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

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Bytecoder java.base Module
There is a newer version: 2024-05-10
/*
 * Copyright 2018 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 java.text.DecimalFormatSymbols;

import de.mirkosertic.bytecoder.api.SubstitutesInClass;

@SubstitutesInClass(completeReplace = true)
public class TStringBuilder {

    private static final DecimalFormatSymbols FORMAT_SYMBOLS = new DecimalFormatSymbols();

    private byte[] byteData;

    public TStringBuilder() {
        byteData = new byte[0];
    }

    public TStringBuilder(byte[] aData) {
        byteData = aData;
    }

    public int length() {
        return byteData.length;
    }

    public char charAt(int aIndex) {
        return (char) byteData[aIndex];
    }

    public void internalAdd(byte[] aOtherData) {
        byte[] theNewData = new byte[byteData.length + aOtherData.length];
        int offset = 0;
        for (int i = 0; i< byteData.length; i++) {
            theNewData[offset++] = byteData[i];
        }
        for (int i=0;i=0;i--) {
            char theChar = theTemp.charAt(i);
            if (theChar != '0') {
                append(FORMAT_SYMBOLS.getDecimalSeparator());
                for (int j=0;j<=i;j++) {
                    append(theTemp.charAt(j));
                }
                return;
            }
        }

        append(FORMAT_SYMBOLS.getDecimalSeparator());
        append('0');
    }

    public TStringBuilder append(long aValue) {
        boolean isNegative = false;
        if (aValue < 0) {
            isNegative = true;
            aValue=-aValue;
        }
        byte[] theBytes = new byte[20];
        int theOffset = 0;
        do {
            int theRemainder = (int) aValue % 10;
            theBytes[theOffset++] = (byte) theRemainder;
            aValue = aValue / 10;
        } while (aValue > 0);

        byte[] theNewData;
        int theStart;
        if (isNegative) {
            theNewData = new byte[theOffset + 1];
            theNewData[0] = '-';
            theStart = 1;
        } else {
            theNewData = new byte[theOffset];
            theStart = 0;
        }
        for (int i=0;i