Unicode C

Iterate Through ZIP Entries Using EntryAt and ZipEntry.GetNext

See more Zip Examples

This example demonstrates how to iterate through all entries in a ZIP archive using:

• Zip.EntryAt to obtain the first entry
• ZipEntry.GetNext to advance through the remaining entries

The example prints each ZIP entry's stored filename and whether the entry is a file or directory.

This approach is useful when sequentially processing ZIP entries without repeatedly calling EntryAt by index.

Suppose the ZIP archive contains:

docs/
docs/readme.txt
images/logo.png
hello.txt

The example iterates through each entry in the order stored within the ZIP archive.

Unicode C

#include <C_CkZipW.h>
#include <C_CkZipEntryW.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkZipW zip;
    HCkZipEntryW entry;

    success = FALSE;

    zip = CkZipW_Create();

    // Open an existing ZIP archive.
    success = CkZipW_OpenZip(zip,L"c:/temp/example.zip");
    if (success == FALSE) {
        wprintf(L"%s\n",CkZipW_lastErrorText(zip));
        CkZipW_Dispose(zip);
        return;
    }

    // A ZIP archive may contain zero entries.
    if (CkZipW_getNumEntries(zip) == 0) {

        wprintf(L"The ZIP archive is empty.\n");

        CkZipW_CloseZip(zip);
        CkZipW_Dispose(zip);
        return;
    }

    // ------------------------------------------------------------
    // Get the first ZIP entry.
    // 
    // EntryAt(0,entry) initializes the ZipEntry object so that
    // it represents the first entry in the ZIP archive.
    // 
    entry = CkZipEntryW_Create();

    success = CkZipW_EntryAt(zip,0,entry);
    if (success == FALSE) {
        wprintf(L"%s\n",CkZipW_lastErrorText(zip));
        CkZipW_Dispose(zip);
        CkZipEntryW_Dispose(entry);
        return;
    }

    // ------------------------------------------------------------
    // Iterate through all ZIP entries.
    // 
    // GetNext updates the same ZipEntry object so that it
    // represents the next entry in the ZIP archive.
    // 
    while ((success == TRUE)) {

        if (CkZipEntryW_getIsDirectory(entry) == TRUE) {

            wprintf(L"[Directory] %s\n",CkZipEntryW_fileName(entry));

        }
        else {

            wprintf(L"[File] %s\n",CkZipEntryW_fileName(entry));
        }

        // Advance to the next entry.
        success = CkZipEntryW_GetNext(entry);
    }

    CkZipW_CloseZip(zip);

    wprintf(L"Done.\n");


    CkZipW_Dispose(zip);
    CkZipEntryW_Dispose(entry);

    }