Re: Passing binary data to dll

[Coda Highland <chighland@...>]

On Tue, Aug 14, 2012 at 3:29 PM, Digital <forumme5487@live.com> wrote:
> From within lua
>
> //------------------------------
> somevar = require "modulename";
> data = "binary data";
> somevar.testfunc(data);
> //-------------------------------
>
> It works for anything normal like string "abc123" but as soon as I add
> binary data it stops functioning.

Why are you using string functions in C? strlen is going to break on
embedded nulls, for example. If you're storing, say, numbers as 32-bit
big-endian values, you're going to hit an embedded null very early on
and your C code will fail.

Your Lua code is probably fine. Just use the Lua C API to find the
length of the binary data (Lua uses length-tagged strings, not
null-terminated) and deal with it that way.

/s/ Adam