lzma
Version:
A JavaScript implementation of the Lempel-Ziv-Markov (LZMA) chain compression algorithm
879 lines (768 loc) • 31.8 kB
JavaScript
///NOTE: This file was generated by minify.js from lzma_worker.js. Do not modify.
/// © 2015 Nathan Rugg <nmrugg@gmail.com> | MIT
/// See LICENSE for more details.
/* jshint noarg:true, boss:true, unused:strict, strict:true, undef:true, noarg: true, forin:true, evil:true, newcap:false, -W041, -W021, worker:true, browser:true, node:true */
/* global setImmediate, setTimeout, window, onmessage */
var LZMA = (function () {
"use strict";
var
/** ds */
action_decompress = 2,
/** de */
action_progress = 3,
wait = typeof setImmediate == "function" ? setImmediate : setTimeout,
__4294967296 = 4294967296,
N1_longLit = [4294967295, -__4294967296],
P0_longLit = [0, 0],
P1_longLit = [1, 0];
function update_progress(percent, cbn) {
postMessage({
action: action_progress,
cbn: cbn,
result: percent
});
}
function initDim(len) {
///NOTE: This is MUCH faster than "new Array(len)" in newer versions of v8 (starting with Node.js 0.11.15, which uses v8 3.28.73).
var a = [];
a[len - 1] = undefined;
return a;
}
function add(a, b) {
return create(a[0] + b[0], a[1] + b[1]);
}
function compare(a, b) {
var nega, negb;
if (a[0] == b[0] && a[1] == b[1]) {
return 0;
}
nega = a[1] < 0;
negb = b[1] < 0;
if (nega && !negb) {
return -1;
}
if (!nega && negb) {
return 1;
}
if (sub(a, b)[1] < 0) {
return -1;
}
return 1;
}
function create(valueLow, valueHigh) {
var diffHigh, diffLow;
valueHigh %= 1.8446744073709552E19;
valueLow %= 1.8446744073709552E19;
diffHigh = valueHigh % __4294967296;
diffLow = Math.floor(valueLow / __4294967296) * __4294967296;
valueHigh = valueHigh - diffHigh + diffLow;
valueLow = valueLow - diffLow + diffHigh;
while (valueLow < 0) {
valueLow += __4294967296;
valueHigh -= __4294967296;
}
while (valueLow > 4294967295) {
valueLow -= __4294967296;
valueHigh += __4294967296;
}
valueHigh = valueHigh % 1.8446744073709552E19;
while (valueHigh > 9223372032559808512) {
valueHigh -= 1.8446744073709552E19;
}
while (valueHigh < -9223372036854775808) {
valueHigh += 1.8446744073709552E19;
}
return [valueLow, valueHigh];
}
function fromInt(value) {
if (value >= 0) {
return [value, 0];
} else {
return [value + __4294967296, -__4294967296];
}
}
function lowBits_0(a) {
if (a[0] >= 2147483648) {
return ~~Math.max(Math.min(a[0] - __4294967296, 2147483647), -2147483648);
} else {
return ~~Math.max(Math.min(a[0], 2147483647), -2147483648);
}
}
function sub(a, b) {
return create(a[0] - b[0], a[1] - b[1]);
}
function $ByteArrayInputStream(this$static, buf) {
this$static.buf = buf;
this$static.pos = 0;
this$static.count = buf.length;
return this$static;
}
/** ds */
function $read(this$static) {
if (this$static.pos >= this$static.count)
return -1;
return this$static.buf[this$static.pos++] & 255;
}
/** de */
function $ByteArrayOutputStream(this$static) {
this$static.buf = initDim(32);
this$static.count = 0;
return this$static;
}
function $toByteArray(this$static) {
var data = this$static.buf;
data.length = this$static.count;
return data;
}
function $write_0(this$static, buf, off, len) {
arraycopy(buf, off, this$static.buf, this$static.count, len);
this$static.count += len;
}
function arraycopy(src, srcOfs, dest, destOfs, len) {
for (var i = 0; i < len; ++i) {
dest[destOfs + i] = src[srcOfs + i];
}
}
/** ds */
function $init_0(this$static, input, output) {
var decoder,
hex_length = "",
i,
properties = [],
r,
tmp_length;
for (i = 0; i < 5; ++i) {
r = $read(input);
if (r == -1)
throw new Error("truncated input");
properties[i] = r << 24 >> 24;
}
decoder = $Decoder({});
if (!$SetDecoderProperties(decoder, properties)) {
throw new Error("corrupted input");
}
for (i = 0; i < 64; i += 8) {
r = $read(input);
if (r == -1)
throw new Error("truncated input");
r = r.toString(16);
if (r.length == 1) r = "0" + r;
hex_length = r + "" + hex_length;
}
/// Was the length set in the header (if it was compressed from a stream, the length is all f"s).
