+++ /dev/null
-/* StringReader.java -- permits a String to be read as a character input stream
- Copyright (C) 1998, 1999, 2000 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., 59 Temple Place, Suite 330, Boston, MA
-02111-1307 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>.
- *
- * @version 0.0
- *
- * @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 s 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 num_chars 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;
- }
- }
-}
projects / msp430-gcc.git / blobdiff