internal int End()
{
if (this.blocks != null)
{
this.blocks.Free();
}
this.blocks = null;
return(0);
}
internal int Initialize(ZlibCodec codec, int w)
{
this._codec = codec;
this._codec.Message = null;
this.blocks = null;
if ((w < 8) || (w > 15))
{
this.End();
throw new ZlibException("Bad window size.");
}
this.wbits = w;
this.blocks = new InflateBlocks(codec, !this.HandleRfc1950HeaderBytes ? null : this, 1 << (w & 0x1f));
this.Reset();
return(0);
}
internal int Process(InflateBlocks blocks, int r)
{
int j; // temporary storage
int tindex; // temporary pointer
int e; // extra bits or operation
int b = 0; // bit buffer
int k = 0; // bits in bit buffer
int p = 0; // input data pointer
int n; // bytes available there
int q; // output window write pointer
int m; // bytes to end of window or read pointer
int f; // pointer to copy strings from
ZlibCodec z = blocks._codec;
// copy input/output information to locals (UPDATE macro restores)
p = z.NextIn;
n = z.AvailableBytesIn;
b = blocks.bitb;
k = blocks.bitk;
q = blocks.writeAt;
m = q < blocks.readAt ? blocks.readAt - q - 1 : blocks.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)
{
blocks.bitb = b;
blocks.bitk = k;
z.AvailableBytesIn = n;
z.TotalBytesIn += p - z.NextIn;
z.NextIn = p;
blocks.writeAt = q;
r = InflateFast(lbits, dbits, ltree, ltree_index, dtree, dtree_index, blocks, z);
p = z.NextIn;
n = z.AvailableBytesIn;
b = blocks.bitb;
k = blocks.bitk;
q = blocks.writeAt;
m = q < blocks.readAt ? blocks.readAt - q - 1 : blocks.end - q;
if (r != ZlibConstants.Z_OK)
{
mode = (r == ZlibConstants.Z_STREAM_END) ? WASH : BADCODE;
break;
}
}
need = lbits;
tree = ltree;
tree_index = ltree_index;
mode = LEN;
goto case LEN;
case LEN: // i: get length/literal/eob next
j = need;
while (k < j)
{
if (n != 0)
r = ZlibConstants.Z_OK;
else
{
blocks.bitb = b;
blocks.bitk = k;
z.AvailableBytesIn = n;
z.TotalBytesIn += p - z.NextIn;
z.NextIn = p;
blocks.writeAt = q;
return blocks.Flush(r);
}
n--;
b |= (z.InputBuffer[p++] & 0xff) << k;
k += 8;
}
tindex = (tree_index + (b & InternalInflateConstants.InflateMask[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
bitsToGet = 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.Message = "invalid literal/length code";
r = ZlibConstants.Z_DATA_ERROR;
blocks.bitb = b;
blocks.bitk = k;
z.AvailableBytesIn = n;
z.TotalBytesIn += p - z.NextIn;
z.NextIn = p;
blocks.writeAt = q;
return blocks.Flush(r);
case LENEXT: // i: getting length extra (have base)
j = bitsToGet;
while (k < j)
{
if (n != 0)
r = ZlibConstants.Z_OK;
else
{
blocks.bitb = b;
blocks.bitk = k;
z.AvailableBytesIn = n;
z.TotalBytesIn += p - z.NextIn;
z.NextIn = p;
blocks.writeAt = q;
return blocks.Flush(r);
}
n--;
b |= (z.InputBuffer[p++] & 0xff) << k;
k += 8;
}
len += (b & InternalInflateConstants.InflateMask[j]);
b >>= j;
k -= j;
need = dbits;
tree = dtree;
