lib: constify arguments to notmuch_query_get_*

[notmuch] / lib / query.cc

diff --git a/lib/query.cc b/lib/query.cc
index 69668a451ac7570481792ab5aa4cc81a132f8581..8cf0a077e5e74e54267d0470a25b51fa9e84475d 100644 (file)
--- a/lib/query.cc
+++ b/lib/query.cc
@@ -80,7 +80,7 @@ notmuch_query_create (notmuch_database_t *notmuch,
     if (_debug_query ())
        fprintf (stderr, "Query string is:\n%s\n", query_string);
 
-    query = talloc (NULL, notmuch_query_t);
+    query = talloc (notmuch, notmuch_query_t);
     if (unlikely (query == NULL))
        return NULL;
 
@@ -98,7 +98,7 @@ notmuch_query_create (notmuch_database_t *notmuch,
 }
 
 const char *
-notmuch_query_get_query_string (notmuch_query_t *query)
+notmuch_query_get_query_string (const notmuch_query_t *query)
 {
     return query->query_string;
 }
@@ -117,7 +117,7 @@ notmuch_query_set_sort (notmuch_query_t *query, notmuch_sort_t sort)
 }
 
 notmuch_sort_t
-notmuch_query_get_sort (notmuch_query_t *query)
+notmuch_query_get_sort (const notmuch_query_t *query)
 {
     return query->sort;
 }
@@ -173,6 +173,19 @@ _notmuch_exclude_tags (notmuch_query_t *query, Xapian::Query xquery)
 
 notmuch_messages_t *
 notmuch_query_search_messages (notmuch_query_t *query)
+{
+    notmuch_status_t status;
+    notmuch_messages_t *messages;
+    status = notmuch_query_search_messages_st (query, &messages);
+    if (status)
+       return NULL;
+    else
+       return messages;
+}
+
+notmuch_status_t
+notmuch_query_search_messages_st (notmuch_query_t *query,
+                                 notmuch_messages_t **out)
 {
     notmuch_database_t *notmuch = query->notmuch;
     const char *query_string = query->query_string;
@@ -180,7 +193,7 @@ notmuch_query_search_messages (notmuch_query_t *query)
 
     messages = talloc (query, notmuch_mset_messages_t);
     if (unlikely (messages == NULL))
-       return NULL;
+       return NOTMUCH_STATUS_OUT_OF_MEMORY;
 
     try {
 
@@ -279,15 +292,19 @@ notmuch_query_search_messages (notmuch_query_t *query)
        messages->iterator = mset.begin ();
        messages->iterator_end = mset.end ();
 
-       return &messages->base;
+       *out = &messages->base;
+       return NOTMUCH_STATUS_SUCCESS;
 
     } catch (const Xapian::Error &error) {
-       fprintf (stderr, "A Xapian exception occurred performing query: %s\n",
-                error.get_msg().c_str());
-       fprintf (stderr, "Query string was: %s\n", query->query_string);
+       _notmuch_database_log (notmuch,
+                              "A Xapian exception occurred performing query: %s\n"
+                              "Query string was: %s\n",
+                              error.get_msg().c_str(),
+                              query->query_string);
+
        notmuch->exception_reported = TRUE;
        talloc_free (messages);
-       return NULL;
+       return NOTMUCH_STATUS_XAPIAN_EXCEPTION;
     }
 }
 
@@ -412,24 +429,39 @@ _notmuch_threads_destructor (notmuch_threads_t *threads)
     return 0;
 }
 
+
 notmuch_threads_t *
 notmuch_query_search_threads (notmuch_query_t *query)
+{
+    notmuch_status_t status;
+    notmuch_threads_t *threads;
+    status = notmuch_query_search_threads_st (query, &threads);
+    if (status)
+       return NULL;
+    else
+       return threads;
+}
+
+notmuch_status_t
+notmuch_query_search_threads_st (notmuch_query_t *query,
+                                notmuch_threads_t **out)
 {
     notmuch_threads_t *threads;
     notmuch_messages_t *messages;
+    notmuch_status_t status;
 
     threads = talloc (query, notmuch_threads_t);
     if (threads == NULL)
-       return NULL;
+       return NOTMUCH_STATUS_OUT_OF_MEMORY;
     threads->doc_ids = NULL;
     talloc_set_destructor (threads, _notmuch_threads_destructor);
 
     threads->query = query;
 
-    messages = notmuch_query_search_messages (query);
-    if (messages == NULL) {
-           talloc_free (threads);
-           return NULL;
+    status = notmuch_query_search_messages_st (query, &messages);
+    if (status) {
+       talloc_free (threads);
+       return status;
     }
 
     threads->doc_ids = g_array_new (FALSE, FALSE, sizeof (unsigned int));
@@ -445,10 +477,11 @@ notmuch_query_search_threads (notmuch_query_t *query)
     if (! _notmuch_doc_id_set_init (threads, &threads->match_set,
                                    threads->doc_ids)) {
        talloc_free (threads);
-       return NULL;
+       return NOTMUCH_STATUS_OUT_OF_MEMORY;
     }
 
-    return threads;
+    *out = threads;
+    return NOTMUCH_STATUS_SUCCESS;
 }
 
 void
@@ -462,6 +495,9 @@ notmuch_threads_valid (notmuch_threads_t *threads)
 {
     unsigned int doc_id;
 
+    if (! threads)
+       return FALSE;
+
     while (threads->doc_id_pos < threads->doc_ids->len) {
        doc_id = g_array_index (threads->doc_ids, unsigned int,
                                threads->doc_id_pos);
@@ -554,14 +590,22 @@ notmuch_query_count_messages (notmuch_query_t *query)
 
        enquire.set_query (final_query);
 
-       mset = enquire.get_mset (0, notmuch->xapian_db->get_doccount ());
+       /*
+        * Set the checkatleast parameter to the number of documents
+        * in the database to make get_matches_estimated() exact.
+        */
+       mset = enquire.get_mset (0, notmuch->xapian_db->get_doccount (),
+                                notmuch->xapian_db->get_doccount ());
 
        count = mset.get_matches_estimated();
 
     } catch (const Xapian::Error &error) {
-       fprintf (stderr, "A Xapian exception occurred: %s\n",
-                error.get_msg().c_str());
-       fprintf (stderr, "Query string was: %s\n", query->query_string);
+       _notmuch_database_log (notmuch,
+                              "A Xapian exception occurred performing query: %s\n"
+                              "Query string was: %s\n",
+                              error.get_msg().c_str(),
+                              query->query_string);
+
     }
 
     return count;
@@ -574,10 +618,14 @@ notmuch_query_count_threads (notmuch_query_t *query)
     GHashTable *hash;
     unsigned int count;
     notmuch_sort_t sort;
+    notmuch_status_t status;
 
     sort = query->sort;
     query->sort = NOTMUCH_SORT_UNSORTED;
-    messages = notmuch_query_search_messages (query);
+    status = notmuch_query_search_messages_st (query, &messages);
+    if (status)
+       return 0;
+
     query->sort = sort;
     if (messages == NULL)
        return 0;
@@ -610,3 +658,9 @@ notmuch_query_count_threads (notmuch_query_t *query)
 
     return count;
 }
+
+notmuch_database_t *
+notmuch_query_get_database (const notmuch_query_t *query)
+{
+    return query->notmuch;
+}