From fd2547de0cfad0d4c30e38d76d27b1c12f571878 Mon Sep 17 00:00:00 2001
From: Stephan Porada <sporada@uni-bielefeld.de>
Date: Thu, 21 Nov 2019 16:05:00 +0100
Subject: [PATCH] Add compression of result dictionary and size infos for other
compression or no compression methods
---
app/corpora/events.py | 13 +-
app/static/js/pako.js | 6818 ++++++++++++++++++++++++++++++++++++
app/templates/base.html.j2 | 1 +
3 files changed, 6828 insertions(+), 4 deletions(-)
create mode 100644 app/static/js/pako.js
diff --git a/app/corpora/events.py b/app/corpora/events.py
index 799765f8..34e08ab6 100644
--- a/app/corpora/events.py
+++ b/app/corpora/events.py
@@ -7,6 +7,7 @@ from .CQiWrapper.CQiWrapper import CQiWrapper
import sys
import gzip
import zlib
+import json
'''
' A dictionary containing lists of, with corpus ids associated, Socket.IO
@@ -64,14 +65,18 @@ def recv_query(message):
analysis_client.query_subcorpus(query)
results = analysis_client.show_query_results(result_len=int(message['hits_per_page']),
context_len=int(message['context']))
+ # logger.warning('RESULTS: {}'.format(results))
size_internal_dict = sys.getsizeof(results) / 1000000
size_dict_to_str = sys.getsizeof(str(results)) / 1000000
compressed_str = gzip.compress(str(results).encode())
size_dict_to_str_compressed = sys.getsizeof(compressed_str) / 1000000
- logger.warning('Size of dict for {} hits per page: {} MB'.format(message['hits_per_page'], size_internal_dict))
- logger.warning('Size of dict to string for {} hits per page: {} MB'.format(message['hits_per_page'], size_dict_to_str))
- logger.warning('Size of compressed dict to string for {} hits per page: {} MB'.format(message['hits_per_page'], size_dict_to_str_compressed))
- socketio.emit('query', compressed_str, room=request.sid)
+ zlib_compressed = zlib.compress(json.dumps(results).encode('utf-8'))
+ size_zlib_compressed = sys.getsizeof(zlib_compressed) / 1000000
+ logger.warning('Internal size of dict for {} hits per page and context len {}: {} MB'.format(message['hits_per_page'], message['context'], size_internal_dict))
+ logger.warning('Size of dict as raw string for {} hits per page and context len {}: {} MB'.format(message['hits_per_page'], message['context'], size_dict_to_str))
+ logger.warning('Size of gzip compressed dict to string for {} hits per page and context len {}: {} MB'.format(message['hits_per_page'], message['context'], size_dict_to_str_compressed))
+ logger.warning('Size of zlib compressed and utf-8 encoded string for {} hits per page and context len {}: {} MB'.format(message['hits_per_page'], message['context'], size_zlib_compressed))
+ socketio.emit('query', zlib_compressed, room=request.sid)
def observe_corpus_analysis_connection(app, corpus_id, session_id):
diff --git a/app/static/js/pako.js b/app/static/js/pako.js
new file mode 100644
index 00000000..cf08564e
--- /dev/null
+++ b/app/static/js/pako.js
@@ -0,0 +1,6818 @@
+/* pako 1.0.10 nodeca/pako */(function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}g.pako = f()}})(function(){var define,module,exports;return (function(){function r(e,n,t){function o(i,f){if(!n[i]){if(!e[i]){var c="function"==typeof require&&require;if(!f&&c)return c(i,!0);if(u)return u(i,!0);var a=new Error("Cannot find module '"+i+"'");throw a.code="MODULE_NOT_FOUND",a}var p=n[i]={exports:{}};e[i][0].call(p.exports,function(r){var n=e[i][1][r];return o(n||r)},p,p.exports,r,e,n,t)}return n[i].exports}for(var u="function"==typeof require&&require,i=0;i<t.length;i++)o(t[i]);return o}return r})()({1:[function(require,module,exports){
+'use strict';
+
+
+var zlib_deflate = require('./zlib/deflate');
+var utils = require('./utils/common');
+var strings = require('./utils/strings');
+var msg = require('./zlib/messages');
+var ZStream = require('./zlib/zstream');
+
+var toString = Object.prototype.toString;
+
+/* Public constants ==========================================================*/
+/* ===========================================================================*/
+
+var Z_NO_FLUSH = 0;
+var Z_FINISH = 4;
+
+var Z_OK = 0;
+var Z_STREAM_END = 1;
+var Z_SYNC_FLUSH = 2;
+
+var Z_DEFAULT_COMPRESSION = -1;
+
+var Z_DEFAULT_STRATEGY = 0;
+
+var Z_DEFLATED = 8;
+
+/* ===========================================================================*/
+
+
+/**
+ * class Deflate
+ *
+ * Generic JS-style wrapper for zlib calls. If you don't need
+ * streaming behaviour - use more simple functions: [[deflate]],
+ * [[deflateRaw]] and [[gzip]].
+ **/
+
+/* internal
+ * Deflate.chunks -> Array
+ *
+ * Chunks of output data, if [[Deflate#onData]] not overridden.
+ **/
+
+/**
+ * Deflate.result -> Uint8Array|Array
+ *
+ * Compressed result, generated by default [[Deflate#onData]]
+ * and [[Deflate#onEnd]] handlers. Filled after you push last chunk
+ * (call [[Deflate#push]] with `Z_FINISH` / `true` param) or if you
+ * push a chunk with explicit flush (call [[Deflate#push]] with
+ * `Z_SYNC_FLUSH` param).
+ **/
+
+/**
+ * Deflate.err -> Number
+ *
+ * Error code after deflate finished. 0 (Z_OK) on success.
+ * You will not need it in real life, because deflate errors
+ * are possible only on wrong options or bad `onData` / `onEnd`
+ * custom handlers.
+ **/
+
+/**
+ * Deflate.msg -> String
+ *
+ * Error message, if [[Deflate.err]] != 0
+ **/
+
+
+/**
+ * new Deflate(options)
+ * - options (Object): zlib deflate options.
+ *
+ * Creates new deflator instance with specified params. Throws exception
+ * on bad params. Supported options:
+ *
+ * - `level`
+ * - `windowBits`
+ * - `memLevel`
+ * - `strategy`
+ * - `dictionary`
+ *
+ * [http://zlib.net/manual.html#Advanced](http://zlib.net/manual.html#Advanced)
+ * for more information on these.
+ *
+ * Additional options, for internal needs:
+ *
+ * - `chunkSize` - size of generated data chunks (16K by default)
+ * - `raw` (Boolean) - do raw deflate
+ * - `gzip` (Boolean) - create gzip wrapper
+ * - `to` (String) - if equal to 'string', then result will be "binary string"
+ * (each char code [0..255])
+ * - `header` (Object) - custom header for gzip
+ * - `text` (Boolean) - true if compressed data believed to be text
+ * - `time` (Number) - modification time, unix timestamp
+ * - `os` (Number) - operation system code
+ * - `extra` (Array) - array of bytes with extra data (max 65536)
+ * - `name` (String) - file name (binary string)
+ * - `comment` (String) - comment (binary string)
+ * - `hcrc` (Boolean) - true if header crc should be added
+ *
+ * ##### Example:
+ *
+ * ```javascript
+ * var pako = require('pako')
+ * , chunk1 = Uint8Array([1,2,3,4,5,6,7,8,9])
+ * , chunk2 = Uint8Array([10,11,12,13,14,15,16,17,18,19]);
+ *
+ * var deflate = new pako.Deflate({ level: 3});
+ *
+ * deflate.push(chunk1, false);
+ * deflate.push(chunk2, true); // true -> last chunk
+ *
+ * if (deflate.err) { throw new Error(deflate.err); }
+ *
+ * console.log(deflate.result);
+ * ```
+ **/
+function Deflate(options) {
+ if (!(this instanceof Deflate)) return new Deflate(options);
+
+ this.options = utils.assign({
+ level: Z_DEFAULT_COMPRESSION,
+ method: Z_DEFLATED,
+ chunkSize: 16384,
+ windowBits: 15,
+ memLevel: 8,
+ strategy: Z_DEFAULT_STRATEGY,
+ to: ''
+ }, options || {});
+
+ var opt = this.options;
+
+ if (opt.raw && (opt.windowBits > 0)) {
+ opt.windowBits = -opt.windowBits;
+ }
+
+ else if (opt.gzip && (opt.windowBits > 0) && (opt.windowBits < 16)) {
+ opt.windowBits += 16;
+ }
+
+ this.err = 0; // error code, if happens (0 = Z_OK)
+ this.msg = ''; // error message
+ this.ended = false; // used to avoid multiple onEnd() calls
+ this.chunks = []; // chunks of compressed data
+
+ this.strm = new ZStream();
+ this.strm.avail_out = 0;
+
+ var status = zlib_deflate.deflateInit2(
+ this.strm,
+ opt.level,
+ opt.method,
+ opt.windowBits,
+ opt.memLevel,
+ opt.strategy
+ );
+
+ if (status !== Z_OK) {
+ throw new Error(msg[status]);
+ }
+
+ if (opt.header) {
+ zlib_deflate.deflateSetHeader(this.strm, opt.header);
+ }
+
+ if (opt.dictionary) {
+ var dict;
+ // Convert data if needed
+ if (typeof opt.dictionary === 'string') {
+ // If we need to compress text, change encoding to utf8.
+ dict = strings.string2buf(opt.dictionary);
+ } else if (toString.call(opt.dictionary) === '[object ArrayBuffer]') {
+ dict = new Uint8Array(opt.dictionary);
+ } else {
+ dict = opt.dictionary;
+ }
+
+ status = zlib_deflate.deflateSetDictionary(this.strm, dict);
+
+ if (status !== Z_OK) {
+ throw new Error(msg[status]);
+ }
+
+ this._dict_set = true;
+ }
+}
+
+/**
+ * Deflate#push(data[, mode]) -> Boolean
+ * - data (Uint8Array|Array|ArrayBuffer|String): input data. Strings will be
+ * converted to utf8 byte sequence.
+ * - mode (Number|Boolean): 0..6 for corresponding Z_NO_FLUSH..Z_TREE modes.
+ * See constants. Skipped or `false` means Z_NO_FLUSH, `true` means Z_FINISH.
+ *
+ * Sends input data to deflate pipe, generating [[Deflate#onData]] calls with
+ * new compressed chunks. Returns `true` on success. The last data block must have
+ * mode Z_FINISH (or `true`). That will flush internal pending buffers and call
+ * [[Deflate#onEnd]]. For interim explicit flushes (without ending the stream) you
+ * can use mode Z_SYNC_FLUSH, keeping the compression context.
+ *
+ * On fail call [[Deflate#onEnd]] with error code and return false.
+ *
+ * We strongly recommend to use `Uint8Array` on input for best speed (output
+ * array format is detected automatically). Also, don't skip last param and always
+ * use the same type in your code (boolean or number). That will improve JS speed.
+ *
+ * For regular `Array`-s make sure all elements are [0..255].
+ *
+ * ##### Example
+ *
+ * ```javascript
+ * push(chunk, false); // push one of data chunks
+ * ...
+ * push(chunk, true); // push last chunk
+ * ```
+ **/
+Deflate.prototype.push = function (data, mode) {
+ var strm = this.strm;
+ var chunkSize = this.options.chunkSize;
+ var status, _mode;
+
+ if (this.ended) { return false; }
+
+ _mode = (mode === ~~mode) ? mode : ((mode === true) ? Z_FINISH : Z_NO_FLUSH);
+
+ // Convert data if needed
+ if (typeof data === 'string') {
+ // If we need to compress text, change encoding to utf8.
+ strm.input = strings.string2buf(data);
+ } else if (toString.call(data) === '[object ArrayBuffer]') {
+ strm.input = new Uint8Array(data);
+ } else {
+ strm.input = data;
+ }
+
+ strm.next_in = 0;
+ strm.avail_in = strm.input.length;
+
+ do {
+ if (strm.avail_out === 0) {
+ strm.output = new utils.Buf8(chunkSize);
+ strm.next_out = 0;
+ strm.avail_out = chunkSize;
+ }
+ status = zlib_deflate.deflate(strm, _mode); /* no bad return value */
+
+ if (status !== Z_STREAM_END && status !== Z_OK) {
+ this.onEnd(status);
+ this.ended = true;
+ return false;
+ }
+ if (strm.avail_out === 0 || (strm.avail_in === 0 && (_mode === Z_FINISH || _mode === Z_SYNC_FLUSH))) {
+ if (this.options.to === 'string') {
+ this.onData(strings.buf2binstring(utils.shrinkBuf(strm.output, strm.next_out)));
+ } else {
+ this.onData(utils.shrinkBuf(strm.output, strm.next_out));
+ }
+ }
+ } while ((strm.avail_in > 0 || strm.avail_out === 0) && status !== Z_STREAM_END);
+
+ // Finalize on the last chunk.
+ if (_mode === Z_FINISH) {
+ status = zlib_deflate.deflateEnd(this.strm);
+ this.onEnd(status);
+ this.ended = true;
+ return status === Z_OK;
+ }
+
+ // callback interim results if Z_SYNC_FLUSH.
+ if (_mode === Z_SYNC_FLUSH) {
+ this.onEnd(Z_OK);
+ strm.avail_out = 0;
+ return true;
+ }
+
+ return true;
+};
+
+
+/**
+ * Deflate#onData(chunk) -> Void
+ * - chunk (Uint8Array|Array|String): output data. Type of array depends
+ * on js engine support. When string output requested, each chunk
+ * will be string.
+ *
+ * By default, stores data blocks in `chunks[]` property and glue
+ * those in `onEnd`. Override this handler, if you need another behaviour.
+ **/
+Deflate.prototype.onData = function (chunk) {
+ this.chunks.push(chunk);
+};
+
+
+/**
+ * Deflate#onEnd(status) -> Void
+ * - status (Number): deflate status. 0 (Z_OK) on success,
+ * other if not.
+ *
+ * Called once after you tell deflate that the input stream is
+ * complete (Z_FINISH) or should be flushed (Z_SYNC_FLUSH)
+ * or if an error happened. By default - join collected chunks,
+ * free memory and fill `results` / `err` properties.
+ **/
+Deflate.prototype.onEnd = function (status) {
+ // On success - join
+ if (status === Z_OK) {
+ if (this.options.to === 'string') {
+ this.result = this.chunks.join('');
+ } else {
+ this.result = utils.flattenChunks(this.chunks);
+ }
+ }
+ this.chunks = [];
+ this.err = status;
+ this.msg = this.strm.msg;
+};
+
+
+/**
+ * deflate(data[, options]) -> Uint8Array|Array|String
+ * - data (Uint8Array|Array|String): input data to compress.
+ * - options (Object): zlib deflate options.
+ *
+ * Compress `data` with deflate algorithm and `options`.
+ *
+ * Supported options are:
+ *
+ * - level
+ * - windowBits
+ * - memLevel
+ * - strategy
+ * - dictionary
+ *
+ * [http://zlib.net/manual.html#Advanced](http://zlib.net/manual.html#Advanced)
+ * for more information on these.
+ *
+ * Sugar (options):
+ *
+ * - `raw` (Boolean) - say that we work with raw stream, if you don't wish to specify
+ * negative windowBits implicitly.
+ * - `to` (String) - if equal to 'string', then result will be "binary string"
+ * (each char code [0..255])
+ *
+ * ##### Example:
+ *
+ * ```javascript
+ * var pako = require('pako')
+ * , data = Uint8Array([1,2,3,4,5,6,7,8,9]);
+ *
+ * console.log(pako.deflate(data));
+ * ```
+ **/
+function deflate(input, options) {
+ var deflator = new Deflate(options);
+
+ deflator.push(input, true);
+
+ // That will never happens, if you don't cheat with options :)
+ if (deflator.err) { throw deflator.msg || msg[deflator.err]; }
+
+ return deflator.result;
+}
+
+
+/**
+ * deflateRaw(data[, options]) -> Uint8Array|Array|String
+ * - data (Uint8Array|Array|String): input data to compress.
+ * - options (Object): zlib deflate options.
+ *
+ * The same as [[deflate]], but creates raw data, without wrapper
+ * (header and adler32 crc).
+ **/
+function deflateRaw(input, options) {
+ options = options || {};
+ options.raw = true;
+ return deflate(input, options);
+}
+
+
+/**
+ * gzip(data[, options]) -> Uint8Array|Array|String
+ * - data (Uint8Array|Array|String): input data to compress.
+ * - options (Object): zlib deflate options.
+ *
+ * The same as [[deflate]], but create gzip wrapper instead of
+ * deflate one.
+ **/
+function gzip(input, options) {
+ options = options || {};
+ options.gzip = true;
+ return deflate(input, options);
+}
+
+
+exports.Deflate = Deflate;
+exports.deflate = deflate;
+exports.deflateRaw = deflateRaw;
+exports.gzip = gzip;
+
+},{"./utils/common":3,"./utils/strings":4,"./zlib/deflate":8,"./zlib/messages":13,"./zlib/zstream":15}],2:[function(require,module,exports){
+'use strict';
+
+
+var zlib_inflate = require('./zlib/inflate');
+var utils = require('./utils/common');
+var strings = require('./utils/strings');
+var c = require('./zlib/constants');
+var msg = require('./zlib/messages');
+var ZStream = require('./zlib/zstream');
+var GZheader = require('./zlib/gzheader');
+
+var toString = Object.prototype.toString;
+
+/**
+ * class Inflate
+ *
+ * Generic JS-style wrapper for zlib calls. If you don't need
+ * streaming behaviour - use more simple functions: [[inflate]]
+ * and [[inflateRaw]].
+ **/
+
+/* internal
+ * inflate.chunks -> Array
+ *
+ * Chunks of output data, if [[Inflate#onData]] not overridden.
+ **/
+
+/**
+ * Inflate.result -> Uint8Array|Array|String
+ *
+ * Uncompressed result, generated by default [[Inflate#onData]]
+ * and [[Inflate#onEnd]] handlers. Filled after you push last chunk
+ * (call [[Inflate#push]] with `Z_FINISH` / `true` param) or if you
+ * push a chunk with explicit flush (call [[Inflate#push]] with
+ * `Z_SYNC_FLUSH` param).
+ **/
+
+/**
+ * Inflate.err -> Number
+ *
+ * Error code after inflate finished. 0 (Z_OK) on success.
+ * Should be checked if broken data possible.
+ **/
+
+/**
+ * Inflate.msg -> String
+ *
+ * Error message, if [[Inflate.err]] != 0
+ **/
+
+
+/**
+ * new Inflate(options)
+ * - options (Object): zlib inflate options.
+ *
+ * Creates new inflator instance with specified params. Throws exception
+ * on bad params. Supported options:
+ *
+ * - `windowBits`
+ * - `dictionary`
+ *
+ * [http://zlib.net/manual.html#Advanced](http://zlib.net/manual.html#Advanced)
+ * for more information on these.
+ *
+ * Additional options, for internal needs:
+ *
+ * - `chunkSize` - size of generated data chunks (16K by default)
+ * - `raw` (Boolean) - do raw inflate
+ * - `to` (String) - if equal to 'string', then result will be converted
+ * from utf8 to utf16 (javascript) string. When string output requested,
+ * chunk length can differ from `chunkSize`, depending on content.
+ *
+ * By default, when no options set, autodetect deflate/gzip data format via
+ * wrapper header.
+ *
+ * ##### Example:
+ *
+ * ```javascript
+ * var pako = require('pako')
+ * , chunk1 = Uint8Array([1,2,3,4,5,6,7,8,9])
+ * , chunk2 = Uint8Array([10,11,12,13,14,15,16,17,18,19]);
+ *
+ * var inflate = new pako.Inflate({ level: 3});
+ *
+ * inflate.push(chunk1, false);
+ * inflate.push(chunk2, true); // true -> last chunk
+ *
+ * if (inflate.err) { throw new Error(inflate.err); }
+ *
+ * console.log(inflate.result);
+ * ```
+ **/
+function Inflate(options) {
+ if (!(this instanceof Inflate)) return new Inflate(options);
+
+ this.options = utils.assign({
+ chunkSize: 16384,
+ windowBits: 0,
+ to: ''
+ }, options || {});
+
+ var opt = this.options;
+
+ // Force window size for `raw` data, if not set directly,
+ // because we have no header for autodetect.
+ if (opt.raw && (opt.windowBits >= 0) && (opt.windowBits < 16)) {
+ opt.windowBits = -opt.windowBits;
+ if (opt.windowBits === 0) { opt.windowBits = -15; }
+ }
+
+ // If `windowBits` not defined (and mode not raw) - set autodetect flag for gzip/deflate
+ if ((opt.windowBits >= 0) && (opt.windowBits < 16) &&
+ !(options && options.windowBits)) {
+ opt.windowBits += 32;
+ }
+
+ // Gzip header has no info about windows size, we can do autodetect only
+ // for deflate. So, if window size not set, force it to max when gzip possible
+ if ((opt.windowBits > 15) && (opt.windowBits < 48)) {
+ // bit 3 (16) -> gzipped data
+ // bit 4 (32) -> autodetect gzip/deflate
+ if ((opt.windowBits & 15) === 0) {
+ opt.windowBits |= 15;
+ }
+ }
+
+ this.err = 0; // error code, if happens (0 = Z_OK)
+ this.msg = ''; // error message
+ this.ended = false; // used to avoid multiple onEnd() calls
+ this.chunks = []; // chunks of compressed data
+
+ this.strm = new ZStream();
+ this.strm.avail_out = 0;
+
+ var status = zlib_inflate.inflateInit2(
+ this.strm,
+ opt.windowBits
+ );
+
+ if (status !== c.Z_OK) {
+ throw new Error(msg[status]);
+ }
+
+ this.header = new GZheader();
+
+ zlib_inflate.inflateGetHeader(this.strm, this.header);
+
+ // Setup dictionary
+ if (opt.dictionary) {
+ // Convert data if needed
+ if (typeof opt.dictionary === 'string') {
+ opt.dictionary = strings.string2buf(opt.dictionary);
+ } else if (toString.call(opt.dictionary) === '[object ArrayBuffer]') {
+ opt.dictionary = new Uint8Array(opt.dictionary);
+ }
+ if (opt.raw) { //In raw mode we need to set the dictionary early
+ status = zlib_inflate.inflateSetDictionary(this.strm, opt.dictionary);
+ if (status !== c.Z_OK) {
+ throw new Error(msg[status]);
+ }
+ }
+ }
+}
+
+/**
+ * Inflate#push(data[, mode]) -> Boolean
+ * - data (Uint8Array|Array|ArrayBuffer|String): input data
+ * - mode (Number|Boolean): 0..6 for corresponding Z_NO_FLUSH..Z_TREE modes.
+ * See constants. Skipped or `false` means Z_NO_FLUSH, `true` means Z_FINISH.
+ *
+ * Sends input data to inflate pipe, generating [[Inflate#onData]] calls with
+ * new output chunks. Returns `true` on success. The last data block must have
+ * mode Z_FINISH (or `true`). That will flush internal pending buffers and call
+ * [[Inflate#onEnd]]. For interim explicit flushes (without ending the stream) you
+ * can use mode Z_SYNC_FLUSH, keeping the decompression context.
+ *
+ * On fail call [[Inflate#onEnd]] with error code and return false.
+ *
+ * We strongly recommend to use `Uint8Array` on input for best speed (output
+ * format is detected automatically). Also, don't skip last param and always
+ * use the same type in your code (boolean or number). That will improve JS speed.
+ *
+ * For regular `Array`-s make sure all elements are [0..255].
+ *
+ * ##### Example
+ *
+ * ```javascript
+ * push(chunk, false); // push one of data chunks
+ * ...
+ * push(chunk, true); // push last chunk
+ * ```
+ **/
+Inflate.prototype.push = function (data, mode) {
+ var strm = this.strm;
+ var chunkSize = this.options.chunkSize;
+ var dictionary = this.options.dictionary;
+ var status, _mode;
+ var next_out_utf8, tail, utf8str;
+
+ // Flag to properly process Z_BUF_ERROR on testing inflate call
+ // when we check that all output data was flushed.
+ var allowBufError = false;
+
+ if (this.ended) { return false; }
+ _mode = (mode === ~~mode) ? mode : ((mode === true) ? c.Z_FINISH : c.Z_NO_FLUSH);
+
+ // Convert data if needed
+ if (typeof data === 'string') {
+ // Only binary strings can be decompressed on practice
+ strm.input = strings.binstring2buf(data);
+ } else if (toString.call(data) === '[object ArrayBuffer]') {
+ strm.input = new Uint8Array(data);
+ } else {
+ strm.input = data;
+ }
+
+ strm.next_in = 0;
+ strm.avail_in = strm.input.length;
+
+ do {
+ if (strm.avail_out === 0) {
+ strm.output = new utils.Buf8(chunkSize);
+ strm.next_out = 0;
+ strm.avail_out = chunkSize;
+ }
+
+ status = zlib_inflate.inflate(strm, c.Z_NO_FLUSH); /* no bad return value */
+
+ if (status === c.Z_NEED_DICT && dictionary) {
+ status = zlib_inflate.inflateSetDictionary(this.strm, dictionary);
+ }
+
+ if (status === c.Z_BUF_ERROR && allowBufError === true) {
+ status = c.Z_OK;
+ allowBufError = false;
+ }
+
+ if (status !== c.Z_STREAM_END && status !== c.Z_OK) {
+ this.onEnd(status);
+ this.ended = true;
+ return false;
+ }
+
+ if (strm.next_out) {
+ if (strm.avail_out === 0 || status === c.Z_STREAM_END || (strm.avail_in === 0 && (_mode === c.Z_FINISH || _mode === c.Z_SYNC_FLUSH))) {
+
+ if (this.options.to === 'string') {
+
+ next_out_utf8 = strings.utf8border(strm.output, strm.next_out);
+
+ tail = strm.next_out - next_out_utf8;
+ utf8str = strings.buf2string(strm.output, next_out_utf8);
+
+ // move tail
+ strm.next_out = tail;
+ strm.avail_out = chunkSize - tail;
+ if (tail) { utils.arraySet(strm.output, strm.output, next_out_utf8, tail, 0); }
+
+ this.onData(utf8str);
+
+ } else {
+ this.onData(utils.shrinkBuf(strm.output, strm.next_out));
+ }
+ }
+ }
+
+ // When no more input data, we should check that internal inflate buffers
+ // are flushed. The only way to do it when avail_out = 0 - run one more
+ // inflate pass. But if output data not exists, inflate return Z_BUF_ERROR.
+ // Here we set flag to process this error properly.
+ //
+ // NOTE. Deflate does not return error in this case and does not needs such
+ // logic.
+ if (strm.avail_in === 0 && strm.avail_out === 0) {
+ allowBufError = true;
+ }
+
+ } while ((strm.avail_in > 0 || strm.avail_out === 0) && status !== c.Z_STREAM_END);
+
+ if (status === c.Z_STREAM_END) {
+ _mode = c.Z_FINISH;
+ }
+
+ // Finalize on the last chunk.
+ if (_mode === c.Z_FINISH) {
+ status = zlib_inflate.inflateEnd(this.strm);
+ this.onEnd(status);
+ this.ended = true;
+ return status === c.Z_OK;
+ }
+
+ // callback interim results if Z_SYNC_FLUSH.
+ if (_mode === c.Z_SYNC_FLUSH) {
+ this.onEnd(c.Z_OK);
+ strm.avail_out = 0;
+ return true;
+ }
+
+ return true;
+};
+
+
+/**
+ * Inflate#onData(chunk) -> Void
+ * - chunk (Uint8Array|Array|String): output data. Type of array depends
+ * on js engine support. When string output requested, each chunk
+ * will be string.
+ *
+ * By default, stores data blocks in `chunks[]` property and glue
+ * those in `onEnd`. Override this handler, if you need another behaviour.
+ **/
+Inflate.prototype.onData = function (chunk) {
+ this.chunks.push(chunk);
+};
+
+
+/**
+ * Inflate#onEnd(status) -> Void
+ * - status (Number): inflate status. 0 (Z_OK) on success,
+ * other if not.
+ *
+ * Called either after you tell inflate that the input stream is
+ * complete (Z_FINISH) or should be flushed (Z_SYNC_FLUSH)
+ * or if an error happened. By default - join collected chunks,
+ * free memory and fill `results` / `err` properties.
+ **/
+Inflate.prototype.onEnd = function (status) {
+ // On success - join
+ if (status === c.Z_OK) {
+ if (this.options.to === 'string') {
+ // Glue & convert here, until we teach pako to send
+ // utf8 aligned strings to onData
+ this.result = this.chunks.join('');
+ } else {
+ this.result = utils.flattenChunks(this.chunks);
+ }
+ }
+ this.chunks = [];
+ this.err = status;
+ this.msg = this.strm.msg;
+};
+
+
+/**
+ * inflate(data[, options]) -> Uint8Array|Array|String
+ * - data (Uint8Array|Array|String): input data to decompress.
+ * - options (Object): zlib inflate options.
+ *
+ * Decompress `data` with inflate/ungzip and `options`. Autodetect
+ * format via wrapper header by default. That's why we don't provide
+ * separate `ungzip` method.
+ *
+ * Supported options are:
+ *
+ * - windowBits
+ *
+ * [http://zlib.net/manual.html#Advanced](http://zlib.net/manual.html#Advanced)
+ * for more information.
+ *
+ * Sugar (options):
+ *
+ * - `raw` (Boolean) - say that we work with raw stream, if you don't wish to specify
+ * negative windowBits implicitly.
+ * - `to` (String) - if equal to 'string', then result will be converted
+ * from utf8 to utf16 (javascript) string. When string output requested,
+ * chunk length can differ from `chunkSize`, depending on content.
+ *
+ *
+ * ##### Example:
+ *
+ * ```javascript
+ * var pako = require('pako')
+ * , input = pako.deflate([1,2,3,4,5,6,7,8,9])
+ * , output;
+ *
+ * try {
+ * output = pako.inflate(input);
+ * } catch (err)
+ * console.log(err);
+ * }
+ * ```
+ **/
+function inflate(input, options) {
+ var inflator = new Inflate(options);
+
+ inflator.push(input, true);
+
+ // That will never happens, if you don't cheat with options :)
+ if (inflator.err) { throw inflator.msg || msg[inflator.err]; }
+
+ return inflator.result;
+}
+
+
+/**
+ * inflateRaw(data[, options]) -> Uint8Array|Array|String
+ * - data (Uint8Array|Array|String): input data to decompress.
+ * - options (Object): zlib inflate options.
+ *
+ * The same as [[inflate]], but creates raw data, without wrapper
+ * (header and adler32 crc).
