| /* MethodHelper.java - helper class for manipulating methods |
| Copyright (C) 2006, 2007 Free Software Foundation, Inc. |
| |
| This file is part of GNU Classpath. |
| |
| GNU Classpath is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2, or (at your option) |
| any later version. |
| |
| GNU Classpath 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 for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GNU Classpath; see the file COPYING. If not, write to the |
| Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 02110-1301 USA. |
| |
| Linking this library statically or dynamically with other modules is |
| making a combined work based on this library. Thus, the terms and |
| conditions of the GNU General Public License cover the whole |
| combination. |
| |
| As a special exception, the copyright holders of this library give you |
| permission to link this library with independent modules to produce an |
| executable, regardless of the license terms of these independent |
| modules, and to copy and distribute the resulting executable under |
| terms of your choice, provided that you also meet, for each linked |
| independent module, the terms and conditions of the license of that |
| module. An independent module is a module which is not derived from |
| or based on this library. If you modify this library, you may extend |
| this exception to your version of the library, but you are not |
| obligated to do so. If you do not wish to do so, delete this |
| exception statement from your version. */ |
| |
| |
| package gnu.classpath.tools.javah; |
| |
| import java.lang.reflect.Modifier; |
| import java.util.Iterator; |
| |
| import org.objectweb.asm.Opcodes; |
| import org.objectweb.asm.Type; |
| import org.objectweb.asm.tree.AbstractInsnNode; |
| import org.objectweb.asm.tree.MethodInsnNode; |
| import org.objectweb.asm.tree.MethodNode; |
| |
| public class MethodHelper |
| { |
| |
| public static boolean overrides(MethodNode derived, MethodNode base) |
| { |
| if (! derived.name.equals(base.name)) |
| return false; |
| if (! derived.desc.equals(base.desc)) |
| return false; |
| // FIXME: permission madness? |
| return true; |
| } |
| |
| public static String getBridgeTarget(MethodNode meth) |
| { |
| if ((meth.access & Opcodes.ACC_BRIDGE) == 0) |
| return null; |
| Iterator i = meth.instructions.iterator(); |
| while (i.hasNext()) |
| { |
| AbstractInsnNode insn = (AbstractInsnNode) i.next(); |
| if (! (insn instanceof MethodInsnNode)) |
| continue; |
| return ((MethodInsnNode) insn).desc; |
| } |
| return null; |
| } |
| |
| public static void print(CniPrintStream out, MethodNode meth, |
| ClassWrapper declarer, String realMethodName) |
| { |
| if ("<clinit>".equals(meth.name)) |
| return; |
| boolean isInit = "<init>".equals(meth.name); |
| out.setModifiers(meth.access); |
| out.print(" "); |
| if (Modifier.isStatic(meth.access)) |
| out.print("static "); |
| // If a class is final then we might as well skip 'virtual'. |
| // The reason here is that it is safe in this case for C++ |
| // ABI code to generate a direct call. The method does end |
| // up in the vtable (for BC code) but we don't care. Also, |
| // the class can't be derived from anyway. |
| else if (! isInit && ! Modifier.isPrivate(meth.access) |
| && ! Modifier.isFinal(declarer.access)) |
| out.print("virtual "); |
| if (! isInit) |
| { |
| out.print(Type.getReturnType(meth.desc)); |
| out.print(" "); |
| out.print(realMethodName); |
| } |
| else |
| { |
| String name = declarer.name; |
| int index = name.lastIndexOf('/'); |
| name = name.substring(index + 1); |
| out.print(name); |
| } |
| out.print("("); |
| Type[] argTypes = Type.getArgumentTypes(meth.desc); |
| for (int i = 0; i < argTypes.length; ++i) |
| { |
| if (i > 0) |
| out.print(", "); |
| out.print(argTypes[i]); |
| } |
| out.print(")"); |
| if (Modifier.isAbstract(meth.access)) |
| out.print(" = 0"); |
| out.println(";"); |
| } |
| } |