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lars |
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/*!
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JSZip - A Javascript class for generating and reading zip files
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<http://stuartk.com/jszip>
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(c) 2009-2014 Stuart Knightley <stuart [at] stuartk.com>
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Dual licenced under the MIT license or GPLv3. See https://raw.github.com/Stuk/jszip/master/LICENSE.markdown.
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JSZip uses the library pako released under the MIT license :
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https://github.com/nodeca/pako/blob/master/LICENSE
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*/
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!function(e){if("object"==typeof exports&&"undefined"!=typeof module)module.exports=e();else if("function"==typeof define&&define.amd)define([],e);else{var f;"undefined"!=typeof window?f=window:"undefined"!=typeof global?f=global:"undefined"!=typeof self&&(f=self),f.JSZip=e()}}(function(){var define,module,exports;return (function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);throw new Error("Cannot find module '"+o+"'")}var f=n[o]={exports:{}};t[o][0].call(f.exports,function(e){var n=t[o][1][e];return s(n?n:e)},f,f.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(_dereq_,module,exports){
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'use strict';
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// private property
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var _keyStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
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// public method for encoding
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exports.encode = function(input, utf8) {
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var output = "";
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var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
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var i = 0;
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while (i < input.length) {
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chr1 = input.charCodeAt(i++);
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chr2 = input.charCodeAt(i++);
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chr3 = input.charCodeAt(i++);
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enc1 = chr1 >> 2;
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enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
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enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
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enc4 = chr3 & 63;
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if (isNaN(chr2)) {
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enc3 = enc4 = 64;
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}
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else if (isNaN(chr3)) {
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enc4 = 64;
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}
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output = output + _keyStr.charAt(enc1) + _keyStr.charAt(enc2) + _keyStr.charAt(enc3) + _keyStr.charAt(enc4);
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}
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return output;
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};
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// public method for decoding
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exports.decode = function(input, utf8) {
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var output = "";
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var chr1, chr2, chr3;
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var enc1, enc2, enc3, enc4;
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var i = 0;
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input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");
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while (i < input.length) {
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enc1 = _keyStr.indexOf(input.charAt(i++));
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enc2 = _keyStr.indexOf(input.charAt(i++));
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enc3 = _keyStr.indexOf(input.charAt(i++));
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enc4 = _keyStr.indexOf(input.charAt(i++));
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64 |
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chr1 = (enc1 << 2) | (enc2 >> 4);
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chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
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chr3 = ((enc3 & 3) << 6) | enc4;
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output = output + String.fromCharCode(chr1);
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if (enc3 != 64) {
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output = output + String.fromCharCode(chr2);
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}
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if (enc4 != 64) {
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output = output + String.fromCharCode(chr3);
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}
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}
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return output;
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};
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},{}],2:[function(_dereq_,module,exports){
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'use strict';
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function CompressedObject() {
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this.compressedSize = 0;
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this.uncompressedSize = 0;
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this.crc32 = 0;
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this.compressionMethod = null;
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this.compressedContent = null;
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}
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CompressedObject.prototype = {
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/**
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* Return the decompressed content in an unspecified format.
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* The format will depend on the decompressor.
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* @return {Object} the decompressed content.
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*/
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getContent: function() {
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return null; // see implementation
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},
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/**
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* Return the compressed content in an unspecified format.
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* The format will depend on the compressed conten source.
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* @return {Object} the compressed content.
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*/
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getCompressedContent: function() {
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return null; // see implementation
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}
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};
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module.exports = CompressedObject;
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},{}],3:[function(_dereq_,module,exports){
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'use strict';
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exports.STORE = {
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magic: "\x00\x00",
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compress: function(content, compressionOptions) {
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return content; // no compression
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},
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uncompress: function(content) {
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return content; // no compression
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},
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compressInputType: null,
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uncompressInputType: null
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};
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exports.DEFLATE = _dereq_('./flate');
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},{"./flate":8}],4:[function(_dereq_,module,exports){
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'use strict';
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var utils = _dereq_('./utils');
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var table = [
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0x00000000, 0x77073096, 0xEE0E612C, 0x990951BA,
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0x076DC419, 0x706AF48F, 0xE963A535, 0x9E6495A3,
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0x0EDB8832, 0x79DCB8A4, 0xE0D5E91E, 0x97D2D988,
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0x09B64C2B, 0x7EB17CBD, 0xE7B82D07, 0x90BF1D91,
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0x1DB71064, 0x6AB020F2, 0xF3B97148, 0x84BE41DE,
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0x1ADAD47D, 0x6DDDE4EB, 0xF4D4B551, 0x83D385C7,
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0x136C9856, 0x646BA8C0, 0xFD62F97A, 0x8A65C9EC,
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0x14015C4F, 0x63066CD9, 0xFA0F3D63, 0x8D080DF5,
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0x3B6E20C8, 0x4C69105E, 0xD56041E4, 0xA2677172,
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0x3C03E4D1, 0x4B04D447, 0xD20D85FD, 0xA50AB56B,
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0x35B5A8FA, 0x42B2986C, 0xDBBBC9D6, 0xACBCF940,
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0x32D86CE3, 0x45DF5C75, 0xDCD60DCF, 0xABD13D59,
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0x26D930AC, 0x51DE003A, 0xC8D75180, 0xBFD06116,
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0x21B4F4B5, 0x56B3C423, 0xCFBA9599, 0xB8BDA50F,
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0x2802B89E, 0x5F058808, 0xC60CD9B2, 0xB10BE924,
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0x2F6F7C87, 0x58684C11, 0xC1611DAB, 0xB6662D3D,
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0x76DC4190, 0x01DB7106, 0x98D220BC, 0xEFD5102A,
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0x71B18589, 0x06B6B51F, 0x9FBFE4A5, 0xE8B8D433,
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0x7807C9A2, 0x0F00F934, 0x9609A88E, 0xE10E9818,
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0x7F6A0DBB, 0x086D3D2D, 0x91646C97, 0xE6635C01,
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0x6B6B51F4, 0x1C6C6162, 0x856530D8, 0xF262004E,
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0x6C0695ED, 0x1B01A57B, 0x8208F4C1, 0xF50FC457,
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0x65B0D9C6, 0x12B7E950, 0x8BBEB8EA, 0xFCB9887C,
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0x62DD1DDF, 0x15DA2D49, 0x8CD37CF3, 0xFBD44C65,
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0x4DB26158, 0x3AB551CE, 0xA3BC0074, 0xD4BB30E2,
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0x4ADFA541, 0x3DD895D7, 0xA4D1C46D, 0xD3D6F4FB,
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0x4369E96A, 0x346ED9FC, 0xAD678846, 0xDA60B8D0,
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0x44042D73, 0x33031DE5, 0xAA0A4C5F, 0xDD0D7CC9,
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0x5005713C, 0x270241AA, 0xBE0B1010, 0xC90C2086,
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0x5768B525, 0x206F85B3, 0xB966D409, 0xCE61E49F,
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0x5EDEF90E, 0x29D9C998, 0xB0D09822, 0xC7D7A8B4,
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0x59B33D17, 0x2EB40D81, 0xB7BD5C3B, 0xC0BA6CAD,
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0xEDB88320, 0x9ABFB3B6, 0x03B6E20C, 0x74B1D29A,
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0xEAD54739, 0x9DD277AF, 0x04DB2615, 0x73DC1683,
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0xE3630B12, 0x94643B84, 0x0D6D6A3E, 0x7A6A5AA8,
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0xE40ECF0B, 0x9309FF9D, 0x0A00AE27, 0x7D079EB1,
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0xF00F9344, 0x8708A3D2, 0x1E01F268, 0x6906C2FE,
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0xF762575D, 0x806567CB, 0x196C3671, 0x6E6B06E7,
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0xFED41B76, 0x89D32BE0, 0x10DA7A5A, 0x67DD4ACC,
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0xF9B9DF6F, 0x8EBEEFF9, 0x17B7BE43, 0x60B08ED5,
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0xD6D6A3E8, 0xA1D1937E, 0x38D8C2C4, 0x4FDFF252,
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0xD1BB67F1, 0xA6BC5767, 0x3FB506DD, 0x48B2364B,
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0xD80D2BDA, 0xAF0A1B4C, 0x36034AF6, 0x41047A60,
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0xDF60EFC3, 0xA867DF55, 0x316E8EEF, 0x4669BE79,
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0xCB61B38C, 0xBC66831A, 0x256FD2A0, 0x5268E236,
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0xCC0C7795, 0xBB0B4703, 0x220216B9, 0x5505262F,
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0xC5BA3BBE, 0xB2BD0B28, 0x2BB45A92, 0x5CB36A04,
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0xC2D7FFA7, 0xB5D0CF31, 0x2CD99E8B, 0x5BDEAE1D,
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0x9B64C2B0, 0xEC63F226, 0x756AA39C, 0x026D930A,
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0x9C0906A9, 0xEB0E363F, 0x72076785, 0x05005713,
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0x95BF4A82, 0xE2B87A14, 0x7BB12BAE, 0x0CB61B38,
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0x92D28E9B, 0xE5D5BE0D, 0x7CDCEFB7, 0x0BDBDF21,
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0x86D3D2D4, 0xF1D4E242, 0x68DDB3F8, 0x1FDA836E,
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0x81BE16CD, 0xF6B9265B, 0x6FB077E1, 0x18B74777,
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0x88085AE6, 0xFF0F6A70, 0x66063BCA, 0x11010B5C,
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0x8F659EFF, 0xF862AE69, 0x616BFFD3, 0x166CCF45,
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0xA00AE278, 0xD70DD2EE, 0x4E048354, 0x3903B3C2,
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0xA7672661, 0xD06016F7, 0x4969474D, 0x3E6E77DB,
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0xAED16A4A, 0xD9D65ADC, 0x40DF0B66, 0x37D83BF0,
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0xA9BCAE53, 0xDEBB9EC5, 0x47B2CF7F, 0x30B5FFE9,
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0xBDBDF21C, 0xCABAC28A, 0x53B39330, 0x24B4A3A6,
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0xBAD03605, 0xCDD70693, 0x54DE5729, 0x23D967BF,
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0xB3667A2E, 0xC4614AB8, 0x5D681B02, 0x2A6F2B94,
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0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B, 0x2D02EF8D
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];
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/**
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*
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* Javascript crc32
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* http://www.webtoolkit.info/
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*
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*/
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module.exports = function crc32(input, crc) {
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if (typeof input === "undefined" || !input.length) {
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return 0;
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}
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211 |
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var isArray = utils.getTypeOf(input) !== "string";
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213 |
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if (typeof(crc) == "undefined") {
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crc = 0;
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}
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217 |
var x = 0;
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var y = 0;
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var b = 0;
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220 |
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crc = crc ^ (-1);
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for (var i = 0, iTop = input.length; i < iTop; i++) {
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b = isArray ? input[i] : input.charCodeAt(i);
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y = (crc ^ b) & 0xFF;
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x = table[y];
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crc = (crc >>> 8) ^ x;
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}
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return crc ^ (-1);
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};
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// vim: set shiftwidth=4 softtabstop=4:
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232 |
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},{"./utils":21}],5:[function(_dereq_,module,exports){
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'use strict';
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235 |
var utils = _dereq_('./utils');
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236 |
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237 |
function DataReader(data) {
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238 |
this.data = null; // type : see implementation
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239 |
this.length = 0;
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240 |
this.index = 0;
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}
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242 |
DataReader.prototype = {
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243 |
/**
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244 |
* Check that the offset will not go too far.
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* @param {string} offset the additional offset to check.
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* @throws {Error} an Error if the offset is out of bounds.
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247 |
*/
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248 |
checkOffset: function(offset) {
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249 |
this.checkIndex(this.index + offset);
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},
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251 |
/**
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252 |
* Check that the specifed index will not be too far.
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253 |
* @param {string} newIndex the index to check.
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* @throws {Error} an Error if the index is out of bounds.
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255 |
*/
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256 |
checkIndex: function(newIndex) {
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257 |
if (this.length < newIndex || newIndex < 0) {
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258 |
throw new Error("End of data reached (data length = " + this.length + ", asked index = " + (newIndex) + "). Corrupted zip ?");
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259 |
}
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260 |
},
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261 |
/**
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262 |
* Change the index.
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263 |
* @param {number} newIndex The new index.
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264 |
* @throws {Error} if the new index is out of the data.
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265 |
*/
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266 |
setIndex: function(newIndex) {
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267 |
this.checkIndex(newIndex);
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268 |
this.index = newIndex;
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269 |
},
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270 |
/**
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* Skip the next n bytes.
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272 |
* @param {number} n the number of bytes to skip.
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273 |
* @throws {Error} if the new index is out of the data.
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274 |
*/
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275 |
skip: function(n) {
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276 |
this.setIndex(this.index + n);
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},
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278 |
/**
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279 |
* Get the byte at the specified index.
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280 |
* @param {number} i the index to use.
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281 |
* @return {number} a byte.
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282 |
*/
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283 |
byteAt: function(i) {
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284 |
// see implementations
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285 |
},
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286 |
/**
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287 |
* Get the next number with a given byte size.
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288 |
* @param {number} size the number of bytes to read.
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289 |
* @return {number} the corresponding number.
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|
290 |
*/
|
|
|
291 |
readInt: function(size) {
|
|
|
292 |
var result = 0,
|
|
|
293 |
i;
|
|
|
294 |
this.checkOffset(size);
|
|
|
295 |
for (i = this.index + size - 1; i >= this.index; i--) {
|
|
|
296 |
result = (result << 8) + this.byteAt(i);
|
|
|
297 |
}
|
|
|
298 |
this.index += size;
|
|
|
299 |
return result;
|
|
|
300 |
},
|
|
|
301 |
/**
|
|
|
302 |
* Get the next string with a given byte size.
|
|
|
303 |
* @param {number} size the number of bytes to read.
|
|
|
304 |
* @return {string} the corresponding string.
|
|
|
305 |
*/
|
|
|
306 |
readString: function(size) {
|
|
|
307 |
return utils.transformTo("string", this.readData(size));
|
|
|
308 |
},
|
|
|
309 |
/**
|
|
|
310 |
* Get raw data without conversion, <size> bytes.
|
|
|
311 |
* @param {number} size the number of bytes to read.
|
|
|
312 |
* @return {Object} the raw data, implementation specific.
|
|
|
313 |
*/
|
|
|
314 |
readData: function(size) {
|
|
|
315 |
// see implementations
|
|
|
316 |
},
|
|
|
317 |
/**
|
|
|
318 |
* Find the last occurence of a zip signature (4 bytes).
|
|
|
319 |
* @param {string} sig the signature to find.
|
|
|
320 |
* @return {number} the index of the last occurence, -1 if not found.
|
|
|
321 |
*/
|
|
|
322 |
lastIndexOfSignature: function(sig) {
|
|
|
323 |
// see implementations
|
|
|
324 |
},
|
|
|
325 |
/**
|
|
|
326 |
* Get the next date.
|
|
|
327 |
* @return {Date} the date.
|
|
|
328 |
*/
|
|
|
329 |
readDate: function() {
|
|
|
330 |
var dostime = this.readInt(4);
|
|
|
331 |
return new Date(
|
|
|
332 |
((dostime >> 25) & 0x7f) + 1980, // year
|
|
|
333 |
((dostime >> 21) & 0x0f) - 1, // month
|
|
|
334 |
(dostime >> 16) & 0x1f, // day
|
|
|
335 |
(dostime >> 11) & 0x1f, // hour
|
|
|
336 |
(dostime >> 5) & 0x3f, // minute
|
|
|
337 |
(dostime & 0x1f) << 1); // second
|
|
|
338 |
}
|
|
|
339 |
};
|
|
|
340 |
module.exports = DataReader;
|
|
|
341 |
|
|
|
342 |
},{"./utils":21}],6:[function(_dereq_,module,exports){
|
|
|
343 |
'use strict';
|
|
|
344 |
exports.base64 = false;
|
|
|
345 |
exports.binary = false;
|
|
|
346 |
exports.dir = false;
|
|
|
347 |
exports.createFolders = false;
|
|
|
348 |
exports.date = null;
|
|
|
349 |
exports.compression = null;
|
|
|
350 |
exports.compressionOptions = null;
|
|
|
351 |
exports.comment = null;
|
|
|
352 |
exports.unixPermissions = null;
|
|
|
353 |
exports.dosPermissions = null;
|
|
|
354 |
|
|
|
355 |
},{}],7:[function(_dereq_,module,exports){
|
|
|
356 |
'use strict';
|
|
|
357 |
var utils = _dereq_('./utils');
|
|
|
358 |
|
|
|
359 |
/**
|
|
|
360 |
* @deprecated
|
|
|
361 |
* This function will be removed in a future version without replacement.
|
|
|
362 |
*/
|
|
|
363 |
exports.string2binary = function(str) {
|
|
|
364 |
return utils.string2binary(str);
|
|
|
365 |
};
|
|
|
366 |
|
|
|
367 |
/**
|
|
|
368 |
* @deprecated
|
|
|
369 |
* This function will be removed in a future version without replacement.
|
|
|
370 |
*/
|
|
|
371 |
exports.string2Uint8Array = function(str) {
|
|
|
372 |
return utils.transformTo("uint8array", str);
|
|
|
373 |
};
|
|
|
374 |
|
|
|
375 |
/**
|
|
|
376 |
* @deprecated
|
|
|
377 |
* This function will be removed in a future version without replacement.
|
|
|
378 |
*/
|
|
|
379 |
exports.uint8Array2String = function(array) {
|
|
|
380 |
return utils.transformTo("string", array);
|
|
|
381 |
};
|
|
|
382 |
|
|
|
383 |
/**
|
|
|
384 |
* @deprecated
|
|
|
385 |
* This function will be removed in a future version without replacement.
|
|
|
386 |
*/
|
|
|
387 |
exports.string2Blob = function(str) {
|
|
|
388 |
var buffer = utils.transformTo("arraybuffer", str);
|
|
|
389 |
return utils.arrayBuffer2Blob(buffer);
|
|
|
390 |
};
|
|
|
391 |
|
|
|
392 |
/**
|
|
|
393 |
* @deprecated
|
|
|
394 |
* This function will be removed in a future version without replacement.
|
|
|
395 |
*/
|
|
|
396 |
exports.arrayBuffer2Blob = function(buffer) {
|
|
|
397 |
return utils.arrayBuffer2Blob(buffer);
|
|
|
398 |
};
|
|
|
399 |
|
|
|
400 |
/**
|
|
|
401 |
* @deprecated
|
|
|
402 |
* This function will be removed in a future version without replacement.
|
|
|
403 |
*/
|
|
|
404 |
exports.transformTo = function(outputType, input) {
|
|
|
405 |
return utils.transformTo(outputType, input);
|
|
|
406 |
};
|
|
|
407 |
|
|
|
408 |
/**
|
|
|
409 |
* @deprecated
|
|
|
410 |
* This function will be removed in a future version without replacement.
|
|
|
411 |
*/
|
|
|
412 |
exports.getTypeOf = function(input) {
|
|
|
413 |
return utils.getTypeOf(input);
|
|
|
414 |
};
|
|
|
415 |
|
|
|
416 |
/**
|
|
|
417 |
* @deprecated
|
|
|
418 |
* This function will be removed in a future version without replacement.
|
|
|
419 |
*/
|
|
|
420 |
exports.checkSupport = function(type) {
|
|
|
421 |
return utils.checkSupport(type);
|
|
|
422 |
};
|
|
|
423 |
|
|
|
424 |
/**
|
|
|
425 |
* @deprecated
|
|
|
426 |
* This value will be removed in a future version without replacement.
|
|
|
427 |
*/
|
|
|
428 |
exports.MAX_VALUE_16BITS = utils.MAX_VALUE_16BITS;
|
|
|
429 |
|
|
|
430 |
/**
|
|
|
431 |
* @deprecated
|
|
|
432 |
* This value will be removed in a future version without replacement.
|
|
|
433 |
*/
|
|
|
434 |
exports.MAX_VALUE_32BITS = utils.MAX_VALUE_32BITS;
|
|
|
435 |
|
|
|
436 |
|
|
|
437 |
/**
|
|
|
438 |
* @deprecated
|
|
|
439 |
* This function will be removed in a future version without replacement.
|
|
|
440 |
*/
|
|
|
441 |
exports.pretty = function(str) {
|
|
|
442 |
return utils.pretty(str);
|
|
|
443 |
};
|
|
|
444 |
|
|
|
445 |
/**
|
|
|
446 |
* @deprecated
|
|
|
447 |
* This function will be removed in a future version without replacement.
|
|
|
448 |
*/
|
|
|
449 |
exports.findCompression = function(compressionMethod) {
|
|
|
450 |
return utils.findCompression(compressionMethod);
|
|
|
451 |
};
|
|
|
452 |
|
|
|
453 |
/**
|
|
|
454 |
* @deprecated
|
|
|
455 |
* This function will be removed in a future version without replacement.
|
|
|
456 |
*/
|
|
|
457 |
exports.isRegExp = function (object) {
|
|
|
458 |
return utils.isRegExp(object);
|
|
|
459 |
};
|
|
|
460 |
|
|
|
461 |
|
|
|
462 |
},{"./utils":21}],8:[function(_dereq_,module,exports){
|
|
|
463 |
'use strict';
|
|
|
464 |
var USE_TYPEDARRAY = (typeof Uint8Array !== 'undefined') && (typeof Uint16Array !== 'undefined') && (typeof Uint32Array !== 'undefined');
|
|
|
465 |
|
|
|
466 |
var pako = _dereq_("pako");
|
|
|
467 |
exports.uncompressInputType = USE_TYPEDARRAY ? "uint8array" : "array";
|
|
|
468 |
exports.compressInputType = USE_TYPEDARRAY ? "uint8array" : "array";
|
|
|
469 |
|
|
|
470 |
exports.magic = "\x08\x00";
|
|
|
471 |
exports.compress = function(input, compressionOptions) {
|
|
|
472 |
return pako.deflateRaw(input, {
|
|
|
473 |
level : compressionOptions.level || -1 // default compression
|
|
|
474 |
});
|
|
|
475 |
};
|
|
|
476 |
exports.uncompress = function(input) {
|
|
|
477 |
return pako.inflateRaw(input);
|
|
|
478 |
};
|
|
|
479 |
|
|
|
480 |
},{"pako":24}],9:[function(_dereq_,module,exports){
|
|
|
481 |
'use strict';
|
|
|
482 |
|
|
|
483 |
var base64 = _dereq_('./base64');
|
|
|
484 |
|
|
|
485 |
/**
|
|
|
486 |
Usage:
|
|
|
487 |
zip = new JSZip();
|
|
|
488 |
zip.file("hello.txt", "Hello, World!").file("tempfile", "nothing");
|
|
|
489 |
zip.folder("images").file("smile.gif", base64Data, {base64: true});
|
|
|
490 |
zip.file("Xmas.txt", "Ho ho ho !", {date : new Date("December 25, 2007 00:00:01")});
|
|
|
491 |
zip.remove("tempfile");
|
|
|
492 |
|
|
|
493 |
base64zip = zip.generate();
|
|
|
494 |
|
|
|
495 |
**/
|
|
|
496 |
|
|
|
497 |
/**
|
|
|
498 |
* Representation a of zip file in js
|
|
|
499 |
* @constructor
|
|
|
500 |
* @param {String=|ArrayBuffer=|Uint8Array=} data the data to load, if any (optional).
|
|
|
501 |
* @param {Object=} options the options for creating this objects (optional).
|
|
|
502 |
*/
|
|
|
503 |
function JSZip(data, options) {
|
|
|
504 |
// if this constructor is used without `new`, it adds `new` before itself:
|
|
|
505 |
if(!(this instanceof JSZip)) return new JSZip(data, options);
|
|
|
506 |
|
|
|
507 |
// object containing the files :
|
|
|
508 |
// {
|
|
|
509 |
// "folder/" : {...},
|
|
|
510 |
// "folder/data.txt" : {...}
|
|
|
511 |
// }
|
|
|
512 |
this.files = {};
|
|
|
513 |
|
|
|
514 |
this.comment = null;
|
|
|
515 |
|
|
|
516 |
// Where we are in the hierarchy
|
|
|
517 |
this.root = "";
|
|
|
518 |
if (data) {
|
|
|
519 |
this.load(data, options);
|
|
|
520 |
}
|
|
|
521 |
this.clone = function() {
|
|
|
522 |
var newObj = new JSZip();
|
|
|
523 |
for (var i in this) {
|
|
|
524 |
if (typeof this[i] !== "function") {
|
|
|
525 |
newObj[i] = this[i];
|
|
|
526 |
}
|
|
|
527 |
}
|
|
|
528 |
return newObj;
|
|
|
529 |
};
|
|
|
530 |
}
|
|
|
531 |
JSZip.prototype = _dereq_('./object');
|
|
|
532 |
JSZip.prototype.load = _dereq_('./load');
|
|
|
533 |
JSZip.support = _dereq_('./support');
|
|
|
534 |
JSZip.defaults = _dereq_('./defaults');
|
|
|
535 |
|
|
|
536 |
/**
|
|
|
537 |
* @deprecated
|
|
|
538 |
* This namespace will be removed in a future version without replacement.
|
|
|
539 |
*/
|
|
|
540 |
JSZip.utils = _dereq_('./deprecatedPublicUtils');
|
|
|
541 |
|
|
|
542 |
JSZip.base64 = {
|
|
|
543 |
/**
|
|
|
544 |
* @deprecated
|
|
|
545 |
* This method will be removed in a future version without replacement.
|
|
|
546 |
*/
|
|
|
547 |
encode : function(input) {
|
|
|
548 |
return base64.encode(input);
|
|
|
549 |
},
|
|
|
550 |
/**
|
|
|
551 |
* @deprecated
|
|
|
552 |
* This method will be removed in a future version without replacement.
|
|
|
553 |
*/
|
|
|
554 |
decode : function(input) {
|
|
|
555 |
return base64.decode(input);
|
|
|
556 |
}
|
|
|
557 |
};
|
|
|
558 |
JSZip.compressions = _dereq_('./compressions');
|
|
|
559 |
module.exports = JSZip;
|
|
|
560 |
|
|
|
561 |
},{"./base64":1,"./compressions":3,"./defaults":6,"./deprecatedPublicUtils":7,"./load":10,"./object":13,"./support":17}],10:[function(_dereq_,module,exports){
|
|
|
562 |
'use strict';
|
|
|
563 |
var base64 = _dereq_('./base64');
|
|
|
564 |
var ZipEntries = _dereq_('./zipEntries');
|
|
|
565 |
module.exports = function(data, options) {
|
|
|
566 |
var files, zipEntries, i, input;
|
|
|
567 |
options = options || {};
|
|
|
568 |
if (options.base64) {
|
|
|
569 |
data = base64.decode(data);
|
|
|
570 |
}
|
|
|
571 |
|
|
|
572 |
zipEntries = new ZipEntries(data, options);
|
|
|
573 |
files = zipEntries.files;
|
|
|
574 |
for (i = 0; i < files.length; i++) {
|
|
|
575 |
input = files[i];
|
|
|
576 |
this.file(input.fileName, input.decompressed, {
|
|
|
577 |
binary: true,
|
|
|
578 |
optimizedBinaryString: true,
|
|
|
579 |
date: input.date,
|
|
|
580 |
dir: input.dir,
|
|
|
581 |
comment : input.fileComment.length ? input.fileComment : null,
|
|
|
582 |
unixPermissions : input.unixPermissions,
|
|
|
583 |
dosPermissions : input.dosPermissions,
|
|
|
584 |
createFolders: options.createFolders
|
|
|
585 |
});
|
|
|
586 |
}
|
|
|
587 |
if (zipEntries.zipComment.length) {
|
|
|
588 |
this.comment = zipEntries.zipComment;
|
|
|
589 |
}
|
|
|
590 |
|
|
|
591 |
return this;
|
|
|
592 |
};
|
|
|
593 |
|
|
|
594 |
},{"./base64":1,"./zipEntries":22}],11:[function(_dereq_,module,exports){
|
|
|
595 |
(function (Buffer){
|
|
|
596 |
'use strict';
|
|
|
597 |
module.exports = function(data, encoding){
|
|
|
598 |
return new Buffer(data, encoding);
|
|
|
599 |
};
|
|
|
600 |
module.exports.test = function(b){
|
|
|
601 |
return Buffer.isBuffer(b);
|
|
|
602 |
};
|
|
|
603 |
|
|
|
604 |
}).call(this,(typeof Buffer !== "undefined" ? Buffer : undefined))
|
|
|
605 |
},{}],12:[function(_dereq_,module,exports){
|
|
|
606 |
'use strict';
|
|
|
607 |
var Uint8ArrayReader = _dereq_('./uint8ArrayReader');
|
|
|
608 |
|
|
|
609 |
function NodeBufferReader(data) {
|
|
|
610 |
this.data = data;
|
|
|
611 |
this.length = this.data.length;
|
|
|
612 |
this.index = 0;
|
|
|
613 |
}
|
|
|
614 |
NodeBufferReader.prototype = new Uint8ArrayReader();
|
|
|
615 |
|
|
|
616 |
/**
|
|
|
617 |
* @see DataReader.readData
|
|
|
618 |
*/
|
|
|
619 |
NodeBufferReader.prototype.readData = function(size) {
|
|
|
620 |
this.checkOffset(size);
|
|
|
621 |
var result = this.data.slice(this.index, this.index + size);
|
|
|
622 |
this.index += size;
|
|
|
623 |
return result;
|
|
|
624 |
};
|
|
|
625 |
module.exports = NodeBufferReader;
|
|
|
626 |
|
|
|
627 |
},{"./uint8ArrayReader":18}],13:[function(_dereq_,module,exports){
|
|
|
628 |
'use strict';
|
|
|
629 |
var support = _dereq_('./support');
|
|
|
630 |
var utils = _dereq_('./utils');
|
|
|
631 |
var crc32 = _dereq_('./crc32');
|
|
|
632 |
var signature = _dereq_('./signature');
|
|
|
633 |
var defaults = _dereq_('./defaults');
|
|
|
634 |
var base64 = _dereq_('./base64');
|
|
|
635 |
var compressions = _dereq_('./compressions');
|
|
|
636 |
var CompressedObject = _dereq_('./compressedObject');
|
|
|
637 |
var nodeBuffer = _dereq_('./nodeBuffer');
|
|
|
638 |
var utf8 = _dereq_('./utf8');
|
|
|
639 |
var StringWriter = _dereq_('./stringWriter');
|
|
|
640 |
var Uint8ArrayWriter = _dereq_('./uint8ArrayWriter');
|
|
|
641 |
|
|
|
642 |
/**
|
|
|
643 |
* Returns the raw data of a ZipObject, decompress the content if necessary.
|
|
|
644 |
* @param {ZipObject} file the file to use.
|
|
|
645 |
* @return {String|ArrayBuffer|Uint8Array|Buffer} the data.
|
|
|
646 |
*/
|
|
|
647 |
var getRawData = function(file) {
|
|
|
648 |
if (file._data instanceof CompressedObject) {
|
|
|
649 |
file._data = file._data.getContent();
|
|
|
650 |
file.options.binary = true;
|
|
|
651 |
file.options.base64 = false;
|
|
|
652 |
|
|
|
653 |
if (utils.getTypeOf(file._data) === "uint8array") {
|
|
|
654 |
var copy = file._data;
|
|
|
655 |
// when reading an arraybuffer, the CompressedObject mechanism will keep it and subarray() a Uint8Array.
|
|
|
656 |
// if we request a file in the same format, we might get the same Uint8Array or its ArrayBuffer (the original zip file).
|
|
|
657 |
file._data = new Uint8Array(copy.length);
|
|
|
658 |
// with an empty Uint8Array, Opera fails with a "Offset larger than array size"
|
|
|
659 |
if (copy.length !== 0) {
|
|
|
660 |
file._data.set(copy, 0);
|
|
|
661 |
}
|
|
|
662 |
}
|
|
|
663 |
}
|
|
|
664 |
return file._data;
|
|
|
665 |
};
|
|
|
666 |
|
|
|
667 |
/**
|
|
|
668 |
* Returns the data of a ZipObject in a binary form. If the content is an unicode string, encode it.
|
|
|
669 |
* @param {ZipObject} file the file to use.
|
|
|
670 |
* @return {String|ArrayBuffer|Uint8Array|Buffer} the data.
|
|
|
671 |
*/
|
|
|
672 |
var getBinaryData = function(file) {
|
|
|
673 |
var result = getRawData(file),
|
|
|
674 |
type = utils.getTypeOf(result);
|
|
|
675 |
if (type === "string") {
|
|
|
676 |
if (!file.options.binary) {
|
|
|
677 |
// unicode text !
|
|
|
678 |
// unicode string => binary string is a painful process, check if we can avoid it.
|
|
|
679 |
if (support.nodebuffer) {
|
|
|
680 |
return nodeBuffer(result, "utf-8");
|
|
|
681 |
}
|
|
|
682 |
}
|
|
|
683 |
return file.asBinary();
|
|
|
684 |
}
|
|
|
685 |
return result;
|
|
|
686 |
};
|
|
|
687 |
|
|
|
688 |
/**
|
|
|
689 |
* Transform this._data into a string.
|
|
|
690 |
* @param {function} filter a function String -> String, applied if not null on the result.
|
|
|
691 |
* @return {String} the string representing this._data.
|
|
|
692 |
*/
|
|
|
693 |
var dataToString = function(asUTF8) {
|
|
|
694 |
var result = getRawData(this);
|
|
|
695 |
if (result === null || typeof result === "undefined") {
|
|
|
696 |
return "";
|
|
|
697 |
}
|
|
|
698 |
// if the data is a base64 string, we decode it before checking the encoding !
|
|
|
699 |
if (this.options.base64) {
|
|
|
700 |
result = base64.decode(result);
|
|
|
701 |
}
|
|
|
702 |
if (asUTF8 && this.options.binary) {
|
|
|
703 |
// JSZip.prototype.utf8decode supports arrays as input
|
|
|
704 |
// skip to array => string step, utf8decode will do it.
|
|
|
705 |
result = out.utf8decode(result);
|
|
|
706 |
}
|
|
|
707 |
else {
|
|
|
708 |
// no utf8 transformation, do the array => string step.
|
|
|
709 |
result = utils.transformTo("string", result);
|
|
|
710 |
}
|
|
|
711 |
|
|
|
712 |
if (!asUTF8 && !this.options.binary) {
|
|
|
713 |
result = utils.transformTo("string", out.utf8encode(result));
|
|
|
714 |
}
|
|
|
715 |
return result;
|
|
|
716 |
};
|
|
|
717 |
/**
|
|
|
718 |
* A simple object representing a file in the zip file.
|
|
|
719 |
* @constructor
|
|
|
720 |
* @param {string} name the name of the file
|
|
|
721 |
* @param {String|ArrayBuffer|Uint8Array|Buffer} data the data
|
|
|
722 |
* @param {Object} options the options of the file
|
|
|
723 |
*/
|
|
|
724 |
var ZipObject = function(name, data, options) {
|
|
|
725 |
this.name = name;
|
|
|
726 |
this.dir = options.dir;
|
|
|
727 |
this.date = options.date;
|
|
|
728 |
this.comment = options.comment;
|
|
|
729 |
this.unixPermissions = options.unixPermissions;
|
|
|
730 |
this.dosPermissions = options.dosPermissions;
|
|
|
731 |
|
|
|
732 |
this._data = data;
|
|
|
733 |
this.options = options;
|
|
|
734 |
|
|
|
735 |
/*
|
|
|
736 |
* This object contains initial values for dir and date.
|
|
|
737 |
* With them, we can check if the user changed the deprecated metadata in
|
|
|
738 |
* `ZipObject#options` or not.
|
|
|
739 |
*/
|
|
|
740 |
this._initialMetadata = {
|
|
|
741 |
dir : options.dir,
|
|
|
742 |
date : options.date
|
|
|
743 |
};
|
|
|
744 |
};
|
|
|
745 |
|
|
|
746 |
ZipObject.prototype = {
|
|
|
747 |
/**
|
|
|
748 |
* Return the content as UTF8 string.
|
|
|
749 |
* @return {string} the UTF8 string.
|
|
|
750 |
*/
|
|
|
751 |
asText: function() {
|
|
|
752 |
return dataToString.call(this, true);
|
|
|
753 |
},
|
|
|
754 |
/**
|
|
|
755 |
* Returns the binary content.
|
|
|
756 |
* @return {string} the content as binary.
|
|
|
757 |
*/
|
|
|
758 |
asBinary: function() {
|
|
|
759 |
return dataToString.call(this, false);
|
|
|
760 |
},
|
|
|
761 |
/**
|
|
|
762 |
* Returns the content as a nodejs Buffer.
|
|
|
763 |
* @return {Buffer} the content as a Buffer.
|
|
|
764 |
*/
|
|
|
765 |
asNodeBuffer: function() {
|
|
|
766 |
var result = getBinaryData(this);
|
|
|
767 |
return utils.transformTo("nodebuffer", result);
|
|
|
768 |
},
|
|
|
769 |
/**
|
|
|
770 |
* Returns the content as an Uint8Array.
|
|
|
771 |
* @return {Uint8Array} the content as an Uint8Array.
|
|
|
772 |
*/
|
|
|
773 |
asUint8Array: function() {
|
|
|
774 |
var result = getBinaryData(this);
|
|
|
775 |
return utils.transformTo("uint8array", result);
|
|
|
776 |
},
|
|
|
777 |
/**
|
|
|
778 |
* Returns the content as an ArrayBuffer.
|
|
|
779 |
* @return {ArrayBuffer} the content as an ArrayBufer.
|
|
|
780 |
*/
|
|
|
781 |
asArrayBuffer: function() {
|
|
|
782 |
return this.asUint8Array().buffer;
|
|
|
783 |
}
|
|
|
784 |
};
|
|
|
785 |
|
|
|
786 |
/**
|
|
|
787 |
* Transform an integer into a string in hexadecimal.
|
|
|
788 |
* @private
|
|
|
789 |
* @param {number} dec the number to convert.
|
|
|
790 |
* @param {number} bytes the number of bytes to generate.
|
|
|
791 |
* @returns {string} the result.
|
|
|
792 |
*/
|
|
|
793 |
var decToHex = function(dec, bytes) {
|
|
|
794 |
var hex = "",
|
|
|
795 |
i;
|
|
|
796 |
for (i = 0; i < bytes; i++) {
|
|
|
797 |
hex += String.fromCharCode(dec & 0xff);
|
|
|
798 |
dec = dec >>> 8;
|
|
|
799 |
}
|
|
|
800 |
return hex;
|
|
|
801 |
};
|
|
|
802 |
|
|
|
803 |
/**
|
|
|
804 |
* Merge the objects passed as parameters into a new one.
|
|
|
805 |
* @private
|
|
|
806 |
* @param {...Object} var_args All objects to merge.
|
|
|
807 |
* @return {Object} a new object with the data of the others.
|
|
|
808 |
*/
|
|
|
809 |
var extend = function() {
|
|
|
810 |
var result = {}, i, attr;
|
|
|
811 |
for (i = 0; i < arguments.length; i++) { // arguments is not enumerable in some browsers
|
|
|
812 |
for (attr in arguments[i]) {
|
|
|
813 |
if (arguments[i].hasOwnProperty(attr) && typeof result[attr] === "undefined") {
|
|
|
814 |
result[attr] = arguments[i][attr];
|
|
|
815 |
}
|
|
|
816 |
}
|
|
|
817 |
}
|
|
|
818 |
return result;
|
|
|
819 |
};
|
|
|
820 |
|
|
|
821 |
/**
|
|
|
822 |
* Transforms the (incomplete) options from the user into the complete
|
|
|
823 |
* set of options to create a file.
|
|
|
824 |
* @private
|
|
|
825 |
* @param {Object} o the options from the user.
|
|
|
826 |
* @return {Object} the complete set of options.
|
|
|
827 |
*/
|
|
|
828 |
var prepareFileAttrs = function(o) {
|
|
|
829 |
o = o || {};
|
|
|
830 |
if (o.base64 === true && (o.binary === null || o.binary === undefined)) {
|
|
|
831 |
o.binary = true;
|
|
|
832 |
}
|
|
|
833 |
o = extend(o, defaults);
|
|
|
834 |
o.date = o.date || new Date();
|
|
|
835 |
if (o.compression !== null) o.compression = o.compression.toUpperCase();
|
|
|
836 |
|
|
|
837 |
return o;
|
|
|
838 |
};
|
|
|
839 |
|
|
|
840 |
/**
|
|
|
841 |
* Add a file in the current folder.
|
|
|
842 |
* @private
|
|
|
843 |
* @param {string} name the name of the file
|
|
|
844 |
* @param {String|ArrayBuffer|Uint8Array|Buffer} data the data of the file
|
|
|
845 |
* @param {Object} o the options of the file
|
|
|
846 |
* @return {Object} the new file.
|
|
|
847 |
*/
|
|
|
848 |
var fileAdd = function(name, data, o) {
|
|
|
849 |
// be sure sub folders exist
|
|
|
850 |
var dataType = utils.getTypeOf(data),
|
|
|
851 |
parent;
|
|
|
852 |
|
|
|
853 |
o = prepareFileAttrs(o);
|
|
|
854 |
|
|
|
855 |
if (typeof o.unixPermissions === "string") {
|
|
|
856 |
o.unixPermissions = parseInt(o.unixPermissions, 8);
|
|
|
857 |
}
|
|
|
858 |
|
|
|
859 |
// UNX_IFDIR 0040000 see zipinfo.c
|
|
|
860 |
if (o.unixPermissions && (o.unixPermissions & 0x4000)) {
|
|
|
861 |
o.dir = true;
|
|
|
862 |
}
|
|
|
863 |
// Bit 4 Directory
|
|
|
864 |
if (o.dosPermissions && (o.dosPermissions & 0x0010)) {
|
|
|
865 |
o.dir = true;
|
|
|
866 |
}
|
|
|
867 |
|
|
|
868 |
if (o.dir) {
|
|
|
869 |
name = forceTrailingSlash(name);
|
|
|
870 |
}
|
|
|
871 |
|
|
|
872 |
if (o.createFolders && (parent = parentFolder(name))) {
|
|
|
873 |
folderAdd.call(this, parent, true);
|
|
|
874 |
}
|
|
|
875 |
|
|
|
876 |
if (o.dir || data === null || typeof data === "undefined") {
|
|
|
877 |
o.base64 = false;
|
|
|
878 |
o.binary = false;
|
|
|
879 |
data = null;
|
|
|
880 |
dataType = null;
|
|
|
881 |
}
|
|
|
882 |
else if (dataType === "string") {
|
|
|
883 |
if (o.binary && !o.base64) {
|
|
|
884 |
// optimizedBinaryString == true means that the file has already been filtered with a 0xFF mask
|
|
|
885 |
if (o.optimizedBinaryString !== true) {
|
|
|
886 |
// this is a string, not in a base64 format.
|
|
|
887 |
// Be sure that this is a correct "binary string"
|
|
|
888 |
data = utils.string2binary(data);
|
|
|
889 |
}
|
|
|
890 |
}
|
|
|
891 |
}
|
|
|
892 |
else { // arraybuffer, uint8array, ...
|
|
|
893 |
o.base64 = false;
|
|
|
894 |
o.binary = true;
|
|
|
895 |
|
|
|
896 |
if (!dataType && !(data instanceof CompressedObject)) {
|
|
|
897 |
throw new Error("The data of '" + name + "' is in an unsupported format !");
|
|
|
898 |
}
|
|
|
899 |
|
|
|
900 |
// special case : it's way easier to work with Uint8Array than with ArrayBuffer
|
|
|
901 |
if (dataType === "arraybuffer") {
|
|
|
902 |
data = utils.transformTo("uint8array", data);
|
|
|
903 |
}
|
|
|
904 |
}
|
|
|
905 |
|
|
|
906 |
var object = new ZipObject(name, data, o);
|
|
|
907 |
this.files[name] = object;
|
|
|
908 |
return object;
|
|
|
909 |
};
|
|
|
910 |
|
|
|
911 |
/**
|
|
|
912 |
* Find the parent folder of the path.
|
|
|
913 |
* @private
|
|
|
914 |
* @param {string} path the path to use
|
|
|
915 |
* @return {string} the parent folder, or ""
|
|
|
916 |
*/
|
|
|
917 |
var parentFolder = function (path) {
|
|
|
918 |
if (path.slice(-1) == '/') {
|
|
|
919 |
path = path.substring(0, path.length - 1);
|
|
|
920 |
}
|
|
|
921 |
var lastSlash = path.lastIndexOf('/');
|
|
|
922 |
return (lastSlash > 0) ? path.substring(0, lastSlash) : "";
|
|
|
923 |
};
|
|
|
924 |
|
|
|
925 |
|
|
|
926 |
/**
|
|
|
927 |
* Returns the path with a slash at the end.
|
|
|
928 |
* @private
|
|
|
929 |
* @param {String} path the path to check.
|
|
|
930 |
* @return {String} the path with a trailing slash.
|
|
|
931 |
*/
|
|
|
932 |
var forceTrailingSlash = function(path) {
|
|
|
933 |
// Check the name ends with a /
|
|
|
934 |
if (path.slice(-1) != "/") {
|
|
|
935 |
path += "/"; // IE doesn't like substr(-1)
|
|
|
936 |
}
|
|
|
937 |
return path;
|
|
|
938 |
};
|
|
|
939 |
/**
|
|
|
940 |
* Add a (sub) folder in the current folder.
|
|
|
941 |
* @private
|
|
|
942 |
* @param {string} name the folder's name
|
|
|
943 |
* @param {boolean=} [createFolders] If true, automatically create sub
|
|
|
944 |
* folders. Defaults to false.
|
|
|
945 |
* @return {Object} the new folder.
|
|
|
946 |
*/
|
|
|
947 |
var folderAdd = function(name, createFolders) {
|
|
|
948 |
createFolders = (typeof createFolders !== 'undefined') ? createFolders : false;
|
|
|
949 |
|
|
|
950 |
name = forceTrailingSlash(name);
|
|
|
951 |
|
|
|
952 |
// Does this folder already exist?
|
|
|
953 |
if (!this.files[name]) {
|
|
|
954 |
fileAdd.call(this, name, null, {
|
|
|
955 |
dir: true,
|
|
|
956 |
createFolders: createFolders
|
|
|
957 |
});
|
|
|
958 |
}
|
|
|
959 |
return this.files[name];
|
|
|
960 |
};
|
|
|
961 |
|
|
|
962 |
/**
|
|
|
963 |
* Generate a JSZip.CompressedObject for a given zipOject.
|
|
|
964 |
* @param {ZipObject} file the object to read.
|
|
|
965 |
* @param {JSZip.compression} compression the compression to use.
|
|
|
966 |
* @param {Object} compressionOptions the options to use when compressing.
|
|
|
967 |
* @return {JSZip.CompressedObject} the compressed result.
|
|
|
968 |
*/
|
|
|
969 |
var generateCompressedObjectFrom = function(file, compression, compressionOptions) {
|
|
|
970 |
var result = new CompressedObject(),
|
|
|
971 |
content;
|
|
|
972 |
|
|
|
973 |
// the data has not been decompressed, we might reuse things !
|
|
|
974 |
if (file._data instanceof CompressedObject) {
|
|
|
975 |
result.uncompressedSize = file._data.uncompressedSize;
|
|
|
976 |
result.crc32 = file._data.crc32;
|
|
|
977 |
|
|
|
978 |
if (result.uncompressedSize === 0 || file.dir) {
|
|
|
979 |
compression = compressions['STORE'];
|
|
|
980 |
result.compressedContent = "";
|
|
|
981 |
result.crc32 = 0;
|
|
|
982 |
}
|
|
|
983 |
else if (file._data.compressionMethod === compression.magic) {
|
|
|
984 |
result.compressedContent = file._data.getCompressedContent();
|
|
|
985 |
}
|
|
|
986 |
else {
|
|
|
987 |
content = file._data.getContent();
|
|
|
988 |
// need to decompress / recompress
|
|
|
989 |
result.compressedContent = compression.compress(utils.transformTo(compression.compressInputType, content), compressionOptions);
|
|
|
990 |
}
|
|
|
991 |
}
|
|
|
992 |
else {
|
|
|
993 |
// have uncompressed data
|
|
|
994 |
content = getBinaryData(file);
|
|
|
995 |
if (!content || content.length === 0 || file.dir) {
|
|
|
996 |
compression = compressions['STORE'];
|
|
|
997 |
content = "";
|
|
|
998 |
}
|
|
|
999 |
result.uncompressedSize = content.length;
|
|
|
1000 |
result.crc32 = crc32(content);
|
|
|
1001 |
result.compressedContent = compression.compress(utils.transformTo(compression.compressInputType, content), compressionOptions);
|
|
|
1002 |
}
|
|
|
1003 |
|
|
|
1004 |
result.compressedSize = result.compressedContent.length;
|
|
|
1005 |
result.compressionMethod = compression.magic;
|
|
|
1006 |
|
|
|
1007 |
return result;
|
|
|
1008 |
};
|
|
|
1009 |
|
|
|
1010 |
|
|
|
1011 |
|
|
|
1012 |
|
|
|
1013 |
/**
|
|
|
1014 |
* Generate the UNIX part of the external file attributes.
|
|
|
1015 |
* @param {Object} unixPermissions the unix permissions or null.
|
|
|
1016 |
* @param {Boolean} isDir true if the entry is a directory, false otherwise.
|
|
|
1017 |
* @return {Number} a 32 bit integer.
|
|
|
1018 |
*
|
|
|
1019 |
* adapted from http://unix.stackexchange.com/questions/14705/the-zip-formats-external-file-attribute :
|
|
|
1020 |
*
|
|
|
1021 |
* TTTTsstrwxrwxrwx0000000000ADVSHR
|
|
|
1022 |
* ^^^^____________________________ file type, see zipinfo.c (UNX_*)
|
|
|
1023 |
* ^^^_________________________ setuid, setgid, sticky
|
|
|
1024 |
* ^^^^^^^^^________________ permissions
|
|
|
1025 |
* ^^^^^^^^^^______ not used ?
|
|
|
1026 |
* ^^^^^^ DOS attribute bits : Archive, Directory, Volume label, System file, Hidden, Read only
|
|
|
1027 |
*/
|
|
|
1028 |
var generateUnixExternalFileAttr = function (unixPermissions, isDir) {
|
|
|
1029 |
|
|
|
1030 |
var result = unixPermissions;
|
|
|
1031 |
if (!unixPermissions) {
|
|
|
1032 |
// I can't use octal values in strict mode, hence the hexa.
|
|
|
1033 |
// 040775 => 0x41fd
|
|
|
1034 |
// 0100664 => 0x81b4
|
|
|
1035 |
result = isDir ? 0x41fd : 0x81b4;
|
|
|
1036 |
}
|
|
|
1037 |
|
|
|
1038 |
return (result & 0xFFFF) << 16;
|
|
|
1039 |
};
|
|
|
1040 |
|
|
|
1041 |
/**
|
|
|
1042 |
* Generate the DOS part of the external file attributes.
|
|
|
1043 |
* @param {Object} dosPermissions the dos permissions or null.
|
|
|
1044 |
* @param {Boolean} isDir true if the entry is a directory, false otherwise.
|
|
|
1045 |
* @return {Number} a 32 bit integer.
|
|
|
1046 |
*
|
|
|
1047 |
* Bit 0 Read-Only
|
|
|
1048 |
* Bit 1 Hidden
|
|
|
1049 |
* Bit 2 System
|
|
|
1050 |
* Bit 3 Volume Label
|
|
|
1051 |
* Bit 4 Directory
|
|
|
1052 |
* Bit 5 Archive
|
|
|
1053 |
*/
|
|
|
1054 |
var generateDosExternalFileAttr = function (dosPermissions, isDir) {
|
|
|
1055 |
|
|
|
1056 |
// the dir flag is already set for compatibility
|
|
|
1057 |
|
|
|
1058 |
return (dosPermissions || 0) & 0x3F;
|
|
|
1059 |
};
|
|
|
1060 |
|
|
|
1061 |
/**
|
|
|
1062 |
* Generate the various parts used in the construction of the final zip file.
|
|
|
1063 |
* @param {string} name the file name.
|
|
|
1064 |
* @param {ZipObject} file the file content.
|
|
|
1065 |
* @param {JSZip.CompressedObject} compressedObject the compressed object.
|
|
|
1066 |
* @param {number} offset the current offset from the start of the zip file.
|
|
|
1067 |
* @param {String} platform let's pretend we are this platform (change platform dependents fields)
|
|
|
1068 |
* @return {object} the zip parts.
|
|
|
1069 |
*/
|
|
|
1070 |
var generateZipParts = function(name, file, compressedObject, offset, platform) {
|
|
|
1071 |
var data = compressedObject.compressedContent,
|
|
|
1072 |
utfEncodedFileName = utils.transformTo("string", utf8.utf8encode(file.name)),
|
|
|
1073 |
comment = file.comment || "",
|
|
|
1074 |
utfEncodedComment = utils.transformTo("string", utf8.utf8encode(comment)),
|
|
|
1075 |
useUTF8ForFileName = utfEncodedFileName.length !== file.name.length,
|
|
|
1076 |
useUTF8ForComment = utfEncodedComment.length !== comment.length,
|
|
|
1077 |
o = file.options,
|
|
|
1078 |
dosTime,
|
|
|
1079 |
dosDate,
|
|
|
1080 |
extraFields = "",
|
|
|
1081 |
unicodePathExtraField = "",
|
|
|
1082 |
unicodeCommentExtraField = "",
|
|
|
1083 |
dir, date;
|
|
|
1084 |
|
|
|
1085 |
|
|
|
1086 |
// handle the deprecated options.dir
|
|
|
1087 |
if (file._initialMetadata.dir !== file.dir) {
|
|
|
1088 |
dir = file.dir;
|
|
|
1089 |
} else {
|
|
|
1090 |
dir = o.dir;
|
|
|
1091 |
}
|
|
|
1092 |
|
|
|
1093 |
// handle the deprecated options.date
|
|
|
1094 |
if(file._initialMetadata.date !== file.date) {
|
|
|
1095 |
date = file.date;
|
|
|
1096 |
} else {
|
|
|
1097 |
date = o.date;
|
|
|
1098 |
}
|
|
|
1099 |
|
|
|
1100 |
var extFileAttr = 0;
|
|
|
1101 |
var versionMadeBy = 0;
|
|
|
1102 |
if (dir) {
|
|
|
1103 |
// dos or unix, we set the dos dir flag
|
|
|
1104 |
extFileAttr |= 0x00010;
|
|
|
1105 |
}
|
|
|
1106 |
if(platform === "UNIX") {
|
|
|
1107 |
versionMadeBy = 0x031E; // UNIX, version 3.0
|
|
|
1108 |
extFileAttr |= generateUnixExternalFileAttr(file.unixPermissions, dir);
|
|
|
1109 |
} else { // DOS or other, fallback to DOS
|
|
|
1110 |
versionMadeBy = 0x0014; // DOS, version 2.0
|
|
|
1111 |
extFileAttr |= generateDosExternalFileAttr(file.dosPermissions, dir);
|
|
|
1112 |
}
|
|
|
1113 |
|
|
|
1114 |
// date
|
|
|
1115 |
// @see http://www.delorie.com/djgpp/doc/rbinter/it/52/13.html
|
|
|
1116 |
// @see http://www.delorie.com/djgpp/doc/rbinter/it/65/16.html
|
|
|
1117 |
// @see http://www.delorie.com/djgpp/doc/rbinter/it/66/16.html
|
|
|
1118 |
|
|
|
1119 |
dosTime = date.getHours();
|
|
|
1120 |
dosTime = dosTime << 6;
|
|
|
1121 |
dosTime = dosTime | date.getMinutes();
|
|
|
1122 |
dosTime = dosTime << 5;
|
|
|
1123 |
dosTime = dosTime | date.getSeconds() / 2;
|
|
|
1124 |
|
|
|
1125 |
dosDate = date.getFullYear() - 1980;
|
|
|
1126 |
dosDate = dosDate << 4;
|
|
|
1127 |
dosDate = dosDate | (date.getMonth() + 1);
|
|
|
1128 |
dosDate = dosDate << 5;
|
|
|
1129 |
dosDate = dosDate | date.getDate();
|
|
|
1130 |
|
|
|
1131 |
if (useUTF8ForFileName) {
|
|
|
1132 |
// set the unicode path extra field. unzip needs at least one extra
|
|
|
1133 |
// field to correctly handle unicode path, so using the path is as good
|
|
|
1134 |
// as any other information. This could improve the situation with
|
|
|
1135 |
// other archive managers too.
|
|
|
1136 |
// This field is usually used without the utf8 flag, with a non
|
|
|
1137 |
// unicode path in the header (winrar, winzip). This helps (a bit)
|
|
|
1138 |
// with the messy Windows' default compressed folders feature but
|
|
|
1139 |
// breaks on p7zip which doesn't seek the unicode path extra field.
|
|
|
1140 |
// So for now, UTF-8 everywhere !
|
|
|
1141 |
unicodePathExtraField =
|
|
|
1142 |
// Version
|
|
|
1143 |
decToHex(1, 1) +
|
|
|
1144 |
// NameCRC32
|
|
|
1145 |
decToHex(crc32(utfEncodedFileName), 4) +
|
|
|
1146 |
// UnicodeName
|
|
|
1147 |
utfEncodedFileName;
|
|
|
1148 |
|
|
|
1149 |
extraFields +=
|
|
|
1150 |
// Info-ZIP Unicode Path Extra Field
|
|
|
1151 |
"\x75\x70" +
|
|
|
1152 |
// size
|
|
|
1153 |
decToHex(unicodePathExtraField.length, 2) +
|
|
|
1154 |
// content
|
|
|
1155 |
unicodePathExtraField;
|
|
|
1156 |
}
|
|
|
1157 |
|
|
|
1158 |
if(useUTF8ForComment) {
|
|
|
1159 |
|
|
|
1160 |
unicodeCommentExtraField =
|
|
|
1161 |
// Version
|
|
|
1162 |
decToHex(1, 1) +
|
|
|
1163 |
// CommentCRC32
|
|
|
1164 |
decToHex(this.crc32(utfEncodedComment), 4) +
|
|
|
1165 |
// UnicodeName
|
|
|
1166 |
utfEncodedComment;
|
|
|
1167 |
|
|
|
1168 |
extraFields +=
|
|
|
1169 |
// Info-ZIP Unicode Path Extra Field
|
|
|
1170 |
"\x75\x63" +
|
|
|
1171 |
// size
|
|
|
1172 |
decToHex(unicodeCommentExtraField.length, 2) +
|
|
|
1173 |
// content
|
|
|
1174 |
unicodeCommentExtraField;
|
|
|
1175 |
}
|
|
|
1176 |
|
|
|
1177 |
var header = "";
|
|
|
1178 |
|
|
|
1179 |
// version needed to extract
|
|
|
1180 |
header += "\x0A\x00";
|
|
|
1181 |
// general purpose bit flag
|
|
|
1182 |
// set bit 11 if utf8
|
|
|
1183 |
header += (useUTF8ForFileName || useUTF8ForComment) ? "\x00\x08" : "\x00\x00";
|
|
|
1184 |
// compression method
|
|
|
1185 |
header += compressedObject.compressionMethod;
|
|
|
1186 |
// last mod file time
|
|
|
1187 |
header += decToHex(dosTime, 2);
|
|
|
1188 |
// last mod file date
|
|
|
1189 |
header += decToHex(dosDate, 2);
|
|
|
1190 |
// crc-32
|
|
|
1191 |
header += decToHex(compressedObject.crc32, 4);
|
|
|
1192 |
// compressed size
|
|
|
1193 |
header += decToHex(compressedObject.compressedSize, 4);
|
|
|
1194 |
// uncompressed size
|
|
|
1195 |
header += decToHex(compressedObject.uncompressedSize, 4);
|
|
|
1196 |
// file name length
|
|
|
1197 |
header += decToHex(utfEncodedFileName.length, 2);
|
|
|
1198 |
// extra field length
|
|
|
1199 |
header += decToHex(extraFields.length, 2);
|
|
|
1200 |
|
|
|
1201 |
|
|
|
1202 |
var fileRecord = signature.LOCAL_FILE_HEADER + header + utfEncodedFileName + extraFields;
|
|
|
1203 |
|
|
|
1204 |
var dirRecord = signature.CENTRAL_FILE_HEADER +
|
|
|
1205 |
// version made by (00: DOS)
|
|
|
1206 |
decToHex(versionMadeBy, 2) +
|
|
|
1207 |
// file header (common to file and central directory)
|
|
|
1208 |
header +
|
|
|
1209 |
// file comment length
|
|
|
1210 |
decToHex(utfEncodedComment.length, 2) +
|
|
|
1211 |
// disk number start
|
|
|
1212 |
"\x00\x00" +
|
|
|
1213 |
// internal file attributes TODO
|
|
|
1214 |
"\x00\x00" +
|
|
|
1215 |
// external file attributes
|
|
|
1216 |
decToHex(extFileAttr, 4) +
|
|
|
1217 |
// relative offset of local header
|
|
|
1218 |
decToHex(offset, 4) +
|
|
|
1219 |
// file name
|
|
|
1220 |
utfEncodedFileName +
|
|
|
1221 |
// extra field
|
|
|
1222 |
extraFields +
|
|
|
1223 |
// file comment
|
|
|
1224 |
utfEncodedComment;
|
|
|
1225 |
|
|
|
1226 |
return {
|
|
|
1227 |
fileRecord: fileRecord,
|
|
|
1228 |
dirRecord: dirRecord,
|
|
|
1229 |
compressedObject: compressedObject
|
|
|
1230 |
};
|
|
|
1231 |
};
|
|
|
1232 |
|
|
|
1233 |
|
|
|
1234 |
// return the actual prototype of JSZip
|
|
|
1235 |
var out = {
|
|
|
1236 |
/**
|
|
|
1237 |
* Read an existing zip and merge the data in the current JSZip object.
|
|
|
1238 |
* The implementation is in jszip-load.js, don't forget to include it.
|
|
|
1239 |
* @param {String|ArrayBuffer|Uint8Array|Buffer} stream The stream to load
|
|
|
1240 |
* @param {Object} options Options for loading the stream.
|
|
|
1241 |
* options.base64 : is the stream in base64 ? default : false
|
|
|
1242 |
* @return {JSZip} the current JSZip object
|
|
|
1243 |
*/
|
|
|
1244 |
load: function(stream, options) {
|
|
|
1245 |
throw new Error("Load method is not defined. Is the file jszip-load.js included ?");
|
|
|
1246 |
},
|
|
|
1247 |
|
|
|
1248 |
/**
|
|
|
1249 |
* Filter nested files/folders with the specified function.
|
|
|
1250 |
* @param {Function} search the predicate to use :
|
|
|
1251 |
* function (relativePath, file) {...}
|
|
|
1252 |
* It takes 2 arguments : the relative path and the file.
|
|
|
1253 |
* @return {Array} An array of matching elements.
|
|
|
1254 |
*/
|
|
|
1255 |
filter: function(search) {
|
|
|
1256 |
var result = [],
|
|
|
1257 |
filename, relativePath, file, fileClone;
|
|
|
1258 |
for (filename in this.files) {
|
|
|
1259 |
if (!this.files.hasOwnProperty(filename)) {
|
|
|
1260 |
continue;
|
|
|
1261 |
}
|
|
|
1262 |
file = this.files[filename];
|
|
|
1263 |
// return a new object, don't let the user mess with our internal objects :)
|
|
|
1264 |
fileClone = new ZipObject(file.name, file._data, extend(file.options));
|
|
|
1265 |
relativePath = filename.slice(this.root.length, filename.length);
|
|
|
1266 |
if (filename.slice(0, this.root.length) === this.root && // the file is in the current root
|
|
|
1267 |
search(relativePath, fileClone)) { // and the file matches the function
|
|
|
1268 |
result.push(fileClone);
|
|
|
1269 |
}
|
|
|
1270 |
}
|
|
|
1271 |
return result;
|
|
|
1272 |
},
|
|
|
1273 |
|
|
|
1274 |
/**
|
|
|
1275 |
* Add a file to the zip file, or search a file.
