// Token: 0x06000733 RID: 1843 RVA: 0x0002EEB4 File Offset: 0x0002D0B4
internal Class_193(Class_212 codec, object checkfn, int w)
{
this._codec = codec;
this.hufts = new int[4320];
this.window = new byte[w];
this.end = w;
this.checkfn = checkfn;
this.mode = Class_193.InflateBlockMode.TYPE;
this.Reset();
}
// Token: 0x06000746 RID: 1862 RVA: 0x00031438 File Offset: 0x0002F638
internal int Initialize(Class_212 codec, int w)
{
this._codec = codec;
this._codec.Message = null;
this.blocks = null;
if (w < 8 || w > 15)
{
this.End();
throw new Class_205("Bad window size.");
}
this.wbits = w;
this.blocks = new Class_193(codec, this.HandleRfc1950HeaderBytes ? this : null, 1 << w);
this.Reset();
return(0);
}
// Token: 0x0600074D RID: 1869 RVA: 0x00032228 File Offset: 0x00030428
internal int inflate_trees_bits(int[] c, int[] bb, int[] tb, int[] hp, Class_212 z)
{
this.initWorkArea(19);
this.hn[0] = 0;
int num = this.huft_build(c, 0, 19, 19, null, null, tb, bb, hp, this.hn, this.v);
if (num == -3)
{
z.Message = "oversubscribed dynamic bit lengths tree";
}
else if (num == -5 || bb[0] == 0)
{
z.Message = "incomplete dynamic bit lengths tree";
num = -3;
}
return(num);
}
// Token: 0x0600076C RID: 1900 RVA: 0x00032EFC File Offset: 0x000310FC
private bool tmethod_1302(Class_198 arg_0)
{
Class_212 class_ = arg_0.field_7;
class_.ResetDeflate();
class_.NextIn = 0;
class_.AvailableBytesIn = arg_0.field_5;
class_.NextOut = 0;
class_.AvailableBytesOut = arg_0.field_1.Length;
do
{
class_.Deflate(Class_201.None);
}while (class_.AvailableBytesIn > 0 || class_.AvailableBytesOut == 0);
class_.Deflate(Class_201.Sync);
arg_0.field_6 = (int)class_.TotalBytesOut;
return(true);
}
// Token: 0x06000763 RID: 1891 RVA: 0x00032928 File Offset: 0x00030B28
private void gmethod_1293()
{
byte[] array = new byte[128];
Class_212 class_ = new Class_212();
int num = class_.InitializeDeflate(this.field_22, false);
class_.InputBuffer = null;
class_.NextIn = 0;
class_.AvailableBytesIn = 0;
class_.OutputBuffer = array;
class_.NextOut = 0;
class_.AvailableBytesOut = array.Length;
num = class_.Deflate(Class_201.Finish);
if (num != 1 && num != 0)
{
throw new Exception("deflating: " + class_.Message);
}
if (array.Length - class_.AvailableBytesOut > 0)
{
this.field_5.Write(array, 0, array.Length - class_.AvailableBytesOut);
}
class_.EndDeflate();
this.field_16 = this.field_17.prop_1;
}
// Token: 0x0600074A RID: 1866 RVA: 0x00031DA1 File Offset: 0x0002FFA1
internal int SyncPoint(Class_212 z)
{
return(this.blocks.SyncPoint());
}
// Token: 0x0600073F RID: 1855 RVA: 0x00030D0C File Offset: 0x0002EF0C
internal int InflateFast(int bl, int bd, int[] tl, int tl_index, int[] td, int td_index, Class_193 s, Class_212 z)
{
int num = z.NextIn;
int num2 = z.AvailableBytesIn;
int num3 = s.bitb;
int i = s.bitk;
int num4 = s.writeAt;
int num5 = (num4 < s.readAt) ? (s.readAt - num4 - 1) : (s.end - num4);
int num6 = Class_194.InflateMask[bl];
int num7 = Class_194.InflateMask[bd];
int num10;
int num11;
