static void
_gtk_rbtree_test_dirty (GtkRBTree *tree,
GtkRBNode *node,
gint expected_dirtyness)
{
if (expected_dirtyness)
{
g_assert (GTK_RBNODE_FLAG_SET (node, GTK_RBNODE_COLUMN_INVALID) ||
GTK_RBNODE_FLAG_SET (node, GTK_RBNODE_INVALID) ||
GTK_RBNODE_FLAG_SET (node->left, GTK_RBNODE_DESCENDANTS_INVALID) ||
GTK_RBNODE_FLAG_SET (node->right, GTK_RBNODE_DESCENDANTS_INVALID) ||
(node->children && GTK_RBNODE_FLAG_SET (node->children->root, GTK_RBNODE_DESCENDANTS_INVALID)));
}
else
{
g_assert (! GTK_RBNODE_FLAG_SET (node, GTK_RBNODE_COLUMN_INVALID) &&
! GTK_RBNODE_FLAG_SET (node, GTK_RBNODE_INVALID));
if (!_gtk_rbtree_is_nil (node->left))
g_assert (! GTK_RBNODE_FLAG_SET (node->left, GTK_RBNODE_DESCENDANTS_INVALID));
if (!_gtk_rbtree_is_nil (node->right))
g_assert (! GTK_RBNODE_FLAG_SET (node->right, GTK_RBNODE_DESCENDANTS_INVALID));
if (node->children != NULL)
g_assert (! GTK_RBNODE_FLAG_SET (node->children->root, GTK_RBNODE_DESCENDANTS_INVALID));
}
if (!_gtk_rbtree_is_nil (node->left))
_gtk_rbtree_test_dirty (tree, node->left, GTK_RBNODE_FLAG_SET (node->left, GTK_RBNODE_DESCENDANTS_INVALID));
if (!_gtk_rbtree_is_nil (node->right))
_gtk_rbtree_test_dirty (tree, node->right, GTK_RBNODE_FLAG_SET (node->right, GTK_RBNODE_DESCENDANTS_INVALID));
if (node->children != NULL && !_gtk_rbtree_is_nil (node->children->root))
_gtk_rbtree_test_dirty (node->children, node->children->root, GTK_RBNODE_FLAG_SET (node->children->root, GTK_RBNODE_DESCENDANTS_INVALID));
}
guint
_gtk_rbtree_node_get_index (GtkRBTree *tree,
GtkRBNode *node)
{
GtkRBNode *last;
guint retval;
g_assert (node);
g_assert (node->left);
retval = node->left->total_count;
while (tree && node && !_gtk_rbtree_is_nil (node))
{
last = node;
node = node->parent;
/* Add left branch, plus children, iff we came from the right */
if (node->right == last)
retval += node->total_count - node->right->total_count;
if (_gtk_rbtree_is_nil (node))
{
node = tree->parent_node;
tree = tree->parent_tree;
/* Add the parent node, plus the left branch. */
if (node)
retval += node->left->total_count + 1; /* 1 == GTK_RBNODE_GET_PARITY() */
}
}
return retval;
}
static void
_gtk_rbtree_test_structure_helper (GtkRBTree *tree,
GtkRBNode *node)
{
g_assert (!_gtk_rbtree_is_nil (node));
g_assert (node->left != NULL);
g_assert (node->right != NULL);
g_assert (node->parent != NULL);
if (!_gtk_rbtree_is_nil (node->left))
{
g_assert (node->left->parent == node);
_gtk_rbtree_test_structure_helper (tree, node->left);
}
if (!_gtk_rbtree_is_nil (node->right))
{
g_assert (node->right->parent == node);
_gtk_rbtree_test_structure_helper (tree, node->right);
}
if (node->children != NULL)
{
g_assert (node->children->parent_tree == tree);
g_assert (node->children->parent_node == node);
_gtk_rbtree_test_structure (node->children);
}
}
GtkRBNode *
_gtk_rbtree_prev (GtkRBTree *tree,
GtkRBNode *node)
{
g_return_val_if_fail (tree != NULL, NULL);
g_return_val_if_fail (node != NULL, NULL);
/* Case 1: the node's below us. */
if (!_gtk_rbtree_is_nil (node->left))
{
node = node->left;
while (!_gtk_rbtree_is_nil (node->right))
node = node->right;
return node;
}
/* Case 2: it's an ancestor */