if (/^0+$|^f+$/i.test(hex_length)) {
/// The length is unknown, so set to -1.
this$static.length_0 = N1_longLit;
} else {
///NOTE: If there is a problem with the decoder because of the length, you can always set the length to -1 (N1_longLit) which means unknown.
tmp_length = parseInt(hex_length, 16);
/// If the length is too long to handle, just set it to unknown.
if (tmp_length > 4294967295) {
this$static.length_0 = N1_longLit;
} else {
this$static.length_0 = fromInt(tmp_length);
}
}
this$static.chunker = $CodeInChunks(decoder, input, output, this$static.length_0);
}
function $LZMAByteArrayDecompressor(this$static, data) {
this$static.output = $ByteArrayOutputStream({});
$init_0(this$static, $ByteArrayInputStream({}, data), this$static.output);
return this$static;
}
/** de */
/** ds */
function $CopyBlock(this$static, distance, len) {
var pos = this$static._pos - distance - 1;
if (pos < 0) {
pos += this$static._windowSize;
}
for (; len != 0; --len) {
if (pos >= this$static._windowSize) {
pos = 0;
}
this$static._buffer[this$static._pos++] = this$static._buffer[pos++];
if (this$static._pos >= this$static._windowSize) {
$Flush_0(this$static);
}
}
}
function $Create_5(this$static, windowSize) {
if (this$static._buffer == null || this$static._windowSize != windowSize) {
this$static._buffer = initDim(windowSize);
}
this$static._windowSize = windowSize;
this$static._pos = 0;
this$static._streamPos = 0;
}
function $Flush_0(this$static) {
var size = this$static._pos - this$static._streamPos;
if (!size) {
return;
}
$write_0(this$static._stream, this$static._buffer, this$static._streamPos, size);
if (this$static._pos >= this$static._windowSize) {
this$static._pos = 0;
}
this$static._streamPos = this$static._pos;
}
function $GetByte(this$static, distance) {
var pos = this$static._pos - distance - 1;
if (pos < 0) {
pos += this$static._windowSize;
}
return this$static._buffer[pos];
}
function $PutByte(this$static, b) {
this$static._buffer[this$static._pos++] = b;
if (this$static._pos >= this$static._windowSize) {
$Flush_0(this$static);
}
}
function $ReleaseStream(this$static) {
$Flush_0(this$static);
this$static._stream = null;
}
/** de */
function GetLenToPosState(len) {
len -= 2;
if (len < 4) {
return len;
}
return 3;
}
function StateUpdateChar(index) {
if (index < 4) {
return 0;
}
if (index < 10) {
return index - 3;
}
return index - 6;
}
/** ds */
function $Chunker(this$static, decoder) {
this$static.decoder = decoder;
this$static.encoder = null;
this$static.alive = 1;
return this$static;
}
/** de */
function $processChunk(this$static) {
if (!this$static.alive) {
throw new Error("bad state");
}
if (this$static.encoder) {
throw new Error("No encoding");
} else {
/// co:throw new Error("No decoding");
/** ds */
$processDecoderChunk(this$static);
/** de */
}
return this$static.alive;
}
/** ds */
function $processDecoderChunk(this$static) {
var result = $CodeOneChunk(this$static.decoder);
if (result == -1) {
throw new Error("corrupted input");
