lz4.js

require=(function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({"./utils":[function(require,module,exports){
/**
 * Javascript emulated bindings
 */
var XXH = require('xxhashjs')

var CHECKSUM_SEED = 0

// Header checksum is second byte of xxhash using 0 as a seed
exports.descriptorChecksum = function (d) {
	return (XXH(d, CHECKSUM_SEED).toNumber() >> 8) & 0xFF
}

exports.blockChecksum = function (d) {
	return XXH(d, CHECKSUM_SEED).toNumber()
}

exports.streamChecksum = function (d, c) {
	if (d === null)
		return c.digest().toNumber()

	if (c === null)
		c = XXH(CHECKSUM_SEED)

	return c.update(d)
}

// Provide simple readInt32LE as the Buffer ones from node and browserify are incompatible
exports.readInt32LE = function (buffer, offset) {
	return (buffer[offset]) |
      (buffer[offset + 1] << 8) |
      (buffer[offset + 2] << 16) |
      (buffer[offset + 3] << 24)
}

exports.bindings = require('./binding')

},{"./binding":1,"xxhashjs":10}],1:[function(require,module,exports){
/**
	Javascript version of the key LZ4 C functions
 */
var uint32 = require('cuint').UINT32

if (!Math.imul) Math.imul = function imul(a, b) {
	var ah = a >>> 16;
	var al = a & 0xffff;
	var bh = b >>> 16;
	var bl = b & 0xffff;
	return (al*bl + ((ah*bl + al*bh) << 16))|0;
};

/**
 * Decode a block. Assumptions: input contains all sequences of a 
 * chunk, output is large enough to receive the decoded data.
 * If the output buffer is too small, an error will be thrown.
 * If the returned value is negative, an error occured at the returned offset.
 *
 * @param input {Buffer} input data
 * @param output {Buffer} output data
 * @return {Number} number of decoded bytes
 * @private
 */
exports.uncompress = function (input, output, sIdx, eIdx) {
	sIdx = sIdx || 0
	eIdx = eIdx || (input.length - sIdx)
	// Process each sequence in the incoming data
	for (var i = sIdx, n = eIdx, j = 0; i < n;) {
		var token = input[i++]

		// Literals
		var literals_length = (token >> 4)
		if (literals_length > 0) {
			// length of literals
			var l = literals_length + 240
			while (l === 255) {
				l = input[i++]
				literals_length += l
			}

			// Copy the literals
			var end = i + literals_length
			while (i < end) output[j++] = input[i++]

			// End of buffer?
			if (i === n) return j
		}

		// Match copy
		// 2 bytes offset (little endian)
		var offset = input[i++] | (input[i++] << 8)

		// 0 is an invalid offset value
		if (offset === 0 || offset > j) return -(i-2)

		// length of match copy
		var match_length = (token & 0xf)
		var l = match_length + 240
		while (l === 255) {
			l = input[i++]
			match_length += l
		}

		// Copy the match
		var pos = j - offset // position of the match copy in the current output
		var end = j + match_length + 4 // minmatch = 4
		while (j < end) output[j++] = output[pos++]
	}

	return j
}

var
	maxInputSize	= 0x7E000000
,	minMatch		= 4
// uint32() optimization
,	hashLog			= 16
,	hashShift		= (minMatch * 8) - hashLog
,	hashSize		= 1 << hashLog

,	copyLength		= 8
,	lastLiterals	= 5
,	mfLimit			= copyLength + minMatch
,	skipStrength	= 6

,	mlBits  		= 4
,	mlMask  		= (1 << mlBits) - 1
,	runBits 		= 8 - mlBits
,	runMask 		= (1 << runBits) - 1

,	hasher 			= 2654435761

// CompressBound returns the maximum length of a lz4 block, given it's uncompressed length
exports.compressBound = function (isize) {
	return isize > maxInputSize
		? 0
		: (isize + (isize/255) + 16) | 0
}

exports.compress = function (src, dst, sIdx, eIdx) {
	// V8 optimization: non sparse array with integers
	var hashTable = new Array(hashSize)
	for (var i = 0; i < hashSize; i++) {
		hashTable[i] = 0
	}
	return compressBlock(src, dst, 0, hashTable, sIdx || 0, eIdx || dst.length)
}

exports.compressHC = exports.compress

exports.compressDependent = compressBlock

function compressBlock (src, dst, pos, hashTable, sIdx, eIdx) {
	var dpos = sIdx
	var dlen = eIdx - sIdx
	var anchor = 0

	if (src.length >= maxInputSize) throw new Error("input too large")

	// Minimum of input bytes for compression (LZ4 specs)
	if (src.length > mfLimit) {
		var n = exports.compressBound(src.length)
		if ( dlen < n ) throw Error("output too small: " + dlen + " < " + n)

		var 
			step  = 1
		,	findMatchAttempts = (1 << skipStrength) + 3
		// Keep last few bytes incompressible (LZ4 specs):
		// last 5 bytes must be literals
		,	srcLength = src.length - mfLimit

		while (pos + minMatch < srcLength) {
			// Find a match
			// min match of 4 bytes aka sequence
			var sequenceLowBits = src[pos+1]<<8 | src[pos]
			var sequenceHighBits = src[pos+3]<<8 | src[pos+2]
			// compute hash for the current sequence
			var hash = Math.imul(sequenceLowBits | (sequenceHighBits << 16), hasher) >>> hashShift
			// get the position of the sequence matching the hash
			// NB. since 2 different sequences may have the same hash
			// it is double-checked below
			// do -1 to distinguish between initialized and uninitialized values
			var ref = hashTable[hash] - 1
			// save position of current sequence in hash table
			hashTable[hash] = pos + 1

			// first reference or within 64k limit or current sequence !== hashed one: no match
			if ( ref < 0 ||
				((pos - ref) >>> 16) > 0 ||
				(
					((src[ref+3]<<8 | src[ref+2]) != sequenceHighBits) ||
					((src[ref+1]<<8 | src[ref]) != sequenceLowBits )
				)
			) {
				// increase step if nothing found within limit
				step = findMatchAttempts++ >> skipStrength
				pos += step
				continue
			}

			findMatchAttempts = (1 << skipStrength) + 3

			// got a match
			var literals_length = pos - anchor
			var offset = pos - ref

			// minMatch already verified
			pos += minMatch
			ref += minMatch

			// move to the end of the match (>=minMatch)
			var match_length = pos
			while (pos < srcLength && src[pos] == src[ref]) {
				pos++
				ref++
			}

			// match length
			match_length = pos - match_length

			// token
			var token = match_length < mlMask ? match_length : mlMask

			// encode literals length
			if (literals_length >= runMask) {
				// add match length to the token
				dst[dpos++] = (runMask << mlBits) + token
				for (var len = literals_length - runMask; len > 254; len -= 255) {
					dst[dpos++] = 255
				}
				dst[dpos++] = len
			} else {
				// add match length to the token
				dst[dpos++] = (literals_length << mlBits) + token
			}

			// write literals
			for (var i = 0; i < literals_length; i++) {
				dst[dpos++] = src[anchor+i]
			}

			// encode offset
			dst[dpos++] = offset
			dst[dpos++] = (offset >> 8)

			// encode match length
			if (match_length >= mlMask) {
				match_length -= mlMask
				while (match_length >= 255) {
					match_length -= 255
					dst[dpos++] = 255
				}

				dst[dpos++] = match_length
			}

			anchor = pos
		}
	}

	// cannot compress input
	if (anchor == 0) return 0

	// Write last literals
	// encode literals length
	literals_length = src.length - anchor
	if (literals_length >= runMask) {
		// add match length to the token
		dst[dpos++] = (runMask << mlBits)
		for (var ln = literals_length - runMask; ln > 254; ln -= 255) {
			dst[dpos++] = 255
		}
		dst[dpos++] = ln
	} else {
		// add match length to the token
		dst[dpos++] = (literals_length << mlBits)
	}

	// write literals
	pos = anchor
	while (pos < src.length) {
		dst[dpos++] = src[pos++]
	}

	return dpos
}

},{"cuint":7}],2:[function(require,module,exports){
(function (Buffer){
var Decoder = require('./decoder_stream')

/**
	Decode an LZ4 stream
 */
function LZ4_uncompress (input, options) {
	var output = []
	var decoder = new Decoder(options)

	decoder.on('data', function (chunk) {
		output.push(chunk)
	})

	decoder.end(input)

	return Buffer.concat(output)
}

exports.LZ4_uncompress = LZ4_uncompress
}).call(this,require("buffer").Buffer)
},{"./decoder_stream":3,"buffer":"buffer"}],3:[function(require,module,exports){
(function (Buffer){
var Transform = require('stream').Transform
var inherits = require('util').inherits

var lz4_static = require('./static')
var utils = lz4_static.utils
var lz4_binding = utils.bindings
var lz4_jsbinding = require('./binding')

var STATES = lz4_static.STATES
var SIZES = lz4_static.SIZES

function Decoder (options) {
	if ( !(this instanceof Decoder) )
		return new Decoder(options)
	
	Transform.call(this, options)
	// Options
	this.options = options || {}

	this.binding = this.options.useJS ? lz4_jsbinding : lz4_binding

	// Encoded data being processed
	this.buffer = null
	// Current position within the data
	this.pos = 0
	this.descriptor = null

	// Current state of the parsing
	this.state = STATES.MAGIC

	this.notEnoughData = false
	this.descriptorStart = 0
	this.streamSize = null
	this.dictId = null
	this.currentStreamChecksum = null
	this.dataBlockSize = 0
	this.skippableSize = 0
}
inherits(Decoder, Transform)

Decoder.prototype._transform = function (data, encoding, done) {
	// Handle skippable data
	if (this.skippableSize > 0) {
		this.skippableSize -= data.length
		if (this.skippableSize > 0) {
			// More to skip
			done()
			return
		}

		data = data.slice(-this.skippableSize)
		this.skippableSize = 0
		this.state = STATES.MAGIC
	}
	// Buffer the incoming data
	this.buffer = this.buffer
					? Buffer.concat( [ this.buffer, data ], this.buffer.length + data.length )
					: data

	this._main(done)
}

Decoder.prototype.emit_Error = function (msg) {
	this.emit( 'error', new Error(msg + ' @' + this.pos) )
}

Decoder.prototype.check_Size = function (n) {
	var delta = this.buffer.length - this.pos
	if (delta <= 0 || delta < n) {
		if (this.notEnoughData) this.emit_Error( 'Unexpected end of LZ4 stream' )
		return true
	}

	this.pos += n
	return false
}

Decoder.prototype.read_MagicNumber = function () {
	var pos = this.pos
	if ( this.check_Size(SIZES.MAGIC) ) return true

	var magic = utils.readInt32LE(this.buffer, pos)

	// Skippable chunk
	if ( (magic & 0xFFFFFFF0) === lz4_static.MAGICNUMBER_SKIPPABLE ) {
		this.state = STATES.SKIP_SIZE
		return
	}

	// LZ4 stream
	if ( magic !== lz4_static.MAGICNUMBER ) {
		this.pos = pos
		this.emit_Error( 'Invalid magic number: ' + magic.toString(16).toUpperCase() )
		return true
	}

	this.state = STATES.DESCRIPTOR
}

Decoder.prototype.read_SkippableSize = function () {
	var pos = this.pos
	if ( this.check_Size(SIZES.SKIP_SIZE) ) return true
	this.state = STATES.SKIP_DATA
	this.skippableSize = utils.readInt32LE(this.buffer, pos)
}

Decoder.prototype.read_Descriptor = function () {
	// Flags
	var pos = this.pos
	if ( this.check_Size(SIZES.DESCRIPTOR) ) return true

	this.descriptorStart = pos

	// version
	var descriptor_flg = this.buffer[pos]
	var version = descriptor_flg >> 6
	if ( version !== lz4_static.VERSION ) {
		this.pos = pos
		this.emit_Error( 'Invalid version: ' + version + ' != ' + lz4_static.VERSION )
		return true
	}

	// flags
	// reserved bit should not be set
	if ( (descriptor_flg >> 1) & 0x1 ) {
		this.pos = pos
		this.emit_Error('Reserved bit set')
		return true
	}

	var blockMaxSizeIndex = (this.buffer[pos+1] >> 4) & 0x7
	var blockMaxSize = lz4_static.blockMaxSizes[ blockMaxSizeIndex ]
	if ( blockMaxSize === null ) {
		this.pos = pos
		this.emit_Error( 'Invalid block max size: ' + blockMaxSizeIndex )
		return true
	}

	this.descriptor = {
		blockIndependence: Boolean( (descriptor_flg >> 5) & 0x1 )
	,	blockChecksum: Boolean( (descriptor_flg >> 4) & 0x1 )
	,	blockMaxSize: blockMaxSize
	,	streamSize: Boolean( (descriptor_flg >> 3) & 0x1 )
	,	streamChecksum: Boolean( (descriptor_flg >> 2) & 0x1 )
	,	dict: Boolean( descriptor_flg & 0x1 )
	,	dictId: 0
	}

	this.state = STATES.SIZE
}

Decoder.prototype.read_Size = function () {
	if (this.descriptor.streamSize) {
		var pos = this.pos
		if ( this.check_Size(SIZES.SIZE) ) return true
		//TODO max size is unsigned 64 bits
		this.streamSize = this.buffer.slice(pos, pos + 8)
	}

	this.state = STATES.DICTID
}

Decoder.prototype.read_DictId = function () {
	if (this.descriptor.dictId) {
		var pos = this.pos
		if ( this.check_Size(SIZES.DICTID) ) return true
		this.dictId = utils.readInt32LE(this.buffer, pos)
	}

	this.state = STATES.DESCRIPTOR_CHECKSUM
}

Decoder.prototype.read_DescriptorChecksum = function () {
	var pos = this.pos
	if ( this.check_Size(SIZES.DESCRIPTOR_CHECKSUM) ) return true

	var checksum = this.buffer[pos]
	var currentChecksum = utils.descriptorChecksum( this.buffer.slice(this.descriptorStart, pos) )
	if (currentChecksum !== checksum) {
		this.pos = pos
		this.emit_Error( 'Invalid stream descriptor checksum' )
		return true
	}

	this.state = STATES.DATABLOCK_SIZE
}

Decoder.prototype.read_DataBlockSize = function () {
	var pos = this.pos
	if ( this.check_Size(SIZES.DATABLOCK_SIZE) ) return true
	var datablock_size = utils.readInt32LE(this.buffer, pos)
	// Uncompressed
	if ( datablock_size === lz4_static.EOS ) {
		this.state = STATES.EOS
		return
	}

// if (datablock_size > this.descriptor.blockMaxSize) {
// 	this.emit_Error( 'ASSERTION: invalid datablock_size: ' + datablock_size.toString(16).toUpperCase() + ' > ' + this.descriptor.blockMaxSize.toString(16).toUpperCase() )
// }
	this.dataBlockSize = datablock_size

	this.state = STATES.DATABLOCK_DATA
}

Decoder.prototype.read_DataBlockData = function () {
	var pos = this.pos
	var datablock_size = this.dataBlockSize
	if ( datablock_size & 0x80000000 ) {
		// Uncompressed size
		datablock_size = datablock_size & 0x7FFFFFFF
	}
	if ( this.check_Size(datablock_size) ) return true

	this.dataBlock = this.buffer.slice(pos, pos + datablock_size)

	this.state = STATES.DATABLOCK_CHECKSUM
}

Decoder.prototype.read_DataBlockChecksum = function () {
	var pos = this.pos
	if (this.descriptor.blockChecksum) {
		if ( this.check_Size(SIZES.DATABLOCK_CHECKSUM) ) return true
		var checksum = utils.readInt32LE(this.buffer, this.pos-4)
		var currentChecksum = utils.blockChecksum( this.dataBlock )
		if (currentChecksum !== checksum) {
			this.pos = pos
			this.emit_Error( 'Invalid block checksum' )
			return true
		}
	}

	this.state = STATES.DATABLOCK_UNCOMPRESS
}

Decoder.prototype.uncompress_DataBlock = function () {
	var uncompressed
	// uncompressed?
	if ( this.dataBlockSize & 0x80000000 ) {
		uncompressed = this.dataBlock
	} else {
		uncompressed = new Buffer(this.descriptor.blockMaxSize)
		var decodedSize = this.binding.uncompress( this.dataBlock, uncompressed )
		if (decodedSize < 0) {
			this.emit_Error( 'Invalid data block: ' + (-decodedSize) )
			return true
		}
		if ( decodedSize < this.descriptor.blockMaxSize )
			uncompressed = uncompressed.slice(0, decodedSize)
	}
	this.dataBlock = null
	this.push( uncompressed )

	// Stream checksum
	if (this.descriptor.streamChecksum) {
		this.currentStreamChecksum = utils.streamChecksum(uncompressed, this.currentStreamChecksum)
	}

	this.state = STATES.DATABLOCK_SIZE
}

Decoder.prototype.read_EOS = function () {
	if (this.descriptor.streamChecksum) {
		var pos = this.pos
		if ( this.check_Size(SIZES.EOS) ) return true
		var checksum = utils.readInt32LE(this.buffer, pos)
		if ( checksum !== utils.streamChecksum(null, this.currentStreamChecksum) ) {
			this.pos = pos
			this.emit_Error( 'Invalid stream checksum: ' + checksum.toString(16).toUpperCase() )
			return true
		}
	}

	this.state = STATES.MAGIC
}

Decoder.prototype._flush = function (done) {
	// Error on missing data as no more will be coming
	this.notEnoughData = true
	this._main(done)
}

Decoder.prototype._main = function (done) {
	var pos = this.pos
	var notEnoughData

	while ( !notEnoughData && this.pos < this.buffer.length ) {
		if (this.state === STATES.MAGIC)
			notEnoughData = this.read_MagicNumber()

		if (this.state === STATES.SKIP_SIZE)
			notEnoughData = this.read_SkippableSize()

		if (this.state === STATES.DESCRIPTOR)
			notEnoughData = this.read_Descriptor()

		if (this.state === STATES.SIZE)
			notEnoughData = this.read_Size()

		if (this.state === STATES.DICTID)
			notEnoughData = this.read_DictId()

		if (this.state === STATES.DESCRIPTOR_CHECKSUM)
			notEnoughData = this.read_DescriptorChecksum()

		if (this.state === STATES.DATABLOCK_SIZE)
			notEnoughData = this.read_DataBlockSize()

		if (this.state === STATES.DATABLOCK_DATA)
			notEnoughData = this.read_DataBlockData()

		if (this.state === STATES.DATABLOCK_CHECKSUM)
			notEnoughData = this.read_DataBlockChecksum()

		if (this.state === STATES.DATABLOCK_UNCOMPRESS)
			notEnoughData = this.uncompress_DataBlock()

		if (this.state === STATES.EOS)
			notEnoughData = this.read_EOS()
	}

	if (this.pos > pos) {
		this.buffer = this.buffer.slice(this.pos)
		this.pos = 0
	}

	done()
}

module.exports = Decoder

}).call(this,require("buffer").Buffer)
},{"./binding":1,"./static":6,"buffer":"buffer","stream":33,"util":36}],4:[function(require,module,exports){
(function (Buffer){
var Encoder = require('./encoder_stream')

/**
	Encode an LZ4 stream
 */
function LZ4_compress (input, options) {
	var output = []
	var encoder = new Encoder(options)

	encoder.on('data', function (chunk) {
		output.push(chunk)
	})

	encoder.end(input)

	return Buffer.concat(output)
}

exports.LZ4_compress = LZ4_compress

}).call(this,require("buffer").Buffer)
},{"./encoder_stream":5,"buffer":"buffer"}],5:[function(require,module,exports){
(function (Buffer){
var Transform = require('stream').Transform
var inherits = require('util').inherits

var lz4_static = require('./static')
var utils = lz4_static.utils
var lz4_binding = utils.bindings
var lz4_jsbinding = require('./binding')

var STATES = lz4_static.STATES
var SIZES = lz4_static.SIZES

var defaultOptions = {
	blockIndependence: true
,	blockChecksum: false
,	blockMaxSize: 4<<20
,	streamSize: false
,	streamChecksum: true
,	dict: false
,	dictId: 0
,	highCompression: false
}

function Encoder (options) {
	if ( !(this instanceof Encoder) )
		return new Encoder(options)
	
	Transform.call(this, options)

	// Set the options
	var o = options || defaultOptions
	if (o !== defaultOptions)
		Object.keys(defaultOptions).forEach(function (p) {
			if ( !o.hasOwnProperty(p) ) o[p] = defaultOptions[p]
		})

	this.options = o

	this.binding = this.options.useJS ? lz4_jsbinding : lz4_binding
	this.compress = o.highCompression ? this.binding.compressHC : this.binding.compress

	// Build the stream descriptor from the options
	// flags
	var descriptor_flg = 0
	descriptor_flg = descriptor_flg | (lz4_static.VERSION << 6)			// Version
	descriptor_flg = descriptor_flg | ((o.blockIndependence & 1) << 5)	// Block independence
	descriptor_flg = descriptor_flg | ((o.blockChecksum & 1) << 4)		// Block checksum
	descriptor_flg = descriptor_flg | ((o.streamSize & 1) << 3)			// Stream size
	descriptor_flg = descriptor_flg | ((o.streamChecksum & 1) << 2)		// Stream checksum
																		// Reserved bit
	descriptor_flg = descriptor_flg | (o.dict & 1)						// Preset dictionary

