1.1 --- a/emul/compact/src/main/java/java/io/InputStreamReader.java Fri Mar 22 16:59:47 2013 +0100
1.2 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000
1.3 @@ -1,230 +0,0 @@
1.4 -/*
1.5 - * Copyright (c) 1996, 2005, Oracle and/or its affiliates. All rights reserved.
1.6 - * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 - *
1.8 - * This code is free software; you can redistribute it and/or modify it
1.9 - * under the terms of the GNU General Public License version 2 only, as
1.10 - * published by the Free Software Foundation. Oracle designates this
1.11 - * particular file as subject to the "Classpath" exception as provided
1.12 - * by Oracle in the LICENSE file that accompanied this code.
1.13 - *
1.14 - * This code is distributed in the hope that it will be useful, but WITHOUT
1.15 - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.16 - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.17 - * version 2 for more details (a copy is included in the LICENSE file that
1.18 - * accompanied this code).
1.19 - *
1.20 - * You should have received a copy of the GNU General Public License version
1.21 - * 2 along with this work; if not, write to the Free Software Foundation,
1.22 - * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.23 - *
1.24 - * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.25 - * or visit www.oracle.com if you need additional information or have any
1.26 - * questions.
1.27 - */
1.28 -
1.29 -package java.io;
1.30 -
1.31 -
1.32 -/**
1.33 - * An InputStreamReader is a bridge from byte streams to character streams: It
1.34 - * reads bytes and decodes them into characters using a specified {@link
1.35 - * java.nio.charset.Charset <code>charset</code>}. The charset that it uses
1.36 - * may be specified by name or may be given explicitly, or the platform's
1.37 - * default charset may be accepted.
1.38 - *
1.39 - * <p> Each invocation of one of an InputStreamReader's read() methods may
1.40 - * cause one or more bytes to be read from the underlying byte-input stream.
1.41 - * To enable the efficient conversion of bytes to characters, more bytes may
1.42 - * be read ahead from the underlying stream than are necessary to satisfy the
1.43 - * current read operation.
1.44 - *
1.45 - * <p> For top efficiency, consider wrapping an InputStreamReader within a
1.46 - * BufferedReader. For example:
1.47 - *
1.48 - * <pre>
1.49 - * BufferedReader in
1.50 - * = new BufferedReader(new InputStreamReader(System.in));
1.51 - * </pre>
1.52 - *
1.53 - * @see BufferedReader
1.54 - * @see InputStream
1.55 - * @see java.nio.charset.Charset
1.56 - *
1.57 - * @author Mark Reinhold
1.58 - * @since JDK1.1
1.59 - */
1.60 -
1.61 -public class InputStreamReader extends Reader {
1.62 -
1.63 - /**
1.64 - * Creates an InputStreamReader that uses the default charset.
1.65 - *
1.66 - * @param in An InputStream
1.67 - */
1.68 - public InputStreamReader(InputStream in) {
1.69 - super(in);
1.70 - }
1.71 -
1.72 - /**
1.73 - * Creates an InputStreamReader that uses the named charset.
1.74 - *
1.75 - * @param in
1.76 - * An InputStream
1.77 - *
1.78 - * @param charsetName
1.79 - * The name of a supported
1.80 - * {@link java.nio.charset.Charset </code>charset<code>}
1.81 - *
1.82 - * @exception UnsupportedEncodingException
1.83 - * If the named charset is not supported
1.84 - */
1.85 - public InputStreamReader(InputStream in, String charsetName)
1.86 - throws UnsupportedEncodingException
1.87 - {
1.88 - super(in);
1.89 - if (!charsetName.toUpperCase().equals("UTF-8")) {
1.90 - throw new UnsupportedEncodingException(charsetName);
1.91 - }
1.92 - }
1.93 -
1.94 - /**
1.95 - * Creates an InputStreamReader that uses the given charset. </p>
1.96 - *
1.97 - * @param in An InputStream
1.98 - * @param cs A charset
1.99 - *
1.100 - * @since 1.4
1.101 - * @spec JSR-51
1.102 - */
1.103 -/* XXX:
1.104 - public InputStreamReader(InputStream in, Charset cs) {
1.105 - super(in);
1.106 - if (cs == null)
1.107 - throw new NullPointerException("charset");
1.108 - sd = StreamDecoder.forInputStreamReader(in, this, cs);
1.109 - }
1.110 -*/
1.111 - /**
1.112 - * Creates an InputStreamReader that uses the given charset decoder. </p>
1.113 - *
1.114 - * @param in An InputStream
1.115 - * @param dec A charset decoder
1.116 - *
1.117 - * @since 1.4
1.118 - * @spec JSR-51
1.119 - */
1.120 -/* XXX:
1.121 - public InputStreamReader(InputStream in, CharsetDecoder dec) {
1.122 - super(in);
1.123 - if (dec == null)
1.124 - throw new NullPointerException("charset decoder");
1.125 - sd = StreamDecoder.forInputStreamReader(in, this, dec);
1.126 - }
1.127 -*/
1.128 -
1.129 - /**
1.130 - * Returns the name of the character encoding being used by this stream.
