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82 lines
2.4 KiB
82 lines
2.4 KiB
/*
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* Copyright(C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0(the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http: // www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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*distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "VtsProfilingUtil.h"
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#include <stdint.h>
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#include "google/protobuf/io/coded_stream.h"
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namespace android {
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namespace vts {
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bool writeOneDelimited(const google::protobuf::MessageLite& message,
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google::protobuf::io::ZeroCopyOutputStream* out) {
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// We create a new coded stream for each message. This is fast.
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google::protobuf::io::CodedOutputStream output(out);
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// Write the size.
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const int size = message.ByteSize();
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output.WriteVarint32(size);
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uint8_t* buffer = output.GetDirectBufferForNBytesAndAdvance(size);
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if (buffer) {
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// Optimization: The message fits in one buffer, so use the faster
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// direct-to-array serialization path.
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message.SerializeWithCachedSizesToArray(buffer);
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} else {
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// Slightly-slower path when the message is multiple buffers.
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message.SerializeWithCachedSizes(&output);
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if (output.HadError()) {
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return false;
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}
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}
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return true;
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}
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bool readOneDelimited(google::protobuf::MessageLite* message,
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google::protobuf::io::ZeroCopyInputStream* in) {
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// We create a new coded stream for each message. This is fast,
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// and it makes sure the 64MB total size limit is imposed per-message rather
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// than on the whole stream (See the CodedInputStream interface for more
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// info on this limit).
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google::protobuf::io::CodedInputStream input(in);
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// Read the size.
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uint32_t size;
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if (!input.ReadVarint32(&size)) {
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return false;
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}
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// Tell the stream not to read beyond that size.
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const auto limit = input.PushLimit(size);
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// Parse the message.
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if (!message->MergeFromCodedStream(&input)) {
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return false;
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}
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if (!input.ConsumedEntireMessage()) {
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return false;
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}
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// Release the limit.
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input.PopLimit(limit);
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return true;
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}
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} // namespace vts
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} // namespace android
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