private static int getBits(int arg0, BZip2BlockEntry arg1)
{
int i;
do
{
if (arg1.afe >= arg0)
{
int j = arg1.afd >> arg1.afe - arg0 & (1 << arg0) - 1;
arg1.afe -= arg0;
i = j;
break;
}
arg1.afd = arg1.afd << 8 | arg1.inputBuffer[arg1.offset] & 0xff;
arg1.afe += 8;
arg1.offset++;
arg1.compressedSize--;
arg1.aeh++;
if (arg1.aeh == 0)
{
arg1.aei++;
}
} while (true);
return(i);
}
private static void createMaps(BZip2BlockEntry arg0)
{
arg0.inUseOffset = 0;
for (int i = 0; i < 256; i++)
{
if (arg0.inUse[i])
{
arg0.seqToUnseq[arg0.inUseOffset] = (byte)i;
arg0.inUseOffset++;
}
}
}
public static long unpackData(sbyte[] abyte0, int decompressedSize, sbyte[] abyte1, int j, int k)
{
BZip2BlockEntry blockEntry = new BZip2BlockEntry();
blockEntry.inputBuffer = abyte1;
blockEntry.offset = k;
blockEntry.outputBuffer = abyte0;
blockEntry.aek = 0;
blockEntry.compressedSize = j;
blockEntry.decompressedSize = decompressedSize;
blockEntry.afe = 0;
blockEntry.afd = 0;
blockEntry.aeh = 0;
blockEntry.aei = 0;
blockEntry.aem = 0;
blockEntry.aen = 0;
blockEntry.afg = 0;
readBlock(blockEntry);
decompressedSize -= blockEntry.decompressedSize;
return(decompressedSize);
}
private static sbyte getBit(BZip2BlockEntry o1)
{
return((sbyte)getBits(1, o1));
}
private static void glk(BZip2BlockEntry arg0)
{
sbyte sbyte4 = arg0.afa;
int i = arg0.afb;
int j = arg0.afl;
int k = arg0.afj;
int[] ai = BZip2BlockEntry.aga;
int l = arg0.afi;
sbyte[] abyte0 = arg0.outputBuffer;
int i1 = arg0.aek;
int j1 = arg0.decompressedSize;
int k1 = j1;
int l1 = arg0.aha + 1;
// label0:
do
{
if (i > 0)
{
do
{
if (j1 == 0)
{
goto done;
}
if (i == 1)
{
break;
}
abyte0[i1] = sbyte4;
i--;
i1++;
j1--;
} while (true);
if (j1 == 0)
{
i = 1;
break;
}
abyte0[i1] = sbyte4;
i1++;
j1--;
}
bool flag = true;
while (flag)
{
flag = false;
if (j == l1)
{
i = 0;
goto done;
}
sbyte4 = (sbyte)k;
l = ai[l];
byte sbyte0 = (byte)(l & 0xff);
l >>= 8;
j++;
if (sbyte0 != k)
{
k = sbyte0;
if (j1 == 0)
{
i = 1;
}
else
{
abyte0[i1] = sbyte4;
i1++;
j1--;
flag = true;
continue;
}
goto done;
}
if (j != l1)
{
continue;
}
if (j1 == 0)
{
i = 1;
goto done;
}
abyte0[i1] = sbyte4;
i1++;
j1--;
flag = true;
}
i = 2;
l = ai[l];
byte sbyte1 = (byte)(l & 0xff);
l >>= 8;
if (++j != l1)
{
if (sbyte1 != k)
{
k = sbyte1;
}
else
{
i = 3;
l = ai[l];
byte sbyte2 = (byte)(l & 0xff);
l >>= 8;
if (++j != l1)
{
if (sbyte2 != k)
{
k = sbyte2;
}
else
{
l = ai[l];
byte sbyte3 = (byte)(l & 0xff);
l >>= 8;
j++;
i = (sbyte3 & 0xff) + 4;
l = ai[l];
k = (l & 0xff);
l >>= 8;
j++;
}
}
}
}
} while (true);
done:
