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/*
* Copyright (C) 2017 The Android Open Source Project
*
* 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 ANDROID_UTIL_PROTOOUTPUT_STREAM_H
#define ANDROID_UTIL_PROTOOUTPUT_STREAM_H
#include <android/util/EncodedBuffer.h>
#include <stdint.h>
#include <string>
namespace android {
namespace util {
/**
* Class to write to a protobuf stream.
*
* Each write method takes an ID code from the protoc generated classes
* and the value to write. To make a nested object, call start
* and then end when you are done.
*
* See the java version implementation (ProtoOutputStream.java) for more infos.
*/
class ProtoOutputStream
{
public:
ProtoOutputStream();
~ProtoOutputStream();
/**
* Write APIs for dumping protobuf data. Returns true if the write succeeds.
*/
bool write(uint64_t fieldId, double val);
bool write(uint64_t fieldId, float val);
bool write(uint64_t fieldId, int val);
bool write(uint64_t fieldId, long long val);
bool write(uint64_t fieldId, bool val);
bool write(uint64_t fieldId, std::string val);
bool write(uint64_t fieldId, const char* val, size_t size);
/**
* Starts a sub-message write session.
* Returns a token of this write session.
* Must call end(token) when finish write this sub-message.
*/
long long start(uint64_t fieldId);
void end(long long token);
/**
* Flushes the protobuf data out to given fd.
*/
size_t size();
EncodedBuffer::iterator data();
bool flush(int fd);
// Please don't use the following functions to dump protos unless you are familiar with protobuf encoding.
void writeRawVarint(uint64_t varint);
void writeLengthDelimitedHeader(uint32_t id, size_t size);
void writeRawByte(uint8_t byte);
private:
EncodedBuffer mBuffer;
size_t mCopyBegin;
bool mCompact;
int mDepth;
int mObjectId;
long long mExpectedObjectToken;
inline void writeDoubleImpl(uint32_t id, double val);
inline void writeFloatImpl(uint32_t id, float val);
inline void writeInt64Impl(uint32_t id, long long val);
inline void writeInt32Impl(uint32_t id, int val);
inline void writeUint64Impl(uint32_t id, uint64_t val);
inline void writeUint32Impl(uint32_t id, uint32_t val);
inline void writeFixed64Impl(uint32_t id, uint64_t val);
inline void writeFixed32Impl(uint32_t id, uint32_t val);
inline void writeSFixed64Impl(uint32_t id, long long val);
inline void writeSFixed32Impl(uint32_t id, int val);
inline void writeZigzagInt64Impl(uint32_t id, long long val);
inline void writeZigzagInt32Impl(uint32_t id, int val);
inline void writeEnumImpl(uint32_t id, int val);
inline void writeBoolImpl(uint32_t id, bool val);
inline void writeUtf8StringImpl(uint32_t id, const char* val, size_t size);
inline void writeMessageBytesImpl(uint32_t id, const char* val, size_t size);
bool compact();
size_t editEncodedSize(size_t rawSize);
bool compactSize(size_t rawSize);
};
}
}
#endif // ANDROID_UTIL_PROTOOUTPUT_STREAM_H
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