Helfer SpecialDump

Jan Burse, erstellt 11. Mär 2019
package jekdev.reference.debug;
import jekpro.model.inter.AbstractDefined;
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.rope.LoadOpts;
import jekpro.reference.bootload.SpecialLoad;
import jekpro.reference.reflect.SpecialPred;
import jekpro.tools.array.AbstractDelegate;
import jekpro.tools.term.SkelCompound;
import java.io.IOException;
import java.io.Writer;
/**
* <p>Provides a special predicates for index dump.</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 SpecialDump extends AbstractSpecial {
private final static int SPECIAL_SYS_DUMP = 0;
/**
* <p>Create a index dump special.</p>
*
* @param i The built-in ID.
*/
public SpecialDump(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_SYS_DUMP:
Object[] temp = ((SkelCompound) en.skel).args;
Display ref = en.display;
Predicate pick = SpecialPred.indicatorToProvable(temp[0], ref, en);
Predicate.checkExistentProvable(pick, temp[0], ref);
AbstractDelegate fun = pick.del;
AbstractDefined.checkDefinedRead(fun, pick, en);
Object obj = en.visor.curoutput;
LoadOpts.checkTextWrite(obj);
Writer wr = (Writer) obj;
dumpHeader(pick, wr);
((AbstractDefined) fun).inspectClauses(wr, en);
SpecialLoad.newLineFlush(wr);
return true;
default:
throw new IllegalArgumentException(OP_ILLEGAL_SPECIAL);
}
}
/**
* <p>Show the dump header.</p>
*
* @param defined The defined predicate.
* @param wr The writer.
*/
private static void dumpHeader(Predicate defined, Writer wr)
throws EngineMessage {
try {
wr.write("-------- ");
wr.write(defined.getFun());
wr.write("/");
wr.write(Integer.toString(defined.getArity()));
wr.write(" ---------\n");
} catch (IOException x) {
throw EngineMessage.mapIOException(x);
}
}
}

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