-- Minetest: builtin/misc_helpers.lua -------------------------------------------------------------------------------- -- Localize functions to avoid table lookups (better performance). local string_sub, string_find = string.sub, string.find -------------------------------------------------------------------------------- function basic_dump(o) local tp = type(o) if tp == "number" then return tostring(o) elseif tp == "string" then return string.format("%q", o) elseif tp == "boolean" then return tostring(o) elseif tp == "nil" then return "nil" -- Uncomment for full function dumping support. -- Not currently enabled because bytecode isn't very human-readable and -- dump's output is intended for humans. --elseif tp == "function" then -- return string.format("loadstring(%q)", string.dump(o)) else return string.format("<%s>", tp) end end local keywords = { ["and"] = true, ["break"] = true, ["do"] = true, ["else"] = true, ["elseif"] = true, ["end"] = true, ["false"] = true, ["for"] = true, ["function"] = true, ["goto"] = true, -- Lua 5.2 ["if"] = true, ["in"] = true, ["local"] = true, ["nil"] = true, ["not"] = true, ["or"] = true, ["repeat"] = true, ["return"] = true, ["then"] = true, ["true"] = true, ["until"] = true, ["while"] = true, } local function is_valid_identifier(str) if not str:find("^[a-zA-Z_][a-zA-Z0-9_]*$") or keywords[str] then return false end return true end -------------------------------------------------------------------------------- -- Dumps values in a line-per-value format. -- For example, {test = {"Testing..."}} becomes: -- _["test"] = {} -- _["test"][1] = "Testing..." -- This handles tables as keys and circular references properly. -- It also handles multiple references well, writing the table only once. -- The dumped argument is internal-only. function dump2(o, name, dumped) name = name or "_" -- "dumped" is used to keep track of serialized tables to handle -- multiple references and circular tables properly. -- It only contains tables as keys. The value is the name that -- the table has in the dump, eg: -- {x = {"y"}} -> dumped[{"y"}] = '_["x"]' dumped = dumped or {} if type(o) ~= "table" then return string.format("%s = %s\n", name, basic_dump(o)) end if dumped[o] then return string.format("%s = %s\n", name, dumped[o]) end dumped[o] = name -- This contains a list of strings to be concatenated later (because -- Lua is slow at individual concatenation). local t = {} for k, v in pairs(o) do local keyStr if type(k) == "table" then if dumped[k] then keyStr = dumped[k] else -- Key tables don't have a name, so use one of -- the form _G["table: 0xFFFFFFF"] keyStr = string.format("_G[%q]", tostring(k)) -- Dump key table t[#t + 1] = dump2(k, keyStr, dumped) end else keyStr = basic_dump(k) end local vname = string.format("%s[%s]", name, keyStr) t[#t + 1] = dump2(v, vname, dumped) end return string.format("%s = {}\n%s", name, table.concat(t)) end -------------------------------------------------------------------------------- -- This dumps values in a one-statement format. -- For example, {test = {"Testing..."}} becomes: -- [[{ -- test = { -- "Testing..." -- } -- }]] -- This supports tables as keys, but not circular references. -- It performs poorly with multiple references as it writes out the full -- table each time. -- The indent field specifies a indentation string, it defaults to a tab. -- Use the empty string to disable indentation. -- The dumped and level arguments are internal-only. function dump(o, indent, nested, level) if type(o) ~= "table" then return basic_dump(o) end -- Contains table -> true/nil of currently nested tables nested = nested or {} if nested[o] then return "" end nested[o] = true indent = indent or "\t" level = level or 1 local t = {} local dumped_indexes = {} for i, v in ipairs(o) do t[#t + 1] = dump(v, indent, nested, level + 1) dumped_indexes[i] = true end for k, v in pairs(o) do if not dumped_indexes[k] then if type(k) ~= "string" or not is_valid_identifier(k) then k = "["..dump(k, indent, nested, level + 1).."]" end v = dump(v, indent, nested, level + 1) t[#t + 1] = k.." = "..v end end nested[o] = nil if indent ~= "" then local indent_str = "\n"..string.rep(indent, level) local end_indent_str = "\n"..string.rep(indent, level - 1) return string.format("{%s%s%s}", indent_str, table.concat(t, ","..indent_str), end_indent_str) end return "{"..table.concat(t, ", ").."