w95trace1.cpp

C++下贪吃蛇的实现,可以供大家学习研究

/*
    Implementation of Win95 tracing facility to mimic that of NT
*/

#include "stdafx.h"

#include "windows.h"
#include <stdio.h>
#include <stdarg.h>
#include <process.h>
//#include "w95trace.h"
#include <afxpriv.h>	// for MFC WM_ messages


#ifdef _DEBUG

int CTraceFn::nIndent=-1;	    // current indent level
#define _countof(array) (sizeof(array)/sizeof(array[0]))

#include <time.h>
void ClearDebugWindow(char *str/*=0*/, BOOL bClean/*=TRUE*/)
{
    char timestr[80];
    time_t ltime;
    time(&ltime);
    wsprintf(timestr, "********** %s **********", ctime(&ltime));

    if ((bClean == FALSE) && (str == 0)) return;
    else 
    {
        HWND hDbgWnd, hEdit;
        hDbgWnd = (HWND) FindWindow("DBWin32", "Debug Messages (WIN32)");
        if (hDbgWnd != NULL)
        {
            char *fullStr = 0;
            if (str == 0)
            {
                fullStr = new char[60];
                strcpy(fullStr, "\r\n");
                strcat(fullStr, timestr);
                strcat(fullStr, "\r\n\r\n");
            }
            else
            {
                fullStr = new char[strlen(str)+1+120];
                strcpy(fullStr, "\r\n");
                strcat(fullStr, timestr);
                strcat(fullStr, "\r\n");
                strcat(fullStr, str);
                strcat(fullStr, "\r\n\r\n");
            }
            hEdit = (HWND) FindWindowEx(hDbgWnd, NULL, "Edit", "");
            int len;
            if ((bClean == FALSE) && (str != 0))
            {
                len = SendMessage(hEdit, WM_GETTEXTLENGTH, 0, 0);
                SendMessage(hEdit, EM_SETSEL, len+1, len+1);
                SendMessage(hEdit, EM_REPLACESEL, FALSE, (long) fullStr);
            }
            else // (bClean == TRUE)
                SendMessage(hEdit, WM_SETTEXT, 0, (long) fullStr);
            len = SendMessage(hEdit, WM_GETTEXTLENGTH, 0, 0);
            SendMessage(hEdit, EM_SETSEL, len+1, len+1);
            delete[] fullStr;
        }
    }
}

void OutputDebugStringW95( LPCTSTR lpOutputString, ...)
{

    HANDLE heventDBWIN;  /* DBWIN32 synchronization object */
    HANDLE heventData;   /* data passing synch object */
    HANDLE hSharedFile;  /* memory mapped file shared data */
    LPSTR lpszSharedMem;
    int iWC;
    char achBuffer1[256];
    char achBuffer[256];

    /* create the output buffer */
    va_list args;
    va_start(args, lpOutputString);
    iWC = vsprintf(achBuffer1, lpOutputString, args);
    if (iWC >= 256) 
        vsprintf(achBuffer1, "%s", "Insufficient memory allocation in OutputDebugStrW95()\n");
    va_end(args);

    /* insert spaces for TRACEFN */
	static BOOL bStartNewLine = TRUE;
	char* nextline;
    iWC = 0;
    for (char* start=achBuffer1; *start; start=nextline+1) 
    {
		if (bStartNewLine) 
        {
			if ((afxTraceFlags & traceMultiApp) && (AfxGetApp() != NULL))
				iWC+=sprintf(&achBuffer[iWC], "%s: ", AfxGetApp()->m_pszExeName);
            for (int i=0; i<CTraceFn::nIndent; i++)
			    achBuffer[iWC++] = ' ';
            if (CTraceFn::nIndent>0) 
                achBuffer[iWC] = '\0';
			bStartNewLine = FALSE;
		}
		nextline = strchr(start, '\n');
		if (nextline) {
			*nextline = 0; // terminate string at newline
			bStartNewLine = TRUE;
		}
        iWC+=sprintf(&achBuffer[iWC], start);
		if (!nextline)
			break;
        iWC+=sprintf(&achBuffer[iWC], "\n");
	}

    /* 
        Do a regular OutputDebugString so that the output is 
        still seen in the debugger window if it exists.

        This ifdef is necessary to avoid infinite recursion 
        from the inclusion of W95TRACE.H
    */
#ifdef _UNICODE
    ::OutputDebugStringW(achBuffer);
#else
    ::OutputDebugStringA(achBuffer);
#endif

    /* bail if it's not Win95 */
    {
        OSVERSIONINFO VerInfo;
        VerInfo.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
        GetVersionEx(&VerInfo);
        if ( VerInfo.dwPlatformId != VER_PLATFORM_WIN32_WINDOWS )
            return;
    }

    /* make sure DBWIN is open and waiting */
    heventDBWIN = OpenEvent(EVENT_MODIFY_STATE, FALSE, "DBWIN_BUFFER_READY");
    if ( !heventDBWIN )
    {
        //MessageBox(NULL, "DBWIN_BUFFER_READY nonexistent", NULL, MB_OK);
        return;            
    }

