Add lz4diff patch routines
Test: th
Bug: 206729162
Change-Id: I76a404e233e7683812bac65520c6c065e9a1ffe2
diff --git a/lz4diff/lz4patch.h b/lz4diff/lz4patch.h
new file mode 100644
index 0000000..5610891
--- /dev/null
+++ b/lz4diff/lz4patch.h
@@ -0,0 +1,50 @@
+//
+// Copyright (C) 2021 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+#ifndef UPDATE_ENGINE_LZ4DIFF_LZ4PATCH_H_
+#define UPDATE_ENGINE_LZ4DIFF_LZ4PATCH_H_
+
+#include "lz4diff_format.h"
+
+namespace chromeos_update_engine {
+bool Lz4Patch(std::string_view src_data,
+ std::string_view patch_data,
+ Blob* output);
+
+std::ostream& operator<<(std::ostream& out, const Lz4diffHeader&);
+
+template <typename T>
+std::ostream& operator<<(std::ostream& out,
+ const google::protobuf::RepeatedPtrField<T>& arr) {
+ if (arr.empty()) {
+ out << "[]";
+ return out;
+ }
+ out << "[";
+ auto begin = arr.begin();
+ out << *begin;
+ ++begin;
+ for (; begin != arr.end(); ++begin) {
+ out << ", " << *begin;
+ }
+ out << "]";
+
+ return out;
+}
+
+} // namespace chromeos_update_engine
+
+#endif