namespace CommonClass
{
    /// <summary>
    /// 公共通用类库参数
    /// </summary>
    public class PubCommonClass
    {
        /// <summary>
        /// 
        /// </summary>
        public static Dictionary<uint, ushort> cmd3StartAddress = new Dictionary<uint, ushort>();

        //public Dictionary<>

        public void SetCmd3StartAddress()
        {
            cmd3StartAddress.Add(1, 32);
            cmd3StartAddress.Add(2, 8);
            cmd3StartAddress.Add(3, 8);
            cmd3StartAddress.Add(4, 8);
            cmd3StartAddress.Add(5, 6);
            cmd3StartAddress.Add(6, 16);
            cmd3StartAddress.Add(7, 256);
            cmd3StartAddress.Add(8, 16);
            cmd3StartAddress.Add(9, 16);
            cmd3StartAddress.Add(10, 256);
            cmd3StartAddress.Add(11, 128);
            cmd3StartAddress.Add(12, 12);
            cmd3StartAddress.Add(13, 64);
            cmd3StartAddress.Add(14, 8);
            cmd3StartAddress.Add(15, 256);
            cmd3StartAddress.Add(16, 256);
            cmd3StartAddress.Add(17, 256);
            cmd3StartAddress.Add(18, 256);
            cmd3StartAddress.Add(19, 256);
            cmd3StartAddress.Add(20, 256);
        }


        public static byte checksumDomain(byte[] data)
        {
            int checksum = 0;

            for (int i = 8; i < data.Count(); i++)//这里没校验域所以不减一
            {
                checksum += data[i];
            }

            //foreach (byte b in data)
            //{
            //    checksum += b;
            //}
            // 取校验和的低8位  
            return (byte)(checksum & 0xFF);
        }
        public static bool checksumDomainReceive(byte[] data)
        {
            bool bResult = false;
            int checksum = 0;

            for (int i = 8; i < data.Count() - 1; i++)//这里有校验域所以减一
            {
                checksum += data[i];
            }

            //foreach (byte b in data)
            //{
            //    checksum += b;
            //}
            // 取校验和的低8位  
            if (data[data.Count() - 1] == (byte)(checksum & 0xFF))
                bResult = true;
            return bResult;
        }

        public static ushort ComputeHeaderIpChecksum(byte[] header, int start, int length)
        {

            ushort word16;
            long sum = 0;
            for (int i = start; i < (length + start); i += 2)
            {
                word16 = (ushort)(((header[i] << 8) & 0xFF00)
                + (header[i + 1] & 0xFF));
                sum += (long)word16;
            }

            while ((sum >> 16) != 0)
            {
                sum = (sum & 0xFFFF) + (sum >> 16);
            }

            sum = ~sum;

            return (ushort)sum;


        }
    }
}