/*
* Copyright (c) 2003, 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
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* questions.
*/
package sun.text;
/**
* SupplementaryCharacterData is an SMI-private class which was written for
* RuleBasedBreakIterator and BreakDictionary.
*/
public final class SupplementaryCharacterData implements Cloneable {
/**
* An array for supplementary characters and values.
* Lower one byte is used to keep a byte-value.
* Upper three bytes are used to keep the first supplementary character
* which has the value. The value is also valid for the following
* supplementary characters until the next supplementary character in
* the array <code>dataTable</code>.
* For example, if the value of <code>dataTable[2]</code> is
* <code>0x01000123</code> and the value of <code>dataTable[3]</code> is
* <code>0x01000567</code>, supplementary characters from
* <code>0x10001</code> to <code>0x10004</code> has the value
* <code>0x23</code>. And, <code>getValue(0x10003)</code> returns the value.
*/
private int[] dataTable;
/**
* Creates a new SupplementaryCharacterData object with the given table.
*/
public SupplementaryCharacterData(int[] table) {
dataTable = table;
}
/**
* Returns a corresponding value for the given supplementary code-point.
*/
public int getValue(int index) {
// Index should be a valid supplementary character.
assert index >= Character.MIN_SUPPLEMENTARY_CODE_POINT &&
index <= Character.MAX_CODE_POINT :
"Invalid code point:" + Integer.toHexString(index);
int i = 0;
int j = dataTable.length - 1;
int k;
for (;;) {
k = (i + j) / 2;
int start = dataTable[k] >> 8;
int end = dataTable[k+1] >> 8;
if (index < start) {
j = k;
} else if (index > (end-1)) {
i = k;
} else {
return dataTable[k] & 0xFF;
}
}
}
/**
* Returns the data array.
*/
public int[] getArray() {
return dataTable;
}
}