STATIC ffi_type *get_ffi_type(mp_obj_t o_in)
{
if (MP_OBJ_IS_STR(o_in)) {
mp_uint_t len;
const char *s = mp_obj_str_get_data(o_in, &len);
ffi_type *t = char2ffi_type(*s);
if (t != NULL) {
return t;
}
}
// TODO: Support actual libffi type objects
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError, "Unknown type"));
}
static SQInteger sq_lib_bind_func(HSQUIRRELVM v)
{
void **modbuf;
void *mod;
void *sym;
const SQChar *symname;
const char *rettype;
sq_getuserdata(v, 1, (void**)&modbuf, NULL);
mod = *modbuf;
sq_getstring(v, 2, &rettype);
sq_getstring(v, 3, &symname);
sym = GET_SYM(mod, symname);
if (!sym)
return sq_throwerror(v, "Cannot find symbol");
int nparam = sq_getsize(v, 4);
int size = sizeof(FFIFunc) + sizeof(ffi_type*) * nparam;
FFIFunc *ffibuf = (FFIFunc*)sq_newuserdata(v, size);
sq_push_delegate_table(v, FFI_LIB_FUNC_TAG);
sq_setdelegate(v, -2);
// printf("Allocated %d bytes at %p\n", size, ffibuf);
ffibuf->func = sym;
ffibuf->rettype = *rettype;
int i;
for (i = 0; i < nparam; i++) {
sq_pushinteger(v, i);
sq_get(v, 4);
ffibuf->params[i] = get_ffi_type(v, -1);
if (!ffibuf->params[i])
return SQ_ERROR;
sq_poptop(v);
}
int res = ffi_prep_cif(&ffibuf->cif, FFI_DEFAULT_ABI, nparam, char2ffi_type(*rettype), ffibuf->params);
if (res != FFI_OK)
return sq_throwerror(v, "Error in ffi_prep_cif");
return 1;
}
static ffi_type *get_ffi_type(HSQUIRRELVM v, int idx)
{
int type = sq_gettype(v, idx);
void *p;
const SQChar *s;
ffi_type *t;
switch (type) {
case OT_USERPOINTER:
sq_getuserpointer(v, idx, &p);
return (ffi_type*)p;
case OT_STRING:
sq_getstring(v, idx, &s);
t = char2ffi_type(*s);
if (t)
return t;
default:
sq_throwerror(v, "Type spec must be string or ffi_type");
return NULL;
}
}
