rle.h

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// MIT License
// 
// Copyright (c) 2022 ZooK
// 
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
// 
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
 
#pragma once
 
#include <memory>
#include <b8/type.h>
#include <pipe.h>
 
namespace Rle {
 
class CRleEncoder {
  std::shared_ptr< Pipe::CPipe > _pipe_in  = std::make_shared< Pipe::CNullPipe >();
  std::shared_ptr< Pipe::CPipe > _pipe_out = std::make_shared< Pipe::CNullPipe >();
public:
  void SetIn(std::shared_ptr< Pipe::CPipe > pipe_in_);
 
  void SetOut(std::shared_ptr< Pipe::CPipe > pipe_out_);
 
  enum EncodeResult {
    ENCODE_OK,                
    ENCODE_ERR_INVALID_PIPE,  
  };
 
  CRleEncoder::EncodeResult Encode();
};
 
class CRleDecoder {
  std::shared_ptr< Pipe::CPipe > _pipe_in  = std::make_shared< Pipe::CNullPipe >();
  std::shared_ptr< Pipe::CPipe > _pipe_out = std::make_shared< Pipe::CNullPipe >();
 
public:
  void SetIn(std::shared_ptr< Pipe::CPipe > pipe_in_);
 
  void SetOut(std::shared_ptr< Pipe::CPipe > pipe_out_);
 
  enum DecodeResult {
    DECODE_OK,                    
    DECODE_ERR_INVALID_SIGNATURE, 
    DECODE_ERR_INVALID_PIPE,      
    DECODE_ERR_INVALID_DATA,      
  };
 
  CRleDecoder::DecodeResult Decode();
};
 
} // namespace Rle