Helfer SpecialLogic

Jan Burse, erstellt 24. Mär 2019
package jekpro.reference.runtime;
import jekpro.model.inter.AbstractSpecial;
import jekpro.model.inter.Engine;
import jekpro.model.molec.BindUniv;
import jekpro.model.molec.Display;
import jekpro.model.molec.DisplayClause;
import jekpro.model.molec.EngineException;
import jekpro.model.rope.Clause;
import jekpro.tools.term.SkelCompound;
* <p>Provides built-in predicates for logic predicates.</p>
* <p/>
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* otherwise agreed upon, XLOG Technologies GmbH makes no warranties
* regarding the provided information. XLOG Technologies GmbH assumes
* no liability that any problems might be solved with the information
* provided by XLOG Technologies GmbH.
* <p/>
* Rights & License
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* and patent rights in particular - are the sole property of XLOG
* Technologies GmbH. If the company was not the originator of some
* excerpts, XLOG Technologies GmbH has at least obtained the right to
* reproduce, change and translate the information.
* <p/>
* Reproduction is restricted to the whole unaltered document. Reproduction
* of the information is only allowed for non-commercial uses. Selling,
* giving away or letting of the execution of the library is prohibited.
* The library can be distributed as part of your applications and libraries
* for execution provided this comment remains unchanged.
* <p/>
* Restrictions
* Only to be distributed with programs that add significant and primary
* functionality to the library. Not to be distributed with additional
* software intended to replace any components of the library.
* <p/>
* Trademarks
* Jekejeke is a registered trademark of XLOG Technologies GmbH.
public final class SpecialLogic extends AbstractSpecial {
private final static int SPECIAL_SYS_LOCAL_CUT = 0;
private final static int SPECIAL_SYS_SOFT_LOCAL_CUT = 1;
private final static int SPECIAL_SYS_SAFE = 2;
* <p>Create a logic special.</p>
* @param i The id of the special.
public SpecialLogic(int i) {
* <p>Logically evaluate a term in a list of goals for the first time.</p>
* <p>The term is passed via the skel and display of the engine.</p>
* <p>The continuation is passed via the r and u of the engine.</p>
* <p>The new continuation is returned via the skel and display of the engine.</p>
* @param en The engine.
* @return True if the predicate succeeded, otherwise false.
* @throws EngineException Shit happens.
public final boolean moniFirst(Engine en)
throws EngineException {
switch (id) {
DisplayClause u = en.contdisplay;
en.window = u;
en.fault = null;
en.window = null;
if (en.fault != null)
throw en.fault;
return true;
u = en.contdisplay;
if ((((u.flags & DisplayClause.MASK_DPCL_MORE) != 0) ?
u.number + 1 : u.number) >= en.number) {
en.window = u;
en.fault = null;
en.window = null;
if (en.fault != null)
throw en.fault;
} else {
u.flags |= DisplayClause.MASK_DPCL_SOFT;
return true;
Object[] temp = ((SkelCompound) en.skel).args;
Display ref = en.display;
en.skel = temp[0];
en.display = ref;
Clause clause = en.store.foyer.CLAUSE_CONT;
DisplayClause ref2 = new DisplayClause(clause.dispsize);
ref2.def = clause;
ref2.bind[0].bindUniv(en.skel, en.display, en);
en.contskel = clause;
en.contdisplay = ref2;
return true;
throw new IllegalArgumentException(AbstractSpecial.OP_ILLEGAL_SPECIAL);