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Example Browserify and Webpack output referencing `process` and `Buffer`
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if (process.browser) { | |
module.exports = function (string) { | |
return btoa(string); | |
}; | |
} else { | |
module.exports = function (string) { | |
return Buffer.from(string, 'binary').toString('base64'); | |
}; | |
} |
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(function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){ | |
'use strict' | |
exports.byteLength = byteLength | |
exports.toByteArray = toByteArray | |
exports.fromByteArray = fromByteArray | |
var lookup = [] | |
var revLookup = [] | |
var Arr = typeof Uint8Array !== 'undefined' ? Uint8Array : Array | |
var code = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/' | |
for (var i = 0, len = code.length; i < len; ++i) { | |
lookup[i] = code[i] | |
revLookup[code.charCodeAt(i)] = i | |
} | |
revLookup['-'.charCodeAt(0)] = 62 | |
revLookup['_'.charCodeAt(0)] = 63 | |
function placeHoldersCount (b64) { | |
var len = b64.length | |
if (len % 4 > 0) { | |
throw new Error('Invalid string. Length must be a multiple of 4') | |
} | |
// the number of equal signs (place holders) | |
// if there are two placeholders, than the two characters before it | |
// represent one byte | |
// if there is only one, then the three characters before it represent 2 bytes | |
// this is just a cheap hack to not do indexOf twice | |
return b64[len - 2] === '=' ? 2 : b64[len - 1] === '=' ? 1 : 0 | |
} | |
function byteLength (b64) { | |
// base64 is 4/3 + up to two characters of the original data | |
return b64.length * 3 / 4 - placeHoldersCount(b64) | |
} | |
function toByteArray (b64) { | |
var i, j, l, tmp, placeHolders, arr | |
var len = b64.length | |
placeHolders = placeHoldersCount(b64) | |
arr = new Arr(len * 3 / 4 - placeHolders) | |
// if there are placeholders, only get up to the last complete 4 chars | |
l = placeHolders > 0 ? len - 4 : len | |
var L = 0 | |
for (i = 0, j = 0; i < l; i += 4, j += 3) { | |
tmp = (revLookup[b64.charCodeAt(i)] << 18) | (revLookup[b64.charCodeAt(i + 1)] << 12) | (revLookup[b64.charCodeAt(i + 2)] << 6) | revLookup[b64.charCodeAt(i + 3)] | |
arr[L++] = (tmp >> 16) & 0xFF | |
arr[L++] = (tmp >> 8) & 0xFF | |
arr[L++] = tmp & 0xFF | |
} | |
if (placeHolders === 2) { | |
tmp = (revLookup[b64.charCodeAt(i)] << 2) | (revLookup[b64.charCodeAt(i + 1)] >> 4) | |
arr[L++] = tmp & 0xFF | |
} else if (placeHolders === 1) { | |
tmp = (revLookup[b64.charCodeAt(i)] << 10) | (revLookup[b64.charCodeAt(i + 1)] << 4) | (revLookup[b64.charCodeAt(i + 2)] >> 2) | |
arr[L++] = (tmp >> 8) & 0xFF | |
arr[L++] = 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) + (uint8[i + 1] << 8) + (uint8[i + 2]) | |
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 output = '' | |
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] | |
output += lookup[tmp >> 2] | |
output += lookup[(tmp << 4) & 0x3F] | |
output += '==' | |
} else if (extraBytes === 2) { | |
tmp = (uint8[len - 2] << 8) + (uint8[len - 1]) | |
output += lookup[tmp >> 10] | |
output += lookup[(tmp >> 4) & 0x3F] | |
output += lookup[(tmp << 2) & 0x3F] | |
output += '=' | |
} | |
parts.push(output) | |
return parts.join('') | |
} | |
},{}],2:[function(require,module,exports){ | |
(function (global){ | |
/*! | |
* The buffer module from node.js, for the browser. | |
* | |
* @author Feross Aboukhadijeh <feross@feross.org> <http://feross.org> | |
* @license MIT | |
*/ | |
/* eslint-disable no-proto */ | |
'use strict' | |
var base64 = require('base64-js') | |
var ieee754 = require('ieee754') | |
var isArray = require('isarray') | |
exports.Buffer = Buffer | |
exports.SlowBuffer = SlowBuffer | |
exports.INSPECT_MAX_BYTES = 50 | |
/** | |
* If `Buffer.TYPED_ARRAY_SUPPORT`: | |
* === true Use Uint8Array implementation (fastest) | |
* === false Use Object implementation (most compatible, even IE6) | |
* | |
* Browsers that support typed arrays are IE 10+, Firefox 4+, Chrome 7+, Safari 5.1+, | |
* Opera 11.6+, iOS 4.2+. | |
* | |
* Due to various browser bugs, sometimes the Object implementation will be used even | |
* when the browser supports typed arrays. | |
* | |
* Note: | |
* | |
* - Firefox 4-29 lacks support for adding new properties to `Uint8Array` instances, | |
* See: https://bugzilla.mozilla.org/show_bug.cgi?id=695438. | |
* | |
* - Chrome 9-10 is missing the `TypedArray.prototype.subarray` function. | |
* | |
* - IE10 has a broken `TypedArray.prototype.subarray` function which returns arrays of | |
* incorrect length in some situations. | |
* We detect these buggy browsers and set `Buffer.TYPED_ARRAY_SUPPORT` to `false` so they | |
* get the Object implementation, which is slower but behaves correctly. | |
*/ | |
Buffer.TYPED_ARRAY_SUPPORT = global.TYPED_ARRAY_SUPPORT !== undefined | |
? global.TYPED_ARRAY_SUPPORT | |
: typedArraySupport() | |
/* | |
* Export kMaxLength after typed array support is determined. | |
*/ | |
exports.kMaxLength = kMaxLength() | |
function typedArraySupport () { | |
try { | |
var arr = new Uint8Array(1) | |
arr.__proto__ = {__proto__: Uint8Array.prototype, foo: function () { return 42 }} | |
return arr.foo() === 42 && // typed array instances can be augmented | |
typeof arr.subarray === 'function' && // chrome 9-10 lack `subarray` | |
arr.subarray(1, 1).byteLength === 0 // ie10 has broken `subarray` | |
} catch (e) { | |
return false | |
} | |
} | |
function kMaxLength () { | |
return Buffer.TYPED_ARRAY_SUPPORT | |
? 0x7fffffff | |
: 0x3fffffff | |
} | |
function createBuffer (that, length) { | |
if (kMaxLength() < length) { | |
throw new RangeError('Invalid typed array length') | |
} | |
if (Buffer.TYPED_ARRAY_SUPPORT) { | |
// Return an augmented `Uint8Array` instance, for best performance | |
that = new Uint8Array(length) | |
that.__proto__ = Buffer.prototype | |
} else { | |
// Fallback: Return an object instance of the Buffer class | |
if (that === null) { | |
that = new Buffer(length) | |
} | |
that.length = length | |
} | |
return that | |
} | |
/** | |
* The Buffer constructor returns instances of `Uint8Array` that have their | |
* prototype changed to `Buffer.prototype`. Furthermore, `Buffer` is a subclass of | |
* `Uint8Array`, so the returned instances will have all the node `Buffer` methods | |
* and the `Uint8Array` methods. Square bracket notation works as expected -- it | |
* returns a single octet. | |
* | |
* The `Uint8Array` prototype remains unmodified. | |
*/ | |
function Buffer (arg, encodingOrOffset, length) { | |
if (!Buffer.TYPED_ARRAY_SUPPORT && !(this instanceof Buffer)) { | |
return new Buffer(arg, encodingOrOffset, length) | |
} | |
// Common case. | |
if (typeof arg === 'number') { | |
if (typeof encodingOrOffset === 'string') { | |
throw new Error( | |
'If encoding is specified then the first argument must be a string' | |
) | |
} | |
return allocUnsafe(this, arg) | |
} | |
return from(this, arg, encodingOrOffset, length) | |
} | |
Buffer.poolSize = 8192 // not used by this implementation | |
// TODO: Legacy, not needed anymore. Remove in next major version. | |
Buffer._augment = function (arr) { | |
arr.__proto__ = Buffer.prototype | |
return arr | |
} | |
function from (that, value, encodingOrOffset, length) { | |
if (typeof value === 'number') { | |
throw new TypeError('"value" argument must not be a number') | |
} | |
if (typeof ArrayBuffer !== 'undefined' && value instanceof ArrayBuffer) { | |
return fromArrayBuffer(that, value, encodingOrOffset, length) | |
} | |
if (typeof value === 'string') { | |
return fromString(that, value, encodingOrOffset) | |
} | |
return fromObject(that, value) | |
} | |
/** | |
* Functionally equivalent to Buffer(arg, encoding) but throws a TypeError | |
* if value is a number. | |
* Buffer.from(str[, encoding]) | |
* Buffer.from(array) | |
* Buffer.from(buffer) | |
* Buffer.from(arrayBuffer[, byteOffset[, length]]) | |
**/ | |
Buffer.from = function (value, encodingOrOffset, length) { | |
return from(null, value, encodingOrOffset, length) | |
} | |
if (Buffer.TYPED_ARRAY_SUPPORT) { | |
Buffer.prototype.__proto__ = Uint8Array.prototype | |
Buffer.__proto__ = Uint8Array | |
if (typeof Symbol !== 'undefined' && Symbol.species && | |
Buffer[Symbol.species] === Buffer) { | |
// Fix subarray() in ES2016. See: https://github.com/feross/buffer/pull/97 | |
Object.defineProperty(Buffer, Symbol.species, { | |
value: null, | |
configurable: true | |
}) | |
} | |
} | |
function assertSize (size) { | |
if (typeof size !== 'number') { | |
throw new TypeError('"size" argument must be a number') | |
} else if (size < 0) { | |
throw new RangeError('"size" argument must not be negative') | |
} | |
} | |
function alloc (that, size, fill, encoding) { | |
assertSize(size) | |
if (size <= 0) { | |
return createBuffer(that, size) | |
} | |
if (fill !== undefined) { | |
// Only pay attention to encoding if it's a string. This | |
// prevents accidentally sending in a number that would | |
// be interpretted as a start offset. | |
return typeof encoding === 'string' | |
? createBuffer(that, size).fill(fill, encoding) | |
: createBuffer(that, size).fill(fill) | |
} | |
return createBuffer(that, size) | |
} | |
/** | |
* Creates a new filled Buffer instance. | |
* alloc(size[, fill[, encoding]]) | |
**/ | |
Buffer.alloc = function (size, fill, encoding) { | |
return alloc(null, size, fill, encoding) | |
} | |
function allocUnsafe (that, size) { | |
assertSize(size) | |
that = createBuffer(that, size < 0 ? 0 : checked(size) | 0) | |
if (!Buffer.TYPED_ARRAY_SUPPORT) { | |
for (var i = 0; i < size; ++i) { | |
that[i] = 0 | |
} | |
} | |
return that | |
} | |
/** | |
* Equivalent to Buffer(num), by default creates a non-zero-filled Buffer instance. | |
* */ | |
Buffer.allocUnsafe = function (size) { | |
return allocUnsafe(null, size) | |
} | |
/** | |
* Equivalent to SlowBuffer(num), by default creates a non-zero-filled Buffer instance. | |
*/ | |
Buffer.allocUnsafeSlow = function (size) { | |
return allocUnsafe(null, size) | |
} | |
function fromString (that, string, encoding) { | |
if (typeof encoding !== 'string' || encoding === '') { | |
encoding = 'utf8' | |
} | |
if (!Buffer.isEncoding(encoding)) { | |
throw new TypeError('"encoding" must be a valid string encoding') | |
} | |
var length = byteLength(string, encoding) | 0 | |
that = createBuffer(that, length) | |
var actual = that.write(string, encoding) | |
if (actual !== length) { | |
// Writing a hex string, for example, that contains invalid characters will | |
// cause everything after the first invalid character to be ignored. (e.g. | |
// 'abxxcd' will be treated as 'ab') | |
that = that.slice(0, actual) | |
} | |
return that | |
} | |
function fromArrayLike (that, array) { | |
var length = array.length < 0 ? 0 : checked(array.length) | 0 | |
that = createBuffer(that, length) | |
for (var i = 0; i < length; i += 1) { | |
that[i] = array[i] & 255 | |
} | |
return that | |
} | |
function fromArrayBuffer (that, array, byteOffset, length) { | |
array.byteLength // this throws if `array` is not a valid ArrayBuffer | |
if (byteOffset < 0 || array.byteLength < byteOffset) { | |
throw new RangeError('\'offset\' is out of bounds') | |
} | |
if (array.byteLength < byteOffset + (length || 0)) { | |
throw new RangeError('\'length\' is out of bounds') | |
} | |
if (byteOffset === undefined && length === undefined) { | |
array = new Uint8Array(array) | |
} else if (length === undefined) { | |
array = new Uint8Array(array, byteOffset) | |
} else { | |
array = new Uint8Array(array, byteOffset, length) | |
} | |
if (Buffer.TYPED_ARRAY_SUPPORT) { | |
// Return an augmented `Uint8Array` instance, for best performance | |
that = array | |
that.__proto__ = Buffer.prototype | |
} else { | |
// Fallback: Return an object instance of the Buffer class | |
that = fromArrayLike(that, array) | |
} | |
return that | |
} | |
function fromObject (that, obj) { | |
if (Buffer.isBuffer(obj)) { | |
var len = checked(obj.length) | 0 | |
that = createBuffer(that, len) | |
if (that.length === 0) { | |
return that | |
} | |
obj.copy(that, 0, 0, len) | |
return that | |
} | |
if (obj) { | |
if ((typeof ArrayBuffer !== 'undefined' && | |
obj.buffer instanceof ArrayBuffer) || 'length' in obj) { | |
if (typeof obj.length !== 'number' || isnan(obj.length)) { | |
return createBuffer(that, 0) | |
} | |
return fromArrayLike(that, obj) | |
} | |
if (obj.type === 'Buffer' && isArray(obj.data)) { | |
return fromArrayLike(that, obj.data) | |
} | |
} | |
throw new TypeError('First argument must be a string, Buffer, ArrayBuffer, Array, or array-like object.') | |
} | |
function checked (length) { | |
// Note: cannot use `length < kMaxLength()` here because that fails when | |
// length is NaN (which is otherwise coerced to zero.) | |
if (length >= kMaxLength()) { | |
throw new RangeError('Attempt to allocate Buffer larger than maximum ' + | |
'size: 0x' + kMaxLength().toString(16) + ' bytes') | |
} | |
return length | 0 | |
} | |
function SlowBuffer (length) { | |
if (+length != length) { // eslint-disable-line eqeqeq | |
length = 0 | |
} | |
return Buffer.alloc(+length) | |
} | |
Buffer.isBuffer = function isBuffer (b) { | |
return !!(b != null && b._isBuffer) | |
} | |
Buffer.compare = function compare (a, b) { | |
if (!Buffer.isBuffer(a) || !Buffer.isBuffer(b)) { | |
throw new TypeError('Arguments must be Buffers') | |
} | |
if (a === b) return 0 | |
var x = a.length | |
var y = b.length | |
for (var i = 0, len = Math.min(x, y); i < len; ++i) { | |
if (a[i] !== b[i]) { | |
x = a[i] | |
y = b[i] | |
break | |
} | |
} | |
if (x < y) return -1 | |
if (y < x) return 1 | |
return 0 | |
} | |
Buffer.isEncoding = function isEncoding (encoding) { | |
switch (String(encoding).toLowerCase()) { | |
case 'hex': | |
case 'utf8': | |
case 'utf-8': | |
case 'ascii': | |
case 'latin1': | |
case 'binary': | |
case 'base64': | |
case 'ucs2': | |
case 'ucs-2': | |
case 'utf16le': | |
case 'utf-16le': | |
return true | |
default: | |
return false | |
} | |
} | |
Buffer.concat = function concat (list, length) { | |
if (!isArray(list)) { | |
throw new TypeError('"list" argument must be an Array of Buffers') | |
} | |
if (list.length === 0) { | |
return Buffer.alloc(0) | |
} | |
var i | |
if (length === undefined) { | |
length = 0 | |
for (i = 0; i < list.length; ++i) { | |
length += list[i].length | |
} | |
} | |
var buffer = Buffer.allocUnsafe(length) | |
var pos = 0 | |
for (i = 0; i < list.length; ++i) { | |
var buf = list[i] | |
if (!Buffer.isBuffer(buf)) { | |
throw new TypeError('"list" argument must be an Array of Buffers') | |
} | |
buf.copy(buffer, pos) | |
pos += buf.length | |
} | |
return buffer | |
} | |
function byteLength (string, encoding) { | |
if (Buffer.isBuffer(string)) { | |
return string.length | |
} | |
if (typeof ArrayBuffer !== 'undefined' && typeof ArrayBuffer.isView === 'function' && | |
(ArrayBuffer.isView(string) || string instanceof ArrayBuffer)) { | |
return string.byteLength | |
} | |
if (typeof string !== 'string') { | |
string = '' + string | |
} | |
var len = string.length | |
if (len === 0) return 0 | |
// Use a for loop to avoid recursion | |
var loweredCase = false | |
for (;;) { | |
switch (encoding) { | |
case 'ascii': | |
case 'latin1': | |
case 'binary': | |
return len | |
case 'utf8': | |
