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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 | +} | |