mirror of
https://github.com/janeczku/calibre-web
synced 2024-11-24 18:47:23 +00:00
Code cosmetics unrar
This commit is contained in:
OzzieIsaacs
parent
d2ea10e90e
commit
7dac87fa5d
@ -160,7 +160,7 @@ var RarVolumeHeader = function(bstream) {
|
||||
// read in filename
|
||||
|
||||
this.filename = bstream.readBytes(this.nameSize);
|
||||
var _s = ""
|
||||
var _s = "";
|
||||
for (var _i = 0; _i < this.filename.length ; _i++) {
|
||||
_s += String.fromCharCode(this.filename[_i]);
|
||||
}
|
||||
@ -313,7 +313,7 @@ function RarReadTables(bstream) {
|
||||
//console.log(DecodeLen, DecodePos, DecodeNum);
|
||||
for (i = 0; i < TableSize;) {
|
||||
var N;
|
||||
var num = RarDecodeNumber(bstream, BD);
|
||||
var num = rarDecodeNumber(bstream, BD);
|
||||
if (num < 16) {
|
||||
Table[i] = (num + UnpOldTable[i]) & 0xf;
|
||||
i++;
|
||||
@ -345,7 +345,7 @@ function RarReadTables(bstream) {
|
||||
}
|
||||
|
||||
|
||||
function RarDecodeNumber(bstream, dec) {
|
||||
function rarDecodeNumber(bstream, dec) {
|
||||
var DecodeLen = dec.DecodeLen, DecodePos = dec.DecodePos, DecodeNum = dec.DecodeNum;
|
||||
var bitField = bstream.getBits() & 0xfffe;
|
||||
//some sort of rolled out binary search
|
||||
@ -365,7 +365,7 @@ function RarDecodeNumber(bstream, dec) {
|
||||
((bitField < DecodeLen[13]) ? 13 : 14)
|
||||
: 15));
|
||||
bstream.readBits(bits);
|
||||
var N = DecodePos[bits] + ((bitField - DecodeLen[bits -1]) >>> (16 - bits));
|
||||
var N = DecodePos[bits] + ((bitField - DecodeLen[bits - 1]) >>> (16 - bits));
|
||||
|
||||
return DecodeNum[N];
|
||||
}
|
||||
@ -373,11 +373,12 @@ function RarDecodeNumber(bstream, dec) {
|
||||
|
||||
function rarMakeDecodeTables(BitLength, offset, dec, size) {
|
||||
var DecodeLen = dec.DecodeLen, DecodePos = dec.DecodePos, DecodeNum = dec.DecodeNum;
|
||||
var LenCount = [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],
|
||||
TmpPos = [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],
|
||||
var LenCount = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
|
||||
TmpPos = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
|
||||
N = 0, M = 0;
|
||||
for (var i = DecodeNum.length; i--;) DecodeNum[i] = 0;
|
||||
for (var i = 0; i < size; i++) {
|
||||
var i;
|
||||
for (i = DecodeNum.length; i--;) DecodeNum[i] = 0;
|
||||
for (i = 0; i < size; i++) {
|
||||
LenCount[BitLength[i + offset] & 0xF]++;
|
||||
}
|
||||
LenCount[0] = 0;
|
||||
@ -385,34 +386,43 @@ function rarMakeDecodeTables(BitLength, offset, dec, size) {
|
||||
DecodePos[0] = 0;
|
||||
DecodeLen[0] = 0;
|
||||
|
||||
for (var I = 1; I < 16; ++I) {
|
||||
var I;
|
||||
for (I = 1; I < 16; ++I) {
|
||||
N = 2 * (N + LenCount[I]);
|
||||
M = (N << (15-I));
|
||||
if (M > 0xFFFF)
|
||||
M = (N << (15 - I));
|
||||
if (M > 0xFFFF){
|
||||
M = 0xFFFF;
|
||||
}
|
||||
DecodeLen[I] = M;
|
||||
