Richard Gaskin wrote:
That looks similar to what I posted here on the 9th:
open file tFile for update
seek relative -1000 in file tFile
repeat
read from file tFile until cr
if it is not empty then
put it after tBuffer
else
delete last line of tBuffer
write tBuffer to file tFile
end if
end repeat
close file tFile
Does that not do what you need?
No, it doesn't. If a file is opened for 'update' then any write to the
file simply overwrites any existing characters at the appropriates
position(s), and leaves everything following that unchanged. There is no
EOF implied by a write in update mode. There is an EOF inserted after a
write if the file is opened in 'append' mode - but then you cannot read
from it.
(Actually, there is another additional reason - each time you do a
'read' that updates the file pointer, so the subsequent write would
begin at the file position immediately *after* the last read, not where
the read had been done from; you would have needed another seek before
write (or do a 'write at x') to have a chance, but you'd still need Rev
to provide access to truncate() after your write.)
-- Alex.
_______________________________________________
use-revolution mailing list
use-revolution@lists.runrev.com
Please visit this url to subscribe, unsubscribe and manage your subscription
preferences:
http://lists.runrev.com/mailman/listinfo/use-revolution