|
|
|
1276 |
* @param {string|RegExp} name The name of the file to add (if data is defined),
|
|
|
1277 |
* the name of the file to find (if no data) or a regex to match files.
|
|
|
1278 |
* @param {String|ArrayBuffer|Uint8Array|Buffer} data The file data, either raw or base64 encoded
|
|
|
1279 |
* @param {Object} o File options
|
|
|
1280 |
* @return {JSZip|Object|Array} this JSZip object (when adding a file),
|
|
|
1281 |
* a file (when searching by string) or an array of files (when searching by regex).
|
|
|
1282 |
*/
|
|
|
1283 |
file: function(name, data, o) {
|
|
|
1284 |
if (arguments.length === 1) {
|
|
|
1285 |
if (utils.isRegExp(name)) {
|
|
|
1286 |
var regexp = name;
|
|
|
1287 |
return this.filter(function(relativePath, file) {
|
|
|
1288 |
return !file.dir && regexp.test(relativePath);
|
|
|
1289 |
});
|
|
|
1290 |
}
|
|
|
1291 |
else { // text
|
|
|
1292 |
return this.filter(function(relativePath, file) {
|
|
|
1293 |
return !file.dir && relativePath === name;
|
|
|
1294 |
})[0] || null;
|
|
|
1295 |
}
|
|
|
1296 |
}
|
|
|
1297 |
else { // more than one argument : we have data !
|
|
|
1298 |
name = this.root + name;
|
|
|
1299 |
fileAdd.call(this, name, data, o);
|
|
|
1300 |
}
|
|
|
1301 |
return this;
|
|
|
1302 |
},
|
|
|
1303 |
|
|
|
1304 |
/**
|
|
|
1305 |
* Add a directory to the zip file, or search.
|
|
|
1306 |
* @param {String|RegExp} arg The name of the directory to add, or a regex to search folders.
|
|
|
1307 |
* @return {JSZip} an object with the new directory as the root, or an array containing matching folders.
|
|
|
1308 |
*/
|
|
|
1309 |
folder: function(arg) {
|
|
|
1310 |
if (!arg) {
|
|
|
1311 |
return this;
|
|
|
1312 |
}
|
|
|
1313 |
|
|
|
1314 |
if (utils.isRegExp(arg)) {
|
|
|
1315 |
return this.filter(function(relativePath, file) {
|
|
|
1316 |
return file.dir && arg.test(relativePath);
|
|
|
1317 |
});
|
|
|
1318 |
}
|
|
|
1319 |
|
|
|
1320 |
// else, name is a new folder
|
|
|
1321 |
var name = this.root + arg;
|
|
|
1322 |
var newFolder = folderAdd.call(this, name);
|
|
|
1323 |
|
|
|
1324 |
// Allow chaining by returning a new object with this folder as the root
|
|
|
1325 |
var ret = this.clone();
|
|
|
1326 |
ret.root = newFolder.name;
|
|
|
1327 |
return ret;
|
|
|
1328 |
},
|
|
|
1329 |
|
|
|
1330 |
/**
|
|
|
1331 |
* Delete a file, or a directory and all sub-files, from the zip
|
|
|
1332 |
* @param {string} name the name of the file to delete
|
|
|
1333 |
* @return {JSZip} this JSZip object
|
|
|
1334 |
*/
|
|
|
1335 |
remove: function(name) {
|
|
|
1336 |
name = this.root + name;
|
|
|
1337 |
var file = this.files[name];
|
|
|
1338 |
if (!file) {
|
|
|
1339 |
// Look for any folders
|
|
|
1340 |
if (name.slice(-1) != "/") {
|
|
|
1341 |
name += "/";
|
|
|
1342 |
}
|
|
|
1343 |
file = this.files[name];
|
|
|
1344 |
}
|
|
|
1345 |
|
|
|
1346 |
if (file && !file.dir) {
|
|
|
1347 |
// file
|
|
|
1348 |
delete this.files[name];
|
|
|
1349 |
} else {
|
|
|
1350 |
// maybe a folder, delete recursively
|
|
|
1351 |
var kids = this.filter(function(relativePath, file) {
|
|
|
1352 |
return file.name.slice(0, name.length) === name;
|
|
|
1353 |
});
|
|
|
1354 |
for (var i = 0; i < kids.length; i++) {
|
|
|
1355 |
delete this.files[kids[i].name];
|
|
|
1356 |
}
|
|
|
1357 |
}
|
|
|
1358 |
|
|
|
1359 |
return this;
|
|
|
1360 |
},
|
|
|
1361 |
|
|
|
1362 |
/**
|
|
|
1363 |
* Generate the complete zip file
|
|
|
1364 |
* @param {Object} options the options to generate the zip file :
|
|
|
1365 |
* - base64, (deprecated, use type instead) true to generate base64.
|
|
|
1366 |
* - compression, "STORE" by default.
|
|
|
1367 |
* - type, "base64" by default. Values are : string, base64, uint8array, arraybuffer, blob.
|
|
|
1368 |
* @return {String|Uint8Array|ArrayBuffer|Buffer|Blob} the zip file
|
|
|
1369 |
*/
|
|
|
1370 |
generate: function(options) {
|
|
|
1371 |
options = extend(options || {}, {
|
|
|
1372 |
base64: true,
|
|
|
1373 |
compression: "STORE",
|
|
|
1374 |
compressionOptions : null,
|
|
|
1375 |
type: "base64",
|
|
|
1376 |
platform: "DOS",
|
|
|
1377 |
comment: null,
|
|
|
1378 |
mimeType: 'application/zip'
|
|
|
1379 |
});
|
|
|
1380 |
|
|
|
1381 |
utils.checkSupport(options.type);
|
|
|
1382 |
|
|
|
1383 |
// accept nodejs `process.platform`
|
|
|
1384 |
if(
|
|
|
1385 |
options.platform === 'darwin' ||
|
|
|
1386 |
options.platform === 'freebsd' ||
|
|
|
1387 |
options.platform === 'linux' ||
|
|
|
1388 |
options.platform === 'sunos'
|
|
|
1389 |
) {
|
|
|
1390 |
options.platform = "UNIX";
|
|
|
1391 |
}
|
|
|
1392 |
if (options.platform === 'win32') {
|
|
|
1393 |
options.platform = "DOS";
|
|
|
1394 |
}
|
|
|
1395 |
|
|
|
1396 |
var zipData = [],
|
|
|
1397 |
localDirLength = 0,
|
|
|
1398 |
centralDirLength = 0,
|
|
|
1399 |
writer, i,
|
|
|
1400 |
utfEncodedComment = utils.transformTo("string", this.utf8encode(options.comment || this.comment || ""));
|
|
|
1401 |
|
|
|
1402 |
// first, generate all the zip parts.
|
|
|
1403 |
for (var name in this.files) {
|
|
|
1404 |
if (!this.files.hasOwnProperty(name)) {
|
|
|
1405 |
continue;
|
|
|
1406 |
}
|
|
|
1407 |
var file = this.files[name];
|
|
|
1408 |
|
|
|
1409 |
var compressionName = file.options.compression || options.compression.toUpperCase();
|
|
|
1410 |
var compression = compressions[compressionName];
|
|
|
1411 |
if (!compression) {
|
|
|
1412 |
throw new Error(compressionName + " is not a valid compression method !");
|
|
|
1413 |
}
|
|
|
1414 |
var compressionOptions = file.options.compressionOptions || options.compressionOptions || {};
|
|
|
1415 |
|
|
|
1416 |
var compressedObject = generateCompressedObjectFrom.call(this, file, compression, compressionOptions);
|
|
|
1417 |
|
|
|
1418 |
var zipPart = generateZipParts.call(this, name, file, compressedObject, localDirLength, options.platform);
|
|
|
1419 |
localDirLength += zipPart.fileRecord.length + compressedObject.compressedSize;
|
|
|
1420 |
centralDirLength += zipPart.dirRecord.length;
|
|
|
1421 |
zipData.push(zipPart);
|
|
|
1422 |
}
|
|
|
1423 |
|
|
|
1424 |
var dirEnd = "";
|
|
|
1425 |
|
|
|
1426 |
// end of central dir signature
|
|
|
1427 |
dirEnd = signature.CENTRAL_DIRECTORY_END +
|
|
|
1428 |
// number of this disk
|
|
|
1429 |
"\x00\x00" +
|
|
|
1430 |
// number of the disk with the start of the central directory
|
|
|
1431 |
"\x00\x00" +
|
|
|
1432 |
// total number of entries in the central directory on this disk
|
|
|
1433 |
decToHex(zipData.length, 2) +
|
|
|
1434 |
// total number of entries in the central directory
|
|
|
1435 |
decToHex(zipData.length, 2) +
|
|
|
1436 |
// size of the central directory 4 bytes
|
|
|
1437 |
decToHex(centralDirLength, 4) +
|
|
|
1438 |
// offset of start of central directory with respect to the starting disk number
|
|
|
1439 |
decToHex(localDirLength, 4) +
|
|
|
1440 |
// .ZIP file comment length
|
|
|
1441 |
decToHex(utfEncodedComment.length, 2) +
|
|
|
1442 |
// .ZIP file comment
|
|
|
1443 |
utfEncodedComment;
|
|
|
1444 |
|
|
|
1445 |
|
|
|
1446 |
// we have all the parts (and the total length)
|
|
|
1447 |
// time to create a writer !
|
|
|
1448 |
var typeName = options.type.toLowerCase();
|
|
|
1449 |
if(typeName==="uint8array"||typeName==="arraybuffer"||typeName==="blob"||typeName==="nodebuffer") {
|
|
|
1450 |
writer = new Uint8ArrayWriter(localDirLength + centralDirLength + dirEnd.length);
|
|
|
1451 |
}else{
|
|
|
1452 |
writer = new StringWriter(localDirLength + centralDirLength + dirEnd.length);
|
|
|
1453 |
}
|
|
|
1454 |
|
|
|
1455 |
for (i = 0; i < zipData.length; i++) {
|
|
|
1456 |
writer.append(zipData[i].fileRecord);
|
|
|
1457 |
writer.append(zipData[i].compressedObject.compressedContent);
|
|
|
1458 |
}
|
|
|
1459 |
for (i = 0; i < zipData.length; i++) {
|
|
|
1460 |
writer.append(zipData[i].dirRecord);
|
|
|
1461 |
}
|
|
|
1462 |
|
|
|
1463 |
writer.append(dirEnd);
|
|
|
1464 |
|
|
|
1465 |
var zip = writer.finalize();
|
|
|
1466 |
|
|
|
1467 |
|
|
|
1468 |
|
|
|
1469 |
switch(options.type.toLowerCase()) {
|
|
|
1470 |
// case "zip is an Uint8Array"
|
|
|
1471 |
case "uint8array" :
|
|
|
1472 |
case "arraybuffer" :
|
|
|
1473 |
case "nodebuffer" :
|
|
|
1474 |
return utils.transformTo(options.type.toLowerCase(), zip);
|
|
|
1475 |
case "blob" :
|
|
|
1476 |
return utils.arrayBuffer2Blob(utils.transformTo("arraybuffer", zip), options.mimeType);
|
|
|
1477 |
// case "zip is a string"
|
|
|
1478 |
case "base64" :
|
|
|
1479 |
return (options.base64) ? base64.encode(zip) : zip;
|
|
|
1480 |
default : // case "string" :
|
|
|
1481 |
return zip;
|
|
|
1482 |
}
|
|
|
1483 |
|
|
|
1484 |
},
|
|
|
1485 |
|
|
|
1486 |
/**
|
|
|
1487 |
* @deprecated
|
|
|
1488 |
* This method will be removed in a future version without replacement.
|
|
|
1489 |
*/
|
|
|
1490 |
crc32: function (input, crc) {
|
|
|
1491 |
return crc32(input, crc);
|
|
|
1492 |
},
|
|
|
1493 |
|
|
|
1494 |
/**
|
|
|
1495 |
* @deprecated
|
|
|
1496 |
* This method will be removed in a future version without replacement.
|
|
|
1497 |
*/
|
|
|
1498 |
utf8encode: function (string) {
|
|
|
1499 |
return utils.transformTo("string", utf8.utf8encode(string));
|
|
|
1500 |
},
|
|
|
1501 |
|
|
|
1502 |
/**
|
|
|
1503 |
* @deprecated
|
|
|
1504 |
* This method will be removed in a future version without replacement.
|
|
|
1505 |
*/
|
|
|
1506 |
utf8decode: function (input) {
|
|
|
1507 |
return utf8.utf8decode(input);
|
|
|
1508 |
}
|
|
|
1509 |
};
|
|
|
1510 |
module.exports = out;
|
|
|
1511 |
|
|
|
1512 |
},{"./base64":1,"./compressedObject":2,"./compressions":3,"./crc32":4,"./defaults":6,"./nodeBuffer":11,"./signature":14,"./stringWriter":16,"./support":17,"./uint8ArrayWriter":19,"./utf8":20,"./utils":21}],14:[function(_dereq_,module,exports){
|
|
|
1513 |
'use strict';
|
|
|
1514 |
exports.LOCAL_FILE_HEADER = "PK\x03\x04";
|
|
|
1515 |
exports.CENTRAL_FILE_HEADER = "PK\x01\x02";
|
|
|
1516 |
exports.CENTRAL_DIRECTORY_END = "PK\x05\x06";
|
|
|
1517 |
exports.ZIP64_CENTRAL_DIRECTORY_LOCATOR = "PK\x06\x07";
|
|
|
1518 |
exports.ZIP64_CENTRAL_DIRECTORY_END = "PK\x06\x06";
|
|
|
1519 |
exports.DATA_DESCRIPTOR = "PK\x07\x08";
|
|
|
1520 |
|
|
|
1521 |
},{}],15:[function(_dereq_,module,exports){
|
|
|
1522 |
'use strict';
|
|
|
1523 |
var DataReader = _dereq_('./dataReader');
|
|
|
1524 |
var utils = _dereq_('./utils');
|
|
|
1525 |
|
|
|
1526 |
function StringReader(data, optimizedBinaryString) {
|
|
|
1527 |
this.data = data;
|
|
|
1528 |
if (!optimizedBinaryString) {
|
|
|
1529 |
this.data = utils.string2binary(this.data);
|
|
|
1530 |
}
|
|
|
1531 |
this.length = this.data.length;
|
|
|
1532 |
this.index = 0;
|
|
|
1533 |
}
|
|
|
1534 |
StringReader.prototype = new DataReader();
|
|
|
1535 |
/**
|
|
|
1536 |
* @see DataReader.byteAt
|
|
|
1537 |
*/
|
|
|
1538 |
StringReader.prototype.byteAt = function(i) {
|
|
|
1539 |
return this.data.charCodeAt(i);
|
|
|
1540 |
};
|
|
|
1541 |
/**
|
|
|
1542 |
* @see DataReader.lastIndexOfSignature
|
|
|
1543 |
*/
|
|
|
1544 |
StringReader.prototype.lastIndexOfSignature = function(sig) {
|
|
|
1545 |
return this.data.lastIndexOf(sig);
|
|
|
1546 |
};
|
|
|
1547 |
/**
|
|
|
1548 |
* @see DataReader.readData
|
|
|
1549 |
*/
|
|
|
1550 |
StringReader.prototype.readData = function(size) {
|
|
|
1551 |
this.checkOffset(size);
|
|
|
1552 |
// this will work because the constructor applied the "& 0xff" mask.
|
|
|
1553 |
var result = this.data.slice(this.index, this.index + size);
|
|
|
1554 |
this.index += size;
|
|
|
1555 |
return result;
|
|
|
1556 |
};
|
|
|
1557 |
module.exports = StringReader;
|
|
|
1558 |
|
|
|
1559 |
},{"./dataReader":5,"./utils":21}],16:[function(_dereq_,module,exports){
|
|
|
1560 |
'use strict';
|
|
|
1561 |
|
|
|
1562 |
var utils = _dereq_('./utils');
|
|
|
1563 |
|
|
|
1564 |
/**
|
|
|
1565 |
* An object to write any content to a string.
|
|
|
1566 |
* @constructor
|
|
|
1567 |
*/
|
|
|
1568 |
var StringWriter = function() {
|
|
|
1569 |
this.data = [];
|
|
|
1570 |
};
|
|
|
1571 |
StringWriter.prototype = {
|
|
|
1572 |
/**
|
|
|
1573 |
* Append any content to the current string.
|
|
|
1574 |
* @param {Object} input the content to add.
|
|
|
1575 |
*/
|
|
|
1576 |
append: function(input) {
|
|
|
1577 |
input = utils.transformTo("string", input);
|
|
|
1578 |
this.data.push(input);
|
|
|
1579 |
},
|
|
|
1580 |
/**
|
|
|
1581 |
* Finalize the construction an return the result.
|
|
|
1582 |
* @return {string} the generated string.
|
|
|
1583 |
*/
|
|
|
1584 |
finalize: function() {
|
|
|
1585 |
return this.data.join("");
|
|
|
1586 |
}
|
|
|
1587 |
};
|
|
|
1588 |
|
|
|
1589 |
module.exports = StringWriter;
|
|
|
1590 |
|
|
|
1591 |
},{"./utils":21}],17:[function(_dereq_,module,exports){
|
|
|
1592 |
(function (Buffer){
|
|
|
1593 |
'use strict';
|
|
|
1594 |
exports.base64 = true;
|
|
|
1595 |
exports.array = true;
|
|
|
1596 |
exports.string = true;
|
|
|
1597 |
exports.arraybuffer = typeof ArrayBuffer !== "undefined" && typeof Uint8Array !== "undefined";
|
|
|
1598 |
// contains true if JSZip can read/generate nodejs Buffer, false otherwise.
|
|
|
1599 |
// Browserify will provide a Buffer implementation for browsers, which is
|
|
|
1600 |
// an augmented Uint8Array (i.e., can be used as either Buffer or U8).
|
|
|
1601 |
exports.nodebuffer = typeof Buffer !== "undefined";
|
|
|
1602 |
// contains true if JSZip can read/generate Uint8Array, false otherwise.
|
|
|
1603 |
exports.uint8array = typeof Uint8Array !== "undefined";
|
|
|
1604 |
|
|
|
1605 |
if (typeof ArrayBuffer === "undefined") {
|
|
|
1606 |
exports.blob = false;
|
|
|
1607 |
}
|
|
|
1608 |
else {
|
|
|
1609 |
var buffer = new ArrayBuffer(0);
|
|
|
1610 |
try {
|
|
|
1611 |
exports.blob = new Blob([buffer], {
|
|
|
1612 |
type: "application/zip"
|
|
|
1613 |
}).size === 0;
|
|
|
1614 |
}
|
|
|
1615 |
catch (e) {
|
|
|
1616 |
try {
|
|
|
1617 |
var Builder = window.BlobBuilder || window.WebKitBlobBuilder || window.MozBlobBuilder || window.MSBlobBuilder;
|
|
|
1618 |
var builder = new Builder();
|
|
|
1619 |
builder.append(buffer);
|
|
|
1620 |
exports.blob = builder.getBlob('application/zip').size === 0;
|
|
|
1621 |
}
|
|
|
1622 |
catch (e) {
|
|
|
1623 |
exports.blob = false;
|
|
|
1624 |
}
|
|
|
1625 |
}
|
|
|
1626 |
}
|
|
|
1627 |
|
|
|
1628 |
}).call(this,(typeof Buffer !== "undefined" ? Buffer : undefined))
|
|
|
1629 |
},{}],18:[function(_dereq_,module,exports){
|
|
|
1630 |
'use strict';
|
|
|
1631 |
var DataReader = _dereq_('./dataReader');
|
|
|
1632 |
|
|
|
1633 |
function Uint8ArrayReader(data) {
|
|
|
1634 |
if (data) {
|
|
|
1635 |
this.data = data;
|
|
|
1636 |
this.length = this.data.length;
|
|
|
1637 |
this.index = 0;
|
|
|
1638 |
}
|
|
|
1639 |
}
|
|
|
1640 |
Uint8ArrayReader.prototype = new DataReader();
|
|
|
1641 |
/**
|
|
|
1642 |
* @see DataReader.byteAt
|
|
|
1643 |
*/
|
|
|
1644 |
Uint8ArrayReader.prototype.byteAt = function(i) {
|
|
|
1645 |
return this.data[i];
|
|
|
1646 |
};
|
|
|
1647 |
/**
|
|
|
1648 |
* @see DataReader.lastIndexOfSignature
|
|
|
1649 |
*/
|
|
|
1650 |
Uint8ArrayReader.prototype.lastIndexOfSignature = function(sig) {
|
|
|
1651 |
var sig0 = sig.charCodeAt(0),
|
|
|
1652 |
sig1 = sig.charCodeAt(1),
|
|
|
1653 |
sig2 = sig.charCodeAt(2),
|
|
|
1654 |
sig3 = sig.charCodeAt(3);
|
|
|
1655 |
for (var i = this.length - 4; i >= 0; --i) {
|
|
|
1656 |
if (this.data[i] === sig0 && this.data[i + 1] === sig1 && this.data[i + 2] === sig2 && this.data[i + 3] === sig3) {
|
|
|
1657 |
return i;
|
|
|
1658 |
}
|
|
|
1659 |
}
|
|
|
1660 |
|
|
|
1661 |
return -1;
|
|
|
1662 |
};
|
|
|
1663 |
/**
|
|
|
1664 |
* @see DataReader.readData
|
|
|
1665 |
*/
|
|
|
1666 |
Uint8ArrayReader.prototype.readData = function(size) {
|
|
|
1667 |
this.checkOffset(size);
|
|
|
1668 |
if(size === 0) {
|
|
|
1669 |
// in IE10, when using subarray(idx, idx), we get the array [0x00] instead of [].
|
|
|
1670 |
return new Uint8Array(0);
|
|
|
1671 |
}
|
|
|
1672 |
var result = this.data.subarray(this.index, this.index + size);
|
|
|
1673 |
this.index += size;
|
|
|
1674 |
return result;
|
|
|
1675 |
};
|
|
|
1676 |
module.exports = Uint8ArrayReader;
|
|
|
1677 |
|
|
|
1678 |
},{"./dataReader":5}],19:[function(_dereq_,module,exports){
|
|
|
1679 |
'use strict';
|
|
|
1680 |
|
|
|
1681 |
var utils = _dereq_('./utils');
|
|
|
1682 |
|
|
|
1683 |
/**
|
|
|
1684 |
* An object to write any content to an Uint8Array.
|
|
|
1685 |
* @constructor
|
|
|
1686 |
* @param {number} length The length of the array.
|
|
|
1687 |
*/
|
|
|
1688 |
var Uint8ArrayWriter = function(length) {
|
|
|
1689 |
this.data = new Uint8Array(length);
|
|
|
1690 |
this.index = 0;
|
|
|
1691 |
};
|
|
|
1692 |
Uint8ArrayWriter.prototype = {
|
|
|
1693 |
/**
|
|
|
1694 |
* Append any content to the current array.
|
|
|
1695 |
* @param {Object} input the content to add.
|
|
|
1696 |
*/
|
|
|
1697 |
append: function(input) {
|
|
|
1698 |
if (input.length !== 0) {
|
|
|
1699 |
// with an empty Uint8Array, Opera fails with a "Offset larger than array size"
|
|
|
1700 |
input = utils.transformTo("uint8array", input);
|
|
|
1701 |
this.data.set(input, this.index);
|
|
|
1702 |
this.index += input.length;
|
|
|
1703 |
}
|
|
|
1704 |
},
|
|
|
1705 |
/**
|
|
|
1706 |
* Finalize the construction an return the result.
|
|
|
1707 |
* @return {Uint8Array} the generated array.
|
|
|
1708 |
*/
|
|
|
1709 |
finalize: function() {
|
|
|
1710 |
return this.data;
|
|
|
1711 |
}
|
|
|
1712 |
};
|
|
|
1713 |
|
|
|
1714 |
module.exports = Uint8ArrayWriter;
|
|
|
1715 |
|
|
|
1716 |
},{"./utils":21}],20:[function(_dereq_,module,exports){
|
|
|
1717 |
'use strict';
|
|
|
1718 |
|
|
|
1719 |
var utils = _dereq_('./utils');
|
|
|
1720 |
var support = _dereq_('./support');
|
|
|
1721 |
var nodeBuffer = _dereq_('./nodeBuffer');
|
|
|
1722 |
|
|
|
1723 |
/**
|
|
|
1724 |
* The following functions come from pako, from pako/lib/utils/strings
|
|
|
1725 |
* released under the MIT license, see pako https://github.com/nodeca/pako/
|
|
|
1726 |
*/
|
|
|
1727 |
|
|
|
1728 |
// Table with utf8 lengths (calculated by first byte of sequence)
|
|
|
1729 |
// Note, that 5 & 6-byte values and some 4-byte values can not be represented in JS,
|
|
|
1730 |
// because max possible codepoint is 0x10ffff
|
|
|
1731 |
var _utf8len = new Array(256);
|
|
|
1732 |
for (var i=0; i<256; i++) {
|
|
|
1733 |
_utf8len[i] = (i >= 252 ? 6 : i >= 248 ? 5 : i >= 240 ? 4 : i >= 224 ? 3 : i >= 192 ? 2 : 1);
|
|
|
1734 |
}
|
|
|
1735 |
_utf8len[254]=_utf8len[254]=1; // Invalid sequence start
|
|
|
1736 |
|
|
|
1737 |
// convert string to array (typed, when possible)
|
|
|
1738 |
var string2buf = function (str) {
|
|
|
1739 |
var buf, c, c2, m_pos, i, str_len = str.length, buf_len = 0;
|
|
|
1740 |
|
|
|
1741 |
// count binary size
|
|
|
1742 |
for (m_pos = 0; m_pos < str_len; m_pos++) {
|
|
|
1743 |
c = str.charCodeAt(m_pos);
|
|
|
1744 |
if ((c & 0xfc00) === 0xd800 && (m_pos+1 < str_len)) {
|
|
|
1745 |
c2 = str.charCodeAt(m_pos+1);
|
|
|
1746 |
if ((c2 & 0xfc00) === 0xdc00) {
|
|
|
1747 |
c = 0x10000 + ((c - 0xd800) << 10) + (c2 - 0xdc00);
|
|
|
1748 |
m_pos++;
|
|
|
1749 |
}
|
|
|
1750 |
}
|
|
|
1751 |
buf_len += c < 0x80 ? 1 : c < 0x800 ? 2 : c < 0x10000 ? 3 : 4;
|
|
|
1752 |
}
|
|
|
1753 |
|
|
|
1754 |
// allocate buffer
|
|
|
1755 |
if (support.uint8array) {
|
|
|
1756 |
buf = new Uint8Array(buf_len);
|
|
|
1757 |
} else {
|
|
|
1758 |
buf = new Array(buf_len);
|
|
|
1759 |
}
|
|
|
1760 |
|
|
|
1761 |
// convert
|
|
|
1762 |
for (i=0, m_pos = 0; i < buf_len; m_pos++) {
|
|
|
1763 |
c = str.charCodeAt(m_pos);
|
|
|
1764 |
if ((c & 0xfc00) === 0xd800 && (m_pos+1 < str_len)) {
|
|
|
1765 |
c2 = str.charCodeAt(m_pos+1);
|
|
|
1766 |
if ((c2 & 0xfc00) === 0xdc00) {
|
|
|
1767 |
c = 0x10000 + ((c - 0xd800) << 10) + (c2 - 0xdc00);
|
|
|
1768 |
m_pos++;
|
|
|
1769 |
}
|
|
|
1770 |
}
|
|
|
1771 |
if (c < 0x80) {
|
|
|
1772 |
/* one byte */
|
|
|
1773 |
buf[i++] = c;
|
|
|
1774 |
} else if (c < 0x800) {
|
|
|
1775 |
/* two bytes */
|
|
|
1776 |
buf[i++] = 0xC0 | (c >>> 6);
|
|
|
1777 |
buf[i++] = 0x80 | (c & 0x3f);
|
|
|
1778 |
} else if (c < 0x10000) {
|
|
|
1779 |
/* three bytes */
|
|
|
1780 |
buf[i++] = 0xE0 | (c >>> 12);
|
|
|
1781 |
buf[i++] = 0x80 | (c >>> 6 & 0x3f);
|
|
|
1782 |
buf[i++] = 0x80 | (c & 0x3f);
|
|
|
1783 |
} else {
|
|
|
1784 |
/* four bytes */
|
|
|
1785 |
buf[i++] = 0xf0 | (c >>> 18);
|
|
|
1786 |
buf[i++] = 0x80 | (c >>> 12 & 0x3f);
|
|
|
1787 |
buf[i++] = 0x80 | (c >>> 6 & 0x3f);
|
|
|
1788 |
buf[i++] = 0x80 | (c & 0x3f);
|
|
|
1789 |
}
|
|
|
1790 |
}
|
|
|
1791 |
|
|
|
1792 |
return buf;
|
|
|
1793 |
};
|
|
|
1794 |
|
|
|
1795 |
// Calculate max possible position in utf8 buffer,
|
|
|
1796 |
// that will not break sequence. If that's not possible
|
|
|
1797 |
// - (very small limits) return max size as is.
|
|
|
1798 |
//
|
|
|
1799 |
// buf[] - utf8 bytes array
|
|
|
1800 |
// max - length limit (mandatory);
|
|
|
1801 |
var utf8border = function(buf, max) {
|
|
|
1802 |
var pos;
|
|
|
1803 |
|
|
|
1804 |
max = max || buf.length;
|
|
|
1805 |
if (max > buf.length) { max = buf.length; }
|
|
|
1806 |
|
|
|
1807 |
// go back from last position, until start of sequence found
|
|
|
1808 |
pos = max-1;
|
|
|
1809 |
while (pos >= 0 && (buf[pos] & 0xC0) === 0x80) { pos--; }
|
|
|
1810 |
|
|
|
1811 |
// Fuckup - very small and broken sequence,
|
|
|
1812 |
// return max, because we should return something anyway.
|
|
|
1813 |
if (pos < 0) { return max; }
|
|
|
1814 |
|
|
|
1815 |
// If we came to start of buffer - that means vuffer is too small,
|
|
|
1816 |
// return max too.
|
|
|
1817 |
if (pos === 0) { return max; }
|
|
|
1818 |
|
|
|
1819 |
return (pos + _utf8len[buf[pos]] > max) ? pos : max;
|
|
|
1820 |
};
|
|
|
1821 |
|
|
|
1822 |
// convert array to string
|
|
|
1823 |
var buf2string = function (buf) {
|
|
|
1824 |
var str, i, out, c, c_len;
|
|
|
1825 |
var len = buf.length;
|
|
|
1826 |
|
|
|
1827 |
// Reserve max possible length (2 words per char)
|
|
|
1828 |
// NB: by unknown reasons, Array is significantly faster for
|
|
|
1829 |
// String.fromCharCode.apply than Uint16Array.
|
|
|
1830 |
var utf16buf = new Array(len*2);
|
|
|
1831 |
|
|
|
1832 |
for (out=0, i=0; i<len;) {
|
|
|
1833 |
c = buf[i++];
|
|
|
1834 |
// quick process ascii
|
|
|
1835 |
if (c < 0x80) { utf16buf[out++] = c; continue; }
|
|
|
1836 |
|
|
|
1837 |
c_len = _utf8len[c];
|
|
|
1838 |
// skip 5 & 6 byte codes
|
|
|
1839 |
if (c_len > 4) { utf16buf[out++] = 0xfffd; i += c_len-1; continue; }
|
|
|
1840 |
|
|
|
1841 |
// apply mask on first byte
|
|
|
1842 |
c &= c_len === 2 ? 0x1f : c_len === 3 ? 0x0f : 0x07;
|
|
|
1843 |
// join the rest
|
|
|
1844 |
while (c_len > 1 && i < len) {
|
|
|
1845 |
c = (c << 6) | (buf[i++] & 0x3f);
|
|
|
1846 |
c_len--;
|
|
|
1847 |
}
|
|
|
1848 |
|
|
|
1849 |
// terminated by end of string?
|
|
|
1850 |
if (c_len > 1) { utf16buf[out++] = 0xfffd; continue; }
|
|
|
1851 |
|
|
|
1852 |
if (c < 0x10000) {
|
|
|
1853 |
utf16buf[out++] = c;
|
|
|
1854 |
} else {
|
|
|
1855 |
c -= 0x10000;
|
|
|
1856 |
utf16buf[out++] = 0xd800 | ((c >> 10) & 0x3ff);
|
|
|
1857 |
utf16buf[out++] = 0xdc00 | (c & 0x3ff);
|
|
|
1858 |
}
|
|
|
1859 |
}
|
|
|
1860 |
|
|
|
1861 |
// shrinkBuf(utf16buf, out)
|
|
|
1862 |
if (utf16buf.length !== out) {
|
|
|
1863 |
if(utf16buf.subarray) {
|
|
|
1864 |
utf16buf = utf16buf.subarray(0, out);
|
|
|
1865 |
} else {
|
|
|
1866 |
utf16buf.length = out;
|
|
|
1867 |
}
|
|
|
1868 |
}
|
|
|
1869 |
|
|
|
1870 |
// return String.fromCharCode.apply(null, utf16buf);
|
|
|
1871 |
return utils.applyFromCharCode(utf16buf);
|
|
|
1872 |
};
|
|
|
1873 |
|
|
|
1874 |
|
|
|
1875 |
// That's all for the pako functions.
|
|
|
1876 |
|
|
|
1877 |
|
|
|
1878 |
/**
|
|
|
1879 |
* Transform a javascript string into an array (typed if possible) of bytes,
|
|
|
1880 |
* UTF-8 encoded.
|
|
|
1881 |
* @param {String} str the string to encode
|
|
|
1882 |
* @return {Array|Uint8Array|Buffer} the UTF-8 encoded string.
|
|
|
1883 |
*/
|
|
|
1884 |
exports.utf8encode = function utf8encode(str) {
|
|
|
1885 |
if (support.nodebuffer) {
|
|
|
1886 |
return nodeBuffer(str, "utf-8");
|
|
|
1887 |
}
|
|
|
1888 |
|
|
|
1889 |
return string2buf(str);
|
|
|
1890 |
};
|
|
|
1891 |
|
|
|
1892 |
|
|
|
1893 |
/**
|
|
|
1894 |
* Transform a bytes array (or a representation) representing an UTF-8 encoded
|
|
|
1895 |
* string into a javascript string.
|
|
|
1896 |
* @param {Array|Uint8Array|Buffer} buf the data de decode
|
|
|
1897 |
* @return {String} the decoded string.
|
|
|
1898 |
*/
|
|
|
1899 |
exports.utf8decode = function utf8decode(buf) {
|
|
|
1900 |
if (support.nodebuffer) {
|
|
|
1901 |
return utils.transformTo("nodebuffer", buf).toString("utf-8");
|
|
|
1902 |
}
|
|
|
1903 |
|
|
|
1904 |
buf = utils.transformTo(support.uint8array ? "uint8array" : "array", buf);
|
|
|
1905 |
|
|
|
1906 |
// return buf2string(buf);
|
|
|
1907 |
// Chrome prefers to work with "small" chunks of data
|
|
|
1908 |
// for the method buf2string.
|
|
|
1909 |
// Firefox and Chrome has their own shortcut, IE doesn't seem to really care.
|
|
|
1910 |
var result = [], k = 0, len = buf.length, chunk = 65536;
|
|
|
1911 |
while (k < len) {
|
|
|
1912 |
var nextBoundary = utf8border(buf, Math.min(k + chunk, len));
|
|
|
1913 |
if (support.uint8array) {
|
|
|
1914 |
result.push(buf2string(buf.subarray(k, nextBoundary)));
|
|
|
1915 |
} else {
|
|
|
1916 |
result.push(buf2string(buf.slice(k, nextBoundary)));
|
|
|
1917 |
}
|
|
|
1918 |
k = nextBoundary;
|
|
|
1919 |
}
|
|
|
1920 |
return result.join("");
|
|
|
1921 |
|
|
|
1922 |
};
|
|
|
1923 |
// vim: set shiftwidth=4 softtabstop=4:
|
|
|
1924 |
|
|
|
1925 |
},{"./nodeBuffer":11,"./support":17,"./utils":21}],21:[function(_dereq_,module,exports){
|
|
|
1926 |
'use strict';
|
|
|
1927 |
var support = _dereq_('./support');
|
|
|
1928 |
var compressions = _dereq_('./compressions');
|
|
|
1929 |
var nodeBuffer = _dereq_('./nodeBuffer');
|
|
|
1930 |
/**
|
|
|
1931 |
* Convert a string to a "binary string" : a string containing only char codes between 0 and 255.
|
|
|
1932 |
* @param {string} str the string to transform.
|
|
|
1933 |
* @return {String} the binary string.
|
|
|
1934 |
*/
|
|
|
1935 |
exports.string2binary = function(str) {
|
|
|
1936 |
var result = "";
|
|
|
1937 |
for (var i = 0; i < str.length; i++) {
|
|
|
1938 |
result += String.fromCharCode(str.charCodeAt(i) & 0xff);
|
|
|
1939 |
}
|
|
|
1940 |
return result;
|
|
|
1941 |
};
|
|
|
1942 |
exports.arrayBuffer2Blob = function(buffer, mimeType) {
|
|
|
1943 |
exports.checkSupport("blob");
|
|
|
1944 |
mimeType = mimeType || 'application/zip';
|
|
|
1945 |
|
|
|
1946 |
try {
|
|
|
1947 |
// Blob constructor
|
|
|
1948 |
return new Blob([buffer], {
|
|
|
1949 |
type: mimeType
|
|
|
1950 |
});
|
|
|
1951 |
}
|
|
|
1952 |
catch (e) {
|
|
|
1953 |
|
|
|
1954 |
try {
|
|
|
1955 |
// deprecated, browser only, old way
|
|
|
1956 |
var Builder = window.BlobBuilder || window.WebKitBlobBuilder || window.MozBlobBuilder || window.MSBlobBuilder;
|
|
|
1957 |
var builder = new Builder();
|
|
|
1958 |
builder.append(buffer);
|
|
|
1959 |
return builder.getBlob(mimeType);
|
|
|
1960 |
}
|
|
|
1961 |
catch (e) {
|
|
|
1962 |
|
|
|
1963 |
// well, fuck ?!
|
|
|
1964 |
throw new Error("Bug : can't construct the Blob.");
|
|
|
1965 |
}
|
|
|
1966 |
}
|
|
|
1967 |
|
|
|
1968 |
|
|
|
1969 |
};
|
|
|
1970 |
/**
|
|
|
1971 |
* The identity function.
|
|
|
1972 |
* @param {Object} input the input.
|
|
|
1973 |
* @return {Object} the same input.
|
|
|
1974 |
*/
|
|
|
1975 |
function identity(input) {
|
|
|
1976 |
return input;
|
|
|
1977 |
}
|
|
|
1978 |
|
|
|
1979 |
/**
|
|
|
1980 |
* Fill in an array with a string.
|
|
|
1981 |
* @param {String} str the string to use.
|
|
|
1982 |
* @param {Array|ArrayBuffer|Uint8Array|Buffer} array the array to fill in (will be mutated).
|
|
|
1983 |
* @return {Array|ArrayBuffer|Uint8Array|Buffer} the updated array.
|
|
|
1984 |
*/
|
|
|
1985 |
function stringToArrayLike(str, array) {
|
|
|
1986 |
for (var i = 0; i < str.length; ++i) {
|
|
|
1987 |
array[i] = str.charCodeAt(i) & 0xFF;
|
|
|
1988 |
}
|
|
|
1989 |
return array;
|
|
|
1990 |
}
|
|
|
1991 |
|
|
|
1992 |
/**
|
|
|
1993 |
* Transform an array-like object to a string.
|
|
|
1994 |
* @param {Array|ArrayBuffer|Uint8Array|Buffer} array the array to transform.
|
|
|
1995 |
* @return {String} the result.
|
|
|
1996 |
*/
|
|
|
1997 |
function arrayLikeToString(array) {
|
|
|
1998 |
// Performances notes :
|
|
|
1999 |
// --------------------
|
|
|
2000 |
// String.fromCharCode.apply(null, array) is the fastest, see
|
|
|
2001 |
// see http://jsperf.com/converting-a-uint8array-to-a-string/2
|
|
|
2002 |
// but the stack is limited (and we can get huge arrays !).
|
|
|
2003 |
//
|
|
|
2004 |
// result += String.fromCharCode(array[i]); generate too many strings !
|
|
|
2005 |
//
|
|
|
2006 |
// This code is inspired by http://jsperf.com/arraybuffer-to-string-apply-performance/2
|
|
|
2007 |
var chunk = 65536;
|
|
|
2008 |
var result = [],
|
|
|
2009 |
len = array.length,
|
|
|
2010 |
type = exports.getTypeOf(array),
|
|
|
2011 |
k = 0,
|
|
|
2012 |
canUseApply = true;
|
|
|
2013 |
try {
|
|
|
2014 |
switch(type) {
|
|
|
2015 |
case "uint8array":
|
|
|
2016 |
String.fromCharCode.apply(null, new Uint8Array(0));
|
|
|
2017 |
break;
|
|
|
2018 |
case "nodebuffer":
|
|
|
2019 |
String.fromCharCode.apply(null, nodeBuffer(0));
|
|
|
2020 |
break;
|
|
|
2021 |
}
|
|
|
2022 |
} catch(e) {
|
|
|
2023 |
canUseApply = false;
|
|
|
2024 |
}
|
|
|
2025 |
|
|
|
2026 |
// no apply : slow and painful algorithm
|
|
|
2027 |
// default browser on android 4.*
|
|
|
2028 |
if (!canUseApply) {
|
|
|
2029 |
var resultStr = "";
|
|
|
2030 |
for(var i = 0; i < array.length;i++) {
|
|
|
2031 |
resultStr += String.fromCharCode(array[i]);
|
|
|
2032 |
}
|
|
|
2033 |
return resultStr;
|
|
|
2034 |
}
|
|
|
2035 |
while (k < len && chunk > 1) {
|
|
|
2036 |
try {
|
|
|
2037 |
if (type === "array" || type === "nodebuffer") {
|
|
|
2038 |
result.push(String.fromCharCode.apply(null, array.slice(k, Math.min(k + chunk, len))));
|
|
|
2039 |
}
|
|
|
2040 |
else {
|
|
|
2041 |
result.push(String.fromCharCode.apply(null, array.subarray(k, Math.min(k + chunk, len))));
|
|
|
2042 |
}
|
|
|
2043 |
k += chunk;
|
|
|
2044 |
}
|
|
|
2045 |
catch (e) {
|
|
|
2046 |
chunk = Math.floor(chunk / 2);
|
|
|
2047 |
}
|
|
|
2048 |
}
|
|
|
2049 |
return result.join("");
|
|
|
2050 |
}
|
|
|
2051 |
|
|
|
2052 |
exports.applyFromCharCode = arrayLikeToString;
|
|
|
2053 |
|
|
|
2054 |
|
|
|
2055 |
/**
|
|
|
2056 |
* Copy the data from an array-like to an other array-like.
|
|
|
2057 |
* @param {Array|ArrayBuffer|Uint8Array|Buffer} arrayFrom the origin array.
|
|
|
2058 |
* @param {Array|ArrayBuffer|Uint8Array|Buffer} arrayTo the destination array which will be mutated.
|
|
|
2059 |
* @return {Array|ArrayBuffer|Uint8Array|Buffer} the updated destination array.
|
|
|
2060 |
*/
|
|
|
2061 |
function arrayLikeToArrayLike(arrayFrom, arrayTo) {
|
|
|
2062 |
for (var i = 0; i < arrayFrom.length; i++) {
|
|
|
2063 |
arrayTo[i] = arrayFrom[i];
|
|
|
2064 |
}
|
|
|
2065 |
return arrayTo;
|
|
|
2066 |
}
|
|
|
2067 |
|
|
|
2068 |
// a matrix containing functions to transform everything into everything.
|
|
|
2069 |
var transform = {};
|
|
|
2070 |
|
|
|
2071 |
// string to ?
|
|
|
2072 |
transform["string"] = {
|
|
|
2073 |
"string": identity,
|
|
|
2074 |
"array": function(input) {
|
|
|
2075 |
return stringToArrayLike(input, new Array(input.length));
|
|
|
2076 |
},
|
|
|
2077 |
"arraybuffer": function(input) {
|
|
|
2078 |
return transform["string"]["uint8array"](input).buffer;
|
|
|
2079 |
},
|
|
|
2080 |
"uint8array": function(input) {
|
|
|
2081 |
return stringToArrayLike(input, new Uint8Array(input.length));
|
|
|
2082 |
},
|
|
|
2083 |
"nodebuffer": function(input) {
|
|
|
2084 |
return stringToArrayLike(input, nodeBuffer(input.length));
|
|
|
2085 |
}
|
|
|
2086 |
};
|
|
|
2087 |
|
|
|
2088 |
// array to ?
|
|
|
2089 |
transform["array"] = {
|
|
|
2090 |
"string": arrayLikeToString,
|
|
|
2091 |
"array": identity,
|
|
|
2092 |
"arraybuffer": function(input) {
|
|
|
2093 |
return (new Uint8Array(input)).buffer;
|
|
|
2094 |
},
|
|
|
2095 |
"uint8array": function(input) {
|
|
|
2096 |
return new Uint8Array(input);
|
|
|
2097 |
},
|
|
|
2098 |
"nodebuffer": function(input) {
|
|
|
2099 |
return nodeBuffer(input);
|
|
|
2100 |
}
|
|
|
2101 |
};
|
|
|
2102 |
|
|
|
2103 |
// arraybuffer to ?
|
|
|
2104 |
transform["arraybuffer"] = {
|
|
|
2105 |
"string": function(input) {
|
|
|
2106 |
return arrayLikeToString(new Uint8Array(input));
|
|
|
2107 |
},
|
|
|
2108 |
"array": function(input) {
|
|
|
2109 |
return arrayLikeToArrayLike(new Uint8Array(input), new Array(input.byteLength));
|
|
|
2110 |
},
|
|
|
2111 |
"arraybuffer": identity,
|
|
|
2112 |
"uint8array": function(input) {
|
|
|
2113 |
return new Uint8Array(input);
|
|
|
2114 |
},
|
|
|
2115 |
"nodebuffer": function(input) {
|
|
|
2116 |
return nodeBuffer(new Uint8Array(input));
|
|
|
2117 |
}
|
|
|
2118 |
};
|
|
|
2119 |
|
|
|
2120 |
// uint8array to ?
|
|
|
2121 |
transform["uint8array"] = {
|
|
|
2122 |
"string": arrayLikeToString,
|
|
|
2123 |
"array": function(input) {
|
|
|
2124 |
return arrayLikeToArrayLike(input, new Array(input.length));
|
|
|
2125 |
},
|
|
|
2126 |
"arraybuffer": function(input) {
|
|
|
2127 |
return input.buffer;
|
|
|
2128 |
},
|
|
|
2129 |
"uint8array": identity,
|
|
|
2130 |
"nodebuffer": function(input) {
|
|
|
2131 |
return nodeBuffer(input);
|
|
|
2132 |
}
|
|
|
2133 |
};
|
|
|
2134 |
|
|
|
2135 |
// nodebuffer to ?
|
|
|
2136 |
transform["nodebuffer"] = {
|
|
|
2137 |
"string": arrayLikeToString,
|
|
|
2138 |
"array": function(input) {
|
|
|
2139 |
return arrayLikeToArrayLike(input, new Array(input.length));
|
|
|
2140 |
},
|
|
|
2141 |
"arraybuffer": function(input) {
|
|
|
2142 |
return transform["nodebuffer"]["uint8array"](input).buffer;
|
|
|
2143 |
},
|
|
|
2144 |
"uint8array": function(input) {
|
|
|
2145 |
return arrayLikeToArrayLike(input, new Uint8Array(input.length));
|
|
|
2146 |
},
|
|
|
2147 |
"nodebuffer": identity
|
|
|
2148 |
};
|
|
|
2149 |
|
|
|
2150 |
/**
|
|
|
2151 |
* Transform an input into any type.
|
|
|
2152 |
* The supported output type are : string, array, uint8array, arraybuffer, nodebuffer.
|
|
|
2153 |
* If no output type is specified, the unmodified input will be returned.
|
|
|
2154 |
* @param {String} outputType the output type.
|
|
|
2155 |
* @param {String|Array|ArrayBuffer|Uint8Array|Buffer} input the input to convert.
|
|
|
2156 |
* @throws {Error} an Error if the browser doesn't support the requested output type.
|
|
|
2157 |
*/
|
|
|
2158 |
exports.transformTo = function(outputType, input) {
|
|
|
2159 |
if (!input) {
|
|
|
2160 |
// undefined, null, etc
|
|
|
2161 |
// an empty string won't harm.
|
|
|
2162 |
input = "";
|
|
|
2163 |
}
|
|
|
2164 |
if (!outputType) {
|
|
|
2165 |
return input;
|
|
|
2166 |
}
|
|
|
2167 |
exports.checkSupport(outputType);
|
|
|
2168 |
var inputType = exports.getTypeOf(input);
|
|
|
2169 |
var result = transform[inputType][outputType](input);
|
|
|
2170 |
return result;
|
|
|
2171 |
};
|
|
|
2172 |
|
|
|
2173 |
/**
|
|
|
2174 |
* Return the type of the input.
|
|
|
2175 |
* The type will be in a format valid for JSZip.utils.transformTo : string, array, uint8array, arraybuffer.
|
|
|
2176 |
* @param {Object} input the input to identify.
|
|
|
2177 |
* @return {String} the (lowercase) type of the input.
|
|
|
2178 |
*/
|
|
|
2179 |
exports.getTypeOf = function(input) {
|
|
|
2180 |
if (typeof input === "string") {
|
|
|
2181 |
return "string";
|
|
|
2182 |
}
|
|
|
2183 |
if (Object.prototype.toString.call(input) === "[object Array]") {
|
|
|
2184 |
return "array";
|
|
|
2185 |
}
|
|
|
2186 |
if (support.nodebuffer && nodeBuffer.test(input)) {
|
|
|
2187 |
return "nodebuffer";
|
|
|
2188 |
}
|
|
|
2189 |
if (support.uint8array && input instanceof Uint8Array) {
|
|
|
2190 |
return "uint8array";
|
|
|
2191 |
}
|
|
|
2192 |
if (support.arraybuffer && input instanceof ArrayBuffer) {
|
|
|
2193 |
return "arraybuffer";
|
|
|
2194 |
}
|
|
|
2195 |
};
|
|
|
2196 |
|
|
|
2197 |
/**
|
|
|
2198 |
* Throw an exception if the type is not supported.
|
|
|
2199 |
* @param {String} type the type to check.
|
|
|
2200 |
* @throws {Error} an Error if the browser doesn't support the requested type.
|
|
|
2201 |
*/
|
|
|
2202 |
exports.checkSupport = function(type) {
|
|
|
2203 |
var supported = support[type.toLowerCase()];
|
|
|
2204 |
if (!supported) {
|
|
|
2205 |
throw new Error(type + " is not supported by this browser");
|
|
|
2206 |
}
|
|
|
2207 |
};
|
|
|
2208 |
exports.MAX_VALUE_16BITS = 65535;
|
|
|
2209 |
exports.MAX_VALUE_32BITS = -1; // well, "\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF" is parsed as -1
|
|
|
2210 |
|
|
|
2211 |
/**
|
|
|
2212 |
* Prettify a string read as binary.
|
|
|
2213 |
* @param {string} str the string to prettify.
|
|
|
2214 |
* @return {string} a pretty string.
|
|
|
2215 |
*/
|
|
|
2216 |
exports.pretty = function(str) {
|
|
|
2217 |
var res = '',
|
|
|
2218 |
code, i;
|
|
|
2219 |
for (i = 0; i < (str || "").length; i++) {
|
|
|
2220 |
code = str.charCodeAt(i);
|
|
|
2221 |
res += '\\x' + (code < 16 ? "0" : "") + code.toString(16).toUpperCase();
|
|
|
2222 |
}
|
|
|
2223 |
return res;
|
|
|
2224 |
};
|
|
|
2225 |
|
|
|
2226 |
/**
|
|
|
2227 |
* Find a compression registered in JSZip.
|
|
|
2228 |
* @param {string} compressionMethod the method magic to find.
|
|
|
2229 |
* @return {Object|null} the JSZip compression object, null if none found.
|
|
|
2230 |
*/
|
|
|
2231 |
exports.findCompression = function(compressionMethod) {
|
|
|
2232 |
for (var method in compressions) {
|
|
|
2233 |
if (!compressions.hasOwnProperty(method)) {
|
|
|
2234 |
continue;
|
|
|
2235 |
}
|
|
|
2236 |
if (compressions[method].magic === compressionMethod) {
|
|
|
2237 |
return compressions[method];
|
|
|
2238 |
}
|
|
|
2239 |
}
|
|
|
2240 |
return null;
|
|
|
2241 |
};
|
|
|
2242 |
/**
|
|
|
2243 |
* Cross-window, cross-Node-context regular expression detection
|
|
|
2244 |
* @param {Object} object Anything
|
|
|
2245 |
* @return {Boolean} true if the object is a regular expression,
|
|
|
2246 |
* false otherwise
|
|
|
2247 |
*/
|
|
|
2248 |
exports.isRegExp = function (object) {
|
|
|
2249 |
return Object.prototype.toString.call(object) === "[object RegExp]";
|
|
|
2250 |
};
|
|
|
2251 |
|
|
|
2252 |
|
|
|
2253 |
},{"./compressions":3,"./nodeBuffer":11,"./support":17}],22:[function(_dereq_,module,exports){
|
|
|
2254 |
'use strict';
|
|
|
2255 |
var StringReader = _dereq_('./stringReader');
|
|
|
2256 |
var NodeBufferReader = _dereq_('./nodeBufferReader');
|
|
|
2257 |
var Uint8ArrayReader = _dereq_('./uint8ArrayReader');
|
|
|
2258 |
var utils = _dereq_('./utils');
|
|
|
2259 |
var sig = _dereq_('./signature');
|
|
|
2260 |
var ZipEntry = _dereq_('./zipEntry');
|
|
|
2261 |
var support = _dereq_('./support');
|
|
|
2262 |
var jszipProto = _dereq_('./object');
|
|
|
2263 |
// class ZipEntries {{{
|
|
|
2264 |
/**
|
|
|
2265 |
* All the entries in the zip file.
|
|
|
2266 |
* @constructor
|
|
|
2267 |
* @param {String|ArrayBuffer|Uint8Array} data the binary stream to load.
|
|
|
2268 |
* @param {Object} loadOptions Options for loading the stream.
|
|
|
2269 |
*/
|
|
|
2270 |
function ZipEntries(data, loadOptions) {
|
|
|
2271 |
this.files = [];
|
|
|
2272 |
this.loadOptions = loadOptions;
|
|
|
2273 |
if (data) {
|
|
|
2274 |
this.load(data);
|
|
|
2275 |
}
|
|
|
2276 |
}
|
|
|
2277 |
ZipEntries.prototype = {
|
|
|
2278 |
/**
|
|
|
2279 |
* Check that the reader is on the speficied signature.
|
|
|
2280 |
* @param {string} expectedSignature the expected signature.
|
|
|
2281 |
* @throws {Error} if it is an other signature.
|
|
|
2282 |
*/
|
|
|
2283 |
checkSignature: function(expectedSignature) {
|
|
|
2284 |
var signature = this.reader.readString(4);
|
|
|
2285 |
if (signature !== expectedSignature) {
|
|
|
2286 |
throw new Error("Corrupted zip or bug : unexpected signature " + "(" + utils.pretty(signature) + ", expected " + utils.pretty(expectedSignature) + ")");
|
|
|
2287 |
}
|
|
|
2288 |
},
|
|
|
2289 |
/**
|
|
|
2290 |
* Read the end of the central directory.
|
|
|
2291 |
*/
|
|
|
2292 |
readBlockEndOfCentral: function() {
|
|
|
2293 |
this.diskNumber = this.reader.readInt(2);
|
|
|
2294 |
this.diskWithCentralDirStart = this.reader.readInt(2);
|
|
|
2295 |
this.centralDirRecordsOnThisDisk = this.reader.readInt(2);
|
|
|
2296 |
this.centralDirRecords = this.reader.readInt(2);
|
|
|
2297 |
this.centralDirSize = this.reader.readInt(4);
|
|
|
2298 |
this.centralDirOffset = this.reader.readInt(4);
|
|
|
2299 |
|
|
|
2300 |
this.zipCommentLength = this.reader.readInt(2);
|
|
|
2301 |
// warning : the encoding depends of the system locale
|
|
|
2302 |
// On a linux machine with LANG=en_US.utf8, this field is utf8 encoded.
|
|
|
2303 |
// On a windows machine, this field is encoded with the localized windows code page.
|
|
|
2304 |
this.zipComment = this.reader.readString(this.zipCommentLength);
|
|
|
2305 |
// To get consistent behavior with the generation part, we will assume that
|
|
|
2306 |
// this is utf8 encoded.
|
|
|
2307 |
this.zipComment = jszipProto.utf8decode(this.zipComment);
|
|
|
2308 |
},
|
|
|
2309 |
/**
|
|
|
2310 |
* Read the end of the Zip 64 central directory.
|
|
|
2311 |
* Not merged with the method readEndOfCentral :
|
|
|
2312 |
* The end of central can coexist with its Zip64 brother,
|
|
|
2313 |
* I don't want to read the wrong number of bytes !
|
|
|
2314 |
*/
|
|
|
2315 |
readBlockZip64EndOfCentral: function() {
|
|
|
2316 |
this.zip64EndOfCentralSize = this.reader.readInt(8);
|
|
|
2317 |
this.versionMadeBy = this.reader.readString(2);
|
|
|
2318 |
this.versionNeeded = this.reader.readInt(2);
|
|
|
2319 |
this.diskNumber = this.reader.readInt(4);
|
|
|
2320 |
this.diskWithCentralDirStart = this.reader.readInt(4);
|
|
|
2321 |
this.centralDirRecordsOnThisDisk = this.reader.readInt(8);
|
|
|
2322 |
this.centralDirRecords = this.reader.readInt(8);
|
|
|
2323 |
this.centralDirSize = this.reader.readInt(8);
|
|
|
2324 |
this.centralDirOffset = this.reader.readInt(8);
|
|
|
2325 |
|
|
|
2326 |
this.zip64ExtensibleData = {};
|
|
|
2327 |
var extraDataSize = this.zip64EndOfCentralSize - 44,
|
|
|
2328 |
index = 0,
|
|
|
2329 |
extraFieldId,
|
|
|
2330 |
extraFieldLength,
|
|
|
2331 |
extraFieldValue;
|
|
|
2332 |
while (index < extraDataSize) {
|
|
|
2333 |
extraFieldId = this.reader.readInt(2);
|
|
|
2334 |
extraFieldLength = this.reader.readInt(4);
|
|
|
2335 |
extraFieldValue = this.reader.readString(extraFieldLength);
|
|
|
2336 |
this.zip64ExtensibleData[extraFieldId] = {
|
|
|
2337 |
id: extraFieldId,
|
|
|
2338 |
length: extraFieldLength,
|
|
|
2339 |
value: extraFieldValue
|
|
|
2340 |
};
|
|
|
2341 |
}
|
|
|
2342 |
},
|
|
|
2343 |
/**
|
|
|
2344 |
* Read the end of the Zip 64 central directory locator.
|
|
|
2345 |
*/
|
|
|
2346 |
readBlockZip64EndOfCentralLocator: function() {
|
|
|
2347 |
this.diskWithZip64CentralDirStart = this.reader.readInt(4);
|
|
|
2348 |
this.relativeOffsetEndOfZip64CentralDir = this.reader.readInt(8);
|
|
|
2349 |
this.disksCount = this.reader.readInt(4);
|
|
|
2350 |
if (this.disksCount > 1) {
|
|
|
2351 |
throw new Error("Multi-volumes zip are not supported");
|
|
|
2352 |
}
|
|
|
2353 |
},
|
|
|
2354 |
/**
|
|
|
2355 |
* Read the local files, based on the offset read in the central part.
|
|
|
2356 |
*/
|
|
|
2357 |
readLocalFiles: function() {
|
|
|
2358 |
var i, file;
|
|
|
2359 |
for (i = 0; i < this.files.length; i++) {
|
|
|
2360 |
file = this.files[i];
|
|
|
2361 |
this.reader.setIndex(file.localHeaderOffset);
|
|
|
2362 |
this.checkSignature(sig.LOCAL_FILE_HEADER);
|
|
|
2363 |
file.readLocalPart(this.reader);
|
|
|
2364 |
file.handleUTF8();
|
|
|
2365 |
file.processAttributes();
|
|
|
2366 |
}
|
|
|
2367 |
},
|
|
|
2368 |
/**
|
|
|
2369 |
* Read the central directory.
|
|
|
2370 |
*/
|
|
|
2371 |
readCentralDir: function() {
|
|
|
2372 |
var file;
|
|
|
2373 |
|
|
|
2374 |
this.reader.setIndex(this.centralDirOffset);
|
|
|
2375 |
while (this.reader.readString(4) === sig.CENTRAL_FILE_HEADER) {
|
|
|
2376 |
file = new ZipEntry({
|
|
|
2377 |
zip64: this.zip64
|
|
|
2378 |
}, this.loadOptions);
|
|
|
2379 |
file.readCentralPart(this.reader);
|
|
|
2380 |
this.files.push(file);
|
|
|
2381 |
}
|
|
|
2382 |
},
|
|
|
2383 |
/**
|
|
|
2384 |
* Read the end of central directory.
|
|
|
2385 |
*/
|
|
|
2386 |
readEndOfCentral: function() {
|
|
|
2387 |
var offset = this.reader.lastIndexOfSignature(sig.CENTRAL_DIRECTORY_END);
|
|
|
2388 |
if (offset === -1) {
|
|
|
2389 |
// Check if the content is a truncated zip or complete garbage.
|
|
|
2390 |
// A "LOCAL_FILE_HEADER" is not required at the beginning (auto
|
|
|
2391 |
// extractible zip for example) but it can give a good hint.
|
|
|
2392 |
// If an ajax request was used without responseType, we will also
|
|
|
2393 |
// get unreadable data.
|
|
|
2394 |
var isGarbage = true;
|
|
|
2395 |
try {
|
|
|
2396 |
this.reader.setIndex(0);
|
|
|
2397 |
this.checkSignature(sig.LOCAL_FILE_HEADER);
|
|
|
2398 |
isGarbage = false;
|
|
|
2399 |
} catch (e) {}
|
|
|
2400 |
|
|
|
2401 |
if (isGarbage) {
|
|
|
2402 |
throw new Error("Can't find end of central directory : is this a zip file ? " +
|
|
|
2403 |
"If it is, see http://stuk.github.io/jszip/documentation/howto/read_zip.html");
|
|
|
2404 |
} else {
|
|
|
2405 |
throw new Error("Corrupted zip : can't find end of central directory");
|
|
|
2406 |
}
|
|
|
2407 |
}
|
|
|
2408 |
this.reader.setIndex(offset);
|
|
|
2409 |
this.checkSignature(sig.CENTRAL_DIRECTORY_END);
|
|
|
2410 |
this.readBlockEndOfCentral();
|
|
|
2411 |
|
|
|
2412 |
|
|
|
2413 |
/* extract from the zip spec :
|
|
|
2414 |
4) If one of the fields in the end of central directory
|
|
|
2415 |
record is too small to hold required data, the field
|
|
|
2416 |
should be set to -1 (0xFFFF or 0xFFFFFFFF) and the
|
|
|
2417 |
ZIP64 format record should be created.
|
|
|
2418 |
5) The end of central directory record and the
|
|
|
2419 |
Zip64 end of central directory locator record must
|
|
|
2420 |
reside on the same disk when splitting or spanning
|
|
|
2421 |
an archive.
