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| 1 | /* | ||
| 2 | * Copyright (c) 2005, 2009, Oracle and/or its affiliates. All rights reserved. | ||
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | ||
| 4 | * | ||
| 5 | * This code is free software; you can redistribute it and/or modify it | ||
| 6 | * under the terms of the GNU General Public License version 2 only, as | ||
| 7 | * published by the Free Software Foundation. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle in the LICENSE file that accompanied this code. | ||
| 10 | * | ||
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT | ||
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | ||
| 14 | * version 2 for more details (a copy is included in the LICENSE file that | ||
| 15 | * accompanied this code). | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU General Public License version | ||
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, | ||
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | ||
| 20 | * | ||
| 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * questions. | ||
| 24 | */ | ||
| 25 | /* | ||
| 26 | ******************************************************************************* | ||
| 27 | * (C) Copyright IBM Corp. and others, 1996-2009 - All Rights Reserved * | ||
| 28 | * * | ||
| 29 | * The original version of this source code and documentation is copyrighted * | ||
| 30 | * and owned by IBM, These materials are provided under terms of a License * | ||
| 31 | * Agreement between IBM and Sun. This technology is protected by multiple * | ||
| 32 | * US and International patents. This notice and attribution to IBM may not * | ||
| 33 | * to removed. * | ||
| 34 | ******************************************************************************* | ||
| 35 | * file name: UBiDiProps.java | ||
| 36 | * encoding: US-ASCII | ||
| 37 | * tab size: 8 (not used) | ||
| 38 | * indentation:4 | ||
| 39 | * | ||
| 40 | * created on: 2005jan16 | ||
| 41 | * created by: Markus W. Scherer | ||
| 42 | * | ||
| 43 | * Low-level Unicode bidi/shaping properties access. | ||
| 44 | * Java port of ubidi_props.h/.c. | ||
| 45 | */ | ||
| 46 | |||
| 47 | package sun.text.normalizer; | ||
| 48 | |||
| 49 | import java.io.BufferedInputStream; | ||
| 50 | import java.io.DataInputStream; | ||
| 51 | import java.io.InputStream; | ||
| 52 | import java.io.IOException; | ||
| 53 | |||
| 54 | public final class UBiDiProps { | ||
| 55 | // constructors etc. --------------------------------------------------- *** | ||
| 56 | |||
| 57 | // port of ubidi_openProps() | ||
| 58 | public UBiDiProps() throws IOException{ | ||
| 59 | InputStream is=ICUData.getStream(DATA_FILE_NAME); | ||
| 60 | BufferedInputStream b=new BufferedInputStream(is, 4096 /* data buffer size */); | ||
| 61 | readData(b); | ||
| 62 | b.close(); | ||
| 63 | is.close(); | ||
| 64 | |||
| 65 | } | ||
| 66 | |||
| 67 | private void readData(InputStream is) throws IOException { | ||
| 68 | DataInputStream inputStream=new DataInputStream(is); | ||
| 69 | |||
| 70 | // read the header | ||
| 71 | ICUBinary.readHeader(inputStream, FMT, new IsAcceptable()); | ||
| 72 | |||
| 73 | // read indexes[] | ||
| 74 | int i, count; | ||
| 75 | count=inputStream.readInt(); | ||
| 76 | if(count<IX_INDEX_TOP) { | ||
| 77 | throw new IOException("indexes[0] too small in "+DATA_FILE_NAME); | ||
| 78 | } | ||
| 79 | indexes=new int[count]; | ||
| 80 | |||
| 81 | indexes[0]=count; | ||
| 82 | for(i=1; i<count; ++i) { | ||
| 83 | indexes[i]=inputStream.readInt(); | ||
| 84 | } | ||
