C / C++ / MFC

Rajesh_Parameswaran wrote:

buff = strTemp.GetBuffer(strTemp.GetLength());

Mark Salsbery
Microsoft MVP - Visual C++

   TCHAR buff[512]={NULL};
   char tempBuff[512]={NULL};

   _stprintf(buff, _T("Hello World"));

   strcpy(tempBuff, CT2CA(buff));

Mark Salsbery
Microsoft MVP - Visual C++

CString s = _T("Hello world!");
const char* p = T2CA(LPCTSTR(s));

--Mike--
Visual C++ MVP
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Hungarian notation FTW

   char buff[80];
   strcpy(buff, CT2CA(_T("Hello World")));

   CString s = _T("Hello world!");
   const char* p = CT2CA(LPCTSTR(s));
   // p is invalid here

// Example 3
// Incorrect use of conversion macros.

void ExampleFunctionW( LPCWSTR pszW )

{
 // Create a temporary instance of CW2A,
  
 // save a pointer to it and then delete
 // the temportary instance.
   
 LPCSTR pszA = CW2A( pszW );
 // The pszA in the following line is an invalid pointer,
 // as the instance of CW2A has gone out of scope.
 ExampleFunctionA( pszA );

}

Mark Salsbery
Microsoft MVP - Visual C++

USES_CONVERSION;
CString s = _T("Hello world!");
const char* p = T2CA(LPCTSTR(s));
// p is ok to use until the end of the function!  Yay!

USES_CONVERSION;
CString s = _T("Hello world!");
const char* p1 = CT2CA(LPCTSTR(s));
// p1 BAD!
const char* p2 = T2CA(LPCTSTR(s));
// p2 GOOD!

Mark Salsbery
Microsoft MVP - Visual C++

<br />
// returns number of TCHARs in string<br />
int wstrlen(_TCHAR * wstr)<br />
{<br />
    int l_idx = 0;<br />
    while (((char*)wstr)[l_idx]!=0) l_idx+=2;<br />
    return l_idx;<br />
}<br />
 <br />
// Allocate char string and copy TCHAR->char->string<br />
// Don't forget to release the allocated memory!!!<br />
char * wstrdup(_TCHAR * wSrc)<br />
{<br />
    int l_idx=0;<br />
    int l_len = wstrlen(wSrc);<br />
    char * l_nstr = (char*)malloc(l_len);<br />
    if (l_nstr) {<br />
        do {<br />
           l_nstr[l_idx] = (char)wSrc[l_idx];<br />
           l_idx++;<br />
        } while ((char)wSrc[l_idx]!=0);<br />
    }<br />
    nstr[l_idx] = 0;<br />
    return l_nstr;<br />
}<br />

Vaclav_Sal wrote:

Never mind - my own stupidity is the source of this "problem"