帮助在C#中的位字段 [英] help for bit field in c#

问题描述

c中有位字段定义，使用它可以节省内存.
如

There is bit field definition in c , using it may save memory.
such as

struct{
   unit32 aa:3;
   unit32 bb:12;
   unit32 cc:15;
   unit32 :2;//reserved
}my bit field;

结构我的位字段"仅占用内存中的32位；
我的问题是，如何在c#中执行此操作，非常感谢.

struct "my bit field" only takes up 32bit in memory;
my question is how can we do this in c#,thanks a lot.

推荐答案

您需要查看

您.Net中不能做位字段.您将不得不寻找另一种方式来表示此信息.例如，使用属性:

You cannot do bit fields in .Net. You will have to find another way to represent this information. For example, using properties:

struct MyBitField {
 private uint data;

 public byte aa { get { return data & 0x03; } set { data = (data & ~ 0x03) | (value & 0x03); } }
 public ushort bb { get { return (data >> 3) & 0x0FFF; } set { data = (data & ~ 0x00007FFC) | ((value & 0x0FFF) << 3; } }
 public ushort bb { get { return (data >> 15) & 0x0FFF; } set { data = (data & ~ 0x3FFF8000) | ((value & 0x0FFF) << 15; } }
}

如果您不需要复制原始位字段的打包并可以扩展它，那就更好了:

It''s much better if you don''t need to replicate the packing of the original bit field and can expand it:

struct MyNotBitFieldAnyMore {
 public byte aa;
 public ushort bb, cc;
}

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