Mercurial > hg > truffle
view graal/com.oracle.max.criutils/src/com/oracle/max/criutils/JniMangle.java @ 5563:6a2671066204
added NewInstanceSnippets for lowering NewInstanceNodes (currently disabled by default)
added Word type and WordTypeRewriterPhase to support programming against machine word values in snippets without duplicating the code for 32 and 64 bit platforms
added GraphUtil.approxSourceLocation() utility method for getting an approximate source code location for a node
author | Doug Simon <doug.simon@oracle.com> |
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date | Mon, 11 Jun 2012 15:39:57 +0200 |
parents | b4c406861c33 |
children | 4d7175cf3526 |
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/* * Copyright (c) 2007, 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. * * 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.oracle.max.criutils; import com.oracle.graal.api.meta.*; /** * A utility for mangling Java method name and signatures into C function names. * * @see "http://java.sun.com/j2se/1.5.0/docs/guide/jni/spec/design.html#wp615" */ public final class JniMangle { private JniMangle() { } /** * Mangles a given string such that it can be represented as (part of) a valid C function name. */ private static String mangle(String name) { final StringBuilder mangledName = new StringBuilder(100); final int length = name.length(); for (int i = 0; i < length; i++) { final char ch = name.charAt(i); if (isAlphaNumeric(ch)) { mangledName.append(ch); } else if (ch == '_') { mangledName.append("_1"); } else if (ch == '.') { mangledName.append("_"); } else if (ch == ';') { mangledName.append("_2"); } else if (ch == '[') { mangledName.append("_3"); } else { mangledName.append(String.format("%04x", (int) ch)); } } return mangledName.toString(); } /** * The delimiter in the string returned by {@link #mangleMethod(TypeDescriptor, String, SignatureDescriptor, boolean)} separating * the short mangled form from the suffix to be added to obtain the long mangled form. */ public static final char LONG_NAME_DELIMITER = ' '; /** * Mangles a Java method to the symbol(s) to be used when binding it to a native function. * If {@code signature} is {@code null}, then a non-qualified symbol is returned. * Otherwise, a qualified symbol is returned. A qualified symbol has its non-qualified * prefix separated from its qualifying suffix by {@link #LONG_NAME_DELIMITER} if * {@code splitSuffix} is {@code true}. * * @param declaringClass a fully qualified class descriptor * @param name a Java method name (not checked here for validity) * @param signature if non-null, a method signature to include in the mangled name * @param splitSuffix determines if {@link #LONG_NAME_DELIMITER} should be used as described above * @return the symbol for the C function as described above */ public static String mangleMethod(ResolvedJavaType declaringClass, String name, Signature signature, boolean splitSuffix) { final StringBuilder result = new StringBuilder(100); final String declaringClassName = MetaUtil.toJavaName(declaringClass); result.append("Java_").append(mangle(declaringClassName)).append('_').append(mangle(name)); if (signature != null) { if (splitSuffix) { result.append(LONG_NAME_DELIMITER); } result.append("__"); final String sig = signature.asString(); final String parametersSignature = sig.substring(1, sig.lastIndexOf(')')).replace('/', '.').replace('$', '.'); result.append(mangle(parametersSignature)); } return result.toString(); } private static boolean isAlphaNumeric(char ch) { return (ch >= 'A' && ch <= 'Z') || (ch >= 'a' && ch <= 'z') || (ch >= '0' && ch <= '9'); } }