Updated 40 files, added 37 files, deleted 1103 files and renamed 3905 files (automated)

1 files changed, 0 insertions, 3997 deletions

diff --git a/school/node_modules/pako/dist/pako_deflate.js b/school/node_modules/pako/dist/pako_deflate.js
deleted file mode 100644
index d6bbaa1..0000000
--- a/school/node_modules/pako/dist/pako_deflate.js
+++ /dev/null
@@ -1,3997 +0,0 @@
-/* pako 1.0.11 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 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);
-
-},{}],2:[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":1}],3:[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;
-
-},{}],4:[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;
-
-},{}],5:[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":1,"./adler32":3,"./crc32":4,"./messages":6,"./trees":7}],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 = {
-  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) */
-};
-
-},{}],7:[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":1}],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.
-
-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;
-
-},{}],"/lib/deflate.js":[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":1,"./utils/strings":2,"./zlib/deflate":5,"./zlib/messages":6,"./zlib/zstream":8}]},{},[])("/lib/deflate.js")
-});