Convert char * to wchar*

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4.00/5 (1 vote)

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I am trying to convert a string to a Unicode String

char *p="D:\";
const WCHAR *pwcsName;

Now I want convert p(char *) to pwcsName(WCHAR *).
Can anybody suggest me how do this?

Is it done using "mbtowc" function or MultiByteToWideChar...

plz can someone suggest me code for that?

Posted 23-Mar-11 2:00am

MartinTaylor

Updated 23-Mar-11 2:08am

Wendelius

v2

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3 solutions

Solution 3

If you are 100% sure your char* string is ASCII only, the fastest and easiest way to "widen" it would be something like:

std::wstring w;
std::copy(p, p + strlen(p), back_inserter(w));
const WCHAR *pwcsName = w.c_str();

Posted 23-Mar-11 5:22am

Nemanja Trifunovic

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CPallini · Accepted Answer · 2011-03-23T02:48:00

Solution 1

for instance, this way:

C++

  char *p="D:\\"; //just for proper syntax highlighting ..."
  const WCHAR *pwcsName;
  // required size
  int nChars = MultiByteToWideChar(CP_ACP, 0, p, -1, NULL, 0);
  // allocate it
  pwcsName = new WCHAR[nChars];
  MultiByteToWideChar(CP_ACP, 0, p, -1, (LPWSTR)pwcsName, nChars);
  // use it....
    
  // delete it
  delete [] pwcsName;
}

However, why don't you simply do

C++

const WCHAR *pwcsName = L"D:\\";

?

Posted 23-Mar-11 2:48am

CPallini

Updated 23-Mar-11 2:49am

v2

Comments

Olivier Levrey 23-Mar-11 8:49am

Voted 5.

CPallini 23-Mar-11 8:50am

Thanks

MartinTaylor 23-Mar-11 8:54am

Thank u.. I'll try it

the reason im not using -> const WCHAR *pwcsName = L"D:\\";
is that i'm retrieving string "D:\\" in some variable and them assigning it to
const WCHAR *pwcsName

CPallini 23-Mar-11 10:10am

If you're using MFC or ATL, have a look at 'ATL and MFC String Conversion Macros': http://msdn.microsoft.com/en-us/library/87zae4a3.aspx

Kurt Degiorgio · Accepted Answer · 2011-03-23T02:53:00

Solution 2

To Convert to unicode you need to use the following function:

MultiByteToWideChar -->

http://msdn.microsoft.com/en-us/library/dd319072(v=vs.85).aspx[^]

example of MultiByteToWideChar:

MultiByteToWideChar(CP_UTF8, 0, buf, -1 , NULL, 0);

Posted 23-Mar-11 2:53am

Kurt Degiorgio

Updated 23-Mar-11 2:56am

v2