internal int deflate(ZStream strm, int flush)
{
if ((flush > 4) || (flush < 0))
{
return(-2);
}
if (((strm.next_out == null) || ((strm.next_in == null) && (strm.avail_in != 0))) || ((this.status == 0x29a) && (flush != 4)))
{
strm.msg = z_errmsg[4];
return(-2);
}
if (strm.avail_out == 0)
{
strm.msg = z_errmsg[7];
return(-5);
}
this.strm = strm;
int num = this.last_flush;
this.last_flush = flush;
if (this.status == 0x2a)
{
int b = (8 + ((this.w_bits - 8) << 4)) << 8;
int num3 = ((this.level - 1) & 0xff) >> 1;
if (num3 > 3)
{
num3 = 3;
}
b |= num3 << 6;
if (this.strstart != 0)
{
b |= 0x20;
}
b += 0x1f - (b % 0x1f);
this.status = 0x71;
this.putShortMSB(b);
if (this.strstart != 0)
{
this.putShortMSB((int)SupportClass.URShift(strm.adler, 0x10));
this.putShortMSB((int)(strm.adler & 0xffffL));
}
strm.adler = strm._adler.adler32(0L, null, 0, 0);
}
if (this.pending != 0)
{
strm.flush_pending();
if (strm.avail_out == 0)
{
this.last_flush = -1;
return(0);
}
}
else if (((strm.avail_in == 0) && (flush <= num)) && (flush != 4))
{
strm.msg = z_errmsg[7];
return(-5);
}
if ((this.status == 0x29a) && (strm.avail_in != 0))
{
strm.msg = z_errmsg[7];
return(-5);
}
if (((strm.avail_in != 0) || (this.lookahead != 0)) || ((flush != 0) && (this.status != 0x29a)))
{
int num4 = -1;
switch (config_table[this.level].func)
{
case 0:
num4 = this.deflate_stored(flush);
break;
case 1:
num4 = this.deflate_fast(flush);
break;
case 2:
num4 = this.deflate_slow(flush);
break;
}
switch (num4)
{
case 2:
case 3:
this.status = 0x29a;
break;
}
if ((num4 == 0) || (num4 == 2))
{
if (strm.avail_out == 0)
{
this.last_flush = -1;
}
return(0);
}
if (num4 == 1)
{
if (flush == 1)
{
this._tr_align();
}
else
{
this._tr_stored_block(0, 0, false);
if (flush == 3)
{
for (int i = 0; i < this.hash_size; i++)
{
this.head[i] = 0;
}
}
}
strm.flush_pending();
if (strm.avail_out == 0)
{
this.last_flush = -1;
return(0);
}
}
}
if (flush == 4)
{
if (this.noheader != 0)
{
return(1);
}
this.putShortMSB((int)SupportClass.URShift(strm.adler, 0x10));
this.putShortMSB((int)(strm.adler & 0xffffL));
strm.flush_pending();
this.noheader = -1;
if (this.pending == 0)
{
return(1);
}
}
return(0);
}
internal void put_short(int w)
{
this.put_byte((byte)w);
this.put_byte((byte)SupportClass.URShift(w, 8));
}
internal static int huft_build(int[] b, int bindex, int n, int s, int[] d, int[] e, int[] t, int[] m, int[] hp, int[] hn, int[] v)
{
int[] numArray = new int[0x10];
int[] sourceArray = new int[3];
int[] numArray3 = new int[15];
int[] numArray4 = new int[0x10];
int index = 0;
int num5 = n;
do
{
numArray[b[bindex + index]]++;
index++;
num5--;
}while(num5 != 0);
if (numArray[0] == n)
{
t[0] = -1;
m[0] = 0;
return(0);
}
int num8 = m[0];
int num6 = 1;
while (num6 <= 15)
{
if (numArray[num6] != 0)
{
break;
}
num6++;
}
int num7 = num6;
if (num8 < num6)
{
num8 = num6;
}
num5 = 15;
while (num5 != 0)
{
if (numArray[num5] != 0)
{
break;
}
num5--;
}
int num3 = num5;
if (num8 > num5)
{
num8 = num5;
}
m[0] = num8;
int num14 = ((int)1) << num6;
while (num6 < num5)
{
num14 -= numArray[num6];
if (num14 < 0)
{
return(-3);
}
num6++;
num14 = num14 << 1;
}
num14 -= numArray[num5];
if (num14 < 0)
{
return(-3);
}
numArray[num5] += num14;