	// block maximum size
	var descriptor_bd = lz4_static.blockMaxSizes.indexOf(o.blockMaxSize)
	if (descriptor_bd < 0)
		throw new Error('Invalid blockMaxSize: ' + o.blockMaxSize)

	this.descriptor = { flg: descriptor_flg, bd: (descriptor_bd & 0x7) << 4 }

	// Data being processed
	this.buffer = []
	this.length = 0

	this.first = true
	this.checksum = null
}
inherits(Encoder, Transform)

// Header = magic number + stream descriptor
Encoder.prototype.headerSize = function () {
	var streamSizeSize = this.options.streamSize ? SIZES.DESCRIPTOR : 0
	var dictSize = this.options.dict ? SIZES.DICTID : 0

	return SIZES.MAGIC + 1 + 1 + streamSizeSize + dictSize + 1
}

Encoder.prototype.header = function () {
	var headerSize = this.headerSize()
	var output = new Buffer(headerSize)

	this.state = STATES.MAGIC
	output.writeInt32LE(lz4_static.MAGICNUMBER, 0, true)

	this.state = STATES.DESCRIPTOR
	var descriptor = output.slice(SIZES.MAGIC, output.length - 1)

	// Update the stream descriptor
	descriptor.writeUInt8(this.descriptor.flg, 0, true)
	descriptor.writeUInt8(this.descriptor.bd, 1, true)

	var pos = 2
	this.state = STATES.SIZE
	if (this.options.streamSize) {
		//TODO only 32bits size supported
		descriptor.writeInt32LE(0, pos, true)
		descriptor.writeInt32LE(this.size, pos + 4, true)
		pos += SIZES.SIZE
	}
	this.state = STATES.DICTID
	if (this.options.dict) {
		descriptor.writeInt32LE(this.dictId, pos, true)
		pos += SIZES.DICTID
	}

	this.state = STATES.DESCRIPTOR_CHECKSUM
	output.writeUInt8(
	  utils.descriptorChecksum( descriptor )
	, SIZES.MAGIC + pos, false
	)

	return output
}

Encoder.prototype.update_Checksum = function (data) {
	// Calculate the stream checksum
	this.state = STATES.CHECKSUM_UPDATE
	if (this.options.streamChecksum) {
		this.checksum = utils.streamChecksum(data, this.checksum)
	}
}

Encoder.prototype.compress_DataBlock = function (data) {
	this.state = STATES.DATABLOCK_COMPRESS
	var dbChecksumSize = this.options.blockChecksum ? SIZES.DATABLOCK_CHECKSUM : 0
	var maxBufSize = this.binding.compressBound(data.length)
	var buf = new Buffer( SIZES.DATABLOCK_SIZE + maxBufSize + dbChecksumSize )
	var compressed = buf.slice(SIZES.DATABLOCK_SIZE, SIZES.DATABLOCK_SIZE + maxBufSize)
	var compressedSize = this.compress(data, compressed)

	// Set the block size
	this.state = STATES.DATABLOCK_SIZE
	// Block size shall never be larger than blockMaxSize
	// console.log("blockMaxSize", this.options.blockMaxSize, "compressedSize", compressedSize)
	if (compressedSize > 0 && compressedSize <= this.options.blockMaxSize) {
		// highest bit is 0 (compressed data)
		buf.writeUInt32LE(compressedSize, 0, true)
		buf = buf.slice(0, SIZES.DATABLOCK_SIZE + compressedSize + dbChecksumSize)
	} else {
		// Cannot compress the data, leave it as is
		// highest bit is 1 (uncompressed data)
		buf.writeInt32LE( 0x80000000 | data.length, 0, true)
		buf = buf.slice(0, SIZES.DATABLOCK_SIZE + data.length + dbChecksumSize)
		data.copy(buf, SIZES.DATABLOCK_SIZE);
	}

	// Set the block checksum
	this.state = STATES.DATABLOCK_CHECKSUM
	if (this.options.blockChecksum) {
		// xxHash checksum on undecoded data with a seed of 0
		var checksum = buf.slice(-dbChecksumSize)
		checksum.writeInt32LE( utils.blockChecksum(compressed), 0, true )
	}

	// Update the stream checksum
	this.update_Checksum(data)

	this.size += data.length

	return buf
}

Encoder.prototype._transform = function (data, encoding, done) {
	if (data) {
		// Buffer the incoming data
		this.buffer.push(data)
		this.length += data.length
	}

	// Stream header
	if (this.first) {
		this.push( this.header() )
		this.first = false
	}

	var blockMaxSize = this.options.blockMaxSize
	// Not enough data for a block
	if ( this.length < blockMaxSize ) return done()

	// Build the data to be compressed
	var buf = Buffer.concat(this.buffer, this.length)

	for (var j = 0, i = buf.length; i >= blockMaxSize; i -= blockMaxSize, j += blockMaxSize) {
		// Compress the block
		this.push( this.compress_DataBlock( buf.slice(j, j + blockMaxSize) ) )
	}

	// Set the remaining data
	if (i > 0) {
		this.buffer = [ buf.slice(j) ]
		this.length = this.buffer[0].length
	} else {
		this.buffer = []
		this.length = 0
	}

	done()
}

Encoder.prototype._flush = function (done) {
	if (this.first) {
		this.push( this.header() )
		this.first = false
	}

	if (this.length > 0) {
		var buf = Buffer.concat(this.buffer, this.length)
		this.buffer = []
		this.length = 0
		var cc = this.compress_DataBlock(buf)
		this.push( cc )
	}

	if (this.options.streamChecksum) {
		this.state = STATES.CHECKSUM
		var eos = new Buffer(SIZES.EOS + SIZES.CHECKSUM)
		eos.writeInt32LE( utils.streamChecksum(null, this.checksum), SIZES.EOS, true )
	} else {
		var eos = new Buffer(SIZES.EOS)
	}

	this.state = STATES.EOS
	eos.writeInt32LE(lz4_static.EOS, 0, true)
	this.push(eos)

	done()
}

module.exports = Encoder

}).call(this,require("buffer").Buffer)
},{"./binding":1,"./static":6,"buffer":"buffer","stream":33,"util":36}],6:[function(require,module,exports){
(function (Buffer){
/**
 * LZ4 based compression and decompression
 * Copyright (c) 2014 Pierre Curto
 * MIT Licensed
 */

// LZ4 stream constants
exports.MAGICNUMBER = 0x184D2204
exports.MAGICNUMBER_BUFFER = new Buffer(4)
exports.MAGICNUMBER_BUFFER.writeUInt32LE(exports.MAGICNUMBER, 0, false)

exports.EOS = 0
exports.EOS_BUFFER = new Buffer(4)
exports.EOS_BUFFER.writeUInt32LE(exports.EOS, 0, false)

exports.VERSION = 1

exports.MAGICNUMBER_SKIPPABLE = 0x184D2A50

// n/a, n/a, n/a, n/a, 64KB, 256KB, 1MB, 4MB
exports.blockMaxSizes = [ null, null, null, null, 64<<10, 256<<10, 1<<20, 4<<20 ]

// Compressed file extension
exports.extension = '.lz4'

// Internal stream states
exports.STATES = {
// Compressed stream
	MAGIC: 0
,	DESCRIPTOR: 1
,	SIZE: 2
,	DICTID: 3
,	DESCRIPTOR_CHECKSUM: 4
,	DATABLOCK_SIZE: 5
,	DATABLOCK_DATA: 6
,	DATABLOCK_CHECKSUM: 7
,	DATABLOCK_UNCOMPRESS: 8
,	DATABLOCK_COMPRESS: 9
,	CHECKSUM: 10
,	CHECKSUM_UPDATE: 11
,	EOS: 90
// Skippable chunk
,	SKIP_SIZE: 101
,	SKIP_DATA: 102
}

exports.SIZES = {
	MAGIC: 4
,	DESCRIPTOR: 2
,	SIZE: 8
,	DICTID: 4
,	DESCRIPTOR_CHECKSUM: 1
,	DATABLOCK_SIZE: 4
,	DATABLOCK_CHECKSUM: 4
,	CHECKSUM: 4
,	EOS: 4
,	SKIP_SIZE: 4
}

exports.utils = require('./utils')

}).call(this,require("buffer").Buffer)
},{"./utils":"./utils","buffer":"buffer"}],7:[function(require,module,exports){
exports.UINT32 = require('./lib/uint32')
exports.UINT64 = require('./lib/uint64')
},{"./lib/uint32":8,"./lib/uint64":9}],8:[function(require,module,exports){
/**
	C-like unsigned 32 bits integers in Javascript
	Copyright (C) 2013, Pierre Curto
	MIT license
 */
;(function (root) {

	// Local cache for typical radices
	var radixPowerCache = {
		36: UINT32( Math.pow(36, 5) )
	,	16: UINT32( Math.pow(16, 7) )
	,	10: UINT32( Math.pow(10, 9) )
	,	2:  UINT32( Math.pow(2, 30) )
	}
	var radixCache = {
		36: UINT32(36)
	,	16: UINT32(16)
	,	10: UINT32(10)
	,	2:  UINT32(2)
	}

	/**
	 *	Represents an unsigned 32 bits integer
	 * @constructor
	 * @param {Number|String|Number} low bits     | integer as a string 		 | integer as a number
	 * @param {Number|Number|Undefined} high bits | radix (optional, default=10)
	 * @return 
	 */
	function UINT32 (l, h) {
		if ( !(this instanceof UINT32) )
			return new UINT32(l, h)

		this._low = 0
		this._high = 0
		this.remainder = null
		if (typeof h == 'undefined')
			return fromNumber.call(this, l)

		if (typeof l == 'string')
			return fromString.call(this, l, h)

		fromBits.call(this, l, h)
	}

	/**
	 * Set the current _UINT32_ object with its low and high bits
	 * @method fromBits
	 * @param {Number} low bits
	 * @param {Number} high bits
	 * @return ThisExpression
	 */
	function fromBits (l, h) {
		this._low = l | 0
		this._high = h | 0

		return this
	}
	UINT32.prototype.fromBits = fromBits

	/**
	 * Set the current _UINT32_ object from a number
	 * @method fromNumber
	 * @param {Number} number
	 * @return ThisExpression
	 */
	function fromNumber (value) {
		this._low = value & 0xFFFF
		this._high = value >>> 16

		return this
	}
	UINT32.prototype.fromNumber = fromNumber

	/**
	 * Set the current _UINT32_ object from a string
	 * @method fromString
	 * @param {String} integer as a string
	 * @param {Number} radix (optional, default=10)
	 * @return ThisExpression
	 */
	function fromString (s, radix) {
		var value = parseInt(s, radix || 10)

		this._low = value & 0xFFFF
		this._high = value >>> 16

		return this
	}
	UINT32.prototype.fromString = fromString

	/**
	 * Convert this _UINT32_ to a number
	 * @method toNumber
	 * @return {Number} the converted UINT32
	 */
	UINT32.prototype.toNumber = function () {
		return (this._high << 16) | this._low
	}

	/**
	 * Convert this _UINT32_ to a string
	 * @method toString
	 * @param {Number} radix (optional, default=10)
	 * @return {String} the converted UINT32
	 */
	UINT32.prototype.toString = function (radix) {
		radix = radix || 10
		var radixUint = radixCache[radix] || new UINT32(radix)

		if ( !this.gt(radixUint) ) return this.toNumber().toString(radix)

		var self = this.clone()
		var res = new Array(32)
		for (var i = 31; i >= 0; i--) {
			self.div(radixUint)
			res[i] = self.remainder.toNumber().toString(radix)
			if ( !self.gt(radixUint) ) break
		}
		res[i-1] = self.toNumber().toString(radix)

		return res.join('')
	}

	/**
	 * Add two _UINT32_. The current _UINT32_ stores the result
	 * @method add
	 * @param {Object} other UINT32
	 * @return ThisExpression
	 */
	UINT32.prototype.add = function (other) {
		var a00 = this._low + other._low
		var a16 = a00 >>> 16

		a16 += this._high + other._high

		this._low = a00 & 0xFFFF
		this._high = a16 & 0xFFFF

		return this
	}

	/**
	 * Subtract two _UINT32_. The current _UINT32_ stores the result
	 * @method subtract
	 * @param {Object} other UINT32
	 * @return ThisExpression
	 */
	UINT32.prototype.subtract = function (other) {
		//TODO inline
		return this.add( other.clone().negate() )
	}

	/**
	 * Multiply two _UINT32_. The current _UINT32_ stores the result
	 * @method multiply
	 * @param {Object} other UINT32
	 * @return ThisExpression
	 */
	UINT32.prototype.multiply = function (other) {
		/*
			a = a00 + a16
			b = b00 + b16
			a*b = (a00 + a16)(b00 + b16)
				= a00b00 + a00b16 + a16b00 + a16b16

			a16b16 overflows the 32bits
		 */
		var a16 = this._high
		var a00 = this._low
		var b16 = other._high
		var b00 = other._low

/* Removed to increase speed under normal circumstances (i.e. not multiplying by 0 or 1)
		// this == 0 or other == 1: nothing to do
		if ((a00 == 0 && a16 == 0) || (b00 == 1 && b16 == 0)) return this

		// other == 0 or this == 1: this = other
		if ((b00 == 0 && b16 == 0) || (a00 == 1 && a16 == 0)) {
			this._low = other._low
			this._high = other._high
			return this
		}
*/

		var c16, c00
		c00 = a00 * b00
		c16 = c00 >>> 16

		c16 += a16 * b00
		c16 &= 0xFFFF		// Not required but improves performance
		c16 += a00 * b16

		this._low = c00 & 0xFFFF
		this._high = c16 & 0xFFFF

		return this
	}

	/**
	 * Divide two _UINT32_. The current _UINT32_ stores the result.
	 * The remainder is made available as the _remainder_ property on
	 * the _UINT32_ object. It can be null, meaning there are no remainder.
	 * @method div
	 * @param {Object} other UINT32
	 * @return ThisExpression
	 */
	UINT32.prototype.div = function (other) {
		if ( (other._low == 0) && (other._high == 0) ) throw Error('division by zero')

		// other == 1
		if (other._high == 0 && other._low == 1) {
			this.remainder = new UINT32(0)
			return this
		}

		// other > this: 0
		if ( other.gt(this) ) {
			this.remainder = new UINT32(0)
			this._low = 0
			this._high = 0
			return this
		}
		// other == this: 1
		if ( this.eq(other) ) {
			this.remainder = new UINT32(0)
			this._low = 1
			this._high = 0
			return this
		}

		// Shift the divisor left until it is higher than the dividend
		var _other = other.clone()
		var i = -1
		while ( !this.lt(_other) ) {
			// High bit can overflow the default 16bits
			// Its ok since we right shift after this loop
			// The overflown bit must be kept though
			_other.shiftLeft(1, true)
			i++
		}

		// Set the remainder
		this.remainder = this.clone()
		// Initialize the current result to 0
		this._low = 0
		this._high = 0
		for (; i >= 0; i--) {
			_other.shiftRight(1)
			// If shifted divisor is smaller than the dividend
			// then subtract it from the dividend
			if ( !this.remainder.lt(_other) ) {
				this.remainder.subtract(_other)
				// Update the current result
				if (i >= 16) {
					this._high |= 1 << (i - 16)
				} else {
					this._low |= 1 << i
				}
			}
		}

		return this
	}

	/**
	 * Negate the current _UINT32_
	 * @method negate
	 * @return ThisExpression
	 */
	UINT32.prototype.negate = function () {
		var v = ( ~this._low & 0xFFFF ) + 1
		this._low = v & 0xFFFF
		this._high = (~this._high + (v >>> 16)) & 0xFFFF

		return this
	}

	/**
	 * Equals
	 * @method eq
	 * @param {Object} other UINT32
	 * @return {Boolean}
	 */
	UINT32.prototype.equals = UINT32.prototype.eq = function (other) {
		return (this._low == other._low) && (this._high == other._high)
	}

	/**
	 * Greater than (strict)
	 * @method gt
	 * @param {Object} other UINT32
	 * @return {Boolean}
	 */
	UINT32.prototype.greaterThan = UINT32.prototype.gt = function (other) {
		if (this._high > other._high) return true
		if (this._high < other._high) return false
		return this._low > other._low
	}

	/**
	 * Less than (strict)
	 * @method lt
	 * @param {Object} other UINT32
	 * @return {Boolean}
	 */
	UINT32.prototype.lessThan = UINT32.prototype.lt = function (other) {
		if (this._high < other._high) return true
		if (this._high > other._high) return false
		return this._low < other._low
	}

	/**
	 * Bitwise OR
	 * @method or
	 * @param {Object} other UINT32
	 * @return ThisExpression
	 */
	UINT32.prototype.or = function (other) {
		this._low |= other._low
		this._high |= other._high

		return this
	}

	/**
	 * Bitwise AND
	 * @method and
	 * @param {Object} other UINT32
	 * @return ThisExpression
	 */
	UINT32.prototype.and = function (other) {
		this._low &= other._low
		this._high &= other._high

		return this
	}

	/**
	 * Bitwise NOT
	 * @method not
	 * @return ThisExpression
	 */
	UINT32.prototype.not = function() {
		this._low = ~this._low & 0xFFFF
		this._high = ~this._high & 0xFFFF

		return this
	}

	/**
	 * Bitwise XOR
	 * @method xor
	 * @param {Object} other UINT32
	 * @return ThisExpression
	 */
	UINT32.prototype.xor = function (other) {
		this._low ^= other._low
		this._high ^= other._high

		return this
	}

	/**
	 * Bitwise shift right
	 * @method shiftRight
	 * @param {Number} number of bits to shift
	 * @return ThisExpression
	 */
	UINT32.prototype.shiftRight = UINT32.prototype.shiftr = function (n) {
		if (n > 16) {
			this._low = this._high >> (n - 16)
			this._high = 0
		} else if (n == 16) {
			this._low = this._high
			this._high = 0
		} else {
			this._low = (this._low >> n) | ( (this._high << (16-n)) & 0xFFFF )
			this._high >>= n
		}

		return this
	}

	/**
	 * Bitwise shift left
	 * @method shiftLeft
	 * @param {Number} number of bits to shift
	 * @param {Boolean} allow overflow
	 * @return ThisExpression
	 */
	UINT32.prototype.shiftLeft = UINT32.prototype.shiftl = function (n, allowOverflow) {
		if (n > 16) {
			this._high = this._low << (n - 16)
			this._low = 0
			if (!allowOverflow) {
				this._high &= 0xFFFF
			}
		} else if (n == 16) {
			this._high = this._low
			this._low = 0
		} else {
			this._high = (this._high << n) | (this._low >> (16-n))
			this._low = (this._low << n) & 0xFFFF
			if (!allowOverflow) {
				// Overflow only allowed on the high bits...
				this._high &= 0xFFFF
			}
		}

		return this
	}

	/**
	 * Bitwise rotate left
	 * @method rotl
	 * @param {Number} number of bits to rotate
	 * @return ThisExpression
	 */
	UINT32.prototype.rotateLeft = UINT32.prototype.rotl = function (n) {
		var v = (this._high << 16) | this._low
		v = (v << n) | (v >>> (32 - n))
		this._low = v & 0xFFFF
		this._high = v >>> 16

		return this
	}

	/**
	 * Bitwise rotate right
	 * @method rotr
	 * @param {Number} number of bits to rotate
	 * @return ThisExpression
	 */
	UINT32.prototype.rotateRight = UINT32.prototype.rotr = function (n) {
		var v = (this._high << 16) | this._low
		v = (v >>> n) | (v << (32 - n))
		this._low = v & 0xFFFF
		this._high = v >>> 16

		return this
	}

	/**
	 * Clone the current _UINT32_
	 * @method clone
	 * @return {Object} cloned UINT32
	 */
	UINT32.prototype.clone = function () {
		return new UINT32(this._low, this._high)
	}

	if (typeof define != 'undefined' && define.amd) {
		// AMD / RequireJS
		define([], function () {
			return UINT32
		})
	} else if (typeof module != 'undefined' && module.exports) {
		// Node.js
		module.exports = UINT32
	} else {
		// Browser
		root['UINT32'] = UINT32
	}

})(this)

},{}],9:[function(require,module,exports){
/**
	C-like unsigned 64 bits integers in Javascript
	Copyright (C) 2013, Pierre Curto
	MIT license
 */
;(function (root) {

	// Local cache for typical radices
	var radixPowerCache = {
		16: UINT64( Math.pow(16, 5) )
	,	10: UINT64( Math.pow(10, 5) )
	,	2:  UINT64( Math.pow(2, 5) )
	}
	var radixCache = {
		16: UINT64(16)
	,	10: UINT64(10)
	,	2:  UINT64(2)
	}