for (;;)
{
if (i >= 20)
{
int num8 = num3 & num6;
int num9 = (tl_index + num8) * 3;
if ((num10 = tl[num9]) == 0)
{
num3 >>= tl[num9 + 1];
i -= tl[num9 + 1];
s.window[num4++] = (byte)tl[num9 + 2];
num5--;
}
else
{
for (;;)
{
num3 >>= tl[num9 + 1];
i -= tl[num9 + 1];
if ((num10 & 16) != 0)
{
break;
}
if ((num10 & 64) != 0)
{
goto IL_4E2;
}
num8 += tl[num9 + 2];
num8 += (num3 & Class_194.InflateMask[num10]);
num9 = (tl_index + num8) * 3;
if ((num10 = tl[num9]) == 0)
{
goto Block_20;
}
}
num10 &= 15;
num11 = tl[num9 + 2] + (num3 & Class_194.InflateMask[num10]);
num3 >>= num10;
for (i -= num10; i < 15; i += 8)
{
num2--;
num3 |= (int)(z.InputBuffer[num++] & byte.MaxValue) << i;
}
num8 = (num3 & num7);
num9 = (td_index + num8) * 3;
num10 = td[num9];
for (;;)
{
num3 >>= td[num9 + 1];
i -= td[num9 + 1];
if ((num10 & 16) != 0)
{
break;
}
if ((num10 & 64) != 0)
{
goto IL_3EC;
}
num8 += td[num9 + 2];
num8 += (num3 & Class_194.InflateMask[num10]);
num9 = (td_index + num8) * 3;
num10 = td[num9];
}
num10 &= 15;
while (i < num10)
{
num2--;
num3 |= (int)(z.InputBuffer[num++] & byte.MaxValue) << i;
i += 8;
}
int num12 = td[num9 + 2] + (num3 & Class_194.InflateMask[num10]);
num3 >>= num10;
i -= num10;
num5 -= num11;
int num13;
if (num4 >= num12)
{
num13 = num4 - num12;
if (num4 - num13 > 0 && 2 > num4 - num13)
{
s.window[num4++] = s.window[num13++];
s.window[num4++] = s.window[num13++];
num11 -= 2;
}
else
{
Array.Copy(s.window, num13, s.window, num4, 2);
num4 += 2;
num13 += 2;
num11 -= 2;
}
}
else
{
num13 = num4 - num12;
do
{
num13 += s.end;
}while (num13 < 0);
num10 = s.end - num13;
if (num11 > num10)
{
num11 -= num10;
if (num4 - num13 > 0 && num10 > num4 - num13)
{
do
{
s.window[num4++] = s.window[num13++];
}while (--num10 != 0);
}
else
{
Array.Copy(s.window, num13, s.window, num4, num10);
num4 += num10;
num13 += num10;
}
num13 = 0;
}
}
if (num4 - num13 > 0 && num11 > num4 - num13)
{
do
{
s.window[num4++] = s.window[num13++];
}while (--num11 != 0);
goto IL_5E3;
}
Array.Copy(s.window, num13, s.window, num4, num11);
num4 += num11;
num13 += num11;
goto IL_5E3;
Block_20:
num3 >>= tl[num9 + 1];
i -= tl[num9 + 1];
s.window[num4++] = (byte)tl[num9 + 2];
num5--;
}
IL_5E3:
if (num5 < 258 || num2 < 10)
{
goto IL_5F7;
}
}
else
{
num2--;
num3 |= (int)(z.InputBuffer[num++] & byte.MaxValue) << i;
i += 8;
}
}
IL_3EC:
z.Message = "invalid distance code";
num11 = z.AvailableBytesIn - num2;
num11 = ((i >> 3 < num11) ? (i >> 3) : num11);
num2 += num11;
num -= num11;
i -= num11 << 3;
s.bitb = num3;
s.bitk = i;
z.AvailableBytesIn = num2;
z.TotalBytesIn += (long)(num - z.NextIn);
z.NextIn = num;
s.writeAt = num4;
return(-3);
IL_4E2:
if ((num10 & 32) != 0)
{
num11 = z.AvailableBytesIn - num2;
num11 = ((i >> 3 < num11) ? (i >> 3) : num11);
num2 += num11;
num -= num11;
i -= num11 << 3;
s.bitb = num3;
s.bitk = i;
z.AvailableBytesIn = num2;
z.TotalBytesIn += (long)(num - z.NextIn);
z.NextIn = num;
s.writeAt = num4;
return(1);
}
z.Message = "invalid literal/length code";