tree_index = dtree_index;
mode = DIST;
goto case DIST;
case DIST: // i: get distance next
j = need;
while (k < j)
{
if (n != 0)
r = ZlibConstants.Z_OK;
else
{
blocks.bitb = b;
blocks.bitk = k;
z.AvailableBytesIn = n;
z.TotalBytesIn += p - z.NextIn;
z.NextIn = p;
blocks.writeAt = q;
return blocks.Flush(r);
}
n--;
b |= (z.InputBuffer[p++] & 0xff) << k;
k += 8;
}
tindex = (tree_index + (b & InternalInflateConstants.InflateMask[j])) * 3;
b >>= tree[tindex + 1];
k -= tree[tindex + 1];
e = (tree[tindex]);
if ((e & 0x10) != 0)
{
// distance
bitsToGet = 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.Message = "invalid distance code";
r = ZlibConstants.Z_DATA_ERROR;
blocks.bitb = b;
blocks.bitk = k;
z.AvailableBytesIn = n;
z.TotalBytesIn += p - z.NextIn;
z.NextIn = p;
blocks.writeAt = q;
return blocks.Flush(r);
case DISTEXT: // i: getting distance extra
j = bitsToGet;
while (k < j)
{
if (n != 0)
r = ZlibConstants.Z_OK;
else
{
blocks.bitb = b;
blocks.bitk = k;
z.AvailableBytesIn = n;
z.TotalBytesIn += p - z.NextIn;
z.NextIn = p;
blocks.writeAt = q;
return blocks.Flush(r);
}
n--;
b |= (z.InputBuffer[p++] & 0xff) << k;
k += 8;
}
dist += (b & InternalInflateConstants.InflateMask[j]);
b >>= j;
k -= j;
mode = COPY;
goto case COPY;
case COPY: // o: copying bytes in window, waiting for space
f = q - dist;
while (f < 0)
{
// modulo window size-"while" instead
f += blocks.end; // of "if" handles invalid distances
}
while (len != 0)
{
if (m == 0)
{
if (q == blocks.end && blocks.readAt != 0)
{
q = 0;
m = q < blocks.readAt ? blocks.readAt - q - 1 : blocks.end - q;
}
if (m == 0)
{
blocks.writeAt = q;
r = blocks.Flush(r);
q = blocks.writeAt;
m = q < blocks.readAt ? blocks.readAt - q - 1 : blocks.end - q;
if (q == blocks.end && blocks.readAt != 0)
{
q = 0;
m = q < blocks.readAt ? blocks.readAt - q - 1 : blocks.end - q;
}
if (m == 0)
{
blocks.bitb = b;
blocks.bitk = k;
z.AvailableBytesIn = n;
z.TotalBytesIn += p - z.NextIn;
z.NextIn = p;
blocks.writeAt = q;
return blocks.Flush(r);
}
}
}
blocks.window[q++] = blocks.window[f++];
m--;
if (f == blocks.end)
f = 0;
len--;
}
mode = START;
break;
case LIT: // o: got literal, waiting for output space
if (m == 0)
{
if (q == blocks.end && blocks.readAt != 0)
{
q = 0;
m = q < blocks.readAt ? blocks.readAt - q - 1 : blocks.end - q;
}
if (m == 0)
{
blocks.writeAt = q;
r = blocks.Flush(r);
q = blocks.writeAt;
m = q < blocks.readAt ? blocks.readAt - q - 1 : blocks.end - q;
if (q == blocks.end && blocks.readAt != 0)
{
q = 0;
m = q < blocks.readAt ? blocks.readAt - q - 1 : blocks.end - q;
}
if (m == 0)
{
blocks.bitb = b;
blocks.bitk = k;
z.AvailableBytesIn = n;
z.TotalBytesIn += p - z.NextIn;
z.NextIn = p;
blocks.writeAt = q;
return blocks.Flush(r);
}
}
}
r = ZlibConstants.Z_OK;
blocks.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
}
blocks.writeAt = q;
r = blocks.Flush(r);
