using System;

namespace Ionic.Zlib
{
	internal sealed class InfTree
	{
		private const int MANY = 1440;

		private const int Z_OK = 0;

		private const int Z_STREAM_END = 1;

		private const int Z_NEED_DICT = 2;

		private const int Z_ERRNO = -1;

		private const int Z_STREAM_ERROR = -2;

		private const int Z_DATA_ERROR = -3;

		private const int Z_MEM_ERROR = -4;

		private const int Z_BUF_ERROR = -5;

		private const int Z_VERSION_ERROR = -6;

		internal const int fixed_bl = 9;

		internal const int fixed_bd = 5;

		internal static readonly int[] fixed_tl = new int[]
		{
			96,
			7,
			256,
			0,
			8,
			80,
			0,
			8,
			16,
			84,
			8,
			115,
			82,
			7,
			31,
			0,
			8,
			112,
			0,
			8,
			48,
			0,
			9,
			192,
			80,
			7,
			10,
			0,
			8,
			96,
			0,
			8,
			32,
			0,
			9,
			160,
			0,
			8,
			0,
			0,
			8,
			128,
			0,
			8,
			64,
			0,
			9,
			224,
			80,
			7,
			6,
			0,
			8,
			88,
			0,
			8,
			24,
			0,
			9,
			144,
			83,
			7,
			59,
			0,
			8,
			120,
			0,
			8,
			56,
			0,
			9,
			208,
			81,
			7,
			17,
			0,
			8,
			104,
			0,
			8,
			40,
			0,
			9,
			176,
			0,
			8,
			8,
			0,
			8,
			136,
			0,
			8,
			72,
			0,
			9,
			240,
			80,
			7,
			4,
			0,
			8,
			84,
			0,
			8,
			20,
			85,
			8,
			227,
			83,
			7,
			43,
			0,
			8,
			116,
			0,
			8,
			52,
			0,
			9,
			200,
			81,
			7,
			13,
			0,
			8,
			100,
			0,
			8,
			36,
			0,
			9,
			168,
			0,
			8,
			4,
			0,
			8,
			132,
			0,
			8,
			68,
			0,
			9,
			232,
			80,
			7,
			8,
			0,
			8,
			92,
			0,
			8,
			28,
			0,
			9,
			152,
			84,
			7,
			83,
			0,
			8,
			124,
			0,
			8,
			60,
			0,
			9,
			216,
			82,
			7,
			23,
			0,
			8,
			108,
			0,
			8,
			44,
			0,
			9,
			184,
			0,
			8,
			12,
			0,
			8,
			140,
			0,
			8,
			76,
			0,
			9,
			248,
			80,
			7,
			3,
			0,
			8,
			82,
			0,
			8,
			18,
			85,
			8,
			163,
			83,
			7,
			35,
			0,
			8,
			114,
			0,
			8,
			50,
			0,
			9,
			196,
			81,
			7,
			11,
			0,
			8,
			98,
			0,
			8,
			34,
			0,
			9,
			164,
			0,
			8,
			2,
			0,
			8,
			130,
			0,
			8,
			66,
			0,
			9,
			228,
			80,
			7,
			7,
			0,
			8,
			90,
			0,
			8,
			26,
			0,
			9,
			148,
			84,
			7,
			67,
			0,
			8,
			122,
			0,
			8,
			58,
			0,
			9,
			212,
			82,
			7,
			19,
			0,
			8,
			106,
			0,
			8,
			42,
			0,
			9,
			180,
			0,
			8,
			10,
			0,
			8,
			138,
			0,
			8,
			74,
			0,
			9,
			244,
			80,
			7,
			5,
			0,
			8,
			86,
			0,
			8,
			22,
			192,
			8,
			0,
			83,
			7,
			51,
			0,
			8,
			118,
			0,
			8,
			54,
			0,
			9,
			204,
			81,
			7,
			15,
			0,
			8,
			102,
			0,
			8,
			38,
			0,
			9,
			172,
			0,
			8,
			6,
			0,
			8,
			134,
			0,
			8,
			70,
			0,
			9,
			236,
			80,
			7,
			9,
			0,
			8,
			94,
			0,
			8,
			30,
			0,
			9,
			156,
			84,
			7,
			99,
			0,
			8,
			126,
			0,
			8,
			62,
			0,
			9,
			220,
			82,
			7,
			27,
			0,
			8,
			110,
			0,
			8,
			46,
			0,
			9,
			188,
			0,
			8,
			14,
			0,
			8,
			142,
			0,
			8,
			78,
			0,
			9,
			252,
			96,
			7,
			256,
			0,
			8,
			81,
			0,
			8,
			17,
			85,
			8,
			131,
			82,
			7,
			31,
			0,
			8,
			113,
			0,
			8,
			49,
			0,
			9,
			194,
			80,
			7,
			10,
			0,
			8,
			97,
			0,
			8,
			33,
			0,
			9,
			162,
			0,
			8,
			1,
			0,
			8,
			129,
			0,
			8,
			65,
			0,
			9,
			226,
			80,
			7,
			6,
			0,
			8,
			89,
			0,
			8,
			25,
			0,
			9,
			146,
			83,
			7,
			59,
			0,
			8,
			121,
			0,
			8,
			57,
