func LuaNumParamsOk(L *lua.State, num_params int, name string) bool {
n := L.GetTop()
if n != num_params {
err_str := fmt.Sprintf("%s expects exactly %d parameters, got %d.", name, num_params, n)
LuaDoError(L, err_str)
return false
}
return true
}
func UpdatePlayer(p *Player, L *lua.State) {
buffer := bytes.NewBuffer(nil)
L.GetGlobal("store")
err := LuaEncodeTable(buffer, L, -1)
if err != nil {
base.Warn().Printf("Error encoding lua state: %v", err)
}
L.Pop(1)
p.Lua_store = buffer.Bytes()
}
// Gets the id out of the table at the specified index and returns the
// associated Entity, or nil if there is none.
func LuaToEntity(L *lua.State, game *Game, index int) *Entity {
L.PushString("id")
L.GetTable(index - 1)
id := EntityId(L.ToInteger(-1))
L.Pop(1)
return game.EntityById(id)
}
func LuaToSpawnPoint(L *lua.State, game *Game, pos int) *house.SpawnPoint {
L.PushString("id")
L.GetTable(pos - 1)
index := L.ToInteger(-1)
L.Pop(1)
if index < 0 || index >= len(game.House.Floors[0].Spawns) {
return nil
}
return game.House.Floors[0].Spawns[index]
}
// decodes a lua table and pushes it onto the stack
func LuaDecodeTable(r io.Reader, L *lua.State, g *Game) error {
L.NewTable()
var cont byte
err := binary.Read(r, binary.LittleEndian, &cont)
for cont != 0 && err == nil {
for i := 0; i < 2 && err == nil; i++ {
err = LuaDecodeValue(r, L, g)
}
if err == nil {
err = binary.Read(r, binary.LittleEndian, &cont)
}
L.SetTable(-3)
}
if err != nil {
return err
}
return nil
}
func (exec aoeExec) Push(L *lua.State, g *game.Game) {
exec.BasicActionExec.Push(L, g)
if L.IsNil(-1) {
return
}
L.PushString("Pos")
game.LuaPushPoint(L, exec.X, exec.Y)
L.SetTable(-3)
}
// Decodes a value from the reader and pushes it onto the stack
func LuaDecodeValue(r io.Reader, L *lua.State, g *Game) error {
var le luaEncodable
err := binary.Read(r, binary.LittleEndian, &le)
if err != nil {
return err
}
switch le {
case luaEncBool:
var v byte
err = binary.Read(r, binary.LittleEndian, &v)
L.PushBoolean(v == 1)
case luaEncNumber:
var f float64
err = binary.Read(r, binary.LittleEndian, &f)
L.PushNumber(f)
case luaEncNil:
L.PushNil()
case luaEncEntity:
var id uint64
err = binary.Read(r, binary.LittleEndian, &id)
ent := g.EntityById(EntityId(id))
LuaPushEntity(L, ent)
if ent != nil {
base.Log().Printf("LUA: Push Ent %s", ent.Name)
} else {
base.Log().Printf("LUA: Push Ent NIL")
}
case luaEncTable:
err = LuaDecodeTable(r, L, g)
case luaEncString:
var length uint32
err = binary.Read(r, binary.LittleEndian, &length)
if err != nil {
return err
}
sb := make([]byte, length)
err = binary.Read(r, binary.LittleEndian, &sb)
L.PushString(string(sb))
default:
return errors.New(fmt.Sprintf("Unknown lua value id == %d.", le))
}
if err != nil {
return err
}
return nil
}
func (exec summonExec) Push(L *lua.State, g *game.Game) {
exec.BasicActionExec.Push(L, g)
if L.IsNil(-1) {
return
}
_, x, y := g.FromVertex(exec.Pos)
L.PushString("Pos")
game.LuaPushPoint(L, x, y)
L.SetTable(-3)
}
func (exec basicAttackExec) Push(L *lua.State, g *game.Game) {
exec.BasicActionExec.Push(L, g)
if L.IsNil(-1) {
return
}
target := g.EntityById(exec.Target)
L.PushString("Target")
game.LuaPushEntity(L, target)
L.SetTable(-3)
}
func LuaEncodeTable(w io.Writer, L *lua.State, index int) error {
L.PushNil()