|
|
|
2422 |
*/
|
|
|
2423 |
if (this.diskNumber === utils.MAX_VALUE_16BITS || this.diskWithCentralDirStart === utils.MAX_VALUE_16BITS || this.centralDirRecordsOnThisDisk === utils.MAX_VALUE_16BITS || this.centralDirRecords === utils.MAX_VALUE_16BITS || this.centralDirSize === utils.MAX_VALUE_32BITS || this.centralDirOffset === utils.MAX_VALUE_32BITS) {
|
|
|
2424 |
this.zip64 = true;
|
|
|
2425 |
|
|
|
2426 |
/*
|
|
|
2427 |
Warning : the zip64 extension is supported, but ONLY if the 64bits integer read from
|
|
|
2428 |
the zip file can fit into a 32bits integer. This cannot be solved : Javascript represents
|
|
|
2429 |
all numbers as 64-bit double precision IEEE 754 floating point numbers.
|
|
|
2430 |
So, we have 53bits for integers and bitwise operations treat everything as 32bits.
|
|
|
2431 |
see https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Operators/Bitwise_Operators
|
|
|
2432 |
and http://www.ecma-international.org/publications/files/ECMA-ST/ECMA-262.pdf section 8.5
|
|
|
2433 |
*/
|
|
|
2434 |
|
|
|
2435 |
// should look for a zip64 EOCD locator
|
|
|
2436 |
offset = this.reader.lastIndexOfSignature(sig.ZIP64_CENTRAL_DIRECTORY_LOCATOR);
|
|
|
2437 |
if (offset === -1) {
|
|
|
2438 |
throw new Error("Corrupted zip : can't find the ZIP64 end of central directory locator");
|
|
|
2439 |
}
|
|
|
2440 |
this.reader.setIndex(offset);
|
|
|
2441 |
this.checkSignature(sig.ZIP64_CENTRAL_DIRECTORY_LOCATOR);
|
|
|
2442 |
this.readBlockZip64EndOfCentralLocator();
|
|
|
2443 |
|
|
|
2444 |
// now the zip64 EOCD record
|
|
|
2445 |
this.reader.setIndex(this.relativeOffsetEndOfZip64CentralDir);
|
|
|
2446 |
this.checkSignature(sig.ZIP64_CENTRAL_DIRECTORY_END);
|
|
|
2447 |
this.readBlockZip64EndOfCentral();
|
|
|
2448 |
}
|
|
|
2449 |
},
|
|
|
2450 |
prepareReader: function(data) {
|
|
|
2451 |
var type = utils.getTypeOf(data);
|
|
|
2452 |
if (type === "string" && !support.uint8array) {
|
|
|
2453 |
this.reader = new StringReader(data, this.loadOptions.optimizedBinaryString);
|
|
|
2454 |
}
|
|
|
2455 |
else if (type === "nodebuffer") {
|
|
|
2456 |
this.reader = new NodeBufferReader(data);
|
|
|
2457 |
}
|
|
|
2458 |
else {
|
|
|
2459 |
this.reader = new Uint8ArrayReader(utils.transformTo("uint8array", data));
|
|
|
2460 |
}
|
|
|
2461 |
},
|
|
|
2462 |
/**
|
|
|
2463 |
* Read a zip file and create ZipEntries.
|
|
|
2464 |
* @param {String|ArrayBuffer|Uint8Array|Buffer} data the binary string representing a zip file.
|
|
|
2465 |
*/
|
|
|
2466 |
load: function(data) {
|
|
|
2467 |
this.prepareReader(data);
|
|
|
2468 |
this.readEndOfCentral();
|
|
|
2469 |
this.readCentralDir();
|
|
|
2470 |
this.readLocalFiles();
|
|
|
2471 |
}
|
|
|
2472 |
};
|
|
|
2473 |
// }}} end of ZipEntries
|
|
|
2474 |
module.exports = ZipEntries;
|
|
|
2475 |
|
|
|
2476 |
},{"./nodeBufferReader":12,"./object":13,"./signature":14,"./stringReader":15,"./support":17,"./uint8ArrayReader":18,"./utils":21,"./zipEntry":23}],23:[function(_dereq_,module,exports){
|
|
|
2477 |
'use strict';
|
|
|
2478 |
var StringReader = _dereq_('./stringReader');
|
|
|
2479 |
var utils = _dereq_('./utils');
|
|
|
2480 |
var CompressedObject = _dereq_('./compressedObject');
|
|
|
2481 |
var jszipProto = _dereq_('./object');
|
|
|
2482 |
|
|
|
2483 |
var MADE_BY_DOS = 0x00;
|
|
|
2484 |
var MADE_BY_UNIX = 0x03;
|
|
|
2485 |
|
|
|
2486 |
// class ZipEntry {{{
|
|
|
2487 |
/**
|
|
|
2488 |
* An entry in the zip file.
|
|
|
2489 |
* @constructor
|
|
|
2490 |
* @param {Object} options Options of the current file.
|
|
|
2491 |
* @param {Object} loadOptions Options for loading the stream.
|
|
|
2492 |
*/
|
|
|
2493 |
function ZipEntry(options, loadOptions) {
|
|
|
2494 |
this.options = options;
|
|
|
2495 |
this.loadOptions = loadOptions;
|
|
|
2496 |
}
|
|
|
2497 |
ZipEntry.prototype = {
|
|
|
2498 |
/**
|
|
|
2499 |
* say if the file is encrypted.
|
|
|
2500 |
* @return {boolean} true if the file is encrypted, false otherwise.
|
|
|
2501 |
*/
|
|
|
2502 |
isEncrypted: function() {
|
|
|
2503 |
// bit 1 is set
|
|
|
2504 |
return (this.bitFlag & 0x0001) === 0x0001;
|
|
|
2505 |
},
|
|
|
2506 |
/**
|
|
|
2507 |
* say if the file has utf-8 filename/comment.
|
|
|
2508 |
* @return {boolean} true if the filename/comment is in utf-8, false otherwise.
|
|
|
2509 |
*/
|
|
|
2510 |
useUTF8: function() {
|
|
|
2511 |
// bit 11 is set
|
|
|
2512 |
return (this.bitFlag & 0x0800) === 0x0800;
|
|
|
2513 |
},
|
|
|
2514 |
/**
|
|
|
2515 |
* Prepare the function used to generate the compressed content from this ZipFile.
|
|
|
2516 |
* @param {DataReader} reader the reader to use.
|
|
|
2517 |
* @param {number} from the offset from where we should read the data.
|
|
|
2518 |
* @param {number} length the length of the data to read.
|
|
|
2519 |
* @return {Function} the callback to get the compressed content (the type depends of the DataReader class).
|
|
|
2520 |
*/
|
|
|
2521 |
prepareCompressedContent: function(reader, from, length) {
|
|
|
2522 |
return function() {
|
|
|
2523 |
var previousIndex = reader.index;
|
|
|
2524 |
reader.setIndex(from);
|
|
|
2525 |
var compressedFileData = reader.readData(length);
|
|
|
2526 |
reader.setIndex(previousIndex);
|
|
|
2527 |
|
|
|
2528 |
return compressedFileData;
|
|
|
2529 |
};
|
|
|
2530 |
},
|
|
|
2531 |
/**
|
|
|
2532 |
* Prepare the function used to generate the uncompressed content from this ZipFile.
|
|
|
2533 |
* @param {DataReader} reader the reader to use.
|
|
|
2534 |
* @param {number} from the offset from where we should read the data.
|
|
|
2535 |
* @param {number} length the length of the data to read.
|
|
|
2536 |
* @param {JSZip.compression} compression the compression used on this file.
|
|
|
2537 |
* @param {number} uncompressedSize the uncompressed size to expect.
|
|
|
2538 |
* @return {Function} the callback to get the uncompressed content (the type depends of the DataReader class).
|
|
|
2539 |
*/
|
|
|
2540 |
prepareContent: function(reader, from, length, compression, uncompressedSize) {
|
|
|
2541 |
return function() {
|
|
|
2542 |
|
|
|
2543 |
var compressedFileData = utils.transformTo(compression.uncompressInputType, this.getCompressedContent());
|
|
|
2544 |
var uncompressedFileData = compression.uncompress(compressedFileData);
|
|
|
2545 |
|
|
|
2546 |
if (uncompressedFileData.length !== uncompressedSize) {
|
|
|
2547 |
throw new Error("Bug : uncompressed data size mismatch");
|
|
|
2548 |
}
|
|
|
2549 |
|
|
|
2550 |
return uncompressedFileData;
|
|
|
2551 |
};
|
|
|
2552 |
},
|
|
|
2553 |
/**
|
|
|
2554 |
* Read the local part of a zip file and add the info in this object.
|
|
|
2555 |
* @param {DataReader} reader the reader to use.
|
|
|
2556 |
*/
|
|
|
2557 |
readLocalPart: function(reader) {
|
|
|
2558 |
var compression, localExtraFieldsLength;
|
|
|
2559 |
|
|
|
2560 |
// we already know everything from the central dir !
|
|
|
2561 |
// If the central dir data are false, we are doomed.
|
|
|
2562 |
// On the bright side, the local part is scary : zip64, data descriptors, both, etc.
|
|
|
2563 |
// The less data we get here, the more reliable this should be.
|
|
|
2564 |
// Let's skip the whole header and dash to the data !
|
|
|
2565 |
reader.skip(22);
|
|
|
2566 |
// in some zip created on windows, the filename stored in the central dir contains \ instead of /.
|
|
|
2567 |
// Strangely, the filename here is OK.
|
|
|
2568 |
// I would love to treat these zip files as corrupted (see http://www.info-zip.org/FAQ.html#backslashes
|
|
|
2569 |
// or APPNOTE#4.4.17.1, "All slashes MUST be forward slashes '/'") but there are a lot of bad zip generators...
|
|
|
2570 |
// Search "unzip mismatching "local" filename continuing with "central" filename version" on
|
|
|
2571 |
// the internet.
|
|
|
2572 |
//
|
|
|
2573 |
// I think I see the logic here : the central directory is used to display
|
|
|
2574 |
// content and the local directory is used to extract the files. Mixing / and \
|
|
|
2575 |
// may be used to display \ to windows users and use / when extracting the files.
|
|
|
2576 |
// Unfortunately, this lead also to some issues : http://seclists.org/fulldisclosure/2009/Sep/394
|
|
|
2577 |
this.fileNameLength = reader.readInt(2);
|
|
|
2578 |
localExtraFieldsLength = reader.readInt(2); // can't be sure this will be the same as the central dir
|
|
|
2579 |
this.fileName = reader.readString(this.fileNameLength);
|
|
|
2580 |
reader.skip(localExtraFieldsLength);
|
|
|
2581 |
|
|
|
2582 |
if (this.compressedSize == -1 || this.uncompressedSize == -1) {
|
|
|
2583 |
throw new Error("Bug or corrupted zip : didn't get enough informations from the central directory " + "(compressedSize == -1 || uncompressedSize == -1)");
|
|
|
2584 |
}
|
|
|
2585 |
|
|
|
2586 |
compression = utils.findCompression(this.compressionMethod);
|
|
|
2587 |
if (compression === null) { // no compression found
|
|
|
2588 |
throw new Error("Corrupted zip : compression " + utils.pretty(this.compressionMethod) + " unknown (inner file : " + this.fileName + ")");
|
|
|
2589 |
}
|
|
|
2590 |
this.decompressed = new CompressedObject();
|
|
|
2591 |
this.decompressed.compressedSize = this.compressedSize;
|
|
|
2592 |
this.decompressed.uncompressedSize = this.uncompressedSize;
|
|
|
2593 |
this.decompressed.crc32 = this.crc32;
|
|
|
2594 |
this.decompressed.compressionMethod = this.compressionMethod;
|
|
|
2595 |
this.decompressed.getCompressedContent = this.prepareCompressedContent(reader, reader.index, this.compressedSize, compression);
|
|
|
2596 |
this.decompressed.getContent = this.prepareContent(reader, reader.index, this.compressedSize, compression, this.uncompressedSize);
|
|
|
2597 |
|
|
|
2598 |
// we need to compute the crc32...
|
|
|
2599 |
if (this.loadOptions.checkCRC32) {
|
|
|
2600 |
this.decompressed = utils.transformTo("string", this.decompressed.getContent());
|
|
|
2601 |
if (jszipProto.crc32(this.decompressed) !== this.crc32) {
|
|
|
2602 |
throw new Error("Corrupted zip : CRC32 mismatch");
|
|
|
2603 |
}
|
|
|
2604 |
}
|
|
|
2605 |
},
|
|
|
2606 |
|
|
|
2607 |
/**
|
|
|
2608 |
* Read the central part of a zip file and add the info in this object.
|
|
|
2609 |
* @param {DataReader} reader the reader to use.
|
|
|
2610 |
*/
|
|
|
2611 |
readCentralPart: function(reader) {
|
|
|
2612 |
this.versionMadeBy = reader.readInt(2);
|
|
|
2613 |
this.versionNeeded = reader.readInt(2);
|
|
|
2614 |
this.bitFlag = reader.readInt(2);
|
|
|
2615 |
this.compressionMethod = reader.readString(2);
|
|
|
2616 |
this.date = reader.readDate();
|
|
|
2617 |
this.crc32 = reader.readInt(4);
|
|
|
2618 |
this.compressedSize = reader.readInt(4);
|
|
|
2619 |
this.uncompressedSize = reader.readInt(4);
|
|
|
2620 |
this.fileNameLength = reader.readInt(2);
|
|
|
2621 |
this.extraFieldsLength = reader.readInt(2);
|
|
|
2622 |
this.fileCommentLength = reader.readInt(2);
|
|
|
2623 |
this.diskNumberStart = reader.readInt(2);
|
|
|
2624 |
this.internalFileAttributes = reader.readInt(2);
|
|
|
2625 |
this.externalFileAttributes = reader.readInt(4);
|
|
|
2626 |
this.localHeaderOffset = reader.readInt(4);
|
|
|
2627 |
|
|
|
2628 |
if (this.isEncrypted()) {
|
|
|
2629 |
throw new Error("Encrypted zip are not supported");
|
|
|
2630 |
}
|
|
|
2631 |
|
|
|
2632 |
this.fileName = reader.readString(this.fileNameLength);
|
|
|
2633 |
this.readExtraFields(reader);
|
|
|
2634 |
this.parseZIP64ExtraField(reader);
|
|
|
2635 |
this.fileComment = reader.readString(this.fileCommentLength);
|
|
|
2636 |
},
|
|
|
2637 |
|
|
|
2638 |
/**
|
|
|
2639 |
* Parse the external file attributes and get the unix/dos permissions.
|
|
|
2640 |
*/
|
|
|
2641 |
processAttributes: function () {
|
|
|
2642 |
this.unixPermissions = null;
|
|
|
2643 |
this.dosPermissions = null;
|
|
|
2644 |
var madeBy = this.versionMadeBy >> 8;
|
|
|
2645 |
|
|
|
2646 |
// Check if we have the DOS directory flag set.
|
|
|
2647 |
// We look for it in the DOS and UNIX permissions
|
|
|
2648 |
// but some unknown platform could set it as a compatibility flag.
|
|
|
2649 |
this.dir = this.externalFileAttributes & 0x0010 ? true : false;
|
|
|
2650 |
|
|
|
2651 |
if(madeBy === MADE_BY_DOS) {
|
|
|
2652 |
// first 6 bits (0 to 5)
|
|
|
2653 |
this.dosPermissions = this.externalFileAttributes & 0x3F;
|
|
|
2654 |
}
|
|
|
2655 |
|
|
|
2656 |
if(madeBy === MADE_BY_UNIX) {
|
|
|
2657 |
this.unixPermissions = (this.externalFileAttributes >> 16) & 0xFFFF;
|
|
|
2658 |
// the octal permissions are in (this.unixPermissions & 0x01FF).toString(8);
|
|
|
2659 |
}
|
|
|
2660 |
|
|
|
2661 |
// fail safe : if the name ends with a / it probably means a folder
|
|
|
2662 |
if (!this.dir && this.fileName.slice(-1) === '/') {
|
|
|
2663 |
this.dir = true;
|
|
|
2664 |
}
|
|
|
2665 |
},
|
|
|
2666 |
|
|
|
2667 |
/**
|
|
|
2668 |
* Parse the ZIP64 extra field and merge the info in the current ZipEntry.
|
|
|
2669 |
* @param {DataReader} reader the reader to use.
|
|
|
2670 |
*/
|
|
|
2671 |
parseZIP64ExtraField: function(reader) {
|
|
|
2672 |
|
|
|
2673 |
if (!this.extraFields[0x0001]) {
|
|
|
2674 |
return;
|
|
|
2675 |
}
|
|
|
2676 |
|
|
|
2677 |
// should be something, preparing the extra reader
|
|
|
2678 |
var extraReader = new StringReader(this.extraFields[0x0001].value);
|
|
|
2679 |
|
|
|
2680 |
// I really hope that these 64bits integer can fit in 32 bits integer, because js
|
|
|
2681 |
// won't let us have more.
|
|
|
2682 |
if (this.uncompressedSize === utils.MAX_VALUE_32BITS) {
|
|
|
2683 |
this.uncompressedSize = extraReader.readInt(8);
|
|
|
2684 |
}
|
|
|
2685 |
if (this.compressedSize === utils.MAX_VALUE_32BITS) {
|
|
|
2686 |
this.compressedSize = extraReader.readInt(8);
|
|
|
2687 |
}
|
|
|
2688 |
if (this.localHeaderOffset === utils.MAX_VALUE_32BITS) {
|
|
|
2689 |
this.localHeaderOffset = extraReader.readInt(8);
|
|
|
2690 |
}
|
|
|
2691 |
if (this.diskNumberStart === utils.MAX_VALUE_32BITS) {
|
|
|
2692 |
this.diskNumberStart = extraReader.readInt(4);
|
|
|
2693 |
}
|
|
|
2694 |
},
|
|
|
2695 |
/**
|
|
|
2696 |
* Read the central part of a zip file and add the info in this object.
|
|
|
2697 |
* @param {DataReader} reader the reader to use.
|
|
|
2698 |
*/
|
|
|
2699 |
readExtraFields: function(reader) {
|
|
|
2700 |
var start = reader.index,
|
|
|
2701 |
extraFieldId,
|
|
|
2702 |
extraFieldLength,
|
|
|
2703 |
extraFieldValue;
|
|
|
2704 |
|
|
|
2705 |
this.extraFields = this.extraFields || {};
|
|
|
2706 |
|
|
|
2707 |
while (reader.index < start + this.extraFieldsLength) {
|
|
|
2708 |
extraFieldId = reader.readInt(2);
|
|
|
2709 |
extraFieldLength = reader.readInt(2);
|
|
|
2710 |
extraFieldValue = reader.readString(extraFieldLength);
|
|
|
2711 |
|
|
|
2712 |
this.extraFields[extraFieldId] = {
|
|
|
2713 |
id: extraFieldId,
|
|
|
2714 |
length: extraFieldLength,
|
|
|
2715 |
value: extraFieldValue
|
|
|
2716 |
};
|
|
|
2717 |
}
|
|
|
2718 |
},
|
|
|
2719 |
/**
|
|
|
2720 |
* Apply an UTF8 transformation if needed.
|
|
|
2721 |
*/
|
|
|
2722 |
handleUTF8: function() {
|
|
|
2723 |
if (this.useUTF8()) {
|
|
|
2724 |
this.fileName = jszipProto.utf8decode(this.fileName);
|
|
|
2725 |
this.fileComment = jszipProto.utf8decode(this.fileComment);
|
|
|
2726 |
} else {
|
|
|
2727 |
var upath = this.findExtraFieldUnicodePath();
|
|
|
2728 |
if (upath !== null) {
|
|
|
2729 |
this.fileName = upath;
|
|
|
2730 |
}
|
|
|
2731 |
var ucomment = this.findExtraFieldUnicodeComment();
|
|
|
2732 |
if (ucomment !== null) {
|
|
|
2733 |
this.fileComment = ucomment;
|
|
|
2734 |
}
|
|
|
2735 |
}
|
|
|
2736 |
},
|
|
|
2737 |
|
|
|
2738 |
/**
|
|
|
2739 |
* Find the unicode path declared in the extra field, if any.
|
|
|
2740 |
* @return {String} the unicode path, null otherwise.
|
|
|
2741 |
*/
|
|
|
2742 |
findExtraFieldUnicodePath: function() {
|
|
|
2743 |
var upathField = this.extraFields[0x7075];
|
|
|
2744 |
if (upathField) {
|
|
|
2745 |
var extraReader = new StringReader(upathField.value);
|
|
|
2746 |
|
|
|
2747 |
// wrong version
|
|
|
2748 |
if (extraReader.readInt(1) !== 1) {
|
|
|
2749 |
return null;
|
|
|
2750 |
}
|
|
|
2751 |
|
|
|
2752 |
// the crc of the filename changed, this field is out of date.
|
|
|
2753 |
if (jszipProto.crc32(this.fileName) !== extraReader.readInt(4)) {
|
|
|
2754 |
return null;
|
|
|
2755 |
}
|
|
|
2756 |
|
|
|
2757 |
return jszipProto.utf8decode(extraReader.readString(upathField.length - 5));
|
|
|
2758 |
}
|
|
|
2759 |
return null;
|
|
|
2760 |
},
|
|
|
2761 |
|
|
|
2762 |
/**
|
|
|
2763 |
* Find the unicode comment declared in the extra field, if any.
|
|
|
2764 |
* @return {String} the unicode comment, null otherwise.
|
|
|
2765 |
*/
|
|
|
2766 |
findExtraFieldUnicodeComment: function() {
|
|
|
2767 |
var ucommentField = this.extraFields[0x6375];
|
|
|
2768 |
if (ucommentField) {
|
|
|
2769 |
var extraReader = new StringReader(ucommentField.value);
|
|
|
2770 |
|
|
|
2771 |
// wrong version
|
|
|
2772 |
if (extraReader.readInt(1) !== 1) {
|
|
|
2773 |
return null;
|
|
|
2774 |
}
|
|
|
2775 |
|
|
|
2776 |
// the crc of the comment changed, this field is out of date.
|
|
|
2777 |
if (jszipProto.crc32(this.fileComment) !== extraReader.readInt(4)) {
|
|
|
2778 |
return null;
|
|
|
2779 |
}
|
|
|
2780 |
|
|
|
2781 |
return jszipProto.utf8decode(extraReader.readString(ucommentField.length - 5));
|
|
|
2782 |
}
|
|
|
2783 |
return null;
|
|
|
2784 |
}
|
|
|
2785 |
};
|
|
|
2786 |
module.exports = ZipEntry;
|
|
|
2787 |
|
|
|
2788 |
},{"./compressedObject":2,"./object":13,"./stringReader":15,"./utils":21}],24:[function(_dereq_,module,exports){
|
|
|
2789 |
// Top level file is just a mixin of submodules & constants
|
|
|
2790 |
'use strict';
|
|
|
2791 |
|
|
|
2792 |
var assign = _dereq_('./lib/utils/common').assign;
|
|
|
2793 |
|
|
|
2794 |
var deflate = _dereq_('./lib/deflate');
|
|
|
2795 |
var inflate = _dereq_('./lib/inflate');
|
|
|
2796 |
var constants = _dereq_('./lib/zlib/constants');
|
|
|
2797 |
|
|
|
2798 |
var pako = {};
|
|
|
2799 |
|
|
|
2800 |
assign(pako, deflate, inflate, constants);
|
|
|
2801 |
|
|
|
2802 |
module.exports = pako;
|
|
|
2803 |
},{"./lib/deflate":25,"./lib/inflate":26,"./lib/utils/common":27,"./lib/zlib/constants":30}],25:[function(_dereq_,module,exports){
|
|
|
2804 |
'use strict';
|
|
|
2805 |
|
|
|
2806 |
|
|
|
2807 |
var zlib_deflate = _dereq_('./zlib/deflate.js');
|
|
|
2808 |
var utils = _dereq_('./utils/common');
|
|
|
2809 |
var strings = _dereq_('./utils/strings');
|
|
|
2810 |
var msg = _dereq_('./zlib/messages');
|
|
|
2811 |
var zstream = _dereq_('./zlib/zstream');
|
|
|
2812 |
|
|
|
2813 |
|
|
|
2814 |
/* Public constants ==========================================================*/
|
|
|
2815 |
/* ===========================================================================*/
|
|
|
2816 |
|
|
|
2817 |
var Z_NO_FLUSH = 0;
|
|
|
2818 |
var Z_FINISH = 4;
|
|
|
2819 |
|
|
|
2820 |
var Z_OK = 0;
|
|
|
2821 |
var Z_STREAM_END = 1;
|
|
|
2822 |
|
|
|
2823 |
var Z_DEFAULT_COMPRESSION = -1;
|
|
|
2824 |
|
|
|
2825 |
var Z_DEFAULT_STRATEGY = 0;
|
|
|
2826 |
|
|
|
2827 |
var Z_DEFLATED = 8;
|
|
|
2828 |
|
|
|
2829 |
/* ===========================================================================*/
|
|
|
2830 |
|
|
|
2831 |
|
|
|
2832 |
/**
|
|
|
2833 |
* class Deflate
|
|
|
2834 |
*
|
|
|
2835 |
* Generic JS-style wrapper for zlib calls. If you don't need
|
|
|
2836 |
* streaming behaviour - use more simple functions: [[deflate]],
|
|
|
2837 |
* [[deflateRaw]] and [[gzip]].
|
|
|
2838 |
**/
|
|
|
2839 |
|
|
|
2840 |
/* internal
|
|
|
2841 |
* Deflate.chunks -> Array
|
|
|
2842 |
*
|
|
|
2843 |
* Chunks of output data, if [[Deflate#onData]] not overriden.
|
|
|
2844 |
**/
|
|
|
2845 |
|
|
|
2846 |
/**
|
|
|
2847 |
* Deflate.result -> Uint8Array|Array
|
|
|
2848 |
*
|
|
|
2849 |
* Compressed result, generated by default [[Deflate#onData]]
|
|
|
2850 |
* and [[Deflate#onEnd]] handlers. Filled after you push last chunk
|
|
|
2851 |
* (call [[Deflate#push]] with `Z_FINISH` / `true` param).
|
|
|
2852 |
**/
|
|
|
2853 |
|
|
|
2854 |
/**
|
|
|
2855 |
* Deflate.err -> Number
|
|
|
2856 |
*
|
|
|
2857 |
* Error code after deflate finished. 0 (Z_OK) on success.
|
|
|
2858 |
* You will not need it in real life, because deflate errors
|
|
|
2859 |
* are possible only on wrong options or bad `onData` / `onEnd`
|
|
|
2860 |
* custom handlers.
|
|
|
2861 |
**/
|
|
|
2862 |
|
|
|
2863 |
/**
|
|
|
2864 |
* Deflate.msg -> String
|
|
|
2865 |
*
|
|
|
2866 |
* Error message, if [[Deflate.err]] != 0
|
|
|
2867 |
**/
|
|
|
2868 |
|
|
|
2869 |
|
|
|
2870 |
/**
|
|
|
2871 |
* new Deflate(options)
|
|
|
2872 |
* - options (Object): zlib deflate options.
|
|
|
2873 |
*
|
|
|
2874 |
* Creates new deflator instance with specified params. Throws exception
|
|
|
2875 |
* on bad params. Supported options:
|
|
|
2876 |
*
|
|
|
2877 |
* - `level`
|
|
|
2878 |
* - `windowBits`
|
|
|
2879 |
* - `memLevel`
|
|
|
2880 |
* - `strategy`
|
|
|
2881 |
*
|
|
|
2882 |
* [http://zlib.net/manual.html#Advanced](http://zlib.net/manual.html#Advanced)
|
|
|
2883 |
* for more information on these.
|
|
|
2884 |
*
|
|
|
2885 |
* Additional options, for internal needs:
|
|
|
2886 |
*
|
|
|
2887 |
* - `chunkSize` - size of generated data chunks (16K by default)
|
|
|
2888 |
* - `raw` (Boolean) - do raw deflate
|
|
|
2889 |
* - `gzip` (Boolean) - create gzip wrapper
|
|
|
2890 |
* - `to` (String) - if equal to 'string', then result will be "binary string"
|
|
|
2891 |
* (each char code [0..255])
|
|
|
2892 |
* - `header` (Object) - custom header for gzip
|
|
|
2893 |
* - `text` (Boolean) - true if compressed data believed to be text
|
|
|
2894 |
* - `time` (Number) - modification time, unix timestamp
|
|
|
2895 |
* - `os` (Number) - operation system code
|
|
|
2896 |
* - `extra` (Array) - array of bytes with extra data (max 65536)
|
|
|
2897 |
* - `name` (String) - file name (binary string)
|
|
|
2898 |
* - `comment` (String) - comment (binary string)
|
|
|
2899 |
* - `hcrc` (Boolean) - true if header crc should be added
|
|
|
2900 |
*
|
|
|
2901 |
* ##### Example:
|
|
|
2902 |
*
|
|
|
2903 |
* ```javascript
|
|
|
2904 |
* var pako = require('pako')
|
|
|
2905 |
* , chunk1 = Uint8Array([1,2,3,4,5,6,7,8,9])
|
|
|
2906 |
* , chunk2 = Uint8Array([10,11,12,13,14,15,16,17,18,19]);
|
|
|
2907 |
*
|
|
|
2908 |
* var deflate = new pako.Deflate({ level: 3});
|
|
|
2909 |
*
|
|
|
2910 |
* deflate.push(chunk1, false);
|
|
|
2911 |
* deflate.push(chunk2, true); // true -> last chunk
|
|
|
2912 |
*
|
|
|
2913 |
* if (deflate.err) { throw new Error(deflate.err); }
|
|
|
2914 |
*
|
|
|
2915 |
* console.log(deflate.result);
|
|
|
2916 |
* ```
|
|
|
2917 |
**/
|
|
|
2918 |
var Deflate = function(options) {
|
|
|
2919 |
|
|
|
2920 |
this.options = utils.assign({
|
|
|
2921 |
level: Z_DEFAULT_COMPRESSION,
|
|
|
2922 |
method: Z_DEFLATED,
|
|
|
2923 |
chunkSize: 16384,
|
|
|
2924 |
windowBits: 15,
|
|
|
2925 |
memLevel: 8,
|
|
|
2926 |
strategy: Z_DEFAULT_STRATEGY,
|
|
|
2927 |
to: ''
|
|
|
2928 |
}, options || {});
|
|
|
2929 |
|
|
|
2930 |
var opt = this.options;
|
|
|
2931 |
|
|
|
2932 |
if (opt.raw && (opt.windowBits > 0)) {
|
|
|
2933 |
opt.windowBits = -opt.windowBits;
|
|
|
2934 |
}
|
|
|
2935 |
|
|
|
2936 |
else if (opt.gzip && (opt.windowBits > 0) && (opt.windowBits < 16)) {
|
|
|
2937 |
opt.windowBits += 16;
|
|
|
2938 |
}
|
|
|
2939 |
|
|
|
2940 |
this.err = 0; // error code, if happens (0 = Z_OK)
|
|
|
2941 |
this.msg = ''; // error message
|
|
|
2942 |
this.ended = false; // used to avoid multiple onEnd() calls
|
|
|
2943 |
this.chunks = []; // chunks of compressed data
|
|
|
2944 |
|
|
|
2945 |
this.strm = new zstream();
|
|
|
2946 |
this.strm.avail_out = 0;
|
|
|
2947 |
|
|
|
2948 |
var status = zlib_deflate.deflateInit2(
|
|
|
2949 |
this.strm,
|
|
|
2950 |
opt.level,
|
|
|
2951 |
opt.method,
|
|
|
2952 |
opt.windowBits,
|
|
|
2953 |
opt.memLevel,
|
|
|
2954 |
opt.strategy
|
|
|
2955 |
);
|
|
|
2956 |
|
|
|
2957 |
if (status !== Z_OK) {
|
|
|
2958 |
throw new Error(msg[status]);
|
|
|
2959 |
}
|
|
|
2960 |
|
|
|
2961 |
if (opt.header) {
|
|
|
2962 |
zlib_deflate.deflateSetHeader(this.strm, opt.header);
|
|
|
2963 |
}
|
|
|
2964 |
};
|
|
|
2965 |
|
|
|
2966 |
/**
|
|
|
2967 |
* Deflate#push(data[, mode]) -> Boolean
|
|
|
2968 |
* - data (Uint8Array|Array|String): input data. Strings will be converted to
|
|
|
2969 |
* utf8 byte sequence.
|
|
|
2970 |
* - mode (Number|Boolean): 0..6 for corresponding Z_NO_FLUSH..Z_TREE modes.
|
|
|
2971 |
* See constants. Skipped or `false` means Z_NO_FLUSH, `true` meansh Z_FINISH.
|
|
|
2972 |
*
|
|
|
2973 |
* Sends input data to deflate pipe, generating [[Deflate#onData]] calls with
|
|
|
2974 |
* new compressed chunks. Returns `true` on success. The last data block must have
|
|
|
2975 |
* mode Z_FINISH (or `true`). That flush internal pending buffers and call
|
|
|
2976 |
* [[Deflate#onEnd]].
|
|
|
2977 |
*
|
|
|
2978 |
* On fail call [[Deflate#onEnd]] with error code and return false.
|
|
|
2979 |
*
|
|
|
2980 |
* We strongly recommend to use `Uint8Array` on input for best speed (output
|
|
|
2981 |
* array format is detected automatically). Also, don't skip last param and always
|
|
|
2982 |
* use the same type in your code (boolean or number). That will improve JS speed.
|
|
|
2983 |
*
|
|
|
2984 |
* For regular `Array`-s make sure all elements are [0..255].
|
|
|
2985 |
*
|
|
|
2986 |
* ##### Example
|
|
|
2987 |
*
|
|
|
2988 |
* ```javascript
|
|
|
2989 |
* push(chunk, false); // push one of data chunks
|
|
|
2990 |
* ...
|
|
|
2991 |
* push(chunk, true); // push last chunk
|
|
|
2992 |
* ```
|
|
|
2993 |
**/
|
|
|
2994 |
Deflate.prototype.push = function(data, mode) {
|
|
|
2995 |
var strm = this.strm;
|
|
|
2996 |
var chunkSize = this.options.chunkSize;
|
|
|
2997 |
var status, _mode;
|
|
|
2998 |
|
|
|
2999 |
if (this.ended) { return false; }
|
|
|
3000 |
|
|
|
3001 |
_mode = (mode === ~~mode) ? mode : ((mode === true) ? Z_FINISH : Z_NO_FLUSH);
|
|
|
3002 |
|
|
|
3003 |
// Convert data if needed
|
|
|
3004 |
if (typeof data === 'string') {
|
|
|
3005 |
// If we need to compress text, change encoding to utf8.
|
|
|
3006 |
strm.input = strings.string2buf(data);
|
|
|
3007 |
} else {
|
|
|
3008 |
strm.input = data;
|
|
|
3009 |
}
|
|
|
3010 |
|
|
|
3011 |
strm.next_in = 0;
|
|
|
3012 |
strm.avail_in = strm.input.length;
|
|
|
3013 |
|
|
|
3014 |
do {
|
|
|
3015 |
if (strm.avail_out === 0) {
|
|
|
3016 |
strm.output = new utils.Buf8(chunkSize);
|
|
|
3017 |
strm.next_out = 0;
|
|
|
3018 |
strm.avail_out = chunkSize;
|
|
|
3019 |
}
|
|
|
3020 |
status = zlib_deflate.deflate(strm, _mode); /* no bad return value */
|
|
|
3021 |
|
|
|
3022 |
if (status !== Z_STREAM_END && status !== Z_OK) {
|
|
|
3023 |
this.onEnd(status);
|
|
|
3024 |
this.ended = true;
|
|
|
3025 |
return false;
|
|
|
3026 |
}
|
|
|
3027 |
if (strm.avail_out === 0 || (strm.avail_in === 0 && _mode === Z_FINISH)) {
|
|
|
3028 |
if (this.options.to === 'string') {
|
|
|
3029 |
this.onData(strings.buf2binstring(utils.shrinkBuf(strm.output, strm.next_out)));
|
|
|
3030 |
} else {
|
|
|
3031 |
this.onData(utils.shrinkBuf(strm.output, strm.next_out));
|
|
|
3032 |
}
|
|
|
3033 |
}
|
|
|
3034 |
} while ((strm.avail_in > 0 || strm.avail_out === 0) && status !== Z_STREAM_END);
|
|
|
3035 |
|
|
|
3036 |
// Finalize on the last chunk.
|
|
|
3037 |
if (_mode === Z_FINISH) {
|
|
|
3038 |
status = zlib_deflate.deflateEnd(this.strm);
|
|
|
3039 |
this.onEnd(status);
|
|
|
3040 |
this.ended = true;
|
|
|
3041 |
return status === Z_OK;
|
|
|
3042 |
}
|
|
|
3043 |
|
|
|
3044 |
return true;
|
|
|
3045 |
};
|
|
|
3046 |
|
|
|
3047 |
|
|
|
3048 |
/**
|
|
|
3049 |
* Deflate#onData(chunk) -> Void
|
|
|
3050 |
* - chunk (Uint8Array|Array|String): ouput data. Type of array depends
|
|
|
3051 |
* on js engine support. When string output requested, each chunk
|
|
|
3052 |
* will be string.
|
|
|
3053 |
*
|
|
|
3054 |
* By default, stores data blocks in `chunks[]` property and glue
|
|
|
3055 |
* those in `onEnd`. Override this handler, if you need another behaviour.
|
|
|
3056 |
**/
|
|
|
3057 |
Deflate.prototype.onData = function(chunk) {
|
|
|
3058 |
this.chunks.push(chunk);
|
|
|
3059 |
};
|
|
|
3060 |
|
|
|
3061 |
|
|
|
3062 |
/**
|
|
|
3063 |
* Deflate#onEnd(status) -> Void
|
|
|
3064 |
* - status (Number): deflate status. 0 (Z_OK) on success,
|
|
|
3065 |
* other if not.
|
|
|
3066 |
*
|
|
|
3067 |
* Called once after you tell deflate that input stream complete
|
|
|
3068 |
* or error happenned. By default - join collected chunks,
|
|
|
3069 |
* free memory and fill `results` / `err` properties.
|
|
|
3070 |
**/
|
|
|
3071 |
Deflate.prototype.onEnd = function(status) {
|
|
|
3072 |
// On success - join
|
|
|
3073 |
if (status === Z_OK) {
|
|
|
3074 |
if (this.options.to === 'string') {
|
|
|
3075 |
this.result = this.chunks.join('');
|
|
|
3076 |
} else {
|
|
|
3077 |
this.result = utils.flattenChunks(this.chunks);
|
|
|
3078 |
}
|
|
|
3079 |
}
|
|
|
3080 |
this.chunks = [];
|
|
|
3081 |
this.err = status;
|
|
|
3082 |
this.msg = this.strm.msg;
|
|
|
3083 |
};
|
|
|
3084 |
|
|
|
3085 |
|
|
|
3086 |
/**
|
|
|
3087 |
* deflate(data[, options]) -> Uint8Array|Array|String
|
|
|
3088 |
* - data (Uint8Array|Array|String): input data to compress.
|
|
|
3089 |
* - options (Object): zlib deflate options.
|
|
|
3090 |
*
|
|
|
3091 |
* Compress `data` with deflate alrorythm and `options`.
|
|
|
3092 |
*
|
|
|
3093 |
* Supported options are:
|
|
|
3094 |
*
|
|
|
3095 |
* - level
|
|
|
3096 |
* - windowBits
|
|
|
3097 |
* - memLevel
|
|
|
3098 |
* - strategy
|
|
|
3099 |
*
|
|
|
3100 |
* [http://zlib.net/manual.html#Advanced](http://zlib.net/manual.html#Advanced)
|
|
|
3101 |
* for more information on these.
|
|
|
3102 |
*
|
|
|
3103 |
* Sugar (options):
|
|
|
3104 |
*
|
|
|
3105 |
* - `raw` (Boolean) - say that we work with raw stream, if you don't wish to specify
|
|
|
3106 |
* negative windowBits implicitly.
|
|
|
3107 |
* - `to` (String) - if equal to 'string', then result will be "binary string"
|
|
|
3108 |
* (each char code [0..255])
|
|
|
3109 |
*
|
|
|
3110 |
* ##### Example:
|
|
|
3111 |
*
|
|
|
3112 |
* ```javascript
|
|
|
3113 |
* var pako = require('pako')
|
|
|
3114 |
* , data = Uint8Array([1,2,3,4,5,6,7,8,9]);
|
|
|
3115 |
*
|
|
|
3116 |
* console.log(pako.deflate(data));
|
|
|
3117 |
* ```
|
|
|
3118 |
**/
|
|
|
3119 |
function deflate(input, options) {
|
|
|
3120 |
var deflator = new Deflate(options);
|
|
|
3121 |
|
|
|
3122 |
deflator.push(input, true);
|
|
|
3123 |
|
|
|
3124 |
// That will never happens, if you don't cheat with options :)
|
|
|
3125 |
if (deflator.err) { throw deflator.msg; }
|
|
|
3126 |
|
|
|
3127 |
return deflator.result;
|
|
|
3128 |
}
|
|
|
3129 |
|
|
|
3130 |
|
|
|
3131 |
/**
|
|
|
3132 |
* deflateRaw(data[, options]) -> Uint8Array|Array|String
|
|
|
3133 |
* - data (Uint8Array|Array|String): input data to compress.
|
|
|
3134 |
* - options (Object): zlib deflate options.
|
|
|
3135 |
*
|
|
|
3136 |
* The same as [[deflate]], but creates raw data, without wrapper
|
|
|
3137 |
* (header and adler32 crc).
|
|
|
3138 |
**/
|
|
|
3139 |
function deflateRaw(input, options) {
|
|
|
3140 |
options = options || {};
|
|
|
3141 |
options.raw = true;
|
|
|
3142 |
return deflate(input, options);
|
|
|
3143 |
}
|
|
|
3144 |
|
|
|
3145 |
|
|
|
3146 |
/**
|
|
|
3147 |
* gzip(data[, options]) -> Uint8Array|Array|String
|
|
|
3148 |
* - data (Uint8Array|Array|String): input data to compress.
|
|
|
3149 |
* - options (Object): zlib deflate options.
|
|
|
3150 |
*
|
|
|
3151 |
* The same as [[deflate]], but create gzip wrapper instead of
|
|
|
3152 |
* deflate one.
|
|
|
3153 |
**/
|
|
|
3154 |
function gzip(input, options) {
|
|
|
3155 |
options = options || {};
|
|
|
3156 |
options.gzip = true;
|
|
|
3157 |
return deflate(input, options);
|
|
|
3158 |
}
|
|
|
3159 |
|
|
|
3160 |
|
|
|
3161 |
exports.Deflate = Deflate;
|
|
|
3162 |
exports.deflate = deflate;
|
|
|
3163 |
exports.deflateRaw = deflateRaw;
|
|
|
3164 |
exports.gzip = gzip;
|
|
|
3165 |
},{"./utils/common":27,"./utils/strings":28,"./zlib/deflate.js":32,"./zlib/messages":37,"./zlib/zstream":39}],26:[function(_dereq_,module,exports){
|
|
|
3166 |
'use strict';
|
|
|
3167 |
|
|
|
3168 |
|
|
|
3169 |
var zlib_inflate = _dereq_('./zlib/inflate.js');
|
|
|
3170 |
var utils = _dereq_('./utils/common');
|
|
|
3171 |
var strings = _dereq_('./utils/strings');
|
|
|
3172 |
var c = _dereq_('./zlib/constants');
|
|
|
3173 |
var msg = _dereq_('./zlib/messages');
|
|
|
3174 |
var zstream = _dereq_('./zlib/zstream');
|
|
|
3175 |
var gzheader = _dereq_('./zlib/gzheader');
|
|
|
3176 |
|
|
|
3177 |
|
|
|
3178 |
/**
|
|
|
3179 |
* class Inflate
|
|
|
3180 |
*
|
|
|
3181 |
* Generic JS-style wrapper for zlib calls. If you don't need
|
|
|
3182 |
* streaming behaviour - use more simple functions: [[inflate]]
|
|
|
3183 |
* and [[inflateRaw]].
|
|
|
3184 |
**/
|
|
|
3185 |
|
|
|
3186 |
/* internal
|
|
|
3187 |
* inflate.chunks -> Array
|
|
|
3188 |
*
|
|
|
3189 |
* Chunks of output data, if [[Inflate#onData]] not overriden.
|
|
|
3190 |
**/
|
|
|
3191 |
|
|
|
3192 |
/**
|
|
|
3193 |
* Inflate.result -> Uint8Array|Array|String
|
|
|
3194 |
*
|
|
|
3195 |
* Uncompressed result, generated by default [[Inflate#onData]]
|
|
|
3196 |
* and [[Inflate#onEnd]] handlers. Filled after you push last chunk
|
|
|
3197 |
* (call [[Inflate#push]] with `Z_FINISH` / `true` param).
|
|
|
3198 |
**/
|
|
|
3199 |
|
|
|
3200 |
/**
|
|
|
3201 |
* Inflate.err -> Number
|
|
|
3202 |
*
|
|
|
3203 |
* Error code after inflate finished. 0 (Z_OK) on success.
|
|
|
3204 |
* Should be checked if broken data possible.
|
|
|
3205 |
**/
|
|
|
3206 |
|
|
|
3207 |
/**
|
|
|
3208 |
* Inflate.msg -> String
|
|
|
3209 |
*
|
|
|
3210 |
* Error message, if [[Inflate.err]] != 0
|
|
|
3211 |
**/
|
|
|
3212 |
|
|
|
3213 |
|
|
|
3214 |
/**
|
|
|
3215 |
* new Inflate(options)
|
|
|
3216 |
* - options (Object): zlib inflate options.
|
|
|
3217 |
*
|
|
|
3218 |
* Creates new inflator instance with specified params. Throws exception
|
|
|
3219 |
* on bad params. Supported options:
|
|
|
3220 |
*
|
|
|
3221 |
* - `windowBits`
|
|
|
3222 |
*
|
|
|
3223 |
* [http://zlib.net/manual.html#Advanced](http://zlib.net/manual.html#Advanced)
|
|
|
3224 |
* for more information on these.
|
|
|
3225 |
*
|
|
|
3226 |
* Additional options, for internal needs:
|
|
|
3227 |
*
|
|
|
3228 |
* - `chunkSize` - size of generated data chunks (16K by default)
|
|
|
3229 |
* - `raw` (Boolean) - do raw inflate
|
|
|
3230 |
* - `to` (String) - if equal to 'string', then result will be converted
|
|
|
3231 |
* from utf8 to utf16 (javascript) string. When string output requested,
|
|
|
3232 |
* chunk length can differ from `chunkSize`, depending on content.
|
|
|
3233 |
*
|
|
|
3234 |
* By default, when no options set, autodetect deflate/gzip data format via
|
|
|
3235 |
* wrapper header.
|
|
|
3236 |
*
|
|
|
3237 |
* ##### Example:
|
|
|
3238 |
*
|
|
|
3239 |
* ```javascript
|
|
|
3240 |
* var pako = require('pako')
|
|
|
3241 |
* , chunk1 = Uint8Array([1,2,3,4,5,6,7,8,9])
|
|
|
3242 |
* , chunk2 = Uint8Array([10,11,12,13,14,15,16,17,18,19]);
|
|
|
3243 |
*
|
|
|
3244 |
* var inflate = new pako.Inflate({ level: 3});
|
|
|
3245 |
*
|
|
|
3246 |
* inflate.push(chunk1, false);
|
|
|
3247 |
* inflate.push(chunk2, true); // true -> last chunk
|
|
|
3248 |
*
|
|
|
3249 |
* if (inflate.err) { throw new Error(inflate.err); }
|
|
|
3250 |
*
|
|
|
3251 |
* console.log(inflate.result);
|
|
|
3252 |
* ```
|
|
|
3253 |
**/
|
|
|
3254 |
var Inflate = function(options) {
|
|
|
3255 |
|
|
|
3256 |
this.options = utils.assign({
|
|
|
3257 |
chunkSize: 16384,
|
|
|
3258 |
windowBits: 0,
|
|
|
3259 |
to: ''
|
|
|
3260 |
}, options || {});
|
|
|
3261 |
|
|
|
3262 |
var opt = this.options;
|
|
|
3263 |
|
|
|
3264 |
// Force window size for `raw` data, if not set directly,
|
|
|
3265 |
// because we have no header for autodetect.
|
|
|
3266 |
if (opt.raw && (opt.windowBits >= 0) && (opt.windowBits < 16)) {
|
|
|
3267 |
opt.windowBits = -opt.windowBits;
|
|
|
3268 |
if (opt.windowBits === 0) { opt.windowBits = -15; }
|
|
|
3269 |
}
|
|
|
3270 |
|
|
|
3271 |
// If `windowBits` not defined (and mode not raw) - set autodetect flag for gzip/deflate
|
|
|
3272 |
if ((opt.windowBits >= 0) && (opt.windowBits < 16) &&
|
|
|
3273 |
!(options && options.windowBits)) {
|
|
|
3274 |
opt.windowBits += 32;
|
|
|
3275 |
}
|
|
|
3276 |
|
|
|
3277 |
// Gzip header has no info about windows size, we can do autodetect only
|
|
|
3278 |
// for deflate. So, if window size not set, force it to max when gzip possible
|
|
|
3279 |
if ((opt.windowBits > 15) && (opt.windowBits < 48)) {
|
|
|
3280 |
// bit 3 (16) -> gzipped data
|
|
|
3281 |
// bit 4 (32) -> autodetect gzip/deflate
|
|
|
3282 |
if ((opt.windowBits & 15) === 0) {
|
|
|
3283 |
opt.windowBits |= 15;
|
|
|
3284 |
}
|
|
|
3285 |
}
|
|
|
3286 |
|
|
|
3287 |
this.err = 0; // error code, if happens (0 = Z_OK)
|
|
|
3288 |
this.msg = ''; // error message
|
|
|
3289 |
this.ended = false; // used to avoid multiple onEnd() calls
|
|
|
3290 |
this.chunks = []; // chunks of compressed data
|
|
|
3291 |
|
|
|
3292 |
this.strm = new zstream();
|
|
|
3293 |
this.strm.avail_out = 0;
|
|
|
3294 |
|
|
|
3295 |
var status = zlib_inflate.inflateInit2(
|
|
|
3296 |
this.strm,
|
|
|
3297 |
opt.windowBits
|
|
|
3298 |
);
|
|
|
3299 |
|
|
|
3300 |
if (status !== c.Z_OK) {
|
|
|
3301 |
throw new Error(msg[status]);
|
|
|
3302 |
}
|
|
|
3303 |
|
|
|
3304 |
this.header = new gzheader();
|
|
|
3305 |
|
|
|
3306 |
zlib_inflate.inflateGetHeader(this.strm, this.header);
|
|
|
3307 |
};
|
|
|
3308 |
|
|
|
3309 |
/**
|
|
|
3310 |
* Inflate#push(data[, mode]) -> Boolean
|
|
|
3311 |
* - data (Uint8Array|Array|String): input data
|
|
|
3312 |
* - mode (Number|Boolean): 0..6 for corresponding Z_NO_FLUSH..Z_TREE modes.
|
|
|
3313 |
* See constants. Skipped or `false` means Z_NO_FLUSH, `true` meansh Z_FINISH.
|
|
|
3314 |
*
|
|
|
3315 |
* Sends input data to inflate pipe, generating [[Inflate#onData]] calls with
|
|
|
3316 |
* new output chunks. Returns `true` on success. The last data block must have
|
|
|
3317 |
* mode Z_FINISH (or `true`). That flush internal pending buffers and call
|
|
|
3318 |
* [[Inflate#onEnd]].
|
|
|
3319 |
*
|
|
|
3320 |
* On fail call [[Inflate#onEnd]] with error code and return false.
|
|
|
3321 |
*
|
|
|
3322 |
* We strongly recommend to use `Uint8Array` on input for best speed (output
|
|
|
3323 |
* format is detected automatically). Also, don't skip last param and always
|
|
|
3324 |
* use the same type in your code (boolean or number). That will improve JS speed.
|
|
|
3325 |
*
|
|
|
3326 |
* For regular `Array`-s make sure all elements are [0..255].
|
|
|
3327 |
*
|
|
|
3328 |
* ##### Example
|
|
|
3329 |
*
|
|
|
3330 |
* ```javascript
|
|
|
3331 |
* push(chunk, false); // push one of data chunks
|
|
|
3332 |
* ...
|
|
|
3333 |
* push(chunk, true); // push last chunk
|
|
|
3334 |
* ```
|
|
|
3335 |
**/
|
|
|
3336 |
Inflate.prototype.push = function(data, mode) {
|
|
|
3337 |
var strm = this.strm;
|
|
|
3338 |
var chunkSize = this.options.chunkSize;
|
|
|
3339 |
var status, _mode;
|
|
|
3340 |
var next_out_utf8, tail, utf8str;
|
|
|
3341 |
|
|
|
3342 |
if (this.ended) { return false; }
|
|
|
3343 |
_mode = (mode === ~~mode) ? mode : ((mode === true) ? c.Z_FINISH : c.Z_NO_FLUSH);
|
|
|
3344 |
|
|
|
3345 |
// Convert data if needed
|
|
|
3346 |
if (typeof data === 'string') {
|
|
|
3347 |
// Only binary strings can be decompressed on practice
|
|
|
3348 |
strm.input = strings.binstring2buf(data);
|
|
|
3349 |
} else {
|
|
|
3350 |
strm.input = data;
|
|
|
3351 |
}
|
|
|
3352 |
|
|
|
3353 |
strm.next_in = 0;
|
|
|
3354 |
strm.avail_in = strm.input.length;
|
|
|
3355 |
|
|
|
3356 |
do {
|
|
|
3357 |
if (strm.avail_out === 0) {
|
|
|
3358 |
strm.output = new utils.Buf8(chunkSize);
|
|
|
3359 |
strm.next_out = 0;
|
|
|
3360 |
strm.avail_out = chunkSize;
|
|
|
3361 |
}
|
|
|
3362 |
|
|
|
3363 |
status = zlib_inflate.inflate(strm, c.Z_NO_FLUSH); /* no bad return value */
|
|
|
3364 |
|
|
|
3365 |
if (status !== c.Z_STREAM_END && status !== c.Z_OK) {
|
|
|
3366 |
this.onEnd(status);
|
|
|
3367 |
this.ended = true;
|
|
|
3368 |
return false;
|
|
|
3369 |
}
|
|
|
3370 |
|
|
|
3371 |
if (strm.next_out) {
|
|
|
3372 |
if (strm.avail_out === 0 || status === c.Z_STREAM_END || (strm.avail_in === 0 && _mode === c.Z_FINISH)) {
|
|
|
3373 |
|
|
|
3374 |
if (this.options.to === 'string') {
|
|
|
3375 |
|
|
|
3376 |
next_out_utf8 = strings.utf8border(strm.output, strm.next_out);
|
|
|
3377 |
|
|
|
3378 |
tail = strm.next_out - next_out_utf8;
|
|
|
3379 |
utf8str = strings.buf2string(strm.output, next_out_utf8);
|
|
|
3380 |
|
|
|
3381 |
// move tail
|
|
|
3382 |
strm.next_out = tail;
|
|
|
3383 |
strm.avail_out = chunkSize - tail;
|
|
|
3384 |
if (tail) { utils.arraySet(strm.output, strm.output, next_out_utf8, tail, 0); }
|
|
|
3385 |
|
|
|
3386 |
this.onData(utf8str);
|
|
|
3387 |
|
|
|
3388 |
} else {
|
|
|
3389 |
this.onData(utils.shrinkBuf(strm.output, strm.next_out));
|
|
|
3390 |
}
|
|
|
3391 |
}
|
|
|
3392 |
}
|
|
|
3393 |
} while ((strm.avail_in > 0) && status !== c.Z_STREAM_END);
|
|
|
3394 |
|
|
|
3395 |
if (status === c.Z_STREAM_END) {
|
|
|
3396 |
_mode = c.Z_FINISH;
|
|
|
3397 |
}
|
|
|
3398 |
// Finalize on the last chunk.
|
|
|
3399 |
if (_mode === c.Z_FINISH) {
|
|
|
3400 |
status = zlib_inflate.inflateEnd(this.strm);
|
|
|
3401 |
this.onEnd(status);
|
|
|
3402 |
this.ended = true;
|
|
|
3403 |
return status === c.Z_OK;
|
|
|
3404 |
}
|
|
|
3405 |
|
|
|
3406 |
return true;
|
|
|
3407 |
};
|
|
|
3408 |
|
|
|
3409 |
|
|
|
3410 |
/**
|
|
|
3411 |
* Inflate#onData(chunk) -> Void
|
|
|
3412 |
* - chunk (Uint8Array|Array|String): ouput data. Type of array depends
|
|
|
3413 |
* on js engine support. When string output requested, each chunk
|
|
|
3414 |
* will be string.
|
|
|
3415 |
*
|
|
|
3416 |
* By default, stores data blocks in `chunks[]` property and glue
|
|
|
3417 |
* those in `onEnd`. Override this handler, if you need another behaviour.
|
|
|
3418 |
**/
|
|
|
3419 |
Inflate.prototype.onData = function(chunk) {
|
|
|
3420 |
this.chunks.push(chunk);
|
|
|
3421 |
};
|
|
|
3422 |
|
|
|
3423 |
|
|
|
3424 |
/**
|
|
|
3425 |
* Inflate#onEnd(status) -> Void
|
|
|
3426 |
* - status (Number): inflate status. 0 (Z_OK) on success,
|
|
|
3427 |
* other if not.
|
|
|
3428 |
*
|
|
|
3429 |
* Called once after you tell inflate that input stream complete
|
|
|
3430 |
* or error happenned. By default - join collected chunks,
|
|
|
3431 |
* free memory and fill `results` / `err` properties.
|
|
|
3432 |
**/
|
|
|
3433 |
Inflate.prototype.onEnd = function(status) {
|
|
|
3434 |
// On success - join
|
|
|
3435 |
if (status === c.Z_OK) {
|
|
|
3436 |
if (this.options.to === 'string') {
|
|
|
3437 |
// Glue & convert here, until we teach pako to send
|
|
|
3438 |
// utf8 alligned strings to onData
|
|
|
3439 |
this.result = this.chunks.join('');
|
|
|
3440 |
} else {
|
|
|
3441 |
this.result = utils.flattenChunks(this.chunks);
|
|
|
3442 |
}
|
|
|
3443 |
}
|
|
|
3444 |
this.chunks = [];
|
|
|
3445 |
this.err = status;
|
|
|
3446 |
this.msg = this.strm.msg;
|
|
|
3447 |
};
|
|
|
3448 |
|
|
|
3449 |
|
|
|
3450 |
/**
|
|
|
3451 |
* inflate(data[, options]) -> Uint8Array|Array|String
|
|
|
3452 |
* - data (Uint8Array|Array|String): input data to decompress.
|
|
|
3453 |
* - options (Object): zlib inflate options.
|
|
|
3454 |
*
|
|
|
3455 |
* Decompress `data` with inflate/ungzip and `options`. Autodetect
|
|
|
3456 |
* format via wrapper header by default. That's why we don't provide
|
|
|
3457 |
* separate `ungzip` method.
|
|
|
3458 |
*
|
|
|
3459 |
* Supported options are:
|
|
|
3460 |
*
|
|
|
3461 |
* - windowBits
|
|
|
3462 |
*
|
|
|
3463 |
* [http://zlib.net/manual.html#Advanced](http://zlib.net/manual.html#Advanced)
|
|
|
3464 |
* for more information.
|
|
|
3465 |
*
|
|
|
3466 |
* Sugar (options):
|
|
|
3467 |
*
|
|
|
3468 |
* - `raw` (Boolean) - say that we work with raw stream, if you don't wish to specify
|
|
|
3469 |
* negative windowBits implicitly.
|
|
|
3470 |
* - `to` (String) - if equal to 'string', then result will be converted
|
|
|
3471 |
* from utf8 to utf16 (javascript) string. When string output requested,
|
|
|
3472 |
* chunk length can differ from `chunkSize`, depending on content.
|
|
|
3473 |
*
|
|
|
3474 |
*
|
|
|
3475 |
* ##### Example:
|
|
|
3476 |
*
|
|
|
3477 |
* ```javascript
|
|
|
3478 |
* var pako = require('pako')
|
|
|
3479 |
* , input = pako.deflate([1,2,3,4,5,6,7,8,9])
|
|
|
3480 |
* , output;
|
|
|
3481 |
*
|
|
|
3482 |
* try {
|
|
|
3483 |
* output = pako.inflate(input);
|
|
|
3484 |
* } catch (err)
|
|
|
3485 |
* console.log(err);
|
|
|
3486 |
* }
|
|
|
3487 |
* ```
|
|
|
3488 |
**/
|
|
|
3489 |
function inflate(input, options) {
|
|
|
3490 |
var inflator = new Inflate(options);
|
|
|
3491 |
|
|
|
3492 |
inflator.push(input, true);
|
|
|
3493 |
|
|
|
3494 |
// That will never happens, if you don't cheat with options :)
|
|
|
3495 |
if (inflator.err) { throw inflator.msg; }
|
|
|
3496 |
|
|
|
3497 |
return inflator.result;
|
|
|
3498 |
}
|
|
|
3499 |
|
|
|
3500 |
|
|
|
3501 |
/**
|
|
|
3502 |
* inflateRaw(data[, options]) -> Uint8Array|Array|String
|
|
|
3503 |
* - data (Uint8Array|Array|String): input data to decompress.
|
|
|
3504 |
* - options (Object): zlib inflate options.
|
|
|
3505 |
*
|
|
|
3506 |
* The same as [[inflate]], but creates raw data, without wrapper
|
|
|
3507 |
* (header and adler32 crc).
|
|
|
3508 |
**/
|
|
|
3509 |
function inflateRaw(input, options) {
|
|
|
3510 |
options = options || {};
|
|
|
3511 |
options.raw = true;
|
|
|
3512 |
return inflate(input, options);
|
|
|
3513 |
}
|
|
|
3514 |
|
|
|
3515 |
|
|
|
3516 |
/**
|
|
|
3517 |
* ungzip(data[, options]) -> Uint8Array|Array|String
|
|
|
3518 |
* - data (Uint8Array|Array|String): input data to decompress.
|
|
|
3519 |
* - options (Object): zlib inflate options.
|
|
|
3520 |
*
|
|
|
3521 |
* Just shortcut to [[inflate]], because it autodetects format
|
|
|
3522 |
* by header.content. Done for convenience.
|
|
|
3523 |
**/
|
|
|
3524 |
|
|
|
3525 |
|
|
|
3526 |
exports.Inflate = Inflate;
|
|
|
3527 |
exports.inflate = inflate;
|
|
|
3528 |
exports.inflateRaw = inflateRaw;
|
|
|
3529 |
exports.ungzip = inflate;
|
|
|
3530 |
|
|
|
3531 |
},{"./utils/common":27,"./utils/strings":28,"./zlib/constants":30,"./zlib/gzheader":33,"./zlib/inflate.js":35,"./zlib/messages":37,"./zlib/zstream":39}],27:[function(_dereq_,module,exports){
|
|
|
3532 |
'use strict';
|
|
|
3533 |
|
|
|
3534 |
|
|
|
3535 |
var TYPED_OK = (typeof Uint8Array !== 'undefined') &&
|
|
|
3536 |
(typeof Uint16Array !== 'undefined') &&
|
|
|
3537 |
(typeof Int32Array !== 'undefined');
|
|
|
3538 |
|
|
|
3539 |
|
|
|
3540 |
exports.assign = function (obj /*from1, from2, from3, ...*/) {
|
|
|
3541 |
var sources = Array.prototype.slice.call(arguments, 1);
|
|
|
3542 |
while (sources.length) {
|
|
|
3543 |
var source = sources.shift();
|
|
|
3544 |
if (!source) { continue; }
|
|
|
3545 |
|
|
|
3546 |
if (typeof(source) !== 'object') {
|
|
|
3547 |
throw new TypeError(source + 'must be non-object');
|
|
|
3548 |
}
|
|
|
3549 |
|
|
|
3550 |
for (var p in source) {
|
|
|
3551 |
if (source.hasOwnProperty(p)) {
|
|
|
3552 |
obj[p] = source[p];
|
|
|
3553 |
}
|
|
|
3554 |
}
|
|
|
3555 |
}
|
|
|
3556 |
|
|
|
3557 |
return obj;
|
|
|
3558 |
};
|
|
|
3559 |
|
|
|
3560 |
|
|
|
3561 |
// reduce buffer size, avoiding mem copy
|
|
|
3562 |
exports.shrinkBuf = function (buf, size) {
|
|
|
3563 |
if (buf.length === size) { return buf; }
|
|
|
3564 |
if (buf.subarray) { return buf.subarray(0, size); }
|
|
|
3565 |
buf.length = size;
|
|
|
3566 |
return buf;
|
|
|
3567 |
};
|
|
|
3568 |
|
|
|
3569 |
|
|
|
3570 |
var fnTyped = {
|
|
|
3571 |
arraySet: function (dest, src, src_offs, len, dest_offs) {
|
|
|
3572 |
if (src.subarray && dest.subarray) {
|
|
|
3573 |
dest.set(src.subarray(src_offs, src_offs+len), dest_offs);
|
|
|
3574 |
return;
|
|
|
3575 |
}
|
|
|
3576 |
// Fallback to ordinary array
|
|
|
3577 |
for(var i=0; i<len; i++) {
|
|
|
3578 |
dest[dest_offs + i] = src[src_offs + i];
|
|
|
3579 |
}
|
|
|
3580 |
},
|
|
|
3581 |
// Join array of chunks to single array.
