LumeWeb
/
filer
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
filer/lib/zip.js/inflate.js

2139 lines
56 KiB
JavaScript
Raw Normal View History

Initial commit of zip.js lib
2014-03-25 15:11:47 +00:00
/*
Based on https://github.com/gildas-lormeau/zip.js/blob/master/WebContent/deflate.js
Copyright (c) 2013 Gildas Lormeau. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in
the documentation and/or other materials provided with the distribution.
3. The names of the authors may not be used to endorse or promote products
derived from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JCRAFT,
INC. OR ANY CONTRIBUTORS TO THIS SOFTWARE BE LIABLE FOR ANY DIRECT, INDIRECT,
INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
* This program is based on JZlib 1.0.2 ymnk, JCraft,Inc.
* JZlib is based on zlib-1.1.3, so all credit should go authors
* Jean-loup Gailly(jloup@gzip.org) and Mark Adler(madler@alumni.caltech.edu)
* and contributors of zlib.
*/
define(function(require) {
// Global
var MAX_BITS = 15;
var Z_OK = 0;
var Z_STREAM_END = 1;
var Z_NEED_DICT = 2;
var Z_STREAM_ERROR = -2;
var Z_DATA_ERROR = -3;
var Z_MEM_ERROR = -4;
var Z_BUF_ERROR = -5;
var inflate_mask = [ 0x00000000, 0x00000001, 0x00000003, 0x00000007, 0x0000000f, 0x0000001f, 0x0000003f, 0x0000007f, 0x000000ff, 0x000001ff, 0x000003ff,
0x000007ff, 0x00000fff, 0x00001fff, 0x00003fff, 0x00007fff, 0x0000ffff ];
var MANY = 1440;
// JZlib version : "1.0.2"
var Z_NO_FLUSH = 0;
var Z_FINISH = 4;
// InfTree
var fixed_bl = 9;
var fixed_bd = 5;
var fixed_tl = [ 96, 7, 256, 0, 8, 80, 0, 8, 16, 84, 8, 115, 82, 7, 31, 0, 8, 112, 0, 8, 48, 0, 9, 192, 80, 7, 10, 0, 8, 96, 0, 8, 32, 0, 9, 160, 0, 8, 0,
0, 8, 128, 0, 8, 64, 0, 9, 224, 80, 7, 6, 0, 8, 88, 0, 8, 24, 0, 9, 144, 83, 7, 59, 0, 8, 120, 0, 8, 56, 0, 9, 208, 81, 7, 17, 0, 8, 104, 0, 8, 40,
0, 9, 176, 0, 8, 8, 0, 8, 136, 0, 8, 72, 0, 9, 240, 80, 7, 4, 0, 8, 84, 0, 8, 20, 85, 8, 227, 83, 7, 43, 0, 8, 116, 0, 8, 52, 0, 9, 200, 81, 7, 13,
0, 8, 100, 0, 8, 36, 0, 9, 168, 0, 8, 4, 0, 8, 132, 0, 8, 68, 0, 9, 232, 80, 7, 8, 0, 8, 92, 0, 8, 28, 0, 9, 152, 84, 7, 83, 0, 8, 124, 0, 8, 60,
0, 9, 216, 82, 7, 23, 0, 8, 108, 0, 8, 44, 0, 9, 184, 0, 8, 12, 0, 8, 140, 0, 8, 76, 0, 9, 248, 80, 7, 3, 0, 8, 82, 0, 8, 18, 85, 8, 163, 83, 7,
35, 0, 8, 114, 0, 8, 50, 0, 9, 196, 81, 7, 11, 0, 8, 98, 0, 8, 34, 0, 9, 164, 0, 8, 2, 0, 8, 130, 0, 8, 66, 0, 9, 228, 80, 7, 7, 0, 8, 90, 0, 8,
26, 0, 9, 148, 84, 7, 67, 0, 8, 122, 0, 8, 58, 0, 9, 212, 82, 7, 19, 0, 8, 106, 0, 8, 42, 0, 9, 180, 0, 8, 10, 0, 8, 138, 0, 8, 74, 0, 9, 244, 80,
7, 5, 0, 8, 86, 0, 8, 22, 192, 8, 0, 83, 7, 51, 0, 8, 118, 0, 8, 54, 0, 9, 204, 81, 7, 15, 0, 8, 102, 0, 8, 38, 0, 9, 172, 0, 8, 6, 0, 8, 134, 0,
8, 70, 0, 9, 236, 80, 7, 9, 0, 8, 94, 0, 8, 30, 0, 9, 156, 84, 7, 99, 0, 8, 126, 0, 8, 62, 0, 9, 220, 82, 7, 27, 0, 8, 110, 0, 8, 46, 0, 9, 188, 0,
8, 14, 0, 8, 142, 0, 8, 78, 0, 9, 252, 96, 7, 256, 0, 8, 81, 0, 8, 17, 85, 8, 131, 82, 7, 31, 0, 8, 113, 0, 8, 49, 0, 9, 194, 80, 7, 10, 0, 8, 97,
0, 8, 33, 0, 9, 162, 0, 8, 1, 0, 8, 129, 0, 8, 65, 0, 9, 226, 80, 7, 6, 0, 8, 89, 0, 8, 25, 0, 9, 146, 83, 7, 59, 0, 8, 121, 0, 8, 57, 0, 9, 210,
81, 7, 17, 0, 8, 105, 0, 8, 41, 0, 9, 178, 0, 8, 9, 0, 8, 137, 0, 8, 73, 0, 9, 242, 80, 7, 4, 0, 8, 85, 0, 8, 21, 80, 8, 258, 83, 7, 43, 0, 8, 117,
0, 8, 53, 0, 9, 202, 81, 7, 13, 0, 8, 101, 0, 8, 37, 0, 9, 170, 0, 8, 5, 0, 8, 133, 0, 8, 69, 0, 9, 234, 80, 7, 8, 0, 8, 93, 0, 8, 29, 0, 9, 154,
84, 7, 83, 0, 8, 125, 0, 8, 61, 0, 9, 218, 82, 7, 23, 0, 8, 109, 0, 8, 45, 0, 9, 186, 0, 8, 13, 0, 8, 141, 0, 8, 77, 0, 9, 250, 80, 7, 3, 0, 8, 83,
0, 8, 19, 85, 8, 195, 83, 7, 35, 0, 8, 115, 0, 8, 51, 0, 9, 198, 81, 7, 11, 0, 8, 99, 0, 8, 35, 0, 9, 166, 0, 8, 3, 0, 8, 131, 0, 8, 67, 0, 9, 230,
80, 7, 7, 0, 8, 91, 0, 8, 27, 0, 9, 150, 84, 7, 67, 0, 8, 123, 0, 8, 59, 0, 9, 214, 82, 7, 19, 0, 8, 107, 0, 8, 43, 0, 9, 182, 0, 8, 11, 0, 8, 139,
0, 8, 75, 0, 9, 246, 80, 7, 5, 0, 8, 87, 0, 8, 23, 192, 8, 0, 83, 7, 51, 0, 8, 119, 0, 8, 55, 0, 9, 206, 81, 7, 15, 0, 8, 103, 0, 8, 39, 0, 9, 174,
0, 8, 7, 0, 8, 135, 0, 8, 71, 0, 9, 238, 80, 7, 9, 0, 8, 95, 0, 8, 31, 0, 9, 158, 84, 7, 99, 0, 8, 127, 0, 8, 63, 0, 9, 222, 82, 7, 27, 0, 8, 111,
0, 8, 47, 0, 9, 190, 0, 8, 15, 0, 8, 143, 0, 8, 79, 0, 9, 254, 96, 7, 256, 0, 8, 80, 0, 8, 16, 84, 8, 115, 82, 7, 31, 0, 8, 112, 0, 8, 48, 0, 9,
193, 80, 7, 10, 0, 8, 96, 0, 8, 32, 0, 9, 161, 0, 8, 0, 0, 8, 128, 0, 8, 64, 0, 9, 225, 80, 7, 6, 0, 8, 88, 0, 8, 24, 0, 9, 145, 83, 7, 59, 0, 8,
120, 0, 8, 56, 0, 9, 209, 81, 7, 17, 0, 8, 104, 0, 8, 40, 0, 9, 177, 0, 8, 8, 0, 8, 136, 0, 8, 72, 0, 9, 241, 80, 7, 4, 0, 8, 84, 0, 8, 20, 85, 8,