num11 = z.AvailableBytesIn - num2;
num11 = ((i >> 3 < num11) ? (i >> 3) : num11);
num2 += num11;
num -= num11;
i -= num11 << 3;
s.bitb = num3;
s.bitk = i;
z.AvailableBytesIn = num2;
z.TotalBytesIn += (long)(num - z.NextIn);
z.NextIn = num;
s.writeAt = num4;
return(-3);
IL_5F7:
num11 = z.AvailableBytesIn - num2;
num11 = ((i >> 3 < num11) ? (i >> 3) : num11);
num2 += num11;
num -= num11;
i -= num11 << 3;
s.bitb = num3;
s.bitk = i;
z.AvailableBytesIn = num2;
z.TotalBytesIn += (long)(num - z.NextIn);
z.NextIn = num;
s.writeAt = num4;
return(0);
}
// Token: 0x0600073E RID: 1854 RVA: 0x00030224 File Offset: 0x0002E424
internal int Process(Class_193 blocks, int r)
{
Class_212 codec = blocks._codec;
int num = codec.NextIn;
int num2 = codec.AvailableBytesIn;
int num3 = blocks.bitb;
int i = blocks.bitk;
int num4 = blocks.writeAt;
int num5 = (num4 < blocks.readAt) ? (blocks.readAt - num4 - 1) : (blocks.end - num4);
for (;;)
{
int num6;
switch (this.mode)
{
case 0:
if (num5 >= 258 && num2 >= 10)
{
blocks.bitb = num3;
blocks.bitk = i;
codec.AvailableBytesIn = num2;
codec.TotalBytesIn += (long)(num - codec.NextIn);
codec.NextIn = num;
blocks.writeAt = num4;
r = this.InflateFast((int)this.lbits, (int)this.dbits, this.ltree, this.ltree_index, this.dtree, this.dtree_index, blocks, codec);
num = codec.NextIn;
num2 = codec.AvailableBytesIn;
num3 = blocks.bitb;
i = blocks.bitk;
num4 = blocks.writeAt;
num5 = ((num4 < blocks.readAt) ? (blocks.readAt - num4 - 1) : (blocks.end - num4));
if (r != 0)
{
this.mode = ((r == 1) ? 7 : 9);
continue;
}
}
this.need = (int)this.lbits;
this.tree = this.ltree;
this.tree_index = this.ltree_index;
this.mode = 1;
goto IL_1AC;
case 1:
goto IL_1AC;
case 2:
num6 = this.bitsToGet;
while (i < num6)
{
if (num2 == 0)
{
goto IL_382;
}
r = 0;
num2--;
num3 |= (int)(codec.InputBuffer[num++] & byte.MaxValue) << i;
i += 8;
}
this.len += (num3 & Class_194.InflateMask[num6]);
num3 >>= num6;
i -= num6;
this.need = (int)this.dbits;
this.tree = this.dtree;
this.tree_index = this.dtree_index;
this.mode = 3;
goto IL_43D;
case 3:
goto IL_43D;
case 4:
num6 = this.bitsToGet;
while (i < num6)
{
if (num2 == 0)
{
goto IL_5D9;
}
r = 0;
num2--;
num3 |= (int)(codec.InputBuffer[num++] & byte.MaxValue) << i;
i += 8;
}
this.dist += (num3 & Class_194.InflateMask[num6]);
num3 >>= num6;
i -= num6;
this.mode = 5;
goto IL_670;
case 5:
goto IL_670;
case 6:
if (num5 == 0)
{
if (num4 == blocks.end && blocks.readAt != 0)
{
num4 = 0;
num5 = ((num4 < blocks.readAt) ? (blocks.readAt - num4 - 1) : (blocks.end - num4));
}
if (num5 == 0)
{
blocks.writeAt = num4;
r = blocks.Flush(r);
num4 = blocks.writeAt;
num5 = ((num4 < blocks.readAt) ? (blocks.readAt - num4 - 1) : (blocks.end - num4));
if (num4 == blocks.end && blocks.readAt != 0)
{
num4 = 0;
num5 = ((num4 < blocks.readAt) ? (blocks.readAt - num4 - 1) : (blocks.end - num4));
}
if (num5 == 0)
{
goto Block_44;
}
}
}
r = 0;
blocks.window[num4++] = (byte)this.lit;
num5--;
this.mode = 0;
continue;
case 7:
