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

namespace SLH.SSDMS.Common
{
    /// <summary>
    /// 数据类型转换
    /// </summary>
    public static class StringChange
    {
        #region 数据类型转换函数
        public static byte[] Swap16Bytes(byte[] OldU16)
        {
            byte[] ReturnBytes = new byte[2];
            ReturnBytes[1] = OldU16[0];
            ReturnBytes[0] = OldU16[1];
            return ReturnBytes;
        }

        public static bool CompareBytes(byte[] byteA, byte[] byteB, int iLen)
        {
            for (int i = 0; i < iLen; i++)
            {
                if (byteA[i] != byteB[i])
                {
                    return false;
                }
            }
            return true;
        }

        public static string bytesToHexStr(byte[] bytes, int iLen)//e.g. { 0x01, 0x01} ---> " 01 01"
        {
            string returnStr = "";
            if (bytes != null)
            {
                for (int i = 0; i < iLen; i++)
                {
                    returnStr += bytes[i].ToString("X2");
                }
            }
            return returnStr;
        }

        public static byte[] HexStrTorbytes(string strHex)//e.g. " 01 01" ---> { 0x01, 0x01}
        {
            strHex = strHex.Replace(" ", "");
            if ((strHex.Length % 2) != 0)
                strHex += " ";
            byte[] returnBytes = new byte[strHex.Length / 2];
            for (int i = 0; i < returnBytes.Length; i++)
                returnBytes[i] = Convert.ToByte(strHex.Substring(i * 2, 2), 16);
            return returnBytes;
        }

        public static string StringToHexString(string s, Encoding encode)
        {
            byte[] b = encode.GetBytes(s);          //按照指定编码将string编程字节数组
            string result = string.Empty;
            for (int i = 0; i < b.Length; i++)      //逐字节变为16进制字符，以%隔开
            {
                result += "%" + Convert.ToString(b[i], 16);
            }
            return result;
        }

        public static string HexStringToString(string hs, Encoding encode)
        {
            //以%分割字符串，并去掉空字符
            string[] chars = hs.Split(new char[] { '%' }, StringSplitOptions.RemoveEmptyEntries);
            byte[] b = new byte[chars.Length];
            //逐个字符变为16进制字节数据
            for (int i = 0; i < chars.Length; i++)
            {
                b[i] = Convert.ToByte(chars[i], 16);
            }
            //按照指定编码将字节数组变为字符串
            return encode.GetString(b);
        }

        public static short SwapInt16(this short n)
        {
            return (short)(((n & 0xff) << 8) | ((n >> 8) & 0xff));
        }

        public static ushort SwapUInt16(this ushort n)
        {
            return (ushort)(((n & 0xff) << 8) | ((n >> 8) & 0xff));
        }

        public static int SwapInt32(this int n)
        {
            return (int)(((SwapInt16((short)n) & 0xffff) << 0x10) |
                          (SwapInt16((short)(n >> 0x10)) & 0xffff));
        }

        public static uint SwapUInt32(this uint n)
        {
            return (uint)(((SwapUInt16((ushort)n) & 0xffff) << 0x10) |
                           (SwapUInt16((ushort)(n >> 0x10)) & 0xffff));
        }

        public static long SwapInt64(this long n)
        {
            return (long)(((SwapInt32((int)n) & 0xffffffffL) << 0x20) |
                           (SwapInt32((int)(n >> 0x20)) & 0xffffffffL));
        }

        public static ulong SwapUInt64(this ulong n)
        {
            return (ulong)(((SwapUInt32((uint)n) & 0xffffffffL) << 0x20) |
                            (SwapUInt32((uint)(n >> 0x20)) & 0xffffffffL));
        }
        #endregion
    }
}