diff --git a/dist/image-sequencer.js b/dist/image-sequencer.js index 7d1a978a..863cddff 100755 --- a/dist/image-sequencer.js +++ b/dist/image-sequencer.js @@ -1,4 +1,365 @@ (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 +// +// Permission is hereby granted, free of charge, to any person obtaining a copy +// of this software and associated documentation files (the 'Software'), to +// deal in the Software without restriction, including without limitation the +// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or +// sell copies of the Software, and to permit persons to whom the Software is +// furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +// ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION +// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + +// when used in node, this will actually load the util module we depend on +// versus loading the builtin util module as happens otherwise +// this is a bug in node module loading as far as I am concerned +var util = require('util/'); + +var pSlice = Array.prototype.slice; +var hasOwn = Object.prototype.hasOwnProperty; + +// 1. The assert module provides functions that throw +// AssertionError's when particular conditions are not met. The +// assert module must conform to the following interface. + +var assert = module.exports = ok; + +// 2. The AssertionError is defined in assert. +// new assert.AssertionError({ message: message, +// actual: actual, +// expected: expected }) + +assert.AssertionError = function AssertionError(options) { + this.name = 'AssertionError'; + this.actual = options.actual; + this.expected = options.expected; + this.operator = options.operator; + if (options.message) { + this.message = options.message; + this.generatedMessage = false; + } else { + this.message = getMessage(this); + this.generatedMessage = true; + } + var stackStartFunction = options.stackStartFunction || fail; + + if (Error.captureStackTrace) { + Error.captureStackTrace(this, stackStartFunction); + } + else { + // non v8 browsers so we can have a stacktrace + var err = new Error(); + if (err.stack) { + var out = err.stack; + + // try to strip useless frames + var fn_name = stackStartFunction.name; + var idx = out.indexOf('\n' + fn_name); + if (idx >= 0) { + // once we have located the function frame + // we need to strip out everything before it (and its line) + var next_line = out.indexOf('\n', idx + 1); + out = out.substring(next_line + 1); + } + + this.stack = out; + } + } +}; + +// assert.AssertionError instanceof Error +util.inherits(assert.AssertionError, Error); + +function replacer(key, value) { + if (util.isUndefined(value)) { + return '' + value; + } + if (util.isNumber(value) && !isFinite(value)) { + return value.toString(); + } + if (util.isFunction(value) || util.isRegExp(value)) { + return value.toString(); + } + return value; +} + +function truncate(s, n) { + if (util.isString(s)) { + return s.length < n ? s : s.slice(0, n); + } else { + return s; + } +} + +function getMessage(self) { + return truncate(JSON.stringify(self.actual, replacer), 128) + ' ' + + self.operator + ' ' + + truncate(JSON.stringify(self.expected, replacer), 128); +} + +// At present only the three keys mentioned above are used and +// understood by the spec. Implementations or sub modules can pass +// other keys to the AssertionError's constructor - they will be +// ignored. + +// 3. All of the following functions must throw an AssertionError +// when a corresponding condition is not met, with a message that +// may be undefined if not provided. All assertion methods provide +// both the actual and expected values to the assertion error for +// display purposes. + +function fail(actual, expected, message, operator, stackStartFunction) { + throw new assert.AssertionError({ + message: message, + actual: actual, + expected: expected, + operator: operator, + stackStartFunction: stackStartFunction + }); +} + +// EXTENSION! allows for well behaved errors defined elsewhere. +assert.fail = fail; + +// 4. Pure assertion tests whether a value is truthy, as determined +// by !!guard. +// assert.ok(guard, message_opt); +// This statement is equivalent to assert.equal(true, !!guard, +// message_opt);. To test strictly for the value true, use +// assert.strictEqual(true, guard, message_opt);. + +function ok(value, message) { + if (!value) fail(value, true, message, '==', assert.ok); +} +assert.ok = ok; + +// 5. The equality assertion tests shallow, coercive equality with +// ==. +// assert.equal(actual, expected, message_opt); + +assert.equal = function equal(actual, expected, message) { + if (actual != expected) fail(actual, expected, message, '==', assert.equal); +}; + +// 6. The non-equality assertion tests for whether two objects are not equal +// with != assert.notEqual(actual, expected, message_opt); + +assert.notEqual = function notEqual(actual, expected, message) { + if (actual == expected) { + fail(actual, expected, message, '!=', assert.notEqual); + } +}; + +// 7. The equivalence assertion tests a deep equality relation. +// assert.deepEqual(actual, expected, message_opt); + +assert.deepEqual = function deepEqual(actual, expected, message) { + if (!_deepEqual(actual, expected)) { + fail(actual, expected, message, 'deepEqual', assert.deepEqual); + } +}; + +function _deepEqual(actual, expected) { + // 7.1. All identical values are equivalent, as determined by ===. + if (actual === expected) { + return true; + + } else if (util.isBuffer(actual) && util.isBuffer(expected)) { + if (actual.length != expected.length) return false; + + for (var i = 0; i < actual.length; i++) { + if (actual[i] !== expected[i]) return false; + } + + return true; + + // 7.2. If the expected value is a Date object, the actual value is + // equivalent if it is also a Date object that refers to the same time. + } else if (util.isDate(actual) && util.isDate(expected)) { + return actual.getTime() === expected.getTime(); + + // 7.3 If the expected value is a RegExp object, the actual value is + // equivalent if it is also a RegExp object with the same source and + // properties (`global`, `multiline`, `lastIndex`, `ignoreCase`). + } else if (util.isRegExp(actual) && util.isRegExp(expected)) { + return actual.source === expected.source && + actual.global === expected.global && + actual.multiline === expected.multiline && + actual.lastIndex === expected.lastIndex && + actual.ignoreCase === expected.ignoreCase; + + // 7.4. Other pairs that do not both pass typeof value == 'object', + // equivalence is determined by ==. + } else if (!util.isObject(actual) && !util.isObject(expected)) { + return actual == expected; + + // 7.5 For all other Object pairs, including Array objects, equivalence is + // determined by having the same number of owned properties (as verified + // with Object.prototype.hasOwnProperty.call), the same set of keys + // (although not necessarily the same order), equivalent values for every + // corresponding key, and an identical 'prototype' property. Note: this + // accounts for both named and indexed properties on Arrays. + } else { + return objEquiv(actual, expected); + } +} + +function isArguments(object) { + return Object.prototype.toString.call(object) == '[object Arguments]'; +} + +function objEquiv(a, b) { + if (util.isNullOrUndefined(a) || util.isNullOrUndefined(b)) + return false; + // an identical 'prototype' property. + if (a.prototype !== b.prototype) return false; + // if one is a primitive, the other must be same + if (util.isPrimitive(a) || util.isPrimitive(b)) { + return a === b; + } + var aIsArgs = isArguments(a), + bIsArgs = isArguments(b); + if ((aIsArgs && !bIsArgs) || (!aIsArgs && bIsArgs)) + return false; + if (aIsArgs) { + a = pSlice.call(a); + b = pSlice.call(b); + return _deepEqual(a, b); + } + var ka = objectKeys(a), + kb = objectKeys(b), + key, i; + // having the same number of owned properties (keys incorporates + // hasOwnProperty) + if (ka.length != kb.length) + return false; + //the same set of keys (although not necessarily the same order), + ka.sort(); + kb.sort(); + //~~~cheap key test + for (i = ka.length - 1; i >= 0; i--) { + if (ka[i] != kb[i]) + return false; + } + //equivalent values for every corresponding key, and + //~~~possibly expensive deep test + for (i = ka.length - 1; i >= 0; i--) { + key = ka[i]; + if (!_deepEqual(a[key], b[key])) return false; + } + return true; +} + +// 8. The non-equivalence assertion tests for any deep inequality. +// assert.notDeepEqual(actual, expected, message_opt); + +assert.notDeepEqual = function notDeepEqual(actual, expected, message) { + if (_deepEqual(actual, expected)) { + fail(actual, expected, message, 'notDeepEqual', assert.notDeepEqual); + } +}; + +// 9. The strict equality assertion tests strict equality, as determined by ===. +// assert.strictEqual(actual, expected, message_opt); + +assert.strictEqual = function strictEqual(actual, expected, message) { + if (actual !== expected) { + fail(actual, expected, message, '===', assert.strictEqual); + } +}; + +// 10. The strict non-equality assertion tests for strict inequality, as +// determined by !==. assert.notStrictEqual(actual, expected, message_opt); + +assert.notStrictEqual = function notStrictEqual(actual, expected, message) { + if (actual === expected) { + fail(actual, expected, message, '!==', assert.notStrictEqual); + } +}; + +function expectedException(actual, expected) { + if (!actual || !expected) { + return false; + } + + if (Object.prototype.toString.call(expected) == '[object RegExp]') { + return expected.test(actual); + } else if (actual instanceof expected) { + return true; + } else if (expected.call({}, actual) === true) { + return true; + } + + return false; +} + +function _throws(shouldThrow, block, expected, message) { + var actual; + + if (util.isString(expected)) { + message = expected; + expected = null; + } + + try { + block(); + } catch (e) { + actual = e; + } + + message = (expected && expected.name ? ' (' + expected.name + ').' : '.') + + (message ? ' ' + message : '.'); + + if (shouldThrow && !actual) { + fail(actual, expected, 'Missing expected exception' + message); + } + + if (!shouldThrow && expectedException(actual, expected)) { + fail(actual, expected, 'Got unwanted exception' + message); + } + + if ((shouldThrow && actual && expected && + !expectedException(actual, expected)) || (!shouldThrow && actual)) { + throw actual; + } +} + +// 11. Expected to throw an error: +// assert.throws(block, Error_opt, message_opt); + +assert.throws = function(block, /*optional*/error, /*optional*/message) { + _throws.apply(this, [true].concat(pSlice.call(arguments))); +}; + +// EXTENSION! This is annoying to write outside this module. +assert.doesNotThrow = function(block, /*optional*/message) { + _throws.apply(this, [false].concat(pSlice.call(arguments))); +}; + +assert.ifError = function(err) { if (err) {throw err;}}; + +var objectKeys = Object.keys || function (obj) { + var keys = []; + for (var key in obj) { + if (hasOwn.call(obj, key)) keys.push(key); + } + return keys; +}; + +},{"util/":119}],2:[function(require,module,exports){ 'use strict' exports.byteLength = byteLength @@ -34,22 +395,22 @@ function placeHoldersCount (b64) { function byteLength (b64) { // base64 is 4/3 + up to two characters of the original data - return (b64.length * 3 / 4) - placeHoldersCount(b64) + return b64.length * 3 / 4 - placeHoldersCount(b64) } function toByteArray (b64) { - var i, l, tmp, placeHolders, arr + var i, j, l, tmp, placeHolders, arr var len = b64.length placeHolders = placeHoldersCount(b64) - arr = new Arr((len * 3 / 4) - placeHolders) + 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; i < l; i += 4) { + 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 @@ -114,9 +475,9 @@ function fromByteArray (uint8) { return parts.join('') } -},{}],2:[function(require,module,exports){ - },{}],3:[function(require,module,exports){ + +},{}],4:[function(require,module,exports){ (function (process,Buffer){ var msg = require('pako/lib/zlib/messages'); var zstream = require('pako/lib/zlib/zstream'); @@ -356,7 +717,7 @@ Zlib.prototype._error = function(status) { exports.Zlib = Zlib; }).call(this,require('_process'),require("buffer").Buffer) -},{"_process":94,"buffer":5,"pako/lib/zlib/constants":62,"pako/lib/zlib/deflate.js":64,"pako/lib/zlib/inflate.js":66,"pako/lib/zlib/messages":68,"pako/lib/zlib/zstream":70}],4:[function(require,module,exports){ +},{"_process":94,"buffer":7,"pako/lib/zlib/constants":62,"pako/lib/zlib/deflate.js":64,"pako/lib/zlib/inflate.js":66,"pako/lib/zlib/messages":68,"pako/lib/zlib/zstream":70}],5:[function(require,module,exports){ (function (process,Buffer){ // Copyright Joyent, Inc. and other Node contributors. // @@ -970,7 +1331,10 @@ util.inherits(InflateRaw, Zlib); util.inherits(Unzip, Zlib); }).call(this,require('_process'),require("buffer").Buffer) -},{"./binding":3,"_process":94,"_stream_transform":44,"assert":32,"buffer":5,"util":129}],5:[function(require,module,exports){ +},{"./binding":4,"_process":94,"_stream_transform":105,"assert":1,"buffer":7,"util":119}],6:[function(require,module,exports){ +arguments[4][3][0].apply(exports,arguments) +},{"dup":3}],7:[function(require,module,exports){ +(function (global){ /*! * The buffer module from node.js, for the browser. * @@ -983,57 +1347,80 @@ util.inherits(Unzip, Zlib); var base64 = require('base64-js') var ieee754 = require('ieee754') +var isArray = require('isarray') exports.Buffer = Buffer exports.SlowBuffer = SlowBuffer exports.INSPECT_MAX_BYTES = 50 -var K_MAX_LENGTH = 0x7fffffff -exports.kMaxLength = K_MAX_LENGTH - /** * If `Buffer.TYPED_ARRAY_SUPPORT`: * === true Use Uint8Array implementation (fastest) - * === false Print warning and recommend using `buffer` v4.x which has an Object - * implementation (most compatible, even IE6) + * === 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+. * - * 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() + * 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. -if (!Buffer.TYPED_ARRAY_SUPPORT && typeof console !== 'undefined' && - typeof console.error === 'function') { - console.error( - 'This browser lacks typed array (Uint8Array) support which is required by ' + - '`buffer` v5.x. Use `buffer` v4.x if you require old browser support.' - ) -} + * 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 () { - // Can typed array instances can be augmented? try { var arr = new Uint8Array(1) arr.__proto__ = {__proto__: Uint8Array.prototype, foo: function () { return 42 }} - return arr.foo() === 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 createBuffer (length) { - if (length > K_MAX_LENGTH) { +function kMaxLength () { + return Buffer.TYPED_ARRAY_SUPPORT + ? 0x7fffffff + : 0x3fffffff +} + +function createBuffer (that, length) { + if (kMaxLength() < length) { throw new RangeError('Invalid typed array length') } - // Return an augmented `Uint8Array` instance - var buf = new Uint8Array(length) - buf.__proto__ = Buffer.prototype - return buf + 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 } /** @@ -1047,6 +1434,10 @@ function createBuffer (length) { */ 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') { @@ -1054,38 +1445,33 @@ function Buffer (arg, encodingOrOffset, length) { 'If encoding is specified then the first argument must be a string' ) } - return allocUnsafe(arg) + return allocUnsafe(this, arg) } - return from(arg, encodingOrOffset, length) -} - -// Fix subarray() in ES2016. See: https://github.com/feross/buffer/pull/97 -if (typeof Symbol !== 'undefined' && Symbol.species && - Buffer[Symbol.species] === Buffer) { - Object.defineProperty(Buffer, Symbol.species, { - value: null, - configurable: true, - enumerable: false, - writable: false - }) + return from(this, arg, encodingOrOffset, length) } Buffer.poolSize = 8192 // not used by this implementation -function from (value, encodingOrOffset, length) { +// 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 (isArrayBuffer(value)) { - return fromArrayBuffer(value, encodingOrOffset, length) + if (typeof ArrayBuffer !== 'undefined' && value instanceof ArrayBuffer) { + return fromArrayBuffer(that, value, encodingOrOffset, length) } if (typeof value === 'string') { - return fromString(value, encodingOrOffset) + return fromString(that, value, encodingOrOffset) } - return fromObject(value) + return fromObject(that, value) } /** @@ -1097,13 +1483,21 @@ function from (value, encodingOrOffset, length) { * Buffer.from(arrayBuffer[, byteOffset[, length]]) **/ Buffer.from = function (value, encodingOrOffset, length) { - return from(value, encodingOrOffset, length) + return from(null, value, encodingOrOffset, length) } -// Note: Change prototype *after* Buffer.from is defined to workaround Chrome bug: -// https://github.com/feross/buffer/pull/148 -Buffer.prototype.__proto__ = Uint8Array.prototype -Buffer.__proto__ = Uint8Array +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') { @@ -1113,20 +1507,20 @@ function assertSize (size) { } } -function alloc (size, fill, encoding) { +function alloc (that, size, fill, encoding) { assertSize(size) if (size <= 0) { - return createBuffer(size) + 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(size).fill(fill, encoding) - : createBuffer(size).fill(fill) + ? createBuffer(that, size).fill(fill, encoding) + : createBuffer(that, size).fill(fill) } - return createBuffer(size) + return createBuffer(that, size) } /** @@ -1134,28 +1528,34 @@ function alloc (size, fill, encoding) { * alloc(size[, fill[, encoding]]) **/ Buffer.alloc = function (size, fill, encoding) { - return alloc(size, fill, encoding) + return alloc(null, size, fill, encoding) } -function allocUnsafe (size) { +function allocUnsafe (that, size) { assertSize(size) - return createBuffer(size < 0 ? 0 : checked(size) | 0) + 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(size) + return allocUnsafe(null, size) } /** * Equivalent to SlowBuffer(num), by default creates a non-zero-filled Buffer instance. */ Buffer.allocUnsafeSlow = function (size) { - return allocUnsafe(size) + return allocUnsafe(null, size) } -function fromString (string, encoding) { +function fromString (that, string, encoding) { if (typeof encoding !== 'string' || encoding === '') { encoding = 'utf8' } @@ -1165,30 +1565,32 @@ function fromString (string, encoding) { } var length = byteLength(string, encoding) | 0 - var buf = createBuffer(length) + that = createBuffer(that, length) - var actual = buf.write(string, encoding) + 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') - buf = buf.slice(0, actual) + that = that.slice(0, actual) } - return buf + return that } -function fromArrayLike (array) { +function fromArrayLike (that, array) { var length = array.length < 0 ? 0 : checked(array.length) | 0 - var buf = createBuffer(length) + that = createBuffer(that, length) for (var i = 0; i < length; i += 1) { - buf[i] = array[i] & 255 + that[i] = array[i] & 255 } - return buf + return that } -function fromArrayBuffer (array, byteOffset, length) { +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') } @@ -1197,43 +1599,49 @@ function fromArrayBuffer (array, byteOffset, length) { throw new RangeError('\'length\' is out of bounds') } - var buf if (byteOffset === undefined && length === undefined) { - buf = new Uint8Array(array) + array = new Uint8Array(array) } else if (length === undefined) { - buf = new Uint8Array(array, byteOffset) + array = new Uint8Array(array, byteOffset) } else { - buf = new Uint8Array(array, byteOffset, length) + array = new Uint8Array(array, byteOffset, length) } - // Return an augmented `Uint8Array` instance - buf.__proto__ = Buffer.prototype - return buf + 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 (obj) { +function fromObject (that, obj) { if (Buffer.isBuffer(obj)) { var len = checked(obj.length) | 0 - var buf = createBuffer(len) + that = createBuffer(that, len) - if (buf.length === 0) { - return buf + if (that.length === 0) { + return that } - obj.copy(buf, 0, 0, len) - return buf + obj.copy(that, 0, 0, len) + return that } if (obj) { - if (isArrayBufferView(obj) || 'length' in obj) { - if (typeof obj.length !== 'number' || numberIsNaN(obj.length)) { - return createBuffer(0) + 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(obj) + return fromArrayLike(that, obj) } - if (obj.type === 'Buffer' && Array.isArray(obj.data)) { - return fromArrayLike(obj.data) + if (obj.type === 'Buffer' && isArray(obj.data)) { + return fromArrayLike(that, obj.data) } } @@ -1241,11 +1649,11 @@ function fromObject (obj) { } function checked (length) { - // Note: cannot use `length < K_MAX_LENGTH` here because that fails when + // Note: cannot use `length < kMaxLength()` here because that fails when // length is NaN (which is otherwise coerced to zero.) - if (length >= K_MAX_LENGTH) { + if (length >= kMaxLength()) { throw new RangeError('Attempt to allocate Buffer larger than maximum ' + - 'size: 0x' + K_MAX_LENGTH.toString(16) + ' bytes') + 'size: 0x' + kMaxLength().toString(16) + ' bytes') } return length | 0 } @@ -1258,7 +1666,7 @@ function SlowBuffer (length) { } Buffer.isBuffer = function isBuffer (b) { - return b != null && b._isBuffer === true + return !!(b != null && b._isBuffer) } Buffer.compare = function compare (a, b) { @@ -1304,7 +1712,7 @@ Buffer.isEncoding = function isEncoding (encoding) { } Buffer.concat = function concat (list, length) { - if (!Array.isArray(list)) { + if (!isArray(list)) { throw new TypeError('"list" argument must be an Array of Buffers') } @@ -1337,7 +1745,8 @@ function byteLength (string, encoding) { if (Buffer.isBuffer(string)) { return string.length } - if (isArrayBufferView(string) || isArrayBuffer(string)) { + if (typeof ArrayBuffer !== 'undefined' && typeof ArrayBuffer.isView === 'function' && + (ArrayBuffer.isView(string) || string instanceof ArrayBuffer)) { return string.byteLength } if (typeof string !== 'string') { @@ -1447,12 +1856,8 @@ function slowToString (encoding, start, end) { } } -// This property is used by `Buffer.isBuffer` (and the `is-buffer` npm package) -// to detect a Buffer instance. It's not possible to use `instanceof Buffer` -// reliably in a browserify context because there could be multiple different -// copies of the 'buffer' package in use. This method works even for Buffer -// instances that were created from another copy of the `buffer` package. -// See: https://github.com/feross/buffer/issues/154 +// 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) { @@ -1499,7 +1904,7 @@ Buffer.prototype.swap64 = function swap64 () { } Buffer.prototype.toString = function toString () { - var length = this.length + var length = this.length | 0 if (length === 0) return '' if (arguments.length === 0) return utf8Slice(this, 0, length) return slowToString.apply(this, arguments) @@ -1603,7 +2008,7 @@ function bidirectionalIndexOf (buffer, val, byteOffset, encoding, dir) { byteOffset = -0x80000000 } byteOffset = +byteOffset // Coerce to Number. - if (numberIsNaN(byteOffset)) { + if (isNaN(byteOffset)) { // byteOffset: it it's undefined, null, NaN, "foo", etc, search whole buffer byteOffset = dir ? 0 : (buffer.length - 1) } @@ -1632,7 +2037,8 @@ function bidirectionalIndexOf (buffer, val, byteOffset, encoding, dir) { return arrayIndexOf(buffer, val, byteOffset, encoding, dir) } else if (typeof val === 'number') { val = val & 0xFF // Search for a byte value [0-255] - if (typeof Uint8Array.prototype.indexOf === 'function') { + if (Buffer.TYPED_ARRAY_SUPPORT && + typeof Uint8Array.prototype.indexOf === 'function') { if (dir) { return Uint8Array.prototype.indexOf.call(buffer, val, byteOffset) } else { @@ -1734,7 +2140,7 @@ function hexWrite (buf, string, offset, length) { } for (var i = 0; i < length; ++i) { var parsed = parseInt(string.substr(i * 2, 2), 16) - if (numberIsNaN(parsed)) return i + if (isNaN(parsed)) return i buf[offset + i] = parsed } return i @@ -1773,14 +2179,15 @@ Buffer.prototype.write = function write (string, offset, length, encoding) { offset = 0 // Buffer#write(string, offset[, length][, encoding]) } else if (isFinite(offset)) { - offset = offset >>> 0 + offset = offset | 0 if (isFinite(length)) { - length = length >>> 0 + 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' @@ -1979,7 +2386,7 @@ 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)) + res += String.fromCharCode(bytes[i] + bytes[i + 1] * 256) } return res } @@ -2005,9 +2412,18 @@ Buffer.prototype.slice = function slice (start, end) { if (end < start) end = start - var newBuf = this.subarray(start, end) - // Return an augmented `Uint8Array` instance - newBuf.__proto__ = Buffer.prototype + 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 } @@ -2020,8 +2436,8 @@ function checkOffset (offset, ext, length) { } Buffer.prototype.readUIntLE = function readUIntLE (offset, byteLength, noAssert) { - offset = offset >>> 0 - byteLength = byteLength >>> 0 + offset = offset | 0 + byteLength = byteLength | 0 if (!noAssert) checkOffset(offset, byteLength, this.length) var val = this[offset] @@ -2035,8 +2451,8 @@ Buffer.prototype.readUIntLE = function readUIntLE (offset, byteLength, noAssert) } Buffer.prototype.readUIntBE = function readUIntBE (offset, byteLength, noAssert) { - offset = offset >>> 0 - byteLength = byteLength >>> 0 + offset = offset | 0 + byteLength = byteLength | 0 if (!noAssert) { checkOffset(offset, byteLength, this.length) } @@ -2051,25 +2467,21 @@ Buffer.prototype.readUIntBE = function readUIntBE (offset, byteLength, noAssert) } Buffer.prototype.readUInt8 = function readUInt8 (offset, noAssert) { - offset = offset >>> 0 if (!noAssert) checkOffset(offset, 1, this.length) return this[offset] } Buffer.prototype.readUInt16LE = function readUInt16LE (offset, noAssert) { - offset = offset >>> 0 if (!noAssert) checkOffset(offset, 2, this.length) return this[offset] | (this[offset + 1] << 8) } Buffer.prototype.readUInt16BE = function readUInt16BE (offset, noAssert) { - offset = offset >>> 0 if (!noAssert) checkOffset(offset, 2, this.length) return (this[offset] << 8) | this[offset + 1] } Buffer.prototype.readUInt32LE = function readUInt32LE (offset, noAssert) { - offset = offset >>> 0 if (!noAssert) checkOffset(offset, 4, this.length) return ((this[offset]) | @@ -2079,7 +2491,6 @@ Buffer.prototype.readUInt32LE = function readUInt32LE (offset, noAssert) { } Buffer.prototype.readUInt32BE = function readUInt32BE (offset, noAssert) { - offset = offset >>> 0 if (!noAssert) checkOffset(offset, 4, this.length) return (this[offset] * 0x1000000) + @@ -2089,8 +2500,8 @@ Buffer.prototype.readUInt32BE = function readUInt32BE (offset, noAssert) { } Buffer.prototype.readIntLE = function readIntLE (offset, byteLength, noAssert) { - offset = offset >>> 0 - byteLength = byteLength >>> 0 + offset = offset | 0 + byteLength = byteLength | 0 if (!noAssert) checkOffset(offset, byteLength, this.length) var val = this[offset] @@ -2107,8 +2518,8 @@ Buffer.prototype.readIntLE = function readIntLE (offset, byteLength, noAssert) { } Buffer.prototype.readIntBE = function readIntBE (offset, byteLength, noAssert) { - offset = offset >>> 0 - byteLength = byteLength >>> 0 + offset = offset | 0 + byteLength = byteLength | 0 if (!noAssert) checkOffset(offset, byteLength, this.length) var i = byteLength @@ -2125,28 +2536,24 @@ Buffer.prototype.readIntBE = function readIntBE (offset, byteLength, noAssert) { } Buffer.prototype.readInt8 = function readInt8 (offset, noAssert) { - offset = offset >>> 0 if (!noAssert) checkOffset(offset, 1, this.length) if (!(this[offset] & 0x80)) return (this[offset]) return ((0xff - this[offset] + 1) * -1) } Buffer.prototype.readInt16LE = function readInt16LE (offset, noAssert) { - offset = offset >>> 0 if (!noAssert) checkOffset(offset, 2, this.length) var val = this[offset] | (this[offset + 1] << 8) return (val & 0x8000) ? val | 0xFFFF0000 : val } Buffer.prototype.readInt16BE = function readInt16BE (offset, noAssert) { - offset = offset >>> 0 if (!noAssert) checkOffset(offset, 2, this.length) var val = this[offset + 1] | (this[offset] << 8) return (val & 0x8000) ? val | 0xFFFF0000 : val } Buffer.prototype.readInt32LE = function readInt32LE (offset, noAssert) { - offset = offset >>> 0 if (!noAssert) checkOffset(offset, 4, this.length) return (this[offset]) | @@ -2156,7 +2563,6 @@ Buffer.prototype.readInt32LE = function readInt32LE (offset, noAssert) { } Buffer.prototype.readInt32BE = function readInt32BE (offset, noAssert) { - offset = offset >>> 0 if (!noAssert) checkOffset(offset, 4, this.length) return (this[offset] << 24) | @@ -2166,25 +2572,21 @@ Buffer.prototype.readInt32BE = function readInt32BE (offset, noAssert) { } Buffer.prototype.readFloatLE = function readFloatLE (offset, noAssert) { - offset = offset >>> 0 if (!noAssert) checkOffset(offset, 4, this.length) return ieee754.read(this, offset, true, 23, 4) } Buffer.prototype.readFloatBE = function readFloatBE (offset, noAssert) { - offset = offset >>> 0 if (!noAssert) checkOffset(offset, 4, this.length) return ieee754.read(this, offset, false, 23, 4) } Buffer.prototype.readDoubleLE = function readDoubleLE (offset, noAssert) { - offset = offset >>> 0 if (!noAssert) checkOffset(offset, 8, this.length) return ieee754.read(this, offset, true, 52, 8) } Buffer.prototype.readDoubleBE = function readDoubleBE (offset, noAssert) { - offset = offset >>> 0 if (!noAssert) checkOffset(offset, 8, this.length) return ieee754.read(this, offset, false, 52, 8) } @@ -2197,8 +2599,8 @@ function checkInt (buf, value, offset, ext, max, min) { Buffer.prototype.writeUIntLE = function writeUIntLE (value, offset, byteLength, noAssert) { value = +value - offset = offset >>> 0 - byteLength = byteLength >>> 0 + offset = offset | 0 + byteLength = byteLength | 0 if (!noAssert) { var maxBytes = Math.pow(2, 8 * byteLength) - 1 checkInt(this, value, offset, byteLength, maxBytes, 0) @@ -2216,8 +2618,8 @@ Buffer.prototype.writeUIntLE = function writeUIntLE (value, offset, byteLength, Buffer.prototype.writeUIntBE = function writeUIntBE (value, offset, byteLength, noAssert) { value = +value - offset = offset >>> 0 - byteLength = byteLength >>> 0 + offset = offset | 0 + byteLength = byteLength | 0 if (!noAssert) { var maxBytes = Math.pow(2, 8 * byteLength) - 1 checkInt(this, value, offset, byteLength, maxBytes, 0) @@ -2235,57 +2637,89 @@ Buffer.prototype.writeUIntBE = function writeUIntBE (value, offset, byteLength, Buffer.prototype.writeUInt8 = function writeUInt8 (value, offset, noAssert) { value = +value - offset = offset >>> 0 + 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 + offset = offset | 0 if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0) - this[offset] = (value & 0xff) - this[offset + 1] = (value >>> 8) + 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 + offset = offset | 0 if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0) - this[offset] = (value >>> 8) - this[offset + 1] = (value & 0xff) + 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 + offset = offset | 0 if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0) - this[offset + 3] = (value >>> 24) - this[offset + 2] = (value >>> 16) - this[offset + 1] = (value >>> 8) - this[offset] = (value & 0xff) + 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 + offset = offset | 0 if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0) - this[offset] = (value >>> 24) - this[offset + 1] = (value >>> 16) - this[offset + 2] = (value >>> 8) - this[offset + 3] = (value & 0xff) + 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 + offset = offset | 0 if (!noAssert) { - var limit = Math.pow(2, (8 * byteLength) - 1) + var limit = Math.pow(2, 8 * byteLength - 1) checkInt(this, value, offset, byteLength, limit - 1, -limit) } @@ -2306,9 +2740,9 @@ Buffer.prototype.writeIntLE = function writeIntLE (value, offset, byteLength, no Buffer.prototype.writeIntBE = function writeIntBE (value, offset, byteLength, noAssert) { value = +value - offset = offset >>> 0 + offset = offset | 0 if (!noAssert) { - var limit = Math.pow(2, (8 * byteLength) - 1) + var limit = Math.pow(2, 8 * byteLength - 1) checkInt(this, value, offset, byteLength, limit - 1, -limit) } @@ -2329,8 +2763,9 @@ Buffer.prototype.writeIntBE = function writeIntBE (value, offset, byteLength, no Buffer.prototype.writeInt8 = function writeInt8 (value, offset, noAssert) { value = +value - offset = offset >>> 0 + 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 @@ -2338,42 +2773,58 @@ Buffer.prototype.writeInt8 = function writeInt8 (value, offset, noAssert) { Buffer.prototype.writeInt16LE = function writeInt16LE (value, offset, noAssert) { value = +value - offset = offset >>> 0 + offset = offset | 0 if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000) - this[offset] = (value & 0xff) - this[offset + 1] = (value >>> 8) + 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 + offset = offset | 0 if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000) - this[offset] = (value >>> 8) - this[offset + 1] = (value & 0xff) + 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 + offset = offset | 0 if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000) - this[offset] = (value & 0xff) - this[offset + 1] = (value >>> 8) - this[offset + 2] = (value >>> 16) - this[offset + 3] = (value >>> 24) + 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 + offset = offset | 0 if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000) if (value < 0) value = 0xffffffff + value + 1 - this[offset] = (value >>> 24) - this[offset + 1] = (value >>> 16) - this[offset + 2] = (value >>> 8) - this[offset + 3] = (value & 0xff) + 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 } @@ -2383,8 +2834,6 @@ function checkIEEE754 (buf, value, offset, ext, max, min) { } function writeFloat (buf, value, offset, littleEndian, noAssert) { - value = +value - offset = offset >>> 0 if (!noAssert) { checkIEEE754(buf, value, offset, 4, 3.4028234663852886e+38, -3.4028234663852886e+38) } @@ -2401,8 +2850,6 @@ Buffer.prototype.writeFloatBE = function writeFloatBE (value, offset, noAssert) } function writeDouble (buf, value, offset, littleEndian, noAssert) { - value = +value - offset = offset >>> 0 if (!noAssert) { checkIEEE754(buf, value, offset, 8, 1.7976931348623157E+308, -1.7976931348623157E+308) } @@ -2451,7 +2898,7 @@ Buffer.prototype.copy = function copy (target, targetStart, start, end) { for (i = len - 1; i >= 0; --i) { target[i + targetStart] = this[i + start] } - } else if (len < 1000) { + } else if (len < 1000 || !Buffer.TYPED_ARRAY_SUPPORT) { // ascending copy from start for (i = 0; i < len; ++i) { target[i + targetStart] = this[i + start] @@ -2520,7 +2967,7 @@ Buffer.prototype.fill = function fill (val, start, end, encoding) { } else { var bytes = Buffer.isBuffer(val) ? val - : new Buffer(val, encoding) + : utf8ToBytes(new Buffer(val, encoding).toString()) var len = bytes.length for (i = 0; i < end - start; ++i) { this[i + start] = bytes[i % len] @@ -2533,11 +2980,11 @@ Buffer.prototype.fill = function fill (val, start, end, encoding) { // HELPER FUNCTIONS // ================ -var INVALID_BASE64_RE = /[^+/0-9A-Za-z-_]/g +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 = str.trim().replace(INVALID_BASE64_RE, '') + 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 @@ -2547,6 +2994,11 @@ function base64clean (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) @@ -2669,24 +3121,131 @@ function blitBuffer (src, dst, offset, length) { return i } -// ArrayBuffers from another context (i.e. an iframe) do not pass the `instanceof` check -// but they should be treated as valid. See: https://github.com/feross/buffer/issues/166 -function isArrayBuffer (obj) { - return obj instanceof ArrayBuffer || - (obj != null && obj.constructor != null && obj.constructor.name === 'ArrayBuffer' && - typeof obj.byteLength === 'number') +function isnan (val) { + return val !== val // eslint-disable-line no-self-compare } -// Node 0.10 supports `ArrayBuffer` but lacks `ArrayBuffer.isView` -function isArrayBufferView (obj) { - return (typeof ArrayBuffer.isView === 'function') && ArrayBuffer.isView(obj) +}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {}) +},{"base64-js":2,"ieee754":46,"isarray":8}],8:[function(require,module,exports){ +var toString = {}.toString; + +module.exports = Array.isArray || function (arr) { + return toString.call(arr) == '[object Array]'; +}; + +},{}],9:[function(require,module,exports){ +(function (global){ +'use strict'; + +var buffer = require('buffer'); +var Buffer = buffer.Buffer; +var SlowBuffer = buffer.SlowBuffer; +var MAX_LEN = buffer.kMaxLength || 2147483647; +exports.alloc = function alloc(size, fill, encoding) { + if (typeof Buffer.alloc === 'function') { + return Buffer.alloc(size, fill, encoding); + } + if (typeof encoding === 'number') { + throw new TypeError('encoding must not be number'); + } + if (typeof size !== 'number') { + throw new TypeError('size must be a number'); + } + if (size > MAX_LEN) { + throw new RangeError('size is too large'); + } + var enc = encoding; + var _fill = fill; + if (_fill === undefined) { + enc = undefined; + _fill = 0; + } + var buf = new Buffer(size); + if (typeof _fill === 'string') { + var fillBuf = new Buffer(_fill, enc); + var flen = fillBuf.length; + var i = -1; + while (++i < size) { + buf[i] = fillBuf[i % flen]; + } + } else { + buf.fill(_fill); + } + return buf; +} +exports.allocUnsafe = function allocUnsafe(size) { + if (typeof Buffer.allocUnsafe === 'function') { + return Buffer.allocUnsafe(size); + } + if (typeof size !== 'number') { + throw new TypeError('size must be a number'); + } + if (size > MAX_LEN) { + throw new RangeError('size is too large'); + } + return new Buffer(size); +} +exports.from = function from(value, encodingOrOffset, length) { + if (typeof Buffer.from === 'function' && (!global.Uint8Array || Uint8Array.from !== Buffer.from)) { + return Buffer.from(value, encodingOrOffset, length); + } + if (typeof value === 'number') { + throw new TypeError('"value" argument must not be a number'); + } + if (typeof value === 'string') { + return new Buffer(value, encodingOrOffset); + } + if (typeof ArrayBuffer !== 'undefined' && value instanceof ArrayBuffer) { + var offset = encodingOrOffset; + if (arguments.length === 1) { + return new Buffer(value); + } + if (typeof offset === 'undefined') { + offset = 0; + } + var len = length; + if (typeof len === 'undefined') { + len = value.byteLength - offset; + } + if (offset >= value.byteLength) { + throw new RangeError('\'offset\' is out of bounds'); + } + if (len > value.byteLength - offset) { + throw new RangeError('\'length\' is out of bounds'); + } + return new Buffer(value.slice(offset, offset + len)); + } + if (Buffer.isBuffer(value)) { + var out = new Buffer(value.length); + value.copy(out, 0, 0, value.length); + return out; + } + if (value) { + if (Array.isArray(value) || (typeof ArrayBuffer !== 'undefined' && value.buffer instanceof ArrayBuffer) || 'length' in value) { + return new Buffer(value); + } + if (value.type === 'Buffer' && Array.isArray(value.data)) { + return new Buffer(value.data); + } + } + + throw new TypeError('First argument must be a string, Buffer, ' + 'ArrayBuffer, Array, or array-like object.'); +} +exports.allocUnsafeSlow = function allocUnsafeSlow(size) { + if (typeof Buffer.allocUnsafeSlow === 'function') { + return Buffer.allocUnsafeSlow(size); + } + if (typeof size !== 'number') { + throw new TypeError('size must be a number'); + } + if (size >= MAX_LEN) { + throw new RangeError('size is too large'); + } + return new SlowBuffer(size); } -function numberIsNaN (obj) { - return obj !== obj // eslint-disable-line no-self-compare -} - -},{"base64-js":1,"ieee754":46}],6:[function(require,module,exports){ +}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {}) +},{"buffer":7}],10:[function(require,module,exports){ (function (Buffer){ /**! * contentstream - index.js @@ -2735,7 +3294,1979 @@ ContentStream.prototype._read = function (n) { }; }).call(this,require("buffer").Buffer) -},{"buffer":5,"readable-stream":100,"util":129}],7:[function(require,module,exports){ +},{"buffer":7,"readable-stream":17,"util":119}],11:[function(require,module,exports){ +module.exports = Array.isArray || function (arr) { + return Object.prototype.toString.call(arr) == '[object Array]'; +}; + +},{}],12:[function(require,module,exports){ +(function (process){ +// Copyright Joyent, Inc. and other Node contributors. +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the +// "Software"), to deal in the Software without restriction, including +// without limitation the rights to use, copy, modify, merge, publish, +// distribute, sublicense, and/or sell copies of the Software, and to permit +// persons to whom the Software is furnished to do so, subject to the +// following conditions: +// +// The above copyright notice and this permission notice shall be included +// in all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN +// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, +// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR +// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE +// USE OR OTHER DEALINGS IN THE SOFTWARE. + +// a duplex stream is just a stream that is both readable and writable. +// Since JS doesn't have multiple prototypal inheritance, this class +// prototypally inherits from Readable, and then parasitically from +// Writable. + +module.exports = Duplex; + +/**/ +var objectKeys = Object.keys || function (obj) { + var keys = []; + for (var key in obj) keys.push(key); + return keys; +} +/**/ + + +/**/ +var util = require('core-util-is'); +util.inherits = require('inherits'); +/**/ + +var Readable = require('./_stream_readable'); +var Writable = require('./_stream_writable'); + +util.inherits(Duplex, Readable); + +forEach(objectKeys(Writable.prototype), function(method) { + if (!Duplex.prototype[method]) + Duplex.prototype[method] = Writable.prototype[method]; +}); + +function Duplex(options) { + if (!