void playlist_append_entries(struct playlist *pl, struct playlist *source_pl)
{
while (source_pl->first) {
struct playlist_entry *e = source_pl->first;
playlist_unlink(source_pl, e);
playlist_add(pl, e);
}
}
// Moves entry such that entry->prev = at (even if at is NULL)
void playlist_move(struct playlist *pl, struct playlist_entry *entry,
struct playlist_entry *at)
{
struct playlist_entry *save_current = pl->current;
bool save_replaced = pl->current_was_replaced;
playlist_unlink(pl, entry);
playlist_insert(pl, at ? at->prev : pl->last, entry);
pl->current = save_current;
pl->current_was_replaced = save_replaced;
}
// Move all entries from source_pl to pl, appending them after the current entry
// of pl. source_pl will be empty, and all entries have changed ownership to pl.
void playlist_transfer_entries(struct playlist *pl, struct playlist *source_pl)
{
struct playlist_entry *add_after = pl->current;
if (pl->current && pl->current_was_replaced)
add_after = pl->current->next;
if (!add_after)
add_after = pl->last;
while (source_pl->first) {
struct playlist_entry *e = source_pl->first;
playlist_unlink(source_pl, e);
playlist_insert(pl, add_after, e);
}
}
void playlist_shuffle(struct playlist *pl)
{
struct playlist_entry *save_current = pl->current;
bool save_replaced = pl->current_was_replaced;
int count = playlist_count(pl);
struct playlist_entry **arr = talloc_array(NULL, struct playlist_entry *,
count);
for (int n = 0; n < count; n++) {
arr[n] = pl->first;
playlist_unlink(pl, pl->first);
}
for (int n = 0; n < count; n++) {
int other = (int)((double)(count) * rand() / (RAND_MAX + 1.0));
struct playlist_entry *tmp = arr[n];
arr[n] = arr[other];
arr[other] = tmp;
}
for (int n = 0; n < count; n++)
playlist_add(pl, arr[n]);
talloc_free(arr);
pl->current = save_current;
pl->current_was_replaced = save_replaced;
}
void playlist_remove(struct playlist *pl, struct playlist_entry *entry)
{
playlist_unlink(pl, entry);
entry->removed = true;
playlist_entry_unref(entry);
}
void playlist_remove(struct playlist *pl, struct playlist_entry *entry)
{
playlist_unlink(pl, entry);
talloc_free(entry);
}
