| /* |
| * Copyright (c) 1996, 1998, 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 sun.io; |
| |
| /** |
| * @author Limin Shi |
| * @author Mark Son-Bell |
| */ |
| |
| public class CharToByteSJIS extends CharToByteJIS0208 { |
| CharToByteJIS0201 cbJIS0201 = new CharToByteJIS0201(); |
| |
| public String getCharacterEncoding() { |
| return "SJIS"; |
| } |
| |
| protected int convSingleByte(char inputChar, byte[] outputByte) { |
| byte b; |
| |
| // \u0000 - \u007F map straight through |
| if ((inputChar & 0xFF80) == 0) { |
| outputByte[0] = (byte)inputChar; |
| return 1; |
| } |
| |
| if ((b = cbJIS0201.getNative(inputChar)) == 0) |
| return 0; |
| |
| outputByte[0] = b; |
| return 1; |
| } |
| |
| protected int getNative(char ch) { |
| int offset = index1[ch >> 8] << 8; |
| int pos = index2[offset >> 12].charAt((offset & 0xfff) + (ch & 0xff)); |
| if (pos == 0) { |
| /* Zero value indicates this Unicode has no mapping to JIS0208. |
| * We bail here because the JIS -> SJIS algorithm produces |
| * bogus SJIS values for invalid JIS input. Zero should be the |
| * only invalid JIS value in our table. |
| */ |
| return 0; |
| } |
| /* |
| * This algorithm for converting from JIS to SJIS comes from Ken Lunde's |
| * "Understanding Japanese Information Processing", pg 163. |
| */ |
| int c1 = (pos >> 8) & 0xff; |
| int c2 = pos & 0xff; |
| int rowOffset = c1 < 0x5F ? 0x70 : 0xB0; |
| int cellOffset = (c1 % 2 == 1) ? (c2 > 0x5F ? 0x20 : 0x1F) : 0x7E; |
| return ((((c1 + 1 ) >> 1) + rowOffset) << 8) | (c2 + cellOffset); |
| } |
| } |