Example usage for org.objectweb.asm.tree InsnList add

List of usage examples for org.objectweb.asm.tree InsnList add

  1. HOME
  2. Java
  3. org.objectweb.asm
  4. org.objectweb.asm.tree.*
  5. InsnList
  6. add

Introduction

In this page you can find the example usage for org.objectweb.asm.tree InsnList add.

Prototype

public void add(final InsnList insnList)

Source Link

Document

Adds the given instructions to the end of this list.

Usage

From source file:de.sanandrew.core.manpack.transformer.TransformEntityCollision.java

License:Creative Commons License

private static byte[] transformWorld(byte[] bytes) {
    ClassNode clazz = ASMHelper.createClassNode(bytes);
    MethodNode method = ASMHelper.findMethod(clazz, ASMNames.MD_WORLD_GET_COLLIDING_BB);

    InsnList needle = new InsnList();
    LabelNode ln = new LabelNode();
    needle.add(ln);
    needle.add(new LineNumberNode(-1, ln));
    needle.add(new VarInsnNode(Opcodes.ALOAD, 0));
    needle.add(new VarInsnNode(Opcodes.ALOAD, 1));
    needle.add(new VarInsnNode(Opcodes.ALOAD, 2));
    needle.add(new VarInsnNode(Opcodes.DLOAD, -1));
    needle.add(new VarInsnNode(Opcodes.DLOAD, -1));
    needle.add(new VarInsnNode(Opcodes.DLOAD, -1));
    needle.add(ASMHelper.getMethodInsnNode(Opcodes.INVOKEVIRTUAL, ASMNames.MD_AABB_EXPAND, false));
    needle.add(//from   w w  w  .j av  a2  s .com
            ASMHelper.getMethodInsnNode(Opcodes.INVOKEVIRTUAL, ASMNames.MD_WORLD_GET_ENTITIES_EXCLUDE, false));
    needle.add(new VarInsnNode(Opcodes.ASTORE, -1));

    VarInsnNode insertPoint = (VarInsnNode) ASMHelper.findLastNodeFromNeedle(method.instructions, needle);

    InsnList injectList = new InsnList();
    injectList.add(new LabelNode());
    injectList.add(ASMHelper.getFieldInsnNode(Opcodes.GETSTATIC, ASMNames.FD_SAPUTILS_EVENT_BUS));
    injectList.add(new TypeInsnNode(Opcodes.NEW, ASMNames.CL_COLLIDING_ENTITY_CHECK_EVENT));
    injectList.add(new InsnNode(Opcodes.DUP));
    injectList.add(new VarInsnNode(Opcodes.ALOAD, 0));
    injectList.add(new VarInsnNode(Opcodes.ALOAD, insertPoint.var));
    injectList.add(new VarInsnNode(Opcodes.ALOAD, 1));
    injectList.add(new VarInsnNode(Opcodes.ALOAD, 2));
    injectList.add(
            ASMHelper.getMethodInsnNode(Opcodes.INVOKESPECIAL, ASMNames.MD_SAP_COLLENTITYCHKEVT_INIT, false));
    injectList.add(ASMHelper.getMethodInsnNode(Opcodes.INVOKEVIRTUAL, ASMNames.MD_EVENT_BUS_POST, false));
    injectList.add(new InsnNode(Opcodes.POP));

    method.instructions.insert(insertPoint, injectList);

