j?j:g+f));return 1===d?(b=a[c-1],e.push(k[b>>2]+k[63&b<<4]+"==")):2===d&&(b=(a[c-2]<<8)+a[c-1],e.push(k[b>>10]+k[63&b>>4]+k[63&b<<2]+"=")),e.join("")}c.byteLength=function(a){var b=d(a),c=b[0],e=b[1];return 3*(c+e)/4-e},c.toByteArray=f,c.fromByteArray=j;for(var k=[],l=[],m="undefined"==typeof Uint8Array?Array:Uint8Array,n="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/",o=0,p=n.length;o 0) {
+ throw new Error('Invalid string. Length must be a multiple of 4')
+ }
+
+ // Trim off extra bytes after placeholder bytes are found
+ // See: https://github.com/beatgammit/base64-js/issues/42
+ var validLen = b64.indexOf('=')
+ if (validLen === -1) validLen = len
+
+ var placeHoldersLen = validLen === len
+ ? 0
+ : 4 - (validLen % 4)
+
+ return [validLen, placeHoldersLen]
+}
+
+// base64 is 4/3 + up to two characters of the original data
+function byteLength (b64) {
+ var lens = getLens(b64)
+ var validLen = lens[0]
+ var placeHoldersLen = lens[1]
+ return ((validLen + placeHoldersLen) * 3 / 4) - placeHoldersLen
+}
+
+function _byteLength (b64, validLen, placeHoldersLen) {
+ return ((validLen + placeHoldersLen) * 3 / 4) - placeHoldersLen
+}
+
+function toByteArray (b64) {
+ var tmp
+ var lens = getLens(b64)
+ var validLen = lens[0]
+ var placeHoldersLen = lens[1]
+
+ var arr = new Arr(_byteLength(b64, validLen, placeHoldersLen))
+
+ var curByte = 0
+
+ // if there are placeholders, only get up to the last complete 4 chars
+ var len = placeHoldersLen > 0
+ ? validLen - 4
+ : validLen
+
+ var i
+ for (i = 0; i < len; i += 4) {
+ tmp =
+ (revLookup[b64.charCodeAt(i)] << 18) |
+ (revLookup[b64.charCodeAt(i + 1)] << 12) |
+ (revLookup[b64.charCodeAt(i + 2)] << 6) |
+ revLookup[b64.charCodeAt(i + 3)]
+ arr[curByte++] = (tmp >> 16) & 0xFF
+ arr[curByte++] = (tmp >> 8) & 0xFF
+ arr[curByte++] = tmp & 0xFF
+ }
+
+ if (placeHoldersLen === 2) {
+ tmp =
+ (revLookup[b64.charCodeAt(i)] << 2) |
+ (revLookup[b64.charCodeAt(i + 1)] >> 4)
+ arr[curByte++] = tmp & 0xFF
+ }
+
+ if (placeHoldersLen === 1) {
+ tmp =
+ (revLookup[b64.charCodeAt(i)] << 10) |
+ (revLookup[b64.charCodeAt(i + 1)] << 4) |
+ (revLookup[b64.charCodeAt(i + 2)] >> 2)
+ arr[curByte++] = (tmp >> 8) & 0xFF
+ arr[curByte++] = tmp & 0xFF
+ }
+
+ 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
+ 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('')
+}
diff --git a/node_modules/base64-js/package.json b/node_modules/base64-js/package.json
new file mode 100644
index 0000000000..c3972e39f2
--- /dev/null
+++ b/node_modules/base64-js/package.json
@@ -0,0 +1,47 @@
+{
+ "name": "base64-js",
+ "description": "Base64 encoding/decoding in pure JS",
+ "version": "1.5.1",
+ "author": "T. Jameson Little ",
+ "typings": "index.d.ts",
+ "bugs": {
+ "url": "https://github.com/beatgammit/base64-js/issues"
+ },
+ "devDependencies": {
+ "babel-minify": "^0.5.1",
+ "benchmark": "^2.1.4",
+ "browserify": "^16.3.0",
+ "standard": "*",
+ "tape": "4.x"
+ },
+ "homepage": "https://github.com/beatgammit/base64-js",
+ "keywords": [
+ "base64"
+ ],
+ "license": "MIT",
+ "main": "index.js",
+ "repository": {
+ "type": "git",
+ "url": "git://github.com/beatgammit/base64-js.git"
+ },
+ "scripts": {
+ "build": "browserify -s base64js -r ./ | minify > base64js.min.js",
+ "lint": "standard",
+ "test": "npm run lint && npm run unit",
+ "unit": "tape test/*.js"
+ },
+ "funding": [
+ {
+ "type": "github",
+ "url": "https://github.com/sponsors/feross"
+ },
+ {
+ "type": "patreon",
+ "url": "https://www.patreon.com/feross"
+ },
+ {
+ "type": "consulting",
+ "url": "https://feross.org/support"
+ }
+ ]
+}
diff --git a/node_modules/bl/.travis.yml b/node_modules/bl/.travis.yml
new file mode 100644
index 0000000000..016eaf5562
--- /dev/null
+++ b/node_modules/bl/.travis.yml
@@ -0,0 +1,17 @@
+sudo: false
+arch:
+ - amd64
+ - ppc64le
+language: node_js
+node_js:
+ - '6'
+ - '8'
+ - '10'
+ - '12'
+ - '14'
+ - '15'
+ - lts/*
+notifications:
+ email:
+ - rod@vagg.org
+ - matteo.collina@gmail.com
diff --git a/node_modules/bl/BufferList.js b/node_modules/bl/BufferList.js
new file mode 100644
index 0000000000..471ee77889
--- /dev/null
+++ b/node_modules/bl/BufferList.js
@@ -0,0 +1,396 @@
+'use strict'
+
+const { Buffer } = require('buffer')
+const symbol = Symbol.for('BufferList')
+
+function BufferList (buf) {
+ if (!(this instanceof BufferList)) {
+ return new BufferList(buf)
+ }
+
+ BufferList._init.call(this, buf)
+}
+
+BufferList._init = function _init (buf) {
+ Object.defineProperty(this, symbol, { value: true })
+
+ this._bufs = []
+ this.length = 0
+
+ if (buf) {
+ this.append(buf)
+ }
+}
+
+BufferList.prototype._new = function _new (buf) {
+ return new BufferList(buf)
+}
+
+BufferList.prototype._offset = function _offset (offset) {
+ if (offset === 0) {
+ return [0, 0]
+ }
+
+ let tot = 0
+
+ for (let i = 0; i < this._bufs.length; i++) {
+ const _t = tot + this._bufs[i].length
+ if (offset < _t || i === this._bufs.length - 1) {
+ return [i, offset - tot]
+ }
+ tot = _t
+ }
+}
+
+BufferList.prototype._reverseOffset = function (blOffset) {
+ const bufferId = blOffset[0]
+ let offset = blOffset[1]
+
+ for (let i = 0; i < bufferId; i++) {
+ offset += this._bufs[i].length
+ }
+
+ return offset
+}
+
+BufferList.prototype.get = function get (index) {
+ if (index > this.length || index < 0) {
+ return undefined
+ }
+
+ const offset = this._offset(index)
+
+ return this._bufs[offset[0]][offset[1]]
+}
+
+BufferList.prototype.slice = function slice (start, end) {
+ if (typeof start === 'number' && start < 0) {
+ start += this.length
+ }
+
+ if (typeof end === 'number' && end < 0) {
+ end += this.length
+ }
+
+ return this.copy(null, 0, start, end)
+}
+
+BufferList.prototype.copy = function copy (dst, dstStart, srcStart, srcEnd) {
+ if (typeof srcStart !== 'number' || srcStart < 0) {
+ srcStart = 0
+ }
+
+ if (typeof srcEnd !== 'number' || srcEnd > this.length) {
+ srcEnd = this.length
+ }
+
+ if (srcStart >= this.length) {
+ return dst || Buffer.alloc(0)
+ }
+
+ if (srcEnd <= 0) {
+ return dst || Buffer.alloc(0)
+ }
+
+ const copy = !!dst
+ const off = this._offset(srcStart)
+ const len = srcEnd - srcStart
+ let bytes = len
+ let bufoff = (copy && dstStart) || 0
+ let start = off[1]
+
+ // copy/slice everything
+ if (srcStart === 0 && srcEnd === this.length) {
+ if (!copy) {
+ // slice, but full concat if multiple buffers
+ return this._bufs.length === 1
+ ? this._bufs[0]
+ : Buffer.concat(this._bufs, this.length)
+ }
+
+ // copy, need to copy individual buffers
+ for (let i = 0; i < this._bufs.length; i++) {
+ this._bufs[i].copy(dst, bufoff)
+ bufoff += this._bufs[i].length
+ }
+
+ return dst
+ }
+
+ // easy, cheap case where it's a subset of one of the buffers
+ if (bytes <= this._bufs[off[0]].length - start) {
+ return copy
+ ? this._bufs[off[0]].copy(dst, dstStart, start, start + bytes)
+ : this._bufs[off[0]].slice(start, start + bytes)
+ }
+
+ if (!copy) {
+ // a slice, we need something to copy in to
+ dst = Buffer.allocUnsafe(len)
+ }
+
+ for (let i = off[0]; i < this._bufs.length; i++) {
+ const l = this._bufs[i].length - start
+
+ if (bytes > l) {
+ this._bufs[i].copy(dst, bufoff, start)
+ bufoff += l
+ } else {
+ this._bufs[i].copy(dst, bufoff, start, start + bytes)
+ bufoff += l
+ break
+ }
+
+ bytes -= l
+
+ if (start) {
+ start = 0
+ }
+ }
+
+ // safeguard so that we don't return uninitialized memory
+ if (dst.length > bufoff) return dst.slice(0, bufoff)
+
+ return dst
+}
+
+BufferList.prototype.shallowSlice = function shallowSlice (start, end) {
+ start = start || 0
+ end = typeof end !== 'number' ? this.length : end
+
+ if (start < 0) {
+ start += this.length
+ }
+
+ if (end < 0) {
+ end += this.length
+ }
+
+ if (start === end) {
+ return this._new()
+ }
+
+ const startOffset = this._offset(start)
+ const endOffset = this._offset(end)
+ const buffers = this._bufs.slice(startOffset[0], endOffset[0] + 1)
+
+ if (endOffset[1] === 0) {
+ buffers.pop()
+ } else {
+ buffers[buffers.length - 1] = buffers[buffers.length - 1].slice(0, endOffset[1])
+ }
+
+ if (startOffset[1] !== 0) {
+ buffers[0] = buffers[0].slice(startOffset[1])
+ }
+
+ return this._new(buffers)
+}
+
+BufferList.prototype.toString = function toString (encoding, start, end) {
+ return this.slice(start, end).toString(encoding)
+}
+
+BufferList.prototype.consume = function consume (bytes) {
+ // first, normalize the argument, in accordance with how Buffer does it
+ bytes = Math.trunc(bytes)
+ // do nothing if not a positive number
+ if (Number.isNaN(bytes) || bytes <= 0) return this
+
+ while (this._bufs.length) {
+ if (bytes >= this._bufs[0].length) {
+ bytes -= this._bufs[0].length
+ this.length -= this._bufs[0].length
+ this._bufs.shift()
+ } else {
+ this._bufs[0] = this._bufs[0].slice(bytes)
+ this.length -= bytes
+ break
+ }
+ }
+
+ return this
+}
+
+BufferList.prototype.duplicate = function duplicate () {
+ const copy = this._new()
+
+ for (let i = 0; i < this._bufs.length; i++) {
+ copy.append(this._bufs[i])
+ }
+
+ return copy
+}
+
+BufferList.prototype.append = function append (buf) {
+ if (buf == null) {
+ return this
+ }
+
+ if (buf.buffer) {
+ // append a view of the underlying ArrayBuffer
+ this._appendBuffer(Buffer.from(buf.buffer, buf.byteOffset, buf.byteLength))
+ } else if (Array.isArray(buf)) {
+ for (let i = 0; i < buf.length; i++) {
+ this.append(buf[i])
+ }
+ } else if (this._isBufferList(buf)) {
+ // unwrap argument into individual BufferLists
+ for (let i = 0; i < buf._bufs.length; i++) {
+ this.append(buf._bufs[i])
+ }
+ } else {
+ // coerce number arguments to strings, since Buffer(number) does
+ // uninitialized memory allocation
+ if (typeof buf === 'number') {
+ buf = buf.toString()
+ }
+
+ this._appendBuffer(Buffer.from(buf))
+ }
+
+ return this
+}
+
+BufferList.prototype._appendBuffer = function appendBuffer (buf) {
+ this._bufs.push(buf)
+ this.length += buf.length
+}
+
+BufferList.prototype.indexOf = function (search, offset, encoding) {
+ if (encoding === undefined && typeof offset === 'string') {
+ encoding = offset
+ offset = undefined
+ }
+
+ if (typeof search === 'function' || Array.isArray(search)) {
+ throw new TypeError('The "value" argument must be one of type string, Buffer, BufferList, or Uint8Array.')
+ } else if (typeof search === 'number') {
+ search = Buffer.from([search])
+ } else if (typeof search === 'string') {
+ search = Buffer.from(search, encoding)
+ } else if (this._isBufferList(search)) {
+ search = search.slice()
+ } else if (Array.isArray(search.buffer)) {
+ search = Buffer.from(search.buffer, search.byteOffset, search.byteLength)
+ } else if (!Buffer.isBuffer(search)) {
+ search = Buffer.from(search)
+ }
+
+ offset = Number(offset || 0)
+
+ if (isNaN(offset)) {
+ offset = 0
+ }
+
+ if (offset < 0) {
+ offset = this.length + offset
+ }
+
+ if (offset < 0) {
+ offset = 0
+ }
+
+ if (search.length === 0) {
+ return offset > this.length ? this.length : offset
+ }
+
+ const blOffset = this._offset(offset)
+ let blIndex = blOffset[0] // index of which internal buffer we're working on
+ let buffOffset = blOffset[1] // offset of the internal buffer we're working on
+
+ // scan over each buffer
+ for (; blIndex < this._bufs.length; blIndex++) {
+ const buff = this._bufs[blIndex]
+
+ while (buffOffset < buff.length) {
+ const availableWindow = buff.length - buffOffset
+
+ if (availableWindow >= search.length) {
+ const nativeSearchResult = buff.indexOf(search, buffOffset)
+
+ if (nativeSearchResult !== -1) {
+ return this._reverseOffset([blIndex, nativeSearchResult])
+ }
+
+ buffOffset = buff.length - search.length + 1 // end of native search window
+ } else {
+ const revOffset = this._reverseOffset([blIndex, buffOffset])
+
+ if (this._match(revOffset, search)) {
+ return revOffset
+ }
+
+ buffOffset++
+ }
+ }
+
+ buffOffset = 0
+ }
+
+ return -1
+}
+
+BufferList.prototype._match = function (offset, search) {
+ if (this.length - offset < search.length) {
+ return false
+ }
+
+ for (let searchOffset = 0; searchOffset < search.length; searchOffset++) {
+ if (this.get(offset + searchOffset) !== search[searchOffset]) {
+ return false
+ }
+ }
+ return true
+}
+
+;(function () {
+ const methods = {
+ readDoubleBE: 8,
+ readDoubleLE: 8,
+ readFloatBE: 4,
+ readFloatLE: 4,
+ readInt32BE: 4,
+ readInt32LE: 4,
+ readUInt32BE: 4,
+ readUInt32LE: 4,
+ readInt16BE: 2,
+ readInt16LE: 2,
+ readUInt16BE: 2,
+ readUInt16LE: 2,
+ readInt8: 1,
+ readUInt8: 1,
+ readIntBE: null,
+ readIntLE: null,
+ readUIntBE: null,
+ readUIntLE: null
+ }
+
+ for (const m in methods) {
+ (function (m) {
+ if (methods[m] === null) {
+ BufferList.prototype[m] = function (offset, byteLength) {
+ return this.slice(offset, offset + byteLength)[m](0, byteLength)
+ }
+ } else {
+ BufferList.prototype[m] = function (offset = 0) {
+ return this.slice(offset, offset + methods[m])[m](0)
+ }
+ }
+ }(m))
+ }
+}())
+
+// Used internally by the class and also as an indicator of this object being
+// a `BufferList`. It's not possible to use `instanceof BufferList` in a browser
+// environment because there could be multiple different copies of the
+// BufferList class and some `BufferList`s might be `BufferList`s.
+BufferList.prototype._isBufferList = function _isBufferList (b) {
+ return b instanceof BufferList || BufferList.isBufferList(b)
+}
+
+BufferList.isBufferList = function isBufferList (b) {
+ return b != null && b[symbol]
+}
+
+module.exports = BufferList
diff --git a/node_modules/bl/LICENSE.md b/node_modules/bl/LICENSE.md
new file mode 100644
index 0000000000..ecbe516374
--- /dev/null
+++ b/node_modules/bl/LICENSE.md
@@ -0,0 +1,13 @@
+The MIT License (MIT)
+=====================
+
+Copyright (c) 2013-2019 bl contributors
+----------------------------------
+
+*bl contributors listed at *
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/node_modules/bl/README.md b/node_modules/bl/README.md
new file mode 100644
index 0000000000..9680b1dcb4
--- /dev/null
+++ b/node_modules/bl/README.md
@@ -0,0 +1,247 @@
+# bl *(BufferList)*
+
+[](https://travis-ci.com/rvagg/bl/)
+
+**A Node.js Buffer list collector, reader and streamer thingy.**
+
+[](https://nodei.co/npm/bl/)
+
+**bl** is a storage object for collections of Node Buffers, exposing them with the main Buffer readable API. Also works as a duplex stream so you can collect buffers from a stream that emits them and emit buffers to a stream that consumes them!
+
+The original buffers are kept intact and copies are only done as necessary. Any reads that require the use of a single original buffer will return a slice of that buffer only (which references the same memory as the original buffer). Reads that span buffers perform concatenation as required and return the results transparently.
+
+```js
+const { BufferList } = require('bl')
+
+const bl = new BufferList()
+bl.append(Buffer.from('abcd'))
+bl.append(Buffer.from('efg'))
+bl.append('hi') // bl will also accept & convert Strings
+bl.append(Buffer.from('j'))
+bl.append(Buffer.from([ 0x3, 0x4 ]))
+
+console.log(bl.length) // 12
+
+console.log(bl.slice(0, 10).toString('ascii')) // 'abcdefghij'
+console.log(bl.slice(3, 10).toString('ascii')) // 'defghij'
+console.log(bl.slice(3, 6).toString('ascii')) // 'def'
+console.log(bl.slice(3, 8).toString('ascii')) // 'defgh'
+console.log(bl.slice(5, 10).toString('ascii')) // 'fghij'
+
+console.log(bl.indexOf('def')) // 3
+console.log(bl.indexOf('asdf')) // -1
+
+// or just use toString!
+console.log(bl.toString()) // 'abcdefghij\u0003\u0004'
+console.log(bl.toString('ascii', 3, 8)) // 'defgh'
+console.log(bl.toString('ascii', 5, 10)) // 'fghij'
+
+// other standard Buffer readables
+console.log(bl.readUInt16BE(10)) // 0x0304
+console.log(bl.readUInt16LE(10)) // 0x0403
+```
+
+Give it a callback in the constructor and use it just like **[concat-stream](https://github.com/maxogden/node-concat-stream)**:
+
+```js
+const { BufferListStream } = require('bl')
+const fs = require('fs')
+
+fs.createReadStream('README.md')
+ .pipe(BufferListStream((err, data) => { // note 'new' isn't strictly required
+ // `data` is a complete Buffer object containing the full data
+ console.log(data.toString())
+ }))
+```
+
+Note that when you use the *callback* method like this, the resulting `data` parameter is a concatenation of all `Buffer` objects in the list. If you want to avoid the overhead of this concatenation (in cases of extreme performance consciousness), then avoid the *callback* method and just listen to `'end'` instead, like a standard Stream.