227, 83, 7, 43, 0, 8, 116, 0, 8, 52, 0, 9, 201, 81, 7, 13, 0, 8, 100, 0, 8, 36, 0, 9, 169, 0, 8, 4, 0, 8, 132, 0, 8, 68, 0, 9, 233, 80, 7, 8, 0, 8,
92, 0, 8, 28, 0, 9, 153, 84, 7, 83, 0, 8, 124, 0, 8, 60, 0, 9, 217, 82, 7, 23, 0, 8, 108, 0, 8, 44, 0, 9, 185, 0, 8, 12, 0, 8, 140, 0, 8, 76, 0, 9,
249, 80, 7, 3, 0, 8, 82, 0, 8, 18, 85, 8, 163, 83, 7, 35, 0, 8, 114, 0, 8, 50, 0, 9, 197, 81, 7, 11, 0, 8, 98, 0, 8, 34, 0, 9, 165, 0, 8, 2, 0, 8,
130, 0, 8, 66, 0, 9, 229, 80, 7, 7, 0, 8, 90, 0, 8, 26, 0, 9, 149, 84, 7, 67, 0, 8, 122, 0, 8, 58, 0, 9, 213, 82, 7, 19, 0, 8, 106, 0, 8, 42, 0, 9,
181, 0, 8, 10, 0, 8, 138, 0, 8, 74, 0, 9, 245, 80, 7, 5, 0, 8, 86, 0, 8, 22, 192, 8, 0, 83, 7, 51, 0, 8, 118, 0, 8, 54, 0, 9, 205, 81, 7, 15, 0, 8,
102, 0, 8, 38, 0, 9, 173, 0, 8, 6, 0, 8, 134, 0, 8, 70, 0, 9, 237, 80, 7, 9, 0, 8, 94, 0, 8, 30, 0, 9, 157, 84, 7, 99, 0, 8, 126, 0, 8, 62, 0, 9,
221, 82, 7, 27, 0, 8, 110, 0, 8, 46, 0, 9, 189, 0, 8, 14, 0, 8, 142, 0, 8, 78, 0, 9, 253, 96, 7, 256, 0, 8, 81, 0, 8, 17, 85, 8, 131, 82, 7, 31, 0,
8, 113, 0, 8, 49, 0, 9, 195, 80, 7, 10, 0, 8, 97, 0, 8, 33, 0, 9, 163, 0, 8, 1, 0, 8, 129, 0, 8, 65, 0, 9, 227, 80, 7, 6, 0, 8, 89, 0, 8, 25, 0, 9,
147, 83, 7, 59, 0, 8, 121, 0, 8, 57, 0, 9, 211, 81, 7, 17, 0, 8, 105, 0, 8, 41, 0, 9, 179, 0, 8, 9, 0, 8, 137, 0, 8, 73, 0, 9, 243, 80, 7, 4, 0, 8,
85, 0, 8, 21, 80, 8, 258, 83, 7, 43, 0, 8, 117, 0, 8, 53, 0, 9, 203, 81, 7, 13, 0, 8, 101, 0, 8, 37, 0, 9, 171, 0, 8, 5, 0, 8, 133, 0, 8, 69, 0, 9,
235, 80, 7, 8, 0, 8, 93, 0, 8, 29, 0, 9, 155, 84, 7, 83, 0, 8, 125, 0, 8, 61, 0, 9, 219, 82, 7, 23, 0, 8, 109, 0, 8, 45, 0, 9, 187, 0, 8, 13, 0, 8,
141, 0, 8, 77, 0, 9, 251, 80, 7, 3, 0, 8, 83, 0, 8, 19, 85, 8, 195, 83, 7, 35, 0, 8, 115, 0, 8, 51, 0, 9, 199, 81, 7, 11, 0, 8, 99, 0, 8, 35, 0, 9,
167, 0, 8, 3, 0, 8, 131, 0, 8, 67, 0, 9, 231, 80, 7, 7, 0, 8, 91, 0, 8, 27, 0, 9, 151, 84, 7, 67, 0, 8, 123, 0, 8, 59, 0, 9, 215, 82, 7, 19, 0, 8,
107, 0, 8, 43, 0, 9, 183, 0, 8, 11, 0, 8, 139, 0, 8, 75, 0, 9, 247, 80, 7, 5, 0, 8, 87, 0, 8, 23, 192, 8, 0, 83, 7, 51, 0, 8, 119, 0, 8, 55, 0, 9,
207, 81, 7, 15, 0, 8, 103, 0, 8, 39, 0, 9, 175, 0, 8, 7, 0, 8, 135, 0, 8, 71, 0, 9, 239, 80, 7, 9, 0, 8, 95, 0, 8, 31, 0, 9, 159, 84, 7, 99, 0, 8,
127, 0, 8, 63, 0, 9, 223, 82, 7, 27, 0, 8, 111, 0, 8, 47, 0, 9, 191, 0, 8, 15, 0, 8, 143, 0, 8, 79, 0, 9, 255 ];
var fixed_td = [ 80, 5, 1, 87, 5, 257, 83, 5, 17, 91, 5, 4097, 81, 5, 5, 89, 5, 1025, 85, 5, 65, 93, 5, 16385, 80, 5, 3, 88, 5, 513, 84, 5, 33, 92, 5,
8193, 82, 5, 9, 90, 5, 2049, 86, 5, 129, 192, 5, 24577, 80, 5, 2, 87, 5, 385, 83, 5, 25, 91, 5, 6145, 81, 5, 7, 89, 5, 1537, 85, 5, 97, 93, 5,
24577, 80, 5, 4, 88, 5, 769, 84, 5, 49, 92, 5, 12289, 82, 5, 13, 90, 5, 3073, 86, 5, 193, 192, 5, 24577 ];
// Tables for deflate from PKZIP's appnote.txt.
var cplens = [ // Copy lengths for literal codes 257..285
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 ];
// see note #13 above about 258
var cplext = [ // Extra bits for literal codes 257..285
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, 112, 112 // 112==invalid
];
var cpdist = [ // Copy offsets for distance codes 0..29
1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, 49, 65, 97, 129, 193, 257, 385, 513, 769, 1025, 1537, 2049, 3073, 4097, 6145, 8193, 12289, 16385, 24577 ];
var cpdext = [ // Extra bits for distance codes
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 ];
// If BMAX needs to be larger than 16, then h and x[] should be uLong.
var BMAX = 15; // maximum bit length of any code
function InfTree() {
var that = this;
var hn; // hufts used in space
var v; // work area for huft_build
var c; // bit length count table
var r; // table entry for structure assignment
var u; // table stack
var x; // bit offsets, then code stack
function huft_build(b, // code lengths in bits (all assumed <=
// BMAX)
bindex, n, // number of codes (assumed <= 288)
s, // number of simple-valued codes (0..s-1)
d, // list of base values for non-simple codes
e, // list of extra bits for non-simple codes
t, // result: starting table
m, // maximum lookup bits, returns actual
hp,// space for trees
hn,// hufts used in space
v // working area: values in order of bit length
) {
// Given a list of code lengths and a maximum table size, make a set of
// tables to decode that set of codes. Return Z_OK on success,
// Z_BUF_ERROR
// if the given code set is incomplete (the tables are still built in
// this
// case), Z_DATA_ERROR if the input is invalid (an over-subscribed set
// of
// lengths), or Z_MEM_ERROR if not enough memory.