while (!_gtk_rbtree_is_nil (node->parent))
{
if (node->parent->left == node)
node = node->parent;
else
return (node->parent);
}
/* Case 3: There is no next node */
return NULL;
}
static void
gtk_rbtree_print_node (GtkRBTree *tree,
GtkRBNode *node,
gint depth)
{
gint i;
for (i = 0; i < depth; i++)
g_print ("\t");
g_print ("(%p - %s) (Offset %d) (Parity %d) (Validity %d%d%d)\n",
node,
(GTK_RBNODE_GET_COLOR (node) == GTK_RBNODE_BLACK)?"BLACK":" RED ",
node->offset,
node->total_count,
(GTK_RBNODE_FLAG_SET (node, GTK_RBNODE_DESCENDANTS_INVALID))?1:0,
(GTK_RBNODE_FLAG_SET (node, GTK_RBNODE_INVALID))?1:0,
(GTK_RBNODE_FLAG_SET (node, GTK_RBNODE_COLUMN_INVALID))?1:0);
if (node->children != NULL)
{
g_print ("Looking at child.\n");
gtk_rbtree_print_node (node->children, node->children->root, depth + 1);
g_print ("Done looking at child.\n");
}
if (!_gtk_rbtree_is_nil (node->left))
{
gtk_rbtree_print_node (tree, node->left, depth+1);
}
if (!_gtk_rbtree_is_nil (node->right))
{
gtk_rbtree_print_node (tree, node->right, depth+1);
}
}
gint
_gtk_rbtree_node_find_offset (GtkRBTree *tree,
GtkRBNode *node)
{
GtkRBNode *last;
gint retval;
g_assert (node);
g_assert (node->left);
retval = node->left->offset;
while (tree && node && !_gtk_rbtree_is_nil (node))
{
last = node;
node = node->parent;
/* Add left branch, plus children, iff we came from the right */
if (node->right == last)
retval += node->offset - node->right->offset;
if (_gtk_rbtree_is_nil (node))
{
node = tree->parent_node;
tree = tree->parent_tree;
/* Add the parent node, plus the left branch. */
if (node)
retval += node->left->offset + GTK_RBNODE_GET_HEIGHT (node);
}
}
return retval;
}
static void
_gtk_rbtree_debug_spew_helper (GtkRBTree *tree,
GtkRBNode *node,
GString *s,
gint depth)
{
gint i;
for (i = 0; i < depth; i++)
g_string_append (s, "\t");
g_string_append_printf (s, "(%p - %s) (Offset %d) (Parity %d) (Validity %d%d%d)\n",
node,
(GTK_RBNODE_GET_COLOR (node) == GTK_RBNODE_BLACK)?"BLACK":" RED ",
node->offset,
node->total_count,
(GTK_RBNODE_FLAG_SET (node, GTK_RBNODE_DESCENDANTS_INVALID))?1:0,
(GTK_RBNODE_FLAG_SET (node, GTK_RBNODE_INVALID))?1:0,
(GTK_RBNODE_FLAG_SET (node, GTK_RBNODE_COLUMN_INVALID))?1:0);
if (node->children != NULL)
{
g_string_append (s, "Looking at child.\n");
_gtk_rbtree_debug_spew (node->children, s);
g_string_append (s, "Done looking at child.\n");
}
if (!_gtk_rbtree_is_nil (node->left))
{
_gtk_rbtree_debug_spew_helper (tree, node->left, s, depth + 1);
}
if (!_gtk_rbtree_is_nil (node->right))
{
_gtk_rbtree_debug_spew_helper (tree, node->right, s, depth + 1);
}
}
static void
_gtk_rbtree_test_structure (GtkRBTree *tree)
{
g_assert (tree->root);
if (_gtk_rbtree_is_nil (tree->root))
return;
g_assert (_gtk_rbtree_is_nil (tree->root->parent));
_gtk_rbtree_test_structure_helper (tree, tree->root);
}
static void
_gtk_rbnode_rotate_right (GtkRBTree *tree,
GtkRBNode *node)
{
gint node_height, left_height;
GtkRBNode *left;
g_return_if_fail (!_gtk_rbtree_is_nil (node));
g_return_if_fail (!_gtk_rbtree_is_nil (node->left));
left = node->left;
node_height = GTK_RBNODE_GET_HEIGHT (node);
left_height = GTK_RBNODE_GET_HEIGHT (left);
