com.sun.grizzly.lzma.compression.lzma.Base Maven / Gradle / Ivy

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/*
 *
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright 2007-2010 Sun Microsystems, Inc. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License. You can obtain
 * a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
 * or glassfish/bootstrap/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
 * Sun designates this particular file as subject to the "Classpath" exception
 * as provided by Sun in the GPL Version 2 section of the License file that
 * accompanied this code.  If applicable, add the following below the License
 * Header, with the fields enclosed by brackets [] replaced by your own
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 * only the GPL Version 2, indicate your decision by adding "[Contributor]
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package com.sun.grizzly.lzma.compression.lzma;

/**
 * Base
 *
 * @author Igor Pavlov
 */
public class Base {

    public static final int kNumRepDistances = 4;
    public static final int kNumStates = 12;

    public static final int StateInit() {
        return 0;
    }

    public static final int StateUpdateChar(int index) {
        if (index < 4) {
            return 0;
        }
        if (index < 10) {
            return index - 3;
        }
        return index - 6;
    }

    public static final int StateUpdateMatch(int index) {
        return (index < 7 ? 7 : 10);
    }

    public static final int StateUpdateRep(int index) {
        return (index < 7 ? 8 : 11);
    }

    public static final int StateUpdateShortRep(int index) {
        return (index < 7 ? 9 : 11);
    }

    public static final boolean StateIsCharState(int index) {
        return index < 7;
    }
    public static final int kNumPosSlotBits = 6;
    public static final int kDicLogSizeMin = 0;
    // public static final int kDicLogSizeMax = 28;
    // public static final int kDistTableSizeMax = kDicLogSizeMax * 2;
    public static final int kNumLenToPosStatesBits = 2; // it's for speed optimization
    public static final int kNumLenToPosStates = 1 << kNumLenToPosStatesBits;
    public static final int kMatchMinLen = 2;

    public static final int GetLenToPosState(int len) {
        len -= kMatchMinLen;
        if (len < kNumLenToPosStates) {
            return len;
        }
        return (int) (kNumLenToPosStates - 1);
    }
    public static final int kNumAlignBits = 4;
    public static final int kAlignTableSize = 1 << kNumAlignBits;
    public static final int kAlignMask = (kAlignTableSize - 1);
    public static final int kStartPosModelIndex = 4;
    public static final int kEndPosModelIndex = 14;
    public static final int kNumPosModels = kEndPosModelIndex - kStartPosModelIndex;
    public static final int kNumFullDistances = 1 << (kEndPosModelIndex / 2);
    public static final int kNumLitPosStatesBitsEncodingMax = 4;
    public static final int kNumLitContextBitsMax = 8;
    public static final int kNumPosStatesBitsMax = 4;
    public static final int kNumPosStatesMax = (1 << kNumPosStatesBitsMax);
    public static final int kNumPosStatesBitsEncodingMax = 4;
    public static final int kNumPosStatesEncodingMax = (1 << kNumPosStatesBitsEncodingMax);
    public static final int kNumLowLenBits = 3;
    public static final int kNumMidLenBits = 3;
    public static final int kNumHighLenBits = 8;
    public static final int kNumLowLenSymbols = 1 << kNumLowLenBits;
    public static final int kNumMidLenSymbols = 1 << kNumMidLenBits;
    public static final int kNumLenSymbols = kNumLowLenSymbols + kNumMidLenSymbols +
            (1 << kNumHighLenBits);
    public static final int kMatchMaxLen = kMatchMinLen + kNumLenSymbols - 1;
}