nirvana.support.services.CodingHelper.scala Maven / Gradle / Ivy

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// Copyright 2014 Jun Tsai. All rights reserved.
// site: http://www.ganshane.com
package nirvana.support.services

import java.nio.ByteBuffer

/**
 * 针对数据进行转换
 */
object CodingHelper {
  def EncodeInt32WithBigEndian(i:Int):Array[Byte]={
    return ByteBuffer.allocate(4).putInt(i).array();
  }
  def DecodeInt32WithBigEndian(bytes:Array[Byte],offset:Int=0):Int={
    ByteBuffer.wrap(bytes).getInt
  }
  def DecodeInt32WithLittleEndian(bytes:Array[Byte],offset:Int=0):Int={
    var i = 0;
      i |= bytes(offset) & 0xff;
      i |= (bytes(offset +1) << 8) & 0xffff
      i |= (bytes(offset +2) << 16) & 0xffffff
      i |= (bytes(offset +3) << 24) & 0xffffffff

    i
  }
  def convertAsBytes(i:Int):Array[Byte]={
    val bytes = new Array[Byte](4);
    bytes(0) = (i >>> 24).asInstanceOf[Byte];
    bytes(1) = (i >>> 16).asInstanceOf[Byte];
    bytes(2) = (i >>> 8).asInstanceOf[Byte];
    bytes(3) = (i).asInstanceOf[Byte];

    bytes
  }
  def convertAsInt(bytes:Array[Byte],offset:Int=0):Int={
    var i = 0;
    i |= bytes(offset) << 24;
    i |= bytes(offset +1) << 16;
    i |= bytes(offset +2) << 8;
    i |= bytes(offset +3);

    i
  }
}