numArray4[1] = num6 = 0;
index = 1;
int num13 = 2;
while (--num5 != 0)
{
numArray4[num13] = num6 += numArray[index];
num13++;
index++;
}
num5 = 0;
index = 0;
do
{
num6 = b[bindex + index];
if (num6 != 0)
{
v[numArray4[num6]++] = num5;
}
index++;
}while(++num5 < n);
n = numArray4[num3];
numArray4[0] = num5 = 0;
index = 0;
int num4 = -1;
int bits = -num8;
numArray3[0] = 0;
int num11 = 0;
int num15 = 0;
while (num7 <= num3)
{
int num2;
int num = numArray[num7];
goto Label_03BD;
Label_01B2:
num4++;
bits += num8;
num15 = num3 - bits;
num15 = (num15 > num8) ? num8 : num15;
if ((num2 = ((int)1) << (num6 = num7 - bits)) > (num + 1))
{
num2 -= num + 1;
num13 = num7;
if (num6 < num15)
{
while (++num6 < num15)
{
if ((num2 = num2 << 1) <= numArray[++num13])
{
break;
}
num2 -= numArray[num13];
}
}
}
num15 = ((int)1) << num6;
if ((hn[0] + num15) > 0x5a0)
{
return(-3);
}
numArray3[num4] = num11 = hn[0];
hn[0] += num15;
if (num4 != 0)
{
numArray4[num4] = num5;
sourceArray[0] = (byte)num6;
sourceArray[1] = (byte)num8;
num6 = SupportClass.URShift(num5, (int)(bits - num8));
sourceArray[2] = (num11 - numArray3[num4 - 1]) - num6;
Array.Copy(sourceArray, 0, hp, (numArray3[num4 - 1] + num6) * 3, 3);
}
else
{
t[0] = num11;
}
Label_02AE:
if (num7 > (bits + num8))
{
goto Label_01B2;
}
sourceArray[1] = (byte)(num7 - bits);
if (index >= n)
{
sourceArray[0] = 0xc0;
}
else if (v[index] < s)
{
sourceArray[0] = (v[index] < 0x100) ? ((byte)0) : ((byte)0x60);
sourceArray[2] = v[index++];
}
else
{
sourceArray[0] = (byte)((e[v[index] - s] + 0x10) + 0x40);
sourceArray[2] = d[v[index++] - s];
}
num2 = ((int)1) << (num7 - bits);
num6 = SupportClass.URShift(num5, bits);
while (num6 < num15)
{
Array.Copy(sourceArray, 0, hp, (num11 + num6) * 3, 3);
num6 += num2;
}
num6 = ((int)1) << (num7 - 1);
while ((num5 & num6) != 0)
{
num5 ^= num6;
num6 = SupportClass.URShift(num6, 1);
}
num5 ^= num6;
for (int i = (((int)1) << bits) - 1; (num5 & i) != numArray4[num4]; i = (((int)1) << bits) - 1)
{
num4--;
bits -= num8;
}
Label_03BD:
if (num-- != 0)
{
goto Label_02AE;
}
num7++;
}
if ((num14 != 0) && (num3 != 1))
{
return(-5);
}
return(0);
}
public int read(byte[] b, int off, int len)
{
int num;
if (len == 0)
{
return(0);
}
this.z.next_out = b;
this.z.next_out_index = off;
this.z.avail_out = len;
do
{
if ((this.z.avail_in == 0) && !this.nomoreinput)
{
this.z.next_in_index = 0;
int bufsize = this.bufsize;
if (this.maxInput > 0L)
{
if (this.TotalIn < this.maxInput)
{
bufsize = (int)Math.Min(this.maxInput - this.TotalIn, (long)this.bufsize);
}
else
{
this.z.avail_in = -1;
}
}
if (this.z.avail_in != -1)
{
this.z.avail_in = SupportClass.ReadInput(this.in_Renamed, this.buf, 0, bufsize);
}
if (this.z.avail_in == -1)
{
this.z.avail_in = 0;
this.nomoreinput = true;
}
}
if (this.compress)
{
num = this.z.deflate(this.flush);
}
else
{
num = this.z.inflate(this.flush);
}
if (this.nomoreinput && (num == -5))
{
return(-1);
}
if ((num != 0) && (num != 1))
{
throw new ZStreamException((this.compress ? "de" : "in") + "flating: " + this.z.msg);
}
if (this.nomoreinput && (this.z.avail_out == len))
{
return(-1);
}
}while((this.z.avail_out > 0) && (num == 0));
return(len - this.z.avail_out);
}
