wip: restore API

fieldpath/serialize-pe.go

@@ -113,14 +113,26 @@ func serializePathElementToWriter(w *builder.JSONBuilder, pe PathElement) error
 		if _, err := w.Write(peKeySepBytes); err != nil {
 			return err
 		}
-		if err := value.FieldListToJSON(*pe.Key, w); err != nil {
-			return err
+		w.WriteByte('{')
+		nrKeys := len(*pe.Key)
+		for i, f := range *pe.Key {
+			if err := w.WriteJSON(f.Name); err != nil {
+				return err
+			}
+			w.WriteByte(':')
+			if err := w.WriteJSON(f.Value.Unstructured()); err != nil {
+				return err
+			}
+			if i < nrKeys-1 {
+				w.WriteByte(',')
+			}
 		}
+		w.WriteByte('}')
 	case pe.Value != nil:
 		if _, err := w.Write(peValueSepBytes); err != nil {
 			return err
 		}
-		if err := value.ToJSON(*pe.Value, w); err != nil {
+		if err := w.WriteJSON((*pe.Value).Unstructured()); err != nil {
 			return err
 		}
 	case pe.Index != nil:

internal/builder/builder.go

@@ -48,7 +48,7 @@ func (w noNewlineWriter) Write(p []byte) (n int, err error) {
 //go:nocheckptr
 func noescape(p unsafe.Pointer) unsafe.Pointer {
 	x := uintptr(p)
-	return unsafe.Pointer(x ^ 0) //nolint:unsafeptr
+	return unsafe.Pointer(x ^ 0)
 }
 
 func (r *JSONBuilder) WriteJSON(v interface{}) error {
@@ -65,3 +65,25 @@ func (r *JSONBuilder) WriteJSON(v interface{}) error {
 
 	return nil
 }
+
+func MarshalString(input string) ([]byte, error) {
+	out, err := gojson.Marshal((*string)(noescape(unsafe.Pointer(&input))))
+	if err != nil {
+		return nil, err
+	}
+
+	runtime.KeepAlive(input)
+
+	return out, nil
+}
+
+func MarshalInterface(input interface{}) ([]byte, error) {
+	out, err := gojson.Marshal((*interface{})(noescape(unsafe.Pointer(&input))))
+	if err != nil {
+		return nil, err
+	}
+
+	runtime.KeepAlive(input)
+
+	return out, nil
+}

value/fields.go

@@ -71,25 +71,6 @@ func FieldListFromJSON(input []byte) (FieldList, error) {
 	return fields, nil
 }
 
-// FieldListToJSON is a helper function for producing a JSON document.
-func FieldListToJSON(v FieldList, w *builder.JSONBuilder) error {
-	w.WriteByte('{')
-	for i, f := range v {
-		if err := w.WriteJSON(f.Name); err != nil {
-			return err
-		}
-		w.WriteByte(':')
-		if err := w.WriteJSON(f.Value.Unstructured()); err != nil {
-			return err
-		}
-		if i < len(v)-1 {
-			w.WriteByte(',')
-		}
-	}
-	w.WriteByte('}')
-	return nil
-}
-
 // Sort sorts the field list by Name.
 func (f FieldList) Sort() {
 	if len(f) < 2 {

value/value.go

@@ -85,8 +85,8 @@ func FromJSON(input []byte) (Value, error) {
 }
 
 // ToJSON is a helper function for producing a JSON document.
-func ToJSON(v Value, w *builder.JSONBuilder) error {
-	return w.WriteJSON(v.Unstructured())
+func ToJSON(v Value) ([]byte, error) {
+	return builder.MarshalInterface(v.Unstructured())
 }
 
 // ToYAML marshals a value as YAML.