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| 1 | +/* | |
| 2 | + * Copyright (c) 2003, Oracle and/or its affiliates. All rights reserved. | |
| 3 | + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| 4 | + * | |
| 5 | + * This code is free software; you can redistribute it and/or modify it | |
| 6 | + * under the terms of the GNU General Public License version 2 only, as | |
| 7 | + * published by the Free Software Foundation. Oracle designates this | |
| 8 | + * particular file as subject to the "Classpath" exception as provided | |
| 9 | + * by Oracle in the LICENSE file that accompanied this code. | |
| 10 | + * | |
| 11 | + * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 12 | + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 13 | + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 14 | + * version 2 for more details (a copy is included in the LICENSE file that | |
| 15 | + * accompanied this code). | |
| 16 | + * | |
| 17 | + * You should have received a copy of the GNU General Public License version | |
| 18 | + * 2 along with this work; if not, write to the Free Software Foundation, | |
| 19 | + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 20 | + * | |
| 21 | + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 22 | + * or visit www.oracle.com if you need additional information or have any | |
| 23 | + * questions. | |
| 24 | + */ | |
| 25 | + | |
| 26 | +package sun.text; | |
| 27 | + | |
| 28 | +/** | |
| 29 | + * SupplementaryCharacterData is an SMI-private class which was written for | |
| 30 | + * RuleBasedBreakIterator and BreakDictionary. | |
| 31 | + */ | |
| 32 | +public final class SupplementaryCharacterData implements Cloneable { | |
| 33 | + | |
| 34 | + /** | |
| 35 | + * An array for supplementary characters and values. | |
| 36 | + * Lower one byte is used to keep a byte-value. | |
| 37 | + * Upper three bytes are used to keep the first supplementary character | |
| 38 | + * which has the value. The value is also valid for the following | |
| 39 | + * supplementary characters until the next supplementary character in | |
| 40 | + * the array <code>dataTable</code>. | |
| 41 | + * For example, if the value of <code>dataTable[2]</code> is | |
| 42 | + * <code>0x01000123</code> and the value of <code>dataTable[3]</code> is | |
| 43 | + * <code>0x01000567</code>, supplementary characters from | |
| 44 | + * <code>0x10001</code> to <code>0x10004</code> has the value | |
| 45 | + * <code>0x23</code>. And, <code>getValue(0x10003)</code> returns the value. | |
| 46 | + */ | |
| 47 | + private int[] dataTable; | |
| 48 | + | |
| 49 | + | |
| 50 | + /** | |
| 51 | + * Creates a new SupplementaryCharacterData object with the given table. | |
| 52 | + */ | |
| 53 | + public SupplementaryCharacterData(int[] table) { | |
| 54 | + dataTable = table; | |
| 55 | + } | |
| 56 | + | |
| 57 | + /** | |
| 58 | + * Returns a corresponding value for the given supplementary code-point. | |
| 59 | + */ | |
| 60 | + public int getValue(int index) { | |
| 61 | + // Index should be a valid supplementary character. | |
| 62 | + assert index >= Character.MIN_SUPPLEMENTARY_CODE_POINT && | |
| 63 | + index <= Character.MAX_CODE_POINT : | |
| 64 | + "Invalid code point:" + Integer.toHexString(index); | |
| 65 | + | |
| 66 | + int i = 0; | |
| 67 | + int j = dataTable.length - 1; | |
| 68 | + int k; | |
| 69 | + | |
| 70 | + for (;;) { | |
| 71 | + k = (i + j) / 2; | |
| 72 | + | |
| 73 | + int start = dataTable[k] >> 8; | |
| 74 | + int end = dataTable[k+1] >> 8; | |
| 75 | + | |
| 76 | + if (index < start) { | |
| 77 | + j = k; | |
| 78 | + } else if (index > (end-1)) { | |
| 79 | + i = k; | |
| 80 | + } else { | |
| 81 | + return dataTable[k] & 0xFF; | |
| 82 | + } | |
| 83 | + } | |
| 84 | + } | |
| 85 | + | |
| 86 | + /** | |
| 87 | + * Returns the data array. | |
| 88 | + */ | |
| 89 | + public int[] getArray() { | |
| 90 | + return dataTable; | |
| 91 | + } | |
| 92 | + | |
| 93 | +} | |