(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.

Chilkat C/C++ Library Downloads
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#include <C_CkZip.h>
#include <C_CkZipEntry.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkZip zip;
    HCkZipEntry entry;

    success = FALSE;

    zip = CkZip_Create();

    // Open an existing ZIP archive.
    success = CkZip_OpenZip(zip,"c:/temp/example.zip");
    if (success == FALSE) {
        printf("%s\n",CkZip_lastErrorText(zip));
        CkZip_Dispose(zip);
        return;
    }

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

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

        CkZip_CloseZip(zip);
        CkZip_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 = CkZipEntry_Create();

    success = CkZip_EntryAt(zip,0,entry);
    if (success == FALSE) {
        printf("%s\n",CkZip_lastErrorText(zip));
        CkZip_Dispose(zip);
        CkZipEntry_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 (CkZipEntry_getIsDirectory(entry) == TRUE) {

            printf("[Directory] %s\n",CkZipEntry_fileName(entry));

        }
        else {

            printf("[File] %s\n",CkZipEntry_fileName(entry));
        }

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

    CkZip_CloseZip(zip);

    printf("Done.\n");


    CkZip_Dispose(zip);
    CkZipEntry_Dispose(entry);

    }