char and wchar_t

monkeycracks · Post by **monkeycracks** » Fri Sep 01, 2006 11:14 pm

struct EnumerationDataStruct
{
char Name[999];
};

Then later

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                    EnumerationDataStruct enumerationDataStruct;
                      IGUIEnvironment* guienv = device->getGUIEnvironment();
                      blah = enumerationDataStruct.Name;
                      guienv->,rect<int>(20,40,220,300),true,true,inftab);

75 C:\Documents and Settings\Zack\Desktop\dsf\gh\Game.h invalid conversion from `char*' to `wchar_t'

I can't seem to figure out how to solve this... Can someone post some code and not a 'Search the Forums noob' reply?

hybrid · Post by **hybrid** » Fri Sep 01, 2006 11:25 pm

Use wchar_t instead of char?!

monkeycracks · Post by **monkeycracks** » Sat Sep 02, 2006 12:43 am

Code: Select all

struct EnumerationDataStruct
{
wchar_t Name[999];
};

Code: Select all

                      EnumerationDataStruct enumerationDataStruct;
                      IGUIEnvironment* guienv = device->getGUIEnvironment();
                      wchar_t blah[999] = enumerationDataStruct.Name;
                      guienv->addStaticText(blah, rect<int>(20,40,220,300),true,true,inftab);

75 C:\Documents and Settings\Zack\Desktop\dsf\gh\Game.h invalid initializer

I've really got no clue what to do as of now

kompadre · Post by **kompadre** » Sat Sep 02, 2006 12:56 am

try this =)

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EnumerationDataStruct enumerationDataStruct;
IGUIEnvironment* guienv = device->getGUIEnvironment();
wchar_t blah[999]; 
wcscpy(blah, enumerationDataStruct.Name);
guienv->addStaticText(blah, rect<int>(20,40,220,300),true,true,inftab);

or even this

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EnumerationDataStruct enumerationDataStruct;
IGUIEnvironment* guienv = device->getGUIEnvironment();
guienv->addStaticText(enumerationDataStruct.Name, rect<int>(20,40,220,300),true,true,inftab);

P.S. Teh mistake trying to assign a value to a string array from another string array in C/C++ is quite common to programmers coming from scripting languages, you should learn some C++ (especially pointers and strings).

monkeycracks · Post by **monkeycracks** » Sat Sep 02, 2006 1:08 am

Both compile without error, yet when it initializes and you look at the tab with the information on it.

it comes up with some strange characters that look somewhat like C's and a square little box like when a language isn't supported.

I know its not the transfer from the server to the client being corrupted because I have it set to say what is received in the console.

Any idea? I'll tinker with it until then.

kompadre · Post by **kompadre** » Sat Sep 02, 2006 1:15 am

You're receiving char and not wide char (wchar_t) from server I guess. The trick to convert one to anoter for you would be something like

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char one[128];
wchar_t two[128];
swprintf(two, 128, "%hs", one);

You should do this when actually reading the string from server (filling the Name property of your structure).

krama757 · Post by **krama757** » Sat Sep 02, 2006 8:00 am

Cant you also use mbstowcs() ?

Perceval · Post by **Perceval** » Sat Sep 02, 2006 9:13 am

This question is frequently asked. May be that would be a good idea to include some very easy conversion's functions for strings in Irrlicht svn version?

hybrid · Post by **hybrid** » Sat Sep 02, 2006 10:33 am

Using stringc and stringw this shall be possible (although I have some doubts, because no such conversion methods are present, so I think this simply copies bytes).

benny53 · Post by **benny53** » Sat Sep 02, 2006 8:06 pm

or do something like this. First,you need a function to convert them,so this would be a function to do that:

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void StringToWide(wchar_t* pOutputString,char* pInputString){ 
     if(pOutputString && pInputString){ 
          std::size_t StringLength=strlen(pInputString); 
          for(std::size_t i=0;i<StringLength+1;i++){ 
               pOutputString[i]=static_cast<wchar_t>(pInputString[i]); 
          }
      }
}

then,to convert all you do is:

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char* me = "hello!"
wchar_t wText[512];
StringToWide(&wText[0],me);
device->setWindowCaption(me);

That should be all you need. So I hope that helps:)

and of course you'll have to use #include <iostream>

hybrid · Post by **hybrid** » Sat Sep 02, 2006 11:08 pm

Well, size_t and strlen should be included by <cstring> so no need for iostream. And static_cast from wchar_t to char will only work for ascii codes, just as the stringw/stringc part. All unicode features will definitely fail.