var a; // counter for codes of length k
var f; // i repeats in table every f entries
var g; // maximum code length
var h; // table level
var i; // counter, current code
var j; // counter
var k; // number of bits in current code
var l; // bits per table (returned in m)
var mask; // (1 << w) - 1, to avoid cc -O bug on HP
var p; // pointer into c[], b[], or v[]
var q; // points to current table
var w; // bits before this table == (l * h)
var xp; // pointer into x
var y; // number of dummy codes added
var z; // number of entries in current table
// Generate counts for each bit length
p = 0;
i = n;
do {
c[b[bindex + p]]++;
p++;
i--; // assume all entries <= BMAX
} while (i !== 0);
if (c[0] == n) { // null input--all zero length codes
t[0] = -1;
m[0] = 0;
return Z_OK;
}
// Find minimum and maximum length, bound *m by those
l = m[0];
for (j = 1; j <= BMAX; j++)
if (c[j] !== 0)
break;
k = j; // minimum code length
if (l < j) {
l = j;
}
for (i = BMAX; i !== 0; i--) {
if (c[i] !== 0)
break;
}
g = i; // maximum code length
if (l > i) {
l = i;
}
m[0] = l;
// Adjust last length count to fill out codes, if needed
for (y = 1 << j; j < i; j++, y <<= 1) {
if ((y -= c[j]) < 0) {
return Z_DATA_ERROR;
}
}
if ((y -= c[i]) < 0) {
return Z_DATA_ERROR;
}
c[i] += y;
// Generate starting offsets into the value table for each length
x[1] = j = 0;
p = 1;
xp = 2;
while (--i !== 0) { // note that i == g from above
x[xp] = (j += c[p]);
xp++;
p++;
}
// Make a table of values in order of bit lengths
i = 0;
p = 0;
do {
if ((j = b[bindex + p]) !== 0) {
v[x[j]++] = i;
}
p++;
} while (++i < n);
n = x[g]; // set n to length of v
// Generate the Huffman codes and for each, make the table entries
x[0] = i = 0; // first Huffman code is zero
p = 0; // grab values in bit order
h = -1; // no tables yet--level -1
w = -l; // bits decoded == (l * h)
u[0] = 0; // just to keep compilers happy
q = 0; // ditto
z = 0; // ditto
// go through the bit lengths (k already is bits in shortest code)
for (; k <= g; k++) {
a = c[k];
while (a-- !== 0) {
// here i is the Huffman code of length k bits for value *p
// make tables up to required level
while (k > w + l) {
h++;
w += l; // previous table always l bits
// compute minimum size table less than or equal to l bits
z = g - w;
z = (z > l) ? l : z; // table size upper limit
if ((f = 1 << (j = k - w)) > a + 1) { // try a k-w bit table
// too few codes for
// k-w bit table
f -= a + 1; // deduct codes from patterns left
xp = k;
if (j < z) {
while (++j < z) { // try smaller tables up to z bits
if ((f <<= 1) <= c[++xp])
break; // enough codes to use up j bits
f -= c[xp]; // else deduct codes from patterns
}
}
}
z = 1 << j; // table entries for j-bit table
// allocate new table
if (hn[0] + z > MANY) { // (note: doesn't matter for fixed)
return Z_DATA_ERROR; // overflow of MANY
}
u[h] = q = /* hp+ */hn[0]; // DEBUG
hn[0] += z;
// connect to last table, if there is one
if (h !== 0) {
x[h] = i; // save pattern for backing up
r[0] = /* (byte) */j; // bits in this table
r[1] = /* (byte) */l; // bits to dump before this table
j = i >>> (w - l);
r[2] = /* (int) */(q - u[h - 1] - j); // offset to this table
hp.set(r, (u[h - 1] + j) * 3);
// to
// last
// table
} else {
t[0] = q; // first table is returned result
}
}
// set up table entry in r
r[1] = /* (byte) */(k - w);
if (p >= n) {
r[0] = 128 + 64; // out of values--invalid code
} else if (v[p] < s) {
r[0] = /* (byte) */(v[p] < 256 ? 0 : 32 + 64); // 256 is
// end-of-block
r[2] = v[p++]; // simple code is just the value
} else {
r[0] = /* (byte) */(e[v[p] - s] + 16 + 64); // non-simple--look
// up in lists
r[2] = d[v[p++] - s];
}
// fill code-like entries with r
f = 1 << (k - w);
for (j = i >>> w; j < z; j += f) {
hp.set(r, (q + j) * 3);
}
// backwards increment the k-bit code i
for (j = 1 << (k - 1); (i & j) !== 0; j >>>= 1) {
i ^= j;
}
i ^= j;
// backup over finished tables
mask = (1 << w) - 1; // needed on HP, cc -O bug
while ((i & mask) != x[h]) {
h--; // don't need to update q
w -= l;
mask = (1 << w) - 1;
}
}
}
// Return Z_BUF_ERROR if we were given an incomplete table
return y !== 0 && g != 1 ? Z_BUF_ERROR : Z_OK;
}
function initWorkArea(vsize) {
var i;
if (!hn) {
hn = []; // []; //new Array(1);
v = []; // new Array(vsize);
c = new Int32Array(BMAX + 1); // new Array(BMAX + 1);
r = []; // new Array(3);
u = new Int32Array(BMAX); // new Array(BMAX);
x = new Int32Array(BMAX + 1); // new Array(BMAX + 1);
}
if (v.length < vsize) {
v = []; // new Array(vsize);
}
for (i = 0; i < vsize; i++) {
v[i] = 0;
}
for (i = 0; i < BMAX + 1; i++) {
c[i] = 0;
}
for (i = 0; i < 3; i++) {
r[i] = 0;
}
// for(int i=0; i<BMAX; i++){u[i]=0;}
u.set(c.subarray(0, BMAX), 0);
// for(int i=0; i<BMAX+1; i++){x[i]=0;}
x.set(c.subarray(0, BMAX + 1), 0);
}
that.inflate_trees_bits = function(c, // 19 code lengths
bb, // bits tree desired/actual depth
tb, // bits tree result
hp, // space for trees
z // for messages
) {
var result;
initWorkArea(19);
hn[0] = 0;
result = huft_build(c, 0, 19, 19, null, null, tb, bb, hp, hn, v);
if (result == Z_DATA_ERROR) {
z.msg = "oversubscribed dynamic bit lengths tree";
} else if (result == Z_BUF_ERROR || bb[0] === 0) {
z.msg = "incomplete dynamic bit lengths tree";
result = Z_DATA_ERROR;
}
return result;
};
that.inflate_trees_dynamic = function(nl, // number of literal/length codes
nd, // number of distance codes
c, // that many (total) code lengths
bl, // literal desired/actual bit depth
bd, // distance desired/actual bit depth
tl, // literal/length tree result
td, // distance tree result
hp, // space for trees
z // for messages
) {
var result;
// build literal/length tree
initWorkArea(288);
hn[0] = 0;
result = huft_build(c, 0, nl, 257, cplens, cplext, tl, bl, hp, hn, v);
if (result != Z_OK || bl[0] === 0) {
if (result == Z_DATA_ERROR) {
z.msg = "oversubscribed literal/length tree";
} else if (result != Z_MEM_ERROR) {
z.msg = "incomplete literal/length tree";
result = Z_DATA_ERROR;
}
return result;
}
// build distance tree
initWorkArea(288);
result = huft_build(c, nl, nd, 0, cpdist, cpdext, td, bd, hp, hn, v);
if (result != Z_OK || (bd[0] === 0 && nl > 257)) {
if (result == Z_DATA_ERROR) {
z.msg = "oversubscribed distance tree";
} else if (result == Z_BUF_ERROR) {
z.msg = "incomplete distance tree";
result = Z_DATA_ERROR;
} else if (result != Z_MEM_ERROR) {
z.msg = "empty distance tree with lengths";
result = Z_DATA_ERROR;
}
return result;
}
return Z_OK;
};
}
InfTree.inflate_trees_fixed = function(bl, // literal desired/actual bit depth
bd, // distance desired/actual bit depth
tl,// literal/length tree result
td// distance tree result
) {
bl[0] = fixed_bl;
bd[0] = fixed_bd;
tl[0] = fixed_tl;
td[0] = fixed_td;
return Z_OK;
};
// InfCodes
// waiting for "i:"=input,
// "o:"=output,
// "x:"=nothing
var START = 0; // x: set up for LEN
var LEN = 1; // i: get length/literal/eob next
var LENEXT = 2; // i: getting length extra (have base)
var DIST = 3; // i: get distance next
var DISTEXT = 4;// i: getting distance extra
var COPY = 5; // o: copying bytes in window, waiting
// for space
var LIT = 6; // o: got literal, waiting for output
// space
var WASH = 7; // o: got eob, possibly still output
// waiting
var END = 8; // x: got eob and all data flushed
var BADCODE = 9;// x: got error
function InfCodes() {
var that = this;
var mode; // current inflate_codes mode
// mode dependent information
var len = 0;
var tree; // pointer into tree
var tree_index = 0;
var need = 0; // bits needed
var lit = 0;
// if EXT or COPY, where and how much
var get = 0; // bits to get for extra
var dist = 0; // distance back to copy from
var lbits = 0; // ltree bits decoded per branch
var dbits = 0; // dtree bits decoder per branch
var ltree; // literal/length/eob tree
var ltree_index = 0; // literal/length/eob tree
var dtree; // distance tree
var dtree_index = 0; // distance tree
// Called with number of bytes left to write in window at least 258
// (the maximum string length) and number of input bytes available
// at least ten. The ten bytes are six bytes for the longest length/
// distance pair plus four bytes for overloading the bit buffer.
