(PureBasic) Append Dir Tree to Existing Zip w/out Rewriting Entire Zip

Demonstrates how to use the QuickAppend method to append a directory tree to an existing .zip archive. This method works by editing the existing .zip -- it does not rewrite or recompress the contents of the existing .zip. It is the fastest way to append additional files to a pre-existing large .zip archive. Note: The QuickAppend method is new and available in the pre-release downloads, or in official releases dated after 6-October-2007.

Chilkat PureBasic Module Download Chilkat PureBasic Module

IncludeFile "CkZip.pb"

Procedure ChilkatExample()

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

    zip.i = CkZip::ckCreate()
    If zip.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    ; The NewZip method only initializes the Zip object -- it does
    ; not create or write a .zip file.
    success.i = CkZip::ckNewZip(zip,"notUsed.zip")
    If success <> 1
        Debug CkZip::ckLastErrorText(zip)
        CkZip::ckDispose(zip)
        ProcedureReturn
    EndIf

    ; Add a references to all files in a directory tree.
    ; Note: this does not read or compress the file contents --
    ; it simply adds file references to the zip object.
    recurse.i = 1
    success = CkZip::ckAppendFiles(zip,"c:/temp/abc123/*",recurse)
    If success <> 1
        Debug CkZip::ckLastErrorText(zip)
        CkZip::ckDispose(zip)
        ProcedureReturn
    EndIf

    ; Appends the contents of the zip object to the preExisting.zip
    ; zip archive.  preExisting.zip is opened, and the files
    ; referenced by this zip object are streamed in, compressed,
    ; and appended to the end of the archive.
    success = CkZip::ckQuickAppend(zip,"preExisting.zip")
    If success <> 1
        Debug CkZip::ckLastErrorText(zip)
        CkZip::ckDispose(zip)
        ProcedureReturn
    EndIf

    Debug "Success!"

    ; Note: Additional files, directory trees, or in-memory data
    ; can be appended by calling AppendOneFileOrDir, AppendFiles,
    ; AppendString, AppendData, etc. multiple times.
    ; Whatever files and/or in-memory data that are referenced by
    ; this zip object will be appended to preExisting.zip when
    ; QuickAppend is called


    CkZip::ckDispose(zip)


    ProcedureReturn
EndProcedure