mirror of
https://github.com/godotengine/godot
synced 2024-09-16 02:57:32 +00:00
Refactor core/set.h
This commit is contained in:
Cradmon
parent
69017974be
commit
15fa2194a6
245
core/set.h
245
core/set.h
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@ -135,7 +135,6 @@ private:
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#ifdef GLOBALNIL_DISABLED
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memdelete_allocator<Element, A>(_nil);
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#endif
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//memdelete_allocator<Element,A>(_root);
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}
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};
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@ -146,6 +145,7 @@ private:
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ERR_FAIL_COND(p_node == _data._nil && p_color == RED);
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p_node->color = p_color;
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}
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inline void _rotate_left(Element *p_node) {
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Element *r = p_node->right;
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@ -194,8 +194,9 @@ private:
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while (node == node->parent->right) {
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node = node->parent;
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}
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if (node->parent == _data._root)
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return NULL;
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return NULL; // No successor, as p_node is the last node.
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return node->parent;
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}
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}
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@ -213,11 +214,11 @@ private:
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} else {
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while (node == node->parent->left) {
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if (node->parent == _data._root)
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return NULL;
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node = node->parent;
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}
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if (node == _data._root)
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return NULL; // No predecessor, as p_node is the first node.
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return node->parent;
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}
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}
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@ -228,16 +229,15 @@ private:
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C less;
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while (node != _data._nil) {
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if (less(p_value, node->value))
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node = node->left;
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else if (less(node->value, p_value))
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node = node->right;
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else
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break; // found
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return node; // found
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}
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return (node != _data._nil) ? node : NULL;
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return NULL;
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}
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Element *_lower_bound(const T &p_value) const {
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@ -254,21 +254,16 @@ private:
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else if (less(node->value, p_value))
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node = node->right;
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else
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break; // found
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return node; // found
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}
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if (node == _data._nil) {
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if (prev == NULL)
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return NULL;
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if (less(prev->value, p_value)) {
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if (prev == NULL)
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return NULL; // tree empty
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prev = prev->_next;
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}
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if (less(prev->value, p_value))
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prev = prev->_next;
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return prev;
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} else
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return node;
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return prev;
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}
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Element *_insert(const T &p_value, bool &r_exists) {
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@ -291,22 +286,21 @@ private:
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}
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}
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Element *new_node = memnew_allocator(Element, A);
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r_exists = false;
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Element *new_node = memnew_allocator(Element, A);
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new_node->parent = new_parent;
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new_node->right = _data._nil;
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new_node->left = _data._nil;
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new_node->value = p_value;
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//new_node->data=_data;
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if (new_parent == _data._root || less(p_value, new_parent->value)) {
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if (new_parent == _data._root || less(p_value, new_parent->value)) {
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new_parent->left = new_node;
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} else {
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new_parent->right = new_node;
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}
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r_exists = false;
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new_node->_next = _successor(new_node);
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new_node->_prev = _predecessor(new_node);
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if (new_node->_next)
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@ -324,154 +318,159 @@ private:
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if (exists)
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return new_node;
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Element *node = new_node;
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_data.size_cache++;
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Element *node = new_node;
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Element *nparent = node->parent;
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Element *ngrand_parent;
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while (node->parent->color == RED) {
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while (nparent->color == RED) {
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if (node->parent == node->parent->parent->left) {
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ngrand_parent = nparent->parent;
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Element *aux = node->parent->parent->right;
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if (aux->color == RED) {
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_set_color(node->parent, BLACK);
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_set_color(aux, BLACK);
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_set_color(node->parent->parent, RED);
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node = node->parent->parent;
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if (nparent == ngrand_parent->left) {
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if (ngrand_parent->right->color == RED) {
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_set_color(nparent, BLACK);
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_set_color(ngrand_parent->right, BLACK);
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_set_color(ngrand_parent, RED);
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node = ngrand_parent;
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nparent = node->parent;
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} else {
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if (node == node->parent->right) {
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node = node->parent;
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_rotate_left(node);
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if (node == nparent->right) {
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_rotate_left(nparent);
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node = nparent;