	/**
	 *	Represents an unsigned 64 bits integer
	 * @constructor
	 * @param {Number} first low bits (8)
	 * @param {Number} second low bits (8)
	 * @param {Number} first high bits (8)
	 * @param {Number} second high bits (8)
	 * or
	 * @param {Number} low bits (32)
	 * @param {Number} high bits (32)
	 * or
	 * @param {String|Number} integer as a string 		 | integer as a number
	 * @param {Number|Undefined} radix (optional, default=10)
	 * @return 
	 */
	function UINT64 (a00, a16, a32, a48) {
		if ( !(this instanceof UINT64) )
			return new UINT64(a00, a16, a32, a48)

		this.remainder = null
		if (typeof a00 == 'string')
			return fromString.call(this, a00, a16)

		if (typeof a16 == 'undefined')
			return fromNumber.call(this, a00)

		fromBits.apply(this, arguments)
	}

	/**
	 * Set the current _UINT64_ object with its low and high bits
	 * @method fromBits
	 * @param {Number} first low bits (8)
	 * @param {Number} second low bits (8)
	 * @param {Number} first high bits (8)
	 * @param {Number} second high bits (8)
	 * or
	 * @param {Number} low bits (32)
	 * @param {Number} high bits (32)
	 * @return ThisExpression
	 */
	function fromBits (a00, a16, a32, a48) {
		if (typeof a32 == 'undefined') {
			this._a00 = a00 & 0xFFFF
			this._a16 = a00 >>> 16
			this._a32 = a16 & 0xFFFF
			this._a48 = a16 >>> 16
			return this
		}

		this._a00 = a00 | 0
		this._a16 = a16 | 0
		this._a32 = a32 | 0
		this._a48 = a48 | 0

		return this
	}
	UINT64.prototype.fromBits = fromBits

	/**
	 * Set the current _UINT64_ object from a number
	 * @method fromNumber
	 * @param {Number} number
	 * @return ThisExpression
	 */
	function fromNumber (value) {
		this._a00 = value & 0xFFFF
		this._a16 = value >>> 16
		this._a32 = 0
		this._a48 = 0

		return this
	}
	UINT64.prototype.fromNumber = fromNumber

	/**
	 * Set the current _UINT64_ object from a string
	 * @method fromString
	 * @param {String} integer as a string
	 * @param {Number} radix (optional, default=10)
	 * @return ThisExpression
	 */
	function fromString (s, radix) {
		radix = radix || 10

		this._a00 = 0
		this._a16 = 0
		this._a32 = 0
		this._a48 = 0

		/*
			In Javascript, bitwise operators only operate on the first 32 bits 
			of a number, even though parseInt() encodes numbers with a 53 bits 
			mantissa.
			Therefore UINT64(<Number>) can only work on 32 bits.
			The radix maximum value is 36 (as per ECMA specs) (26 letters + 10 digits)
			maximum input value is m = 32bits as 1 = 2^32 - 1
			So the maximum substring length n is:
			36^(n+1) - 1 = 2^32 - 1
			36^(n+1) = 2^32
			(n+1)ln(36) = 32ln(2)
			n = 32ln(2)/ln(36) - 1
			n = 5.189644915687692
			n = 5
		 */
		var radixUint = radixPowerCache[radix] || new UINT64( Math.pow(radix, 5) )

		for (var i = 0, len = s.length; i < len; i += 5) {
			var size = Math.min(5, len - i)
			var value = parseInt( s.slice(i, i + size), radix )
			this.multiply(
					size < 5
						? new UINT64( Math.pow(radix, size) )
						: radixUint
				)
				.add( new UINT64(value) )
		}

		return this
	}
	UINT64.prototype.fromString = fromString

	/**
	 * Convert this _UINT64_ to a number (last 32 bits are dropped)
	 * @method toNumber
	 * @return {Number} the converted UINT64
	 */
	UINT64.prototype.toNumber = function () {
		return (this._a16 << 16) | this._a00
	}

	/**
	 * Convert this _UINT64_ to a string
	 * @method toString
	 * @param {Number} radix (optional, default=10)
	 * @return {String} the converted UINT64
	 */
	UINT64.prototype.toString = function (radix) {
		radix = radix || 10
		var radixUint = radixCache[radix] || new UINT64(radix)

		if ( !this.gt(radixUint) ) return this.toNumber().toString(radix)

		var self = this.clone()
		var res = new Array(64)
		for (var i = 63; i >= 0; i--) {
			self.div(radixUint)
			res[i] = self.remainder.toNumber().toString(radix)
			if ( !self.gt(radixUint) ) break
		}
		res[i-1] = self.toNumber().toString(radix)

		return res.join('')
	}

	/**
	 * Add two _UINT64_. The current _UINT64_ stores the result
	 * @method add
	 * @param {Object} other UINT64
	 * @return ThisExpression
	 */
	UINT64.prototype.add = function (other) {
		var a00 = this._a00 + other._a00

		var a16 = a00 >>> 16
		a16 += this._a16 + other._a16

		var a32 = a16 >>> 16
		a32 += this._a32 + other._a32

		var a48 = a32 >>> 16
		a48 += this._a48 + other._a48

		this._a00 = a00 & 0xFFFF
		this._a16 = a16 & 0xFFFF
		this._a32 = a32 & 0xFFFF
		this._a48 = a48 & 0xFFFF

		return this
	}

	/**
	 * Subtract two _UINT64_. The current _UINT64_ stores the result
	 * @method subtract
	 * @param {Object} other UINT64
	 * @return ThisExpression
	 */
	UINT64.prototype.subtract = function (other) {
		return this.add( other.clone().negate() )
	}

	/**
	 * Multiply two _UINT64_. The current _UINT64_ stores the result
	 * @method multiply
	 * @param {Object} other UINT64
	 * @return ThisExpression
	 */
	UINT64.prototype.multiply = function (other) {
		/*
			a = a00 + a16 + a32 + a48
			b = b00 + b16 + b32 + b48
			a*b = (a00 + a16 + a32 + a48)(b00 + b16 + b32 + b48)
				= a00b00 + a00b16 + a00b32 + a00b48
				+ a16b00 + a16b16 + a16b32 + a16b48
				+ a32b00 + a32b16 + a32b32 + a32b48
				+ a48b00 + a48b16 + a48b32 + a48b48

			a16b48, a32b32, a48b16, a48b32 and a48b48 overflow the 64 bits
			so it comes down to:
			a*b	= a00b00 + a00b16 + a00b32 + a00b48
				+ a16b00 + a16b16 + a16b32
				+ a32b00 + a32b16
				+ a48b00
				= a00b00
				+ a00b16 + a16b00
				+ a00b32 + a16b16 + a32b00
				+ a00b48 + a16b32 + a32b16 + a48b00
		 */
		var a00 = this._a00
		var a16 = this._a16
		var a32 = this._a32
		var a48 = this._a48
		var b00 = other._a00
		var b16 = other._a16
		var b32 = other._a32
		var b48 = other._a48

		var c00 = a00 * b00

		var c16 = c00 >>> 16
		c16 += a00 * b16
		var c32 = c16 >>> 16
		c16 &= 0xFFFF
		c16 += a16 * b00

		c32 += c16 >>> 16
		c32 += a00 * b32
		var c48 = c32 >>> 16
		c32 &= 0xFFFF
		c32 += a16 * b16
		c48 += c32 >>> 16
		c32 &= 0xFFFF
		c32 += a32 * b00

		c48 += c32 >>> 16
		c48 += a00 * b48
		c48 &= 0xFFFF
		c48 += a16 * b32
		c48 &= 0xFFFF
		c48 += a32 * b16
		c48 &= 0xFFFF
		c48 += a48 * b00

		this._a00 = c00 & 0xFFFF
		this._a16 = c16 & 0xFFFF
		this._a32 = c32 & 0xFFFF
		this._a48 = c48 & 0xFFFF

		return this
	}

	/**
	 * Divide two _UINT64_. The current _UINT64_ stores the result.
	 * The remainder is made available as the _remainder_ property on
	 * the _UINT64_ object. It can be null, meaning there are no remainder.
	 * @method div
	 * @param {Object} other UINT64
	 * @return ThisExpression
	 */
	UINT64.prototype.div = function (other) {
		if ( (other._a16 == 0) && (other._a32 == 0) && (other._a48 == 0) ) {
			if (other._a00 == 0) throw Error('division by zero')

			// other == 1: this
			if (other._a00 == 1) {
				this.remainder = new UINT64(0)
				return this
			}
		}

		// other > this: 0
		if ( other.gt(this) ) {
			this.remainder = new UINT64(0)
			this._a00 = 0
			this._a16 = 0
			this._a32 = 0
			this._a48 = 0
			return this
		}
		// other == this: 1
		if ( this.eq(other) ) {
			this.remainder = new UINT64(0)
			this._a00 = 1
			this._a16 = 0
			this._a32 = 0
			this._a48 = 0
			return this
		}

		// Shift the divisor left until it is higher than the dividend
		var _other = other.clone()
		var i = -1
		while ( !this.lt(_other) ) {
			// High bit can overflow the default 16bits
			// Its ok since we right shift after this loop
			// The overflown bit must be kept though
			_other.shiftLeft(1, true)
			i++
		}

		// Set the remainder
		this.remainder = this.clone()
		// Initialize the current result to 0
		this._a00 = 0
		this._a16 = 0
		this._a32 = 0
		this._a48 = 0
		for (; i >= 0; i--) {
			_other.shiftRight(1)
			// If shifted divisor is smaller than the dividend
			// then subtract it from the dividend
			if ( !this.remainder.lt(_other) ) {
				this.remainder.subtract(_other)
				// Update the current result
				if (i >= 48) {
					this._a48 |= 1 << (i - 48)
				} else if (i >= 32) {
					this._a32 |= 1 << (i - 32)
				} else if (i >= 16) {
					this._a16 |= 1 << (i - 16)
				} else {
					this._a00 |= 1 << i
				}
			}
		}

		return this
	}

	/**
	 * Negate the current _UINT64_
	 * @method negate
	 * @return ThisExpression
	 */
	UINT64.prototype.negate = function () {
		var v = ( ~this._a00 & 0xFFFF ) + 1
		this._a00 = v & 0xFFFF
		v = (~this._a16 & 0xFFFF) + (v >>> 16)
		this._a16 = v & 0xFFFF
		v = (~this._a32 & 0xFFFF) + (v >>> 16)
		this._a32 = v & 0xFFFF
		this._a48 = (~this._a48 + (v >>> 16)) & 0xFFFF

		return this
	}

	/**

	 * @method eq
	 * @param {Object} other UINT64
	 * @return {Boolean}
	 */
	UINT64.prototype.equals = UINT64.prototype.eq = function (other) {
		return (this._a48 == other._a48) && (this._a00 == other._a00)
			 && (this._a32 == other._a32) && (this._a16 == other._a16)
	}

	/**
	 * Greater than (strict)
	 * @method gt
	 * @param {Object} other UINT64
	 * @return {Boolean}
	 */
	UINT64.prototype.greaterThan = UINT64.prototype.gt = function (other) {
		if (this._a48 > other._a48) return true
		if (this._a48 < other._a48) return false
		if (this._a32 > other._a32) return true
		if (this._a32 < other._a32) return false
		if (this._a16 > other._a16) return true
		if (this._a16 < other._a16) return false
		return this._a00 > other._a00
	}

	/**
	 * Less than (strict)
	 * @method lt
	 * @param {Object} other UINT64
	 * @return {Boolean}
	 */
	UINT64.prototype.lessThan = UINT64.prototype.lt = function (other) {
		if (this._a48 < other._a48) return true
		if (this._a48 > other._a48) return false
		if (this._a32 < other._a32) return true
		if (this._a32 > other._a32) return false
		if (this._a16 < other._a16) return true
		if (this._a16 > other._a16) return false
		return this._a00 < other._a00
	}

	/**
	 * Bitwise OR
	 * @method or
	 * @param {Object} other UINT64
	 * @return ThisExpression
	 */
	UINT64.prototype.or = function (other) {
		this._a00 |= other._a00
		this._a16 |= other._a16
		this._a32 |= other._a32
		this._a48 |= other._a48

		return this
	}

	/**
	 * Bitwise AND
	 * @method and
	 * @param {Object} other UINT64
	 * @return ThisExpression
	 */
	UINT64.prototype.and = function (other) {
		this._a00 &= other._a00
		this._a16 &= other._a16
		this._a32 &= other._a32
		this._a48 &= other._a48

		return this
	}

	/**
	 * Bitwise XOR
	 * @method xor
	 * @param {Object} other UINT64
	 * @return ThisExpression
	 */
	UINT64.prototype.xor = function (other) {
		this._a00 ^= other._a00
		this._a16 ^= other._a16
		this._a32 ^= other._a32
		this._a48 ^= other._a48

		return this
	}

	/**
	 * Bitwise NOT
	 * @method not
	 * @return ThisExpression
	 */
	UINT64.prototype.not = function() {
		this._a00 = ~this._a00 & 0xFFFF
		this._a16 = ~this._a16 & 0xFFFF
		this._a32 = ~this._a32 & 0xFFFF
		this._a48 = ~this._a48 & 0xFFFF

		return this
	}

	/**
	 * Bitwise shift right
	 * @method shiftRight
	 * @param {Number} number of bits to shift
	 * @return ThisExpression
	 */
	UINT64.prototype.shiftRight = UINT64.prototype.shiftr = function (n) {
		n %= 64
		if (n >= 48) {
			this._a00 = this._a48 >> (n - 48)
			this._a16 = 0
			this._a32 = 0
			this._a48 = 0
		} else if (n >= 32) {
			n -= 32
			this._a00 = ( (this._a32 >> n) | (this._a48 << (16-n)) ) & 0xFFFF
			this._a16 = (this._a48 >> n) & 0xFFFF
			this._a32 = 0
			this._a48 = 0
		} else if (n >= 16) {
			n -= 16
			this._a00 = ( (this._a16 >> n) | (this._a32 << (16-n)) ) & 0xFFFF
			this._a16 = ( (this._a32 >> n) | (this._a48 << (16-n)) ) & 0xFFFF
			this._a32 = (this._a48 >> n) & 0xFFFF
			this._a48 = 0
		} else {
			this._a00 = ( (this._a00 >> n) | (this._a16 << (16-n)) ) & 0xFFFF
			this._a16 = ( (this._a16 >> n) | (this._a32 << (16-n)) ) & 0xFFFF
			this._a32 = ( (this._a32 >> n) | (this._a48 << (16-n)) ) & 0xFFFF
			this._a48 = (this._a48 >> n) & 0xFFFF
		}

		return this
	}

	/**
	 * Bitwise shift left
	 * @method shiftLeft
	 * @param {Number} number of bits to shift
	 * @param {Boolean} allow overflow
	 * @return ThisExpression
	 */
	UINT64.prototype.shiftLeft = UINT64.prototype.shiftl = function (n, allowOverflow) {
		n %= 64
		if (n >= 48) {
			this._a48 = this._a00 << (n - 48)
			this._a32 = 0
			this._a16 = 0
			this._a00 = 0
		} else if (n >= 32) {
			n -= 32
			this._a48 = (this._a16 << n) | (this._a00 >> (16-n))
			this._a32 = (this._a00 << n) & 0xFFFF
			this._a16 = 0
			this._a00 = 0
		} else if (n >= 16) {
			n -= 16
			this._a48 = (this._a32 << n) | (this._a16 >> (16-n))
			this._a32 = ( (this._a16 << n) | (this._a00 >> (16-n)) ) & 0xFFFF
			this._a16 = (this._a00 << n) & 0xFFFF
			this._a00 = 0
		} else {
			this._a48 = (this._a48 << n) | (this._a32 >> (16-n))
			this._a32 = ( (this._a32 << n) | (this._a16 >> (16-n)) ) & 0xFFFF
			this._a16 = ( (this._a16 << n) | (this._a00 >> (16-n)) ) & 0xFFFF
			this._a00 = (this._a00 << n) & 0xFFFF
		}
		if (!allowOverflow) {
			this._a48 &= 0xFFFF
		}

		return this
	}

	/**
	 * Bitwise rotate left
	 * @method rotl
	 * @param {Number} number of bits to rotate
	 * @return ThisExpression
	 */
	UINT64.prototype.rotateLeft = UINT64.prototype.rotl = function (n) {
		n %= 64
		if (n == 0) return this
		if (n >= 32) {
			// A.B.C.D
			// B.C.D.A rotl(16)
			// C.D.A.B rotl(32)
			var v = this._a00
			this._a00 = this._a32
			this._a32 = v
			v = this._a48
			this._a48 = this._a16
			this._a16 = v
			if (n == 32) return this
			n -= 32
		}

		var high = (this._a48 << 16) | this._a32
		var low = (this._a16 << 16) | this._a00

		var _high = (high << n) | (low >>> (32 - n))
		var _low = (low << n) | (high >>> (32 - n))

		this._a00 = _low & 0xFFFF
		this._a16 = _low >>> 16
		this._a32 = _high & 0xFFFF
		this._a48 = _high >>> 16

		return this
	}

	/**
	 * Bitwise rotate right
	 * @method rotr
	 * @param {Number} number of bits to rotate
	 * @return ThisExpression
	 */
	UINT64.prototype.rotateRight = UINT64.prototype.rotr = function (n) {
		n %= 64
		if (n == 0) return this
		if (n >= 32) {
			// A.B.C.D
			// D.A.B.C rotr(16)
			// C.D.A.B rotr(32)
			var v = this._a00
			this._a00 = this._a32
			this._a32 = v
			v = this._a48
			this._a48 = this._a16
			this._a16 = v
			if (n == 32) return this
			n -= 32
		}

		var high = (this._a48 << 16) | this._a32
		var low = (this._a16 << 16) | this._a00

		var _high = (high >>> n) | (low << (32 - n))
		var _low = (low >>> n) | (high << (32 - n))

		this._a00 = _low & 0xFFFF
		this._a16 = _low >>> 16
		this._a32 = _high & 0xFFFF
		this._a48 = _high >>> 16

		return this
	}

	/**
	 * Clone the current _UINT64_
	 * @method clone
	 * @return {Object} cloned UINT64
	 */
	UINT64.prototype.clone = function () {
		return new UINT64(this._a00, this._a16, this._a32, this._a48)
	}

	if (typeof define != 'undefined' && define.amd) {
		// AMD / RequireJS
		define([], function () {
			return UINT64
		})
	} else if (typeof module != 'undefined' && module.exports) {
		// Node.js
		module.exports = UINT64
	} else {
		// Browser
		root['UINT64'] = UINT64
	}

})(this)

},{}],10:[function(require,module,exports){
(function (Buffer){
/**
	xxHash implementation in pure Javascript

	Copyright (C) 2013, Pierre Curto
	MIT license
 */
;(function (root) {

	var UINT32 = require('cuint').UINT32

	/*
		Merged this sequence of method calls as it speeds up
		the calculations by a factor of 2
	 */
	// this.v1.add( other.multiply(PRIME32_2) ).rotl(13).multiply(PRIME32_1);
	UINT32.prototype.xxh_update = function (low, high) {
		var b00 = PRIME32_2._low
		var b16 = PRIME32_2._high

		var c16, c00
		c00 = low * b00
		c16 = c00 >>> 16

		c16 += high * b00
		c16 &= 0xFFFF		// Not required but improves performance
		c16 += low * b16

		var a00 = this._low + (c00 & 0xFFFF)
		var a16 = a00 >>> 16

		a16 += this._high + (c16 & 0xFFFF)

		var v = (a16 << 16) | (a00 & 0xFFFF)
		v = (v << 13) | (v >>> 19)

		a00 = v & 0xFFFF
		a16 = v >>> 16

		b00 = PRIME32_1._low
		b16 = PRIME32_1._high

		c00 = a00 * b00
		c16 = c00 >>> 16

		c16 += a16 * b00
		c16 &= 0xFFFF		// Not required but improves performance
		c16 += a00 * b16

		this._low = c00 & 0xFFFF
		this._high = c16 & 0xFFFF
	}

	/*
	 * Constants
	 */
	var PRIME32_1 = UINT32( '2654435761' )
	var PRIME32_2 = UINT32( '2246822519' )
	var PRIME32_3 = UINT32( '3266489917' )
	var PRIME32_4 = UINT32(  '668265263' )
	var PRIME32_5 = UINT32(  '374761393' )

	var PRIME32_1plus2 = PRIME32_1.clone().add(PRIME32_2)

