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Diffstat (limited to 'libjava/java/io/StringReader.java')
| -rw-r--r-- | libjava/java/io/StringReader.java | 209 |
1 files changed, 0 insertions, 209 deletions
diff --git a/libjava/java/io/StringReader.java b/libjava/java/io/StringReader.java deleted file mode 100644 index 7e4e7d8..0000000 --- a/libjava/java/io/StringReader.java +++ /dev/null @@ -1,209 +0,0 @@ -/* StringReader.java -- permits a String to be read as a character input stream - Copyright (C) 1998, 1999, 2000, 2003 Free Software Foundation - -This file is part of GNU Classpath. - -GNU Classpath is free software; you can redistribute it and/or modify -it under the terms of the GNU General Public License as published by -the Free Software Foundation; either version 2, or (at your option) -any later version. - -GNU Classpath is distributed in the hope that it will be useful, but -WITHOUT ANY WARRANTY; without even the implied warranty of -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU -General Public License for more details. - -You should have received a copy of the GNU General Public License -along with GNU Classpath; see the file COPYING. If not, write to the -Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA -02110-1301 USA. - -Linking this library statically or dynamically with other modules is -making a combined work based on this library. Thus, the terms and -conditions of the GNU General Public License cover the whole -combination. - -As a special exception, the copyright holders of this library give you -permission to link this library with independent modules to produce an -executable, regardless of the license terms of these independent -modules, and to copy and distribute the resulting executable under -terms of your choice, provided that you also meet, for each linked -independent module, the terms and conditions of the license of that -module. An independent module is a module which is not derived from -or based on this library. If you modify this library, you may extend -this exception to your version of the library, but you are not -obligated to do so. If you do not wish to do so, delete this -exception statement from your version. */ - -package java.io; - -/* Written using "Java Class Libraries", 2nd edition, ISBN 0-201-31002-3 - * "The Java Language Specification", ISBN 0-201-63451-1 - * plus online API docs for JDK 1.2 beta from http://www.javasoft.com. - * Status: Believed complete and correct - */ - -/** - * This class permits a <code>String</code> to be read as a character - * input stream. - * <p> - * The mark/reset functionality in this class behaves differently than - * normal. If no mark has been set, then calling the <code>reset()</code> - * method rewinds the read pointer to the beginning of the <code>String</code>. - * - * @author Aaron M. Renn (arenn@urbanophile.com) - * @author Warren Levy (warrenl@cygnus.com) - * @date October 19, 1998. - */ -public class StringReader extends Reader -{ - /* A String provided by the creator of the stream. */ - private String buf; - - /* Position of the next char in buf to be read. */ - private int pos; - - /* The currently marked position in the stream. */ - private int markedPos; - - /* The index in buf one greater than the last valid character. */ - private int count; - - /** - * Create a new <code>StringReader</code> that will read chars from the - * passed in <code>String</code>. This stream will read from the beginning - * to the end of the <code>String</code>. - * - * @param buffer The <code>String</code> this stream will read from. - */ - public StringReader(String buffer) - { - super(); - buf = buffer; - - count = buffer.length(); - markedPos = pos = 0; - } - - public void close() - { - synchronized (lock) - { - buf = null; - } - } - - public void mark(int readAheadLimit) throws IOException - { - synchronized (lock) - { - if (buf == null) - throw new IOException("Stream closed"); - - // readAheadLimit is ignored per Java Class Lib. book, p. 1692. - markedPos = pos; - } - } - - public boolean markSupported() - { - return true; - } - - public int read() throws IOException - { - synchronized (lock) - { - if (buf == null) - throw new IOException("Stream closed"); - - if (pos < count) - return ((int) buf.charAt(pos++)) & 0xFFFF; - return -1; - } - } - - public int read(char[] b, int off, int len) throws IOException - { - synchronized (lock) - { - if (buf == null) - throw new IOException("Stream closed"); - - /* Don't need to check pos value, arraycopy will check it. */ - if (off < 0 || len < 0 || off + len > b.length) - throw new ArrayIndexOutOfBoundsException(); - - if (pos >= count) - return -1; - - int lastChar = Math.min(count, pos + len); - buf.getChars(pos, lastChar, b, off); - int numChars = lastChar - pos; - pos = lastChar; - return numChars; - } - } - - /** - * This method determines if the stream is ready to be read. This class - * is always ready to read and so always returns <code>true</code>, unless - * close() has previously been called in which case an IOException is - * thrown. - * - * @return <code>true</code> to indicate that this object is ready to be read. - * @exception IOException If the stream is closed. - */ - public boolean ready() throws IOException - { - if (buf == null) - throw new IOException("Stream closed"); - - return true; - } - - /** - * Sets the read position in the stream to the previously - * marked position or to 0 (i.e., the beginning of the stream) if the mark - * has not already been set. - */ - public void reset() throws IOException - { - synchronized (lock) - { - if (buf == null) - throw new IOException("Stream closed"); - - pos = markedPos; - } - } - - /** - * This method attempts to skip the requested number of chars in the - * input stream. It does this by advancing the <code>pos</code> value by - * the specified number of chars. It this would exceed the length of the - * buffer, then only enough chars are skipped to position the stream at - * the end of the buffer. The actual number of chars skipped is returned. - * - * @param n The requested number of chars to skip - * - * @return The actual number of chars skipped. - */ - public long skip(long n) throws IOException - { - synchronized (lock) - { - if (buf == null) - throw new IOException("Stream closed"); - - // Even though the var numChars is a long, in reality it can never - // be larger than an int since the result of subtracting 2 positive - // ints will always fit in an int. Since we have to return a long - // anyway, numChars might as well just be a long. - long numChars = Math.min((long) (count - pos), n < 0 ? 0L : n); - pos += numChars; - return numChars; - } - } -} - |