X-Git-Url: https://git.notmuchmail.org/git?p=notmuch;a=blobdiff_plain;f=lib%2Fquery.cc;h=59e9141a50cc1f46c5fd48e3c2e2598dac01d22b;hp=1cc768f887db5736fa1ec3399e68c9af32a6253e;hb=dfacfe14f337b6603ba0784e4a395489923fd6dd;hpb=38698d86596af64fa25c118dafef0249155ca7a4

diff --git a/lib/query.cc b/lib/query.cc
index 1cc768f8..59e9141a 100644
--- a/lib/query.cc
+++ b/lib/query.cc
@@ -13,7 +13,7 @@
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see http://www.gnu.org/licenses/ .
+ * along with this program.  If not, see https://www.gnu.org/licenses/ .
  *
  * Author: Carl Worth <cworth@cworth.org>
  */
@@ -29,6 +29,9 @@ struct _notmuch_query {
     notmuch_sort_t sort;
     notmuch_string_list_t *exclude_terms;
     notmuch_exclude_t omit_excluded;
+    notmuch_bool_t parsed;
+    Xapian::Query xapian_query;
+    std::set<std::string> terms;
 };
 
 typedef struct _notmuch_mset_messages {
@@ -71,6 +74,14 @@ _debug_query (void)
     return (env && strcmp (env, "") != 0);
 }
 
+/* Explicit destructor call for placement new */
+static int
+_notmuch_query_destructor (notmuch_query_t *query) {
+    query->xapian_query.~Query();
+    query->terms.~set<std::string>();
+    return 0;
+}
+
 notmuch_query_t *
 notmuch_query_create (notmuch_database_t *notmuch,
 		      const char *query_string)
@@ -80,10 +91,16 @@ 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;
 
+    new (&query->xapian_query) Xapian::Query ();
+    new (&query->terms) std::set<std::string> ();
+    query->parsed = FALSE;
+
+    talloc_set_destructor (query, _notmuch_query_destructor);
+
     query->notmuch = notmuch;
 
     query->query_string = talloc_strdup (query, query_string);
@@ -97,8 +114,46 @@ notmuch_query_create (notmuch_database_t *notmuch,
     return query;
 }
 
+static notmuch_status_t
+_notmuch_query_ensure_parsed (notmuch_query_t *query)
+{
+    if (query->parsed)
+	return NOTMUCH_STATUS_SUCCESS;
+
+    try {
+	query->xapian_query =
+	    query->notmuch->query_parser->
+		parse_query (query->query_string, NOTMUCH_QUERY_PARSER_FLAGS);
+
+       /* Xapian doesn't support skip_to on terms from a query since
+	*  they are unordered, so cache a copy of all terms in
+	*  something searchable.
+	*/
+
+	for (Xapian::TermIterator t = query->xapian_query.get_terms_begin ();
+	     t != query->xapian_query.get_terms_end (); ++t)
+	    query->terms.insert (*t);
+
+	query->parsed = TRUE;
+
+    } catch (const Xapian::Error &error) {
+	if (!query->notmuch->exception_reported) {
+	    _notmuch_database_log (query->notmuch,
+				   "A Xapian exception occurred parsing query: %s\n",
+				   error.get_msg ().c_str ());
+	    _notmuch_database_log_append (query->notmuch,
+					  "Query string was: %s\n",
+					  query->query_string);
+	    query->notmuch->exception_reported = TRUE;
+	}
+
+	return NOTMUCH_STATUS_XAPIAN_EXCEPTION;
+    }
+    return NOTMUCH_STATUS_SUCCESS;
+}
+
 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 +172,7 @@ 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;
 }
@@ -125,7 +180,25 @@ notmuch_query_get_sort (notmuch_query_t *query)
 void
 notmuch_query_add_tag_exclude (notmuch_query_t *query, const char *tag)
 {
-    char *term = talloc_asprintf (query, "%s%s", _find_prefix ("tag"), tag);
+    notmuch_status_t status;
+    char *term;
+
+    status = _notmuch_query_ensure_parsed (query);
+    /* The following is not ideal error handling, but to avoid
+     * breaking the ABI, we can live with it for now. In particular at
+     * least in the notmuch CLI, any syntax error in the query is
+     * caught in a later call to _notmuch_query_ensure_parsed with a
+     * better error path.
+     *
+     * TODO: add status return to this function.
+     */
+    if (status)
+	return;
+
+    term = talloc_asprintf (query, "%s%s", _find_prefix ("tag"), tag);
+    if (query->terms.count(term) != 0)
+	return; /* XXX report ignoring exclude? */
+
     _notmuch_string_list_append (query->exclude_terms, term);
 }
 
