01: /*
02: * Copyright 2001 Sun Microsystems, Inc. All Rights Reserved.
03: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
04: *
05: * This code is free software; you can redistribute it and/or modify it
06: * under the terms of the GNU General Public License version 2 only, as
07: * published by the Free Software Foundation. Sun designates this
08: * particular file as subject to the "Classpath" exception as provided
09: * 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 sun.reflect;
27:
28: /** It is necessary to use a "bootstrap" UTF-8 encoder for encoding
29: constant pool entries because the character set converters rely on
30: Class.newInstance(). */
31:
32: class UTF8 {
33: // This encoder is not quite correct. It does not handle surrogate pairs.
34: static byte[] encode(String str) {
35: int len = str.length();
36: byte[] res = new byte[utf8Length(str)];
37: int utf8Idx = 0;
38: try {
39: for (int i = 0; i < len; i++) {
40: int c = str.charAt(i) & 0xFFFF;
41: if (c >= 0x0001 && c <= 0x007F) {
42: res[utf8Idx++] = (byte) c;
43: } else if (c == 0x0000 || (c >= 0x0080 && c <= 0x07FF)) {
44: res[utf8Idx++] = (byte) (0xC0 + (c >> 6));
45: res[utf8Idx++] = (byte) (0x80 + (c & 0x3F));
46: } else {
47: res[utf8Idx++] = (byte) (0xE0 + (c >> 12));
48: res[utf8Idx++] = (byte) (0x80 + ((c >> 6) & 0x3F));
49: res[utf8Idx++] = (byte) (0x80 + (c & 0x3F));
50: }
51: }
52: } catch (ArrayIndexOutOfBoundsException e) {
53: throw new InternalError(
54: "Bug in sun.reflect bootstrap UTF-8 encoder");
55: }
56: return res;
57: }
58:
59: private static int utf8Length(String str) {
60: int len = str.length();
61: int utf8Len = 0;
62: for (int i = 0; i < len; i++) {
63: int c = str.charAt(i) & 0xFFFF;
64: if (c >= 0x0001 && c <= 0x007F) {
65: utf8Len += 1;
66: } else if (c == 0x0000 || (c >= 0x0080 && c <= 0x07FF)) {
67: utf8Len += 2;
68: } else {
69: utf8Len += 3;
70: }
71: }
72: return utf8Len;
73: }
74: }
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