| /* |
| * Copyright (c) 2000, 2006, 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.nio.cs; |
| |
| import java.nio.ByteBuffer; |
| import java.nio.CharBuffer; |
| import java.nio.charset.Charset; |
| import java.nio.charset.CharsetDecoder; |
| import java.nio.charset.CoderResult; |
| import java.nio.charset.CharacterCodingException; |
| import java.nio.charset.MalformedInputException; |
| import java.nio.charset.UnmappableCharacterException; |
| |
| |
| public abstract class SingleByteDecoder |
| extends CharsetDecoder |
| { |
| |
| private final String byteToCharTable; |
| |
| protected SingleByteDecoder(Charset cs, String byteToCharTable) { |
| super(cs, 1.0f, 1.0f); |
| this.byteToCharTable = byteToCharTable; |
| } |
| |
| private CoderResult decodeArrayLoop(ByteBuffer src, CharBuffer dst) { |
| byte[] sa = src.array(); |
| int sp = src.arrayOffset() + src.position(); |
| int sl = src.arrayOffset() + src.limit(); |
| assert (sp <= sl); |
| sp = (sp <= sl ? sp : sl); |
| char[] da = dst.array(); |
| int dp = dst.arrayOffset() + dst.position(); |
| int dl = dst.arrayOffset() + dst.limit(); |
| assert (dp <= dl); |
| dp = (dp <= dl ? dp : dl); |
| |
| try { |
| while (sp < sl) { |
| int b = sa[sp]; |
| |
| char c = decode(b); |
| if (c == '\uFFFD') |
| return CoderResult.unmappableForLength(1); |
| if (dl - dp < 1) |
| return CoderResult.OVERFLOW; |
| da[dp++] = c; |
| sp++; |
| } |
| return CoderResult.UNDERFLOW; |
| } finally { |
| src.position(sp - src.arrayOffset()); |
| dst.position(dp - dst.arrayOffset()); |
| } |
| } |
| |
| private CoderResult decodeBufferLoop(ByteBuffer src, CharBuffer dst) { |
| int mark = src.position(); |
| try { |
| while (src.hasRemaining()) { |
| int b = src.get(); |
| |
| char c = decode(b); |
| if (c == '\uFFFD') |
| return CoderResult.unmappableForLength(1); |
| if (!dst.hasRemaining()) |
| return CoderResult.OVERFLOW; |
| mark++; |
| dst.put(c); |
| } |
| return CoderResult.UNDERFLOW; |
| } finally { |
| src.position(mark); |
| } |
| } |
| |
| protected CoderResult decodeLoop(ByteBuffer src, CharBuffer dst) { |
| if (true && src.hasArray() && dst.hasArray()) |
| return decodeArrayLoop(src, dst); |
| else |
| return decodeBufferLoop(src, dst); |
| } |
| |
| public char decode(int byteIndex) { |
| int n = byteIndex + 128; |
| if (n >= byteToCharTable.length() || n < 0) |
| return '\uFFFD'; |
| return byteToCharTable.charAt(n); |
| } |
| } |