125 lines
3.2 KiB
JavaScript
125 lines
3.2 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.print = exports.remove = exports.insertLeft = exports.insertRight = exports.insert = void 0;
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const printBinary_1 = require("../print/printBinary");
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const stringify = JSON.stringify;
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const insert = (root, n, comparator) => {
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if (!root)
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return (n.b = true), n;
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const key = n.k;
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let curr = root;
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let next = undefined;
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let cmp = 0;
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while ((next = ((cmp = comparator(key, curr.k)) < 0 ? curr.l : curr.r)))
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curr = next;
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return (cmp < 0 ? (0, exports.insertLeft)(root, n, curr) : (0, exports.insertRight)(root, n, curr));
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};
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exports.insert = insert;
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const insertRight = (root, n, p) => {
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const g = p.p;
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p.r = n;
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n.p = p;
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if (p.b || !g)
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return root;
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const top = rRebalance(n, p, g);
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return top.p ? root : top;
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};
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exports.insertRight = insertRight;
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const insertLeft = (root, n, p) => {
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const g = p.p;
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p.l = n;
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n.p = p;
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if (p.b || !g)
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return root;
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const top = lRebalance(n, p, g);
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return top.p ? root : top;
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};
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exports.insertLeft = insertLeft;
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const rRebalance = (n, p, g) => {
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const u = g.l === p ? g.r : g.l;
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const uncleIsBlack = !u || u.b;
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if (uncleIsBlack) {
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const zigzag = g.l === p;
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g.b = false;
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if (zigzag) {
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n.b = true;
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rrRotate(p, n);
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llRotate(g, n);
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return n;
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}
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p.b = true;
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rrRotate(g, p);
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return p;
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}
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return recolor(p, g, u);
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};
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const lRebalance = (n, p, g) => {
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const u = g.l === p ? g.r : g.l;
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const uncleIsBlack = !u || u.b;
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if (uncleIsBlack) {
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const zigzag = g.r === p;
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g.b = false;
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if (zigzag) {
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n.b = true;
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llRotate(p, n);
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rrRotate(g, n);
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return n;
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}
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p.b = true;
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llRotate(g, p);
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return p;
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}
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return recolor(p, g, u);
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};
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const recolor = (p, g, u) => {
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p.b = true;
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g.b = false;
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if (u)
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u.b = true;
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const gg = g.p;
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if (!gg)
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return (g.b = true), g;
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if (gg.b)
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return g;
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const ggg = gg.p;
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if (!ggg)
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return (gg.b = true), gg;
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return gg.l === g ? lRebalance(g, gg, ggg) : rRebalance(g, gg, ggg);
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};
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const llRotate = (n, nl) => {
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const p = n.p;
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const nlr = nl.r;
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nl.p = p;
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nl.r = n;
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n.p = nl;
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n.l = nlr;
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nlr && (nlr.p = n);
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p && (p.l === n ? (p.l = nl) : (p.r = nl));
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};
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const rrRotate = (n, nr) => {
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const p = n.p;
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const nrl = nr.l;
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nr.p = p;
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nr.l = n;
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n.p = nr;
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n.r = nrl;
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nrl && (nrl.p = n);
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p && (p.l === n ? (p.l = nr) : (p.r = nr));
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};
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const remove = (root, n) => {
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throw new Error('Not implemented');
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};
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exports.remove = remove;
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const print = (node, tab = '') => {
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if (!node)
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return '∅';
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const { b, l, r, k, v } = node;
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const content = k !== undefined ? ` { ${stringify(k)} = ${stringify(v)} }` : '';
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const bfFormatted = !b ? ` [red]` : '';
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return (node.constructor.name +
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`${bfFormatted}` +
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content +
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(0, printBinary_1.printBinary)(tab, [l ? (tab) => (0, exports.print)(l, tab) : null, r ? (tab) => (0, exports.print)(r, tab) : null]));
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};
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exports.print = print;
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