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,
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407 | Z_DEFAULT_STRATEGY: 0,
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408 |
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409 | /* Possible values of the data_type field (though see inflate()) */
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410 | Z_BINARY: 0,
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411 | Z_TEXT: 1,
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412 | //Z_ASCII: 1, // = Z_TEXT (deprecated)
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413 | Z_UNKNOWN: 2,
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414 |
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415 | /* The deflate compression method */
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416 | Z_DEFLATED: 8
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417 | //Z_NULL: null // Use -1 or null inline, depending on var type
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418 | };
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419 |
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420 | },{}],5:[function(require,module,exports){
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421 | 'use strict';
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422 |
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423 | // Note: we can't get significant speed boost here.
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424 | // So write code to minimize size - no pregenerated tables
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425 | // and array tools dependencies.
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426 |
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427 | // (C) 1995-2013 Jean-loup Gailly and Mark Adler
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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 | });
|
---|