    // insert entity-sensitive bounding box method

    needle = new InsnList();
    ln = new LabelNode();
    needle.add(ln);
    needle.add(new LineNumberNode(-1, ln));
    needle.add(new VarInsnNode(Opcodes.ALOAD, 11));
    needle.add(new VarInsnNode(Opcodes.ILOAD, 12));
    needle.add(ASMHelper.getMethodInsnNode(Opcodes.INVOKEINTERFACE, ASMNames.MD_LIST_GET, true));
    needle.add(new TypeInsnNode(Opcodes.CHECKCAST, ASMNames.CL_ENTITY));
    needle.add(ASMHelper.getMethodInsnNode(Opcodes.INVOKEVIRTUAL, ASMNames.MD_ENTITY_GET_BOUNDING_BOX, false));
    needle.add(new VarInsnNode(Opcodes.ASTORE, -1));

    insertPoint = (VarInsnNode) ASMHelper.findLastNodeFromNeedle(method.instructions, needle);

    injectList = new InsnList();
    injectList.add(new LabelNode());
    injectList.add(new VarInsnNode(Opcodes.ALOAD, 11));
    injectList.add(new VarInsnNode(Opcodes.ILOAD, 12));
    injectList.add(ASMHelper.getMethodInsnNode(Opcodes.INVOKEINTERFACE, ASMNames.MD_LIST_GET, true));
    injectList.add(new TypeInsnNode(Opcodes.CHECKCAST, ASMNames.CL_ENTITY));
    injectList.add(new VarInsnNode(Opcodes.ALOAD, 1));
    injectList.add(new VarInsnNode(Opcodes.ALOAD, insertPoint.var));
    injectList.add(
            ASMHelper.getMethodInsnNode(Opcodes.INVOKEVIRTUAL, ASMNames.MD_SAP_ENTITY_GET_BOUNDING_BOX, false));
    injectList.add(new VarInsnNode(Opcodes.ASTORE, insertPoint.var));

    method.instructions.insert(insertPoint, injectList);

    bytes = ASMHelper.createBytes(clazz, /*ClassWriter.COMPUTE_FRAMES |*/ ClassWriter.COMPUTE_MAXS);

    return bytes;
}

From source file:de.sanandrew.core.manpack.transformer.TransformEntityThrowable.java

License:Creative Commons License

private static byte[] transformLqThrowable(byte[] bytes) {
    ClassNode classNode = ASMHelper.createClassNode(bytes);

    MethodNode method = ASMHelper.getMethodNode(Opcodes.ACC_PUBLIC, ASMNames.MD_SAP_CAN_IMPACT_ON_LIQUID);

    method.visitCode();//from w  ww  . jav  a2 s  .c  om
    Label label1 = new Label();
    method.visitLabel(label1);
    method.visitInsn(Opcodes.ICONST_0);
    method.visitInsn(Opcodes.IRETURN);
    Label label2 = new Label();
    method.visitLabel(label2);
    method.visitLocalVariable("this", ASMNames.CL_T_ENTITY_THROWABLE, null, label1, label2, 0);
    method.visitMaxs(0, 0);
    method.visitEnd();
    classNode.methods.add(method);

    method = ASMHelper.findMethod(classNode, ASMNames.MD_THROWABLE_ON_UPDATE);

    InsnList needle = new InsnList();
    needle.add(ASMHelper.getFieldInsnNode(Opcodes.GETFIELD, ASMNames.FD_THROWABLE_MOTION_Z));
    needle.add(new InsnNode(Opcodes.DADD));
    needle.add(ASMHelper.getMethodInsnNode(Opcodes.INVOKESTATIC, ASMNames.MD_VEC3_CREATE_VECTOR_HELPER, false));
    needle.add(new VarInsnNode(Opcodes.ASTORE, 2));
    needle.add(new LabelNode());
    needle.add(new LineNumberNode(-1, new LabelNode()));
    needle.add(new VarInsnNode(Opcodes.ALOAD, 0));
    needle.add(ASMHelper.getFieldInsnNode(Opcodes.GETFIELD, ASMNames.FD_THROWABLE_WORLD_OBJ));
    needle.add(new VarInsnNode(Opcodes.ALOAD, 1));
    needle.add(new VarInsnNode(Opcodes.ALOAD, 2));
    needle.add(ASMHelper.getMethodInsnNode(Opcodes.INVOKEVIRTUAL, ASMNames.MD_WORLD_RAY_TRACE_BLOCKS, false));
    needle.add(new VarInsnNode(Opcodes.ASTORE, -1));

