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.util;

import org.objectweb.asm.AnnotationVisitor;

import org.objectweb.asm.MethodVisitor;

import org.objectweb.asm.Label;

import org.objectweb.asm.Opcodes;

import java.util.HashMap;

/**

 * A {@link MethodVisitor} that prints the ASM code that generates the methods

 * it visits.

 *

 * @author Eric Bruneton

 * @author Eugene Kuleshov

 */

public class ASMifierMethodVisitor extends ASMifierAbstractVisitor implements

        MethodVisitor

{

    /**

     * Constructs a new {@link ASMifierMethodVisitor} object.

     */

    public ASMifierMethodVisitor() {

        super("mv");

        this.labelNames = new HashMap();

    }

    public AnnotationVisitor visitAnnotationDefault() {

        buf.setLength(0);

        buf.append("{\n").append("av0 = mv.visitAnnotationDefault();\n");

        text.add(buf.toString());

        ASMifierAnnotationVisitor av = new ASMifierAnnotationVisitor(0);

        text.add(av.getText());

        text.add("}\n");

        return av;

    }

    public AnnotationVisitor visitParameterAnnotation(

        final int parameter,

        final String desc,

        final boolean visible)

    {

        buf.setLength(0);

        buf.append("{\n")

                .append("av0 = mv.visitParameterAnnotation(")

                .append(parameter)

                .append(", ");

        appendConstant(desc);

        buf.append(", ").append(visible).append(");\n");

        text.add(buf.toString());

        ASMifierAnnotationVisitor av = new ASMifierAnnotationVisitor(0);

        text.add(av.getText());

        text.add("}\n");

        return av;

    }

    public void visitCode() {

        text.add("mv.visitCode();\n");

    }

    public void visitInsn(final int opcode) {

        buf.setLength(0);

        buf.append("mv.visitInsn(").append(OPCODES[opcode]).append(");\n");

        text.add(buf.toString());

    }

    public void visitIntInsn(final int opcode, final int operand) {

        buf.setLength(0);

        buf.append("mv.visitIntInsn(")

                .append(OPCODES[opcode])

                .append(", ")

                .append(opcode == Opcodes.NEWARRAY

                        ? TYPES[operand]

                        : Integer.toString(operand))

                .append(");\n");

        text.add(buf.toString());

    }

    public void visitVarInsn(final int opcode, final int var) {

        buf.setLength(0);

        buf.append("mv.visitVarInsn(")

                .append(OPCODES[opcode])

                .append(", ")

                .append(var)

                .append(");\n");

        text.add(buf.toString());

    }

    public void visitTypeInsn(final int opcode, final String desc) {

        buf.setLength(0);

        buf.append("mv.visitTypeInsn(").append(OPCODES[opcode]).append(", ");

        appendConstant(desc);

        buf.append(");\n");

        text.add(buf.toString());

    }

    public void visitFieldInsn(

        final int opcode,

        final String owner,

        final String name,

        final String desc)

    {

        buf.setLength(0);

        buf.append("mv.visitFieldInsn(").append(OPCODES[opcode]).append(", ");

        appendConstant(owner);

        buf.append(", ");

        appendConstant(name);

        buf.append(", ");

        appendConstant(desc);

        buf.append(");\n");

        text.add(buf.toString());

    }

    public void visitMethodInsn(

        final int opcode,

        final String owner,

        final String name,

        final String desc)

    {

        buf.setLength(0);

        buf.append("mv.visitMethodInsn(").append(OPCODES[opcode]).append(", ");

        appendConstant(owner);

        buf.append(", ");

        appendConstant(name);

        buf.append(", ");

        appendConstant(desc);

        buf.append(");\n");

        text.add(buf.toString());

    }

    public void visitJumpInsn(final int opcode, final Label label) {

        buf.setLength(0);

        declareLabel(label);

        buf.append("mv.visitJumpInsn(").append(OPCODES[opcode]).append(", ");

        appendLabel(label);

        buf.append(");\n");

        text.add(buf.toString());

    }

    public void visitLabel(final Label label) {

        buf.setLength(0);

        declareLabel(label);

        buf.append("mv.visitLabel(");

        appendLabel(label);

        buf.append(");\n");

        text.add(buf.toString());

    }

    public void visitLdcInsn(final Object cst) {

        buf.setLength(0);

        buf.append("mv.visitLdcInsn(");

        appendConstant(cst);

        buf.append(");\n");

        text.add(buf.toString());