goto IL_954;
case 8:
goto IL_A05;
case 9:
goto IL_A4B;
}
break;
IL_1AC:
num6 = this.need;
while (i < num6)
{
if (num2 == 0)
{
goto IL_1C8;
}
r = 0;
num2--;
num3 |= (int)(codec.InputBuffer[num++] & byte.MaxValue) << i;
i += 8;
}
int num7 = (this.tree_index + (num3 & Class_194.InflateMask[num6])) * 3;
num3 >>= this.tree[num7 + 1];
i -= this.tree[num7 + 1];
int num8 = this.tree[num7];
if (num8 == 0)
{
this.lit = this.tree[num7 + 2];
this.mode = 6;
continue;
}
if ((num8 & 16) != 0)
{
this.bitsToGet = (num8 & 15);
this.len = this.tree[num7 + 2];
this.mode = 2;
continue;
}
if ((num8 & 64) == 0)
{
this.need = num8;
this.tree_index = num7 / 3 + this.tree[num7 + 2];
continue;
}
if ((num8 & 32) != 0)
{
this.mode = 7;
continue;
}
goto IL_30C;
IL_43D:
num6 = this.need;
while (i < num6)
{
if (num2 == 0)
{
goto IL_459;
}
r = 0;
num2--;
num3 |= (int)(codec.InputBuffer[num++] & byte.MaxValue) << i;
i += 8;
}
num7 = (this.tree_index + (num3 & Class_194.InflateMask[num6])) * 3;
num3 >>= this.tree[num7 + 1];
i -= this.tree[num7 + 1];
num8 = this.tree[num7];
if ((num8 & 16) != 0)
{
this.bitsToGet = (num8 & 15);
this.dist = this.tree[num7 + 2];
this.mode = 4;
continue;
}
if ((num8 & 64) == 0)
{
this.need = num8;
this.tree_index = num7 / 3 + this.tree[num7 + 2];
continue;
}
goto IL_563;
IL_670:
int j;
for (j = num4 - this.dist; j < 0; j += blocks.end)
{
}
while (this.len != 0)
{
if (num5 == 0)
{
if (num4 == blocks.end && blocks.readAt != 0)
{
num4 = 0;
num5 = ((num4 < blocks.readAt) ? (blocks.readAt - num4 - 1) : (blocks.end - num4));
}
if (num5 == 0)
{
blocks.writeAt = num4;
r = blocks.Flush(r);
num4 = blocks.writeAt;
num5 = ((num4 < blocks.readAt) ? (blocks.readAt - num4 - 1) : (blocks.end - num4));
if (num4 == blocks.end && blocks.readAt != 0)
{
num4 = 0;
num5 = ((num4 < blocks.readAt) ? (blocks.readAt - num4 - 1) : (blocks.end - num4));
}
if (num5 == 0)
{
goto Block_32;
}
}
}
blocks.window[num4++] = blocks.window[j++];
num5--;
if (j == blocks.end)
{
j = 0;
}
this.len--;
}
this.mode = 0;
}
r = -2;
blocks.bitb = num3;
blocks.bitk = i;
codec.AvailableBytesIn = num2;
codec.TotalBytesIn += (long)(num - codec.NextIn);
codec.NextIn = num;
blocks.writeAt = num4;
return(blocks.Flush(r));
IL_1C8:
blocks.bitb = num3;
blocks.bitk = i;
codec.AvailableBytesIn = num2;
codec.TotalBytesIn += (long)(num - codec.NextIn);
codec.NextIn = num;
blocks.writeAt = num4;
return(blocks.Flush(r));
IL_30C:
this.mode = 9;
codec.Message = "invalid literal/length code";
r = -3;
blocks.bitb = num3;
blocks.bitk = i;
codec.AvailableBytesIn = num2;
codec.TotalBytesIn += (long)(num - codec.NextIn);
codec.NextIn = num;
blocks.writeAt = num4;
return(blocks.Flush(r));
IL_382:
blocks.bitb = num3;
blocks.bitk = i;
codec.AvailableBytesIn = num2;
codec.TotalBytesIn += (long)(num - codec.NextIn);
codec.NextIn = num;
blocks.writeAt = num4;
return(blocks.Flush(r));
IL_459:
blocks.bitb = num3;
blocks.bitk = i;
codec.AvailableBytesIn = num2;
codec.TotalBytesIn += (long)(num - codec.NextIn);
