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.

Download Chilkat C++ Libraries for VC++ 8.0 / Win32

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#include <CkZip.h>

void ChilkatSample(void)
    {
    CkZip zip;

    bool success;

    //  Any string unlocks the component for the 1st 30-days.
    success = zip.UnlockComponent("Anything for 30-day trial");
    if (success != true) {
        printf("%s\n",zip.lastErrorText());
        return;
    }

    //  The NewZip method only initializes the Zip object -- it does
    //  not create or write a .zip file.
    success = zip.NewZip("notUsed.zip");
    if (success != true) {
        printf("%s\n",zip.lastErrorText());
        return;
    }

    //  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.
    bool recurse;
    recurse = true;
    success = zip.AppendFiles("c:/temp/abc123/*",recurse);
    if (success != true) {
        printf("%s\n",zip.lastErrorText());
        return;
    }

    //  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 = zip.QuickAppend("preExisting.zip");
    if (success != true) {
        printf("%s\n",zip.lastErrorText());
        return;
    }

    printf("Success!\n");

    //  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.

    }