On 05/07/2009 04:42 PM, Orion Poplawski wrote:
Tom "spot" Callaway wrote:
> It does not say that you cannot modify the code, but it never says that
> you _CAN_. Modification is not an automatically granted right under
> copyright, they have to explicitly grant it.
>
> ~spot
>
But the copyright notice in the code gives it:
; Copyright (C) 1999-2000, Craig Markwardt
; This software is provided as is without any warranty whatsoever.
; Permission to use, copy, modify, and distribute modified or
; unmodified copies is granted, provided this copyright and disclaimer
; are included unchanged.
Okay, as a combination, I think we've got permission to modify, but
there are still use restrictions in the IDL license that make it
non-free, specifically:
; 5. Allowed use of this software is limited to reading and writing
; IDL variable related portions of IDL Save files. It may not be
; used as a basis for reverse engineering, or otherwise
; accessing any other portions of an IDL save file, including but
; not limited to, those portions that encode executable IDL programs.
; Such use is in violation of the IDL EULA, and will be prosecuted
; to the fullest extent possible by Research Systems, Inc. It is
; permissible to read such sections of an IDL save file for the
; sole purpose of transferring it without examination or interpretation
; to another save file.
~spot