internal int proc(ZStream z, int r)
{
int table;
int sourceIndex = z.next_in_index;
int num5 = z.avail_in;
int bitb = this.bitb;
int bitk = this.bitk;
int write = this.write;
int num7 = (write < this.read) ? ((this.read - write) - 1) : (this.end - write);
Label_0047:
switch (this.mode)
{
case 0:
while (bitk < 3)
{
if (num5 != 0)
{
r = 0;
}
else
{
this.bitb = bitb;
this.bitk = bitk;
z.avail_in = num5;
z.total_in += sourceIndex - z.next_in_index;
z.next_in_index = sourceIndex;
this.write = write;
return(this.inflate_flush(z, r));
}
num5--;
bitb |= (z.next_in[sourceIndex++] & 0xff) << bitk;
bitk += 8;
}
table = bitb & 7;
this.last = table & 1;
switch (SupportClass.URShift(table, 1))
{
case 0:
bitb = SupportClass.URShift(bitb, 3);
bitk -= 3;
table = bitk & 7;
bitb = SupportClass.URShift(bitb, table);
bitk -= table;
this.mode = 1;
goto Label_0047;
case 1: {
int[] numArray = new int[1];
int[] numArray2 = new int[1];
int[][] numArray3 = new int[1][];
int[][] numArray4 = new int[1][];
InfTree.inflate_trees_fixed(numArray, numArray2, numArray3, numArray4, z);
this.codes = new InfCodes(numArray[0], numArray2[0], numArray3[0], numArray4[0], z);
bitb = SupportClass.URShift(bitb, 3);
bitk -= 3;
this.mode = 6;
goto Label_0047;
}
case 2:
bitb = SupportClass.URShift(bitb, 3);
bitk -= 3;
this.mode = 3;
goto Label_0047;
case 3:
bitb = SupportClass.URShift(bitb, 3);
bitk -= 3;
this.mode = 9;
z.msg = "invalid block type";
r = -3;
this.bitb = bitb;
this.bitk = bitk;
z.avail_in = num5;
z.total_in += sourceIndex - z.next_in_index;
z.next_in_index = sourceIndex;
this.write = write;
return(this.inflate_flush(z, r));
}
goto Label_0047;
case 1:
while (bitk < 0x20)
{
if (num5 != 0)
{
r = 0;
}
else
{
this.bitb = bitb;
this.bitk = bitk;
z.avail_in = num5;
z.total_in += sourceIndex - z.next_in_index;
z.next_in_index = sourceIndex;
this.write = write;
return(this.inflate_flush(z, r));
}
num5--;
bitb |= (z.next_in[sourceIndex++] & 0xff) << bitk;
bitk += 8;
}
if ((SupportClass.URShift(~bitb, 0x10) & 0xffff) != (bitb & 0xffff))
{
this.mode = 9;
z.msg = "invalid stored block lengths";
r = -3;
this.bitb = bitb;
this.bitk = bitk;
z.avail_in = num5;
z.total_in += sourceIndex - z.next_in_index;
z.next_in_index = sourceIndex;
this.write = write;
return(this.inflate_flush(z, r));
}
this.left = bitb & 0xffff;
bitb = bitk = 0;
this.mode = (this.left != 0) ? 2 : ((this.last != 0) ? 7 : 0);
goto Label_0047;
case 2:
if (num5 != 0)
{
if (num7 == 0)
{
if ((write == this.end) && (this.read != 0))
{
write = 0;
num7 = (write < this.read) ? ((this.read - write) - 1) : (this.end - write);
}
if (num7 == 0)
{
this.write = write;
r = this.inflate_flush(z, r);
write = this.write;
num7 = (write < this.read) ? ((this.read - write) - 1) : (this.end - write);
if ((write == this.end) && (this.read != 0))
{
write = 0;
num7 = (write < this.read) ? ((this.read - write) - 1) : (this.end - write);
}
if (num7 == 0)
{
this.bitb = bitb;
this.bitk = bitk;
z.avail_in = num5;
z.total_in += sourceIndex - z.next_in_index;
z.next_in_index = sourceIndex;
this.write = write;
return(this.inflate_flush(z, r));
}
}
}
r = 0;
table = this.left;
if (table > num5)
{
table = num5;
}
if (table > num7)
{
table = num7;
}
