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flatbuffers_binaryarray.go
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/
flatbuffers_binaryarray.go
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package pua
import (
"github.com/yuin/gopher-lua"
)
type BinaryArray struct {
data []byte
}
var LuaBinaryArray = LuaUserDataType[BinaryArray]{Name: "flatbuffers_binaryarray"}
func FlatBuffers_BinaryArray_Loader(ls *lua.LState) int {
m := ls.NewTable()
ls.SetField(m, "New", ls.NewFunction(BinaryArrayNew))
ls.SetField(m, "Pack", ls.NewFunction(BinaryArrayPack))
ls.SetField(m, "Unpack", ls.NewFunction(BinaryArrayUnpack))
mt := ls.NewTable()
ls.SetField(mt, "__index", ls.NewFunction(BinaryArrayIndex))
ls.SetField(mt, "__len", ls.NewFunction(BinaryArrayLen))
ls.SetField(mt, "Slice", ls.NewFunction(BinaryArraySlice))
ls.SetField(mt, "Grow", ls.NewFunction(BinaryArrayGrow))
ls.SetField(mt, "Pad", ls.NewFunction(BinaryArrayPad))
ls.SetField(mt, "Set", ls.NewFunction(BinaryArraySet))
ls.Push(m)
return 1
}
func BinaryArrayNew(ls *lua.LState) int {
lval := ls.Get(-1)
var ba BinaryArray
switch val := lval.(type) {
case lua.LString:
ba = BinaryArray{
data: []byte(val),
}
case lua.LNumber:
ba = BinaryArray{
data: make([]byte, int(val)),
}
default:
ls.Error(lua.LString("Expect a integer size value or string to construct a binary array"), 0)
return 0
}
ls.Push(LuaBinaryArray.New(ls, ba))
return 1
}
func BinaryArrayLen(ls *lua.LState) int {
ba := LuaBinaryArray.StartMeta(ls)
ls.Push(lua.LNumber(len(ba.data)))
return 1
}
func BinaryArrayIndex(ls *lua.LState) int {
ba, key := LuaBinaryArray.StartIndex(ls)
switch key {
case "size":
ls.Push(lua.LNumber(len(ba.data)))
case "str":
ls.Push(lua.LString(ba.data))
case "data":
ls.Error(lua.LString("binaryArray data property inaccessible"), 0)
return 0
default:
ls.Push(ls.GetField(LuaBinaryArray.Metatable(ls), key))
}
return 1
}
func BinaryArraySlice(ls *lua.LState) int {
var startPos, endPos int
ba := LuaBinaryArray.StartMeta(ls)
if luaStartPos, ok := ls.Get(2).(lua.LNumber); ok {
startPos = max(int(luaStartPos), 0)
} else {
startPos = 0
}
if luaEndPos, ok := ls.Get(3).(lua.LNumber); ok {
endPos = min(int(luaEndPos), len(ba.data))
} else {
endPos = len(ba.data)
}
ls.Push(lua.LString(ba.data[startPos:endPos]))
return 1
}
func BinaryArrayGrow(ls *lua.LState) int {
ba := LuaBinaryArray.StartMeta(ls)
newsize := int(ls.CheckNumber(2))
if newsize > len(ba.data) {
newdata := make([]byte, newsize)
copy(newdata[newsize-len(ba.data):], ba.data)
ba.data = newdata
}
return 0
}
func BinaryArrayPad(ls *lua.LState) int {
ba := LuaBinaryArray.StartMeta(ls)
n := int(ls.CheckNumber(2))
startPos := int(ls.CheckNumber(3))
for i := range n {
ba.data[startPos+i] = 0
}
return 0
}
func BinaryArraySet(ls *lua.LState) int {
ba := LuaBinaryArray.StartMeta(ls)
idx := int(ls.CheckNumber(3))
value := ls.Get(2)
if num, ok := value.(lua.LNumber); ok {
ba.data[idx] = byte(num)
}
if str, ok := value.(lua.LString); ok {
ba.data[idx] = str[0]
}
return 0
}
// (fmt, ...)
// return string.pack(fmt, ...)
func BinaryArrayPack(ls *lua.LState) int {
panic("TODO")
}
// fmt, s, pos
// return string.unpack(fmt, ba.data, pos+1)
func BinaryArrayUnpack(ls *lua.LState) int {
panic("TODO")
}