+
+Or to fetch a URL using [hyperquest](https://github.com/substack/hyperquest) (should work with [request](http://github.com/mikeal/request) and even plain Node http too!):
+
+```js
+const hyperquest = require('hyperquest')
+const { BufferListStream } = require('bl')
+
+const url = 'https://raw.github.com/rvagg/bl/master/README.md'
+
+hyperquest(url).pipe(BufferListStream((err, data) => {
+ console.log(data.toString())
+}))
+```
+
+Or, use it as a readable stream to recompose a list of Buffers to an output source:
+
+```js
+const { BufferListStream } = require('bl')
+const fs = require('fs')
+
+var bl = new BufferListStream()
+bl.append(Buffer.from('abcd'))
+bl.append(Buffer.from('efg'))
+bl.append(Buffer.from('hi'))
+bl.append(Buffer.from('j'))
+
+bl.pipe(fs.createWriteStream('gibberish.txt'))
+```
+
+## API
+
+ * new BufferList([ buf ])
+ * BufferList.isBufferList(obj)
+ * bl.length
+ * bl.append(buffer)
+ * bl.get(index)
+ * bl.indexOf(value[, byteOffset][, encoding])
+ * bl.slice([ start[, end ] ])
+ * bl.shallowSlice([ start[, end ] ])
+ * bl.copy(dest, [ destStart, [ srcStart [, srcEnd ] ] ])
+ * bl.duplicate()
+ * bl.consume(bytes)
+ * bl.toString([encoding, [ start, [ end ]]])
+ * bl.readDoubleBE(), bl.readDoubleLE(), bl.readFloatBE(), bl.readFloatLE(), bl.readInt32BE(), bl.readInt32LE(), bl.readUInt32BE(), bl.readUInt32LE(), bl.readInt16BE(), bl.readInt16LE(), bl.readUInt16BE(), bl.readUInt16LE(), bl.readInt8(), bl.readUInt8()
+ * new BufferListStream([ callback ])
+
+--------------------------------------------------------
+
+### new BufferList([ Buffer | Buffer array | BufferList | BufferList array | String ])
+No arguments are _required_ for the constructor, but you can initialise the list by passing in a single `Buffer` object or an array of `Buffer` objects.
+
+`new` is not strictly required, if you don't instantiate a new object, it will be done automatically for you so you can create a new instance simply with:
+
+```js
+const { BufferList } = require('bl')
+const bl = BufferList()
+
+// equivalent to:
+
+const { BufferList } = require('bl')
+const bl = new BufferList()
+```
+
+--------------------------------------------------------
+
+### BufferList.isBufferList(obj)
+Determines if the passed object is a `BufferList`. It will return `true` if the passed object is an instance of `BufferList` **or** `BufferListStream` and `false` otherwise.
+
+N.B. this won't return `true` for `BufferList` or `BufferListStream` instances created by versions of this library before this static method was added.
+
+--------------------------------------------------------
+
+### bl.length
+Get the length of the list in bytes. This is the sum of the lengths of all of the buffers contained in the list, minus any initial offset for a semi-consumed buffer at the beginning. Should accurately represent the total number of bytes that can be read from the list.
+
+--------------------------------------------------------
+
+### bl.append(Buffer | Buffer array | BufferList | BufferList array | String)
+`append(buffer)` adds an additional buffer or BufferList to the internal list. `this` is returned so it can be chained.
+
+--------------------------------------------------------
+
+### bl.get(index)
+`get()` will return the byte at the specified index.
+
+--------------------------------------------------------
+
+### bl.indexOf(value[, byteOffset][, encoding])
+`get()` will return the byte at the specified index.
+`indexOf()` method returns the first index at which a given element can be found in the BufferList, or -1 if it is not present.
+
+--------------------------------------------------------
+
+### bl.slice([ start, [ end ] ])
+`slice()` returns a new `Buffer` object containing the bytes within the range specified. Both `start` and `end` are optional and will default to the beginning and end of the list respectively.
+
+If the requested range spans a single internal buffer then a slice of that buffer will be returned which shares the original memory range of that Buffer. If the range spans multiple buffers then copy operations will likely occur to give you a uniform Buffer.
+
+--------------------------------------------------------
+
+### bl.shallowSlice([ start, [ end ] ])
+`shallowSlice()` returns a new `BufferList` object containing the bytes within the range specified. Both `start` and `end` are optional and will default to the beginning and end of the list respectively.
+
+No copies will be performed. All buffers in the result share memory with the original list.
+
+--------------------------------------------------------
+
+### bl.copy(dest, [ destStart, [ srcStart [, srcEnd ] ] ])
+`copy()` copies the content of the list in the `dest` buffer, starting from `destStart` and containing the bytes within the range specified with `srcStart` to `srcEnd`. `destStart`, `start` and `end` are optional and will default to the beginning of the `dest` buffer, and the beginning and end of the list respectively.
+
+--------------------------------------------------------
+
+### bl.duplicate()
+`duplicate()` performs a **shallow-copy** of the list. The internal Buffers remains the same, so if you change the underlying Buffers, the change will be reflected in both the original and the duplicate. This method is needed if you want to call `consume()` or `pipe()` and still keep the original list.Example:
+
+```js
+var bl = new BufferListStream()
+
+bl.append('hello')
+bl.append(' world')
+bl.append('\n')
+
+bl.duplicate().pipe(process.stdout, { end: false })
+
+console.log(bl.toString())
+```
+
+--------------------------------------------------------
+
+### bl.consume(bytes)
+`consume()` will shift bytes *off the start of the list*. The number of bytes consumed don't need to line up with the sizes of the internal Buffers—initial offsets will be calculated accordingly in order to give you a consistent view of the data.
+
+--------------------------------------------------------
+
+### bl.toString([encoding, [ start, [ end ]]])
+`toString()` will return a string representation of the buffer. The optional `start` and `end` arguments are passed on to `slice()`, while the `encoding` is passed on to `toString()` of the resulting Buffer. See the [Buffer#toString()](http://nodejs.org/docs/latest/api/buffer.html#buffer_buf_tostring_encoding_start_end) documentation for more information.
+
+--------------------------------------------------------
+
+### bl.readDoubleBE(), bl.readDoubleLE(), bl.readFloatBE(), bl.readFloatLE(), bl.readInt32BE(), bl.readInt32LE(), bl.readUInt32BE(), bl.readUInt32LE(), bl.readInt16BE(), bl.readInt16LE(), bl.readUInt16BE(), bl.readUInt16LE(), bl.readInt8(), bl.readUInt8()
+
+All of the standard byte-reading methods of the `Buffer` interface are implemented and will operate across internal Buffer boundaries transparently.
+
+See the [Buffer](http://nodejs.org/docs/latest/api/buffer.html) documentation for how these work.
+
+--------------------------------------------------------
+
+### new BufferListStream([ callback | Buffer | Buffer array | BufferList | BufferList array | String ])
+**BufferListStream** is a Node **[Duplex Stream](http://nodejs.org/docs/latest/api/stream.html#stream_class_stream_duplex)**, so it can be read from and written to like a standard Node stream. You can also `pipe()` to and from a **BufferListStream** instance.
+
+The constructor takes an optional callback, if supplied, the callback will be called with an error argument followed by a reference to the **bl** instance, when `bl.end()` is called (i.e. from a piped stream). This is a convenient method of collecting the entire contents of a stream, particularly when the stream is *chunky*, such as a network stream.
+
+Normally, no arguments are required for the constructor, but you can initialise the list by passing in a single `Buffer` object or an array of `Buffer` object.
+
+`new` is not strictly required, if you don't instantiate a new object, it will be done automatically for you so you can create a new instance simply with:
+
+```js
+const { BufferListStream } = require('bl')
+const bl = BufferListStream()
+
+// equivalent to:
+
+const { BufferListStream } = require('bl')
+const bl = new BufferListStream()
+```
+
+N.B. For backwards compatibility reasons, `BufferListStream` is the **default** export when you `require('bl')`:
+
+```js
+const { BufferListStream } = require('bl')
+// equivalent to:
+const BufferListStream = require('bl')
+```
+
+--------------------------------------------------------
+
+## Contributors
+
+**bl** is brought to you by the following hackers:
+
+ * [Rod Vagg](https://github.com/rvagg)
+ * [Matteo Collina](https://github.com/mcollina)
+ * [Jarett Cruger](https://github.com/jcrugzz)
+
+
+## License & copyright
+
+Copyright (c) 2013-2019 bl contributors (listed above).
+
+bl is licensed under the MIT license. All rights not explicitly granted in the MIT license are reserved. See the included LICENSE.md file for more details.
diff --git a/node_modules/bl/bl.js b/node_modules/bl/bl.js
new file mode 100644
index 0000000000..40228f8799
--- /dev/null
+++ b/node_modules/bl/bl.js
@@ -0,0 +1,84 @@
+'use strict'
+
+const DuplexStream = require('readable-stream').Duplex
+const inherits = require('inherits')
+const BufferList = require('./BufferList')
+
+function BufferListStream (callback) {
+ if (!(this instanceof BufferListStream)) {
+ return new BufferListStream(callback)
+ }
+
+ if (typeof callback === 'function') {
+ this._callback = callback
+
+ const piper = function piper (err) {
+ if (this._callback) {
+ this._callback(err)
+ this._callback = null
+ }
+ }.bind(this)
+
+ this.on('pipe', function onPipe (src) {
+ src.on('error', piper)
+ })
+ this.on('unpipe', function onUnpipe (src) {
+ src.removeListener('error', piper)
+ })
+
+ callback = null
+ }
+
+ BufferList._init.call(this, callback)
+ DuplexStream.call(this)
+}
+
+inherits(BufferListStream, DuplexStream)
+Object.assign(BufferListStream.prototype, BufferList.prototype)
+
+BufferListStream.prototype._new = function _new (callback) {
+ return new BufferListStream(callback)
+}
+
+BufferListStream.prototype._write = function _write (buf, encoding, callback) {
+ this._appendBuffer(buf)
+
+ if (typeof callback === 'function') {
+ callback()
+ }
+}
+
+BufferListStream.prototype._read = function _read (size) {
+ if (!this.length) {
+ return this.push(null)
+ }
+
+ size = Math.min(size, this.length)
+ this.push(this.slice(0, size))
+ this.consume(size)
+}
+
+BufferListStream.prototype.end = function end (chunk) {
+ DuplexStream.prototype.end.call(this, chunk)
+
+ if (this._callback) {
+ this._callback(null, this.slice())
+ this._callback = null
+ }
+}
+
+BufferListStream.prototype._destroy = function _destroy (err, cb) {
+ this._bufs.length = 0
+ this.length = 0
+ cb(err)
+}
+
+BufferListStream.prototype._isBufferList = function _isBufferList (b) {
+ return b instanceof BufferListStream || b instanceof BufferList || BufferListStream.isBufferList(b)
+}
+
+BufferListStream.isBufferList = BufferList.isBufferList
+
+module.exports = BufferListStream
+module.exports.BufferListStream = BufferListStream
+module.exports.BufferList = BufferList
diff --git a/node_modules/bl/package.json b/node_modules/bl/package.json
new file mode 100644
index 0000000000..3b2be3f486
--- /dev/null
+++ b/node_modules/bl/package.json
@@ -0,0 +1,37 @@
+{
+ "name": "bl",
+ "version": "4.1.0",
+ "description": "Buffer List: collect buffers and access with a standard readable Buffer interface, streamable too!",
+ "license": "MIT",
+ "main": "bl.js",
+ "scripts": {
+ "lint": "standard *.js test/*.js",
+ "test": "npm run lint && node test/test.js | faucet"
+ },
+ "repository": {
+ "type": "git",
+ "url": "https://github.com/rvagg/bl.git"
+ },
+ "homepage": "https://github.com/rvagg/bl",
+ "authors": [
+ "Rod Vagg (https://github.com/rvagg)",
+ "Matteo Collina (https://github.com/mcollina)",
+ "Jarett Cruger (https://github.com/jcrugzz)"
+ ],
+ "keywords": [
+ "buffer",
+ "buffers",
+ "stream",
+ "awesomesauce"
+ ],
+ "dependencies": {
+ "buffer": "^5.5.0",
+ "inherits": "^2.0.4",
+ "readable-stream": "^3.4.0"
+ },
+ "devDependencies": {
+ "faucet": "~0.0.1",
+ "standard": "^14.3.0",
+ "tape": "^4.11.0"
+ }
+}
diff --git a/node_modules/bl/test/convert.js b/node_modules/bl/test/convert.js
new file mode 100644
index 0000000000..9f3e23599e
--- /dev/null
+++ b/node_modules/bl/test/convert.js
@@ -0,0 +1,21 @@
+'use strict'
+
+const tape = require('tape')
+const { BufferList, BufferListStream } = require('../')
+const { Buffer } = require('buffer')
+
+tape('convert from BufferList to BufferListStream', (t) => {
+ const data = Buffer.from(`TEST-${Date.now()}`)
+ const bl = new BufferList(data)
+ const bls = new BufferListStream(bl)
+ t.ok(bl.slice().equals(bls.slice()))
+ t.end()
+})
+
+tape('convert from BufferListStream to BufferList', (t) => {
+ const data = Buffer.from(`TEST-${Date.now()}`)
+ const bls = new BufferListStream(data)
+ const bl = new BufferList(bls)
+ t.ok(bl.slice().equals(bls.slice()))
+ t.end()
+})
diff --git a/node_modules/bl/test/indexOf.js b/node_modules/bl/test/indexOf.js
new file mode 100644
index 0000000000..62dcb01f3b
--- /dev/null
+++ b/node_modules/bl/test/indexOf.js
@@ -0,0 +1,492 @@
+'use strict'
+
+const tape = require('tape')
+const BufferList = require('../')
+const { Buffer } = require('buffer')
+
+tape('indexOf single byte needle', (t) => {
+ const bl = new BufferList(['abcdefg', 'abcdefg', '12345'])
+
+ t.equal(bl.indexOf('e'), 4)
+ t.equal(bl.indexOf('e', 5), 11)
+ t.equal(bl.indexOf('e', 12), -1)
+ t.equal(bl.indexOf('5'), 18)
+
+ t.end()
+})
+
+tape('indexOf multiple byte needle', (t) => {
+ const bl = new BufferList(['abcdefg', 'abcdefg'])
+
+ t.equal(bl.indexOf('ef'), 4)
+ t.equal(bl.indexOf('ef', 5), 11)
+
+ t.end()
+})
+
+tape('indexOf multiple byte needles across buffer boundaries', (t) => {
+ const bl = new BufferList(['abcdefg', 'abcdefg'])
+
+ t.equal(bl.indexOf('fgabc'), 5)
+
+ t.end()
+})
+
+tape('indexOf takes a Uint8Array search', (t) => {
+ const bl = new BufferList(['abcdefg', 'abcdefg'])
+ const search = new Uint8Array([102, 103, 97, 98, 99]) // fgabc
+
+ t.equal(bl.indexOf(search), 5)
+
+ t.end()
+})
+
+tape('indexOf takes a buffer list search', (t) => {
+ const bl = new BufferList(['abcdefg', 'abcdefg'])
+ const search = new BufferList('fgabc')
+
+ t.equal(bl.indexOf(search), 5)
+
+ t.end()
+})
+
+tape('indexOf a zero byte needle', (t) => {
+ const b = new BufferList('abcdef')
+ const bufEmpty = Buffer.from('')
+
+ t.equal(b.indexOf(''), 0)
+ t.equal(b.indexOf('', 1), 1)
+ t.equal(b.indexOf('', b.length + 1), b.length)
+ t.equal(b.indexOf('', Infinity), b.length)
+ t.equal(b.indexOf(bufEmpty), 0)
+ t.equal(b.indexOf(bufEmpty, 1), 1)
+ t.equal(b.indexOf(bufEmpty, b.length + 1), b.length)
+ t.equal(b.indexOf(bufEmpty, Infinity), b.length)
+
+ t.end()
+})
+
+tape('indexOf buffers smaller and larger than the needle', (t) => {
+ const bl = new BufferList(['abcdefg', 'a', 'bcdefg', 'a', 'bcfgab'])
+
+ t.equal(bl.indexOf('fgabc'), 5)
+ t.equal(bl.indexOf('fgabc', 6), 12)
+ t.equal(bl.indexOf('fgabc', 13), -1)
+
+ t.end()
+})
+
+// only present in node 6+
+;(process.version.substr(1).split('.')[0] >= 6) && tape('indexOf latin1 and binary encoding', (t) => {
+ const b = new BufferList('abcdef')
+
+ // test latin1 encoding
+ t.equal(
+ new BufferList(Buffer.from(b.toString('latin1'), 'latin1'))
+ .indexOf('d', 0, 'latin1'),
+ 3
+ )
+ t.equal(
+ new BufferList(Buffer.from(b.toString('latin1'), 'latin1'))
+ .indexOf(Buffer.from('d', 'latin1'), 0, 'latin1'),
+ 3
+ )
+ t.equal(
+ new BufferList(Buffer.from('aa\u00e8aa', 'latin1'))
+ .indexOf('\u00e8', 'latin1'),
+ 2
+ )
+ t.equal(
+ new BufferList(Buffer.from('\u00e8', 'latin1'))
+ .indexOf('\u00e8', 'latin1'),
+ 0
+ )
+ t.equal(
+ new BufferList(Buffer.from('\u00e8', 'latin1'))
+ .indexOf(Buffer.from('\u00e8', 'latin1'), 'latin1'),
+ 0
+ )
+
+ // test binary encoding
+ t.equal(
+ new BufferList(Buffer.from(b.toString('binary'), 'binary'))
+ .indexOf('d', 0, 'binary'),
+ 3
+ )
+ t.equal(
+ new BufferList(Buffer.from(b.toString('binary'), 'binary'))
+ .indexOf(Buffer.from('d', 'binary'), 0, 'binary'),
+ 3
+ )
+ t.equal(
+ new BufferList(Buffer.from('aa\u00e8aa', 'binary'))
+ .indexOf('\u00e8', 'binary'),
+ 2
+ )
+ t.equal(
+ new BufferList(Buffer.from('\u00e8', 'binary'))
+ .indexOf('\u00e8', 'binary'),
+ 0
+ )
+ t.equal(
+ new BufferList(Buffer.from('\u00e8', 'binary'))
+ .indexOf(Buffer.from('\u00e8', 'binary'), 'binary'),
+ 0
+ )
+
+ t.end()
+})
+
+tape('indexOf the entire nodejs10 buffer test suite', (t) => {
+ const b = new BufferList('abcdef')
+ const bufA = Buffer.from('a')
+ const bufBc = Buffer.from('bc')
+ const bufF = Buffer.from('f')
+ const bufZ = Buffer.from('z')
+
+ const stringComparison = 'abcdef'
+
+ t.equal(b.indexOf('a'), 0)
+ t.equal(b.indexOf('a', 1), -1)
+ t.equal(b.indexOf('a', -1), -1)
