| /* |
| * Copyright (c) 2004, 2011, 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. |
| * |
| * THIS FILE WAS MODIFIED BY SUN MICROSYSTEMS, INC. |
| */ |
| |
| package com.sun.xml.internal.fastinfoset.util; |
| |
| public class CharArray implements CharSequence { |
| public char[] ch; |
| public int start; |
| public int length; |
| |
| protected int _hash; |
| |
| protected CharArray() { |
| } |
| |
| public CharArray(char[] _ch, int _start, int _length, boolean copy) { |
| set(_ch, _start, _length, copy); |
| } |
| |
| public final void set(char[] _ch, int _start, int _length, boolean copy) { |
| if (copy) { |
| ch = new char[_length]; |
| start = 0; |
| length = _length; |
| System.arraycopy(_ch, _start, ch, 0, _length); |
| } else { |
| ch = _ch; |
| start = _start; |
| length = _length; |
| } |
| _hash = 0; |
| } |
| |
| public final void cloneArray() { |
| char[] _ch = new char[length]; |
| System.arraycopy(ch, start, _ch, 0, length); |
| ch = _ch; |
| start = 0; |
| } |
| |
| public String toString() { |
| return new String(ch, start, length); |
| } |
| |
| public int hashCode() { |
| if (_hash == 0) { |
| // Same hash code algorithm as used for String |
| // s[0]*31^(n-1) + s[1]*31^(n-2) + ... + s[n-1] |
| for (int i = start; i < start + length; i++) { |
| _hash = 31*_hash + ch[i]; |
| } |
| } |
| return _hash; |
| } |
| |
| public static final int hashCode(char[] ch, int start, int length) { |
| // Same hash code algorithm as used for String |
| // s[0]*31^(n-1) + s[1]*31^(n-2) + ... + s[n-1] |
| int hash = 0; |
| for (int i = start; i < start + length; i++) { |
| hash = 31*hash + ch[i]; |
| } |
| |
| return hash; |
| } |
| |
| public final boolean equalsCharArray(CharArray cha) { |
| if (this == cha) { |
| return true; |
| } |
| |
| if (length == cha.length) { |
| int n = length; |
| int i = start; |
| int j = cha.start; |
| while (n-- != 0) { |
| if (ch[i++] != cha.ch[j++]) |
| return false; |
| } |
| return true; |
| } |
| |
| return false; |
| } |
| |
| public final boolean equalsCharArray(char[] ch, int start, int length) { |
| if (this.length == length) { |
| int n = this.length; |
| int i = this.start; |
| int j = start; |
| while (n-- != 0) { |
| if (this.ch[i++] != ch[j++]) |
| return false; |
| } |
| return true; |
| } |
| |
| return false; |
| } |
| |
| public boolean equals(Object obj) { |
| if (this == obj) { |
| return true; |
| } |
| if (obj instanceof CharArray) { |
| CharArray cha = (CharArray)obj; |
| if (length == cha.length) { |
| int n = length; |
| int i = start; |
| int j = cha.start; |
| while (n-- != 0) { |
| if (ch[i++] != cha.ch[j++]) |
| return false; |
| } |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| // CharSequence interface |
| |
| public final int length() { |
| return length; |
| } |
| |
| public final char charAt(int index) { |
| return ch[start + index]; |
| } |
| |
| public final CharSequence subSequence(int start, int end) { |
| return new CharArray(ch, this.start + start, end - start, false); |
| } |
| } |