case 'utf-8': | |
case undefined: | |
return utf8ToBytes(string).length | |
case 'ucs2': | |
case 'ucs-2': | |
case 'utf16le': | |
case 'utf-16le': | |
return len * 2 | |
case 'hex': | |
return len >>> 1 | |
case 'base64': | |
return base64ToBytes(string).length | |
default: | |
if (loweredCase) return utf8ToBytes(string).length // assume utf8 | |
encoding = ('' + encoding).toLowerCase() | |
loweredCase = true | |
} | |
} | |
} | |
Buffer.byteLength = byteLength | |
function slowToString (encoding, start, end) { | |
var loweredCase = false | |
// No need to verify that "this.length <= MAX_UINT32" since it's a read-only | |
// property of a typed array. | |
// This behaves neither like String nor Uint8Array in that we set start/end | |
// to their upper/lower bounds if the value passed is out of range. | |
// undefined is handled specially as per ECMA-262 6th Edition, | |
// Section 13.3.3.7 Runtime Semantics: KeyedBindingInitialization. | |
if (start === undefined || start < 0) { | |
start = 0 | |
} | |
// Return early if start > this.length. Done here to prevent potential uint32 | |
// coercion fail below. | |
if (start > this.length) { | |
return '' | |
} | |
if (end === undefined || end > this.length) { | |
end = this.length | |
} | |
if (end <= 0) { | |
return '' | |
} | |
// Force coersion to uint32. This will also coerce falsey/NaN values to 0. | |
end >>>= 0 | |
start >>>= 0 | |
if (end <= start) { | |
return '' | |
} | |
if (!encoding) encoding = 'utf8' | |
while (true) { | |
switch (encoding) { | |
case 'hex': | |
return hexSlice(this, start, end) | |
case 'utf8': | |
case 'utf-8': | |
return utf8Slice(this, start, end) | |
case 'ascii': | |
return asciiSlice(this, start, end) | |
case 'latin1': | |
case 'binary': | |
return latin1Slice(this, start, end) | |
case 'base64': | |
return base64Slice(this, start, end) | |
case 'ucs2': | |
case 'ucs-2': | |
case 'utf16le': | |
case 'utf-16le': | |
return utf16leSlice(this, start, end) | |
default: | |
if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding) | |
encoding = (encoding + '').toLowerCase() | |
loweredCase = true | |
} | |
} | |
} | |
// The property is used by `Buffer.isBuffer` and `is-buffer` (in Safari 5-7) to detect | |
// Buffer instances. | |
Buffer.prototype._isBuffer = true | |
function swap (b, n, m) { | |
var i = b[n] | |
b[n] = b[m] | |
b[m] = i | |
} | |
Buffer.prototype.swap16 = function swap16 () { | |
var len = this.length | |
if (len % 2 !== 0) { | |
throw new RangeError('Buffer size must be a multiple of 16-bits') | |
} | |
for (var i = 0; i < len; i += 2) { | |
swap(this, i, i + 1) | |
} | |
return this | |
} | |
Buffer.prototype.swap32 = function swap32 () { | |
var len = this.length | |
if (len % 4 !== 0) { | |
throw new RangeError('Buffer size must be a multiple of 32-bits') | |
} | |
for (var i = 0; i < len; i += 4) { | |
swap(this, i, i + 3) | |
swap(this, i + 1, i + 2) | |
} | |
return this | |
} | |
Buffer.prototype.swap64 = function swap64 () { | |
var len = this.length | |
if (len % 8 !== 0) { | |
throw new RangeError('Buffer size must be a multiple of 64-bits') | |
} | |
for (var i = 0; i < len; i += 8) { | |
swap(this, i, i + 7) | |
swap(this, i + 1, i + 6) | |
swap(this, i + 2, i + 5) | |
swap(this, i + 3, i + 4) | |
} | |
return this | |
} | |
Buffer.prototype.toString = function toString () { | |
var length = this.length | 0 | |
if (length === 0) return '' | |
if (arguments.length === 0) return utf8Slice(this, 0, length) | |
return slowToString.apply(this, arguments) | |
} | |
Buffer.prototype.equals = function equals (b) { | |
if (!Buffer.isBuffer(b)) throw new TypeError('Argument must be a Buffer') | |
if (this === b) return true | |
return Buffer.compare(this, b) === 0 | |
} | |
Buffer.prototype.inspect = function inspect () { | |
var str = '' | |
var max = exports.INSPECT_MAX_BYTES | |
if (this.length > 0) { | |
str = this.toString('hex', 0, max).match(/.{2}/g).join(' ') | |
if (this.length > max) str += ' ... ' | |
} | |
return '<Buffer ' + str + '>' | |
} | |
Buffer.prototype.compare = function compare (target, start, end, thisStart, thisEnd) { | |
if (!Buffer.isBuffer(target)) { | |
throw new TypeError('Argument must be a Buffer') | |
} | |
if (start === undefined) { | |
start = 0 | |
} | |
if (end === undefined) { | |
end = target ? target.length : 0 | |
} | |
if (thisStart === undefined) { | |
thisStart = 0 | |
} | |
if (thisEnd === undefined) { | |
thisEnd = this.length | |
} | |
if (start < 0 || end > target.length || thisStart < 0 || thisEnd > this.length) { | |
throw new RangeError('out of range index') | |
} | |
if (thisStart >= thisEnd && start >= end) { | |
return 0 | |
} | |
if (thisStart >= thisEnd) { | |
return -1 | |
} | |
if (start >= end) { | |
return 1 | |
} | |
start >>>= 0 | |
end >>>= 0 | |
thisStart >>>= 0 | |
thisEnd >>>= 0 | |
if (this === target) return 0 | |
var x = thisEnd - thisStart | |
var y = end - start | |
var len = Math.min(x, y) | |
var thisCopy = this.slice(thisStart, thisEnd) | |
var targetCopy = target.slice(start, end) | |
for (var i = 0; i < len; ++i) { | |
if (thisCopy[i] !== targetCopy[i]) { | |
x = thisCopy[i] | |
y = targetCopy[i] | |
break | |
} | |
} | |
if (x < y) return -1 | |
if (y < x) return 1 | |
return 0 | |
} | |
// Finds either the first index of `val` in `buffer` at offset >= `byteOffset`, | |
// OR the last index of `val` in `buffer` at offset <= `byteOffset`. | |
// | |
// Arguments: | |
// - buffer - a Buffer to search | |
// - val - a string, Buffer, or number | |
// - byteOffset - an index into `buffer`; will be clamped to an int32 | |
// - encoding - an optional encoding, relevant is val is a string | |
// - dir - true for indexOf, false for lastIndexOf | |
function bidirectionalIndexOf (buffer, val, byteOffset, encoding, dir) { | |
// Empty buffer means no match | |
if (buffer.length === 0) return -1 | |
// Normalize byteOffset | |
if (typeof byteOffset === 'string') { | |
encoding = byteOffset | |
byteOffset = 0 | |
} else if (byteOffset > 0x7fffffff) { | |
byteOffset = 0x7fffffff | |
} else if (byteOffset < -0x80000000) { | |
byteOffset = -0x80000000 | |
} | |
byteOffset = +byteOffset // Coerce to Number. | |
if (isNaN(byteOffset)) { | |
// byteOffset: it it's undefined, null, NaN, "foo", etc, search whole buffer | |
byteOffset = dir ? 0 : (buffer.length - 1) | |
} | |
// Normalize byteOffset: negative offsets start from the end of the buffer | |
if (byteOffset < 0) byteOffset = buffer.length + byteOffset | |
if (byteOffset >= buffer.length) { | |
if (dir) return -1 | |
else byteOffset = buffer.length - 1 | |
} else if (byteOffset < 0) { | |
if (dir) byteOffset = 0 | |
else return -1 | |
} | |
// Normalize val | |
if (typeof val === 'string') { | |
val = Buffer.from(val, encoding) | |
} | |
// Finally, search either indexOf (if dir is true) or lastIndexOf | |
if (Buffer.isBuffer(val)) { | |
// Special case: looking for empty string/buffer always fails | |
if (val.length === 0) { | |
return -1 | |
} | |
return arrayIndexOf(buffer, val, byteOffset, encoding, dir) | |
} else if (typeof val === 'number') { | |
val = val & 0xFF // Search for a byte value [0-255] | |
if (Buffer.TYPED_ARRAY_SUPPORT && | |
typeof Uint8Array.prototype.indexOf === 'function') { | |
if (dir) { | |
return Uint8Array.prototype.indexOf.call(buffer, val, byteOffset) | |
} else { | |
return Uint8Array.prototype.lastIndexOf.call(buffer, val, byteOffset) | |
} | |
} | |
return arrayIndexOf(buffer, [ val ], byteOffset, encoding, dir) | |
} | |
throw new TypeError('val must be string, number or Buffer') | |
} | |
function arrayIndexOf (arr, val, byteOffset, encoding, dir) { | |
var indexSize = 1 | |
var arrLength = arr.length | |
var valLength = val.length | |
if (encoding !== undefined) { | |
encoding = String(encoding).toLowerCase() | |
if (encoding === 'ucs2' || encoding === 'ucs-2' || | |
encoding === 'utf16le' || encoding === 'utf-16le') { | |
if (arr.length < 2 || val.length < 2) { | |
return -1 | |
} | |
indexSize = 2 | |
arrLength /= 2 | |
valLength /= 2 | |
byteOffset /= 2 | |
} | |
} | |
function read (buf, i) { | |
if (indexSize === 1) { | |
return buf[i] | |
} else { | |
return buf.readUInt16BE(i * indexSize) | |
} | |
} | |
var i | |
if (dir) { | |
var foundIndex = -1 | |
for (i = byteOffset; i < arrLength; i++) { | |
if (read(arr, i) === read(val, foundIndex === -1 ? 0 : i - foundIndex)) { | |
if (foundIndex === -1) foundIndex = i | |
if (i - foundIndex + 1 === valLength) return foundIndex * indexSize | |
} else { | |
if (foundIndex !== -1) i -= i - foundIndex | |
foundIndex = -1 | |
} | |
} | |
} else { | |
if (byteOffset + valLength > arrLength) byteOffset = arrLength - valLength | |
for (i = byteOffset; i >= 0; i--) { | |
var found = true | |
for (var j = 0; j < valLength; j++) { | |
if (read(arr, i + j) !== read(val, j)) { | |
found = false | |
break | |
} | |
} | |
if (found) return i | |
} | |
} | |
return -1 | |
} | |
Buffer.prototype.includes = function includes (val, byteOffset, encoding) { | |
return this.indexOf(val, byteOffset, encoding) !== -1 | |
} | |
Buffer.prototype.indexOf = function indexOf (val, byteOffset, encoding) { | |
return bidirectionalIndexOf(this, val, byteOffset, encoding, true) | |
} | |
Buffer.prototype.lastIndexOf = function lastIndexOf (val, byteOffset, encoding) { | |
return bidirectionalIndexOf(this, val, byteOffset, encoding, false) | |
} | |
function hexWrite (buf, string, offset, length) { | |
offset = Number(offset) || 0 | |
var remaining = buf.length - offset | |
if (!length) { | |
length = remaining | |
} else { | |
length = Number(length) | |
if (length > remaining) { | |
length = remaining | |
} | |
} | |
// must be an even number of digits | |
var strLen = string.length | |
if (strLen % 2 !== 0) throw new TypeError('Invalid hex string') | |
if (length > strLen / 2) { | |
length = strLen / 2 | |
} | |
for (var i = 0; i < length; ++i) { | |
var parsed = parseInt(string.substr(i * 2, 2), 16) | |
if (isNaN(parsed)) return i | |
buf[offset + i] = parsed | |
} | |
return i | |
} | |
function utf8Write (buf, string, offset, length) { | |
return blitBuffer(utf8ToBytes(string, buf.length - offset), buf, offset, length) | |
} | |
function asciiWrite (buf, string, offset, length) { | |
return blitBuffer(asciiToBytes(string), buf, offset, length) | |
} | |
function latin1Write (buf, string, offset, length) { | |
return asciiWrite(buf, string, offset, length) | |
} | |
function base64Write (buf, string, offset, length) { | |
return blitBuffer(base64ToBytes(string), buf, offset, length) | |
} | |
function ucs2Write (buf, string, offset, length) { | |
return blitBuffer(utf16leToBytes(string, buf.length - offset), buf, offset, length) | |
} | |
Buffer.prototype.write = function write (string, offset, length, encoding) { | |
// Buffer#write(string) | |
if (offset === undefined) { | |
encoding = 'utf8' | |
length = this.length | |
offset = 0 | |
// Buffer#write(string, encoding) | |
} else if (length === undefined && typeof offset === 'string') { | |
encoding = offset | |
length = this.length | |
offset = 0 | |
// Buffer#write(string, offset[, length][, encoding]) | |
} else if (isFinite(offset)) { | |
offset = offset | 0 | |
if (isFinite(length)) { | |
length = length | 0 | |
if (encoding === undefined) encoding = 'utf8' | |
} else { | |
encoding = length | |
length = undefined | |
} | |
// legacy write(string, encoding, offset, length) - remove in v0.13 | |
} else { | |
throw new Error( | |
'Buffer.write(string, encoding, offset[, length]) is no longer supported' | |
) | |
} | |
var remaining = this.length - offset | |
if (length === undefined || length > remaining) length = remaining | |
if ((string.length > 0 && (length < 0 || offset < 0)) || offset > this.length) { | |
throw new RangeError('Attempt to write outside buffer bounds') | |
} | |
if (!encoding) encoding = 'utf8' | |
var loweredCase = false | |
for (;;) { | |
switch (encoding) { | |
case 'hex': | |
return hexWrite(this, string, offset, length) | |
case 'utf8': | |
case 'utf-8': | |
return utf8Write(this, string, offset, length) | |
case 'ascii': | |
return asciiWrite(this, string, offset, length) | |
case 'latin1': | |
case 'binary': | |
return latin1Write(this, string, offset, length) | |
case 'base64': | |
// Warning: maxLength not taken into account in base64Write | |
return base64Write(this, string, offset, length) | |
case 'ucs2': | |
case 'ucs-2': | |
case 'utf16le': | |
case 'utf-16le': | |
return ucs2Write(this, string, offset, length) | |
default: | |
if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding) | |
encoding = ('' + encoding).toLowerCase() | |
loweredCase = true | |
} | |
} | |
} | |
Buffer.prototype.toJSON = function toJSON () { | |
return { | |
type: 'Buffer', | |
data: Array.prototype.slice.call(this._arr || this, 0) | |
} | |
} | |
function base64Slice (buf, start, end) { | |
if (start === 0 && end === buf.length) { | |
return base64.fromByteArray(buf) | |
} else { | |
return base64.fromByteArray(buf.slice(start, end)) | |
} | |
} | |
function utf8Slice (buf, start, end) { | |
end = Math.min(buf.length, end) | |
var res = [] | |
var i = start | |
while (i < end) { | |
var firstByte = buf[i] | |
var codePoint = null | |
var bytesPerSequence = (firstByte > 0xEF) ? 4 | |
: (firstByte > 0xDF) ? 3 | |
: (firstByte > 0xBF) ? 2 | |
: 1 | |
if (i + bytesPerSequence <= end) { | |
var secondByte, thirdByte, fourthByte, tempCodePoint | |
switch (bytesPerSequence) { | |
case 1: | |
if (firstByte < 0x80) { | |
codePoint = firstByte | |
} | |
break | |
case 2: | |
secondByte = buf[i + 1] | |
if ((secondByte & 0xC0) === 0x80) { | |
tempCodePoint = (firstByte & 0x1F) << 0x6 | (secondByte & 0x3F) | |
if (tempCodePoint > 0x7F) { | |
codePoint = tempCodePoint | |
} | |
} | |
break | |
case 3: | |
secondByte = buf[i + 1] | |
thirdByte = buf[i + 2] | |
if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80) { | |
tempCodePoint = (firstByte & 0xF) << 0xC | (secondByte & 0x3F) << 0x6 | (thirdByte & 0x3F) | |
if (tempCodePoint > 0x7FF && (tempCodePoint < 0xD800 || tempCodePoint > 0xDFFF)) { | |
codePoint = tempCodePoint | |
} | |
} | |
break | |
case 4: | |
secondByte = buf[i + 1] | |
thirdByte = buf[i + 2] | |
fourthByte = buf[i + 3] | |
if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80 && (fourthByte & 0xC0) === 0x80) { | |
tempCodePoint = (firstByte & 0xF) << 0x12 | (secondByte & 0x3F) << 0xC | (thirdByte & 0x3F) << 0x6 | (fourthByte & 0x3F) | |
if (tempCodePoint > 0xFFFF && tempCodePoint < 0x110000) { | |
codePoint = tempCodePoint | |
} | |
} | |
} | |
} | |
if (codePoint === null) { | |
// we did not generate a valid codePoint so insert a | |
// replacement char (U+FFFD) and advance only 1 byte | |
codePoint = 0xFFFD | |
bytesPerSequence = 1 | |
} else if (codePoint > 0xFFFF) { | |
// encode to utf16 (surrogate pair dance) | |
codePoint -= 0x10000 | |
res.push(codePoint >>> 10 & 0x3FF | 0xD800) | |
codePoint = 0xDC00 | codePoint & 0x3FF | |
} | |
res.push(codePoint) | |
i += bytesPerSequence | |
} | |
return decodeCodePointsArray(res) | |
} | |
// Based on http://stackoverflow.com/a/22747272/680742, the browser with | |
// the lowest limit is Chrome, with 0x10000 args. | |
// We go 1 magnitude less, for safety | |
var MAX_ARGUMENTS_LENGTH = 0x1000 | |
function decodeCodePointsArray (codePoints) { | |
var len = codePoints.length | |
