www.gusucode.com > Base64的编解码方法JavaScript源码程序 > Base64的编解码方法/SeeBase64/SeeBase64Dlg.cpp

    // SeeBase64Dlg.cpp : 实现文件
//

#include "stdafx.h"
#include "SeeBase64.h"
#include "SeeBase64Dlg.h"
#include ".\seebase64dlg.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#endif


// 用于应用程序“关于”菜单项的 CAboutDlg 对话框

class CAboutDlg : public CDialog
{
public:
	CAboutDlg();

// 对话框数据
	enum { IDD = IDD_ABOUTBOX };

	protected:
	virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV 支持

// 实现
protected:
	DECLARE_MESSAGE_MAP()
};

CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD)
{
}

void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
}

BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
END_MESSAGE_MAP()


// CSeeBase64Dlg 对话框



CSeeBase64Dlg::CSeeBase64Dlg(CWnd* pParent /*=NULL*/)
	: CDialog(CSeeBase64Dlg::IDD, pParent)
{
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CSeeBase64Dlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	DDX_Control(pDX, IDC_TAB1, m_MainTab);
}

BEGIN_MESSAGE_MAP(CSeeBase64Dlg, CDialog)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	//}}AFX_MSG_MAP
	ON_NOTIFY(TCN_SELCHANGE, IDC_TAB1, OnTabSelChange)
	ON_BN_CLICKED(IDC_BTN_DCD, OnBnClickedBtnDcd)
	ON_WM_SHOWWINDOW()
	ON_BN_CLICKED(IDC_BTN_ECD, OnBnClickedBtnEcd)
END_MESSAGE_MAP()


// CSeeBase64Dlg 消息处理程序

BOOL CSeeBase64Dlg::OnInitDialog()
{
	CDialog::OnInitDialog();

	// 将\“关于...\”菜单项添加到系统菜单中。

	// IDM_ABOUTBOX 必须在系统命令范围内。
	ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
	ASSERT(IDM_ABOUTBOX < 0xF000);

	CMenu* pSysMenu = GetSystemMenu(FALSE);
	if (pSysMenu != NULL)
	{
		CString strAboutMenu;
		strAboutMenu.LoadString(IDS_ABOUTBOX);
		if (!strAboutMenu.IsEmpty())
		{
			pSysMenu->AppendMenu(MF_SEPARATOR);
			pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
		}
	}

	// 设置此对话框的图标。当应用程序主窗口不是对话框时，框架将自动
	//  执行此操作
	SetIcon(m_hIcon, TRUE);			// 设置大图标
	SetIcon(m_hIcon, FALSE);		// 设置小图标

	// TODO: 在此添加额外的初始化代码
	InitUiTab();
	AfxOleInit();
	
	return TRUE;  // 除非设置了控件的焦点，否则返回 TRUE
}

void CSeeBase64Dlg::OnSysCommand(UINT nID, LPARAM lParam)
{
	if ((nID & 0xFFF0) == IDM_ABOUTBOX)
	{
		CAboutDlg dlgAbout;
		dlgAbout.DoModal();
	}
	else
	{
		CDialog::OnSysCommand(nID, lParam);
	}
}

// 如果向对话框添加最小化按钮，则需要下面的代码
//  来绘制该图标。对于使用文档/视图模型的 MFC 应用程序，
//  这将由框架自动完成。

void CSeeBase64Dlg::OnPaint() 
{
	if (IsIconic())
	{
		CPaintDC dc(this); // 用于绘制的设备上下文

		SendMessage(WM_ICONERASEBKGND, reinterpret_cast<WPARAM>(dc.GetSafeHdc()), 0);

		// 使图标在工作矩形中居中
		int cxIcon = GetSystemMetrics(SM_CXICON);
		int cyIcon = GetSystemMetrics(SM_CYICON);
		CRect rect;
		GetClientRect(&rect);
		int x = (rect.Width() - cxIcon + 1) / 2;
		int y = (rect.Height() - cyIcon + 1) / 2;

		// 绘制图标
		dc.DrawIcon(x, y, m_hIcon);
	}
	else
	{
		CDialog::OnPaint();
	}
}

//当用户拖动最小化窗口时系统调用此函数取得光标显示。
HCURSOR CSeeBase64Dlg::OnQueryDragIcon()
{
	return static_cast<HCURSOR>(m_hIcon);
}

void CSeeBase64Dlg::InitUiTab()
{
	m_TabDlgText.Create(IDD_DIAG_TEXT, this);
	m_TabDlgFile.Create(IDD_DIAG_FILE, this);

	CRect TabRc;
	CRect DlgRc;

	m_MainTab.GetWindowRect(&TabRc);
	ScreenToClient(&TabRc);

	TabRc.left += 10;
	TabRc.top += 40;
	TabRc.bottom -= 10;
	TabRc.right -= 10;

	m_TabDlgText.MoveWindow(&TabRc, TRUE);
	m_TabDlgFile.MoveWindow(&TabRc, TRUE);

	m_MainTab.InsertItem(0, "Text");
	m_MainTab.InsertItem(1, "File");

