API编程 查看Debug信息的方法

杨竹青

//Debug其实主要是处理变参函数，然后发送数据到另一个Debug窗口

//Dlg.cpp
#include "DebugData.h"

void DebugDlg(LPTSTR lpDebugInfo, ...)
{
//处理参数信息
va_argList *pList = new va_argList;
if(pList == NULL)
  return;

BOOL bSetNode = FALSE;
char sMsg[1024];
memset(sMsg, 0, 1024);
char *pStr = lpDebugInfo;
int i = 0;
while(*pStr != '/0')
{
  if(*pStr == '%')
  {
   pStr++;
   if(*pStr != '%')
   {
    i++;
    bSetNode = TRUE;
   }

   if(*pStr == '\0')
    break;
  }
  if(bSetNode)
  {
   switch(*pStr)
   {
   case 'd':
   case 'x':
   case 'o':
   case 'c':
   case 's':
    {
     va_argNode *pNode = new va_argNode(D);
     pList->Add(pNode);
    }
    bSetNode = FALSE;
    break;
   case 'f':
    {
     va_argNode *pNode = new va_argNode(F);
     pList->Add(pNode);
    }
    bSetNode = FALSE;
    break;
   default:
    break;
   }
  }
  pStr++;
}

va_list args;
va_start(args, lpDebugInfo);

va_argNode *pNode = pList->GetHead();
for(int j=0; j<i; j++)
{
  va_argNode *pNextNode = pList->GetNext(&pNode);
  if(pNextNode != NULL)
  {
   if(pNextNode->m_nType == D)
    pNextNode->m_pData = (int *)va_arg(args, int *);
   else
    pNextNode->m_DData = (double)va_arg(args, double);

  }
}

int nTokey = 0;
char *pOldPos = lpDebugInfo;
pStr = lpDebugInfo;
int nOldIndex = 0;
pNode = pList->GetHead();
for(j=0; j<strlen(lpDebugInfo); j++)
{
  if(pStr[j] == '%')
  {
   j++;
   if(pStr[j] == '%')
    j++;

   for(int nKey=0; ; nKey++)
   {
    char sKey = pStr[j+nKey];
    if(sKey == '%')
    {
     j += nKey;
     break;
    }
    if(sKey == '\0')
    {
     j += nKey;
     break;
    }
   }

   char sTmp1[1024];
   memset(sTmp1, 0, 1024);
   char sTmp2[1024];
   memset(sTmp2, 0, 1024);
   memcpy(sTmp1, pOldPos, j-nOldIndex);
   if(nTokey < i)
   {
    va_argNode *pNextNode = pList->GetNext(&pNode);
    if(pNextNode != NULL)
    {
     if(pNextNode->m_nType == D)
      sprintf(sTmp2, sTmp1, pNextNode->m_pData);
     else
      sprintf(sTmp2, sTmp1, pNextNode->m_DData);
    }

    nTokey++;
   }
   strcat(sMsg, sTmp2);
   pOldPos = &pStr[j];
   nOldIndex = j;
   
   j--;
  }
}
if(strlen(sMsg) <= 0)
  sprintf(sMsg, lpDebugInfo);
va_end( args );

if(pList != NULL)
{
  delete pList;
  pList = NULL;
}

//在Debug窗口中显示信息，创建一个主窗口类名为"DebugWnd"的TestAP，显示信息
HWND hDebugWnd = FindWindow("DebugWnd", NULL);
if(hDebugWnd != NULL)
{
  COPYDATASTRUCT cd;
  cd.dwData = 0;
  cd.cbData = strlen(sMsg) + 1;
  cd.lpData = sMsg;
  SendMessage(hDebugWnd, WM_COPYDATA, NULL, LPARAM(&cd));

}
}

调用方法：

DebugDlg("currnet=%d %s time=%d  f=%2.4f 16=(0x)%04x 16=(0o)%o 4=(02d)%02d %s", nCurSel, sLocal, time,  2.3f, 16, 16, 4, "OK");




//以下是 DebugData.h/DebugData.cpp

//DebugData.h

enum dataType{D, F};
struct va_argNode
{
public:
va_argNode(dataType type);

dataType m_nType;
union {
  int *m_pData;
  double m_DData;
};
struct va_argNode *m_pNextNode;

