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diff --git a/Source/OpenEXR/IlmImf/ImfIO.h b/Source/OpenEXR/IlmImf/ImfIO.h
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+++ b/Source/OpenEXR/IlmImf/ImfIO.h
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+///////////////////////////////////////////////////////////////////////////
+//
+// Copyright (c) 2002, Industrial Light & Magic, a division of Lucas
+// Digital Ltd. LLC
+// 
+// All rights reserved.
+// 
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+// *       Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+// *       Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+// *       Neither the name of Industrial Light & Magic nor the names of
+// its contributors may be used to endorse or promote products derived
+// from this software without specific prior written permission. 
+// 
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+///////////////////////////////////////////////////////////////////////////
+
+
+#ifndef INCLUDED_IMF_IO_H
+#define INCLUDED_IMF_IO_H
+
+//-----------------------------------------------------------------------------
+//
+//	Low-level file input and output for OpenEXR.
+//
+//-----------------------------------------------------------------------------
+
+#include <ImfInt64.h>
+#include <string>
+
+namespace Imf {
+
+//-----------------------------------------------------------
+// class IStream -- an abstract base class for input streams.
+//-----------------------------------------------------------
+
+class IStream
+{
+  public:
+
+    //-----------
+    // Destructor
+    //-----------
+
+    virtual ~IStream ();
+    
+    
+    //-------------------------------------------------
+    // Does this input stream support memory-mapped IO?
+    //
+    // Memory-mapped streams can avoid an extra copy;
+    // memory-mapped read operations return a pointer
+    // to an internal buffer instead of copying data
+    // into a buffer supplied by the caller.
+    //-------------------------------------------------
+
+    virtual bool        isMemoryMapped () const;
+
+
+    //------------------------------------------------------
+    // Read from the stream:
+    //
+    // read(c,n) reads n bytes from the stream, and stores
+    // them in array c.  If the stream contains less than n
+    // bytes, or if an I/O error occurs, read(c,n) throws
+    // an exception.  If read(c,n) reads the last byte from
+    // the file it returns false, otherwise it returns true.
+    //------------------------------------------------------
+
+    virtual bool	read (char c[/*n*/], int n) = 0;
+    
+    
+    //---------------------------------------------------
+    // Read from a memory-mapped stream:
+    //
+    // readMemoryMapped(n) reads n bytes from the stream
+    // and returns a pointer to the first byte.  The
+    // returned pointer remains valid until the stream
+    // is closed.  If there are less than n byte left to
+    // read in the stream or if the stream is not memory-
+    // mapped, readMemoryMapped(n) throws an exception.  
+    //---------------------------------------------------
+
+    virtual char *	readMemoryMapped (int n);
+
+
+    //--------------------------------------------------------
+    // Get the current reading position, in bytes from the
+    // beginning of the file.  If the next call to read() will
+    // read the first byte in the file, tellg() returns 0.
+    //--------------------------------------------------------
+
+    virtual Int64	tellg () = 0;
+
+
+    //-------------------------------------------
+    // Set the current reading position.
+    // After calling seekg(i), tellg() returns i.
+    //-------------------------------------------
+
+    virtual void	seekg (Int64 pos) = 0;
+
+
+    //------------------------------------------------------
+    // Clear error conditions after an operation has failed.
+    //------------------------------------------------------
+
+    virtual void	clear ();
+
+
+    //------------------------------------------------------
+    // Get the name of the file associated with this stream.
+    //------------------------------------------------------
+
+    const char *	fileName () const;
+
+  protected:
+
+    IStream (const char fileName[]);
+
+  private:
+
+    IStream (const IStream &);			// not implemented
+    IStream & operator = (const IStream &);	// not implemented
+
+    std::string		_fileName;
+};
+
+
+//-----------------------------------------------------------
+// class OStream -- an abstract base class for output streams
+//-----------------------------------------------------------
+
+class OStream
+{
+  public:
+
+    //-----------
+    // Destructor
+    //-----------
+
+    virtual ~OStream ();
+  
+
+    //----------------------------------------------------------
+    // Write to the stream:
+    //
+    // write(c,n) takes n bytes from array c, and stores them
+    // in the stream.  If an I/O error occurs, write(c,n) throws
+    // an exception.
+    //----------------------------------------------------------
+
+    virtual void	write (const char c[/*n*/], int n) = 0;
+
+
+    //---------------------------------------------------------
+    // Get the current writing position, in bytes from the
+    // beginning of the file.  If the next call to write() will
+    // start writing at the beginning of the file, tellp()
+    // returns 0.
+    //---------------------------------------------------------
+
+    virtual Int64	tellp () = 0;
+
+
+    //-------------------------------------------
+    // Set the current writing position.
+    // After calling seekp(i), tellp() returns i.
+    //-------------------------------------------
+
+    virtual void	seekp (Int64 pos) = 0;
+
+
+    //------------------------------------------------------
+    // Get the name of the file associated with this stream.
+    //------------------------------------------------------
+
+    const char *	fileName () const;
+
+  protected:
+
+    OStream (const char fileName[]);
+
+  private:
+
+    OStream (const OStream &);			// not implemented
+    OStream & operator = (const OStream &);	// not implemented
+
+    std::string		_fileName;
+};
+
+
+//-----------------------
+// Helper classes for Xdr
+//-----------------------
+
+struct StreamIO
+{
+    static void
+    writeChars (OStream &os, const char c[/*n*/], int n)
+    {
+	os.write (c, n);
+    }
+
+    static bool
+    readChars (IStream &is, char c[/*n*/], int n)
+    {
+	return is.read (c, n);
+    }
+};
+
+
+struct CharPtrIO
+{
+    static void
+    writeChars (char *&op, const char c[/*n*/], int n)
+    {
+	while (n--)
+	    *op++ = *c++;
+    }
+
+    static bool
+    readChars (const char *&ip, char c[/*n*/], int n)
+    {
+	while (n--)
+	    *c++ = *ip++;
+
+	return true;
+    }
+};
+
+
+} // namespace Imf
+
+#endif