mirror of
https://github.com/xuxiaobo-bobo/boda_jsEnv.git
synced 2025-04-22 23:44:23 +08:00
400 lines
13 KiB
JavaScript
400 lines
13 KiB
JavaScript
/*!
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* MIT License
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*
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* Copyright (c) 2017-2022 Peculiar Ventures, LLC
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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*/
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'use strict';
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const ARRAY_BUFFER_NAME = "[object ArrayBuffer]";
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class BufferSourceConverter {
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static isArrayBuffer(data) {
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return Object.prototype.toString.call(data) === ARRAY_BUFFER_NAME;
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}
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static toArrayBuffer(data) {
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if (this.isArrayBuffer(data)) {
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return data;
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}
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if (data.byteLength === data.buffer.byteLength) {
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return data.buffer;
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}
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if (data.byteOffset === 0 && data.byteLength === data.buffer.byteLength) {
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return data.buffer;
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}
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return this.toUint8Array(data.buffer)
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.slice(data.byteOffset, data.byteOffset + data.byteLength)
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.buffer;
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}
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static toUint8Array(data) {
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return this.toView(data, Uint8Array);
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}
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static toView(data, type) {
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if (data.constructor === type) {
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return data;
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}
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if (this.isArrayBuffer(data)) {
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return new type(data);
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}
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if (this.isArrayBufferView(data)) {
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return new type(data.buffer, data.byteOffset, data.byteLength);
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}
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throw new TypeError("The provided value is not of type '(ArrayBuffer or ArrayBufferView)'");
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}
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static isBufferSource(data) {
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return this.isArrayBufferView(data)
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|| this.isArrayBuffer(data);
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}
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static isArrayBufferView(data) {
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return ArrayBuffer.isView(data)
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|| (data && this.isArrayBuffer(data.buffer));
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}
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static isEqual(a, b) {
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const aView = BufferSourceConverter.toUint8Array(a);
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const bView = BufferSourceConverter.toUint8Array(b);
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if (aView.length !== bView.byteLength) {
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return false;
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}
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for (let i = 0; i < aView.length; i++) {
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if (aView[i] !== bView[i]) {
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return false;
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}
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}
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return true;
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}
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static concat(...args) {
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let buffers;
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if (Array.isArray(args[0]) && !(args[1] instanceof Function)) {
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buffers = args[0];
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}
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else if (Array.isArray(args[0]) && args[1] instanceof Function) {
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buffers = args[0];
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}
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else {
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if (args[args.length - 1] instanceof Function) {
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buffers = args.slice(0, args.length - 1);
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}
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else {
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buffers = args;
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}
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}
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let size = 0;
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for (const buffer of buffers) {
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size += buffer.byteLength;
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}
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const res = new Uint8Array(size);
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let offset = 0;
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for (const buffer of buffers) {
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const view = this.toUint8Array(buffer);
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res.set(view, offset);
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offset += view.length;
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}
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if (args[args.length - 1] instanceof Function) {
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return this.toView(res, args[args.length - 1]);
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}
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return res.buffer;
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}
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}
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const STRING_TYPE = "string";
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const HEX_REGEX = /^[0-9a-f]+$/i;
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const BASE64_REGEX = /^(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=)?$/;
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const BASE64URL_REGEX = /^[a-zA-Z0-9-_]+$/;
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class Utf8Converter {
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static fromString(text) {
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const s = unescape(encodeURIComponent(text));
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const uintArray = new Uint8Array(s.length);
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for (let i = 0; i < s.length; i++) {
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uintArray[i] = s.charCodeAt(i);
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}
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return uintArray.buffer;
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}
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static toString(buffer) {
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const buf = BufferSourceConverter.toUint8Array(buffer);
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let encodedString = "";
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for (let i = 0; i < buf.length; i++) {
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encodedString += String.fromCharCode(buf[i]);
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}
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const decodedString = decodeURIComponent(escape(encodedString));
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return decodedString;
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}
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}
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class Utf16Converter {
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static toString(buffer, littleEndian = false) {
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const arrayBuffer = BufferSourceConverter.toArrayBuffer(buffer);
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const dataView = new DataView(arrayBuffer);
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let res = "";
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for (let i = 0; i < arrayBuffer.byteLength; i += 2) {