(this instanceof Duplex)) + return new Duplex(options); + + Readable.call(this, options); + Writable.call(this, options); + + if (options && options.readable === false) + this.readable = false; + + if (options && options.writable === false) + this.writable = false; + + this.allowHalfOpen = true; + if (options && options.allowHalfOpen === false) + this.allowHalfOpen = false; + + this.once('end', onend); +} + +// the no-half-open enforcer +function onend() { + // if we allow half-open state, or if the writable side ended, + // then we're ok. + if (this.allowHalfOpen || this._writableState.ended) + return; + + // no more data can be written. + // But allow more writes to happen in this tick. + process.nextTick(this.end.bind(this)); +} + +function forEach (xs, f) { + for (var i = 0, l = xs.length; i < l; i++) { + f(xs[i], i); + } +} + +}).call(this,require('_process')) +},{"./_stream_readable":14,"./_stream_writable":16,"_process":94,"core-util-is":19,"inherits":47}],13:[function(require,module,exports){ +// Copyright Joyent, Inc. and other Node contributors. +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the +// "Software"), to deal in the Software without restriction, including +// without limitation the rights to use, copy, modify, merge, publish, +// distribute, sublicense, and/or sell copies of the Software, and to permit +// persons to whom the Software is furnished to do so, subject to the +// following conditions: +// +// The above copyright notice and this permission notice shall be included +// in all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN +// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, +// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR +// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE +// USE OR OTHER DEALINGS IN THE SOFTWARE. + +// a passthrough stream. +// basically just the most minimal sort of Transform stream. +// Every written chunk gets output as-is. + +module.exports = PassThrough; + +var Transform = require('./_stream_transform'); + +/**/ +var util = require('core-util-is'); +util.inherits = require('inherits'); +/**/ + +util.inherits(PassThrough, Transform); + +function PassThrough(options) { + if (!(this instanceof PassThrough)) + return new PassThrough(options); + + Transform.call(this, options); +} + +PassThrough.prototype._transform = function(chunk, encoding, cb) { + cb(null, chunk); +}; + +},{"./_stream_transform":15,"core-util-is":19,"inherits":47}],14:[function(require,module,exports){ +(function (process){ +// Copyright Joyent, Inc. and other Node contributors. +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the +// "Software"), to deal in the Software without restriction, including +// without limitation the rights to use, copy, modify, merge, publish, +// distribute, sublicense, and/or sell copies of the Software, and to permit +// persons to whom the Software is furnished to do so, subject to the +// following conditions: +// +// The above copyright notice and this permission notice shall be included +// in all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN +// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, +// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR +// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE +// USE OR OTHER DEALINGS IN THE SOFTWARE. + +module.exports = Readable; + +/**/ +var isArray = require('isarray'); +/**/ + + +/**/ +var Buffer = require('buffer').Buffer; +/**/ + +Readable.ReadableState = ReadableState; + +var EE = require('events').EventEmitter; + +/**/ +if (!EE.listenerCount) EE.listenerCount = function(emitter, type) { + return emitter.listeners(type).length; +}; +/**/ + +var Stream = require('stream'); + +/**/ +var util = require('core-util-is'); +util.inherits = require('inherits'); +/**/ + +var StringDecoder; + +util.inherits(Readable, Stream); + +function ReadableState(options, stream) { + options = options || {}; + + // the point at which it stops calling _read() to fill the buffer + // Note: 0 is a valid value, means "don't call _read preemptively ever" + var hwm = options.highWaterMark; + this.highWaterMark = (hwm || hwm === 0) ? hwm : 16 * 1024; + + // cast to ints. + this.highWaterMark = ~~this.highWaterMark; + + this.buffer = []; + this.length = 0; + this.pipes = null; + this.pipesCount = 0; + this.flowing = false; + this.ended = false; + this.endEmitted = false; + this.reading = false; + + // In streams that never have any data, and do push(null) right away, + // the consumer can miss the 'end' event if they do some I/O before + // consuming the stream. So, we don't emit('end') until some reading + // happens. + this.calledRead = false; + + // a flag to be able to tell if the onwrite cb is called immediately, + // or on a later tick. We set this to true at first, becuase any + // actions that shouldn't happen until "later" should generally also + // not happen before the first write call. + this.sync = true; + + // whenever we return null, then we set a flag to say + // that we're awaiting a 'readable' event emission. + this.needReadable = false; + this.emittedReadable = false; + this.readableListening = false; + + + // object stream flag. Used to make read(n) ignore n and to + // make all the buffer merging and length checks go away + this.objectMode = !!options.objectMode; + + // Crypto is kind of old and crusty. Historically, its default string + // encoding is 'binary' so we have to make this configurable. + // Everything else in the universe uses 'utf8', though. + this.defaultEncoding = options.defaultEncoding || 'utf8'; + + // when piping, we only care about 'readable' events that happen + // after read()ing all the bytes and not getting any pushback. + this.ranOut = false; + + // the number of writers that are awaiting a drain event in .pipe()s + this.awaitDrain = 0; + + // if true, a maybeReadMore has been scheduled + this.readingMore = false; + + this.decoder = null; + this.encoding = null; + if (options.encoding) { + if (!StringDecoder) + StringDecoder = require('string_decoder/').StringDecoder; + this.decoder = new StringDecoder(options.encoding); + this.encoding = options.encoding; + } +} + +function Readable(options) { + if (!(this instanceof Readable)) + return new Readable(options); + + this._readableState = new ReadableState(options, this); + + // legacy + this.readable = true; + + Stream.call(this); +} + +// Manually shove something into the read() buffer. +// This returns true if the highWaterMark has not been hit yet, +// similar to how Writable.write() returns true if you should +// write() some more. +Readable.prototype.push = function(chunk, encoding) { + var state = this._readableState; + + if (typeof chunk === 'string' && !state.objectMode) { + encoding = encoding || state.defaultEncoding; + if (encoding !== state.encoding) { + chunk = new Buffer(chunk, encoding); + encoding = ''; + } + } + + return readableAddChunk(this, state, chunk, encoding, false); +}; + +// Unshift should *always* be something directly out of read() +Readable.prototype.unshift = function(chunk) { + var state = this._readableState; + return readableAddChunk(this, state, chunk, '', true); +}; + +function readableAddChunk(stream, state, chunk, encoding, addToFront) { + var er = chunkInvalid(state, chunk); + if (er) { + stream.emit('error', er); + } else if (chunk === null || chunk === undefined) { + state.reading = false; + if (!state.ended) + onEofChunk(stream, state); + } else if (state.objectMode || chunk && chunk.length > 0) { + if (state.ended && !addToFront) { + var e = new Error('stream.push() after EOF'); + stream.emit('error', e); + } else if (state.endEmitted && addToFront) { + var e = new Error('stream.unshift() after end event'); + stream.emit('error', e); + } else { + if (state.decoder && !addToFront && !encoding) + chunk = state.decoder.write(chunk); + + // update the buffer info. + state.length += state.objectMode ? 1 : chunk.length; + if (addToFront) { + state.buffer.unshift(chunk); + } else { + state.reading = false; + state.buffer.push(chunk); + } + + if (state.needReadable) + emitReadable(stream); + + maybeReadMore(stream, state); + } + } else if (!addToFront) { + state.reading = false; + } + + return needMoreData(state); +} + + + +// if it's past the high water mark, we can push in some more. +// Also, if we have no data yet, we can stand some +// more bytes. This is to work around cases where hwm=0, +// such as the repl. Also, if the push() triggered a +// readable event, and the user called read(largeNumber) such that +// needReadable was set, then we ought to push more, so that another +// 'readable' event will be triggered. +function needMoreData(state) { + return !state.ended && + (state.needReadable || + state.length < state.highWaterMark || + state.length === 0); +} + +// backwards compatibility. +Readable.prototype.setEncoding = function(enc) { + if (!StringDecoder) + StringDecoder = require('string_decoder/').StringDecoder; + this._readableState.decoder = new StringDecoder(enc); + this._readableState.encoding = enc; +}; + +// Don't raise the hwm > 128MB +var MAX_HWM = 0x800000; +function roundUpToNextPowerOf2(n) { + if (n >= MAX_HWM) { + n = MAX_HWM; + } else { + // Get the next highest power of 2 + n--; + for (var p = 1; p < 32; p <<= 1) n |= n >> p; + n++; + } + return n; +} + +function howMuchToRead(n, state) { + if (state.length === 0 && state.ended) + return 0; + + if (state.objectMode) + return n === 0 ? 0 : 1; + + if (n === null || isNaN(n)) { + // only flow one buffer at a time + if (state.flowing && state.buffer.length) + return state.buffer[0].length; + else + return state.length; + } + + if (n <= 0) + return 0; + + // If we're asking for more than the target buffer level, + // then raise the water mark. Bump up to the next highest + // power of 2, to prevent increasing it excessively in tiny + // amounts. + if (n > state.highWaterMark) + state.highWaterMark = roundUpToNextPowerOf2(n); + + // don't have that much. return null, unless we've ended. + if (n > state.length) { + if (!state.ended) { + state.needReadable = true; + return 0; + } else + return state.length; + } + + return n; +} + +// you can override either this method, or the async _read(n) below. +Readable.prototype.read = function(n) { + var state = this._readableState; + state.calledRead = true; + var nOrig = n; + var ret; + + if (typeof n !== 'number' || n > 0) + state.emittedReadable = false; + + // if we're doing read(0) to trigger a readable event, but we + // already have a bunch of data in the buffer, then just trigger + // the 'readable' event and move on. + if (n === 0 && + state.needReadable && + (state.length >= state.highWaterMark || state.ended)) { + emitReadable(this); + return null; + } + + n = howMuchToRead(n, state); + + // if we've ended, and we're now clear, then finish it up. + if (n === 0 && state.ended) { + ret = null; + + // In cases where the decoder did not receive enough data + // to produce a full chunk, then immediately received an + // EOF, state.buffer will contain [, ]. + // howMuchToRead will see this and coerce the amount to + // read to zero (because it's looking at the length of the + // first in state.buffer), and we'll end up here. + // + // This can only happen via state.decoder -- no other venue + // exists for pushing a zero-length chunk into state.buffer + // and triggering this behavior. In this case, we return our + // remaining data and end the stream, if appropriate. + if (state.length > 0 && state.decoder) { + ret = fromList(n, state); + state.length -= ret.length; + } + + if (state.length === 0) + endReadable(this); + + return ret; + } + + // All the actual chunk generation logic needs to be + // *below* the call to _read. The reason is that in certain + // synthetic stream cases, such as passthrough streams, _read + // may be a completely synchronous operation which may change + // the state of the read buffer, providing enough data when + // before there was *not* enough. + // + // So, the steps are: + // 1. Figure out what the state of things will be after we do + // a read from the buffer. + // + // 2. If that resulting state will trigger a _read, then call _read. + // Note that this may be asynchronous, or synchronous. Yes, it is + // deeply ugly to write APIs this way, but that still doesn't mean + // that the Readable class should behave improperly, as streams are + // designed to be sync/async agnostic. + // Take note if the _read call is sync or async (ie, if the read call + // has returned yet), so that we know whether or not it's safe to emit + // 'readable' etc. + // + // 3. Actually pull the requested chunks out of the buffer and return. + + // if we need a readable event, then we need to do some reading. + var doRead = state.needReadable; + + // if we currently have less than the highWaterMark, then also read some + if (state.length - n <= state.highWaterMark) + doRead = true; + + // however, if we've ended, then there's no point, and if we're already + // reading, then it's unnecessary. + if (state.ended || state.reading) + doRead = false; + + if (doRead) { + state.reading = true; + state.sync = true; + // if the length is currently zero, then we *need* a readable event. + if (state.length === 0) + state.needReadable = true; + // call internal read method + this._read(state.highWaterMark); + state.sync = false; + } + + // If _read called its callback synchronously, then `reading` + // will be false, and we need to re-evaluate how much data we + // can return to the user. + if (doRead && !state.reading) + n = howMuchToRead(nOrig, state); + + if (n > 0) + ret = fromList(n, state); + else + ret = null; + + if (ret === null) { + state.needReadable = true; + n = 0; + } + + state.length -= n; + + // If we have nothing in the buffer, then we want to know + // as soon as we *do* get something into the buffer. + if (state.length === 0 && !state.ended) + state.needReadable = true; + + // If we happened to read() exactly the remaining amount in the + // buffer, and the EOF has been seen at this point, then make sure + // that we emit 'end' on the very next tick. + if (state.ended && !state.endEmitted && state.length === 0) + endReadable(this); + + return ret; +}; + +function chunkInvalid(state, chunk) { + var er = null; + if (!Buffer.isBuffer(chunk) && + 'string' !== typeof chunk && + chunk !== null && + chunk !== undefined && + !state.objectMode) { + er = new TypeError('Invalid non-string/buffer chunk'); + } + return er; +} + + +function onEofChunk(stream, state) { + if (state.decoder && !state.ended) { + var chunk = state.decoder.end(); + if (chunk && chunk.length) { + state.buffer.push(chunk); + state.length += state.objectMode ? 1 : chunk.length; + } + } + state.ended = true; + + // if we've ended and we have some data left, then emit + // 'readable' now to make sure it gets picked up. + if (state.length > 0) + emitReadable(stream); + else + endReadable(stream); +} + +// Don't emit readable right away in sync mode, because this can trigger +// another read() call => stack overflow. This way, it might trigger +// a nextTick recursion warning, but that's not so bad. +function emitReadable(stream) { + var state = stream._readableState; + state.needReadable = false; + if (state.emittedReadable) + return; + + state.emittedReadable = true; + if (state.sync) + process.nextTick(function() { + emitReadable_(stream); + }); + else + emitReadable_(stream); +} + +function emitReadable_(stream) { + stream.emit('readable'); +} + + +// at this point, the user has presumably seen the 'readable' event, +// and called read() to consume some data. that may have triggered +// in turn another _read(n) call, in which case reading = true if +// it's in progress. +// However, if we're not ended, or reading, and the length < hwm, +// then go ahead and try to read some more preemptively. +function maybeReadMore(stream, state) { + if (!state.readingMore) { + state.readingMore = true; + process.nextTick(function() { + maybeReadMore_(stream, state); + }); + } +} + +function maybeReadMore_(stream, state) { + var len = state.length; + while (!state.reading && !state.flowing && !state.ended && + state.length < state.highWaterMark) { + stream.read(0); + if (len === state.length) + // didn't get any data, stop spinning. + break; + else + len = state.length; + } + state.readingMore = false; +} + +// abstract method. to be overridden in specific implementation classes. +// call cb(er, data) where data is <= n in length. +// for virtual (non-string, non-buffer) streams, "length" is somewhat +// arbitrary, and perhaps not very meaningful. +Readable.prototype._read = function(n) { + this.emit('error', new Error('not implemented')); +}; + +Readable.prototype.pipe = function(dest, pipeOpts) { + var src = this; + var state = this._readableState; + + switch (state.pipesCount) { + case 0: + state.pipes = dest; + break; + case 1: + state.pipes = [state.pipes, dest]; + break; + default: + state.pipes.push(dest); + break; + } + state.pipesCount += 1; + + var doEnd = (!pipeOpts || pipeOpts.end !== false) && + dest !== process.stdout && + dest !== process.stderr; + + var endFn = doEnd ? onend : cleanup; + if (state.endEmitted) + process.nextTick(endFn); + else + src.once('end', endFn); + + dest.on('unpipe', onunpipe); + function onunpipe(readable) { + if (readable !== src) return; + cleanup(); + } + + function onend() { + dest.end(); + } + + // when the dest drains, it reduces the awaitDrain counter + // on the source. This would be more elegant with a .once() + // handler in flow(), but adding and removing repeatedly is + // too slow. + var ondrain = pipeOnDrain(src); + dest.on('drain', ondrain); + + function cleanup() { + // cleanup event handlers once the pipe is broken + dest.removeListener('close', onclose); + dest.removeListener('finish', onfinish); + dest.removeListener('drain', ondrain); + dest.removeListener('error', onerror); + dest.removeListener('unpipe', onunpipe); + src.removeListener('end', onend); + src.removeListener('end', cleanup); + + // if the reader is waiting for a drain event from this + // specific writer, then it would cause it to never start + // flowing again. + // So, if this is awaiting a drain, then we just call it now. + // If we don't know, then assume that we are waiting for one. + if (!dest._writableState || dest._writableState.needDrain) + ondrain(); + } + + // if the dest has an error, then stop piping into it. + // however, don't suppress the throwing behavior for this. + function onerror(er) { + unpipe(); + dest.removeListener('error', onerror); + if (EE.listenerCount(dest, 'error') === 0) + dest.emit('error', er); + } + // This is a brutally ugly hack to make sure that our error handler + // is attached before any userland ones. NEVER DO THIS. + if (!dest._events || !dest._events.error) + dest.on('error', onerror); + else if (isArray(dest._events.error)) + dest._events.error.unshift(onerror); + else + dest._events.error = [onerror, dest._events.error]; + + + + // Both close and finish should trigger unpipe, but only once. + function onclose() { + dest.removeListener('finish', onfinish); + unpipe(); + } + dest.once('close', onclose); + function onfinish() { + dest.removeListener('close', onclose); + unpipe(); + } + dest.once('finish', onfinish); + + function unpipe() { + src.unpipe(dest); + } + + // tell the dest that it's being piped to + dest.emit('pipe', src); + + // start the flow if it hasn't been started already. + if (!state.flowing) { + // the handler that waits for readable events after all + // the data gets sucked out in flow. + // This would be easier to follow with a .once() handler + // in flow(), but that is too slow. + this.on('readable', pipeOnReadable); + + state.flowing = true; + process.nextTick(function() { + flow(src); + }); + } + + return dest; +}; + +function pipeOnDrain(src) { + return function() { + var dest = this; + var state = src._readableState; + state.awaitDrain--; + if (state.awaitDrain === 0) + flow(src); + }; +} + +function flow(src) { + var state = src._readableState; + var chunk; + state.awaitDrain = 0; + + function write(dest, i, list) { + var written = dest.write(chunk); + if (false === written) { + state.awaitDrain++; + } + } + + while (state.pipesCount && null !== (chunk = src.read())) { + + if (state.pipesCount === 1) + write(state.pipes, 0, null); + else + forEach(state.pipes, write); + + src.emit('data', chunk); + + // if anyone needs a drain, then we have to wait for that. + if (state.awaitDrain > 0) + return; + } + + // if every destination was unpiped, either before entering this + // function, or in the while loop, then stop flowing. + // + // NB: This is a pretty rare edge case. + if (state.pipesCount === 0) { + state.flowing = false; + + // if there were data event listeners added, then switch to old mode. + if (EE.listenerCount(src, 'data') > 0) + emitDataEvents(src); + return; + } + + // at this point, no one needed a drain, so we just ran out of data + // on the next readable event, start it over again. + state.ranOut = true; +} + +function pipeOnReadable() { + if (this._readableState.ranOut) { + this._readableState.ranOut = false; + flow(this); + } +} + + +Readable.prototype.unpipe = function(dest) { + var state = this._readableState; + + // if we're not piping anywhere, then do nothing. + if (state.pipesCount === 0) + return this; + + // just one destination. most common case. + if (state.pipesCount === 1) { + // passed in one, but it's not the right one. + if (dest && dest !== state.pipes) + return this; + + if (!dest) + dest = state.pipes; + + // got a match. + state.pipes = null; + state.pipesCount = 0; + this.removeListener('readable', pipeOnReadable); + state.flowing = false; + if (dest) + dest.emit('unpipe', this); + return this; + } + + // slow case. multiple pipe destinations. + + if (!dest) { + // remove all. + var dests = state.pipes; + var len = state.pipesCount; + state.pipes = null; + state.pipesCount = 0; + this.removeListener('readable', pipeOnReadable); + state.flowing = false; + + for (var i = 0; i < len; i++) + dests[i].emit('unpipe', this); + return this; + } + + // try to find the right one. + var i = indexOf(state.pipes, dest); + if (i === -1) + return this; + + state.pipes.splice(i, 1); + state.pipesCount -= 1; + if (state.pipesCount === 1) + state.pipes = state.pipes[0]; + + dest.emit('unpipe', this); + + return this; +}; + +// set up data events if they are asked for +// Ensure readable listeners eventually get something +Readable.prototype.on = function(ev, fn) { + var res = Stream.prototype.on.call(this, ev, fn); + + if (ev === 'data' && !this._readableState.flowing) + emitDataEvents(this); + + if (ev === 'readable' && this.readable) { + var state = this._readableState; + if (!state.readableListening) { + state.readableListening = true; + state.emittedReadable = false; + state.needReadable = true; + if (!state.reading) { + this.read(0); + } else if (state.length) { + emitReadable(this, state); + } + } + } + + return res; +}; +Readable.prototype.addListener = Readable.prototype.on; + +// pause() and resume() are remnants of the legacy readable stream API +// If the user uses them, then switch into old mode. +Readable.prototype.resume = function() { + emitDataEvents(this); + this.read(0); + this.emit('resume'); +}; + +Readable.prototype.pause = function() { + emitDataEvents(this, true); + this.emit('pause'); +}; + +function emitDataEvents(stream, startPaused) { + var state = stream._readableState; + + if (state.flowing) { + // https://github.com/isaacs/readable-stream/issues/16 + throw new Error('Cannot switch to old mode now.'); + } + + var paused = startPaused || false; + var readable = false; + + // convert to an old-style stream. + stream.readable = true; + stream.pipe = Stream.prototype.pipe; + stream.on = stream.addListener = Stream.prototype.on; + + stream.on('readable', function() { + readable = true; + + var c; + while (!paused && (null !== (c = stream.read()))) + stream.emit('data', c); + + if (c === null) { + readable = false; + stream._readableState.needReadable = true; + } + }); + + stream.pause = function() { + paused = true; + this.emit('pause'); + }; + + stream.resume = function() { + paused = false; + if (readable) + process.nextTick(function() { + stream.emit('readable'); + }); + else + this.read(0); + this.emit('resume'); + }; + + // now make it start, just in case it hadn't already. + stream.emit('readable'); +} + +// wrap an old-style stream as the async data source. +// This is *not* part of the readable stream interface. +// It is an ugly unfortunate mess of history. +Readable.prototype.wrap = function(stream) { + var state = this._readableState; + var paused = false; + + var self = this; + stream.on('end', function() { + if (state.decoder && !state.ended) { + var chunk = state.decoder.end(); + if (chunk && chunk.length) + self.push(chunk); + } + + self.push(null); + }); + + stream.on('data', function(chunk) { + if (state.decoder) + chunk = state.decoder.write(chunk); + + // don't skip over falsy values in objectMode + //if (state.objectMode && util.isNullOrUndefined(chunk)) + if (state.objectMode && (chunk === null || chunk === undefined)) + return; + else if (!state.objectMode && (!chunk || !chunk.length)) + return; + + var ret = self.push(chunk); + if (!ret) { + paused = true; + stream.pause(); + } + }); + + // proxy all the other methods. + // important when wrapping filters and duplexes. + for (var i in stream) { + if (typeof stream[i] === 'function' && + typeof this[i] === 'undefined') { + this[i] = function(method) { return function() { + return stream[method].apply(stream, arguments); + }}(i); + } + } + + // proxy certain important events. + var events = ['error', 'close', 'destroy', 'pause', 'resume']; + forEach(events, function(ev) { + stream.on(ev, self.emit.bind(self, ev)); + }); + + // when we try to consume some more bytes, simply unpause the + // underlying stream. + self._read = function(n) { + if (paused) { + paused = false; + stream.resume(); + } + }; + + return self; +}; + + + +// exposed for testing purposes only. +Readable._fromList = fromList; + +// Pluck off n bytes from an array of buffers. +// Length is the combined lengths of all the buffers in the list. +function fromList(n, state) { + var list = state.buffer; + var length = state.length; + var stringMode = !!state.decoder; + var objectMode = !!state.objectMode; + var ret; + + // nothing in the list, definitely empty. + if (list.length === 0) + return null; + + if (length === 0) + ret = null; + else if (objectMode) + ret = list.shift(); + else if (!n || n >= length) { + // read it all, truncate the array. + if (stringMode) + ret = list.join(''); + else + ret = Buffer.concat(list, length); + list.length = 0; + } else { + // read just some of it. + if (n < list[0].length) { + // just take a part of the first list item. + // slice is the same for buffers and strings. + var buf = list[0]; + ret = buf.slice(0, n); + list[0] = buf.slice(n); + } else if (n === list[0].length) { + // first list is a perfect match + ret = list.shift(); + } else { + // complex case. + // we have enough to cover it, but it spans past the first buffer. + if (stringMode) + ret = ''; + else + ret = new Buffer(n); + + var c = 0; + for (var i = 0, l = list.length; i < l && c < n; i++) { + var buf = list[0]; + var cpy = Math.min(n - c, buf.length); + + if (stringMode) + ret += buf.slice(0, cpy); + else + buf.copy(ret, c, 0, cpy); + + if (cpy < buf.length) + list[0] = buf.slice(cpy); + else + list.shift(); + + c += cpy; + } + } + } + + return ret; +} + +function endReadable(stream) { + var state = stream._readableState; + + // If we get here before consuming all the bytes, then that is a + // bug in node. Should never happen. + if (state.length > 0) + throw new Error('endReadable called on non-empty stream'); + + if (!state.endEmitted && state.calledRead) { + state.ended = true; + process.nextTick(function() { + // Check that we didn't get one last unshift. + if (!state.endEmitted && state.length === 0) { + state.endEmitted = true; + stream.readable = false; + stream.emit('end'); + } + }); + } +} + +function forEach (xs, f) { + for (var i = 0, l = xs.length; i < l; i++) { + f(xs[i], i); + } +} + +function indexOf (xs, x) { + for (var i = 0, l = xs.length; i < l; i++) { + if (xs[i] === x) return i; + } + return -1; +} + +}).call(this,require('_process')) +},{"_process":94,"buffer":7,"core-util-is":19,"events":24,"inherits":47,"isarray":11,"stream":111,"string_decoder/":18}],15:[function(require,module,exports){ +// Copyright Joyent, Inc. and other Node contributors. +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the +// "Software"), to deal in the Software without restriction, including +// without limitation the rights to use, copy, modify, merge, publish, +// distribute, sublicense, and/or sell copies of the Software, and to permit +// persons to whom the Software is furnished to do so, subject to the +// following conditions: +// +// The above copyright notice and this permission notice shall be included +// in all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN +// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, +// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR +// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE +// USE OR OTHER DEALINGS IN THE SOFTWARE. + + +// a transform stream is a readable/writable stream where you do +// something with the data. Sometimes it's called a "filter", +// but that's not a great name for it, since that implies a thing where +// some bits pass through, and others are simply ignored. (That would +// be a valid example of a transform, of course.) +// +// While the output is causally related to the input, it's not a +// necessarily symmetric or synchronous transformation. For example, +// a zlib stream might take multiple plain-text writes(), and then +// emit a single compressed chunk some time in the future. +// +// Here's how this works: +// +// The Transform stream has all the aspects of the readable and writable +// stream classes. When you write(chunk), that calls _write(chunk,cb) +// internally, and returns false if there's a lot of pending writes +// buffered up. When you call read(), that calls _read(n) until +// there's enough pending readable data buffered up. +// +// In a transform stream, the written data is placed in a buffer. When +// _read(n) is called, it transforms the queued up data, calling the +// buffered _write cb's as it consumes chunks. If consuming a single +// written chunk would result in multiple output chunks, then the first +// outputted bit calls the readcb, and subsequent chunks just go into +// the read buffer, and will cause it to emit 'readable' if necessary. +// +// This way, back-pressure is actually determined by the reading side, +// since _read has to be called to start processing a new chunk. However, +// a pathological inflate type of transform can cause excessive buffering +// here. For example, imagine a stream where every byte of input is +// interpreted as an integer from 0-255, and then results in that many +// bytes of output. Writing the 4 bytes {ff,ff,ff,ff} would result in +// 1kb of data being output. In this case, you could write a very small +// amount of input, and end up with a very large amount of output. In +// such a pathological inflating mechanism, there'd be no way to tell +// the system to stop doing the transform. A single 4MB write could +// cause the system to run out of memory. +// +// However, even in such a pathological case, only a single written chunk +// would be consumed, and then the rest would wait (un-transformed) until +// the results of the previous transformed chunk were consumed. + +module.exports = Transform; + +var Duplex = require('./_stream_duplex'); + +/**/ +var util = require('core-util-is'); +util.inherits = require('inherits'); +/**/ + +util.inherits(Transform, Duplex); + + +function TransformState(options, stream) { + this.afterTransform = function(er, data) { + return afterTransform(stream, er, data); + }; + + this.needTransform = false; + this.transforming = false; + this.writecb = null; + this.writechunk = null; +} + +function afterTransform(stream, er, data) { + var ts = stream._transformState; + ts.transforming = false; + + var cb = ts.writecb; + + if (!cb) + return stream.emit('error', new Error('no writecb in Transform class')); + + ts.writechunk = null; + ts.writecb = null; + + if (data !== null && data !== undefined) + stream.push(data); + + if (cb) + cb(er); + + var rs = stream._readableState; + rs.reading = false; + if (rs.needReadable || rs.length < rs.highWaterMark) { + stream._read(rs.highWaterMark); + } +} + + +function Transform(options) { + if (!(this instanceof Transform)) + return new Transform(options); + + Duplex.call(this, options); + + var ts = this._transformState = new TransformState(options, this); + + // when the writable side finishes, then flush out anything remaining. + var stream = this; + + // start out asking for a readable event once data is transformed. + this._readableState.needReadable = true; + + // we have implemented the _read method, and done the other things + // that Readable wants before the first _read call, so unset the + // sync guard flag. + this._readableState.sync = false; + + this.once('finish', function() { + if ('function' === typeof this._flush) + this._flush(function(er) { + done(stream, er); + }); + else + done(stream); + }); +} + +Transform.prototype.push = function(chunk, encoding) { + this._transformState.needTransform = false; + return Duplex.prototype.push.call(this, chunk, encoding); +}; + +// This is the part where you do stuff! +// override this function in implementation classes. +// 'chunk' is an input chunk. +// +// Call `push(newChunk)` to pass along transformed output +// to the readable side. You may call 'push' zero or more times. +// +// Call `cb(err)` when you are done with this chunk. If you pass +// an error, then that'll put the hurt on the whole operation. If you +// never call cb(), then you'll never get another chunk. +Transform.prototype._transform = function(chunk, encoding, cb) { + throw new Error('not implemented'); +}; + +Transform.prototype._write = function(chunk, encoding, cb) { + var ts = this._transformState; + ts.writecb = cb; + ts.writechunk = chunk; + ts.writeencoding = encoding; + if (!ts.transforming) { + var rs = this._readableState; + if (ts.needTransform || + rs.needReadable || + rs.length < rs.highWaterMark) + this._read(rs.highWaterMark); + } +}; + +// Doesn't matter what the args are here. +// _transform does all the work. +// That we got here means that the readable side wants more data. +Transform.prototype._read = function(n) { + var ts = this._transformState; + + if (ts.writechunk !== null && ts.writecb && !ts.transforming) { + ts.transforming = true; + this._transform(ts.writechunk, ts.writeencoding, ts.afterTransform); + } else { + // mark that we need a transform, so that any data that comes in + // will get processed, now that we've asked for it. + ts.needTransform = true; + } +}; + + +function done(stream, er) { + if (er) + return stream.emit('error', er); + + // if there's nothing in the write buffer, then that means + // that nothing more will ever be provided + var ws = stream._writableState; + var rs = stream._readableState; + var ts = stream._transformState; + + if (ws.length) + throw new Error('calling transform done when ws.length != 0'); + + if (ts.transforming) + throw new Error('calling transform done when still transforming'); + + return stream.push(null); +} + +},{"./_stream_duplex":12,"core-util-is":19,"inherits":47}],16:[function(require,module,exports){ +(function (process){ +// Copyright Joyent, Inc. and other Node contributors. +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the +// "Software"), to deal in the Software without restriction, including +// without limitation the rights to use, copy, modify, merge, publish, +// distribute, sublicense, and/or sell copies of the Software, and to permit +// persons to whom the Software is furnished to do so, subject to the +// following conditions: +// +// The above copyright notice and this permission notice shall be included +// in all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN +// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, +// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR +// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE +// USE OR OTHER DEALINGS IN THE SOFTWARE. + +// A bit simpler than readable streams. +// Implement an async ._write(chunk, cb), and it'll handle all +// the drain event emission and buffering. + +module.exports = Writable; + +/**/ +var Buffer = require('buffer').Buffer; +/**/ + +Writable.WritableState = WritableState; + + +/**/ +var util = require('core-util-is'); +util.inherits = require('inherits'); +/**/ + +var Stream = require('stream'); + +util.inherits(Writable, Stream); + +function WriteReq(chunk, encoding, cb) { + this.chunk = chunk; + this.encoding = encoding; + this.callback = cb; +} + +function WritableState(options, stream) { + options = options || {}; + + // the point at which write() starts returning false + // Note: 0 is a valid value, means that we always return false if + // the entire buffer is not flushed immediately on write() + var hwm = options.highWaterMark; + this.highWaterMark = (hwm || hwm === 0) ? hwm : 16 * 1024; + + // object stream flag to indicate whether or not this stream + // contains buffers or objects. + this.objectMode = !!options.objectMode; + + // cast to ints. + this.highWaterMark = ~~this.highWaterMark; + + this.needDrain = false; + // at the start of calling end() + this.ending = false; + // when end() has been called, and returned + this.ended = false; + // when 'finish' is emitted + this.finished = false; + + // should we decode strings into buffers before passing to _write? + // this is here so that some node-core streams can optimize string + // handling at a lower level. + var noDecode = options.decodeStrings === false; + this.decodeStrings = !noDecode; + + // Crypto is kind of old and crusty. Historically, its default string + // encoding is 'binary' so we have to make this configurable. + // Everything else in the universe uses 'utf8', though. + this.defaultEncoding = options.defaultEncoding || 'utf8'; + + // not an actual buffer we keep track of, but a measurement + // of how much we're waiting to get pushed to some underlying + // socket or file. + this.length = 0; + + // a flag to see when we're in the middle of a write. + this.writing = false; + + // a flag to be able to tell if the onwrite cb is called immediately, + // or on a later tick. We set this to true at first, becuase any + // actions that shouldn't happen until "later" should generally also + // not happen before the first write call. + this.sync = true; + + // a flag to know if we're processing previously buffered items, which + // may call the _write() callback in the same tick, so that we don't + // end up in an overlapped onwrite situation. + this.bufferProcessing = false; + + // the callback that's passed to _write(chunk,cb) + this.onwrite = function(er) { + onwrite(stream, er); + }; + + // the callback that the user supplies to write(chunk,encoding,cb) + this.writecb = null; + + // the amount that is being written when _write is called. + this.writelen = 0; + + this.buffer = []; + + // True if the error was already emitted and should not be thrown again + this.errorEmitted = false; +} + +function Writable(options) { + var Duplex = require('./_stream_duplex'); + + // Writable ctor is applied to Duplexes, though they're not + // instanceof Writable, they're instanceof Readable. + if (!(this instanceof Writable) && !(this instanceof Duplex)) + return new Writable(options); + + this._writableState = new WritableState(options, this); + + // legacy. + this.writable = true; + + Stream.call(this); +} + +// Otherwise people can pipe Writable streams, which is just wrong. +Writable.prototype.pipe = function() { + this.emit('error', new Error('Cannot pipe. Not readable.')); +}; + + +function writeAfterEnd(stream, state, cb) { + var er = new Error('write after end'); + // TODO: defer error events consistently everywhere, not just the cb + stream.emit('error', er); + process.nextTick(function() { + cb(er); + }); +} + +// If we get something that is not a buffer, string, null, or undefined, +// and we're not in objectMode, then that's an error. +// Otherwise stream chunks are all considered to be of length=1, and the +// watermarks determine how many objects to keep in the buffer, rather than +// how many bytes or characters. +function validChunk(stream, state, chunk, cb) { + var valid = true; + if (!Buffer.isBuffer(chunk) && + 'string' !== typeof chunk && + chunk !== null && + chunk !== undefined && + !state.objectMode) { + var er = new TypeError('Invalid non-string/buffer chunk'); + stream.emit('error', er); + process.nextTick(function() { + cb(er); + }); + valid = false; + } + return valid; +} + +Writable.prototype.write = function(chunk, encoding, cb) { + var state = this._writableState; + var ret = false; + + if (typeof encoding === 'function') { + cb = encoding; + encoding = null; + } + + if (Buffer.isBuffer(chunk)) + encoding = 'buffer'; + else if (!encoding) + encoding = state.defaultEncoding; + + if (typeof cb !== 'function') + cb = function() {}; + + if (state.ended) + writeAfterEnd(this, state, cb); + else if (validChunk(this, state, chunk, cb)) + ret = writeOrBuffer(this, state, chunk, encoding, cb); + + return ret; +}; + +function decodeChunk(state, chunk, encoding) { + if (!state.objectMode && + state.decodeStrings !== false && + typeof chunk === 'string') { + chunk = new Buffer(chunk, encoding); + } + return chunk; +} + +// if we're already writing something, then just put this +// in the queue, and wait our turn. Otherwise, call _write +// If we return false, then we need a drain event, so set that flag. +function writeOrBuffer(stream, state, chunk, encoding, cb) { + chunk = decodeChunk(state, chunk, encoding); + if (Buffer.isBuffer(chunk)) + encoding = 'buffer'; + var len = state.objectMode ? 