98 lines
2.2 KiB
Go
98 lines
2.2 KiB
Go
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package jsonvalue
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import "reflect"
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func cloneTrustedMap(src map[string]any) map[string]any {
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if src == nil {
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return nil
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}
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out := make(map[string]any, len(src))
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for k, v := range src {
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out[k] = CloneTrusted(v)
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}
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return out
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}
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// CloneTrusted detaches a previously accepted value without revalidating it.
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func CloneTrusted(value any) any {
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if value == nil {
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return nil
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}
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switch v := value.(type) {
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case map[string]any:
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return cloneTrustedMap(v)
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case []any:
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out := make([]any, len(v))
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for i, item := range v {
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out[i] = CloneTrusted(item)
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}
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return out
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case []string:
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if v == nil {
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return []string(nil)
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}
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return append([]string{}, v...)
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case []byte:
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if v == nil {
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return []byte(nil)
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}
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return append([]byte{}, v...)
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default:
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return cloneTrustedReflect(reflect.ValueOf(value)).Interface()
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}
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}
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func cloneTrustedReflect(value reflect.Value) reflect.Value {
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if !value.IsValid() {
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return value
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}
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switch value.Kind() {
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case reflect.Interface:
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if value.IsNil() {
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return reflect.Zero(value.Type())
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}
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copied := cloneTrustedReflect(value.Elem())
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if copied.IsValid() && copied.Type().AssignableTo(value.Type()) {
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return copied
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}
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out := reflect.New(value.Type()).Elem()
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out.Set(copied)
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return out
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case reflect.Pointer:
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if value.IsNil() {
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return reflect.Zero(value.Type())
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}
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out := reflect.New(value.Type().Elem())
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out.Elem().Set(cloneTrustedReflect(value.Elem()))
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return out
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case reflect.Map:
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if value.IsNil() {
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return reflect.Zero(value.Type())
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}
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out := reflect.MakeMapWithSize(value.Type(), value.Len())
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iter := value.MapRange()
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for iter.Next() {
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out.SetMapIndex(cloneTrustedReflect(iter.Key()), cloneTrustedReflect(iter.Value()))
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}
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return out
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case reflect.Slice:
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if value.IsNil() {
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return reflect.Zero(value.Type())
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}
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out := reflect.MakeSlice(value.Type(), value.Len(), value.Cap())
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for i := 0; i < value.Len(); i++ {
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out.Index(i).Set(cloneTrustedReflect(value.Index(i)))
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}
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return out
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case reflect.Array:
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out := reflect.New(value.Type()).Elem()
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for i := 0; i < value.Len(); i++ {
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out.Index(i).Set(cloneTrustedReflect(value.Index(i)))
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}
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return out
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default:
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return value
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}
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}
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