src/kudu/util/protobuf_util.h

// Copyright 2012 Cloudera, Inc.
//
// 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 KUDU_UTIL_PROTOBUF_UTIL_H
#define KUDU_UTIL_PROTOBUF_UTIL_H

#include <google/protobuf/message_lite.h>

namespace kudu {

bool AppendPBToString(const google::protobuf::MessageLite &msg, faststring *output) {
  int old_size = output->size();
  int byte_size = msg.ByteSize();
  output->resize(old_size + byte_size);
  uint8* start = reinterpret_cast<uint8*>(output->data() + old_size);
  uint8* end = msg.SerializeWithCachedSizesToArray(start);
  CHECK(end - start == byte_size)
    << "Error in serialization. byte_size=" << byte_size
    << " new ByteSize()=" << msg.ByteSize()
    << " end-start=" << (end-start);
  return true;
}

} // namespace kudu

#endif