OpenEuphoria

Original date:2018-03-31 06:05:04 Edited by: petelomax Subject: Re: Important question?

OK, cffi.e did not handle void* (or TT*) properly(!!!); you will need to grab the latest copy of builtins/cffi.e from the repository.
(At least that demonstrates my point that cffi.e is maintainable, the changes needed were somewhat easier, both for me to make and you to download, than modifying the compiler itself!)

include cffi.e 
-- NOTE: this is a triple_quote, for some reason not displaying right on this forum: 
constant tTT = """  
typedef struct TT {  
   int i;  
// ....  
   void *data;  
   TT *next;  
   } 
""" 

constant integer idTT = define_struct(tTT) 
 
atom pList = NULL 
 
procedure push(integer i) 
    atom pTT = allocate_struct(idTT) 
    set_struct_field(idTT,pTT,"i",i) 
    set_struct_field(idTT,pTT,"data",pList) 
    set_struct_field(idTT,pTT,"next",pList) 
    pList = pTT 
end procedure 
 
function pop() 
    atom pTT = pList 
    pList = get_struct_field(idTT,pTT,"next") 
    sequence res = {get_struct_field(idTT,pTT,"i"), 
                    get_struct_field(idTT,pTT,"data"), 
                    get_struct_field(idTT,pTT,"next")} 
    free(pTT) 
    return res 
end function 
 
for i=1 to 3 do 
    push(i) 
end for 
 
for i=1 to 3 do 
    ?pop() 
end for 

output:

{3,42415824,42415824} 
{2,42094328,42094328} 
{1,0,0} 

Regards,
Pete

PS: the triple quote appears quite different in the preview to when actually posted, as well, so I split the <eucode> in two.