+ t.equal(b.indexOf('a', -4), -1)
+ t.equal(b.indexOf('a', -b.length), 0)
+ t.equal(b.indexOf('a', NaN), 0)
+ t.equal(b.indexOf('a', -Infinity), 0)
+ t.equal(b.indexOf('a', Infinity), -1)
+ t.equal(b.indexOf('bc'), 1)
+ t.equal(b.indexOf('bc', 2), -1)
+ t.equal(b.indexOf('bc', -1), -1)
+ t.equal(b.indexOf('bc', -3), -1)
+ t.equal(b.indexOf('bc', -5), 1)
+ t.equal(b.indexOf('bc', NaN), 1)
+ t.equal(b.indexOf('bc', -Infinity), 1)
+ t.equal(b.indexOf('bc', Infinity), -1)
+ t.equal(b.indexOf('f'), b.length - 1)
+ t.equal(b.indexOf('z'), -1)
+
+ // empty search tests
+ t.equal(b.indexOf(bufA), 0)
+ t.equal(b.indexOf(bufA, 1), -1)
+ t.equal(b.indexOf(bufA, -1), -1)
+ t.equal(b.indexOf(bufA, -4), -1)
+ t.equal(b.indexOf(bufA, -b.length), 0)
+ t.equal(b.indexOf(bufA, NaN), 0)
+ t.equal(b.indexOf(bufA, -Infinity), 0)
+ t.equal(b.indexOf(bufA, Infinity), -1)
+ t.equal(b.indexOf(bufBc), 1)
+ t.equal(b.indexOf(bufBc, 2), -1)
+ t.equal(b.indexOf(bufBc, -1), -1)
+ t.equal(b.indexOf(bufBc, -3), -1)
+ t.equal(b.indexOf(bufBc, -5), 1)
+ t.equal(b.indexOf(bufBc, NaN), 1)
+ t.equal(b.indexOf(bufBc, -Infinity), 1)
+ t.equal(b.indexOf(bufBc, Infinity), -1)
+ t.equal(b.indexOf(bufF), b.length - 1)
+ t.equal(b.indexOf(bufZ), -1)
+ t.equal(b.indexOf(0x61), 0)
+ t.equal(b.indexOf(0x61, 1), -1)
+ t.equal(b.indexOf(0x61, -1), -1)
+ t.equal(b.indexOf(0x61, -4), -1)
+ t.equal(b.indexOf(0x61, -b.length), 0)
+ t.equal(b.indexOf(0x61, NaN), 0)
+ t.equal(b.indexOf(0x61, -Infinity), 0)
+ t.equal(b.indexOf(0x61, Infinity), -1)
+ t.equal(b.indexOf(0x0), -1)
+
+ // test offsets
+ t.equal(b.indexOf('d', 2), 3)
+ t.equal(b.indexOf('f', 5), 5)
+ t.equal(b.indexOf('f', -1), 5)
+ t.equal(b.indexOf('f', 6), -1)
+
+ t.equal(b.indexOf(Buffer.from('d'), 2), 3)
+ t.equal(b.indexOf(Buffer.from('f'), 5), 5)
+ t.equal(b.indexOf(Buffer.from('f'), -1), 5)
+ t.equal(b.indexOf(Buffer.from('f'), 6), -1)
+
+ t.equal(Buffer.from('ff').indexOf(Buffer.from('f'), 1, 'ucs2'), -1)
+
+ // test invalid and uppercase encoding
+ t.equal(b.indexOf('b', 'utf8'), 1)
+ t.equal(b.indexOf('b', 'UTF8'), 1)
+ t.equal(b.indexOf('62', 'HEX'), 1)
+ t.throws(() => b.indexOf('bad', 'enc'), TypeError)
+
+ // test hex encoding
+ t.equal(
+ Buffer.from(b.toString('hex'), 'hex')
+ .indexOf('64', 0, 'hex'),
+ 3
+ )
+ t.equal(
+ Buffer.from(b.toString('hex'), 'hex')
+ .indexOf(Buffer.from('64', 'hex'), 0, 'hex'),
+ 3
+ )
+
+ // test base64 encoding
+ t.equal(
+ Buffer.from(b.toString('base64'), 'base64')
+ .indexOf('ZA==', 0, 'base64'),
+ 3
+ )
+ t.equal(
+ Buffer.from(b.toString('base64'), 'base64')
+ .indexOf(Buffer.from('ZA==', 'base64'), 0, 'base64'),
+ 3
+ )
+
+ // test ascii encoding
+ t.equal(
+ Buffer.from(b.toString('ascii'), 'ascii')
+ .indexOf('d', 0, 'ascii'),
+ 3
+ )
+ t.equal(
+ Buffer.from(b.toString('ascii'), 'ascii')
+ .indexOf(Buffer.from('d', 'ascii'), 0, 'ascii'),
+ 3
+ )
+
+ // test optional offset with passed encoding
+ t.equal(Buffer.from('aaaa0').indexOf('30', 'hex'), 4)
+ t.equal(Buffer.from('aaaa00a').indexOf('3030', 'hex'), 4)
+
+ {
+ // test usc2 encoding
+ const twoByteString = Buffer.from('\u039a\u0391\u03a3\u03a3\u0395', 'ucs2')
+
+ t.equal(8, twoByteString.indexOf('\u0395', 4, 'ucs2'))
+ t.equal(6, twoByteString.indexOf('\u03a3', -4, 'ucs2'))
+ t.equal(4, twoByteString.indexOf('\u03a3', -6, 'ucs2'))
+ t.equal(4, twoByteString.indexOf(
+ Buffer.from('\u03a3', 'ucs2'), -6, 'ucs2'))
+ t.equal(-1, twoByteString.indexOf('\u03a3', -2, 'ucs2'))
+ }
+
+ const mixedByteStringUcs2 =
+ Buffer.from('\u039a\u0391abc\u03a3\u03a3\u0395', 'ucs2')
+
+ t.equal(6, mixedByteStringUcs2.indexOf('bc', 0, 'ucs2'))
+ t.equal(10, mixedByteStringUcs2.indexOf('\u03a3', 0, 'ucs2'))
+ t.equal(-1, mixedByteStringUcs2.indexOf('\u0396', 0, 'ucs2'))
+
+ t.equal(
+ 6, mixedByteStringUcs2.indexOf(Buffer.from('bc', 'ucs2'), 0, 'ucs2'))
+ t.equal(
+ 10, mixedByteStringUcs2.indexOf(Buffer.from('\u03a3', 'ucs2'), 0, 'ucs2'))
+ t.equal(
+ -1, mixedByteStringUcs2.indexOf(Buffer.from('\u0396', 'ucs2'), 0, 'ucs2'))
+
+ {
+ const twoByteString = Buffer.from('\u039a\u0391\u03a3\u03a3\u0395', 'ucs2')
+
+ // Test single char pattern
+ t.equal(0, twoByteString.indexOf('\u039a', 0, 'ucs2'))
+ let index = twoByteString.indexOf('\u0391', 0, 'ucs2')
+ t.equal(2, index, `Alpha - at index ${index}`)
+ index = twoByteString.indexOf('\u03a3', 0, 'ucs2')
+ t.equal(4, index, `First Sigma - at index ${index}`)
+ index = twoByteString.indexOf('\u03a3', 6, 'ucs2')
+ t.equal(6, index, `Second Sigma - at index ${index}`)
+ index = twoByteString.indexOf('\u0395', 0, 'ucs2')
+ t.equal(8, index, `Epsilon - at index ${index}`)
+ index = twoByteString.indexOf('\u0392', 0, 'ucs2')
+ t.equal(-1, index, `Not beta - at index ${index}`)
+
+ // Test multi-char pattern
+ index = twoByteString.indexOf('\u039a\u0391', 0, 'ucs2')
+ t.equal(0, index, `Lambda Alpha - at index ${index}`)
+ index = twoByteString.indexOf('\u0391\u03a3', 0, 'ucs2')
+ t.equal(2, index, `Alpha Sigma - at index ${index}`)
+ index = twoByteString.indexOf('\u03a3\u03a3', 0, 'ucs2')
+ t.equal(4, index, `Sigma Sigma - at index ${index}`)
+ index = twoByteString.indexOf('\u03a3\u0395', 0, 'ucs2')
+ t.equal(6, index, `Sigma Epsilon - at index ${index}`)
+ }
+
+ const mixedByteStringUtf8 = Buffer.from('\u039a\u0391abc\u03a3\u03a3\u0395')
+
+ t.equal(5, mixedByteStringUtf8.indexOf('bc'))
+ t.equal(5, mixedByteStringUtf8.indexOf('bc', 5))
+ t.equal(5, mixedByteStringUtf8.indexOf('bc', -8))
+ t.equal(7, mixedByteStringUtf8.indexOf('\u03a3'))
+ t.equal(-1, mixedByteStringUtf8.indexOf('\u0396'))
+
+ // Test complex string indexOf algorithms. Only trigger for long strings.
+ // Long string that isn't a simple repeat of a shorter string.
+ let longString = 'A'
+ for (let i = 66; i < 76; i++) { // from 'B' to 'K'
+ longString = longString + String.fromCharCode(i) + longString
+ }
+
+ const longBufferString = Buffer.from(longString)
+
+ // pattern of 15 chars, repeated every 16 chars in long
+ let pattern = 'ABACABADABACABA'
+ for (let i = 0; i < longBufferString.length - pattern.length; i += 7) {
+ const index = longBufferString.indexOf(pattern, i)
+ t.equal((i + 15) & ~0xf, index,
+ `Long ABACABA...-string at index ${i}`)
+ }
+
+ let index = longBufferString.indexOf('AJABACA')
+ t.equal(510, index, `Long AJABACA, First J - at index ${index}`)
+ index = longBufferString.indexOf('AJABACA', 511)
+ t.equal(1534, index, `Long AJABACA, Second J - at index ${index}`)
+
+ pattern = 'JABACABADABACABA'
+ index = longBufferString.indexOf(pattern)
+ t.equal(511, index, `Long JABACABA..., First J - at index ${index}`)
+ index = longBufferString.indexOf(pattern, 512)
+ t.equal(
+ 1535, index, `Long JABACABA..., Second J - at index ${index}`)
+
+ // Search for a non-ASCII string in a pure ASCII string.
+ const asciiString = Buffer.from(
+ 'somethingnotatallsinisterwhichalsoworks')
+ t.equal(-1, asciiString.indexOf('\x2061'))
+ t.equal(3, asciiString.indexOf('eth', 0))
+
+ // Search in string containing many non-ASCII chars.
+ const allCodePoints = []
+ for (let i = 0; i < 65536; i++) {
+ allCodePoints[i] = i
+ }
+
+ const allCharsString = String.fromCharCode.apply(String, allCodePoints)
+ const allCharsBufferUtf8 = Buffer.from(allCharsString)
+ const allCharsBufferUcs2 = Buffer.from(allCharsString, 'ucs2')
+
+ // Search for string long enough to trigger complex search with ASCII pattern
+ // and UC16 subject.
+ t.equal(-1, allCharsBufferUtf8.indexOf('notfound'))
+ t.equal(-1, allCharsBufferUcs2.indexOf('notfound'))
+
+ // Needle is longer than haystack, but only because it's encoded as UTF-16
+ t.equal(Buffer.from('aaaa').indexOf('a'.repeat(4), 'ucs2'), -1)
+
+ t.equal(Buffer.from('aaaa').indexOf('a'.repeat(4), 'utf8'), 0)
+ t.equal(Buffer.from('aaaa').indexOf('你好', 'ucs2'), -1)
+
+ // Haystack has odd length, but the needle is UCS2.
+ t.equal(Buffer.from('aaaaa').indexOf('b', 'ucs2'), -1)
+
+ {
+ // Find substrings in Utf8.
+ const lengths = [1, 3, 15] // Single char, simple and complex.
+ const indices = [0x5, 0x60, 0x400, 0x680, 0x7ee, 0xFF02, 0x16610, 0x2f77b]
+ for (let lengthIndex = 0; lengthIndex < lengths.length; lengthIndex++) {
+ for (let i = 0; i < indices.length; i++) {
+ const index = indices[i]
+ let length = lengths[lengthIndex]
+
+ if (index + length > 0x7F) {
+ length = 2 * length
+ }
+
+ if (index + length > 0x7FF) {
+ length = 3 * length
+ }
+
+ if (index + length > 0xFFFF) {
+ length = 4 * length
+ }
+
+ const patternBufferUtf8 = allCharsBufferUtf8.slice(index, index + length)
+ t.equal(index, allCharsBufferUtf8.indexOf(patternBufferUtf8))
+
+ const patternStringUtf8 = patternBufferUtf8.toString()
+ t.equal(index, allCharsBufferUtf8.indexOf(patternStringUtf8))
+ }
+ }
+ }
+
+ {
+ // Find substrings in Usc2.
+ const lengths = [2, 4, 16] // Single char, simple and complex.
+ const indices = [0x5, 0x65, 0x105, 0x205, 0x285, 0x2005, 0x2085, 0xfff0]
+
+ for (let lengthIndex = 0; lengthIndex < lengths.length; lengthIndex++) {
+ for (let i = 0; i < indices.length; i++) {
+ const index = indices[i] * 2
+ const length = lengths[lengthIndex]
+
+ const patternBufferUcs2 =
+ allCharsBufferUcs2.slice(index, index + length)
+ t.equal(
+ index, allCharsBufferUcs2.indexOf(patternBufferUcs2, 0, 'ucs2'))
+
+ const patternStringUcs2 = patternBufferUcs2.toString('ucs2')
+ t.equal(
+ index, allCharsBufferUcs2.indexOf(patternStringUcs2, 0, 'ucs2'))
+ }
+ }
+ }
+
+ [
+ () => {},
+ {},
+ []
+ ].forEach((val) => {
+ t.throws(() => b.indexOf(val), TypeError, `"${JSON.stringify(val)}" should throw`)
+ })
+
+ // Test weird offset arguments.
+ // The following offsets coerce to NaN or 0, searching the whole Buffer
+ t.equal(b.indexOf('b', undefined), 1)
+ t.equal(b.indexOf('b', {}), 1)
+ t.equal(b.indexOf('b', 0), 1)
+ t.equal(b.indexOf('b', null), 1)
+ t.equal(b.indexOf('b', []), 1)
+
+ // The following offset coerces to 2, in other words +[2] === 2
+ t.equal(b.indexOf('b', [2]), -1)
+
+ // Behavior should match String.indexOf()
+ t.equal(
+ b.indexOf('b', undefined),
+ stringComparison.indexOf('b', undefined))
+ t.equal(
+ b.indexOf('b', {}),
+ stringComparison.indexOf('b', {}))
+ t.equal(
+ b.indexOf('b', 0),
+ stringComparison.indexOf('b', 0))
+ t.equal(
+ b.indexOf('b', null),
+ stringComparison.indexOf('b', null))
+ t.equal(
+ b.indexOf('b', []),
+ stringComparison.indexOf('b', []))
+ t.equal(
+ b.indexOf('b', [2]),
+ stringComparison.indexOf('b', [2]))
+
+ // test truncation of Number arguments to uint8
+ {
+ const buf = Buffer.from('this is a test')
+
+ t.equal(buf.indexOf(0x6973), 3)
+ t.equal(buf.indexOf(0x697320), 4)
+ t.equal(buf.indexOf(0x69732069), 2)
+ t.equal(buf.indexOf(0x697374657374), 0)
+ t.equal(buf.indexOf(0x69737374), 0)
+ t.equal(buf.indexOf(0x69737465), 11)
+ t.equal(buf.indexOf(0x69737465), 11)
+ t.equal(buf.indexOf(-140), 0)
+ t.equal(buf.indexOf(-152), 1)
+ t.equal(buf.indexOf(0xff), -1)
+ t.equal(buf.indexOf(0xffff), -1)
+ }
+
+ // Test that Uint8Array arguments are okay.
+ {
+ const needle = new Uint8Array([0x66, 0x6f, 0x6f])
+ const haystack = new BufferList(Buffer.from('a foo b foo'))
+ t.equal(haystack.indexOf(needle), 2)
+ }
+
+ t.end()
+})
diff --git a/node_modules/bl/test/isBufferList.js b/node_modules/bl/test/isBufferList.js
new file mode 100644
index 0000000000..9d895d59b3
--- /dev/null
+++ b/node_modules/bl/test/isBufferList.js
@@ -0,0 +1,32 @@
+'use strict'
+
+const tape = require('tape')
+const { BufferList, BufferListStream } = require('../')
+const { Buffer } = require('buffer')
+
+tape('isBufferList positives', (t) => {
+ t.ok(BufferList.isBufferList(new BufferList()))
+ t.ok(BufferList.isBufferList(new BufferListStream()))
+
+ t.end()
+})
+
+tape('isBufferList negatives', (t) => {
+ const types = [
+ null,
+ undefined,
+ NaN,
+ true,
+ false,
+ {},
+ [],
+ Buffer.alloc(0),
+ [Buffer.alloc(0)]
+ ]
+
+ for (const obj of types) {
+ t.notOk(BufferList.isBufferList(obj))
+ }
+
+ t.end()
+})
diff --git a/node_modules/bl/test/test.js b/node_modules/bl/test/test.js
new file mode 100644
index 0000000000..e523d0c3f2
--- /dev/null
+++ b/node_modules/bl/test/test.js
@@ -0,0 +1,869 @@
+'use strict'
+
+const tape = require('tape')
+const crypto = require('crypto')
+const fs = require('fs')
+const path = require('path')
+const BufferList = require('../')
+const { Buffer } = require('buffer')
+
+const encodings =
+ ('hex utf8 utf-8 ascii binary base64' +
+ (process.browser ? '' : ' ucs2 ucs-2 utf16le utf-16le')).split(' ')
+
+require('./indexOf')
+require('./isBufferList')
+require('./convert')
+
+tape('single bytes from single buffer', function (t) {
+ const bl = new BufferList()
+
+ bl.append(Buffer.from('abcd'))
+
+ t.equal(bl.length, 4)
+ t.equal(bl.get(-1), undefined)
+ t.equal(bl.get(0), 97)
+ t.equal(bl.get(1), 98)
+ t.equal(bl.get(2), 99)
+ t.equal(bl.get(3), 100)
+ t.equal(bl.get(4), undefined)
+
+ t.end()
+})
+
+tape('single bytes from multiple buffers', function (t) {
+ const bl = new BufferList()
+
+ bl.append(Buffer.from('abcd'))
+ bl.append(Buffer.from('efg'))
+ bl.append(Buffer.from('hi'))
+ bl.append(Buffer.from('j'))
+
+ t.equal(bl.length, 10)
+
+ t.equal(bl.get(0), 97)
+ t.equal(bl.get(1), 98)
+ t.equal(bl.get(2), 99)
+ t.equal(bl.get(3), 100)
+ t.equal(bl.get(4), 101)
+ t.equal(bl.get(5), 102)
+ t.equal(bl.get(6), 103)
+ t.equal(bl.get(7), 104)
+ t.equal(bl.get(8), 105)
+ t.equal(bl.get(9), 106)
+
+ t.end()
+})
+
+tape('multi bytes from single buffer', function (t) {
+ const bl = new BufferList()
+
+ bl.append(Buffer.from('abcd'))
+
+ t.equal(bl.length, 4)
+
+ t.equal(bl.slice(0, 4).toString('ascii'), 'abcd')
+ t.equal(bl.slice(0, 3).toString('ascii'), 'abc')
+ t.equal(bl.slice(1, 4).toString('ascii'), 'bcd')
+ t.equal(bl.slice(-4, -1).toString('ascii'), 'abc')
+
+ t.end()
+})
+
+tape('multi bytes from single buffer (negative indexes)', function (t) {
+ const bl = new BufferList()
+
+ bl.append(Buffer.from('buffer'))
+
+ t.equal(bl.length, 6)
+
+ t.equal(bl.slice(-6, -1).toString('ascii'), 'buffe')
+ t.equal(bl.slice(-6, -2).toString('ascii'), 'buff')
+ t.equal(bl.slice(-5, -2).toString('ascii'), 'uff')
+
+ t.end()
+})
+
+tape('multiple bytes from multiple buffers', function (t) {
+ const bl = new BufferList()
+
+ bl.append(Buffer.from('abcd'))
+ bl.append(Buffer.from('efg'))
+ bl.append(Buffer.from('hi'))
+ bl.append(Buffer.from('j'))
+
+ t.equal(bl.length, 10)
+
+ t.equal(bl.slice(0, 10).toString('ascii'), 'abcdefghij')
+ t.equal(bl.slice(3, 10).toString('ascii'), 'defghij')
+ t.equal(bl.slice(3, 6).toString('ascii'), 'def')
+ t.equal(bl.slice(3, 8).toString('ascii'), 'defgh')
+ t.equal(bl.slice(5, 10).toString('ascii'), 'fghij')
+ t.equal(bl.slice(-7, -4).toString('ascii'), 'def')
+
+ t.end()
+})
+
+tape('multiple bytes from multiple buffer lists', function (t) {
+ const bl = new BufferList()
+
+ bl.append(new BufferList([Buffer.from('abcd'), Buffer.from('efg')]))
+ bl.append(new BufferList([Buffer.from('hi'), Buffer.from('j')]))
+
+ t.equal(bl.length, 10)
+
+ t.equal(bl.slice(0, 10).toString('ascii'), 'abcdefghij')
+
+ t.equal(bl.slice(3, 10).toString('ascii'), 'defghij')
+ t.equal(bl.slice(3, 6).toString('ascii'), 'def')
+ t.equal(bl.slice(3, 8).toString('ascii'), 'defgh')
+ t.equal(bl.slice(5, 10).toString('ascii'), 'fghij')
+
+ t.end()
+})
+
+// same data as previous test, just using nested constructors
+tape('multiple bytes from crazy nested buffer lists', function (t) {
+ const bl = new BufferList()
+
+ bl.append(new BufferList([
+ new BufferList([
+ new BufferList(Buffer.from('abc')),
+ Buffer.from('d'),
+ new BufferList(Buffer.from('efg'))
+ ]),
+ new BufferList([Buffer.from('hi')]),
+ new BufferList(Buffer.from('j'))
+ ]))
+
+ t.equal(bl.length, 10)
+
+ t.equal(bl.slice(0, 10).toString('ascii'), 'abcdefghij')
+
+ t.equal(bl.slice(3, 10).toString('ascii'), 'defghij')
+ t.equal(bl.slice(3, 6).toString('ascii'), 'def')
+ t.equal(bl.slice(3, 8).toString('ascii'), 'defgh')
+ t.equal(bl.slice(5, 10).toString('ascii'), 'fghij')
+
+ t.end()
+})
+
+tape('append accepts arrays of Buffers', function (t) {
+ const bl = new BufferList()
+
+ bl.append(Buffer.from('abc'))
+ bl.append([Buffer.from('def')])
+ bl.append([Buffer.from('ghi'), Buffer.from('jkl')])
+ bl.append([Buffer.from('mnop'), Buffer.from('qrstu'), Buffer.from('vwxyz')])
+ t.equal(bl.length, 26)
+ t.equal(bl.slice().toString('ascii'), 'abcdefghijklmnopqrstuvwxyz')
+
+ t.end()
+})
+
+tape('append accepts arrays of Uint8Arrays', function (t) {
+ const bl = new BufferList()
+
+ bl.append(new Uint8Array([97, 98, 99]))
+ bl.append([Uint8Array.from([100, 101, 102])])
+ bl.append([new Uint8Array([103, 104, 105]), new Uint8Array([106, 107, 108])])
+ bl.append([new Uint8Array([109, 110, 111, 112]), new Uint8Array([113, 114, 115, 116, 117]), new Uint8Array([118, 119, 120, 121, 122])])
+ t.equal(bl.length, 26)
+ t.equal(bl.slice().toString('ascii'), 'abcdefghijklmnopqrstuvwxyz')
+
+ t.end()
+})
+
+tape('append accepts arrays of BufferLists', function (t) {
+ const bl = new BufferList()
+
+ bl.append(Buffer.from('abc'))
