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DjVuErrorList.cpp

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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: DjVuErrorList.cpp,v 1.8 2003/11/07 22:08:20 leonb Exp $
// $Name: release_3_5_15 $

#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#if NEED_GNUG_PRAGMAS
# pragma implementation
#endif

#include "DjVuErrorList.h"
#include "DjVmDoc.h"
#include "GException.h"
#include "GContainer.h"
#include "GOS.h"
#include "DataPool.h"
#include <string.h>


#ifdef HAVE_NAMESPACES
namespace DJVU {
# ifdef NOT_DEFINED // Just to fool emacs c++ mode
}
#endif
#endif


DjVuErrorList::DjVuErrorList() {}

GURL
DjVuErrorList::set_stream(GP<ByteStream> xibs)
{
  GUTF8String name;
  static unsigned long serial=0;
  pool=DataPool::create(xibs);
  name.format("data://%08lx/%08lx.djvu",
    ++serial,(unsigned long)(size_t)((const ByteStream *)xibs));
  pool_url=GURL::UTF8(name);
  return pool_url;
}

bool
DjVuErrorList::notify_error(const DjVuPort * source, const GUTF8String & msg)
{
  Errors.append(msg);
  return 1;
}

bool
DjVuErrorList::notify_status(const DjVuPort * source, const GUTF8String &msg)
{
  Status.append(msg);
  return 1;
}  

GUTF8String
DjVuErrorList::GetError(void)
{
  GUTF8String PrevError;
  GPosition pos;
  if((pos=Errors))
  {
    PrevError=Errors[pos];
    Errors.del(pos);
  }
  return PrevError;
}

GUTF8String
DjVuErrorList::GetStatus(void)
{
  GUTF8String PrevStatus;
  GPosition pos;
  if((pos=Status))
  {
    PrevStatus=Status[pos];
    Status.del(pos);
  }
  return PrevStatus;
}

GP<DataPool>
DjVuErrorList::request_data(const DjVuPort * source, const GURL & url)
{
   GP<DataPool> retval;
   G_TRY
   {
     if (pool && url.protocol().downcase() == "data")
     {
       if(url == pool_url)
       {
         retval=pool;
       }else if(url.base() == pool_url)
       {
         GUTF8String name=url.fname();
         GP<DjVmDoc> doc=DjVmDoc::create();
         GP<ByteStream> bs=pool->get_stream();
         doc->read(*bs);
         retval=doc->get_data(name);
       }
     }else if (url.is_local_file_url())
     {
//       GUTF8String fname=GOS::url_to_filename(url);
//       if (GOS::basename(fname)=="-") fname="-";
       retval=DataPool::create(url);
     }
   }
   G_CATCH_ALL
   {
     retval=0;
   } G_ENDCATCH;
   return retval;
}
 

#ifdef HAVE_NAMESPACES
}
# ifndef NOT_USING_DJVU_NAMESPACE
using namespace DJVU;
# endif
#endif

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