C# .Net 位运算,字节操作,工具类

c# 位运算 操作类(提供对字节的位获取，和替换)

闲来没事写了一个位运算操作的简单类

using System;
2  using System.Collections.Generic;
3  using System.Text;
4 
5 namespace NatureSex.CommonTool.Basic
6 {
7 ///<summary>
8 /// 位 操作工具类(也可以使用MS中System.Collections.BitArray操作)
9 /// author:NatureSex
10 ///</summary>
11 publicsealedclass BitAssist
12 {
13 private BitAssist() { }
14 
15 #region 获取
16 
17 ///<summary>
18 /// 取byteSource目标位的值
19 ///</summary>
20 ///<param name="byteSource">源字节</param>
21 ///<param name="location">位置(0-7)</param>
22 ///<returns>目标值</returns>
23 publicstaticint GetTargetBit(short location, byte byteSource)
24 {
25 Byte baseNum = (byte)(Math.Pow(2, location +1) /2);
26 return GetTargetBit(location, byteSource, baseNum);
27 }
28 
29 ///<summary>
30 /// 取byteSource目标位的值
31 ///</summary>
32 ///<param name="location"></param>
33 ///<param name="byteSource"></param>
34 ///<param name="baseNum">与 基数(1,2,4,8,16,32,64,128)</param>
35 ///<returns></returns>
36 privatestaticint GetTargetBit(short location, byte byteSource, byte baseNum)
37 {
38 if (location >7|| location <0) return-1000;
39 return (byteSource & baseNum) == baseNum ?1 : 0;
40 }
41 
42 ///<summary>
43 /// 取一批byteSources目标位的对应的值集合
44 ///</summary>
45 ///<param name="location">位置(0-7)</param>
46 ///<param name="byteSources">一批字节</param>
47 ///<returns>一一对应的目标值</returns>
48 publicstaticint[] GetTargetBit(short location, paramsbyte[] byteSources)
49 {
50 if (byteSources ==null) returnnull;
51 int bsLen = byteSources.Length;
52 Byte baseNum = (byte)(Math.Pow(2, location +1) /2);
53 int[] result =newint[bsLen];
54 for (int i =0; i < bsLen; i++)
55 {
56 result[i] = GetTargetBit(location, byteSources[i], baseNum);
57 }
58 return result;
59 } 
60 
61 #endregion
62 
63 #region 替换
64 
65 ///<summary>
66 /// 替换byteSource目标位的值
67 ///</summary>
68 ///<param name="location">替换位置(0-7)</param>
69 ///<param name="value">替换的值(1-true,0-false)</param>
70 ///<param name="byteSource">源字节</param>
71 ///<returns>替换后的值</returns>
72 publicstaticbyte ReplaceTargetBit(short location, bool value, byte byteSource)
73 {
74 Byte baseNum = (byte)(Math.Pow(2, location +1) /2);
75 return ReplaceTargetBit(location, value, byteSource, baseNum);
76 }
77 
78 ///<summary>
79 /// 替换byteSource目标位的值
80 ///</summary>
81 ///<param name="location"></param>
82 ///<param name="value">替换的值(1-true,0-false)</param>
83 ///<param name="byteSource"></param>
84 ///<param name="baseNum">与 基数(1,2,4,8,16,32,64,128)</param>
85 ///<returns></returns>
86 privatestaticbyte ReplaceTargetBit(short location,bool value,byte byteSource, byte baseNum)
87 {
88 if (location >7|| location <0)
89 {
90 thrownew FormatException("location params error!type range(0-7)");
91 }
92 bool locationValue=GetTargetBit(location, byteSource)==1?true:false;
93 if (locationValue != value)
94 {
95 return (byte)(value ? byteSource + baseNum : byteSource - baseNum);
96 }
97 return byteSource;
98 }
99 
100 ///<summary>
101 /// 替换一批byteSources目标位的对应的值集合
102 ///</summary>
103 ///<param name="location">替换位置(0-7)</param>
104 ///<param name="value">替换的值(1-true,0-false)</param> 
105 ///<param name="byteSources">一批字节</param>
106 ///<returns>替换后一一对应的值</returns>
107 publicstaticbyte[] ReplaceTargetBit(short location, bool value, paramsbyte[] byteSources)
108 {
109 if (byteSources ==null) returnnull;
110 int bsLen = byteSources.Length;
111 Byte baseNum = (byte)(Math.Pow(2, location +1) /2);
112 byte[] result =newbyte[bsLen];
113 for (int i =0; i < bsLen; i++)
114 {
115 result[i] = ReplaceTargetBit(location, value, byteSources[i], baseNum);
116 }
117 return result;
118 }
119 
120 #endregion
121 }
122 }