@@ -145,42 +218,57 @@ _notmuch_messages_destructor (notmuch_mset_messages_t *messages)
 }
 
 /* Return a query that matches messages with the excluded tags
- * registered with query.  Any tags that explicitly appear in xquery
- * will not be excluded, and will be removed from the list of exclude
- * tags.  The caller of this function has to combine the returned
+ * registered with query. The caller of this function has to combine the returned
  * query appropriately.*/
 static Xapian::Query
-_notmuch_exclude_tags (notmuch_query_t *query, Xapian::Query xquery)
+_notmuch_exclude_tags (notmuch_query_t *query)
 {
     Xapian::Query exclude_query = Xapian::Query::MatchNothing;
 
     for (notmuch_string_node_t *term = query->exclude_terms->head; term;
 	 term = term->next) {
-	Xapian::TermIterator it = xquery.get_terms_begin ();
-	Xapian::TermIterator end = xquery.get_terms_end ();
-	for (; it != end; it++) {
-	    if ((*it).compare (term->string) == 0)
-		break;
-	}
-	if (it == end)
-	    exclude_query = Xapian::Query (Xapian::Query::OP_OR,
-				    exclude_query, Xapian::Query (term->string));
-	else
-	    term->string = talloc_strdup (query, "");
+	exclude_query = Xapian::Query (Xapian::Query::OP_OR,
+				       exclude_query, Xapian::Query (term->string));
     }
     return exclude_query;
 }
 
 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)
+{
+    return _notmuch_query_search_documents (query, "mail", out);
+}
+
+notmuch_status_t
+_notmuch_query_search_documents (notmuch_query_t *query,
+				 const char *type,
+				 notmuch_messages_t **out)
 {
     notmuch_database_t *notmuch = query->notmuch;
     const char *query_string = query->query_string;
     notmuch_mset_messages_t *messages;
+    notmuch_status_t status;
+
+    status = _notmuch_query_ensure_parsed (query);
+    if (status)
+	return status;
 
     messages = talloc (query, notmuch_mset_messages_t);
     if (unlikely (messages == NULL))
-	return NULL;
+	return NOTMUCH_STATUS_OUT_OF_MEMORY;
 
     try {
 
@@ -195,36 +283,30 @@ notmuch_query_search_messages (notmuch_query_t *query)
 	Xapian::Enquire enquire (*notmuch->xapian_db);
 	Xapian::Query mail_query (talloc_asprintf (query, "%s%s",
 						   _find_prefix ("type"),
-						   "mail"));
-	Xapian::Query string_query, final_query, exclude_query;
+						   type));
+	Xapian::Query final_query, exclude_query;
 	Xapian::MSet mset;
 	Xapian::MSetIterator iterator;
-	unsigned int flags = (Xapian::QueryParser::FLAG_BOOLEAN |
-			      Xapian::QueryParser::FLAG_PHRASE |
-			      Xapian::QueryParser::FLAG_LOVEHATE |
-			      Xapian::QueryParser::FLAG_BOOLEAN_ANY_CASE |
-			      Xapian::QueryParser::FLAG_WILDCARD |
-			      Xapian::QueryParser::FLAG_PURE_NOT);
 
 	if (strcmp (query_string, "") == 0 ||
 	    strcmp (query_string, "*") == 0)
 	{
 	    final_query = mail_query;
 	} else {
-	    string_query = notmuch->query_parser->
-		parse_query (query_string, flags);
 	    final_query = Xapian::Query (Xapian::Query::OP_AND,
-					 mail_query, string_query);
+					 mail_query, query->xapian_query);
 	}
 	messages->base.excluded_doc_ids = NULL;
 
