J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1997-2000 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun in the LICENSE file that accompanied this code. |
| 10 | * |
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 14 | * version 2 for more details (a copy is included in the LICENSE file that |
| 15 | * accompanied this code). |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License version |
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | * |
| 21 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | package sun.io; |
| 27 | |
| 28 | /** |
| 29 | * @author Tom Zhou |
| 30 | */ |
| 31 | |
| 32 | public abstract class CharToByteISO2022 extends CharToByteConverter |
| 33 | { |
| 34 | private final byte ISO_ESC = 0x1b; |
| 35 | private final byte ISO_SI = 0x0f; |
| 36 | private final byte ISO_SO = 0x0e; |
| 37 | private final byte ISO_SS2_7 = 0x4e; |
| 38 | private final byte ISO_SS3_7 = 0x4f; |
| 39 | private final byte SS2 = (byte)0x8e; |
| 40 | private final byte P2 = (byte)0xA2; |
| 41 | private final byte P3 = (byte)0xA3; |
| 42 | private final byte MSB = (byte)0x80; |
| 43 | |
| 44 | protected final byte maximumDesignatorLength = 4; |
| 45 | |
| 46 | protected String SODesignator, |
| 47 | SS2Designator = null, |
| 48 | SS3Designator = null; |
| 49 | |
| 50 | protected CharToByteConverter codeConverter; |
| 51 | |
| 52 | private boolean shiftout = false; |
| 53 | private boolean SODesDefined = false; |
| 54 | private boolean SS2DesDefined = false; |
| 55 | private boolean SS3DesDefined = false; |
| 56 | |
| 57 | private boolean newshiftout = false; |
| 58 | private boolean newSODesDefined = false; |
| 59 | private boolean newSS2DesDefined = false; |
| 60 | private boolean newSS3DesDefined = false; |
| 61 | |
| 62 | public int flush(byte[] output, int outStart, int outEnd) |
| 63 | throws MalformedInputException |
| 64 | { |
| 65 | reset(); |
| 66 | return 0; |
| 67 | } |
| 68 | |
| 69 | public void reset() { |
| 70 | shiftout = false; |
| 71 | SODesDefined = false; |
| 72 | SS2DesDefined = false; |
| 73 | SS3DesDefined = false; |
| 74 | byteOff = charOff = 0; |
| 75 | } |
| 76 | |
| 77 | public boolean canConvert(char ch) |
| 78 | { |
| 79 | if (ch<0x80) |
| 80 | return true; |
| 81 | return codeConverter.canConvert(ch); |
| 82 | } |
| 83 | |
| 84 | private int unicodeToNative(char unicode, byte ebyte[]) |
| 85 | { |
| 86 | int index = 0; |
| 87 | byte tmpByte[]; |
| 88 | byte convByte[] = new byte[codeConverter.getMaxBytesPerChar()]; |
| 89 | char convChar[] = {unicode}; |
| 90 | int converted; |
| 91 | |
| 92 | try{ |
| 93 | converted = codeConverter.convert(convChar, 0, 1, convByte, 0, |
| 94 | codeConverter.getMaxBytesPerChar()); |
| 95 | } catch(Exception e) { |
| 96 | return -1; |
| 97 | } |
| 98 | |
| 99 | if (converted == 2) { |
| 100 | if (!SODesDefined) { |
| 101 | newSODesDefined = true; |
| 102 | ebyte[0] = ISO_ESC; |
| 103 | tmpByte = SODesignator.getBytes(); |
| 104 | System.arraycopy(tmpByte,0,ebyte,1,tmpByte.length); |
| 105 | index = tmpByte.length+1; |
| 106 | } |
| 107 | if (!shiftout) { |
| 108 | newshiftout = true; |
| 109 | ebyte[index++] = ISO_SO; |
| 110 | } |
| 111 | ebyte[index++] = (byte)(convByte[0]&0x7f); |
| 112 | ebyte[index++] = (byte)(convByte[1]&0x7f); |
| 113 | } else { |
| 114 | if((convByte[0] == SS2)&&(convByte[1] == P2)) { |
| 115 | if (!SS2DesDefined) { |
| 116 | newSS2DesDefined = true; |
| 117 | ebyte[0] = ISO_ESC; |
| 118 | tmpByte = SS2Designator.getBytes(); |
