fdt: Add absolute node path lookup function

1 files changed, 16 insertions, 0 deletions

diff --git a/src/fdt.zig b/src/fdt.zig
index 67efb53..2139807 100644
--- a/src/fdt.zig
+++ b/src/fdt.zig
@@ -186,6 +186,22 @@ pub fn findNodeExact(nodes: []const Node, name: []const u8) ?struct { usize, Nod
     return null;
 }
 
+pub fn findPath(dt: *const Tree, path: []const u8) ?Node {
+    if (dt.nodes.items.len < 1) return null;
+
+    path = std.mem.trim(u8, path, "/");
+
+    var node = dt.nodes.items[0];
+
+    for (std.mem.tokenizeScalar(u8, path, '/')) |segment| {
+        if (findNodeExact(node.subnodes.items, segment)) |result| {
+            node = result;
+        } else return null;
+    }
+
+    return node;
+}
+
 fn nodeNameFilter(node: Node, name: []const u8) bool {
     var it = std.mem.splitScalar(u8, node.name, '@');
     const trueName = it.first();