/* * 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);    }}