GetPlayerInfo

local ffi = require "ffi"

--[[ https://github.com/perilouswithadollarsign/cstrike15_src/blob/master/public/cdll_int.h#L159 ]]
local PlayerInfo_t = ffi.typeof([[
    struct {
        uint64_t version;
        uint64_t __xuid;
        char __name[128];
        int userid;
        char __guid[33];
        unsigned int friendsID;
        char __friendsName[128];
        bool __fakeplayer;
        bool __ishltv;
        unsigned int __custom_files[4];
        unsigned char files_downloaded;
    }
]])
local PlayerInfo_t_mt = {}

local native_GetPlayerInfo = vtable_bind("engine.dll", "VEngineClient014", 8, "bool(__thiscall*)(void*, int, $*)", PlayerInfo_t)

local fallback = {
    xuid = function(self) return string.match(tostring(self.__xuid), "%d+") end,
    name = function(self) return ffi_.string(self.__name, 128) end,
    guid = function(self) return ffi.string(self.__guid, 33) end,
    friends_name = function(self) return ffi.string(self.__friendsName, 128) end,
    is_fake_client = function(self) return self.__fakeplayer end,
    is_hltv = function(self) return self.__ishltv end,

    custom_files = function(self)
        local custom_files = self.__custom_files
        return { custom_files[0], custom_files[1], custom_files[2], custom_files[4] }
    end
}

function PlayerInfo_t_mt:__index(index)
    local fallback_fn = fallback[index]
    if not fallback_fn then return nil end

    return fallback[index](self)
end

ffi.metatype(PlayerInfo_t, PlayerInfo_t_mt)

function get_player_info(entindex)
    if type(entindex) ~= "number" then return nil end

    local out = PlayerInfo_t(0xFFFFFFFFFFFFF002ULL)

    if native_GetPlayerInfo(entindex, out) == true then return out end
    return nil
end