+static mailbox_t *new_mailbox (void *ctx, const char *name, const char *addr)
+{
+ mailbox_t *mailbox;
+
+ mailbox = talloc (ctx, mailbox_t);
+ if (! mailbox)
+ return NULL;
+
+ mailbox->name = talloc_strdup (mailbox, name);
+ mailbox->addr = talloc_strdup (mailbox, addr);
+ mailbox->count = 1;
+
+ return mailbox;
+}
+
+/* Returns TRUE iff name and addr is duplicate. If not, stores the
+ * name/addr pair in order to detect subsequent duplicates. */
+static notmuch_bool_t
+is_duplicate (const search_context_t *ctx, const char *name, const char *addr)
+{
+ char *key;
+ mailbox_t *mailbox;
+
+ key = talloc_asprintf (ctx->format, "%s <%s>", name, addr);
+ if (! key)
+ return FALSE;
+
+ mailbox = g_hash_table_lookup (ctx->addresses, key);
+ if (mailbox) {
+ mailbox->count++;
+ talloc_free (key);
+ return TRUE;
+ }
+
+ mailbox = new_mailbox (ctx->format, name, addr);
+ if (! mailbox)
+ return FALSE;
+
+ g_hash_table_insert (ctx->addresses, key, mailbox);
+
+ return FALSE;
+}
+