+ **/
+function inflateRaw(input, options) {
+ options = options || {};
+ options.raw = true;
+ return inflate(input, options);
+}
+
+
+/**
+ * ungzip(data[, options]) -> Uint8Array|Array|String
+ * - data (Uint8Array|Array|String): input data to decompress.
+ * - options (Object): zlib inflate options.
+ *
+ * Just shortcut to [[inflate]], because it autodetects format
+ * by header.content. Done for convenience.
+ **/
+
+
+exports.Inflate = Inflate;
+exports.inflate = inflate;
+exports.inflateRaw = inflateRaw;
+exports.ungzip = inflate;
+
+},{"./utils/common":3,"./utils/strings":4,"./zlib/constants":6,"./zlib/gzheader":9,"./zlib/inflate":11,"./zlib/messages":13,"./zlib/zstream":15}],3:[function(require,module,exports){
+'use strict';
+
+
+var TYPED_OK = (typeof Uint8Array !== 'undefined') &&
+ (typeof Uint16Array !== 'undefined') &&
+ (typeof Int32Array !== 'undefined');
+
+function _has(obj, key) {
+ return Object.prototype.hasOwnProperty.call(obj, key);
+}
+
+exports.assign = function (obj /*from1, from2, from3, ...*/) {
+ var sources = Array.prototype.slice.call(arguments, 1);
+ while (sources.length) {
+ var source = sources.shift();
+ if (!source) { continue; }
+
+ if (typeof source !== 'object') {
+ throw new TypeError(source + 'must be non-object');
+ }
+
+ for (var p in source) {
+ if (_has(source, p)) {
+ obj[p] = source[p];
+ }
+ }
+ }
+
+ return obj;
+};
+
+
+// reduce buffer size, avoiding mem copy
+exports.shrinkBuf = function (buf, size) {
+ if (buf.length === size) { return buf; }
+ if (buf.subarray) { return buf.subarray(0, size); }
+ buf.length = size;
+ return buf;
+};
+
+
+var fnTyped = {
+ arraySet: function (dest, src, src_offs, len, dest_offs) {
+ if (src.subarray && dest.subarray) {
+ dest.set(src.subarray(src_offs, src_offs + len), dest_offs);
+ return;
+ }
+ // Fallback to ordinary array
+ for (var i = 0; i < len; i++) {
+ dest[dest_offs + i] = src[src_offs + i];
+ }
+ },
+ // Join array of chunks to single array.
+ flattenChunks: function (chunks) {
+ var i, l, len, pos, chunk, result;
+
+ // calculate data length
+ len = 0;
+ for (i = 0, l = chunks.length; i < l; i++) {
+ len += chunks[i].length;
+ }
+
+ // join chunks
+ result = new Uint8Array(len);
+ pos = 0;
+ for (i = 0, l = chunks.length; i < l; i++) {
+ chunk = chunks[i];
+ result.set(chunk, pos);
+ pos += chunk.length;
+ }
+
+ return result;
+ }
+};
+
+var fnUntyped = {
+ arraySet: function (dest, src, src_offs, len, dest_offs) {
+ for (var i = 0; i < len; i++) {
+ dest[dest_offs + i] = src[src_offs + i];
+ }
+ },
+ // Join array of chunks to single array.
+ flattenChunks: function (chunks) {
+ return [].concat.apply([], chunks);
+ }
+};
+
+
+// Enable/Disable typed arrays use, for testing
+//
+exports.setTyped = function (on) {
+ if (on) {
+ exports.Buf8 = Uint8Array;
+ exports.Buf16 = Uint16Array;
+ exports.Buf32 = Int32Array;
+ exports.assign(exports, fnTyped);
+ } else {
+ exports.Buf8 = Array;
+ exports.Buf16 = Array;
+ exports.Buf32 = Array;
+ exports.assign(exports, fnUntyped);
+ }
+};
+
+exports.setTyped(TYPED_OK);
+
+},{}],4:[function(require,module,exports){
+// String encode/decode helpers
+'use strict';
+
+
+var utils = require('./common');
+
+
+// Quick check if we can use fast array to bin string conversion
+//
+// - apply(Array) can fail on Android 2.2
+// - apply(Uint8Array) can fail on iOS 5.1 Safari
+//
+var STR_APPLY_OK = true;
+var STR_APPLY_UIA_OK = true;
+
+try { String.fromCharCode.apply(null, [ 0 ]); } catch (__) { STR_APPLY_OK = false; }
+try { String.fromCharCode.apply(null, new Uint8Array(1)); } catch (__) { STR_APPLY_UIA_OK = false; }
+
+
+// Table with utf8 lengths (calculated by first byte of sequence)
+// Note, that 5 & 6-byte values and some 4-byte values can not be represented in JS,
+// because max possible codepoint is 0x10ffff
+var _utf8len = new utils.Buf8(256);
+for (var q = 0; q < 256; q++) {
+ _utf8len[q] = (q >= 252 ? 6 : q >= 248 ? 5 : q >= 240 ? 4 : q >= 224 ? 3 : q >= 192 ? 2 : 1);
+}
+_utf8len[254] = _utf8len[254] = 1; // Invalid sequence start
+
+
+// convert string to array (typed, when possible)
+exports.string2buf = function (str) {
+ var buf, c, c2, m_pos, i, str_len = str.length, buf_len = 0;
+
+ // count binary size
+ for (m_pos = 0; m_pos < str_len; m_pos++) {
+ c = str.charCodeAt(m_pos);
+ if ((c & 0xfc00) === 0xd800 && (m_pos + 1 < str_len)) {
+ c2 = str.charCodeAt(m_pos + 1);
+ if ((c2 & 0xfc00) === 0xdc00) {
+ c = 0x10000 + ((c - 0xd800) << 10) + (c2 - 0xdc00);
+ m_pos++;
+ }
+ }
+ buf_len += c < 0x80 ? 1 : c < 0x800 ? 2 : c < 0x10000 ? 3 : 4;
+ }
+
+ // allocate buffer
+ buf = new utils.Buf8(buf_len);
+
+ // convert
+ for (i = 0, m_pos = 0; i < buf_len; m_pos++) {
+ c = str.charCodeAt(m_pos);
+ if ((c & 0xfc00) === 0xd800 && (m_pos + 1 < str_len)) {
+ c2 = str.charCodeAt(m_pos + 1);
+ if ((c2 & 0xfc00) === 0xdc00) {
+ c = 0x10000 + ((c - 0xd800) << 10) + (c2 - 0xdc00);
+ m_pos++;
+ }
+ }
+ if (c < 0x80) {
+ /* one byte */
+ buf[i++] = c;
+ } else if (c < 0x800) {
+ /* two bytes */
+ buf[i++] = 0xC0 | (c >>> 6);
+ buf[i++] = 0x80 | (c & 0x3f);
+ } else if (c < 0x10000) {
+ /* three bytes */
+ buf[i++] = 0xE0 | (c >>> 12);
+ buf[i++] = 0x80 | (c >>> 6 & 0x3f);
+ buf[i++] = 0x80 | (c & 0x3f);
+ } else {
+ /* four bytes */
+ buf[i++] = 0xf0 | (c >>> 18);
+ buf[i++] = 0x80 | (c >>> 12 & 0x3f);
+ buf[i++] = 0x80 | (c >>> 6 & 0x3f);
+ buf[i++] = 0x80 | (c & 0x3f);
+ }
+ }
+
+ return buf;
+};
+
+// Helper (used in 2 places)
+function buf2binstring(buf, len) {
+ // On Chrome, the arguments in a function call that are allowed is `65534`.
+ // If the length of the buffer is smaller than that, we can use this optimization,
+ // otherwise we will take a slower path.
+ if (len < 65534) {
+ if ((buf.subarray && STR_APPLY_UIA_OK) || (!buf.subarray && STR_APPLY_OK)) {
+ return String.fromCharCode.apply(null, utils.shrinkBuf(buf, len));
+ }
+ }
+
+ var result = '';
+ for (var i = 0; i < len; i++) {
+ result += String.fromCharCode(buf[i]);
+ }
+ return result;
+}
+
+
+// Convert byte array to binary string
+exports.buf2binstring = function (buf) {
+ return buf2binstring(buf, buf.length);
+};
+
+
+// Convert binary string (typed, when possible)
+exports.binstring2buf = function (str) {
+ var buf = new utils.Buf8(str.length);
+ for (var i = 0, len = buf.length; i < len; i++) {
+ buf[i] = str.charCodeAt(i);
+ }
+ return buf;
+};
+
+
+// convert array to string
+exports.buf2string = function (buf, max) {
+ var i, out, c, c_len;
+ var len = max || buf.length;
+
+ // Reserve max possible length (2 words per char)
+ // NB: by unknown reasons, Array is significantly faster for
+ // String.fromCharCode.apply than Uint16Array.
+ var utf16buf = new Array(len * 2);
+
+ for (out = 0, i = 0; i < len;) {
+ c = buf[i++];
+ // quick process ascii
+ if (c < 0x80) { utf16buf[out++] = c; continue; }
+
+ c_len = _utf8len[c];
+ // skip 5 & 6 byte codes
+ if (c_len > 4) { utf16buf[out++] = 0xfffd; i += c_len - 1; continue; }
+
+ // apply mask on first byte
+ c &= c_len === 2 ? 0x1f : c_len === 3 ? 0x0f : 0x07;
+ // join the rest
+ while (c_len > 1 && i < len) {
+ c = (c << 6) | (buf[i++] & 0x3f);
+ c_len--;
+ }
+
+ // terminated by end of string?
+ if (c_len > 1) { utf16buf[out++] = 0xfffd; continue; }
+
+ if (c < 0x10000) {
+ utf16buf[out++] = c;
+ } else {
+ c -= 0x10000;
+ utf16buf[out++] = 0xd800 | ((c >> 10) & 0x3ff);
+ utf16buf[out++] = 0xdc00 | (c & 0x3ff);
+ }
+ }
+
+ return buf2binstring(utf16buf, out);
+};
+
+
+// Calculate max possible position in utf8 buffer,
+// that will not break sequence. If that's not possible
+// - (very small limits) return max size as is.
+//
+// buf[] - utf8 bytes array
+// max - length limit (mandatory);
+exports.utf8border = function (buf, max) {
+ var pos;
+
+ max = max || buf.length;
+ if (max > buf.length) { max = buf.length; }
+
+ // go back from last position, until start of sequence found
+ pos = max - 1;
+ while (pos >= 0 && (buf[pos] & 0xC0) === 0x80) { pos--; }
+
+ // Very small and broken sequence,
+ // return max, because we should return something anyway.
+ if (pos < 0) { return max; }
+
+ // If we came to start of buffer - that means buffer is too small,
+ // return max too.
+ if (pos === 0) { return max; }
+
+ return (pos + _utf8len[buf[pos]] > max) ? pos : max;
+};
+
+},{"./common":3}],5:[function(require,module,exports){
+'use strict';
+
+// Note: adler32 takes 12% for level 0 and 2% for level 6.
+// It isn't worth it to make additional optimizations as in original.
+// Small size is preferable.
+
+// (C) 1995-2013 Jean-loup Gailly and Mark Adler
+// (C) 2014-2017 Vitaly Puzrin and Andrey Tupitsin
+//
+// This software is provided 'as-is', without any express or implied
+// warranty. In no event will the authors be held liable for any damages
+// arising from the use of this software.
+//
+// Permission is granted to anyone to use this software for any purpose,
+// including commercial applications, and to alter it and redistribute it
+// freely, subject to the following restrictions:
+//
+// 1. The origin of this software must not be misrepresented; you must not
+// claim that you wrote the original software. If you use this software
+// in a product, an acknowledgment in the product documentation would be
+// appreciated but is not required.
+// 2. Altered source versions must be plainly marked as such, and must not be
+// misrepresented as being the original software.
+// 3. This notice may not be removed or altered from any source distribution.
+
+function adler32(adler, buf, len, pos) {
+ var s1 = (adler & 0xffff) |0,
+ s2 = ((adler >>> 16) & 0xffff) |0,
+ n = 0;
+
+ while (len !== 0) {
+ // Set limit ~ twice less than 5552, to keep
+ // s2 in 31-bits, because we force signed ints.
+ // in other case %= will fail.
+ n = len > 2000 ? 2000 : len;
+ len -= n;
+
+ do {
+ s1 = (s1 + buf[pos++]) |0;
+ s2 = (s2 + s1) |0;
+ } while (--n);
+
+ s1 %= 65521;
+ s2 %= 65521;
+ }
+
+ return (s1 | (s2 << 16)) |0;
+}
+
+
+module.exports = adler32;
+
+},{}],6:[function(require,module,exports){
+'use strict';
+
+// (C) 1995-2013 Jean-loup Gailly and Mark Adler
+// (C) 2014-2017 Vitaly Puzrin and Andrey Tupitsin
+//
+// This software is provided 'as-is', without any express or implied
+// warranty. In no event will the authors be held liable for any damages
+// arising from the use of this software.
+//
+// Permission is granted to anyone to use this software for any purpose,
+// including commercial applications, and to alter it and redistribute it
+// freely, subject to the following restrictions:
+//
+// 1. The origin of this software must not be misrepresented; you must not
+// claim that you wrote the original software. If you use this software
+// in a product, an acknowledgment in the product documentation would be
+// appreciated but is not required.
+// 2. Altered source versions must be plainly marked as such, and must not be
+// misrepresented as being the original software.
+// 3. This notice may not be removed or altered from any source distribution.
+
+module.exports = {
+
+ /* Allowed flush values; see deflate() and inflate() below for details */
+ Z_NO_FLUSH: 0,
+ Z_PARTIAL_FLUSH: 1,
+ Z_SYNC_FLUSH: 2,
+ Z_FULL_FLUSH: 3,
+ Z_FINISH: 4,
+ Z_BLOCK: 5,
+ Z_TREES: 6,
+
+ /* Return codes for the compression/decompression functions. Negative values
+ * are errors, positive values are used for special but normal events.
+ */
+ Z_OK: 0,
+ Z_STREAM_END: 1,
+ Z_NEED_DICT: 2,
+ Z_ERRNO: -1,
+ Z_STREAM_ERROR: -2,
+ Z_DATA_ERROR: -3,
+ //Z_MEM_ERROR: -4,
+ Z_BUF_ERROR: -5,
+ //Z_VERSION_ERROR: -6,
+
+ /* compression levels */
+ Z_NO_COMPRESSION: 0,
+ Z_BEST_SPEED: 1,
+ Z_BEST_COMPRESSION: 9,
+ Z_DEFAULT_COMPRESSION: -1,
+
+
+ Z_FILTERED: 1,
+ Z_HUFFMAN_ONLY: 2,
+ Z_RLE: 3,
+ Z_FIXED: 4,
+ Z_DEFAULT_STRATEGY: 0,
+
+ /* Possible values of the data_type field (though see inflate()) */
+ Z_BINARY: 0,
+ Z_TEXT: 1,
+ //Z_ASCII: 1, // = Z_TEXT (deprecated)
+ Z_UNKNOWN: 2,
+
+ /* The deflate compression method */
+ Z_DEFLATED: 8
+ //Z_NULL: null // Use -1 or null inline, depending on var type
+};
+
+},{}],7:[function(require,module,exports){
+'use strict';
+
+// Note: we can't get significant speed boost here.
+// So write code to minimize size - no pregenerated tables
+// and array tools dependencies.
+
+// (C) 1995-2013 Jean-loup Gailly and Mark Adler
+// (C) 2014-2017 Vitaly Puzrin and Andrey Tupitsin
+//
+// This software is provided 'as-is', without any express or implied
+// warranty. In no event will the authors be held liable for any damages
+// arising from the use of this software.
+//
+// Permission is granted to anyone to use this software for any purpose,
+// including commercial applications, and to alter it and redistribute it
+// freely, subject to the following restrictions:
+//
+// 1. The origin of this software must not be misrepresented; you must not
+// claim that you wrote the original software. If you use this software
+// in a product, an acknowledgment in the product documentation would be
+// appreciated but is not required.
+// 2. Altered source versions must be plainly marked as such, and must not be
+// misrepresented as being the original software.
+// 3. This notice may not be removed or altered from any source distribution.
+
+// Use ordinary array, since untyped makes no boost here
+function makeTable() {
+ var c, table = [];
+
+ for (var n = 0; n < 256; n++) {
+ c = n;
+ for (var k = 0; k < 8; k++) {
+ c = ((c & 1) ? (0xEDB88320 ^ (c >>> 1)) : (c >>> 1));
+ }
+ table[n] = c;
+ }
+
+ return table;
+}
+
+// Create table on load. Just 255 signed longs. Not a problem.
+var crcTable = makeTable();
+
+
+function crc32(crc, buf, len, pos) {
+ var t = crcTable,
+ end = pos + len;
+
+ crc ^= -1;
+
+ for (var i = pos; i < end; i++) {
+ crc = (crc >>> 8) ^ t[(crc ^ buf[i]) & 0xFF];
+ }
+
+ return (crc ^ (-1)); // >>> 0;
+}
+
+
+module.exports = crc32;
+
+},{}],8:[function(require,module,exports){
+'use strict';
+
+// (C) 1995-2013 Jean-loup Gailly and Mark Adler
+// (C) 2014-2017 Vitaly Puzrin and Andrey Tupitsin
+//
+// This software is provided 'as-is', without any express or implied
+// warranty. In no event will the authors be held liable for any damages
+// arising from the use of this software.
+//
+// Permission is granted to anyone to use this software for any purpose,
+// including commercial applications, and to alter it and redistribute it
+// freely, subject to the following restrictions:
+//
+// 1. The origin of this software must not be misrepresented; you must not
+// claim that you wrote the original software. If you use this software
+// in a product, an acknowledgment in the product documentation would be
+// appreciated but is not required.
+// 2. Altered source versions must be plainly marked as such, and must not be
+// misrepresented as being the original software.
+// 3. This notice may not be removed or altered from any source distribution.
+
+var utils = require('../utils/common');
+var trees = require('./trees');
+var adler32 = require('./adler32');
+var crc32 = require('./crc32');
+var msg = require('./messages');
+
+/* Public constants ==========================================================*/
+/* ===========================================================================*/
+
+
+/* Allowed flush values; see deflate() and inflate() below for details */
+var Z_NO_FLUSH = 0;
+var Z_PARTIAL_FLUSH = 1;
+//var Z_SYNC_FLUSH = 2;
+var Z_FULL_FLUSH = 3;
+var Z_FINISH = 4;
+var Z_BLOCK = 5;
+//var Z_TREES = 6;
+
+
+/* Return codes for the compression/decompression functions. Negative values
+ * are errors, positive values are used for special but normal events.
+ */
+var Z_OK = 0;
+var Z_STREAM_END = 1;
+//var Z_NEED_DICT = 2;
+//var Z_ERRNO = -1;
+var Z_STREAM_ERROR = -2;
+var Z_DATA_ERROR = -3;
+//var Z_MEM_ERROR = -4;
+var Z_BUF_ERROR = -5;
+//var Z_VERSION_ERROR = -6;
+
+
+/* compression levels */
+//var Z_NO_COMPRESSION = 0;
+//var Z_BEST_SPEED = 1;
+//var Z_BEST_COMPRESSION = 9;
+var Z_DEFAULT_COMPRESSION = -1;
+
+
+var Z_FILTERED = 1;
+var Z_HUFFMAN_ONLY = 2;
+var Z_RLE = 3;
+var Z_FIXED = 4;
+var Z_DEFAULT_STRATEGY = 0;
+
+/* Possible values of the data_type field (though see inflate()) */
+//var Z_BINARY = 0;
+//var Z_TEXT = 1;
+//var Z_ASCII = 1; // = Z_TEXT
+var Z_UNKNOWN = 2;
+
+
+/* The deflate compression method */
+var Z_DEFLATED = 8;
+
+/*============================================================================*/
+
+
+var MAX_MEM_LEVEL = 9;
+/* Maximum value for memLevel in deflateInit2 */
+var MAX_WBITS = 15;
+/* 32K LZ77 window */
+var DEF_MEM_LEVEL = 8;
+
+
+var LENGTH_CODES = 29;
+/* number of length codes, not counting the special END_BLOCK code */
+var LITERALS = 256;
+/* number of literal bytes 0..255 */
+var L_CODES = LITERALS + 1 + LENGTH_CODES;
+/* number of Literal or Length codes, including the END_BLOCK code */
+var D_CODES = 30;
+/* number of distance codes */
+var BL_CODES = 19;
+/* number of codes used to transfer the bit lengths */
+var HEAP_SIZE = 2 * L_CODES + 1;
+/* maximum heap size */
+var MAX_BITS = 15;
+/* All codes must not exceed MAX_BITS bits */
+
+var MIN_MATCH = 3;
+var MAX_MATCH = 258;
+var MIN_LOOKAHEAD = (MAX_MATCH + MIN_MATCH + 1);
+
+var PRESET_DICT = 0x20;
+
+var INIT_STATE = 42;
+var EXTRA_STATE = 69;
+var NAME_STATE = 73;
+var COMMENT_STATE = 91;
+var HCRC_STATE = 103;
+var BUSY_STATE = 113;
+var FINISH_STATE = 666;
+
+var BS_NEED_MORE = 1; /* block not completed, need more input or more output */
+var BS_BLOCK_DONE = 2; /* block flush performed */
+var BS_FINISH_STARTED = 3; /* finish started, need only more output at next deflate */
+var BS_FINISH_DONE = 4; /* finish done, accept no more input or output */
+
+var OS_CODE = 0x03; // Unix :) . Don't detect, use this default.
+
+function err(strm, errorCode) {
+ strm.msg = msg[errorCode];
+ return errorCode;
+}
+
+function rank(f) {
+ return ((f) << 1) - ((f) > 4 ? 9 : 0);
+}
+
+function zero(buf) { var len = buf.length; while (--len >= 0) { buf[len] = 0; } }
+
+
+/* =========================================================================
+ * Flush as much pending output as possible. All deflate() output goes
+ * through this function so some applications may wish to modify it
+ * to avoid allocating a large strm->output buffer and copying into it.
+ * (See also read_buf()).
+ */
+function flush_pending(strm) {
+ var s = strm.state;
+
+ //_tr_flush_bits(s);
+ var len = s.pending;
+ if (len > strm.avail_out) {
+ len = strm.avail_out;
+ }
+ if (len === 0) { return; }
+
+ utils.arraySet(strm.output, s.pending_buf, s.pending_out, len, strm.next_out);
+ strm.next_out += len;
+ s.pending_out += len;
+ strm.total_out += len;
+ strm.avail_out -= len;
+ s.pending -= len;
+ if (s.pending === 0) {
+ s.pending_out = 0;
+ }
+}
+
+
+function flush_block_only(s, last) {
+ trees._tr_flush_block(s, (s.block_start >= 0 ? s.block_start : -1), s.strstart - s.block_start, last);
+ s.block_start = s.strstart;
+ flush_pending(s.strm);
+}
+
+
+function put_byte(s, b) {
+ s.pending_buf[s.pending++] = b;
+}
+
+
+/* =========================================================================
+ * Put a short in the pending buffer. The 16-bit value is put in MSB order.
+ * IN assertion: the stream state is correct and there is enough room in
+ * pending_buf.
+ */
+function putShortMSB(s, b) {
+// put_byte(s, (Byte)(b >> 8));
+// put_byte(s, (Byte)(b & 0xff));
+ s.pending_buf[s.pending++] = (b >>> 8) & 0xff;
+ s.pending_buf[s.pending++] = b & 0xff;
+}
+
+
+/* ===========================================================================
+ * Read a new buffer from the current input stream, update the adler32
+ * and total number of bytes read. All deflate() input goes through
+ * this function so some applications may wish to modify it to avoid
+ * allocating a large strm->input buffer and copying from it.
+ * (See also flush_pending()).
+ */
+function read_buf(strm, buf, start, size) {
+ var len = strm.avail_in;
+
+ if (len > size) { len = size; }
+ if (len === 0) { return 0; }
+
+ strm.avail_in -= len;
+
+ // zmemcpy(buf, strm->next_in, len);
+ utils.arraySet(buf, strm.input, strm.next_in, len, start);
+ if (strm.state.wrap === 1) {
+ strm.adler = adler32(strm.adler, buf, len, start);
+ }
+
+ else if (strm.state.wrap === 2) {
+ strm.adler = crc32(strm.adler, buf, len, start);
+ }
+
+ strm.next_in += len;
+ strm.total_in += len;
+
+ return len;
+}
+
+
+/* ===========================================================================
+ * Set match_start to the longest match starting at the given string and
+ * return its length. Matches shorter or equal to prev_length are discarded,
+ * in which case the result is equal to prev_length and match_start is
+ * garbage.
+ * IN assertions: cur_match is the head of the hash chain for the current
+ * string (strstart) and its distance is <= MAX_DIST, and prev_length >= 1
+ * OUT assertion: the match length is not greater than s->lookahead.
+ */
+function longest_match(s, cur_match) {
+ var chain_length = s.max_chain_length; /* max hash chain length */
+ var scan = s.strstart; /* current string */
+ var match; /* matched string */
+ var len; /* length of current match */
+ var best_len = s.prev_length; /* best match length so far */
+ var nice_match = s.nice_match; /* stop if match long enough */
+ var limit = (s.strstart > (s.w_size - MIN_LOOKAHEAD)) ?
+ s.strstart - (s.w_size - MIN_LOOKAHEAD) : 0/*NIL*/;
+
+ var _win = s.window; // shortcut
+
+ var wmask = s.w_mask;
+ var prev = s.prev;
+
+ /* Stop when cur_match becomes <= limit. To simplify the code,
+ * we prevent matches with the string of window index 0.
+ */
+
+ var strend = s.strstart + MAX_MATCH;
+ var scan_end1 = _win[scan + best_len - 1];
+ var scan_end = _win[scan + best_len];
+
+ /* The code is optimized for HASH_BITS >= 8 and MAX_MATCH-2 multiple of 16.
+ * It is easy to get rid of this optimization if necessary.
+ */
+ // Assert(s->hash_bits >= 8 && MAX_MATCH == 258, "Code too clever");
+
+ /* Do not waste too much time if we already have a good match: */
+ if (s.prev_length >= s.good_match) {
+ chain_length >>= 2;
+ }
+ /* Do not look for matches beyond the end of the input. This is necessary
+ * to make deflate deterministic.
+ */
+ if (nice_match > s.lookahead) { nice_match = s.lookahead; }
+
+ // Assert((ulg)s->strstart <= s->window_size-MIN_LOOKAHEAD, "need lookahead");
+
+ do {
+ // Assert(cur_match < s->strstart, "no future");
+ match = cur_match;
+
+ /* Skip to next match if the match length cannot increase
+ * or if the match length is less than 2. Note that the checks below
+ * for insufficient lookahead only occur occasionally for performance
+ * reasons. Therefore uninitialized memory will be accessed, and
+ * conditional jumps will be made that depend on those values.
+ * However the length of the match is limited to the lookahead, so
+ * the output of deflate is not affected by the uninitialized values.
+ */
+
+ if (_win[match + best_len] !== scan_end ||
+ _win[match + best_len - 1] !== scan_end1 ||
+ _win[match] !== _win[scan] ||
+ _win[++match] !== _win[scan + 1]) {
+ continue;
+ }
+
+ /* The check at best_len-1 can be removed because it will be made
+ * again later. (This heuristic is not always a win.)
+ * It is not necessary to compare scan[2] and match[2] since they
+ * are always equal when the other bytes match, given that
+ * the hash keys are equal and that HASH_BITS >= 8.
+ */
+ scan += 2;
+ match++;
+ // Assert(*scan == *match, "match[2]?");
+
+ /* We check for insufficient lookahead only every 8th comparison;
+ * the 256th check will be made at strstart+258.
+ */
+ do {
+ /*jshint noempty:false*/
+ } while (_win[++scan] === _win[++match] && _win[++scan] === _win[++match] &&
+ _win[++scan] === _win[++match] && _win[++scan] === _win[++match] &&
+ _win[++scan] === _win[++match] && _win[++scan] === _win[++match] &&
+ _win[++scan] === _win[++match] && _win[++scan] === _win[++match] &&
+ scan < strend);
+
+ // Assert(scan <= s->window+(unsigned)(s->window_size-1), "wild scan");
+
+ len = MAX_MATCH - (strend - scan);
+ scan = strend - MAX_MATCH;
+
+ if (len > best_len) {
+ s.match_start = cur_match;
+ best_len = len;
+ if (len >= nice_match) {
+ break;
+ }
+ scan_end1 = _win[scan + best_len - 1];
+ scan_end = _win[scan + best_len];
+ }
+ } while ((cur_match = prev[cur_match & wmask]) > limit && --chain_length !== 0);
+
+ if (best_len <= s.lookahead) {
+ return best_len;
+ }
+ return s.lookahead;
+}
+
+
+/* ===========================================================================
+ * Fill the window when the lookahead becomes insufficient.
+ * Updates strstart and lookahead.
+ *
+ * IN assertion: lookahead < MIN_LOOKAHEAD
+ * OUT assertions: strstart <= window_size-MIN_LOOKAHEAD
+ * At least one byte has been read, or avail_in == 0; reads are
+ * performed for at least two bytes (required for the zip translate_eol
+ * option -- not supported here).
+ */
+function fill_window(s) {
+ var _w_size = s.w_size;
+ var p, n, m, more, str;
+
+ //Assert(s->lookahead < MIN_LOOKAHEAD, "already enough lookahead");
+
+ do {
+ more = s.window_size - s.lookahead - s.strstart;
+
+ // JS ints have 32 bit, block below not needed
+ /* Deal with !@#$% 64K limit: */
+ //if (sizeof(int) <= 2) {
+ // if (more == 0 && s->strstart == 0 && s->lookahead == 0) {
+ // more = wsize;
+ //
+ // } else if (more == (unsigned)(-1)) {
+ // /* Very unlikely, but possible on 16 bit machine if
+ // * strstart == 0 && lookahead == 1 (input done a byte at time)
+ // */
+ // more--;
+ // }
+ //}
+
+
+ /* If the window is almost full and there is insufficient lookahead,
+ * move the upper half to the lower one to make room in the upper half.
+ */
+ if (s.strstart >= _w_size + (_w_size - MIN_LOOKAHEAD)) {
+
+ utils.arraySet(s.window, s.window, _w_size, _w_size, 0);
+ s.match_start -= _w_size;
+ s.strstart -= _w_size;
+ /* we now have strstart >= MAX_DIST */
+ s.block_start -= _w_size;
+
+ /* Slide the hash table (could be avoided with 32 bit values
+ at the expense of memory usage). We slide even when level == 0
+ to keep the hash table consistent if we switch back to level > 0
+ later. (Using level 0 permanently is not an optimal usage of
+ zlib, so we don't care about this pathological case.)
