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	/*
	* Copyright (c) 2010, 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.
	*/

	/*
	*******************************************************************************
	* Copyright (C) 2009, International Business Machines Corporation and *
	* others. All Rights Reserved. *
	*******************************************************************************
	*/
	package sun.util.locale;

	public final class AsciiUtil {
	public static boolean caseIgnoreMatch(String s1, String s2) {
	if (s1 == s2) {
	return true;
	}
	int len = s1.length();
	if (len != s2.length()) {
	return false;
	}
	int i = 0;
	while (i < len) {
	char c1 = s1.charAt(i);
	char c2 = s2.charAt(i);
	if (c1 != c2 && toLower(c1) != toLower(c2)) {
	break;
	}
	i++;
	}
	return (i == len);
	}

	public static int caseIgnoreCompare(String s1, String s2) {
	if (s1 == s2) {
	return 0;
	}
	return AsciiUtil.toLowerString(s1).compareTo(AsciiUtil.toLowerString(s2));
	}


	public static char toUpper(char c) {
	if (c >= 'a' && c <= 'z') {
	c -= 0x20;
	}
	return c;
	}

	public static char toLower(char c) {
	if (c >= 'A' && c <= 'Z') {
	c += 0x20;
	}
	return c;
	}

	public static String toLowerString(String s) {
	int idx = 0;
	for (; idx < s.length(); idx++) {
	char c = s.charAt(idx);
	if (c >= 'A' && c <= 'Z') {
	break;
	}
	}
	if (idx == s.length()) {
	return s;
	}
	StringBuilder buf = new StringBuilder(s.substring(0, idx));
	for (; idx < s.length(); idx++) {
	buf.append(toLower(s.charAt(idx)));
	}
	return buf.toString();
	}

	public static String toUpperString(String s) {
	int idx = 0;
	for (; idx < s.length(); idx++) {
	char c = s.charAt(idx);
	if (c >= 'a' && c <= 'z') {
	break;
	}
	}
	if (idx == s.length()) {
	return s;
	}
	StringBuilder buf = new StringBuilder(s.substring(0, idx));
	for (; idx < s.length(); idx++) {
	buf.append(toUpper(s.charAt(idx)));
	}
	return buf.toString();
	}

	public static String toTitleString(String s) {
	if (s.length() == 0) {
	return s;
	}
	int idx = 0;
	char c = s.charAt(idx);
	if (!(c >= 'a' && c <= 'z')) {
	for (idx = 1; idx < s.length(); idx++) {
	if (c >= 'A' && c <= 'Z') {
	break;
	}
	}
	}
	if (idx == s.length()) {
	return s;
	}
	StringBuilder buf = new StringBuilder(s.substring(0, idx));
	if (idx == 0) {
	buf.append(toUpper(s.charAt(idx)));
	idx++;
	}
	for (; idx < s.length(); idx++) {
	buf.append(toLower(s.charAt(idx)));
	}
	return buf.toString();
	}

	public static boolean isAlpha(char c) {
	return (c >= 'A' && c <= 'Z') \|\| (c >= 'a' && c <= 'z');
	}

	public static boolean isAlphaString(String s) {
	boolean b = true;
	for (int i = 0; i < s.length(); i++) {
	if (!isAlpha(s.charAt(i))) {
	b = false;
	break;
	}
	}
	return b;
	}

	public static boolean isNumeric(char c) {
	return (c >= '0' && c <= '9');
	}

	public static boolean isNumericString(String s) {
	boolean b = true;
	for (int i = 0; i < s.length(); i++) {
	if (!isNumeric(s.charAt(i))) {
	b = false;
	break;
	}
	}
	return b;
	}

	public static boolean isAlphaNumeric(char c) {
	return isAlpha(c) \|\| isNumeric(c);
	}

	public static boolean isAlphaNumericString(String s) {
	boolean b = true;
	for (int i = 0; i < s.length(); i++) {
	if (!isAlphaNumeric(s.charAt(i))) {
	b = false;
	break;
	}
	}
	return b;
	}

	public static class CaseInsensitiveKey {
	private String _key;
	private int _hash;

	public CaseInsensitiveKey(String key) {
	_key = key;
	_hash = AsciiUtil.toLowerString(key).hashCode();
	}

	public boolean equals(Object o) {
	if (this == o) {
	return true;
	}
	if (o instanceof CaseInsensitiveKey) {
	return AsciiUtil.caseIgnoreMatch(_key, ((CaseInsensitiveKey)o)._key);
	}
	return false;
	}

	public int hashCode() {
	return _hash;
	}
	}
	}

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