// look up a Lua value by its full name. If idx is 0, then this name
// is assumed to start in the global table, e.g. "string.gsub".
// With non-zero idx, can be used to look up subfields of a table
func Lookup(L *lua.State, path string, idx int) {
parts := strings.Split(path, ".")
if idx != 0 {
L.PushValue(idx)
} else {
L.GetGlobal("_G")
}
for _, field := range parts {
L.GetField(-1, field)
L.Remove(-2) // remove table
}
}
func register(L *lua.State, table string, values Map, convertFun bool) {
pop := true
if table == "*" {
pop = false
} else if len(table) > 0 {
L.GetGlobal(table)
if L.IsNil(-1) {
L.NewTable()
L.SetGlobal(table)
L.GetGlobal(table)
}
} else {
L.GetGlobal("_G")
}
for name, val := range values {
t := reflect.TypeOf(val)
if t.Kind() == reflect.Func {
if convertFun {
L.PushGoFunction(GoLuaFunc(L, val))
} else {
lf := val.(func(*lua.State) int)
L.PushGoFunction(lf)
}
} else {
GoToLua(L, t, valueOf(val))
}
L.SetField(-2, name)
}
if pop {
L.Pop(1)
}
}
// Add a callback to the lua state.
func addCallback(L *lua.State, name string, args []interface{}) {
L.GetGlobal("callbacks")
luar.GoToLua(L, reflect.TypeOf(args), reflect.ValueOf(args))
L.SetField(-2, name)
}