1 : chunk.length; + + state.length += len; + + var ret = state.length < state.highWaterMark; + // we must ensure that previous needDrain will not be reset to false. + if (!ret) + state.needDrain = true; + + if (state.writing) + state.buffer.push(new WriteReq(chunk, encoding, cb)); + else + doWrite(stream, state, len, chunk, encoding, cb); + + return ret; +} + +function doWrite(stream, state, len, chunk, encoding, cb) { + state.writelen = len; + state.writecb = cb; + state.writing = true; + state.sync = true; + stream._write(chunk, encoding, state.onwrite); + state.sync = false; +} + +function onwriteError(stream, state, sync, er, cb) { + if (sync) + process.nextTick(function() { + cb(er); + }); + else + cb(er); + + stream._writableState.errorEmitted = true; + stream.emit('error', er); +} + +function onwriteStateUpdate(state) { + state.writing = false; + state.writecb = null; + state.length -= state.writelen; + state.writelen = 0; +} + +function onwrite(stream, er) { + var state = stream._writableState; + var sync = state.sync; + var cb = state.writecb; + + onwriteStateUpdate(state); + + if (er) + onwriteError(stream, state, sync, er, cb); + else { + // Check if we're actually ready to finish, but don't emit yet + var finished = needFinish(stream, state); + + if (!finished && !state.bufferProcessing && state.buffer.length) + clearBuffer(stream, state); + + if (sync) { + process.nextTick(function() { + afterWrite(stream, state, finished, cb); + }); + } else { + afterWrite(stream, state, finished, cb); + } + } +} + +function afterWrite(stream, state, finished, cb) { + if (!finished) + onwriteDrain(stream, state); + cb(); + if (finished) + finishMaybe(stream, state); +} + +// Must force callback to be called on nextTick, so that we don't +// emit 'drain' before the write() consumer gets the 'false' return +// value, and has a chance to attach a 'drain' listener. +function onwriteDrain(stream, state) { + if (state.length === 0 && state.needDrain) { + state.needDrain = false; + stream.emit('drain'); + } +} + + +// if there's something in the buffer waiting, then process it +function clearBuffer(stream, state) { + state.bufferProcessing = true; + + for (var c = 0; c < state.buffer.length; c++) { + var entry = state.buffer[c]; + var chunk = entry.chunk; + var encoding = entry.encoding; + var cb = entry.callback; + var len = state.objectMode ? 1 : chunk.length; + + doWrite(stream, state, len, chunk, encoding, cb); + + // if we didn't call the onwrite immediately, then + // it means that we need to wait until it does. + // also, that means that the chunk and cb are currently + // being processed, so move the buffer counter past them. + if (state.writing) { + c++; + break; + } + } + + state.bufferProcessing = false; + if (c < state.buffer.length) + state.buffer = state.buffer.slice(c); + else + state.buffer.length = 0; +} + +Writable.prototype._write = function(chunk, encoding, cb) { + cb(new Error('not implemented')); +}; + +Writable.prototype.end = function(chunk, encoding, cb) { + var state = this._writableState; + + if (typeof chunk === 'function') { + cb = chunk; + chunk = null; + encoding = null; + } else if (typeof encoding === 'function') { + cb = encoding; + encoding = null; + } + + if (typeof chunk !== 'undefined' && chunk !== null) + this.write(chunk, encoding); + + // ignore unnecessary end() calls. + if (!state.ending && !state.finished) + endWritable(this, state, cb); +}; + + +function needFinish(stream, state) { + return (state.ending && + state.length === 0 && + !state.finished && + !state.writing); +} + +function finishMaybe(stream, state) { + var need = needFinish(stream, state); + if (need) { + state.finished = true; + stream.emit('finish'); + } + return need; +} + +function endWritable(stream, state, cb) { + state.ending = true; + finishMaybe(stream, state); + if (cb) { + if (state.finished) + process.nextTick(cb); + else + stream.once('finish', cb); + } + state.ended = true; +} + +}).call(this,require('_process')) +},{"./_stream_duplex":12,"_process":94,"buffer":7,"core-util-is":19,"inherits":47,"stream":111}],17:[function(require,module,exports){ +(function (process){ +var Stream = require('stream'); // hack to fix a circular dependency issue when used with browserify +exports = module.exports = require('./lib/_stream_readable.js'); +exports.Stream = Stream; +exports.Readable = exports; +exports.Writable = require('./lib/_stream_writable.js'); +exports.Duplex = require('./lib/_stream_duplex.js'); +exports.Transform = require('./lib/_stream_transform.js'); +exports.PassThrough = require('./lib/_stream_passthrough.js'); +if (!process.browser && process.env.READABLE_STREAM === 'disable') { + module.exports = require('stream'); +} + +}).call(this,require('_process')) +},{"./lib/_stream_duplex.js":12,"./lib/_stream_passthrough.js":13,"./lib/_stream_readable.js":14,"./lib/_stream_transform.js":15,"./lib/_stream_writable.js":16,"_process":94,"stream":111}],18:[function(require,module,exports){ +// Copyright Joyent, Inc. and other Node contributors. +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the +// "Software"), to deal in the Software without restriction, including +// without limitation the rights to use, copy, modify, merge, publish, +// distribute, sublicense, and/or sell copies of the Software, and to permit +// persons to whom the Software is furnished to do so, subject to the +// following conditions: +// +// The above copyright notice and this permission notice shall be included +// in all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN +// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, +// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR +// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE +// USE OR OTHER DEALINGS IN THE SOFTWARE. + +var Buffer = require('buffer').Buffer; + +var isBufferEncoding = Buffer.isEncoding + || function(encoding) { + switch (encoding && encoding.toLowerCase()) { + case 'hex': case 'utf8': case 'utf-8': case 'ascii': case 'binary': case 'base64': case 'ucs2': case 'ucs-2': case 'utf16le': case 'utf-16le': case 'raw': return true; + default: return false; + } + } + + +function assertEncoding(encoding) { + if (encoding && !isBufferEncoding(encoding)) { + throw new Error('Unknown encoding: ' + encoding); + } +} + +// StringDecoder provides an interface for efficiently splitting a series of +// buffers into a series of JS strings without breaking apart multi-byte +// characters. CESU-8 is handled as part of the UTF-8 encoding. +// +// @TODO Handling all encodings inside a single object makes it very difficult +// to reason about this code, so it should be split up in the future. +// @TODO There should be a utf8-strict encoding that rejects invalid UTF-8 code +// points as used by CESU-8. +var StringDecoder = exports.StringDecoder = function(encoding) { + this.encoding = (encoding || 'utf8').toLowerCase().replace(/[-_]/, ''); + assertEncoding(encoding); + switch (this.encoding) { + case 'utf8': + // CESU-8 represents each of Surrogate Pair by 3-bytes + this.surrogateSize = 3; + break; + case 'ucs2': + case 'utf16le': + // UTF-16 represents each of Surrogate Pair by 2-bytes + this.surrogateSize = 2; + this.detectIncompleteChar = utf16DetectIncompleteChar; + break; + case 'base64': + // Base-64 stores 3 bytes in 4 chars, and pads the remainder. + this.surrogateSize = 3; + this.detectIncompleteChar = base64DetectIncompleteChar; + break; + default: + this.write = passThroughWrite; + return; + } + + // Enough space to store all bytes of a single character. UTF-8 needs 4 + // bytes, but CESU-8 may require up to 6 (3 bytes per surrogate). + this.charBuffer = new Buffer(6); + // Number of bytes received for the current incomplete multi-byte character. + this.charReceived = 0; + // Number of bytes expected for the current incomplete multi-byte character. + this.charLength = 0; +}; + + +// write decodes the given buffer and returns it as JS string that is +// guaranteed to not contain any partial multi-byte characters. Any partial +// character found at the end of the buffer is buffered up, and will be +// returned when calling write again with the remaining bytes. +// +// Note: Converting a Buffer containing an orphan surrogate to a String +// currently works, but converting a String to a Buffer (via `new Buffer`, or +// Buffer#write) will replace incomplete surrogates with the unicode +// replacement character. See https://codereview.chromium.org/121173009/ . +StringDecoder.prototype.write = function(buffer) { + var charStr = ''; + // if our last write ended with an incomplete multibyte character + while (this.charLength) { + // determine how many remaining bytes this buffer has to offer for this char + var available = (buffer.length >= this.charLength - this.charReceived) ? + this.charLength - this.charReceived : + buffer.length; + + // add the new bytes to the char buffer + buffer.copy(this.charBuffer, this.charReceived, 0, available); + this.charReceived += available; + + if (this.charReceived < this.charLength) { + // still not enough chars in this buffer? wait for more ... + return ''; + } + + // remove bytes belonging to the current character from the buffer + buffer = buffer.slice(available, buffer.length); + + // get the character that was split + charStr = this.charBuffer.slice(0, this.charLength).toString(this.encoding); + + // CESU-8: lead surrogate (D800-DBFF) is also the incomplete character + var charCode = charStr.charCodeAt(charStr.length - 1); + if (charCode >= 0xD800 && charCode <= 0xDBFF) { + this.charLength += this.surrogateSize; + charStr = ''; + continue; + } + this.charReceived = this.charLength = 0; + + // if there are no more bytes in this buffer, just emit our char + if (buffer.length === 0) { + return charStr; + } + break; + } + + // determine and set charLength / charReceived + this.detectIncompleteChar(buffer); + + var end = buffer.length; + if (this.charLength) { + // buffer the incomplete character bytes we got + buffer.copy(this.charBuffer, 0, buffer.length - this.charReceived, end); + end -= this.charReceived; + } + + charStr += buffer.toString(this.encoding, 0, end); + + var end = charStr.length - 1; + var charCode = charStr.charCodeAt(end); + // CESU-8: lead surrogate (D800-DBFF) is also the incomplete character + if (charCode >= 0xD800 && charCode <= 0xDBFF) { + var size = this.surrogateSize; + this.charLength += size; + this.charReceived += size; + this.charBuffer.copy(this.charBuffer, size, 0, size); + buffer.copy(this.charBuffer, 0, 0, size); + return charStr.substring(0, end); + } + + // or just emit the charStr + return charStr; +}; + +// detectIncompleteChar determines if there is an incomplete UTF-8 character at +// the end of the given buffer. If so, it sets this.charLength to the byte +// length that character, and sets this.charReceived to the number of bytes +// that are available for this character. +StringDecoder.prototype.detectIncompleteChar = function(buffer) { + // determine how many bytes we have to check at the end of this buffer + var i = (buffer.length >= 3) ? 3 : buffer.length; + + // Figure out if one of the last i bytes of our buffer announces an + // incomplete char. + for (; i > 0; i--) { + var c = buffer[buffer.length - i]; + + // See http://en.wikipedia.org/wiki/UTF-8#Description + + // 110XXXXX + if (i == 1 && c >> 5 == 0x06) { + this.charLength = 2; + break; + } + + // 1110XXXX + if (i <= 2 && c >> 4 == 0x0E) { + this.charLength = 3; + break; + } + + // 11110XXX + if (i <= 3 && c >> 3 == 0x1E) { + this.charLength = 4; + break; + } + } + this.charReceived = i; +}; + +StringDecoder.prototype.end = function(buffer) { + var res = ''; + if (buffer && buffer.length) + res = this.write(buffer); + + if (this.charReceived) { + var cr = this.charReceived; + var buf = this.charBuffer; + var enc = this.encoding; + res += buf.slice(0, cr).toString(enc); + } + + return res; +}; + +function passThroughWrite(buffer) { + return buffer.toString(this.encoding); +} + +function utf16DetectIncompleteChar(buffer) { + this.charReceived = buffer.length % 2; + this.charLength = this.charReceived ? 2 : 0; +} + +function base64DetectIncompleteChar(buffer) { + this.charReceived = buffer.length % 3; + this.charLength = this.charReceived ? 3 : 0; +} + +},{"buffer":7}],19:[function(require,module,exports){ (function (Buffer){ // Copyright Joyent, Inc. and other Node contributors. // @@ -2846,566 +5377,562 @@ function objectToString(o) { } }).call(this,{"isBuffer":require("../../is-buffer/index.js")}) -},{"../../is-buffer/index.js":49}],8:[function(require,module,exports){ -"use strict" +},{"../../is-buffer/index.js":49}],20:[function(require,module,exports){ +"use strict" + +var createThunk = require("./lib/thunk.js") + +function Procedure() { + this.argTypes = [] + this.shimArgs = [] + this.arrayArgs = [] + this.arrayBlockIndices = [] + this.scalarArgs = [] + this.offsetArgs = [] + this.offsetArgIndex = [] + this.indexArgs = [] + this.shapeArgs = [] + this.funcName = "" + this.pre = null + this.body = null + this.post = null + this.debug = false +} + +function compileCwise(user_args) { + //Create procedure + var proc = new Procedure() + + //Parse blocks + proc.pre = user_args.pre + proc.body = user_args.body + proc.post = user_args.post + + //Parse arguments + var proc_args = user_args.args.slice(0) + proc.argTypes = proc_args + for(var i=0; i0) { + throw new Error("cwise: pre() block may not reference array args") + } + if(i < proc.post.args.length && proc.post.args[i].count>0) { + throw new Error("cwise: post() block may not reference array args") + } + } else if(arg_type === "scalar") { + proc.scalarArgs.push(i) + proc.shimArgs.push("scalar" + i) + } else if(arg_type === "index") { + proc.indexArgs.push(i) + if(i < proc.pre.args.length && proc.pre.args[i].count > 0) { + throw new Error("cwise: pre() block may not reference array index") + } + if(i < proc.body.args.length && proc.body.args[i].lvalue) { + throw new Error("cwise: body() block may not write to array index") + } + if(i < proc.post.args.length && proc.post.args[i].count > 0) { + throw new Error("cwise: post() block may not reference array index") + } + } else if(arg_type === "shape") { + proc.shapeArgs.push(i) + if(i < proc.pre.args.length && proc.pre.args[i].lvalue) { + throw new Error("cwise: pre() block may not write to array shape") + } + if(i < proc.body.args.length && proc.body.args[i].lvalue) { + throw new Error("cwise: body() block may not write to array shape") + } + if(i < proc.post.args.length && proc.post.args[i].lvalue) { + throw new Error("cwise: post() block may not write to array shape") + } + } else if(typeof arg_type === "object" && arg_type.offset) { + proc.argTypes[i] = "offset" + proc.offsetArgs.push({ array: arg_type.array, offset:arg_type.offset }) + proc.offsetArgIndex.push(i) + } else { + throw new Error("cwise: Unknown argument type " + proc_args[i]) + } + } + + //Make sure at least one array argument was specified + if(proc.arrayArgs.length <= 0) { + throw new Error("cwise: No array arguments specified") + } + + //Make sure arguments are correct + if(proc.pre.args.length > proc_args.length) { + throw new Error("cwise: Too many arguments in pre() block") + } + if(proc.body.args.length > proc_args.length) { + throw new Error("cwise: Too many arguments in body() block") + } + if(proc.post.args.length > proc_args.length) { + throw new Error("cwise: Too many arguments in post() block") + } + + //Check debug flag + proc.debug = !!user_args.printCode || !!user_args.debug + + //Retrieve name + proc.funcName = user_args.funcName || "cwise" + + //Read in block size + proc.blockSize = user_args.blockSize || 64 + + return createThunk(proc) +} + +module.exports = compileCwise -var createThunk = require("./lib/thunk.js") +},{"./lib/thunk.js":22}],21:[function(require,module,exports){ +"use strict" + +var uniq = require("uniq") + +// This function generates very simple loops analogous to how you typically traverse arrays (the outermost loop corresponds to the slowest changing index, the innermost loop to the fastest changing index) +// TODO: If two arrays have the same strides (and offsets) there is potential for decreasing the number of "pointers" and related variables. The drawback is that the type signature would become more specific and that there would thus be less potential for caching, but it might still be worth it, especially when dealing with large numbers of arguments. +function innerFill(order, proc, body) { + var dimension = order.length + , nargs = proc.arrayArgs.length + , has_index = proc.indexArgs.length>0 + , code = [] + , vars = [] + , idx=0, pidx=0, i, j + for(i=0; i=0; --i) { // Start at largest stride and work your way inwards + idx = order[i] + code.push(["for(i",i,"=0;i",i," 0) { + code.push(["index[",pidx,"]-=s",pidx].join("")) + } + code.push(["++index[",idx,"]"].join("")) + } + code.push("}") + } + return code.join("\n") +} + +// Generate "outer" loops that loop over blocks of data, applying "inner" loops to the blocks by manipulating the local variables in such a way that the inner loop only "sees" the current block. +// TODO: If this is used, then the previous declaration (done by generateCwiseOp) of s* is essentially unnecessary. +// I believe the s* are not used elsewhere (in particular, I don't think they're used in the pre/post parts and "shape" is defined independently), so it would be possible to make defining the s* dependent on what loop method is being used. +function outerFill(matched, order, proc, body) { + var dimension = order.length + , nargs = proc.arrayArgs.length + , blockSize = proc.blockSize + , has_index = proc.indexArgs.length > 0 + , code = [] + for(var i=0; i0;){"].join("")) // Iterate back to front + code.push(["if(j",i,"<",blockSize,"){"].join("")) // Either decrease j by blockSize (s = blockSize), or set it to zero (after setting s = j). + code.push(["s",order[i],"=j",i].join("")) + code.push(["j",i,"=0"].join("")) + code.push(["}else{s",order[i],"=",blockSize].join("")) + code.push(["j",i,"-=",blockSize,"}"].join("")) + if(has_index) { + code.push(["index[",order[i],"]=j",i].join("")) + } + } + for(var i=0; i 0) { + allEqual = allEqual && summary[i] === summary[i-1] + } + } + if(allEqual) { + return summary[0] + } + return summary.join("") +} + +//Generates a cwise operator +function generateCWiseOp(proc, typesig) { + + //Compute dimension + // Arrays get put first in typesig, and there are two entries per array (dtype and order), so this gets the number of dimensions in the first array arg. + var dimension = (typesig[1].length - Math.abs(proc.arrayBlockIndices[0]))|0 + var orders = new Array(proc.arrayArgs.length) + var dtypes = new Array(proc.arrayArgs.length) + for(var i=0; i 0) { + vars.push("shape=SS.slice(0)") // Makes the shape over which we iterate available to the user defined functions (so you can use width/height for example) + } + if(proc.indexArgs.length > 0) { + // Prepare an array to keep track of the (logical) indices, initialized to dimension zeroes. + var zeros = new Array(dimension) + for(var i=0; i 3) { + code.push(processBlock(proc.pre, proc, dtypes)) + } + + //Process body + var body = processBlock(proc.body, proc, dtypes) + var matched = countMatches(loopOrders) + if(matched < dimension) { + code.push(outerFill(matched, loopOrders[0], proc, body)) // TODO: Rather than passing loopOrders[0], it might be interesting to look at passing an order that represents the majority of the arguments for example. + } else { + code.push(innerFill(loopOrders[0], proc, body)) + } + + //Inline epilog + if(proc.post.body.length > 3) { + code.push(processBlock(proc.post, proc, dtypes)) + } + + if(proc.debug) { + console.log("-----Generated cwise routine for ", typesig, ":\n" + code.join("\n") + "\n----------") + } + + var loopName = [(proc.funcName||"unnamed"), "_cwise_loop_", orders[0].join("s"),"m",matched,typeSummary(dtypes)].join("") + var f = new Function(["function ",loopName,"(", arglist.join(","),"){", code.join("\n"),"} return ", loopName].join("")) + return f() +} +module.exports = generateCWiseOp -function Procedure() { - this.argTypes = [] - this.shimArgs = [] - this.arrayArgs = [] - this.arrayBlockIndices = [] - this.scalarArgs = [] - this.offsetArgs = [] - this.offsetArgIndex = [] - this.indexArgs = [] - this.shapeArgs = [] - this.funcName = "" - this.pre = null - this.body = null - this.post = null - this.debug = false -} +},{"uniq":114}],22:[function(require,module,exports){ +"use strict" + +// The function below is called when constructing a cwise function object, and does the following: +// A function object is constructed which accepts as argument a compilation function and returns another function. +// It is this other function that is eventually returned by createThunk, and this function is the one that actually +// checks whether a certain pattern of arguments has already been used before and compiles new loops as needed. +// The compilation passed to the first function object is used for compiling new functions. +// Once this function object is created, it is called with compile as argument, where the first argument of compile +// is bound to "proc" (essentially containing a preprocessed version of the user arguments to cwise). +// So createThunk roughly works like this: +// function createThunk(proc) { +// var thunk = function(compileBound) { +// var CACHED = {} +// return function(arrays and scalars) { +// if (dtype and order of arrays in CACHED) { +// var func = CACHED[dtype and order of arrays] +// } else { +// var func = CACHED[dtype and order of arrays] = compileBound(dtype and order of arrays) +// } +// return func(arrays and scalars) +// } +// } +// return thunk(compile.bind1(proc)) +// } + +var compile = require("./compile.js") + +function createThunk(proc) { + var code = ["'use strict'", "var CACHED={}"] + var vars = [] + var thunkName = proc.funcName + "_cwise_thunk" + + //Build thunk + code.push(["return function ", thunkName, "(", proc.shimArgs.join(","), "){"].join("")) + var typesig = [] + var string_typesig = [] + var proc_args = [["array",proc.arrayArgs[0],".shape.slice(", // Slice shape so that we only retain the shape over which we iterate (which gets passed to the cwise operator as SS). + Math.max(0,proc.arrayBlockIndices[0]),proc.arrayBlockIndices[0]<0?(","+proc.arrayBlockIndices[0]+")"):")"].join("")] + var shapeLengthConditions = [], shapeConditions = [] + // Process array arguments + for(var i=0; i0) { // Gather conditions to check for shape equality (ignoring block indices) + shapeLengthConditions.push("array" + proc.arrayArgs[0] + ".shape.length===array" + j + ".shape.length+" + (Math.abs(proc.arrayBlockIndices[0])-Math.abs(proc.arrayBlockIndices[i]))) + shapeConditions.push("array" + proc.arrayArgs[0] + ".shape[shapeIndex+" + Math.max(0,proc.arrayBlockIndices[0]) + "]===array" + j + ".shape[shapeIndex+" + Math.max(0,proc.arrayBlockIndices[i]) + "]") + } + } + // Check for shape equality + if (proc.arrayArgs.length > 1) { + code.push("if (!(" + shapeLengthConditions.join(" && ") + ")) throw new Error('cwise: Arrays do not all have the same dimensionality!')") + code.push("for(var shapeIndex=array" + proc.arrayArgs[0] + ".shape.length-" + Math.abs(proc.arrayBlockIndices[0]) + "; shapeIndex-->0;) {") + code.push("if (!(" + shapeConditions.join(" && ") + ")) throw new Error('cwise: Arrays do not all have the same shape!')") + code.push("}") + } + // Process scalar arguments + for(var i=0; i0) { - throw new Error("cwise: pre() block may not reference array args") - } - if(i < proc.post.args.length && proc.post.args[i].count>0) { - throw new Error("cwise: post() block may not reference array args") - } - } else if(arg_type === "scalar") { - proc.scalarArgs.push(i) - proc.shimArgs.push("scalar" + i) - } else if(arg_type === "index") { - proc.indexArgs.push(i) - if(i < proc.pre.args.length && proc.pre.args[i].count > 0) { - throw new Error("cwise: pre() block may not reference array index") - } - if(i < proc.body.args.length && proc.body.args[i].lvalue) { - throw new Error("cwise: body() block may not write to array index") - } - if(i < proc.post.args.length && proc.post.args[i].count > 0) { - throw new Error("cwise: post() block may not reference array index") - } - } else if(arg_type === "shape") { - proc.shapeArgs.push(i) - if(i < proc.pre.args.length && proc.pre.args[i].lvalue) { - throw new Error("cwise: pre() block may not write to array shape") - } - if(i < proc.body.args.length && proc.body.args[i].lvalue) { - throw new Error("cwise: body() block may not write to array shape") - } - if(i < proc.post.args.length && proc.post.args[i].lvalue) { - throw new Error("cwise: post() block may not write to array shape") - } - } else if(typeof arg_type === "object" && arg_type.offset) { - proc.argTypes[i] = "offset" - proc.offsetArgs.push({ array: arg_type.array, offset:arg_type.offset }) - proc.offsetArgIndex.push(i) - } else { - throw new Error("cwise: Unknown argument type " + proc_args[i]) - } - } - - //Make sure at least one array argument was specified - if(proc.arrayArgs.length <= 0) { - throw new Error("cwise: No array arguments specified") - } - - //Make sure arguments are correct - if(proc.pre.args.length > proc_args.length) { - throw new Error("cwise: Too many arguments in pre() block") - } - if(proc.body.args.length > proc_args.length) { - throw new Error("cwise: Too many arguments in body() block") - } - if(proc.post.args.length > proc_args.length) { - throw new Error("cwise: Too many arguments in post() block") - } - - //Check debug flag - proc.debug = !!user_args.printCode || !!user_args.debug - - //Retrieve name - proc.funcName = user_args.funcName || "cwise" - - //Read in block size - proc.blockSize = user_args.blockSize || 64 - - return createThunk(proc) -} - -module.exports = compileCwise - -},{"./lib/thunk.js":10}],9:[function(require,module,exports){ -"use strict" - -var uniq = require("uniq") - -// This function generates very simple loops analogous to how you typically traverse arrays (the outermost loop corresponds to the slowest changing index, the innermost loop to the fastest changing index) -// TODO: If two arrays have the same strides (and offsets) there is potential for decreasing the number of "pointers" and related variables. The drawback is that the type signature would become more specific and that there would thus be less potential for caching, but it might still be worth it, especially when dealing with large numbers of arguments. -function innerFill(order, proc, body) { - var dimension = order.length - , nargs = proc.arrayArgs.length - , has_index = proc.indexArgs.length>0 - , code = [] - , vars = [] - , idx=0, pidx=0, i, j - for(i=0; i 0) { - code.push("var " + vars.join(",")) - } - //Scan loop - for(i=dimension-1; i>=0; --i) { // Start at largest stride and work your way inwards - idx = order[i] - code.push(["for(i",i,"=0;i",i," 0) { - code.push(["index[",pidx,"]-=s",pidx].join("")) - } - code.push(["++index[",idx,"]"].join("")) - } - code.push("}") - } - return code.join("\n") -} - -// Generate "outer" loops that loop over blocks of data, applying "inner" loops to the blocks by manipulating the local variables in such a way that the inner loop only "sees" the current block. -// TODO: If this is used, then the previous declaration (done by generateCwiseOp) of s* is essentially unnecessary. -// I believe the s* are not used elsewhere (in particular, I don't think they're used in the pre/post parts and "shape" is defined independently), so it would be possible to make defining the s* dependent on what loop method is being used. -function outerFill(matched, order, proc, body) { - var dimension = order.length - , nargs = proc.arrayArgs.length - , blockSize = proc.blockSize - , has_index = proc.indexArgs.length > 0 - , code = [] - for(var i=0; i0;){"].join("")) // Iterate back to front - code.push(["if(j",i,"<",blockSize,"){"].join("")) // Either decrease j by blockSize (s = blockSize), or set it to zero (after setting s = j). - code.push(["s",order[i],"=j",i].join("")) - code.push(["j",i,"=0"].join("")) - code.push(["}else{s",order[i],"=",blockSize].join("")) - code.push(["j",i,"-=",blockSize,"}"].join("")) - if(has_index) { - code.push(["index[",order[i],"]=j",i].join("")) - } - } - for(var i=0; i 0) { - allEqual = allEqual && summary[i] === summary[i-1] - } - } - if(allEqual) { - return summary[0] - } - return summary.join("") -} - -//Generates a cwise operator -function generateCWiseOp(proc, typesig) { - - //Compute dimension - // Arrays get put first in typesig, and there are two entries per array (dtype and order), so this gets the number of dimensions in the first array arg. - var dimension = (typesig[1].length - Math.abs(proc.arrayBlockIndices[0]))|0 - var orders = new Array(proc.arrayArgs.length) - var dtypes = new Array(proc.arrayArgs.length) - for(var i=0; i 0) { - vars.push("shape=SS.slice(0)") // Makes the shape over which we iterate available to the user defined functions (so you can use width/height for example) - } - if(proc.indexArgs.length > 0) { - // Prepare an array to keep track of the (logical) indices, initialized to dimension zeroes. - var zeros = new Array(dimension) - for(var i=0; i 0) { - code.push("var " + vars.join(",")) - } - for(var i=0; i 3) { - code.push(processBlock(proc.pre, proc, dtypes)) - } - - //Process body - var body = processBlock(proc.body, proc, dtypes) - var matched = countMatches(loopOrders) - if(matched < dimension) { - code.push(outerFill(matched, loopOrders[0], proc, body)) // TODO: Rather than passing loopOrders[0], it might be interesting to look at passing an order that represents the majority of the arguments for example. - } else { - code.push(innerFill(loopOrders[0], proc, body)) - } - - //Inline epilog - if(proc.post.body.length > 3) { - code.push(processBlock(proc.post, proc, dtypes)) - } - - if(proc.debug) { - console.log("-----Generated cwise routine for ", typesig, ":\n" + code.join("\n") + "\n----------") - } - - var loopName = [(proc.funcName||"unnamed"), "_cwise_loop_", orders[0].join("s"),"m",matched,typeSummary(dtypes)].join("") - var f = new Function(["function ",loopName,"(", arglist.join(","),"){", code.join("\n"),"} return ", loopName].join("")) - return f() -} -module.exports = generateCWiseOp - -},{"uniq":124}],10:[function(require,module,exports){ -"use strict" - -// The function below is called when constructing a cwise function object, and does the following: -// A function object is constructed which accepts as argument a compilation function and returns another function. -// It is this other function that is eventually returned by createThunk, and this function is the one that actually -// checks whether a certain pattern of arguments has already been used before and compiles new loops as needed. -// The compilation passed to the first function object is used for compiling new functions. -// Once this function object is created, it is called with compile as argument, where the first argument of compile -// is bound to "proc" (essentially containing a preprocessed version of the user arguments to cwise). -// So createThunk roughly works like this: -// function createThunk(proc) { -// var thunk = function(compileBound) { -// var CACHED = {} -// return function(arrays and scalars) { -// if (dtype and order of arrays in CACHED) { -// var func = CACHED[dtype and order of arrays] -// } else { -// var func = CACHED[dtype and order of arrays] = compileBound(dtype and order of arrays) -// } -// return func(arrays and scalars) -// } -// } -// return thunk(compile.bind1(proc)) -// } - -var compile = require("./compile.js") - -function createThunk(proc) { - var code = ["'use strict'", "var CACHED={}"] - var vars = [] - var thunkName = proc.funcName + "_cwise_thunk" - - //Build thunk - code.push(["return function ", thunkName, "(", proc.shimArgs.join(","), "){"].join("")) - var typesig = [] - var string_typesig = [] - var proc_args = [["array",proc.arrayArgs[0],".shape.slice(", // Slice shape so that we only retain the shape over which we iterate (which gets passed to the cwise operator as SS). - Math.max(0,proc.arrayBlockIndices[0]),proc.arrayBlockIndices[0]<0?(","+proc.arrayBlockIndices[0]+")"):")"].join("")] - var shapeLengthConditions = [], shapeConditions = [] - // Process array arguments - for(var i=0; i0) { // Gather conditions to check for shape equality (ignoring block indices) - shapeLengthConditions.push("array" + proc.arrayArgs[0] + ".shape.length===array" + j + ".shape.length+" + (Math.abs(proc.arrayBlockIndices[0])-Math.abs(proc.arrayBlockIndices[i]))) - shapeConditions.push("array" + proc.arrayArgs[0] + ".shape[shapeIndex+" + Math.max(0,proc.arrayBlockIndices[0]) + "]===array" + j + ".shape[shapeIndex+" + Math.max(0,proc.arrayBlockIndices[i]) + "]") - } - } - // Check for shape equality - if (proc.arrayArgs.length > 1) { - code.push("if (!(" + shapeLengthConditions.join(" && ") + ")) throw new Error('cwise: Arrays do not all have the same dimensionality!')") - code.push("for(var shapeIndex=array" + proc.arrayArgs[0] + ".shape.length-" + Math.abs(proc.arrayBlockIndices[0]) + "; shapeIndex-->0;) {") - code.push("if (!(" + shapeConditions.join(" && ") + ")) throw new Error('cwise: Arrays do not all have the same shape!')") - code.push("}") - } - // Process scalar arguments - for(var i=0; i*/ -var objectKeys = Object.keys || function (obj) { - var keys = []; - for (var key in obj) keys.push(key); - return keys; -} -/**/ - - -/**/ -var util = require('core-util-is'); -util.inherits = require('inherits'); -/**/ - -var Readable = require('./_stream_readable'); -var Writable = require('./_stream_writable'); - -util.inherits(Duplex, Readable); - -forEach(objectKeys(Writable.prototype), function(method) { - if (!Duplex.prototype[method]) - Duplex.prototype[method] = Writable.prototype[method]; -}); - -function Duplex(options) { - if (!(this instanceof Duplex)) - return new Duplex(options); - - Readable.call(this, options); - Writable.call(this, options); - - if (options && options.readable === false) - this.readable = false; - - if (options && options.writable === false) - this.writable = false; - - this.allowHalfOpen = true; - if (options && options.allowHalfOpen === false) - this.allowHalfOpen = false; - - this.once('end', onend); -} - -// the no-half-open enforcer -function onend() { - // if we allow half-open state, or if the writable side ended, - // then we're ok. - if (this.allowHalfOpen || this._writableState.ended) - return; - - // no more data can be written. - // But allow more writes to happen in this tick. - process.nextTick(this.end.bind(this)); -} - -function forEach (xs, f) { - for (var i = 0, l = xs.length; i < l; i++) { - f(xs[i], i); - } -} - -}).call(this,require('_process')) -},{"./_stream_readable":28,"./_stream_writable":30,"_process":94,"core-util-is":7,"inherits":47}],27:[function(require,module,exports){ -// Copyright Joyent, Inc. and other Node contributors. -// -// Permission is hereby granted, free of charge, to any person obtaining a -// copy of this software and associated documentation files (the -// "Software"), to deal in the Software without restriction, including -// without limitation the rights to use, copy, modify, merge, publish, -// distribute, sublicense, and/or sell copies of the Software, and to permit -// persons to whom the Software is furnished to do so, subject to the -// following conditions: -// -// The above copyright notice and this permission notice shall be included -// in all copies or substantial portions of the Software. -// -// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS -// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF -// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN -// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, -// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR -// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE -// USE OR OTHER DEALINGS IN THE SOFTWARE. - -// a passthrough stream. -// basically just the most minimal sort of Transform stream. -// Every written chunk gets output as-is. - -module.exports = PassThrough; - -var Transform = require('./_stream_transform'); - -/**/ -var util = require('core-util-is'); -util.inherits = require('inherits'); -/**/ - -util.inherits(PassThrough, Transform); - -function PassThrough(options) { - if (!(this instanceof PassThrough)) - return new PassThrough(options); - - Transform.call(this, options); -} - -PassThrough.prototype._transform = function(chunk, encoding, cb) { - cb(null, chunk); -}; - -},{"./_stream_transform":29,"core-util-is":7,"inherits":47}],28:[function(require,module,exports){ +},{}],38:[function(require,module,exports){ +arguments[4][11][0].apply(exports,arguments) +},{"dup":11}],39:[function(require,module,exports){ +arguments[4][12][0].apply(exports,arguments) +},{"./_stream_readable":41,"./_stream_writable":43,"_process":94,"core-util-is":19,"dup":12,"inherits":47}],40:[function(require,module,exports){ +arguments[4][13][0].apply(exports,arguments) +},{"./_stream_transform":42,"core-util-is":19,"dup":13,"inherits":47}],41:[function(require,module,exports){ (function (process){ // Copyright Joyent, Inc. and other Node contributors. // @@ -6680,7 +9072,7 @@ function indexOf (xs, x) { } }).call(this,require('_process')) -},{"./_stream_duplex":26,"_process":94,"buffer":5,"core-util-is":7,"events":12,"inherits":47,"isarray":50,"stream":106,"string_decoder/":122,"util":2}],29:[function(require,module,exports){ +},{"./_stream_duplex":39,"_process":94,"buffer":7,"core-util-is":19,"events":24,"inherits":47,"isarray":38,"stream":111,"string_decoder/":45,"util":3}],42:[function(require,module,exports){ // Copyright Joyent, Inc. and other Node contributors. // // Permission is hereby granted, free of charge, to any person obtaining a @@ -6891,7 +9283,7 @@ function done(stream, er) { return stream.push(null); } -},{"./_stream_duplex":26,"core-util-is":7,"inherits":47}],30:[function(require,module,exports){ +},{"./_stream_duplex":39,"core-util-is":19,"inherits":47}],43:[function(require,module,exports){ (function (process){ // Copyright Joyent, Inc. and other Node contributors. // @@ -7372,7 +9764,7 @@ function endWritable(stream, state, cb) { } }).call(this,require('_process')) -},{"./_stream_duplex":26,"_process":94,"buffer":5,"core-util-is":7,"inherits":47,"stream":106}],31:[function(require,module,exports){ +},{"./_stream_duplex":39,"_process":94,"buffer":7,"core-util-is":19,"inherits":47,"stream":111}],44:[function(require,module,exports){ (function (process){ exports = module.exports = require('./lib/_stream_readable.js'); exports.Stream = require('stream'); @@ -7386,3011 +9778,9 @@ if (!process.browser && process.env.READABLE_STREAM === 'disable') { } }).call(this,require('_process')) -},{"./lib/_stream_duplex.js":26,"./lib/_stream_passthrough.js":27,"./lib/_stream_readable.js":28,"./lib/_stream_transform.js":29,"./lib/_stream_writable.js":30,"_process":94,"stream":106}],32:[function(require,module,exports){ -(function (global){ -'use strict'; - -// compare and isBuffer taken from https://github.com/feross/buffer/blob/680e9e5e488f22aac27599a57dc844a6315928dd/index.js -// original notice: - -/*! - * The buffer module from node.js, for the browser. - * - * @author Feross Aboukhadijeh - * @license MIT - */ -function compare(a, b) { - 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; -} -function isBuffer(b) { - if (global.Buffer && typeof global.Buffer.isBuffer === 'function') { - return global.Buffer.isBuffer(b); - } - return !!(b != null && b._isBuffer); -} - -// based on node assert, original notice: - -// http://wiki.commonjs.org/wiki/Unit_Testing/1.0 -// -// THIS IS NOT TESTED NOR LIKELY TO WORK OUTSIDE V8! -// -// Originally from narwhal.js (http://narwhaljs.org) -// Copyright (c) 2009 Thomas Robinson <280north.com> -// -// Permission is hereby granted, free of charge, to any person obtaining a copy -// of this software and associated documentation files (the 'Software'), to -// deal in the Software without restriction, including without limitation the -// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or -// sell copies of the Software, and to permit persons to whom the Software is -// furnished to do so, subject to the following conditions: -// -// The above copyright notice and this permission notice shall be included in -// all copies or substantial portions of the Software. -// -// THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR -// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE -// AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN -// ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION -// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - -var util = require('util/'); -var hasOwn = Object.prototype.hasOwnProperty; -var pSlice = Array.prototype.slice; -var functionsHaveNames = (function () { - return function foo() {}.name === 'foo'; -}()); -function pToString (obj) { - return Object.prototype.toString.call(obj); -} -function isView(arrbuf) { - if (isBuffer(arrbuf)) { - return false; - } - if (typeof global.ArrayBuffer !