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66 lines
2.7 KiB
C
66 lines
2.7 KiB
C
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// Protocol Buffers - Google's data interchange format
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// Copyright 2008 Google Inc. All rights reserved.
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// https://developers.google.com/protocol-buffers/
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// Author: seongkim@google.com (Seong Beom Kim)
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// Based on original Protocol Buffers design by
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// Sanjay Ghemawat, Jeff Dean, and others.
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#ifndef GOOGLE_PROTOBUF_COMPILER_CPP_PADDING_OPTIMIZER_H__
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#define GOOGLE_PROTOBUF_COMPILER_CPP_PADDING_OPTIMIZER_H__
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#include <thirdparty/protobuf/compiler/cpp/cpp_message_layout_helper.h>
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namespace google {
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namespace protobuf {
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namespace compiler {
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namespace cpp {
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// Rearranges the fields of a message to minimize padding.
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// Fields are grouped by the type and the size.
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// For example, grouping four boolean fields and one int32
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// field results in zero padding overhead. See OptimizeLayout's
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// comment for details.
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class PaddingOptimizer : public MessageLayoutHelper {
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public:
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PaddingOptimizer() {}
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~PaddingOptimizer() override {}
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void OptimizeLayout(std::vector<const FieldDescriptor*>* fields,
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const Options& options,
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MessageSCCAnalyzer* scc_analyzer) override;
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};
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} // namespace cpp
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} // namespace compiler
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} // namespace protobuf
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} // namespace google
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#endif // GOOGLE_PROTOBUF_COMPILER_CPP_PADDING_OPTIMIZER_H__
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