feross

buffer

 * The buffer module from node.js, for the browser.

 * @author   Feross Aboukhadijeh <https://feross.org>

  (typeof Symbol === 'function' && typeof Symbol.for === 'function')

    ? Symbol.for('nodejs.util.inspect.custom')

 *   === true    Use Uint8Array implementation (fastest)

 *   === false   Print warning and recommend using `buffer` v4.x which has an Object

 *               implementation (most compatible, even IE6)

 * Browsers that support typed arrays are IE 10+, Firefox 4+, Chrome 7+, Safari 5.1+,

 * We report that the browser does not support typed arrays if the are not subclassable

 * using __proto__. Firefox 4-29 lacks support for adding new properties to `Uint8Array`

 * (See: https://bugzilla.mozilla.org/show_bug.cgi?id=695438). IE 10 lacks support

 * for __proto__ and has a buggy typed array implementation.

Buffer.TYPED_ARRAY_SUPPORT = typedArraySupport()

if (!Buffer.TYPED_ARRAY_SUPPORT && typeof console !== 'undefined' &&

    typeof console.error === 'function') {

    'This browser lacks typed array (Uint8Array) support which is required by ' +

    '`buffer` v5.x. Use `buffer` v4.x if you require old browser support.'

  // Can typed array instances can be augmented?

    var proto = { foo: function () { return 42 } }

    Object.setPrototypeOf(proto, Uint8Array.prototype)

Object.defineProperty(Buffer.prototype, 'parent', {

    if (!Buffer.isBuffer(this)) return undefined

Object.defineProperty(Buffer.prototype, 'offset', {

    throw new RangeError('The value "' + length + '" is invalid for option "size"')

  // Return an augmented `Uint8Array` instance

  Object.setPrototypeOf(buf, Buffer.prototype)

 * 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

 * The `Uint8Array` prototype remains unmodified.

function Buffer (arg, encodingOrOffset, length) {

    var bytesPerSequence = (firstByte > 0xEF) ? 4

    var bytesPerSequence = (firstByte > 0xEF)

      var secondByte, thirdByte, fourthByte, tempCodePoint

          if ((secondByte & 0xC0) === 0x80) {

            tempCodePoint = (firstByte & 0x1F) << 0x6 | (secondByte & 0x3F)

          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80) {

            tempCodePoint = (firstByte & 0xF) << 0xC | (secondByte & 0x3F) << 0x6 | (thirdByte & 0x3F)

            if (tempCodePoint > 0x7FF && (tempCodePoint < 0xD800 || tempCodePoint > 0xDFFF)) {

          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) {

      // we did not generate a valid codePoint so insert a

      // replacement char (U+FFFD) and advance only 1 byte

      // encode to utf16 (surrogate pair dance)

      res.push(codePoint >>> 10 & 0x3FF | 0xD800)

      codePoint = 0xDC00 | codePoint & 0x3FF

// Based on http://stackoverflow.com/a/22747272/680742, the browser with

// the lowest limit is Chrome, with 0x10000 args.

function decodeCodePointsArray (codePoints) {

    return String.fromCharCode.apply(String, codePoints) // avoid extra slice()

  // Decode in chunks to avoid "call stack size exceeded".

      codePoints.slice(i, i += MAX_ARGUMENTS_LENGTH)

    ret += String.fromCharCode(buf[i] & 0x7F)

  "description": "Node.js Buffer API, for the browser",

    "url": "https://github.com/feross/buffer/issues"

    "Romain Beauxis <toots@rastageeks.org>",

  "homepage": "https://github.com/feross/buffer",

    "url": "git://github.com/feross/buffer.git"

    "perf": "browserify --debug perf/bracket-notation.js > perf/bundle.js && open perf/index.html",

    "perf-node": "node perf/bracket-notation.js && node perf/concat.js && node perf/copy-big.js && node perf/copy.js && node perf/new-big.js && node perf/new.js && node perf/readDoubleBE.js && node perf/readFloatBE.js && node perf/readUInt32LE.js && node perf/slice.js && node perf/writeFloatBE.js",

    "size": "browserify -r ./ | uglifyjs -c -m | gzip | wc -c",

    "test": "standard && node ./bin/test.js",

    "test-browser-es5": "airtap -- test/*.js",

    "test-browser-es5-local": "airtap --local -- test/*.js",

    "test-browser-es6": "airtap -- test/*.js test/node/*.js",

    "test-browser-es6-local": "airtap --local -- test/*.js test/node/*.js",

    "test-node": "tape test/*.js test/node/*.js",

    "update-authors": "./bin/update-authors.sh"

      "url": "https://github.com/sponsors/feross"

      "url": "https://www.patreon.com/feross"

      "url": "https://feross.org/support"

		@@ -950,6 +950,9 @@ /*!
		var codePoint = null
		var bytesPerSequence = (firstByte > 0xEF) ? 4
		: (firstByte > 0xDF) ? 3
		: (firstByte > 0xBF) ? 2
		: 1
		var bytesPerSequence = (firstByte > 0xEF)
		? 4
		: (firstByte > 0xDF)
		? 3
		: (firstByte > 0xBF)
		? 2
		: 1

		@@ -956,0 +959,0 @@ if (i + bytesPerSequence <= end) {

		{
		"name": "buffer",
		"description": "Node.js Buffer API, for the browser",
		"version": "5.6.0",
		"version": "5.6.1",
		"author": {
		"name": "Feross Aboukhadijeh",
		"email": "feross@feross.org",
		"url": "http://feross.org"
		"url": "https://feross.org"
		},
		@@ -18,18 +18,18 @@ "bugs": {
		"dependencies": {
		"base64-js": "^1.0.2",
		"ieee754": "^1.1.4"
		"base64-js": "^1.3.1",
		"ieee754": "^1.1.13"
		},
		"devDependencies": {
		"airtap": "^3.0.0",
		"benchmark": "^2.0.0",
		"browserify": "^16.1.0",
		"benchmark": "^2.1.4",
		"browserify": "^17.0.0",
		"concat-stream": "^2.0.0",
		"hyperquest": "^2.0.0",
		"is-buffer": "^2.0.0",
		"is-nan": "^1.0.1",
		"split": "^1.0.0",
		"hyperquest": "^2.1.3",
		"is-buffer": "^2.0.4",
		"is-nan": "^1.3.0",
		"split": "^1.0.1",
		"standard": "*",
		"tape": "^4.0.0",
		"through2": "^3.0.1",
		"uglify-js": "^3.4.5"
		"tape": "^5.0.1",
		"through2": "^4.0.2",
		"uglify-js": "^3.11.3"
		},
		@@ -82,3 +82,17 @@ "homepage": "https://github.com/feross/buffer",
		]
		}
		},
		"funding": [
		{
		"type": "github",
		"url": "https://github.com/sponsors/feross"
		},
		{
		"type": "patreon",
		"url": "https://www.patreon.com/feross"
		},
		{
		"type": "consulting",
		"url": "https://feross.org/support"
		}
		]
		}

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