/*
    * 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:
    *
    *   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 io.netty.buffer;
  
  /**
   * 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) {
          return (short) (memory[index] << 8 | memory[index + 1] & 0xFF);
      }
  
      static int getUnsignedMedium(byte[] memory, int index) {
          return  (memory[index]     & 0xff) << 16 |
                  (memory[index + 1] & 0xff) <<  8 |
                  memory[index + 2] & 0xff;
      }
  
      static int getInt(byte[] memory, int index) {
          return  (memory[index]     & 0xff) << 24 |
                  (memory[index + 1] & 0xff) << 16 |
                  (memory[index + 2] & 0xff) <<  8 |
                  memory[index + 3] & 0xff;
      }
  
      static long getLong(byte[] memory, int index) {
          return  ((long) memory[index]     & 0xff) << 56 |
                  ((long) memory[index + 1] & 0xff) << 48 |
                  ((long) memory[index + 2] & 0xff) << 40 |
                  ((long) memory[index + 3] & 0xff) << 32 |
                  ((long) memory[index + 4] & 0xff) << 24 |
                  ((long) memory[index + 5] & 0xff) << 16 |
                  ((long) memory[index + 6] & 0xff) <<  8 |
                  (long) memory[index + 7] & 0xff;
      }
  
      static void setByte(byte[] memory, int index, int value) {
          memory[index] = (byte) value;
      }
  
      static void setShort(byte[] memory, int index, int value) {
          memory[index]     = (byte) (value >>> 8);
          memory[index + 1] = (byte) value;
      }
  
      static void setMedium(byte[] memory, int index, int value) {
          memory[index]     = (byte) (value >>> 16);
          memory[index + 1] = (byte) (value >>> 8);
          memory[index + 2] = (byte) value;
      }
  
      static void setInt(byte[] memory, int index, int value) {
          memory[index]     = (byte) (value >>> 24);
          memory[index + 1] = (byte) (value >>> 16);
          memory[index + 2] = (byte) (value >>> 8);
          memory[index + 3] = (byte) value;
      }
  
      static void setLong(byte[] memory, int index, long value) {
          memory[index]     = (byte) (value >>> 56);
          memory[index + 1] = (byte) (value >>> 48);
          memory[index + 2] = (byte) (value >>> 40);
          memory[index + 3] = (byte) (value >>> 32);
          memory[index + 4] = (byte) (value >>> 24);
          memory[index + 5] = (byte) (value >>> 16);
          memory[index + 6] = (byte) (value >>> 8);
          memory[index + 7] = (byte) value;
      }
  
      private HeapByteBufUtil() { }
  }