代码语言：javascript复制
using System;
using System.Collections.Generic;
using System.Text;
namespace Bit
{
/*class methods for bits operation*/
public class BitOperation
{
public Byte setBit(Byte targetByte, int targetPos, int value)
{
if ((value == 0 || value == 1) && (targetPos >= 0 && targetPos < 8))
{
int targetPosValue = -1;
switch (targetPos)
{
case 0:
targetPosValue = (targetByte >> 7) & 0x01;
if (targetPosValue == value) //如果指定位的值和传的参数值相同，则没有任何操作，返回
{
break;
}
else
{
if (value == 1)
{
targetByte = Convert.ToByte(targetByte | 0x80);
}
else if (value == 0)
{
targetByte = Convert.ToByte(targetByte & 0x7f);
}
break;
}
case 1:
targetPosValue = (targetByte >> 6) & 0x01;
if (targetPosValue == value) //如果指定位的值和传的参数值相同，则没有任何操作，返回
{
break;
}
else
{
if (value == 1)
{
targetByte = Convert.ToByte(targetByte | 0x40);
}
else if (value == 0)
{
targetByte = Convert.ToByte(targetByte & 0xbf);
}
break;
}
case 2:
targetPosValue = (targetByte >> 5) & 0x01;
if (targetPosValue == value) //如果指定位的值和传的参数值相同，则没有任何操作，返回
{
break;
}
else
{
if (value == 1)
{
targetByte = Convert.ToByte(targetByte | 0x20);
}
else if (value == 0)
{
targetByte = Convert.ToByte(targetByte & 0xdf);
}
break;
}
case 3:
targetPosValue = (targetByte >> 4) & 0x01;
if (targetPosValue == value) //如果指定位的值和传的参数值相同，则没有任何操作，返回
{
break;
}
else
{
if (value == 1)
{
targetByte = Convert.ToByte(targetByte | 0x10);
}
else if (value == 0)
{
targetByte = Convert.ToByte(targetByte & 0xef);
}
break;
}
case 4:
targetPosValue = (targetByte >> 3) & 0x01;
if (targetPosValue == value) //如果指定位的值和传的参数值相同，则没有任何操作，返回
{
break;
}
else
{
if (value == 1)
{
targetByte = Convert.ToByte(targetByte | 0x08);
}
else if (value == 0)
{
targetByte = Convert.ToByte(targetByte & 0xf7);
}
break;
}
case 5:
targetPosValue = (targetByte >> 2) & 0x01;
if (targetPosValue == value) //如果指定位的值和传的参数值相同，则没有任何操作，返回
{
break;
}
else
{
if (value == 1)
{
targetByte = Convert.ToByte(targetByte | 0x04);
}
else if (value == 0)
{
targetByte = Convert.ToByte(targetByte & 0xfb);
}
break;
}
case 6:
targetPosValue = (targetByte >> 1) & 0x01;
if (targetPosValue == value) //如果指定位的值和传的参数值相同，则没有任何操作，返回
{
break;
}
else
{
if (value == 1)
{
targetByte = Convert.ToByte(targetByte | 0x02);
}
else if (value == 0)
{
targetByte = Convert.ToByte(targetByte & 0xfd);
}
break;
}
case 7:
targetPosValue = targetByte & 0x01;
if (targetPosValue == value) //如果指定位的值和传的参数值相同，则没有任何操作，返回
{
break;
}
else
{
if (value == 1)
{
targetByte = Convert.ToByte(targetByte | 0x01);
}
else if (value == 0)
{
targetByte = Convert.ToByte(targetByte & 0xfe);
}
break;
}
default:
break;
}
return targetByte;
}
else
{
return 0;
}
}
public int getBit(Byte targetByte, int targetPos)
{
int value = -1;
switch (targetPos)
{
case 0:
value = (targetByte >> 7) & 0x01;
break;
case 1:
value = (targetByte >> 6) & 0x01;
break;
case 2:
value = (targetByte >> 5) & 0x01;
break;
case 3:
value = (targetByte >> 4) & 0x01;
break;
case 4:
value = (targetByte >> 3) & 0x01;
break;
case 5:
value = (targetByte >> 2) & 0x01;
break;
case 6:
value = (targetByte >> 1) & 0x01;
break;
case 7:
value = targetByte & 0x01;
break;
default:
break;
}
return value;
}
}
}
