Added function tng_molecule_existing_add()

1 files changed, 13 insertions, 0 deletions

diff --git a/include/tng_io.h b/include/tng_io.h
index 4df522b..7028bdc 100644
--- a/include/tng_io.h
+++ b/include/tng_io.h
@@ -1418,6 +1418,19 @@ tng_function_status DECLSPECDLLEXPORT tng_molecule_w_id_add
                  tng_molecule_t *molecule);
 
 /**
+ * @brief Add an existing molecule (from a molecule container) to the trajectory.
+ * @param tng_data is the trajectory data container containing the block..
+ * @param molecule is the molecule to add to the trajectory.
+ * @pre \code tng_data != 0 \endcode The trajectory container (tng_data)
+ * must be initialised before using it.
+ * @return TNG_SUCCESS (0) if successful or TNG_CRITICAL (2) if a major error
+ * has occured.
+ */
+tng_function_status DECLSPECDLLEXPORT tng_molecule_existing_add
+                (tng_trajectory_t tng_data,
+                 tng_molecule_t molecule);
+
+/**
  * @brief Set the name of a molecule.
  * @param tng_data is the trajectory data container containing the molecule..
  * @param molecule is the molecule to rename.