Unzip Selected Files from a Zip Archive

Demonstrates how to iterate over the files contained within a .zip and unzip specific files.

Downloads:

MS Windows Visual C/C++ Libraries

Linux/CentOS C/C++ Libraries

MAC OS X C/C++ Libraries

Solaris C/C++ Libraries

C++ Builder Libraries

// Needs #include <CkZip.h>
// Needs #include <CkZipEntry.h>

    CkString strOut;

    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) {
        strOut.append(zip.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    success = zip.OpenZip("my_photos.zip");
    if (success != true) {
        strOut.append(zip.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    const char * unzipDir;
    unzipDir = "c:/temp/unzipDir";

    long n;

    //  Get the number of files and directories in the .zip
    n = zip.get_NumEntries();
    strOut.appendInt(n);
    strOut.append("\r\n");

    CkZipEntry *entry = 0;

    long i;
    for (i = 0; i <= n - 1; i++) {

        entry = zip.GetEntryByIndex(i);
        if (entry->get_IsDirectory() == false) {
            //  (the filename may include a path)
            strOut.append(entry->fileName());
            strOut.append("\r\n");

            //  Your application may choose to unzip this entry
            //  based on the filename.
            //  If the entry should be unzipped, then call Extract(unzipDir)
            success = entry->Extract(unzipDir);
            if (success != true) {
                strOut.append(entry->lastErrorText());
                strOut.append("\r\n");
                SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
                return;
            }

        }

        delete entry;
    }


    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());