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2806 lines
74 KiB
JavaScript
2806 lines
74 KiB
JavaScript
var Multibase =
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/******/ (function(modules) { // webpackBootstrap
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/******/ // The module cache
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/******/ var installedModules = {};
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/******/
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/******/ // The require function
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/******/ function __webpack_require__(moduleId) {
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/******/
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/******/ // Check if module is in cache
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|
/******/ if(installedModules[moduleId]) {
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/******/ return installedModules[moduleId].exports;
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/******/ }
|
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/******/ // Create a new module (and put it into the cache)
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/******/ var module = installedModules[moduleId] = {
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/******/ i: moduleId,
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/******/ l: false,
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/******/ exports: {}
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/******/ };
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/******/
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/******/ // Execute the module function
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/******/ modules[moduleId].call(module.exports, module, module.exports, __webpack_require__);
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/******/
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/******/ // Flag the module as loaded
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/******/ module.l = true;
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/******/
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/******/ // Return the exports of the module
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/******/ return module.exports;
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/******/ }
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/******/
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/******/
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/******/ // expose the modules object (__webpack_modules__)
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/******/ __webpack_require__.m = modules;
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/******/
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/******/ // expose the module cache
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/******/ __webpack_require__.c = installedModules;
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/******/
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/******/ // define getter function for harmony exports
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/******/ __webpack_require__.d = function(exports, name, getter) {
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/******/ if(!__webpack_require__.o(exports, name)) {
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/******/ Object.defineProperty(exports, name, { enumerable: true, get: getter });
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/******/ }
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/******/ };
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/******/
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/******/ // define __esModule on exports
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/******/ __webpack_require__.r = function(exports) {
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/******/ if(typeof Symbol !== 'undefined' && Symbol.toStringTag) {
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/******/ Object.defineProperty(exports, Symbol.toStringTag, { value: 'Module' });
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/******/ }
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/******/ Object.defineProperty(exports, '__esModule', { value: true });
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/******/ };
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/******/
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/******/ // create a fake namespace object
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/******/ // mode & 1: value is a module id, require it
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/******/ // mode & 2: merge all properties of value into the ns
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/******/ // mode & 4: return value when already ns object
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/******/ // mode & 8|1: behave like require
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/******/ __webpack_require__.t = function(value, mode) {
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/******/ if(mode & 1) value = __webpack_require__(value);
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/******/ if(mode & 8) return value;
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/******/ if((mode & 4) && typeof value === 'object' && value && value.__esModule) return value;
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/******/ var ns = Object.create(null);
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/******/ __webpack_require__.r(ns);
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/******/ Object.defineProperty(ns, 'default', { enumerable: true, value: value });
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/******/ if(mode & 2 && typeof value != 'string') for(var key in value) __webpack_require__.d(ns, key, function(key) { return value[key]; }.bind(null, key));
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/******/ return ns;
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/******/ };
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/******/
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/******/ // getDefaultExport function for compatibility with non-harmony modules
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/******/ __webpack_require__.n = function(module) {
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/******/ var getter = module && module.__esModule ?
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/******/ function getDefault() { return module['default']; } :
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/******/ function getModuleExports() { return module; };
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/******/ __webpack_require__.d(getter, 'a', getter);
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/******/ return getter;
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/******/ };
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/******/
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/******/ // Object.prototype.hasOwnProperty.call
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/******/ __webpack_require__.o = function(object, property) { return Object.prototype.hasOwnProperty.call(object, property); };
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/******/
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/******/ // __webpack_public_path__
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/******/ __webpack_require__.p = "";
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/******/
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/******/
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/******/ // Load entry module and return exports
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/******/ return __webpack_require__(__webpack_require__.s = 0);
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/******/ })
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/************************************************************************/
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/******/ ({
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/***/ "./node_modules/base-x/index.js":
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/*!**************************************!*\
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!*** ./node_modules/base-x/index.js ***!
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\**************************************/
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/*! no static exports found */
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/***/ (function(module, exports, __webpack_require__) {
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// base-x encoding
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// Forked from https://github.com/cryptocoinjs/bs58
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// Originally written by Mike Hearn for BitcoinJ
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// Copyright (c) 2011 Google Inc
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// Ported to JavaScript by Stefan Thomas
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// Merged Buffer refactorings from base58-native by Stephen Pair
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// Copyright (c) 2013 BitPay Inc
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var Buffer = __webpack_require__(/*! safe-buffer */ "./node_modules/safe-buffer/index.js").Buffer
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module.exports = function base (ALPHABET) {
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var ALPHABET_MAP = {}
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var BASE = ALPHABET.length
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var LEADER = ALPHABET.charAt(0)
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// pre-compute lookup table
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for (var z = 0; z < ALPHABET.length; z++) {
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var x = ALPHABET.charAt(z)
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if (ALPHABET_MAP[x] !== undefined) throw new TypeError(x + ' is ambiguous')
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ALPHABET_MAP[x] = z
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}
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function encode (source) {
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if (source.length === 0) return ''
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var digits = [0]
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for (var i = 0; i < source.length; ++i) {
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for (var j = 0, carry = source[i]; j < digits.length; ++j) {
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carry += digits[j] << 8
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digits[j] = carry % BASE
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carry = (carry / BASE) | 0
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}
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while (carry > 0) {
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digits.push(carry % BASE)
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carry = (carry / BASE) | 0
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}
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}
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var string = ''
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// deal with leading zeros
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for (var k = 0; source[k] === 0 && k < source.length - 1; ++k) string += LEADER
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// convert digits to a string
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for (var q = digits.length - 1; q >= 0; --q) string += ALPHABET[digits[q]]
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return string
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}
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function decodeUnsafe (string) {
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if (typeof string !== 'string') throw new TypeError('Expected String')
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if (string.length === 0) return Buffer.allocUnsafe(0)
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var bytes = [0]
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for (var i = 0; i < string.length; i++) {
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var value = ALPHABET_MAP[string[i]]
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if (value === undefined) return
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for (var j = 0, carry = value; j < bytes.length; ++j) {
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carry += bytes[j] * BASE
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bytes[j] = carry & 0xff
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carry >>= 8
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}
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while (carry > 0) {
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bytes.push(carry & 0xff)
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carry >>= 8
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}
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}
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// deal with leading zeros
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for (var k = 0; string[k] === LEADER && k < string.length - 1; ++k) {
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bytes.push(0)
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}
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return Buffer.from(bytes.reverse())
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}
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function decode (string) {
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var buffer = decodeUnsafe(string)
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if (buffer) return buffer
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throw new Error('Non-base' + BASE + ' character')
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}
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return {
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encode: encode,
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decodeUnsafe: decodeUnsafe,
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decode: decode
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}
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}
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/***/ }),
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/***/ "./node_modules/base64-js/index.js":
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/*!*****************************************!*\
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!*** ./node_modules/base64-js/index.js ***!
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\*****************************************/
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/*! no static exports found */
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/***/ (function(module, exports, __webpack_require__) {
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"use strict";
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exports.byteLength = byteLength
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exports.toByteArray = toByteArray
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exports.fromByteArray = fromByteArray
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var lookup = []
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var revLookup = []
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var Arr = typeof Uint8Array !== 'undefined' ? Uint8Array : Array
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var code = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'
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for (var i = 0, len = code.length; i < len; ++i) {
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lookup[i] = code[i]
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revLookup[code.charCodeAt(i)] = i
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}
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// Support decoding URL-safe base64 strings, as Node.js does.
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// See: https://en.wikipedia.org/wiki/Base64#URL_applications
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revLookup['-'.charCodeAt(0)] = 62
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revLookup['_'.charCodeAt(0)] = 63
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function getLens (b64) {
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var len = b64.length
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if (len % 4 > 0) {
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throw new Error('Invalid string. Length must be a multiple of 4')
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}
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// Trim off extra bytes after placeholder bytes are found
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// See: https://github.com/beatgammit/base64-js/issues/42
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var validLen = b64.indexOf('=')
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if (validLen === -1) validLen = len
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var placeHoldersLen = validLen === len
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? 0
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: 4 - (validLen % 4)
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return [validLen, placeHoldersLen]
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}
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|
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// base64 is 4/3 + up to two characters of the original data
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function byteLength (b64) {
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var lens = getLens(b64)
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|
var validLen = lens[0]
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var placeHoldersLen = lens[1]
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return ((validLen + placeHoldersLen) * 3 / 4) - placeHoldersLen
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}
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function _byteLength (b64, validLen, placeHoldersLen) {
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return ((validLen + placeHoldersLen) * 3 / 4) - placeHoldersLen
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}
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function toByteArray (b64) {
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var tmp
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|
var lens = getLens(b64)
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var validLen = lens[0]
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var placeHoldersLen = lens[1]
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var arr = new Arr(_byteLength(b64, validLen, placeHoldersLen))
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var curByte = 0
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|
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// if there are placeholders, only get up to the last complete 4 chars
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var len = placeHoldersLen > 0
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? validLen - 4
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: validLen
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for (var i = 0; i < len; i += 4) {
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tmp =
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(revLookup[b64.charCodeAt(i)] << 18) |
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(revLookup[b64.charCodeAt(i + 1)] << 12) |
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(revLookup[b64.charCodeAt(i + 2)] << 6) |
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revLookup[b64.charCodeAt(i + 3)]
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arr[curByte++] = (tmp >> 16) & 0xFF
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arr[curByte++] = (tmp >> 8) & 0xFF
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arr[curByte++] = tmp & 0xFF
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}
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|
|
if (placeHoldersLen === 2) {
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tmp =
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(revLookup[b64.charCodeAt(i)] << 2) |
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(revLookup[b64.charCodeAt(i + 1)] >> 4)
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arr[curByte++] = tmp & 0xFF
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}
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|
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if (placeHoldersLen === 1) {
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tmp =
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(revLookup[b64.charCodeAt(i)] << 10) |
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(revLookup[b64.charCodeAt(i + 1)] << 4) |
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(revLookup[b64.charCodeAt(i + 2)] >> 2)
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arr[curByte++] = (tmp >> 8) & 0xFF
|
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arr[curByte++] = tmp & 0xFF
|
|
}
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|
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return arr
|
|
}
|
|
|
|
function tripletToBase64 (num) {
|
|
return lookup[num >> 18 & 0x3F] +
|
|
lookup[num >> 12 & 0x3F] +
|
|
lookup[num >> 6 & 0x3F] +
|
|
lookup[num & 0x3F]
|
|
}
|
|
|
|
function encodeChunk (uint8, start, end) {
|
|
var tmp
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|
var output = []
|
|
for (var i = start; i < end; i += 3) {
|
|
tmp =
|
|
((uint8[i] << 16) & 0xFF0000) +
|
|
((uint8[i + 1] << 8) & 0xFF00) +
|
|
(uint8[i + 2] & 0xFF)
|
|
output.push(tripletToBase64(tmp))
|
|
}
|
|
return output.join('')
|
|
}
|
|
|
|
function fromByteArray (uint8) {
|
|
var tmp
|
|
var len = uint8.length
|
|
var extraBytes = len % 3 // if we have 1 byte left, pad 2 bytes
|
|
var parts = []
|
|
var maxChunkLength = 16383 // must be multiple of 3
|
|
|
|
// go through the array every three bytes, we'll deal with trailing stuff later
|
|
for (var i = 0, len2 = len - extraBytes; i < len2; i += maxChunkLength) {
|
|
parts.push(encodeChunk(
|
|
uint8, i, (i + maxChunkLength) > len2 ? len2 : (i + maxChunkLength)
|
|
))
|
|
}
|
|
|
|
// pad the end with zeros, but make sure to not forget the extra bytes
|
|
if (extraBytes === 1) {
|
|
tmp = uint8[len - 1]
|
|
parts.push(
|
|
lookup[tmp >> 2] +
|
|
lookup[(tmp << 4) & 0x3F] +
|
|
'=='
|
|
)
|
|
} else if (extraBytes === 2) {
|
|
tmp = (uint8[len - 2] << 8) + uint8[len - 1]
|
|
parts.push(
|
|
lookup[tmp >> 10] +
|
|
lookup[(tmp >> 4) & 0x3F] +
|
|
lookup[(tmp << 2) & 0x3F] +
|
|
'='
|
|
)
|
|
}
|
|
|
|
return parts.join('')
|
|
}
|
|
|
|
|
|
/***/ }),
|
|
|
|
/***/ "./node_modules/buffer/index.js":
|
|
/*!**************************************!*\
|
|
!*** ./node_modules/buffer/index.js ***!
|
|
\**************************************/
|
|
/*! no static exports found */
|
|
/***/ (function(module, exports, __webpack_require__) {
|
|
|
|
"use strict";
|
|
/* WEBPACK VAR INJECTION */(function(global) {/*!
|
|
* The buffer module from node.js, for the browser.