function inflate_fast(bl, bd, tl, tl_index, td, td_index, s, z) {
var t; // temporary pointer
var tp; // temporary pointer
var tp_index; // temporary pointer
var e; // extra bits or operation
var b; // bit buffer
var k; // bits in bit buffer
var p; // input data pointer
var n; // bytes available there
var q; // output window write pointer
var m; // bytes to end of window or read pointer
var ml; // mask for literal/length tree
var md; // mask for distance tree
var c; // bytes to copy
var d; // distance back to copy from
var r; // copy source pointer
var tp_index_t_3; // (tp_index+t)*3
// load input, output, bit values
p = z.next_in_index;
n = z.avail_in;
b = s.bitb;
k = s.bitk;
q = s.write;
m = q < s.read ? s.read - q - 1 : s.end - q;
// initialize masks
ml = inflate_mask[bl];
md = inflate_mask[bd];
// do until not enough input or output space for fast loop
do { // assume called with m >= 258 && n >= 10
// get literal/length code
while (k < (20)) { // max bits for literal/length code
n--;
b |= (z.read_byte(p++) & 0xff) << k;
k += 8;
}
t = b & ml;
tp = tl;
tp_index = tl_index;
tp_index_t_3 = (tp_index + t) * 3;
if ((e = tp[tp_index_t_3]) === 0) {
b >>= (tp[tp_index_t_3 + 1]);
k -= (tp[tp_index_t_3 + 1]);
s.window[q++] = /* (byte) */tp[tp_index_t_3 + 2];
m--;
continue;
}
do {
b >>= (tp[tp_index_t_3 + 1]);
k -= (tp[tp_index_t_3 + 1]);
if ((e & 16) !== 0) {
e &= 15;
c = tp[tp_index_t_3 + 2] + (/* (int) */b & inflate_mask[e]);
b >>= e;
k -= e;
// decode distance base of block to copy
while (k < (15)) { // max bits for distance code
n--;
b |= (z.read_byte(p++) & 0xff) << k;
k += 8;
}
t = b & md;
tp = td;
tp_index = td_index;
tp_index_t_3 = (tp_index + t) * 3;
e = tp[tp_index_t_3];
do {
b >>= (tp[tp_index_t_3 + 1]);
k -= (tp[tp_index_t_3 + 1]);
if ((e & 16) !== 0) {
// get extra bits to add to distance base
e &= 15;
while (k < (e)) { // get extra bits (up to 13)
n--;
b |= (z.read_byte(p++) & 0xff) << k;
k += 8;
}
d = tp[tp_index_t_3 + 2] + (b & inflate_mask[e]);
b >>= (e);
k -= (e);
// do the copy
m -= c;
if (q >= d) { // offset before dest
// just copy
r = q - d;
if (q - r > 0 && 2 > (q - r)) {
s.window[q++] = s.window[r++]; // minimum
// count is
// three,
s.window[q++] = s.window[r++]; // so unroll
// loop a
// little
c -= 2;
} else {
s.window.set(s.window.subarray(r, r + 2), q);
q += 2;
r += 2;
c -= 2;
}
} else { // else offset after destination
r = q - d;
do {
r += s.end; // force pointer in window
} while (r < 0); // covers invalid distances
e = s.end - r;
if (c > e) { // if source crosses,
c -= e; // wrapped copy
if (q - r > 0 && e > (q - r)) {
do {
s.window[q++] = s.window[r++];
} while (--e !== 0);
} else {
s.window.set(s.window.subarray(r, r + e), q);
q += e;
r += e;
e = 0;
}
r = 0; // copy rest from start of window
}
}
// copy all or what's left
if (q - r > 0 && c > (q - r)) {
do {
s.window[q++] = s.window[r++];
} while (--c !== 0);
} else {
s.window.set(s.window.subarray(r, r + c), q);
q += c;
r += c;
c = 0;
}
break;
} else if ((e & 64) === 0) {
t += tp[tp_index_t_3 + 2];
t += (b & inflate_mask[e]);
tp_index_t_3 = (tp_index + t) * 3;
e = tp[tp_index_t_3];
} else {
z.msg = "invalid distance code";
c = z.avail_in - n;
c = (k >> 3) < c ? k >> 3 : c;
n += c;
p -= c;
k -= c << 3;
s.bitb = b;
s.bitk = k;
z.avail_in = n;
z.total_in += p - z.next_in_index;
z.next_in_index = p;
s.write = q;
return Z_DATA_ERROR;
}
} while (true);
break;
}
if ((e & 64) === 0) {
t += tp[tp_index_t_3 + 2];
t += (b & inflate_mask[e]);
tp_index_t_3 = (tp_index + t) * 3;
if ((e = tp[tp_index_t_3]) === 0) {
b >>= (tp[tp_index_t_3 + 1]);
k -= (tp[tp_index_t_3 + 1]);
s.window[q++] = /* (byte) */tp[tp_index_t_3 + 2];
m--;
break;
}
} else if ((e & 32) !== 0) {
c = z.avail_in - n;
c = (k >> 3) < c ? k >> 3 : c;
n += c;
p -= c;
k -= c << 3;
s.bitb = b;
s.bitk = k;
z.avail_in = n;
z.total_in += p - z.next_in_index;
z.next_in_index = p;
s.write = q;
return Z_STREAM_END;
} else {
z.msg = "invalid literal/length code";
c = z.avail_in - n;
c = (k >> 3) < c ? k >> 3 : c;
n += c;
p -= c;
k -= c << 3;
s.bitb = b;
s.bitk = k;
z.avail_in = n;
z.total_in += p - z.next_in_index;
z.next_in_index = p;
s.write = q;
return Z_DATA_ERROR;
}
} while (true);
} while (m >= 258 && n >= 10);
// not enough input or output--restore pointers and return
c = z.avail_in - n;
c = (k >> 3) < c ? k >> 3 : c;
n += c;
p -= c;
k -= c << 3;
s.bitb = b;
s.bitk = k;
z.avail_in = n;
z.total_in += p - z.next_in_index;
z.next_in_index = p;
s.write = q;
return Z_OK;
}
that.init = function(bl, bd, tl, tl_index, td, td_index) {
mode = START;
lbits = /* (byte) */bl;
dbits = /* (byte) */bd;
ltree = tl;
ltree_index = tl_index;
dtree = td;
dtree_index = td_index;
tree = null;
};
that.proc = function(s, z, r) {
var j; // temporary storage
var tindex; // temporary pointer
var e; // extra bits or operation
var b = 0; // bit buffer
var k = 0; // bits in bit buffer
var p = 0; // input data pointer
var n; // bytes available there
var q; // output window write pointer
var m; // bytes to end of window or read pointer
var f; // pointer to copy strings from
// copy input/output information to locals (UPDATE macro restores)
p = z.next_in_index;
n = z.avail_in;
b = s.bitb;
k = s.bitk;
q = s.write;
m = q < s.read ? s.read - q - 1 : s.end - q;
// process input and output based on current state
while (true) {
switch (mode) {
// waiting for "i:"=input, "o:"=output, "x:"=nothing
case START: // x: set up for LEN