	/**
	* Convert string to proper UTF-8 array
	* @param str Input string
	* @returns {Uint8Array} UTF8 array is returned as uint8 array
	*/
	function toUTF8Array (str) {
		var utf8 = []
		for (var i=0, n=str.length; i < n; i++) {
			var charcode = str.charCodeAt(i)
			if (charcode < 0x80) utf8.push(charcode)
			else if (charcode < 0x800) {
				utf8.push(0xc0 | (charcode >> 6),
				0x80 | (charcode & 0x3f))
			}
			else if (charcode < 0xd800 || charcode >= 0xe000) {
				utf8.push(0xe0 | (charcode >> 12),
				0x80 | ((charcode>>6) & 0x3f),
				0x80 | (charcode & 0x3f))
			}
			// surrogate pair
			else {
				i++;
				// UTF-16 encodes 0x10000-0x10FFFF by
				// subtracting 0x10000 and splitting the
				// 20 bits of 0x0-0xFFFFF into two halves
				charcode = 0x10000 + (((charcode & 0x3ff)<<10)
				| (str.charCodeAt(i) & 0x3ff))
				utf8.push(0xf0 | (charcode >>18),
				0x80 | ((charcode>>12) & 0x3f),
				0x80 | ((charcode>>6) & 0x3f),
				0x80 | (charcode & 0x3f))
			}
		}

		return new Uint8Array(utf8)
	}

	/**
	 * XXH object used as a constructor or a function
	 * @constructor
	 * or
	 * @param {Object|String} input data
	 * @param {Number|UINT32} seed
	 * @return ThisExpression
	 * or
	 * @return {UINT32} xxHash
	 */
	function XXH () {
		if (arguments.length == 2)
			return new XXH( arguments[1] ).update( arguments[0] ).digest()

		if (!(this instanceof XXH))
			return new XXH( arguments[0] )

		init.call(this, arguments[0])
	}

	/**
	 * Initialize the XXH instance with the given seed
	 * @method init
	 * @param {Number|Object} seed as a number or an unsigned 32 bits integer
	 * @return ThisExpression
	 */
	 function init (seed) {
		this.seed = seed instanceof UINT32 ? seed.clone() : UINT32(seed)
		this.v1 = this.seed.clone().add(PRIME32_1plus2)
		this.v2 = this.seed.clone().add(PRIME32_2)
		this.v3 = this.seed.clone()
		this.v4 = this.seed.clone().subtract(PRIME32_1)
		this.total_len = 0
		this.memsize = 0
		this.memory = null

		return this
	}
	XXH.prototype.init = init

	/**
	 * Add data to be computed for the XXH hash
	 * @method update
	 * @param {String|Buffer|ArrayBuffer} input as a string or nodejs Buffer or ArrayBuffer
	 * @return ThisExpression
	 */
	XXH.prototype.update = function (input) {
		var isString = typeof input == 'string'
		var isArrayBuffer

		// Convert all strings to utf-8 first (issue #5)
		if (isString) {
			input = toUTF8Array(input)
			isString = false
			isArrayBuffer = true
		}

		if (typeof ArrayBuffer !== "undefined" && input instanceof ArrayBuffer)
		{
			isArrayBuffer = true
			input = new Uint8Array(input);
		}

		var p = 0
		var len = input.length
		var bEnd = p + len

		if (len == 0) return this

		this.total_len += len

		if (this.memsize == 0)
		{
			if (isString) {
				this.memory = ''
			} else if (isArrayBuffer) {
				this.memory = new Uint8Array(16)
			} else {
				this.memory = new Buffer(16)
			}
		}

		if (this.memsize + len < 16)   // fill in tmp buffer
		{
			// XXH_memcpy(this.memory + this.memsize, input, len)
			if (isString) {
				this.memory += input
			} else if (isArrayBuffer) {
				this.memory.set( input.subarray(0, len), this.memsize )
			} else {
				input.copy( this.memory, this.memsize, 0, len )
			}

			this.memsize += len
			return this
		}

		if (this.memsize > 0)   // some data left from previous update
		{
			// XXH_memcpy(this.memory + this.memsize, input, 16-this.memsize);
			if (isString) {
				this.memory += input.slice(0, 16 - this.memsize)
			} else if (isArrayBuffer) {
				this.memory.set( input.subarray(0, 16 - this.memsize), this.memsize )
			} else {
				input.copy( this.memory, this.memsize, 0, 16 - this.memsize )
			}

			var p32 = 0
			if (isString) {
				this.v1.xxh_update(
					(this.memory.charCodeAt(p32+1) << 8) | this.memory.charCodeAt(p32)
				,	(this.memory.charCodeAt(p32+3) << 8) | this.memory.charCodeAt(p32+2)
				)
				p32 += 4
				this.v2.xxh_update(
					(this.memory.charCodeAt(p32+1) << 8) | this.memory.charCodeAt(p32)
				,	(this.memory.charCodeAt(p32+3) << 8) | this.memory.charCodeAt(p32+2)
				)
				p32 += 4
				this.v3.xxh_update(
					(this.memory.charCodeAt(p32+1) << 8) | this.memory.charCodeAt(p32)
				,	(this.memory.charCodeAt(p32+3) << 8) | this.memory.charCodeAt(p32+2)
				)
				p32 += 4
				this.v4.xxh_update(
					(this.memory.charCodeAt(p32+1) << 8) | this.memory.charCodeAt(p32)
				,	(this.memory.charCodeAt(p32+3) << 8) | this.memory.charCodeAt(p32+2)
				)
			} else {
				this.v1.xxh_update(
					(this.memory[p32+1] << 8) | this.memory[p32]
				,	(this.memory[p32+3] << 8) | this.memory[p32+2]
				)
				p32 += 4
				this.v2.xxh_update(
					(this.memory[p32+1] << 8) | this.memory[p32]
				,	(this.memory[p32+3] << 8) | this.memory[p32+2]
				)
				p32 += 4
				this.v3.xxh_update(
					(this.memory[p32+1] << 8) | this.memory[p32]
				,	(this.memory[p32+3] << 8) | this.memory[p32+2]
				)
				p32 += 4
				this.v4.xxh_update(
					(this.memory[p32+1] << 8) | this.memory[p32]
				,	(this.memory[p32+3] << 8) | this.memory[p32+2]
				)
			}

			p += 16 - this.memsize
			this.memsize = 0
			if (isString) this.memory = ''
		}

		if (p <= bEnd - 16)
		{
			var limit = bEnd - 16

			do
			{
				if (isString) {
					this.v1.xxh_update(
						(input.charCodeAt(p+1) << 8) | input.charCodeAt(p)
					,	(input.charCodeAt(p+3) << 8) | input.charCodeAt(p+2)
					)
					p += 4
					this.v2.xxh_update(
						(input.charCodeAt(p+1) << 8) | input.charCodeAt(p)
					,	(input.charCodeAt(p+3) << 8) | input.charCodeAt(p+2)
					)
					p += 4
					this.v3.xxh_update(
						(input.charCodeAt(p+1) << 8) | input.charCodeAt(p)
					,	(input.charCodeAt(p+3) << 8) | input.charCodeAt(p+2)
					)
					p += 4
					this.v4.xxh_update(
						(input.charCodeAt(p+1) << 8) | input.charCodeAt(p)
					,	(input.charCodeAt(p+3) << 8) | input.charCodeAt(p+2)
					)
				} else {
					this.v1.xxh_update(
						(input[p+1] << 8) | input[p]
					,	(input[p+3] << 8) | input[p+2]
					)
					p += 4
					this.v2.xxh_update(
						(input[p+1] << 8) | input[p]
					,	(input[p+3] << 8) | input[p+2]
					)
					p += 4
					this.v3.xxh_update(
						(input[p+1] << 8) | input[p]
					,	(input[p+3] << 8) | input[p+2]
					)
					p += 4
					this.v4.xxh_update(
						(input[p+1] << 8) | input[p]
					,	(input[p+3] << 8) | input[p+2]
					)
				}
				p += 4
			} while (p <= limit)
		}

		if (p < bEnd)
		{
			// XXH_memcpy(this.memory, p, bEnd-p);
			if (isString) {
				this.memory += input.slice(p)
			} else if (isArrayBuffer) {
				this.memory.set( input.subarray(p, bEnd), this.memsize )
			} else {
				input.copy( this.memory, this.memsize, p, bEnd )
			}

			this.memsize = bEnd - p
		}

		return this
	}

	/**
	 * Finalize the XXH computation. The XXH instance is ready for reuse for the given seed
	 * @method digest
	 * @return {UINT32} xxHash
	 */
	XXH.prototype.digest = function () {
		var input = this.memory
		var isString = typeof input == 'string'
		var p = 0
		var bEnd = this.memsize
		var h32, h
		var u = new UINT32

		if (this.total_len >= 16)
		{
			h32 = this.v1.rotl(1).add( this.v2.rotl(7).add( this.v3.rotl(12).add( this.v4.rotl(18) ) ) )
		}
		else
		{
			h32  = this.seed.add( PRIME32_5 )
		}

		h32.add( u.fromNumber(this.total_len) )

		while (p <= bEnd - 4)
		{
			if (isString) {
				u.fromBits(
					(input.charCodeAt(p+1) << 8) | input.charCodeAt(p)
				,	(input.charCodeAt(p+3) << 8) | input.charCodeAt(p+2)
				)
			} else {
				u.fromBits(
					(input[p+1] << 8) | input[p]
				,	(input[p+3] << 8) | input[p+2]
				)
			}
			h32
				.add( u.multiply(PRIME32_3) )
				.rotl(17)
				.multiply( PRIME32_4 )
			p += 4
		}

		while (p < bEnd)
		{
			u.fromBits( isString ? input.charCodeAt(p++) : input[p++], 0 )
			h32
				.add( u.multiply(PRIME32_5) )
				.rotl(11)
				.multiply(PRIME32_1)
		}

		h = h32.clone().shiftRight(15)
		h32.xor(h).multiply(PRIME32_2)

		h = h32.clone().shiftRight(13)
		h32.xor(h).multiply(PRIME32_3)

		h = h32.clone().shiftRight(16)
		h32.xor(h)

		// Reset the state
		this.init( this.seed )

		return h32
	}

	if (typeof define != 'undefined' && define.amd) {
		// AMD / RequireJS
		define([], function () {
			return XXH
		})
	} else if (typeof module != 'undefined' && module.exports) {
		// Node.js
		module.exports = XXH
	} else {
		// Browser
		root['XXH'] = XXH
	}

})(this)

}).call(this,require("buffer").Buffer)
},{"buffer":"buffer","cuint":7}],11:[function(require,module,exports){

},{}],12:[function(require,module,exports){
var lookup = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';

;(function (exports) {
	'use strict';

  var Arr = (typeof Uint8Array !== 'undefined')
    ? Uint8Array
    : Array

	var PLUS   = '+'.charCodeAt(0)
	var SLASH  = '/'.charCodeAt(0)
	var NUMBER = '0'.charCodeAt(0)
	var LOWER  = 'a'.charCodeAt(0)
	var UPPER  = 'A'.charCodeAt(0)
	var PLUS_URL_SAFE = '-'.charCodeAt(0)
	var SLASH_URL_SAFE = '_'.charCodeAt(0)

	function decode (elt) {
		var code = elt.charCodeAt(0)
		if (code === PLUS ||
		    code === PLUS_URL_SAFE)
			return 62 // '+'
		if (code === SLASH ||
		    code === SLASH_URL_SAFE)
			return 63 // '/'
		if (code < NUMBER)
			return -1 //no match
		if (code < NUMBER + 10)
			return code - NUMBER + 26 + 26
		if (code < UPPER + 26)
			return code - UPPER
		if (code < LOWER + 26)
			return code - LOWER + 26
	}

	function b64ToByteArray (b64) {
		var i, j, l, tmp, placeHolders, arr

		if (b64.length % 4 > 0) {
			throw new Error('Invalid string. Length must be a multiple of 4')
		}

		// the number of equal signs (place holders)
		// if there are two placeholders, than the two characters before it
		// represent one byte
		// if there is only one, then the three characters before it represent 2 bytes
		// this is just a cheap hack to not do indexOf twice
		var len = b64.length
		placeHolders = '=' === b64.charAt(len - 2) ? 2 : '=' === b64.charAt(len - 1) ? 1 : 0

		// base64 is 4/3 + up to two characters of the original data
		arr = new Arr(b64.length * 3 / 4 - placeHolders)

		// if there are placeholders, only get up to the last complete 4 chars
		l = placeHolders > 0 ? b64.length - 4 : b64.length

		var L = 0

		function push (v) {
			arr[L++] = v
		}

		for (i = 0, j = 0; i < l; i += 4, j += 3) {
			tmp = (decode(b64.charAt(i)) << 18) | (decode(b64.charAt(i + 1)) << 12) | (decode(b64.charAt(i + 2)) << 6) | decode(b64.charAt(i + 3))
			push((tmp & 0xFF0000) >> 16)
			push((tmp & 0xFF00) >> 8)
			push(tmp & 0xFF)
		}

		if (placeHolders === 2) {
			tmp = (decode(b64.charAt(i)) << 2) | (decode(b64.charAt(i + 1)) >> 4)
			push(tmp & 0xFF)
		} else if (placeHolders === 1) {
			tmp = (decode(b64.charAt(i)) << 10) | (decode(b64.charAt(i + 1)) << 4) | (decode(b64.charAt(i + 2)) >> 2)
			push((tmp >> 8) & 0xFF)
			push(tmp & 0xFF)
		}

		return arr
	}

	function uint8ToBase64 (uint8) {
		var i,
			extraBytes = uint8.length % 3, // if we have 1 byte left, pad 2 bytes
			output = "",
			temp, length

		function encode (num) {
			return lookup.charAt(num)
		}

		function tripletToBase64 (num) {
			return encode(num >> 18 & 0x3F) + encode(num >> 12 & 0x3F) + encode(num >> 6 & 0x3F) + encode(num & 0x3F)
		}

		// go through the array every three bytes, we'll deal with trailing stuff later
		for (i = 0, length = uint8.length - extraBytes; i < length; i += 3) {
			temp = (uint8[i] << 16) + (uint8[i + 1] << 8) + (uint8[i + 2])
			output += tripletToBase64(temp)
		}

		// pad the end with zeros, but make sure to not forget the extra bytes
		switch (extraBytes) {
			case 1:
				temp = uint8[uint8.length - 1]
				output += encode(temp >> 2)
				output += encode((temp << 4) & 0x3F)
				output += '=='
				break
			case 2:
				temp = (uint8[uint8.length - 2] << 8) + (uint8[uint8.length - 1])
				output += encode(temp >> 10)
				output += encode((temp >> 4) & 0x3F)
				output += encode((temp << 2) & 0x3F)
				output += '='
				break
		}

		return output
	}

	exports.toByteArray = b64ToByteArray
	exports.fromByteArray = uint8ToBase64
}(typeof exports === 'undefined' ? (this.base64js = {}) : exports))

},{}],13:[function(require,module,exports){
exports.read = function (buffer, offset, isLE, mLen, nBytes) {
  var e, m
  var eLen = nBytes * 8 - mLen - 1
  var eMax = (1 << eLen) - 1
  var eBias = eMax >> 1
  var nBits = -7
  var i = isLE ? (nBytes - 1) : 0
  var d = isLE ? -1 : 1
  var s = buffer[offset + i]

  i += d

  e = s & ((1 << (-nBits)) - 1)
  s >>= (-nBits)
  nBits += eLen
  for (; nBits > 0; e = e * 256 + buffer[offset + i], i += d, nBits -= 8) {}

  m = e & ((1 << (-nBits)) - 1)
  e >>= (-nBits)
  nBits += mLen
  for (; nBits > 0; m = m * 256 + buffer[offset + i], i += d, nBits -= 8) {}

  if (e === 0) {
    e = 1 - eBias
  } else if (e === eMax) {
    return m ? NaN : ((s ? -1 : 1) * Infinity)
  } else {
    m = m + Math.pow(2, mLen)
    e = e - eBias
  }
  return (s ? -1 : 1) * m * Math.pow(2, e - mLen)
}

exports.write = function (buffer, value, offset, isLE, mLen, nBytes) {
  var e, m, c
  var eLen = nBytes * 8 - mLen - 1
  var eMax = (1 << eLen) - 1
  var eBias = eMax >> 1
  var rt = (mLen === 23 ? Math.pow(2, -24) - Math.pow(2, -77) : 0)
  var i = isLE ? 0 : (nBytes - 1)
  var d = isLE ? 1 : -1
  var s = value < 0 || (value === 0 && 1 / value < 0) ? 1 : 0

  value = Math.abs(value)

  if (isNaN(value) || value === Infinity) {
    m = isNaN(value) ? 1 : 0
    e = eMax
  } else {
    e = Math.floor(Math.log(value) / Math.LN2)
    if (value * (c = Math.pow(2, -e)) < 1) {
      e--
      c *= 2
    }
    if (e + eBias >= 1) {
      value += rt / c
    } else {
      value += rt * Math.pow(2, 1 - eBias)
    }
    if (value * c >= 2) {
      e++
      c /= 2
    }

    if (e + eBias >= eMax) {
      m = 0
      e = eMax
    } else if (e + eBias >= 1) {
      m = (value * c - 1) * Math.pow(2, mLen)
      e = e + eBias
    } else {
      m = value * Math.pow(2, eBias - 1) * Math.pow(2, mLen)
      e = 0
    }
  }

  for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) {}

  e = (e << mLen) | m
  eLen += mLen
  for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) {}

  buffer[offset + i - d] |= s * 128
}

},{}],14:[function(require,module,exports){

/**
 * isArray
 */

var isArray = Array.isArray;

/**
 * toString
 */

var str = Object.prototype.toString;

/**
 * Whether or not the given `val`
 * is an array.
 *
 * example:
 *
 *        isArray([]);
 *        // > true
 *        isArray(arguments);
 *        // > false
 *        isArray('');
 *        // > false
 *
 * @param {mixed} val
 * @return {bool}
 */

module.exports = isArray || function (val) {
  return !! val && '[object Array]' == str.call(val);
};

},{}],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.

function EventEmitter() {
  this._events = this._events || {};
  this._maxListeners = this._maxListeners || undefined;
}
module.exports = EventEmitter;

// Backwards-compat with node 0.10.x
EventEmitter.EventEmitter = EventEmitter;

EventEmitter.prototype._events = undefined;
EventEmitter.prototype._maxListeners = undefined;

// By default EventEmitters will print a warning if more than 10 listeners are
// added to it. This is a useful default which helps finding memory leaks.
EventEmitter.defaultMaxListeners = 10;

// Obviously not all Emitters should be limited to 10. This function allows
// that to be increased. Set to zero for unlimited.
EventEmitter.prototype.setMaxListeners = function(n) {
  if (!isNumber(n) || n < 0 || isNaN(n))
    throw TypeError('n must be a positive number');
  this._maxListeners = n;
  return this;
};

EventEmitter.prototype.emit = function(type) {
  var er, handler, len, args, i, listeners;

  if (!this._events)
    this._events = {};

  // If there is no 'error' event listener then throw.
  if (type === 'error') {
    if (!this._events.error ||
        (isObject(this._events.error) && !this._events.error.length)) {
      er = arguments[1];
      if (er instanceof Error) {
        throw er; // Unhandled 'error' event
      }
      throw TypeError('Uncaught, unspecified "error" event.');
    }
  }

  handler = this._events[type];

  if (isUndefined(handler))
    return false;

  if (isFunction(handler)) {
    switch (arguments.length) {
      // fast cases
      case 1:
        handler.call(this);
        break;
      case 2:
        handler.call(this, arguments[1]);
        break;
      case 3:
        handler.call(this, arguments[1], arguments[2]);
        break;
      // slower
      default:
        args = Array.prototype.slice.call(arguments, 1);
        handler.apply(this, args);
    }
  } else if (isObject(handler)) {
    args = Array.prototype.slice.call(arguments, 1);
    listeners = handler.slice();
    len = listeners.length;
    for (i = 0; i < len; i++)
      listeners[i].apply(this, args);
  }

  return true;
};

EventEmitter.prototype.addListener = function(type, listener) {
  var m;

  if (!isFunction(listener))
    throw TypeError('listener must be a function');

  if (!this._events)
    this._events = {};

  // To avoid recursion in the case that type === "newListener"! Before
  // adding it to the listeners, first emit "newListener".
  if (this._events.newListener)
    this.emit('newListener', type,
              isFunction(listener.listener) ?
              listener.listener : listener);

  if (!this._events[type])
    // Optimize the case of one listener. Don't need the extra array object.
    this._events[type] = listener;
  else if (isObject(this._events[type]))
    // If we've already got an array, just append.
    this._events[type].push(listener);
  else
    // Adding the second element, need to change to array.
    this._events[type] = [this._events[type], listener];

  // Check for listener leak
  if (isObject(this._events[type]) && !this._events[type].warned) {
    if (!isUndefined(this._maxListeners)) {
      m = this._maxListeners;
    } else {
      m = EventEmitter.defaultMaxListeners;
    }

    if (m && m > 0 && this._events[type].length > m) {
      this._events[type].warned = true;
      console.error('(node) warning: possible EventEmitter memory ' +
                    'leak detected. %d listeners added. ' +
                    'Use emitter.setMaxListeners() to increase limit.',
                    this._events[type].length);
      if (typeof console.trace === 'function') {
        // not supported in IE 10
        console.trace();
      }
    }
  }

  return this;
};

EventEmitter.prototype.on = EventEmitter.prototype.addListener;

EventEmitter.prototype.once = function(type, listener) {
  if (!isFunction(listener))
    throw TypeError('listener must be a function');

  var fired = false;

  function g() {
    this.removeListener(type, g);

    if (!fired) {
      fired = true;
      listener.apply(this, arguments);
    }
  }

  g.listener = listener;
  this.on(type, g);

  return this;
};

