/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.harmony.archive.util;
public class Util {
public static boolean ASCIIIgnoreCaseRegionMatches(String s1, int start1,
String s2, int start2, int length) {
if (s1 != null && s2 != null) {
if (start1 < 0 || length > s1.length() - start1) {
return false;
}
if (start2 < 0 || length > s2.length() - start2) {
return false;
}
char c1, c2;
for (int i = 0; i < length; i++) {
if ((c1 = s1.charAt(start1++)) != (c2 = s2.charAt(start2++))
&& toASCIIUpperCase(c1) != toASCIIUpperCase(c2)) {
return false;
}
}
return true;
}
throw new NullPointerException();
}
public static final boolean equalsIgnoreCase(byte[] buf1, byte[] buf2) {
if (buf1 == buf2) {
return true;
}
if (buf1 == null || buf2 == null || buf1.length != buf2.length) {
return false;
}
byte b1, b2;
for (int i = 0; i < buf1.length; i++) {
if ((b1 = buf1[i]) != (b2 = buf2[i])
&& toASCIIUpperCase(b1) != toASCIIUpperCase(b2)) {
return false;
}
}
return true;
}
static final char toASCIIUpperCase(char c) {
if ('a' <= c && c <= 'z') {
return (char) (c - ('a' - 'A'));
}
return c;
}
static final byte toASCIIUpperCase(byte b) {
if ('a' <= b && b <= 'z') {
return (byte) (b - ('a' - 'A'));
}
return b;
}
}