crctestdlg.cpp

用几种不同的方法来实现CRC算法.可以带初值

// CRCTestDlg.cpp : implementation file
//

#include "stdafx.h"
#include "CRCTest.h"
#include "CRCTestDlg.h"

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

/////////////////////////////////////////////////////////////////////////////
// CCRCTestDlg dialog

CCRCTestDlg::CCRCTestDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CCRCTestDlg::IDD, pParent)
{
	m_strDataFile = _T("");
	//{{AFX_DATA_INIT(CCRCTestDlg)
	m_nCRCMode = 2;
	m_crcInitValue = 0;
	m_bNotValue = FALSE;
	m_strData = _T("");
	m_strCRC = _T("");
	m_bDataNot = FALSE;
	m_nCRCMethod = 1;
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CCRCTestDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CCRCTestDlg)
	DDX_Control(pDX, IDC1_R_CRC_CUSTOM, m_radCRCCustom);
	DDX_Radio(pDX, IDC1_R_CRC_12, m_nCRCMode);
	DDX_Radio(pDX, IDC1_R_CRC_INITIAL_VALUE_0, m_crcInitValue);
	DDX_Check(pDX, IDC1_CK_CRC_NOT, m_bNotValue);
	DDX_Text(pDX, IDC1_E_DATA, m_strData);
	DDX_Text(pDX, IDC1_E_CRC_RESULT, m_strCRC);
	DDX_Check(pDX, IDC1_CK_DATA_NOT, m_bDataNot);
	DDX_Radio(pDX, IDC1_R_CRC_METHOD_16, m_nCRCMethod);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CCRCTestDlg, CDialog)
	//{{AFX_MSG_MAP(CCRCTestDlg)
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC1_B_CRC, OnBCrc)
	ON_BN_CLICKED(IDC1_R_CRC_12, OnRCrc)
	ON_BN_CLICKED(IDC1_R_CRC_CUSTOM, OnRCrcCustom)
	ON_BN_CLICKED(IDC1_CK_CRC_NOT, OnCkCrcNot)
	ON_BN_CLICKED(IDC1_B_DATA_FILE, OnBDataFile)
	ON_BN_CLICKED(IDC1_R_CRC_16, OnRCrc)
	ON_BN_CLICKED(IDC1_R_CRC_32, OnRCrc)
	ON_BN_CLICKED(IDC1_R_CRC_CCITT, OnRCrc)
	ON_BN_CLICKED(IDC1_CK_DATA_CLEAR, OnCkDataClear)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CCRCTestDlg message handlers

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

	// 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
	SubClassComboBox(IDC1_LST_CRC_POLY);
	return TRUE;  // return TRUE  unless you set the focus to a control
}

// 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 CCRCTestDlg::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 CCRCTestDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

