Helfer SpecialHelper

Jan Burse, erstellt 15. Sep 2018
package jekmin.frequent.decimal;
import jekpro.model.inter.AbstractSpecial;
import jekpro.model.inter.Engine;
import jekpro.model.molec.Display;
/**
* <p>Provides some constants.</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 class SpecialHelper extends AbstractSpecial {
private final static int EVALUABLE_LOG2 = 0;
private final static int EVALUABLE_LOG10 = 1;
public static final Double DOUBLE_LOG2 = Double.valueOf(Math.log(2));
public static final Double DOUBLE_LOG10 = Double.valueOf(Math.log(10));
/**
* <p>Create a constant evaluable.</p>
*
* @param i The built-in ID.
*/
public SpecialHelper(int i) {
super(i);
subflags |= MASK_DELE_ARIT;
}
/**
* <p>Arithmetically evaluate an evaluable.</p>
* <p>The evaluable 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 result is passed via the skel and display of the engine.</p>
*
* @param en The engine.
* @return True if new display is returned, otherwise false.
*/
public final boolean moniEvaluate(Engine en) {
switch (id) {
case EVALUABLE_LOG2:
en.skel = DOUBLE_LOG2;
en.display = Display.DISPLAY_CONST;
return false;
case EVALUABLE_LOG10:
en.skel = DOUBLE_LOG10;
en.display = Display.DISPLAY_CONST;
return false;
default:
throw new IllegalArgumentException(OP_ILLEGAL_SPECIAL);
}
}
}

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