VBScript

Ascii85 Encoding and Decoding

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Demonstrates ascii85 encoding and decoding.

Note: Requires Chilkat v9.5.0.79 or greater.

VBScript

Dim fso, outFile
Set fso = CreateObject("Scripting.FileSystemObject")
'Create a Unicode (utf-16) output text file.
Set outFile = fso.CreateTextFile("output.txt", True, True)

success = 0

' First demonstrate encoding strings to ascii85 and back.
set sb = CreateObject("Chilkat.StringBuilder")

success = sb.Append("Man is distinguished, not only by his reason, but by this singular passion from other animals, which is a lust of the mind, that by a perseverance of delight in the continued and indefatigable generation of knowledge, exceeds the short vehemence of any carnal pleasure.")

encodedAscii85 = sb.GetEncoded("ascii85","utf-8")
outFile.WriteLine(encodedAscii85)

' Result is: 9jqo^BlbD-BleB1DJ+*+F(f,q/0JhKF<GL>Cj@.4 ... DII?(E,9)oF*2M7/c

' Decode back to the original:
sb.Clear 
success = sb.Append(encodedAscii85)
success = sb.Decode("ascii85","utf-8")
outFile.WriteLine("Original:")
outFile.WriteLine(sb.GetAsString())

' ---- Now encode binary data to ascii85 ----
set bd = CreateObject("Chilkat.BinData")
success = bd.LoadFile("qa_data/jpg/starfish20.jpg")
encodedAscii85 = bd.GetEncoded("ascii85")
outFile.WriteLine(encodedAscii85)

' Result is:  s4IA0!"_al8O`[\!<E0k!([(is8E!F7VQ[M+Eqj?FED)3+C]U=6"Fn ...

' Decode...
success = bd.Clear()
success = bd.AppendEncoded(encodedAscii85,"ascii85")
success = bd.WriteFile("qa_output/starfish20.jpg")

outFile.Close