int i2 = arg0.aem;
arg0.aem += k1 - j1;
if (arg0.aem < i2)
{
arg0.aen++;
}
arg0.afa = sbyte4;
arg0.afb = i;
arg0.afl = j;
arg0.afj = k;
BZip2BlockEntry.aga = ai;
arg0.afi = l;
arg0.outputBuffer = abyte0;
arg0.aek = i1;
arg0.decompressedSize = j1;
}
private static void readBlock(BZip2BlockEntry blockEntry)
{
int minLens_zt = 0;
int[] limit_zt = null;
int[] base_zt = null;
int[] perm_zt = null;
blockEntry.blockSize100k = 1;
if (BZip2BlockEntry.aga == null)
{
BZip2BlockEntry.aga = new int[blockEntry.blockSize100k * 0x186a0];
}
bool flag19 = true;
while (flag19)
{
sbyte tmpRegister = getUByte(blockEntry);
if (tmpRegister == 23)
{
return;
}
tmpRegister = getUByte(blockEntry);
tmpRegister = getUByte(blockEntry);
tmpRegister = getUByte(blockEntry);
tmpRegister = getUByte(blockEntry);
tmpRegister = getUByte(blockEntry);
blockEntry.afg++;
tmpRegister = getUByte(blockEntry);
tmpRegister = getUByte(blockEntry);
tmpRegister = getUByte(blockEntry);
tmpRegister = getUByte(blockEntry);
tmpRegister = getBit(blockEntry);
if (tmpRegister != 0)
{
blockEntry.afc = true;
}
else
{
blockEntry.afc = false;
}
if (blockEntry.afc)
{
Console.WriteLine("PANIC! RANDOMISED BLOCK!");
}
blockEntry.origPtr = 0;
tmpRegister = getUByte(blockEntry);
blockEntry.origPtr = blockEntry.origPtr << 8 | tmpRegister & 0xff;
tmpRegister = getUByte(blockEntry);
blockEntry.origPtr = blockEntry.origPtr << 8 | tmpRegister & 0xff;
tmpRegister = getUByte(blockEntry);
blockEntry.origPtr = blockEntry.origPtr << 8 | tmpRegister & 0xff;
for (int j = 0; j < 16; j++)
{
sbyte sbyte1 = getBit(blockEntry);
if (sbyte1 == 1)
{
blockEntry.inUse16[j] = true;
}
else
{
blockEntry.inUse16[j] = false;
}
}
for (int k = 0; k < 256; k++)
{
blockEntry.inUse[k] = false;
}
for (int l = 0; l < 16; l++)
{
if (blockEntry.inUse16[l])
{
for (int i3 = 0; i3 < 16; i3++)
{
sbyte sbyte2 = getBit(blockEntry);
if (sbyte2 == 1)
{
blockEntry.inUse[l * 16 + i3] = true;
}
}
}
}
createMaps(blockEntry);
int alphaSize = blockEntry.inUseOffset + 2;
int groupCount = getBits(3, blockEntry);
int selectorCount = getBits(15, blockEntry);
for (int i1 = 0; i1 < selectorCount; i1++)
{
int j3 = 0;
do
{
sbyte sbyte3 = getBit(blockEntry);
if (sbyte3 == 0)
{
break;
}
j3++;
} while (true);
blockEntry.selectorMtf[i1] = (sbyte)j3;
//blockEntry.selectorMtf[i1] = (byte)j3;
}
sbyte[] pos = new sbyte[6];
for (sbyte sbyte16 = 0; sbyte16 < groupCount; sbyte16++)
{
pos[sbyte16] = sbyte16;
}
for (int j1 = 0; j1 < selectorCount; j1++)
{
sbyte sbyte17 = blockEntry.selectorMtf[j1];
sbyte sbyte15 = pos[sbyte17];
