| /* |
| * Copyright (c) 2001, 2011, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package jdk.internal.reflect; |
| |
| /** It is necessary to use a "bootstrap" UTF-8 encoder for encoding |
| constant pool entries because the character set converters rely on |
| Class.newInstance(). */ |
| |
| class UTF8 { |
| // This encoder is not quite correct. It does not handle surrogate pairs. |
| static byte[] encode(String str) { |
| int len = str.length(); |
| byte[] res = new byte[utf8Length(str)]; |
| int utf8Idx = 0; |
| try { |
| for (int i = 0; i < len; i++) { |
| int c = str.charAt(i) & 0xFFFF; |
| if (c >= 0x0001 && c <= 0x007F) { |
| res[utf8Idx++] = (byte) c; |
| } else if (c == 0x0000 || |
| (c >= 0x0080 && c <= 0x07FF)) { |
| res[utf8Idx++] = (byte) (0xC0 + (c >> 6)); |
| res[utf8Idx++] = (byte) (0x80 + (c & 0x3F)); |
| } else { |
| res[utf8Idx++] = (byte) (0xE0 + (c >> 12)); |
| res[utf8Idx++] = (byte) (0x80 + ((c >> 6) & 0x3F)); |
| res[utf8Idx++] = (byte) (0x80 + (c & 0x3F)); |
| } |
| } |
| } catch (ArrayIndexOutOfBoundsException e) { |
| throw new InternalError |
| ("Bug in sun.reflect bootstrap UTF-8 encoder", e); |
| } |
| return res; |
| } |
| |
| private static int utf8Length(String str) { |
| int len = str.length(); |
| int utf8Len = 0; |
| for (int i = 0; i < len; i++) { |
| int c = str.charAt(i) & 0xFFFF; |
| if (c >= 0x0001 && c <= 0x007F) { |
| utf8Len += 1; |
| } else if (c == 0x0000 || |
| (c >= 0x0080 && c <= 0x07FF)) { |
| utf8Len += 2; |
| } else { |
| utf8Len += 3; |
| } |
| } |
| return utf8Len; |
| } |
| } |