[6a3a178] | 1 | /* 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){
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| 2 | 'use strict';
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| 3 |
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| 4 |
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| 5 | var TYPED_OK = (typeof Uint8Array !== 'undefined') &&
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| 6 | (typeof Uint16Array !== 'undefined') &&
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| 7 | (typeof Int32Array !== 'undefined');
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| 8 |
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| 9 | function _has(obj, key) {
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| 10 | return Object.prototype.hasOwnProperty.call(obj, key);
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| 11 | }
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| 12 |
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| 13 | exports.assign = function (obj /*from1, from2, from3, ...*/) {
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| 14 | var sources = Array.prototype.slice.call(arguments, 1);
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| 15 | while (sources.length) {
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| 16 | var source = sources.shift();
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| 17 | if (!source) { continue; }
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| 18 |
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| 19 | if (typeof source !== 'object') {
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| 20 | throw new TypeError(source + 'must be non-object');
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| 21 | }
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| 22 |
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| 23 | for (var p in source) {
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| 24 | if (_has(source, p)) {
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| 25 | obj[p] = source[p];
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| 26 | }
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| 27 | }
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| 28 | }
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| 29 |
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| 30 | return obj;
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| 31 | };
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| 32 |
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| 33 |
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| 34 | // reduce buffer size, avoiding mem copy
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| 35 | exports.shrinkBuf = function (buf, size) {
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| 36 | if (buf.length === size) { return buf; }
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| 37 | if (buf.subarray) { return buf.subarray(0, size); }
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| 38 | buf.length = size;
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| 39 | return buf;
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| 40 | };
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| 41 |
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| 42 |
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| 43 | var fnTyped = {
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| 44 | arraySet: function (dest, src, src_offs, len, dest_offs) {
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| 45 | if (src.subarray && dest.subarray) {
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| 46 | dest.set(src.subarray(src_offs, src_offs + len), dest_offs);
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| 47 | return;
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| 48 | }
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| 49 | // Fallback to ordinary array
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| 50 | for (var i = 0; i < len; i++) {
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| 51 | dest[dest_offs + i] = src[src_offs + i];
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| 52 | }
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| 53 | },
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| 54 | // Join array of chunks to single array.
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| 55 | flattenChunks: function (chunks) {
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| 56 | var i, l, len, pos, chunk, result;
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| 57 |
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| 58 | // calculate data length
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| 59 | len = 0;
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| 60 | for (i = 0, l = chunks.length; i < l; i++) {
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| 61 | len += chunks[i].length;
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| 62 | }
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| 63 |
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| 64 | // join chunks
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| 65 | result = new Uint8Array(len);
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| 66 | pos = 0;
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| 67 | for (i = 0, l = chunks.length; i < l; i++) {
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| 68 | chunk = chunks[i];
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| 69 | result.set(chunk, pos);
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| 70 | pos += chunk.length;
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| 71 | }
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| 72 |
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| 73 | return result;
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| 74 | }
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| 75 | };
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| 76 |
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| 77 | var fnUntyped = {
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| 78 | arraySet: function (dest, src, src_offs, len, dest_offs) {
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| 79 | for (var i = 0; i < len; i++) {
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| 80 | dest[dest_offs + i] = src[src_offs + i];
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| 81 | }
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| 82 | },
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| 83 | // Join array of chunks to single array.
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| 84 | flattenChunks: function (chunks) {
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| 85 | return [].concat.apply([], chunks);
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| 86 | }
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| 87 | };
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| 88 |
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| 89 |
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| 90 | // Enable/Disable typed arrays use, for testing
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| 91 | //
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| 92 | exports.setTyped = function (on) {
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| 93 | if (on) {
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| 94 | exports.Buf8 = Uint8Array;
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| 95 | exports.Buf16 = Uint16Array;
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| 96 | exports.Buf32 = Int32Array;
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| 97 | exports.assign(exports, fnTyped);
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| 98 | } else {
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| 99 | exports.Buf8 = Array;
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| 100 | exports.Buf16 = Array;
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| 101 | exports.Buf32 = Array;
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| 102 | exports.assign(exports, fnUntyped);
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| 103 | }
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| 104 | };
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| 105 |
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| 106 | exports.setTyped(TYPED_OK);
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| 107 |
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| 108 | },{}],2:[function(require,module,exports){
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| 109 | // String encode/decode helpers
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| 110 | 'use strict';
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| 111 |
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| 112 |
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| 113 | var utils = require('./common');
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| 114 |
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| 115 |
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| 116 | // Quick check if we can use fast array to bin string conversion
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| 117 | //
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| 118 | // - apply(Array) can fail on Android 2.2
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| 119 | // - apply(Uint8Array) can fail on iOS 5.1 Safari
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| 120 | //
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| 121 | var STR_APPLY_OK = true;
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| 122 | var STR_APPLY_UIA_OK = true;
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| 123 |
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| 124 | try { String.fromCharCode.apply(null, [ 0 ]); } catch (__) { STR_APPLY_OK = false; }
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| 125 | try { String.fromCharCode.apply(null, new Uint8Array(1)); } catch (__) { STR_APPLY_UIA_OK = false; }
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| 126 |
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| 127 |
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| 128 | // Table with utf8 lengths (calculated by first byte of sequence)
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| 129 | // Note, that 5 & 6-byte values and some 4-byte values can not be represented in JS,
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| 130 | // because max possible codepoint is 0x10ffff
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| 131 | var _utf8len = new utils.Buf8(256);
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| 132 | for (var q = 0; q < 256; q++) {
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| 133 | _utf8len[q] = (q >= 252 ? 6 : q >= 248 ? 5 : q >= 240 ? 4 : q >= 224 ? 3 : q >= 192 ? 2 : 1);
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| 134 | }
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| 135 | _utf8len[254] = _utf8len[254] = 1; // Invalid sequence start
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| 136 |
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| 137 |
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| 138 | // convert string to array (typed, when possible)
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| 139 | exports.string2buf = function (str) {
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| 140 | var buf, c, c2, m_pos, i, str_len = str.length, buf_len = 0;
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| 141 |
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| 142 | // count binary size
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| 143 | for (m_pos = 0; m_pos < str_len; m_pos++) {
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| 144 | c = str.charCodeAt(m_pos);
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| 145 | if ((c & 0xfc00) === 0xd800 && (m_pos + 1 < str_len)) {
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| 146 | c2 = str.charCodeAt(m_pos + 1);
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| 147 | if ((c2 & 0xfc00) === 0xdc00) {
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| 148 | c = 0x10000 + ((c - 0xd800) << 10) + (c2 - 0xdc00);
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| 149 | m_pos++;
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| 150 | }
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| 151 | }
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| 152 | buf_len += c < 0x80 ? 1 : c < 0x800 ? 2 : c < 0x10000 ? 3 : 4;
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| 153 | }
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| 154 |
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| 155 | // allocate buffer
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| 156 | buf = new utils.Buf8(buf_len);
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| 157 |
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| 158 | // convert
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| 159 | for (i = 0, m_pos = 0; i < buf_len; m_pos++) {
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| 160 | c = str.charCodeAt(m_pos);
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| 161 | if ((c & 0xfc00) === 0xd800 && (m_pos + 1 < str_len)) {
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| 162 | c2 = str.charCodeAt(m_pos + 1);
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| 163 | if ((c2 & 0xfc00) === 0xdc00) {
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| 164 | c = 0x10000 + ((c - 0xd800) << 10) + (c2 - 0xdc00);
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| 165 | m_pos++;
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| 166 | }
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| 167 | }
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| 168 | if (c < 0x80) {
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| 169 | /* one byte */
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| 170 | buf[i++] = c;
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| 171 | } else if (c < 0x800) {
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| 172 | /* two bytes */
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| 173 | buf[i++] = 0xC0 | (c >>> 6);
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| 174 | buf[i++] = 0x80 | (c & 0x3f);
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| 175 | } else if (c < 0x10000) {
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| 176 | /* three bytes */
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| 177 | buf[i++] = 0xE0 | (c >>> 12);
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| 178 | buf[i++] = 0x80 | (c >>> 6 & 0x3f);
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| 179 | buf[i++] = 0x80 | (c & 0x3f);
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| 180 | } else {
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| 181 | /* four bytes */
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| 182 | buf[i++] = 0xf0 | (c >>> 18);
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| 183 | buf[i++] = 0x80 | (c >>> 12 & 0x3f);
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| 184 | buf[i++] = 0x80 | (c >>> 6 & 0x3f);
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| 185 | buf[i++] = 0x80 | (c & 0x3f);
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| 186 | }
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| 187 | }
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| 188 |
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| 189 | return buf;
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| 190 | };
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| 191 |
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| 192 | // Helper (used in 2 places)
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| 193 | function buf2binstring(buf, len) {
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| 194 | // On Chrome, the arguments in a function call that are allowed is `65534`.
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| 195 | // If the length of the buffer is smaller than that, we can use this optimization,
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| 196 | // otherwise we will take a slower path.
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| 197 | if (len < 65534) {
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| 198 | if ((buf.subarray && STR_APPLY_UIA_OK) || (!buf.subarray && STR_APPLY_OK)) {
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| 199 | return String.fromCharCode.apply(null, utils.shrinkBuf(buf, len));
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| 200 | }
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| 201 | }
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| 202 |
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| 203 | var result = '';
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| 204 | for (var i = 0; i < len; i++) {
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| 205 | result += String.fromCharCode(buf[i]);
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| 206 | }
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| 207 | return result;
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| 208 | }
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| 209 |
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| 210 |
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| 211 | // Convert byte array to binary string
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| 212 | exports.buf2binstring = function (buf) {
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| 213 | return buf2binstring(buf, buf.length);
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| 214 | };
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| 215 |
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| 216 |
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| 217 | // Convert binary string (typed, when possible)
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| 218 | exports.binstring2buf = function (str) {
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| 219 | var buf = new utils.Buf8(str.length);
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| 220 | for (var i = 0, len = buf.length; i < len; i++) {
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| 221 | buf[i] = str.charCodeAt(i);
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| 222 | }
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| 223 | return buf;
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| 224 | };
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| 225 |
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| 226 |
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| 227 | // convert array to string
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| 228 | exports.buf2string = function (buf, max) {
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| 229 | var i, out, c, c_len;
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| 230 | var len = max || buf.length;
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| 231 |
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| 232 | // Reserve max possible length (2 words per char)
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| 233 | // NB: by unknown reasons, Array is significantly faster for
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| 234 | // String.fromCharCode.apply than Uint16Array.
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| 235 | var utf16buf = new Array(len * 2);
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| 236 |
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| 237 | for (out = 0, i = 0; i < len;) {
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| 238 | c = buf[i++];
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| 239 | // quick process ascii
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| 240 | if (c < 0x80) { utf16buf[out++] = c; continue; }
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| 241 |
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| 242 | c_len = _utf8len[c];
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| 243 | // skip 5 & 6 byte codes
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| 244 | if (c_len > 4) { utf16buf[out++] = 0xfffd; i += c_len - 1; continue; }
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| 245 |
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| 246 | // apply mask on first byte
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| 247 | c &= c_len === 2 ? 0x1f : c_len === 3 ? 0x0f : 0x07;
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| 248 | // join the rest
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| 249 | while (c_len > 1 && i < len) {
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| 250 | c = (c << 6) | (buf[i++] & 0x3f);
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| 251 | c_len--;
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| 252 | }
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| 253 |
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| 254 | // terminated by end of string?
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| 255 | if (c_len > 1) { utf16buf[out++] = 0xfffd; continue; }
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| 256 |
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| 257 | if (c < 0x10000) {
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| 258 | utf16buf[out++] = c;
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| 259 | } else {
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| 260 | c -= 0x10000;
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| 261 | utf16buf[out++] = 0xd800 | ((c >> 10) & 0x3ff);
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| 262 | utf16buf[out++] = 0xdc00 | (c & 0x3ff);
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| 263 | }
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| 264 | }
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| 265 |
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| 266 | return buf2binstring(utf16buf, out);
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| 267 | };
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| 268 |
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| 269 |
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| 270 | // Calculate max possible position in utf8 buffer,
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| 271 | // that will not break sequence. If that's not possible
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| 272 | // - (very small limits) return max size as is.
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| 273 | //
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| 274 | // buf[] - utf8 bytes array
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| 275 | // max - length limit (mandatory);
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| 276 | exports.utf8border = function (buf, max) {
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| 277 | var pos;
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| 278 |
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| 279 | max = max || buf.length;
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| 280 | if (max > buf.length) { max = buf.length; }
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| 281 |
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| 282 | // go back from last position, until start of sequence found
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| 283 | pos = max - 1;
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| 284 | while (pos >= 0 && (buf[pos] & 0xC0) === 0x80) { pos--; }
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| 285 |
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| 286 | // Very small and broken sequence,
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| 287 | // return max, because we should return something anyway.
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| 288 | if (pos < 0) { return max; }
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| 289 |
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| 290 | // If we came to start of buffer - that means buffer is too small,
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| 291 | // return max too.
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| 292 | if (pos === 0) { return max; }
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| 293 |
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| 294 | return (pos + _utf8len[buf[pos]] > max) ? pos : max;
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| 295 | };
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| 296 |
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| 297 | },{"./common":1}],3:[function(require,module,exports){
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| 298 | 'use strict';
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| 299 |
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| 300 | // Note: adler32 takes 12% for level 0 and 2% for level 6.
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| 301 | // It isn't worth it to make additional optimizations as in original.
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| 302 | // Small size is preferable.
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| 303 |
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| 304 | // (C) 1995-2013 Jean-loup Gailly and Mark Adler
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| 305 | // (C) 2014-2017 Vitaly Puzrin and Andrey Tupitsin
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| 306 | //
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| 307 | // This software is provided 'as-is', without any express or implied
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| 308 | // warranty. In no event will the authors be held liable for any damages
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| 309 | // arising from the use of this software.
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| 310 | //
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| 311 | // Permission is granted to anyone to use this software for any purpose,
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| 312 | // including commercial applications, and to alter it and redistribute it
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| 313 | // freely, subject to the following restrictions:
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| 314 | //
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| 315 | // 1. The origin of this software must not be misrepresented; you must not
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| 316 | // claim that you wrote the original software. If you use this software
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| 317 | // in a product, an acknowledgment in the product documentation would be
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| 318 | // appreciated but is not required.
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| 319 | // 2. Altered source versions must be plainly marked as such, and must not be
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| 320 | // misrepresented as being the original software.
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| 321 | // 3. This notice may not be removed or altered from any source distribution.
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| 322 |
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| 323 | function adler32(adler, buf, len, pos) {
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| 324 | var s1 = (adler & 0xffff) |0,
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| 325 | s2 = ((adler >>> 16) & 0xffff) |0,
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| 326 | n = 0;
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| 327 |
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| 328 | while (len !== 0) {
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| 329 | // Set limit ~ twice less than 5552, to keep
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| 330 | // s2 in 31-bits, because we force signed ints.
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| 331 | // in other case %= will fail.
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| 332 | n = len > 2000 ? 2000 : len;
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| 333 | len -= n;
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| 334 |
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| 335 | do {
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| 336 | s1 = (s1 + buf[pos++]) |0;
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| 337 | s2 = (s2 + s1) |0;
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| 338 | } while (--n);
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| 339 |
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| 340 | s1 %= 65521;
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| 341 | s2 %= 65521;
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| 342 | }
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| 343 |
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| 344 | return (s1 | (s2 << 16)) |0;
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| 345 | }
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| 346 |
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| 347 |
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| 348 | module.exports = adler32;
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| 349 |
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| 350 | },{}],4:[function(require,module,exports){
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| 351 | 'use strict';
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| 352 |
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| 353 | // (C) 1995-2013 Jean-loup Gailly and Mark Adler
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| 354 | // (C) 2014-2017 Vitaly Puzrin and Andrey Tupitsin
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| 355 | //
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| 356 | // This software is provided 'as-is', without any express or implied
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| 357 | // warranty. In no event will the authors be held liable for any damages
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| 358 | // arising from the use of this software.
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| 359 | //
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| 360 | // Permission is granted to anyone to use this software for any purpose,
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| 361 | // including commercial applications, and to alter it and redistribute it
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| 362 | // freely, subject to the following restrictions:
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| 363 | //
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| 364 | // 1. The origin of this software must not be misrepresented; you must not
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| 365 | // claim that you wrote the original software. If you use this software
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| 366 | // in a product, an acknowledgment in the product documentation would be
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| 367 | // appreciated but is not required.
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| 368 | // 2. Altered source versions must be plainly marked as such, and must not be
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| 369 | // misrepresented as being the original software.
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| 370 | // 3. This notice may not be removed or altered from any source distribution.
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| 371 |
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| 372 | module.exports = {
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| 373 |
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| 374 | /* Allowed flush values; see deflate() and inflate() below for details */
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| 375 | Z_NO_FLUSH: 0,
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| 376 | Z_PARTIAL_FLUSH: 1,
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| 377 | Z_SYNC_FLUSH: 2,
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| 378 | Z_FULL_FLUSH: 3,
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| 379 | Z_FINISH: 4,
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| 380 | Z_BLOCK: 5,
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| 381 | Z_TREES: 6,
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| 382 |
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| 383 | /* Return codes for the compression/decompression functions. Negative values
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| 384 | * are errors, positive values are used for special but normal events.
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| 385 | */
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| 386 | Z_OK: 0,
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| 387 | Z_STREAM_END: 1,
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| 388 | Z_NEED_DICT: 2,
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| 389 | Z_ERRNO: -1,
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| 390 | Z_STREAM_ERROR: -2,
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| 391 | Z_DATA_ERROR: -3,
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| 392 | //Z_MEM_ERROR: -4,
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| 393 | Z_BUF_ERROR: -5,
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| 394 | //Z_VERSION_ERROR: -6,
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| 395 |
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| 396 | /* compression levels */
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| 397 | Z_NO_COMPRESSION: 0,
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| 398 | Z_BEST_SPEED: 1,
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| 399 | Z_BEST_COMPRESSION: 9,
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| 400 | Z_DEFAULT_COMPRESSION: -1,
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| 401 |
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| 402 |
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| 403 | Z_FILTERED: 1,
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| 404 | Z_HUFFMAN_ONLY: 2,
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| 405 | Z_RLE: 3,
|
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| 406 | Z_FIXED: 4,
|
---|
| 407 | Z_DEFAULT_STRATEGY: 0,
|
---|
| 408 |
|
---|
| 409 | /* Possible values of the data_type field (though see inflate()) */
|
---|
| 410 | Z_BINARY: 0,
|
---|
| 411 | Z_TEXT: 1,
|
---|
| 412 | //Z_ASCII: 1, // = Z_TEXT (deprecated)
|
---|
| 413 | Z_UNKNOWN: 2,
|
---|
| 414 |
|
---|
| 415 | /* The deflate compression method */
|
---|
| 416 | Z_DEFLATED: 8
|
---|
| 417 | //Z_NULL: null // Use -1 or null inline, depending on var type
|
---|
| 418 | };
|
---|
| 419 |
|
---|
| 420 | },{}],5:[function(require,module,exports){
|
---|
| 421 | 'use strict';
|
---|
| 422 |
|
---|
| 423 | // Note: we can't get significant speed boost here.
|
---|
| 424 | // So write code to minimize size - no pregenerated tables
|
---|
| 425 | // and array tools dependencies.
|
---|
| 426 |
|
---|
| 427 | // (C) 1995-2013 Jean-loup Gailly and Mark Adler
|
---|
| 428 | // (C) 2014-2017 Vitaly Puzrin and Andrey Tupitsin
|
---|
| 429 | //
|
---|
| 430 | // This software is provided 'as-is', without any express or implied
|
---|
| 431 | // warranty. In no event will the authors be held liable for any damages
|
---|
| 432 | // arising from the use of this software.
|
---|
| 433 | //
|
---|
| 434 | // Permission is granted to anyone to use this software for any purpose,
|
---|
| 435 | // including commercial applications, and to alter it and redistribute it
|
---|
| 436 | // freely, subject to the following restrictions:
|
---|
| 437 | //
|
---|
| 438 | // 1. The origin of this software must not be misrepresented; you must not
|
---|
| 439 | // claim that you wrote the original software. If you use this software
|
---|
| 440 | // in a product, an acknowledgment in the product documentation would be
|
---|
| 441 | // appreciated but is not required.
|
---|
| 442 | // 2. Altered source versions must be plainly marked as such, and must not be
|
---|
| 443 | // misrepresented as being the original software.
|
---|
| 444 | // 3. This notice may not be removed or altered from any source distribution.
|
---|
| 445 |
|
---|
| 446 | // Use ordinary array, since untyped makes no boost here
|
---|
| 447 | function makeTable() {
|
---|
| 448 | var c, table = [];
|
---|
| 449 |
|
---|
| 450 | for (var n = 0; n < 256; n++) {
|
---|
| 451 | c = n;
|
---|
| 452 | for (var k = 0; k < 8; k++) {
|
---|
| 453 | c = ((c & 1) ? (0xEDB88320 ^ (c >>> 1)) : (c >>> 1));
|
---|
| 454 | }
|
---|
| 455 | table[n] = c;
|
---|
| 456 | }
|
---|
| 457 |
|
---|
| 458 | return table;
|
---|
| 459 | }
|
---|
| 460 |
|
---|
| 461 | // Create table on load. Just 255 signed longs. Not a problem.
|
---|
| 462 | var crcTable = makeTable();
|
---|
| 463 |
|
---|
| 464 |
|
---|
| 465 | function crc32(crc, buf, len, pos) {
|
---|
| 466 | var t = crcTable,
|
---|
| 467 | end = pos + len;
|
---|
| 468 |
|
---|
| 469 | crc ^= -1;
|
---|
| 470 |
|
---|
| 471 | for (var i = pos; i < end; i++) {
|
---|
| 472 | crc = (crc >>> 8) ^ t[(crc ^ buf[i]) & 0xFF];
|
---|
| 473 | }
|
---|
| 474 |
|
---|
| 475 | return (crc ^ (-1)); // >>> 0;
|
---|
| 476 | }
|
---|
| 477 |
|
---|
| 478 |
|
---|
| 479 | module.exports = crc32;
|
---|
| 480 |
|
---|
| 481 | },{}],6:[function(require,module,exports){
|
---|
| 482 | 'use strict';
|
---|
| 483 |
|
---|
| 484 | // (C) 1995-2013 Jean-loup Gailly and Mark Adler
|
---|
| 485 | // (C) 2014-2017 Vitaly Puzrin and Andrey Tupitsin
|
---|
| 486 | //
|
---|
| 487 | // This software is provided 'as-is', without any express or implied
|
---|
| 488 | // warranty. In no event will the authors be held liable for any damages
|
---|
| 489 | // arising from the use of this software.
