Как настроить кодировку для Windows

            swprintf(buf, wcslen(texpath) + wcslen(d_name), L"%ls%ls", wtexpath, d_name);

WideCharToMultiByte(CP_UTF8, 0, d_name, wcslen(d_name), tmptexturepack.name, wcslen(d_name), NULL, NULL);

#ifdef _WIN32
    int tpl = MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS, texpath, -1, NULL, 0);
    wchar_t *wtexpath = calloc(tpl + 1, sizeof(wchar_t));
    MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS, texpath, -1, wtexpath, tpl);
 
    _WDIR *wtexdir = _wopendir(wtexpath);
    struct _wdirent *wtexdirent;
 
    while(wtexdirent = _wreaddir(wtexdir))
    {
        wchar_t *d_name = wtexdirent->d_name;
        if(!wcscmp(d_name, L"empty.png"))
            emptyexists = 1;
        if(wcscmp(d_name, L".") && wcscmp(d_name, L"..")) // Skip virtual dirs
        {
            wchar_t *buf = calloc(wcslen(wtexpath) + wcslen(d_name) + 1, sizeof(wchar_t));
            printf("1 - Alive!\n");
            swprintf(buf, wcslen(wtexpath) + wcslen(d_name), L"%ls%ls", wtexpath, d_name);
            printf("2 - Alive!\n");
            _WDIR *wtmpdir = _wopendir(buf);
            if(wtmpdir)
            {
                Texturepack tmptexturepack;
                tmptexturepack.name = calloc(wcslen(d_name), sizeof(char));
                WideCharToMultiByte(CP_UTF8, 0, d_name, wcslen(d_name), tmptexturepack.name, wcslen(d_name), NULL, NULL);
                AddTexturepackToList(cont->texturepackList, tmptexturepack);
                logWriteWithPrefix("Found texturepack", d_name);
                if(!strcmp(tmptexturepack.name, "Default")) // If it's name is "Default"
                {
                    deffound = cont->texturepackList->size;
                    logWrite(" > Default texturepack");
                }
                if(!strcmp(tmptexturepack.name, cont->texturepackName)) // If it's name is simillar to previous selected
                {
                    selfound = 1;
                    cont->texturepackId = cont->texturepackList->size;
                    logWrite(" > Selected texturepack");
                }
            }
            _wclosedir(wtmpdir);
            free(buf);
            buf = NULL;
        }
    }
    _wclosedir(wtexdir);
#else

wcscat(buf, wtexpath);
wcscat(buf, d_name);