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Diffstat (limited to 'tools/gnu/classpath/tools/javah/MethodHelper.java')
-rw-r--r-- | tools/gnu/classpath/tools/javah/MethodHelper.java | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/tools/gnu/classpath/tools/javah/MethodHelper.java b/tools/gnu/classpath/tools/javah/MethodHelper.java new file mode 100644 index 000000000..6657f115a --- /dev/null +++ b/tools/gnu/classpath/tools/javah/MethodHelper.java @@ -0,0 +1,130 @@ +/* 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(";"); + } +} |