1.131 - *
1.132 - * <p> If the encoding has an historical name then that name is returned;
1.133 - * otherwise the encoding's canonical name is returned.
1.134 - *
1.135 - * <p> If this instance was created with the {@link
1.136 - * #InputStreamReader(InputStream, String)} constructor then the returned
1.137 - * name, being unique for the encoding, may differ from the name passed to
1.138 - * the constructor. This method will return <code>null</code> if the
1.139 - * stream has been closed.
1.140 - * </p>
1.141 - * @return The historical name of this encoding, or
1.142 - * <code>null</code> if the stream has been closed
1.143 - *
1.144 - * @see java.nio.charset.Charset
1.145 - *
1.146 - * @revised 1.4
1.147 - * @spec JSR-51
1.148 - */
1.149 - public String getEncoding() {
1.150 - return "UTF-8";
1.151 - }
1.152 -
1.153 - /**
1.154 - * Reads a single character.
1.155 - *
1.156 - * @return The character read, or -1 if the end of the stream has been
1.157 - * reached
1.158 - *
1.159 - * @exception IOException If an I/O error occurs
1.160 - */
1.161 - public int read() throws IOException {
1.162 - final InputStream is = (InputStream)lock;
1.163 - int c = is.read();
1.164 - if (c == -1) {
1.165 - return -1;
1.166 - }
1.167 - c = (int) c & 0xff;
1.168 - switch (c >> 4) {
1.169 - case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:
1.170 - /* 0xxxxxxx*/
1.171 - return c;
1.172 - case 12: case 13: {
1.173 - /* 110x xxxx 10xx xxxx*/
1.174 - int char2 = (int) is.read();
1.175 - if ((char2 & 0xC0) != 0x80)
1.176 - throw new UTFDataFormatException("malformed input");
1.177 - return (((c & 0x1F) << 6) | (char2 & 0x3F));
1.178 - }
1.179 - case 14: {
1.180 - /* 1110 xxxx 10xx xxxx 10xx xxxx */
1.181 - int char2 = is.read();
1.182 - int char3 = is.read();
1.183 - if (((char2 & 0xC0) != 0x80) || ((char3 & 0xC0) != 0x80))
1.184 - throw new UTFDataFormatException("malformed input");
1.185 - return (((c & 0x0F) << 12) |
1.186 - ((char2 & 0x3F) << 6) |
1.187 - ((char3 & 0x3F) << 0));
1.188 - }
1.189 - default:
1.190 - /* 10xx xxxx, 1111 xxxx */
1.191 - throw new UTFDataFormatException("malformed input");
1.192 - }
1.193 - }
1.194 -
1.195 - /**
1.196 - * Reads characters into a portion of an array.
1.197 - *
1.198 - * @param cbuf Destination buffer
1.199 - * @param offset Offset at which to start storing characters
1.200 - * @param length Maximum number of characters to read
1.201 - *
1.202 - * @return The number of characters read, or -1 if the end of the
1.203 - * stream has been reached
1.204 - *
1.205 - * @exception IOException If an I/O error occurs
1.206 - */
1.207 - public int read(char cbuf[], int offset, int length) throws IOException {
1.208 - for (int i = 0; i < length; i++) {
1.209 - int ch = read();
1.210 - if (ch == -1) {
1.211 - if (i == 0) return -1;
1.212 - return i;
1.213 - }
1.214 - cbuf[offset++] = (char) ch;
1.215 - }
1.216 - return length;
1.217 - }
1.218 -
1.219 - /**
1.220 - * Tells whether this stream is ready to be read. An InputStreamReader is
1.221 - * ready if its input buffer is not empty, or if bytes are available to be
1.222 - * read from the underlying byte stream.
1.223 - *
1.224 - * @exception IOException If an I/O error occurs
1.225 - */
1.226 - public boolean ready() throws IOException {
1.227 - return ((InputStream)lock).available() > 0;
1.228 - }
1.229 -
1.230 - public void close() throws IOException {
1.231 - ((InputStream)lock).close();
1.232 - }
1.233 -}