Zig

Iterate over Direct Children with a Specific Tag

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Demonstrates how to iterate over direct children having a specific tag.

The input XML, available at http://www.chilkatsoft.com/data/fruit.xml, is this:

<root>
    <fruit color="red">apple</fruit>
    <fruit color="green">pear</fruit>
    <veg color="orange">carrot</veg>
    <meat animal="cow">beef</meat>
    <xyz>
        <fruit color="blue">blueberry</fruit>
        <veg color="green">broccoli</veg>
    </xyz>
    <fruit color="purple">grape</fruit>
    <cheese color="yellow">cheddar</cheese>
</root>

Zig

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

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

    const xml = try chilkat.Xml.init();
    defer xml.deinit();
    var i: i32 = 0;

    // The sample input XML is available at http://www.chilkatsoft.com/data/fruit.xml
    xml.loadXmlFile("fruit.xml") catch {
        std.debug.print("{s}\n", .{try xml.getLastErrorText(alloc)});
        return;
    };

    //  Get the number of direct children having the tag "fruit";
    const num_with_tag = xml.numChildrenHavingTag("fruit");

    if (num_with_tag > 0) {
        i = 0;
        while (i < num_with_tag) : (i += 1) {
            const child = try xml.getNthChildWithTag("fruit", i);
            defer child.deinit();
            std.debug.print("{d}: {s} : {s}\n", .{ i, try child.getTag(alloc), try child.getContent(alloc) });
        }

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

        // Do the same as the above loop, but instead of creating
        // a new object instance for each child, call GetNthChildWithTag2 to
        // update the object's reference instead.
        i = 0;
        while (i < num_with_tag) : (i += 1) {
            // Navigate to the Nth child.
            try xml.getNthChildWithTag2("fruit", i);
            std.debug.print("{d}: {s} : {s}\n", .{ i, try xml.getTag(alloc), try xml.getContent(alloc) });
            // Navigate back up to the parent:
            try xml.getParent2();
        }

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