/*
 * Copyright (c) 2014, 2022 Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code 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
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */
package com.sun.tdk.jcov.instrument.asm;

import com.sun.tdk.jcov.util.Utils;
import org.objectweb.asm.MethodVisitor;
import static org.objectweb.asm.Opcodes.*;

/**
 * This class could be used to insert invocation of
 * com.sun.tdk.jcov.runtime.Collect.saveResults() into method.
 *
 *
 * @author Dmitry Fazunenko
 * @author Alexey Fedorchenko
 */
public class SavePointsMethodAdapter extends MethodVisitor {

    private final boolean isBegin;

    public SavePointsMethodAdapter(final MethodVisitor mv, boolean isBegin) {
        super(ASMUtils.ASM_API_VERSION, mv);
        this.isBegin = isBegin;
    }

    @Override
    public void visitCode() {
        if (isBegin) {
            mv.visitMethodInsn(INVOKESTATIC, "com/sun/tdk/jcov/runtime/Collect", "saveResults", "()V", false);
        }
        super.visitCode();
    }

    @Override
    public void visitInsn(int opcode) {
        if (!isBegin) {
            switch (opcode) {
                case ATHROW:
                case RET:
                case IRETURN:
                case LRETURN:
                case FRETURN:
                case DRETURN:
                case ARETURN:
                case RETURN:
                    mv.visitMethodInsn(INVOKESTATIC, "com/sun/tdk/jcov/runtime/Collect", "saveResults", "()V", false);
                    break;
                default:
                    break;
            }
        }
        super.visitInsn(opcode);
    }
}
