31 lines
1.0 KiB
Java
31 lines
1.0 KiB
Java
package expression.exceptions;
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import expression.AbstractBinaryOperation;
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import expression.AbstractExpression;
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import expression.OverflowException;
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import java.math.BigDecimal;
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import java.math.BigInteger;
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/**
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* @author Doschennikov Nikita (me@fymio.us)
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*/
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public class CheckedSubtract extends AbstractBinaryOperation {
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public CheckedSubtract(AbstractExpression l, AbstractExpression r) { super(l, r); }
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@Override protected String getOperator() { return "-"; }
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@Override protected int getPriority() { return 1; }
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@Override protected boolean isRightAssoc() { return true; }
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@Override
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protected int applyInt(int a, int b) {
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int result = a - b;
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if (((a ^ b) & (a ^ result)) < 0) {
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throw new OverflowException("subtraction");
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}
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return result;
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}
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@Override protected BigInteger applyBi(BigInteger a, BigInteger b) { return a.subtract(b); }
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@Override protected BigDecimal applyBd(BigDecimal a, BigDecimal b) { return a.subtract(b); }
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} |