399 lines
11 KiB
Go
399 lines
11 KiB
Go
package main
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import (
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"go/ast"
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"go/token"
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"slices"
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"strconv"
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"github.com/admin-else/strom/proto_generator/protodef"
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"github.com/admin-else/strom/util"
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"github.com/go-viper/mapstructure/v2"
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)
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func DefaultEncoder(_ *Generator, varToSet ast.Expr, _ any, _ string) (s []ast.Stmt, err error) {
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s = Stmts(
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Assign121(
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Ident("err"),
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Call(SelectorExprAndStr(varToSet, "Encode"), Ident("w")),
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),
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IfErrNil(),
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)
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return
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}
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func ContainerEncoder(g *Generator, varToSet ast.Expr, dataRaw any, name string) (s []ast.Stmt, err error) {
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var data protodef.Container
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err = mapstructure.Decode(dataRaw, &data)
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if err != nil {
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return
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}
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g.ContainerStack = append(g.ContainerStack, ContainerStackEntry{
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Data: data,
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VarToSet: varToSet,
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})
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defer func() { g.ContainerStack = g.ContainerStack[:len(g.ContainerStack)-1] }()
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for _, field := range data {
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var statements []ast.Stmt
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cName := util.CamelCase(field.Name)
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if field.Anon {
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cName = "Anon"
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}
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statements, err = g.VisitEncoder(SelectorExprAndStr(varToSet, cName), field.Type, name+util.CamelCase(cName))
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if err != nil {
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return
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}
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s = append(s, statements...)
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}
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return
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}
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func SimpleTypeEncoder(_ *Generator, data ast.Expr, _ any, _ string) (s []ast.Stmt, err error) {
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s = Stmts(
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Assign121(
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Ident("err"),
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Call(Selector("binary", "Write"), Ident("w"), Selector("binary", "BigEndian"), data),
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),
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IfErrNil(),
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)
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return
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}
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func ArrayEncoder(g *Generator, varToSet ast.Expr, dataRaw any, name string) (s []ast.Stmt, err error) {
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var data protodef.Array
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err = mapstructure.Decode(dataRaw, &data)
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if err != nil {
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return
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}
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if data.CountType == nil {
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data.CountType = "varint"
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}
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ct, err := g.VisitType(data.CountType)
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if err != nil {
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return
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}
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iName := "i" + name
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//s, err = g.VisitEncoder(varToSet, data.Type, name)
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var s1 []ast.Stmt
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if data.Count == "" {
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s1, err = g.VisitEncoder(Call(ct, Call(Ident("len"), varToSet)), data.CountType, name)
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if err != nil {
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return
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}
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}
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s2, err := g.VisitEncoder(Index(varToSet, Ident(iName)), data.Type, name+"Inner")
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if err != nil {
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}
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s2 = Stmts(ForRange(Ident(iName), Call(Ident("len"), varToSet), NewBlock(s2)))
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s = append(s1, s2...)
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return
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}
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func ToDoEncoder(_ *Generator, _ ast.Expr, _ any, _ string) (s []ast.Stmt, err error) {
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err = ToDoError
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return
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}
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func OptionEncoder(g *Generator, data ast.Expr, dataRaw any, name string) (s []ast.Stmt, err error) {
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cond := NotEquals(data, Nil())
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s1, err := g.VisitEncoder(cond, "bool", name)
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if err != nil {
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return
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}
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s2, err := g.VisitEncoder(DeRef(data), dataRaw, name)
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if err != nil {
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return
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}
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s = append(s1, If(cond, NewBlock(s2)))
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return
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}
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func BufferEncoder(g *Generator, varToSet ast.Expr, dataRaw any, name string) (s []ast.Stmt, err error) {
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var data protodef.Buffer
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err = mapstructure.Decode(dataRaw, &data)
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if err != nil {
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return
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}
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if data.CountType != nil {
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var countType ast.Expr
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countType, err = g.VisitType(data.CountType)
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if err != nil {
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return
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}
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var s2 []ast.Stmt
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s2, err = g.VisitEncoder(Call(countType, Call(Ident("len"), varToSet)), data.CountType, name)
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if err != nil {
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return
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}
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s = append(s, s2...)