if (m >= 258 && n >= 10) {
s.bitb = b;
s.bitk = k;
z.avail_in = n;
z.total_in += p - z.next_in_index;
z.next_in_index = p;
s.write = q;
r = inflate_fast(lbits, dbits, ltree, ltree_index, dtree, dtree_index, s, z);
p = z.next_in_index;
n = z.avail_in;
b = s.bitb;
k = s.bitk;
q = s.write;
m = q < s.read ? s.read - q - 1 : s.end - q;
if (r != Z_OK) {
mode = r == Z_STREAM_END ? WASH : BADCODE;
break;
}
}
need = lbits;
tree = ltree;
tree_index = ltree_index;
mode = LEN;
case LEN: // i: get length/literal/eob next
j = need;
while (k < (j)) {
if (n !== 0)
r = Z_OK;
else {
s.bitb = b;
s.bitk = k;
z.avail_in = n;
z.total_in += p - z.next_in_index;
z.next_in_index = p;
s.write = q;
return s.inflate_flush(z, r);
}
n--;
b |= (z.read_byte(p++) & 0xff) << k;
k += 8;
}
tindex = (tree_index + (b & inflate_mask[j])) * 3;
b >>>= (tree[tindex + 1]);
k -= (tree[tindex + 1]);
e = tree[tindex];
if (e === 0) { // literal
lit = tree[tindex + 2];
mode = LIT;
break;
}
if ((e & 16) !== 0) { // length
get = e & 15;
len = tree[tindex + 2];
mode = LENEXT;
break;
}
if ((e & 64) === 0) { // next table
need = e;
tree_index = tindex / 3 + tree[tindex + 2];
break;
}
if ((e & 32) !== 0) { // end of block
mode = WASH;
break;
}
mode = BADCODE; // invalid code
z.msg = "invalid literal/length code";
r = Z_DATA_ERROR;
s.bitb = b;
s.bitk = k;
z.avail_in = n;
z.total_in += p - z.next_in_index;
z.next_in_index = p;
s.write = q;
return s.inflate_flush(z, r);
case LENEXT: // i: getting length extra (have base)
j = get;
while (k < (j)) {
if (n !== 0)
r = Z_OK;
else {
s.bitb = b;
s.bitk = k;
z.avail_in = n;
z.total_in += p - z.next_in_index;
z.next_in_index = p;
s.write = q;
return s.inflate_flush(z, r);
}
n--;
b |= (z.read_byte(p++) & 0xff) << k;
k += 8;
}
len += (b & inflate_mask[j]);
b >>= j;
k -= j;
need = dbits;
tree = dtree;
tree_index = dtree_index;
mode = DIST;
case DIST: // i: get distance next
j = need;
while (k < (j)) {
if (n !== 0)
r = Z_OK;
else {
s.bitb = b;
s.bitk = k;
z.avail_in = n;
z.total_in += p - z.next_in_index;
z.next_in_index = p;
s.write = q;
return s.inflate_flush(z, r);
}
n--;
b |= (z.read_byte(p++) & 0xff) << k;
k += 8;
}
tindex = (tree_index + (b & inflate_mask[j])) * 3;
b >>= tree[tindex + 1];
k -= tree[tindex + 1];
e = (tree[tindex]);
if ((e & 16) !== 0) { // distance
get = e & 15;
dist = tree[tindex + 2];
mode = DISTEXT;
break;
}
if ((e & 64) === 0) { // next table
need = e;
tree_index = tindex / 3 + tree[tindex + 2];
break;
}
mode = BADCODE; // invalid code
z.msg = "invalid distance code";
r = Z_DATA_ERROR;
s.bitb = b;
s.bitk = k;
z.avail_in = n;
z.total_in += p - z.next_in_index;
z.next_in_index = p;
s.write = q;
return s.inflate_flush(z, r);
case DISTEXT: // i: getting distance extra
j = get;
while (k < (j)) {
if (n !== 0)
r = Z_OK;
else {
s.bitb = b;
s.bitk = k;
z.avail_in = n;
z.total_in += p - z.next_in_index;
z.next_in_index = p;
s.write = q;
return s.inflate_flush(z, r);
}
n--;
b |= (z.read_byte(p++) & 0xff) << k;
k += 8;
}
dist += (b & inflate_mask[j]);
b >>= j;
k -= j;
mode = COPY;
case COPY: // o: copying bytes in window, waiting for space
f = q - dist;
while (f < 0) { // modulo window size-"while" instead
f += s.end; // of "if" handles invalid distances
}
while (len !== 0) {
if (m === 0) {
if (q == s.end && s.read !== 0) {
q = 0;
m = q < s.read ? s.read - q - 1 : s.end - q;
}
if (m === 0) {
s.write = q;
r = s.inflate_flush(z, r);
q = s.write;
m = q < s.read ? s.read - q - 1 : s.end - q;
if (q == s.end && s.read !== 0) {
q = 0;
m = q < s.read ? s.read - q - 1 : s.end - q;
}
if (m === 0) {
s.bitb = b;
s.bitk = k;
z.avail_in = n;
z.total_in += p - z.next_in_index;
z.next_in_index = p;
s.write = q;
return s.inflate_flush(z, r);
}
}
}
s.window[q++] = s.window[f++];
m--;
if (f == s.end)
f = 0;
len--;
}
mode = START;
break;
case LIT: // o: got literal, waiting for output space
if (m === 0) {
if (q == s.end && s.read !== 0) {
q = 0;
m = q < s.read ? s.read - q - 1 : s.end - q;
}
if (m === 0) {
s.write = q;
r = s.inflate_flush(z, r);
q = s.write;
m = q < s.read ? s.read - q - 1 : s.end - q;
if (q == s.end && s.read !== 0) {
q = 0;
m = q < s.read ? s.read - q - 1 : s.end - q;
}
if (m === 0) {
s.bitb = b;
s.bitk = k;
z.avail_in = n;
z.total_in += p - z.next_in_index;
z.next_in_index = p;
s.write = q;
return s.inflate_flush(z, r);
}
}
}
r = Z_OK;
s.window[q++] = /* (byte) */lit;
m--;
mode = START;
break;
case WASH: // o: got eob, possibly more output
if (k > 7) { // return unused byte, if any
k -= 8;
n++;
p--; // can always return one
}
s.write = q;
r = s.inflate_flush(z, r);
q = s.write;
m = q < s.read ? s.read - q - 1 : s.end - q;
if (s.read != s.write) {
s.bitb = b;
s.bitk = k;
z.avail_in = n;
z.total_in += p - z.next_in_index;
z.next_in_index = p;
s.write = q;
return s.inflate_flush(z, r);
}
mode = END;
case END:
r = Z_STREAM_END;
s.bitb = b;
s.bitk = k;
z.avail_in = n;
z.total_in += p - z.next_in_index;
z.next_in_index = p;
s.write = q;
return s.inflate_flush(z, r);
case BADCODE: // x: got error
r = Z_DATA_ERROR;
s.bitb = b;
s.bitk = k;
z.avail_in = n;
z.total_in += p - z.next_in_index;
z.next_in_index = p;
s.write = q;
return s.inflate_flush(z, r);
default:
r = Z_STREAM_ERROR;
s.bitb = b;
s.bitk = k;
z.avail_in = n;
z.total_in += p - z.next_in_index;
z.next_in_index = p;
s.write = q;
return s.inflate_flush(z, r);
}
}
};
that.free = function() {
// ZFREE(z, c);
};
}
// InfBlocks
// Table for deflate from PKZIP's appnote.txt.
