5610
|
1 |
/*
|
|
2 |
* Copyright 2010 Sun Microsystems, Inc. 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. Sun designates this
|
|
8 |
* particular file as subject to the "Classpath" exception as provided
|
|
9 |
* by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
|
|
22 |
* CA 95054 USA or visit www.sun.com if you need additional information or
|
|
23 |
* have any questions.
|
|
24 |
*/
|
|
25 |
|
|
26 |
package java.lang;
|
|
27 |
|
|
28 |
import java.io.DataInputStream;
|
|
29 |
import java.io.InputStream;
|
|
30 |
import java.lang.ref.SoftReference;
|
|
31 |
import java.util.Arrays;
|
|
32 |
import java.util.zip.InflaterInputStream;
|
|
33 |
import java.security.AccessController;
|
|
34 |
import java.security.PrivilegedAction;
|
|
35 |
|
|
36 |
class CharacterName {
|
|
37 |
|
|
38 |
private static SoftReference<byte[]> refStrPool;
|
|
39 |
private static int[][] lookup;
|
|
40 |
|
|
41 |
private static synchronized byte[] initNamePool() {
|
|
42 |
byte[] strPool = null;
|
|
43 |
if (refStrPool != null && (strPool = refStrPool.get()) != null)
|
|
44 |
return strPool;
|
|
45 |
DataInputStream dis = null;
|
|
46 |
try {
|
|
47 |
dis = new DataInputStream(new InflaterInputStream(
|
|
48 |
AccessController.doPrivileged(new PrivilegedAction<InputStream>()
|
|
49 |
{
|
|
50 |
public InputStream run() {
|
|
51 |
return getClass().getResourceAsStream("uniName.dat");
|
|
52 |
}
|
|
53 |
})));
|
|
54 |
|
|
55 |
lookup = new int[(Character.MAX_CODE_POINT + 1) >> 8][];
|
|
56 |
int total = dis.readInt();
|
|
57 |
int cpEnd = dis.readInt();
|
|
58 |
byte ba[] = new byte[cpEnd];
|
|
59 |
dis.readFully(ba);
|
|
60 |
|
|
61 |
int nameOff = 0;
|
|
62 |
int cpOff = 0;
|
|
63 |
int cp = 0;
|
|
64 |
do {
|
|
65 |
int len = ba[cpOff++] & 0xff;
|
|
66 |
if (len == 0) {
|
|
67 |
len = ba[cpOff++] & 0xff;
|
|
68 |
// always big-endian
|
|
69 |
cp = ((ba[cpOff++] & 0xff) << 16) |
|
|
70 |
((ba[cpOff++] & 0xff) << 8) |
|
|
71 |
((ba[cpOff++] & 0xff));
|
|
72 |
} else {
|
|
73 |
cp++;
|
|
74 |
}
|
|
75 |
int hi = cp >> 8;
|
|
76 |
if (lookup[hi] == null) {
|
|
77 |
lookup[hi] = new int[0x100];
|
|
78 |
}
|
|
79 |
lookup[hi][cp&0xff] = (nameOff << 8) | len;
|
|
80 |
nameOff += len;
|
|
81 |
} while (cpOff < cpEnd);
|
|
82 |
strPool = new byte[total - cpEnd];
|
|
83 |
dis.readFully(strPool);
|
|
84 |
refStrPool = new SoftReference<byte[]>(strPool);
|
|
85 |
} catch (Exception x) {
|
|
86 |
throw new InternalError(x.getMessage());
|
|
87 |
} finally {
|
|
88 |
try {
|
|
89 |
if (dis != null)
|
|
90 |
dis.close();
|
|
91 |
} catch (Exception xx) {}
|
|
92 |
}
|
|
93 |
return strPool;
|
|
94 |
}
|
|
95 |
|
|
96 |
public static String get(int cp) {
|
|
97 |
byte[] strPool = null;
|
|
98 |
if (refStrPool == null || (strPool = refStrPool.get()) == null)
|
|
99 |
strPool = initNamePool();
|
|
100 |
int off = 0;
|
|
101 |
if (lookup[cp>>8] == null ||
|
|
102 |
(off = lookup[cp>>8][cp&0xff]) == 0)
|
|
103 |
return null;
|
|
104 |
return new String(strPool, 0, off >>> 8, off & 0xff); // ASCII
|
|
105 |
}
|
|
106 |
}
|