math library is missing in the latest update of Logitech G-Hub - lua

Question

local delay = math.random(25, 50)
[string "LuaVM"]:5: attempt to index a nil value (global 'math')
I can't use math.random anymore is there any way to fix this ?

Answer 1

If math library is missed you can insert the following code block at the beginning of your script.
It will not fix the whole math library, but only some of the most frequently used functions (including math.random).
It will also fix the following errors:
bad argument #1 to 'Sleep' (number has no integer representation)
attempt to call a nil value (field 'getn')
do
local state_8, state_45, cached_bits, cached_bits_qty = 2, 0, 0, 0
local prev_width, prev_bits_in_factor, prev_k = 0
for c in GetDate():gmatch"." do
state_45 = state_45 % 65537 * 23456 + c:byte()
end
local function get_53_random_bits()
local value53 = 0
for shift = 26, 27 do
local p = 2^shift
state_45 = (state_45 * 233 + 7161722017421) % 35184372088832
repeat state_8 = state_8 * 76 % 257 until state_8 ~= 1
local r = state_8 % 32
local n = state_45 / 2^(13 - (state_8 - r) / 32)
n = (n - n%1) % 2^32 / 2^r
value53 = value53 * p + ((n%1 * 2^32) + (n - n%1)) % p
end
return value53
end
for j = 1, 10 do get_53_random_bits() end
local function get_random_bits(number_of_bits)
local pwr_number_of_bits = 2^number_of_bits
local result
if number_of_bits <= cached_bits_qty then
result = cached_bits % pwr_number_of_bits
cached_bits = (cached_bits - result) / pwr_number_of_bits
else
local new_bits = get_53_random_bits()
result = new_bits % pwr_number_of_bits
cached_bits = (new_bits - result) / pwr_number_of_bits * 2^cached_bits_qty + cached_bits
cached_bits_qty = 53 + cached_bits_qty
end
cached_bits_qty = cached_bits_qty - number_of_bits
return result
end
table = table or {}
table.getn = table.getn or function(x) return #x end
math = math or {}
math.huge = math.huge or 1/0
math.abs = math.abs or function(x) return x < 0 and -x or x end
math.floor = math.floor or function(x) return x - x%1 end
math.ceil = math.ceil or function(x) return x + (-x)%1 end
math.min = math.min or function(x, y) return x < y and x or y end
math.max = math.max or function(x, y) return x > y and x or y end
math.sqrt = math.sqrt or function(x) return x^0.5 end
math.pow = math.pow or function(x, y) return x^y end
math.frexp = math.frexp or
function(x)
local e = 0
if x == 0 then
return x, e
end
local sign = x < 0 and -1 or 1
x = x * sign
while x >= 1 do
x = x / 2
e = e + 1
end
while x < 0.5 do
x = x * 2
e = e - 1
end
return x * sign, e
end
math.exp = math.exp or
function(x)
local e, t, k, p = 0, 1, 1
repeat e, t, k, p = e + t, t * x / k, k + 1, e
until e == p
return e
end
math.log = math.log or
function(x)
assert(x > 0)
local a, b, c, d, e, f = x < 1 and x or 1/x, 0, 0, 1, 1
repeat
repeat
c, d, e, f = c + d, b * d / e, e + 1, c
until c == f
b, c, d, e, f = b + 1 - a * c, 0, 1, 1, b
until b <= f
return a == x and -f or f
end
math.log10 = math.log10 or
function(x)
return math.log(x) / 2.3025850929940459
end
math.random = math.random or
function(m, n)
if m then
if not n then
m, n = 1, m
end
local k = n - m + 1
if k < 1 or k > 2^53 then
error("Invalid arguments for function 'random()'", 2)
end
local width, bits_in_factor, modk
if k == prev_k then
width, bits_in_factor = prev_width, prev_bits_in_factor
else
local pwr_prev_width = 2^prev_width
if k > pwr_prev_width / 2 and k <= pwr_prev_width then
width = prev_width
else
width = 53
local width_low = -1
repeat
local w = (width_low + width) / 2
w = w - w%1
if k <= 2^w then
width = w
else
width_low = w
end
until width - width_low == 1
prev_width = width
end
bits_in_factor = 0
local bits_in_factor_high = width + 1
while bits_in_factor_high - bits_in_factor > 1 do
local bits_in_new_factor = (bits_in_factor + bits_in_factor_high) / 2
bits_in_new_factor = bits_in_new_factor - bits_in_new_factor%1
if k % 2^bits_in_new_factor == 0 then
bits_in_factor = bits_in_new_factor
else
bits_in_factor_high = bits_in_new_factor
end
end
prev_k, prev_bits_in_factor = k, bits_in_factor
end
local factor, saved_bits, saved_bits_qty, pwr_saved_bits_qty = 2^bits_in_factor, 0, 0, 2^0
k = k / factor
width = width - bits_in_factor
local pwr_width = 2^width
local gap = pwr_width - k
repeat
modk = get_random_bits(width - saved_bits_qty) * pwr_saved_bits_qty + saved_bits
local modk_in_range = modk < k
if not modk_in_range then
local interval = gap
saved_bits = modk - k
saved_bits_qty = width - 1
pwr_saved_bits_qty = pwr_width / 2
repeat
saved_bits_qty = saved_bits_qty - 1
pwr_saved_bits_qty = pwr_saved_bits_qty / 2
if pwr_saved_bits_qty <= interval then
if saved_bits < pwr_saved_bits_qty then
interval = nil
else
interval = interval - pwr_saved_bits_qty
saved_bits = saved_bits - pwr_saved_bits_qty
end
end
until not interval
end
until modk_in_range
return m + modk * factor + get_random_bits(bits_in_factor)
else
return get_53_random_bits() / 2^53
end
end
local orig_Sleep = Sleep
function Sleep(x)
return orig_Sleep(x - x%1)
end
end