Adjust implementation of table functions

[4z0t]

• table.getsize used to return 0 when given non table value. Make asm implementation do the same as well. related to Always return a number from table.getn and table.getsize #97;
• implement table.getsize in C++;
• implement table.empty in C++.
• don't use asm to register new functions

[Garanas]

I've done a few AI vs AI games and they appear to run fine. I'll do a few manual tests next.

[4z0t]

Made it compatible with Python patcher

[Garanas]

Do we still need these 2 alternatives?

[4z0t]

I can remove them.

[4z0t]

The problem is Lua resets them in current dev branch:

--- table.empty(t) returns true iff t has no keys/values.
---@param t table
---@return boolean
function table.empty(t)
    if type(t) ~= 'table' then return true end
    return next(t) == nil
end

--- Returns actual size of a table, including string keys
---@param t table
---@return number
function table.getsize(t)
    if type(t) ~= 'table' then return 0 end
    local size = 0
    for k, v in t do
        size = size + 1
    end
    return size
end

-- replace with assembly implementations
table.empty = table.empty2 or table.empty
table.getsize = table.getsize2 or table.getsize

[Garanas]

Then we remove that logic. As long as the assembly versions are functionally equivalent then that should be no issue.

[Garanas]

See also: FAForever/fa#6537

[4z0t]

Done

[4z0t]

If we want to have deepcopy here is how it was done in my dev branch https://github.com/4z0t/FA-Binary-Patches/blob/develop/section/Lua/LuaObject.cxx#L87-L121