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fork-openpgpjs/doc/jxg.js.html
Robert Nelson 3680695a69 Implement node.js support and cleanup source tree. 
Rename resources to dist.

Eliminate keyring bundle and expose keyring class in openpgp module.

Add mochaTest grunt task to run node server-side tests.

Add node_pack grunt task to create npm package into dist and install it for testing.

Add node_store config property which specifies location of localStorage emulation when using node.

Add repository info to package.json.

Move util.js to src directory from util since it is the only file there.

Rename class properties in openpgp to the new class names.
2014-01-09 02:29:30 -08:00

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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>JSDoc: Source: compression/jxg.js</title>
<script src="scripts/prettify/prettify.js"> </script>
<script src="scripts/prettify/lang-css.js"> </script>
<!--[if lt IE 9]>
<script src="//html5shiv.googlecode.com/svn/trunk/html5.js"></script>
<![endif]-->
<link type="text/css" rel="stylesheet" href="styles/prettify-tomorrow.css">
<link type="text/css" rel="stylesheet" href="styles/jsdoc-default.css">
</head>
<body>
<div id="main">
<h1 class="page-title">Source: compression/jxg.js</h1>
<section>
<article>
<pre class="prettyprint source"><code>JXG = {
exists: (function(undefined) {
return function(v) {
return !(v === undefined || v === null);
};
})()
};
JXG.decompress = function(str) {
return unescape((new JXG.Util.Unzip(JXG.Util.Base64.decodeAsArray(str))).unzip()[0][0]);
};
/*
Copyright 2008-2012
Matthias Ehmann,
Michael Gerhaeuser,
Carsten Miller,
Bianca Valentin,
Alfred Wassermann,
Peter Wilfahrt
This file is part of JSXGraph.
Dual licensed under the Apache License Version 2.0, or LGPL Version 3 licenses.
You should have received a copy of the GNU Lesser General Public License
along with JSXCompressor. If not, see &lt;http://www.gnu.org/licenses/>.
You should have received a copy of the Apache License along with JSXCompressor.
If not, see &lt;http://www.apache.org/licenses/>.
*/
/**
* @class Util class
* @classdesc Utilities for uncompressing and base64 decoding
* Class for gunzipping, unzipping and base64 decoding of files.
* It is used for reading GEONExT, Geogebra and Intergeo files.
*
* Only Huffman codes are decoded in gunzip.
* The code is based on the source code for gunzip.c by Pasi Ojala
* {@link http://www.cs.tut.fi/~albert/Dev/gunzip/gunzip.c}
* {@link http://www.cs.tut.fi/~albert}
*/
JXG.Util = {};
/**
* Unzip zip files
*/
JXG.Util.Unzip = function(barray) {
var outputArr = [],
output = "",
debug = false,
gpflags,
files = 0,
unzipped = [],
crc,
buf32k = new Array(32768),
bIdx = 0,
modeZIP = false,
CRC, SIZE,
bitReverse = [
0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0,
0x10, 0x90, 0x50, 0xd0, 0x30, 0xb0, 0x70, 0xf0,
0x08, 0x88, 0x48, 0xc8, 0x28, 0xa8, 0x68, 0xe8,
0x18, 0x98, 0x58, 0xd8, 0x38, 0xb8, 0x78, 0xf8,
0x04, 0x84, 0x44, 0xc4, 0x24, 0xa4, 0x64, 0xe4,
0x14, 0x94, 0x54, 0xd4, 0x34, 0xb4, 0x74, 0xf4,
