| /* |
| * Copyright (c) 2000, 2012, 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. |
| */ |
| |
| /* |
| */ |
| |
| |
| import java.nio.ByteBuffer; |
| import java.nio.CharBuffer; |
| import java.nio.charset.Charset; |
| import java.nio.charset.CharsetEncoder; |
| import java.nio.charset.CoderResult; |
| import java.nio.charset.CharacterCodingException; |
| import java.nio.charset.MalformedInputException; |
| import java.nio.charset.UnmappableCharacterException; |
| import sun.nio.cs.Surrogate; |
| |
| |
| public abstract class SingleByteEncoder |
| extends CharsetEncoder |
| { |
| |
| private final short index1[]; |
| private final String index2; |
| private final int mask1; |
| private final int mask2; |
| private final int shift; |
| |
| private final Surrogate.Parser sgp = new Surrogate.Parser(); |
| |
| protected SingleByteEncoder(Charset cs, |
| short[] index1, String index2, |
| int mask1, int mask2, int shift) |
| { |
| super(cs, 1.0f, 1.0f); |
| this.index1 = index1; |
| this.index2 = index2; |
| this.mask1 = mask1; |
| this.mask2 = mask2; |
| this.shift = shift; |
| } |
| |
| public boolean canEncode(char c) { |
| char testEncode = index2.charAt(index1[(c & mask1) >> shift] |
| + (c & mask2)); |
| return testEncode != '\u0000' || c == '\u0000'; |
| } |
| |
| private CoderResult encodeArrayLoop(CharBuffer src, ByteBuffer dst) { |
| char[] sa = src.array(); |
| int sp = src.arrayOffset() + src.position(); |
| int sl = src.arrayOffset() + src.limit(); |
| assert (sp <= sl); |
| sp = (sp <= sl ? sp : sl); |
| byte[] 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) { |
| char c = sa[sp]; |
| if (Character.isSurrogate(c)) { |
| if (sgp.parse(c, sa, sp, sl) < 0) |
| return sgp.error(); |
| return sgp.unmappableResult(); |
| } |
| if (c >= '\uFFFE') |
| return CoderResult.unmappableForLength(1); |
| if (dl - dp < 1) |
| return CoderResult.OVERFLOW; |
| |
| char e = index2.charAt(index1[(c & mask1) >> shift] |
| + (c & mask2)); |
| |
| // If output byte is zero because input char is zero |
| // then character is mappable, o.w. fail |
| if (e == '\u0000' && c != '\u0000') |
| return CoderResult.unmappableForLength(1); |
| |
| sp++; |
| da[dp++] = (byte)e; |
| } |
| return CoderResult.UNDERFLOW; |
| } finally { |
| src.position(sp - src.arrayOffset()); |
| dst.position(dp - dst.arrayOffset()); |
| } |
| } |
| |
| private CoderResult encodeBufferLoop(CharBuffer src, ByteBuffer dst) { |
| int mark = src.position(); |
| try { |
| while (src.hasRemaining()) { |
| char c = src.get(); |
| if (Character.isSurrogate(c)) { |
| if (sgp.parse(c, src) < 0) |
| return sgp.error(); |
| return sgp.unmappableResult(); |
| } |
| if (c >= '\uFFFE') |
| return CoderResult.unmappableForLength(1); |
| if (!dst.hasRemaining()) |
| return CoderResult.OVERFLOW; |
| |
| char e = index2.charAt(index1[(c & mask1) >> shift] |
| + (c & mask2)); |
| |
| // If output byte is zero because input char is zero |
| // then character is mappable, o.w. fail |
| if (e == '\u0000' && c != '\u0000') |
| return CoderResult.unmappableForLength(1); |
| |
| mark++; |
| dst.put((byte)e); |
| } |
| return CoderResult.UNDERFLOW; |
| } finally { |
| src.position(mark); |
| } |
| } |
| |
| protected CoderResult encodeLoop(CharBuffer src, ByteBuffer dst) { |
| if (true && src.hasArray() && dst.hasArray()) |
| return encodeArrayLoop(src, dst); |
| else |
| return encodeBufferLoop(src, dst); |
| } |
| |
| public byte encode(char inputChar) { |
| return (byte)index2.charAt(index1[(inputChar & mask1) >> shift] + |
| (inputChar & mask2)); |
| } |
| } |