== 'function') { - return false; - } - if (typeof ArrayBuffer.isView === 'function') { - return ArrayBuffer.isView(arrbuf); - } - if (!arrbuf) { - return false; - } - if (arrbuf instanceof DataView) { - return true; - } - if (arrbuf.buffer && arrbuf.buffer instanceof ArrayBuffer) { - return true; - } - return false; -} -// 1. The assert module provides functions that throw -// AssertionError's when particular conditions are not met. The -// assert module must conform to the following interface. - -var assert = module.exports = ok; - -// 2. The AssertionError is defined in assert. -// new assert.AssertionError({ message: message, -// actual: actual, -// expected: expected }) - -var regex = /\s*function\s+([^\(\s]*)\s*/; -// based on https://github.com/ljharb/function.prototype.name/blob/adeeeec8bfcc6068b187d7d9fb3d5bb1d3a30899/implementation.js -function getName(func) { - if (!util.isFunction(func)) { - return; - } - if (functionsHaveNames) { - return func.name; - } - var str = func.toString(); - var match = str.match(regex); - return match && match[1]; -} -assert.AssertionError = function AssertionError(options) { - this.name = 'AssertionError'; - this.actual = options.actual; - this.expected = options.expected; - this.operator = options.operator; - if (options.message) { - this.message = options.message; - this.generatedMessage = false; - } else { - this.message = getMessage(this); - this.generatedMessage = true; - } - var stackStartFunction = options.stackStartFunction || fail; - if (Error.captureStackTrace) { - Error.captureStackTrace(this, stackStartFunction); - } else { - // non v8 browsers so we can have a stacktrace - var err = new Error(); - if (err.stack) { - var out = err.stack; - - // try to strip useless frames - var fn_name = getName(stackStartFunction); - var idx = out.indexOf('\n' + fn_name); - if (idx >= 0) { - // once we have located the function frame - // we need to strip out everything before it (and its line) - var next_line = out.indexOf('\n', idx + 1); - out = out.substring(next_line + 1); - } - - this.stack = out; - } - } -}; - -// assert.AssertionError instanceof Error -util.inherits(assert.AssertionError, Error); - -function truncate(s, n) { - if (typeof s === 'string') { - return s.length < n ? s : s.slice(0, n); - } else { - return s; - } -} -function inspect(something) { - if (functionsHaveNames || !util.isFunction(something)) { - return util.inspect(something); - } - var rawname = getName(something); - var name = rawname ? ': ' + rawname : ''; - return '[Function' + name + ']'; -} -function getMessage(self) { - return truncate(inspect(self.actual), 128) + ' ' + - self.operator + ' ' + - truncate(inspect(self.expected), 128); -} - -// At present only the three keys mentioned above are used and -// understood by the spec. Implementations or sub modules can pass -// other keys to the AssertionError's constructor - they will be -// ignored. - -// 3. All of the following functions must throw an AssertionError -// when a corresponding condition is not met, with a message that -// may be undefined if not provided. All assertion methods provide -// both the actual and expected values to the assertion error for -// display purposes. - -function fail(actual, expected, message, operator, stackStartFunction) { - throw new assert.AssertionError({ - message: message, - actual: actual, - expected: expected, - operator: operator, - stackStartFunction: stackStartFunction - }); -} - -// EXTENSION! allows for well behaved errors defined elsewhere. -assert.fail = fail; - -// 4. Pure assertion tests whether a value is truthy, as determined -// by !!guard. -// assert.ok(guard, message_opt); -// This statement is equivalent to assert.equal(true, !!guard, -// message_opt);. To test strictly for the value true, use -// assert.strictEqual(true, guard, message_opt);. - -function ok(value, message) { - if (!value) fail(value, true, message, '==', assert.ok); -} -assert.ok = ok; - -// 5. The equality assertion tests shallow, coercive equality with -// ==. -// assert.equal(actual, expected, message_opt); - -assert.equal = function equal(actual, expected, message) { - if (actual != expected) fail(actual, expected, message, '==', assert.equal); -}; - -// 6. The non-equality assertion tests for whether two objects are not equal -// with != assert.notEqual(actual, expected, message_opt); - -assert.notEqual = function notEqual(actual, expected, message) { - if (actual == expected) { - fail(actual, expected, message, '!=', assert.notEqual); - } -}; - -// 7. The equivalence assertion tests a deep equality relation. -// assert.deepEqual(actual, expected, message_opt); - -assert.deepEqual = function deepEqual(actual, expected, message) { - if (!_deepEqual(actual, expected, false)) { - fail(actual, expected, message, 'deepEqual', assert.deepEqual); - } -}; - -assert.deepStrictEqual = function deepStrictEqual(actual, expected, message) { - if (!_deepEqual(actual, expected, true)) { - fail(actual, expected, message, 'deepStrictEqual', assert.deepStrictEqual); - } -}; - -function _deepEqual(actual, expected, strict, memos) { - // 7.1. All identical values are equivalent, as determined by ===. - if (actual === expected) { - return true; - } else if (isBuffer(actual) && isBuffer(expected)) { - return compare(actual, expected) === 0; - - // 7.2. If the expected value is a Date object, the actual value is - // equivalent if it is also a Date object that refers to the same time. - } else if (util.isDate(actual) && util.isDate(expected)) { - return actual.getTime() === expected.getTime(); - - // 7.3 If the expected value is a RegExp object, the actual value is - // equivalent if it is also a RegExp object with the same source and - // properties (`global`, `multiline`, `lastIndex`, `ignoreCase`). - } else if (util.isRegExp(actual) && util.isRegExp(expected)) { - return actual.source === expected.source && - actual.global === expected.global && - actual.multiline === expected.multiline && - actual.lastIndex === expected.lastIndex && - actual.ignoreCase === expected.ignoreCase; - - // 7.4. Other pairs that do not both pass typeof value == 'object', - // equivalence is determined by ==. - } else if ((actual === null || typeof actual !== 'object') && - (expected === null || typeof expected !== 'object')) { - return strict ? actual === expected : actual == expected; - - // If both values are instances of typed arrays, wrap their underlying - // ArrayBuffers in a Buffer each to increase performance - // This optimization requires the arrays to have the same type as checked by - // Object.prototype.toString (aka pToString). Never perform binary - // comparisons for Float*Arrays, though, since e.g. +0 === -0 but their - // bit patterns are not identical. - } else if (isView(actual) && isView(expected) && - pToString(actual) === pToString(expected) && - !(actual instanceof Float32Array || - actual instanceof Float64Array)) { - return compare(new Uint8Array(actual.buffer), - new Uint8Array(expected.buffer)) === 0; - - // 7.5 For all other Object pairs, including Array objects, equivalence is - // determined by having the same number of owned properties (as verified - // with Object.prototype.hasOwnProperty.call), the same set of keys - // (although not necessarily the same order), equivalent values for every - // corresponding key, and an identical 'prototype' property. Note: this - // accounts for both named and indexed properties on Arrays. - } else if (isBuffer(actual) !== isBuffer(expected)) { - return false; - } else { - memos = memos || {actual: [], expected: []}; - - var actualIndex = memos.actual.indexOf(actual); - if (actualIndex !== -1) { - if (actualIndex === memos.expected.indexOf(expected)) { - return true; - } - } - - memos.actual.push(actual); - memos.expected.push(expected); - - return objEquiv(actual, expected, strict, memos); - } -} - -function isArguments(object) { - return Object.prototype.toString.call(object) == '[object Arguments]'; -} - -function objEquiv(a, b, strict, actualVisitedObjects) { - if (a === null || a === undefined || b === null || b === undefined) - return false; - // if one is a primitive, the other must be same - if (util.isPrimitive(a) || util.isPrimitive(b)) - return a === b; - if (strict && Object.getPrototypeOf(a) !== Object.getPrototypeOf(b)) - return false; - var aIsArgs = isArguments(a); - var bIsArgs = isArguments(b); - if ((aIsArgs && !bIsArgs) || (!aIsArgs && bIsArgs)) - return false; - if (aIsArgs) { - a = pSlice.call(a); - b = pSlice.call(b); - return _deepEqual(a, b, strict); - } - var ka = objectKeys(a); - var kb = objectKeys(b); - var key, i; - // having the same number of owned properties (keys incorporates - // hasOwnProperty) - if (ka.length !== kb.length) - return false; - //the same set of keys (although not necessarily the same order), - ka.sort(); - kb.sort(); - //~~~cheap key test - for (i = ka.length - 1; i >= 0; i--) { - if (ka[i] !== kb[i]) - return false; - } - //equivalent values for every corresponding key, and - //~~~possibly expensive deep test - for (i = ka.length - 1; i >= 0; i--) { - key = ka[i]; - if (!_deepEqual(a[key], b[key], strict, actualVisitedObjects)) - return false; - } - return true; -} - -// 8. The non-equivalence assertion tests for any deep inequality. -// assert.notDeepEqual(actual, expected, message_opt); - -assert.notDeepEqual = function notDeepEqual(actual, expected, message) { - if (_deepEqual(actual, expected, false)) { - fail(actual, expected, message, 'notDeepEqual', assert.notDeepEqual); - } -}; - -assert.notDeepStrictEqual = notDeepStrictEqual; -function notDeepStrictEqual(actual, expected, message) { - if (_deepEqual(actual, expected, true)) { - fail(actual, expected, message, 'notDeepStrictEqual', notDeepStrictEqual); - } -} - - -// 9. The strict equality assertion tests strict equality, as determined by ===. -// assert.strictEqual(actual, expected, message_opt); - -assert.strictEqual = function strictEqual(actual, expected, message) { - if (actual !== expected) { - fail(actual, expected, message, '===', assert.strictEqual); - } -}; - -// 10. The strict non-equality assertion tests for strict inequality, as -// determined by !==. assert.notStrictEqual(actual, expected, message_opt); - -assert.notStrictEqual = function notStrictEqual(actual, expected, message) { - if (actual === expected) { - fail(actual, expected, message, '!==', assert.notStrictEqual); - } -}; - -function expectedException(actual, expected) { - if (!actual || !expected) { - return false; - } - - if (Object.prototype.toString.call(expected) == '[object RegExp]') { - return expected.test(actual); - } - - try { - if (actual instanceof expected) { - return true; - } - } catch (e) { - // Ignore. The instanceof check doesn't work for arrow functions. - } - - if (Error.isPrototypeOf(expected)) { - return false; - } - - return expected.call({}, actual) === true; -} - -function _tryBlock(block) { - var error; - try { - block(); - } catch (e) { - error = e; - } - return error; -} - -function _throws(shouldThrow, block, expected, message) { - var actual; - - if (typeof block !== 'function') { - throw new TypeError('"block" argument must be a function'); - } - - if (typeof expected === 'string') { - message = expected; - expected = null; - } - - actual = _tryBlock(block); - - message = (expected && expected.name ? ' (' + expected.name + ').' : '.') + - (message ? ' ' + message : '.'); - - if (shouldThrow && !actual) { - fail(actual, expected, 'Missing expected exception' + message); - } - - var userProvidedMessage = typeof message === 'string'; - var isUnwantedException = !shouldThrow && util.isError(actual); - var isUnexpectedException = !shouldThrow && actual && !expected; - - if ((isUnwantedException && - userProvidedMessage && - expectedException(actual, expected)) || - isUnexpectedException) { - fail(actual, expected, 'Got unwanted exception' + message); - } - - if ((shouldThrow && actual && expected && - !expectedException(actual, expected)) || (!shouldThrow && actual)) { - throw actual; - } -} - -// 11. Expected to throw an error: -// assert.throws(block, Error_opt, message_opt); - -assert.throws = function(block, /*optional*/error, /*optional*/message) { - _throws(true, block, error, message); -}; - -// EXTENSION! This is annoying to write outside this module. -assert.doesNotThrow = function(block, /*optional*/error, /*optional*/message) { - _throws(false, block, error, message); -}; - -assert.ifError = function(err) { if (err) throw err; }; - -var objectKeys = Object.keys || function (obj) { - var keys = []; - for (var key in obj) { - if (hasOwn.call(obj, key)) keys.push(key); - } - return keys; -}; - -}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {}) -},{"util/":129}],33:[function(require,module,exports){ -arguments[4][2][0].apply(exports,arguments) -},{"dup":2}],34:[function(require,module,exports){ -var toString = {}.toString; - -module.exports = Array.isArray || function (arr) { - return toString.call(arr) == '[object Array]'; -}; - -},{}],35:[function(require,module,exports){ -// Copyright Joyent, Inc. and other Node contributors. -// -// Permission is hereby granted, free of charge, to any person obtaining a -// copy of this software and associated documentation files (the -// "Software"), to deal in the Software without restriction, including -// without limitation the rights to use, copy, modify, merge, publish, -// distribute, sublicense, and/or sell copies of the Software, and to permit -// persons to whom the Software is furnished to do so, subject to the -// following conditions: -// -// The above copyright notice and this permission notice shall be included -// in all copies or substantial portions of the Software. -// -// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS -// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF -// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN -// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, -// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR -// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE -// USE OR OTHER DEALINGS IN THE SOFTWARE. - -// a duplex stream is just a stream that is both readable and writable. -// Since JS doesn't have multiple prototypal inheritance, this class -// prototypally inherits from Readable, and then parasitically from -// Writable. - -'use strict'; - -/**/ - -var processNextTick = require('process-nextick-args'); -/**/ - -/**/ -var objectKeys = Object.keys || function (obj) { - var keys = []; - for (var key in obj) { - keys.push(key); - }return keys; -}; -/**/ - -module.exports = Duplex; - -/**/ -var util = require('core-util-is'); -util.inherits = require('inherits'); -/**/ - -var Readable = require('./_stream_readable'); -var Writable = require('./_stream_writable'); - -util.inherits(Duplex, Readable); - -var keys = objectKeys(Writable.prototype); -for (var v = 0; v < keys.length; v++) { - var method = keys[v]; - if (!Duplex.prototype[method]) Duplex.prototype[method] = Writable.prototype[method]; -} - -function Duplex(options) { - if (!(this instanceof Duplex)) return new Duplex(options); - - Readable.call(this, options); - Writable.call(this, options); - - if (options && options.readable === false) this.readable = false; - - if (options && options.writable === false) this.writable = false; - - this.allowHalfOpen = true; - if (options && options.allowHalfOpen === false) this.allowHalfOpen = false; - - this.once('end', onend); -} - -// the no-half-open enforcer -function onend() { - // if we allow half-open state, or if the writable side ended, - // then we're ok. - if (this.allowHalfOpen || this._writableState.ended) return; - - // no more data can be written. - // But allow more writes to happen in this tick. - processNextTick(onEndNT, this); -} - -function onEndNT(self) { - self.end(); -} - -Object.defineProperty(Duplex.prototype, 'destroyed', { - get: function () { - if (this._readableState === undefined || this._writableState === undefined) { - return false; - } - return this._readableState.destroyed && this._writableState.destroyed; - }, - set: function (value) { - // we ignore the value if the stream - // has not been initialized yet - if (this._readableState === undefined || this._writableState === undefined) { - return; - } - - // backward compatibility, the user is explicitly - // managing destroyed - this._readableState.destroyed = value; - this._writableState.destroyed = value; - } -}); - -Duplex.prototype._destroy = function (err, cb) { - this.push(null); - this.end(); - - processNextTick(cb, err); -}; - -function forEach(xs, f) { - for (var i = 0, l = xs.length; i < l; i++) { - f(xs[i], i); - } -} -},{"./_stream_readable":37,"./_stream_writable":39,"core-util-is":7,"inherits":47,"process-nextick-args":93}],36:[function(require,module,exports){ -// Copyright Joyent, Inc. and other Node contributors. -// -// Permission is hereby granted, free of charge, to any person obtaining a -// copy of this software and associated documentation files (the -// "Software"), to deal in the Software without restriction, including -// without limitation the rights to use, copy, modify, merge, publish, -// distribute, sublicense, and/or sell copies of the Software, and to permit -// persons to whom the Software is furnished to do so, subject to the -// following conditions: -// -// The above copyright notice and this permission notice shall be included -// in all copies or substantial portions of the Software. -// -// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS -// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF -// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN -// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, -// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR -// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE -// USE OR OTHER DEALINGS IN THE SOFTWARE. - -// a passthrough stream. -// basically just the most minimal sort of Transform stream. -// Every written chunk gets output as-is. - -'use strict'; - -module.exports = PassThrough; - -var Transform = require('./_stream_transform'); - -/**/ -var util = require('core-util-is'); -util.inherits = require('inherits'); -/**/ - -util.inherits(PassThrough, Transform); - -function PassThrough(options) { - if (!(this instanceof PassThrough)) return new PassThrough(options); - - Transform.call(this, options); -} - -PassThrough.prototype._transform = function (chunk, encoding, cb) { - cb(null, chunk); -}; -},{"./_stream_transform":38,"core-util-is":7,"inherits":47}],37:[function(require,module,exports){ -(function (process,global){ -// Copyright Joyent, Inc. and other Node contributors. -// -// Permission is hereby granted, free of charge, to any person obtaining a -// copy of this software and associated documentation files (the -// "Software"), to deal in the Software without restriction, including -// without limitation the rights to use, copy, modify, merge, publish, -// distribute, sublicense, and/or sell copies of the Software, and to permit -// persons to whom the Software is furnished to do so, subject to the -// following conditions: -// -// The above copyright notice and this permission notice shall be included -// in all copies or substantial portions of the Software. -// -// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS -// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF -// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN -// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, -// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR -// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE -// USE OR OTHER DEALINGS IN THE SOFTWARE. - -'use strict'; - -/**/ - -var processNextTick = require('process-nextick-args'); -/**/ - -module.exports = Readable; - -/**/ -var isArray = require('isarray'); -/**/ - -/**/ -var Duplex; -/**/ - -Readable.ReadableState = ReadableState; - -/**/ -var EE = require('events').EventEmitter; - -var EElistenerCount = function (emitter, type) { - return emitter.listeners(type).length; -}; -/**/ - -/**/ -var Stream = require('./internal/streams/stream'); -/**/ - -// TODO(bmeurer): Change this back to const once hole checks are -// properly optimized away early in Ignition+TurboFan. -/**/ -var Buffer = require('safe-buffer').Buffer; -var OurUint8Array = global.Uint8Array || function () {}; -function _uint8ArrayToBuffer(chunk) { - return Buffer.from(chunk); -} -function _isUint8Array(obj) { - return Buffer.isBuffer(obj) || obj instanceof OurUint8Array; -} -/**/ - -/**/ -var util = require('core-util-is'); -util.inherits = require('inherits'); -/**/ - -/**/ -var debugUtil = require('util'); -var debug = void 0; -if (debugUtil && debugUtil.debuglog) { - debug = debugUtil.debuglog('stream'); -} else { - debug = function () {}; -} -/**/ - -var BufferList = require('./internal/streams/BufferList'); -var destroyImpl = require('./internal/streams/destroy'); -var StringDecoder; - -util.inherits(Readable, Stream); - -var kProxyEvents = ['error', 'close', 'destroy', 'pause', 'resume']; - -function prependListener(emitter, event, fn) { - // Sadly this is not cacheable as some libraries bundle their own - // event emitter implementation with them. - if (typeof emitter.prependListener === 'function') { - return emitter.prependListener(event, fn); - } else { - // This is a hack to make sure that our error handler is attached before any - // userland ones. NEVER DO THIS. This is here only because this code needs - // to continue to work with older versions of Node.js that do not include - // the prependListener() method. The goal is to eventually remove this hack. - if (!emitter._events || !emitter._events[event]) emitter.on(event, fn);else if (isArray(emitter._events[event])) emitter._events[event].unshift(fn);else emitter._events[event] = [fn, emitter._events[event]]; - } -} - -function ReadableState(options, stream) { - Duplex = Duplex || require('./_stream_duplex'); - - options = options || {}; - - // object stream flag. Used to make read(n) ignore n and to - // make all the buffer merging and length checks go away - this.objectMode = !!options.objectMode; - - if (stream instanceof Duplex) this.objectMode = this.objectMode || !!options.readableObjectMode; - - // the point at which it stops calling _read() to fill the buffer - // Note: 0 is a valid value, means "don't call _read preemptively ever" - var hwm = options.highWaterMark; - var defaultHwm = this.objectMode ? 16 : 16 * 1024; - this.highWaterMark = hwm || hwm === 0 ? hwm : defaultHwm; - - // cast to ints. - this.highWaterMark = Math.floor(this.highWaterMark); - - // A linked list is used to store data chunks instead of an array because the - // linked list can remove elements from the beginning faster than - // array.shift() - this.buffer = new BufferList(); - this.length = 0; - this.pipes = null; - this.pipesCount = 0; - this.flowing = null; - this.ended = false; - this.endEmitted = false; - this.reading = false; - - // a flag to be able to tell if the event 'readable'/'data' is emitted - // immediately, or on a later tick. We set this to true at first, because - // any actions that shouldn't happen until "later" should generally also - // not happen before the first read call. - this.sync = true; - - // whenever we return null, then we set a flag to say - // that we're awaiting a 'readable' event emission. - this.needReadable = false; - this.emittedReadable = false; - this.readableListening = false; - this.resumeScheduled = false; - - // has it been destroyed - this.destroyed = false; - - // Crypto is kind of old and crusty. Historically, its default string - // encoding is 'binary' so we have to make this configurable. - // Everything else in the universe uses 'utf8', though. - this.defaultEncoding = options.defaultEncoding || 'utf8'; - - // the number of writers that are awaiting a drain event in .pipe()s - this.awaitDrain = 0; - - // if true, a maybeReadMore has been scheduled - this.readingMore = false; - - this.decoder = null; - this.encoding = null; - if (options.encoding) { - if (!StringDecoder) StringDecoder = require('string_decoder/').StringDecoder; - this.decoder = new StringDecoder(options.encoding); - this.encoding = options.encoding; - } -} - -function Readable(options) { - Duplex = Duplex || require('./_stream_duplex'); - - if (!(this instanceof Readable)) return new Readable(options); - - this._readableState = new ReadableState(options, this); - - // legacy - this.readable = true; - - if (options) { - if (typeof options.read === 'function') this._read = options.read; - - if (typeof options.destroy === 'function') this._destroy = options.destroy; - } - - Stream.call(this); -} - -Object.defineProperty(Readable.prototype, 'destroyed', { - get: function () { - if (this._readableState === undefined) { - return false; - } - return this._readableState.destroyed; - }, - set: function (value) { - // we ignore the value if the stream - // has not been initialized yet - if (!this._readableState) { - return; - } - - // backward compatibility, the user is explicitly - // managing destroyed - this._readableState.destroyed = value; - } -}); - -Readable.prototype.destroy = destroyImpl.destroy; -Readable.prototype._undestroy = destroyImpl.undestroy; -Readable.prototype._destroy = function (err, cb) { - this.push(null); - cb(err); -}; - -// Manually shove something into the read() buffer. -// This returns true if the highWaterMark has not been hit yet, -// similar to how Writable.write() returns true if you should -// write() some more. -Readable.prototype.push = function (chunk, encoding) { - var state = this._readableState; - var skipChunkCheck; - - if (!state.objectMode) { - if (typeof chunk === 'string') { - encoding = encoding || state.defaultEncoding; - if (encoding !== state.encoding) { - chunk = Buffer.from(chunk, encoding); - encoding = ''; - } - skipChunkCheck = true; - } - } else { - skipChunkCheck = true; - } - - return readableAddChunk(this, chunk, encoding, false, skipChunkCheck); -}; - -// Unshift should *always* be something directly out of read() -Readable.prototype.unshift = function (chunk) { - return readableAddChunk(this, chunk, null, true, false); -}; - -function readableAddChunk(stream, chunk, encoding, addToFront, skipChunkCheck) { - var state = stream._readableState; - if (chunk === null) { - state.reading = false; - onEofChunk(stream, state); - } else { - var er; - if (!skipChunkCheck) er = chunkInvalid(state, chunk); - if (er) { - stream.emit('error', er); - } else if (state.objectMode || chunk && chunk.length > 0) { - if (typeof chunk !== 'string' && !state.objectMode && Object.getPrototypeOf(chunk) !== Buffer.prototype) { - chunk = _uint8ArrayToBuffer(chunk); - } - - if (addToFront) { - if (state.endEmitted) stream.emit('error', new Error('stream.unshift() after end event'));else addChunk(stream, state, chunk, true); - } else if (state.ended) { - stream.emit('error', new Error('stream.push() after EOF')); - } else { - state.reading = false; - if (state.decoder && !encoding) { - chunk = state.decoder.write(chunk); - if (state.objectMode || chunk.length !== 0) addChunk(stream, state, chunk, false);else maybeReadMore(stream, state); - } else { - addChunk(stream, state, chunk, false); - } - } - } else if (!addToFront) { - state.reading = false; - } - } - - return needMoreData(state); -} - -function addChunk(stream, state, chunk, addToFront) { - if (state.flowing && state.length === 0 && !state.sync) { - stream.emit('data', chunk); - stream.read(0); - } else { - // update the buffer info. - state.length += state.objectMode ? 1 : chunk.length; - if (addToFront) state.buffer.unshift(chunk);else state.buffer.push(chunk); - - if (state.needReadable) emitReadable(stream); - } - maybeReadMore(stream, state); -} - -function chunkInvalid(state, chunk) { - var er; - if (!_isUint8Array(chunk) && typeof chunk !== 'string' && chunk !== undefined && !state.objectMode) { - er = new TypeError('Invalid non-string/buffer chunk'); - } - return er; -} - -// if it's past the high water mark, we can push in some more. -// Also, if we have no data yet, we can stand some -// more bytes. This is to work around cases where hwm=0, -// such as the repl. Also, if the push() triggered a -// readable event, and the user called read(largeNumber) such that -// needReadable was set, then we ought to push more, so that another -// 'readable' event will be triggered. -function needMoreData(state) { - return !state.ended && (state.needReadable || state.length < state.highWaterMark || state.length === 0); -} - -Readable.prototype.isPaused = function () { - return this._readableState.flowing === false; -}; - -// backwards compatibility. -Readable.prototype.setEncoding = function (enc) { - if (!StringDecoder) StringDecoder = require('string_decoder/').StringDecoder; - this._readableState.decoder = new StringDecoder(enc); - this._readableState.encoding = enc; - return this; -}; - -// Don't raise the hwm > 8MB -var MAX_HWM = 0x800000; -function computeNewHighWaterMark(n) { - if (n >= MAX_HWM) { - n = MAX_HWM; - } else { - // Get the next highest power of 2 to prevent increasing hwm excessively in - // tiny amounts - n--; - n |= n >>> 1; - n |= n >>> 2; - n |= n >>> 4; - n |= n >>> 8; - n |= n >>> 16; - n++; - } - return n; -} - -// This function is designed to be inlinable, so please take care when making -// changes to the function body. -function howMuchToRead(n, state) { - if (n <= 0 || state.length === 0 && state.ended) return 0; - if (state.objectMode) return 1; - if (n !== n) { - // Only flow one buffer at a time - if (state.flowing && state.length) return state.buffer.head.data.length;else return state.length; - } - // If we're asking for more than the current hwm, then raise the hwm. - if (n > state.highWaterMark) state.highWaterMark = computeNewHighWaterMark(n); - if (n <= state.length) return n; - // Don't have enough - if (!state.ended) { - state.needReadable = true; - return 0; - } - return state.length; -} - -// you can override either this method, or the async _read(n) below. -Readable.prototype.read = function (n) { - debug('read', n); - n = parseInt(n, 10); - var state = this._readableState; - var nOrig = n; - - if (n !== 0) state.emittedReadable = false; - - // if we're doing read(0) to trigger a readable event, but we - // already have a bunch of data in the buffer, then just trigger - // the 'readable' event and move on. - if (n === 0 && state.needReadable && (state.length >= state.highWaterMark || state.ended)) { - debug('read: emitReadable', state.length, state.ended); - if (state.length === 0 && state.ended) endReadable(this);else emitReadable(this); - return null; - } - - n = howMuchToRead(n, state); - - // if we've ended, and we're now clear, then finish it up. - if (n === 0 && state.ended) { - if (state.length === 0) endReadable(this); - return null; - } - - // All the actual chunk generation logic needs to be - // *below* the call to _read. The reason is that in certain - // synthetic stream cases, such as passthrough streams, _read - // may be a completely synchronous operation which may change - // the state of the read buffer, providing enough data when - // before there was *not* enough. - // - // So, the steps are: - // 1. Figure out what the state of things will be after we do - // a read from the buffer. - // - // 2. If that resulting state will trigger a _read, then call _read. - // Note that this may be asynchronous, or synchronous. Yes, it is - // deeply ugly to write APIs this way, but that still doesn't mean - // that the Readable class should behave improperly, as streams are - // designed to be sync/async agnostic. - // Take note if the _read call is sync or async (ie, if the read call - // has returned yet), so that we know whether or not it's safe to emit - // 'readable' etc. - // - // 3. Actually pull the requested chunks out of the buffer and return. - - // if we need a readable event, then we need to do some reading. - var doRead = state.needReadable; - debug('need readable', doRead); - - // if we currently have less than the highWaterMark, then also read some - if (state.length === 0 || state.length - n < state.highWaterMark) { - doRead = true; - debug('length less than watermark', doRead); - } - - // however, if we've ended, then there's no point, and if we're already - // reading, then it's unnecessary. - if (state.ended || state.reading) { - doRead = false; - debug('reading or ended', doRead); - } else if (doRead) { - debug('do read'); - state.reading = true; - state.sync = true; - // if the length is currently zero, then we *need* a readable event. - if (state.length === 0) state.needReadable = true; - // call internal read method - this._read(state.highWaterMark); - state.sync = false; - // If _read pushed data synchronously, then `reading` will be false, - // and we need to re-evaluate how much data we can return to the user. - if (!state.reading) n = howMuchToRead(nOrig, state); - } - - var ret; - if (n > 0) ret = fromList(n, state);else ret = null; - - if (ret === null) { - state.needReadable = true; - n = 0; - } else { - state.length -= n; - } - - if (state.length === 0) { - // If we have nothing in the buffer, then we want to know - // as soon as we *do* get something into the buffer. - if (!state.ended) state.needReadable = true; - - // If we tried to read() past the EOF, then emit end on the next tick. - if (nOrig !== n && state.ended) endReadable(this); - } - - if (ret !== null) this.emit('data', ret); - - return ret; -}; - -function onEofChunk(stream, state) { - if (state.ended) return; - if (state.decoder) { - var chunk = state.decoder.end(); - if (chunk && chunk.length) { - state.buffer.push(chunk); - state.length += state.objectMode ? 1 : chunk.length; - } - } - state.ended = true; - - // emit 'readable' now to make sure it gets picked up. - emitReadable(stream); -} - -// Don't emit readable right away in sync mode, because this can trigger -// another read() call => stack overflow. This way, it might trigger -// a nextTick recursion warning, but that's not so bad. -function emitReadable(stream) { - var state = stream._readableState; - state.needReadable = false; - if (!state.emittedReadable) { - debug('emitReadable', state.flowing); - state.emittedReadable = true; - if (state.sync) processNextTick(emitReadable_, stream);else emitReadable_(stream); - } -} - -function emitReadable_(stream) { - debug('emit readable'); - stream.emit('readable'); - flow(stream); -} - -// at this point, the user has presumably seen the 'readable' event, -// and called read() to consume some data. that may have triggered -// in turn another _read(n) call, in which case reading = true if -// it's in progress. -// However, if we're not ended, or reading, and the length < hwm, -// then go ahead and try to read some more preemptively. -function maybeReadMore(stream, state) { - if (!state.readingMore) { - state.readingMore = true; - processNextTick(maybeReadMore_, stream, state); - } -} - -function maybeReadMore_(stream, state) { - var len = state.length; - while (!state.reading && !state.flowing && !state.ended && state.length < state.highWaterMark) { - debug('maybeReadMore read 0'); - stream.read(0); - if (len === state.length) - // didn't get any data, stop spinning. - break;else len = state.length; - } - state.readingMore = false; -} - -// abstract method. to be overridden in specific implementation classes. -// call cb(er, data) where data is <= n in length. -// for virtual (non-string, non-buffer) streams, "length" is somewhat -// arbitrary, and perhaps not very meaningful. -Readable.prototype._read = function (n) { - this.emit('error', new Error('_read() is not implemented')); -}; - -Readable.prototype.pipe = function (dest, pipeOpts) { - var src = this; - var state = this._readableState; - - switch (state.pipesCount) { - case 0: - state.pipes = dest; - break; - case 1: - state.pipes = [state.pipes, dest]; - break; - default: - state.pipes.push(dest); - break; - } - state.pipesCount += 1; - debug('pipe count=%d opts=%j', state.pipesCount, pipeOpts); - - var doEnd = (!pipeOpts || pipeOpts.end !== false) && dest !== process.stdout && dest !== process.stderr; - - var endFn = doEnd ? onend : unpipe; - if (state.endEmitted) processNextTick(endFn);else src.once('end', endFn); - - dest.on('unpipe', onunpipe); - function onunpipe(readable, unpipeInfo) { - debug('onunpipe'); - if (readable === src) { - if (unpipeInfo && unpipeInfo.hasUnpiped === false) { - unpipeInfo.hasUnpiped = true; - cleanup(); - } - } - } - - function onend() { - debug('onend'); - dest.end(); - } - - // when the dest drains, it reduces the awaitDrain counter - // on the source. This would be more elegant with a .once() - // handler in flow(), but adding and removing repeatedly is - // too slow. - var ondrain = pipeOnDrain(src); - dest.on('drain', ondrain); - - var cleanedUp = false; - function cleanup() { - debug('cleanup'); - // cleanup event handlers once the pipe is broken - dest.removeListener('close', onclose); - dest.removeListener('finish', onfinish); - dest.removeListener('drain', ondrain); - dest.removeListener('error', onerror); - dest.removeListener('unpipe', onunpipe); - src.removeListener('end', onend); - src.removeListener('end', unpipe); - src.removeListener('data', ondata); - - cleanedUp = true; - - // if the reader is waiting for a drain event from this - // specific writer, then it would cause it to never start - // flowing again. - // So, if this is awaiting a drain, then we just call it now. - // If we don't know, then assume that we are waiting for one. - if (state.awaitDrain && (!dest._writableState || dest._writableState.needDrain)) ondrain(); - } - - // If the user pushes more data while we're writing to dest then we'll end up - // in ondata again. However, we only want to increase awaitDrain once because - // dest will only emit one 'drain' event for the multiple writes. - // => Introduce a guard on increasing awaitDrain. - var increasedAwaitDrain = false; - src.on('data', ondata); - function ondata(chunk) { - debug('ondata'); - increasedAwaitDrain = false; - var ret = dest.write(chunk); - if (false === ret && !increasedAwaitDrain) { - // If the user unpiped during `dest.write()`, it is possible - // to get stuck in a permanently paused state if that write - // also returned false. - // => Check whether `dest` is still a piping destination. - if ((state.pipesCount === 1 && state.pipes === dest || state.pipesCount > 1 && indexOf(state.pipes, dest) !== -1) && !cleanedUp) { - debug('false write response, pause', src._readableState.awaitDrain); - src._readableState.awaitDrain++; - increasedAwaitDrain = true; - } - src.pause(); - } - } - - // if the dest has an error, then stop piping into it. - // however, don't suppress the throwing behavior for this. - function onerror(er) { - debug('onerror', er); - unpipe(); - dest.removeListener('error', onerror); - if (EElistenerCount(dest, 'error') === 0) dest.emit('error', er); - } - - // Make sure our error handler is attached before userland ones. - prependListener(dest, 'error', onerror); - - // Both close and finish should trigger unpipe, but only once. - function onclose() { - dest.removeListener('finish', onfinish); - unpipe(); - } - dest.once('close', onclose); - function onfinish() { - debug('onfinish'); - dest.removeListener('close', onclose); - unpipe(); - } - dest.once('finish', onfinish); - - function unpipe() { - debug('unpipe'); - src.unpipe(dest); - } - - // tell the dest that it's being piped to - dest.emit('pipe', src); - - // start the flow if it hasn't been started already. - if (!state.flowing) { - debug('pipe resume'); - src.resume(); - } - - return dest; -}; - -function pipeOnDrain(src) { - return function () { - var state = src._readableState; - debug('pipeOnDrain', state.awaitDrain); - if (state.awaitDrain) state.awaitDrain--; - if (state.awaitDrain === 0 && EElistenerCount(src, 'data')) { - state.flowing = true; - flow(src); - } - }; -} - -Readable.prototype.unpipe = function (dest) { - var state = this._readableState; - var unpipeInfo = { hasUnpiped: false }; - - // if we're not piping anywhere, then do nothing. - if (state.pipesCount === 0) return this; - - // just one destination. most common case. - if (state.pipesCount === 1) { - // passed in one, but it's not the right one. - if (dest && dest !== state.pipes) return this; - - if (!dest) dest = state.pipes; - - // got a match. - state.pipes = null; - state.pipesCount = 0; - state.flowing = false; - if (dest) dest.emit('unpipe', this, unpipeInfo); - return this; - } - - // slow case. multiple pipe destinations. - - if (!dest) { - // remove all. - var dests = state.pipes; - var len = state.pipesCount; - state.pipes = null; - state.pipesCount = 0; - state.flowing = false; - - for (var i = 0; i < len; i++) { - dests[i].emit('unpipe', this, unpipeInfo); - }return this; - } - - // try to find the right one. - var index = indexOf(state.pipes, dest); - if (index === -1) return this; - - state.pipes.splice(index, 1); - state.pipesCount -= 1; - if (state.pipesCount === 1) state.pipes = state.pipes[0]; - - dest.emit('unpipe', this, unpipeInfo); - - return this; -}; - -// set up data events if they are asked for -// Ensure readable listeners eventually get something -Readable.prototype.on = function (ev, fn) { - var res = Stream.prototype.on.call(this, ev, fn); - - if (ev === 'data') { - // Start flowing on next tick if stream isn't explicitly paused - if (this._readableState.flowing !== false) this.resume(); - } else if (ev === 'readable') { - var state = this._readableState; - if (!state.endEmitted && !state.readableListening) { - state.readableListening = state.needReadable = true; - state.emittedReadable = false; - if (!state.reading) { - processNextTick(nReadingNextTick, this); - } else if (state.length) { - emitReadable(this); - } - } - } - - return res; -}; -Readable.prototype.addListener = Readable.prototype.on; - -function nReadingNextTick(self) { - debug('readable nexttick read 0'); - self.read(0); -} - -// pause() and resume() are remnants of the legacy readable stream API -// If the user uses them, then switch into old mode. -Readable.prototype.resume = function () { - var state = this._readableState; - if (!state.flowing) { - debug('resume'); - state.flowing = true; - resume(this, state); - } - return this; -}; - -function resume(stream, state) { - if (!state.resumeScheduled) { - state.resumeScheduled = true; - processNextTick(resume_, stream, state); - } -} - -function resume_(stream, state) { - if (!state.reading) { - debug('resume read 0'); - stream.read(0); - } - - state.resumeScheduled = false; - state.awaitDrain = 0; - stream.emit('resume'); - flow(stream); - if (state.flowing && !state.reading) stream.read(0); -} - -Readable.prototype.pause = function () { - debug('call pause flowing=%j', this._readableState.flowing); - if (false !== this._readableState.flowing) { - debug('pause'); - this._readableState.flowing = false; - this.emit('pause'); - } - return this; -}; - -function flow(stream) { - var state = stream._readableState; - debug('flow', state.flowing); - while (state.flowing && stream.read() !