--- a/nashorn/src/jdk.scripting.nashorn/share/classes/jdk/internal/dynalink/support/NameCodec.java Thu Nov 05 13:42:20 2015 -0800
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,207 +0,0 @@
-/*
- * Copyright (c) 2010, 2013, 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.
- */
-
-/*
- * This file is available under and governed by the GNU General Public
- * License version 2 only, as published by the Free Software Foundation.
- * However, the following notice accompanied the original version of this
- * file, and Oracle licenses the original version of this file under the BSD
- * license:
- */
-/*
- Copyright 2009-2013 Attila Szegedi
-
- Licensed under both the Apache License, Version 2.0 (the "Apache License")
- and the BSD License (the "BSD License"), with licensee being free to
- choose either of the two at their discretion.
-
- You may not use this file except in compliance with either the Apache
- License or the BSD License.
-
- If you choose to use this file in compliance with the Apache License, the
- following notice applies to you:
-
- You may obtain a copy of the Apache License at
-
- http://www.apache.org/licenses/LICENSE-2.0
-
- Unless required by applicable law or agreed to in writing, software
- distributed under the License is distributed on an "AS IS" BASIS,
- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
- implied. See the License for the specific language governing
- permissions and limitations under the License.
-
- If you choose to use this file in compliance with the BSD License, the
- following notice applies to you:
-
- Redistribution and use in source and binary forms, with or without
- modification, are permitted provided that the following conditions are
- met:
- * Redistributions of source code must retain the above copyright
- notice, this list of conditions and the following disclaimer.
- * Redistributions in binary form must reproduce the above copyright
- notice, this list of conditions and the following disclaimer in the
- documentation and/or other materials provided with the distribution.
- * Neither the name of the copyright holder nor the names of
- contributors may be used to endorse or promote products derived from
- this software without specific prior written permission.
-
- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
- IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
- TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
- PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDER
- BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
- BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
- WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
- OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
- ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-*/
-
-package jdk.internal.dynalink.support;
-
-
-/**
- * Implements the name mangling and demangling as specified by John Rose's
- * <a href="https://blogs.oracle.com/jrose/entry/symbolic_freedom_in_the_vm"
- * target="_blank">"Symbolic Freedom in the VM"</a> article. Normally, you would
- * mangle the names in the call sites as you're generating bytecode, and then
- * demangle them when you receive them in bootstrap methods.
- */
-public final class NameCodec {
- private static final char ESCAPE_CHAR = '\\';
- private static final char EMPTY_ESCAPE = '=';
- private static final String EMPTY_NAME = new String(new char[] { ESCAPE_CHAR, EMPTY_ESCAPE });
- private static final char EMPTY_CHAR = 0xFEFF;
-
- private static final int MIN_ENCODING = '$';
- private static final int MAX_ENCODING = ']';
- private static final char[] ENCODING = new char[MAX_ENCODING - MIN_ENCODING + 1];
- private static final int MIN_DECODING = '!';
- private static final int MAX_DECODING = '}';
- private static final char[] DECODING = new char[MAX_DECODING - MIN_DECODING + 1];
-
- static {
- addEncoding('/', '|');
- addEncoding('.', ',');
- addEncoding(';', '?');
- addEncoding('$', '%');
- addEncoding('<', '^');
- addEncoding('>', '_');
- addEncoding('[', '{');
- addEncoding(']', '}');
- addEncoding(':', '!');
- addEncoding('\\', '-');
- DECODING[EMPTY_ESCAPE - MIN_DECODING] = EMPTY_CHAR;
- }
-
- private NameCodec() {
- }
-
- /**
- * Encodes ("mangles") an unencoded symbolic name.
- * @param name the symbolic name to mangle
- * @return the mangled form of the symbolic name.
- */
- public static String encode(final String name) {
- final int l = name.length();
- if(l == 0) {
- return EMPTY_NAME;
- }
- StringBuilder b = null;
- int lastEscape = -1;
- for(int i = 0; i < l; ++i) {
- final int encodeIndex = name.charAt(i) - MIN_ENCODING;
- if(encodeIndex >= 0 && encodeIndex < ENCODING.length) {
- final char e = ENCODING[encodeIndex];
- if(e != 0) {
- if(b == null) {
- b = new StringBuilder(name.length() + 3);
- if(name.charAt(0) != ESCAPE_CHAR && i > 0) {
- b.append(EMPTY_NAME);
- }
- b.append(name, 0, i);
- } else {
- b.append(name, lastEscape + 1, i);
- }
- b.append(ESCAPE_CHAR).append(e);
- lastEscape = i;
- }
- }
- }
- if(b == null) {
- return name;
- }
- assert lastEscape != -1;
- b.append(name, lastEscape + 1, l);
- return b.toString();
- }
-
- /**
- * Decodes ("demangles") an encoded symbolic name.
- * @param name the symbolic name to demangle
- * @return the demangled form of the symbolic name.
- */
- public static String decode(final String name) {
- if(name.isEmpty() || name.charAt(0) != ESCAPE_CHAR) {
- return name;
- }
- final int l = name.length();
- if(l == 2 && name.charAt(1) == EMPTY_CHAR) {
- return "";
- }
- final StringBuilder b = new StringBuilder(name.length());
- int lastEscape = -2;
- int lastBackslash = -1;
- for(;;) {
- final int nextBackslash = name.indexOf(ESCAPE_CHAR, lastBackslash + 1);
- if(nextBackslash == -1 || nextBackslash == l - 1) {
- break;
- }
- final int decodeIndex = name.charAt(nextBackslash + 1) - MIN_DECODING;
- if(decodeIndex >= 0 && decodeIndex < DECODING.length) {
- final char d = DECODING[decodeIndex];
- if(d == EMPTY_CHAR) {
- // "\=" is only valid at the beginning of a mangled string
- if(nextBackslash == 0) {
- lastEscape = 0;
- }
- } else if(d != 0) {
- b.append(name, lastEscape + 2, nextBackslash).append(d);
- lastEscape = nextBackslash;
- }
- }
- lastBackslash = nextBackslash;
- }
- b.append(name, lastEscape + 2, l);
- return b.toString();
- }
-
- private static void addEncoding(final char from, final char to) {
- ENCODING[from - MIN_ENCODING] = to;
- DECODING[to - MIN_DECODING] = from;
- }
-}