Gecko [ unitednationsplay.com ]

Name	Size	Permission	Date
hash	[ DIR ]	drwxrwxr-x	2022-08-30 11:49
ArrayHelpers.js	1.45 KB	-rw-rw-r--	2022-08-30 11:49
ArrayQueue.js	2.15 KB	-rw-rw-r--	2022-08-30 11:49
AsyncQueue.js	9.41 KB	-rw-rw-r--	2022-08-30 11:49
Hash.js	925 B	-rw-rw-r--	2022-08-30 11:49
IterableHelpers.js	962 B	-rw-rw-r--	2022-08-30 11:49
LazyBucketSortedSet.js	5.6 KB	-rw-rw-r--	2022-08-30 11:49
LazySet.js	4.46 KB	-rw-rw-r--	2022-08-30 11:49
MapHelpers.js	472 B	-rw-rw-r--	2022-08-30 11:49
ParallelismFactorCalculator.js	1.49 KB	-rw-rw-r--	2022-08-30 11:49
Queue.js	1.02 KB	-rw-rw-r--	2022-08-30 11:49
Semaphore.js	1008 B	-rw-rw-r--	2022-08-30 11:49
SetHelpers.js	2.26 KB	-rw-rw-r--	2022-08-30 11:49
SortableSet.js	3.55 KB	-rw-rw-r--	2022-08-30 11:49
StackedCacheMap.js	2.23 KB	-rw-rw-r--	2022-08-30 11:49
StackedMap.js	3.37 KB	-rw-rw-r--	2022-08-30 11:49
StringXor.js	1.09 KB	-rw-rw-r--	2022-08-30 11:49
TupleQueue.js	1.29 KB	-rw-rw-r--	2022-08-30 11:49
TupleSet.js	2.84 KB	-rw-rw-r--	2022-08-30 11:49
URLAbsoluteSpecifier.js	2.49 KB	-rw-rw-r--	2022-08-30 11:49
WeakTupleMap.js	3.36 KB	-rw-rw-r--	2022-08-30 11:49
binarySearchBounds.js	1.86 KB	-rw-rw-r--	2022-08-30 11:49
cleverMerge.js	16.15 KB	-rw-rw-r--	2022-08-30 11:49
comparators.js	12.15 KB	-rw-rw-r--	2022-08-30 11:49
compileBooleanMatcher.js	5.68 KB	-rw-rw-r--	2022-08-30 11:49
create-schema-validation.js	711 B	-rw-rw-r--	2022-08-30 11:49
createHash.js	4.71 KB	-rw-rw-r--	2022-08-30 11:49
deprecation.js	6.3 KB	-rw-rw-r--	2022-08-30 11:49
deterministicGrouping.js	13.44 KB	-rw-rw-r--	2022-08-30 11:49
extractUrlAndGlobal.js	531 B	-rw-rw-r--	2022-08-30 11:49
findGraphRoots.js	5.97 KB	-rw-rw-r--	2022-08-30 11:49
fs.js	11.15 KB	-rw-rw-r--	2022-08-30 11:49
identifier.js	10.79 KB	-rw-rw-r--	2022-08-30 11:49
internalSerializables.js	10.4 KB	-rw-rw-r--	2022-08-30 11:49
makeSerializable.js	640 B	-rw-rw-r--	2022-08-30 11:49
memoize.js	604 B	-rw-rw-r--	2022-08-30 11:49
nonNumericOnlyHash.js	556 B	-rw-rw-r--	2022-08-30 11:49
numberHash.js	1.04 KB	-rw-rw-r--	2022-08-30 11:49
objectToMap.js	346 B	-rw-rw-r--	2022-08-30 11:49
processAsyncTree.js	1.45 KB	-rw-rw-r--	2022-08-30 11:49
propertyAccess.js	1.16 KB	-rw-rw-r--	2022-08-30 11:49
registerExternalSerializer.js	7.73 KB	-rw-rw-r--	2022-08-30 11:49
runtime.js	14.26 KB	-rw-rw-r--	2022-08-30 11:49
semver.js	15.36 KB	-rw-rw-r--	2022-08-30 11:49
serialization.js	3.92 KB	-rw-rw-r--	2022-08-30 11:49
smartGrouping.js	5.15 KB	-rw-rw-r--	2022-08-30 11:49
source.js	1.72 KB	-rw-rw-r--	2022-08-30 11:49