// emits a 'removeListener' event iff the listener was removed
EventEmitter.prototype.removeListener = function(type, listener) {
  var list, position, length, i;

  if (!isFunction(listener))
    throw TypeError('listener must be a function');

  if (!this._events || !this._events[type])
    return this;

  list = this._events[type];
  length = list.length;
  position = -1;

  if (list === listener ||
      (isFunction(list.listener) && list.listener === listener)) {
    delete this._events[type];
    if (this._events.removeListener)
      this.emit('removeListener', type, listener);

  } else if (isObject(list)) {
    for (i = length; i-- > 0;) {
      if (list[i] === listener ||
          (list[i].listener && list[i].listener === listener)) {
        position = i;
        break;
      }
    }

    if (position < 0)
      return this;

    if (list.length === 1) {
      list.length = 0;
      delete this._events[type];
    } else {
      list.splice(position, 1);
    }

    if (this._events.removeListener)
      this.emit('removeListener', type, listener);
  }

  return this;
};

EventEmitter.prototype.removeAllListeners = function(type) {
  var key, listeners;

  if (!this._events)
    return this;

  // not listening for removeListener, no need to emit
  if (!this._events.removeListener) {
    if (arguments.length === 0)
      this._events = {};
    else if (this._events[type])
      delete this._events[type];
    return this;
  }

  // emit removeListener for all listeners on all events
  if (arguments.length === 0) {
    for (key in this._events) {
      if (key === 'removeListener') continue;
      this.removeAllListeners(key);
    }
    this.removeAllListeners('removeListener');
    this._events = {};
    return this;
  }

  listeners = this._events[type];

  if (isFunction(listeners)) {
    this.removeListener(type, listeners);
  } else if (listeners) {
    // LIFO order
    while (listeners.length)
      this.removeListener(type, listeners[listeners.length - 1]);
  }
  delete this._events[type];

  return this;
};

EventEmitter.prototype.listeners = function(type) {
  var ret;
  if (!this._events || !this._events[type])
    ret = [];
  else if (isFunction(this._events[type]))
    ret = [this._events[type]];
  else
    ret = this._events[type].slice();
  return ret;
};

EventEmitter.prototype.listenerCount = function(type) {
  if (this._events) {
    var evlistener = this._events[type];

    if (isFunction(evlistener))
      return 1;
    else if (evlistener)
      return evlistener.length;
  }
  return 0;
};

EventEmitter.listenerCount = function(emitter, type) {
  return emitter.listenerCount(type);
};

function isFunction(arg) {
  return typeof arg === 'function';
}

function isNumber(arg) {
  return typeof arg === 'number';
}

function isObject(arg) {
  return typeof arg === 'object' && arg !== null;
}

function isUndefined(arg) {
  return arg === void 0;
}

},{}],16:[function(require,module,exports){
if (typeof Object.create === 'function') {
  // implementation from standard node.js 'util' module
  module.exports = function inherits(ctor, superCtor) {
    ctor.super_ = superCtor
    ctor.prototype = Object.create(superCtor.prototype, {
      constructor: {
        value: ctor,
        enumerable: false,
        writable: true,
        configurable: true
      }
    });
  };
} else {
  // old school shim for old browsers
  module.exports = function inherits(ctor, superCtor) {
    ctor.super_ = superCtor
    var TempCtor = function () {}
    TempCtor.prototype = superCtor.prototype
    ctor.prototype = new TempCtor()
    ctor.prototype.constructor = ctor
  }
}

},{}],17:[function(require,module,exports){
/**
 * Determine if an object is Buffer
 *
 * Author:   Feross Aboukhadijeh <feross@feross.org> <http://feross.org>
 * License:  MIT
 *
 * `npm install is-buffer`
 */

module.exports = function (obj) {
  return !!(obj != null &&
    (obj._isBuffer || // For Safari 5-7 (missing Object.prototype.constructor)
      (obj.constructor &&
      typeof obj.constructor.isBuffer === 'function' &&
      obj.constructor.isBuffer(obj))
    ))
}

},{}],18:[function(require,module,exports){
module.exports = Array.isArray || function (arr) {
  return Object.prototype.toString.call(arr) == '[object Array]';
};

},{}],19:[function(require,module,exports){
// shim for using process in browser

var process = module.exports = {};
var queue = [];
var draining = false;
var currentQueue;
var queueIndex = -1;

function cleanUpNextTick() {
    draining = false;
    if (currentQueue.length) {
        queue = currentQueue.concat(queue);
    } else {
        queueIndex = -1;
    }
    if (queue.length) {
        drainQueue();
    }
}

function drainQueue() {
    if (draining) {
        return;
    }
    var timeout = setTimeout(cleanUpNextTick);
    draining = true;

    var len = queue.length;
    while(len) {
        currentQueue = queue;
        queue = [];
        while (++queueIndex < len) {
            if (currentQueue) {
                currentQueue[queueIndex].run();
            }
        }
        queueIndex = -1;
        len = queue.length;
    }
    currentQueue = null;
    draining = false;
    clearTimeout(timeout);
}

process.nextTick = function (fun) {
    var args = new Array(arguments.length - 1);
    if (arguments.length > 1) {
        for (var i = 1; i < arguments.length; i++) {
            args[i - 1] = arguments[i];
        }
    }
    queue.push(new Item(fun, args));
    if (queue.length === 1 && !draining) {
        setTimeout(drainQueue, 0);
    }
};

// v8 likes predictible objects
function Item(fun, array) {
    this.fun = fun;
    this.array = array;
}
Item.prototype.run = function () {
    this.fun.apply(null, this.array);
};
process.title = 'browser';
process.browser = true;
process.env = {};
process.argv = [];
process.version = ''; // empty string to avoid regexp issues
process.versions = {};

function noop() {}

process.on = noop;
process.addListener = noop;
process.once = noop;
process.off = noop;
process.removeListener = noop;
process.removeAllListeners = noop;
process.emit = noop;

process.binding = function (name) {
    throw new Error('process.binding is not supported');
};

process.cwd = function () { return '/' };
process.chdir = function (dir) {
    throw new Error('process.chdir is not supported');
};
process.umask = function() { return 0; };

},{}],20:[function(require,module,exports){
module.exports = require("./lib/_stream_duplex.js")

},{"./lib/_stream_duplex.js":21}],21:[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';

/*<replacement>*/
var objectKeys = Object.keys || function (obj) {
  var keys = [];
  for (var key in obj) keys.push(key);
  return keys;
}
/*</replacement>*/


module.exports = Duplex;

/*<replacement>*/
var processNextTick = require('process-nextick-args');
/*</replacement>*/



/*<replacement>*/
var util = require('core-util-is');
util.inherits = require('inherits');
/*</replacement>*/

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":23,"./_stream_writable":25,"core-util-is":26,"inherits":16,"process-nextick-args":27}],22:[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');

/*<replacement>*/
var util = require('core-util-is');
util.inherits = require('inherits');
/*</replacement>*/

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":24,"core-util-is":26,"inherits":16}],23:[function(require,module,exports){
(function (process){
'use strict';

module.exports = Readable;

/*<replacement>*/
var processNextTick = require('process-nextick-args');
/*</replacement>*/


/*<replacement>*/
var isArray = require('isarray');
/*</replacement>*/


/*<replacement>*/
var Buffer = require('buffer').Buffer;
/*</replacement>*/

Readable.ReadableState = ReadableState;

var EE = require('events');

/*<replacement>*/
var EElistenerCount = function(emitter, type) {
  return emitter.listeners(type).length;
};
/*</replacement>*/



/*<replacement>*/
var Stream;
(function (){try{
  Stream = require('st' + 'ream');
}catch(_){}finally{
  if (!Stream)
    Stream = require('events').EventEmitter;
}}())
/*</replacement>*/

var Buffer = require('buffer').Buffer;

/*<replacement>*/
var util = require('core-util-is');
util.inherits = require('inherits');
/*</replacement>*/



/*<replacement>*/
var debugUtil = require('util');
var debug;
if (debugUtil && debugUtil.debuglog) {
  debug = debugUtil.debuglog('stream');
} else {
  debug = function () {};
}
/*</replacement>*/

var StringDecoder;

util.inherits(Readable, Stream);

function ReadableState(options, stream) {
  var 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 = ~~this.highWaterMark;

  this.buffer = [];
  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 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;

  // 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;

  // 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) {
  var 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);
}

// 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 (!state.objectMode && typeof chunk === 'string') {
    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);
};

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) {
    state.reading = false;
    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);

      if (!addToFront)
        state.reading = false;

      // 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);
    }
  } 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;
  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
    n--;
    n |= n >>> 1;
    n |= n >>> 2;
    n |= n >>> 4;
    n |= n >>> 8;
    n |= n >>> 16;
    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 = computeNewHighWaterMark(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) {
  debug('read', n);
  var state = this._readableState;
  var nOrig = n;

  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)) {
    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);
  }

  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 (doRead && !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;
  }

  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 tried to read() past the EOF, then emit end on the next tick.
  if (nOrig !== n && state.ended && 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)) &&
      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.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('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 : cleanup;
  if (state.endEmitted)
    processNextTick(endFn);
  else
    src.once('end', endFn);

  dest.on('unpipe', onunpipe);
  function onunpipe(readable) {
    debug('onunpipe');
    if (readable === src) {
      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', 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 (state.awaitDrain &&
        (!dest._writableState || dest._writableState.needDrain))
      ondrain();
  }

  src.on('data', ondata);
  function ondata(chunk) {
    debug('ondata');
    var ret = dest.write(chunk);
    if (false === ret) {
      // If the user unpiped during `dest.write()`, it is possible
      // to get stuck in a permanently paused state if that write
      // also returned false.
      if (state.pipesCount === 1 &&
          state.pipes[0] === dest &&
          src.listenerCount('data') === 1 &&
          !cleanedUp) {
        debug('false write response, pause', src._readableState.awaitDrain);
        src._readableState.awaitDrain++;
      }
      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);
  }
  // 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() {
    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;

  // 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);
    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);
    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 listening to data, and it has not explicitly been paused,
  // then call resume to start the flow of data on the next tick.
  if (ev === 'data' && false !== this._readableState.flowing) {
    this.resume();
  }

  if (ev === 'readable' && this.readable) {
    var state = this._readableState;
    if (!state.readableListening) {
      state.readableListening = true;
      state.emittedReadable = false;
      state.needReadable = true;
      if (!state.reading) {
        processNextTick(nReadingNextTick, this);
      } else if (state.length) {
        emitReadable(this, state);
      }
    }
  }

  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;
  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);
  if (state.flowing) {
    do {
      var chunk = stream.read();
    } while (null !== chunk && state.flowing);
  }
}

// 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.
  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) {
    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.
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 if (list.length === 1)
      ret = list[0];
    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.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'))
},{"./_stream_duplex":21,"_process":19,"buffer":"buffer","core-util-is":26,"events":15,"inherits":16,"isarray":18,"process-nextick-args":27,"string_decoder/":34,"util":11}],24:[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
// 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');

/*<replacement>*/
var util = require('core-util-is');
util.inherits = require('inherits');
/*</replacement>*/

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;
}

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);

  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.
  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;
  }

  this.once('prefinish', function() {
    if (typeof this._flush === 'function')
      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 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":21,"core-util-is":26,"inherits":16}],25:[function(require,module,exports){
// 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';

module.exports = Writable;

/*<replacement>*/
var processNextTick = require('process-nextick-args');
/*</replacement>*/


/*<replacement>*/
var Buffer = require('buffer').Buffer;
/*</replacement>*/

Writable.WritableState = WritableState;


/*<replacement>*/
var util = require('core-util-is');
util.inherits = require('inherits');
/*</replacement>*/


/*<replacement>*/
var internalUtil = {
  deprecate: require('util-deprecate')
};
/*</replacement>*/



/*<replacement>*/
var Stream;
(function (){try{
  Stream = require('st' + 'ream');
}catch(_){}finally{
  if (!Stream)
    Stream = require('events').EventEmitter;
}}())
/*</replacement>*/

var Buffer = require('buffer').Buffer;

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) {
  var 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 = ~~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;

  // 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;
}

WritableState.prototype.getBuffer = function writableStateGetBuffer() {
  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(_){}}());


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;

  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.'));
};


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);
}

// 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)) &&
      typeof chunk !== 'string' &&
      chunk !== null &&
      chunk !== undefined &&
      !state.objectMode) {
    var er = new TypeError('Invalid non-string/buffer chunk');
    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;

  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 = nop;

  if (state.ended)
    writeAfterEnd(this, cb);
  else if (validChunk(this, state, chunk, cb)) {
    state.pendingcb++;
    ret = writeOrBuffer(this, state, 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;
};

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.corked) {
    var last = state.lastBufferedRequest;
    state.lastBufferedRequest = new WriteReq(chunk, encoding, cb);
    if (last) {
      last.next = state.lastBufferedRequest;
    } else {
      state.bufferedRequest = state.lastBufferedRequest;
    }
  } 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)
    processNextTick(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(state);

    if (!finished &&
        !state.corked &&
        !state.bufferProcessing &&
        state.bufferedRequest) {
      clearBuffer(stream, state);
    }

    if (sync) {
      processNextTick(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 buffer = [];
    var cbs = [];
    while (entry) {
      cbs.push(entry.callback);
      buffer.push(entry);
      entry = entry.next;
    }

    // count the one we are adding, as well.
    // TODO(isaacs) clean this up
    state.pendingcb++;
    state.lastBufferedRequest = null;
    doWrite(stream, state, true, state.length, buffer, '', function(err) {
      for (var i = 0; i < cbs.length; i++) {
        state.pendingcb--;
        cbs[i](err);
      }
    });

    // Clear buffer
  } 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.bufferedRequest = entry;
  state.bufferProcessing = false;
}

Writable.prototype._write = function(chunk, encoding, cb) {
  cb(new Error('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 prefinish(stream, state) {
  if (!state.prefinished) {
    state.prefinished = true;
    stream.emit('prefinish');
  }
}

function finishMaybe(stream, state) {
  var need = needFinish(state);
  if (need) {
    if (state.pendingcb === 0) {
      prefinish(stream, state);
      state.finished = true;
      stream.emit('finish');
    } else {
      prefinish(stream, state);
    }
  }
  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_duplex":21,"buffer":"buffer","core-util-is":26,"events":15,"inherits":16,"process-nextick-args":27,"util-deprecate":28}],26:[function(require,module,exports){
(function (Buffer){
// 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.

// NOTE: These type checking functions intentionally don't use `instanceof`
// because it is fragile and can be easily faked with `Object.create()`.
function isArray(ar) {
  return Array.isArray(ar);
}
exports.isArray = isArray;

function isBoolean(arg) {
  return typeof arg === 'boolean';
}
exports.isBoolean = isBoolean;

function isNull(arg) {
  return arg === null;
}
exports.isNull = isNull;

function isNullOrUndefined(arg) {
  return arg == null;
}
exports.isNullOrUndefined = isNullOrUndefined;

function isNumber(arg) {
  return typeof arg === 'number';
}
exports.isNumber = isNumber;

function isString(arg) {
  return typeof arg === 'string';
}
exports.isString = isString;

function isSymbol(arg) {
  return typeof arg === 'symbol';
}
exports.isSymbol = isSymbol;

function isUndefined(arg) {
  return arg === void 0;
}
exports.isUndefined = isUndefined;

function isRegExp(re) {
  return isObject(re) && objectToString(re) === '[object RegExp]';
}
exports.isRegExp = isRegExp;

function isObject(arg) {
  return typeof arg === 'object' && arg !== null;
}
exports.isObject = isObject;

function isDate(d) {
  return isObject(d) && objectToString(d) === '[object Date]';
}
exports.isDate = isDate;

function isError(e) {
  return isObject(e) &&
      (objectToString(e) === '[object Error]' || e instanceof Error);
}
exports.isError = isError;

function isFunction(arg) {
  return typeof arg === 'function';
}
exports.isFunction = isFunction;

function isPrimitive(arg) {
  return arg === null ||
         typeof arg === 'boolean' ||
         typeof arg === 'number' ||
         typeof arg === 'string' ||
         typeof arg === 'symbol' ||  // ES6 symbol
         typeof arg === 'undefined';
}
exports.isPrimitive = isPrimitive;

function isBuffer(arg) {
  return Buffer.isBuffer(arg);
}
exports.isBuffer = isBuffer;

function objectToString(o) {
  return Object.prototype.toString.call(o);
}
}).call(this,{"isBuffer":require("../../../../insert-module-globals/node_modules/is-buffer/index.js")})
},{"../../../../insert-module-globals/node_modules/is-buffer/index.js":17}],27:[function(require,module,exports){
(function (process){
'use strict';
module.exports = nextTick;

function nextTick(fn) {
  var args = new Array(arguments.length - 1);
  var i = 0;
  while (i < args.length) {
    args[i++] = arguments[i];
  }
  process.nextTick(function afterTick() {
    fn.apply(null, args);
  });
}

}).call(this,require('_process'))
},{"_process":19}],28:[function(require,module,exports){
(function (global){

/**
 * Module exports.
 */

module.exports = deprecate;

/**
 * Mark that a method should not be used.
 * Returns a modified function which warns once by default.
 *
 * If `localStorage.noDeprecation = true` is set, then it is a no-op.
 *
 * If `localStorage.throwDeprecation = true` is set, then deprecated functions
 * will throw an Error when invoked.
 *
 * If `localStorage.traceDeprecation = true` is set, then deprecated functions
 * will invoke `console.trace()` instead of `console.error()`.
 *
 * @param {Function} fn - the function to deprecate
 * @param {String} msg - the string to print to the console when `fn` is invoked
 * @returns {Function} a new "deprecated" version of `fn`
 * @api public
 */

function deprecate (fn, msg) {
  if (config('noDeprecation')) {
    return fn;
  }

  var warned = false;
  function deprecated() {
    if (!warned) {
      if (config('throwDeprecation')) {
        throw new Error(msg);
      } else if (config('traceDeprecation')) {
        console.trace(msg);
      } else {
        console.warn(msg);
      }
      warned = true;
    }
    return fn.apply(this, arguments);
  }

  return deprecated;
}

/**
 * Checks `localStorage` for boolean values for the given `name`.
 *
 * @param {String} name
 * @returns {Boolean}
 * @api private
 */

function config (name) {
  // accessing global.localStorage can trigger a DOMException in sandboxed iframes
  try {
    if (!global.localStorage) return false;
  } catch (_) {
    return false;
  }
  var val = global.localStorage[name];
  if (null == val) return false;
  return String(val).toLowerCase() === 'true';
}

}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{}],29:[function(require,module,exports){
module.exports = require("./lib/_stream_passthrough.js")

},{"./lib/_stream_passthrough.js":22}],30:[function(require,module,exports){
var Stream = (function (){
  try {
    return require('st' + 'ream'); // hack to fix a circular dependency issue when used with browserify
  } catch(_){}
}());
exports = module.exports = require('./lib/_stream_readable.js');
exports.Stream = 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":21,"./lib/_stream_passthrough.js":22,"./lib/_stream_readable.js":23,"./lib/_stream_transform.js":24,"./lib/_stream_writable.js":25}],31:[function(require,module,exports){
module.exports = require("./lib/_stream_transform.js")

},{"./lib/_stream_transform.js":24}],32:[function(require,module,exports){
module.exports = require("./lib/_stream_writable.js")

},{"./lib/_stream_writable.js":25}],33:[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.

module.exports = Stream;

var EE = require('events').EventEmitter;
var inherits = require('inherits');

inherits(Stream, EE);
Stream.Readable = require('readable-stream/readable.js');
Stream.Writable = require('readable-stream/writable.js');
Stream.Duplex = require('readable-stream/duplex.js');
Stream.Transform = require('readable-stream/transform.js');
Stream.PassThrough = require('readable-stream/passthrough.js');

// Backwards-compat with node 0.4.x
Stream.Stream = Stream;



// old-style streams.  Note that the pipe method (the only relevant
// part of this class) is overridden in the Readable class.

function Stream() {
  EE.call(this);
}

Stream.prototype.pipe = function(dest, options) {
  var source = this;

  function ondata(chunk) {
    if (dest.writable) {
      if (false === dest.write(chunk) && source.pause) {
        source.pause();
      }
    }
  }

  source.on('data', ondata);

  function ondrain() {
    if (source.readable && source.resume) {
      source.resume();
    }
  }

  dest.on('drain', ondrain);

  // If the 'end' option is not supplied, dest.end() will be called when
  // source gets the 'end' or 'close' events.  Only dest.end() once.
  if (!dest._isStdio && (!options || options.end !== false)) {
    source.on('end', onend);
    source.on('close', onclose);
  }

  var didOnEnd = false;
  function onend() {
    if (didOnEnd) return;
    didOnEnd = true;

    dest.end();
  }


  function onclose() {
    if (didOnEnd) return;
    didOnEnd = true;

    if (typeof dest.destroy === 'function') dest.destroy();
  }

  // don't leave dangling pipes when there are errors.
  function onerror(er) {
    cleanup();
    if (EE.listenerCount(this, 'error') === 0) {
      throw er; // Unhandled stream error in pipe.
    }
  }

  source.on('error', onerror);
  dest.on('error', onerror);

