Golang State.IsTable方法代碼示例

func MessThingTellallMethod(state *lua.State, thing *Thing) int {
	state.PushGoFunction(func(state *lua.State) int {
		place := checkThing(state, 1)
		text := state.CheckString(2)

		// If arg 3 is present, it should be a table of Things to exclude.
		excludes := make(map[ThingId]bool)
		if 2 < state.GetTop() {
			if !state.IsTable(3) {
				state.ArgError(3, "expected `table` for exclude argument if present")
			}
			numExcludes := int(state.ObjLen(3))
			for i := 0; i < numExcludes; i++ {
				state.RawGeti(3, i+1)
				exclude := checkThing(state, -1)
				excludes[exclude.Id] = true
			}
		}

		for _, content := range place.GetContents() {
			if excludes[content.Id] {
				continue
			}
			if content.Client != nil {
				content.Client.Send(text)
			}
		}

		return 0
	})
	return 1
}

func popMap(L *lua.State) map[string]interface{} {
	m := make(map[string]interface{})
	L.PushNil()
	for L.Next(-2) != 0 {
		if L.IsString(-2) {
			var v interface{}
			if L.IsBoolean(-1) {
				v = L.ToBoolean(-1)
			} else if L.IsNumber(-1) {
				var t float64
				t = L.ToNumber(-1)
				if t == float64(int64(t)) {
					v = int(t)
				} else {
					v = t
				}
			} else if L.IsString(-1) {
				v = L.ToString(-1)
			} else if L.IsNil(-1) {
				v = nil
			} else if L.IsTable(-1) {
				v = popMap(L)
			}
			m[L.ToString(-2)] = v
		}
		L.Pop(1)
	}
	return m
}

func outputNumbersToStrings(L *lua.State) {
	L.GetGlobal("output")

	if !L.IsTable(-1) {
		L.NewTable()
		L.SetGlobal("output")
	}

	L.GetField(-1, "tags")
	if L.IsTable(-1) {
		// First key.
		L.PushNil()
		for L.Next(-2) != 0 {
			// Use 'key' at index -2 and 'value' at index -1.
			if L.IsString(-2) && L.IsString(-1) {
				// Convert numbers to strings.
				L.ToString(-1)
				L.SetField(-3, L.ToString(-2))
			} else {
				// Remove 'value' and keep 'key' for next iteration.
				L.Pop(1)
			}
		}
	}
	L.Pop(1)

	L.Pop(1)
}

func LuaIntTimestamp(L *lua.State) int {
	luaAssertArgnum(L, 1, "timestamp()")

	if !L.IsTable(-1) {
		panic(errors.New("Argoment of timestamp is not a table"))
		return 0
	}

	L.CheckStack(1)

	t := time.Date(GetTableInt(L, "year"), time.Month(GetTableInt(L, "month")), GetTableInt(L, "day"), GetTableInt(L, "hour"), GetTableInt(L, "minute"), GetTableInt(L, "second"), 0, time.Local)

	L.PushInteger(int64(t.Unix()))
	return 1
}

//.........這裏部分代碼省略.........
		case reflect.Uint8:
			{
				ptr := new(uint8)
				*ptr = uint8(L.ToNumber(idx))
				value = *ptr
			}
		case reflect.Uint16:
			{
				ptr := new(uint16)
				*ptr = uint16(L.ToNumber(idx))
				value = *ptr
			}
		case reflect.Uint32:
			{
				ptr := new(uint32)
				*ptr = uint32(L.ToNumber(idx))
				value = *ptr
			}
		case reflect.Uint64:
			{
				ptr := new(uint64)
				*ptr = uint64(L.ToNumber(idx))
				value = *ptr
			}
		default:
			cannotConvert(L, idx, "number", kind, t)
		}
	case lua.LUA_TTABLE:
		if t == nil {
			kind = reflect.Interface
		}
		fallthrough
	default:
		istable := L.IsTable(idx)
		// if we don't know the type and the Lua object is userdata,
		// then it might be a proxy for a Go object. Otherwise wrap
		// it up as a LuaObject.
		if t == nil && !istable {
			if isValueProxy(L, idx) {
				return unwrapProxy(L, idx)
			} else {
				return NewLuaObject(L, idx)
			}
		}
		switch kind {
		case reflect.Slice:
			{
				// if we get a table, then copy its values to a new slice
				if istable {
					value = CopyTableToSlice(L, t, idx)
				} else {
					value = unwrapProxyOrComplain(L, idx)
				}
			}
		case reflect.Map:
			{
				if istable {
					value = CopyTableToMap(L, t, idx)
				} else {
					value = unwrapProxyOrComplain(L, idx)
				}
			}
		case reflect.Struct:
			{
				if istable {
					value = CopyTableToStruct(L, t, idx)

