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| (Empty) |
| 1 part of dart.convert; | |
| 2 const Latin1Codec LATIN1 = const Latin1Codec(); | |
| 3 const int _LATIN1_MASK = 0xFF; | |
| 4 class Latin1Codec extends Encoding {final bool _allowInvalid; | |
| 5 const Latin1Codec({ | |
| 6 bool allowInvalid : false} | |
| 7 ) : _allowInvalid = allowInvalid; | |
| 8 String get name => "iso-8859-1"; | |
| 9 String decode(List<int> bytes, { | |
| 10 bool allowInvalid} | |
| 11 ) { | |
| 12 if (allowInvalid == null) allowInvalid = _allowInvalid; | |
| 13 if (allowInvalid) { | |
| 14 return const Latin1Decoder(allowInvalid: true).convert(bytes); | |
| 15 } | |
| 16 else { | |
| 17 return const Latin1Decoder(allowInvalid: false).convert(bytes); | |
| 18 } | |
| 19 } | |
| 20 Converter<String, List<int>> get encoder => const Latin1Encoder(); | |
| 21 Converter<List<int>, String> get decoder => _allowInvalid ? const Latin1Decoder
(allowInvalid: true) : const Latin1Decoder(allowInvalid: false); | |
| 22 } | |
| 23 class Latin1Encoder extends _UnicodeSubsetEncoder {const Latin1Encoder() : supe
r(_LATIN1_MASK); | |
| 24 } | |
| 25 class Latin1Decoder extends _UnicodeSubsetDecoder {const Latin1Decoder({ | |
| 26 bool allowInvalid : false} | |
| 27 ) : super(allowInvalid, _LATIN1_MASK); | |
| 28 ByteConversionSink startChunkedConversion(Sink<String> sink) { | |
| 29 StringConversionSink stringSink; | |
| 30 if (sink is StringConversionSink) { | |
| 31 stringSink = sink; | |
| 32 } | |
| 33 else { | |
| 34 stringSink = new StringConversionSink.from(sink); | |
| 35 } | |
| 36 if (!_allowInvalid) return new _Latin1DecoderSink(stringSink); | |
| 37 return new _Latin1AllowInvalidDecoderSink(stringSink); | |
| 38 } | |
| 39 } | |
| 40 class _Latin1DecoderSink extends ByteConversionSinkBase {StringConversionSink _
sink; | |
| 41 _Latin1DecoderSink(this._sink); | |
| 42 void close() { | |
| 43 _sink.close(); | |
| 44 } | |
| 45 void add(List<int> source) { | |
| 46 addSlice(source, 0, source.length, false); | |
| 47 } | |
| 48 void _addSliceToSink(List<int> source, int start, int end, bool isLast) { | |
| 49 _sink.add(new String.fromCharCodes(source, start, end)); | |
| 50 if (isLast) close(); | |
| 51 } | |
| 52 void addSlice(List<int> source, int start, int end, bool isLast) { | |
| 53 RangeError.checkValidRange(start, end, source.length); | |
| 54 for (int i = start; i < end; i++) { | |
| 55 int char = source[i]; | |
| 56 if (char > _LATIN1_MASK || char < 0) { | |
| 57 throw new FormatException("Source contains non-Latin-1 characters."); | |
| 58 } | |
| 59 } | |
| 60 if (start < end) { | |
| 61 _addSliceToSink(source, start, end, isLast); | |
| 62 } | |
| 63 if (isLast) { | |
| 64 close(); | |
| 65 } | |
| 66 } | |
| 67 } | |
| 68 class _Latin1AllowInvalidDecoderSink extends _Latin1DecoderSink {_Latin1AllowIn
validDecoderSink(StringConversionSink sink) : super(sink); | |
| 69 void addSlice(List<int> source, int start, int end, bool isLast) { | |
| 70 RangeError.checkValidRange(start, end, source.length); | |
| 71 for (int i = start; i < end; i++) { | |
| 72 int char = source[i]; | |
| 73 if (char > _LATIN1_MASK || char < 0) { | |
| 74 if (i > start) _addSliceToSink(source, start, i, false); | |
| 75 _addSliceToSink(const <int> [0xFFFD], 0, 1, false); | |
| 76 start = i + 1; | |
| 77 } | |
| 78 } | |
| 79 if (start < end) { | |
| 80 _addSliceToSink(source, start, end, isLast); | |
| 81 } | |
| 82 if (isLast) { | |
| 83 close(); | |
| 84 } | |
| 85 } | |
| 86 } | |
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