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Side by Side Diff: sdk/lib/convert/byte_conversion.dart

Issue 2754013002: Format all dart: library files (Closed)
Patch Set: Format all dart: library files Created 3 years, 9 months ago
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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 /** 7 /**
8 * The [ByteConversionSink] provides an interface for converters to 8 * The [ByteConversionSink] provides an interface for converters to
9 * efficiently transmit byte data. 9 * efficiently transmit byte data.
10 * 10 *
11 * Instead of limiting the interface to one non-chunked list of bytes it 11 * Instead of limiting the interface to one non-chunked list of bytes it
12 * accepts its input in chunks (themselves being lists of bytes). 12 * accepts its input in chunks (themselves being lists of bytes).
13 * 13 *
14 * This abstract class will likely get more methods over time. Implementers are 14 * This abstract class will likely get more methods over time. Implementers are
15 * urged to extend or mix in [ByteConversionSinkBase] to ensure that their 15 * urged to extend or mix in [ByteConversionSinkBase] to ensure that their
16 * class covers the newly added methods. 16 * class covers the newly added methods.
17 */ 17 */
18 abstract class ByteConversionSink extends ChunkedConversionSink<List<int>> { 18 abstract class ByteConversionSink extends ChunkedConversionSink<List<int>> {
19 ByteConversionSink(); 19 ByteConversionSink();
20 factory ByteConversionSink.withCallback(void callback(List<int> accumulated)) 20 factory ByteConversionSink.withCallback(
21 = _ByteCallbackSink; 21 void callback(List<int> accumulated)) = _ByteCallbackSink;
22 factory ByteConversionSink.from(Sink<List<int>> sink) 22 factory ByteConversionSink.from(Sink<List<int>> sink) = _ByteAdapterSink;
23 = _ByteAdapterSink;
24 23
25 /** 24 /**
26 * Adds the next [chunk] to `this`. 25 * Adds the next [chunk] to `this`.
27 * 26 *
28 * Adds the bytes defined by [start] and [end]-exclusive to `this`. 27 * Adds the bytes defined by [start] and [end]-exclusive to `this`.
29 * 28 *
30 * If [isLast] is `true` closes `this`. 29 * If [isLast] is `true` closes `this`.
31 * 30 *
32 * Contrary to `add` the given [chunk] must not be held onto. Once the method 31 * Contrary to `add` the given [chunk] must not be held onto. Once the method
33 * returns, it is safe to overwrite the data in it. 32 * returns, it is safe to overwrite the data in it.
34 */ 33 */
35 void addSlice(List<int> chunk, int start, int end, bool isLast); 34 void addSlice(List<int> chunk, int start, int end, bool isLast);
36 35
37 // TODO(floitsch): add more methods: 36 // TODO(floitsch): add more methods:
38 // - iterateBytes. 37 // - iterateBytes.
39 } 38 }
40 39
41 /** 40 /**
42 * This class provides a base-class for converters that need to accept byte 41 * This class provides a base-class for converters that need to accept byte
43 * inputs. 42 * inputs.
44 */ 43 */
45 abstract class ByteConversionSinkBase extends ByteConversionSink { 44 abstract class ByteConversionSinkBase extends ByteConversionSink {
46
47 void add(List<int> chunk); 45 void add(List<int> chunk);
48 void close(); 46 void close();
49 47
50 void addSlice(List<int> chunk, int start, int end, bool isLast) { 48 void addSlice(List<int> chunk, int start, int end, bool isLast) {
51 add(chunk.sublist(start, end)); 49 add(chunk.sublist(start, end));
52 if (isLast) close(); 50 if (isLast) close();
53 } 51 }
54 } 52 }
55 53
56 /** 54 /**
57 * This class adapts a simple [Sink] to a [ByteConversionSink]. 55 * This class adapts a simple [Sink] to a [ByteConversionSink].
58 * 56 *
59 * All additional methods of the [ByteConversionSink] (compared to the 57 * All additional methods of the [ByteConversionSink] (compared to the
60 * ChunkedConversionSink) are redirected to the `add` method. 58 * ChunkedConversionSink) are redirected to the `add` method.
61 */ 59 */
62 class _ByteAdapterSink extends ByteConversionSinkBase { 60 class _ByteAdapterSink extends ByteConversionSinkBase {
63 final Sink<List<int>> _sink; 61 final Sink<List<int>> _sink;
64 62
65 _ByteAdapterSink(this._sink); 63 _ByteAdapterSink(this._sink);
66 64
67 void add(List<int> chunk) { _sink.add(chunk); } 65 void add(List<int> chunk) {
68 void close() { _sink.close(); } 66 _sink.add(chunk);
67 }
68
69 void close() {
70 _sink.close();
71 }
69 } 72 }
70 73
71 /** 74 /**
72 * This class accumulates all chunks into one list of bytes 75 * This class accumulates all chunks into one list of bytes
73 * and invokes a callback when the sink is closed. 76 * and invokes a callback when the sink is closed.
74 * 77 *
75 * This class can be used to terminate a chunked conversion. 78 * This class can be used to terminate a chunked conversion.
76 */ 79 */
77 class _ByteCallbackSink extends ByteConversionSinkBase { 80 class _ByteCallbackSink extends ByteConversionSinkBase {
78 static const _INITIAL_BUFFER_SIZE = 1024; 81 static const _INITIAL_BUFFER_SIZE = 1024;
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107 v |= v >> 8; 110 v |= v >> 8;
108 v |= v >> 16; 111 v |= v >> 16;
109 v++; 112 v++;
110 return v; 113 return v;
111 } 114 }
112 115
113 void close() { 116 void close() {
114 _callback(_buffer.sublist(0, _bufferIndex)); 117 _callback(_buffer.sublist(0, _bufferIndex));
115 } 118 }
116 } 119 }
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