    }

    public void visitIincInsn(final int var, final int increment) {

        buf.setLength(0);

        buf.append("mv.visitIincInsn(")

                .append(var)

                .append(", ")

                .append(increment)

                .append(");\n");

        text.add(buf.toString());

    }

    public void visitTableSwitchInsn(

        final int min,

        final int max,

        final Label dflt,

        final Label labels[])

    {

        buf.setLength(0);

        for (int i = 0; i < labels.length; ++i) {

            declareLabel(labels[i]);

        }

        declareLabel(dflt);

        buf.append("mv.visitTableSwitchInsn(")

                .append(min)

                .append(", ")

                .append(max)

                .append(", ");

        appendLabel(dflt);

        buf.append(", new Label[] {");

        for (int i = 0; i < labels.length; ++i) {

            buf.append(i == 0 ? " " : ", ");

            appendLabel(labels[i]);

        }

        buf.append(" });\n");

        text.add(buf.toString());

    }

    public void visitLookupSwitchInsn(

        final Label dflt,

        final int keys[],

        final Label labels[])

    {

        buf.setLength(0);

        for (int i = 0; i < labels.length; ++i) {

            declareLabel(labels[i]);

        }

        declareLabel(dflt);

        buf.append("mv.visitLookupSwitchInsn(");

        appendLabel(dflt);

        buf.append(", new int[] {");

        for (int i = 0; i < keys.length; ++i) {

            buf.append(i == 0 ? " " : ", ").append(keys[i]);

        }

        buf.append(" }, new Label[] {");

        for (int i = 0; i < labels.length; ++i) {

            buf.append(i == 0 ? " " : ", ");

            appendLabel(labels[i]);

        }

        buf.append(" });\n");

        text.add(buf.toString());

    }

    public void visitMultiANewArrayInsn(final String desc, final int dims) {

        buf.setLength(0);

        buf.append("mv.visitMultiANewArrayInsn(");

        appendConstant(desc);

        buf.append(", ").append(dims).append(");\n");

        text.add(buf.toString());

    }

    public void visitTryCatchBlock(

        final Label start,

        final Label end,

        final Label handler,

        final String type)

    {

        buf.setLength(0);

        declareLabel(start);

        declareLabel(end);

        declareLabel(handler);

        buf.append("mv.visitTryCatchBlock(");

        appendLabel(start);

        buf.append(", ");

        appendLabel(end);

        buf.append(", ");

        appendLabel(handler);

        buf.append(", ");

        appendConstant(type);

        buf.append(");\n");

        text.add(buf.toString());

    }

    public void visitLocalVariable(

        final String name,

        final String desc,

        final String signature,

        final Label start,

        final Label end,

        final int index)

    {

        buf.setLength(0);

        buf.append("mv.visitLocalVariable(");

        appendConstant(name);

        buf.append(", ");

        appendConstant(desc);

        buf.append(", ");

        appendConstant(signature);

        buf.append(", ");

        appendLabel(start);

        buf.append(", ");

        appendLabel(end);

        buf.append(", ").append(index).append(");\n");

        text.add(buf.toString());

    }

    public void visitLineNumber(final int line, final Label start) {

        buf.setLength(0);

        buf.append("mv.visitLineNumber(").append(line).append(", ");

        appendLabel(start);

        buf.append(");\n");

        text.add(buf.toString());

    }

    public void visitMaxs(final int maxStack, final int maxLocals) {

        buf.setLength(0);

        buf.append("mv.visitMaxs(")

                .append(maxStack)

                .append(", ")

                .append(maxLocals)

                .append(");\n");

        text.add(buf.toString());

    }

    /**

     * Appends a declaration of the given label to {@link #buf buf}. This

     * declaration is of the form "Label lXXX = new Label();". Does nothing if

     * the given label has already been declared.

     *

     * @param l a label.

     */

    private void declareLabel(final Label l) {

        String name = (String) labelNames.get(l);

        if (name == null) {

            name = "l" + labelNames.size();

            labelNames.put(l, name);

            buf.append("Label ").append(name).append(" = new Label();\n");

        }

    }

    /**

     * Appends the name of the given label to {@link #buf buf}. The given label

     * <i>must</i> already have a name. One way to ensure this is to always

     * call {@link #declareLabel declared} before calling this method.

     *

     * @param l a label.

     */

    private void appendLabel(final Label l) {

        buf.append((String) labelNames.get(l));

    }

}