			0,
			9,
			210,
			81,
			7,
			17,
			0,
			8,
			105,
			0,
			8,
			41,
			0,
			9,
			178,
			0,
			8,
			9,
			0,
			8,
			137,
			0,
			8,
			73,
			0,
			9,
			242,
			80,
			7,
			4,
			0,
			8,
			85,
			0,
			8,
			21,
			80,
			8,
			258,
			83,
			7,
			43,
			0,
			8,
			117,
			0,
			8,
			53,
			0,
			9,
			202,
			81,
			7,
			13,
			0,
			8,
			101,
			0,
			8,
			37,
			0,
			9,
			170,
			0,
			8,
			5,
			0,
			8,
			133,
			0,
			8,
			69,
			0,
			9,
			234,
			80,
			7,
			8,
			0,
			8,
			93,
			0,
			8,
			29,
			0,
			9,
			154,
			84,
			7,
			83,
			0,
			8,
			125,
			0,
			8,
			61,
			0,
			9,
			218,
			82,
			7,
			23,
			0,
			8,
			109,
			0,
			8,
			45,
			0,
			9,
			186,
			0,
			8,
			13,
			0,
			8,
			141,
			0,
			8,
			77,
			0,
			9,
			250,
			80,
			7,
			3,
			0,
			8,
			83,
			0,
			8,
			19,
			85,
			8,
			195,
			83,
			7,
			35,
			0,
			8,
			115,
			0,
			8,
			51,
			0,
			9,
			198,
			81,
			7,
			11,
			0,
			8,
			99,
			0,
			8,
			35,
			0,
			9,
			166,
			0,
			8,
			3,
			0,
			8,
			131,
			0,
			8,
			67,
			0,
			9,
			230,
			80,
			7,
			7,
			0,
			8,
			91,
			0,
			8,
			27,
			0,
			9,
			150,
			84,
			7,
			67,
			0,
			8,
			123,
			0,
			8,
			59,
			0,
			9,
			214,
			82,
			7,
			19,
			0,
			8,
			107,
			0,
			8,
			43,
			0,
			9,
			182,
			0,
			8,
			11,
			0,
			8,
			139,
			0,
			8,
			75,
			0,
			9,
			246,
			80,
			7,
			5,
			0,
			8,
			87,
			0,
			8,
			23,
			192,
			8,
			0,
			83,
			7,
			51,
			0,
			8,
			119,
			0,
			8,
			55,
			0,
			9,
			206,
			81,
			7,
			15,
			0,
			8,
			103,
			0,
			8,
			39,
			0,
			9,
			174,
			0,
			8,
			7,
			0,
			8,
			135,
			0,
			8,
			71,
			0,
			9,
			238,
			80,
			7,
			9,
			0,
			8,
			95,
			0,
			8,
			31,
			0,
			9,
			158,
			84,
			7,
			99,
			0,
			8,
			127,
			0,
			8,
			63,
			0,
			9,
			222,
			82,
			7,
			27,
			0,
			8,
			111,
			0,
			8,
			47,
			0,
			9,
			190,
			0,
			8,
			15,
			0,
			8,
			143,
			0,
			8,
			79,
			0,
			9,
			254,
			96,
			7,
			256,
			0,
			8,
			80,
			0,
			8,
			16,
			84,
			8,
			115,
			82,
			7,
			31,
			0,
			8,
			112,
			0,
			8,
			48,
			0,
			9,
			193,
			80,
			7,
			10,
			0,
			8,
			96,
			0,
			8,
			32,
			0,
			9,
			161,
			0,
			8,
			0,
			0,
			8,
			128,
			0,
			8,
			64,
			0,
			9,
			225,
			80,
			7,
			6,
			0,
			8,
			88,
			0,
			8,
			24,
			0,
			9,
			145,
			83,
			7,
			59,
			0,
			8,
			120,
			0,
			8,
			56,
			0,
			9,
			209,
			81,
			7,
			17,
			0,
			8,
			104,
			0,
			8,
			40,
			0,
			9,
			177,
			0,
			8,
			8,
			0,
			8,
			136,
			0,
			8,
			72,
			0,
			9,
			241,
			80,
			7,
			4,
			0,
			8,
			84,
			0,
			8,
			20,
			85,
			8,
			227,
			83,
			7,
			43,
			0,
			8,
			116,
			0,
			8,
			52,
			0,
			9,
			201,
			81,
			7,
			13,
			0,
			8,
			100,
			0,
			8,
			36,
			0,
			9,
			169,
			0,
			8,
			4,
			0,
			8,
			132,
			0,
			8,
			68,
			0,
			9,
			233,
			80,
			7,
			8,
			0,
			8,
			92,
			0,
			8,
			28,
			0,
			9,
			153,
			84,
			7,
			83,
			0,
			8,
			124,
			0,
			8,
			60,
			0,
			9,
			217,
			82,
			7,
			23,
			0,
			8,
			108,
			0,
			8,
			44,
			0,
			9,
			185,
			0,
			8,
			12,
			0,
			8,
			140,
			0,
			8,
			76,
			0,
			9,
			249,
			80,
			7,
			3,
			0,
			8,
			82,
			0,
			8,
			18,
			85,
			8,
			163,
			83,
			7,
			35,
			0,
			8,
			114,
			0,
			8,
			50,
			0,
			9,
			197,
			81,
			7,
			11,
			0,
			8,
			98,
			0,
			8,
			34,
			0,
			9,
