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#pragma once
#include <google/protobuf/stubs/port.h>
#include <google/protobuf/io/coded_stream.h>
#include <util/stream/output.h>
#include <util/generic/buffer.h>
#include <google/protobuf/io/zero_copy_stream_impl.h>
/// this file is Yandex extensions to protobuf
namespace google {
namespace protobuf {
class Message;
namespace internal {
struct TAsBinary {
const Message& Message_;
friend IOutputStream& operator <<(IOutputStream& output, const TAsBinary& wrappedMessage);
};
struct TAsStreamSeq {
const Message& Message_;
friend IOutputStream& operator <<(IOutputStream& output, const TAsStreamSeq& wrappedMessage);
};
} // namespace internal
namespace io {
/// Parse*Seq methods read message size from stream to find a message boundary
/// there is not parse from IInputStream, because it is not push-backable
bool ParseFromCodedStreamSeq(Message* msg, io::CodedInputStream* input);
bool ParseFromZeroCopyStreamSeq(Message* msg, io::ZeroCopyInputStream* input);
/// Serialize*Seq methods write message size as varint before writing a message
/// there is no serialize to IOutputStream, because it is not push-backable
bool SerializePartialToCodedStreamSeq(const Message* msg, io::CodedOutputStream* output);
bool SerializeToCodedStreamSeq(const Message* msg, io::CodedOutputStream* output);
bool SerializeToZeroCopyStreamSeq(const Message* msg, io::ZeroCopyOutputStream* output);
class TErrorState {
public:
TErrorState()
: HasError_(false)
{
}
bool HasError() const {
return HasError_;
}
void SetError() {
HasError_ = true;
}
private:
bool HasError_;
};
class TInputStreamProxy: public io::CopyingInputStream, public TErrorState {
public:
inline TInputStreamProxy(IInputStream* slave)
: mSlave(slave)
{
}
virtual int Read(void* buffer, int size);
private:
IInputStream* mSlave;
};
class TOutputStreamProxy: public io::CopyingOutputStream, public TErrorState {
public:
inline TOutputStreamProxy(IOutputStream* slave)
: mSlave(slave)
{
}
virtual bool Write(const void* buffer, int size);
private:
IOutputStream* mSlave;
};
class TCopyingInputStreamAdaptor: public TInputStreamProxy, public CopyingInputStreamAdaptor {
public:
TCopyingInputStreamAdaptor(IInputStream* inputStream)
: TInputStreamProxy(inputStream)
, CopyingInputStreamAdaptor(this)
{ }
};
class TCopyingOutputStreamAdaptor: public TOutputStreamProxy, public CopyingOutputStreamAdaptor {
public:
TCopyingOutputStreamAdaptor(IOutputStream* outputStream)
: TOutputStreamProxy(outputStream)
, CopyingOutputStreamAdaptor(this)
{ }
};
class TProtoSerializer {
public:
static void Save(IOutputStream* output, const Message& msg);
static void Load(IInputStream* input, Message& msg);
static void MergeFrom(IInputStream* input, Message& msg);
// similar interface for protobuf coded streams
static inline bool Save(CodedOutputStream* output, const Message& msg) {
return SerializeToCodedStreamSeq(&msg, output);
}
static inline bool Load(CodedInputStream* input, Message& msg) {
return ParseFromCodedStreamSeq(&msg, input);
}
};
/**
* Special separate simple reader of protobuf files from arcadic streams
* with static one time allocated buffer.
*
* Data can be prepared with TProtoSerializer::Save, format is the same.
*
*/
class TProtoReader {
public:
TProtoReader(IInputStream* input, const size_t bufferSize = DefaultBufferSize);
/**
* Reads protobuf message
*
* @param msg binary compatible protobuf message
* @returns true if read is ok
* false if stream is exhausted
* yexception if input data is corrupted
*/
bool Load(Message& msg);
private:
IInputStream* IStream;
TBuffer Buffer;
static const size_t DefaultBufferSize = (1 << 16);
};
} // namespace io
} // namespace protobuf
} // namespace google
// arcadia-style serialization
inline void Save(IOutputStream* output, const google::protobuf::Message& msg) {
google::protobuf::io::TProtoSerializer::Save(output, msg);
}
inline void Load(IInputStream* input, google::protobuf::Message& msg) {
google::protobuf::io::TProtoSerializer::Load(input, msg);
}
// A mix of ShortDebugString and Utf8DebugString
TProtoStringType ShortUtf8DebugString(const google::protobuf::Message& msg);
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