org.legacy.utility.BufferUtils.java Source code

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Here is the source code for org.legacy.utility.BufferUtils.java

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/**
 * Copyright (c) 2014 Legacy 814
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
package org.legacy.utility;

import io.netty.buffer.ByteBuf;

/**
 * 
 * @author Im Frizzy <skype:kfriz1998>
 * @since Jul 14, 2014
 */
public final class BufferUtils {

    /**
     * Reads a string used from the {@link ChannelBuffer}.
     * @param in The {@link ChannelBuffer}.
     * @return The string.
     */
    public static String readBufferedString(ByteBuf in) {
        StringBuilder string = new StringBuilder();
        byte b;
        while (in.isReadable() && (b = in.readByte()) != 0) {
            string.append((char) b);
        }
        return string.toString();
    }

    /**
     * Writes a integer to the {@link ChannelBuffer}.
     * @param value The value.
     * @param index The index.
     * @param buffer The buffer.
     */
    public static void writeBufferedInt(int value, int index, byte[] buffer) {
        buffer[index++] = (byte) (value >> 24);
        buffer[index++] = (byte) (value >> 16);
        buffer[index++] = (byte) (value >> 8);
        buffer[index++] = (byte) value;
    }

    /**
     * Reads a buffered integer from the {@link ChannelBuffer}.
     * @param index The index.
     * @param buffer The buffer.
     * @return The integer.
     */
    public static int readBufferedInt(int index, byte[] buffer) {
        return ((buffer[index++] & 0xff) << 24) | ((buffer[index++] & 0xff) << 16) | ((buffer[index++] & 0xff) << 8)
                | (buffer[index++] & 0xff);
    }

}