    VarInsnNode insertPoint = (VarInsnNode) ASMHelper.findLastNodeFromNeedle(method.instructions, needle);

    InsnList injectList = new InsnList();
    injectList.add(new LabelNode());
    injectList.add(new VarInsnNode(Opcodes.ALOAD, 0));
    injectList.add(ASMHelper.getFieldInsnNode(Opcodes.GETFIELD, ASMNames.FD_THROWABLE_WORLD_OBJ));
    injectList.add(new VarInsnNode(Opcodes.ALOAD, 1));
    injectList.add(new VarInsnNode(Opcodes.ALOAD, 2));
    injectList.add(new VarInsnNode(Opcodes.ALOAD, 0));
    injectList.add(
            ASMHelper.getMethodInsnNode(Opcodes.INVOKEVIRTUAL, ASMNames.MD_SAP_CAN_IMPACT_ON_LIQUID, false));
    injectList.add(
            ASMHelper.getMethodInsnNode(Opcodes.INVOKEVIRTUAL, ASMNames.MD_WORLD_RAY_TRACE_BLOCKS_Z, false));
    injectList.add(new VarInsnNode(Opcodes.ASTORE, insertPoint.var));

    method.instructions.insert(insertPoint, injectList);

    return ASMHelper.createBytes(classNode, /*ClassWriter.COMPUTE_FRAMES |*/ ClassWriter.COMPUTE_MAXS);
}

From source file:de.sanandrew.core.manpack.transformer.TransformHorseArmor.java

License:Creative Commons License

private static void transformGetTotalArmorValue(MethodNode method) {
    InsnList needle = new InsnList();
    needle.add(new LabelNode());
    needle.add(new LineNumberNode(-1, new LabelNode()));
    needle.add(ASMHelper.getFieldInsnNode(Opcodes.GETSTATIC, ASMNames.FD_HORSE_ARMOR_VALUES));
    needle.add(new VarInsnNode(Opcodes.ALOAD, 0));
    needle.add(ASMHelper.getMethodInsnNode(Opcodes.INVOKEVIRTUAL, ASMNames.MD_HORSE_FUNC110241CB, false));

    AbstractInsnNode pointer = ASMHelper.findFirstNodeFromNeedle(method.instructions, needle);

    InsnList newInstr = new InsnList();

    newInstr.add(new LabelNode());
    newInstr.add(new VarInsnNode(Opcodes.ALOAD, 0));
    newInstr.add(//from w w w  .  j a  v a 2s  . co m
            ASMHelper.getMethodInsnNode(Opcodes.INVOKESPECIAL, ASMNames.MD_SAP_GET_CUSTOM_ARMOR_ITEM, false));
    newInstr.add(new VarInsnNode(Opcodes.ASTORE, 1));
    newInstr.add(new LabelNode());
    newInstr.add(new VarInsnNode(Opcodes.ALOAD, 1));
    newInstr.add(ASMHelper.getMethodInsnNode(Opcodes.INVOKEVIRTUAL, ASMNames.MD_ITEMSTACK_GET_ITEM, false));
    newInstr.add(new TypeInsnNode(Opcodes.INSTANCEOF, ASMNames.CL_ITEM_HORSE_ARMOR));
    LabelNode l2 = new LabelNode();
    newInstr.add(new JumpInsnNode(Opcodes.IFEQ, l2));
    newInstr.add(new LabelNode());
    newInstr.add(new VarInsnNode(Opcodes.ALOAD, 1));
    newInstr.add(ASMHelper.getMethodInsnNode(Opcodes.INVOKEVIRTUAL, ASMNames.MD_ITEMSTACK_GET_ITEM, false));
    newInstr.add(new TypeInsnNode(Opcodes.CHECKCAST, ASMNames.CL_ITEM_HORSE_ARMOR));
    newInstr.add(new VarInsnNode(Opcodes.ALOAD, 0));
    newInstr.add(new VarInsnNode(Opcodes.ALOAD, 1));
    newInstr.add(ASMHelper.getMethodInsnNode(Opcodes.INVOKEVIRTUAL, ASMNames.MD_SAP_GET_ARMOR_VALUE, false));
    newInstr.add(new InsnNode(Opcodes.IRETURN));
    newInstr.add(l2);