codec.NextIn = num;
blocks.writeAt = num4;
return(blocks.Flush(r));
IL_563:
this.mode = 9;
codec.Message = "invalid distance code";
r = -3;
blocks.bitb = num3;
blocks.bitk = i;
codec.AvailableBytesIn = num2;
codec.TotalBytesIn += (long)(num - codec.NextIn);
codec.NextIn = num;
blocks.writeAt = num4;
return(blocks.Flush(r));
IL_5D9:
blocks.bitb = num3;
blocks.bitk = i;
codec.AvailableBytesIn = num2;
codec.TotalBytesIn += (long)(num - codec.NextIn);
codec.NextIn = num;
blocks.writeAt = num4;
return(blocks.Flush(r));
Block_32:
blocks.bitb = num3;
blocks.bitk = i;
codec.AvailableBytesIn = num2;
codec.TotalBytesIn += (long)(num - codec.NextIn);
codec.NextIn = num;
blocks.writeAt = num4;
return(blocks.Flush(r));
Block_44:
blocks.bitb = num3;
blocks.bitk = i;
codec.AvailableBytesIn = num2;
codec.TotalBytesIn += (long)(num - codec.NextIn);
codec.NextIn = num;
blocks.writeAt = num4;
return(blocks.Flush(r));
IL_954:
if (i > 7)
{
i -= 8;
num2++;
num--;
}
blocks.writeAt = num4;
r = blocks.Flush(r);
num4 = blocks.writeAt;
int num9 = (num4 < blocks.readAt) ? (blocks.readAt - num4 - 1) : (blocks.end - num4);
if (blocks.readAt != blocks.writeAt)
{
blocks.bitb = num3;
blocks.bitk = i;
codec.AvailableBytesIn = num2;
codec.TotalBytesIn += (long)(num - codec.NextIn);
codec.NextIn = num;
blocks.writeAt = num4;
return(blocks.Flush(r));
}
this.mode = 8;
IL_A05:
r = 1;
blocks.bitb = num3;
blocks.bitk = i;
codec.AvailableBytesIn = num2;
codec.TotalBytesIn += (long)(num - codec.NextIn);
codec.NextIn = num;
blocks.writeAt = num4;
return(blocks.Flush(r));
IL_A4B:
r = -3;
blocks.bitb = num3;
blocks.bitk = i;
codec.AvailableBytesIn = num2;
codec.TotalBytesIn += (long)(num - codec.NextIn);
codec.NextIn = num;
blocks.writeAt = num4;
return(blocks.Flush(r));
}
// Token: 0x0600074F RID: 1871 RVA: 0x000323C8 File Offset: 0x000305C8
internal static int inflate_trees_fixed(int[] bl, int[] bd, int[][] tl, int[][] td, Class_212 z)
{
bl[0] = 9;
bd[0] = 5;
tl[0] = Class_197.fixed_tl;
td[0] = Class_197.fixed_td;
return(0);
}
// Token: 0x0600074E RID: 1870 RVA: 0x000322A0 File Offset: 0x000304A0
internal int inflate_trees_dynamic(int nl, int nd, int[] c, int[] bl, int[] bd, int[] tl, int[] td, int[] hp, Class_212 z)
{
this.initWorkArea(288);
this.hn[0] = 0;
int num = this.huft_build(c, 0, nl, 257, Class_197.cplens, Class_197.cplext, tl, bl, hp, this.hn, this.v);
if (num != 0 || bl[0] == 0)
{
if (num == -3)
{
z.Message = "oversubscribed literal/length tree";
}
else if (num != -4)
{
z.Message = "incomplete literal/length tree";
num = -3;
}
return(num);
}
this.initWorkArea(288);
num = this.huft_build(c, nl, nd, 0, Class_197.cpdist, Class_197.cpdext, td, bd, hp, this.hn, this.v);
if (num != 0 || (bd[0] == 0 && nl > 257))
{
if (num == -3)
{
z.Message = "oversubscribed distance tree";
}
else if (num == -5)
{
z.Message = "incomplete distance tree";
num = -3;
}
else if (num != -4)
{
z.Message = "empty distance tree with lengths";
num = -3;
}
return(num);
}
return(0);
}
