Subversion Repositories openrisc

/***

 * ASM: a very small and fast Java bytecode manipulation framework

 * Copyright (c) 2000-2005 INRIA, France Telecom

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 * 3. Neither the name of the copyright holders nor the names of its

 *    contributors may be used to endorse or promote products derived from

 *    this software without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE

 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN

 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF

 * THE POSSIBILITY OF SUCH DAMAGE.

 */

package org.objectweb.asm.commons;

import org.objectweb.asm.ClassAdapter;

import org.objectweb.asm.ClassVisitor;

import org.objectweb.asm.MethodVisitor;

import org.objectweb.asm.Opcodes;

/**

 * A {@link ClassAdapter} that merges clinit methods into a single one.

 *

 * @author Eric Bruneton

 */

public class StaticInitMerger extends ClassAdapter {

    private String name;

    private MethodVisitor clinit;

    private String prefix;

    private int counter;

    public StaticInitMerger(final String prefix, final ClassVisitor cv) {

        super(cv);

        this.prefix = prefix;

    }

    public void visit(

        final int version,

        final int access,

        final String name,

        final String signature,

        final String superName,

        final String[] interfaces)

    {

        cv.visit(version, access, name, signature, superName, interfaces);

        this.name = name;

    }

    public MethodVisitor visitMethod(

        final int access,

        final String name,

        final String desc,

        final String signature,

        final String[] exceptions)

    {

        MethodVisitor mv;

        if (name.equals("<clinit>")) {

            int a = Opcodes.ACC_PRIVATE + Opcodes.ACC_STATIC;

            String n = prefix + counter++;

            mv = cv.visitMethod(a, n, desc, signature, exceptions);

            if (clinit == null) {

                clinit = cv.visitMethod(a, name, desc, null, null);

            }

            clinit.visitMethodInsn(Opcodes.INVOKESTATIC, this.name, n, desc);

        } else {

            mv = cv.visitMethod(access, name, desc, signature, exceptions);

        }

        return mv;

    }

    public void visitEnd() {

        if (clinit != null) {

            clinit.visitInsn(Opcodes.RETURN);

            clinit.visitMaxs(0, 0);

        }

        cv.visitEnd();

    }

}