|
---|
| 490 | //
|
---|
| 491 | // Permission is granted to anyone to use this software for any purpose,
|
---|
| 492 | // including commercial applications, and to alter it and redistribute it
|
---|
| 493 | // freely, subject to the following restrictions:
|
---|
| 494 | //
|
---|
| 495 | // 1. The origin of this software must not be misrepresented; you must not
|
---|
| 496 | // claim that you wrote the original software. If you use this software
|
---|
| 497 | // in a product, an acknowledgment in the product documentation would be
|
---|
| 498 | // appreciated but is not required.
|
---|
| 499 | // 2. Altered source versions must be plainly marked as such, and must not be
|
---|
| 500 | // misrepresented as being the original software.
|
---|
| 501 | // 3. This notice may not be removed or altered from any source distribution.
|
---|
| 502 |
|
---|
| 503 | function GZheader() {
|
---|
| 504 | /* true if compressed data believed to be text */
|
---|
| 505 | this.text = 0;
|
---|
| 506 | /* modification time */
|
---|
| 507 | this.time = 0;
|
---|
| 508 | /* extra flags (not used when writing a gzip file) */
|
---|
| 509 | this.xflags = 0;
|
---|
| 510 | /* operating system */
|
---|
| 511 | this.os = 0;
|
---|
| 512 | /* pointer to extra field or Z_NULL if none */
|
---|
| 513 | this.extra = null;
|
---|
| 514 | /* extra field length (valid if extra != Z_NULL) */
|
---|
| 515 | this.extra_len = 0; // Actually, we don't need it in JS,
|
---|
| 516 | // but leave for few code modifications
|
---|
| 517 |
|
---|
| 518 | //
|
---|
| 519 | // Setup limits is not necessary because in js we should not preallocate memory
|
---|
| 520 | // for inflate use constant limit in 65536 bytes
|
---|
| 521 | //
|
---|
| 522 |
|
---|
| 523 | /* space at extra (only when reading header) */
|
---|
| 524 | // this.extra_max = 0;
|
---|
| 525 | /* pointer to zero-terminated file name or Z_NULL */
|
---|
| 526 | this.name = '';
|
---|
| 527 | /* space at name (only when reading header) */
|
---|
| 528 | // this.name_max = 0;
|
---|
| 529 | /* pointer to zero-terminated comment or Z_NULL */
|
---|
| 530 | this.comment = '';
|
---|
| 531 | /* space at comment (only when reading header) */
|
---|
| 532 | // this.comm_max = 0;
|
---|
| 533 | /* true if there was or will be a header crc */
|
---|
| 534 | this.hcrc = 0;
|
---|
| 535 | /* true when done reading gzip header (not used when writing a gzip file) */
|
---|
| 536 | this.done = false;
|
---|
| 537 | }
|
---|
| 538 |
|
---|
| 539 | module.exports = GZheader;
|
---|
| 540 |
|
---|
| 541 | },{}],7:[function(require,module,exports){
|
---|
| 542 | 'use strict';
|
---|
| 543 |
|
---|
| 544 | // (C) 1995-2013 Jean-loup Gailly and Mark Adler
|
---|
| 545 | // (C) 2014-2017 Vitaly Puzrin and Andrey Tupitsin
|
---|
| 546 | //
|
---|
| 547 | // This software is provided 'as-is', without any express or implied
|
---|
| 548 | // warranty. In no event will the authors be held liable for any damages
|
---|
| 549 | // arising from the use of this software.
|
---|
| 550 | //
|
---|
| 551 | // Permission is granted to anyone to use this software for any purpose,
|
---|
| 552 | // including commercial applications, and to alter it and redistribute it
|
---|
| 553 | // freely, subject to the following restrictions:
|
---|
| 554 | //
|
---|
| 555 | // 1. The origin of this software must not be misrepresented; you must not
|
---|
| 556 | // claim that you wrote the original software. If you use this software
|
---|
| 557 | // in a product, an acknowledgment in the product documentation would be
|
---|
| 558 | // appreciated but is not required.
|
---|
| 559 | // 2. Altered source versions must be plainly marked as such, and must not be
|
---|
| 560 | // misrepresented as being the original software.
|
---|
| 561 | // 3. This notice may not be removed or altered from any source distribution.
|
---|
| 562 |
|
---|
| 563 | // See state defs from inflate.js
|
---|
| 564 | var BAD = 30; /* got a data error -- remain here until reset */
|
---|
| 565 | var TYPE = 12; /* i: waiting for type bits, including last-flag bit */
|
---|
| 566 |
|
---|
| 567 | /*
|
---|
| 568 | Decode literal, length, and distance codes and write out the resulting
|
---|
| 569 | literal and match bytes until either not enough input or output is
|
---|
| 570 | available, an end-of-block is encountered, or a data error is encountered.
|
---|
| 571 | When large enough input and output buffers are supplied to inflate(), for
|
---|
| 572 | example, a 16K input buffer and a 64K output buffer, more than 95% of the
|
---|
| 573 | inflate execution time is spent in this routine.
|
---|
| 574 |
|
---|
| 575 | Entry assumptions:
|
---|
| 576 |
|
---|
| 577 | state.mode === LEN
|
---|
| 578 | strm.avail_in >= 6
|
---|
| 579 | strm.avail_out >= 258
|
---|
| 580 | start >= strm.avail_out
|
---|
| 581 | state.bits < 8
|
---|
| 582 |
|
---|
| 583 | On return, state.mode is one of:
|
---|
| 584 |
|
---|
| 585 | LEN -- ran out of enough output space or enough available input
|
---|
| 586 | TYPE -- reached end of block code, inflate() to interpret next block
|
---|
| 587 | BAD -- error in block data
|
---|
| 588 |
|
---|
| 589 | Notes:
|
---|
| 590 |
|
---|
| 591 | - The maximum input bits used by a length/distance pair is 15 bits for the
|
---|
| 592 | length code, 5 bits for the length extra, 15 bits for the distance code,
|
---|
| 593 | and 13 bits for the distance extra. This totals 48 bits, or six bytes.
|
---|
| 594 | Therefore if strm.avail_in >= 6, then there is enough input to avoid
|
---|
| 595 | checking for available input while decoding.
|
---|
| 596 |
|
---|
| 597 | - The maximum bytes that a single length/distance pair can output is 258
|
---|
| 598 | bytes, which is the maximum length that can be coded. inflate_fast()
|
---|
| 599 | requires strm.avail_out >= 258 for each loop to avoid checking for
|
---|
| 600 | output space.
|
---|
| 601 | */
|
---|
| 602 | module.exports = function inflate_fast(strm, start) {
|
---|
| 603 | var state;
|
---|
| 604 | var _in; /* local strm.input */
|
---|
| 605 | var last; /* have enough input while in < last */
|
---|
| 606 | var _out; /* local strm.output */
|
---|
| 607 | var beg; /* inflate()'s initial strm.output */
|
---|
| 608 | var end; /* while out < end, enough space available */
|
---|
| 609 | //#ifdef INFLATE_STRICT
|
---|
| 610 | var dmax; /* maximum distance from zlib header */
|
---|
| 611 | //#endif
|
---|
| 612 | var wsize; /* window size or zero if not using window */
|
---|
| 613 | var whave; /* valid bytes in the window */
|
---|
| 614 | var wnext; /* window write index */
|
---|
| 615 | // Use `s_window` instead `window`, avoid conflict with instrumentation tools
|
---|
| 616 | var s_window; /* allocated sliding window, if wsize != 0 */
|
---|
| 617 | var hold; /* local strm.hold */
|
---|
| 618 | var bits; /* local strm.bits */
|
---|
| 619 | var lcode; /* local strm.lencode */
|
---|
| 620 | var dcode; /* local strm.distcode */
|
---|
| 621 | var lmask; /* mask for first level of length codes */
|
---|
| 622 | var dmask; /* mask for first level of distance codes */
|
---|
| 623 | var here; /* retrieved table entry */
|
---|
| 624 | var op; /* code bits, operation, extra bits, or */
|
---|
| 625 | /* window position, window bytes to copy */
|
---|
| 626 | var len; /* match length, unused bytes */
|
---|
| 627 | var dist; /* match distance */
|
---|
| 628 | var from; /* where to copy match from */
|
---|
| 629 | var from_source;
|
---|
| 630 |
|
---|
| 631 |
|
---|
| 632 | var input, output; // JS specific, because we have no pointers
|
---|
| 633 |
|
---|
| 634 | /* copy state to local variables */
|
---|
| 635 | state = strm.state;
|
---|
| 636 | //here = state.here;
|
---|
| 637 | _in = strm.next_in;
|
---|
| 638 | input = strm.input;
|
---|
| 639 | last = _in + (strm.avail_in - 5);
|
---|
| 640 | _out = strm.next_out;
|
---|
| 641 | output = strm.output;
|
---|
| 642 | beg = _out - (start - strm.avail_out);
|
---|
| 643 | end = _out + (strm.avail_out - 257);
|
---|
| 644 | //#ifdef INFLATE_STRICT
|
---|
| 645 | dmax = state.dmax;
|
---|
| 646 | //#endif
|
---|
| 647 | wsize = state.wsize;
|
---|
| 648 | whave = state.whave;
|
---|
| 649 | wnext = state.wnext;
|
---|
| 650 | s_window = state.window;
|
---|
| 651 | hold = state.hold;
|
---|
| 652 | bits = state.bits;
|
---|
| 653 | lcode = state.lencode;
|
---|
| 654 | dcode = state.distcode;
|
---|
| 655 | lmask = (1 << state.lenbits) - 1;
|
---|
| 656 | dmask = (1 << state.distbits) - 1;
|
---|
| 657 |
|
---|
| 658 |
|
---|
| 659 | /* decode literals and length/distances until end-of-block or not enough
|
---|
| 660 | input data or output space */
|
---|
| 661 |
|
---|
| 662 | top:
|
---|
| 663 | do {
|
---|
| 664 | if (bits < 15) {
|
---|
| 665 | hold += input[_in++] << bits;
|
---|
| 666 | bits += 8;
|
---|
| 667 | hold += input[_in++] << bits;
|
---|
| 668 | bits += 8;
|
---|
| 669 | }
|
---|
| 670 |
|
---|
| 671 | here = lcode[hold & lmask];
|
---|
| 672 |
|
---|
| 673 | dolen:
|
---|
| 674 | for (;;) { // Goto emulation
|
---|
| 675 | op = here >>> 24/*here.bits*/;
|
---|
| 676 | hold >>>= op;
|
---|
| 677 | bits -= op;
|
---|
| 678 | op = (here >>> 16) & 0xff/*here.op*/;
|
---|
| 679 | if (op === 0) { /* literal */
|
---|
| 680 | //Tracevv((stderr, here.val >= 0x20 && here.val < 0x7f ?
|
---|
| 681 | // "inflate: literal '%c'\n" :
|
---|
| 682 | // "inflate: literal 0x%02x\n", here.val));
|
---|
| 683 | output[_out++] = here & 0xffff/*here.val*/;
|
---|
| 684 | }
|
---|
| 685 | else if (op & 16) { /* length base */
|
---|
| 686 | len = here & 0xffff/*here.val*/;
|
---|
| 687 | op &= 15; /* number of extra bits */
|
---|
| 688 | if (op) {
|
---|
| 689 | if (bits < op) {
|
---|
| 690 | hold += input[_in++] << bits;
|
---|
| 691 | bits += 8;
|
---|
| 692 | }
|
---|
| 693 | len += hold & ((1 << op) - 1);
|
---|
| 694 | hold >>>= op;
|
---|
| 695 | bits -= op;
|
---|
| 696 | }
|
---|
| 697 | //Tracevv((stderr, "inflate: length %u\n", len));
|
---|
| 698 | if (bits < 15) {
|
---|
| 699 | hold += input[_in++] << bits;
|
---|
| 700 | bits += 8;
|
---|
| 701 | hold += input[_in++] << bits;
|
---|
| 702 | bits += 8;
|
---|
| 703 | }
|
---|
| 704 | here = dcode[hold & dmask];
|
---|
| 705 |
|
---|
| 706 | dodist:
|
---|
| 707 | for (;;) { // goto emulation
|
---|
| 708 | op = here >>> 24/*here.bits*/;
|
---|
| 709 | hold >>>= op;
|
---|
| 710 | bits -= op;
|
---|
| 711 | op = (here >>> 16) & 0xff/*here.op*/;
|
---|
| 712 |
|
---|
| 713 | if (op & 16) { /* distance base */
|
---|
| 714 | dist = here & 0xffff/*here.val*/;
|
---|
| 715 | op &= 15; /* number of extra bits */
|
---|
| 716 | if (bits < op) {
|
---|
| 717 | hold += input[_in++] << bits;
|
---|
| 718 | bits += 8;
|
---|
| 719 | if (bits < op) {
|
---|
| 720 | hold += input[_in++] << bits;
|
---|
| 721 | bits += 8;
|
---|
| 722 | }
|
---|
| 723 | }
|
---|
| 724 | dist += hold & ((1 << op) - 1);
|
---|
| 725 | //#ifdef INFLATE_STRICT
|
---|
| 726 | if (dist > dmax) {
|
---|
| 727 | strm.msg = 'invalid distance too far back';
|
---|
| 728 | state.mode = BAD;
|
---|
| 729 | break top;
|
---|
| 730 | }
|
---|
| 731 | //#endif
|
---|
| 732 | hold >>>= op;
|
---|
| 733 | bits -= op;
|
---|
| 734 | //Tracevv((stderr, "inflate: distance %u\n", dist));
|
---|
| 735 | op = _out - beg; /* max distance in output */
|
---|
| 736 | if (dist > op) { /* see if copy from window */
|
---|
| 737 | op = dist - op; /* distance back in window */
|
---|
| 738 | if (op > whave) {
|
---|
| 739 | if (state.sane) {
|
---|
| 740 | strm.msg = 'invalid distance too far back';
|
---|
| 741 | state.mode = BAD;
|
---|
| 742 | break top;
|
---|
| 743 | }
|
---|
| 744 |
|
---|
| 745 | // (!) This block is disabled in zlib defaults,
|
---|
| 746 | // don't enable it for binary compatibility
|
---|
| 747 | //#ifdef INFLATE_ALLOW_INVALID_DISTANCE_TOOFAR_ARRR
|
---|
| 748 | // if (len <= op - whave) {
|
---|
| 749 | // do {
|
---|
| 750 | // output[_out++] = 0;
|
---|
| 751 | // } while (--len);
|
---|
| 752 | // continue top;
|
---|
| 753 | // }
|
---|
| 754 | // len -= op - whave;
|
---|
| 755 | // do {
|
---|
| 756 | // output[_out++] = 0;
|
---|
| 757 | // } while (--op > whave);
|
---|
| 758 | // if (op === 0) {
|
---|
| 759 | // from = _out - dist;
|
---|
| 760 | // do {
|
---|
| 761 | // output[_out++] = output[from++];
|
---|
| 762 | // } while (--len);
|
---|
| 763 | // continue top;
|
---|
| 764 | // }
|
---|
| 765 | //#endif
|
---|
| 766 | }
|
---|
| 767 | from = 0; // window index
|
---|
| 768 | from_source = s_window;
|
---|
| 769 | if (wnext === 0) { /* very common case */
|
---|
| 770 | from += wsize - op;
|
---|
| 771 | if (op < len) { /* some from window */
|
---|
| 772 | len -= op;
|
---|
| 773 | do {
|
---|
| 774 | output[_out++] = s_window[from++];
|
---|
| 775 | } while (--op);
|
---|
| 776 | from = _out - dist; /* rest from output */
|
---|
| 777 | from_source = output;
|
---|
| 778 | }
|
---|
| 779 | }
|
---|
| 780 | else if (wnext < op) { /* wrap around window */
|
---|
| 781 | from += wsize + wnext - op;
|
---|
| 782 | op -= wnext;
|
---|
| 783 | if (op < len) { /* some from end of window */
|
---|
| 784 | len -= op;
|
---|
| 785 | do {
|
---|
| 786 | output[_out++] = s_window[from++];
|
---|
| 787 | } while (--op);
|
---|
| 788 | from = 0;
|
---|
| 789 | if (wnext < len) { /* some from start of window */
|
---|
| 790 | op = wnext;
|
---|
| 791 | len -= op;
|
---|
| 792 | do {
|
---|
| 793 | output[_out++] = s_window[from++];
|
---|
| 794 | } while (--op);
|
---|
| 795 | from = _out - dist; /* rest from output */
|
---|
| 796 | from_source = output;
|
---|
| 797 | }
|
---|
| 798 | }
|
---|
| 799 | }
|
---|
| 800 | else { /* contiguous in window */
|
---|
| 801 | from += wnext - op;
|
---|
| 802 | if (op < len) { /* some from window */
|
---|
| 803 | len -= op;
|
---|
| 804 | do {
|
---|
| 805 | output[_out++] = s_window[from++];
|
---|
| 806 | } while (--op);
|
---|
| 807 | from = _out - dist; /* rest from output */
|
---|
| 808 | from_source = output;
|
---|
| 809 | }
|
---|
| 810 | }
|
---|
| 811 | while (len > 2) {
|
---|
| 812 | output[_out++] = from_source[from++];
|
---|
| 813 | output[_out++] = from_source[from++];
|
---|
| 814 | output[_out++] = from_source[from++];
|
---|
| 815 | len -= 3;
|
---|
| 816 | }
|
---|
| 817 | if (len) {
|
---|
| 818 | output[_out++] = from_source[from++];
|
---|
| 819 | if (len > 1) {
|
---|
| 820 | output[_out++] = from_source[from++];
|
---|
| 821 | }
|
---|
| 822 | }
|
---|
| 823 | }
|
---|
| 824 | else {
|
---|
| 825 | from = _out - dist; /* copy direct from output */
|
---|
| 826 | do { /* minimum length is three */
|
---|
| 827 | output[_out++] = output[from++];
|
---|
| 828 | output[_out++] = output[from++];
|
---|
| 829 | output[_out++] = output[from++];
|
---|
| 830 | len -= 3;
|
---|
| 831 | } while (len > 2);
|
---|
| 832 | if (len) {
|
---|
| 833 | output[_out++] = output[from++];
|
---|
| 834 | if (len > 1) {
|
---|
| 835 | output[_out++] = output[from++];
|
---|
| 836 | }
|
---|
| 837 | }
|
---|
| 838 | }
|
---|
| 839 | }
|
---|
| 840 | else if ((op & 64) === 0) { /* 2nd level distance code */
|
---|
| 841 | here = dcode[(here & 0xffff)/*here.val*/ + (hold & ((1 << op) - 1))];
|
---|
| 842 | continue dodist;
|
---|
| 843 | }
|
---|
| 844 | else {
|
---|
| 845 | strm.msg = 'invalid distance code';
|
---|
| 846 | state.mode = BAD;
|
---|
| 847 | break top;
|
---|
| 848 | }
|
---|
| 849 |
|
---|
| 850 | break; // need to emulate goto via "continue"
|
---|
| 851 | }
|
---|
| 852 | }
|
---|
| 853 | else if ((op & 64) === 0) { /* 2nd level length code */
|
---|
| 854 | here = lcode[(here & 0xffff)/*here.val*/ + (hold & ((1 << op) - 1))];
|
---|
| 855 | continue dolen;
|
---|
| 856 | }
|
---|
| 857 | else if (op & 32) { /* end-of-block */
|
---|
| 858 | //Tracevv((stderr, "inflate: end of block\n"));
|
---|
| 859 | state.mode = TYPE;
|
---|
| 860 | break top;
|
---|
| 861 | }
|
---|
| 862 | else {
|
---|
| 863 | strm.msg = 'invalid literal/length code';
|
---|
| 864 | state.mode = BAD;
|
---|
| 865 | break top;
|
---|
| 866 | }
|
---|
| 867 |
|
---|
| 868 | break; // need to emulate goto via "continue"
|
---|
| 869 | }
|
---|
| 870 | } while (_in < last && _out < end);
|
---|
| 871 |
|
---|
| 872 | /* return unused bytes (on entry, bits < 8, so in won't go too far back) */
|
---|
| 873 | len = bits >> 3;
|
---|
| 874 | _in -= len;
|
---|
| 875 | bits -= len << 3;
|
---|
| 876 | hold &= (1 << bits) - 1;
|
---|
| 877 |
|
---|
| 878 | /* update state and return */
|
---|
| 879 | strm.next_in = _in;
|
---|
| 880 | strm.next_out = _out;
|
---|
| 881 | strm.avail_in = (_in < last ? 5 + (last - _in) : 5 - (_in - last));
|
---|
| 882 | strm.avail_out = (_out < end ? 257 + (end - _out) : 257 - (_out - end));
|
---|
| 883 | state.hold = hold;
|
---|
| 884 | state.bits = bits;
|
---|
| 885 | return;
|
---|
| 886 | };
|
---|
| 887 |
|
---|
| 888 | },{}],8:[function(require,module,exports){
|
---|
| 889 | 'use strict';
|
---|
| 890 |
|
---|
| 891 | // (C) 1995-2013 Jean-loup Gailly and Mark Adler
|
---|
| 892 | // (C) 2014-2017 Vitaly Puzrin and Andrey Tupitsin
|
---|
| 893 | //
|
---|
| 894 | // This software is provided 'as-is', without any express or implied
|
---|
| 895 | // warranty. In no event will the authors be held liable for any damages
|
---|
| 896 | // arising from the use of this software.
|
---|
| 897 | //
|
---|
| 898 | // Permission is granted to anyone to use this software for any purpose,
|
---|
| 899 | // including commercial applications, and to alter it and redistribute it
|
---|
| 900 | // freely, subject to the following restrictions:
|
---|
| 901 | //
|
---|
| 902 | // 1. The origin of this software must not be misrepresented; you must not
|
---|
| 903 | // claim that you wrote the original software. If you use this software
|
---|
| 904 | // in a product, an acknowledgment in the product documentation would be
|
---|
| 905 | // appreciated but is not required.
|
---|
| 906 | // 2. Altered source versions must be plainly marked as such, and must not be
|
---|
| 907 | // misrepresented as being the original software.
|
---|
| 908 | // 3. This notice may not be removed or altered from any source distribution.
