tree data UPDATE add ability to duplicate tree with priv pointers

Signed-off-by: Igor Ryzhov <[email protected]>

src/tree_data.c

@@ -1738,6 +1738,9 @@ lyd_dup_r(const struct lyd_node *node, const struct ly_ctx *trg_ctx, struct lyd_
     } else {
         dup->flags = (node->flags & (LYD_DEFAULT | LYD_EXT)) | LYD_NEW;
     }
+    if (options & LYD_DUP_WITH_PRIV) {
+        dup->priv = node->priv;
+    }
     if (trg_ctx == LYD_CTX(node)) {
         dup->schema = node->schema;
     } else {

src/tree_data.h

@@ -1962,6 +1962,8 @@ LIBYANG_API_DECL LY_ERR lyd_compare_meta(const struct lyd_meta *meta1, const str
 #define LYD_DUP_WITH_FLAGS   0x08  /**< Also copy any data node flags. That will cause the duplicated data to preserve
                                         its validation/default node state. */
 #define LYD_DUP_NO_EXT       0x10  /**< Do not duplicate nodes with the ::LYD_EXT flag (nested extension instance data). */
+#define LYD_DUP_WITH_PRIV    0x20  /**< Also copy data node private pointer. Only the pointer is copied, it still points
+                                        to the same data. */
 
 /** @} dupoptions */