decoder.h

Implementation for the Huffman Cod in Visual C++. Both, the encoder and the decoder take as input

#pragma once

#include "HuffmanTree.h"
 
#include <errno.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <io.h>
#include <stdio.h>
#include <string.h>
#include <iostream>

#include <assert.h>

class Decoder
{
public:
	// Constructor with parameters
	// fileName = the name of the input file
	Decoder(LPCWSTR inputFile, LPCWSTR outputFile);

	// Destructor
	~Decoder(void);

public:
	// Decode the input file
	void Decode();

private:
	
	// Write the buffer to file
	// Insert the written symbol in the tree
	void WriteToBuffer(SYMBOL_TYPE symbol);

	// Write the buffer to file
	void WriteBufferToFile();

	// Write a symbol to file
	void WriteSymbolToFile(SYMBOL_TYPE symbol);

	// Tests if the buffer reprezent a symbol
	// Return:
	//		-1 : for "esc" symbol
	//		-2  : if the buffer contains no codification
	//		(int)  : the symbol corresponding to buffer codification
	int TestBuffer();

protected:
	// The intput file
	//int m_inputFile;
	//std::ifstream m_inputFile;

	HANDLE m_inputFile;

	// The output file
	//int m_outputFile;
	//std::ofstream m_outputFile;

	HANDLE m_outputFile;

private:
	// The Huffman tree used for encoding
	HuffmanTree m_tree;

	// va retine codificarea pana la scriere in fisier
	// codificarea va fi inversata, de la frunze la radacina si nu de la radacina la frunze
	bool m_buffer[SYMBOL_NUMBER];

	// the buffer's contor
	unsigned int m_contorBuffer;
};