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} else {
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s = append(s, Define121(Ident("arr"), varToSet))
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varToSet = MultiIndex(Ident("arr"), nil, nil, nil)
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}
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s = append(s, Assign(Exprs(Ident("_"), Ident("err")), Exprs(Call(Selector("w", "Write"), varToSet))))
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s = append(s, IfErrNil())
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return
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}
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func BitFieldEncoder(g *Generator, varToSet ast.Expr, dataRaw any, name string) (s []ast.Stmt, err error) {
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var data protodef.BitField
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err = mapstructure.Decode(dataRaw, &data)
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if err != nil {
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return
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}
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totalSize := 0
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for _, field := range data {
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totalSize += field.Size
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}
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packedVarName := name + "Packed"
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packedExpr := Ident(packedVarName)
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packedTypeStr := "uint" + strconv.Itoa(totalSize)
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s = append(s, VarStmt(packedVarName, Ident(packedTypeStr)))
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slices.Reverse(data)
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shiftBy := 0
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for _, field := range data {
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boolFix := packedTypeStr
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if field.Size == 1 {
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boolFix = "proto_base.Bool2" + boolFix
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}
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s = append(s, OrAssign( // lisp ahh
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packedExpr,
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LeftShift(
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Grouping(
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BinAnd(
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Call(
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Ident(boolFix),
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SelectorExprAndStr(
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varToSet,
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util.CamelCase(field.Name),
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),
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),
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NumLitHex((1<<field.Size)-1),
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),
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),
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NumLitHex(shiftBy),
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),
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))
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shiftBy += field.Size
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}
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encodePacked, err := g.VisitEncoder(packedExpr, "u"+strconv.Itoa(totalSize), name)
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if err != nil {
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return
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}
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s = append(s, encodePacked...)
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return
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}
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func SwitchEncoder(g *Generator, varToSet ast.Expr, dataRaw any, name string) (s []ast.Stmt, err error) {
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var data protodef.Switch
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err = mapstructure.Decode(dataRaw, &data)
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if err != nil {
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return
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}
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compareToExpr, cet, err := g.ParseCompareTo(data.CompareTo)
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if err != nil {
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return
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}
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for _, fName := range util.OrderedKeys(data.Fields) {
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fType := data.Fields[fName]
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e := MultiTypeFix(fName, &cet)
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if e == nil {
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continue
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}
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var tType ast.Expr
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tType, err = g.VisitType(fType)
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if err != nil {
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return
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}
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varName := name
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if fType == "void" {
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varName = "_"
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}
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s1 := Define(Exprs(Ident(varName), Ident("ok")), Exprs(TypeAssert(varToSet, tType)))
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s2 := If(Not(Ident("ok")), NewBlockEllipsis(Assign121(Ident("err"), Selector("proto_base", "BadTypeError")), Return()))
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var caseDecodeValueStmts []ast.Stmt
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caseDecodeValueStmts, err = g.VisitEncoder(Ident(name), fType, name)
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if err != nil {
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return
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}
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var caseStmts []ast.Stmt
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caseStmts = append(caseStmts, s1)
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caseStmts = append(caseStmts, s2)
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caseStmts = append(caseStmts, caseDecodeValueStmts...)
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s = append(s, Case(Exprs(e), caseStmts))
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}
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if data.Default != nil {
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var tType ast.Expr
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tType, err = g.VisitType(data.Default)
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if err != nil {
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return
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}
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s1 := Define(Exprs(Ident("_"), Ident("ok")), Exprs(TypeAssert(varToSet, tType)))
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s2 := If(Not(Ident("ok")), NewBlockEllipsis(Assign121(Ident("err"), Selector("proto_base", "BadTypeError")), Return()))
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defaultStmts := []ast.Stmt{s1, s2}
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var defaultEncodingStmts []ast.Stmt
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defaultEncodingStmts, err = g.VisitEncoder(TypeAssert(varToSet, tType), data.Default, name)
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if err != nil {
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return
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}
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defaultStmts = append(defaultStmts, defaultEncodingStmts...)
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s = append(s, Case(nil, defaultStmts))
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}
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if len(s) != 0 {
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s = Stmts(SwitchStmt(compareToExpr, NewBlock(s)))
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}
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return
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}
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func TypeForwardEncoder(g *Generator, varToSet ast.Expr, dataRaw any, name string) (s []ast.Stmt, err error) {
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var data protodef.TypeForward
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if err = mapstructure.Decode(dataRaw, &data); err != nil {
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return
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}
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return g.VisitEncoder(varToSet, data.Type, name)
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}
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func MapperEncoder(g *Generator, varToSet ast.Expr, dataRaw any, name string) (s []ast.Stmt, err error) {
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var data protodef.Mapper
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err = mapstructure.Decode(dataRaw, &data)
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if err != nil {
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return
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}
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kType, err := g.VisitType(data.Type)
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if err != nil {
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return
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}
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mName := name + "ReverseMap"
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exprs := Exprs()
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for _, k := range util.OrderedKeys(data.Mappings) {
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v := data.Mappings[k]
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exprs = append(exprs, KeyValueExpr(StrLit(v), NumLitStr(k)))
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}
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g.Decl(mName, token.VAR, CompLit(MapType(Ident("string"), kType), exprs))
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vName := "v" + name
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s1 := VarStmt(vName, kType)
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s2 := Assign(Exprs(Ident(vName), Ident("err")), Exprs(Call(Selector("proto_base", "ErroringIndex"), Ident(mName), varToSet)))
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s3 := IfErrNil()
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s4, err := g.VisitEncoder(Ident(vName), data.Type, name)
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if err != nil {
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return
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}
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s = append(s, s1)
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s = append(s, s2)
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s = append(s, s3)
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s = append(s, s4...)
