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| 1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 // Implementation of the byte-level differential compression used internally by | 5 // Implementation of the byte-level differential compression used internally by |
| 6 // Courgette. | 6 // Courgette. |
| 7 | 7 |
| 8 #include "courgette/simple_delta.h" | 8 #include "courgette/simple_delta.h" |
| 9 | 9 |
| 10 #include "base/logging.h" | 10 #include "base/logging.h" |
| 11 | 11 |
| 12 #include "courgette/third_party/bsdiff.h" | 12 #include "courgette/third_party/bsdiff/bsdiff.h" |
| 13 | 13 |
| 14 namespace courgette { | 14 namespace courgette { |
| 15 | 15 |
| 16 namespace { | 16 namespace { |
| 17 | 17 |
| 18 Status BSDiffStatusToStatus(BSDiffStatus status) { | 18 Status BSDiffStatusToStatus(BSDiffStatus status) { |
| 19 switch (status) { | 19 switch (status) { |
| 20 case OK: return C_OK; | 20 case OK: return C_OK; |
| 21 case CRC_ERROR: return C_BINARY_DIFF_CRC_ERROR; | 21 case CRC_ERROR: return C_BINARY_DIFF_CRC_ERROR; |
| 22 default: return C_GENERAL_ERROR; | 22 default: return C_GENERAL_ERROR; |
| 23 } | 23 } |
| 24 } | 24 } |
| 25 | 25 |
| 26 } | 26 } |
| 27 | 27 |
| 28 Status ApplySimpleDelta(SourceStream* old, SourceStream* delta, | 28 Status ApplySimpleDelta(SourceStream* old, SourceStream* delta, |
| 29 SinkStream* target) { | 29 SinkStream* target) { |
| 30 return BSDiffStatusToStatus(ApplyBinaryPatch(old, delta, target)); | 30 return BSDiffStatusToStatus(ApplyBinaryPatch(old, delta, target)); |
| 31 } | 31 } |
| 32 | 32 |
| 33 Status GenerateSimpleDelta(SourceStream* old, SourceStream* target, | 33 Status GenerateSimpleDelta(SourceStream* old, SourceStream* target, |
| 34 SinkStream* delta) { | 34 SinkStream* delta) { |
| 35 VLOG(1) << "GenerateSimpleDelta " << old->Remaining() | 35 VLOG(1) << "GenerateSimpleDelta " << old->Remaining() |
| 36 << " " << target->Remaining(); | 36 << " " << target->Remaining(); |
| 37 return BSDiffStatusToStatus(CreateBinaryPatch(old, target, delta)); | 37 return BSDiffStatusToStatus(CreateBinaryPatch(old, target, delta)); |
| 38 } | 38 } |
| 39 | 39 |
| 40 } // namespace courgette | 40 } // namespace courgette |
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