+ */
+
+ n = s.hash_size;
+ p = n;
+ do {
+ m = s.head[--p];
+ s.head[p] = (m >= _w_size ? m - _w_size : 0);
+ } while (--n);
+
+ n = _w_size;
+ p = n;
+ do {
+ m = s.prev[--p];
+ s.prev[p] = (m >= _w_size ? m - _w_size : 0);
+ /* If n is not on any hash chain, prev[n] is garbage but
+ * its value will never be used.
+ */
+ } while (--n);
+
+ more += _w_size;
+ }
+ if (s.strm.avail_in === 0) {
+ break;
+ }
+
+ /* If there was no sliding:
+ * strstart <= WSIZE+MAX_DIST-1 && lookahead <= MIN_LOOKAHEAD - 1 &&
+ * more == window_size - lookahead - strstart
+ * => more >= window_size - (MIN_LOOKAHEAD-1 + WSIZE + MAX_DIST-1)
+ * => more >= window_size - 2*WSIZE + 2
+ * In the BIG_MEM or MMAP case (not yet supported),
+ * window_size == input_size + MIN_LOOKAHEAD &&
+ * strstart + s->lookahead <= input_size => more >= MIN_LOOKAHEAD.
+ * Otherwise, window_size == 2*WSIZE so more >= 2.
+ * If there was sliding, more >= WSIZE. So in all cases, more >= 2.
+ */
+ //Assert(more >= 2, "more < 2");
+ n = read_buf(s.strm, s.window, s.strstart + s.lookahead, more);
+ s.lookahead += n;
+
+ /* Initialize the hash value now that we have some input: */
+ if (s.lookahead + s.insert >= MIN_MATCH) {
+ str = s.strstart - s.insert;
+ s.ins_h = s.window[str];
+
+ /* UPDATE_HASH(s, s->ins_h, s->window[str + 1]); */
+ s.ins_h = ((s.ins_h << s.hash_shift) ^ s.window[str + 1]) & s.hash_mask;
+//#if MIN_MATCH != 3
+// Call update_hash() MIN_MATCH-3 more times
+//#endif
+ while (s.insert) {
+ /* UPDATE_HASH(s, s->ins_h, s->window[str + MIN_MATCH-1]); */
+ s.ins_h = ((s.ins_h << s.hash_shift) ^ s.window[str + MIN_MATCH - 1]) & s.hash_mask;
+
+ s.prev[str & s.w_mask] = s.head[s.ins_h];
+ s.head[s.ins_h] = str;
+ str++;
+ s.insert--;
+ if (s.lookahead + s.insert < MIN_MATCH) {
+ break;
+ }
+ }
+ }
+ /* If the whole input has less than MIN_MATCH bytes, ins_h is garbage,
+ * but this is not important since only literal bytes will be emitted.
+ */
+
+ } while (s.lookahead < MIN_LOOKAHEAD && s.strm.avail_in !== 0);
+
+ /* If the WIN_INIT bytes after the end of the current data have never been
+ * written, then zero those bytes in order to avoid memory check reports of
+ * the use of uninitialized (or uninitialised as Julian writes) bytes by
+ * the longest match routines. Update the high water mark for the next
+ * time through here. WIN_INIT is set to MAX_MATCH since the longest match
+ * routines allow scanning to strstart + MAX_MATCH, ignoring lookahead.
+ */
+// if (s.high_water < s.window_size) {
+// var curr = s.strstart + s.lookahead;
+// var init = 0;
+//
+// if (s.high_water < curr) {
+// /* Previous high water mark below current data -- zero WIN_INIT
+// * bytes or up to end of window, whichever is less.
+// */
+// init = s.window_size - curr;
+// if (init > WIN_INIT)
+// init = WIN_INIT;
+// zmemzero(s->window + curr, (unsigned)init);
+// s->high_water = curr + init;
+// }
+// else if (s->high_water < (ulg)curr + WIN_INIT) {
+// /* High water mark at or above current data, but below current data
+// * plus WIN_INIT -- zero out to current data plus WIN_INIT, or up
+// * to end of window, whichever is less.
+// */
+// init = (ulg)curr + WIN_INIT - s->high_water;
+// if (init > s->window_size - s->high_water)
+// init = s->window_size - s->high_water;
+// zmemzero(s->window + s->high_water, (unsigned)init);
+// s->high_water += init;
+// }
+// }
+//
+// Assert((ulg)s->strstart <= s->window_size - MIN_LOOKAHEAD,
+// "not enough room for search");
+}
+
+/* ===========================================================================
+ * Copy without compression as much as possible from the input stream, return
+ * the current block state.
+ * This function does not insert new strings in the dictionary since
+ * uncompressible data is probably not useful. This function is used
+ * only for the level=0 compression option.
+ * NOTE: this function should be optimized to avoid extra copying from
+ * window to pending_buf.
+ */
+function deflate_stored(s, flush) {
+ /* Stored blocks are limited to 0xffff bytes, pending_buf is limited
+ * to pending_buf_size, and each stored block has a 5 byte header:
+ */
+ var max_block_size = 0xffff;
+
+ if (max_block_size > s.pending_buf_size - 5) {
+ max_block_size = s.pending_buf_size - 5;
+ }
+
+ /* Copy as much as possible from input to output: */
+ for (;;) {
+ /* Fill the window as much as possible: */
+ if (s.lookahead <= 1) {
+
+ //Assert(s->strstart < s->w_size+MAX_DIST(s) ||
+ // s->block_start >= (long)s->w_size, "slide too late");
+// if (!(s.strstart < s.w_size + (s.w_size - MIN_LOOKAHEAD) ||
+// s.block_start >= s.w_size)) {
+// throw new Error("slide too late");
+// }
+
+ fill_window(s);
+ if (s.lookahead === 0 && flush === Z_NO_FLUSH) {
+ return BS_NEED_MORE;
+ }
+
+ if (s.lookahead === 0) {
+ break;
+ }
+ /* flush the current block */
+ }
+ //Assert(s->block_start >= 0L, "block gone");
+// if (s.block_start < 0) throw new Error("block gone");
+
+ s.strstart += s.lookahead;
+ s.lookahead = 0;
+
+ /* Emit a stored block if pending_buf will be full: */
+ var max_start = s.block_start + max_block_size;
+
+ if (s.strstart === 0 || s.strstart >= max_start) {
+ /* strstart == 0 is possible when wraparound on 16-bit machine */
+ s.lookahead = s.strstart - max_start;
+ s.strstart = max_start;
+ /*** FLUSH_BLOCK(s, 0); ***/
+ flush_block_only(s, false);
+ if (s.strm.avail_out === 0) {
+ return BS_NEED_MORE;
+ }
+ /***/
+
+
+ }
+ /* Flush if we may have to slide, otherwise block_start may become
+ * negative and the data will be gone:
+ */
+ if (s.strstart - s.block_start >= (s.w_size - MIN_LOOKAHEAD)) {
+ /*** FLUSH_BLOCK(s, 0); ***/
+ flush_block_only(s, false);
+ if (s.strm.avail_out === 0) {
+ return BS_NEED_MORE;
+ }
+ /***/
+ }
+ }
+
+ s.insert = 0;
+
+ if (flush === Z_FINISH) {
+ /*** FLUSH_BLOCK(s, 1); ***/
+ flush_block_only(s, true);
+ if (s.strm.avail_out === 0) {
+ return BS_FINISH_STARTED;
+ }
+ /***/
+ return BS_FINISH_DONE;
+ }
+
+ if (s.strstart > s.block_start) {
+ /*** FLUSH_BLOCK(s, 0); ***/
+ flush_block_only(s, false);
+ if (s.strm.avail_out === 0) {
+ return BS_NEED_MORE;
+ }
+ /***/
+ }
+
+ return BS_NEED_MORE;
+}
+
+/* ===========================================================================
+ * Compress as much as possible from the input stream, return the current
+ * block state.
+ * This function does not perform lazy evaluation of matches and inserts
+ * new strings in the dictionary only for unmatched strings or for short
+ * matches. It is used only for the fast compression options.
+ */
+function deflate_fast(s, flush) {
+ var hash_head; /* head of the hash chain */
+ var bflush; /* set if current block must be flushed */
+
+ for (;;) {
+ /* Make sure that we always have enough lookahead, except
+ * at the end of the input file. We need MAX_MATCH bytes
+ * for the next match, plus MIN_MATCH bytes to insert the
+ * string following the next match.
+ */
+ if (s.lookahead < MIN_LOOKAHEAD) {
+ fill_window(s);
+ if (s.lookahead < MIN_LOOKAHEAD && flush === Z_NO_FLUSH) {
+ return BS_NEED_MORE;
+ }
+ if (s.lookahead === 0) {
+ break; /* flush the current block */
+ }
+ }
+
+ /* Insert the string window[strstart .. strstart+2] in the
+ * dictionary, and set hash_head to the head of the hash chain:
+ */
+ hash_head = 0/*NIL*/;
+ if (s.lookahead >= MIN_MATCH) {
+ /*** INSERT_STRING(s, s.strstart, hash_head); ***/
+ s.ins_h = ((s.ins_h << s.hash_shift) ^ s.window[s.strstart + MIN_MATCH - 1]) & s.hash_mask;
+ hash_head = s.prev[s.strstart & s.w_mask] = s.head[s.ins_h];
+ s.head[s.ins_h] = s.strstart;
+ /***/
+ }
+
+ /* Find the longest match, discarding those <= prev_length.
+ * At this point we have always match_length < MIN_MATCH
+ */
+ if (hash_head !== 0/*NIL*/ && ((s.strstart - hash_head) <= (s.w_size - MIN_LOOKAHEAD))) {
+ /* To simplify the code, we prevent matches with the string
+ * of window index 0 (in particular we have to avoid a match
+ * of the string with itself at the start of the input file).
+ */
+ s.match_length = longest_match(s, hash_head);
+ /* longest_match() sets match_start */
+ }
+ if (s.match_length >= MIN_MATCH) {
+ // check_match(s, s.strstart, s.match_start, s.match_length); // for debug only
+
+ /*** _tr_tally_dist(s, s.strstart - s.match_start,
+ s.match_length - MIN_MATCH, bflush); ***/
+ bflush = trees._tr_tally(s, s.strstart - s.match_start, s.match_length - MIN_MATCH);
+
+ s.lookahead -= s.match_length;
+
+ /* Insert new strings in the hash table only if the match length
+ * is not too large. This saves time but degrades compression.
+ */
+ if (s.match_length <= s.max_lazy_match/*max_insert_length*/ && s.lookahead >= MIN_MATCH) {
+ s.match_length--; /* string at strstart already in table */
+ do {
+ s.strstart++;
+ /*** INSERT_STRING(s, s.strstart, hash_head); ***/
+ s.ins_h = ((s.ins_h << s.hash_shift) ^ s.window[s.strstart + MIN_MATCH - 1]) & s.hash_mask;
+ hash_head = s.prev[s.strstart & s.w_mask] = s.head[s.ins_h];
+ s.head[s.ins_h] = s.strstart;
+ /***/
+ /* strstart never exceeds WSIZE-MAX_MATCH, so there are
+ * always MIN_MATCH bytes ahead.
+ */
+ } while (--s.match_length !== 0);
+ s.strstart++;
+ } else
+ {
+ s.strstart += s.match_length;
+ s.match_length = 0;
+ s.ins_h = s.window[s.strstart];
+ /* UPDATE_HASH(s, s.ins_h, s.window[s.strstart+1]); */
+ s.ins_h = ((s.ins_h << s.hash_shift) ^ s.window[s.strstart + 1]) & s.hash_mask;
+
+//#if MIN_MATCH != 3
+// Call UPDATE_HASH() MIN_MATCH-3 more times
+//#endif
+ /* If lookahead < MIN_MATCH, ins_h is garbage, but it does not
+ * matter since it will be recomputed at next deflate call.
+ */
+ }
+ } else {
+ /* No match, output a literal byte */
+ //Tracevv((stderr,"%c", s.window[s.strstart]));
+ /*** _tr_tally_lit(s, s.window[s.strstart], bflush); ***/
+ bflush = trees._tr_tally(s, 0, s.window[s.strstart]);
+
+ s.lookahead--;
+ s.strstart++;
+ }
+ if (bflush) {
+ /*** FLUSH_BLOCK(s, 0); ***/
+ flush_block_only(s, false);
+ if (s.strm.avail_out === 0) {
+ return BS_NEED_MORE;
+ }
+ /***/
+ }
+ }
+ s.insert = ((s.strstart < (MIN_MATCH - 1)) ? s.strstart : MIN_MATCH - 1);
+ if (flush === Z_FINISH) {
+ /*** FLUSH_BLOCK(s, 1); ***/
+ flush_block_only(s, true);
+ if (s.strm.avail_out === 0) {
+ return BS_FINISH_STARTED;
+ }
+ /***/
+ return BS_FINISH_DONE;
+ }
+ if (s.last_lit) {
+ /*** FLUSH_BLOCK(s, 0); ***/
+ flush_block_only(s, false);
+ if (s.strm.avail_out === 0) {
+ return BS_NEED_MORE;
+ }
+ /***/
+ }
+ return BS_BLOCK_DONE;
+}
+
+/* ===========================================================================
+ * Same as above, but achieves better compression. We use a lazy
+ * evaluation for matches: a match is finally adopted only if there is
+ * no better match at the next window position.
+ */
+function deflate_slow(s, flush) {
+ var hash_head; /* head of hash chain */
+ var bflush; /* set if current block must be flushed */
+
+ var max_insert;
+
+ /* Process the input block. */
+ for (;;) {
+ /* Make sure that we always have enough lookahead, except
+ * at the end of the input file. We need MAX_MATCH bytes
+ * for the next match, plus MIN_MATCH bytes to insert the
+ * string following the next match.
+ */
+ if (s.lookahead < MIN_LOOKAHEAD) {
+ fill_window(s);
+ if (s.lookahead < MIN_LOOKAHEAD && flush === Z_NO_FLUSH) {
+ return BS_NEED_MORE;
+ }
+ if (s.lookahead === 0) { break; } /* flush the current block */
+ }
+
+ /* Insert the string window[strstart .. strstart+2] in the
+ * dictionary, and set hash_head to the head of the hash chain:
+ */
+ hash_head = 0/*NIL*/;
+ if (s.lookahead >= MIN_MATCH) {
+ /*** INSERT_STRING(s, s.strstart, hash_head); ***/
+ s.ins_h = ((s.ins_h << s.hash_shift) ^ s.window[s.strstart + MIN_MATCH - 1]) & s.hash_mask;
+ hash_head = s.prev[s.strstart & s.w_mask] = s.head[s.ins_h];
+ s.head[s.ins_h] = s.strstart;
+ /***/
+ }
+
+ /* Find the longest match, discarding those <= prev_length.
+ */
+ s.prev_length = s.match_length;
+ s.prev_match = s.match_start;
+ s.match_length = MIN_MATCH - 1;
+
+ if (hash_head !== 0/*NIL*/ && s.prev_length < s.max_lazy_match &&
+ s.strstart - hash_head <= (s.w_size - MIN_LOOKAHEAD)/*MAX_DIST(s)*/) {
+ /* To simplify the code, we prevent matches with the string
+ * of window index 0 (in particular we have to avoid a match
+ * of the string with itself at the start of the input file).
+ */
+ s.match_length = longest_match(s, hash_head);
+ /* longest_match() sets match_start */
+
+ if (s.match_length <= 5 &&
+ (s.strategy === Z_FILTERED || (s.match_length === MIN_MATCH && s.strstart - s.match_start > 4096/*TOO_FAR*/))) {
+
+ /* If prev_match is also MIN_MATCH, match_start is garbage
+ * but we will ignore the current match anyway.
+ */
+ s.match_length = MIN_MATCH - 1;
+ }
+ }
+ /* If there was a match at the previous step and the current
+ * match is not better, output the previous match:
+ */
+ if (s.prev_length >= MIN_MATCH && s.match_length <= s.prev_length) {
+ max_insert = s.strstart + s.lookahead - MIN_MATCH;
+ /* Do not insert strings in hash table beyond this. */
+
+ //check_match(s, s.strstart-1, s.prev_match, s.prev_length);
+
+ /***_tr_tally_dist(s, s.strstart - 1 - s.prev_match,
+ s.prev_length - MIN_MATCH, bflush);***/
+ bflush = trees._tr_tally(s, s.strstart - 1 - s.prev_match, s.prev_length - MIN_MATCH);
+ /* Insert in hash table all strings up to the end of the match.
+ * strstart-1 and strstart are already inserted. If there is not
+ * enough lookahead, the last two strings are not inserted in
+ * the hash table.
+ */
+ s.lookahead -= s.prev_length - 1;
+ s.prev_length -= 2;
+ do {
+ if (++s.strstart <= max_insert) {
+ /*** INSERT_STRING(s, s.strstart, hash_head); ***/
+ s.ins_h = ((s.ins_h << s.hash_shift) ^ s.window[s.strstart + MIN_MATCH - 1]) & s.hash_mask;
+ hash_head = s.prev[s.strstart & s.w_mask] = s.head[s.ins_h];
+ s.head[s.ins_h] = s.strstart;
+ /***/
+ }
+ } while (--s.prev_length !== 0);
+ s.match_available = 0;
+ s.match_length = MIN_MATCH - 1;
+ s.strstart++;
+
+ if (bflush) {
+ /*** FLUSH_BLOCK(s, 0); ***/
+ flush_block_only(s, false);
+ if (s.strm.avail_out === 0) {
+ return BS_NEED_MORE;
+ }
+ /***/
+ }
+
+ } else if (s.match_available) {
+ /* If there was no match at the previous position, output a
+ * single literal. If there was a match but the current match
+ * is longer, truncate the previous match to a single literal.
+ */
+ //Tracevv((stderr,"%c", s->window[s->strstart-1]));
+ /*** _tr_tally_lit(s, s.window[s.strstart-1], bflush); ***/
+ bflush = trees._tr_tally(s, 0, s.window[s.strstart - 1]);
+
+ if (bflush) {
+ /*** FLUSH_BLOCK_ONLY(s, 0) ***/
+ flush_block_only(s, false);
+ /***/
+ }
+ s.strstart++;
+ s.lookahead--;
+ if (s.strm.avail_out === 0) {
+ return BS_NEED_MORE;
+ }
+ } else {
+ /* There is no previous match to compare with, wait for
+ * the next step to decide.
+ */
+ s.match_available = 1;
+ s.strstart++;
+ s.lookahead--;
+ }
+ }
+ //Assert (flush != Z_NO_FLUSH, "no flush?");
+ if (s.match_available) {
+ //Tracevv((stderr,"%c", s->window[s->strstart-1]));
+ /*** _tr_tally_lit(s, s.window[s.strstart-1], bflush); ***/
+ bflush = trees._tr_tally(s, 0, s.window[s.strstart - 1]);
+
+ s.match_available = 0;
+ }
+ s.insert = s.strstart < MIN_MATCH - 1 ? s.strstart : MIN_MATCH - 1;
+ if (flush === Z_FINISH) {
+ /*** FLUSH_BLOCK(s, 1); ***/
+ flush_block_only(s, true);
+ if (s.strm.avail_out === 0) {
+ return BS_FINISH_STARTED;
+ }
+ /***/
+ return BS_FINISH_DONE;
+ }
+ if (s.last_lit) {
+ /*** FLUSH_BLOCK(s, 0); ***/
+ flush_block_only(s, false);
+ if (s.strm.avail_out === 0) {
+ return BS_NEED_MORE;
+ }
+ /***/
+ }
+
+ return BS_BLOCK_DONE;
+}
+
+
+/* ===========================================================================
+ * For Z_RLE, simply look for runs of bytes, generate matches only of distance
+ * one. Do not maintain a hash table. (It will be regenerated if this run of
+ * deflate switches away from Z_RLE.)
+ */
+function deflate_rle(s, flush) {
+ var bflush; /* set if current block must be flushed */
+ var prev; /* byte at distance one to match */
+ var scan, strend; /* scan goes up to strend for length of run */
+
+ var _win = s.window;
+
+ for (;;) {
+ /* Make sure that we always have enough lookahead, except
+ * at the end of the input file. We need MAX_MATCH bytes
+ * for the longest run, plus one for the unrolled loop.
+ */
+ if (s.lookahead <= MAX_MATCH) {
+ fill_window(s);
+ if (s.lookahead <= MAX_MATCH && flush === Z_NO_FLUSH) {
+ return BS_NEED_MORE;
+ }
+ if (s.lookahead === 0) { break; } /* flush the current block */
+ }
+
+ /* See how many times the previous byte repeats */
+ s.match_length = 0;
+ if (s.lookahead >= MIN_MATCH && s.strstart > 0) {
+ scan = s.strstart - 1;
+ prev = _win[scan];
+ if (prev === _win[++scan] && prev === _win[++scan] && prev === _win[++scan]) {
+ strend = s.strstart + MAX_MATCH;
+ do {
+ /*jshint noempty:false*/
+ } while (prev === _win[++scan] && prev === _win[++scan] &&
+ prev === _win[++scan] && prev === _win[++scan] &&
+ prev === _win[++scan] && prev === _win[++scan] &&
+ prev === _win[++scan] && prev === _win[++scan] &&
+ scan < strend);
+ s.match_length = MAX_MATCH - (strend - scan);
+ if (s.match_length > s.lookahead) {
+ s.match_length = s.lookahead;
+ }
+ }
+ //Assert(scan <= s->window+(uInt)(s->window_size-1), "wild scan");
+ }
+
+ /* Emit match if have run of MIN_MATCH or longer, else emit literal */
+ if (s.match_length >= MIN_MATCH) {
+ //check_match(s, s.strstart, s.strstart - 1, s.match_length);
+
+ /*** _tr_tally_dist(s, 1, s.match_length - MIN_MATCH, bflush); ***/
+ bflush = trees._tr_tally(s, 1, s.match_length - MIN_MATCH);
+
+ s.lookahead -= s.match_length;
+ s.strstart += s.match_length;
+ s.match_length = 0;
+ } else {
+ /* No match, output a literal byte */
+ //Tracevv((stderr,"%c", s->window[s->strstart]));
+ /*** _tr_tally_lit(s, s.window[s.strstart], bflush); ***/
+ bflush = trees._tr_tally(s, 0, s.window[s.strstart]);
+
+ s.lookahead--;
+ s.strstart++;
+ }
+ if (bflush) {
+ /*** FLUSH_BLOCK(s, 0); ***/
+ flush_block_only(s, false);
+ if (s.strm.avail_out === 0) {
+ return BS_NEED_MORE;
+ }
+ /***/
+ }
+ }
+ s.insert = 0;
+ if (flush === Z_FINISH) {
+ /*** FLUSH_BLOCK(s, 1); ***/
+ flush_block_only(s, true);
+ if (s.strm.avail_out === 0) {
+ return BS_FINISH_STARTED;
+ }
+ /***/
+ return BS_FINISH_DONE;
+ }
+ if (s.last_lit) {
+ /*** FLUSH_BLOCK(s, 0); ***/
+ flush_block_only(s, false);
+ if (s.strm.avail_out === 0) {
+ return BS_NEED_MORE;
+ }
+ /***/
+ }
+ return BS_BLOCK_DONE;
+}
+
+/* ===========================================================================
+ * For Z_HUFFMAN_ONLY, do not look for matches. Do not maintain a hash table.
+ * (It will be regenerated if this run of deflate switches away from Huffman.)
+ */
+function deflate_huff(s, flush) {
+ var bflush; /* set if current block must be flushed */
+
+ for (;;) {
+ /* Make sure that we have a literal to write. */
+ if (s.lookahead === 0) {
+ fill_window(s);
+ if (s.lookahead === 0) {
+ if (flush === Z_NO_FLUSH) {
+ return BS_NEED_MORE;
+ }
+ break; /* flush the current block */
+ }
+ }
+
+ /* Output a literal byte */
+ s.match_length = 0;
+ //Tracevv((stderr,"%c", s->window[s->strstart]));
+ /*** _tr_tally_lit(s, s.window[s.strstart], bflush); ***/
+ bflush = trees._tr_tally(s, 0, s.window[s.strstart]);
+ s.lookahead--;
+ s.strstart++;
+ if (bflush) {
+ /*** FLUSH_BLOCK(s, 0); ***/
+ flush_block_only(s, false);
+ if (s.strm.avail_out === 0) {
+ return BS_NEED_MORE;
+ }
+ /***/
+ }
+ }
+ s.insert = 0;
+ if (flush === Z_FINISH) {
+ /*** FLUSH_BLOCK(s, 1); ***/
+ flush_block_only(s, true);
+ if (s.strm.avail_out === 0) {
+ return BS_FINISH_STARTED;
+ }
+ /***/
+ return BS_FINISH_DONE;
+ }
+ if (s.last_lit) {
+ /*** FLUSH_BLOCK(s, 0); ***/
+ flush_block_only(s, false);
+ if (s.strm.avail_out === 0) {
+ return BS_NEED_MORE;
+ }
+ /***/
+ }
+ return BS_BLOCK_DONE;
+}
+
+/* Values for max_lazy_match, good_match and max_chain_length, depending on
+ * the desired pack level (0..9). The values given below have been tuned to
+ * exclude worst case performance for pathological files. Better values may be
+ * found for specific files.
+ */
+function Config(good_length, max_lazy, nice_length, max_chain, func) {
+ this.good_length = good_length;
+ this.max_lazy = max_lazy;
+ this.nice_length = nice_length;
+ this.max_chain = max_chain;
+ this.func = func;
+}
+
+var configuration_table;
+
+configuration_table = [
+ /* good lazy nice chain */
+ new Config(0, 0, 0, 0, deflate_stored), /* 0 store only */
+ new Config(4, 4, 8, 4, deflate_fast), /* 1 max speed, no lazy matches */
+ new Config(4, 5, 16, 8, deflate_fast), /* 2 */
+ new Config(4, 6, 32, 32, deflate_fast), /* 3 */
+
+ new Config(4, 4, 16, 16, deflate_slow), /* 4 lazy matches */
+ new Config(8, 16, 32, 32, deflate_slow), /* 5 */
+ new Config(8, 16, 128, 128, deflate_slow), /* 6 */
+ new Config(8, 32, 128, 256, deflate_slow), /* 7 */
+ new Config(32, 128, 258, 1024, deflate_slow), /* 8 */
+ new Config(32, 258, 258, 4096, deflate_slow) /* 9 max compression */
+];
+
+
+/* ===========================================================================
+ * Initialize the "longest match" routines for a new zlib stream
+ */
+function lm_init(s) {
+ s.window_size = 2 * s.w_size;
+
+ /*** CLEAR_HASH(s); ***/
+ zero(s.head); // Fill with NIL (= 0);
+
+ /* Set the default configuration parameters:
+ */
+ s.max_lazy_match = configuration_table[s.level].max_lazy;
+ s.good_match = configuration_table[s.level].good_length;
+ s.nice_match = configuration_table[s.level].nice_length;
+ s.max_chain_length = configuration_table[s.level].max_chain;
+
+ s.strstart = 0;
+ s.block_start = 0;
+ s.lookahead = 0;
+ s.insert = 0;
+ s.match_length = s.prev_length = MIN_MATCH - 1;
+ s.match_available = 0;
+ s.ins_h = 0;
+}
+
+
+function DeflateState() {
+ this.strm = null; /* pointer back to this zlib stream */
+ this.status = 0; /* as the name implies */
+ this.pending_buf = null; /* output still pending */
+ this.pending_buf_size = 0; /* size of pending_buf */
+ this.pending_out = 0; /* next pending byte to output to the stream */
+ this.pending = 0; /* nb of bytes in the pending buffer */
+ this.wrap = 0; /* bit 0 true for zlib, bit 1 true for gzip */
+ this.gzhead = null; /* gzip header information to write */
+ this.gzindex = 0; /* where in extra, name, or comment */
+ this.method = Z_DEFLATED; /* can only be DEFLATED */
+ this.last_flush = -1; /* value of flush param for previous deflate call */
+
+ this.w_size = 0; /* LZ77 window size (32K by default) */
+ this.w_bits = 0; /* log2(w_size) (8..16) */
+ this.w_mask = 0; /* w_size - 1 */
+
+ this.window = null;
+ /* Sliding window. Input bytes are read into the second half of the window,
+ * and move to the first half later to keep a dictionary of at least wSize
+ * bytes. With this organization, matches are limited to a distance of
+ * wSize-MAX_MATCH bytes, but this ensures that IO is always
+ * performed with a length multiple of the block size.
+ */
+
+ this.window_size = 0;
+ /* Actual size of window: 2*wSize, except when the user input buffer
+ * is directly used as sliding window.
+ */
+
+ this.prev = null;
+ /* Link to older string with same hash index. To limit the size of this
+ * array to 64K, this link is maintained only for the last 32K strings.
+ * An index in this array is thus a window index modulo 32K.
+ */
+
+ this.head = null; /* Heads of the hash chains or NIL. */
+
+ this.ins_h = 0; /* hash index of string to be inserted */
+ this.hash_size = 0; /* number of elements in hash table */
+ this.hash_bits = 0; /* log2(hash_size) */
+ this.hash_mask = 0; /* hash_size-1 */
+
+ this.hash_shift = 0;
+ /* Number of bits by which ins_h must be shifted at each input
+ * step. It must be such that after MIN_MATCH steps, the oldest
+ * byte no longer takes part in the hash key, that is:
+ * hash_shift * MIN_MATCH >= hash_bits
+ */
+
+ this.block_start = 0;
+ /* Window position at the beginning of the current output block. Gets
+ * negative when the window is moved backwards.
+ */
+
+ this.match_length = 0; /* length of best match */
+ this.prev_match = 0; /* previous match */
+ this.match_available = 0; /* set if previous match exists */
+ this.strstart = 0; /* start of string to insert */
+ this.match_start = 0; /* start of matching string */
+ this.lookahead = 0; /* number of valid bytes ahead in window */
+
+ this.prev_length = 0;
+ /* Length of the best match at previous step. Matches not greater than this
+ * are discarded. This is used in the lazy match evaluation.
+ */
+
+ this.max_chain_length = 0;
+ /* To speed up deflation, hash chains are never searched beyond this
+ * length. A higher limit improves compression ratio but degrades the
+ * speed.
+ */
+
+ this.max_lazy_match = 0;
+ /* Attempt to find a better match only when the current match is strictly
+ * smaller than this value. This mechanism is used only for compression
+ * levels >= 4.
+ */
+ // That's alias to max_lazy_match, don't use directly
+ //this.max_insert_length = 0;
+ /* Insert new strings in the hash table only if the match length is not
+ * greater than this length. This saves time but degrades compression.