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return
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}
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func StringEncoder(_ *Generator, varToSet ast.Expr, _ any, _ string) (s []ast.Stmt, err error) {
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s = Stmts(
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Assign121(Ident("err"), Call(Selector("proto_base", "EncodeString"), Ident("w"), varToSet)), IfErrNil())
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return
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}
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func UUIDEncoder(_ *Generator, varToSet ast.Expr, _ any, _ string) (s []ast.Stmt, err error) {
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s = Stmts(Assign(Exprs(Ident("_"), Ident("err")), Exprs(Call(Selector("w", "Write"), MultiIndex(varToSet, nil, nil, nil)))), IfErrNil())
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return
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}
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func RegistryEntryHolderEncoder(g *Generator, varToSet ast.Expr, dataRaw any, name string) (s []ast.Stmt, err error) {
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var data protodef.EntryHolderSet
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err = mapstructure.Decode(dataRaw, &data)
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otherwiseType, err := g.VisitType(data.Otherwise.Type)
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if err != nil {
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return
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}
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knownTypeName := name + "KnownType"
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encode0statements, err := g.VisitEncoder(NumLit(0), "varint", name+"Zero")
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if err != nil {
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return
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}
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otherwiseEncodeStatements, err := g.VisitEncoder(Ident(knownTypeName), data.Otherwise.Type, name+"Otherwise")
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otherwiseEncodeStatements = append(encode0statements, otherwiseEncodeStatements...)
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if err != nil {
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return
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}
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baseType, err := g.VisitType("varint")
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if err != nil {
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return
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}
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baseEncodeStatements, err := g.VisitEncoder(Ident(knownTypeName), "varint", name)
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if err != nil {
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return
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}
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statements := Stmts()
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statements = append(statements, Case(Exprs(baseType), baseEncodeStatements))
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statements = append(statements, Case(Exprs(otherwiseType), otherwiseEncodeStatements))
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statements = append(statements, Case(nil, Stmts(Assign121(Ident("err"), Selector("proto_base", "BadTypeError")))))
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s = Stmts(TypeSwitch(Define121(Ident(knownTypeName), TypeAssert(varToSet, Ident("type"))), NewBlock(statements)))
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return
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}
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func VarIntEncoder(g *Generator, varToSet ast.Expr, dataRaw any, name string) (s []ast.Stmt, err error) {
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s = Stmts(Assign121(Ident("err"), Call(Selector("proto_base", "EncodeVarInt"), Ident("w"), varToSet)), IfErrNil())
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return
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}
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func VarLongEncoder(g *Generator, varToSet ast.Expr, dataRaw any, name string) (s []ast.Stmt, err error) {
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s = Stmts(Assign121(Ident("err"), Call(Selector("proto_base", "EncodeVarLong"), Ident("w"), varToSet)), IfErrNil())
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return
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}
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func VoidEncoder(_ *Generator, _ ast.Expr, _ any, _ string) (s []ast.Stmt, err error) {
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return
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}
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func (g *Generator) RegisterEncoderNatives() {
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g.EncoderNatives = map[string]FunctionGeneratorFunc{
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"container": ContainerEncoder,
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"array": ArrayEncoder,
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"option": OptionEncoder,
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"bitflags": TypeForwardEncoder,
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"switch": SwitchEncoder,
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"mapper": MapperEncoder,
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"buffer": BufferEncoder,
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"bitfield": BitFieldEncoder,
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"void": VoidEncoder,
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"varint": VarIntEncoder,
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"varlong": VarLongEncoder,
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"anonymousNbt": DefaultEncoder,
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"anonOptionalNbt": DefaultEncoder, // I have no idea what the difference is between these two
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"UUID": UUIDEncoder,
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"restBuffer": DefaultEncoder,
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"lpVec3": ToDoEncoder,
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"string": StringEncoder,
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"f32": SimpleTypeEncoder,
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"f64": SimpleTypeEncoder,
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"i8": SimpleTypeEncoder,
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"i16": SimpleTypeEncoder,
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"i32": SimpleTypeEncoder,
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"i64": SimpleTypeEncoder,
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"u8": SimpleTypeEncoder,
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"u16": SimpleTypeEncoder,
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"u32": SimpleTypeEncoder,
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"u64": SimpleTypeEncoder,
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"bool": SimpleTypeEncoder,
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"registryEntryHolder": RegistryEntryHolderEncoder,
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"registryEntryHolderSet": ToDoEncoder,
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"entityMetadataLoop": ToDoEncoder,
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"topBitSetTerminatedArray": ToDoEncoder,
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"todo": ToDoEncoder,
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}
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}
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