|
|
|
3582 |
flattenChunks: function(chunks) {
|
|
|
3583 |
var i, l, len, pos, chunk, result;
|
|
|
3584 |
|
|
|
3585 |
// calculate data length
|
|
|
3586 |
len = 0;
|
|
|
3587 |
for (i=0, l=chunks.length; i<l; i++) {
|
|
|
3588 |
len += chunks[i].length;
|
|
|
3589 |
}
|
|
|
3590 |
|
|
|
3591 |
// join chunks
|
|
|
3592 |
result = new Uint8Array(len);
|
|
|
3593 |
pos = 0;
|
|
|
3594 |
for (i=0, l=chunks.length; i<l; i++) {
|
|
|
3595 |
chunk = chunks[i];
|
|
|
3596 |
result.set(chunk, pos);
|
|
|
3597 |
pos += chunk.length;
|
|
|
3598 |
}
|
|
|
3599 |
|
|
|
3600 |
return result;
|
|
|
3601 |
}
|
|
|
3602 |
};
|
|
|
3603 |
|
|
|
3604 |
var fnUntyped = {
|
|
|
3605 |
arraySet: function (dest, src, src_offs, len, dest_offs) {
|
|
|
3606 |
for(var i=0; i<len; i++) {
|
|
|
3607 |
dest[dest_offs + i] = src[src_offs + i];
|
|
|
3608 |
}
|
|
|
3609 |
},
|
|
|
3610 |
// Join array of chunks to single array.
|
|
|
3611 |
flattenChunks: function(chunks) {
|
|
|
3612 |
return [].concat.apply([], chunks);
|
|
|
3613 |
}
|
|
|
3614 |
};
|
|
|
3615 |
|
|
|
3616 |
|
|
|
3617 |
// Enable/Disable typed arrays use, for testing
|
|
|
3618 |
//
|
|
|
3619 |
exports.setTyped = function (on) {
|
|
|
3620 |
if (on) {
|
|
|
3621 |
exports.Buf8 = Uint8Array;
|
|
|
3622 |
exports.Buf16 = Uint16Array;
|
|
|
3623 |
exports.Buf32 = Int32Array;
|
|
|
3624 |
exports.assign(exports, fnTyped);
|
|
|
3625 |
} else {
|
|
|
3626 |
exports.Buf8 = Array;
|
|
|
3627 |
exports.Buf16 = Array;
|
|
|
3628 |
exports.Buf32 = Array;
|
|
|
3629 |
exports.assign(exports, fnUntyped);
|
|
|
3630 |
}
|
|
|
3631 |
};
|
|
|
3632 |
|
|
|
3633 |
exports.setTyped(TYPED_OK);
|
|
|
3634 |
},{}],28:[function(_dereq_,module,exports){
|
|
|
3635 |
// String encode/decode helpers
|
|
|
3636 |
'use strict';
|
|
|
3637 |
|
|
|
3638 |
|
|
|
3639 |
var utils = _dereq_('./common');
|
|
|
3640 |
|
|
|
3641 |
|
|
|
3642 |
// Quick check if we can use fast array to bin string conversion
|
|
|
3643 |
//
|
|
|
3644 |
// - apply(Array) can fail on Android 2.2
|
|
|
3645 |
// - apply(Uint8Array) can fail on iOS 5.1 Safary
|
|
|
3646 |
//
|
|
|
3647 |
var STR_APPLY_OK = true;
|
|
|
3648 |
var STR_APPLY_UIA_OK = true;
|
|
|
3649 |
|
|
|
3650 |
try { String.fromCharCode.apply(null, [0]); } catch(__) { STR_APPLY_OK = false; }
|
|
|
3651 |
try { String.fromCharCode.apply(null, new Uint8Array(1)); } catch(__) { STR_APPLY_UIA_OK = false; }
|
|
|
3652 |
|
|
|
3653 |
|
|
|
3654 |
// Table with utf8 lengths (calculated by first byte of sequence)
|
|
|
3655 |
// Note, that 5 & 6-byte values and some 4-byte values can not be represented in JS,
|
|
|
3656 |
// because max possible codepoint is 0x10ffff
|
|
|
3657 |
var _utf8len = new utils.Buf8(256);
|
|
|
3658 |
for (var i=0; i<256; i++) {
|
|
|
3659 |
_utf8len[i] = (i >= 252 ? 6 : i >= 248 ? 5 : i >= 240 ? 4 : i >= 224 ? 3 : i >= 192 ? 2 : 1);
|
|
|
3660 |
}
|
|
|
3661 |
_utf8len[254]=_utf8len[254]=1; // Invalid sequence start
|
|
|
3662 |
|
|
|
3663 |
|
|
|
3664 |
// convert string to array (typed, when possible)
|
|
|
3665 |
exports.string2buf = function (str) {
|
|
|
3666 |
var buf, c, c2, m_pos, i, str_len = str.length, buf_len = 0;
|
|
|
3667 |
|
|
|
3668 |
// count binary size
|
|
|
3669 |
for (m_pos = 0; m_pos < str_len; m_pos++) {
|
|
|
3670 |
c = str.charCodeAt(m_pos);
|
|
|
3671 |
if ((c & 0xfc00) === 0xd800 && (m_pos+1 < str_len)) {
|
|
|
3672 |
c2 = str.charCodeAt(m_pos+1);
|
|
|
3673 |
if ((c2 & 0xfc00) === 0xdc00) {
|
|
|
3674 |
c = 0x10000 + ((c - 0xd800) << 10) + (c2 - 0xdc00);
|
|
|
3675 |
m_pos++;
|
|
|
3676 |
}
|
|
|
3677 |
}
|
|
|
3678 |
buf_len += c < 0x80 ? 1 : c < 0x800 ? 2 : c < 0x10000 ? 3 : 4;
|
|
|
3679 |
}
|
|
|
3680 |
|
|
|
3681 |
// allocate buffer
|
|
|
3682 |
buf = new utils.Buf8(buf_len);
|
|
|
3683 |
|
|
|
3684 |
// convert
|
|
|
3685 |
for (i=0, m_pos = 0; i < buf_len; m_pos++) {
|
|
|
3686 |
c = str.charCodeAt(m_pos);
|
|
|
3687 |
if ((c & 0xfc00) === 0xd800 && (m_pos+1 < str_len)) {
|
|
|
3688 |
c2 = str.charCodeAt(m_pos+1);
|
|
|
3689 |
if ((c2 & 0xfc00) === 0xdc00) {
|
|
|
3690 |
c = 0x10000 + ((c - 0xd800) << 10) + (c2 - 0xdc00);
|
|
|
3691 |
m_pos++;
|
|
|
3692 |
}
|
|
|
3693 |
}
|
|
|
3694 |
if (c < 0x80) {
|
|
|
3695 |
/* one byte */
|
|
|
3696 |
buf[i++] = c;
|
|
|
3697 |
} else if (c < 0x800) {
|
|
|
3698 |
/* two bytes */
|
|
|
3699 |
buf[i++] = 0xC0 | (c >>> 6);
|
|
|
3700 |
buf[i++] = 0x80 | (c & 0x3f);
|
|
|
3701 |
} else if (c < 0x10000) {
|
|
|
3702 |
/* three bytes */
|
|
|
3703 |
buf[i++] = 0xE0 | (c >>> 12);
|
|
|
3704 |
buf[i++] = 0x80 | (c >>> 6 & 0x3f);
|
|
|
3705 |
buf[i++] = 0x80 | (c & 0x3f);
|
|
|
3706 |
} else {
|
|
|
3707 |
/* four bytes */
|
|
|
3708 |
buf[i++] = 0xf0 | (c >>> 18);
|
|
|
3709 |
buf[i++] = 0x80 | (c >>> 12 & 0x3f);
|
|
|
3710 |
buf[i++] = 0x80 | (c >>> 6 & 0x3f);
|
|
|
3711 |
buf[i++] = 0x80 | (c & 0x3f);
|
|
|
3712 |
}
|
|
|
3713 |
}
|
|
|
3714 |
|
|
|
3715 |
return buf;
|
|
|
3716 |
};
|
|
|
3717 |
|
|
|
3718 |
// Helper (used in 2 places)
|
|
|
3719 |
function buf2binstring(buf, len) {
|
|
|
3720 |
// use fallback for big arrays to avoid stack overflow
|
|
|
3721 |
if (len < 65537) {
|
|
|
3722 |
if ((buf.subarray && STR_APPLY_UIA_OK) || (!buf.subarray && STR_APPLY_OK)) {
|
|
|
3723 |
return String.fromCharCode.apply(null, utils.shrinkBuf(buf, len));
|
|
|
3724 |
}
|
|
|
3725 |
}
|
|
|
3726 |
|
|
|
3727 |
var result = '';
|
|
|
3728 |
for(var i=0; i < len; i++) {
|
|
|
3729 |
result += String.fromCharCode(buf[i]);
|
|
|
3730 |
}
|
|
|
3731 |
return result;
|
|
|
3732 |
}
|
|
|
3733 |
|
|
|
3734 |
|
|
|
3735 |
// Convert byte array to binary string
|
|
|
3736 |
exports.buf2binstring = function(buf) {
|
|
|
3737 |
return buf2binstring(buf, buf.length);
|
|
|
3738 |
};
|
|
|
3739 |
|
|
|
3740 |
|
|
|
3741 |
// Convert binary string (typed, when possible)
|
|
|
3742 |
exports.binstring2buf = function(str) {
|
|
|
3743 |
var buf = new utils.Buf8(str.length);
|
|
|
3744 |
for(var i=0, len=buf.length; i < len; i++) {
|
|
|
3745 |
buf[i] = str.charCodeAt(i);
|
|
|
3746 |
}
|
|
|
3747 |
return buf;
|
|
|
3748 |
};
|
|
|
3749 |
|
|
|
3750 |
|
|
|
3751 |
// convert array to string
|
|
|
3752 |
exports.buf2string = function (buf, max) {
|
|
|
3753 |
var i, out, c, c_len;
|
|
|
3754 |
var len = max || buf.length;
|
|
|
3755 |
|
|
|
3756 |
// Reserve max possible length (2 words per char)
|
|
|
3757 |
// NB: by unknown reasons, Array is significantly faster for
|
|
|
3758 |
// String.fromCharCode.apply than Uint16Array.
|
|
|
3759 |
var utf16buf = new Array(len*2);
|
|
|
3760 |
|
|
|
3761 |
for (out=0, i=0; i<len;) {
|
|
|
3762 |
c = buf[i++];
|
|
|
3763 |
// quick process ascii
|
|
|
3764 |
if (c < 0x80) { utf16buf[out++] = c; continue; }
|
|
|
3765 |
|
|
|
3766 |
c_len = _utf8len[c];
|
|
|
3767 |
// skip 5 & 6 byte codes
|
|
|
3768 |
if (c_len > 4) { utf16buf[out++] = 0xfffd; i += c_len-1; continue; }
|
|
|
3769 |
|
|
|
3770 |
// apply mask on first byte
|
|
|
3771 |
c &= c_len === 2 ? 0x1f : c_len === 3 ? 0x0f : 0x07;
|
|
|
3772 |
// join the rest
|
|
|
3773 |
while (c_len > 1 && i < len) {
|
|
|
3774 |
c = (c << 6) | (buf[i++] & 0x3f);
|
|
|
3775 |
c_len--;
|
|
|
3776 |
}
|
|
|
3777 |
|
|
|
3778 |
// terminated by end of string?
|
|
|
3779 |
if (c_len > 1) { utf16buf[out++] = 0xfffd; continue; }
|
|
|
3780 |
|
|
|
3781 |
if (c < 0x10000) {
|
|
|
3782 |
utf16buf[out++] = c;
|
|
|
3783 |
} else {
|
|
|
3784 |
c -= 0x10000;
|
|
|
3785 |
utf16buf[out++] = 0xd800 | ((c >> 10) & 0x3ff);
|
|
|
3786 |
utf16buf[out++] = 0xdc00 | (c & 0x3ff);
|
|
|
3787 |
}
|
|
|
3788 |
}
|
|
|
3789 |
|
|
|
3790 |
return buf2binstring(utf16buf, out);
|
|
|
3791 |
};
|
|
|
3792 |
|
|
|
3793 |
|
|
|
3794 |
// Calculate max possible position in utf8 buffer,
|
|
|
3795 |
// that will not break sequence. If that's not possible
|
|
|
3796 |
// - (very small limits) return max size as is.
|
|
|
3797 |
//
|
|
|
3798 |
// buf[] - utf8 bytes array
|
|
|
3799 |
// max - length limit (mandatory);
|
|
|
3800 |
exports.utf8border = function(buf, max) {
|
|
|
3801 |
var pos;
|
|
|
3802 |
|
|
|
3803 |
max = max || buf.length;
|
|
|
3804 |
if (max > buf.length) { max = buf.length; }
|
|
|
3805 |
|
|
|
3806 |
// go back from last position, until start of sequence found
|
|
|
3807 |
pos = max-1;
|
|
|
3808 |
while (pos >= 0 && (buf[pos] & 0xC0) === 0x80) { pos--; }
|
|
|
3809 |
|
|
|
3810 |
// Fuckup - very small and broken sequence,
|
|
|
3811 |
// return max, because we should return something anyway.
|
|
|
3812 |
if (pos < 0) { return max; }
|
|
|
3813 |
|
|
|
3814 |
// If we came to start of buffer - that means vuffer is too small,
|
|
|
3815 |
// return max too.
|
|
|
3816 |
if (pos === 0) { return max; }
|
|
|
3817 |
|
|
|
3818 |
return (pos + _utf8len[buf[pos]] > max) ? pos : max;
|
|
|
3819 |
};
|
|
|
3820 |
|
|
|
3821 |
},{"./common":27}],29:[function(_dereq_,module,exports){
|
|
|
3822 |
'use strict';
|
|
|
3823 |
|
|
|
3824 |
// Note: adler32 takes 12% for level 0 and 2% for level 6.
|
|
|
3825 |
// It doesn't worth to make additional optimizationa as in original.
|
|
|
3826 |
// Small size is preferable.
|
|
|
3827 |
|
|
|
3828 |
function adler32(adler, buf, len, pos) {
|
|
|
3829 |
var s1 = (adler & 0xffff) |0
|
|
|
3830 |
, s2 = ((adler >>> 16) & 0xffff) |0
|
|
|
3831 |
, n = 0;
|
|
|
3832 |
|
|
|
3833 |
while (len !== 0) {
|
|
|
3834 |
// Set limit ~ twice less than 5552, to keep
|
|
|
3835 |
// s2 in 31-bits, because we force signed ints.
|
|
|
3836 |
// in other case %= will fail.
|
|
|
3837 |
n = len > 2000 ? 2000 : len;
|
|
|
3838 |
len -= n;
|
|
|
3839 |
|
|
|
3840 |
do {
|
|
|
3841 |
s1 = (s1 + buf[pos++]) |0;
|
|
|
3842 |
s2 = (s2 + s1) |0;
|
|
|
3843 |
} while (--n);
|
|
|
3844 |
|
|
|
3845 |
s1 %= 65521;
|
|
|
3846 |
s2 %= 65521;
|
|
|
3847 |
}
|
|
|
3848 |
|
|
|
3849 |
return (s1 | (s2 << 16)) |0;
|
|
|
3850 |
}
|
|
|
3851 |
|
|
|
3852 |
|
|
|
3853 |
module.exports = adler32;
|
|
|
3854 |
},{}],30:[function(_dereq_,module,exports){
|
|
|
3855 |
module.exports = {
|
|
|
3856 |
|
|
|
3857 |
/* Allowed flush values; see deflate() and inflate() below for details */
|
|
|
3858 |
Z_NO_FLUSH: 0,
|
|
|
3859 |
Z_PARTIAL_FLUSH: 1,
|
|
|
3860 |
Z_SYNC_FLUSH: 2,
|
|
|
3861 |
Z_FULL_FLUSH: 3,
|
|
|
3862 |
Z_FINISH: 4,
|
|
|
3863 |
Z_BLOCK: 5,
|
|
|
3864 |
Z_TREES: 6,
|
|
|
3865 |
|
|
|
3866 |
/* Return codes for the compression/decompression functions. Negative values
|
|
|
3867 |
* are errors, positive values are used for special but normal events.
|
|
|
3868 |
*/
|
|
|
3869 |
Z_OK: 0,
|
|
|
3870 |
Z_STREAM_END: 1,
|
|
|
3871 |
Z_NEED_DICT: 2,
|
|
|
3872 |
Z_ERRNO: -1,
|
|
|
3873 |
Z_STREAM_ERROR: -2,
|
|
|
3874 |
Z_DATA_ERROR: -3,
|
|
|
3875 |
//Z_MEM_ERROR: -4,
|
|
|
3876 |
Z_BUF_ERROR: -5,
|
|
|
3877 |
//Z_VERSION_ERROR: -6,
|
|
|
3878 |
|
|
|
3879 |
/* compression levels */
|
|
|
3880 |
Z_NO_COMPRESSION: 0,
|
|
|
3881 |
Z_BEST_SPEED: 1,
|
|
|
3882 |
Z_BEST_COMPRESSION: 9,
|
|
|
3883 |
Z_DEFAULT_COMPRESSION: -1,
|
|
|
3884 |
|
|
|
3885 |
|
|
|
3886 |
Z_FILTERED: 1,
|
|
|
3887 |
Z_HUFFMAN_ONLY: 2,
|
|
|
3888 |
Z_RLE: 3,
|
|
|
3889 |
Z_FIXED: 4,
|
|
|
3890 |
Z_DEFAULT_STRATEGY: 0,
|
|
|
3891 |
|
|
|
3892 |
/* Possible values of the data_type field (though see inflate()) */
|
|
|
3893 |
Z_BINARY: 0,
|
|
|
3894 |
Z_TEXT: 1,
|
|
|
3895 |
//Z_ASCII: 1, // = Z_TEXT (deprecated)
|
|
|
3896 |
Z_UNKNOWN: 2,
|
|
|
3897 |
|
|
|
3898 |
/* The deflate compression method */
|
|
|
3899 |
Z_DEFLATED: 8
|
|
|
3900 |
//Z_NULL: null // Use -1 or null inline, depending on var type
|
|
|
3901 |
};
|
|
|
3902 |
},{}],31:[function(_dereq_,module,exports){
|
|
|
3903 |
'use strict';
|
|
|
3904 |
|
|
|
3905 |
// Note: we can't get significant speed boost here.
|
|
|
3906 |
// So write code to minimize size - no pregenerated tables
|
|
|
3907 |
// and array tools dependencies.
|
|
|
3908 |
|
|
|
3909 |
|
|
|
3910 |
// Use ordinary array, since untyped makes no boost here
|
|
|
3911 |
function makeTable() {
|
|
|
3912 |
var c, table = [];
|
|
|
3913 |
|
|
|
3914 |
for(var n =0; n < 256; n++){
|
|
|
3915 |
c = n;
|
|
|
3916 |
for(var k =0; k < 8; k++){
|
|
|
3917 |
c = ((c&1) ? (0xEDB88320 ^ (c >>> 1)) : (c >>> 1));
|
|
|
3918 |
}
|
|
|
3919 |
table[n] = c;
|
|
|
3920 |
}
|
|
|
3921 |
|
|
|
3922 |
return table;
|
|
|
3923 |
}
|
|
|
3924 |
|
|
|
3925 |
// Create table on load. Just 255 signed longs. Not a problem.
|
|
|
3926 |
var crcTable = makeTable();
|
|
|
3927 |
|
|
|
3928 |
|
|
|
3929 |
function crc32(crc, buf, len, pos) {
|
|
|
3930 |
var t = crcTable
|
|
|
3931 |
, end = pos + len;
|
|
|
3932 |
|
|
|
3933 |
crc = crc ^ (-1);
|
|
|
3934 |
|
|
|
3935 |
for (var i = pos; i < end; i++ ) {
|
|
|
3936 |
crc = (crc >>> 8) ^ t[(crc ^ buf[i]) & 0xFF];
|
|
|
3937 |
}
|
|
|
3938 |
|
|
|
3939 |
return (crc ^ (-1)); // >>> 0;
|
|
|
3940 |
}
|
|
|
3941 |
|
|
|
3942 |
|
|
|
3943 |
module.exports = crc32;
|
|
|
3944 |
},{}],32:[function(_dereq_,module,exports){
|
|
|
3945 |
'use strict';
|
|
|
3946 |
|
|
|
3947 |
var utils = _dereq_('../utils/common');
|
|
|
3948 |
var trees = _dereq_('./trees');
|
|
|
3949 |
var adler32 = _dereq_('./adler32');
|
|
|
3950 |
var crc32 = _dereq_('./crc32');
|
|
|
3951 |
var msg = _dereq_('./messages');
|
|
|
3952 |
|
|
|
3953 |
/* Public constants ==========================================================*/
|
|
|
3954 |
/* ===========================================================================*/
|
|
|
3955 |
|
|
|
3956 |
|
|
|
3957 |
/* Allowed flush values; see deflate() and inflate() below for details */
|
|
|
3958 |
var Z_NO_FLUSH = 0;
|
|
|
3959 |
var Z_PARTIAL_FLUSH = 1;
|
|
|
3960 |
//var Z_SYNC_FLUSH = 2;
|
|
|
3961 |
var Z_FULL_FLUSH = 3;
|
|
|
3962 |
var Z_FINISH = 4;
|
|
|
3963 |
var Z_BLOCK = 5;
|
|
|
3964 |
//var Z_TREES = 6;
|
|
|
3965 |
|
|
|
3966 |
|
|
|
3967 |
/* Return codes for the compression/decompression functions. Negative values
|
|
|
3968 |
* are errors, positive values are used for special but normal events.
|
|
|
3969 |
*/
|
|
|
3970 |
var Z_OK = 0;
|
|
|
3971 |
var Z_STREAM_END = 1;
|
|
|
3972 |
//var Z_NEED_DICT = 2;
|
|
|
3973 |
//var Z_ERRNO = -1;
|
|
|
3974 |
var Z_STREAM_ERROR = -2;
|
|
|
3975 |
var Z_DATA_ERROR = -3;
|
|
|
3976 |
//var Z_MEM_ERROR = -4;
|
|
|
3977 |
var Z_BUF_ERROR = -5;
|
|
|
3978 |
//var Z_VERSION_ERROR = -6;
|
|
|
3979 |
|
|
|
3980 |
|
|
|
3981 |
/* compression levels */
|
|
|
3982 |
//var Z_NO_COMPRESSION = 0;
|
|
|
3983 |
//var Z_BEST_SPEED = 1;
|
|
|
3984 |
//var Z_BEST_COMPRESSION = 9;
|
|
|
3985 |
var Z_DEFAULT_COMPRESSION = -1;
|
|
|
3986 |
|
|
|
3987 |
|
|
|
3988 |
var Z_FILTERED = 1;
|
|
|
3989 |
var Z_HUFFMAN_ONLY = 2;
|
|
|
3990 |
var Z_RLE = 3;
|
|
|
3991 |
var Z_FIXED = 4;
|
|
|
3992 |
var Z_DEFAULT_STRATEGY = 0;
|
|
|
3993 |
|
|
|
3994 |
/* Possible values of the data_type field (though see inflate()) */
|
|
|
3995 |
//var Z_BINARY = 0;
|
|
|
3996 |
//var Z_TEXT = 1;
|
|
|
3997 |
//var Z_ASCII = 1; // = Z_TEXT
|
|
|
3998 |
var Z_UNKNOWN = 2;
|
|
|
3999 |
|
|
|
4000 |
|
|
|
4001 |
/* The deflate compression method */
|
|
|
4002 |
var Z_DEFLATED = 8;
|
|
|
4003 |
|
|
|
4004 |
/*============================================================================*/
|
|
|
4005 |
|
|
|
4006 |
|
|
|
4007 |
var MAX_MEM_LEVEL = 9;
|
|
|
4008 |
/* Maximum value for memLevel in deflateInit2 */
|
|
|
4009 |
var MAX_WBITS = 15;
|
|
|
4010 |
/* 32K LZ77 window */
|
|
|
4011 |
var DEF_MEM_LEVEL = 8;
|
|
|
4012 |
|
|
|
4013 |
|
|
|
4014 |
var LENGTH_CODES = 29;
|
|
|
4015 |
/* number of length codes, not counting the special END_BLOCK code */
|
|
|
4016 |
var LITERALS = 256;
|
|
|
4017 |
/* number of literal bytes 0..255 */
|
|
|
4018 |
var L_CODES = LITERALS + 1 + LENGTH_CODES;
|
|
|
4019 |
/* number of Literal or Length codes, including the END_BLOCK code */
|
|
|
4020 |
var D_CODES = 30;
|
|
|
4021 |
/* number of distance codes */
|
|
|
4022 |
var BL_CODES = 19;
|
|
|
4023 |
/* number of codes used to transfer the bit lengths */
|
|
|
4024 |
var HEAP_SIZE = 2*L_CODES + 1;
|
|
|
4025 |
/* maximum heap size */
|
|
|
4026 |
var MAX_BITS = 15;
|
|
|
4027 |
/* All codes must not exceed MAX_BITS bits */
|
|
|
4028 |
|
|
|
4029 |
var MIN_MATCH = 3;
|
|
|
4030 |
var MAX_MATCH = 258;
|
|
|
4031 |
var MIN_LOOKAHEAD = (MAX_MATCH + MIN_MATCH + 1);
|
|
|
4032 |
|
|
|
4033 |
var PRESET_DICT = 0x20;
|
|
|
4034 |
|
|
|
4035 |
var INIT_STATE = 42;
|
|
|
4036 |
var EXTRA_STATE = 69;
|
|
|
4037 |
var NAME_STATE = 73;
|
|
|
4038 |
var COMMENT_STATE = 91;
|
|
|
4039 |
var HCRC_STATE = 103;
|
|
|
4040 |
var BUSY_STATE = 113;
|
|
|
4041 |
var FINISH_STATE = 666;
|
|
|
4042 |
|
|
|
4043 |
var BS_NEED_MORE = 1; /* block not completed, need more input or more output */
|
|
|
4044 |
var BS_BLOCK_DONE = 2; /* block flush performed */
|
|
|
4045 |
var BS_FINISH_STARTED = 3; /* finish started, need only more output at next deflate */
|
|
|
4046 |
var BS_FINISH_DONE = 4; /* finish done, accept no more input or output */
|
|
|
4047 |
|
|
|
4048 |
var OS_CODE = 0x03; // Unix :) . Don't detect, use this default.
|
|
|
4049 |
|
|
|
4050 |
function err(strm, errorCode) {
|
|
|
4051 |
strm.msg = msg[errorCode];
|
|
|
4052 |
return errorCode;
|
|
|
4053 |
}
|
|
|
4054 |
|
|
|
4055 |
function rank(f) {
|
|
|
4056 |
return ((f) << 1) - ((f) > 4 ? 9 : 0);
|
|
|
4057 |
}
|
|
|
4058 |
|
|
|
4059 |
function zero(buf) { var len = buf.length; while (--len >= 0) { buf[len] = 0; } }
|
|
|
4060 |
|
|
|
4061 |
|
|
|
4062 |
/* =========================================================================
|
|
|
4063 |
* Flush as much pending output as possible. All deflate() output goes
|
|
|
4064 |
* through this function so some applications may wish to modify it
|
|
|
4065 |
* to avoid allocating a large strm->output buffer and copying into it.
|
|
|
4066 |
* (See also read_buf()).
|
|
|
4067 |
*/
|
|
|
4068 |
function flush_pending(strm) {
|
|
|
4069 |
var s = strm.state;
|
|
|
4070 |
|
|
|
4071 |
//_tr_flush_bits(s);
|
|
|
4072 |
var len = s.pending;
|
|
|
4073 |
if (len > strm.avail_out) {
|
|
|
4074 |
len = strm.avail_out;
|
|
|
4075 |
}
|
|
|
4076 |
if (len === 0) { return; }
|
|
|
4077 |
|
|
|
4078 |
utils.arraySet(strm.output, s.pending_buf, s.pending_out, len, strm.next_out);
|
|
|
4079 |
strm.next_out += len;
|
|
|
4080 |
s.pending_out += len;
|
|
|
4081 |
strm.total_out += len;
|
|
|
4082 |
strm.avail_out -= len;
|
|
|
4083 |
s.pending -= len;
|
|
|
4084 |
if (s.pending === 0) {
|
|
|
4085 |
s.pending_out = 0;
|
|
|
4086 |
}
|
|
|
4087 |
}
|
|
|
4088 |
|
|
|
4089 |
|
|
|
4090 |
function flush_block_only (s, last) {
|
|
|
4091 |
trees._tr_flush_block(s, (s.block_start >= 0 ? s.block_start : -1), s.strstart - s.block_start, last);
|
|
|
4092 |
s.block_start = s.strstart;
|
|
|
4093 |
flush_pending(s.strm);
|
|
|
4094 |
}
|
|
|
4095 |
|
|
|
4096 |
|
|
|
4097 |
function put_byte(s, b) {
|
|
|
4098 |
s.pending_buf[s.pending++] = b;
|
|
|
4099 |
}
|
|
|
4100 |
|
|
|
4101 |
|
|
|
4102 |
/* =========================================================================
|
|
|
4103 |
* Put a short in the pending buffer. The 16-bit value is put in MSB order.
|
|
|
4104 |
* IN assertion: the stream state is correct and there is enough room in
|
|
|
4105 |
* pending_buf.
|
|
|
4106 |
*/
|
|
|
4107 |
function putShortMSB(s, b) {
|
|
|
4108 |
// put_byte(s, (Byte)(b >> 8));
|
|
|
4109 |
// put_byte(s, (Byte)(b & 0xff));
|
|
|
4110 |
s.pending_buf[s.pending++] = (b >>> 8) & 0xff;
|
|
|
4111 |
s.pending_buf[s.pending++] = b & 0xff;
|
|
|
4112 |
}
|
|
|
4113 |
|
|
|
4114 |
|
|
|
4115 |
/* ===========================================================================
|
|
|
4116 |
* Read a new buffer from the current input stream, update the adler32
|
|
|
4117 |
* and total number of bytes read. All deflate() input goes through
|
|
|
4118 |
* this function so some applications may wish to modify it to avoid
|
|
|
4119 |
* allocating a large strm->input buffer and copying from it.
|
|
|
4120 |
* (See also flush_pending()).
|
|
|
4121 |
*/
|
|
|
4122 |
function read_buf(strm, buf, start, size) {
|
|
|
4123 |
var len = strm.avail_in;
|
|
|
4124 |
|
|
|
4125 |
if (len > size) { len = size; }
|
|
|
4126 |
if (len === 0) { return 0; }
|
|
|
4127 |
|
|
|
4128 |
strm.avail_in -= len;
|
|
|
4129 |
|
|
|
4130 |
utils.arraySet(buf, strm.input, strm.next_in, len, start);
|
|
|
4131 |
if (strm.state.wrap === 1) {
|
|
|
4132 |
strm.adler = adler32(strm.adler, buf, len, start);
|
|
|
4133 |
}
|
|
|
4134 |
|
|
|
4135 |
else if (strm.state.wrap === 2) {
|
|
|
4136 |
strm.adler = crc32(strm.adler, buf, len, start);
|
|
|
4137 |
}
|
|
|
4138 |
|
|
|
4139 |
strm.next_in += len;
|
|
|
4140 |
strm.total_in += len;
|
|
|
4141 |
|
|
|
4142 |
return len;
|
|
|
4143 |
}
|
|
|
4144 |
|
|
|
4145 |
|
|
|
4146 |
/* ===========================================================================
|
|
|
4147 |
* Set match_start to the longest match starting at the given string and
|
|
|
4148 |
* return its length. Matches shorter or equal to prev_length are discarded,
|
|
|
4149 |
* in which case the result is equal to prev_length and match_start is
|
|
|
4150 |
* garbage.
|
|
|
4151 |
* IN assertions: cur_match is the head of the hash chain for the current
|
|
|
4152 |
* string (strstart) and its distance is <= MAX_DIST, and prev_length >= 1
|
|
|
4153 |
* OUT assertion: the match length is not greater than s->lookahead.
|
|
|
4154 |
*/
|
|
|
4155 |
function longest_match(s, cur_match) {
|
|
|
4156 |
var chain_length = s.max_chain_length; /* max hash chain length */
|
|
|
4157 |
var scan = s.strstart; /* current string */
|
|
|
4158 |
var match; /* matched string */
|
|
|
4159 |
var len; /* length of current match */
|
|
|
4160 |
var best_len = s.prev_length; /* best match length so far */
|
|
|
4161 |
var nice_match = s.nice_match; /* stop if match long enough */
|
|
|
4162 |
var limit = (s.strstart > (s.w_size - MIN_LOOKAHEAD)) ?
|
|
|
4163 |
s.strstart - (s.w_size - MIN_LOOKAHEAD) : 0/*NIL*/;
|
|
|
4164 |
|
|
|
4165 |
var _win = s.window; // shortcut
|
|
|
4166 |
|
|
|
4167 |
var wmask = s.w_mask;
|
|
|
4168 |
var prev = s.prev;
|
|
|
4169 |
|
|
|
4170 |
/* Stop when cur_match becomes <= limit. To simplify the code,
|
|
|
4171 |
* we prevent matches with the string of window index 0.
|
|
|
4172 |
*/
|
|
|
4173 |
|
|
|
4174 |
var strend = s.strstart + MAX_MATCH;
|
|
|
4175 |
var scan_end1 = _win[scan + best_len - 1];
|
|
|
4176 |
var scan_end = _win[scan + best_len];
|
|
|
4177 |
|
|
|
4178 |
/* The code is optimized for HASH_BITS >= 8 and MAX_MATCH-2 multiple of 16.
|
|
|
4179 |
* It is easy to get rid of this optimization if necessary.
|
|
|
4180 |
*/
|
|
|
4181 |
// Assert(s->hash_bits >= 8 && MAX_MATCH == 258, "Code too clever");
|
|
|
4182 |
|
|
|
4183 |
/* Do not waste too much time if we already have a good match: */
|
|
|
4184 |
if (s.prev_length >= s.good_match) {
|
|
|
4185 |
chain_length >>= 2;
|
|
|
4186 |
}
|
|
|
4187 |
/* Do not look for matches beyond the end of the input. This is necessary
|
|
|
4188 |
* to make deflate deterministic.
|
|
|
4189 |
*/
|
|
|
4190 |
if (nice_match > s.lookahead) { nice_match = s.lookahead; }
|
|
|
4191 |
|
|
|
4192 |
// Assert((ulg)s->strstart <= s->window_size-MIN_LOOKAHEAD, "need lookahead");
|
|
|
4193 |
|
|
|
4194 |
do {
|
|
|
4195 |
// Assert(cur_match < s->strstart, "no future");
|
|
|
4196 |
match = cur_match;
|
|
|
4197 |
|
|
|
4198 |
/* Skip to next match if the match length cannot increase
|
|
|
4199 |
* or if the match length is less than 2. Note that the checks below
|
|
|
4200 |
* for insufficient lookahead only occur occasionally for performance
|
|
|
4201 |
* reasons. Therefore uninitialized memory will be accessed, and
|
|
|
4202 |
* conditional jumps will be made that depend on those values.
|
|
|
4203 |
* However the length of the match is limited to the lookahead, so
|
|
|
4204 |
* the output of deflate is not affected by the uninitialized values.
|
|
|
4205 |
*/
|
|
|
4206 |
|
|
|
4207 |
if (_win[match + best_len] !== scan_end ||
|
|
|
4208 |
_win[match + best_len - 1] !== scan_end1 ||
|
|
|
4209 |
_win[match] !== _win[scan] ||
|
|
|
4210 |
_win[++match] !== _win[scan + 1]) {
|
|
|
4211 |
continue;
|
|
|
4212 |
}
|
|
|
4213 |
|
|
|
4214 |
/* The check at best_len-1 can be removed because it will be made
|
|
|
4215 |
* again later. (This heuristic is not always a win.)
|
|
|
4216 |
* It is not necessary to compare scan[2] and match[2] since they
|
|
|
4217 |
* are always equal when the other bytes match, given that
|
|
|
4218 |
* the hash keys are equal and that HASH_BITS >= 8.
|
|
|
4219 |
*/
|
|
|
4220 |
scan += 2;
|
|
|
4221 |
match++;
|
|
|
4222 |
// Assert(*scan == *match, "match[2]?");
|
|
|
4223 |
|
|
|
4224 |
/* We check for insufficient lookahead only every 8th comparison;
|
|
|
4225 |
* the 256th check will be made at strstart+258.
|
|
|
4226 |
*/
|
|
|
4227 |
do {
|
|
|
4228 |
/*jshint noempty:false*/
|
|
|
4229 |
} while (_win[++scan] === _win[++match] && _win[++scan] === _win[++match] &&
|
|
|
4230 |
_win[++scan] === _win[++match] && _win[++scan] === _win[++match] &&
|
|
|
4231 |
_win[++scan] === _win[++match] && _win[++scan] === _win[++match] &&
|
|
|
4232 |
_win[++scan] === _win[++match] && _win[++scan] === _win[++match] &&
|
|
|
4233 |
scan < strend);
|
|
|
4234 |
|
|
|
4235 |
// Assert(scan <= s->window+(unsigned)(s->window_size-1), "wild scan");
|
|
|
4236 |
|
|
|
4237 |
len = MAX_MATCH - (strend - scan);
|
|
|
4238 |
scan = strend - MAX_MATCH;
|
|
|
4239 |
|
|
|
4240 |
if (len > best_len) {
|
|
|
4241 |
s.match_start = cur_match;
|
|
|
4242 |
best_len = len;
|
|
|
4243 |
if (len >= nice_match) {
|
|
|
4244 |
break;
|
|
|
4245 |
}
|
|
|
4246 |
scan_end1 = _win[scan + best_len - 1];
|
|
|
4247 |
scan_end = _win[scan + best_len];
|
|
|
4248 |
}
|
|
|
4249 |
} while ((cur_match = prev[cur_match & wmask]) > limit && --chain_length !== 0);
|
|
|
4250 |
|
|
|
4251 |
if (best_len <= s.lookahead) {
|
|
|
4252 |
return best_len;
|
|
|
4253 |
}
|
|
|
4254 |
return s.lookahead;
|
|
|
4255 |
}
|
|
|
4256 |
|
|
|
4257 |
|
|
|
4258 |
/* ===========================================================================
|
|
|
4259 |
* Fill the window when the lookahead becomes insufficient.
|
|
|
4260 |
* Updates strstart and lookahead.
|
|
|
4261 |
*
|
|
|
4262 |
* IN assertion: lookahead < MIN_LOOKAHEAD
|
|
|
4263 |
* OUT assertions: strstart <= window_size-MIN_LOOKAHEAD
|
|
|
4264 |
* At least one byte has been read, or avail_in == 0; reads are
|
|
|
4265 |
* performed for at least two bytes (required for the zip translate_eol
|
|
|
4266 |
* option -- not supported here).
|
|
|
4267 |
*/
|
|
|
4268 |
function fill_window(s) {
|
|
|
4269 |
var _w_size = s.w_size;
|
|
|
4270 |
var p, n, m, more, str;
|
|
|
4271 |
|
|
|
4272 |
//Assert(s->lookahead < MIN_LOOKAHEAD, "already enough lookahead");
|
|
|
4273 |
|
|
|
4274 |
do {
|
|
|
4275 |
more = s.window_size - s.lookahead - s.strstart;
|
|
|
4276 |
|
|
|
4277 |
// JS ints have 32 bit, block below not needed
|
|
|
4278 |
/* Deal with !@#$% 64K limit: */
|
|
|
4279 |
//if (sizeof(int) <= 2) {
|
|
|
4280 |
// if (more == 0 && s->strstart == 0 && s->lookahead == 0) {
|
|
|
4281 |
// more = wsize;
|
|
|
4282 |
//
|
|
|
4283 |
// } else if (more == (unsigned)(-1)) {
|
|
|
4284 |
// /* Very unlikely, but possible on 16 bit machine if
|
|
|
4285 |
// * strstart == 0 && lookahead == 1 (input done a byte at time)
|
|
|
4286 |
// */
|
|
|
4287 |
// more--;
|
|
|
4288 |
// }
|
|
|
4289 |
//}
|
|
|
4290 |
|
|
|
4291 |
|
|
|
4292 |
/* If the window is almost full and there is insufficient lookahead,
|
|
|
4293 |
* move the upper half to the lower one to make room in the upper half.
|
|
|
4294 |
*/
|
|
|
4295 |
if (s.strstart >= _w_size + (_w_size - MIN_LOOKAHEAD)) {
|
|
|
4296 |
|
|
|
4297 |
utils.arraySet(s.window, s.window, _w_size, _w_size, 0);
|
|
|
4298 |
s.match_start -= _w_size;
|
|
|
4299 |
s.strstart -= _w_size;
|
|
|
4300 |
/* we now have strstart >= MAX_DIST */
|
|
|
4301 |
s.block_start -= _w_size;
|
|
|
4302 |
|
|
|
4303 |
/* Slide the hash table (could be avoided with 32 bit values
|
|
|
4304 |
at the expense of memory usage). We slide even when level == 0
|
|
|
4305 |
to keep the hash table consistent if we switch back to level > 0
|
|
|
4306 |
later. (Using level 0 permanently is not an optimal usage of
|
|
|
4307 |
zlib, so we don't care about this pathological case.)
|
|
|
4308 |
*/
|
|
|
4309 |
|
|
|
4310 |
n = s.hash_size;
|
|
|
4311 |
p = n;
|
|
|
4312 |
do {
|
|
|
4313 |
m = s.head[--p];
|
|
|
4314 |
s.head[p] = (m >= _w_size ? m - _w_size : 0);
|
|
|
4315 |
} while (--n);
|
|
|
4316 |
|
|
|
4317 |
n = _w_size;
|
|
|
4318 |
p = n;
|
|
|
4319 |
do {
|
|
|
4320 |
m = s.prev[--p];
|
|
|
4321 |
s.prev[p] = (m >= _w_size ? m - _w_size : 0);
|
|
|
4322 |
/* If n is not on any hash chain, prev[n] is garbage but
|
|
|
4323 |
* its value will never be used.
|
|
|
4324 |
*/
|
|
|
4325 |
} while (--n);
|
|
|
4326 |
|
|
|
4327 |
more += _w_size;
|
|
|
4328 |
}
|
|
|
4329 |
if (s.strm.avail_in === 0) {
|
|
|
4330 |
break;
|
|
|
4331 |
}
|
|
|
4332 |
|
|
|
4333 |
/* If there was no sliding:
|
|
|
4334 |
* strstart <= WSIZE+MAX_DIST-1 && lookahead <= MIN_LOOKAHEAD - 1 &&
|
|
|
4335 |
* more == window_size - lookahead - strstart
|
|
|
4336 |
* => more >= window_size - (MIN_LOOKAHEAD-1 + WSIZE + MAX_DIST-1)
|
|
|
4337 |
* => more >= window_size - 2*WSIZE + 2
|
|
|
4338 |
* In the BIG_MEM or MMAP case (not yet supported),
|
|
|
4339 |
* window_size == input_size + MIN_LOOKAHEAD &&
|
|
|
4340 |
* strstart + s->lookahead <= input_size => more >= MIN_LOOKAHEAD.
|
|
|
4341 |
* Otherwise, window_size == 2*WSIZE so more >= 2.
|
|
|
4342 |
* If there was sliding, more >= WSIZE. So in all cases, more >= 2.
|
|
|
4343 |
*/
|
|
|
4344 |
//Assert(more >= 2, "more < 2");
|
|
|
4345 |
n = read_buf(s.strm, s.window, s.strstart + s.lookahead, more);
|
|
|
4346 |
s.lookahead += n;
|
|
|
4347 |
|
|
|
4348 |
/* Initialize the hash value now that we have some input: */
|
|
|
4349 |
if (s.lookahead + s.insert >= MIN_MATCH) {
|
|
|
4350 |
str = s.strstart - s.insert;
|
|
|
4351 |
s.ins_h = s.window[str];
|
|
|
4352 |
|
|
|
4353 |
/* UPDATE_HASH(s, s->ins_h, s->window[str + 1]); */
|
|
|
4354 |
s.ins_h = ((s.ins_h << s.hash_shift) ^ s.window[str + 1]) & s.hash_mask;
|
|
|
4355 |
//#if MIN_MATCH != 3
|
|
|
4356 |
// Call update_hash() MIN_MATCH-3 more times
|
|
|
4357 |
//#endif
|
|
|
4358 |
while (s.insert) {
|
|
|
4359 |
/* UPDATE_HASH(s, s->ins_h, s->window[str + MIN_MATCH-1]); */
|
|
|
4360 |
s.ins_h = ((s.ins_h << s.hash_shift) ^ s.window[str + MIN_MATCH-1]) & s.hash_mask;
|
|
|
4361 |
|
|
|
4362 |
s.prev[str & s.w_mask] = s.head[s.ins_h];
|
|
|
4363 |
s.head[s.ins_h] = str;
|
|
|
4364 |
str++;
|
|
|
4365 |
s.insert--;
|
|
|
4366 |
if (s.lookahead + s.insert < MIN_MATCH) {
|
|
|
4367 |
break;
|
|
|
4368 |
}
|
|
|
4369 |
}
|
|
|
4370 |
}
|
|
|
4371 |
/* If the whole input has less than MIN_MATCH bytes, ins_h is garbage,
|
|
|
4372 |
* but this is not important since only literal bytes will be emitted.
|
|
|
4373 |
*/
|
|
|
4374 |
|
|
|
4375 |
} while (s.lookahead < MIN_LOOKAHEAD && s.strm.avail_in !== 0);
|
|
|
4376 |
|
|
|
4377 |
/* If the WIN_INIT bytes after the end of the current data have never been
|
|
|
4378 |
* written, then zero those bytes in order to avoid memory check reports of
|
|
|
4379 |
* the use of uninitialized (or uninitialised as Julian writes) bytes by
|
|
|
4380 |
* the longest match routines. Update the high water mark for the next
|
|
|
4381 |
* time through here. WIN_INIT is set to MAX_MATCH since the longest match
|
|
|
4382 |
* routines allow scanning to strstart + MAX_MATCH, ignoring lookahead.
|
|
|
4383 |
*/
|
|
|
4384 |
// if (s.high_water < s.window_size) {
|
|
|
4385 |
// var curr = s.strstart + s.lookahead;
|
|
|
4386 |
// var init = 0;
|
|
|
4387 |
//
|
|
|
4388 |
// if (s.high_water < curr) {
|
|
|
4389 |
// /* Previous high water mark below current data -- zero WIN_INIT
|
|
|
4390 |
// * bytes or up to end of window, whichever is less.
|
|
|
4391 |
// */
|
|
|
4392 |
// init = s.window_size - curr;
|
|
|
4393 |
// if (init > WIN_INIT)
|
|
|
4394 |
// init = WIN_INIT;
|
|
|
4395 |
// zmemzero(s->window + curr, (unsigned)init);
|
|
|
4396 |
// s->high_water = curr + init;
|
|
|
4397 |
// }
|
|
|
4398 |
// else if (s->high_water < (ulg)curr + WIN_INIT) {
|
|
|
4399 |
// /* High water mark at or above current data, but below current data
|
|
|
4400 |
// * plus WIN_INIT -- zero out to current data plus WIN_INIT, or up
|
|
|
4401 |
// * to end of window, whichever is less.
|
|
|
4402 |
// */
|
|
|
4403 |
// init = (ulg)curr + WIN_INIT - s->high_water;
|
|
|
4404 |
// if (init > s->window_size - s->high_water)
|
|
|
4405 |
// init = s->window_size - s->high_water;
|
|
|
4406 |
// zmemzero(s->window + s->high_water, (unsigned)init);
|
|
|
4407 |
// s->high_water += init;
|
|
|
4408 |
// }
|
|
|
4409 |
// }
|
|
|
4410 |
//
|
|
|
4411 |
// Assert((ulg)s->strstart <= s->window_size - MIN_LOOKAHEAD,
|
|
|
4412 |
// "not enough room for search");
|
|
|
4413 |
}
|
|
|
4414 |
|
|
|
4415 |
/* ===========================================================================
|
|
|
4416 |
* Copy without compression as much as possible from the input stream, return
|
|
|
4417 |
* the current block state.
|
|
|
4418 |
* This function does not insert new strings in the dictionary since
|
|
|
4419 |
* uncompressible data is probably not useful. This function is used
|
|
|
4420 |
* only for the level=0 compression option.
|
|
|
4421 |
* NOTE: this function should be optimized to avoid extra copying from
|
|
|
4422 |
* window to pending_buf.
|
|
|
4423 |
*/
|
|
|
4424 |
function deflate_stored(s, flush) {
|
|
|
4425 |
/* Stored blocks are limited to 0xffff bytes, pending_buf is limited
|
|
|
4426 |
* to pending_buf_size, and each stored block has a 5 byte header:
|
|
|
4427 |
*/
|
|
|
4428 |
var max_block_size = 0xffff;
|
|
|
4429 |
|
|
|
4430 |
if (max_block_size > s.pending_buf_size - 5) {
|
|
|
4431 |
max_block_size = s.pending_buf_size - 5;
|
|
|
4432 |
}
|
|
|
4433 |
|
|
|
4434 |
/* Copy as much as possible from input to output: */
|
|
|
4435 |
for (;;) {
|
|
|
4436 |
/* Fill the window as much as possible: */
|
|
|
4437 |
if (s.lookahead <= 1) {
|
|
|
4438 |
|
|
|
4439 |
//Assert(s->strstart < s->w_size+MAX_DIST(s) ||
|
|
|
4440 |
// s->block_start >= (long)s->w_size, "slide too late");
|
|
|
4441 |
// if (!(s.strstart < s.w_size + (s.w_size - MIN_LOOKAHEAD) ||
|
|
|
4442 |
// s.block_start >= s.w_size)) {
|
|
|
4443 |
// throw new Error("slide too late");
|
|
|
4444 |
// }
|
|
|
4445 |
|
|
|
4446 |
fill_window(s);
|
|
|
4447 |
if (s.lookahead === 0 && flush === Z_NO_FLUSH) {
|
|
|
4448 |
return BS_NEED_MORE;
|
|
|
4449 |
}
|
|
|
4450 |
|
|
|
4451 |
if (s.lookahead === 0) {
|
|
|
4452 |
break;
|
|
|
4453 |
}
|
|
|
4454 |
/* flush the current block */
|
|
|
4455 |
}
|
|
|
4456 |
//Assert(s->block_start >= 0L, "block gone");
|
|
|
4457 |
// if (s.block_start < 0) throw new Error("block gone");
|
|
|
4458 |
|
|
|
4459 |
s.strstart += s.lookahead;
|
|
|
4460 |
s.lookahead = 0;
|
|
|
4461 |
|
|
|
4462 |
/* Emit a stored block if pending_buf will be full: */
|
|
|
4463 |
var max_start = s.block_start + max_block_size;
|
|
|
4464 |
|
|
|
4465 |
if (s.strstart === 0 || s.strstart >= max_start) {
|
|
|
4466 |
/* strstart == 0 is possible when wraparound on 16-bit machine */
|
|
|
4467 |
s.lookahead = s.strstart - max_start;
|
|
|
4468 |
s.strstart = max_start;
|
|
|
4469 |
/*** FLUSH_BLOCK(s, 0); ***/
|
|
|
4470 |
flush_block_only(s, false);
|
|
|
4471 |
if (s.strm.avail_out === 0) {
|
|
|
4472 |
return BS_NEED_MORE;
|
|
|
4473 |
}
|
|
|
4474 |
/***/
|
|
|
4475 |
|
|
|
4476 |
|
|
|
4477 |
}
|
|
|
4478 |
/* Flush if we may have to slide, otherwise block_start may become
|
|
|
4479 |
* negative and the data will be gone:
|
|
|
4480 |
*/
|
|
|
4481 |
if (s.strstart - s.block_start >= (s.w_size - MIN_LOOKAHEAD)) {
|
|
|
4482 |
/*** FLUSH_BLOCK(s, 0); ***/
|
|
|
4483 |
flush_block_only(s, false);
|
|
|
4484 |
if (s.strm.avail_out === 0) {
|
|
|
4485 |
return BS_NEED_MORE;
|
|
|
4486 |
}
|
|
|
4487 |
/***/
|
|
|
4488 |
}
|
|
|
4489 |
}
|
|
|
4490 |
|
|
|
4491 |
s.insert = 0;
|
|
|
4492 |
|
|
|
4493 |
if (flush === Z_FINISH) {
|
|
|
4494 |
/*** FLUSH_BLOCK(s, 1); ***/
|
|
|
4495 |
flush_block_only(s, true);
|
|
|
4496 |
if (s.strm.avail_out === 0) {
|
|
|
4497 |
return BS_FINISH_STARTED;
|
|
|
4498 |
}
|
|
|
4499 |
/***/
|
|
|
4500 |
return BS_FINISH_DONE;
|
|
|
4501 |
}
|
|
|
4502 |
|
|
|
4503 |
if (s.strstart > s.block_start) {
|
|
|
4504 |
/*** FLUSH_BLOCK(s, 0); ***/
|
|
|
4505 |
flush_block_only(s, false);
|
|
|
4506 |
if (s.strm.avail_out === 0) {
|
|
|
4507 |
return BS_NEED_MORE;
|
|
|
4508 |
}
|
|
|
4509 |
/***/
|
|
|
4510 |
}
|
|
|
4511 |
|
|
|
4512 |
return BS_NEED_MORE;
|
|
|
4513 |
}
|
|
|
4514 |
|
|
|
4515 |
/* ===========================================================================
|
|
|
4516 |
* Compress as much as possible from the input stream, return the current
|
|
|
4517 |
* block state.
|
|
|
4518 |
* This function does not perform lazy evaluation of matches and inserts
|
|
|
4519 |
* new strings in the dictionary only for unmatched strings or for short
|
|
|
4520 |
* matches. It is used only for the fast compression options.
|
|
|
4521 |
*/
|
|
|
4522 |
function deflate_fast(s, flush) {
|
|
|
4523 |
var hash_head; /* head of the hash chain */
|
|
|
4524 |
var bflush; /* set if current block must be flushed */
|
|
|
4525 |
|
|
|
4526 |
for (;;) {
|
|
|
4527 |
/* Make sure that we always have enough lookahead, except
|
|
|
4528 |
* at the end of the input file. We need MAX_MATCH bytes
|
|
|
4529 |
* for the next match, plus MIN_MATCH bytes to insert the
|
|
|
4530 |
* string following the next match.
|
|
|
4531 |
*/
|
|
|
4532 |
if (s.lookahead < MIN_LOOKAHEAD) {
|
|
|
4533 |
fill_window(s);
|
|
|
4534 |
if (s.lookahead < MIN_LOOKAHEAD && flush === Z_NO_FLUSH) {
|
|
|
4535 |
return BS_NEED_MORE;
|
|
|
4536 |
}
|
|
|
4537 |
if (s.lookahead === 0) {
|
|
|
4538 |
break; /* flush the current block */
|
|
|
4539 |
}
|
|
|
4540 |
}
|
|
|
4541 |
|
|
|
4542 |
/* Insert the string window[strstart .. strstart+2] in the
|
|
|
4543 |
* dictionary, and set hash_head to the head of the hash chain:
|
|
|
4544 |
*/
|
|
|
4545 |
hash_head = 0/*NIL*/;
|
|
|
4546 |
if (s.lookahead >= MIN_MATCH) {
|
|
|
4547 |
/*** INSERT_STRING(s, s.strstart, hash_head); ***/
|
|
|
4548 |
s.ins_h = ((s.ins_h << s.hash_shift) ^ s.window[s.strstart + MIN_MATCH - 1]) & s.hash_mask;
|
|
|
4549 |
hash_head = s.prev[s.strstart & s.w_mask] = s.head[s.ins_h];
|
|
|
4550 |
s.head[s.ins_h] = s.strstart;
|
|
|
4551 |
/***/
|
|
|
4552 |
}
|
|
|
4553 |
|
|
|
4554 |
/* Find the longest match, discarding those <= prev_length.
|
|
|
4555 |
* At this point we have always match_length < MIN_MATCH
|
|
|
4556 |
*/
|
|
|
4557 |
if (hash_head !== 0/*NIL*/ && ((s.strstart - hash_head) <= (s.w_size - MIN_LOOKAHEAD))) {
|
|
|
4558 |
/* To simplify the code, we prevent matches with the string
|
|
|
4559 |
* of window index 0 (in particular we have to avoid a match
|
|
|
4560 |
* of the string with itself at the start of the input file).
|
|
|
4561 |
*/
|
|
|
4562 |
s.match_length = longest_match(s, hash_head);
|
|
|
4563 |
/* longest_match() sets match_start */
|
|
|
4564 |
}
|
|
|
4565 |
if (s.match_length >= MIN_MATCH) {
|
|
|
4566 |
// check_match(s, s.strstart, s.match_start, s.match_length); // for debug only
|
|
|
4567 |
|
|
|
4568 |
/*** _tr_tally_dist(s, s.strstart - s.match_start,
|
|
|
4569 |
s.match_length - MIN_MATCH, bflush); ***/
|
|
|
4570 |
bflush = trees._tr_tally(s, s.strstart - s.match_start, s.match_length - MIN_MATCH);
|
|
|
4571 |
|
|
|
4572 |
s.lookahead -= s.match_length;
|
|
|
4573 |
|
|
|
4574 |
/* Insert new strings in the hash table only if the match length
|
|
|
4575 |
* is not too large. This saves time but degrades compression.
|
|
|
4576 |
*/
|
|
|
4577 |
if (s.match_length <= s.max_lazy_match/*max_insert_length*/ && s.lookahead >= MIN_MATCH) {
|
|
|
4578 |
s.match_length--; /* string at strstart already in table */
|
|
|
4579 |
do {
|
|
|
4580 |
s.strstart++;
|
|
|
4581 |
/*** INSERT_STRING(s, s.strstart, hash_head); ***/
|
|
|
4582 |
s.ins_h = ((s.ins_h << s.hash_shift) ^ s.window[s.strstart + MIN_MATCH - 1]) & s.hash_mask;
|
|
|
4583 |
hash_head = s.prev[s.strstart & s.w_mask] = s.head[s.ins_h];
|
|
|
4584 |
s.head[s.ins_h] = s.strstart;
|
|
|
4585 |
/***/
|
|
|
4586 |
/* strstart never exceeds WSIZE-MAX_MATCH, so there are
|
|
|
4587 |
* always MIN_MATCH bytes ahead.
|
|
|
4588 |
*/
|
|
|
4589 |
} while (--s.match_length !== 0);
|
|
|
4590 |
s.strstart++;
|
|
|
4591 |
} else
|
|
|
4592 |
{
|
|
|
4593 |
s.strstart += s.match_length;
|
|
|
4594 |
s.match_length = 0;
|
|
|
4595 |
s.ins_h = s.window[s.strstart];
|
|
|
4596 |
/* UPDATE_HASH(s, s.ins_h, s.window[s.strstart+1]); */
|
|
|
4597 |
s.ins_h = ((s.ins_h << s.hash_shift) ^ s.window[s.strstart + 1]) & s.hash_mask;
|
|
|
4598 |
|
|
|
4599 |
//#if MIN_MATCH != 3
|
|
|
4600 |
// Call UPDATE_HASH() MIN_MATCH-3 more times
|
|
|
4601 |
//#endif
|
|
|
4602 |
/* If lookahead < MIN_MATCH, ins_h is garbage, but it does not
|
|
|
4603 |
* matter since it will be recomputed at next deflate call.
|
|
|
4604 |
*/
|
|
|
4605 |
}
|
|
|
4606 |
} else {
|
|
|
4607 |
/* No match, output a literal byte */
|
|
|
4608 |
//Tracevv((stderr,"%c", s.window[s.strstart]));
|
|
|
4609 |
/*** _tr_tally_lit(s, s.window[s.strstart], bflush); ***/
|
|
|
4610 |
bflush = trees._tr_tally(s, 0, s.window[s.strstart]);
|
|
|
4611 |
|
|
|
4612 |
s.lookahead--;
|
|
|
4613 |
s.strstart++;
|
|
|
4614 |
}
|
|
|
4615 |
if (bflush) {
|
|
|
4616 |
/*** FLUSH_BLOCK(s, 0); ***/
|
|
|
4617 |
flush_block_only(s, false);
|
|
|
4618 |
if (s.strm.avail_out === 0) {
|
|
|
4619 |
return BS_NEED_MORE;
|
|
|
4620 |
}
|
|
|
4621 |
/***/
|
|
|
4622 |
}
|
|
|
4623 |
}
|
|
|
4624 |
s.insert = ((s.strstart < (MIN_MATCH-1)) ? s.strstart : MIN_MATCH-1);
|
|
|
4625 |
if (flush === Z_FINISH) {
|
|
|
4626 |
/*** FLUSH_BLOCK(s, 1); ***/
|
|
|
4627 |
flush_block_only(s, true);
|
|
|
4628 |
if (s.strm.avail_out === 0) {
|
|
|
4629 |
return BS_FINISH_STARTED;
|
|
|
4630 |
}
|
|
|
4631 |
/***/
|
|
|
4632 |
return BS_FINISH_DONE;
|
|
|
4633 |
}
|
|
|
4634 |
if (s.last_lit) {
|
|
|
4635 |
/*** FLUSH_BLOCK(s, 0); ***/
|
|
|
4636 |
flush_block_only(s, false);
|
|
|
4637 |
if (s.strm.avail_out === 0) {
|
|
|
4638 |
return BS_NEED_MORE;
|
|
|
4639 |
}
|
|
|
4640 |
/***/
|
|
|
4641 |
}
|
|
|
4642 |
return BS_BLOCK_DONE;
|
|
|
4643 |
}
|
|
|
4644 |
|
|
|
4645 |
/* ===========================================================================
|
|
|
4646 |
* Same as above, but achieves better compression. We use a lazy
|
|
|
4647 |
* evaluation for matches: a match is finally adopted only if there is
|
|
|
4648 |
* no better match at the next window position.
|
|
|
4649 |
*/
|
|
|
4650 |
function deflate_slow(s, flush) {
|
|
|
4651 |
var hash_head; /* head of hash chain */
|
|
|
4652 |
var bflush; /* set if current block must be flushed */
|
|
|
4653 |
|
|
|
4654 |
var max_insert;
|
|
|
4655 |
|
|
|
4656 |
/* Process the input block. */
|
|
|
4657 |
for (;;) {
|
|
|
4658 |
/* Make sure that we always have enough lookahead, except
|
|
|
4659 |
* at the end of the input file. We need MAX_MATCH bytes
|
|
|
4660 |
* for the next match, plus MIN_MATCH bytes to insert the
|
|
|
4661 |
* string following the next match.
