Exemplo n.º 1
0
func ExampleMap() {
	const code = `
print(#M)
print(M.one)
print(M.two)
print(M.three)
`

	L := luar.Init()
	defer L.Close()

	M := luar.Map{
		"one":   "ein",
		"two":   "zwei",
		"three": "drei",
	}

	luar.Register(L, "", luar.Map{
		"M":     M,
		"print": fmt.Println,
	})

	err := L.DoString(code)
	if err != nil {
		fmt.Println("error", err.Error())
	}
	// Output:
	// 3
	// ein
	// zwei
	// drei
}
Exemplo n.º 2
0
func main() {
	L := luar.Init()
	defer L.Close()

	// arbitrary Go functions can be registered
	// to be callable from Lua
	luar.Register(L, "", luar.Map{
		"GoFun": GoFun,
	})

	res := L.DoString(code)
	if !res {
		fmt.Println("Error:", L.ToString(-1))
		os.Exit(1)
	}

	res = L.DoString(setup)
	if !res {
		fmt.Println("Error:", L.ToString(-1))
		os.Exit(1)
	} else {
		// there will be a table on the stack!
		fmt.Println("table?", L.IsTable(-1))
		v := luar.CopyTableToMap(L, nil, -1)
		fmt.Println("returned map", v)
		m := v.(map[string]interface{})
		for k, v := range m {
			fmt.Println(k, v)
		}
	}
}
Exemplo n.º 3
0
func main() {
	L := luar.Init()
	defer L.Close()

	M := luar.Map{
		"one":   "ein",
		"two":   "zwei",
		"three": "drei",
	}

	S := []string{"alfred", "alice", "bob", "frodo"}

	ST := &MyStruct{"Dolly", 46}

	luar.Register(L, "", luar.Map{
		"M":  M,
		"S":  S,
		"ST": ST,
	})

	err := L.DoString(code)
	if err != nil {
		fmt.Println("error", err.Error())
	}

}
Exemplo n.º 4
0
func main() {
	lua := `
    fn = function(obj)
      slice = obj.GetSlice()
      print(type(slice), #slice)
      obj = slice[1]  -- slice[2] will raise a 'index out of range' error
      -- obj.Naam = 'howzit'  -- will raise a 'no field' error
      name = obj.GetName() 
      return name
    end
  `
	L := luar.Init()
	defer L.Close()

	L.DoString(lua)

	luafn := luar.NewLuaObjectFromName(L, "fn")
	gobj := NewStructWithSlice("string")
	res, err := luafn.Call(gobj)
	if err != nil {
		fmt.Println("error!", err)
	} else {
		fmt.Println("result", res)
	}
}
Exemplo n.º 5
0
func Example_pointers() {
	const test = `
-- Pointers to structs and structs within pointers are automatically dereferenced.
local t = newRef()
Print(t.Index, t.Number, t.Title)
`

	type Ref struct {
		Index  int
		Number *int
		Title  *string
	}

	newRef := func() *Ref {
		n := new(int)
		*n = 10
		t := new(string)
		*t = "foo"
		return &Ref{Index: 17, Number: n, Title: t}
	}

	L := luar.Init()
	defer L.Close()

	luar.Register(L, "", luar.Map{
		"Print":  fmt.Println,
		"newRef": newRef,
	})

	L.DoString(test)
	// Output:
	// 17 10 foo
}
Exemplo n.º 6
0
func main() {
	L := luar.Init()
	defer L.Close()

	L.GetGlobal("print")
	print := luar.NewLuaObject(L, -1)
	print.Call("one two", 12)

	L.GetGlobal("package")
	pack := luar.NewLuaObject(L, -1)
	fmt.Println(pack.Get("path"))

	/*
	   L.GetGlobal("string")
	   strtab := luar.NewLuaObject(L,-1)
	   iter := strtab.Iter()
	   for iter.Next() {
	       fmt.Println(iter.Key,iter.Value)
	   }
	*/

	gsub := luar.NewLuaObjectFromName(L, "string.gsub")
	res, err := gsub.Call("hello $NAME go $HOME", "%$(%u+)", luar.Map{
		"NAME": "Dolly",
		"HOME": "where you belong",
	})
	if res == nil {
		fmt.Println("error", err)
	} else {
		fmt.Println("result", res)
	}

