org.eclipse.swt.internal.win32.TCHAR.java Source code

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Here is the source code for org.eclipse.swt.internal.win32.TCHAR.java

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/*******************************************************************************
 * Copyright (c) 2000, 2014 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.swt.internal.win32;

import java.util.Arrays;

/**
 * This class implements the conversions between unicode characters
 * and the <em>platform supported</em> representation for characters.
 * <p>
 * Note that unicode characters which can not be found in the platform
 * encoding will be converted to an arbitrary platform specific character.
 * </p>
 *
 * @jniclass flags=no_gen
 */
public class TCHAR {
    public char[] chars;

    public final static int sizeof = 2;

    public TCHAR(int codePage, int length) {
        chars = new char[length];
    }

    public TCHAR(int codePage, char ch, boolean terminate) {
        this(codePage, terminate ? new char[] { ch, '\0' } : new char[] { ch }, false);
    }

    public TCHAR(int codePage, char[] chars, boolean terminate) {
        int charCount = chars.length;
        if (terminate) {
            if (charCount == 0 || (charCount > 0 && chars[charCount - 1] != 0)) {
                char[] newChars = new char[charCount + 1];
                System.arraycopy(chars, 0, newChars, 0, charCount);
                chars = newChars;
            }
        }
        this.chars = chars;
    }

    public TCHAR(int codePage, String string, boolean terminate) {
        this(codePage, getChars(string, terminate), false);
    }

    static char[] getChars(String string, boolean terminate) {
        int length = string.length();
        char[] chars = new char[length + (terminate ? 1 : 0)];
        string.getChars(0, length, chars, 0);
        return chars;
    }

    public void clear() {
        Arrays.fill(chars, (char) 0);
    }

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

    public int strlen() {
        for (int i = 0; i < chars.length; i++) {
            if (chars[i] == '\0')
                return i;
        }
        return chars.length;
    }

    public int tcharAt(int index) {
        return chars[index];
    }

    @Override
    public String toString() {
        return toString(0, length());
    }

    public String toString(int start, int length) {
        return new String(chars, start, length);
    }

}