|
|
|
4662 |
*/
|
|
|
4663 |
if (s.lookahead < MIN_LOOKAHEAD) {
|
|
|
4664 |
fill_window(s);
|
|
|
4665 |
if (s.lookahead < MIN_LOOKAHEAD && flush === Z_NO_FLUSH) {
|
|
|
4666 |
return BS_NEED_MORE;
|
|
|
4667 |
}
|
|
|
4668 |
if (s.lookahead === 0) { break; } /* flush the current block */
|
|
|
4669 |
}
|
|
|
4670 |
|
|
|
4671 |
/* Insert the string window[strstart .. strstart+2] in the
|
|
|
4672 |
* dictionary, and set hash_head to the head of the hash chain:
|
|
|
4673 |
*/
|
|
|
4674 |
hash_head = 0/*NIL*/;
|
|
|
4675 |
if (s.lookahead >= MIN_MATCH) {
|
|
|
4676 |
/*** INSERT_STRING(s, s.strstart, hash_head); ***/
|
|
|
4677 |
s.ins_h = ((s.ins_h << s.hash_shift) ^ s.window[s.strstart + MIN_MATCH - 1]) & s.hash_mask;
|
|
|
4678 |
hash_head = s.prev[s.strstart & s.w_mask] = s.head[s.ins_h];
|
|
|
4679 |
s.head[s.ins_h] = s.strstart;
|
|
|
4680 |
/***/
|
|
|
4681 |
}
|
|
|
4682 |
|
|
|
4683 |
/* Find the longest match, discarding those <= prev_length.
|
|
|
4684 |
*/
|
|
|
4685 |
s.prev_length = s.match_length;
|
|
|
4686 |
s.prev_match = s.match_start;
|
|
|
4687 |
s.match_length = MIN_MATCH-1;
|
|
|
4688 |
|
|
|
4689 |
if (hash_head !== 0/*NIL*/ && s.prev_length < s.max_lazy_match &&
|
|
|
4690 |
s.strstart - hash_head <= (s.w_size-MIN_LOOKAHEAD)/*MAX_DIST(s)*/) {
|
|
|
4691 |
/* To simplify the code, we prevent matches with the string
|
|
|
4692 |
* of window index 0 (in particular we have to avoid a match
|
|
|
4693 |
* of the string with itself at the start of the input file).
|
|
|
4694 |
*/
|
|
|
4695 |
s.match_length = longest_match(s, hash_head);
|
|
|
4696 |
/* longest_match() sets match_start */
|
|
|
4697 |
|
|
|
4698 |
if (s.match_length <= 5 &&
|
|
|
4699 |
(s.strategy === Z_FILTERED || (s.match_length === MIN_MATCH && s.strstart - s.match_start > 4096/*TOO_FAR*/))) {
|
|
|
4700 |
|
|
|
4701 |
/* If prev_match is also MIN_MATCH, match_start is garbage
|
|
|
4702 |
* but we will ignore the current match anyway.
|
|
|
4703 |
*/
|
|
|
4704 |
s.match_length = MIN_MATCH-1;
|
|
|
4705 |
}
|
|
|
4706 |
}
|
|
|
4707 |
/* If there was a match at the previous step and the current
|
|
|
4708 |
* match is not better, output the previous match:
|
|
|
4709 |
*/
|
|
|
4710 |
if (s.prev_length >= MIN_MATCH && s.match_length <= s.prev_length) {
|
|
|
4711 |
max_insert = s.strstart + s.lookahead - MIN_MATCH;
|
|
|
4712 |
/* Do not insert strings in hash table beyond this. */
|
|
|
4713 |
|
|
|
4714 |
//check_match(s, s.strstart-1, s.prev_match, s.prev_length);
|
|
|
4715 |
|
|
|
4716 |
/***_tr_tally_dist(s, s.strstart - 1 - s.prev_match,
|
|
|
4717 |
s.prev_length - MIN_MATCH, bflush);***/
|
|
|
4718 |
bflush = trees._tr_tally(s, s.strstart - 1- s.prev_match, s.prev_length - MIN_MATCH);
|
|
|
4719 |
/* Insert in hash table all strings up to the end of the match.
|
|
|
4720 |
* strstart-1 and strstart are already inserted. If there is not
|
|
|
4721 |
* enough lookahead, the last two strings are not inserted in
|
|
|
4722 |
* the hash table.
|
|
|
4723 |
*/
|
|
|
4724 |
s.lookahead -= s.prev_length-1;
|
|
|
4725 |
s.prev_length -= 2;
|
|
|
4726 |
do {
|
|
|
4727 |
if (++s.strstart <= max_insert) {
|
|
|
4728 |
/*** INSERT_STRING(s, s.strstart, hash_head); ***/
|
|
|
4729 |
s.ins_h = ((s.ins_h << s.hash_shift) ^ s.window[s.strstart + MIN_MATCH - 1]) & s.hash_mask;
|
|
|
4730 |
hash_head = s.prev[s.strstart & s.w_mask] = s.head[s.ins_h];
|
|
|
4731 |
s.head[s.ins_h] = s.strstart;
|
|
|
4732 |
/***/
|
|
|
4733 |
}
|
|
|
4734 |
} while (--s.prev_length !== 0);
|
|
|
4735 |
s.match_available = 0;
|
|
|
4736 |
s.match_length = MIN_MATCH-1;
|
|
|
4737 |
s.strstart++;
|
|
|
4738 |
|
|
|
4739 |
if (bflush) {
|
|
|
4740 |
/*** FLUSH_BLOCK(s, 0); ***/
|
|
|
4741 |
flush_block_only(s, false);
|
|
|
4742 |
if (s.strm.avail_out === 0) {
|
|
|
4743 |
return BS_NEED_MORE;
|
|
|
4744 |
}
|
|
|
4745 |
/***/
|
|
|
4746 |
}
|
|
|
4747 |
|
|
|
4748 |
} else if (s.match_available) {
|
|
|
4749 |
/* If there was no match at the previous position, output a
|
|
|
4750 |
* single literal. If there was a match but the current match
|
|
|
4751 |
* is longer, truncate the previous match to a single literal.
|
|
|
4752 |
*/
|
|
|
4753 |
//Tracevv((stderr,"%c", s->window[s->strstart-1]));
|
|
|
4754 |
/*** _tr_tally_lit(s, s.window[s.strstart-1], bflush); ***/
|
|
|
4755 |
bflush = trees._tr_tally(s, 0, s.window[s.strstart-1]);
|
|
|
4756 |
|
|
|
4757 |
if (bflush) {
|
|
|
4758 |
/*** FLUSH_BLOCK_ONLY(s, 0) ***/
|
|
|
4759 |
flush_block_only(s, false);
|
|
|
4760 |
/***/
|
|
|
4761 |
}
|
|
|
4762 |
s.strstart++;
|
|
|
4763 |
s.lookahead--;
|
|
|
4764 |
if (s.strm.avail_out === 0) {
|
|
|
4765 |
return BS_NEED_MORE;
|
|
|
4766 |
}
|
|
|
4767 |
} else {
|
|
|
4768 |
/* There is no previous match to compare with, wait for
|
|
|
4769 |
* the next step to decide.
|
|
|
4770 |
*/
|
|
|
4771 |
s.match_available = 1;
|
|
|
4772 |
s.strstart++;
|
|
|
4773 |
s.lookahead--;
|
|
|
4774 |
}
|
|
|
4775 |
}
|
|
|
4776 |
//Assert (flush != Z_NO_FLUSH, "no flush?");
|
|
|
4777 |
if (s.match_available) {
|
|
|
4778 |
//Tracevv((stderr,"%c", s->window[s->strstart-1]));
|
|
|
4779 |
/*** _tr_tally_lit(s, s.window[s.strstart-1], bflush); ***/
|
|
|
4780 |
bflush = trees._tr_tally(s, 0, s.window[s.strstart-1]);
|
|
|
4781 |
|
|
|
4782 |
s.match_available = 0;
|
|
|
4783 |
}
|
|
|
4784 |
s.insert = s.strstart < MIN_MATCH-1 ? s.strstart : MIN_MATCH-1;
|
|
|
4785 |
if (flush === Z_FINISH) {
|
|
|
4786 |
/*** FLUSH_BLOCK(s, 1); ***/
|
|
|
4787 |
flush_block_only(s, true);
|
|
|
4788 |
if (s.strm.avail_out === 0) {
|
|
|
4789 |
return BS_FINISH_STARTED;
|
|
|
4790 |
}
|
|
|
4791 |
/***/
|
|
|
4792 |
return BS_FINISH_DONE;
|
|
|
4793 |
}
|
|
|
4794 |
if (s.last_lit) {
|
|
|
4795 |
/*** FLUSH_BLOCK(s, 0); ***/
|
|
|
4796 |
flush_block_only(s, false);
|
|
|
4797 |
if (s.strm.avail_out === 0) {
|
|
|
4798 |
return BS_NEED_MORE;
|
|
|
4799 |
}
|
|
|
4800 |
/***/
|
|
|
4801 |
}
|
|
|
4802 |
|
|
|
4803 |
return BS_BLOCK_DONE;
|
|
|
4804 |
}
|
|
|
4805 |
|
|
|
4806 |
|
|
|
4807 |
/* ===========================================================================
|
|
|
4808 |
* For Z_RLE, simply look for runs of bytes, generate matches only of distance
|
|
|
4809 |
* one. Do not maintain a hash table. (It will be regenerated if this run of
|
|
|
4810 |
* deflate switches away from Z_RLE.)
|
|
|
4811 |
*/
|
|
|
4812 |
function deflate_rle(s, flush) {
|
|
|
4813 |
var bflush; /* set if current block must be flushed */
|
|
|
4814 |
var prev; /* byte at distance one to match */
|
|
|
4815 |
var scan, strend; /* scan goes up to strend for length of run */
|
|
|
4816 |
|
|
|
4817 |
var _win = s.window;
|
|
|
4818 |
|
|
|
4819 |
for (;;) {
|
|
|
4820 |
/* Make sure that we always have enough lookahead, except
|
|
|
4821 |
* at the end of the input file. We need MAX_MATCH bytes
|
|
|
4822 |
* for the longest run, plus one for the unrolled loop.
|
|
|
4823 |
*/
|
|
|
4824 |
if (s.lookahead <= MAX_MATCH) {
|
|
|
4825 |
fill_window(s);
|
|
|
4826 |
if (s.lookahead <= MAX_MATCH && flush === Z_NO_FLUSH) {
|
|
|
4827 |
return BS_NEED_MORE;
|
|
|
4828 |
}
|
|
|
4829 |
if (s.lookahead === 0) { break; } /* flush the current block */
|
|
|
4830 |
}
|
|
|
4831 |
|
|
|
4832 |
/* See how many times the previous byte repeats */
|
|
|
4833 |
s.match_length = 0;
|
|
|
4834 |
if (s.lookahead >= MIN_MATCH && s.strstart > 0) {
|
|
|
4835 |
scan = s.strstart - 1;
|
|
|
4836 |
prev = _win[scan];
|
|
|
4837 |
if (prev === _win[++scan] && prev === _win[++scan] && prev === _win[++scan]) {
|
|
|
4838 |
strend = s.strstart + MAX_MATCH;
|
|
|
4839 |
do {
|
|
|
4840 |
/*jshint noempty:false*/
|
|
|
4841 |
} while (prev === _win[++scan] && prev === _win[++scan] &&
|
|
|
4842 |
prev === _win[++scan] && prev === _win[++scan] &&
|
|
|
4843 |
prev === _win[++scan] && prev === _win[++scan] &&
|
|
|
4844 |
prev === _win[++scan] && prev === _win[++scan] &&
|
|
|
4845 |
scan < strend);
|
|
|
4846 |
s.match_length = MAX_MATCH - (strend - scan);
|
|
|
4847 |
if (s.match_length > s.lookahead) {
|
|
|
4848 |
s.match_length = s.lookahead;
|
|
|
4849 |
}
|
|
|
4850 |
}
|
|
|
4851 |
//Assert(scan <= s->window+(uInt)(s->window_size-1), "wild scan");
|
|
|
4852 |
}
|
|
|
4853 |
|
|
|
4854 |
/* Emit match if have run of MIN_MATCH or longer, else emit literal */
|
|
|
4855 |
if (s.match_length >= MIN_MATCH) {
|
|
|
4856 |
//check_match(s, s.strstart, s.strstart - 1, s.match_length);
|
|
|
4857 |
|
|
|
4858 |
/*** _tr_tally_dist(s, 1, s.match_length - MIN_MATCH, bflush); ***/
|
|
|
4859 |
bflush = trees._tr_tally(s, 1, s.match_length - MIN_MATCH);
|
|
|
4860 |
|
|
|
4861 |
s.lookahead -= s.match_length;
|
|
|
4862 |
s.strstart += s.match_length;
|
|
|
4863 |
s.match_length = 0;
|
|
|
4864 |
} else {
|
|
|
4865 |
/* No match, output a literal byte */
|
|
|
4866 |
//Tracevv((stderr,"%c", s->window[s->strstart]));
|
|
|
4867 |
/*** _tr_tally_lit(s, s.window[s.strstart], bflush); ***/
|
|
|
4868 |
bflush = trees._tr_tally(s, 0, s.window[s.strstart]);
|
|
|
4869 |
|
|
|
4870 |
s.lookahead--;
|
|
|
4871 |
s.strstart++;
|
|
|
4872 |
}
|
|
|
4873 |
if (bflush) {
|
|
|
4874 |
/*** FLUSH_BLOCK(s, 0); ***/
|
|
|
4875 |
flush_block_only(s, false);
|
|
|
4876 |
if (s.strm.avail_out === 0) {
|
|
|
4877 |
return BS_NEED_MORE;
|
|
|
4878 |
}
|
|
|
4879 |
/***/
|
|
|
4880 |
}
|
|
|
4881 |
}
|
|
|
4882 |
s.insert = 0;
|
|
|
4883 |
if (flush === Z_FINISH) {
|
|
|
4884 |
/*** FLUSH_BLOCK(s, 1); ***/
|
|
|
4885 |
flush_block_only(s, true);
|
|
|
4886 |
if (s.strm.avail_out === 0) {
|
|
|
4887 |
return BS_FINISH_STARTED;
|
|
|
4888 |
}
|
|
|
4889 |
/***/
|
|
|
4890 |
return BS_FINISH_DONE;
|
|
|
4891 |
}
|
|
|
4892 |
if (s.last_lit) {
|
|
|
4893 |
/*** FLUSH_BLOCK(s, 0); ***/
|
|
|
4894 |
flush_block_only(s, false);
|
|
|
4895 |
if (s.strm.avail_out === 0) {
|
|
|
4896 |
return BS_NEED_MORE;
|
|
|
4897 |
}
|
|
|
4898 |
/***/
|
|
|
4899 |
}
|
|
|
4900 |
return BS_BLOCK_DONE;
|
|
|
4901 |
}
|
|
|
4902 |
|
|
|
4903 |
/* ===========================================================================
|
|
|
4904 |
* For Z_HUFFMAN_ONLY, do not look for matches. Do not maintain a hash table.
|
|
|
4905 |
* (It will be regenerated if this run of deflate switches away from Huffman.)
|
|
|
4906 |
*/
|
|
|
4907 |
function deflate_huff(s, flush) {
|
|
|
4908 |
var bflush; /* set if current block must be flushed */
|
|
|
4909 |
|
|
|
4910 |
for (;;) {
|
|
|
4911 |
/* Make sure that we have a literal to write. */
|
|
|
4912 |
if (s.lookahead === 0) {
|
|
|
4913 |
fill_window(s);
|
|
|
4914 |
if (s.lookahead === 0) {
|
|
|
4915 |
if (flush === Z_NO_FLUSH) {
|
|
|
4916 |
return BS_NEED_MORE;
|
|
|
4917 |
}
|
|
|
4918 |
break; /* flush the current block */
|
|
|
4919 |
}
|
|
|
4920 |
}
|
|
|
4921 |
|
|
|
4922 |
/* Output a literal byte */
|
|
|
4923 |
s.match_length = 0;
|
|
|
4924 |
//Tracevv((stderr,"%c", s->window[s->strstart]));
|
|
|
4925 |
/*** _tr_tally_lit(s, s.window[s.strstart], bflush); ***/
|
|
|
4926 |
bflush = trees._tr_tally(s, 0, s.window[s.strstart]);
|
|
|
4927 |
s.lookahead--;
|
|
|
4928 |
s.strstart++;
|
|
|
4929 |
if (bflush) {
|
|
|
4930 |
/*** FLUSH_BLOCK(s, 0); ***/
|
|
|
4931 |
flush_block_only(s, false);
|
|
|
4932 |
if (s.strm.avail_out === 0) {
|
|
|
4933 |
return BS_NEED_MORE;
|
|
|
4934 |
}
|
|
|
4935 |
/***/
|
|
|
4936 |
}
|
|
|
4937 |
}
|
|
|
4938 |
s.insert = 0;
|
|
|
4939 |
if (flush === Z_FINISH) {
|
|
|
4940 |
/*** FLUSH_BLOCK(s, 1); ***/
|
|
|
4941 |
flush_block_only(s, true);
|
|
|
4942 |
if (s.strm.avail_out === 0) {
|
|
|
4943 |
return BS_FINISH_STARTED;
|
|
|
4944 |
}
|
|
|
4945 |
/***/
|
|
|
4946 |
return BS_FINISH_DONE;
|
|
|
4947 |
}
|
|
|
4948 |
if (s.last_lit) {
|
|
|
4949 |
/*** FLUSH_BLOCK(s, 0); ***/
|
|
|
4950 |
flush_block_only(s, false);
|
|
|
4951 |
if (s.strm.avail_out === 0) {
|
|
|
4952 |
return BS_NEED_MORE;
|
|
|
4953 |
}
|
|
|
4954 |
/***/
|
|
|
4955 |
}
|
|
|
4956 |
return BS_BLOCK_DONE;
|
|
|
4957 |
}
|
|
|
4958 |
|
|
|
4959 |
/* Values for max_lazy_match, good_match and max_chain_length, depending on
|
|
|
4960 |
* the desired pack level (0..9). The values given below have been tuned to
|
|
|
4961 |
* exclude worst case performance for pathological files. Better values may be
|
|
|
4962 |
* found for specific files.
|
|
|
4963 |
*/
|
|
|
4964 |
var Config = function (good_length, max_lazy, nice_length, max_chain, func) {
|
|
|
4965 |
this.good_length = good_length;
|
|
|
4966 |
this.max_lazy = max_lazy;
|
|
|
4967 |
this.nice_length = nice_length;
|
|
|
4968 |
this.max_chain = max_chain;
|
|
|
4969 |
this.func = func;
|
|
|
4970 |
};
|
|
|
4971 |
|
|
|
4972 |
var configuration_table;
|
|
|
4973 |
|
|
|
4974 |
configuration_table = [
|
|
|
4975 |
/* good lazy nice chain */
|
|
|
4976 |
new Config(0, 0, 0, 0, deflate_stored), /* 0 store only */
|
|
|
4977 |
new Config(4, 4, 8, 4, deflate_fast), /* 1 max speed, no lazy matches */
|
|
|
4978 |
new Config(4, 5, 16, 8, deflate_fast), /* 2 */
|
|
|
4979 |
new Config(4, 6, 32, 32, deflate_fast), /* 3 */
|
|
|
4980 |
|
|
|
4981 |
new Config(4, 4, 16, 16, deflate_slow), /* 4 lazy matches */
|
|
|
4982 |
new Config(8, 16, 32, 32, deflate_slow), /* 5 */
|
|
|
4983 |
new Config(8, 16, 128, 128, deflate_slow), /* 6 */
|
|
|
4984 |
new Config(8, 32, 128, 256, deflate_slow), /* 7 */
|
|
|
4985 |
new Config(32, 128, 258, 1024, deflate_slow), /* 8 */
|
|
|
4986 |
new Config(32, 258, 258, 4096, deflate_slow) /* 9 max compression */
|
|
|
4987 |
];
|
|
|
4988 |
|
|
|
4989 |
|
|
|
4990 |
/* ===========================================================================
|
|
|
4991 |
* Initialize the "longest match" routines for a new zlib stream
|
|
|
4992 |
*/
|
|
|
4993 |
function lm_init(s) {
|
|
|
4994 |
s.window_size = 2 * s.w_size;
|
|
|
4995 |
|
|
|
4996 |
/*** CLEAR_HASH(s); ***/
|
|
|
4997 |
zero(s.head); // Fill with NIL (= 0);
|
|
|
4998 |
|
|
|
4999 |
/* Set the default configuration parameters:
|
|
|
5000 |
*/
|
|
|
5001 |
s.max_lazy_match = configuration_table[s.level].max_lazy;
|
|
|
5002 |
s.good_match = configuration_table[s.level].good_length;
|
|
|
5003 |
s.nice_match = configuration_table[s.level].nice_length;
|
|
|
5004 |
s.max_chain_length = configuration_table[s.level].max_chain;
|
|
|
5005 |
|
|
|
5006 |
s.strstart = 0;
|
|
|
5007 |
s.block_start = 0;
|
|
|
5008 |
s.lookahead = 0;
|
|
|
5009 |
s.insert = 0;
|
|
|
5010 |
s.match_length = s.prev_length = MIN_MATCH - 1;
|
|
|
5011 |
s.match_available = 0;
|
|
|
5012 |
s.ins_h = 0;
|
|
|
5013 |
}
|
|
|
5014 |
|
|
|
5015 |
|
|
|
5016 |
function DeflateState() {
|
|
|
5017 |
this.strm = null; /* pointer back to this zlib stream */
|
|
|
5018 |
this.status = 0; /* as the name implies */
|
|
|
5019 |
this.pending_buf = null; /* output still pending */
|
|
|
5020 |
this.pending_buf_size = 0; /* size of pending_buf */
|
|
|
5021 |
this.pending_out = 0; /* next pending byte to output to the stream */
|
|
|
5022 |
this.pending = 0; /* nb of bytes in the pending buffer */
|
|
|
5023 |
this.wrap = 0; /* bit 0 true for zlib, bit 1 true for gzip */
|
|
|
5024 |
this.gzhead = null; /* gzip header information to write */
|
|
|
5025 |
this.gzindex = 0; /* where in extra, name, or comment */
|
|
|
5026 |
this.method = Z_DEFLATED; /* can only be DEFLATED */
|
|
|
5027 |
this.last_flush = -1; /* value of flush param for previous deflate call */
|
|
|
5028 |
|
|
|
5029 |
this.w_size = 0; /* LZ77 window size (32K by default) */
|
|
|
5030 |
this.w_bits = 0; /* log2(w_size) (8..16) */
|
|
|
5031 |
this.w_mask = 0; /* w_size - 1 */
|
|
|
5032 |
|
|
|
5033 |
this.window = null;
|
|
|
5034 |
/* Sliding window. Input bytes are read into the second half of the window,
|
|
|
5035 |
* and move to the first half later to keep a dictionary of at least wSize
|
|
|
5036 |
* bytes. With this organization, matches are limited to a distance of
|
|
|
5037 |
* wSize-MAX_MATCH bytes, but this ensures that IO is always
|
|
|
5038 |
* performed with a length multiple of the block size.
|
|
|
5039 |
*/
|
|
|
5040 |
|
|
|
5041 |
this.window_size = 0;
|
|
|
5042 |
/* Actual size of window: 2*wSize, except when the user input buffer
|
|
|
5043 |
* is directly used as sliding window.
|
|
|
5044 |
*/
|
|
|
5045 |
|
|
|
5046 |
this.prev = null;
|
|
|
5047 |
/* Link to older string with same hash index. To limit the size of this
|
|
|
5048 |
* array to 64K, this link is maintained only for the last 32K strings.
|
|
|
5049 |
* An index in this array is thus a window index modulo 32K.
|
|
|
5050 |
*/
|
|
|
5051 |
|
|
|
5052 |
this.head = null; /* Heads of the hash chains or NIL. */
|
|
|
5053 |
|
|
|
5054 |
this.ins_h = 0; /* hash index of string to be inserted */
|
|
|
5055 |
this.hash_size = 0; /* number of elements in hash table */
|
|
|
5056 |
this.hash_bits = 0; /* log2(hash_size) */
|
|
|
5057 |
this.hash_mask = 0; /* hash_size-1 */
|
|
|
5058 |
|
|
|
5059 |
this.hash_shift = 0;
|
|
|
5060 |
/* Number of bits by which ins_h must be shifted at each input
|
|
|
5061 |
* step. It must be such that after MIN_MATCH steps, the oldest
|
|
|
5062 |
* byte no longer takes part in the hash key, that is:
|
|
|
5063 |
* hash_shift * MIN_MATCH >= hash_bits
|
|
|
5064 |
*/
|
|
|
5065 |
|
|
|
5066 |
this.block_start = 0;
|
|
|
5067 |
/* Window position at the beginning of the current output block. Gets
|
|
|
5068 |
* negative when the window is moved backwards.
|
|
|
5069 |
*/
|
|
|
5070 |
|
|
|
5071 |
this.match_length = 0; /* length of best match */
|
|
|
5072 |
this.prev_match = 0; /* previous match */
|
|
|
5073 |
this.match_available = 0; /* set if previous match exists */
|
|
|
5074 |
this.strstart = 0; /* start of string to insert */
|
|
|
5075 |
this.match_start = 0; /* start of matching string */
|
|
|
5076 |
this.lookahead = 0; /* number of valid bytes ahead in window */
|
|
|
5077 |
|
|
|
5078 |
this.prev_length = 0;
|
|
|
5079 |
/* Length of the best match at previous step. Matches not greater than this
|
|
|
5080 |
* are discarded. This is used in the lazy match evaluation.
|
|
|
5081 |
*/
|
|
|
5082 |
|
|
|
5083 |
this.max_chain_length = 0;
|
|
|
5084 |
/* To speed up deflation, hash chains are never searched beyond this
|
|
|
5085 |
* length. A higher limit improves compression ratio but degrades the
|
|
|
5086 |
* speed.
|
|
|
5087 |
*/
|
|
|
5088 |
|
|
|
5089 |
this.max_lazy_match = 0;
|
|
|
5090 |
/* Attempt to find a better match only when the current match is strictly
|
|
|
5091 |
* smaller than this value. This mechanism is used only for compression
|
|
|
5092 |
* levels >= 4.
|
|
|
5093 |
*/
|
|
|
5094 |
// That's alias to max_lazy_match, don't use directly
|
|
|
5095 |
//this.max_insert_length = 0;
|
|
|
5096 |
/* Insert new strings in the hash table only if the match length is not
|
|
|
5097 |
* greater than this length. This saves time but degrades compression.
|
|
|
5098 |
* max_insert_length is used only for compression levels <= 3.
|
|
|
5099 |
*/
|
|
|
5100 |
|
|
|
5101 |
this.level = 0; /* compression level (1..9) */
|
|
|
5102 |
this.strategy = 0; /* favor or force Huffman coding*/
|
|
|
5103 |
|
|
|
5104 |
this.good_match = 0;
|
|
|
5105 |
/* Use a faster search when the previous match is longer than this */
|
|
|
5106 |
|
|
|
5107 |
this.nice_match = 0; /* Stop searching when current match exceeds this */
|
|
|
5108 |
|
|
|
5109 |
/* used by trees.c: */
|
|
|
5110 |
|
|
|
5111 |
/* Didn't use ct_data typedef below to suppress compiler warning */
|
|
|
5112 |
|
|
|
5113 |
// struct ct_data_s dyn_ltree[HEAP_SIZE]; /* literal and length tree */
|
|
|
5114 |
// struct ct_data_s dyn_dtree[2*D_CODES+1]; /* distance tree */
|
|
|
5115 |
// struct ct_data_s bl_tree[2*BL_CODES+1]; /* Huffman tree for bit lengths */
|
|
|
5116 |
|
|
|
5117 |
// Use flat array of DOUBLE size, with interleaved fata,
|
|
|
5118 |
// because JS does not support effective
|
|
|
5119 |
this.dyn_ltree = new utils.Buf16(HEAP_SIZE * 2);
|
|
|
5120 |
this.dyn_dtree = new utils.Buf16((2*D_CODES+1) * 2);
|
|
|
5121 |
this.bl_tree = new utils.Buf16((2*BL_CODES+1) * 2);
|
|
|
5122 |
zero(this.dyn_ltree);
|
|
|
5123 |
zero(this.dyn_dtree);
|
|
|
5124 |
zero(this.bl_tree);
|
|
|
5125 |
|
|
|
5126 |
this.l_desc = null; /* desc. for literal tree */
|
|
|
5127 |
this.d_desc = null; /* desc. for distance tree */
|
|
|
5128 |
this.bl_desc = null; /* desc. for bit length tree */
|
|
|
5129 |
|
|
|
5130 |
//ush bl_count[MAX_BITS+1];
|
|
|
5131 |
this.bl_count = new utils.Buf16(MAX_BITS+1);
|
|
|
5132 |
/* number of codes at each bit length for an optimal tree */
|
|
|
5133 |
|
|
|
5134 |
//int heap[2*L_CODES+1]; /* heap used to build the Huffman trees */
|
|
|
5135 |
this.heap = new utils.Buf16(2*L_CODES+1); /* heap used to build the Huffman trees */
|
|
|
5136 |
zero(this.heap);
|
|
|
5137 |
|
|
|
5138 |
this.heap_len = 0; /* number of elements in the heap */
|
|
|
5139 |
this.heap_max = 0; /* element of largest frequency */
|
|
|
5140 |
/* The sons of heap[n] are heap[2*n] and heap[2*n+1]. heap[0] is not used.
|
|
|
5141 |
* The same heap array is used to build all trees.
|
|
|
5142 |
*/
|
|
|
5143 |
|
|
|
5144 |
this.depth = new utils.Buf16(2*L_CODES+1); //uch depth[2*L_CODES+1];
|
|
|
5145 |
zero(this.depth);
|
|
|
5146 |
/* Depth of each subtree used as tie breaker for trees of equal frequency
|
|
|
5147 |
*/
|
|
|
5148 |
|
|
|
5149 |
this.l_buf = 0; /* buffer index for literals or lengths */
|
|
|
5150 |
|
|
|
5151 |
this.lit_bufsize = 0;
|
|
|
5152 |
/* Size of match buffer for literals/lengths. There are 4 reasons for
|
|
|
5153 |
* limiting lit_bufsize to 64K:
|
|
|
5154 |
* - frequencies can be kept in 16 bit counters
|
|
|
5155 |
* - if compression is not successful for the first block, all input
|
|
|
5156 |
* data is still in the window so we can still emit a stored block even
|
|
|
5157 |
* when input comes from standard input. (This can also be done for
|
|
|
5158 |
* all blocks if lit_bufsize is not greater than 32K.)
|
|
|
5159 |
* - if compression is not successful for a file smaller than 64K, we can
|
|
|
5160 |
* even emit a stored file instead of a stored block (saving 5 bytes).
|
|
|
5161 |
* This is applicable only for zip (not gzip or zlib).
|
|
|
5162 |
* - creating new Huffman trees less frequently may not provide fast
|
|
|
5163 |
* adaptation to changes in the input data statistics. (Take for
|
|
|
5164 |
* example a binary file with poorly compressible code followed by
|
|
|
5165 |
* a highly compressible string table.) Smaller buffer sizes give
|
|
|
5166 |
* fast adaptation but have of course the overhead of transmitting
|
|
|
5167 |
* trees more frequently.
|
|
|
5168 |
* - I can't count above 4
|
|
|
5169 |
*/
|
|
|
5170 |
|
|
|
5171 |
this.last_lit = 0; /* running index in l_buf */
|
|
|
5172 |
|
|
|
5173 |
this.d_buf = 0;
|
|
|
5174 |
/* Buffer index for distances. To simplify the code, d_buf and l_buf have
|
|
|
5175 |
* the same number of elements. To use different lengths, an extra flag
|
|
|
5176 |
* array would be necessary.
|
|
|
5177 |
*/
|
|
|
5178 |
|
|
|
5179 |
this.opt_len = 0; /* bit length of current block with optimal trees */
|
|
|
5180 |
this.static_len = 0; /* bit length of current block with static trees */
|
|
|
5181 |
this.matches = 0; /* number of string matches in current block */
|
|
|
5182 |
this.insert = 0; /* bytes at end of window left to insert */
|
|
|
5183 |
|
|
|
5184 |
|
|
|
5185 |
this.bi_buf = 0;
|
|
|
5186 |
/* Output buffer. bits are inserted starting at the bottom (least
|
|
|
5187 |
* significant bits).
|
|
|
5188 |
*/
|
|
|
5189 |
this.bi_valid = 0;
|
|
|
5190 |
/* Number of valid bits in bi_buf. All bits above the last valid bit
|
|
|
5191 |
* are always zero.
|
|
|
5192 |
*/
|
|
|
5193 |
|
|
|
5194 |
// Used for window memory init. We safely ignore it for JS. That makes
|
|
|
5195 |
// sense only for pointers and memory check tools.
|
|
|
5196 |
//this.high_water = 0;
|
|
|
5197 |
/* High water mark offset in window for initialized bytes -- bytes above
|
|
|
5198 |
* this are set to zero in order to avoid memory check warnings when
|
|
|
5199 |
* longest match routines access bytes past the input. This is then
|
|
|
5200 |
* updated to the new high water mark.
|
|
|
5201 |
*/
|
|
|
5202 |
}
|
|
|
5203 |
|
|
|
5204 |
|
|
|
5205 |
function deflateResetKeep(strm) {
|
|
|
5206 |
var s;
|
|
|
5207 |
|
|
|
5208 |
if (!strm || !strm.state) {
|
|
|
5209 |
return err(strm, Z_STREAM_ERROR);
|
|
|
5210 |
}
|
|
|
5211 |
|
|
|
5212 |
strm.total_in = strm.total_out = 0;
|
|
|
5213 |
strm.data_type = Z_UNKNOWN;
|
|
|
5214 |
|
|
|
5215 |
s = strm.state;
|
|
|
5216 |
s.pending = 0;
|
|
|
5217 |
s.pending_out = 0;
|
|
|
5218 |
|
|
|
5219 |
if (s.wrap < 0) {
|
|
|
5220 |
s.wrap = -s.wrap;
|
|
|
5221 |
/* was made negative by deflate(..., Z_FINISH); */
|
|
|
5222 |
}
|
|
|
5223 |
s.status = (s.wrap ? INIT_STATE : BUSY_STATE);
|
|
|
5224 |
strm.adler = (s.wrap === 2) ?
|
|
|
5225 |
|
|
|
5226 |
:
|
|
|
5227 |
1; // adler32(0, Z_NULL, 0)
|
|
|
5228 |
s.last_flush = Z_NO_FLUSH;
|
|
|
5229 |
trees._tr_init(s);
|
|
|
5230 |
return Z_OK;
|
|
|
5231 |
}
|
|
|
5232 |
|
|
|
5233 |
|
|
|
5234 |
function deflateReset(strm) {
|
|
|
5235 |
var ret = deflateResetKeep(strm);
|
|
|
5236 |
if (ret === Z_OK) {
|
|
|
5237 |
lm_init(strm.state);
|
|
|
5238 |
}
|
|
|
5239 |
return ret;
|
|
|
5240 |
}
|
|
|
5241 |
|
|
|
5242 |
|
|
|
5243 |
function deflateSetHeader(strm, head) {
|
|
|
5244 |
if (!strm || !strm.state) { return Z_STREAM_ERROR; }
|
|
|
5245 |
if (strm.state.wrap !== 2) { return Z_STREAM_ERROR; }
|
|
|
5246 |
strm.state.gzhead = head;
|
|
|
5247 |
return Z_OK;
|
|
|
5248 |
}
|
|
|
5249 |
|
|
|
5250 |
|
|
|
5251 |
function deflateInit2(strm, level, method, windowBits, memLevel, strategy) {
|
|
|
5252 |
if (!strm) { // === Z_NULL
|
|
|
5253 |
return Z_STREAM_ERROR;
|
|
|
5254 |
}
|
|
|
5255 |
var wrap = 1;
|
|
|
5256 |
|
|
|
5257 |
if (level === Z_DEFAULT_COMPRESSION) {
|
|
|
5258 |
level = 6;
|
|
|
5259 |
}
|
|
|
5260 |
|
|
|
5261 |
if (windowBits < 0) { /* suppress zlib wrapper */
|
|
|
5262 |
wrap = 0;
|
|
|
5263 |
windowBits = -windowBits;
|
|
|
5264 |
}
|
|
|
5265 |
|
|
|
5266 |
else if (windowBits > 15) {
|
|
|
5267 |
wrap = 2; /* write gzip wrapper instead */
|
|
|
5268 |
windowBits -= 16;
|
|
|
5269 |
}
|
|
|
5270 |
|
|
|
5271 |
|
|
|
5272 |
if (memLevel < 1 || memLevel > MAX_MEM_LEVEL || method !== Z_DEFLATED ||
|
|
|
5273 |
windowBits < 8 || windowBits > 15 || level < 0 || level > 9 ||
|
|
|
5274 |
strategy < 0 || strategy > Z_FIXED) {
|
|
|
5275 |
return err(strm, Z_STREAM_ERROR);
|
|
|
5276 |
}
|
|
|
5277 |
|
|
|
5278 |
|
|
|
5279 |
if (windowBits === 8) {
|
|
|
5280 |
windowBits = 9;
|
|
|
5281 |
}
|
|
|
5282 |
/* until 256-byte window bug fixed */
|
|
|
5283 |
|
|
|
5284 |
var s = new DeflateState();
|
|
|
5285 |
|
|
|
5286 |
strm.state = s;
|
|
|
5287 |
s.strm = strm;
|
|
|
5288 |
|
|
|
5289 |
s.wrap = wrap;
|
|
|
5290 |
s.gzhead = null;
|
|
|
5291 |
s.w_bits = windowBits;
|
|
|
5292 |
s.w_size = 1 << s.w_bits;
|
|
|
5293 |
s.w_mask = s.w_size - 1;
|
|
|
5294 |
|
|
|
5295 |
s.hash_bits = memLevel + 7;
|
|
|
5296 |
s.hash_size = 1 << s.hash_bits;
|
|
|
5297 |
s.hash_mask = s.hash_size - 1;
|
|
|
5298 |
s.hash_shift = ~~((s.hash_bits + MIN_MATCH - 1) / MIN_MATCH);
|
|
|
5299 |
|
|
|
5300 |
s.window = new utils.Buf8(s.w_size * 2);
|
|
|
5301 |
s.head = new utils.Buf16(s.hash_size);
|
|
|
5302 |
s.prev = new utils.Buf16(s.w_size);
|
|
|
5303 |
|
|
|
5304 |
// Don't need mem init magic for JS.
|
|
|
5305 |
//s.high_water = 0; /* nothing written to s->window yet */
|
|
|
5306 |
|
|
|
5307 |
s.lit_bufsize = 1 << (memLevel + 6); /* 16K elements by default */
|
|
|
5308 |
|
|
|
5309 |
s.pending_buf_size = s.lit_bufsize * 4;
|
|
|
5310 |
s.pending_buf = new utils.Buf8(s.pending_buf_size);
|
|
|
5311 |
|
|
|
5312 |
s.d_buf = s.lit_bufsize >> 1;
|
|
|
5313 |
s.l_buf = (1 + 2) * s.lit_bufsize;
|
|
|
5314 |
|
|
|
5315 |
s.level = level;
|
|
|
5316 |
s.strategy = strategy;
|
|
|
5317 |
s.method = method;
|
|
|
5318 |
|
|
|
5319 |
return deflateReset(strm);
|
|
|
5320 |
}
|
|
|
5321 |
|
|
|
5322 |
function deflateInit(strm, level) {
|
|
|
5323 |
return deflateInit2(strm, level, Z_DEFLATED, MAX_WBITS, DEF_MEM_LEVEL, Z_DEFAULT_STRATEGY);
|
|
|
5324 |
}
|
|
|
5325 |
|
|
|
5326 |
|
|
|
5327 |
function deflate(strm, flush) {
|
|
|
5328 |
var old_flush, s;
|
|
|
5329 |
var beg, val; // for gzip header write only
|
|
|
5330 |
|
|
|
5331 |
if (!strm || !strm.state ||
|
|
|
5332 |
flush > Z_BLOCK || flush < 0) {
|
|
|
5333 |
return strm ? err(strm, Z_STREAM_ERROR) : Z_STREAM_ERROR;
|
|
|
5334 |
}
|
|
|
5335 |
|
|
|
5336 |
s = strm.state;
|
|
|
5337 |
|
|
|
5338 |
if (!strm.output ||
|
|
|
5339 |
(!strm.input && strm.avail_in !== 0) ||
|
|
|
5340 |
(s.status === FINISH_STATE && flush !== Z_FINISH)) {
|
|
|
5341 |
return err(strm, (strm.avail_out === 0) ? Z_BUF_ERROR : Z_STREAM_ERROR);
|
|
|
5342 |
}
|
|
|
5343 |
|
|
|
5344 |
s.strm = strm; /* just in case */
|
|
|
5345 |
old_flush = s.last_flush;
|
|
|
5346 |
s.last_flush = flush;
|
|
|
5347 |
|
|
|
5348 |
/* Write the header */
|
|
|
5349 |
if (s.status === INIT_STATE) {
|
|
|
5350 |
|
|
|
5351 |
if (s.wrap === 2) { // GZIP header
|
|
|
5352 |
strm.adler = 0; //crc32(0L, Z_NULL, 0);
|
|
|
5353 |
put_byte(s, 31);
|
|
|
5354 |
put_byte(s, 139);
|
|
|
5355 |
put_byte(s, 8);
|
|
|
5356 |
if (!s.gzhead) { // s->gzhead == Z_NULL
|
|
|
5357 |
put_byte(s, 0);
|
|
|
5358 |
put_byte(s, 0);
|
|
|
5359 |
put_byte(s, 0);
|
|
|
5360 |
put_byte(s, 0);
|
|
|
5361 |
put_byte(s, 0);
|
|
|
5362 |
put_byte(s, s.level === 9 ? 2 :
|
|
|
5363 |
(s.strategy >= Z_HUFFMAN_ONLY || s.level < 2 ?
|
|
|
5364 |
4 : 0));
|
|
|
5365 |
put_byte(s, OS_CODE);
|
|
|
5366 |
s.status = BUSY_STATE;
|
|
|
5367 |
}
|
|
|
5368 |
else {
|
|
|
5369 |
put_byte(s, (s.gzhead.text ? 1 : 0) +
|
|
|
5370 |
(s.gzhead.hcrc ? 2 : 0) +
|
|
|
5371 |
(!s.gzhead.extra ? 0 : 4) +
|
|
|
5372 |
(!s.gzhead.name ? 0 : 8) +
|
|
|
5373 |
(!s.gzhead.comment ? 0 : 16)
|
|
|
5374 |
);
|
|
|
5375 |
put_byte(s, s.gzhead.time & 0xff);
|
|
|
5376 |
put_byte(s, (s.gzhead.time >> 8) & 0xff);
|
|
|
5377 |
put_byte(s, (s.gzhead.time >> 16) & 0xff);
|
|
|
5378 |
put_byte(s, (s.gzhead.time >> 24) & 0xff);
|
|
|
5379 |
put_byte(s, s.level === 9 ? 2 :
|
|
|
5380 |
(s.strategy >= Z_HUFFMAN_ONLY || s.level < 2 ?
|
|
|
5381 |
4 : 0));
|
|
|
5382 |
put_byte(s, s.gzhead.os & 0xff);
|
|
|
5383 |
if (s.gzhead.extra && s.gzhead.extra.length) {
|
|
|
5384 |
put_byte(s, s.gzhead.extra.length & 0xff);
|
|
|
5385 |
put_byte(s, (s.gzhead.extra.length >> 8) & 0xff);
|
|
|
5386 |
}
|
|
|
5387 |
if (s.gzhead.hcrc) {
|
|
|
5388 |
strm.adler = crc32(strm.adler, s.pending_buf, s.pending, 0);
|
|
|
5389 |
}
|
|
|
5390 |
s.gzindex = 0;
|
|
|
5391 |
s.status = EXTRA_STATE;
|
|
|
5392 |
}
|
|
|
5393 |
}
|
|
|
5394 |
else // DEFLATE header
|
|
|
5395 |
{
|
|
|
5396 |
var header = (Z_DEFLATED + ((s.w_bits - 8) << 4)) << 8;
|
|
|
5397 |
var level_flags = -1;
|
|
|
5398 |
|
|
|
5399 |
if (s.strategy >= Z_HUFFMAN_ONLY || s.level < 2) {
|
|
|
5400 |
level_flags = 0;
|
|
|
5401 |
} else if (s.level < 6) {
|
|
|
5402 |
level_flags = 1;
|
|
|
5403 |
} else if (s.level === 6) {
|
|
|
5404 |
level_flags = 2;
|
|
|
5405 |
} else {
|
|
|
5406 |
level_flags = 3;
|
|
|
5407 |
}
|
|
|
5408 |
header |= (level_flags << 6);
|
|
|
5409 |
if (s.strstart !== 0) { header |= PRESET_DICT; }
|
|
|
5410 |
header += 31 - (header % 31);
|
|
|
5411 |
|
|
|
5412 |
s.status = BUSY_STATE;
|
|
|
5413 |
putShortMSB(s, header);
|
|
|
5414 |
|
|
|
5415 |
/* Save the adler32 of the preset dictionary: */
|
|
|
5416 |
if (s.strstart !== 0) {
|
|
|
5417 |
putShortMSB(s, strm.adler >>> 16);
|
|
|
5418 |
putShortMSB(s, strm.adler & 0xffff);
|
|
|
5419 |
}
|
|
|
5420 |
strm.adler = 1; // adler32(0L, Z_NULL, 0);
|
|
|
5421 |
}
|
|
|
5422 |
}
|
|
|
5423 |
|
|
|
5424 |
//#ifdef GZIP
|
|
|
5425 |
if (s.status === EXTRA_STATE) {
|
|
|
5426 |
if (s.gzhead.extra/* != Z_NULL*/) {
|
|
|
5427 |
beg = s.pending; /* start of bytes to update crc */
|
|
|
5428 |
|
|
|
5429 |
while (s.gzindex < (s.gzhead.extra.length & 0xffff)) {
|
|
|
5430 |
if (s.pending === s.pending_buf_size) {
|
|
|
5431 |
if (s.gzhead.hcrc && s.pending > beg) {
|
|
|
5432 |
strm.adler = crc32(strm.adler, s.pending_buf, s.pending - beg, beg);
|
|
|
5433 |
}
|
|
|
5434 |
flush_pending(strm);
|
|
|
5435 |
beg = s.pending;
|
|
|
5436 |
if (s.pending === s.pending_buf_size) {
|
|
|
5437 |
break;
|
|
|
5438 |
}
|
|
|
5439 |
}
|
|
|
5440 |
put_byte(s, s.gzhead.extra[s.gzindex] & 0xff);
|
|
|
5441 |
s.gzindex++;
|
|
|
5442 |
}
|
|
|
5443 |
if (s.gzhead.hcrc && s.pending > beg) {
|
|
|
5444 |
strm.adler = crc32(strm.adler, s.pending_buf, s.pending - beg, beg);
|
|
|
5445 |
}
|
|
|
5446 |
if (s.gzindex === s.gzhead.extra.length) {
|
|
|
5447 |
s.gzindex = 0;
|
|
|
5448 |
s.status = NAME_STATE;
|
|
|
5449 |
}
|
|
|
5450 |
}
|
|
|
5451 |
else {
|
|
|
5452 |
s.status = NAME_STATE;
|
|
|
5453 |
}
|
|
|
5454 |
}
|
|
|
5455 |
if (s.status === NAME_STATE) {
|
|
|
5456 |
if (s.gzhead.name/* != Z_NULL*/) {
|
|
|
5457 |
beg = s.pending; /* start of bytes to update crc */
|
|
|
5458 |
//int val;
|
|
|
5459 |
|
|
|
5460 |
do {
|
|
|
5461 |
if (s.pending === s.pending_buf_size) {
|
|
|
5462 |
if (s.gzhead.hcrc && s.pending > beg) {
|
|
|
5463 |
strm.adler = crc32(strm.adler, s.pending_buf, s.pending - beg, beg);
|
|
|
5464 |
}
|
|
|
5465 |
flush_pending(strm);
|
|
|
5466 |
beg = s.pending;
|
|
|
5467 |
if (s.pending === s.pending_buf_size) {
|
|
|
5468 |
val = 1;
|
|
|
5469 |
break;
|
|
|
5470 |
}
|
|
|
5471 |
}
|
|
|
5472 |
// JS specific: little magic to add zero terminator to end of string
|
|
|
5473 |
if (s.gzindex < s.gzhead.name.length) {
|
|
|
5474 |
val = s.gzhead.name.charCodeAt(s.gzindex++) & 0xff;
|
|
|
5475 |
} else {
|
|
|
5476 |
val = 0;
|
|
|
5477 |
}
|
|
|
5478 |
put_byte(s, val);
|
|
|
5479 |
} while (val !== 0);
|
|
|
5480 |
|
|
|
5481 |
if (s.gzhead.hcrc && s.pending > beg){
|
|
|
5482 |
strm.adler = crc32(strm.adler, s.pending_buf, s.pending - beg, beg);
|
|
|
5483 |
}
|
|
|
5484 |
if (val === 0) {
|
|
|
5485 |
s.gzindex = 0;
|
|
|
5486 |
s.status = COMMENT_STATE;
|
|
|
5487 |
}
|
|
|
5488 |
}
|
|
|
5489 |
else {
|
|
|
5490 |
s.status = COMMENT_STATE;
|
|
|
5491 |
}
|
|
|
5492 |
}
|
|
|
5493 |
if (s.status === COMMENT_STATE) {
|
|
|
5494 |
if (s.gzhead.comment/* != Z_NULL*/) {
|
|
|
5495 |
beg = s.pending; /* start of bytes to update crc */
|
|
|
5496 |
//int val;
|
|
|
5497 |
|
|
|
5498 |
do {
|
|
|
5499 |
if (s.pending === s.pending_buf_size) {
|
|
|
5500 |
if (s.gzhead.hcrc && s.pending > beg) {
|
|
|
5501 |
strm.adler = crc32(strm.adler, s.pending_buf, s.pending - beg, beg);
|
|
|
5502 |
}
|
|
|
5503 |
flush_pending(strm);
|
|
|
5504 |
beg = s.pending;
|
|
|
5505 |
if (s.pending === s.pending_buf_size) {
|
|
|
5506 |
val = 1;
|
|
|
5507 |
break;
|
|
|
5508 |
}
|
|
|
5509 |
}
|
|
|
5510 |
// JS specific: little magic to add zero terminator to end of string
|
|
|
5511 |
if (s.gzindex < s.gzhead.comment.length) {
|
|
|
5512 |
val = s.gzhead.comment.charCodeAt(s.gzindex++) & 0xff;
|
|
|
5513 |
} else {
|
|
|
5514 |
val = 0;
|
|
|
5515 |
}
|
|
|
5516 |
put_byte(s, val);
|
|
|
5517 |
} while (val !== 0);
|
|
|
5518 |
|
|
|
5519 |
if (s.gzhead.hcrc && s.pending > beg) {
|
|
|
5520 |
strm.adler = crc32(strm.adler, s.pending_buf, s.pending - beg, beg);
|
|
|
5521 |
}
|
|
|
5522 |
if (val === 0) {
|
|
|
5523 |
s.status = HCRC_STATE;
|
|
|
5524 |
}
|
|
|
5525 |
}
|
|
|
5526 |
else {
|
|
|
5527 |
s.status = HCRC_STATE;
|
|
|
5528 |
}
|
|
|
5529 |
}
|
|
|
5530 |
if (s.status === HCRC_STATE) {
|
|
|
5531 |
if (s.gzhead.hcrc) {
|
|
|
5532 |
if (s.pending + 2 > s.pending_buf_size) {
|
|
|
5533 |
flush_pending(strm);
|
|
|
5534 |
}
|
|
|
5535 |
if (s.pending + 2 <= s.pending_buf_size) {
|
|
|
5536 |
put_byte(s, strm.adler & 0xff);
|
|
|
5537 |
put_byte(s, (strm.adler >> 8) & 0xff);
|
|
|
5538 |
strm.adler = 0; //crc32(0L, Z_NULL, 0);
|
|
|
5539 |
s.status = BUSY_STATE;
|
|
|
5540 |
}
|
|
|
5541 |
}
|
|
|
5542 |
else {
|
|
|
5543 |
s.status = BUSY_STATE;
|
|
|
5544 |
}
|
|
|
5545 |
}
|
|
|
5546 |
//#endif
|
|
|
5547 |
|
|
|
5548 |
/* Flush as much pending output as possible */
|
|
|
5549 |
if (s.pending !== 0) {
|
|
|
5550 |
flush_pending(strm);
|
|
|
5551 |
if (strm.avail_out === 0) {
|
|
|
5552 |
/* Since avail_out is 0, deflate will be called again with
|
|
|
5553 |
* more output space, but possibly with both pending and
|
|
|
5554 |
* avail_in equal to zero. There won't be anything to do,
|
|
|
5555 |
* but this is not an error situation so make sure we
|
|
|
5556 |
* return OK instead of BUF_ERROR at next call of deflate:
|
|
|
5557 |
*/
|
|
|
5558 |
s.last_flush = -1;
|
|
|
5559 |
return Z_OK;
|
|
|
5560 |
}
|
|
|
5561 |
|
|
|
5562 |
/* Make sure there is something to do and avoid duplicate consecutive
|
|
|
5563 |
* flushes. For repeated and useless calls with Z_FINISH, we keep
|
|
|
5564 |
* returning Z_STREAM_END instead of Z_BUF_ERROR.
|
|
|
5565 |
*/
|
|
|
5566 |
} else if (strm.avail_in === 0 && rank(flush) <= rank(old_flush) &&
|
|
|
5567 |
flush !== Z_FINISH) {
|
|
|
5568 |
return err(strm, Z_BUF_ERROR);
|
|
|
5569 |
}
|
|
|
5570 |
|
|
|
5571 |
/* User must not provide more input after the first FINISH: */
|
|
|
5572 |
if (s.status === FINISH_STATE && strm.avail_in !== 0) {
|
|
|
5573 |
return err(strm, Z_BUF_ERROR);
|
|
|
5574 |
}
|
|
|
5575 |
|
|
|
5576 |
/* Start a new block or continue the current one.
|
|
|
5577 |
*/
|
|
|
5578 |
if (strm.avail_in !== 0 || s.lookahead !== 0 ||
|
|
|
5579 |
(flush !== Z_NO_FLUSH && s.status !== FINISH_STATE)) {
|
|
|
5580 |
var bstate = (s.strategy === Z_HUFFMAN_ONLY) ? deflate_huff(s, flush) :
|
|
|
5581 |
(s.strategy === Z_RLE ? deflate_rle(s, flush) :
|
|
|
5582 |
configuration_table[s.level].func(s, flush));
|
|
|
5583 |
|
|
|
5584 |
if (bstate === BS_FINISH_STARTED || bstate === BS_FINISH_DONE) {
|
|
|
5585 |
s.status = FINISH_STATE;
|
|
|
5586 |
}
|
|
|
5587 |
if (bstate === BS_NEED_MORE || bstate === BS_FINISH_STARTED) {
|
|
|
5588 |
if (strm.avail_out === 0) {
|
|
|
5589 |
s.last_flush = -1;
|
|
|
5590 |
/* avoid BUF_ERROR next call, see above */
|
|
|
5591 |
}
|
|
|
5592 |
return Z_OK;
|
|
|
5593 |
/* If flush != Z_NO_FLUSH && avail_out == 0, the next call
|
|
|
5594 |
* of deflate should use the same flush parameter to make sure
|
|
|
5595 |
* that the flush is complete. So we don't have to output an
|
|
|
5596 |
* empty block here, this will be done at next call. This also
|
|
|
5597 |
* ensures that for a very small output buffer, we emit at most
|
|
|
5598 |
* one empty block.
|
|
|
5599 |
*/
|
|
|
5600 |
}
|
|
|
5601 |
if (bstate === BS_BLOCK_DONE) {
|
|
|
5602 |
if (flush === Z_PARTIAL_FLUSH) {
|
|
|
5603 |
trees._tr_align(s);
|
|
|
5604 |
}
|
|
|
5605 |
else if (flush !== Z_BLOCK) { /* FULL_FLUSH or SYNC_FLUSH */
|
|
|
5606 |
|
|
|
5607 |
trees._tr_stored_block(s, 0, 0, false);
|
|
|
5608 |
/* For a full flush, this empty block will be recognized
|
|
|
5609 |
* as a special marker by inflate_sync().
|
|
|
5610 |
*/
|
|
|
5611 |
if (flush === Z_FULL_FLUSH) {
|
|
|
5612 |
/*** CLEAR_HASH(s); ***/ /* forget history */
|
|
|
5613 |
zero(s.head); // Fill with NIL (= 0);
|
|
|
5614 |
|
|
|
5615 |
if (s.lookahead === 0) {
|
|
|
5616 |
s.strstart = 0;
|
|
|
5617 |
s.block_start = 0;
|
|
|
5618 |
s.insert = 0;
|
|
|
5619 |
}
|
|
|
5620 |
}
|
|
|
5621 |
}
|
|
|
5622 |
flush_pending(strm);
|
|
|
5623 |
if (strm.avail_out === 0) {
|
|
|
5624 |
s.last_flush = -1; /* avoid BUF_ERROR at next call, see above */
|
|
|
5625 |
return Z_OK;
|
|
|
5626 |
}
|
|
|
5627 |
}
|
|
|
5628 |
}
|
|
|
5629 |
//Assert(strm->avail_out > 0, "bug2");
|
|
|
5630 |
//if (strm.avail_out <= 0) { throw new Error("bug2");}
|
|
|
5631 |
|
|
|
5632 |
if (flush !== Z_FINISH) { return Z_OK; }
|
|
|
5633 |
if (s.wrap <= 0) { return Z_STREAM_END; }
|
|
|
5634 |
|
|
|
5635 |
/* Write the trailer */
|
|
|
5636 |
if (s.wrap === 2) {
|
|
|
5637 |
put_byte(s, strm.adler & 0xff);
|
|
|
5638 |
put_byte(s, (strm.adler >> 8) & 0xff);
|
|
|
5639 |
put_byte(s, (strm.adler >> 16) & 0xff);
|
|
|
5640 |
put_byte(s, (strm.adler >> 24) & 0xff);
|
|
|
5641 |
put_byte(s, strm.total_in & 0xff);
|
|
|
5642 |
put_byte(s, (strm.total_in >> 8) & 0xff);
|
|
|
5643 |
put_byte(s, (strm.total_in >> 16) & 0xff);
|
|
|
5644 |
put_byte(s, (strm.total_in >> 24) & 0xff);
|
|
|
5645 |
}
|
|
|
5646 |
else
|
|
|
5647 |
{
|
|
|
5648 |
putShortMSB(s, strm.adler >>> 16);
|
|
|
5649 |
putShortMSB(s, strm.adler & 0xffff);
|
|
|
5650 |
}
|
|
|
5651 |
|
|
|
5652 |
flush_pending(strm);
|
|
|
5653 |
/* If avail_out is zero, the application will call deflate again
|
|
|
5654 |
* to flush the rest.
|
|
|
5655 |
*/
|
|
|
5656 |
if (s.wrap > 0) { s.wrap = -s.wrap; }
|
|
|
5657 |
/* write the trailer only once! */
|
|
|
5658 |
return s.pending !== 0 ? Z_OK : Z_STREAM_END;
|
|
|
5659 |
}
|
|
|
5660 |
|
|
|
5661 |
function deflateEnd(strm) {
|
|
|
5662 |
var status;
|
|
|
5663 |
|
|
|
5664 |
if (!strm/*== Z_NULL*/ || !strm.state/*== Z_NULL*/) {
|
|
|
5665 |
return Z_STREAM_ERROR;
|
|
|
5666 |
}
|
|
|
5667 |
|
|
|
5668 |
status = strm.state.status;
|
|
|
5669 |
if (status !== INIT_STATE &&
|
|
|
5670 |
status !== EXTRA_STATE &&
|
|
|
5671 |
status !== NAME_STATE &&
|
|
|
5672 |
status !== COMMENT_STATE &&
|
|
|
5673 |
status !== HCRC_STATE &&
|
|
|
5674 |
status !== BUSY_STATE &&
|
|
|
5675 |
status !== FINISH_STATE
|
|
|
5676 |
) {
|
|
|
5677 |
return err(strm, Z_STREAM_ERROR);
|
|
|
5678 |
}
|
|
|
5679 |
|
|
|
5680 |
strm.state = null;
|
|
|
5681 |
|
|
|
5682 |
return status === BUSY_STATE ? err(strm, Z_DATA_ERROR) : Z_OK;
|
|
|
5683 |
}
|
|
|
5684 |
|
|
|
5685 |
/* =========================================================================
|
|
|
5686 |
* Copy the source state to the destination state
|
|
|
5687 |
*/
|
|
|
5688 |
//function deflateCopy(dest, source) {
|
|
|
5689 |
//
|
|
|
5690 |
//}
|
|
|
5691 |
|
|
|
5692 |
exports.deflateInit = deflateInit;
|
|
|
5693 |
exports.deflateInit2 = deflateInit2;
|
|
|
5694 |
exports.deflateReset = deflateReset;
|
|
|
5695 |
exports.deflateResetKeep = deflateResetKeep;
|
|
|
5696 |
exports.deflateSetHeader = deflateSetHeader;
|
|
|
5697 |
exports.deflate = deflate;
|
|
|
5698 |
exports.deflateEnd = deflateEnd;
|
|
|
5699 |
exports.deflateInfo = 'pako deflate (from Nodeca project)';
|
|
|
5700 |
|
|
|
5701 |
/* Not implemented
|
|
|
5702 |
exports.deflateBound = deflateBound;
|
|
|
5703 |
exports.deflateCopy = deflateCopy;
|
|
|
5704 |
exports.deflateSetDictionary = deflateSetDictionary;
|
|
|
5705 |
exports.deflateParams = deflateParams;
|
|
|
5706 |
exports.deflatePending = deflatePending;
|
|
|
5707 |
exports.deflatePrime = deflatePrime;
|
|
|
5708 |
exports.deflateTune = deflateTune;
|
|
|
5709 |
*/
|
|
|
5710 |
},{"../utils/common":27,"./adler32":29,"./crc32":31,"./messages":37,"./trees":38}],33:[function(_dereq_,module,exports){
|
|
|
5711 |
'use strict';
|
|
|
5712 |
|
|
|
5713 |
|
|
|
5714 |
function GZheader() {
|
|
|
5715 |
/* true if compressed data believed to be text */
|
|
|
5716 |
this.text = 0;
|
|
|
5717 |
/* modification time */
|
|
|
5718 |
this.time = 0;
|
|
|
5719 |
/* extra flags (not used when writing a gzip file) */
|
|
|
5720 |
this.xflags = 0;
|
|
|
5721 |
/* operating system */
|
|
|
5722 |
this.os = 0;
|
|
|
5723 |
/* pointer to extra field or Z_NULL if none */
|
|
|
5724 |
this.extra = null;
|
|
|
5725 |
/* extra field length (valid if extra != Z_NULL) */
|
|
|
5726 |
this.extra_len = 0; // Actually, we don't need it in JS,
|
|
|
5727 |
// but leave for few code modifications
|
|
|
5728 |
|
|
|
5729 |
//
|
|
|
5730 |
// Setup limits is not necessary because in js we should not preallocate memory
|
|
|
5731 |
// for inflate use constant limit in 65536 bytes
|
|
|
5732 |
//
|
|
|
5733 |
|
|
|
5734 |
/* space at extra (only when reading header) */
|
|
|
5735 |
// this.extra_max = 0;
|
|
|
5736 |
/* pointer to zero-terminated file name or Z_NULL */
|
|
|
5737 |
this.name = '';
|
|
|
5738 |
/* space at name (only when reading header) */
|
|
|
5739 |
// this.name_max = 0;
|
|
|
5740 |
/* pointer to zero-terminated comment or Z_NULL */
|
|
|
5741 |
this.comment = '';
|
|
|
5742 |
/* space at comment (only when reading header) */
|
|
|
5743 |
// this.comm_max = 0;
|
|
|
5744 |
/* true if there was or will be a header crc */
|
|
|
5745 |
this.hcrc = 0;
|
|
|
5746 |
/* true when done reading gzip header (not used when writing a gzip file) */
|
|
|
5747 |
this.done = false;
|
|
|
5748 |
}
|
|
|
5749 |
|
|
|
5750 |
module.exports = GZheader;
|
|
|
5751 |
},{}],34:[function(_dereq_,module,exports){
|
|
|
5752 |
'use strict';
|
|
|
5753 |
|
|
|
5754 |
// See state defs from inflate.js
|
|
|
5755 |
var BAD = 30; /* got a data error -- remain here until reset */
|
|
|
5756 |
var TYPE = 12; /* i: waiting for type bits, including last-flag bit */
|
|
|
5757 |
|
|
|
5758 |
/*
|
|
|
5759 |
Decode literal, length, and distance codes and write out the resulting
|
|
|
5760 |
literal and match bytes until either not enough input or output is
|
|
|
5761 |
available, an end-of-block is encountered, or a data error is encountered.