+ * max_insert_length is used only for compression levels <= 3.
+ */
+
+ this.level = 0; /* compression level (1..9) */
+ this.strategy = 0; /* favor or force Huffman coding*/
+
+ this.good_match = 0;
+ /* Use a faster search when the previous match is longer than this */
+
+ this.nice_match = 0; /* Stop searching when current match exceeds this */
+
+ /* used by trees.c: */
+
+ /* Didn't use ct_data typedef below to suppress compiler warning */
+
+ // struct ct_data_s dyn_ltree[HEAP_SIZE]; /* literal and length tree */
+ // struct ct_data_s dyn_dtree[2*D_CODES+1]; /* distance tree */
+ // struct ct_data_s bl_tree[2*BL_CODES+1]; /* Huffman tree for bit lengths */
+
+ // Use flat array of DOUBLE size, with interleaved fata,
+ // because JS does not support effective
+ this.dyn_ltree = new utils.Buf16(HEAP_SIZE * 2);
+ this.dyn_dtree = new utils.Buf16((2 * D_CODES + 1) * 2);
+ this.bl_tree = new utils.Buf16((2 * BL_CODES + 1) * 2);
+ zero(this.dyn_ltree);
+ zero(this.dyn_dtree);
+ zero(this.bl_tree);
+
+ this.l_desc = null; /* desc. for literal tree */
+ this.d_desc = null; /* desc. for distance tree */
+ this.bl_desc = null; /* desc. for bit length tree */
+
+ //ush bl_count[MAX_BITS+1];
+ this.bl_count = new utils.Buf16(MAX_BITS + 1);
+ /* number of codes at each bit length for an optimal tree */
+
+ //int heap[2*L_CODES+1]; /* heap used to build the Huffman trees */
+ this.heap = new utils.Buf16(2 * L_CODES + 1); /* heap used to build the Huffman trees */
+ zero(this.heap);
+
+ this.heap_len = 0; /* number of elements in the heap */
+ this.heap_max = 0; /* element of largest frequency */
+ /* The sons of heap[n] are heap[2*n] and heap[2*n+1]. heap[0] is not used.
+ * The same heap array is used to build all trees.
+ */
+
+ this.depth = new utils.Buf16(2 * L_CODES + 1); //uch depth[2*L_CODES+1];
+ zero(this.depth);
+ /* Depth of each subtree used as tie breaker for trees of equal frequency
+ */
+
+ this.l_buf = 0; /* buffer index for literals or lengths */
+
+ this.lit_bufsize = 0;
+ /* Size of match buffer for literals/lengths. There are 4 reasons for
+ * limiting lit_bufsize to 64K:
+ * - frequencies can be kept in 16 bit counters
+ * - if compression is not successful for the first block, all input
+ * data is still in the window so we can still emit a stored block even
+ * when input comes from standard input. (This can also be done for
+ * all blocks if lit_bufsize is not greater than 32K.)
+ * - if compression is not successful for a file smaller than 64K, we can
+ * even emit a stored file instead of a stored block (saving 5 bytes).
+ * This is applicable only for zip (not gzip or zlib).
+ * - creating new Huffman trees less frequently may not provide fast
+ * adaptation to changes in the input data statistics. (Take for
+ * example a binary file with poorly compressible code followed by
+ * a highly compressible string table.) Smaller buffer sizes give
+ * fast adaptation but have of course the overhead of transmitting
+ * trees more frequently.
+ * - I can't count above 4
+ */
+
+ this.last_lit = 0; /* running index in l_buf */
+
+ this.d_buf = 0;
+ /* Buffer index for distances. To simplify the code, d_buf and l_buf have
+ * the same number of elements. To use different lengths, an extra flag
+ * array would be necessary.
+ */
+
+ this.opt_len = 0; /* bit length of current block with optimal trees */
+ this.static_len = 0; /* bit length of current block with static trees */
+ this.matches = 0; /* number of string matches in current block */
+ this.insert = 0; /* bytes at end of window left to insert */
+
+
+ this.bi_buf = 0;
+ /* Output buffer. bits are inserted starting at the bottom (least
+ * significant bits).
+ */
+ this.bi_valid = 0;
+ /* Number of valid bits in bi_buf. All bits above the last valid bit
+ * are always zero.
+ */
+
+ // Used for window memory init. We safely ignore it for JS. That makes
+ // sense only for pointers and memory check tools.
+ //this.high_water = 0;
+ /* High water mark offset in window for initialized bytes -- bytes above
+ * this are set to zero in order to avoid memory check warnings when
+ * longest match routines access bytes past the input. This is then
+ * updated to the new high water mark.
+ */
+}
+
+
+function deflateResetKeep(strm) {
+ var s;
+
+ if (!strm || !strm.state) {
+ return err(strm, Z_STREAM_ERROR);
+ }
+
+ strm.total_in = strm.total_out = 0;
+ strm.data_type = Z_UNKNOWN;
+
+ s = strm.state;
+ s.pending = 0;
+ s.pending_out = 0;
+
+ if (s.wrap < 0) {
+ s.wrap = -s.wrap;
+ /* was made negative by deflate(..., Z_FINISH); */
+ }
+ s.status = (s.wrap ? INIT_STATE : BUSY_STATE);
+ strm.adler = (s.wrap === 2) ?
+ 0 // crc32(0, Z_NULL, 0)
+ :
+ 1; // adler32(0, Z_NULL, 0)
+ s.last_flush = Z_NO_FLUSH;
+ trees._tr_init(s);
+ return Z_OK;
+}
+
+
+function deflateReset(strm) {
+ var ret = deflateResetKeep(strm);
+ if (ret === Z_OK) {
+ lm_init(strm.state);
+ }
+ return ret;
+}
+
+
+function deflateSetHeader(strm, head) {
+ if (!strm || !strm.state) { return Z_STREAM_ERROR; }
+ if (strm.state.wrap !== 2) { return Z_STREAM_ERROR; }
+ strm.state.gzhead = head;
+ return Z_OK;
+}
+
+
+function deflateInit2(strm, level, method, windowBits, memLevel, strategy) {
+ if (!strm) { // === Z_NULL
+ return Z_STREAM_ERROR;
+ }
+ var wrap = 1;
+
+ if (level === Z_DEFAULT_COMPRESSION) {
+ level = 6;
+ }
+
+ if (windowBits < 0) { /* suppress zlib wrapper */
+ wrap = 0;
+ windowBits = -windowBits;
+ }
+
+ else if (windowBits > 15) {
+ wrap = 2; /* write gzip wrapper instead */
+ windowBits -= 16;
+ }
+
+
+ if (memLevel < 1 || memLevel > MAX_MEM_LEVEL || method !== Z_DEFLATED ||
+ windowBits < 8 || windowBits > 15 || level < 0 || level > 9 ||
+ strategy < 0 || strategy > Z_FIXED) {
+ return err(strm, Z_STREAM_ERROR);
+ }
+
+
+ if (windowBits === 8) {
+ windowBits = 9;
+ }
+ /* until 256-byte window bug fixed */
+
+ var s = new DeflateState();
+
+ strm.state = s;
+ s.strm = strm;
+
+ s.wrap = wrap;
+ s.gzhead = null;
+ s.w_bits = windowBits;
+ s.w_size = 1 << s.w_bits;
+ s.w_mask = s.w_size - 1;
+
+ s.hash_bits = memLevel + 7;
+ s.hash_size = 1 << s.hash_bits;
+ s.hash_mask = s.hash_size - 1;
+ s.hash_shift = ~~((s.hash_bits + MIN_MATCH - 1) / MIN_MATCH);
+
+ s.window = new utils.Buf8(s.w_size * 2);
+ s.head = new utils.Buf16(s.hash_size);
+ s.prev = new utils.Buf16(s.w_size);
+
+ // Don't need mem init magic for JS.
+ //s.high_water = 0; /* nothing written to s->window yet */
+
+ s.lit_bufsize = 1 << (memLevel + 6); /* 16K elements by default */
+
+ s.pending_buf_size = s.lit_bufsize * 4;
+
+ //overlay = (ushf *) ZALLOC(strm, s->lit_bufsize, sizeof(ush)+2);
+ //s->pending_buf = (uchf *) overlay;
+ s.pending_buf = new utils.Buf8(s.pending_buf_size);
+
+ // It is offset from `s.pending_buf` (size is `s.lit_bufsize * 2`)
+ //s->d_buf = overlay + s->lit_bufsize/sizeof(ush);
+ s.d_buf = 1 * s.lit_bufsize;
+
+ //s->l_buf = s->pending_buf + (1+sizeof(ush))*s->lit_bufsize;
+ s.l_buf = (1 + 2) * s.lit_bufsize;
+
+ s.level = level;
+ s.strategy = strategy;
+ s.method = method;
+
+ return deflateReset(strm);
+}
+
+function deflateInit(strm, level) {
+ return deflateInit2(strm, level, Z_DEFLATED, MAX_WBITS, DEF_MEM_LEVEL, Z_DEFAULT_STRATEGY);
+}
+
+
+function deflate(strm, flush) {
+ var old_flush, s;
+ var beg, val; // for gzip header write only
+
+ if (!strm || !strm.state ||
+ flush > Z_BLOCK || flush < 0) {
+ return strm ? err(strm, Z_STREAM_ERROR) : Z_STREAM_ERROR;
+ }
+
+ s = strm.state;
+
+ if (!strm.output ||
+ (!strm.input && strm.avail_in !== 0) ||
+ (s.status === FINISH_STATE && flush !== Z_FINISH)) {
+ return err(strm, (strm.avail_out === 0) ? Z_BUF_ERROR : Z_STREAM_ERROR);
+ }
+
+ s.strm = strm; /* just in case */
+ old_flush = s.last_flush;
+ s.last_flush = flush;
+
+ /* Write the header */
+ if (s.status === INIT_STATE) {
+
+ if (s.wrap === 2) { // GZIP header
+ strm.adler = 0; //crc32(0L, Z_NULL, 0);
+ put_byte(s, 31);
+ put_byte(s, 139);
+ put_byte(s, 8);
+ if (!s.gzhead) { // s->gzhead == Z_NULL
+ put_byte(s, 0);
+ put_byte(s, 0);
+ put_byte(s, 0);
+ put_byte(s, 0);
+ put_byte(s, 0);
+ put_byte(s, s.level === 9 ? 2 :
+ (s.strategy >= Z_HUFFMAN_ONLY || s.level < 2 ?
+ 4 : 0));
+ put_byte(s, OS_CODE);
+ s.status = BUSY_STATE;
+ }
+ else {
+ put_byte(s, (s.gzhead.text ? 1 : 0) +
+ (s.gzhead.hcrc ? 2 : 0) +
+ (!s.gzhead.extra ? 0 : 4) +
+ (!s.gzhead.name ? 0 : 8) +
+ (!s.gzhead.comment ? 0 : 16)
+ );
+ put_byte(s, s.gzhead.time & 0xff);
+ put_byte(s, (s.gzhead.time >> 8) & 0xff);
+ put_byte(s, (s.gzhead.time >> 16) & 0xff);
+ put_byte(s, (s.gzhead.time >> 24) & 0xff);
+ put_byte(s, s.level === 9 ? 2 :
+ (s.strategy >= Z_HUFFMAN_ONLY || s.level < 2 ?
+ 4 : 0));
+ put_byte(s, s.gzhead.os & 0xff);
+ if (s.gzhead.extra && s.gzhead.extra.length) {
+ put_byte(s, s.gzhead.extra.length & 0xff);
+ put_byte(s, (s.gzhead.extra.length >> 8) & 0xff);
+ }
+ if (s.gzhead.hcrc) {
+ strm.adler = crc32(strm.adler, s.pending_buf, s.pending, 0);
+ }
+ s.gzindex = 0;
+ s.status = EXTRA_STATE;
+ }
+ }
+ else // DEFLATE header
+ {
+ var header = (Z_DEFLATED + ((s.w_bits - 8) << 4)) << 8;
+ var level_flags = -1;
+
+ if (s.strategy >= Z_HUFFMAN_ONLY || s.level < 2) {
+ level_flags = 0;
+ } else if (s.level < 6) {
+ level_flags = 1;
+ } else if (s.level === 6) {
+ level_flags = 2;
+ } else {
+ level_flags = 3;
+ }
+ header |= (level_flags << 6);
+ if (s.strstart !== 0) { header |= PRESET_DICT; }
+ header += 31 - (header % 31);
+
+ s.status = BUSY_STATE;
+ putShortMSB(s, header);
+
+ /* Save the adler32 of the preset dictionary: */
+ if (s.strstart !== 0) {
+ putShortMSB(s, strm.adler >>> 16);
+ putShortMSB(s, strm.adler & 0xffff);
+ }
+ strm.adler = 1; // adler32(0L, Z_NULL, 0);
+ }
+ }
+
+//#ifdef GZIP
+ if (s.status === EXTRA_STATE) {
+ if (s.gzhead.extra/* != Z_NULL*/) {
+ beg = s.pending; /* start of bytes to update crc */
+
+ while (s.gzindex < (s.gzhead.extra.length & 0xffff)) {
+ if (s.pending === s.pending_buf_size) {
+ if (s.gzhead.hcrc && s.pending > beg) {
+ strm.adler = crc32(strm.adler, s.pending_buf, s.pending - beg, beg);
+ }
+ flush_pending(strm);
+ beg = s.pending;
+ if (s.pending === s.pending_buf_size) {
+ break;
+ }
+ }
+ put_byte(s, s.gzhead.extra[s.gzindex] & 0xff);
+ s.gzindex++;
+ }
+ if (s.gzhead.hcrc && s.pending > beg) {
+ strm.adler = crc32(strm.adler, s.pending_buf, s.pending - beg, beg);
+ }
+ if (s.gzindex === s.gzhead.extra.length) {
+ s.gzindex = 0;
+ s.status = NAME_STATE;
+ }
+ }
+ else {
+ s.status = NAME_STATE;
+ }
+ }
+ if (s.status === NAME_STATE) {
+ if (s.gzhead.name/* != Z_NULL*/) {
+ beg = s.pending; /* start of bytes to update crc */
+ //int val;
+
+ do {
+ if (s.pending === s.pending_buf_size) {
+ if (s.gzhead.hcrc && s.pending > beg) {
+ strm.adler = crc32(strm.adler, s.pending_buf, s.pending - beg, beg);
+ }
+ flush_pending(strm);
+ beg = s.pending;
+ if (s.pending === s.pending_buf_size) {
+ val = 1;
+ break;
+ }
+ }
+ // JS specific: little magic to add zero terminator to end of string
+ if (s.gzindex < s.gzhead.name.length) {
+ val = s.gzhead.name.charCodeAt(s.gzindex++) & 0xff;
+ } else {
+ val = 0;
+ }
+ put_byte(s, val);
+ } while (val !== 0);
+
+ if (s.gzhead.hcrc && s.pending > beg) {
+ strm.adler = crc32(strm.adler, s.pending_buf, s.pending - beg, beg);
+ }
+ if (val === 0) {
+ s.gzindex = 0;
+ s.status = COMMENT_STATE;
+ }
+ }
+ else {
+ s.status = COMMENT_STATE;
+ }
+ }
+ if (s.status === COMMENT_STATE) {
+ if (s.gzhead.comment/* != Z_NULL*/) {
+ beg = s.pending; /* start of bytes to update crc */
+ //int val;
+
+ do {
+ if (s.pending === s.pending_buf_size) {
+ if (s.gzhead.hcrc && s.pending > beg) {
+ strm.adler = crc32(strm.adler, s.pending_buf, s.pending - beg, beg);
+ }
+ flush_pending(strm);
+ beg = s.pending;
+ if (s.pending === s.pending_buf_size) {
+ val = 1;
+ break;
+ }
+ }
+ // JS specific: little magic to add zero terminator to end of string
+ if (s.gzindex < s.gzhead.comment.length) {
+ val = s.gzhead.comment.charCodeAt(s.gzindex++) & 0xff;
+ } else {
+ val = 0;
+ }
+ put_byte(s, val);
+ } while (val !== 0);
+
+ if (s.gzhead.hcrc && s.pending > beg) {
+ strm.adler = crc32(strm.adler, s.pending_buf, s.pending - beg, beg);
+ }
+ if (val === 0) {
+ s.status = HCRC_STATE;
+ }
+ }
+ else {
+ s.status = HCRC_STATE;
+ }
+ }
+ if (s.status === HCRC_STATE) {
+ if (s.gzhead.hcrc) {
+ if (s.pending + 2 > s.pending_buf_size) {
+ flush_pending(strm);
+ }
+ if (s.pending + 2 <= s.pending_buf_size) {
+ put_byte(s, strm.adler & 0xff);
+ put_byte(s, (strm.adler >> 8) & 0xff);
+ strm.adler = 0; //crc32(0L, Z_NULL, 0);
+ s.status = BUSY_STATE;
+ }
+ }
+ else {
+ s.status = BUSY_STATE;
+ }
+ }
+//#endif
+
+ /* Flush as much pending output as possible */
+ if (s.pending !== 0) {
+ flush_pending(strm);
+ if (strm.avail_out === 0) {
+ /* Since avail_out is 0, deflate will be called again with
+ * more output space, but possibly with both pending and
+ * avail_in equal to zero. There won't be anything to do,
+ * but this is not an error situation so make sure we
+ * return OK instead of BUF_ERROR at next call of deflate:
+ */
+ s.last_flush = -1;
+ return Z_OK;
+ }
+
+ /* Make sure there is something to do and avoid duplicate consecutive
+ * flushes. For repeated and useless calls with Z_FINISH, we keep
+ * returning Z_STREAM_END instead of Z_BUF_ERROR.
+ */
+ } else if (strm.avail_in === 0 && rank(flush) <= rank(old_flush) &&
+ flush !== Z_FINISH) {
+ return err(strm, Z_BUF_ERROR);
+ }
+
+ /* User must not provide more input after the first FINISH: */
+ if (s.status === FINISH_STATE && strm.avail_in !== 0) {
+ return err(strm, Z_BUF_ERROR);
+ }
+
+ /* Start a new block or continue the current one.
+ */
+ if (strm.avail_in !== 0 || s.lookahead !== 0 ||
+ (flush !== Z_NO_FLUSH && s.status !== FINISH_STATE)) {
+ var bstate = (s.strategy === Z_HUFFMAN_ONLY) ? deflate_huff(s, flush) :
+ (s.strategy === Z_RLE ? deflate_rle(s, flush) :
+ configuration_table[s.level].func(s, flush));
+
+ if (bstate === BS_FINISH_STARTED || bstate === BS_FINISH_DONE) {
+ s.status = FINISH_STATE;
+ }
+ if (bstate === BS_NEED_MORE || bstate === BS_FINISH_STARTED) {
+ if (strm.avail_out === 0) {
+ s.last_flush = -1;
+ /* avoid BUF_ERROR next call, see above */
+ }
+ return Z_OK;
+ /* If flush != Z_NO_FLUSH && avail_out == 0, the next call
+ * of deflate should use the same flush parameter to make sure
+ * that the flush is complete. So we don't have to output an
+ * empty block here, this will be done at next call. This also
+ * ensures that for a very small output buffer, we emit at most
+ * one empty block.
+ */
+ }
+ if (bstate === BS_BLOCK_DONE) {
+ if (flush === Z_PARTIAL_FLUSH) {
+ trees._tr_align(s);
+ }
+ else if (flush !== Z_BLOCK) { /* FULL_FLUSH or SYNC_FLUSH */
+
+ trees._tr_stored_block(s, 0, 0, false);
+ /* For a full flush, this empty block will be recognized
+ * as a special marker by inflate_sync().
+ */
+ if (flush === Z_FULL_FLUSH) {
+ /*** CLEAR_HASH(s); ***/ /* forget history */
+ zero(s.head); // Fill with NIL (= 0);
+
+ if (s.lookahead === 0) {
+ s.strstart = 0;
+ s.block_start = 0;
+ s.insert = 0;
+ }
+ }
+ }
+ flush_pending(strm);
+ if (strm.avail_out === 0) {
+ s.last_flush = -1; /* avoid BUF_ERROR at next call, see above */
+ return Z_OK;
+ }
+ }
+ }
+ //Assert(strm->avail_out > 0, "bug2");
+ //if (strm.avail_out <= 0) { throw new Error("bug2");}
+
+ if (flush !== Z_FINISH) { return Z_OK; }
+ if (s.wrap <= 0) { return Z_STREAM_END; }
+
+ /* Write the trailer */
+ if (s.wrap === 2) {
+ put_byte(s, strm.adler & 0xff);
+ put_byte(s, (strm.adler >> 8) & 0xff);
+ put_byte(s, (strm.adler >> 16) & 0xff);
+ put_byte(s, (strm.adler >> 24) & 0xff);
+ put_byte(s, strm.total_in & 0xff);
+ put_byte(s, (strm.total_in >> 8) & 0xff);
+ put_byte(s, (strm.total_in >> 16) & 0xff);
+ put_byte(s, (strm.total_in >> 24) & 0xff);
+ }
+ else
+ {
+ putShortMSB(s, strm.adler >>> 16);
+ putShortMSB(s, strm.adler & 0xffff);
+ }
+
+ flush_pending(strm);
+ /* If avail_out is zero, the application will call deflate again
+ * to flush the rest.
+ */
+ if (s.wrap > 0) { s.wrap = -s.wrap; }
+ /* write the trailer only once! */
+ return s.pending !== 0 ? Z_OK : Z_STREAM_END;
+}
+
+function deflateEnd(strm) {
+ var status;
+
+ if (!strm/*== Z_NULL*/ || !strm.state/*== Z_NULL*/) {
+ return Z_STREAM_ERROR;
+ }
+
+ status = strm.state.status;
+ if (status !== INIT_STATE &&
+ status !== EXTRA_STATE &&
+ status !== NAME_STATE &&
+ status !== COMMENT_STATE &&
+ status !== HCRC_STATE &&
+ status !== BUSY_STATE &&
+ status !== FINISH_STATE
+ ) {
+ return err(strm, Z_STREAM_ERROR);
+ }
+
+ strm.state = null;
+
+ return status === BUSY_STATE ? err(strm, Z_DATA_ERROR) : Z_OK;
+}
+
+
+/* =========================================================================
+ * Initializes the compression dictionary from the given byte
+ * sequence without producing any compressed output.
+ */
+function deflateSetDictionary(strm, dictionary) {
+ var dictLength = dictionary.length;
+
+ var s;
+ var str, n;
+ var wrap;
+ var avail;
+ var next;
+ var input;
+ var tmpDict;
+
+ if (!strm/*== Z_NULL*/ || !strm.state/*== Z_NULL*/) {
+ return Z_STREAM_ERROR;
+ }
+
+ s = strm.state;
+ wrap = s.wrap;
+
+ if (wrap === 2 || (wrap === 1 && s.status !== INIT_STATE) || s.lookahead) {
+ return Z_STREAM_ERROR;
+ }
+
+ /* when using zlib wrappers, compute Adler-32 for provided dictionary */
+ if (wrap === 1) {
+ /* adler32(strm->adler, dictionary, dictLength); */
+ strm.adler = adler32(strm.adler, dictionary, dictLength, 0);
+ }
+
+ s.wrap = 0; /* avoid computing Adler-32 in read_buf */
+
+ /* if dictionary would fill window, just replace the history */
+ if (dictLength >= s.w_size) {
+ if (wrap === 0) { /* already empty otherwise */
+ /*** CLEAR_HASH(s); ***/
+ zero(s.head); // Fill with NIL (= 0);
+ s.strstart = 0;
+ s.block_start = 0;
+ s.insert = 0;
+ }
+ /* use the tail */
+ // dictionary = dictionary.slice(dictLength - s.w_size);
+ tmpDict = new utils.Buf8(s.w_size);
+ utils.arraySet(tmpDict, dictionary, dictLength - s.w_size, s.w_size, 0);
+ dictionary = tmpDict;
+ dictLength = s.w_size;
+ }
+ /* insert dictionary into window and hash */
+ avail = strm.avail_in;
+ next = strm.next_in;
+ input = strm.input;
+ strm.avail_in = dictLength;
+ strm.next_in = 0;
+ strm.input = dictionary;
+ fill_window(s);
+ while (s.lookahead >= MIN_MATCH) {
+ str = s.strstart;
+ n = s.lookahead - (MIN_MATCH - 1);
+ do {
+ /* UPDATE_HASH(s, s->ins_h, s->window[str + MIN_MATCH-1]); */
+ s.ins_h = ((s.ins_h << s.hash_shift) ^ s.window[str + MIN_MATCH - 1]) & s.hash_mask;
+
+ s.prev[str & s.w_mask] = s.head[s.ins_h];
+
+ s.head[s.ins_h] = str;
+ str++;
+ } while (--n);
+ s.strstart = str;
+ s.lookahead = MIN_MATCH - 1;
+ fill_window(s);
+ }
+ s.strstart += s.lookahead;
+ s.block_start = s.strstart;
+ s.insert = s.lookahead;
+ s.lookahead = 0;
+ s.match_length = s.prev_length = MIN_MATCH - 1;
+ s.match_available = 0;
+ strm.next_in = next;
+ strm.input = input;
+ strm.avail_in = avail;
+ s.wrap = wrap;
+ return Z_OK;
+}
+
+
+exports.deflateInit = deflateInit;
+exports.deflateInit2 = deflateInit2;
+exports.deflateReset = deflateReset;
+exports.deflateResetKeep = deflateResetKeep;
+exports.deflateSetHeader = deflateSetHeader;
+exports.deflate = deflate;
+exports.deflateEnd = deflateEnd;
+exports.deflateSetDictionary = deflateSetDictionary;
+exports.deflateInfo = 'pako deflate (from Nodeca project)';
+
+/* Not implemented
+exports.deflateBound = deflateBound;
+exports.deflateCopy = deflateCopy;
+exports.deflateParams = deflateParams;
+exports.deflatePending = deflatePending;
+exports.deflatePrime = deflatePrime;
+exports.deflateTune = deflateTune;
+*/
+
+},{"../utils/common":3,"./adler32":5,"./crc32":7,"./messages":13,"./trees":14}],9:[function(require,module,exports){
+'use strict';
+
+// (C) 1995-2013 Jean-loup Gailly and Mark Adler
+// (C) 2014-2017 Vitaly Puzrin and Andrey Tupitsin
+//
+// This software is provided 'as-is', without any express or implied
+// warranty. In no event will the authors be held liable for any damages
+// arising from the use of this software.
+//
+// Permission is granted to anyone to use this software for any purpose,
+// including commercial applications, and to alter it and redistribute it
+// freely, subject to the following restrictions:
+//
+// 1. The origin of this software must not be misrepresented; you must not
+// claim that you wrote the original software. If you use this software
+// in a product, an acknowledgment in the product documentation would be
+// appreciated but is not required.
+// 2. Altered source versions must be plainly marked as such, and must not be
+// misrepresented as being the original software.
+// 3. This notice may not be removed or altered from any source distribution.
+
+function GZheader() {
+ /* true if compressed data believed to be text */
+ this.text = 0;
+ /* modification time */
+ this.time = 0;
+ /* extra flags (not used when writing a gzip file) */
+ this.xflags = 0;
+ /* operating system */
+ this.os = 0;
+ /* pointer to extra field or Z_NULL if none */
+ this.extra = null;
+ /* extra field length (valid if extra != Z_NULL) */
+ this.extra_len = 0; // Actually, we don't need it in JS,
+ // but leave for few code modifications
+
+ //
+ // Setup limits is not necessary because in js we should not preallocate memory
+ // for inflate use constant limit in 65536 bytes
+ //
+
+ /* space at extra (only when reading header) */
+ // this.extra_max = 0;
+ /* pointer to zero-terminated file name or Z_NULL */
+ this.name = '';
+ /* space at name (only when reading header) */
+ // this.name_max = 0;
+ /* pointer to zero-terminated comment or Z_NULL */
+ this.comment = '';
+ /* space at comment (only when reading header) */
+ // this.comm_max = 0;
+ /* true if there was or will be a header crc */
+ this.hcrc = 0;
+ /* true when done reading gzip header (not used when writing a gzip file) */
+ this.done = false;
+}
+
+module.exports = GZheader;
+
+},{}],10:[function(require,module,exports){
+'use strict';
+
+// (C) 1995-2013 Jean-loup Gailly and Mark Adler
+// (C) 2014-2017 Vitaly Puzrin and Andrey Tupitsin
+//
+// This software is provided 'as-is', without any express or implied
+// warranty. In no event will the authors be held liable for any damages
+// arising from the use of this software.
+//
+// Permission is granted to anyone to use this software for any purpose,
+// including commercial applications, and to alter it and redistribute it
+// freely, subject to the following restrictions:
+//
+// 1. The origin of this software must not be misrepresented; you must not
+// claim that you wrote the original software. If you use this software
+// in a product, an acknowledgment in the product documentation would be
+// appreciated but is not required.
+// 2. Altered source versions must be plainly marked as such, and must not be
+// misrepresented as being the original software.
+// 3. This notice may not be removed or altered from any source distribution.
+
+// See state defs from inflate.js
+var BAD = 30; /* got a data error -- remain here until reset */
+var TYPE = 12; /* i: waiting for type bits, including last-flag bit */
+
+/*
+ Decode literal, length, and distance codes and write out the resulting
+ literal and match bytes until either not enough input or output is
+ available, an end-of-block is encountered, or a data error is encountered.
+ When large enough input and output buffers are supplied to inflate(), for
+ example, a 16K input buffer and a 64K output buffer, more than 95% of the
+ inflate execution time is spent in this routine.
+
+ Entry assumptions:
+
+ state.mode === LEN
+ strm.avail_in >= 6
+ strm.avail_out >= 258
+ start >= strm.avail_out
+ state.bits < 8
+
+ On return, state.mode is one of:
+
+ LEN -- ran out of enough output space or enough available input
+ TYPE -- reached end of block code, inflate() to interpret next block
+ BAD -- error in block data
+
+ Notes:
+
+ - The maximum input bits used by a length/distance pair is 15 bits for the
+ length code, 5 bits for the length extra, 15 bits for the distance code,
+ and 13 bits for the distance extra. This totals 48 bits, or six bytes.
+ Therefore if strm.avail_in >= 6, then there is enough input to avoid
+ checking for available input while decoding.
+
+ - The maximum bytes that a single length/distance pair can output is 258
+ bytes, which is the maximum length that can be coded. inflate_fast()
+ requires strm.avail_out >= 258 for each loop to avoid checking for
+ output space.