if (len <= MAX_ARGUMENTS_LENGTH) { | |
return String.fromCharCode.apply(String, codePoints) // avoid extra slice() | |
} | |
// Decode in chunks to avoid "call stack size exceeded". | |
var res = '' | |
var i = 0 | |
while (i < len) { | |
res += String.fromCharCode.apply( | |
String, | |
codePoints.slice(i, i += MAX_ARGUMENTS_LENGTH) | |
) | |
} | |
return res | |
} | |
function asciiSlice (buf, start, end) { | |
var ret = '' | |
end = Math.min(buf.length, end) | |
for (var i = start; i < end; ++i) { | |
ret += String.fromCharCode(buf[i] & 0x7F) | |
} | |
return ret | |
} | |
function latin1Slice (buf, start, end) { | |
var ret = '' | |
end = Math.min(buf.length, end) | |
for (var i = start; i < end; ++i) { | |
ret += String.fromCharCode(buf[i]) | |
} | |
return ret | |
} | |
function hexSlice (buf, start, end) { | |
var len = buf.length | |
if (!start || start < 0) start = 0 | |
if (!end || end < 0 || end > len) end = len | |
var out = '' | |
for (var i = start; i < end; ++i) { | |
out += toHex(buf[i]) | |
} | |
return out | |
} | |
function utf16leSlice (buf, start, end) { | |
var bytes = buf.slice(start, end) | |
var res = '' | |
for (var i = 0; i < bytes.length; i += 2) { | |
res += String.fromCharCode(bytes[i] + bytes[i + 1] * 256) | |
} | |
return res | |
} | |
Buffer.prototype.slice = function slice (start, end) { | |
var len = this.length | |
start = ~~start | |
end = end === undefined ? len : ~~end | |
if (start < 0) { | |
start += len | |
if (start < 0) start = 0 | |
} else if (start > len) { | |
start = len | |
} | |
if (end < 0) { | |
end += len | |
if (end < 0) end = 0 | |
} else if (end > len) { | |
end = len | |
} | |
if (end < start) end = start | |
var newBuf | |
if (Buffer.TYPED_ARRAY_SUPPORT) { | |
newBuf = this.subarray(start, end) | |
newBuf.__proto__ = Buffer.prototype | |
} else { | |
var sliceLen = end - start | |
newBuf = new Buffer(sliceLen, undefined) | |
for (var i = 0; i < sliceLen; ++i) { | |
newBuf[i] = this[i + start] | |
} | |
} | |
return newBuf | |
} | |
/* | |
* Need to make sure that buffer isn't trying to write out of bounds. | |
*/ | |
function checkOffset (offset, ext, length) { | |
if ((offset % 1) !== 0 || offset < 0) throw new RangeError('offset is not uint') | |
if (offset + ext > length) throw new RangeError('Trying to access beyond buffer length') | |
} | |
Buffer.prototype.readUIntLE = function readUIntLE (offset, byteLength, noAssert) { | |
offset = offset | 0 | |
byteLength = byteLength | 0 | |
if (!noAssert) checkOffset(offset, byteLength, this.length) | |
var val = this[offset] | |
var mul = 1 | |
var i = 0 | |
while (++i < byteLength && (mul *= 0x100)) { | |
val += this[offset + i] * mul | |
} | |
return val | |
} | |
Buffer.prototype.readUIntBE = function readUIntBE (offset, byteLength, noAssert) { | |
offset = offset | 0 | |
byteLength = byteLength | 0 | |
if (!noAssert) { | |
checkOffset(offset, byteLength, this.length) | |
} | |
var val = this[offset + --byteLength] | |
var mul = 1 | |
while (byteLength > 0 && (mul *= 0x100)) { | |
val += this[offset + --byteLength] * mul | |
} | |
return val | |
} | |
Buffer.prototype.readUInt8 = function readUInt8 (offset, noAssert) { | |
if (!noAssert) checkOffset(offset, 1, this.length) | |
return this[offset] | |
} | |
Buffer.prototype.readUInt16LE = function readUInt16LE (offset, noAssert) { | |
if (!noAssert) checkOffset(offset, 2, this.length) | |
return this[offset] | (this[offset + 1] << 8) | |
} | |
Buffer.prototype.readUInt16BE = function readUInt16BE (offset, noAssert) { | |
if (!noAssert) checkOffset(offset, 2, this.length) | |
return (this[offset] << 8) | this[offset + 1] | |
} | |
Buffer.prototype.readUInt32LE = function readUInt32LE (offset, noAssert) { | |
if (!noAssert) checkOffset(offset, 4, this.length) | |
return ((this[offset]) | | |
(this[offset + 1] << 8) | | |
(this[offset + 2] << 16)) + | |
(this[offset + 3] * 0x1000000) | |
} | |
Buffer.prototype.readUInt32BE = function readUInt32BE (offset, noAssert) { | |
if (!noAssert) checkOffset(offset, 4, this.length) | |
return (this[offset] * 0x1000000) + | |
((this[offset + 1] << 16) | | |
(this[offset + 2] << 8) | | |
this[offset + 3]) | |
} | |
Buffer.prototype.readIntLE = function readIntLE (offset, byteLength, noAssert) { | |
offset = offset | 0 | |
byteLength = byteLength | 0 | |
if (!noAssert) checkOffset(offset, byteLength, this.length) | |
var val = this[offset] | |
var mul = 1 | |
var i = 0 | |
while (++i < byteLength && (mul *= 0x100)) { | |
val += this[offset + i] * mul | |
} | |
mul *= 0x80 | |
if (val >= mul) val -= Math.pow(2, 8 * byteLength) | |
return val | |
} | |
Buffer.prototype.readIntBE = function readIntBE (offset, byteLength, noAssert) { | |
offset = offset | 0 | |
byteLength = byteLength | 0 | |
if (!noAssert) checkOffset(offset, byteLength, this.length) | |
var i = byteLength | |
var mul = 1 | |
var val = this[offset + --i] | |
while (i > 0 && (mul *= 0x100)) { | |
val += this[offset + --i] * mul | |
} | |
mul *= 0x80 | |
if (val >= mul) val -= Math.pow(2, 8 * byteLength) | |
return val | |
} | |
Buffer.prototype.readInt8 = function readInt8 (offset, noAssert) { | |
if (!noAssert) checkOffset(offset, 1, this.length) | |
if (!(this[offset] & 0x80)) return (this[offset]) | |
return ((0xff - this[offset] + 1) * -1) | |
} | |
Buffer.prototype.readInt16LE = function readInt16LE (offset, noAssert) { | |
if (!noAssert) checkOffset(offset, 2, this.length) | |
var val = this[offset] | (this[offset + 1] << 8) | |
return (val & 0x8000) ? val | 0xFFFF0000 : val | |
} | |
Buffer.prototype.readInt16BE = function readInt16BE (offset, noAssert) { | |
if (!noAssert) checkOffset(offset, 2, this.length) | |
var val = this[offset + 1] | (this[offset] << 8) | |
return (val & 0x8000) ? val | 0xFFFF0000 : val | |
} | |
Buffer.prototype.readInt32LE = function readInt32LE (offset, noAssert) { | |
if (!noAssert) checkOffset(offset, 4, this.length) | |
return (this[offset]) | | |
(this[offset + 1] << 8) | | |
(this[offset + 2] << 16) | | |
(this[offset + 3] << 24) | |
} | |
Buffer.prototype.readInt32BE = function readInt32BE (offset, noAssert) { | |
if (!noAssert) checkOffset(offset, 4, this.length) | |
return (this[offset] << 24) | | |
(this[offset + 1] << 16) | | |
(this[offset + 2] << 8) | | |
(this[offset + 3]) | |
} | |
Buffer.prototype.readFloatLE = function readFloatLE (offset, noAssert) { | |
if (!noAssert) checkOffset(offset, 4, this.length) | |
return ieee754.read(this, offset, true, 23, 4) | |
} | |
Buffer.prototype.readFloatBE = function readFloatBE (offset, noAssert) { | |
if (!noAssert) checkOffset(offset, 4, this.length) | |
return ieee754.read(this, offset, false, 23, 4) | |
} | |
Buffer.prototype.readDoubleLE = function readDoubleLE (offset, noAssert) { | |
if (!noAssert) checkOffset(offset, 8, this.length) | |
return ieee754.read(this, offset, true, 52, 8) | |
} | |
Buffer.prototype.readDoubleBE = function readDoubleBE (offset, noAssert) { | |
if (!noAssert) checkOffset(offset, 8, this.length) | |
return ieee754.read(this, offset, false, 52, 8) | |
} | |
function checkInt (buf, value, offset, ext, max, min) { | |
if (!Buffer.isBuffer(buf)) throw new TypeError('"buffer" argument must be a Buffer instance') | |
if (value > max || value < min) throw new RangeError('"value" argument is out of bounds') | |
if (offset + ext > buf.length) throw new RangeError('Index out of range') | |
} | |
Buffer.prototype.writeUIntLE = function writeUIntLE (value, offset, byteLength, noAssert) { | |
value = +value | |
offset = offset | 0 | |
byteLength = byteLength | 0 | |
if (!noAssert) { | |
var maxBytes = Math.pow(2, 8 * byteLength) - 1 | |
checkInt(this, value, offset, byteLength, maxBytes, 0) | |
} | |
var mul = 1 | |
var i = 0 | |
this[offset] = value & 0xFF | |
while (++i < byteLength && (mul *= 0x100)) { | |
this[offset + i] = (value / mul) & 0xFF | |
} | |
return offset + byteLength | |
} | |
Buffer.prototype.writeUIntBE = function writeUIntBE (value, offset, byteLength, noAssert) { | |
value = +value | |
offset = offset | 0 | |
byteLength = byteLength | 0 | |
if (!noAssert) { | |
var maxBytes = Math.pow(2, 8 * byteLength) - 1 | |
checkInt(this, value, offset, byteLength, maxBytes, 0) | |
} | |
var i = byteLength - 1 | |
var mul = 1 | |
this[offset + i] = value & 0xFF | |
while (--i >= 0 && (mul *= 0x100)) { | |
this[offset + i] = (value / mul) & 0xFF | |
} | |
return offset + byteLength | |
} | |
Buffer.prototype.writeUInt8 = function writeUInt8 (value, offset, noAssert) { | |
value = +value | |
offset = offset | 0 | |
if (!noAssert) checkInt(this, value, offset, 1, 0xff, 0) | |
if (!Buffer.TYPED_ARRAY_SUPPORT) value = Math.floor(value) | |
this[offset] = (value & 0xff) | |
return offset + 1 | |
} | |
function objectWriteUInt16 (buf, value, offset, littleEndian) { | |
if (value < 0) value = 0xffff + value + 1 | |
for (var i = 0, j = Math.min(buf.length - offset, 2); i < j; ++i) { | |
buf[offset + i] = (value & (0xff << (8 * (littleEndian ? i : 1 - i)))) >>> | |
(littleEndian ? i : 1 - i) * 8 | |
} | |
} | |
Buffer.prototype.writeUInt16LE = function writeUInt16LE (value, offset, noAssert) { | |
value = +value | |
offset = offset | 0 | |
if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0) | |
if (Buffer.TYPED_ARRAY_SUPPORT) { | |
this[offset] = (value & 0xff) | |
this[offset + 1] = (value >>> 8) | |
} else { | |
objectWriteUInt16(this, value, offset, true) | |
} | |
return offset + 2 | |
} | |
Buffer.prototype.writeUInt16BE = function writeUInt16BE (value, offset, noAssert) { | |
value = +value | |
offset = offset | 0 | |
if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0) | |
if (Buffer.TYPED_ARRAY_SUPPORT) { | |
this[offset] = (value >>> 8) | |
this[offset + 1] = (value & 0xff) | |
} else { | |
objectWriteUInt16(this, value, offset, false) | |
} | |
return offset + 2 | |
} | |
function objectWriteUInt32 (buf, value, offset, littleEndian) { | |
if (value < 0) value = 0xffffffff + value + 1 | |
for (var i = 0, j = Math.min(buf.length - offset, 4); i < j; ++i) { | |
buf[offset + i] = (value >>> (littleEndian ? i : 3 - i) * 8) & 0xff | |
} | |
} | |
Buffer.prototype.writeUInt32LE = function writeUInt32LE (value, offset, noAssert) { | |
value = +value | |
offset = offset | 0 | |
if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0) | |
if (Buffer.TYPED_ARRAY_SUPPORT) { | |
this[offset + 3] = (value >>> 24) | |
this[offset + 2] = (value >>> 16) | |
this[offset + 1] = (value >>> 8) | |
this[offset] = (value & 0xff) | |
} else { | |
objectWriteUInt32(this, value, offset, true) | |
} | |
return offset + 4 | |
} | |
Buffer.prototype.writeUInt32BE = function writeUInt32BE (value, offset, noAssert) { | |
value = +value | |
offset = offset | 0 | |
if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0) | |
if (Buffer.TYPED_ARRAY_SUPPORT) { | |
this[offset] = (value >>> 24) | |
this[offset + 1] = (value >>> 16) | |
this[offset + 2] = (value >>> 8) | |
this[offset + 3] = (value & 0xff) | |
} else { | |
objectWriteUInt32(this, value, offset, false) | |
} | |
return offset + 4 | |
} | |
Buffer.prototype.writeIntLE = function writeIntLE (value, offset, byteLength, noAssert) { | |
value = +value | |
offset = offset | 0 | |
if (!noAssert) { | |
var limit = Math.pow(2, 8 * byteLength - 1) | |
checkInt(this, value, offset, byteLength, limit - 1, -limit) | |
} | |
var i = 0 | |
var mul = 1 | |
var sub = 0 | |
this[offset] = value & 0xFF | |
while (++i < byteLength && (mul *= 0x100)) { | |
if (value < 0 && sub === 0 && this[offset + i - 1] !== 0) { | |
sub = 1 | |
} | |
this[offset + i] = ((value / mul) >> 0) - sub & 0xFF | |
} | |
return offset + byteLength | |
} | |
Buffer.prototype.writeIntBE = function writeIntBE (value, offset, byteLength, noAssert) { | |
value = +value | |
offset = offset | 0 | |
if (!noAssert) { | |
var limit = Math.pow(2, 8 * byteLength - 1) | |
checkInt(this, value, offset, byteLength, limit - 1, -limit) | |
} | |
var i = byteLength - 1 | |
var mul = 1 | |
var sub = 0 | |
this[offset + i] = value & 0xFF | |
while (--i >= 0 && (mul *= 0x100)) { | |
if (value < 0 && sub === 0 && this[offset + i + 1] !== 0) { | |
sub = 1 | |
} | |
this[offset + i] = ((value / mul) >> 0) - sub & 0xFF | |
} | |
return offset + byteLength | |
} | |
Buffer.prototype.writeInt8 = function writeInt8 (value, offset, noAssert) { | |
value = +value | |
offset = offset | 0 | |
if (!noAssert) checkInt(this, value, offset, 1, 0x7f, -0x80) | |
if (!Buffer.TYPED_ARRAY_SUPPORT) value = Math.floor(value) | |
if (value < 0) value = 0xff + value + 1 | |
this[offset] = (value & 0xff) | |
return offset + 1 | |
} | |
Buffer.prototype.writeInt16LE = function writeInt16LE (value, offset, noAssert) { | |
value = +value | |
offset = offset | 0 | |
if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000) | |
if (Buffer.TYPED_ARRAY_SUPPORT) { | |
this[offset] = (value & 0xff) | |
this[offset + 1] = (value >>> 8) | |
} else { | |
objectWriteUInt16(this, value, offset, true) | |
} | |
return offset + 2 | |
} | |
Buffer.prototype.writeInt16BE = function writeInt16BE (value, offset, noAssert) { | |
value = +value | |
offset = offset | 0 | |
if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000) | |
if (Buffer.TYPED_ARRAY_SUPPORT) { | |
this[offset] = (value >>> 8) | |
this[offset + 1] = (value & 0xff) | |
} else { | |
objectWriteUInt16(this, value, offset, false) | |
} | |
return offset + 2 | |
} | |
Buffer.prototype.writeInt32LE = function writeInt32LE (value, offset, noAssert) { | |
value = +value | |
offset = offset | 0 | |
if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000) | |
if (Buffer.TYPED_ARRAY_SUPPORT) { | |
this[offset] = (value & 0xff) | |
this[offset + 1] = (value >>> 8) | |
this[offset + 2] = (value >>> 16) | |
this[offset + 3] = (value >>> 24) | |
} else { | |
objectWriteUInt32(this, value, offset, true) | |
} | |
return offset + 4 | |
} | |
Buffer.prototype.writeInt32BE = function writeInt32BE (value, offset, noAssert) { | |
value = +value | |
offset = offset | 0 | |
if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000) | |
if (value < 0) value = 0xffffffff + value + 1 | |
if (Buffer.TYPED_ARRAY_SUPPORT) { | |
this[offset] = (value >>> 24) | |
this[offset + 1] = (value >>> 16) | |
this[offset + 2] = (value >>> 8) | |
this[offset + 3] = (value & 0xff) | |
} else { | |
objectWriteUInt32(this, value, offset, false) | |
} | |
return offset + 4 | |
} | |
function checkIEEE754 (buf, value, offset, ext, max, min) { | |
if (offset + ext > buf.length) throw new RangeError('Index out of range') | |
if (offset < 0) throw new RangeError('Index out of range') | |
} | |
function writeFloat (buf, value, offset, littleEndian, noAssert) { | |
if (!noAssert) { | |
checkIEEE754(buf, value, offset, 4, 3.4028234663852886e+38, -3.4028234663852886e+38) | |
} | |
ieee754.write(buf, value, offset, littleEndian, 23, 4) | |
return offset + 4 | |
} | |
Buffer.prototype.writeFloatLE = function writeFloatLE (value, offset, noAssert) { | |
return writeFloat(this, value, offset, true, noAssert) | |
} | |
Buffer.prototype.writeFloatBE = function writeFloatBE (value, offset, noAssert) { | |
return writeFloat(this, value, offset, false, noAssert) | |
} | |
function writeDouble (buf, value, offset, littleEndian, noAssert) { | |
if (!noAssert) { | |
checkIEEE754(buf, value, offset, 8, 1.7976931348623157E+308, -1.7976931348623157E+308) | |
} | |