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nparent = node->parent;
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}
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_set_color(node->parent, BLACK);
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_set_color(node->parent->parent, RED);
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_rotate_right(node->parent->parent);
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_set_color(nparent, BLACK);
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_set_color(ngrand_parent, RED);
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_rotate_right(ngrand_parent);
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}
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} else {
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Element *aux = node->parent->parent->left;
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if (aux->color == RED) {
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_set_color(node->parent, BLACK);
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_set_color(aux, BLACK);
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_set_color(node->parent->parent, RED);
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node = node->parent->parent;
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if (ngrand_parent->left->color == RED) {
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_set_color(nparent, BLACK);
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_set_color(ngrand_parent->left, BLACK);
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_set_color(ngrand_parent, RED);
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node = ngrand_parent;
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nparent = node->parent;
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} else {
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if (node == node->parent->left) {
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node = node->parent;
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_rotate_right(node);
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if (node == nparent->left) {
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_rotate_right(nparent);
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node = nparent;
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nparent = node->parent;
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}
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_set_color(node->parent, BLACK);
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_set_color(node->parent->parent, RED);
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_rotate_left(node->parent->parent);
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_set_color(nparent, BLACK);
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_set_color(ngrand_parent, RED);
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_rotate_left(ngrand_parent);
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}
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}
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}
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_set_color(_data._root->left, BLACK);
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return new_node;
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}
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void _erase_fix(Element *p_node) {
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Element *root = _data._root->left;
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Element *node = p_node;
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Element *node = _data._nil;
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Element *sibling = p_node;
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Element *parent = sibling->parent;
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while ((node->color == BLACK) && (root != node)) {
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if (node == node->parent->left) {
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Element *aux = node->parent->right;
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if (aux->color == RED) {
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_set_color(aux, BLACK);
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_set_color(node->parent, RED);
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_rotate_left(node->parent);
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aux = node->parent->right;
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}
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if ((aux->right->color == BLACK) && (aux->left->color == BLACK)) {
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_set_color(aux, RED);
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node = node->parent;
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while (node != root) { // If red node found, will exit at a break
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if (sibling->color == RED) {
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_set_color(sibling, BLACK);
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_set_color(parent, RED);
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if (sibling == parent->right) {
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sibling = sibling->left;
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_rotate_left(parent);
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} else {
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if (aux->right->color == BLACK) {
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_set_color(aux->left, BLACK);
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_set_color(aux, RED);
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_rotate_right(aux);
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aux = node->parent->right;
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sibling = sibling->right;
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_rotate_right(parent);
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}
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}
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if ((sibling->left->color == BLACK) && (sibling->right->color == BLACK)) {
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_set_color(sibling, RED);
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if (parent->color == RED) {
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_set_color(parent, BLACK);
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break;
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} else { // loop: haven't found any red nodes yet
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node = parent;
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parent = node->parent;
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sibling = (node == parent->left) ? parent->right : parent->left;
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}
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} else {
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if (sibling == parent->right) {
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if (sibling->right->color == BLACK) {
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_set_color(sibling->left, BLACK);
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_set_color(sibling, RED);
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_rotate_right(sibling);
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sibling = sibling->parent;
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}
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_set_color(aux, node->parent->color);
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_set_color(node->parent, BLACK);
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_set_color(aux->right, BLACK);
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_rotate_left(node->parent);
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node = root; /* this is to exit while loop */
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}
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} else { /* the code below is has left and right switched from above */
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Element *aux = node->parent->left;
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if (aux->color == RED) {
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_set_color(aux, BLACK);
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_set_color(node->parent, RED);
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_rotate_right(node->parent);
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aux = node->parent->left;
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}
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if ((aux->right->color == BLACK) && (aux->left->color == BLACK)) {
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_set_color(aux, RED);
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node = node->parent;
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_set_color(sibling, parent->color);
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_set_color(parent, BLACK);
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_set_color(sibling->right, BLACK);
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_rotate_left(parent);
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break;
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} else {
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if (aux->left->color == BLACK) {
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_set_color(aux->right, BLACK);
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_set_color(aux, RED);
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_rotate_left(aux);
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aux = node->parent->left;
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if (sibling->left->color == BLACK) {