    method.instructions.insertBefore(pointer, newInstr);
}

From source file:de.sanandrew.core.manpack.transformer.TransformHorseArmor.java

License:Creative Commons License

private static void transformOnInvChanged(MethodNode method) {
    InsnList needle = new InsnList();
    needle.add(new VarInsnNode(Opcodes.ALOAD, 0));
    needle.add(ASMHelper.getMethodInsnNode(Opcodes.INVOKEVIRTUAL, ASMNames.MD_HORSE_IS_SADDLED, false));
    needle.add(new VarInsnNode(Opcodes.ISTORE, 3));

    AbstractInsnNode pointer = ASMHelper.findLastNodeFromNeedle(method.instructions, needle);

    InsnList newInstr = new InsnList();
    newInstr.add(new LabelNode());
    newInstr.add(new VarInsnNode(Opcodes.ALOAD, 0));
    newInstr.add(// w w  w.  j  a  va  2s  . c  o m
            ASMHelper.getMethodInsnNode(Opcodes.INVOKESPECIAL, ASMNames.MD_SAP_GET_CUSTOM_ARMOR_ITEM, false));
    newInstr.add(new VarInsnNode(Opcodes.ASTORE, 4));

    method.instructions.insert(pointer, newInstr);

    needle = new InsnList();
    needle.add(new LdcInsnNode("mob.horse.armor"));
    needle.add(new LdcInsnNode(0.5F));
    needle.add(new InsnNode(Opcodes.FCONST_1));
    needle.add(ASMHelper.getMethodInsnNode(Opcodes.INVOKEVIRTUAL, ASMNames.MD_HORSE_PLAY_SOUND, false));
    needle.add(new LabelNode());

    pointer = ASMHelper.findLastNodeFromNeedle(method.instructions, needle);

    newInstr = new InsnList();
    newInstr.add(new VarInsnNode(Opcodes.ALOAD, 4));
    newInstr.add(ASMHelper.getMethodInsnNode(Opcodes.INVOKEVIRTUAL, ASMNames.MD_ITEMSTACK_GET_ITEM, false));
    newInstr.add(ASMHelper.getFieldInsnNode(Opcodes.GETSTATIC, ASMNames.FD_ITEMS_IRON_SHOVEL));
    LabelNode l9 = new LabelNode();
    newInstr.add(new JumpInsnNode(Opcodes.IF_ACMPNE, l9));
    newInstr.add(new VarInsnNode(Opcodes.ALOAD, 4));
    newInstr.add(new VarInsnNode(Opcodes.ALOAD, 0));
    newInstr.add(
            ASMHelper.getMethodInsnNode(Opcodes.INVOKESPECIAL, ASMNames.MD_SAP_GET_CUSTOM_ARMOR_ITEM, false));
    newInstr.add(
            ASMHelper.getMethodInsnNode(Opcodes.INVOKEVIRTUAL, ASMNames.MD_ITEMSTACK_IS_ITEM_EQUAL, false));
    newInstr.add(new JumpInsnNode(Opcodes.IFNE, l9));
    newInstr.add(new LabelNode());
    newInstr.add(new VarInsnNode(Opcodes.ALOAD, 0));
    newInstr.add(new LdcInsnNode("mob.horse.armor"));
    newInstr.add(new LdcInsnNode(0.5F));
    newInstr.add(new InsnNode(Opcodes.FCONST_1));
    newInstr.add(ASMHelper.getMethodInsnNode(Opcodes.INVOKEVIRTUAL, ASMNames.MD_HORSE_PLAY_SOUND, false));
    newInstr.add(l9);