for L.Next(index-1) != 0 {
binary.Write(w, binary.LittleEndian, byte(1))
err := LuaEncodeValue(w, L, -2)
if err != nil {
return err
}
err = LuaEncodeValue(w, L, -1)
if err != nil {
return err
}
L.Pop(1)
}
return binary.Write(w, binary.LittleEndian, byte(0))
}
func (exec *moveExec) Push(L *lua.State, g *game.Game) {
exec.BasicActionExec.Push(L, g)
if L.IsNil(-1) {
return
}
L.PushString("Path")
L.NewTable()
for i := range exec.Path {
L.PushInteger(i + 1)
_, x, y := g.FromVertex(exec.Path[i])
game.LuaPushPoint(L, x, y)
L.SetTable(-3)
}
L.SetTable(-3)
}
func LuaDoError(L *lua.State, err_str string) {
base.Error().Printf(err_str)
L.PushString(err_str)
L.SetExecutionLimit(1)
}
func (a *Move) Push(L *lua.State) {
L.NewTable()
L.PushString("Type")
L.PushString("Move")
L.SetTable(-3)
}
func LuaCheckParamsOk(L *lua.State, name string, params ...LuaType) bool {
fmt.Sprintf("%s(")
n := L.GetTop()
if n != len(params) {
LuaDoError(L, fmt.Sprintf("Got %d parameters to %s.", n, luaMakeSigniature(name, params)))
return false
}
for i := -n; i < 0; i++ {
ok := false
switch params[i+n] {
case LuaInteger:
ok = L.IsNumber(i)
case LuaFloat:
ok = L.IsNumber(i)
case LuaBoolean:
ok = L.IsBoolean(i)
case LuaString:
ok = L.IsString(i)
case LuaEntity:
if L.IsTable(i) {
L.PushNil()
for L.Next(i-1) != 0 {
if L.ToString(-2) == "type" && L.ToString(-1) == "Entity" {
ok = true
}
L.Pop(1)
}
}
case LuaPoint:
if L.IsTable(i) {
var x, y bool
L.PushNil()
for L.Next(i-1) != 0 {
if L.ToString(-2) == "X" {
x = true
}
if L.ToString(-2) == "Y" {
y = true
}
L.Pop(1)
}
ok = x && y
}
case LuaRoom:
if L.IsTable(i) {
var floor, room, door bool
L.PushNil()
for L.Next(i-1) != 0 {
switch L.ToString(-2) {
case "floor":
floor = true
case "room":
room = true
case "door":
door = true
}
L.Pop(1)
}
ok = floor && room && !door
}
case LuaDoor:
if L.IsTable(i) {
var floor, room, door bool
L.PushNil()
for L.Next(i-1) != 0 {
switch L.ToString(-2) {
case "floor":
floor = true
case "room":
room = true
case "door":
door = true
}
L.Pop(1)
}
ok = floor && room && door
}
case LuaSpawnPoint:
if L.IsTable(i) {
L.PushNil()
for L.Next(i-1) != 0 {
if L.ToString(-2) == "type" && L.ToString(-1) == "SpawnPoint" {
ok = true
}
L.Pop(1)
}
}
case LuaArray:
// Make sure that all of the indices 1..length are there, and no others.
check := make(map[int]int)
if L.IsTable(i) {
L.PushNil()
for L.Next(i-1) != 0 {
if L.IsNumber(-2) {
check[L.ToInteger(-2)]++
} else {
break
}
L.Pop(1)
}
}
count := 0
for i := 1; i <= len(check); i++ {
if _, ok := check[i]; ok {
count++
}
}
ok = (count == len(check))
case LuaTable:
ok = L.IsTable(i)
case LuaAnything:
ok = true
}
if !ok {
LuaDoError(L, fmt.Sprintf("Unexpected parameters to %s.", luaMakeSigniature(name, params)))
return false
}
}
return true
}
// Pushes an entity onto the stack, it is a table containing the following:
// e.id -> EntityId of this entity
// e.name -> Name as displayed to the user
// e.gear_options -> Table mapping gear to icon for all available gear
// e.gear -> Name of the selected gear, nil if none is selected
// e.actions -> Array of actions this entity has available
func LuaPushEntity(L *lua.State, _ent *Entity) {
if _ent == nil {
L.PushNil()
return
}
// id and Name can be added to the ent table as static data since they
// never change.
