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| 1 | /* | ||
| 2 | * Copyright (c) 2001, Oracle and/or its affiliates. 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. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * 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 | } | ||