1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 | '功能： 将字节变量循环左移n位'入口参数：MoveByte 需要移位的字节变量' n 移动的位数'返回值： 移位后的字节变量Public Function ByteLeftMove(MoveByte As Byte, N As Integer) As ByteDim Intem As Byte '临时变量Dim Intem1 As Byte '临时变量Dim x As Integer, y As Integer Intem1 = MoveByte For x = 1 To N '移多少位就循环多少次 For y = 8 To 1 Step -1 '从第八位(左边第一位)开始循环左移 Select Case y Case 8 '如果临时变量intem1的第八位是1, If (Intem1 And &H80) = &H80 Then '则将临时变量intem置1, Intem = &H1 Else Intem = &H0 '反之置0 End If Case 7 '如果临时变量intem1的第七位是1, If (Intem1 And &H40) = &H40 Then '则将其第八位置1(其它位不变), Intem1 = Intem1 Or &H80 Else '反之将第八位置0(其它位不变) Intem1 = Intem1 And &H7F End If Case 6 '操作与上面相同 If (Intem1 And &H20) = &H20 Then Intem1 = Intem1 Or &H40 Else Intem1 = Intem1 And &HBF End If Case 5 If (Intem1 And &H10) = &H10 Then Intem1 = Intem1 Or &H20 Else Intem1 = Intem1 And &HDF End If Case 4 If (Intem1 And &H8) = &H8 Then Intem1 = Intem1 Or &H10 Else Intem1 = Intem1 And &HEF End If Case 3 If (Intem1 And &H4) = &H4 Then Intem1 = Intem1 Or &H8 Else Intem1 = Intem1 And &HF7 End If Case 2 If (Intem1 And &H2) = &H2 Then Intem1 = Intem1 Or &H4 Else Intem1 = Intem1 And &HFB End If Case 1 If (Intem1 And &H1) = &H1 Then Intem1 = Intem1 Or &H2 Else Intem1 = Intem1 And &HFD End If If Intem = &H1 Then '移完第一位后,如果intem是1(即第八位是1) Intem1 = Intem1 Or &H1 '则将intem1的第一位置1 Else Intem1 = Intem1 And &HFE '反之置0 End If End Select Next y Next x ByteLeftMove = Intem1 '将intem1的值返回给函数名End Function'功能： 将字节变量循环右移n位'入口参数：MoveByte 需要移位的字节变量' n 移动的位数'返回值： 移位后的字节变量Public Function ByteRightMOve(MoveByte As Byte, N As Integer) As ByteDim Intem As Byte '临时变量Dim Intem1 As Byte '临时变量Dim x As Integer, y As Integer Intem1 = MoveByte For x = 1 To N '移多少位就循环多少次 For y = 1 To 8 Step 1 '从第一位(右边第一位)开始循环右移 Select Case y Case 1 '如果临时变量intem1的第一位是1, If (Intem1 And &H1) = &H1 Then '则将临时变量intem置1, Intem = &H1 Else Intem = &H0 '反之置0 End If Case 2 '如果临时变量intem1的第二位是1, If (Intem1 And &H2) = &H2 Then '则将其第一位置1(其它位不变), Intem1 = Intem1 Or &H1 Else '反之将第一位置0(其它位不变) Intem1 = Intem1 And &HFE End If Case 3 '操作与上面相同 If (Intem1 And &H4) = &H4 Then Intem1 = Intem1 Or &H2 Else Intem1 = Intem1 And &HFD End If Case 4 If (Intem1 And &H8) = &H8 Then Intem1 = Intem1 Or &H4 Else Intem1 = Intem1 And &HFB End If Case 5 If (Intem1 And &H10) = &H10 Then Intem1 = Intem1 Or &H8 Else Intem1 = Intem1 And &HF7 End If Case 6 If (Intem1 And &H20) = &H20 Then Intem1 = Intem1 Or &H10 Else Intem1 = Intem1 And &HEF End If Case 7 If (Intem1 And &H40) = &H40 Then Intem1 = Intem1 Or &H20 Else Intem1 = Intem1 And &HDF End If Case 8 If (Intem1 And &H80) = &H80 Then Intem1 = Intem1 Or &H40 Else Intem1 = Intem1 And &HBF End If If Intem = &H1 Then '移完第八位后,如果intem是1(即第一位是1) Intem1 = Intem1 Or &H80 '则将intem1的第八位置1 Else Intem1 = Intem1 And &H7F '反之置0 End If End Select Next y Next x ByteRightMOve = Intem1 '将intem1的值返回给函数名End Function'功能： 将字节数据的某一位置 1 或置 0'入口参数： ByteData 数据 ' BitNumber 位号' BitHandleType 位操作类型 0 置0 ， 1 置1'返回值： 处理后的字节数据Public Function BitHandle(ByVal BitHandleType As Long, ByVal ByteData As Byte, ByVal BitNumber As Long) As Byte Select Case BitHandleType '置0 Case 0 Select Case BitNumber '1位 Case 1 BitHandle = ByteData And &HFE '2位 Case 2 BitHandle = ByteData And &HFD '3位 Case 3 BitHandle = ByteData And &HFB '4位 Case 4 BitHandle = ByteData And &HF7 '5位 Case 5 BitHandle = ByteData And &HEF '6位 Case 6 BitHandle = ByteData And &HDF '7位 Case 7 BitHandle = ByteData And &HBF '8位 Case 8 BitHandle = ByteData And &H7F End Select '置1 Case 1 Select Case BitNumber '1位 Case 1 BitHandle = ByteData Or &H1 '2位 Case 2 BitHandle = ByteData Or &H2 '3位 Case 3 BitHandle = ByteData Or &H4 '4位 Case 4 BitHandle = ByteData Or &H8 '5位 Case 5 BitHandle = ByteData Or &H10 '6位 Case 6 BitHandle = ByteData Or &H20 '7位 Case 7 BitHandle = ByteData Or &H40 '8位 Case 8 BitHandle = ByteData Or &H80 End Select End SelectEnd Function'功能： 判断字节数据的某一位是 0 还是 1'入口参数： ByteData 数据' BitNumber位号'返回值： 检测位的数据Public Function CheckBit(ByVal ByteData As Byte, BitNumber As Long) As Byte Select Case BitNumber '1位 Case 1 If (ByteData And &H1) = &H1 Then CheckBit = 1 Else CheckBit = 0 End If '2位 Case 2 If (ByteData And &H2) = &H2 Then CheckBit = 1 Else CheckBit = 0 End If '3位 Case 3 If (ByteData And &H4) = &H4 Then CheckBit = 1 Else CheckBit = 0 End If '4位 Case 4 If (ByteData And &H8) = &H8 Then CheckBit = 1 Else CheckBit = 0 End If '5位 Case 5 If (ByteData And &H10) = &H10 Then CheckBit = 1 Else CheckBit = 0 End If '6位 Case 6 If (ByteData And &H20) = &H20 Then CheckBit = 1 Else CheckBit = 0 End If '7位 Case 7 If (ByteData And &H40) = &H40 Then CheckBit = 1 Else CheckBit = 0 End If '8位 Case 8 If (ByteData And &H80) = &H80 Then CheckBit = 1 Else CheckBit = 0 End If End SelectEnd Function |