}
this$static.inBytesProcessed = N1_longLit;
this$static.outBytesProcessed = this$static.decoder.nowPos64;
if (result || compare(this$static.decoder.outSize, P0_longLit) >= 0 && compare(this$static.decoder.nowPos64, this$static.decoder.outSize) >= 0) {
$Flush_0(this$static.decoder.m_OutWindow);
$ReleaseStream(this$static.decoder.m_OutWindow);
this$static.decoder.m_RangeDecoder.Stream = null;
this$static.alive = 0;
}
}
/** de */
/** ds */
function $CodeInChunks(this$static, inStream, outStream, outSize) {
this$static.m_RangeDecoder.Stream = inStream;
$ReleaseStream(this$static.m_OutWindow);
this$static.m_OutWindow._stream = outStream;
$Init_1(this$static);
this$static.state = 0;
this$static.rep0 = 0;
this$static.rep1 = 0;
this$static.rep2 = 0;
this$static.rep3 = 0;
this$static.outSize = outSize;
this$static.nowPos64 = P0_longLit;
this$static.prevByte = 0;
return $Chunker({}, this$static);
}
function $CodeOneChunk(this$static) {
var decoder2, distance, len, numDirectBits, posSlot, posState;
posState = lowBits_0(this$static.nowPos64) & this$static.m_PosStateMask;
if (!$DecodeBit(this$static.m_RangeDecoder, this$static.m_IsMatchDecoders, (this$static.state << 4) + posState)) {
decoder2 = $GetDecoder(this$static.m_LiteralDecoder, lowBits_0(this$static.nowPos64), this$static.prevByte);
if (this$static.state < 7) {
this$static.prevByte = $DecodeNormal(decoder2, this$static.m_RangeDecoder);
} else {
this$static.prevByte = $DecodeWithMatchByte(decoder2, this$static.m_RangeDecoder, $GetByte(this$static.m_OutWindow, this$static.rep0));
}
$PutByte(this$static.m_OutWindow, this$static.prevByte);
this$static.state = StateUpdateChar(this$static.state);
this$static.nowPos64 = add(this$static.nowPos64, P1_longLit);
} else {
if ($DecodeBit(this$static.m_RangeDecoder, this$static.m_IsRepDecoders, this$static.state)) {
len = 0;
if (!$DecodeBit(this$static.m_RangeDecoder, this$static.m_IsRepG0Decoders, this$static.state)) {
if (!$DecodeBit(this$static.m_RangeDecoder, this$static.m_IsRep0LongDecoders, (this$static.state << 4) + posState)) {
this$static.state = this$static.state < 7?9:11;
len = 1;
}
} else {
if (!$DecodeBit(this$static.m_RangeDecoder, this$static.m_IsRepG1Decoders, this$static.state)) {
distance = this$static.rep1;
} else {
if (!$DecodeBit(this$static.m_RangeDecoder, this$static.m_IsRepG2Decoders, this$static.state)) {
distance = this$static.rep2;
} else {
distance = this$static.rep3;
this$static.rep3 = this$static.rep2;
}
this$static.rep2 = this$static.rep1;
}
this$static.rep1 = this$static.rep0;
this$static.rep0 = distance;
}
if (!len) {
len = $Decode(this$static.m_RepLenDecoder, this$static.m_RangeDecoder, posState) + 2;
this$static.state = this$static.state < 7?8:11;
}
} else {
this$static.rep3 = this$static.rep2;
this$static.rep2 = this$static.rep1;
this$static.rep1 = this$static.rep0;
len = 2 + $Decode(this$static.m_LenDecoder, this$static.m_RangeDecoder, posState);
this$static.state = this$static.state < 7?7:10;
