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Assign an arbitrary, but consistent, order to nodes that the user function

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Tue Nov 30 17:53:37 2004  Søren Sandmann  <sandmann@redhat.com>

	* gtk/gtksequence.c (node_compare): Assign an arbitrary, but
	consistent, order to nodes that the user function compares as
	equal. Better fix for bug #157670 and a better way to make sorting
	stable.
This commit is contained in:
Søren Sandmann 2004-11-30 22:58:10 +00:00 committed by Søren Sandmann Pedersen
parent 8dcf7d1d8a
commit 0045a92d4b
5 changed files with 47 additions and 28 deletions
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7
ChangeLog
View File

@ -1,3 +1,10 @@
Tue Nov 30 17:53:37 2004 Søren Sandmann <sandmann@redhat.com>
* gtk/gtksequence.c (node_compare): Assign an arbitrary, but
consistent, order to nodes that the user function compares as
equal. Better fix for bug #157670 and a better way to make sorting
stable.
2004-11-30 Hans Breuer <hans@breuer.org>
* gdk/win32/gdkpixmap-win32.c : remove the disputable memset at

7
ChangeLog.pre-2-10
View File

@ -1,3 +1,10 @@
Tue Nov 30 17:53:37 2004 Søren Sandmann <sandmann@redhat.com>
* gtk/gtksequence.c (node_compare): Assign an arbitrary, but
consistent, order to nodes that the user function compares as
equal. Better fix for bug #157670 and a better way to make sorting
stable.
2004-11-30 Hans Breuer <hans@breuer.org>
* gdk/win32/gdkpixmap-win32.c : remove the disputable memset at

7
ChangeLog.pre-2-6
View File

@ -1,3 +1,10 @@
Tue Nov 30 17:53:37 2004 Søren Sandmann <sandmann@redhat.com>
* gtk/gtksequence.c (node_compare): Assign an arbitrary, but
consistent, order to nodes that the user function compares as
equal. Better fix for bug #157670 and a better way to make sorting
stable.
2004-11-30 Hans Breuer <hans@breuer.org>
* gdk/win32/gdkpixmap-win32.c : remove the disputable memset at

7
ChangeLog.pre-2-8
View File

@ -1,3 +1,10 @@
Tue Nov 30 17:53:37 2004 Søren Sandmann <sandmann@redhat.com>
* gtk/gtksequence.c (node_compare): Assign an arbitrary, but
consistent, order to nodes that the user function compares as
equal. Better fix for bug #157670 and a better way to make sorting
stable.
2004-11-30 Hans Breuer <hans@breuer.org>
* gdk/win32/gdkpixmap-win32.c : remove the disputable memset at

47
gtk/gtksequence.c
View File

@ -152,16 +152,30 @@ struct SortInfo {
static gint
node_compare (gconstpointer n1, gconstpointer n2, gpointer data)
{
SortInfo *info = data;
const SortInfo *info = data;
const GtkSequenceNode *node1 = n1;
const GtkSequenceNode *node2 = n2;
gint retval;
if (node1->is_end)
return 1;
if (node2->is_end)
return -1;
retval = (* info->cmp) (node1, node2, info->data);
/* If the nodes are different, but the user-supplied compare function
* compares them equal, then force an arbitrary (but consistent) order
* on them, so that our sorts will be stable
*/
if (retval != 0 || n1 == n2)
return retval;
if (n1 > n2)
return 1;
else if (node2->is_end)
return -1;
else
return (* info->cmp) (node1, node2, info->data);
return -1;
}
void
@ -256,8 +270,7 @@ _gtk_sequence_sort (GtkSequence *seq,
while (_gtk_sequence_get_length (tmp) > 0)
{
GtkSequenceNode *node = _gtk_sequence_get_end_ptr (tmp);
node = _gtk_sequence_node_prev (node);
GtkSequenceNode *node = _gtk_sequence_get_begin_ptr (tmp);
_gtk_sequence_unlink (tmp, node);
_gtk_sequence_node_insert_sorted (seq->node, node, cmp_func, cmp_data);
@ -448,25 +461,6 @@ _gtk_sequence_ptr_move (GtkSequencePtr ptr,
return _gtk_sequence_node_find_by_pos (ptr, new_pos);
}
static gboolean
already_in_place (GtkSequencePtr ptr,
GCompareDataFunc cmp_func,
gpointer data)
{
SortInfo info;
info.cmp = cmp_func;
info.data = data;
if (node_compare (_gtk_sequence_node_prev (ptr), ptr, &info) <= 0 &&
node_compare (_gtk_sequence_node_next (ptr), ptr, &info) >= 0)
{
return TRUE;
}
return FALSE;
}
void
_gtk_sequence_sort_changed (GtkSequencePtr ptr,
GCompareDataFunc cmp_func,
@ -478,9 +472,6 @@ _gtk_sequence_sort_changed (GtkSequencePtr ptr,
g_return_if_fail (ptr != NULL);
g_return_if_fail (!ptr->is_end);
if (already_in_place (ptr, cmp_func, cmp_data))
return;
seq = _gtk_sequence_node_get_sequence (ptr);
_gtk_sequence_unlink (seq, ptr);
_gtk_sequence_node_insert_sorted (seq->node, ptr, cmp_func, cmp_data);