From: Chris Moore <dooglus@gmail.com>
Cc: c.a.rendle@gmail.com, emacs-devel@gnu.org
Subject: Re: C file recoginzed as image file
Date: Sat, 06 Jan 2007 13:42:14 +0100 [thread overview]
Message-ID: <m2mz4wnx7d.fsf@gmail.com> (raw)
In-Reply-To: <E1H31i8-0000Ns-SG@fencepost.gnu.org> (Richard Stallman's message of "Fri\, 05 Jan 2007 21\:55\:08 -0500")
Richard Stallman <rms@gnu.org> writes:
> Similarly, any text file which starts with the 4 characters "GIF8" is
> treated as if it was an image.
>
> Is there anything else we could check for
> to distinguish real GIF files from other files?
> Would someone please check the spec?
http://www.w3.org/Graphics/GIF/spec-gif89a.txt tells me that the first
3 bytes contain the fixed value 'GIF', and the next 3 bytes contain
the version number:
Version Numbers as of 10 July 1990 : "87a" - May 1987
"89a" - July 1989
Version numbers are ordered numerically increasing on the first two
digits starting with 87 (87,88,...,99,00,...,85,86) and
alphabetically increasing on the third character (a,...,z).
Immediately after this 6 byte header comes the logical screen
descriptor, which doesn't contain anything we can use to recognise a
valid image.
So a better image-type-header-regexps entry would be:
("\\`GIF[0-9][0-9][a-z]" . gif)
next prev parent reply other threads:[~2007-01-06 12:42 UTC|newest]
Thread overview: 150+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-01-05 14:27 C file recoginzed as image file Charles Rendleman
2007-01-05 14:46 ` Chris Moore
2007-01-05 14:52 ` Lennart Borgman (gmail)
2007-01-05 15:02 ` Chris Moore
2007-01-05 19:02 ` Juanma Barranquero
2007-01-05 22:23 ` Chris Moore
2007-01-05 22:44 ` Juanma Barranquero
2007-01-05 22:47 ` Juanma Barranquero
2007-01-05 23:01 ` Chris Moore
2007-01-05 23:15 ` Juanma Barranquero
2007-01-06 18:07 ` Richard Stallman
2007-01-06 18:49 ` Chris Moore
2007-01-06 0:12 ` Jason Rumney
2007-01-06 18:07 ` Richard Stallman
2007-01-07 19:20 ` Juanma Barranquero
2007-01-08 5:33 ` Richard Stallman
2007-01-06 2:55 ` Richard Stallman
2007-01-06 10:52 ` Juanma Barranquero
2007-01-06 3:20 ` Stefan Monnier
2007-01-06 10:58 ` Juanma Barranquero
2007-01-07 16:50 ` Mathias Dahl
2007-01-07 3:46 ` Richard Stallman
2007-01-07 5:36 ` Stefan Monnier
2007-01-08 5:32 ` Richard Stallman
2007-01-08 15:09 ` Stefan Monnier
2007-01-08 15:25 ` Kim F. Storm
2007-01-08 17:32 ` Lennart Borgman (gmail)
2007-01-08 19:54 ` Eli Zaretskii
2007-01-09 11:12 ` Jan Nieuwenhuizen
2007-01-09 11:44 ` Chong Yidong
2007-01-09 11:57 ` Jan Nieuwenhuizen
2007-01-09 12:40 ` David Kastrup
2007-01-09 13:03 ` martin rudalics
2007-01-09 12:57 ` Chong Yidong
2007-01-09 16:01 ` Stuart D. Herring
2007-01-09 13:11 ` Stephen Leake
2007-01-15 6:06 ` Giorgos Keramidas
2007-01-09 21:49 ` Eli Zaretskii
2007-01-09 22:20 ` Alan Mackenzie
2007-01-08 19:48 ` Eli Zaretskii
2007-01-08 22:34 ` Stefan Monnier
2007-01-08 23:26 ` Lennart Borgman (gmail)
2007-01-09 4:08 ` Richard Stallman
2007-01-09 9:48 ` Lennart Borgman (gmail)
2007-01-09 11:06 ` Jason Rumney
2007-01-09 12:01 ` Lennart Borgman (gmail)
2007-01-09 12:16 ` Jason Rumney
2007-01-09 12:23 ` Lennart Borgman (gmail)
2007-01-10 1:04 ` Richard Stallman
2007-01-10 9:05 ` Jason Rumney
2007-01-10 9:38 ` Lennart Borgman (gmail)
2007-01-10 23:06 ` Richard Stallman
2007-01-09 21:54 ` Eli Zaretskii
2007-01-09 21:55 ` Lennart Borgman (gmail)
2007-01-09 23:56 ` Chris Moore