for (; sbyte17 > 0; sbyte17--)
{
pos[sbyte17] = pos[sbyte17 - 1];
}
pos[0] = sbyte15;
blockEntry.selector[j1] = sbyte15;
}
for (int k3 = 0; k3 < groupCount; k3++)
{
int l6 = getBits(5, blockEntry);
for (int k1 = 0; k1 < alphaSize; k1++)
{
do
{
sbyte sbyte4 = getBit(blockEntry);
if (sbyte4 == 0)
{
break;
}
sbyte4 = getBit(blockEntry);
if (sbyte4 == 0)
{
l6++;
}
else
{
l6--;
}
} while (true);
blockEntry.len[k3][k1] = (sbyte)l6;
}
}
for (int l3 = 0; l3 < groupCount; l3++)
{
sbyte minlen = 32;
int maxlen = 0;
for (int l1 = 0; l1 < alphaSize; l1++)
{
if (blockEntry.len[l3][l1] > maxlen)
{
maxlen = blockEntry.len[l3][l1];
}
if (blockEntry.len[l3][l1] < minlen)
{
minlen = (sbyte)blockEntry.len[l3][l1];
}
}
createDecodeTables(blockEntry.limit[l3], blockEntry._base[l3], blockEntry.perm[l3], blockEntry.len[l3], minlen, maxlen, alphaSize);
blockEntry.agn[l3] = minlen;
}
int l4 = blockEntry.inUseOffset + 1;
int lastShadow = -1;
int groupPos = 0;
for (int i2 = 0; i2 <= 255; i2++)
{
blockEntry.unzftab[i2] = 0;
}
int j9 = 4095;
for (int l8 = 15; l8 >= 0; l8--)
{
for (int i9 = 15; i9 >= 0; i9--)
{
blockEntry.yy[j9] = (byte)(l8 * 16 + i9);
j9--;
}
blockEntry.agg[l8] = j9 + 1;
}
int i6 = 0;
if (groupPos == 0)
{
lastShadow++;
groupPos = 50;
sbyte sbyte12 = blockEntry.selector[lastShadow];
minLens_zt = blockEntry.agn[sbyte12];
limit_zt = blockEntry.limit[sbyte12];
perm_zt = blockEntry.perm[sbyte12];
base_zt = blockEntry._base[sbyte12];
}
groupPos--;
int i7 = minLens_zt;
int l7;
sbyte sbyte9;
for (l7 = getBits(i7, blockEntry); l7 > limit_zt[i7]; l7 = l7 << 1 | sbyte9)
{
i7++;
sbyte9 = getBit(blockEntry);
}
for (int nextSym = perm_zt[l7 - base_zt[i7]]; nextSym != l4;)
{
if (nextSym == 0 || nextSym == 1)
{
int j6 = -1;
int k6 = 1;
do
{
if (nextSym == 0)
{
j6 += k6;
}
else
{
if (nextSym == 1)
{
j6 += 2 * k6;
}
}
k6 *= 2;
if (groupPos == 0)
{
lastShadow++;
groupPos = 50;
sbyte sbyte13 = blockEntry.selector[lastShadow];
minLens_zt = blockEntry.agn[sbyte13];
limit_zt = blockEntry.limit[sbyte13];
perm_zt = blockEntry.perm[sbyte13];
base_zt = blockEntry._base[sbyte13];
}
groupPos--;
int j7 = minLens_zt;
int i8;
sbyte sbyte10;
for (i8 = getBits(j7, blockEntry); i8 > limit_zt[j7]; i8 = i8 << 1 | (byte)sbyte10)
{
j7++;
sbyte10 = getBit(blockEntry);
}
nextSym = perm_zt[i8 - base_zt[j7]];
} while (nextSym == 0 || nextSym == 1);
j6++;
sbyte sbyte5 = (sbyte)blockEntry.seqToUnseq[blockEntry.yy[blockEntry.agg[0]] & 0xff];
blockEntry.unzftab[sbyte5 & 0xff] += j6;
for (; j6 > 0; j6--)
{
BZip2BlockEntry.aga[i6] = sbyte5 & 0xff;
i6++;
}
}