|
---|
| 909 |
|
---|
| 910 | var utils = require('../utils/common');
|
---|
| 911 | var adler32 = require('./adler32');
|
---|
| 912 | var crc32 = require('./crc32');
|
---|
| 913 | var inflate_fast = require('./inffast');
|
---|
| 914 | var inflate_table = require('./inftrees');
|
---|
| 915 |
|
---|
| 916 | var CODES = 0;
|
---|
| 917 | var LENS = 1;
|
---|
| 918 | var DISTS = 2;
|
---|
| 919 |
|
---|
| 920 | /* Public constants ==========================================================*/
|
---|
| 921 | /* ===========================================================================*/
|
---|
| 922 |
|
---|
| 923 |
|
---|
| 924 | /* Allowed flush values; see deflate() and inflate() below for details */
|
---|
| 925 | //var Z_NO_FLUSH = 0;
|
---|
| 926 | //var Z_PARTIAL_FLUSH = 1;
|
---|
| 927 | //var Z_SYNC_FLUSH = 2;
|
---|
| 928 | //var Z_FULL_FLUSH = 3;
|
---|
| 929 | var Z_FINISH = 4;
|
---|
| 930 | var Z_BLOCK = 5;
|
---|
| 931 | var Z_TREES = 6;
|
---|
| 932 |
|
---|
| 933 |
|
---|
| 934 | /* Return codes for the compression/decompression functions. Negative values
|
---|
| 935 | * are errors, positive values are used for special but normal events.
|
---|
| 936 | */
|
---|
| 937 | var Z_OK = 0;
|
---|
| 938 | var Z_STREAM_END = 1;
|
---|
| 939 | var Z_NEED_DICT = 2;
|
---|
| 940 | //var Z_ERRNO = -1;
|
---|
| 941 | var Z_STREAM_ERROR = -2;
|
---|
| 942 | var Z_DATA_ERROR = -3;
|
---|
| 943 | var Z_MEM_ERROR = -4;
|
---|
| 944 | var Z_BUF_ERROR = -5;
|
---|
| 945 | //var Z_VERSION_ERROR = -6;
|
---|
| 946 |
|
---|
| 947 | /* The deflate compression method */
|
---|
| 948 | var Z_DEFLATED = 8;
|
---|
| 949 |
|
---|
| 950 |
|
---|
| 951 | /* STATES ====================================================================*/
|
---|
| 952 | /* ===========================================================================*/
|
---|
| 953 |
|
---|
| 954 |
|
---|
| 955 | var HEAD = 1; /* i: waiting for magic header */
|
---|
| 956 | var FLAGS = 2; /* i: waiting for method and flags (gzip) */
|
---|
| 957 | var TIME = 3; /* i: waiting for modification time (gzip) */
|
---|
| 958 | var OS = 4; /* i: waiting for extra flags and operating system (gzip) */
|
---|
| 959 | var EXLEN = 5; /* i: waiting for extra length (gzip) */
|
---|
| 960 | var EXTRA = 6; /* i: waiting for extra bytes (gzip) */
|
---|
| 961 | var NAME = 7; /* i: waiting for end of file name (gzip) */
|
---|
| 962 | var COMMENT = 8; /* i: waiting for end of comment (gzip) */
|
---|
| 963 | var HCRC = 9; /* i: waiting for header crc (gzip) */
|
---|
| 964 | var DICTID = 10; /* i: waiting for dictionary check value */
|
---|
| 965 | var DICT = 11; /* waiting for inflateSetDictionary() call */
|
---|
| 966 | var TYPE = 12; /* i: waiting for type bits, including last-flag bit */
|
---|
| 967 | var TYPEDO = 13; /* i: same, but skip check to exit inflate on new block */
|
---|
| 968 | var STORED = 14; /* i: waiting for stored size (length and complement) */
|
---|
| 969 | var COPY_ = 15; /* i/o: same as COPY below, but only first time in */
|
---|
| 970 | var COPY = 16; /* i/o: waiting for input or output to copy stored block */
|
---|
| 971 | var TABLE = 17; /* i: waiting for dynamic block table lengths */
|
---|
| 972 | var LENLENS = 18; /* i: waiting for code length code lengths */
|
---|
| 973 | var CODELENS = 19; /* i: waiting for length/lit and distance code lengths */
|
---|
| 974 | var LEN_ = 20; /* i: same as LEN below, but only first time in */
|
---|
| 975 | var LEN = 21; /* i: waiting for length/lit/eob code */
|
---|
| 976 | var LENEXT = 22; /* i: waiting for length extra bits */
|
---|
| 977 | var DIST = 23; /* i: waiting for distance code */
|
---|
| 978 | var DISTEXT = 24; /* i: waiting for distance extra bits */
|
---|
| 979 | var MATCH = 25; /* o: waiting for output space to copy string */
|
---|
| 980 | var LIT = 26; /* o: waiting for output space to write literal */
|
---|
| 981 | var CHECK = 27; /* i: waiting for 32-bit check value */
|
---|
| 982 | var LENGTH = 28; /* i: waiting for 32-bit length (gzip) */
|
---|
| 983 | var DONE = 29; /* finished check, done -- remain here until reset */
|
---|
| 984 | var BAD = 30; /* got a data error -- remain here until reset */
|
---|
| 985 | var MEM = 31; /* got an inflate() memory error -- remain here until reset */
|
---|
| 986 | var SYNC = 32; /* looking for synchronization bytes to restart inflate() */
|
---|
| 987 |
|
---|
| 988 | /* ===========================================================================*/
|
---|
| 989 |
|
---|
| 990 |
|
---|
| 991 |
|
---|
| 992 | var ENOUGH_LENS = 852;
|
---|
| 993 | var ENOUGH_DISTS = 592;
|
---|
| 994 | //var ENOUGH = (ENOUGH_LENS+ENOUGH_DISTS);
|
---|
| 995 |
|
---|
| 996 | var MAX_WBITS = 15;
|
---|
| 997 | /* 32K LZ77 window */
|
---|
| 998 | var DEF_WBITS = MAX_WBITS;
|
---|
| 999 |
|
---|
| 1000 |
|
---|
| 1001 | function zswap32(q) {
|
---|
| 1002 | return (((q >>> 24) & 0xff) +
|
---|
| 1003 | ((q >>> 8) & 0xff00) +
|
---|
| 1004 | ((q & 0xff00) << 8) +
|
---|
| 1005 | ((q & 0xff) << 24));
|
---|
| 1006 | }
|
---|
| 1007 |
|
---|
| 1008 |
|
---|
| 1009 | function InflateState() {
|
---|
| 1010 | this.mode = 0; /* current inflate mode */
|
---|
| 1011 | this.last = false; /* true if processing last block */
|
---|
| 1012 | this.wrap = 0; /* bit 0 true for zlib, bit 1 true for gzip */
|
---|
| 1013 | this.havedict = false; /* true if dictionary provided */
|
---|
| 1014 | this.flags = 0; /* gzip header method and flags (0 if zlib) */
|
---|
| 1015 | this.dmax = 0; /* zlib header max distance (INFLATE_STRICT) */
|
---|
| 1016 | this.check = 0; /* protected copy of check value */
|
---|
| 1017 | this.total = 0; /* protected copy of output count */
|
---|
| 1018 | // TODO: may be {}
|
---|
| 1019 | this.head = null; /* where to save gzip header information */
|
---|
| 1020 |
|
---|
| 1021 | /* sliding window */
|
---|
| 1022 | this.wbits = 0; /* log base 2 of requested window size */
|
---|
| 1023 | this.wsize = 0; /* window size or zero if not using window */
|
---|
| 1024 | this.whave = 0; /* valid bytes in the window */
|
---|
| 1025 | this.wnext = 0; /* window write index */
|
---|
| 1026 | this.window = null; /* allocated sliding window, if needed */
|
---|
| 1027 |
|
---|
| 1028 | /* bit accumulator */
|
---|
| 1029 | this.hold = 0; /* input bit accumulator */
|
---|
| 1030 | this.bits = 0; /* number of bits in "in" */
|
---|
| 1031 |
|
---|
| 1032 | /* for string and stored block copying */
|
---|
| 1033 | this.length = 0; /* literal or length of data to copy */
|
---|
| 1034 | this.offset = 0; /* distance back to copy string from */
|
---|
| 1035 |
|
---|
| 1036 | /* for table and code decoding */
|
---|
| 1037 | this.extra = 0; /* extra bits needed */
|
---|
| 1038 |
|
---|
| 1039 | /* fixed and dynamic code tables */
|
---|
| 1040 | this.lencode = null; /* starting table for length/literal codes */
|
---|
| 1041 | this.distcode = null; /* starting table for distance codes */
|
---|
| 1042 | this.lenbits = 0; /* index bits for lencode */
|
---|
| 1043 | this.distbits = 0; /* index bits for distcode */
|
---|
| 1044 |
|
---|
| 1045 | /* dynamic table building */
|
---|
| 1046 | this.ncode = 0; /* number of code length code lengths */
|
---|
| 1047 | this.nlen = 0; /* number of length code lengths */
|
---|
| 1048 | this.ndist = 0; /* number of distance code lengths */
|
---|
| 1049 | this.have = 0; /* number of code lengths in lens[] */
|
---|
| 1050 | this.next = null; /* next available space in codes[] */
|
---|
| 1051 |
|
---|
| 1052 | this.lens = new utils.Buf16(320); /* temporary storage for code lengths */
|
---|
| 1053 | this.work = new utils.Buf16(288); /* work area for code table building */
|
---|
| 1054 |
|
---|
| 1055 | /*
|
---|
| 1056 | because we don't have pointers in js, we use lencode and distcode directly
|
---|
| 1057 | as buffers so we don't need codes
|
---|
| 1058 | */
|
---|
| 1059 | //this.codes = new utils.Buf32(ENOUGH); /* space for code tables */
|
---|
| 1060 | this.lendyn = null; /* dynamic table for length/literal codes (JS specific) */
|
---|
| 1061 | this.distdyn = null; /* dynamic table for distance codes (JS specific) */
|
---|
| 1062 | this.sane = 0; /* if false, allow invalid distance too far */
|
---|
| 1063 | this.back = 0; /* bits back of last unprocessed length/lit */
|
---|
| 1064 | this.was = 0; /* initial length of match */
|
---|
| 1065 | }
|
---|
| 1066 |
|
---|
| 1067 | function inflateResetKeep(strm) {
|
---|
| 1068 | var state;
|
---|
| 1069 |
|
---|
| 1070 | if (!strm || !strm.state) { return Z_STREAM_ERROR; }
|
---|
| 1071 | state = strm.state;
|
---|
| 1072 | strm.total_in = strm.total_out = state.total = 0;
|
---|
| 1073 | strm.msg = ''; /*Z_NULL*/
|
---|
| 1074 | if (state.wrap) { /* to support ill-conceived Java test suite */
|
---|
| 1075 | strm.adler = state.wrap & 1;
|
---|
| 1076 | }
|
---|
| 1077 | state.mode = HEAD;
|
---|
| 1078 | state.last = 0;
|
---|
| 1079 | state.havedict = 0;
|
---|
| 1080 | state.dmax = 32768;
|
---|
| 1081 | state.head = null/*Z_NULL*/;
|
---|
| 1082 | state.hold = 0;
|
---|
| 1083 | state.bits = 0;
|
---|
| 1084 | //state.lencode = state.distcode = state.next = state.codes;
|
---|
| 1085 | state.lencode = state.lendyn = new utils.Buf32(ENOUGH_LENS);
|
---|
| 1086 | state.distcode = state.distdyn = new utils.Buf32(ENOUGH_DISTS);
|
---|
| 1087 |
|
---|
| 1088 | state.sane = 1;
|
---|
| 1089 | state.back = -1;
|
---|
| 1090 | //Tracev((stderr, "inflate: reset\n"));
|
---|
| 1091 | return Z_OK;
|
---|
| 1092 | }
|
---|
| 1093 |
|
---|
| 1094 | function inflateReset(strm) {
|
---|
| 1095 | var state;
|
---|
| 1096 |
|
---|
| 1097 | if (!strm || !strm.state) { return Z_STREAM_ERROR; }
|
---|
| 1098 | state = strm.state;
|
---|
| 1099 | state.wsize = 0;
|
---|
| 1100 | state.whave = 0;
|
---|
| 1101 | state.wnext = 0;
|
---|
| 1102 | return inflateResetKeep(strm);
|
---|
| 1103 |
|
---|
| 1104 | }
|
---|
| 1105 |
|
---|
| 1106 | function inflateReset2(strm, windowBits) {
|
---|
| 1107 | var wrap;
|
---|
| 1108 | var state;
|
---|
| 1109 |
|
---|
| 1110 | /* get the state */
|
---|
| 1111 | if (!strm || !strm.state) { return Z_STREAM_ERROR; }
|
---|
| 1112 | state = strm.state;
|
---|
| 1113 |
|
---|
| 1114 | /* extract wrap request from windowBits parameter */
|
---|
| 1115 | if (windowBits < 0) {
|
---|
| 1116 | wrap = 0;
|
---|
| 1117 | windowBits = -windowBits;
|
---|
| 1118 | }
|
---|
| 1119 | else {
|
---|
| 1120 | wrap = (windowBits >> 4) + 1;
|
---|
| 1121 | if (windowBits < 48) {
|
---|
| 1122 | windowBits &= 15;
|
---|
| 1123 | }
|
---|
| 1124 | }
|
---|
| 1125 |
|
---|
| 1126 | /* set number of window bits, free window if different */
|
---|
| 1127 | if (windowBits && (windowBits < 8 || windowBits > 15)) {
|
---|
| 1128 | return Z_STREAM_ERROR;
|
---|
| 1129 | }
|
---|
| 1130 | if (state.window !== null && state.wbits !== windowBits) {
|
---|
| 1131 | state.window = null;
|
---|
| 1132 | }
|
---|
| 1133 |
|
---|
| 1134 | /* update state and reset the rest of it */
|
---|
| 1135 | state.wrap = wrap;
|
---|
| 1136 | state.wbits = windowBits;
|
---|
| 1137 | return inflateReset(strm);
|
---|
| 1138 | }
|
---|
| 1139 |
|
---|
| 1140 | function inflateInit2(strm, windowBits) {
|
---|
| 1141 | var ret;
|
---|
| 1142 | var state;
|
---|
| 1143 |
|
---|
| 1144 | if (!strm) { return Z_STREAM_ERROR; }
|
---|
| 1145 | //strm.msg = Z_NULL; /* in case we return an error */
|
---|
| 1146 |
|
---|
| 1147 | state = new InflateState();
|
---|
| 1148 |
|
---|
| 1149 | //if (state === Z_NULL) return Z_MEM_ERROR;
|
---|
| 1150 | //Tracev((stderr, "inflate: allocated\n"));
|
---|
| 1151 | strm.state = state;
|
---|
| 1152 | state.window = null/*Z_NULL*/;
|
---|
| 1153 | ret = inflateReset2(strm, windowBits);
|
---|
| 1154 | if (ret !== Z_OK) {
|
---|
| 1155 | strm.state = null/*Z_NULL*/;
|
---|
| 1156 | }
|
---|
| 1157 | return ret;
|
---|
| 1158 | }
|
---|
| 1159 |
|
---|
| 1160 | function inflateInit(strm) {
|
---|
| 1161 | return inflateInit2(strm, DEF_WBITS);
|
---|
| 1162 | }
|
---|
| 1163 |
|
---|
| 1164 |
|
---|
| 1165 | /*
|
---|
| 1166 | Return state with length and distance decoding tables and index sizes set to
|
---|
| 1167 | fixed code decoding. Normally this returns fixed tables from inffixed.h.
|
---|
| 1168 | If BUILDFIXED is defined, then instead this routine builds the tables the
|
---|
| 1169 | first time it's called, and returns those tables the first time and
|
---|
| 1170 | thereafter. This reduces the size of the code by about 2K bytes, in
|
---|
| 1171 | exchange for a little execution time. However, BUILDFIXED should not be
|
---|
| 1172 | used for threaded applications, since the rewriting of the tables and virgin
|
---|
| 1173 | may not be thread-safe.
|
---|
| 1174 | */
|
---|
| 1175 | var virgin = true;
|
---|
| 1176 |
|
---|
| 1177 | var lenfix, distfix; // We have no pointers in JS, so keep tables separate
|
---|
| 1178 |
|
---|
| 1179 | function fixedtables(state) {
|
---|
| 1180 | /* build fixed huffman tables if first call (may not be thread safe) */
|
---|
| 1181 | if (virgin) {
|
---|
| 1182 | var sym;
|
---|
| 1183 |
|
---|
| 1184 | lenfix = new utils.Buf32(512);
|
---|
| 1185 | distfix = new utils.Buf32(32);
|
---|
| 1186 |
|
---|
| 1187 | /* literal/length table */
|
---|
| 1188 | sym = 0;
|
---|
| 1189 | while (sym < 144) { state.lens[sym++] = 8; }
|
---|
| 1190 | while (sym < 256) { state.lens[sym++] = 9; }
|
---|
| 1191 | while (sym < 280) { state.lens[sym++] = 7; }
|
---|
| 1192 | while (sym < 288) { state.lens[sym++] = 8; }
|
---|
| 1193 |
|
---|
| 1194 | inflate_table(LENS, state.lens, 0, 288, lenfix, 0, state.work, { bits: 9 });
|
---|
| 1195 |
|
---|
| 1196 | /* distance table */
|
---|
| 1197 | sym = 0;
|
---|
| 1198 | while (sym < 32) { state.lens[sym++] = 5; }
|
---|
| 1199 |
|
---|
| 1200 | inflate_table(DISTS, state.lens, 0, 32, distfix, 0, state.work, { bits: 5 });
|
---|
| 1201 |
|
---|
| 1202 | /* do this just once */
|
---|
| 1203 | virgin = false;
|
---|
| 1204 | }
|
---|
| 1205 |
|
---|
| 1206 | state.lencode = lenfix;
|
---|
| 1207 | state.lenbits = 9;
|
---|
| 1208 | state.distcode = distfix;
|
---|
| 1209 | state.distbits = 5;
|
---|
| 1210 | }
|
---|
| 1211 |
|
---|
| 1212 |
|
---|
| 1213 | /*
|
---|
| 1214 | Update the window with the last wsize (normally 32K) bytes written before
|
---|
| 1215 | returning. If window does not exist yet, create it. This is only called
|
---|
| 1216 | when a window is already in use, or when output has been written during this
|
---|
| 1217 | inflate call, but the end of the deflate stream has not been reached yet.
|
---|
| 1218 | It is also called to create a window for dictionary data when a dictionary
|
---|
| 1219 | is loaded.
|
---|
| 1220 |
|
---|
| 1221 | Providing output buffers larger than 32K to inflate() should provide a speed
|
---|
| 1222 | advantage, since only the last 32K of output is copied to the sliding window
|
---|
| 1223 | upon return from inflate(), and since all distances after the first 32K of
|
---|
| 1224 | output will fall in the output data, making match copies simpler and faster.
|
---|
| 1225 | The advantage may be dependent on the size of the processor's data caches.
