--------------------------------------
-- 425 by plop
--------------------------------------
-- convert lua 4 code into lua 5.
-- not the best way but it instandly converts simple scripts.
-- add "require("425/425.lua")" above all the other code
--------------------------------------
-- 425 by plop
--------------------------------------
-- convert lua 4 code into lua 5.
-- not the best way but it instandly converts simple scripts.
-- add "require("425/425.lua")" above all the other code
-- in the lua 4 script.
--------------------------------------

-- string stuff
strfind = string.find
strsub = string.sub
gsub = string.gsub
strchar = string.char
strbyte = string.byte
strlen = string.len
strlower = string.lower
strrep = string.rep
strupper = string.upper
format = string.format

-- table stuff
tinsert = table.insert
tremove = table.remove
concat = table.concat
foreach = table.foreach
foreachi = table.foreachi
getn = table.getn
sort = table.sort
setn = table.setn

-- math stuff
abs = math.abs
acos = math.acos
asin = math.asin
atan = math.atan
atan2 = math.atan2
ceil = math.ceil
cos = math.cos
deg = math.deg
exp = math.exp
floor = math.floor
log = math.log
log10 = math.log10
max = math.max
min = math.min
mod = math.mod
pow = math.pow
rad = math.rad
sin = math.sin
sqrt = math.sqrt
tan = math.tan
frexp = math.frexp
ldexp = math.ldexp
random = math.random
randomseed = math.randomseed
pi = math.pi

-- os stuff
date = os.date
execute = os.execute
clock = os.clock
remove = os.remove

-- file stuff
readfrom = function(arg)
	if arg then
		return io.open
	else
		return io.close
	end
end

openfile = readfrom

read = function()
	return io.lines
end
write = io.write
--seek = file:seek
writeto = function(arg)
	if arg then
		return io.output
	else
		return io.close
	end
end

flush = io.flush
call = function(func, arg)
	if type(func) == "function" then
		return func(unpack(arg)) -- primitive call
	else
		local h = metatable(func).__call
		if h then
			return h(func, unpack(arg))
		else
			error("...")
		end
	end
end
appendto = function(file)
	return io.open(file, "a+")
end