    method.instructions.insert(pointer, newInstr);
}

From source file:de.sanandrew.core.manpack.transformer.TransformHorseArmor.java

License:Creative Commons License

private static void transformArmorTexture(MethodNode method) {
    InsnList needle = new InsnList();
    needle.add(new VarInsnNode(Opcodes.ALOAD, 0));
    needle.add(ASMHelper.getMethodInsnNode(Opcodes.INVOKEVIRTUAL, ASMNames.MD_HORSE_FUNC110241CB, false));
    needle.add(new VarInsnNode(Opcodes.ISTORE, 3));

    AbstractInsnNode node = ASMHelper.findLastNodeFromNeedle(method.instructions, needle);

    InsnList newInstr = new InsnList();
    LabelNode l17 = new LabelNode();
    newInstr.add(l17);//from  ww  w.j a  v a2s . c  o m
    newInstr.add(new VarInsnNode(Opcodes.ALOAD, 0));
    newInstr.add(
            ASMHelper.getMethodInsnNode(Opcodes.INVOKESPECIAL, ASMNames.MD_SAP_GET_CUSTOM_ARMOR_ITEM, false));
    newInstr.add(new VarInsnNode(Opcodes.ASTORE, 4));
    LabelNode l18 = new LabelNode();
    newInstr.add(l18);
    newInstr.add(new VarInsnNode(Opcodes.ALOAD, 4));
    newInstr.add(ASMHelper.getMethodInsnNode(Opcodes.INVOKEVIRTUAL, ASMNames.MD_ITEMSTACK_GET_ITEM, false));
    newInstr.add(new TypeInsnNode(Opcodes.INSTANCEOF, ASMNames.CL_ITEM_HORSE_ARMOR));
    LabelNode l19 = new LabelNode();
    newInstr.add(new JumpInsnNode(Opcodes.IFEQ, l19));
    LabelNode l20 = new LabelNode();
    newInstr.add(l20);
    newInstr.add(new VarInsnNode(Opcodes.ALOAD, 0));
    newInstr.add(ASMHelper.getFieldInsnNode(Opcodes.GETFIELD, ASMNames.FD_HORSE_FIELD110280BR));
    newInstr.add(new InsnNode(Opcodes.ICONST_2));
    newInstr.add(new VarInsnNode(Opcodes.ALOAD, 4));
    newInstr.add(ASMHelper.getMethodInsnNode(Opcodes.INVOKEVIRTUAL, ASMNames.MD_ITEMSTACK_GET_ITEM, false));
    newInstr.add(new TypeInsnNode(Opcodes.CHECKCAST, ASMNames.CL_ITEM_HORSE_ARMOR));
    newInstr.add(new VarInsnNode(Opcodes.ALOAD, 0));
    newInstr.add(new VarInsnNode(Opcodes.ALOAD, 4));
    newInstr.add(ASMHelper.getMethodInsnNode(Opcodes.INVOKEVIRTUAL, ASMNames.MD_SAP_GET_ARMOR_TEXTURE, false));
    newInstr.add(new InsnNode(Opcodes.AASTORE));
    LabelNode l21 = new LabelNode();
    newInstr.add(l21);
    newInstr.add(new VarInsnNode(Opcodes.ALOAD, 0));
    newInstr.add(new TypeInsnNode(Opcodes.NEW, ASMNames.CL_STRING_BUILDER));
    newInstr.add(new InsnNode(Opcodes.DUP));
    newInstr.add(new VarInsnNode(Opcodes.ALOAD, 0));
    newInstr.add(ASMHelper.getFieldInsnNode(Opcodes.GETFIELD, ASMNames.FD_HORSE_FIELD110286BQ));
    newInstr.add(ASMHelper.getMethodInsnNode(Opcodes.INVOKESTATIC, ASMNames.MD_STRING_VALUE_OF, false));
    newInstr.add(ASMHelper.getMethodInsnNode(Opcodes.INVOKESPECIAL, ASMNames.MD_STRINGBUILDER_INIT, false));
    newInstr.add(new LdcInsnNode("cst-"));
    newInstr.add(ASMHelper.getMethodInsnNode(Opcodes.INVOKEVIRTUAL, ASMNames.MD_STRINGBUILDER_APPEND, false));
    newInstr.add(new VarInsnNode(Opcodes.ALOAD, 4));
    newInstr.add(
            ASMHelper.getMethodInsnNode(Opcodes.INVOKEVIRTUAL, ASMNames.MD_ITEMSTACK_GET_UNLOC_NAME, false));
    newInstr.add(ASMHelper.getMethodInsnNode(Opcodes.INVOKEVIRTUAL, ASMNames.MD_STRINGBUILDER_APPEND, false));
    newInstr.add(
            ASMHelper.getMethodInsnNode(Opcodes.INVOKEVIRTUAL, ASMNames.MD_STRINGBUILDER_TO_STRING, false));
    newInstr.add(ASMHelper.getFieldInsnNode(Opcodes.PUTFIELD, ASMNames.FD_HORSE_FIELD110286BQ));
    newInstr.add(new InsnNode(Opcodes.RETURN));
    newInstr.add(l19);

