Check whether a file exist

//Check whether a file exist
//Portable to linux


#include <sys/stat.h>
#include <string>
using namespace std;

bool FileExists(string strFilename)
{
     struct stat stFileInfo;
     bool blnReturn= false;
     int intStat=-1;
     // Attempt to get the file attributes
     intStat = stat(strFilename.c_str(),&stFileInfo);
     if(intStat == 0)
     {
          // We were able to get the file attributes
          blnReturn = true;
     }
     else
     {
          // We were not able to get the file attributes. 
          blnReturn = false;
     } 
     return blnReturn;
}

Code to Create a file, If file exist already append a GUID with that file and write the content




#pragma comment (lib, "Rpcrt4.lib")

CString GetUniqueGUID( )
{
HRESULT hr = NULL;
CString sUUID(_T(""));
UUID *pUUID = NULL;
BOOL bAllocated = FALSE;
unsigned char *sTemp = NULL;

if (pUUID == NULL)
{
pUUID = new UUID;
bAllocated = TRUE;
}

if (pUUID != NULL)
{
hr = UuidCreate( pUUID );
if (hr == RPC_S_OK)
{
hr = UuidToString(pUUID, &sTemp);
if (hr == RPC_S_OK)
{
sUUID = sTemp;
sUUID.MakeUpper();
RpcStringFree(&sTemp);
}
}
if (bAllocated)
{
delete pUUID;
pUUID = NULL;
}
}
return sUUID;
}


void CreateFileWithoutReplacingExisting(CString & csFileName , CString & csContent )
{

CFileStatus cf;
if(CFile::GetStatus(csFileName,cf)) // File Exist 
{
    CString csExt ;
    CString csGUID=GetUniqueGUID();
    csGUID = "_"+csGUID;
    int nPos = csFileName.ReverseFind('.');
    if(nPos > -1 )
    {
         csExt = csFileName.Mid(nPos);
         csFileName = csFileName.Left(nPos);
         csFileName = csFileName+csGUID+"."+csExt;
    }
}
    CreateFile(csFileName,csContent);

}


int CreateFile(LPCTSTR lpcFileName, LPCTSTR lpcText)
{
    if( !lpcFileName || lpcFileName[0]=='\0' )
    {
         return -1;
    }
    if(!lpcText || lpcText[0]=='\0') return -1;   

    CFile cf;
    CFileException cfe;

    try
    {
         if(!cf.Open(lpcFileName,CFile::modeCreate|CFile::modeWrite|CFile::shareDenyWrite, &cfe))
         {
              return 0;
         }
       
         cf.Write(lpcText, lstrlen(lpcText) );
         cf.Close();
    }
    catch(CFileException *ce)
    {
         ce->Delete();
         cf.Close();        
         return -1;
    }   
    return 1;
}