blob: 7b83a694bc2a7e39f45d9355d2e8d7c86a3d6132 [file] [log] [blame]
package com.googlecode.prolog_cafe.builtin;
import com.googlecode.prolog_cafe.exceptions.ExistenceException;
import com.googlecode.prolog_cafe.exceptions.IllegalDomainException;
import com.googlecode.prolog_cafe.exceptions.PInstantiationException;
import com.googlecode.prolog_cafe.exceptions.PermissionException;
import com.googlecode.prolog_cafe.lang.*;
import java.io.PrintWriter;
/**
* <code>'$fast_writeq'/2</code><br>
* @author Mutsunori Banbara (banbara@kobe-u.ac.jp)
* @author Naoyuki Tamura (tamura@kobe-u.ac.jp)
* @version 1.0
*/
public class PRED_$fast_writeq_2 extends Predicate.P2 {
public PRED_$fast_writeq_2(Term a1, Term a2, Operation cont) {
arg1 = a1;
arg2 = a2;
this.cont = cont;
}
public Operation exec(Prolog engine) {
engine.setB0();
Term a1, a2;
a1 = arg1;
a2 = arg2;
Object stream = null;
// S_or_a
a1 = a1.dereference();
if (a1.isVariable()) {
throw new PInstantiationException(this, 1);
} else if (a1.isSymbol()) {
if (! engine.getStreamManager().containsKey(a1))
throw new ExistenceException(this, 1, "stream", a1, "");
stream = ((JavaObjectTerm) engine.getStreamManager().get(a1)).object();
} else if (a1.isJavaObject()) {
stream = ((JavaObjectTerm) a1).object();
} else {
throw new IllegalDomainException(this, 1, "stream_or_alias", a1);
}
if (! (stream instanceof PrintWriter))
throw new PermissionException(this, "output", "stream", a1, "");
// print term
((PrintWriter) stream).print(a2.dereference().toQuotedString());
return cont;
}
}