|
|
*
|
|
* @author Feross Aboukhadijeh <feross@feross.org> <http://feross.org>
|
|
* @license MIT
|
|
*/
|
|
/* eslint-disable no-proto */
|
|
|
|
|
|
|
|
var base64 = __webpack_require__(/*! base64-js */ "./node_modules/base64-js/index.js")
|
|
var ieee754 = __webpack_require__(/*! ieee754 */ "./node_modules/ieee754/index.js")
|
|
var isArray = __webpack_require__(/*! isarray */ "./node_modules/isarray/index.js")
|
|
|
|
exports.Buffer = Buffer
|
|
exports.SlowBuffer = SlowBuffer
|
|
exports.INSPECT_MAX_BYTES = 50
|
|
|
|
/**
|
|
* If `Buffer.TYPED_ARRAY_SUPPORT`:
|
|
* === true Use Uint8Array implementation (fastest)
|
|
* === false Use Object implementation (most compatible, even IE6)
|
|
*
|
|
* Browsers that support typed arrays are IE 10+, Firefox 4+, Chrome 7+, Safari 5.1+,
|
|
* Opera 11.6+, iOS 4.2+.
|
|
*
|
|
* Due to various browser bugs, sometimes the Object implementation will be used even
|
|
* when the browser supports typed arrays.
|
|
*
|
|
* Note:
|
|
*
|
|
* - Firefox 4-29 lacks support for adding new properties to `Uint8Array` instances,
|
|
* See: https://bugzilla.mozilla.org/show_bug.cgi?id=695438.
|
|
*
|
|
* - Chrome 9-10 is missing the `TypedArray.prototype.subarray` function.
|
|
*
|
|
* - IE10 has a broken `TypedArray.prototype.subarray` function which returns arrays of
|
|
* incorrect length in some situations.
|
|
|
|
* We detect these buggy browsers and set `Buffer.TYPED_ARRAY_SUPPORT` to `false` so they
|
|
* get the Object implementation, which is slower but behaves correctly.
|
|
*/
|
|
Buffer.TYPED_ARRAY_SUPPORT = global.TYPED_ARRAY_SUPPORT !== undefined
|
|
? global.TYPED_ARRAY_SUPPORT
|
|
: typedArraySupport()
|
|
|
|
/*
|
|
* Export kMaxLength after typed array support is determined.
|
|
*/
|
|
exports.kMaxLength = kMaxLength()
|
|
|
|
function typedArraySupport () {
|
|
try {
|
|
var arr = new Uint8Array(1)
|
|
arr.__proto__ = {__proto__: Uint8Array.prototype, foo: function () { return 42 }}
|
|
return arr.foo() === 42 && // typed array instances can be augmented
|
|
typeof arr.subarray === 'function' && // chrome 9-10 lack `subarray`
|
|
arr.subarray(1, 1).byteLength === 0 // ie10 has broken `subarray`
|
|
} catch (e) {
|
|
return false
|
|
}
|
|
}
|
|
|
|
function kMaxLength () {
|
|
return Buffer.TYPED_ARRAY_SUPPORT
|
|
? 0x7fffffff
|
|
: 0x3fffffff
|
|
}
|
|
|
|
function createBuffer (that, length) {
|
|
if (kMaxLength() < length) {
|
|
throw new RangeError('Invalid typed array length')
|
|
}
|
|
if (Buffer.TYPED_ARRAY_SUPPORT) {
|
|
// Return an augmented `Uint8Array` instance, for best performance
|
|
that = new Uint8Array(length)
|
|
that.__proto__ = Buffer.prototype
|
|
} else {
|
|
// Fallback: Return an object instance of the Buffer class
|
|
if (that === null) {
|
|
that = new Buffer(length)
|
|
}
|
|
that.length = length
|
|
}
|
|
|
|
return that
|
|
}
|
|
|
|
/**
|
|
* The Buffer constructor returns instances of `Uint8Array` that have their
|
|
* prototype changed to `Buffer.prototype`. Furthermore, `Buffer` is a subclass of
|
|
* `Uint8Array`, so the returned instances will have all the node `Buffer` methods
|
|
* and the `Uint8Array` methods. Square bracket notation works as expected -- it
|
|
* returns a single octet.
|
|
*
|
|
* The `Uint8Array` prototype remains unmodified.
|
|
*/
|
|
|
|
function Buffer (arg, encodingOrOffset, length) {
|
|
if (!Buffer.TYPED_ARRAY_SUPPORT && !(this instanceof Buffer)) {
|
|
return new Buffer(arg, encodingOrOffset, length)
|
|
}
|
|
|
|
// Common case.
|
|
if (typeof arg === 'number') {
|
|
if (typeof encodingOrOffset === 'string') {
|
|
throw new Error(
|
|
'If encoding is specified then the first argument must be a string'
|
|
)
|
|
}
|
|
return allocUnsafe(this, arg)
|
|
}
|
|
return from(this, arg, encodingOrOffset, length)
|
|
}
|
|
|
|
Buffer.poolSize = 8192 // not used by this implementation
|
|
|
|
// TODO: Legacy, not needed anymore. Remove in next major version.
|
|
Buffer._augment = function (arr) {
|
|
arr.__proto__ = Buffer.prototype
|
|
return arr
|
|
}
|
|
|
|
function from (that, value, encodingOrOffset, length) {
|
|
if (typeof value === 'number') {
|
|
throw new TypeError('"value" argument must not be a number')
|
|
}
|
|
|
|
if (typeof ArrayBuffer !== 'undefined' && value instanceof ArrayBuffer) {
|
|
return fromArrayBuffer(that, value, encodingOrOffset, length)
|
|
}
|
|
|
|
if (typeof value === 'string') {
|
|
return fromString(that, value, encodingOrOffset)
|
|
}
|
|
|
|
return fromObject(that, value)
|
|
}
|
|
|
|
/**
|
|
* Functionally equivalent to Buffer(arg, encoding) but throws a TypeError
|
|
* if value is a number.
|
|
* Buffer.from(str[, encoding])
|
|
* Buffer.from(array)
|
|
* Buffer.from(buffer)
|
|
* Buffer.from(arrayBuffer[, byteOffset[, length]])
|
|
**/
|
|
Buffer.from = function (value, encodingOrOffset, length) {
|
|
return from(null, value, encodingOrOffset, length)
|
|
}
|
|
|
|
if (Buffer.TYPED_ARRAY_SUPPORT) {
|
|
Buffer.prototype.__proto__ = Uint8Array.prototype
|
|
Buffer.__proto__ = Uint8Array
|
|
if (typeof Symbol !== 'undefined' && Symbol.species &&
|
|
Buffer[Symbol.species] === Buffer) {
|
|
// Fix subarray() in ES2016. See: https://github.com/feross/buffer/pull/97
|
|
Object.defineProperty(Buffer, Symbol.species, {
|
|
value: null,
|
|
configurable: true
|
|
})
|
|
}
|
|
}
|
|
|
|
function assertSize (size) {
|
|
if (typeof size !== 'number') {
|
|
throw new TypeError('"size" argument must be a number')
|
|
} else if (size < 0) {
|
|
throw new RangeError('"size" argument must not be negative')
|
|
}
|
|
}
|
|
|
|
function alloc (that, size, fill, encoding) {
|
|
assertSize(size)
|
|
if (size <= 0) {
|
|
return createBuffer(that, size)
|
|
}
|
|
if (fill !== undefined) {
|
|
// Only pay attention to encoding if it's a string. This
|
|
// prevents accidentally sending in a number that would
|
|
// be interpretted as a start offset.
|
|
return typeof encoding === 'string'
|
|
? createBuffer(that, size).fill(fill, encoding)
|
|
: createBuffer(that, size).fill(fill)
|
|
}
|
|
return createBuffer(that, size)
|
|
}
|
|
|
|
/**
|
|
* Creates a new filled Buffer instance.
|
|
* alloc(size[, fill[, encoding]])
|
|
**/
|
|
Buffer.alloc = function (size, fill, encoding) {
|
|
return alloc(null, size, fill, encoding)
|
|
}
|
|
|
|
function allocUnsafe (that, size) {
|
|
assertSize(size)
|
|
that = createBuffer(that, size < 0 ? 0 : checked(size) | 0)
|
|
if (!Buffer.TYPED_ARRAY_SUPPORT) {
|
|
for (var i = 0; i < size; ++i) {
|
|
that[i] = 0
|
|
}
|
|
}
|
|
return that
|
|
}
|
|
|
|
/**
|
|
* Equivalent to Buffer(num), by default creates a non-zero-filled Buffer instance.
|
|
* */
|
|
Buffer.allocUnsafe = function (size) {
|
|
return allocUnsafe(null, size)
|
|
}
|
|
/**
|
|
* Equivalent to SlowBuffer(num), by default creates a non-zero-filled Buffer instance.
|
|
*/
|
|
Buffer.allocUnsafeSlow = function (size) {
|
|
return allocUnsafe(null, size)
|
|
}
|
|
|
|
function fromString (that, string, encoding) {
|
|
if (typeof encoding !== 'string' || encoding === '') {
|
|
encoding = 'utf8'
|
|
}
|
|
|
|
if (!Buffer.isEncoding(encoding)) {
|
|
throw new TypeError('"encoding" must be a valid string encoding')
|
|
}
|
|
|
|
var length = byteLength(string, encoding) | 0
|
|
that = createBuffer(that, length)
|
|
|
|
var actual = that.write(string, encoding)
|
|
|
|
if (actual !== length) {
|
|
// Writing a hex string, for example, that contains invalid characters will
|
|
// cause everything after the first invalid character to be ignored. (e.g.
|
|
// 'abxxcd' will be treated as 'ab')
|
|
that = that.slice(0, actual)
|
|
}
|
|
|
|
return that
|
|
}
|
|
|
|
function fromArrayLike (that, array) {
|
|
var length = array.length < 0 ? 0 : checked(array.length) | 0
|
|
that = createBuffer(that, length)
|
|
for (var i = 0; i < length; i += 1) {
|
|
that[i] = array[i] & 255
|
|
}
|
|
return that
|
|
}
|
|
|
|
function fromArrayBuffer (that, array, byteOffset, length) {
|
|
array.byteLength // this throws if `array` is not a valid ArrayBuffer
|
|
|
|
if (byteOffset < 0 || array.byteLength < byteOffset) {
|
|
throw new RangeError('\'offset\' is out of bounds')
|
|
}
|
|
|
|
if (array.byteLength < byteOffset + (length || 0)) {
|
|
throw new RangeError('\'length\' is out of bounds')
|
|
}
|
|
|
|
if (byteOffset === undefined && length === undefined) {
|
|
array = new Uint8Array(array)
|
|
} else if (length === undefined) {
|
|
array = new Uint8Array(array, byteOffset)
|
|
} else {
|
|
array = new Uint8Array(array, byteOffset, length)
|
|
}
|
|
|
|
if (Buffer.TYPED_ARRAY_SUPPORT) {
|
|
// Return an augmented `Uint8Array` instance, for best performance
|
|
that = array
|
|
that.__proto__ = Buffer.prototype
|
|
} else {
|
|
// Fallback: Return an object instance of the Buffer class
|
|
that = fromArrayLike(that, array)
|
|
}
|
|
return that
|
|
}
|
|
|
|
function fromObject (that, obj) {
|
|
if (Buffer.isBuffer(obj)) {
|
|
var len = checked(obj.length) | 0
|
|
that = createBuffer(that, len)
|
|
|
|
if (that.length === 0) {
|
|
return that
|
|
}
|
|
|
|
obj.copy(that, 0, 0, len)
|
|
return that
|
|
}
|
|
|
|
if (obj) {
|
|
if ((typeof ArrayBuffer !== 'undefined' &&
|
|
obj.buffer instanceof ArrayBuffer) || 'length' in obj) {
|
|
if (typeof obj.length !== 'number' || isnan(obj.length)) {
|
|
return createBuffer(that, 0)
|
|
}
|
|
return fromArrayLike(that, obj)
|
|
}
|
|
|
|
if (obj.type === 'Buffer' && isArray(obj.data)) {
|
|
return fromArrayLike(that, obj.data)
|
|
}
|
|
}
|
|
|
|
throw new TypeError('First argument must be a string, Buffer, ArrayBuffer, Array, or array-like object.')
|
|
}
|
|
|
|
function checked (length) {
|
|
// Note: cannot use `length < kMaxLength()` here because that fails when
|
|
// length is NaN (which is otherwise coerced to zero.)