0x0c, 0x8c, 0x4c, 0xcc, 0x2c, 0xac, 0x6c, 0xec,
0x1c, 0x9c, 0x5c, 0xdc, 0x3c, 0xbc, 0x7c, 0xfc,
0x02, 0x82, 0x42, 0xc2, 0x22, 0xa2, 0x62, 0xe2,
0x12, 0x92, 0x52, 0xd2, 0x32, 0xb2, 0x72, 0xf2,
0x0a, 0x8a, 0x4a, 0xca, 0x2a, 0xaa, 0x6a, 0xea,
0x1a, 0x9a, 0x5a, 0xda, 0x3a, 0xba, 0x7a, 0xfa,
0x06, 0x86, 0x46, 0xc6, 0x26, 0xa6, 0x66, 0xe6,
0x16, 0x96, 0x56, 0xd6, 0x36, 0xb6, 0x76, 0xf6,
0x0e, 0x8e, 0x4e, 0xce, 0x2e, 0xae, 0x6e, 0xee,
0x1e, 0x9e, 0x5e, 0xde, 0x3e, 0xbe, 0x7e, 0xfe,
0x01, 0x81, 0x41, 0xc1, 0x21, 0xa1, 0x61, 0xe1,
0x11, 0x91, 0x51, 0xd1, 0x31, 0xb1, 0x71, 0xf1,
0x09, 0x89, 0x49, 0xc9, 0x29, 0xa9, 0x69, 0xe9,
0x19, 0x99, 0x59, 0xd9, 0x39, 0xb9, 0x79, 0xf9,
0x05, 0x85, 0x45, 0xc5, 0x25, 0xa5, 0x65, 0xe5,
0x15, 0x95, 0x55, 0xd5, 0x35, 0xb5, 0x75, 0xf5,
0x0d, 0x8d, 0x4d, 0xcd, 0x2d, 0xad, 0x6d, 0xed,
0x1d, 0x9d, 0x5d, 0xdd, 0x3d, 0xbd, 0x7d, 0xfd,
0x03, 0x83, 0x43, 0xc3, 0x23, 0xa3, 0x63, 0xe3,
0x13, 0x93, 0x53, 0xd3, 0x33, 0xb3, 0x73, 0xf3,
0x0b, 0x8b, 0x4b, 0xcb, 0x2b, 0xab, 0x6b, 0xeb,
0x1b, 0x9b, 0x5b, 0xdb, 0x3b, 0xbb, 0x7b, 0xfb,
0x07, 0x87, 0x47, 0xc7, 0x27, 0xa7, 0x67, 0xe7,
0x17, 0x97, 0x57, 0xd7, 0x37, 0xb7, 0x77, 0xf7,
0x0f, 0x8f, 0x4f, 0xcf, 0x2f, 0xaf, 0x6f, 0xef,
0x1f, 0x9f, 0x5f, 0xdf, 0x3f, 0xbf, 0x7f, 0xff
],
cplens = [
3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 15, 17, 19, 23, 27, 31,
35, 43, 51, 59, 67, 83, 99, 115, 131, 163, 195, 227, 258, 0, 0
],
cplext = [
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, 99, 99
],
/* 99==invalid */
cpdist = [
0x0001, 0x0002, 0x0003, 0x0004, 0x0005, 0x0007, 0x0009, 0x000d,
0x0011, 0x0019, 0x0021, 0x0031, 0x0041, 0x0061, 0x0081, 0x00c1,
0x0101, 0x0181, 0x0201, 0x0301, 0x0401, 0x0601, 0x0801, 0x0c01,
0x1001, 0x1801, 0x2001, 0x3001, 0x4001, 0x6001
],
cpdext = [
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
],
border = [16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15],
bA = barray,
bytepos = 0,
bitpos = 0,
bb = 1,
bits = 0,
NAMEMAX = 256,
nameBuf = [],
fileout;
function readByte() {
bits += 8;
if (bytepos &lt; bA.length) {
//if (debug)
// document.write(bytepos+": "+bA[bytepos]+"&lt;br>");
return bA[bytepos++];
} else
return -1;
}
function byteAlign() {
bb = 1;
}
function readBit() {
var carry;
bits++;
carry = (bb & 1);
bb >>= 1;
if (bb === 0) {
bb = readByte();
carry = (bb & 1);
bb = (bb >> 1) | 0x80;
}
return carry;
}
function readBits(a) {
var res = 0,
i = a;
while (i--) {
res = (res &lt;&lt; 1) | readBit();
}
if (a) {
res = bitReverse[res] >> (8 - a);
}
return res;
}
function flushBuffer() {
//document.write('FLUSHBUFFER:'+buf32k);
bIdx = 0;
}
function addBuffer(a) {
SIZE++;
//CRC=updcrc(a,crc);
buf32k[bIdx++] = a;
outputArr.push(String.fromCharCode(a));
//output+=String.fromCharCode(a);
if (bIdx == 0x8000) {
//document.write('ADDBUFFER:'+buf32k);
bIdx = 0;
}
}
function HufNode() {
this.b0 = 0;
this.b1 = 0;
this.jump = null;
this.jumppos = -1;
}
var LITERALS = 288;
var literalTree = new Array(LITERALS);
var distanceTree = new Array(32);
var treepos = 0;
var Places = null;
