X-Git-Url: https://git.notmuchmail.org/git?p=notmuch;a=blobdiff_plain;f=lib%2Fquery.cc;h=c155470afd82128b37a512af892c08b86a1df3a2;hp=2c8d167255bb903a5224d6d5b7ba0408e108bd00;hb=e04e72f9dd9b435f37cf9e712d9e23cf22896e27;hpb=45b1856782beca246cd2670ea6b122b0c9e06fc0

diff --git a/lib/query.cc b/lib/query.cc
index 2c8d1672..c155470a 100644
--- a/lib/query.cc
+++ b/lib/query.cc
@@ -23,8 +23,6 @@
 
 #include <glib.h> /* GHashTable, GPtrArray */
 
-#include <xapian.h>
-
 struct _notmuch_query {
     notmuch_database_t *notmuch;
     const char *query_string;
@@ -38,13 +36,24 @@ typedef struct _notmuch_mset_messages {
     Xapian::MSetIterator iterator_end;
 } notmuch_mset_messages_t;
 
+struct _notmuch_doc_id_set {
+    unsigned int *bitmap;
+    unsigned int bound;
+};
+
+#define DOCIDSET_WORD(bit) ((bit) / sizeof (unsigned int))
+#define DOCIDSET_BIT(bit) ((bit) % sizeof (unsigned int))
+
 struct _notmuch_threads {
     notmuch_query_t *query;
-    GHashTable *threads;
-    notmuch_messages_t *messages;
 
-    /* This thread ID is our iterator state. */
-    const char *thread_id;
+    /* The ordered list of doc ids matched by the query. */
+    GArray *doc_ids;
+    /* Our iterator's current position in doc_ids. */
+    unsigned int doc_id_pos;
+    /* The set of matched docid's that have not been assigned to a
+     * thread. Initially, this contains every docid in doc_ids. */
+    notmuch_doc_id_set_t match_set;
 };
 
 notmuch_query_t *
@@ -70,12 +79,24 @@ notmuch_query_create (notmuch_database_t *notmuch,
     return query;
 }
 
+const char *
+notmuch_query_get_query_string (notmuch_query_t *query)
+{
+    return query->query_string;
+}
+
 void
 notmuch_query_set_sort (notmuch_query_t *query, notmuch_sort_t sort)
 {
     query->sort = sort;
 }
 
+notmuch_sort_t
+notmuch_query_get_sort (notmuch_query_t *query)
+{
+    return query->sort;
+}
+
 /* We end up having to call the destructors explicitly because we had
  * to use "placement new" in order to initialize C++ objects within a
  * block that we allocated with talloc. So C++ is making talloc
@@ -125,7 +146,9 @@ notmuch_query_search_messages (notmuch_query_t *query)
 			      Xapian::QueryParser::FLAG_WILDCARD |
 			      Xapian::QueryParser::FLAG_PURE_NOT);
 
-	if (strcmp (query_string, "") == 0) {
+	if (strcmp (query_string, "") == 0 ||
+	    strcmp (query_string, "*") == 0)
+	{
 	    final_query = mail_query;
 	} else {
 	    string_query = notmuch->query_parser->
@@ -146,6 +169,8 @@ 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:
+	    break;
 	}
 
 #if DEBUG_QUERY
@@ -159,18 +184,20 @@ notmuch_query_search_messages (notmuch_query_t *query)
 	messages->iterator = mset.begin ();
 	messages->iterator_end = mset.end ();
 
+	return &messages->base;
+
     } 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->exception_reported = TRUE;
+	talloc_free (messages);
+	return NULL;
     }
-
-    return &messages->base;
 }
 
 notmuch_bool_t
-_notmuch_mset_messages_has_more (notmuch_messages_t *messages)
+_notmuch_mset_messages_valid (notmuch_messages_t *messages)
 {
     notmuch_mset_messages_t *mset_messages;
 
@@ -179,6 +206,19 @@ _notmuch_mset_messages_has_more (notmuch_messages_t *messages)
     return (mset_messages->iterator != mset_messages->iterator_end);
 }
 
