1 files changed, 127 insertions, 0 deletions
diff --git a/libjava/classpath/javax/imageio/stream/MemoryCacheImageInputStream.java b/libjava/classpath/javax/imageio/stream/MemoryCacheImageInputStream.java
new file mode 100644
index 000000000..e1ad71f58
--- /dev/null
+++ b/libjava/classpath/javax/imageio/stream/MemoryCacheImageInputStream.java
@@ -0,0 +1,127 @@
+/* MemoryCacheImageInputStream.java --
+   Copyright (C) 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 javax.imageio.stream;
+
+import java.io.BufferedInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+
+/**
+ * @author Michael Koch (konqueror@gmx.de)
+ */
+public class MemoryCacheImageInputStream extends ImageInputStreamImpl
+{
+  private InputStream stream;
+  private BufferedInputStream buffer;
+
+  private int READLIMIT = 2048;
+
+  public MemoryCacheImageInputStream(InputStream stream)
+  {
+    this.stream = stream;
+    buffer = new BufferedInputStream(stream);
+    buffer.mark(READLIMIT);
+  }
+
+  public void close()
+    throws IOException
+  {
+    super.close();
+    stream.close();
+  }
+
+  public void flushBefore(long position)
+    throws IOException
+  {
+    long prevFlushedPosition = getFlushedPosition();
+    super.flushBefore(position);
+    buffer.reset();
+    buffer.skip(getFlushedPosition() - prevFlushedPosition);
+    buffer.mark(READLIMIT);
+  }
+
+  public boolean isCached()
+  {
+    return true;
+  }
+
+  public boolean isCachedFile()
+  {
+    return false;
+  }
+
+  public boolean isCachedMemory()
+  {
+    return true;
+  }
+
+  public int read()
+    throws IOException
+  {
+    setBitOffset(0);
+    int retval = buffer.read();
+
+    if (retval != -1)
+      streamPos++;
+
+    return retval;
+  }
+
+  public int read(byte[] data, int offset, int len)
+    throws IOException
+  {
+    setBitOffset(0);
+    int retval = buffer.read(data, offset, len);
+
+    if (retval != -1)
+      {
+        streamPos += retval;
+      }
+
+    return retval;
+  }
+
+  public void seek(long position)
+  throws IOException
+  {
+    super.seek(position);
+    buffer.reset();
+    buffer.skip(position - getFlushedPosition());
+  }
+}