|
|
if (length >= kMaxLength()) {
|
|
throw new RangeError('Attempt to allocate Buffer larger than maximum ' +
|
|
'size: 0x' + kMaxLength().toString(16) + ' bytes')
|
|
}
|
|
return length | 0
|
|
}
|
|
|
|
function SlowBuffer (length) {
|
|
if (+length != length) { // eslint-disable-line eqeqeq
|
|
length = 0
|
|
}
|
|
return Buffer.alloc(+length)
|
|
}
|
|
|
|
Buffer.isBuffer = function isBuffer (b) {
|
|
return !!(b != null && b._isBuffer)
|
|
}
|
|
|
|
Buffer.compare = function compare (a, b) {
|
|
if (!Buffer.isBuffer(a) || !Buffer.isBuffer(b)) {
|
|
throw new TypeError('Arguments must be Buffers')
|
|
}
|
|
|
|
if (a === b) return 0
|
|
|
|
var x = a.length
|
|
var y = b.length
|
|
|
|
for (var i = 0, len = Math.min(x, y); i < len; ++i) {
|
|
if (a[i] !== b[i]) {
|
|
x = a[i]
|
|
y = b[i]
|
|
break
|
|
}
|
|
}
|
|
|
|
if (x < y) return -1
|
|
if (y < x) return 1
|
|
return 0
|
|
}
|
|
|
|
Buffer.isEncoding = function isEncoding (encoding) {
|
|
switch (String(encoding).toLowerCase()) {
|
|
case 'hex':
|
|
case 'utf8':
|
|
case 'utf-8':
|
|
case 'ascii':
|
|
case 'latin1':
|
|
case 'binary':
|
|
case 'base64':
|
|
case 'ucs2':
|
|
case 'ucs-2':
|
|
case 'utf16le':
|
|
case 'utf-16le':
|
|
return true
|
|
default:
|
|
return false
|
|
}
|
|
}
|
|
|
|
Buffer.concat = function concat (list, length) {
|
|
if (!isArray(list)) {
|
|
throw new TypeError('"list" argument must be an Array of Buffers')
|
|
}
|
|
|
|
if (list.length === 0) {
|
|
return Buffer.alloc(0)
|
|
}
|
|
|
|
var i
|
|
if (length === undefined) {
|
|
length = 0
|
|
for (i = 0; i < list.length; ++i) {
|
|
length += list[i].length
|
|
}
|
|
}
|
|
|
|
var buffer = Buffer.allocUnsafe(length)
|
|
var pos = 0
|
|
for (i = 0; i < list.length; ++i) {
|
|
var buf = list[i]
|
|
if (!Buffer.isBuffer(buf)) {
|
|
throw new TypeError('"list" argument must be an Array of Buffers')
|
|
}
|
|
buf.copy(buffer, pos)
|
|
pos += buf.length
|
|
}
|
|
return buffer
|
|
}
|
|
|
|
function byteLength (string, encoding) {
|
|
if (Buffer.isBuffer(string)) {
|
|
return string.length
|
|
}
|
|
if (typeof ArrayBuffer !== 'undefined' && typeof ArrayBuffer.isView === 'function' &&
|
|
(ArrayBuffer.isView(string) || string instanceof ArrayBuffer)) {
|
|
return string.byteLength
|
|
}
|
|
if (typeof string !== 'string') {
|
|
string = '' + string
|
|
}
|
|
|
|
var len = string.length
|
|
if (len === 0) return 0
|
|
|
|
// Use a for loop to avoid recursion
|
|
var loweredCase = false
|
|
for (;;) {
|
|
switch (encoding) {
|
|
case 'ascii':
|
|
case 'latin1':
|
|
case 'binary':
|
|
return len
|
|
case 'utf8':
|
|
case 'utf-8':
|
|
case undefined:
|
|
return utf8ToBytes(string).length
|
|
case 'ucs2':
|
|
case 'ucs-2':
|
|
case 'utf16le':
|
|
case 'utf-16le':
|
|
return len * 2
|
|
case 'hex':
|
|
return len >>> 1
|
|
case 'base64':
|
|
return base64ToBytes(string).length
|
|
default:
|
|
if (loweredCase) return utf8ToBytes(string).length // assume utf8
|
|
encoding = ('' + encoding).toLowerCase()
|
|
loweredCase = true
|
|
}
|
|
}
|
|
}
|
|
Buffer.byteLength = byteLength
|
|
|
|
function slowToString (encoding, start, end) {
|
|
var loweredCase = false
|
|
|
|
// No need to verify that "this.length <= MAX_UINT32" since it's a read-only
|
|
// property of a typed array.
|
|
|
|
// This behaves neither like String nor Uint8Array in that we set start/end
|
|
// to their upper/lower bounds if the value passed is out of range.
|
|
// undefined is handled specially as per ECMA-262 6th Edition,
|
|
// Section 13.3.3.7 Runtime Semantics: KeyedBindingInitialization.
|
|
if (start === undefined || start < 0) {
|
|
start = 0
|
|
}
|
|
// Return early if start > this.length. Done here to prevent potential uint32
|
|
// coercion fail below.
|
|
if (start > this.length) {
|
|
return ''
|
|
}
|
|
|
|
if (end === undefined || end > this.length) {
|
|
end = this.length
|
|
}
|
|
|
|
if (end <= 0) {
|
|
return ''
|
|
}
|
|
|
|
// Force coersion to uint32. This will also coerce falsey/NaN values to 0.
|
|
end >>>= 0
|
|
start >>>= 0
|
|
|
|
if (end <= start) {
|
|
return ''
|
|
}
|
|
|
|
if (!encoding) encoding = 'utf8'
|
|
|
|
while (true) {
|
|
switch (encoding) {
|
|
case 'hex':
|
|
return hexSlice(this, start, end)
|
|
|
|
case 'utf8':
|
|
case 'utf-8':
|
|
return utf8Slice(this, start, end)
|
|
|
|
case 'ascii':
|
|
return asciiSlice(this, start, end)
|
|
|
|
case 'latin1':
|
|
case 'binary':
|
|
return latin1Slice(this, start, end)
|
|
|
|
case 'base64':
|
|
return base64Slice(this, start, end)
|
|
|
|
case 'ucs2':
|
|
case 'ucs-2':
|
|
case 'utf16le':
|
|
case 'utf-16le':
|
|
return utf16leSlice(this, start, end)
|
|
|
|
default:
|
|
if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)
|
|
encoding = (encoding + '').toLowerCase()
|
|
loweredCase = true
|
|
}
|
|
}
|
|
}
|
|
|
|
// The property is used by `Buffer.isBuffer` and `is-buffer` (in Safari 5-7) to detect
|
|
// Buffer instances.
|
|
Buffer.prototype._isBuffer = true
|
|
|
|
function swap (b, n, m) {
|
|
var i = b[n]
|
|
b[n] = b[m]
|
|
b[m] = i
|
|
}
|
|
|
|
Buffer.prototype.swap16 = function swap16 () {
|
|
var len = this.length
|
|
if (len % 2 !== 0) {
|
|
throw new RangeError('Buffer size must be a multiple of 16-bits')
|
|
}
|
|
for (var i = 0; i < len; i += 2) {
|
|
swap(this, i, i + 1)
|
|
}
|
|
return this
|
|
}
|
|
|
|
Buffer.prototype.swap32 = function swap32 () {
|
|
var len = this.length
|
|
if (len % 4 !== 0) {
|
|
throw new RangeError('Buffer size must be a multiple of 32-bits')
|
|
}
|
|
for (var i = 0; i < len; i += 4) {
|
|
swap(this, i, i + 3)
|
|
swap(this, i + 1, i + 2)
|
|
}
|
|
return this
|
|
}
|
|
|
|
Buffer.prototype.swap64 = function swap64 () {
|
|
var len = this.length
|
|
if (len % 8 !== 0) {
|
|
throw new RangeError('Buffer size must be a multiple of 64-bits')
|
|
}
|
|
for (var i = 0; i < len; i += 8) {
|
|
swap(this, i, i + 7)
|
|
swap(this, i + 1, i + 6)
|
|
swap(this, i + 2, i + 5)
|
|
swap(this, i + 3, i + 4)
|
|
}
|
|
return this
|
|
}
|
|
|
|
Buffer.prototype.toString = function toString () {
|
|
var length = this.length | 0
|
|
if (length === 0) return ''
|
|
if (arguments.length === 0) return utf8Slice(this, 0, length)
|
|
return slowToString.apply(this, arguments)
|
|
}
|
|
|
|
Buffer.prototype.equals = function equals (b) {
|
|
if (!Buffer.isBuffer(b)) throw new TypeError('Argument must be a Buffer')
|
|
if (this === b) return true
|
|
return Buffer.compare(this, b) === 0
|
|
}
|
|
|
|
Buffer.prototype.inspect = function inspect () {
|
|
var str = ''
|
|
var max = exports.INSPECT_MAX_BYTES
|
|
if (this.length > 0) {
|
|
str = this.toString('hex', 0, max).match(/.{2}/g).join(' ')
|
|
if (this.length > max) str += ' ... '
|
|
}
|
|
return '<Buffer ' + str + '>'
|
|
}
|
|
|
|
Buffer.prototype.compare = function compare (target, start, end, thisStart, thisEnd) {
|
|
if (!Buffer.isBuffer(target)) {
|
|
throw new TypeError('Argument must be a Buffer')
|
|
}
|
|
|
|
if (start === undefined) {
|
|
start = 0
|
|
}
|
|
if (end === undefined) {
|
|
end = target ? target.length : 0
|
|
}
|
|
if (thisStart === undefined) {
|
|
thisStart = 0
|
|
}
|
|
if (thisEnd === undefined) {
|
|
thisEnd = this.length
|
|
}
|
|
|
|
if (start < 0 || end > target.length || thisStart < 0 || thisEnd > this.length) {
|
|
throw new RangeError('out of range index')
|
|
}
|
|
|
|
if (thisStart >= thisEnd && start >= end) {
|
|
return 0
|
|
}
|
|
if (thisStart >= thisEnd) {
|
|
return -1
|
|
}
|
|
if (start >= end) {
|
|
return 1
|
|
}
|
|
|
|
start >>>= 0
|
|
end >>>= 0
|
|
thisStart >>>= 0
|
|
thisEnd >>>= 0
|
|
|
|
if (this === target) return 0
|
|
|
|
var x = thisEnd - thisStart
|
|
var y = end - start
|
|
var len = Math.min(x, y)
|
|
|
|
var thisCopy = this.slice(thisStart, thisEnd)
|
|
var targetCopy = target.slice(start, end)
|
|
|
|
for (var i = 0; i < len; ++i) {
|
|
if (thisCopy[i] !== targetCopy[i]) {
|
|
x = thisCopy[i]
|
|
y = targetCopy[i]
|
|
break
|
|
}
|
|
}
|
|
|
|
if (x < y) return -1
|
|
if (y < x) return 1
|
|
return 0
|
|
}
|
|
|
|
// Finds either the first index of `val` in `buffer` at offset >= `byteOffset`,
|
|
// OR the last index of `val` in `buffer` at offset <= `byteOffset`.
|
|
//
|
|
// Arguments:
|
|
// - buffer - a Buffer to search
|
|
// - val - a string, Buffer, or number
|
|
// - byteOffset - an index into `buffer`; will be clamped to an int32
|
|
// - encoding - an optional encoding, relevant is val is a string
|
|
// - dir - true for indexOf, false for lastIndexOf
|
|
function bidirectionalIndexOf (buffer, val, byteOffset, encoding, dir) {
|
|
// Empty buffer means no match
|
|
if (buffer.length === 0) return -1
|
|
|
|
// Normalize byteOffset
|
|
if (typeof byteOffset === 'string') {
|
|
encoding = byteOffset
|
|
byteOffset = 0
|
|
} else if (byteOffset > 0x7fffffff) {
|
|
byteOffset = 0x7fffffff
|
|
} else if (byteOffset < -0x80000000) {
|
|
byteOffset = -0x80000000
|
|
}
|
|
byteOffset = +byteOffset // Coerce to Number.