| 85 | |||
| 86 | // read the trie | ||
| 87 | trie=new CharTrie(inputStream, null); | ||
| 88 | |||
| 89 | // read mirrors[] | ||
| 90 | count=indexes[IX_MIRROR_LENGTH]; | ||
| 91 | if(count>0) { | ||
| 92 | mirrors=new int[count]; | ||
| 93 | for(i=0; i<count; ++i) { | ||
| 94 | mirrors[i]=inputStream.readInt(); | ||
| 95 | } | ||
| 96 | } | ||
| 97 | |||
| 98 | // read jgArray[] | ||
| 99 | count=indexes[IX_JG_LIMIT]-indexes[IX_JG_START]; | ||
| 100 | jgArray=new byte[count]; | ||
| 101 | for(i=0; i<count; ++i) { | ||
| 102 | jgArray[i]=inputStream.readByte(); | ||
| 103 | } | ||
| 104 | } | ||
| 105 | |||
| 106 | // implement ICUBinary.Authenticate | ||
| 107 | private final class IsAcceptable implements ICUBinary.Authenticate { | ||
| 108 | public boolean isDataVersionAcceptable(byte version[]) { | ||
| 109 | return version[0]==1 && | ||
| 110 | version[2]==Trie.INDEX_STAGE_1_SHIFT_ && version[3]==Trie.INDEX_STAGE_2_SHIFT_; | ||
| 111 | } | ||
| 112 | } | ||
| 113 | |||
| 114 | // UBiDiProps singleton | ||
| 115 | private static UBiDiProps gBdp=null; | ||
| 116 | |||
| 117 | // port of ubidi_getSingleton() | ||
| 118 | public static final synchronized UBiDiProps getSingleton() throws IOException { | ||
| 119 | if(gBdp==null) { | ||
| 120 | gBdp=new UBiDiProps(); | ||
| 121 | } | ||
| 122 | return gBdp; | ||
| 123 | } | ||
| 124 | |||
| 125 | // UBiDiProps dummy singleton | ||
| 126 | private static UBiDiProps gBdpDummy=null; | ||
| 127 | |||
| 128 | private UBiDiProps(boolean makeDummy) { // ignore makeDummy, only creates a unique signature | ||
| 129 | indexes=new int[IX_TOP]; | ||
| 130 | indexes[0]=IX_TOP; | ||
| 131 | trie=new CharTrie(0, 0, null); // dummy trie, always returns 0 | ||
| 132 | } | ||
| 133 | |||
| 134 | /** | ||
| 135 | * Get a singleton dummy object, one that works with no real data. | ||
| 136 | * This can be used when the real data is not available. | ||
| 137 | * Using the dummy can reduce checks for available data after an initial failure. | ||
| 138 | * Port of ucase_getDummy(). | ||
| 139 | */ | ||
| 140 | public static final synchronized UBiDiProps getDummy() { | ||
| 141 | if(gBdpDummy==null) { | ||
| 142 | gBdpDummy=new UBiDiProps(true); | ||
| 143 | } | ||
| 144 | return gBdpDummy; | ||
| 145 | } | ||
| 146 | |||
| 147 | public final int getClass(int c) { | ||
| 148 | return getClassFromProps(trie.getCodePointValue(c)); | ||
| 149 | } | ||
| 150 | |||
| 151 | // data members -------------------------------------------------------- *** | ||
| 152 | private int indexes[]; | ||
| 153 | private int mirrors[]; | ||
| 154 | private byte jgArray[]; | ||
| 155 | |||
| 156 | private CharTrie trie; | ||
| 157 | |||
| 158 | // data format constants ----------------------------------------------- *** | ||
| 159 | private static final String DATA_FILE_NAME = "/sun/text/resources/ubidi.icu"; | ||
| 160 | |||
| 161 | /* format "BiDi" */ | ||
| 162 | private static final byte FMT[]={ 0x42, 0x69, 0x44, 0x69 }; | ||
| 163 | |||
| 164 | /* indexes into indexes[] */ | ||
| 165 | private static final int IX_INDEX_TOP=0; | ||
| 166 | private static final int IX_MIRROR_LENGTH=3; | ||
| 167 | |||
| 168 | private static final int IX_JG_START=4; | ||
| 169 | private static final int IX_JG_LIMIT=5; | ||
| 170 | |||
| 171 | private static final int IX_TOP=16; | ||
| 172 | |||
| 173 | private static final int CLASS_MASK= 0x0000001f; | ||
| 174 | |||
| 175 | private static final int getClassFromProps(int props) { | ||
| 176 | return props&CLASS_MASK; | ||
| 177 | } | ||
| 178 | |||
| 179 | } | ||