-	if (query->exclude_terms) {
-	    exclude_query = _notmuch_exclude_tags (query, final_query);
+	if ((query->omit_excluded != NOTMUCH_EXCLUDE_FALSE) && (query->exclude_terms)) {
+	    exclude_query = _notmuch_exclude_tags (query);
 
-	    if (query->omit_excluded != NOTMUCH_EXCLUDE_FALSE)
+	    if (query->omit_excluded == NOTMUCH_EXCLUDE_TRUE ||
+		query->omit_excluded == NOTMUCH_EXCLUDE_ALL)
+	    {
 		final_query = Xapian::Query (Xapian::Query::OP_AND_NOT,
 					     final_query, exclude_query);
-	    else {
+	    } else { /* NOTMUCH_EXCLUDE_FLAG */
 		exclude_query = Xapian::Query (Xapian::Query::OP_AND,
 					   exclude_query, final_query);
 
@@ -259,7 +341,7 @@ notmuch_query_search_messages (notmuch_query_t *query)
 	case NOTMUCH_SORT_MESSAGE_ID:
 	    enquire.set_sort_by_value (NOTMUCH_VALUE_MESSAGE_ID, FALSE);
 	    break;
-        case NOTMUCH_SORT_UNSORTED:
+	case NOTMUCH_SORT_UNSORTED:
 	    break;
 	}
 
@@ -277,15 +359,20 @@ 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",
+			       error.get_msg().c_str());
+	_notmuch_database_log_append (notmuch,
+			       "Query string was: %s\n",
+			       query->query_string);
+
 	notmuch->exception_reported = TRUE;
 	talloc_free (messages);
-	return NULL;
+	return NOTMUCH_STATUS_XAPIAN_EXCEPTION;
     }
 }
 
@@ -391,7 +478,7 @@ _notmuch_doc_id_set_contains (notmuch_doc_id_set_t *doc_ids,
 
 void
 _notmuch_doc_id_set_remove (notmuch_doc_id_set_t *doc_ids,
-                            unsigned int doc_id)
+			    unsigned int doc_id)
 {
     if (doc_id < doc_ids->bound)
 	doc_ids->bitmap[DOCIDSET_WORD(doc_id)] &= ~(1 << DOCIDSET_BIT(doc_id));
@@ -410,24 +497,39 @@ _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));
@@ -443,10 +545,11 @@ 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
@@ -460,6 +563,9 @@ 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);
@@ -503,39 +609,52 @@ notmuch_threads_destroy (notmuch_threads_t *threads)
     talloc_free (threads);
 }
 
-unsigned
+unsigned int
 notmuch_query_count_messages (notmuch_query_t *query)
+{
+    notmuch_status_t status;
+    unsigned int count;
+
+    status = notmuch_query_count_messages_st (query, &count);
+    return status ? 0 : count;
+}
+
+notmuch_status_t
+notmuch_query_count_messages_st (notmuch_query_t *query, unsigned *count_out)
+{
+    return _notmuch_query_count_documents (query, "mail", count_out);
+}
+
+notmuch_status_t
+_notmuch_query_count_documents (notmuch_query_t *query, const char *type, unsigned *count_out)
 {
     notmuch_database_t *notmuch = query->notmuch;
     const char *query_string = query->query_string;
     Xapian::doccount count = 0;
+    notmuch_status_t status;
+
+    status = _notmuch_query_ensure_parsed (query);
+    if (status)
+	return status;
 