#include "CRCTable.h"
void CCRCTestDlg::OnBCrc() 
{
	UpdateData();
	BOOL X[33];
	memset(X,0,sizeof(X));
	CString str,str1;
	str="CRC-自定义: ";
	if(m_nCRCMode==0)//CRC12
	{
		X[12]=1;
		X[11]=1;
		X[ 3]=1;
		X[ 2]=1;
		X[ 1]=1;
		X[ 0]=1;
	}
	else if(m_nCRCMode==1)//CRC16
	{
		X[16]=1;
		X[15]=1;
		X[ 2]=1;
		X[ 0]=1;
	}
	else if(m_nCRCMode==2)//CRC-CCITT
	{
		X[16]=1;
		X[12]=1;
		X[ 5]=1;
		X[ 0]=1;
	}
	else if(m_nCRCMode==3)//CRC32
	{
		//X32+x26+x23+x22+x16+x12+x11+x10+x8+x7+x5+x4+x2+x+x0
		X[32]=1;
		X[26]=1;
		X[23]=1;
		X[22]=1;
		X[16]=1;
		X[12]=1;
		X[11]=1;
		X[10]=1;
		X[ 8]=1;
		X[ 7]=1;
		X[ 5]=1;
		X[ 4]=1;
		X[ 2]=1;
		X[ 1]=1;
		X[ 0]=1;
	}
	else if(m_nCRCMode==4)
	{
		str="";
		for(int i=0;i<33;i++)
		{
			X[i]=m_chkLst.GetCheck(i);
			if(X[i])
			{
				str1.Format("+x%d",i);
				str=str1+str;
			}
		}
		if(str.GetLength()>0) str=str.Mid(1);
		str="CRC-自定义: "+str;
	}
	m_radCRCCustom.SetWindowText(str);
	if(m_strDataFile.GetLength()==0) 
	{
		CString strBuf,strData;
		strData=m_strData;
		strData.TrimLeft();
		strData.TrimRight();
		strData.MakeLower();
		strData.Replace("\t","");
		strData.Replace("\r","");
		strData.Replace("\n","");
		m_strData = strData;
		if(m_strData.GetLength()==0)
		{
			m_nCRCMethod?CCRCTable256(X,33).ShowCRCTable(&m_strData):
			CCRCTable16(X,33).ShowCRCTable(&m_strData);
			UpdateData(FALSE);
			return;
		}
		strData.Replace(",","");
		strData.Replace(" ","");
		strData.Replace("0x","");
		if(strData.GetLength()==0){return ;}
		if(strData.GetLength()&1){MessageBox("数据长度应该是偶数"); return ;}
		CHAR*p=strBuf.GetBuffer(strData.GetLength()/2);
		CHAR h;
		for(int k=0;k<strData.GetLength()/2;k++)
		{
			h=strData.GetAt(k<<1);
			if(h>='a')h-='a'-0xa;
			else h-='0';
			if((h<0)||(h>15)) {MessageBox("含有非法数据"); return ;}
			p[k]=(h<<4);
			h=strData.GetAt((k<<1)+1);
			if(h>='a')h-='a'-0xa;
			else h-='0';
			if((h<0)||(h>15)) {MessageBox("含有非法数据"); return ;}
			p[k]|=h&0x0f;
			if(m_bDataNot)p[k]=~p[k];
		}
		DWORD m_dwCRC=
			m_nCRCMethod?
			CCRCTable256(X,33).CRC((BYTE*)p,k,~(m_crcInitValue-1)):
			CCRCTable16(X,33).CRC((BYTE*)p,k,~(m_crcInitValue-1));
		strBuf.ReleaseBuffer();
		if(m_bNotValue)m_dwCRC=~m_dwCRC;
		DWORD i=CCRCTable16(X,33).m_bits;
		if(i!=32)m_dwCRC&=((1<<i)-1);
		m_strCRC.Format("0X%08X",m_dwCRC);
	}
	else
	{
		m_strData="";
		CStdioFile f;
		if(!f.Open(m_strDataFile,CFile::modeRead|CFile::shareDenyNone)) 
		{
			AfxMessageBox(m_strDataFile+"文件不存在！");
			return;
		}
		CString str,strID,strBuf,strData;
		U32 crcBytes=0;
		while(f.ReadString(str)){
			if(1==::sscanf(str,"校验数据字节数:%d",&crcBytes))
				f.ReadString(str);
			break;
		}
		do{
			strData=str;
			strData.TrimLeft();
			strData.TrimRight();
			strData.MakeLower();
			strData.Replace("\t","");
			strData.Replace("\r","");
			strData.Replace("\n","");
			strData.Replace(",","");
			strData.Replace(" ","");
			strData.Replace("0x","");
			int iFind=strData.Find(":");
			if(iFind>0)
			{
				strID=strData.Left(iFind+1);
				strData=strData.Mid(iFind+1);
			}
			else strID="";
			if(strData.GetLength()==0){ continue; }
			if(strData.GetLength()&1){MessageBox(str+"\n数据长度应该是偶数"); return ;}
			if(strData.GetLength()<(crcBytes+1)*2){MessageBox(str+"\n数据中应包含校验数据"); return ;}
			BYTE*p=(BYTE*)strBuf.GetBuffer(strData.GetLength()/2);
			BYTE h;
			for(int k=0;k<strData.GetLength()/2;k++)
			{
				h=strData.GetAt(k<<1);
				if(h>='a')h-='a'-0xa;
				else h-='0';
				if((h<0)||(h>15)) {MessageBox("含有非法数据"); return ;}
				p[k]=(h<<4);
				h=strData.GetAt((k<<1)+1);
				if(h>='a')h-='a'-0xa;
				else h-='0';
				if((h<0)||(h>15)) {MessageBox("含有非法数据"); return ;}
				p[k]|=h&0x0f;
				if(m_bDataNot)p[k]=~p[k];
			}
			DWORD m_dwCRC=
				m_nCRCMethod?
				CCRCTable256(X,33).CRC((BYTE*)p,k-crcBytes,~(m_crcInitValue-1)):
			CCRCTable16(X,33).CRC((BYTE*)p,k-crcBytes,~(m_crcInitValue-1));
			strBuf.ReleaseBuffer();
			if(m_bNotValue)m_dwCRC=~m_dwCRC;
			DWORD i=CCRCTable16(X,33).m_bits;
			if(i!=32)m_dwCRC&=((1<<i)-1);
			str.Format("0X%08X\r\n",m_dwCRC);
			m_strData+=strID+str;
		}while(f.ReadString(str));
	}
	UpdateData(FALSE);
}