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const code = dataView.getUint16(i, littleEndian);
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res += String.fromCharCode(code);
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}
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return res;
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}
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static fromString(text, littleEndian = false) {
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const res = new ArrayBuffer(text.length * 2);
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const dataView = new DataView(res);
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for (let i = 0; i < text.length; i++) {
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dataView.setUint16(i * 2, text.charCodeAt(i), littleEndian);
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}
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return res;
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}
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}
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class Convert {
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static isHex(data) {
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return typeof data === STRING_TYPE
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&& HEX_REGEX.test(data);
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}
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static isBase64(data) {
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return typeof data === STRING_TYPE
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&& BASE64_REGEX.test(data);
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}
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static isBase64Url(data) {
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return typeof data === STRING_TYPE
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&& BASE64URL_REGEX.test(data);
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}
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static ToString(buffer, enc = "utf8") {
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const buf = BufferSourceConverter.toUint8Array(buffer);
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switch (enc.toLowerCase()) {
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case "utf8":
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return this.ToUtf8String(buf);
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case "binary":
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return this.ToBinary(buf);
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case "hex":
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return this.ToHex(buf);
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case "base64":
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return this.ToBase64(buf);
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case "base64url":
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return this.ToBase64Url(buf);
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case "utf16le":
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return Utf16Converter.toString(buf, true);
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case "utf16":
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case "utf16be":
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return Utf16Converter.toString(buf);
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default:
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throw new Error(`Unknown type of encoding '${enc}'`);
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}
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}
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static FromString(str, enc = "utf8") {
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if (!str) {
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return new ArrayBuffer(0);
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}
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switch (enc.toLowerCase()) {
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case "utf8":
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return this.FromUtf8String(str);
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case "binary":
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return this.FromBinary(str);
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case "hex":
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return this.FromHex(str);
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case "base64":
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return this.FromBase64(str);
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case "base64url":
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return this.FromBase64Url(str);
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case "utf16le":
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return Utf16Converter.fromString(str, true);
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case "utf16":
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case "utf16be":
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return Utf16Converter.fromString(str);
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default:
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throw new Error(`Unknown type of encoding '${enc}'`);
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}
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}
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static ToBase64(buffer) {
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const buf = BufferSourceConverter.toUint8Array(buffer);
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if (typeof btoa !== "undefined") {
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const binary = this.ToString(buf, "binary");
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return btoa(binary);
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}
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else {
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return Buffer.from(buf).toString("base64");
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}
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}
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static FromBase64(base64) {
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const formatted = this.formatString(base64);
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if (!formatted) {
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return new ArrayBuffer(0);
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}
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if (!Convert.isBase64(formatted)) {
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throw new TypeError("Argument 'base64Text' is not Base64 encoded");
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}
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if (typeof atob !== "undefined") {
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return this.FromBinary(atob(formatted));
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}
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else {
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return new Uint8Array(Buffer.from(formatted, "base64")).buffer;
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}
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}
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static FromBase64Url(base64url) {
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const formatted = this.formatString(base64url);
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if (!formatted) {
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return new ArrayBuffer(0);
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}
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if (!Convert.isBase64Url(formatted)) {
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throw new TypeError("Argument 'base64url' is not Base64Url encoded");
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}
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return this.FromBase64(this.Base64Padding(formatted.replace(/\-/g, "+").replace(/\_/g, "/")));
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}
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static ToBase64Url(data) {
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return this.ToBase64(data).replace(/\+/g, "-").replace(/\//g, "_").replace(/\=/g, "");
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}
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static FromUtf8String(text, encoding = Convert.DEFAULT_UTF8_ENCODING) {
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switch (encoding) {
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case "ascii":
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return this.FromBinary(text);
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case "utf8":
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return Utf8Converter.fromString(text);
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case "utf16":
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case "utf16be":
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return Utf16Converter.fromString(text);
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case "utf16le":
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case "usc2":
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return Utf16Converter.fromString(text, true);
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default:
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throw new Error(`Unknown type of encoding '${encoding}'`);
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}