  // remove all the event listeners that were added.
  function cleanup() {
    source.removeListener('data', ondata);
    dest.removeListener('drain', ondrain);

    source.removeListener('end', onend);
    source.removeListener('close', onclose);

    source.removeListener('error', onerror);
    dest.removeListener('error', onerror);

    source.removeListener('end', cleanup);
    source.removeListener('close', cleanup);

    dest.removeListener('close', cleanup);
  }

  source.on('end', cleanup);
  source.on('close', cleanup);

  dest.on('close', cleanup);

  dest.emit('pipe', source);

  // Allow for unix-like usage: A.pipe(B).pipe(C)
  return dest;
};

},{"events":15,"inherits":16,"readable-stream/duplex.js":20,"readable-stream/passthrough.js":29,"readable-stream/readable.js":30,"readable-stream/transform.js":31,"readable-stream/writable.js":32}],34:[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":"buffer"}],35:[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';
}
},{}],36:[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.

var formatRegExp = /%[sdj%]/g;
exports.format = function(f) {
  if (!isString(f)) {
    var objects = [];
    for (var i = 0; i < arguments.length; i++) {
      objects.push(inspect(arguments[i]));
    }
    return objects.join(' ');
  }

  var i = 1;
  var args = arguments;
  var len = args.length;
  var str = String(f).replace(formatRegExp, function(x) {
    if (x === '%%') return '%';
    if (i >= len) return x;
    switch (x) {
      case '%s': return String(args[i++]);
      case '%d': return Number(args[i++]);
      case '%j':
        try {
          return JSON.stringify(args[i++]);
        } catch (_) {
          return '[Circular]';
        }
      default:
        return x;
    }
  });
  for (var x = args[i]; i < len; x = args[++i]) {
    if (isNull(x) || !isObject(x)) {
      str += ' ' + x;
    } else {
      str += ' ' + inspect(x);
    }
  }
  return str;
};


// Mark that a method should not be used.
// Returns a modified function which warns once by default.
// If --no-deprecation is set, then it is a no-op.
exports.deprecate = function(fn, msg) {
  // Allow for deprecating things in the process of starting up.
  if (isUndefined(global.process)) {
    return function() {
      return exports.deprecate(fn, msg).apply(this, arguments);
    };
  }

  if (process.noDeprecation === true) {
    return fn;
  }

  var warned = false;
  function deprecated() {
    if (!warned) {
      if (process.throwDeprecation) {
        throw new Error(msg);
      } else if (process.traceDeprecation) {
        console.trace(msg);
      } else {
        console.error(msg);
      }
      warned = true;
    }
    return fn.apply(this, arguments);
  }

  return deprecated;
};


var debugs = {};
var debugEnviron;
exports.debuglog = function(set) {
  if (isUndefined(debugEnviron))
    debugEnviron = process.env.NODE_DEBUG || '';
  set = set.toUpperCase();
  if (!debugs[set]) {
    if (new RegExp('\\b' + set + '\\b', 'i').test(debugEnviron)) {
      var pid = process.pid;
      debugs[set] = function() {
        var msg = exports.format.apply(exports, arguments);
        console.error('%s %d: %s', set, pid, msg);
      };
    } else {
      debugs[set] = function() {};
    }
  }
  return debugs[set];
};


/**
 * Echos the value of a value. Trys to print the value out
 * in the best way possible given the different types.
 *
 * @param {Object} obj The object to print out.
 * @param {Object} opts Optional options object that alters the output.
 */
/* legacy: obj, showHidden, depth, colors*/
function inspect(obj, opts) {
  // default options
  var ctx = {
    seen: [],
    stylize: stylizeNoColor
  };
  // legacy...
  if (arguments.length >= 3) ctx.depth = arguments[2];
  if (arguments.length >= 4) ctx.colors = arguments[3];
  if (isBoolean(opts)) {
    // legacy...
    ctx.showHidden = opts;
  } else if (opts) {
    // got an "options" object
    exports._extend(ctx, opts);
  }
  // set default options
  if (isUndefined(ctx.showHidden)) ctx.showHidden = false;
  if (isUndefined(ctx.depth)) ctx.depth = 2;
  if (isUndefined(ctx.colors)) ctx.colors = false;
  if (isUndefined(ctx.customInspect)) ctx.customInspect = true;
  if (ctx.colors) ctx.stylize = stylizeWithColor;
  return formatValue(ctx, obj, ctx.depth);
}
exports.inspect = inspect;


// http://en.wikipedia.org/wiki/ANSI_escape_code#graphics
inspect.colors = {
  'bold' : [1, 22],
  'italic' : [3, 23],
  'underline' : [4, 24],
  'inverse' : [7, 27],
  'white' : [37, 39],
  'grey' : [90, 39],
  'black' : [30, 39],
  'blue' : [34, 39],
  'cyan' : [36, 39],
  'green' : [32, 39],
  'magenta' : [35, 39],
  'red' : [31, 39],
  'yellow' : [33, 39]
};

// Don't use 'blue' not visible on cmd.exe
inspect.styles = {
  'special': 'cyan',
  'number': 'yellow',
  'boolean': 'yellow',
  'undefined': 'grey',
  'null': 'bold',
  'string': 'green',
  'date': 'magenta',
  // "name": intentionally not styling
  'regexp': 'red'
};


function stylizeWithColor(str, styleType) {
  var style = inspect.styles[styleType];

  if (style) {
    return '\u001b[' + inspect.colors[style][0] + 'm' + str +
           '\u001b[' + inspect.colors[style][1] + 'm';
  } else {
    return str;
  }
}


function stylizeNoColor(str, styleType) {
  return str;
}


function arrayToHash(array) {
  var hash = {};

  array.forEach(function(val, idx) {
    hash[val] = true;
  });

  return hash;
}


function formatValue(ctx, value, recurseTimes) {
  // Provide a hook for user-specified inspect functions.
  // Check that value is an object with an inspect function on it
  if (ctx.customInspect &&
      value &&
      isFunction(value.inspect) &&
      // Filter out the util module, it's inspect function is special
      value.inspect !== exports.inspect &&
      // Also filter out any prototype objects using the circular check.
      !(value.constructor && value.constructor.prototype === value)) {
    var ret = value.inspect(recurseTimes, ctx);
    if (!isString(ret)) {
      ret = formatValue(ctx, ret, recurseTimes);
    }
    return ret;
  }

  // Primitive types cannot have properties
  var primitive = formatPrimitive(ctx, value);
  if (primitive) {
    return primitive;
  }

  // Look up the keys of the object.
  var keys = Object.keys(value);
  var visibleKeys = arrayToHash(keys);

  if (ctx.showHidden) {
    keys = Object.getOwnPropertyNames(value);
  }

  // IE doesn't make error fields non-enumerable
  // http://msdn.microsoft.com/en-us/library/ie/dww52sbt(v=vs.94).aspx
  if (isError(value)
      && (keys.indexOf('message') >= 0 || keys.indexOf('description') >= 0)) {
    return formatError(value);
  }

  // Some type of object without properties can be shortcutted.
  if (keys.length === 0) {
    if (isFunction(value)) {
      var name = value.name ? ': ' + value.name : '';
      return ctx.stylize('[Function' + name + ']', 'special');
    }
    if (isRegExp(value)) {
      return ctx.stylize(RegExp.prototype.toString.call(value), 'regexp');
    }
    if (isDate(value)) {
      return ctx.stylize(Date.prototype.toString.call(value), 'date');
    }
    if (isError(value)) {
      return formatError(value);
    }
  }

  var base = '', array = false, braces = ['{', '}'];

  // Make Array say that they are Array
  if (isArray(value)) {
    array = true;
    braces = ['[', ']'];
  }

  // Make functions say that they are functions
  if (isFunction(value)) {
    var n = value.name ? ': ' + value.name : '';
    base = ' [Function' + n + ']';
  }

  // Make RegExps say that they are RegExps
  if (isRegExp(value)) {
    base = ' ' + RegExp.prototype.toString.call(value);
  }

  // Make dates with properties first say the date
  if (isDate(value)) {
    base = ' ' + Date.prototype.toUTCString.call(value);
  }

  // Make error with message first say the error
  if (isError(value)) {
    base = ' ' + formatError(value);
  }

  if (keys.length === 0 && (!array || value.length == 0)) {
    return braces[0] + base + braces[1];
  }

  if (recurseTimes < 0) {
    if (isRegExp(value)) {
      return ctx.stylize(RegExp.prototype.toString.call(value), 'regexp');
    } else {
      return ctx.stylize('[Object]', 'special');
    }
  }

  ctx.seen.push(value);

  var output;
  if (array) {
    output = formatArray(ctx, value, recurseTimes, visibleKeys, keys);
  } else {
    output = keys.map(function(key) {
      return formatProperty(ctx, value, recurseTimes, visibleKeys, key, array);
    });
  }

  ctx.seen.pop();

  return reduceToSingleString(output, base, braces);
}


function formatPrimitive(ctx, value) {
  if (isUndefined(value))
    return ctx.stylize('undefined', 'undefined');
  if (isString(value)) {
    var simple = '\'' + JSON.stringify(value).replace(/^"|"$/g, '')
                                             .replace(/'/g, "\\'")
                                             .replace(/\\"/g, '"') + '\'';
    return ctx.stylize(simple, 'string');
  }
  if (isNumber(value))
    return ctx.stylize('' + value, 'number');
  if (isBoolean(value))
    return ctx.stylize('' + value, 'boolean');
  // For some reason typeof null is "object", so special case here.
  if (isNull(value))
    return ctx.stylize('null', 'null');
}


function formatError(value) {
  return '[' + Error.prototype.toString.call(value) + ']';
}


function formatArray(ctx, value, recurseTimes, visibleKeys, keys) {
  var output = [];
  for (var i = 0, l = value.length; i < l; ++i) {
    if (hasOwnProperty(value, String(i))) {
      output.push(formatProperty(ctx, value, recurseTimes, visibleKeys,
          String(i), true));
    } else {
      output.push('');
    }
  }
  keys.forEach(function(key) {
    if (!key.match(/^\d+$/)) {
      output.push(formatProperty(ctx, value, recurseTimes, visibleKeys,
          key, true));
    }
  });
  return output;
}


function formatProperty(ctx, value, recurseTimes, visibleKeys, key, array) {
  var name, str, desc;
  desc = Object.getOwnPropertyDescriptor(value, key) || { value: value[key] };
  if (desc.get) {
    if (desc.set) {
      str = ctx.stylize('[Getter/Setter]', 'special');
    } else {
      str = ctx.stylize('[Getter]', 'special');
    }
  } else {
    if (desc.set) {
      str = ctx.stylize('[Setter]', 'special');
    }
  }
  if (!hasOwnProperty(visibleKeys, key)) {
    name = '[' + key + ']';
  }
  if (!str) {
    if (ctx.seen.indexOf(desc.value) < 0) {
      if (isNull(recurseTimes)) {
        str = formatValue(ctx, desc.value, null);
      } else {
        str = formatValue(ctx, desc.value, recurseTimes - 1);
      }
      if (str.indexOf('\n') > -1) {
        if (array) {
          str = str.split('\n').map(function(line) {
            return '  ' + line;
          }).join('\n').substr(2);
        } else {
          str = '\n' + str.split('\n').map(function(line) {
            return '   ' + line;
          }).join('\n');
        }
      }
    } else {
      str = ctx.stylize('[Circular]', 'special');
    }
  }
  if (isUndefined(name)) {
    if (array && key.match(/^\d+$/)) {
      return str;
    }
    name = JSON.stringify('' + key);
    if (name.match(/^"([a-zA-Z_][a-zA-Z_0-9]*)"$/)) {
      name = name.substr(1, name.length - 2);
      name = ctx.stylize(name, 'name');
    } else {
      name = name.replace(/'/g, "\\'")
                 .replace(/\\"/g, '"')
                 .replace(/(^"|"$)/g, "'");
      name = ctx.stylize(name, 'string');
    }
  }

  return name + ': ' + str;
}


function reduceToSingleString(output, base, braces) {
  var numLinesEst = 0;
  var length = output.reduce(function(prev, cur) {
    numLinesEst++;
    if (cur.indexOf('\n') >= 0) numLinesEst++;
    return prev + cur.replace(/\u001b\[\d\d?m/g, '').length + 1;
  }, 0);

  if (length > 60) {
    return braces[0] +
           (base === '' ? '' : base + '\n ') +
           ' ' +
           output.join(',\n  ') +
           ' ' +
           braces[1];
  }

  return braces[0] + base + ' ' + output.join(', ') + ' ' + braces[1];
}


// NOTE: These type checking functions intentionally don't use `instanceof`
// because it is fragile and can be easily faked with `Object.create()`.
function isArray(ar) {
  return Array.isArray(ar);
}
exports.isArray = isArray;

function isBoolean(arg) {
  return typeof arg === 'boolean';
}
exports.isBoolean = isBoolean;

function isNull(arg) {
  return arg === null;
}
exports.isNull = isNull;

function isNullOrUndefined(arg) {
  return arg == null;
}
exports.isNullOrUndefined = isNullOrUndefined;

function isNumber(arg) {
  return typeof arg === 'number';
}
exports.isNumber = isNumber;

function isString(arg) {
  return typeof arg === 'string';
}
exports.isString = isString;

function isSymbol(arg) {
  return typeof arg === 'symbol';
}
exports.isSymbol = isSymbol;

function isUndefined(arg) {
  return arg === void 0;
}
exports.isUndefined = isUndefined;

function isRegExp(re) {
  return isObject(re) && objectToString(re) === '[object RegExp]';
}
exports.isRegExp = isRegExp;

function isObject(arg) {
  return typeof arg === 'object' && arg !== null;
}
exports.isObject = isObject;

function isDate(d) {
  return isObject(d) && objectToString(d) === '[object Date]';
}
exports.isDate = isDate;

function isError(e) {
  return isObject(e) &&
      (objectToString(e) === '[object Error]' || e instanceof Error);
}
exports.isError = isError;

function isFunction(arg) {
  return typeof arg === 'function';
}
exports.isFunction = isFunction;

function isPrimitive(arg) {
  return arg === null ||
         typeof arg === 'boolean' ||
         typeof arg === 'number' ||
         typeof arg === 'string' ||
         typeof arg === 'symbol' ||  // ES6 symbol
         typeof arg === 'undefined';
}
exports.isPrimitive = isPrimitive;

exports.isBuffer = require('./support/isBuffer');

function objectToString(o) {
  return Object.prototype.toString.call(o);
}


function pad(n) {
  return n < 10 ? '0' + n.toString(10) : n.toString(10);
}


var months = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep',
              'Oct', 'Nov', 'Dec'];

// 26 Feb 16:19:34
function timestamp() {
  var d = new Date();
  var time = [pad(d.getHours()),
              pad(d.getMinutes()),
              pad(d.getSeconds())].join(':');
  return [d.getDate(), months[d.getMonth()], time].join(' ');
}


// log is just a thin wrapper to console.log that prepends a timestamp
exports.log = function() {
  console.log('%s - %s', timestamp(), exports.format.apply(exports, arguments));
};


/**
 * Inherit the prototype methods from one constructor into another.
 *
 * The Function.prototype.inherits from lang.js rewritten as a standalone
 * function (not on Function.prototype). NOTE: If this file is to be loaded
 * during bootstrapping this function needs to be rewritten using some native
 * functions as prototype setup using normal JavaScript does not work as
 * expected during bootstrapping (see mirror.js in r114903).
 *
 * @param {function} ctor Constructor function which needs to inherit the
 *     prototype.
 * @param {function} superCtor Constructor function to inherit prototype from.
 */
exports.inherits = require('inherits');

exports._extend = function(origin, add) {
  // Don't do anything if add isn't an object
  if (!add || !isObject(add)) return origin;

  var keys = Object.keys(add);
  var i = keys.length;
  while (i--) {
    origin[keys[i]] = add[keys[i]];
  }
  return origin;
};

function hasOwnProperty(obj, prop) {
  return Object.prototype.hasOwnProperty.call(obj, prop);
}

}).call(this,require('_process'),typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{"./support/isBuffer":35,"_process":19,"inherits":16}],"buffer":[function(require,module,exports){
(function (global){
/*!
 * The buffer module from node.js, for the browser.
 *
 * @author   Feross Aboukhadijeh <feross@feross.org> <http://feross.org>
 * @license  MIT
 */
/* eslint-disable no-proto */

var base64 = require('base64-js')
var ieee754 = require('ieee754')
var isArray = require('is-array')

exports.Buffer = Buffer
exports.SlowBuffer = SlowBuffer
exports.INSPECT_MAX_BYTES = 50
Buffer.poolSize = 8192 // not used by this implementation

var rootParent = {}

/**
 * If `Buffer.TYPED_ARRAY_SUPPORT`:
 *   === true    Use Uint8Array implementation (fastest)
 *   === false   Use Object implementation (most compatible, even IE6)
 *
 * Browsers that support typed arrays are IE 10+, Firefox 4+, Chrome 7+, Safari 5.1+,
 * Opera 11.6+, iOS 4.2+.
 *
 * Due to various browser bugs, sometimes the Object implementation will be used even
 * when the browser supports typed arrays.
 *
 * Note:
 *
 *   - Firefox 4-29 lacks support for adding new properties to `Uint8Array` instances,
 *     See: https://bugzilla.mozilla.org/show_bug.cgi?id=695438.
 *
 *   - Safari 5-7 lacks support for changing the `Object.prototype.constructor` property
 *     on objects.
 *
 *   - Chrome 9-10 is missing the `TypedArray.prototype.subarray` function.
 *
 *   - IE10 has a broken `TypedArray.prototype.subarray` function which returns arrays of
 *     incorrect length in some situations.

 * We detect these buggy browsers and set `Buffer.TYPED_ARRAY_SUPPORT` to `false` so they
 * get the Object implementation, which is slower but behaves correctly.
 */
Buffer.TYPED_ARRAY_SUPPORT = global.TYPED_ARRAY_SUPPORT !== undefined
  ? global.TYPED_ARRAY_SUPPORT
  : typedArraySupport()

function typedArraySupport () {
  function Bar () {}
  try {
    var arr = new Uint8Array(1)
    arr.foo = function () { return 42 }
    arr.constructor = Bar
    return arr.foo() === 42 && // typed array instances can be augmented
        arr.constructor === Bar && // constructor can be set
        typeof arr.subarray === 'function' && // chrome 9-10 lack `subarray`
        arr.subarray(1, 1).byteLength === 0 // ie10 has broken `subarray`
  } catch (e) {
    return false
  }
}

function kMaxLength () {
  return Buffer.TYPED_ARRAY_SUPPORT
    ? 0x7fffffff
    : 0x3fffffff
}

/**
 * Class: Buffer
 * =============
 *
 * The Buffer constructor returns instances of `Uint8Array` that are augmented
 * with function properties for all the node `Buffer` API functions. We use
 * `Uint8Array` so that square bracket notation works as expected -- it returns
 * a single octet.
 *
 * By augmenting the instances, we can avoid modifying the `Uint8Array`
 * prototype.
 */
function Buffer (arg) {
  if (!(this instanceof Buffer)) {
    // Avoid going through an ArgumentsAdaptorTrampoline in the common case.
    if (arguments.length > 1) return new Buffer(arg, arguments[1])
    return new Buffer(arg)
  }

  this.length = 0
  this.parent = undefined

  // Common case.
  if (typeof arg === 'number') {
    return fromNumber(this, arg)
  }

  // Slightly less common case.
  if (typeof arg === 'string') {
    return fromString(this, arg, arguments.length > 1 ? arguments[1] : 'utf8')
  }

  // Unusual.
  return fromObject(this, arg)
}

function fromNumber (that, length) {
  that = allocate(that, length < 0 ? 0 : checked(length) | 0)
  if (!Buffer.TYPED_ARRAY_SUPPORT) {
    for (var i = 0; i < length; i++) {
      that[i] = 0
    }
  }
  return that
}

function fromString (that, string, encoding) {
  if (typeof encoding !== 'string' || encoding === '') encoding = 'utf8'

  // Assumption: byteLength() return value is always < kMaxLength.
  var length = byteLength(string, encoding) | 0
  that = allocate(that, length)

  that.write(string, encoding)
  return that
}

function fromObject (that, object) {
  if (Buffer.isBuffer(object)) return fromBuffer(that, object)

  if (isArray(object)) return fromArray(that, object)

  if (object == null) {
    throw new TypeError('must start with number, buffer, array or string')
  }

  if (typeof ArrayBuffer !== 'undefined') {
    if (object.buffer instanceof ArrayBuffer) {
      return fromTypedArray(that, object)
    }
    if (object instanceof ArrayBuffer) {
      return fromArrayBuffer(that, object)
    }
  }

  if (object.length) return fromArrayLike(that, object)

  return fromJsonObject(that, object)
}

function fromBuffer (that, buffer) {
  var length = checked(buffer.length) | 0
  that = allocate(that, length)
  buffer.copy(that, 0, 0, length)
  return that
}

function fromArray (that, array) {
  var length = checked(array.length) | 0
  that = allocate(that, length)
  for (var i = 0; i < length; i += 1) {
    that[i] = array[i] & 255
  }
  return that
}