|
|
if (isNaN(byteOffset)) {
|
|
// byteOffset: it it's undefined, null, NaN, "foo", etc, search whole buffer
|
|
byteOffset = dir ? 0 : (buffer.length - 1)
|
|
}
|
|
|
|
// Normalize byteOffset: negative offsets start from the end of the buffer
|
|
if (byteOffset < 0) byteOffset = buffer.length + byteOffset
|
|
if (byteOffset >= buffer.length) {
|
|
if (dir) return -1
|
|
else byteOffset = buffer.length - 1
|
|
} else if (byteOffset < 0) {
|
|
if (dir) byteOffset = 0
|
|
else return -1
|
|
}
|
|
|
|
// Normalize val
|
|
if (typeof val === 'string') {
|
|
val = Buffer.from(val, encoding)
|
|
}
|
|
|
|
// Finally, search either indexOf (if dir is true) or lastIndexOf
|
|
if (Buffer.isBuffer(val)) {
|
|
// Special case: looking for empty string/buffer always fails
|
|
if (val.length === 0) {
|
|
return -1
|
|
}
|
|
return arrayIndexOf(buffer, val, byteOffset, encoding, dir)
|
|
} else if (typeof val === 'number') {
|
|
val = val & 0xFF // Search for a byte value [0-255]
|
|
if (Buffer.TYPED_ARRAY_SUPPORT &&
|
|
typeof Uint8Array.prototype.indexOf === 'function') {
|
|
if (dir) {
|
|
return Uint8Array.prototype.indexOf.call(buffer, val, byteOffset)
|
|
} else {
|
|
return Uint8Array.prototype.lastIndexOf.call(buffer, val, byteOffset)
|
|
}
|
|
}
|
|
return arrayIndexOf(buffer, [ val ], byteOffset, encoding, dir)
|
|
}
|
|
|
|
throw new TypeError('val must be string, number or Buffer')
|
|
}
|
|
|
|
function arrayIndexOf (arr, val, byteOffset, encoding, dir) {
|
|
var indexSize = 1
|
|
var arrLength = arr.length
|
|
var valLength = val.length
|
|
|
|
if (encoding !== undefined) {
|
|
encoding = String(encoding).toLowerCase()
|
|
if (encoding === 'ucs2' || encoding === 'ucs-2' ||
|
|
encoding === 'utf16le' || encoding === 'utf-16le') {
|
|
if (arr.length < 2 || val.length < 2) {
|
|
return -1
|
|
}
|
|
indexSize = 2
|
|
arrLength /= 2
|
|
valLength /= 2
|
|
byteOffset /= 2
|
|
}
|
|
}
|
|
|
|
function read (buf, i) {
|
|
if (indexSize === 1) {
|
|
return buf[i]
|
|
} else {
|
|
return buf.readUInt16BE(i * indexSize)
|
|
}
|
|
}
|
|
|
|
var i
|
|
if (dir) {
|
|
var foundIndex = -1
|
|
for (i = byteOffset; i < arrLength; i++) {
|
|
if (read(arr, i) === read(val, foundIndex === -1 ? 0 : i - foundIndex)) {
|
|
if (foundIndex === -1) foundIndex = i
|
|
if (i - foundIndex + 1 === valLength) return foundIndex * indexSize
|
|
} else {
|
|
if (foundIndex !== -1) i -= i - foundIndex
|
|
foundIndex = -1
|
|
}
|
|
}
|
|
} else {
|
|
if (byteOffset + valLength > arrLength) byteOffset = arrLength - valLength
|
|
for (i = byteOffset; i >= 0; i--) {
|
|
var found = true
|
|
for (var j = 0; j < valLength; j++) {
|
|
if (read(arr, i + j) !== read(val, j)) {
|
|
found = false
|
|
break
|
|
}
|
|
}
|
|
if (found) return i
|
|
}
|
|
}
|
|
|
|
return -1
|
|
}
|
|
|
|
Buffer.prototype.includes = function includes (val, byteOffset, encoding) {
|
|
return this.indexOf(val, byteOffset, encoding) !== -1
|
|
}
|
|
|
|
Buffer.prototype.indexOf = function indexOf (val, byteOffset, encoding) {
|
|
return bidirectionalIndexOf(this, val, byteOffset, encoding, true)
|
|
}
|
|
|
|
Buffer.prototype.lastIndexOf = function lastIndexOf (val, byteOffset, encoding) {
|
|
return bidirectionalIndexOf(this, val, byteOffset, encoding, false)
|
|
}
|
|
|
|
function hexWrite (buf, string, offset, length) {
|
|
offset = Number(offset) || 0
|
|
var remaining = buf.length - offset
|
|
if (!length) {
|
|
length = remaining
|
|
} else {
|
|
length = Number(length)
|
|
if (length > remaining) {
|
|
length = remaining
|
|
}
|
|
}
|
|
|
|
// must be an even number of digits
|
|
var strLen = string.length
|
|
if (strLen % 2 !== 0) throw new TypeError('Invalid hex string')
|
|
|
|
if (length > strLen / 2) {
|
|
length = strLen / 2
|
|
}
|
|
for (var i = 0; i < length; ++i) {
|
|
var parsed = parseInt(string.substr(i * 2, 2), 16)
|
|
if (isNaN(parsed)) return i
|
|
buf[offset + i] = parsed
|
|
}
|
|
return i
|
|
}
|
|
|
|
function utf8Write (buf, string, offset, length) {
|
|
return blitBuffer(utf8ToBytes(string, buf.length - offset), buf, offset, length)
|
|
}
|
|
|
|
function asciiWrite (buf, string, offset, length) {
|
|
return blitBuffer(asciiToBytes(string), buf, offset, length)
|
|
}
|
|
|
|
function latin1Write (buf, string, offset, length) {
|
|
return asciiWrite(buf, string, offset, length)
|
|
}
|
|
|
|
function base64Write (buf, string, offset, length) {
|
|
return blitBuffer(base64ToBytes(string), buf, offset, length)
|
|
}
|
|
|
|
function ucs2Write (buf, string, offset, length) {
|
|
return blitBuffer(utf16leToBytes(string, buf.length - offset), buf, offset, length)
|
|
}
|
|
|
|
Buffer.prototype.write = function write (string, offset, length, encoding) {
|
|
// Buffer#write(string)
|
|
if (offset === undefined) {
|
|
encoding = 'utf8'
|
|
length = this.length
|
|
offset = 0
|
|
// Buffer#write(string, encoding)
|
|
} else if (length === undefined && typeof offset === 'string') {
|
|
encoding = offset
|
|
length = this.length
|
|
offset = 0
|
|
// Buffer#write(string, offset[, length][, encoding])
|
|
} else if (isFinite(offset)) {
|
|
offset = offset | 0
|
|
if (isFinite(length)) {
|
|
length = length | 0
|
|
if (encoding === undefined) encoding = 'utf8'
|
|
} else {
|
|
encoding = length
|
|
length = undefined
|
|
}
|
|
// legacy write(string, encoding, offset, length) - remove in v0.13
|
|
} else {
|
|
throw new Error(
|
|
'Buffer.write(string, encoding, offset[, length]) is no longer supported'
|
|
)
|
|
}
|
|
|
|
var remaining = this.length - offset
|
|
if (length === undefined || length > remaining) length = remaining
|
|
|
|
if ((string.length > 0 && (length < 0 || offset < 0)) || offset > this.length) {
|
|
throw new RangeError('Attempt to write outside buffer bounds')
|
|
}
|
|
|
|
if (!encoding) encoding = 'utf8'
|
|
|
|
var loweredCase = false
|
|
for (;;) {
|
|
switch (encoding) {
|
|
case 'hex':
|
|
return hexWrite(this, string, offset, length)
|
|
|
|
case 'utf8':
|
|
case 'utf-8':
|
|
return utf8Write(this, string, offset, length)
|
|
|
|
case 'ascii':
|
|
return asciiWrite(this, string, offset, length)
|
|
|
|
case 'latin1':
|
|
case 'binary':
|
|
return latin1Write(this, string, offset, length)
|
|
|
|
case 'base64':
|
|
// Warning: maxLength not taken into account in base64Write
|
|
return base64Write(this, string, offset, length)
|
|
|
|
case 'ucs2':
|
|
case 'ucs-2':
|
|
case 'utf16le':
|
|
case 'utf-16le':
|
|
return ucs2Write(this, string, offset, length)
|
|
|
|
default:
|
|
if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)
|
|
encoding = ('' + encoding).toLowerCase()
|
|
loweredCase = true
|
|
}
|
|
}
|
|
}
|
|
|
|
Buffer.prototype.toJSON = function toJSON () {
|
|
return {
|
|
type: 'Buffer',
|
|
data: Array.prototype.slice.call(this._arr || this, 0)
|
|
}
|
|
}
|
|
|
|
function base64Slice (buf, start, end) {
|
|
if (start === 0 && end === buf.length) {
|
|
return base64.fromByteArray(buf)
|
|
} else {
|
|
return base64.fromByteArray(buf.slice(start, end))
|
|
}
|
|
}
|
|
|
|
function utf8Slice (buf, start, end) {
|
|
end = Math.min(buf.length, end)
|
|
var res = []
|
|
|
|
var i = start
|
|
while (i < end) {
|
|
var firstByte = buf[i]
|
|
var codePoint = null
|
|
var bytesPerSequence = (firstByte > 0xEF) ? 4
|
|
: (firstByte > 0xDF) ? 3
|
|
: (firstByte > 0xBF) ? 2
|
|
: 1
|
|
|
|
if (i + bytesPerSequence <= end) {
|
|
var secondByte, thirdByte, fourthByte, tempCodePoint
|
|
|
|
switch (bytesPerSequence) {
|
|
case 1:
|
|
if (firstByte < 0x80) {
|
|
codePoint = firstByte
|
|
}
|
|
break
|
|
case 2:
|
|
secondByte = buf[i + 1]
|
|
if ((secondByte & 0xC0) === 0x80) {
|
|
tempCodePoint = (firstByte & 0x1F) << 0x6 | (secondByte & 0x3F)
|
|
if (tempCodePoint > 0x7F) {
|
|
codePoint = tempCodePoint
|
|
}
|
|
}
|
|
break
|
|
case 3:
|
|
secondByte = buf[i + 1]
|
|
thirdByte = buf[i + 2]
|
|
if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80) {
|
|
tempCodePoint = (firstByte & 0xF) << 0xC | (secondByte & 0x3F) << 0x6 | (thirdByte & 0x3F)
|
|
if (tempCodePoint > 0x7FF && (tempCodePoint < 0xD800 || tempCodePoint > 0xDFFF)) {
|
|
codePoint = tempCodePoint
|
|
}
|
|
}
|
|
break
|
|
case 4:
|
|
secondByte = buf[i + 1]
|
|
thirdByte = buf[i + 2]
|
|
fourthByte = buf[i + 3]
|
|
if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80 && (fourthByte & 0xC0) === 0x80) {
|
|
tempCodePoint = (firstByte & 0xF) << 0x12 | (secondByte & 0x3F) << 0xC | (thirdByte & 0x3F) << 0x6 | (fourthByte & 0x3F)
|
|
if (tempCodePoint > 0xFFFF && tempCodePoint < 0x110000) {
|
|
codePoint = tempCodePoint
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (codePoint === null) {
|
|
// we did not generate a valid codePoint so insert a
|
|
// replacement char (U+FFFD) and advance only 1 byte
|
|
codePoint = 0xFFFD
|
|
bytesPerSequence = 1
|
|
} else if (codePoint > 0xFFFF) {
|
|
// encode to utf16 (surrogate pair dance)
|
|
codePoint -= 0x10000
|
|
res.push(codePoint >>> 10 & 0x3FF | 0xD800)
|
|
codePoint = 0xDC00 | codePoint & 0x3FF
|
|
}
|
|
|
|
res.push(codePoint)
|
|
i += bytesPerSequence
|
|
}
|
|
|
|
return decodeCodePointsArray(res)
|
|
}
|
|
|
|
// Based on http://stackoverflow.com/a/22747272/680742, the browser with
|
|
// the lowest limit is Chrome, with 0x10000 args.
|
|
// We go 1 magnitude less, for safety
|
|
var MAX_ARGUMENTS_LENGTH = 0x1000
|
|
|
|
function decodeCodePointsArray (codePoints) {
|
|
var len = codePoints.length
|
|
if (len <= MAX_ARGUMENTS_LENGTH) {
|
|
return String.fromCharCode.apply(String, codePoints) // avoid extra slice()
|
|
}
|
|
|
|
// Decode in chunks to avoid "call stack size exceeded".
|
|
var res = ''
|
|
var i = 0
|
|
while (i < len) {
|
|
res += String.fromCharCode.apply(
|
|
String,
|
|
codePoints.slice(i, i += MAX_ARGUMENTS_LENGTH)
|
|
)
|
|
}
|
|
return res
|
|
}
|
|
|
|
function asciiSlice (buf, start, end) {
|
|
var ret = ''
|
|
end = Math.min(buf.length, end)
|
|
|
|
for (var i = start; i < end; ++i) {
|
|
ret += String.fromCharCode(buf[i] & 0x7F)
|
|
}
|
|
return ret
|
|
}
|
|
|
|
function latin1Slice (buf, start, end) {
|
|
var ret = ''
|
|
end = Math.min(buf.length, end)
|
|
|
|
for (var i = start; i < end; ++i) {
|
|
ret += String.fromCharCode(buf[i])
|
|
}
|
|
return ret
|
|
}
|
|
|
|
function hexSlice (buf, start, end) {
|
|
var len = buf.length
|
|
|
|
if (!start || start < 0) start = 0
|
|
if (!end || end < 0 || end > len) end = len
|
|
|
|
var out = ''
|
|
for (var i = start; i < end; ++i) {
|
|
out += toHex(buf[i])
|
|
}
|
|
return out
|
|
}
|
|
|
|
function utf16leSlice (buf, start, end) {
|
|
var bytes = buf.slice(start, end)
|
|
var res = ''
|
|
for (var i = 0; i < bytes.length; i += 2) {
|
|
res += String.fromCharCode(bytes[i] + bytes[i + 1] * 256)
|
|
}
|
|
return res
|
|
}
|
|
|
|
Buffer.prototype.slice = function slice (start, end) {
|
|
var len = this.length
|
|
start = ~~start
|
|
end = end === undefined ? len : ~~end
|
|
|
|
if (start < 0) {
|
|
start += len
|
|
if (start < 0) start = 0
|
|
} else if (start > len) {
|
|
start = len
|
|
}
|
|
|
|
if (end < 0) {
|
|
end += len
|
|
if (end < 0) end = 0
|
|
} else if (end > len) {
|
|
end = len
|
|
}
|
|
|
|
if (end < start) end = start
|
|
|
|
var newBuf
|
|
if (Buffer.TYPED_ARRAY_SUPPORT) {
|
|
newBuf = this.subarray(start, end)
|
|
newBuf.__proto__ = Buffer.prototype
|
|
} else {
|
|
var sliceLen = end - start
|
|
newBuf = new Buffer(sliceLen, undefined)
|
|
for (var i = 0; i < sliceLen; ++i) {
|
|
newBuf[i] = this[i + start]
|
|
}
|
|
}
|
|
|
|
return newBuf
|
|
}
|
|
|
|
/*
|
|
* Need to make sure that buffer isn't trying to write out of bounds.
