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	/*
	* 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.
	*/

	/*
	* This file is available under and governed by the GNU General Public
	* License version 2 only, as published by the Free Software Foundation.
	* However, the following notice accompanied the original version of this
	* file:
	*
	* ASM: a very small and fast Java bytecode manipulation framework
	* Copyright (c) 2000-2011 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 jdk.internal.org.objectweb.asm.commons;

	import jdk.internal.org.objectweb.asm.ConstantDynamic;
	import jdk.internal.org.objectweb.asm.Handle;
	import jdk.internal.org.objectweb.asm.Label;
	import jdk.internal.org.objectweb.asm.MethodVisitor;
	import jdk.internal.org.objectweb.asm.Opcodes;

	/**
	* A {@link MethodVisitor} that approximates the size of the methods it visits.
	*
	* @author Eugene Kuleshov
	*/
	public class CodeSizeEvaluator extends MethodVisitor implements Opcodes {

	/** The minimum size in bytes of the visited method. */
	private int minSize;

	/** The maximum size in bytes of the visited method. */
	private int maxSize;

	public CodeSizeEvaluator(final MethodVisitor methodVisitor) {
	this(/* latest api = */ Opcodes.ASM8, methodVisitor);
	}

	protected CodeSizeEvaluator(final int api, final MethodVisitor methodVisitor) {
	super(api, methodVisitor);
	}

	public int getMinSize() {
	return this.minSize;
	}

	public int getMaxSize() {
	return this.maxSize;
	}

	@Override
	public void visitInsn(final int opcode) {
	minSize += 1;
	maxSize += 1;
	super.visitInsn(opcode);
	}

	@Override
	public void visitIntInsn(final int opcode, final int operand) {
	if (opcode == SIPUSH) {
	minSize += 3;
	maxSize += 3;
	} else {
	minSize += 2;
	maxSize += 2;
	}
	super.visitIntInsn(opcode, operand);
	}

	@Override
	public void visitVarInsn(final int opcode, final int var) {
	if (var < 4 && opcode != RET) {
	minSize += 1;
	maxSize += 1;
	} else if (var >= 256) {
	minSize += 4;
	maxSize += 4;
	} else {
	minSize += 2;
	maxSize += 2;
	}
	super.visitVarInsn(opcode, var);
	}

	@Override
	public void visitTypeInsn(final int opcode, final String type) {
	minSize += 3;
	maxSize += 3;
	super.visitTypeInsn(opcode, type);
	}

	@Override
	public void visitFieldInsn(
	final int opcode, final String owner, final String name, final String descriptor) {
	minSize += 3;
	maxSize += 3;
	super.visitFieldInsn(opcode, owner, name, descriptor);
	}

	@Override
	public void visitMethodInsn(
	final int opcodeAndSource,
	final String owner,
	final String name,
	final String descriptor,
	final boolean isInterface) {
	if (api < Opcodes.ASM5 && (opcodeAndSource & Opcodes.SOURCE_DEPRECATED) == 0) {
	// Redirect the call to the deprecated version of this method.
	super.visitMethodInsn(opcodeAndSource, owner, name, descriptor, isInterface);
	return;
	}
	int opcode = opcodeAndSource & ~Opcodes.SOURCE_MASK;

	if (opcode == INVOKEINTERFACE) {
	minSize += 5;
	maxSize += 5;
	} else {
	minSize += 3;
	maxSize += 3;
	}
	super.visitMethodInsn(opcodeAndSource, owner, name, descriptor, isInterface);
	}

	@Override
	public void visitInvokeDynamicInsn(
	final String name,
	final String descriptor,
	final Handle bootstrapMethodHandle,
	final Object... bootstrapMethodArguments) {
	minSize += 5;
	maxSize += 5;
	super.visitInvokeDynamicInsn(name, descriptor, bootstrapMethodHandle, bootstrapMethodArguments);
	}

	@Override
	public void visitJumpInsn(final int opcode, final Label label) {
	minSize += 3;
	if (opcode == GOTO \|\| opcode == JSR) {
	maxSize += 5;
	} else {
	maxSize += 8;
	}
	super.visitJumpInsn(opcode, label);
	}

	@Override
	public void visitLdcInsn(final Object value) {
	if (value instanceof Long
	\|\| value instanceof Double
	\|\| (value instanceof ConstantDynamic && ((ConstantDynamic) value).getSize() == 2)) {
	minSize += 3;
	maxSize += 3;
	} else {
	minSize += 2;
	maxSize += 3;
	}
	super.visitLdcInsn(value);
	}

	@Override
	public void visitIincInsn(final int var, final int increment) {
	if (var > 255 \|\| increment > 127 \|\| increment < -128) {
	minSize += 6;
	maxSize += 6;
	} else {
	minSize += 3;
	maxSize += 3;
	}
	super.visitIincInsn(var, increment);
	}

	@Override
	public void visitTableSwitchInsn(
	final int min, final int max, final Label dflt, final Label... labels) {
	minSize += 13 + labels.length * 4;
	maxSize += 16 + labels.length * 4;
	super.visitTableSwitchInsn(min, max, dflt, labels);
	}

	@Override
	public void visitLookupSwitchInsn(final Label dflt, final int[] keys, final Label[] labels) {
	minSize += 9 + keys.length * 8;
	maxSize += 12 + keys.length * 8;
	super.visitLookupSwitchInsn(dflt, keys, labels);
	}

	@Override
	public void visitMultiANewArrayInsn(final String descriptor, final int numDimensions) {
	minSize += 4;
	maxSize += 4;
	super.visitMultiANewArrayInsn(descriptor, numDimensions);
	}
	}

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