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/*
*******************************************************************************
*
*   Copyright (C) 2004-2011, International Business Machines
*   Corporation and others.  All Rights Reserved.
*
*******************************************************************************
*   file name:  UBiDiProps.java
*   encoding:   US-ASCII
*   tab size:   8 (not used)
*   indentation:4
*
*   created on: 2005jan16
*   created by: Markus W. Scherer
*
*   Low-level Unicode bidi/shaping properties access.
*   Java port of ubidi_props.h/.c.
*/

package com.ibm.icu.impl;

import java.io.BufferedInputStream;
import java.io.DataInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Iterator;

import com.ibm.icu.lang.UCharacter;
import com.ibm.icu.lang.UProperty;
import com.ibm.icu.text.UnicodeSet;

public final class UBiDiProps {
    // constructors etc. --------------------------------------------------- ***

    // port of ubidi_openProps()
    private UBiDiProps() throws IOException{
        InputStream is=ICUData.getStream(ICUResourceBundle.ICU_BUNDLE+"/"+DATA_FILE_NAME);
        BufferedInputStream b=new BufferedInputStream(is, 4096 /* data buffer size */);
        readData(b);
        b.close();
        is.close();
    }

    private void readData(InputStream is) throws IOException {
        DataInputStream inputStream=new DataInputStream(is);

        // read the header
        ICUBinary.readHeader(inputStream, FMT, new IsAcceptable());

        // read indexes[]
        int i, count;
        count=inputStream.readInt();
        if(countexpectedTrieLength) {
            throw new IOException(DATA_FILE_NAME+": not enough bytes for the trie");
        }
        // skip padding after trie bytes
        inputStream.skipBytes(expectedTrieLength-trieLength);

        // read mirrors[]
        count=indexes[IX_MIRROR_LENGTH];
        if(count>0) {
            mirrors=new int[count];
            for(i=0; i trieIterator=trie.iterator();
        Trie2.Range range;
        while(trieIterator.hasNext() && !(range=trieIterator.next()).leadSurrogate) {
            set.add(range.startCodePoint);
        }

        /* add the code points from the bidi mirroring table */
        length=indexes[IX_MIRROR_LENGTH];
        for(i=0; i>MAX_JG_SHIFT;
        case UProperty.JOINING_TYPE:
            return (max&JT_MASK)>>JT_SHIFT;
        default:
            return -1; /* undefined */
        }
    }

    public final int getClass(int c) {
        return getClassFromProps(trie.get(c));
    }

    public final boolean isMirrored(int c) {
        return getFlagFromProps(trie.get(c), IS_MIRRORED_SHIFT);
    }

    public final int getMirror(int c) {
        int props;
        int delta;

        props=trie.get(c);
        delta=((short)props)>>MIRROR_DELTA_SHIFT;
        if(delta!=ESC_MIRROR_DELTA) {
            return c+delta;
        } else {
            /* look for mirror code point in the mirrors[] table */
            int m;
            int i, length;
            int c2;

            length=indexes[IX_MIRROR_LENGTH];

            /* linear search */
            for(i=0; i>JT_SHIFT;
    }

    public final int getJoiningGroup(int c) {
        int start, limit;

        start=indexes[IX_JG_START];
        limit=indexes[IX_JG_LIMIT];
        if(start<=c && c>shift)&1)!=0;
    }

    private static final int ESC_MIRROR_DELTA=-4;
    //private static final int MIN_MIRROR_DELTA=-3;
    //private static final int MAX_MIRROR_DELTA=3;

    // definitions for 32-bit mirror table entry --------------------------- ***

    /* the source Unicode code point takes 21 bits (20..0) */
    private static final int MIRROR_INDEX_SHIFT=21;
    //private static final int MAX_MIRROR_INDEX=0x7ff;

    private static final int getMirrorCodePoint(int m) {
        return m&0x1fffff;
    }
    private static final int getMirrorIndex(int m) {
        return m>>>MIRROR_INDEX_SHIFT;
    }


    /*
     * public singleton instance
     */
    public static final UBiDiProps INSTANCE;

    // This static initializer block must be placed after
    // other static member initialization
    static {
        try {
            INSTANCE = new UBiDiProps();
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }
}