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1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2013, 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 part of dart.convert; | 5 part of dart.convert; |
6 | 6 |
7 /** The Unicode Replacement character `U+FFFD` (�). */ | 7 /** The Unicode Replacement character `U+FFFD` (�). */ |
8 const int UNICODE_REPLACEMENT_CHARACTER_RUNE = 0xFFFD; | 8 const int UNICODE_REPLACEMENT_CHARACTER_RUNE = 0xFFFD; |
9 | 9 |
10 /** The Unicode Byte Order Marker (BOM) character `U+FEFF`. */ | 10 /** The Unicode Byte Order Marker (BOM) character `U+FEFF`. */ |
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69 Utf8Encoder get encoder => const Utf8Encoder(); | 69 Utf8Encoder get encoder => const Utf8Encoder(); |
70 Utf8Decoder get decoder { | 70 Utf8Decoder get decoder { |
71 return new Utf8Decoder(allowMalformed: _allowMalformed); | 71 return new Utf8Decoder(allowMalformed: _allowMalformed); |
72 } | 72 } |
73 } | 73 } |
74 | 74 |
75 /** | 75 /** |
76 * This class converts strings to their UTF-8 code units (a list of | 76 * This class converts strings to their UTF-8 code units (a list of |
77 * unsigned 8-bit integers). | 77 * unsigned 8-bit integers). |
78 */ | 78 */ |
79 class Utf8Encoder extends Converter<String, List<int>> { | 79 class Utf8Encoder extends Converter<String, List<int>> |
| 80 implements ChunkedConverter<String, List<int>, String, List<int>> { |
80 const Utf8Encoder(); | 81 const Utf8Encoder(); |
81 | 82 |
82 /** | 83 /** |
83 * Converts [string] to its UTF-8 code units (a list of | 84 * Converts [string] to its UTF-8 code units (a list of |
84 * unsigned 8-bit integers). | 85 * unsigned 8-bit integers). |
85 * | 86 * |
86 * If [start] and [end] are provided, only the substring | 87 * If [start] and [end] are provided, only the substring |
87 * `string.substring(start, end)` is converted. | 88 * `string.substring(start, end)` is converted. |
88 */ | 89 */ |
89 List<int> convert(String string, [int start = 0, int end]) { | 90 List<int> convert(String string, [int start = 0, int end]) { |
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295 } | 296 } |
296 | 297 |
297 // TODO(floitsch): implement asUtf8Sink. Sligthly complicated because it | 298 // TODO(floitsch): implement asUtf8Sink. Sligthly complicated because it |
298 // needs to deal with malformed input. | 299 // needs to deal with malformed input. |
299 } | 300 } |
300 | 301 |
301 /** | 302 /** |
302 * This class converts UTF-8 code units (lists of unsigned 8-bit integers) | 303 * This class converts UTF-8 code units (lists of unsigned 8-bit integers) |
303 * to a string. | 304 * to a string. |
304 */ | 305 */ |
305 class Utf8Decoder extends Converter<List<int>, String> { | 306 class Utf8Decoder extends Converter<List<int>, String> |
| 307 implements ChunkedConverter<List<int>, String, List<int>, String> { |
306 final bool _allowMalformed; | 308 final bool _allowMalformed; |
307 | 309 |
308 /** | 310 /** |
309 * Instantiates a new [Utf8Decoder]. | 311 * Instantiates a new [Utf8Decoder]. |
310 * | 312 * |
311 * The optional [allowMalformed] argument defines how [convert] deals | 313 * The optional [allowMalformed] argument defines how [convert] deals |
312 * with invalid or unterminated character sequences. | 314 * with invalid or unterminated character sequences. |
313 * | 315 * |
314 * If it is `true` [convert] replaces invalid (or unterminated) character | 316 * If it is `true` [convert] replaces invalid (or unterminated) character |
315 * sequences with the Unicode Replacement character `U+FFFD` (�). Otherwise | 317 * sequences with the Unicode Replacement character `U+FFFD` (�). Otherwise |
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578 } | 580 } |
579 break loop; | 581 break loop; |
580 } | 582 } |
581 if (expectedUnits > 0) { | 583 if (expectedUnits > 0) { |
582 _value = value; | 584 _value = value; |
583 _expectedUnits = expectedUnits; | 585 _expectedUnits = expectedUnits; |
584 _extraUnits = extraUnits; | 586 _extraUnits = extraUnits; |
585 } | 587 } |
586 } | 588 } |
587 } | 589 } |
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