			165,
			0,
			8,
			2,
			0,
			8,
			130,
			0,
			8,
			66,
			0,
			9,
			229,
			80,
			7,
			7,
			0,
			8,
			90,
			0,
			8,
			26,
			0,
			9,
			149,
			84,
			7,
			67,
			0,
			8,
			122,
			0,
			8,
			58,
			0,
			9,
			213,
			82,
			7,
			19,
			0,
			8,
			106,
			0,
			8,
			42,
			0,
			9,
			181,
			0,
			8,
			10,
			0,
			8,
			138,
			0,
			8,
			74,
			0,
			9,
			245,
			80,
			7,
			5,
			0,
			8,
			86,
			0,
			8,
			22,
			192,
			8,
			0,
			83,
			7,
			51,
			0,
			8,
			118,
			0,
			8,
			54,
			0,
			9,
			205,
			81,
			7,
			15,
			0,
			8,
			102,
			0,
			8,
			38,
			0,
			9,
			173,
			0,
			8,
			6,
			0,
			8,
			134,
			0,
			8,
			70,
			0,
			9,
			237,
			80,
			7,
			9,
			0,
			8,
			94,
			0,
			8,
			30,
			0,
			9,
			157,
			84,
			7,
			99,
			0,
			8,
			126,
			0,
			8,
			62,
			0,
			9,
			221,
			82,
			7,
			27,
			0,
			8,
			110,
			0,
			8,
			46,
			0,
			9,
			189,
			0,
			8,
			14,
			0,
			8,
			142,
			0,
			8,
			78,
			0,
			9,
			253,
			96,
			7,
			256,
			0,
			8,
			81,
			0,
			8,
			17,
			85,
			8,
			131,
			82,
			7,
			31,
			0,
			8,
			113,
			0,
			8,
			49,
			0,
			9,
			195,
			80,
			7,
			10,
			0,
			8,
			97,
			0,
			8,
			33,
			0,
			9,
			163,
			0,
			8,
			1,
			0,
			8,
			129,
			0,
			8,
			65,
			0,
			9,
			227,
			80,
			7,
			6,
			0,
			8,
			89,
			0,
			8,
			25,
			0,
			9,
			147,
			83,
			7,
			59,
			0,
			8,
			121,
			0,
			8,
			57,
			0,
			9,
			211,
			81,
			7,
			17,
			0,
			8,
			105,
			0,
			8,
			41,
			0,
			9,
			179,
			0,
			8,
			9,
			0,
			8,
			137,
			0,
			8,
			73,
			0,
			9,
			243,
			80,
			7,
			4,
			0,
			8,
			85,
			0,
			8,
			21,
			80,
			8,
			258,
			83,
			7,
			43,
			0,
			8,
			117,
			0,
			8,
			53,
			0,
			9,
			203,
			81,
			7,
			13,
			0,
			8,
			101,
			0,
			8,
			37,
			0,
			9,
			171,
			0,
			8,
			5,
			0,
			8,
			133,
			0,
			8,
			69,
			0,
			9,
			235,
			80,
			7,
			8,
			0,
			8,
			93,
			0,
			8,
			29,
			0,
			9,
			155,
			84,
			7,
			83,
			0,
			8,
			125,
			0,
			8,
			61,
			0,
			9,
			219,
			82,
			7,
			23,
			0,
			8,
			109,
			0,
			8,
			45,
			0,
			9,
			187,
			0,
			8,
			13,
			0,
			8,
			141,
			0,
			8,
			77,
			0,
			9,
			251,
			80,
			7,
			3,
			0,
			8,
			83,
			0,
			8,
			19,
			85,
			8,
			195,
			83,
			7,
			35,
			0,
			8,
			115,
			0,
			8,
			51,
			0,
			9,
			199,
			81,
			7,
			11,
			0,
			8,
			99,
			0,
			8,
			35,
			0,
			9,
			167,
			0,
			8,
			3,
			0,
			8,
			131,
			0,
			8,
			67,
			0,
			9,
			231,
			80,
			7,
			7,
			0,
			8,
			91,
			0,
			8,
			27,
			0,
			9,
			151,
			84,
			7,
			67,
			0,
			8,
			123,
			0,
			8,
			59,
			0,
			9,
			215,
			82,
			7,
			19,
			0,
			8,
			107,
			0,
			8,
			43,
			0,
			9,
			183,
			0,
			8,
			11,
			0,
			8,
			139,
			0,
			8,
			75,
			0,
			9,
			247,
			80,
			7,
			5,
			0,
			8,
			87,
			0,
			8,
			23,
			192,
			8,
			0,
			83,
			7,
			51,
			0,
			8,
			119,
			0,
			8,
			55,
			0,
			9,
			207,
			81,
			7,
			15,
			0,
			8,
			103,
			0,
			8,
			39,
			0,
			9,
			175,
			0,
			8,
			7,
			0,
			8,
			135,
			0,
			8,
			71,
			0,
			9,
			239,
			80,
			7,
			9,
			0,
			8,
			95,
			0,
			8,
			31,
			0,
			9,
			159,
			84,
			7,
			99,
			0,
			8,
			127,
			0,
			8,
			63,
			0,
			9,
			223,
			82,
			7,
			27,
			0,
			8,
			111,
			0,
			8,
			47,
			0,
			9,
			191,
			0,
			8,
			15,
			0,
			8,
			143,
			0,
			8,
			79,
			0,
			9,
			255
		};

