Re: Lua 5.1, alien and C struct with string

[Philipp Janda <siffiejoe@...>]

Am 15.04.2015 um 18:40 schröbte Markus Korber:
> Hi,

Hi!

> [...]
>
> testit = alien.defstruct {
>    { "a",     "int"     },
>    { "d",     "string" }}
>
> [...]
>
> #define STRING_LENGTH 256
> typedef char TString[STRING_LENGTH];
>
> typedef struct TUSB
> {
>     int a;
>     TString d;
> } TUSB;

The type "string" in alien is for char pointers (`char*`, 4 byte on 
32-bit machines) not for character arrays. I don't think that alien has 
a type specifier for accessing arrays (it is a rare requirement, because 
arrays are converted to pointers automatically in most situations).


Philipp