| OLD | NEW |
| 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 import 'dart:typed_data' show Uint16List; | 5 import 'dart:typed_data' show Uint16List; |
| 6 | 6 |
| 7 @patch class StringBuffer { | 7 @patch |
| 8 class StringBuffer { |
| 8 static const int _BUFFER_SIZE = 64; | 9 static const int _BUFFER_SIZE = 64; |
| 9 static const int _PARTS_TO_COMPACT = 128; | 10 static const int _PARTS_TO_COMPACT = 128; |
| 10 static const int _PARTS_TO_COMPACT_SIZE_LIMIT = _PARTS_TO_COMPACT * 8; | 11 static const int _PARTS_TO_COMPACT_SIZE_LIMIT = _PARTS_TO_COMPACT * 8; |
| 11 | 12 |
| 12 /** | 13 /** |
| 13 * When strings are written to the string buffer, we add them to a | 14 * When strings are written to the string buffer, we add them to a |
| 14 * list of string parts. | 15 * list of string parts. |
| 15 */ | 16 */ |
| 16 List<String> _parts; | 17 List<String> _parts; |
| 17 | 18 |
| (...skipping 25 matching lines...) Expand all Loading... |
| 43 * Collects the approximate maximal magnitude of the code units added | 44 * Collects the approximate maximal magnitude of the code units added |
| 44 * to the buffer. | 45 * to the buffer. |
| 45 * | 46 * |
| 46 * The value of each added code unit is or'ed with this variable, so the | 47 * The value of each added code unit is or'ed with this variable, so the |
| 47 * most significant bit set in any code unit is also set in this value. | 48 * most significant bit set in any code unit is also set in this value. |
| 48 * If below 256, the string in the buffer is a Latin-1 string. | 49 * If below 256, the string in the buffer is a Latin-1 string. |
| 49 */ | 50 */ |
| 50 int _bufferCodeUnitMagnitude = 0; | 51 int _bufferCodeUnitMagnitude = 0; |
| 51 | 52 |
| 52 /// Creates the string buffer with an initial content. | 53 /// Creates the string buffer with an initial content. |
| 53 @patch StringBuffer([Object content = ""]) { | 54 @patch |
| 55 StringBuffer([Object content = ""]) { |
| 54 write(content); | 56 write(content); |
| 55 } | 57 } |
| 56 | 58 |
| 57 @patch int get length => _partsCodeUnits + _bufferPosition; | 59 @patch |
| 60 int get length => _partsCodeUnits + _bufferPosition; |
| 58 | 61 |
| 59 @patch void write(Object obj) { | 62 @patch |
| 63 void write(Object obj) { |
| 60 String str = '$obj'; | 64 String str = '$obj'; |
| 61 if (str.isEmpty) return; | 65 if (str.isEmpty) return; |
| 62 _consumeBuffer(); | 66 _consumeBuffer(); |
| 63 _addPart(str); | 67 _addPart(str); |
| 64 } | 68 } |
| 65 | 69 |
| 66 @patch void writeCharCode(int charCode) { | 70 @patch |
| 71 void writeCharCode(int charCode) { |
| 67 if (charCode <= 0xFFFF) { | 72 if (charCode <= 0xFFFF) { |
| 68 if (charCode < 0) { | 73 if (charCode < 0) { |
| 69 throw new RangeError.range(charCode, 0, 0x10FFFF); | 74 throw new RangeError.range(charCode, 0, 0x10FFFF); |
| 70 } | 75 } |
| 71 _ensureCapacity(1); | 76 _ensureCapacity(1); |
| 72 _buffer[_bufferPosition++] = charCode; | 77 _buffer[_bufferPosition++] = charCode; |
| 73 _bufferCodeUnitMagnitude |= charCode; | 78 _bufferCodeUnitMagnitude |= charCode; |
| 74 } else { | 79 } else { |
| 75 if (charCode > 0x10FFFF) { | 80 if (charCode > 0x10FFFF) { |
| 76 throw new RangeError.range(charCode, 0, 0x10FFFF); | 81 throw new RangeError.range(charCode, 0, 0x10FFFF); |
| 77 } | 82 } |
| 78 _ensureCapacity(2); | 83 _ensureCapacity(2); |
| 79 int bits = charCode - 0x10000; | 84 int bits = charCode - 0x10000; |
| 80 _buffer[_bufferPosition++] = 0xD800 | (bits >> 10); | 85 _buffer[_bufferPosition++] = 0xD800 | (bits >> 10); |
| 81 _buffer[_bufferPosition++] = 0xDC00 | (bits & 0x3FF); | 86 _buffer[_bufferPosition++] = 0xDC00 | (bits & 0x3FF); |
| 82 _bufferCodeUnitMagnitude |= 0xFFFF; | 87 _bufferCodeUnitMagnitude |= 0xFFFF; |
| 83 } | 88 } |
| 84 } | 89 } |
| 85 | 90 |
| 86 @patch void writeAll(Iterable objects, [String separator = ""]) { | 91 @patch |
| 92 void writeAll(Iterable objects, [String separator = ""]) { |
| 87 Iterator iterator = objects.iterator; | 93 Iterator iterator = objects.iterator; |
| 88 if (!iterator.moveNext()) return; | 94 if (!iterator.moveNext()) return; |