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_set_color(sibling->right, BLACK);
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_set_color(sibling, RED);
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_rotate_left(sibling);
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sibling = sibling->parent;
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}
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_set_color(aux, node->parent->color);
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_set_color(node->parent, BLACK);
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_set_color(aux->left, BLACK);
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_rotate_right(node->parent);
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node = root;
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_set_color(sibling, parent->color);
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_set_color(parent, BLACK);
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_set_color(sibling->left, BLACK);
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_rotate_right(parent);
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break;
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}
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}
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}
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_set_color(node, BLACK);
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ERR_FAIL_COND(_data._nil->color != BLACK);
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}
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void _erase(Element *p_node) {
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Element *rp = ((p_node->left == _data._nil) || (p_node->right == _data._nil)) ? p_node : _successor(p_node);
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if (!rp)
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rp = _data._nil;
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Element *rp = ((p_node->left == _data._nil) || (p_node->right == _data._nil)) ? p_node : p_node->_next;
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Element *node = (rp->left == _data._nil) ? rp->right : rp->left;
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node->parent = rp->parent;
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if (_data._root == node->parent) {
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_data._root->left = node;
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Element *sibling;
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if (rp == rp->parent->left) {
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rp->parent->left = node;
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sibling = rp->parent->right;
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} else {
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if (rp == rp->parent->left) {
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rp->parent->left = node;
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} else {
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rp->parent->right = node;
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}
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rp->parent->right = node;
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sibling = rp->parent->left;
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}
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if (node->color == RED) {
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node->parent = rp->parent;
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_set_color(node, BLACK);
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} else if (rp->color == BLACK && rp->parent != _data._root) {
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_erase_fix(sibling);
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}
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if (rp != p_node) {
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ERR_FAIL_COND(rp == _data._nil);
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if (rp->color == BLACK)
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_erase_fix(node);
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rp->left = p_node->left;
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rp->right = p_node->right;
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rp->parent = p_node->parent;
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rp->color = p_node->color;
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p_node->left->parent = rp;
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p_node->right->parent = rp;
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if (p_node->left != _data._nil)
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p_node->left->parent = rp;
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if (p_node->right != _data._nil)
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p_node->right->parent = rp;
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if (p_node == p_node->parent->left) {
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p_node->parent->left = rp;
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} else {
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p_node->parent->right = rp;
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}
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} else {
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if (p_node->color == BLACK)
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_erase_fix(node);
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}
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if (p_node->_next)
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@ -529,6 +528,7 @@ public:
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if (!_data._root)
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return NULL;
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Element *res = _find(p_value);
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return res;
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}
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@ -549,8 +549,9 @@ public:
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void erase(Element *p_element) {
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if (!_data._root)
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if (!_data._root || !p_element)
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return;
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_erase(p_element);
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if (_data.size_cache == 0 && _data._root)
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_data._free_root();
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@ -560,9 +561,11 @@ public:
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if (!_data._root)
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return false;
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Element *e = find(p_value);
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if (!e)
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return false;
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_erase(e);
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if (_data.size_cache == 0 && _data._root)
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_data._free_root();
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@ -573,6 +576,7 @@ public:
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if (!_data._root)
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return NULL;
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Element *e = _data._root->left;
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if (e == _data._nil)
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return NULL;
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@ -587,6 +591,7 @@ public:
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if (!_data._root)
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return NULL;
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Element *e = _data._root->left;
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if (e == _data._nil)
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return NULL;
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@ -603,10 +608,12 @@ public:
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}
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inline int size() const { return _data.size_cache; }
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int calculate_depth() const {
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// used for debug mostly
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if (!_data._root)
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return 0;
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int max_d = 0;
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_calculate_depth(_data._root->left, max_d, 0);
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return max_d;
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@ -620,7 +627,6 @@ public:
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_cleanup_tree(_data._root->left);
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_data._root->left = _data._nil;
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_data.size_cache = 0;
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_data._nil->parent = _data._nil;
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_data._free_root();
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}
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@ -633,6 +639,7 @@ public:
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_copy_from(p_set);
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}
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_FORCE_INLINE_ Set() {
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}
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