+ bl.append([new BufferList('def')])
+ bl.append(new BufferList([Buffer.from('ghi'), new BufferList('jkl')]))
+ bl.append([Buffer.from('mnop'), new BufferList([Buffer.from('qrstu'), Buffer.from('vwxyz')])])
+ t.equal(bl.length, 26)
+ t.equal(bl.slice().toString('ascii'), 'abcdefghijklmnopqrstuvwxyz')
+
+ t.end()
+})
+
+tape('append chainable', function (t) {
+ const bl = new BufferList()
+
+ t.ok(bl.append(Buffer.from('abcd')) === bl)
+ t.ok(bl.append([Buffer.from('abcd')]) === bl)
+ t.ok(bl.append(new BufferList(Buffer.from('abcd'))) === bl)
+ t.ok(bl.append([new BufferList(Buffer.from('abcd'))]) === bl)
+
+ t.end()
+})
+
+tape('append chainable (test results)', function (t) {
+ const bl = new BufferList('abc')
+ .append([new BufferList('def')])
+ .append(new BufferList([Buffer.from('ghi'), new BufferList('jkl')]))
+ .append([Buffer.from('mnop'), new BufferList([Buffer.from('qrstu'), Buffer.from('vwxyz')])])
+
+ t.equal(bl.length, 26)
+ t.equal(bl.slice().toString('ascii'), 'abcdefghijklmnopqrstuvwxyz')
+
+ t.end()
+})
+
+tape('consuming from multiple buffers', function (t) {
+ const bl = new BufferList()
+
+ bl.append(Buffer.from('abcd'))
+ bl.append(Buffer.from('efg'))
+ bl.append(Buffer.from('hi'))
+ bl.append(Buffer.from('j'))
+
+ t.equal(bl.length, 10)
+
+ t.equal(bl.slice(0, 10).toString('ascii'), 'abcdefghij')
+
+ bl.consume(3)
+ t.equal(bl.length, 7)
+ t.equal(bl.slice(0, 7).toString('ascii'), 'defghij')
+
+ bl.consume(2)
+ t.equal(bl.length, 5)
+ t.equal(bl.slice(0, 5).toString('ascii'), 'fghij')
+
+ bl.consume(1)
+ t.equal(bl.length, 4)
+ t.equal(bl.slice(0, 4).toString('ascii'), 'ghij')
+
+ bl.consume(1)
+ t.equal(bl.length, 3)
+ t.equal(bl.slice(0, 3).toString('ascii'), 'hij')
+
+ bl.consume(2)
+ t.equal(bl.length, 1)
+ t.equal(bl.slice(0, 1).toString('ascii'), 'j')
+
+ t.end()
+})
+
+tape('complete consumption', function (t) {
+ const bl = new BufferList()
+
+ bl.append(Buffer.from('a'))
+ bl.append(Buffer.from('b'))
+
+ bl.consume(2)
+
+ t.equal(bl.length, 0)
+ t.equal(bl._bufs.length, 0)
+
+ t.end()
+})
+
+tape('test readUInt8 / readInt8', function (t) {
+ const buf1 = Buffer.alloc(1)
+ const buf2 = Buffer.alloc(3)
+ const buf3 = Buffer.alloc(3)
+ const bl = new BufferList()
+
+ buf1[0] = 0x1
+ buf2[1] = 0x3
+ buf2[2] = 0x4
+ buf3[0] = 0x23
+ buf3[1] = 0x42
+
+ bl.append(buf1)
+ bl.append(buf2)
+ bl.append(buf3)
+
+ t.equal(bl.readUInt8(), 0x1)
+ t.equal(bl.readUInt8(2), 0x3)
+ t.equal(bl.readInt8(2), 0x3)
+ t.equal(bl.readUInt8(3), 0x4)
+ t.equal(bl.readInt8(3), 0x4)
+ t.equal(bl.readUInt8(4), 0x23)
+ t.equal(bl.readInt8(4), 0x23)
+ t.equal(bl.readUInt8(5), 0x42)
+ t.equal(bl.readInt8(5), 0x42)
+
+ t.end()
+})
+
+tape('test readUInt16LE / readUInt16BE / readInt16LE / readInt16BE', function (t) {
+ const buf1 = Buffer.alloc(1)
+ const buf2 = Buffer.alloc(3)
+ const buf3 = Buffer.alloc(3)
+ const bl = new BufferList()
+
+ buf1[0] = 0x1
+ buf2[1] = 0x3
+ buf2[2] = 0x4
+ buf3[0] = 0x23
+ buf3[1] = 0x42
+
+ bl.append(buf1)
+ bl.append(buf2)
+ bl.append(buf3)
+
+ t.equal(bl.readUInt16BE(), 0x0100)
+ t.equal(bl.readUInt16LE(), 0x0001)
+ t.equal(bl.readUInt16BE(2), 0x0304)
+ t.equal(bl.readUInt16LE(2), 0x0403)
+ t.equal(bl.readInt16BE(2), 0x0304)
+ t.equal(bl.readInt16LE(2), 0x0403)
+ t.equal(bl.readUInt16BE(3), 0x0423)
+ t.equal(bl.readUInt16LE(3), 0x2304)
+ t.equal(bl.readInt16BE(3), 0x0423)
+ t.equal(bl.readInt16LE(3), 0x2304)
+ t.equal(bl.readUInt16BE(4), 0x2342)
+ t.equal(bl.readUInt16LE(4), 0x4223)
+ t.equal(bl.readInt16BE(4), 0x2342)
+ t.equal(bl.readInt16LE(4), 0x4223)
+
+ t.end()
+})
+
+tape('test readUInt32LE / readUInt32BE / readInt32LE / readInt32BE', function (t) {
+ const buf1 = Buffer.alloc(1)
+ const buf2 = Buffer.alloc(3)
+ const buf3 = Buffer.alloc(3)
+ const bl = new BufferList()
+
+ buf1[0] = 0x1
+ buf2[1] = 0x3
+ buf2[2] = 0x4
+ buf3[0] = 0x23
+ buf3[1] = 0x42
+
+ bl.append(buf1)
+ bl.append(buf2)
+ bl.append(buf3)
+
+ t.equal(bl.readUInt32BE(), 0x01000304)
+ t.equal(bl.readUInt32LE(), 0x04030001)
+ t.equal(bl.readUInt32BE(2), 0x03042342)
+ t.equal(bl.readUInt32LE(2), 0x42230403)
+ t.equal(bl.readInt32BE(2), 0x03042342)
+ t.equal(bl.readInt32LE(2), 0x42230403)
+
+ t.end()
+})
+
+tape('test readUIntLE / readUIntBE / readIntLE / readIntBE', function (t) {
+ const buf1 = Buffer.alloc(1)
+ const buf2 = Buffer.alloc(3)
+ const buf3 = Buffer.alloc(3)
+ const bl = new BufferList()
+
+ buf2[0] = 0x2
+ buf2[1] = 0x3
+ buf2[2] = 0x4
+ buf3[0] = 0x23
+ buf3[1] = 0x42
+ buf3[2] = 0x61
+
+ bl.append(buf1)
+ bl.append(buf2)
+ bl.append(buf3)
+
+ t.equal(bl.readUIntBE(1, 1), 0x02)
+ t.equal(bl.readUIntBE(1, 2), 0x0203)
+ t.equal(bl.readUIntBE(1, 3), 0x020304)
+ t.equal(bl.readUIntBE(1, 4), 0x02030423)
+ t.equal(bl.readUIntBE(1, 5), 0x0203042342)
+ t.equal(bl.readUIntBE(1, 6), 0x020304234261)
+ t.equal(bl.readUIntLE(1, 1), 0x02)
+ t.equal(bl.readUIntLE(1, 2), 0x0302)
+ t.equal(bl.readUIntLE(1, 3), 0x040302)
+ t.equal(bl.readUIntLE(1, 4), 0x23040302)
+ t.equal(bl.readUIntLE(1, 5), 0x4223040302)
+ t.equal(bl.readUIntLE(1, 6), 0x614223040302)
+ t.equal(bl.readIntBE(1, 1), 0x02)
+ t.equal(bl.readIntBE(1, 2), 0x0203)
+ t.equal(bl.readIntBE(1, 3), 0x020304)
+ t.equal(bl.readIntBE(1, 4), 0x02030423)
+ t.equal(bl.readIntBE(1, 5), 0x0203042342)
+ t.equal(bl.readIntBE(1, 6), 0x020304234261)
+ t.equal(bl.readIntLE(1, 1), 0x02)
+ t.equal(bl.readIntLE(1, 2), 0x0302)
+ t.equal(bl.readIntLE(1, 3), 0x040302)
+ t.equal(bl.readIntLE(1, 4), 0x23040302)
+ t.equal(bl.readIntLE(1, 5), 0x4223040302)
+ t.equal(bl.readIntLE(1, 6), 0x614223040302)
+
+ t.end()
+})
+
+tape('test readFloatLE / readFloatBE', function (t) {
+ const buf1 = Buffer.alloc(1)
+ const buf2 = Buffer.alloc(3)
+ const buf3 = Buffer.alloc(3)
+ const bl = new BufferList()
+
+ buf1[0] = 0x01
+ buf2[1] = 0x00
+ buf2[2] = 0x00
+ buf3[0] = 0x80
+ buf3[1] = 0x3f
+
+ bl.append(buf1)
+ bl.append(buf2)
+ bl.append(buf3)
+
+ const canonical = Buffer.concat([buf1, buf2, buf3])
+ t.equal(bl.readFloatLE(), canonical.readFloatLE())
+ t.equal(bl.readFloatBE(), canonical.readFloatBE())
+ t.equal(bl.readFloatLE(2), canonical.readFloatLE(2))
+ t.equal(bl.readFloatBE(2), canonical.readFloatBE(2))
+
+ t.end()
+})
+
+tape('test readDoubleLE / readDoubleBE', function (t) {
+ const buf1 = Buffer.alloc(1)
+ const buf2 = Buffer.alloc(3)
+ const buf3 = Buffer.alloc(10)
+ const bl = new BufferList()
+
+ buf1[0] = 0x01
+ buf2[1] = 0x55
+ buf2[2] = 0x55
+ buf3[0] = 0x55
+ buf3[1] = 0x55
+ buf3[2] = 0x55
+ buf3[3] = 0x55
+ buf3[4] = 0xd5
+ buf3[5] = 0x3f
+
+ bl.append(buf1)
+ bl.append(buf2)
+ bl.append(buf3)
+
+ const canonical = Buffer.concat([buf1, buf2, buf3])
+ t.equal(bl.readDoubleBE(), canonical.readDoubleBE())
+ t.equal(bl.readDoubleLE(), canonical.readDoubleLE())
+ t.equal(bl.readDoubleBE(2), canonical.readDoubleBE(2))
+ t.equal(bl.readDoubleLE(2), canonical.readDoubleLE(2))
+
+ t.end()
+})
+
+tape('test toString', function (t) {
+ const bl = new BufferList()
+
+ bl.append(Buffer.from('abcd'))
+ bl.append(Buffer.from('efg'))
+ bl.append(Buffer.from('hi'))
+ bl.append(Buffer.from('j'))
+
+ t.equal(bl.toString('ascii', 0, 10), 'abcdefghij')
+ t.equal(bl.toString('ascii', 3, 10), 'defghij')
+ t.equal(bl.toString('ascii', 3, 6), 'def')
+ t.equal(bl.toString('ascii', 3, 8), 'defgh')
+ t.equal(bl.toString('ascii', 5, 10), 'fghij')
+
+ t.end()
+})
+
+tape('test toString encoding', function (t) {
+ const bl = new BufferList()
+ const b = Buffer.from('abcdefghij\xff\x00')
+
+ bl.append(Buffer.from('abcd'))
+ bl.append(Buffer.from('efg'))
+ bl.append(Buffer.from('hi'))
+ bl.append(Buffer.from('j'))
+ bl.append(Buffer.from('\xff\x00'))
+
+ encodings.forEach(function (enc) {
+ t.equal(bl.toString(enc), b.toString(enc), enc)
+ })
+
+ t.end()
+})
+
+tape('uninitialized memory', function (t) {
+ const secret = crypto.randomBytes(256)
+ for (let i = 0; i < 1e6; i++) {
+ const clone = Buffer.from(secret)
+ const bl = new BufferList()
+ bl.append(Buffer.from('a'))
+ bl.consume(-1024)
+ const buf = bl.slice(1)
+ if (buf.indexOf(clone) !== -1) {
+ t.fail(`Match (at ${i})`)
+ break
+ }
+ }
+ t.end()
+})
+
+!process.browser && tape('test stream', function (t) {
+ const random = crypto.randomBytes(65534)
+
+ const bl = new BufferList((err, buf) => {
+ t.ok(Buffer.isBuffer(buf))
+ t.ok(err === null)
+ t.ok(random.equals(bl.slice()))
+ t.ok(random.equals(buf.slice()))
+
+ bl.pipe(fs.createWriteStream('/tmp/bl_test_rnd_out.dat'))
+ .on('close', function () {
+ const rndhash = crypto.createHash('md5').update(random).digest('hex')
+ const md5sum = crypto.createHash('md5')
+ const s = fs.createReadStream('/tmp/bl_test_rnd_out.dat')
+
+ s.on('data', md5sum.update.bind(md5sum))
+ s.on('end', function () {
+ t.equal(rndhash, md5sum.digest('hex'), 'woohoo! correct hash!')
+ t.end()
+ })
+ })
+ })
+
+ fs.writeFileSync('/tmp/bl_test_rnd.dat', random)
+ fs.createReadStream('/tmp/bl_test_rnd.dat').pipe(bl)
+})
+
+tape('instantiation with Buffer', function (t) {
+ const buf = crypto.randomBytes(1024)
+ const buf2 = crypto.randomBytes(1024)
+ let b = BufferList(buf)
+
+ t.equal(buf.toString('hex'), b.slice().toString('hex'), 'same buffer')
+ b = BufferList([buf, buf2])
+ t.equal(b.slice().toString('hex'), Buffer.concat([buf, buf2]).toString('hex'), 'same buffer')
+
+ t.end()
+})
+
+tape('test String appendage', function (t) {
+ const bl = new BufferList()
+ const b = Buffer.from('abcdefghij\xff\x00')
+
+ bl.append('abcd')
+ bl.append('efg')
+ bl.append('hi')
+ bl.append('j')
+ bl.append('\xff\x00')
+
+ encodings.forEach(function (enc) {
+ t.equal(bl.toString(enc), b.toString(enc))
+ })
+
+ t.end()
+})
+
+tape('test Number appendage', function (t) {
+ const bl = new BufferList()
+ const b = Buffer.from('1234567890')
+
+ bl.append(1234)
+ bl.append(567)
+ bl.append(89)
+ bl.append(0)
+
+ encodings.forEach(function (enc) {
+ t.equal(bl.toString(enc), b.toString(enc))
+ })
+
+ t.end()
+})
+
+tape('write nothing, should get empty buffer', function (t) {
+ t.plan(3)
+ BufferList(function (err, data) {
+ t.notOk(err, 'no error')
+ t.ok(Buffer.isBuffer(data), 'got a buffer')
+ t.equal(0, data.length, 'got a zero-length buffer')
+ t.end()
+ }).end()
+})
+
+tape('unicode string', function (t) {
+ t.plan(2)
+
+ const inp1 = '\u2600'
+ const inp2 = '\u2603'
+ const exp = inp1 + ' and ' + inp2
+ const bl = BufferList()
+
+ bl.write(inp1)
+ bl.write(' and ')
+ bl.write(inp2)
+ t.equal(exp, bl.toString())
+ t.equal(Buffer.from(exp).toString('hex'), bl.toString('hex'))
+})
+
+tape('should emit finish', function (t) {
+ const source = BufferList()
+ const dest = BufferList()
+
+ source.write('hello')
+ source.pipe(dest)
+
+ dest.on('finish', function () {
+ t.equal(dest.toString('utf8'), 'hello')
+ t.end()
+ })
+})
+
+tape('basic copy', function (t) {
+ const buf = crypto.randomBytes(1024)
+ const buf2 = Buffer.alloc(1024)
+ const b = BufferList(buf)
+
+ b.copy(buf2)
+ t.equal(b.slice().toString('hex'), buf2.toString('hex'), 'same buffer')
+
+ t.end()
+})
+
+tape('copy after many appends', function (t) {
+ const buf = crypto.randomBytes(512)
+ const buf2 = Buffer.alloc(1024)
+ const b = BufferList(buf)
+
+ b.append(buf)
+ b.copy(buf2)
+ t.equal(b.slice().toString('hex'), buf2.toString('hex'), 'same buffer')
+
+ t.end()
+})
+
+tape('copy at a precise position', function (t) {
+ const buf = crypto.randomBytes(1004)
+ const buf2 = Buffer.alloc(1024)
+ const b = BufferList(buf)
+
+ b.copy(buf2, 20)
+ t.equal(b.slice().toString('hex'), buf2.slice(20).toString('hex'), 'same buffer')
+
+ t.end()
+})
+
+tape('copy starting from a precise location', function (t) {
+ const buf = crypto.randomBytes(10)
+ const buf2 = Buffer.alloc(5)
+ const b = BufferList(buf)
+
+ b.copy(buf2, 0, 5)
+ t.equal(b.slice(5).toString('hex'), buf2.toString('hex'), 'same buffer')
+
+ t.end()
+})
+
+tape('copy in an interval', function (t) {
+ const rnd = crypto.randomBytes(10)
+ const b = BufferList(rnd) // put the random bytes there
+ const actual = Buffer.alloc(3)
+ const expected = Buffer.alloc(3)
+
+ rnd.copy(expected, 0, 5, 8)
+ b.copy(actual, 0, 5, 8)
+
+ t.equal(actual.toString('hex'), expected.toString('hex'), 'same buffer')
+
+ t.end()
+})
+
+tape('copy an interval between two buffers', function (t) {
+ const buf = crypto.randomBytes(10)
+ const buf2 = Buffer.alloc(10)
+ const b = BufferList(buf)
+
+ b.append(buf)
+ b.copy(buf2, 0, 5, 15)
+
+ t.equal(b.slice(5, 15).toString('hex'), buf2.toString('hex'), 'same buffer')
+
+ t.end()
+})
+
+tape('shallow slice across buffer boundaries', function (t) {
+ const bl = new BufferList(['First', 'Second', 'Third'])
+
+ t.equal(bl.shallowSlice(3, 13).toString(), 'stSecondTh')
+
+ t.end()
+})
+
+tape('shallow slice within single buffer', function (t) {
+ t.plan(2)
+
+ const bl = new BufferList(['First', 'Second', 'Third'])
+
+ t.equal(bl.shallowSlice(5, 10).toString(), 'Secon')
+ t.equal(bl.shallowSlice(7, 10).toString(), 'con')
+
+ t.end()
+})
+
+tape('shallow slice single buffer', function (t) {
+ t.plan(3)
+
+ const bl = new BufferList(['First', 'Second', 'Third'])
+
+ t.equal(bl.shallowSlice(0, 5).toString(), 'First')
+ t.equal(bl.shallowSlice(5, 11).toString(), 'Second')
+ t.equal(bl.shallowSlice(11, 16).toString(), 'Third')
+})
+
+tape('shallow slice with negative or omitted indices', function (t) {
+ t.plan(4)
+
+ const bl = new BufferList(['First', 'Second', 'Third'])
+
+ t.equal(bl.shallowSlice().toString(), 'FirstSecondThird')
+ t.equal(bl.shallowSlice(5).toString(), 'SecondThird')
+ t.equal(bl.shallowSlice(5, -3).toString(), 'SecondTh')
+ t.equal(bl.shallowSlice(-8).toString(), 'ondThird')
+})
+
+tape('shallow slice does not make a copy', function (t) {
+ t.plan(1)
+
+ const buffers = [Buffer.from('First'), Buffer.from('Second'), Buffer.from('Third')]
+ const bl = (new BufferList(buffers)).shallowSlice(5, -3)
+
+ buffers[1].fill('h')
+ buffers[2].fill('h')
+
+ t.equal(bl.toString(), 'hhhhhhhh')
+})
+
+tape('shallow slice with 0 length', function (t) {
+ t.plan(1)
+
+ const buffers = [Buffer.from('First'), Buffer.from('Second'), Buffer.from('Third')]
+ const bl = (new BufferList(buffers)).shallowSlice(0, 0)
+
+ t.equal(bl.length, 0)
+})
+
+tape('shallow slice with 0 length from middle', function (t) {
+ t.plan(1)
+
+ const buffers = [Buffer.from('First'), Buffer.from('Second'), Buffer.from('Third')]
+ const bl = (new BufferList(buffers)).shallowSlice(10, 10)
+
+ t.equal(bl.length, 0)
+})
+
+tape('duplicate', function (t) {
+ t.plan(2)
+
+ const bl = new BufferList('abcdefghij\xff\x00')
+ const dup = bl.duplicate()
+
+ t.equal(bl.prototype, dup.prototype)
+ t.equal(bl.toString('hex'), dup.toString('hex'))
+})
+
+tape('destroy no pipe', function (t) {
+ t.plan(2)
+
+ const bl = new BufferList('alsdkfja;lsdkfja;lsdk')
+
+ bl.destroy()
+
+ t.equal(bl._bufs.length, 0)
+ t.equal(bl.length, 0)
+})
+
+tape('destroy with error', function (t) {
+ t.plan(3)
+
+ const bl = new BufferList('alsdkfja;lsdkfja;lsdk')
+ const err = new Error('kaboom')
+
+ bl.destroy(err)
+ bl.on('error', function (_err) {
+ t.equal(_err, err)
+ })
+
+ t.equal(bl._bufs.length, 0)
+ t.equal(bl.length, 0)
+})
+
+!process.browser && tape('destroy with pipe before read end', function (t) {
+ t.plan(2)
+
+ const bl = new BufferList()
+ fs.createReadStream(path.join(__dirname, '/test.js'))
+ .pipe(bl)
+
+ bl.destroy()
+
+ t.equal(bl._bufs.length, 0)
+ t.equal(bl.length, 0)
+})
+
+!process.browser && tape('destroy with pipe before read end with race', function (t) {
+ t.plan(2)
+
+ const bl = new BufferList()
+
+ fs.createReadStream(path.join(__dirname, '/test.js'))
+ .pipe(bl)
+
+ setTimeout(function () {
+ bl.destroy()
+ setTimeout(function () {
+ t.equal(bl._bufs.length, 0)
+ t.equal(bl.length, 0)
+ }, 500)
+ }, 500)
+})
+
+!process.browser && tape('destroy with pipe after read end', function (t) {
+ t.plan(2)
+
+ const bl = new BufferList()
+
+ fs.createReadStream(path.join(__dirname, '/test.js'))
+ .on('end', onEnd)
+ .pipe(bl)
+
+ function onEnd () {
+ bl.destroy()
+
+ t.equal(bl._bufs.length, 0)
+ t.equal(bl.length, 0)
+ }
+})
+
+!process.browser && tape('destroy with pipe while writing to a destination', function (t) {
+ t.plan(4)
+
+ const bl = new BufferList()
+ const ds = new BufferList()
+
+ fs.createReadStream(path.join(__dirname, '/test.js'))
+ .on('end', onEnd)
+ .pipe(bl)
+
+ function onEnd () {
+ bl.pipe(ds)
+
+ setTimeout(function () {
+ bl.destroy()
+
+ t.equals(bl._bufs.length, 0)
+ t.equals(bl.length, 0)
+
+ ds.destroy()
+
+ t.equals(bl._bufs.length, 0)
+ t.equals(bl.length, 0)
+ }, 100)
+ }
+})
+
+!process.browser && tape('handle error', function (t) {
+ t.plan(2)
+
+ fs.createReadStream('/does/not/exist').pipe(BufferList(function (err, data) {
+ t.ok(err instanceof Error, 'has error')
+ t.notOk(data, 'no data')
+ }))
+})
diff --git a/node_modules/buffer/AUTHORS.md b/node_modules/buffer/AUTHORS.md
new file mode 100644
index 0000000000..22eb17129e
--- /dev/null
+++ b/node_modules/buffer/AUTHORS.md
@@ -0,0 +1,70 @@
+# Authors
+
+#### Ordered by first contribution.
