// DoString ...
func (state *LuaState) DoString(script string) (string, error) {
code := C.CString(script)
defer C.free(unsafe.Pointer(code))
C.luaL_loadstring(state.lua, code)
C.lua_pcallk(state.lua, 0, LuaMultRet, 0, 0, nil)
return "", nil
}
// Calls a function in protected mode.
//
// Both nargs and nresults have the same meaning as in Call. If there are
// no errors during the call, Pcall behaves exactly like Call. However,
// if there is any error, Pcall catches it, pushes a single value on the
// stack (the error message), and returns an error code. Like Call, Pcall
// always removes the function and its arguments from the stack.
//
// If errfunc is 0, then the error message returned on the stack is exactly
// the original error message. Otherwise, errfunc is the stack index of
// an error handler function. (In the current implementation, this index
// cannot be a pseudo-index.) In case of runtime errors, this function
// will be called with the error message and its return value will be the
// message returned on the stack by Pcall.
//
// Typically, the error handler function is used to add more debug
// information to the error message, such as a stack traceback. Such
// information cannot be gathered after the return of Pcall, since by then
// the stack has unwound.
func (this *State) Pcall(nargs, nresults, errfunc int) error {
defer func() {
if r := recover(); r != nil {
fmt.Println(r.(string))
}
}()
r := int(C.lua_pcallk(this.luastate, C.int(nargs), C.int(nresults), C.int(errfunc), C.int(0), nil))
return this.geterror(r)
}
func (self *Lua) CallFunction(name string, args ...interface{}) {
defer func() {
if r := recover(); r != nil {
if self.PrintTraceback { //NOCOVER
print("============ start lua traceback ============\n")
self.RunString(`print(debug.traceback())`)
print("============ end lua traceback ==============\n")
}
panic(r)
}
}()
cName := cstr(name)
C.setup_message_handler(self.State)
C.lua_getglobal(self.State, cName)
for _, arg := range args {
self.PushGoValue(reflect.ValueOf(arg))
}
ret := C.lua_pcallk(self.State, C.int(len(args)), 0, C.lua_gettop(self.State)-C.int(len(args)+2), 0, nil)
if ret != C.int(0) {
self.Panic("%s", C.GoString(C.lua_tolstring(self.State, -1, nil)))
}
}
func (self *Lua) RunString(code string) {
defer func() {
if r := recover(); r != nil {
if self.PrintTraceback { //NOCOVER
print("============ start lua traceback ============\n")
self.RunString(`print(debug.traceback())`)
print("============ end lua traceback ==============\n")
}
panic(r)
}
}()
cCode := cstr(code)
C.setup_message_handler(self.State)
if ret := C.luaL_loadstring(self.State, cCode); ret != C.int(0) {
self.Panic("%s", C.GoString(C.lua_tolstring(self.State, -1, nil)))
}
ret := C.lua_pcallk(self.State, 0, 0, C.lua_gettop(self.State)-C.int(1), 0, nil)
if ret != C.int(0) {
self.Panic("%s", C.GoString(C.lua_tolstring(self.State, -1, nil)))
}
C.lua_settop(self.State, 0)
}