1 /*
2 * Copyright (c) 2001, Zoltan Farkas All Rights Reserved.
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
17 */
18
19 package net.sf.zel.instr.var;
20
21 import net.sf.zel.instr.*;
22 import net.sf.zel.nr.OperableNumber;
23 import net.sf.zel.vm.*;
24
25
26
27 public class MAX extends Instruction
28 {
29 private static final long serialVersionUID = -7339415434652687086L;
30
31 private MAX(){};
32
33 public final void execute(ExecutionContext context) throws ZExecutionException
34 {
35 Object param = null;
36 OperableNumber max = ((OperableNumber) context.popSyncStackVal());
37 while (((param = context.popSyncStackVal()) != EndParamMarker.instance))
38 {
39 if ( max.compareTo(param) <0)
40 {
41 max = ((OperableNumber) param);
42 }
43 }
44 context.stack.push(max);
45 context.ip++;
46 }
47 /**
48 * instance
49 */
50 public static final Instruction instance = new MAX();
51
52
53 }