|
---|
| 1226 | */
|
---|
| 1227 | function updatewindow(strm, src, end, copy) {
|
---|
| 1228 | var dist;
|
---|
| 1229 | var state = strm.state;
|
---|
| 1230 |
|
---|
| 1231 | /* if it hasn't been done already, allocate space for the window */
|
---|
| 1232 | if (state.window === null) {
|
---|
| 1233 | state.wsize = 1 << state.wbits;
|
---|
| 1234 | state.wnext = 0;
|
---|
| 1235 | state.whave = 0;
|
---|
| 1236 |
|
---|
| 1237 | state.window = new utils.Buf8(state.wsize);
|
---|
| 1238 | }
|
---|
| 1239 |
|
---|
| 1240 | /* copy state->wsize or less output bytes into the circular window */
|
---|
| 1241 | if (copy >= state.wsize) {
|
---|
| 1242 | utils.arraySet(state.window, src, end - state.wsize, state.wsize, 0);
|
---|
| 1243 | state.wnext = 0;
|
---|
| 1244 | state.whave = state.wsize;
|
---|
| 1245 | }
|
---|
| 1246 | else {
|
---|
| 1247 | dist = state.wsize - state.wnext;
|
---|
| 1248 | if (dist > copy) {
|
---|
| 1249 | dist = copy;
|
---|
| 1250 | }
|
---|
| 1251 | //zmemcpy(state->window + state->wnext, end - copy, dist);
|
---|
| 1252 | utils.arraySet(state.window, src, end - copy, dist, state.wnext);
|
---|
| 1253 | copy -= dist;
|
---|
| 1254 | if (copy) {
|
---|
| 1255 | //zmemcpy(state->window, end - copy, copy);
|
---|
| 1256 | utils.arraySet(state.window, src, end - copy, copy, 0);
|
---|
| 1257 | state.wnext = copy;
|
---|
| 1258 | state.whave = state.wsize;
|
---|
| 1259 | }
|
---|
| 1260 | else {
|
---|
| 1261 | state.wnext += dist;
|
---|
| 1262 | if (state.wnext === state.wsize) { state.wnext = 0; }
|
---|
| 1263 | if (state.whave < state.wsize) { state.whave += dist; }
|
---|
| 1264 | }
|
---|
| 1265 | }
|
---|
| 1266 | return 0;
|
---|
| 1267 | }
|
---|
| 1268 |
|
---|
| 1269 | function inflate(strm, flush) {
|
---|
| 1270 | var state;
|
---|
| 1271 | var input, output; // input/output buffers
|
---|
| 1272 | var next; /* next input INDEX */
|
---|
| 1273 | var put; /* next output INDEX */
|
---|
| 1274 | var have, left; /* available input and output */
|
---|
| 1275 | var hold; /* bit buffer */
|
---|
| 1276 | var bits; /* bits in bit buffer */
|
---|
| 1277 | var _in, _out; /* save starting available input and output */
|
---|
| 1278 | var copy; /* number of stored or match bytes to copy */
|
---|
| 1279 | var from; /* where to copy match bytes from */
|
---|
| 1280 | var from_source;
|
---|
| 1281 | var here = 0; /* current decoding table entry */
|
---|
| 1282 | var here_bits, here_op, here_val; // paked "here" denormalized (JS specific)
|
---|
| 1283 | //var last; /* parent table entry */
|
---|
| 1284 | var last_bits, last_op, last_val; // paked "last" denormalized (JS specific)
|
---|
| 1285 | var len; /* length to copy for repeats, bits to drop */
|
---|
| 1286 | var ret; /* return code */
|
---|
| 1287 | var hbuf = new utils.Buf8(4); /* buffer for gzip header crc calculation */
|
---|
| 1288 | var opts;
|
---|
| 1289 |
|
---|
| 1290 | var n; // temporary var for NEED_BITS
|
---|
| 1291 |
|
---|
| 1292 | var order = /* permutation of code lengths */
|
---|
| 1293 | [ 16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15 ];
|
---|
| 1294 |
|
---|
| 1295 |
|
---|
| 1296 | if (!strm || !strm.state || !strm.output ||
|
---|
| 1297 | (!strm.input && strm.avail_in !== 0)) {
|
---|
| 1298 | return Z_STREAM_ERROR;
|
---|
| 1299 | }
|
---|
| 1300 |
|
---|
| 1301 | state = strm.state;
|
---|
| 1302 | if (state.mode === TYPE) { state.mode = TYPEDO; } /* skip check */
|
---|
| 1303 |
|
---|
| 1304 |
|
---|
| 1305 | //--- LOAD() ---
|
---|
| 1306 | put = strm.next_out;
|
---|
| 1307 | output = strm.output;
|
---|
| 1308 | left = strm.avail_out;
|
---|
| 1309 | next = strm.next_in;
|
---|
| 1310 | input = strm.input;
|
---|
| 1311 | have = strm.avail_in;
|
---|
| 1312 | hold = state.hold;
|
---|
| 1313 | bits = state.bits;
|
---|
| 1314 | //---
|
---|
| 1315 |
|
---|
| 1316 | _in = have;
|
---|
| 1317 | _out = left;
|
---|
| 1318 | ret = Z_OK;
|
---|
| 1319 |
|
---|
| 1320 | inf_leave: // goto emulation
|
---|
| 1321 | for (;;) {
|
---|
| 1322 | switch (state.mode) {
|
---|
| 1323 | case HEAD:
|
---|
| 1324 | if (state.wrap === 0) {
|
---|
| 1325 | state.mode = TYPEDO;
|
---|
| 1326 | break;
|
---|
| 1327 | }
|
---|
| 1328 | //=== NEEDBITS(16);
|
---|
| 1329 | while (bits < 16) {
|
---|
| 1330 | if (have === 0) { break inf_leave; }
|
---|
| 1331 | have--;
|
---|
| 1332 | hold += input[next++] << bits;
|
---|
| 1333 | bits += 8;
|
---|
| 1334 | }
|
---|
| 1335 | //===//
|
---|
| 1336 | if ((state.wrap & 2) && hold === 0x8b1f) { /* gzip header */
|
---|
| 1337 | state.check = 0/*crc32(0L, Z_NULL, 0)*/;
|
---|
| 1338 | //=== CRC2(state.check, hold);
|
---|
| 1339 | hbuf[0] = hold & 0xff;
|
---|
| 1340 | hbuf[1] = (hold >>> 8) & 0xff;
|
---|
| 1341 | state.check = crc32(state.check, hbuf, 2, 0);
|
---|
| 1342 | //===//
|
---|
| 1343 |
|
---|
| 1344 | //=== INITBITS();
|
---|
| 1345 | hold = 0;
|
---|
| 1346 | bits = 0;
|
---|
| 1347 | //===//
|
---|
| 1348 | state.mode = FLAGS;
|
---|
| 1349 | break;
|
---|
| 1350 | }
|
---|
| 1351 | state.flags = 0; /* expect zlib header */
|
---|
| 1352 | if (state.head) {
|
---|
| 1353 | state.head.done = false;
|
---|
| 1354 | }
|
---|
| 1355 | if (!(state.wrap & 1) || /* check if zlib header allowed */
|
---|
| 1356 | (((hold & 0xff)/*BITS(8)*/ << 8) + (hold >> 8)) % 31) {
|
---|
| 1357 | strm.msg = 'incorrect header check';
|
---|
| 1358 | state.mode = BAD;
|
---|
| 1359 | break;
|
---|
| 1360 | }
|
---|
| 1361 | if ((hold & 0x0f)/*BITS(4)*/ !== Z_DEFLATED) {
|
---|
| 1362 | strm.msg = 'unknown compression method';
|
---|
| 1363 | state.mode = BAD;
|
---|
| 1364 | break;
|
---|
| 1365 | }
|
---|
| 1366 | //--- DROPBITS(4) ---//
|
---|
| 1367 | hold >>>= 4;
|
---|
| 1368 | bits -= 4;
|
---|
| 1369 | //---//
|
---|
| 1370 | len = (hold & 0x0f)/*BITS(4)*/ + 8;
|
---|
| 1371 | if (state.wbits === 0) {
|
---|
| 1372 | state.wbits = len;
|
---|
| 1373 | }
|
---|
| 1374 | else if (len > state.wbits) {
|
---|
| 1375 | strm.msg = 'invalid window size';
|
---|
| 1376 | state.mode = BAD;
|
---|
| 1377 | break;
|
---|
| 1378 | }
|
---|
| 1379 | state.dmax = 1 << len;
|
---|
| 1380 | //Tracev((stderr, "inflate: zlib header ok\n"));
|
---|
| 1381 | strm.adler = state.check = 1/*adler32(0L, Z_NULL, 0)*/;
|
---|
| 1382 | state.mode = hold & 0x200 ? DICTID : TYPE;
|
---|
| 1383 | //=== INITBITS();
|
---|
| 1384 | hold = 0;
|
---|
| 1385 | bits = 0;
|
---|
| 1386 | //===//
|
---|
| 1387 | break;
|
---|
| 1388 | case FLAGS:
|
---|
| 1389 | //=== NEEDBITS(16); */
|
---|
| 1390 | while (bits < 16) {
|
---|
| 1391 | if (have === 0) { break inf_leave; }
|
---|
| 1392 | have--;
|
---|
| 1393 | hold += input[next++] << bits;
|
---|
| 1394 | bits += 8;
|
---|
| 1395 | }
|
---|
| 1396 | //===//
|
---|
| 1397 | state.flags = hold;
|
---|
| 1398 | if ((state.flags & 0xff) !== Z_DEFLATED) {
|
---|
| 1399 | strm.msg = 'unknown compression method';
|
---|
| 1400 | state.mode = BAD;
|
---|
| 1401 | break;
|
---|
| 1402 | }
|
---|
| 1403 | if (state.flags & 0xe000) {
|
---|
| 1404 | strm.msg = 'unknown header flags set';
|
---|
| 1405 | state.mode = BAD;
|
---|
| 1406 | break;
|
---|
| 1407 | }
|
---|
| 1408 | if (state.head) {
|
---|
| 1409 | state.head.text = ((hold >> 8) & 1);
|
---|
| 1410 | }
|
---|
| 1411 | if (state.flags & 0x0200) {
|
---|
| 1412 | //=== CRC2(state.check, hold);
|
---|
| 1413 | hbuf[0] = hold & 0xff;
|
---|
| 1414 | hbuf[1] = (hold >>> 8) & 0xff;
|
---|
| 1415 | state.check = crc32(state.check, hbuf, 2, 0);
|
---|
| 1416 | //===//
|
---|
| 1417 | }
|
---|
| 1418 | //=== INITBITS();
|
---|
| 1419 | hold = 0;
|
---|
| 1420 | bits = 0;
|
---|
| 1421 | //===//
|
---|
| 1422 | state.mode = TIME;
|
---|
| 1423 | /* falls through */
|
---|
| 1424 | case TIME:
|
---|
| 1425 | //=== NEEDBITS(32); */
|
---|
| 1426 | while (bits < 32) {
|
---|
| 1427 | if (have === 0) { break inf_leave; }
|
---|
| 1428 | have--;
|
---|
| 1429 | hold += input[next++] << bits;
|
---|
| 1430 | bits += 8;
|
---|
| 1431 | }
|
---|
| 1432 | //===//
|
---|
| 1433 | if (state.head) {
|
---|
| 1434 | state.head.time = hold;
|
---|
| 1435 | }
|
---|
| 1436 | if (state.flags & 0x0200) {
|
---|
| 1437 | //=== CRC4(state.check, hold)
|
---|
| 1438 | hbuf[0] = hold & 0xff;
|
---|
| 1439 | hbuf[1] = (hold >>> 8) & 0xff;
|
---|
| 1440 | hbuf[2] = (hold >>> 16) & 0xff;
|
---|
| 1441 | hbuf[3] = (hold >>> 24) & 0xff;
|
---|
| 1442 | state.check = crc32(state.check, hbuf, 4, 0);
|
---|
| 1443 | //===
|
---|
| 1444 | }
|
---|
| 1445 | //=== INITBITS();
|
---|
| 1446 | hold = 0;
|
---|
| 1447 | bits = 0;
|
---|
| 1448 | //===//
|
---|
| 1449 | state.mode = OS;
|
---|
| 1450 | /* falls through */
|
---|
| 1451 | case OS:
|
---|
| 1452 | //=== NEEDBITS(16); */
|
---|
| 1453 | while (bits < 16) {
|
---|
| 1454 | if (have === 0) { break inf_leave; }
|
---|
| 1455 | have--;
|
---|
| 1456 | hold += input[next++] << bits;
|
---|
| 1457 | bits += 8;
|
---|
| 1458 | }
|
---|
| 1459 | //===//
|
---|
| 1460 | if (state.head) {
|
---|
| 1461 | state.head.xflags = (hold & 0xff);
|
---|
| 1462 | state.head.os = (hold >> 8);
|
---|
| 1463 | }
|
---|
| 1464 | if (state.flags & 0x0200) {
|
---|
| 1465 | //=== CRC2(state.check, hold);
|
---|
| 1466 | hbuf[0] = hold & 0xff;
|
---|
| 1467 | hbuf[1] = (hold >>> 8) & 0xff;
|
---|
| 1468 | state.check = crc32(state.check, hbuf, 2, 0);
|
---|
| 1469 | //===//
|
---|
| 1470 | }
|
---|
| 1471 | //=== INITBITS();
|
---|
| 1472 | hold = 0;
|
---|
| 1473 | bits = 0;
|
---|
| 1474 | //===//
|
---|
| 1475 | state.mode = EXLEN;
|
---|
| 1476 | /* falls through */
|
---|
| 1477 | case EXLEN:
|
---|
| 1478 | if (state.flags & 0x0400) {
|
---|
| 1479 | //=== NEEDBITS(16); */
|
---|
| 1480 | while (bits < 16) {
|
---|
| 1481 | if (have === 0) { break inf_leave; }
|
---|
| 1482 | have--;
|
---|
| 1483 | hold += input[next++] << bits;
|
---|
| 1484 | bits += 8;
|
---|
| 1485 | }
|
---|
| 1486 | //===//
|
---|
| 1487 | state.length = hold;
|
---|
| 1488 | if (state.head) {
|
---|
| 1489 | state.head.extra_len = hold;
|
---|
| 1490 | }
|
---|
| 1491 | if (state.flags & 0x0200) {
|
---|
| 1492 | //=== CRC2(state.check, hold);
|
---|
| 1493 | hbuf[0] = hold & 0xff;
|
---|
| 1494 | hbuf[1] = (hold >>> 8) & 0xff;
|
---|
| 1495 | state.check = crc32(state.check, hbuf, 2, 0);
|
---|
| 1496 | //===//
|
---|
| 1497 | }
|
---|
| 1498 | //=== INITBITS();
|
---|
| 1499 | hold = 0;
|
---|
| 1500 | bits = 0;
|
---|
| 1501 | //===//
|
---|
| 1502 | }
|
---|
| 1503 | else if (state.head) {
|
---|
| 1504 | state.head.extra = null/*Z_NULL*/;
|
---|
| 1505 | }
|
---|
| 1506 | state.mode = EXTRA;
|
---|
| 1507 | /* falls through */
|
---|
| 1508 | case EXTRA:
|
---|
| 1509 | if (state.flags & 0x0400) {
|
---|
| 1510 | copy = state.length;
|
---|
| 1511 | if (copy > have) { copy = have; }
|
---|
| 1512 | if (copy) {
|
---|
| 1513 | if (state.head) {
|
---|
| 1514 | len = state.head.extra_len - state.length;
|
---|
| 1515 | if (!state.head.extra) {
|
---|
| 1516 | // Use untyped array for more convenient processing later
|
---|
| 1517 | state.head.extra = new Array(state.head.extra_len);
|
---|
| 1518 | }
|
---|
| 1519 | utils.arraySet(
|
---|
| 1520 | state.head.extra,
|
---|
| 1521 | input,
|
---|
| 1522 | next,
|
---|
| 1523 | // extra field is limited to 65536 bytes
|
---|
| 1524 | // - no need for additional size check
|
---|
| 1525 | copy,
|
---|
| 1526 | /*len + copy > state.head.extra_max - len ? state.head.extra_max : copy,*/
|
---|
| 1527 | len
|
---|
| 1528 | );
|
---|
| 1529 | //zmemcpy(state.head.extra + len, next,
|
---|
| 1530 | // len + copy > state.head.extra_max ?
|
---|
| 1531 | // state.head.extra_max - len : copy);
|
---|
| 1532 | }
|
---|
| 1533 | if (state.flags & 0x0200) {
|
---|
| 1534 | state.check = crc32(state.check, input, copy, next);
|
---|
| 1535 | }
|
---|
| 1536 | have -= copy;
|
---|
| 1537 | next += copy;
|
---|
| 1538 | state.length -= copy;
|
---|
| 1539 | }
|
---|
| 1540 | if (state.length) { break inf_leave; }
|
---|
| 1541 | }
|
---|
| 1542 | state.length = 0;
|
---|
| 1543 | state.mode = NAME;
|
---|
| 1544 | /* falls through */
|
---|
| 1545 | case NAME:
|
---|
| 1546 | if (state.flags & 0x0800) {
|
---|
| 1547 | if (have === 0) { break inf_leave; }
|
---|
| 1548 | copy = 0;
|
---|
| 1549 | do {
|
---|
| 1550 | // TODO: 2 or 1 bytes?
|
---|
| 1551 | len = input[next + copy++];
|
---|
| 1552 | /* use constant limit because in js we should not preallocate memory */
|
---|
| 1553 | if (state.head && len &&
|
---|
| 1554 | (state.length < 65536 /*state.head.name_max*/)) {
|
---|
| 1555 | state.head.name += String.fromCharCode(len);
|
---|
| 1556 | }
|
---|
| 1557 | } while (len && copy < have);
|
---|
| 1558 |
|
---|
| 1559 | if (state.flags & 0x0200) {
|
---|
| 1560 | state.check = crc32(state.check, input, copy, next);
|
---|
| 1561 | }
|
---|
| 1562 | have -= copy;
|
---|
| 1563 | next += copy;
|
---|
| 1564 | if (len) { break inf_leave; }
|
---|
| 1565 | }
|
---|
| 1566 | else if (state.head) {
|
---|
| 1567 | state.head.name = null;
|
---|
| 1568 | }
|
---|
| 1569 | state.length = 0;
|
---|
| 1570 | state.mode = COMMENT;
|
---|
| 1571 | /* falls through */
|
---|
| 1572 | case COMMENT:
|
---|
| 1573 | if (state.flags & 0x1000) {
|
---|
| 1574 | if (have === 0) { break inf_leave; }
|
---|
| 1575 | copy = 0;
|
---|
| 1576 | do {
|
---|
| 1577 | len = input[next + copy++];
|
---|
| 1578 | /* use constant limit because in js we should not preallocate memory */
|
---|
| 1579 | if (state.head && len &&
|
---|
| 1580 | (state.length < 65536 /*state.head.comm_max*/)) {
|
---|
| 1581 | state.head.comment += String.fromCharCode(len);
|
---|
| 1582 | }
|
---|
| 1583 | } while (len && copy < have);
|
---|
| 1584 | if (state.flags & 0x0200) {
|
---|
| 1585 | state.check = crc32(state.check, input, copy, next);
|
---|
| 1586 | }
|
---|
| 1587 | have -= copy;
|
---|
| 1588 | next += copy;
|
---|
| 1589 | if (len) { break inf_leave; }
|
---|
| 1590 | }
|
---|
| 1591 | else if (state.head) {
|
---|
| 1592 | state.head.comment = null;
|
---|
| 1593 | }
|
---|
| 1594 | state.mode = HCRC;
|
---|
| 1595 | /* falls through */
|
---|
| 1596 | case HCRC:
|
---|
| 1597 | if (state.flags & 0x0200) {
|
---|
| 1598 | //=== NEEDBITS(16); */
|
---|
| 1599 | while (bits < 16) {
|
---|
| 1600 | if (have === 0) { break inf_leave; }
|
---|
| 1601 | have--;
|
---|
| 1602 | hold += input[next++] << bits;
|
---|
| 1603 | bits += 8;
|
---|
| 1604 | }
|
---|
| 1605 | //===//
|
---|
| 1606 | if (hold !== (state.check & 0xffff)) {
|
---|
| 1607 | strm.msg = 'header crc mismatch';
|
---|
| 1608 | state.mode = BAD;
|
---|
| 1609 | break;
|
---|
| 1610 | }
|
---|
| 1611 | //=== INITBITS();
|
---|
| 1612 | hold = 0;
|
---|
| 1613 | bits = 0;
|
---|
| 1614 | //===//
|
---|
| 1615 | }
|
---|
| 1616 | if (state.head) {
|
---|
| 1617 | state.head.hcrc = ((state.flags >> 9) & 1);
|
---|
| 1618 | state.head.done = true;
|
---|
| 1619 | }
|
---|
| 1620 | strm.adler = state.check = 0;
|
---|
| 1621 | state.mode = TYPE;
|
---|
| 1622 | break;
|
---|
| 1623 | case DICTID:
|
---|
| 1624 | //=== NEEDBITS(32); */
|
---|
| 1625 | while (bits < 32) {
|
---|
| 1626 | if (have === 0) { break inf_leave; }
|
---|
| 1627 | have--;
|
---|
| 1628 | hold += input[next++] << bits;
|
---|
| 1629 | bits += 8;
|
---|
| 1630 | }
|
---|
| 1631 | //===//
|
---|
| 1632 | strm.adler = state.check = zswap32(hold);
|
---|
| 1633 | //=== INITBITS();
|
---|
| 1634 | hold = 0;
|
---|
| 1635 | bits = 0;
|
---|
| 1636 | //===//
|
---|
| 1637 | state.mode = DICT;
|
---|
| 1638 | /* falls through */
|
---|
| 1639 | case DICT:
|
---|
| 1640 | if (state.havedict === 0) {
|
---|
| 1641 | //--- RESTORE() ---
|
---|
| 1642 | strm.next_out = put;
|
---|
| 1643 | strm.avail_out = left;
|
---|
| 1644 | strm.next_in = next;
|
---|
| 1645 | strm.avail_in = have;
|
---|
| 1646 | state.hold = hold;
|
---|
| 1647 | state.bits = bits;
|
---|
| 1648 | //---
|
---|
| 1649 | return Z_NEED_DICT;
|
---|
| 1650 | }
|
---|
| 1651 | strm.adler = state.check = 1/*adler32(0L, Z_NULL, 0)*/;
|
---|
| 1652 | state.mode = TYPE;
|
---|
| 1653 | /* falls through */
|
---|
| 1654 | case TYPE:
|
---|
| 1655 | if (flush === Z_BLOCK || flush === Z_TREES) { break inf_leave; }
|
---|
| 1656 | /* falls through */
|
---|
| 1657 | case TYPEDO:
|
---|
| 1658 | if (state.last) {
|
---|
| 1659 | //--- BYTEBITS() ---//
|
---|
| 1660 | hold >>>= bits & 7;
|
---|
| 1661 | bits -= bits & 7;
|
---|
| 1662 | //---//
|
---|
| 1663 | state.mode = CHECK;
|
---|
| 1664 | break;
|
---|
| 1665 | }
|
---|
| 1666 | //=== NEEDBITS(3); */
|
---|
| 1667 | while (bits < 3) {
|
---|
| 1668 | if (have === 0) { break inf_leave; }
|
---|
| 1669 | have--;
|
---|
| 1670 | hold += input[next++] << bits;
|
---|
| 1671 | bits += 8;
|
---|
| 1672 | }
|
---|
| 1673 | //===//
|
---|
| 1674 | state.last = (hold & 0x01)/*BITS(1)*/;
|
---|
| 1675 | //--- DROPBITS(1) ---//
|
---|
| 1676 | hold >>>= 1;
|
---|
| 1677 | bits -= 1;
|
---|
| 1678 | //---//
|
---|
| 1679 |
|
---|
| 1680 | switch ((hold & 0x03)/*BITS(2)*/) {
|
---|
| 1681 | case 0: /* stored block */
|
---|
| 1682 | //Tracev((stderr, "inflate: stored block%s\n",
|
---|
| 1683 | // state.last ? " (last)" : ""));
|
---|
| 1684 | state.mode = STORED;
|
---|
| 1685 | break;
|
---|
| 1686 | case 1: /* fixed block */
|
---|
| 1687 | fixedtables(state);
|
---|
| 1688 | //Tracev((stderr, "inflate: fixed codes block%s\n",
|
---|
| 1689 | // state.last ? " (last)" : ""));
|
---|
| 1690 | state.mode = LEN_; /* decode codes */
|
---|
| 1691 | if (flush === Z_TREES) {
|
---|
| 1692 | //--- DROPBITS(2) ---//
|
---|
| 1693 | hold >>>= 2;
|
---|
| 1694 | bits -= 2;
|
---|
| 1695 | //---//
|
---|
| 1696 | break inf_leave;
|
---|
| 1697 | }
|
---|
| 1698 | break;
|
---|
| 1699 | case 2: /* dynamic block */
|
---|
| 1700 | //Tracev((stderr, "inflate: dynamic codes block%s\n",
|
---|
| 1701 | // state.last ? " (last)" : ""));
|
---|
| 1702 | state.mode = TABLE;
|
---|
| 1703 | break;
|
---|
| 1704 | case 3:
|
---|
| 1705 | strm.msg = 'invalid block type';
|
---|
| 1706 | state.mode = BAD;
|
---|
| 1707 | }
|
---|
| 1708 | //--- DROPBITS(2) ---//
|
---|
| 1709 | hold >>>= 2;
|
---|
| 1710 | bits -= 2;
|
---|
| 1711 | //---//
|
---|
| 1712 | break;
|
---|
| 1713 | case STORED:
|
---|
| 1714 | //--- BYTEBITS() ---// /* go to byte boundary */
|
---|
| 1715 | hold >>>= bits & 7;
|
---|
| 1716 | bits -= bits & 7;
|
---|
| 1717 | //---//
|
---|
| 1718 | //=== NEEDBITS(32); */
|
---|
| 1719 | while (bits < 32) {
|
---|
| 1720 | if (have === 0) { break inf_leave; }
|
---|
| 1721 | have--;
|
---|
| 1722 | hold += input[next++] << bits;
|
---|
| 1723 | bits += 8;
|
---|
| 1724 | }
|
---|
| 1725 | //===//
|
---|
| 1726 | if ((hold & 0xffff) !== ((hold >>> 16) ^ 0xffff)) {
|
---|
| 1727 | strm.msg = 'invalid stored block lengths';
|
---|
| 1728 | state.mode = BAD;
|
---|
| 1729 | break;
|
---|
| 1730 | }
|
---|
| 1731 | state.length = hold & 0xffff;
|
---|
| 1732 | //Tracev((stderr, "inflate: stored length %u\n",
|
---|
| 1733 | // state.length));
|
---|
| 1734 | //=== INITBITS();
|
---|
| 1735 | hold = 0;
|
---|
| 1736 | bits = 0;
|
---|
| 1737 | //===//
|
---|
| 1738 | state.mode = COPY_;
|
---|
| 1739 | if (flush === Z_TREES) { break inf_leave; }
|
---|
| 1740 | /* falls through */
|
---|
| 1741 | case COPY_:
|
---|
| 1742 | state.mode = COPY;
|
---|
| 1743 | /* falls through */
|
---|
| 1744 | case COPY:
|
---|
| 1745 | copy = state.length;
|
---|
| 1746 | if (copy) {
|
---|
| 1747 | if (copy > have) { copy = have; }
|
---|
| 1748 | if (copy > left) { copy = left; }
|
---|
| 1749 | if (copy === 0) { break inf_leave; }
|
---|
| 1750 | //--- zmemcpy(put, next, copy); ---
|
---|
| 1751 | utils.arraySet(output, input, next, copy, put);
|
---|
| 1752 | //---//
|
---|
| 1753 | have -= copy;
|
---|
| 1754 | next += copy;
|
---|
| 1755 | left -= copy;
|
---|
| 1756 | put += copy;
|
---|
| 1757 | state.length -= copy;
|
---|
| 1758 | break;
|
---|
| 1759 | }
|
---|
| 1760 | //Tracev((stderr, "inflate: stored end\n"));
|
---|
| 1761 | state.mode = TYPE;
|
---|
| 1762 | break;
|
---|
| 1763 | case TABLE:
|
---|
| 1764 | //=== NEEDBITS(14); */
|
---|
| 1765 | while (bits < 14) {
|
---|
| 1766 | if (have === 0) { break inf_leave; }
|
---|
| 1767 | have--;
|
---|
| 1768 | hold += input[next++] << bits;
|
---|
| 1769 | bits += 8;
|
---|
| 1770 | }
|
---|
| 1771 | //===//
|
---|
| 1772 | state.nlen = (hold & 0x1f)/*BITS(5)*/ + 257;
|
---|
| 1773 | //--- DROPBITS(5) ---//
|
---|
| 1774 | hold >>>= 5;
|
---|
| 1775 | bits -= 5;
|
---|
| 1776 | //---//
|
---|
| 1777 | state.ndist = (hold & 0x1f)/*BITS(5)*/ + 1;
|
---|
| 1778 | //--- DROPBITS(5) ---//
|
---|
| 1779 | hold >>>= 5;
|
---|
| 1780 | bits -= 5;
|
---|
| 1781 | //---//
|
---|
| 1782 | state.ncode = (hold & 0x0f)/*BITS(4)*/ + 4;
|
---|
| 1783 | //--- DROPBITS(4) ---//
|
---|
| 1784 | hold >>>= 4;
|
---|
| 1785 | bits -= 4;
|
---|
| 1786 | //---//
|
---|
| 1787 | //#ifndef PKZIP_BUG_WORKAROUND
|
---|
| 1788 | if (state.nlen > 286 || state.ndist > 30) {
|
---|
| 1789 | strm.msg = 'too many length or distance symbols';
|
---|
| 1790 | state.mode = BAD;
|
---|
| 1791 | break;
|
---|
| 1792 | }
|
---|
| 1793 | //#endif
|
---|
| 1794 | //Tracev((stderr, "inflate: table sizes ok\n"));
|
---|
| 1795 | state.have = 0;
|
---|
| 1796 | state.mode = LENLENS;
|
---|
| 1797 | /* falls through */
|
---|
| 1798 | case LENLENS:
|
---|
| 1799 | while (state.have < state.ncode) {
|
---|
| 1800 | //=== NEEDBITS(3);
|
---|
| 1801 | while (bits < 3) {
|
---|
| 1802 | if (have === 0) { break inf_leave; }
|
---|
| 1803 | have--;
|
---|
| 1804 | hold += input[next++] << bits;
|
---|
| 1805 | bits += 8;
|
---|
| 1806 | }
|
---|
| 1807 | //===//
|
---|
| 1808 | state.lens[order[state.have++]] = (hold & 0x07);//BITS(3);
|
---|
| 1809 | //--- DROPBITS(3) ---//
|
---|
| 1810 | hold >>>= 3;
|
---|
| 1811 | bits -= 3;
|
---|
| 1812 | //---//
|
---|
| 1813 | }
|
---|
| 1814 | while (state.have < 19) {
|
---|
| 1815 | state.lens[order[state.have++]] = 0;
|
---|
| 1816 | }
|
---|
| 1817 | // We have separate tables & no pointers. 2 commented lines below not needed.
