31 lines
959 B
Java
31 lines
959 B
Java
package org.nfunk.jep.function;
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import java.util.Stack;
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import org.nfunk.jep.ParseException;
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import org.nfunk.jep.type.Complex;
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public class Logarithm extends PostfixMathCommand {
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private static final double LOG10 = Math.log(10.0D);
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private static final Complex CLOG10 = new Complex(Math.log(10.0D), 0.0D);
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public void run(Stack paramStack) throws ParseException {
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checkStack(paramStack);
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Object object = paramStack.pop();
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paramStack.push(log(object));
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}
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public Object log(Object paramObject) throws ParseException {
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if (paramObject instanceof Complex)
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return ((Complex)paramObject).log().div(CLOG10);
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if (paramObject instanceof Number) {
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double d = ((Number)paramObject).doubleValue();
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if (d > 0.0D)
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return new Double(Math.log(d) / LOG10);
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Complex complex = new Complex(d);
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return complex.log().div(CLOG10);
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}
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throw new ParseException("Invalid parameter type");
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}
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}
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