|
|
*/
|
|
function checkOffset (offset, ext, length) {
|
|
if ((offset % 1) !== 0 || offset < 0) throw new RangeError('offset is not uint')
|
|
if (offset + ext > length) throw new RangeError('Trying to access beyond buffer length')
|
|
}
|
|
|
|
Buffer.prototype.readUIntLE = function readUIntLE (offset, byteLength, noAssert) {
|
|
offset = offset | 0
|
|
byteLength = byteLength | 0
|
|
if (!noAssert) checkOffset(offset, byteLength, this.length)
|
|
|
|
var val = this[offset]
|
|
var mul = 1
|
|
var i = 0
|
|
while (++i < byteLength && (mul *= 0x100)) {
|
|
val += this[offset + i] * mul
|
|
}
|
|
|
|
return val
|
|
}
|
|
|
|
Buffer.prototype.readUIntBE = function readUIntBE (offset, byteLength, noAssert) {
|
|
offset = offset | 0
|
|
byteLength = byteLength | 0
|
|
if (!noAssert) {
|
|
checkOffset(offset, byteLength, this.length)
|
|
}
|
|
|
|
var val = this[offset + --byteLength]
|
|
var mul = 1
|
|
while (byteLength > 0 && (mul *= 0x100)) {
|
|
val += this[offset + --byteLength] * mul
|
|
}
|
|
|
|
return val
|
|
}
|
|
|
|
Buffer.prototype.readUInt8 = function readUInt8 (offset, noAssert) {
|
|
if (!noAssert) checkOffset(offset, 1, this.length)
|
|
return this[offset]
|
|
}
|
|
|
|
Buffer.prototype.readUInt16LE = function readUInt16LE (offset, noAssert) {
|
|
if (!noAssert) checkOffset(offset, 2, this.length)
|
|
return this[offset] | (this[offset + 1] << 8)
|
|
}
|
|
|
|
Buffer.prototype.readUInt16BE = function readUInt16BE (offset, noAssert) {
|
|
if (!noAssert) checkOffset(offset, 2, this.length)
|
|
return (this[offset] << 8) | this[offset + 1]
|
|
}
|
|
|
|
Buffer.prototype.readUInt32LE = function readUInt32LE (offset, noAssert) {
|
|
if (!noAssert) checkOffset(offset, 4, this.length)
|
|
|
|
return ((this[offset]) |
|
|
(this[offset + 1] << 8) |
|
|
(this[offset + 2] << 16)) +
|
|
(this[offset + 3] * 0x1000000)
|
|
}
|
|
|
|
Buffer.prototype.readUInt32BE = function readUInt32BE (offset, noAssert) {
|
|
if (!noAssert) checkOffset(offset, 4, this.length)
|
|
|
|
return (this[offset] * 0x1000000) +
|
|
((this[offset + 1] << 16) |
|
|
(this[offset + 2] << 8) |
|
|
this[offset + 3])
|
|
}
|
|
|
|
Buffer.prototype.readIntLE = function readIntLE (offset, byteLength, noAssert) {
|
|
offset = offset | 0
|
|
byteLength = byteLength | 0
|
|
if (!noAssert) checkOffset(offset, byteLength, this.length)
|
|
|
|
var val = this[offset]
|
|
var mul = 1
|
|
var i = 0
|
|
while (++i < byteLength && (mul *= 0x100)) {
|
|
val += this[offset + i] * mul
|
|
}
|
|
mul *= 0x80
|
|
|
|
if (val >= mul) val -= Math.pow(2, 8 * byteLength)
|
|
|
|
return val
|
|
}
|
|
|
|
Buffer.prototype.readIntBE = function readIntBE (offset, byteLength, noAssert) {
|
|
offset = offset | 0
|
|
byteLength = byteLength | 0
|
|
if (!noAssert) checkOffset(offset, byteLength, this.length)
|
|
|
|
var i = byteLength
|
|
var mul = 1
|
|
var val = this[offset + --i]
|
|
while (i > 0 && (mul *= 0x100)) {
|
|
val += this[offset + --i] * mul
|
|
}
|
|
mul *= 0x80
|
|
|
|
if (val >= mul) val -= Math.pow(2, 8 * byteLength)
|
|
|
|
return val
|
|
}
|
|
|
|
Buffer.prototype.readInt8 = function readInt8 (offset, noAssert) {
|
|
if (!noAssert) checkOffset(offset, 1, this.length)
|
|
if (!(this[offset] & 0x80)) return (this[offset])
|
|
return ((0xff - this[offset] + 1) * -1)
|
|
}
|
|
|
|
Buffer.prototype.readInt16LE = function readInt16LE (offset, noAssert) {
|
|
if (!noAssert) checkOffset(offset, 2, this.length)
|
|
var val = this[offset] | (this[offset + 1] << 8)
|
|
return (val & 0x8000) ? val | 0xFFFF0000 : val
|
|
}
|
|
|
|
Buffer.prototype.readInt16BE = function readInt16BE (offset, noAssert) {
|
|
if (!noAssert) checkOffset(offset, 2, this.length)
|
|
var val = this[offset + 1] | (this[offset] << 8)
|
|
return (val & 0x8000) ? val | 0xFFFF0000 : val
|
|
}
|
|
|
|
Buffer.prototype.readInt32LE = function readInt32LE (offset, noAssert) {
|
|
if (!noAssert) checkOffset(offset, 4, this.length)
|
|
|
|
return (this[offset]) |
|
|
(this[offset + 1] << 8) |
|
|
(this[offset + 2] << 16) |
|
|
(this[offset + 3] << 24)
|
|
}
|
|
|
|
Buffer.prototype.readInt32BE = function readInt32BE (offset, noAssert) {
|
|
if (!noAssert) checkOffset(offset, 4, this.length)
|
|
|
|
return (this[offset] << 24) |
|
|
(this[offset + 1] << 16) |
|
|
(this[offset + 2] << 8) |
|
|
(this[offset + 3])
|
|
}
|
|
|
|
Buffer.prototype.readFloatLE = function readFloatLE (offset, noAssert) {
|
|
if (!noAssert) checkOffset(offset, 4, this.length)
|
|
return ieee754.read(this, offset, true, 23, 4)
|
|
}
|
|
|
|
Buffer.prototype.readFloatBE = function readFloatBE (offset, noAssert) {
|
|
if (!noAssert) checkOffset(offset, 4, this.length)
|
|
return ieee754.read(this, offset, false, 23, 4)
|
|
}
|
|
|
|
Buffer.prototype.readDoubleLE = function readDoubleLE (offset, noAssert) {
|
|
if (!noAssert) checkOffset(offset, 8, this.length)
|
|
return ieee754.read(this, offset, true, 52, 8)
|
|
}
|
|
|
|
Buffer.prototype.readDoubleBE = function readDoubleBE (offset, noAssert) {
|
|
if (!noAssert) checkOffset(offset, 8, this.length)
|
|
return ieee754.read(this, offset, false, 52, 8)
|
|
}
|
|
|
|
function checkInt (buf, value, offset, ext, max, min) {
|
|
if (!Buffer.isBuffer(buf)) throw new TypeError('"buffer" argument must be a Buffer instance')
|
|
if (value > max || value < min) throw new RangeError('"value" argument is out of bounds')
|
|
if (offset + ext > buf.length) throw new RangeError('Index out of range')
|
|
}
|
|
|
|
Buffer.prototype.writeUIntLE = function writeUIntLE (value, offset, byteLength, noAssert) {
|
|
value = +value
|
|
offset = offset | 0
|
|
byteLength = byteLength | 0
|
|
if (!noAssert) {
|
|
var maxBytes = Math.pow(2, 8 * byteLength) - 1
|
|
checkInt(this, value, offset, byteLength, maxBytes, 0)
|
|
}
|
|
|
|
var mul = 1
|
|
var i = 0
|
|
this[offset] = value & 0xFF
|
|
while (++i < byteLength && (mul *= 0x100)) {
|
|
this[offset + i] = (value / mul) & 0xFF
|
|
}
|
|
|
|
return offset + byteLength
|
|
}
|
|
|
|
Buffer.prototype.writeUIntBE = function writeUIntBE (value, offset, byteLength, noAssert) {
|
|
value = +value
|
|
offset = offset | 0
|
|
byteLength = byteLength | 0
|
|
if (!noAssert) {
|
|
var maxBytes = Math.pow(2, 8 * byteLength) - 1
|
|
checkInt(this, value, offset, byteLength, maxBytes, 0)
|
|
}
|
|
|
|
var i = byteLength - 1
|
|
var mul = 1
|
|
this[offset + i] = value & 0xFF
|
|
while (--i >= 0 && (mul *= 0x100)) {
|
|
this[offset + i] = (value / mul) & 0xFF
|
|
}
|
|
|
|
return offset + byteLength
|
|
}
|
|
|
|
Buffer.prototype.writeUInt8 = function writeUInt8 (value, offset, noAssert) {
|
|
value = +value
|
|
offset = offset | 0
|
|
if (!noAssert) checkInt(this, value, offset, 1, 0xff, 0)
|
|
if (!Buffer.TYPED_ARRAY_SUPPORT) value = Math.floor(value)
|
|
this[offset] = (value & 0xff)
|
|
return offset + 1
|
|
}
|
|
|
|
function objectWriteUInt16 (buf, value, offset, littleEndian) {
|
|
if (value < 0) value = 0xffff + value + 1
|
|
for (var i = 0, j = Math.min(buf.length - offset, 2); i < j; ++i) {
|
|
buf[offset + i] = (value & (0xff << (8 * (littleEndian ? i : 1 - i)))) >>>
|
|
(littleEndian ? i : 1 - i) * 8
|
|
}
|
|
}
|
|
|
|
Buffer.prototype.writeUInt16LE = function writeUInt16LE (value, offset, noAssert) {
|
|
value = +value
|
|
offset = offset | 0
|
|
if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)
|
|
if (Buffer.TYPED_ARRAY_SUPPORT) {
|
|
this[offset] = (value & 0xff)
|
|
this[offset + 1] = (value >>> 8)
|
|
} else {
|
|
objectWriteUInt16(this, value, offset, true)
|
|
}
|
|
return offset + 2
|
|
}
|
|
|
|
Buffer.prototype.writeUInt16BE = function writeUInt16BE (value, offset, noAssert) {
|
|
value = +value
|
|
offset = offset | 0
|
|
if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)
|
|
if (Buffer.TYPED_ARRAY_SUPPORT) {
|
|
this[offset] = (value >>> 8)
|
|
this[offset + 1] = (value & 0xff)
|
|
} else {
|
|
objectWriteUInt16(this, value, offset, false)
|
|
}
|
|
return offset + 2
|
|
}
|
|
|
|
function objectWriteUInt32 (buf, value, offset, littleEndian) {
|
|
if (value < 0) value = 0xffffffff + value + 1
|
|
for (var i = 0, j = Math.min(buf.length - offset, 4); i < j; ++i) {
|
|
buf[offset + i] = (value >>> (littleEndian ? i : 3 - i) * 8) & 0xff
|
|
}
|
|
}
|
|
|
|
Buffer.prototype.writeUInt32LE = function writeUInt32LE (value, offset, noAssert) {
|
|
value = +value
|
|
offset = offset | 0
|
|
if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)
|
|
if (Buffer.TYPED_ARRAY_SUPPORT) {
|
|
this[offset + 3] = (value >>> 24)
|
|
this[offset + 2] = (value >>> 16)
|
|
this[offset + 1] = (value >>> 8)
|
|
this[offset] = (value & 0xff)
|
|
} else {
|
|
objectWriteUInt32(this, value, offset, true)
|
|
}
|
|
return offset + 4
|
|
}
|
|
|
|
Buffer.prototype.writeUInt32BE = function writeUInt32BE (value, offset, noAssert) {
|
|
value = +value
|
|
offset = offset | 0
|
|
if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)
|
|
if (Buffer.TYPED_ARRAY_SUPPORT) {
|
|
this[offset] = (value >>> 24)
|
|
this[offset + 1] = (value >>> 16)
|
|
this[offset + 2] = (value >>> 8)
|
|
this[offset + 3] = (value & 0xff)
|
|
} else {
|
|
objectWriteUInt32(this, value, offset, false)
|
|
}
|
|
return offset + 4
|
|
}
|
|
|
|
Buffer.prototype.writeIntLE = function writeIntLE (value, offset, byteLength, noAssert) {
|
|
value = +value
|
|
offset = offset | 0
|
|
if (!noAssert) {
|
|
var limit = Math.pow(2, 8 * byteLength - 1)
|
|
|
|
checkInt(this, value, offset, byteLength, limit - 1, -limit)
|
|
}
|
|
|
|
var i = 0
|
|
var mul = 1
|
|
var sub = 0
|
|
this[offset] = value & 0xFF
|
|
while (++i < byteLength && (mul *= 0x100)) {
|
|
if (value < 0 && sub === 0 && this[offset + i - 1] !== 0) {
|
|
sub = 1
|
|
}
|
|
this[offset + i] = ((value / mul) >> 0) - sub & 0xFF
|
|
}
|
|
|
|
return offset + byteLength
|
|
}
|
|
|
|
Buffer.prototype.writeIntBE = function writeIntBE (value, offset, byteLength, noAssert) {
|
|
value = +value
|
|
offset = offset | 0
|
|
if (!noAssert) {
|
|
var limit = Math.pow(2, 8 * byteLength - 1)
|
|
|
|