+ */
+module.exports = function inflate_fast(strm, start) {
+ var state;
+ var _in; /* local strm.input */
+ var last; /* have enough input while in < last */
+ var _out; /* local strm.output */
+ var beg; /* inflate()'s initial strm.output */
+ var end; /* while out < end, enough space available */
+//#ifdef INFLATE_STRICT
+ var dmax; /* maximum distance from zlib header */
+//#endif
+ var wsize; /* window size or zero if not using window */
+ var whave; /* valid bytes in the window */
+ var wnext; /* window write index */
+ // Use `s_window` instead `window`, avoid conflict with instrumentation tools
+ var s_window; /* allocated sliding window, if wsize != 0 */
+ var hold; /* local strm.hold */
+ var bits; /* local strm.bits */
+ var lcode; /* local strm.lencode */
+ var dcode; /* local strm.distcode */
+ var lmask; /* mask for first level of length codes */
+ var dmask; /* mask for first level of distance codes */
+ var here; /* retrieved table entry */
+ var op; /* code bits, operation, extra bits, or */
+ /* window position, window bytes to copy */
+ var len; /* match length, unused bytes */
+ var dist; /* match distance */
+ var from; /* where to copy match from */
+ var from_source;
+
+
+ var input, output; // JS specific, because we have no pointers
+
+ /* copy state to local variables */
+ state = strm.state;
+ //here = state.here;
+ _in = strm.next_in;
+ input = strm.input;
+ last = _in + (strm.avail_in - 5);
+ _out = strm.next_out;
+ output = strm.output;
+ beg = _out - (start - strm.avail_out);
+ end = _out + (strm.avail_out - 257);
+//#ifdef INFLATE_STRICT
+ dmax = state.dmax;
+//#endif
+ wsize = state.wsize;
+ whave = state.whave;
+ wnext = state.wnext;
+ s_window = state.window;
+ hold = state.hold;
+ bits = state.bits;
+ lcode = state.lencode;
+ dcode = state.distcode;
+ lmask = (1 << state.lenbits) - 1;
+ dmask = (1 << state.distbits) - 1;
+
+
+ /* decode literals and length/distances until end-of-block or not enough
+ input data or output space */
+
+ top:
+ do {
+ if (bits < 15) {
+ hold += input[_in++] << bits;
+ bits += 8;
+ hold += input[_in++] << bits;
+ bits += 8;
+ }
+
+ here = lcode[hold & lmask];
+
+ dolen:
+ for (;;) { // Goto emulation
+ op = here >>> 24/*here.bits*/;
+ hold >>>= op;
+ bits -= op;
+ op = (here >>> 16) & 0xff/*here.op*/;
+ if (op === 0) { /* literal */
+ //Tracevv((stderr, here.val >= 0x20 && here.val < 0x7f ?
+ // "inflate: literal '%c'\n" :
+ // "inflate: literal 0x%02x\n", here.val));
+ output[_out++] = here & 0xffff/*here.val*/;
+ }
+ else if (op & 16) { /* length base */
+ len = here & 0xffff/*here.val*/;
+ op &= 15; /* number of extra bits */
+ if (op) {
+ if (bits < op) {
+ hold += input[_in++] << bits;
+ bits += 8;
+ }
+ len += hold & ((1 << op) - 1);
+ hold >>>= op;
+ bits -= op;
+ }
+ //Tracevv((stderr, "inflate: length %u\n", len));
+ if (bits < 15) {
+ hold += input[_in++] << bits;
+ bits += 8;
+ hold += input[_in++] << bits;
+ bits += 8;
+ }
+ here = dcode[hold & dmask];
+
+ dodist:
+ for (;;) { // goto emulation
+ op = here >>> 24/*here.bits*/;
+ hold >>>= op;
+ bits -= op;
+ op = (here >>> 16) & 0xff/*here.op*/;
+
+ if (op & 16) { /* distance base */
+ dist = here & 0xffff/*here.val*/;
+ op &= 15; /* number of extra bits */
+ if (bits < op) {
+ hold += input[_in++] << bits;
+ bits += 8;
+ if (bits < op) {
+ hold += input[_in++] << bits;
+ bits += 8;
+ }
+ }
+ dist += hold & ((1 << op) - 1);
+//#ifdef INFLATE_STRICT
+ if (dist > dmax) {
+ strm.msg = 'invalid distance too far back';
+ state.mode = BAD;
+ break top;
+ }
+//#endif
+ hold >>>= op;
+ bits -= op;
+ //Tracevv((stderr, "inflate: distance %u\n", dist));
+ op = _out - beg; /* max distance in output */
+ if (dist > op) { /* see if copy from window */
+ op = dist - op; /* distance back in window */
+ if (op > whave) {
+ if (state.sane) {
+ strm.msg = 'invalid distance too far back';
+ state.mode = BAD;
+ break top;
+ }
+
+// (!) This block is disabled in zlib defaults,
+// don't enable it for binary compatibility
+//#ifdef INFLATE_ALLOW_INVALID_DISTANCE_TOOFAR_ARRR
+// if (len <= op - whave) {
+// do {
+// output[_out++] = 0;
+// } while (--len);
+// continue top;
+// }
+// len -= op - whave;
+// do {
+// output[_out++] = 0;
+// } while (--op > whave);
+// if (op === 0) {
+// from = _out - dist;
+// do {
+// output[_out++] = output[from++];
+// } while (--len);
+// continue top;
+// }
+//#endif
+ }
+ from = 0; // window index
+ from_source = s_window;
+ if (wnext === 0) { /* very common case */
+ from += wsize - op;
+ if (op < len) { /* some from window */
+ len -= op;
+ do {
+ output[_out++] = s_window[from++];
+ } while (--op);
+ from = _out - dist; /* rest from output */
+ from_source = output;
+ }
+ }
+ else if (wnext < op) { /* wrap around window */
+ from += wsize + wnext - op;
+ op -= wnext;
+ if (op < len) { /* some from end of window */
+ len -= op;
+ do {
+ output[_out++] = s_window[from++];
+ } while (--op);
+ from = 0;
+ if (wnext < len) { /* some from start of window */
+ op = wnext;
+ len -= op;
+ do {
+ output[_out++] = s_window[from++];
+ } while (--op);
+ from = _out - dist; /* rest from output */
+ from_source = output;
+ }
+ }
+ }
+ else { /* contiguous in window */
+ from += wnext - op;
+ if (op < len) { /* some from window */
+ len -= op;
+ do {
+ output[_out++] = s_window[from++];
+ } while (--op);
+ from = _out - dist; /* rest from output */
+ from_source = output;
+ }
+ }
+ while (len > 2) {
+ output[_out++] = from_source[from++];
+ output[_out++] = from_source[from++];
+ output[_out++] = from_source[from++];
+ len -= 3;
+ }
+ if (len) {
+ output[_out++] = from_source[from++];
+ if (len > 1) {
+ output[_out++] = from_source[from++];
+ }
+ }
+ }
+ else {
+ from = _out - dist; /* copy direct from output */
+ do { /* minimum length is three */
+ output[_out++] = output[from++];
+ output[_out++] = output[from++];
+ output[_out++] = output[from++];
+ len -= 3;
+ } while (len > 2);
+ if (len) {
+ output[_out++] = output[from++];
+ if (len > 1) {
+ output[_out++] = output[from++];
+ }
+ }
+ }
+ }
+ else if ((op & 64) === 0) { /* 2nd level distance code */
+ here = dcode[(here & 0xffff)/*here.val*/ + (hold & ((1 << op) - 1))];
+ continue dodist;
+ }
+ else {
+ strm.msg = 'invalid distance code';
+ state.mode = BAD;
+ break top;
+ }
+
+ break; // need to emulate goto via "continue"
+ }
+ }
+ else if ((op & 64) === 0) { /* 2nd level length code */
+ here = lcode[(here & 0xffff)/*here.val*/ + (hold & ((1 << op) - 1))];
+ continue dolen;
+ }
+ else if (op & 32) { /* end-of-block */
+ //Tracevv((stderr, "inflate: end of block\n"));
+ state.mode = TYPE;
+ break top;
+ }
+ else {
+ strm.msg = 'invalid literal/length code';
+ state.mode = BAD;
+ break top;
+ }
+
+ break; // need to emulate goto via "continue"
+ }
+ } while (_in < last && _out < end);
+
+ /* return unused bytes (on entry, bits < 8, so in won't go too far back) */
+ len = bits >> 3;
+ _in -= len;
+ bits -= len << 3;
+ hold &= (1 << bits) - 1;
+
+ /* update state and return */
+ strm.next_in = _in;
+ strm.next_out = _out;
+ strm.avail_in = (_in < last ? 5 + (last - _in) : 5 - (_in - last));
+ strm.avail_out = (_out < end ? 257 + (end - _out) : 257 - (_out - end));
+ state.hold = hold;
+ state.bits = bits;
+ return;
+};
+
+},{}],11:[function(require,module,exports){
+'use strict';
+
+// (C) 1995-2013 Jean-loup Gailly and Mark Adler
+// (C) 2014-2017 Vitaly Puzrin and Andrey Tupitsin
+//
+// This software is provided 'as-is', without any express or implied
+// warranty. In no event will the authors be held liable for any damages
+// arising from the use of this software.
+//
+// Permission is granted to anyone to use this software for any purpose,
+// including commercial applications, and to alter it and redistribute it
+// freely, subject to the following restrictions:
+//
+// 1. The origin of this software must not be misrepresented; you must not
+// claim that you wrote the original software. If you use this software
+// in a product, an acknowledgment in the product documentation would be
+// appreciated but is not required.
+// 2. Altered source versions must be plainly marked as such, and must not be
+// misrepresented as being the original software.
+// 3. This notice may not be removed or altered from any source distribution.
+
+var utils = require('../utils/common');
+var adler32 = require('./adler32');
+var crc32 = require('./crc32');
+var inflate_fast = require('./inffast');
+var inflate_table = require('./inftrees');
+
+var CODES = 0;
+var LENS = 1;
+var DISTS = 2;
+
+/* Public constants ==========================================================*/
+/* ===========================================================================*/
+
+
+/* Allowed flush values; see deflate() and inflate() below for details */
+//var Z_NO_FLUSH = 0;
+//var Z_PARTIAL_FLUSH = 1;
+//var Z_SYNC_FLUSH = 2;
+//var Z_FULL_FLUSH = 3;
+var Z_FINISH = 4;
+var Z_BLOCK = 5;
+var Z_TREES = 6;
+
+
+/* Return codes for the compression/decompression functions. Negative values
+ * are errors, positive values are used for special but normal events.
+ */
+var Z_OK = 0;
+var Z_STREAM_END = 1;
+var Z_NEED_DICT = 2;
+//var Z_ERRNO = -1;
+var Z_STREAM_ERROR = -2;
+var Z_DATA_ERROR = -3;
+var Z_MEM_ERROR = -4;
+var Z_BUF_ERROR = -5;
+//var Z_VERSION_ERROR = -6;
+
+/* The deflate compression method */
+var Z_DEFLATED = 8;
+
+
+/* STATES ====================================================================*/
+/* ===========================================================================*/
+
+
+var HEAD = 1; /* i: waiting for magic header */
+var FLAGS = 2; /* i: waiting for method and flags (gzip) */
+var TIME = 3; /* i: waiting for modification time (gzip) */
+var OS = 4; /* i: waiting for extra flags and operating system (gzip) */
+var EXLEN = 5; /* i: waiting for extra length (gzip) */
+var EXTRA = 6; /* i: waiting for extra bytes (gzip) */
+var NAME = 7; /* i: waiting for end of file name (gzip) */
+var COMMENT = 8; /* i: waiting for end of comment (gzip) */
+var HCRC = 9; /* i: waiting for header crc (gzip) */
+var DICTID = 10; /* i: waiting for dictionary check value */
+var DICT = 11; /* waiting for inflateSetDictionary() call */
+var TYPE = 12; /* i: waiting for type bits, including last-flag bit */
+var TYPEDO = 13; /* i: same, but skip check to exit inflate on new block */
+var STORED = 14; /* i: waiting for stored size (length and complement) */
+var COPY_ = 15; /* i/o: same as COPY below, but only first time in */
+var COPY = 16; /* i/o: waiting for input or output to copy stored block */
+var TABLE = 17; /* i: waiting for dynamic block table lengths */
+var LENLENS = 18; /* i: waiting for code length code lengths */
+var CODELENS = 19; /* i: waiting for length/lit and distance code lengths */
+var LEN_ = 20; /* i: same as LEN below, but only first time in */
+var LEN = 21; /* i: waiting for length/lit/eob code */
+var LENEXT = 22; /* i: waiting for length extra bits */
+var DIST = 23; /* i: waiting for distance code */
+var DISTEXT = 24; /* i: waiting for distance extra bits */
+var MATCH = 25; /* o: waiting for output space to copy string */
+var LIT = 26; /* o: waiting for output space to write literal */
+var CHECK = 27; /* i: waiting for 32-bit check value */
+var LENGTH = 28; /* i: waiting for 32-bit length (gzip) */
+var DONE = 29; /* finished check, done -- remain here until reset */
+var BAD = 30; /* got a data error -- remain here until reset */
+var MEM = 31; /* got an inflate() memory error -- remain here until reset */
+var SYNC = 32; /* looking for synchronization bytes to restart inflate() */
+
+/* ===========================================================================*/
+
+
+
+var ENOUGH_LENS = 852;
+var ENOUGH_DISTS = 592;
+//var ENOUGH = (ENOUGH_LENS+ENOUGH_DISTS);
+
+var MAX_WBITS = 15;
+/* 32K LZ77 window */
+var DEF_WBITS = MAX_WBITS;
+
+
+function zswap32(q) {
+ return (((q >>> 24) & 0xff) +
+ ((q >>> 8) & 0xff00) +
+ ((q & 0xff00) << 8) +
+ ((q & 0xff) << 24));
+}
+
+
+function InflateState() {
+ this.mode = 0; /* current inflate mode */
+ this.last = false; /* true if processing last block */
+ this.wrap = 0; /* bit 0 true for zlib, bit 1 true for gzip */
+ this.havedict = false; /* true if dictionary provided */
+ this.flags = 0; /* gzip header method and flags (0 if zlib) */
+ this.dmax = 0; /* zlib header max distance (INFLATE_STRICT) */
+ this.check = 0; /* protected copy of check value */
+ this.total = 0; /* protected copy of output count */
+ // TODO: may be {}
+ this.head = null; /* where to save gzip header information */
+
+ /* sliding window */
+ this.wbits = 0; /* log base 2 of requested window size */
+ this.wsize = 0; /* window size or zero if not using window */
+ this.whave = 0; /* valid bytes in the window */
+ this.wnext = 0; /* window write index */
+ this.window = null; /* allocated sliding window, if needed */
+
+ /* bit accumulator */
+ this.hold = 0; /* input bit accumulator */
+ this.bits = 0; /* number of bits in "in" */
+
+ /* for string and stored block copying */
+ this.length = 0; /* literal or length of data to copy */
+ this.offset = 0; /* distance back to copy string from */
+
+ /* for table and code decoding */
+ this.extra = 0; /* extra bits needed */
+
+ /* fixed and dynamic code tables */
+ this.lencode = null; /* starting table for length/literal codes */
+ this.distcode = null; /* starting table for distance codes */
+ this.lenbits = 0; /* index bits for lencode */
+ this.distbits = 0; /* index bits for distcode */
+
+ /* dynamic table building */
+ this.ncode = 0; /* number of code length code lengths */
+ this.nlen = 0; /* number of length code lengths */
+ this.ndist = 0; /* number of distance code lengths */
+ this.have = 0; /* number of code lengths in lens[] */
+ this.next = null; /* next available space in codes[] */
+
+ this.lens = new utils.Buf16(320); /* temporary storage for code lengths */
+ this.work = new utils.Buf16(288); /* work area for code table building */
+
+ /*
+ because we don't have pointers in js, we use lencode and distcode directly
+ as buffers so we don't need codes
+ */
+ //this.codes = new utils.Buf32(ENOUGH); /* space for code tables */
+ this.lendyn = null; /* dynamic table for length/literal codes (JS specific) */
+ this.distdyn = null; /* dynamic table for distance codes (JS specific) */
+ this.sane = 0; /* if false, allow invalid distance too far */
+ this.back = 0; /* bits back of last unprocessed length/lit */
+ this.was = 0; /* initial length of match */
+}
+
+function inflateResetKeep(strm) {
+ var state;
+
+ if (!strm || !strm.state) { return Z_STREAM_ERROR; }
+ state = strm.state;
+ strm.total_in = strm.total_out = state.total = 0;
+ strm.msg = ''; /*Z_NULL*/
+ if (state.wrap) { /* to support ill-conceived Java test suite */
+ strm.adler = state.wrap & 1;
+ }
+ state.mode = HEAD;
+ state.last = 0;
+ state.havedict = 0;
+ state.dmax = 32768;
+ state.head = null/*Z_NULL*/;
+ state.hold = 0;
+ state.bits = 0;
+ //state.lencode = state.distcode = state.next = state.codes;
+ state.lencode = state.lendyn = new utils.Buf32(ENOUGH_LENS);
+ state.distcode = state.distdyn = new utils.Buf32(ENOUGH_DISTS);
+
+ state.sane = 1;
+ state.back = -1;
+ //Tracev((stderr, "inflate: reset\n"));
+ return Z_OK;
+}
+
+function inflateReset(strm) {
+ var state;
+
+ if (!strm || !strm.state) { return Z_STREAM_ERROR; }
+ state = strm.state;
+ state.wsize = 0;
+ state.whave = 0;
+ state.wnext = 0;
+ return inflateResetKeep(strm);
+
+}
+
+function inflateReset2(strm, windowBits) {
+ var wrap;
+ var state;
+
+ /* get the state */
+ if (!strm || !strm.state) { return Z_STREAM_ERROR; }
+ state = strm.state;
+
+ /* extract wrap request from windowBits parameter */
+ if (windowBits < 0) {
+ wrap = 0;
+ windowBits = -windowBits;
+ }
+ else {
+ wrap = (windowBits >> 4) + 1;
+ if (windowBits < 48) {
+ windowBits &= 15;
+ }
+ }
+
+ /* set number of window bits, free window if different */
+ if (windowBits && (windowBits < 8 || windowBits > 15)) {
+ return Z_STREAM_ERROR;
+ }
+ if (state.window !== null && state.wbits !== windowBits) {
+ state.window = null;
+ }
+
+ /* update state and reset the rest of it */
+ state.wrap = wrap;
+ state.wbits = windowBits;
+ return inflateReset(strm);
+}
+
+function inflateInit2(strm, windowBits) {
+ var ret;
+ var state;
+
+ if (!strm) { return Z_STREAM_ERROR; }
+ //strm.msg = Z_NULL; /* in case we return an error */
+
+ state = new InflateState();
+
+ //if (state === Z_NULL) return Z_MEM_ERROR;
+ //Tracev((stderr, "inflate: allocated\n"));
+ strm.state = state;
+ state.window = null/*Z_NULL*/;
+ ret = inflateReset2(strm, windowBits);
+ if (ret !== Z_OK) {
+ strm.state = null/*Z_NULL*/;
+ }
+ return ret;
+}
+
+function inflateInit(strm) {
+ return inflateInit2(strm, DEF_WBITS);
+}
+
+
+/*
+ Return state with length and distance decoding tables and index sizes set to
+ fixed code decoding. Normally this returns fixed tables from inffixed.h.
+ If BUILDFIXED is defined, then instead this routine builds the tables the
+ first time it's called, and returns those tables the first time and
+ thereafter. This reduces the size of the code by about 2K bytes, in
+ exchange for a little execution time. However, BUILDFIXED should not be
+ used for threaded applications, since the rewriting of the tables and virgin
+ may not be thread-safe.
+ */
+var virgin = true;
+
+var lenfix, distfix; // We have no pointers in JS, so keep tables separate
+
+function fixedtables(state) {
+ /* build fixed huffman tables if first call (may not be thread safe) */
+ if (virgin) {
+ var sym;
+
+ lenfix = new utils.Buf32(512);
+ distfix = new utils.Buf32(32);
+
+ /* literal/length table */
+ sym = 0;
+ while (sym < 144) { state.lens[sym++] = 8; }
+ while (sym < 256) { state.lens[sym++] = 9; }
+ while (sym < 280) { state.lens[sym++] = 7; }
+ while (sym < 288) { state.lens[sym++] = 8; }
+
+ inflate_table(LENS, state.lens, 0, 288, lenfix, 0, state.work, { bits: 9 });
+
+ /* distance table */
+ sym = 0;
+ while (sym < 32) { state.lens[sym++] = 5; }
+
+ inflate_table(DISTS, state.lens, 0, 32, distfix, 0, state.work, { bits: 5 });
+
+ /* do this just once */
+ virgin = false;
+ }
+
+ state.lencode = lenfix;
+ state.lenbits = 9;
+ state.distcode = distfix;
+ state.distbits = 5;
+}
+
+
+/*
+ Update the window with the last wsize (normally 32K) bytes written before
+ returning. If window does not exist yet, create it. This is only called
+ when a window is already in use, or when output has been written during this
+ inflate call, but the end of the deflate stream has not been reached yet.
+ It is also called to create a window for dictionary data when a dictionary
+ is loaded.
+
+ Providing output buffers larger than 32K to inflate() should provide a speed
+ advantage, since only the last 32K of output is copied to the sliding window
+ upon return from inflate(), and since all distances after the first 32K of
+ output will fall in the output data, making match copies simpler and faster.
+ The advantage may be dependent on the size of the processor's data caches.
+ */
+function updatewindow(strm, src, end, copy) {
+ var dist;
+ var state = strm.state;
+
+ /* if it hasn't been done already, allocate space for the window */
+ if (state.window === null) {
+ state.wsize = 1 << state.wbits;
+ state.wnext = 0;
+ state.whave = 0;
+
+ state.window = new utils.Buf8(state.wsize);
+ }
+
+ /* copy state->wsize or less output bytes into the circular window */
+ if (copy >= state.wsize) {
+ utils.arraySet(state.window, src, end - state.wsize, state.wsize, 0);
+ state.wnext = 0;
+ state.whave = state.wsize;
+ }
+ else {
+ dist = state.wsize - state.wnext;
+ if (dist > copy) {
+ dist = copy;
+ }
+ //zmemcpy(state->window + state->wnext, end - copy, dist);
+ utils.arraySet(state.window, src, end - copy, dist, state.wnext);
+ copy -= dist;
+ if (copy) {
+ //zmemcpy(state->window, end - copy, copy);
+ utils.arraySet(state.window, src, end - copy, copy, 0);
+ state.wnext = copy;
+ state.whave = state.wsize;
+ }
+ else {
+ state.wnext += dist;
+ if (state.wnext === state.wsize) { state.wnext = 0; }
+ if (state.whave < state.wsize) { state.whave += dist; }
+ }
+ }
+ return 0;
+}
+
+function inflate(strm, flush) {
+ var state;
+ var input, output; // input/output buffers
+ var next; /* next input INDEX */
+ var put; /* next output INDEX */
+ var have, left; /* available input and output */
+ var hold; /* bit buffer */
+ var bits; /* bits in bit buffer */
+ var _in, _out; /* save starting available input and output */
+ var copy; /* number of stored or match bytes to copy */
+ var from; /* where to copy match bytes from */
+ var from_source;
+ var here = 0; /* current decoding table entry */
+ var here_bits, here_op, here_val; // paked "here" denormalized (JS specific)
+ //var last; /* parent table entry */
+ var last_bits, last_op, last_val; // paked "last" denormalized (JS specific)
+ var len; /* length to copy for repeats, bits to drop */
+ var ret; /* return code */
+ var hbuf = new utils.Buf8(4); /* buffer for gzip header crc calculation */
+ var opts;
+
+ var n; // temporary var for NEED_BITS
+
+ var order = /* permutation of code lengths */
+ [ 16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15 ];
+
+
+ if (!strm || !strm.state || !strm.output ||
+ (!strm.input && strm.avail_in !== 0)) {
+ return Z_STREAM_ERROR;
+ }
+
+ state = strm.state;
+ if (state.mode === TYPE) { state.mode = TYPEDO; } /* skip check */
+
+
+ //--- LOAD() ---
+ put = strm.next_out;
+ output = strm.output;
+ left = strm.avail_out;
+ next = strm.next_in;
+ input = strm.input;
+ have = strm.avail_in;
+ hold = state.hold;
+ bits = state.bits;
+ //---
+
+ _in = have;
+ _out = left;
+ ret = Z_OK;
+
+ inf_leave: // goto emulation
+ for (;;) {
+ switch (state.mode) {
+ case HEAD:
+ if (state.wrap === 0) {
+ state.mode = TYPEDO;
+ break;
+ }
+ //=== NEEDBITS(16);
+ while (bits < 16) {
+ if (have === 0) { break inf_leave; }
+ have--;
+ hold += input[next++] << bits;
+ bits += 8;
+ }
+ //===//
+ if ((state.wrap & 2) && hold === 0x8b1f) { /* gzip header */
+ state.check = 0/*crc32(0L, Z_NULL, 0)*/;
+ //=== CRC2(state.check, hold);
+ hbuf[0] = hold & 0xff;
+ hbuf[1] = (hold >>> 8) & 0xff;
+ state.check = crc32(state.check, hbuf, 2, 0);
+ //===//
+
+ //=== INITBITS();
+ hold = 0;
+ bits = 0;
+ //===//
+ state.mode = FLAGS;
+ break;
+ }
+ state.flags = 0; /* expect zlib header */
+ if (state.head) {
+ state.head.done = false;
+ }
+ if (!(state.wrap & 1) || /* check if zlib header allowed */
+ (((hold & 0xff)/*BITS(8)*/ << 8) + (hold >> 8)) % 31) {
+ strm.msg = 'incorrect header check';
+ state.mode = BAD;
+ break;
+ }
+ if ((hold & 0x0f)/*BITS(4)*/ !== Z_DEFLATED) {
+ strm.msg = 'unknown compression method';
+ state.mode = BAD;
+ break;
+ }
+ //--- DROPBITS(4) ---//
+ hold >>>= 4;
+ bits -= 4;
+ //---//
+ len = (hold & 0x0f)/*BITS(4)*/ + 8;
+ if (state.wbits === 0) {
+ state.wbits = len;
+ }
+ else if (len > state.wbits) {
+ strm.msg = 'invalid window size';
+ state.mode = BAD;
+ break;
+ }
+ state.dmax = 1 << len;
+ //Tracev((stderr, "inflate: zlib header ok\n"));
+ strm.adler = state.check = 1/*adler32(0L, Z_NULL, 0)*/;
+ state.mode = hold & 0x200 ? DICTID : TYPE;
+ //=== INITBITS();
+ hold = 0;
+ bits = 0;
+ //===//
+ break;
+ case FLAGS:
+ //=== NEEDBITS(16); */
+ while (bits < 16) {
+ if (have === 0) { break inf_leave; }
+ have--;
+ hold += input[next++] << bits;
+ bits += 8;
+ }
+ //===//
+ state.flags = hold;
+ if ((state.flags & 0xff) !== Z_DEFLATED) {
+ strm.msg = 'unknown compression method';
+ state.mode = BAD;
+ break;
+ }
+ if (state.flags & 0xe000) {
+ strm.msg = 'unknown header flags set';
+ state.mode = BAD;
+ break;
+ }
+ if (state.head) {
+ state.head.text = ((hold >> 8) & 1);
+ }
+ if (state.flags & 0x0200) {
+ //=== CRC2(state.check, hold);
+ hbuf[0] = hold & 0xff;
+ hbuf[1] = (hold >>> 8) & 0xff;
+ state.check = crc32(state.check, hbuf, 2, 0);
+ //===//
+ }
+ //=== INITBITS();
+ hold = 0;
+ bits = 0;
+ //===//
+ state.mode = TIME;
+ /* falls through */
+ case TIME:
+ //=== NEEDBITS(32); */
+ while (bits < 32) {
+ if (have === 0) { break inf_leave; }
+ have--;
+ hold += input[next++] << bits;
+ bits += 8;
+ }
+ //===//
+ if (state.head) {
+ state.head.time = hold;
+ }
+ if (state.flags & 0x0200) {
+ //=== CRC4(state.check, hold)
+ hbuf[0] = hold & 0xff;
+ hbuf[1] = (hold >>> 8) & 0xff;
+ hbuf[2] = (hold >>> 16) & 0xff;
+ hbuf[3] = (hold >>> 24) & 0xff;
+ state.check = crc32(state.check, hbuf, 4, 0);
+ //===
+ }
+ //=== INITBITS();
+ hold = 0;
+ bits = 0;
+ //===//
+ state.mode = OS;
+ /* falls through */
+ case OS:
+ //=== NEEDBITS(16); */
+ while (bits < 16) {
+ if (have === 0) { break inf_leave; }
+ have--;
+ hold += input[next++] << bits;
+ bits += 8;
+ }
+ //===//
+ if (state.head) {
+ state.head.xflags = (hold & 0xff);
+ state.head.os = (hold >> 8);
+ }
+ if (state.flags & 0x0200) {
+ //=== CRC2(state.check, hold);
+ hbuf[0] = hold & 0xff;
+ hbuf[1] = (hold >>> 8) & 0xff;
+ state.check = crc32(state.check, hbuf, 2, 0);
+ //===//
+ }
+ //=== INITBITS();
+ hold = 0;
+ bits = 0;
+ //===//
+ state.mode = EXLEN;
+ /* falls through */
+ case EXLEN:
+ if (state.flags & 0x0400) {
+ //=== NEEDBITS(16); */
+ while (bits < 16) {
+ if (have === 0) { break inf_leave; }
+ have--;
+ hold += input[next++] << bits;
+ bits += 8;
+ }
+ //===//
+ state.length = hold;
+ if (state.head) {
+ state.head.extra_len = hold;
+ }
+ if (state.flags & 0x0200) {
+ //=== CRC2(state.check, hold);
+ hbuf[0] = hold & 0xff;
+ hbuf[1] = (hold >>> 8) & 0xff;
+ state.check = crc32(state.check, hbuf, 2, 0);
+ //===//
+ }
+ //=== INITBITS();
+ hold = 0;
+ bits = 0;
+ //===//
+ }
+ else if (state.head) {
+ state.head.extra = null/*Z_NULL*/;
+ }
+ state.mode = EXTRA;
+ /* falls through */
+ case EXTRA:
+ if (state.flags & 0x0400) {
+ copy = state.length;
+ if (copy > have) { copy = have; }
+ if (copy) {
+ if (state.head) {
+ len = state.head.extra_len - state.length;
+ if (!state.head.extra) {
+ // Use untyped array for more convenient processing later
+ state.head.extra = new Array(state.head.extra_len);
+ }
+ utils.arraySet(
+ state.head.extra,
+ input,
+ next,
+ // extra field is limited to 65536 bytes
+ // - no need for additional size check
+ copy,
+ /*len + copy > state.head.extra_max - len ? state.head.extra_max : copy,*/
+ len
+ );
+ //zmemcpy(state.head.extra + len, next,
+ // len + copy > state.head.extra_max ?
