(PowerShell) Ascii85 Encoding and Decoding

Demonstrates ascii85 encoding and decoding.

Note: Requires Chilkat v9.5.0.79 or greater.

Chilkat .NET Downloads Chilkat .NET Assemblies

Add-Type -Path "C:\chilkat\ChilkatDotNet47-9.5.0-x64\ChilkatDotNet47.dll"

# First demonstrate encoding strings to ascii85 and back.
$sb = New-Object 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")
$($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()
$sb.Append($encodedAscii85)
$success = $sb.Decode("ascii85","utf-8")
$("Original:")
$($sb.GetAsString())

# ---- Now encode binary data to ascii85 ----
$bd = New-Object Chilkat.BinData
$success = $bd.LoadFile("qa_data/jpg/starfish20.jpg")
$encodedAscii85 = $bd.GetEncoded("ascii85")
$($encodedAscii85)

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

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