     try {
 	Xapian::Enquire enquire (*notmuch->xapian_db);
 	Xapian::Query mail_query (talloc_asprintf (query, "%s%s",
 						   _find_prefix ("type"),
-						   "mail"));
-	Xapian::Query string_query, final_query, exclude_query;
+						   type));
+	Xapian::Query final_query, exclude_query;
 	Xapian::MSet mset;
-	unsigned int flags = (Xapian::QueryParser::FLAG_BOOLEAN |
-			      Xapian::QueryParser::FLAG_PHRASE |
-			      Xapian::QueryParser::FLAG_LOVEHATE |
-			      Xapian::QueryParser::FLAG_BOOLEAN_ANY_CASE |
-			      Xapian::QueryParser::FLAG_WILDCARD |
-			      Xapian::QueryParser::FLAG_PURE_NOT);
 
 	if (strcmp (query_string, "") == 0 ||
 	    strcmp (query_string, "*") == 0)
 	{
 	    final_query = mail_query;
 	} else {
-	    string_query = notmuch->query_parser->
-		parse_query (query_string, flags);
 	    final_query = Xapian::Query (Xapian::Query::OP_AND,
-					 mail_query, string_query);
+					 mail_query, query->xapian_query);
 	}
 
-	exclude_query = _notmuch_exclude_tags (query, final_query);
+	exclude_query = _notmuch_exclude_tags (query);
 
 	final_query = Xapian::Query (Xapian::Query::OP_AND_NOT,
 					 final_query, exclude_query);
@@ -552,38 +671,61 @@ 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.
+	 * Set the max parameter to 0 to avoid fetching documents we will discard.
+	 */
+	mset = enquire.get_mset (0, 0,
+				 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",
+			       error.get_msg().c_str());
+	_notmuch_database_log_append (notmuch,
+				      "Query string was: %s\n",
+				      query->query_string);
+	return NOTMUCH_STATUS_XAPIAN_EXCEPTION;
     }
 
-    return count;
+    *count_out = count;
+    return NOTMUCH_STATUS_SUCCESS;
 }
 
 unsigned
 notmuch_query_count_threads (notmuch_query_t *query)
+{
+    notmuch_status_t status;
+    unsigned int count;
+
+    status = notmuch_query_count_threads_st (query, &count);
+    return status ? 0 : count;
+}
+
+notmuch_status_t
+notmuch_query_count_threads_st (notmuch_query_t *query, unsigned *count)
 {
     notmuch_messages_t *messages;
     GHashTable *hash;
-    unsigned int count;
     notmuch_sort_t sort;
+    notmuch_status_t ret = NOTMUCH_STATUS_SUCCESS;
 
     sort = query->sort;
     query->sort = NOTMUCH_SORT_UNSORTED;
-    messages = notmuch_query_search_messages (query);
+    ret = notmuch_query_search_messages_st (query, &messages);
+    if (ret)
+	return ret;
     query->sort = sort;
     if (messages == NULL)
-	return 0;
+	return NOTMUCH_STATUS_XAPIAN_EXCEPTION;
 
     hash = g_hash_table_new_full (g_str_hash, g_str_equal, NULL, NULL);
     if (hash == NULL) {
 	talloc_free (messages);
-	return 0;
+	return NOTMUCH_STATUS_OUT_OF_MEMORY;
     }
 
     while (notmuch_messages_valid (messages)) {
@@ -592,7 +734,7 @@ notmuch_query_count_threads (notmuch_query_t *query)
 	char *thread_id_copy = talloc_strdup (messages, thread_id);
 	if (unlikely (thread_id_copy == NULL)) {
 	    notmuch_message_destroy (message);
-	    count = 0;
+	    ret = NOTMUCH_STATUS_OUT_OF_MEMORY;
 	    goto DONE;
 	}
 	g_hash_table_insert (hash, thread_id_copy, NULL);
@@ -600,11 +742,17 @@ notmuch_query_count_threads (notmuch_query_t *query)
 	notmuch_messages_move_to_next (messages);
     }
 
-    count = g_hash_table_size (hash);
+    *count = g_hash_table_size (hash);
 
   DONE:
     g_hash_table_unref (hash);
     talloc_free (messages);
 
-    return count;
+    return ret;
+}
+
+notmuch_database_t *
+notmuch_query_get_database (const notmuch_query_t *query)
+{
+    return query->notmuch;
 }