add CLP files from SWI

git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@1418 b08c6af1-5177-4d33-ba66-4b1c6b8b522a

LGPL/clp/Makefile.in

@@ -0,0 +1,32 @@
+#
+# default base directory for YAP installation
+#
+ROOTDIR = @prefix@
+#
+# where the binary should be
+#
+BINDIR = $(ROOTDIR)/bin
+#
+# where YAP should look for binary libraries
+#
+LIBDIR=$(ROOTDIR)/lib/Yap
+#
+# where YAP should look for architecture-independent Prolog libraries
+#
+SHAREDIR=$(ROOTDIR)/share
+#
+#
+# You shouldn't need to change what follows.
+#
+INSTALL=@INSTALL@
+INSTALL_DATA=@INSTALL_DATA@
+INSTALL_PROGRAM=@INSTALL_PROGRAM@
+srcdir=@srcdir@
+
+PROGRAMS= $(srcdir)/clp_events.pl
+
+install: $(PROGRAMS)
+	mkdir -p $(DESTDIR)$(SHAREDIR)/Yap
+	mkdir -p $(DESTDIR)$(SHAREDIR)/Yap/clp
+	for p in $(PROGRAMS); do $(INSTALL_DATA) $$p $(DESTDIR)$(SHAREDIR)/Yap/clp; done
+

LGPL/clp/clp_events.pl

@@ -0,0 +1,89 @@
+/*  $Id: clp_events.pl,v 1.1 2005-10-28 17:53:27 vsc Exp $
+
+    Part of SWI-Prolog
+
+    Author:        Tom Schrijvers
+    E-mail:        tom.schrijvers@cs.kuleuven.ac.be
+    WWW:           http://www.swi-prolog.org
+    Copyright (C): 2005, K.U.Leuven
+
+    This program 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.
+
+    This program 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 Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+    As a special exception, if you link this library with other files,
+    compiled with a Free Software compiler, to produce an executable, this
+    library does not by itself cause the resulting executable to be covered
+    by the GNU General Public License. This exception does not however
+    invalidate any other reasons why the executable file might be covered by
+    the GNU General Public License.
+*/
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
+% Module for managing constraint solver events.
+%
+% Author: 	Tom Schrijvers
+% E-mail: 	tom.schrijvers@cs.kuleuven.ac.be
+% Copyright:	2005, K.U.Leuven
+%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+:-module(clp_events,
+	[
+		notify/2,
+		subscribe/4,
+		unsubscribe/2
+	]).
+
+notify(V,NMod) :-
+	( get_attr(V,clp_events,List) ->
+		notify_list(List,NMod)
+	;
+		true
+	).
+
+subscribe(V,NMod,SMod,Goal) :-
+	( get_attr(V,clp_events,List) ->
+		put_attr(V,clp_events,[entry(NMod,SMod,Goal)|List])
+	;
+	        put_attr(V,clp_events,[entry(NMod,SMod,Goal)])
+	).	
+
+unsubscribe(V,SMod) :-
+	( get_attr(V,clp_events,List) ->
+		unsubscribe_list(List,SMod,NList),
+		put_attr(V,clp_events,NList)
+	;
+		true
+	).
+
+notify_list([],_).
+notify_list([entry(Mod,_,Goal)|Rest],NMod) :-
+	( Mod == NMod ->
+		call(Goal)
+	;
+		true
+	),
+	notify_list(Rest,NMod).
+	
+unsubscribe_list([],_,_).
+unsubscribe_list([Entry|Rest],SMod,List) :-
+	Entry = entry(_,Mod,_),
+	( Mod == SMod ->
+		List = Rest
+	;	
+		List = [Entry|Tail],
+		unsubscribe_list(Rest,SMod,Tail)
+	).
+
+attr_unify_hook(_,_).