		internal static readonly int[] fixed_td = new int[]
		{
			80,
			5,
			1,
			87,
			5,
			257,
			83,
			5,
			17,
			91,
			5,
			4097,
			81,
			5,
			5,
			89,
			5,
			1025,
			85,
			5,
			65,
			93,
			5,
			16385,
			80,
			5,
			3,
			88,
			5,
			513,
			84,
			5,
			33,
			92,
			5,
			8193,
			82,
			5,
			9,
			90,
			5,
			2049,
			86,
			5,
			129,
			192,
			5,
			24577,
			80,
			5,
			2,
			87,
			5,
			385,
			83,
			5,
			25,
			91,
			5,
			6145,
			81,
			5,
			7,
			89,
			5,
			1537,
			85,
			5,
			97,
			93,
			5,
			24577,
			80,
			5,
			4,
			88,
			5,
			769,
			84,
			5,
			49,
			92,
			5,
			12289,
			82,
			5,
			13,
			90,
			5,
			3073,
			86,
			5,
			193,
			192,
			5,
			24577
		};

		internal static readonly int[] cplens = new int[]
		{
			3,
			4,
			5,
			6,
			7,
			8,
			9,
			10,
			11,
			13,
			15,
			17,
			19,
			23,
			27,
			31,
			35,
			43,
			51,
			59,
			67,
			83,
			99,
			115,
			131,
			163,
			195,
			227,
			258,
			0,
			0
		};

		internal static readonly int[] cplext = new int[]
		{
			0,
			0,
			0,
			0,
			0,
			0,
			0,
			0,
			1,
			1,
			1,
			1,
			2,
			2,
			2,
			2,
			3,
			3,
			3,
			3,
			4,
			4,
			4,
			4,
			5,
			5,
			5,
			5,
			0,
			112,
			112
		};

