From: Jani Nikula <jani@nikula.org>
To: notmuch@notmuchmail.org
Subject: [PATCH v6 1/6] lib: add function to get the number of threads matching a search
Date: Sun, 13 Nov 2011 23:15:30 +0200 [thread overview]
Message-ID: <a6b88f21c57d64605f25235a3a82264fc837d252.1321217854.git.jani@nikula.org> (raw)
In-Reply-To: <cover.1321217854.git.jani@nikula.org>
In-Reply-To: <cover.1321217854.git.jani@nikula.org>
Add function notmuch_query_count_threads() to get the number of threads
matching a search. This is done by performing a search and figuring out the
number of unique thread IDs in the matching messages, a significantly
heavier operation than notmuch_query_count_messages().
Signed-off-by: Jani Nikula <jani@nikula.org>
---
lib/notmuch.h | 14 ++++++++++++++
lib/query.cc | 44 ++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 58 insertions(+), 0 deletions(-)
diff --git a/lib/notmuch.h b/lib/notmuch.h
index c4330e4..9f23a10 100644
--- a/lib/notmuch.h
+++ b/lib/notmuch.h
@@ -609,6 +609,20 @@ notmuch_threads_destroy (notmuch_threads_t *threads);
unsigned
notmuch_query_count_messages (notmuch_query_t *query);
+/* Return the number of threads matching a search.
+ *
+ * This function performs a search and returns the number of unique thread IDs
+ * in the matching messages. This is the same as number of threads matching a
+ * search.
+ *
+ * Note that this is a significantly heavier operation than
+ * notmuch_query_count_messages().
+ *
+ * If an error occurs, this function may return 0.
+ */
+unsigned
+notmuch_query_count_threads (notmuch_query_t *query);
+
/* Get the thread ID of 'thread'.
*
* The returned string belongs to 'thread' and as such, should not be
diff --git a/lib/query.cc b/lib/query.cc
index 6f02b04..b6c0f12 100644
--- a/lib/query.cc
+++ b/lib/query.cc
@@ -457,3 +457,47 @@ notmuch_query_count_messages (notmuch_query_t *query)
return count;
}
+
+unsigned
+notmuch_query_count_threads (notmuch_query_t *query)
+{
+ notmuch_messages_t *messages;
+ GHashTable *hash;
+ unsigned int count;
+ notmuch_sort_t sort;
+
+ sort = query->sort;
+ query->sort = NOTMUCH_SORT_UNSORTED;
+ messages = notmuch_query_search_messages (query);
+ query->sort = sort;
+ if (messages == NULL)
+ return 0;
+
+ hash = g_hash_table_new_full (g_str_hash, g_str_equal, NULL, NULL);
+ if (hash == NULL) {
+ talloc_free (messages);
+ return 0;
+ }
+
+ while (notmuch_messages_valid (messages)) {
+ notmuch_message_t *message = notmuch_messages_get (messages);
+ const char *thread_id = notmuch_message_get_thread_id (message);
+ char *thread_id_copy = talloc_strdup (messages, thread_id);
+ if (unlikely (thread_id_copy == NULL)) {
+ notmuch_message_destroy (message);
+ count = 0;
+ goto DONE;
+ }
+ g_hash_table_insert (hash, thread_id_copy, NULL);
+ notmuch_message_destroy (message);
+ notmuch_messages_move_to_next (messages);
+ }
+
+ count = g_hash_table_size (hash);
+
+ DONE:
+ g_hash_table_unref (hash);
+ talloc_free (messages);
+
+ return count;
+}
--
1.7.5.4
next prev parent reply other threads:[~2011-11-13 21:15 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-11-13 21:15 [PATCH v6 0/6] lib/cli: limit number of messages in search results Jani Nikula
2011-11-13 21:15 ` Jani Nikula [this message]
2011-11-13 21:15 ` [PATCH v6 2/6] cli: add options --first and --maxitems to notmuch search Jani Nikula
2011-11-13 23:12 ` Jameson Graef Rollins
2011-11-14 10:34 ` Jani Nikula
2011-11-15 1:20 ` David Bremner
2011-11-13 21:15 ` [PATCH v6 3/6] cli: drop unused code from notmuch count Jani Nikula
2011-11-13 21:15 ` [PATCH v6 4/6] cli: add support for --output parameter in " Jani Nikula
2011-11-13 21:15 ` [PATCH v6 5/6] test: add tests for " Jani Nikula
2011-11-13 21:15 ` [PATCH v6 6/6] test: add tests for notmuch search --first and --maxitems Jani Nikula
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