| /* |
| * Copyright (c) 2003, 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.ext; |
| |
| import java.nio.ByteBuffer; |
| import java.nio.CharBuffer; |
| import java.nio.charset.Charset; |
| import java.nio.charset.CharsetEncoder; |
| import java.nio.charset.CoderResult; |
| import sun.nio.cs.Surrogate; |
| |
| |
| public abstract class SimpleEUCEncoder |
| extends CharsetEncoder |
| { |
| |
| protected short index1[]; |
| protected String index2; |
| protected String index2a; |
| protected String index2b; |
| protected String index2c; |
| protected int mask1; |
| protected int mask2; |
| protected int shift; |
| |
| private byte[] outputByte = new byte[4]; |
| private final Surrogate.Parser sgp = new Surrogate.Parser(); |
| |
| protected SimpleEUCEncoder(Charset cs) |
| { |
| super(cs, 3.0f, 4.0f); |
| } |
| |
| /** |
| * Returns true if the given character can be converted to the |
| * target character encoding. |
| */ |
| |
| public boolean canEncode(char ch) { |
| int index; |
| String theChars; |
| |
| index = index1[((ch & mask1) >> shift)] + (ch & mask2); |
| |
| if (index < 7500) |
| theChars = index2; |
| else |
| if (index < 15000) { |
| index = index - 7500; |
| theChars = index2a; |
| } |
| else |
| if (index < 22500){ |
| index = index - 15000; |
| theChars = index2b; |
| } |
| else { |
| index = index - 22500; |
| theChars = index2c; |
| } |
| |
| if (theChars.charAt(2*index) != '\u0000' || |
| theChars.charAt(2*index + 1) != '\u0000') |
| return (true); |
| |
| // only return true if input char was unicode null - all others are |
| // undefined |
| return( ch == '\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); |
| |
| int index; |
| int spaceNeeded; |
| int i; |
| |
| try { |
| while (sp < sl) { |
| boolean allZeroes = true; |
| char inputChar = sa[sp]; |
| if (Character.isSurrogate(inputChar)) { |
| if (sgp.parse(inputChar, sa, sp, sl) < 0) |
| return sgp.error(); |
| return sgp.unmappableResult(); |
| } |
| |
| if (inputChar >= '\uFFFE') |
| return CoderResult.unmappableForLength(1); |
| |
| String theChars; |
| char aChar; |
| |
| // We have a valid character, get the bytes for it |
| index = index1[((inputChar & mask1) >> shift)] + (inputChar & mask2); |
| |
| if (index < 7500) |
| theChars = index2; |
| else if (index < 15000) { |
| index = index - 7500; |
| theChars = index2a; |
| } else if (index < 22500){ |
| index = index - 15000; |
| theChars = index2b; |
| } |
| else { |
| index = index - 22500; |
| theChars = index2c; |
| } |
| |
| aChar = theChars.charAt(2*index); |
| outputByte[0] = (byte)((aChar & 0xff00)>>8); |
| outputByte[1] = (byte)(aChar & 0x00ff); |
| aChar = theChars.charAt(2*index + 1); |
| outputByte[2] = (byte)((aChar & 0xff00)>>8); |
| outputByte[3] = (byte)(aChar & 0x00ff); |
| |
| for (i = 0; i < outputByte.length; i++) { |
| if (outputByte[i] != 0x00) { |
| allZeroes = false; |
| break; |
| } |
| } |
| |
| if (allZeroes && inputChar != '\u0000') { |
| return CoderResult.unmappableForLength(1); |
| } |
| |
| int oindex = 0; |
| |
| for (spaceNeeded = outputByte.length; |
| spaceNeeded > 1; spaceNeeded--){ |
| if (outputByte[oindex++] != 0x00 ) |
| break; |
| } |
| |
| if (dp + spaceNeeded > dl) |
| return CoderResult.OVERFLOW; |
| |
| for (i = outputByte.length - spaceNeeded; |
| i < outputByte.length; i++) { |
| da[dp++] = outputByte[i]; |
| } |
| sp++; |
| } |
| return CoderResult.UNDERFLOW; |
| } finally { |
| src.position(sp - src.arrayOffset()); |
| dst.position(dp - dst.arrayOffset()); |
| } |
| } |
| |
| private CoderResult encodeBufferLoop(CharBuffer src, ByteBuffer dst) { |
| int index; |
| int spaceNeeded; |
| int i; |
| int mark = src.position(); |
| try { |
| while (src.hasRemaining()) { |
| char inputChar = src.get(); |
| boolean allZeroes = true; |
| if (Character.isSurrogate(inputChar)) { |
| if (sgp.parse(inputChar, src) < 0) |
| return sgp.error(); |
| return sgp.unmappableResult(); |
| } |
| |
| if (inputChar >= '\uFFFE') |
| return CoderResult.unmappableForLength(1); |
| |
| String theChars; |
| char aChar; |
| |
| // We have a valid character, get the bytes for it |
| index = index1[((inputChar & mask1) >> shift)] + (inputChar & mask2); |
| |
| if (index < 7500) |
| theChars = index2; |
| else if (index < 15000) { |
| index = index - 7500; |
| theChars = index2a; |
| } else if (index < 22500){ |
| index = index - 15000; |
| theChars = index2b; |
| } |
| else { |
| index = index - 22500; |
| theChars = index2c; |
| } |
| |
| aChar = theChars.charAt(2*index); |
| outputByte[0] = (byte)((aChar & 0xff00)>>8); |
| outputByte[1] = (byte)(aChar & 0x00ff); |
| aChar = theChars.charAt(2*index + 1); |
| outputByte[2] = (byte)((aChar & 0xff00)>>8); |
| outputByte[3] = (byte)(aChar & 0x00ff); |
| |
| for (i = 0; i < outputByte.length; i++) { |
| if (outputByte[i] != 0x00) { |
| allZeroes = false; |
| break; |
| } |
| } |
| if (allZeroes && inputChar != '\u0000') { |
| return CoderResult.unmappableForLength(1); |
| } |
| |
| int oindex = 0; |
| |
| for (spaceNeeded = outputByte.length; |
| spaceNeeded > 1; spaceNeeded--){ |
| if (outputByte[oindex++] != 0x00 ) |
| break; |
| } |
| if (dst.remaining() < spaceNeeded) |
| return CoderResult.OVERFLOW; |
| |
| for (i = outputByte.length - spaceNeeded; |
| i < outputByte.length; i++) { |
| dst.put(outputByte[i]); |
| } |
| mark++; |
| } |
| 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)); |
| } |
| } |
