| // Protocol Buffers - Google's data interchange format | |
| // Copyright 2008 Google Inc. All rights reserved. | |
| // | |
| // Use of this source code is governed by a BSD-style | |
| // license that can be found in the LICENSE file or at | |
| // https://developers.google.com/open-source/licenses/bsd | |
| // Author: seongkim@google.com (Seong Beom Kim) | |
| // Based on original Protocol Buffers design by | |
| // Sanjay Ghemawat, Jeff Dean, and others. | |
| namespace google { | |
| namespace protobuf { | |
| namespace compiler { | |
| namespace cpp { | |
| // Rearranges the fields of a message to minimize padding. | |
| // Fields are grouped by the type and the size. | |
| // For example, grouping four boolean fields and one int32 | |
| // field results in zero padding overhead. See OptimizeLayout's | |
| // comment for details. | |
| class PaddingOptimizer : public MessageLayoutHelper { | |
| public: | |
| PaddingOptimizer() {} | |
| ~PaddingOptimizer() override {} | |
| void OptimizeLayout(std::vector<const FieldDescriptor*>* fields, | |
| const Options& options, | |
| MessageSCCAnalyzer* scc_analyzer) override; | |
| }; | |
| } // namespace cpp | |
| } // namespace compiler | |
| } // namespace protobuf | |
| } // namespace google | |