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

namespace OrpaonEMS.App.Com
{
    public class BitHelper
    {
        /// <summary>
        /// 获取字的高字节
        /// </summary>
        public static byte GetHByteUint16(ushort data)
        {
            return (byte)(data >> 8);//高位
        }

        /// <summary>
        /// 获取字的低字节
        /// </summary>
        public static byte GetLByteUint16(ushort data)
        {
            return (byte)(data & 0xff);//低位
        }

        /// <summary>
        /// 根据Int类型的值，返回用1或0(对应True或Flase)填充的数组
        /// <remarks>从右侧开始向左索引(0~31)</remarks>
        /// </summary>
        /// <param name="value"></param>
        /// <returns></returns>
        public static IEnumerable<bool> GetBitList(int value)
        {
            var list = new List<bool>(32);
            for (var i = 0; i <= 31; i++)
            {
                var val = 1 << i;
                list.Add((value & val) == val);
            }
            return list;
        }

        /// <summary>
        /// 返回Int数据中某一位是否为1
        /// </summary>
        /// <param name="value"></param>
        /// <param name="index">32位数据的从右向左的偏移位索引(0~31)</param>
        /// <returns>true表示该位为1，false表示该位为0</returns>
        public static bool GetBitValue(int value, ushort index)
        {
            if (index > 31) throw new ArgumentOutOfRangeException("index"); //索引出错
            var val = 1 << index;
            return (value & val) == val;
        }

        /// <summary>
        /// 设定Int数据中某一位的值
        /// </summary>
        /// <param name="value">位设定前的值</param>
        /// <param name="index">32位数据的从右向左的偏移位索引(0~31)</param>
        /// <param name="bitValue">true设该位为1,false设为0</param>
        /// <returns>返回位设定后的值</returns>
        public static int SetBitValue(int value, ushort index, bool bitValue)
        {
            if (index > 31) throw new ArgumentOutOfRangeException("index"); //索引出错
            var val = 1 << index;
            return bitValue ? (value | val) : (value & ~val);
        }
    }
}