	ShowTab(0);
}

void CSeeBase64Dlg::ShowTab(int idx)
{
	if (idx == 0)
	{
		m_TabDlgText.ShowWindow(SW_SHOW);
		m_TabDlgFile.ShowWindow(SW_HIDE);

		CWnd * pwnd = m_TabDlgText.GetDlgItem(IDC_EDIT_BASE64);
		pwnd->SetFocus();
	}
	else
	{
		m_TabDlgText.ShowWindow(SW_HIDE);
		m_TabDlgFile.ShowWindow(SW_SHOW);

		CWnd * pwnd = m_TabDlgFile.GetDlgItem(IDC_EDIT_BASE64_FILE);
		pwnd->SetFocus();
	}
}

void CSeeBase64Dlg::OnTabSelChange( NMHDR * pNotifyStruct, LRESULT * result )
{
	int idx = m_MainTab.GetCurSel();
	ShowTab(idx);
}

void CSeeBase64Dlg::OnBnClickedBtnDcd()
{
	// TODO: 在此添加控件通知处理程序代码

	int idx = m_MainTab.GetCurSel();

	if (idx == 0)
	{
		// decode base64 string
		OnDecodeBase64StringBtn();
	}
	else
	{
		// decode base64 file
		OnDecodeBase64FileBtn();
	}
}

void CSeeBase64Dlg::OnDecodeBase64StringBtn()
{
	m_TabDlgText.UpdateData(TRUE);

	DecodeBase64(m_TabDlgText.m_strInput.GetBuffer(1024), m_TabDlgText.m_strOutput.GetBuffer(1024));
	m_TabDlgText.m_strInput.ReleaseBuffer();
	m_TabDlgText.m_strOutput.ReleaseBuffer();

	m_TabDlgText.UpdateData(FALSE);
}

#define DCD_ONCE_LEN	400*1024
#define CDC_ONCE_LEN	300*1024

void CSeeBase64Dlg::OnDecodeBase64FileBtn()
{
	CFile Base64File;
	CFile NativeFile;

	if (FALSE == Base64File.Open(m_TabDlgFile.m_strBase64File, CFile::modeRead))
	{
		AfxMessageBox("Open Base64 File Failed!");
		return;
	}
		
	if (FALSE == NativeFile.Open(m_TabDlgFile.m_strNativeFile, CFile::modeReadWrite))
	{
		Base64File.Close();
		AfxMessageBox("Open Native File Failed!");
		return;
	}

	char * pszInput = new char[DCD_ONCE_LEN+1];
	char * pszOutput = new char[CDC_ONCE_LEN+1];

	memset(pszInput, 0x00, DCD_ONCE_LEN+1);
	memset(pszOutput, 0x00, CDC_ONCE_LEN+1);
	
	while (1)
	{
		int iLen = 0;

		iLen = Base64File.Read(pszInput, DCD_ONCE_LEN);

		int iDstLen = DecodeBase64(pszInput, pszOutput);

		NativeFile.Write(pszOutput, iDstLen);

		if (iLen < DCD_ONCE_LEN)
		{
			break;
		}
	}

	delete [] pszInput;
	delete [] pszOutput;

	Base64File.Close();
	NativeFile.Close();

	AfxMessageBox("Decode OK!");
}

const BYTE Base64IdxTab[128] =
{
	255,255,255,255,  255,255,255,255,  255,255,255,255,  255,255,255,255,
	255,255,255,255,  255,255,255,255,  255,255,255,255,  255,255,255,255,
	255,255,255,255,  255,255,255,255,  255,255,255,62,   255,255,255,63,
	52,53,54,55,      56,57,58,59,      60,61,255,255,    255,255,255,255,
	255,0,1,2,        3,4,5,6,          7,8,9,10,         11,12,13,14,
	15,16,17,18,      19,20,21,22,      23,24,25,255,     255,255,255,255,
	255,26,27,28,     29,30,31,32,      33,34,35,36,      37,38,39,40,
	41,42,43,44,      45,46,47,48,      49,50,51,255,     255,255,255,255
};

#define BVal(x) Base64IdxTab[x]

int CSeeBase64Dlg::DecodeBase64(char * pInput, char * pOutput)
{
	int i = 0;
	int iCnt = 0;
	int iSrcLen = (int)strlen(pInput);

	char * p = pOutput;

	for (i=0; i<iSrcLen; i++)
	{
		if (pInput[i] > 127) continue;
		if (pInput[i] == '=') return p-pOutput+1;