+
+- Romain Beauxis (toots@rastageeks.org)
+- Tobias Koppers (tobias.koppers@googlemail.com)
+- Janus (ysangkok@gmail.com)
+- Rainer Dreyer (rdrey1@gmail.com)
+- Tõnis Tiigi (tonistiigi@gmail.com)
+- James Halliday (mail@substack.net)
+- Michael Williamson (mike@zwobble.org)
+- elliottcable (github@elliottcable.name)
+- rafael (rvalle@livelens.net)
+- Andrew Kelley (superjoe30@gmail.com)
+- Andreas Madsen (amwebdk@gmail.com)
+- Mike Brevoort (mike.brevoort@pearson.com)
+- Brian White (mscdex@mscdex.net)
+- Feross Aboukhadijeh (feross@feross.org)
+- Ruben Verborgh (ruben@verborgh.org)
+- eliang (eliang.cs@gmail.com)
+- Jesse Tane (jesse.tane@gmail.com)
+- Alfonso Boza (alfonso@cloud.com)
+- Mathias Buus (mathiasbuus@gmail.com)
+- Devon Govett (devongovett@gmail.com)
+- Daniel Cousens (github@dcousens.com)
+- Joseph Dykstra (josephdykstra@gmail.com)
+- Parsha Pourkhomami (parshap+git@gmail.com)
+- Damjan Košir (damjan.kosir@gmail.com)
+- daverayment (dave.rayment@gmail.com)
+- kawanet (u-suke@kawa.net)
+- Linus Unnebäck (linus@folkdatorn.se)
+- Nolan Lawson (nolan.lawson@gmail.com)
+- Calvin Metcalf (calvin.metcalf@gmail.com)
+- Koki Takahashi (hakatasiloving@gmail.com)
+- Guy Bedford (guybedford@gmail.com)
+- Jan Schär (jscissr@gmail.com)
+- RaulTsc (tomescu.raul@gmail.com)
+- Matthieu Monsch (monsch@alum.mit.edu)
+- Dan Ehrenberg (littledan@chromium.org)
+- Kirill Fomichev (fanatid@ya.ru)
+- Yusuke Kawasaki (u-suke@kawa.net)
+- DC (dcposch@dcpos.ch)
+- John-David Dalton (john.david.dalton@gmail.com)
+- adventure-yunfei (adventure030@gmail.com)
+- Emil Bay (github@tixz.dk)
+- Sam Sudar (sudar.sam@gmail.com)
+- Volker Mische (volker.mische@gmail.com)
+- David Walton (support@geekstocks.com)
+- Сковорода Никита Андреевич (chalkerx@gmail.com)
+- greenkeeper[bot] (greenkeeper[bot]@users.noreply.github.com)
+- ukstv (sergey.ukustov@machinomy.com)
+- Renée Kooi (renee@kooi.me)
+- ranbochen (ranbochen@qq.com)
+- Vladimir Borovik (bobahbdb@gmail.com)
+- greenkeeper[bot] (23040076+greenkeeper[bot]@users.noreply.github.com)
+- kumavis (aaron@kumavis.me)
+- Sergey Ukustov (sergey.ukustov@machinomy.com)
+- Fei Liu (liu.feiwood@gmail.com)
+- Blaine Bublitz (blaine.bublitz@gmail.com)
+- clement (clement@seald.io)
+- Koushik Dutta (koushd@gmail.com)
+- Jordan Harband (ljharb@gmail.com)
+- Niklas Mischkulnig (mischnic@users.noreply.github.com)
+- Nikolai Vavilov (vvnicholas@gmail.com)
+- Fedor Nezhivoi (gyzerok@users.noreply.github.com)
+- Peter Newman (peternewman@users.noreply.github.com)
+- mathmakgakpak (44949126+mathmakgakpak@users.noreply.github.com)
+- jkkang (jkkang@smartauth.kr)
+
+#### Generated by bin/update-authors.sh.
diff --git a/node_modules/buffer/LICENSE b/node_modules/buffer/LICENSE
new file mode 100644
index 0000000000..d6bf75dcf1
--- /dev/null
+++ b/node_modules/buffer/LICENSE
@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) Feross Aboukhadijeh, and other contributors.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
diff --git a/node_modules/buffer/README.md b/node_modules/buffer/README.md
new file mode 100644
index 0000000000..9a23d7cfa3
--- /dev/null
+++ b/node_modules/buffer/README.md
@@ -0,0 +1,410 @@
+# buffer [![travis][travis-image]][travis-url] [![npm][npm-image]][npm-url] [![downloads][downloads-image]][downloads-url] [![javascript style guide][standard-image]][standard-url]
+
+[travis-image]: https://img.shields.io/travis/feross/buffer/master.svg
+[travis-url]: https://travis-ci.org/feross/buffer
+[npm-image]: https://img.shields.io/npm/v/buffer.svg
+[npm-url]: https://npmjs.org/package/buffer
+[downloads-image]: https://img.shields.io/npm/dm/buffer.svg
+[downloads-url]: https://npmjs.org/package/buffer
+[standard-image]: https://img.shields.io/badge/code_style-standard-brightgreen.svg
+[standard-url]: https://standardjs.com
+
+#### The buffer module from [node.js](https://nodejs.org/), for the browser.
+
+[![saucelabs][saucelabs-image]][saucelabs-url]
+
+[saucelabs-image]: https://saucelabs.com/browser-matrix/buffer.svg
+[saucelabs-url]: https://saucelabs.com/u/buffer
+
+With [browserify](http://browserify.org), simply `require('buffer')` or use the `Buffer` global and you will get this module.
+
+The goal is to provide an API that is 100% identical to
+[node's Buffer API](https://nodejs.org/api/buffer.html). Read the
+[official docs](https://nodejs.org/api/buffer.html) for the full list of properties,
+instance methods, and class methods that are supported.
+
+## features
+
+- Manipulate binary data like a boss, in all browsers!
+- Super fast. Backed by Typed Arrays (`Uint8Array`/`ArrayBuffer`, not `Object`)
+- Extremely small bundle size (**6.75KB minified + gzipped**, 51.9KB with comments)
+- Excellent browser support (Chrome, Firefox, Edge, Safari 9+, IE 11, iOS 9+, Android, etc.)
+- Preserves Node API exactly, with one minor difference (see below)
+- Square-bracket `buf[4]` notation works!
+- Does not modify any browser prototypes or put anything on `window`
+- Comprehensive test suite (including all buffer tests from node.js core)
+
+## install
+
+To use this module directly (without browserify), install it:
+
+```bash
+npm install buffer
+```
+
+This module was previously called **native-buffer-browserify**, but please use **buffer**
+from now on.
+
+If you do not use a bundler, you can use the [standalone script](https://bundle.run/buffer).
+
+## usage
+
+The module's API is identical to node's `Buffer` API. Read the
+[official docs](https://nodejs.org/api/buffer.html) for the full list of properties,
+instance methods, and class methods that are supported.
+
+As mentioned above, `require('buffer')` or use the `Buffer` global with
+[browserify](http://browserify.org) and this module will automatically be included
+in your bundle. Almost any npm module will work in the browser, even if it assumes that
+the node `Buffer` API will be available.
+
+To depend on this module explicitly (without browserify), require it like this:
+
+```js
+var Buffer = require('buffer/').Buffer // note: the trailing slash is important!
+```
+
+To require this module explicitly, use `require('buffer/')` which tells the node.js module
+lookup algorithm (also used by browserify) to use the **npm module** named `buffer`
+instead of the **node.js core** module named `buffer`!
+
+
+## how does it work?
+
+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.
+
+
+## tracking the latest node api
+
+This module tracks the Buffer API in the latest (unstable) version of node.js. The Buffer
+API is considered **stable** in the
+[node stability index](https://nodejs.org/docs/latest/api/documentation.html#documentation_stability_index),
+so it is unlikely that there will ever be breaking changes.
+Nonetheless, when/if the Buffer API changes in node, this module's API will change
+accordingly.
+
+## related packages
+
+- [`buffer-reverse`](https://www.npmjs.com/package/buffer-reverse) - Reverse a buffer
+- [`buffer-xor`](https://www.npmjs.com/package/buffer-xor) - Bitwise xor a buffer
+- [`is-buffer`](https://www.npmjs.com/package/is-buffer) - Determine if an object is a Buffer without including the whole `Buffer` package
+
+## conversion packages
+
+### convert typed array to buffer
+
+Use [`typedarray-to-buffer`](https://www.npmjs.com/package/typedarray-to-buffer) to convert any kind of typed array to a `Buffer`. Does not perform a copy, so it's super fast.
+
+### convert buffer to typed array
+
+`Buffer` is a subclass of `Uint8Array` (which is a typed array). So there is no need to explicitly convert to typed array. Just use the buffer as a `Uint8Array`.
+
+### convert blob to buffer
+
+Use [`blob-to-buffer`](https://www.npmjs.com/package/blob-to-buffer) to convert a `Blob` to a `Buffer`.
+
+### convert buffer to blob
+
+To convert a `Buffer` to a `Blob`, use the `Blob` constructor:
+
+```js
+var blob = new Blob([ buffer ])
+```
+
+Optionally, specify a mimetype:
+
+```js
+var blob = new Blob([ buffer ], { type: 'text/html' })
+```
+
+### convert arraybuffer to buffer
+
+To convert an `ArrayBuffer` to a `Buffer`, use the `Buffer.from` function. Does not perform a copy, so it's super fast.
+
+```js
+var buffer = Buffer.from(arrayBuffer)
+```
+
+### convert buffer to arraybuffer
+
+To convert a `Buffer` to an `ArrayBuffer`, use the `.buffer` property (which is present on all `Uint8Array` objects):
+
+```js
+var arrayBuffer = buffer.buffer.slice(
+ buffer.byteOffset, buffer.byteOffset + buffer.byteLength
+)
+```
+
+Alternatively, use the [`to-arraybuffer`](https://www.npmjs.com/package/to-arraybuffer) module.
+
+## performance
+
+See perf tests in `/perf`.
+
+`BrowserBuffer` is the browser `buffer` module (this repo). `Uint8Array` is included as a
+sanity check (since `BrowserBuffer` uses `Uint8Array` under the hood, `Uint8Array` will
+always be at least a bit faster). Finally, `NodeBuffer` is the node.js buffer module,
+which is included to compare against.
+
+NOTE: Performance has improved since these benchmarks were taken. PR welcome to update the README.