|
---|
| 1818 | //state.next = state.codes;
|
---|
| 1819 | //state.lencode = state.next;
|
---|
| 1820 | // Switch to use dynamic table
|
---|
| 1821 | state.lencode = state.lendyn;
|
---|
| 1822 | state.lenbits = 7;
|
---|
| 1823 |
|
---|
| 1824 | opts = { bits: state.lenbits };
|
---|
| 1825 | ret = inflate_table(CODES, state.lens, 0, 19, state.lencode, 0, state.work, opts);
|
---|
| 1826 | state.lenbits = opts.bits;
|
---|
| 1827 |
|
---|
| 1828 | if (ret) {
|
---|
| 1829 | strm.msg = 'invalid code lengths set';
|
---|
| 1830 | state.mode = BAD;
|
---|
| 1831 | break;
|
---|
| 1832 | }
|
---|
| 1833 | //Tracev((stderr, "inflate: code lengths ok\n"));
|
---|
| 1834 | state.have = 0;
|
---|
| 1835 | state.mode = CODELENS;
|
---|
| 1836 | /* falls through */
|
---|
| 1837 | case CODELENS:
|
---|
| 1838 | while (state.have < state.nlen + state.ndist) {
|
---|
| 1839 | for (;;) {
|
---|
| 1840 | here = state.lencode[hold & ((1 << state.lenbits) - 1)];/*BITS(state.lenbits)*/
|
---|
| 1841 | here_bits = here >>> 24;
|
---|
| 1842 | here_op = (here >>> 16) & 0xff;
|
---|
| 1843 | here_val = here & 0xffff;
|
---|
| 1844 |
|
---|
| 1845 | if ((here_bits) <= bits) { break; }
|
---|
| 1846 | //--- PULLBYTE() ---//
|
---|
| 1847 | if (have === 0) { break inf_leave; }
|
---|
| 1848 | have--;
|
---|
| 1849 | hold += input[next++] << bits;
|
---|
| 1850 | bits += 8;
|
---|
| 1851 | //---//
|
---|
| 1852 | }
|
---|
| 1853 | if (here_val < 16) {
|
---|
| 1854 | //--- DROPBITS(here.bits) ---//
|
---|
| 1855 | hold >>>= here_bits;
|
---|
| 1856 | bits -= here_bits;
|
---|
| 1857 | //---//
|
---|
| 1858 | state.lens[state.have++] = here_val;
|
---|
| 1859 | }
|
---|
| 1860 | else {
|
---|
| 1861 | if (here_val === 16) {
|
---|
| 1862 | //=== NEEDBITS(here.bits + 2);
|
---|
| 1863 | n = here_bits + 2;
|
---|
| 1864 | while (bits < n) {
|
---|
| 1865 | if (have === 0) { break inf_leave; }
|
---|
| 1866 | have--;
|
---|
| 1867 | hold += input[next++] << bits;
|
---|
| 1868 | bits += 8;
|
---|
| 1869 | }
|
---|
| 1870 | //===//
|
---|
| 1871 | //--- DROPBITS(here.bits) ---//
|
---|
| 1872 | hold >>>= here_bits;
|
---|
| 1873 | bits -= here_bits;
|
---|
| 1874 | //---//
|
---|
| 1875 | if (state.have === 0) {
|
---|
| 1876 | strm.msg = 'invalid bit length repeat';
|
---|
| 1877 | state.mode = BAD;
|
---|
| 1878 | break;
|
---|
| 1879 | }
|
---|
| 1880 | len = state.lens[state.have - 1];
|
---|
| 1881 | copy = 3 + (hold & 0x03);//BITS(2);
|
---|
| 1882 | //--- DROPBITS(2) ---//
|
---|
| 1883 | hold >>>= 2;
|
---|
| 1884 | bits -= 2;
|
---|
| 1885 | //---//
|
---|
| 1886 | }
|
---|
| 1887 | else if (here_val === 17) {
|
---|
| 1888 | //=== NEEDBITS(here.bits + 3);
|
---|
| 1889 | n = here_bits + 3;
|
---|
| 1890 | while (bits < n) {
|
---|
| 1891 | if (have === 0) { break inf_leave; }
|
---|
| 1892 | have--;
|
---|
| 1893 | hold += input[next++] << bits;
|
---|
| 1894 | bits += 8;
|
---|
| 1895 | }
|
---|
| 1896 | //===//
|
---|
| 1897 | //--- DROPBITS(here.bits) ---//
|
---|
| 1898 | hold >>>= here_bits;
|
---|
| 1899 | bits -= here_bits;
|
---|
| 1900 | //---//
|
---|
| 1901 | len = 0;
|
---|
| 1902 | copy = 3 + (hold & 0x07);//BITS(3);
|
---|
| 1903 | //--- DROPBITS(3) ---//
|
---|
| 1904 | hold >>>= 3;
|
---|
| 1905 | bits -= 3;
|
---|
| 1906 | //---//
|
---|
| 1907 | }
|
---|
| 1908 | else {
|
---|
| 1909 | //=== NEEDBITS(here.bits + 7);
|
---|
| 1910 | n = here_bits + 7;
|
---|
| 1911 | while (bits < n) {
|
---|
| 1912 | if (have === 0) { break inf_leave; }
|
---|
| 1913 | have--;
|
---|
| 1914 | hold += input[next++] << bits;
|
---|
| 1915 | bits += 8;
|
---|
| 1916 | }
|
---|
| 1917 | //===//
|
---|
| 1918 | //--- DROPBITS(here.bits) ---//
|
---|
| 1919 | hold >>>= here_bits;
|
---|
| 1920 | bits -= here_bits;
|
---|
| 1921 | //---//
|
---|
| 1922 | len = 0;
|
---|
| 1923 | copy = 11 + (hold & 0x7f);//BITS(7);
|
---|
| 1924 | //--- DROPBITS(7) ---//
|
---|
| 1925 | hold >>>= 7;
|
---|
| 1926 | bits -= 7;
|
---|
| 1927 | //---//
|
---|
| 1928 | }
|
---|
| 1929 | if (state.have + copy > state.nlen + state.ndist) {
|
---|
| 1930 | strm.msg = 'invalid bit length repeat';
|
---|
| 1931 | state.mode = BAD;
|
---|
| 1932 | break;
|
---|
| 1933 | }
|
---|
| 1934 | while (copy--) {
|
---|
| 1935 | state.lens[state.have++] = len;
|
---|
| 1936 | }
|
---|
| 1937 | }
|
---|
| 1938 | }
|
---|
| 1939 |
|
---|
| 1940 | /* handle error breaks in while */
|
---|
| 1941 | if (state.mode === BAD) { break; }
|
---|
| 1942 |
|
---|
| 1943 | /* check for end-of-block code (better have one) */
|
---|
| 1944 | if (state.lens[256] === 0) {
|
---|
| 1945 | strm.msg = 'invalid code -- missing end-of-block';
|
---|
| 1946 | state.mode = BAD;
|
---|
| 1947 | break;
|
---|
| 1948 | }
|
---|
| 1949 |
|
---|
| 1950 | /* build code tables -- note: do not change the lenbits or distbits
|
---|
| 1951 | values here (9 and 6) without reading the comments in inftrees.h
|
---|
| 1952 | concerning the ENOUGH constants, which depend on those values */
|
---|
| 1953 | state.lenbits = 9;
|
---|
| 1954 |
|
---|
| 1955 | opts = { bits: state.lenbits };
|
---|
| 1956 | ret = inflate_table(LENS, state.lens, 0, state.nlen, state.lencode, 0, state.work, opts);
|
---|
| 1957 | // We have separate tables & no pointers. 2 commented lines below not needed.
|
---|
| 1958 | // state.next_index = opts.table_index;
|
---|
| 1959 | state.lenbits = opts.bits;
|
---|
| 1960 | // state.lencode = state.next;
|
---|
| 1961 |
|
---|
| 1962 | if (ret) {
|
---|
| 1963 | strm.msg = 'invalid literal/lengths set';
|
---|
| 1964 | state.mode = BAD;
|
---|
| 1965 | break;
|
---|
| 1966 | }
|
---|
| 1967 |
|
---|
| 1968 | state.distbits = 6;
|
---|
| 1969 | //state.distcode.copy(state.codes);
|
---|
| 1970 | // Switch to use dynamic table
|
---|
| 1971 | state.distcode = state.distdyn;
|
---|
| 1972 | opts = { bits: state.distbits };
|
---|
| 1973 | ret = inflate_table(DISTS, state.lens, state.nlen, state.ndist, state.distcode, 0, state.work, opts);
|
---|
| 1974 | // We have separate tables & no pointers. 2 commented lines below not needed.
|
---|
| 1975 | // state.next_index = opts.table_index;
|
---|
| 1976 | state.distbits = opts.bits;
|
---|
| 1977 | // state.distcode = state.next;
|
---|
| 1978 |
|
---|
| 1979 | if (ret) {
|
---|
| 1980 | strm.msg = 'invalid distances set';
|
---|
| 1981 | state.mode = BAD;
|
---|
| 1982 | break;
|
---|
| 1983 | }
|
---|
| 1984 | //Tracev((stderr, 'inflate: codes ok\n'));
|
---|
| 1985 | state.mode = LEN_;
|
---|
| 1986 | if (flush === Z_TREES) { break inf_leave; }
|
---|
| 1987 | /* falls through */
|
---|
| 1988 | case LEN_:
|
---|
| 1989 | state.mode = LEN;
|
---|
| 1990 | /* falls through */
|
---|
| 1991 | case LEN:
|
---|
| 1992 | if (have >= 6 && left >= 258) {
|
---|
| 1993 | //--- RESTORE() ---
|
---|
| 1994 | strm.next_out = put;
|
---|
| 1995 | strm.avail_out = left;
|
---|
| 1996 | strm.next_in = next;
|
---|
| 1997 | strm.avail_in = have;
|
---|
| 1998 | state.hold = hold;
|
---|
| 1999 | state.bits = bits;
|
---|
| 2000 | //---
|
---|
| 2001 | inflate_fast(strm, _out);
|
---|
| 2002 | //--- LOAD() ---
|
---|
| 2003 | put = strm.next_out;
|
---|
| 2004 | output = strm.output;
|
---|
| 2005 | left = strm.avail_out;
|
---|
| 2006 | next = strm.next_in;
|
---|
| 2007 | input = strm.input;
|
---|
| 2008 | have = strm.avail_in;
|
---|
| 2009 | hold = state.hold;
|
---|
| 2010 | bits = state.bits;
|
---|
| 2011 | //---
|
---|
| 2012 |
|
---|
| 2013 | if (state.mode === TYPE) {
|
---|
| 2014 | state.back = -1;
|
---|
| 2015 | }
|
---|
| 2016 | break;
|
---|
| 2017 | }
|
---|
| 2018 | state.back = 0;
|
---|
| 2019 | for (;;) {
|
---|
| 2020 | here = state.lencode[hold & ((1 << state.lenbits) - 1)]; /*BITS(state.lenbits)*/
|
---|
| 2021 | here_bits = here >>> 24;
|
---|
| 2022 | here_op = (here >>> 16) & 0xff;
|
---|
| 2023 | here_val = here & 0xffff;
|
---|
| 2024 |
|
---|
| 2025 | if (here_bits <= bits) { break; }
|
---|
| 2026 | //--- PULLBYTE() ---//
|
---|
| 2027 | if (have === 0) { break inf_leave; }
|
---|
| 2028 | have--;
|
---|
| 2029 | hold += input[next++] << bits;
|
---|
| 2030 | bits += 8;
|
---|
| 2031 | //---//
|
---|
| 2032 | }
|
---|
| 2033 | if (here_op && (here_op & 0xf0) === 0) {
|
---|
| 2034 | last_bits = here_bits;
|
---|
| 2035 | last_op = here_op;
|
---|
| 2036 | last_val = here_val;
|
---|
| 2037 | for (;;) {
|
---|
| 2038 | here = state.lencode[last_val +
|
---|
| 2039 | ((hold & ((1 << (last_bits + last_op)) - 1))/*BITS(last.bits + last.op)*/ >> last_bits)];
|
---|
| 2040 | here_bits = here >>> 24;
|
---|
| 2041 | here_op = (here >>> 16) & 0xff;
|
---|
| 2042 | here_val = here & 0xffff;
|
---|
| 2043 |
|
---|
| 2044 | if ((last_bits + here_bits) <= bits) { break; }
|
---|
| 2045 | //--- PULLBYTE() ---//
|
---|
| 2046 | if (have === 0) { break inf_leave; }
|
---|
| 2047 | have--;
|
---|
| 2048 | hold += input[next++] << bits;
|
---|
| 2049 | bits += 8;
|
---|
| 2050 | //---//
|
---|
| 2051 | }
|
---|
| 2052 | //--- DROPBITS(last.bits) ---//
|
---|
| 2053 | hold >>>= last_bits;
|
---|
| 2054 | bits -= last_bits;
|
---|
| 2055 | //---//
|
---|
| 2056 | state.back += last_bits;
|
---|
| 2057 | }
|
---|
| 2058 | //--- DROPBITS(here.bits) ---//
|
---|
| 2059 | hold >>>= here_bits;
|
---|
| 2060 | bits -= here_bits;
|
---|
| 2061 | //---//
|
---|
| 2062 | state.back += here_bits;
|
---|
| 2063 | state.length = here_val;
|
---|
| 2064 | if (here_op === 0) {
|
---|
| 2065 | //Tracevv((stderr, here.val >= 0x20 && here.val < 0x7f ?
