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Diffstat (limited to 'libjava/classpath/gnu/CORBA/CDR/aligningOutputStream.java')
-rw-r--r-- | libjava/classpath/gnu/CORBA/CDR/aligningOutputStream.java | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/libjava/classpath/gnu/CORBA/CDR/aligningOutputStream.java b/libjava/classpath/gnu/CORBA/CDR/aligningOutputStream.java new file mode 100644 index 00000000000..8a682c1fd6d --- /dev/null +++ b/libjava/classpath/gnu/CORBA/CDR/aligningOutputStream.java @@ -0,0 +1,121 @@ +/* aligningOutputStream.java -- + Copyright (C) 2005 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.CORBA.CDR; + +import java.io.ByteArrayInputStream; +import java.io.ByteArrayOutputStream; + +import org.omg.CORBA.BAD_PARAM; + +/** + * The input stream with the possibility to align on the + * word (arbitrary size) boundary. + * + * @author Audrius Meskauskas (AudriusA@Bioinformatics.org) + */ +public class aligningOutputStream + extends ByteArrayOutputStream +{ + /** + * The alignment offset. + */ + private int offset = 0; + + /** + * Create a stream with the default intial buffer size. + */ + public aligningOutputStream() + { + } + + /** + * Create a stream with the given intial buffer size. + */ + public aligningOutputStream(int initial_size) + { + super(initial_size); + } + + /** + * Set the alignment offset, if the index of the first byte in the + * stream is different from 0. + */ + public void setOffset(int an_offset) + { + offset = an_offset; + } + + /** + * Skip several bytes, aligning the internal pointer on the + * selected boundary. + * + * @throws BAD_PARAM, minor code 0, the alignment is not possible, + * usually due the wrong parameter value. + */ + public void align(int alignment) + { + try + { + int d = (count + offset) % alignment; + if (d > 0) + { + skip(alignment - d); + } + } + catch (Exception ex) + { + BAD_PARAM p = new BAD_PARAM("Unable to align at " + alignment); + p.initCause(ex); + throw p; + } + } + + /** + * Write the specified number of zero bytes. + * + * @param bytes the number of zero bytes to write. + */ + public void skip(int bytes) + { + for (int i = 0; i < bytes; i++) + { + write(0); + } + } +} |