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1 // Copyright (c) 2009 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 // Implementation of the byte-level differential compression used internally by | |
6 // Courgette. | |
7 | |
8 #include "third_party/courgette/simple_delta.h" | |
9 | |
10 #include "base/basictypes.h" | |
11 #include "base/logging.h" | |
12 | |
13 #include "third_party/courgette/bsdiff.h" | |
14 | |
15 namespace courgette { | |
16 | |
17 namespace { | |
18 | |
19 Status BSDiffStatusToStatus(BSDiffStatus status) { | |
20 switch (status) { | |
21 case OK: return C_OK; | |
22 case CRC_ERROR: return C_BINARY_DIFF_CRC_ERROR; | |
23 default: return C_GENERAL_ERROR; | |
24 } | |
25 } | |
26 | |
27 } | |
28 | |
29 Status ApplySimpleDelta(SourceStream* old, SourceStream* delta, | |
30 SinkStream* target) { | |
31 return BSDiffStatusToStatus(ApplyBinaryPatch(old, delta, target)); | |
32 } | |
33 | |
34 Status GenerateSimpleDelta(SourceStream* old, SourceStream* target, | |
35 SinkStream* delta) { | |
36 LOG(INFO) << "GenerateSimpleDelta " | |
37 << old->Remaining() << " " << target->Remaining(); | |
38 return BSDiffStatusToStatus(CreateBinaryPatch(old, target, delta)); | |
39 } | |
40 | |
41 } // namespace courgette | |
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