[C++] Functions to Convert from string to wchar_t to char

[lug]

Here's a couple of functions that I had to research for the irrPreSettings project. Basically, the first one converts a string to wchar_t:

Code: Select all

    wchar_t stringToWchart(const std::string value)
    {
        // value to hold converted string
        c8 char_value[64];

        // convert from string to char
        strcpy_s(char_value,
                 std::strlen(value.c_str()) + 1,
                 value.c_str());

        // filled with number of characters converted
        size_t num_of_converted_wchars = 0;

        // value to hold converted wchar_t
        wchar_t wchar_value[64];

        // convert from char* to wchar_t*
        mbstowcs_s(&num_of_converted_wchars,
                   wchar_value,
                   std::strlen(char_value) + 1,
                   char_value,
                   _TRUNCATE);

        // return value
        return *wchar_value;
    }

The second one converts from wchar_t to char:

Code: Select all

    c8 wchartToChar(const wchar_t* value)
    {
        // convert from wchar_t* to char*
        size_t convertedChars = 0;

        // value to hold converted wchar
        c8 char_value[64];

        // convert from wchar_t* to char*
        wcstombs_s(&convertedChars,
                   char_value,
                   std::wcslen(value) + 1,
                   value,
                   _TRUNCATE);

        // return converted char
        return *char_value;
    }

I ended up not using either one though with the project updated to v1.2 of irrlicht. Anyway, I hope it's useful to somebody.

[miko93]

...
Anyway, I hope it's useful to somebody.

It is, Sir, it is. Thx.

[noreg]

Couldn't that solve my problem here ?
http://irrlicht.sourceforge.net/phpBB2/ ... scapemaker
Looks like the errors are in the conversion of the said functions.

[hybrid]

No, your problems are related to a change in the Irrlicht API which you have to adpat in the new scene nodes. There is no need for transformation methods.

[noreg]

Thanks Hybrid. And if i didn't crosspost you even helped by mentioning the API-changes. How do i find out ?

[hybrid]

Now, the problems are because you pass a wchar_t* to a function expecting char*. Irrlicht used wchar_t* to name scene nodes, but (I think since 1.0) uses char* because these names are internal anyway and so eveeryone can use plain chars. So you have to change these names all the way and convert all variables and constants used from using wchar_t to using char. This should be possible statically, i.e. directly in the program code, no need to make it during run-time.
The problematic methids are presented to you by the compiler, it's basically setName for all scene nodes.

[maitrelame2]

That's great !

But can you tell me how to convert a char to wchar_t ?

THX

[BlindSide]

This is what I do for both:

wchar_t to char:

stringc charconvert = (my wchar)

charconvert.c_str();

char to wchar_t:

stringw charconvert = (my char)

charconvert.c_str();

[maitrelame2]

Excuse me but what is the mame of the output of the fonction for wchar_t to char ?

How do I get the name to send it with winsock ?

THX