| /* |
| * Copyright (c) 1997, 2000, 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.io; |
| |
| /** |
| * @author Tom Zhou |
| */ |
| |
| public abstract class CharToByteISO2022 extends CharToByteConverter |
| { |
| private final byte ISO_ESC = 0x1b; |
| private final byte ISO_SI = 0x0f; |
| private final byte ISO_SO = 0x0e; |
| private final byte ISO_SS2_7 = 0x4e; |
| private final byte ISO_SS3_7 = 0x4f; |
| private final byte SS2 = (byte)0x8e; |
| private final byte P2 = (byte)0xA2; |
| private final byte P3 = (byte)0xA3; |
| private final byte MSB = (byte)0x80; |
| |
| protected final byte maximumDesignatorLength = 4; |
| |
| protected String SODesignator, |
| SS2Designator = null, |
| SS3Designator = null; |
| |
| protected CharToByteConverter codeConverter; |
| |
| private boolean shiftout = false; |
| private boolean SODesDefined = false; |
| private boolean SS2DesDefined = false; |
| private boolean SS3DesDefined = false; |
| |
| private boolean newshiftout = false; |
| private boolean newSODesDefined = false; |
| private boolean newSS2DesDefined = false; |
| private boolean newSS3DesDefined = false; |
| |
| public int flush(byte[] output, int outStart, int outEnd) |
| throws MalformedInputException |
| { |
| reset(); |
| return 0; |
| } |
| |
| public void reset() { |
| shiftout = false; |
| SODesDefined = false; |
| SS2DesDefined = false; |
| SS3DesDefined = false; |
| byteOff = charOff = 0; |
| } |
| |
| public boolean canConvert(char ch) |
| { |
| if (ch<0x80) |
| return true; |
| return codeConverter.canConvert(ch); |
| } |
| |
| private int unicodeToNative(char unicode, byte ebyte[]) |
| { |
| int index = 0; |
| byte tmpByte[]; |
| byte convByte[] = new byte[codeConverter.getMaxBytesPerChar()]; |
| char convChar[] = {unicode}; |
| int converted; |
| |
| try{ |
| converted = codeConverter.convert(convChar, 0, 1, convByte, 0, |
| codeConverter.getMaxBytesPerChar()); |
| } catch(Exception e) { |
| return -1; |
| } |
| |
| if (converted == 2) { |
| if (!SODesDefined) { |
| newSODesDefined = true; |
| ebyte[0] = ISO_ESC; |
| tmpByte = SODesignator.getBytes(); |
| System.arraycopy(tmpByte,0,ebyte,1,tmpByte.length); |
| index = tmpByte.length+1; |
| } |
| if (!shiftout) { |
| newshiftout = true; |
| ebyte[index++] = ISO_SO; |
| } |
| ebyte[index++] = (byte)(convByte[0]&0x7f); |
| ebyte[index++] = (byte)(convByte[1]&0x7f); |
| } else { |
| if((convByte[0] == SS2)&&(convByte[1] == P2)) { |
| if (!SS2DesDefined) { |
| newSS2DesDefined = true; |
| ebyte[0] = ISO_ESC; |
| tmpByte = SS2Designator.getBytes(); |
| System.arraycopy(tmpByte,0,ebyte,1,tmpByte.length); |
| index = tmpByte.length+1; |
| } |
| ebyte[index++] = ISO_ESC; |
| ebyte[index++] = ISO_SS2_7; |
| ebyte[index++] = (byte)(convByte[2]&0x7f); |
| ebyte[index++] = (byte)(convByte[3]&0x7f); |
| } |
| if((convByte[0] == SS2)&&(convByte[1] == 0xA3)) |
| { |
| if(!SS3DesDefined){ |
| newSS3DesDefined = true; |
| ebyte[0] = ISO_ESC; |
| tmpByte = SS3Designator.getBytes(); |
| System.arraycopy(tmpByte,0,ebyte,1,tmpByte.length); |
| index = tmpByte.length+1; |
| } |
| ebyte[index++] = ISO_ESC; |
| ebyte[index++] = ISO_SS3_7; |
| ebyte[index++] = (byte)(convByte[2]&0x7f); |
| ebyte[index++] = (byte)(convByte[3]&0x7f); |
| } |
| } |
| return index; |
| } |
| |
| /** |
| * Character conversion |
| */ |
| public int convert(char[] input, int inOff, int inEnd, |
| byte[] output, int outOff, int outEnd) |
| throws UnknownCharacterException, MalformedInputException, |
| ConversionBufferFullException |
| { |
| int outputSize; |
| byte [] tmpbuf = new byte[this.getMaxBytesPerChar()]; |
| byte [] outputByte; |
| |
| byteOff = outOff; |
| |
| newshiftout = shiftout; |
| newSODesDefined = SODesDefined; |
| newSS2DesDefined = SS2DesDefined; |
| newSS3DesDefined = SS3DesDefined; |
| |
| //Fixed 4122961 by bringing the charOff++ out to this |
| // loop where it belongs, changing the loop from |
| // while(){} to for(){}. |
| for (charOff = inOff; charOff < inEnd; charOff++) { |
| outputByte = tmpbuf; |
| if (input[charOff] < 0x80) { // ASCII |
| if (shiftout){ |
| newshiftout = false; |
| outputSize = 2; |
| outputByte[0] = ISO_SI; |
| outputByte[1] = (byte)(input[charOff] & 0x7f); |
| } else { |
| outputSize = 1; |
| outputByte[0] = (byte)(input[charOff] & 0x7f); |
| } |
| if(input[charOff] == '\n'){ |
| newSODesDefined = false; |
| newSS2DesDefined = false; |
| newSS3DesDefined = false; |
| } |
| } else { |
| outputSize = unicodeToNative(input[charOff], outputByte); |
| } |
| |
| if (outputSize == -1) { |
| if (subMode) { |
| if(!newSODesDefined){ |
| newSODesDefined = !newSODesDefined; |
| outputByte[0] = ISO_SO; |
| outputByte[1] = (byte)'?'; |
| outputSize = 2; |
| } else { |
| outputByte = subBytes; |
| outputSize = subBytes.length; |
| } |
| } else { |
| badInputLength = 1; |
| throw new UnknownCharacterException(); |
| } |
| } |
| |
| if (outEnd - byteOff < outputSize) |
| throw new ConversionBufferFullException(); |
| |
| for (int i = 0; i < outputSize; i++) |
| output[byteOff++] = outputByte[i]; |
| |
| // Bug 4266772. Update statuses only when output buffer has been |
| // updated. When ConversionBufferFullException() has been throwed |
| // we want to keep old statuses for next call. |
| shiftout = newshiftout; |
| SODesDefined = newSODesDefined; |
| SS2DesDefined = newSS2DesDefined; |
| SS3DesDefined = newSS3DesDefined; |
| } |
| return byteOff - outOff; |
| } |
| } |