-size_t datasheet_get_column_cnt (const struct datasheet *);
-bool datasheet_insert_columns (struct datasheet *,
- const union value[], size_t cnt,
- size_t before);
-void datasheet_delete_columns (struct datasheet *, size_t start, size_t cnt);
+size_t datasheet_get_n_columns (const struct datasheet *);
+bool datasheet_insert_column (struct datasheet *,
+ const union value *, int width, size_t before);
+void datasheet_delete_columns (struct datasheet *, size_t start, size_t n);