104 lines
4.3 KiB
C++
104 lines
4.3 KiB
C++
// 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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#ifndef GOOGLE_PROTOBUF_COMPILER_JAVA_MESSAGE_SERIALIZATION_H__
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#define GOOGLE_PROTOBUF_COMPILER_JAVA_MESSAGE_SERIALIZATION_H__
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#include <algorithm>
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#include <cstddef>
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#include <vector>
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#include "google/protobuf/compiler/java/field.h"
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#include "google/protobuf/compiler/java/helpers.h"
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#include "google/protobuf/descriptor.h"
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#include "google/protobuf/io/printer.h"
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namespace google {
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namespace protobuf {
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namespace compiler {
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namespace java {
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// Generates code to serialize a single extension range.
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void GenerateSerializeExtensionRange(io::Printer* printer,
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const Descriptor::ExtensionRange* range);
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// Generates code to serialize all fields and extension ranges for the specified
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// message descriptor, sorting serialization calls in increasing order by field
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// number.
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//
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// Templatized to support different field generator implementations.
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template <typename FieldGenerator>
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void GenerateSerializeFieldsAndExtensions(
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io::Printer* printer,
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const FieldGeneratorMap<FieldGenerator>& field_generators,
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const Descriptor* descriptor, const FieldDescriptor** sorted_fields) {
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std::vector<const Descriptor::ExtensionRange*> sorted_extensions;
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sorted_extensions.reserve(descriptor->extension_range_count());
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for (int i = 0; i < descriptor->extension_range_count(); ++i) {
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sorted_extensions.push_back(descriptor->extension_range(i));
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}
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std::sort(sorted_extensions.begin(), sorted_extensions.end(),
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ExtensionRangeOrdering());
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std::size_t range_idx = 0;
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// Merge the fields and the extension ranges, both sorted by field number.
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for (int i = 0; i < descriptor->field_count(); ++i) {
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const FieldDescriptor* field = sorted_fields[i];
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// Collapse all extension ranges up until the next field. This leads to
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// shorter and more efficient codegen for messages containing a large
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// number of extension ranges without fields in between them.
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const Descriptor::ExtensionRange* range = nullptr;
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while (range_idx < sorted_extensions.size() &&
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sorted_extensions[range_idx]->end_number() <= field->number()) {
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range = sorted_extensions[range_idx++];
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}
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if (range != nullptr) {
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GenerateSerializeExtensionRange(printer, range);
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}
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field_generators.get(field).GenerateSerializationCode(printer);
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}
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// After serializing all fields, serialize any remaining extensions via a
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// single writeUntil call.
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if (range_idx < sorted_extensions.size()) {
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GenerateSerializeExtensionRange(printer, sorted_extensions.back());
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}
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}
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} // namespace java
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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_JAVA_MESSAGE_SERIALIZATION_H__
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