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Audit code for possible nil value indexing with unregistered nodes.

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This commit is contained in:
Anthony Zhang 2013-06-22 15:43:58 -04:00
parent ec63bd3abf
commit 96011bc718
6 changed files with 67 additions and 49 deletions
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3
mesecons/wires.lua
View File

@ -241,8 +241,7 @@ function mesecon:update_autoconnect(pos, secondcall, replace_old)
end
end
if minetest.registered_nodes["default:stone_with_mese"] == nil then
if not minetest.registered_nodes["default:stone_with_mese"] then --before MESE update, use old recipes
minetest.register_craft({
output = "mesecons:wire_00000000_off 18",
recipe = {

1
mesecons_extrawires/depends.txt
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@ -1 +1,2 @@
default
mesecons

30
mesecons_extrawires/vertical.lua
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@ -34,31 +34,23 @@ local brules =
local vertical_updatepos = function (pos)
local node = minetest.env:get_node(pos)
if minetest.registered_nodes[node.name].is_vertical_conductor then
if minetest.registered_nodes[node.name]
and minetest.registered_nodes[node.name].is_vertical_conductor then
local node_above = minetest.env:get_node(mesecon:addPosRule(pos, vrules[1]))
local node_below = minetest.env:get_node(mesecon:addPosRule(pos, vrules[2]))
local namestate = minetest.registered_nodes[node.name].vertical_conductor_state
-- above and below: vertical mesecon
if minetest.registered_nodes[node_above.name].is_vertical_conductor
and minetest.registered_nodes[node_below.name].is_vertical_conductor then
minetest.env:add_node (pos,
{name = "mesecons_extrawires:vertical_"..namestate})
local above = minetest.registered_nodes[node_above.name] and minetest.registered_nodes[node_above.name].is_vertical_conductor
local below = minetest.registered_nodes[node_below.name] and minetest.registered_nodes[node_below.name].is_vertical_conductor
-- above only: bottom
elseif minetest.registered_nodes[node_above.name].is_vertical_conductor
and not minetest.registered_nodes[node_below.name].is_vertical_conductor then
minetest.env:add_node (pos,
{name = "mesecons_extrawires:vertical_bottom_"..namestate})
-- below only: top
elseif not minetest.registered_nodes[node_above.name].is_vertical_conductor
and minetest.registered_nodes[node_below.name].is_vertical_conductor then
minetest.env:add_node (pos,
{name = "mesecons_extrawires:vertical_top_"..namestate})
if above and below then -- above and below: vertical mesecon
minetest.env:add_node(pos, {name = "mesecons_extrawires:vertical_"..namestate})
elseif above and not below then -- above only: bottom
minetest.env:add_node(pos, {name = "mesecons_extrawires:vertical_bottom_"..namestate})
elseif not above and below then -- below only: top
minetest.env:add_node(pos, {name = "mesecons_extrawires:vertical_top_"..namestate})
else -- no vertical wire above, no vertical wire below: use default wire
minetest.env:add_node (pos,
{name = "mesecons_extrawires:vertical_"..namestate})
minetest.env:add_node (pos, {name = "mesecons_extrawires:vertical_"..namestate})
end
end
end

8
mesecons_movestones/init.lua
View File

@ -92,9 +92,11 @@ minetest.register_entity("mesecons_movestones:movestone_entity", {
local direction = mesecon:get_movestone_direction(pos)
if not direction then -- no mesecon power
--push only solid nodes
local name = minetest.env:get_node(pos).name
if name ~= "air" and name ~= "ignore"
and minetest.registered_nodes[name].liquidtype == "none" then
and ((not minetest.registered_nodes[name])
or minetest.registered_nodes[name].liquidtype == "none") then
mesecon:mvps_push(pos, self.lastdir, MOVESTONE_MAXIMUM_PUSH)
end
minetest.env:add_node(pos, {name="mesecons_movestones:movestone"})
@ -176,9 +178,11 @@ minetest.register_entity("mesecons_movestones:sticky_movestone_entity", {
local direction = mesecon:get_movestone_direction(pos)
if not direction then -- no mesecon power
--push only solid nodes
local name = minetest.env:get_node(pos).name
if name ~= "air" and name ~= "ignore"
and minetest.registered_nodes[name].liquidtype == "none" then
and ((not minetest.registered_nodes[name])
or minetest.registered_nodes[name].liquidtype == "none") then
mesecon:mvps_push(pos, self.lastdir, MOVESTONE_MAXIMUM_PUSH)
--STICKY
mesecon:mvps_pull_all(pos, self.lastdir)

