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gsequence: Add seq_is_end()

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This avoids calling is_end() when the
GSequence is already determined, thus
avoids having to walk the tree.

https://bugzilla.gnome.org/show_bug.cgi?id=749583
This commit is contained in:
Garrett Regier 2016-05-09 12:31:57 +03:00 committed by Philip Withnall
parent ee8f7be3df
commit 6aa19a26cf
1 changed files with 14 additions and 4 deletions
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18
glib/gsequence.c
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@ -175,6 +175,13 @@ get_sequence (GSequenceNode *node)
return (GSequence *)node_get_last (node)->data;
}
static gboolean
seq_is_end (GSequence *seq,
GSequenceIter *iter)
{
return seq->end_node == iter;
}
static gboolean
is_end (GSequenceIter *iter)
{
@ -533,9 +540,10 @@ g_sequence_remove (GSequenceIter *iter)
GSequence *seq;
g_return_if_fail (iter != NULL);
g_return_if_fail (!is_end (iter));
seq = get_sequence (iter);
g_return_if_fail (!seq_is_end (seq, iter));
check_seq_access (seq);
node_unlink (iter);
@ -748,10 +756,11 @@ g_sequence_sort_changed (GSequenceIter *iter,
GSequence *seq;
SortInfo info;
g_return_if_fail (!is_end (iter));
g_return_if_fail (iter != NULL);
seq = get_sequence (iter);
/* check_seq_access() call is done by g_sequence_sort_changed_iter() */
g_return_if_fail (!seq_is_end (seq, iter));
info.cmp_func = cmp_func;
info.cmp_data = cmp_data;
@ -935,10 +944,11 @@ g_sequence_sort_changed_iter (GSequenceIter *iter,
GSequenceIter *next, *prev;
g_return_if_fail (iter != NULL);
g_return_if_fail (!is_end (iter));
g_return_if_fail (iter_cmp != NULL);
seq = get_sequence (iter);
g_return_if_fail (!seq_is_end (seq, iter));
check_seq_access (seq);
/* If one of the neighbours is equal to iter, then
@ -1220,9 +1230,9 @@ g_sequence_set (GSequenceIter *iter,
GSequence *seq;
g_return_if_fail (iter != NULL);
g_return_if_fail (!is_end (iter));
seq = get_sequence (iter);
g_return_if_fail (!seq_is_end (seq, iter));
/* If @data is identical to iter->data, it is destroyed
* here. This will work right in case of ref-counted objects. Also