// Encodes a Go object into Msgpack and adds it to the function arguments.
func (e *ExecutionEngine) encodeArgument(value interface{}) error {
// Encode Go object into msgpack.
buffer := new(bytes.Buffer)
encoder := msgpack.NewEncoder(buffer)
err := encoder.Encode(value)
if err != nil {
return err
}
// Push the msgpack data onto the Lua stack.
data := buffer.String()
cdata := C.CString(data)
defer C.free(unsafe.Pointer(cdata))
C.lua_pushlstring(e.state, cdata, (C.size_t)(len(data)))
// Convert the argument from msgpack into Lua.
rc := C.mp_unpack(e.state)
if rc != 1 {
return errors.New("skyd.ExecutionEngine: Unable to msgpack encode Lua argument")
}
C.lua_remove(e.state, -2)
return nil
}
// lua_pushstring
func (L *State) PushString(str string) {
Cstr := C.CString(str)
defer C.free(unsafe.Pointer(Cstr))
C.lua_pushlstring(L.s, Cstr, C.size_t(len(str)))
}
func (L *State) PushBytes(b []byte) {
C.lua_pushlstring(L.s, (*C.char)(unsafe.Pointer(&b[0])), C.size_t(len(b)))
}
func pushBytesToLua(L *C.lua_State, bytes []byte) {
h := (*reflect.SliceHeader)(unsafe.Pointer(&bytes))
data := unsafe.Pointer(h.Data)
size := h.Len
C.lua_pushlstring(L, (*C.char)(data), C.size_t(size))
}
func pushStringToLua(L *C.lua_State, str string) {
s, n := stringToC(str)
C.lua_pushlstring(L, s, n)
}