q = blocks.writeAt;
m = q < blocks.readAt ? blocks.readAt - q - 1 : blocks.end - q;
if (blocks.readAt != blocks.writeAt)
{
blocks.bitb = b;
blocks.bitk = k;
z.AvailableBytesIn = n;
z.TotalBytesIn += p - z.NextIn;
z.NextIn = p;
blocks.writeAt = q;
return blocks.Flush(r);
}
mode = END;
goto case END;
case END:
r = ZlibConstants.Z_STREAM_END;
blocks.bitb = b;
blocks.bitk = k;
z.AvailableBytesIn = n;
z.TotalBytesIn += p - z.NextIn;
z.NextIn = p;
blocks.writeAt = q;
return blocks.Flush(r);
case BADCODE: // x: got error
r = ZlibConstants.Z_DATA_ERROR;
blocks.bitb = b;
blocks.bitk = k;
z.AvailableBytesIn = n;
z.TotalBytesIn += p - z.NextIn;
z.NextIn = p;
blocks.writeAt = q;
return blocks.Flush(r);
default:
r = ZlibConstants.Z_STREAM_ERROR;
blocks.bitb = b;
blocks.bitk = k;
z.AvailableBytesIn = n;
z.TotalBytesIn += p - z.NextIn;
z.NextIn = p;
blocks.writeAt = q;
return blocks.Flush(r);
}
}
}
internal int Initialize(ZlibCodec codec, int w)
{
_codec = codec;
_codec.Message = null;
blocks = null;
// handle undocumented nowrap option (no zlib header or check)
//nowrap = 0;
//if (w < 0)
//{
// w = - w;
// nowrap = 1;
//}
// set window size
if (w < 8 || w > 15)
{
End();
throw new ZlibException("Bad window size.");
//return ZlibConstants.Z_STREAM_ERROR;
}
wbits = w;
blocks = new InflateBlocks(codec,
HandleRfc1950HeaderBytes ? this : null,
1 << w);
// reset state
Reset();
return ZlibConstants.Z_OK;
}
internal int End()
{
if (blocks != null)
blocks.Free();
blocks = null;
return ZlibConstants.Z_OK;
}
// 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.
internal int InflateFast(int bl, int bd, int[] tl, int tl_index, int[] td, int td_index, InflateBlocks s,
ZlibCodec z)
{
int t; // temporary pointer
int[] tp; // temporary pointer
int tp_index; // temporary pointer
int e; // extra bits or operation
int b; // bit buffer
int k; // bits in bit buffer
int p; // input data pointer
int n; // bytes available there
int q; // output window write pointer
int m; // bytes to end of window or read pointer
int ml; // mask for literal/length tree
int md; // mask for distance tree
int c; // bytes to copy
int d; // distance back to copy from
int r; // copy source pointer
int tp_index_t_3; // (tp_index+t)*3
// load input, output, bit values
p = z.NextIn;
n = z.AvailableBytesIn;
b = s.bitb;
k = s.bitk;
q = s.writeAt;
m = q < s.readAt ? s.readAt - q - 1 : s.end - q;
// initialize masks
ml = InternalInflateConstants.InflateMask[bl];
md = InternalInflateConstants.InflateMask[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.InputBuffer[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] + (b & InternalInflateConstants.InflateMask[e]);
b >>= e;
k -= e;
// decode distance base of block to copy
while (k < 15)
{
// max bits for distance code
n--;
b |= (z.InputBuffer[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.InputBuffer[p++] & 0xff) << k;
