| J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2001 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 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 || |
| 44 | (c >= 0x0080 && c <= 0x07FF)) { |
| 45 | res[utf8Idx++] = (byte) (0xC0 + (c >> 6)); |
| 46 | res[utf8Idx++] = (byte) (0x80 + (c & 0x3F)); |
| 47 | } else { |
| 48 | res[utf8Idx++] = (byte) (0xE0 + (c >> 12)); |
| 49 | res[utf8Idx++] = (byte) (0x80 + ((c >> 6) & 0x3F)); |
| 50 | res[utf8Idx++] = (byte) (0x80 + (c & 0x3F)); |
| 51 | } |
| 52 | } |
| 53 | } catch (ArrayIndexOutOfBoundsException e) { |
| 54 | throw new InternalError |
| 55 | ("Bug in sun.reflect bootstrap UTF-8 encoder"); |
| 56 | } |
| 57 | return res; |
| 58 | } |
| 59 | |
| 60 | private static int utf8Length(String str) { |
| 61 | int len = str.length(); |
| 62 | int utf8Len = 0; |
| 63 | for (int i = 0; i < len; i++) { |
| 64 | int c = str.charAt(i) & 0xFFFF; |
| 65 | if (c >= 0x0001 && c <= 0x007F) { |
| 66 | utf8Len += 1; |
| 67 | } else if (c == 0x0000 || |
| 68 | (c >= 0x0080 && c <= 0x07FF)) { |
| 69 | utf8Len += 2; |
| 70 | } else { |
| 71 | utf8Len += 3; |
| 72 | } |
| 73 | } |
| 74 | return utf8Len; |
| 75 | } |
| 76 | } |