[fpc-pascal]File errors

Florian Klaempfl Florian.Klaempfl at gmx.de
Mon May 5 15:35:58 CEST 2003

James Mills wrote:
> 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... ]
>>>>>>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 ?

They do if you have the sysutils unit in your uses statement (sysutils 
converts rtes to exceptions).

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