Module 744784

function(e){function t(){}function n(e){this._tree=e,this._ancestors=[],this._cursor=null}t.prototype.clear=function(){this._root=null,this.size=0},t.prototype.find=function(e){for(var t=this._root;null!==t;){var n=this._comparator(e,t.data);if(0===n)return t.data;t=t.get_child(n>0)}return null},t.prototype.findIter=function(e){for(var t=this._root,n=this.iterator();null!==t;){var r=this._comparator(e,t.data);if(0===r)return n._cursor=t,n;n._ancestors.push(t),t=t.get_child(r>0)}return null},t.prototype.lowerBound=function(e){for(var t=this._root,n=this.iterator(),r=this._comparator;null!==t;){var i=r(e,t.data);if(0===i)return n._cursor=t,n;n._ancestors.push(t),t=t.get_child(i>0)}for(var a=n._ancestors.length-1;a>=0;--a)if(0>r(e,(t=n._ancestors[a]).data))return n._cursor=t,n._ancestors.length=a,n;return n._ancestors.length=0,n},t.prototype.upperBound=function(e){for(var t=this.lowerBound(e),n=this._comparator;null!==t.data()&&0===n(t.data(),e);)t.next();return t},t.prototype.min=function(){var e=this._root;if(null===e)return null;for(;null!==e.left;)e=e.left;return e.data},t.prototype.max=function(){var e=this._root;if(null===e)return null;for(;null!==e.right;)e=e.right;return e.data},t.prototype.iterator=function(){return new n(this)},t.prototype.each=function(e){for(var t,n=this.iterator();null!==(t=n.next());)e(t)},t.prototype.reach=function(e){for(var t,n=this.iterator();null!==(t=n.prev());)e(t)},n.prototype.data=function(){return null!==this._cursor?this._cursor.data:null},n.prototype.next=function(){if(null===this._cursor){var e,t=this._tree._root;null!==t&&this._minNode(t)}else if(null===this._cursor.right)do if(e=this._cursor,this._ancestors.length)this._cursor=this._ancestors.pop();else{this._cursor=null;break}while(this._cursor.right===e);else this._ancestors.push(this._cursor),this._minNode(this._cursor.right);return null!==this._cursor?this._cursor.data:null},n.prototype.prev=function(){if(null===this._cursor){var e,t=this._tree._root;null!==t&&this._maxNode(t)}else if(null===this._cursor.left)do if(e=this._cursor,this._ancestors.length)this._cursor=this._ancestors.pop();else{this._cursor=null;break}while(this._cursor.left===e);else this._ancestors.push(this._cursor),this._maxNode(this._cursor.left);return null!==this._cursor?this._cursor.data:null},n.prototype._minNode=function(e){for(;null!==e.left;)this._ancestors.push(e),e=e.left;this._cursor=e},n.prototype._maxNode=function(e){for(;null!==e.right;)this._ancestors.push(e),e=e.right;this._cursor=e},e.exports=t}