| /* |
| * Copyright (c) 1996, 2005, 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.font; |
| |
| import java.nio.CharBuffer; |
| import java.nio.ByteBuffer; |
| import java.nio.charset.*; |
| import sun.nio.cs.*; |
| import static sun.nio.cs.CharsetMapping.*; |
| |
| public class X11GB2312 extends Charset { |
| public X11GB2312 () { |
| super("X11GB2312", null); |
| } |
| public CharsetEncoder newEncoder() { |
| return new Encoder(this); |
| } |
| public CharsetDecoder newDecoder() { |
| return new Decoder(this); |
| } |
| |
| public boolean contains(Charset cs) { |
| return cs instanceof X11GB2312; |
| } |
| |
| private class Encoder extends CharsetEncoder { |
| private DoubleByte.Encoder enc = (DoubleByte.Encoder)new EUC_CN().newEncoder(); |
| |
| public Encoder(Charset cs) { |
| super(cs, 2.0f, 2.0f); |
| } |
| |
| public boolean canEncode(char c) { |
| if (c <= 0x7F) { |
| return false; |
| } |
| return enc.canEncode(c); |
| } |
| |
| protected int encodeDouble(char c) { |
| return enc.encodeChar(c); |
| } |
| |
| protected CoderResult encodeLoop(CharBuffer src, ByteBuffer dst) { |
| char[] sa = src.array(); |
| int sp = src.arrayOffset() + src.position(); |
| int sl = src.arrayOffset() + src.limit(); |
| |
| byte[] da = dst.array(); |
| int dp = dst.arrayOffset() + dst.position(); |
| int dl = dst.arrayOffset() + dst.limit(); |
| |
| try { |
| while (sp < sl) { |
| char c = sa[sp]; |
| if (c <= '\u007f') |
| return CoderResult.unmappableForLength(1); |
| int ncode = encodeDouble(c); |
| if (ncode != 0 && c != '\u0000' ) { |
| da[dp++] = (byte) ((ncode >> 8) & 0x7f); |
| da[dp++] = (byte) (ncode & 0x7f); |
| sp++; |
| continue; |
| } |
| return CoderResult.unmappableForLength(1); |
| } |
| return CoderResult.UNDERFLOW; |
| } finally { |
| src.position(sp - src.arrayOffset()); |
| dst.position(dp - dst.arrayOffset()); |
| } |
| } |
| public boolean isLegalReplacement(byte[] repl) { |
| return true; |
| } |
| } |
| |
| private class Decoder extends CharsetDecoder { |
| private DoubleByte.Decoder dec = (DoubleByte.Decoder)new EUC_CN().newDecoder(); |
| |
| public Decoder(Charset cs) { |
| super(cs, 0.5f, 1.0f); |
| } |
| |
| protected char decodeDouble(int b1, int b2) { |
| return dec.decodeDouble(b1, b2); |
| } |
| |
| protected CoderResult decodeLoop(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) { |
| if ( sl - sp < 2) { |
| return CoderResult.UNDERFLOW; |
| } |
| int b1 = sa[sp] & 0xFF | 0x80; |
| int b2 = sa[sp + 1] & 0xFF | 0x80; |
| char c = decodeDouble(b1, b2); |
| if (c == UNMAPPABLE_DECODING) { |
| return CoderResult.unmappableForLength(2); |
| } |
| if (dl - dp < 1) |
| return CoderResult.OVERFLOW; |
| da[dp++] = c; |
| sp +=2; |
| } |
| return CoderResult.UNDERFLOW; |
| } finally { |
| src.position(sp - src.arrayOffset()); |
| dst.position(dp - dst.arrayOffset()); |
| } |
| |
| } |
| } |
| |
| } |