extract.cpp

一个数据结构课程之后自己编写的lzw压缩算法

// extract.cpp : implementation file
//

#include "stdafx.h"
#include "lzw.h"
#include "extract.h"
#include "fz.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// extract dialog


extract::extract(CWnd* pParent /*=NULL*/)
	: CDialog(extract::IDD, pParent)
{
	//{{AFX_DATA_INIT(extract)
	m_filepath1 = _T("");
	m_filename1 = _T("");
	m_filepath2 = _T("");
	m_filename2 = _T("");
	//}}AFX_DATA_INIT
}


void extract::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(extract)
	DDX_Text(pDX, IDC_EDIT1, m_filepath1);
	DDX_Text(pDX, IDC_EDIT2, m_filename1);
	DDX_Text(pDX, IDC_EDIT3, m_filepath2);
	DDX_Text(pDX, IDC_EDIT4, m_filename2);
	//}}AFX_DATA_MAP
}


BEGIN_MESSAGE_MAP(extract, CDialog)
	//{{AFX_MSG_MAP(extract)
	ON_BN_CLICKED(IDC_BUTTON1, OnButton1)
	ON_BN_CLICKED(IDC_BUTTON2, OnButton2)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// extract message handlers

void extract::OnButton1() 
{
	// TODO: Add your control notification handler code here
	char directory[100];
	SHGetSpecialFolderPath(NULL, directory, CSIDL_DESKTOP, 0);
	CFileDialog fd(TRUE, "pzc", NULL, OFN_PATHMUSTEXIST | OFN_FILEMUSTEXIST, "压缩文档(.pzc)|*.pzc|所有文件(*.*)|*.*||");
	fd.m_ofn.lpstrInitialDir = directory;
	if (fd.DoModal()==IDOK)		
	{
		m_filepath1 = fd.GetPathName();
		m_filename1 = fd.GetFileName();
		UpdateData(FALSE);
	} 
}

void extract::OnButton2() 
{
	// TODO: Add your control notification handler code here
	char directory[100];
	SHGetSpecialFolderPath(NULL, directory, CSIDL_DESKTOP, 0);
	CFileDialog fd(FALSE, "txt", NULL, OFN_CREATEPROMPT | OFN_OVERWRITEPROMPT, " 压缩文档(.txt)|*.txt|所有文件(*.*)|*.*||");
	fd.m_ofn.lpstrInitialDir = directory;
	if (fd.DoModal()==IDOK)		
	{
		m_filepath2 = fd.GetPathName();
		m_filename2 = fd.GetFileName();
		UpdateData(FALSE);
	} 
}




void extract::OnOK() 
{
	// TODO: Add extra validation here
	HASH2 hash[4098];
	initial2(hash);
	int n=getfilelen(m_filepath1);
	char *ptr=readfile2(m_filepath1,n);
	int *numfile=new int [n/3*2+3];
	bitoperation(ptr,numfile,n);
	n=(n%3) ?  (n/3*2+1) : (n/3*2);
	clear2(m_filepath2);
	ext(hash,numfile,n,m_filepath2);	
	int j=MessageBox("完成!","Finish",MB_OK);
	if (j==IDOK) CDialog::OnOK();
}