+static Xapian::docid
+_notmuch_mset_messages_get_doc_id (notmuch_messages_t *messages)
+{
+    notmuch_mset_messages_t *mset_messages;
+
+    mset_messages = (notmuch_mset_messages_t *) messages;
+
+    if (! _notmuch_mset_messages_valid (&mset_messages->base))
+	return 0;
+
+    return *mset_messages->iterator;
+}
+
 notmuch_message_t *
 _notmuch_mset_messages_get (notmuch_messages_t *messages)
 {
@@ -189,7 +229,7 @@ _notmuch_mset_messages_get (notmuch_messages_t *messages)
 
     mset_messages = (notmuch_mset_messages_t *) messages;
 
-    if (! _notmuch_mset_messages_has_more (&mset_messages->base))
+    if (! _notmuch_mset_messages_valid (&mset_messages->base))
 	return NULL;
 
     doc_id = *mset_messages->iterator;
@@ -208,7 +248,7 @@ _notmuch_mset_messages_get (notmuch_messages_t *messages)
 }
 
 void
-_notmuch_mset_messages_advance (notmuch_messages_t *messages)
+_notmuch_mset_messages_move_to_next (notmuch_messages_t *messages)
 {
     notmuch_mset_messages_t *mset_messages;
 
@@ -217,6 +257,46 @@ _notmuch_mset_messages_advance (notmuch_messages_t *messages)
     mset_messages->iterator++;
 }
 
+static notmuch_bool_t
+_notmuch_doc_id_set_init (void *ctx,
+			  notmuch_doc_id_set_t *doc_ids,
+			  GArray *arr, unsigned int bound)
+{
+    size_t count = (bound + sizeof (doc_ids->bitmap[0]) - 1) /
+	sizeof (doc_ids->bitmap[0]);
+    unsigned int *bitmap = talloc_zero_array (ctx, unsigned int, count);
+
+    if (bitmap == NULL)
+	return FALSE;
+
+    doc_ids->bitmap = bitmap;
+    doc_ids->bound = bound;
+
+    for (unsigned int i = 0; i < arr->len; i++) {
+	unsigned int doc_id = g_array_index (arr, unsigned int, i);
+	bitmap[DOCIDSET_WORD(doc_id)] |= 1 << DOCIDSET_BIT(doc_id);
+    }
+
+    return TRUE;
+}
+
+notmuch_bool_t
+_notmuch_doc_id_set_contains (notmuch_doc_id_set_t *doc_ids,
+			      unsigned int doc_id)
+{
+    if (doc_id >= doc_ids->bound)
+	return FALSE;
+    return doc_ids->bitmap[DOCIDSET_WORD(doc_id)] & (1 << DOCIDSET_BIT(doc_id));
+}
+
+void
+_notmuch_doc_id_set_remove (notmuch_doc_id_set_t *doc_ids,
+                            unsigned int doc_id)
+{
+    if (doc_id < doc_ids->bound)
+	doc_ids->bitmap[DOCIDSET_WORD(doc_id)] &= ~(1 << DOCIDSET_BIT(doc_id));
+}
+
 /* Glib objects force use to use a talloc destructor as well, (but not
  * nearly as ugly as the for messages due to C++ objects). At
  * this point, I'd really like to have some talloc-friendly
@@ -224,7 +304,8 @@ _notmuch_mset_messages_advance (notmuch_messages_t *messages)
 static int
 _notmuch_threads_destructor (notmuch_threads_t *threads)
 {
-    g_hash_table_unref (threads->threads);
+    if (threads->doc_ids)
+	g_array_unref (threads->doc_ids);
 
     return 0;
 }
@@ -233,20 +314,39 @@ notmuch_threads_t *
 notmuch_query_search_threads (notmuch_query_t *query)
 {
     notmuch_threads_t *threads;
+    notmuch_messages_t *messages;
+    Xapian::docid max_doc_id = 0;
 
     threads = talloc (query, notmuch_threads_t);
     if (threads == NULL)
 	return NULL;
+    threads->doc_ids = NULL;
+    talloc_set_destructor (threads, _notmuch_threads_destructor);
 
     threads->query = query;
-    threads->threads = g_hash_table_new_full (g_str_hash, g_str_equal,
-					      free, NULL);
 
