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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 | 5 |
6 /** | 6 /** |
7 * Decodes the UTF-16 bytes as an iterable. Thus, the consumer can only convert | 7 * Decodes the UTF-16 bytes as an iterable. Thus, the consumer can only convert |
8 * as much of the input as needed. Determines the byte order from the BOM, | 8 * as much of the input as needed. Determines the byte order from the BOM, |
9 * or uses big-endian as a default. This method always strips a leading BOM. | 9 * or uses big-endian as a default. This method always strips a leading BOM. |
10 * Set the [replacementCodepoint] to null to throw an ArgumentError | 10 * Set the [replacementCodepoint] to null to throw an ArgumentError |
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257 } | 257 } |
258 | 258 |
259 /** | 259 /** |
260 * Provides a fast way to decode the rest of the source bytes in a single | 260 * Provides a fast way to decode the rest of the source bytes in a single |
261 * call. This method trades memory for improved speed in that it potentially | 261 * call. This method trades memory for improved speed in that it potentially |
262 * over-allocates the List containing results. | 262 * over-allocates the List containing results. |
263 */ | 263 */ |
264 List<int> decodeRest() { | 264 List<int> decodeRest() { |
265 List<int> codeunits = new List<int>(remaining); | 265 List<int> codeunits = new List<int>(remaining); |
266 int i = 0; | 266 int i = 0; |
267 while (hasNext()) { | 267 while (hasNext) { |
268 codeunits[i++] = next(); | 268 codeunits[i++] = next(); |
269 } | 269 } |
270 if (i == codeunits.length) { | 270 if (i == codeunits.length) { |
271 return codeunits; | 271 return codeunits; |
272 } else { | 272 } else { |
273 List<int> truncCodeunits = new List<int>(i); | 273 List<int> truncCodeunits = new List<int>(i); |
274 truncCodeunits.setRange(0, i, codeunits); | 274 truncCodeunits.setRange(0, i, codeunits); |
275 return truncCodeunits; | 275 return truncCodeunits; |
276 } | 276 } |
277 } | 277 } |
278 | 278 |
279 bool hasNext() => utf16EncodedBytesIterator.hasNext(); | 279 bool get hasNext => utf16EncodedBytesIterator.hasNext; |
280 | 280 |
281 int next() { | 281 int next() { |
282 if (utf16EncodedBytesIterator.remaining < 2) { | 282 if (utf16EncodedBytesIterator.remaining < 2) { |
283 utf16EncodedBytesIterator.next(); | 283 utf16EncodedBytesIterator.next(); |
284 if (replacementCodepoint != null) { | 284 if (replacementCodepoint != null) { |
285 return replacementCodepoint; | 285 return replacementCodepoint; |
286 } else { | 286 } else { |
287 throw new ArgumentError( | 287 throw new ArgumentError( |
288 "Invalid UTF16 at ${utf16EncodedBytesIterator.position}"); | 288 "Invalid UTF16 at ${utf16EncodedBytesIterator.position}"); |
289 } | 289 } |
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343 skip(); | 343 skip(); |
344 } | 344 } |
345 } | 345 } |
346 | 346 |
347 int decode() { | 347 int decode() { |
348 int lo = utf16EncodedBytesIterator.next(); | 348 int lo = utf16EncodedBytesIterator.next(); |
349 int hi = utf16EncodedBytesIterator.next(); | 349 int hi = utf16EncodedBytesIterator.next(); |
350 return (hi << 8) + lo; | 350 return (hi << 8) + lo; |
351 } | 351 } |
352 } | 352 } |
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