posSlot = $Decode_0(this$static.m_PosSlotDecoder[GetLenToPosState(len)], this$static.m_RangeDecoder);
if (posSlot >= 4) {
numDirectBits = (posSlot >> 1) - 1;
this$static.rep0 = (2 | posSlot & 1) << numDirectBits;
if (posSlot < 14) {
this$static.rep0 += ReverseDecode(this$static.m_PosDecoders, this$static.rep0 - posSlot - 1, this$static.m_RangeDecoder, numDirectBits);
} else {
this$static.rep0 += $DecodeDirectBits(this$static.m_RangeDecoder, numDirectBits - 4) << 4;
this$static.rep0 += $ReverseDecode(this$static.m_PosAlignDecoder, this$static.m_RangeDecoder);
if (this$static.rep0 < 0) {
if (this$static.rep0 == -1) {
return 1;
}
return -1;
}
}
} else
this$static.rep0 = posSlot;
}
if (compare(fromInt(this$static.rep0), this$static.nowPos64) >= 0 || this$static.rep0 >= this$static.m_DictionarySizeCheck) {
return -1;
}
$CopyBlock(this$static.m_OutWindow, this$static.rep0, len);
this$static.nowPos64 = add(this$static.nowPos64, fromInt(len));
this$static.prevByte = $GetByte(this$static.m_OutWindow, 0);
}
return 0;
}
function $Decoder(this$static) {
this$static.m_OutWindow = {};
this$static.m_RangeDecoder = {};
this$static.m_IsMatchDecoders = initDim(192);
this$static.m_IsRepDecoders = initDim(12);
this$static.m_IsRepG0Decoders = initDim(12);
this$static.m_IsRepG1Decoders = initDim(12);
this$static.m_IsRepG2Decoders = initDim(12);
this$static.m_IsRep0LongDecoders = initDim(192);
this$static.m_PosSlotDecoder = initDim(4);
this$static.m_PosDecoders = initDim(114);
this$static.m_PosAlignDecoder = $BitTreeDecoder({}, 4);
this$static.m_LenDecoder = $Decoder$LenDecoder({});
this$static.m_RepLenDecoder = $Decoder$LenDecoder({});
this$static.m_LiteralDecoder = {};
for (var i = 0; i < 4; ++i) {
this$static.m_PosSlotDecoder[i] = $BitTreeDecoder({}, 6);
}
return this$static;
}
function $Init_1(this$static) {
this$static.m_OutWindow._streamPos = 0;
this$static.m_OutWindow._pos = 0;
InitBitModels(this$static.m_IsMatchDecoders);
InitBitModels(this$static.m_IsRep0LongDecoders);
InitBitModels(this$static.m_IsRepDecoders);
InitBitModels(this$static.m_IsRepG0Decoders);
InitBitModels(this$static.m_IsRepG1Decoders);
InitBitModels(this$static.m_IsRepG2Decoders);
InitBitModels(this$static.m_PosDecoders);
$Init_0(this$static.m_LiteralDecoder);
for (var i = 0; i < 4; ++i) {
InitBitModels(this$static.m_PosSlotDecoder[i].Models);
}
$Init(this$static.m_LenDecoder);
$Init(this$static.m_RepLenDecoder);
InitBitModels(this$static.m_PosAlignDecoder.Models);
$Init_8(this$static.m_RangeDecoder);
}
function $SetDecoderProperties(this$static, properties) {
var dictionarySize, i, lc, lp, pb, remainder, val;
if (properties.length < 5)
return 0;
val = properties[0] & 255;
lc = val % 9;
remainder = ~~(val / 9);
lp = remainder % 5;
pb = ~~(remainder / 5);
dictionarySize = 0;
for (i = 0; i < 4; ++i) {
dictionarySize += (properties[1 + i] & 255) << i * 8;
}
///NOTE: If the input is bad, it might call for an insanely large dictionary size, which would crash the script.