checkInt(this, value, offset, byteLength, limit - 1, -limit)
|
|
}
|
|
|
|
var i = byteLength - 1
|
|
var mul = 1
|
|
var sub = 0
|
|
this[offset + i] = value & 0xFF
|
|
while (--i >= 0 && (mul *= 0x100)) {
|
|
if (value < 0 && sub === 0 && this[offset + i + 1] !== 0) {
|
|
sub = 1
|
|
}
|
|
this[offset + i] = ((value / mul) >> 0) - sub & 0xFF
|
|
}
|
|
|
|
return offset + byteLength
|
|
}
|
|
|
|
Buffer.prototype.writeInt8 = function writeInt8 (value, offset, noAssert) {
|
|
value = +value
|
|
offset = offset | 0
|
|
if (!noAssert) checkInt(this, value, offset, 1, 0x7f, -0x80)
|
|
if (!Buffer.TYPED_ARRAY_SUPPORT) value = Math.floor(value)
|
|
if (value < 0) value = 0xff + value + 1
|
|
this[offset] = (value & 0xff)
|
|
return offset + 1
|
|
}
|
|
|
|
Buffer.prototype.writeInt16LE = function writeInt16LE (value, offset, noAssert) {
|
|
value = +value
|
|
offset = offset | 0
|
|
if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)
|
|
if (Buffer.TYPED_ARRAY_SUPPORT) {
|
|
this[offset] = (value & 0xff)
|
|
this[offset + 1] = (value >>> 8)
|
|
} else {
|
|
objectWriteUInt16(this, value, offset, true)
|
|
}
|
|
return offset + 2
|
|
}
|
|
|
|
Buffer.prototype.writeInt16BE = function writeInt16BE (value, offset, noAssert) {
|
|
value = +value
|
|
offset = offset | 0
|
|
if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)
|
|
if (Buffer.TYPED_ARRAY_SUPPORT) {
|
|
this[offset] = (value >>> 8)
|
|
this[offset + 1] = (value & 0xff)
|
|
} else {
|
|
objectWriteUInt16(this, value, offset, false)
|
|
}
|
|
return offset + 2
|
|
}
|
|
|
|
Buffer.prototype.writeInt32LE = function writeInt32LE (value, offset, noAssert) {
|
|
value = +value
|
|
offset = offset | 0
|
|
if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)
|
|
if (Buffer.TYPED_ARRAY_SUPPORT) {
|
|
this[offset] = (value & 0xff)
|
|
this[offset + 1] = (value >>> 8)
|
|
this[offset + 2] = (value >>> 16)
|
|
this[offset + 3] = (value >>> 24)
|
|
} else {
|
|
objectWriteUInt32(this, value, offset, true)
|
|
}
|
|
return offset + 4
|
|
}
|
|
|
|
Buffer.prototype.writeInt32BE = function writeInt32BE (value, offset, noAssert) {
|
|
value = +value
|
|
offset = offset | 0
|
|
if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)
|
|
if (value < 0) value = 0xffffffff + value + 1
|
|
if (Buffer.TYPED_ARRAY_SUPPORT) {
|
|
this[offset] = (value >>> 24)
|
|
this[offset + 1] = (value >>> 16)
|
|
this[offset + 2] = (value >>> 8)
|
|
this[offset + 3] = (value & 0xff)
|
|
} else {
|
|
objectWriteUInt32(this, value, offset, false)
|
|
}
|
|
return offset + 4
|
|
}
|
|
|
|
function checkIEEE754 (buf, value, offset, ext, max, min) {
|
|
if (offset + ext > buf.length) throw new RangeError('Index out of range')
|
|
if (offset < 0) throw new RangeError('Index out of range')
|
|
}
|
|
|
|
function writeFloat (buf, value, offset, littleEndian, noAssert) {
|
|
if (!noAssert) {
|
|
checkIEEE754(buf, value, offset, 4, 3.4028234663852886e+38, -3.4028234663852886e+38)
|
|
}
|
|
ieee754.write(buf, value, offset, littleEndian, 23, 4)
|
|
return offset + 4
|
|
}
|
|
|
|
Buffer.prototype.writeFloatLE = function writeFloatLE (value, offset, noAssert) {
|
|
return writeFloat(this, value, offset, true, noAssert)
|
|
}
|
|
|
|
Buffer.prototype.writeFloatBE = function writeFloatBE (value, offset, noAssert) {
|
|
return writeFloat(this, value, offset, false, noAssert)
|
|
}
|
|
|
|
function writeDouble (buf, value, offset, littleEndian, noAssert) {
|
|
if (!noAssert) {
|
|
checkIEEE754(buf, value, offset, 8, 1.7976931348623157E+308, -1.7976931348623157E+308)
|
|
}
|
|
ieee754.write(buf, value, offset, littleEndian, 52, 8)
|
|
return offset + 8
|
|
}
|
|
|
|
Buffer.prototype.writeDoubleLE = function writeDoubleLE (value, offset, noAssert) {
|
|
return writeDouble(this, value, offset, true, noAssert)
|
|
}
|
|
|
|
Buffer.prototype.writeDoubleBE = function writeDoubleBE (value, offset, noAssert) {
|
|
return writeDouble(this, value, offset, false, noAssert)
|
|
}
|
|
|
|
// copy(targetBuffer, targetStart=0, sourceStart=0, sourceEnd=buffer.length)
|
|
Buffer.prototype.copy = function copy (target, targetStart, start, end) {
|
|
if (!start) start = 0
|
|
if (!end && end !== 0) end = this.length
|
|
if (targetStart >= target.length) targetStart = target.length
|
|
if (!targetStart) targetStart = 0
|
|
if (end > 0 && end < start) end = start
|
|
|
|
// Copy 0 bytes; we're done
|
|
if (end === start) return 0
|
|
if (target.length === 0 || this.length === 0) return 0
|
|
|
|
// Fatal error conditions
|
|
if (targetStart < 0) {
|
|
throw new RangeError('targetStart out of bounds')
|
|
}
|
|
if (start < 0 || start >= this.length) throw new RangeError('sourceStart out of bounds')
|
|
if (end < 0) throw new RangeError('sourceEnd out of bounds')
|
|
|
|
// Are we oob?
|
|
if (end > this.length) end = this.length
|
|
if (target.length - targetStart < end - start) {
|
|
end = target.length - targetStart + start
|
|
}
|
|
|
|
var len = end - start
|
|
var i
|
|
|
|
if (this === target && start < targetStart && targetStart < end) {
|
|
// descending copy from end
|
|
for (i = len - 1; i >= 0; --i) {
|
|
target[i + targetStart] = this[i + start]
|
|
}
|
|
} else if (len < 1000 || !Buffer.TYPED_ARRAY_SUPPORT) {
|
|
// ascending copy from start
|
|
for (i = 0; i < len; ++i) {
|
|
target[i + targetStart] = this[i + start]
|
|
}
|
|
} else {
|
|
Uint8Array.prototype.set.call(
|
|
target,
|
|
this.subarray(start, start + len),
|
|
targetStart
|
|
)
|
|
}
|
|
|
|
return len
|
|
}
|
|
|
|
// Usage:
|
|
// buffer.fill(number[, offset[, end]])
|
|
// buffer.fill(buffer[, offset[, end]])
|
|
// buffer.fill(string[, offset[, end]][, encoding])
|
|
Buffer.prototype.fill = function fill (val, start, end, encoding) {
|
|
// Handle string cases:
|
|
if (typeof val === 'string') {
|
|
if (typeof start === 'string') {
|
|
encoding = start
|
|
start = 0
|
|
end = this.length
|
|
} else if (typeof end === 'string') {
|
|
encoding = end
|
|
end = this.length
|
|
}
|
|
if (val.length === 1) {
|
|
var code = val.charCodeAt(0)
|
|
if (code < 256) {
|
|
val = code
|
|
}
|
|
}
|
|
if (encoding !== undefined && typeof encoding !== 'string') {
|
|
throw new TypeError('encoding must be a string')
|
|
}
|
|
if (typeof encoding === 'string' && !Buffer.isEncoding(encoding)) {
|
|
throw new TypeError('Unknown encoding: ' + encoding)
|
|
}
|
|
} else if (typeof val === 'number') {
|
|
val = val & 255
|
|
}
|
|
|
|
// Invalid ranges are not set to a default, so can range check early.
|
|
if (start < 0 || this.length < start || this.length < end) {
|
|
throw new RangeError('Out of range index')
|
|
}
|
|
|
|
if (end <= start) {
|
|
return this
|
|
}
|
|
|
|
start = start >>> 0
|
|
end = end === undefined ? this.length : end >>> 0
|
|
|
|
if (!val) val = 0
|
|
|
|
var i
|
|
if (typeof val === 'number') {
|
|
for (i = start; i < end; ++i) {
|
|
this[i] = val
|
|
}
|
|
} else {
|
|
var bytes = Buffer.isBuffer(val)
|
|
? val
|
|
: utf8ToBytes(new Buffer(val, encoding).toString())
|
|
var len = bytes.length
|
|
for (i = 0; i < end - start; ++i) {
|
|
this[i + start] = bytes[i % len]
|
|
}
|
|
}
|
|
|
|
return this
|
|
}
|
|
|
|
// HELPER FUNCTIONS
|
|
// ================
|
|
|
|
var INVALID_BASE64_RE = /[^+\/0-9A-Za-z-_]/g
|
|
|
|
function base64clean (str) {
|
|
// Node strips out invalid characters like \n and \t from the string, base64-js does not
|
|
str = stringtrim(str).replace(INVALID_BASE64_RE, '')
|
|
// Node converts strings with length < 2 to ''
|
|
if (str.length < 2) return ''
|
|
// Node allows for non-padded base64 strings (missing trailing ===), base64-js does not
|
|
while (str.length % 4 !== 0) {
|
|
str = str + '='
|
|
}
|
|
return str
|
|
}
|
|
|
|
function stringtrim (str) {
|
|
if (str.trim) return str.trim()
|
|
return str.replace(/^\s+|\s+$/g, '')
|
|
}
|
|
|
|
function toHex (n) {
|
|
if (n < 16) return '0' + n.toString(16)
|
|
return n.toString(16)
|
|
}
|
|
|
|
function utf8ToBytes (string, units) {
|
|
units = units || Infinity
|
|
var codePoint
|
|
var length = string.length
|
|
var leadSurrogate = null
|
|
var bytes = []
|
|
|
|
for (var i = 0; i < length; ++i) {
|
|
codePoint = string.charCodeAt(i)
|
|
|
|
// is surrogate component
|
|
if (codePoint > 0xD7FF && codePoint < 0xE000) {
|
|
// last char was a lead
|
|
if (!leadSurrogate) {
|
|
// no lead yet
|
|
if (codePoint > 0xDBFF) {
|
|
// unexpected trail
|
|
if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
|
|
continue
|
|
} else if (i + 1 === length) {
|
|
// unpaired lead
|
|
if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
|
|
continue
|
|
}
|
|
|
|
// valid lead
|
|
leadSurrogate = codePoint
|
|
|
|
continue
|
|
}
|
|
|
|
// 2 leads in a row
|
|
if (codePoint < 0xDC00) {
|
|
if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
|
|
leadSurrogate = codePoint
|
|
continue
|
|
}
|
|
|
|
// valid surrogate pair
|
|
codePoint = (leadSurrogate - 0xD800 << 10 | codePoint - 0xDC00) + 0x10000
|
|
} else if (leadSurrogate) {
|
|
// valid bmp char, but last char was a lead
|
|
if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
|
|
}
|
|
|
|
leadSurrogate = null
|
|
|
|
// encode utf8
|
|
if (codePoint < 0x80) {
|
|
if ((units -= 1) < 0) break
|
|
bytes.push(codePoint)
|
|
} else if (codePoint < 0x800) {
|
|
if ((units -= 2) < 0) break
|
|
bytes.push(
|
|
codePoint >> 0x6 | 0xC0,
|
|
codePoint & 0x3F | 0x80
|
|
)
|
|
} else if (codePoint < 0x10000) {
|
|
if ((units -= 3) < 0) break
|
|
bytes.push(
|
|
codePoint >> 0xC | 0xE0,
|
|
codePoint >> 0x6 & 0x3F | 0x80,
|
|
codePoint & 0x3F | 0x80
|
|
)
|
|
} else if (codePoint < 0x110000) {
|
|
if ((units -= 4) < 0) break
|
|
bytes.push(
|
|
codePoint >> 0x12 | 0xF0,
|
|
codePoint >> 0xC & 0x3F | 0x80,
|
|
codePoint >> 0x6 & 0x3F | 0x80,
|
|
codePoint & 0x3F | 0x80
|
|
)
|
|
} else {
|
|
throw new Error('Invalid code point')
|
|
}
|
|
}
|
|
|
|
return bytes
|
|
}
|
|
|
|
function asciiToBytes (str) {
|
|
var byteArray = []
|
|
for (var i = 0; i < str.length; ++i) {
|
|
// Node's code seems to be doing this and not & 0x7F..