== null) {} -} - -// wrap an old-style stream as the async data source. -// This is *not* part of the readable stream interface. -// It is an ugly unfortunate mess of history. -Readable.prototype.wrap = function (stream) { - var state = this._readableState; - var paused = false; - - var self = this; - stream.on('end', function () { - debug('wrapped end'); - if (state.decoder && !state.ended) { - var chunk = state.decoder.end(); - if (chunk && chunk.length) self.push(chunk); - } - - self.push(null); - }); - - stream.on('data', function (chunk) { - debug('wrapped data'); - if (state.decoder) chunk = state.decoder.write(chunk); - - // don't skip over falsy values in objectMode - if (state.objectMode && (chunk === null || chunk === undefined)) return;else if (!state.objectMode && (!chunk || !chunk.length)) return; - - var ret = self.push(chunk); - if (!ret) { - paused = true; - stream.pause(); - } - }); - - // proxy all the other methods. - // important when wrapping filters and duplexes. - for (var i in stream) { - if (this[i] === undefined && typeof stream[i] === 'function') { - this[i] = function (method) { - return function () { - return stream[method].apply(stream, arguments); - }; - }(i); - } - } - - // proxy certain important events. - for (var n = 0; n < kProxyEvents.length; n++) { - stream.on(kProxyEvents[n], self.emit.bind(self, kProxyEvents[n])); - } - - // when we try to consume some more bytes, simply unpause the - // underlying stream. - self._read = function (n) { - debug('wrapped _read', n); - if (paused) { - paused = false; - stream.resume(); - } - }; - - return self; -}; - -// exposed for testing purposes only. -Readable._fromList = fromList; - -// Pluck off n bytes from an array of buffers. -// Length is the combined lengths of all the buffers in the list. -// This function is designed to be inlinable, so please take care when making -// changes to the function body. -function fromList(n, state) { - // nothing buffered - if (state.length === 0) return null; - - var ret; - if (state.objectMode) ret = state.buffer.shift();else if (!n || n >= state.length) { - // read it all, truncate the list - if (state.decoder) ret = state.buffer.join('');else if (state.buffer.length === 1) ret = state.buffer.head.data;else ret = state.buffer.concat(state.length); - state.buffer.clear(); - } else { - // read part of list - ret = fromListPartial(n, state.buffer, state.decoder); - } - - return ret; -} - -// Extracts only enough buffered data to satisfy the amount requested. -// This function is designed to be inlinable, so please take care when making -// changes to the function body. -function fromListPartial(n, list, hasStrings) { - var ret; - if (n < list.head.data.length) { - // slice is the same for buffers and strings - ret = list.head.data.slice(0, n); - list.head.data = list.head.data.slice(n); - } else if (n === list.head.data.length) { - // first chunk is a perfect match - ret = list.shift(); - } else { - // result spans more than one buffer - ret = hasStrings ? copyFromBufferString(n, list) : copyFromBuffer(n, list); - } - return ret; -} - -// Copies a specified amount of characters from the list of buffered data -// chunks. -// This function is designed to be inlinable, so please take care when making -// changes to the function body. -function copyFromBufferString(n, list) { - var p = list.head; - var c = 1; - var ret = p.data; - n -= ret.length; - while (p = p.next) { - var str = p.data; - var nb = n > str.length ? str.length : n; - if (nb === str.length) ret += str;else ret += str.slice(0, n); - n -= nb; - if (n === 0) { - if (nb === str.length) { - ++c; - if (p.next) list.head = p.next;else list.head = list.tail = null; - } else { - list.head = p; - p.data = str.slice(nb); - } - break; - } - ++c; - } - list.length -= c; - return ret; -} - -// Copies a specified amount of bytes from the list of buffered data chunks. -// This function is designed to be inlinable, so please take care when making -// changes to the function body. -function copyFromBuffer(n, list) { - var ret = Buffer.allocUnsafe(n); - var p = list.head; - var c = 1; - p.data.copy(ret); - n -= p.data.length; - while (p = p.next) { - var buf = p.data; - var nb = n > buf.length ? buf.length : n; - buf.copy(ret, ret.length - n, 0, nb); - n -= nb; - if (n === 0) { - if (nb === buf.length) { - ++c; - if (p.next) list.head = p.next;else list.head = list.tail = null; - } else { - list.head = p; - p.data = buf.slice(nb); - } - break; - } - ++c; - } - list.length -= c; - return ret; -} - -function endReadable(stream) { - var state = stream._readableState; - - // If we get here before consuming all the bytes, then that is a - // bug in node. Should never happen. - if (state.length > 0) throw new Error('"endReadable()" called on non-empty stream'); - - if (!state.endEmitted) { - state.ended = true; - processNextTick(endReadableNT, state, stream); - } -} - -function endReadableNT(state, stream) { - // Check that we didn't get one last unshift. - if (!state.endEmitted && state.length === 0) { - state.endEmitted = true; - stream.readable = false; - stream.emit('end'); - } -} - -function forEach(xs, f) { - for (var i = 0, l = xs.length; i < l; i++) { - f(xs[i], i); - } -} - -function indexOf(xs, x) { - for (var i = 0, l = xs.length; i < l; i++) { - if (xs[i] === x) return i; - } - return -1; -} -}).call(this,require('_process'),typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {}) -},{"./_stream_duplex":35,"./internal/streams/BufferList":40,"./internal/streams/destroy":41,"./internal/streams/stream":42,"_process":94,"core-util-is":7,"events":12,"inherits":47,"isarray":34,"process-nextick-args":93,"safe-buffer":101,"string_decoder/":45,"util":2}],38:[function(require,module,exports){ -// Copyright Joyent, Inc. and other Node contributors. -// -// Permission is hereby granted, free of charge, to any person obtaining a -// copy of this software and associated documentation files (the -// "Software"), to deal in the Software without restriction, including -// without limitation the rights to use, copy, modify, merge, publish, -// distribute, sublicense, and/or sell copies of the Software, and to permit -// persons to whom the Software is furnished to do so, subject to the -// following conditions: -// -// The above copyright notice and this permission notice shall be included -// in all copies or substantial portions of the Software. -// -// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS -// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF -// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN -// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, -// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR -// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE -// USE OR OTHER DEALINGS IN THE SOFTWARE. - -// a transform stream is a readable/writable stream where you do -// something with the data. Sometimes it's called a "filter", -// but that's not a great name for it, since that implies a thing where -// some bits pass through, and others are simply ignored. (That would -// be a valid example of a transform, of course.) -// -// While the output is causally related to the input, it's not a -// necessarily symmetric or synchronous transformation. For example, -// a zlib stream might take multiple plain-text writes(), and then -// emit a single compressed chunk some time in the future. -// -// Here's how this works: -// -// The Transform stream has all the aspects of the readable and writable -// stream classes. When you write(chunk), that calls _write(chunk,cb) -// internally, and returns false if there's a lot of pending writes -// buffered up. When you call read(), that calls _read(n) until -// there's enough pending readable data buffered up. -// -// In a transform stream, the written data is placed in a buffer. When -// _read(n) is called, it transforms the queued up data, calling the -// buffered _write cb's as it consumes chunks. If consuming a single -// written chunk would result in multiple output chunks, then the first -// outputted bit calls the readcb, and subsequent chunks just go into -// the read buffer, and will cause it to emit 'readable' if necessary. -// -// This way, back-pressure is actually determined by the reading side, -// since _read has to be called to start processing a new chunk. However, -// a pathological inflate type of transform can cause excessive buffering -// here. For example, imagine a stream where every byte of input is -// interpreted as an integer from 0-255, and then results in that many -// bytes of output. Writing the 4 bytes {ff,ff,ff,ff} would result in -// 1kb of data being output. In this case, you could write a very small -// amount of input, and end up with a very large amount of output. In -// such a pathological inflating mechanism, there'd be no way to tell -// the system to stop doing the transform. A single 4MB write could -// cause the system to run out of memory. -// -// However, even in such a pathological case, only a single written chunk -// would be consumed, and then the rest would wait (un-transformed) until -// the results of the previous transformed chunk were consumed. - -'use strict'; - -module.exports = Transform; - -var Duplex = require('./_stream_duplex'); - -/**/ -var util = require('core-util-is'); -util.inherits = require('inherits'); -/**/ - -util.inherits(Transform, Duplex); - -function TransformState(stream) { - this.afterTransform = function (er, data) { - return afterTransform(stream, er, data); - }; - - this.needTransform = false; - this.transforming = false; - this.writecb = null; - this.writechunk = null; - this.writeencoding = null; -} - -function afterTransform(stream, er, data) { - var ts = stream._transformState; - ts.transforming = false; - - var cb = ts.writecb; - - if (!cb) { - return stream.emit('error', new Error('write callback called multiple times')); - } - - ts.writechunk = null; - ts.writecb = null; - - if (data !== null && data !== undefined) stream.push(data); - - cb(er); - - var rs = stream._readableState; - rs.reading = false; - if (rs.needReadable || rs.length < rs.highWaterMark) { - stream._read(rs.highWaterMark); - } -} - -function Transform(options) { - if (!(this instanceof Transform)) return new Transform(options); - - Duplex.call(this, options); - - this._transformState = new TransformState(this); - - var stream = this; - - // start out asking for a readable event once data is transformed. - this._readableState.needReadable = true; - - // we have implemented the _read method, and done the other things - // that Readable wants before the first _read call, so unset the - // sync guard flag. - this._readableState.sync = false; - - if (options) { - if (typeof options.transform === 'function') this._transform = options.transform; - - if (typeof options.flush === 'function') this._flush = options.flush; - } - - // When the writable side finishes, then flush out anything remaining. - this.once('prefinish', function () { - if (typeof this._flush === 'function') this._flush(function (er, data) { - done(stream, er, data); - });else done(stream); - }); -} - -Transform.prototype.push = function (chunk, encoding) { - this._transformState.needTransform = false; - return Duplex.prototype.push.call(this, chunk, encoding); -}; - -// This is the part where you do stuff! -// override this function in implementation classes. -// 'chunk' is an input chunk. -// -// Call `push(newChunk)` to pass along transformed output -// to the readable side. You may call 'push' zero or more times. -// -// Call `cb(err)` when you are done with this chunk. If you pass -// an error, then that'll put the hurt on the whole operation. If you -// never call cb(), then you'll never get another chunk. -Transform.prototype._transform = function (chunk, encoding, cb) { - throw new Error('_transform() is not implemented'); -}; - -Transform.prototype._write = function (chunk, encoding, cb) { - var ts = this._transformState; - ts.writecb = cb; - ts.writechunk = chunk; - ts.writeencoding = encoding; - if (!ts.transforming) { - var rs = this._readableState; - if (ts.needTransform || rs.needReadable || rs.length < rs.highWaterMark) this._read(rs.highWaterMark); - } -}; - -// Doesn't matter what the args are here. -// _transform does all the work. -// That we got here means that the readable side wants more data. -Transform.prototype._read = function (n) { - var ts = this._transformState; - - if (ts.writechunk !== null && ts.writecb && !ts.transforming) { - ts.transforming = true; - this._transform(ts.writechunk, ts.writeencoding, ts.afterTransform); - } else { - // mark that we need a transform, so that any data that comes in - // will get processed, now that we've asked for it. - ts.needTransform = true; - } -}; - -Transform.prototype._destroy = function (err, cb) { - var _this = this; - - Duplex.prototype._destroy.call(this, err, function (err2) { - cb(err2); - _this.emit('close'); - }); -}; - -function done(stream, er, data) { - if (er) return stream.emit('error', er); - - if (data !== null && data !== undefined) stream.push(data); - - // if there's nothing in the write buffer, then that means - // that nothing more will ever be provided - var ws = stream._writableState; - var ts = stream._transformState; - - if (ws.length) throw new Error('Calling transform done when ws.length != 0'); - - if (ts.transforming) throw new Error('Calling transform done when still transforming'); - - return stream.push(null); -} -},{"./_stream_duplex":35,"core-util-is":7,"inherits":47}],39:[function(require,module,exports){ -(function (process,global){ -// Copyright Joyent, Inc. and other Node contributors. -// -// Permission is hereby granted, free of charge, to any person obtaining a -// copy of this software and associated documentation files (the -// "Software"), to deal in the Software without restriction, including -// without limitation the rights to use, copy, modify, merge, publish, -// distribute, sublicense, and/or sell copies of the Software, and to permit -// persons to whom the Software is furnished to do so, subject to the -// following conditions: -// -// The above copyright notice and this permission notice shall be included -// in all copies or substantial portions of the Software. -// -// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS -// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF -// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN -// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, -// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR -// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE -// USE OR OTHER DEALINGS IN THE SOFTWARE. - -// A bit simpler than readable streams. -// Implement an async ._write(chunk, encoding, cb), and it'll handle all -// the drain event emission and buffering. - -'use strict'; - -/**/ - -var processNextTick = require('process-nextick-args'); -/**/ - -module.exports = Writable; - -/* */ -function WriteReq(chunk, encoding, cb) { - this.chunk = chunk; - this.encoding = encoding; - this.callback = cb; - this.next = null; -} - -// It seems a linked list but it is not -// there will be only 2 of these for each stream -function CorkedRequest(state) { - var _this = this; - - this.next = null; - this.entry = null; - this.finish = function () { - onCorkedFinish(_this, state); - }; -} -/* */ - -/**/ -var asyncWrite = !process.browser && ['v0.10', 'v0.9.'].indexOf(process.version.slice(0, 5)) > -1 ? setImmediate : processNextTick; -/**/ - -/**/ -var Duplex; -/**/ - -Writable.WritableState = WritableState; - -/**/ -var util = require('core-util-is'); -util.inherits = require('inherits'); -/**/ - -/**/ -var internalUtil = { - deprecate: require('util-deprecate') -}; -/**/ - -/**/ -var Stream = require('./internal/streams/stream'); -/**/ - -/**/ -var Buffer = require('safe-buffer').Buffer; -var OurUint8Array = global.Uint8Array || function () {}; -function _uint8ArrayToBuffer(chunk) { - return Buffer.from(chunk); -} -function _isUint8Array(obj) { - return Buffer.isBuffer(obj) || obj instanceof OurUint8Array; -} -/**/ - -var destroyImpl = require('./internal/streams/destroy'); - -util.inherits(Writable, Stream); - -function nop() {} - -function WritableState(options, stream) { - Duplex = Duplex || require('./_stream_duplex'); - - options = options || {}; - - // object stream flag to indicate whether or not this stream - // contains buffers or objects. - this.objectMode = !!options.objectMode; - - if (stream instanceof Duplex) this.objectMode = this.objectMode || !!options.writableObjectMode; - - // the point at which write() starts returning false - // Note: 0 is a valid value, means that we always return false if - // the entire buffer is not flushed immediately on write() - var hwm = options.highWaterMark; - var defaultHwm = this.objectMode ? 16 : 16 * 1024; - this.highWaterMark = hwm || hwm === 0 ? hwm : defaultHwm; - - // cast to ints. - this.highWaterMark = Math.floor(this.highWaterMark); - - // if _final has been called - this.finalCalled = false; - - // drain event flag. - this.needDrain = false; - // at the start of calling end() - this.ending = false; - // when end() has been called, and returned - this.ended = false; - // when 'finish' is emitted - this.finished = false; - - // has it been destroyed - this.destroyed = false; - - // should we decode strings into buffers before passing to _write? - // this is here so that some node-core streams can optimize string - // handling at a lower level. - var noDecode = options.decodeStrings === false; - this.decodeStrings = !noDecode; - - // Crypto is kind of old and crusty. Historically, its default string - // encoding is 'binary' so we have to make this configurable. - // Everything else in the universe uses 'utf8', though. - this.defaultEncoding = options.defaultEncoding || 'utf8'; - - // not an actual buffer we keep track of, but a measurement - // of how much we're waiting to get pushed to some underlying - // socket or file. - this.length = 0; - - // a flag to see when we're in the middle of a write. - this.writing = false; - - // when true all writes will be buffered until .uncork() call - this.corked = 0; - - // a flag to be able to tell if the onwrite cb is called immediately, - // or on a later tick. We set this to true at first, because any - // actions that shouldn't happen until "later" should generally also - // not happen before the first write call. - this.sync = true; - - // a flag to know if we're processing previously buffered items, which - // may call the _write() callback in the same tick, so that we don't - // end up in an overlapped onwrite situation. - this.bufferProcessing = false; - - // the callback that's passed to _write(chunk,cb) - this.onwrite = function (er) { - onwrite(stream, er); - }; - - // the callback that the user supplies to write(chunk,encoding,cb) - this.writecb = null; - - // the amount that is being written when _write is called. - this.writelen = 0; - - this.bufferedRequest = null; - this.lastBufferedRequest = null; - - // number of pending user-supplied write callbacks - // this must be 0 before 'finish' can be emitted - this.pendingcb = 0; - - // emit prefinish if the only thing we're waiting for is _write cbs - // This is relevant for synchronous Transform streams - this.prefinished = false; - - // True if the error was already emitted and should not be thrown again - this.errorEmitted = false; - - // count buffered requests - this.bufferedRequestCount = 0; - - // allocate the first CorkedRequest, there is always - // one allocated and free to use, and we maintain at most two - this.corkedRequestsFree = new CorkedRequest(this); -} - -WritableState.prototype.getBuffer = function getBuffer() { - var current = this.bufferedRequest; - var out = []; - while (current) { - out.push(current); - current = current.next; - } - return out; -}; - -(function () { - try { - Object.defineProperty(WritableState.prototype, 'buffer', { - get: internalUtil.deprecate(function () { - return this.getBuffer(); - }, '_writableState.buffer is deprecated. Use _writableState.getBuffer ' + 'instead.', 'DEP0003') - }); - } catch (_) {} -})(); - -// Test _writableState for inheritance to account for Duplex streams, -// whose prototype chain only points to Readable. -var realHasInstance; -if (typeof Symbol === 'function' && Symbol.hasInstance && typeof Function.prototype[Symbol.hasInstance] === 'function') { - realHasInstance = Function.prototype[Symbol.hasInstance]; - Object.defineProperty(Writable, Symbol.hasInstance, { - value: function (object) { - if (realHasInstance.call(this, object)) return true; - - return object && object._writableState instanceof WritableState; - } - }); -} else { - realHasInstance = function (object) { - return object instanceof this; - }; -} - -function Writable(options) { - Duplex = Duplex || require('./_stream_duplex'); - - // Writable ctor is applied to Duplexes, too. - // `realHasInstance` is necessary because using plain `instanceof` - // would return false, as no `_writableState` property is attached. - - // Trying to use the custom `instanceof` for Writable here will also break the - // Node.js LazyTransform implementation, which has a non-trivial getter for - // `_writableState` that would lead to infinite recursion. - if (!realHasInstance.call(Writable, this) && !(this instanceof Duplex)) { - return new Writable(options); - } - - this._writableState = new WritableState(options, this); - - // legacy. - this.writable = true; - - if (options) { - if (typeof options.write === 'function') this._write = options.write; - - if (typeof options.writev === 'function') this._writev = options.writev; - - if (typeof options.destroy === 'function') this._destroy = options.destroy; - - if (typeof options.final === 'function') this._final = options.final; - } - - Stream.call(this); -} - -// Otherwise people can pipe Writable streams, which is just wrong. -Writable.prototype.pipe = function () { - this.emit('error', new Error('Cannot pipe, not readable')); -}; - -function writeAfterEnd(stream, cb) { - var er = new Error('write after end'); - // TODO: defer error events consistently everywhere, not just the cb - stream.emit('error', er); - processNextTick(cb, er); -} - -// Checks that a user-supplied chunk is valid, especially for the particular -// mode the stream is in. Currently this means that `null` is never accepted -// and undefined/non-string values are only allowed in object mode. -function validChunk(stream, state, chunk, cb) { - var valid = true; - var er = false; - - if (chunk === null) { - er = new TypeError('May not write null values to stream'); - } else if (typeof chunk !== 'string' && chunk !== undefined && !state.objectMode) { - er = new TypeError('Invalid non-string/buffer chunk'); - } - if (er) { - stream.emit('error', er); - processNextTick(cb, er); - valid = false; - } - return valid; -} - -Writable.prototype.write = function (chunk, encoding, cb) { - var state = this._writableState; - var ret = false; - var isBuf = _isUint8Array(chunk) && !state.objectMode; - - if (isBuf && !Buffer.isBuffer(chunk)) { - chunk = _uint8ArrayToBuffer(chunk); - } - - if (typeof encoding === 'function') { - cb = encoding; - encoding = null; - } - - if (isBuf) encoding = 'buffer';else if (!encoding) encoding = state.defaultEncoding; - - if (typeof cb !== 'function') cb = nop; - - if (state.ended) writeAfterEnd(this, cb);else if (isBuf || validChunk(this, state, chunk, cb)) { - state.pendingcb++; - ret = writeOrBuffer(this, state, isBuf, chunk, encoding, cb); - } - - return ret; -}; - -Writable.prototype.cork = function () { - var state = this._writableState; - - state.corked++; -}; - -Writable.prototype.uncork = function () { - var state = this._writableState; - - if (state.corked) { - state.corked--; - - if (!state.writing && !state.corked && !state.finished && !state.bufferProcessing && state.bufferedRequest) clearBuffer(this, state); - } -}; - -Writable.prototype.setDefaultEncoding = function setDefaultEncoding(encoding) { - // node::ParseEncoding() requires lower case. - if (typeof encoding === 'string') encoding = encoding.toLowerCase(); - if (!(['hex', 'utf8', 'utf-8', 'ascii', 'binary', 'base64', 'ucs2', 'ucs-2', 'utf16le', 'utf-16le', 'raw'].indexOf((encoding + '').toLowerCase()) > -1)) throw new TypeError('Unknown encoding: ' + encoding); - this._writableState.defaultEncoding = encoding; - return this; -}; - -function decodeChunk(state, chunk, encoding) { - if (!state.objectMode && state.decodeStrings !== false && typeof chunk === 'string') { - chunk = Buffer.from(chunk, encoding); - } - return chunk; -} - -// if we're already writing something, then just put this -// in the queue, and wait our turn. Otherwise, call _write -// If we return false, then we need a drain event, so set that flag. -function writeOrBuffer(stream, state, isBuf, chunk, encoding, cb) { - if (!isBuf) { - var newChunk = decodeChunk(state, chunk, encoding); - if (chunk !== newChunk) { - isBuf = true; - encoding = 'buffer'; - chunk = newChunk; - } - } - var len = state.objectMode ? 1 : chunk.length; - - state.length += len; - - var ret = state.length < state.highWaterMark; - // we must ensure that previous needDrain will not be reset to false. - if (!ret) state.needDrain = true; - - if (state.writing || state.corked) { - var last = state.lastBufferedRequest; - state.lastBufferedRequest = { - chunk: chunk, - encoding: encoding, - isBuf: isBuf, - callback: cb, - next: null - }; - if (last) { - last.next = state.lastBufferedRequest; - } else { - state.bufferedRequest = state.lastBufferedRequest; - } - state.bufferedRequestCount += 1; - } else { - doWrite(stream, state, false, len, chunk, encoding, cb); - } - - return ret; -} - -function doWrite(stream, state, writev, len, chunk, encoding, cb) { - state.writelen = len; - state.writecb = cb; - state.writing = true; - state.sync = true; - if (writev) stream._writev(chunk, state.onwrite);else stream._write(chunk, encoding, state.onwrite); - state.sync = false; -} - -function onwriteError(stream, state, sync, er, cb) { - --state.pendingcb; - - if (sync) { - // defer the callback if we are being called synchronously - // to avoid piling up things on the stack - processNextTick(cb, er); - // this can emit finish, and it will always happen - // after error - processNextTick(finishMaybe, stream, state); - stream._writableState.errorEmitted = true; - stream.emit('error', er); - } else { - // the caller expect this to happen before if - // it is async - cb(er); - stream._writableState.errorEmitted = true; - stream.emit('error', er); - // this can emit finish, but finish must - // always follow error - finishMaybe(stream, state); - } -} - -function onwriteStateUpdate(state) { - state.writing = false; - state.writecb = null; - state.length -= state.writelen; - state.writelen = 0; -} - -function onwrite(stream, er) { - var state = stream._writableState; - var sync = state.sync; - var cb = state.writecb; - - onwriteStateUpdate(state); - - if (er) onwriteError(stream, state, sync, er, cb);else { - // Check if we're actually ready to finish, but don't emit yet - var finished = needFinish(state); - - if (!finished && !state.corked && !state.bufferProcessing && state.bufferedRequest) { - clearBuffer(stream, state); - } - - if (sync) { - /**/ - asyncWrite(afterWrite, stream, state, finished, cb); - /**/ - } else { - afterWrite(stream, state, finished, cb); - } - } -} - -function afterWrite(stream, state, finished, cb) { - if (!finished) onwriteDrain(stream, state); - state.pendingcb--; - cb(); - finishMaybe(stream, state); -} - -// Must force callback to be called on nextTick, so that we don't -// emit 'drain' before the write() consumer gets the 'false' return -// value, and has a chance to attach a 'drain' listener. -function onwriteDrain(stream, state) { - if (state.length === 0 && state.needDrain) { - state.needDrain = false; - stream.emit('drain'); - } -} - -// if there's something in the buffer waiting, then process it -function clearBuffer(stream, state) { - state.bufferProcessing = true; - var entry = state.bufferedRequest; - - if (stream._writev && entry && entry.next) { - // Fast case, write everything using _writev() - var l = state.bufferedRequestCount; - var buffer = new Array(l); - var holder = state.corkedRequestsFree; - holder.entry = entry; - - var count = 0; - var allBuffers = true; - while (entry) { - buffer[count] = entry; - if (!entry.isBuf) allBuffers = false; - entry = entry.next; - count += 1; - } - buffer.allBuffers = allBuffers; - - doWrite(stream, state, true, state.length, buffer, '', holder.finish); - - // doWrite is almost always async, defer these to save a bit of time - // as the hot path ends with doWrite - state.pendingcb++; - state.lastBufferedRequest = null; - if (holder.next) { - state.corkedRequestsFree = holder.next; - holder.next = null; - } else { - state.corkedRequestsFree = new CorkedRequest(state); - } - } else { - // Slow case, write chunks one-by-one - while (entry) { - var chunk = entry.chunk; - var encoding = entry.encoding; - var cb = entry.callback; - var len = state.objectMode ? 1 : chunk.length; - - doWrite(stream, state, false, len, chunk, encoding, cb); - entry = entry.next; - // if we didn't call the onwrite immediately, then - // it means that we need to wait until it does. - // also, that means that the chunk and cb are currently - // being processed, so move the buffer counter past them. - if (state.writing) { - break; - } - } - - if (entry === null) state.lastBufferedRequest = null; - } - - state.bufferedRequestCount = 0; - state.bufferedRequest = entry; - state.bufferProcessing = false; -} - -Writable.prototype._write = function (chunk, encoding, cb) { - cb(new Error('_write() is not implemented')); -}; - -Writable.prototype._writev = null; - -Writable.prototype.end = function (chunk, encoding, cb) { - var state = this._writableState; - - if (typeof chunk === 'function') { - cb = chunk; - chunk = null; - encoding = null; - } else if (typeof encoding === 'function') { - cb = encoding; - encoding = null; - } - - if (chunk !== null && chunk !== undefined) this.write(chunk, encoding); - - // .end() fully uncorks - if (state.corked) { - state.corked = 1; - this.uncork(); - } - - // ignore unnecessary end() calls. - if (!state.ending && !state.finished) endWritable(this, state, cb); -}; - -function needFinish(state) { - return state.ending && state.length === 0 && state.bufferedRequest === null && !state.finished && !state.writing; -} -function callFinal(stream, state) { - stream._final(function (err) { - state.pendingcb--; - if (err) { - stream.emit('error', err); - } - state.prefinished = true; - stream.emit('prefinish'); - finishMaybe(stream, state); - }); -} -function prefinish(stream, state) { - if (!state.prefinished && !state.finalCalled) { - if (typeof stream._final === 'function') { - state.pendingcb++; - state.finalCalled = true; - processNextTick(callFinal, stream, state); - } else { - state.prefinished = true; - stream.emit('prefinish'); - } - } -} - -function finishMaybe(stream, state) { - var need = needFinish(state); - if (need) { - prefinish(stream, state); - if (state.pendingcb === 0) { - state.finished = true; - stream.emit('finish'); - } - } - return need; -} - -function endWritable(stream, state, cb) { - state.ending = true; - finishMaybe(stream, state); - if (cb) { - if (state.finished) processNextTick(cb);else stream.once('finish', cb); - } - state.ended = true; - stream.writable = false; -} - -function onCorkedFinish(corkReq, state, err) { - var entry = corkReq.entry; - corkReq.entry = null; - while (entry) { - var cb = entry.callback; - state.pendingcb--; - cb(err); - entry = entry.next; - } - if (state.corkedRequestsFree) { - state.corkedRequestsFree.next = corkReq; - } else { - state.corkedRequestsFree = corkReq; - } -} - -Object.defineProperty(Writable.prototype, 'destroyed', { - get: function () { - if (this._writableState === undefined) { - return false; - } - return this._writableState.destroyed; - }, - set: function (value) { - // we ignore the value if the stream - // has not been initialized yet - if (!this._writableState) { - return; - } - - // backward compatibility, the user is explicitly - // managing destroyed - this._writableState.destroyed = value; - } -}); - -Writable.prototype.destroy = destroyImpl.destroy; -Writable.prototype._undestroy = destroyImpl.undestroy; -Writable.prototype._destroy = function (err, cb) { - this.end(); - cb(err); -}; -}).call(this,require('_process'),typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {}) -},{"./_stream_duplex":35,"./internal/streams/destroy":41,"./internal/streams/stream":42,"_process":94,"core-util-is":7,"inherits":47,"process-nextick-args":93,"safe-buffer":101,"util-deprecate":126}],40:[function(require,module,exports){ -'use strict'; - -/**/ - -function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } } - -var Buffer = require('safe-buffer').Buffer; -/**/ - -function copyBuffer(src, target, offset) { - src.copy(target, offset); -} - -module.exports = function () { - function BufferList() { - _classCallCheck(this, BufferList); - - this.head = null; - this.tail = null; - this.length = 0; - } - - BufferList.prototype.push = function push(v) { - var entry = { data: v, next: null }; - if (this.length > 0) this.tail.next = entry;else this.head = entry; - this.tail = entry; - ++this.length; - }; - - BufferList.prototype.unshift = function unshift(v) { - var entry = { data: v, next: this.head }; - if (this.length === 0) this.tail = entry; - this.head = entry; - ++this.length; - }; - - BufferList.prototype.shift = function shift() { - if (this.length === 0) return; - var ret = this.head.data; - if (this.length === 1) this.head = this.tail = null;else this.head = this.head.next; - --this.length; - return ret; - }; - - BufferList.prototype.clear = function clear() { - this.head = this.tail = null; - this.length = 0; - }; - - BufferList.prototype.join = function join(s) { - if (this.length === 0) return ''; - var p = this.head; - var ret = '' + p.data; - while (p = p.next) { - ret += s + p.data; - }return ret; - }; - - BufferList.prototype.concat = function concat(n) { - if (this.length === 0) return Buffer.alloc(0); - if (this.length === 1) return this.head.data; - var ret = Buffer.allocUnsafe(n >>> 0); - var p = this.head; - var i = 0; - while (p) { - copyBuffer(p.data, ret, i); - i += p.data.length; - p = p.next; - } - return ret; - }; - - return BufferList; -}(); -},{"safe-buffer":101}],41:[function(require,module,exports){ -'use strict'; - -/**/ - -var processNextTick = require('process-nextick-args'); -/**/ - -// undocumented cb() API, needed for core, not for public API -function destroy(err, cb) { - var _this = this; - - var readableDestroyed = this._readableState && this._readableState.destroyed; - var writableDestroyed = this._writableState && this._writableState.destroyed; - - if (readableDestroyed || writableDestroyed) { - if (cb) { - cb(err); - } else if (err && (!this._writableState || !this._writableState.errorEmitted)) { - processNextTick(emitErrorNT, this, err); - } - return; - } - - // we set destroyed to true before firing error callbacks in order - // to make it re-entrance safe in case destroy() is called within callbacks - - if (this._readableState) { - this._readableState.destroyed = true; - } - - // if this is a duplex stream mark the writable part as destroyed as well - if (this._writableState) { - this._writableState.destroyed = true; - } - - this._destroy(err || null, function (err) { - if (!cb && err) { - processNextTick(emitErrorNT, _this, err); - if (_this._writableState) { - _this._writableState.errorEmitted = true; - } - } else if (cb) { - cb(err); - } - }); -} - -function undestroy() { - if (this._readableState) { - this._readableState.destroyed = false; - this._readableState.reading = false; - this._readableState.ended = false; - this._readableState.endEmitted = false; - } - - if (this._writableState) { - this._writableState.destroyed = false; - this._writableState.ended = false; - this._writableState.ending = false; - this._writableState.finished = false; - this._writableState.errorEmitted = false; - } -} - -function emitErrorNT(self, err) { - self.emit('error', err); -} - -module.exports = { - destroy: destroy, - undestroy: undestroy -}; -},{"process-nextick-args":93}],42:[function(require,module,exports){ -module.exports = require('events').EventEmitter; - -},{"events":12}],43:[function(require,module,exports){ -exports = module.exports = require('./lib/_stream_readable.js'); -exports.Stream = exports; -exports.Readable = exports; -exports.Writable = require('./lib/_stream_writable.js'); -exports.Duplex = require('./lib/_stream_duplex.js'); -exports.Transform = require('./lib/_stream_transform.js'); -exports.PassThrough = require('./lib/_stream_passthrough.js'); - -},{"./lib/_stream_duplex.js":35,"./lib/_stream_passthrough.js":36,"./lib/_stream_readable.js":37,"./lib/_stream_transform.js":38,"./lib/_stream_writable.js":39}],44:[function(require,module,exports){ -module.exports = require('./readable').Transform - -},{"./readable":43}],45:[function(require,module,exports){ -'use strict'; - -var Buffer = require('safe-buffer').Buffer; - -var isEncoding = Buffer.isEncoding || function (encoding) { - encoding = '' + encoding; - switch (encoding && encoding.toLowerCase()) { - case 'hex':case 'utf8':case 'utf-8':case 'ascii':case 'binary':case 'base64':case 'ucs2':case 'ucs-2':case 'utf16le':case 'utf-16le':case 'raw': - return true; - default: - return false; - } -}; - -function _normalizeEncoding(enc) { - if (!enc) return 'utf8'; - var retried; - while (true) { - switch (enc) { - case 'utf8': - case 'utf-8': - return 'utf8'; - case 'ucs2': - case 'ucs-2': - case 'utf16le': - case 'utf-16le': - return 'utf16le'; - case 'latin1': - case 'binary': - return 'latin1'; - case 'base64': - case 'ascii': - case 'hex': - return enc; - default: - if (retried) return; // undefined - enc = ('' + enc).toLowerCase(); - retried = true; - } - } -}; - -// Do not cache `Buffer.isEncoding` when checking encoding names as some -// modules monkey-patch it to support additional encodings -function normalizeEncoding(enc) { - var nenc = _normalizeEncoding(enc); - if (typeof nenc !== 'string' && (Buffer.isEncoding === isEncoding || !isEncoding(enc))) throw new Error('Unknown encoding: ' + enc); - return nenc || enc; -} - -// StringDecoder provides an interface for efficiently splitting a series of -// buffers into a series of JS strings without breaking apart multi-byte -// characters. -exports.StringDecoder = StringDecoder; -function StringDecoder(encoding) { - this.encoding = normalizeEncoding(encoding); - var nb; - switch (this.encoding) { - case 'utf16le': - this.text = utf16Text; - this.end = utf16End; - nb = 4; - break; - case 'utf8': - this.fillLast = utf8FillLast; - nb = 4; - break; - case 'base64': - this.text = base64Text; - this.end = base64End; - nb = 3; - break; - default: - this.write = simpleWrite; - this.end = simpleEnd; - return; - } - this.lastNeed = 0; - this.lastTotal = 0; - this.lastChar = Buffer.allocUnsafe(nb); -} - -StringDecoder.prototype.write = function (buf) { - if (buf.length === 0) return ''; - var r; - var i; - if (this.lastNeed) { - r = this.fillLast(buf); - if (r === undefined) return ''; - i = this.lastNeed; - this.lastNeed = 0; - } else { - i = 0; - } - if (i < buf.length) return r ? r + this.text(buf, i) : this.text(buf, i); - return r || ''; -}; - -StringDecoder.prototype.end = utf8End; - -// Returns only complete characters in a Buffer -StringDecoder.prototype.text = utf8Text; - -// Attempts to complete a partial non-UTF-8 character using bytes from a Buffer -StringDecoder.prototype.fillLast = function (buf) { - if (this.lastNeed <= buf.length) { - buf.copy(this.lastChar, this.lastTotal - this.lastNeed, 0, this.lastNeed); - return this.lastChar.toString(this.encoding, 0, this.lastTotal); - } - buf.copy(this.lastChar, this.lastTotal - this.lastNeed, 0, buf.length); - this.lastNeed -= buf.length; -}; - -// Checks the type of a UTF-8 byte, whether it's ASCII, a leading byte, or a -// continuation byte. -function utf8CheckByte(byte) { - if (byte <= 0x7F) return 0;else if (byte >> 5 === 0x06) return 2;else if (byte >> 4 === 0x0E) return 3;else if (byte >> 3 === 0x1E) return 4; - return -1; -} - -// Checks at most 3 bytes at the end of a Buffer in order to detect an -// incomplete multi-byte UTF-8 character. The total number of bytes (2, 3, or 4) -// needed to complete the UTF-8 character (if applicable) are returned. -function utf8CheckIncomplete(self, buf, i) { - var j = buf.length - 1; - if (j < i) return 0; - var nb = utf8CheckByte(buf[j]); - if (nb >= 0) { - if (nb > 0) self.lastNeed = nb - 1; - return nb; - } - if (--j < i) return 0; - nb = utf8CheckByte(buf[j]); - if (nb >= 0) { - if (nb > 0) self.lastNeed = nb - 2; - return nb; - } - if (--j < i) return 0; - nb = utf8CheckByte(buf[j]); - if (nb >= 0) { - if (nb > 0) { - if (nb === 2) nb = 0;else self.lastNeed = nb - 3; - } - return nb; - } - return 0; -} - -// Validates as many continuation bytes for a multi-byte UTF-8 character as -// needed or are available. If we see a non-continuation byte where we expect -// one, we "replace" the validated continuation bytes we've seen so far with -// UTF-8 replacement characters ('\ufffd'), to match v8's UTF-8 decoding -// behavior. The continuation byte check is included three times in the case -// where all of the continuation bytes for a character exist in the same buffer. -// It is also done this way as a slight performance increase instead of using a -// loop. -function utf8CheckExtraBytes(self, buf, p) { - if ((buf[0] & 0xC0) !== 0x80) { - self.lastNeed = 0; - return '\ufffd'.repeat(p); - } - if (self.lastNeed > 1 && buf.length > 1) { - if ((buf[1] & 0xC0) !== 0x80) { - self.lastNeed = 1; - return '\ufffd'.repeat(p + 1); - } - if (self.lastNeed > 2 && buf.length > 2) { - if ((buf[2] & 0xC0) !== 0x80) { - self.lastNeed = 2; - return '\ufffd'.repeat(p + 2); - } - } - } -} - -// Attempts to complete a multi-byte UTF-8 character using bytes from a Buffer. -function utf8FillLast(buf) { - var p = this.lastTotal - this.lastNeed; - var r = utf8CheckExtraBytes(this, buf, p); - if (r !