// Duplicate of fromArray() to keep fromArray() monomorphic.
function fromTypedArray (that, array) {
  var length = checked(array.length) | 0
  that = allocate(that, length)
  // Truncating the elements is probably not what people expect from typed
  // arrays with BYTES_PER_ELEMENT > 1 but it's compatible with the behavior
  // of the old Buffer constructor.
  for (var i = 0; i < length; i += 1) {
    that[i] = array[i] & 255
  }
  return that
}

function fromArrayBuffer (that, array) {
  if (Buffer.TYPED_ARRAY_SUPPORT) {
    // Return an augmented `Uint8Array` instance, for best performance
    array.byteLength
    that = Buffer._augment(new Uint8Array(array))
  } else {
    // Fallback: Return an object instance of the Buffer class
    that = fromTypedArray(that, new Uint8Array(array))
  }
  return that
}

function fromArrayLike (that, array) {
  var length = checked(array.length) | 0
  that = allocate(that, length)
  for (var i = 0; i < length; i += 1) {
    that[i] = array[i] & 255
  }
  return that
}

// Deserialize { type: 'Buffer', data: [1,2,3,...] } into a Buffer object.
// Returns a zero-length buffer for inputs that don't conform to the spec.
function fromJsonObject (that, object) {
  var array
  var length = 0

  if (object.type === 'Buffer' && isArray(object.data)) {
    array = object.data
    length = checked(array.length) | 0
  }
  that = allocate(that, length)

  for (var i = 0; i < length; i += 1) {
    that[i] = array[i] & 255
  }
  return that
}

if (Buffer.TYPED_ARRAY_SUPPORT) {
  Buffer.prototype.__proto__ = Uint8Array.prototype
  Buffer.__proto__ = Uint8Array
}

function allocate (that, length) {
  if (Buffer.TYPED_ARRAY_SUPPORT) {
    // Return an augmented `Uint8Array` instance, for best performance
    that = Buffer._augment(new Uint8Array(length))
    that.__proto__ = Buffer.prototype
  } else {
    // Fallback: Return an object instance of the Buffer class
    that.length = length
    that._isBuffer = true
  }

  var fromPool = length !== 0 && length <= Buffer.poolSize >>> 1
  if (fromPool) that.parent = rootParent

  return that
}

function checked (length) {
  // Note: cannot use `length < kMaxLength` here because that fails when
  // length is NaN (which is otherwise coerced to zero.)
  if (length >= kMaxLength()) {
    throw new RangeError('Attempt to allocate Buffer larger than maximum ' +
                         'size: 0x' + kMaxLength().toString(16) + ' bytes')
  }
  return length | 0
}

function SlowBuffer (subject, encoding) {
  if (!(this instanceof SlowBuffer)) return new SlowBuffer(subject, encoding)

  var buf = new Buffer(subject, encoding)
  delete buf.parent
  return buf
}

Buffer.isBuffer = function isBuffer (b) {
  return !!(b != null && b._isBuffer)
}

Buffer.compare = function compare (a, b) {
  if (!Buffer.isBuffer(a) || !Buffer.isBuffer(b)) {
    throw new TypeError('Arguments must be Buffers')
  }

  if (a === b) return 0

  var x = a.length
  var y = b.length

  var i = 0
  var len = Math.min(x, y)
  while (i < len) {
    if (a[i] !== b[i]) break

    ++i
  }

  if (i !== len) {
    x = a[i]
    y = b[i]
  }

  if (x < y) return -1
  if (y < x) return 1
  return 0
}

Buffer.isEncoding = function isEncoding (encoding) {
  switch (String(encoding).toLowerCase()) {
    case 'hex':
    case 'utf8':
    case 'utf-8':
    case 'ascii':
    case 'binary':
    case 'base64':
    case 'raw':
    case 'ucs2':
    case 'ucs-2':
    case 'utf16le':
    case 'utf-16le':
      return true
    default:
      return false
  }
}

Buffer.concat = function concat (list, length) {
  if (!isArray(list)) throw new TypeError('list argument must be an Array of Buffers.')

  if (list.length === 0) {
    return new Buffer(0)
  }

  var i
  if (length === undefined) {
    length = 0
    for (i = 0; i < list.length; i++) {
      length += list[i].length
    }
  }

  var buf = new Buffer(length)
  var pos = 0
  for (i = 0; i < list.length; i++) {
    var item = list[i]
    item.copy(buf, pos)
    pos += item.length
  }
  return buf
}

function byteLength (string, encoding) {
  if (typeof string !== 'string') string = '' + string

  var len = string.length
  if (len === 0) return 0

  // Use a for loop to avoid recursion
  var loweredCase = false
  for (;;) {
    switch (encoding) {
      case 'ascii':
      case 'binary':
      // Deprecated
      case 'raw':
      case 'raws':
        return len
      case 'utf8':
      case 'utf-8':
        return utf8ToBytes(string).length
      case 'ucs2':
      case 'ucs-2':
      case 'utf16le':
      case 'utf-16le':
        return len * 2
      case 'hex':
        return len >>> 1
      case 'base64':
        return base64ToBytes(string).length
      default:
        if (loweredCase) return utf8ToBytes(string).length // assume utf8
        encoding = ('' + encoding).toLowerCase()
        loweredCase = true
    }
  }
}
Buffer.byteLength = byteLength

// pre-set for values that may exist in the future
Buffer.prototype.length = undefined
Buffer.prototype.parent = undefined

function slowToString (encoding, start, end) {
  var loweredCase = false

  start = start | 0
  end = end === undefined || end === Infinity ? this.length : end | 0

  if (!encoding) encoding = 'utf8'
  if (start < 0) start = 0
  if (end > this.length) end = this.length
  if (end <= start) return ''

  while (true) {
    switch (encoding) {
      case 'hex':
        return hexSlice(this, start, end)

      case 'utf8':
      case 'utf-8':
        return utf8Slice(this, start, end)

      case 'ascii':
        return asciiSlice(this, start, end)

      case 'binary':
        return binarySlice(this, start, end)

      case 'base64':
        return base64Slice(this, start, end)

      case 'ucs2':
      case 'ucs-2':
      case 'utf16le':
      case 'utf-16le':
        return utf16leSlice(this, start, end)

      default:
        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)
        encoding = (encoding + '').toLowerCase()
        loweredCase = true
    }
  }
}

Buffer.prototype.toString = function toString () {
  var length = this.length | 0
  if (length === 0) return ''
  if (arguments.length === 0) return utf8Slice(this, 0, length)
  return slowToString.apply(this, arguments)
}

Buffer.prototype.equals = function equals (b) {
  if (!Buffer.isBuffer(b)) throw new TypeError('Argument must be a Buffer')
  if (this === b) return true
  return Buffer.compare(this, b) === 0
}

Buffer.prototype.inspect = function inspect () {
  var str = ''
  var max = exports.INSPECT_MAX_BYTES
  if (this.length > 0) {
    str = this.toString('hex', 0, max).match(/.{2}/g).join(' ')
    if (this.length > max) str += ' ... '
  }
  return '<Buffer ' + str + '>'
}

Buffer.prototype.compare = function compare (b) {
  if (!Buffer.isBuffer(b)) throw new TypeError('Argument must be a Buffer')
  if (this === b) return 0
  return Buffer.compare(this, b)
}

Buffer.prototype.indexOf = function indexOf (val, byteOffset) {
  if (byteOffset > 0x7fffffff) byteOffset = 0x7fffffff
  else if (byteOffset < -0x80000000) byteOffset = -0x80000000
  byteOffset >>= 0

  if (this.length === 0) return -1
  if (byteOffset >= this.length) return -1

  // Negative offsets start from the end of the buffer
  if (byteOffset < 0) byteOffset = Math.max(this.length + byteOffset, 0)

  if (typeof val === 'string') {
    if (val.length === 0) return -1 // special case: looking for empty string always fails
    return String.prototype.indexOf.call(this, val, byteOffset)
  }
  if (Buffer.isBuffer(val)) {
    return arrayIndexOf(this, val, byteOffset)
  }
  if (typeof val === 'number') {
    if (Buffer.TYPED_ARRAY_SUPPORT && Uint8Array.prototype.indexOf === 'function') {
      return Uint8Array.prototype.indexOf.call(this, val, byteOffset)
    }
    return arrayIndexOf(this, [ val ], byteOffset)
  }

  function arrayIndexOf (arr, val, byteOffset) {
    var foundIndex = -1
    for (var i = 0; byteOffset + i < arr.length; i++) {
      if (arr[byteOffset + i] === val[foundIndex === -1 ? 0 : i - foundIndex]) {
        if (foundIndex === -1) foundIndex = i
        if (i - foundIndex + 1 === val.length) return byteOffset + foundIndex
      } else {
        foundIndex = -1
      }
    }
    return -1
  }

  throw new TypeError('val must be string, number or Buffer')
}

// `get` is deprecated
Buffer.prototype.get = function get (offset) {
  console.log('.get() is deprecated. Access using array indexes instead.')
  return this.readUInt8(offset)
}

// `set` is deprecated
Buffer.prototype.set = function set (v, offset) {
  console.log('.set() is deprecated. Access using array indexes instead.')
  return this.writeUInt8(v, offset)
}

function hexWrite (buf, string, offset, length) {
  offset = Number(offset) || 0
  var remaining = buf.length - offset
  if (!length) {
    length = remaining
  } else {
    length = Number(length)
    if (length > remaining) {
      length = remaining
    }
  }

  // must be an even number of digits
  var strLen = string.length
  if (strLen % 2 !== 0) throw new Error('Invalid hex string')

  if (length > strLen / 2) {
    length = strLen / 2
  }
  for (var i = 0; i < length; i++) {
    var parsed = parseInt(string.substr(i * 2, 2), 16)
    if (isNaN(parsed)) throw new Error('Invalid hex string')
    buf[offset + i] = parsed
  }
  return i
}

function utf8Write (buf, string, offset, length) {
  return blitBuffer(utf8ToBytes(string, buf.length - offset), buf, offset, length)
}

function asciiWrite (buf, string, offset, length) {
  return blitBuffer(asciiToBytes(string), buf, offset, length)
}

function binaryWrite (buf, string, offset, length) {
  return asciiWrite(buf, string, offset, length)
}

function base64Write (buf, string, offset, length) {
  return blitBuffer(base64ToBytes(string), buf, offset, length)
}

function ucs2Write (buf, string, offset, length) {
  return blitBuffer(utf16leToBytes(string, buf.length - offset), buf, offset, length)
}

Buffer.prototype.write = function write (string, offset, length, encoding) {
  // Buffer#write(string)
  if (offset === undefined) {
    encoding = 'utf8'
    length = this.length
    offset = 0
  // Buffer#write(string, encoding)
  } else if (length === undefined && typeof offset === 'string') {
    encoding = offset
    length = this.length
    offset = 0
  // Buffer#write(string, offset[, length][, encoding])
  } else if (isFinite(offset)) {
    offset = offset | 0
    if (isFinite(length)) {
      length = length | 0
      if (encoding === undefined) encoding = 'utf8'
    } else {
      encoding = length
      length = undefined
    }
  // legacy write(string, encoding, offset, length) - remove in v0.13
  } else {
    var swap = encoding
    encoding = offset
    offset = length | 0
    length = swap
  }

  var remaining = this.length - offset
  if (length === undefined || length > remaining) length = remaining

  if ((string.length > 0 && (length < 0 || offset < 0)) || offset > this.length) {
    throw new RangeError('attempt to write outside buffer bounds')
  }

  if (!encoding) encoding = 'utf8'

  var loweredCase = false
  for (;;) {
    switch (encoding) {
      case 'hex':
        return hexWrite(this, string, offset, length)

      case 'utf8':
      case 'utf-8':
        return utf8Write(this, string, offset, length)

      case 'ascii':
        return asciiWrite(this, string, offset, length)

      case 'binary':
        return binaryWrite(this, string, offset, length)

      case 'base64':
        // Warning: maxLength not taken into account in base64Write
        return base64Write(this, string, offset, length)

      case 'ucs2':
      case 'ucs-2':
      case 'utf16le':
      case 'utf-16le':
        return ucs2Write(this, string, offset, length)

      default:
        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)
        encoding = ('' + encoding).toLowerCase()
        loweredCase = true
    }
  }
}

Buffer.prototype.toJSON = function toJSON () {
  return {
    type: 'Buffer',
    data: Array.prototype.slice.call(this._arr || this, 0)
  }
}

function base64Slice (buf, start, end) {
  if (start === 0 && end === buf.length) {
    return base64.fromByteArray(buf)
  } else {
    return base64.fromByteArray(buf.slice(start, end))
  }
}

function utf8Slice (buf, start, end) {
  end = Math.min(buf.length, end)
  var res = []

  var i = start
  while (i < end) {
    var firstByte = buf[i]
    var codePoint = null
    var bytesPerSequence = (firstByte > 0xEF) ? 4
      : (firstByte > 0xDF) ? 3
      : (firstByte > 0xBF) ? 2
      : 1

    if (i + bytesPerSequence <= end) {
      var secondByte, thirdByte, fourthByte, tempCodePoint

      switch (bytesPerSequence) {
        case 1:
          if (firstByte < 0x80) {
            codePoint = firstByte
          }
          break
        case 2:
          secondByte = buf[i + 1]
          if ((secondByte & 0xC0) === 0x80) {
            tempCodePoint = (firstByte & 0x1F) << 0x6 | (secondByte & 0x3F)
            if (tempCodePoint > 0x7F) {
              codePoint = tempCodePoint
            }
          }
          break
        case 3:
          secondByte = buf[i + 1]
          thirdByte = buf[i + 2]
          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80) {
            tempCodePoint = (firstByte & 0xF) << 0xC | (secondByte & 0x3F) << 0x6 | (thirdByte & 0x3F)
            if (tempCodePoint > 0x7FF && (tempCodePoint < 0xD800 || tempCodePoint > 0xDFFF)) {
              codePoint = tempCodePoint
            }
          }
          break
        case 4:
          secondByte = buf[i + 1]
          thirdByte = buf[i + 2]
          fourthByte = buf[i + 3]
          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80 && (fourthByte & 0xC0) === 0x80) {
            tempCodePoint = (firstByte & 0xF) << 0x12 | (secondByte & 0x3F) << 0xC | (thirdByte & 0x3F) << 0x6 | (fourthByte & 0x3F)
            if (tempCodePoint > 0xFFFF && tempCodePoint < 0x110000) {
              codePoint = tempCodePoint
            }
          }
      }
    }

    if (codePoint === null) {
      // we did not generate a valid codePoint so insert a
      // replacement char (U+FFFD) and advance only 1 byte
      codePoint = 0xFFFD
      bytesPerSequence = 1
    } else if (codePoint > 0xFFFF) {
      // encode to utf16 (surrogate pair dance)
      codePoint -= 0x10000
      res.push(codePoint >>> 10 & 0x3FF | 0xD800)
      codePoint = 0xDC00 | codePoint & 0x3FF
    }

    res.push(codePoint)
    i += bytesPerSequence
  }

  return decodeCodePointsArray(res)
}

// Based on http://stackoverflow.com/a/22747272/680742, the browser with
// the lowest limit is Chrome, with 0x10000 args.
// We go 1 magnitude less, for safety
var MAX_ARGUMENTS_LENGTH = 0x1000

function decodeCodePointsArray (codePoints) {
  var len = codePoints.length
  if (len <= MAX_ARGUMENTS_LENGTH) {
    return String.fromCharCode.apply(String, codePoints) // avoid extra slice()
  }

  // Decode in chunks to avoid "call stack size exceeded".
  var res = ''
  var i = 0
  while (i < len) {
    res += String.fromCharCode.apply(
      String,
      codePoints.slice(i, i += MAX_ARGUMENTS_LENGTH)
    )
  }
  return res
}

function asciiSlice (buf, start, end) {
  var ret = ''
  end = Math.min(buf.length, end)

  for (var i = start; i < end; i++) {
    ret += String.fromCharCode(buf[i] & 0x7F)
  }
  return ret
}

function binarySlice (buf, start, end) {
  var ret = ''
  end = Math.min(buf.length, end)

  for (var i = start; i < end; i++) {
    ret += String.fromCharCode(buf[i])
  }
  return ret
}

function hexSlice (buf, start, end) {
  var len = buf.length

  if (!start || start < 0) start = 0
  if (!end || end < 0 || end > len) end = len

  var out = ''
  for (var i = start; i < end; i++) {
    out += toHex(buf[i])
  }
  return out
}

function utf16leSlice (buf, start, end) {
  var bytes = buf.slice(start, end)
  var res = ''
  for (var i = 0; i < bytes.length; i += 2) {
    res += String.fromCharCode(bytes[i] + bytes[i + 1] * 256)
  }
  return res
}

Buffer.prototype.slice = function slice (start, end) {
  var len = this.length
  start = ~~start
  end = end === undefined ? len : ~~end

  if (start < 0) {
    start += len
    if (start < 0) start = 0
  } else if (start > len) {
    start = len
  }

  if (end < 0) {
    end += len
    if (end < 0) end = 0
  } else if (end > len) {
    end = len
  }

  if (end < start) end = start

  var newBuf
  if (Buffer.TYPED_ARRAY_SUPPORT) {
    newBuf = Buffer._augment(this.subarray(start, end))
  } else {
    var sliceLen = end - start
    newBuf = new Buffer(sliceLen, undefined)
    for (var i = 0; i < sliceLen; i++) {
      newBuf[i] = this[i + start]
    }
  }

  if (newBuf.length) newBuf.parent = this.parent || this

  return newBuf
}

/*
 * Need to make sure that buffer isn't trying to write out of bounds.
 */
function checkOffset (offset, ext, length) {
  if ((offset % 1) !== 0 || offset < 0) throw new RangeError('offset is not uint')
  if (offset + ext > length) throw new RangeError('Trying to access beyond buffer length')
}

Buffer.prototype.readUIntLE = function readUIntLE (offset, byteLength, noAssert) {
  offset = offset | 0
  byteLength = byteLength | 0
  if (!noAssert) checkOffset(offset, byteLength, this.length)

  var val = this[offset]
  var mul = 1
  var i = 0
  while (++i < byteLength && (mul *= 0x100)) {
    val += this[offset + i] * mul
  }

  return val
}

Buffer.prototype.readUIntBE = function readUIntBE (offset, byteLength, noAssert) {
  offset = offset | 0
  byteLength = byteLength | 0
  if (!noAssert) {
    checkOffset(offset, byteLength, this.length)
  }

  var val = this[offset + --byteLength]
  var mul = 1
  while (byteLength > 0 && (mul *= 0x100)) {
    val += this[offset + --byteLength] * mul
  }

  return val
}

Buffer.prototype.readUInt8 = function readUInt8 (offset, noAssert) {
  if (!noAssert) checkOffset(offset, 1, this.length)
  return this[offset]
}

Buffer.prototype.readUInt16LE = function readUInt16LE (offset, noAssert) {
  if (!noAssert) checkOffset(offset, 2, this.length)
  return this[offset] | (this[offset + 1] << 8)
}

Buffer.prototype.readUInt16BE = function readUInt16BE (offset, noAssert) {
  if (!noAssert) checkOffset(offset, 2, this.length)
  return (this[offset] << 8) | this[offset + 1]
}

Buffer.prototype.readUInt32LE = function readUInt32LE (offset, noAssert) {
  if (!noAssert) checkOffset(offset, 4, this.length)

  return ((this[offset]) |
      (this[offset + 1] << 8) |
      (this[offset + 2] << 16)) +
      (this[offset + 3] * 0x1000000)
}

Buffer.prototype.readUInt32BE = function readUInt32BE (offset, noAssert) {
  if (!noAssert) checkOffset(offset, 4, this.length)

  return (this[offset] * 0x1000000) +
    ((this[offset + 1] << 16) |
    (this[offset + 2] << 8) |
    this[offset + 3])
}

Buffer.prototype.readIntLE = function readIntLE (offset, byteLength, noAssert) {
  offset = offset | 0
  byteLength = byteLength | 0
  if (!noAssert) checkOffset(offset, byteLength, this.length)

  var val = this[offset]
  var mul = 1
  var i = 0
  while (++i < byteLength && (mul *= 0x100)) {
    val += this[offset + i] * mul
  }
  mul *= 0x80

  if (val >= mul) val -= Math.pow(2, 8 * byteLength)

  return val
}

Buffer.prototype.readIntBE = function readIntBE (offset, byteLength, noAssert) {
  offset = offset | 0
  byteLength = byteLength | 0
  if (!noAssert) checkOffset(offset, byteLength, this.length)

  var i = byteLength
  var mul = 1
  var val = this[offset + --i]
  while (i > 0 && (mul *= 0x100)) {
    val += this[offset + --i] * mul
  }
  mul *= 0x80

  if (val >= mul) val -= Math.pow(2, 8 * byteLength)

  return val
}

Buffer.prototype.readInt8 = function readInt8 (offset, noAssert) {
  if (!noAssert) checkOffset(offset, 1, this.length)
  if (!(this[offset] & 0x80)) return (this[offset])
  return ((0xff - this[offset] + 1) * -1)
}

Buffer.prototype.readInt16LE = function readInt16LE (offset, noAssert) {
  if (!noAssert) checkOffset(offset, 2, this.length)
  var val = this[offset] | (this[offset + 1] << 8)
  return (val & 0x8000) ? val | 0xFFFF0000 : val
}