node->left = left->right;
if (!_gtk_rbtree_is_nil (left->right))
left->right->parent = node;
left->parent = node->parent;
if (!_gtk_rbtree_is_nil (node->parent))
{
if (node == node->parent->right)
node->parent->right = left;
else
node->parent->left = left;
}
else
{
tree->root = left;
}
/* link node and left */
left->right = node;
node->parent = left;
node->count = 1 + node->left->count + node->right->count;
left->count = 1 + left->left->count + left->right->count;
node->offset = node_height + node->left->offset + node->right->offset +
(node->children ? node->children->root->offset : 0);
left->offset = left_height + left->left->offset + left->right->offset +
(left->children?left->children->root->offset:0);
_fixup_validation (tree, node);
_fixup_validation (tree, left);
_fixup_total_count (tree, node);
_fixup_total_count (tree, left);
}
gboolean
_gtk_rbtree_find_index (GtkRBTree *tree,
guint index,
GtkRBTree **new_tree,
GtkRBNode **new_node)
{
GtkRBNode *tmp_node;
g_assert (tree);
tmp_node = tree->root;
while (!_gtk_rbtree_is_nil (tmp_node))
{
if (tmp_node->left->total_count > index)
{
tmp_node = tmp_node->left;
}
else if (tmp_node->total_count - tmp_node->right->total_count <= index)
{
index -= tmp_node->total_count - tmp_node->right->total_count;
tmp_node = tmp_node->right;
}
else
{
index -= tmp_node->left->total_count;
break;
}
}
if (_gtk_rbtree_is_nil (tmp_node))
{
*new_tree = NULL;
*new_node = NULL;
return FALSE;
}
if (index > 0)
{
g_assert (tmp_node->children);
return _gtk_rbtree_find_index (tmp_node->children,
index - 1,
new_tree,
new_node);
}
*new_tree = tree;
*new_node = tmp_node;
return TRUE;
}
GtkRBNode *
_gtk_rbtree_first (GtkRBTree *tree)
{
GtkRBNode *node;
node = tree->root;
if (_gtk_rbtree_is_nil (node))
return NULL;
while (!_gtk_rbtree_is_nil (node->left))
node = node->left;
return node;
}
void
_gtk_rbtree_prev_full (GtkRBTree *tree,
GtkRBNode *node,
GtkRBTree **new_tree,
GtkRBNode **new_node)
{
g_return_if_fail (tree != NULL);
g_return_if_fail (node != NULL);
g_return_if_fail (new_tree != NULL);
g_return_if_fail (new_node != NULL);
*new_tree = tree;
*new_node = _gtk_rbtree_prev (tree, node);
if (*new_node == NULL)
{
*new_node = (*new_tree)->parent_node;
*new_tree = (*new_tree)->parent_tree;
}
else
{
while ((*new_node)->children)
{
*new_tree = (*new_node)->children;
*new_node = (*new_tree)->root;
while (!_gtk_rbtree_is_nil ((*new_node)->right))
*new_node = (*new_node)->right;
}
}
}
void
_gtk_rbtree_next_full (GtkRBTree *tree,
GtkRBNode *node,
GtkRBTree **new_tree,
GtkRBNode **new_node)
{
g_return_if_fail (tree != NULL);
g_return_if_fail (node != NULL);
g_return_if_fail (new_tree != NULL);
g_return_if_fail (new_node != NULL);
if (node->children)
{
*new_tree = node->children;
*new_node = (*new_tree)->root;
while (!_gtk_rbtree_is_nil ((*new_node)->left))
*new_node = (*new_node)->left;
return;
}
*new_tree = tree;
*new_node = _gtk_rbtree_next (tree, node);
while ((*new_node == NULL) &&
(*new_tree != NULL))
{
*new_node = (*new_tree)->parent_node;
*new_tree = (*new_tree)->parent_tree;
if (*new_tree)
*new_node = _gtk_rbtree_next (*new_tree, *new_node);
}
}
void