ieee754.write(buf, value, offset, littleEndian, 52, 8) | |
return offset + 8 | |
} | |
Buffer.prototype.writeDoubleLE = function writeDoubleLE (value, offset, noAssert) { | |
return writeDouble(this, value, offset, true, noAssert) | |
} | |
Buffer.prototype.writeDoubleBE = function writeDoubleBE (value, offset, noAssert) { | |
return writeDouble(this, value, offset, false, noAssert) | |
} | |
// copy(targetBuffer, targetStart=0, sourceStart=0, sourceEnd=buffer.length) | |
Buffer.prototype.copy = function copy (target, targetStart, start, end) { | |
if (!start) start = 0 | |
if (!end && end !== 0) end = this.length | |
if (targetStart >= target.length) targetStart = target.length | |
if (!targetStart) targetStart = 0 | |
if (end > 0 && end < start) end = start | |
// Copy 0 bytes; we're done | |
if (end === start) return 0 | |
if (target.length === 0 || this.length === 0) return 0 | |
// Fatal error conditions | |
if (targetStart < 0) { | |
throw new RangeError('targetStart out of bounds') | |
} | |
if (start < 0 || start >= this.length) throw new RangeError('sourceStart out of bounds') | |
if (end < 0) throw new RangeError('sourceEnd out of bounds') | |
// Are we oob? | |
if (end > this.length) end = this.length | |
if (target.length - targetStart < end - start) { | |
end = target.length - targetStart + start | |
} | |
var len = end - start | |
var i | |
if (this === target && start < targetStart && targetStart < end) { | |
// descending copy from end | |
for (i = len - 1; i >= 0; --i) { | |
target[i + targetStart] = this[i + start] | |
} | |
} else if (len < 1000 || !Buffer.TYPED_ARRAY_SUPPORT) { | |
// ascending copy from start | |
for (i = 0; i < len; ++i) { | |
target[i + targetStart] = this[i + start] | |
} | |
} else { | |
Uint8Array.prototype.set.call( | |
target, | |
this.subarray(start, start + len), | |
targetStart | |
) | |
} | |
return len | |
} | |
// Usage: | |
// buffer.fill(number[, offset[, end]]) | |
// buffer.fill(buffer[, offset[, end]]) | |
// buffer.fill(string[, offset[, end]][, encoding]) | |
Buffer.prototype.fill = function fill (val, start, end, encoding) { | |
// Handle string cases: | |
if (typeof val === 'string') { | |
if (typeof start === 'string') { | |
encoding = start | |
start = 0 | |
end = this.length | |
} else if (typeof end === 'string') { | |
encoding = end | |
end = this.length | |
} | |
if (val.length === 1) { | |
var code = val.charCodeAt(0) | |
if (code < 256) { | |
val = code | |
} | |
} | |
if (encoding !== undefined && typeof encoding !== 'string') { | |
throw new TypeError('encoding must be a string') | |
} | |
if (typeof encoding === 'string' && !Buffer.isEncoding(encoding)) { | |
throw new TypeError('Unknown encoding: ' + encoding) | |
} | |
} else if (typeof val === 'number') { | |
val = val & 255 | |
} | |
// Invalid ranges are not set to a default, so can range check early. | |
if (start < 0 || this.length < start || this.length < end) { | |
throw new RangeError('Out of range index') | |
} | |
if (end <= start) { | |
return this | |
} | |
start = start >>> 0 | |
end = end === undefined ? this.length : end >>> 0 | |
if (!val) val = 0 | |
var i | |
if (typeof val === 'number') { | |
for (i = start; i < end; ++i) { | |
this[i] = val | |
} | |
} else { | |
var bytes = Buffer.isBuffer(val) | |
? val | |
: utf8ToBytes(new Buffer(val, encoding).toString()) | |
var len = bytes.length | |
for (i = 0; i < end - start; ++i) { | |
this[i + start] = bytes[i % len] | |
} | |
} | |
return this | |
} | |
// HELPER FUNCTIONS | |
// ================ | |
var INVALID_BASE64_RE = /[^+\/0-9A-Za-z-_]/g | |
function base64clean (str) { | |
// Node strips out invalid characters like \n and \t from the string, base64-js does not | |
str = stringtrim(str).replace(INVALID_BASE64_RE, '') | |
// Node converts strings with length < 2 to '' | |
if (str.length < 2) return '' | |
// Node allows for non-padded base64 strings (missing trailing ===), base64-js does not | |
while (str.length % 4 !== 0) { | |
str = str + '=' | |
} | |
return str | |
} | |
function stringtrim (str) { | |
if (str.trim) return str.trim() | |
return str.replace(/^\s+|\s+$/g, '') | |
} | |
function toHex (n) { | |
if (n < 16) return '0' + n.toString(16) | |
return n.toString(16) | |
} | |
function utf8ToBytes (string, units) { | |
units = units || Infinity | |
var codePoint | |
var length = string.length | |
var leadSurrogate = null | |
var bytes = [] | |
for (var i = 0; i < length; ++i) { | |
codePoint = string.charCodeAt(i) | |
// is surrogate component | |
if (codePoint > 0xD7FF && codePoint < 0xE000) { | |
// last char was a lead | |
if (!leadSurrogate) { | |
// no lead yet | |
if (codePoint > 0xDBFF) { | |
// unexpected trail | |
if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD) | |
continue | |
} else if (i + 1 === length) { | |
// unpaired lead | |
if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD) | |
continue | |
} | |
// valid lead | |
leadSurrogate = codePoint | |
continue | |
} | |
// 2 leads in a row | |
if (codePoint < 0xDC00) { | |
if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD) | |
leadSurrogate = codePoint | |
continue | |
} | |
// valid surrogate pair | |
codePoint = (leadSurrogate - 0xD800 << 10 | codePoint - 0xDC00) + 0x10000 | |
} else if (leadSurrogate) { | |
// valid bmp char, but last char was a lead | |
if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD) | |
} | |
leadSurrogate = null | |
// encode utf8 | |
if (codePoint < 0x80) { | |
if ((units -= 1) < 0) break | |
bytes.push(codePoint) | |
} else if (codePoint < 0x800) { | |
if ((units -= 2) < 0) break | |
bytes.push( | |
codePoint >> 0x6 | 0xC0, | |
codePoint & 0x3F | 0x80 | |
) | |
} else if (codePoint < 0x10000) { | |
if ((units -= 3) < 0) break | |
bytes.push( | |
codePoint >> 0xC | 0xE0, | |
codePoint >> 0x6 & 0x3F | 0x80, | |
codePoint & 0x3F | 0x80 | |
) | |
} else if (codePoint < 0x110000) { | |
if ((units -= 4) < 0) break | |
bytes.push( | |
codePoint >> 0x12 | 0xF0, | |
codePoint >> 0xC & 0x3F | 0x80, | |
codePoint >> 0x6 & 0x3F | 0x80, | |
codePoint & 0x3F | 0x80 | |
) | |
} else { | |
throw new Error('Invalid code point') | |
} | |
} | |
return bytes | |
} | |
function asciiToBytes (str) { | |
var byteArray = [] | |
for (var i = 0; i < str.length; ++i) { | |
// Node's code seems to be doing this and not & 0x7F.. | |
byteArray.push(str.charCodeAt(i) & 0xFF) | |
} | |
return byteArray | |
} | |
function utf16leToBytes (str, units) { | |
var c, hi, lo | |
var byteArray = [] | |
for (var i = 0; i < str.length; ++i) { | |
if ((units -= 2) < 0) break | |
c = str.charCodeAt(i) | |
hi = c >> 8 | |
lo = c % 256 | |
byteArray.push(lo) | |
byteArray.push(hi) | |
} | |
return byteArray | |
} | |
function base64ToBytes (str) { | |
return base64.toByteArray(base64clean(str)) | |
} | |
function blitBuffer (src, dst, offset, length) { | |
for (var i = 0; i < length; ++i) { | |
if ((i + offset >= dst.length) || (i >= src.length)) break | |
dst[i + offset] = src[i] | |
} | |
return i | |
} | |
function isnan (val) { | |
return val !== val // eslint-disable-line no-self-compare | |
} | |
}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {}) | |
},{"base64-js":1,"ieee754":3,"isarray":4}],3:[function(require,module,exports){ | |
exports.read = function (buffer, offset, isLE, mLen, nBytes) { | |
var e, m | |
var eLen = nBytes * 8 - mLen - 1 | |
var eMax = (1 << eLen) - 1 | |
var eBias = eMax >> 1 | |
var nBits = -7 | |
var i = isLE ? (nBytes - 1) : 0 | |
var d = isLE ? -1 : 1 | |
var s = buffer[offset + i] | |
i += d | |
e = s & ((1 << (-nBits)) - 1) | |
s >>= (-nBits) | |
nBits += eLen | |
for (; nBits > 0; e = e * 256 + buffer[offset + i], i += d, nBits -= 8) {} | |
m = e & ((1 << (-nBits)) - 1) | |
e >>= (-nBits) | |
nBits += mLen | |
for (; nBits > 0; m = m * 256 + buffer[offset + i], i += d, nBits -= 8) {} | |
if (e === 0) { | |
e = 1 - eBias | |
} else if (e === eMax) { | |
return m ? NaN : ((s ? -1 : 1) * Infinity) | |
} else { | |
m = m + Math.pow(2, mLen) | |
e = e - eBias | |
} | |
return (s ? -1 : 1) * m * Math.pow(2, e - mLen) | |
} | |
exports.write = function (buffer, value, offset, isLE, mLen, nBytes) { | |
var e, m, c | |
var eLen = nBytes * 8 - mLen - 1 | |
var eMax = (1 << eLen) - 1 | |
var eBias = eMax >> 1 | |
var rt = (mLen === 23 ? Math.pow(2, -24) - Math.pow(2, -77) : 0) | |
var i = isLE ? 0 : (nBytes - 1) | |
var d = isLE ? 1 : -1 | |
var s = value < 0 || (value === 0 && 1 / value < 0) ? 1 : 0 | |
value = Math.abs(value) | |
if (isNaN(value) || value === Infinity) { | |
m = isNaN(value) ? 1 : 0 | |
e = eMax | |
} else { | |
e = Math.floor(Math.log(value) / Math.LN2) | |
if (value * (c = Math.pow(2, -e)) < 1) { | |
e-- | |
c *= 2 | |
} | |
if (e + eBias >= 1) { | |
value += rt / c | |
} else { | |
value += rt * Math.pow(2, 1 - eBias) | |
} | |
if (value * c >= 2) { | |
e++ | |
c /= 2 | |
} | |
if (e + eBias >= eMax) { | |
m = 0 | |
e = eMax | |
} else if (e + eBias >= 1) { | |
m = (value * c - 1) * Math.pow(2, mLen) | |
e = e + eBias | |
} else { | |
m = value * Math.pow(2, eBias - 1) * Math.pow(2, mLen) | |
e = 0 | |
} | |
} | |
for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) {} | |
e = (e << mLen) | m | |
eLen += mLen | |
for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) {} | |
buffer[offset + i - d] |= s * 128 | |
} | |
},{}],4:[function(require,module,exports){ | |
var toString = {}.toString; | |
module.exports = Array.isArray || function (arr) { | |
return toString.call(arr) == '[object Array]'; | |
}; | |
},{}],5:[function(require,module,exports){ | |
// shim for using process in browser | |
var process = module.exports = {}; | |
// cached from whatever global is present so that test runners that stub it | |
// don't break things. But we need to wrap it in a try catch in case it is | |
// wrapped in strict mode code which doesn't define any globals. It's inside a | |
// function because try/catches deoptimize in certain engines. | |
var cachedSetTimeout; | |
var cachedClearTimeout; | |
function defaultSetTimout() { | |
throw new Error('setTimeout has not been defined'); | |
} | |
function defaultClearTimeout () { | |
throw new Error('clearTimeout has not been defined'); | |
} | |
(function () { | |
try { | |
if (typeof setTimeout === 'function') { | |
cachedSetTimeout = setTimeout; | |
} else { | |
cachedSetTimeout = defaultSetTimout; | |
} | |
} catch (e) { | |
cachedSetTimeout = defaultSetTimout; | |
} | |
try { | |
if (typeof clearTimeout === 'function') { | |
cachedClearTimeout = clearTimeout; | |
} else { | |
cachedClearTimeout = defaultClearTimeout; | |
} | |
} catch (e) { | |
cachedClearTimeout = defaultClearTimeout; | |
} | |
} ()) | |
function runTimeout(fun) { | |
if (cachedSetTimeout === setTimeout) { | |
//normal enviroments in sane situations | |
return setTimeout(fun, 0); | |
} | |
// if setTimeout wasn't available but was latter defined | |
if ((cachedSetTimeout === defaultSetTimout || !cachedSetTimeout) && setTimeout) { | |
cachedSetTimeout = setTimeout; | |
return setTimeout(fun, 0); | |
} | |
try { | |
// when when somebody has screwed with setTimeout but no I.E. maddness | |
return cachedSetTimeout(fun, 0); | |
} catch(e){ | |
try { | |
// When we are in I.E. but the script has been evaled so I.E. doesn't trust the global object when called normally | |
return cachedSetTimeout.call(null, fun, 0); | |
} catch(e){ | |
// same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error | |
return cachedSetTimeout.call(this, fun, 0); | |
} | |
} | |
} | |
function runClearTimeout(marker) { | |
if (cachedClearTimeout === clearTimeout) { | |
//normal enviroments in sane situations | |
return clearTimeout(marker); | |
} | |
// if clearTimeout wasn't available but was latter defined | |
if ((cachedClearTimeout === defaultClearTimeout || !cachedClearTimeout) && clearTimeout) { | |
cachedClearTimeout = clearTimeout; | |
return clearTimeout(marker); | |
} | |
try { | |
// when when somebody has screwed with setTimeout but no I.E. maddness | |
return cachedClearTimeout(marker); | |
} catch (e){ | |
try { | |
// When we are in I.E. but the script has been evaled so I.E. doesn't trust the global object when called normally | |
return cachedClearTimeout.call(null, marker); | |
} catch (e){ | |
// same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error. | |
// Some versions of I.E. have different rules for clearTimeout vs setTimeout | |
return cachedClearTimeout.call(this, marker); | |
} | |
} | |
} | |
var queue = []; | |
var draining = false; | |
var currentQueue; | |
var queueIndex = -1; | |
function cleanUpNextTick() { | |
if (!draining || !currentQueue) { | |
return; | |
} | |
draining = false; | |
if (currentQueue.length) { | |
queue = currentQueue.concat(queue); | |
} else { | |
queueIndex = -1; | |
} | |
if (queue.length) { | |
drainQueue(); | |
} | |
} | |
function drainQueue() { | |
if (draining) { | |
return; | |
} | |
var timeout = runTimeout(cleanUpNextTick); | |
draining = true; | |
var len = queue.length; | |
while(len) { | |
currentQueue = queue; | |
queue = []; | |
while (++queueIndex < len) { | |
if (currentQueue) { | |
currentQueue[queueIndex].run(); | |
} | |
} | |
queueIndex = -1; | |
len = queue.length; | |
} | |
currentQueue = null; | |
draining = false; | |
runClearTimeout(timeout); | |
} | |
process.nextTick = function (fun) { | |
var args = new Array(arguments.length - 1); | |
if (arguments.length > 1) { | |
for (var i = 1; i < arguments.length; i++) { | |
args[i - 1] = arguments[i]; | |
} | |
} | |
queue.push(new Item(fun, args)); | |
if (queue.length === 1 && !draining) { | |
runTimeout(drainQueue); | |
} | |
}; | |
// v8 likes predictible objects | |
function Item(fun, array) { | |
this.fun = fun; | |
this.array = array; | |
} | |
Item.prototype.run = function () { | |
this.fun.apply(null, this.array); | |
}; | |
process.title = 'browser'; | |
process.browser = true; | |
process.env = {}; | |
process.argv = []; | |
process.version = ''; // empty string to avoid regexp issues | |
process.versions = {}; | |
function noop() {} | |
process.on = noop; | |
process.addListener = noop; | |
process.once = noop; | |
process.off = noop; | |
process.removeListener = noop; | |
process.removeAllListeners = noop; | |
process.emit = noop; | |
process.binding = function (name) { | |
throw new Error('process.binding is not supported'); | |
}; | |
process.cwd = function () { return '/' }; | |
process.chdir = function (dir) { | |
throw new Error('process.chdir is not supported'); | |
}; | |
process.umask = function() { return 0; }; | |
},{}],6:[function(require,module,exports){ | |
(function (process,Buffer){ | |
if (process.browser) { | |
module.exports = function (string) { | |
return btoa(string); | |
}; | |
} else { | |
module.exports = function (string) { | |
return Buffer.from(string, 'binary').toString('base64'); | |
}; | |
} | |
}).call(this,require('_process'),require("buffer").Buffer) | |
},{"_process":5,"buffer":2}]},{},[6]); |
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/******/ // The module cache | |
/******/ var installedModules = {}; | |
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/******/ return module.exports; | |
/******/ } | |
/******/ // expose the modules object (__webpack_modules__) | |
/******/ __webpack_require__.m = modules; | |
/******/ // expose the module cache | |
