| // Copyright 2010 The Chromium Authors |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| // Implementation of the byte-level differential compression used internally by |
| // Courgette. |
| |
| #include "courgette/simple_delta.h" |
| |
| #include "base/logging.h" |
| |
| #include "courgette/third_party/bsdiff/bsdiff.h" |
| |
| namespace courgette { |
| |
| namespace { |
| |
| Status BSDiffStatusToStatus(bsdiff::BSDiffStatus status) { |
| switch (status) { |
| case bsdiff::OK: return C_OK; |
| case bsdiff::CRC_ERROR: return C_BINARY_DIFF_CRC_ERROR; |
| default: return C_GENERAL_ERROR; |
| } |
| } |
| |
| } |
| |
| Status ApplySimpleDelta(SourceStream* old, SourceStream* delta, |
| SinkStream* target) { |
| return BSDiffStatusToStatus(bsdiff::ApplyBinaryPatch(old, delta, target)); |
| } |
| |
| Status GenerateSimpleDelta(SourceStream* old, SourceStream* target, |
| SinkStream* delta) { |
| VLOG(1) << "GenerateSimpleDelta " << old->Remaining() |
| << " " << target->Remaining(); |
| return BSDiffStatusToStatus(bsdiff::CreateBinaryPatch(old, target, delta)); |
| } |
| |
| } // namespace courgette |