|
|
|
5762 |
When large enough input and output buffers are supplied to inflate(), for
|
|
|
5763 |
example, a 16K input buffer and a 64K output buffer, more than 95% of the
|
|
|
5764 |
inflate execution time is spent in this routine.
|
|
|
5765 |
|
|
|
5766 |
Entry assumptions:
|
|
|
5767 |
|
|
|
5768 |
state.mode === LEN
|
|
|
5769 |
strm.avail_in >= 6
|
|
|
5770 |
strm.avail_out >= 258
|
|
|
5771 |
start >= strm.avail_out
|
|
|
5772 |
state.bits < 8
|
|
|
5773 |
|
|
|
5774 |
On return, state.mode is one of:
|
|
|
5775 |
|
|
|
5776 |
LEN -- ran out of enough output space or enough available input
|
|
|
5777 |
TYPE -- reached end of block code, inflate() to interpret next block
|
|
|
5778 |
BAD -- error in block data
|
|
|
5779 |
|
|
|
5780 |
Notes:
|
|
|
5781 |
|
|
|
5782 |
- The maximum input bits used by a length/distance pair is 15 bits for the
|
|
|
5783 |
length code, 5 bits for the length extra, 15 bits for the distance code,
|
|
|
5784 |
and 13 bits for the distance extra. This totals 48 bits, or six bytes.
|
|
|
5785 |
Therefore if strm.avail_in >= 6, then there is enough input to avoid
|
|
|
5786 |
checking for available input while decoding.
|
|
|
5787 |
|
|
|
5788 |
- The maximum bytes that a single length/distance pair can output is 258
|
|
|
5789 |
bytes, which is the maximum length that can be coded. inflate_fast()
|
|
|
5790 |
requires strm.avail_out >= 258 for each loop to avoid checking for
|
|
|
5791 |
output space.
|
|
|
5792 |
*/
|
|
|
5793 |
module.exports = function inflate_fast(strm, start) {
|
|
|
5794 |
var state;
|
|
|
5795 |
var _in; /* local strm.input */
|
|
|
5796 |
var last; /* have enough input while in < last */
|
|
|
5797 |
var _out; /* local strm.output */
|
|
|
5798 |
var beg; /* inflate()'s initial strm.output */
|
|
|
5799 |
var end; /* while out < end, enough space available */
|
|
|
5800 |
//#ifdef INFLATE_STRICT
|
|
|
5801 |
var dmax; /* maximum distance from zlib header */
|
|
|
5802 |
//#endif
|
|
|
5803 |
var wsize; /* window size or zero if not using window */
|
|
|
5804 |
var whave; /* valid bytes in the window */
|
|
|
5805 |
var wnext; /* window write index */
|
|
|
5806 |
var window; /* allocated sliding window, if wsize != 0 */
|
|
|
5807 |
var hold; /* local strm.hold */
|
|
|
5808 |
var bits; /* local strm.bits */
|
|
|
5809 |
var lcode; /* local strm.lencode */
|
|
|
5810 |
var dcode; /* local strm.distcode */
|
|
|
5811 |
var lmask; /* mask for first level of length codes */
|
|
|
5812 |
var dmask; /* mask for first level of distance codes */
|
|
|
5813 |
var here; /* retrieved table entry */
|
|
|
5814 |
var op; /* code bits, operation, extra bits, or */
|
|
|
5815 |
/* window position, window bytes to copy */
|
|
|
5816 |
var len; /* match length, unused bytes */
|
|
|
5817 |
var dist; /* match distance */
|
|
|
5818 |
var from; /* where to copy match from */
|
|
|
5819 |
var from_source;
|
|
|
5820 |
|
|
|
5821 |
|
|
|
5822 |
var input, output; // JS specific, because we have no pointers
|
|
|
5823 |
|
|
|
5824 |
/* copy state to local variables */
|
|
|
5825 |
state = strm.state;
|
|
|
5826 |
//here = state.here;
|
|
|
5827 |
_in = strm.next_in;
|
|
|
5828 |
input = strm.input;
|
|
|
5829 |
last = _in + (strm.avail_in - 5);
|
|
|
5830 |
_out = strm.next_out;
|
|
|
5831 |
output = strm.output;
|
|
|
5832 |
beg = _out - (start - strm.avail_out);
|
|
|
5833 |
end = _out + (strm.avail_out - 257);
|
|
|
5834 |
//#ifdef INFLATE_STRICT
|
|
|
5835 |
dmax = state.dmax;
|
|
|
5836 |
//#endif
|
|
|
5837 |
wsize = state.wsize;
|
|
|
5838 |
whave = state.whave;
|
|
|
5839 |
wnext = state.wnext;
|
|
|
5840 |
window = state.window;
|
|
|
5841 |
hold = state.hold;
|
|
|
5842 |
bits = state.bits;
|
|
|
5843 |
lcode = state.lencode;
|
|
|
5844 |
dcode = state.distcode;
|
|
|
5845 |
lmask = (1 << state.lenbits) - 1;
|
|
|
5846 |
dmask = (1 << state.distbits) - 1;
|
|
|
5847 |
|
|
|
5848 |
|
|
|
5849 |
/* decode literals and length/distances until end-of-block or not enough
|
|
|
5850 |
input data or output space */
|
|
|
5851 |
|
|
|
5852 |
top:
|
|
|
5853 |
do {
|
|
|
5854 |
if (bits < 15) {
|
|
|
5855 |
hold += input[_in++] << bits;
|
|
|
5856 |
bits += 8;
|
|
|
5857 |
hold += input[_in++] << bits;
|
|
|
5858 |
bits += 8;
|
|
|
5859 |
}
|
|
|
5860 |
|
|
|
5861 |
here = lcode[hold & lmask];
|
|
|
5862 |
|
|
|
5863 |
dolen:
|
|
|
5864 |
for (;;) { // Goto emulation
|
|
|
5865 |
op = here >>> 24/*here.bits*/;
|
|
|
5866 |
hold >>>= op;
|
|
|
5867 |
bits -= op;
|
|
|
5868 |
op = (here >>> 16) & 0xff/*here.op*/;
|
|
|
5869 |
if (op === 0) { /* literal */
|
|
|
5870 |
//Tracevv((stderr, here.val >= 0x20 && here.val < 0x7f ?
|
|
|
5871 |
// "inflate: literal '%c'\n" :
|
|
|
5872 |
// "inflate: literal 0x%02x\n", here.val));
|
|
|
5873 |
output[_out++] = here & 0xffff/*here.val*/;
|
|
|
5874 |
}
|
|
|
5875 |
else if (op & 16) { /* length base */
|
|
|
5876 |
len = here & 0xffff/*here.val*/;
|
|
|
5877 |
op &= 15; /* number of extra bits */
|
|
|
5878 |
if (op) {
|
|
|
5879 |
if (bits < op) {
|
|
|
5880 |
hold += input[_in++] << bits;
|
|
|
5881 |
bits += 8;
|
|
|
5882 |
}
|
|
|
5883 |
len += hold & ((1 << op) - 1);
|
|
|
5884 |
hold >>>= op;
|
|
|
5885 |
bits -= op;
|
|
|
5886 |
}
|
|
|
5887 |
//Tracevv((stderr, "inflate: length %u\n", len));
|
|
|
5888 |
if (bits < 15) {
|
|
|
5889 |
hold += input[_in++] << bits;
|
|
|
5890 |
bits += 8;
|
|
|
5891 |
hold += input[_in++] << bits;
|
|
|
5892 |
bits += 8;
|
|
|
5893 |
}
|
|
|
5894 |
here = dcode[hold & dmask];
|
|
|
5895 |
|
|
|
5896 |
dodist:
|
|
|
5897 |
for (;;) { // goto emulation
|
|
|
5898 |
op = here >>> 24/*here.bits*/;
|
|
|
5899 |
hold >>>= op;
|
|
|
5900 |
bits -= op;
|
|
|
5901 |
op = (here >>> 16) & 0xff/*here.op*/;
|
|
|
5902 |
|
|
|
5903 |
if (op & 16) { /* distance base */
|
|
|
5904 |
dist = here & 0xffff/*here.val*/;
|
|
|
5905 |
op &= 15; /* number of extra bits */
|
|
|
5906 |
if (bits < op) {
|
|
|
5907 |
hold += input[_in++] << bits;
|
|
|
5908 |
bits += 8;
|
|
|
5909 |
if (bits < op) {
|
|
|
5910 |
hold += input[_in++] << bits;
|
|
|
5911 |
bits += 8;
|
|
|
5912 |
}
|
|
|
5913 |
}
|
|
|
5914 |
dist += hold & ((1 << op) - 1);
|
|
|
5915 |
//#ifdef INFLATE_STRICT
|
|
|
5916 |
if (dist > dmax) {
|
|
|
5917 |
strm.msg = 'invalid distance too far back';
|
|
|
5918 |
state.mode = BAD;
|
|
|
5919 |
break top;
|
|
|
5920 |
}
|
|
|
5921 |
//#endif
|
|
|
5922 |
hold >>>= op;
|
|
|
5923 |
bits -= op;
|
|
|
5924 |
//Tracevv((stderr, "inflate: distance %u\n", dist));
|
|
|
5925 |
op = _out - beg; /* max distance in output */
|
|
|
5926 |
if (dist > op) { /* see if copy from window */
|
|
|
5927 |
op = dist - op; /* distance back in window */
|
|
|
5928 |
if (op > whave) {
|
|
|
5929 |
if (state.sane) {
|
|
|
5930 |
strm.msg = 'invalid distance too far back';
|
|
|
5931 |
state.mode = BAD;
|
|
|
5932 |
break top;
|
|
|
5933 |
}
|
|
|
5934 |
|
|
|
5935 |
// (!) This block is disabled in zlib defailts,
|
|
|
5936 |
// don't enable it for binary compatibility
|
|
|
5937 |
//#ifdef INFLATE_ALLOW_INVALID_DISTANCE_TOOFAR_ARRR
|
|
|
5938 |
// if (len <= op - whave) {
|
|
|
5939 |
// do {
|
|
|
5940 |
// output[_out++] = 0;
|
|
|
5941 |
// } while (--len);
|
|
|
5942 |
// continue top;
|
|
|
5943 |
// }
|
|
|
5944 |
// len -= op - whave;
|
|
|
5945 |
// do {
|
|
|
5946 |
// output[_out++] = 0;
|
|
|
5947 |
// } while (--op > whave);
|
|
|
5948 |
// if (op === 0) {
|
|
|
5949 |
// from = _out - dist;
|
|
|
5950 |
// do {
|
|
|
5951 |
// output[_out++] = output[from++];
|
|
|
5952 |
// } while (--len);
|
|
|
5953 |
// continue top;
|
|
|
5954 |
// }
|
|
|
5955 |
//#endif
|
|
|
5956 |
}
|
|
|
5957 |
from = 0; // window index
|
|
|
5958 |
from_source = window;
|
|
|
5959 |
if (wnext === 0) { /* very common case */
|
|
|
5960 |
from += wsize - op;
|
|
|
5961 |
if (op < len) { /* some from window */
|
|
|
5962 |
len -= op;
|
|
|
5963 |
do {
|
|
|
5964 |
output[_out++] = window[from++];
|
|
|
5965 |
} while (--op);
|
|
|
5966 |
from = _out - dist; /* rest from output */
|
|
|
5967 |
from_source = output;
|
|
|
5968 |
}
|
|
|
5969 |
}
|
|
|
5970 |
else if (wnext < op) { /* wrap around window */
|
|
|
5971 |
from += wsize + wnext - op;
|
|
|
5972 |
op -= wnext;
|
|
|
5973 |
if (op < len) { /* some from end of window */
|
|
|
5974 |
len -= op;
|
|
|
5975 |
do {
|
|
|
5976 |
output[_out++] = window[from++];
|
|
|
5977 |
} while (--op);
|
|
|
5978 |
from = 0;
|
|
|
5979 |
if (wnext < len) { /* some from start of window */
|
|
|
5980 |
op = wnext;
|
|
|
5981 |
len -= op;
|
|
|
5982 |
do {
|
|
|
5983 |
output[_out++] = window[from++];
|
|
|
5984 |
} while (--op);
|
|
|
5985 |
from = _out - dist; /* rest from output */
|
|
|
5986 |
from_source = output;
|
|
|
5987 |
}
|
|
|
5988 |
}
|
|
|
5989 |
}
|
|
|
5990 |
else { /* contiguous in window */
|
|
|
5991 |
from += wnext - op;
|
|
|
5992 |
if (op < len) { /* some from window */
|
|
|
5993 |
len -= op;
|
|
|
5994 |
do {
|
|
|
5995 |
output[_out++] = window[from++];
|
|
|
5996 |
} while (--op);
|
|
|
5997 |
from = _out - dist; /* rest from output */
|
|
|
5998 |
from_source = output;
|
|
|
5999 |
}
|
|
|
6000 |
}
|
|
|
6001 |
while (len > 2) {
|
|
|
6002 |
output[_out++] = from_source[from++];
|
|
|
6003 |
output[_out++] = from_source[from++];
|
|
|
6004 |
output[_out++] = from_source[from++];
|
|
|
6005 |
len -= 3;
|
|
|
6006 |
}
|
|
|
6007 |
if (len) {
|
|
|
6008 |
output[_out++] = from_source[from++];
|
|
|
6009 |
if (len > 1) {
|
|
|
6010 |
output[_out++] = from_source[from++];
|
|
|
6011 |
}
|
|
|
6012 |
}
|
|
|
6013 |
}
|
|
|
6014 |
else {
|
|
|
6015 |
from = _out - dist; /* copy direct from output */
|
|
|
6016 |
do { /* minimum length is three */
|
|
|
6017 |
output[_out++] = output[from++];
|
|
|
6018 |
output[_out++] = output[from++];
|
|
|
6019 |
output[_out++] = output[from++];
|
|
|
6020 |
len -= 3;
|
|
|
6021 |
} while (len > 2);
|
|
|
6022 |
if (len) {
|
|
|
6023 |
output[_out++] = output[from++];
|
|
|
6024 |
if (len > 1) {
|
|
|
6025 |
output[_out++] = output[from++];
|
|
|
6026 |
}
|
|
|
6027 |
}
|
|
|
6028 |
}
|
|
|
6029 |
}
|
|
|
6030 |
else if ((op & 64) === 0) { /* 2nd level distance code */
|
|
|
6031 |
here = dcode[(here & 0xffff)/*here.val*/ + (hold & ((1 << op) - 1))];
|
|
|
6032 |
continue dodist;
|
|
|
6033 |
}
|
|
|
6034 |
else {
|
|
|
6035 |
strm.msg = 'invalid distance code';
|
|
|
6036 |
state.mode = BAD;
|
|
|
6037 |
break top;
|
|
|
6038 |
}
|
|
|
6039 |
|
|
|
6040 |
break; // need to emulate goto via "continue"
|
|
|
6041 |
}
|
|
|
6042 |
}
|
|
|
6043 |
else if ((op & 64) === 0) { /* 2nd level length code */
|
|
|
6044 |
here = lcode[(here & 0xffff)/*here.val*/ + (hold & ((1 << op) - 1))];
|
|
|
6045 |
continue dolen;
|
|
|
6046 |
}
|
|
|
6047 |
else if (op & 32) { /* end-of-block */
|
|
|
6048 |
//Tracevv((stderr, "inflate: end of block\n"));
|
|
|
6049 |
state.mode = TYPE;
|
|
|
6050 |
break top;
|
|
|
6051 |
}
|
|
|
6052 |
else {
|
|
|
6053 |
strm.msg = 'invalid literal/length code';
|
|
|
6054 |
state.mode = BAD;
|
|
|
6055 |
break top;
|
|
|
6056 |
}
|
|
|
6057 |
|
|
|
6058 |
break; // need to emulate goto via "continue"
|
|
|
6059 |
}
|
|
|
6060 |
} while (_in < last && _out < end);
|
|
|
6061 |
|
|
|
6062 |
/* return unused bytes (on entry, bits < 8, so in won't go too far back) */
|
|
|
6063 |
len = bits >> 3;
|
|
|
6064 |
_in -= len;
|
|
|
6065 |
bits -= len << 3;
|
|
|
6066 |
hold &= (1 << bits) - 1;
|
|
|
6067 |
|
|
|
6068 |
/* update state and return */
|
|
|
6069 |
strm.next_in = _in;
|
|
|
6070 |
strm.next_out = _out;
|
|
|
6071 |
strm.avail_in = (_in < last ? 5 + (last - _in) : 5 - (_in - last));
|
|
|
6072 |
strm.avail_out = (_out < end ? 257 + (end - _out) : 257 - (_out - end));
|
|
|
6073 |
state.hold = hold;
|
|
|
6074 |
state.bits = bits;
|
|
|
6075 |
return;
|
|
|
6076 |
};
|
|
|
6077 |
|
|
|
6078 |
},{}],35:[function(_dereq_,module,exports){
|
|
|
6079 |
'use strict';
|
|
|
6080 |
|
|
|
6081 |
|
|
|
6082 |
var utils = _dereq_('../utils/common');
|
|
|
6083 |
var adler32 = _dereq_('./adler32');
|
|
|
6084 |
var crc32 = _dereq_('./crc32');
|
|
|
6085 |
var inflate_fast = _dereq_('./inffast');
|
|
|
6086 |
var inflate_table = _dereq_('./inftrees');
|
|
|
6087 |
|
|
|
6088 |
var CODES = 0;
|
|
|
6089 |
var LENS = 1;
|
|
|
6090 |
var DISTS = 2;
|
|
|
6091 |
|
|
|
6092 |
/* Public constants ==========================================================*/
|
|
|
6093 |
/* ===========================================================================*/
|
|
|
6094 |
|
|
|
6095 |
|
|
|
6096 |
/* Allowed flush values; see deflate() and inflate() below for details */
|
|
|
6097 |
//var Z_NO_FLUSH = 0;
|
|
|
6098 |
//var Z_PARTIAL_FLUSH = 1;
|
|
|
6099 |
//var Z_SYNC_FLUSH = 2;
|
|
|
6100 |
//var Z_FULL_FLUSH = 3;
|
|
|
6101 |
var Z_FINISH = 4;
|
|
|
6102 |
var Z_BLOCK = 5;
|
|
|
6103 |
var Z_TREES = 6;
|
|
|
6104 |
|
|
|
6105 |
|
|
|
6106 |
/* Return codes for the compression/decompression functions. Negative values
|
|
|
6107 |
* are errors, positive values are used for special but normal events.
|
|
|
6108 |
*/
|
|
|
6109 |
var Z_OK = 0;
|
|
|
6110 |
var Z_STREAM_END = 1;
|
|
|
6111 |
var Z_NEED_DICT = 2;
|
|
|
6112 |
//var Z_ERRNO = -1;
|
|
|
6113 |
var Z_STREAM_ERROR = -2;
|
|
|
6114 |
var Z_DATA_ERROR = -3;
|
|
|
6115 |
var Z_MEM_ERROR = -4;
|
|
|
6116 |
var Z_BUF_ERROR = -5;
|
|
|
6117 |
//var Z_VERSION_ERROR = -6;
|
|
|
6118 |
|
|
|
6119 |
/* The deflate compression method */
|
|
|
6120 |
var Z_DEFLATED = 8;
|
|
|
6121 |
|
|
|
6122 |
|
|
|
6123 |
/* STATES ====================================================================*/
|
|
|
6124 |
/* ===========================================================================*/
|
|
|
6125 |
|
|
|
6126 |
|
|
|
6127 |
var HEAD = 1; /* i: waiting for magic header */
|
|
|
6128 |
var FLAGS = 2; /* i: waiting for method and flags (gzip) */
|
|
|
6129 |
var TIME = 3; /* i: waiting for modification time (gzip) */
|
|
|
6130 |
var OS = 4; /* i: waiting for extra flags and operating system (gzip) */
|
|
|
6131 |
var EXLEN = 5; /* i: waiting for extra length (gzip) */
|
|
|
6132 |
var EXTRA = 6; /* i: waiting for extra bytes (gzip) */
|
|
|
6133 |
var NAME = 7; /* i: waiting for end of file name (gzip) */
|
|
|
6134 |
var COMMENT = 8; /* i: waiting for end of comment (gzip) */
|
|
|
6135 |
var HCRC = 9; /* i: waiting for header crc (gzip) */
|
|
|
6136 |
var DICTID = 10; /* i: waiting for dictionary check value */
|
|
|
6137 |
var DICT = 11; /* waiting for inflateSetDictionary() call */
|
|
|
6138 |
var TYPE = 12; /* i: waiting for type bits, including last-flag bit */
|
|
|
6139 |
var TYPEDO = 13; /* i: same, but skip check to exit inflate on new block */
|
|
|
6140 |
var STORED = 14; /* i: waiting for stored size (length and complement) */
|
|
|
6141 |
var COPY_ = 15; /* i/o: same as COPY below, but only first time in */
|
|
|
6142 |
var COPY = 16; /* i/o: waiting for input or output to copy stored block */
|
|
|
6143 |
var TABLE = 17; /* i: waiting for dynamic block table lengths */
|
|
|
6144 |
var LENLENS = 18; /* i: waiting for code length code lengths */
|
|
|
6145 |
var CODELENS = 19; /* i: waiting for length/lit and distance code lengths */
|
|
|
6146 |
var LEN_ = 20; /* i: same as LEN below, but only first time in */
|
|
|
6147 |
var LEN = 21; /* i: waiting for length/lit/eob code */
|
|
|
6148 |
var LENEXT = 22; /* i: waiting for length extra bits */
|
|
|
6149 |
var DIST = 23; /* i: waiting for distance code */
|
|
|
6150 |
var DISTEXT = 24; /* i: waiting for distance extra bits */
|
|
|
6151 |
var MATCH = 25; /* o: waiting for output space to copy string */
|
|
|
6152 |
var LIT = 26; /* o: waiting for output space to write literal */
|
|
|
6153 |
var CHECK = 27; /* i: waiting for 32-bit check value */
|
|
|
6154 |
var LENGTH = 28; /* i: waiting for 32-bit length (gzip) */
|
|
|
6155 |
var DONE = 29; /* finished check, done -- remain here until reset */
|
|
|
6156 |
var BAD = 30; /* got a data error -- remain here until reset */
|
|
|
6157 |
var MEM = 31; /* got an inflate() memory error -- remain here until reset */
|
|
|
6158 |
var SYNC = 32; /* looking for synchronization bytes to restart inflate() */
|
|
|
6159 |
|
|
|
6160 |
/* ===========================================================================*/
|
|
|
6161 |
|
|
|
6162 |
|
|
|
6163 |
|
|
|
6164 |
var ENOUGH_LENS = 852;
|
|
|
6165 |
var ENOUGH_DISTS = 592;
|
|
|
6166 |
//var ENOUGH = (ENOUGH_LENS+ENOUGH_DISTS);
|
|
|
6167 |
|
|
|
6168 |
var MAX_WBITS = 15;
|
|
|
6169 |
/* 32K LZ77 window */
|
|
|
6170 |
var DEF_WBITS = MAX_WBITS;
|
|
|
6171 |
|
|
|
6172 |
|
|
|
6173 |
function ZSWAP32(q) {
|
|
|
6174 |
return (((q >>> 24) & 0xff) +
|
|
|
6175 |
((q >>> 8) & 0xff00) +
|
|
|
6176 |
((q & 0xff00) << 8) +
|
|
|
6177 |
((q & 0xff) << 24));
|
|
|
6178 |
}
|
|
|
6179 |
|
|
|
6180 |
|
|
|
6181 |
function InflateState() {
|
|
|
6182 |
this.mode = 0; /* current inflate mode */
|
|
|
6183 |
this.last = false; /* true if processing last block */
|
|
|
6184 |
this.wrap = 0; /* bit 0 true for zlib, bit 1 true for gzip */
|
|
|
6185 |
this.havedict = false; /* true if dictionary provided */
|
|
|
6186 |
this.flags = 0; /* gzip header method and flags (0 if zlib) */
|
|
|
6187 |
this.dmax = 0; /* zlib header max distance (INFLATE_STRICT) */
|
|
|
6188 |
this.check = 0; /* protected copy of check value */
|
|
|
6189 |
this.total = 0; /* protected copy of output count */
|
|
|
6190 |
// TODO: may be {}
|
|
|
6191 |
this.head = null; /* where to save gzip header information */
|
|
|
6192 |
|
|
|
6193 |
/* sliding window */
|
|
|
6194 |
this.wbits = 0; /* log base 2 of requested window size */
|
|
|
6195 |
this.wsize = 0; /* window size or zero if not using window */
|
|
|
6196 |
this.whave = 0; /* valid bytes in the window */
|
|
|
6197 |
this.wnext = 0; /* window write index */
|
|
|
6198 |
this.window = null; /* allocated sliding window, if needed */
|
|
|
6199 |
|
|
|
6200 |
/* bit accumulator */
|
|
|
6201 |
this.hold = 0; /* input bit accumulator */
|
|
|
6202 |
this.bits = 0; /* number of bits in "in" */
|
|
|
6203 |
|
|
|
6204 |
/* for string and stored block copying */
|
|
|
6205 |
this.length = 0; /* literal or length of data to copy */
|
|
|
6206 |
this.offset = 0; /* distance back to copy string from */
|
|
|
6207 |
|
|
|
6208 |
/* for table and code decoding */
|
|
|
6209 |
this.extra = 0; /* extra bits needed */
|
|
|
6210 |
|
|
|
6211 |
/* fixed and dynamic code tables */
|
|
|
6212 |
this.lencode = null; /* starting table for length/literal codes */
|
|
|
6213 |
this.distcode = null; /* starting table for distance codes */
|
|
|
6214 |
this.lenbits = 0; /* index bits for lencode */
|
|
|
6215 |
this.distbits = 0; /* index bits for distcode */
|
|
|
6216 |
|
|
|
6217 |
/* dynamic table building */
|
|
|
6218 |
this.ncode = 0; /* number of code length code lengths */
|
|
|
6219 |
this.nlen = 0; /* number of length code lengths */
|
|
|
6220 |
this.ndist = 0; /* number of distance code lengths */
|
|
|
6221 |
this.have = 0; /* number of code lengths in lens[] */
|
|
|
6222 |
this.next = null; /* next available space in codes[] */
|
|
|
6223 |
|
|
|
6224 |
this.lens = new utils.Buf16(320); /* temporary storage for code lengths */
|
|
|
6225 |
this.work = new utils.Buf16(288); /* work area for code table building */
|
|
|
6226 |
|
|
|
6227 |
/*
|
|
|
6228 |
because we don't have pointers in js, we use lencode and distcode directly
|
|
|
6229 |
as buffers so we don't need codes
|
|
|
6230 |
*/
|
|
|
6231 |
//this.codes = new utils.Buf32(ENOUGH); /* space for code tables */
|
|
|
6232 |
this.lendyn = null; /* dynamic table for length/literal codes (JS specific) */
|
|
|
6233 |
this.distdyn = null; /* dynamic table for distance codes (JS specific) */
|
|
|
6234 |
this.sane = 0; /* if false, allow invalid distance too far */
|
|
|
6235 |
this.back = 0; /* bits back of last unprocessed length/lit */
|
|
|
6236 |
this.was = 0; /* initial length of match */
|
|
|
6237 |
}
|
|
|
6238 |
|
|
|
6239 |
function inflateResetKeep(strm) {
|
|
|
6240 |
var state;
|
|
|
6241 |
|
|
|
6242 |
if (!strm || !strm.state) { return Z_STREAM_ERROR; }
|
|
|
6243 |
state = strm.state;
|
|
|
6244 |
strm.total_in = strm.total_out = state.total = 0;
|
|
|
6245 |
strm.msg = ''; /*Z_NULL*/
|
|
|
6246 |
if (state.wrap) { /* to support ill-conceived Java test suite */
|
|
|
6247 |
strm.adler = state.wrap & 1;
|
|
|
6248 |
}
|
|
|
6249 |
state.mode = HEAD;
|
|
|
6250 |
state.last = 0;
|
|
|
6251 |
state.havedict = 0;
|
|
|
6252 |
state.dmax = 32768;
|
|
|
6253 |
state.head = null/*Z_NULL*/;
|
|
|
6254 |
state.hold = 0;
|
|
|
6255 |
state.bits = 0;
|
|
|
6256 |
//state.lencode = state.distcode = state.next = state.codes;
|
|
|
6257 |
state.lencode = state.lendyn = new utils.Buf32(ENOUGH_LENS);
|
|
|
6258 |
state.distcode = state.distdyn = new utils.Buf32(ENOUGH_DISTS);
|
|
|
6259 |
|
|
|
6260 |
state.sane = 1;
|
|
|
6261 |
state.back = -1;
|
|
|
6262 |
//Tracev((stderr, "inflate: reset\n"));
|
|
|
6263 |
return Z_OK;
|
|
|
6264 |
}
|
|
|
6265 |
|
|
|
6266 |
function inflateReset(strm) {
|
|
|
6267 |
var state;
|
|
|
6268 |
|
|
|
6269 |
if (!strm || !strm.state) { return Z_STREAM_ERROR; }
|
|
|
6270 |
state = strm.state;
|
|
|
6271 |
state.wsize = 0;
|
|
|
6272 |
state.whave = 0;
|
|
|
6273 |
state.wnext = 0;
|
|
|
6274 |
return inflateResetKeep(strm);
|
|
|
6275 |
|
|
|
6276 |
}
|
|
|
6277 |
|
|
|
6278 |
function inflateReset2(strm, windowBits) {
|
|
|
6279 |
var wrap;
|
|
|
6280 |
var state;
|
|
|
6281 |
|
|
|
6282 |
/* get the state */
|
|
|
6283 |
if (!strm || !strm.state) { return Z_STREAM_ERROR; }
|
|
|
6284 |
state = strm.state;
|
|
|
6285 |
|
|
|
6286 |
/* extract wrap request from windowBits parameter */
|
|
|
6287 |
if (windowBits < 0) {
|
|
|
6288 |
wrap = 0;
|
|
|
6289 |
windowBits = -windowBits;
|
|
|
6290 |
}
|
|
|
6291 |
else {
|
|
|
6292 |
wrap = (windowBits >> 4) + 1;
|
|
|
6293 |
if (windowBits < 48) {
|
|
|
6294 |
windowBits &= 15;
|
|
|
6295 |
}
|
|
|
6296 |
}
|
|
|
6297 |
|
|
|
6298 |
/* set number of window bits, free window if different */
|
|
|
6299 |
if (windowBits && (windowBits < 8 || windowBits > 15)) {
|
|
|
6300 |
return Z_STREAM_ERROR;
|
|
|
6301 |
}
|
|
|
6302 |
if (state.window !== null && state.wbits !== windowBits) {
|
|
|
6303 |
state.window = null;
|
|
|
6304 |
}
|
|
|
6305 |
|
|
|
6306 |
/* update state and reset the rest of it */
|
|
|
6307 |
state.wrap = wrap;
|
|
|
6308 |
state.wbits = windowBits;
|
|
|
6309 |
return inflateReset(strm);
|
|
|
6310 |
}
|
|
|
6311 |
|
|
|
6312 |
function inflateInit2(strm, windowBits) {
|
|
|
6313 |
var ret;
|
|
|
6314 |
var state;
|
|
|
6315 |
|
|
|
6316 |
if (!strm) { return Z_STREAM_ERROR; }
|
|
|
6317 |
//strm.msg = Z_NULL; /* in case we return an error */
|
|
|
6318 |
|
|
|
6319 |
state = new InflateState();
|
|
|
6320 |
|
|
|
6321 |
//if (state === Z_NULL) return Z_MEM_ERROR;
|
|
|
6322 |
//Tracev((stderr, "inflate: allocated\n"));
|
|
|
6323 |
strm.state = state;
|
|
|
6324 |
state.window = null/*Z_NULL*/;
|
|
|
6325 |
ret = inflateReset2(strm, windowBits);
|
|
|
6326 |
if (ret !== Z_OK) {
|
|
|
6327 |
strm.state = null/*Z_NULL*/;
|
|
|
6328 |
}
|
|
|
6329 |
return ret;
|
|
|
6330 |
}
|
|
|
6331 |
|
|
|
6332 |
function inflateInit(strm) {
|
|
|
6333 |
return inflateInit2(strm, DEF_WBITS);
|
|
|
6334 |
}
|
|
|
6335 |
|
|
|
6336 |
|
|
|
6337 |
/*
|
|
|
6338 |
Return state with length and distance decoding tables and index sizes set to
|
|
|
6339 |
fixed code decoding. Normally this returns fixed tables from inffixed.h.
|
|
|
6340 |
If BUILDFIXED is defined, then instead this routine builds the tables the
|
|
|
6341 |
first time it's called, and returns those tables the first time and
|
|
|
6342 |
thereafter. This reduces the size of the code by about 2K bytes, in
|
|
|
6343 |
exchange for a little execution time. However, BUILDFIXED should not be
|
|
|
6344 |
used for threaded applications, since the rewriting of the tables and virgin
|
|
|
6345 |
may not be thread-safe.
|
|
|
6346 |
*/
|
|
|
6347 |
var virgin = true;
|
|
|
6348 |
|
|
|
6349 |
var lenfix, distfix; // We have no pointers in JS, so keep tables separate
|
|
|
6350 |
|
|
|
6351 |
function fixedtables(state) {
|
|
|
6352 |
/* build fixed huffman tables if first call (may not be thread safe) */
|
|
|
6353 |
if (virgin) {
|
|
|
6354 |
var sym;
|
|
|
6355 |
|
|
|
6356 |
lenfix = new utils.Buf32(512);
|
|
|
6357 |
distfix = new utils.Buf32(32);
|
|
|
6358 |
|
|
|
6359 |
/* literal/length table */
|
|
|
6360 |
sym = 0;
|
|
|
6361 |
while (sym < 144) { state.lens[sym++] = 8; }
|
|
|
6362 |
while (sym < 256) { state.lens[sym++] = 9; }
|
|
|
6363 |
while (sym < 280) { state.lens[sym++] = 7; }
|
|
|
6364 |
while (sym < 288) { state.lens[sym++] = 8; }
|
|
|
6365 |
|
|
|
6366 |
inflate_table(LENS, state.lens, 0, 288, lenfix, 0, state.work, {bits: 9});
|
|
|
6367 |
|
|
|
6368 |
/* distance table */
|
|
|
6369 |
sym = 0;
|
|
|
6370 |
while (sym < 32) { state.lens[sym++] = 5; }
|
|
|
6371 |
|
|
|
6372 |
inflate_table(DISTS, state.lens, 0, 32, distfix, 0, state.work, {bits: 5});
|
|
|
6373 |
|
|
|
6374 |
/* do this just once */
|
|
|
6375 |
virgin = false;
|
|
|
6376 |
}
|
|
|
6377 |
|
|
|
6378 |
state.lencode = lenfix;
|
|
|
6379 |
state.lenbits = 9;
|
|
|
6380 |
state.distcode = distfix;
|
|
|
6381 |
state.distbits = 5;
|
|
|
6382 |
}
|
|
|
6383 |
|
|
|
6384 |
|
|
|
6385 |
/*
|
|
|
6386 |
Update the window with the last wsize (normally 32K) bytes written before
|
|
|
6387 |
returning. If window does not exist yet, create it. This is only called
|
|
|
6388 |
when a window is already in use, or when output has been written during this
|
|
|
6389 |
inflate call, but the end of the deflate stream has not been reached yet.
|
|
|
6390 |
It is also called to create a window for dictionary data when a dictionary
|
|
|
6391 |
is loaded.
|
|
|
6392 |
|
|
|
6393 |
Providing output buffers larger than 32K to inflate() should provide a speed
|
|
|
6394 |
advantage, since only the last 32K of output is copied to the sliding window
|
|
|
6395 |
upon return from inflate(), and since all distances after the first 32K of
|
|
|
6396 |
output will fall in the output data, making match copies simpler and faster.
|
|
|
6397 |
The advantage may be dependent on the size of the processor's data caches.
|
|
|
6398 |
*/
|
|
|
6399 |
function updatewindow(strm, src, end, copy) {
|
|
|
6400 |
var dist;
|
|
|
6401 |
var state = strm.state;
|
|
|
6402 |
|
|
|
6403 |
/* if it hasn't been done already, allocate space for the window */
|
|
|
6404 |
if (state.window === null) {
|
|
|
6405 |
state.wsize = 1 << state.wbits;
|
|
|
6406 |
state.wnext = 0;
|
|
|
6407 |
state.whave = 0;
|
|
|
6408 |
|
|
|
6409 |
state.window = new utils.Buf8(state.wsize);
|
|
|
6410 |
}
|
|
|
6411 |
|
|
|
6412 |
/* copy state->wsize or less output bytes into the circular window */
|
|
|
6413 |
if (copy >= state.wsize) {
|
|
|
6414 |
utils.arraySet(state.window,src, end - state.wsize, state.wsize, 0);
|
|
|
6415 |
state.wnext = 0;
|
|
|
6416 |
state.whave = state.wsize;
|
|
|
6417 |
}
|
|
|
6418 |
else {
|
|
|
6419 |
dist = state.wsize - state.wnext;
|
|
|
6420 |
if (dist > copy) {
|
|
|
6421 |
dist = copy;
|
|
|
6422 |
}
|
|
|
6423 |
//zmemcpy(state->window + state->wnext, end - copy, dist);
|
|
|
6424 |
utils.arraySet(state.window,src, end - copy, dist, state.wnext);
|
|
|
6425 |
copy -= dist;
|
|
|
6426 |
if (copy) {
|
|
|
6427 |
//zmemcpy(state->window, end - copy, copy);
|
|
|
6428 |
utils.arraySet(state.window,src, end - copy, copy, 0);
|
|
|
6429 |
state.wnext = copy;
|
|
|
6430 |
state.whave = state.wsize;
|
|
|
6431 |
}
|
|
|
6432 |
else {
|
|
|
6433 |
state.wnext += dist;
|
|
|
6434 |
if (state.wnext === state.wsize) { state.wnext = 0; }
|
|
|
6435 |
if (state.whave < state.wsize) { state.whave += dist; }
|
|
|
6436 |
}
|
|
|
6437 |
}
|
|
|
6438 |
return 0;
|
|
|
6439 |
}
|
|
|
6440 |
|
|
|
6441 |
function inflate(strm, flush) {
|
|
|
6442 |
var state;
|
|
|
6443 |
var input, output; // input/output buffers
|
|
|
6444 |
var next; /* next input INDEX */
|
|
|
6445 |
var put; /* next output INDEX */
|
|
|
6446 |
var have, left; /* available input and output */
|
|
|
6447 |
var hold; /* bit buffer */
|
|
|
6448 |
var bits; /* bits in bit buffer */
|
|
|
6449 |
var _in, _out; /* save starting available input and output */
|
|
|
6450 |
var copy; /* number of stored or match bytes to copy */
|
|
|
6451 |
var from; /* where to copy match bytes from */
|
|
|
6452 |
var from_source;
|
|
|
6453 |
var here = 0; /* current decoding table entry */
|
|
|
6454 |
var here_bits, here_op, here_val; // paked "here" denormalized (JS specific)
|
|
|
6455 |
//var last; /* parent table entry */
|
|
|
6456 |
var last_bits, last_op, last_val; // paked "last" denormalized (JS specific)
|
|
|
6457 |
var len; /* length to copy for repeats, bits to drop */
|
|
|
6458 |
var ret; /* return code */
|
|
|
6459 |
var hbuf = new utils.Buf8(4); /* buffer for gzip header crc calculation */
|
|
|
6460 |
var opts;
|
|
|
6461 |
|
|
|
6462 |
var n; // temporary var for NEED_BITS
|
|
|
6463 |
|
|
|
6464 |
var order = /* permutation of code lengths */
|
|
|
6465 |
[16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15];
|
|
|
6466 |
|
|
|
6467 |
|
|
|
6468 |
if (!strm || !strm.state || !strm.output ||
|
|
|
6469 |
(!strm.input && strm.avail_in !== 0)) {
|
|
|
6470 |
return Z_STREAM_ERROR;
|
|
|
6471 |
}
|
|
|
6472 |
|
|
|
6473 |
state = strm.state;
|
|
|
6474 |
if (state.mode === TYPE) { state.mode = TYPEDO; } /* skip check */
|
|
|
6475 |
|
|
|
6476 |
|
|
|
6477 |
//--- LOAD() ---
|
|
|
6478 |
put = strm.next_out;
|
|
|
6479 |
output = strm.output;
|
|
|
6480 |
left = strm.avail_out;
|
|
|
6481 |
next = strm.next_in;
|
|
|
6482 |
input = strm.input;
|
|
|
6483 |
have = strm.avail_in;
|
|
|
6484 |
hold = state.hold;
|
|
|
6485 |
bits = state.bits;
|
|
|
6486 |
//---
|
|
|
6487 |
|
|
|
6488 |
_in = have;
|
|
|
6489 |
_out = left;
|
|
|
6490 |
ret = Z_OK;
|
|
|
6491 |
|
|
|
6492 |
inf_leave: // goto emulation
|
|
|
6493 |
for (;;) {
|
|
|
6494 |
switch (state.mode) {
|
|
|
6495 |
case HEAD:
|
|
|
6496 |
if (state.wrap === 0) {
|
|
|
6497 |
state.mode = TYPEDO;
|
|
|
6498 |
break;
|
|
|
6499 |
}
|
|
|
6500 |
//=== NEEDBITS(16);
|
|
|
6501 |
while (bits < 16) {
|
|
|
6502 |
if (have === 0) { break inf_leave; }
|
|
|
6503 |
have--;
|
|
|
6504 |
hold += input[next++] << bits;
|
|
|
6505 |
bits += 8;
|
|
|
6506 |
}
|
|
|
6507 |
//===//
|
|
|
6508 |
if ((state.wrap & 2) && hold === 0x8b1f) { /* gzip header */
|
|
|
6509 |
state.check = 0/*crc32(0L, Z_NULL, 0)*/;
|
|
|
6510 |
//=== CRC2(state.check, hold);
|
|
|
6511 |
hbuf[0] = hold & 0xff;
|
|
|
6512 |
hbuf[1] = (hold >>> 8) & 0xff;
|
|
|
6513 |
state.check = crc32(state.check, hbuf, 2, 0);
|
|
|
6514 |
//===//
|
|
|
6515 |
|
|
|
6516 |
//=== INITBITS();
|
|
|
6517 |
hold = 0;
|
|
|
6518 |
bits = 0;
|
|
|
6519 |
//===//
|
|
|
6520 |
state.mode = FLAGS;
|
|
|
6521 |
break;
|
|
|
6522 |
}
|
|
|
6523 |
state.flags = 0; /* expect zlib header */
|
|
|
6524 |
if (state.head) {
|
|
|
6525 |
state.head.done = false;
|
|
|
6526 |
}
|
|
|
6527 |
if (!(state.wrap & 1) || /* check if zlib header allowed */
|
|
|
6528 |
(((hold & 0xff)/*BITS(8)*/ << 8) + (hold >> 8)) % 31) {
|
|
|
6529 |
strm.msg = 'incorrect header check';
|
|
|
6530 |
state.mode = BAD;
|
|
|
6531 |
break;
|
|
|
6532 |
}
|
|
|
6533 |
if ((hold & 0x0f)/*BITS(4)*/ !== Z_DEFLATED) {
|
|
|
6534 |
strm.msg = 'unknown compression method';
|
|
|
6535 |
state.mode = BAD;
|
|
|
6536 |
break;
|
|
|
6537 |
}
|
|
|
6538 |
//--- DROPBITS(4) ---//
|
|
|
6539 |
hold >>>= 4;
|
|
|
6540 |
bits -= 4;
|
|
|
6541 |
//---//
|
|
|
6542 |
len = (hold & 0x0f)/*BITS(4)*/ + 8;
|
|
|
6543 |
if (state.wbits === 0) {
|
|
|
6544 |
state.wbits = len;
|
|
|
6545 |
}
|
|
|
6546 |
else if (len > state.wbits) {
|
|
|
6547 |
strm.msg = 'invalid window size';
|
|
|
6548 |
state.mode = BAD;
|
|
|
6549 |
break;
|
|
|
6550 |
}
|
|
|
6551 |
state.dmax = 1 << len;
|
|
|
6552 |
//Tracev((stderr, "inflate: zlib header ok\n"));
|
|
|
6553 |
strm.adler = state.check = 1/*adler32(0L, Z_NULL, 0)*/;
|
|
|
6554 |
state.mode = hold & 0x200 ? DICTID : TYPE;
|
|
|
6555 |
//=== INITBITS();
|
|
|
6556 |
hold = 0;
|
|
|
6557 |
bits = 0;
|
|
|
6558 |
//===//
|
|
|
6559 |
break;
|
|
|
6560 |
case FLAGS:
|
|
|
6561 |
//=== NEEDBITS(16); */
|
|
|
6562 |
while (bits < 16) {
|
|
|
6563 |
if (have === 0) { break inf_leave; }
|
|
|
6564 |
have--;
|
|
|
6565 |
hold += input[next++] << bits;
|
|
|
6566 |
bits += 8;
|
|
|
6567 |
}
|
|
|
6568 |
//===//
|
|
|
6569 |
state.flags = hold;
|
|
|
6570 |
if ((state.flags & 0xff) !== Z_DEFLATED) {
|
|
|
6571 |
strm.msg = 'unknown compression method';
|
|
|
6572 |
state.mode = BAD;
|
|
|
6573 |
break;
|
|
|
6574 |
}
|
|
|
6575 |
if (state.flags & 0xe000) {
|
|
|
6576 |
strm.msg = 'unknown header flags set';
|
|
|
6577 |
state.mode = BAD;
|
|
|
6578 |
break;
|
|
|
6579 |
}
|
|
|
6580 |
if (state.head) {
|
|
|
6581 |
state.head.text = ((hold >> 8) & 1);
|
|
|
6582 |
}
|
|
|
6583 |
if (state.flags & 0x0200) {
|
|
|
6584 |
//=== CRC2(state.check, hold);
|
|
|
6585 |
hbuf[0] = hold & 0xff;
|
|
|
6586 |
hbuf[1] = (hold >>> 8) & 0xff;
|
|
|
6587 |
state.check = crc32(state.check, hbuf, 2, 0);
|
|
|
6588 |
//===//
|
|
|
6589 |
}
|
|
|
6590 |
//=== INITBITS();
|
|
|
6591 |
hold = 0;
|
|
|
6592 |
bits = 0;
|
|
|
6593 |
//===//
|
|
|
6594 |
state.mode = TIME;
|
|
|
6595 |
/* falls through */
|
|
|
6596 |
case TIME:
|
|
|
6597 |
//=== NEEDBITS(32); */
|
|
|
6598 |
while (bits < 32) {
|
|
|
6599 |
if (have === 0) { break inf_leave; }
|
|
|
6600 |
have--;
|
|
|
6601 |
hold += input[next++] << bits;
|
|
|
6602 |
bits += 8;
|
|
|
6603 |
}
|
|
|
6604 |
//===//
|
|
|
6605 |
if (state.head) {
|
|
|
6606 |
state.head.time = hold;
|
|
|
6607 |
}
|
|
|
6608 |
if (state.flags & 0x0200) {
|
|
|
6609 |
//=== CRC4(state.check, hold)
|
|
|
6610 |
hbuf[0] = hold & 0xff;
|
|
|
6611 |
hbuf[1] = (hold >>> 8) & 0xff;
|
|
|
6612 |
hbuf[2] = (hold >>> 16) & 0xff;
|
|
|
6613 |
hbuf[3] = (hold >>> 24) & 0xff;
|
|
|
6614 |
state.check = crc32(state.check, hbuf, 4, 0);
|
|
|
6615 |
//===
|
|
|
6616 |
}
|
|
|
6617 |
//=== INITBITS();
|
|
|
6618 |
hold = 0;
|
|
|
6619 |
bits = 0;
|
|
|
6620 |
//===//
|
|
|
6621 |
state.mode = OS;
|
|
|
6622 |
/* falls through */
|
|
|
6623 |
case OS:
|
|
|
6624 |
//=== NEEDBITS(16); */
|
|
|
6625 |
while (bits < 16) {
|
|
|
6626 |
if (have === 0) { break inf_leave; }
|
|
|
6627 |
have--;
|
|
|
6628 |
hold += input[next++] << bits;
|
|
|
6629 |
bits += 8;
|
|
|
6630 |
}
|
|
|
6631 |
//===//
|
|
|
6632 |
if (state.head) {
|
|
|
6633 |
state.head.xflags = (hold & 0xff);
|
|
|
6634 |
state.head.os = (hold >> 8);
|
|
|
6635 |
}
|
|
|
6636 |
if (state.flags & 0x0200) {
|
|
|
6637 |
//=== CRC2(state.check, hold);
|
|
|
6638 |
hbuf[0] = hold & 0xff;
|
|
|
6639 |
hbuf[1] = (hold >>> 8) & 0xff;
|
|
|
6640 |
state.check = crc32(state.check, hbuf, 2, 0);
|
|
|
6641 |
//===//
|
|
|
6642 |
}
|
|
|
6643 |
//=== INITBITS();
|
|
|
6644 |
hold = 0;
|
|
|
6645 |
bits = 0;
|
|
|
6646 |
//===//
|
|
|
6647 |
state.mode = EXLEN;
|
|
|
6648 |
/* falls through */
|
|
|
6649 |
case EXLEN:
|
|
|
6650 |
if (state.flags & 0x0400) {
|
|
|
6651 |
//=== NEEDBITS(16); */
|
|
|
6652 |
while (bits < 16) {
|
|
|
6653 |
if (have === 0) { break inf_leave; }
|
|
|
6654 |
have--;
|
|
|
6655 |
hold += input[next++] << bits;
|
|
|
6656 |
bits += 8;
|
|
|
6657 |
}
|
|
|
6658 |
//===//
|
|
|
6659 |
state.length = hold;
|
|
|
6660 |
if (state.head) {
|
|
|
6661 |
state.head.extra_len = hold;
|
|
|
6662 |
}
|
|
|
6663 |
if (state.flags & 0x0200) {
|
|
|
6664 |
//=== CRC2(state.check, hold);
|
|
|
6665 |
hbuf[0] = hold & 0xff;
|
|
|
6666 |
hbuf[1] = (hold >>> 8) & 0xff;
|
|
|
6667 |
state.check = crc32(state.check, hbuf, 2, 0);
|
|
|
6668 |
//===//
|
|
|
6669 |
}
|
|
|
6670 |
//=== INITBITS();
|
|
|
6671 |
hold = 0;
|
|
|
6672 |
bits = 0;
|
|
|
6673 |
//===//
|
|
|
6674 |
}
|
|
|
6675 |
else if (state.head) {
|
|
|
6676 |
state.head.extra = null/*Z_NULL*/;
|
|
|
6677 |
}
|
|
|
6678 |
state.mode = EXTRA;
|
|
|
6679 |
/* falls through */
|
|
|
6680 |
case EXTRA:
|
|
|
6681 |
if (state.flags & 0x0400) {
|
|
|
6682 |
copy = state.length;
|
|
|
6683 |
if (copy > have) { copy = have; }
|
|
|
6684 |
if (copy) {
|
|
|
6685 |
if (state.head) {
|
|
|
6686 |
len = state.head.extra_len - state.length;
|
|
|
6687 |
if (!state.head.extra) {
|
|
|
6688 |
// Use untyped array for more conveniend processing later
|
|
|
6689 |
state.head.extra = new Array(state.head.extra_len);
|
|
|
6690 |
}
|
|
|
6691 |
utils.arraySet(
|
|
|
6692 |
state.head.extra,
|
|
|
6693 |
input,
|
|
|
6694 |
next,
|
|
|
6695 |
// extra field is limited to 65536 bytes
|
|
|
6696 |
// - no need for additional size check
|
|
|
6697 |
copy,
|
|
|
6698 |
/*len + copy > state.head.extra_max - len ? state.head.extra_max : copy,*/
|
|
|
6699 |
len
|
|
|
6700 |
);
|
|
|
6701 |
//zmemcpy(state.head.extra + len, next,
|
|
|
6702 |
// len + copy > state.head.extra_max ?
|
|
|
6703 |
// state.head.extra_max - len : copy);
|
|
|
6704 |
}
|
|
|
6705 |
if (state.flags & 0x0200) {
|
|
|
6706 |
state.check = crc32(state.check, input, copy, next);
|
|
|
6707 |
}
|
|
|
6708 |
have -= copy;
|
|
|
6709 |
next += copy;
|
|
|
6710 |
state.length -= copy;
|
|
|
6711 |
}
|
|
|
6712 |
if (state.length) { break inf_leave; }
|
|
|
6713 |
}
|
|
|
6714 |
state.length = 0;
|
|
|
6715 |
state.mode = NAME;
|
|
|
6716 |
/* falls through */
|
|
|
6717 |
case NAME:
|
|
|
6718 |
if (state.flags & 0x0800) {
|
|
|
6719 |
if (have === 0) { break inf_leave; }
|
|
|
6720 |
copy = 0;
|
|
|
6721 |
do {
|
|
|
6722 |
// TODO: 2 or 1 bytes?
|
|
|
6723 |
len = input[next + copy++];
|
|
|
6724 |
/* use constant limit because in js we should not preallocate memory */
|
|
|
6725 |
if (state.head && len &&
|
|
|
6726 |
(state.length < 65536 /*state.head.name_max*/)) {
|
|
|
6727 |
state.head.name += String.fromCharCode(len);
|
|
|
6728 |
}
|
|
|
6729 |
} while (len && copy < have);
|
|
|
6730 |
|
|
|
6731 |
if (state.flags & 0x0200) {
|
|
|
6732 |
state.check = crc32(state.check, input, copy, next);
|
|
|
6733 |
}
|
|
|
6734 |
have -= copy;
|
|
|
6735 |
next += copy;
|
|
|
6736 |
if (len) { break inf_leave; }
|
|
|
6737 |
}
|
|
|
6738 |
else if (state.head) {
|
|
|
6739 |
state.head.name = null;
|
|
|
6740 |
}
|
|
|
6741 |
state.length = 0;
|
|
|
6742 |
state.mode = COMMENT;
|
|
|
6743 |
/* falls through */
|
|
|
6744 |
case COMMENT:
|
|
|
6745 |
if (state.flags & 0x1000) {
|
|
|
6746 |
if (have === 0) { break inf_leave; }
|
|
|
6747 |
copy = 0;
|
|
|
6748 |
do {
|
|
|
6749 |
len = input[next + copy++];
|
|
|
6750 |
/* use constant limit because in js we should not preallocate memory */
|
|
|
6751 |
if (state.head && len &&
|
|
|
6752 |
(state.length < 65536 /*state.head.comm_max*/)) {
|
|
|
6753 |
state.head.comment += String.fromCharCode(len);
|
|
|
6754 |
}
|
|
|
6755 |
} while (len && copy < have);
|
|
|
6756 |
if (state.flags & 0x0200) {
|
|
|
6757 |
state.check = crc32(state.check, input, copy, next);
|
|
|
6758 |
}
|
|
|
6759 |
have -= copy;
|
|
|
6760 |
next += copy;
|
|
|
6761 |
if (len) { break inf_leave; }
|
|
|
6762 |
}
|
|
|
6763 |
else if (state.head) {
|
|
|
6764 |
state.head.comment = null;
|
|
|
6765 |
}
|
|
|
6766 |
state.mode = HCRC;
|
|
|
6767 |
/* falls through */
|
|
|
6768 |
case HCRC:
|
|
|
6769 |
if (state.flags & 0x0200) {
|
|
|
6770 |
//=== NEEDBITS(16); */
|
|
|
6771 |
while (bits < 16) {
|
|
|
6772 |
if (have === 0) { break inf_leave; }
|
|
|
6773 |
have--;
|
|
|
6774 |
hold += input[next++] << bits;
|
|
|
6775 |
bits += 8;
|
|
|
6776 |
}
|
|
|
6777 |
//===//
|
|
|
6778 |
if (hold !== (state.check & 0xffff)) {
|
|
|
6779 |
strm.msg = 'header crc mismatch';
|
|
|
6780 |
state.mode = BAD;
|
|
|
6781 |
break;
|
|
|
6782 |
}
|
|
|
6783 |
//=== INITBITS();
|
|
|
6784 |
hold = 0;
|
|
|
6785 |
bits = 0;
|
|
|
6786 |
//===//
|
|
|
6787 |
}
|
|
|
6788 |
if (state.head) {
|
|
|
6789 |
state.head.hcrc = ((state.flags >> 9) & 1);
|
|
|
6790 |
state.head.done = true;
|
|
|
6791 |
}
|
|
|
6792 |
strm.adler = state.check = 0 /*crc32(0L, Z_NULL, 0)*/;
|
|
|
6793 |
state.mode = TYPE;
|
|
|
6794 |
break;
|
|
|
6795 |
case DICTID:
|
|
|
6796 |
//=== NEEDBITS(32); */
|
|
|
6797 |
while (bits < 32) {
|
|
|
6798 |
if (have === 0) { break inf_leave; }
|
|
|
6799 |
have--;
|
|
|
6800 |
hold += input[next++] << bits;
|
|
|
6801 |
bits += 8;
|
|
|
6802 |
}
|
|
|
6803 |
//===//
|
|
|
6804 |
strm.adler = state.check = ZSWAP32(hold);
|
|
|
6805 |
//=== INITBITS();
|
|
|
6806 |
hold = 0;
|
|
|
6807 |
bits = 0;
|
|
|
6808 |
//===//
|
|
|
6809 |
state.mode = DICT;
|
|
|
6810 |
/* falls through */
|
|
|
6811 |
case DICT:
|
|
|
6812 |
if (state.havedict === 0) {
|
|
|
6813 |
//--- RESTORE() ---
|
|
|
6814 |
strm.next_out = put;
|
|
|
6815 |
strm.avail_out = left;
|
|
|
6816 |
strm.next_in = next;
|
|
|
6817 |
strm.avail_in = have;
|
|
|
6818 |
state.hold = hold;
|
|
|
6819 |
state.bits = bits;
|
|
|
6820 |
//---
|
|
|
6821 |
return Z_NEED_DICT;
|
|
|
6822 |
}
|
|
|
6823 |
strm.adler = state.check = 1/*adler32(0L, Z_NULL, 0)*/;
|
|
|
6824 |
state.mode = TYPE;
|
|
|
6825 |
/* falls through */
|
|
|
6826 |
case TYPE:
|
|
|
6827 |
if (flush === Z_BLOCK || flush === Z_TREES) { break inf_leave; }
|
|
|
6828 |
/* falls through */
|
|
|
6829 |
case TYPEDO:
|
|
|
6830 |
if (state.last) {
|
|
|
6831 |
//--- BYTEBITS() ---//
|
|
|
6832 |
hold >>>= bits & 7;
|
|
|
6833 |
bits -= bits & 7;
|
|
|
6834 |
//---//
|
|
|
6835 |
state.mode = CHECK;
|
|
|
6836 |
break;
|
|
|
6837 |
}
|
|
|
6838 |
//=== NEEDBITS(3); */
|
|
|
6839 |
while (bits < 3) {
|
|
|
6840 |
if (have === 0) { break inf_leave; }
|
|
|
6841 |
have--;
|
|
|
6842 |
hold += input[next++] << bits;
|
|
|
6843 |
bits += 8;
|
|
|
6844 |
}
|
|
|
6845 |
//===//
|
|
|
6846 |
state.last = (hold & 0x01)/*BITS(1)*/;
|
|
|
6847 |
//--- DROPBITS(1) ---//
|
|
|
6848 |
hold >>>= 1;
|
|
|
6849 |
bits -= 1;
|
|
|
6850 |
//---//
|
|
|
6851 |
|
|
|
6852 |
switch ((hold & 0x03)/*BITS(2)*/) {
|
|
|
6853 |
case 0: /* stored block */
|
|
|
6854 |
//Tracev((stderr, "inflate: stored block%s\n",
|
|
|
6855 |
// state.last ? " (last)" : ""));
|
|
|
6856 |
state.mode = STORED;
|
|
|
6857 |
break;
|
|
|
6858 |
case 1: /* fixed block */
|
|
|
6859 |
fixedtables(state);
|
|
|
6860 |
//Tracev((stderr, "inflate: fixed codes block%s\n",
|
|
|
6861 |
// state.last ? " (last)" : ""));
|
|
|
6862 |
state.mode = LEN_; /* decode codes */
|
|
|
6863 |
if (flush === Z_TREES) {
|
|
|
6864 |
//--- DROPBITS(2) ---//
|
|
|
6865 |
hold >>>= 2;
|
|
|
6866 |
bits -= 2;
|
|
|
6867 |
//---//
|
|
|
6868 |
break inf_leave;
|
|
|
6869 |
}
|
|
|
6870 |
break;
|
|
|
6871 |
case 2: /* dynamic block */
|
|
|
6872 |
//Tracev((stderr, "inflate: dynamic codes block%s\n",
|
|
|
6873 |
// state.last ? " (last)" : ""));
|
|
|
6874 |
state.mode = TABLE;
|
|
|
6875 |
break;
|
|
|
6876 |
case 3:
|
|
|
6877 |
strm.msg = 'invalid block type';
|
|
|
6878 |
state.mode = BAD;
|
|
|
6879 |
}
|
|
|
6880 |
//--- DROPBITS(2) ---//
|
|
|
6881 |
hold >>>= 2;
|
|
|
6882 |
bits -= 2;
|
|
|
6883 |
//---//
|
|
|
6884 |
break;
|
|
|
6885 |
case STORED:
|
|
|
6886 |
//--- BYTEBITS() ---// /* go to byte boundary */
|
|
|
6887 |
hold >>>= bits & 7;
|
|
|
6888 |
bits -= bits & 7;
|
|
|
6889 |
//---//
|
|
|
6890 |
//=== NEEDBITS(32); */
|
|
|
6891 |
while (bits < 32) {
|
|
|
6892 |
if (have === 0) { break inf_leave; }
|
|
|
6893 |
have--;
|
|
|
6894 |
hold += input[next++] << bits;
|
|
|
6895 |
bits += 8;
|
|
|
6896 |
}
|
|
|
6897 |
//===//
|
|
|
6898 |
if ((hold & 0xffff) !== ((hold >>> 16) ^ 0xffff)) {
|
|
|
6899 |
strm.msg = 'invalid stored block lengths';
|
|
|
6900 |
state.mode = BAD;
|
|
|
6901 |
break;
|
|
|
6902 |
}
|
|
|
6903 |
state.length = hold & 0xffff;
|
|
|
6904 |
//Tracev((stderr, "inflate: stored length %u\n",
|
|
|
6905 |
// state.length));
|
|
|
6906 |
//=== INITBITS();
|
|
|
6907 |
hold = 0;
|
|
|
6908 |
bits = 0;
|
|
|
6909 |
//===//
|
|
|
6910 |
state.mode = COPY_;
|
|
|
6911 |
if (flush === Z_TREES) { break inf_leave; }
|
|
|
6912 |
/* falls through */
|
|
|
6913 |
case COPY_:
|
|
|
6914 |
state.mode = COPY;
|
|
|
6915 |
/* falls through */
|
|
|
6916 |
case COPY:
|
|
|
6917 |
copy = state.length;
|
|
|
6918 |
if (copy) {
|
|
|
6919 |
if (copy > have) { copy = have; }
|
|
|
6920 |
if (copy > left) { copy = left; }
|
|
|
6921 |
if (copy === 0) { break inf_leave; }
|
|
|
6922 |
//--- zmemcpy(put, next, copy); ---
|
|
|
6923 |
utils.arraySet(output, input, next, copy, put);
|
|
|
6924 |
//---//
|
|
|
6925 |
have -= copy;
|
|
|
6926 |
next += copy;
|
|
|
6927 |
left -= copy;
|
|
|
6928 |
put += copy;
|
|
|
6929 |
state.length -= copy;
|
|
|
6930 |
break;
|
|
|
6931 |
}
|
|
|
6932 |
//Tracev((stderr, "inflate: stored end\n"));
|
|
|
6933 |
state.mode = TYPE;
|
|
|
6934 |
break;
|
|
|
6935 |
case TABLE:
|
|
|
6936 |
//=== NEEDBITS(14); */
|
|
|
6937 |
while (bits < 14) {
|
|
|
6938 |
if (have === 0) { break inf_leave; }
|
|
|
6939 |
have--;
|
|
|
6940 |
hold += input[next++] << bits;
|
|
|
6941 |
bits += 8;
|
|
|
6942 |
}
|
|
|
6943 |
//===//
|
|
|
6944 |
state.nlen = (hold & 0x1f)/*BITS(5)*/ + 257;
|
|
|
6945 |
//--- DROPBITS(5) ---//
|
|
|
6946 |
hold >>>= 5;
|
|
|
6947 |
bits -= 5;
|
|
|
6948 |
//---//
|
|
|
6949 |
state.ndist = (hold & 0x1f)/*BITS(5)*/ + 1;
|
|
|
6950 |
//--- DROPBITS(5) ---//
|
|
|
6951 |
hold >>>= 5;
|
|
|
6952 |
bits -= 5;
|
|
|
6953 |
//---//
|
|
|
6954 |
state.ncode = (hold & 0x0f)/*BITS(4)*/ + 4;
|
|
|
6955 |
//--- DROPBITS(4) ---//
|
|
|
6956 |
hold >>>= 4;
|
|
|
6957 |
bits -= 4;
|
|
|
6958 |
//---//
|
|
|
6959 |
//#ifndef PKZIP_BUG_WORKAROUND
|
|
|
6960 |
if (state.nlen > 286 || state.ndist > 30) {
|
|
|
6961 |
strm.msg = 'too many length or distance symbols';
|
|
|
6962 |
state.mode = BAD;
|
|
|
6963 |
break;
|
|
|
6964 |
}
|
|
|
6965 |
//#endif
|
|
|
6966 |
//Tracev((stderr, "inflate: table sizes ok\n"));
|
|
|
6967 |
state.have = 0;
|
|
|
6968 |
state.mode = LENLENS;
|
|
|
6969 |
/* falls through */
|
|
|
6970 |
case LENLENS:
|
|
|
6971 |
while (state.have < state.ncode) {
|
|
|
6972 |
//=== NEEDBITS(3);
|
|
|
6973 |
while (bits < 3) {
|
|
|
6974 |
if (have === 0) { break inf_leave; }
|
|
|
6975 |
have--;
|
|
|
6976 |
hold += input[next++] << bits;
|
|
|
6977 |
bits += 8;
|
|
|
6978 |
}
|
|
|
6979 |
//===//
|
|
|
6980 |
state.lens[order[state.have++]] = (hold & 0x07);//BITS(3);
|
|
|
6981 |
//--- DROPBITS(3) ---//
|
|
|
6982 |
hold >>>= 3;
|
|
|
6983 |
bits -= 3;
|
|
|
6984 |
//---//
|
|
|
6985 |
}
|
|
|
6986 |
while (state.have < 19) {
|
|
|
6987 |
state.lens[order[state.have++]] = 0;
|
|
|
6988 |
}
|
|
|
6989 |
// We have separate tables & no pointers. 2 commented lines below not needed.
