Groovy example source code file (BinaryLongExpressionHelper.java)

This example Groovy source code file (BinaryLongExpressionHelper.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Groovy tags/keywords

binarylongexpressionhelper, binarylongexpressionhelper, bitwise_and, bitwise_or, div, div, land, lcmp, lor, lrem, lsub, lushr, methodcaller, methodcaller

The Groovy BinaryLongExpressionHelper.java source code

/*
 * Copyright 2003-2010 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.codehaus.groovy.classgen.asm;

import static org.objectweb.asm.Opcodes.*;

import org.codehaus.groovy.ast.ClassHelper;
import org.codehaus.groovy.ast.ClassNode;
import org.codehaus.groovy.runtime.BytecodeInterface8;
import org.objectweb.asm.MethodVisitor;

/**
 * @author <a href="mailto:blackdrag@gmx.org">Jochen "blackdrag" Theodorou
 */
public class BinaryLongExpressionHelper extends BinaryExpressionWriter {

    public BinaryLongExpressionHelper(WriterController controller) {
        super(controller);
    }

    protected void doubleTwoOperands(MethodVisitor mv) {
        /*
            since there is no DUP4 we have to do this:
            DUP2_X1
            POP2
            DUP2_X1
            DUP2_X1
            POP2
            DUP2_X1          
         */
        mv.visitInsn(DUP2_X1);
        mv.visitInsn(POP2);
        mv.visitInsn(DUP2_X1);
        mv.visitInsn(DUP2_X1);
        mv.visitInsn(POP2);
        mv.visitInsn(DUP2_X1);
    }

    protected void removeTwoOperands(MethodVisitor mv) {
        mv.visitInsn(POP2);
        mv.visitInsn(POP2);
    }

    private static final MethodCaller 
        longArrayGet = MethodCaller.newStatic(BytecodeInterface8.class, "lArrayGet"),
        longArraySet = MethodCaller.newStatic(BytecodeInterface8.class, "lArraySet");

    protected MethodCaller getArrayGetCaller() {
        return longArrayGet;
    }

    protected MethodCaller getArraySetCaller() {
        return longArraySet;
    }
    
    private static final int[] bitOp = {
        LOR,            //  BITWISE_OR / PIPE   340
        LAND,           //  BITWISE_AND         341
        LXOR,           //  BIWISE_XOR          342
    };

    protected int getBitwiseOperationBytecode(int type) {
        return bitOp[type];
    }

    protected int getCompareCode() {
        return LCMP;
    }

    protected ClassNode getNormalOpResultType() {
        return ClassHelper.long_TYPE;
    }

    private static final int[] shiftOp = {
        LSHL,           // LEFT_SHIFT               280
        LSHR,           // RIGHT_SHIFT              281
        LUSHR           // RIGHT_SHIFT_UNSIGNED     282
    };
    
    protected int getShiftOperationBytecode(int type) {
        return shiftOp[type];
    }

    private static final int[] stdOperations = {
        LADD,           //  PLUS        200
        LSUB,           //  MINUS       201
        LMUL,           //  MULTIPLY    202
        0,              //  DIV, (203) but we don't want that one
        LDIV,           //  INTDIV      204
        LREM,           //  MOD         203
    };
    
    protected int getStandardOperationBytecode(int type) {
        return stdOperations[type];
    }

    protected void writeMinusMinus(MethodVisitor mv) {
        mv.visitInsn(LCONST_1);
        mv.visitInsn(LSUB);
    }

    protected void writePlusPlus(MethodVisitor mv) {
        mv.visitInsn(LCONST_1);
        mv.visitInsn(LADD);
    }
}