Array.Copy(z.next_in, sourceIndex, this.window, write, table);
sourceIndex += table;
num5 -= table;
write += table;
num7 -= table;
this.left -= table;
if (this.left == 0)
{
this.mode = (this.last != 0) ? 7 : 0;
}
goto Label_0047;
}
this.bitb = bitb;
this.bitk = bitk;
z.avail_in = num5;
z.total_in += sourceIndex - z.next_in_index;
z.next_in_index = sourceIndex;
this.write = write;
return(this.inflate_flush(z, r));
case 3:
while (bitk < 14)
{
if (num5 != 0)
{
r = 0;
}
else
{
this.bitb = bitb;
this.bitk = bitk;
z.avail_in = num5;
z.total_in += sourceIndex - z.next_in_index;
z.next_in_index = sourceIndex;
this.write = write;
return(this.inflate_flush(z, r));
}
num5--;
bitb |= (z.next_in[sourceIndex++] & 0xff) << bitk;
bitk += 8;
}
this.table = table = bitb & 0x3fff;
if (((table & 0x1f) > 0x1d) || (((table >> 5) & 0x1f) > 0x1d))
{
this.mode = 9;
z.msg = "too many length or distance symbols";
r = -3;
this.bitb = bitb;
this.bitk = bitk;
z.avail_in = num5;
z.total_in += sourceIndex - z.next_in_index;
z.next_in_index = sourceIndex;
this.write = write;
return(this.inflate_flush(z, r));
}
table = (0x102 + (table & 0x1f)) + ((table >> 5) & 0x1f);
this.blens = new int[table];
bitb = SupportClass.URShift(bitb, 14);
bitk -= 14;
this.index = 0;
this.mode = 4;
break;
case 4:
break;
case 5:
goto Label_07B9;
case 6:
goto Label_0B63;
case 7:
goto Label_0C2C;
case 8:
goto Label_0CC1;
case 9:
r = -3;
this.bitb = bitb;
this.bitk = bitk;
z.avail_in = num5;
z.total_in += sourceIndex - z.next_in_index;
z.next_in_index = sourceIndex;
this.write = write;
return(this.inflate_flush(z, r));
default:
r = -2;
this.bitb = bitb;
this.bitk = bitk;
z.avail_in = num5;
z.total_in += sourceIndex - z.next_in_index;
z.next_in_index = sourceIndex;
this.write = write;
return(this.inflate_flush(z, r));
}
while (this.index < (4 + SupportClass.URShift(this.table, 10)))
{
while (bitk < 3)
{
if (num5 != 0)
{
r = 0;
}
else
{
this.bitb = bitb;
this.bitk = bitk;
z.avail_in = num5;
z.total_in += sourceIndex - z.next_in_index;
z.next_in_index = sourceIndex;
this.write = write;
return(this.inflate_flush(z, r));
}
num5--;
bitb |= (z.next_in[sourceIndex++] & 0xff) << bitk;
bitk += 8;
}
this.blens[border[this.index++]] = bitb & 7;
bitb = SupportClass.URShift(bitb, 3);
bitk -= 3;
}
while (this.index < 0x13)
{
this.blens[border[this.index++]] = 0;
}
this.bb[0] = 7;
table = InfTree.inflate_trees_bits(this.blens, this.bb, this.tb, this.hufts, z);
if (table != 0)
{
r = table;
if (r == -3)
{
this.blens = null;
this.mode = 9;
}
this.bitb = bitb;
this.bitk = bitk;
z.avail_in = num5;
z.total_in += sourceIndex - z.next_in_index;
z.next_in_index = sourceIndex;
this.write = write;
return(this.inflate_flush(z, r));
}
this.index = 0;
this.mode = 5;
Label_07B9:
table = this.table;
if (this.index < ((0x102 + (table & 0x1f)) + ((table >> 5) & 0x1f)))
{
table = this.bb[0];
while (bitk < table)
{
if (num5 != 0)
{
r = 0;
}
else
{
this.bitb = bitb;
this.bitk = bitk;
z.avail_in = num5;
z.total_in += sourceIndex - z.next_in_index;
z.next_in_index = sourceIndex;
this.write = write;
return(this.inflate_flush(z, r));
}
num5--;
bitb |= (z.next_in[sourceIndex++] & 0xff) << bitk;
bitk += 8;
}
int num1 = this.tb[0];
