PowerBuilder

Deflate File

Demonstrates how to use the Deflate compression algorithm to compress a file. (The deflate compression algorithm is the most commonly used in the Zip archive file format.)

This code is capable of compressing any size file because the file data is compressed from input to output in a streaming mode. The output file contains only the deflated data (it is not a .zip, and there is no file structure or format).

PowerBuilder

integer li_rc
integer li_Success
oleobject loo_Compress

li_Success = 0

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

loo_Compress = create oleobject
li_rc = loo_Compress.ConnectToNewObject("Chilkat.Compression")
if li_rc < 0 then
    destroy loo_Compress
    MessageBox("Error","Connecting to COM object failed")
    return
end if

loo_Compress.Algorithm = "deflate"

// Deflate this XML file:
li_Success = loo_Compress.CompressFile("hamlet.xml","hamletDeflate.dat")
if li_Success <> 1 then
    Write-Debug loo_Compress.LastErrorText
    destroy loo_Compress
    return
end if

// Inflate back to the original:
li_Success = loo_Compress.DecompressFile("hamletDeflate.dat","hamletInflated.xml")
if li_Success <> 1 then
    Write-Debug loo_Compress.LastErrorText
    destroy loo_Compress
    return
end if

Write-Debug "Success!"


destroy loo_Compress