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/* 0 */ | |
/***/ function(module, exports, __webpack_require__) { | |
"use strict"; | |
/* WEBPACK VAR INJECTION */(function(global) {/*! | |
* The buffer module from node.js, for the browser. | |
* | |
* @author Feross Aboukhadijeh <feross@feross.org> <http://feross.org> | |
* @license MIT | |
*/ | |
/* eslint-disable no-proto */ | |
var base64 = __webpack_require__(3) | |
var ieee754 = __webpack_require__(4) | |
var isArray = __webpack_require__(5) | |
exports.Buffer = Buffer | |
exports.SlowBuffer = SlowBuffer | |
exports.INSPECT_MAX_BYTES = 50 | |
/** | |
* If `Buffer.TYPED_ARRAY_SUPPORT`: | |
* === true Use Uint8Array implementation (fastest) | |
* === false Use Object implementation (most compatible, even IE6) | |
* | |
* Browsers that support typed arrays are IE 10+, Firefox 4+, Chrome 7+, Safari 5.1+, | |
* Opera 11.6+, iOS 4.2+. | |
* | |
* Due to various browser bugs, sometimes the Object implementation will be used even | |
* when the browser supports typed arrays. | |
* | |
* Note: | |
* | |
* - Firefox 4-29 lacks support for adding new properties to `Uint8Array` instances, | |
* See: https://bugzilla.mozilla.org/show_bug.cgi?id=695438. | |
* | |
* - Chrome 9-10 is missing the `TypedArray.prototype.subarray` function. | |
* | |
* - IE10 has a broken `TypedArray.prototype.subarray` function which returns arrays of | |
* incorrect length in some situations. | |
* We detect these buggy browsers and set `Buffer.TYPED_ARRAY_SUPPORT` to `false` so they | |
* get the Object implementation, which is slower but behaves correctly. | |
*/ | |
Buffer.TYPED_ARRAY_SUPPORT = global.TYPED_ARRAY_SUPPORT !== undefined | |
? global.TYPED_ARRAY_SUPPORT | |
: typedArraySupport() | |
/* | |
* Export kMaxLength after typed array support is determined. | |
*/ | |
exports.kMaxLength = kMaxLength() | |
function typedArraySupport () { | |
try { | |
var arr = new Uint8Array(1) | |
arr.__proto__ = {__proto__: Uint8Array.prototype, foo: function () { return 42 }} | |
return arr.foo() === 42 && // typed array instances can be augmented | |
typeof arr.subarray === 'function' && // chrome 9-10 lack `subarray` | |
arr.subarray(1, 1).byteLength === 0 // ie10 has broken `subarray` | |
} catch (e) { | |
return false | |
} | |
} | |
function kMaxLength () { | |
return Buffer.TYPED_ARRAY_SUPPORT | |
? 0x7fffffff | |
: 0x3fffffff | |
} | |
function createBuffer (that, length) { | |
if (kMaxLength() < length) { | |
throw new RangeError('Invalid typed array length') | |
} | |
if (Buffer.TYPED_ARRAY_SUPPORT) { | |
// Return an augmented `Uint8Array` instance, for best performance | |
that = new Uint8Array(length) | |
that.__proto__ = Buffer.prototype | |
} else { | |
// Fallback: Return an object instance of the Buffer class | |
if (that === null) { | |
that = new Buffer(length) | |
} | |
that.length = length | |
} | |
return that | |
} | |
/** | |
* The Buffer constructor returns instances of `Uint8Array` that have their | |
* prototype changed to `Buffer.prototype`. Furthermore, `Buffer` is a subclass of | |
* `Uint8Array`, so the returned instances will have all the node `Buffer` methods | |
* and the `Uint8Array` methods. Square bracket notation works as expected -- it | |
* returns a single octet. | |
* | |
* The `Uint8Array` prototype remains unmodified. | |
*/ | |
function Buffer (arg, encodingOrOffset, length) { | |
if (!Buffer.TYPED_ARRAY_SUPPORT && !(this instanceof Buffer)) { | |
return new Buffer(arg, encodingOrOffset, length) | |
} | |
// Common case. | |
if (typeof arg === 'number') { | |
if (typeof encodingOrOffset === 'string') { | |
throw new Error( | |
'If encoding is specified then the first argument must be a string' | |
) | |
} | |
return allocUnsafe(this, arg) | |
} | |
return from(this, arg, encodingOrOffset, length) | |
} | |
Buffer.poolSize = 8192 // not used by this implementation | |
// TODO: Legacy, not needed anymore. Remove in next major version. | |
Buffer._augment = function (arr) { | |
arr.__proto__ = Buffer.prototype | |
return arr | |
} | |
function from (that, value, encodingOrOffset, length) { | |
if (typeof value === 'number') { | |
throw new TypeError('"value" argument must not be a number') | |
} | |
if (typeof ArrayBuffer !== 'undefined' && value instanceof ArrayBuffer) { | |
return fromArrayBuffer(that, value, encodingOrOffset, length) | |
} | |
if (typeof value === 'string') { | |
return fromString(that, value, encodingOrOffset) | |
} | |
return fromObject(that, value) | |
} | |
/** | |
* Functionally equivalent to Buffer(arg, encoding) but throws a TypeError | |
* if value is a number. | |
* Buffer.from(str[, encoding]) | |
* Buffer.from(array) | |
* Buffer.from(buffer) | |
* Buffer.from(arrayBuffer[, byteOffset[, length]]) | |
**/ | |
Buffer.from = function (value, encodingOrOffset, length) { | |
return from(null, value, encodingOrOffset, length) | |
} | |
if (Buffer.TYPED_ARRAY_SUPPORT) { | |
Buffer.prototype.__proto__ = Uint8Array.prototype | |
Buffer.__proto__ = Uint8Array | |
if (typeof Symbol !== 'undefined' && Symbol.species && | |
Buffer[Symbol.species] === Buffer) { | |
// Fix subarray() in ES2016. See: https://github.com/feross/buffer/pull/97 | |
Object.defineProperty(Buffer, Symbol.species, { | |
value: null, | |
configurable: true | |
}) | |
} | |
} | |
function assertSize (size) { | |
if (typeof size !== 'number') { | |
throw new TypeError('"size" argument must be a number') | |
} else if (size < 0) { | |
throw new RangeError('"size" argument must not be negative') | |
} | |
} | |
function alloc (that, size, fill, encoding) { | |
assertSize(size) | |
if (size <= 0) { | |
return createBuffer(that, size) | |
} | |
if (fill !== undefined) { | |
// Only pay attention to encoding if it's a string. This | |
// prevents accidentally sending in a number that would | |
// be interpretted as a start offset. | |
return typeof encoding === 'string' | |
? createBuffer(that, size).fill(fill, encoding) | |
: createBuffer(that, size).fill(fill) | |
} | |
return createBuffer(that, size) | |
} | |
/** | |
* Creates a new filled Buffer instance. | |
* alloc(size[, fill[, encoding]]) | |
**/ | |
Buffer.alloc = function (size, fill, encoding) { | |
return alloc(null, size, fill, encoding) | |
} | |
function allocUnsafe (that, size) { | |
assertSize(size) | |
that = createBuffer(that, size < 0 ? 0 : checked(size) | 0) | |
if (!Buffer.TYPED_ARRAY_SUPPORT) { | |
for (var i = 0; i < size; ++i) { | |
that[i] = 0 | |
} | |
} | |
return that | |
} | |
/** | |
* Equivalent to Buffer(num), by default creates a non-zero-filled Buffer instance. | |
* */ | |
Buffer.allocUnsafe = function (size) { | |
return allocUnsafe(null, size) | |
} | |
/** | |
* Equivalent to SlowBuffer(num), by default creates a non-zero-filled Buffer instance. | |
*/ | |
Buffer.allocUnsafeSlow = function (size) { | |
return allocUnsafe(null, size) | |
} | |
function fromString (that, string, encoding) { | |
if (typeof encoding !== 'string' || encoding === '') { | |
encoding = 'utf8' | |
} | |
if (!Buffer.isEncoding(encoding)) { | |
throw new TypeError('"encoding" must be a valid string encoding') | |
} | |
var length = byteLength(string, encoding) | 0 | |
that = createBuffer(that, length) | |
var actual = that.write(string, encoding) | |
if (actual !== length) { | |
// Writing a hex string, for example, that contains invalid characters will | |
// cause everything after the first invalid character to be ignored. (e.g. | |
// 'abxxcd' will be treated as 'ab') | |
that = that.slice(0, actual) | |
} | |
return that | |
} | |
function fromArrayLike (that, array) { | |
var length = array.length < 0 ? 0 : checked(array.length) | 0 | |
that = createBuffer(that, length) | |
for (var i = 0; i < length; i += 1) { | |
that[i] = array[i] & 255 | |
} | |
return that | |
} | |
function fromArrayBuffer (that, array, byteOffset, length) { | |
array.byteLength // this throws if `array` is not a valid ArrayBuffer | |
if (byteOffset < 0 || array.byteLength < byteOffset) { | |
throw new RangeError('\'offset\' is out of bounds') | |
} | |
if (array.byteLength < byteOffset + (length || 0)) { | |
throw new RangeError('\'length\' is out of bounds') | |
} | |
if (byteOffset === undefined && length === undefined) { | |
array = new Uint8Array(array) | |
} else if (length === undefined) { | |
array = new Uint8Array(array, byteOffset) | |
} else { | |
array = new Uint8Array(array, byteOffset, length) | |
} | |
if (Buffer.TYPED_ARRAY_SUPPORT) { | |
// Return an augmented `Uint8Array` instance, for best performance | |
that = array | |
that.__proto__ = Buffer.prototype | |
} else { | |
// Fallback: Return an object instance of the Buffer class | |
that = fromArrayLike(that, array) | |
} | |
return that | |
} | |
function fromObject (that, obj) { | |
if (Buffer.isBuffer(obj)) { | |
var len = checked(obj.length) | 0 | |
that = createBuffer(that, len) | |
if (that.length === 0) { | |
return that | |
} | |
obj.copy(that, 0, 0, len) | |
return that | |
} | |
if (obj) { | |
if ((typeof ArrayBuffer !== 'undefined' && | |
obj.buffer instanceof ArrayBuffer) || 'length' in obj) { | |
if (typeof obj.length !== 'number' || isnan(obj.length)) { | |
return createBuffer(that, 0) | |
} | |
return fromArrayLike(that, obj) | |
} | |
if (obj.type === 'Buffer' && isArray(obj.data)) { | |
return fromArrayLike(that, obj.data) | |
} | |
} | |
throw new TypeError('First argument must be a string, Buffer, ArrayBuffer, Array, or array-like object.') | |
} | |
function checked (length) { | |
// Note: cannot use `length < kMaxLength()` here because that fails when | |
// length is NaN (which is otherwise coerced to zero.) | |
if (length >= kMaxLength()) { | |
throw new RangeError('Attempt to allocate Buffer larger than maximum ' + | |
'size: 0x' + kMaxLength().toString(16) + ' bytes') | |
} | |
return length | 0 | |
} | |
function SlowBuffer (length) { | |
if (+length != length) { // eslint-disable-line eqeqeq | |
length = 0 | |
} | |
return Buffer.alloc(+length) | |
} | |
Buffer.isBuffer = function isBuffer (b) { | |
return !!(b != null && b._isBuffer) | |
} | |
Buffer.compare = function compare (a, b) { | |
if (!Buffer.isBuffer(a) || !Buffer.isBuffer(b)) { | |
throw new TypeError('Arguments must be Buffers') | |
} | |
if (a === b) return 0 | |
var x = a.length | |
var y = b.length | |
for (var i = 0, len = Math.min(x, y); i < len; ++i) { | |
if (a[i] !== b[i]) { | |
x = a[i] | |
y = b[i] | |
break | |
} | |
} | |
if (x < y) return -1 | |
if (y < x) return 1 | |
return 0 | |
} | |
Buffer.isEncoding = function isEncoding (encoding) { | |
switch (String(encoding).toLowerCase()) { | |
case 'hex': | |
case 'utf8': | |
case 'utf-8': | |
case 'ascii': | |
case 'latin1': | |
case 'binary': | |
case 'base64': | |
case 'ucs2': | |
case 'ucs-2': | |
case 'utf16le': | |
case 'utf-16le': | |
return true | |
default: | |
return false | |
} | |
} | |
Buffer.concat = function concat (list, length) { | |
if (!isArray(list)) { | |
throw new TypeError('"list" argument must be an Array of Buffers') | |
} | |
if (list.length === 0) { | |
return Buffer.alloc(0) | |
} | |
var i | |
if (length === undefined) { | |
length = 0 | |
for (i = 0; i < list.length; ++i) { | |
length += list[i].length | |
} | |
} | |
var buffer = Buffer.allocUnsafe(length) | |
var pos = 0 | |
for (i = 0; i < list.length; ++i) { | |
var buf = list[i] | |
if (!Buffer.isBuffer(buf)) { | |
throw new TypeError('"list" argument must be an Array of Buffers') | |
} | |
buf.copy(buffer, pos) | |
pos += buf.length | |
} | |
return buffer | |
} | |
function byteLength (string, encoding) { | |
if (Buffer.isBuffer(string)) { | |
return string.length | |
} | |
if (typeof ArrayBuffer !== 'undefined' && typeof ArrayBuffer.isView === 'function' && | |
(ArrayBuffer.isView(string) || string instanceof ArrayBuffer)) { | |
return string.byteLength | |
} | |
if (typeof string !== 'string') { | |
string = '' + string | |
} | |
var len = string.length | |
if (len === 0) return 0 | |
// Use a for loop to avoid recursion | |
var loweredCase = false | |
for (;;) { | |
switch (encoding) { | |
case 'ascii': | |
case 'latin1': | |
case 'binary': | |
return len | |
case 'utf8': | |
case 'utf-8': | |
case undefined: | |
return utf8ToBytes(string).length | |
case 'ucs2': | |
case 'ucs-2': | |
case 'utf16le': | |
case 'utf-16le': | |
return len * 2 | |
case 'hex': | |
return len >>> 1 | |
case 'base64': | |
return base64ToBytes(string).length | |
default: | |
if (loweredCase) return utf8ToBytes(string).length // assume utf8 | |
encoding = ('' + encoding).toLowerCase() | |
loweredCase = true | |
} | |
} | |
} | |
Buffer.byteLength = byteLength | |
function slowToString (encoding, start, end) { | |
var loweredCase = false | |
// No need to verify that "this.length <= MAX_UINT32" since it's a read-only | |
// property of a typed array. | |
// This behaves neither like String nor Uint8Array in that we set start/end | |
// to their upper/lower bounds if the value passed is out of range. | |
// undefined is handled specially as per ECMA-262 6th Edition, | |
// Section 13.3.3.7 Runtime Semantics: KeyedBindingInitialization. | |
if (start === undefined || start < 0) { | |
start = 0 | |
} | |
// Return early if start > this.length. Done here to prevent potential uint32 | |
// coercion fail below. | |
if (start > this.length) { | |
return '' | |
} | |
if (end === undefined || end > this.length) { | |
end = this.length | |
} | |
if (end <= 0) { | |
return '' | |
} | |
// Force coersion to uint32. This will also coerce falsey/NaN values to 0. | |
end >>>= 0 | |
start >>>= 0 | |
if (end <= start) { | |
return '' | |
} | |
if (!encoding) encoding = 'utf8' | |
while (true) { | |
switch (encoding) { | |
case 'hex': | |
return hexSlice(this, start, end) | |
case 'utf8': | |
case 'utf-8': | |
return utf8Slice(this, start, end) | |
case 'ascii': | |
return asciiSlice(this, start, end) | |
case 'latin1': | |
case 'binary': | |
return latin1Slice(this, start, end) | |
case 'base64': | |
return base64Slice(this, start, end) | |
case 'ucs2': | |
case 'ucs-2': | |
case 'utf16le': | |
case 'utf-16le': | |
return utf16leSlice(this, start, end) | |
default: | |
if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding) | |
encoding = (encoding + '').toLowerCase() | |
loweredCase = true | |
} | |
} | |
} | |
// The property is used by `Buffer.isBuffer` and `is-buffer` (in Safari 5-7) to detect | |
// Buffer instances. | |
Buffer.prototype._isBuffer = true | |
function swap (b, n, m) { | |
var i = b[n] | |
b[n] = b[m] | |
b[m] = i | |
} | |
Buffer.prototype.swap16 = function swap16 () { | |
var len = this.length | |
if (len % 2 !== 0) { | |
throw new RangeError('Buffer size must be a multiple of 16-bits') | |
} | |
for (var i = 0; i < len; i += 2) { | |
swap(this, i, i + 1) | |
} | |
return this | |
} | |
Buffer.prototype.swap32 = function swap32 () { | |
var len = this.length | |
if (len % 4 !== 0) { | |
throw new RangeError('Buffer size must be a multiple of 32-bits') | |
} | |
for (var i = 0; i < len; i += 4) { | |
swap(this, i, i + 3) | |
swap(this, i + 1, i + 2) | |
} | |
return this | |
} | |
Buffer.prototype.swap64 = function swap64 () { | |
var len = this.length | |
if (len % 8 !== 0) { | |
throw new RangeError('Buffer size must be a multiple of 64-bits') | |
} | |
for (var i = 0; i < len; i += 8) { | |
swap(this, i, i + 7) | |
swap(this, i + 1, i + 6) | |