== undefined) return r; - if (this.lastNeed <= buf.length) { - buf.copy(this.lastChar, p, 0, this.lastNeed); - return this.lastChar.toString(this.encoding, 0, this.lastTotal); - } - buf.copy(this.lastChar, p, 0, buf.length); - this.lastNeed -= buf.length; -} - -// Returns all complete UTF-8 characters in a Buffer. If the Buffer ended on a -// partial character, the character's bytes are buffered until the required -// number of bytes are available. -function utf8Text(buf, i) { - var total = utf8CheckIncomplete(this, buf, i); - if (!this.lastNeed) return buf.toString('utf8', i); - this.lastTotal = total; - var end = buf.length - (total - this.lastNeed); - buf.copy(this.lastChar, 0, end); - return buf.toString('utf8', i, end); -} - -// For UTF-8, a replacement character for each buffered byte of a (partial) -// character needs to be added to the output. -function utf8End(buf) { - var r = buf && buf.length ? this.write(buf) : ''; - if (this.lastNeed) return r + '\ufffd'.repeat(this.lastTotal - this.lastNeed); - return r; -} - -// UTF-16LE typically needs two bytes per character, but even if we have an even -// number of bytes available, we need to check if we end on a leading/high -// surrogate. In that case, we need to wait for the next two bytes in order to -// decode the last character properly. -function utf16Text(buf, i) { - if ((buf.length - i) % 2 === 0) { - var r = buf.toString('utf16le', i); - if (r) { - var c = r.charCodeAt(r.length - 1); - if (c >= 0xD800 && c <= 0xDBFF) { - this.lastNeed = 2; - this.lastTotal = 4; - this.lastChar[0] = buf[buf.length - 2]; - this.lastChar[1] = buf[buf.length - 1]; - return r.slice(0, -1); - } - } - return r; - } - this.lastNeed = 1; - this.lastTotal = 2; - this.lastChar[0] = buf[buf.length - 1]; - return buf.toString('utf16le', i, buf.length - 1); -} - -// For UTF-16LE we do not explicitly append special replacement characters if we -// end on a partial character, we simply let v8 handle that. -function utf16End(buf) { - var r = buf && buf.length ? this.write(buf) : ''; - if (this.lastNeed) { - var end = this.lastTotal - this.lastNeed; - return r + this.lastChar.toString('utf16le', 0, end); - } - return r; -} - -function base64Text(buf, i) { - var n = (buf.length - i) % 3; - if (n === 0) return buf.toString('base64', i); - this.lastNeed = 3 - n; - this.lastTotal = 3; - if (n === 1) { - this.lastChar[0] = buf[buf.length - 1]; - } else { - this.lastChar[0] = buf[buf.length - 2]; - this.lastChar[1] = buf[buf.length - 1]; - } - return buf.toString('base64', i, buf.length - n); -} - -function base64End(buf) { - var r = buf && buf.length ? this.write(buf) : ''; - if (this.lastNeed) return r + this.lastChar.toString('base64', 0, 3 - this.lastNeed); - return r; -} - -// Pass bytes on through for single-byte encodings (e.g. ascii, latin1, hex) -function simpleWrite(buf) { - return buf.toString(this.encoding); -} - -function simpleEnd(buf) { - return buf && buf.length ? this.write(buf) : ''; -} -},{"safe-buffer":101}],46:[function(require,module,exports){ +},{"./lib/_stream_duplex.js":39,"./lib/_stream_passthrough.js":40,"./lib/_stream_readable.js":41,"./lib/_stream_transform.js":42,"./lib/_stream_writable.js":43,"_process":94,"stream":111}],45:[function(require,module,exports){ +arguments[4][18][0].apply(exports,arguments) +},{"buffer":7,"dup":18}],46:[function(require,module,exports){ exports.read = function (buffer, offset, isLE, mLen, nBytes) { var e, m var eLen = nBytes * 8 - mLen - 1 @@ -10537,11 +9927,8 @@ function isSlowBuffer (obj) { } },{}],50:[function(require,module,exports){ -module.exports = Array.isArray || function (arr) { - return Object.prototype.toString.call(arr) == '[object Array]'; -}; - -},{}],51:[function(require,module,exports){ +arguments[4][8][0].apply(exports,arguments) +},{"dup":8}],51:[function(require,module,exports){ /*! * jQuery JavaScript Library v2.2.4 * http://jquery.com/ @@ -23109,9 +22496,9 @@ Mime.prototype.define = function (map) { for (var type in map) { var exts = map[type]; for (var i = 0; i < exts.length; i++) { - if (process.env.DEBUG_MIME && this.types[exts[i]]) { - console.warn((this._loading || "define()").replace(/.*\//, ''), 'changes "' + exts[i] + '" extension type from ' + - this.types[exts[i]] + ' to ' + type); + if (process.env.DEBUG_MIME && this.types[exts]) { + console.warn(this._loading.replace(/.*\//, ''), 'changes "' + exts[i] + '" extension type from ' + + this.types[exts] + ' to ' + type); } this.types[exts[i]] = type; @@ -23154,7 +22541,7 @@ Mime.prototype.load = function(file) { * Lookup a mime type based on extension */ Mime.prototype.lookup = function(path, fallback) { - var ext = path.replace(/^.*[\.\/\\]/, '').toLowerCase(); + var ext = path.replace(/.*[\.\/\\]/, '').toLowerCase(); return this.types[ext] || fallback || this.default_type; }; @@ -23188,15 +22575,15 @@ mime.Mime = Mime; mime.charsets = { lookup: function(mimeType, fallback) { // Assume text types are utf8 - return (/^text\/|^application\/(javascript|json)/).test(mimeType) ? 'UTF-8' : fallback; + return (/^text\//).test(mimeType) ? 'UTF-8' : fallback; } }; module.exports = mime; }).call(this,require('_process')) -},{"./types.json":54,"_process":94,"fs":33,"path":71}],54:[function(require,module,exports){ 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},{}],55:[function(require,module,exports){ "use strict" @@ -23661,7 +23048,7 @@ exports.equals = compile({ -},{"cwise-compiler":8}],56:[function(require,module,exports){ +},{"cwise-compiler":20}],56:[function(require,module,exports){ "use strict" var ndarray = require("ndarray") @@ -23687,7 +23074,7 @@ module.exports = function convert(arr, result) { },{"./doConvert.js":57,"ndarray":58}],57:[function(require,module,exports){ module.exports=require('cwise-compiler')({"args":["array","scalar","index"],"pre":{"body":"{}","args":[],"thisVars":[],"localVars":[]},"body":{"body":"{\nvar _inline_1_v=_inline_1_arg1_,_inline_1_i\nfor(_inline_1_i=0;_inline_1_i<_inline_1_arg2_.length-1;++_inline_1_i) {\n_inline_1_v=_inline_1_v[_inline_1_arg2_[_inline_1_i]]\n}\n_inline_1_arg0_=_inline_1_v[_inline_1_arg2_[_inline_1_arg2_.length-1]]\n}","args":[{"name":"_inline_1_arg0_","lvalue":true,"rvalue":false,"count":1},{"name":"_inline_1_arg1_","lvalue":false,"rvalue":true,"count":1},{"name":"_inline_1_arg2_","lvalue":false,"rvalue":true,"count":4}],"thisVars":[],"localVars":["_inline_1_i","_inline_1_v"]},"post":{"body":"{}","args":[],"thisVars":[],"localVars":[]},"funcName":"convert","blockSize":64}) -},{"cwise-compiler":8}],58:[function(require,module,exports){ +},{"cwise-compiler":20}],58:[function(require,module,exports){ var iota = require("iota-array") var isBuffer = require("is-buffer") @@ -30777,7 +30164,7 @@ exports.dataToBitMap = function(data, bitmapInfo) { }; }).call(this,require("buffer").Buffer) -},{"./interlace":82,"buffer":5}],73:[function(require,module,exports){ +},{"./interlace":82,"buffer":7}],73:[function(require,module,exports){ (function (Buffer){ 'use strict'; @@ -30845,7 +30232,7 @@ module.exports = function(data, width, height, options) { }; }).call(this,require("buffer").Buffer) -},{"./constants":75,"buffer":5}],74:[function(require,module,exports){ +},{"./constants":75,"buffer":7}],74:[function(require,module,exports){ (function (process,Buffer){ 'use strict'; @@ -31058,7 +30445,7 @@ ChunkStream.prototype._process = function() { }; }).call(this,require('_process'),require("buffer").Buffer) -},{"_process":94,"buffer":5,"stream":106,"util":129}],75:[function(require,module,exports){ +},{"_process":94,"buffer":7,"stream":111,"util":119}],75:[function(require,module,exports){ 'use strict'; @@ -31327,7 +30714,7 @@ module.exports = function(pxData, width, height, options, bpp) { }; }).call(this,require("buffer").Buffer) -},{"./paeth-predictor":86,"buffer":5}],78:[function(require,module,exports){ +},{"./paeth-predictor":86,"buffer":7}],78:[function(require,module,exports){ (function (Buffer){ 'use strict'; @@ -31356,7 +30743,7 @@ var FilterAsync = module.exports = function(bitmapInfo) { util.inherits(FilterAsync, ChunkStream); }).call(this,require("buffer").Buffer) -},{"./chunkstream":74,"./filter-parse":80,"buffer":5,"util":129}],79:[function(require,module,exports){ +},{"./chunkstream":74,"./filter-parse":80,"buffer":7,"util":119}],79:[function(require,module,exports){ (function (Buffer){ 'use strict'; @@ -31383,7 +30770,7 @@ exports.process = function(inBuffer, bitmapInfo) { return Buffer.concat(outBuffers); }; }).call(this,require("buffer").Buffer) -},{"./filter-parse":80,"./sync-reader":92,"buffer":5}],80:[function(require,module,exports){ +},{"./filter-parse":80,"./sync-reader":92,"buffer":7}],80:[function(require,module,exports){ (function (Buffer){ 'use strict'; @@ -31558,7 +30945,7 @@ Filter.prototype._reverseFilterLine = function(rawData) { }; }).call(this,require("buffer").Buffer) -},{"./interlace":82,"./paeth-predictor":86,"buffer":5}],81:[function(require,module,exports){ +},{"./interlace":82,"./paeth-predictor":86,"buffer":7}],81:[function(require,module,exports){ (function (Buffer){ 'use strict'; @@ -31651,7 +31038,7 @@ module.exports = function(indata, imageData) { }; }).call(this,require("buffer").Buffer) -},{"buffer":5}],82:[function(require,module,exports){ +},{"buffer":7}],82:[function(require,module,exports){ 'use strict'; // Adam 7 @@ -31788,7 +31175,7 @@ PackerAsync.prototype.pack = function(data, width, height, gamma) { }; }).call(this,require("buffer").Buffer) -},{"./constants":75,"./packer":85,"buffer":5,"stream":106,"util":129}],84:[function(require,module,exports){ +},{"./constants":75,"./packer":85,"buffer":7,"stream":111,"util":119}],84:[function(require,module,exports){ (function (Buffer){ 'use strict'; @@ -31840,7 +31227,7 @@ module.exports = function(metaData, opt) { }; }).call(this,require("buffer").Buffer) -},{"./constants":75,"./packer":85,"buffer":5,"zlib":4}],85:[function(require,module,exports){ +},{"./constants":75,"./packer":85,"buffer":7,"zlib":5}],85:[function(require,module,exports){ (function (Buffer){ 'use strict'; @@ -31935,7 +31322,7 @@ Packer.prototype.packIEND = function() { return this._packChunk(constants.TYPE_IEND, null); }; }).call(this,require("buffer").Buffer) -},{"./bitpacker":73,"./constants":75,"./crc":76,"./filter-pack":77,"buffer":5,"zlib":4}],86:[function(require,module,exports){ +},{"./bitpacker":73,"./constants":75,"./crc":76,"./filter-pack":77,"buffer":7,"zlib":5}],86:[function(require,module,exports){ 'use strict'; module.exports = function paethPredictor(left, above, upLeft) { @@ -32065,7 +31452,7 @@ ParserAsync.prototype._complete = function(filteredData) { this.emit('parsed', normalisedBitmapData); }; -},{"./bitmapper":72,"./chunkstream":74,"./filter-parse-async":78,"./format-normaliser":81,"./parser":89,"util":129,"zlib":4}],88:[function(require,module,exports){ +},{"./bitmapper":72,"./chunkstream":74,"./filter-parse-async":78,"./format-normaliser":81,"./parser":89,"util":119,"zlib":5}],88:[function(require,module,exports){ (function (Buffer){ 'use strict'; @@ -32160,7 +31547,7 @@ module.exports = function(buffer, options) { }; }).call(this,require("buffer").Buffer) -},{"./bitmapper":72,"./filter-parse-sync":79,"./format-normaliser":81,"./parser":89,"./sync-reader":92,"buffer":5,"zlib":4}],89:[function(require,module,exports){ +},{"./bitmapper":72,"./filter-parse-sync":79,"./format-normaliser":81,"./parser":89,"./sync-reader":92,"buffer":7,"zlib":5}],89:[function(require,module,exports){ (function (Buffer){ 'use strict'; @@ -32454,7 +31841,7 @@ Parser.prototype._parseIEND = function(data) { }; }).call(this,require("buffer").Buffer) -},{"./constants":75,"./crc":76,"buffer":5}],90:[function(require,module,exports){ +},{"./constants":75,"./crc":76,"buffer":7}],90:[function(require,module,exports){ 'use strict'; @@ -32639,7 +32026,7 @@ PNG.prototype.adjustGamma = function() { }; }).call(this,require('_process'),require("buffer").Buffer) -},{"./packer-async":83,"./parser-async":87,"./png-sync":90,"_process":94,"buffer":5,"stream":106,"util":129}],92:[function(require,module,exports){ +},{"./packer-async":83,"./parser-async":87,"./png-sync":90,"_process":94,"buffer":7,"stream":111,"util":119}],92:[function(require,module,exports){ 'use strict'; var SyncReader = module.exports = function(buffer) { @@ -32926,92 +32313,218 @@ process.chdir = function (dir) { process.umask = function() { return 0; }; },{}],95:[function(require,module,exports){ -arguments[4][26][0].apply(exports,arguments) -},{"./_stream_readable":97,"./_stream_writable":99,"_process":94,"core-util-is":7,"dup":26,"inherits":47}],96:[function(require,module,exports){ -arguments[4][27][0].apply(exports,arguments) -},{"./_stream_transform":98,"core-util-is":7,"dup":27,"inherits":47}],97:[function(require,module,exports){ -(function (process){ -// Copyright Joyent, Inc. and other Node contributors. -// -// Permission is hereby granted, free of charge, to any person obtaining a -// copy of this software and associated documentation files (the -// "Software"), to deal in the Software without restriction, including -// without limitation the rights to use, copy, modify, merge, publish, -// distribute, sublicense, and/or sell copies of the Software, and to permit -// persons to whom the Software is furnished to do so, subject to the -// following conditions: -// -// The above copyright notice and this permission notice shall be included -// in all copies or substantial portions of the Software. -// -// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS -// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF -// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN -// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, -// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR -// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE -// USE OR OTHER DEALINGS IN THE SOFTWARE. +module.exports = require('./lib/_stream_duplex.js'); -module.exports = Readable; +},{"./lib/_stream_duplex.js":96}],96:[function(require,module,exports){ +// a duplex stream is just a stream that is both readable and writable. +// Since JS doesn't have multiple prototypal inheritance, this class +// prototypally inherits from Readable, and then parasitically from +// Writable. + +'use strict'; /**/ -var isArray = require('isarray'); -/**/ - -/**/ -var Buffer = require('buffer').Buffer; -/**/ - -Readable.ReadableState = ReadableState; - -var EE = require('events').EventEmitter; - -/**/ -if (!EE.listenerCount) EE.listenerCount = function(emitter, type) { - return emitter.listeners(type).length; +var objectKeys = Object.keys || function (obj) { + var keys = []; + for (var key in obj) { + keys.push(key); + }return keys; }; /**/ -var Stream = require('stream'); +module.exports = Duplex; + +/**/ +var processNextTick = require('process-nextick-args'); +/**/ /**/ var util = require('core-util-is'); util.inherits = require('inherits'); /**/ +var Readable = require('./_stream_readable'); +var Writable = require('./_stream_writable'); + +util.inherits(Duplex, Readable); + +var keys = objectKeys(Writable.prototype); +for (var v = 0; v < keys.length; v++) { + var method = keys[v]; + if (!Duplex.prototype[method]) Duplex.prototype[method] = Writable.prototype[method]; +} + +function Duplex(options) { + if (!(this instanceof Duplex)) return new Duplex(options); + + Readable.call(this, options); + Writable.call(this, options); + + if (options && options.readable === false) this.readable = false; + + if (options && options.writable === false) this.writable = false; + + this.allowHalfOpen = true; + if (options && options.allowHalfOpen === false) this.allowHalfOpen = false; + + this.once('end', onend); +} + +// the no-half-open enforcer +function onend() { + // if we allow half-open state, or if the writable side ended, + // then we're ok. + if (this.allowHalfOpen || this._writableState.ended) return; + + // no more data can be written. + // But allow more writes to happen in this tick. + processNextTick(onEndNT, this); +} + +function onEndNT(self) { + self.end(); +} + +function forEach(xs, f) { + for (var i = 0, l = xs.length; i < l; i++) { + f(xs[i], i); + } +} +},{"./_stream_readable":98,"./_stream_writable":100,"core-util-is":19,"inherits":47,"process-nextick-args":93}],97:[function(require,module,exports){ +// a passthrough stream. +// basically just the most minimal sort of Transform stream. +// Every written chunk gets output as-is. + +'use strict'; + +module.exports = PassThrough; + +var Transform = require('./_stream_transform'); + +/**/ +var util = require('core-util-is'); +util.inherits = require('inherits'); +/**/ + +util.inherits(PassThrough, Transform); + +function PassThrough(options) { + if (!(this instanceof PassThrough)) return new PassThrough(options); + + Transform.call(this, options); +} + +PassThrough.prototype._transform = function (chunk, encoding, cb) { + cb(null, chunk); +}; +},{"./_stream_transform":99,"core-util-is":19,"inherits":47}],98:[function(require,module,exports){ +(function (process){ +'use strict'; + +module.exports = Readable; + +/**/ +var processNextTick = require('process-nextick-args'); +/**/ + +/**/ +var isArray = require('isarray'); +/**/ + +/**/ +var Duplex; +/**/ + +Readable.ReadableState = ReadableState; + +/**/ +var EE = require('events').EventEmitter; + +var EElistenerCount = function (emitter, type) { + return emitter.listeners(type).length; +}; +/**/ + +/**/ +var Stream = require('./internal/streams/stream'); +/**/ + +var Buffer = require('buffer').Buffer; +/**/ +var bufferShim = require('buffer-shims'); +/**/ + +/**/ +var util = require('core-util-is'); +util.inherits = require('inherits'); +/**/ + +/**/ +var debugUtil = require('util'); +var debug = void 0; +if (debugUtil && debugUtil.debuglog) { + debug = debugUtil.debuglog('stream'); +} else { + debug = function () {}; +} +/**/ + +var BufferList = require('./internal/streams/BufferList'); var StringDecoder; util.inherits(Readable, Stream); +var kProxyEvents = ['error', 'close', 'destroy', 'pause', 'resume']; + +function prependListener(emitter, event, fn) { + // Sadly this is not cacheable as some libraries bundle their own + // event emitter implementation with them. + if (typeof emitter.prependListener === 'function') { + return emitter.prependListener(event, fn); + } else { + // This is a hack to make sure that our error handler is attached before any + // userland ones. NEVER DO THIS. This is here only because this code needs + // to continue to work with older versions of Node.js that do not include + // the prependListener() method. The goal is to eventually remove this hack. + if (!emitter._events || !emitter._events[event]) emitter.on(event, fn);else if (isArray(emitter._events[event])) emitter._events[event].unshift(fn);else emitter._events[event] = [fn, emitter._events[event]]; + } +} + function ReadableState(options, stream) { + Duplex = Duplex || require('./_stream_duplex'); + options = options || {}; + // object stream flag. Used to make read(n) ignore n and to + // make all the buffer merging and length checks go away + this.objectMode = !!options.objectMode; + + if (stream instanceof Duplex) this.objectMode = this.objectMode || !!options.readableObjectMode; + // the point at which it stops calling _read() to fill the buffer // Note: 0 is a valid value, means "don't call _read preemptively ever" var hwm = options.highWaterMark; - this.highWaterMark = (hwm || hwm === 0) ? hwm : 16 * 1024; + var defaultHwm = this.objectMode ? 16 : 16 * 1024; + this.highWaterMark = hwm || hwm === 0 ? hwm : defaultHwm; // cast to ints. this.highWaterMark = ~~this.highWaterMark; - this.buffer = []; + // A linked list is used to store data chunks instead of an array because the + // linked list can remove elements from the beginning faster than + // array.shift() + this.buffer = new BufferList(); this.length = 0; this.pipes = null; this.pipesCount = 0; - this.flowing = false; + this.flowing = null; this.ended = false; this.endEmitted = false; this.reading = false; - // In streams that never have any data, and do push(null) right away, - // the consumer can miss the 'end' event if they do some I/O before - // consuming the stream. So, we don't emit('end') until some reading - // happens. - this.calledRead = false; - // a flag to be able to tell if the onwrite cb is called immediately, - // or on a later tick. We set this to true at first, becuase any + // or on a later tick. We set this to true at first, because any // actions that shouldn't happen until "later" should generally also // not happen before the first write call. this.sync = true; @@ -33021,11 +32534,7 @@ function ReadableState(options, stream) { this.needReadable = false; this.emittedReadable = false; this.readableListening = false; - - - // object stream flag. Used to make read(n) ignore n and to - // make all the buffer merging and length checks go away - this.objectMode = !!options.objectMode; + this.resumeScheduled = false; // Crypto is kind of old and crusty. Historically, its default string // encoding is 'binary' so we have to make this configurable. @@ -33045,22 +32554,24 @@ function ReadableState(options, stream) { this.decoder = null; this.encoding = null; if (options.encoding) { - if (!StringDecoder) - StringDecoder = require('string_decoder/').StringDecoder; + if (!StringDecoder) StringDecoder = require('string_decoder/').StringDecoder; this.decoder = new StringDecoder(options.encoding); this.encoding = options.encoding; } } function Readable(options) { - if (!(this instanceof Readable)) - return new Readable(options); + Duplex = Duplex || require('./_stream_duplex'); + + if (!(this instanceof Readable)) return new Readable(options); this._readableState = new ReadableState(options, this); // legacy this.readable = true; + if (options && typeof options.read === 'function') this._read = options.read; + Stream.call(this); } @@ -33068,13 +32579,13 @@ function Readable(options) { // This returns true if the highWaterMark has not been hit yet, // similar to how Writable.write() returns true if you should // write() some more. -Readable.prototype.push = function(chunk, encoding) { +Readable.prototype.push = function (chunk, encoding) { var state = this._readableState; - if (typeof chunk === 'string' && !state.objectMode) { + if (!state.objectMode && typeof chunk === 'string') { encoding = encoding || state.defaultEncoding; if (encoding !== state.encoding) { - chunk = new Buffer(chunk, encoding); + chunk = bufferShim.from(chunk, encoding); encoding = ''; } } @@ -33083,41 +32594,53 @@ Readable.prototype.push = function(chunk, encoding) { }; // Unshift should *always* be something directly out of read() -Readable.prototype.unshift = function(chunk) { +Readable.prototype.unshift = function (chunk) { var state = this._readableState; return readableAddChunk(this, state, chunk, '', true); }; +Readable.prototype.isPaused = function () { + return this._readableState.flowing === false; +}; + function readableAddChunk(stream, state, chunk, encoding, addToFront) { var er = chunkInvalid(state, chunk); if (er) { stream.emit('error', er); - } else if (chunk === null || chunk === undefined) { + } else if (chunk === null) { state.reading = false; - if (!state.ended) - onEofChunk(stream, state); + onEofChunk(stream, state); } else if (state.objectMode || chunk && chunk.length > 0) { if (state.ended && !addToFront) { var e = new Error('stream.push() after EOF'); stream.emit('error', e); } else if (state.endEmitted && addToFront) { - var e = new Error('stream.unshift() after end event'); - stream.emit('error', e); + var _e = new Error('stream.unshift() after end event'); + stream.emit('error', _e); } else { - if (state.decoder && !addToFront && !encoding) + var skipAdd; + if (state.decoder && !addToFront && !encoding) { chunk = state.decoder.write(chunk); - - // update the buffer info. - state.length += state.objectMode ? 1 : chunk.length; - if (addToFront) { - state.buffer.unshift(chunk); - } else { - state.reading = false; - state.buffer.push(chunk); + skipAdd = !state.objectMode && chunk.length === 0; } - if (state.needReadable) - emitReadable(stream); + if (!addToFront) state.reading = false; + + // Don't add to the buffer if we've decoded to an empty string chunk and + // we're not in object mode + if (!skipAdd) { + // if we want the data now, just emit it. + if (state.flowing && state.length === 0 && !state.sync) { + stream.emit('data', chunk); + stream.read(0); + } else { + // update the buffer info. + state.length += state.objectMode ? 1 : chunk.length; + if (addToFront) state.buffer.unshift(chunk);else state.buffer.push(chunk); + + if (state.needReadable) emitReadable(stream); + } + } maybeReadMore(stream, state); } @@ -33128,8 +32651,6 @@ function readableAddChunk(stream, state, chunk, encoding, addToFront) { return needMoreData(state); } - - // if it's past the high water mark, we can push in some more. // Also, if we have no data yet, we can stand some // more bytes. This is to work around cases where hwm=0, @@ -33138,88 +32659,71 @@ function readableAddChunk(stream, state, chunk, encoding, addToFront) { // needReadable was set, then we ought to push more, so that another // 'readable' event will be triggered. function needMoreData(state) { - return !state.ended && - (state.needReadable || - state.length < state.highWaterMark || - state.length === 0); + return !state.ended && (state.needReadable || state.length < state.highWaterMark || state.length === 0); } // backwards compatibility. -Readable.prototype.setEncoding = function(enc) { - if (!StringDecoder) - StringDecoder = require('string_decoder/').StringDecoder; +Readable.prototype.setEncoding = function (enc) { + if (!StringDecoder) StringDecoder = require('string_decoder/').StringDecoder; this._readableState.decoder = new StringDecoder(enc); this._readableState.encoding = enc; + return this; }; -// Don't raise the hwm > 128MB +// Don't raise the hwm > 8MB var MAX_HWM = 0x800000; -function roundUpToNextPowerOf2(n) { +function computeNewHighWaterMark(n) { if (n >= MAX_HWM) { n = MAX_HWM; } else { - // Get the next highest power of 2 + // Get the next highest power of 2 to prevent increasing hwm excessively in + // tiny amounts n--; - for (var p = 1; p < 32; p <<= 1) n |= n >> p; + n |= n >>> 1; + n |= n >>> 2; + n |= n >>> 4; + n |= n >>> 8; + n |= n >>> 16; n++; } return n; } +// This function is designed to be inlinable, so please take care when making +// changes to the function body. function howMuchToRead(n, state) { - if (state.length === 0 && state.ended) - return 0; - - if (state.objectMode) - return n === 0 ? 0 : 1; - - if (n === null || isNaN(n)) { - // only flow one buffer at a time - if (state.flowing && state.buffer.length) - return state.buffer[0].length; - else - return state.length; + if (n <= 0 || state.length === 0 && state.ended) return 0; + if (state.objectMode) return 1; + if (n !== n) { + // Only flow one buffer at a time + if (state.flowing && state.length) return state.buffer.head.data.length;else return state.length; } - - if (n <= 0) + // If we're asking for more than the current hwm, then raise the hwm. + if (n > state.highWaterMark) state.highWaterMark = computeNewHighWaterMark(n); + if (n <= state.length) return n; + // Don't have enough + if (!state.ended) { + state.needReadable = true; return 0; - - // If we're asking for more than the target buffer level, - // then raise the water mark. Bump up to the next highest - // power of 2, to prevent increasing it excessively in tiny - // amounts. - if (n > state.highWaterMark) - state.highWaterMark = roundUpToNextPowerOf2(n); - - // don't have that much. return null, unless we've ended. - if (n > state.length) { - if (!state.ended) { - state.needReadable = true; - return 0; - } else - return state.length; } - - return n; + return state.length; } // you can override either this method, or the async _read(n) below. -Readable.prototype.read = function(n) { +Readable.prototype.read = function (n) { + debug('read', n); + n = parseInt(n, 10); var state = this._readableState; - state.calledRead = true; var nOrig = n; - var ret; - if (typeof n !== 'number' || n > 0) - state.emittedReadable = false; + if (n !== 0) state.emittedReadable = false; // if we're doing read(0) to trigger a readable event, but we // already have a bunch of data in the buffer, then just trigger // the 'readable' event and move on. - if (n === 0 && - state.needReadable && - (state.length >= state.highWaterMark || state.ended)) { - emitReadable(this); + if (n === 0 && state.needReadable && (state.length >= state.highWaterMark || state.ended)) { + debug('read: emitReadable', state.length, state.ended); + if (state.length === 0 && state.ended) endReadable(this);else emitReadable(this); return null; } @@ -33227,28 +32731,8 @@ Readable.prototype.read = function(n) { // if we've ended, and we're now clear, then finish it up. if (n === 0 && state.ended) { - ret = null; - - // In cases where the decoder did not receive enough data - // to produce a full chunk, then immediately received an - // EOF, state.buffer will contain [, ]. - // howMuchToRead will see this and coerce the amount to - // read to zero (because it's looking at the length of the - // first in state.buffer), and we'll end up here. - // - // This can only happen via state.decoder -- no other venue - // exists for pushing a zero-length chunk into state.buffer - // and triggering this behavior. In this case, we return our - // remaining data and end the stream, if appropriate. - if (state.length > 0 && state.decoder) { - ret = fromList(n, state); - state.length -= ret.length; - } - - if (state.length === 0) - endReadable(this); - - return ret; + if (state.length === 0) endReadable(this); + return null; } // All the actual chunk generation logic needs to be @@ -33275,74 +32759,68 @@ Readable.prototype.read = function(n) { // if we need a readable event, then we need to do some reading. var doRead = state.needReadable; + debug('need readable', doRead); // if we currently have less than the highWaterMark, then also read some - if (state.length - n <= state.highWaterMark) + if (state.length === 0 || state.length - n < state.highWaterMark) { doRead = true; + debug('length less than watermark', doRead); + } // however, if we've ended, then there's no point, and if we're already // reading, then it's unnecessary. - if (state.ended || state.reading) + if (state.ended || state.reading) { doRead = false; - - if (doRead) { + debug('reading or ended', doRead); + } else if (doRead) { + debug('do read'); state.reading = true; state.sync = true; // if the length is currently zero, then we *need* a readable event. - if (state.length === 0) - state.needReadable = true; + if (state.length === 0) state.needReadable = true; // call internal read method this._read(state.highWaterMark); state.sync = false; + // If _read pushed data synchronously, then `reading` will be false, + // and we need to re-evaluate how much data we can return to the user. + if (!state.reading) n = howMuchToRead(nOrig, state); } - // If _read called its callback synchronously, then `reading` - // will be false, and we need to re-evaluate how much data we - // can return to the user. - if (doRead && !state.reading) - n = howMuchToRead(nOrig, state); - - if (n > 0) - ret = fromList(n, state); - else - ret = null; + var ret; + if (n > 0) ret = fromList(n, state);else ret = null; if (ret === null) { state.needReadable = true; n = 0; + } else { + state.length -= n; } - state.length -= n; + if (state.length === 0) { + // If we have nothing in the buffer, then we want to know + // as soon as we *do* get something into the buffer. + if (!state.ended) state.needReadable = true; - // If we have nothing in the buffer, then we want to know - // as soon as we *do* get something into the buffer. - if (state.length === 0 && !state.ended) - state.needReadable = true; + // If we tried to read() past the EOF, then emit end on the next tick. + if (nOrig !== n && state.ended) endReadable(this); + } - // If we happened to read() exactly the remaining amount in the - // buffer, and the EOF has been seen at this point, then make sure - // that we emit 'end' on the very next tick. - if (state.ended && !state.endEmitted && state.length === 0) - endReadable(this); + if (ret !== null) this.emit('data', ret); return ret; }; function chunkInvalid(state, chunk) { var er = null; - if (!Buffer.isBuffer(chunk) && - 'string' !== typeof chunk && - chunk !== null && - chunk !== undefined && - !state.objectMode) { + if (!Buffer.isBuffer(chunk) && typeof chunk !== 'string' && chunk !== null && chunk !== undefined && !state.objectMode) { er = new TypeError('Invalid non-string/buffer chunk'); } return er; } - function onEofChunk(stream, state) { - if (state.decoder && !state.ended) { + if (state.ended) return; + if (state.decoder) { var chunk = state.decoder.end(); if (chunk && chunk.length) { state.buffer.push(chunk); @@ -33351,12 +32829,8 @@ function onEofChunk(stream, state) { } state.ended = true; - // if we've ended and we have some data left, then emit - // 'readable' now to make sure it gets picked up. - if (state.length > 0) - emitReadable(stream); - else - endReadable(stream); + // emit 'readable' now to make sure it gets picked up. + emitReadable(stream); } // Don't emit readable right away in sync mode, because this can trigger @@ -33365,23 +32839,19 @@ function onEofChunk(stream, state) { function emitReadable(stream) { var state = stream._readableState; state.needReadable = false; - if (state.emittedReadable) - return; - - state.emittedReadable = true; - if (state.sync) - process.nextTick(function() { - emitReadable_(stream); - }); - else - emitReadable_(stream); + if (!state.emittedReadable) { + debug('emitReadable', state.flowing); + state.emittedReadable = true; + if (state.sync) processNextTick(emitReadable_, stream);else emitReadable_(stream); + } } function emitReadable_(stream) { + debug('emit readable'); stream.emit('readable'); + flow(stream); } - // at this point, the user has presumably seen the 'readable' event, // and called read() to consume some data. that may have triggered // in turn another _read(n) call, in which case reading = true if @@ -33391,22 +32861,18 @@ function emitReadable_(stream) { function maybeReadMore(stream, state) { if (!state.readingMore) { state.readingMore = true; - process.nextTick(function() { - maybeReadMore_(stream, state); - }); + processNextTick(maybeReadMore_, stream, state); } } function maybeReadMore_(stream, state) { var len = state.length; - while (!state.reading && !state.flowing && !state.ended && - state.length < state.highWaterMark) { + while (!state.reading && !state.flowing && !state.ended && state.length < state.highWaterMark) { + debug('maybeReadMore read 0'); stream.read(0); if (len === state.length) // didn't get any data, stop spinning. - break; - else - len = state.length; + break;else len = state.length; } state.readingMore = false; } @@ -33415,11 +32881,11 @@ function maybeReadMore_(stream, state) { // call cb(er, data) where data is <= n in length. // for virtual (non-string, non-buffer) streams, "length" is somewhat // arbitrary, and perhaps not very meaningful. -Readable.prototype._read = function(n) { - this.emit('error', new Error('not implemented')); +Readable.prototype._read = function (n) { + this.emit('error', new Error('_read() is not implemented')); }; -Readable.prototype.pipe = function(dest, pipeOpts) { +Readable.prototype.pipe = function (dest, pipeOpts) { var src = this; var state = this._readableState; @@ -33435,24 +32901,23 @@ Readable.prototype.pipe = function(dest, pipeOpts) { break; } state.pipesCount += 1; + debug('pipe count=%d opts=%j', state.pipesCount, pipeOpts); - var doEnd = (!pipeOpts || pipeOpts.end !== false) && - dest !== process.stdout && - dest !== process.stderr; + var doEnd = (!pipeOpts || pipeOpts.end !== false) && dest !== process.stdout && dest !== process.stderr; var endFn = doEnd ? onend : cleanup; - if (state.endEmitted) - process.nextTick(endFn); - else - src.once('end', endFn); + if (state.endEmitted) processNextTick(endFn);else src.once('end', endFn); dest.on('unpipe', onunpipe); function onunpipe(readable) { - if (readable !== src) return; - cleanup(); + debug('onunpipe'); + if (readable === src) { + cleanup(); + } } function onend() { + debug('onend'); dest.end(); } @@ -33463,7 +32928,9 @@ Readable.prototype.pipe = function(dest, pipeOpts) { var ondrain = pipeOnDrain(src); dest.on('drain', ondrain); + var cleanedUp = false; function cleanup() { + debug('cleanup'); // cleanup event handlers once the pipe is broken dest.removeListener('close', onclose); dest.removeListener('finish', onfinish); @@ -33472,34 +32939,53 @@ Readable.prototype.pipe = function(dest, pipeOpts) { dest.removeListener('unpipe', onunpipe); src.removeListener('end', onend); src.removeListener('end', cleanup); + src.removeListener('data', ondata); + + cleanedUp = true; // if the reader is waiting for a drain event from this // specific writer, then it would cause it to never start // flowing again. // So, if this is awaiting a drain, then we just call it now. // If we don't know, then assume that we are waiting for one. - if (!dest._writableState || dest._writableState.needDrain) - ondrain(); + if (state.awaitDrain && (!dest._writableState || dest._writableState.needDrain)) ondrain(); + } + + // If the user pushes more data while we're writing to dest then we'll end up + // in ondata again. However, we only want to increase awaitDrain once because + // dest will only emit one 'drain' event for the multiple writes. + // => Introduce a guard on increasing awaitDrain. + var increasedAwaitDrain = false; + src.on('data', ondata); + function ondata(chunk) { + debug('ondata'); + increasedAwaitDrain = false; + var ret = dest.write(chunk); + if (false === ret && !increasedAwaitDrain) { + // If the user unpiped during `dest.write()`, it is possible + // to get stuck in a permanently paused state if that write + // also returned false. + // => Check whether `dest` is still a piping destination. + if ((state.pipesCount === 1 && state.pipes === dest || state.pipesCount > 1 && indexOf(state.pipes, dest) !== -1) && !cleanedUp) { + debug('false write response, pause', src._readableState.awaitDrain); + src._readableState.awaitDrain++; + increasedAwaitDrain = true; + } + src.pause(); + } } // if the dest has an error, then stop piping into it. // however, don't suppress the throwing behavior for this. function onerror(er) { + debug('onerror', er); unpipe(); dest.removeListener('error', onerror); - if (EE.listenerCount(dest, 'error') === 0) - dest.emit('error', er); + if (EElistenerCount(dest, 'error') === 0) dest.emit('error', er); } - // This is a brutally ugly hack to make sure that our error handler - // is attached before any userland ones. NEVER DO THIS. - if (!dest._events || !dest._events.error) - dest.on('error', onerror); - else if (isArray(dest._events.error)) - dest._events.error.unshift(onerror); - else - dest._events.error = [onerror, dest._events.error]; - + // Make sure our error handler is attached before userland ones. + prependListener(dest, 'error', onerror); // Both close and finish should trigger unpipe, but only once. function onclose() { @@ -33508,12 +32994,14 @@ Readable.prototype.pipe = function(dest, pipeOpts) { } dest.once('close', onclose); function onfinish() { + debug('onfinish'); dest.removeListener('close', onclose); unpipe(); } dest.once('finish', onfinish); function unpipe() { + debug('unpipe'); src.unpipe(dest); } @@ -33522,106 +33010,43 @@ Readable.prototype.pipe = function(dest, pipeOpts) { // start the flow if it hasn't been started already. if (!state.flowing) { - // the handler that waits for readable events after all - // the data gets sucked out in flow. - // This would be easier to follow with a .once() handler - // in flow(), but that is too slow. - this.on('readable', pipeOnReadable); - - state.flowing = true; - process.nextTick(function() { - flow(src); - }); + debug('pipe resume'); + src.resume(); } return dest; }; function pipeOnDrain(src) { - return function() { - var dest = this; + return function () { var state = src._readableState; - state.awaitDrain--; - if (state.awaitDrain === 0) + debug('pipeOnDrain', state.awaitDrain); + if (state.awaitDrain) state.awaitDrain--; + if (state.awaitDrain === 0 && EElistenerCount(src, 'data')) { + state.flowing = true; flow(src); + } }; } -function flow(src) { - var state = src._readableState; - var chunk; - state.awaitDrain = 0; - - function write(dest, i, list) { - var written = dest.write(chunk); - if (false === written) { - state.awaitDrain++; - } - } - - while (state.pipesCount && null !== (chunk = src.read())) { - - if (state.pipesCount === 1) - write(state.pipes, 0, null); - else - forEach(state.pipes, write); - - src.emit('data', chunk); - - // if anyone needs a drain, then we have to wait for that. - if (state.awaitDrain > 0) - return; - } - - // if every destination was unpiped, either before entering this - // function, or in the while loop, then stop flowing. - // - // NB: This is a pretty rare edge case. - if (state.pipesCount === 0) { - state.flowing = false; - - // if there were data event listeners added, then switch to old mode. - if (EE.listenerCount(src, 'data') > 0) - emitDataEvents(src); - return; - } - - // at this point, no one needed a drain, so we just ran out of data - // on the next readable event, start it over again. - state.ranOut = true; -} - -function pipeOnReadable() { - if (this._readableState.ranOut) { - this._readableState.ranOut = false; - flow(this); - } -} - - -Readable.prototype.unpipe = function(dest) { +Readable.prototype.unpipe = function (dest) { var state = this._readableState; // if we're not piping anywhere, then do nothing. - if (state.pipesCount === 0) - return this; + if (state.pipesCount === 0) return this; // just one destination. most common case. if (state.pipesCount === 1) { // passed in one, but it's not the right one. - if (dest && dest !== state.pipes) - return this; + if (dest && dest !