		internal static readonly int[] cpdist = new int[]
		{
			1,
			2,
			3,
			4,
			5,
			7,
			9,
			13,
			17,
			25,
			33,
			49,
			65,
			97,
			129,
			193,
			257,
			385,
			513,
			769,
			1025,
			1537,
			2049,
			3073,
			4097,
			6145,
			8193,
			12289,
			16385,
			24577
		};

		internal static readonly int[] cpdext = new int[]
		{
			0,
			0,
			0,
			0,
			1,
			1,
			2,
			2,
			3,
			3,
			4,
			4,
			5,
			5,
			6,
			6,
			7,
			7,
			8,
			8,
			9,
			9,
			10,
			10,
			11,
			11,
			12,
			12,
			13,
			13
		};

		internal const int BMAX = 15;

		internal int[] hn = null;

		internal int[] v = null;

		internal int[] c = null;

		internal int[] r = null;

		internal int[] u = null;

		internal int[] x = null;

		private 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 num = 0;
			int i = n;
			do
			{
				this.c[b[bindex + num]]++;
				num++;
				i--;
			}
			while (i != 0);
			bool flag = this.c[0] == n;
			int result;
			if (flag)
			{
				t[0] = -1;
				m[0] = 0;
				result = 0;
			}
			else
			{
				int num2 = m[0];
				int j;
				for (j = 1; j <= 15; j++)
				{
					bool flag2 = this.c[j] != 0;
					if (flag2)
					{
						break;
					}
				}
				int k = j;
				bool flag3 = num2 < j;
				if (flag3)
				{
					num2 = j;
				}
				for (i = 15; i != 0; i--)
				{
					bool flag4 = this.c[i] != 0;
					if (flag4)
					{
						break;
					}
				}
				int num3 = i;
				bool flag5 = num2 > i;
				if (flag5)
				{
					num2 = i;
				}
				m[0] = num2;
				int num4 = 1 << j;
				while (j < i)
				{
					bool flag6 = (num4 -= this.c[j]) < 0;
					if (flag6)
					{
						return -3;
					}
					j++;
					num4 <<= 1;
				}
				bool flag7 = (num4 -= this.c[i]) < 0;
				if (flag7)
				{
					result = -3;
				}
				else
				{
					this.c[i] += num4;
					j = (this.x[1] = 0);
					num = 1;
					int num5 = 2;
					while (--i != 0)
					{
						j = (this.x[num5] = j + this.c[num]);
						num5++;
						num++;
					}
					i = 0;
					num = 0;
					do
					{
						bool flag8 = (j = b[bindex + num]) != 0;
						if (flag8)
						{
							int[] array = this.x;
							int num6 = j;
							int num7 = array[num6];
							array[num6] = num7 + 1;
							v[num7] = i;
						}
						num++;
					}
					while (++i < n);
					n = this.x[num3];
					i = (this.x[0] = 0);
					num = 0;
					int num8 = -1;
					int num9 = -num2;
					this.u[0] = 0;
					int num10 = 0;
					int num11 = 0;
					while (k <= num3)
					{
						int num12 = this.c[k];
						while (num12-- != 0)
						{
							int num13;
							while (k > num9 + num2)
							{
								num8++;
								num9 += num2;
								num11 = num3 - num9;
								num11 = ((num11 > num2) ? num2 : num11);
								bool flag9 = (num13 = 1 << ((j = k - num9) & 31)) > num12 + 1;
								if (flag9)
								{
									num13 -= num12 + 1;
									num5 = k;
									bool flag10 = j < num11;
									if (flag10)
									{
										while (++j < num11)
										{
											bool flag11 = (num13 <<= 1) <= this.c[++num5];
											if (flag11)
											{
												break;
											}
											num13 -= this.c[num5];
										}
									}
								}
								num11 = 1 << j;
								bool flag12 = hn[0] + num11 > 1440;
								if (flag12)
								{
									return -3;
								}
								num10 = (this.u[num8] = hn[0]);
								hn[0] += num11;
								bool flag13 = num8 != 0;
								if (flag13)
								{
									this.x[num8] = i;
									this.r[0] = (int)((sbyte)j);
									this.r[1] = (int)((sbyte)num2);
									j = SharedUtils.URShift(i, num9 - num2);
									this.r[2] = num10 - this.u[num8 - 1] - j;
									Array.Copy(this.r, 0, hp, (this.u[num8 - 1] + j) * 3, 3);
								}
								else
								{
									t[0] = num10;
								}
							}
							this.r[1] = (int)((sbyte)(k - num9));
							bool flag14 = num >= n;
							if (flag14)
							{
								this.r[0] = 192;
							}
							else
							{
								bool flag15 = v[num] < s;
								if (flag15)
								{
									this.r[0] = (int)((v[num] < 256) ? 0 : 96);
									this.r[2] = v[num++];
								}
								else
								{
									this.r[0] = (int)((sbyte)(e[v[num] - s] + 16 + 64));
									this.r[2] = d[v[num++] - s];
								}
							}
							num13 = 1 << k - num9;
							for (j = SharedUtils.URShift(i, num9); j < num11; j += num13)
							{
								Array.Copy(this.r, 0, hp, (num10 + j) * 3, 3);
							}
							j = 1 << k - 1;
							while ((i & j) != 0)
							{
								i ^= j;
								j = SharedUtils.URShift(j, 1);
							}
							i ^= j;
							int num14 = (1 << num9) - 1;
							while ((i & num14) != this.x[num8])
							{
								num8--;
								num9 -= num2;
								num14 = (1 << num9) - 1;
							}
						}
						k++;
					}
					result = ((num4 != 0 && num3 != 1) ? -5 : 0);
				}
			}
			return result;
		}