var Places2 = null;
var impDistanceTree = new Array(64);
var impLengthTree = new Array(64);
var len = 0;
var fpos = new Array(17);
fpos[0] = 0;
var flens;
var fmax;
function IsPat() {
while (1) {
if (fpos[len] >= fmax)
return -1;
if (flens[fpos[len]] == len)
return fpos[len]++;
fpos[len]++;
}
}
function Rec() {
var curplace = Places[treepos];
var tmp;
if (debug)
document.write("&lt;br>len:" + len + " treepos:" + treepos);
if (len == 17) { //war 17
return -1;
}
treepos++;
len++;
tmp = IsPat();
if (debug)
document.write("&lt;br>IsPat " + tmp);
if (tmp >= 0) {
curplace.b0 = tmp; /* leaf cell for 0-bit */
if (debug)
document.write("&lt;br>b0 " + curplace.b0);
} else {
/* Not a Leaf cell */
curplace.b0 = 0x8000;
if (debug)
document.write("&lt;br>b0 " + curplace.b0);
if (Rec())
return -1;
}
tmp = IsPat();
if (tmp >= 0) {
curplace.b1 = tmp; /* leaf cell for 1-bit */
if (debug)
document.write("&lt;br>b1 " + curplace.b1);
curplace.jump = null; /* Just for the display routine */
} else {
/* Not a Leaf cell */
curplace.b1 = 0x8000;
if (debug)
document.write("&lt;br>b1 " + curplace.b1);
curplace.jump = Places[treepos];
curplace.jumppos = treepos;
if (Rec())
return -1;
}
len--;
return 0;
}
function CreateTree(currentTree, numval, lengths, show) {
var i;
/* Create the Huffman decode tree/table */
//document.write("&lt;br>createtree&lt;br>");
if (debug)
document.write("currentTree " + currentTree + " numval " + numval + " lengths " + lengths + " show " + show);
Places = currentTree;
treepos = 0;
flens = lengths;
fmax = numval;
for (i = 0; i &lt; 17; i++)
fpos[i] = 0;
len = 0;
if (Rec()) {
//fprintf(stderr, "invalid huffman tree\n");
if (debug)
alert("invalid huffman tree\n");
return -1;
}
if (debug) {
document.write('&lt;br>Tree: ' + Places.length);
for (var a = 0; a &lt; 32; a++) {
document.write("Places[" + a + "].b0=" + Places[a].b0 + "&lt;br>");
document.write("Places[" + a + "].b1=" + Places[a].b1 + "&lt;br>");
}
}
/*if(show) {
var tmp;
for(tmp=currentTree;tmp&lt;Places;tmp++) {
fprintf(stdout, "0x%03x 0x%03x (0x%04x)",tmp-currentTree, tmp->jump?tmp->jump-currentTree:0,(tmp->jump?tmp->jump-currentTree:0)*6+0xcf0);
if(!(tmp.b0 & 0x8000)) {
//fprintf(stdout, " 0x%03x (%c)", tmp->b0,(tmp->b0&lt;256 && isprint(tmp->b0))?tmp->b0:'<27>');
}
if(!(tmp.b1 & 0x8000)) {
if((tmp.b0 & 0x8000))
fprintf(stdout, " ");
fprintf(stdout, " 0x%03x (%c)", tmp->b1,(tmp->b1&lt;256 && isprint(tmp->b1))?tmp->b1:'<27>');
}
fprintf(stdout, "\n");
}
}*/
return 0;
}
function DecodeValue(currentTree) {
var len, i,
xtreepos = 0,
X = currentTree[xtreepos],
b;
/* decode one symbol of the data */
while (1) {
b = readBit();
if (debug)
document.write("b=" + b);
if (b) {
if (!(X.b1 & 0x8000)) {
if (debug)
document.write("ret1");
return X.b1; /* If leaf node, return data */
}
X = X.jump;
len = currentTree.length;
for (i = 0; i &lt; len; i++) {
if (currentTree[i] === X) {
xtreepos = i;
break;
}
}
//xtreepos++;
} else {
if (!(X.b0 & 0x8000)) {
if (debug)
document.write("ret2");
return X.b0; /* If leaf node, return data */
}
//X++; //??????????????????