var border = [ // Order of the bit length code lengths
16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15 ];
var TYPE = 0; // get type bits (3, including end bit)
var LENS = 1; // get lengths for stored
var STORED = 2;// processing stored block
var TABLE = 3; // get table lengths
var BTREE = 4; // get bit lengths tree for a dynamic
// block
var DTREE = 5; // get length, distance trees for a
// dynamic block
var CODES = 6; // processing fixed or dynamic block
var DRY = 7; // output remaining window bytes
var DONELOCKS = 8; // finished last block, done
var BADBLOCKS = 9; // ot a data error--stuck here
function InfBlocks(z, w) {
var that = this;
var mode = TYPE; // current inflate_block mode
var left = 0; // if STORED, bytes left to copy
var table = 0; // table lengths (14 bits)
var index = 0; // index into blens (or border)
var blens; // bit lengths of codes
var bb = [ 0 ]; // bit length tree depth
var tb = [ 0 ]; // bit length decoding tree
var codes = new InfCodes(); // if CODES, current state
var last = 0; // true if this block is the last block
var hufts = new Int32Array(MANY * 3); // single malloc for tree space
var check = 0; // check on output
var inftree = new InfTree();
that.bitk = 0; // bits in bit buffer
that.bitb = 0; // bit buffer
that.window = new Uint8Array(w); // sliding window
that.end = w; // one byte after sliding window
that.read = 0; // window read pointer
that.write = 0; // window write pointer
that.reset = function(z, c) {
if (c)
c[0] = check;
// if (mode == BTREE || mode == DTREE) {
// }
if (mode == CODES) {
codes.free(z);
}
mode = TYPE;
that.bitk = 0;
that.bitb = 0;
that.read = that.write = 0;
};
that.reset(z, null);
// copy as much as possible from the sliding window to the output area
that.inflate_flush = function(z, r) {
var n;
var p;
var q;
// local copies of source and destination pointers
p = z.next_out_index;
q = that.read;
// compute number of bytes to copy as far as end of window
n = /* (int) */((q <= that.write ? that.write : that.end) - q);
if (n > z.avail_out)
n = z.avail_out;
if (n !== 0 && r == Z_BUF_ERROR)
r = Z_OK;
// update counters
z.avail_out -= n;
z.total_out += n;
// copy as far as end of window
z.next_out.set(that.window.subarray(q, q + n), p);
p += n;
q += n;
// see if more to copy at beginning of window
if (q == that.end) {
// wrap pointers
q = 0;
if (that.write == that.end)
that.write = 0;
// compute bytes to copy
n = that.write - q;
if (n > z.avail_out)
n = z.avail_out;
if (n !== 0 && r == Z_BUF_ERROR)
r = Z_OK;
// update counters
z.avail_out -= n;
z.total_out += n;
// copy
z.next_out.set(that.window.subarray(q, q + n), p);
p += n;
q += n;
}
// update pointers
z.next_out_index = p;
that.read = q;
// done
return r;
};
that.proc = function(z, r) {
var t; // temporary storage
var b; // bit buffer
var k; // bits in bit buffer
var p; // input data pointer
var n; // bytes available there
var q; // output window write pointer
var m; // bytes to end of window or read pointer
var i;
// copy input/output information to locals (UPDATE macro restores)
// {
p = z.next_in_index;
n = z.avail_in;
b = that.bitb;
k = that.bitk;
// }
// {
q = that.write;
m = /* (int) */(q < that.read ? that.read - q - 1 : that.end - q);
// }
// process input based on current state
// DEBUG dtree
while (true) {
switch (mode) {
case TYPE:
while (k < (3)) {
if (n !== 0) {
r = Z_OK;
} else {
that.bitb = b;
that.bitk = k;
z.avail_in = n;
z.total_in += p - z.next_in_index;
z.next_in_index = p;
that.write = q;
return that.inflate_flush(z, r);
}
n--;
b |= (z.read_byte(p++) & 0xff) << k;
k += 8;
}
t = /* (int) */(b & 7);
last = t & 1;
switch (t >>> 1) {
case 0: // stored
// {
b >>>= (3);
k -= (3);
// }
t = k & 7; // go to byte boundary
// {
b >>>= (t);
k -= (t);
// }
mode = LENS; // get length of stored block
break;
case 1: // fixed
// {
var bl = []; // new Array(1);
var bd = []; // new Array(1);
var tl = [ [] ]; // new Array(1);
var td = [ [] ]; // new Array(1);
InfTree.inflate_trees_fixed(bl, bd, tl, td);
codes.init(bl[0], bd[0], tl[0], 0, td[0], 0);
// }
// {
b >>>= (3);
k -= (3);
// }
mode = CODES;
break;
case 2: // dynamic
// {
b >>>= (3);
k -= (3);
// }
mode = TABLE;
break;
case 3: // illegal
// {
b >>>= (3);
k -= (3);
// }
mode = BADBLOCKS;
z.msg = "invalid block type";
r = Z_DATA_ERROR;
that.bitb = b;
that.bitk = k;
z.avail_in = n;
z.total_in += p - z.next_in_index;
z.next_in_index = p;
that.write = q;
return that.inflate_flush(z, r);
}
break;
case LENS:
while (k < (32)) {
if (n !== 0) {
r = Z_OK;
} else {
that.bitb = b;
that.bitk = k;
z.avail_in = n;
z.total_in += p - z.next_in_index;
z.next_in_index = p;
that.write = q;
return that.inflate_flush(z, r);
}
n--;
b |= (z.read_byte(p++) & 0xff) << k;
k += 8;
}
if ((((~b) >>> 16) & 0xffff) != (b & 0xffff)) {
mode = BADBLOCKS;
z.msg = "invalid stored block lengths";
r = Z_DATA_ERROR;
that.bitb = b;
that.bitk = k;
z.avail_in = n;
z.total_in += p - z.next_in_index;
z.next_in_index = p;
that.write = q;
return that.inflate_flush(z, r);
}
left = (b & 0xffff);
b = k = 0; // dump bits
mode = left !== 0 ? STORED : (last !== 0 ? DRY : TYPE);
break;
case STORED:
if (n === 0) {
that.bitb = b;
that.bitk = k;
z.avail_in = n;
z.total_in += p - z.next_in_index;
z.next_in_index = p;
that.write = q;
return that.inflate_flush(z, r);
}
if (m === 0) {
if (q == that.end && that.read !== 0) {
q = 0;
m = /* (int) */(q < that.read ? that.read - q - 1 : that.end - q);
}
if (m === 0) {
that.write = q;
r = that.inflate_flush(z, r);
q = that.write;
m = /* (int) */(q < that.read ? that.read - q - 1 : that.end - q);
if (q == that.end && that.read !== 0) {
q = 0;
m = /* (int) */(q < that.read ? that.read - q - 1 : that.end - q);
}
if (m === 0) {
