On Friday, August 30, 2002, at 02:53 PM, Joseph J. Strout wrote:
At 2:45 PM -0400 8/30/02, Charles Yeomans wrote:
It would be safer to write the new file to a temporary file, then swap
the contents of the two files. There are MacOS File Manager functions
that you can use to do this. I assume that the Windows API supports
this sort of operation as well.
Though not quite as good as swapping the file contents, there's another
method that's almost and good but more portable. Write out your new
file to the same folder but with a temporary file name (just make up
one that doesn't already exist). Then, when that's done successfully,
rename the old file to a different temporary name, name your new file
to its proper name, and delete the old file.
In any case, the idea is to put off deleting the old file as long as
possible, so that if you crash (lose power, etc.) in the middle of
saving, the user's data isn't lost.
Sure, but it's much more macho to use a toolbox call.
Charles Yeomans
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