}
Exemplo n.º 7
0
func (PM *PluginManager) initLua() {
	PM.L = luar.Init()
	luar.RawRegister(PM.L, "", luar.Map{
		"RegisterCommand": func(L *lua.State) int {
			name := L.ToString(1)
			fn := luar.NewLuaObject(L, 2)
			PM.Commands[name] = Plugin{name, fn}
			log.Printf("    %-10s command\n", name)
			return 0
		},
		"RegisterEvent": func(L *lua.State) int {
			name := L.ToString(1)
			event := L.ToString(2)
			fn := luar.NewLuaObject(L, 3)
			if _, ok := PM.Events[event]; !ok {
				PM.Events[event] = make(map[string]Plugin)
			}
			PM.Events[event][name] = Plugin{name, fn}
			log.Printf("    %-10s event\n", name)
			return 0
		},
	})

	luar.Register(PM.L, "go", luar.Map{
		"Split":  strings.Split,
		"SplitN": strings.SplitN,
		"PrintTable": func(table interface{}) {
			log.Printf("%#v\n", table)
		},
	})
}
Exemplo n.º 8
0
// Read configuration in Lua format.
//
// WARNING: Deprecated.
func ExampleCopyTableToMap() {
	L := luar.Init()
	defer L.Close()

	err := L.DoString(config)
	if err != nil {
		log.Fatal(err)
	}

	// There should be a table on the Lua stack.
	if !L.IsTable(-1) {
		log.Fatal("no table on stack")
	}

	v := luar.CopyTableToMap(L, nil, -1)
	// Extract table from the returned interface.
	m := v.(map[string]interface{})
	marked := m["marked"].([]interface{})
	options := m["options"].(map[string]interface{})

	fmt.Printf("%#v\n", m["baggins"])
	fmt.Printf("%#v\n", m["name"])
	fmt.Printf("%#v\n", len(marked))
	fmt.Printf("%.1f\n", marked[0])
	fmt.Printf("%.1f\n", marked[1])
	fmt.Printf("%#v\n", options["leave"])
	// Output:
	// true
	// "dumbo"
	// 2
	// 1.0
	// 2.0
	// true
}
Exemplo n.º 9
0
func ExampleLuaTableIter_Next() {
	const code = `
return {
  foo = 17,
  bar = 18,
}
`

	L := luar.Init()
	defer L.Close()

	err := L.DoString(code)
	if err != nil {
		log.Fatal(err)
	}

	lo := luar.NewLuaObject(L, -1)

	iter := lo.Iter()
	keys := []string{}
	values := map[string]float64{}
	for iter.Next() {
		k := iter.Key.(string)
		keys = append(keys, k)
		values[k] = iter.Value.(float64)
	}
	sort.Strings(keys)

	for _, v := range keys {
		fmt.Println(v, values[v])
	}
	// Output:
	// bar 18
	// foo 17
}
Exemplo n.º 10
0
func main() {
	L := luar.Init()
	defer L.Close()

	L.GetGlobal("print")
	print := luar.NewLuaObject(L, -1)
	print.Call("one two", 12)

	L.GetGlobal("package")
	pack := luar.NewLuaObject(L, -1)
	fmt.Println(pack.Get("path"))

	lcopy := luar.NewLuaObjectFromValue

	gsub := luar.NewLuaObjectFromName(L, "string.gsub")

	rmap := lcopy(L, luar.Map{
		"NAME": "Dolly",
		"HOME": "where you belong",
	})

	res, err := gsub.Call("hello $NAME go $HOME", "%$(%u+)", rmap)
	if res == nil {
		fmt.Println("error", err)
	} else {
		fmt.Println("result", res)
	}

}
Exemplo n.º 11
0
// TODO: better error handling
func LuaInit() *lua.State {
	L := luar.Init()
	//L.AtPanic(LuaAtPanic)

	L.OpenLibs()
	L.DoString("math.randomseed( os.time() )")

	return L
}
Exemplo n.º 12
0
func NewConf() *Conf {
	c := Conf{
		l: luar.Init(),
	}

	c.registerCommands()

	return &c
}
Exemplo n.º 13
0
func ExampleMakeChan() {
	L1 := luar.Init()
	defer L1.Close()
	L2 := luar.Init()
	defer L2.Close()

	luar.MakeChan(L1)
	L1.SetGlobal("c")
	L1.GetGlobal("c")
	c := luar.LuaToGo(L1, nil, -1)

	luar.Register(L2, "", luar.Map{
		"c":     c,
		"Print": fmt.Println,
	})

	const code1 = `
c.send(17)
`

	const code2 = `
v = c.recv()
Print(v)
`

	var wg sync.WaitGroup
	wg.Add(1)
	go func() {
		err := L1.DoString(code1)
		if err != nil {
			fmt.Println(err)
		}
		wg.Done()
	}()

