Golang State.PushNumber方法代碼示例

func pushMap(L *lua.State, m map[string]interface{}, lower bool) {
	L.CreateTable(0, len(m))
	for k, v := range m {
		if lower {
			L.PushString(strings.ToLower(k))
		} else {
			L.PushString(k)
		}
		switch t := v.(type) {
		case string:
			L.PushString(t)
		case int64:
			L.PushInteger(t)
		case int:
			L.PushInteger(int64(t))
		case float64:
			L.PushNumber(t)
		case bool:
			L.PushBoolean(t)
		case map[string]interface{}:
			pushMap(L, t, false)
		default:
			L.PushNil()
		}
		L.SetTable(-3)
	}
}

// ComplexImag defines 'luar.imag' when 'Init' is called.
// It is the equivalent of Go's 'imag' function.
//
// WARNING: Deprecated, use the 'imag' index instead.
func ComplexImag(L *lua.State) int {
	v := mustUnwrapProxy(L, 1)
	val := reflect.ValueOf(v)
	if unsizedKind(val) != reflect.Complex128 {
		RaiseError(L, "not a complex")
	}
	L.PushNumber(imag(val.Complex()))
	return 1
}

// GoLuaFunc converts an arbitrary Go function into a Lua-compatible GoFunction.
// There are special optimized cases for functions that go from strings to strings,
// and doubles to doubles, but otherwise Go
// reflection is used to provide a generic wrapper function
func GoLuaFunc(L *lua.State, fun interface{}) lua.LuaGoFunction {
	switch f := fun.(type) {
	case func(*lua.State) int:
		return f
	case func(string) string:
		return func(L *lua.State) int {
			L.PushString(f(L.ToString(1)))
			return 1
		}
	case func(float64) float64:
		return func(L *lua.State) int {
			L.PushNumber(f(L.ToNumber(1)))
			return 1
		}
	default:
	}
	var funv reflect.Value
	switch ff := fun.(type) {
	case reflect.Value:
		funv = ff
	default:
		funv = valueOf(fun)
	}
	funt := funv.Type()
	targs, tout := functionArgRetTypes(funt)
	return func(L *lua.State) int {
		var lastT reflect.Type
		orig_targs := targs
		isVariadic := funt.IsVariadic()
		if isVariadic {
			n := len(targs)
			lastT = targs[n-1].Elem()
			targs = targs[0 : n-1]
		}
		args := make([]reflect.Value, len(targs))
		for i, t := range targs {
			val := LuaToGo(L, t, i+1)
			args[i] = valueOfNil(val)
			//println(i,args[i].String())
		}
		if isVariadic {
			n := L.GetTop()
			for i := len(targs) + 1; i <= n; i++ {
				ival := LuaToGo(L, lastT, i)
				args = append(args, valueOfNil(ival))
			}
			targs = orig_targs
		}
		resv := callGo(L, funv, args)
		for i, val := range resv {
			GoToLua(L, tout[i], val, false)
		}
		return len(resv)
	}
}

// Push a Go value 'val' of type 't' on the Lua stack.
// If we haven't been given a concrete type, use the type of the value
// and unbox any interfaces.  You can force slices and maps to be copied
// over as tables by setting 'dontproxify' to true.
func GoToLua(L *lua.State, t reflect.Type, val reflect.Value, dontproxify bool) {
	if !val.IsValid() {
		L.PushNil()
		return
	}
	if t == nil {
		t = val.Type()
	}
	if t.Kind() == reflect.Interface && !val.IsNil() { // unbox interfaces!
		val = valueOf(val.Interface())
		t = val.Type()
	}
	if t.Kind() == reflect.Ptr {
		t = t.Elem()
	}
	kind := t.Kind()

