hudou/MSHO.Collection.Service/MSHO.Collection.Service/Helper.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace MSHO.Collection.Service
{
    public static class Helper {
        
        public static byte[] Int32ToBytes(this int n) {
            var bytes = new byte[4];
            bytes[0] = (byte)(n & 0xFF);
            bytes[1] = (byte)(n >> 8 & 0xFF);
            bytes[2] = (byte)(n >> 16 & 0xFF);
            bytes[3] = (byte)(n >> 24 & 0xFF);

            return bytes;
        }

        public static int BytesToInt32(this byte[] bytes, int index = 0) {
            int n = 0;
            if (bytes != null && bytes.Length >= 4) {
                n = bytes[index + 3];
                n = n << 8 | bytes[index + 2];
                n = n << 8 | bytes[index + 1];
                n = n << 8 | bytes[index + 0];
            }

            return n;
        }

        public static byte[] LongToBytes(this long n)
        {
            var bytes = new byte[sizeof(long)];
            for (var i = 0; i < sizeof(long); i++) {
                bytes[i] = (byte)((n >> (i*8)) & 0xFF);
            }

            return bytes;
        }

        public static long BytesToLong(this byte[] bytes, int index = 0)
        {
            long n = 0;
            if (bytes != null && bytes.Length >= sizeof(long))
            {
                for (var i = sizeof(long) - 1; i >=0; i--) {
                    n = n << 8 | bytes[index + i];
                }
            }

            return n;
        }

        public static T GetEnum<T>(string val, T d) where T : struct
        {
            T result = default(T);
            if (!Enum.TryParse<T>(val, out result))
            {
                result = d;
            }

            return result;

        }
    }
}