	err := L2.DoString(code2)
	if err != nil {
		fmt.Println(err)
	}
	wg.Wait()
	// Output:
	// 17
}
Exemplo n.º 14
0
// mkstate constructs a new lua state with the appropriate functions binded
// for use in scripts.
// it also binds functions used for actions, which should probably go somewhere else.
func mkstate() *lua.State {
	L := luar.Init()

	luar.Register(L, "", luar.Map{
		"connect": lconnect,
		"http":    lhttp,
	})

	return L
}
Exemplo n.º 15
0
func (r Runtime) InitPlugin(name, source string, implements func(string)) error {
	context := luar.Init()
	luar.Register(context, "", luar.Map{
		"implements": func(interfaceName string) {
			implements(interfaceName)
		},
	})
	context.DoString(source)
	r.plugins[name] = context
	return nil
}
Exemplo n.º 16
0
func main() {
	L := luar.Init()
	defer L.Close()

	luar.Register(L, "", luar.Map{
		"Print": fmt.Println,
		"MSG":   "hello", // can also register constants
	})

	L.DoString(test)

}
Exemplo n.º 17
0
func main() {
	whj := "wang::hai::jun"
	fmt.Println(strings.Split(whj, "::"))
	TestCall("111")
	L := luar.Init()
	defer L.Close()
	M := luar.Map{
		"one":   "ein",
		"two":   "zwei",
		"three": "drei",
	}

	S := []string{"alfred", "alice", "bob", "frodo"}

	ST := &MyStruct{"Dolly", 46}

	luar.Register(L, "", luar.Map{
		"Print":    fmt.Println,
		"testcall": TestCall,
		"print":    fmt.Println,
		"MSG":      "hello", // can also register constants
		"M":        M,
		"S":        S,
		"ST":       ST,
	})

	//L.DoString(test)
	L.DoString(code)
	L.GetGlobal("print")
	print := luar.NewLuaObject(L, -1)
	print.Call("one two", 12)

	L.GetGlobal("package")
	pack := luar.NewLuaObject(L, -1)
	fmt.Println(pack.Get("path"))

	lcopy := luar.NewLuaObjectFromValue

	gsub := luar.NewLuaObjectFromName(L, "string.gsub")

	rmap := lcopy(L, luar.Map{
		"NAME": "Dolly",
		"HOME": "where you belong",
	})

	res, err := gsub.Call("hello $NAME go $HOME", "%$(%u+)", rmap)
	if res == nil {
		fmt.Println("error", err)
	} else {
		fmt.Println("\033[0;31mresult\033[0m", res)
	}

}
Exemplo n.º 18
0
func (luaipt *LuaIpt) Init(path string) error {
	luaipt.state = luar.Init()
	luaipt.Bind("Debugf", log.Debugf)
	luaipt.Bind("Debug", log.Debug)
	luaipt.Bind("Messagef", log.Messagef)
	luaipt.Bind("Message", log.Message)
	luaipt.Bind("Warningf", log.Warningf)
	luaipt.Bind("Warning", log.Warning)
	luaipt.Bind("Errorf", log.Errorf)
	luaipt.Bind("Error", log.Error)
	luaipt.path = path
	return nil
}
Exemplo n.º 19
0
func main() {
	L := luar.Init()
	defer L.Close()

	luar.Register(L, "", luar.Map{
		"newT": newT,
	})

	res := L.DoString(setup)
	if res != nil {
		fmt.Println("Error:", res)
	}

}
Exemplo n.º 20
0
Arquivo: struct.go Projeto: kdar/luar
func main() {
	L := luar.Init()
	defer L.Close()

	// arbitrary Go functions can be registered
	// to be callable from Lua
	luar.Register(L, "", luar.Map{
		"config": config,
	})

	res := L.DoString(setup)
	if res != nil {
		fmt.Println("Error:", res)
	}

}
Exemplo n.º 21
0
func init() {
	piepan.Register("lua", &piepan.Plugin{
		Name: "Lua (C)",
		New: func(in *piepan.Instance) piepan.Environment {
			s := luar.Init()
			p := &Plugin{
				instance:  in,
				state:     s,
				listeners: make(map[string][]*luar.LuaObject),
			}