xtreepos++;
X = currentTree[xtreepos];
}
}
}
function DeflateLoop() {
var last, c, type, i, j, len, dist;
do {
/*if((last = readBit())){
fprintf(errfp, "Last Block: ");
} else {
fprintf(errfp, "Not Last Block: ");
}*/
last = readBit();
type = readBits(2);
switch (type) {
case 0:
if (debug)
alert("Stored\n");
break;
case 1:
if (debug)
alert("Fixed Huffman codes\n");
break;
case 2:
if (debug)
alert("Dynamic Huffman codes\n");
break;
case 3:
if (debug)
alert("Reserved block type!!\n");
break;
default:
if (debug)
alert("Unexpected value %d!\n", type);
break;
}
if (type === 0) {
var blockLen, cSum;
// Stored
byteAlign();
blockLen = readByte();
blockLen |= (readByte() &lt;&lt; 8);
cSum = readByte();
cSum |= (readByte() &lt;&lt; 8);
if (((blockLen ^ ~cSum) & 0xffff)) {
document.write("BlockLen checksum mismatch\n");
}
while (blockLen--) {
c = readByte();
addBuffer(c);
}
} else if (type == 1) {
/* Fixed Huffman tables -- fixed decode routine */
while (1) {
/*
256 0000000 0
: : :
279 0010111 23
0 00110000 48
: : :
143 10111111 191
280 11000000 192
: : :
287 11000111 199
144 110010000 400
: : :
255 111111111 511
Note the bit order!
*/
j = (bitReverse[readBits(7)] >> 1);
if (j > 23) {
j = (j &lt;&lt; 1) | readBit(); /* 48..255 */
if (j > 199) { /* 200..255 */
j -= 128; /* 72..127 */
j = (j &lt;&lt; 1) | readBit(); /* 144..255 &lt;&lt; */
} else { /* 48..199 */
j -= 48; /* 0..151 */
if (j > 143) {
j = j + 136; /* 280..287 &lt;&lt; */
/* 0..143 &lt;&lt; */
}
}
} else { /* 0..23 */
j += 256; /* 256..279 &lt;&lt; */
}
if (j &lt; 256) {
addBuffer(j);
//document.write("out:"+String.fromCharCode(j));
/*fprintf(errfp, "@%d %02x\n", SIZE, j);*/
} else if (j == 256) {
/* EOF */
break;
} else {
j -= 256 + 1; /* bytes + EOF */
len = readBits(cplext[j]) + cplens[j];
j = bitReverse[readBits(5)] >> 3;
if (cpdext[j] > 8) {
dist = readBits(8);
dist |= (readBits(cpdext[j] - 8) &lt;&lt; 8);
} else {
dist = readBits(cpdext[j]);
}
dist += cpdist[j];
/*fprintf(errfp, "@%d (l%02x,d%04x)\n", SIZE, len, dist);*/
for (j = 0; j &lt; len; j++) {
c = buf32k[(bIdx - dist) & 0x7fff];
addBuffer(c);
}
}
} // while
} else if (type == 2) {
var n, literalCodes, distCodes, lenCodes;
var ll = new Array(288 + 32); // "static" just to preserve stack
// Dynamic Huffman tables
literalCodes = 257 + readBits(5);
distCodes = 1 + readBits(5);
lenCodes = 4 + readBits(4);
//document.write("&lt;br>param: "+literalCodes+" "+distCodes+" "+lenCodes+"&lt;br>");
for (j = 0; j &lt; 19; j++) {
ll[j] = 0;
}
// Get the decode tree code lengths
//document.write("&lt;br>");
for (j = 0; j &lt; lenCodes; j++) {
ll[border[j]] = readBits(3);
//document.write(ll[border[j]]+" ");
}
//fprintf(errfp, "\n");
//document.write('&lt;br>ll:'+ll);
len = distanceTree.length;
for (i = 0; i &lt; len; i++)
distanceTree[i] = new HufNode();
if (CreateTree(distanceTree, 19, ll, 0)) {
flushBuffer();
return 1;
}
if (debug) {
document.write("&lt;br>distanceTree");
for (var a = 0; a &lt; distanceTree.length; a++) {
document.write("&lt;br>" + distanceTree[a].b0 + " " + distanceTree[a].b1 + " " + distanceTree[a].jump + " " +
distanceTree[a].jumppos);
/*if (distanceTree[a].jumppos!=-1)
document.write(" "+distanceTree[a].jump.b0+" "+distanceTree[a].jump.b1);
*/
}
}
//document.write('&lt;BR>tree created');
//read in literal and distance code lengths
n = literalCodes + distCodes;
i = 0;
var z = -1;
if (debug)
