[vte] [ring] Swap rows instead of moving

[Behdad Esfahbod <behdad src gnome org>]

commit 5a2879bcc28c703b4e120f57d750d47b7b27a8f4
Author: Behdad Esfahbod <behdad behdad org>
Date:   Thu Aug 27 00:14:16 2009 -0400

    [ring] Swap rows instead of moving
    
    Avoids lots of free/new's

 src/ring.c |   17 ++++++-----------
 1 files changed, 6 insertions(+), 11 deletions(-)
---
diff --git a/src/ring.c b/src/ring.c
index 5c49dc0..9285a26 100644
--- a/src/ring.c
+++ b/src/ring.c
@@ -45,20 +45,15 @@ _vte_row_data_fini (VteRowData *row)
 }
 
 static void
-_vte_row_data_clear (VteRowData *row)
-{
-	row->_cells = NULL;
-}
-
-static void
-_vte_ring_move (VteRing *ring, unsigned int to, unsigned int from)
+_vte_ring_swap (VteRing *ring, unsigned int to, unsigned int from)
 {
+	VteRowData tmp;
 	VteRowData *to_row = _vte_ring_index(ring, to);
 	VteRowData *from_row = _vte_ring_index(ring, from);
 
-	_vte_row_data_fini (to_row);
+	tmp = *to_row;
 	*to_row = *from_row;
-	_vte_row_data_clear (from_row);
+	*from_row = tmp;
 }
 
 
@@ -185,7 +180,7 @@ _vte_ring_insert_internal (VteRing * ring, long position)
 	_vte_ring_validate(ring);
 
 	for (i = ring->delta + ring->length; i > position; i--)
-		_vte_ring_move (ring, i % ring->max, (i - 1) % ring->max);
+		_vte_ring_swap (ring, i % ring->max, (i - 1) % ring->max);
 
 	row = _vte_row_data_init(_vte_ring_index(ring, position));
 	if (ring->length < ring->max)
@@ -250,7 +245,7 @@ _vte_ring_remove (VteRing * ring, long position)
 	_vte_ring_validate(ring);
 
 	for (i = position; i < ring->delta + ring->length - 1; i++)
-		_vte_ring_move (ring, i % ring->max, (i + 1) % ring->max);
+		_vte_ring_swap (ring, i % ring->max, (i + 1) % ring->max);
 
 	if (ring->length > 0)
 		ring->length--;