    /* get a handle to the data synch object */
    heventData = OpenEvent(EVENT_MODIFY_STATE, FALSE, "DBWIN_DATA_READY");
    if ( !heventData )
    {
        // MessageBox(NULL, "DBWIN_DATA_READY nonexistent", NULL, MB_OK);
        CloseHandle(heventDBWIN);
        return;            
    }
    
    hSharedFile = CreateFileMapping((HANDLE)-1, NULL, PAGE_READWRITE, 0, 4096, "DBWIN_BUFFER");
    if (!hSharedFile) 
    {
        //MessageBox(NULL, "DebugTrace: Unable to create file mapping object DBWIN_BUFFER", "Error", MB_OK);
        CloseHandle(heventDBWIN);
        CloseHandle(heventData);
        return;
    }

    lpszSharedMem = (LPSTR)MapViewOfFile(hSharedFile, FILE_MAP_WRITE, 0, 0, 512);
    if (!lpszSharedMem) 
    {
        //MessageBox(NULL, "DebugTrace: Unable to map shared memory", "Error", MB_OK);
        CloseHandle(heventDBWIN);
        CloseHandle(heventData);
        return;
    }

    /* wait for buffer event */
    WaitForSingleObject(heventDBWIN, INFINITE);

    /* write it to the shared memory */
    *((LPDWORD)lpszSharedMem) = _getpid();
    wsprintf(lpszSharedMem + sizeof(DWORD), "%s", achBuffer);

    /* signal data ready event */
    SetEvent(heventData);

    /* clean up handles */
    CloseHandle(hSharedFile);
    CloseHandle(heventData);
    CloseHandle(heventDBWIN);

    return;
}

//////////////////
// Get window name in the form classname[HWND,title]
// Searches all the parents for a window with a title.
//
CString sDbgName(CWnd* pWnd)
{
	CString sTitle;
	HWND hwnd = pWnd->GetSafeHwnd();
	if (hwnd==NULL)
		sTitle = "NULL";
	else if (!::IsWindow(hwnd))
		sTitle = "[bad window]";
	else {
		sTitle = "[no title]";
		for (CWnd* pw = pWnd; pw; pw = pw->GetParent()) {
			if (pw->GetWindowTextLength() > 0) {
				pw->GetWindowText(sTitle);
				break;
			}
		}
	}
	CString s;
	s.Format("%s[0x%04x,\"%s\"]", 
		pWnd ? pWnd->GetRuntimeClass()->m_lpszClassName : "NULL",
		hwnd, (LPCTSTR)sTitle);
	return s;
}

struct {
	UINT		msg;
	LPCTSTR	name;
} MsgData[] = {
	{ WM_CREATE,_T("WM_CREATE") },
	{ WM_DESTROY,_T("WM_DESTROY") },
	{ WM_MOVE,_T("WM_MOVE") },
	{ WM_SIZE,_T("WM_SIZE") },
	{ WM_ACTIVATE,_T("WM_ACTIVATE") },
	{ WM_SETFOCUS,_T("WM_SETFOCUS") },
	{ WM_KILLFOCUS,_T("WM_KILLFOCUS") },
	{ WM_ENABLE,_T("WM_ENABLE") },
	{ WM_SETREDRAW,_T("WM_SETREDRAW") },
	{ WM_SETTEXT,_T("WM_SETTEXT") },
	{ WM_GETTEXT,_T("WM_GETTEXT") },
	{ WM_GETTEXTLENGTH,_T("WM_GETTEXTLENGTH") },
	{ WM_PAINT,_T("WM_PAINT") },
	{ WM_CLOSE,_T("WM_CLOSE") },
	{ WM_QUERYENDSESSION,_T("WM_QUERYENDSESSION") },
	{ WM_QUIT,_T("WM_QUIT") },
	{ WM_QUERYOPEN,_T("WM_QUERYOPEN") },
	{ WM_ERASEBKGND,_T("WM_ERASEBKGND") },
	{ WM_SYSCOLORCHANGE,_T("WM_SYSCOLORCHANGE") },
	{ WM_ENDSESSION,_T("WM_ENDSESSION") },
	{ WM_SHOWWINDOW,_T("WM_SHOWWINDOW") },
	{ WM_WININICHANGE,_T("WM_WININICHANGE") },
	{ WM_SETTINGCHANGE,_T("WM_SETTINGCHANGE") },
	{ WM_DEVMODECHANGE,_T("WM_DEVMODECHANGE") },
	{ WM_ACTIVATEAPP,_T("WM_ACTIVATEAPP") },
	{ WM_FONTCHANGE,_T("WM_FONTCHANGE") },
	{ WM_TIMECHANGE,_T("WM_TIMECHANGE") },
	{ WM_CANCELMODE,_T("WM_CANCELMODE") },
	{ WM_SETCURSOR,_T("WM_SETCURSOR") },
	{ WM_MOUSEACTIVATE,_T("WM_MOUSEACTIVATE") },
	{ WM_CHILDACTIVATE,_T("WM_CHILDACTIVATE") },
	{ WM_QUEUESYNC,_T("WM_QUEUESYNC") },
	{ WM_GETMINMAXINFO,_T("WM_GETMINMAXINFO") },
	{ WM_PAINTICON,_T("WM_PAINTICON") },
	{ WM_ICONERASEBKGND,_T("WM_ICONERASEBKGND") },
	{ WM_NEXTDLGCTL,_T("WM_NEXTDLGCTL") },
	{ WM_SPOOLERSTATUS,_T("WM_SPOOLERSTATUS") },
	{ WM_DRAWITEM,_T("WM_DRAWITEM") },
	{ WM_MEASUREITEM,_T("WM_MEASUREITEM") },
	{ WM_DELETEITEM,_T("WM_DELETEITEM") },
	{ WM_VKEYTOITEM,_T("WM_VKEYTOITEM") },
	{ WM_CHARTOITEM,_T("WM_CHARTOITEM") },
	{ WM_SETFONT,_T("WM_SETFONT") },
	{ WM_GETFONT,_T("WM_GETFONT") },