k += 8;
}
d = tp[tp_index_t_3 + 2] + (b & InternalInflateConstants.InflateMask[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
{
Array.Copy(s.window, r, s.window, q, 2);
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
{
Array.Copy(s.window, r, s.window, q, e);
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
{
Array.Copy(s.window, r, s.window, q, c);
q += c;
r += c;
c = 0;
}
break;
}
else if ((e & 64) == 0)
{
t += tp[tp_index_t_3 + 2];
t += (b & InternalInflateConstants.InflateMask[e]);
tp_index_t_3 = (tp_index + t) * 3;
e = tp[tp_index_t_3];
}
else
{
z.Message = "invalid distance code";
c = z.AvailableBytesIn - n;
c = (k >> 3) < c ? k >> 3 : c;
n += c;
p -= c;
k -= (c << 3);
s.bitb = b;
s.bitk = k;
z.AvailableBytesIn = n;
z.TotalBytesIn += p - z.NextIn;
z.NextIn = p;
s.writeAt = q;
return ZlibConstants.Z_DATA_ERROR;
}
} while (true);
break;
}
if ((e & 64) == 0)
{
t += tp[tp_index_t_3 + 2];
t += (b & InternalInflateConstants.InflateMask[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.AvailableBytesIn - n;
c = (k >> 3) < c ? k >> 3 : c;
n += c;
p -= c;
k -= (c << 3);
s.bitb = b;
s.bitk = k;
z.AvailableBytesIn = n;
z.TotalBytesIn += p - z.NextIn;
z.NextIn = p;
s.writeAt = q;
return ZlibConstants.Z_STREAM_END;
}
else
{
z.Message = "invalid literal/length code";
c = z.AvailableBytesIn - n;
c = (k >> 3) < c ? k >> 3 : c;
n += c;
p -= c;
k -= (c << 3);
s.bitb = b;
s.bitk = k;
z.AvailableBytesIn = n;
z.TotalBytesIn += p - z.NextIn;
z.NextIn = p;
s.writeAt = q;
return ZlibConstants.Z_DATA_ERROR;
}
} while (true);
} while (m >= 258 && n >= 10);
// not enough input or output--restore pointers and return
c = z.AvailableBytesIn - n;
c = (k >> 3) < c ? k >> 3 : c;
n += c;
p -= c;
k -= (c << 3);
s.bitb = b;
s.bitk = k;
z.AvailableBytesIn = n;
z.TotalBytesIn += p - z.NextIn;
z.NextIn = p;
s.writeAt = q;
return ZlibConstants.Z_OK;
}
internal int InflateFast(int bl, int bd, int[] tl, int tl_index, int[] td, int td_index, InflateBlocks s, ZlibCodec z)
{
int nextIn = z.NextIn;
int availableBytesIn = z.AvailableBytesIn;
int bitb = s.bitb;
int bitk = s.bitk;
int writeAt = s.writeAt;
int num9 = (writeAt >= s.readAt) ? (s.end - writeAt) : ((s.readAt - writeAt) - 1);
int num10 = InternalInflateConstants.InflateMask[bl];
int num11 = InternalInflateConstants.InflateMask[bd];
while (true)
{
int num12;
if (bitk < 20)
{
availableBytesIn--;
bitb |= (z.InputBuffer[nextIn++] & 0xff) << (bitk & 0x1f);
bitk += 8;
continue;
}
int num = bitb & num10;
int[] numArray = tl;
int num2 = tl_index;
int index = (num2 + num) * 3;
int num3 = numArray[index];
if (num3 == 0)
{
bitb = bitb >> (numArray[index + 1] & 0x1f);
bitk -= numArray[index + 1];
s.window[writeAt++] = (byte)numArray[index + 2];
num9--;
}
else
{
while (true)
{
bitb = bitb >> (numArray[index + 1] & 0x1f);
bitk -= numArray[index + 1];
