| /* |
| * Copyright (c) 2005, 2015, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| /* |
| ******************************************************************************* |
| * |
| * Copyright (C) 2004-2014, 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 sun.text.normalizer; |
| |
| import java.io.IOException; |
| import java.nio.ByteBuffer; |
| import java.util.MissingResourceException; |
| |
| public final class UBiDiProps { |
| // constructors etc. --------------------------------------------------- *** |
| |
| // port of ubidi_openProps() |
| private UBiDiProps() throws IOException{ |
| ByteBuffer bytes=ICUBinary.getRequiredData(DATA_FILE_NAME); |
| readData(bytes); |
| } |
| |
| private void readData(ByteBuffer bytes) throws IOException { |
| // read the header |
| ICUBinary.readHeader(bytes, FMT, new IsAcceptable()); |
| |
| // read indexes[] |
| int i, count; |
| count=bytes.getInt(); |
| if(count<IX_TOP) { |
| throw new IOException("indexes[0] too small in "+DATA_FILE_NAME); |
| } |
| indexes=new int[count]; |
| |
| indexes[0]=count; |
| for(i=1; i<count; ++i) { |
| indexes[i]=bytes.getInt(); |
| } |
| |
| // read the trie |
| trie=Trie2_16.createFromSerialized(bytes); |
| int expectedTrieLength=indexes[IX_TRIE_SIZE]; |
| int trieLength=trie.getSerializedLength(); |
| if(trieLength>expectedTrieLength) { |
| throw new IOException(DATA_FILE_NAME+": not enough bytes for the trie"); |
| } |
| // skip padding after trie bytes |
| ICUBinary.skipBytes(bytes, expectedTrieLength-trieLength); |
| |
| // read mirrors[] |
| count=indexes[IX_MIRROR_LENGTH]; |
| if(count>0) { |
| mirrors=new int[count]; |
| for(i=0; i<count; ++i) { |
| mirrors[i]=bytes.getInt(); |
| } |
| } |
| |
| // read jgArray[] |
| count=indexes[IX_JG_LIMIT]-indexes[IX_JG_START]; |
| jgArray=new byte[count]; |
| for(i=0; i<count; ++i) { |
| jgArray[i]=bytes.get(); |
| } |
| |
| // read jgArray2[] |
| count=indexes[IX_JG_LIMIT2]-indexes[IX_JG_START2]; |
| jgArray2=new byte[count]; |
| for(i=0; i<count; ++i) { |
| jgArray2[i]=bytes.get(); |
| } |
| } |
| |
| // implement ICUBinary.Authenticate |
| private static final class IsAcceptable implements ICUBinary.Authenticate { |
| public boolean isDataVersionAcceptable(byte version[]) { |
| return version[0]==2; |
| } |
| } |
| |
| // property access functions ------------------------------------------- *** |
| |
| public final int getClass(int c) { |
| return getClassFromProps(trie.get(c)); |
| } |
| |
| private final int getMirror(int c, int props) { |
| int delta=getMirrorDeltaFromProps(props); |
| 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<length; ++i) { |
| m=mirrors[i]; |
| c2=getMirrorCodePoint(m); |
| if(c==c2) { |
| /* found c, return its mirror code point using the index in m */ |
| return getMirrorCodePoint(mirrors[getMirrorIndex(m)]); |
| } else if(c<c2) { |
| break; |
| } |
| } |
| |
| /* c not found, return it itself */ |
| return c; |
| } |
| } |
| |
| public final int getMirror(int c) { |
| int props=trie.get(c); |
| return getMirror(c, props); |
| } |
| |
| public final int getJoiningType(int c) { |
| return (trie.get(c)&JT_MASK)>>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<limit) { |
| return (int)jgArray[c-start]&0xff; |
| } |
| start=indexes[IX_JG_START2]; |
| limit=indexes[IX_JG_LIMIT2]; |
| if(start<=c && c<limit) { |
| return (int)jgArray2[c-start]&0xff; |
| } |
| return UCharacter.JoiningGroup.NO_JOINING_GROUP; |
| } |
| |
| public final int getPairedBracketType(int c) { |
| return (trie.get(c)&BPT_MASK)>>BPT_SHIFT; |
| } |
| |
| public final int getPairedBracket(int c) { |
| int props=trie.get(c); |
| if((props&BPT_MASK)==0) { |
| return c; |
| } else { |
| return getMirror(c, props); |
| } |
| } |
| |
| // data members -------------------------------------------------------- *** |
| private int indexes[]; |
| private int mirrors[]; |
| private byte jgArray[]; |
| private byte jgArray2[]; |
| |
| private Trie2_16 trie; |
| |
| // data format constants ----------------------------------------------- *** |
| private static final String DATA_FILE_NAME = "/sun/text/resources/ubidi.icu"; |
| |
| /* format "BiDi" */ |
| private static final int FMT=0x42694469; |
| |
| /* indexes into indexes[] */ |
| private static final int IX_TRIE_SIZE=2; |
| private static final int IX_MIRROR_LENGTH=3; |
| |
| private static final int IX_JG_START=4; |
| private static final int IX_JG_LIMIT=5; |
| private static final int IX_JG_START2=6; /* new in format version 2.2, ICU 54 */ |
| private static final int IX_JG_LIMIT2=7; |
| |
| private static final int IX_TOP=16; |
| |
| // definitions for 16-bit bidi/shaping properties word ----------------- *** |
| |
| /* CLASS_SHIFT=0, */ /* bidi class: 5 bits (4..0) */ |
| private static final int JT_SHIFT=5; /* joining type: 3 bits (7..5) */ |
| |
| private static final int BPT_SHIFT=8; /* Bidi_Paired_Bracket_Type(bpt): 2 bits (9..8) */ |
| |
| private static final int MIRROR_DELTA_SHIFT=13; /* bidi mirroring delta: 3 bits (15..13) */ |
| |
| private static final int CLASS_MASK= 0x0000001f; |
| private static final int JT_MASK= 0x000000e0; |
| private static final int BPT_MASK= 0x00000300; |
| |
| private static final int getClassFromProps(int props) { |
| return props&CLASS_MASK; |
| } |
| private static final boolean getFlagFromProps(int props, int shift) { |
| return ((props>>shift)&1)!=0; |
| } |
| private static final int getMirrorDeltaFromProps(int props) { |
| return (short)props>>MIRROR_DELTA_SHIFT; |
| } |
| |
| private static final int ESC_MIRROR_DELTA=-4; |
| |
| // 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 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 MissingResourceException(e.getMessage(),DATA_FILE_NAME,""); |
| } |
| } |
| } |