X-Git-Url: https://git.distorted.org.uk/~mdw/disorder/blobdiff_plain/4363757e38e4625de8a49cc3cbd8f04aa51a4167..91c9324af56bd50592e818fd4763e6cdcea68857:/lib/trackdb.c

diff --git a/lib/trackdb.c b/lib/trackdb.c
index 5bf2fed..ce00d1a 100644
--- a/lib/trackdb.c
+++ b/lib/trackdb.c
@@ -441,6 +441,9 @@ void trackdb_open(int flags) {
     trackdb_existing_database = 0;
   }
   /* open the databases */
+  if(!(trackdb_usersdb = open_db("users.db",
+                                 0, DB_HASH, dbflags, 0600)))
+    fatal(0, "cannot open users.db");
   trackdb_tracksdb = open_db("tracks.db",
                              DB_RECNUM, DB_BTREE, dbflags, 0666);
   trackdb_searchdb = open_db("search.db",
@@ -451,8 +454,6 @@ void trackdb_open(int flags) {
   trackdb_globaldb = open_db("global.db", 0, DB_HASH, dbflags, 0666);
   trackdb_noticeddb = open_db("noticed.db",
                              DB_DUPSORT, DB_BTREE, dbflags, 0666);
-  trackdb_usersdb = open_db("users.db",
-                            0, DB_HASH, dbflags, 0600);
   if(!trackdb_existing_database) {
     /* Stash the database version */
     char buf[32];
@@ -838,7 +839,7 @@ static int tagchar(int c) {
 }
 
 /* Parse and de-dupe a tag list.  If S=0 then assumes "". */
-static char **parsetags(const char *s) {
+char **parsetags(const char *s) {
   const char *t;
   struct vector v;
 
@@ -1576,7 +1577,7 @@ int trackdb_listkeys(DB *db, struct vector *v, DB_TXN *tid) {
 }
 
 /* return 1 iff sorted tag lists A and B have at least one member in common */
-static int tag_intersection(char **a, char **b) {
+int tag_intersection(char **a, char **b) {
   int cmp;
 
   /* Same sort of logic as trackdb_set() above */
@@ -2090,15 +2091,16 @@ char **trackdb_search(char **wordlist, int nwordlist, int *ntracks) {
 int trackdb_scan(const char *root,
                  int (*callback)(const char *track,
                                  struct kvp *data,
+                                 struct kvp *prefs,
                                  void *u,
                                  DB_TXN *tid),
                  void *u,
                  DB_TXN *tid) {
   DBC *cursor;
-  DBT k, d;
+  DBT k, d, pd;
   const size_t root_len = root ? strlen(root) : 0;
   int err, cberr;
-  struct kvp *data;
+  struct kvp *data, *prefs;
   const char *track;
 
   cursor = trackdb_opencursor(trackdb_tracksdb, tid);
@@ -2118,10 +2120,33 @@ int trackdb_scan(const char *root,
       data = kvp_urldecode(d.data, d.size);
       if(kvp_get(data, "_path")) {
         track = xstrndup(k.data, k.size);
+        /* TODO: trackdb_prefsdb is currently a DB_HASH.  This means we have to
+         * do a lookup for every single track.  In fact this is quite quick:
+         * with around 10,000 tracks a complete scan is around 0.3s on my
+         * 2.2GHz Athlon.  However, if it were a DB_BTREE, we could do the same
+         * linear walk as we already do over trackdb_tracksdb, and probably get
+         * even higher performance.  That would require upgrade logic to
+         * translate old databases though.
+         */
+        switch(err = trackdb_prefsdb->get(trackdb_prefsdb, tid, &k,
+                                          prepare_data(&pd), 0)) {
+        case 0:
+          prefs = kvp_urldecode(pd.data, pd.size);
+          break;
+        case DB_NOTFOUND:
+          prefs = 0;
+          break;
+        case DB_LOCK_DEADLOCK:
+          error(0, "getting prefs: %s", db_strerror(err));
+          trackdb_closecursor(cursor);
+          return err;
+        default:
+          fatal(0, "getting prefs: %s", db_strerror(err));
+        }
         /* Advance to the next track before the callback so that the callback
          * may safely delete the track */
         err = cursor->c_get(cursor, &k, &d, DB_NEXT);
-        if((cberr = callback(track, data, u, tid))) {
+        if((cberr = callback(track, data, prefs, u, tid))) {
           err = cberr;
           break;
         }
@@ -2166,9 +2191,9 @@ static int reap_rescan(ev_source attribute((unused)) *ev,
 
 /** @brief Initiate a rescan
  * @param ev Event loop or 0 to block
- * @param check 1 to recheck lengths, 0 to suppress check
+ * @param recheck 1 to recheck lengths, 0 to suppress check
  */
-void trackdb_rescan(ev_source *ev, int check) {
+void trackdb_rescan(ev_source *ev, int recheck) {
   int w;
 
   if(rescan_pid != -1) {
@@ -2176,7 +2201,7 @@ void trackdb_rescan(ev_source *ev, int check) {
     return;
   }
   rescan_pid = subprogram(ev, -1, RESCAN,
-                          check ? "--check" : "--no-check",
+                          recheck ? "--check" : "--no-check",
                           (char *)0);
   if(ev) {
     ev_child(ev, rescan_pid, 0, reap_rescan, 0);