41
mesecons_mvps/init.lua
View File

@ -48,7 +48,8 @@ function mesecon:mvps_get_stack(pos, dir, maximum)
end
if nn.name == "air"
or minetest.registered_nodes[nn.name].liquidtype ~= "none" then --is liquid
or (minetest.registered_nodes[nn.name]
and minetest.registered_nodes[nn.name].liquidtype ~= "none") then --is liquid
break
end
@ -106,8 +107,9 @@ function mesecon:mvps_pull_single(pos, dir) -- pos: pos of mvps; direction: dire
np = mesecon:addPosRule(pos, dir)
nn = minetest.env:get_node(np)
if minetest.registered_nodes[nn.name].liquidtype == "none"
and not mesecon:is_mvps_stopper(nn, {x = -dir.x, y = -dir.y, z = -dir.z}, {{pos = np, node = nn}}, 1) then
if ((not minetest.registered_nodes[nn.name]) --unregistered node
or minetest.registered_nodes[nn.name].liquidtype == "none") --non-liquid node
and not mesecon:is_mvps_stopper(nn, {x = -dir.x, y = -dir.y, z = -dir.z}, {{pos = np, node = nn}}, 1) then --non-stopper node
local meta = minetest.env:get_meta(np):to_table()
minetest.env:remove_node(np)
minetest.env:add_node(pos, nn)
@ -129,8 +131,21 @@ function mesecon:mvps_pull_all(pos, direction) -- pos: pos of mvps; direction: d
local lpos2 = {x=pos.x-direction.x*2, y=pos.y-direction.y*2, z=pos.z-direction.z*2} -- 2 away
local lnode2 = minetest.env:get_node(lpos2)
if lnode.name ~= "ignore" and lnode.name ~= "air" and minetest.registered_nodes[lnode.name].liquidtype == "none" then return end
if lnode2.name == "ignore" or lnode2.name == "air" or not(minetest.registered_nodes[lnode2.name].liquidtype == "none") then return end
--avoid pulling solid nodes
if lnode.name ~= "ignore"
and lnode.name ~= "air"
and ((not minetest.registered_nodes[lnode.name])
or minetest.registered_nodes[lnode.name].liquidtype == "none") then
return
end
--avoid pulling empty or liquid nodes
if lnode2.name == "ignore"
or lnode2.name == "air"
or (minetest.registered_nodes[lnode2.name]
and minetest.registered_nodes[lnode2.name].liquidtype ~= "none") then
return
end
local oldpos = {x=lpos2.x + direction.x, y=lpos2.y + direction.y, z=lpos2.z + direction.z}
repeat
@ -142,7 +157,10 @@ function mesecon:mvps_pull_all(pos, direction) -- pos: pos of mvps; direction: d
lpos2.y = lpos2.y-direction.y
lpos2.z = lpos2.z-direction.z
lnode = minetest.env:get_node(lpos2)
until lnode.name=="air" or lnode.name=="ignore" or not(minetest.registered_nodes[lnode2.name].liquidtype == "none")
until lnode.name == "air"
or lnode.name == "ignore"
or (minetest.registered_nodes[lnode2.name]
and minetest.registered_nodes[lnode2.name].liquidtype ~= "none")
minetest.env:remove_node(oldpos)
end
@ -151,9 +169,9 @@ function mesecon:mvps_move_objects(pos, dir, nodestack)
-- Move object at tip of stack
local pushpos = mesecon:addPosRule(pos, -- get pos at tip of stack
{x = dir.x * (#nodestack),
y = dir.y * (#nodestack),
z = dir.z * (#nodestack)})
{x = dir.x * #nodestack,
y = dir.y * #nodestack,
z = dir.z * #nodestack})
local objects = minetest.env:get_objects_inside_radius(pushpos, 1)
@ -177,8 +195,11 @@ function mesecon:mvps_move_objects(pos, dir, nodestack)
local entity = obj:get_luaentity()
if not entity or not mesecon:is_mvps_unmov(entity.name) then
local np = mesecon:addPosRule(obj:getpos(), dir)
--move only if destination is not solid
local nn = minetest.env:get_node(np)
if not minetest.registered_nodes[nn.name].walkable then
if not ((not minetest.registered_nodes[nn.name])
or minetest.registered_nodes[nn.name].walkable) then
obj:setpos(np)
end
end

5
mesecons_pistons/init.lua
View File

@ -56,12 +56,14 @@ end
local piston_remove_pusher = function(pos, node)
pistonspec = minetest.registered_nodes[node.name].mesecons_piston
if pushername == pistonspec.pusher then --make sure there actually is a pusher (for compatibility reasons mainly)
return
end
dir = piston_get_direction(pistonspec.dir, node)
local pusherpos = mesecon:addPosRule(pos, dir)
local pushername = minetest.env:get_node(pusherpos).name
if pushername == pistonspec.pusher then --make sure there actually is a pusher (for compatibility reasons mainly)
minetest.env:remove_node(pusherpos)
minetest.sound_play("piston_retract", {
pos = pos,
@ -70,7 +72,6 @@ local piston_remove_pusher = function (pos, node)
})
nodeupdate(pusherpos)
end
end
local piston_on = function(pos, node)
local pistonspec = minetest.registered_nodes[node.name].mesecons_piston