+
+### Chrome 38
+
+| Method | Operations | Accuracy | Sampled | Fastest |
+|:-------|:-----------|:---------|:--------|:-------:|
+| BrowserBuffer#bracket-notation | 11,457,464 ops/sec | ±0.86% | 66 | ✓ |
+| Uint8Array#bracket-notation | 10,824,332 ops/sec | ±0.74% | 65 | |
+| | | | |
+| BrowserBuffer#concat | 450,532 ops/sec | ±0.76% | 68 | |
+| Uint8Array#concat | 1,368,911 ops/sec | ±1.50% | 62 | ✓ |
+| | | | |
+| BrowserBuffer#copy(16000) | 903,001 ops/sec | ±0.96% | 67 | |
+| Uint8Array#copy(16000) | 1,422,441 ops/sec | ±1.04% | 66 | ✓ |
+| | | | |
+| BrowserBuffer#copy(16) | 11,431,358 ops/sec | ±0.46% | 69 | |
+| Uint8Array#copy(16) | 13,944,163 ops/sec | ±1.12% | 68 | ✓ |
+| | | | |
+| BrowserBuffer#new(16000) | 106,329 ops/sec | ±6.70% | 44 | |
+| Uint8Array#new(16000) | 131,001 ops/sec | ±2.85% | 31 | ✓ |
+| | | | |
+| BrowserBuffer#new(16) | 1,554,491 ops/sec | ±1.60% | 65 | |
+| Uint8Array#new(16) | 6,623,930 ops/sec | ±1.66% | 65 | ✓ |
+| | | | |
+| BrowserBuffer#readDoubleBE | 112,830 ops/sec | ±0.51% | 69 | ✓ |
+| DataView#getFloat64 | 93,500 ops/sec | ±0.57% | 68 | |
+| | | | |
+| BrowserBuffer#readFloatBE | 146,678 ops/sec | ±0.95% | 68 | ✓ |
+| DataView#getFloat32 | 99,311 ops/sec | ±0.41% | 67 | |
+| | | | |
+| BrowserBuffer#readUInt32LE | 843,214 ops/sec | ±0.70% | 69 | ✓ |
+| DataView#getUint32 | 103,024 ops/sec | ±0.64% | 67 | |
+| | | | |
+| BrowserBuffer#slice | 1,013,941 ops/sec | ±0.75% | 67 | |
+| Uint8Array#subarray | 1,903,928 ops/sec | ±0.53% | 67 | ✓ |
+| | | | |
+| BrowserBuffer#writeFloatBE | 61,387 ops/sec | ±0.90% | 67 | |
+| DataView#setFloat32 | 141,249 ops/sec | ±0.40% | 66 | ✓ |
+
+
+### Firefox 33
+
+| Method | Operations | Accuracy | Sampled | Fastest |
+|:-------|:-----------|:---------|:--------|:-------:|
+| BrowserBuffer#bracket-notation | 20,800,421 ops/sec | ±1.84% | 60 | |
+| Uint8Array#bracket-notation | 20,826,235 ops/sec | ±2.02% | 61 | ✓ |
+| | | | |
+| BrowserBuffer#concat | 153,076 ops/sec | ±2.32% | 61 | |
+| Uint8Array#concat | 1,255,674 ops/sec | ±8.65% | 52 | ✓ |
+| | | | |
+| BrowserBuffer#copy(16000) | 1,105,312 ops/sec | ±1.16% | 63 | |
+| Uint8Array#copy(16000) | 1,615,911 ops/sec | ±0.55% | 66 | ✓ |
+| | | | |
+| BrowserBuffer#copy(16) | 16,357,599 ops/sec | ±0.73% | 68 | |
+| Uint8Array#copy(16) | 31,436,281 ops/sec | ±1.05% | 68 | ✓ |
+| | | | |
+| BrowserBuffer#new(16000) | 52,995 ops/sec | ±6.01% | 35 | |
+| Uint8Array#new(16000) | 87,686 ops/sec | ±5.68% | 45 | ✓ |
+| | | | |
+| BrowserBuffer#new(16) | 252,031 ops/sec | ±1.61% | 66 | |
+| Uint8Array#new(16) | 8,477,026 ops/sec | ±0.49% | 68 | ✓ |
+| | | | |
+| BrowserBuffer#readDoubleBE | 99,871 ops/sec | ±0.41% | 69 | |
+| DataView#getFloat64 | 285,663 ops/sec | ±0.70% | 68 | ✓ |
+| | | | |
+| BrowserBuffer#readFloatBE | 115,540 ops/sec | ±0.42% | 69 | |
+| DataView#getFloat32 | 288,722 ops/sec | ±0.82% | 68 | ✓ |
+| | | | |
+| BrowserBuffer#readUInt32LE | 633,926 ops/sec | ±1.08% | 67 | ✓ |
+| DataView#getUint32 | 294,808 ops/sec | ±0.79% | 64 | |
+| | | | |
+| BrowserBuffer#slice | 349,425 ops/sec | ±0.46% | 69 | |
+| Uint8Array#subarray | 5,965,819 ops/sec | ±0.60% | 65 | ✓ |
+| | | | |
+| BrowserBuffer#writeFloatBE | 59,980 ops/sec | ±0.41% | 67 | |
+| DataView#setFloat32 | 317,634 ops/sec | ±0.63% | 68 | ✓ |
+
+### Safari 8
+
+| Method | Operations | Accuracy | Sampled | Fastest |
+|:-------|:-----------|:---------|:--------|:-------:|
+| BrowserBuffer#bracket-notation | 10,279,729 ops/sec | ±2.25% | 56 | ✓ |
+| Uint8Array#bracket-notation | 10,030,767 ops/sec | ±2.23% | 59 | |
+| | | | |
+| BrowserBuffer#concat | 144,138 ops/sec | ±1.38% | 65 | |
+| Uint8Array#concat | 4,950,764 ops/sec | ±1.70% | 63 | ✓ |
+| | | | |
+| BrowserBuffer#copy(16000) | 1,058,548 ops/sec | ±1.51% | 64 | |
+| Uint8Array#copy(16000) | 1,409,666 ops/sec | ±1.17% | 65 | ✓ |
+| | | | |
+| BrowserBuffer#copy(16) | 6,282,529 ops/sec | ±1.88% | 58 | |
+| Uint8Array#copy(16) | 11,907,128 ops/sec | ±2.87% | 58 | ✓ |
+| | | | |
+| BrowserBuffer#new(16000) | 101,663 ops/sec | ±3.89% | 57 | |
+| Uint8Array#new(16000) | 22,050,818 ops/sec | ±6.51% | 46 | ✓ |
+| | | | |
+| BrowserBuffer#new(16) | 176,072 ops/sec | ±2.13% | 64 | |
+| Uint8Array#new(16) | 24,385,731 ops/sec | ±5.01% | 51 | ✓ |
+| | | | |
+| BrowserBuffer#readDoubleBE | 41,341 ops/sec | ±1.06% | 67 | |
+| DataView#getFloat64 | 322,280 ops/sec | ±0.84% | 68 | ✓ |
+| | | | |
+| BrowserBuffer#readFloatBE | 46,141 ops/sec | ±1.06% | 65 | |
+| DataView#getFloat32 | 337,025 ops/sec | ±0.43% | 69 | ✓ |
+| | | | |
+| BrowserBuffer#readUInt32LE | 151,551 ops/sec | ±1.02% | 66 | |
+| DataView#getUint32 | 308,278 ops/sec | ±0.94% | 67 | ✓ |
+| | | | |
+| BrowserBuffer#slice | 197,365 ops/sec | ±0.95% | 66 | |
+| Uint8Array#subarray | 9,558,024 ops/sec | ±3.08% | 58 | ✓ |
+| | | | |
+| BrowserBuffer#writeFloatBE | 17,518 ops/sec | ±1.03% | 63 | |
+| DataView#setFloat32 | 319,751 ops/sec | ±0.48% | 68 | ✓ |
+
+
+### Node 0.11.14
+
+| Method | Operations | Accuracy | Sampled | Fastest |
+|:-------|:-----------|:---------|:--------|:-------:|
+| BrowserBuffer#bracket-notation | 10,489,828 ops/sec | ±3.25% | 90 | |
+| Uint8Array#bracket-notation | 10,534,884 ops/sec | ±0.81% | 92 | ✓ |
+| NodeBuffer#bracket-notation | 10,389,910 ops/sec | ±0.97% | 87 | |
+| | | | |
+| BrowserBuffer#concat | 487,830 ops/sec | ±2.58% | 88 | |
+| Uint8Array#concat | 1,814,327 ops/sec | ±1.28% | 88 | ✓ |
+| NodeBuffer#concat | 1,636,523 ops/sec | ±1.88% | 73 | |
+| | | | |
+| BrowserBuffer#copy(16000) | 1,073,665 ops/sec | ±0.77% | 90 | |
+| Uint8Array#copy(16000) | 1,348,517 ops/sec | ±0.84% | 89 | ✓ |
+| NodeBuffer#copy(16000) | 1,289,533 ops/sec | ±0.82% | 93 | |
+| | | | |
+| BrowserBuffer#copy(16) | 12,782,706 ops/sec | ±0.74% | 85 | |
+| Uint8Array#copy(16) | 14,180,427 ops/sec | ±0.93% | 92 | ✓ |
+| NodeBuffer#copy(16) | 11,083,134 ops/sec | ±1.06% | 89 | |
+| | | | |
+| BrowserBuffer#new(16000) | 141,678 ops/sec | ±3.30% | 67 | |
+| Uint8Array#new(16000) | 161,491 ops/sec | ±2.96% | 60 | |
+| NodeBuffer#new(16000) | 292,699 ops/sec | ±3.20% | 55 | ✓ |
+| | | | |
+| BrowserBuffer#new(16) | 1,655,466 ops/sec | ±2.41% | 82 | |
+| Uint8Array#new(16) | 14,399,926 ops/sec | ±0.91% | 94 | ✓ |
+| NodeBuffer#new(16) | 3,894,696 ops/sec | ±0.88% | 92 | |
+| | | | |
+| BrowserBuffer#readDoubleBE | 109,582 ops/sec | ±0.75% | 93 | ✓ |
+| DataView#getFloat64 | 91,235 ops/sec | ±0.81% | 90 | |
+| NodeBuffer#readDoubleBE | 88,593 ops/sec | ±0.96% | 81 | |
+| | | | |
+| BrowserBuffer#readFloatBE | 139,854 ops/sec | ±1.03% | 85 | ✓ |
+| DataView#getFloat32 | 98,744 ops/sec | ±0.80% | 89 | |
+| NodeBuffer#readFloatBE | 92,769 ops/sec | ±0.94% | 93 | |
+| | | | |
+| BrowserBuffer#readUInt32LE | 710,861 ops/sec | ±0.82% | 92 | |
+| DataView#getUint32 | 117,893 ops/sec | ±0.84% | 91 | |
+| NodeBuffer#readUInt32LE | 851,412 ops/sec | ±0.72% | 93 | ✓ |
+| | | | |
+| BrowserBuffer#slice | 1,673,877 ops/sec | ±0.73% | 94 | |
+| Uint8Array#subarray | 6,919,243 ops/sec | ±0.67% | 90 | ✓ |
+| NodeBuffer#slice | 4,617,604 ops/sec | ±0.79% | 93 | |
+| | | | |
+| BrowserBuffer#writeFloatBE | 66,011 ops/sec | ±0.75% | 93 | |
+| DataView#setFloat32 | 127,760 ops/sec | ±0.72% | 93 | ✓ |
+| NodeBuffer#writeFloatBE | 103,352 ops/sec | ±0.83% | 93 | |
+
+### iojs 1.8.1
+
+| Method | Operations | Accuracy | Sampled | Fastest |
+|:-------|:-----------|:---------|:--------|:-------:|
+| BrowserBuffer#bracket-notation | 10,990,488 ops/sec | ±1.11% | 91 | |
+| Uint8Array#bracket-notation | 11,268,757 ops/sec | ±0.65% | 97 | |
+| NodeBuffer#bracket-notation | 11,353,260 ops/sec | ±0.83% | 94 | ✓ |
+| | | | |
+| BrowserBuffer#concat | 378,954 ops/sec | ±0.74% | 94 | |
+| Uint8Array#concat | 1,358,288 ops/sec | ±0.97% | 87 | |
+| NodeBuffer#concat | 1,934,050 ops/sec | ±1.11% | 78 | ✓ |
+| | | | |
+| BrowserBuffer#copy(16000) | 894,538 ops/sec | ±0.56% | 84 | |
+| Uint8Array#copy(16000) | 1,442,656 ops/sec | ±0.71% | 96 | |
+| NodeBuffer#copy(16000) | 1,457,898 ops/sec | ±0.53% | 92 | ✓ |
+| | | | |
+| BrowserBuffer#copy(16) | 12,870,457 ops/sec | ±0.67% | 95 | |
+| Uint8Array#copy(16) | 16,643,989 ops/sec | ±0.61% | 93 | ✓ |
+| NodeBuffer#copy(16) | 14,885,848 ops/sec | ±0.74% | 94 | |
+| | | | |
+| BrowserBuffer#new(16000) | 109,264 ops/sec | ±4.21% | 63 | |
+| Uint8Array#new(16000) | 138,916 ops/sec | ±1.87% | 61 | |
+| NodeBuffer#new(16000) | 281,449 ops/sec | ±3.58% | 51 | ✓ |
+| | | | |
+| BrowserBuffer#new(16) | 1,362,935 ops/sec | ±0.56% | 99 | |
+| Uint8Array#new(16) | 6,193,090 ops/sec | ±0.64% | 95 | ✓ |
+| NodeBuffer#new(16) | 4,745,425 ops/sec | ±1.56% | 90 | |
+| | | | |
+| BrowserBuffer#readDoubleBE | 118,127 ops/sec | ±0.59% | 93 | ✓ |
+| DataView#getFloat64 | 107,332 ops/sec | ±0.65% | 91 | |
+| NodeBuffer#readDoubleBE | 116,274 ops/sec | ±0.94% | 95 | |
+| | | | |
+| BrowserBuffer#readFloatBE | 150,326 ops/sec | ±0.58% | 95 | ✓ |
+| DataView#getFloat32 | 110,541 ops/sec | ±0.57% | 98 | |
+| NodeBuffer#readFloatBE | 121,599 ops/sec | ±0.60% | 87 | |
+| | | | |
+| BrowserBuffer#readUInt32LE | 814,147 ops/sec | ±0.62% | 93 | |
+| DataView#getUint32 | 137,592 ops/sec | ±0.64% | 90 | |
+| NodeBuffer#readUInt32LE | 931,650 ops/sec | ±0.71% | 96 | ✓ |
+| | | | |
+| BrowserBuffer#slice | 878,590 ops/sec | ±0.68% | 93 | |
+| Uint8Array#subarray | 2,843,308 ops/sec | ±1.02% | 90 | |
+| NodeBuffer#slice | 4,998,316 ops/sec | ±0.68% | 90 | ✓ |
+| | | | |
+| BrowserBuffer#writeFloatBE | 65,927 ops/sec | ±0.74% | 93 | |
+| DataView#setFloat32 | 139,823 ops/sec | ±0.97% | 89 | ✓ |
+| NodeBuffer#writeFloatBE | 135,763 ops/sec | ±0.65% | 96 | |
+| | | | |
+
+## Testing the project
+
+First, install the project:
+
+ npm install
+
+Then, to run tests in Node.js, run:
+
+ npm run test-node
+
+To test locally in a browser, you can run:
+
+ npm run test-browser-es5-local # For ES5 browsers that don't support ES6
+ npm run test-browser-es6-local # For ES6 compliant browsers
+
+This will print out a URL that you can then open in a browser to run the tests, using [airtap](https://www.npmjs.com/package/airtap).
+
+To run automated browser tests using Saucelabs, ensure that your `SAUCE_USERNAME` and `SAUCE_ACCESS_KEY` environment variables are set, then run:
+
+ npm test
+
+This is what's run in Travis, to check against various browsers. The list of browsers is kept in the `bin/airtap-es5.yml` and `bin/airtap-es6.yml` files.
+
+## JavaScript Standard Style
+
+This module uses [JavaScript Standard Style](https://github.com/feross/standard).
+
+[](https://github.com/feross/standard)
+
+To test that the code conforms to the style, `npm install` and run:
+
+ ./node_modules/.bin/standard
+
+## credit
+
+This was originally forked from [buffer-browserify](https://github.com/toots/buffer-browserify).
+
+## Security Policies and Procedures
+
+The `buffer` team and community take all security bugs in `buffer` seriously. Please see our [security policies and procedures](https://github.com/feross/security) document to learn how to report issues.
+
+## license
+
+MIT. Copyright (C) [Feross Aboukhadijeh](http://feross.org), and other contributors. Originally forked from an MIT-licensed module by Romain Beauxis.
diff --git a/node_modules/buffer/index.d.ts b/node_modules/buffer/index.d.ts
new file mode 100644
index 0000000000..5d1a804e5a
--- /dev/null
+++ b/node_modules/buffer/index.d.ts
@@ -0,0 +1,186 @@
+export class Buffer extends Uint8Array {
+ length: number
+ write(string: string, offset?: number, length?: number, encoding?: string): number;
+ toString(encoding?: string, start?: number, end?: number): string;
+ toJSON(): { type: 'Buffer', data: any[] };
+ equals(otherBuffer: Buffer): boolean;
+ compare(otherBuffer: Buffer, targetStart?: number, targetEnd?: number, sourceStart?: number, sourceEnd?: number): number;
+ copy(targetBuffer: Buffer, targetStart?: number, sourceStart?: number, sourceEnd?: number): number;
+ slice(start?: number, end?: number): Buffer;
+ writeUIntLE(value: number, offset: number, byteLength: number, noAssert?: boolean): number;
+ writeUIntBE(value: number, offset: number, byteLength: number, noAssert?: boolean): number;
+ writeIntLE(value: number, offset: number, byteLength: number, noAssert?: boolean): number;
+ writeIntBE(value: number, offset: number, byteLength: number, noAssert?: boolean): number;
+ readUIntLE(offset: number, byteLength: number, noAssert?: boolean): number;
+ readUIntBE(offset: number, byteLength: number, noAssert?: boolean): number;
+ readIntLE(offset: number, byteLength: number, noAssert?: boolean): number;
+ readIntBE(offset: number, byteLength: number, noAssert?: boolean): number;
+ readUInt8(offset: number, noAssert?: boolean): number;
+ readUInt16LE(offset: number, noAssert?: boolean): number;
+ readUInt16BE(offset: number, noAssert?: boolean): number;
+ readUInt32LE(offset: number, noAssert?: boolean): number;
+ readUInt32BE(offset: number, noAssert?: boolean): number;
+ readInt8(offset: number, noAssert?: boolean): number;
+ readInt16LE(offset: number, noAssert?: boolean): number;
+ readInt16BE(offset: number, noAssert?: boolean): number;
+ readInt32LE(offset: number, noAssert?: boolean): number;
+ readInt32BE(offset: number, noAssert?: boolean): number;
+ readFloatLE(offset: number, noAssert?: boolean): number;
+ readFloatBE(offset: number, noAssert?: boolean): number;
+ readDoubleLE(offset: number, noAssert?: boolean): number;
+ readDoubleBE(offset: number, noAssert?: boolean): number;
+ reverse(): this;
+ swap16(): Buffer;
+ swap32(): Buffer;
+ swap64(): Buffer;
+ writeUInt8(value: number, offset: number, noAssert?: boolean): number;
+ writeUInt16LE(value: number, offset: number, noAssert?: boolean): number;
+ writeUInt16BE(value: number, offset: number, noAssert?: boolean): number;
+ writeUInt32LE(value: number, offset: number, noAssert?: boolean): number;
+ writeUInt32BE(value: number, offset: number, noAssert?: boolean): number;
+ writeInt8(value: number, offset: number, noAssert?: boolean): number;
+ writeInt16LE(value: number, offset: number, noAssert?: boolean): number;
+ writeInt16BE(value: number, offset: number, noAssert?: boolean): number;
+ writeInt32LE(value: number, offset: number, noAssert?: boolean): number;
+ writeInt32BE(value: number, offset: number, noAssert?: boolean): number;
+ writeFloatLE(value: number, offset: number, noAssert?: boolean): number;
+ writeFloatBE(value: number, offset: number, noAssert?: boolean): number;
+ writeDoubleLE(value: number, offset: number, noAssert?: boolean): number;
+ writeDoubleBE(value: number, offset: number, noAssert?: boolean): number;
+ fill(value: any, offset?: number, end?: number): this;
+ indexOf(value: string | number | Buffer, byteOffset?: number, encoding?: string): number;
+ lastIndexOf(value: string | number | Buffer, byteOffset?: number, encoding?: string): number;
+ includes(value: string | number | Buffer, byteOffset?: number, encoding?: string): boolean;
+
+ /**
+ * Allocates a new buffer containing the given {str}.
+ *
+ * @param str String to store in buffer.
+ * @param encoding encoding to use, optional. Default is 'utf8'
+ */
+ constructor (str: string, encoding?: string);
+ /**
+ * Allocates a new buffer of {size} octets.
+ *
+ * @param size count of octets to allocate.
+ */
+ constructor (size: number);
+ /**
+ * Allocates a new buffer containing the given {array} of octets.
+ *
+ * @param array The octets to store.
+ */
+ constructor (array: Uint8Array);
+ /**
+ * Produces a Buffer backed by the same allocated memory as
+ * the given {ArrayBuffer}.
+ *
+ *
+ * @param arrayBuffer The ArrayBuffer with which to share memory.
+ */
+ constructor (arrayBuffer: ArrayBuffer);
+ /**
+ * Allocates a new buffer containing the given {array} of octets.
+ *
+ * @param array The octets to store.
+ */
+ constructor (array: any[]);
+ /**
+ * Copies the passed {buffer} data onto a new {Buffer} instance.
+ *
+ * @param buffer The buffer to copy.
+ */
+ constructor (buffer: Buffer);
+ prototype: Buffer;
+ /**
+ * Allocates a new Buffer using an {array} of octets.
+ *
+ * @param array
+ */
+ static from(array: any[]): Buffer;
+ /**
+ * When passed a reference to the .buffer property of a TypedArray instance,
+ * the newly created Buffer will share the same allocated memory as the TypedArray.
+ * The optional {byteOffset} and {length} arguments specify a memory range
+ * within the {arrayBuffer} that will be shared by the Buffer.
+ *
+ * @param arrayBuffer The .buffer property of a TypedArray or a new ArrayBuffer()
+ * @param byteOffset
+ * @param length
+ */
+ static from(arrayBuffer: ArrayBuffer, byteOffset?: number, length?: number): Buffer;
+ /**
+ * Copies the passed {buffer} data onto a new Buffer instance.
+ *
+ * @param buffer
+ */
+ static from(buffer: Buffer | Uint8Array): Buffer;
+ /**
+ * Creates a new Buffer containing the given JavaScript string {str}.
+ * If provided, the {encoding} parameter identifies the character encoding.
+ * If not provided, {encoding} defaults to 'utf8'.
+ *
+ * @param str
+ */
+ static from(str: string, encoding?: string): Buffer;
+ /**
+ * Returns true if {obj} is a Buffer
+ *
+ * @param obj object to test.
+ */
+ static isBuffer(obj: any): obj is Buffer;
+ /**
+ * Returns true if {encoding} is a valid encoding argument.
+ * Valid string encodings in Node 0.12: 'ascii'|'utf8'|'utf16le'|'ucs2'(alias of 'utf16le')|'base64'|'binary'(deprecated)|'hex'
+ *
+ * @param encoding string to test.
+ */
+ static isEncoding(encoding: string): boolean;
+ /**
+ * Gives the actual byte length of a string. encoding defaults to 'utf8'.
+ * This is not the same as String.prototype.length since that returns the number of characters in a string.
+ *
+ * @param string string to test.
+ * @param encoding encoding used to evaluate (defaults to 'utf8')
+ */
+ static byteLength(string: string, encoding?: string): number;
+ /**
+ * Returns a buffer which is the result of concatenating all the buffers in the list together.
+ *
+ * If the list has no items, or if the totalLength is 0, then it returns a zero-length buffer.
+ * If the list has exactly one item, then the first item of the list is returned.
+ * If the list has more than one item, then a new Buffer is created.
+ *
+ * @param list An array of Buffer objects to concatenate
+ * @param totalLength Total length of the buffers when concatenated.
+ * If totalLength is not provided, it is read from the buffers in the list. However, this adds an additional loop to the function, so it is faster to provide the length explicitly.
+ */
+ static concat(list: Buffer[], totalLength?: number): Buffer;
+ /**
+ * The same as buf1.compare(buf2).
+ */
+ static compare(buf1: Buffer, buf2: Buffer): number;
+ /**
+ * Allocates a new buffer of {size} octets.
+ *
+ * @param size count of octets to allocate.
+ * @param fill if specified, buffer will be initialized by calling buf.fill(fill).
+ * If parameter is omitted, buffer will be filled with zeros.
+ * @param encoding encoding used for call to buf.fill while initializing
+ */
+ static alloc(size: number, fill?: string | Buffer | number, encoding?: string): Buffer;
+ /**
+ * Allocates a new buffer of {size} octets, leaving memory not initialized, so the contents
+ * of the newly created Buffer are unknown and may contain sensitive data.
+ *
+ * @param size count of octets to allocate
+ */
+ static allocUnsafe(size: number): Buffer;
+ /**
+ * Allocates a new non-pooled buffer of {size} octets, leaving memory not initialized, so the contents
+ * of the newly created Buffer are unknown and may contain sensitive data.
+ *
+ * @param size count of octets to allocate
+ */
+ static allocUnsafeSlow(size: number): Buffer;
+}
diff --git a/node_modules/buffer/index.js b/node_modules/buffer/index.js
new file mode 100644
index 0000000000..609cf31139
--- /dev/null
+++ b/node_modules/buffer/index.js
@@ -0,0 +1,1817 @@
+/*!
+ * The buffer module from node.js, for the browser.
+ *
+ * @author Feross Aboukhadijeh
+ * @license MIT
+ */
+/* eslint-disable no-proto */
+
+'use strict'
+
+var base64 = require('base64-js')
+var ieee754 = require('ieee754')
+var customInspectSymbol =
+ (typeof Symbol === 'function' && typeof Symbol['for'] === 'function') // eslint-disable-line dot-notation
+ ? Symbol['for']('nodejs.util.inspect.custom') // eslint-disable-line dot-notation
+ : null
+
+exports.Buffer = Buffer
+exports.SlowBuffer = SlowBuffer
+exports.INSPECT_MAX_BYTES = 50
+
+var K_MAX_LENGTH = 0x7fffffff
+exports.kMaxLength = K_MAX_LENGTH
+
+/**
+ * If `Buffer.TYPED_ARRAY_SUPPORT`:
+ * === true Use Uint8Array implementation (fastest)
+ * === false Print warning and recommend using `buffer` v4.x which has an 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+.
