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| 1 | /* | ||
| 2 | * Copyright (c) 1997, 2000, Oracle and/or its affiliates. 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. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * 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 | } | ||