document.write("&lt;br>n=" + n + " bits: " + bits + "&lt;br>");
while (i &lt; n) {
z++;
j = DecodeValue(distanceTree);
if (debug)
document.write("&lt;br>" + z + " i:" + i + " decode: " + j + " bits " + bits + "&lt;br>");
if (j &lt; 16) { // length of code in bits (0..15)
ll[i++] = j;
} else if (j == 16) { // repeat last length 3 to 6 times
var l;
j = 3 + readBits(2);
if (i + j > n) {
flushBuffer();
return 1;
}
l = i ? ll[i - 1] : 0;
while (j--) {
ll[i++] = l;
}
} else {
if (j == 17) { // 3 to 10 zero length codes
j = 3 + readBits(3);
} else { // j == 18: 11 to 138 zero length codes
j = 11 + readBits(7);
}
if (i + j > n) {
flushBuffer();
return 1;
}
while (j--) {
ll[i++] = 0;
}
}
}
/*for(j=0; j&lt;literalCodes+distCodes; j++) {
//fprintf(errfp, "%d ", ll[j]);
if ((j&7)==7)
fprintf(errfp, "\n");
}
fprintf(errfp, "\n");*/
// Can overwrite tree decode tree as it is not used anymore
len = literalTree.length;
for (i = 0; i &lt; len; i++)
literalTree[i] = new HufNode();
if (CreateTree(literalTree, literalCodes, ll, 0)) {
flushBuffer();
return 1;
}
len = literalTree.length;
for (i = 0; i &lt; len; i++)
distanceTree[i] = new HufNode();
var ll2 = [];
for (i = literalCodes; i &lt; ll.length; i++) {
ll2[i - literalCodes] = ll[i];
}
if (CreateTree(distanceTree, distCodes, ll2, 0)) {
flushBuffer();
return 1;
}
if (debug)
document.write("&lt;br>literalTree");
outer: while (1) {
j = DecodeValue(literalTree);
if (j >= 256) { // In C64: if carry set
j -= 256;
if (j === 0) {
// EOF
break;
}
j--;
len = readBits(cplext[j]) + cplens[j];
j = DecodeValue(distanceTree);
if (cpdext[j] > 8) {
dist = readBits(8);
dist |= (readBits(cpdext[j] - 8) &lt;&lt; 8);
} else {
dist = readBits(cpdext[j]);
}
dist += cpdist[j];
while (len--) {
if (bIdx - dist &lt; 0) {
break outer;
}
c = buf32k[(bIdx - dist) & 0x7fff];
addBuffer(c);
}
} else {
addBuffer(j);
}
}
}
} while (!last);
flushBuffer();
byteAlign();
return 0;
}
JXG.Util.Unzip.prototype.unzipFile = function(name) {
var i;
this.unzip();
//alert(unzipped[0][1]);
for (i = 0; i &lt; unzipped.length; i++) {
if (unzipped[i][1] == name) {
return unzipped[i][0];
}
}
};
JXG.Util.Unzip.prototype.deflate = function() {
outputArr = [];
var tmp = [];
modeZIP = false;
DeflateLoop();
if (debug)
alert(outputArr.join(''));
unzipped[files] = new Array(2);
unzipped[files][0] = outputArr.join('');
unzipped[files][1] = "DEFLATE";
files++;
return unzipped;
};
JXG.Util.Unzip.prototype.unzip = function() {
//convertToByteArray(input);
if (debug)
alert(bA);
/*for (i=0;i&lt;bA.length*8;i++){
document.write(readBit());
if ((i+1)%8==0)
document.write(" ");
}*/
/*for (i=0;i&lt;bA.length;i++){
document.write(readByte()+" ");
if ((i+1)%8==0)
document.write(" ");
}
for (i=0;i&lt;bA.length;i++){
document.write(bA[i]+" ");
if ((i+1)%16==0)
document.write("&lt;br>");
}
*/
//alert(bA);
nextFile();
return unzipped;
};
function nextFile() {
if (debug)
alert("NEXTFILE");
outputArr = [];
var tmp = [];
modeZIP = false;
tmp[0] = readByte();
tmp[1] = readByte();
if (debug)
alert("type: " + tmp[0] + " " + tmp[1]);
if (tmp[0] == parseInt("78", 16) && tmp[1] == parseInt("da", 16)) { //GZIP
if (debug)
alert("GEONExT-GZIP");
DeflateLoop();
if (debug)
alert(outputArr.join(''));
unzipped[files] = new Array(2);
unzipped[files][0] = outputArr.join('');
unzipped[files][1] = "geonext.gxt";
files++;
}
if (tmp[0] == parseInt("78", 16) && tmp[1] == parseInt("9c", 16)) { //ZLIB
if (debug)
alert("ZLIB");
DeflateLoop();