    method.instructions.insert(node, newInstr);
}

From source file:de.sanandrew.core.manpack.transformer.TransformHorseArmor.java

License:Creative Commons License

private static void transformUpdateHorseSlots(MethodNode method) {
    InsnList needle = new InsnList();
    needle.add(new VarInsnNode(Opcodes.ALOAD, 0));
    needle.add(new VarInsnNode(Opcodes.ALOAD, 0));
    needle.add(ASMHelper.getFieldInsnNode(Opcodes.GETFIELD, ASMNames.FD_HORSE_CHEST));
    needle.add(new InsnNode(Opcodes.ICONST_1));

    AbstractInsnNode pointer = ASMHelper.findFirstNodeFromNeedle(method.instructions, needle);

    InsnList newInstr = new InsnList();
    newInstr.add(new VarInsnNode(Opcodes.ALOAD, 0));
    newInstr.add(new VarInsnNode(Opcodes.ALOAD, 0));
    newInstr.add(ASMHelper.getFieldInsnNode(Opcodes.GETFIELD, ASMNames.FD_HORSE_CHEST));
    newInstr.add(new InsnNode(Opcodes.ICONST_1));
    newInstr.add(ASMHelper.getMethodInsnNode(Opcodes.INVOKEVIRTUAL, ASMNames.MD_ANIMALCHEST_GET_STACK_IN_SLOT,
            false));//from ww  w  .j a v a  2 s .c om
    newInstr.add(
            ASMHelper.getMethodInsnNode(Opcodes.INVOKESPECIAL, ASMNames.MD_SAP_SET_CUSTOM_ARMOR_ITEM, false));
    newInstr.add(new LabelNode());

    method.instructions.insertBefore(pointer, newInstr);
}

From source file:de.sanandrew.core.manpack.transformer.TransformHorseArmor.java

License:Creative Commons License

private static void transformEntityInit(MethodNode method) {
    InsnList needle = new InsnList();
    needle.add(new VarInsnNode(Opcodes.ALOAD, 0));
    needle.add(ASMHelper.getFieldInsnNode(Opcodes.GETFIELD, ASMNames.FD_HORSE_DATAWATCHER));
    needle.add(new IntInsnNode(Opcodes.BIPUSH, 22));
    needle.add(new InsnNode(Opcodes.ICONST_0));
    needle.add(ASMHelper.getMethodInsnNode(Opcodes.INVOKESTATIC, ASMNames.MD_INTEGER_VALUE_OF, false));
    needle.add(ASMHelper.getMethodInsnNode(Opcodes.INVOKEVIRTUAL, ASMNames.MD_DATAWATCHER_ADD_OBJECT, false));

