Harden backup import and restore coverage

1 files changed, 19 insertions, 0 deletions

diff --git a/src/mcp/tools/common/history.c b/src/mcp/tools/common/history.c
index 9f08e84..0e600d4 100644
--- a/src/mcp/tools/common/history.c
+++ b/src/mcp/tools/common/history.c
@@ -245,6 +245,25 @@ tiny_history_index_build(const tiny_store_t *store)
   return index;
 }
 
+uint64_t
+tiny_history_index_memory_estimate(const tiny_history_index_t *index)
+{
+  uint64_t total;
+  size_t position;
+  if (!index)
+    {
+      return 0;
+    }
+  total = sizeof(*index) + index->capacity * sizeof(*index->buckets)
+          + index->slot_capacity * sizeof(*index->slots);
+  for (position = 0; position < index->count; ++position)
+    {
+      total += strlen(index->buckets[position].session_id) + 1;
+      total += index->buckets[position].capacity * sizeof(*index->buckets[position].entries);
+    }
+  return total;
+}
+
 void
 tiny_history_index_free(tiny_history_index_t *index)
 {