swap(this, i + 2, i + 5) | |
swap(this, i + 3, i + 4) | |
} | |
return this | |
} | |
Buffer.prototype.toString = function toString () { | |
var length = this.length | 0 | |
if (length === 0) return '' | |
if (arguments.length === 0) return utf8Slice(this, 0, length) | |
return slowToString.apply(this, arguments) | |
} | |
Buffer.prototype.equals = function equals (b) { | |
if (!Buffer.isBuffer(b)) throw new TypeError('Argument must be a Buffer') | |
if (this === b) return true | |
return Buffer.compare(this, b) === 0 | |
} | |
Buffer.prototype.inspect = function inspect () { | |
var str = '' | |
var max = exports.INSPECT_MAX_BYTES | |
if (this.length > 0) { | |
str = this.toString('hex', 0, max).match(/.{2}/g).join(' ') | |
if (this.length > max) str += ' ... ' | |
} | |
return '<Buffer ' + str + '>' | |
} | |
Buffer.prototype.compare = function compare (target, start, end, thisStart, thisEnd) { | |
if (!Buffer.isBuffer(target)) { | |
throw new TypeError('Argument must be a Buffer') | |
} | |
if (start === undefined) { | |
start = 0 | |
} | |
if (end === undefined) { | |
end = target ? target.length : 0 | |
} | |
if (thisStart === undefined) { | |
thisStart = 0 | |
} | |
if (thisEnd === undefined) { | |
thisEnd = this.length | |
} | |
if (start < 0 || end > target.length || thisStart < 0 || thisEnd > this.length) { | |
throw new RangeError('out of range index') | |
} | |
if (thisStart >= thisEnd && start >= end) { | |
return 0 | |
} | |
if (thisStart >= thisEnd) { | |
return -1 | |
} | |
if (start >= end) { | |
return 1 | |
} | |
start >>>= 0 | |
end >>>= 0 | |
thisStart >>>= 0 | |
thisEnd >>>= 0 | |
if (this === target) return 0 | |
var x = thisEnd - thisStart | |
var y = end - start | |
var len = Math.min(x, y) | |
var thisCopy = this.slice(thisStart, thisEnd) | |
var targetCopy = target.slice(start, end) | |
for (var i = 0; i < len; ++i) { | |
if (thisCopy[i] !== targetCopy[i]) { | |
x = thisCopy[i] | |
y = targetCopy[i] | |
break | |
} | |
} | |
if (x < y) return -1 | |
if (y < x) return 1 | |
return 0 | |
} | |
// Finds either the first index of `val` in `buffer` at offset >= `byteOffset`, | |
// OR the last index of `val` in `buffer` at offset <= `byteOffset`. | |
// | |
// Arguments: | |
// - buffer - a Buffer to search | |
// - val - a string, Buffer, or number | |
// - byteOffset - an index into `buffer`; will be clamped to an int32 | |
// - encoding - an optional encoding, relevant is val is a string | |
// - dir - true for indexOf, false for lastIndexOf | |
function bidirectionalIndexOf (buffer, val, byteOffset, encoding, dir) { | |
// Empty buffer means no match | |
if (buffer.length === 0) return -1 | |
// Normalize byteOffset | |
if (typeof byteOffset === 'string') { | |
encoding = byteOffset | |
byteOffset = 0 | |
} else if (byteOffset > 0x7fffffff) { | |
byteOffset = 0x7fffffff | |
} else if (byteOffset < -0x80000000) { | |
byteOffset = -0x80000000 | |
} | |
byteOffset = +byteOffset // Coerce to Number. | |
if (isNaN(byteOffset)) { | |
// byteOffset: it it's undefined, null, NaN, "foo", etc, search whole buffer | |
byteOffset = dir ? 0 : (buffer.length - 1) | |
} | |
// Normalize byteOffset: negative offsets start from the end of the buffer | |
if (byteOffset < 0) byteOffset = buffer.length + byteOffset | |
if (byteOffset >= buffer.length) { | |
if (dir) return -1 | |
else byteOffset = buffer.length - 1 | |
} else if (byteOffset < 0) { | |
if (dir) byteOffset = 0 | |
else return -1 | |
} | |
// Normalize val | |
if (typeof val === 'string') { | |
val = Buffer.from(val, encoding) | |
} | |
// Finally, search either indexOf (if dir is true) or lastIndexOf | |
if (Buffer.isBuffer(val)) { | |
// Special case: looking for empty string/buffer always fails | |
if (val.length === 0) { | |
return -1 | |
} | |
return arrayIndexOf(buffer, val, byteOffset, encoding, dir) | |
} else if (typeof val === 'number') { | |
val = val & 0xFF // Search for a byte value [0-255] | |
if (Buffer.TYPED_ARRAY_SUPPORT && | |
typeof Uint8Array.prototype.indexOf === 'function') { | |
if (dir) { | |
return Uint8Array.prototype.indexOf.call(buffer, val, byteOffset) | |
} else { | |
return Uint8Array.prototype.lastIndexOf.call(buffer, val, byteOffset) | |
} | |
} | |
return arrayIndexOf(buffer, [ val ], byteOffset, encoding, dir) | |
} | |
throw new TypeError('val must be string, number or Buffer') | |
} | |
function arrayIndexOf (arr, val, byteOffset, encoding, dir) { | |
var indexSize = 1 | |
var arrLength = arr.length | |
var valLength = val.length | |
if (encoding !== undefined) { | |
encoding = String(encoding).toLowerCase() | |
if (encoding === 'ucs2' || encoding === 'ucs-2' || | |
encoding === 'utf16le' || encoding === 'utf-16le') { | |
if (arr.length < 2 || val.length < 2) { | |
return -1 | |
} | |
indexSize = 2 | |
arrLength /= 2 | |
valLength /= 2 | |
byteOffset /= 2 | |
} | |
} | |
function read (buf, i) { | |
if (indexSize === 1) { | |
return buf[i] | |
} else { | |
return buf.readUInt16BE(i * indexSize) | |
} | |
} | |
var i | |
if (dir) { | |
var foundIndex = -1 | |
for (i = byteOffset; i < arrLength; i++) { | |
if (read(arr, i) === read(val, foundIndex === -1 ? 0 : i - foundIndex)) { | |
if (foundIndex === -1) foundIndex = i | |
if (i - foundIndex + 1 === valLength) return foundIndex * indexSize | |
} else { | |
if (foundIndex !== -1) i -= i - foundIndex | |
foundIndex = -1 | |
} | |
} | |
} else { | |
if (byteOffset + valLength > arrLength) byteOffset = arrLength - valLength | |
for (i = byteOffset; i >= 0; i--) { | |
var found = true | |
for (var j = 0; j < valLength; j++) { | |
if (read(arr, i + j) !== read(val, j)) { | |
found = false | |
break | |
} | |
} | |
if (found) return i | |
} | |
} | |
return -1 | |
} | |
Buffer.prototype.includes = function includes (val, byteOffset, encoding) { | |
return this.indexOf(val, byteOffset, encoding) !== -1 | |
} | |
Buffer.prototype.indexOf = function indexOf (val, byteOffset, encoding) { | |
return bidirectionalIndexOf(this, val, byteOffset, encoding, true) | |
} | |
Buffer.prototype.lastIndexOf = function lastIndexOf (val, byteOffset, encoding) { | |
return bidirectionalIndexOf(this, val, byteOffset, encoding, false) | |
} | |
function hexWrite (buf, string, offset, length) { | |
offset = Number(offset) || 0 | |
var remaining = buf.length - offset | |
if (!length) { | |
length = remaining | |
} else { | |
length = Number(length) | |
if (length > remaining) { | |
length = remaining | |
} | |
} | |
// must be an even number of digits | |
var strLen = string.length | |
if (strLen % 2 !== 0) throw new TypeError('Invalid hex string') | |
if (length > strLen / 2) { | |
length = strLen / 2 | |
} | |
for (var i = 0; i < length; ++i) { | |
var parsed = parseInt(string.substr(i * 2, 2), 16) | |
if (isNaN(parsed)) return i | |
buf[offset + i] = parsed | |
} | |
return i | |
} | |
function utf8Write (buf, string, offset, length) { | |
return blitBuffer(utf8ToBytes(string, buf.length - offset), buf, offset, length) | |
} | |
function asciiWrite (buf, string, offset, length) { | |
return blitBuffer(asciiToBytes(string), buf, offset, length) | |
} | |
function latin1Write (buf, string, offset, length) { | |
return asciiWrite(buf, string, offset, length) | |
} | |
function base64Write (buf, string, offset, length) { | |
return blitBuffer(base64ToBytes(string), buf, offset, length) | |
} | |
function ucs2Write (buf, string, offset, length) { | |
return blitBuffer(utf16leToBytes(string, buf.length - offset), buf, offset, length) | |
} | |
Buffer.prototype.write = function write (string, offset, length, encoding) { | |
// Buffer#write(string) | |
if (offset === undefined) { | |
encoding = 'utf8' | |
length = this.length | |
offset = 0 | |
// Buffer#write(string, encoding) | |
} else if (length === undefined && typeof offset === 'string') { | |
encoding = offset | |
length = this.length | |
offset = 0 | |
// Buffer#write(string, offset[, length][, encoding]) | |
} else if (isFinite(offset)) { | |
offset = offset | 0 | |
if (isFinite(length)) { | |
length = length | 0 | |
if (encoding === undefined) encoding = 'utf8' | |
} else { | |
encoding = length | |
length = undefined | |
} | |
// legacy write(string, encoding, offset, length) - remove in v0.13 | |
} else { | |
throw new Error( | |
'Buffer.write(string, encoding, offset[, length]) is no longer supported' | |
) | |
} | |
var remaining = this.length - offset | |
if (length === undefined || length > remaining) length = remaining | |
if ((string.length > 0 && (length < 0 || offset < 0)) || offset > this.length) { | |
throw new RangeError('Attempt to write outside buffer bounds') | |
} | |
if (!encoding) encoding = 'utf8' | |
var loweredCase = false | |
for (;;) { | |
switch (encoding) { | |
case 'hex': | |
return hexWrite(this, string, offset, length) | |
case 'utf8': | |
case 'utf-8': | |
return utf8Write(this, string, offset, length) | |
case 'ascii': | |
return asciiWrite(this, string, offset, length) | |
case 'latin1': | |
case 'binary': | |
return latin1Write(this, string, offset, length) | |
case 'base64': | |
// Warning: maxLength not taken into account in base64Write | |
return base64Write(this, string, offset, length) | |
case 'ucs2': | |
case 'ucs-2': | |
case 'utf16le': | |
case 'utf-16le': | |
return ucs2Write(this, string, offset, length) | |
default: | |
if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding) | |
encoding = ('' + encoding).toLowerCase() | |
loweredCase = true | |
} | |
} | |
} | |
Buffer.prototype.toJSON = function toJSON () { | |
return { | |
type: 'Buffer', | |
data: Array.prototype.slice.call(this._arr || this, 0) | |
} | |
} | |
function base64Slice (buf, start, end) { | |
if (start === 0 && end === buf.length) { | |
return base64.fromByteArray(buf) | |
} else { | |
return base64.fromByteArray(buf.slice(start, end)) | |
} | |
} | |
function utf8Slice (buf, start, end) { | |
end = Math.min(buf.length, end) | |
var res = [] | |
var i = start | |
while (i < end) { | |
var firstByte = buf[i] | |
var codePoint = null | |
var bytesPerSequence = (firstByte > 0xEF) ? 4 | |
: (firstByte > 0xDF) ? 3 | |
: (firstByte > 0xBF) ? 2 | |
: 1 | |
if (i + bytesPerSequence <= end) { | |
var secondByte, thirdByte, fourthByte, tempCodePoint | |
switch (bytesPerSequence) { | |
case 1: | |
if (firstByte < 0x80) { | |
codePoint = firstByte | |
} | |
break | |
case 2: | |
secondByte = buf[i + 1] | |
if ((secondByte & 0xC0) === 0x80) { | |
tempCodePoint = (firstByte & 0x1F) << 0x6 | (secondByte & 0x3F) | |
if (tempCodePoint > 0x7F) { | |
codePoint = tempCodePoint | |
} | |
} | |
break | |
case 3: | |
secondByte = buf[i + 1] | |
thirdByte = buf[i + 2] | |
if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80) { | |
tempCodePoint = (firstByte & 0xF) << 0xC | (secondByte & 0x3F) << 0x6 | (thirdByte & 0x3F) | |
if (tempCodePoint > 0x7FF && (tempCodePoint < 0xD800 || tempCodePoint > 0xDFFF)) { | |
codePoint = tempCodePoint | |
} | |
} | |
break | |
case 4: | |
secondByte = buf[i + 1] | |
thirdByte = buf[i + 2] | |
fourthByte = buf[i + 3] | |
if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80 && (fourthByte & 0xC0) === 0x80) { | |
tempCodePoint = (firstByte & 0xF) << 0x12 | (secondByte & 0x3F) << 0xC | (thirdByte & 0x3F) << 0x6 | (fourthByte & 0x3F) | |
if (tempCodePoint > 0xFFFF && tempCodePoint < 0x110000) { | |
codePoint = tempCodePoint | |
} | |
} | |
} | |
} | |
if (codePoint === null) { | |
// we did not generate a valid codePoint so insert a | |
// replacement char (U+FFFD) and advance only 1 byte | |
codePoint = 0xFFFD | |
bytesPerSequence = 1 | |
} else if (codePoint > 0xFFFF) { | |
// encode to utf16 (surrogate pair dance) | |
codePoint -= 0x10000 | |
res.push(codePoint >>> 10 & 0x3FF | 0xD800) | |
codePoint = 0xDC00 | codePoint & 0x3FF | |
} | |
res.push(codePoint) | |
i += bytesPerSequence | |
} | |
return decodeCodePointsArray(res) | |
} | |
// Based on http://stackoverflow.com/a/22747272/680742, the browser with | |
// the lowest limit is Chrome, with 0x10000 args. | |
// We go 1 magnitude less, for safety | |
var MAX_ARGUMENTS_LENGTH = 0x1000 | |
function decodeCodePointsArray (codePoints) { | |
var len = codePoints.length | |
if (len <= MAX_ARGUMENTS_LENGTH) { | |
return String.fromCharCode.apply(String, codePoints) // avoid extra slice() | |
} | |
// Decode in chunks to avoid "call stack size exceeded". | |
var res = '' | |
var i = 0 | |
while (i < len) { | |
res += String.fromCharCode.apply( | |
String, | |
codePoints.slice(i, i += MAX_ARGUMENTS_LENGTH) | |
) | |
} | |
return res | |
} | |
function asciiSlice (buf, start, end) { | |
var ret = '' | |
end = Math.min(buf.length, end) | |
for (var i = start; i < end; ++i) { | |
ret += String.fromCharCode(buf[i] & 0x7F) | |
} | |
return ret | |
} | |
function latin1Slice (buf, start, end) { | |
var ret = '' | |
end = Math.min(buf.length, end) | |
for (var i = start; i < end; ++i) { | |
ret += String.fromCharCode(buf[i]) | |
} | |
return ret | |
} | |
function hexSlice (buf, start, end) { | |
var len = buf.length | |
if (!start || start < 0) start = 0 | |
if (!end || end < 0 || end > len) end = len | |
var out = '' | |
for (var i = start; i < end; ++i) { | |
out += toHex(buf[i]) | |
} | |
return out | |
} | |
function utf16leSlice (buf, start, end) { | |
var bytes = buf.slice(start, end) | |
var res = '' | |
for (var i = 0; i < bytes.length; i += 2) { | |
res += String.fromCharCode(bytes[i] + bytes[i + 1] * 256) | |
} | |
return res | |
} | |
Buffer.prototype.slice = function slice (start, end) { | |
var len = this.length | |
start = ~~start | |
end = end === undefined ? len : ~~end | |
if (start < 0) { | |
start += len | |
if (start < 0) start = 0 | |
} else if (start > len) { | |
start = len | |
} | |
if (end < 0) { | |
end += len | |
if (end < 0) end = 0 | |
} else if (end > len) { | |
end = len | |
} | |
if (end < start) end = start | |
var newBuf | |
if (Buffer.TYPED_ARRAY_SUPPORT) { | |
newBuf = this.subarray(start, end) | |
newBuf.__proto__ = Buffer.prototype | |
} else { | |
var sliceLen = end - start | |
newBuf = new Buffer(sliceLen, undefined) | |
for (var i = 0; i < sliceLen; ++i) { | |
newBuf[i] = this[i + start] | |
} | |
} | |
return newBuf | |
} | |
/* | |
* Need to make sure that buffer isn't trying to write out of bounds. | |
*/ | |
function checkOffset (offset, ext, length) { | |
if ((offset % 1) !== 0 || offset < 0) throw new RangeError('offset is not uint') | |
if (offset + ext > length) throw new RangeError('Trying to access beyond buffer length') | |
} | |
Buffer.prototype.readUIntLE = function readUIntLE (offset, byteLength, noAssert) { | |
offset = offset | 0 | |
byteLength = byteLength | 0 | |
if (!noAssert) checkOffset(offset, byteLength, this.length) | |
var val = this[offset] | |
var mul = 1 | |
var i = 0 | |
while (++i < byteLength && (mul *= 0x100)) { | |
val += this[offset + i] * mul | |
} | |
return val | |
} | |
Buffer.prototype.readUIntBE = function readUIntBE (offset, byteLength, noAssert) { | |
offset = offset | 0 | |
byteLength = byteLength | 0 | |
if (!noAssert) { | |
checkOffset(offset, byteLength, this.length) | |
} | |
var val = this[offset + --byteLength] | |
var mul = 1 | |
while (byteLength > 0 && (mul *= 0x100)) { | |
val += this[offset + --byteLength] * mul | |
} | |
return val | |
} | |
Buffer.prototype.readUInt8 = function readUInt8 (offset, noAssert) { | |