-    threads->messages = notmuch_query_search_messages (query);
+    messages = notmuch_query_search_messages (query);
+    if (messages == NULL) {
+	    talloc_free (threads);
+	    return NULL;
+    }
 
-    threads->thread_id = NULL;
+    threads->doc_ids = g_array_new (FALSE, FALSE, sizeof (unsigned int));
+    while (notmuch_messages_valid (messages)) {
+	unsigned int doc_id = _notmuch_mset_messages_get_doc_id (messages);
+	g_array_append_val (threads->doc_ids, doc_id);
+	max_doc_id = MAX (max_doc_id, doc_id);
+	notmuch_messages_move_to_next (messages);
+    }
+    threads->doc_id_pos = 0;
 
-    talloc_set_destructor (threads, _notmuch_threads_destructor);
+    talloc_free (messages);
+
+    if (! _notmuch_doc_id_set_init (threads, &threads->match_set,
+				    threads->doc_ids, max_doc_id + 1)) {
+	talloc_free (threads);
+	return NULL;
+    }
 
     return threads;
 }
@@ -258,52 +358,43 @@ notmuch_query_destroy (notmuch_query_t *query)
 }
 
 notmuch_bool_t
-notmuch_threads_has_more (notmuch_threads_t *threads)
+notmuch_threads_valid (notmuch_threads_t *threads)
 {
-    notmuch_message_t *message;
-
-    if (threads->thread_id)
-	return TRUE;
-
-    while (notmuch_messages_has_more (threads->messages))
-    {
-	message = notmuch_messages_get (threads->messages);
-
-	threads->thread_id = notmuch_message_get_thread_id (message);
+    unsigned int doc_id;
 
-	if (! g_hash_table_lookup_extended (threads->threads,
-					    threads->thread_id,
-					    NULL, NULL))
-	{
-	    g_hash_table_insert (threads->threads,
-				 xstrdup (threads->thread_id), NULL);
-	    notmuch_messages_advance (threads->messages);
-	    return TRUE;
-	}
+    while (threads->doc_id_pos < threads->doc_ids->len) {
+	doc_id = g_array_index (threads->doc_ids, unsigned int,
+				threads->doc_id_pos);
+	if (_notmuch_doc_id_set_contains (&threads->match_set, doc_id))
+	    break;
 
-	notmuch_messages_advance (threads->messages);
+	threads->doc_id_pos++;
     }
 
-    threads->thread_id = NULL;
-    return FALSE;
+    return threads->doc_id_pos < threads->doc_ids->len;
 }
 
 notmuch_thread_t *
 notmuch_threads_get (notmuch_threads_t *threads)
 {
-    if (! notmuch_threads_has_more (threads))
+    unsigned int doc_id;
+
+    if (! notmuch_threads_valid (threads))
 	return NULL;
 
+    doc_id = g_array_index (threads->doc_ids, unsigned int,
+			    threads->doc_id_pos);
     return _notmuch_thread_create (threads->query,
 				   threads->query->notmuch,
-				   threads->thread_id,
-				   threads->query->query_string);
+				   doc_id,
+				   &threads->match_set,
+				   threads->query->sort);
 }
 
 void
-notmuch_threads_advance (notmuch_threads_t *threads)
+notmuch_threads_move_to_next (notmuch_threads_t *threads)
 {
-    threads->thread_id = NULL;
+    threads->doc_id_pos++;
 }
 
 void
@@ -333,7 +424,9 @@ notmuch_query_count_messages (notmuch_query_t *query)
 			      Xapian::QueryParser::FLAG_WILDCARD |
 			      Xapian::QueryParser::FLAG_PURE_NOT);
 
-	if (strcmp (query_string, "") == 0) {
+	if (strcmp (query_string, "") == 0 ||
+	    strcmp (query_string, "*") == 0)
+	{
 	    final_query = mail_query;
 	} else {
 	    string_query = notmuch->query_parser->