|
|
byteArray.push(str.charCodeAt(i) & 0xFF)
|
|
}
|
|
return byteArray
|
|
}
|
|
|
|
function utf16leToBytes (str, units) {
|
|
var c, hi, lo
|
|
var byteArray = []
|
|
for (var i = 0; i < str.length; ++i) {
|
|
if ((units -= 2) < 0) break
|
|
|
|
c = str.charCodeAt(i)
|
|
hi = c >> 8
|
|
lo = c % 256
|
|
byteArray.push(lo)
|
|
byteArray.push(hi)
|
|
}
|
|
|
|
return byteArray
|
|
}
|
|
|
|
function base64ToBytes (str) {
|
|
return base64.toByteArray(base64clean(str))
|
|
}
|
|
|
|
function blitBuffer (src, dst, offset, length) {
|
|
for (var i = 0; i < length; ++i) {
|
|
if ((i + offset >= dst.length) || (i >= src.length)) break
|
|
dst[i + offset] = src[i]
|
|
}
|
|
return i
|
|
}
|
|
|
|
function isnan (val) {
|
|
return val !== val // eslint-disable-line no-self-compare
|
|
}
|
|
|
|
/* WEBPACK VAR INJECTION */}.call(this, __webpack_require__(/*! ./../webpack/buildin/global.js */ "./node_modules/webpack/buildin/global.js")))
|
|
|
|
/***/ }),
|
|
|
|
/***/ "./node_modules/ieee754/index.js":
|
|
/*!***************************************!*\
|
|
!*** ./node_modules/ieee754/index.js ***!
|
|
\***************************************/
|
|
/*! no static exports found */
|
|
/***/ (function(module, exports) {
|
|
|
|
exports.read = function (buffer, offset, isLE, mLen, nBytes) {
|
|
var e, m
|
|
var eLen = (nBytes * 8) - mLen - 1
|
|
var eMax = (1 << eLen) - 1
|
|
var eBias = eMax >> 1
|
|
var nBits = -7
|
|
var i = isLE ? (nBytes - 1) : 0
|
|
var d = isLE ? -1 : 1
|
|
var s = buffer[offset + i]
|
|
|
|
i += d
|
|
|
|
e = s & ((1 << (-nBits)) - 1)
|
|
s >>= (-nBits)
|
|
nBits += eLen
|
|
for (; nBits > 0; e = (e * 256) + buffer[offset + i], i += d, nBits -= 8) {}
|
|
|
|
m = e & ((1 << (-nBits)) - 1)
|
|
e >>= (-nBits)
|
|
nBits += mLen
|
|
for (; nBits > 0; m = (m * 256) + buffer[offset + i], i += d, nBits -= 8) {}
|
|
|
|
if (e === 0) {
|
|
e = 1 - eBias
|
|
} else if (e === eMax) {
|
|
return m ? NaN : ((s ? -1 : 1) * Infinity)
|
|
} else {
|
|
m = m + Math.pow(2, mLen)
|
|
e = e - eBias
|
|
}
|
|
return (s ? -1 : 1) * m * Math.pow(2, e - mLen)
|
|
}
|
|
|
|
exports.write = function (buffer, value, offset, isLE, mLen, nBytes) {
|
|
var e, m, c
|
|
var eLen = (nBytes * 8) - mLen - 1
|
|
var eMax = (1 << eLen) - 1
|
|
var eBias = eMax >> 1
|
|
var rt = (mLen === 23 ? Math.pow(2, -24) - Math.pow(2, -77) : 0)
|
|
var i = isLE ? 0 : (nBytes - 1)
|
|
var d = isLE ? 1 : -1
|
|
var s = value < 0 || (value === 0 && 1 / value < 0) ? 1 : 0
|
|
|
|
value = Math.abs(value)
|
|
|
|
if (isNaN(value) || value === Infinity) {
|
|
m = isNaN(value) ? 1 : 0
|
|
e = eMax
|
|
} else {
|
|
e = Math.floor(Math.log(value) / Math.LN2)
|
|
if (value * (c = Math.pow(2, -e)) < 1) {
|
|
e--
|
|
c *= 2
|
|
}
|
|
if (e + eBias >= 1) {
|
|
value += rt / c
|
|
} else {
|
|
value += rt * Math.pow(2, 1 - eBias)
|
|
}
|
|
if (value * c >= 2) {
|
|
e++
|
|
c /= 2
|
|
}
|
|
|
|
if (e + eBias >= eMax) {
|
|
m = 0
|
|
e = eMax
|
|
} else if (e + eBias >= 1) {
|
|
m = ((value * c) - 1) * Math.pow(2, mLen)
|
|
e = e + eBias
|
|
} else {
|
|
m = value * Math.pow(2, eBias - 1) * Math.pow(2, mLen)
|
|
e = 0
|
|
}
|
|
}
|
|
|
|
for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) {}
|
|
|
|
e = (e << mLen) | m
|
|
eLen += mLen
|
|
for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) {}
|
|
|
|
buffer[offset + i - d] |= s * 128
|
|
}
|
|
|
|
|
|
/***/ }),
|
|
|
|
/***/ "./node_modules/isarray/index.js":
|
|
/*!***************************************!*\
|
|
!*** ./node_modules/isarray/index.js ***!
|
|
\***************************************/
|
|
/*! no static exports found */
|
|
/***/ (function(module, exports) {
|
|
|
|
var toString = {}.toString;
|
|
|
|
module.exports = Array.isArray || function (arr) {
|
|
return toString.call(arr) == '[object Array]';
|
|
};
|
|
|
|
|
|
/***/ }),
|
|
|
|
/***/ "./node_modules/safe-buffer/index.js":
|
|
/*!*******************************************!*\
|
|
!*** ./node_modules/safe-buffer/index.js ***!
|
|
\*******************************************/
|
|
/*! no static exports found */
|
|
/***/ (function(module, exports, __webpack_require__) {
|
|
|
|
/* eslint-disable node/no-deprecated-api */
|
|
var buffer = __webpack_require__(/*! buffer */ "./node_modules/buffer/index.js")
|
|
var Buffer = buffer.Buffer
|
|
|
|
// alternative to using Object.keys for old browsers
|
|
function copyProps (src, dst) {
|
|
for (var key in src) {
|
|
dst[key] = src[key]
|
|
}
|
|
}
|
|
if (Buffer.from && Buffer.alloc && Buffer.allocUnsafe && Buffer.allocUnsafeSlow) {
|
|
module.exports = buffer
|
|
} else {
|
|
// Copy properties from require('buffer')
|
|
copyProps(buffer, exports)
|
|
exports.Buffer = SafeBuffer
|
|
}
|
|
|
|
function SafeBuffer (arg, encodingOrOffset, length) {
|
|
return Buffer(arg, encodingOrOffset, length)
|
|
}
|
|
|
|
// Copy static methods from Buffer
|
|
copyProps(Buffer, SafeBuffer)
|
|
|
|
SafeBuffer.from = function (arg, encodingOrOffset, length) {
|
|
if (typeof arg === 'number') {
|
|
throw new TypeError('Argument must not be a number')
|
|
}
|
|
return Buffer(arg, encodingOrOffset, length)
|
|
}
|
|
|
|
SafeBuffer.alloc = function (size, fill, encoding) {
|
|
if (typeof size !== 'number') {
|
|
throw new TypeError('Argument must be a number')
|
|
}
|
|
var buf = Buffer(size)
|
|
if (fill !== undefined) {
|
|
if (typeof encoding === 'string') {
|
|
buf.fill(fill, encoding)
|
|
} else {
|
|
buf.fill(fill)
|
|
}
|
|
} else {
|
|
buf.fill(0)
|
|
}
|
|
return buf
|
|
}
|
|
|
|
SafeBuffer.allocUnsafe = function (size) {
|
|
if (typeof size !== 'number') {
|
|
throw new TypeError('Argument must be a number')
|
|
}
|
|
return Buffer(size)
|
|
}
|
|
|
|
SafeBuffer.allocUnsafeSlow = function (size) {
|
|
if (typeof size !== 'number') {
|
|
throw new TypeError('Argument must be a number')
|
|
}
|
|
return buffer.SlowBuffer(size)
|
|
}
|
|
|
|
|
|
/***/ }),
|
|
|
|
/***/ "./node_modules/webpack/buildin/global.js":
|
|
/*!***********************************!*\
|
|
!*** (webpack)/buildin/global.js ***!
|
|
\***********************************/
|
|
/*! no static exports found */
|
|
/***/ (function(module, exports) {
|
|
|
|
var g;
|
|
|
|
// This works in non-strict mode
|
|
g = (function() {
|
|
return this;
|
|
})();
|
|
|
|
try {
|
|
// This works if eval is allowed (see CSP)
|
|
g = g || new Function("return this")();
|
|
} catch (e) {
|
|
// This works if the window reference is available
|
|
if (typeof window === "object") g = window;
|
|
}
|
|
|
|
// g can still be undefined, but nothing to do about it...
|
|
// We return undefined, instead of nothing here, so it's
|
|
// easier to handle this case. if(!global) { ...}
|
|
|
|
module.exports = g;
|
|
|
|
|
|
/***/ }),
|
|
|
|
/***/ "./src/base.js":
|
|
/*!*********************!*\
|
|
!*** ./src/base.js ***!
|
|
\*********************/
|
|
/*! no static exports found */
|
|
/***/ (function(module, exports, __webpack_require__) {
|
|
|
|
"use strict";
|
|
|
|
|
|
class Base {
|
|
constructor (name, code, implementation, alphabet) {
|
|
this.name = name
|
|
this.code = code
|
|
this.alphabet = alphabet
|
|
if (implementation && alphabet) {
|
|
this.engine = implementation(alphabet)
|
|
}
|
|
}
|
|
|
|
encode (stringOrBuffer) {
|
|
return this.engine.encode(stringOrBuffer)
|
|
}
|
|
|
|
decode (stringOrBuffer) {
|
|
return this.engine.decode(stringOrBuffer)
|
|
}
|
|
|
|
isImplemented () {
|
|
return this.engine
|
|
}
|
|
}
|
|
|
|
module.exports = Base
|
|
|
|
|
|
/***/ }),
|
|
|
|
/***/ "./src/base16.js":
|
|
/*!***********************!*\
|
|
!*** ./src/base16.js ***!
|
|
\***********************/
|
|
/*! no static exports found */
|
|
/***/ (function(module, exports, __webpack_require__) {
|
|
|
|
"use strict";
|
|
/* WEBPACK VAR INJECTION */(function(Buffer) {
|
|
|
|
module.exports = function base16 (alphabet) {
|
|
return {
|
|
encode (input) {
|
|
if (typeof input === 'string') {
|
|
return Buffer.from(input).toString('hex')
|
|
}
|
|
return input.toString('hex')
|
|
},
|
|
decode (input) {
|
|
for (let char of input) {
|
|
if (alphabet.indexOf(char) < 0) {
|
|
throw new Error('invalid base16 character')
|
|
}
|
|
}
|
|
return Buffer.from(input, 'hex')
|
|
}
|
|
}
|
|
}
|
|
|
|
/* WEBPACK VAR INJECTION */}.call(this, __webpack_require__(/*! ./../node_modules/buffer/index.js */ "./node_modules/buffer/index.js").Buffer))
|
|
|
|
/***/ }),
|
|
|
|
/***/ "./src/base32.js":
|
|
/*!***********************!*\
|
|
!*** ./src/base32.js ***!
