de.mirkosertic.bytecoder.classlib.java.lang.TDouble Maven / Gradle / Ivy

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/*
 * Copyright 2017 Mirko Sertic
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package de.mirkosertic.bytecoder.classlib.java.lang;

import de.mirkosertic.bytecoder.api.SubstitutesInClass;
import de.mirkosertic.bytecoder.classlib.VM;

@SubstitutesInClass(completeReplace = false)
public class TDouble {

    @Override
    public boolean equals(final Object o) {
        if (this == o)
            return true;
        if (o == null || getClass() != o.getClass())
            return false;

        final Double aDouble = (Double) o;

        if (compare(aDouble.doubleValue(), ((Double) (Object) this).doubleValue()) != 0) {
            return false;
        }

        return true;
    }

    public static int compare(final double d1, final double d2) {
        if (d1 < d2) {
            return -1;
        }
        if (d1 > d2) {
            return 1;
        }
        return 0;
    }

    public static double parseDouble(final String aValue) {
        final int p = aValue.indexOf('.');
        if (p<0) {
            return VM.stringToLong(aValue);
        }
        final String thePrefix = aValue.substring(0, p);
        final String theSuffix = aValue.substring(p + 1);
        final long theA = VM.stringToLong(thePrefix);
        final long theB = VM.stringToLong(theSuffix);
        int theMultiplier = 1;
        int theLength = Long.toString(theB).length();
        while(theLength > 0) {
            theMultiplier *= 10;
            theLength--;
        }
        if (theA > 0) {
            return theA + ((double) theB) / theMultiplier;
        }
        return theA - ((double) theB) / theMultiplier;
    }

    @Override
    public String toString() {
        return toString(((Double) (Object) this).doubleValue());
    }

    public static Double valueOf(final String aValue) {
        return new Double(parseDouble(aValue));
    }

    public static Double valueOf(final double aValue) {
        return new Double(aValue);
    }

    public static boolean isNaN(final double aValue) {
        return !(aValue == aValue);
    }

    public static String toString(final double aValue) {
        final StringBuilder theBuffer = new StringBuilder();
        theBuffer.append(aValue);
        return theBuffer.toString();
    }
}