DecodePos[I] = DecodePos[I-1] + LenCount[I-1];
|
||||
DecodePos[I] = DecodePos[I - 1] + LenCount[I - 1];
|
||||
TmpPos[I] = DecodePos[I];
|
||||
}
|
||||
for (I = 0; I < size; ++I) {
|
||||
if (BitLength[I + offset] != 0) {
|
||||
if (BitLength[I + offset] !== 0) {
|
||||
DecodeNum[ TmpPos[ BitLength[offset + I] & 0xF ]++] = I;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// TODO: implement
|
||||
function Unpack15(bstream, Solid) {
|
||||
function Unpack15() { //bstream, Solid) {
|
||||
info("ERROR! RAR 1.5 compression not supported");
|
||||
}
|
||||
|
||||
function Unpack20(bstream, Solid) {
|
||||
var lowDistRepCount = 0, prevLowDist = 0;
|
||||
|
||||
var rOldDist = [0, 0, 0, 0];
|
||||
|
||||
var lastDist = 0;
|
||||
var lastLength = 0;
|
||||
|
||||
function Unpack20(bstream) { //, Solid) {
|
||||
var destUnpSize = rBuffer.data.length;
|
||||
var oldDistPtr = 0;
|
||||
|
||||
RarReadTables20(bstream);
|
||||
rarReadTables20(bstream);
|
||||
while (destUnpSize > rBuffer.ptr) {
|
||||
var num = RarDecodeNumber(bstream, LD);
|
||||
var num = rarDecodeNumber(bstream, LD);
|
||||
var Bits;
|
||||
if (num < 256) {
|
||||
rBuffer.insertByte(num);
|
||||
continue;
|
||||
@ -422,35 +432,35 @@ function Unpack20(bstream, Solid) {
|
||||
if ((Bits = rLBits[num]) > 0) {
|
||||
Length += bstream.readBits(Bits);
|
||||
}
|
||||
var DistNumber = RarDecodeNumber(bstream, DD);
|
||||
var DistNumber = rarDecodeNumber(bstream, DD);
|
||||
var Distance = rDDecode[DistNumber] + 1;
|
||||
if ((Bits = rDBits[DistNumber]) > 0) {
|
||||
Distance += bstream.readBits(Bits);
|
||||
}
|
||||
if (Distance >= 0x2000) {
|
||||
Length++;
|
||||
if(Distance >= 0x40000) Length++;
|
||||
if (Distance >= 0x40000) Length++;
|
||||
}
|
||||
lastLength = Length;
|
||||
lastDist = rOldDist[oldDistPtr++ & 3] = Distance;
|
||||
RarCopyString(Length, Distance);
|
||||
rarCopyString(Length, Distance);
|
||||
continue;
|
||||
}
|
||||
if (num === 269) {
|
||||
RarReadTables20(bstream);
|
||||
rarReadTables20(bstream);
|
||||
|
||||
RarUpdateProgress()
|
||||
rarUpdateProgress();
|
||||
|
||||
continue;
|
||||
}
|
||||
if (num === 256) {
|
||||
lastDist = rOldDist[oldDistPtr++ & 3] = lastDist;
|
||||
RarCopyString(lastLength, lastDist);
|
||||
rarCopyString(lastLength, lastDist);
|
||||
continue;
|
||||
}
|
||||
if (num < 261) {
|
||||
var Distance = rOldDist[(oldDistPtr - (num - 256)) & 3];
|
||||
var LengthNumber = RarDecodeNumber(bstream, RD);
|
||||
var LengthNumber = rarDecodeNumber(bstream, RD);
|
||||
var Length = rLDecode[LengthNumber] +2;
|
||||
if ((Bits = rLBits[LengthNumber]) > 0) {
|
||||
Length += bstream.readBits(Bits);
|
||||
@ -464,7 +474,7 @@ function Unpack20(bstream, Solid) {
|
||||
}
|
||||
lastLength = Length;
|
||||
lastDist = rOldDist[oldDistPtr++ & 3] = Distance;
|
||||
RarCopyString(Length, Distance);
|
||||
rarCopyString(Length, Distance);
