diff options
Diffstat (limited to 'src/corelib/tools/qlinkedlist.h')
-rw-r--r-- | src/corelib/tools/qlinkedlist.h | 44 |
1 files changed, 29 insertions, 15 deletions
diff --git a/src/corelib/tools/qlinkedlist.h b/src/corelib/tools/qlinkedlist.h index 6a85386..79311bc 100644 --- a/src/corelib/tools/qlinkedlist.h +++ b/src/corelib/tools/qlinkedlist.h @@ -265,15 +265,22 @@ void QLinkedList<T>::detach_helper() x.d->ref = 1; x.d->size = d->size; x.d->sharable = true; - Node *i = e->n, *j = x.e; - while (i != e) { - j->n = new Node(i->t); - j->n->p = j; - i = i->n; - j = j->n; + Node *original = e->n; + Node *copy = x.e; + while (original != e) { + QT_TRY { + copy->n = new Node(original->t); + copy->n->p = copy; + original = original->n; + copy = copy->n; + } QT_CATCH(...) { + copy->n = x.e; + free(x.d); + QT_RETHROW; + } } - j->n = x.e; - x.e->p = j; + copy->n = x.e; + x.e->p = copy; if (!d->ref.deref()) free(d); d = x.d; @@ -474,14 +481,21 @@ QLinkedList<T> &QLinkedList<T>::operator+=(const QLinkedList<T> &l) detach(); int n = l.d->size; d->size += n; - Node *o = l.e->n; + Node *original = l.e->n; while (n--) { - Node *i = new Node(o->t); - o = o->n; - i->n = e; - i->p = e->p; - i->p->n = i; - e->p = i; + QT_TRY { + Node *copy = new Node(original->t); + original = original->n; + copy->n = e; + copy->p = e->p; + copy->p->n = copy; + e->p = copy; + } QT_CATCH(...) { + // restore the original list + while (n++<d->size) + removeLast(); + QT_RETHROW; + } } return *this; } |