obtained gcc-4.6.4.tar.bz2 from upstream website;upstream

verified gcc-4.6.4.tar.bz2.sig;
imported gcc-4.6.4 source tree from verified upstream tarball.

downloading a git-generated archive based on the 'upstream' tag
should provide you with a source tree that is binary identical
to the one extracted from the above tarball.

if you have obtained the source via the command 'git clone',
however, do note that line-endings of files in your working
directory might differ from line-endings of the respective
files in the upstream repository.

1 files changed, 188 insertions, 0 deletions

diff --git a/libjava/classpath/gnu/javax/imageio/jpeg/JPEGImageInputStream.java b/libjava/classpath/gnu/javax/imageio/jpeg/JPEGImageInputStream.java
new file mode 100644
index 000000000..f2c26d9d5
--- /dev/null
+++ b/libjava/classpath/gnu/javax/imageio/jpeg/JPEGImageInputStream.java
@@ -0,0 +1,188 @@
+/* JPEGImageInputStream.java --
+   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.imageio.jpeg;
+
+import java.io.IOException;
+import javax.imageio.stream.ImageInputStream;
+import javax.imageio.stream.ImageInputStreamImpl;
+
+public class JPEGImageInputStream
+  extends ImageInputStreamImpl
+{
+  private ImageInputStream in;
+
+  byte marker;
+
+  public JPEGImageInputStream(ImageInputStream in)
+  {
+    super();
+
+    this.in = in;
+  }
+
+  public int read()
+    throws IOException
+  {
+    setBitOffset(0);
+    return in.read();
+  }
+
+  public int read(byte[] data, int offset, int len)
+    throws IOException
+  {
+    setBitOffset(0);
+    return in.read(data, offset, len);
+  }
+
+  /**
+   * Pull a byte from the stream, this checks to see if the byte is 0xff
+   * and if the next byte isn't 0x00 (stuffed byte) it errors out. If it's
+   * 0x00 then it simply ignores the byte.
+   *
+   * @return the next byte in the buffer
+   *
+   * @throws IOException TODO
+   * @throws BitStreamException TODO
+   */
+  private byte pullByte() throws IOException, JPEGMarkerFoundException
+  {
+    byte mybyte = readByte();
+    // FIXME: handle multiple 0xff in a row
+    if(mybyte==(byte)(0xff))
+      {
+        byte secondbyte = readByte();
+        if(secondbyte != (byte)(0x00))
+          {
+            marker = secondbyte;
+            throw new JPEGMarkerFoundException();
+          }
+      }
+    return mybyte;
+  }
+
+  /**
+   * This returns the marker that was last encountered.  This should only be
+   * used if removeBit() throws a MarkerTagFound exception.
+   *
+   * @return marker as byte
+   */
+  public byte getMarker()
+  {
+    return marker;
+  }
+
+  /**
+   * Removes a bit from the buffer. (Removes from the top of a queue). This
+   * also checks for markers and throws MarkerTagFound exception if it does.
+   * If MarkerTagFound is thrown you can use getMarker() method to get the
+   * marker that caused the throw.
+   *
+   * @param l specifies how many bits you want to remove and add to the
+   *        integer
+   * @return the amount of bits specified by l as an integer
+   *
+   * @throws IOException TODO
+   * @throws JPEGMarkerFoundException
+   * @throws BitStreamException TODO
+   */
+  public int readBit()
+  throws IOException, JPEGMarkerFoundException
+{
+  checkClosed();
+
+  // Calc new bit offset here, readByte resets it.
+  int newOffset = (bitOffset + 1) & 0x7;
+
+  byte data = pullByte();
+
+  if (bitOffset != 0)
+    {
+        seek(getStreamPosition() - 1);
+        data = (byte) (data >> (8 - newOffset));
+    }
+
+  bitOffset = newOffset;
+  return data & 0x1;
+}
+
+
+  /**
+   * This method skips over the the data and finds the next position
+   * in the bit sequence with a X'FF' X'??' sequence.  Multiple X'FF
+   * bytes in sequence are considered padding and interpreted as one
+   * X'FF byte.
+   *
+   * @return the next marker byte in the stream
+   * @throws IOException if the end of the stream is reached
+   * unexpectedly
+   */
+  public byte findNextMarker()
+    throws IOException
+  {
+    boolean marked0xff = false;
+    byte byteinfo = JPEGMarker.X00;
+
+    setBitOffset(0);
+    while (true)
+      {
+        byteinfo = readByte();
+        if (!marked0xff)
+          {
+            if (byteinfo == JPEGMarker.XFF)
+              marked0xff = true;
+          }
+        else
+          {
+            if (byteinfo == JPEGMarker.XFF)
+              // Ignore the value 0xff when it is immediately
+              // followed by another 0xff byte.
+              continue;
+            else if (byteinfo == JPEGMarker.X00)
+              // The sequence 0xff 0x00 is used to encode the
+              // actual value 0xff.  So restart our search for a
+              // marker.
+              marked0xff = false;
+            else
+              // One or more 0xff values were follwed by a
+              // non-0x00, non-0xff value so return this as the
+              // marker byte.
+              return byteinfo;
+          }
+      }
+  }
+}