|
||||
continue;
|
||||
}
|
||||
if (num < 270) {
|
||||
@ -474,14 +484,14 @@ function Unpack20(bstream, Solid) {
|
||||
}
|
||||
lastLength = 2;
|
||||
lastDist = rOldDist[oldDistPtr++ & 3] = Distance;
|
||||
RarCopyString(2, Distance);
|
||||
rarCopyString(2, Distance);
|
||||
continue;
|
||||
}
|
||||
}
|
||||
RarUpdateProgress()
|
||||
rarUpdateProgress()
|
||||
}
|
||||
|
||||
function RarUpdateProgress() {
|
||||
function rarUpdateProgress() {
|
||||
var change = rBuffer.ptr - currentBytesUnarchivedInFile;
|
||||
currentBytesUnarchivedInFile = rBuffer.ptr;
|
||||
currentBytesUnarchived += change;
|
||||
@ -497,7 +507,7 @@ var rNC20 = 298,
|
||||
|
||||
var UnpOldTable20 = new Array(rMC20 * 4);
|
||||
|
||||
function RarReadTables20(bstream) {
|
||||
function rarReadTables20(bstream) {
|
||||
var BitLength = new Array(rBC20);
|
||||
var Table = new Array(rMC20 * 4);
|
||||
var TableSize, N, I;
|
||||
@ -510,7 +520,7 @@ function RarReadTables20(bstream) {
|
||||
rarMakeDecodeTables(BitLength, 0, BD, rBC20);
|
||||
I = 0;
|
||||
while (I < TableSize) {
|
||||
var num = RarDecodeNumber(bstream, BD);
|
||||
var num = rarDecodeNumber(bstream, BD);
|
||||
if (num < 16) {
|
||||
Table[I] = num + UnpOldTable20[I] & 0xf;
|
||||
I++;
|
||||
@ -537,12 +547,6 @@ function RarReadTables20(bstream) {
|
||||
for (var i = UnpOldTable20.length; i--;) UnpOldTable20[i] = Table[i];
|
||||
}
|
||||
|
||||
var lowDistRepCount = 0, prevLowDist = 0;
|
||||
|
||||
var rOldDist = [0,0,0,0];
|
||||
var lastDist;
|
||||
var lastLength;
|
||||
|
||||
|
||||
function Unpack29(bstream, Solid) {
|
||||
// lazy initialize rDDecode and rDBits
|
||||
@ -562,7 +566,7 @@ function Unpack29(bstream, Solid) {
|
||||
var Bits;
|
||||
//tablesRead = false;
|
||||
|
||||
rOldDist = [0,0,0,0]
|
||||
rOldDist = [0, 0, 0, 0]
|
||||
|
||||
lastDist = 0;
|
||||
lastLength = 0;
|
||||
@ -573,7 +577,7 @@ function Unpack29(bstream, Solid) {
|
||||
RarReadTables(bstream);
|
||||
|
||||
while (true) {
|
||||
var num = RarDecodeNumber(bstream, LD);
|
||||
var num = rarDecodeNumber(bstream, LD);
|
||||
|
||||
if (num < 256) {
|
||||
rBuffer.insertByte(num);
|
||||
@ -584,7 +588,7 @@ function Unpack29(bstream, Solid) {
|
||||
if ((Bits = rLBits[num]) > 0) {
|
||||
Length += bstream.readBits(Bits);
|
||||
}
|
||||
var DistNumber = RarDecodeNumber(bstream, DD);
|
||||
var DistNumber = rarDecodeNumber(bstream, DD);
|
||||
var Distance = DDecode[DistNumber]+1;
|
||||
if ((Bits = DBits[DistNumber]) > 0) {
|
||||
if (DistNumber > 9) {
|
||||
@ -597,7 +601,7 @@ function Unpack29(bstream, Solid) {
|
||||
lowDistRepCount--;
|
||||
Distance += prevLowDist;
|
||||
} else {
|
||||
var LowDist = RarDecodeNumber(bstream, LDD);
|
||||
var LowDist = rarDecodeNumber(bstream, LDD);
|
||||
if (LowDist === 16) {
|
||||
lowDistRepCount = rLowDistRepCount - 1;
|
||||
