X-Git-Url: https://git.distorted.org.uk/~mdw/disorder/blobdiff_plain/33e95f039e696d2cfe6b673166a064e48ed1e341..59cf25c47fbda22f3f4e14399f0436cc6ed2c56f:/lib/trackdb.c?ds=sidebyside

diff --git a/lib/trackdb.c b/lib/trackdb.c
index 08aeac2..8769cca 100644
--- a/lib/trackdb.c
+++ b/lib/trackdb.c
@@ -2,20 +2,18 @@
  * This file is part of DisOrder
  * Copyright (C) 2005-2008 Richard Kettlewell
  *
- * This program is free software; you can redistribute it and/or modify
+ * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
+ * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * 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, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
- * USA
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 /** @file lib/trackdb.c
  * @brief Track database
@@ -509,8 +507,13 @@ void trackdb_close(void) {
 
 /* generic db routines *******************************************************/
 
-/* fetch and decode a database entry.  Returns 0, DB_NOTFOUND or
- * DB_LOCK_DEADLOCK. */
+/** @brief Fetch and decode a database entry
+ * @param db Database
+ * @param track Track name
+ * @param kp Where to put decoded list (or NULL if you don't care)
+ * @param tid Owning transaction
+ * @return 0, @c DB_NOTFOUND or @c DB_LOCK_DEADLOCK
+ */
 int trackdb_getdata(DB *db,
                     const char *track,
                     struct kvp **kp,
@@ -521,10 +524,12 @@ int trackdb_getdata(DB *db,
   switch(err = db->get(db, tid, make_key(&key, track),
                        prepare_data(&data), 0)) {
   case 0:
-    *kp = kvp_urldecode(data.data, data.size);
+    if(kp)
+      *kp = kvp_urldecode(data.data, data.size);
     return 0;
   case DB_NOTFOUND:
-    *kp = 0;
+    if(kp)
+      *kp = 0;
     return err;
   case DB_LOCK_DEADLOCK:
     error(0, "error querying database: %s", db_strerror(err));
@@ -2241,7 +2246,7 @@ static int reap_rescan(ev_source attribute((unused)) *ev,
  * @param ev Event loop or 0 to block
  * @param recheck 1 to recheck lengths, 0 to suppress check
  * @param rescanned Called on completion (if not NULL)
- * @param u Passed to @p rescanned
+ * @param ru Passed to @p rescanned
  */
 void trackdb_rescan(ev_source *ev, int recheck,
                     void (*rescanned)(void *ru),
@@ -2407,9 +2412,6 @@ char **trackdb_new(int *ntracksp,
  * @return null-terminated array of track names, or NULL on deadlock
  *
  * The most recently added track is first in the array.
- *
- * TODO: exclude tracks that have been deleted again.
- *
  */
 static char **trackdb_new_tid(int *ntracksp,
                               int maxtracks,
@@ -2418,12 +2420,24 @@ static char **trackdb_new_tid(int *ntracksp,
   DBT k, d;
   int err = 0;
   struct vector tracks[1];
+  hash *h = hash_new(1);
 
   vector_init(tracks);
   c = trackdb_opencursor(trackdb_noticeddb, tid);
   while((maxtracks <= 0 || tracks->nvec < maxtracks)
-        && !(err = c->c_get(c, prepare_data(&k), prepare_data(&d), DB_PREV)))
-    vector_append(tracks, xstrndup(d.data, d.size));
+        && !(err = c->c_get(c, prepare_data(&k), prepare_data(&d), DB_PREV))) {
+    char *const track = xstrndup(d.data, d.size);
+    /* Don't add any track more than once */
+    if(hash_add(h, track, "", HASH_INSERT))
+      continue;
+    /* See if the track still exists */
+    err = trackdb_getdata(trackdb_tracksdb, track, NULL/*kp*/, tid);
+    if(err == DB_NOTFOUND)
+      continue;                         /* It doesn't, skip it */
+    if(err == DB_LOCK_DEADLOCK)
+      break;                            /* Doh */
+    vector_append(tracks, track);
+  }
   switch(err) {
   case 0:                               /* hit maxtracks */
   case DB_NOTFOUND:                     /* ran out of tracks */