|
|
|
6990 |
//state.next = state.codes;
|
|
|
6991 |
//state.lencode = state.next;
|
|
|
6992 |
// Switch to use dynamic table
|
|
|
6993 |
state.lencode = state.lendyn;
|
|
|
6994 |
state.lenbits = 7;
|
|
|
6995 |
|
|
|
6996 |
opts = {bits: state.lenbits};
|
|
|
6997 |
ret = inflate_table(CODES, state.lens, 0, 19, state.lencode, 0, state.work, opts);
|
|
|
6998 |
state.lenbits = opts.bits;
|
|
|
6999 |
|
|
|
7000 |
if (ret) {
|
|
|
7001 |
strm.msg = 'invalid code lengths set';
|
|
|
7002 |
state.mode = BAD;
|
|
|
7003 |
break;
|
|
|
7004 |
}
|
|
|
7005 |
//Tracev((stderr, "inflate: code lengths ok\n"));
|
|
|
7006 |
state.have = 0;
|
|
|
7007 |
state.mode = CODELENS;
|
|
|
7008 |
/* falls through */
|
|
|
7009 |
case CODELENS:
|
|
|
7010 |
while (state.have < state.nlen + state.ndist) {
|
|
|
7011 |
for (;;) {
|
|
|
7012 |
here = state.lencode[hold & ((1 << state.lenbits) - 1)];/*BITS(state.lenbits)*/
|
|
|
7013 |
here_bits = here >>> 24;
|
|
|
7014 |
here_op = (here >>> 16) & 0xff;
|
|
|
7015 |
here_val = here & 0xffff;
|
|
|
7016 |
|
|
|
7017 |
if ((here_bits) <= bits) { break; }
|
|
|
7018 |
//--- PULLBYTE() ---//
|
|
|
7019 |
if (have === 0) { break inf_leave; }
|
|
|
7020 |
have--;
|
|
|
7021 |
hold += input[next++] << bits;
|
|
|
7022 |
bits += 8;
|
|
|
7023 |
//---//
|
|
|
7024 |
}
|
|
|
7025 |
if (here_val < 16) {
|
|
|
7026 |
//--- DROPBITS(here.bits) ---//
|
|
|
7027 |
hold >>>= here_bits;
|
|
|
7028 |
bits -= here_bits;
|
|
|
7029 |
//---//
|
|
|
7030 |
state.lens[state.have++] = here_val;
|
|
|
7031 |
}
|
|
|
7032 |
else {
|
|
|
7033 |
if (here_val === 16) {
|
|
|
7034 |
//=== NEEDBITS(here.bits + 2);
|
|
|
7035 |
n = here_bits + 2;
|
|
|
7036 |
while (bits < n) {
|
|
|
7037 |
if (have === 0) { break inf_leave; }
|
|
|
7038 |
have--;
|
|
|
7039 |
hold += input[next++] << bits;
|
|
|
7040 |
bits += 8;
|
|
|
7041 |
}
|
|
|
7042 |
//===//
|
|
|
7043 |
//--- DROPBITS(here.bits) ---//
|
|
|
7044 |
hold >>>= here_bits;
|
|
|
7045 |
bits -= here_bits;
|
|
|
7046 |
//---//
|
|
|
7047 |
if (state.have === 0) {
|
|
|
7048 |
strm.msg = 'invalid bit length repeat';
|
|
|
7049 |
state.mode = BAD;
|
|
|
7050 |
break;
|
|
|
7051 |
}
|
|
|
7052 |
len = state.lens[state.have - 1];
|
|
|
7053 |
copy = 3 + (hold & 0x03);//BITS(2);
|
|
|
7054 |
//--- DROPBITS(2) ---//
|
|
|
7055 |
hold >>>= 2;
|
|
|
7056 |
bits -= 2;
|
|
|
7057 |
//---//
|
|
|
7058 |
}
|
|
|
7059 |
else if (here_val === 17) {
|
|
|
7060 |
//=== NEEDBITS(here.bits + 3);
|
|
|
7061 |
n = here_bits + 3;
|
|
|
7062 |
while (bits < n) {
|
|
|
7063 |
if (have === 0) { break inf_leave; }
|
|
|
7064 |
have--;
|
|
|
7065 |
hold += input[next++] << bits;
|
|
|
7066 |
bits += 8;
|
|
|
7067 |
}
|
|
|
7068 |
//===//
|
|
|
7069 |
//--- DROPBITS(here.bits) ---//
|
|
|
7070 |
hold >>>= here_bits;
|
|
|
7071 |
bits -= here_bits;
|
|
|
7072 |
//---//
|
|
|
7073 |
len = 0;
|
|
|
7074 |
copy = 3 + (hold & 0x07);//BITS(3);
|
|
|
7075 |
//--- DROPBITS(3) ---//
|
|
|
7076 |
hold >>>= 3;
|
|
|
7077 |
bits -= 3;
|
|
|
7078 |
//---//
|
|
|
7079 |
}
|
|
|
7080 |
else {
|
|
|
7081 |
//=== NEEDBITS(here.bits + 7);
|
|
|
7082 |
n = here_bits + 7;
|
|
|
7083 |
while (bits < n) {
|
|
|
7084 |
if (have === 0) { break inf_leave; }
|
|
|
7085 |
have--;
|
|
|
7086 |
hold += input[next++] << bits;
|
|
|
7087 |
bits += 8;
|
|
|
7088 |
}
|
|
|
7089 |
//===//
|
|
|
7090 |
//--- DROPBITS(here.bits) ---//
|
|
|
7091 |
hold >>>= here_bits;
|
|
|
7092 |
bits -= here_bits;
|
|
|
7093 |
//---//
|
|
|
7094 |
len = 0;
|
|
|
7095 |
copy = 11 + (hold & 0x7f);//BITS(7);
|
|
|
7096 |
//--- DROPBITS(7) ---//
|
|
|
7097 |
hold >>>= 7;
|
|
|
7098 |
bits -= 7;
|
|
|
7099 |
//---//
|
|
|
7100 |
}
|
|
|
7101 |
if (state.have + copy > state.nlen + state.ndist) {
|
|
|
7102 |
strm.msg = 'invalid bit length repeat';
|
|
|
7103 |
state.mode = BAD;
|
|
|
7104 |
break;
|
|
|
7105 |
}
|
|
|
7106 |
while (copy--) {
|
|
|
7107 |
state.lens[state.have++] = len;
|
|
|
7108 |
}
|
|
|
7109 |
}
|
|
|
7110 |
}
|
|
|
7111 |
|
|
|
7112 |
/* handle error breaks in while */
|
|
|
7113 |
if (state.mode === BAD) { break; }
|
|
|
7114 |
|
|
|
7115 |
/* check for end-of-block code (better have one) */
|
|
|
7116 |
if (state.lens[256] === 0) {
|
|
|
7117 |
strm.msg = 'invalid code -- missing end-of-block';
|
|
|
7118 |
state.mode = BAD;
|
|
|
7119 |
break;
|
|
|
7120 |
}
|
|
|
7121 |
|
|
|
7122 |
/* build code tables -- note: do not change the lenbits or distbits
|
|
|
7123 |
values here (9 and 6) without reading the comments in inftrees.h
|
|
|
7124 |
concerning the ENOUGH constants, which depend on those values */
|
|
|
7125 |
state.lenbits = 9;
|
|
|
7126 |
|
|
|
7127 |
opts = {bits: state.lenbits};
|
|
|
7128 |
ret = inflate_table(LENS, state.lens, 0, state.nlen, state.lencode, 0, state.work, opts);
|
|
|
7129 |
// We have separate tables & no pointers. 2 commented lines below not needed.
|
|
|
7130 |
// state.next_index = opts.table_index;
|
|
|
7131 |
state.lenbits = opts.bits;
|
|
|
7132 |
// state.lencode = state.next;
|
|
|
7133 |
|
|
|
7134 |
if (ret) {
|
|
|
7135 |
strm.msg = 'invalid literal/lengths set';
|
|
|
7136 |
state.mode = BAD;
|
|
|
7137 |
break;
|
|
|
7138 |
}
|
|
|
7139 |
|
|
|
7140 |
state.distbits = 6;
|
|
|
7141 |
//state.distcode.copy(state.codes);
|
|
|
7142 |
// Switch to use dynamic table
|
|
|
7143 |
state.distcode = state.distdyn;
|
|
|
7144 |
opts = {bits: state.distbits};
|
|
|
7145 |
ret = inflate_table(DISTS, state.lens, state.nlen, state.ndist, state.distcode, 0, state.work, opts);
|
|
|
7146 |
// We have separate tables & no pointers. 2 commented lines below not needed.
|
|
|
7147 |
// state.next_index = opts.table_index;
|
|
|
7148 |
state.distbits = opts.bits;
|
|
|
7149 |
// state.distcode = state.next;
|
|
|
7150 |
|
|
|
7151 |
if (ret) {
|
|
|
7152 |
strm.msg = 'invalid distances set';
|
|
|
7153 |
state.mode = BAD;
|
|
|
7154 |
break;
|
|
|
7155 |
}
|
|
|
7156 |
//Tracev((stderr, 'inflate: codes ok\n'));
|
|
|
7157 |
state.mode = LEN_;
|
|
|
7158 |
if (flush === Z_TREES) { break inf_leave; }
|
|
|
7159 |
/* falls through */
|
|
|
7160 |
case LEN_:
|
|
|
7161 |
state.mode = LEN;
|
|
|
7162 |
/* falls through */
|
|
|
7163 |
case LEN:
|
|
|
7164 |
if (have >= 6 && left >= 258) {
|
|
|
7165 |
//--- RESTORE() ---
|
|
|
7166 |
strm.next_out = put;
|
|
|
7167 |
strm.avail_out = left;
|
|
|
7168 |
strm.next_in = next;
|
|
|
7169 |
strm.avail_in = have;
|
|
|
7170 |
state.hold = hold;
|
|
|
7171 |
state.bits = bits;
|
|
|
7172 |
//---
|
|
|
7173 |
inflate_fast(strm, _out);
|
|
|
7174 |
//--- LOAD() ---
|
|
|
7175 |
put = strm.next_out;
|
|
|
7176 |
output = strm.output;
|
|
|
7177 |
left = strm.avail_out;
|
|
|
7178 |
next = strm.next_in;
|
|
|
7179 |
input = strm.input;
|
|
|
7180 |
have = strm.avail_in;
|
|
|
7181 |
hold = state.hold;
|
|
|
7182 |
bits = state.bits;
|
|
|
7183 |
//---
|
|
|
7184 |
|
|
|
7185 |
if (state.mode === TYPE) {
|
|
|
7186 |
state.back = -1;
|
|
|
7187 |
}
|
|
|
7188 |
break;
|
|
|
7189 |
}
|
|
|
7190 |
state.back = 0;
|
|
|
7191 |
for (;;) {
|
|
|
7192 |
here = state.lencode[hold & ((1 << state.lenbits) -1)]; /*BITS(state.lenbits)*/
|
|
|
7193 |
here_bits = here >>> 24;
|
|
|
7194 |
here_op = (here >>> 16) & 0xff;
|
|
|
7195 |
here_val = here & 0xffff;
|
|
|
7196 |
|
|
|
7197 |
if (here_bits <= bits) { break; }
|
|
|
7198 |
//--- PULLBYTE() ---//
|
|
|
7199 |
if (have === 0) { break inf_leave; }
|
|
|
7200 |
have--;
|
|
|
7201 |
hold += input[next++] << bits;
|
|
|
7202 |
bits += 8;
|
|
|
7203 |
//---//
|
|
|
7204 |
}
|
|
|
7205 |
if (here_op && (here_op & 0xf0) === 0) {
|
|
|
7206 |
last_bits = here_bits;
|
|
|
7207 |
last_op = here_op;
|
|
|
7208 |
last_val = here_val;
|
|
|
7209 |
for (;;) {
|
|
|
7210 |
here = state.lencode[last_val +
|
|
|
7211 |
((hold & ((1 << (last_bits + last_op)) -1))/*BITS(last.bits + last.op)*/ >> last_bits)];
|
|
|
7212 |
here_bits = here >>> 24;
|
|
|
7213 |
here_op = (here >>> 16) & 0xff;
|
|
|
7214 |
here_val = here & 0xffff;
|
|
|
7215 |
|
|
|
7216 |
if ((last_bits + here_bits) <= bits) { break; }
|
|
|
7217 |
//--- PULLBYTE() ---//
|
|
|
7218 |
if (have === 0) { break inf_leave; }
|
|
|
7219 |
have--;
|
|
|
7220 |
hold += input[next++] << bits;
|
|
|
7221 |
bits += 8;
|
|
|
7222 |
//---//
|
|
|
7223 |
}
|
|
|
7224 |
//--- DROPBITS(last.bits) ---//
|
|
|
7225 |
hold >>>= last_bits;
|
|
|
7226 |
bits -= last_bits;
|
|
|
7227 |
//---//
|
|
|
7228 |
state.back += last_bits;
|
|
|
7229 |
}
|
|
|
7230 |
//--- DROPBITS(here.bits) ---//
|
|
|
7231 |
hold >>>= here_bits;
|
|
|
7232 |
bits -= here_bits;
|
|
|
7233 |
//---//
|
|
|
7234 |
state.back += here_bits;
|
|
|
7235 |
state.length = here_val;
|
|
|
7236 |
if (here_op === 0) {
|
|
|
7237 |
//Tracevv((stderr, here.val >= 0x20 && here.val < 0x7f ?
|
|
|
7238 |
// "inflate: literal '%c'\n" :
|
|
|
7239 |
// "inflate: literal 0x%02x\n", here.val));
|
|
|
7240 |
state.mode = LIT;
|
|
|
7241 |
break;
|
|
|
7242 |
}
|
|
|
7243 |
if (here_op & 32) {
|
|
|
7244 |
//Tracevv((stderr, "inflate: end of block\n"));
|
|
|
7245 |
state.back = -1;
|
|
|
7246 |
state.mode = TYPE;
|
|
|
7247 |
break;
|
|
|
7248 |
}
|
|
|
7249 |
if (here_op & 64) {
|
|
|
7250 |
strm.msg = 'invalid literal/length code';
|
|
|
7251 |
state.mode = BAD;
|
|
|
7252 |
break;
|
|
|
7253 |
}
|
|
|
7254 |
state.extra = here_op & 15;
|
|
|
7255 |
state.mode = LENEXT;
|
|
|
7256 |
/* falls through */
|
|
|
7257 |
case LENEXT:
|
|
|
7258 |
if (state.extra) {
|
|
|
7259 |
//=== NEEDBITS(state.extra);
|
|
|
7260 |
n = state.extra;
|
|
|
7261 |
while (bits < n) {
|
|
|
7262 |
if (have === 0) { break inf_leave; }
|
|
|
7263 |
have--;
|
|
|
7264 |
hold += input[next++] << bits;
|
|
|
7265 |
bits += 8;
|
|
|
7266 |
}
|
|
|
7267 |
//===//
|
|
|
7268 |
state.length += hold & ((1 << state.extra) -1)/*BITS(state.extra)*/;
|
|
|
7269 |
//--- DROPBITS(state.extra) ---//
|
|
|
7270 |
hold >>>= state.extra;
|
|
|
7271 |
bits -= state.extra;
|
|
|
7272 |
//---//
|
|
|
7273 |
state.back += state.extra;
|
|
|
7274 |
}
|
|
|
7275 |
//Tracevv((stderr, "inflate: length %u\n", state.length));
|
|
|
7276 |
state.was = state.length;
|
|
|
7277 |
state.mode = DIST;
|
|
|
7278 |
/* falls through */
|
|
|
7279 |
case DIST:
|
|
|
7280 |
for (;;) {
|
|
|
7281 |
here = state.distcode[hold & ((1 << state.distbits) -1)];/*BITS(state.distbits)*/
|
|
|
7282 |
here_bits = here >>> 24;
|
|
|
7283 |
here_op = (here >>> 16) & 0xff;
|
|
|
7284 |
here_val = here & 0xffff;
|
|
|
7285 |
|
|
|
7286 |
if ((here_bits) <= bits) { break; }
|
|
|
7287 |
//--- PULLBYTE() ---//
|
|
|
7288 |
if (have === 0) { break inf_leave; }
|
|
|
7289 |
have--;
|
|
|
7290 |
hold += input[next++] << bits;
|
|
|
7291 |
bits += 8;
|
|
|
7292 |
//---//
|
|
|
7293 |
}
|
|
|
7294 |
if ((here_op & 0xf0) === 0) {
|
|
|
7295 |
last_bits = here_bits;
|
|
|
7296 |
last_op = here_op;
|
|
|
7297 |
last_val = here_val;
|
|
|
7298 |
for (;;) {
|
|
|
7299 |
here = state.distcode[last_val +
|
|
|
7300 |
((hold & ((1 << (last_bits + last_op)) -1))/*BITS(last.bits + last.op)*/ >> last_bits)];
|
|
|
7301 |
here_bits = here >>> 24;
|
|
|
7302 |
here_op = (here >>> 16) & 0xff;
|
|
|
7303 |
here_val = here & 0xffff;
|
|
|
7304 |
|
|
|
7305 |
if ((last_bits + here_bits) <= bits) { break; }
|
|
|
7306 |
//--- PULLBYTE() ---//
|
|
|
7307 |
if (have === 0) { break inf_leave; }
|
|
|
7308 |
have--;
|
|
|
7309 |
hold += input[next++] << bits;
|
|
|
7310 |
bits += 8;
|
|
|
7311 |
//---//
|
|
|
7312 |
}
|
|
|
7313 |
//--- DROPBITS(last.bits) ---//
|
|
|
7314 |
hold >>>= last_bits;
|
|
|
7315 |
bits -= last_bits;
|
|
|
7316 |
//---//
|
|
|
7317 |
state.back += last_bits;
|
|
|
7318 |
}
|
|
|
7319 |
//--- DROPBITS(here.bits) ---//
|
|
|
7320 |
hold >>>= here_bits;
|
|
|
7321 |
bits -= here_bits;
|
|
|
7322 |
//---//
|
|
|
7323 |
state.back += here_bits;
|
|
|
7324 |
if (here_op & 64) {
|
|
|
7325 |
strm.msg = 'invalid distance code';
|
|
|
7326 |
state.mode = BAD;
|
|
|
7327 |
break;
|
|
|
7328 |
}
|
|
|
7329 |
state.offset = here_val;
|
|
|
7330 |
state.extra = (here_op) & 15;
|
|
|
7331 |
state.mode = DISTEXT;
|
|
|
7332 |
/* falls through */
|
|
|
7333 |
case DISTEXT:
|
|
|
7334 |
if (state.extra) {
|
|
|
7335 |
//=== NEEDBITS(state.extra);
|
|
|
7336 |
n = state.extra;
|
|
|
7337 |
while (bits < n) {
|
|
|
7338 |
if (have === 0) { break inf_leave; }
|
|
|
7339 |
have--;
|
|
|
7340 |
hold += input[next++] << bits;
|
|
|
7341 |
bits += 8;
|
|
|
7342 |
}
|
|
|
7343 |
//===//
|
|
|
7344 |
state.offset += hold & ((1 << state.extra) -1)/*BITS(state.extra)*/;
|
|
|
7345 |
//--- DROPBITS(state.extra) ---//
|
|
|
7346 |
hold >>>= state.extra;
|
|
|
7347 |
bits -= state.extra;
|
|
|
7348 |
//---//
|
|
|
7349 |
state.back += state.extra;
|
|
|
7350 |
}
|
|
|
7351 |
//#ifdef INFLATE_STRICT
|
|
|
7352 |
if (state.offset > state.dmax) {
|
|
|
7353 |
strm.msg = 'invalid distance too far back';
|
|
|
7354 |
state.mode = BAD;
|
|
|
7355 |
break;
|
|
|
7356 |
}
|
|
|
7357 |
//#endif
|
|
|
7358 |
//Tracevv((stderr, "inflate: distance %u\n", state.offset));
|
|
|
7359 |
state.mode = MATCH;
|
|
|
7360 |
/* falls through */
|
|
|
7361 |
case MATCH:
|
|
|
7362 |
if (left === 0) { break inf_leave; }
|
|
|
7363 |
copy = _out - left;
|
|
|
7364 |
if (state.offset > copy) { /* copy from window */
|
|
|
7365 |
copy = state.offset - copy;
|
|
|
7366 |
if (copy > state.whave) {
|
|
|
7367 |
if (state.sane) {
|
|
|
7368 |
strm.msg = 'invalid distance too far back';
|
|
|
7369 |
state.mode = BAD;
|
|
|
7370 |
break;
|
|
|
7371 |
}
|
|
|
7372 |
// (!) This block is disabled in zlib defailts,
|
|
|
7373 |
// don't enable it for binary compatibility
|
|
|
7374 |
//#ifdef INFLATE_ALLOW_INVALID_DISTANCE_TOOFAR_ARRR
|
|
|
7375 |
// Trace((stderr, "inflate.c too far\n"));
|
|
|
7376 |
// copy -= state.whave;
|
|
|
7377 |
// if (copy > state.length) { copy = state.length; }
|
|
|
7378 |
// if (copy > left) { copy = left; }
|
|
|
7379 |
// left -= copy;
|
|
|
7380 |
// state.length -= copy;
|
|
|
7381 |
// do {
|
|
|
7382 |
// output[put++] = 0;
|
|
|
7383 |
// } while (--copy);
|
|
|
7384 |
// if (state.length === 0) { state.mode = LEN; }
|
|
|
7385 |
// break;
|
|
|
7386 |
//#endif
|
|
|
7387 |
}
|
|
|
7388 |
if (copy > state.wnext) {
|
|
|
7389 |
copy -= state.wnext;
|
|
|
7390 |
from = state.wsize - copy;
|
|
|
7391 |
}
|
|
|
7392 |
else {
|
|
|
7393 |
from = state.wnext - copy;
|
|
|
7394 |
}
|
|
|
7395 |
if (copy > state.length) { copy = state.length; }
|
|
|
7396 |
from_source = state.window;
|
|
|
7397 |
}
|
|
|
7398 |
else { /* copy from output */
|
|
|
7399 |
from_source = output;
|
|
|
7400 |
from = put - state.offset;
|
|
|
7401 |
copy = state.length;
|
|
|
7402 |
}
|
|
|
7403 |
if (copy > left) { copy = left; }
|
|
|
7404 |
left -= copy;
|
|
|
7405 |
state.length -= copy;
|
|
|
7406 |
do {
|
|
|
7407 |
output[put++] = from_source[from++];
|
|
|
7408 |
} while (--copy);
|
|
|
7409 |
if (state.length === 0) { state.mode = LEN; }
|
|
|
7410 |
break;
|
|
|
7411 |
case LIT:
|
|
|
7412 |
if (left === 0) { break inf_leave; }
|
|
|
7413 |
output[put++] = state.length;
|
|
|
7414 |
left--;
|
|
|
7415 |
state.mode = LEN;
|
|
|
7416 |
break;
|
|
|
7417 |
case CHECK:
|
|
|
7418 |
if (state.wrap) {
|
|
|
7419 |
//=== NEEDBITS(32);
|
|
|
7420 |
while (bits < 32) {
|
|
|
7421 |
if (have === 0) { break inf_leave; }
|
|
|
7422 |
have--;
|
|
|
7423 |
// Use '|' insdead of '+' to make sure that result is signed
|
|
|
7424 |
hold |= input[next++] << bits;
|
|
|
7425 |
bits += 8;
|
|
|
7426 |
}
|
|
|
7427 |
//===//
|
|
|
7428 |
_out -= left;
|
|
|
7429 |
strm.total_out += _out;
|
|
|
7430 |
state.total += _out;
|
|
|
7431 |
if (_out) {
|
|
|
7432 |
strm.adler = state.check =
|
|
|
7433 |
/*UPDATE(state.check, put - _out, _out);*/
|
|
|
7434 |
(state.flags ? crc32(state.check, output, _out, put - _out) : adler32(state.check, output, _out, put - _out));
|
|
|
7435 |
|
|
|
7436 |
}
|
|
|
7437 |
_out = left;
|
|
|
7438 |
// NB: crc32 stored as signed 32-bit int, ZSWAP32 returns signed too
|
|
|
7439 |
if ((state.flags ? hold : ZSWAP32(hold)) !== state.check) {
|
|
|
7440 |
strm.msg = 'incorrect data check';
|
|
|
7441 |
state.mode = BAD;
|
|
|
7442 |
break;
|
|
|
7443 |
}
|
|
|
7444 |
//=== INITBITS();
|
|
|
7445 |
hold = 0;
|
|
|
7446 |
bits = 0;
|
|
|
7447 |
//===//
|
|
|
7448 |
//Tracev((stderr, "inflate: check matches trailer\n"));
|
|
|
7449 |
}
|
|
|
7450 |
state.mode = LENGTH;
|
|
|
7451 |
/* falls through */
|
|
|
7452 |
case LENGTH:
|
|
|
7453 |
if (state.wrap && state.flags) {
|
|
|
7454 |
//=== NEEDBITS(32);
|
|
|
7455 |
while (bits < 32) {
|
|
|
7456 |
if (have === 0) { break inf_leave; }
|
|
|
7457 |
have--;
|
|
|
7458 |
hold += input[next++] << bits;
|
|
|
7459 |
bits += 8;
|
|
|
7460 |
}
|
|
|
7461 |
//===//
|
|
|
7462 |
if (hold !== (state.total & 0xffffffff)) {
|
|
|
7463 |
strm.msg = 'incorrect length check';
|
|
|
7464 |
state.mode = BAD;
|
|
|
7465 |
break;
|
|
|
7466 |
}
|
|
|
7467 |
//=== INITBITS();
|
|
|
7468 |
hold = 0;
|
|
|
7469 |
bits = 0;
|
|
|
7470 |
//===//
|
|
|
7471 |
//Tracev((stderr, "inflate: length matches trailer\n"));
|
|
|
7472 |
}
|
|
|
7473 |
state.mode = DONE;
|
|
|
7474 |
/* falls through */
|
|
|
7475 |
case DONE:
|
|
|
7476 |
ret = Z_STREAM_END;
|
|
|
7477 |
break inf_leave;
|
|
|
7478 |
case BAD:
|
|
|
7479 |
ret = Z_DATA_ERROR;
|
|
|
7480 |
break inf_leave;
|
|
|
7481 |
case MEM:
|
|
|
7482 |
return Z_MEM_ERROR;
|
|
|
7483 |
case SYNC:
|
|
|
7484 |
/* falls through */
|
|
|
7485 |
default:
|
|
|
7486 |
return Z_STREAM_ERROR;
|
|
|
7487 |
}
|
|
|
7488 |
}
|
|
|
7489 |
|
|
|
7490 |
// inf_leave <- here is real place for "goto inf_leave", emulated via "break inf_leave"
|
|
|
7491 |
|
|
|
7492 |
/*
|
|
|
7493 |
Return from inflate(), updating the total counts and the check value.
|
|
|
7494 |
If there was no progress during the inflate() call, return a buffer
|
|
|
7495 |
error. Call updatewindow() to create and/or update the window state.
|
|
|
7496 |
Note: a memory error from inflate() is non-recoverable.
|
|
|
7497 |
*/
|
|
|
7498 |
|
|
|
7499 |
//--- RESTORE() ---
|
|
|
7500 |
strm.next_out = put;
|
|
|
7501 |
strm.avail_out = left;
|
|
|
7502 |
strm.next_in = next;
|
|
|
7503 |
strm.avail_in = have;
|
|
|
7504 |
state.hold = hold;
|
|
|
7505 |
state.bits = bits;
|
|
|
7506 |
//---
|
|
|
7507 |
|
|
|
7508 |
if (state.wsize || (_out !== strm.avail_out && state.mode < BAD &&
|
|
|
7509 |
(state.mode < CHECK || flush !== Z_FINISH))) {
|
|
|
7510 |
if (updatewindow(strm, strm.output, strm.next_out, _out - strm.avail_out)) {
|
|
|
7511 |
state.mode = MEM;
|
|
|
7512 |
return Z_MEM_ERROR;
|
|
|
7513 |
}
|
|
|
7514 |
}
|
|
|
7515 |
_in -= strm.avail_in;
|
|
|
7516 |
_out -= strm.avail_out;
|
|
|
7517 |
strm.total_in += _in;
|
|
|
7518 |
strm.total_out += _out;
|
|
|
7519 |
state.total += _out;
|
|
|
7520 |
if (state.wrap && _out) {
|
|
|
7521 |
strm.adler = state.check = /*UPDATE(state.check, strm.next_out - _out, _out);*/
|
|
|
7522 |
(state.flags ? crc32(state.check, output, _out, strm.next_out - _out) : adler32(state.check, output, _out, strm.next_out - _out));
|
|
|
7523 |
}
|
|
|
7524 |
strm.data_type = state.bits + (state.last ? 64 : 0) +
|
|
|
7525 |
(state.mode === TYPE ? 128 : 0) +
|
|
|
7526 |
(state.mode === LEN_ || state.mode === COPY_ ? 256 : 0);
|
|
|
7527 |
if (((_in === 0 && _out === 0) || flush === Z_FINISH) && ret === Z_OK) {
|
|
|
7528 |
ret = Z_BUF_ERROR;
|
|
|
7529 |
}
|
|
|
7530 |
return ret;
|
|
|
7531 |
}
|
|
|
7532 |
|
|
|
7533 |
function inflateEnd(strm) {
|
|
|
7534 |
|
|
|
7535 |
if (!strm || !strm.state /*|| strm->zfree == (free_func)0*/) {
|
|
|
7536 |
return Z_STREAM_ERROR;
|
|
|
7537 |
}
|
|
|
7538 |
|
|
|
7539 |
var state = strm.state;
|
|
|
7540 |
if (state.window) {
|
|
|
7541 |
state.window = null;
|
|
|
7542 |
}
|
|
|
7543 |
strm.state = null;
|
|
|
7544 |
return Z_OK;
|
|
|
7545 |
}
|
|
|
7546 |
|
|
|
7547 |
function inflateGetHeader(strm, head) {
|
|
|
7548 |
var state;
|
|
|
7549 |
|
|
|
7550 |
/* check state */
|
|
|
7551 |
if (!strm || !strm.state) { return Z_STREAM_ERROR; }
|
|
|
7552 |
state = strm.state;
|
|
|
7553 |
if ((state.wrap & 2) === 0) { return Z_STREAM_ERROR; }
|
|
|
7554 |
|
|
|
7555 |
/* save header structure */
|
|
|
7556 |
state.head = head;
|
|
|
7557 |
head.done = false;
|
|
|
7558 |
return Z_OK;
|
|
|
7559 |
}
|
|
|
7560 |
|
|
|
7561 |
|
|
|
7562 |
exports.inflateReset = inflateReset;
|
|
|
7563 |
exports.inflateReset2 = inflateReset2;
|
|
|
7564 |
exports.inflateResetKeep = inflateResetKeep;
|
|
|
7565 |
exports.inflateInit = inflateInit;
|
|
|
7566 |
exports.inflateInit2 = inflateInit2;
|
|
|
7567 |
exports.inflate = inflate;
|
|
|
7568 |
exports.inflateEnd = inflateEnd;
|
|
|
7569 |
exports.inflateGetHeader = inflateGetHeader;
|
|
|
7570 |
exports.inflateInfo = 'pako inflate (from Nodeca project)';
|
|
|
7571 |
|
|
|
7572 |
/* Not implemented
|
|
|
7573 |
exports.inflateCopy = inflateCopy;
|
|
|
7574 |
exports.inflateGetDictionary = inflateGetDictionary;
|
|
|
7575 |
exports.inflateMark = inflateMark;
|
|
|
7576 |
exports.inflatePrime = inflatePrime;
|
|
|
7577 |
exports.inflateSetDictionary = inflateSetDictionary;
|
|
|
7578 |
exports.inflateSync = inflateSync;
|
|
|
7579 |
exports.inflateSyncPoint = inflateSyncPoint;
|
|
|
7580 |
exports.inflateUndermine = inflateUndermine;
|
|
|
7581 |
*/
|
|
|
7582 |
},{"../utils/common":27,"./adler32":29,"./crc32":31,"./inffast":34,"./inftrees":36}],36:[function(_dereq_,module,exports){
|
|
|
7583 |
'use strict';
|
|
|
7584 |
|
|
|
7585 |
|
|
|
7586 |
var utils = _dereq_('../utils/common');
|
|
|
7587 |
|
|
|
7588 |
var MAXBITS = 15;
|
|
|
7589 |
var ENOUGH_LENS = 852;
|
|
|
7590 |
var ENOUGH_DISTS = 592;
|
|
|
7591 |
//var ENOUGH = (ENOUGH_LENS+ENOUGH_DISTS);
|
|
|
7592 |
|
|
|
7593 |
var CODES = 0;
|
|
|
7594 |
var LENS = 1;
|
|
|
7595 |
var DISTS = 2;
|
|
|
7596 |
|
|
|
7597 |
var lbase = [ /* Length codes 257..285 base */
|
|
|
7598 |
3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 15, 17, 19, 23, 27, 31,
|
|
|
7599 |
35, 43, 51, 59, 67, 83, 99, 115, 131, 163, 195, 227, 258, 0, 0
|
|
|
7600 |
];
|
|
|
7601 |
|
|
|
7602 |
var lext = [ /* Length codes 257..285 extra */
|
|
|
7603 |
16, 16, 16, 16, 16, 16, 16, 16, 17, 17, 17, 17, 18, 18, 18, 18,
|
|
|
7604 |
19, 19, 19, 19, 20, 20, 20, 20, 21, 21, 21, 21, 16, 72, 78
|
|
|
7605 |
];
|
|
|
7606 |
|
|
|
7607 |
var dbase = [ /* Distance codes 0..29 base */
|
|
|
7608 |
1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, 49, 65, 97, 129, 193,
|
|
|
7609 |
257, 385, 513, 769, 1025, 1537, 2049, 3073, 4097, 6145,
|
|
|
7610 |
8193, 12289, 16385, 24577, 0, 0
|
|
|
7611 |
];
|
|
|
7612 |
|
|
|
7613 |
var dext = [ /* Distance codes 0..29 extra */
|
|
|
7614 |
16, 16, 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22,
|
|
|
7615 |
23, 23, 24, 24, 25, 25, 26, 26, 27, 27,
|
|
|
7616 |
28, 28, 29, 29, 64, 64
|
|
|
7617 |
];
|
|
|
7618 |
|
|
|
7619 |
module.exports = function inflate_table(type, lens, lens_index, codes, table, table_index, work, opts)
|
|
|
7620 |
{
|
|
|
7621 |
var bits = opts.bits;
|
|
|
7622 |
//here = opts.here; /* table entry for duplication */
|
|
|
7623 |
|
|
|
7624 |
var len = 0; /* a code's length in bits */
|
|
|
7625 |
var sym = 0; /* index of code symbols */
|
|
|
7626 |
var min = 0, max = 0; /* minimum and maximum code lengths */
|
|
|
7627 |
var root = 0; /* number of index bits for root table */
|
|
|
7628 |
var curr = 0; /* number of index bits for current table */
|
|
|
7629 |
var drop = 0; /* code bits to drop for sub-table */
|
|
|
7630 |
var left = 0; /* number of prefix codes available */
|
|
|
7631 |
var used = 0; /* code entries in table used */
|
|
|
7632 |
var huff = 0; /* Huffman code */
|
|
|
7633 |
var incr; /* for incrementing code, index */
|
|
|
7634 |
var fill; /* index for replicating entries */
|
|
|
7635 |
var low; /* low bits for current root entry */
|
|
|
7636 |
var mask; /* mask for low root bits */
|
|
|
7637 |
var next; /* next available space in table */
|
|
|
7638 |
var base = null; /* base value table to use */
|
|
|
7639 |
var base_index = 0;
|
|
|
7640 |
// var shoextra; /* extra bits table to use */
|
|
|
7641 |
var end; /* use base and extra for symbol > end */
|
|
|
7642 |
var count = new utils.Buf16(MAXBITS+1); //[MAXBITS+1]; /* number of codes of each length */
|
|
|
7643 |
var offs = new utils.Buf16(MAXBITS+1); //[MAXBITS+1]; /* offsets in table for each length */
|
|
|
7644 |
var extra = null;
|
|
|
7645 |
var extra_index = 0;
|
|
|
7646 |
|
|
|
7647 |
var here_bits, here_op, here_val;
|
|
|
7648 |
|
|
|
7649 |
/*
|
|
|
7650 |
Process a set of code lengths to create a canonical Huffman code. The
|
|
|
7651 |
code lengths are lens[0..codes-1]. Each length corresponds to the
|
|
|
7652 |
symbols 0..codes-1. The Huffman code is generated by first sorting the
|
|
|
7653 |
symbols by length from short to long, and retaining the symbol order
|
|
|
7654 |
for codes with equal lengths. Then the code starts with all zero bits
|
|
|
7655 |
for the first code of the shortest length, and the codes are integer
|
|
|
7656 |
increments for the same length, and zeros are appended as the length
|
|
|
7657 |
increases. For the deflate format, these bits are stored backwards
|
|
|
7658 |
from their more natural integer increment ordering, and so when the
|
|
|
7659 |
decoding tables are built in the large loop below, the integer codes
|
|
|
7660 |
are incremented backwards.
|
|
|
7661 |
|
|
|
7662 |
This routine assumes, but does not check, that all of the entries in
|
|
|
7663 |
lens[] are in the range 0..MAXBITS. The caller must assure this.
|
|
|
7664 |
1..MAXBITS is interpreted as that code length. zero means that that
|
|
|
7665 |
symbol does not occur in this code.
|
|
|
7666 |
|
|
|
7667 |
The codes are sorted by computing a count of codes for each length,
|
|
|
7668 |
creating from that a table of starting indices for each length in the
|
|
|
7669 |
sorted table, and then entering the symbols in order in the sorted
|
|
|
7670 |
table. The sorted table is work[], with that space being provided by
|
|
|
7671 |
the caller.
|
|
|
7672 |
|
|
|
7673 |
The length counts are used for other purposes as well, i.e. finding
|
|
|
7674 |
the minimum and maximum length codes, determining if there are any
|
|
|
7675 |
codes at all, checking for a valid set of lengths, and looking ahead
|
|
|
7676 |
at length counts to determine sub-table sizes when building the
|
|
|
7677 |
decoding tables.
|
|
|
7678 |
*/
|
|
|
7679 |
|
|
|
7680 |
/* accumulate lengths for codes (assumes lens[] all in 0..MAXBITS) */
|
|
|
7681 |
for (len = 0; len <= MAXBITS; len++) {
|
|
|
7682 |
count[len] = 0;
|
|
|
7683 |
}
|
|
|
7684 |
for (sym = 0; sym < codes; sym++) {
|
|
|
7685 |
count[lens[lens_index + sym]]++;
|
|
|
7686 |
}
|
|
|
7687 |
|
|
|
7688 |
/* bound code lengths, force root to be within code lengths */
|
|
|
7689 |
root = bits;
|
|
|
7690 |
for (max = MAXBITS; max >= 1; max--) {
|
|
|
7691 |
if (count[max] !== 0) { break; }
|
|
|
7692 |
}
|
|
|
7693 |
if (root > max) {
|
|
|
7694 |
root = max;
|
|
|
7695 |
}
|
|
|
7696 |
if (max === 0) { /* no symbols to code at all */
|
|
|
7697 |
//table.op[opts.table_index] = 64; //here.op = (var char)64; /* invalid code marker */
|
|
|
7698 |
//table.bits[opts.table_index] = 1; //here.bits = (var char)1;
|
|
|
7699 |
//table.val[opts.table_index++] = 0; //here.val = (var short)0;
|
|
|
7700 |
table[table_index++] = (1 << 24) | (64 << 16) | 0;
|
|
|
7701 |
|
|
|
7702 |
|
|
|
7703 |
//table.op[opts.table_index] = 64;
|
|
|
7704 |
//table.bits[opts.table_index] = 1;
|
|
|
7705 |
//table.val[opts.table_index++] = 0;
|
|
|
7706 |
table[table_index++] = (1 << 24) | (64 << 16) | 0;
|
|
|
7707 |
|
|
|
7708 |
opts.bits = 1;
|
|
|
7709 |
return 0; /* no symbols, but wait for decoding to report error */
|
|
|
7710 |
}
|
|
|
7711 |
for (min = 1; min < max; min++) {
|
|
|
7712 |
if (count[min] !== 0) { break; }
|
|
|
7713 |
}
|
|
|
7714 |
if (root < min) {
|
|
|
7715 |
root = min;
|
|
|
7716 |
}
|
|
|
7717 |
|
|
|
7718 |
/* check for an over-subscribed or incomplete set of lengths */
|
|
|
7719 |
left = 1;
|
|
|
7720 |
for (len = 1; len <= MAXBITS; len++) {
|
|
|
7721 |
left <<= 1;
|
|
|
7722 |
left -= count[len];
|
|
|
7723 |
if (left < 0) {
|
|
|
7724 |
return -1;
|
|
|
7725 |
} /* over-subscribed */
|
|
|
7726 |
}
|
|
|
7727 |
if (left > 0 && (type === CODES || max !== 1)) {
|
|
|
7728 |
return -1; /* incomplete set */
|
|
|
7729 |
}
|
|
|
7730 |
|
|
|
7731 |
/* generate offsets into symbol table for each length for sorting */
|
|
|
7732 |
offs[1] = 0;
|
|
|
7733 |
for (len = 1; len < MAXBITS; len++) {
|
|
|
7734 |
offs[len + 1] = offs[len] + count[len];
|
|
|
7735 |
}
|
|
|
7736 |
|
|
|
7737 |
/* sort symbols by length, by symbol order within each length */
|
|
|
7738 |
for (sym = 0; sym < codes; sym++) {
|
|
|
7739 |
if (lens[lens_index + sym] !== 0) {
|
|
|
7740 |
work[offs[lens[lens_index + sym]]++] = sym;
|
|
|
7741 |
}
|
|
|
7742 |
}
|
|
|
7743 |
|
|
|
7744 |
/*
|
|
|
7745 |
Create and fill in decoding tables. In this loop, the table being
|
|
|
7746 |
filled is at next and has curr index bits. The code being used is huff
|
|
|
7747 |
with length len. That code is converted to an index by dropping drop
|
|
|
7748 |
bits off of the bottom. For codes where len is less than drop + curr,
|
|
|
7749 |
those top drop + curr - len bits are incremented through all values to
|
|
|
7750 |
fill the table with replicated entries.
|
|
|
7751 |
|
|
|
7752 |
root is the number of index bits for the root table. When len exceeds
|
|
|
7753 |
root, sub-tables are created pointed to by the root entry with an index
|
|
|
7754 |
of the low root bits of huff. This is saved in low to check for when a
|
|
|
7755 |
new sub-table should be started. drop is zero when the root table is
|
|
|
7756 |
being filled, and drop is root when sub-tables are being filled.
|
|
|
7757 |
|
|
|
7758 |
When a new sub-table is needed, it is necessary to look ahead in the
|
|
|
7759 |
code lengths to determine what size sub-table is needed. The length
|
|
|
7760 |
counts are used for this, and so count[] is decremented as codes are
|
|
|
7761 |
entered in the tables.
|
|
|
7762 |
|
|
|
7763 |
used keeps track of how many table entries have been allocated from the
|
|
|
7764 |
provided *table space. It is checked for LENS and DIST tables against
|
|
|
7765 |
the constants ENOUGH_LENS and ENOUGH_DISTS to guard against changes in
|
|
|
7766 |
the initial root table size constants. See the comments in inftrees.h
|
|
|
7767 |
for more information.
|
|
|
7768 |
|
|
|
7769 |
sym increments through all symbols, and the loop terminates when
|
|
|
7770 |
all codes of length max, i.e. all codes, have been processed. This
|
|
|
7771 |
routine permits incomplete codes, so another loop after this one fills
|
|
|
7772 |
in the rest of the decoding tables with invalid code markers.
|
|
|
7773 |
*/
|
|
|
7774 |
|
|
|
7775 |
/* set up for code type */
|
|
|
7776 |
// poor man optimization - use if-else instead of switch,
|
|
|
7777 |
// to avoid deopts in old v8
|
|
|
7778 |
if (type === CODES) {
|
|
|
7779 |
base = extra = work; /* dummy value--not used */
|
|
|
7780 |
end = 19;
|
|
|
7781 |
} else if (type === LENS) {
|
|
|
7782 |
base = lbase;
|
|
|
7783 |
base_index -= 257;
|
|
|
7784 |
extra = lext;
|
|
|
7785 |
extra_index -= 257;
|
|
|
7786 |
end = 256;
|
|
|
7787 |
} else { /* DISTS */
|
|
|
7788 |
base = dbase;
|
|
|
7789 |
extra = dext;
|
|
|
7790 |
end = -1;
|
|
|
7791 |
}
|
|
|
7792 |
|
|
|
7793 |
/* initialize opts for loop */
|
|
|
7794 |
huff = 0; /* starting code */
|
|
|
7795 |
sym = 0; /* starting code symbol */
|
|
|
7796 |
len = min; /* starting code length */
|
|
|
7797 |
next = table_index; /* current table to fill in */
|
|
|
7798 |
curr = root; /* current table index bits */
|
|
|
7799 |
drop = 0; /* current bits to drop from code for index */
|
|
|
7800 |
low = -1; /* trigger new sub-table when len > root */
|
|
|
7801 |
used = 1 << root; /* use root table entries */
|
|
|
7802 |
mask = used - 1; /* mask for comparing low */
|
|
|
7803 |
|
|
|
7804 |
/* check available table space */
|
|
|
7805 |
if ((type === LENS && used > ENOUGH_LENS) ||
|
|
|
7806 |
(type === DISTS && used > ENOUGH_DISTS)) {
|
|
|
7807 |
return 1;
|
|
|
7808 |
}
|
|
|
7809 |
|
|
|
7810 |
var i=0;
|
|
|
7811 |
/* process all codes and make table entries */
|
|
|
7812 |
for (;;) {
|
|
|
7813 |
i++;
|
|
|
7814 |
/* create table entry */
|
|
|
7815 |
here_bits = len - drop;
|
|
|
7816 |
if (work[sym] < end) {
|
|
|
7817 |
here_op = 0;
|
|
|
7818 |
here_val = work[sym];
|
|
|
7819 |
}
|
|
|
7820 |
else if (work[sym] > end) {
|
|
|
7821 |
here_op = extra[extra_index + work[sym]];
|
|
|
7822 |
here_val = base[base_index + work[sym]];
|
|
|
7823 |
}
|
|
|
7824 |
else {
|
|
|
7825 |
here_op = 32 + 64; /* end of block */
|
|
|
7826 |
here_val = 0;
|
|
|
7827 |
}
|
|
|
7828 |
|
|
|
7829 |
/* replicate for those indices with low len bits equal to huff */
|
|
|
7830 |
incr = 1 << (len - drop);
|
|
|
7831 |
fill = 1 << curr;
|
|
|
7832 |
min = fill; /* save offset to next table */
|
|
|
7833 |
do {
|
|
|
7834 |
fill -= incr;
|
|
|
7835 |
table[next + (huff >> drop) + fill] = (here_bits << 24) | (here_op << 16) | here_val |0;
|
|
|
7836 |
} while (fill !== 0);
|
|
|
7837 |
|
|
|
7838 |
/* backwards increment the len-bit code huff */
|
|
|
7839 |
incr = 1 << (len - 1);
|
|
|
7840 |
while (huff & incr) {
|
|
|
7841 |
incr >>= 1;
|
|
|
7842 |
}
|
|
|
7843 |
if (incr !== 0) {
|
|
|
7844 |
huff &= incr - 1;
|
|
|
7845 |
huff += incr;
|
|
|
7846 |
} else {
|
|
|
7847 |
huff = 0;
|
|
|
7848 |
}
|
|
|
7849 |
|
|
|
7850 |
/* go to next symbol, update count, len */
|
|
|
7851 |
sym++;
|
|
|
7852 |
if (--count[len] === 0) {
|
|
|
7853 |
if (len === max) { break; }
|
|
|
7854 |
len = lens[lens_index + work[sym]];
|
|
|
7855 |
}
|
|
|
7856 |
|
|
|
7857 |
/* create new sub-table if needed */
|
|
|
7858 |
if (len > root && (huff & mask) !== low) {
|
|
|
7859 |
/* if first time, transition to sub-tables */
|
|
|
7860 |
if (drop === 0) {
|
|
|
7861 |
drop = root;
|
|
|
7862 |
}
|
|
|
7863 |
|
|
|
7864 |
/* increment past last table */
|
|
|
7865 |
next += min; /* here min is 1 << curr */
|
|
|
7866 |
|
|
|
7867 |
/* determine length of next table */
|
|
|
7868 |
curr = len - drop;
|
|
|
7869 |
left = 1 << curr;
|
|
|
7870 |
while (curr + drop < max) {
|
|
|
7871 |
left -= count[curr + drop];
|
|
|
7872 |
if (left <= 0) { break; }
|
|
|
7873 |
curr++;
|
|
|
7874 |
left <<= 1;
|
|
|
7875 |
}
|
|
|
7876 |
|
|
|
7877 |
/* check for enough space */
|
|
|
7878 |
used += 1 << curr;
|
|
|
7879 |
if ((type === LENS && used > ENOUGH_LENS) ||
|
|
|
7880 |
(type === DISTS && used > ENOUGH_DISTS)) {
|
|
|
7881 |
return 1;
|
|
|
7882 |
}
|
|
|
7883 |
|
|
|
7884 |
/* point entry in root table to sub-table */
|
|
|
7885 |
low = huff & mask;
|
|
|
7886 |
/*table.op[low] = curr;
|
|
|
7887 |
table.bits[low] = root;
|
|
|
7888 |
table.val[low] = next - opts.table_index;*/
|
|
|
7889 |
table[low] = (root << 24) | (curr << 16) | (next - table_index) |0;
|
|
|
7890 |
}
|
|
|
7891 |
}
|
|
|
7892 |
|
|
|
7893 |
/* fill in remaining table entry if code is incomplete (guaranteed to have
|
|
|
7894 |
at most one remaining entry, since if the code is incomplete, the
|
|
|
7895 |
maximum code length that was allowed to get this far is one bit) */
|
|
|
7896 |
if (huff !== 0) {
|
|
|
7897 |
//table.op[next + huff] = 64; /* invalid code marker */
|
|
|
7898 |
//table.bits[next + huff] = len - drop;
|
|
|
7899 |
//table.val[next + huff] = 0;
|
|
|
7900 |
table[next + huff] = ((len - drop) << 24) | (64 << 16) |0;
|
|
|
7901 |
}
|
|
|
7902 |
|
|
|
7903 |
/* set return parameters */
|
|
|
7904 |
//opts.table_index += used;
|
|
|
7905 |
opts.bits = root;
|
|
|
7906 |
return 0;
|
|
|
7907 |
};
|
|
|
7908 |
|
|
|
7909 |
},{"../utils/common":27}],37:[function(_dereq_,module,exports){
|
|
|
7910 |
'use strict';
|
|
|
7911 |
|
|
|
7912 |
module.exports = {
|
|
|
7913 |
'2': 'need dictionary', /* Z_NEED_DICT 2 */
|
|
|
7914 |
'1': 'stream end', /* Z_STREAM_END 1 */
|
|
|
7915 |
'0': '', /* Z_OK 0 */
|
|
|
7916 |
'-1': 'file error', /* Z_ERRNO (-1) */
|
|
|
7917 |
'-2': 'stream error', /* Z_STREAM_ERROR (-2) */
|
|
|
7918 |
'-3': 'data error', /* Z_DATA_ERROR (-3) */
|
|
|
7919 |
'-4': 'insufficient memory', /* Z_MEM_ERROR (-4) */
|
|
|
7920 |
'-5': 'buffer error', /* Z_BUF_ERROR (-5) */
|
|
|
7921 |
'-6': 'incompatible version' /* Z_VERSION_ERROR (-6) */
|
|
|
7922 |
};
|
|
|
7923 |
},{}],38:[function(_dereq_,module,exports){
|
|
|
7924 |
'use strict';
|
|
|
7925 |
|
|
|
7926 |
|
|
|
7927 |
var utils = _dereq_('../utils/common');
|
|
|
7928 |
|
|
|
7929 |
/* Public constants ==========================================================*/
|
|
|
7930 |
/* ===========================================================================*/
|
|
|
7931 |
|
|
|
7932 |
|
|
|
7933 |
//var Z_FILTERED = 1;
|
|
|
7934 |
//var Z_HUFFMAN_ONLY = 2;
|
|
|
7935 |
//var Z_RLE = 3;
|
|
|
7936 |
var Z_FIXED = 4;
|
|
|
7937 |
//var Z_DEFAULT_STRATEGY = 0;
|
|
|
7938 |
|
|
|
7939 |
/* Possible values of the data_type field (though see inflate()) */
|
|
|
7940 |
var Z_BINARY = 0;
|
|
|
7941 |
var Z_TEXT = 1;
|
|
|
7942 |
//var Z_ASCII = 1; // = Z_TEXT
|
|
|
7943 |
var Z_UNKNOWN = 2;
|
|
|
7944 |
|
|
|
7945 |
/*============================================================================*/
|
|
|
7946 |
|
|
|
7947 |
|
|
|
7948 |
function zero(buf) { var len = buf.length; while (--len >= 0) { buf[len] = 0; } }
|
|
|
7949 |
|
|
|
7950 |
// From zutil.h
|
|
|
7951 |
|
|
|
7952 |
var STORED_BLOCK = 0;
|
|
|
7953 |
var STATIC_TREES = 1;
|
|
|
7954 |
var DYN_TREES = 2;
|
|
|
7955 |
/* The three kinds of block type */
|
|
|
7956 |
|
|
|
7957 |
var MIN_MATCH = 3;
|
|
|
7958 |
var MAX_MATCH = 258;
|
|
|
7959 |
/* The minimum and maximum match lengths */
|
|
|
7960 |
|
|
|
7961 |
// From deflate.h
|
|
|
7962 |
/* ===========================================================================
|
|
|
7963 |
* Internal compression state.
|
|
|
7964 |
*/
|
|
|
7965 |
|
|
|
7966 |
var LENGTH_CODES = 29;
|
|
|
7967 |
/* number of length codes, not counting the special END_BLOCK code */
|
|
|
7968 |
|
|
|
7969 |
var LITERALS = 256;
|
|
|
7970 |
/* number of literal bytes 0..255 */
|
|
|
7971 |
|
|
|
7972 |
var L_CODES = LITERALS + 1 + LENGTH_CODES;
|
|
|
7973 |
/* number of Literal or Length codes, including the END_BLOCK code */
|
|
|
7974 |
|
|
|
7975 |
var D_CODES = 30;
|
|
|
7976 |
/* number of distance codes */
|
|
|
7977 |
|
|
|
7978 |
var BL_CODES = 19;
|
|
|
7979 |
/* number of codes used to transfer the bit lengths */
|
|
|
7980 |
|
|
|
7981 |
var HEAP_SIZE = 2*L_CODES + 1;
|
|
|
7982 |
/* maximum heap size */
|
|
|
7983 |
|
|
|
7984 |
var MAX_BITS = 15;
|
|
|
7985 |
/* All codes must not exceed MAX_BITS bits */
|
|
|
7986 |
|
|
|
7987 |
var Buf_size = 16;
|
|
|
7988 |
/* size of bit buffer in bi_buf */
|
|
|
7989 |
|
|
|
7990 |
|
|
|
7991 |
/* ===========================================================================
|
|
|
7992 |
* Constants
|
|
|
7993 |
*/
|
|
|
7994 |
|
|
|
7995 |
var MAX_BL_BITS = 7;
|
|
|
7996 |
/* Bit length codes must not exceed MAX_BL_BITS bits */
|
|
|
7997 |
|
|
|
7998 |
var END_BLOCK = 256;
|
|
|
7999 |
/* end of block literal code */
|
|
|
8000 |
|
|
|
8001 |
var REP_3_6 = 16;
|
|
|
8002 |
/* repeat previous bit length 3-6 times (2 bits of repeat count) */
|
|
|
8003 |
|
|
|
8004 |
var REPZ_3_10 = 17;
|
|
|
8005 |
/* repeat a zero length 3-10 times (3 bits of repeat count) */
|
|
|
8006 |
|
|
|
8007 |
var REPZ_11_138 = 18;
|
|
|
8008 |
/* repeat a zero length 11-138 times (7 bits of repeat count) */
|
|
|
8009 |
|
|
|
8010 |
var extra_lbits = /* extra bits for each length code */
|
|
|
8011 |
[0,0,0,0,0,0,0,0,1,1,1,1,2,2,2,2,3,3,3,3,4,4,4,4,5,5,5,5,0];
|
|
|
8012 |
|
|
|
8013 |
var extra_dbits = /* extra bits for each distance code */
|
|
|
8014 |
[0,0,0,0,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,12,12,13,13];
|
|
|
8015 |
|
|
|
8016 |
var extra_blbits = /* extra bits for each bit length code */
|
|
|
8017 |
[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,3,7];
|
|
|
8018 |
|
|
|
8019 |
var bl_order =
|
|
|
8020 |
[16,17,18,0,8,7,9,6,10,5,11,4,12,3,13,2,14,1,15];
|
|
|
8021 |
/* The lengths of the bit length codes are sent in order of decreasing
|
|
|
8022 |
* probability, to avoid transmitting the lengths for unused bit length codes.
|
|
|
8023 |
*/
|
|
|
8024 |
|
|
|
8025 |
/* ===========================================================================
|
|
|
8026 |
* Local data. These are initialized only once.
|
|
|
8027 |
*/
|
|
|
8028 |
|
|
|
8029 |
// We pre-fill arrays with 0 to avoid uninitialized gaps
|
|
|
8030 |
|
|
|
8031 |
var DIST_CODE_LEN = 512; /* see definition of array dist_code below */
|
|
|
8032 |
|
|
|
8033 |
// !!!! Use flat array insdead of structure, Freq = i*2, Len = i*2+1
|
|
|
8034 |
var static_ltree = new Array((L_CODES+2) * 2);
|
|
|
8035 |
zero(static_ltree);
|
|
|
8036 |
/* The static literal tree. Since the bit lengths are imposed, there is no
|
|
|
8037 |
* need for the L_CODES extra codes used during heap construction. However
|
|
|
8038 |
* The codes 286 and 287 are needed to build a canonical tree (see _tr_init
|
|
|
8039 |
* below).
|
|
|
8040 |
*/
|
|
|
8041 |
|
|
|
8042 |
var static_dtree = new Array(D_CODES * 2);
|
|
|
8043 |
zero(static_dtree);
|
|
|
8044 |
/* The static distance tree. (Actually a trivial tree since all codes use
|
|
|
8045 |
* 5 bits.)
|
|
|
8046 |
*/
|
|
|
8047 |
|
|
|
8048 |
var _dist_code = new Array(DIST_CODE_LEN);
|
|
|
8049 |
zero(_dist_code);
|
|
|
8050 |
/* Distance codes. The first 256 values correspond to the distances
|
|
|
8051 |
* 3 .. 258, the last 256 values correspond to the top 8 bits of
|
|
|
8052 |
* the 15 bit distances.
|
|
|
8053 |
*/
|
|
|
8054 |
|
|
|
8055 |
var _length_code = new Array(MAX_MATCH-MIN_MATCH+1);
|
|
|
8056 |
zero(_length_code);
|
|
|
8057 |
/* length code for each normalized match length (0 == MIN_MATCH) */
|
|
|
8058 |
|
|
|
8059 |
var base_length = new Array(LENGTH_CODES);
|
|
|
8060 |
zero(base_length);
|
|
|
8061 |
/* First normalized length for each code (0 = MIN_MATCH) */
|
|
|
8062 |
|
|
|
8063 |
var base_dist = new Array(D_CODES);
|
|
|
8064 |
zero(base_dist);
|
|
|
8065 |
/* First normalized distance for each code (0 = distance of 1) */
|
|
|
8066 |
|
|
|
8067 |
|
|
|
8068 |
var StaticTreeDesc = function (static_tree, extra_bits, extra_base, elems, max_length) {
|
|
|
8069 |
|
|
|
8070 |
this.static_tree = static_tree; /* static tree or NULL */
|
|
|
8071 |
this.extra_bits = extra_bits; /* extra bits for each code or NULL */
|
|
|
8072 |
this.extra_base = extra_base; /* base index for extra_bits */
|
|
|
8073 |
this.elems = elems; /* max number of elements in the tree */
|
|
|
8074 |
this.max_length = max_length; /* max bit length for the codes */
|
|
|
8075 |
|
|
|
8076 |
// show if `static_tree` has data or dummy - needed for monomorphic objects
|
|
|
8077 |
this.has_stree = static_tree && static_tree.length;
|
|
|
8078 |
};
|
|
|
8079 |
|
|
|
8080 |
|
|
|
8081 |
var static_l_desc;
|
|
|
8082 |
var static_d_desc;
|
|
|
8083 |
var static_bl_desc;
|
|
|
8084 |
|
|
|
8085 |
|
|
|
8086 |
var TreeDesc = function(dyn_tree, stat_desc) {
|
|
|
8087 |
this.dyn_tree = dyn_tree; /* the dynamic tree */
|
|
|
8088 |
this.max_code = 0; /* largest code with non zero frequency */
|
|
|
8089 |
this.stat_desc = stat_desc; /* the corresponding static tree */
|
|
|
8090 |
};
|
|
|
8091 |
|
|
|
8092 |
|
|
|
8093 |
|
|
|
8094 |
function d_code(dist) {
|
|
|
8095 |
return dist < 256 ? _dist_code[dist] : _dist_code[256 + (dist >>> 7)];
|
|
|
8096 |
}
|
|
|
8097 |
|
|
|
8098 |
|
|
|
8099 |
/* ===========================================================================
|
|
|
8100 |
* Output a short LSB first on the stream.
