我可以对byte []执行按位运算吗? [英] Can I perform bitwise operations on byte[]?

问题描述

让我说:

byte[] data = new byte[] { 1, 212, 29, 144 };

我想出办法进行按位与运算的唯一方法首先将byte []转换为uint:

The only way I'm able to figure out to do a bitwise AND & is by first converting the byte[] to a uint:

if ((BitConverter.ToUInt32(data,0)) & 0x7) == 1)
{
    //If the last 3 bits are ...111, then do something
}

这看起来很丑.有没有更好的方法可以对byte []执行按位运算而不必转换为UInt?谢谢.

This seems ugly. Is there a better way to perform bitwise operations on a byte[] without having to convert to a UInt? Thanks.

推荐答案

不，.Net没有直接支持字节数组上的位操作.

No, there no direct support in .Net for bit operations on byte arrays.

您可以

• 转换为您在问题中显示的现有类型
• 自己对数组执行操作并使用数组
• 考虑是否 BigInteger 适用于您的情况(支持对任意长数字进行所有按位运算，但是没有直接在常规 long 值之外写入long constanst的方法)
• 考虑是否 BitArray 适用于您的情况(如果您只需要检查/设置特定的位，则更好).

• convert to existing types like you show in the question
• implement operations on arrays yourself and use arrays
• consider if BigInteger works for your cases (supports all bitwise operation on arbitrary long numbers, but there sitll no direct way to write long constanst outside regular long values)
• consider if BitArray works for your case (better if you just need to check/set particular bits).

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