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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: DjVuGlobal.cpp,v 1.7 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
+
+/** This file impliments the DjVuProgressTask elements. The memory
+ functions are implimented in a separate file, because only the memory
+ functions should be compiled with out overloading of the memory functions.
+ */
+
+
+#ifdef NEED_DJVU_PROGRESS
+#include "DjVuGlobal.h"
+
+
+// ----------------------------------------
+
+#include "GOS.h"
+#include "GThreads.h"
+#include "GException.h"
+#include "GContainer.h"
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#define INITIAL 500
+#define INTERVAL 250
+
+class DjVuProgressTask::Data : public GPEnabled
+{
+public:
+ djvu_progress_callback *callback;
+ DjVuProgressTask *head;
+ const char *gtask;
+ unsigned long lastsigdate;
+ Data(djvu_progress_callback *_callback):
+ callback(_callback), head(0), gtask(0), lastsigdate(0) {}
+};
+
+
+static GPMap<void *,DjVuProgressTask::Data> &
+get_map(void)
+{
+ static GPMap<void *,DjVuProgressTask::Data> xmap;
+ return xmap;
+}
+
+djvu_progress_callback *
+DjVuProgressTask::set_callback(djvu_progress_callback *_callback)
+{
+ djvu_progress_callback *retval=0;
+ if(_callback)
+ {
+ GMap<void *,GP<DjVuProgressTask::Data> > &map=get_map();
+ void *threadID=GThread::current();
+ if(map.contains(threadID))
+ {
+ DjVuProgressTask::Data &data=*(map[threadID]);
+ retval=data.callback;
+ data.callback=_callback;
+ data.head=0;
+ data.gtask=0;
+ data.lastsigdate=0;
+ }else
+ {
+ map[threadID]=new Data(_callback);
+ }
+ }else
+ {
+ GMap<void *,GP<DjVuProgressTask::Data> > &map=get_map();
+ void *threadID=GThread::current();
+ if(map.contains(threadID))
+ {
+ DjVuProgressTask::Data &data=*(map[threadID]);
+ retval=data.callback;
+ data.callback=0;
+ data.head=0;
+ data.gtask=0;
+ data.lastsigdate=0;
+ map.del(threadID);
+ }
+ }
+ return retval;
+}
+
+DjVuProgressTask::DjVuProgressTask(const char *xtask,int nsteps)
+ : task(xtask),parent(0), nsteps(nsteps), runtostep(0), gdata(0), data(0)
+{
+ // gtask=task;
+ {
+ GMap<void *,GP<DjVuProgressTask::Data> > &map=get_map();
+ void *threadID=GThread::current();
+ if(map.contains(threadID))
+ {
+ gdata=new GP<Data>;
+ Data &d=*(data=((*(GP<Data> *)gdata)=map[threadID]));
+ if(d.callback)
+ {
+ unsigned long curdate = GOS::ticks();
+ startdate = curdate;
+ if (!d.head)
+ d.lastsigdate = curdate + INITIAL;
+ parent = d.head;
+ d.head = this;
+ }
+ }
+ }
+}
+
+DjVuProgressTask::~DjVuProgressTask()
+{
+ if (data && data->callback)
+ {
+ if (data->head != this)
+ G_THROW( ERR_MSG("DjVuGlobal.not_compatible") );
+ data->head = parent;
+ if (!parent)
+ {
+ unsigned long curdate = GOS::ticks();
+ if((*(data->callback))(data->gtask?data->gtask:"",curdate-startdate, curdate-startdate))
+ {
+ G_THROW("INTERRUPT");
+ }
+ }
+ }
+ delete (GP<Data> *)gdata;
+}
+
+void
+DjVuProgressTask::run(int tostep)
+{
+ if(data)
+ {
+ data->gtask=task;
+ if ((data->callback)&&(tostep>runtostep))
+ {
+ unsigned long curdate = GOS::ticks();
+ if (curdate > data->lastsigdate + INTERVAL)
+ signal(curdate, curdate);
+ runtostep = tostep;
+ }
+ }
+}
+
+void
+DjVuProgressTask::signal(unsigned long curdate, unsigned long estdate)
+{
+ int inprogress = runtostep;
+ if (inprogress > nsteps)
+ inprogress = nsteps;
+ if (inprogress > 0)
+ {
+ const unsigned long enddate = startdate+
+ (unsigned long)(((float)(estdate-startdate) * (float)nsteps) / (float)inprogress);
+ if (parent)
+ {
+ parent->signal(curdate, enddate);
+ }
+ else if (data && data->callback && curdate<enddate)
+ {
+ if((*(data->callback))(data->gtask?data->gtask:"",curdate-startdate, enddate-startdate))
+ {
+ G_THROW("INTERRUPT");
+ }
+ data->lastsigdate = curdate;
+ }
+ }
+}
+
+// Progress callback
+//
+djvu_progress_callback *
+djvu_set_progress_callback( djvu_progress_callback *callback )
+{
+ return DjVuProgressTask::set_callback(callback);
+}
+
+int djvu_supports_progress_callback(void) {return 1;}
+
+#else
+
+#ifndef HAS_DJVU_PROGRESS_TYPEDEF
+extern "C"
+{
+ void *djvu_set_progress_callback(void *);
+ int djvu_supports_progress_callback(void);
+}
+void *djvu_set_progress_callback(void *) { return 0; }
+int djvu_supports_progress_callback(void) {return 0;}
+#else
+int djvu_supports_progress_callback(void) {return 0;}
+djvu_progress_callback *
+djvu_set_progress_callback( djvu_progress_callback *) { return 0; }
+#endif
+
+#endif
+
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