/*
* Copyright 2012 Takao Nakaguchi
*
* Licensed 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.trie4j.patricia.terminletters;
public class CharsUtil {
public static char[] newTerminatedChars(char[] letters){
char[] l = new char[letters.length + 1];
System.arraycopy(letters, 0, l, 0, l.length - 1);
l[l.length - 1] = 0xffff;
return l;
}
public static char[] newTerminatedCharsFrom(char[] org, int from, int to){
char[] ret = new char[to - from + 1];
System.arraycopy(org, from, ret, 0, to - from);
ret[ret.length - 1] = 0xffff;
return ret;
}
public static char[] revertWithoutTerminator(char[] values){
int n = values.length;
if(n > 0 && values[n - 1] == 0xffff){
n--;
}
char[] ret = new char[n];
for(int i = 0; i < n; i++){
ret[n - i - 1] = values[i];
}
return ret;
}
}