if ((num3 & 0x10) == 0)
{
if ((num3 & 0x40) != 0)
{
if ((num3 & 0x20) != 0)
{
num12 = z.AvailableBytesIn - availableBytesIn;
num12 = ((bitk >> 3) >= num12) ? num12 : (bitk >> 3);
availableBytesIn += num12;
nextIn -= num12;
bitk -= num12 << 3;
s.bitb = bitb;
s.bitk = bitk;
z.AvailableBytesIn = availableBytesIn;
z.TotalBytesIn += nextIn - z.NextIn;
z.NextIn = nextIn;
s.writeAt = writeAt;
return(1);
}
z.Message = "invalid literal/length code";
num12 = z.AvailableBytesIn - availableBytesIn;
num12 = ((bitk >> 3) >= num12) ? num12 : (bitk >> 3);
availableBytesIn += num12;
nextIn -= num12;
bitk -= num12 << 3;
s.bitb = bitb;
s.bitk = bitk;
z.AvailableBytesIn = availableBytesIn;
z.TotalBytesIn += nextIn - z.NextIn;
z.NextIn = nextIn;
s.writeAt = writeAt;
return(-3);
}
index = (num2 + ((num + numArray[index + 2]) + (bitb & InternalInflateConstants.InflateMask[num3]))) * 3;
num3 = numArray[index];
if (num3 != 0)
{
continue;
}
bitb = bitb >> (numArray[index + 1] & 0x1f);
bitk -= numArray[index + 1];
s.window[writeAt++] = (byte)numArray[index + 2];
num9--;
}
else
{
num3 &= 15;
num12 = numArray[index + 2] + (bitb & InternalInflateConstants.InflateMask[num3]);
bitb = bitb >> (num3 & 0x1f);
bitk -= num3;
while (true)
{
if (bitk >= 15)
{
num = bitb & num11;
numArray = td;
num2 = td_index;
index = (num2 + num) * 3;
num3 = numArray[index];
while (true)
{
bitb = bitb >> (numArray[index + 1] & 0x1f);
bitk -= numArray[index + 1];
if ((num3 & 0x10) != 0)
{
num3 &= 15;
while (true)
{
if (bitk >= num3)
{
int num14;
int num13 = numArray[index + 2] + (bitb & InternalInflateConstants.InflateMask[num3]);
bitb = bitb >> (num3 & 0x1f);
bitk -= num3;
num9 -= num12;
if (writeAt >= num13)
{
num14 = writeAt - num13;
if (((writeAt - num14) > 0) && (2 > (writeAt - num14)))
{
s.window[writeAt++] = s.window[num14++];
s.window[writeAt++] = s.window[num14++];
num12 -= 2;
}
else
{
Array.Copy(s.window, num14, s.window, writeAt, 2);
writeAt += 2;
num14 += 2;
num12 -= 2;
}
}
else
{
num14 = writeAt - num13;
while (true)
{
num14 += s.end;
if (num14 >= 0)
{
num3 = s.end - num14;
if (num12 > num3)
{
num12 -= num3;
if (((writeAt - num14) <= 0) || (num3 <= (writeAt - num14)))
{
Array.Copy(s.window, num14, s.window, writeAt, num3);
writeAt += num3;
num14 += num3;
num3 = 0;
}
else
{
do
{
s.window[writeAt++] = s.window[num14++];
}while (--num3 != 0);
}
num14 = 0;
}
break;
}
}
}
if (((writeAt - num14) <= 0) || (num12 <= (writeAt - num14)))
{
Array.Copy(s.window, num14, s.window, writeAt, num12);
writeAt += num12;
num14 += num12;
num12 = 0;
}
else
{
do
{
s.window[writeAt++] = s.window[num14++];
}while (--num12 != 0);
}
break;
}
availableBytesIn--;
bitb |= (z.InputBuffer[nextIn++] & 0xff) << (bitk & 0x1f);
bitk += 8;
}
break;
}
if ((num3 & 0x40) != 0)
{
z.Message = "invalid distance code";
num12 = z.AvailableBytesIn - availableBytesIn;
