+local function s(t, n, results, _end, ...)
+ if t == nil then return; end
+ local k = select(n, ...);
+ if n == _end then
+ if k == nil then
+ for _, v in pairs(t) do
+ t_insert(results, v);
+ end
+ else
+ t_insert(results, t[k]);
+ end
+ return;
+ end
+ if k then
+ local v = t[k];
+ if v then
+ s(v, n+1, results, _end, ...);
+ end
+ else
+ for _,b in pairs(t) do
+ s(b, n+1, results, _end, ...);
+ end
+ end
+end
+
+-- Search for keys, nil == wildcard
+local function search(self, ...)
+ local _end = select('#', ...);
+ for n = _end,1 do
+ if select(n, ...) then _end = n; break; end
+ end
+ local results = {};
+ s(self.data, 1, results, _end, ...);
+ return results;
+end
+
+-- Append results to an existing list
+local function search_add(self, results, ...)
+ if not results then results = {}; end
+ local _end = select('#', ...);
+ for n = _end,1 do
+ if select(n, ...) then _end = n; break; end
+ end
+ s(self.data, 1, results, _end, ...);
+ return results;
+end
+