+ // state.head.extra_max - len : copy);
+ }
+ if (state.flags & 0x0200) {
+ state.check = crc32(state.check, input, copy, next);
+ }
+ have -= copy;
+ next += copy;
+ state.length -= copy;
+ }
+ if (state.length) { break inf_leave; }
+ }
+ state.length = 0;
+ state.mode = NAME;
+ /* falls through */
+ case NAME:
+ if (state.flags & 0x0800) {
+ if (have === 0) { break inf_leave; }
+ copy = 0;
+ do {
+ // TODO: 2 or 1 bytes?
+ len = input[next + copy++];
+ /* use constant limit because in js we should not preallocate memory */
+ if (state.head && len &&
+ (state.length < 65536 /*state.head.name_max*/)) {
+ state.head.name += String.fromCharCode(len);
+ }
+ } while (len && copy < have);
+
+ if (state.flags & 0x0200) {
+ state.check = crc32(state.check, input, copy, next);
+ }
+ have -= copy;
+ next += copy;
+ if (len) { break inf_leave; }
+ }
+ else if (state.head) {
+ state.head.name = null;
+ }
+ state.length = 0;
+ state.mode = COMMENT;
+ /* falls through */
+ case COMMENT:
+ if (state.flags & 0x1000) {
+ if (have === 0) { break inf_leave; }
+ copy = 0;
+ do {
+ len = input[next + copy++];
+ /* use constant limit because in js we should not preallocate memory */
+ if (state.head && len &&
+ (state.length < 65536 /*state.head.comm_max*/)) {
+ state.head.comment += String.fromCharCode(len);
+ }
+ } while (len && copy < have);
+ if (state.flags & 0x0200) {
+ state.check = crc32(state.check, input, copy, next);
+ }
+ have -= copy;
+ next += copy;
+ if (len) { break inf_leave; }
+ }
+ else if (state.head) {
+ state.head.comment = null;
+ }
+ state.mode = HCRC;
+ /* falls through */
+ case HCRC:
+ if (state.flags & 0x0200) {
+ //=== NEEDBITS(16); */
+ while (bits < 16) {
+ if (have === 0) { break inf_leave; }
+ have--;
+ hold += input[next++] << bits;
+ bits += 8;
+ }
+ //===//
+ if (hold !== (state.check & 0xffff)) {
+ strm.msg = 'header crc mismatch';
+ state.mode = BAD;
+ break;
+ }
+ //=== INITBITS();
+ hold = 0;
+ bits = 0;
+ //===//
+ }
+ if (state.head) {
+ state.head.hcrc = ((state.flags >> 9) & 1);
+ state.head.done = true;
+ }
+ strm.adler = state.check = 0;
+ state.mode = TYPE;
+ break;
+ case DICTID:
+ //=== NEEDBITS(32); */
+ while (bits < 32) {
+ if (have === 0) { break inf_leave; }
+ have--;
+ hold += input[next++] << bits;
+ bits += 8;
+ }
+ //===//
+ strm.adler = state.check = zswap32(hold);
+ //=== INITBITS();
+ hold = 0;
+ bits = 0;
+ //===//
+ state.mode = DICT;
+ /* falls through */
+ case DICT:
+ if (state.havedict === 0) {
+ //--- RESTORE() ---
+ strm.next_out = put;
+ strm.avail_out = left;
+ strm.next_in = next;
+ strm.avail_in = have;
+ state.hold = hold;
+ state.bits = bits;
+ //---
+ return Z_NEED_DICT;
+ }
+ strm.adler = state.check = 1/*adler32(0L, Z_NULL, 0)*/;
+ state.mode = TYPE;
+ /* falls through */
+ case TYPE:
+ if (flush === Z_BLOCK || flush === Z_TREES) { break inf_leave; }
+ /* falls through */
+ case TYPEDO:
+ if (state.last) {
+ //--- BYTEBITS() ---//
+ hold >>>= bits & 7;
+ bits -= bits & 7;
+ //---//
+ state.mode = CHECK;
+ break;
+ }
+ //=== NEEDBITS(3); */
+ while (bits < 3) {
+ if (have === 0) { break inf_leave; }
+ have--;
+ hold += input[next++] << bits;
+ bits += 8;
+ }
+ //===//
+ state.last = (hold & 0x01)/*BITS(1)*/;
+ //--- DROPBITS(1) ---//
+ hold >>>= 1;
+ bits -= 1;
+ //---//
+
+ switch ((hold & 0x03)/*BITS(2)*/) {
+ case 0: /* stored block */
+ //Tracev((stderr, "inflate: stored block%s\n",
+ // state.last ? " (last)" : ""));
+ state.mode = STORED;
+ break;
+ case 1: /* fixed block */
+ fixedtables(state);
+ //Tracev((stderr, "inflate: fixed codes block%s\n",
+ // state.last ? " (last)" : ""));
+ state.mode = LEN_; /* decode codes */
+ if (flush === Z_TREES) {
+ //--- DROPBITS(2) ---//
+ hold >>>= 2;
+ bits -= 2;
+ //---//
+ break inf_leave;
+ }
+ break;
+ case 2: /* dynamic block */
+ //Tracev((stderr, "inflate: dynamic codes block%s\n",
+ // state.last ? " (last)" : ""));
+ state.mode = TABLE;
+ break;
+ case 3:
+ strm.msg = 'invalid block type';
+ state.mode = BAD;
+ }
+ //--- DROPBITS(2) ---//
+ hold >>>= 2;
+ bits -= 2;
+ //---//
+ break;
+ case STORED:
+ //--- BYTEBITS() ---// /* go to byte boundary */
+ hold >>>= bits & 7;
+ bits -= bits & 7;
+ //---//
+ //=== NEEDBITS(32); */
+ while (bits < 32) {
+ if (have === 0) { break inf_leave; }
+ have--;
+ hold += input[next++] << bits;
+ bits += 8;
+ }
+ //===//
+ if ((hold & 0xffff) !== ((hold >>> 16) ^ 0xffff)) {
+ strm.msg = 'invalid stored block lengths';
+ state.mode = BAD;
+ break;
+ }
+ state.length = hold & 0xffff;
+ //Tracev((stderr, "inflate: stored length %u\n",
+ // state.length));
+ //=== INITBITS();
+ hold = 0;
+ bits = 0;
+ //===//
+ state.mode = COPY_;
+ if (flush === Z_TREES) { break inf_leave; }
+ /* falls through */
+ case COPY_:
+ state.mode = COPY;
+ /* falls through */
+ case COPY:
+ copy = state.length;
+ if (copy) {
+ if (copy > have) { copy = have; }
+ if (copy > left) { copy = left; }
+ if (copy === 0) { break inf_leave; }
+ //--- zmemcpy(put, next, copy); ---
+ utils.arraySet(output, input, next, copy, put);
+ //---//
+ have -= copy;
+ next += copy;
+ left -= copy;
+ put += copy;
+ state.length -= copy;
+ break;
+ }
+ //Tracev((stderr, "inflate: stored end\n"));
+ state.mode = TYPE;
+ break;
+ case TABLE:
+ //=== NEEDBITS(14); */
+ while (bits < 14) {
+ if (have === 0) { break inf_leave; }
+ have--;
+ hold += input[next++] << bits;
+ bits += 8;
+ }
+ //===//
+ state.nlen = (hold & 0x1f)/*BITS(5)*/ + 257;
+ //--- DROPBITS(5) ---//
+ hold >>>= 5;
+ bits -= 5;
+ //---//
+ state.ndist = (hold & 0x1f)/*BITS(5)*/ + 1;
+ //--- DROPBITS(5) ---//
+ hold >>>= 5;
+ bits -= 5;
+ //---//
+ state.ncode = (hold & 0x0f)/*BITS(4)*/ + 4;
+ //--- DROPBITS(4) ---//
+ hold >>>= 4;
+ bits -= 4;
+ //---//
+//#ifndef PKZIP_BUG_WORKAROUND
+ if (state.nlen > 286 || state.ndist > 30) {
+ strm.msg = 'too many length or distance symbols';
+ state.mode = BAD;
+ break;
+ }
+//#endif
+ //Tracev((stderr, "inflate: table sizes ok\n"));
+ state.have = 0;
+ state.mode = LENLENS;
+ /* falls through */
+ case LENLENS:
+ while (state.have < state.ncode) {
+ //=== NEEDBITS(3);
+ while (bits < 3) {
+ if (have === 0) { break inf_leave; }
+ have--;
+ hold += input[next++] << bits;
+ bits += 8;
+ }
+ //===//
+ state.lens[order[state.have++]] = (hold & 0x07);//BITS(3);
+ //--- DROPBITS(3) ---//
+ hold >>>= 3;
+ bits -= 3;
+ //---//
+ }
+ while (state.have < 19) {
+ state.lens[order[state.have++]] = 0;
+ }
+ // We have separate tables & no pointers. 2 commented lines below not needed.
+ //state.next = state.codes;
+ //state.lencode = state.next;
+ // Switch to use dynamic table
+ state.lencode = state.lendyn;
+ state.lenbits = 7;
+
+ opts = { bits: state.lenbits };
+ ret = inflate_table(CODES, state.lens, 0, 19, state.lencode, 0, state.work, opts);
+ state.lenbits = opts.bits;
+
+ if (ret) {
+ strm.msg = 'invalid code lengths set';
+ state.mode = BAD;
+ break;
+ }
+ //Tracev((stderr, "inflate: code lengths ok\n"));
+ state.have = 0;
+ state.mode = CODELENS;
+ /* falls through */
+ case CODELENS:
+ while (state.have < state.nlen + state.ndist) {
+ for (;;) {
+ here = state.lencode[hold & ((1 << state.lenbits) - 1)];/*BITS(state.lenbits)*/
+ here_bits = here >>> 24;
+ here_op = (here >>> 16) & 0xff;
+ here_val = here & 0xffff;
+
+ if ((here_bits) <= bits) { break; }
+ //--- PULLBYTE() ---//
+ if (have === 0) { break inf_leave; }
+ have--;
+ hold += input[next++] << bits;
+ bits += 8;
+ //---//
+ }
+ if (here_val < 16) {
+ //--- DROPBITS(here.bits) ---//
+ hold >>>= here_bits;
+ bits -= here_bits;
+ //---//
+ state.lens[state.have++] = here_val;
+ }
+ else {
+ if (here_val === 16) {
+ //=== NEEDBITS(here.bits + 2);
+ n = here_bits + 2;
+ while (bits < n) {
+ if (have === 0) { break inf_leave; }
+ have--;
+ hold += input[next++] << bits;
+ bits += 8;
+ }
+ //===//
+ //--- DROPBITS(here.bits) ---//
+ hold >>>= here_bits;
+ bits -= here_bits;
+ //---//
+ if (state.have === 0) {
+ strm.msg = 'invalid bit length repeat';
+ state.mode = BAD;
+ break;
+ }
+ len = state.lens[state.have - 1];
+ copy = 3 + (hold & 0x03);//BITS(2);
+ //--- DROPBITS(2) ---//
+ hold >>>= 2;
+ bits -= 2;
+ //---//
+ }
+ else if (here_val === 17) {
+ //=== NEEDBITS(here.bits + 3);
+ n = here_bits + 3;
+ while (bits < n) {
+ if (have === 0) { break inf_leave; }
+ have--;
+ hold += input[next++] << bits;
+ bits += 8;
+ }
+ //===//
+ //--- DROPBITS(here.bits) ---//
+ hold >>>= here_bits;
+ bits -= here_bits;
+ //---//
+ len = 0;
+ copy = 3 + (hold & 0x07);//BITS(3);
+ //--- DROPBITS(3) ---//
+ hold >>>= 3;
+ bits -= 3;
+ //---//
+ }
+ else {
+ //=== NEEDBITS(here.bits + 7);
+ n = here_bits + 7;
+ while (bits < n) {
+ if (have === 0) { break inf_leave; }
+ have--;
+ hold += input[next++] << bits;
+ bits += 8;
+ }
+ //===//
+ //--- DROPBITS(here.bits) ---//
+ hold >>>= here_bits;
+ bits -= here_bits;
+ //---//
+ len = 0;
+ copy = 11 + (hold & 0x7f);//BITS(7);
+ //--- DROPBITS(7) ---//
+ hold >>>= 7;
+ bits -= 7;
+ //---//
+ }
+ if (state.have + copy > state.nlen + state.ndist) {
+ strm.msg = 'invalid bit length repeat';
+ state.mode = BAD;
+ break;
+ }
+ while (copy--) {
+ state.lens[state.have++] = len;
+ }
+ }
+ }
+
+ /* handle error breaks in while */
+ if (state.mode === BAD) { break; }
+
+ /* check for end-of-block code (better have one) */
+ if (state.lens[256] === 0) {
+ strm.msg = 'invalid code -- missing end-of-block';
+ state.mode = BAD;
+ break;
+ }
+
+ /* build code tables -- note: do not change the lenbits or distbits
+ values here (9 and 6) without reading the comments in inftrees.h
+ concerning the ENOUGH constants, which depend on those values */
+ state.lenbits = 9;
+
+ opts = { bits: state.lenbits };
+ ret = inflate_table(LENS, state.lens, 0, state.nlen, state.lencode, 0, state.work, opts);
+ // We have separate tables & no pointers. 2 commented lines below not needed.
+ // state.next_index = opts.table_index;
+ state.lenbits = opts.bits;
+ // state.lencode = state.next;
+
+ if (ret) {
+ strm.msg = 'invalid literal/lengths set';
+ state.mode = BAD;
+ break;
+ }
+
+ state.distbits = 6;
+ //state.distcode.copy(state.codes);
+ // Switch to use dynamic table
+ state.distcode = state.distdyn;
+ opts = { bits: state.distbits };
+ ret = inflate_table(DISTS, state.lens, state.nlen, state.ndist, state.distcode, 0, state.work, opts);
+ // We have separate tables & no pointers. 2 commented lines below not needed.
+ // state.next_index = opts.table_index;
+ state.distbits = opts.bits;
+ // state.distcode = state.next;
+
+ if (ret) {
+ strm.msg = 'invalid distances set';
+ state.mode = BAD;
+ break;
+ }
+ //Tracev((stderr, 'inflate: codes ok\n'));
+ state.mode = LEN_;
+ if (flush === Z_TREES) { break inf_leave; }
+ /* falls through */
+ case LEN_:
+ state.mode = LEN;
+ /* falls through */
+ case LEN:
+ if (have >= 6 && left >= 258) {
+ //--- RESTORE() ---
+ strm.next_out = put;
+ strm.avail_out = left;
+ strm.next_in = next;
+ strm.avail_in = have;
+ state.hold = hold;
+ state.bits = bits;
+ //---
+ inflate_fast(strm, _out);
+ //--- LOAD() ---
+ put = strm.next_out;
+ output = strm.output;
+ left = strm.avail_out;
+ next = strm.next_in;
+ input = strm.input;
+ have = strm.avail_in;
+ hold = state.hold;
+ bits = state.bits;
+ //---
+
+ if (state.mode === TYPE) {
+ state.back = -1;
+ }
+ break;
+ }
+ state.back = 0;
+ for (;;) {
+ here = state.lencode[hold & ((1 << state.lenbits) - 1)]; /*BITS(state.lenbits)*/
+ here_bits = here >>> 24;
+ here_op = (here >>> 16) & 0xff;
+ here_val = here & 0xffff;
+
+ if (here_bits <= bits) { break; }
+ //--- PULLBYTE() ---//
+ if (have === 0) { break inf_leave; }
+ have--;
+ hold += input[next++] << bits;
+ bits += 8;
+ //---//
+ }
+ if (here_op && (here_op & 0xf0) === 0) {
+ last_bits = here_bits;
+ last_op = here_op;
+ last_val = here_val;
+ for (;;) {
+ here = state.lencode[last_val +
+ ((hold & ((1 << (last_bits + last_op)) - 1))/*BITS(last.bits + last.op)*/ >> last_bits)];
+ here_bits = here >>> 24;
+ here_op = (here >>> 16) & 0xff;
+ here_val = here & 0xffff;
+
+ if ((last_bits + here_bits) <= bits) { break; }
+ //--- PULLBYTE() ---//
+ if (have === 0) { break inf_leave; }
+ have--;
+ hold += input[next++] << bits;
+ bits += 8;
+ //---//
+ }
+ //--- DROPBITS(last.bits) ---//
+ hold >>>= last_bits;
+ bits -= last_bits;
+ //---//
+ state.back += last_bits;
+ }
+ //--- DROPBITS(here.bits) ---//
+ hold >>>= here_bits;
+ bits -= here_bits;
+ //---//
+ state.back += here_bits;
+ state.length = here_val;
+ if (here_op === 0) {
+ //Tracevv((stderr, here.val >= 0x20 && here.val < 0x7f ?
+ // "inflate: literal '%c'\n" :
+ // "inflate: literal 0x%02x\n", here.val));
+ state.mode = LIT;
+ break;
+ }
+ if (here_op & 32) {
+ //Tracevv((stderr, "inflate: end of block\n"));
+ state.back = -1;
+ state.mode = TYPE;
+ break;
+ }
+ if (here_op & 64) {
+ strm.msg = 'invalid literal/length code';
+ state.mode = BAD;
+ break;
+ }
+ state.extra = here_op & 15;
+ state.mode = LENEXT;
+ /* falls through */
+ case LENEXT:
+ if (state.extra) {
+ //=== NEEDBITS(state.extra);
+ n = state.extra;
+ while (bits < n) {
+ if (have === 0) { break inf_leave; }
+ have--;
+ hold += input[next++] << bits;
+ bits += 8;
+ }
+ //===//
+ state.length += hold & ((1 << state.extra) - 1)/*BITS(state.extra)*/;
+ //--- DROPBITS(state.extra) ---//
+ hold >>>= state.extra;
+ bits -= state.extra;
+ //---//
+ state.back += state.extra;
+ }
+ //Tracevv((stderr, "inflate: length %u\n", state.length));
+ state.was = state.length;
+ state.mode = DIST;
+ /* falls through */
+ case DIST:
+ for (;;) {
+ here = state.distcode[hold & ((1 << state.distbits) - 1)];/*BITS(state.distbits)*/
+ here_bits = here >>> 24;
+ here_op = (here >>> 16) & 0xff;
+ here_val = here & 0xffff;
+
+ if ((here_bits) <= bits) { break; }
+ //--- PULLBYTE() ---//
+ if (have === 0) { break inf_leave; }
+ have--;
+ hold += input[next++] << bits;
+ bits += 8;
+ //---//
+ }
+ if ((here_op & 0xf0) === 0) {
+ last_bits = here_bits;
+ last_op = here_op;
+ last_val = here_val;
+ for (;;) {
+ here = state.distcode[last_val +
+ ((hold & ((1 << (last_bits + last_op)) - 1))/*BITS(last.bits + last.op)*/ >> last_bits)];
+ here_bits = here >>> 24;
+ here_op = (here >>> 16) & 0xff;
+ here_val = here & 0xffff;
+
+ if ((last_bits + here_bits) <= bits) { break; }
+ //--- PULLBYTE() ---//
+ if (have === 0) { break inf_leave; }
+ have--;
+ hold += input[next++] << bits;
+ bits += 8;
+ //---//
+ }
+ //--- DROPBITS(last.bits) ---//
+ hold >>>= last_bits;
+ bits -= last_bits;
+ //---//
+ state.back += last_bits;
+ }
+ //--- DROPBITS(here.bits) ---//
+ hold >>>= here_bits;
+ bits -= here_bits;
+ //---//
+ state.back += here_bits;
+ if (here_op & 64) {
+ strm.msg = 'invalid distance code';
+ state.mode = BAD;
+ break;
+ }
+ state.offset = here_val;
+ state.extra = (here_op) & 15;
+ state.mode = DISTEXT;
+ /* falls through */
+ case DISTEXT:
+ if (state.extra) {
+ //=== NEEDBITS(state.extra);
+ n = state.extra;
+ while (bits < n) {
+ if (have === 0) { break inf_leave; }
+ have--;
+ hold += input[next++] << bits;
+ bits += 8;
+ }
+ //===//
+ state.offset += hold & ((1 << state.extra) - 1)/*BITS(state.extra)*/;
+ //--- DROPBITS(state.extra) ---//
+ hold >>>= state.extra;
+ bits -= state.extra;
+ //---//
+ state.back += state.extra;
+ }
+//#ifdef INFLATE_STRICT
+ if (state.offset > state.dmax) {
+ strm.msg = 'invalid distance too far back';
+ state.mode = BAD;
+ break;
+ }
+//#endif
+ //Tracevv((stderr, "inflate: distance %u\n", state.offset));
+ state.mode = MATCH;
+ /* falls through */
+ case MATCH:
+ if (left === 0) { break inf_leave; }
+ copy = _out - left;
+ if (state.offset > copy) { /* copy from window */
+ copy = state.offset - copy;
+ if (copy > state.whave) {
+ if (state.sane) {
+ strm.msg = 'invalid distance too far back';
+ state.mode = BAD;
+ break;
+ }
+// (!) This block is disabled in zlib defaults,
+// don't enable it for binary compatibility
+//#ifdef INFLATE_ALLOW_INVALID_DISTANCE_TOOFAR_ARRR
+// Trace((stderr, "inflate.c too far\n"));
+// copy -= state.whave;
+// if (copy > state.length) { copy = state.length; }
+// if (copy > left) { copy = left; }
+// left -= copy;
+// state.length -= copy;
+// do {
+// output[put++] = 0;
+// } while (--copy);
+// if (state.length === 0) { state.mode = LEN; }
+// break;
+//#endif
+ }
+ if (copy > state.wnext) {
+ copy -= state.wnext;
+ from = state.wsize - copy;
+ }
+ else {
+ from = state.wnext - copy;
+ }
+ if (copy > state.length) { copy = state.length; }
+ from_source = state.window;
+ }
+ else { /* copy from output */
+ from_source = output;
+ from = put - state.offset;
+ copy = state.length;
+ }
+ if (copy > left) { copy = left; }
+ left -= copy;
+ state.length -= copy;
+ do {
+ output[put++] = from_source[from++];
+ } while (--copy);
+ if (state.length === 0) { state.mode = LEN; }
+ break;
+ case LIT:
+ if (left === 0) { break inf_leave; }
+ output[put++] = state.length;
+ left--;
+ state.mode = LEN;
+ break;
+ case CHECK:
+ if (state.wrap) {
+ //=== NEEDBITS(32);
+ while (bits < 32) {
+ if (have === 0) { break inf_leave; }
+ have--;
+ // Use '|' instead of '+' to make sure that result is signed
+ hold |= input[next++] << bits;
+ bits += 8;
+ }
+ //===//
+ _out -= left;
+ strm.total_out += _out;
+ state.total += _out;
+ if (_out) {
+ strm.adler = state.check =
+ /*UPDATE(state.check, put - _out, _out);*/
+ (state.flags ? crc32(state.check, output, _out, put - _out) : adler32(state.check, output, _out, put - _out));
+
+ }
+ _out = left;
+ // NB: crc32 stored as signed 32-bit int, zswap32 returns signed too
+ if ((state.flags ? hold : zswap32(hold)) !== state.check) {
+ strm.msg = 'incorrect data check';
+ state.mode = BAD;
+ break;
+ }
+ //=== INITBITS();
+ hold = 0;
+ bits = 0;
+ //===//
+ //Tracev((stderr, "inflate: check matches trailer\n"));
+ }
+ state.mode = LENGTH;
+ /* falls through */
+ case LENGTH:
+ if (state.wrap && state.flags) {
+ //=== NEEDBITS(32);
+ while (bits < 32) {
+ if (have === 0) { break inf_leave; }
+ have--;
+ hold += input[next++] << bits;
+ bits += 8;
+ }
+ //===//
+ if (hold !== (state.total & 0xffffffff)) {
+ strm.msg = 'incorrect length check';
+ state.mode = BAD;
+ break;
+ }
+ //=== INITBITS();
+ hold = 0;
+ bits = 0;
+ //===//
+ //Tracev((stderr, "inflate: length matches trailer\n"));
+ }
+ state.mode = DONE;
+ /* falls through */
+ case DONE:
+ ret = Z_STREAM_END;
+ break inf_leave;
+ case BAD:
+ ret = Z_DATA_ERROR;
+ break inf_leave;
+ case MEM:
+ return Z_MEM_ERROR;
+ case SYNC:
+ /* falls through */
+ default:
+ return Z_STREAM_ERROR;
+ }
+ }
+
+ // inf_leave <- here is real place for "goto inf_leave", emulated via "break inf_leave"
+
+ /*
+ Return from inflate(), updating the total counts and the check value.
+ If there was no progress during the inflate() call, return a buffer
+ error. Call updatewindow() to create and/or update the window state.
+ Note: a memory error from inflate() is non-recoverable.
+ */
+
+ //--- RESTORE() ---
+ strm.next_out = put;
+ strm.avail_out = left;
+ strm.next_in = next;
+ strm.avail_in = have;
+ state.hold = hold;
+ state.bits = bits;
+ //---
+
+ if (state.wsize || (_out !== strm.avail_out && state.mode < BAD &&
+ (state.mode < CHECK || flush !== Z_FINISH))) {
+ if (updatewindow(strm, strm.output, strm.next_out, _out - strm.avail_out)) {
+ state.mode = MEM;
+ return Z_MEM_ERROR;
+ }
+ }
+ _in -= strm.avail_in;
+ _out -= strm.avail_out;
+ strm.total_in += _in;
+ strm.total_out += _out;
+ state.total += _out;
+ if (state.wrap && _out) {
+ strm.adler = state.check = /*UPDATE(state.check, strm.next_out - _out, _out);*/
+ (state.flags ? crc32(state.check, output, _out, strm.next_out - _out) : adler32(state.check, output, _out, strm.next_out - _out));
+ }
+ strm.data_type = state.bits + (state.last ? 64 : 0) +
+ (state.mode === TYPE ? 128 : 0) +
+ (state.mode === LEN_ || state.mode === COPY_ ? 256 : 0);
+ if (((_in === 0 && _out === 0) || flush === Z_FINISH) && ret === Z_OK) {
+ ret = Z_BUF_ERROR;
+ }
+ return ret;
+}
+
+function inflateEnd(strm) {
+
+ if (!strm || !strm.state /*|| strm->zfree == (free_func)0*/) {
+ return Z_STREAM_ERROR;
+ }
+
+ var state = strm.state;
+ if (state.window) {
+ state.window = null;
+ }
+ strm.state = null;
+ return Z_OK;
+}
+
+function inflateGetHeader(strm, head) {
+ var state;
+
+ /* check state */
+ if (!strm || !strm.state) { return Z_STREAM_ERROR; }
+ state = strm.state;
+ if ((state.wrap & 2) === 0) { return Z_STREAM_ERROR; }
+
+ /* save header structure */
+ state.head = head;
+ head.done = false;
+ return Z_OK;
+}
+
+function inflateSetDictionary(strm, dictionary) {
+ var dictLength = dictionary.length;
+
+ var state;
+ var dictid;
+ var ret;
+
+ /* check state */
+ if (!strm /* == Z_NULL */ || !strm.state /* == Z_NULL */) { return Z_STREAM_ERROR; }
+ state = strm.state;
+
+ if (state.wrap !== 0 && state.mode !== DICT) {
+ return Z_STREAM_ERROR;
+ }
+
+ /* check for correct dictionary identifier */
+ if (state.mode === DICT) {
+ dictid = 1; /* adler32(0, null, 0)*/
+ /* dictid = adler32(dictid, dictionary, dictLength); */
+ dictid = adler32(dictid, dictionary, dictLength, 0);
+ if (dictid !== state.check) {
+ return Z_DATA_ERROR;
+ }
+ }
+ /* copy dictionary to window using updatewindow(), which will amend the
+ existing dictionary if appropriate */
+ ret = updatewindow(strm, dictionary, dictLength, dictLength);
+ if (ret) {
+ state.mode = MEM;
+ return Z_MEM_ERROR;
+ }
+ state.havedict = 1;
+ // Tracev((stderr, "inflate: dictionary set\n"));
+ return Z_OK;
+}
+
+exports.inflateReset = inflateReset;
+exports.inflateReset2 = inflateReset2;
+exports.inflateResetKeep = inflateResetKeep;
+exports.inflateInit = inflateInit;
+exports.inflateInit2 = inflateInit2;
+exports.inflate = inflate;
+exports.inflateEnd = inflateEnd;
+exports.inflateGetHeader = inflateGetHeader;
+exports.inflateSetDictionary = inflateSetDictionary;
+exports.inflateInfo = 'pako inflate (from Nodeca project)';
+
+/* Not implemented
+exports.inflateCopy = inflateCopy;
+exports.inflateGetDictionary = inflateGetDictionary;
+exports.inflateMark = inflateMark;
+exports.inflatePrime = inflatePrime;
+exports.inflateSync = inflateSync;
+exports.inflateSyncPoint = inflateSyncPoint;
+exports.inflateUndermine = inflateUndermine;
+*/
+
+},{"../utils/common":3,"./adler32":5,"./crc32":7,"./inffast":10,"./inftrees":12}],12:[function(require,module,exports){
+'use strict';
+
+// (C) 1995-2013 Jean-loup Gailly and Mark Adler
+// (C) 2014-2017 Vitaly Puzrin and Andrey Tupitsin
+//
+// This software is provided 'as-is', without any express or implied
+// warranty. In no event will the authors be held liable for any damages
+// arising from the use of this software.
+//
+// Permission is granted to anyone to use this software for any purpose,
+// including commercial applications, and to alter it and redistribute it
+// freely, subject to the following restrictions:
+//
+// 1. The origin of this software must not be misrepresented; you must not
+// claim that you wrote the original software. If you use this software
+// in a product, an acknowledgment in the product documentation would be
+// appreciated but is not required.
+// 2. Altered source versions must be plainly marked as such, and must not be
+// misrepresented as being the original software.
+// 3. This notice may not be removed or altered from any source distribution.
