J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1996-2003 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 Limin Shi |
| 30 | */ |
| 31 | |
| 32 | public class ByteToCharEUC_JP extends ByteToCharJIS0208 { |
| 33 | private byte savedSecond = 0; |
| 34 | |
| 35 | ByteToCharJIS0201 bcJIS0201 = new ByteToCharJIS0201(); |
| 36 | ByteToCharJIS0212 bcJIS0212 = new ByteToCharJIS0212(); |
| 37 | |
| 38 | public ByteToCharEUC_JP() { |
| 39 | super(); |
| 40 | start = 0xA1; |
| 41 | end = 0xFE; |
| 42 | savedSecond = 0; |
| 43 | } |
| 44 | |
| 45 | public int flush(char[] output, int outStart, int outEnd) |
| 46 | throws MalformedInputException |
| 47 | { |
| 48 | if (savedSecond != 0) { |
| 49 | reset(); |
| 50 | throw new MalformedInputException(); |
| 51 | } |
| 52 | reset(); |
| 53 | return 0; |
| 54 | } |
| 55 | |
| 56 | /** |
| 57 | * Resets the converter. |
| 58 | * Call this method to reset the converter to its initial state |
| 59 | */ |
| 60 | public void reset() { |
| 61 | super.reset(); |
| 62 | savedSecond = 0; |
| 63 | } |
| 64 | |
| 65 | public String getCharacterEncoding() { |
| 66 | return "EUC_JP"; |
| 67 | } |
| 68 | |
| 69 | protected char convSingleByte(int b) { |
| 70 | if (b < 0 || b > 0x7F) |
| 71 | return REPLACE_CHAR; |
| 72 | return bcJIS0201.getUnicode(b); |
| 73 | } |
| 74 | |
| 75 | protected char getUnicode(int byte1, int byte2) { |
| 76 | if (byte1 == 0x8E) { |
| 77 | return bcJIS0201.getUnicode(byte2 - 256); |
| 78 | } |
| 79 | // Fix for bug 4121358 - similar fix for bug 4117820 put |
| 80 | // into ByteToCharDoubleByte.getUnicode() |
| 81 | if (((byte1 < 0) || (byte1 > index1.length)) |
| 82 | || ((byte2 < start) || (byte2 > end))) |
| 83 | return REPLACE_CHAR; |
| 84 | |
| 85 | int n = (index1[byte1 - 0x80] & 0xf) * (end - start + 1) |
| 86 | + (byte2 - start); |
| 87 | return index2[index1[byte1 - 0x80] >> 4].charAt(n); |
| 88 | } |
| 89 | |
| 90 | protected char decode0212(int byte1, int byte2) { |
| 91 | return bcJIS0212.getUnicode(byte1, byte2); |
| 92 | } |
| 93 | |
| 94 | /** |
| 95 | * Converts sequences of bytes to characters. |
| 96 | * Conversions that result in Exceptions can be restarted by calling |
| 97 | * convert again, with appropriately modified parameters. |
| 98 | * @return the characters written to output. |
| 99 | * @param input byte array containing text in Double/single Byte |
| 100 | * @param inStart offset in input array |
| 101 | * @param inEnd offset of last byte to be converted |
| 102 | * @param output character array to receive conversion result |
| 103 | * @param outStart starting offset |
| 104 | * @param outEnd offset of last byte to be written to |
| 105 | * @throw UnsupportedCharacterException for any bytes |
| 106 | * that cannot be converted to the external character set. |
| 107 | */ |
| 108 | public int convert(byte[] input, int inOff, int inEnd, |
| 109 | char[] output, int outOff, int outEnd) |
| 110 | throws UnknownCharacterException, |
| 111 | ConversionBufferFullException |
| 112 | { |
| 113 | char outputChar = REPLACE_CHAR; |
| 114 | int inputSize = 0; // Size of input |
| 115 | |
| 116 | // Record beginning offsets |
| 117 | charOff = outOff; |
| 118 | byteOff = inOff; |
| 119 | |
| 120 | // Loop until we hit the end of the input |
| 121 | while (byteOff < inEnd) { |
| 122 | int byte1, byte2; |
| 123 | |
| 124 | if (savedByte == 0) { |
| 125 | byte1 = input[byteOff]; |
| 126 | inputSize = 1; |
| 127 | } else { |
| 128 | byte1 = savedByte; |
| 129 | savedByte = 0; |
| 130 | inputSize = 0; |
| 131 | } |
| 132 | |
| 133 | outputChar = convSingleByte(byte1); |
| 134 | |
| 135 | if (outputChar == REPLACE_CHAR) { // Multibyte char |
| 136 | if ((byte1 & 0xff) == 0x8F) { // JIS0212 |
| 137 | if (byteOff + inputSize + 1 >= inEnd) { |
| 138 | // split in the middle of a character |
| 139 | // save the first 2 bytes for next time around |
| 140 | savedByte = (byte) byte1; |
| 141 | byteOff += inputSize; |
| 142 | if (byteOff < inEnd) { |
| 143 | savedSecond = input[byteOff]; |
| 144 | byteOff++; |
| 145 | } |
| 146 | break; |
| 147 | } |
| 148 | if (savedSecond != 0) { |
| 149 | byte1 = savedSecond & 0xff; |
| 150 | savedSecond = 0; |
| 151 | } else { |
| 152 | byte1 = input[byteOff + inputSize] & 0xff; |
| 153 | inputSize++; |
| 154 | } |
| 155 | byte2 = input[byteOff + inputSize] & 0xff; |
| 156 | inputSize++; |
| 157 | outputChar = decode0212(byte1-0x80, byte2-0x80); |
| 158 | } else { // JIS0208 |
| 159 | if (byteOff + inputSize >= inEnd) { |
| 160 | // split in the middle of a character |
| 161 | // save the first byte for next time around |
| 162 | savedByte = (byte) byte1; |
| 163 | byteOff += inputSize; |
| 164 | break; |
| 165 | } |
| 166 | byte1 &= 0xff; |
| 167 | byte2 = input[byteOff + inputSize] & 0xff; |
| 168 | inputSize++; |
| 169 | outputChar = getUnicode(byte1, byte2); |
| 170 | } |
| 171 | } |
| 172 | |
| 173 | if (outputChar == REPLACE_CHAR) { |
| 174 | if (subMode) |
| 175 | outputChar = subChars[0]; |
| 176 | else { |
| 177 | badInputLength = inputSize; |
| 178 | throw new UnknownCharacterException(); |
| 179 | } |
| 180 | } |
| 181 | |
| 182 | if (charOff >= outEnd) |
| 183 | throw new ConversionBufferFullException(); |
| 184 | |
| 185 | output[charOff++] = outputChar; |
| 186 | byteOff += inputSize; |
| 187 | } |
| 188 | |
| 189 | return charOff - outOff; |
| 190 | } |
| 191 | |
| 192 | } |