if (dictionarySize > 99999999 || !$SetLcLpPb(this$static, lc, lp, pb)) {
return 0;
}
return $SetDictionarySize(this$static, dictionarySize);
}
function $SetDictionarySize(this$static, dictionarySize) {
if (dictionarySize < 0) {
return 0;
}
if (this$static.m_DictionarySize != dictionarySize) {
this$static.m_DictionarySize = dictionarySize;
this$static.m_DictionarySizeCheck = Math.max(this$static.m_DictionarySize, 1);
$Create_5(this$static.m_OutWindow, Math.max(this$static.m_DictionarySizeCheck, 4096));
}
return 1;
}
function $SetLcLpPb(this$static, lc, lp, pb) {
if (lc > 8 || lp > 4 || pb > 4) {
return 0;
}
$Create_0(this$static.m_LiteralDecoder, lp, lc);
var numPosStates = 1 << pb;
$Create(this$static.m_LenDecoder, numPosStates);
$Create(this$static.m_RepLenDecoder, numPosStates);
this$static.m_PosStateMask = numPosStates - 1;
return 1;
}
function $Create(this$static, numPosStates) {
for (; this$static.m_NumPosStates < numPosStates; ++this$static.m_NumPosStates) {
this$static.m_LowCoder[this$static.m_NumPosStates] = $BitTreeDecoder({}, 3);
this$static.m_MidCoder[this$static.m_NumPosStates] = $BitTreeDecoder({}, 3);
}
}
function $Decode(this$static, rangeDecoder, posState) {
if (!$DecodeBit(rangeDecoder, this$static.m_Choice, 0)) {
return $Decode_0(this$static.m_LowCoder[posState], rangeDecoder);
}
var symbol = 8;
if (!$DecodeBit(rangeDecoder, this$static.m_Choice, 1)) {
symbol += $Decode_0(this$static.m_MidCoder[posState], rangeDecoder);
} else {
symbol += 8 + $Decode_0(this$static.m_HighCoder, rangeDecoder);
}
return symbol;
}
function $Decoder$LenDecoder(this$static) {
this$static.m_Choice = initDim(2);
this$static.m_LowCoder = initDim(16);
this$static.m_MidCoder = initDim(16);
this$static.m_HighCoder = $BitTreeDecoder({}, 8);
this$static.m_NumPosStates = 0;
return this$static;
}
function $Init(this$static) {
InitBitModels(this$static.m_Choice);
for (var posState = 0; posState < this$static.m_NumPosStates; ++posState) {
InitBitModels(this$static.m_LowCoder[posState].Models);
InitBitModels(this$static.m_MidCoder[posState].Models);
}
InitBitModels(this$static.m_HighCoder.Models);
}
function $Create_0(this$static, numPosBits, numPrevBits) {
var i, numStates;
if (this$static.m_Coders != null && this$static.m_NumPrevBits == numPrevBits && this$static.m_NumPosBits == numPosBits)
return;
this$static.m_NumPosBits = numPosBits;
this$static.m_PosMask = (1 << numPosBits) - 1;
this$static.m_NumPrevBits = numPrevBits;
numStates = 1 << this$static.m_NumPrevBits + this$static.m_NumPosBits;
this$static.m_Coders = initDim(numStates);
for (i = 0; i < numStates; ++i)
this$static.m_Coders[i] = $Decoder$LiteralDecoder$Decoder2({});
}
function $GetDecoder(this$static, pos, prevByte) {
return this$static.m_Coders[((pos & this$static.m_PosMask) << this$static.m_NumPrevBits) + ((prevByte & 255) >>> 8 - this$static.m_NumPrevBits)];
}
function $Init_0(this$static) {
var i, numStates;
numStates = 1 << this$static.m_NumPrevBits + this$static.m_NumPosBits;
for (i = 0; i < numStates; ++i) {
InitBitModels(this$static.m_Coders[i].m_Decoders);
}
}
function $DecodeNormal(this$static, rangeDecoder) {
var symbol = 1;
do {
symbol = symbol << 1 | $DecodeBit(rangeDecoder, this$static.m_Decoders, symbol);
} while (symbol < 256);
return symbol << 24 >> 24;
}
function $DecodeWithMatchByte(this$static, rangeDecoder, matchByte) {
var bit, matchBit, symbol = 1;
do {
matchBit = matchByte >> 7 & 1;
matchByte <<= 1;
