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+//C- -*- C++ -*-
+//C- -------------------------------------------------------------------
+//C- DjVuLibre-3.5
+//C- Copyright (c) 2002 Leon Bottou and Yann Le Cun.
+//C- Copyright (c) 2001 AT&T
+//C-
+//C- This software is subject to, and may be distributed under, the
+//C- GNU General Public License, Version 2. The license should have
+//C- accompanied the software or you may obtain a copy of the license
+//C- from the Free Software Foundation at http://www.fsf.org .
+//C-
+//C- This program is distributed in the hope that it will be useful,
+//C- but WITHOUT ANY WARRANTY; without even the implied warranty of
+//C- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+//C- GNU General Public License for more details.
+//C-
+//C- DjVuLibre-3.5 is derived from the DjVu(r) Reference Library
+//C- distributed by Lizardtech Software. On July 19th 2002, Lizardtech
+//C- Software authorized us to replace the original DjVu(r) Reference
+//C- Library notice by the following text (see doc/lizard2002.djvu):
+//C-
+//C- ------------------------------------------------------------------
+//C- | DjVu (r) Reference Library (v. 3.5)
+//C- | Copyright (c) 1999-2001 LizardTech, Inc. All Rights Reserved.
+//C- | The DjVu Reference Library is protected by U.S. Pat. No.
+//C- | 6,058,214 and patents pending.
+//C- |
+//C- | This software is subject to, and may be distributed under, the
+//C- | GNU General Public License, Version 2. The license should have
+//C- | accompanied the software or you may obtain a copy of the license
+//C- | from the Free Software Foundation at http://www.fsf.org .
+//C- |
+//C- | The computer code originally released by LizardTech under this
+//C- | license and unmodified by other parties is deemed "the LIZARDTECH
+//C- | ORIGINAL CODE." Subject to any third party intellectual property
+//C- | claims, LizardTech grants recipient a worldwide, royalty-free,
+//C- | non-exclusive license to make, use, sell, or otherwise dispose of
+//C- | the LIZARDTECH ORIGINAL CODE or of programs derived from the
+//C- | LIZARDTECH ORIGINAL CODE in compliance with the terms of the GNU
+//C- | General Public License. This grant only confers the right to
+//C- | infringe patent claims underlying the LIZARDTECH ORIGINAL CODE to
+//C- | the extent such infringement is reasonably necessary to enable
+//C- | recipient to make, have made, practice, sell, or otherwise dispose
+//C- | of the LIZARDTECH ORIGINAL CODE (or portions thereof) and not to
+//C- | any greater extent that may be necessary to utilize further
+//C- | modifications or combinations.
+//C- |
+//C- | The LIZARDTECH ORIGINAL CODE is provided "AS IS" WITHOUT WARRANTY
+//C- | OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
+//C- | TO ANY WARRANTY OF NON-INFRINGEMENT, OR ANY IMPLIED WARRANTY OF
+//C- | MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
+//C- +------------------------------------------------------------------
+//
+// $Id: UnicodeByteStream.h,v 1.9 2003/11/07 22:08:22 leonb Exp $
+// $Name: release_3_5_15 $
+
+#ifndef _UNICODEBYTESTREAM_H_
+#define _UNICODEBYTESTREAM_H_
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+#if NEED_GNUG_PRAGMAS
+# pragma interface
+#endif
+
+
+/** @name UnicodeByteStream.h
+
+ Files #"UnicodeByteStream.h"# and #"UnicodeByteStream.cpp"# implement a parser for
+ files structured W3C Extensible Markup Language (XML) 1.0 (Second Edition).
+
+ Class \Ref{UnicodeByteStream} provides a way to read or write XML files.
+ files. Member functions provide an easy mean to position the underlying
+ \Ref{ByteStream}.
+
+ {\bf References} --- W3C Extensible Markup Language (XML) 1.0
+ (Second Edition)
+ \URL{http://www.w3.org/TR/2000/REC-xml-20001006.html}
+
+ @memo
+ XML file parser.
