+ * @return The length of the string. @c 0 is returned if there is an error.
+ * @ingroup Embryo_Data_String_Group
+ */
+EAPI int embryo_data_string_length_get(Embryo_Program *ep, Embryo_Cell *str_cell);
+
+/**
+ * @brief Copies the string starting at the given cell to the given buffer.
+ *
+ * @param[in] ep The program the cell is part of.
+ * @param[in] str_cell Pointer to the first cell of the string.
+ * @param[out] dst The given buffer.