== state.pipes) return this; - if (!dest) - dest = state.pipes; + if (!dest) dest = state.pipes; // got a match. state.pipes = null; state.pipesCount = 0; - this.removeListener('readable', pipeOnReadable); state.flowing = false; - if (dest) - dest.emit('unpipe', this); + if (dest) dest.emit('unpipe', this); return this; } @@ -33633,23 +33058,20 @@ Readable.prototype.unpipe = function(dest) { var len = state.pipesCount; state.pipes = null; state.pipesCount = 0; - this.removeListener('readable', pipeOnReadable); state.flowing = false; - for (var i = 0; i < len; i++) + for (var i = 0; i < len; i++) { dests[i].emit('unpipe', this); - return this; + }return this; } // try to find the right one. - var i = indexOf(state.pipes, dest); - if (i === -1) - return this; + var index = indexOf(state.pipes, dest); + if (index === -1) return this; - state.pipes.splice(i, 1); + state.pipes.splice(index, 1); state.pipesCount -= 1; - if (state.pipesCount === 1) - state.pipes = state.pipes[0]; + if (state.pipesCount === 1) state.pipes = state.pipes[0]; dest.emit('unpipe', this); @@ -33658,20 +33080,19 @@ Readable.prototype.unpipe = function(dest) { // set up data events if they are asked for // Ensure readable listeners eventually get something -Readable.prototype.on = function(ev, fn) { +Readable.prototype.on = function (ev, fn) { var res = Stream.prototype.on.call(this, ev, fn); - if (ev === 'data' && !this._readableState.flowing) - emitDataEvents(this); - - if (ev === 'readable' && this.readable) { + if (ev === 'data') { + // Start flowing on next tick if stream isn't explicitly paused + if (this._readableState.flowing !== false) this.resume(); + } else if (ev === 'readable') { var state = this._readableState; - if (!state.readableListening) { - state.readableListening = true; + if (!state.endEmitted && !state.readableListening) { + state.readableListening = state.needReadable = true; state.emittedReadable = false; - state.needReadable = true; if (!state.reading) { - this.read(0); + processNextTick(nReadingNextTick, this); } else if (state.length) { emitReadable(this, state); } @@ -33682,96 +33103,83 @@ Readable.prototype.on = function(ev, fn) { }; Readable.prototype.addListener = Readable.prototype.on; +function nReadingNextTick(self) { + debug('readable nexttick read 0'); + self.read(0); +} + // pause() and resume() are remnants of the legacy readable stream API // If the user uses them, then switch into old mode. -Readable.prototype.resume = function() { - emitDataEvents(this); - this.read(0); - this.emit('resume'); +Readable.prototype.resume = function () { + var state = this._readableState; + if (!state.flowing) { + debug('resume'); + state.flowing = true; + resume(this, state); + } + return this; }; -Readable.prototype.pause = function() { - emitDataEvents(this, true); - this.emit('pause'); -}; +function resume(stream, state) { + if (!state.resumeScheduled) { + state.resumeScheduled = true; + processNextTick(resume_, stream, state); + } +} -function emitDataEvents(stream, startPaused) { - var state = stream._readableState; - - if (state.flowing) { - // https://github.com/isaacs/readable-stream/issues/16 - throw new Error('Cannot switch to old mode now.'); +function resume_(stream, state) { + if (!state.reading) { + debug('resume read 0'); + stream.read(0); } - var paused = startPaused || false; - var readable = false; + state.resumeScheduled = false; + state.awaitDrain = 0; + stream.emit('resume'); + flow(stream); + if (state.flowing && !state.reading) stream.read(0); +} - // convert to an old-style stream. - stream.readable = true; - stream.pipe = Stream.prototype.pipe; - stream.on = stream.addListener = Stream.prototype.on; - - stream.on('readable', function() { - readable = true; - - var c; - while (!paused && (null !== (c = stream.read()))) - stream.emit('data', c); - - if (c === null) { - readable = false; - stream._readableState.needReadable = true; - } - }); - - stream.pause = function() { - paused = true; +Readable.prototype.pause = function () { + debug('call pause flowing=%j', this._readableState.flowing); + if (false !== this._readableState.flowing) { + debug('pause'); + this._readableState.flowing = false; this.emit('pause'); - }; + } + return this; +}; - stream.resume = function() { - paused = false; - if (readable) - process.nextTick(function() { - stream.emit('readable'); - }); - else - this.read(0); - this.emit('resume'); - }; - - // now make it start, just in case it hadn't already. - stream.emit('readable'); +function flow(stream) { + var state = stream._readableState; + debug('flow', state.flowing); + while (state.flowing && stream.read() !== null) {} } // wrap an old-style stream as the async data source. // This is *not* part of the readable stream interface. // It is an ugly unfortunate mess of history. -Readable.prototype.wrap = function(stream) { +Readable.prototype.wrap = function (stream) { var state = this._readableState; var paused = false; var self = this; - stream.on('end', function() { + stream.on('end', function () { + debug('wrapped end'); if (state.decoder && !state.ended) { var chunk = state.decoder.end(); - if (chunk && chunk.length) - self.push(chunk); + if (chunk && chunk.length) self.push(chunk); } self.push(null); }); - stream.on('data', function(chunk) { - if (state.decoder) - chunk = state.decoder.write(chunk); + stream.on('data', function (chunk) { + debug('wrapped data'); + if (state.decoder) chunk = state.decoder.write(chunk); // don't skip over falsy values in objectMode - //if (state.objectMode && util.isNullOrUndefined(chunk)) - if (state.objectMode && (chunk === null || chunk === undefined)) - return; - else if (!state.objectMode && (!chunk || !chunk.length)) - return; + if (state.objectMode && (chunk === null || chunk === undefined)) return;else if (!state.objectMode && (!chunk || !chunk.length)) return; var ret = self.push(chunk); if (!ret) { @@ -33783,23 +33191,24 @@ Readable.prototype.wrap = function(stream) { // proxy all the other methods. // important when wrapping filters and duplexes. for (var i in stream) { - if (typeof stream[i] === 'function' && - typeof this[i] === 'undefined') { - this[i] = function(method) { return function() { - return stream[method].apply(stream, arguments); - }}(i); + if (this[i] === undefined && typeof stream[i] === 'function') { + this[i] = function (method) { + return function () { + return stream[method].apply(stream, arguments); + }; + }(i); } } // proxy certain important events. - var events = ['error', 'close', 'destroy', 'pause', 'resume']; - forEach(events, function(ev) { - stream.on(ev, self.emit.bind(self, ev)); - }); + for (var n = 0; n < kProxyEvents.length; n++) { + stream.on(kProxyEvents[n], self.emit.bind(self, kProxyEvents[n])); + } // when we try to consume some more bytes, simply unpause the // underlying stream. - self._read = function(n) { + self._read = function (n) { + debug('wrapped _read', n); if (paused) { paused = false; stream.resume(); @@ -33809,135 +33218,145 @@ Readable.prototype.wrap = function(stream) { return self; }; - - // exposed for testing purposes only. Readable._fromList = fromList; // Pluck off n bytes from an array of buffers. // Length is the combined lengths of all the buffers in the list. +// This function is designed to be inlinable, so please take care when making +// changes to the function body. function fromList(n, state) { - var list = state.buffer; - var length = state.length; - var stringMode = !!state.decoder; - var objectMode = !!state.objectMode; + // nothing buffered + if (state.length === 0) return null; + var ret; - - // nothing in the list, definitely empty. - if (list.length === 0) - return null; - - if (length === 0) - ret = null; - else if (objectMode) - ret = list.shift(); - else if (!n || n >= length) { - // read it all, truncate the array. - if (stringMode) - ret = list.join(''); - else - ret = Buffer.concat(list, length); - list.length = 0; + if (state.objectMode) ret = state.buffer.shift();else if (!n || n >= state.length) { + // read it all, truncate the list + if (state.decoder) ret = state.buffer.join('');else if (state.buffer.length === 1) ret = state.buffer.head.data;else ret = state.buffer.concat(state.length); + state.buffer.clear(); } else { - // read just some of it. - if (n < list[0].length) { - // just take a part of the first list item. - // slice is the same for buffers and strings. - var buf = list[0]; - ret = buf.slice(0, n); - list[0] = buf.slice(n); - } else if (n === list[0].length) { - // first list is a perfect match - ret = list.shift(); - } else { - // complex case. - // we have enough to cover it, but it spans past the first buffer. - if (stringMode) - ret = ''; - else - ret = new Buffer(n); - - var c = 0; - for (var i = 0, l = list.length; i < l && c < n; i++) { - var buf = list[0]; - var cpy = Math.min(n - c, buf.length); - - if (stringMode) - ret += buf.slice(0, cpy); - else - buf.copy(ret, c, 0, cpy); - - if (cpy < buf.length) - list[0] = buf.slice(cpy); - else - list.shift(); - - c += cpy; - } - } + // read part of list + ret = fromListPartial(n, state.buffer, state.decoder); } return ret; } +// Extracts only enough buffered data to satisfy the amount requested. +// This function is designed to be inlinable, so please take care when making +// changes to the function body. +function fromListPartial(n, list, hasStrings) { + var ret; + if (n < list.head.data.length) { + // slice is the same for buffers and strings + ret = list.head.data.slice(0, n); + list.head.data = list.head.data.slice(n); + } else if (n === list.head.data.length) { + // first chunk is a perfect match + ret = list.shift(); + } else { + // result spans more than one buffer + ret = hasStrings ? copyFromBufferString(n, list) : copyFromBuffer(n, list); + } + return ret; +} + +// Copies a specified amount of characters from the list of buffered data +// chunks. +// This function is designed to be inlinable, so please take care when making +// changes to the function body. +function copyFromBufferString(n, list) { + var p = list.head; + var c = 1; + var ret = p.data; + n -= ret.length; + while (p = p.next) { + var str = p.data; + var nb = n > str.length ? str.length : n; + if (nb === str.length) ret += str;else ret += str.slice(0, n); + n -= nb; + if (n === 0) { + if (nb === str.length) { + ++c; + if (p.next) list.head = p.next;else list.head = list.tail = null; + } else { + list.head = p; + p.data = str.slice(nb); + } + break; + } + ++c; + } + list.length -= c; + return ret; +} + +// Copies a specified amount of bytes from the list of buffered data chunks. +// This function is designed to be inlinable, so please take care when making +// changes to the function body. +function copyFromBuffer(n, list) { + var ret = bufferShim.allocUnsafe(n); + var p = list.head; + var c = 1; + p.data.copy(ret); + n -= p.data.length; + while (p = p.next) { + var buf = p.data; + var nb = n > buf.length ? buf.length : n; + buf.copy(ret, ret.length - n, 0, nb); + n -= nb; + if (n === 0) { + if (nb === buf.length) { + ++c; + if (p.next) list.head = p.next;else list.head = list.tail = null; + } else { + list.head = p; + p.data = buf.slice(nb); + } + break; + } + ++c; + } + list.length -= c; + return ret; +} + function endReadable(stream) { var state = stream._readableState; // If we get here before consuming all the bytes, then that is a // bug in node. Should never happen. - if (state.length > 0) - throw new Error('endReadable called on non-empty stream'); + if (state.length > 0) throw new Error('"endReadable()" called on non-empty stream'); - if (!state.endEmitted && state.calledRead) { + if (!state.endEmitted) { state.ended = true; - process.nextTick(function() { - // Check that we didn't get one last unshift. - if (!state.endEmitted && state.length === 0) { - state.endEmitted = true; - stream.readable = false; - stream.emit('end'); - } - }); + processNextTick(endReadableNT, state, stream); } } -function forEach (xs, f) { +function endReadableNT(state, stream) { + // Check that we didn't get one last unshift. + if (!state.endEmitted && state.length === 0) { + state.endEmitted = true; + stream.readable = false; + stream.emit('end'); + } +} + +function forEach(xs, f) { for (var i = 0, l = xs.length; i < l; i++) { f(xs[i], i); } } -function indexOf (xs, x) { +function indexOf(xs, x) { for (var i = 0, l = xs.length; i < l; i++) { if (xs[i] === x) return i; } return -1; } - }).call(this,require('_process')) -},{"_process":94,"buffer":5,"core-util-is":7,"events":12,"inherits":47,"isarray":50,"stream":106,"string_decoder/":122}],98:[function(require,module,exports){ -// Copyright Joyent, Inc. and other Node contributors. -// -// Permission is hereby granted, free of charge, to any person obtaining a -// copy of this software and associated documentation files (the -// "Software"), to deal in the Software without restriction, including -// without limitation the rights to use, copy, modify, merge, publish, -// distribute, sublicense, and/or sell copies of the Software, and to permit -// persons to whom the Software is furnished to do so, subject to the -// following conditions: -// -// The above copyright notice and this permission notice shall be included -// in all copies or substantial portions of the Software. -// -// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS -// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF -// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN -// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, -// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR -// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE -// USE OR OTHER DEALINGS IN THE SOFTWARE. - - +},{"./_stream_duplex":96,"./internal/streams/BufferList":101,"./internal/streams/stream":102,"_process":94,"buffer":7,"buffer-shims":9,"core-util-is":19,"events":24,"inherits":47,"isarray":50,"process-nextick-args":93,"string_decoder/":112,"util":3}],99:[function(require,module,exports){ // a transform stream is a readable/writable stream where you do // something with the data. Sometimes it's called a "filter", // but that's not a great name for it, since that implies a thing where @@ -33980,6 +33399,8 @@ function indexOf (xs, x) { // would be consumed, and then the rest would wait (un-transformed) until // the results of the previous transformed chunk were consumed. +'use strict'; + module.exports = Transform; var Duplex = require('./_stream_duplex'); @@ -33991,9 +33412,8 @@ util.inherits = require('inherits'); util.inherits(Transform, Duplex); - -function TransformState(options, stream) { - this.afterTransform = function(er, data) { +function TransformState(stream) { + this.afterTransform = function (er, data) { return afterTransform(stream, er, data); }; @@ -34001,6 +33421,7 @@ function TransformState(options, stream) { this.transforming = false; this.writecb = null; this.writechunk = null; + this.writeencoding = null; } function afterTransform(stream, er, data) { @@ -34009,17 +33430,14 @@ function afterTransform(stream, er, data) { var cb = ts.writecb; - if (!cb) - return stream.emit('error', new Error('no writecb in Transform class')); + if (!cb) return stream.emit('error', new Error('no writecb in Transform class')); ts.writechunk = null; ts.writecb = null; - if (data !== null && data !== undefined) - stream.push(data); + if (data !== null && data !== undefined) stream.push(data); - if (cb) - cb(er); + cb(er); var rs = stream._readableState; rs.reading = false; @@ -34028,16 +33446,13 @@ function afterTransform(stream, er, data) { } } - function Transform(options) { - if (!(this instanceof Transform)) - return new Transform(options); + if (!(this instanceof Transform)) return new Transform(options); Duplex.call(this, options); - var ts = this._transformState = new TransformState(options, this); + this._transformState = new TransformState(this); - // when the writable side finishes, then flush out anything remaining. var stream = this; // start out asking for a readable event once data is transformed. @@ -34048,17 +33463,21 @@ function Transform(options) { // sync guard flag. this._readableState.sync = false; - this.once('finish', function() { - if ('function' === typeof this._flush) - this._flush(function(er) { - done(stream, er); - }); - else - done(stream); + if (options) { + if (typeof options.transform === 'function') this._transform = options.transform; + + if (typeof options.flush === 'function') this._flush = options.flush; + } + + // When the writable side finishes, then flush out anything remaining. + this.once('prefinish', function () { + if (typeof this._flush === 'function') this._flush(function (er, data) { + done(stream, er, data); + });else done(stream); }); } -Transform.prototype.push = function(chunk, encoding) { +Transform.prototype.push = function (chunk, encoding) { this._transformState.needTransform = false; return Duplex.prototype.push.call(this, chunk, encoding); }; @@ -34073,28 +33492,25 @@ Transform.prototype.push = function(chunk, encoding) { // Call `cb(err)` when you are done with this chunk. If you pass // an error, then that'll put the hurt on the whole operation. If you // never call cb(), then you'll never get another chunk. -Transform.prototype._transform = function(chunk, encoding, cb) { - throw new Error('not implemented'); +Transform.prototype._transform = function (chunk, encoding, cb) { + throw new Error('_transform() is not implemented'); }; -Transform.prototype._write = function(chunk, encoding, cb) { +Transform.prototype._write = function (chunk, encoding, cb) { var ts = this._transformState; ts.writecb = cb; ts.writechunk = chunk; ts.writeencoding = encoding; if (!ts.transforming) { var rs = this._readableState; - if (ts.needTransform || - rs.needReadable || - rs.length < rs.highWaterMark) - this._read(rs.highWaterMark); + if (ts.needTransform || rs.needReadable || rs.length < rs.highWaterMark) this._read(rs.highWaterMark); } }; // Doesn't matter what the args are here. // _transform does all the work. // That we got here means that the readable side wants more data. -Transform.prototype._read = function(n) { +Transform.prototype._read = function (n) { var ts = this._transformState; if (ts.writechunk !== null && ts.writecb && !ts.transforming) { @@ -34107,93 +33523,99 @@ Transform.prototype._read = function(n) { } }; +function done(stream, er, data) { + if (er) return stream.emit('error', er); -function done(stream, er) { - if (er) - return stream.emit('error', er); + if (data !== null && data !== undefined) stream.push(data); // if there's nothing in the write buffer, then that means // that nothing more will ever be provided var ws = stream._writableState; - var rs = stream._readableState; var ts = stream._transformState; - if (ws.length) - throw new Error('calling transform done when ws.length != 0'); + if (ws.length) throw new Error('Calling transform done when ws.length != 0'); - if (ts.transforming) - throw new Error('calling transform done when still transforming'); + if (ts.transforming) throw new Error('Calling transform done when still transforming'); return stream.push(null); } - -},{"./_stream_duplex":95,"core-util-is":7,"inherits":47}],99:[function(require,module,exports){ +},{"./_stream_duplex":96,"core-util-is":19,"inherits":47}],100:[function(require,module,exports){ (function (process){ -// Copyright Joyent, Inc. and other Node contributors. -// -// Permission is hereby granted, free of charge, to any person obtaining a -// copy of this software and associated documentation files (the -// "Software"), to deal in the Software without restriction, including -// without limitation the rights to use, copy, modify, merge, publish, -// distribute, sublicense, and/or sell copies of the Software, and to permit -// persons to whom the Software is furnished to do so, subject to the -// following conditions: -// -// The above copyright notice and this permission notice shall be included -// in all copies or substantial portions of the Software. -// -// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS -// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF -// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN -// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, -// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR -// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE -// USE OR OTHER DEALINGS IN THE SOFTWARE. - // A bit simpler than readable streams. -// Implement an async ._write(chunk, cb), and it'll handle all +// Implement an async ._write(chunk, encoding, cb), and it'll handle all // the drain event emission and buffering. +'use strict'; + module.exports = Writable; /**/ -var Buffer = require('buffer').Buffer; +var processNextTick = require('process-nextick-args'); +/**/ + +/**/ +var asyncWrite = !process.browser && ['v0.10', 'v0.9.'].indexOf(process.version.slice(0, 5)) > -1 ? setImmediate : processNextTick; +/**/ + +/**/ +var Duplex; /**/ Writable.WritableState = WritableState; - /**/ var util = require('core-util-is'); util.inherits = require('inherits'); /**/ -var Stream = require('stream'); +/**/ +var internalUtil = { + deprecate: require('util-deprecate') +}; +/**/ + +/**/ +var Stream = require('./internal/streams/stream'); +/**/ + +var Buffer = require('buffer').Buffer; +/**/ +var bufferShim = require('buffer-shims'); +/**/ util.inherits(Writable, Stream); +function nop() {} + function WriteReq(chunk, encoding, cb) { this.chunk = chunk; this.encoding = encoding; this.callback = cb; + this.next = null; } function WritableState(options, stream) { - options = options || {}; + Duplex = Duplex || require('./_stream_duplex'); - // the point at which write() starts returning false - // Note: 0 is a valid value, means that we always return false if - // the entire buffer is not flushed immediately on write() - var hwm = options.highWaterMark; - this.highWaterMark = (hwm || hwm === 0) ? hwm : 16 * 1024; + options = options || {}; // object stream flag to indicate whether or not this stream // contains buffers or objects. this.objectMode = !!options.objectMode; + if (stream instanceof Duplex) this.objectMode = this.objectMode || !!options.writableObjectMode; + + // the point at which write() starts returning false + // Note: 0 is a valid value, means that we always return false if + // the entire buffer is not flushed immediately on write() + var hwm = options.highWaterMark; + var defaultHwm = this.objectMode ? 16 : 16 * 1024; + this.highWaterMark = hwm || hwm === 0 ? hwm : defaultHwm; + // cast to ints. this.highWaterMark = ~~this.highWaterMark; + // drain event flag. this.needDrain = false; // at the start of calling end() this.ending = false; @@ -34221,8 +33643,11 @@ function WritableState(options, stream) { // a flag to see when we're in the middle of a write. this.writing = false; + // when true all writes will be buffered until .uncork() call + this.corked = 0; + // a flag to be able to tell if the onwrite cb is called immediately, - // or on a later tick. We set this to true at first, becuase any + // or on a later tick. We set this to true at first, because any // actions that shouldn't happen until "later" should generally also // not happen before the first write call. this.sync = true; @@ -34233,7 +33658,7 @@ function WritableState(options, stream) { this.bufferProcessing = false; // the callback that's passed to _write(chunk,cb) - this.onwrite = function(er) { + this.onwrite = function (er) { onwrite(stream, er); }; @@ -34243,95 +33668,175 @@ function WritableState(options, stream) { // the amount that is being written when _write is called. this.writelen = 0; - this.buffer = []; + this.bufferedRequest = null; + this.lastBufferedRequest = null; + + // number of pending user-supplied write callbacks + // this must be 0 before 'finish' can be emitted + this.pendingcb = 0; + + // emit prefinish if the only thing we're waiting for is _write cbs + // This is relevant for synchronous Transform streams + this.prefinished = false; // True if the error was already emitted and should not be thrown again this.errorEmitted = false; + + // count buffered requests + this.bufferedRequestCount = 0; + + // allocate the first CorkedRequest, there is always + // one allocated and free to use, and we maintain at most two + this.corkedRequestsFree = new CorkedRequest(this); +} + +WritableState.prototype.getBuffer = function getBuffer() { + var current = this.bufferedRequest; + var out = []; + while (current) { + out.push(current); + current = current.next; + } + return out; +}; + +(function () { + try { + Object.defineProperty(WritableState.prototype, 'buffer', { + get: internalUtil.deprecate(function () { + return this.getBuffer(); + }, '_writableState.buffer is deprecated. Use _writableState.getBuffer ' + 'instead.') + }); + } catch (_) {} +})(); + +// Test _writableState for inheritance to account for Duplex streams, +// whose prototype chain only points to Readable. +var realHasInstance; +if (typeof Symbol === 'function' && Symbol.hasInstance && typeof Function.prototype[Symbol.hasInstance] === 'function') { + realHasInstance = Function.prototype[Symbol.hasInstance]; + Object.defineProperty(Writable, Symbol.hasInstance, { + value: function (object) { + if (realHasInstance.call(this, object)) return true; + + return object && object._writableState instanceof WritableState; + } + }); +} else { + realHasInstance = function (object) { + return object instanceof this; + }; } function Writable(options) { - var Duplex = require('./_stream_duplex'); + Duplex = Duplex || require('./_stream_duplex'); - // Writable ctor is applied to Duplexes, though they're not - // instanceof Writable, they're instanceof Readable. - if (!(this instanceof Writable) && !(this instanceof Duplex)) + // Writable ctor is applied to Duplexes, too. + // `realHasInstance` is necessary because using plain `instanceof` + // would return false, as no `_writableState` property is attached. + + // Trying to use the custom `instanceof` for Writable here will also break the + // Node.js LazyTransform implementation, which has a non-trivial getter for + // `_writableState` that would lead to infinite recursion. + if (!realHasInstance.call(Writable, this) && !(this instanceof Duplex)) { return new Writable(options); + } this._writableState = new WritableState(options, this); // legacy. this.writable = true; + if (options) { + if (typeof options.write === 'function') this._write = options.write; + + if (typeof options.writev === 'function') this._writev = options.writev; + } + Stream.call(this); } // Otherwise people can pipe Writable streams, which is just wrong. -Writable.prototype.pipe = function() { - this.emit('error', new Error('Cannot pipe. Not readable.')); +Writable.prototype.pipe = function () { + this.emit('error', new Error('Cannot pipe, not readable')); }; - -function writeAfterEnd(stream, state, cb) { +function writeAfterEnd(stream, cb) { var er = new Error('write after end'); // TODO: defer error events consistently everywhere, not just the cb stream.emit('error', er); - process.nextTick(function() { - cb(er); - }); + processNextTick(cb, er); } -// If we get something that is not a buffer, string, null, or undefined, -// and we're not in objectMode, then that's an error. -// Otherwise stream chunks are all considered to be of length=1, and the -// watermarks determine how many objects to keep in the buffer, rather than -// how many bytes or characters. +// Checks that a user-supplied chunk is valid, especially for the particular +// mode the stream is in. Currently this means that `null` is never accepted +// and undefined/non-string values are only allowed in object mode. function validChunk(stream, state, chunk, cb) { var valid = true; - if (!Buffer.isBuffer(chunk) && - 'string' !== typeof chunk && - chunk !== null && - chunk !== undefined && - !state.objectMode) { - var er = new TypeError('Invalid non-string/buffer chunk'); + var er = false; + + if (chunk === null) { + er = new TypeError('May not write null values to stream'); + } else if (typeof chunk !== 'string' && chunk !== undefined && !state.objectMode) { + er = new TypeError('Invalid non-string/buffer chunk'); + } + if (er) { stream.emit('error', er); - process.nextTick(function() { - cb(er); - }); + processNextTick(cb, er); valid = false; } return valid; } -Writable.prototype.write = function(chunk, encoding, cb) { +Writable.prototype.write = function (chunk, encoding, cb) { var state = this._writableState; var ret = false; + var isBuf = Buffer.isBuffer(chunk); if (typeof encoding === 'function') { cb = encoding; encoding = null; } - if (Buffer.isBuffer(chunk)) - encoding = 'buffer'; - else if (!encoding) - encoding = state.defaultEncoding; + if (isBuf) encoding = 'buffer';else if (!encoding) encoding = state.defaultEncoding; - if (typeof cb !== 'function') - cb = function() {}; + if (typeof cb !== 'function') cb = nop; - if (state.ended) - writeAfterEnd(this, state, cb); - else if (validChunk(this, state, chunk, cb)) - ret = writeOrBuffer(this, state, chunk, encoding, cb); + if (state.ended) writeAfterEnd(this, cb);else if (isBuf || validChunk(this, state, chunk, cb)) { + state.pendingcb++; + ret = writeOrBuffer(this, state, isBuf, chunk, encoding, cb); + } return ret; }; +Writable.prototype.cork = function () { + var state = this._writableState; + + state.corked++; +}; + +Writable.prototype.uncork = function () { + var state = this._writableState; + + if (state.corked) { + state.corked--; + + if (!state.writing && !state.corked && !state.finished && !state.bufferProcessing && state.bufferedRequest) clearBuffer(this, state); + } +}; + +Writable.prototype.setDefaultEncoding = function setDefaultEncoding(encoding) { + // node::ParseEncoding() requires lower case. + if (typeof encoding === 'string') encoding = encoding.toLowerCase(); + if (!(['hex', 'utf8', 'utf-8', 'ascii', 'binary', 'base64', 'ucs2', 'ucs-2', 'utf16le', 'utf-16le', 'raw'].indexOf((encoding + '').toLowerCase()) > -1)) throw new TypeError('Unknown encoding: ' + encoding); + this._writableState.defaultEncoding = encoding; + return this; +}; + function decodeChunk(state, chunk, encoding) { - if (!state.objectMode && - state.decodeStrings !== false && - typeof chunk === 'string') { - chunk = new Buffer(chunk, encoding); + if (!state.objectMode && state.decodeStrings !== false && typeof chunk === 'string') { + chunk = bufferShim.from(chunk, encoding); } return chunk; } @@ -34339,43 +33844,47 @@ function decodeChunk(state, chunk, encoding) { // if we're already writing something, then just put this // in the queue, and wait our turn. Otherwise, call _write // If we return false, then we need a drain event, so set that flag. -function writeOrBuffer(stream, state, chunk, encoding, cb) { - chunk = decodeChunk(state, chunk, encoding); - if (Buffer.isBuffer(chunk)) - encoding = 'buffer'; +function writeOrBuffer(stream, state, isBuf, chunk, encoding, cb) { + if (!isBuf) { + chunk = decodeChunk(state, chunk, encoding); + if (Buffer.isBuffer(chunk)) encoding = 'buffer'; + } var len = state.objectMode ? 1 : chunk.length; state.length += len; var ret = state.length < state.highWaterMark; // we must ensure that previous needDrain will not be reset to false. - if (!ret) - state.needDrain = true; + if (!ret) state.needDrain = true; - if (state.writing) - state.buffer.push(new WriteReq(chunk, encoding, cb)); - else - doWrite(stream, state, len, chunk, encoding, cb); + if (state.writing || state.corked) { + var last = state.lastBufferedRequest; + state.lastBufferedRequest = new WriteReq(chunk, encoding, cb); + if (last) { + last.next = state.lastBufferedRequest; + } else { + state.bufferedRequest = state.lastBufferedRequest; + } + state.bufferedRequestCount += 1; + } else { + doWrite(stream, state, false, len, chunk, encoding, cb); + } return ret; } -function doWrite(stream, state, len, chunk, encoding, cb) { +function doWrite(stream, state, writev, len, chunk, encoding, cb) { state.writelen = len; state.writecb = cb; state.writing = true; state.sync = true; - stream._write(chunk, encoding, state.onwrite); + if (writev) stream._writev(chunk, state.onwrite);else stream._write(chunk, encoding, state.onwrite); state.sync = false; } function onwriteError(stream, state, sync, er, cb) { - if (sync) - process.nextTick(function() { - cb(er); - }); - else - cb(er); + --state.pendingcb; + if (sync) processNextTick(cb, er);else cb(er); stream._writableState.errorEmitted = true; stream.emit('error', er); @@ -34395,19 +33904,18 @@ function onwrite(stream, er) { onwriteStateUpdate(state); - if (er) - onwriteError(stream, state, sync, er, cb); - else { + if (er) onwriteError(stream, state, sync, er, cb);else { // Check if we're actually ready to finish, but don't emit yet - var finished = needFinish(stream, state); + var finished = needFinish(state); - if (!finished && !state.bufferProcessing && state.buffer.length) + if (!finished && !state.corked && !state.bufferProcessing && state.bufferedRequest) { clearBuffer(stream, state); + } if (sync) { - process.nextTick(function() { - afterWrite(stream, state, finished, cb); - }); + /**/ + asyncWrite(afterWrite, stream, state, finished, cb); + /**/ } else { afterWrite(stream, state, finished, cb); } @@ -34415,11 +33923,10 @@ function onwrite(stream, er) { } function afterWrite(stream, state, finished, cb) { - if (!finished) - onwriteDrain(stream, state); + if (!finished) onwriteDrain(stream, state); + state.pendingcb--; cb(); - if (finished) - finishMaybe(stream, state); + finishMaybe(stream, state); } // Must force callback to be called on nextTick, so that we don't @@ -34432,42 +33939,71 @@ function onwriteDrain(stream, state) { } } - // if there's something in the buffer waiting, then process it function clearBuffer(stream, state) { state.bufferProcessing = true; + var entry = state.bufferedRequest; - for (var c = 0; c < state.buffer.length; c++) { - var entry = state.buffer[c]; - var chunk = entry.chunk; - var encoding = entry.encoding; - var cb = entry.callback; - var len = state.objectMode ? 1 : chunk.length; + if (stream._writev && entry && entry.next) { + // Fast case, write everything using _writev() + var l = state.bufferedRequestCount; + var buffer = new Array(l); + var holder = state.corkedRequestsFree; + holder.entry = entry; - doWrite(stream, state, len, chunk, encoding, cb); - - // if we didn't call the onwrite immediately, then - // it means that we need to wait until it does. - // also, that means that the chunk and cb are currently - // being processed, so move the buffer counter past them. - if (state.writing) { - c++; - break; + var count = 0; + while (entry) { + buffer[count] = entry; + entry = entry.next; + count += 1; } + + doWrite(stream, state, true, state.length, buffer, '', holder.finish); + + // doWrite is almost always async, defer these to save a bit of time + // as the hot path ends with doWrite + state.pendingcb++; + state.lastBufferedRequest = null; + if (holder.next) { + state.corkedRequestsFree = holder.next; + holder.next = null; + } else { + state.corkedRequestsFree = new CorkedRequest(state); + } + } else { + // Slow case, write chunks one-by-one + while (entry) { + var chunk = entry.chunk; + var encoding = entry.encoding; + var cb = entry.callback; + var len = state.objectMode ? 1 : chunk.length; + + doWrite(stream, state, false, len, chunk, encoding, cb); + entry = entry.next; + // if we didn't call the onwrite immediately, then + // it means that we need to wait until it does. + // also, that means that the chunk and cb are currently + // being processed, so move the buffer counter past them. + if (state.writing) { + break; + } + } + + if (entry === null) state.lastBufferedRequest = null; } + state.bufferedRequestCount = 0; + state.bufferedRequest = entry; state.bufferProcessing = false; - if (c < state.buffer.length) - state.buffer = state.buffer.slice(c); - else - state.buffer.length = 0; } -Writable.prototype._write = function(chunk, encoding, cb) { - cb(new Error('not implemented')); +Writable.prototype._write = function (chunk, encoding, cb) { + cb(new Error('_write() is not implemented')); }; -Writable.prototype.end = function(chunk, encoding, cb) { +Writable.prototype._writev = null; + +Writable.prototype.end = function (chunk, encoding, cb) { var state = this._writableState; if (typeof chunk === 'function') { @@ -34479,27 +34015,39 @@ Writable.prototype.end = function(chunk, encoding, cb) { encoding = null; } - if (typeof chunk !== 'undefined' && chunk !== null) - this.write(chunk, encoding); + if (chunk !== null && chunk !== undefined) this.write(chunk, encoding); + + // .end() fully uncorks + if (state.corked) { + state.corked = 1; + this.uncork(); + } // ignore unnecessary end() calls. - if (!state.ending && !state.finished) - endWritable(this, state, cb); + if (!state.ending && !state.finished) endWritable(this, state, cb); }; +function needFinish(state) { + return state.ending && state.length === 0 && state.bufferedRequest === null && !state.finished && !state.writing; +} -function needFinish(stream, state) { - return (state.ending && - state.length === 0 && - !state.finished && - !state.writing); +function prefinish(stream, state) { + if (!state.prefinished) { + state.prefinished = true; + stream.emit('prefinish'); + } } function finishMaybe(stream, state) { - var need = needFinish(stream, state); + var need = needFinish(state); if (need) { - state.finished = true; - stream.emit('finish'); + if (state.pendingcb === 0) { + prefinish(stream, state); + state.finished = true; + stream.emit('finish'); + } else { + prefinish(stream, state); + } } return need; } @@ -34508,95 +34056,123 @@ function endWritable(stream, state, cb) { state.ending = true; finishMaybe(stream, state); if (cb) { - if (state.finished) - process.nextTick(cb); - else - stream.once('finish', cb); + if (state.finished) processNextTick(cb);else stream.once('finish', cb); } state.ended = true; + stream.writable = false; } +// It seems a linked list but it is not +// there will be only 2 of these for each stream +function CorkedRequest(state) { + var _this = this; + + this.next = null; + this.entry = null; + this.finish = function (err) { + var entry = _this.entry; + _this.entry = null; + while (entry) { + var cb = entry.callback; + state.pendingcb--; + cb(err); + entry = entry.next; + } + if (state.corkedRequestsFree) { + state.corkedRequestsFree.next = _this; + } else { + state.corkedRequestsFree = _this; + } + }; +} }).call(this,require('_process')) -},{"./_stream_duplex":95,"_process":94,"buffer":5,"core-util-is":7,"inherits":47,"stream":106}],100:[function(require,module,exports){ -(function (process){ -var Stream = require('stream'); // hack to fix a circular dependency issue when used with browserify +},{"./_stream_duplex":96,"./internal/streams/stream":102,"_process":94,"buffer":7,"buffer-shims":9,"core-util-is":19,"inherits":47,"process-nextick-args":93,"util-deprecate":116}],101:[function(require,module,exports){ +'use strict'; + +var Buffer = require('buffer').Buffer; +/**/ +var bufferShim = require('buffer-shims'); +/**/ + +module.exports = BufferList; + +function BufferList() { + this.head = null; + this.tail = null; + this.length = 0; +} + +BufferList.prototype.push = function (v) { + var entry = { data: v, next: null }; + if (this.length > 0) this.tail.next = entry;else this.head = entry; + this.tail = entry; + ++this.length; +}; + +BufferList.prototype.unshift = function (v) { + var entry = { data: v, next: this.head }; + if (this.length === 0) this.tail = entry; + this.head = entry; + ++this.length; +}; + +BufferList.prototype.shift = function () { + if (this.length === 0) return; + var ret = this.head.data; + if (this.length === 1) this.head = this.tail = null;else this.head = this.head.next; + --this.length; + return ret; +}; + +BufferList.prototype.clear = function () { + this.head = this.tail = null; + this.length = 0; +}; + +BufferList.prototype.join = function (s) { + if (this.length === 0) return ''; + var p = this.head; + var ret = '' + p.data; + while (p = p.next) { + ret += s + p.data; + }return ret; +}; + +BufferList.prototype.concat = function (n) { + if (this.length === 0) return bufferShim.alloc(0); + if (this.length === 1) return this.head.data; + var ret = bufferShim.allocUnsafe(n >>> 0); + var p = this.head; + var i = 0; + while (p) { + p.data.copy(ret, i); + i += p.data.length; + p = p.next; + } + return ret; +}; +},{"buffer":7,"buffer-shims":9}],102:[function(require,module,exports){ +module.exports = require('events').EventEmitter; + +},{"events":24}],103:[function(require,module,exports){ +module.exports = require('./readable').PassThrough + +},{"./readable":104}],104:[function(require,module,exports){ exports = module.exports = require('./lib/_stream_readable.js'); -exports.Stream = Stream; +exports.Stream = exports; exports.Readable = exports; exports.Writable = require('./lib/_stream_writable.js'); exports.Duplex = require('./lib/_stream_duplex.js'); exports.Transform = require('./lib/_stream_transform.js'); exports.PassThrough = require('./lib/_stream_passthrough.js'); -if (!process.browser && process.env.READABLE_STREAM === 'disable') { - module.exports = require('stream'); -} -}).call(this,require('_process')) -},{"./lib/_stream_duplex.js":95,"./lib/_stream_passthrough.js":96,"./lib/_stream_readable.js":97,"./lib/_stream_transform.js":98,"./lib/_stream_writable.js":99,"_process":94,"stream":106}],101:[function(require,module,exports){ -/* eslint-disable node/no-deprecated-api */ -var buffer = require('buffer') -var Buffer = buffer.Buffer +},{"./lib/_stream_duplex.js":96,"./lib/_stream_passthrough.js":97,"./lib/_stream_readable.js":98,"./lib/_stream_transform.js":99,"./lib/_stream_writable.js":100}],105:[function(require,module,exports){ +module.exports = require('./readable').Transform -// alternative to using Object.keys for old browsers -function copyProps (src, dst) { - for (var key in src) { - dst[key] = src[key] - } -} -if (Buffer.from && Buffer.alloc && Buffer.allocUnsafe && Buffer.allocUnsafeSlow) { - module.exports = buffer -} else { - // Copy properties from require('buffer') - copyProps(buffer, exports) - exports.Buffer = SafeBuffer -} +},{"./readable":104}],106:[function(require,module,exports){ +module.exports = require('./lib/_stream_writable.js'); -function SafeBuffer (arg, encodingOrOffset, length) { - return Buffer(arg, encodingOrOffset, length) -} - -// Copy static methods from Buffer -copyProps(Buffer, SafeBuffer) - -SafeBuffer.from = function (arg, encodingOrOffset, length) { - if (typeof arg === 'number') { - throw new TypeError('Argument must not be a number') - } - return Buffer(arg, encodingOrOffset, length) -} - -SafeBuffer.alloc = function (size, fill, encoding) { - if (typeof size !