L.NewTable()
L.PushString("Name")
L.PushString(_ent.Name)
L.SetTable(-3)
L.PushString("id")
L.PushInteger(int(_ent.Id))
L.SetTable(-3)
L.PushString("type")
L.PushString("Entity")
L.SetTable(-3)
id := _ent.Id
// Meta table for the Entity so that any dynamic data is generated
// on-the-fly
LuaPushSmartFunctionTable(L, FunctionTable{
"Conditions": func() {
ent := _ent.Game().EntityById(id)
L.NewTable()
for _, condition := range ent.Stats.ConditionNames() {
L.PushString(condition)
L.PushBoolean(true)
L.SetTable(-3)
}
},
"Side": func() {
ent := _ent.Game().EntityById(id)
L.NewTable()
sides := map[string]Side{
"Denizen": SideHaunt,
"Intruder": SideExplorers,
"Npc": SideNpc,
"Object": SideObject,
}
for str, side := range sides {
L.PushString(str)
L.PushBoolean(ent.Side() == side)
L.SetTable(-3)
}
},
"State": func() {
ent := _ent.Game().EntityById(id)
L.PushString(ent.Sprite().State())
},
"Master": func() {
ent := _ent.Game().EntityById(id)
L.NewTable()
for key, val := range ent.Ai_data {
L.PushString(key)
L.PushString(val)
L.SetTable(-3)
}
},
"GearOptions": func() {
ent := _ent.Game().EntityById(id)
L.NewTable()
if ent.ExplorerEnt != nil {
for _, gear_name := range ent.ExplorerEnt.Gear_names {
var g Gear
g.Defname = gear_name
base.GetObject("gear", &g)
L.PushString(gear_name)
L.PushString(g.Large_icon.Path.String())
L.SetTable(-3)
}
}
},
"Gear": func() {
ent := _ent.Game().EntityById(id)
if ent.ExplorerEnt != nil && ent.ExplorerEnt.Gear != nil {
L.PushString(ent.ExplorerEnt.Gear.Name)
} else {
L.PushNil()
}
},
"Actions": func() {
ent := _ent.Game().EntityById(id)
L.NewTable()
for _, action := range ent.Actions {
L.PushString(action.String())
action.Push(L)
L.SetTable(-3)
}
},
"Pos": func() {
ent := _ent.Game().EntityById(id)
x, y := ent.Pos()
LuaPushPoint(L, x, y)
},
"Corpus": func() {
ent := _ent.Game().EntityById(id)
L.PushInteger(ent.Stats.Corpus())
},
"Ego": func() {
ent := _ent.Game().EntityById(id)
L.PushInteger(ent.Stats.Ego())
},
"HpCur": func() {
ent := _ent.Game().EntityById(id)
L.PushInteger(ent.Stats.HpCur())
},
"HpMax": func() {
ent := _ent.Game().EntityById(id)
L.PushInteger(ent.Stats.HpMax())
},
"ApCur": func() {
ent := _ent.Game().EntityById(id)
L.PushInteger(ent.Stats.ApCur())
},
"ApMax": func() {
ent := _ent.Game().EntityById(id)
L.PushInteger(ent.Stats.ApMax())
},
"Info": func() {
ent := _ent.Game().EntityById(id)
L.NewTable()
L.PushString("LastEntityThatIAttacked")
LuaPushEntity(L, ent.Game().EntityById(ent.Info.LastEntThatIAttacked))
L.SetTable(-3)
L.PushString("LastEntThatAttackedMe")
LuaPushEntity(L, ent.Game().EntityById(ent.Info.LastEntThatAttackedMe))
L.SetTable(-3)
},
})
L.SetMetaTable(-2)
}
func LuaPushDoor(L *lua.State, game *Game, door *house.Door) {
for fi, f := range game.House.Floors {
for ri, r := range f.Rooms {
for di, d := range r.Doors {
if d == door {
L.NewTable()
L.PushString("type")
L.PushString("door")
L.SetTable(-3)
L.PushString("floor")
L.PushInteger(fi)
L.SetTable(-3)
L.PushString("room")
L.PushInteger(ri)
L.SetTable(-3)
L.PushString("door")
L.PushInteger(di)
L.SetTable(-3)
return
}
}
}
}
L.PushNil()
}
func (exec interactExec) Push(L *lua.State, g *game.Game) {
exec.BasicActionExec.Push(L, g)
if L.IsNil(-1) {
return
}
L.PushString("Toggle Door")
L.PushBoolean(exec.Toggle_door)
L.SetTable(-3)
if exec.Toggle_door {
L.PushString("Door")
game.LuaPushDoor(L, g, exec.getDoor(g))
} else {
L.PushString("Target")
game.LuaPushEntity(L, g.EntityById(exec.Target))
}
L.SetTable(-3)
}
func (a *AoeAttack) Push(L *lua.State) {
L.NewTable()
L.PushString("Type")
L.PushString("Aoe Attack")
L.SetTable(-3)
L.PushString("Name")
L.PushString(a.Name)
L.SetTable(-3)
L.PushString("Ap")
L.PushInteger(a.Ap)
L.SetTable(-3)
L.PushString("Damage")
L.PushInteger(a.Damage)
L.SetTable(-3)
