The format of Shared MIME Database magic values

[Alexander Kamyshnikov]

Yes, i had. But i decided to write my own implementation because:
a) my project is forced to use Qt4 only (clients have very old versions of
modified Red Hat with XDG_DATA_DIRS undefined);
b) Windows support (through reading registry HKCR/.ext keys) is required;
c) I'm very curious :)

You think i'm should look deeply at the qmimedatabase.cpp however?


2013/12/13 Jerome Leclanche <adys.wh at gmail.com>

> Have you had a look at the Qt 5 mimetype module?
>
> http://qt-project.org/doc/qt-5.0/qtcore/qmimedatabase.html
> J. Leclanche
>
>
> On Fri, Dec 13, 2013 at 7:35 PM, Alexander Kamyshnikov
> <axill777 at gmail.com> wrote:
> > Hi all!
> > I'm developing the implementation of MIME database in C++/Qt for one
> > commercial program (requirement managment tool, if one will be
> interested).
> > So my question is: the format of magic values to compare file header data
> > with is not specified exactly in the spec. I mean the magic/match/value
> > attribute.
> > What exactly mean those magic strings from
> > /usr/share/mime/packages/freedesktop.org.xml from my Kubuntu?
> > 1) "\1\9"
> > 2) "\376\067\0\043"
> > 3) "\x8AMNG\x0D\x0A\x1A\x0A"
> > Second is looks like octal number in C notation, third - hexadecimal, but
> > about first i'm not sure. It is just "usual" decimal value?
> > What format exactly should use magic values?
> > Thanks for your help. WBR, Alexander
> >
> > P.S. Spec i'm using living here:
> >
> http://standards.freedesktop.org/shared-mime-info-spec/shared-mime-info-spec-latest.html#id2661973
> > P.S. <match> items can be nested. But i can't find yet the clear way to
> > implement their storage programmatically. Some kind of tree, or reverse
> > polish notation should be used here? nevermind
> >
> > _______________________________________________
> > xdg mailing list
> > xdg at lists.freedesktop.org
> > http://lists.freedesktop.org/mailman/listinfo/xdg
> >
>
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