-JSValueRef CYCallFunction(CYPool &pool, JSContextRef context, size_t setups, void *setup[], size_t count, const JSValueRef arguments[], bool initialize, sig::Signature *signature, ffi_cif *cif, void (*function)()) {
- if (setups + count != signature->count - 1)
- throw CYJSError(context, "incorrect number of arguments to ffi function");
+JSValueRef CYCallFunction(CYPool &pool, JSContextRef context, size_t setups, void *setup[], size_t count, const JSValueRef arguments[], bool initialize, bool variadic, const sig::Signature &signature, ffi_cif *cif, void (*function)()) {
+ size_t have(setups + count);
+ size_t need(signature.count - 1);
+
+ if (have < need)
+ throw CYJSError(context, "insufficient number of arguments to ffi function");
+
+ ffi_cif corrected;
+ sig::Element *elements(signature.elements);
+
+ if (have > need) {
+ if (!variadic)
+ throw CYJSError(context, "exorbitant number of arguments to ffi function");
+
+ elements = new (pool) sig::Element[have + 1];
+ memcpy(elements, signature.elements, sizeof(sig::Element) * (need + 1));
+
+ for (size_t index(need); index != have; ++index) {
+ sig::Element &element(elements[index + 1]);
+ element.name = NULL;
+ element.offset = _not(size_t);
+ element.type = CYGetType(pool, context, arguments[index - setups]);
+ }
+
+ sig::Signature extended;
+ extended.elements = elements;
+ extended.count = have + 1;
+ sig::sig_ffi_cif(pool, signature.count, extended, &corrected);
+ cif = &corrected;
+ }