//.........這裏部分代碼省略.........
		case reflect.Int64:
			ptr := new(int64)
			*ptr = int64(L.ToNumber(idx))
			value = *ptr
		case reflect.Uint:
			ptr := new(uint)
			*ptr = uint(L.ToNumber(idx))
			value = *ptr
		case reflect.Uint8:
			ptr := new(uint8)
			*ptr = uint8(L.ToNumber(idx))
			value = *ptr
		case reflect.Uint16:
			ptr := new(uint16)
			*ptr = uint16(L.ToNumber(idx))
			value = *ptr
		case reflect.Uint32:
			ptr := new(uint32)
			*ptr = uint32(L.ToNumber(idx))
			value = *ptr
		case reflect.Uint64:
			ptr := new(uint64)
			*ptr = uint64(L.ToNumber(idx))
			value = *ptr
		default:
			value = reflect.Zero(t).Interface()
		}
	case lua.LUA_TTABLE:
		if t == nil {
			kind = reflect.Interface
		}
		fallthrough
	default:
		istable := L.IsTable(idx)
		// If we don't know the type and the Lua object is userdata,
		// then it might be a proxy for a Go object. Otherwise wrap
		// it up as a LuaObject.
		if t == nil && !istable {
			if isValueProxy(L, idx) {
				v, _ := valueOfProxy(L, idx)
				return v.Interface()
			}
			return NewLuaObject(L, idx)
		}
		switch kind {
		case reflect.Array:
			if istable {
				ptr := L.ToPointer(idx)
				if val, ok := visited[ptr]; ok {
					return val
				}
				value = copyTableToSlice(L, t, idx, visited)
			} else {
				value = mustUnwrapProxy(L, idx)
			}
		case reflect.Slice:
			// if we get a table, then copy its values to a new slice
			if istable {
				ptr := L.ToPointer(idx)
				if val, ok := visited[ptr]; ok {
					return val
				}
				value = copyTableToSlice(L, t, idx, visited)
			} else {
				value = mustUnwrapProxy(L, idx)
			}

// Convert a Lua value 'idx' on the stack to the Go value of desired type 't'. Handles
// numerical and string types in a straightforward way, and will convert tables to
// either map or slice types.
func LuaToGo(L *lua.State, t reflect.Type, idx int) interface{} {
	var value interface{}
	var kind reflect.Kind

	if t == nil { // let the Lua type drive the conversion...
		switch L.Type(idx) {
		case lua.LUA_TNIL:
			return nil // well, d'oh
		case lua.LUA_TBOOLEAN:
			kind = reflect.Bool
		case lua.LUA_TSTRING:
			kind = reflect.String
		case lua.LUA_TTABLE:
			kind = reflect.Interface
		default:
			return NewLuaObject(L, idx)
		}
	} else if t.Kind() == reflect.Ptr {
		kind = t.Elem().Kind()
	} else {
		kind = t.Kind()
	}

	switch kind {
	// various numerical types are tedious but straightforward
	case reflect.Float64:
		{
			ptr := new(float64)
			*ptr = L.ToNumber(idx)
			value = *ptr
		}
	case reflect.Float32:
		{
			ptr := new(float32)
			*ptr = float32(L.ToNumber(idx))
			value = *ptr
		}
	case reflect.Int:
		{
			ptr := new(int)
			*ptr = int(L.ToNumber(idx))
			value = *ptr
		}
	case reflect.Int8:
		{
			ptr := new(byte)
			*ptr = byte(L.ToNumber(idx))
			value = *ptr
		}
	case reflect.String:
		{
			tos := L.ToString(idx)
			ptr := new(string)
			*ptr = tos
			value = *ptr
		}
	case reflect.Bool:
		{
			ptr := new(bool)
			*ptr = bool(L.ToBoolean(idx))
			value = *ptr
		}
	case reflect.Slice:
		{
			// if we get a table, then copy its values to a new slice
			if L.IsTable(idx) {
				value = CopyTableToSlice(L, t, idx)
			} else {
				value = unwrapProxy(L, idx)
			}
		}
	case reflect.Map:
		{
			if L.IsTable(idx) {
				value = CopyTableToMap(L, t, idx)
			} else {
				value = unwrapProxy(L, idx)
			}
		}
	case reflect.Struct:
		{
			if L.IsTable(idx) {
				value = CopyTableToStruct(L, t, idx)
			} else {
				value = unwrapProxy(L, idx)
			}
		}
	case reflect.Interface:
		{
			if L.IsTable(idx) {
				// have to make an executive decision here: tables with non-zero
				// length are assumed to be slices!
				if L.ObjLen(idx) > 0 {
					value = CopyTableToSlice(L, nil, idx)
				} else {
					value = CopyTableToMap(L, nil, idx)
				}
//.........這裏部分代碼省略.........

// 'exist' is optional.
func run(L *lua.State, registryIndex string, code string, input *inputInfo, output *outputInfo, exist *inputInfo) error {
	// Restore the sandbox.
	err := L.DoString(luaRestoreSandbox)
	if err != nil {
		log.Fatal("Cannot load function to restore sandbox", err)
	}
	L.PushString(registryWhitelist)
	L.GetTable(lua.LUA_REGISTRYINDEX)
	err = L.Call(1, 0)
	if err != nil {
		log.Fatal("Failed to restore sandbox", err)
	}

	goToLua(L, "input", *input)
	goToLua(L, "output", *output)

	if exist != nil {
		goToLua(L, "existinfo", *exist)
	}

	// Shortcut (mostly for prescript and postscript).
	L.GetGlobal("input")
	L.GetField(-1, "tags")
	L.SetGlobal("i")
	L.Pop(1)
	L.GetGlobal("output")
	L.GetField(-1, "tags")
	L.SetGlobal("o")
	L.Pop(1)

	// Call the compiled script.
	L.PushString(registryIndex)
	L.GetTable(lua.LUA_REGISTRYINDEX)
	L.PushString(code)
	if L.IsTable(-2) {
		L.GetTable(-2)
		if L.IsFunction(-1) {
			err := L.Call(0, 0)
			if err != nil {
				L.SetTop(0)
				return fmt.Errorf("%s", err)
			}
		} else {
			L.Pop(1)
		}
	} else {
		L.Pop(1)
	}
	L.Pop(1)

	// Allow tags to be numbers for convenience.
	outputNumbersToStrings(L)

	L.GetGlobal("output")
	r := luar.LuaToGo(L, reflect.TypeOf(*output), -1)
	L.Pop(1)

	*output = r.(outputInfo)

	return nil
}