OpenEuphoria

Re: sdl2 and ffi

• Posted by ghaberek (admin) Dec 05, 2022
• 1309 views

C:\EuProgramming\Euphoria4_1\libffi-euphoria\include\std\ffi.e:910 in function c_func()  
attempt to subscript an atom 
(reading from it) - in assignment to 'fn'  
    rid = 1 
 

The problem is that define_c_func() returned -1 for something and c_func() doesn't have good error handling. The first value of m_funcs is an atom because nothing is supposed to exist there. You can add a quick check in c_func() to help find the problem:

override function c_func( integer rid, sequence args ) 
 
    if rid > 0 then 
        return eu:c_func( rid, args ) 
    end if 
 
    -- add this: 
    if rid = -1 then 
        machine_proc( M_CRASH, "Invalid C function id: %d", {rid} ) 
    end if 
 
    rid = rid * -1 
 
    atom fn       = m_funcs[rid][1] 
    atom cif      = m_funcs[rid][2] 
    sequence name = m_funcs[rid][3] 
 

-Greg