Showing the changes to java/pkg/sun/io/ByteToCharUTF8.java (1 of 18352 files). Show all
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| 1 | +/* | |
| 2 | + * Copyright (c) 1996, 2010, 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 | + | |
| 28 | +/** | |
| 29 | + * UCS Transformation Format 8 (UTF-8) -> UCS2 (UTF16) converter | |
| 30 | + * | |
| 31 | + * see CharToByteUTF8.java about UTF-8 format | |
| 32 | + */ | |
| 33 | + | |
| 34 | +public class ByteToCharUTF8 extends ByteToCharConverter { | |
| 35 | + | |
| 36 | + private int savedSize; | |
| 37 | + private byte[] savedBytes; | |
| 38 | + | |
| 39 | + public ByteToCharUTF8() { | |
| 40 | + super(); | |
| 41 | + savedSize = 0; | |
| 42 | + savedBytes = new byte[5]; | |
| 43 | + } | |
| 44 | + | |
| 45 | + public int flush(char[] output, int outStart, int outEnd) | |
| 46 | + throws MalformedInputException | |
| 47 | + { | |
| 48 | + if (savedSize != 0) { | |
| 49 | + savedSize = 0; | |
| 50 | + badInputLength = 0; | |
| 51 | + throw new MalformedInputException(); | |
| 52 | + } | |
| 53 | + byteOff = charOff = 0; | |
| 54 | + return 0; | |
| 55 | + } | |
| 56 | + | |
| 57 | + /** | |
| 58 | + * Character converson | |
| 59 | + */ | |
| 60 | + public int convert(byte[] input, int inOff, int inEnd, | |
| 61 | + char[] output, int outOff, int outEnd) | |
| 62 | + throws MalformedInputException, ConversionBufferFullException | |
| 63 | + { | |
| 64 | + int byte1, byte2, byte3, byte4; | |
| 65 | + char[] outputChar = new char[2]; | |
| 66 | + int outputSize; | |
| 67 | + int byteOffAdjustment = 0; | |
| 68 | + | |
| 69 | + if (savedSize != 0) { | |
| 70 | + byte[] newBuf; | |
| 71 | + newBuf = new byte[inEnd - inOff + savedSize]; | |
| 72 | + for (int i = 0; i < savedSize; i++) { | |
| 73 | + newBuf[i] = savedBytes[i]; | |
| 74 | + } | |
| 75 | + System.arraycopy(input, inOff, newBuf, savedSize, inEnd - inOff); | |
| 76 | + input = newBuf; | |
| 77 | + inOff = 0; | |
| 78 | + inEnd = newBuf.length; | |
| 79 | + byteOffAdjustment = -savedSize; | |
| 80 | + savedSize = 0; | |
| 81 | + } | |
| 82 | + | |
| 83 | + charOff = outOff; | |
| 84 | + byteOff = inOff; | |
| 85 | + int startByteOff; | |
| 86 | + | |
| 87 | + while(byteOff < inEnd) { | |
| 88 | + | |
| 89 | + startByteOff = byteOff; | |
| 90 | + byte1 = input[byteOff++] & 0xff; | |
| 91 | + | |
| 92 | + if ((byte1 & 0x80) == 0){ | |
| 93 | + outputChar[0] = (char)byte1; | |
| 94 | + outputSize = 1; | |
| 95 | + } else if ((byte1 & 0xe0) == 0xc0) { | |
| 96 | + if (byteOff >= inEnd) { | |
| 97 | + savedSize = 1; | |
| 98 | + savedBytes[0] = (byte)byte1; | |
| 99 | + break; | |
| 100 | + } | |
| 101 | + byte2 = input[byteOff++] & 0xff; | |
| 102 | + if ((byte2 & 0xc0) != 0x80) { | |
| 103 | + badInputLength = 2; | |
| 104 | + byteOff += byteOffAdjustment; | |
| 105 | + throw new MalformedInputException(); | |
| 106 | + } | |
| 107 | + outputChar[0] = (char)(((byte1 & 0x1f) << 6) | (byte2 & 0x3f)); | |
| 108 | + outputSize = 1; | |
| 109 | + } else if ((byte1 & 0xf0) == 0xe0){ | |
| 110 | + if (byteOff + 1 >= inEnd) { | |
| 111 | + savedBytes[0] = (byte)byte1; | |
