发信人: garfieldmao()
整理人: winsy(2003-03-09 13:23:08), 站内信件
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Encode和Decode的函数都有了,这么明显,会用了吧:)
Const sBASE_64_CHARACTERS = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"
Function Base64decode(ByVal asContents)
Dim lsResult
Dim lnPosition
Dim lsGroup64, lsGroupBinary
Dim Char1, Char2, Char3, Char4
Dim Byte1, Byte2, Byte3
If Len(asContents) Mod 4 > 0 Then asContents = asContents & String(4 - (Len(asContents) Mod 4), " ")
lsResult = ""
For lnPosition = 1 To Len(asContents) Step 4
lsGroupBinary = ""
lsGroup64 = Mid(asContents, lnPosition, 4)
Char1 = InStr(sBASE_64_CHARACTERS, Mid(lsGroup64, 1, 1)) - 1
Char2 = InStr(sBASE_64_CHARACTERS, Mid(lsGroup64, 2, 1)) - 1
Char3 = InStr(sBASE_64_CHARACTERS, Mid(lsGroup64, 3, 1)) - 1
Char4 = InStr(sBASE_64_CHARACTERS, Mid(lsGroup64, 4, 1)) - 1
Byte1 = Chr(((Char2 And 48) \ 16) Or (Char1 * 4) And &HFF)
Byte2 = lsGroupBinary & Chr(((Char3 And 60) \ 4) Or (Char2 * 16) And &HFF)
Byte3 = Chr((((Char3 And 3) * 64) And &HFF) Or (Char4 And 63))
lsGroupBinary = Byte1 & Byte2 & Byte3
lsResult = lsResult + lsGroupBinary
Next
Base64decode = lsResult
End Function
Function Base64encode(ByVal asContents)
Dim lnPosition
Dim lsResult
Dim Char1
Dim Char2
Dim Char3
Dim Char4
Dim Byte1
Dim Byte2
Dim Byte3
Dim SaveBits1
Dim SaveBits2
Dim lsGroupBinary
Dim lsGroup64
If Len(asContents) Mod 3 > 0 Then asContents = asContents & String(3 - (Len(asContents) Mod 3), " ")
lsResult = ""
For lnPosition = 1 To Len(asContents) Step 3
lsGroup64 = ""
lsGroupBinary = Mid(asContents, lnPosition, 3)
Byte1 = Asc(Mid(lsGroupBinary, 1, 1)): SaveBits1 = Byte1 And 3
Byte2 = Asc(Mid(lsGroupBinary, 2, 1)): SaveBits2 = Byte2 And 15
Byte3 = Asc(Mid(lsGroupBinary, 3, 1))
Char1 = Mid(sBASE_64_CHARACTERS, ((Byte1 And 252) \ 4) + 1, 1)
Char2 = Mid(sBASE_64_CHARACTERS, (((Byte2 And 240) \ 16) Or (SaveBits1 * 16) And &HFF) + 1, 1)
Char3 = Mid(sBASE_64_CHARACTERS, (((Byte3 And 192) \ 64) Or (SaveBits2 * 4) And &HFF) + 1, 1)
Char4 = Mid(sBASE_64_CHARACTERS, (Byte3 And 63) + 1, 1)
lsGroup64 = Char1 & Char2 & Char3 & Char4
lsResult = lsResult + lsGroup64
Next
Base64encode = lsResult
End Function
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看到了吗?就是这个QQ在线面板,废了我两个小时online去debug,真是可恶。呵呵~迟些开放让大家来用申请好吗?不是Tencent俱乐部的会员有福了!
QQ:1251089 |
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