if (!noAssert) checkOffset(offset, 1, this.length) | |
return this[offset] | |
} | |
Buffer.prototype.readUInt16LE = function readUInt16LE (offset, noAssert) { | |
if (!noAssert) checkOffset(offset, 2, this.length) | |
return this[offset] | (this[offset + 1] << 8) | |
} | |
Buffer.prototype.readUInt16BE = function readUInt16BE (offset, noAssert) { | |
if (!noAssert) checkOffset(offset, 2, this.length) | |
return (this[offset] << 8) | this[offset + 1] | |
} | |
Buffer.prototype.readUInt32LE = function readUInt32LE (offset, noAssert) { | |
if (!noAssert) checkOffset(offset, 4, this.length) | |
return ((this[offset]) | | |
(this[offset + 1] << 8) | | |
(this[offset + 2] << 16)) + | |
(this[offset + 3] * 0x1000000) | |
} | |
Buffer.prototype.readUInt32BE = function readUInt32BE (offset, noAssert) { | |
if (!noAssert) checkOffset(offset, 4, this.length) | |
return (this[offset] * 0x1000000) + | |
((this[offset + 1] << 16) | | |
(this[offset + 2] << 8) | | |
this[offset + 3]) | |
} | |
Buffer.prototype.readIntLE = function readIntLE (offset, byteLength, noAssert) { | |
offset = offset | 0 | |
byteLength = byteLength | 0 | |
if (!noAssert) checkOffset(offset, byteLength, this.length) | |
var val = this[offset] | |
var mul = 1 | |
var i = 0 | |
while (++i < byteLength && (mul *= 0x100)) { | |
val += this[offset + i] * mul | |
} | |
mul *= 0x80 | |
if (val >= mul) val -= Math.pow(2, 8 * byteLength) | |
return val | |
} | |
Buffer.prototype.readIntBE = function readIntBE (offset, byteLength, noAssert) { | |
offset = offset | 0 | |
byteLength = byteLength | 0 | |
if (!noAssert) checkOffset(offset, byteLength, this.length) | |
var i = byteLength | |
var mul = 1 | |
var val = this[offset + --i] | |
while (i > 0 && (mul *= 0x100)) { | |
val += this[offset + --i] * mul | |
} | |
mul *= 0x80 | |
if (val >= mul) val -= Math.pow(2, 8 * byteLength) | |
return val | |
} | |
Buffer.prototype.readInt8 = function readInt8 (offset, noAssert) { | |
if (!noAssert) checkOffset(offset, 1, this.length) | |
if (!(this[offset] & 0x80)) return (this[offset]) | |
return ((0xff - this[offset] + 1) * -1) | |
} | |
Buffer.prototype.readInt16LE = function readInt16LE (offset, noAssert) { | |
if (!noAssert) checkOffset(offset, 2, this.length) | |
var val = this[offset] | (this[offset + 1] << 8) | |
return (val & 0x8000) ? val | 0xFFFF0000 : val | |
} | |
Buffer.prototype.readInt16BE = function readInt16BE (offset, noAssert) { | |
if (!noAssert) checkOffset(offset, 2, this.length) | |
var val = this[offset + 1] | (this[offset] << 8) | |
return (val & 0x8000) ? val | 0xFFFF0000 : val | |
} | |
Buffer.prototype.readInt32LE = function readInt32LE (offset, noAssert) { | |
if (!noAssert) checkOffset(offset, 4, this.length) | |
return (this[offset]) | | |
(this[offset + 1] << 8) | | |
(this[offset + 2] << 16) | | |
(this[offset + 3] << 24) | |
} | |
Buffer.prototype.readInt32BE = function readInt32BE (offset, noAssert) { | |
if (!noAssert) checkOffset(offset, 4, this.length) | |
return (this[offset] << 24) | | |
(this[offset + 1] << 16) | | |
(this[offset + 2] << 8) | | |
(this[offset + 3]) | |
} | |
Buffer.prototype.readFloatLE = function readFloatLE (offset, noAssert) { | |
if (!noAssert) checkOffset(offset, 4, this.length) | |
return ieee754.read(this, offset, true, 23, 4) | |
} | |
Buffer.prototype.readFloatBE = function readFloatBE (offset, noAssert) { | |
if (!noAssert) checkOffset(offset, 4, this.length) | |
return ieee754.read(this, offset, false, 23, 4) | |
} | |
Buffer.prototype.readDoubleLE = function readDoubleLE (offset, noAssert) { | |
if (!noAssert) checkOffset(offset, 8, this.length) | |
return ieee754.read(this, offset, true, 52, 8) | |
} | |
Buffer.prototype.readDoubleBE = function readDoubleBE (offset, noAssert) { | |
if (!noAssert) checkOffset(offset, 8, this.length) | |
return ieee754.read(this, offset, false, 52, 8) | |
} | |
function checkInt (buf, value, offset, ext, max, min) { | |
if (!Buffer.isBuffer(buf)) throw new TypeError('"buffer" argument must be a Buffer instance') | |
if (value > max || value < min) throw new RangeError('"value" argument is out of bounds') | |
if (offset + ext > buf.length) throw new RangeError('Index out of range') | |
} | |
Buffer.prototype.writeUIntLE = function writeUIntLE (value, offset, byteLength, noAssert) { | |
value = +value | |
offset = offset | 0 | |
byteLength = byteLength | 0 | |
if (!noAssert) { | |
var maxBytes = Math.pow(2, 8 * byteLength) - 1 | |
checkInt(this, value, offset, byteLength, maxBytes, 0) | |
} | |
var mul = 1 | |
var i = 0 | |
this[offset] = value & 0xFF | |
while (++i < byteLength && (mul *= 0x100)) { | |
this[offset + i] = (value / mul) & 0xFF | |
} | |
return offset + byteLength | |
} | |
Buffer.prototype.writeUIntBE = function writeUIntBE (value, offset, byteLength, noAssert) { | |
value = +value | |
offset = offset | 0 | |
byteLength = byteLength | 0 | |
if (!noAssert) { | |
var maxBytes = Math.pow(2, 8 * byteLength) - 1 | |
checkInt(this, value, offset, byteLength, maxBytes, 0) | |
} | |
var i = byteLength - 1 | |
var mul = 1 | |
this[offset + i] = value & 0xFF | |
while (--i >= 0 && (mul *= 0x100)) { | |
this[offset + i] = (value / mul) & 0xFF | |
} | |
return offset + byteLength | |
} | |
Buffer.prototype.writeUInt8 = function writeUInt8 (value, offset, noAssert) { | |
value = +value | |
offset = offset | 0 | |
if (!noAssert) checkInt(this, value, offset, 1, 0xff, 0) | |
if (!Buffer.TYPED_ARRAY_SUPPORT) value = Math.floor(value) | |
this[offset] = (value & 0xff) | |
return offset + 1 | |
} | |
function objectWriteUInt16 (buf, value, offset, littleEndian) { | |
if (value < 0) value = 0xffff + value + 1 | |
for (var i = 0, j = Math.min(buf.length - offset, 2); i < j; ++i) { | |
buf[offset + i] = (value & (0xff << (8 * (littleEndian ? i : 1 - i)))) >>> | |
(littleEndian ? i : 1 - i) * 8 | |
} | |
} | |
Buffer.prototype.writeUInt16LE = function writeUInt16LE (value, offset, noAssert) { | |
value = +value | |
offset = offset | 0 | |
if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0) | |
if (Buffer.TYPED_ARRAY_SUPPORT) { | |
this[offset] = (value & 0xff) | |
this[offset + 1] = (value >>> 8) | |
} else { | |
objectWriteUInt16(this, value, offset, true) | |
} | |
return offset + 2 | |
} | |
Buffer.prototype.writeUInt16BE = function writeUInt16BE (value, offset, noAssert) { | |
value = +value | |
offset = offset | 0 | |
if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0) | |
if (Buffer.TYPED_ARRAY_SUPPORT) { | |
this[offset] = (value >>> 8) | |
this[offset + 1] = (value & 0xff) | |
} else { | |
objectWriteUInt16(this, value, offset, false) | |
} | |
return offset + 2 | |
} | |
function objectWriteUInt32 (buf, value, offset, littleEndian) { | |
if (value < 0) value = 0xffffffff + value + 1 | |
for (var i = 0, j = Math.min(buf.length - offset, 4); i < j; ++i) { | |
buf[offset + i] = (value >>> (littleEndian ? i : 3 - i) * 8) & 0xff | |
} | |
} | |
Buffer.prototype.writeUInt32LE = function writeUInt32LE (value, offset, noAssert) { | |
value = +value | |
offset = offset | 0 | |
if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0) | |
if (Buffer.TYPED_ARRAY_SUPPORT) { | |
this[offset + 3] = (value >>> 24) | |
this[offset + 2] = (value >>> 16) | |
this[offset + 1] = (value >>> 8) | |
this[offset] = (value & 0xff) | |
} else { | |
objectWriteUInt32(this, value, offset, true) | |
} | |
return offset + 4 | |
} | |
Buffer.prototype.writeUInt32BE = function writeUInt32BE (value, offset, noAssert) { | |
value = +value | |
offset = offset | 0 | |
if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0) | |
if (Buffer.TYPED_ARRAY_SUPPORT) { | |
this[offset] = (value >>> 24) | |
this[offset + 1] = (value >>> 16) | |
this[offset + 2] = (value >>> 8) | |
this[offset + 3] = (value & 0xff) | |
} else { | |
objectWriteUInt32(this, value, offset, false) | |
} | |
return offset + 4 | |
} | |
Buffer.prototype.writeIntLE = function writeIntLE (value, offset, byteLength, noAssert) { | |
value = +value | |
offset = offset | 0 | |
if (!noAssert) { | |
var limit = Math.pow(2, 8 * byteLength - 1) | |
checkInt(this, value, offset, byteLength, limit - 1, -limit) | |
} | |
var i = 0 | |
var mul = 1 | |
var sub = 0 | |
this[offset] = value & 0xFF | |
while (++i < byteLength && (mul *= 0x100)) { | |
if (value < 0 && sub === 0 && this[offset + i - 1] !== 0) { | |
sub = 1 | |
} | |
this[offset + i] = ((value / mul) >> 0) - sub & 0xFF | |
} | |
return offset + byteLength | |
} | |
Buffer.prototype.writeIntBE = function writeIntBE (value, offset, byteLength, noAssert) { | |
value = +value | |
offset = offset | 0 | |
if (!noAssert) { | |
var limit = Math.pow(2, 8 * byteLength - 1) | |
checkInt(this, value, offset, byteLength, limit - 1, -limit) | |
} | |
var i = byteLength - 1 | |
var mul = 1 | |
var sub = 0 | |
this[offset + i] = value & 0xFF | |
while (--i >= 0 && (mul *= 0x100)) { | |
if (value < 0 && sub === 0 && this[offset + i + 1] !== 0) { | |
sub = 1 | |
} | |
this[offset + i] = ((value / mul) >> 0) - sub & 0xFF | |
} | |
return offset + byteLength | |
} | |
Buffer.prototype.writeInt8 = function writeInt8 (value, offset, noAssert) { | |
value = +value | |
offset = offset | 0 | |
if (!noAssert) checkInt(this, value, offset, 1, 0x7f, -0x80) | |
if (!Buffer.TYPED_ARRAY_SUPPORT) value = Math.floor(value) | |
if (value < 0) value = 0xff + value + 1 | |
this[offset] = (value & 0xff) | |
return offset + 1 | |
} | |
Buffer.prototype.writeInt16LE = function writeInt16LE (value, offset, noAssert) { | |
value = +value | |
offset = offset | 0 | |
if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000) | |
if (Buffer.TYPED_ARRAY_SUPPORT) { | |
this[offset] = (value & 0xff) | |
this[offset + 1] = (value >>> 8) | |
} else { | |
objectWriteUInt16(this, value, offset, true) | |
} | |
return offset + 2 | |
} | |
Buffer.prototype.writeInt16BE = function writeInt16BE (value, offset, noAssert) { | |
value = +value | |
offset = offset | 0 | |
if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000) | |
if (Buffer.TYPED_ARRAY_SUPPORT) { | |
this[offset] = (value >>> 8) | |
this[offset + 1] = (value & 0xff) | |
} else { | |
objectWriteUInt16(this, value, offset, false) | |
} | |
return offset + 2 | |
} | |
Buffer.prototype.writeInt32LE = function writeInt32LE (value, offset, noAssert) { | |
value = +value | |
offset = offset | 0 | |
if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000) | |
if (Buffer.TYPED_ARRAY_SUPPORT) { | |
this[offset] = (value & 0xff) | |
this[offset + 1] = (value >>> 8) | |
this[offset + 2] = (value >>> 16) | |
this[offset + 3] = (value >>> 24) | |
} else { | |
objectWriteUInt32(this, value, offset, true) | |
} | |
return offset + 4 | |
} | |
Buffer.prototype.writeInt32BE = function writeInt32BE (value, offset, noAssert) { | |
value = +value | |
offset = offset | 0 | |
if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000) | |
if (value < 0) value = 0xffffffff + value + 1 | |
if (Buffer.TYPED_ARRAY_SUPPORT) { | |
this[offset] = (value >>> 24) | |
this[offset + 1] = (value >>> 16) | |
this[offset + 2] = (value >>> 8) | |
this[offset + 3] = (value & 0xff) | |
} else { | |
objectWriteUInt32(this, value, offset, false) | |
} | |
return offset + 4 | |
} | |
function checkIEEE754 (buf, value, offset, ext, max, min) { | |
if (offset + ext > buf.length) throw new RangeError('Index out of range') | |
if (offset < 0) throw new RangeError('Index out of range') | |
} | |
function writeFloat (buf, value, offset, littleEndian, noAssert) { | |
if (!noAssert) { | |
checkIEEE754(buf, value, offset, 4, 3.4028234663852886e+38, -3.4028234663852886e+38) | |
} | |
ieee754.write(buf, value, offset, littleEndian, 23, 4) | |
return offset + 4 | |
} | |
Buffer.prototype.writeFloatLE = function writeFloatLE (value, offset, noAssert) { | |
return writeFloat(this, value, offset, true, noAssert) | |
} | |
Buffer.prototype.writeFloatBE = function writeFloatBE (value, offset, noAssert) { | |
return writeFloat(this, value, offset, false, noAssert) | |
} | |
function writeDouble (buf, value, offset, littleEndian, noAssert) { | |
if (!noAssert) { | |
checkIEEE754(buf, value, offset, 8, 1.7976931348623157E+308, -1.7976931348623157E+308) | |
} | |
ieee754.write(buf, value, offset, littleEndian, 52, 8) | |
return offset + 8 | |
} | |
Buffer.prototype.writeDoubleLE = function writeDoubleLE (value, offset, noAssert) { | |
return writeDouble(this, value, offset, true, noAssert) | |
} | |
Buffer.prototype.writeDoubleBE = function writeDoubleBE (value, offset, noAssert) { | |
return writeDouble(this, value, offset, false, noAssert) | |
} | |
// copy(targetBuffer, targetStart=0, sourceStart=0, sourceEnd=buffer.length) | |
Buffer.prototype.copy = function copy (target, targetStart, start, end) { | |
if (!start) start = 0 | |
if (!end && end !== 0) end = this.length | |
if (targetStart >= target.length) targetStart = target.length | |
if (!targetStart) targetStart = 0 | |
if (end > 0 && end < start) end = start | |
// Copy 0 bytes; we're done | |
if (end === start) return 0 | |
if (target.length === 0 || this.length === 0) return 0 | |
// Fatal error conditions | |
if (targetStart < 0) { | |
throw new RangeError('targetStart out of bounds') | |
} | |
if (start < 0 || start >= this.length) throw new RangeError('sourceStart out of bounds') | |
if (end < 0) throw new RangeError('sourceEnd out of bounds') | |
// Are we oob? | |
if (end > this.length) end = this.length | |
if (target.length - targetStart < end - start) { | |
end = target.length - targetStart + start | |
} | |
var len = end - start | |
var i | |
if (this === target && start < targetStart && targetStart < end) { | |
// descending copy from end | |
for (i = len - 1; i >= 0; --i) { | |
target[i + targetStart] = this[i + start] | |
} | |
} else if (len < 1000 || !Buffer.TYPED_ARRAY_SUPPORT) { | |
// ascending copy from start | |
for (i = 0; i < len; ++i) { | |
target[i + targetStart] = this[i + start] | |
} | |
} else { | |
Uint8Array.prototype.set.call( | |
target, | |
this.subarray(start, start + len), | |
targetStart | |
) | |
} | |
return len | |
} | |
// Usage: | |
// buffer.fill(number[, offset[, end]]) | |
// buffer.fill(buffer[, offset[, end]]) | |
// buffer.fill(string[, offset[, end]][, encoding]) | |
Buffer.prototype.fill = function fill (val, start, end, encoding) { | |
// Handle string cases: | |
if (typeof val === 'string') { | |
if (typeof start === 'string') { | |
encoding = start | |
start = 0 | |
end = this.length | |
} else if (typeof end === 'string') { | |
encoding = end | |
end = this.length | |
} | |
if (val.length === 1) { | |
var code = val.charCodeAt(0) | |
if (code < 256) { | |
val = code | |
} | |
} | |
if (encoding !== undefined && typeof encoding !== 'string') { | |
throw new TypeError('encoding must be a string') | |
} | |
if (typeof encoding === 'string' && !Buffer.isEncoding(encoding)) { | |
throw new TypeError('Unknown encoding: ' + encoding) | |
} | |
} else if (typeof val === 'number') { | |
val = val & 255 | |
} | |
// Invalid ranges are not set to a default, so can range check early. | |
if (start < 0 || this.length < start || this.length < end) { | |
throw new RangeError('Out of range index') | |
} | |
if (end <= start) { | |
return this | |
} | |
start = start >>> 0 | |
end = end === undefined ? this.length : end >>> 0 | |
if (!val) val = 0 | |
var i | |
if (typeof val === 'number') { | |
for (i = start; i < end; ++i) { | |
