What is the simplest way to convert char[] to/from tchar[] in C/C++(ms)?

Question

This seems like a pretty softball question, but I always have a hard time looking up this function because there seem there are so many variations regarding the referencing of char and tchar.

Answer 1

TCHAR is a Microsoft-specific typedef for either char or wchar_t (a wide character).

Conversion to char depends on which of these it actually is. If TCHAR is actually a char, then you can do a simple cast, but if it is truly a wchar_t, you'll need a routine to convert between character sets. See the function MultiByteToWideChar()

Answer 2

MultiByteToWideChar but also see "A few of the gotchas of MultiByteToWideChar".

Answer 3

There are a few answers in this post as well, especially if you're looking for a cross-platform solution:

http://stackoverflow.com/questions/148403/utf8-tofrom-wide-char-conversion-in-stl

Answer 4

The simplest way is to use the conversion macros:

• CW2A
• CA2W
• etc...

MSDN

Answer 5

Although in this particular situation I think the TChar is a wide character I'll only need to do the conversion if it isn't. which I gotta check somehow.

if (sizeof(TCHAR) != sizeof(wchar_t))
{  .... }

The cool thing about that is both sizes of the equals are constants, which means that the compiler will handle (and remove) the if(), and if they are equal, remove everything inside the braces

Answer 6

Here is the CPP code that duplicates _TCHAR * argv[] to char * argn[].

http://www.wincli.com/?p=72

If you adopting old code to Windows, simple use define mentioned in the code as optional.