/***** BEGIN LICENSE BLOCK *****
* Version: CPL 1.0/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Common Public
* License Version 1.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.eclipse.org/legal/cpl-v10.html
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* Copyright (C) 2009 Charles O Nutter <headius@headius.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the CPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the CPL, the GPL or the LGPL.
***** END LICENSE BLOCK *****/
package org.jruby.compiler.util;
import java.lang.reflect.Method;
import org.jruby.BasicObjectStub;
import org.jruby.compiler.impl.SkinnyMethodAdapter;
import org.objectweb.asm.ClassVisitor;
import org.objectweb.asm.Opcodes;
import static org.jruby.util.CodegenUtils.*;
public class BasicObjectStubGenerator {
private static final Method[] BASIC_OBJECT_STUB_METHODS = BasicObjectStub.class.getDeclaredMethods();
public static void addBasicObjectStubsToClass(ClassVisitor cv) {
for (Method stub : BASIC_OBJECT_STUB_METHODS) {
if (stub.getName().equals("getRuntime") ||
stub.getName().equals("getMetaClass")) {
// skip these and implement appropriately for the specific case
continue;
}
// trim off IRubyObject self argument
Class[] signature = new Class[stub.getParameterTypes().length - 1];
for (int i = 0; i < signature.length; i++) {
signature[i] = stub.getParameterTypes()[i + 1];
}
SkinnyMethodAdapter method = new SkinnyMethodAdapter(
cv, Opcodes.ACC_PUBLIC | Opcodes.ACC_BRIDGE, stub.getName(), sig(stub.getReturnType(), signature), null, null);
method.start();
// load self
method.aload(0);
// load arguments
int nextIndex = 1;
for (Class argType : signature) {
if (argType.isPrimitive()) {
if (argType == boolean.class ||
argType == byte.class ||
argType == char.class ||
argType == short.class ||
argType == int.class) {
method.iload(nextIndex);
nextIndex++;
} else if (argType == long.class) {
method.lload(nextIndex);
nextIndex += 2;
} else if (argType == float.class) {
method.fload(nextIndex);
nextIndex++;
} else if (argType == double.class) {
method.dload(nextIndex);
nextIndex += 2;
} else {
throw new RuntimeException("unknown primitive type: " + argType);
}
} else {
method.aload(nextIndex);
nextIndex++;
}
}
// invoke stub
method.invokestatic(p(BasicObjectStub.class), stub.getName(), sig(stub.getReturnType(), stub.getParameterTypes()));
Class retType = stub.getReturnType();
if (retType == void.class) {
method.voidreturn();
} else {
if (retType.isPrimitive()) {
if (retType == boolean.class ||
retType == byte.class ||
retType == char.class ||
retType == short.class ||
retType == int.class) {
method.ireturn();
} else if (retType == long.class) {
method.lreturn();
} else if (retType == float.class) {
method.freturn();
} else if (retType == double.class) {
method.dreturn();
} else {
throw new RuntimeException("unknown primitive type: " + retType);
}
} else {
method.areturn();
}
}
method.end();
}
}
}