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| 1 | /* | ||
| 2 | * Copyright (c) 1996, 1998, 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 | package sun.io; | ||
| 26 | |||
| 27 | public class CharToByteISO8859_1 extends CharToByteConverter { | ||
| 28 | |||
| 29 | // Return the character set ID | ||
| 30 | public String getCharacterEncoding() | ||
| 31 | { | ||
| 32 | return "ISO8859_1"; | ||
| 33 | } | ||
| 34 | |||
| 35 | private char highHalfZoneCode; | ||
| 36 | |||
| 37 | public int flush(byte[] output, int outStart, int outEnd) | ||
| 38 | throws MalformedInputException | ||
| 39 | { | ||
| 40 | if (highHalfZoneCode != 0) { | ||
| 41 | highHalfZoneCode = 0; | ||
| 42 | throw new MalformedInputException | ||
| 43 | ("String ends with <High Half Zone code> of UTF16"); | ||
| 44 | } | ||
| 45 | byteOff = charOff = 0; | ||
| 46 | return 0; | ||
| 47 | } | ||
| 48 | |||
| 49 | /* | ||
| 50 | * Character conversion | ||
| 51 | */ | ||
| 52 | public int convert(char[] input, int inOff, int inEnd, | ||
| 53 | byte[] output, int outOff, int outEnd) | ||
| 54 | throws MalformedInputException, | ||
| 55 | UnknownCharacterException, | ||
| 56 | ConversionBufferFullException | ||
| 57 | |||
| 58 | { | ||
| 59 | |||
| 60 | char inputChar; // Input character to be converted | ||
| 61 | byte[] outputByte; // Output byte written to output | ||
| 62 | byte[] tmpArray = new byte[1]; | ||
| 63 | int inputSize; // Size of input | ||
| 64 | int outputSize; // Size of output | ||
| 65 | |||
| 66 | // Record beginning offsets | ||
| 67 | charOff = inOff; | ||
| 68 | byteOff = outOff; | ||
| 69 | |||
| 70 | if (highHalfZoneCode != 0) { | ||
| 71 | inputChar = highHalfZoneCode; | ||
| 72 | highHalfZoneCode = 0; | ||
| 73 | if (input[inOff] >= 0xdc00 && input[inOff] <= 0xdfff) { | ||
| 74 | // This is legal UTF16 sequence. | ||
| 75 | if (subMode) { | ||
| 76 | outputSize = subBytes.length; | ||
| 77 | if (byteOff + outputSize > outEnd) | ||
| 78 | throw new ConversionBufferFullException(); | ||
| 79 | for(int i = 0; i < outputSize; i++) | ||
| 80 | output[byteOff++] = subBytes[i]; | ||
| 81 | charOff += 1; | ||
| 82 | } else { | ||
| 83 | badInputLength = 1; | ||
| 84 | throw new UnknownCharacterException(); | ||
| 85 | } | ||
| 86 | } else { | ||
| 87 | // This is illegal UTF16 sequence. | ||
| 88 | badInputLength = 0; | ||
| 89 | throw new MalformedInputException | ||
| 90 | ("Previous converted string ends with " + | ||
| 91 | "<High Half Zone Code> of UTF16 " + | ||
| 92 | ", but this string is not begin with <Low Half Zone>"); | ||
| 93 | } | ||
| 94 | } | ||
| 95 | |||
| 96 | // Loop until we hit the end of the input | ||
| 97 | while(charOff < inEnd) { | ||
| 98 | outputByte = tmpArray; | ||
| 99 | |||
| 100 | // Get the input character | ||
| 101 | inputChar = input[charOff]; | ||
| 102 | |||
| 103 | // default outputSize | ||
| 104 | outputSize = 1; | ||
| 105 | |||
| 106 | // Assume this is a simple character | ||
| 107 | inputSize = 1; | ||
| 108 | |||
| 109 | // Is this a high surrogate? | ||
| 110 | if(inputChar >= '\uD800' && inputChar <= '\uDBFF') { | ||
| 111 | // Is this the last character in the input? | ||
| 112 | if (charOff + 1 == inEnd) { | ||
| 113 | highHalfZoneCode = inputChar; | ||
| 114 | break; | ||
| 115 | } | ||
| 116 | |||
| 117 | // Is there a low surrogate following? | ||
| 118 | inputChar = input[charOff + 1]; | ||
| 119 | if (inputChar >= '\uDC00' && inputChar <= '\uDFFF') { | ||
| 120 | // We have a valid surrogate pair. Too bad we don't map | ||
| 121 | // surrogates. Is substitution enabled? | ||
| 122 | if (subMode) { | ||
| 123 | outputByte = subBytes; | ||
| 124 | outputSize = subBytes.length; | ||
| 125 | inputSize = 2; | ||
| 126 | } else { | ||
| 127 | badInputLength = 2; | ||
| 128 | throw new UnknownCharacterException(); | ||
| 129 | } | ||
| 130 | } else { | ||
| 131 | // We have a malformed surrogate pair | ||
| 132 | badInputLength = 1; | ||
| 133 | throw new MalformedInputException(); | ||
| 134 | } | ||
| 135 | } | ||
| 136 | // Is this an unaccompanied low surrogate? | ||
| 137 | else if (inputChar >= '\uDC00' && inputChar <= '\uDFFF') { | ||
| 138 | badInputLength = 1; | ||
| 139 | throw new MalformedInputException(); | ||
| 140 | } | ||
| 141 | // Not part of a surrogate, so try to convert | ||
| 142 | else { | ||
| 143 | // Is this character mappable? | ||
| 144 | if (inputChar <= '\u00FF') { | ||
| 145 | outputByte[0] = (byte)inputChar; | ||
| 146 | } else { | ||
| 147 | // Is substitution enabled? | ||
| 148 | if (subMode) { | ||
| 149 | outputByte = subBytes; | ||
| 150 | outputSize = subBytes.length; | ||
| 151 | } else { | ||
| 152 | badInputLength = 1; | ||
| 153 | throw new UnknownCharacterException(); | ||
| 154 | } | ||
| 155 | } | ||
| 156 | } | ||
| 157 | |||
| 158 | // If we don't have room for the output, throw an exception | ||
| 159 | if (byteOff + outputSize > outEnd) | ||
| 160 | throw new ConversionBufferFullException(); | ||
| 161 | |||
| 162 | // Put the byte in the output buffer | ||
| 163 | for (int i = 0; i < outputSize; i++) { | ||
| 164 | output[byteOff++] = outputByte[i]; | ||
| 165 | } | ||
| 166 | charOff += inputSize; | ||
| 167 | } | ||
| 168 | |||
| 169 | // Return the length written to the output buffer | ||
| 170 | return byteOff-outOff; | ||
| 171 | } | ||
| 172 | |||
| 173 | // Determine if a character is mappable or not | ||
| 174 | public boolean canConvert(char ch) | ||
| 175 | { | ||
| 176 | return (ch <= '\u00FF'); | ||
| 177 | } | ||
| 178 | |||
| 179 | // Reset the converter | ||
| 180 | public void reset() | ||
| 181 | { | ||
| 182 | byteOff = charOff = 0; | ||
| 183 | highHalfZoneCode = 0; | ||
| 184 | } | ||
| 185 | |||
| 186 | /** | ||
| 187 | * returns the maximum number of bytes needed to convert a char | ||
| 188 | */ | ||
| 189 | public int getMaxBytesPerChar() | ||
| 190 | { | ||
| 191 | return 1; | ||
| 192 | } | ||
| 193 | |||
| 194 | |||
| 195 | } | ||