num12 = ((bitk >> 3) >= num12) ? num12 : (bitk >> 3);
availableBytesIn += num12;
nextIn -= num12;
bitk -= num12 << 3;
s.bitb = bitb;
s.bitk = bitk;
z.AvailableBytesIn = availableBytesIn;
z.TotalBytesIn += nextIn - z.NextIn;
z.NextIn = nextIn;
s.writeAt = writeAt;
return(-3);
}
index = (num2 + ((num + numArray[index + 2]) + (bitb & InternalInflateConstants.InflateMask[num3]))) * 3;
num3 = numArray[index];
}
break;
}
availableBytesIn--;
bitb |= (z.InputBuffer[nextIn++] & 0xff) << (bitk & 0x1f);
bitk += 8;
}
}
break;
}
}
if ((num9 < 0x102) || (availableBytesIn < 10))
{
num12 = z.AvailableBytesIn - availableBytesIn;
num12 = ((bitk >> 3) >= num12) ? num12 : (bitk >> 3);
availableBytesIn += num12;
nextIn -= num12;
bitk -= num12 << 3;
s.bitb = bitb;
s.bitk = bitk;
z.AvailableBytesIn = availableBytesIn;
z.TotalBytesIn += nextIn - z.NextIn;
z.NextIn = nextIn;
s.writeAt = writeAt;
return(0);
}
}
}
internal int Process(InflateBlocks blocks, int r)
{
int bitsToGet;
int num2;
int num3;
int bitb = 0;
int bitk = 0;
int nextIn = 0;
ZlibCodec z = blocks._codec;
nextIn = z.NextIn;
int availableBytesIn = z.AvailableBytesIn;
bitb = blocks.bitb;
bitk = blocks.bitk;
int writeAt = blocks.writeAt;
int num9 = (writeAt >= blocks.readAt) ? (blocks.end - writeAt) : ((blocks.readAt - writeAt) - 1);
goto TR_0058;
TR_0011:
bitsToGet = this.need;
while (true)
{
if (bitk >= bitsToGet)
{
num2 = (this.tree_index + (bitb & InternalInflateConstants.InflateMask[bitsToGet])) * 3;
bitb = bitb >> (this.tree[num2 + 1] & 0x1f);
bitk -= this.tree[num2 + 1];
num3 = this.tree[num2];
if (num3 == 0)
{
this.lit = this.tree[num2 + 2];
this.mode = 6;
}
else if ((num3 & 0x10) != 0)
{
this.bitsToGet = num3 & 15;
this.len = this.tree[num2 + 2];
this.mode = 2;
}
else if ((num3 & 0x40) == 0)
{
this.need = num3;
this.tree_index = (num2 / 3) + this.tree[num2 + 2];
}
else
{
if ((num3 & 0x20) == 0)
{
this.mode = 9;
z.Message = "invalid literal/length code";
r = -3;
blocks.bitb = bitb;
blocks.bitk = bitk;
z.AvailableBytesIn = availableBytesIn;
z.TotalBytesIn += nextIn - z.NextIn;
z.NextIn = nextIn;
blocks.writeAt = writeAt;
return(blocks.Flush(r));
}
this.mode = 7;
}
break;
}
if (availableBytesIn == 0)
{
blocks.bitb = bitb;
blocks.bitk = bitk;
z.AvailableBytesIn = availableBytesIn;
z.TotalBytesIn += nextIn - z.NextIn;
z.NextIn = nextIn;
blocks.writeAt = writeAt;
return(blocks.Flush(r));
}
r = 0;
availableBytesIn--;
bitb |= (z.InputBuffer[nextIn++] & 0xff) << (bitk & 0x1f);
bitk += 8;
}
goto TR_0058;
TR_0021:
bitsToGet = this.need;
while (true)
{
if (bitk >= bitsToGet)
{
num2 = (this.tree_index + (bitb & InternalInflateConstants.InflateMask[bitsToGet])) * 3;
bitb = bitb >> (this.tree[num2 + 1] & 0x1f);
bitk -= this.tree[num2 + 1];
num3 = this.tree[num2];
if ((num3 & 0x10) != 0)
{
this.bitsToGet = num3 & 15;
this.dist = this.tree[num2 + 2];
this.mode = 4;
}
else
{