else
{
int j11 = nextSym - 1;
sbyte sbyte6;
if (j11 < 16)
{
int j10 = blockEntry.agg[0];
sbyte6 = (sbyte)blockEntry.yy[j10 + j11];
for (; j11 > 3; j11 -= 4)
{
int k11 = j10 + j11;
blockEntry.yy[k11] = blockEntry.yy[k11 - 1];
blockEntry.yy[k11 - 1] = blockEntry.yy[k11 - 2];
blockEntry.yy[k11 - 2] = blockEntry.yy[k11 - 3];
blockEntry.yy[k11 - 3] = blockEntry.yy[k11 - 4];
}
for (; j11 > 0; j11--)
{
blockEntry.yy[j10 + j11] = blockEntry.yy[(j10 + j11) - 1];
}
blockEntry.yy[j10] = sbyte6;
}
else
{
int l10 = j11 / 16;
int i11 = j11 % 16;
int k10 = blockEntry.agg[l10] + i11;
sbyte6 = (sbyte)blockEntry.yy[k10];
for (; k10 > blockEntry.agg[l10]; k10--)
{
blockEntry.yy[k10] = blockEntry.yy[k10 - 1];
}
blockEntry.agg[l10]++;
for (; l10 > 0; l10--)
{
blockEntry.agg[l10]--;
blockEntry.yy[blockEntry.agg[l10]] = blockEntry.yy[(blockEntry.agg[l10 - 1] + 16) - 1];
}
blockEntry.agg[0]--;
blockEntry.yy[blockEntry.agg[0]] = sbyte6;
if (blockEntry.agg[0] == 0)
{
int i10 = 4095;
for (int k9 = 15; k9 >= 0; k9--)
{
for (int l9 = 15; l9 >= 0; l9--)
{
blockEntry.yy[i10] = blockEntry.yy[blockEntry.agg[k9] + l9];
i10--;
}
blockEntry.agg[k9] = i10 + 1;
}
}
}
blockEntry.unzftab[blockEntry.seqToUnseq[sbyte6 & 0xff] & 0xff]++;
BZip2BlockEntry.aga[i6] = blockEntry.seqToUnseq[sbyte6 & 0xff] & 0xff;
i6++;
if (groupPos == 0)
{
lastShadow++;
groupPos = 50;
sbyte sbyte14 = blockEntry.selector[lastShadow];
minLens_zt = blockEntry.agn[sbyte14];
limit_zt = blockEntry.limit[sbyte14];
perm_zt = blockEntry.perm[sbyte14];
base_zt = blockEntry._base[sbyte14];
}
groupPos--;
int k7 = minLens_zt;
int j8;
sbyte sbyte11;
for (j8 = getBits(k7, blockEntry); j8 > limit_zt[k7]; j8 = j8 << 1 | sbyte11)
{
k7++;
sbyte11 = getBit(blockEntry);
}
nextSym = perm_zt[j8 - base_zt[k7]];
}
}
blockEntry.afb = 0;
blockEntry.afa = 0;
blockEntry.afm[0] = 0;
for (int j2 = 1; j2 <= 256; j2++)
{
blockEntry.afm[j2] = blockEntry.unzftab[j2 - 1];
}
for (int k2 = 1; k2 <= 256; k2++)
{
blockEntry.afm[k2] += blockEntry.afm[k2 - 1];
}
for (int l2 = 0; l2 < i6; l2++)
{
int sbyte7 = ((BZip2BlockEntry.aga[l2]) & 0xff);
BZip2BlockEntry.aga[blockEntry.afm[sbyte7 & 0xff]] |= l2 << 8;
blockEntry.afm[sbyte7 & 0xff]++;
}
blockEntry.afi = BZip2BlockEntry.aga[blockEntry.origPtr] >> 8;
blockEntry.afl = 0;
blockEntry.afi = BZip2BlockEntry.aga[blockEntry.afi];
blockEntry.afj = (blockEntry.afi & 0xff);
blockEntry.afi >>= 8;
blockEntry.afl++;
blockEntry.aha = i6;
glk(blockEntry);
if (blockEntry.afl == blockEntry.aha + 1 && blockEntry.afb == 0)
{
flag19 = true;
}
else
{
flag19 = false;
}
}
}