255 lines
6.6 KiB
Lua
255 lines
6.6 KiB
Lua
--[[
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TechAge
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=======
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Copyright (C) 2017-2020 Joachim Stolberg
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AGPL v3
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See LICENSE.txt for more information
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Lua Logic Block
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]]--
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-- for lazy programmers
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local M = minetest.get_meta
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local S = techage.S
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local logic = techage.logic
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-- mem.inp_tbl = {
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-- n001 = true, -- "on" received
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-- n002 = false, -- "off" received
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-- inp = true, -- last input
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-- outp = false, -- last output
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-- }
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local ValidSymbols = {
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["if"] = true,
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["then"] = true,
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["else"] = true,
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["end"] = true,
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["return"] = true,
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["not"] = true,
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["and"] = true,
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["or"] = true,
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["inp"] = true,
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["outp"] = true,
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["true"] = true,
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["false"] = true,
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["nil"] = true,
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["=="] = true,
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["~="] = true,
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["("] = true,
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[")"] = true,
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}
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local function check(expression)
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for _, sym in ipairs(string.split(expression, " ")) do
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if not ValidSymbols[sym] and string.find(sym, '^[n0-9]+$') == nil then
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return false, "Error: Invalid symbol '"..sym.."'"
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end
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end
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return true, "ok"
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end
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local function compile(nvm, expression)
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local res, err = check(expression)
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if res then
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local code, err = loadstring(expression, "")
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if code then
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nvm.code = code
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nvm.error = "ok"
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else
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nvm.code = nil
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nvm.error = err
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end
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else
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nvm.code = nil
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nvm.error = err
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end
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end
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local function get_code(pos, nvm)
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local meta = M(pos)
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local if_expr = meta:get_string("if_expr") or ""
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local then_expr = meta:get_string("then_expr") or ""
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local else_expr = meta:get_string("else_expr") or ""
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local expr = "if "..if_expr.." then return "..then_expr.." else return "..else_expr.." end"
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compile(nvm, expr)
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return nvm.code
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end
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local function eval(pos, nvm)
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nvm.code = nvm.code or get_code(pos, nvm)
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if nvm.code then
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setfenv(nvm.code, nvm.inp_tbl)
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local res, sts = pcall(nvm.code)
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if res then
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nvm.error = "ok"
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if sts == true and nvm.inp_tbl.outp ~= true then
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nvm.inp_tbl.outp = sts
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return "on"
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elseif sts == false and nvm.inp_tbl.outp ~= false then
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nvm.inp_tbl.outp = sts
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return "off"
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end
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else
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nvm.error = "Error: "..sts
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end
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end
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end
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local function data(nvm)
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local tbl = {"inp = "..dump(nvm.inp_tbl.inp), "outp = "..dump(nvm.inp_tbl.outp)}
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for k,v in pairs(nvm.inp_tbl) do
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if k ~= "inp" and k ~= "outp" then
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tbl[#tbl+1] = k.." = "..dump(v)
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end
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end
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return table.concat(tbl, ", ")
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end
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local function formspec(pos, meta)
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local nvm = techage.get_nvm(pos)
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local numbers = meta:get_string("numbers") or ""
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local if_expr = meta:get_string("if_expr") or ""
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local then_expr = meta:get_string("then_expr") or ""
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local else_expr = meta:get_string("else_expr") or ""
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local err = nvm.error or "ok"
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if err ~= "ok" then
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err = string.sub(err, 15)
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end
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err = minetest.formspec_escape(err)
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nvm.inp_tbl = nvm.inp_tbl or {inp = false, outp = false}
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local data = data(nvm)
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return "size[9,8]"..
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"background[0,0;9,1.3;techage_formspec_bg.png]"..
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"field[0.5,0.2;8.5,2;numbers;"..S("Insert destination node number(s)")..";"..numbers.."]" ..
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"label[0,1.4;Variables: "..data.."]"..
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"label[0,2;Valid symbols: not and or true false nil == ~= ( )]"..
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"background[0,2.6;9,4;techage_formspec_bg.png]"..
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"label[0.1,2.8;if]"..
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"field[0.8,2.9;7,1;if_expr;;"..if_expr.."]" ..
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"label[7.6,2.8;then]"..
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"label[0.6,3.8;return]"..