if ((num3 & 0x40) != 0)
{
this.mode = 9;
z.Message = "invalid distance code";
r = -3;
blocks.bitb = bitb;
blocks.bitk = bitk;
z.AvailableBytesIn = availableBytesIn;
z.TotalBytesIn += nextIn - z.NextIn;
z.NextIn = nextIn;
blocks.writeAt = writeAt;
return(blocks.Flush(r));
}
this.need = num3;
this.tree_index = (num2 / 3) + this.tree[num2 + 2];
}
break;
}
if (availableBytesIn == 0)
{
blocks.bitb = bitb;
blocks.bitk = bitk;
z.AvailableBytesIn = availableBytesIn;
z.TotalBytesIn += nextIn - z.NextIn;
z.NextIn = nextIn;
blocks.writeAt = writeAt;
return(blocks.Flush(r));
}
r = 0;
availableBytesIn--;
bitb |= (z.InputBuffer[nextIn++] & 0xff) << (bitk & 0x1f);
bitk += 8;
}
goto TR_0058;
TR_004F:
r = 1;
blocks.bitb = bitb;
blocks.bitk = bitk;
z.AvailableBytesIn = availableBytesIn;
z.TotalBytesIn += nextIn - z.NextIn;
z.NextIn = nextIn;
blocks.writeAt = writeAt;
return(blocks.Flush(r));
TR_0058:
while (true)
{
int mode = this.mode;
switch (mode)
{
case 0:
if ((num9 >= 0x102) && (availableBytesIn >= 10))
{
blocks.bitb = bitb;
blocks.bitk = bitk;
z.AvailableBytesIn = availableBytesIn;
z.TotalBytesIn += nextIn - z.NextIn;
z.NextIn = nextIn;
blocks.writeAt = writeAt;
r = this.InflateFast(this.lbits, this.dbits, this.ltree, this.ltree_index, this.dtree, this.dtree_index, blocks, z);
nextIn = z.NextIn;
availableBytesIn = z.AvailableBytesIn;
bitb = blocks.bitb;
bitk = blocks.bitk;
writeAt = blocks.writeAt;
num9 = (writeAt >= blocks.readAt) ? (blocks.end - writeAt) : ((blocks.readAt - writeAt) - 1);
if (r != 0)
{
this.mode = (r != 1) ? 9 : 7;
continue;
}
}
this.need = this.lbits;
this.tree = this.ltree;
this.tree_index = this.ltree_index;
this.mode = 1;
goto TR_0011;
case 1:
goto TR_0011;
case 2:
bitsToGet = this.bitsToGet;
while (true)
{
if (bitk >= bitsToGet)
{
this.len += bitb & InternalInflateConstants.InflateMask[bitsToGet];
bitb = bitb >> (bitsToGet & 0x1f);
bitk -= bitsToGet;
this.need = this.dbits;
this.tree = this.dtree;
this.tree_index = this.dtree_index;
this.mode = 3;
break;
}
if (availableBytesIn == 0)
{
blocks.bitb = bitb;
blocks.bitk = bitk;
z.AvailableBytesIn = availableBytesIn;
z.TotalBytesIn += nextIn - z.NextIn;
z.NextIn = nextIn;
blocks.writeAt = writeAt;
return(blocks.Flush(r));
}
r = 0;
availableBytesIn--;
bitb |= (z.InputBuffer[nextIn++] & 0xff) << (bitk & 0x1f);
bitk += 8;
}
goto TR_0021;
case 3:
goto TR_0021;
case 4:
bitsToGet = this.bitsToGet;
while (true)
{
if (bitk >= bitsToGet)
{
this.dist += bitb & InternalInflateConstants.InflateMask[bitsToGet];
bitb = bitb >> (bitsToGet & 0x1f);
bitk -= bitsToGet;
this.mode = 5;
break;
}
if (availableBytesIn == 0)
{
blocks.bitb = bitb;
blocks.bitk = bitk;
z.AvailableBytesIn = availableBytesIn;
z.TotalBytesIn += nextIn - z.NextIn;
z.NextIn = nextIn;
blocks.writeAt = writeAt;
return(blocks.Flush(r));
}
r = 0;
availableBytesIn--;