+
+var utils = require('../utils/common');
+
+var MAXBITS = 15;
+var ENOUGH_LENS = 852;
+var ENOUGH_DISTS = 592;
+//var ENOUGH = (ENOUGH_LENS+ENOUGH_DISTS);
+
+var CODES = 0;
+var LENS = 1;
+var DISTS = 2;
+
+var lbase = [ /* Length codes 257..285 base */
+ 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 15, 17, 19, 23, 27, 31,
+ 35, 43, 51, 59, 67, 83, 99, 115, 131, 163, 195, 227, 258, 0, 0
+];
+
+var lext = [ /* Length codes 257..285 extra */
+ 16, 16, 16, 16, 16, 16, 16, 16, 17, 17, 17, 17, 18, 18, 18, 18,
+ 19, 19, 19, 19, 20, 20, 20, 20, 21, 21, 21, 21, 16, 72, 78
+];
+
+var dbase = [ /* Distance codes 0..29 base */
+ 1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, 49, 65, 97, 129, 193,
+ 257, 385, 513, 769, 1025, 1537, 2049, 3073, 4097, 6145,
+ 8193, 12289, 16385, 24577, 0, 0
+];
+
+var dext = [ /* Distance codes 0..29 extra */
+ 16, 16, 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22,
+ 23, 23, 24, 24, 25, 25, 26, 26, 27, 27,
+ 28, 28, 29, 29, 64, 64
+];
+
+module.exports = function inflate_table(type, lens, lens_index, codes, table, table_index, work, opts)
+{
+ var bits = opts.bits;
+ //here = opts.here; /* table entry for duplication */
+
+ var len = 0; /* a code's length in bits */
+ var sym = 0; /* index of code symbols */
+ var min = 0, max = 0; /* minimum and maximum code lengths */
+ var root = 0; /* number of index bits for root table */
+ var curr = 0; /* number of index bits for current table */
+ var drop = 0; /* code bits to drop for sub-table */
+ var left = 0; /* number of prefix codes available */
+ var used = 0; /* code entries in table used */
+ var huff = 0; /* Huffman code */
+ var incr; /* for incrementing code, index */
+ var fill; /* index for replicating entries */
+ var low; /* low bits for current root entry */
+ var mask; /* mask for low root bits */
+ var next; /* next available space in table */
+ var base = null; /* base value table to use */
+ var base_index = 0;
+// var shoextra; /* extra bits table to use */
+ var end; /* use base and extra for symbol > end */
+ var count = new utils.Buf16(MAXBITS + 1); //[MAXBITS+1]; /* number of codes of each length */
+ var offs = new utils.Buf16(MAXBITS + 1); //[MAXBITS+1]; /* offsets in table for each length */
+ var extra = null;
+ var extra_index = 0;
+
+ var here_bits, here_op, here_val;
+
+ /*
+ Process a set of code lengths to create a canonical Huffman code. The
+ code lengths are lens[0..codes-1]. Each length corresponds to the
+ symbols 0..codes-1. The Huffman code is generated by first sorting the
+ symbols by length from short to long, and retaining the symbol order
+ for codes with equal lengths. Then the code starts with all zero bits
+ for the first code of the shortest length, and the codes are integer
+ increments for the same length, and zeros are appended as the length
+ increases. For the deflate format, these bits are stored backwards
+ from their more natural integer increment ordering, and so when the
+ decoding tables are built in the large loop below, the integer codes
+ are incremented backwards.
+
+ This routine assumes, but does not check, that all of the entries in
+ lens[] are in the range 0..MAXBITS. The caller must assure this.
+ 1..MAXBITS is interpreted as that code length. zero means that that
+ symbol does not occur in this code.
+
+ The codes are sorted by computing a count of codes for each length,
+ creating from that a table of starting indices for each length in the
+ sorted table, and then entering the symbols in order in the sorted
+ table. The sorted table is work[], with that space being provided by
+ the caller.
+
+ The length counts are used for other purposes as well, i.e. finding
+ the minimum and maximum length codes, determining if there are any
+ codes at all, checking for a valid set of lengths, and looking ahead
+ at length counts to determine sub-table sizes when building the
+ decoding tables.
+ */
+
+ /* accumulate lengths for codes (assumes lens[] all in 0..MAXBITS) */
+ for (len = 0; len <= MAXBITS; len++) {
+ count[len] = 0;
+ }
+ for (sym = 0; sym < codes; sym++) {
+ count[lens[lens_index + sym]]++;
+ }
+
+ /* bound code lengths, force root to be within code lengths */
+ root = bits;
+ for (max = MAXBITS; max >= 1; max--) {
+ if (count[max] !== 0) { break; }
+ }
+ if (root > max) {
+ root = max;
+ }
+ if (max === 0) { /* no symbols to code at all */
+ //table.op[opts.table_index] = 64; //here.op = (var char)64; /* invalid code marker */
+ //table.bits[opts.table_index] = 1; //here.bits = (var char)1;
+ //table.val[opts.table_index++] = 0; //here.val = (var short)0;
+ table[table_index++] = (1 << 24) | (64 << 16) | 0;
+
+
+ //table.op[opts.table_index] = 64;
+ //table.bits[opts.table_index] = 1;
+ //table.val[opts.table_index++] = 0;
+ table[table_index++] = (1 << 24) | (64 << 16) | 0;
+
+ opts.bits = 1;
+ return 0; /* no symbols, but wait for decoding to report error */
+ }
+ for (min = 1; min < max; min++) {
+ if (count[min] !== 0) { break; }
+ }
+ if (root < min) {
+ root = min;
+ }
+
+ /* check for an over-subscribed or incomplete set of lengths */
+ left = 1;
+ for (len = 1; len <= MAXBITS; len++) {
+ left <<= 1;
+ left -= count[len];
+ if (left < 0) {
+ return -1;
+ } /* over-subscribed */
+ }
+ if (left > 0 && (type === CODES || max !== 1)) {
+ return -1; /* incomplete set */
+ }
+
+ /* generate offsets into symbol table for each length for sorting */
+ offs[1] = 0;
+ for (len = 1; len < MAXBITS; len++) {
+ offs[len + 1] = offs[len] + count[len];
+ }
+
+ /* sort symbols by length, by symbol order within each length */
+ for (sym = 0; sym < codes; sym++) {
+ if (lens[lens_index + sym] !== 0) {
+ work[offs[lens[lens_index + sym]]++] = sym;
+ }
+ }
+
+ /*
+ Create and fill in decoding tables. In this loop, the table being
+ filled is at next and has curr index bits. The code being used is huff
+ with length len. That code is converted to an index by dropping drop
+ bits off of the bottom. For codes where len is less than drop + curr,
+ those top drop + curr - len bits are incremented through all values to
+ fill the table with replicated entries.
+
+ root is the number of index bits for the root table. When len exceeds
+ root, sub-tables are created pointed to by the root entry with an index
+ of the low root bits of huff. This is saved in low to check for when a
+ new sub-table should be started. drop is zero when the root table is
+ being filled, and drop is root when sub-tables are being filled.
+
+ When a new sub-table is needed, it is necessary to look ahead in the
+ code lengths to determine what size sub-table is needed. The length
+ counts are used for this, and so count[] is decremented as codes are
+ entered in the tables.
+
+ used keeps track of how many table entries have been allocated from the
+ provided *table space. It is checked for LENS and DIST tables against
+ the constants ENOUGH_LENS and ENOUGH_DISTS to guard against changes in
+ the initial root table size constants. See the comments in inftrees.h
+ for more information.
+
+ sym increments through all symbols, and the loop terminates when
+ all codes of length max, i.e. all codes, have been processed. This
+ routine permits incomplete codes, so another loop after this one fills
+ in the rest of the decoding tables with invalid code markers.
+ */
+
+ /* set up for code type */
+ // poor man optimization - use if-else instead of switch,
+ // to avoid deopts in old v8
+ if (type === CODES) {
+ base = extra = work; /* dummy value--not used */
+ end = 19;
+
+ } else if (type === LENS) {
+ base = lbase;
+ base_index -= 257;
+ extra = lext;
+ extra_index -= 257;
+ end = 256;
+
+ } else { /* DISTS */
+ base = dbase;
+ extra = dext;
+ end = -1;
+ }
+
+ /* initialize opts for loop */
+ huff = 0; /* starting code */
+ sym = 0; /* starting code symbol */
+ len = min; /* starting code length */
+ next = table_index; /* current table to fill in */
+ curr = root; /* current table index bits */
+ drop = 0; /* current bits to drop from code for index */
+ low = -1; /* trigger new sub-table when len > root */
+ used = 1 << root; /* use root table entries */
+ mask = used - 1; /* mask for comparing low */
+
+ /* check available table space */
+ if ((type === LENS && used > ENOUGH_LENS) ||
+ (type === DISTS && used > ENOUGH_DISTS)) {
+ return 1;
+ }
+
+ /* process all codes and make table entries */
+ for (;;) {
+ /* create table entry */
+ here_bits = len - drop;
+ if (work[sym] < end) {
+ here_op = 0;
+ here_val = work[sym];
+ }
+ else if (work[sym] > end) {
+ here_op = extra[extra_index + work[sym]];
+ here_val = base[base_index + work[sym]];
+ }
+ else {
+ here_op = 32 + 64; /* end of block */
+ here_val = 0;
+ }
+
+ /* replicate for those indices with low len bits equal to huff */
+ incr = 1 << (len - drop);
+ fill = 1 << curr;
+ min = fill; /* save offset to next table */
+ do {
+ fill -= incr;
+ table[next + (huff >> drop) + fill] = (here_bits << 24) | (here_op << 16) | here_val |0;
+ } while (fill !== 0);
+
+ /* backwards increment the len-bit code huff */
+ incr = 1 << (len - 1);
+ while (huff & incr) {
+ incr >>= 1;
+ }
+ if (incr !== 0) {
+ huff &= incr - 1;
+ huff += incr;
+ } else {
+ huff = 0;
+ }
+
+ /* go to next symbol, update count, len */
+ sym++;
+ if (--count[len] === 0) {
+ if (len === max) { break; }
+ len = lens[lens_index + work[sym]];
+ }
+
+ /* create new sub-table if needed */
+ if (len > root && (huff & mask) !== low) {
+ /* if first time, transition to sub-tables */
+ if (drop === 0) {
+ drop = root;
+ }
+
+ /* increment past last table */
+ next += min; /* here min is 1 << curr */
+
+ /* determine length of next table */
+ curr = len - drop;
+ left = 1 << curr;
+ while (curr + drop < max) {
+ left -= count[curr + drop];
+ if (left <= 0) { break; }
+ curr++;
+ left <<= 1;
+ }
+
+ /* check for enough space */
+ used += 1 << curr;
+ if ((type === LENS && used > ENOUGH_LENS) ||
+ (type === DISTS && used > ENOUGH_DISTS)) {
+ return 1;
+ }
+
+ /* point entry in root table to sub-table */
+ low = huff & mask;
+ /*table.op[low] = curr;
+ table.bits[low] = root;
+ table.val[low] = next - opts.table_index;*/
+ table[low] = (root << 24) | (curr << 16) | (next - table_index) |0;
+ }
+ }
+
+ /* fill in remaining table entry if code is incomplete (guaranteed to have
+ at most one remaining entry, since if the code is incomplete, the
+ maximum code length that was allowed to get this far is one bit) */
+ if (huff !== 0) {
+ //table.op[next + huff] = 64; /* invalid code marker */
+ //table.bits[next + huff] = len - drop;
+ //table.val[next + huff] = 0;
+ table[next + huff] = ((len - drop) << 24) | (64 << 16) |0;
+ }
+
+ /* set return parameters */
+ //opts.table_index += used;
+ opts.bits = root;
+ return 0;
+};
+
+},{"../utils/common":3}],13:[function(require,module,exports){
+'use strict';
+
+// (C) 1995-2013 Jean-loup Gailly and Mark Adler
+// (C) 2014-2017 Vitaly Puzrin and Andrey Tupitsin
+//
+// This software is provided 'as-is', without any express or implied
+// warranty. In no event will the authors be held liable for any damages
+// arising from the use of this software.
+//
+// Permission is granted to anyone to use this software for any purpose,
+// including commercial applications, and to alter it and redistribute it
+// freely, subject to the following restrictions:
+//
+// 1. The origin of this software must not be misrepresented; you must not
+// claim that you wrote the original software. If you use this software
+// in a product, an acknowledgment in the product documentation would be
+// appreciated but is not required.
+// 2. Altered source versions must be plainly marked as such, and must not be
+// misrepresented as being the original software.
+// 3. This notice may not be removed or altered from any source distribution.
+
+module.exports = {
+ 2: 'need dictionary', /* Z_NEED_DICT 2 */
+ 1: 'stream end', /* Z_STREAM_END 1 */
+ 0: '', /* Z_OK 0 */
+ '-1': 'file error', /* Z_ERRNO (-1) */
+ '-2': 'stream error', /* Z_STREAM_ERROR (-2) */
+ '-3': 'data error', /* Z_DATA_ERROR (-3) */
+ '-4': 'insufficient memory', /* Z_MEM_ERROR (-4) */
+ '-5': 'buffer error', /* Z_BUF_ERROR (-5) */
+ '-6': 'incompatible version' /* Z_VERSION_ERROR (-6) */
+};
+
+},{}],14:[function(require,module,exports){
+'use strict';
+
+// (C) 1995-2013 Jean-loup Gailly and Mark Adler
+// (C) 2014-2017 Vitaly Puzrin and Andrey Tupitsin
+//
+// This software is provided 'as-is', without any express or implied
+// warranty. In no event will the authors be held liable for any damages
+// arising from the use of this software.
+//
+// Permission is granted to anyone to use this software for any purpose,
+// including commercial applications, and to alter it and redistribute it
+// freely, subject to the following restrictions:
+//
+// 1. The origin of this software must not be misrepresented; you must not
+// claim that you wrote the original software. If you use this software
+// in a product, an acknowledgment in the product documentation would be
+// appreciated but is not required.
+// 2. Altered source versions must be plainly marked as such, and must not be
+// misrepresented as being the original software.
+// 3. This notice may not be removed or altered from any source distribution.
+
+/* eslint-disable space-unary-ops */
+
+var utils = require('../utils/common');
+
+/* Public constants ==========================================================*/
+/* ===========================================================================*/
+
+
+//var Z_FILTERED = 1;
+//var Z_HUFFMAN_ONLY = 2;
+//var Z_RLE = 3;
+var Z_FIXED = 4;
+//var Z_DEFAULT_STRATEGY = 0;
+
+/* Possible values of the data_type field (though see inflate()) */
+var Z_BINARY = 0;
+var Z_TEXT = 1;
+//var Z_ASCII = 1; // = Z_TEXT
+var Z_UNKNOWN = 2;
+
+/*============================================================================*/
+
+
+function zero(buf) { var len = buf.length; while (--len >= 0) { buf[len] = 0; } }
+
+// From zutil.h
+
+var STORED_BLOCK = 0;
+var STATIC_TREES = 1;
+var DYN_TREES = 2;
+/* The three kinds of block type */
+
+var MIN_MATCH = 3;
+var MAX_MATCH = 258;
+/* The minimum and maximum match lengths */
+
+// From deflate.h
+/* ===========================================================================
+ * Internal compression state.
+ */
+
+var LENGTH_CODES = 29;
+/* number of length codes, not counting the special END_BLOCK code */
+
+var LITERALS = 256;
+/* number of literal bytes 0..255 */
+
+var L_CODES = LITERALS + 1 + LENGTH_CODES;
+/* number of Literal or Length codes, including the END_BLOCK code */
+
+var D_CODES = 30;
+/* number of distance codes */
+
+var BL_CODES = 19;
+/* number of codes used to transfer the bit lengths */
+
+var HEAP_SIZE = 2 * L_CODES + 1;
+/* maximum heap size */
+
+var MAX_BITS = 15;
+/* All codes must not exceed MAX_BITS bits */
+
+var Buf_size = 16;
+/* size of bit buffer in bi_buf */
+
+
+/* ===========================================================================
+ * Constants
+ */
+
+var MAX_BL_BITS = 7;
+/* Bit length codes must not exceed MAX_BL_BITS bits */
+
+var END_BLOCK = 256;
+/* end of block literal code */
+
+var REP_3_6 = 16;
+/* repeat previous bit length 3-6 times (2 bits of repeat count) */
+
+var REPZ_3_10 = 17;
+/* repeat a zero length 3-10 times (3 bits of repeat count) */
+
+var REPZ_11_138 = 18;
+/* repeat a zero length 11-138 times (7 bits of repeat count) */
+
+/* eslint-disable comma-spacing,array-bracket-spacing */
+var extra_lbits = /* extra bits for each length code */
+ [0,0,0,0,0,0,0,0,1,1,1,1,2,2,2,2,3,3,3,3,4,4,4,4,5,5,5,5,0];
+
+var extra_dbits = /* extra bits for each distance code */
+ [0,0,0,0,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,12,12,13,13];
+
+var extra_blbits = /* extra bits for each bit length code */
+ [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,3,7];
+
+var bl_order =
+ [16,17,18,0,8,7,9,6,10,5,11,4,12,3,13,2,14,1,15];
+/* eslint-enable comma-spacing,array-bracket-spacing */
+
+/* The lengths of the bit length codes are sent in order of decreasing
+ * probability, to avoid transmitting the lengths for unused bit length codes.
+ */
+
+/* ===========================================================================
+ * Local data. These are initialized only once.
+ */
+
+// We pre-fill arrays with 0 to avoid uninitialized gaps
+
+var DIST_CODE_LEN = 512; /* see definition of array dist_code below */
+
+// !!!! Use flat array instead of structure, Freq = i*2, Len = i*2+1
+var static_ltree = new Array((L_CODES + 2) * 2);
+zero(static_ltree);
+/* The static literal tree. Since the bit lengths are imposed, there is no
+ * need for the L_CODES extra codes used during heap construction. However
+ * The codes 286 and 287 are needed to build a canonical tree (see _tr_init
+ * below).
+ */
+
+var static_dtree = new Array(D_CODES * 2);
+zero(static_dtree);
+/* The static distance tree. (Actually a trivial tree since all codes use
+ * 5 bits.)
+ */
+
+var _dist_code = new Array(DIST_CODE_LEN);
+zero(_dist_code);
+/* Distance codes. The first 256 values correspond to the distances
+ * 3 .. 258, the last 256 values correspond to the top 8 bits of
+ * the 15 bit distances.
+ */
+
+var _length_code = new Array(MAX_MATCH - MIN_MATCH + 1);
+zero(_length_code);
+/* length code for each normalized match length (0 == MIN_MATCH) */
+
+var base_length = new Array(LENGTH_CODES);
+zero(base_length);
+/* First normalized length for each code (0 = MIN_MATCH) */
+
+var base_dist = new Array(D_CODES);
+zero(base_dist);
+/* First normalized distance for each code (0 = distance of 1) */
+
+
+function StaticTreeDesc(static_tree, extra_bits, extra_base, elems, max_length) {
+
+ this.static_tree = static_tree; /* static tree or NULL */
+ this.extra_bits = extra_bits; /* extra bits for each code or NULL */
+ this.extra_base = extra_base; /* base index for extra_bits */
+ this.elems = elems; /* max number of elements in the tree */
+ this.max_length = max_length; /* max bit length for the codes */
+
+ // show if `static_tree` has data or dummy - needed for monomorphic objects
+ this.has_stree = static_tree && static_tree.length;
+}
+
+
+var static_l_desc;
+var static_d_desc;
+var static_bl_desc;
+
+
+function TreeDesc(dyn_tree, stat_desc) {
+ this.dyn_tree = dyn_tree; /* the dynamic tree */
+ this.max_code = 0; /* largest code with non zero frequency */
+ this.stat_desc = stat_desc; /* the corresponding static tree */
+}
+
+
+
+function d_code(dist) {
+ return dist < 256 ? _dist_code[dist] : _dist_code[256 + (dist >>> 7)];
+}
+
+
+/* ===========================================================================
+ * Output a short LSB first on the stream.
+ * IN assertion: there is enough room in pendingBuf.
+ */
+function put_short(s, w) {
+// put_byte(s, (uch)((w) & 0xff));
+// put_byte(s, (uch)((ush)(w) >> 8));
+ s.pending_buf[s.pending++] = (w) & 0xff;
+ s.pending_buf[s.pending++] = (w >>> 8) & 0xff;
+}
+
+
+/* ===========================================================================
+ * Send a value on a given number of bits.
+ * IN assertion: length <= 16 and value fits in length bits.
+ */
+function send_bits(s, value, length) {
+ if (s.bi_valid > (Buf_size - length)) {
+ s.bi_buf |= (value << s.bi_valid) & 0xffff;
+ put_short(s, s.bi_buf);
+ s.bi_buf = value >> (Buf_size - s.bi_valid);
+ s.bi_valid += length - Buf_size;
+ } else {
+ s.bi_buf |= (value << s.bi_valid) & 0xffff;
+ s.bi_valid += length;
+ }
+}
+
+
+function send_code(s, c, tree) {
+ send_bits(s, tree[c * 2]/*.Code*/, tree[c * 2 + 1]/*.Len*/);
+}
+
+
+/* ===========================================================================
+ * Reverse the first len bits of a code, using straightforward code (a faster
+ * method would use a table)
+ * IN assertion: 1 <= len <= 15
+ */
+function bi_reverse(code, len) {
+ var res = 0;
+ do {
+ res |= code & 1;
+ code >>>= 1;
+ res <<= 1;
+ } while (--len > 0);
+ return res >>> 1;
+}
+
+
+/* ===========================================================================
+ * Flush the bit buffer, keeping at most 7 bits in it.
+ */
+function bi_flush(s) {
+ if (s.bi_valid === 16) {
+ put_short(s, s.bi_buf);
+ s.bi_buf = 0;
+ s.bi_valid = 0;
+
+ } else if (s.bi_valid >= 8) {
+ s.pending_buf[s.pending++] = s.bi_buf & 0xff;
+ s.bi_buf >>= 8;
+ s.bi_valid -= 8;
+ }
+}
+
+
+/* ===========================================================================
+ * Compute the optimal bit lengths for a tree and update the total bit length
+ * for the current block.
+ * IN assertion: the fields freq and dad are set, heap[heap_max] and
+ * above are the tree nodes sorted by increasing frequency.
+ * OUT assertions: the field len is set to the optimal bit length, the
+ * array bl_count contains the frequencies for each bit length.
+ * The length opt_len is updated; static_len is also updated if stree is
+ * not null.
+ */
+function gen_bitlen(s, desc)
+// deflate_state *s;
+// tree_desc *desc; /* the tree descriptor */
+{
+ var tree = desc.dyn_tree;
+ var max_code = desc.max_code;
+ var stree = desc.stat_desc.static_tree;
+ var has_stree = desc.stat_desc.has_stree;
+ var extra = desc.stat_desc.extra_bits;
+ var base = desc.stat_desc.extra_base;
+ var max_length = desc.stat_desc.max_length;
+ var h; /* heap index */
+ var n, m; /* iterate over the tree elements */
+ var bits; /* bit length */
+ var xbits; /* extra bits */
+ var f; /* frequency */
+ var overflow = 0; /* number of elements with bit length too large */
+
+ for (bits = 0; bits <= MAX_BITS; bits++) {
+ s.bl_count[bits] = 0;
+ }
+
+ /* In a first pass, compute the optimal bit lengths (which may
+ * overflow in the case of the bit length tree).
+ */
+ tree[s.heap[s.heap_max] * 2 + 1]/*.Len*/ = 0; /* root of the heap */
+
+ for (h = s.heap_max + 1; h < HEAP_SIZE; h++) {
+ n = s.heap[h];
+ bits = tree[tree[n * 2 + 1]/*.Dad*/ * 2 + 1]/*.Len*/ + 1;
+ if (bits > max_length) {
+ bits = max_length;
+ overflow++;
+ }
+ tree[n * 2 + 1]/*.Len*/ = bits;
+ /* We overwrite tree[n].Dad which is no longer needed */
+
+ if (n > max_code) { continue; } /* not a leaf node */
+
+ s.bl_count[bits]++;
+ xbits = 0;
+ if (n >= base) {
+ xbits = extra[n - base];
+ }
+ f = tree[n * 2]/*.Freq*/;
+ s.opt_len += f * (bits + xbits);
+ if (has_stree) {
+ s.static_len += f * (stree[n * 2 + 1]/*.Len*/ + xbits);
+ }
+ }
+ if (overflow === 0) { return; }
+
+ // Trace((stderr,"\nbit length overflow\n"));
+ /* This happens for example on obj2 and pic of the Calgary corpus */
+
+ /* Find the first bit length which could increase: */
+ do {
+ bits = max_length - 1;
+ while (s.bl_count[bits] === 0) { bits--; }
+ s.bl_count[bits]--; /* move one leaf down the tree */
+ s.bl_count[bits + 1] += 2; /* move one overflow item as its brother */
+ s.bl_count[max_length]--;
+ /* The brother of the overflow item also moves one step up,
+ * but this does not affect bl_count[max_length]
+ */
+ overflow -= 2;
+ } while (overflow > 0);
+
+ /* Now recompute all bit lengths, scanning in increasing frequency.
+ * h is still equal to HEAP_SIZE. (It is simpler to reconstruct all
+ * lengths instead of fixing only the wrong ones. This idea is taken
+ * from 'ar' written by Haruhiko Okumura.)
+ */
+ for (bits = max_length; bits !== 0; bits--) {
+ n = s.bl_count[bits];
+ while (n !== 0) {
+ m = s.heap[--h];
+ if (m > max_code) { continue; }
+ if (tree[m * 2 + 1]/*.Len*/ !== bits) {
+ // Trace((stderr,"code %d bits %d->%d\n", m, tree[m].Len, bits));
+ s.opt_len += (bits - tree[m * 2 + 1]/*.Len*/) * tree[m * 2]/*.Freq*/;
+ tree[m * 2 + 1]/*.Len*/ = bits;
+ }
+ n--;
+ }
+ }
+}
+
+
+/* ===========================================================================
+ * Generate the codes for a given tree and bit counts (which need not be
+ * optimal).
+ * IN assertion: the array bl_count contains the bit length statistics for
+ * the given tree and the field len is set for all tree elements.
+ * OUT assertion: the field code is set for all tree elements of non
+ * zero code length.
+ */
+function gen_codes(tree, max_code, bl_count)
+// ct_data *tree; /* the tree to decorate */
+// int max_code; /* largest code with non zero frequency */
+// ushf *bl_count; /* number of codes at each bit length */
+{
+ var next_code = new Array(MAX_BITS + 1); /* next code value for each bit length */
+ var code = 0; /* running code value */
+ var bits; /* bit index */
+ var n; /* code index */
+
+ /* The distribution counts are first used to generate the code values
+ * without bit reversal.
+ */
+ for (bits = 1; bits <= MAX_BITS; bits++) {
+ next_code[bits] = code = (code + bl_count[bits - 1]) << 1;
+ }
+ /* Check that the bit counts in bl_count are consistent. The last code
+ * must be all ones.
+ */
+ //Assert (code + bl_count[MAX_BITS]-1 == (1<<MAX_BITS)-1,
+ // "inconsistent bit counts");
+ //Tracev((stderr,"\ngen_codes: max_code %d ", max_code));
+
+ for (n = 0; n <= max_code; n++) {
+ var len = tree[n * 2 + 1]/*.Len*/;
+ if (len === 0) { continue; }
+ /* Now reverse the bits */
+ tree[n * 2]/*.Code*/ = bi_reverse(next_code[len]++, len);
+
+ //Tracecv(tree != static_ltree, (stderr,"\nn %3d %c l %2d c %4x (%x) ",
+ // n, (isgraph(n) ? n : ' '), len, tree[n].Code, next_code[len]-1));
+ }
+}
+
+
+/* ===========================================================================
+ * Initialize the various 'constant' tables.
+ */
+function tr_static_init() {
+ var n; /* iterates over tree elements */
+ var bits; /* bit counter */
+ var length; /* length value */
+ var code; /* code value */
+ var dist; /* distance index */
+ var bl_count = new Array(MAX_BITS + 1);
+ /* number of codes at each bit length for an optimal tree */
+
+ // do check in _tr_init()
+ //if (static_init_done) return;
+
+ /* For some embedded targets, global variables are not initialized: */
+/*#ifdef NO_INIT_GLOBAL_POINTERS
+ static_l_desc.static_tree = static_ltree;
+ static_l_desc.extra_bits = extra_lbits;
+ static_d_desc.static_tree = static_dtree;
+ static_d_desc.extra_bits = extra_dbits;
+ static_bl_desc.extra_bits = extra_blbits;
+#endif*/
+
+ /* Initialize the mapping length (0..255) -> length code (0..28) */
+ length = 0;
+ for (code = 0; code < LENGTH_CODES - 1; code++) {
+ base_length[code] = length;
+ for (n = 0; n < (1 << extra_lbits[code]); n++) {
+ _length_code[length++] = code;
+ }
+ }
+ //Assert (length == 256, "tr_static_init: length != 256");
+ /* Note that the length 255 (match length 258) can be represented
+ * in two different ways: code 284 + 5 bits or code 285, so we
+ * overwrite length_code[255] to use the best encoding:
+ */
+ _length_code[length - 1] = code;
+
+ /* Initialize the mapping dist (0..32K) -> dist code (0..29) */
+ dist = 0;
+ for (code = 0; code < 16; code++) {
+ base_dist[code] = dist;
+ for (n = 0; n < (1 << extra_dbits[code]); n++) {
+ _dist_code[dist++] = code;
+ }
+ }
+ //Assert (dist == 256, "tr_static_init: dist != 256");
+ dist >>= 7; /* from now on, all distances are divided by 128 */
+ for (; code < D_CODES; code++) {
+ base_dist[code] = dist << 7;
+ for (n = 0; n < (1 << (extra_dbits[code] - 7)); n++) {
+ _dist_code[256 + dist++] = code;
+ }
+ }
+ //Assert (dist == 256, "tr_static_init: 256+dist != 512");
+
+ /* Construct the codes of the static literal tree */
+ for (bits = 0; bits <= MAX_BITS; bits++) {
+ bl_count[bits] = 0;
+ }
+
+ n = 0;
+ while (n <= 143) {
+ static_ltree[n * 2 + 1]/*.Len*/ = 8;
+ n++;
+ bl_count[8]++;
+ }
+ while (n <= 255) {
+ static_ltree[n * 2 + 1]/*.Len*/ = 9;
+ n++;
+ bl_count[9]++;
+ }
+ while (n <= 279) {
+ static_ltree[n * 2 + 1]/*.Len*/ = 7;
+ n++;
+ bl_count[7]++;
+ }
+ while (n <= 287) {
+ static_ltree[n * 2 + 1]/*.Len*/ = 8;
+ n++;
+ bl_count[8]++;
+ }
+ /* Codes 286 and 287 do not exist, but we must include them in the
+ * tree construction to get a canonical Huffman tree (longest code
+ * all ones)
+ */
+ gen_codes(static_ltree, L_CODES + 1, bl_count);
+
+ /* The static distance tree is trivial: */
+ for (n = 0; n < D_CODES; n++) {
+ static_dtree[n * 2 + 1]/*.Len*/ = 5;
+ static_dtree[n * 2]/*.Code*/ = bi_reverse(n, 5);
+ }
+
+ // Now data ready and we can init static trees
+ static_l_desc = new StaticTreeDesc(static_ltree, extra_lbits, LITERALS + 1, L_CODES, MAX_BITS);
+ static_d_desc = new StaticTreeDesc(static_dtree, extra_dbits, 0, D_CODES, MAX_BITS);
+ static_bl_desc = new StaticTreeDesc(new Array(0), extra_blbits, 0, BL_CODES, MAX_BL_BITS);
+
+ //static_init_done = true;
+}
+
+
+/* ===========================================================================
+ * Initialize a new block.
