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node_modules/webpack/lib/util/hash/BatchedHash.js

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+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+
+"use strict";
+
+const Hash = require("../Hash");
+const { digest, update } = require("./hash-digest");
+/** @type {number} */
+const MAX_SHORT_STRING = require("./wasm-hash").MAX_SHORT_STRING;
+
+/** @typedef {import("../../../declarations/WebpackOptions").HashDigest} Encoding */
+
+class BatchedHash extends Hash {
+	/**
+	 * @param {Hash} hash hash
+	 */
+	constructor(hash) {
+		super();
+		/** @type {undefined | string} */
+		this.string = undefined;
+		/** @type {undefined | Encoding} */
+		this.encoding = undefined;
+		/** @type {Hash} */
+		this.hash = hash;
+	}
+
+	/**
+	 * Update hash {@link https://nodejs.org/api/crypto.html#crypto_hash_update_data_inputencoding}
+	 * @overload
+	 * @param {string | Buffer} data data
+	 * @returns {Hash} updated hash
+	 */
+	/**
+	 * Update hash {@link https://nodejs.org/api/crypto.html#crypto_hash_update_data_inputencoding}
+	 * @overload
+	 * @param {string} data data
+	 * @param {Encoding} inputEncoding data encoding
+	 * @returns {Hash} updated hash
+	 */
+	/**
+	 * Update hash {@link https://nodejs.org/api/crypto.html#crypto_hash_update_data_inputencoding}
+	 * @param {string | Buffer} data data
+	 * @param {Encoding=} inputEncoding data encoding
+	 * @returns {Hash} updated hash
+	 */
+	update(data, inputEncoding) {
+		if (this.string !== undefined) {
+			if (
+				typeof data === "string" &&
+				inputEncoding === this.encoding &&
+				this.string.length + data.length < MAX_SHORT_STRING
+			) {
+				this.string += data;
+				return this;
+			}
+			if (this.encoding) {
+				update(this.hash, this.string, this.encoding);
+			} else {
+				update(this.hash, this.string);
+			}
+			this.string = undefined;
+		}
+		if (typeof data === "string") {
+			if (
+				data.length < MAX_SHORT_STRING &&
+				// base64 encoding is not valid since it may contain padding chars
+				(!inputEncoding || !inputEncoding.startsWith("ba"))
+			) {
+				this.string = data;
+				this.encoding = inputEncoding;
+			} else if (inputEncoding) {
+				update(this.hash, data, inputEncoding);
+			} else {
+				update(this.hash, data);
+			}
+		} else {
+			update(this.hash, data);
+		}
+		return this;
+	}
+
+	/**
+	 * Calculates the digest {@link https://nodejs.org/api/crypto.html#crypto_hash_digest_encoding}
+	 * @overload
+	 * @returns {Buffer} digest
+	 */
+	/**
+	 * Calculates the digest {@link https://nodejs.org/api/crypto.html#crypto_hash_digest_encoding}
+	 * @overload
+	 * @param {Encoding} encoding encoding of the return value
+	 * @returns {string} digest
+	 */
+	/**
+	 * Calculates the digest {@link https://nodejs.org/api/crypto.html#crypto_hash_digest_encoding}
+	 * @param {Encoding=} encoding encoding of the return value
+	 * @returns {string | Buffer} digest
+	 */
+	digest(encoding) {
+		if (this.string !== undefined) {
+			if (this.encoding) {
+				update(this.hash, this.string, this.encoding);
+			} else {
+				update(this.hash, this.string);
+			}
+		}
+		if (!encoding) {
+			return digest(this.hash);
+		}
+		return digest(this.hash, encoding);
+	}
+}
+
+module.exports = BatchedHash;