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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 // Dart core library. | 4 // Dart core library. |
5 | 5 |
6 // VM implementation of int. | 6 // VM implementation of int. |
7 | 7 |
8 patch class int { | 8 patch class int { |
9 static int _parse(String str) native "Integer_parse"; | 9 static int _parse(String str) native "Integer_parse"; |
10 | 10 |
11 static void _throwFormatException(String source) { | 11 static int _throwFormatException(String source) { |
12 throw new FormatException(source); | 12 throw new FormatException(source); |
13 } | 13 } |
14 | 14 |
15 /* patch */ static int parse(String source, | 15 /* patch */ static int parse(String source, |
16 { int radix, | 16 { int radix, |
17 int onError(String str) }) { | 17 int onError(String str) }) { |
18 if (source is! String) throw new ArgumentError(source); | 18 if (source is! String) throw new ArgumentError(source); |
19 if (radix == null) { | 19 if (radix == null) { |
20 if (onError == null) return _parse(source); | 20 if (onError == null) return _parse(source); |
21 try { | 21 try { |
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62 int digit = digits[code - 0x30]; | 62 int digit = digits[code - 0x30]; |
63 if (digit >= radix) return onError(source); | 63 if (digit >= radix) return onError(source); |
64 result = result * radix + digit; | 64 result = result * radix + digit; |
65 i++; | 65 i++; |
66 if (i == source.length) break; | 66 if (i == source.length) break; |
67 code = source.charCodeAt(i); | 67 code = source.charCodeAt(i); |
68 } while (true); | 68 } while (true); |
69 return negative ? -result : result; | 69 return negative ? -result : result; |
70 } | 70 } |
71 } | 71 } |
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