Distance += prevLowDist;
|
||||
@ -618,7 +622,7 @@ function Unpack29(bstream, Solid) {
|
||||
}
|
||||
RarInsertOldDist(Distance);
|
||||
RarInsertLastMatch(Length, Distance);
|
||||
RarCopyString(Length, Distance);
|
||||
rarCopyString(Length, Distance);
|
||||
continue;
|
||||
}
|
||||
if (num === 256) {
|
||||
@ -632,7 +636,7 @@ function Unpack29(bstream, Solid) {
|
||||
}
|
||||
if (num === 258) {
|
||||
if (lastLength != 0) {
|
||||
RarCopyString(lastLength, lastDist);
|
||||
rarCopyString(lastLength, lastDist);
|
||||
}
|
||||
continue;
|
||||
}
|
||||
@ -645,13 +649,13 @@ function Unpack29(bstream, Solid) {
|
||||
}
|
||||
rOldDist[0] = Distance;
|
||||
|
||||
var LengthNumber = RarDecodeNumber(bstream, RD);
|
||||
var LengthNumber = rarDecodeNumber(bstream, RD);
|
||||
var Length = rLDecode[LengthNumber] + 2;
|
||||
if ((Bits = rLBits[LengthNumber]) > 0) {
|
||||
Length += bstream.readBits(Bits);
|
||||
}
|
||||
RarInsertLastMatch(Length, Distance);
|
||||
RarCopyString(Length, Distance);
|
||||
rarCopyString(Length, Distance);
|
||||
continue;
|
||||
}
|
||||
if (num < 272) {
|
||||
@ -661,16 +665,16 @@ function Unpack29(bstream, Solid) {
|
||||
}
|
||||
RarInsertOldDist(Distance);
|
||||
RarInsertLastMatch(2, Distance);
|
||||
RarCopyString(2, Distance);
|
||||
rarCopyString(2, Distance);
|
||||
continue;
|
||||
}
|
||||
}
|
||||
RarUpdateProgress()
|
||||
rarUpdateProgress()
|
||||
}
|
||||
|
||||
function RarReadEndOfBlock(bstream) {
|
||||
|
||||
RarUpdateProgress()
|
||||
rarUpdateProgress()
|
||||
|
||||
var NewTable = false, NewFile = false;
|
||||
if (bstream.readBits(1)) {
|
||||
@ -719,7 +723,7 @@ function RarInsertOldDist(distance) {
|
||||
}
|
||||
|
||||
//this is the real function, the other one is for debugging
|
||||
function RarCopyString(length, distance) {
|
||||
function rarCopyString(length, distance) {
|
||||
var destPtr = rBuffer.ptr - distance;
|
||||
if(destPtr < 0){
|
||||
var l = rOldBuffers.length;
|
||||
@ -751,11 +755,11 @@ function unpack(v) {
|
||||
|
||||
switch(Ver) {
|
||||
case 15: // rar 1.5 compression
|
||||
Unpack15(bstream, Solid);
|
||||
Unpack15(); //(bstream, Solid);
|
||||
break;
|
||||
case 20: // rar 2.x compression
|
||||
case 26: // files larger than 2GB
|
||||
Unpack20(bstream, Solid);
|
||||
Unpack20(bstream); //, Solid);
|
||||
break;
|
||||
case 29: // rar 3.x compression
|
||||
case 36: // alternative hash
|
||||
|
||||
@ -520,7 +520,7 @@ function inflate(compressedData, numDecompressedBytes) {
|
||||
if (bType === 0) {
|
||||
// skip remaining bits in this byte
|
||||
while (bstream.bitPtr !== 0) bstream.readBits(1);
|
||||
var len = bstream.readBits(16),
|
||||
var len = bstream.readBits(16);
|
||||
// nlen = bstream.readBits(16);
|
||||
// TODO: check if nlen is the ones-complement of len?
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user