#include <Shlwapi.h>
#pragma comment (lib , "shlwapi.lib" )

#define nullptr NULL

inline BYTE toHex(const BYTE &x)
{
       return x > 9 ? x + 55: x + 48;
}

inline CString UrlEncode(CString sIn)
{
       CString sOut;
       const int nLen = sIn.GetLength() + 1;
       register LPBYTE pOutTmp = NULL;
       LPBYTE pOutBuf = NULL;
       register LPBYTE pInTmp = NULL;
       LPBYTE pInBuf =(LPBYTE)sIn.GetBuffer(nLen);
       BYTE b = 0;

       //alloc out buffer
       pOutBuf = (LPBYTE)sOut.GetBuffer(nLen*3 - 2);//new BYTE [nLen * 3];

       if(pOutBuf)
       {
              pInTmp = pInBuf;
              pOutTmp = pOutBuf;

              // do encoding
              while (*pInTmp)
              {
                     if(isalnum(*pInTmp))
                           *pOutTmp++ = *pInTmp;
                     else
                           if(isspace(*pInTmp))
                                  *pOutTmp++ = '+';
                           else
                           {
                                  *pOutTmp++ = '%';
                                  *pOutTmp++ = toHex(*pInTmp>>4);
                                  *pOutTmp++ = toHex(*pInTmp%16);
                           }
                           pInTmp++;
              }
              *pOutTmp = '\0';
              //sOut=pOutBuf;
              //delete [] pOutBuf;
              sOut.ReleaseBuffer();
       }
       sIn.ReleaseBuffer();
       return sOut;
}

inline int SplitString(CString & str, TCHAR cTok, CStringArray& aryItem)
{
       TCHAR* p = str.GetBuffer(0);
       TCHAR* e = p;
       TCHAR cEnd = *e;
       int nCount = 0;
       while (cEnd)
       {
              if (*e == _T('\0'))
                     cEnd = *e;
              else if (*e == cTok)
                     *e = _T('\0');

              if (*e)
                     e++;
              else
              {
                     if (*p != _T('\0'))
                     {
                           aryItem.Add(p);
                           nCount++;
                     }
                     p = ++e;
              }
       }
       return nCount;
}

inline void MakeSureCreateDir(CString basePath, CString path)
{
       CStringArray arr;
       SplitString(path, '\\', arr);
       for (int i = 0; i < arr.GetCount(); i++)
       {
              basePath += L"\\" + arr[i];

              if (!PathFileExists(basePath))
                     ::CreateDirectory(basePath, NULL);
       }
}