Example usage for org.objectweb.asm Opcodes RETURN

Introduction

In this page you can find the example usage for org.objectweb.asm Opcodes RETURN.

Prototype

int RETURN

To view the source code for org.objectweb.asm Opcodes RETURN.

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Usage

From source file:uk.co.unclealex.executable.generator.jar.JarServiceImplTest.java

License:Apache License

protected byte[] generateClass(String className) {
    ClassWriter cw = new ClassWriter(0);
    MethodVisitor mv;/*from  ww w.  j  a  v a  2s.c  o m*/

    cw.visit(Opcodes.V1_7, Opcodes.ACC_PUBLIC + Opcodes.ACC_SUPER, className.replace('.', '/'), null,
            "java/lang/Object", null);

    mv = cw.visitMethod(Opcodes.ACC_PUBLIC, "<init>", "()V", null, null);
    mv.visitCode();
    mv.visitVarInsn(Opcodes.ALOAD, 0);
    mv.visitMethodInsn(Opcodes.INVOKESPECIAL, "java/lang/Object", "<init>", "()V");
    mv.visitInsn(Opcodes.RETURN);
    mv.visitMaxs(1, 1);
    mv.visitEnd();
    mv = cw.visitMethod(Opcodes.ACC_PUBLIC, "execute", "()Ljava/lang/String;", null, null);
    mv.visitCode();
    mv.visitLdcInsn(className);
    mv.visitInsn(Opcodes.ARETURN);
    mv.visitMaxs(1, 1);
    mv.visitEnd();
    cw.visitEnd();

    return cw.toByteArray();

}

From source file:vazkii.quark.base.asm.ClassTransformer.java

License:Creative Commons License

private static byte[] transformModelBiped(byte[] basicClass) {
    log("Transforming ModelBiped");
    MethodSignature sig = new MethodSignature("setRotationAngles", "func_78087_a", "a",
            "(FFFFFFLnet/minecraft/entity/Entity;)V");

    return transform(basicClass, Pair.of(sig, combine((AbstractInsnNode node) -> { // Filter
        return node.getOpcode() == Opcodes.RETURN;
    }, (MethodNode method, AbstractInsnNode node) -> { // Action
        InsnList newInstructions = new InsnList();

        newInstructions.add(new VarInsnNode(Opcodes.ALOAD, 7));
        newInstructions.add(new MethodInsnNode(Opcodes.INVOKESTATIC, ASM_HOOKS, "updateEmotes",
                "(Lnet/minecraft/entity/Entity;)V"));

        method.instructions.insertBefore(node, newInstructions);
        return true;
    })));//from  ww  w  . ja  v  a 2 s .c  o  m
}

From source file:vazkii.quark.base.asm.ClassTransformer.java

License:Creative Commons License

private static byte[] transformRender(byte[] basicClass) {
    log("Transforming Render");

    MethodSignature sig = new MethodSignature("renderEntityOnFire", "func_76977_a", "a",
            "(Lnet/minecraft/entity/Entity;DDDF)V");

    return transform(basicClass, Pair.of(sig, combine((AbstractInsnNode node) -> { // Filter
        return true;
    }, (MethodNode method, AbstractInsnNode node) -> { // Action
        InsnList newInstructions = new InsnList();

        newInstructions.add(new VarInsnNode(Opcodes.ALOAD, 1));
        newInstructions.add(new VarInsnNode(Opcodes.DLOAD, 2));
        newInstructions.add(new VarInsnNode(Opcodes.DLOAD, 4));
        newInstructions.add(new VarInsnNode(Opcodes.DLOAD, 6));
        newInstructions.add(new VarInsnNode(Opcodes.FLOAD, 8));
        newInstructions.add(new MethodInsnNode(Opcodes.INVOKESTATIC, ASM_HOOKS, "renderFire",
                "(Lnet/minecraft/entity/Entity;DDDF)Z"));
        LabelNode label = new LabelNode();
        newInstructions.add(new JumpInsnNode(Opcodes.IFEQ, label));
        newInstructions.add(new InsnNode(Opcodes.RETURN));
        newInstructions.add(label);//from  ww  w.j a  va2  s  . c  o  m

        method.instructions.insertBefore(node, newInstructions);
        return true;
    })));
}