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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.signature;

	/**
	* A type signature parser to make a signature visitor visit an existing
	* signature.
	*
	* @author Thomas Hallgren
	* @author Eric Bruneton
	*/
	public class SignatureReader {

	/**
	* The signature to be read.
	*/
	private final String signature;

	/**
	* Constructs a {@link SignatureReader} for the given signature.
	*
	* @param signature
	* A <i>ClassSignature</i>, <i>MethodTypeSignature</i>, or
	* <i>FieldTypeSignature</i>.
	*/
	public SignatureReader(final String signature) {
	this.signature = signature;
	}

	/**
	* Makes the given visitor visit the signature of this
	* {@link SignatureReader}. This signature is the one specified in the
	* constructor (see {@link #SignatureReader(String) SignatureReader}). This
	* method is intended to be called on a {@link SignatureReader} that was
	* created using a <i>ClassSignature</i> (such as the <code>signature</code>
	* parameter of the {@link jdk.internal.org.objectweb.asm.ClassVisitor#visit
	* ClassVisitor.visit} method) or a <i>MethodTypeSignature</i> (such as the
	* <code>signature</code> parameter of the
	* {@link jdk.internal.org.objectweb.asm.ClassVisitor#visitMethod
	* ClassVisitor.visitMethod} method).
	*
	* @param v
	* the visitor that must visit this signature.
	*/
	public void accept(final SignatureVisitor v) {
	String signature = this.signature;
	int len = signature.length();
	int pos;
	char c;

	if (signature.charAt(0) == '<') {
	pos = 2;
	do {
	int end = signature.indexOf(':', pos);
	v.visitFormalTypeParameter(signature.substring(pos - 1, end));
	pos = end + 1;

	c = signature.charAt(pos);
	if (c == 'L' \|\| c == '[' \|\| c == 'T') {
	pos = parseType(signature, pos, v.visitClassBound());
	}

	while ((c = signature.charAt(pos++)) == ':') {
	pos = parseType(signature, pos, v.visitInterfaceBound());
	}
	} while (c != '>');
	} else {
	pos = 0;
	}

	if (signature.charAt(pos) == '(') {
	pos++;
	while (signature.charAt(pos) != ')') {
	pos = parseType(signature, pos, v.visitParameterType());
	}
	pos = parseType(signature, pos + 1, v.visitReturnType());
	while (pos < len) {
	pos = parseType(signature, pos + 1, v.visitExceptionType());
	}
	} else {
	pos = parseType(signature, pos, v.visitSuperclass());
	while (pos < len) {
	pos = parseType(signature, pos, v.visitInterface());
	}
	}
	}

	/**
	* Makes the given visitor visit the signature of this
	* {@link SignatureReader}. This signature is the one specified in the
	* constructor (see {@link #SignatureReader(String) SignatureReader}). This
	* method is intended to be called on a {@link SignatureReader} that was
	* created using a <i>FieldTypeSignature</i>, such as the
	* <code>signature</code> parameter of the
	* {@link jdk.internal.org.objectweb.asm.ClassVisitor#visitField ClassVisitor.visitField}
	* or {@link jdk.internal.org.objectweb.asm.MethodVisitor#visitLocalVariable
	* MethodVisitor.visitLocalVariable} methods.
	*
	* @param v
	* the visitor that must visit this signature.
	*/
	public void acceptType(final SignatureVisitor v) {
	parseType(this.signature, 0, v);
	}

	/**
	* Parses a field type signature and makes the given visitor visit it.
	*
	* @param signature
	* a string containing the signature that must be parsed.
	* @param pos
	* index of the first character of the signature to parsed.
	* @param v
	* the visitor that must visit this signature.
	* @return the index of the first character after the parsed signature.
	*/
	private static int parseType(final String signature, int pos,
	final SignatureVisitor v) {
	char c;
	int start, end;
	boolean visited, inner;
	String name;

	switch (c = signature.charAt(pos++)) {
	case 'Z':
	case 'C':
	case 'B':
	case 'S':
	case 'I':
	case 'F':
	case 'J':
	case 'D':
	case 'V':
	v.visitBaseType(c);
	return pos;

	case '[':
	return parseType(signature, pos, v.visitArrayType());

	case 'T':
	end = signature.indexOf(';', pos);
	v.visitTypeVariable(signature.substring(pos, end));
	return end + 1;

	default: // case 'L':
	start = pos;
	visited = false;
	inner = false;
	for (;;) {
	switch (c = signature.charAt(pos++)) {
	case '.':
	case ';':
	if (!visited) {
	name = signature.substring(start, pos - 1);
	if (inner) {
	v.visitInnerClassType(name);
	} else {
	v.visitClassType(name);
	}
	}
	if (c == ';') {
	v.visitEnd();
	return pos;
	}
	start = pos;
	visited = false;
	inner = true;
	break;

	case '<':
	name = signature.substring(start, pos - 1);
	if (inner) {
	v.visitInnerClassType(name);
	} else {
	v.visitClassType(name);
	}
	visited = true;
	top: for (;;) {
	switch (c = signature.charAt(pos)) {
	case '>':
	break top;
	case '*':
	++pos;
	v.visitTypeArgument();
	break;
	case '+':
	case '-':
	pos = parseType(signature, pos + 1,
	v.visitTypeArgument(c));
	break;
	default:
	pos = parseType(signature, pos,
	v.visitTypeArgument('='));
	break;
	}
	}
	}
	}
	}
	}
	}

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