}" end -------------------------------------------------------------------------------- function string.split(str, delim, include_empty, max_splits, sep_is_pattern) delim = delim or "," max_splits = max_splits or -1 local items = {} local pos, len, seplen = 1, #str, #delim local plain = not sep_is_pattern max_splits = max_splits + 1 repeat local np, npe = string_find(str, delim, pos, plain) np, npe = (np or (len+1)), (npe or (len+1)) if (not np) or (max_splits == 1) then np = len + 1 npe = np end local s = string_sub(str, pos, np - 1) if include_empty or (s ~= "") then max_splits = max_splits - 1 items[#items + 1] = s end pos = npe + 1 until (max_splits == 0) or (pos > (len + 1)) return items end -------------------------------------------------------------------------------- function table.indexof(list, val) for i, v in ipairs(list) do if v == val then return i end end return -1 end assert(table.indexof({"foo", "bar"}, "foo") == 1) assert(table.indexof({"foo", "bar"}, "baz") == -1) -------------------------------------------------------------------------------- function file_exists(filename) local f = io.open(filename, "r") if f == nil then return false else f:close() return true end end -------------------------------------------------------------------------------- function string:trim() return (self:gsub("^%s*(.-)%s*$", "%1")) end assert(string.trim("\n \t\tfoo bar\t ") == "foo bar") -------------------------------------------------------------------------------- function math.hypot(x, y) local t x = math.abs(x) y = math.abs(y) t = math.min(x, y) x = math.max(x, y) if x == 0 then return 0 end t = t / x return x * math.sqrt(1 + t * t) end -------------------------------------------------------------------------------- function math.sign(x, tolerance) tolerance = tolerance or 0 if x > tolerance then return 1 elseif x < -tolerance then return -1 end return 0 end -------------------------------------------------------------------------------- function get_last_folder(text,count) local parts = text:split(DIR_DELIM) if count == nil then return parts[#parts] end local retval = "" for i=1,count,1 do retval = retval .. parts[#parts - (count-i)] .. DIR_DELIM end return retval end -------------------------------------------------------------------------------- function cleanup_path(temppath) local parts = temppath:split("-") temppath = "" for i=1,#parts,1 do if temppath ~= "" then temppath = temppath .. "_" end temppath = temppath .. parts[i] end parts = temppath:split(".") temppath = "" for i=1,#parts,1 do if temppath ~= "" then temppath = temppath .. "_" end temppath = temppath .. parts[i] end parts = temppath:split("'") temppath = "" for i=1,#parts,1 do if temppath ~= "" then temppath = temppath .. "" end temppath = temppath .. parts[i] end parts = temppath:split(" ") temppath = "" for i=1,#parts,1 do if temppath ~= "" then temppath = temppath end temppath = temppath .. parts[i] end return temppath end function core.formspec_escape(text) if text ~= nil then text = string.gsub(text,"\\","\\\\") text = string.gsub(text,"%]","\\]") text = string.gsub(text,"%[","\\[") text = string.gsub(text,";","\\;") text = string.gsub(text,",","\\,") end return text end function core.splittext(text,charlimit) local retval = {} local current_idx = 1 local start,stop = string_find(text, " ", current_idx) local nl_start,nl_stop = string_find(text, "\n", current_idx) local gotnewline = false if nl_start ~= nil and (start == nil