|
|
|
8101 |
* IN assertion: there is enough room in pendingBuf.
|
|
|
8102 |
*/
|
|
|
8103 |
function put_short (s, w) {
|
|
|
8104 |
// put_byte(s, (uch)((w) & 0xff));
|
|
|
8105 |
// put_byte(s, (uch)((ush)(w) >> 8));
|
|
|
8106 |
s.pending_buf[s.pending++] = (w) & 0xff;
|
|
|
8107 |
s.pending_buf[s.pending++] = (w >>> 8) & 0xff;
|
|
|
8108 |
}
|
|
|
8109 |
|
|
|
8110 |
|
|
|
8111 |
/* ===========================================================================
|
|
|
8112 |
* Send a value on a given number of bits.
|
|
|
8113 |
* IN assertion: length <= 16 and value fits in length bits.
|
|
|
8114 |
*/
|
|
|
8115 |
function send_bits(s, value, length) {
|
|
|
8116 |
if (s.bi_valid > (Buf_size - length)) {
|
|
|
8117 |
s.bi_buf |= (value << s.bi_valid) & 0xffff;
|
|
|
8118 |
put_short(s, s.bi_buf);
|
|
|
8119 |
s.bi_buf = value >> (Buf_size - s.bi_valid);
|
|
|
8120 |
s.bi_valid += length - Buf_size;
|
|
|
8121 |
} else {
|
|
|
8122 |
s.bi_buf |= (value << s.bi_valid) & 0xffff;
|
|
|
8123 |
s.bi_valid += length;
|
|
|
8124 |
}
|
|
|
8125 |
}
|
|
|
8126 |
|
|
|
8127 |
|
|
|
8128 |
function send_code(s, c, tree) {
|
|
|
8129 |
send_bits(s, tree[c*2]/*.Code*/, tree[c*2 + 1]/*.Len*/);
|
|
|
8130 |
}
|
|
|
8131 |
|
|
|
8132 |
|
|
|
8133 |
/* ===========================================================================
|
|
|
8134 |
* Reverse the first len bits of a code, using straightforward code (a faster
|
|
|
8135 |
* method would use a table)
|
|
|
8136 |
* IN assertion: 1 <= len <= 15
|
|
|
8137 |
*/
|
|
|
8138 |
function bi_reverse(code, len) {
|
|
|
8139 |
var res = 0;
|
|
|
8140 |
do {
|
|
|
8141 |
res |= code & 1;
|
|
|
8142 |
code >>>= 1;
|
|
|
8143 |
res <<= 1;
|
|
|
8144 |
} while (--len > 0);
|
|
|
8145 |
return res >>> 1;
|
|
|
8146 |
}
|
|
|
8147 |
|
|
|
8148 |
|
|
|
8149 |
/* ===========================================================================
|
|
|
8150 |
* Flush the bit buffer, keeping at most 7 bits in it.
|
|
|
8151 |
*/
|
|
|
8152 |
function bi_flush(s) {
|
|
|
8153 |
if (s.bi_valid === 16) {
|
|
|
8154 |
put_short(s, s.bi_buf);
|
|
|
8155 |
s.bi_buf = 0;
|
|
|
8156 |
s.bi_valid = 0;
|
|
|
8157 |
|
|
|
8158 |
} else if (s.bi_valid >= 8) {
|
|
|
8159 |
s.pending_buf[s.pending++] = s.bi_buf & 0xff;
|
|
|
8160 |
s.bi_buf >>= 8;
|
|
|
8161 |
s.bi_valid -= 8;
|
|
|
8162 |
}
|
|
|
8163 |
}
|
|
|
8164 |
|
|
|
8165 |
|
|
|
8166 |
/* ===========================================================================
|
|
|
8167 |
* Compute the optimal bit lengths for a tree and update the total bit length
|
|
|
8168 |
* for the current block.
|
|
|
8169 |
* IN assertion: the fields freq and dad are set, heap[heap_max] and
|
|
|
8170 |
* above are the tree nodes sorted by increasing frequency.
|
|
|
8171 |
* OUT assertions: the field len is set to the optimal bit length, the
|
|
|
8172 |
* array bl_count contains the frequencies for each bit length.
|
|
|
8173 |
* The length opt_len is updated; static_len is also updated if stree is
|
|
|
8174 |
* not null.
|
|
|
8175 |
*/
|
|
|
8176 |
function gen_bitlen(s, desc)
|
|
|
8177 |
// deflate_state *s;
|
|
|
8178 |
// tree_desc *desc; /* the tree descriptor */
|
|
|
8179 |
{
|
|
|
8180 |
var tree = desc.dyn_tree;
|
|
|
8181 |
var max_code = desc.max_code;
|
|
|
8182 |
var stree = desc.stat_desc.static_tree;
|
|
|
8183 |
var has_stree = desc.stat_desc.has_stree;
|
|
|
8184 |
var extra = desc.stat_desc.extra_bits;
|
|
|
8185 |
var base = desc.stat_desc.extra_base;
|
|
|
8186 |
var max_length = desc.stat_desc.max_length;
|
|
|
8187 |
var h; /* heap index */
|
|
|
8188 |
var n, m; /* iterate over the tree elements */
|
|
|
8189 |
var bits; /* bit length */
|
|
|
8190 |
var xbits; /* extra bits */
|
|
|
8191 |
var f; /* frequency */
|
|
|
8192 |
var overflow = 0; /* number of elements with bit length too large */
|
|
|
8193 |
|
|
|
8194 |
for (bits = 0; bits <= MAX_BITS; bits++) {
|
|
|
8195 |
s.bl_count[bits] = 0;
|
|
|
8196 |
}
|
|
|
8197 |
|
|
|
8198 |
/* In a first pass, compute the optimal bit lengths (which may
|
|
|
8199 |
* overflow in the case of the bit length tree).
|
|
|
8200 |
*/
|
|
|
8201 |
tree[s.heap[s.heap_max]*2 + 1]/*.Len*/ = 0; /* root of the heap */
|
|
|
8202 |
|
|
|
8203 |
for (h = s.heap_max+1; h < HEAP_SIZE; h++) {
|
|
|
8204 |
n = s.heap[h];
|
|
|
8205 |
bits = tree[tree[n*2 +1]/*.Dad*/ * 2 + 1]/*.Len*/ + 1;
|
|
|
8206 |
if (bits > max_length) {
|
|
|
8207 |
bits = max_length;
|
|
|
8208 |
overflow++;
|
|
|
8209 |
}
|
|
|
8210 |
tree[n*2 + 1]/*.Len*/ = bits;
|
|
|
8211 |
/* We overwrite tree[n].Dad which is no longer needed */
|
|
|
8212 |
|
|
|
8213 |
if (n > max_code) { continue; } /* not a leaf node */
|
|
|
8214 |
|
|
|
8215 |
s.bl_count[bits]++;
|
|
|
8216 |
xbits = 0;
|
|
|
8217 |
if (n >= base) {
|
|
|
8218 |
xbits = extra[n-base];
|
|
|
8219 |
}
|
|
|
8220 |
f = tree[n * 2]/*.Freq*/;
|
|
|
8221 |
s.opt_len += f * (bits + xbits);
|
|
|
8222 |
if (has_stree) {
|
|
|
8223 |
s.static_len += f * (stree[n*2 + 1]/*.Len*/ + xbits);
|
|
|
8224 |
}
|
|
|
8225 |
}
|
|
|
8226 |
if (overflow === 0) { return; }
|
|
|
8227 |
|
|
|
8228 |
// Trace((stderr,"\nbit length overflow\n"));
|
|
|
8229 |
/* This happens for example on obj2 and pic of the Calgary corpus */
|
|
|
8230 |
|
|
|
8231 |
/* Find the first bit length which could increase: */
|
|
|
8232 |
do {
|
|
|
8233 |
bits = max_length-1;
|
|
|
8234 |
while (s.bl_count[bits] === 0) { bits--; }
|
|
|
8235 |
s.bl_count[bits]--; /* move one leaf down the tree */
|
|
|
8236 |
s.bl_count[bits+1] += 2; /* move one overflow item as its brother */
|
|
|
8237 |
s.bl_count[max_length]--;
|
|
|
8238 |
/* The brother of the overflow item also moves one step up,
|
|
|
8239 |
* but this does not affect bl_count[max_length]
|
|
|
8240 |
*/
|
|
|
8241 |
overflow -= 2;
|
|
|
8242 |
} while (overflow > 0);
|
|
|
8243 |
|
|
|
8244 |
/* Now recompute all bit lengths, scanning in increasing frequency.
|
|
|
8245 |
* h is still equal to HEAP_SIZE. (It is simpler to reconstruct all
|
|
|
8246 |
* lengths instead of fixing only the wrong ones. This idea is taken
|
|
|
8247 |
* from 'ar' written by Haruhiko Okumura.)
|
|
|
8248 |
*/
|
|
|
8249 |
for (bits = max_length; bits !== 0; bits--) {
|
|
|
8250 |
n = s.bl_count[bits];
|
|
|
8251 |
while (n !== 0) {
|
|
|
8252 |
m = s.heap[--h];
|
|
|
8253 |
if (m > max_code) { continue; }
|
|
|
8254 |
if (tree[m*2 + 1]/*.Len*/ !== bits) {
|
|
|
8255 |
// Trace((stderr,"code %d bits %d->%d\n", m, tree[m].Len, bits));
|
|
|
8256 |
s.opt_len += (bits - tree[m*2 + 1]/*.Len*/)*tree[m*2]/*.Freq*/;
|
|
|
8257 |
tree[m*2 + 1]/*.Len*/ = bits;
|
|
|
8258 |
}
|
|
|
8259 |
n--;
|
|
|
8260 |
}
|
|
|
8261 |
}
|
|
|
8262 |
}
|
|
|
8263 |
|
|
|
8264 |
|
|
|
8265 |
/* ===========================================================================
|
|
|
8266 |
* Generate the codes for a given tree and bit counts (which need not be
|
|
|
8267 |
* optimal).
|
|
|
8268 |
* IN assertion: the array bl_count contains the bit length statistics for
|
|
|
8269 |
* the given tree and the field len is set for all tree elements.
|
|
|
8270 |
* OUT assertion: the field code is set for all tree elements of non
|
|
|
8271 |
* zero code length.
|
|
|
8272 |
*/
|
|
|
8273 |
function gen_codes(tree, max_code, bl_count)
|
|
|
8274 |
// ct_data *tree; /* the tree to decorate */
|
|
|
8275 |
// int max_code; /* largest code with non zero frequency */
|
|
|
8276 |
// ushf *bl_count; /* number of codes at each bit length */
|
|
|
8277 |
{
|
|
|
8278 |
var next_code = new Array(MAX_BITS+1); /* next code value for each bit length */
|
|
|
8279 |
var code = 0; /* running code value */
|
|
|
8280 |
var bits; /* bit index */
|
|
|
8281 |
var n; /* code index */
|
|
|
8282 |
|
|
|
8283 |
/* The distribution counts are first used to generate the code values
|
|
|
8284 |
* without bit reversal.
|
|
|
8285 |
*/
|
|
|
8286 |
for (bits = 1; bits <= MAX_BITS; bits++) {
|
|
|
8287 |
next_code[bits] = code = (code + bl_count[bits-1]) << 1;
|
|
|
8288 |
}
|
|
|
8289 |
/* Check that the bit counts in bl_count are consistent. The last code
|
|
|
8290 |
* must be all ones.
|
|
|
8291 |
*/
|
|
|
8292 |
//Assert (code + bl_count[MAX_BITS]-1 == (1<<MAX_BITS)-1,
|
|
|
8293 |
// "inconsistent bit counts");
|
|
|
8294 |
//Tracev((stderr,"\ngen_codes: max_code %d ", max_code));
|
|
|
8295 |
|
|
|
8296 |
for (n = 0; n <= max_code; n++) {
|
|
|
8297 |
var len = tree[n*2 + 1]/*.Len*/;
|
|
|
8298 |
if (len === 0) { continue; }
|
|
|
8299 |
/* Now reverse the bits */
|
|
|
8300 |
tree[n*2]/*.Code*/ = bi_reverse(next_code[len]++, len);
|
|
|
8301 |
|
|
|
8302 |
//Tracecv(tree != static_ltree, (stderr,"\nn %3d %c l %2d c %4x (%x) ",
|
|
|
8303 |
// n, (isgraph(n) ? n : ' '), len, tree[n].Code, next_code[len]-1));
|
|
|
8304 |
}
|
|
|
8305 |
}
|
|
|
8306 |
|
|
|
8307 |
|
|
|
8308 |
/* ===========================================================================
|
|
|
8309 |
* Initialize the various 'constant' tables.
|
|
|
8310 |
*/
|
|
|
8311 |
function tr_static_init() {
|
|
|
8312 |
var n; /* iterates over tree elements */
|
|
|
8313 |
var bits; /* bit counter */
|
|
|
8314 |
var length; /* length value */
|
|
|
8315 |
var code; /* code value */
|
|
|
8316 |
var dist; /* distance index */
|
|
|
8317 |
var bl_count = new Array(MAX_BITS+1);
|
|
|
8318 |
/* number of codes at each bit length for an optimal tree */
|
|
|
8319 |
|
|
|
8320 |
// do check in _tr_init()
|
|
|
8321 |
//if (static_init_done) return;
|
|
|
8322 |
|
|
|
8323 |
/* For some embedded targets, global variables are not initialized: */
|
|
|
8324 |
/*#ifdef NO_INIT_GLOBAL_POINTERS
|
|
|
8325 |
static_l_desc.static_tree = static_ltree;
|
|
|
8326 |
static_l_desc.extra_bits = extra_lbits;
|
|
|
8327 |
static_d_desc.static_tree = static_dtree;
|
|
|
8328 |
static_d_desc.extra_bits = extra_dbits;
|
|
|
8329 |
static_bl_desc.extra_bits = extra_blbits;
|
|
|
8330 |
#endif*/
|
|
|
8331 |
|
|
|
8332 |
/* Initialize the mapping length (0..255) -> length code (0..28) */
|
|
|
8333 |
length = 0;
|
|
|
8334 |
for (code = 0; code < LENGTH_CODES-1; code++) {
|
|
|
8335 |
base_length[code] = length;
|
|
|
8336 |
for (n = 0; n < (1<<extra_lbits[code]); n++) {
|
|
|
8337 |
_length_code[length++] = code;
|
|
|
8338 |
}
|
|
|
8339 |
}
|
|
|
8340 |
//Assert (length == 256, "tr_static_init: length != 256");
|
|
|
8341 |
/* Note that the length 255 (match length 258) can be represented
|
|
|
8342 |
* in two different ways: code 284 + 5 bits or code 285, so we
|
|
|
8343 |
* overwrite length_code[255] to use the best encoding:
|
|
|
8344 |
*/
|
|
|
8345 |
_length_code[length-1] = code;
|
|
|
8346 |
|
|
|
8347 |
/* Initialize the mapping dist (0..32K) -> dist code (0..29) */
|
|
|
8348 |
dist = 0;
|
|
|
8349 |
for (code = 0 ; code < 16; code++) {
|
|
|
8350 |
base_dist[code] = dist;
|
|
|
8351 |
for (n = 0; n < (1<<extra_dbits[code]); n++) {
|
|
|
8352 |
_dist_code[dist++] = code;
|
|
|
8353 |
}
|
|
|
8354 |
}
|
|
|
8355 |
//Assert (dist == 256, "tr_static_init: dist != 256");
|
|
|
8356 |
dist >>= 7; /* from now on, all distances are divided by 128 */
|
|
|
8357 |
for ( ; code < D_CODES; code++) {
|
|
|
8358 |
base_dist[code] = dist << 7;
|
|
|
8359 |
for (n = 0; n < (1<<(extra_dbits[code]-7)); n++) {
|
|
|
8360 |
_dist_code[256 + dist++] = code;
|
|
|
8361 |
}
|
|
|
8362 |
}
|
|
|
8363 |
//Assert (dist == 256, "tr_static_init: 256+dist != 512");
|
|
|
8364 |
|
|
|
8365 |
/* Construct the codes of the static literal tree */
|
|
|
8366 |
for (bits = 0; bits <= MAX_BITS; bits++) {
|
|
|
8367 |
bl_count[bits] = 0;
|
|
|
8368 |
}
|
|
|
8369 |
|
|
|
8370 |
n = 0;
|
|
|
8371 |
while (n <= 143) {
|
|
|
8372 |
static_ltree[n*2 + 1]/*.Len*/ = 8;
|
|
|
8373 |
n++;
|
|
|
8374 |
bl_count[8]++;
|
|
|
8375 |
}
|
|
|
8376 |
while (n <= 255) {
|
|
|
8377 |
static_ltree[n*2 + 1]/*.Len*/ = 9;
|
|
|
8378 |
n++;
|
|
|
8379 |
bl_count[9]++;
|
|
|
8380 |
}
|
|
|
8381 |
while (n <= 279) {
|
|
|
8382 |
static_ltree[n*2 + 1]/*.Len*/ = 7;
|
|
|
8383 |
n++;
|
|
|
8384 |
bl_count[7]++;
|
|
|
8385 |
}
|
|
|
8386 |
while (n <= 287) {
|
|
|
8387 |
static_ltree[n*2 + 1]/*.Len*/ = 8;
|
|
|
8388 |
n++;
|
|
|
8389 |
bl_count[8]++;
|
|
|
8390 |
}
|
|
|
8391 |
/* Codes 286 and 287 do not exist, but we must include them in the
|
|
|
8392 |
* tree construction to get a canonical Huffman tree (longest code
|
|
|
8393 |
* all ones)
|
|
|
8394 |
*/
|
|
|
8395 |
gen_codes(static_ltree, L_CODES+1, bl_count);
|
|
|
8396 |
|
|
|
8397 |
/* The static distance tree is trivial: */
|
|
|
8398 |
for (n = 0; n < D_CODES; n++) {
|
|
|
8399 |
static_dtree[n*2 + 1]/*.Len*/ = 5;
|
|
|
8400 |
static_dtree[n*2]/*.Code*/ = bi_reverse(n, 5);
|
|
|
8401 |
}
|
|
|
8402 |
|
|
|
8403 |
// Now data ready and we can init static trees
|
|
|
8404 |
static_l_desc = new StaticTreeDesc(static_ltree, extra_lbits, LITERALS+1, L_CODES, MAX_BITS);
|
|
|
8405 |
static_d_desc = new StaticTreeDesc(static_dtree, extra_dbits, 0, D_CODES, MAX_BITS);
|
|
|
8406 |
static_bl_desc =new StaticTreeDesc(new Array(0), extra_blbits, 0, BL_CODES, MAX_BL_BITS);
|
|
|
8407 |
|
|
|
8408 |
//static_init_done = true;
|
|
|
8409 |
}
|
|
|
8410 |
|
|
|
8411 |
|
|
|
8412 |
/* ===========================================================================
|
|
|
8413 |
* Initialize a new block.
|
|
|
8414 |
*/
|
|
|
8415 |
function init_block(s) {
|
|
|
8416 |
var n; /* iterates over tree elements */
|
|
|
8417 |
|
|
|
8418 |
/* Initialize the trees. */
|
|
|
8419 |
for (n = 0; n < L_CODES; n++) { s.dyn_ltree[n*2]/*.Freq*/ = 0; }
|
|
|
8420 |
for (n = 0; n < D_CODES; n++) { s.dyn_dtree[n*2]/*.Freq*/ = 0; }
|
|
|
8421 |
for (n = 0; n < BL_CODES; n++) { s.bl_tree[n*2]/*.Freq*/ = 0; }
|
|
|
8422 |
|
|
|
8423 |
s.dyn_ltree[END_BLOCK*2]/*.Freq*/ = 1;
|
|
|
8424 |
s.opt_len = s.static_len = 0;
|
|
|
8425 |
s.last_lit = s.matches = 0;
|
|
|
8426 |
}
|
|
|
8427 |
|
|
|
8428 |
|
|
|
8429 |
/* ===========================================================================
|
|
|
8430 |
* Flush the bit buffer and align the output on a byte boundary
|
|
|
8431 |
*/
|
|
|
8432 |
function bi_windup(s)
|
|
|
8433 |
{
|
|
|
8434 |
if (s.bi_valid > 8) {
|
|
|
8435 |
put_short(s, s.bi_buf);
|
|
|
8436 |
} else if (s.bi_valid > 0) {
|
|
|
8437 |
//put_byte(s, (Byte)s->bi_buf);
|
|
|
8438 |
s.pending_buf[s.pending++] = s.bi_buf;
|
|
|
8439 |
}
|
|
|
8440 |
s.bi_buf = 0;
|
|
|
8441 |
s.bi_valid = 0;
|
|
|
8442 |
}
|
|
|
8443 |
|
|
|
8444 |
/* ===========================================================================
|
|
|
8445 |
* Copy a stored block, storing first the length and its
|
|
|
8446 |
* one's complement if requested.
|
|
|
8447 |
*/
|
|
|
8448 |
function copy_block(s, buf, len, header)
|
|
|
8449 |
//DeflateState *s;
|
|
|
8450 |
//charf *buf; /* the input data */
|
|
|
8451 |
//unsigned len; /* its length */
|
|
|
8452 |
//int header; /* true if block header must be written */
|
|
|
8453 |
{
|
|
|
8454 |
bi_windup(s); /* align on byte boundary */
|
|
|
8455 |
|
|
|
8456 |
if (header) {
|
|
|
8457 |
put_short(s, len);
|
|
|
8458 |
put_short(s, ~len);
|
|
|
8459 |
}
|
|
|
8460 |
// while (len--) {
|
|
|
8461 |
// put_byte(s, *buf++);
|
|
|
8462 |
// }
|
|
|
8463 |
utils.arraySet(s.pending_buf, s.window, buf, len, s.pending);
|
|
|
8464 |
s.pending += len;
|
|
|
8465 |
}
|
|
|
8466 |
|
|
|
8467 |
/* ===========================================================================
|
|
|
8468 |
* Compares to subtrees, using the tree depth as tie breaker when
|
|
|
8469 |
* the subtrees have equal frequency. This minimizes the worst case length.
|
|
|
8470 |
*/
|
|
|
8471 |
function smaller(tree, n, m, depth) {
|
|
|
8472 |
var _n2 = n*2;
|
|
|
8473 |
var _m2 = m*2;
|
|
|
8474 |
return (tree[_n2]/*.Freq*/ < tree[_m2]/*.Freq*/ ||
|
|
|
8475 |
(tree[_n2]/*.Freq*/ === tree[_m2]/*.Freq*/ && depth[n] <= depth[m]));
|
|
|
8476 |
}
|
|
|
8477 |
|
|
|
8478 |
/* ===========================================================================
|
|
|
8479 |
* Restore the heap property by moving down the tree starting at node k,
|
|
|
8480 |
* exchanging a node with the smallest of its two sons if necessary, stopping
|
|
|
8481 |
* when the heap property is re-established (each father smaller than its
|
|
|
8482 |
* two sons).
|
|
|
8483 |
*/
|
|
|
8484 |
function pqdownheap(s, tree, k)
|
|
|
8485 |
// deflate_state *s;
|
|
|
8486 |
// ct_data *tree; /* the tree to restore */
|
|
|
8487 |
// int k; /* node to move down */
|
|
|
8488 |
{
|
|
|
8489 |
var v = s.heap[k];
|
|
|
8490 |
var j = k << 1; /* left son of k */
|
|
|
8491 |
while (j <= s.heap_len) {
|
|
|
8492 |
/* Set j to the smallest of the two sons: */
|
|
|
8493 |
if (j < s.heap_len &&
|
|
|
8494 |
smaller(tree, s.heap[j+1], s.heap[j], s.depth)) {
|
|
|
8495 |
j++;
|
|
|
8496 |
}
|
|
|
8497 |
/* Exit if v is smaller than both sons */
|
|
|
8498 |
if (smaller(tree, v, s.heap[j], s.depth)) { break; }
|
|
|
8499 |
|
|
|
8500 |
/* Exchange v with the smallest son */
|
|
|
8501 |
s.heap[k] = s.heap[j];
|
|
|
8502 |
k = j;
|
|
|
8503 |
|
|
|
8504 |
/* And continue down the tree, setting j to the left son of k */
|
|
|
8505 |
j <<= 1;
|
|
|
8506 |
}
|
|
|
8507 |
s.heap[k] = v;
|
|
|
8508 |
}
|
|
|
8509 |
|
|
|
8510 |
|
|
|
8511 |
// inlined manually
|
|
|
8512 |
// var SMALLEST = 1;
|
|
|
8513 |
|
|
|
8514 |
/* ===========================================================================
|
|
|
8515 |
* Send the block data compressed using the given Huffman trees
|
|
|
8516 |
*/
|
|
|
8517 |
function compress_block(s, ltree, dtree)
|
|
|
8518 |
// deflate_state *s;
|
|
|
8519 |
// const ct_data *ltree; /* literal tree */
|
|
|
8520 |
// const ct_data *dtree; /* distance tree */
|
|
|
8521 |
{
|
|
|
8522 |
var dist; /* distance of matched string */
|
|
|
8523 |
var lc; /* match length or unmatched char (if dist == 0) */
|
|
|
8524 |
var lx = 0; /* running index in l_buf */
|
|
|
8525 |
var code; /* the code to send */
|
|
|
8526 |
var extra; /* number of extra bits to send */
|
|
|
8527 |
|
|
|
8528 |
if (s.last_lit !== 0) {
|
|
|
8529 |
do {
|
|
|
8530 |
dist = (s.pending_buf[s.d_buf + lx*2] << 8) | (s.pending_buf[s.d_buf + lx*2 + 1]);
|
|
|
8531 |
lc = s.pending_buf[s.l_buf + lx];
|
|
|
8532 |
lx++;
|
|
|
8533 |
|
|
|
8534 |
if (dist === 0) {
|
|
|
8535 |
send_code(s, lc, ltree); /* send a literal byte */
|
|
|
8536 |
//Tracecv(isgraph(lc), (stderr," '%c' ", lc));
|
|
|
8537 |
} else {
|
|
|
8538 |
/* Here, lc is the match length - MIN_MATCH */
|
|
|
8539 |
code = _length_code[lc];
|
|
|
8540 |
send_code(s, code+LITERALS+1, ltree); /* send the length code */
|
|
|
8541 |
extra = extra_lbits[code];
|
|
|
8542 |
if (extra !== 0) {
|
|
|
8543 |
lc -= base_length[code];
|
|
|
8544 |
send_bits(s, lc, extra); /* send the extra length bits */
|
|
|
8545 |
}
|
|
|
8546 |
dist--; /* dist is now the match distance - 1 */
|
|
|
8547 |
code = d_code(dist);
|
|
|
8548 |
//Assert (code < D_CODES, "bad d_code");
|
|
|
8549 |
|
|
|
8550 |
send_code(s, code, dtree); /* send the distance code */
|
|
|
8551 |
extra = extra_dbits[code];
|
|
|
8552 |
if (extra !== 0) {
|
|
|
8553 |
dist -= base_dist[code];
|
|
|
8554 |
send_bits(s, dist, extra); /* send the extra distance bits */
|
|
|
8555 |
}
|
|
|
8556 |
} /* literal or match pair ? */
|
|
|
8557 |
|
|
|
8558 |
/* Check that the overlay between pending_buf and d_buf+l_buf is ok: */
|
|
|
8559 |
//Assert((uInt)(s->pending) < s->lit_bufsize + 2*lx,
|
|
|
8560 |
// "pendingBuf overflow");
|
|
|
8561 |
|
|
|
8562 |
} while (lx < s.last_lit);
|
|
|
8563 |
}
|
|
|
8564 |
|
|
|
8565 |
send_code(s, END_BLOCK, ltree);
|
|
|
8566 |
}
|
|
|
8567 |
|
|
|
8568 |
|
|
|
8569 |
/* ===========================================================================
|
|
|
8570 |
* Construct one Huffman tree and assigns the code bit strings and lengths.
|
|
|
8571 |
* Update the total bit length for the current block.
|
|
|
8572 |
* IN assertion: the field freq is set for all tree elements.
|
|
|
8573 |
* OUT assertions: the fields len and code are set to the optimal bit length
|
|
|
8574 |
* and corresponding code. The length opt_len is updated; static_len is
|
|
|
8575 |
* also updated if stree is not null. The field max_code is set.
|
|
|
8576 |
*/
|
|
|
8577 |
function build_tree(s, desc)
|
|
|
8578 |
// deflate_state *s;
|
|
|
8579 |
// tree_desc *desc; /* the tree descriptor */
|
|
|
8580 |
{
|
|
|
8581 |
var tree = desc.dyn_tree;
|
|
|
8582 |
var stree = desc.stat_desc.static_tree;
|
|
|
8583 |
var has_stree = desc.stat_desc.has_stree;
|
|
|
8584 |
var elems = desc.stat_desc.elems;
|
|
|
8585 |
var n, m; /* iterate over heap elements */
|
|
|
8586 |
var max_code = -1; /* largest code with non zero frequency */
|
|
|
8587 |
var node; /* new node being created */
|
|
|
8588 |
|
|
|
8589 |
/* Construct the initial heap, with least frequent element in
|
|
|
8590 |
* heap[SMALLEST]. The sons of heap[n] are heap[2*n] and heap[2*n+1].
|
|
|
8591 |
* heap[0] is not used.
|
|
|
8592 |
*/
|
|
|
8593 |
s.heap_len = 0;
|
|
|
8594 |
s.heap_max = HEAP_SIZE;
|
|
|
8595 |
|
|
|
8596 |
for (n = 0; n < elems; n++) {
|
|
|
8597 |
if (tree[n * 2]/*.Freq*/ !== 0) {
|
|
|
8598 |
s.heap[++s.heap_len] = max_code = n;
|
|
|
8599 |
s.depth[n] = 0;
|
|
|
8600 |
|
|
|
8601 |
} else {
|
|
|
8602 |
tree[n*2 + 1]/*.Len*/ = 0;
|
|
|
8603 |
}
|
|
|
8604 |
}
|
|
|
8605 |
|
|
|
8606 |
/* The pkzip format requires that at least one distance code exists,
|
|
|
8607 |
* and that at least one bit should be sent even if there is only one
|
|
|
8608 |
* possible code. So to avoid special checks later on we force at least
|
|
|
8609 |
* two codes of non zero frequency.
|
|
|
8610 |
*/
|
|
|
8611 |
while (s.heap_len < 2) {
|
|
|
8612 |
node = s.heap[++s.heap_len] = (max_code < 2 ? ++max_code : 0);
|
|
|
8613 |
tree[node * 2]/*.Freq*/ = 1;
|
|
|
8614 |
s.depth[node] = 0;
|
|
|
8615 |
s.opt_len--;
|
|
|
8616 |
|
|
|
8617 |
if (has_stree) {
|
|
|
8618 |
s.static_len -= stree[node*2 + 1]/*.Len*/;
|
|
|
8619 |
}
|
|
|
8620 |
/* node is 0 or 1 so it does not have extra bits */
|
|
|
8621 |
}
|
|
|
8622 |
desc.max_code = max_code;
|
|
|
8623 |
|
|
|
8624 |
/* The elements heap[heap_len/2+1 .. heap_len] are leaves of the tree,
|
|
|
8625 |
* establish sub-heaps of increasing lengths:
|
|
|
8626 |
*/
|
|
|
8627 |
for (n = (s.heap_len >> 1/*int /2*/); n >= 1; n--) { pqdownheap(s, tree, n); }
|
|
|
8628 |
|
|
|
8629 |
/* Construct the Huffman tree by repeatedly combining the least two
|
|
|
8630 |
* frequent nodes.
|
|
|
8631 |
*/
|
|
|
8632 |
node = elems; /* next internal node of the tree */
|
|
|
8633 |
do {
|
|
|
8634 |
//pqremove(s, tree, n); /* n = node of least frequency */
|
|
|
8635 |
/*** pqremove ***/
|
|
|
8636 |
n = s.heap[1/*SMALLEST*/];
|
|
|
8637 |
s.heap[1/*SMALLEST*/] = s.heap[s.heap_len--];
|
|
|
8638 |
pqdownheap(s, tree, 1/*SMALLEST*/);
|
|
|
8639 |
/***/
|
|
|
8640 |
|
|
|
8641 |
m = s.heap[1/*SMALLEST*/]; /* m = node of next least frequency */
|
|
|
8642 |
|
|
|
8643 |
s.heap[--s.heap_max] = n; /* keep the nodes sorted by frequency */
|
|
|
8644 |
s.heap[--s.heap_max] = m;
|
|
|
8645 |
|
|
|
8646 |
/* Create a new node father of n and m */
|
|
|
8647 |
tree[node * 2]/*.Freq*/ = tree[n * 2]/*.Freq*/ + tree[m * 2]/*.Freq*/;
|
|
|
8648 |
s.depth[node] = (s.depth[n] >= s.depth[m] ? s.depth[n] : s.depth[m]) + 1;
|
|
|
8649 |
tree[n*2 + 1]/*.Dad*/ = tree[m*2 + 1]/*.Dad*/ = node;
|
|
|
8650 |
|
|
|
8651 |
/* and insert the new node in the heap */
|
|
|
8652 |
s.heap[1/*SMALLEST*/] = node++;
|
|
|
8653 |
pqdownheap(s, tree, 1/*SMALLEST*/);
|
|
|
8654 |
|
|
|
8655 |
} while (s.heap_len >= 2);
|
|
|
8656 |
|
|
|
8657 |
s.heap[--s.heap_max] = s.heap[1/*SMALLEST*/];
|
|
|
8658 |
|
|
|
8659 |
/* At this point, the fields freq and dad are set. We can now
|
|
|
8660 |
* generate the bit lengths.
|
|
|
8661 |
*/
|
|
|
8662 |
gen_bitlen(s, desc);
|
|
|
8663 |
|
|
|
8664 |
/* The field len is now set, we can generate the bit codes */
|
|
|
8665 |
gen_codes(tree, max_code, s.bl_count);
|
|
|
8666 |
}
|
|
|
8667 |
|
|
|
8668 |
|
|
|
8669 |
/* ===========================================================================
|
|
|
8670 |
* Scan a literal or distance tree to determine the frequencies of the codes
|
|
|
8671 |
* in the bit length tree.
|
|
|
8672 |
*/
|
|
|
8673 |
function scan_tree(s, tree, max_code)
|
|
|
8674 |
// deflate_state *s;
|
|
|
8675 |
// ct_data *tree; /* the tree to be scanned */
|
|
|
8676 |
// int max_code; /* and its largest code of non zero frequency */
|
|
|
8677 |
{
|
|
|
8678 |
var n; /* iterates over all tree elements */
|
|
|
8679 |
var prevlen = -1; /* last emitted length */
|
|
|
8680 |
var curlen; /* length of current code */
|
|
|
8681 |
|
|
|
8682 |
var nextlen = tree[0*2 + 1]/*.Len*/; /* length of next code */
|
|
|
8683 |
|
|
|
8684 |
var count = 0; /* repeat count of the current code */
|
|
|
8685 |
var max_count = 7; /* max repeat count */
|
|
|
8686 |
var min_count = 4; /* min repeat count */
|
|
|
8687 |
|
|
|
8688 |
if (nextlen === 0) {
|
|
|
8689 |
max_count = 138;
|
|
|
8690 |
min_count = 3;
|
|
|
8691 |
}
|
|
|
8692 |
tree[(max_code+1)*2 + 1]/*.Len*/ = 0xffff; /* guard */
|
|
|
8693 |
|
|
|
8694 |
for (n = 0; n <= max_code; n++) {
|
|
|
8695 |
curlen = nextlen;
|
|
|
8696 |
nextlen = tree[(n+1)*2 + 1]/*.Len*/;
|
|
|
8697 |
|
|
|
8698 |
if (++count < max_count && curlen === nextlen) {
|
|
|
8699 |
continue;
|
|
|
8700 |
|
|
|
8701 |
} else if (count < min_count) {
|
|
|
8702 |
s.bl_tree[curlen * 2]/*.Freq*/ += count;
|
|
|
8703 |
|
|
|
8704 |
} else if (curlen !== 0) {
|
|
|
8705 |
|
|
|
8706 |
if (curlen !== prevlen) { s.bl_tree[curlen * 2]/*.Freq*/++; }
|
|
|
8707 |
s.bl_tree[REP_3_6*2]/*.Freq*/++;
|
|
|
8708 |
|
|
|
8709 |
} else if (count <= 10) {
|
|
|
8710 |
s.bl_tree[REPZ_3_10*2]/*.Freq*/++;
|
|
|
8711 |
|
|
|
8712 |
} else {
|
|
|
8713 |
s.bl_tree[REPZ_11_138*2]/*.Freq*/++;
|
|
|
8714 |
}
|
|
|
8715 |
|
|
|
8716 |
count = 0;
|
|
|
8717 |
prevlen = curlen;
|
|
|
8718 |
|
|
|
8719 |
if (nextlen === 0) {
|
|
|
8720 |
max_count = 138;
|
|
|
8721 |
min_count = 3;
|
|
|
8722 |
|
|
|
8723 |
} else if (curlen === nextlen) {
|
|
|
8724 |
max_count = 6;
|
|
|
8725 |
min_count = 3;
|
|
|
8726 |
|
|
|
8727 |
} else {
|
|
|
8728 |
max_count = 7;
|
|
|
8729 |
min_count = 4;
|
|
|
8730 |
}
|
|
|
8731 |
}
|
|
|
8732 |
}
|
|
|
8733 |
|
|
|
8734 |
|
|
|
8735 |
/* ===========================================================================
|
|
|
8736 |
* Send a literal or distance tree in compressed form, using the codes in
|
|
|
8737 |
* bl_tree.
|
|
|
8738 |
*/
|
|
|
8739 |
function send_tree(s, tree, max_code)
|
|
|
8740 |
// deflate_state *s;
|
|
|
8741 |
// ct_data *tree; /* the tree to be scanned */
|
|
|
8742 |
// int max_code; /* and its largest code of non zero frequency */
|
|
|
8743 |
{
|
|
|
8744 |
var n; /* iterates over all tree elements */
|
|
|
8745 |
var prevlen = -1; /* last emitted length */
|
|
|
8746 |
var curlen; /* length of current code */
|
|
|
8747 |
|
|
|
8748 |
var nextlen = tree[0*2 + 1]/*.Len*/; /* length of next code */
|
|
|
8749 |
|
|
|
8750 |
var count = 0; /* repeat count of the current code */
|
|
|
8751 |
var max_count = 7; /* max repeat count */
|
|
|
8752 |
var min_count = 4; /* min repeat count */
|
|
|
8753 |
|
|
|
8754 |
/* tree[max_code+1].Len = -1; */ /* guard already set */
|
|
|
8755 |
if (nextlen === 0) {
|
|
|
8756 |
max_count = 138;
|
|
|
8757 |
min_count = 3;
|
|
|
8758 |
}
|
|
|
8759 |
|
|
|
8760 |
for (n = 0; n <= max_code; n++) {
|
|
|
8761 |
curlen = nextlen;
|
|
|
8762 |
nextlen = tree[(n+1)*2 + 1]/*.Len*/;
|
|
|
8763 |
|
|
|
8764 |
if (++count < max_count && curlen === nextlen) {
|
|
|
8765 |
continue;
|
|
|
8766 |
|
|
|
8767 |
} else if (count < min_count) {
|
|
|
8768 |
do { send_code(s, curlen, s.bl_tree); } while (--count !== 0);
|
|
|
8769 |
|
|
|
8770 |
} else if (curlen !== 0) {
|
|
|
8771 |
if (curlen !== prevlen) {
|
|
|
8772 |
send_code(s, curlen, s.bl_tree);
|
|
|
8773 |
count--;
|
|
|
8774 |
}
|
|
|
8775 |
//Assert(count >= 3 && count <= 6, " 3_6?");
|
|
|
8776 |
send_code(s, REP_3_6, s.bl_tree);
|
|
|
8777 |
send_bits(s, count-3, 2);
|
|
|
8778 |
|
|
|
8779 |
} else if (count <= 10) {
|
|
|
8780 |
send_code(s, REPZ_3_10, s.bl_tree);
|
|
|
8781 |
send_bits(s, count-3, 3);
|
|
|
8782 |
|
|
|
8783 |
} else {
|
|
|
8784 |
send_code(s, REPZ_11_138, s.bl_tree);
|
|
|
8785 |
send_bits(s, count-11, 7);
|
|
|
8786 |
}
|
|
|
8787 |
|
|
|
8788 |
count = 0;
|
|
|
8789 |
prevlen = curlen;
|
|
|
8790 |
if (nextlen === 0) {
|
|
|
8791 |
max_count = 138;
|
|
|
8792 |
min_count = 3;
|
|
|
8793 |
|
|
|
8794 |
} else if (curlen === nextlen) {
|
|
|
8795 |
max_count = 6;
|
|
|
8796 |
min_count = 3;
|
|
|
8797 |
|
|
|
8798 |
} else {
|
|
|
8799 |
max_count = 7;
|
|
|
8800 |
min_count = 4;
|
|
|
8801 |
}
|
|
|
8802 |
}
|
|
|
8803 |
}
|
|
|
8804 |
|
|
|
8805 |
|
|
|
8806 |
/* ===========================================================================
|
|
|
8807 |
* Construct the Huffman tree for the bit lengths and return the index in
|
|
|
8808 |
* bl_order of the last bit length code to send.
|
|
|
8809 |
*/
|
|
|
8810 |
function build_bl_tree(s) {
|
|
|
8811 |
var max_blindex; /* index of last bit length code of non zero freq */
|
|
|
8812 |
|
|
|
8813 |
/* Determine the bit length frequencies for literal and distance trees */
|
|
|
8814 |
scan_tree(s, s.dyn_ltree, s.l_desc.max_code);
|
|
|
8815 |
scan_tree(s, s.dyn_dtree, s.d_desc.max_code);
|
|
|
8816 |
|
|
|
8817 |
/* Build the bit length tree: */
|
|
|
8818 |
build_tree(s, s.bl_desc);
|
|
|
8819 |
/* opt_len now includes the length of the tree representations, except
|
|
|
8820 |
* the lengths of the bit lengths codes and the 5+5+4 bits for the counts.
|
|
|
8821 |
*/
|
|
|
8822 |
|
|
|
8823 |
/* Determine the number of bit length codes to send. The pkzip format
|
|
|
8824 |
* requires that at least 4 bit length codes be sent. (appnote.txt says
|
|
|
8825 |
* 3 but the actual value used is 4.)
|
|
|
8826 |
*/
|
|
|
8827 |
for (max_blindex = BL_CODES-1; max_blindex >= 3; max_blindex--) {
|
|
|
8828 |
if (s.bl_tree[bl_order[max_blindex]*2 + 1]/*.Len*/ !== 0) {
|
|
|
8829 |
break;
|
|
|
8830 |
}
|
|
|
8831 |
}
|
|
|
8832 |
/* Update opt_len to include the bit length tree and counts */
|
|
|
8833 |
s.opt_len += 3*(max_blindex+1) + 5+5+4;
|
|
|
8834 |
//Tracev((stderr, "\ndyn trees: dyn %ld, stat %ld",
|
|
|
8835 |
// s->opt_len, s->static_len));
|
|
|
8836 |
|
|
|
8837 |
return max_blindex;
|
|
|
8838 |
}
|
|
|
8839 |
|
|
|
8840 |
|
|
|
8841 |
/* ===========================================================================
|
|
|
8842 |
* Send the header for a block using dynamic Huffman trees: the counts, the
|
|
|
8843 |
* lengths of the bit length codes, the literal tree and the distance tree.
|
|
|
8844 |
* IN assertion: lcodes >= 257, dcodes >= 1, blcodes >= 4.
|
|
|
8845 |
*/
|
|
|
8846 |
function send_all_trees(s, lcodes, dcodes, blcodes)
|
|
|
8847 |
// deflate_state *s;
|
|
|
8848 |
// int lcodes, dcodes, blcodes; /* number of codes for each tree */
|
|
|
8849 |
{
|
|
|
8850 |
var rank; /* index in bl_order */
|
|
|
8851 |
|
|
|
8852 |
//Assert (lcodes >= 257 && dcodes >= 1 && blcodes >= 4, "not enough codes");
|
|
|
8853 |
//Assert (lcodes <= L_CODES && dcodes <= D_CODES && blcodes <= BL_CODES,
|
|
|
8854 |
// "too many codes");
|
|
|
8855 |
//Tracev((stderr, "\nbl counts: "));
|
|
|
8856 |
send_bits(s, lcodes-257, 5); /* not +255 as stated in appnote.txt */
|
|
|
8857 |
send_bits(s, dcodes-1, 5);
|
|
|
8858 |
send_bits(s, blcodes-4, 4); /* not -3 as stated in appnote.txt */
|
|
|
8859 |
for (rank = 0; rank < blcodes; rank++) {
|
|
|
8860 |
//Tracev((stderr, "\nbl code %2d ", bl_order[rank]));
|
|
|
8861 |
send_bits(s, s.bl_tree[bl_order[rank]*2 + 1]/*.Len*/, 3);
|
|
|
8862 |
}
|
|
|
8863 |
//Tracev((stderr, "\nbl tree: sent %ld", s->bits_sent));
|
|
|
8864 |
|
|
|
8865 |
send_tree(s, s.dyn_ltree, lcodes-1); /* literal tree */
|
|
|
8866 |
//Tracev((stderr, "\nlit tree: sent %ld", s->bits_sent));
|
|
|
8867 |
|
|
|
8868 |
send_tree(s, s.dyn_dtree, dcodes-1); /* distance tree */
|
|
|
8869 |
//Tracev((stderr, "\ndist tree: sent %ld", s->bits_sent));
|
|
|
8870 |
}
|
|
|
8871 |
|
|
|
8872 |
|
|
|
8873 |
/* ===========================================================================
|
|
|
8874 |
* Check if the data type is TEXT or BINARY, using the following algorithm:
|
|
|
8875 |
* - TEXT if the two conditions below are satisfied:
|
|
|
8876 |
* a) There are no non-portable control characters belonging to the
|
|
|
8877 |
* "black list" (0..6, 14..25, 28..31).
|
|
|
8878 |
* b) There is at least one printable character belonging to the
|
|
|
8879 |
* "white list" (9 {TAB}, 10 {LF}, 13 {CR}, 32..255).
|
|
|
8880 |
* - BINARY otherwise.
|
|
|
8881 |
* - The following partially-portable control characters form a
|
|
|
8882 |
* "gray list" that is ignored in this detection algorithm:
|
|
|
8883 |
* (7 {BEL}, 8 {BS}, 11 {VT}, 12 {FF}, 26 {SUB}, 27 {ESC}).
|
|
|
8884 |
* IN assertion: the fields Freq of dyn_ltree are set.
|
|
|
8885 |
*/
|
|
|
8886 |
function detect_data_type(s) {
|
|
|
8887 |
/* black_mask is the bit mask of black-listed bytes
|
|
|
8888 |
* set bits 0..6, 14..25, and 28..31
|
|
|
8889 |
* 0xf3ffc07f = binary 11110011111111111100000001111111
|
|
|
8890 |
*/
|
|
|
8891 |
var black_mask = 0xf3ffc07f;
|
|
|
8892 |
var n;
|
|
|
8893 |
|
|
|
8894 |
/* Check for non-textual ("black-listed") bytes. */
|
|
|
8895 |
for (n = 0; n <= 31; n++, black_mask >>>= 1) {
|
|
|
8896 |
if ((black_mask & 1) && (s.dyn_ltree[n*2]/*.Freq*/ !== 0)) {
|
|
|
8897 |
return Z_BINARY;
|
|
|
8898 |
}
|
|
|
8899 |
}
|
|
|
8900 |
|
|
|
8901 |
/* Check for textual ("white-listed") bytes. */
|
|
|
8902 |
if (s.dyn_ltree[9 * 2]/*.Freq*/ !== 0 || s.dyn_ltree[10 * 2]/*.Freq*/ !== 0 ||
|
|
|
8903 |
s.dyn_ltree[13 * 2]/*.Freq*/ !== 0) {
|
|
|
8904 |
return Z_TEXT;
|
|
|
8905 |
}
|
|
|
8906 |
for (n = 32; n < LITERALS; n++) {
|
|
|
8907 |
if (s.dyn_ltree[n * 2]/*.Freq*/ !== 0) {
|
|
|
8908 |
return Z_TEXT;
|
|
|
8909 |
}
|
|
|
8910 |
}
|
|
|
8911 |
|
|
|
8912 |
/* There are no "black-listed" or "white-listed" bytes:
|
|
|
8913 |
* this stream either is empty or has tolerated ("gray-listed") bytes only.
|
|
|
8914 |
*/
|
|
|
8915 |
return Z_BINARY;
|
|
|
8916 |
}
|
|
|
8917 |
|
|
|
8918 |
|
|
|
8919 |
var static_init_done = false;
|
|
|
8920 |
|
|
|
8921 |
/* ===========================================================================
|
|
|
8922 |
* Initialize the tree data structures for a new zlib stream.
|
|
|
8923 |
*/
|
|
|
8924 |
function _tr_init(s)
|
|
|
8925 |
{
|
|
|
8926 |
|
|
|
8927 |
if (!static_init_done) {
|
|
|
8928 |
tr_static_init();
|
|
|
8929 |
static_init_done = true;
|
|
|
8930 |
}
|
|
|
8931 |
|
|
|
8932 |
s.l_desc = new TreeDesc(s.dyn_ltree, static_l_desc);
|
|
|
8933 |
s.d_desc = new TreeDesc(s.dyn_dtree, static_d_desc);
|
|
|
8934 |
s.bl_desc = new TreeDesc(s.bl_tree, static_bl_desc);
|
|
|
8935 |
|
|
|
8936 |
s.bi_buf = 0;
|
|
|
8937 |
s.bi_valid = 0;
|
|
|
8938 |
|
|
|
8939 |
/* Initialize the first block of the first file: */
|
|
|
8940 |
init_block(s);
|
|
|
8941 |
}
|
|
|
8942 |
|
|
|
8943 |
|
|
|
8944 |
/* ===========================================================================
|
|
|
8945 |
* Send a stored block
|
|
|
8946 |
*/
|
|
|
8947 |
function _tr_stored_block(s, buf, stored_len, last)
|
|
|
8948 |
//DeflateState *s;
|
|
|
8949 |
//charf *buf; /* input block */
|
|
|
8950 |
//ulg stored_len; /* length of input block */
|
|
|
8951 |
//int last; /* one if this is the last block for a file */
|
|
|
8952 |
{
|
|
|
8953 |
send_bits(s, (STORED_BLOCK<<1)+(last ? 1 : 0), 3); /* send block type */
|
|
|
8954 |
copy_block(s, buf, stored_len, true); /* with header */
|
|
|
8955 |
}
|
|
|
8956 |
|
|
|
8957 |
|
|
|
8958 |
/* ===========================================================================
|
|
|
8959 |
* Send one empty static block to give enough lookahead for inflate.
|
|
|
8960 |
* This takes 10 bits, of which 7 may remain in the bit buffer.
|
|
|
8961 |
*/
|
|
|
8962 |
function _tr_align(s) {
|
|
|
8963 |
send_bits(s, STATIC_TREES<<1, 3);
|
|
|
8964 |
send_code(s, END_BLOCK, static_ltree);
|
|
|
8965 |
bi_flush(s);
|
|
|
8966 |
}
|
|
|
8967 |
|
|
|
8968 |
|
|
|
8969 |
/* ===========================================================================
|
|
|
8970 |
* Determine the best encoding for the current block: dynamic trees, static
|
|
|
8971 |
* trees or store, and output the encoded block to the zip file.
|
|
|
8972 |
*/
|
|
|
8973 |
function _tr_flush_block(s, buf, stored_len, last)
|
|
|
8974 |
//DeflateState *s;
|
|
|
8975 |
//charf *buf; /* input block, or NULL if too old */
|
|
|
8976 |
//ulg stored_len; /* length of input block */
|
|
|
8977 |
//int last; /* one if this is the last block for a file */
|
|
|
8978 |
{
|
|
|
8979 |
var opt_lenb, static_lenb; /* opt_len and static_len in bytes */
|
|
|
8980 |
var max_blindex = 0; /* index of last bit length code of non zero freq */
|
|
|
8981 |
|
|
|
8982 |
/* Build the Huffman trees unless a stored block is forced */
|
|
|
8983 |
if (s.level > 0) {
|
|
|
8984 |
|
|
|
8985 |
/* Check if the file is binary or text */
|
|
|
8986 |
if (s.strm.data_type === Z_UNKNOWN) {
|
|
|
8987 |
s.strm.data_type = detect_data_type(s);
|
|
|
8988 |
}
|
|
|
8989 |
|
|
|
8990 |
/* Construct the literal and distance trees */
|
|
|
8991 |
build_tree(s, s.l_desc);
|
|
|
8992 |
// Tracev((stderr, "\nlit data: dyn %ld, stat %ld", s->opt_len,
|
|
|
8993 |
// s->static_len));
|
|
|
8994 |
|
|
|
8995 |
build_tree(s, s.d_desc);
|
|
|
8996 |
// Tracev((stderr, "\ndist data: dyn %ld, stat %ld", s->opt_len,
|
|
|
8997 |
// s->static_len));
|
|
|
8998 |
/* At this point, opt_len and static_len are the total bit lengths of
|
|
|
8999 |
* the compressed block data, excluding the tree representations.
|
|
|
9000 |
*/
|
|
|
9001 |
|
|
|
9002 |
/* Build the bit length tree for the above two trees, and get the index
|
|
|
9003 |
* in bl_order of the last bit length code to send.
|
|
|
9004 |
*/
|
|
|
9005 |
max_blindex = build_bl_tree(s);
|
|
|
9006 |
|
|
|
9007 |
/* Determine the best encoding. Compute the block lengths in bytes. */
|
|
|
9008 |
opt_lenb = (s.opt_len+3+7) >>> 3;
|
|
|
9009 |
static_lenb = (s.static_len+3+7) >>> 3;
|
|
|
9010 |
|
|
|
9011 |
// Tracev((stderr, "\nopt %lu(%lu) stat %lu(%lu) stored %lu lit %u ",
|
|
|
9012 |
// opt_lenb, s->opt_len, static_lenb, s->static_len, stored_len,
|
|
|
9013 |
// s->last_lit));
|
|
|
9014 |
|
|
|
9015 |
if (static_lenb <= opt_lenb) { opt_lenb = static_lenb; }
|
|
|
9016 |
|
|
|
9017 |
} else {
|
|
|
9018 |
// Assert(buf != (char*)0, "lost buf");
|
|
|
9019 |
opt_lenb = static_lenb = stored_len + 5; /* force a stored block */
|
|
|
9020 |
}
|
|
|
9021 |
|
|
|
9022 |
if ((stored_len+4 <= opt_lenb) && (buf !== -1)) {
|
|
|
9023 |
/* 4: two words for the lengths */
|
|
|
9024 |
|
|
|
9025 |
/* The test buf != NULL is only necessary if LIT_BUFSIZE > WSIZE.
|
|
|
9026 |
* Otherwise we can't have processed more than WSIZE input bytes since
|
|
|
9027 |
* the last block flush, because compression would have been
|
|
|
9028 |
* successful. If LIT_BUFSIZE <= WSIZE, it is never too late to
|
|
|
9029 |
* transform a block into a stored block.
|
|
|
9030 |
*/
|
|
|
9031 |
_tr_stored_block(s, buf, stored_len, last);
|
|
|
9032 |
|
|
|
9033 |
} else if (s.strategy === Z_FIXED || static_lenb === opt_lenb) {
|
|
|
9034 |
|
|
|
9035 |
send_bits(s, (STATIC_TREES<<1) + (last ? 1 : 0), 3);
|
|
|
9036 |
compress_block(s, static_ltree, static_dtree);
|
|
|
9037 |
|
|
|
9038 |
} else {
|
|
|
9039 |
send_bits(s, (DYN_TREES<<1) + (last ? 1 : 0), 3);
|
|
|
9040 |
send_all_trees(s, s.l_desc.max_code+1, s.d_desc.max_code+1, max_blindex+1);
|
|
|
9041 |
compress_block(s, s.dyn_ltree, s.dyn_dtree);
|
|
|
9042 |
}
|
|
|
9043 |
// Assert (s->compressed_len == s->bits_sent, "bad compressed size");
|
|
|
9044 |
/* The above check is made mod 2^32, for files larger than 512 MB
|
|
|
9045 |
* and uLong implemented on 32 bits.
|
|
|
9046 |
*/
|
|
|
9047 |
init_block(s);
|
|
|
9048 |
|
|
|
9049 |
if (last) {
|
|
|
9050 |
bi_windup(s);
|
|
|
9051 |
}
|
|
|
9052 |
// Tracev((stderr,"\ncomprlen %lu(%lu) ", s->compressed_len>>3,
|
|
|
9053 |
// s->compressed_len-7*last));
|
|
|
9054 |
}
|
|
|
9055 |
|
|
|
9056 |
/* ===========================================================================
|
|
|
9057 |
* Save the match info and tally the frequency counts. Return true if
|
|
|
9058 |
* the current block must be flushed.
|
|
|
9059 |
*/
|
|
|
9060 |
function _tr_tally(s, dist, lc)
|
|
|
9061 |
// deflate_state *s;
|
|
|
9062 |
// unsigned dist; /* distance of matched string */
|
|
|
9063 |
// unsigned lc; /* match length-MIN_MATCH or unmatched char (if dist==0) */
|
|
|
9064 |
{
|
|
|
9065 |
//var out_length, in_length, dcode;
|
|
|
9066 |
|
|
|
9067 |
s.pending_buf[s.d_buf + s.last_lit * 2] = (dist >>> 8) & 0xff;
|
|
|
9068 |
s.pending_buf[s.d_buf + s.last_lit * 2 + 1] = dist & 0xff;
|
|
|
9069 |
|
|
|
9070 |
s.pending_buf[s.l_buf + s.last_lit] = lc & 0xff;
|
|
|
9071 |
s.last_lit++;
|
|
|
9072 |
|
|
|
9073 |
if (dist === 0) {
|
|
|
9074 |
/* lc is the unmatched char */
|
|
|
9075 |
s.dyn_ltree[lc*2]/*.Freq*/++;
|
|
|
9076 |
} else {
|
|
|
9077 |
s.matches++;
|
|
|
9078 |
/* Here, lc is the match length - MIN_MATCH */
|
|
|
9079 |
dist--; /* dist = match distance - 1 */
|
|
|
9080 |
//Assert((ush)dist < (ush)MAX_DIST(s) &&
|
|
|
9081 |
// (ush)lc <= (ush)(MAX_MATCH-MIN_MATCH) &&
|
|
|
9082 |
// (ush)d_code(dist) < (ush)D_CODES, "_tr_tally: bad match");
|
|
|
9083 |
|
|
|
9084 |
s.dyn_ltree[(_length_code[lc]+LITERALS+1) * 2]/*.Freq*/++;
|
|
|
9085 |
s.dyn_dtree[d_code(dist) * 2]/*.Freq*/++;
|
|
|
9086 |
}
|
|
|
9087 |
|
|
|
9088 |
// (!) This block is disabled in zlib defailts,
|
|
|
9089 |
// don't enable it for binary compatibility
|
|
|
9090 |
|
|
|
9091 |
//#ifdef TRUNCATE_BLOCK
|
|
|
9092 |
// /* Try to guess if it is profitable to stop the current block here */
|
|
|
9093 |
// if ((s.last_lit & 0x1fff) === 0 && s.level > 2) {
|
|
|
9094 |
// /* Compute an upper bound for the compressed length */
|
|
|
9095 |
// out_length = s.last_lit*8;
|
|
|
9096 |
// in_length = s.strstart - s.block_start;
|
|
|
9097 |
//
|
|
|
9098 |
// for (dcode = 0; dcode < D_CODES; dcode++) {
|
|
|
9099 |
// out_length += s.dyn_dtree[dcode*2]/*.Freq*/ * (5 + extra_dbits[dcode]);
|
|
|
9100 |
// }
|
|
|
9101 |
// out_length >>>= 3;
|
|
|
9102 |
// //Tracev((stderr,"\nlast_lit %u, in %ld, out ~%ld(%ld%%) ",
|
|
|
9103 |
// // s->last_lit, in_length, out_length,
|
|
|
9104 |
// // 100L - out_length*100L/in_length));
|
|
|
9105 |
// if (s.matches < (s.last_lit>>1)/*int /2*/ && out_length < (in_length>>1)/*int /2*/) {
|
|
|
9106 |
// return true;
|
|
|
9107 |
// }
|
|
|
9108 |
// }
|
|
|
9109 |
//#endif
|
|
|
9110 |
|
|
|
9111 |
return (s.last_lit === s.lit_bufsize-1);
|
|
|
9112 |
/* We avoid equality with lit_bufsize because of wraparound at 64K
|
|
|
9113 |
* on 16 bit machines and because stored blocks are restricted to
|
|
|
9114 |
* 64K-1 bytes.
|
|
|
9115 |
*/
|
|
|
9116 |
}
|
|
|
9117 |
|
|
|
9118 |
exports._tr_init = _tr_init;
|
|
|
9119 |
exports._tr_stored_block = _tr_stored_block;
|
|
|
9120 |
exports._tr_flush_block = _tr_flush_block;
|
|
|
9121 |
exports._tr_tally = _tr_tally;
|
|
|
9122 |
exports._tr_align = _tr_align;
|
|
|
9123 |
},{"../utils/common":27}],39:[function(_dereq_,module,exports){
|
|
|
9124 |
'use strict';
|
|
|
9125 |
|
|
|
9126 |
|
|
|
9127 |
function ZStream() {
|
|
|
9128 |
/* next input byte */
|
|
|
9129 |
this.input = null; // JS specific, because we have no pointers
|
|
|
9130 |
this.next_in = 0;
|
|
|
9131 |
/* number of bytes available at input */
|
|
|
9132 |
this.avail_in = 0;
|
|
|
9133 |
/* total number of input bytes read so far */
|
|
|
9134 |
this.total_in = 0;
|
|
|
9135 |
/* next output byte should be put there */
|
|
|
9136 |
this.output = null; // JS specific, because we have no pointers
|
|
|
9137 |
this.next_out = 0;
|
|
|
9138 |
/* remaining free space at output */
|
|
|
9139 |
this.avail_out = 0;
|
|
|
9140 |
/* total number of bytes output so far */
|
|
|
9141 |
this.total_out = 0;
|
|
|
9142 |
/* last error message, NULL if no error */
|
|
|
9143 |
this.msg = ''/*Z_NULL*/;
|
|
|
9144 |
/* not visible by applications */
|
|
|
9145 |
this.state = null;
|
|
|
9146 |
/* best guess about the data type: binary or text */
|
|
|
9147 |
this.data_type = 2/*Z_UNKNOWN*/;
|
|
|
9148 |
/* adler32 value of the uncompressed data */
|
|
|
9149 |
this.adler = 0;
|
|
|
9150 |
}
|
|
|
9151 |
|
|
|
9152 |
module.exports = ZStream;
|
|
|
9153 |
},{}]},{},[9])
|
|
|
9154 |
(9)
|
|
|
9155 |
});
|