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

namespace SetTools
{
    class Util
    {
        //16进制string转byte数组
        public static byte[] hexString2bytes(int size, String src)
        {
            if (size <= 0) return null;
            byte[] bs = new byte[size];
            int i;
            for (i = 0; i < size; i++)
            {
                bs[i] = Convert.ToByte(src.Substring(i * 2, 2), 16);
            }
            return bs;
        }

        //ascii string转byte数组
        public static byte[] ascString2bytes(int size, String src)
        {
            if (size <= 0) return null;
            byte[] ss = System.Text.Encoding.ASCII.GetBytes(src);
            byte[] bs = new byte[size];
            int i = size;
            if (i > ss.Length)
            {
                i = ss.Length;
            }
            while (i > 0)
            {
                i--;
                bs[i] = ss[i];
            }
            return bs;
        }

        //将单个字节数值转string， 2位可视16进制字符显示
        public static string byteHex2String(Byte value)
        {
            String t = Convert.ToString(value, 16);
            if (t.Length < 2)
            {
                t = "0" + t;
            }
            return (t);
        }

        //16进制byte数组转string
        //byte bt = 0x35;
        //bt.ToString("x2") = "35"
        public static string bytesHex2String(byte[] value)
        {
            int i, size = value.Length;
            StringBuilder sb = new StringBuilder();
            for (i = 0; i < size; i++)
            {
                sb.Append(byteHex2String(value[i]));
            }
            return (sb.ToString());
        }

        //byte数组转string
        public static string bytes2String(byte[] value)
        {
            return System.Text.Encoding.GetEncoding("GB18030").GetString(value);
        }

        //32位数字转string
        public static string uint2HexString(UInt32 value) {
            return(value.ToString("X2"));
        }

        //byte转bcd
        //bin:0-99
        public static byte bin2BCD(byte bin){
            byte msb;
            if (bin > 99)
            {
                return (0x99);
            }
            msb = (byte)(bin / 10);
            return (byte)(bin + msb * 6);//bin = msb * 10 + lsb
        }

        //bcd转byte
        public static byte bcd2bin(byte bcd)
        {//2位BCD码转二进制
            byte msb;//高4位，即10位上的值
            msb =(byte)(bcd >> 4);
            return (byte)(bcd - msb * 6);//bcd = msb*16 + lsb
        }
    }
}