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}
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static ToUtf8String(buffer, encoding = Convert.DEFAULT_UTF8_ENCODING) {
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switch (encoding) {
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case "ascii":
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return this.ToBinary(buffer);
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case "utf8":
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return Utf8Converter.toString(buffer);
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case "utf16":
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case "utf16be":
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return Utf16Converter.toString(buffer);
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case "utf16le":
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case "usc2":
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return Utf16Converter.toString(buffer, true);
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default:
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throw new Error(`Unknown type of encoding '${encoding}'`);
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}
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}
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static FromBinary(text) {
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const stringLength = text.length;
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const resultView = new Uint8Array(stringLength);
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for (let i = 0; i < stringLength; i++) {
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resultView[i] = text.charCodeAt(i);
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}
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return resultView.buffer;
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}
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static ToBinary(buffer) {
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const buf = BufferSourceConverter.toUint8Array(buffer);
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let res = "";
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for (let i = 0; i < buf.length; i++) {
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res += String.fromCharCode(buf[i]);
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}
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return res;
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}
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static ToHex(buffer) {
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const buf = BufferSourceConverter.toUint8Array(buffer);
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let result = "";
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const len = buf.length;
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for (let i = 0; i < len; i++) {
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const byte = buf[i];
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if (byte < 16) {
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result += "0";
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}
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result += byte.toString(16);
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}
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return result;
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}
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static FromHex(hexString) {
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let formatted = this.formatString(hexString);
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if (!formatted) {
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return new ArrayBuffer(0);
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}
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if (!Convert.isHex(formatted)) {
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throw new TypeError("Argument 'hexString' is not HEX encoded");
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}
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if (formatted.length % 2) {
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formatted = `0${formatted}`;
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}
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const res = new Uint8Array(formatted.length / 2);
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for (let i = 0; i < formatted.length; i = i + 2) {
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const c = formatted.slice(i, i + 2);
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res[i / 2] = parseInt(c, 16);
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}
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return res.buffer;
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}
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static ToUtf16String(buffer, littleEndian = false) {
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return Utf16Converter.toString(buffer, littleEndian);
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}
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static FromUtf16String(text, littleEndian = false) {
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return Utf16Converter.fromString(text, littleEndian);
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}
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static Base64Padding(base64) {
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const padCount = 4 - (base64.length % 4);
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if (padCount < 4) {
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for (let i = 0; i < padCount; i++) {
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base64 += "=";
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}
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}
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return base64;
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}
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static formatString(data) {
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return (data === null || data === void 0 ? void 0 : data.replace(/[\n\r\t ]/g, "")) || "";
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}
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}
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Convert.DEFAULT_UTF8_ENCODING = "utf8";
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function assign(target, ...sources) {
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const res = arguments[0];
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for (let i = 1; i < arguments.length; i++) {
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const obj = arguments[i];
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for (const prop in obj) {
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res[prop] = obj[prop];
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}
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}
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return res;
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}
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function combine(...buf) {
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const totalByteLength = buf.map((item) => item.byteLength).reduce((prev, cur) => prev + cur);
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const res = new Uint8Array(totalByteLength);
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let currentPos = 0;
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buf.map((item) => new Uint8Array(item)).forEach((arr) => {
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for (const item2 of arr) {
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res[currentPos++] = item2;
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}
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});
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return res.buffer;
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}
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function isEqual(bytes1, bytes2) {
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if (!(bytes1 && bytes2)) {
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return false;
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}
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if (bytes1.byteLength !== bytes2.byteLength) {
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return false;
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}
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const b1 = new Uint8Array(bytes1);
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const b2 = new Uint8Array(bytes2);
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for (let i = 0; i < bytes1.byteLength; i++) {
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if (b1[i] !== b2[i]) {
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return false;
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}
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}
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return true;
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}
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exports.BufferSourceConverter = BufferSourceConverter;
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exports.Convert = Convert;
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exports.assign = assign;
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exports.combine = combine;
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exports.isEqual = isEqual;
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