常用ASP自定义函数全集(6)_ASP教程

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'UTF8编码文字将转换为汉字
function ConvChinese(x)
    A=split(mid(x,2),"%")
    i=0
    j=0
   for i=0 to ubound(A)
      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

'二进制代码转换为十六进制代码
function c2to16(x)
    i=1
    for i=1 to len(x) step 4
       c2to16=c2to16 & hex(c2to10(mid(x,i,4)))
    next
end function

'二进制代码转换为十进制代码
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

'十六进制代码转换为二进制代码
function c16to2(x)
     i=0
     for i=1 to len(trim(x))
       tempstr= c10to2(cint(int("&h" & mid(x,i,1))))
       do while len(tempstr)<4
          tempstr="0" & tempstr
       loop
       c16to2=c16to2 & tempstr
    next
end function

'十进制代码转换为二进制代码
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
'-------------------------------
'GB转UTF8--将GB编码文字转换为UTF8编码文字
Function toUTF8(szInput)
     Dim wch, uch, szRet
     Dim x
     Dim nAsc, nAsc2, nAsc3
     '如果输入参数为空，则退出函数
     If szInput = "" Then
         toUTF8 = szInput
         Exit Function
     End If
     '开始转换
      For x = 1 To Len(szInput)
         '利用mid函数分拆GB编码文字
         wch = Mid(szInput, x, 1)
         '利用ascW函数返回每一个GB编码文字的Unicode字符代码
         '注：asc函数返回的是ANSI 字符代码，注意区别
         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
                'GB编码文字的Unicode字符代码在0800 - FFFF之间采用三字节模版
                 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

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