			luar.Register(s, "piepan", luar.Map{
				"On":         p.apiOn,
				"Disconnect": p.apiDisconnect,
			})
			s.GetGlobal("piepan")
			s.NewTable()
			luar.Register(s, "*", luar.Map{
				"Play":       p.apiAudioPlay,
				"IsPlaying":  p.apiAudioIsPlaying,
				"Stop":       p.apiAudioStop,
				"NewTarget":  p.apiAudioNewTarget,
				"SetTarget":  p.apiAudioSetTarget,
				"Bitrate":    p.apiAudioBitrate,
				"SetBitrate": p.apiAudioSetBitrate,
				"Volume":     p.apiAudioVolume,
				"SetVolume":  p.apiAudioSetVolume,
			})
			s.SetField(-2, "Audio")
			s.NewTable()
			luar.Register(s, "*", luar.Map{
				"New": p.apiTimerNew,
			})
			s.SetField(-2, "Timer")
			s.NewTable()
			luar.Register(s, "*", luar.Map{
				"New": p.apiProcessNew,
			})
			s.SetField(-2, "Process")
			s.SetTop(0)

			return p
		},
	})
}
Exemplo n.º 22
0
// WARNING: Deprecated.
func ExampleCopyTableToStruct() {
	L := luar.Init()
	defer L.Close()

	err := L.DoString(config)
	if err != nil {
		log.Fatal(err)
	}

	// There should be a table on the Lua stack.
	if !L.IsTable(-1) {
		log.Fatal("no table on stack")
	}

	type conf struct {
		Baggins bool   `lua:"baggins"`
		Age     int    `lua:"age"`
		Name    string `lua:"name"`
		Marked  []int  `lua:"marked"`
		Options struct {
			Leave  bool            `lua:"leave"`
			cancel string          // Ingored since it is unexported.
			Tags   map[string]bool `lua:"tags"`
		} `lua:"options"`
	}

	var s conf
	v := luar.CopyTableToStruct(L, reflect.TypeOf(s), -1)
	s = v.(conf)

	fmt.Println(s.Baggins)
	fmt.Println(s.Age)
	fmt.Println(s.Name)
	fmt.Println(s.Marked)
	fmt.Println(s.Options.Leave)
	fmt.Println(s.Options.Tags["foolish"], s.Options.Tags["strong"])
	// Output:
	// true
	// 24
	// dumbo
	// [1 2]
	// true
	// true true
}
Exemplo n.º 23
0
func ExampleRegister_sandbox() {
	const code = `
    Print("foo")
    Print(io ~= nil)
    Print(os == nil)
`

	L := luar.Init()
	defer L.Close()

	res := L.LoadString(code)
	if res != 0 {
		msg := L.ToString(-1)
		fmt.Println("could not compile", msg)
	}

	// Create a empty sandbox.
	L.NewTable()
	// "*" means "use table on top of the stack."
	luar.Register(L, "*", luar.Map{
		"Print": fmt.Println,
	})
	env := luar.NewLuaObject(L, -1)
	G := luar.Global(L)

	// We can copy any Lua object from "G" to env with 'Set', e.g.:
	//   env.Set("print", G.Get("print"))
	// A more convenient and efficient way is to do a bulk copy with 'Setv':
	env.Setv(G, "print", "io")

	// Set up sandbox.
	L.SetfEnv(-2)

	// Run 'code' chunk.
	err := L.Call(0, 0)
	if err != nil {
		fmt.Println("could not run", err)
	}
	// Output:
	// foo
	// true
	// true
}
Exemplo n.º 24
0
// This example shows how Go slices and maps are marshalled to Lua tables and
// vice versa. This requires the Lua state to be initialized with `luar.Init()`.
//
// An arbitrary Go function is callable from Lua, and list-like tables become
// slices on the Go side. The Go function returns a map, which is wrapped as a
// proxy object. You can however then copy this to a Lua table explicitly. There
// is also `luar.unproxify` on the Lua side.
func ExampleInit() {
	const code = `
-- Lua tables auto-convert to slices.
local res = foo {10,20,30,40}

-- The result is a map-proxy.
print(res['1'], res['2'])

-- Which we may explicitly convert to a table.
res = luar.unproxify(res)
for k,v in pairs(res) do
	print(k,v)
end
`

	foo := func(args []int) (res map[string]int) {
		res = make(map[string]int)
		for i, val := range args {
			res[strconv.Itoa(i)] = val * val
		}
		return
	}

	L := luar.Init()
	defer L.Close()

	luar.Register(L, "", luar.Map{
		"foo":   foo,
		"print": fmt.Println,
	})

	res := L.DoString(code)
	if res != nil {
		fmt.Println("Error:", res)
	}
	// Output:
	// 400 900
	// 1 400
	// 0 100
	// 3 1600
	// 2 900
}
Exemplo n.º 25
0
func ExampleNewLuaObjectFromValue() {
	L := luar.Init()
	defer L.Close()

	gsub := luar.NewLuaObjectFromName(L, "string.gsub")