+ */
+function init_block(s) {
+ var n; /* iterates over tree elements */
+
+ /* Initialize the trees. */
+ for (n = 0; n < L_CODES; n++) { s.dyn_ltree[n * 2]/*.Freq*/ = 0; }
+ for (n = 0; n < D_CODES; n++) { s.dyn_dtree[n * 2]/*.Freq*/ = 0; }
+ for (n = 0; n < BL_CODES; n++) { s.bl_tree[n * 2]/*.Freq*/ = 0; }
+
+ s.dyn_ltree[END_BLOCK * 2]/*.Freq*/ = 1;
+ s.opt_len = s.static_len = 0;
+ s.last_lit = s.matches = 0;
+}
+
+
+/* ===========================================================================
+ * Flush the bit buffer and align the output on a byte boundary
+ */
+function bi_windup(s)
+{
+ if (s.bi_valid > 8) {
+ put_short(s, s.bi_buf);
+ } else if (s.bi_valid > 0) {
+ //put_byte(s, (Byte)s->bi_buf);
+ s.pending_buf[s.pending++] = s.bi_buf;
+ }
+ s.bi_buf = 0;
+ s.bi_valid = 0;
+}
+
+/* ===========================================================================
+ * Copy a stored block, storing first the length and its
+ * one's complement if requested.
+ */
+function copy_block(s, buf, len, header)
+//DeflateState *s;
+//charf *buf; /* the input data */
+//unsigned len; /* its length */
+//int header; /* true if block header must be written */
+{
+ bi_windup(s); /* align on byte boundary */
+
+ if (header) {
+ put_short(s, len);
+ put_short(s, ~len);
+ }
+// while (len--) {
+// put_byte(s, *buf++);
+// }
+ utils.arraySet(s.pending_buf, s.window, buf, len, s.pending);
+ s.pending += len;
+}
+
+/* ===========================================================================
+ * Compares to subtrees, using the tree depth as tie breaker when
+ * the subtrees have equal frequency. This minimizes the worst case length.
+ */
+function smaller(tree, n, m, depth) {
+ var _n2 = n * 2;
+ var _m2 = m * 2;
+ return (tree[_n2]/*.Freq*/ < tree[_m2]/*.Freq*/ ||
+ (tree[_n2]/*.Freq*/ === tree[_m2]/*.Freq*/ && depth[n] <= depth[m]));
+}
+
+/* ===========================================================================
+ * Restore the heap property by moving down the tree starting at node k,
+ * exchanging a node with the smallest of its two sons if necessary, stopping
+ * when the heap property is re-established (each father smaller than its
+ * two sons).
+ */
+function pqdownheap(s, tree, k)
+// deflate_state *s;
+// ct_data *tree; /* the tree to restore */
+// int k; /* node to move down */
+{
+ var v = s.heap[k];
+ var j = k << 1; /* left son of k */
+ while (j <= s.heap_len) {
+ /* Set j to the smallest of the two sons: */
+ if (j < s.heap_len &&
+ smaller(tree, s.heap[j + 1], s.heap[j], s.depth)) {
+ j++;
+ }
+ /* Exit if v is smaller than both sons */
+ if (smaller(tree, v, s.heap[j], s.depth)) { break; }
+
+ /* Exchange v with the smallest son */
+ s.heap[k] = s.heap[j];
+ k = j;
+
+ /* And continue down the tree, setting j to the left son of k */
+ j <<= 1;
+ }
+ s.heap[k] = v;
+}
+
+
+// inlined manually
+// var SMALLEST = 1;
+
+/* ===========================================================================
+ * Send the block data compressed using the given Huffman trees
+ */
+function compress_block(s, ltree, dtree)
+// deflate_state *s;
+// const ct_data *ltree; /* literal tree */
+// const ct_data *dtree; /* distance tree */
+{
+ var dist; /* distance of matched string */
+ var lc; /* match length or unmatched char (if dist == 0) */
+ var lx = 0; /* running index in l_buf */
+ var code; /* the code to send */
+ var extra; /* number of extra bits to send */
+
+ if (s.last_lit !== 0) {
+ do {
+ dist = (s.pending_buf[s.d_buf + lx * 2] << 8) | (s.pending_buf[s.d_buf + lx * 2 + 1]);
+ lc = s.pending_buf[s.l_buf + lx];
+ lx++;
+
+ if (dist === 0) {
+ send_code(s, lc, ltree); /* send a literal byte */
+ //Tracecv(isgraph(lc), (stderr," '%c' ", lc));
+ } else {
+ /* Here, lc is the match length - MIN_MATCH */
+ code = _length_code[lc];
+ send_code(s, code + LITERALS + 1, ltree); /* send the length code */
+ extra = extra_lbits[code];
+ if (extra !== 0) {
+ lc -= base_length[code];
+ send_bits(s, lc, extra); /* send the extra length bits */
+ }
+ dist--; /* dist is now the match distance - 1 */
+ code = d_code(dist);
+ //Assert (code < D_CODES, "bad d_code");
+
+ send_code(s, code, dtree); /* send the distance code */
+ extra = extra_dbits[code];
+ if (extra !== 0) {
+ dist -= base_dist[code];
+ send_bits(s, dist, extra); /* send the extra distance bits */
+ }
+ } /* literal or match pair ? */
+
+ /* Check that the overlay between pending_buf and d_buf+l_buf is ok: */
+ //Assert((uInt)(s->pending) < s->lit_bufsize + 2*lx,
+ // "pendingBuf overflow");
+
+ } while (lx < s.last_lit);
+ }
+
+ send_code(s, END_BLOCK, ltree);
+}
+
+
+/* ===========================================================================
+ * Construct one Huffman tree and assigns the code bit strings and lengths.
+ * Update the total bit length for the current block.
+ * IN assertion: the field freq is set for all tree elements.
+ * OUT assertions: the fields len and code are set to the optimal bit length
+ * and corresponding code. The length opt_len is updated; static_len is
+ * also updated if stree is not null. The field max_code is set.
+ */
+function build_tree(s, desc)
+// deflate_state *s;
+// tree_desc *desc; /* the tree descriptor */
+{
+ var tree = desc.dyn_tree;
+ var stree = desc.stat_desc.static_tree;
+ var has_stree = desc.stat_desc.has_stree;
+ var elems = desc.stat_desc.elems;
+ var n, m; /* iterate over heap elements */
+ var max_code = -1; /* largest code with non zero frequency */
+ var node; /* new node being created */
+
+ /* Construct the initial heap, with least frequent element in
+ * heap[SMALLEST]. The sons of heap[n] are heap[2*n] and heap[2*n+1].
+ * heap[0] is not used.
+ */
+ s.heap_len = 0;
+ s.heap_max = HEAP_SIZE;
+
+ for (n = 0; n < elems; n++) {
+ if (tree[n * 2]/*.Freq*/ !== 0) {
+ s.heap[++s.heap_len] = max_code = n;
+ s.depth[n] = 0;
+
+ } else {
+ tree[n * 2 + 1]/*.Len*/ = 0;
+ }
+ }
+
+ /* The pkzip format requires that at least one distance code exists,
+ * and that at least one bit should be sent even if there is only one
+ * possible code. So to avoid special checks later on we force at least
+ * two codes of non zero frequency.
+ */
+ while (s.heap_len < 2) {
+ node = s.heap[++s.heap_len] = (max_code < 2 ? ++max_code : 0);
+ tree[node * 2]/*.Freq*/ = 1;
+ s.depth[node] = 0;
+ s.opt_len--;
+
+ if (has_stree) {
+ s.static_len -= stree[node * 2 + 1]/*.Len*/;
+ }
+ /* node is 0 or 1 so it does not have extra bits */
+ }
+ desc.max_code = max_code;
+
+ /* The elements heap[heap_len/2+1 .. heap_len] are leaves of the tree,
+ * establish sub-heaps of increasing lengths:
+ */
+ for (n = (s.heap_len >> 1/*int /2*/); n >= 1; n--) { pqdownheap(s, tree, n); }
+
+ /* Construct the Huffman tree by repeatedly combining the least two
+ * frequent nodes.
+ */
+ node = elems; /* next internal node of the tree */
+ do {
+ //pqremove(s, tree, n); /* n = node of least frequency */
+ /*** pqremove ***/
+ n = s.heap[1/*SMALLEST*/];
+ s.heap[1/*SMALLEST*/] = s.heap[s.heap_len--];
+ pqdownheap(s, tree, 1/*SMALLEST*/);
+ /***/
+
+ m = s.heap[1/*SMALLEST*/]; /* m = node of next least frequency */
+
+ s.heap[--s.heap_max] = n; /* keep the nodes sorted by frequency */
+ s.heap[--s.heap_max] = m;
+
+ /* Create a new node father of n and m */
+ tree[node * 2]/*.Freq*/ = tree[n * 2]/*.Freq*/ + tree[m * 2]/*.Freq*/;
+ s.depth[node] = (s.depth[n] >= s.depth[m] ? s.depth[n] : s.depth[m]) + 1;
+ tree[n * 2 + 1]/*.Dad*/ = tree[m * 2 + 1]/*.Dad*/ = node;
+
+ /* and insert the new node in the heap */
+ s.heap[1/*SMALLEST*/] = node++;
+ pqdownheap(s, tree, 1/*SMALLEST*/);
+
+ } while (s.heap_len >= 2);
+
+ s.heap[--s.heap_max] = s.heap[1/*SMALLEST*/];
+
+ /* At this point, the fields freq and dad are set. We can now
+ * generate the bit lengths.
+ */
+ gen_bitlen(s, desc);
+
+ /* The field len is now set, we can generate the bit codes */
+ gen_codes(tree, max_code, s.bl_count);
+}
+
+
+/* ===========================================================================
+ * Scan a literal or distance tree to determine the frequencies of the codes
+ * in the bit length tree.
+ */
+function scan_tree(s, tree, max_code)
+// deflate_state *s;
+// ct_data *tree; /* the tree to be scanned */
+// int max_code; /* and its largest code of non zero frequency */
+{
+ var n; /* iterates over all tree elements */
+ var prevlen = -1; /* last emitted length */
+ var curlen; /* length of current code */
+
+ var nextlen = tree[0 * 2 + 1]/*.Len*/; /* length of next code */
+
+ var count = 0; /* repeat count of the current code */
+ var max_count = 7; /* max repeat count */
+ var min_count = 4; /* min repeat count */
+
+ if (nextlen === 0) {
+ max_count = 138;
+ min_count = 3;
+ }
+ tree[(max_code + 1) * 2 + 1]/*.Len*/ = 0xffff; /* guard */
+
+ for (n = 0; n <= max_code; n++) {
+ curlen = nextlen;
+ nextlen = tree[(n + 1) * 2 + 1]/*.Len*/;
+
+ if (++count < max_count && curlen === nextlen) {
+ continue;
+
+ } else if (count < min_count) {
+ s.bl_tree[curlen * 2]/*.Freq*/ += count;
+
+ } else if (curlen !== 0) {
+
+ if (curlen !== prevlen) { s.bl_tree[curlen * 2]/*.Freq*/++; }
+ s.bl_tree[REP_3_6 * 2]/*.Freq*/++;
+
+ } else if (count <= 10) {
+ s.bl_tree[REPZ_3_10 * 2]/*.Freq*/++;
+
+ } else {
+ s.bl_tree[REPZ_11_138 * 2]/*.Freq*/++;
+ }
+
+ count = 0;
+ prevlen = curlen;
+
+ if (nextlen === 0) {
+ max_count = 138;
+ min_count = 3;
+
+ } else if (curlen === nextlen) {
+ max_count = 6;
+ min_count = 3;
+
+ } else {
+ max_count = 7;
+ min_count = 4;
+ }
+ }
+}
+
+
+/* ===========================================================================
+ * Send a literal or distance tree in compressed form, using the codes in
+ * bl_tree.
+ */
+function send_tree(s, tree, max_code)
+// deflate_state *s;
+// ct_data *tree; /* the tree to be scanned */
+// int max_code; /* and its largest code of non zero frequency */
+{
+ var n; /* iterates over all tree elements */
+ var prevlen = -1; /* last emitted length */
+ var curlen; /* length of current code */
+
+ var nextlen = tree[0 * 2 + 1]/*.Len*/; /* length of next code */
+
+ var count = 0; /* repeat count of the current code */
+ var max_count = 7; /* max repeat count */
+ var min_count = 4; /* min repeat count */
+
+ /* tree[max_code+1].Len = -1; */ /* guard already set */
+ if (nextlen === 0) {
+ max_count = 138;
+ min_count = 3;
+ }
+
+ for (n = 0; n <= max_code; n++) {
+ curlen = nextlen;
+ nextlen = tree[(n + 1) * 2 + 1]/*.Len*/;
+
+ if (++count < max_count && curlen === nextlen) {
+ continue;
+
+ } else if (count < min_count) {
+ do { send_code(s, curlen, s.bl_tree); } while (--count !== 0);
+
+ } else if (curlen !== 0) {
+ if (curlen !== prevlen) {
+ send_code(s, curlen, s.bl_tree);
+ count--;
+ }
+ //Assert(count >= 3 && count <= 6, " 3_6?");
+ send_code(s, REP_3_6, s.bl_tree);
+ send_bits(s, count - 3, 2);
+
+ } else if (count <= 10) {
+ send_code(s, REPZ_3_10, s.bl_tree);
+ send_bits(s, count - 3, 3);
+
+ } else {
+ send_code(s, REPZ_11_138, s.bl_tree);
+ send_bits(s, count - 11, 7);
+ }
+
+ count = 0;
+ prevlen = curlen;
+ if (nextlen === 0) {
+ max_count = 138;
+ min_count = 3;
+
+ } else if (curlen === nextlen) {
+ max_count = 6;
+ min_count = 3;
+
+ } else {
+ max_count = 7;
+ min_count = 4;
+ }
+ }
+}
+
+
+/* ===========================================================================
+ * Construct the Huffman tree for the bit lengths and return the index in
+ * bl_order of the last bit length code to send.
+ */
+function build_bl_tree(s) {
+ var max_blindex; /* index of last bit length code of non zero freq */
+
+ /* Determine the bit length frequencies for literal and distance trees */
+ scan_tree(s, s.dyn_ltree, s.l_desc.max_code);
+ scan_tree(s, s.dyn_dtree, s.d_desc.max_code);
+
+ /* Build the bit length tree: */
+ build_tree(s, s.bl_desc);
+ /* opt_len now includes the length of the tree representations, except
+ * the lengths of the bit lengths codes and the 5+5+4 bits for the counts.
+ */
+
+ /* Determine the number of bit length codes to send. The pkzip format
+ * requires that at least 4 bit length codes be sent. (appnote.txt says
+ * 3 but the actual value used is 4.)
+ */
+ for (max_blindex = BL_CODES - 1; max_blindex >= 3; max_blindex--) {
+ if (s.bl_tree[bl_order[max_blindex] * 2 + 1]/*.Len*/ !== 0) {
+ break;
+ }
+ }
+ /* Update opt_len to include the bit length tree and counts */
+ s.opt_len += 3 * (max_blindex + 1) + 5 + 5 + 4;
+ //Tracev((stderr, "\ndyn trees: dyn %ld, stat %ld",
+ // s->opt_len, s->static_len));
+
+ return max_blindex;
+}
+
+
+/* ===========================================================================
+ * Send the header for a block using dynamic Huffman trees: the counts, the
+ * lengths of the bit length codes, the literal tree and the distance tree.
+ * IN assertion: lcodes >= 257, dcodes >= 1, blcodes >= 4.
+ */
+function send_all_trees(s, lcodes, dcodes, blcodes)
+// deflate_state *s;
+// int lcodes, dcodes, blcodes; /* number of codes for each tree */
+{
+ var rank; /* index in bl_order */
+
+ //Assert (lcodes >= 257 && dcodes >= 1 && blcodes >= 4, "not enough codes");
+ //Assert (lcodes <= L_CODES && dcodes <= D_CODES && blcodes <= BL_CODES,
+ // "too many codes");
+ //Tracev((stderr, "\nbl counts: "));
+ send_bits(s, lcodes - 257, 5); /* not +255 as stated in appnote.txt */
+ send_bits(s, dcodes - 1, 5);
+ send_bits(s, blcodes - 4, 4); /* not -3 as stated in appnote.txt */
+ for (rank = 0; rank < blcodes; rank++) {
+ //Tracev((stderr, "\nbl code %2d ", bl_order[rank]));
+ send_bits(s, s.bl_tree[bl_order[rank] * 2 + 1]/*.Len*/, 3);
+ }
+ //Tracev((stderr, "\nbl tree: sent %ld", s->bits_sent));
+
+ send_tree(s, s.dyn_ltree, lcodes - 1); /* literal tree */
+ //Tracev((stderr, "\nlit tree: sent %ld", s->bits_sent));
+
+ send_tree(s, s.dyn_dtree, dcodes - 1); /* distance tree */
+ //Tracev((stderr, "\ndist tree: sent %ld", s->bits_sent));
+}
+
+
+/* ===========================================================================
+ * Check if the data type is TEXT or BINARY, using the following algorithm:
+ * - TEXT if the two conditions below are satisfied:
+ * a) There are no non-portable control characters belonging to the
+ * "black list" (0..6, 14..25, 28..31).
+ * b) There is at least one printable character belonging to the
+ * "white list" (9 {TAB}, 10 {LF}, 13 {CR}, 32..255).
+ * - BINARY otherwise.
+ * - The following partially-portable control characters form a
+ * "gray list" that is ignored in this detection algorithm:
+ * (7 {BEL}, 8 {BS}, 11 {VT}, 12 {FF}, 26 {SUB}, 27 {ESC}).
+ * IN assertion: the fields Freq of dyn_ltree are set.
+ */
+function detect_data_type(s) {
+ /* black_mask is the bit mask of black-listed bytes
+ * set bits 0..6, 14..25, and 28..31
+ * 0xf3ffc07f = binary 11110011111111111100000001111111
+ */
+ var black_mask = 0xf3ffc07f;
+ var n;
+
+ /* Check for non-textual ("black-listed") bytes. */
+ for (n = 0; n <= 31; n++, black_mask >>>= 1) {
+ if ((black_mask & 1) && (s.dyn_ltree[n * 2]/*.Freq*/ !== 0)) {
+ return Z_BINARY;
+ }
+ }
+
+ /* Check for textual ("white-listed") bytes. */
+ if (s.dyn_ltree[9 * 2]/*.Freq*/ !== 0 || s.dyn_ltree[10 * 2]/*.Freq*/ !== 0 ||
+ s.dyn_ltree[13 * 2]/*.Freq*/ !== 0) {
+ return Z_TEXT;
+ }
+ for (n = 32; n < LITERALS; n++) {
+ if (s.dyn_ltree[n * 2]/*.Freq*/ !== 0) {
+ return Z_TEXT;
+ }
+ }
+
+ /* There are no "black-listed" or "white-listed" bytes:
+ * this stream either is empty or has tolerated ("gray-listed") bytes only.
+ */
+ return Z_BINARY;
+}
+
+
+var static_init_done = false;
+
+/* ===========================================================================
+ * Initialize the tree data structures for a new zlib stream.
+ */
+function _tr_init(s)
+{
+
+ if (!static_init_done) {
+ tr_static_init();
+ static_init_done = true;
+ }
+
+ s.l_desc = new TreeDesc(s.dyn_ltree, static_l_desc);
+ s.d_desc = new TreeDesc(s.dyn_dtree, static_d_desc);
+ s.bl_desc = new TreeDesc(s.bl_tree, static_bl_desc);
+
+ s.bi_buf = 0;
+ s.bi_valid = 0;
+
+ /* Initialize the first block of the first file: */
+ init_block(s);
+}
+
+
+/* ===========================================================================
+ * Send a stored block
+ */
+function _tr_stored_block(s, buf, stored_len, last)
+//DeflateState *s;
+//charf *buf; /* input block */
+//ulg stored_len; /* length of input block */
+//int last; /* one if this is the last block for a file */
+{
+ send_bits(s, (STORED_BLOCK << 1) + (last ? 1 : 0), 3); /* send block type */
+ copy_block(s, buf, stored_len, true); /* with header */
+}
+
+
+/* ===========================================================================
+ * Send one empty static block to give enough lookahead for inflate.
+ * This takes 10 bits, of which 7 may remain in the bit buffer.
+ */
+function _tr_align(s) {
+ send_bits(s, STATIC_TREES << 1, 3);
+ send_code(s, END_BLOCK, static_ltree);
+ bi_flush(s);
+}
+
+
+/* ===========================================================================
+ * Determine the best encoding for the current block: dynamic trees, static
+ * trees or store, and output the encoded block to the zip file.
+ */
+function _tr_flush_block(s, buf, stored_len, last)
+//DeflateState *s;
+//charf *buf; /* input block, or NULL if too old */
+//ulg stored_len; /* length of input block */
+//int last; /* one if this is the last block for a file */
+{
+ var opt_lenb, static_lenb; /* opt_len and static_len in bytes */
+ var max_blindex = 0; /* index of last bit length code of non zero freq */
+
+ /* Build the Huffman trees unless a stored block is forced */
+ if (s.level > 0) {
+
+ /* Check if the file is binary or text */
+ if (s.strm.data_type === Z_UNKNOWN) {
+ s.strm.data_type = detect_data_type(s);
+ }
+
+ /* Construct the literal and distance trees */
+ build_tree(s, s.l_desc);
+ // Tracev((stderr, "\nlit data: dyn %ld, stat %ld", s->opt_len,
+ // s->static_len));
+
+ build_tree(s, s.d_desc);
+ // Tracev((stderr, "\ndist data: dyn %ld, stat %ld", s->opt_len,
+ // s->static_len));
+ /* At this point, opt_len and static_len are the total bit lengths of
+ * the compressed block data, excluding the tree representations.
+ */
+
+ /* Build the bit length tree for the above two trees, and get the index
+ * in bl_order of the last bit length code to send.
+ */
+ max_blindex = build_bl_tree(s);
+
+ /* Determine the best encoding. Compute the block lengths in bytes. */
+ opt_lenb = (s.opt_len + 3 + 7) >>> 3;
+ static_lenb = (s.static_len + 3 + 7) >>> 3;
+
+ // Tracev((stderr, "\nopt %lu(%lu) stat %lu(%lu) stored %lu lit %u ",
+ // opt_lenb, s->opt_len, static_lenb, s->static_len, stored_len,
+ // s->last_lit));
+
+ if (static_lenb <= opt_lenb) { opt_lenb = static_lenb; }
+
+ } else {
+ // Assert(buf != (char*)0, "lost buf");
+ opt_lenb = static_lenb = stored_len + 5; /* force a stored block */
+ }
+
+ if ((stored_len + 4 <= opt_lenb) && (buf !== -1)) {
+ /* 4: two words for the lengths */
+
+ /* The test buf != NULL is only necessary if LIT_BUFSIZE > WSIZE.
+ * Otherwise we can't have processed more than WSIZE input bytes since
+ * the last block flush, because compression would have been
+ * successful. If LIT_BUFSIZE <= WSIZE, it is never too late to
+ * transform a block into a stored block.
+ */
+ _tr_stored_block(s, buf, stored_len, last);
+
+ } else if (s.strategy === Z_FIXED || static_lenb === opt_lenb) {
+
+ send_bits(s, (STATIC_TREES << 1) + (last ? 1 : 0), 3);
+ compress_block(s, static_ltree, static_dtree);
+
+ } else {
+ send_bits(s, (DYN_TREES << 1) + (last ? 1 : 0), 3);
+ send_all_trees(s, s.l_desc.max_code + 1, s.d_desc.max_code + 1, max_blindex + 1);
+ compress_block(s, s.dyn_ltree, s.dyn_dtree);
+ }
+ // Assert (s->compressed_len == s->bits_sent, "bad compressed size");
+ /* The above check is made mod 2^32, for files larger than 512 MB
+ * and uLong implemented on 32 bits.
+ */
+ init_block(s);
+
+ if (last) {
+ bi_windup(s);
+ }
+ // Tracev((stderr,"\ncomprlen %lu(%lu) ", s->compressed_len>>3,
+ // s->compressed_len-7*last));
+}
+
+/* ===========================================================================
+ * Save the match info and tally the frequency counts. Return true if
+ * the current block must be flushed.
+ */
+function _tr_tally(s, dist, lc)
+// deflate_state *s;
+// unsigned dist; /* distance of matched string */
+// unsigned lc; /* match length-MIN_MATCH or unmatched char (if dist==0) */
+{
+ //var out_length, in_length, dcode;
+
+ s.pending_buf[s.d_buf + s.last_lit * 2] = (dist >>> 8) & 0xff;
+ s.pending_buf[s.d_buf + s.last_lit * 2 + 1] = dist & 0xff;
+
+ s.pending_buf[s.l_buf + s.last_lit] = lc & 0xff;
+ s.last_lit++;
+
+ if (dist === 0) {
+ /* lc is the unmatched char */
+ s.dyn_ltree[lc * 2]/*.Freq*/++;
+ } else {
+ s.matches++;
+ /* Here, lc is the match length - MIN_MATCH */
+ dist--; /* dist = match distance - 1 */
+ //Assert((ush)dist < (ush)MAX_DIST(s) &&
+ // (ush)lc <= (ush)(MAX_MATCH-MIN_MATCH) &&
+ // (ush)d_code(dist) < (ush)D_CODES, "_tr_tally: bad match");
+
+ s.dyn_ltree[(_length_code[lc] + LITERALS + 1) * 2]/*.Freq*/++;
+ s.dyn_dtree[d_code(dist) * 2]/*.Freq*/++;
+ }
+
+// (!) This block is disabled in zlib defaults,
+// don't enable it for binary compatibility
+
+//#ifdef TRUNCATE_BLOCK
+// /* Try to guess if it is profitable to stop the current block here */
+// if ((s.last_lit & 0x1fff) === 0 && s.level > 2) {
+// /* Compute an upper bound for the compressed length */
+// out_length = s.last_lit*8;
+// in_length = s.strstart - s.block_start;
+//
+// for (dcode = 0; dcode < D_CODES; dcode++) {
+// out_length += s.dyn_dtree[dcode*2]/*.Freq*/ * (5 + extra_dbits[dcode]);
+// }
+// out_length >>>= 3;
+// //Tracev((stderr,"\nlast_lit %u, in %ld, out ~%ld(%ld%%) ",
+// // s->last_lit, in_length, out_length,
+// // 100L - out_length*100L/in_length));
+// if (s.matches < (s.last_lit>>1)/*int /2*/ && out_length < (in_length>>1)/*int /2*/) {
+// return true;
+// }
+// }
+//#endif
+
+ return (s.last_lit === s.lit_bufsize - 1);
+ /* We avoid equality with lit_bufsize because of wraparound at 64K
+ * on 16 bit machines and because stored blocks are restricted to
+ * 64K-1 bytes.
+ */
+}
+
+exports._tr_init = _tr_init;
+exports._tr_stored_block = _tr_stored_block;
+exports._tr_flush_block = _tr_flush_block;
+exports._tr_tally = _tr_tally;
+exports._tr_align = _tr_align;
+
+},{"../utils/common":3}],15:[function(require,module,exports){
+'use strict';
+
+// (C) 1995-2013 Jean-loup Gailly and Mark Adler
+// (C) 2014-2017 Vitaly Puzrin and Andrey Tupitsin
+//
+// This software is provided 'as-is', without any express or implied
+// warranty. In no event will the authors be held liable for any damages
+// arising from the use of this software.
+//
+// Permission is granted to anyone to use this software for any purpose,
+// including commercial applications, and to alter it and redistribute it
+// freely, subject to the following restrictions:
+//
+// 1. The origin of this software must not be misrepresented; you must not
+// claim that you wrote the original software. If you use this software
+// in a product, an acknowledgment in the product documentation would be
+// appreciated but is not required.
+// 2. Altered source versions must be plainly marked as such, and must not be
+// misrepresented as being the original software.
+// 3. This notice may not be removed or altered from any source distribution.
+
+function ZStream() {
+ /* next input byte */
+ this.input = null; // JS specific, because we have no pointers
+ this.next_in = 0;
+ /* number of bytes available at input */
+ this.avail_in = 0;
+ /* total number of input bytes read so far */
+ this.total_in = 0;
+ /* next output byte should be put there */
+ this.output = null; // JS specific, because we have no pointers
+ this.next_out = 0;
+ /* remaining free space at output */
+ this.avail_out = 0;
+ /* total number of bytes output so far */
+ this.total_out = 0;
+ /* last error message, NULL if no error */
+ this.msg = ''/*Z_NULL*/;
+ /* not visible by applications */
+ this.state = null;
+ /* best guess about the data type: binary or text */
+ this.data_type = 2/*Z_UNKNOWN*/;
+ /* adler32 value of the uncompressed data */
+ this.adler = 0;
+}
+
+module.exports = ZStream;
+
+},{}],"/":[function(require,module,exports){
+// Top level file is just a mixin of submodules & constants
+'use strict';
+
+var assign = require('./lib/utils/common').assign;
+
+var deflate = require('./lib/deflate');
+var inflate = require('./lib/inflate');
+var constants = require('./lib/zlib/constants');
+
+var pako = {};
+
+assign(pako, deflate, inflate, constants);
+
+module.exports = pako;
+
+},{"./lib/deflate":1,"./lib/inflate":2,"./lib/utils/common":3,"./lib/zlib/constants":6}]},{},[])("/")
+});
diff --git a/app/templates/base.html.j2 b/app/templates/base.html.j2
index a6d4c559..0d9ac023 100644
--- a/app/templates/base.html.j2
+++ b/app/templates/base.html.j2
@@ -19,6 +19,7 @@
<script src="{{ url_for('static', filename='js/CorpusList.js') }}"></script>
<script src="{{ url_for('static', filename='js/JobList.js') }}"></script>
<script src="{{ url_for('static', filename='js/darkreader.js') }}"></script>
+ <script src="{{ url_for('static', filename='js/pako.js') }}"></script>
<script>
{% if current_user.is_dark == True %}
DarkReader.enable({
--
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