that.bitb = b;
that.bitk = k;
z.avail_in = n;
z.total_in += p - z.next_in_index;
z.next_in_index = p;
that.write = q;
return that.inflate_flush(z, r);
}
}
}
r = Z_OK;
t = left;
if (t > n)
t = n;
if (t > m)
t = m;
that.window.set(z.read_buf(p, t), q);
p += t;
n -= t;
q += t;
m -= t;
if ((left -= t) !== 0)
break;
mode = last !== 0 ? DRY : TYPE;
break;
case TABLE:
while (k < (14)) {
if (n !== 0) {
r = Z_OK;
} else {
that.bitb = b;
that.bitk = k;
z.avail_in = n;
z.total_in += p - z.next_in_index;
z.next_in_index = p;
that.write = q;
return that.inflate_flush(z, r);
}
n--;
b |= (z.read_byte(p++) & 0xff) << k;
k += 8;
}
table = t = (b & 0x3fff);
if ((t & 0x1f) > 29 || ((t >> 5) & 0x1f) > 29) {
mode = BADBLOCKS;
z.msg = "too many length or distance symbols";
r = Z_DATA_ERROR;
that.bitb = b;
that.bitk = k;
z.avail_in = n;
z.total_in += p - z.next_in_index;
z.next_in_index = p;
that.write = q;
return that.inflate_flush(z, r);
}
t = 258 + (t & 0x1f) + ((t >> 5) & 0x1f);
if (!blens || blens.length < t) {
blens = []; // new Array(t);
} else {
for (i = 0; i < t; i++) {
blens[i] = 0;
}
}
// {
b >>>= (14);
k -= (14);
// }
index = 0;
mode = BTREE;
case BTREE:
while (index < 4 + (table >>> 10)) {
while (k < (3)) {
if (n !== 0) {
r = Z_OK;
} else {
that.bitb = b;
that.bitk = k;
z.avail_in = n;
z.total_in += p - z.next_in_index;
z.next_in_index = p;
that.write = q;
return that.inflate_flush(z, r);
}
n--;
b |= (z.read_byte(p++) & 0xff) << k;
k += 8;
}
blens[border[index++]] = b & 7;
// {
b >>>= (3);
k -= (3);
// }
}
while (index < 19) {
blens[border[index++]] = 0;
}
bb[0] = 7;
t = inftree.inflate_trees_bits(blens, bb, tb, hufts, z);
if (t != Z_OK) {
r = t;
if (r == Z_DATA_ERROR) {
blens = null;
mode = BADBLOCKS;
}
that.bitb = b;
that.bitk = k;
z.avail_in = n;
z.total_in += p - z.next_in_index;
z.next_in_index = p;
that.write = q;
return that.inflate_flush(z, r);
}
index = 0;
mode = DTREE;
case DTREE:
while (true) {
t = table;
if (!(index < 258 + (t & 0x1f) + ((t >> 5) & 0x1f))) {
break;
}
var j, c;
t = bb[0];
while (k < (t)) {
if (n !== 0) {
r = Z_OK;
} else {
that.bitb = b;
that.bitk = k;
z.avail_in = n;
z.total_in += p - z.next_in_index;
z.next_in_index = p;
that.write = q;
return that.inflate_flush(z, r);
}
n--;
b |= (z.read_byte(p++) & 0xff) << k;
k += 8;
}
// if (tb[0] == -1) {
// System.err.println("null...");
// }
t = hufts[(tb[0] + (b & inflate_mask[t])) * 3 + 1];
c = hufts[(tb[0] + (b & inflate_mask[t])) * 3 + 2];
if (c < 16) {
b >>>= (t);
k -= (t);
blens[index++] = c;
} else { // c == 16..18
i = c == 18 ? 7 : c - 14;
j = c == 18 ? 11 : 3;
while (k < (t + i)) {
if (n !== 0) {
r = Z_OK;
} else {
that.bitb = b;
that.bitk = k;
z.avail_in = n;
z.total_in += p - z.next_in_index;
z.next_in_index = p;
that.write = q;
return that.inflate_flush(z, r);
}
n--;
b |= (z.read_byte(p++) & 0xff) << k;
k += 8;
}
b >>>= (t);
k -= (t);
j += (b & inflate_mask[i]);
b >>>= (i);
k -= (i);
i = index;
t = table;
if (i + j > 258 + (t & 0x1f) + ((t >> 5) & 0x1f) || (c == 16 && i < 1)) {
blens = null;
mode = BADBLOCKS;
z.msg = "invalid bit length repeat";
r = Z_DATA_ERROR;
that.bitb = b;
that.bitk = k;
z.avail_in = n;
z.total_in += p - z.next_in_index;
z.next_in_index = p;
that.write = q;
return that.inflate_flush(z, r);
}
c = c == 16 ? blens[i - 1] : 0;
do {
blens[i++] = c;
} while (--j !== 0);
index = i;
}
}
tb[0] = -1;
// {
var bl_ = []; // new Array(1);
var bd_ = []; // new Array(1);
var tl_ = []; // new Array(1);
var td_ = []; // new Array(1);
bl_[0] = 9; // must be <= 9 for lookahead assumptions
bd_[0] = 6; // must be <= 9 for lookahead assumptions
t = table;
t = inftree.inflate_trees_dynamic(257 + (t & 0x1f), 1 + ((t >> 5) & 0x1f), blens, bl_, bd_, tl_, td_, hufts, z);
if (t != Z_OK) {
if (t == Z_DATA_ERROR) {
blens = null;
mode = BADBLOCKS;
}
r = t;
that.bitb = b;
that.bitk = k;
z.avail_in = n;
z.total_in += p - z.next_in_index;
z.next_in_index = p;
that.write = q;
return that.inflate_flush(z, r);
}
codes.init(bl_[0], bd_[0], hufts, tl_[0], hufts, td_[0]);
// }
mode = CODES;
case CODES:
that.bitb = b;
that.bitk = k;
z.avail_in = n;
z.total_in += p - z.next_in_index;
z.next_in_index = p;
that.write = q;
if ((r = codes.proc(that, z, r)) != Z_STREAM_END) {
return that.inflate_flush(z, r);
}
r = Z_OK;
codes.free(z);
p = z.next_in_index;
n = z.avail_in;
b = that.bitb;
k = that.bitk;
q = that.write;
m = /* (int) */(q < that.read ? that.read - q - 1 : that.end - q);
if (last === 0) {
mode = TYPE;
break;
}
mode = DRY;
case DRY:
that.write = q;
r = that.inflate_flush(z, r);
q = that.write;
m = /* (int) */(q < that.read ? that.read - q - 1 : that.end - q);
if (that.read != that.write) {
that.bitb = b;
that.bitk = k;
z.avail_in = n;
z.total_in += p - z.next_in_index;
z.next_in_index = p;
that.write = q;
return that.inflate_flush(z, r);
}
mode = DONELOCKS;
case DONELOCKS:
r = Z_STREAM_END;
that.bitb = b;
that.bitk = k;
z.avail_in = n;
z.total_in += p - z.next_in_index;
z.next_in_index = p;
that.write = q;
return that.inflate_flush(z, r);
case BADBLOCKS:
r = Z_DATA_ERROR;
that.bitb = b;
that.bitk = k;
z.avail_in = n;
z.total_in += p - z.next_in_index;
z.next_in_index = p;
that.write = q;
return that.inflate_flush(z, r);
default:
r = Z_STREAM_ERROR;
that.bitb = b;
that.bitk = k;
z.avail_in = n;
z.total_in += p - z.next_in_index;
z.next_in_index = p;
that.write = q;
return that.inflate_flush(z, r);
}
}
};
that.free = function(z) {
that.reset(z, null);
that.window = null;
hufts = null;
// ZFREE(z, s);
};
that.set_dictionary = function(d, start, n) {
that.window.set(d.subarray(start, start + n), 0);
that.read = that.write = n;
};
// Returns true if inflate is currently at the end of a block generated
// by Z_SYNC_FLUSH or Z_FULL_FLUSH.
