What is the best way to define the Imported C function

[qunying <zhu.qunying@gmail.com>]

Hi,

I am learning Ada and try to test the interface with C.

for this function, what is the best way to define the function in Ada?

int xcb_parse_display(const char *name, char **host, int *display, int
*screen);

function parse_display (Name : String; Host: ??; Display :
Integer_Ptr; Screen : Integer_Ptr) return Integer;
pragma Import (C, parse_display, "xcb_parse_display");

Where Integer_Ptr is access Integer;
How to define the type for char **?  Sould I use "type char_ptr_ptr is
access char_ptr;" where char_ptr is defined in Interfaces.C; or there
is a better way to do it?

Thanks