Buffer.prototype.readInt16BE = function readInt16BE (offset, noAssert) {
  if (!noAssert) checkOffset(offset, 2, this.length)
  var val = this[offset + 1] | (this[offset] << 8)
  return (val & 0x8000) ? val | 0xFFFF0000 : val
}

Buffer.prototype.readInt32LE = function readInt32LE (offset, noAssert) {
  if (!noAssert) checkOffset(offset, 4, this.length)

  return (this[offset]) |
    (this[offset + 1] << 8) |
    (this[offset + 2] << 16) |
    (this[offset + 3] << 24)
}

Buffer.prototype.readInt32BE = function readInt32BE (offset, noAssert) {
  if (!noAssert) checkOffset(offset, 4, this.length)

  return (this[offset] << 24) |
    (this[offset + 1] << 16) |
    (this[offset + 2] << 8) |
    (this[offset + 3])
}

Buffer.prototype.readFloatLE = function readFloatLE (offset, noAssert) {
  if (!noAssert) checkOffset(offset, 4, this.length)
  return ieee754.read(this, offset, true, 23, 4)
}

Buffer.prototype.readFloatBE = function readFloatBE (offset, noAssert) {
  if (!noAssert) checkOffset(offset, 4, this.length)
  return ieee754.read(this, offset, false, 23, 4)
}

Buffer.prototype.readDoubleLE = function readDoubleLE (offset, noAssert) {
  if (!noAssert) checkOffset(offset, 8, this.length)
  return ieee754.read(this, offset, true, 52, 8)
}

Buffer.prototype.readDoubleBE = function readDoubleBE (offset, noAssert) {
  if (!noAssert) checkOffset(offset, 8, this.length)
  return ieee754.read(this, offset, false, 52, 8)
}

function checkInt (buf, value, offset, ext, max, min) {
  if (!Buffer.isBuffer(buf)) throw new TypeError('buffer must be a Buffer instance')
  if (value > max || value < min) throw new RangeError('value is out of bounds')
  if (offset + ext > buf.length) throw new RangeError('index out of range')
}

Buffer.prototype.writeUIntLE = function writeUIntLE (value, offset, byteLength, noAssert) {
  value = +value
  offset = offset | 0
  byteLength = byteLength | 0
  if (!noAssert) checkInt(this, value, offset, byteLength, Math.pow(2, 8 * byteLength), 0)

  var mul = 1
  var i = 0
  this[offset] = value & 0xFF
  while (++i < byteLength && (mul *= 0x100)) {
    this[offset + i] = (value / mul) & 0xFF
  }

  return offset + byteLength
}

Buffer.prototype.writeUIntBE = function writeUIntBE (value, offset, byteLength, noAssert) {
  value = +value
  offset = offset | 0
  byteLength = byteLength | 0
  if (!noAssert) checkInt(this, value, offset, byteLength, Math.pow(2, 8 * byteLength), 0)

  var i = byteLength - 1
  var mul = 1
  this[offset + i] = value & 0xFF
  while (--i >= 0 && (mul *= 0x100)) {
    this[offset + i] = (value / mul) & 0xFF
  }

  return offset + byteLength
}

Buffer.prototype.writeUInt8 = function writeUInt8 (value, offset, noAssert) {
  value = +value
  offset = offset | 0
  if (!noAssert) checkInt(this, value, offset, 1, 0xff, 0)
  if (!Buffer.TYPED_ARRAY_SUPPORT) value = Math.floor(value)
  this[offset] = (value & 0xff)
  return offset + 1
}

function objectWriteUInt16 (buf, value, offset, littleEndian) {
  if (value < 0) value = 0xffff + value + 1
  for (var i = 0, j = Math.min(buf.length - offset, 2); i < j; i++) {
    buf[offset + i] = (value & (0xff << (8 * (littleEndian ? i : 1 - i)))) >>>
      (littleEndian ? i : 1 - i) * 8
  }
}

Buffer.prototype.writeUInt16LE = function writeUInt16LE (value, offset, noAssert) {
  value = +value
  offset = offset | 0
  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)
  if (Buffer.TYPED_ARRAY_SUPPORT) {
    this[offset] = (value & 0xff)
    this[offset + 1] = (value >>> 8)
  } else {
    objectWriteUInt16(this, value, offset, true)
  }
  return offset + 2
}

Buffer.prototype.writeUInt16BE = function writeUInt16BE (value, offset, noAssert) {
  value = +value
  offset = offset | 0
  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)
  if (Buffer.TYPED_ARRAY_SUPPORT) {
    this[offset] = (value >>> 8)
    this[offset + 1] = (value & 0xff)
  } else {
    objectWriteUInt16(this, value, offset, false)
  }
  return offset + 2
}

function objectWriteUInt32 (buf, value, offset, littleEndian) {
  if (value < 0) value = 0xffffffff + value + 1
  for (var i = 0, j = Math.min(buf.length - offset, 4); i < j; i++) {
    buf[offset + i] = (value >>> (littleEndian ? i : 3 - i) * 8) & 0xff
  }
}

Buffer.prototype.writeUInt32LE = function writeUInt32LE (value, offset, noAssert) {
  value = +value
  offset = offset | 0
  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)
  if (Buffer.TYPED_ARRAY_SUPPORT) {
    this[offset + 3] = (value >>> 24)
    this[offset + 2] = (value >>> 16)
    this[offset + 1] = (value >>> 8)
    this[offset] = (value & 0xff)
  } else {
    objectWriteUInt32(this, value, offset, true)
  }
  return offset + 4
}

Buffer.prototype.writeUInt32BE = function writeUInt32BE (value, offset, noAssert) {
  value = +value
  offset = offset | 0
  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)
  if (Buffer.TYPED_ARRAY_SUPPORT) {
    this[offset] = (value >>> 24)
    this[offset + 1] = (value >>> 16)
    this[offset + 2] = (value >>> 8)
    this[offset + 3] = (value & 0xff)
  } else {
    objectWriteUInt32(this, value, offset, false)
  }
  return offset + 4
}

Buffer.prototype.writeIntLE = function writeIntLE (value, offset, byteLength, noAssert) {
  value = +value
  offset = offset | 0
  if (!noAssert) {
    var limit = Math.pow(2, 8 * byteLength - 1)

    checkInt(this, value, offset, byteLength, limit - 1, -limit)
  }

  var i = 0
  var mul = 1
  var sub = value < 0 ? 1 : 0
  this[offset] = value & 0xFF
  while (++i < byteLength && (mul *= 0x100)) {
    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF
  }

  return offset + byteLength
}

Buffer.prototype.writeIntBE = function writeIntBE (value, offset, byteLength, noAssert) {
  value = +value
  offset = offset | 0
  if (!noAssert) {
    var limit = Math.pow(2, 8 * byteLength - 1)

    checkInt(this, value, offset, byteLength, limit - 1, -limit)
  }

  var i = byteLength - 1
  var mul = 1
  var sub = value < 0 ? 1 : 0
  this[offset + i] = value & 0xFF
  while (--i >= 0 && (mul *= 0x100)) {
    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF
  }

  return offset + byteLength
}

Buffer.prototype.writeInt8 = function writeInt8 (value, offset, noAssert) {
  value = +value
  offset = offset | 0
  if (!noAssert) checkInt(this, value, offset, 1, 0x7f, -0x80)
  if (!Buffer.TYPED_ARRAY_SUPPORT) value = Math.floor(value)
  if (value < 0) value = 0xff + value + 1
  this[offset] = (value & 0xff)
  return offset + 1
}

Buffer.prototype.writeInt16LE = function writeInt16LE (value, offset, noAssert) {
  value = +value
  offset = offset | 0
  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)
  if (Buffer.TYPED_ARRAY_SUPPORT) {
    this[offset] = (value & 0xff)
    this[offset + 1] = (value >>> 8)
  } else {
    objectWriteUInt16(this, value, offset, true)
  }
  return offset + 2
}

Buffer.prototype.writeInt16BE = function writeInt16BE (value, offset, noAssert) {
  value = +value
  offset = offset | 0
  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)
  if (Buffer.TYPED_ARRAY_SUPPORT) {
    this[offset] = (value >>> 8)
    this[offset + 1] = (value & 0xff)
  } else {
    objectWriteUInt16(this, value, offset, false)
  }
  return offset + 2
}

Buffer.prototype.writeInt32LE = function writeInt32LE (value, offset, noAssert) {
  value = +value
  offset = offset | 0
  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)
  if (Buffer.TYPED_ARRAY_SUPPORT) {
    this[offset] = (value & 0xff)
    this[offset + 1] = (value >>> 8)
    this[offset + 2] = (value >>> 16)
    this[offset + 3] = (value >>> 24)
  } else {
    objectWriteUInt32(this, value, offset, true)
  }
  return offset + 4
}

Buffer.prototype.writeInt32BE = function writeInt32BE (value, offset, noAssert) {
  value = +value
  offset = offset | 0
  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)
  if (value < 0) value = 0xffffffff + value + 1
  if (Buffer.TYPED_ARRAY_SUPPORT) {
    this[offset] = (value >>> 24)
    this[offset + 1] = (value >>> 16)
    this[offset + 2] = (value >>> 8)
    this[offset + 3] = (value & 0xff)
  } else {
    objectWriteUInt32(this, value, offset, false)
  }
  return offset + 4
}

function checkIEEE754 (buf, value, offset, ext, max, min) {
  if (value > max || value < min) throw new RangeError('value is out of bounds')
  if (offset + ext > buf.length) throw new RangeError('index out of range')
  if (offset < 0) throw new RangeError('index out of range')
}

function writeFloat (buf, value, offset, littleEndian, noAssert) {
  if (!noAssert) {
    checkIEEE754(buf, value, offset, 4, 3.4028234663852886e+38, -3.4028234663852886e+38)
  }
  ieee754.write(buf, value, offset, littleEndian, 23, 4)
  return offset + 4
}

Buffer.prototype.writeFloatLE = function writeFloatLE (value, offset, noAssert) {
  return writeFloat(this, value, offset, true, noAssert)
}

Buffer.prototype.writeFloatBE = function writeFloatBE (value, offset, noAssert) {
  return writeFloat(this, value, offset, false, noAssert)
}

function writeDouble (buf, value, offset, littleEndian, noAssert) {
  if (!noAssert) {
    checkIEEE754(buf, value, offset, 8, 1.7976931348623157E+308, -1.7976931348623157E+308)
  }
  ieee754.write(buf, value, offset, littleEndian, 52, 8)
  return offset + 8
}

Buffer.prototype.writeDoubleLE = function writeDoubleLE (value, offset, noAssert) {
  return writeDouble(this, value, offset, true, noAssert)
}

Buffer.prototype.writeDoubleBE = function writeDoubleBE (value, offset, noAssert) {
  return writeDouble(this, value, offset, false, noAssert)
}

// copy(targetBuffer, targetStart=0, sourceStart=0, sourceEnd=buffer.length)
Buffer.prototype.copy = function copy (target, targetStart, start, end) {
  if (!start) start = 0
  if (!end && end !== 0) end = this.length
  if (targetStart >= target.length) targetStart = target.length
  if (!targetStart) targetStart = 0
  if (end > 0 && end < start) end = start

  // Copy 0 bytes; we're done
  if (end === start) return 0
  if (target.length === 0 || this.length === 0) return 0

  // Fatal error conditions
  if (targetStart < 0) {
    throw new RangeError('targetStart out of bounds')
  }
  if (start < 0 || start >= this.length) throw new RangeError('sourceStart out of bounds')
  if (end < 0) throw new RangeError('sourceEnd out of bounds')

  // Are we oob?
  if (end > this.length) end = this.length
  if (target.length - targetStart < end - start) {
    end = target.length - targetStart + start
  }

  var len = end - start
  var i

  if (this === target && start < targetStart && targetStart < end) {
    // descending copy from end
    for (i = len - 1; i >= 0; i--) {
      target[i + targetStart] = this[i + start]
    }
  } else if (len < 1000 || !Buffer.TYPED_ARRAY_SUPPORT) {
    // ascending copy from start
    for (i = 0; i < len; i++) {
      target[i + targetStart] = this[i + start]
    }
  } else {
    target._set(this.subarray(start, start + len), targetStart)
  }

  return len
}

// fill(value, start=0, end=buffer.length)
Buffer.prototype.fill = function fill (value, start, end) {
  if (!value) value = 0
  if (!start) start = 0
  if (!end) end = this.length

  if (end < start) throw new RangeError('end < start')

  // Fill 0 bytes; we're done
  if (end === start) return
  if (this.length === 0) return

  if (start < 0 || start >= this.length) throw new RangeError('start out of bounds')
  if (end < 0 || end > this.length) throw new RangeError('end out of bounds')

  var i
  if (typeof value === 'number') {
    for (i = start; i < end; i++) {
      this[i] = value
    }
  } else {
    var bytes = utf8ToBytes(value.toString())
    var len = bytes.length
    for (i = start; i < end; i++) {
      this[i] = bytes[i % len]
    }
  }

  return this
}

/**
 * Creates a new `ArrayBuffer` with the *copied* memory of the buffer instance.
 * Added in Node 0.12. Only available in browsers that support ArrayBuffer.
 */
Buffer.prototype.toArrayBuffer = function toArrayBuffer () {
  if (typeof Uint8Array !== 'undefined') {
    if (Buffer.TYPED_ARRAY_SUPPORT) {
      return (new Buffer(this)).buffer
    } else {
      var buf = new Uint8Array(this.length)
      for (var i = 0, len = buf.length; i < len; i += 1) {
        buf[i] = this[i]
      }
      return buf.buffer
    }
  } else {
    throw new TypeError('Buffer.toArrayBuffer not supported in this browser')
  }
}

// HELPER FUNCTIONS
// ================

var BP = Buffer.prototype

/**
 * Augment a Uint8Array *instance* (not the Uint8Array class!) with Buffer methods
 */
Buffer._augment = function _augment (arr) {
  arr.constructor = Buffer
  arr._isBuffer = true

  // save reference to original Uint8Array set method before overwriting
  arr._set = arr.set

  // deprecated
  arr.get = BP.get
  arr.set = BP.set

  arr.write = BP.write
  arr.toString = BP.toString
  arr.toLocaleString = BP.toString
  arr.toJSON = BP.toJSON
  arr.equals = BP.equals
  arr.compare = BP.compare
  arr.indexOf = BP.indexOf
  arr.copy = BP.copy
  arr.slice = BP.slice
  arr.readUIntLE = BP.readUIntLE
  arr.readUIntBE = BP.readUIntBE
  arr.readUInt8 = BP.readUInt8
  arr.readUInt16LE = BP.readUInt16LE
  arr.readUInt16BE = BP.readUInt16BE
  arr.readUInt32LE = BP.readUInt32LE
  arr.readUInt32BE = BP.readUInt32BE
  arr.readIntLE = BP.readIntLE
  arr.readIntBE = BP.readIntBE
  arr.readInt8 = BP.readInt8
  arr.readInt16LE = BP.readInt16LE
  arr.readInt16BE = BP.readInt16BE
  arr.readInt32LE = BP.readInt32LE
  arr.readInt32BE = BP.readInt32BE
  arr.readFloatLE = BP.readFloatLE
  arr.readFloatBE = BP.readFloatBE
  arr.readDoubleLE = BP.readDoubleLE
  arr.readDoubleBE = BP.readDoubleBE
  arr.writeUInt8 = BP.writeUInt8
  arr.writeUIntLE = BP.writeUIntLE
  arr.writeUIntBE = BP.writeUIntBE
  arr.writeUInt16LE = BP.writeUInt16LE
  arr.writeUInt16BE = BP.writeUInt16BE
  arr.writeUInt32LE = BP.writeUInt32LE
  arr.writeUInt32BE = BP.writeUInt32BE
  arr.writeIntLE = BP.writeIntLE
  arr.writeIntBE = BP.writeIntBE
  arr.writeInt8 = BP.writeInt8
  arr.writeInt16LE = BP.writeInt16LE
  arr.writeInt16BE = BP.writeInt16BE
  arr.writeInt32LE = BP.writeInt32LE
  arr.writeInt32BE = BP.writeInt32BE
  arr.writeFloatLE = BP.writeFloatLE
  arr.writeFloatBE = BP.writeFloatBE
  arr.writeDoubleLE = BP.writeDoubleLE
  arr.writeDoubleBE = BP.writeDoubleBE
  arr.fill = BP.fill
  arr.inspect = BP.inspect
  arr.toArrayBuffer = BP.toArrayBuffer

  return arr
}

var INVALID_BASE64_RE = /[^+\/0-9A-Za-z-_]/g

function base64clean (str) {
  // Node strips out invalid characters like \n and \t from the string, base64-js does not
  str = stringtrim(str).replace(INVALID_BASE64_RE, '')
  // Node converts strings with length < 2 to ''
  if (str.length < 2) return ''
  // Node allows for non-padded base64 strings (missing trailing ===), base64-js does not
  while (str.length % 4 !== 0) {
    str = str + '='
  }
  return str
}

function stringtrim (str) {
  if (str.trim) return str.trim()
  return str.replace(/^\s+|\s+$/g, '')
}

function toHex (n) {
  if (n < 16) return '0' + n.toString(16)
  return n.toString(16)
}

function utf8ToBytes (string, units) {
  units = units || Infinity
  var codePoint
  var length = string.length
  var leadSurrogate = null
  var bytes = []

  for (var i = 0; i < length; i++) {
    codePoint = string.charCodeAt(i)

    // is surrogate component
    if (codePoint > 0xD7FF && codePoint < 0xE000) {
      // last char was a lead
      if (!leadSurrogate) {
        // no lead yet
        if (codePoint > 0xDBFF) {
          // unexpected trail
          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
          continue
        } else if (i + 1 === length) {
          // unpaired lead
          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
          continue
        }

        // valid lead
        leadSurrogate = codePoint

        continue
      }

      // 2 leads in a row
      if (codePoint < 0xDC00) {
        if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
        leadSurrogate = codePoint
        continue
      }

      // valid surrogate pair
      codePoint = leadSurrogate - 0xD800 << 10 | codePoint - 0xDC00 | 0x10000
    } else if (leadSurrogate) {
      // valid bmp char, but last char was a lead
      if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
    }

    leadSurrogate = null

    // encode utf8
    if (codePoint < 0x80) {
      if ((units -= 1) < 0) break
      bytes.push(codePoint)
    } else if (codePoint < 0x800) {
      if ((units -= 2) < 0) break
      bytes.push(
        codePoint >> 0x6 | 0xC0,
        codePoint & 0x3F | 0x80
      )
    } else if (codePoint < 0x10000) {
      if ((units -= 3) < 0) break
      bytes.push(
        codePoint >> 0xC | 0xE0,
        codePoint >> 0x6 & 0x3F | 0x80,
        codePoint & 0x3F | 0x80
      )
    } else if (codePoint < 0x110000) {
      if ((units -= 4) < 0) break
      bytes.push(
        codePoint >> 0x12 | 0xF0,
        codePoint >> 0xC & 0x3F | 0x80,
        codePoint >> 0x6 & 0x3F | 0x80,
        codePoint & 0x3F | 0x80
      )
    } else {
      throw new Error('Invalid code point')
    }
  }

  return bytes
}

function asciiToBytes (str) {
  var byteArray = []
  for (var i = 0; i < str.length; i++) {
    // Node's code seems to be doing this and not & 0x7F..
    byteArray.push(str.charCodeAt(i) & 0xFF)
  }
  return byteArray
}

function utf16leToBytes (str, units) {
  var c, hi, lo
  var byteArray = []
  for (var i = 0; i < str.length; i++) {
    if ((units -= 2) < 0) break

    c = str.charCodeAt(i)
    hi = c >> 8
    lo = c % 256
    byteArray.push(lo)
    byteArray.push(hi)
  }

  return byteArray
}

function base64ToBytes (str) {
  return base64.toByteArray(base64clean(str))
}

function blitBuffer (src, dst, offset, length) {
  for (var i = 0; i < length; i++) {
    if ((i + offset >= dst.length) || (i >= src.length)) break
    dst[i + offset] = src[i]
  }
  return i
}

}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{"base64-js":12,"ieee754":13,"is-array":14}],"lz4":[function(require,module,exports){
/**
 * LZ4 based compression and decompression
 * Copyright (c) 2014 Pierre Curto
 * MIT Licensed
 */

module.exports = require('./static')

module.exports.version = "0.5.1"
module.exports.createDecoderStream = require('./decoder_stream')
module.exports.decode = require('./decoder').LZ4_uncompress

module.exports.createEncoderStream = require('./encoder_stream')
module.exports.encode = require('./encoder').LZ4_compress

// Expose block decoder and encoders
var bindings = module.exports.utils.bindings

module.exports.decodeBlock = bindings.uncompress

module.exports.encodeBound = bindings.compressBound
module.exports.encodeBlock = bindings.compress
module.exports.encodeBlockHC = bindings.compressHC

},{"./decoder":2,"./decoder_stream":3,"./encoder":4,"./encoder_stream":5,"./static":6}]},{},["lz4"]);