|
---|
| 2066 | // "inflate: literal '%c'\n" :
|
---|
| 2067 | // "inflate: literal 0x%02x\n", here.val));
|
---|
| 2068 | state.mode = LIT;
|
---|
| 2069 | break;
|
---|
| 2070 | }
|
---|
| 2071 | if (here_op & 32) {
|
---|
| 2072 | //Tracevv((stderr, "inflate: end of block\n"));
|
---|
| 2073 | state.back = -1;
|
---|
| 2074 | state.mode = TYPE;
|
---|
| 2075 | break;
|
---|
| 2076 | }
|
---|
| 2077 | if (here_op & 64) {
|
---|
| 2078 | strm.msg = 'invalid literal/length code';
|
---|
| 2079 | state.mode = BAD;
|
---|
| 2080 | break;
|
---|
| 2081 | }
|
---|
| 2082 | state.extra = here_op & 15;
|
---|
| 2083 | state.mode = LENEXT;
|
---|
| 2084 | /* falls through */
|
---|
| 2085 | case LENEXT:
|
---|
| 2086 | if (state.extra) {
|
---|
| 2087 | //=== NEEDBITS(state.extra);
|
---|
| 2088 | n = state.extra;
|
---|
| 2089 | while (bits < n) {
|
---|
| 2090 | if (have === 0) { break inf_leave; }
|
---|
| 2091 | have--;
|
---|
| 2092 | hold += input[next++] << bits;
|
---|
| 2093 | bits += 8;
|
---|
| 2094 | }
|
---|
| 2095 | //===//
|
---|
| 2096 | state.length += hold & ((1 << state.extra) - 1)/*BITS(state.extra)*/;
|
---|
| 2097 | //--- DROPBITS(state.extra) ---//
|
---|
| 2098 | hold >>>= state.extra;
|
---|
| 2099 | bits -= state.extra;
|
---|
| 2100 | //---//
|
---|
| 2101 | state.back += state.extra;
|
---|
| 2102 | }
|
---|
| 2103 | //Tracevv((stderr, "inflate: length %u\n", state.length));
|
---|
| 2104 | state.was = state.length;
|
---|
| 2105 | state.mode = DIST;
|
---|
| 2106 | /* falls through */
|
---|
| 2107 | case DIST:
|
---|
| 2108 | for (;;) {
|
---|
| 2109 | here = state.distcode[hold & ((1 << state.distbits) - 1)];/*BITS(state.distbits)*/
|
---|
| 2110 | here_bits = here >>> 24;
|
---|
| 2111 | here_op = (here >>> 16) & 0xff;
|
---|
| 2112 | here_val = here & 0xffff;
|
---|
| 2113 |
|
---|
| 2114 | if ((here_bits) <= bits) { break; }
|
---|
| 2115 | //--- PULLBYTE() ---//
|
---|
| 2116 | if (have === 0) { break inf_leave; }
|
---|
| 2117 | have--;
|
---|
| 2118 | hold += input[next++] << bits;
|
---|
| 2119 | bits += 8;
|
---|
| 2120 | //---//
|
---|
| 2121 | }
|
---|
| 2122 | if ((here_op & 0xf0) === 0) {
|
---|
| 2123 | last_bits = here_bits;
|
---|
| 2124 | last_op = here_op;
|
---|
| 2125 | last_val = here_val;
|
---|
| 2126 | for (;;) {
|
---|
| 2127 | here = state.distcode[last_val +
|
---|
| 2128 | ((hold & ((1 << (last_bits + last_op)) - 1))/*BITS(last.bits + last.op)*/ >> last_bits)];
|
---|
| 2129 | here_bits = here >>> 24;
|
---|
| 2130 | here_op = (here >>> 16) & 0xff;
|
---|
| 2131 | here_val = here & 0xffff;
|
---|
| 2132 |
|
---|
| 2133 | if ((last_bits + here_bits) <= bits) { break; }
|
---|
| 2134 | //--- PULLBYTE() ---//
|
---|
| 2135 | if (have === 0) { break inf_leave; }
|
---|
| 2136 | have--;
|
---|
| 2137 | hold += input[next++] << bits;
|
---|
| 2138 | bits += 8;
|
---|
| 2139 | //---//
|
---|
| 2140 | }
|
---|
| 2141 | //--- DROPBITS(last.bits) ---//
|
---|
| 2142 | hold >>>= last_bits;
|
---|
| 2143 | bits -= last_bits;
|
---|
| 2144 | //---//
|
---|
| 2145 | state.back += last_bits;
|
---|
| 2146 | }
|
---|
| 2147 | //--- DROPBITS(here.bits) ---//
|
---|
| 2148 | hold >>>= here_bits;
|
---|
| 2149 | bits -= here_bits;
|
---|
| 2150 | //---//
|
---|
| 2151 | state.back += here_bits;
|
---|
| 2152 | if (here_op & 64) {
|
---|
| 2153 | strm.msg = 'invalid distance code';
|
---|
| 2154 | state.mode = BAD;
|
---|
| 2155 | break;
|
---|
| 2156 | }
|
---|
| 2157 | state.offset = here_val;
|
---|
| 2158 | state.extra = (here_op) & 15;
|
---|
| 2159 | state.mode = DISTEXT;
|
---|
| 2160 | /* falls through */
|
---|
| 2161 | case DISTEXT:
|
---|
| 2162 | if (state.extra) {
|
---|
| 2163 | //=== NEEDBITS(state.extra);
|
---|
| 2164 | n = state.extra;
|
---|
| 2165 | while (bits < n) {
|
---|
| 2166 | if (have === 0) { break inf_leave; }
|
---|
| 2167 | have--;
|
---|
| 2168 | hold += input[next++] << bits;
|
---|
| 2169 | bits += 8;
|
---|
| 2170 | }
|
---|
| 2171 | //===//
|
---|
| 2172 | state.offset += hold & ((1 << state.extra) - 1)/*BITS(state.extra)*/;
|
---|
| 2173 | //--- DROPBITS(state.extra) ---//
|
---|
| 2174 | hold >>>= state.extra;
|
---|
| 2175 | bits -= state.extra;
|
---|
| 2176 | //---//
|
---|
| 2177 | state.back += state.extra;
|
---|
| 2178 | }
|
---|
| 2179 | //#ifdef INFLATE_STRICT
|
---|
| 2180 | if (state.offset > state.dmax) {
|
---|
| 2181 | strm.msg = 'invalid distance too far back';
|
---|
| 2182 | state.mode = BAD;
|
---|
| 2183 | break;
|
---|
| 2184 | }
|
---|
| 2185 | //#endif
|
---|
| 2186 | //Tracevv((stderr, "inflate: distance %u\n", state.offset));
|
---|
| 2187 | state.mode = MATCH;
|
---|
| 2188 | /* falls through */
|
---|
| 2189 | case MATCH:
|
---|
| 2190 | if (left === 0) { break inf_leave; }
|
---|
| 2191 | copy = _out - left;
|
---|
| 2192 | if (state.offset > copy) { /* copy from window */
|
---|
| 2193 | copy = state.offset - copy;
|
---|
| 2194 | if (copy > state.whave) {
|
---|
| 2195 | if (state.sane) {
|
---|
| 2196 | strm.msg = 'invalid distance too far back';
|
---|
| 2197 | state.mode = BAD;
|
---|
| 2198 | break;
|
---|
| 2199 | }
|
---|
| 2200 | // (!) This block is disabled in zlib defaults,
|
---|
| 2201 | // don't enable it for binary compatibility
|
---|
| 2202 | //#ifdef INFLATE_ALLOW_INVALID_DISTANCE_TOOFAR_ARRR
|
---|
| 2203 | // Trace((stderr, "inflate.c too far\n"));
|
---|
| 2204 | // copy -= state.whave;
|
---|
| 2205 | // if (copy > state.length) { copy = state.length; }
|
---|
| 2206 | // if (copy > left) { copy = left; }
|
---|
| 2207 | // left -= copy;
|
---|
| 2208 | // state.length -= copy;
|
---|
| 2209 | // do {
|
---|
| 2210 | // output[put++] = 0;
|
---|
| 2211 | // } while (--copy);
|
---|
| 2212 | // if (state.length === 0) { state.mode = LEN; }
|
---|
| 2213 | // break;
|
---|
| 2214 | //#endif
|
---|
| 2215 | }
|
---|
| 2216 | if (copy > state.wnext) {
|
---|
| 2217 | copy -= state.wnext;
|
---|
| 2218 | from = state.wsize - copy;
|
---|
| 2219 | }
|
---|
| 2220 | else {
|
---|
| 2221 | from = state.wnext - copy;
|
---|
| 2222 | }
|
---|
| 2223 | if (copy > state.length) { copy = state.length; }
|
---|
| 2224 | from_source = state.window;
|
---|
| 2225 | }
|
---|
| 2226 | else { /* copy from output */
|
---|
| 2227 | from_source = output;
|
---|
| 2228 | from = put - state.offset;
|
---|
| 2229 | copy = state.length;
|
---|
| 2230 | }
|
---|
| 2231 | if (copy > left) { copy = left; }
|
---|
| 2232 | left -= copy;
|
---|
| 2233 | state.length -= copy;
|
---|
| 2234 | do {
|
---|
| 2235 | output[put++] = from_source[from++];
|
---|
| 2236 | } while (--copy);
|
---|
| 2237 | if (state.length === 0) { state.mode = LEN; }
|
---|
| 2238 | break;
|
---|
| 2239 | case LIT:
|
---|
| 2240 | if (left === 0) { break inf_leave; }
|
---|
| 2241 | output[put++] = state.length;
|
---|
| 2242 | left--;
|
---|
| 2243 | state.mode = LEN;
|
---|
| 2244 | break;
|
---|
| 2245 | case CHECK:
|
---|
| 2246 | if (state.wrap) {
|
---|
| 2247 | //=== NEEDBITS(32);
|
---|
| 2248 | while (bits < 32) {
|
---|
| 2249 | if (have === 0) { break inf_leave; }
|
---|
| 2250 | have--;
|
---|
| 2251 | // Use '|' instead of '+' to make sure that result is signed
|
---|
| 2252 | hold |= input[next++] << bits;
|
---|
| 2253 | bits += 8;
|
---|
| 2254 | }
|
---|
| 2255 | //===//
|
---|
| 2256 | _out -= left;
|
---|
| 2257 | strm.total_out += _out;
|
---|
| 2258 | state.total += _out;
|
---|
| 2259 | if (_out) {
|
---|
| 2260 | strm.adler = state.check =
|
---|
| 2261 | /*UPDATE(state.check, put - _out, _out);*/
|
---|
| 2262 | (state.flags ? crc32(state.check, output, _out, put - _out) : adler32(state.check, output, _out, put - _out));
|
---|
| 2263 |
|
---|
| 2264 | }
|
---|
| 2265 | _out = left;
|
---|
| 2266 | // NB: crc32 stored as signed 32-bit int, zswap32 returns signed too
|
---|
| 2267 | if ((state.flags ? hold : zswap32(hold)) !== state.check) {
|
---|
| 2268 | strm.msg = 'incorrect data check';
|
---|
| 2269 | state.mode = BAD;
|
---|
| 2270 | break;
|
---|
| 2271 | }
|
---|
| 2272 | //=== INITBITS();
|
---|
| 2273 | hold = 0;
|
---|
| 2274 | bits = 0;
|
---|
| 2275 | //===//
|
---|
| 2276 | //Tracev((stderr, "inflate: check matches trailer\n"));
|
---|
| 2277 | }
|
---|
| 2278 | state.mode = LENGTH;
|
---|
| 2279 | /* falls through */
|
---|
| 2280 | case LENGTH:
|
---|
| 2281 | if (state.wrap && state.flags) {
|
---|
| 2282 | //=== NEEDBITS(32);
|
---|
| 2283 | while (bits < 32) {
|
---|
| 2284 | if (have === 0) { break inf_leave; }
|
---|
| 2285 | have--;
|
---|
| 2286 | hold += input[next++] << bits;
|
---|
| 2287 | bits += 8;
|
---|
| 2288 | }
|
---|
| 2289 | //===//
|
---|
| 2290 | if (hold !== (state.total & 0xffffffff)) {
|
---|
| 2291 | strm.msg = 'incorrect length check';
|
---|
| 2292 | state.mode = BAD;
|
---|
| 2293 | break;
|
---|
| 2294 | }
|
---|
| 2295 | //=== INITBITS();
|
---|
| 2296 | hold = 0;
|
---|
| 2297 | bits = 0;
|
---|
| 2298 | //===//
|
---|
| 2299 | //Tracev((stderr, "inflate: length matches trailer\n"));
|
---|
| 2300 | }
|
---|
| 2301 | state.mode = DONE;
|
---|
| 2302 | /* falls through */
|
---|
| 2303 | case DONE:
|
---|
| 2304 | ret = Z_STREAM_END;
|
---|
| 2305 | break inf_leave;
|
---|
| 2306 | case BAD:
|
---|
| 2307 | ret = Z_DATA_ERROR;
|
---|
| 2308 | break inf_leave;
|
---|
| 2309 | case MEM:
|
---|
| 2310 | return Z_MEM_ERROR;
|
---|
| 2311 | case SYNC:
|
---|
| 2312 | /* falls through */
|
---|
| 2313 | default:
|
---|
| 2314 | return Z_STREAM_ERROR;
|
---|
| 2315 | }
|
---|
| 2316 | }
|
---|
| 2317 |
|
---|
| 2318 | // inf_leave <- here is real place for "goto inf_leave", emulated via "break inf_leave"
|
---|
| 2319 |
|
---|
| 2320 | /*
|
---|
| 2321 | Return from inflate(), updating the total counts and the check value.
|
---|
| 2322 | If there was no progress during the inflate() call, return a buffer
|
---|
| 2323 | error. Call updatewindow() to create and/or update the window state.
|
---|
| 2324 | Note: a memory error from inflate() is non-recoverable.
|
---|
| 2325 | */
|
---|
| 2326 |
|
---|
| 2327 | //--- RESTORE() ---
|
---|
| 2328 | strm.next_out = put;
|
---|
| 2329 | strm.avail_out = left;
|
---|
| 2330 | strm.next_in = next;
|
---|
| 2331 | strm.avail_in = have;
|
---|
| 2332 | state.hold = hold;
|
---|
| 2333 | state.bits = bits;
|
---|
| 2334 | //---
|
---|
| 2335 |
|
---|
| 2336 | if (state.wsize || (_out !== strm.avail_out && state.mode < BAD &&
|
---|
| 2337 | (state.mode < CHECK || flush !== Z_FINISH))) {
|
---|
| 2338 | if (updatewindow(strm, strm.output, strm.next_out, _out - strm.avail_out)) {
|
---|
| 2339 | state.mode = MEM;
|
---|
| 2340 | return Z_MEM_ERROR;
|
---|
| 2341 | }
|
---|
| 2342 | }
|
---|
| 2343 | _in -= strm.avail_in;
|
---|
| 2344 | _out -= strm.avail_out;
|
---|
| 2345 | strm.total_in += _in;
|
---|
| 2346 | strm.total_out += _out;
|
---|
| 2347 | state.total += _out;
|
---|
| 2348 | if (state.wrap && _out) {
|
---|
| 2349 | strm.adler = state.check = /*UPDATE(state.check, strm.next_out - _out, _out);*/
|
---|
| 2350 | (state.flags ? crc32(state.check, output, _out, strm.next_out - _out) : adler32(state.check, output, _out, strm.next_out - _out));
|
---|
| 2351 | }
|
---|
| 2352 | strm.data_type = state.bits + (state.last ? 64 : 0) +
|
---|
| 2353 | (state.mode === TYPE ? 128 : 0) +
|
---|
| 2354 | (state.mode === LEN_ || state.mode === COPY_ ? 256 : 0);
|
---|
| 2355 | if (((_in === 0 && _out === 0) || flush === Z_FINISH) && ret === Z_OK) {
|
---|
| 2356 | ret = Z_BUF_ERROR;
|
---|
| 2357 | }
|
---|
| 2358 | return ret;
|
---|
| 2359 | }
|
---|
| 2360 |
|
---|
| 2361 | function inflateEnd(strm) {
|
---|
| 2362 |
|
---|
| 2363 | if (!strm || !strm.state /*|| strm->zfree == (free_func)0*/) {
|
---|
| 2364 | return Z_STREAM_ERROR;
|
---|
| 2365 | }
|
---|
| 2366 |
|
---|
| 2367 | var state = strm.state;
|
---|
| 2368 | if (state.window) {
|
---|
| 2369 | state.window = null;
|
---|
| 2370 | }
|
---|
| 2371 | strm.state = null;
|
---|
| 2372 | return Z_OK;
|
---|
| 2373 | }
|
---|
| 2374 |
|
---|
| 2375 | function inflateGetHeader(strm, head) {
|
---|
| 2376 | var state;
|
---|
| 2377 |
|
---|
| 2378 | /* check state */
|
---|
| 2379 | if (!strm || !strm.state) { return Z_STREAM_ERROR; }
|
---|
| 2380 | state = strm.state;
|
---|
| 2381 | if ((state.wrap & 2) === 0) { return Z_STREAM_ERROR; }
|
---|
| 2382 |
|
---|
| 2383 | /* save header structure */
|
---|
| 2384 | state.head = head;
|
---|
| 2385 | head.done = false;
|
---|
| 2386 | return Z_OK;
|
---|
| 2387 | }
|
---|
| 2388 |
|
---|
| 2389 | function inflateSetDictionary(strm, dictionary) {
|
---|
| 2390 | var dictLength = dictionary.length;
|
---|
| 2391 |
|
---|
| 2392 | var state;
|
---|
| 2393 | var dictid;
|
---|
| 2394 | var ret;
|
---|
| 2395 |
|
---|
| 2396 | /* check state */
|
---|
| 2397 | if (!strm /* == Z_NULL */ || !strm.state /* == Z_NULL */) { return Z_STREAM_ERROR; }
|
---|
| 2398 | state = strm.state;
|
---|
| 2399 |
|
---|
| 2400 | if (state.wrap !== 0 && state.mode !== DICT) {
|
---|
| 2401 | return Z_STREAM_ERROR;
|
---|
| 2402 | }
|
---|
| 2403 |
|
---|
| 2404 | /* check for correct dictionary identifier */
|
---|
| 2405 | if (state.mode === DICT) {
|
---|
| 2406 | dictid = 1; /* adler32(0, null, 0)*/
|
---|
| 2407 | /* dictid = adler32(dictid, dictionary, dictLength); */
|
---|
| 2408 | dictid = adler32(dictid, dictionary, dictLength, 0);
|
---|
| 2409 | if (dictid !== state.check) {
|
---|
| 2410 | return Z_DATA_ERROR;
|
---|
| 2411 | }
|
---|
| 2412 | }
|
---|
| 2413 | /* copy dictionary to window using updatewindow(), which will amend the
|
---|
| 2414 | existing dictionary if appropriate */
|
---|
| 2415 | ret = updatewindow(strm, dictionary, dictLength, dictLength);
|
---|
| 2416 | if (ret) {
|
---|
| 2417 | state.mode = MEM;
|
---|
| 2418 | return Z_MEM_ERROR;
|
---|
| 2419 | }
|
---|
| 2420 | state.havedict = 1;
|
---|
| 2421 | // Tracev((stderr, "inflate: dictionary set\n"));
|
---|
| 2422 | return Z_OK;
|
---|
| 2423 | }
|
---|
| 2424 |
|
---|
| 2425 | exports.inflateReset = inflateReset;
|
---|
| 2426 | exports.inflateReset2 = inflateReset2;
|
---|
| 2427 | exports.inflateResetKeep = inflateResetKeep;
|
---|
| 2428 | exports.inflateInit = inflateInit;
|
---|
| 2429 | exports.inflateInit2 = inflateInit2;
|
---|
| 2430 | exports.inflate = inflate;
|
---|
| 2431 | exports.inflateEnd = inflateEnd;
|
---|
| 2432 | exports.inflateGetHeader = inflateGetHeader;
|
---|
| 2433 | exports.inflateSetDictionary = inflateSetDictionary;
|
---|
| 2434 | exports.inflateInfo = 'pako inflate (from Nodeca project)';
|
---|
| 2435 |
|
---|
| 2436 | /* Not implemented
|
---|
| 2437 | exports.inflateCopy = inflateCopy;
|
---|
| 2438 | exports.inflateGetDictionary = inflateGetDictionary;
|
---|
| 2439 | exports.inflateMark = inflateMark;
|
---|
| 2440 | exports.inflatePrime = inflatePrime;
|
---|
| 2441 | exports.inflateSync = inflateSync;
|
---|
| 2442 | exports.inflateSyncPoint = inflateSyncPoint;
|
---|
| 2443 | exports.inflateUndermine = inflateUndermine;
|
---|
| 2444 | */
|
---|
| 2445 |
|
---|
| 2446 | },{"../utils/common":1,"./adler32":3,"./crc32":5,"./inffast":7,"./inftrees":9}],9:[function(require,module,exports){
|
---|
| 2447 | 'use strict';
|
---|
| 2448 |
|
---|
| 2449 | // (C) 1995-2013 Jean-loup Gailly and Mark Adler
|
---|
| 2450 | // (C) 2014-2017 Vitaly Puzrin and Andrey Tupitsin
|
---|
| 2451 | //
|
---|
| 2452 | // This software is provided 'as-is', without any express or implied
|
---|
| 2453 | // warranty. In no event will the authors be held liable for any damages
|
---|
| 2454 | // arising from the use of this software.
|
---|
| 2455 | //
|
---|
| 2456 | // Permission is granted to anyone to use this software for any purpose,
|
---|
| 2457 | // including commercial applications, and to alter it and redistribute it
|
---|
| 2458 | // freely, subject to the following restrictions:
|
---|
| 2459 | //
|
---|
| 2460 | // 1. The origin of this software must not be misrepresented; you must not
|
---|
| 2461 | // claim that you wrote the original software. If you use this software
|
---|
| 2462 | // in a product, an acknowledgment in the product documentation would be
|
---|
| 2463 | // appreciated but is not required.
|
---|
| 2464 | // 2. Altered source versions must be plainly marked as such, and must not be
|
---|
| 2465 | // misrepresented as being the original software.
|
---|
| 2466 | // 3. This notice may not be removed or altered from any source distribution.
|
---|
| 2467 |
|
---|
| 2468 | var utils = require('../utils/common');
|
---|
| 2469 |
|
---|
| 2470 | var MAXBITS = 15;
|
---|
| 2471 | var ENOUGH_LENS = 852;
|
---|
| 2472 | var ENOUGH_DISTS = 592;
|
---|
| 2473 | //var ENOUGH = (ENOUGH_LENS+ENOUGH_DISTS);
|
---|
| 2474 |
|
---|
| 2475 | var CODES = 0;
|
---|
| 2476 | var LENS = 1;
|
---|
| 2477 | var DISTS = 2;
|
---|
| 2478 |
|
---|
| 2479 | var lbase = [ /* Length codes 257..285 base */
|
---|
| 2480 | 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 15, 17, 19, 23, 27, 31,
|
---|
| 2481 | 35, 43, 51, 59, 67, 83, 99, 115, 131, 163, 195, 227, 258, 0, 0
|
---|
| 2482 | ];
|
---|
| 2483 |
|
---|
| 2484 | var lext = [ /* Length codes 257..285 extra */
|
---|
| 2485 | 16, 16, 16, 16, 16, 16, 16, 16, 17, 17, 17, 17, 18, 18, 18, 18,
|
---|
| 2486 | 19, 19, 19, 19, 20, 20, 20, 20, 21, 21, 21, 21, 16, 72, 78
|
---|
| 2487 | ];
|
---|
| 2488 |
|
---|
| 2489 | var dbase = [ /* Distance codes 0..29 base */
|
---|
| 2490 | 1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, 49, 65, 97, 129, 193,
|
---|
| 2491 | 257, 385, 513, 769, 1025, 1537, 2049, 3073, 4097, 6145,
|
---|
| 2492 | 8193, 12289, 16385, 24577, 0, 0
|
---|
| 2493 | ];
|
---|
| 2494 |
|
---|
| 2495 | var dext = [ /* Distance codes 0..29 extra */
|
---|
| 2496 | 16, 16, 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22,
|
---|
| 2497 | 23, 23, 24, 24, 25, 25, 26, 26, 27, 27,
|
---|
| 2498 | 28, 28, 29, 29, 64, 64
|
---|
| 2499 | ];
|
---|
| 2500 |
|
---|
| 2501 | module.exports = function inflate_table(type, lens, lens_index, codes, table, table_index, work, opts)
|
---|
| 2502 | {
|
---|
| 2503 | var bits = opts.bits;
|
---|
| 2504 | //here = opts.here; /* table entry for duplication */
|
---|
| 2505 |
|
---|
| 2506 | var len = 0; /* a code's length in bits */
|
---|
| 2507 | var sym = 0; /* index of code symbols */
|
---|
| 2508 | var min = 0, max = 0; /* minimum and maximum code lengths */
|
---|
| 2509 | var root = 0; /* number of index bits for root table */
|
---|
| 2510 | var curr = 0; /* number of index bits for current table */
|
---|
| 2511 | var drop = 0; /* code bits to drop for sub-table */
|
---|
| 2512 | var left = 0; /* number of prefix codes available */
|
---|
| 2513 | var used = 0; /* code entries in table used */
|
---|
| 2514 | var huff = 0; /* Huffman code */
|
---|
| 2515 | var incr; /* for incrementing code, index */
|
---|
| 2516 | var fill; /* index for replicating entries */
|
---|
| 2517 | var low; /* low bits for current root entry */
|
---|
| 2518 | var mask; /* mask for low root bits */
|
---|
| 2519 | var next; /* next available space in table */
|
---|
| 2520 | var base = null; /* base value table to use */
|
---|
| 2521 | var base_index = 0;
|
---|
| 2522 | // var shoextra; /* extra bits table to use */
|
---|
| 2523 | var end; /* use base and extra for symbol > end */
|
---|
| 2524 | var count = new utils.Buf16(MAXBITS + 1); //[MAXBITS+1]; /* number of codes of each length */
|
---|
| 2525 | var offs = new utils.Buf16(MAXBITS + 1); //[MAXBITS+1]; /* offsets in table for each length */
|
---|
| 2526 | var extra = null;
|
---|
| 2527 | var extra_index = 0;
|
---|
| 2528 |
|
---|
| 2529 | var here_bits, here_op, here_val;
|
---|
| 2530 |
|
---|
| 2531 | /*
|
---|
| 2532 | Process a set of code lengths to create a canonical Huffman code. The
|
---|
| 2533 | code lengths are lens[0..codes-1]. Each length corresponds to the
|
---|
| 2534 | symbols 0..codes-1. The Huffman code is generated by first sorting the
|
---|
| 2535 | symbols by length from short to long, and retaining the symbol order
|
---|
| 2536 | for codes with equal lengths. Then the code starts with all zero bits
|
---|
| 2537 | for the first code of the shortest length, and the codes are integer
|
---|
| 2538 | increments for the same length, and zeros are appended as the length
|
---|
| 2539 | increases. For the deflate format, these bits are stored backwards
|
---|
| 2540 | from their more natural integer increment ordering, and so when the
|
---|
| 2541 | decoding tables are built in the large loop below, the integer codes
|
---|
| 2542 | are incremented backwards.