_gtk_rbtree_node_mark_valid (GtkRBTree *tree,
GtkRBNode *node)
{
if ((!GTK_RBNODE_FLAG_SET (node, GTK_RBNODE_INVALID)) &&
(!GTK_RBNODE_FLAG_SET (node, GTK_RBNODE_COLUMN_INVALID)))
return;
GTK_RBNODE_UNSET_FLAG (node, GTK_RBNODE_INVALID);
GTK_RBNODE_UNSET_FLAG (node, GTK_RBNODE_COLUMN_INVALID);
do
{
if ((GTK_RBNODE_FLAG_SET (node, GTK_RBNODE_INVALID)) ||
(GTK_RBNODE_FLAG_SET (node, GTK_RBNODE_COLUMN_INVALID)) ||
(node->children && GTK_RBNODE_FLAG_SET (node->children->root, GTK_RBNODE_DESCENDANTS_INVALID)) ||
(GTK_RBNODE_FLAG_SET (node->left, GTK_RBNODE_DESCENDANTS_INVALID)) ||
(GTK_RBNODE_FLAG_SET (node->right, GTK_RBNODE_DESCENDANTS_INVALID)))
return;
GTK_RBNODE_UNSET_FLAG (node, GTK_RBNODE_DESCENDANTS_INVALID);
node = node->parent;
if (_gtk_rbtree_is_nil (node))
{
node = tree->parent_node;
tree = tree->parent_tree;
}
}
while (node);
}
static void
_gtk_rbtree_test (GtkRBTree *tree)
{
GtkRBTree *tmp_tree;
if (tree == NULL)
return;
/* Test the entire tree */
tmp_tree = tree;
while (tmp_tree->parent_tree)
tmp_tree = tmp_tree->parent_tree;
if (_gtk_rbtree_is_nil (tmp_tree->root))
return;
_gtk_rbtree_test_structure (tmp_tree);
g_assert ((_count_nodes (tmp_tree, tmp_tree->root->left) +
_count_nodes (tmp_tree, tmp_tree->root->right) + 1) == tmp_tree->root->count);
_gtk_rbtree_test_height (tmp_tree, tmp_tree->root);
_gtk_rbtree_test_dirty (tmp_tree, tmp_tree->root, GTK_RBNODE_FLAG_SET (tmp_tree->root, GTK_RBNODE_DESCENDANTS_INVALID));
g_assert (count_total (tmp_tree, tmp_tree->root) == tmp_tree->root->total_count);
}
static void
_gtk_rbnode_rotate_left (GtkRBTree *tree,
GtkRBNode *node)
{
gint node_height, right_height;
GtkRBNode *right;
g_return_if_fail (!_gtk_rbtree_is_nil (node));
g_return_if_fail (!_gtk_rbtree_is_nil (node->right));
right = node->right;
node_height = GTK_RBNODE_GET_HEIGHT (node);
right_height = GTK_RBNODE_GET_HEIGHT (right);
node->right = right->left;
if (!_gtk_rbtree_is_nil (right->left))
right->left->parent = node;
right->parent = node->parent;
if (!_gtk_rbtree_is_nil (node->parent))
{
if (node == node->parent->left)
node->parent->left = right;
else
node->parent->right = right;
} else {
tree->root = right;
}
right->left = node;
node->parent = right;
node->count = 1 + node->left->count + node->right->count;
right->count = 1 + right->left->count + right->right->count;
node->offset = node_height + node->left->offset + node->right->offset +
(node->children ? node->children->root->offset : 0);
right->offset = right_height + right->left->offset + right->right->offset +
(right->children ? right->children->root->offset : 0);
_fixup_validation (tree, node);
_fixup_validation (tree, right);
_fixup_total_count (tree, node);
_fixup_total_count (tree, right);
}
void
gtk_rbtree_print (GtkRBTree *tree)
{
g_return_if_fail (tree != NULL);
if (_gtk_rbtree_is_nil (tree->root))
g_print ("Empty tree...\n");
else
gtk_rbtree_print_node (tree, tree->root, 0);
}
static void
_gtk_rbtree_debug_spew (GtkRBTree *tree)
{
g_return_if_fail (tree != NULL);
if (_gtk_rbtree_is_nil (tree->root))
g_print ("Empty tree...\n");
else
_gtk_rbtree_debug_spew_helper (tree, tree->root, 0);
}
static void
