1 files changed, 83 insertions, 0 deletions
diff --git a/libjava/classpath/gnu/javax/sound/midi/file/MidiDataInputStream.java b/libjava/classpath/gnu/javax/sound/midi/file/MidiDataInputStream.java
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+++ b/libjava/classpath/gnu/javax/sound/midi/file/MidiDataInputStream.java
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+/* MidiDataInputStream.java -- adds variable length MIDI ints
+   Copyright (C) 2006 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.javax.sound.midi.file;
+
+import java.io.DataInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+
+/**
+ * MidiDataInputStream is simply a DataInputStream with the addition
+ * of special variable length int reading as defined by the MIDI spec.
+ *
+ * @author Anthony Green (green@redhat.com)
+ */
+public class MidiDataInputStream
+    extends DataInputStream
+{
+  /**
+   * Create a MidiDataInputStream.
+   */
+  public MidiDataInputStream(InputStream is)
+  {
+    super(is);
+  }
+
+  /**
+   * Read an int encoded in the MIDI-style variable length
+   * encoding format.
+   *
+   * @return an int
+   */
+  public int readVariableLengthInt()
+    throws IOException
+  {
+    int c, value = readByte();
+
+    if ((value & 0x80) != 0)
+      {
+         value &= 0x7F;
+         do
+         {
+           value = (value << 7) + ((c = readByte()) & 0x7F);
+         } while ((c & 0x80) != 0);
+      }
+
+    return value;
+  }
+}