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yap-6.3/packages/clpqr/clpr.pl
Vitor Santos Costa 8d1cc35a8a docsc
2016-11-16 17:17:33 -06:00

208 lines
5.6 KiB
Prolog

/* $Id$
Part of CLP(R) (Constraint Logic Programming over Reals)
Author: Leslie De Koninck
E-mail: Leslie.DeKoninck@cs.kuleuven.be
WWW: http://www.swi-prolog.org
http://www.ai.univie.ac.at/cgi-bin/tr-online?number+95-09
Copyright (C): 2004, K.U. Leuven and
1992-1995, Austrian Research Institute for
Artificial Intelligence (OFAI),
Vienna, Austria
This software is part of Leslie De Koninck's master thesis, supervised
by Bart Demoen and daily advisor Tom Schrijvers. It is based on CLP(Q,R)
by Christian Holzbaur for SICStus Prolog and distributed under the
license details below with permission from all mentioned authors.
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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 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.
*/
/** @defgroup clpr_implementation CLP(QR) Predicates
@ingroup clpqr
*/
/** @pred bb_inf(+ _Ints_,+ _Expression_,- _Inf_)
The same as bb_inf/5 but without returning the values of the integers
and with an eps of 0.001.
*/
/** @pred bb_inf(+ _Ints_,+ _Expression_,- _Inf_,- _Vertext_,+ _Eps_)
Computes the infimum of _Expression_ within the current constraint
store, with the additional constraint that in that infimum, all
variables in _Ints_ have integral values. _Vertex_ will contain
the values of _Ints_ in the infimum. _Eps_ denotes how much a
value may differ from an integer to be considered an integer. E.g. when
_Eps_ = 0.001, then X = 4.999 will be considered as an integer (5 in
this case). _Eps_ should be between 0 and 0.5.
*/
/** @pred dump(+ _Target_,+ _Newvars_,- _CodedAnswer_)
Returns the constraints on _Target_ in the list _CodedAnswer_
where all variables of _Target_ have veen replaced by _NewVars_.
This operation does not change the constraint store. E.g. in
~~~~~
dump([X,Y,Z],[x,y,z],Cons)
~~~~~
_Cons_ will contain the constraints on _X_, _Y_ and
_Z_ where these variables have been replaced by atoms `x`, `y` and `z`.
*/
/** @pred entailed(+ _Constraint_)
Succeeds if _Constraint_ is necessarily true within the current
constraint store. This means that adding the negation of the constraint
to the store results in failure.
*/
/** @pred inf(+ _Expression_,- _Inf_)
Computes the infimum of _Expression_ within the current state of the
constraint store and returns that infimum in _Inf_. This predicate
does not change the constraint store.
*/
/** @pred inf(+ _Expression_,- _Sup_)
Computes the supremum of _Expression_ within the current state of
the constraint store and returns that supremum in _Sup_. This
predicate does not change the constraint store.
*/
/** @pred maximize( _V_)
maximise variable _V_
*/
/** @pred minimize(<tt>V</tt>)
minimise variable _V_
*/
:- module(clpr,
[
{}/1,
maximize/1,
minimize/1,
inf/2, inf/4, sup/2, sup/4,
bb_inf/3,
bb_inf/5,
ordering/1,
entailed/1,
clp_type/2,
dump/3%, projecting_assert/1
]).
:- expects_dialect(swi).
%
% Don't report export of private predicates from clpr
%
:- multifile
user:portray_message/2.
:- dynamic
user:portray_message/2.
%
user:portray_message(warning,import(_,_,clpr,private)).
:- load_files(
[
'clpr/bb_r',
'clpr/bv_r',
'clpr/fourmotz_r',
'clpr/ineq_r',
'clpr/itf_r',
'clpr/nf_r',
'clpr/store_r',
'clpqr/class',
'clpqr/dump',
'clpqr/geler',
'clpqr/itf',
'clpqr/ordering',
'clpqr/project',
'clpqr/redund',
library(ugraphs)
],
[
if(not_loaded),
silent(true)
]).
/*******************************
* TOPLEVEL PRINTING *
*******************************/
:- multifile
prolog:message/3.
% prolog:message(query(YesNo)) --> !,
% ['~@'-[chr:print_all_stores]],
% '$messages':prolog_message(query(YesNo)).
prolog:message(query(YesNo,Bindings)) --> !,
{dump_toplevel_bindings(Bindings,Constraints)},
{dump_format(Constraints,Format)},
Format,
'$messages':prolog_message(query(YesNo,Bindings)).
dump_toplevel_bindings(Bindings,Constraints) :-
dump_vars_names(Bindings,[],Vars,Names),
dump(Vars,Names,Constraints).
dump_vars_names([],_,[],[]).
dump_vars_names([Name=Term|Rest],Seen,Vars,Names) :-
( var(Term),
( get_attr(Term,itf,_)
; get_attr(Term,geler,_)
),
\+ memberchk_eq(Term,Seen)
-> Vars = [Term|RVars],
Names = [Name|RNames],
NSeen = [Term|Seen]
; Vars = RVars,
Names = RNames,
Seen = NSeen
),
dump_vars_names(Rest,NSeen,RVars,RNames).
dump_format([],[]).
dump_format([X|Xs],['{~w}'-[X],nl|Rest]) :-
dump_format(Xs,Rest).
memberchk_eq(X,[Y|Ys]) :-
( X == Y
-> true
; memberchk_eq(X,Ys)
).