or nl_start < start) then start = nl_start stop = nl_stop gotnewline = true end local last_line = "" while start ~= nil do if string.len(last_line) + (stop-start) > charlimit then retval[#retval + 1] = last_line last_line = "" end if last_line ~= "" then last_line = last_line .. " " end last_line = last_line .. string_sub(text, current_idx, stop - 1) if gotnewline then retval[#retval + 1] = last_line last_line = "" gotnewline = false end current_idx = stop+1 start,stop = string_find(text, " ", current_idx) nl_start,nl_stop = string_find(text, "\n", current_idx) if nl_start ~= nil and (start == nil or nl_start < start) then start = nl_start stop = nl_stop gotnewline = true end end --add last part of text if string.len(last_line) + (string.len(text) - current_idx) > charlimit then retval[#retval + 1] = last_line retval[#retval + 1] = string_sub(text, current_idx) else last_line = last_line .. " " .. string_sub(text, current_idx) retval[#retval + 1] = last_line end return retval end -------------------------------------------------------------------------------- if INIT == "game" then local dirs1 = {9, 18, 7, 12} local dirs2 = {20, 23, 22, 21} function core.rotate_and_place(itemstack, placer, pointed_thing, infinitestacks, orient_flags) orient_flags = orient_flags or {} local unode = core.get_node_or_nil(pointed_thing.under) if not unode then return end local undef = core.registered_nodes[unode.name] if undef and undef.on_rightclick then undef.on_rightclick(pointed_thing.under, unode, placer, itemstack, pointed_thing) return end local pitch = placer:get_look_pitch() local fdir = core.dir_to_facedir(placer:get_look_dir()) local wield_name = itemstack:get_name() local above = pointed_thing.above local under = pointed_thing.under local iswall = (above.y == under.y) local isceiling = not iswall and (above.y < under.y) local anode = core.get_node_or_nil(above) if not anode then return end local pos = pointed_thing.above local node = anode if undef and undef.buildable_to then pos = pointed_thing.under node = unode iswall = false end if core.is_protected(pos, placer:get_player_name()) then core.record_protection_violation(pos, placer:get_player_name()) return end local ndef = core.registered_nodes[node.name] if not ndef or not ndef.buildable_to then return end if orient_flags.force_floor then iswall = false isceiling = false elseif orient_flags.force_ceiling then iswall = false isceiling = true elseif orient_flags.force_wall then iswall = true isceiling = false elseif orient_flags.invert_wall then iswall = not iswall end if iswall then core.set_node(pos, {name = wield_name, param2 = dirs1[fdir + 1]}) elseif isceiling then if orient_flags.force_facedir then core.set_node(pos, {name = wield_name, param2 = 20}) else core.set_node(pos, {name = wield_name, param2 = dirs2[fdir + 1]}) end else -- place right side up if orient_flags.force_facedir then core.set_node(pos, {name = wield_name, param2 = 0}) else core.set_node(pos, {name = wield_name, param2 = fdir}) end end if not infinitestacks then itemstack:take_item() return itemstack end end -------------------------------------------------------------------------------- --Wrapper for rotate_and_place() to check for sneak and assume Creative mode --implies infinite stacks when performing a 6d rotation. -------------------------------------------------------------------------------- core.rotate_node = function(itemstack, placer, pointed_thing) core.rotate_and_place(itemstack, placer, pointed_thing, core.setting_getbool("creative_mode"), {invert_wall = placer:get_player_control().sneak}) return itemstack end end -------------------------------------------------------------------------------- function core.explode_table_event(evt) if evt ~= nil then local parts = evt:split(":") if #parts == 3 then local t = parts[1]:trim() local r = tonumber(parts[2]:trim()) local c = tonumber(parts[3]:trim()) if type(r) == "number" and