Reads a signed 64 bit integer from an array coming from a device. - CSharp System

CSharp examples for System:Int64

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Description

Reads a signed 64 bit integer from an array coming from a device.

Demo Code


using System.Text;
using System.Linq;
using System.Collections.Generic;
using System;/*from ww  w .j  a  v  a2  s  .c o  m*/

public class Main{
        /// <summary>
      /// Reads a signed 64 bit integer from an array coming from a device.
      /// </summary>
      /// <param name="value">the array containing the int</param>
      /// <param name="offset">the offset in the array at which the int starts</param>
      /// <remarks>Array length must be at least offset + 8</remarks>
      /// <returns>the integer read from the array</returns>
      public static long Swap64bitFromArray ( this byte[] value, int offset ) {
         long v = 0;
         v |= ( (long)value[offset] ) & 0x00000000000000FFL;
         v |= ( ( (long)value[offset + 1] ) & 0x00000000000000FFL ) << 8;
         v |= ( ( (long)value[offset + 2] ) & 0x00000000000000FFL ) << 16;
         v |= ( ( (long)value[offset + 3] ) & 0x00000000000000FFL ) << 24;
         v |= ( ( (long)value[offset + 4] ) & 0x00000000000000FFL ) << 32;
         v |= ( ( (long)value[offset + 5] ) & 0x00000000000000FFL ) << 40;
         v |= ( ( (long)value[offset + 6] ) & 0x00000000000000FFL ) << 48;
         v |= ( ( (long)value[offset + 7] ) & 0x00000000000000FFL ) << 56;

         return v;
      }
}

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