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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 library utils; | 5 library utils; |
6 | 6 |
7 import 'dart:async'; | 7 import 'dart:async'; |
8 import 'dart:crypto'; | 8 import 'dart:crypto'; |
9 import 'dart:io'; | 9 import 'dart:io'; |
10 import 'dart:typed_data'; | 10 import 'dart:typed_data'; |
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87 /// [FormatException] if no [Encoding] was found that corresponds to [charset]. | 87 /// [FormatException] if no [Encoding] was found that corresponds to [charset]. |
88 /// [charset] may not be null. | 88 /// [charset] may not be null. |
89 Encoding requiredEncodingForCharset(String charset) { | 89 Encoding requiredEncodingForCharset(String charset) { |
90 var encoding = Encoding.fromName(charset); | 90 var encoding = Encoding.fromName(charset); |
91 if (encoding != null) return encoding; | 91 if (encoding != null) return encoding; |
92 throw new FormatException('Unsupported encoding "$charset".'); | 92 throw new FormatException('Unsupported encoding "$charset".'); |
93 } | 93 } |
94 | 94 |
95 /// Converts [bytes] into a [String] according to [encoding]. | 95 /// Converts [bytes] into a [String] according to [encoding]. |
96 String decodeString(List<int> bytes, Encoding encoding) { | 96 String decodeString(List<int> bytes, Encoding encoding) { |
97 // TODO(nweiz): implement this once issue 6284 is fixed. | 97 // TODO(nweiz): implement this once issue 6284 is fixed. |
Bob Nystrom
2013/05/16 16:11:39
How about throwing NotImplementedError if [encodin
nweiz
2013/05/16 18:32:46
I suspect most of the time when encodings get set
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98 return new String.fromCharCodes(bytes); | 98 return decodeUtf8(bytes); |
99 } | 99 } |
100 | 100 |
101 /// Converts [string] into a byte array according to [encoding]. | 101 /// Converts [string] into a byte array according to [encoding]. |
102 List<int> encodeString(String string, Encoding encoding) { | 102 List<int> encodeString(String string, Encoding encoding) { |
103 // TODO(nweiz): implement this once issue 6284 is fixed. | 103 // TODO(nweiz): implement this once issue 6284 is fixed. |
Bob Nystrom
2013/05/16 16:11:39
Ditto.
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104 return string.codeUnits; | 104 return encodeUtf8(string); |
105 } | 105 } |
106 | 106 |
107 /// A regular expression that matches strings that are composed entirely of | 107 /// A regular expression that matches strings that are composed entirely of |
108 /// ASCII-compatible characters. | 108 /// ASCII-compatible characters. |
109 final RegExp _ASCII_ONLY = new RegExp(r"^[\x00-\x7F]+$"); | 109 final RegExp _ASCII_ONLY = new RegExp(r"^[\x00-\x7F]+$"); |
110 | 110 |
111 /// Returns whether [string] is composed entirely of ASCII-compatible | 111 /// Returns whether [string] is composed entirely of ASCII-compatible |
112 /// characters. | 112 /// characters. |
113 bool isPlainAscii(String string) => _ASCII_ONLY.hasMatch(string); | 113 bool isPlainAscii(String string) => _ASCII_ONLY.hasMatch(string); |
114 | 114 |
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232 /// The return values of all [Future]s are discarded. Any errors will cause the | 232 /// The return values of all [Future]s are discarded. Any errors will cause the |
233 /// iteration to stop and will be piped through the return value. | 233 /// iteration to stop and will be piped through the return value. |
234 Future forEachFuture(Iterable input, Future fn(element)) { | 234 Future forEachFuture(Iterable input, Future fn(element)) { |
235 var iterator = input.iterator; | 235 var iterator = input.iterator; |
236 Future nextElement(_) { | 236 Future nextElement(_) { |
237 if (!iterator.moveNext()) return new Future.value(); | 237 if (!iterator.moveNext()) return new Future.value(); |
238 return fn(iterator.current).then(nextElement); | 238 return fn(iterator.current).then(nextElement); |
239 } | 239 } |
240 return nextElement(null); | 240 return nextElement(null); |
241 } | 241 } |
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