L.PushString("Strength")
L.PushInteger(a.Strength)
L.SetTable(-3)
L.PushString("Range")
L.PushInteger(a.Range)
L.SetTable(-3)
L.PushString("Diameter")
L.PushInteger(a.Diameter)
L.SetTable(-3)
L.PushString("Ammo")
if a.Current_ammo == -1 {
L.PushInteger(1000)
} else {
L.PushInteger(a.Current_ammo)
}
L.SetTable(-3)
}
func LuaIsEntity(L *lua.State, index int) bool {
L.PushString("type")
L.GetTable(index - 1)
if L.IsNil(-1) {
L.Pop(1)
return false
}
if L.ToString(-1) == "Entity" {
L.Pop(1)
return true
}
L.Pop(1)
return false
}
func LuaPushDims(L *lua.State, dx, dy int) {
L.NewTable()
L.PushString("Dx")
L.PushInteger(dx)
L.SetTable(-3)
L.PushString("Dy")
L.PushInteger(dy)
L.SetTable(-3)
}
func LuaPushPoint(L *lua.State, x, y int) {
L.NewTable()
L.PushString("X")
L.PushInteger(x)
L.SetTable(-3)
L.PushString("Y")
L.PushInteger(y)
L.SetTable(-3)
}
// Encodes a lua value, only bool, number, nil, table, and string can be
// encoded. If an unencodable value is encountered an error will be
// returned.
func LuaEncodeValue(w io.Writer, L *lua.State, index int) error {
var err1, err2, err3 error
switch {
case L.IsBoolean(index):
err1 = binary.Write(w, binary.LittleEndian, luaEncBool)
var v byte = 0
if L.ToBoolean(index) {
v = 1
}
err2 = binary.Write(w, binary.LittleEndian, v)
case L.IsNumber(index):
err1 = binary.Write(w, binary.LittleEndian, luaEncNumber)
err2 = binary.Write(w, binary.LittleEndian, L.ToNumber(index))
case L.IsNil(index):
err1 = binary.Write(w, binary.LittleEndian, luaEncNil)
case LuaIsEntity(L, index):
err1 = binary.Write(w, binary.LittleEndian, luaEncEntity)
L.PushString("id")
L.GetTable(index - 1)
err2 = binary.Write(w, binary.LittleEndian, uint64(L.ToInteger(-1)))
L.Pop(1)
case L.IsTable(index):
err1 = binary.Write(w, binary.LittleEndian, luaEncTable)
err2 = LuaEncodeTable(w, L, index)
case L.IsString(index):
err1 = binary.Write(w, binary.LittleEndian, luaEncString)
str := L.ToString(index)
err2 = binary.Write(w, binary.LittleEndian, uint32(len(str)))
err3 = binary.Write(w, binary.LittleEndian, []byte(str))
default:
return errors.New(fmt.Sprintf("Cannot encode lua type id == %d.", L.Type(index)))
}
switch {
case err1 != nil:
return err1
case err2 != nil:
return err2
case err3 != nil:
return err3
}
return nil
}
func LuaStringifyParam(L *lua.State, index int) string {
if L.IsTable(index) {
str := "table <not implemented> {"
return str
first := true
L.PushNil()
for L.Next(index-1) != 0 {
if !first {
str += ", "
}
first = false
str += fmt.Sprintf("(%s) -> (%s)", LuaStringifyParam(L, -2), LuaStringifyParam(L, -1))
L.Pop(1)
}
return str + "}"
}
if L.IsBoolean(index) {
if L.ToBoolean(index) {
return "true"
}
return "false"
}
return L.ToString(index)
}
func LuaToDoor(L *lua.State, game *Game, index int) *house.Door {
L.PushString("floor")
L.GetTable(index - 1)
floor := L.ToInteger(-1)
L.Pop(1)
L.PushString("room")
L.GetTable(index - 1)
room := L.ToInteger(-1)
L.Pop(1)
L.PushString("door")
L.GetTable(index - 1)
door := L.ToInteger(-1)
L.Pop(1)
if floor < 0 || floor >= len(game.House.Floors) {
return nil
}
if room < 0 || room >= len(game.House.Floors[floor].Rooms) {
return nil
}
if door < 0 || door >= len(game.House.Floors[floor].Rooms[room].Doors) {
return nil
}
return game.House.Floors[floor].Rooms[room].Doors[door]
}
func (a *Interact) Push(L *lua.State) {
L.NewTable()
L.PushString("Type")
L.PushString("Interact")
L.SetTable(-3)
L.PushString("Ap")
L.PushInteger(a.Ap)
L.SetTable(-3)
L.PushString("Range")
L.PushInteger(a.Range)
L.SetTable(-3)
}
func LuaPushSpawnPoint(L *lua.State, game *Game, sp *house.SpawnPoint) {
index := -1
for i, spawn := range game.House.Floors[0].Spawns {
if spawn == sp {
index = i
}
}
if index == -1 {
LuaDoError(L, "Unable to push SpawnPoint, not found in the house.")