| 89 if (separator.isEmpty) { | 95 if (separator.isEmpty) { |
| 90 do { | 96 do { |
| 91 write(iterator.current); | 97 write(iterator.current); |
| 92 } while (iterator.moveNext()); | 98 } while (iterator.moveNext()); |
| 93 } else { | 99 } else { |
| 94 write(iterator.current); | 100 write(iterator.current); |
| 95 while (iterator.moveNext()) { | 101 while (iterator.moveNext()) { |
| 96 write(separator); | 102 write(separator); |
| 97 write(iterator.current); | 103 write(iterator.current); |
| 98 } | 104 } |
| 99 } | 105 } |
| 100 } | 106 } |
| 101 | 107 |
| 102 @patch void writeln([Object obj = ""]) { | 108 @patch |
| 109 void writeln([Object obj = ""]) { |
| 103 write(obj); | 110 write(obj); |
| 104 write("\n"); | 111 write("\n"); |
| 105 } | 112 } |
| 106 | 113 |
| 107 /** Makes the buffer empty. */ | 114 /** Makes the buffer empty. */ |
| 108 @patch void clear() { | 115 @patch |
| 116 void clear() { |
| 109 _parts = null; | 117 _parts = null; |
| 110 _partsCodeUnits = _bufferPosition = _bufferCodeUnitMagnitude = 0; | 118 _partsCodeUnits = _bufferPosition = _bufferCodeUnitMagnitude = 0; |
| 111 } | 119 } |
| 112 | 120 |
| 113 /** Returns the contents of buffer as a string. */ | 121 /** Returns the contents of buffer as a string. */ |
| 114 @patch String toString() { | 122 @patch |
| 123 String toString() { |
| 115 _consumeBuffer(); | 124 _consumeBuffer(); |
| 116 return (_partsCodeUnits == 0) ? | 125 return (_partsCodeUnits == 0) |
| 117 "" : | 126 ? "" |
| 118 _StringBase._concatRange(_parts, 0, _parts.length); | 127 : _StringBase._concatRange(_parts, 0, _parts.length); |
| 119 } | 128 } |
| 120 | 129 |
| 121 /** Ensures that the buffer has enough capacity to add n code units. */ | 130 /** Ensures that the buffer has enough capacity to add n code units. */ |
| 122 void _ensureCapacity(int n) { | 131 void _ensureCapacity(int n) { |
| 123 if (_buffer == null) { | 132 if (_buffer == null) { |
| 124 _buffer = new Uint16List(_BUFFER_SIZE); | 133 _buffer = new Uint16List(_BUFFER_SIZE); |
| 125 } else if (_bufferPosition + n > _buffer.length) { | 134 } else if (_bufferPosition + n > _buffer.length) { |
| 126 _consumeBuffer(); | 135 _consumeBuffer(); |
| 127 } | 136 } |
| 128 } | 137 } |
| (...skipping 33 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
| 162 } | 171 } |
| 163 | 172 |
| 164 /** | 173 /** |
| 165 * Compacts the last N parts if their average size allows us to save a | 174 * Compacts the last N parts if their average size allows us to save a |
| 166 * lot of memory by turning them all into a single part. | 175 * lot of memory by turning them all into a single part. |
| 167 */ | 176 */ |
| 168 void _compact() { | 177 void _compact() { |
| 169 if (_partsCodeUnitsSinceCompaction < _PARTS_TO_COMPACT_SIZE_LIMIT) { | 178 if (_partsCodeUnitsSinceCompaction < _PARTS_TO_COMPACT_SIZE_LIMIT) { |
| 170 String compacted = _StringBase._concatRange( | 179 String compacted = _StringBase._concatRange( |
| 171 _parts, | 180 _parts, |
| 172 _partsCompactionIndex, // Start | 181 _partsCompactionIndex, // Start |
| 173 _partsCompactionIndex + _PARTS_TO_COMPACT // End | 182 _partsCompactionIndex + _PARTS_TO_COMPACT // End |
| 174 ); | 183 ); |
| 175 _parts.length = _parts.length - _PARTS_TO_COMPACT; | 184 _parts.length = _parts.length - _PARTS_TO_COMPACT; |
| 176 _parts.add(compacted); | 185 _parts.add(compacted); |
| 177 } | 186 } |
| 178 _partsCodeUnitsSinceCompaction = 0; | 187 _partsCodeUnitsSinceCompaction = 0; |
| 179 _partsCompactionIndex = _parts.length; | 188 _partsCompactionIndex = _parts.length; |
| 180 } | 189 } |
| 181 | 190 |
| 182 /** | 191 /** |
| 183 * Create a [String] from the UFT-16 code units in buffer. | 192 * Create a [String] from the UFT-16 code units in buffer. |
| 184 */ | 193 */ |
| 185 static String _create(Uint16List buffer, int length, bool isLatin1) | 194 static String _create(Uint16List buffer, int length, bool isLatin1) |
| 186 native "StringBuffer_createStringFromUint16Array"; | 195 native "StringBuffer_createStringFromUint16Array"; |
| 187 } | 196 } |
| OLD | NEW |