|
|
\***********************/
|
|
/*! no static exports found */
|
|
/***/ (function(module, exports, __webpack_require__) {
|
|
|
|
"use strict";
|
|
/* WEBPACK VAR INJECTION */(function(Buffer) {
|
|
|
|
function decode (input, alphabet) {
|
|
input = input.replace(new RegExp('=', 'g'), '')
|
|
let length = input.length
|
|
|
|
let bits = 0
|
|
let value = 0
|
|
|
|
let index = 0
|
|
let output = new Uint8Array((length * 5 / 8) | 0)
|
|
|
|
for (let i = 0; i < length; i++) {
|
|
value = (value << 5) | alphabet.indexOf(input[i])
|
|
bits += 5
|
|
|
|
if (bits >= 8) {
|
|
output[index++] = (value >>> (bits - 8)) & 255
|
|
bits -= 8
|
|
}
|
|
}
|
|
|
|
return output.buffer
|
|
}
|
|
|
|
function encode (buffer, alphabet) {
|
|
let length = buffer.byteLength
|
|
let view = new Uint8Array(buffer)
|
|
let padding = alphabet.indexOf('=') === alphabet.length - 1
|
|
|
|
if (padding) {
|
|
alphabet = alphabet.substring(0, alphabet.length - 2)
|
|
}
|
|
|
|
let bits = 0
|
|
let value = 0
|
|
let output = ''
|
|
|
|
for (let i = 0; i < length; i++) {
|
|
value = (value << 8) | view[i]
|
|
bits += 8
|
|
|
|
while (bits >= 5) {
|
|
output += alphabet[(value >>> (bits - 5)) & 31]
|
|
bits -= 5
|
|
}
|
|
}
|
|
|
|
if (bits > 0) {
|
|
output += alphabet[(value << (5 - bits)) & 31]
|
|
}
|
|
|
|
if (padding) {
|
|
while ((output.length % 8) !== 0) {
|
|
output += '='
|
|
}
|
|
}
|
|
|
|
return output
|
|
}
|
|
|
|
module.exports = function base32 (alphabet) {
|
|
return {
|
|
encode (input) {
|
|
if (typeof input === 'string') {
|
|
return encode(Buffer.from(input), alphabet)
|
|
}
|
|
|
|
return encode(input, alphabet)
|
|
},
|
|
decode (input) {
|
|
for (let char of input) {
|
|
if (alphabet.indexOf(char) < 0) {
|
|
throw new Error('invalid base32 character')
|
|
}
|
|
}
|
|
|
|
return decode(input, alphabet)
|
|
}
|
|
}
|
|
}
|
|
|
|
/* WEBPACK VAR INJECTION */}.call(this, __webpack_require__(/*! ./../node_modules/buffer/index.js */ "./node_modules/buffer/index.js").Buffer))
|
|
|
|
/***/ }),
|
|
|
|
/***/ "./src/base64.js":
|
|
/*!***********************!*\
|
|
!*** ./src/base64.js ***!
|
|
\***********************/
|
|
/*! no static exports found */
|
|
/***/ (function(module, exports, __webpack_require__) {
|
|
|
|
"use strict";
|
|
/* WEBPACK VAR INJECTION */(function(Buffer) {
|
|
|
|
module.exports = function base64 (alphabet) {
|
|
// The alphabet is only used to know:
|
|
// 1. If padding is enabled (must contain '=')
|
|
// 2. If the output must be url-safe (must contain '-' and '_')
|
|
// 3. If the input of the output function is valid
|
|
// The alphabets from RFC 4648 are always used.
|
|
const padding = alphabet.indexOf('=') > -1
|
|
const url = alphabet.indexOf('-') > -1 && alphabet.indexOf('_') > -1
|
|
|
|
return {
|
|
encode (input) {
|
|
let output = ''
|
|
|
|
if (typeof input === 'string') {
|
|
output = Buffer.from(input).toString('base64')
|
|
} else {
|
|
output = input.toString('base64')
|
|
}
|
|
|
|
if (url) {
|
|
output = output.replace(/\+/g, '-').replace(/\//g, '_')
|
|
}
|
|
|
|
const pad = output.indexOf('=')
|
|
if (pad > 0 && !padding) {
|
|
output = output.substring(0, pad)
|
|
}
|
|
|
|
return output
|
|
},
|
|
decode (input) {
|
|
for (let char of input) {
|
|
if (alphabet.indexOf(char) < 0) {
|
|
throw new Error('invalid base64 character')
|
|
}
|
|
}
|
|
|
|
return Buffer.from(input, 'base64')
|
|
}
|
|
}
|
|
}
|
|
|
|
/* WEBPACK VAR INJECTION */}.call(this, __webpack_require__(/*! ./../node_modules/buffer/index.js */ "./node_modules/buffer/index.js").Buffer))
|
|
|
|
/***/ }),
|
|
|
|
/***/ "./src/constants.js":
|
|
/*!**************************!*\
|
|
!*** ./src/constants.js ***!
|
|
\**************************/
|
|
/*! no static exports found */
|
|
/***/ (function(module, exports, __webpack_require__) {
|
|
|
|
"use strict";
|
|
|
|
|
|
const Base = __webpack_require__(/*! ./base.js */ "./src/base.js")
|
|
const baseX = __webpack_require__(/*! base-x */ "./node_modules/base-x/index.js")
|
|
const base16 = __webpack_require__(/*! ./base16 */ "./src/base16.js")
|
|
const base32 = __webpack_require__(/*! ./base32 */ "./src/base32.js")
|
|
const base64 = __webpack_require__(/*! ./base64 */ "./src/base64.js")
|
|
|
|
// name, code, implementation, alphabet
|
|
const constants = [
|
|
['base1', '1', '', '1'],
|
|
['base2', '0', baseX, '01'],
|
|
['base8', '7', baseX, '01234567'],
|
|
['base10', '9', baseX, '0123456789'],
|
|
['base16', 'f', base16, '0123456789abcdef'],
|
|
['base32', 'b', base32, 'abcdefghijklmnopqrstuvwxyz234567'],
|
|
['base32pad', 'c', base32, 'abcdefghijklmnopqrstuvwxyz234567='],
|
|
['base32hex', 'v', base32, '0123456789abcdefghijklmnopqrstuv'],
|
|
['base32hexpad', 't', base32, '0123456789abcdefghijklmnopqrstuv='],
|
|
['base32z', 'h', base32, 'ybndrfg8ejkmcpqxot1uwisza345h769'],
|
|
['base58flickr', 'Z', baseX, '123456789abcdefghijkmnopqrstuvwxyzABCDEFGHJKLMNPQRSTUVWXYZ'],
|
|
['base58btc', 'z', baseX, '123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz'],
|
|
['base64', 'm', base64, 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'],
|
|
['base64pad', 'M', base64, 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/='],
|
|
['base64url', 'u', base64, 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_'],
|
|
['base64urlpad', 'U', base64, 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_=']
|
|
]
|
|
|
|
const names = constants.reduce((prev, tupple) => {
|
|
prev[tupple[0]] = new Base(tupple[0], tupple[1], tupple[2], tupple[3])
|
|
return prev
|
|
}, {})
|
|
|
|
const codes = constants.reduce((prev, tupple) => {
|
|
prev[tupple[1]] = names[tupple[0]]
|
|
return prev
|
|
}, {})
|
|
|
|
module.exports = {
|
|
names: names,
|
|
codes: codes
|
|
}
|
|
|
|
|
|
/***/ }),
|
|
|
|
/***/ "./src/index.js":
|
|
/*!**********************!*\
|
|
!*** ./src/index.js ***!
|
|
\**********************/
|
|
/*! no static exports found */
|
|
/***/ (function(module, exports, __webpack_require__) {
|
|
|
|
"use strict";
|
|
/* WEBPACK VAR INJECTION */(function(Buffer) {/**
|
|
* Implementation of the [multibase](https://github.com/multiformats/multibase) specification.
|
|
* @module Multibase
|
|
*/
|
|
|
|
|
|
const constants = __webpack_require__(/*! ./constants */ "./src/constants.js")
|
|
|
|
exports = module.exports = multibase
|
|
exports.encode = encode
|
|
exports.decode = decode
|
|
exports.isEncoded = isEncoded
|
|
exports.names = Object.freeze(Object.keys(constants.names))
|
|
exports.codes = Object.freeze(Object.keys(constants.codes))
|
|
exports.Buffer = Buffer;
|
|
|
|
const errNotSupported = new Error('Unsupported encoding')
|
|
|
|
/**
|
|
* Create a new buffer with the multibase varint+code.
|
|
*
|
|
* @param {string|number} nameOrCode - The multibase name or code number.
|
|
* @param {Buffer} buf - The data to be prefixed with multibase.
|
|
* @memberof Multibase
|
|
* @returns {Buffer}
|
|
*/
|
|
function multibase (nameOrCode, buf) {
|
|
if (!buf) {
|
|
throw new Error('requires an encoded buffer')
|
|
}
|
|
const base = getBase(nameOrCode)
|
|
const codeBuf = Buffer.from(base.code)
|
|
|
|
const name = base.name
|
|
validEncode(name, buf)
|
|
return Buffer.concat([codeBuf, buf])
|
|
}
|
|
|
|
/**
|
|
* Encode data with the specified base and add the multibase prefix.
|
|
*
|
|
* @param {string|number} nameOrCode - The multibase name or code number.
|
|
* @param {Buffer} buf - The data to be encoded.
|
|
* @returns {Buffer}
|
|
* @memberof Multibase
|
|
*/
|
|
function encode (nameOrCode, buf) {
|
|
const base = getBase(nameOrCode)
|
|
const name = base.name
|
|
|
|
return multibase(name, Buffer.from(base.encode(buf)))
|
|
}
|
|
|
|
/**
|
|
* Takes a buffer or string encoded with multibase header, decodes it and
|
|
* returns the decoded buffer
|
|
*
|
|
* @param {Buffer|string} bufOrString
|
|
* @returns {Buffer}
|
|
* @memberof Multibase
|
|
*
|
|
*/
|
|
function decode (bufOrString) {
|
|
if (Buffer.isBuffer(bufOrString)) {
|
|
bufOrString = bufOrString.toString()
|
|
}
|
|
|
|
const code = bufOrString.substring(0, 1)
|
|
bufOrString = bufOrString.substring(1, bufOrString.length)
|
|
|
|
if (typeof bufOrString === 'string') {
|
|
bufOrString = Buffer.from(bufOrString)
|
|
}
|
|
|
|
const base = getBase(code)
|
|
return Buffer.from(base.decode(bufOrString.toString()))
|
|
}
|
|
|
|
/**
|
|
* Is the given data multibase encoded?
|
|
*
|
|
* @param {Buffer|string} bufOrString
|
|
* @returns {boolean}
|
|
* @memberof Multibase
|
|
*/
|
|
function isEncoded (bufOrString) {
|
|
if (Buffer.isBuffer(bufOrString)) {
|
|
bufOrString = bufOrString.toString()
|
|
}
|
|
|
|
// Ensure bufOrString is a string
|
|
if (Object.prototype.toString.call(bufOrString) !== '[object String]') {
|
|
return false
|
|
}
|
|
|
|
const code = bufOrString.substring(0, 1)
|
|
try {
|
|
const base = getBase(code)
|
|
return base.name
|
|
} catch (err) {
|
|
return false
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @param {string} name
|
|
* @param {Buffer} buf
|
|
* @private
|
|
* @returns {undefined}
|
|
*/
|
|
function validEncode (name, buf) {
|
|
const base = getBase(name)
|
|
base.decode(buf.toString())
|
|
}
|
|
|
|
function getBase (nameOrCode) {
|
|
let base
|
|
|
|
if (constants.names[nameOrCode]) {
|
|
base = constants.names[nameOrCode]
|
|
} else if (constants.codes[nameOrCode]) {
|
|
base = constants.codes[nameOrCode]
|
|
} else {
|
|
throw errNotSupported
|
|
}
|
|
|
|
if (!base.isImplemented()) {
|
|
throw new Error('Base ' + nameOrCode + ' is not implemented yet')
|
|
}
|
|
|
|
return base
|
|
}
|
|
|
|
/* WEBPACK VAR INJECTION */}.call(this, __webpack_require__(/*! ./../node_modules/buffer/index.js */ "./node_modules/buffer/index.js").Buffer))
|
|
|
|
/***/ }),
|
|
|
|
/***/ 0:
|
|
/*!****************************!*\
|
|
!*** multi ./src/index.js ***!
|
|
\****************************/
|
|
/*! no static exports found */
|
|
/***/ (function(module, exports, __webpack_require__) {
|
|
|
|
module.exports = __webpack_require__(/*! /Users/sachav/src/loki-project/js-multibase/src/index.js */"./src/index.js");
|
|
|
|
|
|
/***/ })
|
|
|
|
/******/ });
|
|
//# sourceMappingURL=index.js.map
|