1 /* |
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2 * Copyright (c) 1996, 2010, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. Oracle designates this |
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8 * particular file as subject to the "Classpath" exception as provided |
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9 * by Oracle in the LICENSE file that accompanied this code. |
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10 * |
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11 * This code is distributed in the hope that it will be useful, but WITHOUT |
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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14 * version 2 for more details (a copy is included in the LICENSE file that |
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15 * accompanied this code). |
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16 * |
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17 * You should have received a copy of the GNU General Public License version |
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18 * 2 along with this work; if not, write to the Free Software Foundation, |
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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20 * |
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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22 * or visit www.oracle.com if you need additional information or have any |
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23 * questions. |
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24 */ |
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25 |
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26 package sun.io; |
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27 |
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28 public class ByteToCharISO2022JP extends ByteToCharJIS0208 { |
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29 |
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30 private static final int ASCII = 0; // ESC ( B |
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31 private static final int JISX0201_1976 = 1; // ESC ( J |
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32 private static final int JISX0208_1978 = 2; // ESC $ @ |
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33 private static final int JISX0208_1983 = 3; // ESC $ B |
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34 private static final int JISX0201_1976_KANA = 4; // ESC ( I |
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35 private static final int SHIFTOUT = 5; // SO (0x0e) |
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36 |
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37 private int currentState; |
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38 private int savedSize; |
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39 private byte[] savedBytes; |
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40 |
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41 public ByteToCharISO2022JP() { |
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42 super(); |
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43 savedBytes = new byte[2]; |
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44 currentState = ASCII; |
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45 savedSize = 0; |
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46 } |
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47 |
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48 public int flush(char [] output, int outStart, int outEnd) |
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49 throws MalformedInputException |
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50 { |
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51 if (savedSize != 0) { |
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52 savedSize = 0; |
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53 currentState = ASCII; |
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54 badInputLength = 0; |
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55 throw new MalformedInputException(); |
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56 } |
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57 byteOff = charOff = 0; |
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58 return 0; |
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59 } |
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60 |
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61 |
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62 /** |
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63 * Character conversion |
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64 */ |
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65 public int convert(byte[] input, int inOff, int inEnd, |
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66 char[] output, int outOff, int outEnd) |
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67 throws UnknownCharacterException, MalformedInputException, |
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68 ConversionBufferFullException |
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69 { |
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70 int previousState = ASCII; |
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71 int inputSize = 0; |
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72 char outputChar = '\uFFFD'; |
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73 // readOff keeps the actual buffer's pointer. |
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74 // byteOff keeps original buffer's pointer. |
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75 int readOff = byteOff = inOff; |
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76 |
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77 if (savedSize != 0) { |
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78 if (savedBytes[0] == 0x1b) { // ESC |
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79 if ((savedSize == 2 && |
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80 (savedBytes[1] == 0x28 && |
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81 input[0] != 'B' && |
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82 input[0] != 'J' && |
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83 input[0] != 'I') && |
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84 (savedBytes[1] == 0x24 && |
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85 input[0] != '@' && |
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86 input[0] != 'B')) || |
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87 ((savedSize == 1) && |
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88 (input[0] != 0x28 && |
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89 input[0] != 0x24))) { |
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90 badInputLength = 0; |
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91 throw new MalformedInputException(); |
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92 } |
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93 if ((inEnd - inOff) == 1 && savedSize == 1 && |
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94 savedBytes[0] == 0x1b) { |
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95 savedSize = 2; |
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96 savedBytes[1] = input[0]; |
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97 byteOff++; |
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98 return 0; |
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99 } |
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100 } |
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101 byte[] newBuf = new byte[inEnd - inOff + savedSize]; |
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102 for (int i = 0; i < savedSize; i++) { |
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103 newBuf[i] = savedBytes[i]; |
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104 } |
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105 System.arraycopy(input, inOff, newBuf, savedSize, inEnd - inOff); |
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106 byteOff -= savedSize; |
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107 input = newBuf; |
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108 inOff = 0; |
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109 inEnd = newBuf.length; |
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110 savedSize = 0; |
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111 } |
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112 |
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113 charOff = outOff; |
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114 readOff = inOff; |
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115 |
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116 while(readOff < inEnd) { |
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117 int byte1, byte2, byte3; |
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118 boolean noOutput = false; |
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119 |
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120 // Is there room in the output buffer for the result? |
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121 if (charOff >= outEnd) { |
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122 throw new ConversionBufferFullException(); |
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123 } |
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124 |
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125 // Get the input byte |
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126 byte1 = input[readOff] & 0xFF; |
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127 inputSize = 1; |
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128 |
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129 if ((byte1 & (byte)0x80) != 0){ |
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130 badInputLength = 1; |
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131 throw new MalformedInputException(); |
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132 } |
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133 |
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134 // Is this a escape sequence? |
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135 while (byte1 == 0x1b || byte1 == 0x0e || byte1 == 0x0f) { |
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136 if (byte1 == 0x1b){ // ESC |
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137 if (readOff + inputSize + 1 >= inEnd) { |
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138 if (readOff + inputSize >= inEnd) { |
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139 savedSize = 1; |
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140 savedBytes[0] = (byte)byte1; |
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141 } else { |
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142 savedSize = 2; |
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143 savedBytes[0] = (byte)byte1; |
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144 savedBytes[1] = input[readOff + inputSize]; |
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145 inputSize++; |
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146 } |
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147 break; |
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148 } |
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149 byte2 = input[readOff + inputSize] & 0xFF; |
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150 inputSize++; |
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151 if ((byte2 & (byte)0x80) != 0){ |
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152 badInputLength = 2; |
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153 throw new MalformedInputException(); |
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154 } |
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155 if (byte2 == 0x28){ |
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156 byte3 = input[readOff + inputSize] & 0xFF; |