bit = $DecodeBit(rangeDecoder, this$static.m_Decoders, (1 + matchBit << 8) + symbol);
symbol = symbol << 1 | bit;
if (matchBit != bit) {
while (symbol < 256) {
symbol = symbol << 1 | $DecodeBit(rangeDecoder, this$static.m_Decoders, symbol);
}
break;
}
} while (symbol < 256);
return symbol << 24 >> 24;
}
function $Decoder$LiteralDecoder$Decoder2(this$static) {
this$static.m_Decoders = initDim(768);
return this$static;
}
/** de */
/** ds */
function $BitTreeDecoder(this$static, numBitLevels) {
this$static.NumBitLevels = numBitLevels;
this$static.Models = initDim(1 << numBitLevels);
return this$static;
}
function $Decode_0(this$static, rangeDecoder) {
var bitIndex, m = 1;
for (bitIndex = this$static.NumBitLevels; bitIndex != 0; --bitIndex) {
m = (m << 1) + $DecodeBit(rangeDecoder, this$static.Models, m);
}
return m - (1 << this$static.NumBitLevels);
}
function $ReverseDecode(this$static, rangeDecoder) {
var bit, bitIndex, m = 1, symbol = 0;
for (bitIndex = 0; bitIndex < this$static.NumBitLevels; ++bitIndex) {
bit = $DecodeBit(rangeDecoder, this$static.Models, m);
m <<= 1;
m += bit;
symbol |= bit << bitIndex;
}
return symbol;
}
function ReverseDecode(Models, startIndex, rangeDecoder, NumBitLevels) {
var bit, bitIndex, m = 1, symbol = 0;
for (bitIndex = 0; bitIndex < NumBitLevels; ++bitIndex) {
bit = $DecodeBit(rangeDecoder, Models, startIndex + m);
m <<= 1;
m += bit;
symbol |= bit << bitIndex;
}
return symbol;
}
/** de */
/** ds */
function $DecodeBit(this$static, probs, index) {
var newBound, prob = probs[index];
newBound = (this$static.Range >>> 11) * prob;
if ((this$static.Code ^ -2147483648) < (newBound ^ -2147483648)) {
this$static.Range = newBound;
probs[index] = prob + (2048 - prob >>> 5) << 16 >> 16;
if (!(this$static.Range & -16777216)) {
this$static.Code = this$static.Code << 8 | $read(this$static.Stream);
this$static.Range <<= 8;
}
return 0;
} else {
this$static.Range -= newBound;
this$static.Code -= newBound;
probs[index] = prob - (prob >>> 5) << 16 >> 16;
if (!(this$static.Range & -16777216)) {
this$static.Code = this$static.Code << 8 | $read(this$static.Stream);
this$static.Range <<= 8;
}
return 1;
}
}
function $DecodeDirectBits(this$static, numTotalBits) {
var i, t, result = 0;
for (i = numTotalBits; i != 0; --i) {
this$static.Range >>>= 1;
t = this$static.Code - this$static.Range >>> 31;
this$static.Code -= this$static.Range & t - 1;
result = result << 1 | 1 - t;
if (!(this$static.Range & -16777216)) {
this$static.Code = this$static.Code << 8 | $read(this$static.Stream);
this$static.Range <<= 8;
}
}
return result;
}
function $Init_8(this$static) {
this$static.Code = 0;
this$static.Range = -1;
for (var i = 0; i < 5; ++i) {
this$static.Code = this$static.Code << 8 | $read(this$static.Stream);
}
}
/** de */
function InitBitModels(probs) {
for (var i = probs.length - 1; i >= 0; --i) {
probs[i] = 1024;
}
}
/** ds */
function decode(utf) {
var i = 0, j = 0, x, y, z, l = utf.length, buf = [], charCodes = [];
for (; i < l; ++i, ++j) {
x = utf[i] & 255;
if (!(x & 128)) {
if (!x) {
/// It appears that this is binary data, so it cannot be converted to a string, so just send it back.
return utf;
}
charCodes[j] = x;
} else if ((x & 224) == 192) {
if (i + 1 >= l) {
/// It appears that this is binary data, so it cannot be converted to a string, so just send it back.
return utf;
}
y = utf[++i] & 255;
if ((y & 192) != 128) {
/// It appears that this is binary data, so it cannot be converted to a string, so just send it back.