	// underlying type is 'primitive' ? wrap it as a proxy!
	if isPrimitiveDerived(t, kind) != nil {
		makeValueProxy(L, val, cINTERFACE_META)
		return
	}

	switch kind {
	case reflect.Float64, reflect.Float32:
		{
			L.PushNumber(val.Float())
		}
	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
		{
			L.PushNumber(float64(val.Int()))
		}
	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
		{
			L.PushNumber(float64(val.Uint()))
		}
	case reflect.String:
		{
			L.PushString(val.String())
		}
	case reflect.Bool:
		{
			L.PushBoolean(val.Bool())
		}
	case reflect.Slice:
		{
			if !dontproxify {
				makeValueProxy(L, val, cSLICE_META)
			} else {
				CopySliceToTable(L, val)
			}
		}
	case reflect.Map:
		{
			if !dontproxify {
				makeValueProxy(L, val, cMAP_META)
			} else {
				CopyMapToTable(L, val)
			}
		}
	case reflect.Struct:
		{
			if v, ok := val.Interface().(error); ok {
				L.PushString(v.Error())
			} else if v, ok := val.Interface().(*LuaObject); ok {
				v.Push()
			} else {
				if (val.Kind() == reflect.Ptr || val.Kind() == reflect.Interface) && !val.Elem().IsValid() {
					L.PushNil()
					return
				}
				makeValueProxy(L, val, cSTRUCT_META)
			}
		}
	default:
		{
			if v, ok := val.Interface().(error); ok {
				L.PushString(v.Error())
			} else if val.IsNil() {
				L.PushNil()
			} else {
				makeValueProxy(L, val, cINTERFACE_META)
			}
		}
	}
}

// TODO: Check if we really need multiple pointer levels since pointer methods
// can be called on non-pointers.
func goToLua(L *lua.State, t reflect.Type, val reflect.Value, dontproxify bool, visited visitor) {
	if !val.IsValid() {
		L.PushNil()
		return
	}

	// Unbox interface.
	if val.Kind() == reflect.Interface && !val.IsNil() {
		val = reflect.ValueOf(val.Interface())
	}

	// Follow pointers if not proxifying. We save the original pointer Value in case we proxify.
	ptrVal := val
	for val.Kind() == reflect.Ptr {
		val = val.Elem()
	}

	if !val.IsValid() {
		L.PushNil()
		return
	}

	// As a special case, we always proxify nullv, the empty element for slices and maps.
	if val.CanInterface() && val.Interface() == nullv.Interface() {
		makeValueProxy(L, val, cInterfaceMeta)
		return
	}

	switch val.Kind() {
	case reflect.Float64, reflect.Float32:
		if !dontproxify && predeclaredScalarType(val.Type()) != nil {
			makeValueProxy(L, ptrVal, cNumberMeta)
		} else {
			L.PushNumber(val.Float())
		}
	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
		if !dontproxify && predeclaredScalarType(val.Type()) != nil {
			makeValueProxy(L, ptrVal, cNumberMeta)
		} else {
			L.PushNumber(float64(val.Int()))
		}
	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
		if !dontproxify && predeclaredScalarType(val.Type()) != nil {
			makeValueProxy(L, ptrVal, cNumberMeta)
		} else {
			L.PushNumber(float64(val.Uint()))
		}
	case reflect.String:
		if !dontproxify && predeclaredScalarType(val.Type()) != nil {
			makeValueProxy(L, ptrVal, cStringMeta)
		} else {
			L.PushString(val.String())
		}
	case reflect.Bool:
		if !dontproxify && predeclaredScalarType(val.Type()) != nil {
			makeValueProxy(L, ptrVal, cInterfaceMeta)
		} else {
			L.PushBoolean(val.Bool())
		}
	case reflect.Complex128, reflect.Complex64:
		makeValueProxy(L, ptrVal, cComplexMeta)
	case reflect.Array:
		// It needs be a pointer to be a proxy, otherwise values won't be settable.
		if !dontproxify && ptrVal.Kind() == reflect.Ptr {
			makeValueProxy(L, ptrVal, cSliceMeta)
		} else {
			// See the case of struct.
			if ptrVal.Kind() == reflect.Ptr && visited.push(ptrVal) {
				return
			}
			copySliceToTable(L, ptrVal, visited)
		}
	case reflect.Slice:
		if !dontproxify {
			makeValueProxy(L, ptrVal, cSliceMeta)
		} else {
			if visited.push(val) {
				return
			}
			copySliceToTable(L, val, visited)
		}
	case reflect.Map:
		if !dontproxify {
			makeValueProxy(L, ptrVal, cMapMeta)
		} else {
			if visited.push(val) {
				return
			}
			copyMapToTable(L, val, visited)
		}
	case reflect.Struct:
		if !dontproxify && ptrVal.Kind() == reflect.Ptr {
			if ptrVal.CanInterface() {
				switch v := ptrVal.Interface().(type) {
				case error:
					L.PushString(v.Error())
				case *LuaObject:
					v.Push()
//.........這裏部分代碼省略.........

