92 lines
1.7 KiB
Lua
92 lines
1.7 KiB
Lua
local util = {}
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function util.table_set_all(t, other_table)
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for key, value in pairs(other_table) do
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t[key] = value
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end
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return t
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end
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function util.table_is_empty(t)
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return next(t) == nil
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end
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function util.table_sort_keys(t, sort_function)
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local sorted = {}
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for key in pairs(t) do
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table.insert(sorted, key)
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end
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if sort_function then
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table.sort(sorted, sort_function)
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else
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table.sort(sorted)
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end
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return sorted
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end
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function util.table_equals(t1, t2)
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if t1 == t2 then
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return true
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end
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local tt1 = type(t1)
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local tt2 = type(t2)
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if tt1 ~= tt2 then
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return false
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end
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if tt1 ~= "table" or tt2 ~= "table" then
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return t1 == t2
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end
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for k1, v1 in pairs(t1) do
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if v1 ~= t2[k1] then
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return false
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end
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end
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for k2, v2 in pairs(t2) do
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if t1[k2] ~= v2 then
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return false
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end
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end
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return true
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end
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function util.get_location_string(inv)
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local location = inv:get_location()
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if location.type == "node" then
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return ("nodemeta:%i,%i,%i"):format(location.pos.x, location.pos.y, location.pos.z)
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elseif location.type == "player" then
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return ("player:%s"):format(location.name)
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elseif location.type == "detached" then
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return ("detached:%s"):format(location.name)
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else
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error(("unexpected location? %s"):format(dump(location)))
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end
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end
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function util.resolve_aliases(node, seen)
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seen = seen or {}
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if seen[node] then
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error(("alias loop on %s"):format(node))
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end
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local aliased_to = minetest.registered_aliases[node]
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if aliased_to then
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seen[node] = true
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return util.resolve_aliases(aliased_to, seen)
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end
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return node
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end
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function util.has_metadata(item)
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item = type(item) == "userdata" and item or ItemStack(item)
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local meta = item:get_meta()
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return not util.table_is_empty(meta:to_table().fields)
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end
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stairsplus.util = util
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