| /* |
| * 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 |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* |
| * |
| * package private helper class which provides decoder (native->ucs) |
| * mapping capability for the benefit of compound encoders/decoders |
| * whose individual component submappings do not need an association with |
| * an enclosing charset |
| * |
| */ |
| |
| |
| public class DBCSDecoderMapping { |
| |
| /* 1rst level index */ |
| private short[] index1; |
| /* |
| * 2nd level index, provided by subclass |
| * every string has 0x10*(end-start+1) characters. |
| */ |
| private String[] index2; |
| |
| protected int start; |
| protected int end; |
| |
| protected static final char REPLACE_CHAR='\uFFFD'; |
| |
| public DBCSDecoderMapping(short[] index1, String[] index2, |
| int start, int end) { |
| this.index1 = index1; |
| this.index2 = index2; |
| this.start = start; |
| this.end = end; |
| } |
| |
| /* |
| * Can be changed by subclass |
| */ |
| protected char decodeSingle(int b) { |
| if (b >= 0) |
| return (char) b; |
| return REPLACE_CHAR; |
| } |
| |
| protected char decodeDouble(int byte1, int byte2) { |
| if (((byte1 < 0) || (byte1 > index1.length)) |
| || ((byte2 < start) || (byte2 > end))) |
| return REPLACE_CHAR; |
| |
| int n = (index1[byte1] & 0xf) * (end - start + 1) + (byte2 - start); |
| return index2[index1[byte1] >> 4].charAt(n); |
| } |
| } |