};

class va_argList
{
public:
va_argList();
virtual ~va_argList();
void Add(va_argNode *pNew);
va_argNode *RemoveHead();
va_argNode *GetHead();
va_argNode *GetNext(va_argNode **pNode);

protected:
private:
struct va_argNode *m_pArgList;
};

//DebugData.cpp
va_argNode::va_argNode(dataType type)
{
m_nType = type;
if(m_nType == D)
  m_pData = 0;
else
  m_DData = 0.0;

m_pNextNode = NULL;
}


va_argList::va_argList()
{
m_pArgList = NULL;
}

va_argList::~va_argList()
{
while(m_pArgList != NULL)
{
  va_argNode *pNode = m_pArgList;
  m_pArgList = m_pArgList->m_pNextNode;
  delete pNode;
}
}

void va_argList::Add(va_argNode *pNew)
{
if(pNew == NULL)
  return;

if(m_pArgList == NULL)
{
  m_pArgList = pNew;
  return;
}

va_argNode *pNode = m_pArgList;
while(pNode->m_pNextNode != NULL)
{
  pNode = pNode->m_pNextNode;
}
pNode->m_pNextNode = pNew;
}

va_argNode *va_argList::RemoveHead()
{
va_argNode *pNode = m_pArgList;
if(m_pArgList != NULL)
  m_pArgList = m_pArgList->m_pNextNode;

return pNode;
}

va_argNode *va_argList::GetHead()
{
va_argNode *pNode = m_pArgList;
return pNode;
}

va_argNode *va_argList::GetNext(va_argNode **pNode)
{
va_argNode *pNext = *pNode;
if(*pNode != NULL)
  *pNode = (*pNode)->m_pNextNode;

return pNext;
}

//以下是DebugWnd 及显示的实现

//MainFrm.cpp
BEGIN_MESSAGE_MAP(CMainFrame, CFrameWnd)
//{{AFX_MSG_MAP(CMainFrame)
ON_WM_CREATE()
ON_WM_COPYDATA()
//}}AFX_MSG_MAP
END_MESSAGE_MAP()

BOOL CMainFrame::PreCreateWindow(CREATESTRUCT& cs)
{
// if( !CFrameWnd::PreCreateWindow(cs) )
//  return FALSE;

#ifdef WIN32
    WNDCLASS m_WndClass;
    m_WndClass.style = CS_DBLCLKS | CS_HREDRAW | CS_VREDRAW;
    m_WndClass.lpfnWndProc = AfxWndProc;
    m_WndClass.cbClsExtra = 0;
    m_WndClass.cbWndExtra = 0;
    m_WndClass.hInstance = AfxGetInstanceHandle();
    m_WndClass.hIcon = theApp.LoadIcon(IDR_MAINFRAME);
    m_WndClass.hCursor = ::LoadCursor(NULL,IDC_ARROW);
    m_WndClass.hbrBackground = NULL;
    m_WndClass.lpszMenuName = NULL;
    m_WndClass.lpszClassName = "DebugWnd";
    RegisterClass(&m_WndClass);
    cs.lpszClass = m_WndClass.lpszClassName;
#endif
return CFrameWnd::PreCreateWindow(cs);
}

BOOL CMainFrame::OnCopyData(CWnd* pWnd, COPYDATASTRUCT* pCopyDataStruct)
{
CTestControlView *pView = (CTestControlView *)GetActiveView();
if(pView != NULL)
{
  int nInfo = pCopyDataStruct->cbData;
  if(pView->m_pInfo != NULL)
  {
   delete []pView->m_pInfo;
   pView->m_pInfo = NULL;
  }
  char *pInfo = new char[nInfo];
  strcpy(pInfo, (char *)pCopyDataStruct->lpData);
  pView->m_pInfo = pInfo;
  
  pView->Invalidate();
}
return CFrameWnd::OnCopyData(pWnd, pCopyDataStruct);
}


//testView.h
char  *m_pInfo;


//testView.cpp
void CTestControlView::OnDraw(CDC* pDC)
{
CTestControlDoc* pDoc = GetDocument();
ASSERT_VALID(pDoc);

CString sMsg(m_pInfo);
pDC->TextOut(20, 20, sMsg);
}