1 ////////////////////////////////////////////////////////////////////////////////
2 // MillScript: an Open Spice interpreter and batch website creation tool
3 // Copyright (C) 2005 Kevin Rogers
4 //
5 // This file is part of MillScript.
6 //
7 // MillScript is free software; you can redistribute it and/or modify it under
8 // the terms of the GNU General Public License as published by the Free
9 // Software Foundation; either version 2 of the License, or (at your option)
10 // any later version.
11 //
12 // MillScript is distributed in the hope that it will be useful, but WITHOUT
13 // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 // more details.
16 //
17 // You should have received a copy of the GNU General Public License along with
18 // MillScript; if not, write to the Free Software Foundation, Inc., 59 Temple
19 // Place, Suite 330, Boston, MA 02111-1307 USA
20 ////////////////////////////////////////////////////////////////////////////////
21 package org.millscript.millscript.action.arithmetic;
22
23 import org.millscript.millscript.action.Action;
24 import org.millscript.millscript.action.UnaryOpAction;
25 import org.millscript.millscript.tools.IntegerTools;
26
27
28 /**
29 * This class implements the subtraction action with a constant right hand
30 * value.
31 */
32 public final class ConstantRightSubAction extends UnaryOpAction {
33
34 /**
35 * The constant right hand value.
36 */
37 private final int rhs;
38
39 /**
40 * Constructs a new subtraction action, to subtract the result of the
41 * right hand side action from the left.
42 *
43 * @param left the left hand side action
44 * @param right the right hand side action
45 */
46 public ConstantRightSubAction( final Action left, final int right ) {
47 super( left );
48 this.rhs = right;
49 }
50
51 /**
52 * @see org.millscript.millscript.action.UnaryOpAction#perform(java.lang.Object)
53 */
54 @Override
55 public Object perform( final Object x ) {
56 return IntegerTools.sub( x, rhs );
57 }
58
59 }