dolfin team mailing list archive

[Alexander Jarosch <alexanj@xxxxx>]

Yes I read from the file I previously wrote like:

 File meshout("outmesh.xml");
 meshout << mesh;

 Mesh mesh2;
 File meshin("outmesh.xml");
 meshin >> mesh2;

I was just testing the io in one run, should be possible in principle, 
right. but not if the object has to be destroyed to write everything. A 
similar example of mesh io is in the user manual. but I know, it's 
always hard to keep up the documentation :-), but the mailing list is 
great, good response if one is developing something with dolfin.

Alex

Anders Logg wrote:

> Yes of course, together with a thousand other things we also need to
> document... :-)
>
> How did you manage to not have the object destroyed? Are you reading
> from the same file object that you previously wrote to, or opening the
> same file twice, once for writing and then for reading, with the first
> object still existing when the second is opened?
>
> /Anders
>
>
> On Fri, Feb 24, 2006 at 12:56:58PM +0000, Alexander Jarosch wrote:
>  
>
> > Okay fine, thanks, maybe this should find it's way into the user manual 
> > of dolfin.
> >
> > Alex
> >
> > Johan Jansson wrote:
> >
> >    
> >
> > > On Fri, Feb 24, 2006 at 12:28:13PM +0000, Alexander Jarosch wrote:
> > >
> > >
> > >      
> > >
> > > > I just want to report a bug in XMLFile.cpp. no matter what type of data 
> > > > I write to a xml file, vector, matrix, Function, it will not close the 
> > > > file with the needed </dolfin>.
> > > >
> > > > So upon readin of any xml file, mesh included, dolfin fails because it 
> > > > does not find the end of the file.
> > > > I did not look deeply into that just made a quick hack so I can work. I 
> > > > added the writeFooter(); into each write out section, but now I get a 
> > > > double </dolfin> at the end.
> > > >
> > > > Alex
> > > >
> > > >  
> > > >
> > > >        
> > > Hi!
> > >
> > > The footer is written in the destructor of XMLFile, so it should
> > > always be written unless you manage to avoid destroying the file
> > > object.
> > >
> > > The reason the footer is not written out in each write operation is
> > > that you might want to write several objects to the same file, a mesh
> > > and a vector for example. Currently, the only way DOLFIN can tell that
> > > a user has finished writing is at the destructor.
> > >
> > > Johan
> > >
> > >
> > > _______________________________________________
> > > DOLFIN-dev mailing list
> > > DOLFIN-dev@xxxxxxxxxx
> > > http://www.fenics.org/cgi-bin/mailman/listinfo/dolfin-dev
> > >
> > >
> > >
> > >      
> >    
>
>  


--
Alexander H. Jarosch

Jarðvísindastofnun Háskólans
Institute of Earth Sciences, University of Iceland
Náttúrufræðahús, Askja
Building of Natural Sciences, Askja
Sturlugata 7
IS - 101 Reykjavík
Iceland

Tel.: +354 525 4906
http://raunvis.hi.is/~jarosch/