_gtk_rbtree_debug_spew (GtkRBTree *tree, GString *s)
{
g_return_if_fail (tree != NULL);
if (_gtk_rbtree_is_nil (tree->root))
g_string_append (s, "Empty tree...");
else
_gtk_rbtree_debug_spew_helper (tree, tree->root, s, 0);
}
GtkRBNode *
_gtk_rbtree_find_count (GtkRBTree *tree,
gint count)
{
GtkRBNode *node;
node = tree->root;
while (!_gtk_rbtree_is_nil (node) && (node->left->count + 1 != count))
{
if (node->left->count >= count)
node = node->left;
else
{
count -= (node->left->count + 1);
node = node->right;
}
}
if (_gtk_rbtree_is_nil (node))
return NULL;
return node;
}
static void
_gtk_rbtree_test_height (GtkRBTree *tree,
GtkRBNode *node)
{
gint computed_offset = 0;
/* This whole test is sort of a useless truism. */
if (!_gtk_rbtree_is_nil (node->left))
computed_offset += node->left->offset;
if (!_gtk_rbtree_is_nil (node->right))
computed_offset += node->right->offset;
if (node->children && !_gtk_rbtree_is_nil (node->children->root))
computed_offset += node->children->root->offset;
if (GTK_RBNODE_GET_HEIGHT (node) + computed_offset != node->offset)
g_error ("node has broken offset\n");
if (!_gtk_rbtree_is_nil (node->left))
_gtk_rbtree_test_height (tree, node->left);
if (!_gtk_rbtree_is_nil (node->right))
_gtk_rbtree_test_height (tree, node->right);
if (node->children && !_gtk_rbtree_is_nil (node->children->root))
_gtk_rbtree_test_height (node->children, node->children->root);
}
static guint
_gtk_rbtree_test_structure_helper (GtkRBTree *tree,
GtkRBNode *node)
{
guint left_blacks, right_blacks;
g_assert (!_gtk_rbtree_is_nil (node));
g_assert (node->left != NULL);
g_assert (node->right != NULL);
g_assert (node->parent != NULL);
if (!_gtk_rbtree_is_nil (node->left))
{
g_assert (node->left->parent == node);
left_blacks = _gtk_rbtree_test_structure_helper (tree, node->left);
}
else
left_blacks = 0;
if (!_gtk_rbtree_is_nil (node->right))
{
g_assert (node->right->parent == node);
right_blacks = _gtk_rbtree_test_structure_helper (tree, node->right);
}
else
right_blacks = 0;
if (node->children != NULL)
{
g_assert (node->children->parent_tree == tree);
g_assert (node->children->parent_node == node);
_gtk_rbtree_test_structure (node->children);
}
g_assert (left_blacks == right_blacks);
return left_blacks + (GTK_RBNODE_GET_COLOR (node) == GTK_RBNODE_BLACK ? 1 : 0);
}
static void
_gtk_rbtree_traverse_post_order (GtkRBTree *tree,
GtkRBNode *node,
GtkRBTreeTraverseFunc func,
gpointer data)
{
if (_gtk_rbtree_is_nil (node))
return;
_gtk_rbtree_traverse_post_order (tree, node->left, func, data);
_gtk_rbtree_traverse_post_order (tree, node->right, func, data);
(* func) (tree, node, data);
}
static void
gtk_rbnode_adjust (GtkRBTree *tree,
GtkRBNode *node,
int count_diff,
int total_count_diff,
int offset_diff)
{
while (tree && node && !_gtk_rbtree_is_nil (node))
{
_fixup_validation (tree, node);
node->offset += offset_diff;
node->count += count_diff;
node->total_count += total_count_diff;
node = node->parent;
if (_gtk_rbtree_is_nil (node))
{
node = tree->parent_node;
tree = tree->parent_tree;
count_diff = 0;
}
}
}
static void
reorder_copy_node (GtkRBTree *tree,
GtkRBNode *to,
GtkRBNode *from)
{
