Helper SpecialAttach

Jan Burse, created Mar 11. 2019
package jekdev.reference.system;
import jekdev.model.bugger.SupervisorTrace;
import jekpro.model.inter.AbstractSpecial;
import jekpro.model.inter.Engine;
import jekpro.model.inter.Predicate;
import jekpro.model.molec.Display;
import jekpro.model.molec.EngineException;
import jekpro.model.molec.EngineMessage;
import jekpro.model.pretty.StoreKey;
import jekpro.reference.arithmetic.SpecialEval;
import jekpro.reference.reflect.SpecialPred;
import jekpro.reference.runtime.SpecialQuali;
import jekpro.reference.structure.SpecialUniv;
import jekpro.tools.term.PositionKey;
import jekpro.tools.term.SkelAtom;
import jekpro.tools.term.SkelCompound;
import matula.util.data.ListArray;
/**
* <p>Provides a special predicates for thread attach.</p>
* <p/>
* Warranty & Liability
* To the extent permitted by applicable law and unless explicitly
* 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
* All industrial property rights regarding the information - copyright
* 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 SpecialAttach extends AbstractSpecial {
private final static int SPECIAL_TSPY = 0;
private final static int SPECIAL_TNOSPY = 1;
private final static int SPECIAL_SYS_TSPYING = 2;
private final static int SPECIAL_SYS_TBREAK = 3;
private final static int SPECIAL_SYS_TNOBREAK = 4;
private final static int SPECIAL_SYS_TBREAKING = 5;
/**
* <p>Create a engine trace attach.</p>
*
* @param i The built-in ID.
*/
public SpecialAttach(int i) {
super(i);
}
/**
* <p>Logically evaluate a goal in a list of goals for the first time.</p>
* <p>The goal 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 EngineMessage Shit happens.
* @throws EngineException Shit happens.
*/
public final boolean moniFirst(Engine en)
throws EngineMessage, EngineException {
switch (id) {
case SPECIAL_TSPY:
Object[] temp = ((SkelCompound) en.skel).args;
Display ref = en.display;
Predicate pick = SpecialPred.indicatorToProvable(temp[0], ref, en);
Predicate.checkExistentProvable(pick, temp[0], ref);
((SupervisorTrace) en.visor).addThreadSpyPoint(pick.getArity(), pick.getFun());
return true;
case SPECIAL_SYS_TSPYING:
temp = ((SkelCompound) en.skel).args;
ref = en.display;
if (!en.unifyTerm(temp[0], ref, currentThreadSpyPoints(en), Display.DISPLAY_CONST))
return false;
return true;
case SPECIAL_TNOSPY:
temp = ((SkelCompound) en.skel).args;
ref = en.display;
pick = SpecialPred.indicatorToProvable(temp[0], ref, en);
Predicate.checkExistentProvable(pick, temp[0], ref);
((SupervisorTrace) en.visor).removeThreadSpyPoint(pick.getArity(), pick.getFun());
return true;
case SPECIAL_SYS_TBREAK:
temp = ((SkelCompound) en.skel).args;
ref = en.display;
String key = SpecialUniv.derefAndCastString(temp[0], ref);
Number num = SpecialEval.derefAndCastInteger(temp[1], ref);
SpecialEval.checkNotLessThanZero(num);
int line = SpecialEval.castIntValue(num);
PositionKey pk = new PositionKey(key, line);
((SupervisorTrace) en.visor).addThreadBreakPoint(pk);
return true;
case SPECIAL_SYS_TNOBREAK:
temp = ((SkelCompound) en.skel).args;
ref = en.display;
key = SpecialUniv.derefAndCastString(temp[0], ref);
num = SpecialEval.derefAndCastInteger(temp[1], ref);
SpecialEval.checkNotLessThanZero(num);
line = SpecialEval.castIntValue(num);
pk = new PositionKey(key, line);
((SupervisorTrace) en.visor).removeThreadBreakPoint(pk);
return true;
case SPECIAL_SYS_TBREAKING:
temp = ((SkelCompound) en.skel).args;
ref = en.display;
if (!en.unifyTerm(temp[0], ref, currentThreadBreakPoints(en), Display.DISPLAY_CONST))
return false;
return true;
default:
throw new IllegalArgumentException(OP_ILLEGAL_SPECIAL);
}
}
/**************************************************************/
/* Thread Spypoint Enumeration */
/**************************************************************/
/**
* <p>Create a prolog list with the spy points.</p>
*
* @param en The engine.
* @return The prolog list of the spy points.
* @throws EngineMessage Shit happens.
*/
private static Object currentThreadSpyPoints(Engine en)
throws EngineMessage {
Object res = en.store.foyer.ATOM_NIL;
ListArray<StoreKey> spypoints = ((SupervisorTrace) en.visor).snapshotThreadSpyPoints();
for (int i = 0; i < spypoints.size; i++) {
StoreKey sk = spypoints.get(i);
Object decl = SpecialQuali.indicatorToColonSkel(sk.getFun(), en.store.user,
sk.getArity(), en);
res = new SkelCompound(en.store.foyer.ATOM_CONS, decl, res);
}
return res;
}
/**************************************************************/
/* Breakpoint Enumeration */
/**************************************************************/
/**
* <p>Create a prolog list with the break points.</p>
*
* @param en The engine.
* @return The prolog list of the break points.
*/
private static Object currentThreadBreakPoints(Engine en) {
Object res = en.store.foyer.ATOM_NIL;
ListArray<PositionKey> breakpoints = ((SupervisorTrace) en.visor).snapshotThreadBreakPoints();
for (int i = 0; i < breakpoints.size(); i++) {
PositionKey pk = breakpoints.get(i);
Object decl = new SkelCompound(en.store.foyer.ATOM_SUB,
new SkelAtom(pk.getOrigin()), Integer.valueOf(pk.getLineNo()));
res = new SkelCompound(en.store.foyer.ATOM_CONS, decl, res);
}
return res;
}
}

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