== 'number') { - throw new TypeError('Argument must be a number') - } - var buf = Buffer(size) - if (fill !== undefined) { - if (typeof encoding === 'string') { - buf.fill(fill, encoding) - } else { - buf.fill(fill) - } - } else { - buf.fill(0) - } - return buf -} - -SafeBuffer.allocUnsafe = function (size) { - if (typeof size !== 'number') { - throw new TypeError('Argument must be a number') - } - return Buffer(size) -} - -SafeBuffer.allocUnsafeSlow = function (size) { - if (typeof size !== 'number') { - throw new TypeError('Argument must be a number') - } - return buffer.SlowBuffer(size) -} - -},{"buffer":5}],102:[function(require,module,exports){ +},{"./lib/_stream_writable.js":100}],107:[function(require,module,exports){ var encode = require('./lib/encoder'), decode = require('./lib/decoder'); @@ -34605,7 +34181,7 @@ module.exports = { decode: decode }; -},{"./lib/decoder":103,"./lib/encoder":104}],103:[function(require,module,exports){ +},{"./lib/decoder":108,"./lib/encoder":109}],108:[function(require,module,exports){ (function (Buffer){ /* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- / /* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */ @@ -35588,7 +35164,7 @@ function decode(jpegData) { } }).call(this,require("buffer").Buffer) -},{"buffer":5}],104:[function(require,module,exports){ +},{"buffer":7}],109:[function(require,module,exports){ (function (Buffer){ /* Copyright (c) 2008, Adobe Systems Incorporated @@ -36358,7 +35934,7 @@ function getImageDataFromImage(idOrElement){ } }).call(this,require("buffer").Buffer) -},{"buffer":5}],105:[function(require,module,exports){ +},{"buffer":7}],110:[function(require,module,exports){ (function (Buffer){ 'use strict' @@ -36503,7 +36079,7 @@ module.exports = function savePixels (array, type, options) { } }).call(this,require("buffer").Buffer) -},{"buffer":5,"contentstream":6,"gif-encoder":23,"jpeg-js":102,"ndarray":58,"ndarray-ops":55,"pngjs-nozlib":91,"through":123}],106:[function(require,module,exports){ +},{"buffer":7,"contentstream":10,"gif-encoder":35,"jpeg-js":107,"ndarray":58,"ndarray-ops":55,"pngjs-nozlib":91,"through":113}],111:[function(require,module,exports){ // Copyright Joyent, Inc. and other Node contributors. // // Permission is hereby granted, free of charge, to any person obtaining a @@ -36632,263 +36208,281 @@ Stream.prototype.pipe = function(dest, options) { return dest; }; -},{"events":12,"inherits":47,"readable-stream/duplex.js":108,"readable-stream/passthrough.js":117,"readable-stream/readable.js":118,"readable-stream/transform.js":119,"readable-stream/writable.js":120}],107:[function(require,module,exports){ -arguments[4][34][0].apply(exports,arguments) -},{"dup":34}],108:[function(require,module,exports){ -module.exports = require('./lib/_stream_duplex.js'); - -},{"./lib/_stream_duplex.js":109}],109:[function(require,module,exports){ -arguments[4][35][0].apply(exports,arguments) -},{"./_stream_readable":111,"./_stream_writable":113,"core-util-is":7,"dup":35,"inherits":47,"process-nextick-args":93}],110:[function(require,module,exports){ -arguments[4][36][0].apply(exports,arguments) -},{"./_stream_transform":112,"core-util-is":7,"dup":36,"inherits":47}],111:[function(require,module,exports){ -arguments[4][37][0].apply(exports,arguments) -},{"./_stream_duplex":109,"./internal/streams/BufferList":114,"./internal/streams/destroy":115,"./internal/streams/stream":116,"_process":94,"core-util-is":7,"dup":37,"events":12,"inherits":47,"isarray":107,"process-nextick-args":93,"safe-buffer":101,"string_decoder/":121,"util":2}],112:[function(require,module,exports){ -arguments[4][38][0].apply(exports,arguments) -},{"./_stream_duplex":109,"core-util-is":7,"dup":38,"inherits":47}],113:[function(require,module,exports){ -arguments[4][39][0].apply(exports,arguments) -},{"./_stream_duplex":109,"./internal/streams/destroy":115,"./internal/streams/stream":116,"_process":94,"core-util-is":7,"dup":39,"inherits":47,"process-nextick-args":93,"safe-buffer":101,"util-deprecate":126}],114:[function(require,module,exports){ -arguments[4][40][0].apply(exports,arguments) -},{"dup":40,"safe-buffer":101}],115:[function(require,module,exports){ -arguments[4][41][0].apply(exports,arguments) -},{"dup":41,"process-nextick-args":93}],116:[function(require,module,exports){ -arguments[4][42][0].apply(exports,arguments) -},{"dup":42,"events":12}],117:[function(require,module,exports){ -module.exports = require('./readable').PassThrough - -},{"./readable":118}],118:[function(require,module,exports){ -arguments[4][43][0].apply(exports,arguments) -},{"./lib/_stream_duplex.js":109,"./lib/_stream_passthrough.js":110,"./lib/_stream_readable.js":111,"./lib/_stream_transform.js":112,"./lib/_stream_writable.js":113,"dup":43}],119:[function(require,module,exports){ -arguments[4][44][0].apply(exports,arguments) -},{"./readable":118,"dup":44}],120:[function(require,module,exports){ -module.exports = require('./lib/_stream_writable.js'); - -},{"./lib/_stream_writable.js":113}],121:[function(require,module,exports){ -arguments[4][45][0].apply(exports,arguments) -},{"dup":45,"safe-buffer":101}],122:[function(require,module,exports){ -// Copyright Joyent, Inc. and other Node contributors. -// -// Permission is hereby granted, free of charge, to any person obtaining a -// copy of this software and associated documentation files (the -// "Software"), to deal in the Software without restriction, including -// without limitation the rights to use, copy, modify, merge, publish, -// distribute, sublicense, and/or sell copies of the Software, and to permit -// persons to whom the Software is furnished to do so, subject to the -// following conditions: -// -// The above copyright notice and this permission notice shall be included -// in all copies or substantial portions of the Software. -// -// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS -// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF -// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN -// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, -// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR -// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE -// USE OR OTHER DEALINGS IN THE SOFTWARE. +},{"events":24,"inherits":47,"readable-stream/duplex.js":95,"readable-stream/passthrough.js":103,"readable-stream/readable.js":104,"readable-stream/transform.js":105,"readable-stream/writable.js":106}],112:[function(require,module,exports){ +'use strict'; var Buffer = require('buffer').Buffer; +var bufferShim = require('buffer-shims'); -var isBufferEncoding = Buffer.isEncoding - || function(encoding) { - switch (encoding && encoding.toLowerCase()) { - case 'hex': case 'utf8': case 'utf-8': case 'ascii': case 'binary': case 'base64': case 'ucs2': case 'ucs-2': case 'utf16le': case 'utf-16le': case 'raw': return true; - default: return false; - } - } - - -function assertEncoding(encoding) { - if (encoding && !isBufferEncoding(encoding)) { - throw new Error('Unknown encoding: ' + encoding); +var isEncoding = Buffer.isEncoding || function (encoding) { + encoding = '' + encoding; + switch (encoding && encoding.toLowerCase()) { + case 'hex':case 'utf8':case 'utf-8':case 'ascii':case 'binary':case 'base64':case 'ucs2':case 'ucs-2':case 'utf16le':case 'utf-16le':case 'raw': + return true; + default: + return false; } +}; + +function _normalizeEncoding(enc) { + if (!enc) return 'utf8'; + var retried; + while (true) { + switch (enc) { + case 'utf8': + case 'utf-8': + return 'utf8'; + case 'ucs2': + case 'ucs-2': + case 'utf16le': + case 'utf-16le': + return 'utf16le'; + case 'latin1': + case 'binary': + return 'latin1'; + case 'base64': + case 'ascii': + case 'hex': + return enc; + default: + if (retried) return; // undefined + enc = ('' + enc).toLowerCase(); + retried = true; + } + } +}; + +// Do not cache `Buffer.isEncoding` when checking encoding names as some +// modules monkey-patch it to support additional encodings +function normalizeEncoding(enc) { + var nenc = _normalizeEncoding(enc); + if (typeof nenc !== 'string' && (Buffer.isEncoding === isEncoding || !isEncoding(enc))) throw new Error('Unknown encoding: ' + enc); + return nenc || enc; } // StringDecoder provides an interface for efficiently splitting a series of // buffers into a series of JS strings without breaking apart multi-byte -// characters. CESU-8 is handled as part of the UTF-8 encoding. -// -// @TODO Handling all encodings inside a single object makes it very difficult -// to reason about this code, so it should be split up in the future. -// @TODO There should be a utf8-strict encoding that rejects invalid UTF-8 code -// points as used by CESU-8. -var StringDecoder = exports.StringDecoder = function(encoding) { - this.encoding = (encoding || 'utf8').toLowerCase().replace(/[-_]/, ''); - assertEncoding(encoding); +// characters. +exports.StringDecoder = StringDecoder; +function StringDecoder(encoding) { + this.encoding = normalizeEncoding(encoding); + var nb; switch (this.encoding) { - case 'utf8': - // CESU-8 represents each of Surrogate Pair by 3-bytes - this.surrogateSize = 3; - break; - case 'ucs2': case 'utf16le': - // UTF-16 represents each of Surrogate Pair by 2-bytes - this.surrogateSize = 2; - this.detectIncompleteChar = utf16DetectIncompleteChar; + this.text = utf16Text; + this.end = utf16End; + nb = 4; + break; + case 'utf8': + this.fillLast = utf8FillLast; + nb = 4; break; case 'base64': - // Base-64 stores 3 bytes in 4 chars, and pads the remainder. - this.surrogateSize = 3; - this.detectIncompleteChar = base64DetectIncompleteChar; + this.text = base64Text; + this.end = base64End; + nb = 3; break; default: - this.write = passThroughWrite; + this.write = simpleWrite; + this.end = simpleEnd; return; } - - // Enough space to store all bytes of a single character. UTF-8 needs 4 - // bytes, but CESU-8 may require up to 6 (3 bytes per surrogate). - this.charBuffer = new Buffer(6); - // Number of bytes received for the current incomplete multi-byte character. - this.charReceived = 0; - // Number of bytes expected for the current incomplete multi-byte character. - this.charLength = 0; -}; - - -// write decodes the given buffer and returns it as JS string that is -// guaranteed to not contain any partial multi-byte characters. Any partial -// character found at the end of the buffer is buffered up, and will be -// returned when calling write again with the remaining bytes. -// -// Note: Converting a Buffer containing an orphan surrogate to a String -// currently works, but converting a String to a Buffer (via `new Buffer`, or -// Buffer#write) will replace incomplete surrogates with the unicode -// replacement character. See https://codereview.chromium.org/121173009/ . -StringDecoder.prototype.write = function(buffer) { - var charStr = ''; - // if our last write ended with an incomplete multibyte character - while (this.charLength) { - // determine how many remaining bytes this buffer has to offer for this char - var available = (buffer.length >= this.charLength - this.charReceived) ? - this.charLength - this.charReceived : - buffer.length; - - // add the new bytes to the char buffer - buffer.copy(this.charBuffer, this.charReceived, 0, available); - this.charReceived += available; - - if (this.charReceived < this.charLength) { - // still not enough chars in this buffer? wait for more ... - return ''; - } - - // remove bytes belonging to the current character from the buffer - buffer = buffer.slice(available, buffer.length); - - // get the character that was split - charStr = this.charBuffer.slice(0, this.charLength).toString(this.encoding); - - // CESU-8: lead surrogate (D800-DBFF) is also the incomplete character - var charCode = charStr.charCodeAt(charStr.length - 1); - if (charCode >= 0xD800 && charCode <= 0xDBFF) { - this.charLength += this.surrogateSize; - charStr = ''; - continue; - } - this.charReceived = this.charLength = 0; - - // if there are no more bytes in this buffer, just emit our char - if (buffer.length === 0) { - return charStr; - } - break; - } - - // determine and set charLength / charReceived - this.detectIncompleteChar(buffer); - - var end = buffer.length; - if (this.charLength) { - // buffer the incomplete character bytes we got - buffer.copy(this.charBuffer, 0, buffer.length - this.charReceived, end); - end -= this.charReceived; - } - - charStr += buffer.toString(this.encoding, 0, end); - - var end = charStr.length - 1; - var charCode = charStr.charCodeAt(end); - // CESU-8: lead surrogate (D800-DBFF) is also the incomplete character - if (charCode >= 0xD800 && charCode <= 0xDBFF) { - var size = this.surrogateSize; - this.charLength += size; - this.charReceived += size; - this.charBuffer.copy(this.charBuffer, size, 0, size); - buffer.copy(this.charBuffer, 0, 0, size); - return charStr.substring(0, end); - } - - // or just emit the charStr - return charStr; -}; - -// detectIncompleteChar determines if there is an incomplete UTF-8 character at -// the end of the given buffer. If so, it sets this.charLength to the byte -// length that character, and sets this.charReceived to the number of bytes -// that are available for this character. -StringDecoder.prototype.detectIncompleteChar = function(buffer) { - // determine how many bytes we have to check at the end of this buffer - var i = (buffer.length >= 3) ? 3 : buffer.length; - - // Figure out if one of the last i bytes of our buffer announces an - // incomplete char. - for (; i > 0; i--) { - var c = buffer[buffer.length - i]; - - // See http://en.wikipedia.org/wiki/UTF-8#Description - - // 110XXXXX - if (i == 1 && c >> 5 == 0x06) { - this.charLength = 2; - break; - } - - // 1110XXXX - if (i <= 2 && c >> 4 == 0x0E) { - this.charLength = 3; - break; - } - - // 11110XXX - if (i <= 3 && c >> 3 == 0x1E) { - this.charLength = 4; - break; - } - } - this.charReceived = i; -}; - -StringDecoder.prototype.end = function(buffer) { - var res = ''; - if (buffer && buffer.length) - res = this.write(buffer); - - if (this.charReceived) { - var cr = this.charReceived; - var buf = this.charBuffer; - var enc = this.encoding; - res += buf.slice(0, cr).toString(enc); - } - - return res; -}; - -function passThroughWrite(buffer) { - return buffer.toString(this.encoding); + this.lastNeed = 0; + this.lastTotal = 0; + this.lastChar = bufferShim.allocUnsafe(nb); } -function utf16DetectIncompleteChar(buffer) { - this.charReceived = buffer.length % 2; - this.charLength = this.charReceived ? 2 : 0; +StringDecoder.prototype.write = function (buf) { + if (buf.length === 0) return ''; + var r; + var i; + if (this.lastNeed) { + r = this.fillLast(buf); + if (r === undefined) return ''; + i = this.lastNeed; + this.lastNeed = 0; + } else { + i = 0; + } + if (i < buf.length) return r ? r + this.text(buf, i) : this.text(buf, i); + return r || ''; +}; + +StringDecoder.prototype.end = utf8End; + +// Returns only complete characters in a Buffer +StringDecoder.prototype.text = utf8Text; + +// Attempts to complete a partial non-UTF-8 character using bytes from a Buffer +StringDecoder.prototype.fillLast = function (buf) { + if (this.lastNeed <= buf.length) { + buf.copy(this.lastChar, this.lastTotal - this.lastNeed, 0, this.lastNeed); + return this.lastChar.toString(this.encoding, 0, this.lastTotal); + } + buf.copy(this.lastChar, this.lastTotal - this.lastNeed, 0, buf.length); + this.lastNeed -= buf.length; +}; + +// Checks the type of a UTF-8 byte, whether it's ASCII, a leading byte, or a +// continuation byte. +function utf8CheckByte(byte) { + if (byte <= 0x7F) return 0;else if (byte >> 5 === 0x06) return 2;else if (byte >> 4 === 0x0E) return 3;else if (byte >> 3 === 0x1E) return 4; + return -1; } -function base64DetectIncompleteChar(buffer) { - this.charReceived = buffer.length % 3; - this.charLength = this.charReceived ? 3 : 0; +// Checks at most 3 bytes at the end of a Buffer in order to detect an +// incomplete multi-byte UTF-8 character. The total number of bytes (2, 3, or 4) +// needed to complete the UTF-8 character (if applicable) are returned. +function utf8CheckIncomplete(self, buf, i) { + var j = buf.length - 1; + if (j < i) return 0; + var nb = utf8CheckByte(buf[j]); + if (nb >= 0) { + if (nb > 0) self.lastNeed = nb - 1; + return nb; + } + if (--j < i) return 0; + nb = utf8CheckByte(buf[j]); + if (nb >= 0) { + if (nb > 0) self.lastNeed = nb - 2; + return nb; + } + if (--j < i) return 0; + nb = utf8CheckByte(buf[j]); + if (nb >= 0) { + if (nb > 0) { + if (nb === 2) nb = 0;else self.lastNeed = nb - 3; + } + return nb; + } + return 0; } -},{"buffer":5}],123:[function(require,module,exports){ +// Validates as many continuation bytes for a multi-byte UTF-8 character as +// needed or are available. If we see a non-continuation byte where we expect +// one, we "replace" the validated continuation bytes we've seen so far with +// UTF-8 replacement characters ('\ufffd'), to match v8's UTF-8 decoding +// behavior. The continuation byte check is included three times in the case +// where all of the continuation bytes for a character exist in the same buffer. +// It is also done this way as a slight performance increase instead of using a +// loop. +function utf8CheckExtraBytes(self, buf, p) { + if ((buf[0] & 0xC0) !== 0x80) { + self.lastNeed = 0; + return '\ufffd'.repeat(p); + } + if (self.lastNeed > 1 && buf.length > 1) { + if ((buf[1] & 0xC0) !== 0x80) { + self.lastNeed = 1; + return '\ufffd'.repeat(p + 1); + } + if (self.lastNeed > 2 && buf.length > 2) { + if ((buf[2] & 0xC0) !== 0x80) { + self.lastNeed = 2; + return '\ufffd'.repeat(p + 2); + } + } + } +} + +// Attempts to complete a multi-byte UTF-8 character using bytes from a Buffer. +function utf8FillLast(buf) { + var p = this.lastTotal - this.lastNeed; + var r = utf8CheckExtraBytes(this, buf, p); + if (r !== undefined) return r; + if (this.lastNeed <= buf.length) { + buf.copy(this.lastChar, p, 0, this.lastNeed); + return this.lastChar.toString(this.encoding, 0, this.lastTotal); + } + buf.copy(this.lastChar, p, 0, buf.length); + this.lastNeed -= buf.length; +} + +// Returns all complete UTF-8 characters in a Buffer. If the Buffer ended on a +// partial character, the character's bytes are buffered until the required +// number of bytes are available. +function utf8Text(buf, i) { + var total = utf8CheckIncomplete(this, buf, i); + if (!this.lastNeed) return buf.toString('utf8', i); + this.lastTotal = total; + var end = buf.length - (total - this.lastNeed); + buf.copy(this.lastChar, 0, end); + return buf.toString('utf8', i, end); +} + +// For UTF-8, a replacement character for each buffered byte of a (partial) +// character needs to be added to the output. +function utf8End(buf) { + var r = buf && buf.length ? this.write(buf) : ''; + if (this.lastNeed) return r + '\ufffd'.repeat(this.lastTotal - this.lastNeed); + return r; +} + +// UTF-16LE typically needs two bytes per character, but even if we have an even +// number of bytes available, we need to check if we end on a leading/high +// surrogate. In that case, we need to wait for the next two bytes in order to +// decode the last character properly. +function utf16Text(buf, i) { + if ((buf.length - i) % 2 === 0) { + var r = buf.toString('utf16le', i); + if (r) { + var c = r.charCodeAt(r.length - 1); + if (c >= 0xD800 && c <= 0xDBFF) { + this.lastNeed = 2; + this.lastTotal = 4; + this.lastChar[0] = buf[buf.length - 2]; + this.lastChar[1] = buf[buf.length - 1]; + return r.slice(0, -1); + } + } + return r; + } + this.lastNeed = 1; + this.lastTotal = 2; + this.lastChar[0] = buf[buf.length - 1]; + return buf.toString('utf16le', i, buf.length - 1); +} + +// For UTF-16LE we do not explicitly append special replacement characters if we +// end on a partial character, we simply let v8 handle that. +function utf16End(buf) { + var r = buf && buf.length ? this.write(buf) : ''; + if (this.lastNeed) { + var end = this.lastTotal - this.lastNeed; + return r + this.lastChar.toString('utf16le', 0, end); + } + return r; +} + +function base64Text(buf, i) { + var n = (buf.length - i) % 3; + if (n === 0) return buf.toString('base64', i); + this.lastNeed = 3 - n; + this.lastTotal = 3; + if (n === 1) { + this.lastChar[0] = buf[buf.length - 1]; + } else { + this.lastChar[0] = buf[buf.length - 2]; + this.lastChar[1] = buf[buf.length - 1]; + } + return buf.toString('base64', i, buf.length - n); +} + +function base64End(buf) { + var r = buf && buf.length ? this.write(buf) : ''; + if (this.lastNeed) return r + this.lastChar.toString('base64', 0, 3 - this.lastNeed); + return r; +} + +// Pass bytes on through for single-byte encodings (e.g. ascii, latin1, hex) +function simpleWrite(buf) { + return buf.toString(this.encoding); +} + +function simpleEnd(buf) { + return buf && buf.length ? this.write(buf) : ''; +} +},{"buffer":7,"buffer-shims":9}],113:[function(require,module,exports){ (function (process){ var Stream = require('stream') @@ -37000,7 +36594,7 @@ function through (write, end, opts) { }).call(this,require('_process')) -},{"_process":94,"stream":106}],124:[function(require,module,exports){ +},{"_process":94,"stream":111}],114:[function(require,module,exports){ "use strict" function unique_pred(list, compare) { @@ -37059,7 +36653,7 @@ function unique(list, compare, sorted) { module.exports = unique -},{}],125:[function(require,module,exports){ +},{}],115:[function(require,module,exports){ var mime = require('mime'); var fs = require('fs'); @@ -37069,7 +36663,7 @@ module.exports = function urifyNode (file) { return 'data:' + type + ';base64,' + data; }; -},{"fs":33,"mime":53}],126:[function(require,module,exports){ +},{"fs":6,"mime":53}],116:[function(require,module,exports){ (function (global){ /** @@ -37140,16 +36734,16 @@ function config (name) { } }).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {}) -},{}],127:[function(require,module,exports){ +},{}],117:[function(require,module,exports){ arguments[4][47][0].apply(exports,arguments) -},{"dup":47}],128:[function(require,module,exports){ +},{"dup":47}],118:[function(require,module,exports){ module.exports = function isBuffer(arg) { return arg && typeof arg === 'object' && typeof arg.copy === 'function' && typeof arg.fill === 'function' && typeof arg.readUInt8 === 'function'; } -},{}],129:[function(require,module,exports){ +},{}],119:[function(require,module,exports){ (function (process,global){ // Copyright Joyent, Inc. and other Node contributors. // @@ -37739,7 +37333,7 @@ function hasOwnProperty(obj, prop) { } }).call(this,require('_process'),typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {}) -},{"./support/isBuffer":128,"_process":94,"inherits":127}],130:[function(require,module,exports){ +},{"./support/isBuffer":118,"_process":94,"inherits":117}],120:[function(require,module,exports){ function AddStep(ref, image, name, o) { function addStep(image, name, o_) { @@ -37770,7 +37364,7 @@ function AddStep(ref, image, name, o) { } module.exports = AddStep; -},{}],131:[function(require,module,exports){ +},{}],121:[function(require,module,exports){ var fs = require('fs'); var getDirectories = function(rootDir, cb) { fs.readdir(rootDir, function(err, files) { @@ -37826,7 +37420,7 @@ module.exports = function ExportBin(dir = "./output/",ref) { }); } -},{"data-uri-to-buffer":11,"fs":33}],132:[function(require,module,exports){ +},{"data-uri-to-buffer":23,"fs":6}],122:[function(require,module,exports){ function objTypeOf(object){ return Object.prototype.toString.call(object).split(" ")[1].slice(0,-1) } @@ -37992,7 +37586,7 @@ function formatInput(args,format,images) { } module.exports = formatInput; -},{}],133:[function(require,module,exports){ +},{}],123:[function(require,module,exports){ if (typeof window !== 'undefined') {window.$ = window.jQuery = require('jquery'); isBrowser = true} else {var isBrowser = false} @@ -38216,7 +37810,7 @@ ImageSequencer = function ImageSequencer(options) { } module.exports = ImageSequencer; -},{"./AddStep":130,"./ExportBin":131,"./FormatInput":132,"./InsertStep":134,"./LoadImage":135,"./Modules":136,"./ReplaceImage":137,"./Run":138,"./UserInterface":139,"fs":33,"jquery":51}],134:[function(require,module,exports){ +},{"./AddStep":120,"./ExportBin":121,"./FormatInput":122,"./InsertStep":124,"./LoadImage":125,"./Modules":126,"./ReplaceImage":127,"./Run":128,"./UserInterface":129,"fs":6,"jquery":51}],124:[function(require,module,exports){ function InsertStep(ref, image, index, name, o) { function insertStep(image, index, name, o_) { @@ -38231,6 +37825,8 @@ function InsertStep(ref, image, index, name, o) { o.step = { name: o.name, + description: o.description, + url: o.url, ID: o.number, imageName: o.image, inBrowser: ref.options.inBrowser, @@ -38248,7 +37844,7 @@ function InsertStep(ref, image, index, name, o) { } module.exports = InsertStep; -},{}],135:[function(require,module,exports){ +},{}],125:[function(require,module,exports){ function LoadImage(ref, name, src, main_callback) { function makeImage(datauri) { var image = { @@ -38297,6 +37893,7 @@ function LoadImage(ref, name, src, main_callback) { function loadImage(name, src) { var step = { name: "load-image", + description: "This initial step loads and displays the original image without any modifications.", ID: ref.options.sequencerCounter++, imageName: name, inBrowser: ref.options.inBrowser, @@ -38353,7 +37950,7 @@ function LoadImage(ref, name, src, main_callback) { module.exports = LoadImage; -},{"urify":125}],136:[function(require,module,exports){ +},{"urify":115}],126:[function(require,module,exports){ /* * Core modules and their info files */ @@ -38381,7 +37978,7 @@ module.exports = { ] } -},{"./modules/Crop/Module":141,"./modules/Crop/info":142,"./modules/DecodeQr/Module":143,"./modules/DecodeQr/info":144,"./modules/FisheyeGl/Module":145,"./modules/FisheyeGl/info":146,"./modules/GreenChannel/Module":147,"./modules/GreenChannel/info":148,"./modules/Invert/Module":149,"./modules/Invert/info":150,"./modules/NdviRed/Module":151,"./modules/NdviRed/info":152,"./modules/SegmentedColormap/Module":153,"./modules/SegmentedColormap/info":155}],137:[function(require,module,exports){ +},{"./modules/Crop/Module":131,"./modules/Crop/info":132,"./modules/DecodeQr/Module":133,"./modules/DecodeQr/info":134,"./modules/FisheyeGl/Module":135,"./modules/FisheyeGl/info":136,"./modules/GreenChannel/Module":137,"./modules/GreenChannel/info":138,"./modules/Invert/Module":139,"./modules/Invert/info":140,"./modules/NdviRed/Module":141,"./modules/NdviRed/info":142,"./modules/SegmentedColormap/Module":143,"./modules/SegmentedColormap/info":145}],127:[function(require,module,exports){ function ReplaceImage(ref,selector,steps,options) { if(!ref.options.inBrowser) return false; // This isn't for Node.js var this_ = ref; @@ -38418,7 +38015,7 @@ function ReplaceImage(ref,selector,steps,options) { module.exports = ReplaceImage; -},{}],138:[function(require,module,exports){ +},{}],128:[function(require,module,exports){ function Run(ref, json_q, callback) { function drawStep(drawarray,pos) { if(pos==drawarray.length) { @@ -38467,7 +38064,7 @@ function Run(ref, json_q, callback) { } module.exports = Run; -},{}],139:[function(require,module,exports){ +},{}],129:[function(require,module,exports){ /* * User Interface Handling Module */ @@ -38535,7 +38132,7 @@ module.exports = function UserInterface(events = {}) { } -},{}],140:[function(require,module,exports){ +},{}],130:[function(require,module,exports){ (function (Buffer){ module.exports = function Crop(input,options,callback) { @@ -38581,7 +38178,7 @@ module.exports = function Crop(input,options,callback) { }; }).call(this,require("buffer").Buffer) -},{"buffer":5,"get-pixels":21,"save-pixels":105}],141:[function(require,module,exports){ +},{"buffer":7,"get-pixels":33,"save-pixels":110}],131:[function(require,module,exports){ /* * Image Cropping module * Usage: @@ -38642,7 +38239,7 @@ module.exports = function Crop(input,options,callback) { } } -},{"./Crop":140}],142:[function(require,module,exports){ +},{"./Crop":130}],132:[function(require,module,exports){ module.exports={ "name": "Crop", "description": "Crop image to given x, y, w, h", @@ -38671,7 +38268,7 @@ module.exports={ } } -},{}],143:[function(require,module,exports){ +},{}],133:[function(require,module,exports){ /* * Decodes QR from a given image. */ @@ -38727,7 +38324,7 @@ module.exports = function DoNothing(options,UI) { } } -},{"get-pixels":21,"jsqr":52}],144:[function(require,module,exports){ +},{"get-pixels":33,"jsqr":52}],134:[function(require,module,exports){ module.exports={ "name": "Decode QR", "inputs": { @@ -38739,7 +38336,7 @@ module.exports={ } } -},{}],145:[function(require,module,exports){ +},{}],135:[function(require,module,exports){ /* * Resolves Fisheye Effect */ @@ -38823,7 +38420,7 @@ module.exports = function DoNothing(options,UI) { } } -},{"fisheyegl":13}],146:[function(require,module,exports){ +},{"fisheyegl":25}],136:[function(require,module,exports){ module.exports={ "name": "Fisheye GL", "inputs": { @@ -38889,7 +38486,7 @@ module.exports={ } } -},{}],147:[function(require,module,exports){ +},{}],137:[function(require,module,exports){ /* * Display only the green channel */ @@ -38944,18 +38541,18 @@ module.exports = function GreenChannel(options,UI) { } } -},{"../_nomodule/PixelManipulation.js":156}],148:[function(require,module,exports){ +},{"../_nomodule/PixelManipulation.js":146}],138:[function(require,module,exports){ module.exports={ "name": "Green Channel", "inputs": { } } -},{}],149:[function(require,module,exports){ +},{}],139:[function(require,module,exports){ /* - * Display only the green channel + * Invert the image */ -module.exports = function GreenChannel(options,UI) { +module.exports = function Invert(options,UI) { options = options || {}; options.title = "Invert Colors"; @@ -39007,14 +38604,15 @@ module.exports = function GreenChannel(options,UI) { } } -},{"../_nomodule/PixelManipulation.js":156}],150:[function(require,module,exports){ +},{"../_nomodule/PixelManipulation.js":146}],140:[function(require,module,exports){ module.exports={ "name": "Invert", + "description": "Inverts the image.", "inputs": { } } -},{}],151:[function(require,module,exports){ +},{}],141:[function(require,module,exports){ /* * NDVI with red filter (blue channel is infrared) */ @@ -39070,14 +38668,14 @@ module.exports = function NdviRed(options,UI) { } } -},{"../_nomodule/PixelManipulation.js":156}],152:[function(require,module,exports){ +},{"../_nomodule/PixelManipulation.js":146}],142:[function(require,module,exports){ module.exports={ "name": "NDVI Red", "inputs": { } } -},{}],153:[function(require,module,exports){ +},{}],143:[function(require,module,exports){ module.exports = function SegmentedColormap(options,UI) { options = options || {}; @@ -39130,7 +38728,7 @@ module.exports = function SegmentedColormap(options,UI) { } } -},{"../_nomodule/PixelManipulation.js":156,"./SegmentedColormap":154}],154:[function(require,module,exports){ +},{"../_nomodule/PixelManipulation.js":146,"./SegmentedColormap":144}],144:[function(require,module,exports){ /* * Accepts a value from 0-255 and returns the new color-mapped pixel * from a lookup table, which can be specified as an array of [begin, end] @@ -39190,10 +38788,10 @@ var colormaps = { [1, [255, 255, 255], [255, 255, 255] ] ]), default: segmented_colormap([ - [0, [0, 0, 255], [0, 255, 0] ], + [0, [0, 0, 255], [0, 255, 0] ], [0.25, [0, 255, 0], [255, 255, 0] ], [0.50, [0, 255, 255], [255, 255, 0] ], - [0.75, [255, 255, 0], [255, 0, 0] ] + [0.75, [255, 255, 0], [255, 0, 0] ] ]), ndvi: segmented_colormap([ [0, [0, 0, 255], [38, 195, 195] ], @@ -39219,7 +38817,7 @@ var colormaps = { ]) } -},{}],155:[function(require,module,exports){ +},{}],145:[function(require,module,exports){ module.exports={ "name": "Segmented Colormap", "inputs": { @@ -39232,7 +38830,7 @@ module.exports={ } } -},{}],156:[function(require,module,exports){ +},{}],146:[function(require,module,exports){ (function (Buffer){ /* * General purpose per-pixel manipulation @@ -39296,4 +38894,4 @@ module.exports = function PixelManipulation(image, options) { }; 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l=e("uniq");t.exports=function(e,t){for(var n=t[1].length-Math.abs(e.arrayBlockIndices[0])|0,u=new Array(e.arrayArgs.length),c=new Array(e.arrayArgs.length),f=0;f0&&_.push("shape=SS.slice(0)"),e.indexArgs.length>0){for(var x=new Array(n),f=0;f0&&y.push("var "+_.join(","));for(f=0;f3&&y.push(o(e.pre,e,c));var T=o(e.body,e,c),A=a(m);A3&&y.push(o(e.post,e,c)),e.debug&&console.log("-----Generated cwise routine for ",t,":\n"+y.join("\n")+"\n----------");var C=[e.funcName||"unnamed","_cwise_loop_",u[0].join("s"),"m",A,s(c)].join("");return new Function(["function ",C,"(",b.join(","),"){",y.join("\n"),"} return ",C].join(""))()}},{uniq:124}],10:[function(e,t,n){"use strict";var r=e("./compile.js");t.exports=function(e){var t=["'use strict'","var CACHED={}"],n=[],i=e.funcName+"_cwise_thunk";t.push(["return function ",i,"(",e.shimArgs.join(","),"){"].join(""));for(var a=[],o=[],s=[["array",e.arrayArgs[0],".shape.slice(",Math.max(0,e.arrayBlockIndices[0]),e.arrayBlockIndices[0]<0?","+e.arrayBlockIndices[0]+")":")"].join("")],l=[],u=[],c=0;c0&&(l.push("array"+e.arrayArgs[0]+".shape.length===array"+f+".shape.length+"+(Math.abs(e.arrayBlockIndices[0])-Math.abs(e.arrayBlockIndices[c]))),u.push("array"+e.arrayArgs[0]+".shape[shapeIndex+"+Math.max(0,e.arrayBlockIndices[0])+"]===array"+f+".shape[shapeIndex+"+Math.max(0,e.arrayBlockIndices[c])+"]"))}e.arrayArgs.length>1&&(t.push("if (!("+l.join(" && ")+")) throw new Error('cwise: Arrays do not all have the same dimensionality!')"),t.push("for(var shapeIndex=array"+e.arrayArgs[0]+".shape.length-"+Math.abs(e.arrayBlockIndices[0])+"; shapeIndex--\x3e0;) {"),t.push("if (!("+u.join(" && ")+")) throw new Error('cwise: Arrays do not all have the same shape!')"),t.push("}"));for(c=0;c0&&this._events[e].length>n&&(this._events[e].warned=!0,console.error("(node) warning: possible EventEmitter memory leak detected. %d 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Use emitter.setMaxListeners() to increase limit.",this._events[e].length),"function"==typeof console.trace&&console.trace()),this},r.prototype.on=r.prototype.addListener,r.prototype.once=function(e,t){function n(){this.removeListener(e,n),r||(r=!0,t.apply(this,arguments))}if(!i(t))throw TypeError("listener must be a function");var r=!1;return n.listener=t,this.on(e,n),this},r.prototype.removeListener=function(e,t){var n,r,a,s;if(!i(t))throw TypeError("listener must be a function");if(!this._events||!this._events[e])return this;if(n=this._events[e],a=n.length,r=-1,n===t||i(n.listener)&&n.listener===t)delete this._events[e],this._events.removeListener&&this.emit("removeListener",e,t);else if(o(n)){for(s=a;s-- >0;)if(n[s]===t||n[s].listener&&n[s].listener===t){r=s;break}if(r<0)return this;1===n.length?(n.length=0,delete this._events[e]):n.splice(r,1),this._events.removeListener&&this.emit("removeListener",e,t)}return this},r.prototype.removeAllListeners=function(e){var t,n;if(!this._events)return this;if(!this._events.removeListener)return 0===arguments.length?this._events={}:this._events[e]&&delete this._events[e],this;if(0===arguments.length){for(t in this._events)"removeListener"!==t&&this.removeAllListeners(t);return this.removeAllListeners("removeListener"),this._events={},this}if(n=this._events[e],i(n))this.removeListener(e,n);else if(n)for(;n.length;)this.removeListener(e,n[n.length-1]);return delete this._events[e],this},r.prototype.listeners=function(e){return this._events&&this._events[e]?i(this._events[e])?[this._events[e]]:this._events[e].slice():[]},r.prototype.listenerCount=function(e){if(this._events){var t=this._events[e];if(i(t))return 1;if(t)return t.length}return 0},r.listenerCount=function(e,t){return e.listenerCount(t)}},{}],13:[function(e,t,n){var r=function(t){function n(e,t){if(h.hasOwnProperty(e))return h[e];var n=new XMLHttpRequest;if(t)n.addEventListener("readystatechange",function(){4===n.readyState&&(200===n.status?t(null,n.responseText):t(new Error("fail to load!")))}),n.open("GET",e,!0),n.send(null);else if(n.open("GET",e,!1),n.send(null),200==n.status)return n.responseText}function r(e,t,n,r){return r=r||e.createTexture(),e.bindTexture(e.TEXTURE_2D,r),e.texImage2D(e.TEXTURE_2D,0,e.RGBA,e.RGBA,e.UNSIGNED_BYTE,t),e.texParameteri(e.TEXTURE_2D,e.TEXTURE_MAG_FILTER,e.LINEAR),e.texParameteri(e.TEXTURE_2D,e.TEXTURE_MIN_FILTER,e.LINEAR),e.texParameteri(e.TEXTURE_2D,e.TEXTURE_WRAP_S,e.CLAMP_TO_EDGE),e.texParameteri(e.TEXTURE_2D,e.TEXTURE_WRAP_T,e.CLAMP_TO_EDGE),e.bindTexture(e.TEXTURE_2D,null),n&&n(null,r),r}function i(e,n,i){var a=e.createTexture(),s=new Image;return s.addEventListener("load",function(){r(e,s,i,a),t.width=s.width,t.height=s.height,o(t.width,t.height)}),s.src=n,a}function a(e,n){function r(o){a||(a=o);var s=o-a;a=o,t.runner(s),n&&n(),!0===e&&i(r)}var i=window.requestAnimationFrame||window.mozRequestAnimationFrame||window.webkitRequestAnimationFrame||window.msRequestAnimationFrame;if(!0===e){if(!i)throw new Error("do not support 'requestAnimationFram'");i(r)}else i(r);var a=null}function o(e,t){p.viewport(0,0,e,t),p.canvas.width=e,p.canvas.height=t}function s(e,n){T=i(p,e,function(){a(t.animate,n)})}(t=t||{}).width=t.width||800,t.height=t.height||600;var l=t.model||{vertex:[-1,-1,0,1,-1,0,1,1,0,-1,1,0],indices:[0,1,2,0,2,3,2,1,0,3,2,0],textureCoords:[0,0,1,0,1,1,0,1]},u=t.lens||{a:1,b:1,Fx:0,Fy:0,scale:1.5},c=t.fov||{x:1,y:1},f=t.image||"images/barrel-distortion.png",p=function(e){var t=document.querySelector(e);if(null==t)throw new Error("there is no canvas on this page");for(var n=["webgl","experimental-webgl","webkit-3d","moz-webgl"],r=0;r 0.99 || vMapping.x < 0.01 || vMapping.y > 0.99 || vMapping.y < 0.01){\n\t\ttexture = vec4(0.0, 0.0, 0.0, 1.0);\n\t} \n\tgl_FragColor = texture;\n}\n"},{}],16:[function(e,t,n){t.exports="#ifdef GL_ES\nprecision highp float;\n#endif\nuniform vec4 uLens;\nuniform vec2 uFov;\nuniform sampler2D uSampler;\nvarying vec3 vPosition;\nvarying vec2 vTextureCoord;\nvec2 TextureCoord2GLCoord(vec2 textureCoord) {\n\treturn (textureCoord - vec2(0.5, 0.5)) * 2.0;\n}\nvec2 GLCoord2TextureCoord(vec2 glCoord) {\n\treturn glCoord / 2.0 + vec2(0.5, 0.5);\n}\nvoid main(void){\n\tfloat correctionRadius = 0.5;\n\tfloat distance = sqrt(vPosition.x * vPosition.x + vPosition.y * vPosition.y) / correctionRadius;\n\tfloat theta = 1.0;\n\tif(distance != 0.0){\n\t\ttheta = atan(distance);\n\t}\n\tvec2 vMapping = theta * vPosition.xy;\n\tvMapping = GLCoord2TextureCoord(vMapping);\n\t\t\n\tvec4 texture = texture2D(uSampler, vMapping);\n\tif(vMapping.x > 0.99 || vMapping.x < 0.01 || vMapping.y > 0.99 || vMapping.y < 0.01){\n\t\ttexture = vec4(0.0, 0.0, 0.0, 1.0);\n\t} \n\tgl_FragColor = texture;\n}\n"},{}],17:[function(e,t,n){t.exports="#ifdef GL_ES\nprecision highp float;\n#endif\nuniform vec3 uLensS;\nuniform vec2 uLensF;\nuniform vec2 uFov;\nuniform sampler2D uSampler;\nvarying vec3 vPosition;\nvarying vec2 vTextureCoord;\nvec2 GLCoord2TextureCoord(vec2 glCoord) {\n\treturn glCoord * vec2(1.0, -1.0)/ 2.0 + vec2(0.5, 0.5);\n}\nvoid main(void){\n\tfloat scale = uLensS.z;\n\tvec3 vPos = vPosition;\n\tfloat Fx = uLensF.x;\n\tfloat Fy = uLensF.y;\n\tvec2 vMapping = vPos.xy;\n\tvMapping.x = vMapping.x + ((pow(vPos.y, 2.0)/scale)*vPos.x/scale)*-Fx;\n\tvMapping.y = vMapping.y + ((pow(vPos.x, 2.0)/scale)*vPos.y/scale)*-Fy;\n\tvMapping = vMapping * uLensS.xy;\n\tvMapping = GLCoord2TextureCoord(vMapping/scale);\n\tvec4 texture = texture2D(uSampler, vMapping);\n\tif(vMapping.x > 0.99 || vMapping.x < 0.01 || vMapping.y > 0.99 || vMapping.y < 0.01){\n\t\ttexture = vec4(0.0, 0.0, 0.0, 1.0);\n\t}\n\tgl_FragColor = texture;\n}\n"},{}],18:[function(e,t,n){t.exports="#ifdef GL_ES\nprecision highp float;\n#endif\nuniform vec4 uLens;\nuniform vec2 uFov;\nuniform sampler2D uSampler;\nvarying vec3 vPosition;\nvarying vec2 vTextureCoord;\nvec2 TextureCoord2GLCoord(vec2 textureCoord) {\n\treturn (textureCoord - vec2(0.5, 0.5)) * 2.0;\n}\nvec2 GLCoord2TextureCoord(vec2 glCoord) {\n\treturn glCoord / 2.0 + vec2(0.5, 0.5);\n}\nvoid main(void){\n\tvec2 vMapping = vec2(vTextureCoord.x, 1.0 - vTextureCoord.y);\n\tvMapping = TextureCoord2GLCoord(vMapping);\n\t//TODO insert Code\n\tfloat F = uLens.x/ uLens.w;\n\tfloat seta = length(vMapping) / F;\n\tvMapping = sin(seta) * F / length(vMapping) * vMapping;\n\tvMapping *= uLens.w * 1.414;\n\tvMapping = GLCoord2TextureCoord(vMapping);\n\tvec4 texture = texture2D(uSampler, vMapping);\n\tif(vMapping.x > 0.99 || vMapping.x < 0.01 || vMapping.y > 0.99 || vMapping.y < 0.01){\n\t\ttexture = vec4(0.0, 0.0, 0.0, 1.0);\n\t} \n\tgl_FragColor = texture;\n}\n"},{}],19:[function(e,t,n){t.exports="#ifdef GL_ES\nprecision highp float;\n#endif\nuniform vec4 uLens;\nuniform vec2 uFov;\nuniform sampler2D uSampler;\nvarying vec3 vPosition;\nvarying vec2 vTextureCoord;\nvec2 TextureCoord2GLCoord(vec2 textureCoord) {\n\treturn (textureCoord - vec2(0.5, 0.5)) * 2.0;\n}\nvec2 GLCoord2TextureCoord(vec2 glCoord) {\n\treturn glCoord / 2.0 + vec2(0.5, 0.5);\n}\nvoid main(void){\n\tvec2 vMapping = vec2(vTextureCoord.x, 1.0 - vTextureCoord.y);\n\tvMapping = TextureCoord2GLCoord(vMapping);\n\t//TOD insert Code\n\tfloat F = uLens.x/ uLens.w;\n\tfloat seta = length(vMapping) / F;\n\tvMapping = sin(seta) * F / length(vMapping) * vMapping;\n\tvMapping *= uLens.w * 1.414;\n\tvMapping = GLCoord2TextureCoord(vMapping);\n\tvec4 texture = texture2D(uSampler, vMapping);\n\tif(vMapping.x > 0.99 || vMapping.x < 0.01 || vMapping.y > 0.99 || vMapping.y < 0.01){\n\t\ttexture = vec4(0.0, 0.0, 0.0, 1.0);\n\t} \n\tgl_FragColor = texture;\n}\n"},{}],20:[function(e,t,n){t.exports="#ifdef GL_ES\nprecision highp float;\n#endif\nattribute vec3 aVertexPosition;\nattribute vec2 aTextureCoord;\nvarying vec3 vPosition;\nvarying vec2 vTextureCoord;\nvoid 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