// DeflaterConstants.cs
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//
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// Copyright (C) 2001 Mike Krueger
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// Copyright (C) 2004 John Reilly
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//
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// This file was translated from java, it was part of the GNU Classpath
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// Copyright (C) 2001 Free Software Foundation, Inc.
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License
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// as published by the Free Software Foundation; either version 2
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// of the License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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//
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// Linking this library statically or dynamically with other modules is
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// making a combined work based on this library. Thus, the terms and
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// conditions of the GNU General Public License cover the whole
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// combination.
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//
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// As a special exception, the copyright holders of this library give you
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// permission to link this library with independent modules to produce an
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// executable, regardless of the license terms of these independent
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// modules, and to copy and distribute the resulting executable under
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// terms of your choice, provided that you also meet, for each linked
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// independent module, the terms and conditions of the license of that
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// module. An independent module is a module which is not derived from
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// or based on this library. If you modify this library, you may extend
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// this exception to your version of the library, but you are not
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// obligated to do so. If you do not wish to do so, delete this
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// exception statement from your version.
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using System;
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namespace ICSharpCode.SharpZipLib.Zip.Compression
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{
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/// <summary>
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/// This class contains constants used for deflation.
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/// </summary>
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public class DeflaterConstants
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{
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/// <summary>
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/// Set to true to enable debugging
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/// </summary>
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public const bool DEBUGGING = false;
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/// <summary>
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/// Written to Zip file to identify a stored block
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/// </summary>
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public const int STORED_BLOCK = 0;
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/// <summary>
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/// Identifies static tree in Zip file
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/// </summary>
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public const int STATIC_TREES = 1;
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/// <summary>
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/// Identifies dynamic tree in Zip file
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/// </summary>
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public const int DYN_TREES = 2;
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/// <summary>
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/// Header flag indicating a preset dictionary for deflation
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/// </summary>
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public const int PRESET_DICT = 0x20;
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/// <summary>
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/// Sets internal buffer sizes for Huffman encoding
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/// </summary>
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public const int DEFAULT_MEM_LEVEL = 8;
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/// <summary>
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/// Internal compression engine constant
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/// </summary>
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public const int MAX_MATCH = 258;
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/// <summary>
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/// Internal compression engine constant
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/// </summary>
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public const int MIN_MATCH = 3;
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/// <summary>
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/// Internal compression engine constant
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/// </summary>
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public const int MAX_WBITS = 15;
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/// <summary>
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/// Internal compression engine constant
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/// </summary>
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public const int WSIZE = 1 << MAX_WBITS;
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/// <summary>
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/// Internal compression engine constant
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/// </summary>
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public const int WMASK = WSIZE - 1;
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/// <summary>
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/// Internal compression engine constant
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/// </summary>
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public const int HASH_BITS = DEFAULT_MEM_LEVEL + 7;
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/// <summary>
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/// Internal compression engine constant
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/// </summary>
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public const int HASH_SIZE = 1 << HASH_BITS;
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/// <summary>
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/// Internal compression engine constant
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/// </summary>
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public const int HASH_MASK = HASH_SIZE - 1;
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/// <summary>
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/// Internal compression engine constant
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/// </summary>
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public const int HASH_SHIFT = (HASH_BITS + MIN_MATCH - 1) / MIN_MATCH;
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/// <summary>
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/// Internal compression engine constant
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/// </summary>
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public const int MIN_LOOKAHEAD = MAX_MATCH + MIN_MATCH + 1;
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/// <summary>
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/// Internal compression engine constant
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/// </summary>
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public const int MAX_DIST = WSIZE - MIN_LOOKAHEAD;
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/// <summary>
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/// Internal compression engine constant
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/// </summary>
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public const int PENDING_BUF_SIZE = 1 << (DEFAULT_MEM_LEVEL + 8);
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/// <summary>
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/// Internal compression engine constant
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/// </summary>
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public static int MAX_BLOCK_SIZE = Math.Min(65535, PENDING_BUF_SIZE - 5);
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/// <summary>
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/// Internal compression engine constant
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/// </summary>
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public const int DEFLATE_STORED = 0;
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/// <summary>
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/// Internal compression engine constant
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/// </summary>
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public const int DEFLATE_FAST = 1;
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/// <summary>
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/// Internal compression engine constant
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/// </summary>
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public const int DEFLATE_SLOW = 2;
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/// <summary>
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/// Internal compression engine constant
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/// </summary>
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public static int[] GOOD_LENGTH = { 0, 4, 4, 4, 4, 8, 8, 8, 32, 32 };
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/// <summary>
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/// Internal compression engine constant
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/// </summary>
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public static int[] MAX_LAZY = { 0, 4, 5, 6, 4, 16, 16, 32, 128, 258 };
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/// <summary>
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/// Internal compression engine constant
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/// </summary>
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public static int[] NICE_LENGTH = { 0, 8, 16, 32, 16, 32, 128, 128, 258, 258 };
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/// <summary>
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/// Internal compression engine constant
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/// </summary>
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public static int[] MAX_CHAIN = { 0, 4, 8, 32, 16, 32, 128, 256, 1024, 4096 };
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/// <summary>
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/// Internal compression engine constant
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/// </summary>
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public static int[] COMPR_FUNC = { 0, 1, 1, 1, 1, 2, 2, 2, 2, 2 };
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}
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}
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