C Requires Chilkat v11.0.0+

Iterate Over ZIP Entries Using EntryAt

This example demonstrates how to use the EntryAt method to iterate over all entries contained within a ZIP archive.

The EntryAt method retrieves a ZipEntry object for a given zero-based index.

This is useful for:

• Enumerating all entries in a ZIP archive
• Inspecting filenames, sizes, and timestamps
• Searching or filtering ZIP contents

Suppose the ZIP archive contains:

docs/readme.txt
images/logo.png
data/config.json

The example loops through all ZIP entries and prints information about each entry.

C

#include <C_CkZip.h>
#include <C_CkZipEntry.h>

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

    success = FALSE;

    //  Open an existing ZIP archive.
    zip = CkZip_Create();

    success = CkZip_OpenZip(zip,"example.zip");
    if (success == FALSE) {
        printf("%s\n",CkZip_lastErrorText(zip));
        CkZip_Dispose(zip);
        return;
    }

    //  Get the total number of entries in the ZIP archive.
    numEntries = CkZip_getNumEntries(zip);

    printf("Number of ZIP entries = %d\n",numEntries);

    //  Create a ZipEntry object that will be reused
    //  for each entry retrieved by EntryAt.
    entry = CkZipEntry_Create();

    //  Iterate over all ZIP entries.
    i = 0;
    while (i < numEntries) {

        //  Retrieve the entry at index i.
        success = CkZip_EntryAt(zip,i,entry);
        if (success == FALSE) {
            printf("%s\n",CkZip_lastErrorText(zip));
            CkZip_Dispose(zip);
            CkZipEntry_Dispose(entry);
            return;
        }

        printf("Entry %d\n",i);
        printf("  FileName: %s\n",CkZipEntry_fileName(entry));
        printf("  Uncompressed Length: %u\n",CkZipEntry_getUncompressedLength(entry));
        printf("  Compressed Length: %u\n",CkZipEntry_getCompressedLength(entry));
        printf("\n");

        i = i + 1;
    }

    //  Sample output:
    //  
    //  Entry 0
    //    FileName: docs/readme.txt
    //    Uncompressed Length: 1204
    //    Compressed Length: 512
    //  
    //  Entry 1
    //    FileName: images/logo.png
    //    Uncompressed Length: 84211
    //    Compressed Length: 84102
    //  

    CkZip_CloseZip(zip);

    printf("Done.\n");


    CkZip_Dispose(zip);
    CkZipEntry_Dispose(entry);

    }