	// We do have to explicitly copy the map to a Lua table, because `gsub`
	// will not handle userdata types.
	gmap := luar.NewLuaObjectFromValue(L, luar.Map{
		"NAME": "Dolly",
		"HOME": "where you belong",
	})
	res, err := gsub.Call("hello $NAME go $HOME", "%$(%u+)", gmap)
	if err != nil {
		log.Fatal(err)
	}

	fmt.Println(res)
	// Output:
	// hello Dolly go where you belong
}
Exemplo n.º 26
0
Arquivo: script.go Projeto: imvu/Tetra
// LoadScript finds and loads the appropriate script by a given short name (tetra/die).
func LoadScript(name string) (script *Script, err error) {
	kind := strings.Split(name, "/")[0]
	client, ok := Services[kind]
	if !ok {
		return nil, errors.New("Cannot find target service " + kind)
	}

	if _, present := Scripts[name]; present {
		return nil, errors.New("Double script load!")
	}

	script = &Script{
		Name:     name,
		L:        luar.Init(),
		Log:      log.New(os.Stdout, name+" ", log.LstdFlags),
		Handlers: make(map[string]*Handler),
		Commands: make(map[string]*Command),
		Service:  kind,
		Client:   client,
		Uuid:     uuid.New(),
		Trigger:  make(chan []interface{}, 5),
	}

	script.seed()

	script, err = loadLuaScript(script)
	if err != nil {
		return nil, errors.New("No such script " + name)
	}

	Scripts[name] = script

	Etcd.CreateDir("/tetra/scripts/"+name, 0)

	RunHook("SCRIPTLOAD", script)

	go script.trigger()

	return
}
Exemplo n.º 27
0
func main() {

	luaCode := `
for i = 1,10 do
  MyFunc(MSG,i)
end
  `

	L := luar.Init()
	defer L.Close()

	luar.Register(L, "", luar.Map{
		//"MyFunc":  fmt.Println,
		"MyFunc": MyFunc,
		"MSG":    "Hello, Luar!",
	})

	err := L.DoString(luaCode)
	if err != nil {
		panic(err)
	}
}
Exemplo n.º 28
0
func main() {
	L := luar.Init()
	defer L.Close()

	gettop := func() {
		fmt.Println("top", L.GetTop())
	}
	gettop()

	// compile chunk
	res := L.LoadString(test)
	if res != 0 {
		msg := L.ToString(-1)
		fmt.Println("could not compile", msg)
	}

	// create environment for chunk
	L.NewTable()
	// "*" means use table on stack....
	luar.Register(L, "*", luar.Map{
		"Print": fmt.Println,
	})
	env := luar.NewLuaObject(L, -1)
	G := luar.Global(L)
	//~ env.Set("print",G.Get("print"))
	//~ env.Set("io",G.Get("io"))
	// more convenient/efficient way to do a bulk copy
	env.Setv(G, "print", "io")
	L.SetfEnv(-2)

	// run chunk
	err := L.Call(0, 0)
	if err != nil {
		fmt.Println("could not run", err)
	}

}
Exemplo n.º 29
0
Arquivo: script.go Projeto: imvu/Tetra
// LoadScript finds and loads the appropriate script by a given short name (tetra/die).
func NewScript(name string) (script *Script, err error) {
	kind := strings.Split(name, "/")[0]

	script = &Script{
		Name:    name,
		L:       luar.Init(),
		Log:     log.New(os.Stdout, name+" ", log.LstdFlags),
		Service: kind,
		Uuid:    uuid.New(),
	}

	script.seed()

	script, err = loadLuaScript(script)
	if err != nil {
		script, err = loadMoonScript(script)

		if err != nil {
			return nil, errors.New("No such script " + name)
		}
	}

	return
}
Exemplo n.º 30
0
// Slices must be looped with 'ipairs'.
func Example_slices() {
	const test = `
for i, v in ipairs(names) do
	 Print(i, v)
end
`

	L := luar.Init()
	defer L.Close()

	names := []string{"alfred", "alice", "bob", "frodo"}

	luar.Register(L, "", luar.Map{
		"Print": fmt.Println,
		"names": names,
	})

	L.DoString(test)
	// Output:
	// 1 alfred
	// 2 alice
	// 3 bob
	// 4 frodo
}