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+/* MethodHelper.java - helper class for manipulating methods
+ Copyright (C) 2006 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, boolean isBridgeTarget)
+ {
+ 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(" ");
+ if (isBridgeTarget)
+ {
+ out.print("target$");
+ out.print(meth.name);
+ }
+ else
+ {
+ out.print(Keywords.getCxxName(meth.name));
+ }
+ }
+ 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(";");
+ }
+}