bitb |= (z.InputBuffer[nextIn++] & 0xff) << (bitk & 0x1f);
bitk += 8;
}
break;
case 5:
break;
case 6:
{
if (num9 == 0)
{
if ((writeAt == blocks.end) && (blocks.readAt != 0))
{
writeAt = 0;
num9 = (writeAt >= blocks.readAt) ? (blocks.end - writeAt) : ((blocks.readAt - writeAt) - 1);
}
if (num9 == 0)
{
blocks.writeAt = writeAt;
r = blocks.Flush(r);
writeAt = blocks.writeAt;
num9 = (writeAt >= blocks.readAt) ? (blocks.end - writeAt) : ((blocks.readAt - writeAt) - 1);
if ((writeAt == blocks.end) && (blocks.readAt != 0))
{
writeAt = 0;
num9 = (writeAt >= blocks.readAt) ? (blocks.end - writeAt) : ((blocks.readAt - writeAt) - 1);
}
if (num9 == 0)
{
blocks.bitb = bitb;
blocks.bitk = bitk;
z.AvailableBytesIn = availableBytesIn;
z.TotalBytesIn += nextIn - z.NextIn;
z.NextIn = nextIn;
blocks.writeAt = writeAt;
return(blocks.Flush(r));
}
}
}
r = 0;
blocks.window[writeAt++] = (byte)this.lit;
num9--;
this.mode = 0;
continue;
}
case 7:
if (bitk > 7)
{
bitk -= 8;
availableBytesIn++;
nextIn--;
}
blocks.writeAt = writeAt;
r = blocks.Flush(r);
writeAt = blocks.writeAt;
num9 = (writeAt >= blocks.readAt) ? (blocks.end - writeAt) : ((blocks.readAt - writeAt) - 1);
if (blocks.readAt != blocks.writeAt)
{
blocks.bitb = bitb;
blocks.bitk = bitk;
z.AvailableBytesIn = availableBytesIn;
z.TotalBytesIn += nextIn - z.NextIn;
z.NextIn = nextIn;
blocks.writeAt = writeAt;
return(blocks.Flush(r));
}
this.mode = 8;
goto TR_004F;
case 8:
goto TR_004F;
case 9:
r = -3;
blocks.bitb = bitb;
blocks.bitk = bitk;
z.AvailableBytesIn = availableBytesIn;
z.TotalBytesIn += nextIn - z.NextIn;
z.NextIn = nextIn;
blocks.writeAt = writeAt;
return(blocks.Flush(r));
default:
r = -2;
blocks.bitb = bitb;
blocks.bitk = bitk;
z.AvailableBytesIn = availableBytesIn;
z.TotalBytesIn += nextIn - z.NextIn;
z.NextIn = nextIn;
blocks.writeAt = writeAt;
return(blocks.Flush(r));
}
int num10 = writeAt - this.dist;
while (true)
{
if (num10 >= 0)
{
while (true)
{
if (this.len == 0)
{
this.mode = 0;
break;
}
if (num9 == 0)
{
if ((writeAt == blocks.end) && (blocks.readAt != 0))
{
writeAt = 0;
num9 = (writeAt >= blocks.readAt) ? (blocks.end - writeAt) : ((blocks.readAt - writeAt) - 1);
}
if (num9 == 0)
{
blocks.writeAt = writeAt;
r = blocks.Flush(r);
writeAt = blocks.writeAt;
num9 = (writeAt >= blocks.readAt) ? (blocks.end - writeAt) : ((blocks.readAt - writeAt) - 1);
if ((writeAt == blocks.end) && (blocks.readAt != 0))
{
writeAt = 0;
num9 = (writeAt >= blocks.readAt) ? (blocks.end - writeAt) : ((blocks.readAt - writeAt) - 1);
}
if (num9 == 0)
{
blocks.bitb = bitb;
blocks.bitk = bitk;
z.AvailableBytesIn = availableBytesIn;
z.TotalBytesIn += nextIn - z.NextIn;
z.NextIn = nextIn;
blocks.writeAt = writeAt;
return(blocks.Flush(r));
}
}
}
blocks.window[writeAt++] = blocks.window[num10++];
num9--;
if (num10 == blocks.end)
{
num10 = 0;
}
this.len--;
}
break;
}
num10 += blocks.end;
}
}
goto TR_004F;
}
