Showing the changes to java/pkg/sun/io/CharToByteUnicode.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 | + | |
| 26 | +package sun.io; | |
| 27 | +import java.io.*; | |
| 28 | + | |
| 29 | + | |
| 30 | +/** | |
| 31 | + * Convert arrays containing Unicode characters into arrays of bytes, using the | |
| 32 | + * platform-default byte order. | |
| 33 | + * | |
| 34 | + * @author Mark Reinhold | |
| 35 | + */ | |
| 36 | + | |
| 37 | +public class CharToByteUnicode extends CharToByteConverter { | |
| 38 | + | |
| 39 | + static final char BYTE_ORDER_MARK = (char) 0xfeff; | |
| 40 | + protected boolean usesMark = true; /* A mark should be written */ | |
| 41 | + private boolean markWritten = false; /* A mark has been written */ | |
| 42 | + | |
| 43 | + static final int UNKNOWN = 0; | |
| 44 | + static final int BIG = 1; | |
| 45 | + static final int LITTLE = 2; | |
| 46 | + protected int byteOrder = UNKNOWN; | |
| 47 | + | |
| 48 | + public CharToByteUnicode() { | |
| 49 | + String enc = java.security.AccessController.doPrivileged( | |
| 50 | + new sun.security.action.GetPropertyAction("sun.io.unicode.encoding", | |
| 51 | + "UnicodeBig")); | |
| 52 | + if (enc.equals("UnicodeBig")) | |
| 53 | + byteOrder = BIG; | |
| 54 | + else if (enc.equals("UnicodeLittle")) | |
| 55 | + byteOrder = LITTLE; | |
| 56 | + else | |
| 57 | + byteOrder = BIG; | |
| 58 | + } | |
| 59 | + | |
| 60 | + public CharToByteUnicode(int byteOrder, boolean usesMark) { | |
| 61 | + this.byteOrder = byteOrder; | |
| 62 | + this.usesMark = usesMark; | |
| 63 | + } | |
| 64 | + | |
| 65 | + public CharToByteUnicode(boolean usesMark) { | |
| 66 | + this(); | |
| 67 | + this.usesMark = usesMark; | |
| 68 | + } | |
| 69 | + | |
| 70 | + public String getCharacterEncoding() { | |
| 71 | + switch (byteOrder) { | |
| 72 | + case BIG: | |
| 73 | + return usesMark ? "UnicodeBig" : "UnicodeBigUnmarked"; | |
| 74 | + case LITTLE: | |
| 75 | + return usesMark ? "UnicodeLittle" : "UnicodeLittleUnmarked"; | |
| 76 | + default: | |
| 77 | + return "UnicodeUnknown"; | |
| 78 | + } | |
| 79 | + } | |
| 80 | + | |
| 81 | + public int convert(char in[], int inOff, int inEnd, | |
| 82 | + byte out[], int outOff, int outEnd) | |
| 83 | + throws ConversionBufferFullException, MalformedInputException | |
| 84 | + { | |
| 85 | + charOff = inOff; | |
| 86 | + byteOff = outOff; | |
| 87 | + | |
| 88 | + if (inOff >= inEnd) | |
| 89 | + return 0; | |
| 90 | + | |
| 91 | + int inI = inOff, | |
| 92 | + outI = outOff, | |
| 93 | + outTop = outEnd - 2; | |
| 94 | + | |
| 95 | + if (usesMark && !markWritten) { | |
| 96 | + if (outI > outTop) | |
| 97 | + throw new ConversionBufferFullException(); | |
| 98 | + if (byteOrder == BIG) { | |
| 99 | + out[outI++] = (byte) (BYTE_ORDER_MARK >> 8); | |
| 100 | + out[outI++] = (byte) (BYTE_ORDER_MARK & 0xff); | |
| 101 | + } | |
| 102 | + else { | |
| 103 | + out[outI++] = (byte) (BYTE_ORDER_MARK & 0xff); | |
| 104 | + out[outI++] = (byte) (BYTE_ORDER_MARK >> 8); | |
| 105 | + } | |
| 106 | + markWritten = true; | |
| 107 | + } | |
| 108 | + | |
| 109 | + if (byteOrder == BIG) { | |
| 110 | + while (inI < inEnd) { | |
| 111 | + if (outI > outTop) { | |
| 112 | + charOff = inI; | |
| 113 | + byteOff = outI; | |
| 114 | + throw new ConversionBufferFullException(); | |
| 115 | + } | |
| 116 | + char c = in[inI++]; | |
| 117 | + out[outI++] = (byte) (c >> 8); | |
| 118 | + out[outI++] = (byte) (c & 0xff); | |
| 119 | + } | |
| 120 | + } | |
| 121 | + else { | |
| 122 | + while (inI < inEnd) { | |
| 123 | + if (outI > outTop) { | |
| 124 | + charOff = inI; | |
| 125 | + byteOff = outI; | |
| 126 | + throw new ConversionBufferFullException(); | |
| 127 | + } | |
| 128 | + char c = in[inI++]; | |
| 129 | + out[outI++] = (byte) (c & 0xff); | |
| 130 | + out[outI++] = (byte) (c >> 8); | |
| 131 | + } | |
| 132 | + } | |
| 133 | + | |
| 134 | + charOff = inI; | |
| 135 | + byteOff = outI; | |
| 136 | + return outI - outOff; | |
| 137 | + } | |
| 138 | + | |
| 139 | + public int flush(byte in[], int inOff, int inEnd) { | |
| 140 | + byteOff = charOff = 0; | |
| 141 | + return 0; | |
| 142 | + } | |
| 143 | + | |
| 144 | + public void reset () { | |
| 145 | + byteOff = charOff = 0; | |
| 146 | + markWritten = false; | |
| 147 | + } | |
| 148 | + | |
| 149 | + public int getMaxBytesPerChar() { | |
| 150 | + return 4; /* To allow for writing the byte-order mark */ | |
| 151 | + } | |
| 152 | + | |
| 153 | +} | |