 -- Define your decimal values
local TID = 57440 -- Example value for TID, write your own
local SID = 57419 -- Example value for SID, write your own

-- Don't modify code!!!!
-- Function to constrain a value to 16-bit range and validate
local function validate16Bit(value, name)
    if value < 0 or value > 0xFFFF then
        error(name .. " value out of range: " .. value .. ". Must be between 0 and 65535.")
    end
    return value
end

-- Validate and apply 16-bit constraint to TID and SID
TID = validate16Bit(TID, "TID")
SID = validate16Bit(SID, "SID")

-- Function to convert a number to a hexadecimal string with 8 characters
local function intToHex32(value)
    return string.format("%08X", value % 0x100000000)
end

-- Function to perform a 16-bit left shift on a hexadecimal value
local function leftShift16Bits(hexString)
    local value = tonumber(hexString, 16)
    return intToHex32(value * 2^16 % 0x100000000)
end

-- Function to perform multiplication and addition on a hexadecimal value
local function processHexValue(hexString, multiplier, addend)
    local value = tonumber(hexString, 16)
    return intToHex32((value * multiplier + addend) % 0x100000000)
end

-- Function to extract the 16-bit high halfword from a hexadecimal string
local function extractHighHalfword(hexString)
    local value = tonumber(hexString, 16)
    return string.format("%04X", math.floor(value / 0x10000) % 0x10000)
end

-- Get high and low bytes for TID and SID
local TIDHigh, TIDLow = math.floor(TID / 256), TID % 256
local SIDHigh, SIDLow = math.floor(SID / 256), SID % 256

-- Sum TIDHigh, TIDLow, SIDHigh, and SIDLow
local totalSum = TIDHigh + TIDLow + SIDHigh + SIDLow

-- Convert totalSum to hexadecimal
local hexTotalSum = intToHex32(totalSum)

-- Convert totalSum to signed 32-bit integer and perform operations
local hexResultShifted = leftShift16Bits(hexTotalSum)
local hexResultFinal = processHexValue(hexResultShifted, 0xEEB9EB65, 0xA3561A1)

-- Extract and print the 16-bit high halfword
print("Your xxxx value is: " .. extractHighHalfword(hexResultFinal))

created 9 months ago

Lua online compiler

Write, Run & Share Lua code online using OneCompiler's Lua online compiler for free. It's one of the robust, feature-rich online compilers for Lua language, running the latest Lua version 5.4. Getting started with the OneCompiler's Lua editor is easy and fast. The editor shows sample boilerplate code when you choose language as Lua and start coding.

Taking inputs (stdin)

OneCompiler's Lua online editor supports stdin and users can give inputs to programs using the STDIN textbox under the I/O tab. Following is a sample Lua program which takes name as input and prints hello message with your name.

name = io.read("*a")
print ("Hello ", name)

About Lua

Lua is a light weight embeddable scripting language which is built on top of C. It is used in almost all kind of applications like games, web applications, mobile applications, image processing etc. It's a very powerful, fast, easy to learn, open-source scripting language.

Syntax help

Variables

By default all the variables declared are global variables
If the variables are explicitly mentioned as local then they are local variables.
Lua is a dynamically typed language and hence only the values will have types not the variables.

Examples

-- global variables
a = 10

-- local variables

local x = 30

Value Type	Description
number	Represents numbers
string	Represents text
nil	Differentiates values whether it has data or not
boolean	Value can be either true or false
function	Represents a sub-routine
userdata	Represents arbitary C data
thread	Represents independent threads of execution.
table	Can hold any value except nil

Loops

1. While:

While is also used to iterate a set of statements based on a condition. Usually while is preferred when number of iterations are not known in advance.

while(condition)
do
--code
end

2. Repeat-Until:

Repeat-Until is also used to iterate a set of statements based on a condition. It is very similar to Do-While, it is mostly used when you need to execute the statements atleast once.

repeat
   --code
until( condition )

3. For:

For loop is used to iterate a set of statements based on a condition.

for init,max/min value, increment
do
   --code
end

Functions

Function is a sub-routine which contains set of statements. Usually functions are written when multiple calls are required to same set of statements which increase re-usuability and modularity.

optional_function_scope function function_name( argument1, argument2, argument3........, argumentn)
--code
return params with comma seperated
end