1 files changed, 41 insertions, 0 deletions
diff --git a/courgette/simple_delta.cc b/courgette/simple_delta.cc
new file mode 100644
index 0000000..71038fd
--- /dev/null
+++ b/courgette/simple_delta.cc
@@ -0,0 +1,41 @@
+// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// 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/basictypes.h"
+#include "base/logging.h"
+
+#include "courgette/third_party/bsdiff.h"
+
+namespace courgette {
+
+namespace {
+
+Status BSDiffStatusToStatus(BSDiffStatus status) {
+  switch (status) {
+    case OK: return C_OK;
+    case CRC_ERROR: return C_BINARY_DIFF_CRC_ERROR;
+    default: return C_GENERAL_ERROR;
+  }
+}
+
+}
+
+Status ApplySimpleDelta(SourceStream* old, SourceStream* delta,
+                        SinkStream* target) {
+  return BSDiffStatusToStatus(ApplyBinaryPatch(old, delta, target));
+}
+
+Status GenerateSimpleDelta(SourceStream* old, SourceStream* target,
+                           SinkStream* delta) {
+  LOG(INFO) << "GenerateSimpleDelta "
+            << old->Remaining() << " " << target->Remaining();
+  return BSDiffStatusToStatus(CreateBinaryPatch(old, target, delta));
+}
+
+}  // namespace courgette