-- Copyright (C) 2018 CurlyMo & Niek
 
-- This Source Code Form is subject to the terms of the Mozilla Public
-- License, v. 2.0. If a copy of the MPL was not distributed with this
-- file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
 
local M = {}
 
local function round(num, numDecimalPlaces)
  local mult = 10^(numDecimalPlaces or 0)
  return math.floor(num * mult + 0.5) / mult
end
 
function M.run(a, b, c)
 
	if a == nil or b == nil or c ~= nil then
		error("ROUND requires two arguments");
	end
 
	if tonumber(a) == nil then
		error(string.format("ROUND argument #1 expected number, \"%s\" given", type(a)));
	end
 
	if tonumber(b) == nil then
		error(string.format("ROUND argument #2 expected number, \"%s\" given", type(b)));
	end	
 
	local n = tonumber(b);
	if n < 0 or n ~= math.floor(n) then
		error(string.format("ROUND argument #2 expected positive integer number, \"%s\" given", b));
	end	
 
	return round(a, b);
end
 
 
 
function M.info()
	return {
		name = "ROUND",
		version = "1.0",
		reqversion = "8.1.1",
		reqcommit = "0"
	}
end
 
return M;