Re: A question about table's length

[Javier Guerra <javier@...>]

Mike Pall wrote:
> I haven't given much thought to the API yet, but it might look
> something like this:
> 
>   ffi.def[[
>     struct foo {
>       uint16_t bar, baz;
>       int i;
>       double d;
>     };
>     struct foo *foo_in(void);
>     void foo_out(struct foo *);
>   ]]
>   local lib = ffi.bindlib("myfoolib")
> 
>   local a = lib.foo_in()
>   local b = ffi.new("struct foo")
>   b.i = a.i + 10
>   b.bar = bit.bxor(a.bar, a.baz)
>   b.baz = 0x1234
>   b.d = a.d - 1.5
>   lib.foo_out(b)
> 
>   -- Nice side-effect: efficient, mutable buffers for Lua.
>   local buf = ffi.new("uint8_t[?]", n)
>   for i=0,n-1 do
>     buf[i] = i
>   end
>   io.write(buf) -- Extended to understand binary data.


Wow!!!   wanna!

-- 
Javier