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157 inputSize++; |
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158 if (byte3 == 'B'){ |
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159 currentState = ASCII; |
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160 } else if (byte3 == 'J'){ |
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161 currentState = JISX0201_1976; |
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162 } else if (byte3 == 'I'){ |
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163 currentState = JISX0201_1976_KANA; |
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164 } else { |
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165 // illegal ESC sequence |
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166 badInputLength = 3; |
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167 throw new MalformedInputException(); |
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168 } |
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169 } else if (byte2 == '$'){ |
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170 byte3 = input[readOff + inputSize] & 0xFF; |
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171 inputSize++; |
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172 if ((byte3 & (byte)0x80) != 0){ |
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173 badInputLength = 3; |
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174 throw new MalformedInputException(); |
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175 } |
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176 if (byte3 == '@'){ |
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177 currentState = JISX0208_1978; |
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178 } else if (byte3 == 'B'){ |
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179 currentState = JISX0208_1983; |
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180 } else { |
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181 // illegal ESC sequence |
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182 badInputLength = 3; |
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183 throw new MalformedInputException(); |
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184 } |
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185 } else { |
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186 // illegal ESC sequence |
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187 badInputLength = 2; |
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188 throw new MalformedInputException(); |
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189 } |
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190 if (readOff + inputSize >= inEnd) { |
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191 noOutput = true; |
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192 break; |
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193 } else { |
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194 byte1 = input[readOff + inputSize]; |
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195 inputSize++; |
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196 } |
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197 } else if (byte1 == 0x0e){ // shift out for one byte kana |
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198 previousState = currentState; |
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199 currentState = SHIFTOUT; |
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200 if (readOff + inputSize >= inEnd) { |
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201 noOutput = true; |
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202 break; |
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203 } |
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204 byte1 = input[readOff + inputSize]; |
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205 inputSize++; |
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206 if ((byte1 & (byte)0x80) != 0){ |
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207 badInputLength = 1; |
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208 throw new MalformedInputException(); |
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209 } |
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210 } else if (byte1 == 0x0f){ // shift in for previous mode |
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211 currentState = previousState; |
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212 if (readOff + inputSize >= inEnd) { |
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213 noOutput = true; |
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214 break; |
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215 } |
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216 byte1 = input[readOff + inputSize]; |
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217 inputSize++; |
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218 if ((byte1 & (byte)0x80) != 0){ |
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219 badInputLength = 1; |
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220 throw new MalformedInputException(); |
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221 } |
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222 } |
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223 } |
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224 if (noOutput || savedSize != 0) { |
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225 byteOff += inputSize; |
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226 break; |
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227 } |
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228 noOutput = false; |
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229 switch (currentState){ |
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230 case ASCII: |
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231 outputChar = (char)(byte1 & 0xff); |
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232 break; |
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233 case JISX0201_1976: |
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234 switch (byte1) { |
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235 case 0x5c: |
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236 outputChar = '\u00a5'; |
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237 break; |
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238 case 0x7e: |
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239 outputChar = '\u203e'; |
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240 break; |
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241 default: |
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242 outputChar = (char)byte1; |
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243 break; |
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244 } |
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245 break; |
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246 case JISX0208_1978: |
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247 case JISX0208_1983: |
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248 if (readOff + inputSize >= inEnd) { |
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249 savedSize = 1; |
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250 savedBytes[0] = (byte)byte1; |
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251 break; |
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252 } |
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253 byte2 = input[readOff + inputSize] & 0xff; |
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254 inputSize++; |
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255 if ((byte2 & (byte)0x80) != 0){ |
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256 badInputLength = 1; |
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257 throw new MalformedInputException(); |
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258 } |
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259 // jisx0208Chars table convert FULLWIDTH_REVERSE_SOLIDUS |
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260 // 0x2140 to REVERSE_SOLIDUS (BACKSLASH) 0x5c. |
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261 // This behavior causes problem because |
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262 // 0x5c is special escape character for java. |
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263 if (byte1 == 0x21 && byte2 == 0x40) { |
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264 outputChar = '\uFF3C'; |
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265 } else { |
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266 try { |
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267 outputChar = getUnicode(byte1, byte2); |
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268 } catch (ArrayIndexOutOfBoundsException e) { |
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269 outputChar = '\uFFFD'; |
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270 } |
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271 } |
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272 break; |
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273 case JISX0201_1976_KANA: |
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274 case SHIFTOUT: |
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275 if (byte1 > 0x60) { |
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276 badInputLength = 1; |
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277 throw new MalformedInputException(); |
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278 } |
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279 outputChar = (char)(byte1 + 0xff40); |
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280 break; |
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281 } |
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282 |
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283 if (savedSize != 0) { |
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284 byteOff += inputSize; |
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285 break; |
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286 } |
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287 |
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288 if (outputChar == '\uFFFD') { |
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289 if (subMode) |
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290 outputChar = subChars[0]; |
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291 else { |
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292 badInputLength = inputSize; |
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293 throw new UnknownCharacterException(); |
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294 } |
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295 } |
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296 readOff += inputSize; |
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297 byteOff += inputSize; |
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298 output[charOff++] = outputChar; |
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299 } |
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300 |
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301 return charOff - outOff; |
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302 } |
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303 |
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304 public void reset() { |
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305 byteOff = charOff = 0; |
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306 currentState = ASCII; |
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307 savedSize = 0; |
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308 } |
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309 |
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310 public String getCharacterEncoding() { |
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311 return "ISO2022JP"; |
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312 } |
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313 } |
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