to->flags = (to->flags & GTK_RBNODE_NON_COLORS) | GTK_RBNODE_GET_COLOR (from);
to->left = from->left;
if (!_gtk_rbtree_is_nil (to->left))
to->left->parent = to;
to->right = from->right;
if (!_gtk_rbtree_is_nil (to->right))
to->right->parent = to;
to->parent = from->parent;
if (_gtk_rbtree_is_nil (to->parent))
tree->root = to;
else if (to->parent->left == from)
to->parent->left = to;
else if (to->parent->right == from)
to->parent->right = to;
}
/* Draconian version. */
void
_gtk_rbtree_node_mark_invalid (GtkRBTree *tree,
GtkRBNode *node)
{
GTK_RBNODE_SET_FLAG (node, GTK_RBNODE_INVALID);
do
{
_fixup_validation (tree, node);
node = node->parent;
if (_gtk_rbtree_is_nil (node))
{
node = tree->parent_node;
tree = tree->parent_tree;
}
}
while (node);
}
static gint
_count_nodes (GtkRBTree *tree,
GtkRBNode *node)
{
gint res;
if (_gtk_rbtree_is_nil (node))
return 0;
g_assert (node->left);
g_assert (node->right);
res = (_count_nodes (tree, node->left) +
_count_nodes (tree, node->right) + 1);
if (res != node->count)
g_print ("Tree failed\n");
return res;
}
void
_gtk_rbtree_node_mark_invalid (GtkRBTree *tree,
GtkRBNode *node)
{
if (GTK_RBNODE_FLAG_SET (node, GTK_RBNODE_INVALID))
return;
GTK_RBNODE_SET_FLAG (node, GTK_RBNODE_INVALID);
do
{
if (GTK_RBNODE_FLAG_SET (node, GTK_RBNODE_DESCENDANTS_INVALID))
return;
GTK_RBNODE_SET_FLAG (node, GTK_RBNODE_DESCENDANTS_INVALID);
node = node->parent;
if (_gtk_rbtree_is_nil (node))
{
node = tree->parent_node;
tree = tree->parent_tree;
}
}
while (node);
}
static guint
count_total (GtkRBTree *tree,
GtkRBNode *node)
{
guint res;
if (_gtk_rbtree_is_nil (node))
return 0;
res =
count_total (tree, node->left) +
count_total (tree, node->right) +
(guint)1 +
(node->children ? count_total (node->children, node->children->root) : 0);
if (res != node->total_count)
g_print ("total count incorrect for node\n");
if (get_total_count (node) != node->total_count)
g_error ("Node has incorrect total count %u, should be %u", node->total_count, get_total_count (node));
return res;
}
static gint
gtk_rbtree_real_find_offset (GtkRBTree *tree,
gint height,
GtkRBTree **new_tree,
GtkRBNode **new_node)
{
GtkRBNode *tmp_node;
g_assert (tree);
if (height < 0)
{
*new_tree = NULL;
*new_node = NULL;
return 0;
}
tmp_node = tree->root;
while (!_gtk_rbtree_is_nil (tmp_node) &&
(tmp_node->left->offset > height ||
(tmp_node->offset - tmp_node->right->offset) < height))
{
if (tmp_node->left->offset > height)
tmp_node = tmp_node->left;
else
{
height -= (tmp_node->offset - tmp_node->right->offset);
tmp_node = tmp_node->right;
}
}
if (_gtk_rbtree_is_nil (tmp_node))
{
*new_tree = NULL;
*new_node = NULL;
return 0;
}
if (tmp_node->children)
{
if ((tmp_node->offset -
tmp_node->right->offset -
tmp_node->children->root->offset) > height)
{
*new_tree = tree;
*new_node = tmp_node;
return (height - tmp_node->left->offset);
}
return gtk_rbtree_real_find_offset (tmp_node->children,
height - tmp_node->left->offset -
(tmp_node->offset -
tmp_node->left->offset -
tmp_node->right->offset -
tmp_node->children->root->offset),
new_tree,
new_node);
}
*new_tree = tree;
*new_node = tmp_node;
return (height - tmp_node->left->offset);
}