mirror of
https://github.com/minetest/minetest.git
synced 2024-11-27 18:13:46 +01:00
5a0ed780f5
Client now informs about incompatible servers from the list, this permits to prevent the protocol movements. Server announces its supported protocol versions to master server
597 lines
15 KiB
Lua
597 lines
15 KiB
Lua
-- Minetest: builtin/misc_helpers.lua
|
|
|
|
--------------------------------------------------------------------------------
|
|
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
|
|
table.insert(t, dump2(k, keyStr, dumped))
|
|
end
|
|
else
|
|
keyStr = basic_dump(k)
|
|
end
|
|
local vname = string.format("%s[%s]", name, keyStr)
|
|
table.insert(t, 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 "<circular reference>"
|
|
end
|
|
nested[o] = true
|
|
indent = indent or "\t"
|
|
level = level or 1
|
|
local t = {}
|
|
local dumped_indexes = {}
|
|
for i, v in ipairs(o) do
|
|
table.insert(t, 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)
|
|
table.insert(t, 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
|
|
|
|
--------------------------------------------------------------------------------
|
|
-- Localize functions to avoid table lookups (better performance).
|
|
local table_insert = table.insert
|
|
local str_sub, str_find = string.sub, string.find
|
|
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 = str_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 = str_sub(str, pos, np - 1)
|
|
if include_empty or (s ~= "") then
|
|
max_splits = max_splits - 1
|
|
table_insert(items, s)
|
|
end
|
|
pos = npe + 1
|
|
until (max_splits == 0) or (pos > (len + 1))
|
|
return items
|
|
end
|
|
|
|
--------------------------------------------------------------------------------
|
|
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
|
|
table.insert(retval,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
|
|
table.insert(retval,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
|
|
table.insert(retval,last_line)
|
|
table.insert(retval,string.sub(text,current_idx))
|
|
else
|
|
last_line = last_line .. " " .. string.sub(text,current_idx)
|
|
table.insert(retval,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 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
|
|
|