107 lines
3.8 KiB
Java
107 lines
3.8 KiB
Java
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/*
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* Copyright 2010 Sun Microsystems, Inc. All Rights Reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Sun designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Sun in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*/
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package java.lang;
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import java.io.DataInputStream;
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import java.io.InputStream;
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import java.lang.ref.SoftReference;
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import java.util.Arrays;
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import java.util.zip.InflaterInputStream;
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import java.security.AccessController;
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import java.security.PrivilegedAction;
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class CharacterName {
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private static SoftReference<byte[]> refStrPool;
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private static int[][] lookup;
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private static synchronized byte[] initNamePool() {
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byte[] strPool = null;
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if (refStrPool != null && (strPool = refStrPool.get()) != null)
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return strPool;
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DataInputStream dis = null;
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try {
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dis = new DataInputStream(new InflaterInputStream(
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AccessController.doPrivileged(new PrivilegedAction<InputStream>()
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{
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public InputStream run() {
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return getClass().getResourceAsStream("uniName.dat");
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}
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})));
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lookup = new int[(Character.MAX_CODE_POINT + 1) >> 8][];
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int total = dis.readInt();
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int cpEnd = dis.readInt();
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byte ba[] = new byte[cpEnd];
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dis.readFully(ba);
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int nameOff = 0;
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int cpOff = 0;
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int cp = 0;
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do {
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int len = ba[cpOff++] & 0xff;
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if (len == 0) {
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len = ba[cpOff++] & 0xff;
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// always big-endian
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cp = ((ba[cpOff++] & 0xff) << 16) |
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((ba[cpOff++] & 0xff) << 8) |
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((ba[cpOff++] & 0xff));
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} else {
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cp++;
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}
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int hi = cp >> 8;
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if (lookup[hi] == null) {
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lookup[hi] = new int[0x100];
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}
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lookup[hi][cp&0xff] = (nameOff << 8) | len;
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nameOff += len;
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} while (cpOff < cpEnd);
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strPool = new byte[total - cpEnd];
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dis.readFully(strPool);
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refStrPool = new SoftReference<byte[]>(strPool);
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} catch (Exception x) {
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throw new InternalError(x.getMessage());
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} finally {
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try {
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if (dis != null)
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dis.close();
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} catch (Exception xx) {}
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}
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return strPool;
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}
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public static String get(int cp) {
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byte[] strPool = null;
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if (refStrPool == null || (strPool = refStrPool.get()) == null)
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strPool = initNamePool();
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int off = 0;
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if (lookup[cp>>8] == null ||
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(off = lookup[cp>>8][cp&0xff]) == 0)
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return null;
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return new String(strPool, 0, off >>> 8, off & 0xff); // ASCII
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}
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}
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