		internal int inflate_trees_bits(int[] c, int[] bb, int[] tb, int[] hp, ZlibCodec 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);
			bool flag = num == -3;
			if (flag)
			{
				z.Message = "oversubscribed dynamic bit lengths tree";
			}
			else
			{
				bool flag2 = num == -5 || bb[0] == 0;
				if (flag2)
				{
					z.Message = "incomplete dynamic bit lengths tree";
					num = -3;
				}
			}
			return num;
		}

		internal int inflate_trees_dynamic(int nl, int nd, int[] c, int[] bl, int[] bd, int[] tl, int[] td, int[] hp, ZlibCodec z)
		{
			this.initWorkArea(288);
			this.hn[0] = 0;
			int num = this.huft_build(c, 0, nl, 257, InfTree.cplens, InfTree.cplext, tl, bl, hp, this.hn, this.v);
			bool flag = num != 0 || bl[0] == 0;
			int result;
			if (flag)
			{
				bool flag2 = num == -3;
				if (flag2)
				{
					z.Message = "oversubscribed literal/length tree";
				}
				else
				{
					bool flag3 = num != -4;
					if (flag3)
					{
						z.Message = "incomplete literal/length tree";
						num = -3;
					}
				}
				result = num;
			}
			else
			{
				this.initWorkArea(288);
				num = this.huft_build(c, nl, nd, 0, InfTree.cpdist, InfTree.cpdext, td, bd, hp, this.hn, this.v);
				bool flag4 = num != 0 || (bd[0] == 0 && nl > 257);
				if (flag4)
				{
					bool flag5 = num == -3;
					if (flag5)
					{
						z.Message = "oversubscribed distance tree";
					}
					else
					{
						bool flag6 = num == -5;
						if (flag6)
						{
							z.Message = "incomplete distance tree";
							num = -3;
						}
						else
						{
							bool flag7 = num != -4;
							if (flag7)
							{
								z.Message = "empty distance tree with lengths";
								num = -3;
							}
						}
					}
					result = num;
				}
				else
				{
					result = 0;
				}
			}
			return result;
		}

		internal static int inflate_trees_fixed(int[] bl, int[] bd, int[][] tl, int[][] td, ZlibCodec z)
		{
			bl[0] = 9;
			bd[0] = 5;
			tl[0] = InfTree.fixed_tl;
			td[0] = InfTree.fixed_td;
			return 0;
		}

		private void initWorkArea(int vsize)
		{
			bool flag = this.hn == null;
			if (flag)
			{
				this.hn = new int[1];
				this.v = new int[vsize];
				this.c = new int[16];
				this.r = new int[3];
				this.u = new int[15];
				this.x = new int[16];
			}
			else
			{
				bool flag2 = this.v.Length < vsize;
				if (flag2)
				{
					this.v = new int[vsize];
				}
				Array.Clear(this.v, 0, vsize);
				Array.Clear(this.c, 0, 16);
				this.r[0] = 0;
				this.r[1] = 0;
				this.r[2] = 0;
				Array.Clear(this.u, 0, 15);
				Array.Clear(this.x, 0, 16);
			}
		}
	}
}