stack corrupted around the variable

[PavanGupta]

hi,
i m using VC++8.0 MFC. i m facing the problem atack corrupt around the variable stCmosPortInput.
i am reading some information from ini file.information is as following format.

//Setting_1 = Floppy Drive Type,0x71,0x10,0x03,0x40;

for each comma serated information i am filling structure.

code for reading ini fileis as follows.

FILE    *pDefinitionFile;
    CString szTempMsg = _T("");
    CString szErrMsg = _T("");
    //IOREGSETINPUT    stIORegSetInput = {0};
    CMOSPORTINPUT    stCmosPortInput = {0};
 
    int nIndex = 0;        // index of searched string
    int nCount = 0;        //no. of entries in structure.
    int nNoOfBiosSettings = 0;
 
    CHAR szDefinitionFile[MAX_PATH] = {0};    
    CHAR szTempFileBuffer[256] = {0};
 
    CString szFileData = _T("");    
    CString szBiosSettings = _T("");    
    CString szBiosSettingName = _T("");
    CString szIOPort = _T("");            
    CString szOffSet = _T("");            
    CString szMaskValue = _T("");        
    CString szExpectedValue = _T("");    
    CString szTempSettings = _T("");  
 
    m_listBiosSettings.RemoveAll();
 
 
    PerformMessageLogging("Getting values from INI file");
    ZeroMemory(szDefinitionFile,sizeof(szDefinitionFile));
    GetCurrentDirectory(MAX_PATH,szDefinitionFile);
 
    szDefinitionFile[lstrlen(szDefinitionFile)-3] = 'e';
    szDefinitionFile[lstrlen(szDefinitionFile)-2] = 'n';
    szDefinitionFile[lstrlen(szDefinitionFile)-1] = 'v';
    szDefinitionFile[lstrlen(szDefinitionFile)] = '\\';
    szDefinitionFile[lstrlen(szDefinitionFile)] = '\0';
 
    strcat_s(szDefinitionFile,INI_FILE_NAME);
    errno_t fileErr;
    fileErr = fopen_s(&pDefinitionFile, szDefinitionFile, "r");
    if(fileErr != 0)
    {
        szTempMsg.LoadString(IDS_ERR_INIFILE);
        szErrMsg.Format(szTempMsg,szDefinitionFile);
 
        ErrorAndTraceHandler(SOFTWARE_ERR,
                                    FALSE,
                                    IDS_FUN_READINIFILE,
                                    OCR_FILE_ERROR,
                                    IDS_API_FOPEN,
                                    IDS_ERR_INIFILE,
                                    fileErr);
 
    }
 
    while(TRUE)
    {
    if(fgets(szTempFileBuffer,sizeof szTempFileBuffer),pDefinitionFile)!= NULL)
    {
 
    szFileData = szTempFileBuffer;
 
    if(szFileData.Left(1) == "#")
    {
    continue;
                }
    //e.g. if BIOS setting given in ini file is as following 
    //Setting_1 = Floppy Drive Type,0x71,0x10,0x03,0x40;
 
    PerformMessageLogging(szFileData);
    nNoOfBiosSettings++;
    CString csTemp = _T("");
    nIndex = szFileData.ReverseFind('=');
    szBiosSettings = szFileData.Mid(nIndex+1);
    nIndex = szBiosSettings.Find(";");
    csTemp = szBiosSettings.Left(nIndex);
 
    m_csArrIniFileData.Add(csTemp);
    PerformMessageLogging(csTemp);
 
    nIndex = 0;
    szBiosSettingName = _T("");
    nIndex = szBiosSettings.Find(',',0);
    szBiosSettingName = szBiosSettings.Left(nIndex);
    stCmosPortInput.szSettingName = szBiosSettingName;
 
