local util = {}

function util.search(modpath, exts={"can", "lua"})
	for _, ext in ipairs(exts) do
		for path in package.path:gmatch("[^;]+") do
			local fpath = path:gsub("%.lua", "."..ext):gsub("%?", (modpath:gsub("%.", "/")))
			local f = io.open(fpath)
			if f then
				f:close()
				return fpath
			end
		end
	end
end

function util.load(str, name, env)
	if _VERSION == "Lua 5.1" then
		local fn, err = loadstring(str, name)
		if not fn then return fn, err end
		return env ~= nil and setfenv(fn, env) or fn
	else
		if env then
			return load(str, name, nil, env)
		else
			return load(str, name)
		end
	end
end

function util.merge(...)
	local r = {}
	for _, t in ipairs({...}) do
		for k, v in pairs(t) do
			r[k] = v
		end
	end
	return r
end

return util