config: introduce an optional event stream while parsing

diff --git a/split-index.c b/split-index.c
index 615f4cac05f7d381b3c31831b6fd9e8a72e1f982..284d04d67f885d8905130e138c45cc4ff4fbdc30 100644 (file)
--- a/split-index.c
+++ b/split-index.c
@@ -167,10 +167,9 @@ void merge_base_index(struct index_state *istate)
 
        ewah_free(si->delete_bitmap);
        ewah_free(si->replace_bitmap);
-       free(si->saved_cache);
+       FREE_AND_NULL(si->saved_cache);
        si->delete_bitmap  = NULL;
        si->replace_bitmap = NULL;
-       si->saved_cache    = NULL;
        si->saved_cache_nr = 0;
 }
 
@@ -239,6 +238,8 @@ void prepare_to_write_split_index(struct index_state *istate)
                                ALLOC_GROW(entries, nr_entries+1, nr_alloc);
                                entries[nr_entries++] = ce;
                        }
+                       if (is_null_oid(&ce->oid))
+                               istate->drop_cache_tree = 1;
                }
        }
 
@@ -317,3 +318,25 @@ void replace_index_entry_in_base(struct index_state *istate,
                istate->split_index->base->cache[new->index - 1] = new;
        }
 }
+
+void add_split_index(struct index_state *istate)
+{
+       if (!istate->split_index) {
+               init_split_index(istate);
+               istate->cache_changed |= SPLIT_INDEX_ORDERED;
+       }
+}
+
+void remove_split_index(struct index_state *istate)
+{
+       if (istate->split_index) {
+               /*
+                * can't discard_split_index(&the_index); because that
+                * will destroy split_index->base->cache[], which may
+                * be shared with the_index.cache[]. So yeah we're
+                * leaking a bit here.
+                */
+               istate->split_index = NULL;
+               istate->cache_changed |= SOMETHING_CHANGED;
+       }
+}