| 119 | System.arraycopy(tmpByte,0,ebyte,1,tmpByte.length); |
| 120 | index = tmpByte.length+1; |
| 121 | } |
| 122 | ebyte[index++] = ISO_ESC; |
| 123 | ebyte[index++] = ISO_SS2_7; |
| 124 | ebyte[index++] = (byte)(convByte[2]&0x7f); |
| 125 | ebyte[index++] = (byte)(convByte[3]&0x7f); |
| 126 | } |
| 127 | if((convByte[0] == SS2)&&(convByte[1] == 0xA3)) |
| 128 | { |
| 129 | if(!SS3DesDefined){ |
| 130 | newSS3DesDefined = true; |
| 131 | ebyte[0] = ISO_ESC; |
| 132 | tmpByte = SS3Designator.getBytes(); |
| 133 | System.arraycopy(tmpByte,0,ebyte,1,tmpByte.length); |
| 134 | index = tmpByte.length+1; |
| 135 | } |
| 136 | ebyte[index++] = ISO_ESC; |
| 137 | ebyte[index++] = ISO_SS3_7; |
| 138 | ebyte[index++] = (byte)(convByte[2]&0x7f); |
| 139 | ebyte[index++] = (byte)(convByte[3]&0x7f); |
| 140 | } |
| 141 | } |
| 142 | return index; |
| 143 | } |
| 144 | |
| 145 | /** |
| 146 | * Character conversion |
| 147 | */ |
| 148 | public int convert(char[] input, int inOff, int inEnd, |
| 149 | byte[] output, int outOff, int outEnd) |
| 150 | throws UnknownCharacterException, MalformedInputException, |
| 151 | ConversionBufferFullException |
| 152 | { |
| 153 | int outputSize; |
| 154 | byte [] tmpbuf = new byte[this.getMaxBytesPerChar()]; |
| 155 | byte [] outputByte; |
| 156 | |
| 157 | byteOff = outOff; |
| 158 | |
| 159 | newshiftout = shiftout; |
| 160 | newSODesDefined = SODesDefined; |
| 161 | newSS2DesDefined = SS2DesDefined; |
| 162 | newSS3DesDefined = SS3DesDefined; |
| 163 | |
| 164 | //Fixed 4122961 by bringing the charOff++ out to this |
| 165 | // loop where it belongs, changing the loop from |
| 166 | // while(){} to for(){}. |
| 167 | for (charOff = inOff; charOff < inEnd; charOff++) { |
| 168 | outputByte = tmpbuf; |
| 169 | if (input[charOff] < 0x80) { // ASCII |
| 170 | if (shiftout){ |
| 171 | newshiftout = false; |
| 172 | outputSize = 2; |
| 173 | outputByte[0] = ISO_SI; |
| 174 | outputByte[1] = (byte)(input[charOff] & 0x7f); |
| 175 | } else { |
| 176 | outputSize = 1; |
| 177 | outputByte[0] = (byte)(input[charOff] & 0x7f); |
| 178 | } |
| 179 | if(input[charOff] == '\n'){ |
| 180 | newSODesDefined = false; |
| 181 | newSS2DesDefined = false; |
| 182 | newSS3DesDefined = false; |
| 183 | } |
| 184 | } else { |
| 185 | outputSize = unicodeToNative(input[charOff], outputByte); |
| 186 | } |
| 187 | |
| 188 | if (outputSize == -1) { |
| 189 | if (subMode) { |
| 190 | if(!newSODesDefined){ |
| 191 | newSODesDefined = !newSODesDefined; |
| 192 | outputByte[0] = ISO_SO; |
| 193 | outputByte[1] = (byte)'?'; |
| 194 | outputSize = 2; |
| 195 | } else { |
| 196 | outputByte = subBytes; |
| 197 | outputSize = subBytes.length; |
| 198 | } |
| 199 | } else { |
| 200 | badInputLength = 1; |
| 201 | throw new UnknownCharacterException(); |
| 202 | } |
| 203 | } |
| 204 | |
| 205 | if (outEnd - byteOff < outputSize) |
| 206 | throw new ConversionBufferFullException(); |
| 207 | |
| 208 | for (int i = 0; i < outputSize; i++) |
| 209 | output[byteOff++] = outputByte[i]; |
| 210 | |
| 211 | // Bug 4266772. Update statuses only when output buffer has been |
| 212 | // updated. When ConversionBufferFullException() has been throwed |
| 213 | // we want to keep old statuses for next call. |
| 214 | shiftout = newshiftout; |
| 215 | SODesDefined = newSODesDefined; |
| 216 | SS2DesDefined = newSS2DesDefined; |
| 217 | SS3DesDefined = newSS3DesDefined; |
| 218 | } |
| 219 | return byteOff - outOff; |
| 220 | } |
| 221 | } |