func pushValue(state *lua.State, value interface{}) error {
	switch v := value.(type) {
	default:
		return fmt.Errorf("An item of unknown type was included in the environment or arguments of a Lua call (skipping it): %v",
			value)
	case nil:
		log.Println("Pushing nil onto lua stack")
		state.PushNil()
	case string:
		log.Println("Pushing string onto lua stack")
		state.PushString(v)
	case int:
		log.Println("Pushing int onto lua stack")
		state.PushInteger(int64(v))
	case int64:
		log.Println("Pushing int64 onto lua stack")
		state.PushInteger(v)
	case float64:
		log.Println("Pushing float64 onto lua stack")
		state.PushNumber(v)
	case bool:
		log.Println("Pushing bool onto lua stack")
		state.PushBoolean(v)

	case map[string]interface{}:
		log.Println("Pushing map[string]interface{} onto lua stack")
		state.CreateTable(0, len(v))
		for name, value := range v {
			err := pushValue(state, value)
			if err != nil {
				// error means nothing was added to stack. So pop our new table so *we* leave nothing added to the stack.
				state.Pop(1)
				return err
			}
			state.SetField(-2, name)
		}
		// then leave the table on the stack

	case ThingType:
		// These are singleton sentinel values, so load them from Lua-land.
		state.GetGlobal("world")
		state.GetField(-1, strings.Title(v.String()))
		state.Remove(-2)

	case *Thing:
		log.Println("Pushing *Thing onto lua stack")
		return pushValue(state, v.Id)
	case ThingId:
		log.Println("Pushing ThingId onto lua stack")
		// We're pushing a ThingId, so make a new userdata for it, with the Thing metatable.
		userdata := state.NewUserdata(uintptr(unsafe.Sizeof(int64(0))))
		thingPtr := (*int64)(userdata)
		*thingPtr = int64(v)
		if !state.IsUserdata(-1) {
			log.Println("!!! HOGAD JUST PUSHED NEW USERDATA BUT IT ISN'T OMG !!!")
		}
		log.Println("Pushed ThingId", *thingPtr, "onto lua stack")

		// Now make it act like a Thing.
		state.LGetMetaTable(ThingMetaTableName) // ( udata -- udata mtbl )
		state.SetMetaTable(-2)                  // ( udata mtbl -- udata )

		// Let's just check that it's that, for sures.
		if !state.IsUserdata(-1) {
			log.Println("!!! WOOP WOOP DID NOT SET METATABLE RIGHT :( !!!")
		}
	}
	return nil
}

func (p *Plugin) apiAudioVolume(l *lua.State) int {
	l.PushNumber(float64(p.instance.Audio.Volume))
	return 1
}

// Push a Go value 'val' of type 't' on the Lua stack.
// If we haven't been given a concrete type, use the type of the value
// and unbox any interfaces.
func GoToLua(L *lua.State, t reflect.Type, val reflect.Value) {
	proxify := true
	if t == nil {
		t = val.Type()
		if t.Kind() == reflect.Interface { // unbox interfaces!
			val = valueOf(val.Interface())
			t = val.Type()
		}
		proxify = false
	}
	if t.Kind() == reflect.Ptr {
		t = t.Elem()
	}
	switch t.Kind() {
	case reflect.Float64:
	case reflect.Float32:
		{
			L.PushNumber(val.Float())
		}
	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32:
		{
			L.PushNumber(float64(val.Int()))
		}
	case reflect.Uint, reflect.Uint8:
		{
			L.PushNumber(float64(val.Uint()))
		}
	case reflect.String:
		{
			L.PushString(val.String())
		}
	case reflect.Bool:
		{
			L.PushBoolean(val.Bool())
		}
	case reflect.Slice:
		{
			if proxify {
				makeValueProxy(L, val, SLICE_META)
			} else {
				CopySliceToTable(L, val)
			}
		}
	case reflect.Map:
		{
			if proxify {
				makeValueProxy(L, val, MAP_META)
			} else {
				CopyMapToTable(L, val)
			}
		}
	case reflect.Struct:
		{
			makeValueProxy(L, val, STRUCT_META)
		}
	default:
		{
			if val.IsNil() {
				L.PushNil()
			} else {
				makeValueProxy(L, val, INTERFACE_META)
			}
		}
	}
}