Summary of several useful functions of ASP coding (utf8)

1. Convert 'utf to GB-convert UTF8 encoded text into GB encoded text Copy codeThe Code is as follows: function UTF2GB (UTFStr)

For Dig = 1 to len (UTFStr)
'If the UTF8 encoded text starts with %, the conversion is performed.
If mid (UTFStr, Dig, 1) = "%" then
'Utf8 encoded text greater than 8 is converted to Chinese Characters
If len (UTFStr)> = Dig + 8 then
GBStr = GBStr & ConvChinese (mid (UTFStr, Dig, 9 ))
Dig = Dig + 8
Else
GBStr = GBStr & mid (UTFStr, Dig, 1)
End if
Else
GBStr = GBStr & mid (UTFStr, Dig, 1)
End if
Next
UTF2GB = GBStr
End function

'Utf8 encoded text will be converted to Chinese Characters
Function ConvChinese (x)
A = split (mid (x, 2), "% ")
I = 0
J = 0
For I = 0 to ubound ()
A (I) = c16to2 (A (I ))
Next
For I = 0 to ubound (A)-1
DigS = instr (A (I), "0 ")
Unicode = ""
For j = 1 to DigS-1
If j = 1 then
A (I) = right (A (I), len (A (I)-DigS)
Unicode = Unicode & A (I)
Else
I = I + 1
A (I) = right (A (I), len (A (I)-2)
Unicode = Unicode & A (I)
End if
Next

If len (c2to16 (Unicode) = 4 then
ConvChinese = ConvChinese & chrw (int ("& H" & c2to16 (Unicode )))
Else
ConvChinese = ConvChinese & chr (int ("& H" & c2to16 (Unicode )))
End if
Next
End function

'Convert binary code to hexadecimal code
Function c2to16 (x)
I = 1
For I = 1 to len (x) step 4
C2to16 = c2to16 & hex (c2to10 (mid (x, I, 4 )))
Next
End function

'Convert binary code to decimal code
Function c2to10 (x)
C2to10 = 0
If x = "0" then exit function
I = 0
For I = 0 to len (x)-1
If mid (x, len (x)-I, 1) = "1" then c2to10 = c2to10 + 2 ^ (I)
Next
End function

'Hexadecimal code converted to binary code
Function c16to2 (x)
I = 0
For I = 1 to len (trim (x ))
Tempstr = c10to2 (cint ("& h" & mid (x, I, 1 ))))
Do while len (tempstr) <4
Tempstr = "0" & tempstr
Loop
C16to2 = c16to2 & tempstr
Next
End function

'Convert decimal code to binary code
Function c10to2 (x)
Mysign = sgn (x)
X = abs (x)
DigS = 1
Do
If x <2 ^ DigS then
Exit do
Else
DigS = DigS + 1
End if
Loop
Tempnum = x

I = 0
For I = DigS to 1 step-1
If tempnum> = 2 ^ (I-1) then
Tempnum = tempnum-2 ^ (I-1)
C10to2 = c10to2 & "1"
Else
C10to2 = c10to2 & "0"
End if
Next
If mysign =-1 then c10to2 = "-" & c10to2
End function

2. Convert 'gb to UTF8-convert the GB-encoded text into UTF8-encoded textCopy codeThe Code is as follows: Function toUTF8 (szInput)
Dim wch, uch, szRet
Dim x
Dim nAsc, nAsc2, nAsc3
'Exit the function if the input parameter is null.
If szInput = "" Then
ToUTF8 = szInput
Exit Function
End If
'Start Conversion
For x = 1 To Len (szInput)
'Use the mid function to split the GB encoded text
Wch = Mid (szInput, x, 1)
'Use the ascW function to return the Unicode character code of each GB encoded text
'Note: the asc function returns the ANSI character code. Note the difference.
NAsc = AscW (wch)
If nAsc <0 Then nAsc = nAsc ++ 65536

If (nAsc And & HFF80) = 0 Then
SzRet = szRet & wch
Else
If (nAsc And & HF000) = 0 Then
Uch = "%" & Hex (nAsc \ 2 ^ 6) Or & HC0) & Hex (nAsc And & H3F Or & H80)
SzRet = szRet & uch
Else
'Unicode character codes of GB encoded text use a three-byte template Between 0800-FFFF
Uch = "%" & Hex (nAsc \ 2 ^ 12) Or & HE0) & "% "&_
Hex (nAsc \ 2 ^ 6) And & H3F Or & H80) & "% "&_
Hex (nAsc And & H3F Or & H80)
SzRet = szRet & uch
End If
End If
Next

ToUTF8 = szRet
End Function

3. Convert 'gb to unicode-convert the GB-encoded text to the unicode-encoded textCopy codeThe Code is as follows: function chinese2unicode (Str)
Dim I
Dim Str_one
Dim Str_unicode
If (isnull (Str) then
Exit function
End if
For I = 1 to len (Str)
Str_one = Mid (Str, I, 1)
Str_unicode = Str_unicode & chr (38)
Str_unicode = Str_unicode & chr (35)
Str_unicode = Str_unicode & chr (1, 120)
Str_unicode = Str_unicode & Hex (ascw (Str_one ))
Str_unicode = Str_unicode & chr (59)
Next
Chinese2unicode = Str_unicode
End function

4. 'url DecodingCopy codeThe Code is as follows: Function URLDecode (enStr)
Dim deStr
Dim c, I, v
DeStr = ""
For I = 1 to len (enStr)
C = Mid (enStr, I, 1)
If c = "%" then
V = eval ("& h" + Mid (enStr, I + 1, 2 ))
If v <128 then
DeStr = deStr & chr (v)
I = I + 2
Else
If isvalidhex (mid (enstr, I, 3) then
If isvalidhex (mid (enstr, I + 3, 3) then
V = eval ("& h" + Mid (enStr, I + 1, 2) + Mid (enStr, I + 4, 2 ))
DeStr = deStr & chr (v)
I = I + 5
Else
V = eval ("& h" + Mid (enStr, I + 1, 2) + cstr (hex (asc (Mid (enStr, I + 3, 1 )))))
DeStr = deStr & chr (v)
I = I + 3
End if
Else
Destr = destr & c
End if
End if
Else
If c = "+" then
DeStr = deStr &""
Else
DeStr = deStr & c
End if
End if
Next
URLDecode = deStr
End function

'Determine whether the hexadecimal code is valid
Function isvalidhex (str)
Dim c
Isvalidhex = true
Str = ucase (str)
If len (str) <> 3 then isvalidhex = false: exit function
If left (str, 1) <> "%" then isvalidhex = false: exit function
C = mid (str, 2, 1)
If not (c> = "0") and (c <= "9") or (c> = "") and (c <= "Z") then isvalidhex = false: exit function
C = mid (str, 3,1)
If not (c> = "0") and (c <= "9") or (c> = "") and (c <= "Z") then isvalidhex = false: exit function
End function
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