this[i] = val | |
} | |
} else { | |
var bytes = Buffer.isBuffer(val) | |
? val | |
: utf8ToBytes(new Buffer(val, encoding).toString()) | |
var len = bytes.length | |
for (i = 0; i < end - start; ++i) { | |
this[i + start] = bytes[i % len] | |
} | |
} | |
return this | |
} | |
// HELPER FUNCTIONS | |
// ================ | |
var INVALID_BASE64_RE = /[^+\/0-9A-Za-z-_]/g | |
function base64clean (str) { | |
// Node strips out invalid characters like \n and \t from the string, base64-js does not | |
str = stringtrim(str).replace(INVALID_BASE64_RE, '') | |
// Node converts strings with length < 2 to '' | |
if (str.length < 2) return '' | |
// Node allows for non-padded base64 strings (missing trailing ===), base64-js does not | |
while (str.length % 4 !== 0) { | |
str = str + '=' | |
} | |
return str | |
} | |
function stringtrim (str) { | |
if (str.trim) return str.trim() | |
return str.replace(/^\s+|\s+$/g, '') | |
} | |
function toHex (n) { | |
if (n < 16) return '0' + n.toString(16) | |
return n.toString(16) | |
} | |
function utf8ToBytes (string, units) { | |
units = units || Infinity | |
var codePoint | |
var length = string.length | |
var leadSurrogate = null | |
var bytes = [] | |
for (var i = 0; i < length; ++i) { | |
codePoint = string.charCodeAt(i) | |
// is surrogate component | |
if (codePoint > 0xD7FF && codePoint < 0xE000) { | |
// last char was a lead | |
if (!leadSurrogate) { | |
// no lead yet | |
if (codePoint > 0xDBFF) { | |
// unexpected trail | |
if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD) | |
continue | |
} else if (i + 1 === length) { | |
// unpaired lead | |
if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD) | |
continue | |
} | |
// valid lead | |
leadSurrogate = codePoint | |
continue | |
} | |
// 2 leads in a row | |
if (codePoint < 0xDC00) { | |
if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD) | |
leadSurrogate = codePoint | |
continue | |
} | |
// valid surrogate pair | |
codePoint = (leadSurrogate - 0xD800 << 10 | codePoint - 0xDC00) + 0x10000 | |
} else if (leadSurrogate) { | |
// valid bmp char, but last char was a lead | |
if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD) | |
} | |
leadSurrogate = null | |
// encode utf8 | |
if (codePoint < 0x80) { | |
if ((units -= 1) < 0) break | |
bytes.push(codePoint) | |
} else if (codePoint < 0x800) { | |
if ((units -= 2) < 0) break | |
bytes.push( | |
codePoint >> 0x6 | 0xC0, | |
codePoint & 0x3F | 0x80 | |
) | |
} else if (codePoint < 0x10000) { | |
if ((units -= 3) < 0) break | |
bytes.push( | |
codePoint >> 0xC | 0xE0, | |
codePoint >> 0x6 & 0x3F | 0x80, | |
codePoint & 0x3F | 0x80 | |
) | |
} else if (codePoint < 0x110000) { | |
if ((units -= 4) < 0) break | |
bytes.push( | |
codePoint >> 0x12 | 0xF0, | |
codePoint >> 0xC & 0x3F | 0x80, | |
codePoint >> 0x6 & 0x3F | 0x80, | |
codePoint & 0x3F | 0x80 | |
) | |
} else { | |
throw new Error('Invalid code point') | |
} | |
} | |
return bytes | |
} | |
function asciiToBytes (str) { | |
var byteArray = [] | |
for (var i = 0; i < str.length; ++i) { | |
// Node's code seems to be doing this and not & 0x7F.. | |
byteArray.push(str.charCodeAt(i) & 0xFF) | |
} | |
return byteArray | |
} | |
function utf16leToBytes (str, units) { | |
var c, hi, lo | |
var byteArray = [] | |
for (var i = 0; i < str.length; ++i) { | |
if ((units -= 2) < 0) break | |
c = str.charCodeAt(i) | |
hi = c >> 8 | |
lo = c % 256 | |
byteArray.push(lo) | |
byteArray.push(hi) | |
} | |
return byteArray | |
} | |
function base64ToBytes (str) { | |
return base64.toByteArray(base64clean(str)) | |
} | |
function blitBuffer (src, dst, offset, length) { | |
for (var i = 0; i < length; ++i) { | |
if ((i + offset >= dst.length) || (i >= src.length)) break | |
dst[i + offset] = src[i] | |
} | |
return i | |
} | |
function isnan (val) { | |
return val !== val // eslint-disable-line no-self-compare | |
} | |
/* WEBPACK VAR INJECTION */}.call(exports, __webpack_require__(2))) | |
/***/ }, | |
/* 1 */ | |
/***/ function(module, exports) { | |
// shim for using process in browser | |
var process = module.exports = {}; | |
// cached from whatever global is present so that test runners that stub it | |
// don't break things. But we need to wrap it in a try catch in case it is | |
// wrapped in strict mode code which doesn't define any globals. It's inside a | |
// function because try/catches deoptimize in certain engines. | |
var cachedSetTimeout; | |
var cachedClearTimeout; | |
function defaultSetTimout() { | |
throw new Error('setTimeout has not been defined'); | |
} | |
function defaultClearTimeout () { | |
throw new Error('clearTimeout has not been defined'); | |
} | |
(function () { | |
try { | |
if (typeof setTimeout === 'function') { | |
cachedSetTimeout = setTimeout; | |
} else { | |
cachedSetTimeout = defaultSetTimout; | |
} | |
} catch (e) { | |
cachedSetTimeout = defaultSetTimout; | |
} | |
try { | |
if (typeof clearTimeout === 'function') { | |
cachedClearTimeout = clearTimeout; | |
} else { | |
cachedClearTimeout = defaultClearTimeout; | |
} | |
} catch (e) { | |
cachedClearTimeout = defaultClearTimeout; | |
} | |
} ()) | |
function runTimeout(fun) { | |
if (cachedSetTimeout === setTimeout) { | |
//normal enviroments in sane situations | |
return setTimeout(fun, 0); | |
} | |
// if setTimeout wasn't available but was latter defined | |
if ((cachedSetTimeout === defaultSetTimout || !cachedSetTimeout) && setTimeout) { | |
cachedSetTimeout = setTimeout; | |
return setTimeout(fun, 0); | |
} | |
try { | |
// when when somebody has screwed with setTimeout but no I.E. maddness | |
return cachedSetTimeout(fun, 0); | |
} catch(e){ | |
try { | |
// When we are in I.E. but the script has been evaled so I.E. doesn't trust the global object when called normally | |
return cachedSetTimeout.call(null, fun, 0); | |
} catch(e){ | |
// same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error | |
return cachedSetTimeout.call(this, fun, 0); | |
} | |
} | |
} | |
function runClearTimeout(marker) { | |
if (cachedClearTimeout === clearTimeout) { | |
//normal enviroments in sane situations | |
return clearTimeout(marker); | |
} | |
// if clearTimeout wasn't available but was latter defined | |
if ((cachedClearTimeout === defaultClearTimeout || !cachedClearTimeout) && clearTimeout) { | |
cachedClearTimeout = clearTimeout; | |
return clearTimeout(marker); | |
} | |
try { | |
// when when somebody has screwed with setTimeout but no I.E. maddness | |
return cachedClearTimeout(marker); | |
} catch (e){ | |
try { | |
// When we are in I.E. but the script has been evaled so I.E. doesn't trust the global object when called normally | |
return cachedClearTimeout.call(null, marker); | |
} catch (e){ | |
// same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error. | |
// Some versions of I.E. have different rules for clearTimeout vs setTimeout | |
return cachedClearTimeout.call(this, marker); | |
} | |
} | |
} | |
var queue = []; | |
var draining = false; | |
var currentQueue; | |
var queueIndex = -1; | |
function cleanUpNextTick() { | |
if (!draining || !currentQueue) { | |
return; | |
} | |
draining = false; | |
if (currentQueue.length) { | |
queue = currentQueue.concat(queue); | |
} else { | |
queueIndex = -1; | |
} | |
if (queue.length) { | |
drainQueue(); | |
} | |
} | |
function drainQueue() { | |
if (draining) { | |
return; | |
} | |
var timeout = runTimeout(cleanUpNextTick); | |
draining = true; | |
var len = queue.length; | |
while(len) { | |
currentQueue = queue; | |
queue = []; | |
while (++queueIndex < len) { | |
if (currentQueue) { | |
currentQueue[queueIndex].run(); | |
} | |
} | |
queueIndex = -1; | |
len = queue.length; | |
} | |
currentQueue = null; | |
draining = false; | |
runClearTimeout(timeout); | |
} | |
process.nextTick = function (fun) { | |
var args = new Array(arguments.length - 1); | |
if (arguments.length > 1) { | |
for (var i = 1; i < arguments.length; i++) { | |
args[i - 1] = arguments[i]; | |
} | |
} | |
queue.push(new Item(fun, args)); | |
if (queue.length === 1 && !draining) { | |
runTimeout(drainQueue); | |
} | |
}; | |
// v8 likes predictible objects | |
function Item(fun, array) { | |
this.fun = fun; | |
this.array = array; | |
} | |
Item.prototype.run = function () { | |
this.fun.apply(null, this.array); | |
}; | |
process.title = 'browser'; | |
process.browser = true; | |
process.env = {}; | |
process.argv = []; | |
process.version = ''; // empty string to avoid regexp issues | |
process.versions = {}; | |
function noop() {} | |
process.on = noop; | |
process.addListener = noop; | |
process.once = noop; | |
process.off = noop; | |
process.removeListener = noop; | |
process.removeAllListeners = noop; | |
process.emit = noop; | |
process.binding = function (name) { | |
throw new Error('process.binding is not supported'); | |
}; | |
process.cwd = function () { return '/' }; | |
process.chdir = function (dir) { | |
throw new Error('process.chdir is not supported'); | |
}; | |
process.umask = function() { return 0; }; | |
/***/ }, | |
/* 2 */ | |
/***/ function(module, exports) { | |
var g; | |
// This works in non-strict mode | |
g = (function() { return this; })(); | |
try { | |
// This works if eval is allowed (see CSP) | |
g = g || Function("return this")() || (1,eval)("this"); | |
} catch(e) { | |
// This works if the window reference is available | |
if(typeof window === "object") | |
g = window; | |
} | |
// g can still be undefined, but nothing to do about it... | |
// We return undefined, instead of nothing here, so it's | |
// easier to handle this case. if(!global) { ...} | |
module.exports = g; | |
/***/ }, | |
/* 3 */ | |
/***/ function(module, exports, __webpack_require__) { | |
"use strict"; | |
exports.byteLength = byteLength | |
exports.toByteArray = toByteArray | |
exports.fromByteArray = fromByteArray | |
var lookup = [] | |
var revLookup = [] | |
var Arr = typeof Uint8Array !== 'undefined' ? Uint8Array : Array | |
var code = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/' | |
for (var i = 0, len = code.length; i < len; ++i) { | |
lookup[i] = code[i] | |
revLookup[code.charCodeAt(i)] = i | |
} | |
revLookup['-'.charCodeAt(0)] = 62 | |
revLookup['_'.charCodeAt(0)] = 63 | |
function placeHoldersCount (b64) { | |
var len = b64.length | |
if (len % 4 > 0) { | |
throw new Error('Invalid string. Length must be a multiple of 4') | |
} | |
// the number of equal signs (place holders) | |
// if there are two placeholders, than the two characters before it | |
// represent one byte | |
// if there is only one, then the three characters before it represent 2 bytes | |
// this is just a cheap hack to not do indexOf twice | |
return b64[len - 2] === '=' ? 2 : b64[len - 1] === '=' ? 1 : 0 | |
} | |
function byteLength (b64) { | |
// base64 is 4/3 + up to two characters of the original data | |
return b64.length * 3 / 4 - placeHoldersCount(b64) | |
} | |
function toByteArray (b64) { | |
var i, j, l, tmp, placeHolders, arr | |
var len = b64.length | |
placeHolders = placeHoldersCount(b64) | |
arr = new Arr(len * 3 / 4 - placeHolders) | |
// if there are placeholders, only get up to the last complete 4 chars | |
l = placeHolders > 0 ? len - 4 : len | |
var L = 0 | |
for (i = 0, j = 0; i < l; i += 4, j += 3) { | |
tmp = (revLookup[b64.charCodeAt(i)] << 18) | (revLookup[b64.charCodeAt(i + 1)] << 12) | (revLookup[b64.charCodeAt(i + 2)] << 6) | revLookup[b64.charCodeAt(i + 3)] | |
arr[L++] = (tmp >> 16) & 0xFF | |
arr[L++] = (tmp >> 8) & 0xFF | |
arr[L++] = tmp & 0xFF | |
} | |
if (placeHolders === 2) { | |
tmp = (revLookup[b64.charCodeAt(i)] << 2) | (revLookup[b64.charCodeAt(i + 1)] >> 4) | |
arr[L++] = tmp & 0xFF | |
} else if (placeHolders === 1) { | |
tmp = (revLookup[b64.charCodeAt(i)] << 10) | (revLookup[b64.charCodeAt(i + 1)] << 4) | (revLookup[b64.charCodeAt(i + 2)] >> 2) | |
arr[L++] = (tmp >> 8) & 0xFF | |
arr[L++] = 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) + (uint8[i + 1] << 8) + (uint8[i + 2]) | |
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 output = '' | |
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] | |
output += lookup[tmp >> 2] | |
output += lookup[(tmp << 4) & 0x3F] | |
output += '==' | |
} else if (extraBytes === 2) { | |
tmp = (uint8[len - 2] << 8) + (uint8[len - 1]) | |
output += lookup[tmp >> 10] | |
output += lookup[(tmp >> 4) & 0x3F] | |
output += lookup[(tmp << 2) & 0x3F] | |
output += '=' | |
} | |
parts.push(output) | |
return parts.join('') | |
} | |
/***/ }, | |
/* 4 */ | |
/***/ function(module, exports) { | |
exports.read = function (buffer, offset, isLE, mLen, nBytes) { | |
var e, m | |
var eLen = nBytes * 8 - mLen - 1 | |
var eMax = (1 << eLen) - 1 | |
var eBias = eMax >> 1 | |
var nBits = -7 | |
var i = isLE ? (nBytes - 1) : 0 | |
var d = isLE ? -1 : 1 | |
var s = buffer[offset + i] | |
i += d | |
e = s & ((1 << (-nBits)) - 1) | |
s >>= (-nBits) | |
nBits += eLen | |
for (; nBits > 0; e = e * 256 + buffer[offset + i], i += d, nBits -= 8) {} | |
m = e & ((1 << (-nBits)) - 1) | |
e >>= (-nBits) | |
nBits += mLen | |
for (; nBits > 0; m = m * 256 + buffer[offset + i], i += d, nBits -= 8) {} | |
if (e === 0) { | |
e = 1 - eBias | |
} else if (e === eMax) { | |
return m ? NaN : ((s ? -1 : 1) * Infinity) | |
} else { | |
m = m + Math.pow(2, mLen) | |
e = e - eBias | |
} | |
return (s ? -1 : 1) * m * Math.pow(2, e - mLen) | |
} | |
exports.write = function (buffer, value, offset, isLE, mLen, nBytes) { | |
var e, m, c | |
var eLen = nBytes * 8 - mLen - 1 | |
var eMax = (1 << eLen) - 1 | |
var eBias = eMax >> 1 | |
var rt = (mLen === 23 ? Math.pow(2, -24) - Math.pow(2, -77) : 0) | |
var i = isLE ? 0 : (nBytes - 1) | |
var d = isLE ? 1 : -1 | |
var s = value < 0 || (value === 0 && 1 / value < 0) ? 1 : 0 | |
value = Math.abs(value) | |
if (isNaN(value) || value === Infinity) { | |
m = isNaN(value) ? 1 : 0 | |
e = eMax | |
} else { | |
e = Math.floor(Math.log(value) / Math.LN2) | |
if (value * (c = Math.pow(2, -e)) < 1) { | |
e-- | |
c *= 2 | |
} | |
if (e + eBias >= 1) { | |
value += rt / c | |
} else { | |
value += rt * Math.pow(2, 1 - eBias) | |
} | |
if (value * c >= 2) { | |
e++ | |
c /= 2 | |
} | |
if (e + eBias >= eMax) { | |
m = 0 | |
e = eMax | |
} else if (e + eBias >= 1) { | |
m = (value * c - 1) * Math.pow(2, mLen) | |
e = e + eBias | |
} else { | |
m = value * Math.pow(2, eBias - 1) * Math.pow(2, mLen) | |
e = 0 | |
} | |
} | |
for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) {} | |
e = (e << mLen) | m | |
eLen += mLen | |
for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) {} | |
buffer[offset + i - d] |= s * 128 | |
} | |
/***/ }, | |
/* 5 */ | |
/***/ function(module, exports) { | |
var toString = {}.toString; | |
module.exports = Array.isArray || function (arr) { | |
return toString.call(arr) == '[object Array]'; | |
}; | |
/***/ }, | |
/* 6 */ | |
/***/ function(module, exports, __webpack_require__) { | |
/* WEBPACK VAR INJECTION */(function(process, Buffer) {if (process.browser) { | |
module.exports = function (string) { | |
return btoa(string); | |
}; | |
} else { | |
module.exports = function (string) { | |
return Buffer.from(string, 'binary').toString('base64'); | |
}; | |
} | |
/* WEBPACK VAR INJECTION */}.call(exports, __webpack_require__(1), __webpack_require__(0).Buffer)) | |
/***/ } | |
/******/ ]); |
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