| 112 | + if (byteOff >= inEnd) { | |
| 113 | + savedSize = 1; | |
| 114 | + } else { | |
| 115 | + savedSize = 2; | |
| 116 | + savedBytes[1] = input[byteOff++]; | |
| 117 | + } | |
| 118 | + break; | |
| 119 | + } | |
| 120 | + byte2 = input[byteOff++] & 0xff; | |
| 121 | + byte3 = input[byteOff++] & 0xff; | |
| 122 | + if ((byte2 & 0xc0) != 0x80 || (byte3 & 0xc0) != 0x80) { | |
| 123 | + badInputLength = 3; | |
| 124 | + byteOff += byteOffAdjustment; | |
| 125 | + throw new MalformedInputException(); | |
| 126 | + } | |
| 127 | + outputChar[0] = (char)(((byte1 & 0x0f) << 12) | |
| 128 | + | ((byte2 & 0x3f) << 6) | |
| 129 | + | (byte3 & 0x3f)); | |
| 130 | + outputSize = 1; | |
| 131 | + } else if ((byte1 & 0xf8) == 0xf0) { | |
| 132 | + if (byteOff + 2 >= inEnd) { | |
| 133 | + savedBytes[0] = (byte)byte1; | |
| 134 | + if (byteOff >= inEnd) { | |
| 135 | + savedSize = 1; | |
| 136 | + } else if (byteOff + 1 >= inEnd) { | |
| 137 | + savedSize = 2; | |
| 138 | + savedBytes[1] = input[byteOff++]; | |
| 139 | + } else { | |
| 140 | + savedSize = 3; | |
| 141 | + savedBytes[1] = input[byteOff++]; | |
| 142 | + savedBytes[2] = input[byteOff++]; | |
| 143 | + } | |
| 144 | + break; | |
| 145 | + } | |
| 146 | + byte2 = input[byteOff++] & 0xff; | |
| 147 | + byte3 = input[byteOff++] & 0xff; | |
| 148 | + byte4 = input[byteOff++] & 0xff; | |
| 149 | + if ((byte2 & 0xc0) != 0x80 || | |
| 150 | + (byte3 & 0xc0) != 0x80 || | |
| 151 | + (byte4 & 0xc0) != 0x80) { | |
| 152 | + badInputLength = 4; | |
| 153 | + byteOff += byteOffAdjustment; | |
| 154 | + throw new MalformedInputException(); | |
| 155 | + } | |
| 156 | + // this byte sequence is UTF16 character | |
| 157 | + int ucs4 = (0x07 & byte1) << 18 | | |
| 158 | + (0x3f & byte2) << 12 | | |
| 159 | + (0x3f & byte3) << 6 | | |
| 160 | + (0x3f & byte4); | |
| 161 | + outputChar[0] = (char)((ucs4 - 0x10000) / 0x400 + 0xd800); | |
| 162 | + outputChar[1] = (char)((ucs4 - 0x10000) % 0x400 + 0xdc00); | |
| 163 | + outputSize = 2; | |
| 164 | + } else { | |
| 165 | + badInputLength = 1; | |
| 166 | + byteOff += byteOffAdjustment; | |
| 167 | + throw new MalformedInputException(); | |
| 168 | + } | |
| 169 | + | |
| 170 | + if (charOff + outputSize > outEnd) { | |
| 171 | + byteOff = startByteOff; | |
| 172 | + byteOff += byteOffAdjustment; | |
| 173 | + throw new ConversionBufferFullException(); | |
| 174 | + } | |
| 175 | + | |
| 176 | + for (int i = 0; i < outputSize; i++) { | |
| 177 | + output[charOff + i] = outputChar[i]; | |
| 178 | + } | |
| 179 | + charOff += outputSize; | |
| 180 | + } | |
| 181 | + | |
| 182 | + byteOff += byteOffAdjustment; | |
| 183 | + return charOff - outOff; | |
| 184 | + } | |
| 185 | + | |
| 186 | + /* | |
| 187 | + * Return the character set id | |
| 188 | + */ | |
| 189 | + public String getCharacterEncoding() { | |
| 190 | + return "UTF8"; | |
| 191 | + } | |
| 192 | + | |
| 193 | + /* | |
| 194 | + * Reset after finding bad input | |
| 195 | + */ | |
| 196 | + public void reset() { | |
| 197 | + byteOff = charOff = 0; | |
| 198 | + savedSize = 0; | |
| 199 | + } | |
| 200 | +} | |