		BYTE a = BVal(pInput[i]);
		if (a == 255) continue;
		
		switch (iCnt)
		{
		case 0:
			{
				*p = a << 2;
				iCnt++;
			}
			break;

		case 1:
			{
				*p++ |= a >> 4;
				*p = a << 4;
				iCnt++;
			}
			break;

		case 2:
			{
				*p++ |= a >> 2;
				*p = a << 6;
				iCnt++;
			}
			break;

		case 3:
			{
				*p++ |= a;
				iCnt = 0;
			}
			break;
		} 
	}

	*p = 0x00;
	return p-pOutput;
}


void CSeeBase64Dlg::OnShowWindow(BOOL bShow,UINT nStatus)
{
	CWnd * pwnd = m_TabDlgText.GetDlgItem(IDC_EDIT_BASE64);
	pwnd->SetFocus();
}

void CSeeBase64Dlg::OnBnClickedBtnEcd()
{
	int idx = m_MainTab.GetCurSel();

	if (idx == 0)
	{
		// decode base64 string
		OnEncodeBase64StringBtn();
	}
	else
	{
		// decode base64 file
		OnEncodeBase64FileBtn();
	}
}

void CSeeBase64Dlg::OnEncodeBase64StringBtn()
{
	m_TabDlgText.UpdateData(TRUE);

	EncodeBase64(m_TabDlgText.m_strOutput.GetBuffer(1024), m_TabDlgText.m_strInput.GetBuffer(1024));
	m_TabDlgText.m_strInput.ReleaseBuffer();
	m_TabDlgText.m_strOutput.ReleaseBuffer();

	m_TabDlgText.UpdateData(FALSE);
}

void CSeeBase64Dlg::OnEncodeBase64FileBtn()
{
	CFile Base64File;
	CFile NativeFile;

	if (FALSE == Base64File.Open(m_TabDlgFile.m_strBase64File, CFile::modeRead))
	{
		AfxMessageBox("Open Base64 File Failed!");
		return;
	}

	if (FALSE == NativeFile.Open(m_TabDlgFile.m_strNativeFile, CFile::modeReadWrite))
	{
		Base64File.Close();
		AfxMessageBox("Open Native File Failed!");
		return;
	}

	char * pszInput = new char[CDC_ONCE_LEN+1];
	char * pszOutput = new char[DCD_ONCE_LEN+1];

	memset(pszInput, 0x00, CDC_ONCE_LEN+1);
	memset(pszOutput, 0x00, DCD_ONCE_LEN+1);

	while (1)
	{
		int iLen = 0;
		
		iLen = NativeFile.Read(pszInput, CDC_ONCE_LEN);

		int iDstLen = EncodeBase64(pszInput, pszOutput);

		Base64File.Write(pszOutput, iDstLen);

		if (iLen < CDC_ONCE_LEN)
		{
			break;
		}
	}

	Base64File.Close();
	NativeFile.Close();

	delete [] pszInput;
	delete [] pszOutput;

	AfxMessageBox("Encode OK!");
}

const BYTE Base64ValTab[65] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";

#define AVal(x) Base64ValTab[x]

int CSeeBase64Dlg::EncodeBase64(char * pInput, char * pOutput)
{
	int i = 0;
	int loop = 0;
	int remain = 0;
	int iDstLen = 0;
	int iSrcLen = (int)strlen(pInput);

	loop = iSrcLen/3;
	remain = iSrcLen%3;

	// also can encode native char one by one as decode method
	// but because all of char in native string  is to be encoded so encode 3-chars one time is easier.

	for (i=0; i<loop; i++)
	{
		BYTE a1 = (pInput[i*3] >> 2);
		BYTE a2 = ( ((pInput[i*3] & 0x03) << 4) | (pInput[i*3+1] >> 4) );
		BYTE a3 = ( ((pInput[i*3+1] & 0x0F) << 2) | ((pInput[i*3+2] & 0xC0) >> 6) );
		BYTE a4 = (pInput[i*3+2] & 0x3F);

		pOutput[i*4] = AVal(a1);
		pOutput[i*4+1] = AVal(a2);
		pOutput[i*4+2] = AVal(a3);
		pOutput[i*4+3] = AVal(a4);
	}

	iDstLen = i*4;

	if (remain == 1)
	{
		// should pad two equal sign
		i = iSrcLen-1;
		BYTE a1 = (pInput[i] >> 2);
		BYTE a2 = ((pInput[i] & 0x03) << 4);
		
		pOutput[iDstLen++] = AVal(a1);
		pOutput[iDstLen++] = AVal(a2);
		pOutput[iDstLen++] = '=';
		pOutput[iDstLen++] = '=';
		pOutput[iDstLen] = 0x00;
	}
	else if (remain == 2)
	{
		// should pad one equal sign
		i = iSrcLen-2;
		BYTE a1 = (pInput[i] >> 2);
		BYTE a2 = ( ((pInput[i] & 0x03) << 4) | (pInput[i+1] >> 4));
		BYTE a3 = ( (pInput[i+1] & 0x0F) << 2);

		pOutput[iDstLen++] = AVal(a1);
		pOutput[iDstLen++] = AVal(a2);
		pOutput[iDstLen++] = AVal(a3);
		pOutput[iDstLen++] = '=';
		pOutput[iDstLen] = 0x00;
	}
	else
	{
		// just division by 3
		pOutput[iDstLen] = 0x00;
	}

	return iDstLen;
}