bchdlg.cpp

一个关于BCH算法的例程

// BCHDlg.cpp : implementation file
//

#include "stdafx.h"
#include "BCH.h"
#include "BCHDlg.h"

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

/////////////////////////////////////////////////////////////////////////////
// CAboutDlg dialog used for App About

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

// Dialog Data
	//{{AFX_DATA(CAboutDlg)
	enum { IDD = IDD_ABOUTBOX };
	//}}AFX_DATA

	// ClassWizard generated virtual function overrides
	//{{AFX_VIRTUAL(CAboutDlg)
	protected:
	virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV support
	//}}AFX_VIRTUAL

// Implementation
protected:
	//{{AFX_MSG(CAboutDlg)
	//}}AFX_MSG
	DECLARE_MESSAGE_MAP()
};

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

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

BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
	//{{AFX_MSG_MAP(CAboutDlg)
		// No message handlers
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CBCHDlg dialog

CBCHDlg::CBCHDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CBCHDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CBCHDlg)
	m_1 = 0;
	m_2 = 0;
	m_3 = 0;
	m_4 = 0;
	m_5 = 0;
	m_6 = 0;
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CBCHDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CBCHDlg)
	DDX_Text(pDX, IDC_EDIT1, m_1);
	DDX_Text(pDX, IDC_EDIT2, m_2);
	DDX_Text(pDX, IDC_EDIT3, m_3);
	DDX_Text(pDX, IDC_EDIT4, m_4);
	DDX_Text(pDX, IDC_EDIT5, m_5);
	DDX_Text(pDX, IDC_EDIT6, m_6);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CBCHDlg, CDialog)
	//{{AFX_MSG_MAP(CBCHDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_BUTTON2, OnButton2)
	ON_BN_CLICKED(IDC_BUTTON1, Onjisuan)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CBCHDlg message handlers

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

	// Add "About..." menu item to system menu.

	// IDM_ABOUTBOX must be in the system command range.
	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);
		}
	}

	// Set the icon for this dialog.  The framework does this automatically
	//  when the application's main window is not a dialog
	SetIcon(m_hIcon, TRUE);			// Set big icon
	SetIcon(m_hIcon, FALSE);		// Set small icon
	
	// TODO: Add extra initialization here
	
	return TRUE;  // return TRUE  unless you set the focus to a control
}

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

// If you add a minimize button to your dialog, you will need the code below
//  to draw the icon.  For MFC applications using the document/view model,
//  this is automatically done for you by the framework.

void CBCHDlg::OnPaint() 
{
	if (IsIconic())
	{
		CPaintDC dc(this); // device context for painting

		SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);

		// Center icon in client rectangle
		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;

		// Draw the icon
		dc.DrawIcon(x, y, m_hIcon);
	}
	else
	{
		CDialog::OnPaint();
	}
}

// The system calls this to obtain the cursor to display while the user drags
//  the minimized window.
HCURSOR CBCHDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

void CBCHDlg::OnButton2() 
{
	OnCancel();	
}


//BCH校验码
const unsigned char BCH_table[256] =
{
     0x00,0x07,0x0E,0x09,  0x1C,0x1B,0x12,0x15,  0x38,0x3F,0x36,0x31,  0x24,0x23,0x2A,0x2D,  
     0x70,0x77,0x7E,0x79,  0x6C,0x6B,0x62,0x65,  0x48,0x4F,0x46,0x41,  0x54,0x53,0x5A,0x5D,  
     0xE0,0xE7,0xEE,0xE9,  0xFC,0xFB,0xF2,0xF5,  0xD8,0xDF,0xD6,0xD1,  0xC4,0xC3,0xCA,0xCD,  
     0x90,0x97,0x9E,0x99,  0x8C,0x8B,0x82,0x85,  0xA8,0xAF,0xA6,0xA1,  0xB4,0xB3,0xBA,0xBD,  
     0xC7,0xC0,0xC9,0xCE,  0xDB,0xDC,0xD5,0xD2,  0xFF,0xF8,0xF1,0xF6,  0xE3,0xE4,0xED,0xEA,  
     0xB7,0xB0,0xB9,0xBE,  0xAB,0xAC,0xA5,0xA2,  0x8F,0x88,0x81,0x86,  0x93,0x94,0x9D,0x9A,  
     0x27,0x20,0x29,0x2E,  0x3B,0x3C,0x35,0x32,  0x1F,0x18,0x11,0x16,  0x03,0x04,0x0D,0x0A,  
     0x57,0x50,0x59,0x5E,  0x4B,0x4C,0x45,0x42,  0x6F,0x68,0x61,0x66,  0x73,0x74,0x7D,0x7A,  

     0x89,0x8E,0x87,0x80,  0x95,0x92,0x9B,0x9C,  0xB1,0xB6,0xBF,0xB8,  0xAD,0xAA,0xA3,0xA4,  
     0xF9,0xFE,0xF7,0xF0,  0xE5,0xE2,0xEB,0xEC,  0xC1,0xC6,0xCF,0xC8,  0xDD,0xDA,0xD3,0xD4,  
     0x69,0x6E,0x67,0x60,  0x75,0x72,0x7B,0x7C,  0x51,0x56,0x5F,0x58,  0x4D,0x4A,0x43,0x44,  
     0x19,0x1E,0x17,0x10,  0x05,0x02,0x0B,0x0C,  0x21,0x26,0x2F,0x28,  0x3D,0x3A,0x33,0x34,  
     0x4E,0x49,0x40,0x47,  0x52,0x55,0x5C,0x5B,  0x76,0x71,0x78,0x7F,  0x6A,0x6D,0x64,0x63,  
     0x3E,0x39,0x30,0x37,  0x22,0x25,0x2C,0x2B,  0x06,0x01,0x08,0x0F,  0x1A,0x1D,0x14,0x13,  
     0xAE,0xA9,0xA0,0xA7,  0xB2,0xB5,0xBC,0xBB,  0x96,0x91,0x98,0x9F,  0x8A,0x8D,0x84,0x83,  
     0xDE,0xD9,0xD0,0xD7,  0xC2,0xC5,0xCC,0xCB,  0xE6,0xE1,0xE8,0xEF,  0xFA,0xFD,0xF4,0xF3
};


void CBCHDlg::Onjisuan()   //计算BCH值
{
	UpdateData();

    BYTE BCH_Array[5];
	BCH_Array[0]=m_1;
	
	BCH_Array[1]=m_2;

	BCH_Array[2]=m_3;

	BCH_Array[3]=m_4;

	BCH_Array[4]=m_5;

	BCH_Array[5]=0;

    BCH_Array[5]=BCH_Array[5] ^ BCH_Array[0];
    BCH_Array[5]=BCH_table[BCH_Array[5]];

    BCH_Array[5]=BCH_Array[5] ^ BCH_Array[1];
    BCH_Array[5]=BCH_table[BCH_Array[5]];

    BCH_Array[5]=BCH_Array[5] ^ BCH_Array[2];
    BCH_Array[5]=BCH_table[BCH_Array[5]];

    BCH_Array[5]=BCH_Array[5] ^ BCH_Array[3];
    BCH_Array[5]=BCH_table[BCH_Array[5]];

    BCH_Array[5]=BCH_Array[5] ^ BCH_Array[4];
    BCH_Array[5]=BCH_table[BCH_Array[5]];
    
    BCH_Array[5]=~(BCH_Array[5]);

	m_6=BCH_Array[5];

		UpdateData(FALSE);
}