L.NewTable()
L.PushString("id")
L.PushInteger(-1)
L.SetTable(-3)
L.PushString("type")
L.PushString("SpawnPoint")
L.SetTable(-3)
return
}
L.NewTable()
x, y := sp.Pos()
dx, dy := sp.Dims()
L.PushString("id")
L.PushInteger(index)
L.SetTable(-3)
L.PushString("type")
L.PushString("SpawnPoint")
L.SetTable(-3)
L.PushString("Name")
L.PushString(sp.Name)
L.SetTable(-3)
L.PushString("Pos")
LuaPushPoint(L, x, y)
L.SetTable(-3)
L.PushString("Dims")
LuaPushDims(L, dx, dy)
L.SetTable(-3)
}
func LuaToPoint(L *lua.State, pos int) (x, y int) {
L.PushString("X")
L.GetTable(pos - 1)
x = L.ToInteger(-1)
L.Pop(1)
L.PushString("Y")
L.GetTable(pos - 1)
y = L.ToInteger(-1)
L.Pop(1)
return
}
func LuaPushSmartFunctionTable(L *lua.State, ft FunctionTable) {
// Copy it just in case - I can't imagine someone changing it after passing
// it to this function, but I don't want to take any chances.
myft := make(FunctionTable)
for n, f := range ft {
myft[n] = f
}
names := make([]string, len(myft))[0:0]
for name := range myft {
names = append(names, name)
}
sort.Strings(names)
valid_selectors := "["
for i, name := range names {
if i > 0 {
valid_selectors += ", "
}
valid_selectors += fmt.Sprintf("'%s'", name)
}
valid_selectors += "]."
L.NewTable()
L.PushString("__index")
L.PushGoFunction(func(L *lua.State) int {
name := L.ToString(-1)
if f, ok := myft[name]; ok {
f()
} else {
base.Error().Printf("'%s' is not a valid selector, valid seletors are %s", name, valid_selectors)
L.PushNil()
}
return 1
})
L.SetTable(-3)
}
func (bae BasicActionExec) Push(L *lua.State, g *Game) {
ent := g.EntityById(bae.Ent)
if bae.Index < 0 || bae.Index >= len(ent.Actions) {
base.Error().Printf("Tried to push an exec for an invalid action index: '%s' %d.", ent.Name)
L.PushNil()
return
}
L.NewTable()
L.PushString("Action")
ent.Actions[bae.Index].Push(L)
L.SetTable(-3)
L.PushString("Ent")
LuaPushEntity(L, ent)
L.SetTable(-3)
}
func LuaPushRoom(L *lua.State, game *Game, room *house.Room) {
for fi, f := range game.House.Floors {
for ri, r := range f.Rooms {
if r == room {
L.NewTable()
L.PushString("type")
L.PushString("room")
L.SetTable(-3)
L.PushString("floor")
L.PushInteger(fi)
L.SetTable(-3)
L.PushString("room")
L.PushInteger(ri)
L.SetTable(-3)
L.PushString("Pos")
LuaPushPoint(L, room.X, room.Y)
L.SetTable(-3)
L.PushString("Dims")
LuaPushDims(L, room.Size.Dx, room.Size.Dy)
L.SetTable(-3)
return
}
}
}
L.PushNil()
}