/*
* Copyright (c) 2005, 2009, 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
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*/
/*
*******************************************************************************
* (C) Copyright IBM Corp. and others, 1996-2009 - All Rights Reserved *
* *
* The original version of this source code and documentation is copyrighted *
* and owned by IBM, These materials are provided under terms of a License *
* Agreement between IBM and Sun. This technology is protected by multiple *
* US and International patents. This notice and attribution to IBM may not *
* to removed. *
*******************************************************************************
*/
package sun.text.normalizer;
import java.io.DataInputStream;
import java.io.InputStream;
import java.io.IOException;
/**
* <p>Internal reader class for ICU data file uprops.icu containing
* Unicode codepoint data.</p>
* <p>This class simply reads uprops.icu, authenticates that it is a valid
* ICU data file and split its contents up into blocks of data for use in
* <a href=UCharacterProperty.html>com.ibm.icu.impl.UCharacterProperty</a>.
* </p>
* <p>uprops.icu which is in big-endian format is jared together with this
* package.</p>
*
* Unicode character properties file format see
* (ICU4C)/source/tools/genprops/store.c
*
* @author Syn Wee Quek
* @since release 2.1, February 1st 2002
*/
final class UCharacterPropertyReader implements ICUBinary.Authenticate
{
// public methods ----------------------------------------------------
public boolean isDataVersionAcceptable(byte version[])
{
return version[0] == DATA_FORMAT_VERSION_[0]
&& version[2] == DATA_FORMAT_VERSION_[2]
&& version[3] == DATA_FORMAT_VERSION_[3];
}
// protected constructor ---------------------------------------------
/**
* <p>Protected constructor.</p>
* @param inputStream ICU uprop.dat file input stream
* @exception IOException throw if data file fails authentication
*/
protected UCharacterPropertyReader(InputStream inputStream)
throws IOException
{
m_unicodeVersion_ = ICUBinary.readHeader(inputStream, DATA_FORMAT_ID_,
this);
m_dataInputStream_ = new DataInputStream(inputStream);
}
// protected methods -------------------------------------------------
/**
* <p>Reads uprops.icu, parse it into blocks of data to be stored in
* UCharacterProperty.</P
* @param ucharppty UCharacterProperty instance
* @exception IOException thrown when data reading fails
*/
protected void read(UCharacterProperty ucharppty) throws IOException
{
// read the indexes
int count = INDEX_SIZE_;
m_propertyOffset_ = m_dataInputStream_.readInt();
count --;
m_exceptionOffset_ = m_dataInputStream_.readInt();
count --;
m_caseOffset_ = m_dataInputStream_.readInt();
count --;
m_additionalOffset_ = m_dataInputStream_.readInt();
count --;
m_additionalVectorsOffset_ = m_dataInputStream_.readInt();
count --;
m_additionalColumnsCount_ = m_dataInputStream_.readInt();
count --;
m_reservedOffset_ = m_dataInputStream_.readInt();
count --;
m_dataInputStream_.skipBytes(3 << 2);
count -= 3;
ucharppty.m_maxBlockScriptValue_ = m_dataInputStream_.readInt();
count --; // 10
ucharppty.m_maxJTGValue_ = m_dataInputStream_.readInt();
count --; // 11
m_dataInputStream_.skipBytes(count << 2);
// read the trie index block
// m_props_index_ in terms of ints
ucharppty.m_trie_ = new CharTrie(m_dataInputStream_, null);
// skip the 32 bit properties block
int size = m_exceptionOffset_ - m_propertyOffset_;
m_dataInputStream_.skipBytes(size * 4);
// reads the 32 bit exceptions block
size = m_caseOffset_ - m_exceptionOffset_;
m_dataInputStream_.skipBytes(size * 4);
// reads the 32 bit case block
size = (m_additionalOffset_ - m_caseOffset_) << 1;
m_dataInputStream_.skipBytes(size * 2);
if(m_additionalColumnsCount_ > 0) {
// reads the additional property block
ucharppty.m_additionalTrie_ = new CharTrie(m_dataInputStream_, null);
// additional properties
size = m_reservedOffset_ - m_additionalVectorsOffset_;
ucharppty.m_additionalVectors_ = new int[size];
for (int i = 0; i < size; i ++) {
ucharppty.m_additionalVectors_[i] = m_dataInputStream_.readInt();
}
}
m_dataInputStream_.close();
ucharppty.m_additionalColumnsCount_ = m_additionalColumnsCount_;
ucharppty.m_unicodeVersion_ = VersionInfo.getInstance(
(int)m_unicodeVersion_[0], (int)m_unicodeVersion_[1],
(int)m_unicodeVersion_[2], (int)m_unicodeVersion_[3]);
}
// private variables -------------------------------------------------
/**
* Index size
*/
private static final int INDEX_SIZE_ = 16;
/**
* ICU data file input stream
*/
private DataInputStream m_dataInputStream_;
/**
* Offset information in the indexes.
*/
private int m_propertyOffset_;
private int m_exceptionOffset_;
private int m_caseOffset_;
private int m_additionalOffset_;
private int m_additionalVectorsOffset_;
private int m_additionalColumnsCount_;
private int m_reservedOffset_;
private byte m_unicodeVersion_[];
/**
* Data format "UPro".
*/
private static final byte DATA_FORMAT_ID_[] = {(byte)0x55, (byte)0x50,
(byte)0x72, (byte)0x6F};
/**
* Format version; this code works with all versions with the same major
* version number and the same Trie bit distribution.
*/
private static final byte DATA_FORMAT_VERSION_[] = {(byte)0x5, (byte)0,
(byte)Trie.INDEX_STAGE_1_SHIFT_,
(byte)Trie.INDEX_STAGE_2_SHIFT_};
}