that.sync_point = function() {
return mode == LENS ? 1 : 0;
};
}
// Inflate
// preset dictionary flag in zlib header
var PRESET_DICT = 0x20;
var Z_DEFLATED = 8;
var METHOD = 0; // waiting for method byte
var FLAG = 1; // waiting for flag byte
var DICT4 = 2; // four dictionary check bytes to go
var DICT3 = 3; // three dictionary check bytes to go
var DICT2 = 4; // two dictionary check bytes to go
var DICT1 = 5; // one dictionary check byte to go
var DICT0 = 6; // waiting for inflateSetDictionary
var BLOCKS = 7; // decompressing blocks
var DONE = 12; // finished check, done
var BAD = 13; // got an error--stay here
var mark = [ 0, 0, 0xff, 0xff ];
function Inflate() {
var that = this;
that.mode = 0; // current inflate mode
// mode dependent information
that.method = 0; // if FLAGS, method byte
// if CHECK, check values to compare
that.was = [ 0 ]; // new Array(1); // computed check value
that.need = 0; // stream check value
// if BAD, inflateSync's marker bytes count
that.marker = 0;
// mode independent information
that.wbits = 0; // log2(window size) (8..15, defaults to 15)
// this.blocks; // current inflate_blocks state
function inflateReset(z) {
if (!z || !z.istate)
return Z_STREAM_ERROR;
z.total_in = z.total_out = 0;
z.msg = null;
z.istate.mode = BLOCKS;
z.istate.blocks.reset(z, null);
return Z_OK;
}
that.inflateEnd = function(z) {
if (that.blocks)
that.blocks.free(z);
that.blocks = null;
// ZFREE(z, z->state);
return Z_OK;
};
that.inflateInit = function(z, w) {
z.msg = null;
that.blocks = null;
// set window size
if (w < 8 || w > 15) {
that.inflateEnd(z);
return Z_STREAM_ERROR;
}
that.wbits = w;
z.istate.blocks = new InfBlocks(z, 1 << w);
// reset state
inflateReset(z);
return Z_OK;
};
that.inflate = function(z, f) {
var r;
var b;
if (!z || !z.istate || !z.next_in)
return Z_STREAM_ERROR;
f = f == Z_FINISH ? Z_BUF_ERROR : Z_OK;
r = Z_BUF_ERROR;
while (true) {
// System.out.println("mode: "+z.istate.mode);
switch (z.istate.mode) {
case METHOD:
if (z.avail_in === 0)
return r;
r = f;
z.avail_in--;
z.total_in++;
if (((z.istate.method = z.read_byte(z.next_in_index++)) & 0xf) != Z_DEFLATED) {
z.istate.mode = BAD;
z.msg = "unknown compression method";
z.istate.marker = 5; // can't try inflateSync
break;
}
if ((z.istate.method >> 4) + 8 > z.istate.wbits) {
z.istate.mode = BAD;
z.msg = "invalid window size";
z.istate.marker = 5; // can't try inflateSync
break;
}
z.istate.mode = FLAG;
case FLAG:
if (z.avail_in === 0)
return r;
r = f;
z.avail_in--;
z.total_in++;
b = (z.read_byte(z.next_in_index++)) & 0xff;
if ((((z.istate.method << 8) + b) % 31) !== 0) {
z.istate.mode = BAD;
z.msg = "incorrect header check";
z.istate.marker = 5; // can't try inflateSync
break;
}
if ((b & PRESET_DICT) === 0) {
z.istate.mode = BLOCKS;
break;
}
z.istate.mode = DICT4;
case DICT4:
if (z.avail_in === 0)
return r;
r = f;
z.avail_in--;
z.total_in++;
z.istate.need = ((z.read_byte(z.next_in_index++) & 0xff) << 24) & 0xff000000;
z.istate.mode = DICT3;
case DICT3:
if (z.avail_in === 0)
return r;
r = f;
z.avail_in--;
z.total_in++;
z.istate.need += ((z.read_byte(z.next_in_index++) & 0xff) << 16) & 0xff0000;
z.istate.mode = DICT2;
case DICT2:
if (z.avail_in === 0)
return r;
r = f;
z.avail_in--;
z.total_in++;
z.istate.need += ((z.read_byte(z.next_in_index++) & 0xff) << 8) & 0xff00;
z.istate.mode = DICT1;
case DICT1:
if (z.avail_in === 0)
return r;
r = f;
z.avail_in--;
z.total_in++;
z.istate.need += (z.read_byte(z.next_in_index++) & 0xff);
z.istate.mode = DICT0;
return Z_NEED_DICT;
case DICT0:
z.istate.mode = BAD;
z.msg = "need dictionary";
z.istate.marker = 0; // can try inflateSync
return Z_STREAM_ERROR;
case BLOCKS:
r = z.istate.blocks.proc(z, r);
if (r == Z_DATA_ERROR) {
z.istate.mode = BAD;
z.istate.marker = 0; // can try inflateSync
break;
}
if (r == Z_OK) {
r = f;
}
if (r != Z_STREAM_END) {
return r;
}
r = f;
z.istate.blocks.reset(z, z.istate.was);
z.istate.mode = DONE;
case DONE:
return Z_STREAM_END;
case BAD:
return Z_DATA_ERROR;
default:
return Z_STREAM_ERROR;
}
}
};
that.inflateSetDictionary = function(z, dictionary, dictLength) {
var index = 0;
var length = dictLength;
if (!z || !z.istate || z.istate.mode != DICT0)
return Z_STREAM_ERROR;
if (length >= (1 << z.istate.wbits)) {
length = (1 << z.istate.wbits) - 1;
index = dictLength - length;
}
z.istate.blocks.set_dictionary(dictionary, index, length);
z.istate.mode = BLOCKS;
return Z_OK;
};
that.inflateSync = function(z) {
var n; // number of bytes to look at
var p; // pointer to bytes
var m; // number of marker bytes found in a row
var r, w; // temporaries to save total_in and total_out
// set up
if (!z || !z.istate)
return Z_STREAM_ERROR;
if (z.istate.mode != BAD) {
z.istate.mode = BAD;
z.istate.marker = 0;
}
if ((n = z.avail_in) === 0)
return Z_BUF_ERROR;
p = z.next_in_index;
m = z.istate.marker;
// search
while (n !== 0 && m < 4) {
if (z.read_byte(p) == mark[m]) {
m++;
} else if (z.read_byte(p) !== 0) {
m = 0;
} else {
m = 4 - m;
}
p++;
n--;
}
// restore
z.total_in += p - z.next_in_index;
z.next_in_index = p;
z.avail_in = n;
z.istate.marker = m;
// return no joy or set up to restart on a new block
if (m != 4) {
return Z_DATA_ERROR;
}
r = z.total_in;
w = z.total_out;
inflateReset(z);
z.total_in = r;
z.total_out = w;
z.istate.mode = BLOCKS;
return Z_OK;
};
// Returns true if inflate is currently at the end of a block generated
// by Z_SYNC_FLUSH or Z_FULL_FLUSH. This function is used by one PPP
// implementation to provide an additional safety check. PPP uses
// Z_SYNC_FLUSH
// but removes the length bytes of the resulting empty stored block. When
// decompressing, PPP checks that at the end of input packet, inflate is
// waiting for these length bytes.
that.inflateSyncPoint = function(z) {
if (!z || !z.istate || !z.istate.blocks)
return Z_STREAM_ERROR;
return z.istate.blocks.sync_point();
};
}
// ZStream
function ZStream() {
}
ZStream.prototype = {
inflateInit : function(bits) {
var that = this;
that.istate = new Inflate();
if (!bits)
bits = MAX_BITS;
return that.istate.inflateInit(that, bits);
},
inflate : function(f) {
var that = this;
if (!that.istate)
return Z_STREAM_ERROR;
return that.istate.inflate(that, f);
},
inflateEnd : function() {
var that = this;
if (!that.istate)
return Z_STREAM_ERROR;
var ret = that.istate.inflateEnd(that);
that.istate = null;
return ret;
},
inflateSync : function() {
var that = this;
if (!that.istate)
return Z_STREAM_ERROR;
return that.istate.inflateSync(that);
},
inflateSetDictionary : function(dictionary, dictLength) {
var that = this;
if (!that.istate)
return Z_STREAM_ERROR;
return that.istate.inflateSetDictionary(that, dictionary, dictLength);
},
read_byte : function(start) {
var that = this;
return that.next_in.subarray(start, start + 1)[0];
},
read_buf : function(start, size) {
var that = this;
return that.next_in.subarray(start, start + size);
}
};
// Inflater
function Inflater() {
var that = this;
var z = new ZStream();
var bufsize = 512;
var flush = Z_NO_FLUSH;
var buf = new Uint8Array(bufsize);
var nomoreinput = false;
z.inflateInit();
z.next_out = buf;
that.append = function(data, onprogress) {
var err, buffers = [], lastIndex = 0, bufferIndex = 0, bufferSize = 0, array;
if (data.length === 0)
return;
z.next_in_index = 0;
z.next_in = data;
z.avail_in = data.length;
do {
z.next_out_index = 0;
z.avail_out = bufsize;
if ((z.avail_in === 0) && (!nomoreinput)) { // if buffer is empty and more input is available, refill it
z.next_in_index = 0;
nomoreinput = true;
}
err = z.inflate(flush);
if (nomoreinput && (err == Z_BUF_ERROR))
return -1;
if (err != Z_OK && err != Z_STREAM_END)
throw "inflating: " + z.msg;
if ((nomoreinput || err == Z_STREAM_END) && (z.avail_in == data.length))
return -1;
if (z.next_out_index)
if (z.next_out_index == bufsize)
buffers.push(new Uint8Array(buf));
else
buffers.push(new Uint8Array(buf.subarray(0, z.next_out_index)));
bufferSize += z.next_out_index;
if (onprogress && z.next_in_index > 0 && z.next_in_index != lastIndex) {
onprogress(z.next_in_index);
lastIndex = z.next_in_index;
}
} while (z.avail_in > 0 || z.avail_out === 0);
array = new Uint8Array(bufferSize);
buffers.forEach(function(chunk) {
array.set(chunk, bufferIndex);
bufferIndex += chunk.length;
});
return array;
};
that.flush = function() {
z.inflateEnd();
};
}
return Inflater;
});