Views are now rollbacked if an error occurs, and unfinished views and

columns are deleted when an OBIDMS is opened.

src/obiview.h

@@ -538,6 +538,43 @@ int obi_select_lines(Obiview_p view, index_t* line_nbs);
 int obi_save_and_close_view(Obiview_p view);
 
 
+/**
+ * @brief Goes through all the view files of a DMS and deletes views that have
+ *        not been flagged as finished (file extension renamed from '.obiview_unfinished'
+ *        to '.obiview' and finished boolean set to true in the file, done by finish_view()).
+ *
+ * @param dms A pointer on an OBIDMS.
+ *
+ * @returns A value indicating the success of the operation.
+ * @retval 0 if the operation was successfully completed.
+ * @retval -1 if an error occurred.
+ *
+ * @since October 2017
+ * @author Celine Mercier (celine.mercier@metabarcoding.org)
+ */
+int obi_clean_unfinished_views(OBIDMS_p dms);
+
+
+/**
+ * @brief Frees and deletes an opened, writable view and the columns it created.
+ *
+ * The view and column files are deleted and the structures are freed.
+ *
+ * @warning The view pointer becomes invalid, as well as the pointers on
+ *          the columns created by the view.
+ *
+ * @param view A pointer on the writable view to rollback.
+ *
+ * @returns A value indicating the success of the operation.
+ * @retval 0 if the operation was successfully completed.
+ * @retval -1 if an error occurred.
+ *
+ * @since October 2017
+ * @author Celine Mercier (celine.mercier@metabarcoding.org)
+ */
+int obi_rollback_view(Obiview_p view);
+
+
 /**
  * @brief Creates an OBI_INT column with the line count of the view it belongs to, and sets all lines to 1.
  *