30 Aug
2006
30 Aug
'06
8:13 a.m.
Hi,
Andrew B said:
Why not use a combination of an extension
name and internal references within the files
data, like the IFF format on the Amiga.
eg. Filename: mypic.IFF
and then within the first 16 bytes are
contained the ASCII "ILBM" and something else
(I forget... that's what not having a properly
working Amiga does to me!). Not sure whyr
they are spread apart and not the first few
bytes.
That's how the xfm file manager does it. There's a (user maintainable)
file of magic data, for example xfm knows gifs start "GIF87a" or
"GIF89a"
TIFFS start 0x4d4d or 0x4949. So it can ignore extensions if it needs to.
--
Cheers,
Stan Barr stanb at dial.pipex.com
The future was never like this!