type(c) == "number" and t ~= "INV" then return {type=t, row=r, column=c} end end end return {type="INV", row=0, column=0} end -------------------------------------------------------------------------------- function core.explode_textlist_event(evt) if evt ~= nil then local parts = evt:split(":") if #parts == 2 then local t = parts[1]:trim() local r = tonumber(parts[2]:trim()) if type(r) == "number" and t ~= "INV" then return {type=t, index=r} end end end return {type="INV", index=0} end -------------------------------------------------------------------------------- function core.explode_scrollbar_event(evt) local retval = core.explode_textlist_event(evt) retval.value = retval.index retval.index = nil return retval end -------------------------------------------------------------------------------- function core.pos_to_string(pos, decimal_places) local x = pos.x local y = pos.y local z = pos.z if decimal_places ~= nil then x = string.format("%." .. decimal_places .. "f", x) y = string.format("%." .. decimal_places .. "f", y) z = string.format("%." .. decimal_places .. "f", z) end return "(" .. x .. "," .. y .. "," .. z .. ")" end -------------------------------------------------------------------------------- function core.string_to_pos(value) if value == nil then return nil end local p = {} p.x, p.y, p.z = string.match(value, "^([%d.-]+)[, ] *([%d.-]+)[, ] *([%d.-]+)$") if p.x and p.y and p.z then p.x = tonumber(p.x) p.y = tonumber(p.y) p.z = tonumber(p.z) return p end local p = {} p.x, p.y, p.z = string.match(value, "^%( *([%d.-]+)[, ] *([%d.-]+)[, ] *([%d.-]+) *%)$") if p.x and p.y and p.z then p.x = tonumber(p.x) p.y = tonumber(p.y) p.z = tonumber(p.z) return p end return nil end assert(core.string_to_pos("10.0, 5, -2").x == 10) assert(core.string_to_pos("( 10.0, 5, -2)").z == -2) assert(core.string_to_pos("asd, 5, -2)") == nil) -------------------------------------------------------------------------------- function core.string_to_area(value) local p1, p2 = unpack(value:split(") (")) if p1 == nil or p2 == nil then return nil end p1 = core.string_to_pos(p1 .. ")") p2 = core.string_to_pos("(" .. p2) if p1 == nil or p2 == nil then return nil end return p1, p2 end local function test_string_to_area() local p1, p2 = core.string_to_area("(10.0, 5, -2) ( 30.2, 4, -12.53)") assert(p1.x == 10.0 and p1.y == 5 and p1.z == -2) assert(p2.x == 30.2 and p2.y == 4 and p2.z == -12.53) p1, p2 = core.string_to_area("(10.0, 5, -2 30.2, 4, -12.53") assert(p1 == nil and p2 == nil) p1, p2 = core.string_to_area("(10.0, 5,) -2 fgdf2, 4, -12.53") assert(p1 == nil and p2 == nil) end test_string_to_area() -------------------------------------------------------------------------------- function table.copy(t, seen) local n = {} seen = seen or {} seen[t] = n for k, v in pairs(t) do n[(type(k) == "table" and (seen[k] or table.copy(k, seen))) or k] = (type(v) == "table" and (seen[v] or table.copy(v, seen))) or v end return n end -------------------------------------------------------------------------------- -- mainmenu only functions -------------------------------------------------------------------------------- if INIT == "mainmenu" then function core.get_game(index) local games = game.get_games() if index > 0 and index <= #games then return games[index] end return nil end function fgettext_ne(text, ...) text = core.gettext(text) local arg = {n=select('#', ...), ...} if arg.n >= 1 then -- Insert positional parameters ($1, $2, ...) local result = '' local pos = 1 while pos <= text:len() do local newpos = text:find('[$]', pos) if newpos == nil then result = result .. text:sub(pos) pos = text:len() + 1 else local paramindex = tonumber(text:sub(newpos+1, newpos+1)) result = result .. text:sub(pos, newpos-1) .. tostring(arg[paramindex]) pos = newpos + 2 end end text = result end return text end function fgettext(text, ...) return core.formspec_escape(fgettext_ne(text, ...)) end end