STUN Client

using System;

namespace LumiSoft.Data.lsDB
{
	/// <summary>
	///LDB utility methods.
	/// </summary>
	internal class ldb_Utils
	{
		#region static method LongToByte

		/// <summary>
		/// Convert long value to byte[8].
		/// </summary>
		/// <param name="val">Long value.</param>
		/// <returns></returns>
		public static byte[] LongToByte(long val)
		{
			byte[] retVal = new byte[8];
			retVal[0] = (byte)((val >> 56) & 0xFF);
			retVal[1] = (byte)((val >> 48) & 0xFF);
			retVal[2] = (byte)((val >> 40) & 0xFF);
			retVal[3] = (byte)((val >> 32) & 0xFF);
			retVal[4] = (byte)((val >> 24) & 0xFF);
			retVal[5] = (byte)((val >> 16) & 0xFF);
			retVal[6] = (byte)((val >> 8) & 0xFF);
			retVal[7] = (byte)((val >> 0) & 0xFF);

			return retVal;
		}

		#endregion

		#region static method ByteToLong

		/// <summary>
		/// Converts 8 bytes to long value. Offset byte is included.
		/// </summary>
		/// <param name="array">Data array.</param>
		/// <param name="offset">Offset where 8 bytes long value starts. Offset byte is included.</param>
		/// <returns></returns>
		public static long ByteToLong(byte[] array,int offset)
		{
			long retVal = 0;
			retVal |= (long)array[offset + 0] << 56;
			retVal |= (long)array[offset + 1] << 48;
			retVal |= (long)array[offset + 2] << 40;
			retVal |= (long)array[offset + 3] << 32;
			retVal |= (long)array[offset + 4] << 24;
			retVal |= (long)array[offset + 5] << 16;
			retVal |= (long)array[offset + 6] << 8;
			retVal |= (long)array[offset + 7] << 0;

			return retVal;
		}

		#endregion


		#region static method IntToByte

		/// <summary>
		/// Convert int value to byte[4].
		/// </summary>
		/// <param name="val">Int value.</param>
		/// <returns></returns>
		public static byte[] IntToByte(int val)
		{
			byte[] retVal = new byte[4];
			retVal[0] = (byte)((val >> 24) & 0xFF);
			retVal[1] = (byte)((val >> 16) & 0xFF);
			retVal[2] = (byte)((val >> 8) & 0xFF);
			retVal[3] = (byte)((val >> 0) & 0xFF);

			return retVal;
		}

		#endregion

		#region static method ByteToInt

		/// <summary>
		/// Converts 4 bytes to int value.  Offset byte is included.
		/// </summary>
		/// <param name="array">Data array.</param>
		/// <param name="offset">Offset where 4 bytes int value starts. Offset byte is included.</param>
		/// <returns></returns>
		public static int ByteToInt(byte[] array,int offset)
		{
			int retVal = 0;
			retVal |= (int)array[offset + 0] << 24;
			retVal |= (int)array[offset + 1] << 16;
			retVal |= (int)array[offset + 2] << 8;
			retVal |= (int)array[offset + 3] << 0;

			return retVal;
		}

		#endregion
	}
}