if (debug)
alert(outputArr.join(''));
unzipped[files] = new Array(2);
unzipped[files][0] = outputArr.join('');
unzipped[files][1] = "ZLIB";
files++;
}
if (tmp[0] == parseInt("1f", 16) && tmp[1] == parseInt("8b", 16)) { //GZIP
if (debug)
alert("GZIP");
//DeflateLoop();
skipdir();
if (debug)
alert(outputArr.join(''));
unzipped[files] = new Array(2);
unzipped[files][0] = outputArr.join('');
unzipped[files][1] = "file";
files++;
}
if (tmp[0] == parseInt("50", 16) && tmp[1] == parseInt("4b", 16)) { //ZIP
modeZIP = true;
tmp[2] = readByte();
tmp[3] = readByte();
if (tmp[2] == parseInt("3", 16) && tmp[3] == parseInt("4", 16)) {
//MODE_ZIP
tmp[0] = readByte();
tmp[1] = readByte();
if (debug)
alert("ZIP-Version: " + tmp[1] + " " + tmp[0] / 10 + "." + tmp[0] % 10);
gpflags = readByte();
gpflags |= (readByte() &lt;&lt; 8);
if (debug)
alert("gpflags: " + gpflags);
var method = readByte();
method |= (readByte() &lt;&lt; 8);
if (debug)
alert("method: " + method);
readByte();
readByte();
readByte();
readByte();
var crc = readByte();
crc |= (readByte() &lt;&lt; 8);
crc |= (readByte() &lt;&lt; 16);
crc |= (readByte() &lt;&lt; 24);
var compSize = readByte();
compSize |= (readByte() &lt;&lt; 8);
compSize |= (readByte() &lt;&lt; 16);
compSize |= (readByte() &lt;&lt; 24);
var size = readByte();
size |= (readByte() &lt;&lt; 8);
size |= (readByte() &lt;&lt; 16);
size |= (readByte() &lt;&lt; 24);
if (debug)
alert("local CRC: " + crc + "\nlocal Size: " + size + "\nlocal CompSize: " + compSize);
var filelen = readByte();
filelen |= (readByte() &lt;&lt; 8);
var extralen = readByte();
extralen |= (readByte() &lt;&lt; 8);
if (debug)
alert("filelen " + filelen);
i = 0;
nameBuf = [];
var c;
while (filelen--) {
c = readByte();
if (c == "/" | c == ":") {
i = 0;
} else if (i &lt; NAMEMAX - 1)
nameBuf[i++] = String.fromCharCode(c);
}
if (debug)
alert("nameBuf: " + nameBuf);
//nameBuf[i] = "\0";
if (!fileout)
fileout = nameBuf;
var i = 0;
while (i &lt; extralen) {
c = readByte();
i++;
}
CRC = 0xffffffff;
SIZE = 0;
if (size === 0 && fileOut.charAt(fileout.length - 1) == "/") {
//skipdir
if (debug)
alert("skipdir");
}
if (method == 8) {
DeflateLoop();
if (debug)
alert(outputArr.join(''));
unzipped[files] = new Array(2);
unzipped[files][0] = outputArr.join('');
unzipped[files][1] = nameBuf.join('');
files++;
//return outputArr.join('');
}
skipdir();
}
}
}
function skipdir() {
var crc,
tmp = [],
compSize, size, os, i, c;
if ((gpflags & 8)) {
tmp[0] = readByte();
tmp[1] = readByte();
tmp[2] = readByte();
tmp[3] = readByte();
if (tmp[0] == parseInt("50", 16) &&
tmp[1] == parseInt("4b", 16) &&
tmp[2] == parseInt("07", 16) &&
tmp[3] == parseInt("08", 16)) {
crc = readByte();
crc |= (readByte() &lt;&lt; 8);
crc |= (readByte() &lt;&lt; 16);
crc |= (readByte() &lt;&lt; 24);
} else {
crc = tmp[0] | (tmp[1] &lt;&lt; 8) | (tmp[2] &lt;&lt; 16) | (tmp[3] &lt;&lt; 24);
}
compSize = readByte();
compSize |= (readByte() &lt;&lt; 8);
compSize |= (readByte() &lt;&lt; 16);
compSize |= (readByte() &lt;&lt; 24);
size = readByte();
size |= (readByte() &lt;&lt; 8);
size |= (readByte() &lt;&lt; 16);
size |= (readByte() &lt;&lt; 24);
if (debug)
alert("CRC:");
}
if (modeZIP)
nextFile();
tmp[0] = readByte();
if (tmp[0] != 8) {
if (debug)
alert("Unknown compression method!");
return 0;
}
gpflags = readByte();
if (debug) {
if ((gpflags & ~(parseInt("1f", 16))))
alert("Unknown flags set!");
}
readByte();