|
---|
| 2543 |
|
---|
| 2544 | This routine assumes, but does not check, that all of the entries in
|
---|
| 2545 | lens[] are in the range 0..MAXBITS. The caller must assure this.
|
---|
| 2546 | 1..MAXBITS is interpreted as that code length. zero means that that
|
---|
| 2547 | symbol does not occur in this code.
|
---|
| 2548 |
|
---|
| 2549 | The codes are sorted by computing a count of codes for each length,
|
---|
| 2550 | creating from that a table of starting indices for each length in the
|
---|
| 2551 | sorted table, and then entering the symbols in order in the sorted
|
---|
| 2552 | table. The sorted table is work[], with that space being provided by
|
---|
| 2553 | the caller.
|
---|
| 2554 |
|
---|
| 2555 | The length counts are used for other purposes as well, i.e. finding
|
---|
| 2556 | the minimum and maximum length codes, determining if there are any
|
---|
| 2557 | codes at all, checking for a valid set of lengths, and looking ahead
|
---|
| 2558 | at length counts to determine sub-table sizes when building the
|
---|
| 2559 | decoding tables.
|
---|
| 2560 | */
|
---|
| 2561 |
|
---|
| 2562 | /* accumulate lengths for codes (assumes lens[] all in 0..MAXBITS) */
|
---|
| 2563 | for (len = 0; len <= MAXBITS; len++) {
|
---|
| 2564 | count[len] = 0;
|
---|
| 2565 | }
|
---|
| 2566 | for (sym = 0; sym < codes; sym++) {
|
---|
| 2567 | count[lens[lens_index + sym]]++;
|
---|
| 2568 | }
|
---|
| 2569 |
|
---|
| 2570 | /* bound code lengths, force root to be within code lengths */
|
---|
| 2571 | root = bits;
|
---|
| 2572 | for (max = MAXBITS; max >= 1; max--) {
|
---|
| 2573 | if (count[max] !== 0) { break; }
|
---|
| 2574 | }
|
---|
| 2575 | if (root > max) {
|
---|
| 2576 | root = max;
|
---|
| 2577 | }
|
---|
| 2578 | if (max === 0) { /* no symbols to code at all */
|
---|
| 2579 | //table.op[opts.table_index] = 64; //here.op = (var char)64; /* invalid code marker */
|
---|
| 2580 | //table.bits[opts.table_index] = 1; //here.bits = (var char)1;
|
---|
| 2581 | //table.val[opts.table_index++] = 0; //here.val = (var short)0;
|
---|
| 2582 | table[table_index++] = (1 << 24) | (64 << 16) | 0;
|
---|
| 2583 |
|
---|
| 2584 |
|
---|
| 2585 | //table.op[opts.table_index] = 64;
|
---|
| 2586 | //table.bits[opts.table_index] = 1;
|
---|
| 2587 | //table.val[opts.table_index++] = 0;
|
---|
| 2588 | table[table_index++] = (1 << 24) | (64 << 16) | 0;
|
---|
| 2589 |
|
---|
| 2590 | opts.bits = 1;
|
---|
| 2591 | return 0; /* no symbols, but wait for decoding to report error */
|
---|
| 2592 | }
|
---|
| 2593 | for (min = 1; min < max; min++) {
|
---|
| 2594 | if (count[min] !== 0) { break; }
|
---|
| 2595 | }
|
---|
| 2596 | if (root < min) {
|
---|
| 2597 | root = min;
|
---|
| 2598 | }
|
---|
| 2599 |
|
---|
| 2600 | /* check for an over-subscribed or incomplete set of lengths */
|
---|
| 2601 | left = 1;
|
---|
| 2602 | for (len = 1; len <= MAXBITS; len++) {
|
---|
| 2603 | left <<= 1;
|
---|
| 2604 | left -= count[len];
|
---|
| 2605 | if (left < 0) {
|
---|
| 2606 | return -1;
|
---|
| 2607 | } /* over-subscribed */
|
---|
| 2608 | }
|
---|
| 2609 | if (left > 0 && (type === CODES || max !== 1)) {
|
---|
| 2610 | return -1; /* incomplete set */
|
---|
| 2611 | }
|
---|
| 2612 |
|
---|
| 2613 | /* generate offsets into symbol table for each length for sorting */
|
---|
| 2614 | offs[1] = 0;
|
---|
| 2615 | for (len = 1; len < MAXBITS; len++) {
|
---|
| 2616 | offs[len + 1] = offs[len] + count[len];
|
---|
| 2617 | }
|
---|
| 2618 |
|
---|
| 2619 | /* sort symbols by length, by symbol order within each length */
|
---|
| 2620 | for (sym = 0; sym < codes; sym++) {
|
---|
| 2621 | if (lens[lens_index + sym] !== 0) {
|
---|
| 2622 | work[offs[lens[lens_index + sym]]++] = sym;
|
---|
| 2623 | }
|
---|
| 2624 | }
|
---|
| 2625 |
|
---|
| 2626 | /*
|
---|
| 2627 | Create and fill in decoding tables. In this loop, the table being
|
---|
| 2628 | filled is at next and has curr index bits. The code being used is huff
|
---|
| 2629 | with length len. That code is converted to an index by dropping drop
|
---|
| 2630 | bits off of the bottom. For codes where len is less than drop + curr,
|
---|
| 2631 | those top drop + curr - len bits are incremented through all values to
|
---|
| 2632 | fill the table with replicated entries.
|
---|
| 2633 |
|
---|
| 2634 | root is the number of index bits for the root table. When len exceeds
|
---|
| 2635 | root, sub-tables are created pointed to by the root entry with an index
|
---|
| 2636 | of the low root bits of huff. This is saved in low to check for when a
|
---|
| 2637 | new sub-table should be started. drop is zero when the root table is
|
---|
| 2638 | being filled, and drop is root when sub-tables are being filled.
|
---|
| 2639 |
|
---|
| 2640 | When a new sub-table is needed, it is necessary to look ahead in the
|
---|
| 2641 | code lengths to determine what size sub-table is needed. The length
|
---|
| 2642 | counts are used for this, and so count[] is decremented as codes are
|
---|
| 2643 | entered in the tables.
|
---|
| 2644 |
|
---|
| 2645 | used keeps track of how many table entries have been allocated from the
|
---|
| 2646 | provided *table space. It is checked for LENS and DIST tables against
|
---|
| 2647 | the constants ENOUGH_LENS and ENOUGH_DISTS to guard against changes in
|
---|
| 2648 | the initial root table size constants. See the comments in inftrees.h
|
---|
| 2649 | for more information.
|
---|
| 2650 |
|
---|
| 2651 | sym increments through all symbols, and the loop terminates when
|
---|
| 2652 | all codes of length max, i.e. all codes, have been processed. This
|
---|
| 2653 | routine permits incomplete codes, so another loop after this one fills
|
---|
| 2654 | in the rest of the decoding tables with invalid code markers.
|
---|
| 2655 | */
|
---|
| 2656 |
|
---|
| 2657 | /* set up for code type */
|
---|
| 2658 | // poor man optimization - use if-else instead of switch,
|
---|
| 2659 | // to avoid deopts in old v8
|
---|
| 2660 | if (type === CODES) {
|
---|
| 2661 | base = extra = work; /* dummy value--not used */
|
---|
| 2662 | end = 19;
|
---|
| 2663 |
|
---|
| 2664 | } else if (type === LENS) {
|
---|
| 2665 | base = lbase;
|
---|
| 2666 | base_index -= 257;
|
---|
| 2667 | extra = lext;
|
---|
| 2668 | extra_index -= 257;
|
---|
| 2669 | end = 256;
|
---|
| 2670 |
|
---|
| 2671 | } else { /* DISTS */
|
---|
| 2672 | base = dbase;
|
---|
| 2673 | extra = dext;
|
---|
| 2674 | end = -1;
|
---|
| 2675 | }
|
---|
| 2676 |
|
---|
| 2677 | /* initialize opts for loop */
|
---|
| 2678 | huff = 0; /* starting code */
|
---|
| 2679 | sym = 0; /* starting code symbol */
|
---|
| 2680 | len = min; /* starting code length */
|
---|
| 2681 | next = table_index; /* current table to fill in */
|
---|
| 2682 | curr = root; /* current table index bits */
|
---|
| 2683 | drop = 0; /* current bits to drop from code for index */
|
---|
| 2684 | low = -1; /* trigger new sub-table when len > root */
|
---|
| 2685 | used = 1 << root; /* use root table entries */
|
---|
| 2686 | mask = used - 1; /* mask for comparing low */
|
---|
| 2687 |
|
---|
| 2688 | /* check available table space */
|
---|
| 2689 | if ((type === LENS && used > ENOUGH_LENS) ||
|
---|
| 2690 | (type === DISTS && used > ENOUGH_DISTS)) {
|
---|
| 2691 | return 1;
|
---|
| 2692 | }
|
---|
| 2693 |
|
---|
| 2694 | /* process all codes and make table entries */
|
---|
| 2695 | for (;;) {
|
---|
| 2696 | /* create table entry */
|
---|
| 2697 | here_bits = len - drop;
|
---|
| 2698 | if (work[sym] < end) {
|
---|
| 2699 | here_op = 0;
|
---|
| 2700 | here_val = work[sym];
|
---|
| 2701 | }
|
---|
| 2702 | else if (work[sym] > end) {
|
---|
| 2703 | here_op = extra[extra_index + work[sym]];
|
---|
| 2704 | here_val = base[base_index + work[sym]];
|
---|
| 2705 | }
|
---|
| 2706 | else {
|
---|
| 2707 | here_op = 32 + 64; /* end of block */
|
---|
| 2708 | here_val = 0;
|
---|
| 2709 | }
|
---|
| 2710 |
|
---|
| 2711 | /* replicate for those indices with low len bits equal to huff */
|
---|
| 2712 | incr = 1 << (len - drop);
|
---|
| 2713 | fill = 1 << curr;
|
---|
| 2714 | min = fill; /* save offset to next table */
|
---|
| 2715 | do {
|
---|
| 2716 | fill -= incr;
|
---|
| 2717 | table[next + (huff >> drop) + fill] = (here_bits << 24) | (here_op << 16) | here_val |0;
|
---|
| 2718 | } while (fill !== 0);
|
---|
| 2719 |
|
---|
| 2720 | /* backwards increment the len-bit code huff */
|
---|
| 2721 | incr = 1 << (len - 1);
|
---|
| 2722 | while (huff & incr) {
|
---|
| 2723 | incr >>= 1;
|
---|
| 2724 | }
|
---|
| 2725 | if (incr !== 0) {
|
---|
| 2726 | huff &= incr - 1;
|
---|
| 2727 | huff += incr;
|
---|
| 2728 | } else {
|
---|
| 2729 | huff = 0;
|
---|
| 2730 | }
|
---|
| 2731 |
|
---|
| 2732 | /* go to next symbol, update count, len */
|
---|
| 2733 | sym++;
|
---|
| 2734 | if (--count[len] === 0) {
|
---|
| 2735 | if (len === max) { break; }
|
---|
| 2736 | len = lens[lens_index + work[sym]];
|
---|
| 2737 | }
|
---|
| 2738 |
|
---|
| 2739 | /* create new sub-table if needed */
|
---|
| 2740 | if (len > root && (huff & mask) !== low) {
|
---|
| 2741 | /* if first time, transition to sub-tables */
|
---|
| 2742 | if (drop === 0) {
|
---|
| 2743 | drop = root;
|
---|
| 2744 | }
|
---|
| 2745 |
|
---|
| 2746 | /* increment past last table */
|
---|
| 2747 | next += min; /* here min is 1 << curr */
|
---|
| 2748 |
|
---|
| 2749 | /* determine length of next table */
|
---|
| 2750 | curr = len - drop;
|
---|
| 2751 | left = 1 << curr;
|
---|
| 2752 | while (curr + drop < max) {
|
---|
| 2753 | left -= count[curr + drop];
|
---|
| 2754 | if (left <= 0) { break; }
|
---|
| 2755 | curr++;
|
---|
| 2756 | left <<= 1;
|
---|
| 2757 | }
|
---|
| 2758 |
|
---|
| 2759 | /* check for enough space */
|
---|
| 2760 | used += 1 << curr;
|
---|
| 2761 | if ((type === LENS && used > ENOUGH_LENS) ||
|
---|
| 2762 | (type === DISTS && used > ENOUGH_DISTS)) {
|
---|
| 2763 | return 1;
|
---|
| 2764 | }
|
---|
| 2765 |
|
---|
| 2766 | /* point entry in root table to sub-table */
|
---|
| 2767 | low = huff & mask;
|
---|
| 2768 | /*table.op[low] = curr;
|
---|
| 2769 | table.bits[low] = root;
|
---|
| 2770 | table.val[low] = next - opts.table_index;*/
|
---|
| 2771 | table[low] = (root << 24) | (curr << 16) | (next - table_index) |0;
|
---|
| 2772 | }
|
---|
| 2773 | }
|
---|
| 2774 |
|
---|
| 2775 | /* fill in remaining table entry if code is incomplete (guaranteed to have
|
---|
| 2776 | at most one remaining entry, since if the code is incomplete, the
|
---|
| 2777 | maximum code length that was allowed to get this far is one bit) */
|
---|
| 2778 | if (huff !== 0) {
|
---|
| 2779 | //table.op[next + huff] = 64; /* invalid code marker */
|
---|
| 2780 | //table.bits[next + huff] = len - drop;
|
---|
| 2781 | //table.val[next + huff] = 0;
|
---|
| 2782 | table[next + huff] = ((len - drop) << 24) | (64 << 16) |0;
|
---|
| 2783 | }
|
---|
| 2784 |
|
---|
| 2785 | /* set return parameters */
|
---|
| 2786 | //opts.table_index += used;
|
---|
| 2787 | opts.bits = root;
|
---|
| 2788 | return 0;
|
---|
| 2789 | };
|
---|
| 2790 |
|
---|
| 2791 | },{"../utils/common":1}],10:[function(require,module,exports){
|
---|
| 2792 | 'use strict';
|
---|
| 2793 |
|
---|
| 2794 | // (C) 1995-2013 Jean-loup Gailly and Mark Adler
|
---|
| 2795 | // (C) 2014-2017 Vitaly Puzrin and Andrey Tupitsin
|
---|
| 2796 | //
|
---|
| 2797 | // This software is provided 'as-is', without any express or implied
|
---|
| 2798 | // warranty. In no event will the authors be held liable for any damages
|
---|
| 2799 | // arising from the use of this software.
|
---|
| 2800 | //
|
---|
| 2801 | // Permission is granted to anyone to use this software for any purpose,
|
---|
| 2802 | // including commercial applications, and to alter it and redistribute it
|
---|
| 2803 | // freely, subject to the following restrictions:
|
---|
| 2804 | //
|
---|
| 2805 | // 1. The origin of this software must not be misrepresented; you must not
|
---|
| 2806 | // claim that you wrote the original software. If you use this software
|
---|
| 2807 | // in a product, an acknowledgment in the product documentation would be
|
---|
| 2808 | // appreciated but is not required.
|
---|
| 2809 | // 2. Altered source versions must be plainly marked as such, and must not be
|
---|
| 2810 | // misrepresented as being the original software.
|
---|
| 2811 | // 3. This notice may not be removed or altered from any source distribution.
|
---|
| 2812 |
|
---|
| 2813 | module.exports = {
|
---|
| 2814 | 2: 'need dictionary', /* Z_NEED_DICT 2 */
|
---|
| 2815 | 1: 'stream end', /* Z_STREAM_END 1 */
|
---|
| 2816 | 0: '', /* Z_OK 0 */
|
---|
| 2817 | '-1': 'file error', /* Z_ERRNO (-1) */
|
---|
| 2818 | '-2': 'stream error', /* Z_STREAM_ERROR (-2) */
|
---|
| 2819 | '-3': 'data error', /* Z_DATA_ERROR (-3) */
|
---|
| 2820 | '-4': 'insufficient memory', /* Z_MEM_ERROR (-4) */
|
---|
| 2821 | '-5': 'buffer error', /* Z_BUF_ERROR (-5) */
|
---|
| 2822 | '-6': 'incompatible version' /* Z_VERSION_ERROR (-6) */
|
---|
| 2823 | };
|
---|
| 2824 |
|
---|
| 2825 | },{}],11:[function(require,module,exports){
|
---|
| 2826 | 'use strict';
|
---|
| 2827 |
|
---|
| 2828 | // (C) 1995-2013 Jean-loup Gailly and Mark Adler
|
---|
| 2829 | // (C) 2014-2017 Vitaly Puzrin and Andrey Tupitsin
|
---|
| 2830 | //
|
---|
| 2831 | // This software is provided 'as-is', without any express or implied
|
---|
| 2832 | // warranty. In no event will the authors be held liable for any damages
|
---|
| 2833 | // arising from the use of this software.
|
---|
| 2834 | //
|
---|
| 2835 | // Permission is granted to anyone to use this software for any purpose,
|
---|
| 2836 | // including commercial applications, and to alter it and redistribute it
|
---|
| 2837 | // freely, subject to the following restrictions:
|
---|
| 2838 | //
|
---|
| 2839 | // 1. The origin of this software must not be misrepresented; you must not
|
---|
| 2840 | // claim that you wrote the original software. If you use this software
|
---|
| 2841 | // in a product, an acknowledgment in the product documentation would be
|
---|
| 2842 | // appreciated but is not required.
|
---|
| 2843 | // 2. Altered source versions must be plainly marked as such, and must not be
|
---|
| 2844 | // misrepresented as being the original software.
|
---|
| 2845 | // 3. This notice may not be removed or altered from any source distribution.
|
---|
| 2846 |
|
---|
| 2847 | function ZStream() {
|
---|
| 2848 | /* next input byte */
|
---|
| 2849 | this.input = null; // JS specific, because we have no pointers
|
---|
| 2850 | this.next_in = 0;
|
---|
| 2851 | /* number of bytes available at input */
|
---|
| 2852 | this.avail_in = 0;
|
---|
| 2853 | /* total number of input bytes read so far */
|
---|
| 2854 | this.total_in = 0;
|
---|
| 2855 | /* next output byte should be put there */
|
---|
| 2856 | this.output = null; // JS specific, because we have no pointers
|
---|
| 2857 | this.next_out = 0;
|
---|
| 2858 | /* remaining free space at output */
|
---|
| 2859 | this.avail_out = 0;
|
---|
| 2860 | /* total number of bytes output so far */
|
---|
| 2861 | this.total_out = 0;
|
---|
| 2862 | /* last error message, NULL if no error */
|
---|
| 2863 | this.msg = ''/*Z_NULL*/;
|
---|
| 2864 | /* not visible by applications */
|
---|
| 2865 | this.state = null;
|
---|
| 2866 | /* best guess about the data type: binary or text */
|
---|
| 2867 | this.data_type = 2/*Z_UNKNOWN*/;
|
---|
| 2868 | /* adler32 value of the uncompressed data */
|
---|
| 2869 | this.adler = 0;
|
---|
| 2870 | }
|
---|
| 2871 |
|
---|
| 2872 | module.exports = ZStream;
|
---|
| 2873 |
|
---|
| 2874 | },{}],"/lib/inflate.js":[function(require,module,exports){
|
---|
| 2875 | 'use strict';
|
---|
| 2876 |
|
---|
| 2877 |
|
---|
| 2878 | var zlib_inflate = require('./zlib/inflate');
|
---|
| 2879 | var utils = require('./utils/common');
|
---|
| 2880 | var strings = require('./utils/strings');
|
---|
| 2881 | var c = require('./zlib/constants');
|
---|
| 2882 | var msg = require('./zlib/messages');
|
---|
| 2883 | var ZStream = require('./zlib/zstream');
|
---|
| 2884 | var GZheader = require('./zlib/gzheader');
|
---|
| 2885 |
|
---|
| 2886 | var toString = Object.prototype.toString;
|
---|
| 2887 |
|
---|
| 2888 | /**
|
---|
| 2889 | * class Inflate
|
---|
| 2890 | *
|
---|
| 2891 | * Generic JS-style wrapper for zlib calls. If you don't need
|
---|
| 2892 | * streaming behaviour - use more simple functions: [[inflate]]
|
---|
| 2893 | * and [[inflateRaw]].
|
---|
| 2894 | **/
|
---|
| 2895 |
|
---|
| 2896 | /* internal
|
---|
| 2897 | * inflate.chunks -> Array
|
---|
| 2898 | *
|
---|
| 2899 | * Chunks of output data, if [[Inflate#onData]] not overridden.
|
---|
| 2900 | **/
|
---|
| 2901 |
|
---|
| 2902 | /**
|
---|
| 2903 | * Inflate.result -> Uint8Array|Array|String
|
---|
| 2904 | *
|
---|
| 2905 | * Uncompressed result, generated by default [[Inflate#onData]]
|
---|
| 2906 | * and [[Inflate#onEnd]] handlers. Filled after you push last chunk
|
---|
| 2907 | * (call [[Inflate#push]] with `Z_FINISH` / `true` param) or if you
|
---|
| 2908 | * push a chunk with explicit flush (call [[Inflate#push]] with
|
---|
| 2909 | * `Z_SYNC_FLUSH` param).
