152 String toStringAsExponential(int fractionDigits) { | 152 String toStringAsExponential(int fractionDigits) { |
153 // See ECMAScript-262, 15.7.4.6 for details. | 153 // See ECMAScript-262, 15.7.4.6 for details. |
154 | 154 |
155 // The EcmaScript specification checks for NaN and Infinity before looking | 155 // The EcmaScript specification checks for NaN and Infinity before looking |
156 // at the fractionDigits. In Dart we are consistent with toStringAsFixed and | 156 // at the fractionDigits. In Dart we are consistent with toStringAsFixed and |
157 // look at the fractionDigits first. | 157 // look at the fractionDigits first. |
158 | 158 |
159 // Step 7. | 159 // Step 7. |
160 if (fractionDigits !== null && | 160 if (fractionDigits != null && |
161 (fractionDigits < 0 || fractionDigits > 20)) { | 161 (fractionDigits < 0 || fractionDigits > 20)) { |
162 // TODO(antonm): should be proper RangeError or Dart counterpart. | 162 // TODO(antonm): should be proper RangeError or Dart counterpart. |
163 throw "Range error"; | 163 throw "Range error"; |
164 } | 164 } |
165 | 165 |
166 if (isNaN) return "NaN"; | 166 if (isNaN) return "NaN"; |
167 if (this == double.INFINITY) return "Infinity"; | 167 if (this == double.INFINITY) return "Infinity"; |
168 if (this == -double.INFINITY) return "-Infinity"; | 168 if (this == -double.INFINITY) return "-Infinity"; |
169 | 169 |
170 // The dart function prints the shortest representation when fractionDigits | 170 // The dart function prints the shortest representation when fractionDigits |
171 // equals null. The native function wants -1 instead. | 171 // equals null. The native function wants -1 instead. |
172 fractionDigits = (fractionDigits === null) ? -1 : fractionDigits; | 172 fractionDigits = (fractionDigits == null) ? -1 : fractionDigits; |
173 | 173 |
174 return _toStringAsExponential(fractionDigits); | 174 return _toStringAsExponential(fractionDigits); |
175 } | 175 } |
176 String _toStringAsExponential(int fractionDigits) | 176 String _toStringAsExponential(int fractionDigits) |
177 native "Double_toStringAsExponential"; | 177 native "Double_toStringAsExponential"; |
178 | 178 |
179 String toStringAsPrecision(int precision) { | 179 String toStringAsPrecision(int precision) { |
180 // See ECMAScript-262, 15.7.4.7 for details. | 180 // See ECMAScript-262, 15.7.4.7 for details. |
181 | 181 |
182 // The EcmaScript specification checks for NaN and Infinity before looking | 182 // The EcmaScript specification checks for NaN and Infinity before looking |
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221 return EQUAL; | 221 return EQUAL; |
222 } | 222 } |
223 } else if (isNaN) { | 223 } else if (isNaN) { |
224 return other.isNaN ? EQUAL : GREATER; | 224 return other.isNaN ? EQUAL : GREATER; |
225 } else { | 225 } else { |
226 // Other is NaN. | 226 // Other is NaN. |
227 return LESS; | 227 return LESS; |
228 } | 228 } |
229 } | 229 } |
230 } | 230 } |
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