(Unicode C++) Replace/Update a FIle in a .zip

Demonstrates how to replace/update a file from a .zip. Note: This requires the entire .zip to be rewritten.

Note: This example requires Chilkat v11.0.0 or greater.

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#include <CkZipW.h>
#include <CkZipEntryW.h>

void ChilkatSample(void)
    {
    bool success = false;

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

    // First prepare a .zip and write it..
    CkZipW zip;

    zip.NewZip(L"qa_output/abc.zip");

    // Add some files..
    const wchar_t *charset = L"utf-8";
    zip.AddString(L"a.txt",L"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",charset);
    zip.AddString(L"b.txt",L"bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb",charset);
    zip.AddString(L"c.txt",L"cccccccccccccccccccccccccccccccccccc",charset);

    // Write to qa_output/abc.zip
    // This .zip contains three files: a.txt, b.txt, and c.txt
    success = zip.WriteZipAndClose();

    // -------------------------------------------------------------------
    // Open abc.zip, replace the content of the "b.txt" entry with something else, and re-write.
    CkZipW zip2;
    zip2.OpenZip(L"qa_output/abc.zip");

    CkZipEntryW entry;
    if (zip2.EntryOf(L"b.txt",entry) == true) {
        entry.ReplaceString(L"This is the new content.  bbbbbbbbbbbbbbbbbbbbbb",L"utf-8");
    }

    // Write the modified .zip back to "abc.zip"
    success = zip2.WriteZipAndClose();

    wprintf(L"success.\n");
    }