table = this.hufts[((this.tb[0] + (bitb & inflate_mask[table])) * 3) + 1];
int num10 = this.hufts[((this.tb[0] + (bitb & inflate_mask[table])) * 3) + 2];
if (num10 < 0x10)
{
bitb = SupportClass.URShift(bitb, table);
bitk -= table;
this.blens[this.index++] = num10;
}
else
{
int index = (num10 == 0x12) ? 7 : (num10 - 14);
int num9 = (num10 == 0x12) ? 11 : 3;
while (bitk < (table + index))
{
if (num5 != 0)
{
r = 0;
}
else
{
this.bitb = bitb;
this.bitk = bitk;
z.avail_in = num5;
z.total_in += sourceIndex - z.next_in_index;
z.next_in_index = sourceIndex;
this.write = write;
return(this.inflate_flush(z, r));
}
num5--;
bitb |= (z.next_in[sourceIndex++] & 0xff) << bitk;
bitk += 8;
}
bitb = SupportClass.URShift(bitb, table);
bitk -= table;
num9 += bitb & inflate_mask[index];
bitb = SupportClass.URShift(bitb, index);
bitk -= index;
index = this.index;
table = this.table;
if (((index + num9) > ((0x102 + (table & 0x1f)) + ((table >> 5) & 0x1f))) || ((num10 == 0x10) && (index < 1)))
{
this.blens = null;
this.mode = 9;
z.msg = "invalid bit length repeat";
r = -3;
this.bitb = bitb;
this.bitk = bitk;
z.avail_in = num5;
z.total_in += sourceIndex - z.next_in_index;
z.next_in_index = sourceIndex;
this.write = write;
return(this.inflate_flush(z, r));
}
num10 = (num10 == 0x10) ? this.blens[index - 1] : 0;
do
{
this.blens[index++] = num10;
}while(--num9 != 0);
this.index = index;
}
goto Label_07B9;
}
this.tb[0] = -1;
int[] bl = new int[1];
int[] bd = new int[1];
int[] tl = new int[1];
int[] td = new int[1];
bl[0] = 9;
bd[0] = 6;
table = this.table;
table = InfTree.inflate_trees_dynamic(0x101 + (table & 0x1f), 1 + ((table >> 5) & 0x1f), this.blens, bl, bd, tl, td, this.hufts, z);
switch (table)
{
case 0:
this.codes = new InfCodes(bl[0], bd[0], this.hufts, tl[0], this.hufts, td[0], z);
this.blens = null;
this.mode = 6;
goto Label_0B63;
case -3:
this.blens = null;
this.mode = 9;
break;
}
r = table;
this.bitb = bitb;
this.bitk = bitk;
z.avail_in = num5;
z.total_in += sourceIndex - z.next_in_index;
z.next_in_index = sourceIndex;
this.write = write;
return(this.inflate_flush(z, r));
Label_0B63:
this.bitb = bitb;
this.bitk = bitk;
z.avail_in = num5;
z.total_in += sourceIndex - z.next_in_index;
z.next_in_index = sourceIndex;
this.write = write;
if ((r = this.codes.proc(this, z, r)) != 1)
{
return(this.inflate_flush(z, r));
}
r = 0;
this.codes.free(z);
sourceIndex = z.next_in_index;
num5 = z.avail_in;
bitb = this.bitb;
bitk = this.bitk;
write = this.write;
num7 = (write < this.read) ? ((this.read - write) - 1) : (this.end - write);
if (this.last == 0)
{
this.mode = 0;
goto Label_0047;
}
this.mode = 7;
Label_0C2C:
this.write = write;
r = this.inflate_flush(z, r);
write = this.write;
num7 = (write < this.read) ? ((this.read - write) - 1) : (this.end - write);
if (this.read != this.write)
{
this.bitb = bitb;
this.bitk = bitk;
z.avail_in = num5;
z.total_in += sourceIndex - z.next_in_index;
z.next_in_index = sourceIndex;
this.write = write;
return(this.inflate_flush(z, r));
}
this.mode = 8;
Label_0CC1:
r = 1;
this.bitb = bitb;
this.bitk = bitk;
z.avail_in = num5;
z.total_in += sourceIndex - z.next_in_index;
z.next_in_index = sourceIndex;
this.write = write;
return(this.inflate_flush(z, r));
}