    AbstractInsnNode pointer = ASMHelper.findLastNodeFromNeedle(method.instructions, needle);

    InsnList newInstr = new InsnList();
    newInstr.add(new LabelNode());
    newInstr.add(new VarInsnNode(Opcodes.ALOAD, 0));
    newInstr.add(ASMHelper.getFieldInsnNode(Opcodes.GETFIELD, ASMNames.FD_HORSE_DATAWATCHER));
    newInstr.add(new IntInsnNode(Opcodes.BIPUSH, 23));
    newInstr.add(new TypeInsnNode(Opcodes.NEW, ASMNames.CL_ITEM_STACK));
    newInstr.add(new InsnNode(Opcodes.DUP));
    newInstr.add(ASMHelper.getFieldInsnNode(Opcodes.GETSTATIC, ASMNames.FD_ITEMS_IRON_SHOVEL));
    newInstr.add(new InsnNode(Opcodes.ICONST_0));
    newInstr.add(ASMHelper.getMethodInsnNode(Opcodes.INVOKESPECIAL, ASMNames.MD_ITEMSTACK_INIT, false));
    newInstr.add(ASMHelper.getMethodInsnNode(Opcodes.INVOKEVIRTUAL, ASMNames.MD_DATAWATCHER_ADD_OBJECT, false));

    method.instructions.insert(pointer, newInstr);
}

From source file:de.sanandrew.core.manpack.transformer.TransformHorseArmor.java

License:Creative Commons License

private static void transformIsValidArmor(MethodNode method) {
    InsnList needle = new InsnList();
    needle.add(new LabelNode());
    needle.add(new LineNumberNode(-1, new LabelNode()));
    needle.add(new VarInsnNode(Opcodes.ALOAD, 0));
    needle.add(ASMHelper.getFieldInsnNode(Opcodes.GETSTATIC, ASMNames.FD_ITEMS_IRON_HORSE_ARMOR));
    needle.add(new JumpInsnNode(Opcodes.IF_ACMPEQ, new LabelNode()));

    AbstractInsnNode node = ASMHelper.findFirstNodeFromNeedle(method.instructions, needle);

    InsnList newInstr = new InsnList();
    newInstr.add(new LabelNode());
    newInstr.add(new VarInsnNode(Opcodes.ALOAD, 0));
    newInstr.add(new TypeInsnNode(Opcodes.INSTANCEOF, ASMNames.CL_ITEM_HORSE_ARMOR));
    LabelNode ln = new LabelNode();
    newInstr.add(new JumpInsnNode(Opcodes.IFEQ, ln));
    newInstr.add(new LabelNode());
    newInstr.add(new InsnNode(Opcodes.ICONST_1));
    newInstr.add(new InsnNode(Opcodes.IRETURN));
    newInstr.add(ln);//  w ww .j  ava  2 s  .c om

    method.instructions.insertBefore(node, newInstr);
}

From source file:de.sanandrew.core.manpack.transformer.TransformHorseArmor.java

License:Creative Commons License

private static void transformInteract(MethodNode method) {

    InsnList needle = new InsnList();
    needle.add(ASMHelper.getFieldInsnNode(Opcodes.GETSTATIC, ASMNames.FD_ITEMS_DIAMOND_HORSE_ARMOR));
    needle.add(new JumpInsnNode(Opcodes.IF_ACMPNE, new LabelNode()));
    needle.add(new LabelNode());
    needle.add(new LineNumberNode(-1, new LabelNode()));
    needle.add(new InsnNode(Opcodes.ICONST_3));
    needle.add(new VarInsnNode(Opcodes.ISTORE, 4));
    needle.add(new LabelNode());
    needle.add(new LineNumberNode(-1, new LabelNode()));
    needle.add(new FrameNode(Opcodes.F_SAME, 0, null, 0, null));

