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Diffstat (limited to 'gcc-4.4.3/libjava/classpath/gnu/java/net/CRLFOutputStream.java')
| -rw-r--r-- | gcc-4.4.3/libjava/classpath/gnu/java/net/CRLFOutputStream.java | 183 |
1 files changed, 183 insertions, 0 deletions
diff --git a/gcc-4.4.3/libjava/classpath/gnu/java/net/CRLFOutputStream.java b/gcc-4.4.3/libjava/classpath/gnu/java/net/CRLFOutputStream.java new file mode 100644 index 000000000..f27e0f218 --- /dev/null +++ b/gcc-4.4.3/libjava/classpath/gnu/java/net/CRLFOutputStream.java @@ -0,0 +1,183 @@ +/* CRLFOutputStream.java -- + Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc. + +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 gnu.java.net; + +import java.io.FilterOutputStream; +import java.io.IOException; +import java.io.OutputStream; +import java.io.UnsupportedEncodingException; + +/** + * An output stream that filters LFs into CR/LF pairs. + * + * @author Chris Burdess (dog@gnu.org) + */ +public class CRLFOutputStream + extends FilterOutputStream +{ + static final String US_ASCII = "US-ASCII"; + + /** + * The CR octet. + */ + public static final int CR = 13; + + /** + * The LF octet. + */ + public static final int LF = 10; + + /** + * The CR/LF pair. + */ + public static final byte[] CRLF = { CR, LF }; + + /** + * The last byte read. + */ + protected int last; + + /** + * Constructs a CR/LF output stream connected to the specified output stream. + */ + public CRLFOutputStream(OutputStream out) + { + super(out); + last = -1; + } + + /** + * Writes a character to the underlying stream. + * @exception IOException if an I/O error occurred + */ + public void write(int ch) throws IOException + { + if (ch == CR) + { + out.write(CRLF); + } + else if (ch == LF) + { + if (last != CR) + { + out.write(CRLF); + } + } + else + { + out.write(ch); + } + last = ch; + } + + /** + * Writes a byte array to the underlying stream. + * @exception IOException if an I/O error occurred + */ + public void write(byte[] b) + throws IOException + { + write(b, 0, b.length); + } + + /** + * Writes a portion of a byte array to the underlying stream. + * @exception IOException if an I/O error occurred + */ + public void write(byte[] b, int off, int len) + throws IOException + { + int d = off; + len += off; + for (int i = off; i < len; i++) + { + switch (b[i]) + { + case CR: + out.write (b, d, i - d); + out.write (CRLF, 0, 2); + d = i + 1; + break; + case LF: + if (last != CR) + { + out.write (b, d, i - d); + out.write (CRLF, 0, 2); + } + d = i + 1; + break; + } + last = b[i]; + } + if (len - d > 0) + { + out.write (b, d, len - d); + } + } + + /** + * Writes the specified ASCII string to the underlying stream. + * @exception IOException if an I/O error occurred + */ + public void write(String text) + throws IOException + { + try + { + byte[] bytes = text.getBytes(US_ASCII); + write(bytes, 0, bytes.length); + } + catch (UnsupportedEncodingException e) + { + throw new IOException("The US-ASCII encoding is not supported " + + "on this system"); + } + } + + /** + * Writes a newline to the underlying stream. + * @exception IOException if an I/O error occurred + */ + public void writeln() + throws IOException + { + out.write(CRLF, 0, 2); + } +} + |