void CCRCTestDlg::OnCkDataClear() 
{
	// TODO: Add your control notification handler code here
	m_strData="";
	UpdateData(FALSE);
}

void CCRCTestDlg::OnRCrc() 
{
	// TODO: Add your control notification handler code here
	m_radCRCCustom.SetWindowText("CRC-自定义: ");
	m_chkLst.EnableWindow(FALSE);
}

void CCRCTestDlg::OnRCrcCustom() 
{
	// TODO: Add your control notification handler code here
	OnRCrc();
	m_chkLst.EnableWindow(TRUE);
}

void CCRCTestDlg::OnCkCrcNot() 
{
	// TODO: Add your control notification handler code here
	UpdateData(TRUE);
	//m_bNotValue=!m_bNotValue;
	DWORD m_dwCRC=0;
	sscanf(m_strCRC,"0X%X",&m_dwCRC);
	m_dwCRC=~m_dwCRC;
	m_strCRC.Format("0X%08X",m_dwCRC);
	UpdateData(FALSE);
}

void CCRCTestDlg::OnCancel() 
{
	// TODO: Add extra cleanup here
	
	YM_SY();
	CDialog::OnCancel();
}

VOID SetCurDir()
{
	CHAR curPath[255];
	GetModuleFileName(NULL,curPath,255);
	*strrchr(curPath,'\\')='\0';
	BOOL b=SetCurrentDirectory(curPath);
}

void CCRCTestDlg::OnBDataFile() 
{
	// TODO: Add your control notification handler code here
	CHAR curPath[255]={0};
	GetModuleFileName(NULL,curPath,255);
	*(strrchr(curPath,'\\')+1)='\0';
	//strcat(curPath,"*.txt");
	CFileDialog f(TRUE);
	//SetCurDir();
	//static CHAR* sFilter="*.txt\0*.txt\0所有文件(*.*)\0*.*\0\0";
	//f.m_ofn.lpstrFile=curPath;
	f.m_ofn.lpstrInitialDir=curPath;
	f.m_ofn.lpstrFilter="*.txt\0*.txt\0所有文件(*.*)\0*.*\0\0";
	if(f.DoModal()==IDOK)
	{
		m_strDataFile=f.GetFileName();
		OnBCrc();
		m_strDataFile="";
	}
}