You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
94 lines
2.8 KiB
94 lines
2.8 KiB
/* CompareBinaryOperator Copyright (C) 1998-2002 Jochen Hoenicke.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU Lesser General Public License as published by
|
|
* the Free Software Foundation; either version 2, or (at your option)
|
|
* any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public License
|
|
* along with this program; see the file COPYING.LESSER. If not, write to
|
|
* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*
|
|
* $Id$
|
|
*/
|
|
|
|
package net.sf.jode.expr;
|
|
import net.sf.jode.type.Type;
|
|
import net.sf.jode.decompiler.TabbedPrintWriter;
|
|
|
|
public class CompareBinaryOperator extends Operator {
|
|
boolean allowsNaN = false;
|
|
Type compareType;
|
|
|
|
public CompareBinaryOperator(Type type, int op) {
|
|
super(Type.tBoolean, op);
|
|
compareType = type;
|
|
initOperands(2);
|
|
}
|
|
|
|
public CompareBinaryOperator(Type type, int op, boolean allowsNaN) {
|
|
super(Type.tBoolean, op);
|
|
compareType = type;
|
|
this.allowsNaN = allowsNaN;
|
|
initOperands(2);
|
|
}
|
|
|
|
public int getPriority() {
|
|
switch (getOperatorIndex()) {
|
|
case 26:
|
|
case 27:
|
|
return 500;
|
|
case 28:
|
|
case 29:
|
|
case 30:
|
|
case 31:
|
|
return 550;
|
|
}
|
|
throw new RuntimeException("Illegal operator");
|
|
}
|
|
|
|
public Type getCompareType() {
|
|
return compareType;
|
|
}
|
|
|
|
public void updateSubTypes() {
|
|
subExpressions[0].setType(Type.tSubType(compareType));
|
|
subExpressions[1].setType(Type.tSubType(compareType));
|
|
}
|
|
|
|
public void updateType() {
|
|
Type leftType = Type.tSuperType(subExpressions[0].getType());
|
|
Type rightType = Type.tSuperType(subExpressions[1].getType());
|
|
compareType = compareType
|
|
.intersection(leftType).intersection(rightType);
|
|
subExpressions[0].setType(Type.tSubType(rightType));
|
|
subExpressions[1].setType(Type.tSubType(leftType));
|
|
/* propagate hints? XXX */
|
|
}
|
|
|
|
public Expression negate() {
|
|
if (!allowsNaN || getOperatorIndex() <= NOTEQUALS_OP) {
|
|
setOperatorIndex(getOperatorIndex() ^ 1);
|
|
return this;
|
|
}
|
|
return super.negate();
|
|
}
|
|
|
|
public boolean opEquals(Operator o) {
|
|
return (o instanceof CompareBinaryOperator)
|
|
&& o.operatorIndex == operatorIndex;
|
|
}
|
|
|
|
public void dumpExpression(TabbedPrintWriter writer)
|
|
throws java.io.IOException {
|
|
subExpressions[0].dumpExpression(writer, getPriority()+1);
|
|
writer.breakOp();
|
|
writer.print(getOperatorString());
|
|
subExpressions[1].dumpExpression(writer, getPriority()+1);
|
|
}
|
|
}
|
|
|