readByte();
readByte();
readByte();
readByte();
os = readByte();
if ((gpflags & 4)) {
tmp[0] = readByte();
tmp[2] = readByte();
len = tmp[0] + 256 * tmp[1];
if (debug)
alert("Extra field size: " + len);
for (i = 0; i &lt; len; i++)
readByte();
}
if ((gpflags & 8)) {
i = 0;
nameBuf = [];
while (c = readByte()) {
if (c == "7" || c == ":")
i = 0;
if (i &lt; NAMEMAX - 1)
nameBuf[i++] = c;
}
//nameBuf[i] = "\0";
if (debug)
alert("original file name: " + nameBuf);
}
if ((gpflags & 16)) {
while (c = readByte()) {
//FILE COMMENT
}
}
if ((gpflags & 2)) {
readByte();
readByte();
}
DeflateLoop();
crc = readByte();
crc |= (readByte() &lt;&lt; 8);
crc |= (readByte() &lt;&lt; 16);
crc |= (readByte() &lt;&lt; 24);
size = readByte();
size |= (readByte() &lt;&lt; 8);
size |= (readByte() &lt;&lt; 16);
size |= (readByte() &lt;&lt; 24);
if (modeZIP)
nextFile();
}
};
/**
* Base64 encoding / decoding
* {@link http://www.webtoolkit.info/}
*/
JXG.Util.Base64 = {
// private property
_keyStr: "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",
// public method for encoding
encode: function(input) {
var output = [],
chr1, chr2, chr3, enc1, enc2, enc3, enc4,
i = 0;
input = JXG.Util.Base64._utf8_encode(input);
while (i &lt; input.length) {
chr1 = input.charCodeAt(i++);
chr2 = input.charCodeAt(i++);
chr3 = input.charCodeAt(i++);
enc1 = chr1 >> 2;
enc2 = ((chr1 & 3) &lt;&lt; 4) | (chr2 >> 4);
enc3 = ((chr2 & 15) &lt;&lt; 2) | (chr3 >> 6);
enc4 = chr3 & 63;
if (isNaN(chr2)) {
enc3 = enc4 = 64;
} else if (isNaN(chr3)) {
enc4 = 64;
}
output.push([this._keyStr.charAt(enc1),
this._keyStr.charAt(enc2),
this._keyStr.charAt(enc3),
this._keyStr.charAt(enc4)
].join(''));
}
return output.join('');
},
// public method for decoding
decode: function(input, utf8) {
var output = [],
chr1, chr2, chr3,
enc1, enc2, enc3, enc4,
i = 0;
input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");
while (i &lt; input.length) {
enc1 = this._keyStr.indexOf(input.charAt(i++));
enc2 = this._keyStr.indexOf(input.charAt(i++));
enc3 = this._keyStr.indexOf(input.charAt(i++));
enc4 = this._keyStr.indexOf(input.charAt(i++));
chr1 = (enc1 &lt;&lt; 2) | (enc2 >> 4);
chr2 = ((enc2 & 15) &lt;&lt; 4) | (enc3 >> 2);
chr3 = ((enc3 & 3) &lt;&lt; 6) | enc4;
output.push(String.fromCharCode(chr1));
if (enc3 != 64) {
output.push(String.fromCharCode(chr2));
}
if (enc4 != 64) {
output.push(String.fromCharCode(chr3));
}
}
output = output.join('');
if (utf8) {
output = JXG.Util.Base64._utf8_decode(output);
}
return output;
},
// private method for UTF-8 encoding
_utf8_encode: function(string) {
string = string.replace(/\r\n/g, "\n");
var utftext = "";
for (var n = 0; n &lt; string.length; n++) {
var c = string.charCodeAt(n);
if (c &lt; 128) {
utftext += String.fromCharCode(c);
} else if ((c > 127) && (c &lt; 2048)) {
utftext += String.fromCharCode((c >> 6) | 192);
utftext += String.fromCharCode((c & 63) | 128);
} else {
utftext += String.fromCharCode((c >> 12) | 224);
utftext += String.fromCharCode(((c >> 6) & 63) | 128);
utftext += String.fromCharCode((c & 63) | 128);
}
}
return utftext;
},
// private method for UTF-8 decoding
_utf8_decode: function(utftext) {
var string = [],
i = 0,
c = 0,
c2 = 0,
c3 = 0;
while (i &lt; utftext.length) {
c = utftext.charCodeAt(i);
if (c &lt; 128) {
string.push(String.fromCharCode(c));
i++;
} else if ((c > 191) && (c &lt; 224)) {
c2 = utftext.charCodeAt(i + 1);
