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//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 <[email protected]>
@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
|
