jdk/src/java.base/share/classes/sun/text/normalizer/UBiDiProps.java - platform/libcore - Git at Google

 /*
  * 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,"");
         }
     }
 }
	/*
	* 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,"");
	}
	}
	}