123 lines
2.3 KiB
Java
123 lines
2.3 KiB
Java
// CharArrayWriter.java - Character array output stream.
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/* Copyright (C) 1998, 1999 Cygnus Solutions
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This file is part of libgcj.
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This software is copyrighted work licensed under the terms of the
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Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
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details. */
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package java.io;
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/**
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* @author Tom Tromey <tromey@cygnus.com>
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* @date September 25, 1998
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*/
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/* Written using "Java Class Libraries", 2nd edition, ISBN 0-201-31002-3
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* "The Java Language Specification", ISBN 0-201-63451-1
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* Status: Complete to 1.1.
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*/
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public class CharArrayWriter extends Writer
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{
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public CharArrayWriter ()
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{
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this (32);
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}
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public CharArrayWriter (int size)
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{
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super ();
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buf = new char[size];
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}
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public void close ()
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{
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// JCL says this does nothing. This seems to violate the Writer
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// contract, in that other methods should still throw and
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// IOException after a close. Still, we just follow JCL.
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}
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public void flush ()
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{
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}
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public synchronized void reset ()
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{
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count = 0;
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}
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public int size ()
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{
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return count;
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}
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public char[] toCharArray ()
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{
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char[] nc = new char[count];
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System.arraycopy(buf, 0, nc, 0, count);
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return nc;
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}
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public String toString ()
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{
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return new String (buf, 0, count);
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}
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public void write (int oneChar)
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{
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synchronized (lock)
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{
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resize (1);
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buf[count++] = (char) oneChar;
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}
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}
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public void write (char[] buffer, int offset, int len)
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{
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synchronized (lock)
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{
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if (len >= 0)
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resize (len);
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System.arraycopy(buffer, offset, buf, count, len);
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count += len;
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}
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}
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public void write (String str, int offset, int len)
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{
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synchronized (lock)
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{
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if (len >= 0)
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resize (len);
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str.getChars(offset, offset + len, buf, count);
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count += len;
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}
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}
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public void writeTo (Writer out) throws IOException
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{
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out.write(buf, 0, count);
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}
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private final void resize (int len)
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{
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if (count + len >= buf.length)
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{
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int newlen = buf.length * 2;
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if (count + len > newlen)
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newlen = count + len;
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char[] newbuf = new char[newlen];
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System.arraycopy(buf, 0, newbuf, 0, count);
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buf = newbuf;
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}
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}
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// The character buffer.
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protected char[] buf;
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// Number of valid characters in buffer.
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protected int count;
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}
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