+ *
+ * We report that the browser does not support typed arrays if the are not subclassable
+ * using __proto__. Firefox 4-29 lacks support for adding new properties to `Uint8Array`
+ * (See: https://bugzilla.mozilla.org/show_bug.cgi?id=695438). IE 10 lacks support
+ * for __proto__ and has a buggy typed array implementation.
+ */
+Buffer.TYPED_ARRAY_SUPPORT = typedArraySupport()
+
+if (!Buffer.TYPED_ARRAY_SUPPORT && typeof console !== 'undefined' &&
+ typeof console.error === 'function') {
+ console.error(
+ 'This browser lacks typed array (Uint8Array) support which is required by ' +
+ '`buffer` v5.x. Use `buffer` v4.x if you require old browser support.'
+ )
+}
+
+function typedArraySupport () {
+ // Can typed array instances can be augmented?
+ try {
+ var arr = new Uint8Array(1)
+ var proto = { foo: function () { return 42 } }
+ Object.setPrototypeOf(proto, Uint8Array.prototype)
+ Object.setPrototypeOf(arr, proto)
+ return arr.foo() === 42
+ } catch (e) {
+ return false
+ }
+}
+
+Object.defineProperty(Buffer.prototype, 'parent', {
+ enumerable: true,
+ get: function () {
+ if (!Buffer.isBuffer(this)) return undefined
+ return this.buffer
+ }
+})
+
+Object.defineProperty(Buffer.prototype, 'offset', {
+ enumerable: true,
+ get: function () {
+ if (!Buffer.isBuffer(this)) return undefined
+ return this.byteOffset
+ }
+})
+
+function createBuffer (length) {
+ if (length > K_MAX_LENGTH) {
+ throw new RangeError('The value "' + length + '" is invalid for option "size"')
+ }
+ // Return an augmented `Uint8Array` instance
+ var buf = new Uint8Array(length)
+ Object.setPrototypeOf(buf, Buffer.prototype)
+ return buf
+}
+
+/**
+ * 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) {
+ // Common case.
+ if (typeof arg === 'number') {
+ if (typeof encodingOrOffset === 'string') {
+ throw new TypeError(
+ 'The "string" argument must be of type string. Received type number'
+ )
+ }
+ return allocUnsafe(arg)
+ }
+ return from(arg, encodingOrOffset, length)
+}
+
+Buffer.poolSize = 8192 // not used by this implementation
+
+function from (value, encodingOrOffset, length) {
+ if (typeof value === 'string') {
+ return fromString(value, encodingOrOffset)
+ }
+
+ if (ArrayBuffer.isView(value)) {
+ return fromArrayView(value)
+ }
+
+ if (value == null) {
+ throw new TypeError(
+ 'The first argument must be one of type string, Buffer, ArrayBuffer, Array, ' +
+ 'or Array-like Object. Received type ' + (typeof value)
+ )
+ }
+
+ if (isInstance(value, ArrayBuffer) ||
+ (value && isInstance(value.buffer, ArrayBuffer))) {
+ return fromArrayBuffer(value, encodingOrOffset, length)
+ }
+
+ if (typeof SharedArrayBuffer !== 'undefined' &&
+ (isInstance(value, SharedArrayBuffer) ||
+ (value && isInstance(value.buffer, SharedArrayBuffer)))) {
+ return fromArrayBuffer(value, encodingOrOffset, length)
+ }
+
+ if (typeof value === 'number') {
+ throw new TypeError(
+ 'The "value" argument must not be of type number. Received type number'
+ )
+ }
+
+ var valueOf = value.valueOf && value.valueOf()
+ if (valueOf != null && valueOf !== value) {
+ return Buffer.from(valueOf, encodingOrOffset, length)
+ }
+
+ var b = fromObject(value)
+ if (b) return b
+
+ if (typeof Symbol !== 'undefined' && Symbol.toPrimitive != null &&
+ typeof value[Symbol.toPrimitive] === 'function') {
+ return Buffer.from(
+ value[Symbol.toPrimitive]('string'), encodingOrOffset, length
+ )
+ }
+
+ throw new TypeError(
+ 'The first argument must be one of type string, Buffer, ArrayBuffer, Array, ' +
+ 'or Array-like Object. Received type ' + (typeof 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(value, encodingOrOffset, length)
+}
+
+// Note: Change prototype *after* Buffer.from is defined to workaround Chrome bug:
+// https://github.com/feross/buffer/pull/148
+Object.setPrototypeOf(Buffer.prototype, Uint8Array.prototype)
+Object.setPrototypeOf(Buffer, Uint8Array)
+
+function assertSize (size) {
+ if (typeof size !== 'number') {
+ throw new TypeError('"size" argument must be of type number')
+ } else if (size < 0) {
+ throw new RangeError('The value "' + size + '" is invalid for option "size"')
+ }
+}
+
+function alloc (size, fill, encoding) {
+ assertSize(size)
+ if (size <= 0) {
+ return createBuffer(size)
+ }
+ if (fill !== undefined) {
+ // Only pay attention to encoding if it's a string. This
+ // prevents accidentally sending in a number that would
+ // be interpreted as a start offset.
+ return typeof encoding === 'string'
+ ? createBuffer(size).fill(fill, encoding)
+ : createBuffer(size).fill(fill)
+ }
+ return createBuffer(size)
+}
+
+/**
+ * Creates a new filled Buffer instance.
+ * alloc(size[, fill[, encoding]])
+ **/
+Buffer.alloc = function (size, fill, encoding) {
+ return alloc(size, fill, encoding)
+}
+
+function allocUnsafe (size) {
+ assertSize(size)
+ return createBuffer(size < 0 ? 0 : checked(size) | 0)
+}
+
+/**
+ * Equivalent to Buffer(num), by default creates a non-zero-filled Buffer instance.
+ * */
+Buffer.allocUnsafe = function (size) {
+ return allocUnsafe(size)
+}
+/**
+ * Equivalent to SlowBuffer(num), by default creates a non-zero-filled Buffer instance.
+ */
+Buffer.allocUnsafeSlow = function (size) {
+ return allocUnsafe(size)
+}
+
+function fromString (string, encoding) {
+ if (typeof encoding !== 'string' || encoding === '') {
+ encoding = 'utf8'
+ }
+
+ if (!Buffer.isEncoding(encoding)) {
+ throw new TypeError('Unknown encoding: ' + encoding)
+ }
+
+ var length = byteLength(string, encoding) | 0
+ var buf = createBuffer(length)
+
+ var actual = buf.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')
+ buf = buf.slice(0, actual)
+ }
+
+ return buf
+}
+
+function fromArrayLike (array) {
+ var length = array.length < 0 ? 0 : checked(array.length) | 0
+ var buf = createBuffer(length)
+ for (var i = 0; i < length; i += 1) {
+ buf[i] = array[i] & 255
+ }
+ return buf
+}
+
+function fromArrayView (arrayView) {
+ if (isInstance(arrayView, Uint8Array)) {
+ var copy = new Uint8Array(arrayView)
+ return fromArrayBuffer(copy.buffer, copy.byteOffset, copy.byteLength)
+ }
+ return fromArrayLike(arrayView)
+}
+
+function fromArrayBuffer (array, byteOffset, length) {
+ if (byteOffset < 0 || array.byteLength < byteOffset) {
+ throw new RangeError('"offset" is outside of buffer bounds')
+ }
+
+ if (array.byteLength < byteOffset + (length || 0)) {
+ throw new RangeError('"length" is outside of buffer bounds')
+ }
+
+ var buf
+ if (byteOffset === undefined && length === undefined) {
+ buf = new Uint8Array(array)
+ } else if (length === undefined) {
+ buf = new Uint8Array(array, byteOffset)
+ } else {
+ buf = new Uint8Array(array, byteOffset, length)
+ }
+
+ // Return an augmented `Uint8Array` instance
+ Object.setPrototypeOf(buf, Buffer.prototype)
+
+ return buf
+}
+
+function fromObject (obj) {
+ if (Buffer.isBuffer(obj)) {
+ var len = checked(obj.length) | 0
+ var buf = createBuffer(len)
+
+ if (buf.length === 0) {
+ return buf
+ }
+
+ obj.copy(buf, 0, 0, len)
+ return buf
+ }
+
+ if (obj.length !== undefined) {
+ if (typeof obj.length !== 'number' || numberIsNaN(obj.length)) {
+ return createBuffer(0)
+ }
+ return fromArrayLike(obj)
+ }
+
+ if (obj.type === 'Buffer' && Array.isArray(obj.data)) {
+ return fromArrayLike(obj.data)
+ }
+}
+
+function checked (length) {
+ // Note: cannot use `length < K_MAX_LENGTH` here because that fails when
+ // length is NaN (which is otherwise coerced to zero.)
+ if (length >= K_MAX_LENGTH) {
+ throw new RangeError('Attempt to allocate Buffer larger than maximum ' +
+ 'size: 0x' + K_MAX_LENGTH.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 === true &&
+ b !== Buffer.prototype // so Buffer.isBuffer(Buffer.prototype) will be false
+}
+
+Buffer.compare = function compare (a, b) {
+ if (isInstance(a, Uint8Array)) a = Buffer.from(a, a.offset, a.byteLength)
+ if (isInstance(b, Uint8Array)) b = Buffer.from(b, b.offset, b.byteLength)
+ if (!Buffer.isBuffer(a) || !Buffer.isBuffer(b)) {
+ throw new TypeError(
+ 'The "buf1", "buf2" arguments must be one of type Buffer or Uint8Array'
+ )
+ }
+
+ 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 (!Array.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 (isInstance(buf, Uint8Array)) {
+ if (pos + buf.length > buffer.length) {
+ Buffer.from(buf).copy(buffer, pos)
+ } else {
+ Uint8Array.prototype.set.call(
+ buffer,
+ buf,
+ pos
+ )
+ }
+ } else if (!Buffer.isBuffer(buf)) {
+ throw new TypeError('"list" argument must be an Array of Buffers')
+ } else {
+ buf.copy(buffer, pos)
+ }
+ pos += buf.length
+ }
+ return buffer
+}
+
+function byteLength (string, encoding) {
+ if (Buffer.isBuffer(string)) {
+ return string.length
+ }
+ if (ArrayBuffer.isView(string) || isInstance(string, ArrayBuffer)) {
+ return string.byteLength
+ }
+ if (typeof string !== 'string') {
+ throw new TypeError(
+ 'The "string" argument must be one of type string, Buffer, or ArrayBuffer. ' +
+ 'Received type ' + typeof string
+ )
+ }
+
+ var len = string.length
+ var mustMatch = (arguments.length > 2 && arguments[2] === true)
+ if (!mustMatch && 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':
+ 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 mustMatch ? -1 : 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 coercion 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
+ }
+ }
+}
+
+// This property is used by `Buffer.isBuffer` (and the `is-buffer` npm package)
+// to detect a Buffer instance. It's not possible to use `instanceof Buffer`
+// reliably in a browserify context because there could be multiple different
+// copies of the 'buffer' package in use. This method works even for Buffer
+// instances that were created from another copy of the `buffer` package.
+// See: https://github.com/feross/buffer/issues/154
+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
+ if (length === 0) return ''
+ if (arguments.length === 0) return utf8Slice(this, 0, length)
+ return slowToString.apply(this, arguments)
+}
+
+Buffer.prototype.toLocaleString = Buffer.prototype.toString
+
+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
+ str = this.toString('hex', 0, max).replace(/(.{2})/g, '$1 ').trim()
+ if (this.length > max) str += ' ... '
+ return ''
+}
+if (customInspectSymbol) {
+ Buffer.prototype[customInspectSymbol] = Buffer.prototype.inspect
+}
+
+Buffer.prototype.compare = function compare (target, start, end, thisStart, thisEnd) {
+ if (isInstance(target, Uint8Array)) {
+ target = Buffer.from(target, target.offset, target.byteLength)
+ }
+ if (!Buffer.isBuffer(target)) {
+ throw new TypeError(
+ 'The "target" argument must be one of type Buffer or Uint8Array. ' +
+ 'Received type ' + (typeof target)
+ )
+ }
+
+ 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 (numberIsNaN(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 (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
+ }
+ }
+
+ var strLen = string.length
+
+ if (length > strLen / 2) {
+ length = strLen / 2
+ }
+ for (var i = 0; i < length; ++i) {
+ var parsed = parseInt(string.substr(i * 2, 2), 16)
+ if (numberIsNaN(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 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
+ }
+ } 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':
+ case 'latin1':
+ case 'binary':
+ return asciiWrite(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 += hexSliceLookupTable[buf[i]]
+ }
+ return out
+}
+
+function utf16leSlice (buf, start, end) {
+ var bytes = buf.slice(start, end)
+ var res = ''
+ // If bytes.length is odd, the last 8 bits must be ignored (same as node.js)
+ for (var i = 0; i < bytes.length - 1; 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 = this.subarray(start, end)
+ // Return an augmented `Uint8Array` instance
+ Object.setPrototypeOf(newBuf, Buffer.prototype)
+
+ 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 =
+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 =
+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 =
+Buffer.prototype.readUInt8 = function readUInt8 (offset, noAssert) {
+ offset = offset >>> 0
+ if (!noAssert) checkOffset(offset, 1, this.length)
+ return this[offset]
+}
+
+Buffer.prototype.readUint16LE =
+Buffer.prototype.readUInt16LE = function readUInt16LE (offset, noAssert) {
+ offset = offset >>> 0
+ if (!noAssert) checkOffset(offset, 2, this.length)
+ return this[offset] | (this[offset + 1] << 8)
+}
+
+Buffer.prototype.readUint16BE =
+Buffer.prototype.readUInt16BE = function readUInt16BE (offset, noAssert) {
+ offset = offset >>> 0
+ if (!noAssert) checkOffset(offset, 2, this.length)
+ return (this[offset] << 8) | this[offset + 1]
+}
+
+Buffer.prototype.readUint32LE =
+Buffer.prototype.readUInt32LE = function readUInt32LE (offset, noAssert) {
+ offset = offset >>> 0
+ 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 =
+Buffer.prototype.readUInt32BE = function readUInt32BE (offset, noAssert) {
+ offset = offset >>> 0
+ 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) {
+ offset = offset >>> 0
+ 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) {
+ offset = offset >>> 0
+ 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) {
+ offset = offset >>> 0
+ 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) {
+ offset = offset >>> 0
+ 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) {
+ offset = offset >>> 0
+ 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) {
+ offset = offset >>> 0
+ if (!noAssert) checkOffset(offset, 4, this.length)
+ return ieee754.read(this, offset, true, 23, 4)
+}
+
+Buffer.prototype.readFloatBE = function readFloatBE (offset, noAssert) {
+ offset = offset >>> 0
+ if (!noAssert) checkOffset(offset, 4, this.length)
+ return ieee754.read(this, offset, false, 23, 4)
+}
+
+Buffer.prototype.readDoubleLE = function readDoubleLE (offset, noAssert) {
+ offset = offset >>> 0
+ if (!noAssert) checkOffset(offset, 8, this.length)
+ return ieee754.read(this, offset, true, 52, 8)
+}
+
+Buffer.prototype.readDoubleBE = function readDoubleBE (offset, noAssert) {
+ offset = offset >>> 0
+ 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 =
+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 =
+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 =
+Buffer.prototype.writeUInt8 = function writeUInt8 (value, offset, noAssert) {
+ value = +value
+ offset = offset >>> 0
+ if (!noAssert) checkInt(this, value, offset, 1, 0xff, 0)
+ this[offset] = (value & 0xff)
+ return offset + 1
+}
+
+Buffer.prototype.writeUint16LE =
+Buffer.prototype.writeUInt16LE = function writeUInt16LE (value, offset, noAssert) {
+ value = +value
+ offset = offset >>> 0
+ if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)
+ this[offset] = (value & 0xff)
+ this[offset + 1] = (value >>> 8)
+ return offset + 2
+}
+
+Buffer.prototype.writeUint16BE =
+Buffer.prototype.writeUInt16BE = function writeUInt16BE (value, offset, noAssert) {
+ value = +value
+ offset = offset >>> 0
+ if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)
+ this[offset] = (value >>> 8)
+ this[offset + 1] = (value & 0xff)
+ return offset + 2
+}
+
+Buffer.prototype.writeUint32LE =
+Buffer.prototype.writeUInt32LE = function writeUInt32LE (value, offset, noAssert) {
+ value = +value
+ offset = offset >>> 0
+ if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)
+ this[offset + 3] = (value >>> 24)
+ this[offset + 2] = (value >>> 16)
+ this[offset + 1] = (value >>> 8)
+ this[offset] = (value & 0xff)
+ return offset + 4
+}
+
+Buffer.prototype.writeUint32BE =
+Buffer.prototype.writeUInt32BE = function writeUInt32BE (value, offset, noAssert) {
+ value = +value
+ offset = offset >>> 0
+ if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)
+ this[offset] = (value >>> 24)
+ this[offset + 1] = (value >>> 16)
+ this[offset + 2] = (value >>> 8)
+ this[offset + 3] = (value & 0xff)
+ 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 (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)
+ this[offset] = (value & 0xff)
+ this[offset + 1] = (value >>> 8)
+ 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)
+ this[offset] = (value >>> 8)
+ this[offset + 1] = (value & 0xff)
+ 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)
+ this[offset] = (value & 0xff)
+ this[offset + 1] = (value >>> 8)
+ this[offset + 2] = (value >>> 16)
+ this[offset + 3] = (value >>> 24)
+ 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
+ this[offset] = (value >>> 24)
+ this[offset + 1] = (value >>> 16)
+ this[offset + 2] = (value >>> 8)
+ this[offset + 3] = (value & 0xff)
+ 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) {
+ value = +value
+ offset = offset >>> 0
+ 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) {
+ value = +value
+ offset = offset >>> 0
+ 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 (!Buffer.isBuffer(target)) throw new TypeError('argument should be a Buffer')
+ 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('Index out of range')
+ 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
+
+ if (this === target && typeof Uint8Array.prototype.copyWithin === 'function') {
+ // Use built-in when available, missing from IE11
+ this.copyWithin(targetStart, start, end)
+ } else {
+ Uint8Array.prototype.set.call(
+ target,
+ this.subarray(start, end),
+ 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 (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)
+ }
+ if (val.length === 1) {
+ var code = val.charCodeAt(0)
+ if ((encoding === 'utf8' && code < 128) ||
+ encoding === 'latin1') {
+ // Fast path: If `val` fits into a single byte, use that numeric value.
+ val = code
+ }
+ }
+ } else if (typeof val === 'number') {
+ val = val & 255
+ } else if (typeof val === 'boolean') {
+ val = Number(val)
+ }
+
+ // 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
+ : Buffer.from(val, encoding)
+ var len = bytes.length
+ if (len === 0) {
+ throw new TypeError('The value "' + val +
+ '" is invalid for argument "value"')
+ }
+ 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 takes equal signs as end of the Base64 encoding
+ str = str.split('=')[0]
+ // Node strips out invalid characters like \n and \t from the string, base64-js does not
+ str = str.trim().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 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
+}
+
+// ArrayBuffer or Uint8Array objects from other contexts (i.e. iframes) do not pass
+// the `instanceof` check but they should be treated as of that type.
