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/*
* Javassist, a Java-bytecode translator toolkit.
* Copyright (C) 1999-2004 Shigeru Chiba. All Rights Reserved.
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. Alternatively, the contents of this file may be used under
* the terms of the GNU Lesser General Public License Version 2.1 or later.
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*/
package javassist.compiler.ast;
import javassist.compiler.CompileError;
import javassist.compiler.TokenId;
/**
* Integer constant.
*/
public class IntConst extends ASTree {
protected long value;
protected int type;
public IntConst(long v, int tokenId) { value = v; type = tokenId; }
public long get() { return value; }
public void set(long v) { value = v; }
/* Returns IntConstant, CharConstant, or LongConstant.
*/
public int getType() { return type; }
public String toString() { return Long.toString(value); }
public void accept(Visitor v) throws CompileError {
v.atIntConst(this);
}
public ASTree compute(int op, ASTree right) {
if (right instanceof IntConst)
return compute0(op, (IntConst)right);
else if (right instanceof DoubleConst)
return compute0(op, (DoubleConst)right);
else
return null;
}
private IntConst compute0(int op, IntConst right) {
int type1 = this.type;
int type2 = right.type;
int newType;
if (type1 == TokenId.LongConstant || type2 == TokenId.LongConstant)
newType = TokenId.LongConstant;
else if (type1 == TokenId.CharConstant
&& type2 == TokenId.CharConstant)
newType = TokenId.CharConstant;
else
newType = TokenId.IntConstant;
long value1 = this.value;
long value2 = right.value;
long newValue;
switch (op) {
case '+' :
newValue = value1 + value2;
break;
case '-' :
newValue = value1 - value2;
break;
case '*' :
newValue = value1 * value2;
break;
case '/' :
newValue = value1 / value2;
break;
case '%' :
newValue = value1 % value2;
break;
case '|' :
newValue = value1 | value2;
break;
case '^' :
newValue = value1 ^ value2;
break;
case '&' :
newValue = value1 & value2;
break;
case TokenId.LSHIFT :
newValue = value << (int)value2;
newType = type1;
break;
case TokenId.RSHIFT :
newValue = value >> (int)value2;
newType = type1;
break;
case TokenId.ARSHIFT :
newValue = value >>> (int)value2;
newType = type1;
break;
default :
return null;
}
return new IntConst(newValue, newType);
}
private DoubleConst compute0(int op, DoubleConst right) {
double value1 = (double)this.value;
double value2 = right.value;
double newValue;
switch (op) {
case '+' :
newValue = value1 + value2;
break;
case '-' :
newValue = value1 - value2;
break;
case '*' :
newValue = value1 * value2;
break;
case '/' :
newValue = value1 / value2;
break;
case '%' :
newValue = value1 % value2;
break;
default :
return null;
}
return new DoubleConst(newValue, right.type);
}
}
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