65 lines
2.1 KiB
Java
65 lines
2.1 KiB
Java
/*
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* Copyright 2008 Pirion Systems Pty Ltd, 139 Warry St,
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* Fortitude Valley, Queensland, Australia
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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package com.sun.pdfview;
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import com.sun.pdfview.PDFStringUtil;
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import java.nio.charset.CharsetEncoder;
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import java.nio.charset.CoderResult;
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import java.nio.charset.Charset;
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import java.nio.CharBuffer;
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import java.nio.ByteBuffer;
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import java.util.Map;
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import java.util.HashMap;
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/**
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* A {@link CharsetEncoder} that attempts to write out the lower 8 bits
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* of any character. Characters >= 256 in value are regarded
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* as unmappable.
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*
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* @author Luke Kirby
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*/
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public class Identity8BitCharsetEncoder extends CharsetEncoder {
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public Identity8BitCharsetEncoder() {
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super(null, 1, 1);
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}
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protected CoderResult encodeLoop(CharBuffer in, ByteBuffer out) {
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while (in.remaining() > 0) {
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if (out.remaining() < 1) {
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return CoderResult.OVERFLOW;
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}
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final char c = in.get();
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if (c >= 0 && c < 256) {
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out.put((byte) c);
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} else {
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return CoderResult.unmappableForLength(1);
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}
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}
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return CoderResult.UNDERFLOW;
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}
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@Override
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public boolean isLegalReplacement(byte[] repl) {
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// avoid referencing the non-existent character set
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return true;
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}
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} |