write-stream.h

Go to the documentation of this file.

// Copyright 2012 Cloudera Inc.
//
// 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 IMPALA_EXEC_WRITE_STREAM_H
#define IMPALA_EXEC_WRITE_STREAM_H

#include <boost/cstdint.hpp>

#include "common/status.h"

namespace impala {

class WriteStream {
 public:

  WriteStream() : len_(0) { };

  inline int WriteBytes(int length, const uint8_t* buf);
  inline int WriteBytes(int length, const char* buf);

  inline int WriteVInt(int32_t val);
  inline int WriteInt(uint32_t val);
  inline int WriteByte(uint8_t val);
  inline int WriteByte(char val);
  inline int WriteVLong(int64_t val);
  inline int WriteBoolean(bool val);
  inline int WriteZInt(int32_t val);
  inline int WriteZLong(int64_t val);
  inline int WriteText(int32_t len, const uint8_t* buf);
  inline int WriteEmptyText();

  inline void Clear();
  inline size_t Size();

  inline std::string String();

 private:
  std::stringstream buffer_;
  uint64_t len_;
};

} // namespace impala
#endif