HeapByteBufUtil.java — netty Source File

Source Code

/*
 * Copyright 2015 The Netty Project
 *
 * The Netty Project licenses this file to you 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:
 *
 *   https://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 io.netty.buffer;

import io.netty.util.internal.PlatformDependent;

/**
 * Utility class for heap buffers.
 */
final class HeapByteBufUtil {

    static byte getByte(byte[] memory, int index) {
        return memory[index];
    }

    static short getShort(byte[] memory, int index) {
        if (PlatformDependent.hasVarHandle()) {
            return VarHandleByteBufferAccess.getShortBE(memory, index);
        }
        return getShort0(memory, index);
    }

    private static short getShort0(byte[] memory, int index) {
        return (short) (memory[index] << 8 | memory[index + 1] & 0xFF);
    }

    static short getShortLE(byte[] memory, int index) {
        if (PlatformDependent.hasVarHandle()) {
            return VarHandleByteBufferAccess.getShortLE(memory, index);
        }
        return (short) (memory[index] & 0xff | memory[index + 1] << 8);
    }

    static int getUnsignedMedium(byte[] memory, int index) {
        return  (memory[index]     & 0xff) << 16 |
                (memory[index + 1] & 0xff) <<  8 |
                memory[index + 2] & 0xff;
    }

    static int getUnsignedMediumLE(byte[] memory, int index) {
        return  memory[index]     & 0xff         |
                (memory[index + 1] & 0xff) <<  8 |
                (memory[index + 2] & 0xff) << 16;
    }

    static int getInt(byte[] memory, int index) {
        if (PlatformDependent.hasVarHandle()) {
// ... (167 more lines)