+ @author
+ Bill C Riemers <docbill@sourceforge.net>
+ @version
+ #$Id: UnicodeByteStream.h,v 1.9 2003/11/07 22:08:22 leonb Exp $# */
+//@{
+
+#include "DjVuGlobal.h"
+#include "GString.h"
+#include "ByteStream.h"
+
+
+#ifdef HAVE_NAMESPACES
+namespace DJVU {
+# ifdef NOT_DEFINED // Just to fool emacs c++ mode
+}
+#endif
+#endif
+
+
+
+/** ByteStream interface for an Unicode file.
+
+ Class #UnicodeByteStream# augments the #ByteStream# interface with
+ functions for navigating Unicode documents. It works in relation
+ with a ByteStream specified at construction time.
+
+ {\bf Reading an Unicode file} --- You can read an Unicode file by
+ constructing an #UnicodeByteStream# object attached to the ByteStream
+ containing the Unicode file.
+
+ {\bf Writing an Unicode file} --- You can write an Unicode file by
+ constructing an #UnicodeByteStream# object attached to the seekable
+ ByteStream object that will contain the XML file.
+
+ Writing an XML file requires a seekable ByteStream (see
+ \Ref{ByteStream::is_seekable}). This is not much of a problem because you
+ can always create the XML file into a \Ref{MemoryByteStream} and then use
+ \Ref{ByteStream::copy} to transfer the XML file into a non seekable
+ ByteStream. */
+
+class UnicodeByteStream : public ByteStream
+{
+protected:
+ UnicodeByteStream(const UnicodeByteStream &bs);
+ UnicodeByteStream(GP<ByteStream> bs,
+ const GStringRep::EncodeType encodetype=GStringRep::XUTF8);
+public:
+ /** Constructs an UnicodeByteStream object attached to ByteStream #bs#.
+ Any ByteStream can be used when reading an XML file. Writing
+ an XML file however requires a seekable ByteStream. */
+ static GP<UnicodeByteStream> create(GP<ByteStream> bs,
+ const GStringRep::EncodeType encodetype=GStringRep::XUTF8)
+ { return new UnicodeByteStream(bs,encodetype); }
+
+ // --- BYTESTREAM INTERFACE
+ ~UnicodeByteStream();
+ /// Sets the encoding type and seek's to position 0.
+ void set_encodetype(const GStringRep::EncodeType et=GStringRep::XUTF8);
+ void set_encoding(const GUTF8String &encoding);
+ /// Simmular to fgets(), except read aheads effect the tell() position.
+ virtual GUTF8String gets(size_t const t=0,unsigned long const stopat='\n',bool const inclusive=true);
+ /// Resets the gets buffering as well as physically seeking.
+ virtual int seek(long offset, int whence = SEEK_SET, bool nothrow=false);
+ /** Physically reads the specified bytes, and truncate the read ahead buffer.
+ */
+ virtual size_t read(void *buffer, size_t size);
+ /// Not correctly implimented...
+ virtual size_t write(const void *buffer, size_t size);
+ /// tell will tell you the read position, including read ahead for gets()...
+ virtual long tell(void) const;
+ /// Does a flush, and clears the read ahead buffer.
+ virtual void flush(void);
+
+ /// Find out how many lines have been read with gets.
+ int get_lines_read(void) const { return linesread; }
+protected:
+ /// The real byte stream.
+ GP<ByteStream> bs;
+ GUTF8String buffer;
+ int bufferpos;
+ int linesread;
+ long startpos;
+private:
+ // Cancel C++ default stuff
+ UnicodeByteStream & operator=(UnicodeByteStream &);
+};
+
+
+class XMLByteStream : public UnicodeByteStream
+{
+protected:
+ XMLByteStream(GP<ByteStream> &bs);
+ XMLByteStream(UnicodeByteStream &bs);
+ void init(void);
+public:
+ static GP<XMLByteStream> create(GP<ByteStream> bs);
+ static GP<XMLByteStream> create(UnicodeByteStream &bs);
+ // --- BYTESTREAM INTERFACE
+ ~XMLByteStream();
+};
+
+inline GP<XMLByteStream>
+XMLByteStream::create(UnicodeByteStream &bs)
+{
+ return new XMLByteStream(bs);
+}
+
+//@}
+
+
+#ifdef HAVE_NAMESPACES
+}
+# ifndef NOT_USING_DJVU_NAMESPACE
+using namespace DJVU;
+# endif
+#endif
+#endif
+