string.push(String.fromCharCode(((c & 31) &lt;&lt; 6) | (c2 & 63)));
i += 2;
} else {
c2 = utftext.charCodeAt(i + 1);
c3 = utftext.charCodeAt(i + 2);
string.push(String.fromCharCode(((c & 15) &lt;&lt; 12) | ((c2 & 63) &lt;&lt; 6) | (c3 & 63)));
i += 3;
}
}
return string.join('');
},
_destrip: function(stripped, wrap) {
var lines = [],
lineno, i,
destripped = [];
if (wrap === null)
wrap = 76;
stripped.replace(/ /g, "");
lineno = stripped.length / wrap;
for (i = 0; i &lt; lineno; i++)
lines[i] = stripped.substr(i * wrap, wrap);
if (lineno != stripped.length / wrap)
lines[lines.length] = stripped.substr(lineno * wrap, stripped.length - (lineno * wrap));
for (i = 0; i &lt; lines.length; i++)
destripped.push(lines[i]);
return destripped.join('\n');
},
decodeAsArray: function(input) {
var dec = this.decode(input),
ar = [],
i;
for (i = 0; i &lt; dec.length; i++) {
ar[i] = dec.charCodeAt(i);
}
return ar;
},
decodeGEONExT: function(input) {
return decodeAsArray(destrip(input), false);
}
};
/**
* @private
*/
JXG.Util.asciiCharCodeAt = function(str, i) {
var c = str.charCodeAt(i);
if (c > 255) {
switch (c) {
case 8364:
c = 128;
break;
case 8218:
c = 130;
break;
case 402:
c = 131;
break;
case 8222:
c = 132;
break;
case 8230:
c = 133;
break;
case 8224:
c = 134;
break;
case 8225:
c = 135;
break;
case 710:
c = 136;
break;
case 8240:
c = 137;
break;
case 352:
c = 138;
break;
case 8249:
c = 139;
break;
case 338:
c = 140;
break;
case 381:
c = 142;
break;
case 8216:
c = 145;
break;
case 8217:
c = 146;
break;
case 8220:
c = 147;
break;
case 8221:
c = 148;
break;
case 8226:
c = 149;
break;
case 8211:
c = 150;
break;
case 8212:
c = 151;
break;
case 732:
c = 152;
break;
case 8482:
c = 153;
break;
case 353:
c = 154;
break;
case 8250:
c = 155;
break;
case 339:
c = 156;
break;
case 382:
c = 158;
break;
case 376:
c = 159;
break;
default:
break;
}
}
return c;
};
/**
* Decoding string into utf-8
* @param {String} string to decode
* @return {String} utf8 decoded string
*/
JXG.Util.utf8Decode = function(utftext) {
var string = [];
var i = 0;
var c = 0,
c1 = 0,
c2 = 0,
c3;
if (!JXG.exists(utftext)) return '';
while (i &lt; utftext.length) {
c = utftext.charCodeAt(i);
if (c &lt; 128) {
string.push(String.fromCharCode(c));
i++;
} else if ((c > 191) && (c &lt; 224)) {
c2 = utftext.charCodeAt(i + 1);
string.push(String.fromCharCode(((c & 31) &lt;&lt; 6) | (c2 & 63)));
i += 2;
} else {
c2 = utftext.charCodeAt(i + 1);
c3 = utftext.charCodeAt(i + 2);
string.push(String.fromCharCode(((c & 15) &lt;&lt; 12) | ((c2 & 63) &lt;&lt; 6) | (c3 & 63)));
i += 3;
}
}
return string.join('');
};
/**
* Generate a random uuid.
* http://www.broofa.com
* mailto:robert@broofa.com
*
* Copyright (c) 2010 Robert Kieffer
* Dual licensed under the MIT and GPL licenses.
*
* EXAMPLES:
* >>> Math.uuid()
* "92329D39-6F5C-4520-ABFC-AAB64544E172"
*/
JXG.Util.genUUID = function() {
// Private array of chars to use
var chars = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'.split(''),
uuid = new Array(36),
rnd = 0,
r;
for (var i = 0; i &lt; 36; i++) {
if (i == 8 || i == 13 || i == 18 || i == 23) {
uuid[i] = '-';
} else if (i == 14) {
uuid[i] = '4';
} else {
if (rnd &lt;= 0x02) rnd = 0x2000000 + (Math.random() * 0x1000000) | 0;
r = rnd & 0xf;
rnd = rnd >> 4;
uuid[i] = chars[(i == 19) ? (r & 0x3) | 0x8 : r];
}
}
return uuid.join('');
};
module.exports = JXG;
</code></pre>
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