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In article <9012101903.AA146539@vttcf.cc.vt.edu> fmcphers@VTTCF.CC.VT.EDU (Frank McPherson) writes:
>
>I'm trying to play around with windows and such.  I've encountered an error
>I can't figure out.
>
>#include <exec/types.h>             
>#include <intuition/intuition.h>    
>struct IntuitionBase *IntuitionBase;
>void OpenLibrary();                            
>if (!(IntuitionBase = (struct IntuitionBase *) 
>   OpenLibrary("intuition.library")))            
> {                                             
> printf("Could not open intuition.library.\n");
> close_junk();                                 
> exit(FALSE);                                  
> }

>This ain't working.  Manx 5.0d tells me that there's an invalid type conversion
>in the if statement, right on the second close paren after the actual 
>OpenLibrary() call.  I thought maybe it was that I was passing it an old 
>version number (I was passing 0L as the version number right after the first
>arguement), but taking it out didn't make a bit of difference.  What am I 
>missing?
>Thanks,

You're missing the version number, as you mentioned, and the file
"functions.h" which tells the compiler a lot of things it needs to be
happy. This works:

#include<exec/types.h>
#include<intuition/intuition.h>
#include<functions.h>           /* Manx smiles on this file :) */

struct IntuitionBase *IntuitionBase ;

void main(void)
{
	if(IntuitionBase = OpenLibrary("intuition.library", 0L ))
	{
		printf("success\n") ;
		CloseLibrary( IntuitionBase ) ;
	}
	else
	{
		printf("failure\n") ;
	}
}

bj
		
>-- Frank McPherson                  INTERNET: fmcphers@vttcf.cc.vt.edu --

 -----------------------------------------------------------------------
 | Brian Jackson  Software Engineer, Commodore-Amiga Inc.  GEmie: B.J. |
 | bj@cbmvax.cbm.commodore.com    or  ...{uunet|rutgers}!cbmvax!bj     |
 |---------------------------------------------------------------------|

In article <9012101903.AA146539@vttcf.cc.vt.edu> fmcphers@VTTCF.CC.VT.EDU (Frank McPherson) writes:

> I'm trying to play around with windows and such.  I've encountered an error
> I can't figure out.  Here is the stuff:

> [...]
> void OpenLibrary();                            
  ^^^^
> if (!(IntuitionBase = (struct IntuitionBase *) 
>    OpenLibrary("intuition.library")))          
> [...]

> Manx 5.0d tells me that there's an invalid type conversion
> in the if statement, right on the second close paren after the actual 
> OpenLibrary() call.

You're declaring OpenLibrary() as void, then using its return value--strictly
a no-no.  It should be declared as struct Library *OpenLibrary().  Also, you
should put the 0L back in the call to OpenLibrary.


nj

In article <NJ.90Dec10213112@magnolia.Berkeley.EDU> nj@magnolia.Berkeley.EDU (Narciso Jaramillo) writes:
>In article <9012101903.AA146539@vttcf.cc.vt.edu> fmcphers@VTTCF.CC.VT.EDU (Frank McPherson) writes:
>
>> [...]
>> void OpenLibrary();                            
>  ^^^^
>> if (!(IntuitionBase = (struct IntuitionBase *) 
>>    OpenLibrary("intuition.library")))          
>> [...]
>
>> Manx 5.0d tells me that there's an invalid type conversion
>> in the if statement, right on the second close paren after the actual 
>> OpenLibrary() call.
>
>You're declaring OpenLibrary() as void, then using its return value--strictly
>a no-no.  It should be declared as struct Library *OpenLibrary().  Also, you
>should put the 0L back in the call to OpenLibrary.
>
Well, yes and no. It should be

void *OpenLibrary() ;   /* a pointer to void */

This is ok as void pointers can be cast to/from other types (see page
199 of the ANSI K&R)
 
Manx 5.0 now defaults to 32-bits so the 0L is not required any more
(though still a good idea) - a simple '0' will do.

bj

>nj

 -----------------------------------------------------------------------
 | Brian Jackson  Software Engineer, Commodore-Amiga Inc.  GEnie: B.J. |
 | bj@cbmvax.cbm.commodore.com    or  ...{uunet|rutgers}!cbmvax!bj     |
 -----------------------------------------------------------------------

> void OpenLibrary();                            
  ^^^^ Umm, you definitely mean void *, or struct Library *, here.
                                               
> if (!(IntuitionBase = (struct IntuitionBase *) 
>    OpenLibrary("intuition.library")))          

> This ain't working.  Manx 5.0d tells me that there's an invalid type
> conversion
> in the if statement, right on the second close paren after the actual 
> OpenLibrary() call.  I thought maybe it was that I was passing it an old 
> version number (I was passing 0L as the version number right after the first
> arguement), but taking it out didn't make a bit of difference.  What am I 
> missing?

See above.

> Thanks,

You're welcome.

> -- Frank McPherson                  INTERNET: fmcphers@vttcf.cc.vt.edu --

				Ross Cunniff
				Hewlett-Packard Colorado Language Lab
				cunniff@hpfcla.HP.COM

Folks: I had problems with this too.
Try OpenLibrary((UBYTE *)"foo.library"...)
The UBYTE * is an incompetence added by Manx. They insist that they have
to use special typedef'd names for all the data types. Note that the
library source for 5.0d won't even come *close* to compiling under 2.0.
anyway, strings are now unsigned char *'s... At least, that's the change
I always have to make to get the *#@!@$ compiler to shut up.
Anyone got a port of gcc? It would be so much easier... *grin*

--SeebS--