return utf;
}
charCodes[j] = ((x & 31) << 6) | (y & 63);
} else if ((x & 240) == 224) {
if (i + 2 >= l) {
/// It appears that this is binary data, so it cannot be converted to a string, so just send it back.
return utf;
}
y = utf[++i] & 255;
if ((y & 192) != 128) {
/// It appears that this is binary data, so it cannot be converted to a string, so just send it back.
return utf;
}
z = utf[++i] & 255;
if ((z & 192) != 128) {
/// It appears that this is binary data, so it cannot be converted to a string, so just send it back.
return utf;
}
charCodes[j] = ((x & 15) << 12) | ((y & 63) << 6) | (z & 63);
} else {
/// It appears that this is binary data, so it cannot be converted to a string, so just send it back.
return utf;
}
if (j == 16383) {
buf.push(String.fromCharCode.apply(String, charCodes));
j = -1;
}
}
if (j > 0) {
charCodes.length = j;
buf.push(String.fromCharCode.apply(String, charCodes));
}
return buf.join("");
}
/** de */
function toDouble(a) {
return a[1] + a[0];
}
/** ds */
function decompress(byte_arr, on_finish, on_progress) {
var this$static = {},
percent,
cbn, /// A callback number should be supplied instead of on_finish() if we are using Web Workers.
has_progress,
len,
sync = typeof on_finish == "undefined" && typeof on_progress == "undefined";
if (typeof on_finish != "function") {
cbn = on_finish;
on_finish = on_progress = 0;
}
on_progress = on_progress || function(percent) {
if (typeof cbn == "undefined")
return;
return update_progress(has_progress ? percent : -1, cbn);
};
on_finish = on_finish || function(res, err) {
if (typeof cbn == "undefined")
return;
return postMessage({
action: action_decompress,
cbn: cbn,
result: res,
error: err
});
};
if (sync) {
this$static.d = $LZMAByteArrayDecompressor({}, byte_arr);
while ($processChunk(this$static.d.chunker));
return decode($toByteArray(this$static.d.output));
}
try {
this$static.d = $LZMAByteArrayDecompressor({}, byte_arr);
len = toDouble(this$static.d.length_0);
///NOTE: If the data was created via a stream, it will not have a length value, and therefore we can't calculate the progress.
has_progress = len > -1;
on_progress(0);
} catch (err) {
return on_finish(null, err);
}
function do_action() {
try {
var res, i = 0, start = (new Date()).getTime();
while ($processChunk(this$static.d.chunker)) {
if (++i % 1000 == 0 && (new Date()).getTime() - start > 200) {
if (has_progress) {
percent = toDouble(this$static.d.chunker.decoder.nowPos64) / len;
/// If about 200 miliseconds have passed, update the progress.
on_progress(percent);
}
///NOTE: This allows other code to run, like the browser to update.
wait(do_action, 0);
return 0;
}
}
on_progress(1);
res = decode($toByteArray(this$static.d.output));
/// delay so we don’t catch errors from the on_finish handler
wait(on_finish.bind(null, res), 0);
} catch (err) {
on_finish(null, err);
}
}
///NOTE: We need to wait to make sure it is always async.
wait(do_action, 0);
}
/** de */
/// If we're in a Web Worker, create the onmessage() communication channel.
///NOTE: This seems to be the most reliable way to detect this.
if (typeof onmessage != "undefined" && (typeof window == "undefined" || typeof window.document == "undefined")) {
(function () {
/* jshint -W020 */
/// Create the global onmessage function.
onmessage = function (e) {
if (e && e.data) {
/// co:if (e.data.action == action_compress) {
/// co: LZMA.compress(e.data.data, e.data.mode, e.data.cbn);
/// co:}
if (e.data.action == action_decompress) {
LZMA.decompress(e.data.data, e.data.cbn);
}
}
};
}());
}
return {
/// co:compress: compress
decompress: decompress
};
}());
/// This is used by browsers that do not support web workers (and possibly Node.js).
this.LZMA = this.LZMA_WORKER = LZMA;