Re: [Mldonkey-users] Sha1 implementation benchmark

[kami petersen]

Fortin Denis wrote:

> Le mer 04/02/2004 à 20:40, kami petersen a écrit :
>  
>
> > Fortin Denis wrote:
> >    
> >
> > > I've added another implementation of sha1 hash. It's 
> > > written by Brian Gladman and can be found here :
> > > http://fp.gladman.plus.com/cryptography_technology/sha/index.htm
> > >
> > > Before everything else i would like to make sure that the licence is ok
> > > for mldonkey.
> > it sounds like a bsd-style license, and as such it should be 100% 
> > compatible with the gpl, even without the extra notice he's included. 
> > for compatibility see the page on licenses on http://www.gnu.org/
> >
> > if you choose to add the gpl to it, then copyleft of this particular 
> > code and changes to it is enforced.
> >
> > /kami
> >    
> The 'problem' for me is this : 
> In my understanding the GPL allow me to modify all things in the file
> except the gpl itself, including the notice. So under the gpl i should
> be to remove the author's notice. 
> But i'm allowed to use this file under GPL if and only if keep this
> notice.
>
> Denis Fortin
>
>  
the gpl can not allow you to edit the authors' licence.

the author's licence has to be retained, but you can add the gpl to it 
as well. this is no problem.

the author's licence does not limit the gpl in any way.

the note in the author's licence that you may combine it with the gpl is 
unnecessary, you could do it anyway, unless had it contained demands 
that were in conflict with the gpl.

by merging this code with mldonkey you will be combining the two 
licenses, but the author's license does not, of course, affect any other 
mldonkey code that is not derived from the author's work, and should not 
be added to other code.

so... what you should do is:

1 insert the normal heading from the mldonkey files:

(*
   This file is part of mldonkey.

   mldonkey is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   mldonkey is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with mldonkey; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*)

2 keep the original copyright notice, and licence. don't mess with it. 
don't add your own copyright, you can do this only on things that you 
write yourself from scratch.

3 submit it to the repository.

there is no problem. i think =)

/kami