| /* |
| * Copyright (c) 2002, 2012, 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 com.sun.tools.javah; |
| |
| import javax.lang.model.element.ExecutableElement; |
| import javax.lang.model.element.TypeElement; |
| import javax.lang.model.element.VariableElement; |
| import javax.lang.model.util.Elements; |
| import javax.lang.model.util.Types; |
| |
| /** |
| * A utility for mangling java identifiers into C names. Should make |
| * this more fine grained and distribute the functionality to the |
| * generators. |
| * |
| * <p><b>This is NOT part of any supported API. |
| * If you write code that depends on this, you do so at your own |
| * risk. This code and its internal interfaces are subject to change |
| * or deletion without notice.</b></p> |
| * |
| * @author Sucheta Dambalkar(Revised) |
| */ |
| public class Mangle { |
| |
| public static class Type { |
| public static final int CLASS = 1; |
| public static final int FIELDSTUB = 2; |
| public static final int FIELD = 3; |
| public static final int JNI = 4; |
| public static final int SIGNATURE = 5; |
| public static final int METHOD_JDK_1 = 6; |
| public static final int METHOD_JNI_SHORT = 7; |
| public static final int METHOD_JNI_LONG = 8; |
| } |
| |
| private Elements elems; |
| private Types types; |
| |
| Mangle(Elements elems, Types types) { |
| this.elems = elems; |
| this.types = types; |
| } |
| |
| public final String mangle(CharSequence name, int mtype) { |
| StringBuilder result = new StringBuilder(100); |
| int length = name.length(); |
| |
| for (int i = 0; i < length; i++) { |
| char ch = name.charAt(i); |
| if (isalnum(ch)) { |
| result.append(ch); |
| } else if ((ch == '.') && |
| mtype == Mangle.Type.CLASS) { |
| result.append('_'); |
| } else if (( ch == '$') && |
| mtype == Mangle.Type.CLASS) { |
| result.append('_'); |
| result.append('_'); |
| } else if (ch == '_' && mtype == Mangle.Type.FIELDSTUB) { |
| result.append('_'); |
| } else if (ch == '_' && mtype == Mangle.Type.CLASS) { |
| result.append('_'); |
| } else if (mtype == Mangle.Type.JNI) { |
| String esc = null; |
| if (ch == '_') |
| esc = "_1"; |
| else if (ch == '.') |
| esc = "_"; |
| else if (ch == ';') |
| esc = "_2"; |
| else if (ch == '[') |
| esc = "_3"; |
| if (esc != null) { |
| result.append(esc); |
| } else { |
| result.append(mangleChar(ch)); |
| } |
| } else if (mtype == Mangle.Type.SIGNATURE) { |
| if (isprint(ch)) { |
| result.append(ch); |
| } else { |
| result.append(mangleChar(ch)); |
| } |
| } else { |
| result.append(mangleChar(ch)); |
| } |
| } |
| |
| return result.toString(); |
| } |
| |
| public String mangleMethod(ExecutableElement method, TypeElement clazz, |
| int mtype) throws TypeSignature.SignatureException { |
| StringBuilder result = new StringBuilder(100); |
| result.append("Java_"); |
| |
| if (mtype == Mangle.Type.METHOD_JDK_1) { |
| result.append(mangle(clazz.getQualifiedName(), Mangle.Type.CLASS)); |
| result.append('_'); |
| result.append(mangle(method.getSimpleName(), |
| Mangle.Type.FIELD)); |
| result.append("_stub"); |
| return result.toString(); |
| } |
| |
| /* JNI */ |
| result.append(mangle(getInnerQualifiedName(clazz), Mangle.Type.JNI)); |
| result.append('_'); |
| result.append(mangle(method.getSimpleName(), |
| Mangle.Type.JNI)); |
| if (mtype == Mangle.Type.METHOD_JNI_LONG) { |
| result.append("__"); |
| String typesig = signature(method); |
| TypeSignature newTypeSig = new TypeSignature(elems); |
| String sig = newTypeSig.getTypeSignature(typesig, method.getReturnType()); |
| sig = sig.substring(1); |
| sig = sig.substring(0, sig.lastIndexOf(')')); |
| sig = sig.replace('/', '.'); |
| result.append(mangle(sig, Mangle.Type.JNI)); |
| } |
| |
| return result.toString(); |
| } |
| //where |
| private String getInnerQualifiedName(TypeElement clazz) { |
| return elems.getBinaryName(clazz).toString(); |
| } |
| |
| public final String mangleChar(char ch) { |
| String s = Integer.toHexString(ch); |
| int nzeros = 5 - s.length(); |
| char[] result = new char[6]; |
| result[0] = '_'; |
| for (int i = 1; i <= nzeros; i++) |
| result[i] = '0'; |
| for (int i = nzeros+1, j = 0; i < 6; i++, j++) |
| result[i] = s.charAt(j); |
| return new String(result); |
| } |
| |
| // Warning: duplicated in Gen |
| private String signature(ExecutableElement e) { |
| StringBuilder sb = new StringBuilder(); |
| String sep = "("; |
| for (VariableElement p: e.getParameters()) { |
| sb.append(sep); |
| sb.append(types.erasure(p.asType()).toString()); |
| sep = ","; |
| } |
| sb.append(")"); |
| return sb.toString(); |
| } |
| |
| /* Warning: Intentional ASCII operation. */ |
| private static boolean isalnum(char ch) { |
| return ch <= 0x7f && /* quick test */ |
| ((ch >= 'A' && ch <= 'Z') || |
| (ch >= 'a' && ch <= 'z') || |
| (ch >= '0' && ch <= '9')); |
| } |
| |
| /* Warning: Intentional ASCII operation. */ |
| private static boolean isprint(char ch) { |
| return ch >= 32 && ch <= 126; |
| } |
| } |