=======================================================
      This library 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
             Library General Public License for more details.
         =======================================================

  These are a few Inform source files you can include in your own Z-Code
  programs if you want to put them under the GNU General Public License,
  and/or the GNU Library General Public License.  They don't rely on ANY
  other Inform libraries, nor do they require you to add much special code
  to your own files.  Simply add the directive:

	Include "COPYING";
  or:
	Include "COPYING_LIB";
  or:
	Include "COPYING_BOTH";

  to your main .inf source, and call the COPYING(); or COPYING(1); function
  from somewhere in the program [probably as an offshoot of the "info"
  section].  COPYING(0); brings up the General Public Licence, and
  COPYING(1); displays the Library General Public License.  Maybe I should
  set it up so COPYING(3); displays both, in sequence, but whatever.  You
  can do it yourself if you want.

  They use only three routines, named COPYING(); C0PY1NG(); and
  C0PY1NG_L1B(); [the "O"s and "I"s in the latter two are ones and zeroes,
  by the way], so there should be no conflicts with any existing routines
  or routine names you might already have set up.  They use only local
  variables -- no globals -- so again no conflict.  There are a few lines
  of assembly code, but much less than I've seen in other sources.

  You may want to add "COPYING" and GnuSub(); to your program's command
  vocabulary, but that's really pretty basic:

!	Added wherever your other verbs are kept:
[ GnuSub; COPYING(0); ];	!	for the GPL
!	or:
[ GnuSub; COPYING(1); ];	!	for the LibGPL
!	or:
[ GnuSub; myStatement(); COPYING(0); COPYING(1); ];	!	for Both

!	Added after: Include "Grammar";
Verb "gnu" "license" "copyright" "copyleft" "copying"
                *                                -> Gnu;

  You might want fewer verbs than that, especially if your game has a lot
  of rabid yaks and brave, noblehearted goats in it.  ;-)


  In the third case, "myStatement();" was just an suggestion: if under both
  Licenses, you might want to throw in a quick note about what parts are
  under which License, and why.

  I'm not sure if you actually can put *chunks* of a program under the
  standard GPL, but I doubt it.  Looks like an all-or-nothing proposition,
  so there may be no way to use both in one program anyway.

  Remember that the Library GPL allows code libraries to be included in
  proprietary software, or programs where the author considers their own
  original sources private.  This happens a lot with Z-Code story files,
  since viewing the source would spoil any fancy plot-twists and surprises,
  although Inform games are rarely [if ever] commercial.


  I should mention that this code is itself under the GNU Library General
  Public License, except that the text it prints up may not be changed [as
  per the terms of the GNU Library General Public License].  Of course you
  can change what the code *does* -- how these routines behave -- but if it
  is used to display either License, the text itself MUST remain intact.


  If you use it to display other text, not related to either License, then
  of course changes and improvements are completely unrestricted.


			-- pAb-032871	Fri, Jan 26, 2001  3:42:39 PM