    AbstractInsnNode node = ASMHelper.findLastNodeFromNeedle(method.instructions, needle);

    InsnList newInstr = new InsnList();
    newInstr.add(new LabelNode());
    newInstr.add(new VarInsnNode(Opcodes.ALOAD, 2));
    newInstr.add(ASMHelper.getMethodInsnNode(Opcodes.INVOKEVIRTUAL, ASMNames.MD_ITEMSTACK_GET_ITEM, false));
    newInstr.add(new TypeInsnNode(Opcodes.INSTANCEOF, ASMNames.CL_ITEM_HORSE_ARMOR));
    LabelNode l8 = new LabelNode();
    newInstr.add(new JumpInsnNode(Opcodes.IFEQ, l8));
    newInstr.add(new LabelNode());
    newInstr.add(new InsnNode(Opcodes.ICONST_4));
    newInstr.add(new VarInsnNode(Opcodes.ISTORE, 4));
    newInstr.add(l8);/*from w  ww .ja va2  s .c  om*/
    newInstr.add(new FrameNode(Opcodes.F_SAME, 0, null, 0, null));

    method.instructions.insert(node, newInstr);
}

From source file:de.sanandrew.core.manpack.transformer.TransformPlayerDismountCtrl.java

License:Creative Commons License

/**
 * Transforms the EntityPlayer.class by hooking into the updateRidden method and adding a call to _SAP_canDismountOnInput
 * in order for the ridden entity to control whether or not the rider can dismount via sneaking.
 *
 * @param bytes     the class bytes to be transformed
 * @return the transformed class bytes//from   w  w w  .ja v a2  s.  c o m
 */
private static byte[] transformPlayer(byte[] bytes) {
    ClassNode clazz = ASMHelper.createClassNode(bytes);
    MethodNode method = ASMHelper.findMethod(clazz, ASMNames.MD_PLAYER_UPDATE_RIDDEN);

    InsnList needle = new InsnList();
    needle.add(new VarInsnNode(Opcodes.ALOAD, 0));
    needle.add(ASMHelper.getFieldInsnNode(Opcodes.GETFIELD, ASMNames.FD_PLAYER_WORLD_OBJ));
    needle.add(ASMHelper.getFieldInsnNode(Opcodes.GETFIELD, ASMNames.FD_WORLD_IS_REMOTE));
    LabelNode ln1 = new LabelNode();
    needle.add(new JumpInsnNode(Opcodes.IFNE, ln1));
    needle.add(new VarInsnNode(Opcodes.ALOAD, 0));
    needle.add(ASMHelper.getMethodInsnNode(Opcodes.INVOKEVIRTUAL, ASMNames.MD_PLAYER_IS_SNEAKING, false));
    needle.add(new JumpInsnNode(Opcodes.IFEQ, ln1));

    AbstractInsnNode insertPoint = ASMHelper.findLastNodeFromNeedle(method.instructions, needle);

    InsnList injectList = new InsnList();
    injectList.add(new VarInsnNode(Opcodes.ALOAD, 0));
    injectList.add(ASMHelper.getFieldInsnNode(Opcodes.GETFIELD, ASMNames.FD_PLAYER_RIDING_ENTITY));
    injectList.add(new VarInsnNode(Opcodes.ALOAD, 0));
    injectList.add(
            ASMHelper.getMethodInsnNode(Opcodes.INVOKEVIRTUAL, ASMNames.MD_SAP_CAN_DISMOUNT_ON_INPUT, false));
    injectList.add(new JumpInsnNode(Opcodes.IFEQ, ((JumpInsnNode) insertPoint).label));

    method.instructions.insert(insertPoint, injectList);

    bytes = ASMHelper.createBytes(clazz, /*ClassWriter.COMPUTE_FRAMES |*/ ClassWriter.COMPUTE_MAXS);

    return bytes;
}