|
---|
| 2910 | **/
|
---|
| 2911 |
|
---|
| 2912 | /**
|
---|
| 2913 | * Inflate.err -> Number
|
---|
| 2914 | *
|
---|
| 2915 | * Error code after inflate finished. 0 (Z_OK) on success.
|
---|
| 2916 | * Should be checked if broken data possible.
|
---|
| 2917 | **/
|
---|
| 2918 |
|
---|
| 2919 | /**
|
---|
| 2920 | * Inflate.msg -> String
|
---|
| 2921 | *
|
---|
| 2922 | * Error message, if [[Inflate.err]] != 0
|
---|
| 2923 | **/
|
---|
| 2924 |
|
---|
| 2925 |
|
---|
| 2926 | /**
|
---|
| 2927 | * new Inflate(options)
|
---|
| 2928 | * - options (Object): zlib inflate options.
|
---|
| 2929 | *
|
---|
| 2930 | * Creates new inflator instance with specified params. Throws exception
|
---|
| 2931 | * on bad params. Supported options:
|
---|
| 2932 | *
|
---|
| 2933 | * - `windowBits`
|
---|
| 2934 | * - `dictionary`
|
---|
| 2935 | *
|
---|
| 2936 | * [http://zlib.net/manual.html#Advanced](http://zlib.net/manual.html#Advanced)
|
---|
| 2937 | * for more information on these.
|
---|
| 2938 | *
|
---|
| 2939 | * Additional options, for internal needs:
|
---|
| 2940 | *
|
---|
| 2941 | * - `chunkSize` - size of generated data chunks (16K by default)
|
---|
| 2942 | * - `raw` (Boolean) - do raw inflate
|
---|
| 2943 | * - `to` (String) - if equal to 'string', then result will be converted
|
---|
| 2944 | * from utf8 to utf16 (javascript) string. When string output requested,
|
---|
| 2945 | * chunk length can differ from `chunkSize`, depending on content.
|
---|
| 2946 | *
|
---|
| 2947 | * By default, when no options set, autodetect deflate/gzip data format via
|
---|
| 2948 | * wrapper header.
|
---|
| 2949 | *
|
---|
| 2950 | * ##### Example:
|
---|
| 2951 | *
|
---|
| 2952 | * ```javascript
|
---|
| 2953 | * var pako = require('pako')
|
---|
| 2954 | * , chunk1 = Uint8Array([1,2,3,4,5,6,7,8,9])
|
---|
| 2955 | * , chunk2 = Uint8Array([10,11,12,13,14,15,16,17,18,19]);
|
---|
| 2956 | *
|
---|
| 2957 | * var inflate = new pako.Inflate({ level: 3});
|
---|
| 2958 | *
|
---|
| 2959 | * inflate.push(chunk1, false);
|
---|
| 2960 | * inflate.push(chunk2, true); // true -> last chunk
|
---|
| 2961 | *
|
---|
| 2962 | * if (inflate.err) { throw new Error(inflate.err); }
|
---|
| 2963 | *
|
---|
| 2964 | * console.log(inflate.result);
|
---|
| 2965 | * ```
|
---|
| 2966 | **/
|
---|
| 2967 | function Inflate(options) {
|
---|
| 2968 | if (!(this instanceof Inflate)) return new Inflate(options);
|
---|
| 2969 |
|
---|
| 2970 | this.options = utils.assign({
|
---|
| 2971 | chunkSize: 16384,
|
---|
| 2972 | windowBits: 0,
|
---|
| 2973 | to: ''
|
---|
| 2974 | }, options || {});
|
---|
| 2975 |
|
---|
| 2976 | var opt = this.options;
|
---|
| 2977 |
|
---|
| 2978 | // Force window size for `raw` data, if not set directly,
|
---|
| 2979 | // because we have no header for autodetect.
|
---|
| 2980 | if (opt.raw && (opt.windowBits >= 0) && (opt.windowBits < 16)) {
|
---|
| 2981 | opt.windowBits = -opt.windowBits;
|
---|
| 2982 | if (opt.windowBits === 0) { opt.windowBits = -15; }
|
---|
| 2983 | }
|
---|
| 2984 |
|
---|
| 2985 | // If `windowBits` not defined (and mode not raw) - set autodetect flag for gzip/deflate
|
---|
| 2986 | if ((opt.windowBits >= 0) && (opt.windowBits < 16) &&
|
---|
| 2987 | !(options && options.windowBits)) {
|
---|
| 2988 | opt.windowBits += 32;
|
---|
| 2989 | }
|
---|
| 2990 |
|
---|
| 2991 | // Gzip header has no info about windows size, we can do autodetect only
|
---|
| 2992 | // for deflate. So, if window size not set, force it to max when gzip possible
|
---|
| 2993 | if ((opt.windowBits > 15) && (opt.windowBits < 48)) {
|
---|
| 2994 | // bit 3 (16) -> gzipped data
|
---|
| 2995 | // bit 4 (32) -> autodetect gzip/deflate
|
---|
| 2996 | if ((opt.windowBits & 15) === 0) {
|
---|
| 2997 | opt.windowBits |= 15;
|
---|
| 2998 | }
|
---|
| 2999 | }
|
---|
| 3000 |
|
---|
| 3001 | this.err = 0; // error code, if happens (0 = Z_OK)
|
---|
| 3002 | this.msg = ''; // error message
|
---|
| 3003 | this.ended = false; // used to avoid multiple onEnd() calls
|
---|
| 3004 | this.chunks = []; // chunks of compressed data
|
---|
| 3005 |
|
---|
| 3006 | this.strm = new ZStream();
|
---|
| 3007 | this.strm.avail_out = 0;
|
---|
| 3008 |
|
---|
| 3009 | var status = zlib_inflate.inflateInit2(
|
---|
| 3010 | this.strm,
|
---|
| 3011 | opt.windowBits
|
---|
| 3012 | );
|
---|
| 3013 |
|
---|
| 3014 | if (status !== c.Z_OK) {
|
---|
| 3015 | throw new Error(msg[status]);
|
---|
| 3016 | }
|
---|
| 3017 |
|
---|
| 3018 | this.header = new GZheader();
|
---|
| 3019 |
|
---|
| 3020 | zlib_inflate.inflateGetHeader(this.strm, this.header);
|
---|
| 3021 |
|
---|
| 3022 | // Setup dictionary
|
---|
| 3023 | if (opt.dictionary) {
|
---|
| 3024 | // Convert data if needed
|
---|
| 3025 | if (typeof opt.dictionary === 'string') {
|
---|
| 3026 | opt.dictionary = strings.string2buf(opt.dictionary);
|
---|
| 3027 | } else if (toString.call(opt.dictionary) === '[object ArrayBuffer]') {
|
---|
| 3028 | opt.dictionary = new Uint8Array(opt.dictionary);
|
---|
| 3029 | }
|
---|
| 3030 | if (opt.raw) { //In raw mode we need to set the dictionary early
|
---|
| 3031 | status = zlib_inflate.inflateSetDictionary(this.strm, opt.dictionary);
|
---|
| 3032 | if (status !== c.Z_OK) {
|
---|
| 3033 | throw new Error(msg[status]);
|
---|
| 3034 | }
|
---|
| 3035 | }
|
---|
| 3036 | }
|
---|
| 3037 | }
|
---|
| 3038 |
|
---|
| 3039 | /**
|
---|
| 3040 | * Inflate#push(data[, mode]) -> Boolean
|
---|
| 3041 | * - data (Uint8Array|Array|ArrayBuffer|String): input data
|
---|
| 3042 | * - mode (Number|Boolean): 0..6 for corresponding Z_NO_FLUSH..Z_TREE modes.
|
---|
| 3043 | * See constants. Skipped or `false` means Z_NO_FLUSH, `true` means Z_FINISH.
|
---|
| 3044 | *
|
---|
| 3045 | * Sends input data to inflate pipe, generating [[Inflate#onData]] calls with
|
---|
| 3046 | * new output chunks. Returns `true` on success. The last data block must have
|
---|
| 3047 | * mode Z_FINISH (or `true`). That will flush internal pending buffers and call
|
---|
| 3048 | * [[Inflate#onEnd]]. For interim explicit flushes (without ending the stream) you
|
---|
| 3049 | * can use mode Z_SYNC_FLUSH, keeping the decompression context.
|
---|
| 3050 | *
|
---|
| 3051 | * On fail call [[Inflate#onEnd]] with error code and return false.
|
---|
| 3052 | *
|
---|
| 3053 | * We strongly recommend to use `Uint8Array` on input for best speed (output
|
---|
| 3054 | * format is detected automatically). Also, don't skip last param and always
|
---|
| 3055 | * use the same type in your code (boolean or number). That will improve JS speed.
|
---|
| 3056 | *
|
---|
| 3057 | * For regular `Array`-s make sure all elements are [0..255].
|
---|
| 3058 | *
|
---|
| 3059 | * ##### Example
|
---|
| 3060 | *
|
---|
| 3061 | * ```javascript
|
---|
| 3062 | * push(chunk, false); // push one of data chunks
|
---|
| 3063 | * ...
|
---|
| 3064 | * push(chunk, true); // push last chunk
|
---|
| 3065 | * ```
|
---|
| 3066 | **/
|
---|
| 3067 | Inflate.prototype.push = function (data, mode) {
|
---|
| 3068 | var strm = this.strm;
|
---|
| 3069 | var chunkSize = this.options.chunkSize;
|
---|
| 3070 | var dictionary = this.options.dictionary;
|
---|
| 3071 | var status, _mode;
|
---|
| 3072 | var next_out_utf8, tail, utf8str;
|
---|
| 3073 |
|
---|
| 3074 | // Flag to properly process Z_BUF_ERROR on testing inflate call
|
---|
| 3075 | // when we check that all output data was flushed.
|
---|
| 3076 | var allowBufError = false;
|
---|
| 3077 |
|
---|
| 3078 | if (this.ended) { return false; }
|
---|
| 3079 | _mode = (mode === ~~mode) ? mode : ((mode === true) ? c.Z_FINISH : c.Z_NO_FLUSH);
|
---|
| 3080 |
|
---|
| 3081 | // Convert data if needed
|
---|
| 3082 | if (typeof data === 'string') {
|
---|
| 3083 | // Only binary strings can be decompressed on practice
|
---|
| 3084 | strm.input = strings.binstring2buf(data);
|
---|
| 3085 | } else if (toString.call(data) === '[object ArrayBuffer]') {
|
---|
| 3086 | strm.input = new Uint8Array(data);
|
---|
| 3087 | } else {
|
---|
| 3088 | strm.input = data;
|
---|
| 3089 | }
|
---|
| 3090 |
|
---|
| 3091 | strm.next_in = 0;
|
---|
| 3092 | strm.avail_in = strm.input.length;
|
---|
| 3093 |
|
---|
| 3094 | do {
|
---|
| 3095 | if (strm.avail_out === 0) {
|
---|
| 3096 | strm.output = new utils.Buf8(chunkSize);
|
---|
| 3097 | strm.next_out = 0;
|
---|
| 3098 | strm.avail_out = chunkSize;
|
---|
| 3099 | }
|
---|
| 3100 |
|
---|
| 3101 | status = zlib_inflate.inflate(strm, c.Z_NO_FLUSH); /* no bad return value */
|
---|
| 3102 |
|
---|
| 3103 | if (status === c.Z_NEED_DICT && dictionary) {
|
---|
| 3104 | status = zlib_inflate.inflateSetDictionary(this.strm, dictionary);
|
---|
| 3105 | }
|
---|
| 3106 |
|
---|
| 3107 | if (status === c.Z_BUF_ERROR && allowBufError === true) {
|
---|
| 3108 | status = c.Z_OK;
|
---|
| 3109 | allowBufError = false;
|
---|
| 3110 | }
|
---|
| 3111 |
|
---|
| 3112 | if (status !== c.Z_STREAM_END && status !== c.Z_OK) {
|
---|
| 3113 | this.onEnd(status);
|
---|
| 3114 | this.ended = true;
|
---|
| 3115 | return false;
|
---|
| 3116 | }
|
---|
| 3117 |
|
---|
| 3118 | if (strm.next_out) {
|
---|
| 3119 | if (strm.avail_out === 0 || status === c.Z_STREAM_END || (strm.avail_in === 0 && (_mode === c.Z_FINISH || _mode === c.Z_SYNC_FLUSH))) {
|
---|
| 3120 |
|
---|
| 3121 | if (this.options.to === 'string') {
|
---|
| 3122 |
|
---|
| 3123 | next_out_utf8 = strings.utf8border(strm.output, strm.next_out);
|
---|
| 3124 |
|
---|
| 3125 | tail = strm.next_out - next_out_utf8;
|
---|
| 3126 | utf8str = strings.buf2string(strm.output, next_out_utf8);
|
---|
| 3127 |
|
---|
| 3128 | // move tail
|
---|
| 3129 | strm.next_out = tail;
|
---|
| 3130 | strm.avail_out = chunkSize - tail;
|
---|
| 3131 | if (tail) { utils.arraySet(strm.output, strm.output, next_out_utf8, tail, 0); }
|
---|
| 3132 |
|
---|
| 3133 | this.onData(utf8str);
|
---|
| 3134 |
|
---|
| 3135 | } else {
|
---|
| 3136 | this.onData(utils.shrinkBuf(strm.output, strm.next_out));
|
---|
| 3137 | }
|
---|
| 3138 | }
|
---|
| 3139 | }
|
---|
| 3140 |
|
---|
| 3141 | // When no more input data, we should check that internal inflate buffers
|
---|
| 3142 | // are flushed. The only way to do it when avail_out = 0 - run one more
|
---|
| 3143 | // inflate pass. But if output data not exists, inflate return Z_BUF_ERROR.
|
---|
| 3144 | // Here we set flag to process this error properly.
|
---|
| 3145 | //
|
---|
| 3146 | // NOTE. Deflate does not return error in this case and does not needs such
|
---|
| 3147 | // logic.
|
---|
| 3148 | if (strm.avail_in === 0 && strm.avail_out === 0) {
|
---|
| 3149 | allowBufError = true;
|
---|
| 3150 | }
|
---|
| 3151 |
|
---|
| 3152 | } while ((strm.avail_in > 0 || strm.avail_out === 0) && status !== c.Z_STREAM_END);
|
---|
| 3153 |
|
---|
| 3154 | if (status === c.Z_STREAM_END) {
|
---|
| 3155 | _mode = c.Z_FINISH;
|
---|
| 3156 | }
|
---|
| 3157 |
|
---|
| 3158 | // Finalize on the last chunk.
|
---|
| 3159 | if (_mode === c.Z_FINISH) {
|
---|
| 3160 | status = zlib_inflate.inflateEnd(this.strm);
|
---|
| 3161 | this.onEnd(status);
|
---|
| 3162 | this.ended = true;
|
---|
| 3163 | return status === c.Z_OK;
|
---|
| 3164 | }
|
---|
| 3165 |
|
---|
| 3166 | // callback interim results if Z_SYNC_FLUSH.
|
---|
| 3167 | if (_mode === c.Z_SYNC_FLUSH) {
|
---|
| 3168 | this.onEnd(c.Z_OK);
|
---|
| 3169 | strm.avail_out = 0;
|
---|
| 3170 | return true;
|
---|
| 3171 | }
|
---|
| 3172 |
|
---|
| 3173 | return true;
|
---|
| 3174 | };
|
---|
| 3175 |
|
---|
| 3176 |
|
---|
| 3177 | /**
|
---|
| 3178 | * Inflate#onData(chunk) -> Void
|
---|
| 3179 | * - chunk (Uint8Array|Array|String): output data. Type of array depends
|
---|
| 3180 | * on js engine support. When string output requested, each chunk
|
---|
| 3181 | * will be string.
|
---|
| 3182 | *
|
---|
| 3183 | * By default, stores data blocks in `chunks[]` property and glue
|
---|
| 3184 | * those in `onEnd`. Override this handler, if you need another behaviour.
|
---|
| 3185 | **/
|
---|
| 3186 | Inflate.prototype.onData = function (chunk) {
|
---|
| 3187 | this.chunks.push(chunk);
|
---|
| 3188 | };
|
---|
| 3189 |
|
---|
| 3190 |
|
---|
| 3191 | /**
|
---|
| 3192 | * Inflate#onEnd(status) -> Void
|
---|
| 3193 | * - status (Number): inflate status. 0 (Z_OK) on success,
|
---|
| 3194 | * other if not.
|
---|
| 3195 | *
|
---|
| 3196 | * Called either after you tell inflate that the input stream is
|
---|
| 3197 | * complete (Z_FINISH) or should be flushed (Z_SYNC_FLUSH)
|
---|
| 3198 | * or if an error happened. By default - join collected chunks,
|
---|
| 3199 | * free memory and fill `results` / `err` properties.
|
---|
| 3200 | **/
|
---|
| 3201 | Inflate.prototype.onEnd = function (status) {
|
---|
| 3202 | // On success - join
|
---|
| 3203 | if (status === c.Z_OK) {
|
---|
| 3204 | if (this.options.to === 'string') {
|
---|
| 3205 | // Glue & convert here, until we teach pako to send
|
---|
| 3206 | // utf8 aligned strings to onData
|
---|
| 3207 | this.result = this.chunks.join('');
|
---|
| 3208 | } else {
|
---|
| 3209 | this.result = utils.flattenChunks(this.chunks);
|
---|
| 3210 | }
|
---|
| 3211 | }
|
---|
| 3212 | this.chunks = [];
|
---|
| 3213 | this.err = status;
|
---|
| 3214 | this.msg = this.strm.msg;
|
---|
| 3215 | };
|
---|
| 3216 |
|
---|
| 3217 |
|
---|
| 3218 | /**
|
---|
| 3219 | * inflate(data[, options]) -> Uint8Array|Array|String
|
---|
| 3220 | * - data (Uint8Array|Array|String): input data to decompress.
|
---|
| 3221 | * - options (Object): zlib inflate options.
|
---|
| 3222 | *
|
---|
| 3223 | * Decompress `data` with inflate/ungzip and `options`. Autodetect
|
---|
| 3224 | * format via wrapper header by default. That's why we don't provide
|
---|
| 3225 | * separate `ungzip` method.
|
---|
| 3226 | *
|
---|
| 3227 | * Supported options are:
|
---|
| 3228 | *
|
---|
| 3229 | * - windowBits
|
---|
| 3230 | *
|
---|
| 3231 | * [http://zlib.net/manual.html#Advanced](http://zlib.net/manual.html#Advanced)
|
---|
| 3232 | * for more information.
|
---|
| 3233 | *
|
---|
| 3234 | * Sugar (options):
|
---|
| 3235 | *
|
---|
| 3236 | * - `raw` (Boolean) - say that we work with raw stream, if you don't wish to specify
|
---|
| 3237 | * negative windowBits implicitly.
|
---|
| 3238 | * - `to` (String) - if equal to 'string', then result will be converted
|
---|
| 3239 | * from utf8 to utf16 (javascript) string. When string output requested,
|
---|
| 3240 | * chunk length can differ from `chunkSize`, depending on content.
|
---|
| 3241 | *
|
---|
| 3242 | *
|
---|
| 3243 | * ##### Example:
|
---|
| 3244 | *
|
---|
| 3245 | * ```javascript
|
---|
| 3246 | * var pako = require('pako')
|
---|
| 3247 | * , input = pako.deflate([1,2,3,4,5,6,7,8,9])
|
---|
| 3248 | * , output;
|
---|
| 3249 | *
|
---|
| 3250 | * try {
|
---|
| 3251 | * output = pako.inflate(input);
|
---|
| 3252 | * } catch (err)
|
---|
| 3253 | * console.log(err);
|
---|
| 3254 | * }
|
---|
| 3255 | * ```
|
---|
| 3256 | **/
|
---|
| 3257 | function inflate(input, options) {
|
---|
| 3258 | var inflator = new Inflate(options);
|
---|
| 3259 |
|
---|
| 3260 | inflator.push(input, true);
|
---|
| 3261 |
|
---|
| 3262 | // That will never happens, if you don't cheat with options :)
|
---|
| 3263 | if (inflator.err) { throw inflator.msg || msg[inflator.err]; }
|
---|
| 3264 |
|
---|
| 3265 | return inflator.result;
|
---|
| 3266 | }
|
---|
| 3267 |
|
---|
| 3268 |
|
---|
| 3269 | /**
|
---|
| 3270 | * inflateRaw(data[, options]) -> Uint8Array|Array|String
|
---|
| 3271 | * - data (Uint8Array|Array|String): input data to decompress.
|
---|
| 3272 | * - options (Object): zlib inflate options.
|
---|
| 3273 | *
|
---|
| 3274 | * The same as [[inflate]], but creates raw data, without wrapper
|
---|
| 3275 | * (header and adler32 crc).
|
---|
| 3276 | **/
|
---|
| 3277 | function inflateRaw(input, options) {
|
---|
| 3278 | options = options || {};
|
---|
| 3279 | options.raw = true;
|
---|
| 3280 | return inflate(input, options);
|
---|
| 3281 | }
|
---|
| 3282 |
|
---|
| 3283 |
|
---|
| 3284 | /**
|
---|
| 3285 | * ungzip(data[, options]) -> Uint8Array|Array|String
|
---|
| 3286 | * - data (Uint8Array|Array|String): input data to decompress.
|
---|
| 3287 | * - options (Object): zlib inflate options.
|
---|
| 3288 | *
|
---|
| 3289 | * Just shortcut to [[inflate]], because it autodetects format
|
---|
| 3290 | * by header.content. Done for convenience.
|
---|
| 3291 | **/
|
---|
| 3292 |
|
---|
| 3293 |
|
---|
| 3294 | exports.Inflate = Inflate;
|
---|
| 3295 | exports.inflate = inflate;
|
---|
| 3296 | exports.inflateRaw = inflateRaw;
|
---|
| 3297 | exports.ungzip = inflate;
|
---|
| 3298 |
|
---|
| 3299 | },{"./utils/common":1,"./utils/strings":2,"./zlib/constants":4,"./zlib/gzheader":6,"./zlib/inflate":8,"./zlib/messages":10,"./zlib/zstream":11}]},{},[])("/lib/inflate.js")
|
---|
| 3300 | });
|
---|