Zig 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.

Zig

const std = @import("std");
const chilkat = @import("chilkat");

pub fn main(init: std.process.Init) !void {
    const alloc = init.arena.allocator();

    // Open an existing ZIP archive.
    const zip = try chilkat.Zip.init();
    defer zip.deinit();

    zip.openZip("example.zip") catch {
        std.debug.print("{s}\n", .{try zip.getLastErrorText(alloc)});
        return;
    };

    // Get the total number of entries in the ZIP archive.
    const num_entries = zip.getNumEntries();

    std.debug.print("Number of ZIP entries = {d}\n", .{num_entries});

    // Create a ZipEntry object that will be reused
    // for each entry retrieved by EntryAt.
    const entry = try chilkat.ZipEntry.init();
    defer entry.deinit();

    // Iterate over all ZIP entries.
    var i: i32 = 0;
    while (i < num_entries) {
        // Retrieve the entry at index i.
        zip.entryAt(i, entry) catch {
            std.debug.print("{s}\n", .{try zip.getLastErrorText(alloc)});
            return;
        };

        std.debug.print("Entry {d}\n", .{i});
        std.debug.print("  FileName: {s}\n", .{try entry.getFileName(alloc)});
        std.debug.print("  Uncompressed Length: {d}\n", .{entry.getUncompressedLength()});
        std.debug.print("  Compressed Length: {d}\n", .{entry.getCompressedLength()});
        std.debug.print("\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
    //

    zip.closeZip();

    std.debug.print("Done.\n", .{});
}