Rename

/*
	MIT License http://www.opensource.org/licenses/mit-license.php
	Author Tobias Koppers @sokra
*/

"use strict";

const Hash = require("./Hash");

const BULK_SIZE = 2000;

// We are using an object instead of a Map as this will stay static during the runtime
// so access to it can be optimized by v8
const digestCaches = {};

class BulkUpdateDecorator extends Hash {
	/**
	 * @param {Hash | function(): Hash} hashOrFactory function to create a hash
	 * @param {string=} hashKey key for caching
	 */
	constructor(hashOrFactory, hashKey) {
		super();
		this.hashKey = hashKey;
		if (typeof hashOrFactory === "function") {
			this.hashFactory = hashOrFactory;
			this.hash = undefined;
		} else {
			this.hashFactory = undefined;
			this.hash = hashOrFactory;
		}
		this.buffer = "";
	}

/**
	 * Update hash {@link https://nodejs.org/api/crypto.html#crypto_hash_update_data_inputencoding}
	 * @param {string|Buffer} data data
	 * @param {string=} inputEncoding data encoding
	 * @returns {this} updated hash
	 */
	update(data, inputEncoding) {
		if (
			inputEncoding !== undefined ||
			typeof data !== "string" ||
			data.length > BULK_SIZE
		) {
			if (this.hash === undefined) this.hash = this.hashFactory();
			if (this.buffer.length > 0) {
				this.hash.update(this.buffer);
				this.buffer = "";
			}
			this.hash.update(data, inputEncoding);
		} else {
			this.buffer += data;
			if (this.buffer.length > BULK_SIZE) {
				if (this.hash === undefined) this.hash = this.hashFactory();
				this.hash.update(this.buffer);
				this.buffer = "";
			}
		}
		return this;
	}

/**
	 * Calculates the digest {@link https://nodejs.org/api/crypto.html#crypto_hash_digest_encoding}
	 * @param {string=} encoding encoding of the return value
	 * @returns {string|Buffer} digest
	 */
	digest(encoding) {
		let digestCache;
		const buffer = this.buffer;
		if (this.hash === undefined) {
			// short data for hash, we can use caching
			const cacheKey = `${this.hashKey}-${encoding}`;
			digestCache = digestCaches[cacheKey];
			if (digestCache === undefined) {
				digestCache = digestCaches[cacheKey] = new Map();
			}
			const cacheEntry = digestCache.get(buffer);
			if (cacheEntry !== undefined) return cacheEntry;
			this.hash = this.hashFactory();
		}
		if (buffer.length > 0) {
			this.hash.update(buffer);
		}
		const digestResult = this.hash.digest(encoding);
		const result =
			typeof digestResult === "string" ? digestResult : digestResult.toString();
		if (digestCache !== undefined) {
			digestCache.set(buffer, result);
		}
		return result;
	}
}

/* istanbul ignore next */
class DebugHash extends Hash {
	constructor() {
		super();
		this.string = "";
	}

let crypto = undefined;
let createXXHash64 = undefined;
let createMd4 = undefined;
let BatchedHash = undefined;

/**
 * Creates a hash by name or function
 * @param {string | typeof Hash} algorithm the algorithm name or a constructor creating a hash
 * @returns {Hash} the hash
 */
module.exports = algorithm => {
	if (typeof algorithm === "function") {
		return new BulkUpdateDecorator(() => new algorithm());
	}
	switch (algorithm) {
		// TODO add non-cryptographic algorithm here
		case "debug":
			return new DebugHash();
		case "xxhash64":
			if (createXXHash64 === undefined) {
				createXXHash64 = require("./hash/xxhash64");
				if (BatchedHash === undefined) {
					BatchedHash = require("./hash/BatchedHash");
				}
			}
			return new BatchedHash(createXXHash64());
		case "md4":
			if (createMd4 === undefined) {
				createMd4 = require("./hash/md4");
				if (BatchedHash === undefined) {
					BatchedHash = require("./hash/BatchedHash");
				}
			}
			return new BatchedHash(createMd4());
		case "native-md4":
			if (crypto === undefined) crypto = require("crypto");
			return new BulkUpdateDecorator(() => crypto.createHash("md4"), "md4");
		default:
			if (crypto === undefined) crypto = require("crypto");
			return new BulkUpdateDecorator(
				() => crypto.createHash(algorithm),
				algorithm
			);
	}
};