Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!ames!sun-barr!decwrl!wsl.dec.com!mikey
From: mikey@wsl.dec.com (Mike Yang)
Newsgroups: comp.windows.x
Subject: Re: bug in XtGetApplicationResources
Keywords: incorrect parsing of resources on sun 4
Message-ID: <3003@bacchus.dec.com>
Date: 13 Mar 90 01:04:54 GMT
References: <5061@helios.ee.lbl.gov> <5062@helios.ee.lbl.gov>
Sender: news@decwrl.dec.com
Reply-To: mikey@wsl.dec.com
Organization: DEC Western Software Laboratory
Lines: 32


In article <5062@helios.ee.lbl.gov>, envbvs@epb2.lbl.gov (Brian V.
Smith) writes:
> Why does it matter if the variable has a non-zero value to start?
> Again, this is only a problem on a sun4 (running sunos4.0) and not
> a problem on a Vaxstation (Ultrix 3.0) or DECstation 3100 (Ultrix 3.0)
> 
> ...
>
> static XtResource application_resources[] = {
>         {XtNjustify, XtCJustify, XtRBoolean, sizeof(int),
>                  (Cardinal)&RHS_PANEL, XtRBoolean, (caddr_t)&false},
>         {"landscape", XtCOrientation, XtRBoolean, sizeof(int),
>                  (Cardinal)&landscape, XtRBoolean, (caddr_t)&true},
> };

From the Intrinsics manual, "The resource_size field is the size of
the physical representation in bytes; you should specify it as
"sizeof(type)" so that the compiler fills in the value."

Therefore, you should instead have:

         {"landscape", XtCOrientation, XtRBoolean, sizeof(Boolean),
                  (Cardinal)&landscape, XtRBoolean, (caddr_t)&true},

The difference in sizes between Boolean, typedef'd to char, and int
varies among machines and this probably made things work under Ultrix
but not on your Sun.

-----------------------------------------------------------------------------
Mike Yang	   Western Software Laboratory	Digital Equipment Corporation
mikey@wsl.dec.com	  decwrl!mikey			 415/853-6677