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"field[2,3.9;7,1;then_expr;;"..then_expr.."]" ..
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"label[0.1,4.5;else]"..
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"label[0.6,5.2;return]"..
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"field[2,5.3;7,1;else_expr;;"..else_expr.."]" ..
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"label[0.1,6;end]"..
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"label[0,6.8;Result: "..err.."]"..
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"button[2,7.3;2.5,1;update;"..S("Update").."]"..
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"button[5,7.3;2.5,1;store;"..S("Store").."]"
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end
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minetest.register_node("techage:ta3_logic", {
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description = S("TA3 Logic Block"),
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tiles = {
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-- up, down, right, left, back, front
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"techage_filling_ta3.png^techage_frame_ta3_top.png",
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"techage_filling_ta3.png^techage_frame_ta3_top.png",
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"techage_filling_ta3.png^techage_frame_ta3.png^techage_appl_logic.png",
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},
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after_place_node = function(pos, placer)
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local meta = M(pos)
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local nvm = techage.get_nvm(pos)
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nvm.inp_tbl = {inp = false, outp = false}
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logic.after_place_node(pos, placer, "techage:ta3_logic", S("TA3 Logic Block"))
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logic.infotext(meta, S("TA3 Logic Block"))
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meta:set_string("formspec", formspec(pos, meta))
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end,
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on_receive_fields = function(pos, formname, fields, player)
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if minetest.is_protected(pos, player:get_player_name()) then
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return
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end
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local meta = M(pos)
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local nvm = techage.get_nvm(pos)
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if fields.numbers and fields.numbers ~= "" then
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if techage.check_numbers(fields.numbers, player:get_player_name()) then
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meta:set_string("numbers", fields.numbers)
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logic.infotext(M(pos), S("TA3 Logic Block"))
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end
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end
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if fields.if_expr and fields.if_expr ~= "" then
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meta:set_string("if_expr", fields.if_expr)
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end
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if fields.then_expr and fields.then_expr ~= "" then
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meta:set_string("then_expr", fields.then_expr)
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end
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if fields.else_expr and fields.else_expr ~= "" then
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meta:set_string("else_expr", fields.else_expr)
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end
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if fields.store then
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get_code(pos, nvm)
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end
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meta:set_string("formspec", formspec(pos, meta))
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end,
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on_timer = function(pos,elapsed)
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local nvm = techage.get_nvm(pos)
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local topic = eval(pos, nvm)
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if topic then
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local meta = M(pos)
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local own_num = meta:get_string("node_number") or ""
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local numbers = meta:get_string("numbers") or ""
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techage.send_multi(own_num, numbers, topic)
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end
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return false
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end,
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techage_set_numbers = function(pos, numbers, player_name)
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local meta = M(pos)
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local res = logic.set_numbers(pos, numbers, player_name, S("TA3 Logic Block"))
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meta:set_string("formspec", formspec(pos, meta))
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return res
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end,
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after_dig_node = function(pos, oldnode, oldmetadata)
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techage.remove_node(pos, oldnode, oldmetadata)
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techage.del_mem(pos)
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end,
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paramtype2 = "facedir",
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groups = {choppy=2, cracky=2, crumbly=2},
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is_ground_content = false,
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drop = "techage:ta3_logic2",
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sounds = default.node_sound_wood_defaults(),
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})
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-- Deprecated and replaced by "techage:ta3_logic2"
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--minetest.register_craft({
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-- output = "techage:ta3_logic",
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-- recipe = {
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-- {"", "group:wood", ""},
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-- {"", "default:copper_ingot", "techage:vacuum_tube"},
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-- {"", "group:wood", ""},
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-- },
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--})
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techage.register_node({"techage:ta3_logic"}, {
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on_recv_message = function(pos, src, topic, payload)
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local nvm = techage.get_nvm(pos)
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nvm.inp_tbl = nvm.inp_tbl or {outp = false}
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if topic == "on" then
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nvm.inp_tbl.inp = true
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nvm.inp_tbl["n"..src] = true
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elseif topic == "off" then
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nvm.inp_tbl.inp = false
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nvm.inp_tbl["n"..src] = false
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else
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return "unsupported"
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end
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minetest.get_node_timer(pos):start(0.1)
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end,
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on_node_load = function(pos)
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end,
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})
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