[fpc-pascal]File errors

[James Mills]

On Mon, May 05, 2003 at 02:18:27PM +0200, Marco van de Voort wrote:
> > On Mon, May 05, 2003 at 01:36:41PM +0200, Marco van de Voort wrote:
> > > [ Charset ISO-8859-1 unsupported, converting... ]
> > > > > Hi,
> > > > >
> > > > > How do you check for file errors such as "Disk Full" before attempting
> > > > > to write out a file to disk ?
> > > > > You can easily check if a file exists with the fileExists function...
> > > > > Can something similar be done for other file errors ?
> > > > 
> > > > You can check with diskfree() how much space is left on a disk
> > > 
> > > Can be dangerous in multi tasking and/or multi user system. Also that
> > > doesn't keep track of e.g. the reserved rootspace on unix.
> > > 
> > > Best way is to check ioresult after writing each block to see if it is zero?
> > 
> > Or use a try except ?
> 
> Standard fileoperations don't raise exceptions. That is for higher level
> constructs (like FCL file streams). 
> 
> If basic block I/O would use exceptions, that would make it slow.

Then why did Jilani Khaldi suggest using exceptions ?

cheers
James

> _______________________________________________
> fpc-pascal maillist  -  fpc-pascal at lists.freepascal.org
> http://lists.freepascal.org/mailman/listinfo/fpc-pascal