    PerformMessageLogging(szBiosSettingName);
    // separate string after occurence of first ','
    szTempSettings = szBiosSettings.Mid(nIndex+1);
    // Read I/O Port before second comma
    CString szTemp = _T("");
    LPTSTR BiosTMP = NULL;
    nIndex = 0;
 
    nIndex = szTempSettings.Find(',',0);
    szIOPort = szTempSettings.Left(nIndex);
    BiosTMP = szIOPort.GetBuffer(szIOPort.GetLength()+1);
        szIOPort.ReleaseBuffer();
            //Store hexadecimal value into decimal format
            //sscanf_s(BiosTMP, "%i", &(stCmosPortInput.ucReadPortAddr));
            sscanf_s(BiosTMP, "%x", &(stCmosPortInput.ucReadPortAddr));
 
            csTemp.Format("I/O PortAddress in decimal format = %u",stCmosPortInput.ucReadPortAddr);
            PerformMessageLogging(csTemp);
 
 
 
            // Separate string after occurence of second ','
            szTemp = szTempSettings.Mid(nIndex+1);
 
            //Read Offset of setting before third comma
            nIndex = 0;
            BiosTMP = NULL;
            nIndex = szTemp.Find(',',0);
            szOffSet = szTemp.Left(nIndex);
            BiosTMP = szOffSet.GetBuffer(szOffSet.GetLength()+1);
            szOffSet.ReleaseBuffer();
            //sscanf_s(BiosTMP, "%i", &(stCmosPortInput.ucOffset));
            sscanf_s(BiosTMP, "%x", &(stCmosPortInput.ucOffset));
 
            csTemp = _T("");
            csTemp.Format("Offset = %u",stCmosPortInput.ucOffset);
            PerformMessageLogging(csTemp);
 
            // Separate string after occurence of third ','
            szTempSettings = _T("");
            szTempSettings = szTemp.Mid(nIndex+1);
 
            // Read Mask Value before fourth comma
            nIndex = 0;
            BiosTMP = NULL;
            nIndex = szTempSettings.Find(',',0);
            szMaskValue = szTempSettings.Left(nIndex);
            BiosTMP = szMaskValue.GetBuffer(szMaskValue.GetLength()+1);
            szMaskValue.ReleaseBuffer();
            //sscanf_s(BiosTMP, "%i", &(stCmosPortInput.ucMaskValue));
            sscanf_s(BiosTMP, "%x", &(stCmosPortInput.ucMaskValue));
 
            csTemp =_T("");
            csTemp.Format("Mask Value = %u",stCmosPortInput.ucMaskValue);
            PerformMessageLogging(csTemp);
 
            // Separate string after occurence of Fourth ','
            szTemp = _T("");
            szTemp = szTempSettings.Mid(nIndex+1);
 
            // Read Expected Value before ;
            nIndex = 0;
            BiosTMP = NULL;
            nIndex = szTemp.ReverseFind(';');
            szExpectedValue = szTemp.Mid(0,nIndex);
            BiosTMP = szExpectedValue.GetBuffer(szExpectedValue.GetLength()+1);
            szExpectedValue.ReleaseBuffer();
            //sscanf_s(BiosTMP, "%i", &(stCmosPortInput.ucExpectedValue));
            sscanf_s(BiosTMP, "%x", &(stCmosPortInput.ucExpectedValue));
 
            csTemp =_T("");
            csTemp.Format("Expected Value = %u",stCmosPortInput.ucExpectedValue);
            PerformMessageLogging(csTemp);
            //PerformMessageLogging("end of setting");
 
            m_listBiosSettings.AddTail(stCmosPortInput);
            //AddDataToList(&stCmosPortInput);
            //nCount++;
        }
        else
        {
            m_nSettingCount = nNoOfBiosSettings;
            break;
        }
    }
    fclose(pDefinitionFile);
    PerformMessageLogging("Values extracted from INI file");
 
    if(m_nSettingCount == 0)
    {
        PerformMessageLogging("BIOS settings not found in INI file");
        //szErrMsg.Format("%s",INI_FILE_NAME);
 
        ErrorAndTraceHandler(COMMON_ERR,
                                    FALSE,
                                    IDS_FUN_READINIFILE,
                                    OCR_FILE_ERROR,
                                    0,
                                    IDS_ERR_NOSETTING,
                                    0);
 
    }