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Dart - make ascii optimization optional in StringReader, same as in writeString() (#6758)

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This commit is contained in:
Ivan Dlugos
2021-07-29 19:39:03 +02:00
committed by GitHub
parent c871df7702
commit 5235133f32
2 changed files with 7 additions and 6 deletions
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11
dart/lib/flat_buffers.dart
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@@ -1033,20 +1033,21 @@ abstract class Reader<T> {
/// The reader of string values. /// The reader of string values.
class StringReader extends Reader<String> { class StringReader extends Reader<String> {
const StringReader() : super(); final bool asciiOptimization;
const StringReader({this.asciiOptimization = false}) : super();
@override @override
@pragma('vm:prefer-inline') @pragma('vm:prefer-inline')
int get size => 4; int get size => _sizeofUint32;
@override @override
@pragma('vm:prefer-inline') @pragma('vm:prefer-inline')
String read(BufferContext bc, int offset) { String read(BufferContext bc, int offset) {
int strOffset = bc.derefObject(offset); int strOffset = bc.derefObject(offset);
int length = bc._getUint32(strOffset); int length = bc._getUint32(strOffset);
Uint8List bytes = bc._asUint8List(strOffset + 4, length); Uint8List bytes = bc._asUint8List(strOffset + _sizeofUint32, length);
if (_isLatin(bytes)) { if (asciiOptimization && _isLatin(bytes)) {
return new String.fromCharCodes(bytes); return String.fromCharCodes(bytes);
} }
return utf8.decode(bytes); return utf8.decode(bytes);
} }

2
dart/test/flat_buffers_test.dart
View File

@@ -379,7 +379,7 @@ class BuilderTest {
.vTableGetNullable(buf, objectOffset, indexToField(0)), .vTableGetNullable(buf, objectOffset, indexToField(0)),
latinString); latinString);
expect( expect(
const StringReader() const StringReader(asciiOptimization: true)
.vTableGetNullable(buf, objectOffset, indexToField(1)), .vTableGetNullable(buf, objectOffset, indexToField(1)),
unicodeString); unicodeString);
} }