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1 // Copyright (c) 2015, the Dart project authors. Please see the AUTHORS file | |
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. | |
4 | |
5 library crypto.digest_sink; | |
6 | |
7 import 'digest.dart'; | |
8 | |
9 /// A sink used to get a digest value out of [Hash.startChunkedConversion]. | |
10 class DigestSink extends Sink<Digest> { | |
11 /// The value added to the sink, if any. | |
12 Digest get value { | |
13 assert(_value != null); | |
14 return _value; | |
15 } | |
16 Digest _value; | |
17 | |
18 void add(Digest value) { | |
Bob Nystrom
2015/09/22 17:47:31
Document that this can only be called once.
nweiz
2015/09/22 21:37:33
Done.
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19 assert(_value == null); | |
20 _value = value; | |
21 } | |
22 | |
23 void close() { | |
24 assert(_value != null); | |
25 } | |
26 } | |
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