+// See: https://github.com/feross/buffer/issues/166
+function isInstance (obj, type) {
+ return obj instanceof type ||
+ (obj != null && obj.constructor != null && obj.constructor.name != null &&
+ obj.constructor.name === type.name)
+}
+function numberIsNaN (obj) {
+ // For IE11 support
+ return obj !== obj // eslint-disable-line no-self-compare
+}
+
+// Create lookup table for `toString('hex')`
+// See: https://github.com/feross/buffer/issues/219
+var hexSliceLookupTable = (function () {
+ var alphabet = '0123456789abcdef'
+ var table = new Array(256)
+ for (var i = 0; i < 16; ++i) {
+ var i16 = i * 16
+ for (var j = 0; j < 16; ++j) {
+ table[i16 + j] = alphabet[i] + alphabet[j]
+ }
+ }
+ return table
+})()
diff --git a/node_modules/buffer/package.json b/node_modules/buffer/package.json
new file mode 100644
index 0000000000..3b1b4986f8
--- /dev/null
+++ b/node_modules/buffer/package.json
@@ -0,0 +1,96 @@
+{
+ "name": "buffer",
+ "description": "Node.js Buffer API, for the browser",
+ "version": "5.7.1",
+ "author": {
+ "name": "Feross Aboukhadijeh",
+ "email": "feross@feross.org",
+ "url": "https://feross.org"
+ },
+ "bugs": {
+ "url": "https://github.com/feross/buffer/issues"
+ },
+ "contributors": [
+ "Romain Beauxis ",
+ "James Halliday "
+ ],
+ "dependencies": {
+ "base64-js": "^1.3.1",
+ "ieee754": "^1.1.13"
+ },
+ "devDependencies": {
+ "airtap": "^3.0.0",
+ "benchmark": "^2.1.4",
+ "browserify": "^17.0.0",
+ "concat-stream": "^2.0.0",
+ "hyperquest": "^2.1.3",
+ "is-buffer": "^2.0.4",
+ "is-nan": "^1.3.0",
+ "split": "^1.0.1",
+ "standard": "*",
+ "tape": "^5.0.1",
+ "through2": "^4.0.2",
+ "uglify-js": "^3.11.3"
+ },
+ "homepage": "https://github.com/feross/buffer",
+ "jspm": {
+ "map": {
+ "./index.js": {
+ "node": "@node/buffer"
+ }
+ }
+ },
+ "keywords": [
+ "arraybuffer",
+ "browser",
+ "browserify",
+ "buffer",
+ "compatible",
+ "dataview",
+ "uint8array"
+ ],
+ "license": "MIT",
+ "main": "index.js",
+ "types": "index.d.ts",
+ "repository": {
+ "type": "git",
+ "url": "git://github.com/feross/buffer.git"
+ },
+ "scripts": {
+ "perf": "browserify --debug perf/bracket-notation.js > perf/bundle.js && open perf/index.html",
+ "perf-node": "node perf/bracket-notation.js && node perf/concat.js && node perf/copy-big.js && node perf/copy.js && node perf/new-big.js && node perf/new.js && node perf/readDoubleBE.js && node perf/readFloatBE.js && node perf/readUInt32LE.js && node perf/slice.js && node perf/writeFloatBE.js",
+ "size": "browserify -r ./ | uglifyjs -c -m | gzip | wc -c",
+ "test": "standard && node ./bin/test.js",
+ "test-browser-es5": "airtap -- test/*.js",
+ "test-browser-es5-local": "airtap --local -- test/*.js",
+ "test-browser-es6": "airtap -- test/*.js test/node/*.js",
+ "test-browser-es6-local": "airtap --local -- test/*.js test/node/*.js",
+ "test-node": "tape test/*.js test/node/*.js",
+ "update-authors": "./bin/update-authors.sh"
+ },
+ "standard": {
+ "ignore": [
+ "test/node/**/*.js",
+ "test/common.js",
+ "test/_polyfill.js",
+ "perf/**/*.js"
+ ],
+ "globals": [
+ "SharedArrayBuffer"
+ ]
+ },
+ "funding": [
+ {
+ "type": "github",
+ "url": "https://github.com/sponsors/feross"
+ },
+ {
+ "type": "patreon",
+ "url": "https://www.patreon.com/feross"
+ },
+ {
+ "type": "consulting",
+ "url": "https://feross.org/support"
+ }
+ ]
+}
diff --git a/node_modules/chalk/index.d.ts b/node_modules/chalk/index.d.ts
new file mode 100644
index 0000000000..9cd88f38be
--- /dev/null
+++ b/node_modules/chalk/index.d.ts
@@ -0,0 +1,415 @@
+/**
+Basic foreground colors.
+
+[More colors here.](https://github.com/chalk/chalk/blob/master/readme.md#256-and-truecolor-color-support)
+*/
+declare type ForegroundColor =
+ | 'black'
+ | 'red'
+ | 'green'
+ | 'yellow'
+ | 'blue'
+ | 'magenta'
+ | 'cyan'
+ | 'white'
+ | 'gray'
+ | 'grey'
+ | 'blackBright'
+ | 'redBright'
+ | 'greenBright'
+ | 'yellowBright'
+ | 'blueBright'
+ | 'magentaBright'
+ | 'cyanBright'
+ | 'whiteBright';
+
+/**
+Basic background colors.
+
+[More colors here.](https://github.com/chalk/chalk/blob/master/readme.md#256-and-truecolor-color-support)
+*/
+declare type BackgroundColor =
+ | 'bgBlack'
+ | 'bgRed'
+ | 'bgGreen'
+ | 'bgYellow'
+ | 'bgBlue'
+ | 'bgMagenta'
+ | 'bgCyan'
+ | 'bgWhite'
+ | 'bgGray'
+ | 'bgGrey'
+ | 'bgBlackBright'
+ | 'bgRedBright'
+ | 'bgGreenBright'
+ | 'bgYellowBright'
+ | 'bgBlueBright'
+ | 'bgMagentaBright'
+ | 'bgCyanBright'
+ | 'bgWhiteBright';
+
+/**
+Basic colors.
+
+[More colors here.](https://github.com/chalk/chalk/blob/master/readme.md#256-and-truecolor-color-support)
+*/
+declare type Color = ForegroundColor | BackgroundColor;
+
+declare type Modifiers =
+ | 'reset'
+ | 'bold'
+ | 'dim'
+ | 'italic'
+ | 'underline'
+ | 'inverse'
+ | 'hidden'
+ | 'strikethrough'
+ | 'visible';
+
+declare namespace chalk {
+ /**
+ Levels:
+ - `0` - All colors disabled.
+ - `1` - Basic 16 colors support.
+ - `2` - ANSI 256 colors support.
+ - `3` - Truecolor 16 million colors support.
+ */
+ type Level = 0 | 1 | 2 | 3;
+
+ interface Options {
+ /**
+ Specify the color support for Chalk.
+
+ By default, color support is automatically detected based on the environment.
+
+ Levels:
+ - `0` - All colors disabled.
+ - `1` - Basic 16 colors support.
+ - `2` - ANSI 256 colors support.
+ - `3` - Truecolor 16 million colors support.
+ */
+ level?: Level;
+ }
+
+ /**
+ Return a new Chalk instance.
+ */
+ type Instance = new (options?: Options) => Chalk;
+
+ /**
+ Detect whether the terminal supports color.
+ */
+ interface ColorSupport {
+ /**
+ The color level used by Chalk.
+ */
+ level: Level;
+
+ /**
+ Return whether Chalk supports basic 16 colors.
+ */
+ hasBasic: boolean;
+
+ /**
+ Return whether Chalk supports ANSI 256 colors.
+ */
+ has256: boolean;
+
+ /**
+ Return whether Chalk supports Truecolor 16 million colors.
+ */
+ has16m: boolean;
+ }
+
+ interface ChalkFunction {
+ /**
+ Use a template string.
+
+ @remarks Template literals are unsupported for nested calls (see [issue #341](https://github.com/chalk/chalk/issues/341))
+
+ @example
+ ```
+ import chalk = require('chalk');
+
+ log(chalk`
+ CPU: {red ${cpu.totalPercent}%}
+ RAM: {green ${ram.used / ram.total * 100}%}
+ DISK: {rgb(255,131,0) ${disk.used / disk.total * 100}%}
+ `);
+ ```
+
+ @example
+ ```
+ import chalk = require('chalk');
+
+ log(chalk.red.bgBlack`2 + 3 = {bold ${2 + 3}}`)
+ ```
+ */
+ (text: TemplateStringsArray, ...placeholders: unknown[]): string;
+
+ (...text: unknown[]): string;
+ }
+
+ interface Chalk extends ChalkFunction {
+ /**
+ Return a new Chalk instance.
+ */
+ Instance: Instance;
+
+ /**
+ The color support for Chalk.
+
+ By default, color support is automatically detected based on the environment.
+
+ Levels:
+ - `0` - All colors disabled.
+ - `1` - Basic 16 colors support.
+ - `2` - ANSI 256 colors support.
+ - `3` - Truecolor 16 million colors support.
+ */
+ level: Level;
+
+ /**
+ Use HEX value to set text color.
+
+ @param color - Hexadecimal value representing the desired color.
+
+ @example
+ ```
+ import chalk = require('chalk');
+
+ chalk.hex('#DEADED');
+ ```
+ */
+ hex(color: string): Chalk;
+
+ /**
+ Use keyword color value to set text color.
+
+ @param color - Keyword value representing the desired color.
+
+ @example
+ ```
+ import chalk = require('chalk');
+
+ chalk.keyword('orange');
+ ```
+ */
+ keyword(color: string): Chalk;
+
+ /**
+ Use RGB values to set text color.
+ */
+ rgb(red: number, green: number, blue: number): Chalk;
+
+ /**
+ Use HSL values to set text color.
+ */
+ hsl(hue: number, saturation: number, lightness: number): Chalk;
+
+ /**
+ Use HSV values to set text color.
+ */
+ hsv(hue: number, saturation: number, value: number): Chalk;
+
+ /**
+ Use HWB values to set text color.
+ */
+ hwb(hue: number, whiteness: number, blackness: number): Chalk;
+
+ /**
+ Use a [Select/Set Graphic Rendition](https://en.wikipedia.org/wiki/ANSI_escape_code#SGR_parameters) (SGR) [color code number](https://en.wikipedia.org/wiki/ANSI_escape_code#3/4_bit) to set text color.
+
+ 30 <= code && code < 38 || 90 <= code && code < 98
+ For example, 31 for red, 91 for redBright.
+ */
+ ansi(code: number): Chalk;
+
+ /**
+ Use a [8-bit unsigned number](https://en.wikipedia.org/wiki/ANSI_escape_code#8-bit) to set text color.
+ */
+ ansi256(index: number): Chalk;
+
+ /**
+ Use HEX value to set background color.
+
+ @param color - Hexadecimal value representing the desired color.
+
+ @example
+ ```
+ import chalk = require('chalk');
+
+ chalk.bgHex('#DEADED');
+ ```
+ */
+ bgHex(color: string): Chalk;
+
+ /**
+ Use keyword color value to set background color.
+
+ @param color - Keyword value representing the desired color.
+
+ @example
+ ```
+ import chalk = require('chalk');
+
+ chalk.bgKeyword('orange');
+ ```
+ */
+ bgKeyword(color: string): Chalk;
+
+ /**
+ Use RGB values to set background color.
+ */
+ bgRgb(red: number, green: number, blue: number): Chalk;
+
+ /**
+ Use HSL values to set background color.
+ */
+ bgHsl(hue: number, saturation: number, lightness: number): Chalk;
+
+ /**
+ Use HSV values to set background color.
+ */
+ bgHsv(hue: number, saturation: number, value: number): Chalk;
+
+ /**
+ Use HWB values to set background color.
+ */
+ bgHwb(hue: number, whiteness: number, blackness: number): Chalk;
+
+ /**
+ Use a [Select/Set Graphic Rendition](https://en.wikipedia.org/wiki/ANSI_escape_code#SGR_parameters) (SGR) [color code number](https://en.wikipedia.org/wiki/ANSI_escape_code#3/4_bit) to set background color.
+
+ 30 <= code && code < 38 || 90 <= code && code < 98
+ For example, 31 for red, 91 for redBright.
+ Use the foreground code, not the background code (for example, not 41, nor 101).
+ */
+ bgAnsi(code: number): Chalk;
+
+ /**
+ Use a [8-bit unsigned number](https://en.wikipedia.org/wiki/ANSI_escape_code#8-bit) to set background color.
+ */
+ bgAnsi256(index: number): Chalk;
+
+ /**
+ Modifier: Resets the current color chain.
+ */
+ readonly reset: Chalk;
+
+ /**
+ Modifier: Make text bold.
+ */
+ readonly bold: Chalk;
+
+ /**
+ Modifier: Emitting only a small amount of light.
+ */
+ readonly dim: Chalk;
+
+ /**
+ Modifier: Make text italic. (Not widely supported)
+ */
+ readonly italic: Chalk;
+
+ /**
+ Modifier: Make text underline. (Not widely supported)
+ */
+ readonly underline: Chalk;
+
+ /**
+ Modifier: Inverse background and foreground colors.
+ */
+ readonly inverse: Chalk;
+
+ /**
+ Modifier: Prints the text, but makes it invisible.
+ */
+ readonly hidden: Chalk;
+
+ /**
+ Modifier: Puts a horizontal line through the center of the text. (Not widely supported)
+ */
+ readonly strikethrough: Chalk;
+
+ /**
+ Modifier: Prints the text only when Chalk has a color support level > 0.
+ Can be useful for things that are purely cosmetic.
+ */
+ readonly visible: Chalk;
+
+ readonly black: Chalk;
+ readonly red: Chalk;
+ readonly green: Chalk;
+ readonly yellow: Chalk;
+ readonly blue: Chalk;
+ readonly magenta: Chalk;
+ readonly cyan: Chalk;
+ readonly white: Chalk;
+
+ /*
+ Alias for `blackBright`.
+ */
+ readonly gray: Chalk;
+
+ /*
+ Alias for `blackBright`.
+ */
+ readonly grey: Chalk;
+
+ readonly blackBright: Chalk;
+ readonly redBright: Chalk;
+ readonly greenBright: Chalk;
+ readonly yellowBright: Chalk;
+ readonly blueBright: Chalk;
+ readonly magentaBright: Chalk;
+ readonly cyanBright: Chalk;
+ readonly whiteBright: Chalk;
+
+ readonly bgBlack: Chalk;
+ readonly bgRed: Chalk;
+ readonly bgGreen: Chalk;
+ readonly bgYellow: Chalk;
+ readonly bgBlue: Chalk;
+ readonly bgMagenta: Chalk;
+ readonly bgCyan: Chalk;
+ readonly bgWhite: Chalk;
+
+ /*
+ Alias for `bgBlackBright`.
+ */
+ readonly bgGray: Chalk;
+
+ /*
+ Alias for `bgBlackBright`.
+ */
+ readonly bgGrey: Chalk;
+
+ readonly bgBlackBright: Chalk;
+ readonly bgRedBright: Chalk;
+ readonly bgGreenBright: Chalk;
+ readonly bgYellowBright: Chalk;
+ readonly bgBlueBright: Chalk;
+ readonly bgMagentaBright: Chalk;
+ readonly bgCyanBright: Chalk;
+ readonly bgWhiteBright: Chalk;
+ }
+}
+
+/**
+Main Chalk object that allows to chain styles together.
+Call the last one as a method with a string argument.
+Order doesn't matter, and later styles take precedent in case of a conflict.
+This simply means that `chalk.red.yellow.green` is equivalent to `chalk.green`.
+*/
+declare const chalk: chalk.Chalk & chalk.ChalkFunction & {
+ supportsColor: chalk.ColorSupport | false;
+ Level: chalk.Level;
+ Color: Color;
+ ForegroundColor: ForegroundColor;
+ BackgroundColor: BackgroundColor;
+ Modifiers: Modifiers;
+ stderr: chalk.Chalk & {supportsColor: chalk.ColorSupport | false};
+};
+
+export = chalk;
diff --git a/node_modules/chalk/license b/node_modules/chalk/license
new file mode 100644
index 0000000000..e7af2f7710
--- /dev/null
+++ b/node_modules/chalk/license
@@ -0,0 +1,9 @@
+MIT License
+
+Copyright (c) Sindre Sorhus (sindresorhus.com)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/node_modules/chalk/package.json b/node_modules/chalk/package.json
new file mode 100644
index 0000000000..47c23f2906
--- /dev/null
+++ b/node_modules/chalk/package.json
@@ -0,0 +1,68 @@
+{
+ "name": "chalk",
+ "version": "4.1.2",
+ "description": "Terminal string styling done right",
+ "license": "MIT",
+ "repository": "chalk/chalk",
+ "funding": "https://github.com/chalk/chalk?sponsor=1",
+ "main": "source",
+ "engines": {
+ "node": ">=10"
+ },
+ "scripts": {
+ "test": "xo && nyc ava && tsd",
+ "bench": "matcha benchmark.js"
+ },
+ "files": [
+ "source",
+ "index.d.ts"
+ ],
+ "keywords": [
+ "color",
+ "colour",
+ "colors",
+ "terminal",
+ "console",
+ "cli",
+ "string",
+ "str",
+ "ansi",
+ "style",
+ "styles",
+ "tty",
+ "formatting",
+ "rgb",
+ "256",
+ "shell",
+ "xterm",
+ "log",
+ "logging",
+ "command-line",
+ "text"
+ ],
+ "dependencies": {
+ "ansi-styles": "^4.1.0",
+ "supports-color": "^7.1.0"
+ },
+ "devDependencies": {
+ "ava": "^2.4.0",
+ "coveralls": "^3.0.7",
+ "execa": "^4.0.0",
+ "import-fresh": "^3.1.0",
+ "matcha": "^0.7.0",
+ "nyc": "^15.0.0",
+ "resolve-from": "^5.0.0",
+ "tsd": "^0.7.4",
+ "xo": "^0.28.2"
+ },
+ "xo": {
+ "rules": {
+ "unicorn/prefer-string-slice": "off",
+ "unicorn/prefer-includes": "off",
+ "@typescript-eslint/member-ordering": "off",
+ "no-redeclare": "off",
+ "unicorn/string-content": "off",
+ "unicorn/better-regex": "off"
+ }
+ }
+}
diff --git a/node_modules/chalk/readme.md b/node_modules/chalk/readme.md
new file mode 100644
index 0000000000..a055d21c97
--- /dev/null
+++ b/node_modules/chalk/readme.md
@@ -0,0 +1,341 @@
+
+
+
+
+
+
+
+
+
+> Terminal string styling done right
+
+[](https://travis-ci.org/chalk/chalk) [](https://coveralls.io/github/chalk/chalk?branch=master) [](https://www.npmjs.com/package/chalk?activeTab=dependents) [](https://www.npmjs.com/package/chalk) [](https://www.youtube.com/watch?v=9auOCbH5Ns4) [](https://github.com/xojs/xo)  [](https://repl.it/github/chalk/chalk)
+
+
+
+
+
+---
+
+
+
+---
+
+
+
+## Highlights
+
+- Expressive API
+- Highly performant
+- Ability to nest styles
+- [256/Truecolor color support](#256-and-truecolor-color-support)
+- Auto-detects color support
+- Doesn't extend `String.prototype`
+- Clean and focused
+- Actively maintained
+- [Used by ~50,000 packages](https://www.npmjs.com/browse/depended/chalk) as of January 1, 2020
+
+## Install
+
+```console
+$ npm install chalk
+```
+
+## Usage
+
+```js
+const chalk = require('chalk');
+
+console.log(chalk.blue('Hello world!'));
+```
+
+Chalk comes with an easy to use composable API where you just chain and nest the styles you want.
+
+```js
+const chalk = require('chalk');
+const log = console.log;
+
+// Combine styled and normal strings
+log(chalk.blue('Hello') + ' World' + chalk.red('!'));
+
+// Compose multiple styles using the chainable API
+log(chalk.blue.bgRed.bold('Hello world!'));
+
+// Pass in multiple arguments
+log(chalk.blue('Hello', 'World!', 'Foo', 'bar', 'biz', 'baz'));
+
+// Nest styles
+log(chalk.red('Hello', chalk.underline.bgBlue('world') + '!'));
+
+// Nest styles of the same type even (color, underline, background)
+log(chalk.green(
+ 'I am a green line ' +
+ chalk.blue.underline.bold('with a blue substring') +
+ ' that becomes green again!'
+));
+
+// ES2015 template literal
+log(`
+CPU: ${chalk.red('90%')}
+RAM: ${chalk.green('40%')}
+DISK: ${chalk.yellow('70%')}
+`);
+
+// ES2015 tagged template literal
+log(chalk`
+CPU: {red ${cpu.totalPercent}%}
+RAM: {green ${ram.used / ram.total * 100}%}
+DISK: {rgb(255,131,0) ${disk.used / disk.total * 100}%}
+`);
+
+// Use RGB colors in terminal emulators that support it.
+log(chalk.keyword('orange')('Yay for orange colored text!'));
+log(chalk.rgb(123, 45, 67).underline('Underlined reddish color'));
+log(chalk.hex('#DEADED').bold('Bold gray!'));
+```
+
+Easily define your own themes:
+
+```js
+const chalk = require('chalk');
+
+const error = chalk.bold.red;
+const warning = chalk.keyword('orange');
+
+console.log(error('Error!'));
+console.log(warning('Warning!'));
+```
+
+Take advantage of console.log [string substitution](https://nodejs.org/docs/latest/api/console.html#console_console_log_data_args):
+
+```js
+const name = 'Sindre';
+console.log(chalk.green('Hello %s'), name);
+//=> 'Hello Sindre'
+```
+
+## API
+
+### chalk.`