[Freeciv-Dev] Re: patch: hashtable stuff, attempt #2

[Jed Davis <jldavis@xxxxxxxxxxxxxx>]

--On Tuesday, 1 August 2000 11:15 PM +1000 David Pfitzner 
<dwp@xxxxxxxxxxxxxx> wrote:
> Jed Davis <jldavis@xxxxxxxxxxxxxx> wrote:
>
> > & I should note that the list of prime table sizes, string hash function
> > (a  simple radix-5 polynomial encoding), integer hash function
> > (identity), and  most of a binary search algorithm were more or less
> > taken from the g++ STL  (courtesy of SGI and HP); I didn't think these
> > inclusions were significant  enough to require a copyright notice.
> When you say g++ STL, does that mean it is available under GPL if
> our use were to fall under copyright?
>
> (Otherwise I would be a little concerned - much better for Freeciv
> code to be unambiguously free, rather than guess whether something
> is substantial enough, or "copying enough" to fall under copyright.)
I made a point of checking on that before I did anything.  This is from my 
/usr/include/g++-2/std_hashtable.h: (the same notice appears on all of the 
STL headers)
/*
* Copyright (c) 1996
* Silicon Graphics Computer Systems, Inc.
*
* Permission to use, copy, modify, distribute and sell this software
* and its documentation for any purpose is hereby granted without fee,
* provided that the above copyright notice appear in all copies and
* that both that copyright notice and this permission notice appear
* in supporting documentation.  Silicon Graphics makes no
* representations about the suitability of this software for any
* purpose.  It is provided "as is" without express or implied warranty.
*
*
* Copyright (c) 1994
* Hewlett-Packard Company
*
* Permission to use, copy, modify, distribute and sell this software
* and its documentation for any purpose is hereby granted without fee,
* provided that the above copyright notice appear in all copies and
* that both that copyright notice and this permission notice appear
* in supporting documentation.  Hewlett-Packard Company makes no
* representations about the suitability of this software for any
* purpose.  It is provided "as is" without express or implied warranty.
*
*/

This seems GPL-compatible (and then some) to me.  The only condition I see 
(and the one I was referring to before) is the obvious one of noting the 
copyright and permissions if a significant amount of the original is used. 
(Which I doubt is the case here, since everything I used is fairly common 
knowledge, at least as far as algorithms go.)
--Jed