2007-01-10 0:21 ` Lennart Borgman (gmail)
2007-01-10 15:11 ` Chris Moore
2007-01-10 15:17 ` Lennart Borgman (gmail)
2007-01-09 21:08 ` Richard Stallman
2007-01-09 21:40 ` Lennart Borgman (gmail)
2007-01-08 17:09 ` Stephen J. Turnbull
2007-01-08 20:26 ` Juanma Barranquero
2007-01-08 20:39 ` David Kastrup
2007-01-08 20:48 ` Juanma Barranquero
2007-01-08 20:52 ` David Kastrup
2007-01-08 21:03 ` Juanma Barranquero
2007-01-09 7:57 ` David Kastrup
2007-01-09 9:08 ` Juanma Barranquero
2007-01-09 18:50 ` Chris Moore
2007-01-09 19:47 ` Juanma Barranquero
2007-01-09 22:38 ` Stefan Monnier
2007-01-09 23:19 ` Juanma Barranquero
2007-01-10 1:12 ` Stefan Monnier
2007-01-10 1:37 ` Stephen Leake
2007-01-08 22:42 ` Juanma Barranquero
2007-01-08 23:27 ` Stefan Monnier
2007-01-08 23:39 ` Juanma Barranquero
2007-01-09 2:07 ` Stefan Monnier
2007-01-08 23:32 ` Stefan Monnier
2007-01-08 23:43 ` Juanma Barranquero
2007-01-09 0:11 ` Stuart D. Herring
2007-01-09 0:19 ` Juanma Barranquero
2007-01-09 13:16 ` Stephen Leake
2007-01-09 17:57 ` Richard Stallman
2007-01-09 19:59 ` Lennart Borgman (gmail)
2007-01-10 1:04 ` Richard Stallman
2007-01-07 9:04 ` Chris Moore
2007-01-08 5:33 ` Richard Stallman
2007-01-08 13:34 ` Chris Moore
2007-01-08 18:20 ` David Kastrup
2007-01-08 21:02 ` Chris Moore
2007-01-08 21:14 ` Chris Moore
2007-01-09 0:01 ` Richard Stallman
2007-01-09 1:08 ` Chris Moore
2007-01-09 17:57 ` Richard Stallman
2007-01-09 23:24 ` Chris Moore
2007-01-09 23:39 ` Lennart Borgman (gmail)
2007-01-10 1:00 ` Chris Moore
2007-01-10 1:05 ` Lennart Borgman (gmail)
2007-01-09 4:40 ` Stephen J. Turnbull
2007-01-09 21:07 ` Richard Stallman
2007-01-10 4:23 ` Stephen J. Turnbull
2007-01-10 23:05 ` Richard Stallman
2007-01-09 13:07 ` Stephen Leake
2007-01-09 13:25 ` Juanma Barranquero
2007-01-09 13:57 ` Vinicius Jose Latorre
2007-01-09 23:37 ` Juanma Barranquero
2007-01-15 6:10 ` Giorgos Keramidas
2007-01-09 22:58 ` Chris Moore
2007-01-09 23:31 ` Juanma Barranquero
2007-01-10 1:31 ` Stephen Leake
2007-01-08 5:33 ` Richard Stallman
2007-01-07 10:05 ` Lennart Borgman (gmail)
2007-01-06 2:55 ` Richard Stallman
2007-01-06 3:16 ` Stefan Monnier
2007-01-06 12:48 ` Chris Moore
2007-01-07 3:47 ` Richard Stallman
2007-01-07 9:21 ` Chris Moore
2007-01-07 9:58 ` Lennart Borgman (gmail)
2007-01-08 5:32 ` Richard Stallman
2007-01-08 14:05 ` Reiner Steib
2007-01-08 14:16 ` Andreas Schwab
2007-01-08 18:12 ` Stuart D. Herring
2007-01-09 0:01 ` Richard Stallman
2007-01-14 2:52 ` Giorgos Keramidas
2007-01-14 18:55 ` Sascha Wilde
2007-01-15 14:58 ` Richard Stallman
2007-01-15 15:14 ` Jason Rumney
2007-01-19 16:14 ` Juanma Barranquero
2007-01-19 16:33 ` Jason Rumney
2007-01-19 17:10 ` Juanma Barranquero
2007-01-20 2:10 ` Richard Stallman
2007-01-20 23:38 ` Juanma Barranquero
2007-01-21 22:27 ` Richard Stallman
2007-01-21 22:36 ` Jason Rumney
2007-01-21 22:47 ` Juanma Barranquero
2007-01-22 9:04 ` Richard Stallman
2007-01-14 23:23 ` Richard Stallman
2007-01-15 1:14 ` Stefan Monnier
2007-01-15 5:59 ` Giorgos Keramidas
2007-01-15 23:27 ` Richard Stallman
2007-01-07 11:49 ` Jason Rumney
2007-01-07 16:21 ` Stefan Monnier
2007-01-08 5:33 ` Richard Stallman
2007-01-06 2:55 ` Richard Stallman
2007-01-06 12:42 ` Chris Moore [this message]
2007-01-07 3:47 ` Richard Stallman
2007-01-07 9:28 ` Michaël Cadilhac
2007-01-08 5:32 ` Richard Stallman
2007-01-06 2:55 ` Richard Stallman
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